CN112017549A - Display device and control method thereof - Google Patents
Display device and control method thereof Download PDFInfo
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- CN112017549A CN112017549A CN202010873328.XA CN202010873328A CN112017549A CN 112017549 A CN112017549 A CN 112017549A CN 202010873328 A CN202010873328 A CN 202010873328A CN 112017549 A CN112017549 A CN 112017549A
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09F—DISPLAYING; ADVERTISING; SIGNS; LABELS OR NAME-PLATES; SEALS
- G09F9/00—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements
- G09F9/30—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements in which the desired character or characters are formed by combining individual elements
- G09F9/302—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements in which the desired character or characters are formed by combining individual elements characterised by the form or geometrical disposition of the individual elements
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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
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N23/00—Cameras or camera modules comprising electronic image sensors; Control thereof
- H04N23/56—Cameras or camera modules comprising electronic image sensors; Control thereof provided with illuminating means
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N23/00—Cameras or camera modules comprising electronic image sensors; Control thereof
- H04N23/57—Mechanical or electrical details of cameras or camera modules specially adapted for being embedded in other devices
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N23/00—Cameras or camera modules comprising electronic image sensors; Control thereof
- H04N23/70—Circuitry for compensating brightness variation in the scene
- H04N23/71—Circuitry for evaluating the brightness variation
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N23/00—Cameras or camera modules comprising electronic image sensors; Control thereof
- H04N23/70—Circuitry for compensating brightness variation in the scene
- H04N23/74—Circuitry for compensating brightness variation in the scene by influencing the scene brightness using illuminating means
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- Physics & Mathematics (AREA)
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- Computer Hardware Design (AREA)
- Electroluminescent Light Sources (AREA)
- Control Of Indicators Other Than Cathode Ray Tubes (AREA)
Abstract
The embodiment of the invention discloses a display device and a control method thereof. The display device comprises a display panel, a photosensitive device and an illumination unit; the display panel comprises a display area; the display area comprises a first display area, a second display area and a third display area, and the first display area and the second display area are positioned at the edge of one side of the third display area; the transparency of the first display area and the second display area is greater than that of the third display area, and the sub-pixel density of the first display area and the second display area is less than that of the third display area; the photosensitive device and the lighting unit are arranged on the non-display side of the display panel, the photosensitive device is located in the first display area, and the lighting unit is located in the second display area. According to the technical scheme of the embodiment of the invention, the problem of poor photographing effect of the camera caused by low transparency of the transparent display area of the conventional display device is solved, and the photographing effect of the display device is improved.
Description
Technical Field
The embodiment of the invention relates to the technical field of display, in particular to a display device and a control method thereof.
Background
With the development of display technology, the design requirements of display screens are higher and higher. In order to increase the screen ratio and achieve a real full screen, a camera in the display device is usually disposed under the transparent display area, which is called an under-screen camera technology. However, in the conventional display device, the transparency of the transparent display area is not high, so that the light requirement during shooting cannot be met, and especially, the shooting effect of the camera is seriously affected under the conditions of dark environment and insufficient external light.
Disclosure of Invention
The embodiment of the invention provides a display device and a control method thereof, which are used for improving the photographing effect of the display device.
In a first aspect, embodiments of the present invention provide a display apparatus, which includes a display panel, a light sensing device, and an illumination unit;
the display panel comprises a display area; the display area comprises a first display area, a second display area and a third display area, and the first display area and the second display area are positioned at one side edge of the third display area; the transparency of the first display area and the second display area is greater than that of the third display area, and the sub-pixel density of the first display area and the second display area is less than that of the third display area;
the photosensitive device and the lighting unit are arranged on the non-display side of the display panel, the photosensitive device is located in the first display area, and the lighting unit is located in the second display area.
Optionally, the sub-pixel density of the first display area is equal to the sub-pixel density of the second display area.
Optionally, the display panel further includes a first pixel circuit and a second pixel circuit, the first pixel circuit is configured to drive the sub-pixels of the first display area to emit light, the second pixel circuit is configured to drive the sub-pixels of the second display area to emit light, and the first pixel circuit and the second pixel circuit have the same structure.
Optionally, the display region further includes a fourth display region surrounding the first display region and the second display region, and the first pixel circuit and the second pixel circuit are disposed in the fourth display region.
Optionally, the display area further includes a fourth display area located between the first display area and the second display area, and the first pixel circuit and the second pixel circuit are disposed in the fourth display area.
Optionally, the sub-pixel density of the fourth display area is less than the sub-pixel density of the third display area.
Optionally, the display panel further includes a light shielding structure disposed on a non-display side of the display panel and between the first display area and the second display area;
preferably, the light shielding structure is disposed adjacent to the second display region.
In a second aspect, embodiments of the present invention further provide a control method for a display apparatus, where the display apparatus includes a display panel, a light sensing device, and an illumination unit; the display panel comprises a display area; the display area comprises a first display area, a second display area and a third display area, and the first display area and the second display area are positioned at one side edge of the third display area; the transparency of the first display area and the second display area is greater than that of the third display area, and the sub-pixel density of the first display area and the second display area is less than that of the third display area; the photosensitive device and the lighting unit are arranged on the non-display side of the display panel, the photosensitive device is located in the first display area, and the lighting unit is located in the second display area; the control method of the display device comprises the following steps:
in a display mode, controlling the first display area, the second display area and the third display area to perform light-emitting display;
and in the shooting mode, the first display area and the second display area are controlled to stop luminous display, and the photosensitive device and the lighting unit are controlled to work.
Optionally, in the image capturing mode, when the ambient light intensity is lower than the preset intensity, the illumination unit is controlled to operate.
Optionally, the display panel further includes a first pixel circuit and a second pixel circuit, the first pixel circuit is configured to drive the sub-pixels of the first display area to emit light, the second pixel circuit is configured to drive the sub-pixels of the second display area to emit light, and the first pixel circuit and the second pixel circuit have the same structure;
the first display area and the second display area have the same display brightness and gamma voltage corresponding relation.
According to the technical scheme of the embodiment of the invention, in a shooting mode, a front-mounted camera in the photosensitive device carries out image acquisition, for example, when a human face is shot, if the surrounding environment is dark or the external light is insufficient, the lighting unit is controlled to emit light, and the light emitting devices of the first display area and the second display area are controlled to stop emitting light for display, so that the light emitted by the lighting unit can illuminate the human face through the second display area to supplement the ambient light, so that the human face reflects sufficient light to the photosensitive device, the human face image shot by the photosensitive device is clearer, the problem of poor shooting effect of the camera caused by low transparency of the transparent display area of the conventional display device is solved, and the shooting effect of the photosensitive device is improved. Under the display mode, control first display area, second display area and third display area and carry out normal luminous demonstration, need not to set up an area alone in display panel and make a video recording, when having promoted display device's the effect of shooing, promoted the screen again and accounted for than, be favorable to the realization of full face screen. In addition, the sub-pixel density of the first display area and the second display area is smaller than that of the third display area, so that the areas, which can be penetrated by light rays, of the display panels of the first display area and the second display area are larger, the effect of supplementing ambient light rays by the lighting unit is better, and the photographing effect of the photosensitive device is better.
Drawings
Fig. 1 is a schematic structural diagram of a display panel according to an embodiment of the present invention;
fig. 2 is a schematic cross-sectional view of a display device according to an embodiment of the invention;
fig. 3 is a schematic diagram of a display device according to an embodiment of the present invention;
fig. 4 is a schematic structural diagram of a pixel circuit according to an embodiment of the present invention;
fig. 5 is a schematic structural diagram of another pixel circuit according to an embodiment of the present invention;
FIG. 6 is a schematic structural diagram of another display panel according to an embodiment of the present invention;
FIG. 7 is a schematic structural diagram of another display panel according to an embodiment of the present invention;
fig. 8 is a schematic cross-sectional view of another display device according to an embodiment of the invention;
fig. 9 is a flowchart illustrating a control method of a display device according to an embodiment of the present invention.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the invention and are not limiting of the invention. It should be further noted that, for the convenience of description, only some of the structures related to the present invention are shown in the drawings, not all of the structures.
As described in the background art, in the conventional display device, the photographing effect of the camera is poor. The inventors found that the above problems occur due to the following reasons: in order to increase the screen ratio and achieve a real full-screen display, a transparent display area is usually designed in a display panel, and a camera is disposed below the transparent display area, which is called an under-screen camera technology. In order to achieve the display performance, the transparent display area is provided with a plurality of display function layers, and the transparency of the transparent display area is still not high because each display function layer affects the transparency of the transparent display area. The transparency of the transparent display area directly affects the photographing effect of the camera, the lower the transparency is, the weaker the light received by the camera when photographing is performed, the poorer the photographing effect is, and particularly, the photographing effect of the camera is further affected under the conditions that the surrounding environment is dark and the external light is insufficient.
In view of the above problems, embodiments of the present invention provide a display device, which may be a device with a display function, such as a mobile phone, a computer, and a tablet computer. Fig. 1 is a schematic structural diagram of a display panel according to an embodiment of the present invention, fig. 2 is a schematic structural cross-sectional diagram of a display device according to an embodiment of the present invention, the display device shown in fig. 2 may include the display panel shown in fig. 1, and in conjunction with fig. 1 and fig. 2, the display device 1 includes a display panel 100, a light sensing device 200, and an illumination unit 300; the display panel 100 includes a display area; the display area comprises a first display area D1, a second display area D2 and a third display area D3, and the first display area D1 and the second display area D2 are positioned at one side edge of the third display area D3; the transparency of the first display region D1 and the second display region D2 is greater than that of the third display region D3, and the sub-pixel density of the first display region D1 and the second display region D2 is less than that of the third display region D3; the light sensing device 200 and the illumination unit 300 are disposed on the non-display side of the display panel 100, the light sensing device 200 is located in the first display region D1, and the illumination unit 300 is located in the second display region D2.
Specifically, the display panel 100 may be an Organic Light-Emitting Diode (OLED) display panel, the display panel 100 includes a display area for performing Light-Emitting display, fig. 1 shows that the display panel 100 is a display panel that adopts an off-screen camera technology to realize overall display, and fig. 2 shows a cross-sectional structure of the display panel 100 in the display device 1. Referring to fig. 1 and 2, the display region of the display panel 100 includes a first display region D1, a second display region D2, and a third display region D3, wherein the first display region D1 and the second display region D2 are located at the same side edge of the third display region D3, and the third display region D3 surrounds at least a portion of the first display region D1 and at least a portion of the second display region D2. The first display area D1 and the second display area D2 may be disposed adjacent to each other on one side of the third display area D3, or may be disposed at a set distance, fig. 1 shows that the second display area D2 is located on the right side of the first display area D1, and in practical applications, the second display area D2 may also be located on the left side of the first display area D1.
Illustratively, the first display region D1 and the second display region D2 are transparent display regions, and the third display region D3 is a normal display region. The light sensing device 200 and the illumination unit 300 are disposed on the non-display side of the display panel 100, i.e., the back side of the light emitting side of the display panel 100. The light sensing device 200 may be an off-screen front camera in the display apparatus 1, and accordingly, the first display region D1 is a transparent display region in the display apparatus where the off-screen camera is disposed, so that the light sensing device 200 can sense light through the first display region D1. The lighting unit 300 may be a lighting device such as an LED lamp, and light emitted from the lighting unit 300 can be externally irradiated through the second display region D2.
Exemplarily, referring to fig. 2, the display panel 100 includes at least a substrate 10, a light emitting function layer 20, and a pixel defining layer 30, as well as an insulating layer and an optical function layer such as a polarizer (the insulating layer and the optical function layer are not shown in fig. 2). The substrate 10 may be an array substrate, the substrate 10 may provide buffering, protection, or support functions for the display panel, and the substrate 10 includes a plurality of pixel circuits, and the pixel circuits may provide driving signals for the light emitting devices in the display panel 100 to drive the light emitting devices in the display panel to emit light. The light emitting function layer 20 forms a plurality of light emitting devices, which may be OLED devices, each of the light emitting devices includes an anode, a light emitting layer and a cathode, the light emitting layer at least includes a red light emitting layer, a green light emitting layer and a blue light emitting layer, and each of the light emitting devices is electrically connected to the pixel circuit through the anode, so that the pixel circuit provides a driving voltage for the light emitting device to drive the light emitting device to emit light, thereby enabling the display panel 100 to realize multi-color display. The pixel defining layer 30 serves to define a plurality of light emitting devices in the display surface.
The light emitting device exemplarily provided in fig. 2 in the first and second display regions D1 and D2 includes a first electrode 21a, a light emitting layer 22, and a second electrode 23, and the light emitting device in the third display region D3 includes a third electrode 21b, a light emitting layer 22, and a second electrode 23, the first and third electrodes 21a and 21b being anodes, and the second electrode 23 being a cathode. To ensure that the transparency of the first and second display regions D1 and D2 is greater than that of the third display region D3, the substrate 10, the first electrode 21a, the light emitting layer 22a and the second electrode 23 may be provided with a transparent material, the transparency of the first electrode 21a is greater than that of the third electrode 21b, for example, the first electrode 21a is made of Indium Tin Oxide (ITO) or Indium Zinc Oxide (IZO), the ITO and IZO are both transparent semiconductor conductive materials, and have good conductivity and transparency, the light transmittance of the ITO can reach over 90%, the light transmittance of the IZO is also high, the third electrode 21b can be made of stacked Indium Tin Oxide (ITO), silver (Ag) and Indium Tin Oxide (ITO), or Indium Zinc Oxide (IZO), silver (Ag) and Indium Zinc Oxide (IZO) which are stacked.
Among the prior art, leading camera carries out image acquisition under the screen, for example when shooing the people's face, the environment light that the people's face reflected can be gathered by leading camera through display panel's transparent display area, and under the darker condition of ambient light, the environment light of people's face reflection is not enough, and the people's face image that leads to leading camera to shoot is also darker, has influenced display device's the effect of shooing. Fig. 3 is a schematic diagram of the display device according to the embodiment of the present invention when taking a picture, and with reference to fig. 1 to 3, in this embodiment, the advantage of setting the transparency of the first display area D1 and the second display area D2 to be greater than the transparency of the third display area D3 is that, in the image capturing mode, the front camera in the photosensitive device 200 performs image capturing, for example, when taking a human face, if the surrounding environment is dark or the external light is insufficient, the illumination unit 300 may be controlled to emit light, and the light emitting devices in the first display area D1 and the second display area D2 are controlled to stop emitting light for displaying, so that the light emitted by the illumination unit 300 may illuminate the human face through the second display area D2, and supplement the ambient light, so that the human face reflects sufficient light to the photosensitive device 200, so that the human face image taken by the photosensitive device 200 is clearer, and the picture taking effect of the photosensitive device 200 is improved. Under the display mode, control first display area D1, second display area D2 and third display area D3 and carry out normal luminous demonstration, need not to set up an area alone in display panel and make a video recording, when having promoted display device's the effect of shooing, promoted the screen again and accounted for the ratio, be favorable to the realization of full face screen.
In addition, the sub-pixel density of the first display region D1 and the second display region D2 is set to be smaller than that of the third display region D3 in the present embodiment. Where pixel density (PPI) refers to the number of Pixels Per unit area of a display area (e.g., Per Inch of the display area), a sub-pixel corresponds to one light emitting device in the display area, and sub-pixel density is understood to be the number of light emitting devices Per unit area of the display area. Compared with the third display area D3, in the first display area D1 and the second display area D2, the number of light emitting devices in the display area per unit area is smaller, and accordingly, the number of pixel circuits corresponding to the light emitting devices is smaller, and the area through which light can penetrate in the display panels of the first display area D1 and the second display area D2 is larger, so that the more light which is irradiated to the human face through the second display area D2 in the light emitted by the lighting unit 300, the more reflected light of the human face can be collected by the photosensitive device 200 through the first display area D1, so that the lighting unit 300 has a better effect of supplementing ambient light, and the better photographing effect of the photosensitive device 200 is achieved. Meanwhile, since the sub-pixel density of the first display area D1 and the second display area D2 is less than that of the normal display area, compared with the normal display area, in the first display area D1 and the second display area D2, the number of slits formed by the gaps between the adjacent light emitting devices in the display area per unit area is less, and the width of the slits is wider, so that the phenomenon that light passes through the slits in the first display area D1 and the second display area D2 and is diffracted is not obvious, and the influence of the diffraction of the light on the light filling effect of the lighting unit 300 and the photographing effect of the photosensitive device 200 is reduced.
It should be noted that fig. 2 only schematically illustrates a portion of the first display region D1, the second display region D2, and the third display region D3 in the display panel, and a portion of the light emitting devices in the first display region D1, the second display region D2, and the third display region D3. In practical applications, the first display region D1, the second display region D2, and the third display region D3 may each include a plurality of light emitting devices, which is not limited in the embodiments of the present invention.
With reference to fig. 1 and fig. 2, on the basis of the above embodiment, the sub-pixel density of the first display area D1 may be set to be equal to the sub-pixel density of the second display area D2. In this way, the sub-pixel density of the first display area D1 and the sub-pixel density of the second display area D2 are equal, and the sub-pixel density of the first display area D1 and the sub-pixel density of the second display area D2 are less than the sub-pixel density of the third display area D3, the first display area D1 and the second display area D2 can adopt the same pixel arrangement mode, and the light emitting devices in the first display area D1 and the second display area D2 can be manufactured in one set of processing technology, so that the manufacturing technology of the display panel is simplified, and the phenomenon that the driving mode of the display panel is too complicated due to the three or more sub-pixel densities in one display panel is avoided.
Referring to fig. 2, the display panel 100 further includes a first pixel circuit (not shown in fig. 2) for driving the sub-pixels of the first display region D1 to emit light and a second pixel circuit (not shown in fig. 2) for driving the sub-pixels of the second display region D2 to emit light, and the first pixel circuit and the second pixel circuit have the same structure. Specifically, the first pixel circuit and the second pixel circuit are disposed in the substrate 10, and both the first pixel circuit and the second pixel circuit may include a plurality of thin film transistors, a plurality of signal traces and a capacitor, wherein the thin film transistors include a driving transistor and a switching transistor, the driving transistor may generate a driving current and output the driving current to the first electrode 21a and the third electrode 21b, so as to drive the light emitting device to emit light, and the switching transistor mainly plays a role of switching. The signal traces can include traces for transmitting data signals, traces for transmitting scan signals, power lines, and the like for the pixel circuits, and different signal traces can transmit different signals for the pixel circuits. The capacitor may be used to maintain the potential of the gate of the driving transistor after the driving transistor is written with the data voltage, so that the driving transistor can provide a stable driving current for the light emitting device, and the brightness of the light emitted by the light emitting device is kept stable.
Fig. 4 is a schematic structural diagram of a pixel circuit, specifically a pixel circuit with a 2T1C structure according to an embodiment of the present invention, and illustratively, the first pixel circuit and the second pixel circuit may adopt the pixel circuit structure shown in fig. 4, and the pixel circuit drives the pixels (light emitting devices) in the first display region D1 and the second display region D2 to emit light by using two transistors and one storage capacitor. The pixel circuit includes a switching transistor T0, a driving transistor T1, a storage capacitor Cs0, and a light emitting device 11. The pixel circuit is driven in such a manner that the brightness (gray scale) of a pixel is controlled by two transistors and a storage capacitor Cs 0. When the Scan signal Scan1 is applied through the Scan line to turn on the switch transistor T0, the data voltage signal Vdata fed by the data line charges the storage capacitor Cs0 through the switch transistor T0, so that the data voltage signal Vdata is stored in the storage capacitor Cs0, and the stored data signal Vdata can control the conduction degree of the driving transistor T1, so as to control the current magnitude of the driving transistor T1 for driving the light emitting device 11 to emit light, i.e. the current determines the gray scale of the pixel to emit light.
Fig. 5 is a schematic structural diagram of another pixel circuit provided in the embodiment of the present invention, specifically a pixel circuit with a 7T1C structure, and exemplarily, the first pixel circuit and the second pixel circuit may also adopt the pixel circuit structure shown in fig. 5, where the pixel circuit drives the pixels (light emitting devices) in the first display region D1 and the second display region D2 to emit light by using seven transistors and one storage capacitor. In the initialization stage, the first scan signal S1 input by the first scan signal line may be at a low level, the initialization transistors M5 and M6 are controlled to be turned on, the reference voltage Vref supplied by the reference voltage line is written to the gate of the driving transistor N0 and the anode of the light emitting device 11 through the initialization transistors M5 and M6, respectively, and the gate of the driving transistor N0 and the anode of the light emitting device 11 are initialized. In the data writing phase, the second scan signal S2 input by the second scan signal line may be at a low level, the data writing transistor M1 and the compensation transistor M2 are turned on, the data voltage signal Vdata provided by the data signal line is written to the gate of the driving transistor N0 through the data writing transistor M1, the driving transistor N0 and the compensation transistor M2, and the storage capacitor Cs1 maintains the written voltage, thereby implementing the writing of the data voltage signal Vdata. In the light emitting phase, the light emitting control signal EM provided by the light emitting control signal line may be at a low level, the light emitting control transistors M3 and M4 are turned on, and the driving transistor N0 generates a driving current according to the driving power provided by the first power voltage signal Vdd on the first power line and the second power voltage signal Vss on the second power line to drive the light emitting device 11 to emit light.
In this embodiment, the first pixel circuit and the second pixel circuit are configured to have the same structure, and two circuit structures of the first pixel circuit and the second pixel circuit are exemplarily provided. The pixel circuit structures of the first display region D1 and the second display region D2 are the same.
In addition, the same driving method can be adopted to control the operation of the first pixel circuit and the second pixel circuit, so as to avoid the driving method of the display panel from being too complicated. Exemplarily, the display brightness and the gamma voltage of the first display region D1 and the second display region D2 have the same correspondence relationship. In order to improve the display effect of the display panel, gamma debugging needs to be performed on the display panel, the display panel has a plurality of display brightness levels, each display brightness level has gray scales of 0-255, and accordingly, the first pixel circuit and the second pixel circuit are configured to have the same structure corresponding to 256 brightness and gamma voltages (data voltages), so that the gamma voltages when the pixels of the first display area D1 and the second display area D2 perform light emitting display at the same display brightness level and at the same display brightness are the same, the pixels of the first display area D1 and the second display area D2 are prevented from being driven to perform light emitting display by adopting a plurality of corresponding relationships between the display brightness and the gamma voltage, and the driving modes of the pixels of the first display area D1 and the second display area D2 are simplified.
Fig. 6 is a schematic structural diagram of another display panel according to an embodiment of the present invention, and as shown in fig. 6, in this embodiment, the display region of the display panel 100 further includes a fourth display region D4 surrounding the first display region D1 and the second display region D2, and the first pixel circuit and the second pixel circuit are disposed in the fourth display region D4. Illustratively, the fourth display region D4 is disposed around the first display region D1 and the second display region D2, the first pixel circuit of the light emitting device driving the first display region D1, and the second pixel circuit of the light emitting device driving the second display region D2 may be disposed in the array substrate of the fourth display region D4, for example, the thin film transistor in the first pixel circuit and the second pixel circuit is disposed at the same layer as each electrode layer of the thin film transistor in the pixel circuit of the light emitting device driving the fourth display region D4, the plates of the capacitor in the first pixel circuit and the second pixel circuit are disposed at the same layer as each other as the plates of the capacitor in the pixel circuit of the light emitting device driving the fourth display region D4, the metal wirings in the first pixel circuit and the second pixel circuit are disposed at the same layer as the metal wirings in the pixel circuit of the light emitting device driving the fourth display region D4, and the anode 4 of the light emitting device in the first display region D1 and the second display region D2 are disposed at the same layer as the metal wirings in the same layer as the anode 4 of the display region D4 The corresponding pixel circuits are electrically connected. The first pixel circuit and the second pixel circuit are disposed in the fourth display area D4, and can improve the transparency of the array substrate of the first display area D1 and the second display area D2, so as to improve the transparency of the first display area D1 and the second display area D2, so that in the image capturing mode, the area through which light can penetrate in the display panels of the first display area D1 and the second display area D2 is larger, and the light supplementing effect of the illumination unit and the photographing effect of the photosensitive device can be improved.
Fig. 7 is a schematic structural diagram of another display panel provided in an embodiment of the invention, and as shown in fig. 7, in this embodiment, the display region of the display panel 100 further includes a fourth display region D4 disposed between the first display region D1 and the second display region D2, and the first pixel circuit and the second pixel circuit are disposed in the fourth display region D4. The first pixel circuit and the second pixel circuit are disposed in the fourth display area D4 between the first display area D1 and the second display area D2, which is also helpful for improving the transparency of the array substrate of the first display area D1 and the second display area D2, so as to improve the transparency of the first display area D1 and the second display area D2, so that in the image capturing mode, the areas of the display panels of the first display area D1 and the second display area D2 through which light can penetrate are larger, which is also helpful for improving the light supplement effect of the illumination unit and the photographing effect of the photosensitive device.
Referring to fig. 6 or 7, in the present embodiment, the sub-pixel density of the fourth display region D4 is set to be less than the sub-pixel density of the third display region D3. This arrangement is advantageous in that, in the fourth display region D4, the number of light emitting devices per unit area of the display region is smaller than that in the third display region D3, and accordingly, the number of pixel circuits corresponding to the light emitting devices is also smaller, so that the fourth display region D4 has more space in the substrate to accommodate the first pixel circuit corresponding to the first display region D1 and the second pixel circuit corresponding to the second display region D2, which contributes to achieving higher transparency of the first display region D1 and the second display region D2, thereby improving the photographing effect of the display device. Preferably, the sub-pixel densities of the first display region D1, the second display region D2 and the fourth display region D4 are equal and less than the sub-pixel density of the third display region D3. Therefore, the first display area D1, the second display area D2 and the fourth display area D4 can adopt the same pixel arrangement mode, and the light-emitting devices in the first display area D1, the second display area D2 and the fourth display area D4 can be manufactured in a set of processing technology, so that the manufacturing technology of the display panel is simplified, and the phenomenon that the driving mode of the display panel is too complicated due to the fact that three or more sub-pixel densities appear in one display panel is avoided.
Referring to fig. 2, in an embodiment of the present invention, the display panel 100 further includes a light shielding structure 40, and the light shielding structure 40 is disposed on the non-display side of the display panel 100 and located between the first display region D1 and the second display region D2. For example, the light shielding structure 40 is disposed on a side surface of the substrate 10 of the display panel 100 away from the pixel defining layer 30, and the light shielding structure 40 may be made of an opaque material, for example, the light shielding structure 40 is a black film layer, so as to prevent light from being reflected on the surface thereof. When the light shielding structure 40 is not provided, in the image capturing mode, if the ambient light is insufficient, and the illumination unit 300 performs light compensation, part of the light emitted by the illumination unit 300 is irradiated to the surface of the substrate 10 away from the pixel defining layer 30, and then is directly reflected to the light sensing device 200, so that a "white point" is present in an image collected by the light sensing device 200, and the photographing effect of the light sensing device 200 is affected. After the light shielding structure 40 is arranged, in a shooting mode, if ambient light is insufficient, the lighting unit 300 performs light supplement, partial light emitted by the lighting unit 300 irradiates the light shielding structure 40, and cannot be reflected to the photosensitive device 200 continuously, so that light emitting crosstalk of the lighting unit 300 to the photosensitive device 200 is avoided, and the shooting effect of the display device is further improved.
Referring to fig. 2, for example, when the first display area D1 and the second display area D2 are spaced apart by a set distance, the entire surface of the light shielding structure 40 may be disposed on the non-display side of the display panel 100 to cover the position between the first display area D1 and the second display area D2, so as to ensure the light shielding effect of the light shielding structure 40, and avoid the influence of the light crosstalk of the lighting unit 300 on the light sensing device 200 when the lighting unit 300 is used for light compensation. Fig. 8 is a schematic cross-sectional structure view of another display device according to an embodiment of the present invention, and as shown in fig. 8, the light shielding structure 40 may also be disposed only near the second display area D2, so that the light shielding structure 40 is close to the lighting unit 300, thereby better ensuring the light shielding effect of the light shielding structure 40 and avoiding affecting the lighting of the photosensitive device 200 when the lighting unit 300 is used for light compensation.
Note that fig. 8 schematically shows only a part of the first display region D1, the second display region D2, and the third display region D3 in the display panel, and a part of the light emitting devices in the first display region D1, the second display region D2, and the third display region D3. In practical applications, the first display region D1, the second display region D2, and the third display region D3 may each include a plurality of light emitting devices, which is not limited in the embodiments of the present invention.
The embodiment of the invention also provides a control method of a display device, and fig. 9 is a flow diagram of the control method of the display device provided by the embodiment of the invention. The control method of the display device provided by the embodiment of the invention is used for controlling the display device provided by the above embodiment of the invention, and with reference to fig. 1 and fig. 2, the display device 1 includes a display panel 100, a photosensitive device 200, and an illumination unit 300; the display panel 100 includes a display area; the display area comprises a first display area D1, a second display area D2 and a third display area D3, and the first display area D1 and the second display area D2 are positioned at one side edge of the third display area D3; the transparency of the first display region D1 and the second display region D2 is greater than that of the third display region D3, and the sub-pixel density of the first display region D1 and the second display region D2 is less than that of the third display region D3; the light sensing device 200 and the illumination unit 300 are disposed on the non-display side of the display panel 100, the light sensing device 200 is located in the first display region D1, and the illumination unit 300 is located in the second display region D2. Accordingly, the control method of the display device includes:
and S110, controlling the first display area, the second display area and the third display area to perform light-emitting display in the display mode.
Specifically, in the display mode, the light emitting devices in the first, second, and third display regions D1, D2, and D3 are driven by the pixel circuits in the substrate 10 to perform normal light emitting display.
And S120, in the shooting mode, controlling the first display area and the second display area to stop luminous display, and controlling the photosensitive device and the lighting unit to work.
For example, with reference to fig. 1 to fig. 3, in the image capturing mode, the third display area D3 may be kept to continue to perform light emitting display, the first display area D1 and the second display area D2 are controlled to stop light emitting display, and the light sensing device 200 and the illumination unit 300 are controlled to operate, for example, a human face is captured through the light sensing device 200, so that light emitted by the illumination unit 300 may illuminate the human face through the second display area D2, and ambient light is supplemented, so that the human face reflects sufficient light to the light sensing device 200, that an image of the human face captured by the light sensing device 200 is clearer, and the image capturing effect of the light sensing device 200 is improved. Under the display mode, control first display area D1, second display area D2 and third display area D3 and carry out normal luminous demonstration, need not to set up an area alone in display panel and make a video recording, when having promoted display device's the effect of shooing, promoted the screen again and accounted for the ratio, be favorable to the realization of full face screen.
For example, referring to fig. 1 to 3, in the image capturing mode, when the ambient light intensity is lower than the preset intensity, the illumination unit 300 is controlled to operate. Wherein, predetermine intensity for judging whether the surrounding environment is darker or whether sufficient intensity threshold value of light between the outer, under the mode of making a video recording, when ambient light intensity is less than predetermineeing intensity, then it is darker or external light is not enough to show the surrounding environment, can control lighting unit 300 work this moment, the light that lighting unit 300 sent can see through second display area D2 and supply ambient light like this, so that can reflect sufficient light to sensitization device 200 by the object of shooing, make the image that sensitization device 200 was shot more clear, the photographic effect of sensitization device 200 has been promoted.
Referring to fig. 2, the display panel 100 further includes a first pixel circuit and a second pixel circuit, the first pixel circuit drives the pixels of the first display region D1 to emit light, the second pixel circuit drives the pixels of the second display region D2 to emit light, the first pixel circuit and the second pixel circuit have the same structure, and accordingly, the corresponding relationship between the display luminance and the gamma voltage of the first display region and the second display region is the same. For example, to improve the display effect of the display panel, gamma debugging needs to be performed on the display panel, the display panel has a plurality of display brightness levels, each display brightness level has gray scales of 0 to 255, and accordingly, the first pixel circuit and the second pixel circuit are configured to have the same structure, so that the pixels of the first display area D1 and the second display area D2 have the same gamma voltage when performing light emitting display at the same display brightness level, and the pixels of the first display area D1 and the second display area D2 are prevented from being driven to perform light emitting display by adopting a plurality of corresponding relationships between the display brightness and the gamma voltage, thereby simplifying the driving manner of the pixels of the first display area D1 and the second display area D2.
It is to be noted that the foregoing is only illustrative of the preferred embodiments of the present invention and the technical principles employed. It will be understood by those skilled in the art that the present invention is not limited to the particular embodiments described herein, but is capable of various obvious changes, rearrangements and substitutions as will now become apparent to those skilled in the art without departing from the scope of the invention. Therefore, although the present invention has been described in greater detail by the above embodiments, the present invention is not limited to the above embodiments, and may include other equivalent embodiments without departing from the spirit of the present invention, and the scope of the present invention is determined by the scope of the appended claims.
Claims (10)
1. A display device is characterized by comprising a display panel, a photosensitive device and an illumination unit;
the display panel comprises a display area; the display area comprises a first display area, a second display area and a third display area, and the first display area and the second display area are positioned at one side edge of the third display area; the transparency of the first display area and the second display area is greater than that of the third display area, and the sub-pixel density of the first display area and the second display area is less than that of the third display area;
the photosensitive device and the lighting unit are arranged on the non-display side of the display panel, the photosensitive device is located in the first display area, and the lighting unit is located in the second display area.
2. The display device according to claim 1, wherein a sub-pixel density of the first display region is equal to a sub-pixel density of the second display region.
3. The display device according to claim 1, wherein the display panel further comprises a first pixel circuit and a second pixel circuit, the first pixel circuit is configured to drive the sub-pixels of the first display region to emit light, the second pixel circuit is configured to drive the sub-pixels of the second display region to emit light, and the first pixel circuit and the second pixel circuit have the same structure.
4. The display device according to claim 3, wherein the display region further comprises a fourth display region surrounding the first display region and the second display region, and wherein the first pixel circuit and the second pixel circuit are provided in the fourth display region.
5. The display device according to claim 3, wherein the display region further comprises a fourth display region between the first display region and the second display region, and wherein the first pixel circuit and the second pixel circuit are provided in the fourth display region.
6. The display device according to claim 4, wherein the sub-pixel density of the fourth display region is less than the sub-pixel density of the third display region.
7. The display device according to claim 1, wherein the display panel further comprises a light shielding structure disposed on a non-display side of the display panel and between the first display region and the second display region;
preferably, the light shielding structure is disposed adjacent to the second display region.
8. A control method of a display apparatus, characterized in that the display apparatus includes a display panel, a light sensing device, and an illumination unit; the display panel comprises a display area; the display area comprises a first display area, a second display area and a third display area, and the first display area and the second display area are positioned at one side edge of the third display area; the transparency of the first display area and the second display area is greater than that of the third display area, and the sub-pixel density of the first display area and the second display area is less than that of the third display area; the photosensitive device and the lighting unit are arranged on the non-display side of the display panel, the photosensitive device is located in the first display area, and the lighting unit is located in the second display area; the control method of the display device comprises the following steps:
in a display mode, controlling the first display area, the second display area and the third display area to perform light-emitting display;
and in the shooting mode, the first display area and the second display area are controlled to stop luminous display, and the photosensitive device and the lighting unit are controlled to work.
9. The method of claim 8, wherein the illumination unit is controlled to operate when the ambient light intensity is below a predetermined intensity in the camera mode.
10. The method of claim 9, wherein the display panel further comprises a first pixel circuit and a second pixel circuit, the first pixel circuit is used for driving the sub-pixels of the first display region to emit light, the second pixel circuit is used for driving the sub-pixels of the second display region to emit light, and the first pixel circuit and the second pixel circuit have the same structure;
the first display area and the second display area have the same display brightness and gamma voltage corresponding relation.
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| CN202010873328.XA CN112017549A (en) | 2020-08-26 | 2020-08-26 | Display device and control method thereof |
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