CN106444200B

CN106444200B - Transparent display device and display method

Info

Publication number: CN106444200B
Application number: CN201611053532.7A
Authority: CN
Inventors: 钟杰兴
Original assignee: BOE Technology Group Co Ltd
Current assignee: BOE Technology Group Co Ltd
Priority date: 2016-11-24
Filing date: 2016-11-24
Publication date: 2020-05-05
Anticipated expiration: 2036-11-24
Also published as: CN106444200A

Abstract

The embodiment of the invention provides a transparent display device and a display method, relates to the technical field of display, and can realize high light penetrability by adopting polymer stabilized liquid crystal under the condition of not applying an electric field. This transparent display device includes display module assembly and light source, and display module assembly includes at least one and shows the submodule group, shows the submodule group and includes: the liquid crystal display panel comprises a liquid crystal layer, a pixel electrode and a common electrode, wherein the liquid crystal layer is positioned between two substrate substrates, and the pixel electrode and the common electrode are used for driving the liquid crystal layer; the display module divides a plurality of pixel units; the pixel units are transparent, and/or an external light transmission area is arranged between every two adjacent pixel units. The light source is positioned on the side surface of each display sub-module and used for emitting light to the liquid crystal layer.

Description

Transparent display device and display method

Technical Field

The invention relates to the technical field of display, in particular to a transparent display device and a display method.

Background

With the development of display technologies, various display technologies are emerging, wherein transparent display technologies are receiving more and more attention due to the light transmission characteristics of display panels. The transparent display device has certain light penetrability, so that not only can pictures be displayed on the display screen, but also the background behind the display screen can be observed through the display screen, and the transparent display device is more suitable for building windows, automobile windows, shop windows and the like.

A transparent display device in the prior art generally includes a display area and a transparent area, wherein the display area is used for displaying different preset pictures according to needs, and the transparent area can maintain a transparent state by applying a voltage. For most of the usage scenarios of the transparent display device, the transparent display device is required to be in a transparent state no matter in a picture display stage or a picture non-display stage, and the transparent region of the existing transparent display device needs to be maintained in the transparent state by applying a voltage, so that the energy consumption of the whole device is too large.

Disclosure of Invention

Embodiments of the present invention provide a transparent display device and a display method, so as to solve a problem that a transparent region of the transparent display device needs to be maintained in a transparent state by applying a voltage, which results in excessive power consumption.

In order to achieve the above purpose, the embodiment of the invention adopts the following technical scheme:

an embodiment of the present invention provides a transparent display device, including: the display module assembly, the display module assembly includes at least one display sub-module assembly, the display sub-module assembly includes: the liquid crystal display panel comprises a liquid crystal layer, a pixel electrode and a common electrode, wherein the liquid crystal layer is positioned between two substrate substrates, and the pixel electrode and the common electrode are used for driving the liquid crystal layer; the display module is divided into a plurality of pixel units; the pixel units are transparent, and/or an external light transmission area is arranged between every two adjacent pixel units; and the light sources are positioned on the side surfaces of the display sub-modules and used for emitting light rays to the liquid crystal layer.

Furthermore, the display module comprises a first display sub-module and a second display sub-module which are arranged in a stacked manner, the first display sub-module is divided into first sub-pixels, the second display sub-module is divided into second sub-pixels, and the first sub-pixels and the second sub-pixels form the pixel unit; the light source located on the side face of the first display sub-module emits first primary color light, and the light source located on the side face of the second display sub-module periodically and sequentially emits at least second primary color light and third primary color light.

Further, the projection of the first sub-pixel in the pixel unit on the substrate base plate has a hollow-out region, and the projection of the second sub-pixel on the substrate base plate is located in the hollow-out region.

Further, the projection of the second sub-pixel on the substrate base plate is the same as or approximately the same as the shape and size of the hollow-out area.

Further, the projection of the first sub-pixel on the substrate base plate is in a rectangular ring shape or a regular hexagonal ring shape.

Furthermore, the display module comprises a display sub-module, and the light source periodically emits at least first primary color light, second primary color light and third primary color light in sequence.

Furthermore, the display module comprises a first display sub-module, a second display sub-module and a third display sub-module which are arranged in a stacked mode; the light source located on the side face of the first display sub-module emits first primary color light, the light source located on the side face of the second display sub-module emits second primary color light, and the light source located on the side face of the third display sub-module emits third primary color light.

Furthermore, the pixel electrode and the common electrode in the display sub-module are located on two sides of the liquid crystal layer.

Further, under the condition that the display module comprises two display sub-modules which are arranged in a stacked mode, pixel electrodes of the two display sub-modules are located between the two liquid crystal layers of the two display sub-modules.

In another aspect, an embodiment of the present invention further provides a display method of the foregoing transparent display apparatus including two display sub-modules, where the method includes: synchronously scanning a first sub-pixel of the first display sub-module and a second sub-pixel in the second display sub-module line by line; controlling a light source on the side surface of the first display sub-module to emit first primary color light, and controlling a light source on the side surface of the second display sub-module to periodically and sequentially emit at least second primary color light and third primary color light; when a row of pixel units formed by the first sub-pixel and the second sub-pixel is scanned, an electric signal is applied to the pixel electrode of the first sub-pixel according to the first primary color gray value of each pixel in the row, when the light source on the side of the second display sub-module emits second primary color light, an electric signal is applied to the pixel electrode of the second sub-pixel according to the second primary color gray value of each pixel in the row, when the light source on the side of the second display sub-module emits third primary color light, an electric signal is applied to the pixel electrode of the second sub-pixel according to the third primary color gray value of each pixel in the row, and therefore the pixel electrode and the common electrode in each pixel in the row form an electric field for driving the liquid crystal layer.

The embodiment of the invention provides a transparent display device and a display method, wherein the display device comprises a display module and a light source, wherein the display module comprises at least one display sub-module, the display sub-module comprises a liquid crystal layer positioned between two substrate substrates, a pixel electrode and a common electrode, the pixel electrode and the common electrode are used for driving the liquid crystal layer, and the liquid crystal layer is mainly composed of polymer stabilized liquid crystal; the display module divides a plurality of pixel units; the pixel units are transparent, and/or an external light transmission area is arranged between every two adjacent pixel units. The light source is positioned on the side surface of each display sub-module and used for emitting light to the liquid crystal layer.

In this case, the liquid crystal layer is equivalent to a waveguide layer, light emitted by the light source is coupled into the liquid crystal layer, and signals are applied to the pixel electrode and the common electrode to drive liquid crystal in the liquid crystal layer to be arranged in a disordered manner, so that the light coupled into the liquid crystal layer is output through the position where the liquid crystal is arranged in the disordered manner, and the light output quantity at the position is controlled by adjusting the magnitude of the signals applied to the pixel electrode and the common electrode, thereby realizing picture display with different gray scales. In addition, the liquid crystal layer is composed of polymer stabilized liquid crystal, when an electric field is not applied, the polymer stabilized liquid crystal is aligned, and the liquid crystal layer has high light transmittance, so that the liquid crystal layer in a non-picture display area can keep high light transmittance under the condition of not applying the electric field, and further the transparent display device can realize transparent display and greatly reduce energy consumption.

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. 1a is a schematic structural diagram of a transparent display device including a display sub-module according to an embodiment of the present invention;

FIG. 1b is a schematic structural diagram of another transparent display device including a display sub-module according to an embodiment of the present invention;

fig. 2 is a schematic structural diagram of a transparent display device including three display sub-modules according to an embodiment of the present invention;

fig. 3 is a schematic structural diagram of a transparent display device including two display sub-modules according to an embodiment of the present invention;

fig. 4a is a schematic plan view illustrating a transparent display device according to an embodiment of the present invention;

FIG. 4b is a schematic cross-sectional view of FIG. 4a at a location C-C';

fig. 5a is a schematic plan view illustrating another transparent display device according to an embodiment of the present invention;

FIG. 5b is a schematic plan view illustrating a transparent display device according to an embodiment of the present invention;

fig. 6 is a schematic structural diagram of another transparent display device according to an embodiment of the present invention;

fig. 7 is a flowchart illustrating a display method of another transparent display device according to an embodiment of the present invention.

Reference numerals: 10-a display module; 100-a display sub-module; 101-a first display sub-module; 102-a second display sub-module; 103-a third display sub-module; 200-a substrate base plate; 201-a liquid crystal layer; 202-pixel electrodes; 203-common electrode; 300-pixel cells; 301-a first subpixel; 302-a second subpixel; 303-a third subpixel; 20-a light source; 21-a first sub-light source; 22-a second sub-light source; 23-third sub-light source.

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 transparent display device, as shown in fig. 1a, the transparent display device includes: display module assembly 10 and light source 20, wherein, display module assembly 10 includes at least one display sub-module 100, and this display sub-module 100 includes: the light source 20 is located on the side of each display sub-module 100 and is used for emitting light to the liquid crystal layer 201, at this time, the liquid crystal layer 200 is equivalent to a waveguide layer, the light emitted by the light source 20 is coupled into the whole liquid crystal layer 200 and is applied with signals on the pixel electrode 202 and the common electrode 203 to drive the liquid crystal in the liquid crystal layer 200 to be disorderly arranged, so that the light coupled into the liquid crystal layer 200 is output through the disordered arranged position of the liquid crystal, and the light output quantity at the position is controlled by adjusting the magnitude of the signals applied on the pixel electrode 202 and the common electrode 203, thereby realizing the picture display with different gray scales.

In addition, as shown in fig. 1a, the display module 10 is divided into a plurality of pixel units 300, wherein the pixel units 300 are transparent, and/or an external light transmission area a is provided between every two adjacent pixel units 300, so that an object behind the display screen can be viewed through the display screen while displaying a picture, that is, the purpose of transparent display is achieved.

Meanwhile, the liquid crystal layer 201 is mainly composed of polymer stabilized liquid crystal, and since the liquid crystal layer 201 is composed of polymer stabilized liquid crystal, when no electric field is applied, the polymer stabilized liquid crystal is aligned, and the liquid crystal layer 201 has high light transmittance, so that the liquid crystal layer 201 in a non-picture display area can maintain high light transmittance under the condition of not applying the electric field, and further, the transparent display device can realize transparent display and greatly reduce energy consumption.

It should be noted here that the skilled person should understand that: the pixel unit 300 is the minimum repeating unit for displaying in the display module 10, and the boundary of a pixel unit 300 can be determined by the area of the liquid crystal layer 201 that can be driven in the minimum repeating unit, which means that the boundary of a pixel unit 300 is determined by the shape and size of the pixel electrode in the minimum repeating unit, or by the shape and size of the pixel electrode and the common electrode in the minimum repeating unit.

The specific arrangement of the display module 10 to define a plurality of pixel units 300, wherein the pixel units 300 are transparent and/or each adjacent pixel unit 300 has an ambient light transmission area a therebetween, will be further described below.

For example, in the case where the pixel unit 300 is transparent, as shown in fig. 1a, an external light transmission region a may be disposed between each adjacent pixel unit 300.

In this case, since the external light transmission region a is disposed between the adjacent pixel units 300, the width of the external light transmission region a (including the dimension of the external light transmission region a in the width direction of the data line and the dimension of the external light transmission region a in the width direction of the gate line) is generally selected to be significantly larger than the width of the data line and the gate line, so as to ensure the transmission of the external light, and thus the display device can achieve a transparent display effect when displaying any picture.

For another example, when the pixel units 300 are transparent, as shown in fig. 1b, the external light transmission region a is not disposed between every two adjacent pixel units 300, that is, when the gaps between the adjacent pixel units 300 at the corresponding positions of the data lines and the gate lines are neglected, the display module 10 is divided into all the pixel units 300, and the adjacent pixel units 300 in the display module 10 are disposed adjacent to each other.

In this case, all the pixel units 300 in the display module 10 are disposed closely, on one hand, in the area where no picture is displayed, the liquid crystal layer itself exhibits high light transmittance, and the purpose of transparent display can be achieved; on the other hand, for the region of the display picture, the position with light picture color, the external partial light can penetrate through, and the region of the display picture also has a certain perspective effect; in addition, in the transparent display device of this arrangement mode, since all the pixel units 300 in the display module 10 are arranged in close proximity, the resolution of the display device is relatively high, and the quality of the display image is good.

For another example, the pixel unit 300 may be opaque, but a portion above the liquid crystal layer 200 should be transparent to enable light from the liquid crystal layer 200 to normally exit, for example, in a TN (twisted Nematic) panel in fig. 1a, the pixel electrode 202 may be selected to be opaque, the common electrode 203 may be transparent to enable light in the liquid crystal layer 201 to normally exit, and in this case, since the position of the pixel unit 300 is opaque, a see-through effect cannot be achieved at the position, an external light transmission area a must be ensured between every two adjacent pixel units 300 to ensure that transparent display is achieved. In this case, the pixel electrode 202 preferably has a reflective property, and may be made of a metal material, for example.

In summary, in consideration of the light transmittance of the entire transparent display device and the resolution of the display device to ensure the quality of the display image, it is preferable that, as shown in fig. 1b, the pixel units 300 are transparent, and no ambient light transmission region a is disposed between every two adjacent pixel units 300.

In addition, the following description will further describe the installation situation of the display sub-module 100 in the display module 10 by using specific embodiments.

Example one

As shown in fig. 1b, the display module 10 only includes one display sub-module 100, in this case, the light source 20 periodically emits at least a first primary color light, a second primary color light, and a third primary color light in sequence, so as to ensure that the display module can realize the display of a color image, rather than the monochrome display. The first primary color light can be red light, the second primary color light can be green light, and the third primary color light can be blue light; other primary color light may be included, such as white light, yellow light, etc., without limitation.

It should be noted that the light source 20 periodically and sequentially emits at least a first primary color light, a second primary color light and a third primary color light, the light source 20 may be three independent light emitting devices, schematically, as shown in fig. 1b, the light source 20 may include a first sub-light source 21, a second sub-light source 22 and a third sub-light source 23, and the first primary color light, the second primary color light and the third primary color light are periodically and sequentially emitted by the first sub-light source 21, the second sub-light source 22 and the third sub-light source 23 through a time-sequential control. Of course, the light source 20 may be an integrated light emitting device, which emits the first primary color light, the second primary color light, and the third primary color light in sequence by controlling periodically.

On this basis, in order to improve the utilization rate of Light, it is preferable that the Light source 20 is a collimated Light source, specifically, the collimated Light source may be made of a semiconductor laser chip, or may be made of a Light Emitting Diode (LED) chip after being collimated and expanded, which is not limited in the present invention.

In addition, in the case of using one display sub-module 100, the display module 10 in the transparent display device needs to display the red, green, and blue sub-images in time series by using a Field Sequential Color (FSC) method, and to present a full-Color image on the retina by a time-Color mixing method by using persistence of human vision.

On the basis, when a full-Color picture is presented on the retina by a time Color mixing method by using the persistence of human vision, the human vision and the picture have a relative speed, so that the three sub-pictures can not be completely overlapped on the retina, the edge has a Color dislocation phenomenon, and a Color Break (CBU) phenomenon is generated through persistence of vision integration.

In addition, in the case of the display sub-module 100, the red sub-pixel, the green sub-pixel and the blue sub-pixel are the same sub-pixel, and different light beams are emitted by the time-sequentially controlled light sources, and the sub-pixels can emit three primary colors to display the red, green and blue sub-images in a time-sequential manner, in this case, the pixel unit 300 includes one sub-pixel.

Example two

As shown in fig. 2, the display module 10 includes a first display sub-module 101, a second display sub-module 102, and a third display sub-module 103, which are stacked. The light source 20 located on the side of the first display sub-module 101 emits a first primary color light, the light source 20 located on the side of the second display sub-module 102 emits a second primary color light, and the light source 20 located on the side of the third display sub-module 103 emits a third primary color light.

It should be noted that the light emitting device that emits the light of the first primary color on the side of the first display sub-module 101, the light emitting device that emits the light of the second primary color on the side of the second display sub-module 102, and the light emitting device that emits the light of the third primary color on the side of the third display sub-module 103 may be three independent light emitting devices, schematically illustrated as the first sub-light source 21, the second sub-light source 22, and the third sub-light source 23 shown in fig. 2. Or may be an integrated one-piece light emitting device, which is not limited in this respect.

Of course, similar to the Light source 20 in the first embodiment, in order to improve the utilization rate of Light, it is preferable that the Light source 20 is a collimated Light source, specifically, the collimated Light source may be made of a semiconductor laser chip, or may be made of a Light Emitting Diode (LED) chip after being collimated and expanded, which is not limited in the present invention.

It should be further noted that, compared with the first embodiment in which only one display sub-module 100 is adopted, the third display sub-module 100 is arranged in a stacked manner in the present embodiment, which avoids adopting a field color sequential method to display red, green and blue sub-images in a time sequence, and does not cause color separation, and meanwhile, the requirement for the response speed of the display device is reduced, but the thickness of the display device is greatly increased by the arrangement mode, and thus the color mixture phenomenon with large viewing angle is easily caused.

In addition, in the case of three display sub-modules 100, namely, the first display sub-module 101, the second display sub-module 102, and the third display sub-module 103, the first sub-pixel 301 in the first display sub-module 101 emits a first primary color light, such as a red light; the second sub-pixel 302 in the second display sub-module 102 emits a second primary color light, such as green light; the third sub-pixel 303 in the third display sub-module 103 emits light of a third primary color, such as blue light. In this case, the first sub-pixel 301, the second sub-pixel 302, and the third sub-pixel 303 respectively emit one of the three primary colors, and as shown in fig. 2, the boundary of the pixel unit 300 may be the outer boundary of the whole of the first sub-pixel 301, the second sub-pixel 302, and the third sub-pixel 303.

EXAMPLE III

As shown in fig. 3, the display module 10 includes a first display sub-module 101 and a second display sub-module 102 stacked one on another, the first display sub-module 101 defines a first sub-pixel 301, and the second display sub-module 102 defines a second sub-pixel 302, wherein the first sub-pixel 301 and the second sub-pixel 302 form a pixel unit 300.

Wherein, the light source 20 located at the side of the first display sub-module 101 emits a first primary color light, which may be a red light; the light source 20 located at the side of the second display sub-module 102 periodically emits at least a second primary color light and a third primary color light in sequence, where the second primary color light may be green light, the third primary color light may be blue light, and of course, the light source may also include a fourth primary color light, and the fourth primary color light may be white light or yellow light, which is not limited in the present invention.

It should be noted that the light emitting device located on the side surface of the first display sub-module 101 and the light emitting device located on the side surface of the second display sub-module 102 may be independent light emitting devices of different primary colors, or may be an integrated light emitting device, which is not limited in this respect.

Of course, similar to the Light source 20 in the first and second embodiments, in order to improve the utilization rate of Light, it is preferable that the Light source 20 is a collimated Light source, specifically, the collimated Light source may be made of a semiconductor laser chip, or may be made of a Light Emitting Diode (LED) chip after being collimated and expanded, which is not limited in the present invention.

On this basis, the first subpixel 301 emits light of a first primary color, for example, red light; the second sub-pixel 302 periodically emits light of the second primary color and light of the third primary color, such as green light and blue light, in turn, i.e. the first sub-pixel 301 and the second sub-pixel 302 emit three primary colors, in this case, as shown in fig. 3, the boundary of the pixel unit 300 may be defined by the outer boundary of the whole of the first sub-pixel 301 and the second sub-pixel 302.

In addition, compared with the embodiment that only one display sub-module 100 is adopted, a field color sequential method is required to display three sub-pictures of red, green and blue in a time sequence; in this embodiment, two display sub-modules 100 (a first display sub-module 101 and a second display sub-module 102) are adopted, and only the second display sub-module 102 adopts a field color sequential method to display two sub-pictures in a time sequence, so that the requirement on the response speed of the display device is reduced, and the color separation phenomenon of the pictures is reduced; meanwhile, compared with the second embodiment in which three display sub-modules 100 are adopted, in the present embodiment, two display sub-modules 100 are adopted, so that the thickness of the display device is reduced, thereby reducing the color mixing phenomenon at a large viewing angle, facilitating the light and thin design of the display device, and improving the quality of the display image. Therefore, the arrangement of the third embodiment is more preferable than the first and second embodiments.

On the basis, although the second display sub-module 102 in the embodiment adopts the field color sequential method to display two sub-frames in time sequence, compared with the first embodiment which adopts the field color sequential method to display three sub-frames in time sequence, the color separation phenomenon of the display frame can be properly reduced; however, in order to further reduce or avoid the color separation phenomenon in the present invention, it is preferable that, as shown in fig. 4a and fig. 4b, wherein fig. 4b is a schematic cross-sectional structure of fig. 4a at a position C-C', a projection of the first sub-pixel 301 in the pixel unit 300 on the substrate 200 has a hollow area D, and a projection of the second sub-pixel 302 on the substrate 200 is located in the hollow area D. In fig. 4a and 4b, the external light transmission region a is not disposed between the adjacent pixel units 300, but it is needless to say that the external light transmission region a may be disposed between the adjacent pixel units 300 as shown in fig. 5a, which is not limited in this embodiment.

Since the projection of the second sub-pixel 302 on the substrate 200 is located in the hollow area D, that is, as shown in fig. 4a and fig. 5a, the first sub-pixel 301 surrounds the second sub-pixel 302, so that even if the color separation phenomenon occurs when the second sub-pixel 302 displays two sub-pictures by using the field color sequential method, the entire pixel unit 300 formed by the first sub-pixel 301 and the second sub-pixel 302 performs color display because the second sub-pixel 302 is located in the hollow area D of the first sub-pixel 301, and thus the color separation phenomenon does not occur at the edge position.

It should be noted that, on the basis of the above-mentioned design structure that the projection of the second sub-pixel 302 on the substrate 200 is located in the hollow area D, an arrangement mode that the light source 20 located on the side of the first display sub-module 101 periodically emits the first primary color light and the second primary color light in turn, the light source 20 located on the side of the second display sub-module 102 periodically emits the third primary color light and the fourth primary color light in turn can be adopted, that is, when the first subpixel 301 and the second subpixel 302 both display two sub-pictures by using the field color sequential method, the first subpixel 301 surrounds the second subpixel 302, a color separation phenomenon with two sub-frames occurs at the edge of the first sub-pixel 301, however, compared to the first embodiment in which three sub-frames are displayed in time sequence by using the field color sequential method, in the case where the color separation phenomenon of three sub-pictures occurs at the edge of a sub-pixel, the color separation phenomenon of the display picture can be reduced as well.

On this basis, if the area of the second sub-pixel 302 relative to the hollow area D is too small, the aperture ratio of the whole display panel is reduced, which is not favorable for the display quality of the picture; if the area of the second sub-pixel 302 relative to the hollow area D is too large, that is, the second sub-pixel 302 and the first sub-pixel 301 have an overlapping area, light emitted by the second sub-pixel 302 in the overlapping area cannot effectively penetrate through the display panel, so that the light utilization rate is reduced, and the energy consumption of the display device is increased.

Furthermore, for convenience of manufacturing and processing, and according to the design of the pixel electrode in practice, the present invention may preferably provide that, as shown in fig. 4a and 5a, the projection of the first sub-pixel 301 on the substrate 200 is a rectangular ring; alternatively, as shown in fig. 5b, the projection of the first subpixel 301 on the base substrate 200 is in the shape of a regular hexagon.

In the first, second, and third embodiments, the TN type panel is taken as an example for explanation, but the present invention is not limited thereto, and the substrate In the present invention may be an ADS (Advanced-Super dimensional switching) type or an IPS (In Plane Switch) type panel. Of course, the effect of disordered alignment of the liquid crystal is more obvious for the polymer stabilized liquid crystal used in the present invention under the action of the vertical electric field, so the TN type display panel is preferably used in the present invention, that is, the pixel electrode 202 and the common electrode 203 in the display sub-module 100 are located at two sides of the liquid crystal layer 201.

In addition, the drawings in the present invention are only schematic structural diagrams, and those skilled in the art should understand that: in order to provide the polymer stabilized liquid crystal with an initial alignment, alignment layers (both shown) are further disposed on both sides of the liquid crystal layer 201. Preferably, the refractive index of the liquid crystal layer 201 is greater than that of the alignment layer so that side-in light can propagate in the liquid crystal layer. Of course, in general, a sealing structure of a sealant is provided around a display region where the pixel unit 300 is provided, and a Bonding Area (Bonding Area) or the like is provided in a region other than the sealing structure, which is shown in the drawings.

Further, in the case that the display module 10 includes two display sub-modules 100 stacked one on another, the adjacent display sub-modules 100 are generally bonded and assembled by using an optical adhesive, in this case, since the main alignment mark is generally disposed on the side having the pixel electrode 202, in order to precisely align and install the two display sub-modules 100, it is preferable in the present invention that, as shown in fig. 6, the pixel electrode 202 of the two display sub-modules 100 is located between the two liquid crystal layers 201 of the two display sub-modules 100, so as to achieve precise alignment and assembly.

In addition, in order to reduce the thickness of the display device, when the display module 10 includes at least two display sub-modules 100 stacked, a layer of the substrate 200 may be shared between adjacent display sub-modules 100, and the manufacturing process is relatively complicated by using this method.

In an embodiment of the present invention, in view of the transparent display device in which the display module 10 includes the first display sub-module 101 and the second display sub-module 102 that are stacked, a display method of the display device is also provided, as shown in fig. 7, the display method includes:

step S101, synchronously scanning the first sub-pixel 301 of the first display sub-module 101 and the second sub-pixel 302 of the second display sub-module 102 line by line.

The first subpixel 301 and the second subpixel 302 form a pixel unit 300, and preferably, the first subpixel 301 surrounds the second subpixel 302.

Step S102, controlling the light source 20 at the side of the first display sub-module 101 to emit the first primary color light, and controlling the light source 20 at the side of the second display sub-module 102 to periodically emit at least the second primary color light and the third primary color light in sequence.

Specifically, the light of the first primary color may be red light, the light of the second primary color may be green light, and the light of the third primary color may be blue light, although other light of primary colors may also be included, which is not limited in the present invention.

Step S103, when a row of pixel units 300 formed by the first sub-pixel 301 and the second sub-pixel 302 is scanned, applying an electrical signal to the pixel electrode of the first sub-pixel 301 according to the first primary color gray scale value of each pixel in the row, applying an electrical signal to the pixel electrode of the second sub-pixel 302 according to the second primary color gray scale value of each pixel in the row when the light source on the side of the second display sub-module 102 emits the second primary color light, and applying an electrical signal to the pixel electrode of the second sub-pixel 302 according to the third primary color gray scale value of each pixel in the row when the light source on the side of the second display sub-module 102 emits the third primary color light, so that the pixel electrode 202 and the common electrode 203 in each pixel in the row form an electric field for driving the liquid crystal layer.

It should be noted that, the above steps S101, S102, and S103 mean the sequence of different steps, and the above steps are performed synchronously in the actual display process.

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

1. A transparent display device, comprising:

the display module assembly, the display module assembly includes at least one display sub-module assembly, the display sub-module assembly includes: the liquid crystal display panel comprises a liquid crystal layer, a pixel electrode and a common electrode, wherein the liquid crystal layer is positioned between two substrate substrates, and the pixel electrode and the common electrode are used for driving the liquid crystal layer; the display module is divided into a plurality of pixel units; the pixel units are transparent, and an external light transmission area is arranged between every two adjacent pixel units;

the light sources are positioned on the side surfaces of the display sub-modules and used for emitting light rays to the liquid crystal layer;

the display module comprises a first display sub-module and a second display sub-module which are arranged in a stacked mode, the first display sub-module is divided into first sub-pixels, the second display sub-module is divided into second sub-pixels, the first sub-pixels and the second sub-pixels form the pixel unit, the light source located on the side face of the first display sub-module emits first primary color light, and the light source located on the side face of the second display sub-module periodically and sequentially emits at least second primary color light and third primary color light;

the projection of the first sub-pixel in the pixel unit on the substrate base plate is provided with a hollow-out area, and the projection of the second sub-pixel on the substrate base plate is positioned in the hollow-out area.

2. The transparent display device according to claim 1, wherein the projection of the second sub-pixel on the substrate base plate is the same or approximately the same as the shape and size of the hollow area.

3. The transparent display device according to claim 2, wherein the projection of the first sub-pixel on the substrate base plate is in a rectangular ring shape or a regular hexagonal ring shape.

4. The transparent display device according to any one of claims 1-3, wherein the pixel electrodes and the common electrode in the display sub-module are located on both sides of the liquid crystal layer.

5. The transparent display device according to claim 4, wherein in a case where the display module comprises two display sub-modules arranged in a stacked manner, the pixel electrodes of the two display sub-modules are located between the two liquid crystal layers of the two display sub-modules.

6. A display method of the transparent display apparatus according to claim 1, wherein the method comprises:

synchronously scanning a first sub-pixel of the first display sub-module and a second sub-pixel in the second display sub-module line by line;

controlling a light source on the side surface of the first display sub-module to emit first primary color light, and controlling a light source on the side surface of the second display sub-module to periodically and sequentially emit at least second primary color light and third primary color light;

when a row of pixel units formed by the first sub-pixel and the second sub-pixel is scanned, an electric signal is applied to the pixel electrode of the first sub-pixel according to the first primary color gray value of each pixel in the row, when the light source on the side of the second display sub-module emits second primary color light, an electric signal is applied to the pixel electrode of the second sub-pixel according to the second primary color gray value of each pixel in the row, when the light source on the side of the second display sub-module emits third primary color light, an electric signal is applied to the pixel electrode of the second sub-pixel according to the third primary color gray value of each pixel in the row, and therefore the pixel electrode and the common electrode in each pixel in the row form an electric field for driving the liquid crystal layer.