CN112002278B - Display panel and debugging method thereof - Google Patents
Display panel and debugging method thereof Download PDFInfo
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- CN112002278B CN112002278B CN202010888464.6A CN202010888464A CN112002278B CN 112002278 B CN112002278 B CN 112002278B CN 202010888464 A CN202010888464 A CN 202010888464A CN 112002278 B CN112002278 B CN 112002278B
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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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- 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
- G09G5/00—Control arrangements or circuits for visual indicators common to cathode-ray tube indicators and other visual indicators
- G09G5/10—Intensity circuits
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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
- G09G2320/00—Control of display operating conditions
- G09G2320/02—Improving the quality of display appearance
- G09G2320/0233—Improving the luminance or brightness uniformity across the screen
Abstract
The embodiment of the invention discloses a display panel and a debugging method thereof.A driving module adjusts corresponding data voltage of a preset sub-pixel under a preset gray scale according to the brightness difference of a first pixel group and a second pixel group sensed by a photosensitive module to determine target data voltage of the preset sub-pixel under the preset gray scale, so as to adjust the brightness of the preset sub-pixel in a first display area according to the target data voltage, and the difference between the brightness of the first pixel group and the brightness of the second pixel group under the preset gray scale is smaller than a preset brightness threshold value because the target data voltage meets the requirement that the difference between the brightness of the first pixel group and the brightness of the second pixel group is smaller than a preset brightness threshold value, thereby ensuring that the difference between the brightness of the preset sub-pixel in the first display area and the brightness of the second pixel group in the second display area is smaller. The uniformity of the display of the first display area preset sub-pixels and the second display area can be improved, and the uniformity of the display of the first display area and the second display area can be improved.
Description
Technical Field
The embodiment of the invention relates to the technical field of display, in particular to a display panel and a debugging method thereof.
Background
In display panel's structural design, because of need installation camera, fingerprint identification module etc. can set up the printing opacity display area in display panel usually to the display panel who leads to current including the printing opacity display area has the uneven problem of screen body demonstration.
Disclosure of Invention
The invention provides a display panel and a debugging method thereof, which are used for reducing the brightness difference between a first display area and a second display area under the same gray scale and improving the display uniformity.
In a first aspect, an embodiment of the present invention provides a display panel, where the display panel is divided into a first display area and a second display area, where the first display area is a light-transmitting display area; a plurality of sub-pixels are arranged in the first display area and the second display area;
the display panel comprises a photosensitive module and a driving module; the photosensitive modules are arranged on the light emergent side of the first pixel group and the light emergent side of the second pixel group; wherein the first pixel group comprises at least part of sub-pixels in the first display area, and the second pixel group comprises at least part of sub-pixels in the second display area; the photosensitive module is used for sensing the light-emitting brightness of the first pixel group and the light-emitting brightness of the second pixel group;
the driving module is electrically connected with the photosensitive module and used for adjusting the corresponding data voltage of the preset sub-pixel under the preset gray scale according to the difference between the brightness of the first pixel group and the brightness of the second pixel group sensed by the photosensitive module under the preset gray scale picture so as to determine the target data voltage of the preset sub-pixel under the preset gray scale; the preset sub-pixels comprise at least part of sub-pixels including a first pixel group in the first display area; and the target data voltage meets the condition that the difference between the luminous brightness of the first pixel group and the luminous brightness of the second pixel group under the preset gray scale is smaller than a preset brightness threshold value.
Optionally, the preset sub-pixels include all sub-pixels in the first display area.
Optionally, the first display area has a plurality of first pixel groups therein, the photosensitive module includes first photosensitive units corresponding to the first pixel groups one by one, and each of the first photosensitive units is disposed on a light emitting side of the corresponding first pixel group; the photosensitive module further comprises a second photosensitive unit, and the second photosensitive unit is arranged on the light emergent side of the second pixel group; the first photosensitive unit and the second photosensitive unit are respectively electrically connected with the driving module;
the driving module is used for adjusting the corresponding data voltage of the corresponding preset sub-pixel under the preset gray scale according to the corresponding light-emitting brightness of the first pixel group sensed by the first light-sensing unit and the corresponding light-emitting brightness of the second pixel group sensed by the second light-sensing unit under the preset gray scale picture so as to determine the target data voltage of the preset sub-pixel under the preset gray scale; the preset sub-pixels comprise sub-pixels in a first pixel group corresponding to the first photosensitive unit.
Optionally, the display device further includes a plurality of first data lines and a plurality of second data lines, each of the first data lines is electrically connected to a data voltage output port of the driving module, and each of the second data lines is electrically connected to a data voltage output port of the driving module; each first data line is connected with at least one column of sub-pixels in the first display area, and each second data line is connected with at least one column of sub-pixels in the second display area.
Optionally, the display device further includes an array substrate, the sub-pixel includes a first electrode, a light emitting layer, and a second electrode stacked from one side of the array substrate, the first data line and the first electrode are on the same layer, and the second data line is located in the array substrate.
Optionally, a connection portion on the same layer as the second data line is included, and the first data line is electrically connected to the data voltage output end of the driving module through the connection portion.
Optionally, the display device further includes a touch routing layer, the touch routing layer is disposed on the light emitting side of each sub-pixel in the first display area and the second display area, and the photosensitive module is disposed on one side of the touch routing layer away from the sub-pixels.
Optionally, the touch routing layer includes a grid-shaped touch routing, and the sub-pixels are located in a grid of the grid-shaped touch routing in the thickness direction of the display panel.
Optionally, the touch control device further comprises a sensing signal line, the sensing signal line is electrically connected with the photosensitive module and the driving module respectively, and the sensing signal line is arranged between the touch control routing layer and the photosensitive module; the touch control wiring layer comprises touch control signal lines, and orthographic projections of the sensing signal lines on the touch control wiring layer are at least overlapped with part of the touch control signal lines.
In a second aspect, an embodiment of the present invention further provides a method for debugging a display panel, where the method includes:
providing data initial data voltage signals corresponding to a preset gray scale for sub-pixels of a first display area and a second display area in the display panel so that the display panel displays a preset gray scale picture;
adjusting corresponding data voltage of a preset sub-pixel under a preset gray scale according to the difference between the brightness of a first pixel group and the brightness of a second pixel group sensed by a light sensing module under a preset gray scale picture, and taking the data voltage when the difference sensed by the light sensing module is smaller than a preset brightness threshold value as the target data voltage of the preset sub-pixel under the preset gray scale;
the preset sub-pixels comprise at least part of sub-pixels including a first pixel group in the first display area; and the target data voltage meets the condition that the difference between the luminous brightness of the first pixel group and the luminous brightness of the second pixel group under the preset gray scale is smaller than a preset brightness threshold value.
The display panel and the debugging method thereof provided by the embodiment of the invention have the advantages that the light-emitting sides of the first pixel group in the first display area and the second pixel group in the second display area are provided with the photosensitive modules, the photosensitive modules sense the light-emitting brightness of the first pixel group and the light-emitting brightness of the second pixel group and send the light-emitting brightness of the first pixel group and the light-emitting brightness of the second pixel group to the driving module, the driving module adjusts the corresponding data voltage of the preset sub-pixel under the preset gray scale according to the difference between the light-emitting brightness of the first pixel group and the light-emitting brightness of the second pixel group sensed by the photosensitive modules so as to determine the target data voltage of the preset sub-pixel under the preset gray scale, so as to adjust the light-emitting brightness of the preset sub-pixel in the first display area according to the target data voltage, and because the target data voltage meets the condition that the difference between the light-emitting brightness of the first pixel group and the light-emitting brightness of the second pixel group under the preset gray scale is smaller than the preset brightness threshold, thereby ensuring that the difference between the light-emitting brightness of the preset sub-pixels in the first display area and the light-emitting brightness of the second pixel group in the second display area is smaller. Because the preset sub-pixels comprise at least part of sub-pixels including the first pixel group in the first display area, and the brightness of the sub-pixels in the second display area is relatively uniform, the technical scheme of the embodiment of the invention can improve the uniformity of the display of the preset sub-pixels in the first display area and the second display area, and is further beneficial to improving the uniformity of the first display area and the second display area. And first display area is the printing opacity display area, and the printing opacity display area can be used as fingerprint identification district under the screen, consequently, the technical scheme of this embodiment is favorable to reducing the luminance difference of fingerprint identification district and other display areas outside the fingerprint identification district, improves the display uniformity including the display panel in fingerprint identification district under the screen.
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 diagram of another display panel according to an embodiment of the present invention;
FIG. 3 is a schematic structural diagram of another display panel in an embodiment of the invention;
FIG. 4 is a schematic cross-sectional view illustrating a display panel according to an embodiment of the present invention;
FIG. 5 is a schematic cross-sectional view of another display panel according to an embodiment of the present invention;
FIG. 6 is a top view of a display panel in an embodiment of the invention;
fig. 7 is a flowchart of a debugging method of a display panel in 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 to be construed as limiting the invention. It should be further noted that, for the convenience of description, only some structures related to the present invention are shown in the drawings, not all of them.
As described in the background art, the conventional display panel including a light-transmitting display region has a problem of non-uniform display of a screen body. The inventor has found that the above problems occur because the camera, the fingerprint recognition module and other structures are usually disposed below the display panel, in order to ensure the normal operation of the camera and the fingerprint identification module, the area of the display panel corresponding to the camera and the fingerprint identification unit needs to be transparent, that is, the display panel needs to include a transparent display region, and in order to realize the transparency, for example, the module needs to be opened in the transparent display region of the display module, and the other positions are not opened, so that the display panel has structural difference between the light-transmitting display area and the normal display area (the display area without opening), when the sub-pixels in the corresponding area of the camera and the fingerprint identification unit and the sub-pixels in the normal display area provide the same data voltage, the brightness of the corresponding areas of the display screen body camera and the fingerprint identification unit is different from the brightness of the normal display area, so that the problem of uneven display of the screen body is caused.
In view of the above problems, an embodiment of the present invention provides a display panel, and fig. 1 is a schematic structural view of the display panel provided by the embodiment of the present invention, and referring to fig. 1, the display panel is divided into a first display area AA1 and a second display area AA2, where the first display area AA1 is a transparent display area; a plurality of sub-pixels 100 are disposed in each of the first display area AA1 and the second display area AA 2;
the display panel includes a photosensitive module 300 and a driving module 400; the photosensitive module 300 is disposed on the light-emitting side of the first pixel group 110 and the light-emitting side of the second pixel group 210; wherein the first pixel group 110 includes at least a portion of sub-pixels in the first display area AA1, and the second pixel group 210 includes at least a portion of sub-pixels in the second display area AA 2; the light sensing module 300 is used for sensing the light emitting brightness of the first pixel group 110 and the light emitting brightness of the second pixel group 210;
the driving module 400 is electrically connected to the photosensitive module 300, and configured to adjust a data voltage corresponding to the preset sub-pixel at the preset gray scale according to a difference between the luminance of the first pixel group 110 and the luminance of the second pixel group 210 sensed by the photosensitive module 300 in the preset gray scale picture, so as to determine a target data voltage of the preset sub-pixel at the preset gray scale; wherein the predetermined sub-pixels include at least a portion of the sub-pixels within the first pixel group 110 in the first display area AA 1; the target data voltage satisfies that the difference between the luminance of the first pixel group 110 and the luminance of the second pixel group 210 under the preset gray scale is smaller than the preset luminance threshold.
Alternatively, the first display area AA1 may be a fingerprint recognition area or a camera area of the display panel. The difference between the light-emitting luminance of the first pixel group 110 and the light-emitting luminance of the second pixel group 210 may be a difference obtained by a difference between the light-emitting luminance of the first pixel group 110 and the light-emitting luminance of the second pixel group 210, or a ratio obtained by dividing the light-emitting luminance of the first pixel group 110 and the light-emitting luminance of the second pixel group 210, and may also represent other calculation manners of the difference between the light-emitting luminance of the first sub-pixel 110 and the light-emitting luminance of the second pixel group 210, which is not specifically limited in the embodiment of the present invention.
The preset gray scale image may be a gray scale image displayed by the display panel when the sub-pixels in the first display area AA1 and the sub-pixels in the second display area AA2 are turned on by a preset gray scale. Optionally, the preset luminance threshold may be set according to a requirement on luminance uniformity of the display panel, and optionally, when the difference between the luminances of the sub-pixels in the first display area AA1 and the second display area AA2 in the display panel is required to be 0, the preset luminance threshold is 0, and at this time, the corresponding target data voltage may be a data voltage at which the luminance of the sub-pixels in the first display area AA1 and the luminance of the sub-pixels in the second display area AA2 are kept consistent.
With reference to fig. 1, in the technical solution of the present embodiment, the first pixel group 110 is located in the first display area AA1, the first pixel group 110 includes at least a part of sub-pixels in the first display area AA1, the second pixel group 210 is located in the second display area AA2, the second pixel group 210 includes at least a part of sub-pixels in the second display area AA2, and the light sensing module 300 is disposed on the light emitting side of the first pixel group 110 and the light emitting side of the second pixel group 210. Optionally, the driving module 400 simultaneously provides the same data voltage corresponding to the preset gray scale to the sub-pixel in the first display area AA1 and the sub-pixel in the second display area AA2, and simultaneously lights the sub-pixel in the first display area AA1 and the sub-pixel in the second display area AA2, the light sensing module 300 senses the light emitting brightness of the first pixel group 110 and the light emitting brightness of the second pixel group 210 under the same preset gray scale image and sends the light emitting brightness to the driving module 400, the driving module 400 adjusts the data voltage corresponding to the preset sub-pixel under the preset gray scale according to the difference between the light emitting brightness of the first pixel group 110 and the light emitting brightness of the second pixel group 210 under the same preset gray scale image sensed by the light sensing module 300 to determine the target data voltage of the preset sub-pixel under the preset gray scale image, so as to adjust the light emitting brightness of the preset sub-pixel in the first display area AA1 according to the target data voltage, and the target data voltage meets the difference between the light emitting brightness of the first pixel group and the second pixel under the preset gray scale image And is smaller than the predetermined brightness threshold, so as to ensure that the difference between the light-emitting brightness of the predetermined sub-pixels in the first display area AA1 and the light-emitting brightness of the second pixel group 210 in the second display area AA2 is smaller. Because the preset sub-pixels include at least part of sub-pixels including the first pixel group 210 in the first display area AA1, and the brightness of the sub-pixels in the second display area AA2 is relatively uniform, the technical solution of the embodiment of the present invention can improve the uniformity of the display of the preset sub-pixels in the first display area AA1 and the second display area AA2, and is further beneficial to improve the uniformity of the display of the first display area AA1 and the second display area AA 2. And first display area AA1 is the printing opacity display area, and the printing opacity display area can be used as fingerprint identification district under the screen, therefore, the technical scheme of this embodiment is favorable to reducing the luminance difference of fingerprint identification district and other display areas outside the fingerprint identification district, improves the display uniformity of the display panel including fingerprint identification district under the screen.
It should be noted that the preset gray scale may include one gray scale value, may include a plurality of gray scale values, and may include all gray scale values in a gray scale range that can be displayed by the display panel. For example, for any one gray level value included in the preset gray scale, the light sensing module 300 may sense the luminance of the first pixel group 110 in the first display area AA1 and the luminance of the second pixel group 210 in the second display area AA2 under the gray level value, the driving module 400 may adjust the data voltage corresponding to the preset sub-pixel in the first display area AA1 according to the luminance difference between the first pixel group 110 in the first display area AA1 and the luminance difference between the second pixel group 210 in the second display area AA2, during the adjustment, the light sensing module 300 may obtain the luminance of the first pixel group 110 and the luminance difference between the first pixel group 110 in the first display area AA1 and the luminance difference between the second pixel group 210 in the second display area AA2, and when the luminance difference between the first pixel group 110 in the first display area AA1 and the second pixel group 210 in the second display area AA2 is smaller than the preset luminance threshold, the data voltage provided to the preset sub-pixel at this time is used as the target data voltage to ensure that the luminance of the first pixel group AA1 and the second pixel group 2 in the first display area AA1 and the second pixel group 2 are in the second display area AA2 The difference is small.
In the display panel provided by this embodiment, the light-emitting sides of the first pixel group in the first display area and the second pixel group in the second display area are provided with the photosensitive modules, the photosensitive modules sense the light-emitting brightness of the first pixel group and the light-emitting brightness of the second pixel group and send the light-emitting brightness of the first pixel group and the light-emitting brightness of the second pixel group to the driving module, the driving module adjusts the data voltage corresponding to the preset sub-pixel under the preset gray scale according to the difference between the light-emitting brightness of the first pixel group and the light-emitting brightness of the second pixel group sensed by the photosensitive modules to determine the target data voltage of the preset sub-pixel under the preset gray scale, so as to adjust the light-emitting brightness of the preset sub-pixel in the first display area according to the target data voltage, and the difference between the light-emitting brightness of the first pixel group and the light-emitting brightness of the second pixel group under the preset gray scale is smaller than the preset brightness threshold, thereby ensuring that the difference between the light-emitting brightness of the preset sub-pixel in the first display area and the light-brightness of the second pixel group in the second display area Is relatively small. The preset sub-pixels comprise at least part of sub-pixels including the first pixel group in the first display area, and the brightness of the sub-pixels in the second display area is uniform, so that the technical scheme of the embodiment of the invention can improve the display uniformity of the preset sub-pixels in the first display area and the second display area, and is favorable for improving the display uniformity of the first display area and the second display area. And first display area is the printing opacity display area, and the printing opacity display area can be used as fingerprint identification district under the screen, consequently, the technical scheme of this embodiment is favorable to reducing the luminance difference of fingerprint identification district and other display areas outside the fingerprint identification district, improves the display uniformity including the display panel in fingerprint identification district under the screen.
With continued reference to FIG. 1, the predetermined sub-pixels may optionally include all of the sub-pixels in the first display area AA 1.
Specifically, the predetermined sub-pixels include all sub-pixels in the first display area AA 1. The light sensing module 300 senses the brightness of the first pixel group 110 in the first display area AA1 and the brightness of the second pixel group 210 in the second display area AA2 under the same preset gray scale image and sends the same to the driving module 400, the driving module 400 adjusts the corresponding data voltages of all the sub-pixels in the first display area AA1 under the preset gray scale according to the difference between the brightness of the first pixel group 110 in the first display area AA1 and the brightness of the second pixel group 210 in the second display area AA2 under the same preset gray scale image so as to determine the target data voltages of all the sub-pixels in the first display area AA1 under the preset gray scale, and further can adjust the brightness of all the sub-pixels in the first display area AA1 according to the target data voltages, so that the difference between the brightness of all the sub-pixels in the first display area AA1 under the same preset gray scale image and the brightness of the sub-pixels in the second display area AA2 is small, and the uniformity of the display of the first display area AA1 and the second display area AA2 may be improved.
Fig. 2 is a schematic structural diagram of another display panel in an embodiment of the present invention, referring to fig. 2, in an alternative implementation, a plurality of first pixel groups 110 are disposed in a first display area AA1, such as a first pixel group 111 and a second first pixel group 112 in fig. 2, and a photosensitive module includes first photosensitive units 310 corresponding to the first pixel groups 110 one to one, each of the first photosensitive units is disposed on a light emitting side of the corresponding first pixel group, for example, the first pixel group 111 corresponds to the first photosensitive unit 311 one to one in fig. 2, the first photosensitive unit 311 is disposed on a light emitting side of the first pixel group 111, the second first pixel group 112 corresponds to the second first photosensitive unit 312 one to one, and the second first photosensitive unit 312 is disposed on a light emitting side of the second first pixel group 112; the photosensitive module further includes a second photosensitive unit 320, the second photosensitive unit 320 is disposed on the light emitting side of the second pixel group 210, for example, the second photosensitive unit 320 is disposed on the light emitting side of the second pixel group 210 in fig. 2; the first photosensitive unit 310 and the second photosensitive unit 320 are respectively electrically connected to the driving module 400, for example, in fig. 2, the first photosensitive unit 311, the second first photosensitive unit 312, and the second photosensitive unit 320 are electrically connected to the driving module 400;
the driving module 400 is configured to adjust a data voltage corresponding to a preset sub-pixel at a preset gray scale according to the luminance of the corresponding first pixel group 110 sensed by the first photosensitive unit 310 and the luminance of the corresponding second pixel group 210 sensed by the second photosensitive unit 320 in a preset gray scale image to determine a target data voltage of the preset sub-pixel at the preset gray scale; the preset sub-pixels include sub-pixels within the first pixel group 110 corresponding to the first photosensitive cell 310.
The driving module 400 adjusts the corresponding data voltage of the corresponding first pixel group 110 at the preset gray scale according to the difference between the luminance of the corresponding first pixel group 110 sensed by each first photosensitive unit 310 and the luminance of the corresponding second pixel group 210 of the second display area AA2, so as to determine the target data voltage of the corresponding first pixel group 110 at the preset gray scale, and adjust the luminance of the corresponding first pixel group according to the target data voltage of each first pixel group, so that the difference between the luminance of the different first pixel groups in the first display area AA1 and the luminance of the corresponding second pixel group 210 in the second display area AA2 is small, thereby improving the display uniformity of the first display area AA1 and the second display area AA 2.
Specifically, referring to fig. 2, the first photosensitive unit 311 senses the light emitting luminance of the first pixel group 110, the second photosensitive unit 320 senses the light emitting luminance of the second pixel group 210 under the same preset gray scale image, and the driving module 400 adjusts the data voltage corresponding to the sub-pixel in the first pixel group 111 under the preset gray scale according to the difference between the light emitting luminance of the first pixel group 111 sensed by the first photosensitive unit 311 and the light emitting luminance of the second pixel group 210 under the same preset gray scale image sensed by the second photosensitive unit 320 under the same preset gray scale image to determine the target data voltage of the sub-pixel in the first pixel group 111 under the preset gray scale, so that the difference between the light emitting luminance of the sub-pixel in the first pixel group 111 and the light emitting luminance of the sub-pixel in the second pixel group 210 is small. Similarly, under the same preset gray scale picture, the second first light sensing unit 312 senses the light emitting brightness of the second first pixel group 112, and the driving module 400 adjusts the data voltage corresponding to the sub-pixels in the second first pixel group 112 at the preset gray scale according to the difference between the light emitting brightness of the second first pixel group 112 sensed by the second first light sensing unit 312 and the light emitting brightness of the second pixel group 210 under the same preset gray scale picture sensed by the second light sensing unit 320 under the same preset gray scale picture to determine the target data voltage of the sub-pixels in the second first pixel group 112 at the preset gray scale, so that the difference between the light emitting brightness of the sub-pixels in the second first pixel group 112 and the light emitting brightness of the sub-pixels in the second pixel group 210 is smaller. Similarly, the other first light sensing units in the first display area AA1 sense the difference between the luminance of the corresponding first pixel group in the same preset gray scale image and the luminance of the corresponding second pixel group sensed by the second light sensing unit to adjust the corresponding data voltage of the sub-pixels in the first pixel group at the preset gray scale to determine the target data voltage of the sub-pixels in the first pixel group at the preset gray scale, so that the difference between the luminance of the sub-pixels in each first pixel group and the luminance of the sub-pixels in the second pixel group 210 is smaller, and the display uniformity of the first display area AA1 and the second display area AA2 is improved.
It should be noted that, fig. 2 is only exemplarily illustrated that the sub-pixels in the first pixel group 110 are located in the same column and the sub-pixels in the second pixel group 210 are located in the same column in the display panel, the sub-pixels included in the first pixel group 110 may not be located in the same column, the sub-pixels included in the second pixel group 210 may not be located in the same column, that is, the sub-pixels included in the first pixel group 110 may be arranged in any manner, the sub-pixels included in the second pixel group 210 may be arranged in any manner, for example, the sub-pixels included in the first pixel group 110 and the second pixel group 210 may be determined according to the shape of the photosensitive module 300, it is only required to ensure that the light rays acquired to the sub-pixels in the first pixel group 110 and the second pixel group 210 can be incident to the photosensitive module 300, the embodiment of the present invention is not limited in detail herein, and the arrangement of the sub-pixels in the first pixel group 110 corresponds to the arrangement of the sub-pixels in the second pixel group 210.
In an implementation manner, fig. 3 is a schematic structural diagram of another display panel provided in the embodiment of the present disclosure, where the display panel further includes a plurality of first data lines and a plurality of second data lines, each of the first data lines is electrically connected to a data voltage output port of the driving module, and each of the second data lines is electrically connected to a data voltage output port of the driving module; each first data line is connected to at least one column of sub-pixels in the first display region, and each second data line is connected to at least one column of sub-pixels 100 in the second display region.
The column direction of the sub-pixel 100 is the extending direction of the first data line and the second data line.
Specifically, referring to fig. 3, the display panel further includes a plurality of first data lines (e.g., in fig. 3, a first data line L1 and a second first data line L2, etc.) and a plurality of second data lines (e.g., in fig. 3, a first second data line S1 and a second data line S2, etc.), the first data line L1 is electrically connected to the first data voltage output port a1 of the driving module 400, the second first data line L2 is electrically connected to the second data voltage output port a2 of the driving module 400, the first second data line S1 is electrically connected to the third data voltage output port A3 of the driving module 400, and the second data line S2 is electrically connected to the fourth data voltage output port a4 of the driving module 400. The first data line L1 is connected to the first column of sub-pixels in the first display area AA 1; the second first data line L2 is connected to the second column of sub-pixels in the first display area AA 1; the first data line S1 is connected to the first column of sub-pixels in the second display area AA 2; the second data line S2 connects the subpixels of the second column in the second display area AA 2. The display panel of the embodiment can transmit the data voltage to the sub-pixels in the first display area through the first data line, and transmit the data voltage to the sub-pixels in the second display area through the second data line. Compared with the prior art, the data voltage lines are independently arranged for the sub-pixels in the first display area, when the target data voltage corresponding to the sub-pixels in the first display area is determined, the same initial data voltage corresponding to the preset gray scale needs to be firstly provided for the sub-pixels in the first display area and the second display area in the display panel, then the target data voltage corresponding to the sub-pixels in the first display area is determined according to the brightness difference between the first pixel group and the second pixel group, and then the data voltage of the sub-pixels in the first display area is adjusted.
Optionally, fig. 4 is a schematic cross-sectional structure diagram of a display panel provided in an embodiment of the present invention, where the display panel shown in fig. 4 may correspond to the display panel shown in fig. 3 and cut along a section line B-B', and referring to fig. 3 and fig. 4, the display panel further includes an array substrate 10, the sub-pixels include a first electrode 20, a light emitting layer 30, and a second electrode 40 stacked from one side of the array substrate 10, the first data line 101 is in the same layer as the first electrode 20, and the second data line 102 is located in the array substrate 10.
In addition, referring to fig. 4, the second data line 102 may be located in the same layer as the source electrode 11 (or the drain electrode) in the array substrate 10. In the display panel, the number of data lines included in the layer where the second data line 102 is located is large, and thus, if the first data line 101 and the second data line 102 are disposed on the same layer, the difficulty of wiring is increased. In the display panel of the embodiment, the first data line 101 and the first electrode 40 are disposed on the same layer, so that the wiring is relatively easier to implement.
With continued reference to fig. 3 and 4, optionally, the array substrate 10 includes a connection portion 103 (not shown in fig. 4) on the same layer as the second data line 102. The first data line 101 is electrically connected to a data voltage output terminal of the driving module through a connection part 103. The connecting parts can be multiple, each first data line is correspondingly connected with one connecting part, and each first data line is electrically connected with one data voltage output end of the driving module through the corresponding connecting part.
Fig. 5 is a schematic cross-sectional structure view of another display panel according to an embodiment of the present invention, and referring to fig. 5, in an alternative implementation, the display panel further includes a touch routing layer 60, the touch routing layer 60 is disposed on the light emitting side of each sub-pixel in the first display area and the second display area, and the photosensitive module is disposed on a side of the touch routing layer 60 away from the sub-pixel.
Specifically, referring to fig. 5, the display panel includes an encapsulation layer 50 and a touch routing layer 60, the encapsulation layer 50 is located on a side of the second electrode 40 away from the array substrate 10, and the touch routing layer 60 is located on a side of the encapsulation layer 50 away from the array substrate 10. The photosensitive module 300 is disposed on a side of the touch wiring layer 60 away from the sub-pixels, i.e., on a side of the touch wiring layer 60 away from the second electrodes 40 of the sub-pixels.
The photosensitive module 300 is disposed on a side of the touch routing layer 60 away from the second electrode 40 of the sub-pixel, and further receives brightness of light emitted by the sub-pixel in the first display area and the second display area.
Fig. 6 is a top view of a display panel according to an embodiment of the present invention, where the top view shown in fig. 6 may correspond to the cross-sectional view shown in fig. 5, and the top view of the display panel shown in fig. 6 only shows a partial structure of the display panel, and optionally, the touch routing layer includes a grid-shaped touch routing, and in the thickness direction of the display panel, the sub-pixels are located in a grid of the grid-shaped touch routing.
Specifically, referring to fig. 6, the touch routing layer includes a grid-shaped touch routing, the grid-shaped touch routing is composed of a plurality of grid-shaped patterns 62 and a connection structure (a structure between two adjacent grid-shaped patterns), and in the thickness direction of the display panel, each sub-pixel is respectively located in a grid of the grid-shaped touch routing, for example, in fig. 6, the sub-pixel 100 is located in one grid of the grid-shaped pattern 62, and one sub-pixel corresponds to each of the other grids of the grid-shaped pattern 62, and similarly, one sub-pixel corresponds to each of the other grids of the other grid-shaped patterns. Therefore, in the thickness direction of the display panel, each sub-pixel is located in the grid of the grid-shaped touch-control wires, so that the phenomenon that the display effect of the display panel is influenced due to the fact that the grid-shaped touch-control wires block the light-emitting paths of the sub-pixels, and the light-emitting brightness of the sub-pixels is influenced can be avoided.
Optionally, with continued reference to fig. 5, the display panel further includes a sensing signal line 70, the sensing signal line 70 is electrically connected to the photosensitive module and the driving module respectively, and the sensing signal line 70 is disposed between the touch wiring layer 60 and the photosensitive module 300; the touch wiring layer 60 includes touch signal lines 61, and an orthographic projection of the sensing signal lines 70 on the touch wiring layer 60 coincides with at least a portion of the touch signal lines 61.
The sensing signal line 70 is used for connecting the photosensitive module and the driving module, and the orthographic projection of the sensing signal line 70 on the touch wiring layer 60 is at least overlapped with a part of the touch signal line 61, so that the sensing signal line 70 does not affect the light emission of each sub-pixel while ensuring the normal signal transmission of the photosensitive module and the driving module.
Optionally, the sensing signal line 70 may also be set to have a complete coincidence between the orthographic projection of the sensing signal line 70 on the touch routing layer 60 and the touch signal line 61, so as to avoid the sensing signal line 70 blocking the light emitting path of the sub-pixel to influence the light emitting brightness of the sub-pixel, thereby being more beneficial to improving the display effect of the display panel.
In addition, the display panel may further include an organic dielectric layer, which is located between the touch routing layer 60 and the sensing signal line 70, and is used to isolate the touch routing layer 60 from the sensing signal line 70, so as to avoid problems such as line crossing and short circuit between the isolated touch routing layer 60 and the sensing signal line 70.
Fig. 7 is a flowchart of a debugging method for a display panel according to an embodiment of the present invention, which is applicable to implementation of a debugging process of a display panel in this embodiment, and the method may be used to debug a display panel according to any of the above embodiments of the present invention, in a technical solution of this embodiment, referring to fig. 7, a specific debugging method includes:
The same data voltage signal is provided by providing initial data voltage signals corresponding to the preset gray scale for the sub-pixels of the first display area and the second display area in the display panel so as to light the sub-pixels of the first display area and the sub-pixels of the second display area, so that the display panel displays a preset gray scale picture, and a basis and a premise are provided for subsequent adjustment of the brightness of the display panel.
The preset sub-pixels comprise at least part of sub-pixels including a first pixel group in the first display area; the target data voltage meets the condition that the difference between the luminance of the first pixel group and the luminance of the second pixel group under the preset gray scale is smaller than a preset luminance threshold value.
The method comprises the following steps of adjusting corresponding data voltage of a preset sub-pixel under a preset gray scale according to the difference between the brightness of a first pixel group and the brightness of a second pixel group sensed by a photosensitive module under a preset gray scale picture, wherein the specific adjusting method comprises the following steps: the driving module adjusts the brightness of the preset sub-pixel for multiple times with smaller data voltage according to the difference between the brightness of the first pixel group and the brightness of the second pixel group until the difference between the brightness of the preset sub-pixel and the brightness of the second pixel group is smaller. For example, the driving module may first perform a first adjustment on the preset sub-pixel by increasing a data voltage of 0.5V, the photosensitive module senses the luminance of the first pixel group and the luminance of the second pixel group after the first adjustment, and when the luminance difference between the two is still greater than the preset luminance threshold, the driving module does not perform the second adjustment on the preset sub-pixel by increasing a data voltage of 1V, the photosensitive module senses the luminance of the first pixel group and the luminance of the second pixel group after the second adjustment, and when the luminance difference between the two is less than the preset luminance threshold, the driving module does not perform the second adjustment again, otherwise, the driving module continues the adjustment in sequence until the luminance difference between the luminance of the preset sub-pixel and the luminance of the second pixel group is less than the preset luminance threshold. Of course, the data voltage may also be reduced based on the original data voltage for adjustment, and the embodiment of the present invention is not limited in this respect.
The brightness of the first display area can be adjusted in real time according to the difference between the brightness of the first pixel group and the brightness of the second pixel group under the same preset gray scale picture sensed by the photosensitive module in real time, so that the brightness of the first display area and the brightness of the second display area are kept consistent under the same gray scale picture, and the display uniformity of the first display area and the second display area of the display panel is improved.
It should be noted that the debugging method of the display panel provided in the embodiment of the present invention may be used for adjusting the brightness uniformity of the first display area and the second display area (i.e., the FOD and the other display areas of the screen) before the display panel leaves the factory and after the display panel is used for a period of time. The method can also be used for adjusting the brightness uniformity of the first display area and the second display area after the display panel is delivered from a factory and in the using process of the display panel.
In the method for debugging the display panel of this embodiment, the data voltage corresponding to the preset sub-pixel in the preset gray scale is adjusted according to the difference between the luminance of the first pixel group and the luminance of the second pixel group sensed by the photosensitive module in the preset gray scale picture, and the data voltage when the difference sensed by the photosensitive module is smaller than the preset luminance threshold is used as the target data voltage of the preset sub-pixel in the preset gray scale, so as to adjust the luminance of the preset sub-pixel in the first display area according to the target data voltage, and as the target data voltage meets the condition that the difference between the luminance of the first pixel group and the luminance of the second pixel group in the preset gray scale is smaller than the preset luminance threshold, it is ensured that the difference between the luminance of the preset sub-pixel in the first display area and the luminance of the second pixel group in the second display area is smaller. The preset sub-pixels comprise at least part of sub-pixels including the first pixel group in the first display area, and the brightness of the sub-pixels in the second display area is uniform, so that the technical scheme of the embodiment of the invention can improve the display uniformity of the preset sub-pixels in the first display area and the second display area, and is favorable for improving the uniformity of the first display area and the second display area. And first display area is the printing opacity display area, and the printing opacity display area can be used as fingerprint identification district under the screen, and consequently, the technical scheme of this embodiment is favorable to reducing the luminance difference of fingerprint identification district and other display areas outside the fingerprint identification district, improves the display uniformity of the display panel including fingerprint identification district under the screen.
It is to be noted that the foregoing description is only exemplary of the invention and that the principles of the technology may be 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 (8)
1. A display panel is characterized by being divided into a first display area and a second display area, wherein the first display area is a light-transmitting display area; a plurality of sub-pixels are arranged in the first display area and the second display area;
the display panel comprises a photosensitive module and a driving module; the photosensitive modules are arranged on the light emergent side of the first pixel group and the light emergent side of the second pixel group; wherein the first pixel group comprises at least part of sub-pixels in the first display area, and the second pixel group comprises at least part of sub-pixels in the second display area; the photosensitive module is used for sensing the light-emitting brightness of the first pixel group and the light-emitting brightness of the second pixel group;
the driving module is electrically connected with the photosensitive module and used for adjusting the corresponding data voltage of the preset sub-pixel under the preset gray scale according to the difference between the brightness of the first pixel group and the brightness of the second pixel group sensed by the photosensitive module under the preset gray scale picture so as to determine the target data voltage of the preset sub-pixel under the preset gray scale; the preset sub-pixels comprise at least part of sub-pixels including a first pixel group in the first display area; the target data voltage meets the condition that the difference between the luminous brightness of the first pixel group and the luminous brightness of the second pixel group under a preset gray scale is smaller than a preset brightness threshold value;
the driving module further comprises a plurality of first data lines and a plurality of second data lines, wherein each first data line is electrically connected with a data voltage output port of the driving module, and each second data line is electrically connected with a data voltage output port of the driving module; each first data line is connected with at least one column of sub-pixels in the first display area, and each second data line is connected with at least one column of sub-pixels in the second display area;
the display panel further comprises an array substrate, the sub-pixels comprise a first electrode, a light emitting layer and a second electrode which are stacked from one side of the array substrate, the first data lines and the first electrodes are on the same layer, and the second data lines are located in the array substrate and on the same layer as the source electrodes or the drain electrodes.
2. The display panel according to claim 1, wherein the predetermined sub-pixels comprise all sub-pixels in the first display region.
3. The display panel according to claim 1, wherein the first display area has a plurality of first pixel groups, the photosensitive module includes first photosensitive units corresponding to the first pixel groups one by one, and each of the first photosensitive units is disposed on a light-emitting side of the corresponding first pixel group; the photosensitive module further comprises a second photosensitive unit, and the second photosensitive unit is arranged on the light emitting side of the second pixel group; the first photosensitive unit and the second photosensitive unit are electrically connected with the driving module respectively;
the driving module is used for adjusting the corresponding data voltage of the corresponding preset sub-pixel under the preset gray scale according to the brightness of the corresponding first pixel group sensed by the first photosensitive unit and the brightness of the corresponding second pixel group sensed by the second photosensitive unit under the preset gray scale picture so as to determine the target data voltage of the preset sub-pixel under the preset gray scale; the preset sub-pixels comprise sub-pixels in a first pixel group corresponding to the first photosensitive unit.
4. The display panel according to claim 1, wherein the array substrate comprises a connection portion on the same layer as the second data line, and the first data line is electrically connected to the data voltage output terminal of the driving module through the connection portion.
5. The display panel according to claim 1, further comprising a touch routing layer, wherein the touch routing layer is disposed on a light emitting side of each of the sub-pixels in the first display area and the second display area, and the photosensitive module is disposed on a side of the touch routing layer away from the sub-pixels.
6. The display panel of claim 5, wherein the touch routing layer comprises grid-like touch routing, and the sub-pixels are located in a grid of the grid-like touch routing in a thickness direction of the display panel.
7. The display panel according to claim 5 or 6, further comprising a sensing signal line electrically connected to the photosensitive module and the driving module, respectively, and disposed between the touch routing layer and the photosensitive module; the touch routing layer comprises touch signal lines, and orthographic projections of the sensing signal lines on the touch routing layer at least coincide with partial touch signal lines.
8. A debugging method of a display panel is characterized by comprising the following steps:
providing data initial data voltage signals corresponding to a preset gray scale for sub-pixels of a first display area and a second display area in the display panel so that the display panel displays a preset gray scale picture;
adjusting corresponding data voltage of a preset sub-pixel under a preset gray scale according to the difference between the brightness of a first pixel group and the brightness of a second pixel group sensed by a light sensing module under a preset gray scale picture, and taking the data voltage when the difference sensed by the light sensing module is smaller than a preset brightness threshold value as the target data voltage of the preset sub-pixel under the preset gray scale;
the preset sub-pixels comprise at least part of sub-pixels including a first pixel group in the first display area; the target data voltage meets the condition that the difference between the luminous brightness of the first pixel group and the luminous brightness of the second pixel group under a preset gray scale is smaller than a preset brightness threshold value;
the display panel further comprises a plurality of first data lines and a plurality of second data lines, wherein each first data line is electrically connected with a data voltage output port of the driving module, and each second data line is electrically connected with a data voltage output port of the driving module; each first data line is connected with at least one column of sub-pixels in the first display area, and each second data line is connected with at least one column of sub-pixels in the second display area;
the display panel further comprises an array substrate, the sub-pixels comprise a first electrode, a light emitting layer and a second electrode which are arranged in a stacking mode from one side of the array substrate, the first data lines and the first electrodes are on the same layer, and the second data lines are located in the array substrate and on the same layer as the source electrodes or the drain electrodes.
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| CN112419948B (en) * | 2020-11-30 | 2023-03-10 | 京东方科技集团股份有限公司 | Display substrate, control method thereof and display device |
| CN114596812B (en) * | 2020-12-03 | 2024-01-30 | 北京小米移动软件有限公司 | Display screen indentation compensation method, compensation device and electronic equipment |
| CN112562587A (en) * | 2020-12-11 | 2021-03-26 | 昆山国显光电有限公司 | Display panel brightness compensation method and device and display panel |
| CN112419950B (en) * | 2020-12-15 | 2022-10-04 | 合肥维信诺科技有限公司 | Display difference judging method and system of display device and display device |
| CN113112950A (en) * | 2021-04-27 | 2021-07-13 | 合肥维信诺科技有限公司 | Image display method, signal generation device, display device, and storage medium |
| CN215868587U (en) * | 2021-05-28 | 2022-02-18 | Oppo广东移动通信有限公司 | Display panel and display device |
| CN113470576A (en) * | 2021-06-30 | 2021-10-01 | 合肥维信诺科技有限公司 | Display screen evaluation method, device, equipment and computer readable storage medium |
| CN114170984B (en) * | 2021-11-30 | 2023-06-23 | 重庆惠科金渝光电科技有限公司 | Display panel driving method and display panel |
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