CN117079617B

CN117079617B - Brightness adjusting method for display panel and display panel

Info

Publication number: CN117079617B
Application number: CN202311318044.4A
Authority: CN
Inventors: 张洋; 吴瀚; 袁海江
Original assignee: HKC Co Ltd
Current assignee: HKC Co Ltd
Priority date: 2023-10-12
Filing date: 2023-10-12
Publication date: 2024-02-13
Anticipated expiration: 2043-10-12
Also published as: CN117079617A

Abstract

The application provides a brightness adjustment method of a display panel and the display panel, and belongs to the technical field of display equipment. According to the data to be displayed, calculating to obtain a first gray scale voltage for driving each display subarea and a target gray scale voltage for driving a plurality of display subareas in the display panel; therefore, the absolute value of the difference between the target gray-scale voltage and the public voltage can be used as a standard voltage difference, and the public voltage corresponding to each display subarea can be adjusted according to the standard voltage difference and the first gray-scale voltage of each display subarea, namely the public voltage corresponding to each display subarea is adjusted, so that the absolute value of the difference between the first gray-scale voltage of each display subarea and the adjusted public voltage is equal to the standard voltage difference. By adjusting the public voltage corresponding to each display subarea, the display brightness of each display subarea is the same, so that the problem of uneven display brightness of the display panel can be solved.

Description

Brightness adjusting method for display panel and display panel

Technical Field

The present disclosure relates to the field of display panels, and particularly to a brightness adjustment method of a display panel and a display panel.

Background

As the display panel is increasingly developed toward larger size and higher resolution, the charging time corresponding to the pixels in the display panel is shorter and shorter, and the charging difference between the pixels at different positions of the display panel is also increased as the size of the display panel is larger because the positions of the pixels are related to the charging order.

Meanwhile, since an integrated circuit (integrated circuit, abbreviated as IC) is mounted at the bottom end of the display panel, the IC provides gray scale voltages to each display sub-region of the display panel through the power line. However, due to the difference in Resistance-capacitance (RC loading) with the power lines, the brightness of different display sub-areas on the display panel is also different, i.e. the brightness of the display panel is not uniform.

Disclosure of Invention

The main objective of the embodiments of the present application is to provide a brightness adjustment of a display panel and a display panel. The method aims at setting standard pressure difference to adjust the public voltage of each display subarea through the standard pressure difference so that the display brightness of each display subarea is the same, and the problem of uneven display brightness of a display panel can be solved.

To achieve the above object, a first aspect of an embodiment of the present application provides a method for adjusting brightness of a display panel, where the display panel includes a plurality of display sub-areas, and each of the display sub-areas is correspondingly connected to a common voltage, the method includes:

According to the data to be displayed, calculating to obtain a first gray scale voltage for driving each display subarea and a target gray scale voltage for driving a plurality of display subareas in the display panel;

taking the absolute value of the difference between the target gray-scale voltage and the public voltage as a standard voltage difference;

and adjusting the public voltage corresponding to each display subarea so that the absolute value of the difference value between the first gray-scale voltage of each display subarea and the adjusted public voltage is equal to the standard voltage difference.

In one embodiment of the present application, calculating the first gray scale voltages for driving the display sub-regions according to the data to be displayed includes:

acquiring gray scale voltages applied to each pixel unit on each display subarea according to data to be displayed;

and carrying out average calculation on the gray scale voltage on each pixel unit to obtain a first gray scale voltage for driving the display subarea.

In one embodiment of the present application, calculating a target gray scale voltage for driving a plurality of display sub-regions in the display panel according to data to be displayed includes:

acquiring the first gray scale voltage corresponding to each display subarea in a plurality of display subareas;

And carrying out average calculation on the first gray scale voltages corresponding to each display subarea to obtain target gray scale voltages for driving a plurality of display subareas in the display panel.

In one embodiment of the present application, adjusting the common voltage corresponding to each display sub-region includes:

according to data to be displayed, calculating to obtain a gray scale voltage for driving a target area in the display panel to be the target gray scale voltage, wherein the target area comprises a plurality of display subareas which are continuously adjacent;

adjusting the common voltage corresponding to each display subarea in the target area so that the absolute value of the difference value between the first gray-scale voltage of each display subarea in the target area and the adjusted common voltage is equal to the standard voltage difference;

judging whether brightness difference exists between the adjusted target area and a display subarea adjacent to the target area;

and when the brightness difference exists between the adjusted target area and the display subarea adjacent to the target area, listing the display subarea adjacent to the target area in the target area, and returning to the step of calculating the gray scale voltage for driving the target area in the display panel to be the target gray scale voltage according to the data to be displayed.

In one embodiment of the present application, when there is no brightness difference between the adjusted target area and a display sub-area adjacent to the target area, the method includes:

taking each display subarea except the target area and the display subarea adjacent to the target area in the display panel as an unadjusted area;

the first gray-scale voltage of each display subarea in the unadjusted area is obtained, and the common voltage corresponding to each display subarea in the unadjusted area is adjusted, so that the absolute value of the difference between the first gray-scale voltage of each display subarea and the adjusted common voltage is equal to the standard pressure difference.

In an embodiment of the present application, the adjusting the common voltage corresponding to each display sub-area so that an absolute value of a difference between the first gray-scale voltage of each display sub-area and the adjusted common voltage is equal to the standard voltage difference includes:

taking the absolute value of the difference value between the first gray-scale voltage and the common voltage as a target voltage difference;

comparing the target voltage difference with the standard voltage difference when the first gray scale voltage is larger than the common voltage;

If the target differential pressure is greater than the standard differential pressure, increasing the common voltage so that the target differential pressure is equal to the standard differential pressure;

and if the target pressure difference is smaller than the standard pressure difference, reducing the public voltage so that the target pressure difference is equal to the standard pressure difference.

comparing the target voltage difference with the standard voltage difference when the first gray scale voltage is smaller than the common voltage;

if the target differential pressure is greater than the standard differential pressure, reducing the common voltage so that the target differential pressure is equal to the standard differential pressure;

and if the target pressure difference is smaller than the standard pressure difference, increasing the public voltage so that the target pressure difference is equal to the standard pressure difference.

A second aspect of the embodiments of the present application provides a display panel, where the display panel includes a display area and a non-display area surrounding the display area, the display area includes a plurality of display sub-areas, each of the display sub-areas is correspondingly connected to a common voltage, and the non-display area is provided with a timing control module;

The timing control module is used for the method described in any embodiment of the application.

In one embodiment of the present application, the common voltage includes an array substrate common voltage, the non-display area is further provided with a plurality of flip-chip films corresponding to each of the display sub-areas one to one, and the timing control module is connected to each of the flip-chip films;

the display subarea comprises a plurality of scanning lines arranged along the row direction, a plurality of data lines arranged along the column direction and a plurality of pixel units, wherein the pixel units comprise thin film transistors, pixel electrodes and common electrodes; the control end of the thin film transistor is connected with the scanning line, the first end of the thin film transistor is connected with the data line, the pixel electrode is connected with the second end of the thin film transistor, and the common electrode is arranged opposite to the pixel electrode;

the flip chip film corresponding to the display subarea is connected with the public electrode in each pixel unit in the display subarea through a virtual sub-pin so as to adjust the public voltage of the array substrate applied to the public electrode.

In one embodiment of the present application, the non-display area is further provided with a plurality of source driving circuit boards and a plurality of flexible printed circuit boards, the timing control module is connected with the source driving circuit boards through the flexible printed circuit boards, and the source driving circuit boards are connected with a plurality of corresponding flip chip films;

The source electrode driving circuit board is connected with the data lines in the corresponding display subareas through the corresponding flip-chip films so as to input gray-scale voltages to the data lines.

According to the technical scheme provided by the embodiment of the application, according to the data to be displayed, a first gray scale voltage for driving each display subarea and a target gray scale voltage for driving a plurality of display subareas in a display panel are calculated; therefore, the absolute value of the difference between the target gray-scale voltage and the common voltage can be used as a standard voltage difference, and the common voltage corresponding to each display subarea can be adjusted, so that the absolute value of the difference between the first gray-scale voltage of each display subarea and the adjusted common voltage is equal to the standard voltage difference. By adjusting the public voltage corresponding to each display subarea, the display brightness of each display subarea is the same, so that the problem of uneven display brightness of the display panel can be solved.

Other features and advantages of the present application will be apparent from the following detailed description, or may be learned in part by the practice of the application.

It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the application.

Drawings

The above and other objects, features and advantages of the present application will become more apparent by describing in detail exemplary embodiments thereof with reference to the attached drawings.

Fig. 1 is a schematic view of a display panel provided in the related art.

Fig. 2 is a schematic diagram of a display panel according to an embodiment of the present application.

Fig. 3 is a flowchart of a brightness adjustment method of a display panel according to an embodiment of the present application.

Fig. 4 is a flowchart of a step of calculating a first gray scale voltage for driving a display sub-area according to data to be displayed according to an embodiment of the present application.

Fig. 5 is a flowchart of a step of calculating a target gray scale voltage for driving a display panel according to data to be displayed according to an embodiment of the present application.

Fig. 6 is a flowchart of a step of calculating a first gray scale voltage for driving a display sub-area according to data to be displayed according to an embodiment of the present application.

Fig. 7 is a flowchart of a step of calculating a target gray scale voltage for driving a display panel according to data to be displayed according to an embodiment of the present application.

Fig. 8 is a flowchart of a step of adjusting a common voltage corresponding to a display sub-region so that a target differential pressure is equal to a standard differential pressure according to an embodiment of the present application.

Fig. 9 is a flowchart of another step of adjusting the common voltage corresponding to the display sub-area so that the target differential pressure is equal to the standard differential pressure according to the embodiment of the present application.

Fig. 10 is a flowchart of a step of adjusting a common voltage corresponding to each display sub-area according to an embodiment of the present application.

Fig. 11 is a flowchart of steps performed when there is no brightness difference between the adjusted target area and the display sub-area adjacent to the target area provided in the embodiment of the present application.

Fig. 12 is an equivalent circuit diagram of a display panel provided in an embodiment of the present application.

Reference numerals illustrate:

10-a display panel; 101-displaying sub-regions; 11-a scan driving circuit; 12-a data driving circuit; 13-scan lines; 14-data lines; 15-a thin film transistor; a 16-pixel unit; 17-liquid crystal capacitance; 18-storage capacitance; 30-virtual sub-pins; 221-a timing control module; 222-a flip chip film; 223-source drive circuit board; 224-flexible printed circuit board.

Detailed Description

In order to make the objects, technical solutions and advantages of the present application more apparent, the present application will be further described in detail with reference to the accompanying drawings and examples. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the present application.

It should be noted that although functional block division is performed in a device diagram and a logic sequence is shown in a flowchart, in some cases, the steps shown or described may be performed in a different order than the block division in the device, or in the flowchart. The terms first, second and the like in the description and in the claims and in the above-described figures, are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used herein is for the purpose of describing embodiments of the present application only and is not intended to be limiting of the present application.

Referring to fig. 1, fig. 1 is a schematic diagram of a display panel provided by the related art. The display panel 10 includes a display sub-region 101, a scan driving circuit 11, a data driving circuit 12 and a backlight module (not shown).

The display sub-region 101 includes a plurality of scan lines 13 arranged at intervals, a plurality of data lines 14 arranged at intervals and intersecting the scan lines 13 in an insulating manner, and a plurality of thin film transistors 15 located at intersections of the scan lines 13 and the data lines 14. The minimum area defined by the scan lines 13 and the data lines 14 is the pixel units 16, and the pixel units of each row are periodically arranged according to the sequence of red, green and blue (RGB). A pixel (not shown) is formed by a red pixel unit, a green pixel unit and a blue pixel unit in succession. Each pixel cell 16 includes a thin film transistor 15, a liquid crystal capacitor (liquid crystal capacitor, clc) 17, and a storage capacitor (storage capacitor, cst) 18. The gate of the thin film transistor 15 is connected to the scan line 13, the source of the thin film transistor 15 is connected to the data line 14, one end of the storage capacitor 18 and one end of the liquid crystal capacitor 17 are both connected to the drain of the thin film transistor 15, the other end of the storage capacitor 18 is connected to the Array common voltage (Array VCOM) (not labeled), and the other end of the liquid crystal capacitor 17 is connected to the color film substrate common voltage (CF VCOM) (not labeled).

The scan driving circuit 11 generates a scan signal for driving the scan lines 13. The data driving circuit 12 is used for receiving image signals, converting the image signals into gray scale voltages through digital-to-analog conversion, and applying the gray scale voltages to the data lines 14. The backlight module is used for providing a light source for the display panel 10.

Based on this, the embodiment of the application proposes a brightness adjustment method of a display panel, which aims to adjust the common voltage of each display subarea by setting a standard pressure difference so as to make the display brightness of each display subarea identical, thereby solving the problem of uneven display brightness of the display panel.

Referring to fig. 2, fig. 2 is a schematic diagram of a display panel according to an embodiment of the present application. As shown in fig. 2, the display panel includes a plurality of display sub-regions 101 as shown in fig. 1 and a plurality of flip chip films 222. Each display sub-area 101 is correspondingly connected to one flip-chip film 222. For each display sub-region 101, the smallest area defined by the scan line 13 and the data line 14 is the pixel cell 16. Each pixel unit 16 includes a thin film transistor 15 (i.e., formed by the crossing portion of the scan line and the data line), a liquid crystal capacitor 17, and a storage capacitor 18. The gate of the thin film transistor 15 is connected to the scan line 13, the source of the thin film transistor 15 is connected to the data line 14, one end of the storage capacitor 18 and one end of the liquid crystal capacitor 17 are both connected to the drain of the thin film transistor 15, the other end of the liquid crystal capacitor 17 is connected to the color film substrate common voltage (CF VCOM) (not labeled), and the other end of the storage capacitor 18 is connected to the Array common voltage (Array VCOM) (not labeled).

The liquid crystal capacitor 17 is an equivalent capacitor formed by liquid crystal molecules, and the deflection angle of the liquid crystal molecules can be controlled by changing the electric field applied to the two ends of the liquid crystal capacitor 17 (namely, the voltage difference between the gray-scale voltage provided by the data driving unit and the common voltage CF Vcom of the color film substrate), so that the transmittance of light can be changed to display different brightness (gray scale). The storage capacitor 18 is generally much larger than the liquid crystal capacitor 17 for maintaining the electric quantity of the liquid crystal capacitor 17. Since the liquid crystal capacitor 17 is relatively small, and the characteristics of the thin film transistor have a problem of leakage, the storage capacitor 18 is required to charge the liquid crystal capacitor 17 in time. Embodiments of the present application contemplate that for large-sized display panels, they contain multiple display sub-regions. Each display sub-region is driven to display by a Chip On Film (COF). However, due to insufficient device process capability and Chip On Film (COF) driving capability, and because the positions of the pixel units in the display sub-regions are related to the charging sequence, the charging difference of the pixel units in different display sub-regions is greater as the display panel size is larger, so that brightness differences exist between the display sub-regions. Based on this, the embodiment of the application sets a standard brightness, and adjusts the public voltage in each display subarea, so that the brightness of each display subarea is close to the standard brightness, and the brightness difference of each display subarea can be reduced or even eliminated, so that the problem of uneven display brightness of the display panel can be solved.

Referring to fig. 3, fig. 3 is a flowchart of a brightness adjustment method of a display panel according to an embodiment of the present application, including but not limited to steps S310 to S330.

Step S310, according to the data to be displayed, a first gray scale voltage for driving each display subarea and a target gray scale voltage for driving a plurality of display subareas in the display panel are calculated.

In this embodiment, the timing control module processes the data to be displayed to obtain an image signal, and then transmits the image signal to a Chip On Film (COF). Since the Chip On Film (COF) carries the data driving chip, the Chip On Film (COF) can be changed into a gray voltage by passing an image signal through a digital-to-analog converter. The gray scale voltage is applied to the thin film transistor via the data line and the source and drain electrodes of the thin film transistor. That is, a corresponding gray scale voltage is applied to the thin film transistor corresponding to each pixel unit. Therefore, for a display subarea, according to the gray-scale voltage applied to the thin film transistor corresponding to each pixel unit, the whole gray-scale voltage of the display subarea, namely the first gray-scale voltage for driving the display subarea, can be calculated. And then according to the overall gray scale voltage of each display subarea, calculating to obtain target gray scale voltages for driving a plurality of display subareas in the display panel.

Referring to fig. 4, fig. 4 is a flowchart of steps for calculating a first gray scale voltage for driving a display sub-area according to data to be displayed, including but not limited to steps S410 to S420.

Step S410, according to the data to be displayed, the gray scale voltage applied to each pixel unit on each display subarea is obtained.

Step S420, carrying out average calculation on the gray scale voltage on each pixel unit to obtain a first gray scale voltage for driving the display subarea.

In this embodiment, the timing control module processes the data to be displayed to obtain an image signal and transmits the image signal to a Chip On Film (COF). Since the Chip On Film (COF) carries the data driving chip, the COF can obtain the gray scale voltage applied to each pixel unit on the display subarea by changing the image signal into the gray scale voltage through the digital-to-analog converter. The first gray scale voltage for driving the display subarea can be obtained by averaging the gray scale voltages on each pixel unit on the display subarea.

Illustratively, the display panel includes 4 display sub-regions, display sub-region a, display sub-region B, display sub-region C, and display sub-region D, respectively. For display sub-region a, it contains M pixel cells. The gray scale voltages applied to each pixel unit on the display subarea A can be obtained through a Chip On Film (COF), and M gray scale voltages can be correspondingly obtained. And then carrying out average calculation on the M gray scale voltages to obtain a first gray scale voltage V1 for driving the display subarea A. Likewise, for display sub-region B, it also contains M pixel cells. The gray scale voltages applied to each pixel unit on the display subarea B can be obtained through a Chip On Film (COF), and M gray scale voltages can be correspondingly obtained. And then carrying out average calculation on the M gray scale voltages to obtain a first gray scale voltage V2 for driving the display subarea B. For display sub-region C, it also contains M pixel cells. The gray scale voltages applied to each pixel unit on the display subarea A can be obtained through a Chip On Film (COF), and M gray scale voltages can be correspondingly obtained. And then carrying out average calculation on the M gray scale voltages to obtain a first gray scale voltage V3 for driving the display subarea C. For display sub-region D, it also contains M pixel cells. The gray scale voltages applied to each pixel unit on the display subarea A can be obtained through a Chip On Film (COF), and M gray scale voltages can be correspondingly obtained. And then carrying out average calculation on the M gray scale voltages to obtain a first gray scale voltage V4 for driving the display subarea D.

Referring to fig. 5, fig. 5 is a flowchart of steps for calculating a target gray scale voltage for driving a display panel according to data to be displayed, including but not limited to steps S510 to S520.

Step S510, obtaining a first gray-scale voltage corresponding to each display sub-region in the plurality of display sub-regions.

Step S520, performing an average calculation on the first gray scale voltages corresponding to each display subarea to obtain a target gray scale voltage for driving a plurality of display subareas in the display panel.

In this embodiment of the present application, after obtaining first gray scale voltages corresponding to a plurality of display sub-regions, average calculation may be performed on the first gray scale voltages corresponding to the plurality of display sub-regions, so as to obtain target gray scale voltages for driving the plurality of display sub-regions in the display panel.

Illustratively, the display panel includes 4 display sub-regions, display sub-region a, display sub-region B, display sub-region C, and display sub-region D, respectively. The steps shown in fig. 4 are obtained, wherein the first gray-scale voltage for driving the display subarea a is V1, the first gray-scale voltage for driving the display subarea B is V2, the first gray-scale voltage for driving the display subarea C is V3, and the first gray-scale voltage for driving the display subarea D is V4. Thus, the target gradation voltages v= (v1+v2+v3+v4)/4 for driving the display sub-areas a, B, C, and D in the display panel can be calculated.

In one embodiment of the present application, referring to fig. 6, fig. 6 is a flowchart of steps for calculating a first gray scale voltage for driving a display sub-area according to data to be displayed provided in the embodiment of the present application, including but not limited to steps S610 to S630.

In step S610, according to the data to be displayed, the display gray scale of each pixel unit in the display sub-area is obtained.

Step S620, carrying out average calculation on the display gray scale of each pixel unit to obtain the whole display gray scale of the display subarea.

Step S630, according to the whole display gray scale of the display subarea, a first gray scale voltage for driving the display subarea is obtained.

In this embodiment of the present application, the timing control module may obtain the display gray level of each pixel unit in each display sub-area through analysis and processing of the data to be displayed. And then, carrying out average calculation on the display gray scale of each pixel unit in the display subarea, so as to obtain the whole display gray scale (namely, average display gray scale) of each display subarea. And according to the whole display gray scale of the display subarea and the corresponding relation between the display gray scale and the gray scale voltage, obtaining a first gray scale voltage corresponding to the whole display gray scale for driving the display subarea.

Illustratively, the display panel includes 4 display sub-regions, display sub-region a, display sub-region B, display sub-region C, and display sub-region D, respectively. For display sub-region a, it contains M pixel cells. The time sequence control module can obtain the display gray scale applied to each pixel unit on the display subarea A by processing the data to be displayed, and M display gray scales can be correspondingly obtained. And then carrying out average calculation on the M display gray scales to obtain the whole display gray scale of the display subarea A as N1. And then, the corresponding relation between the display gray scale and the gray scale voltage can be used for obtaining the first gray scale voltage V1 corresponding to the display gray scale N1 of the whole display sub-area A. Likewise, for display sub-region B, it also contains M pixel cells. The time sequence control module can obtain the display gray scale applied to each pixel unit on the display subarea B by processing the data to be displayed, and M display gray scales can be correspondingly obtained. And then carrying out average calculation on the M display gray scales to obtain the whole display gray scale of the display subarea B as N2. And then, the corresponding relation between the display gray scale and the gray scale voltage can be used for obtaining the first gray scale voltage V2 corresponding to the display gray scale N2 of the whole display sub-area B. For display sub-region C, it also contains M pixel cells. The time sequence control module can obtain the display gray scale applied to each thin film transistor on the display subarea C by processing the data to be displayed, and M display gray scales can be correspondingly obtained. And then carrying out average calculation on the M display gray scales to obtain the whole display gray scale of the display subarea C as N3. And then, the corresponding relation between the display gray scale and the gray scale voltage can be used for obtaining the first gray scale voltage V1 corresponding to the display gray scale N3 of the whole display driving display subarea C. For display sub-region D, it also contains M pixel cells. The time sequence control module can obtain the display gray scale applied to each thin film transistor on the display subarea D by processing the data to be displayed, and M display gray scales can be correspondingly obtained. And then carrying out average calculation on the M display gray scales to obtain the whole display gray scale of the display subarea D, wherein the whole display gray scale is N4. And then, the corresponding relation between the display gray scale and the gray scale voltage can be used for obtaining the first gray scale voltage V4 corresponding to the display gray scale N4 of the whole display driving display subarea D.

Referring to fig. 7, fig. 7 is a flowchart of steps for calculating a target gray scale voltage for driving a display panel according to data to be displayed, including but not limited to steps S710 to S730.

Step S710, obtaining the overall display gray scale of each display subarea in the plurality of display subareas.

Step S720, carrying out average calculation on the whole display gray scale of each display subarea to obtain target display gray scales of a plurality of display subareas in the display panel.

In step S730, according to the target display gray levels of the display sub-areas in the display panel, the target gray level voltages for driving the display sub-areas in the display panel are obtained.

In this embodiment of the present application, after obtaining the overall display gray levels corresponding to each display sub-region in the plurality of display sub-regions, the overall display gray levels corresponding to each display sub-region in the plurality of display sub-regions may be averaged, so as to obtain the target display gray levels (i.e., average display gray levels) of the plurality of display sub-regions in the display panel. And determining target gray scale voltages for driving a plurality of display subareas in the display panel according to the target display gray scale and the corresponding relation between the display gray scale and the gray scale voltages.

Illustratively, the display panel includes 4 display sub-regions, display sub-region a, display sub-region B, display sub-region C, and display sub-region D, respectively. The overall display gray level of the display sub-area a is N1, the overall display gray level of the display sub-area B is N2, the overall display gray level of the display sub-area C is N3, and the overall display gray level of the display sub-area D is N4, which are obtained according to the steps shown in fig. 7. And thus, the average calculation is carried out on the whole display gray scale of each display subarea, and the target display gray scale N= (N1+N2+N3+N4)/4 of a plurality of display subareas in the display panel can be calculated. Therefore, according to the corresponding relation between the display gray scale and the gray scale voltage, the gray scale voltage corresponding to the target display gray scale N= (N1+N2+N3+N4)/4 can be obtained as V. Namely, the target gradation voltages for driving the display sub-areas a, B, C, and D in the display panel are V.

Taking an 8-bit display panel as an example, the total display gray scale of the display subarea can be 0-255 total 256 gray scale values.

In step S320, the absolute value of the difference between the target gray-scale voltage and the common voltage is used as the standard voltage difference.

In the embodiment of the present application, after obtaining the target gray scale voltages for driving the plurality of display sub-regions in the display panel, the absolute value of the difference between the target gray scale voltages and the common voltage may be used as the standard voltage difference.

It should be noted that, when the target gray-scale voltage for driving the plurality of display sub-regions in the display panel is obtained as the target gray-scale voltage for driving all the display sub-regions of the display panel, the target gray-scale voltage corresponds to the gray-scale voltage for driving the entire display panel.

Illustratively, the display panel includes 4 display sub-regions, display sub-region a, display sub-region B, display sub-region C, and display sub-region D, respectively. The first gray scale voltage for driving the display subarea A is V1, the first gray scale voltage for driving the display subarea B is V2, the first gray scale voltage for driving the display subarea C is V3, and the first gray scale voltage for driving the display subarea D is V4. Thus, the target gray-scale voltage v= (v1+v2+v3+v4)/4 for driving the display panel can be calculated. Then the standard differential pressure vb= |v-vcom|.

Step S330, the common voltage corresponding to each display subarea is adjusted so that the absolute value of the difference between the first gray-scale voltage of each display subarea and the adjusted common voltage is equal to the standard voltage difference.

In this embodiment of the present application, after determining the standard voltage difference, the absolute value of the difference between the first gray-scale voltage and the common voltage of each display sub-area may be further obtained, and the common voltage Vcom may be adjusted by increasing or decreasing, so that the absolute value of the difference between the first gray-scale voltage and the adjusted common voltage of each display sub-area is equal to the standard voltage difference.

In an embodiment of the present application, referring to fig. 8, fig. 8 is a flowchart of a step of adjusting a common voltage corresponding to each display sub-area, so that an absolute value of a difference between a first gray-scale voltage of each display sub-area and the adjusted common voltage is equal to a standard voltage difference, including but not limited to steps S810 to S840.

In step S810, the absolute value of the difference between the first gray-scale voltage and the common voltage is used as the target voltage difference.

In step S820, when the first gray voltage is greater than the common voltage, the target voltage difference is compared with the standard voltage difference.

In step S830, if the target differential pressure is greater than the standard differential pressure, the common voltage is increased so that the target differential pressure is equal to the standard differential pressure.

In step S840, if the target differential pressure is smaller than the standard differential pressure, the common voltage is reduced so that the target differential pressure is equal to the standard differential pressure.

In the embodiment of the application, the absolute value of the difference between the first gray-scale voltage and the common voltage is used as the target voltage difference. When the first gray scale voltage is greater than the common voltage, if the target differential pressure is greater than the standard differential pressure, then the target differential pressure needs to be reduced in order to make the target differential pressure equal to the standard differential pressure. Since the first gray-scale voltage is larger than the common voltage, the absolute value of the difference between the first gray-scale voltage and the common voltage (i.e., the target voltage difference) can be reduced by increasing the common voltage. If the target differential pressure is smaller than the standard differential pressure, the target differential pressure needs to be increased to make the target differential pressure equal to the standard differential pressure. Since the first gray-scale voltage is larger than the common voltage, the absolute value of the difference between the first gray-scale voltage and the common voltage (i.e., the target voltage difference) can be increased by decreasing the common voltage.

For example, for the display sub-region a, the target voltage difference is |v1-vcom|, since the first gray-scale voltage is greater than the common voltage, i.e., V1 > Vcom, when the target voltage difference is greater than the standard voltage difference, the target voltage difference needs to be reduced to make the target voltage difference equal to the standard voltage difference, and at this time, the common voltage Vcom needs to be increased to make |v1-vcom| be reduced. When the target differential pressure is smaller than the standard differential pressure, the target differential pressure needs to be increased to make the target differential pressure equal to the standard differential pressure, and at this time, the common voltage Vcom needs to be reduced to make |v1-vcom| increase.

It should be noted that, the standard voltage difference is set based on the original common voltage Vcom before adjustment, and once the standard voltage difference is set, it is not affected by the common voltage Vcom during adjustment.

In an embodiment of the present application, referring to fig. 9, fig. 9 is a flowchart of another step provided in the embodiment of the present application for adjusting the common voltage corresponding to each display sub-area so that the absolute value of the difference between the first gray-scale voltage of each display sub-area and the adjusted common voltage is equal to the standard voltage difference, including but not limited to steps S910 to S940.

In step S910, the absolute value of the difference between the first gray-scale voltage and the common voltage is taken as the target voltage difference.

In step S920, when the first gray voltage is smaller than the common voltage, the target voltage difference is compared with the standard voltage difference.

In step S930, if the target differential pressure is greater than the standard differential pressure, the common voltage is reduced so that the target differential pressure is equal to the standard differential pressure.

In step S940, if the target differential pressure is smaller than the standard differential pressure, the common voltage is increased so that the target differential pressure is equal to the standard differential pressure.

In the embodiment of the application, the absolute value of the difference between the first gray-scale voltage and the common voltage is used as the target voltage difference. When the first gray scale voltage is smaller than the common voltage, if the target differential pressure is larger than the standard differential pressure, the target differential pressure needs to be reduced in order to make the target differential pressure equal to the standard differential pressure. Since the first gray scale voltage is larger than the common voltage, the absolute value of the difference between the first gray scale voltage and the common voltage (i.e., the target voltage difference) can be reduced by reducing the common voltage. If the target differential pressure is smaller than the standard differential pressure, the target differential pressure needs to be increased to make the target differential pressure equal to the standard differential pressure. Since the first gray scale voltage is smaller than the common voltage, the absolute value of the difference between the first gray scale voltage and the common voltage (i.e., the target voltage difference) can be increased by increasing the common voltage.

For example, for display sub-region A, the target voltage difference is |V1-Vcom|, since the first gray scale voltage is less than the common voltage, i.e., V1 < Vcom, when the target voltage difference is greater than the standard voltage difference, the target voltage difference needs to be reduced to make the target voltage difference equal to the standard voltage difference, and at this time, the common voltage Vcom needs to be reduced to make |V1-Vcom| decrease. When the target differential pressure is smaller than the standard differential pressure, the target differential pressure needs to be increased to enable the target differential pressure to be equal to the standard differential pressure, and at the moment, the common voltage Vcom needs to be increased to enable the |V1-Vcom| to be increased.

Illustratively, the display panel includes 4 display sub-regions, display sub-region a, display sub-region B, display sub-region C, and display sub-region D, respectively. The first gray scale voltage for driving the display subarea A is V1, the first gray scale voltage for driving the display subarea B is V2, the first gray scale voltage for driving the display subarea C is V3, and the first gray scale voltage for driving the display subarea D is V4. Thus, the target gray-scale voltage v= (v1+v2+v3+v4)/4 for driving the display panel can be calculated. Then the standard differential pressure vb= |v-vcom|. For display sub-region A, the target voltage difference is |V1-Vcom|, since V1 > Vcom, and since the target voltage difference is |V1-Vcom| > Vb, the target voltage difference can be made equal to the standard voltage difference by increasing the common voltage Vcom. That is, for the display sub-area a, the corresponding common voltage Vcom is subjected to an increasing process so that the target voltage difference |v1-vcom| is equal to the standard voltage difference Vb. For display sub-region B, the target voltage difference is |V2-Vcom|, also because V2 > Vcom, and because the target voltage difference is |V2-Vcom| < Vb, at this time, by decreasing the common voltage Vcom, the target voltage difference can be made equal to the standard voltage difference. That is, for the display sub-region B, the common voltage Vcom to which it corresponds is subjected to a reduction process so that the target voltage difference |v2-vcom| is equal to the standard voltage difference Vb. For display sub-region C, the target voltage difference is |V3-Vcom|, since V3 > Vcom, and since the target voltage difference is |V3-Vcom| < Vb, the target voltage difference can be made equal to the standard voltage difference by decreasing the common voltage Vcom. That is, for the display sub-region C, the common voltage Vcom to which it corresponds is subjected to a reduction process so that the target voltage difference |v3-vcom| is equal to the standard voltage difference Vb. For display sub-region D, the target voltage difference is |V4-Vcom|, since V4 < Vcom, and since the target voltage difference is |V4-Vcom| > Vb, the target voltage difference can be made equal to the standard voltage difference by increasing the common voltage Vcom. That is, for the display sub-region D, the corresponding common voltage Vcom is subjected to an increasing process so that the target voltage difference |v4-vcom| is equal to the standard voltage difference Vb. Therefore, by increasing or decreasing the common voltage corresponding to each display subarea, the target pressure difference corresponding to each display subarea can be equal to the standard pressure difference, so that the brightness difference of each display subarea can be eliminated, and the problem of uneven display brightness of the display panel can be solved.

Note that, in the embodiment of the present application, the common voltage Vcom includes an array substrate common voltage (a Vcom). By setting the standard pressure difference and adjusting the common voltage (A Vcom) of the array substrate in each display subarea through the standard pressure difference, the pressure difference at two ends of the storage capacitor in each pixel unit can be the same, so that each pixel unit positioned at different positions in different display subareas can be uniformly charged, the display brightness of each display subarea can be uniform, and the problem of uneven display brightness of the display panel can be solved.

In one embodiment of the present application, referring to fig. 10, fig. 10 is a flowchart of a step of adjusting a common voltage corresponding to each display sub-area provided in the embodiment of the present application, including but not limited to steps S1010 to S1040.

Step S1010, according to the data to be displayed, calculating to obtain a gray scale voltage for driving a target area in the display panel, wherein the target area comprises a plurality of display subareas which are continuously adjacent.

In the embodiment of the present application, since the gray scale voltage for driving each display sub-area can be calculated according to the data to be displayed, the gray scale voltage for driving the target area in the display panel can be calculated as the target gray scale voltage. Wherein the target area comprises a plurality of display sub-areas that are consecutively adjacent.

Illustratively, the display panel includes 4 display sub-regions, display sub-region a, display sub-region B, display sub-region C, and display sub-region D, respectively. The display subarea A and the display subarea B are display subareas which are continuously adjacent, namely, the target area. According to the data to be displayed, the first gray-scale voltage driving the display subarea A is V1, the first gray-scale voltage driving the display subarea B is V2, and therefore the gray-scale voltage (V1 +V2)/2 used for driving the target area (comprising the display subarea A and the display subarea B) can be calculated and obtained as the target gray-scale voltage. At this time, the standard tolerance is the absolute value of the difference between the target gray-scale voltage and the common voltage.

Step S1020, adjusting the common voltages corresponding to the display sub-areas in the target area, so that the absolute value of the difference between the first gray-scale voltage of each display sub-area in the target area and the adjusted common voltage is equal to the standard voltage difference.

In this embodiment of the present application, after a gray-scale voltage of a driving target area is taken as a target gray-scale voltage and a standard differential pressure is determined based on an absolute value of a difference between the target gray-scale voltage and a common voltage, the common voltage corresponding to each display sub-area in the target area may be adjusted, so that the absolute value of the difference between the first gray-scale voltage and the adjusted common voltage of each display sub-area in the target area is equal to the standard differential pressure.

Illustratively, the display panel includes 4 display sub-regions, display sub-region a, display sub-region B, display sub-region C, and display sub-region D, respectively. The display subarea A and the display subarea B are display subareas which are continuously adjacent, namely, the target area. And taking the gray scale voltage of the driving target area as a target gray scale voltage. And the absolute value of the difference between the target gray-scale voltage and the common voltage is used as a standard voltage difference Vb, and then the common voltages of the display subarea A and the display subarea B are respectively adjusted. Specifically, the first gray-scale voltage of the display sub-area a is V1, the common voltage of the display sub-area a is Vcom, and the common voltage Vcom of the display sub-area a is adjusted so that |v1-vcom| is equal to the standard voltage difference Vb. Similarly, the first gray-scale voltage of the display sub-area B is V2, the common voltage of the display sub-area B is Vcom, and the common voltage Vcom of the display sub-area B is adjusted so that |v2-vcom| is equal to the standard voltage difference Vb.

Step S1030, determining whether there is a brightness difference between the adjusted target area and the display sub-area adjacent to the target area.

In the embodiment of the present application, after the common voltage of each display sub-area in the target area is adjusted, the absolute value of the difference between the first gray-scale voltage of each display sub-area in the target area and the adjusted common voltage is equal to the standard voltage difference, so that the display brightness of each display sub-area in the target area is the same. I.e. each consecutive adjacent display sub-area in the target area is of the same display brightness. In this case, it is necessary to further determine whether or not there is a difference in luminance between the adjusted target region and the display sub-region adjacent to the target region, that is, whether or not the display luminance of the display sub-region adjacent to the target region is the same as the display luminance of the target region.

Illustratively, the display panel includes 4 display sub-regions, display sub-region a, display sub-region B, display sub-region C, and display sub-region D, respectively. The display subarea A and the display subarea B are display subareas which are continuously adjacent, namely, the target area. After the common voltages of the display subarea A and the display subarea B in the target area are respectively adjusted, the display brightness of the display subarea A is consistent with that of the display subarea B. If the display sub-area a, the display sub-area B, the display sub-area C, and the display sub-area D are sequentially arranged from left to right in order, it is necessary to further determine whether there is a brightness difference between the display sub-area C and the target area.

Step S1040, when there is a brightness difference between the adjusted target area and the display sub-area adjacent to the target area, the display sub-area adjacent to the target area is listed in the target area, and the step of calculating to obtain the gray scale voltage for driving the target area in the display panel as the target gray scale voltage according to the data to be displayed is returned.

In this embodiment of the present application, when there is a brightness difference between the adjusted target area and the display sub-area adjacent to the target area, the display sub-area adjacent to the target area needs to be listed in the target area, and step S1010 is returned, and then common voltage adjustment is performed in the same manner. If the adjusted target area and the display subarea adjacent to the target area have no brightness difference, the display subarea adjacent to the target area can be listed in the target area, and whether the brightness difference exists between the target area and the display subarea adjacent to the target area is further judged. If so, the process proceeds to step S1010. Therefore, the common voltage corresponding to each display subarea in the display panel can be correspondingly adjusted.

Illustratively, the display panel includes 4 display sub-regions, display sub-region a, display sub-region B, display sub-region C, and display sub-region D, respectively. The display subarea A and the display subarea B are display subareas which are continuously adjacent, namely, the target area. After the common voltages of the display subarea A and the display subarea B in the target area are respectively adjusted, the display brightness of the display subarea A is consistent with that of the display subarea B. If the display sub-area a, the display sub-area B, the display sub-area C, and the display sub-area D are sequentially arranged from left to right in order, it is necessary to further determine whether there is a brightness difference between the display sub-area C and the target area. If the brightness difference does not exist between the display subarea C and the target area, the public voltage of the display subarea C is determined to be unchanged. And the display subarea C is listed in the target area, and then whether the brightness difference exists between the display subarea D and the target area is judged. If the brightness difference does not exist between the display subarea D and the target area, the public voltage of the display subarea D is determined to be unchanged. And if the brightness difference exists between the display subarea C and the target area, the display subarea C is listed in the target area, and the gray scale voltage of the driving target area is recalculated to obtain a new standard pressure difference, so that the public voltage corresponding to each display subarea in the target area can be readjusted according to the new standard pressure difference. After adjustment, judging whether the brightness difference exists between the display subarea D and the target area, if the brightness difference exists between the display subarea D and the target area, continuously listing the display subarea D into the target area, and recalculating the gray scale voltage of the driving target area to obtain a new standard pressure difference, so that the public voltage corresponding to each display subarea in the target area can be readjusted according to the new standard pressure difference.

In the embodiment of the application, when the brightness difference between the adjacent display subareas is considered, a more obvious vertical streak condition exists. According to the embodiment of the application, the common voltage is firstly adjusted to adjust the brightness of the plurality of display subareas which are continuously adjacent in the display panel, so that the vertical stripes between the adjacent display subareas can be eliminated. And judging whether the brightness difference exists between the display subarea adjacent to the target area and the target area, so as to judge the next processing mode, and when the brightness difference does not exist between the target area and the display subarea adjacent to the target area, the display subarea adjacent to the target area does not need to be processed, thereby saving the processing flow and accelerating the adjustment speed.

In one embodiment of the present application, referring to fig. 11, fig. 11 is a flowchart of steps performed when there is no brightness difference between the adjusted target area and the display sub-area adjacent to the target area, including but not limited to steps S1110 to S1120, provided in the embodiment of the present application.

Step S1110, each display sub-area of the display panel except the target area and the display sub-area adjacent to the target area is used as an unadjusted area.

Step S1120, obtaining the first gray-scale voltage of each display sub-area in the unregulated area, and regulating the common voltage corresponding to each display sub-area in the unregulated area, so that the absolute value of the difference between the first gray-scale voltage of each display sub-area and the regulated common voltage is equal to the standard pressure difference.

In this embodiment of the present application, when there is no brightness difference between the adjusted target area and the display sub-area adjacent to the target area, each display sub-area except for the target area and the display sub-area adjacent to the target area may be directly used as an unadjusted area, and then the first gray-scale voltage of each display sub-area in the unadjusted area is obtained, so as to adjust the common voltage corresponding to each display sub-area in the unadjusted area, so that the absolute value of the difference between the first gray-scale voltage of each display sub-area and the adjusted common voltage is equal to the standard pressure difference.

Illustratively, the display panel includes 6 display sub-regions, display sub-region a, display sub-region B, display sub-region C, display sub-region D, display sub-region E, and display sub-region F, respectively. The display subarea C and the display subarea D are display subareas which are continuously adjacent, namely, target areas. After the common voltages of the display subarea C and the display subarea D in the target area are respectively adjusted, the display brightness of the display subarea C is consistent with that of the display subarea D. If the display sub-area a, the display sub-area B, the display sub-area C, the display sub-area D, the display sub-area E, and the display sub-area F are sequentially arranged from left to right in order, it is necessary to further determine whether the display sub-area B has a luminance difference from the target area and whether the display sub-area E has a luminance difference from the target area. If the brightness difference does not exist between the display subarea B and the display subarea E and the target area, the public voltage of the display subarea B and the display subarea E is determined to be unchanged. At this time, each display subarea except the target area and the display subarea adjacent to the target area, namely, the display subarea a and the display subarea F is taken as an unadjusted area, and then the first gray-scale voltage for driving the display subarea a and the first gray-scale voltage for driving the display subarea F are respectively obtained, so that the common voltage of the display subarea a can be adjusted, and the absolute value of the difference value between the first gray-scale voltage of the display subarea a and the adjusted common voltage is equal to the standard pressure difference. Likewise, the common voltage of the display sub-area F may be adjusted such that the absolute value of the difference between the first gray-scale voltage of the display sub-area F and the adjusted common voltage is equal to the standard voltage difference.

In the embodiment of the present application, when there is no brightness difference between the adjusted target area and the display sub-area adjacent to the target area, by directly using each display sub-area except for the target area and the display sub-area adjacent to the target area as an unadjusted area and adjusting the common voltage corresponding to each display sub-area in the unadjusted area, the absolute value of the difference between the first gray-scale voltage of each display sub-area in the unadjusted area and the adjusted common voltage is equal to the standard voltage difference. So that the common voltage of the display sub-areas adjacent to the target area may not be adjusted.

In the embodiment of the present application, when determining whether there is a brightness difference, the case that the brightness difference is smaller than the preset threshold may be regarded as no brightness difference, that is, the brightness is the same.

The embodiment of the application also provides a display panel, which comprises a display area and a non-display area surrounding the display area, wherein the display area comprises a plurality of display subareas, each display subarea is correspondingly connected with a public voltage, and the non-display area is provided with a time sequence control module. The timing control module is used for executing the brightness adjustment method provided by any embodiment of the application.

In this embodiment of the present application, since the timing control module executes the luminance adjustment method provided in any one embodiment of the present application, in a driving display process of the display panel, the common voltage corresponding to each display sub-area may be adjusted to be increased or decreased based on the standard voltage difference, so that the absolute value of the first gray-scale voltage difference of each display sub-area and the adjusted differential value of the common voltage is equal to the standard voltage difference, so that the display luminance of each display sub-area is the same, and the problem of uneven display luminance of the display panel may be solved.

In one embodiment of the present application, the common voltage includes an array substrate common voltage, and the non-display area is further provided with a plurality of flip chip films corresponding to each display sub-area one to one, and the timing control module is connected to each flip chip film. The display subarea comprises a plurality of scanning lines arranged along the row direction, a plurality of data lines arranged along the column direction and a plurality of pixel units, wherein the pixel units comprise thin film transistors, pixel electrodes and common electrodes; the control end of the thin film transistor is connected with the scanning line, the first end of the thin film transistor is connected with the data line, the pixel electrode is connected with the second end of the thin film transistor, and the common electrode is arranged opposite to the pixel electrode. Wherein:

The flip chip film corresponding to the display subarea is connected with the common electrode in each pixel unit in the display subarea through the virtual sub-pins so as to adjust the common voltage of the array substrate applied to the common electrode.

Specifically, referring to fig. 12, fig. 12 is an equivalent circuit diagram of a display panel provided in an embodiment of the present application. As shown in fig. 12, the display panel includes a display area 21 and a non-display area 22 surrounding the display area, the display area 21 includes a plurality of display sub-areas 101, the non-display area 22 is provided with a timing control module 221 and a plurality of flip chip films 222 in one-to-one correspondence with the respective display sub-areas 101, and the timing control module 221 is connected with the plurality of flip chip films 222.

The display sub-area 101 includes a plurality of scanning lines 13 arranged in a row direction, a plurality of data lines 14 arranged in a column direction, and a plurality of pixel units 16. The pixel unit 16 includes a thin film transistor 15 and a storage capacitor 18, a gate electrode of the thin film transistor 15 is connected to the scan line 13, a source electrode of the thin film transistor 15 is connected to the data line 14, a drain electrode of the thin film transistor 15 is connected to one end of the storage capacitor 18, and a flip-chip thin film 222 corresponding to the display sub-region is connected to the other end of the storage capacitor 18 in each pixel unit 16 in the display sub-region 101 through a virtual sub-pin 30 to adjust a common voltage applied to the array substrate at the other end of the storage capacitor 18. That is, for each display subarea, each row is correspondingly provided with a horizontal common electrode wire, each display subarea is provided with a vertical common electrode wire, the plurality of horizontal common electrode wires are connected with one vertical common electrode wire of the display subarea, and the tail ends of the vertical common electrode wires are connected with a Chip On Film (COF) through virtual sub pins; in each display subarea, the corresponding transverse common electrode wiring of each row is connected with the common electrode of the pixel units of the row, so that the common voltage of the array substrate is applied to each pixel unit through the transverse common electrode wiring. After the time schedule controller calculates the common voltage to be compensated of each display subarea, the time schedule controller transmits the common voltage to be compensated to a Chip On Film (COF), then transmits the common voltage to be compensated to a rear virtual sub-pin through the COF, and the virtual sub-pin transmits the common voltage to be compensated to a transverse common electrode wiring in the display subarea through a vertical common electrode wiring, so that the common voltage to be compensated is transmitted to each pixel unit in the display subarea.

In this embodiment of the present application, one end of the storage capacitor 18 included in each pixel unit 16 in each display sub-region 101 is connected to the flip-chip film 222 corresponding to each display sub-region through the virtual sub-pin 30, so that the common voltage applied to the array substrate corresponding to the display sub-region 101 can be adjusted through the flip-chip film 222 corresponding to each display sub-region according to the method provided in any embodiment of the present application. Therefore, each pixel unit positioned at different positions in different display subareas can be uniformly charged, the display brightness of each display subarea can be uniform, and the problem of uneven display brightness of the display panel can be solved. That is, the timing controller obtains the display gray scale data of each pixel unit, so that the display gray scale of each display sub-area can be obtained, and after the timing controller further calculates the data difference of the display sub-area corresponding to each Chip On Film (COF), calculates the common voltage required to be compensated for the display sub-area corresponding to each Chip On Film (COF), and transmits the common voltage required to be compensated to the common electrode of the array substrate at the other end of the storage capacitor through the virtual sub-pin corresponding to each Chip On Film (COF).

It should be noted that, the Integrated Circuits (ICs) corresponding to the data driving chip and the scan driving chip are fixed on the flexible circuit board to obtain the flip chip film 222, that is, the flip chip film 222 carries the scan driving chip and the data driving chip for driving each display sub-area.

Referring to fig. 12, the non-display area 22 is further provided with a plurality of source driving circuit boards 223 and a plurality of flexible printed circuit boards 224, the timing control module 221 is connected to the source driving circuit boards 223 through the flexible printed circuit boards 224, and the source driving circuit boards 223 are connected to the corresponding plurality of flip chip films 222.

The source driving circuit board 223 is connected to the data lines 14 in the corresponding display sub-region 101 through the corresponding flip chip film 222 to input gray scale voltages to the data lines 14.

In this embodiment, the timing control module 221 generates a corresponding source driving signal according to the data to be displayed and then transmits the source driving signal to the source driving circuit board 223, so that the source driving circuit board 223 can input a corresponding gray-scale voltage to the data line 14 in the display sub-region 101 according to the source driving signal, that is, the gray-scale voltage is applied to one end of the storage capacitor 18, and then the common voltage of the array substrate applied to the other end of the storage capacitor 18 is adjusted through the corresponding flip-chip film 222, so that the differential pressure of two ends of the storage capacitor 18 is equal to a predetermined standard differential pressure. In this way, the differential pressure across the storage capacitor 18 in each pixel unit 16 in each display sub-area can be the same, so that each pixel unit located at different positions in different display sub-areas can be charged uniformly, the display brightness of each display sub-area can be uniform, and the problem of uneven display brightness of the display panel can be solved.

The embodiments described in the embodiments of the present application are for more clearly describing the technical solutions of the embodiments of the present application, and do not constitute a limitation on the technical solutions provided by the embodiments of the present application, and as those skilled in the art can know that, with the evolution of technology and the appearance of new application scenarios, the technical solutions provided by the embodiments of the present application are equally applicable to similar technical problems.

It will be appreciated by those skilled in the art that the technical solutions shown in the figures do not constitute limitations of the embodiments of the present application, and may include more or fewer steps than shown, or may combine certain steps, or different steps.

The above described apparatus embodiments are merely illustrative, wherein the units illustrated as separate components may or may not be physically separate, i.e. may be located in one place, or may be distributed over a plurality of network elements. Some or all of the modules may be selected according to actual needs to achieve the purpose of the solution of this embodiment.

Those of ordinary skill in the art will appreciate that all or some of the steps of the methods, systems, functional modules/units in the devices disclosed above may be implemented as software, firmware, hardware, and suitable combinations thereof.

The terms "first," "second," "third," "fourth," and the like in the description of the present application and in the above-described figures, if any, are used for distinguishing between similar objects and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used may be interchanged where appropriate such that embodiments of the present application described herein may be implemented in sequences other than those illustrated or otherwise described herein. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.

It should be understood that in this application, "at least one" means one or more, and "a plurality" means two or more. "and/or" for describing the association relationship of the association object, the representation may have three relationships, for example, "a and/or B" may represent: only a, only B and both a and B are present, wherein a, B may be singular or plural. The character "/" generally indicates that the context-dependent object is an "or" relationship. "at least one of" or the like means any combination of these items, including any combination of single item(s) or plural items(s). For example, at least one (one) of a, b or c may represent: a, b, c, "a and b", "a and c", "b and c", or "a and b and c", wherein a, b, c may be single or plural.

In the several embodiments provided in this application, it should be understood that the disclosed apparatus and method may be implemented in other ways. For example, the above-described apparatus embodiments are merely illustrative, and for example, the above-described division of units is merely a logical function division, and there may be another division manner in actual implementation, for example, a plurality of units or components may be combined or may be integrated into another system, or some features may be omitted, or not performed. Alternatively, the coupling or direct coupling or communication connection shown or discussed with each other may be an indirect coupling or communication connection via some interfaces, devices or units, which may be in electrical, mechanical or other form.

The units described above as separate components may or may not be physically separate, and components shown as units may or may not be physical units, may be located in one place, or may be distributed over a plurality of network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of this embodiment.

In addition, each functional unit in each embodiment of the present application may be integrated in one processing unit, or each unit may exist alone physically, or two or more units may be integrated in one unit. The integrated units may be implemented in hardware or in software functional units.

The integrated units, if implemented in the form of software functional units and sold or used as stand-alone products, may be stored in a computer readable storage medium. Based on such understanding, the technical solution of the present application may be embodied essentially or in part or all of the technical solution or in part in the form of a software product stored in a storage medium, including multiple instructions to cause a computer device (which may be a personal computer, a server, or a network device, etc.) to perform all or part of the steps of the methods of the various embodiments of the present application. And the aforementioned storage medium includes: a U-disk, a removable hard disk, a Read-Only Memory (ROM), a random access Memory (Random Access Memory, RAM), a magnetic disk, or an optical disk, or other various media capable of storing a program.

Preferred embodiments of the present application are described above with reference to the accompanying drawings, and thus do not limit the scope of the claims of the embodiments of the present application. Any modifications, equivalent substitutions and improvements made by those skilled in the art without departing from the scope and spirit of the embodiments of the present application shall fall within the scope of the claims of the embodiments of the present application.

Claims

1. A brightness adjustment method for a display panel, wherein the display panel includes a plurality of display sub-regions, each of the display sub-regions being correspondingly connected to a common voltage, the method comprising:

according to data to be displayed, calculating to obtain first gray scale voltages for driving the display subareas and target gray scale voltages for driving the display subareas in the display panel, wherein the first gray scale voltages are average gray scale voltages of the display subareas, and the target gray scale voltages are obtained by carrying out average calculation on the first gray scale voltages of the display subareas;

adjusting the public voltage corresponding to each display subarea so that the absolute value of the difference value between the first gray-scale voltage of each display subarea and the adjusted public voltage is equal to the standard voltage difference;

the common voltage corresponding to each display subarea is adjusted, and the method comprises the following steps:

2. The method of claim 1, wherein calculating a first gray scale voltage for driving each of the display sub-regions based on data to be displayed comprises:

3. The method of claim 2, wherein calculating a target gray scale voltage for driving a plurality of display sub-regions in the display panel based on data to be displayed comprises:

4. The method of claim 1, wherein when there is no brightness difference between the adjusted target region and a display sub-region adjacent to the target region, the method comprises:

5. The method of claim 1, wherein adjusting the common voltage for each of the display sub-regions such that an absolute value of a difference between the first gray-scale voltage and the adjusted common voltage for each of the display sub-regions is equal to the standard voltage difference comprises:

6. The method of claim 1, wherein adjusting the common voltage for each of the display sub-regions such that an absolute value of a difference between the first gray-scale voltage and the adjusted common voltage for each of the display sub-regions is equal to the standard voltage difference comprises:

7. The display panel is characterized by comprising a display area and a non-display area surrounding the display area, wherein the display area comprises a plurality of display subareas, each display subarea is correspondingly connected with a common voltage, and the non-display area is provided with a time sequence control module;

the timing control module is configured to perform the method of any of claims 1-6.

8. The display panel according to claim 7, wherein the common voltage includes an array substrate common voltage, the non-display area is further provided with a plurality of flip-chip films corresponding to each of the display sub-areas one by one, and the timing control module is connected to each of the flip-chip films;

9. The display panel according to claim 8, wherein the non-display region is further provided with a plurality of source driving circuit boards and a plurality of flexible printed circuit boards, the timing control module is connected to the source driving circuit boards through the flexible printed circuit boards, and the source driving circuit boards are connected to the corresponding plurality of flip chip films;