CN104570469A - Display device and driving method thereof - Google Patents
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- CN104570469A CN104570469A CN201510084069.1A CN201510084069A CN104570469A CN 104570469 A CN104570469 A CN 104570469A CN 201510084069 A CN201510084069 A CN 201510084069A CN 104570469 A CN104570469 A CN 104570469A
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- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
- G02F1/1333—Constructional arrangements; Manufacturing methods
- G02F1/1347—Arrangement of liquid crystal layers or cells in which the final condition of one light beam is achieved by the addition of the effects of two or more layers or cells
-
- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
- G02F1/1333—Constructional arrangements; Manufacturing methods
- G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
- G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
- G09G3/22—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources
- G09G3/30—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels
- G09G3/32—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED]
- G09G3/3208—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED] organic, e.g. using organic light-emitting diodes [OLED]
-
- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
- G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
- G09G3/34—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source
- G09G3/36—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source using liquid crystals
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- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
- H10K59/00—Integrated devices, or assemblies of multiple devices, comprising at least one organic light-emitting element covered by group H10K50/00
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- Crystallography & Structural Chemistry (AREA)
- Computer Hardware Design (AREA)
- Theoretical Computer Science (AREA)
- Mathematical Physics (AREA)
- Optics & Photonics (AREA)
- Control Of Indicators Other Than Cathode Ray Tubes (AREA)
- Devices For Indicating Variable Information By Combining Individual Elements (AREA)
Abstract
The invention provides a display device and a driving method thereof, relating to the technical field of display, and solving the problem that high resolution ratio of the conventional display panel is difficultly realized. The display device comprises a display panel, a first driver module, a second driver module, and an optical modulator positioned on the light emergent side of the display panel; multiple prism structures are formed between the display panel and the optical modulator; the pixels comprise n virtual pixels; the optical modulation unit comprises n optical modulation areas which correspond to the virtual pixels; a frame picture comprises n sub-frame pictures; the first driver module is used for driving the display panel to sequentially display n continuous sub-frame pictures in the frame picture; the second driver module is used for driving the n optical modulation areas of the optical modulation unit to be sequentially light-transmitting areas in the n sub-frame pictures, and other (n-1) optical modulation areas are shading areas. Moreover, the optical modulator reflects one part of light rays in the shading areas to enter the prism structures, so that the one part of light rays can be emitted from the light-transmitting areas.
Description
Technical Field
The present invention relates to the field of display technologies, and in particular, to a display device and a driving method thereof.
Background
In the field of electronic displays, the aim has been to seek clearer images, which is mainly achieved by improving the display resolution. The display resolution is the precision of the display image, and refers to the number of pixels that can be displayed by the display. The more pixels that can be displayed by the display, the finer the picture and the more information that can be displayed in the same screen area.
Oled (organic light Emitting Diode) display panels are favored because they can self-emit light and are made of organic materials, which can be rolled, folded, etc. The light emitting principle of the OLED display panel is as follows: an organic light-emitting layer is deposited between the two electrodes, after the two electrodes are electrified, holes and electrons are injected into the organic light-emitting layer to form excitons, and the organic light-emitting layer emits light after the excitons are de-excited.
However, the organic light emitting layer of the OLED is generally prepared by a mask evaporation method, that is, the organic light emitting layer is formed by a mask plate and is limited by the mask plate, so that the organic light emitting layer cannot have a smaller area, and the pixel area is larger, thereby causing that the organic light emitting layer cannot meet the requirement of a product with high display resolution.
Disclosure of Invention
Embodiments of the present invention provide a display device capable of achieving a high-resolution display effect, and a driving method thereof.
In order to achieve the above purpose, the embodiment of the invention adopts the following technical scheme:
in one aspect, an embodiment of the present invention provides a display device, including a display panel, a first driving module, a second driving module, and an optical modulator located on a light exit side of the display panel, where a plurality of prism structures are formed between the display panel and the optical modulator, the display panel includes a plurality of pixels, the pixels include n virtual pixels, the optical modulator includes a plurality of optical modulation units corresponding to the pixels, and the optical modulation units include: n light modulation regions respectively corresponding to the dummy pixels; one frame of picture comprises n sub-frame pictures;
the first driving module is used for driving the display panel to sequentially display n continuous sub-frame pictures in one frame picture;
the second driving module is used for driving n light modulation areas of the light modulation unit to be light transmission areas in n sub-frame pictures in sequence, the other n)1 light modulation areas are light shielding areas, the optical modulator is used for reflecting part of light rays of the light shielding areas to enter the prism structure so as to be emitted from the light transmission areas, and n is a positive integer greater than or equal to 2.
On the other hand, an embodiment of the present invention provides a driving method of a display device, including:
driving the display panel to sequentially display n continuous sub-frame pictures in one frame picture;
the n light modulation areas for driving the light modulation units are light transmission areas in the n sub-frame pictures in sequence, the other n)1 light modulation areas are light shading areas, the light shading light modulation areas can reflect light, and n is a positive integer greater than or equal to 2.
The embodiment of the invention provides a display device and a driving method thereof, wherein a display panel sequentially displays n continuous sub-frame pictures in a frame picture, n light modulation areas of a light modulation unit are light transmission areas in the n sub-frame pictures, and the other n)1 light modulation areas are light shading areas, namely when the display panel displays any one sub-frame display picture, the light modulation area corresponding to one virtual pixel of the pixel is light transmission, the virtual pixel realizes display, and the other virtual pixels are not effective pixels due to the light shading of the light modulation areas. Compared with the existing display, the method has the advantages that one frame of display picture is divided into a plurality of sub-frame pictures to be displayed respectively, a user feels the improvement of the display resolution visually, and compared with the traditional method for changing the manufacturing process of the display panel and reducing the pixel area to improve the display resolution, the method for improving the display resolution can improve the visual display resolution without improving the manufacturing method of the display panel, so that the process difficulty and the cost for realizing high-resolution display are greatly reduced. And because the light modulation area of shading can reflect light, can reflect the light of the area of shading to the light transmission area and send out to further improve the light-emitting luminance of light transmission area.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
Fig. 1 is a schematic diagram of a display device according to an embodiment of the present invention;
FIG. 2 is a schematic view of the display device shown in FIG. 1 from direction A-A';
fig. 3 is a schematic diagram of a prism layer corresponding to a pixel according to an embodiment of the present invention;
FIG. 4 is a schematic view of another prism layer provided in accordance with an embodiment of the present invention;
FIG. 5 is a schematic diagram illustrating an arrangement of pixels of a display panel according to an embodiment of the present invention;
FIG. 6 is a schematic diagram of a grating unit corresponding to the pixel shown in FIG. 5 according to an embodiment of the present invention;
fig. 7 is a schematic diagram illustrating a driving of a display device according to an embodiment of the invention;
FIG. 8 is a schematic view of the display device shown in FIG. 7 in the directions of a-a ', b-b ', and c-c ';
FIG. 9 is a schematic diagram of another pixel arrangement of a display panel according to an embodiment of the present invention;
FIG. 10 is a schematic diagram of a grating unit corresponding to the pixel shown in FIG. 9 according to an embodiment of the present invention;
fig. 11 is a schematic diagram illustrating a driving method of a display device according to an embodiment of the invention;
FIG. 12 is a schematic view of the display device shown in FIG. 11 from a-a 'and b-b';
fig. 13 is a schematic diagram illustrating a driving operation of another display device according to an embodiment of the present invention;
fig. 14 is a schematic diagram illustrating a driving operation of another display device according to an embodiment of the present invention;
fig. 15 is a schematic driving diagram of another display device according to an embodiment of the invention.
Reference numerals:
10-a display panel; 11-pixel; 111-a first virtual pixel; 112-a second virtual pixel; 113-a third virtual pixel; 20-a grating structure; 21-a grating unit; 22-a bar light valve; 211-a first grating region; 212-a second grating region; 213-third grating region; 30-a first drive module; 40-a second drive module; 50-a prism layer; 51-a first inclined surface; 52-second inclined surface; 53-parallel plane; 100-display device.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
An embodiment of the present invention provides a display device 100, as shown in fig. 1-2, including a display panel 10, a first driving module 30, a second driving module 40, and an optical modulator 20 located at a light emitting side of the display panel 10, wherein a plurality of prism structures are formed between the display panel 10 and the optical modulator 20, and a plurality of prism structures are formed on a prism layer 50 in fig. 2; the display panel 10 includes a plurality of pixels 11. The pixels include n virtual pixels; the optical modulator 20 includes a plurality of light modulation units 21 corresponding to the pixels 11, the light modulation units including: n light modulation regions respectively corresponding to the virtual pixels, and one frame picture comprises n sub-frame pictures.
The first driving module is used for driving the display panel to sequentially display n continuous sub-frame pictures in one frame picture; the second driving module is used for driving n light modulation areas of the light modulation unit to be light transmission areas in n sub-frame pictures in sequence, the other n-1 light modulation areas are light shading areas, the other sub-frame pictures are light shading areas, the optical modulator reflects part of light rays in the light shading areas to enter the prism structure, and the light rays are reflected and refracted by the prism structure to be emitted from the light transmission areas, wherein n is a positive integer greater than or equal to 2.
It should be noted that both the display panel and the optical modulator include a multilayer film and a layer structure, and the specific structures of the display panel and the optical modulator are not limited in the embodiment of the present invention. And the pixel is formed by the multi-layer thin film and the layer structure on the display panel, and the light modulation unit is formed by the multi-layer thin film and the layer structure on the optical modulator, and the pixel and the light modulation unit in fig. 2 are only illustrated as examples. The pixels can be pixels with different colors such as red, green and blue, and the three pixels of red, green and blue form a pixel unit. Of course, the pixel unit may also be a pixel including red, green, blue, white or four different colors of red, green, blue, yellow, etc. The embodiment of the present invention does not limit the color and shape of the pixels and the specific arrangement of the pixels. Specifically, the first driving module and the second driving module may be the same module, which may perform multiple functions. Or may be different driver modules each performing its own function. In fig. 1, the first driving module 30 and the second driving module 40 are two different driving modules, respectively. It should be noted here that although the first driving module and the second driving module have different functions, in the display device, the first driving module and the second driving module must be driven in coordination so that n light modulation regions that drive the light modulation units are light-transmitting regions in the n subframes in sequence, and the other n-1 light modulation regions are light-shielding regions.
In the embodiment of the present invention, the pixel includes n virtual pixels, and the light modulation unit includes: n light modulation regions respectively corresponding to the virtual pixels; correspondingly, one frame of picture comprises n sub-frame pictures, wherein in the n sub-frame pictures, the image information on the display panel is different, that is, in the continuous n sub-frame pictures, the image information between each sub-frame is generally different, so that each effective virtual pixel displays different images, and the fineness of the display picture is further improved. As shown in fig. 2, taking an example that a prism layer 50 is formed between the display panel 20 and the light modulator 10, the prism layer 50 includes a plurality of prism structures, and the plurality of prism structures form a plurality of concave surfaces, that is, the prism layer includes a plurality of concave surfaces, and the concave surfaces correspond to the pixels.
Specifically, the prism layer has a specific transmission and reflection function, but the transmittance and the reflectance thereof may be set to different values according to specific situations, and the embodiment of the present invention is not particularly limited. For example, the optical element may be a half-mirror prism, i.e., the transmittance and reflectance are 50% respectively. It may also be preferred that the transmission be greater than the reflection, for example 70% transmission, 30% reflection or 80% transmission, 20% reflection. In addition, the embodiment of the invention preferably takes the prism layer as a transflective prism layer for detailed description. Optionally, the prism layer may be a liquid crystal polarizing cell.
Of course, the plurality of prism structures formed on the light-emitting side of the display panel may also be formed on the surface of the light-emitting side substrate of the display panel, or formed on the surface of the light-entering side substrate of the optical modulator close to the display panel. The embodiments of the present invention and the accompanying drawings will be described in detail with reference to the case where a prism structure is formed on a prism layer.
The display panel includes a plurality of pixels, and the optical modulator includes light modulation cells corresponding to the pixels. Here, the light modulation unit may include a one-to-one correspondence with the pixel, or one light modulation unit may correspond to a plurality of pixels, and the following description will be given taking an example in which the light modulation unit corresponds to the pixel one-to-one. It should be noted that the virtual pixel refers to a geometric area portion of the pixel, and is not necessarily one-half of the pixel, and only when the pixel includes two virtual pixels, the virtual pixel may be one-half of the pixel. The pixel includes n virtual pixels, and the light modulation unit includes: n light modulation regions respectively corresponding to the dummy pixels. The first driving module is used for driving the display panel to display n continuous sub-frame pictures in one frame picture in sequence; the second driving module is used for driving n light modulation areas of the light modulation unit to be light transmission areas in n sub-frame pictures in sequence, and the other n-1 light modulation areas are light shielding areas, wherein n is a positive integer greater than or equal to 2, namely n can be 2, 3, 4 and the like.
Specifically, n is equal to 3 for example. As shown in fig. 5, the pixel includes 3 virtual pixels, i.e., a first virtual pixel 111, a second virtual pixel 112, and a third virtual pixel 113. The light modulation unit includes 3 light modulation regions, i.e., a first light modulation region 211, a second light modulation region 212, and a third light modulation region 213, which correspond one-to-one to 3 virtual pixels of a pixel, as shown in fig. 6. The first driving module drives the display panel to sequentially display 3 continuous sub-frame pictures in the frame picture, and 3 virtual pixels of the light modulation unit only have one light transmission part in each sub-frame and the other two light shading parts. Specifically, as shown in fig. 7, when the display panel displays a first sub-frame picture, the first light modulation region corresponding to the first virtual pixel 111 transmits light, and the second light modulation region 212 and the third light modulation region 213 shield light; when the display panel displays a second subframe picture, the second light modulation area corresponding to the second virtual pixel 112 is transparent, and the first light modulation area 211 and the third light modulation area 213 are light-shielded; when the display panel displays a third subframe picture, the third light modulation region corresponding to the third virtual pixel 113 transmits light, and the first light modulation region 211 and the second light modulation region 212 shield light. In the case where the pixel includes 3 dummy pixels, as shown in fig. 8, the concave surface includes a first inclined surface 51, a second inclined surface 52, and a parallel surface 53. The optical modulator is used for reflecting part of light rays in the shading area to enter the prism structure, and the light rays are emitted from the light-transmitting area through reflection and refraction of the prism structure, so that the light-emitting brightness of the light-transmitting area is further improved.
Here, the driving frequency of the conventional display panel is 60Hz, that is, 60 frames of pictures are displayed in one second, and since one pixel of the conventional display panel is completely an effective display pixel in one frame of pictures, the display time of one frame of pictures is 1/60 s; in case that the pixels include 3 dummy pixels, the driving frequency of the display panel may be 180Hz, that is, 180 frames of pictures are displayed one second, the display time of one sub-frame of pictures is 1/180s, and the display time of one frame of pictures is 1/60 s.
In the embodiment of the invention, the display panel sequentially displays n continuous sub-frame pictures in one frame picture, n light modulation areas of the light modulation unit are light transmission areas in the n sub-frame pictures in sequence, and the other n-1 light modulation areas are light shading areas, namely, the display panel displays any one sub-frame display picture, the light modulation area corresponding to one virtual pixel of the pixel is light transmission, the virtual pixel realizes display, and the other virtual pixels are not effective pixels due to the light shading of the light modulation areas. Compared with the existing display, the method has the advantages that one frame of display picture is divided into a plurality of sub-frame pictures to be displayed respectively, a user feels the improvement of the display resolution visually, and compared with the traditional method for changing the manufacturing process of the display panel and reducing the pixel area to improve the display resolution, the method for improving the display resolution can improve the visual display resolution without improving the manufacturing method of the display panel, so that the process difficulty and the cost for realizing high-resolution display are greatly reduced. And the optical modulator reflects part of light rays in the shading area into the prism structure, and the part of light rays are emitted from the light-transmitting area through reflection and refraction of the prism structure, so that the light-emitting brightness of the light-transmitting area can be improved.
Optionally, the optical modulator is a cholesteric liquid crystal grating, and the cholesteric liquid crystal grating includes a cholesteric liquid crystal panel and polarizing film layers located on two sides of the cholesteric liquid crystal panel;
under the condition that the cholesteric liquid crystal is levorotatory liquid crystal, the polarizing film layer is used for enabling the light entering the cholesteric liquid crystal panel to be levorotatory and circularly polarized light; or,
and under the condition that the cholesteric liquid crystal is right-handed liquid crystal, the polarizing film layer is used for enabling the light entering the cholesteric liquid crystal panel to be right-handed circularly polarized light.
Here, a cholesteric liquid crystal panel, which has a structure similar to that of a conventional LCD panel, includes an upper substrate, a lower substrate, and cholesteric liquid crystal between the upper substrate and the lower substrate.
If the cholesteric liquid crystal is right-handed cholesteric liquid crystal, the polarizing film layer changes the light into right-handed circularly polarized light in a single direction. At this time, under the condition that the upper substrate and the lower substrate are loaded with voltage, the arrangement direction of cholesteric liquid crystal is changed by an electric field between the upper substrate and the lower substrate, and then the right-handed circularly polarized light can pass through the cholesteric liquid crystal, so that the cholesteric liquid crystal panel is transparent; under the condition that no voltage is applied to the upper substrate and the lower substrate, the right-handed polarized light is reflected when passing through the right-handed cholesteric liquid crystal, and the right-handed polarized light cannot pass through the cholesteric liquid crystal, so that the cholesteric liquid crystal display panel is light-tight.
Similarly, if the cholesteric liquid crystal is left-handed cholesteric liquid crystal, the polarizing film layer changes the light into left-handed circularly polarized light in a single direction. At this time, under the condition that the upper substrate and the lower substrate are loaded with voltage, the arrangement direction of cholesteric liquid crystal is changed by an electric field between the upper substrate and the lower substrate, and left-handed circularly polarized light can pass through the cholesteric liquid crystal, so that the cholesteric liquid crystal panel is transparent; under the condition that no voltage is applied to the upper substrate and the lower substrate, the left-handed polarized light is reflected when passing through the left-handed cholesteric liquid crystal, and the left-handed polarized light cannot pass through the cholesteric liquid crystal, so that the cholesteric liquid crystal display panel is light-tight.
In the light modulation area of the cholesteric liquid crystal grating, the cholesteric liquid crystal in the light shading light modulation area reflects light rays by the cholesteric liquid crystal to enter the prism structure, and part of the light rays are emitted from the light transmission light modulation area after multiple reflection and refraction, so that the brightness of the light transmission area can be improved.
Preferably, the cholesteric liquid crystal may be a broad-spectrum cholesteric liquid crystal. That is, the wavelength range of the reflected light of the cholesteric liquid crystal is wide, and light having different wavelengths can be reflected.
Optionally, the polarizing film layer is a circular polarizer. Alternatively, the deflecting film layer may include a linear polarizer and a phase retardation film, and the light is converted into linearly polarized light after passing through the linear polarizer and then converted into circularly polarized light after passing through the phase retardation film. Here, the left-handed circularly polarizing plate may convert light into left-handed polarized light, and the right-handed circularly polarizing plate may convert light into right-handed polarized light.
In the embodiment of the invention, the display panel can be a liquid crystal display panel, an organic light emitting diode display panel, an electronic paper display panel and the like. Because the organic light emitting diode display panel adopts mask evaporation, the pixel area of the organic light emitting diode display panel is large, and the requirement of high resolution is difficult to meet, preferably, the display panel is the organic light emitting diode display panel, and the problem that the manufacturing process of the organic light emitting diode display device for realizing the requirement of high resolution is complex is solved.
Furthermore, the organic light emitting diode display panel is a double-sided display panel, and two sides of the organic light emitting diode display panel are respectively provided with an optical modulator. Both sides of the displayed image can satisfy the requirement of high resolution. Of course, the organic light emitting diode display panel may be a bottom emission type display device or a top emission type display device, and the embodiment of the present invention is not particularly limited.
Optionally, the organic light emitting diode display panel includes an array substrate and a package substrate, where the package substrate is a glass substrate or a package film. Specifically, the embodiments of the present invention are not limited to the specific packaging of the organic light emitting diode display panel.
Preferably, as shown in fig. 9, the pixel 11 includes two virtual pixels, i.e., the pixel includes a first virtual pixel 111 and a second virtual pixel 112. It should be noted that the positions and sizes of the first virtual pixel and the second virtual pixel in each pixel may be variable, fig. 9 is an example, and the embodiment of the present invention is described in detail only by taking the example shown in fig. 9 as an example. As shown in fig. 10, the light modulation unit 21 includes two light modulation regions corresponding to the dummy pixels 11, respectively, i.e., the light modulation unit 21 includes a first light modulation region 211 and a second light modulation region 212. The first light modulation region 211 corresponds to the first dummy pixel 111, and the second light modulation region 212 corresponds to the second dummy pixel 112. Of course, the first light modulation region may correspond to the second virtual pixel, and the second light modulation region may correspond to the first virtual pixel.
Correspondingly, one frame of picture comprises two sub-frame pictures. When the first driving module drives the display panel to display a first subframe picture in a frame picture, the second driving module is specifically used for driving two light modulation areas of the light modulation unit to be a light-transmitting area and a light-shielding area respectively; when the first driving module drives the display panel to display a second subframe picture in a frame picture, the second driving module is specifically used for driving the light transmittance of each light modulation area of the light modulation unit to be opposite to the light transmittance of the light modulation area when the display panel displays the first subframe picture.
Specifically, as shown in fig. 11, when the first driving module 30 drives the display panel 10 to display a first sub-frame picture in a frame picture, the second driving module 40 drives the first light modulation region 211 of the light modulation unit 21 to be a light-transmitting region, and the second light modulation region 212 to be a light-shielding region, at this time, as shown in fig. 12, light of the second light modulation region 212 is reflected by cholesteric liquid crystal to enter the prism layer 50, and finally, light is reflected and/or refracted by the prism structure of the prism layer 50 and is emitted from the first light modulation region 211, that is, the light-transmitting region; when the first driving module 30 drives the display panel 10 to display a second sub-frame picture in a frame picture, the second driving module 40 drives the first light modulation region 211 of the grating 21 to be a light-shielding region and the second light modulation region 212 to be a light-transmitting region, at this time, as shown in fig. 12, light of the first light modulation region 211 enters the prism layer 50 through cholesteric liquid crystal reflection, and finally, the light is reflected and/or refracted by the prism structure of the prism layer 50 and is emitted from the second light modulation region 212, i.e., the light-transmitting region. At this time, the driving frequency of the display panel may be 120 Hz. The existing frame of picture can be displayed respectively after two sub-frames of picture are multiplied, so that a user feels the improvement of the display resolution visually, and the optical modulator reflects part of light rays in the shading area into the prism structure, so that part of light rays are emitted from the light-transmitting area through the reflection and refraction of the prism structure, and the light-emitting brightness of the light-transmitting area is improved.
Optionally, the concave face comprises two inclined faces. As shown in fig. 3, the concave surface includes a first inclined surface 51 and a second inclined surface 52. The concave surface may also be a hemispherical profile as shown in fig. 4, or the like. In the case that the pixel includes two virtual pixels, it is preferable in the embodiment of the present invention that the two virtual pixels are half of the pixel, and the first inclined plane and the second inclined plane are mirror images of each other, for example, to describe in detail, so as to equalize the light intensity of the two virtual pixels.
Further, the included angle between the two inclined surfaces is 30 ° to 150 °, that is, as shown in fig. 3, the included angle α between the first inclined surface 51 and the second inclined surface 52 is 30 ° to 150 °. Of course, the included angle between the first inclined surface and the second inclined surface may be other angles, for example, 20 ° or 160 ° may also be used. Preferably, in the embodiment of the present invention, the included angle α between the first inclined surface 51 and the second inclined surface 52 is 90 °. Here, in the case where the first inclined surface and the second inclined surface are asymmetrical to each other, an angle between the first inclined surface and the second inclined surface may be 90 °, an angle between the first inclined surface and the bottom surface may be 60 °, and an angle between the second inclined surface and the bottom surface may be 30 °. Under the condition that the first inclined plane and the second inclined plane are symmetrical to each other, the included angle between the first inclined plane and the second inclined plane is 90 degrees, and then the included angles between the first inclined plane and the bottom plane and the included angles between the second inclined plane and the bottom plane are both 45 degrees. In a case that the pixel includes two virtual pixels, it is preferable that the first inclined plane and the second inclined plane are symmetrical to each other and have an included angle of 90 ° in order to equalize the light-emitting intensities of the two virtual pixels.
Optionally, the virtual pixels of the display panel are arranged in an array; as shown in fig. 9, the first dummy pixels 111 and the second dummy pixels 112 are arranged in a matrix. When the first driving module drives the display panel to display a first frame of picture in a frame of picture, the second driving module is specifically used for driving two arbitrarily adjacent light modulation regions in each row and/or two arbitrarily adjacent light modulation regions in each column of the light modulation unit to be a light transmission region and a light shielding region respectively.
Specifically, if the optical modulator includes the strip light valves disposed in each row of the light modulation regions, that is, one light modulation unit is a strip light valve corresponding to one row of pixels, one strip light valve controls one row of the light modulation regions to transmit light or shield light. As shown in fig. 11, taking an example that the light modulation unit includes two light modulation regions, when the first driving module drives the display panel to display a first sub-frame picture in a frame picture, the second driving module drives any one row of light modulation regions to be transparent, and the adjacent row of light modulation regions is shielded, at this time, the light transmission of the light modulation regions in the same row is the same, and the light transmission of any two adjacent rows of light modulation regions is opposite, and any two adjacent light modulation regions in each column are respectively a transparent region and a shielded region.
In addition, in the case that the optical modulator includes the strip light valves disposed in each row of the light modulation regions, as shown in fig. 14, two strip light valves may also be used to make two adjacent rows of the light modulation regions (i.e. corresponding to two strip light valves 22) in two adjacent rows of pixels be light-shielding regions, where fig. 14a is a schematic diagram of two adjacent rows of pixels, and fig. 14b is a schematic diagram of two adjacent rows of the light modulation regions in two adjacent rows of pixels being light-shielding regions, that is, two strip light valves respectively control two adjacent rows of the light modulation regions in two adjacent pixels. Alternatively, as shown in fig. 15, one bar-shaped light valve 22 may correspond to two adjacent light modulation regions in two adjacent rows of virtual pixels, that is, one bar-shaped light valve controls two rows of light modulation regions, so that two adjacent rows of light modulation regions (that is, corresponding to one bar-shaped light valve 22) in two adjacent rows of pixels are both light-shielding regions.
If the optical modulator includes strip-shaped light valves disposed in each row of light modulation regions, that is, one light modulation unit is a strip-shaped light valve corresponding to one row of pixels, one strip-shaped light valve controls one row of light modulation regions to transmit light or shield light, as shown in fig. 14. When the first driving module drives the display panel to display a first sub-frame picture in a frame picture, the second driving module is used for enabling any row of light modulation regions to be transparent and enabling the adjacent row of light modulation regions to be light-proof, at the moment, the light transmission of the light modulation regions in the same row is the same, and any two adjacent light modulation regions in each row are respectively a transparent region and a light-proof region. And under the condition that the optical modulator comprises the strip-shaped light valve arranged in each row of light modulation regions, two adjacent rows of light modulation regions can be both light-shielding regions, and two adjacent rows of light modulation regions are both light-transmitting regions. Alternatively, the stripe light valve may be made to correspond to two adjacent light modulation regions in adjacent columns of virtual pixels, as shown in fig. 15.
Or, the optical modulator may further include a light valve disposed in each light modulation region, and in a case where the light modulation units correspond to the virtual pixels one to one, each light modulation unit transmits or blocks light through one light valve controller, so that any one of the virtual pixels on the display panel may be controlled to display an image or not display an image. And in the case that the optical modulator includes a light valve disposed in each light modulation region, by controlling each light valve, it is also possible to implement the interval arrangement of the light transmission region and the light shielding region corresponding to any two adjacent pixels as shown in fig. 13, that is, any two adjacent light modulation regions in each row and any two adjacent light modulation regions in each column are the light transmission region and the light shielding region, respectively, so as to generate visual compensation in space, so as to improve the display effect. Fig. 13 shows an example in which a pixel includes two dummy pixels.
Optionally, the display device further includes a touch electrode, and the touch electrode is used for detecting a touch position. In other words, in the embodiment of the present invention, the display device is a touch display device, which can control the image display of the display panel according to the touch signal. Specifically, the touch electrode may include a touch sensing electrode and a touch driving electrode, and the specific shape of the touch electrode may be set by referring to the existing display device, which is not described herein.
Since the optical modulator is disposed on the light emitting side of the display panel, in order to enhance the sensing of the touch signal, it is preferable that the touch electrode is disposed on the optical modulator.
When the touch driving electrodes and the touch sensing electrodes are disposed on the optical modulator, there may be a plurality of different ways according to specific situations. Specifically, the cholesteric liquid crystal panel includes an upper substrate, a lower substrate, and a cholesteric liquid crystal located between the upper substrate and the lower substrate, where the touch driving electrodes and the touch sensing electrodes may be simultaneously disposed on the upper substrate, the lower substrate, or the upper substrate and the lower substrate, respectively. The touch driving electrodes and the touch sensing electrodes are disposed on the optical modulator and disposed on other films or layer structures, but the embodiments of the present invention are not limited thereto, and the description is given only by way of example.
In the following, the method for manufacturing the display device according to the embodiment of the present invention is described in detail by taking the display panel as an organic light emitting diode display panel.
And step 10, forming an organic light emitting diode display panel.
Specifically, the step 10 specifically includes: cleaning a transparent substrate by adopting a standard method, then depositing a metal layer (Mo can be deposited and 200nm is deposited), and simultaneously forming alignment patterns including a grid electrode and a grid line by patterning the metal layer; depositing an insulating layer (which may be SiO deposition)2And depositing 150 nm); depositing a semiconductor layer (which can be IGZO deposition and 40nm deposition), and patterning to form an active layer; depositing a metal layer (Mo can be deposited, and 200nm is deposited), and forming a source drain metal layer in a patterning mode, wherein the source drain metal layer comprises a source electrode, a drain electrode and a data line; depositing a passivation layer (which can be SiO2300nm deposited); depositing a pixel electrode (ITO can be deposited, 40nm is deposited), and patterning; finally, the acrylic material is deposited by spin coating, and the pixel defining layer is formed by photoetching and curing, and the thickness of the pixel defining layer is about 1.5 um. To this end, pixels of an array are formed on a transparent substrate.
Processing the surface of the pixel by using plasma; further thermally evaporating and evaporating organic materials (sequentially forming a hole injection layer, a hole transport layer, a light emitting layer, an electron transport layer and an electron injection layer) in an OLED/EL-organic metal thin film deposition high vacuum system, wherein the whole thickness of the organic materials is 100-300 nm; and then evaporating a cathode metal thin layer, wherein the cathode can adopt LiF, Al layers and the like, is about 500-1000nm, and packaging and cutting are carried out after evaporation is finished, so that the manufacturing of the organic light-emitting diode display panel is completed. The Al layer is formed by depositing a LiF film on the Al film, wherein the thickness of the LiF film is about 0.8 nm. LiF films are mainly used to enhance electron injection.
And 20, forming a prism layer. Wherein the prism layer includes a plurality of prism structures forming a plurality of concave surfaces corresponding to the pixels.
And step 30, forming the cholesteric liquid crystal grating.
Specifically, the step 20 specifically includes: cleaning a lower substrate by adopting a standard method, depositing metal Mo, depositing for 200nm, and patterning to form an alignment pattern; depositing an insulating layer (SiO 2 can be deposited, 150nm is deposited); depositing a pixel electrode (ITO can be deposited, and the deposition is 60 nm); after the upper substrate is cleaned by adopting a standard method, a common electrode (which can be ITO (indium tin oxide) is deposited, and 60nm is deposited), then the upper substrate and the lower substrate are subjected to an orientation friction process, cholesteric liquid crystal is filled, the upper substrate and the lower substrate are subjected to box matching and cutting, and the cholesteric liquid crystal grating is formed.
Circular polarizers matched with the rotation of cholesteric liquid crystal light are attached to an upper substrate and a lower substrate of the optical modulator. Specifically, if the cholesteric liquid crystal is a left-handed liquid crystal, and the light passes through the cholesteric liquid crystal and then turns right, the circular polarizer is a left optical rotation sheet; if the cholesteric liquid crystal is a right-handed liquid crystal, correspondingly, the circular polarizer is a right-handed polarizer.
Preferably, the cholesteric liquid crystal may be a broad-spectrum cholesteric liquid crystal. That is, the wavelength range of the reflected light of the cholesteric liquid crystal is wide, and light having different wavelengths can be reflected.
And step 40, attaching the prism layer to the organic light-emitting diode display panel, then attaching the organic light-emitting diode display panel to the cholesteric liquid crystal grating, and binding the circuit.
Aligning and laminating the organic light-emitting diode display panel and the cholesteric liquid crystal grating according to the alignment patterns of the organic light-emitting diode display panel and the cholesteric liquid crystal grating; and then binding flexible circuit boards such as a driving circuit and the like, and debugging the program to form a final complete module.
It should be noted that there are various types and manufacturing methods of the organic light emitting diode display panel and the cholesteric liquid crystal grating, and the embodiment of the present invention is described in detail only by taking the above manufacturing method as an example, and the embodiments of the present invention are not always described by combining other types of display panels and cholesteric liquid crystal gratings with the existing manufacturing method and referring to the above manufacturing method.
The embodiment of the invention provides a driving method of a display device, which comprises the following steps:
driving a display panel to sequentially display n continuous sub-frame pictures in a frame picture;
the n light modulation areas for driving the light modulation units are light transmission areas in the n sub-frame pictures in sequence, the other n-1 light modulation areas are light shading areas, the light shading light modulation areas can reflect light, and n is a positive integer greater than or equal to 2.
Specifically, the display device may drive the display panel to sequentially display n consecutive sub-frame pictures in one frame picture through the first driving module; the second driving module drives n light modulation areas of the light modulation unit to be light transmission areas in the n sub-frame pictures in sequence, and the other n-1 light modulation areas are light shading areas. Specifically, the first driving module and the second driving module may be the same module, which may perform multiple functions. Or may be different driver modules each performing its own function. In fig. 1, the first driving module 30 and the second driving module 40 are two different driving modules, respectively. It should be noted here that although the first driving module and the second driving module have different functions, in the display device, the first driving module and the second driving module must be driven in coordination so that n light modulation regions that drive the light modulation units are light-transmitting regions in the n subframes in sequence, and the other n-1 light modulation regions are light-shielding regions.
As shown in fig. 5, the pixel includes 3 virtual pixels, i.e., a first virtual pixel 111, a second virtual pixel 113, and a third virtual pixel 113. The light modulation unit includes 3 light modulation regions, i.e., a first light modulation region 211, a second light modulation region 212, and a third light modulation region 213, which correspond one-to-one to 3 virtual pixels of a pixel, as shown in fig. 6. The first driving module drives the display panel to sequentially display 3 continuous sub-frame pictures in the frame picture, and 3 virtual pixels of the light modulation unit only have one light transmission part in each sub-frame and the other two light shading parts. Specifically, as shown in fig. 7, when the display panel displays a first sub-frame picture, the first light modulation region corresponding to the first virtual pixel 111 transmits light, and the second light modulation region 212 and the third light modulation region 213 shield light; when the display panel displays a second subframe picture, the second light modulation area corresponding to the second virtual pixel 112 is transparent, and the first light modulation area 211 and the third light modulation area 213 are light-shielded; when the display panel displays a third subframe picture, the third light modulation region corresponding to the third virtual pixel 113 transmits light, and the first light modulation region 211 and the second light modulation region 212 shield light. In the case where the pixel includes 3 dummy pixels, as shown in fig. 8, the concave surface includes a first inclined surface 51, a second inclined surface 52, and a parallel surface 53. The optical modulator reflects part of light rays in the shading area into the prism structure, and the part of light rays are emitted from the light-transmitting area through reflection and refraction of the prism structure, so that the light-emitting brightness of the light-transmitting area is further improved.
Here, the driving frequency of the conventional display panel is 60Hz, that is, 60 frames of pictures are displayed in one second, and since one pixel of the conventional display panel is completely an effective display pixel in one frame of pictures, the display time of one frame of pictures is 1/60 s; in case that the pixels include 3 dummy pixels, the driving frequency of the display panel may be 180Hz, that is, 180 frames of pictures are displayed one second, the display time of one sub-frame of pictures is 1/180s, and the display time of one frame of pictures is 1/60 s.
In the embodiment of the invention, the display panel sequentially displays n continuous sub-frame pictures in one frame picture, n light modulation areas of the light modulation unit are light transmission areas in the n sub-frame pictures in sequence, and the other n-1 light modulation areas are light shading areas, namely, the display panel displays any one sub-frame display picture, the light modulation area corresponding to one virtual pixel of the pixel is light transmission, the virtual pixel realizes display, and the other virtual pixels are not effective pixels due to the light shading of the light modulation areas. Compared with the existing display, the method has the advantages that one frame of display picture is divided into a plurality of sub-frame pictures to be displayed respectively, a user feels the improvement of the display resolution visually, and compared with the traditional method for changing the manufacturing process of the display panel and reducing the pixel area to improve the display resolution, the method for improving the display resolution can improve the visual display resolution without improving the manufacturing method of the display panel, so that the process difficulty and the cost for realizing high-resolution display are greatly reduced. And the optical modulator reflects part of light rays in the shading area into the prism structure, and the part of light rays are emitted from the light-transmitting area through reflection and refraction of the prism structure, so that the light-emitting brightness of the light-transmitting area can be improved.
Optionally, the pixel includes two virtual pixels, and the light modulation unit includes two light modulation regions respectively corresponding to the virtual pixels; the frame picture includes two sub-frame pictures, and two light modulation areas driving the light modulation unit are light transmission areas in sequence in the first sub-frame picture, and the other light modulation area is a light shading area, and the method specifically includes:
when the display panel is driven to display a first subframe picture in a frame picture, two light modulation areas of the light modulation unit are driven to be a light-transmitting area and a light-shielding area respectively;
when the display panel is driven to display a second subframe picture in a frame picture, the light transmittance of each light modulation area of the light modulation unit is driven to be opposite to that of the light modulation area when the display panel displays the first subframe picture.
As shown in fig. 9, the pixel 11 includes two virtual pixels, i.e., the pixel includes a first virtual pixel 111 and a second virtual pixel 112. It should be noted that the positions of the first virtual pixel and the second virtual pixel in each pixel may be variable, fig. 9 is an example, and the embodiment of the present invention is described in detail only by taking the example shown in fig. 9 as an example. As shown in fig. 10, the light modulation unit 21 includes two light modulation regions corresponding to the dummy pixels 11, respectively, i.e., the light modulation unit 21 includes a first light modulation region 211 and a second light modulation region 212. The first light modulation region 211 corresponds to the first dummy pixel 111, and the second light modulation region 212 corresponds to the second dummy pixel 112. Of course, the first light modulation region may correspond to the second virtual pixel, and then the second light modulation region may correspond to the first virtual pixel.
As shown in fig. 11, when the first driving module 30 drives the display panel 10 to display a first sub-frame picture in a frame picture, the second driving module 40 drives the first light modulation region 211 of the light modulation unit 21 to be a light-transmitting region, and the second light modulation region 212 to be a light-shielding region, at this time, as shown in fig. 12, since the cholesteric liquid crystal has a function of reflecting light, light of the second light modulation region 212 is reflected by the cholesteric liquid crystal to enter the prism layer 50, and finally, light is reflected and/or refracted by the prism structure of the prism layer 50 and is emitted from the first light modulation region 211, i.e., the light-transmitting region; when the first driving module 30 drives the display panel 10 to display a second sub-frame picture in a frame picture, the second driving module 40 drives the first light modulation region 211 of the grating 21 to be a light-shielding region and the second light modulation region 212 to be a light-transmitting region, at this time, as shown in fig. 12, since the cholesteric liquid crystal has a function of reflecting light, the light of the first light modulation region 211 is reflected by the cholesteric liquid crystal to enter the prism layer 50, and finally, the light is reflected and/or refracted by the prism structure of the prism layer 50 to be emitted from the second light modulation region 212, i.e., the light-transmitting region. At this time, the driving frequency of the display panel may be 120 Hz. The existing sub-frame picture is displayed respectively after being multiplied by two sub-frame pictures, so that a user visually feels the improvement of the display resolution, and the optical modulator reflects part of light rays in the shading area into the prism structure, so that part of the light rays are emitted from the light transmission area through reflection and refraction of the prism structure, and the light emitting brightness of the light transmission area is improved.
The virtual pixels of the optional display panel are arranged in an array form; when the first driving module drives the display panel to display a first sub-frame picture in a frame picture, the second driving module is specifically used for driving two arbitrarily adjacent light modulation regions in each row and/or two arbitrarily adjacent light modulation regions in each column of the light modulation unit to be a light transmitting region and a light shielding region respectively.
Specifically, if the optical modulator includes the strip light valves disposed in each row of the light modulation regions, that is, one light modulation unit is a strip light valve corresponding to one row of pixels, one strip light valve controls one row of the light modulation regions to transmit light or shield light. As shown in fig. 11, taking an example that the light modulation unit includes two light modulation regions, when the first driving module drives the display panel to display a first sub-frame picture in a frame picture, the second driving module drives any one row of light modulation regions to be transparent, and the adjacent row of light modulation regions is shielded, at this time, the light transmission of the light modulation regions in the same row is the same, and the light transmission of any two adjacent rows of light modulation regions is opposite, and any two adjacent light modulation regions in each column are respectively a transparent region and a shielded region.
In addition, in the case that the optical modulator includes the strip light valves disposed in each row of the light modulation regions, as shown in fig. 14, two strip light valves may also be used to make two adjacent rows of the light modulation regions (i.e. corresponding to two strip light valves 22) in two adjacent rows of pixels be light-shielding regions, where fig. 14a is a schematic diagram of two adjacent rows of pixels, and fig. 14b is a schematic diagram of two adjacent rows of the light modulation regions in two adjacent rows of pixels being light-shielding regions, that is, two strip light valves respectively control two adjacent rows of the light modulation regions in two adjacent pixels. Alternatively, as shown in fig. 15, one bar-shaped light valve 22 may correspond to two adjacent light modulation regions in two adjacent rows of virtual pixels, that is, one bar-shaped light valve controls two rows of light modulation regions, so that two adjacent rows of light modulation regions (that is, corresponding to one bar-shaped light valve 22) in two adjacent rows of pixels are both light-shielding regions.
If the optical modulator includes strip-shaped light valves disposed in each row of light modulation regions, that is, one light modulation unit is a strip-shaped light valve corresponding to one row of pixels, one strip-shaped light valve controls one row of light modulation regions to transmit light or shield light, as shown in fig. 14. When the first driving module drives the display panel to display a first sub-frame picture in a frame picture, the second driving module is used for enabling any row of light modulation regions to be transparent and enabling the adjacent row of light modulation regions to be light-proof, at the moment, the light transmission of the light modulation regions in the same row is the same, and any two adjacent light modulation regions in each row are respectively a transparent region and a light-proof region. And under the condition that the optical modulator comprises the strip-shaped light valve arranged in each row of light modulation regions, two adjacent rows of light modulation regions can be both light-shielding regions, and two adjacent rows of light modulation regions are both light-transmitting regions. Alternatively, the stripe light valve may be made to correspond to two adjacent light modulation regions in adjacent columns of virtual pixels, as shown in fig. 15.
Or, the optical modulator may further include a light valve disposed in each light modulation region, and in a case where the light modulation units correspond to the virtual pixels one to one, each light modulation unit transmits or blocks light through one light valve controller, so that any one of the virtual pixels on the display panel may be controlled to display an image or not display an image. And in the case that the optical modulator includes a light valve disposed in each light modulation region, by controlling each light valve, it is also possible to implement the interval arrangement of the light transmission region and the light shielding region corresponding to any two adjacent pixels as shown in fig. 13, that is, any two adjacent light modulation regions in each row and any two adjacent light modulation regions in each column are the light transmission region and the light shielding region, respectively, so as to generate visual compensation in space, so as to improve the display effect.
The above description is only for the specific embodiments of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can easily conceive of the changes or substitutions within the technical scope of the present invention, and all the changes or substitutions should be covered within the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the appended claims.
Claims (16)
1. A display device, comprising a display panel, a first driving module, a second driving module, and an optical modulator located at the light-emitting side of the display panel, wherein a plurality of prism structures are formed between the display panel and the optical modulator, the display panel comprises a plurality of pixels, the pixels comprise n virtual pixels, the optical modulator comprises a plurality of light modulation units corresponding to the pixels, and the light modulation units comprise: n light modulation regions respectively corresponding to the dummy pixels; one frame of picture comprises n sub-frame pictures;
the first driving module is used for driving the display panel to sequentially display n continuous sub-frame pictures in one frame picture;
the second driving module is used for driving n light modulation areas of the light modulation unit to be light transmission areas in n sub-frame pictures in sequence, the other n-1 light modulation areas are light shielding areas, the optical modulator reflects part of light rays of the light shielding areas into the prism structure, so that the part of light rays are emitted from the light transmission areas, wherein n is a positive integer greater than or equal to 2.
2. A display device as claimed in claim 1, characterized in that the optical modulator is a cholesteric liquid crystal grating comprising a cholesteric liquid crystal panel and a polarizing-film layer on both sides of the cholesteric liquid crystal panel;
under the condition that the cholesteric liquid crystal is levorotatory liquid crystal, the polarizing film layer is used for enabling the light entering the cholesteric liquid crystal panel to be levorotatory and circularly polarized light; or,
and under the condition that the cholesteric liquid crystal is right-handed liquid crystal, the polarizing film layer is used for enabling the light entering the cholesteric liquid crystal panel to be right-handed circularly polarized light.
3. The display device according to claim 2, wherein the polarizing film layer is a circularly polarizing plate.
4. The display device of claim 1, wherein the plurality of prismatic structures form a prismatic layer, the prismatic layer comprising a plurality of concave faces, the concave faces corresponding to the pixels.
5. The display device according to any one of claims 1 to 4, wherein the pixel comprises two virtual pixels, the light modulation unit comprises two light modulation regions respectively corresponding to the virtual pixels, and one frame of picture comprises two sub-frame pictures;
when the first driving module drives the display panel to display a first sub-frame picture in a frame picture, the second driving module is specifically used for driving two light modulation areas of the light modulation unit to be a light-transmitting area and a light-shielding area respectively;
when the first driving module drives the display panel to display a second sub-frame picture in a frame picture, the second driving module is specifically configured to drive the light transmittance of each light modulation region of the light modulation unit to be opposite to the light transmittance of the light modulation region when the display panel displays the first sub-frame picture.
6. The display device according to claim 5, wherein the dummy pixels of the display panel are arranged in an array;
when the first driving module drives the display panel to display a first sub-frame picture in a frame picture, the second driving module is specifically used for driving two arbitrarily adjacent light modulation regions in each row and/or two arbitrarily adjacent light modulation regions in each column to be a light transmission region and a light shielding region respectively.
7. The display device of claim 5, wherein the concave face comprises two inclined faces, the two mirrored inclined faces corresponding to the light modulating area.
8. A display device as claimed in claim 7, characterised in that the angle between the two mirrored inclined surfaces is 30 ° -150 °.
9. The display device according to claim 1, wherein the optical modulator comprises: and the light valve is arranged in each light modulation area and used for controlling the light transmission or shading of the light modulation areas.
10. The display device according to claim 1, wherein the optical modulator comprises: the strip-shaped light valves are arranged in each row of the light modulation area or each column of the light modulation area; or,
the optical modulator includes: the light modulation device comprises strip-shaped light valves arranged in two adjacent rows of light modulation areas or two adjacent columns of light modulation areas, wherein the two adjacent rows of light modulation areas correspond to two adjacent rows of pixels respectively, and the two adjacent columns of light modulation areas correspond to two adjacent columns of pixels respectively.
11. The display device according to claim 2, further comprising a touch electrode for detecting a touch position.
12. The display device according to claim 11, wherein the cholesteric liquid crystal panel comprises an upper substrate, a lower substrate, and cholesteric liquid crystal between the upper substrate and the lower substrate, the touch driving electrodes and the touch sensing electrodes are disposed on the upper substrate, or the touch driving electrodes and the touch sensing electrodes are disposed on the lower substrate, or the touch driving electrodes and the touch sensing electrodes are disposed on the upper substrate and the lower substrate, respectively.
13. The display device according to claim 1, wherein the display panel is an organic light emitting diode display panel.
14. A driving method of a display device according to any one of claims 1 to 13, comprising:
driving the display panel to sequentially display n continuous sub-frame pictures in one frame picture;
the n light modulation areas for driving the light modulation units are light transmission areas in the n sub-frame pictures in sequence, the other n-1 light modulation areas are light shading areas, the light shading light modulation areas can reflect light, and n is a positive integer greater than or equal to 2.
15. The driving method according to claim 14, wherein the pixel includes two dummy pixels, one frame of picture includes two sub-frame pictures, and the light modulation unit includes two light modulation regions respectively corresponding to the dummy pixels;
the display panel is driven to sequentially display n continuous sub-frame pictures in one frame picture; the n light modulation areas for driving the light modulation unit are light transmission areas in n sub-frame pictures in sequence, and the other n-1 light modulation areas are light shading areas, and the method specifically comprises the following steps:
when the display panel is driven to display a first subframe picture in a frame picture, two light modulation areas for driving the light modulation unit are respectively a light transmitting area and a light shading area;
when the display panel is driven to display a second subframe picture in a frame picture, the light transmittance of each light modulation area of the light modulation unit is driven to be opposite to that of the light modulation area when the display panel displays the second subframe picture.
16. The driving method as claimed in claim 15, wherein the dummy pixels of the display panel are arranged in an array;
when the display panel is driven to display a first sub-frame picture in a frame picture, driving two randomly adjacent light modulation areas of each row and/or two randomly adjacent light modulation areas of each column of the light modulation unit to be a light transmitting area and a light shading area respectively.
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