Display panel brightness adjustment method and display device

Abstract

The present application proposes a brightness adjustment method and display device for a display panel, which belongs to the technical field of display equipment. The method can obtain the first frequency of the current frame and the second frequency of the next frame respectively by detecting the length of the vertical blank gap area, so that the first target brightness adjustment data corresponding to each sub-area at the first frequency and the second target brightness adjustment data corresponding to each sub-area at the second frequency can be obtained from the brightness adjustment data set obtained in advance. Therefore, the driving voltage of each sub-area can be adjusted according to the first target brightness adjustment data and the second target brightness adjustment data corresponding to each sub-area, so that each sub-area can display the target brightness. The driving voltage applied to each sub-area is adjusted according to the target brightness adjustment data at different frequencies, so that the display brightness of each sub-area at different frequencies is the same, which can solve the problem of flickering of the screen brightness when the frequency is switched.

Description

Technical Field

[0001] The present application relates to the technical field of liquid crystal display devices, and in particular to a brightness adjustment method for a display panel and a display device. Background Art

[0002] With the development of display technology, existing liquid crystal displays (LCDs) use variable refresh rate (VRR) technology to support multiple refresh rates. The refresh rate refers to the number of times the display screen is refreshed per second. Variable refresh rate technology allows the LCD to have a variable refresh rate and allows the graphics card to control the refresh process. By adjusting the monitor's refresh rate, the graphics card and monitor refresh rates are aligned, minimizing screen tearing and other display issues.

[0003] In the related art, due to the liquid crystal characteristics of liquid crystal displays, in variable refresh rate mode, the lower the frame rate, the longer the length of the vertical blank gap (v-blank) area. The longer the length of the vertical blank gap area, the more leakage, resulting in a lower pixel electrode voltage, making the pixel display brightness lower, causing the screen brightness to flicker when the frequency switches. Summary of the Invention

[0004] The main purpose of the embodiments of the present application is to provide a display panel brightness adjustment method and display device. This method aims to achieve the same display brightness across sub-regions at different frequencies by adjusting the driving voltage applied to each sub-region of the display panel based on target brightness adjustment data at different frequencies, thereby resolving the issue of screen brightness flickering when switching frequencies.

[0005] To achieve the above objectives, a first aspect of an embodiment of the present application provides a method for adjusting the brightness of a display panel, wherein the display panel includes a display area and a non-display area surrounding the display area, wherein the display area includes a plurality of scan lines spaced apart along a row direction and a plurality of data lines spaced apart along a column direction and insulated from and intersecting the scan lines; the method includes:

[0006] By detecting the length of the vertical blank gap area, the first frequency of the current frame and the second frequency of the next frame are respectively obtained;

[0007] determining, according to the first frequency, first target brightness adjustment data corresponding to each sub-region in the display area from a pre-debugged brightness adjustment data set, and adjusting a driving voltage applied to each sub-region when displaying the current frame according to the first target brightness adjustment data corresponding to each sub-region, so that each sub-region displays a target brightness;

[0008] According to the second frequency, the second target brightness adjustment data corresponding to each of the sub-areas is determined from the brightness adjustment data set obtained in advance, so as to adjust the driving voltage applied to each of the sub-areas when displaying the next frame of the picture according to the second target brightness adjustment data corresponding to each of the sub-areas, so that each of the sub-areas displays the target brightness.

[0009] A second aspect of the embodiments of the present application provides a display device, comprising:

[0010] A display panel comprising a display area and a non-display area surrounding the display area, wherein the display area comprises a plurality of scan lines spaced apart along a row direction and a plurality of data lines spaced apart along a column direction and insulated from and intersecting the scan lines;

[0011] A timing control circuit board connected to the display panel;

[0012] The timing control circuit board is used to perform the following steps:

[0013] By detecting the length of the vertical blank gap area, the first frequency of the current frame and the second frequency of the next frame are respectively obtained;

[0014] determining, according to the first frequency, first target automatic chromaticity control data corresponding to each sub-region in the display area from a pre-debugged automatic chromaticity control data set, and adjusting a row driving voltage applied to each sub-region when displaying the current frame according to the first target automatic chromaticity control data corresponding to each sub-region, so that each sub-region displays a target brightness;

[0015] According to the second frequency, the second target automatic chromaticity control data corresponding to each of the sub-areas is determined from the automatic chromaticity control data set obtained in advance, so as to adjust the row driving voltage applied to each of the sub-areas when displaying the next frame of the picture according to the second target automatic chromaticity control data corresponding to each of the sub-areas, so that each of the sub-areas displays the target brightness.

[0016] A third aspect of the embodiments of the present application provides a display device, comprising:

[0017] A display panel, the display panel comprising a display area and a non-display area surrounding the display area, the display area comprising a plurality of scan lines spaced apart along a row direction and a plurality of data lines spaced apart along a column direction and insulated from and intersecting the scan lines; a plurality of source driver circuit boards disposed in the non-display area, the source driver circuit boards being connected to corresponding sub-areas in the display area via a chip-on-film (COF), and a gamma voltage regulation chip disposed on the source driver circuit boards;

[0018] A system-level chip connected to the source driver circuit board;

[0019] The system-on-chip is configured to perform the following steps:

[0020] By detecting the length of the vertical blank gap area, the first frequency of the current frame and the second frequency of the next frame are respectively obtained;

[0021] determining, according to the first frequency, first target gamma compensation voltage data corresponding to each column-oriented sub-region in the display area from a gamma compensation voltage data set obtained in advance, and sending the first target gamma compensation voltage data corresponding to each column-oriented sub-region to the gamma voltage adjustment chip on the corresponding source driver circuit board, so that each gamma voltage adjustment chip adjusts the column driving voltage of the corresponding column-oriented sub-region according to the corresponding first target gamma compensation voltage data when displaying the current frame image, so that each column-oriented sub-region displays a target brightness;

[0022] According to the second frequency, the second target gamma compensation voltage data corresponding to each column sub-area in the display area is determined from the gamma compensation voltage data set obtained in advance, so as to send the second target gamma compensation voltage data corresponding to each column sub-area to the corresponding gamma voltage adjustment chip on the source driver circuit board, so that when each gamma voltage adjustment chip displays the next frame of the picture, it adjusts the column drive voltage of the corresponding column sub-area according to the corresponding second target gamma compensation voltage data, so that each column sub-area displays the target brightness.

[0023] In the technical solution provided by the embodiments of the present application, by detecting the length of the vertical blank gap, the first frequency of the current frame and the second frequency of the next frame can be respectively obtained. Therefore, when displaying the current frame, the first target brightness adjustment data corresponding to each sub-region can be determined from a pre-debugged brightness adjustment data set based on the first frequency. Specifically, the first target brightness adjustment data corresponding to each sub-region at the first frequency can be obtained from the pre-debugged brightness adjustment data set. The driving voltage of each sub-region can then be adjusted based on the first target brightness adjustment data, so that each sub-region displays the target brightness. When displaying the next frame, the second target brightness adjustment data corresponding to each sub-region can be determined from the pre-debugged brightness adjustment data set based on the second frequency. Specifically, the second target brightness adjustment data corresponding to each sub-region at the second frequency can be obtained from the pre-debugged brightness adjustment data set. The driving voltage of each sub-region can then be adjusted based on the second target brightness adjustment data, so that each sub-region also displays the target brightness. By adjusting the driving voltage applied to each sub-region of the display panel based on the target brightness adjustment data at different frequencies, the display brightness of each sub-region at different frequencies can be made uniform, thereby resolving the problem of flickering brightness when switching between frequencies. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 is a flow chart of a method for adjusting the brightness of a display panel provided in an embodiment of the present application;

[0025] Figure 2 This is a flowchart of the steps for pre-debugging a brightness adjustment data set provided by an embodiment of the present application;

[0026] Figure 3 This is a flowchart of the steps for pre-debugging an automatic chromaticity control data set provided by an embodiment of the present application;

[0027] Figure 4 is a schematic diagram of dividing the display area provided in an embodiment of the present application;

[0028] Figure 5 This is a flowchart of the steps for pre-debugging a gamma compensation voltage data set provided by an embodiment of the present application;

[0029] Figure 6 Schematic diagram of dividing the display area into columns according to an embodiment of the present application;

[0030] Figure 7 This is a flowchart of the steps for pre-debugging a row drive compensation data set provided by an embodiment of the present application;

[0031] Figure 8 Schematic diagram of dividing a display area into rows according to an embodiment of the present application;

[0032] Figure 9 This is another step flow chart of pre-debugging the brightness adjustment data set provided by an embodiment of the present application;

[0033] Figure 10 This is another step flow chart of pre-debugging the automatic chromaticity control data set provided by an embodiment of the present application;

[0034] Figure 11 This is another flowchart of the steps of pre-debugging the gamma compensation voltage data set provided by an embodiment of the present application;

[0035] Figure 12 This is another step flow chart of pre-debugging a row drive compensation data set according to an embodiment of the present application;

[0036] Figure 13 This is a flowchart of the steps of determining first target brightness adjustment data from a brightness adjustment data set obtained by pre-debugging according to a first frequency, provided by an embodiment of the present application;

[0037] Figure 14 is a schematic structural diagram of a display device provided in an embodiment of the present application;

[0038] Figure 15 This is a flow chart of the steps performed by the timing control circuit board provided in an embodiment of the present application;

[0039] Figure 16 is another structural schematic diagram of the display device provided in an embodiment of the present application;

[0040] Figure 17 This is a flowchart of the steps executed by the system-level chip provided in the embodiment of the present application.

[0041] Description of reference numerals:

[0042] Display panel 1110; scan line 1; data line 2; timing control circuit board 1120; source driver circuit board 10; chip-on-film 20; gamma voltage regulator chip 11; system-on-chip 1320. DETAILED DESCRIPTION

[0043] In order to make the purpose, technical solutions and advantages of this application more clear, the following further describes this application in detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain this application and are not intended to limit this application.

[0044] It should be noted that although the device schematics illustrate functional module divisions and the flowcharts illustrate logical sequences, in certain circumstances, the steps illustrated or described may be performed in a sequence that differs from the module divisions in the device or the sequence in the flowcharts. The terms "first," "second," and the like in the specification, claims, and drawings are used to distinguish similar objects and are not necessarily used to describe a specific sequence or precedence.

[0045] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the art to which this application pertains. The terms used herein are for the purpose of describing the embodiments of this application only and are not intended to limit this application.

[0046] With the development of display technology, variable frequency (freesync) technology has emerged, such as variable refresh rate (VRR) technology, which can adjust the screen refresh rate according to the displayed content. This has led to the widespread problem of variable frequency flicker in display products. Because the frame rate is changed by adjusting the length of the vertical blank interval (v-blank) area in variable frequency mode, the lower the frame rate in variable frequency mode, the longer the vertical blank interval area. The longer the vertical blank interval area is, the greater the leakage, resulting in lower pixel electrode voltage and lower pixel display brightness. When the high and low frame rates are quickly switched, the pixel display brightness varies greatly, making the user's naked eye noticeable flicker.

[0047] Based on this, an embodiment of the present application proposes a brightness adjustment method for a display panel. By adjusting the driving voltage applied to each sub-area of ​​the display panel according to the target brightness adjustment data at different frequencies, the display brightness of each sub-area at different frequencies can be made the same, which can solve the problem of flickering screen brightness when the frequency is switched.

[0048] Reference Figure 1 , Figure 1 This is a flow chart of a method for adjusting the brightness of a display panel provided in an embodiment of the present application. The display panel includes a display area and a non-display area surrounding the display area. The display area includes a plurality of scan lines spaced apart along the row direction and a plurality of data lines spaced apart along the column direction and insulated from and intersecting the scan lines. The method includes but is not limited to steps S110 to S130.

[0049] In step S110 , the first frequency of the current frame and the second frequency of the next frame are respectively obtained by detecting the length of the vertical blank gap area.

[0050] In this embodiment of the present application, frequency switching is achieved by adjusting the length of the vertical blanking gap. The lower the frame rate, the longer the vertical blanking gap. Thus, by detecting the length of the vertical blanking gap, the first frequency of the current frame and the second frequency of the next frame can be obtained.

[0051] Specifically, when displaying the current frame, the length of the vertical blank gap area is detected to obtain a first frequency corresponding to the current frame. When displaying the next frame, the length of the vertical blank gap area is detected to obtain a second frequency corresponding to the next frame.

[0052] Step S120, according to the first frequency, determine the first target brightness adjustment data corresponding to each sub-area in the display area from the brightness adjustment data set obtained in advance, and adjust the driving voltage applied to each sub-area when displaying the current frame according to the first target brightness adjustment data corresponding to each sub-area, so that each sub-area displays the target brightness.

[0053] In this embodiment of the present application, the pre-debugged brightness adjustment data set includes brightness adjustment data for each sub-region of the display area at different frequencies. After obtaining a first frequency, first target brightness adjustment data corresponding to the first frequency can be determined from the pre-debugged brightness adjustment data set. The drive voltage applied to each sub-region of the display area when displaying the current frame can then be adjusted based on the first target brightness adjustment data so that each sub-region displays the target brightness.

[0054] For example, by detecting the length of the vertical blank gap area, the first frequency is determined to be 48 Hz. The brightness adjustment data set includes brightness adjustment data for each sub-area of ​​the display area at various frequencies from 48 Hz to 144 Hz. Therefore, the brightness adjustment data at 48 Hz can be directly obtained from the brightness adjustment data set. Therefore, when displaying the current frame, the driving voltage applied to each sub-area of ​​the display area can be adjusted based on the brightness adjustment data at 48 Hz, so that each sub-area displays the target brightness.

[0055] In one embodiment of the present application, referring to Figure 2 , Figure 2 This is a flowchart of the steps of pre-debugging a brightness adjustment data set provided by an embodiment of the present application, including but not limited to steps S210 to S230.

[0056] Step S210: dividing the display area into multiple sub-areas.

[0057] Step S220 , controlling each sub-region to display the target brightness at the same frequency without changing the driving voltage in the preset direction, so as to obtain brightness adjustment data corresponding to each sub-region.

[0058] Step S230 : collecting the brightness adjustment data of each sub-region at different frequencies to obtain a brightness adjustment data set.

[0059] In this embodiment, the display area is first divided into multiple sub-areas. Then, without changing the driving voltage in a predetermined direction, each sub-area is controlled to display the target brightness at the same frequency to obtain brightness adjustment data corresponding to each sub-area. The brightness adjustment data for each sub-area at different frequencies is then aggregated to obtain a brightness adjustment dataset.

[0060] Exemplarily, the display area is divided into three sub-areas. Without changing the driving voltage in the preset direction, each sub-area is controlled to display the target brightness at 48HZ, and the brightness adjustment data corresponding to each sub-area at 48HZ is obtained. One sub-area corresponds to one brightness adjustment data, and three sub-areas correspond to three brightness adjustment data respectively. Then, without changing the driving voltage in the preset direction, each sub-area is controlled to display the target brightness at 49HZ, and the brightness adjustment data corresponding to each sub-area at 49HZ is obtained. By analogy, the brightness adjustment data of each sub-area at 48HZ to 144HZ can be obtained, and the brightness adjustment data set can be obtained by combining the brightness adjustment data of each sub-area at 48HZ to 144HZ.

[0061] In one embodiment of the present application, the brightness adjustment dataset includes an automatic chroma control (ACC) dataset. Figure 3 , Figure 3 This is a flowchart of the steps for pre-debugging an automatic chromaticity control data set provided by an embodiment of the present application, including but not limited to steps S310 to S330.

[0062] Step S310 : dividing the display area of ​​the display panel into a plurality of sub-areas.

[0063] Step S320 , without changing the column driving voltage, controlling each sub-region to display the target brightness at the same frequency, so as to obtain automatic chromaticity control data corresponding to each sub-region.

[0064] Step S330 : Collecting the automatic chromaticity control data of each sub-region at different frequencies to obtain an automatic chromaticity control data set.

[0065] In this embodiment of the present application, the display area is first divided into multiple sub-areas. Then, without changing the column drive voltage (i.e., the drive voltage in the column direction), each sub-area is controlled to display the target brightness at the same frequency to obtain automatic color control data corresponding to each sub-area. The automatic color control data of each sub-area at different frequencies is then combined to obtain an automatic color control data set.

[0066] For example, referring to Figure 4 , Figure 4 : This is a schematic diagram of dividing the display area provided by an embodiment of the present application. The embodiment of the present application divides the display area into 9 sub-areas. Without changing the column drive voltage, each sub-area is controlled to display the target brightness at 48HZ, and the automatic chromaticity control data corresponding to each sub-area at 48HZ is obtained. One sub-area corresponds to one automatic chromaticity control data, and the 9 sub-areas correspond to 9 automatic chromaticity control data respectively. Then, without changing the column drive voltage, each sub-area is controlled to display the target brightness at 49HZ, and the automatic chromaticity control data corresponding to each sub-area at 49HZ is obtained. By analogy, the automatic chromaticity control data of each sub-area at 48HZ to 144HZ can be obtained, and the automatic chromaticity control data set can be obtained by combining the automatic chromaticity control data of each sub-area at 48HZ to 144HZ.

[0067] It should be noted that during the debugging process of the automatic chromaticity control data set, the same target brightness needs to be used for debugging at different frequencies. For example, Figure 4 The brightness of the sub-area 5 shown at 48HZ is the target brightness, so at 48HZ, let Figure 4 The brightness of the nine sub-areas in the 48Hz frequency band is adjusted to the target brightness, and the corresponding automatic color control data for the nine sub-areas is obtained. Similarly, at 120Hz, the brightness of the nine sub-areas is adjusted to the target brightness, and the corresponding automatic color control data for the nine sub-areas is obtained. In this way, by setting a target brightness, the automatic color control data corresponding to each sub-area at different frequencies can be obtained.

[0068] It should be noted that the target brightness can also be any other specified brightness value, such as the average display brightness of the entire display area at any frequency, such as the average display brightness of the entire display area at 48HZ can be selected as the target brightness.

[0069] In one embodiment of the present application, a plurality of source driver circuit boards 10 are provided in the non-display area. The source driver circuit boards 10 are connected to the corresponding sub-areas in the display area through a cover film 20. A gamma voltage adjustment chip 11 is provided on the source driver circuit board 10. The brightness adjustment data set includes a gamma compensation voltage data set. Figure 5 , Figure 5 This is a flowchart of the steps of pre-debugging a gamma compensation voltage data set provided by an embodiment of the present application, including but not limited to steps S510 to S530.

[0070] Step S510, dividing the sub-areas driven by the source driver circuit boards in the display area into columns to obtain a plurality of column sub-areas;

[0071] Step S520 , controlling each column-direction sub-region to display target brightness at the same frequency without changing the row driving voltage, so as to obtain gamma compensation voltage data corresponding to each column-direction sub-region;

[0072] Step S530 : Gamma compensation voltage data of each column sub-region at different frequencies are collected to obtain a gamma compensation voltage data set.

[0073] In an embodiment of the present application, the sub-areas driven by each source driver circuit board in the display area are divided column-wise to obtain a plurality of column-wise sub-areas. Without changing the row drive voltage (i.e., the drive voltage in the row direction), each column-wise sub-area is controlled to display a target brightness at the same frequency to obtain gamma compensation voltage data corresponding to each column-wise sub-area. The gamma compensation voltage data for each column-wise sub-area at different frequencies are then aggregated to obtain a gamma compensation voltage dataset.

[0074] For example, referring to Figure 6 , Figure 6 : This is a schematic diagram of the column-wise division of the display area provided in an embodiment of the present application. In an embodiment of the present application, three source driver circuit boards (X-PCBs) 10 are provided in the non-display area, and each sub-area driven by each source driver circuit board (X-PCB) 10 is divided into columns to obtain three column-wise sub-areas. Without changing the row drive voltage, each column-wise sub-area is controlled to display the target brightness at 48HZ, and the gamma compensation voltage data corresponding to each column-wise sub-area at 48HZ is obtained. One column-wise sub-area corresponds to one gamma compensation voltage data, and the three column-wise sub-areas correspond to three gamma compensation voltage data respectively. Then, without changing the row drive voltage, each column-wise sub-area is controlled to display the target brightness at 49HZ, and the gamma compensation voltage data corresponding to each column-wise sub-area at 49HZ is obtained. Similarly, gamma compensation voltage data of each column sub-region at 48 Hz to 144 Hz can be obtained. The gamma compensation voltage data set can be obtained by combining the gamma compensation voltage data of each column sub-region at 48 Hz to 144 Hz.

[0075] In one embodiment of the present application, after obtaining gamma compensation voltage data corresponding to each column sub-region, the method includes:

[0076] The gamma compensation voltage data are encoded so that each gamma compensation voltage data has a corresponding encoding value.

[0077] Exemplarily, the non-display area is provided with three source driver circuit boards (X-PCBs) 10, and each column-oriented sub-area driven by each source driver circuit board (X-PCB) 10 is divided to obtain three column-oriented sub-areas. Without changing the row drive voltage, each column-oriented sub-area is controlled to display the target brightness at 48 Hz, and the gamma compensation voltage data corresponding to each column-oriented sub-area at 48 Hz is obtained. One column-oriented sub-area corresponds to one gamma compensation voltage data, and the three column-oriented sub-areas correspond to three gamma compensation voltage data respectively. Each gamma compensation voltage data is further encoded so that each gamma compensation voltage data has a corresponding encoding value. Specifically, at 48 Hz, sub-area 1 corresponds to code 1, sub-area 2 corresponds to code 2, and sub-area 3 corresponds to code 3. In this way, it can be obtained that at 49 Hz, sub-area 1 corresponds to code 4, sub-area 2 corresponds to code 5, and sub-area 3 corresponds to code 6. Thus, the encoding values ​​corresponding to the gamma voltage data of each sub-area at 48 Hz to 144 Hz can be obtained.

[0078] In an embodiment of the present application, for a display panel without a timing control circuit board, a system-on-chip (SoC) can be developed to replace the timing control circuit board. In this case, a gamma voltage adjustment chip needs to be provided on each source driver circuit board. Each gamma voltage adjustment chip has a different device address. Therefore, when the SoC sends a code value corresponding to target gamma compensation voltage data to the gamma voltage adjustment chip on each source driver circuit board, it also needs to send the corresponding device address. That is, when displaying a current frame, the SoC needs to send the first target code value and device address corresponding to each column-oriented sub-region to the gamma voltage adjustment chip on the corresponding source driver circuit board, so that each gamma voltage adjustment chip recognizes the device address to receive the first target code value, and then recognizes the first target code value to obtain the corresponding first target gamma compensation voltage data. When displaying the current frame, the SoC adjusts the column drive voltage of the corresponding column-oriented sub-region according to the first target gamma compensation voltage data, so that each column-oriented sub-region displays the target brightness. Similarly, when displaying the next frame, the system-level chip needs to send the second target code value and device address bit corresponding to each column sub-region to the gamma voltage adjustment chip on the corresponding source driver circuit board, so that each gamma voltage adjustment chip recognizes the device address bit to receive the second target code value, and recognizes the second target code value to obtain the corresponding second target gamma compensation voltage data. When displaying the next frame, the column drive voltage of the corresponding column sub-region is adjusted according to the second target gamma compensation voltage data so that each column sub-region displays the target brightness. This ensures that the display brightness of the display is the same when the frequency is switched.

[0079] In one embodiment of the present application, the brightness adjustment data set includes a row drive compensation data set. Figure 7 , Figure 7 This is a flowchart of the steps for pre-debugging a row drive compensation data set provided by an embodiment of the present application, including but not limited to steps S710 to S730.

[0080] Step S710 , dividing the display area into multiple row-wise sub-areas by row-wise division.

[0081] Step S720 , without changing the data voltage, controlling each row sub-region to display the target brightness at the same frequency, so as to obtain row driving compensation data corresponding to each row sub-region.

[0082] Step S730 : Collect row drive compensation data of each row sub-region at different frequencies to obtain a row drive compensation data set.

[0083] In the embodiment of the present application, the display area is first divided into multiple row sub-areas in the row direction. Then, without changing the data voltage (i.e., the driving voltage in the column direction), each row sub-area is controlled to display the target brightness at the same frequency to obtain row drive compensation data corresponding to each row sub-area. The row drive compensation data of each sub-area at different frequencies are then combined to obtain a row drive compensation data set.

[0084] For example, referring to Figure 8 , Figure 8 It is a schematic diagram of the row-wise division of the display area provided by an embodiment of the present application. The embodiment of the present application divides the display area into three sub-areas by row-wise division. Without changing the data voltage, each row-wise sub-area is controlled to display the target brightness at 48HZ, and the row drive compensation data corresponding to each row-wise sub-area at 48HZ is obtained. One row-wise sub-area corresponds to one row drive compensation data, and the three row-wise sub-areas correspond to three row drive compensation data respectively. Then, without changing the data voltage, each row-wise sub-area is controlled to display the target brightness at 49HZ, and the row drive compensation data corresponding to each row-wise sub-area at 49HZ is obtained. By analogy, the row drive compensation data of each row-wise sub-area at 48HZ to 144HZ can be obtained, and the row drive compensation data set can be obtained by combining the row drive compensation data of each row-wise sub-area at 48HZ to 144HZ.

[0085] Reference Figure 9 , Figure 9 This is another step flow chart of pre-debugging the brightness adjustment data set provided by an embodiment of the present application, including but not limited to steps S910 to S930.

[0086] Step S910, dividing the display area into multiple sub-areas;

[0087] Step S920, without changing the driving voltage in the preset direction, sequentially controlling each sub-region to display the target brightness at a first preset frequency, a second preset frequency, a third preset frequency, a fourth preset frequency, a fifth preset frequency, and a sixth preset frequency that increase in sequence, so as to obtain first brightness adjustment data for each sub-region at the first preset frequency, second brightness adjustment data at the second preset frequency, third brightness adjustment data at the third preset frequency, fourth brightness adjustment data at the fourth preset frequency, fifth brightness adjustment data at the fifth preset frequency, and sixth brightness adjustment data at the sixth preset frequency, wherein the first preset frequency is greater than or equal to a lower frequency limit value of the display panel in the variable refresh rate mode, and the sixth preset frequency is greater than or equal to a higher frequency limit value of the display panel in the variable refresh rate mode;

[0088] Step S930 : Collect the first brightness adjustment data, the second brightness adjustment data, the third brightness adjustment data, the fourth brightness adjustment data, the fifth brightness adjustment data, and the sixth brightness adjustment data corresponding to each sub-region to obtain a brightness adjustment data set.

[0089] In the embodiment of the present application, considering that when the frequency difference is small, the display brightness difference is not large, that is, the flicker problem caused by switching between frequencies with small corresponding differences is not noticeable to the human eye. Therefore, there is no need to debug to obtain the brightness adjustment data at each frequency. In the embodiment of the present application, considering that in the variable refresh rate (VRR) mode, the frequency changes between 48HZ and 144HZ, therefore, 6 different and gradually increasing frequencies can be selected from 48HZ to 144HZ, and the brightness adjustment data at these 6 different frequencies can be obtained by debugging. The brightness adjustment data at these 6 different frequencies are then collected to obtain a brightness adjustment data set.

[0090] For example, the first preset frequency is 48 Hz, the second preset frequency is 52 Hz, the third preset frequency is 80 Hz, the fourth preset frequency is 100 Hz, the fifth preset frequency is 125 Hz, and the sixth preset frequency is 144 Hz. The display area is divided into multiple sub-areas. Without changing the driving voltage in the preset direction, each sub-area is controlled to display the target brightness at 48 Hz, and first brightness adjustment data corresponding to each sub-area at 48 Hz is obtained. Without changing the driving voltage in the preset direction, each sub-area is controlled to display the target brightness at 52 Hz, and second brightness adjustment data corresponding to each sub-area at 52 Hz is obtained. Without changing the driving voltage in the preset direction, each sub-area is controlled to display the target brightness at 80 Hz, and third brightness adjustment data corresponding to each sub-area at 80 Hz is obtained. Without changing the driving voltage in the preset direction, each sub-area is controlled to display the target brightness at 100 Hz, and fourth brightness adjustment data corresponding to each sub-area at 100 Hz is obtained. Without changing the driving voltage in the preset direction, each sub-area is controlled to display the target brightness at 125 Hz, and the fifth brightness adjustment data corresponding to each sub-area at 125 Hz is obtained. Without changing the driving voltage in the preset direction, each sub-area is controlled to display the target brightness at 144 Hz, and the sixth brightness adjustment data corresponding to each sub-area at 144 Hz is obtained.

[0091] In one embodiment of the present application, the brightness adjustment data set includes an automatic chromaticity control data set. Figure 10 , Figure 10 This is another step flow chart of pre-debugging the automatic chromaticity control data set provided by an embodiment of the present application, including but not limited to steps S1010 to S1030.

[0092] Step S1010, dividing the display area of ​​the display panel into a plurality of sub-areas;

[0093] Step S1020, without changing the column driving voltage, sequentially controlling each sub-region to display the target brightness at a first preset frequency, a second preset frequency, a third preset frequency, a fourth preset frequency, a fifth frequency, and a sixth frequency that increase in sequence, so as to obtain, for each sub-region, first automatic chromaticity control data at the first preset frequency, second automatic chromaticity control data at the second preset frequency, third automatic chromaticity control data at the third preset frequency, fourth automatic chromaticity control data at the fourth preset frequency, fifth automatic chromaticity control data at the fifth preset frequency, and sixth automatic chromaticity control data at the sixth preset frequency, wherein the first preset frequency is greater than or equal to a lower frequency limit of the display panel in the variable refresh rate mode, and the sixth frequency is greater than or equal to an upper frequency limit of the display panel in the variable refresh rate mode;

[0094] Step S1030 , collecting the first automatic chromaticity control data, the second automatic chromaticity control data, the third automatic chromaticity control data, the fourth automatic chromaticity control data, the fifth automatic chromaticity control data and the sixth automatic chromaticity control data corresponding to each sub-region to obtain an automatic chromaticity control data set.

[0095] In an embodiment of the present application, a display area is first divided into a plurality of sub-areas. Then, without changing a column drive voltage (i.e., a drive voltage in the column direction), each sub-area is sequentially controlled to display a target brightness at a first preset frequency, a second preset frequency, a third preset frequency, a fourth preset frequency, a fifth preset frequency, and a sixth preset frequency, thereby obtaining first automatic color control data, second automatic color control data, third automatic color control data, fourth automatic color control data, fifth automatic color control data, and sixth automatic color control data for each sub-area at the first preset frequency, the second preset frequency, the third preset frequency, the fourth preset frequency, the fifth preset frequency, and the sixth preset frequency. The first automatic color control data, the second automatic color control data, the third automatic color control data, the fourth automatic color control data, the fifth automatic color control data, and the sixth automatic color control data corresponding to each sub-area are then combined to obtain an automatic color control data set.

[0096] For example, the first preset frequency is 48 Hz, the second preset frequency is 52 Hz, the third preset frequency is 80 Hz, the first preset frequency is 100 Hz, the first preset frequency is 125 Hz, and the third preset frequency is 144 Hz. Figure 4, the embodiment of the present application divides the display area into 9 sub-areas. Without changing the column drive voltage (i.e., the drive voltage in the column direction), each sub-area is controlled to display the target brightness at 48 Hz, and the first automatic chromaticity control data corresponding to each sub-area at 48 Hz is obtained. Without changing the column drive voltage, each sub-area is controlled to display the target brightness at 52 Hz, and the second automatic chromaticity control data corresponding to each sub-area at 52 Hz is obtained. Without changing the column drive voltage, each sub-area is controlled to display the target brightness at 80 Hz, and the third automatic chromaticity control data corresponding to each sub-area at 80 Hz is obtained. Without changing the column drive voltage, each sub-area is controlled to display the target brightness at 100 Hz, and the fourth automatic chromaticity control data corresponding to each sub-area at 100 Hz is obtained. Without changing the column drive voltage, each sub-area is controlled to display the target brightness at 125 Hz, and the fifth automatic chromaticity control data corresponding to each sub-area at 125 Hz is obtained. Without changing the column driving voltage, each sub-region is controlled to display the target brightness at 144 Hz, and the sixth automatic chromaticity control data corresponding to each sub-region at 144 Hz is obtained.

[0097] In one embodiment of the present application, a plurality of source driver circuit boards are provided in the non-display area, and the source driver circuit boards are connected to the corresponding sub-areas in the display area through a cover chip film. A gamma voltage adjustment chip is provided on the source driver circuit boards. The brightness adjustment data set includes a gamma compensation voltage data set. Figure 11 , Figure 11 This is another step flow chart of pre-debugging the gamma compensation voltage data set provided by an embodiment of the present application, including but not limited to steps S1110 to S1130.

[0098] Step S1110, dividing the sub-areas driven by the source driver circuit boards in the display area into columns to obtain a plurality of column sub-areas;

[0099] Step S1120, without changing the row driving voltage, sequentially controlling each column sub-region to display a target brightness at a first preset frequency, a second preset frequency, a third preset frequency, a fourth preset frequency, a fifth preset frequency, and a sixth preset frequency that increase in sequence, so as to obtain, for each sub-region, first gamma compensation voltage data at the first preset frequency, second gamma compensation voltage data at the second preset frequency, third gamma compensation voltage data at the third preset frequency, fourth gamma compensation voltage data at the fourth preset frequency, fifth gamma compensation voltage data at the fifth preset frequency, and sixth gamma compensation voltage data at the sixth preset frequency, wherein the first preset frequency is greater than or equal to a lower frequency limit of the display panel in the variable refresh rate mode, and the sixth preset frequency is greater than or equal to an upper frequency limit of the display panel in the variable refresh rate mode;

[0100] Step S1130 : The first gamma compensation voltage data, the second gamma compensation voltage data, the third gamma compensation voltage data, the fourth gamma compensation voltage data, the fifth gamma compensation voltage data and the sixth gamma compensation voltage data corresponding to each column sub-region are collected to obtain a gamma compensation voltage data set.

[0101] In an embodiment of the present application, the sub-regions driven by the respective source driver circuit boards in the display area are divided column-wise to obtain a plurality of column-wise sub-regions. Then, without changing the row drive voltage (i.e., the drive voltage in the row direction), each column-wise sub-region is sequentially controlled to display a target brightness at a first preset frequency, a second preset frequency, a third preset frequency, a fourth preset frequency, a fifth preset frequency, and a sixth preset frequency, thereby obtaining first, second, third, fourth, fifth, and sixth gamma compensation voltage data for each column-wise sub-region at the first, second, third, fourth, fifth, and sixth preset frequencies. The first, second, third, fourth, fifth, and sixth gamma compensation voltage data corresponding to each column-wise sub-region are then aggregated to obtain a gamma compensation voltage dataset.

[0102] For example, the first preset frequency is 48 Hz, the second preset frequency is 52 Hz, the third preset frequency is 80 Hz, the fourth preset frequency is 100 Hz, the fifth preset frequency is 125 Hz, and the sixth preset frequency is 144 Hz. Figure 6, the non-display area is provided with three source driver circuit boards (X-PCBs) 10, and each sub-area driven by each source driver circuit board (X-PCB) 10 is divided into columns to obtain three column sub-areas. Without changing the row drive voltage, each column sub-area is controlled to display the target brightness at 48HZ, and the first gamma compensation voltage data corresponding to each column sub-area at 48HZ is obtained. Without changing the row drive voltage, each column sub-area is controlled to display the target brightness at 52HZ, and the second gamma compensation voltage data corresponding to each column sub-area at 52HZ is obtained. Without changing the row drive voltage, each column sub-area is controlled to display the target brightness at 80HZ, and the third gamma compensation voltage data corresponding to each column sub-area at 80HZ is obtained. Without changing the row drive voltage, each column sub-area is controlled to display the target brightness at 100HZ, and the fourth gamma compensation voltage data corresponding to each column sub-area at 100HZ is obtained. Without changing the row drive voltage, each column sub-region is controlled to display the target brightness at 125 Hz, and the fifth gamma compensation voltage data corresponding to each column sub-region at 125 Hz is obtained. Without changing the row drive voltage, each column sub-region is controlled to display the target brightness at 144 Hz, and the sixth gamma compensation voltage data corresponding to each column sub-region at 144 Hz is obtained.

[0103] In one embodiment of the present application, the brightness adjustment data set includes a row drive compensation data set. Figure 12 , Figure 12 This is another step flow chart of pre-debugging a row drive compensation data set provided by an embodiment of the present application, including but not limited to steps S1210 to S1230.

[0104] Step S1210, dividing the display area into multiple row-wise sub-areas by row-wise division;

[0105] Step S1220, without changing the data voltage, sequentially controlling each row sub-region to display a target brightness at a first preset frequency, a second preset frequency, a third preset frequency, a fourth preset frequency, a fifth frequency, and a sixth frequency that increase in sequence, so as to obtain, for each row sub-region, first row drive compensation data at the first preset frequency, second row drive compensation data at the second preset frequency, third row drive compensation data at the third preset frequency, fourth row drive compensation data at the fourth preset frequency, fifth row drive compensation data at the fifth preset frequency, and sixth row drive compensation data at the sixth preset frequency, wherein the first preset frequency is greater than or equal to a lower frequency limit of the display panel in the variable refresh rate mode, and the sixth frequency is greater than or equal to an upper frequency limit of the display panel in the variable refresh rate mode;

[0106] Step S1230 , the first row drive compensation data, the second row drive compensation data, the third row drive compensation data, the fourth row drive compensation data, the fifth row drive compensation data and the sixth row drive compensation data corresponding to each row sub-region are collected to obtain a row drive compensation data set.

[0107] In an embodiment of the present application, a display area is first divided into a plurality of row-wise sub-areas by row division, and then, without changing a data voltage (i.e., a driving voltage in the column direction), each row-wise sub-area is sequentially controlled to display a target brightness at a first preset frequency, a second preset frequency, a third preset frequency, a fourth preset frequency, a fifth preset frequency, and a sixth preset frequency, so as to obtain first row drive compensation data, second row drive compensation data, third row drive compensation data, fourth row drive compensation data, fifth row drive compensation data, and sixth row drive compensation data for each row-wise sub-area at the first preset frequency, the second preset frequency, the third preset frequency, the fourth preset frequency, the fifth preset frequency, and the sixth preset frequency. The first row drive compensation data, the second row drive compensation data, the third row drive compensation data, the fourth row drive compensation data, the fifth row drive compensation data, and the sixth row drive compensation data corresponding to each row-wise sub-area are then combined to obtain a row drive compensation data set.

[0108] For example, the first preset frequency is 48 Hz, the second preset frequency is 52 Hz, the third preset frequency is 80 Hz, the first preset frequency is 100 Hz, the first preset frequency is 125 Hz, and the third preset frequency is 144 Hz. Figure 8In the embodiment of the present application, the display area is divided into three row sub-areas. Without changing the data voltage (i.e., the driving voltage in the column direction), each row sub-area is controlled to display the target brightness at 48 Hz, and the first row drive compensation data corresponding to each row sub-area at 48 Hz is obtained. Without changing the data voltage, each row sub-area is controlled to display the target brightness at 52 Hz, and the second row drive compensation data corresponding to each row sub-area at 52 Hz is obtained. Without changing the data voltage, each row sub-area is controlled to display the target brightness at 80 Hz, and the third row drive compensation data corresponding to each row sub-area at 80 Hz is obtained. Without changing the data voltage, each row sub-area is controlled to display the target brightness at 100 Hz, and the fourth row drive compensation data corresponding to each row sub-area at 100 Hz is obtained. Without changing the data voltage, each row sub-area is controlled to display the target brightness at 125 Hz, and the fifth row drive compensation data corresponding to each row sub-area at 125 Hz is obtained. Without changing the data voltage, each row sub-region is controlled to display the target brightness at 144 Hz, and the sixth row driving compensation data corresponding to each row sub-region at 144 Hz is obtained.

[0109] In one embodiment of the present application, referring to Figure 13 , Figure 13 This is a flowchart of the steps of determining first target brightness adjustment data from a pre-debugged brightness adjustment data set according to a first frequency, provided by an embodiment of the present application, including but not limited to steps S1310 to S1360.

[0110] Step S1310: When the first frequency is greater than or equal to the frequency lower limit but less than the first preset frequency, the first brightness adjustment data is used as the first target brightness adjustment data;

[0111] Step S1320: When the first frequency is greater than or equal to the first preset frequency but less than the second preset frequency, the second brightness adjustment data is used as the first target brightness adjustment data;

[0112] Step S1330: When the first frequency is greater than or equal to the second preset frequency but less than the third preset frequency, the third brightness adjustment data is used as the first target brightness adjustment data;

[0113] Step S1340: When the first frequency is greater than or equal to the third preset frequency but less than the fourth preset frequency, the fourth brightness adjustment data is used as the first target brightness adjustment data;

[0114] Step S1350: When the first frequency is greater than or equal to the fourth preset frequency but less than the fifth preset frequency, the fifth brightness adjustment data is used as the first target brightness adjustment data;

[0115] In step S1360 , when the first frequency is greater than or equal to the fifth preset frequency but less than or equal to the upper frequency limit, the sixth brightness adjustment data is used as the first brightness adjustment data.

[0116] In an embodiment of the present application, since the brightness adjustment data set includes first brightness adjustment data, second brightness adjustment data, third brightness adjustment data, fourth brightness adjustment data, fifth brightness adjustment data and sixth brightness adjustment data corresponding to each sub-area, the first target brightness adjustment data can be selected from the brightness adjustment data set by judging the size of the first frequency.

[0117] Exemplarily, the first preset frequency is 48 Hz, the second preset frequency is 52 Hz, the third preset frequency is 80 Hz, the fourth preset frequency is 100 Hz, the fifth preset frequency is 125 Hz, and the sixth preset frequency is 144 Hz. At this time, the frequency lower limit is 48 Hz, and the frequency upper limit is 144 Hz. When the first frequency is 48 Hz, since the first frequency is equal to the frequency lower limit, the first brightness adjustment data is selected as the first target brightness adjustment data, that is, the brightness adjustment data at 48 Hz is selected. When the first frequency is 50 Hz, since the first frequency is greater than or equal to the first preset frequency but less than the second preset frequency, the second brightness adjustment data is selected as the first target brightness adjustment data, that is, the brightness adjustment data at 52 Hz is selected. When the first frequency is 60 Hz, since the first frequency is greater than or equal to the second preset frequency but less than the third preset frequency, the third brightness adjustment data is selected as the first target brightness adjustment data, that is, the brightness adjustment data at 80 Hz is selected. When the first frequency is 90 Hz, since the first frequency is greater than or equal to the third preset frequency but less than the fourth preset frequency, the fourth brightness adjustment data is selected as the first target brightness adjustment data, that is, the brightness adjustment data at 100 Hz is selected. When the first frequency is 110 Hz, since the first frequency is greater than or equal to the fourth preset frequency but less than the fifth preset frequency, the fifth brightness adjustment data is selected as the first target brightness adjustment data, that is, the brightness adjustment data at 125 Hz is selected. When the first frequency is 130 Hz, since the first frequency is greater than or equal to the fifth preset frequency but less than the frequency upper limit, the sixth brightness adjustment data is selected as the first target brightness adjustment data, that is, the brightness adjustment data at 144 Hz is selected.

[0118] In one embodiment of the present application, the brightness adjustment data set includes an automatic chromaticity control data set. Correspondingly, determining first target brightness adjustment data from the pre-debugged brightness adjustment data set according to the first frequency, and adjusting the driving voltage applied to each sub-area of ​​the display area when displaying the current frame according to the first target brightness adjustment data includes:

[0119] According to the first frequency, first target automatic chromaticity control data is determined from the automatic chromaticity control data set obtained in advance, so as to adjust the row driving voltage applied to each sub-area of ​​the display area when displaying the current frame according to the first target automatic chromaticity control data.

[0120] In one embodiment of the present application, a plurality of source driver circuit boards are provided in the non-display area, the source driver circuit boards are connected to corresponding sub-areas in the display area via a chip-on-film, a gamma voltage adjustment chip is provided on the source driver circuit boards, a brightness adjustment data set includes a gamma compensation voltage data set, and correspondingly, according to a first frequency, first target brightness adjustment data is determined from a pre-debugged brightness adjustment data set, so as to adjust the driving voltage applied to each sub-area of ​​the display area when displaying a current frame of the image according to the first target brightness adjustment data, including:

[0121] According to the first frequency, the first target gamma compensation voltage data is determined from the gamma compensation voltage data set obtained in advance, so as to send the first target gamma compensation voltage data corresponding to each column sub-area to the gamma voltage adjustment chip on the corresponding source driver circuit board, so that each gamma voltage adjustment chip adjusts the column drive voltage of the corresponding column sub-area according to the corresponding first target gamma compensation voltage data when displaying the current frame image.

[0122] In one embodiment of the present application, the brightness adjustment data set includes a row drive compensation data set. Correspondingly, after determining the first target gamma compensation voltage data from the gamma compensation voltage data set obtained in advance, the first target row drive compensation data corresponding to each row sub-area in the display area is determined from the row drive compensation data set obtained in advance according to the first frequency, wherein the row drive compensation data set includes row drive compensation data of each row sub-area at different frequencies.

[0123] Correspondingly, when the first target gamma compensation voltage data corresponding to each column sub-region is sent to the gamma voltage adjustment chip on the corresponding source driver circuit board, the first target row drive compensation data corresponding to each row sub-region is also sent to the scan line corresponding to each row sub-region, so that each row sub-region displays the target brightness.

[0124] In one embodiment of the present application, a row drive compensation data set includes row drive compensation data for at least three row-direction sub-regions at different frequencies. Correspondingly, when the sub-regions driven by the source driver circuit boards in the display area are divided column-wise to obtain a plurality of column-direction sub-regions, the display area is further divided row-wise to obtain at least three row-direction sub-regions.

[0125] In the embodiment of the present application, when the sub-regions driven by the corresponding source driver circuit boards are divided in the column direction to obtain multiple column sub-regions, the display area can be further divided in the row direction to obtain at least three row sub-regions. Therefore, when the first target gamma compensation voltage data corresponding to each column sub-region is sent to the gamma voltage adjustment chip on the corresponding source driver circuit board, the first target row drive compensation data corresponding to the at least three row sub-regions is also sent to the scan lines corresponding to each row sub-region, so that each row sub-region displays the target brightness. In this way, the display brightness of the multiple row sub-regions obtained by further dividing the column sub-regions in the row direction at different frequencies can be the same.

[0126] Step S130, according to the second frequency, determine the second target brightness adjustment data corresponding to each sub-area from the brightness adjustment data set obtained in advance, and adjust the driving voltage applied to each sub-area when displaying the next frame of the picture according to the second target brightness adjustment data corresponding to each sub-area, so that each sub-area displays the target brightness.

[0127] In this embodiment of the present application, the pre-debugged brightness adjustment data set includes brightness adjustment data for each sub-region of the display area at different frequencies. After obtaining the second frequency, the second target brightness adjustment data corresponding to the second frequency can be determined from the pre-debugged brightness adjustment data set. The drive voltage applied to each sub-region of the display area when displaying the next frame can then be adjusted based on the second target brightness adjustment data so that each sub-region displays the target brightness.

[0128] For example, by detecting the length of the vertical blank gap area, the second frequency is obtained to be 144 Hz. The brightness adjustment data set includes brightness adjustment data for each sub-area of ​​the display area at various frequencies from 48 Hz to 144 Hz. Therefore, the brightness adjustment data at 144 Hz can be directly obtained from the brightness adjustment data set. Therefore, when displaying the current frame, the driving voltage applied to each sub-area of ​​the display area can be adjusted according to the brightness adjustment data at 144 Hz, so that each sub-area displays the target brightness.

[0129] The embodiment of the present application adjusts the driving voltage applied to each sub-area of ​​the display panel according to the target brightness adjustment data at different frequencies, so that the display brightness of each sub-area at different frequencies is the same, which can solve the problem of flickering screen brightness when the frequency is switched.

[0130] In one embodiment of the present application, referring to Figure 14 , Figure 14 is a schematic diagram of the structure of the display device provided in an embodiment of the present application, comprising Figure 14 As shown, the display device includes:

[0131] A display panel 1110 includes a display area and a non-display area surrounding the display area. The display area includes a plurality of scan lines 1 spaced apart along a row direction and a plurality of data lines 2 spaced apart along a column direction and insulated from and intersecting the scan lines 1.

[0132] The timing control circuit board 1120 is connected to the display panel 1110 .

[0133] In the present application, refer to Figure 14 A plurality of source driver circuit boards 10 are provided in the non-display area, and the source driver circuit boards 10 are connected to the display area through a chip-on-film 20 .

[0134] In the present application, refer to Figure 15 , Figure 15 This is a flowchart of the steps executed by the timing control circuit board provided in an embodiment of the present application, including but not limited to steps S1510 to S1530.

[0135] Step S1510, obtaining the first frequency of the current frame and the second frequency of the next frame by detecting the length of the vertical blank gap area;

[0136] Step S1520, determining, based on the first frequency, first target automatic color control data corresponding to each sub-region in the display area from the automatic color control data set obtained in advance, and adjusting the row drive voltage applied to each sub-region when displaying the current frame according to the first target automatic color control data corresponding to each sub-region, so that each sub-region displays the target brightness;

[0137] Step S1530, according to the second frequency, determine the second target automatic chromaticity control data corresponding to each sub-area from the automatic chromaticity control data set obtained in advance, so as to adjust the row driving voltage applied to each sub-area when displaying the next frame of the picture according to the second target automatic chromaticity control data corresponding to each sub-area, so that each sub-area displays the target brightness.

[0138] In the embodiment of this application, Figure 14 In the display device shown, the timing control circuit board 1120 detects the length of the vertical blanking interval to determine the first frequency of the current frame and the second frequency of the next frame. By adjusting the row drive voltages applied to each sub-region of the display panel based on target automatic color control data at different frequencies, the display brightness of each sub-region at different frequencies is maintained constant, thus resolving the issue of flickering brightness when switching between frequencies.

[0139] In one embodiment of the present application, referring to Figure 16 , Figure 16is another structural diagram of the display device provided in an embodiment of the present application, comprising Figure 16 As shown, the display device includes:

[0140] The display panel 1110 includes a display area and a non-display area surrounding the display area. The display area includes a plurality of scan lines 1 spaced apart along the row direction and a plurality of data lines 2 spaced apart along the column direction and insulated and intersecting with the scan lines 1. The non-display area is provided with a plurality of source driver circuit boards 10. The source driver circuit boards 10 are connected to corresponding sub-areas in the display area through a cover chip 20. A gamma voltage adjustment chip 11 is provided on the source driver circuit board 10.

[0141] The system-on-chip 1320 is connected to the source driver circuit board 10 .

[0142] In the present application, refer to Figure 17 , Figure 17 This is a flowchart of the steps executed by the system-level chip provided in an embodiment of the present application, including but not limited to steps S1710 to S1730.

[0143] Step S1710, obtaining the first frequency of the current frame and the second frequency of the next frame by detecting the length of the vertical blank gap area;

[0144] Step S1720: Determine, based on the first frequency, first target gamma compensation voltage data corresponding to each column-oriented sub-region in the display area from the pre-debugged gamma compensation voltage data set, and send the first target gamma compensation voltage data corresponding to each column-oriented sub-region to a gamma voltage adjustment chip on a corresponding source driver circuit board, so that each gamma voltage adjustment chip adjusts the column driving voltage of the corresponding column-oriented sub-region according to the corresponding first target gamma compensation voltage data when displaying the current frame, so that each column-oriented sub-region displays the target brightness;

[0145] Step S1730, according to the second frequency, determine the second target gamma compensation voltage data corresponding to each column sub-area in the display area from the gamma compensation voltage data set obtained in advance, and send the second target gamma compensation voltage data corresponding to each column sub-area to the gamma voltage adjustment chip on the corresponding source driver circuit board, so that each gamma voltage adjustment chip adjusts the column driving voltage of the corresponding column sub-area according to the corresponding second target gamma compensation voltage data when displaying the next frame of the picture, so that each column sub-area displays the target brightness.

[0146] In the embodiment of this application, Figure 16In the display device shown, SoC 1320 detects the length of the vertical blanking interval to determine the first frequency of the current frame and the second frequency of the next frame. By adjusting the column drive voltages applied to each column sub-region of the display panel based on the target gamma compensation voltage data at different frequencies, the display brightness of each column sub-region at different frequencies is consistent, thus resolving the issue of flickering brightness when switching between frequencies.

[0147] The embodiments described in the embodiments of this application are intended to more clearly illustrate the technical solutions of the embodiments of this application and do not constitute a limitation on the technical solutions provided by the embodiments of this application. Those skilled in the art will appreciate that with the evolution of technology and the emergence of new application scenarios, the technical solutions provided in the embodiments of this application are also applicable to similar technical problems.

[0148] Those skilled in the art will understand that the technical solutions shown in the figures do not constitute a limitation on the embodiments of the present application, and may include more or fewer steps than shown in the figures, or a combination of certain steps, or different steps.

[0149] The device embodiments described above are merely illustrative. The units described as separate components may or may not be physically separate, i.e., they may be located in one place or distributed across multiple network units. Some or all of the modules may be selected based on actual needs to achieve the objectives of this embodiment.

[0150] Those skilled in the art will appreciate that all or some of the steps in the methods, systems, and functional modules / units in the devices disclosed above may be implemented as software, firmware, hardware, or appropriate combinations thereof.

[0151] The terms "first", "second", "third", "fourth", etc. (if any) in the specification of the present application and the above-mentioned drawings are used to distinguish similar objects and are not necessarily used to describe a specific order or sequential order. It should be understood that the data used in this way can be interchangeable where appropriate, so that the embodiments of the present application described herein can be implemented in an order other than those illustrated or described herein. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions, for example, a process, method, system, product or device that includes a series of steps or units is not necessarily limited to those steps or units clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0152] It should be understood that in this application, "at least one (item)" means one or more, and "plurality" means two or more. "And / or" is used to describe the association relationship of associated objects, indicating that three relationships may exist. For example, "A and / or B" can mean: only A exists, only B exists, and A and B exist at the same time, where A and B can be singular or plural. The character " / " generally indicates that the previous and next associated objects are in an "or" relationship. "At least one of the following items" or similar expressions refers to any combination of these items, including any combination of single items or plural items. For example, at least one of a, b or c can mean: a, b, c, "a and b", "a and c", "b and c", or "a and b and c", where a, b, c can be single or multiple.

[0153] In the several embodiments provided in this application, it should be understood that the disclosed devices and methods can be implemented in other ways. For example, the device embodiments described above are merely schematic. For example, the division of the above-mentioned units is only a logical function division. In actual implementation, there may be other division methods, such as multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point is that the mutual coupling or direct coupling or communication connection shown or discussed can be through some interfaces, indirect coupling or communication connection of devices or units, which can be electrical, mechanical or other forms.

[0154] The units described above as separate components may or may not be physically separate, and the components shown as units may or may not be physical units, that is, they may be located in one place or distributed across multiple network units. Some or all of these units may be selected according to actual needs to achieve the purpose of the solution of this embodiment.

[0155] In addition, the functional units in the various embodiments of the present application may be integrated into a single processing unit, or each unit may exist physically separately, or two or more units may be integrated into a single unit. The aforementioned integrated units may be implemented in the form of hardware or software functional units.

[0156] If the integrated unit is implemented in the form of a software functional unit and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present application, or the part that contributes to the prior art, or all or part of the technical solution can be embodied in the form of a software product, which is stored in a storage medium and includes multiple instructions for enabling a computer device (which can be a personal computer, server, or network device, etc.) to execute all or part of the steps of the methods of various embodiments of the present application. The aforementioned storage medium includes: various media that can store programs, such as a USB flash drive, a mobile hard disk, a read-only memory (ROM), a random access memory (RAM), a magnetic disk or an optical disk.

[0157] The preferred embodiments of the present invention are described above with reference to the accompanying drawings, but are not intended to limit the scope of the present invention. Any modifications, equivalent substitutions, and improvements made by those skilled in the art without departing from the scope and essence of the present invention should be within the scope of the present invention.

Claims

1. A method for adjusting the brightness of a display panel, wherein the display panel comprises a display area and a non-display area surrounding the display area, wherein the display area comprises a plurality of scan lines spaced apart in a row direction and a plurality of data lines spaced apart in a column direction and insulated from and intersecting the scan lines; The method comprises: By detecting the length of the vertical blank gap area, the first frequency of the current frame and the second frequency of the next frame are respectively obtained; determining, according to the first frequency, first target brightness adjustment data corresponding to each sub-region in the display area from a pre-debugged brightness adjustment data set, and adjusting a driving voltage applied to each sub-region when displaying the current frame according to the first target brightness adjustment data corresponding to each sub-region, so that each sub-region displays a target brightness; According to the second frequency, the second target brightness adjustment data corresponding to each of the sub-areas is determined from the brightness adjustment data set obtained in advance, so as to adjust the driving voltage applied to each of the sub-areas when displaying the next frame of the picture according to the second target brightness adjustment data corresponding to each of the sub-areas, so that each of the sub-areas displays the target brightness.

2. The method according to claim 1, characterized in that Pre-debugging the brightness adjustment data set includes: Dividing the display area into a plurality of sub-areas; Without changing the driving voltage in the preset direction, controlling each of the sub-regions to display the target brightness at the same frequency, so as to obtain brightness adjustment data corresponding to each of the sub-regions; The brightness adjustment data of each sub-region at different frequencies are collected to obtain a brightness adjustment data set.

3. The method according to claim 1, characterized in that Pre-debugging to obtain the brightness adjustment data set includes: Dividing the display area into a plurality of sub-areas; Without changing the driving voltage in the preset direction, sequentially controlling each of the sub-areas to display the target brightness at a first preset frequency, a second preset frequency, a third preset frequency, a fourth preset frequency, a fifth preset frequency, and a sixth preset frequency that increase in sequence, so as to obtain first brightness adjustment data of each of the sub-areas at the first preset frequency, second brightness adjustment data at the second preset frequency, third brightness adjustment data at the third preset frequency, fourth brightness adjustment data at the fourth preset frequency, fifth brightness adjustment data at the fifth preset frequency, and sixth brightness adjustment data at the sixth preset frequency, wherein the first preset frequency is greater than or equal to a lower frequency limit value of the display panel in the variable refresh rate mode, and the sixth preset frequency is less than or equal to an upper frequency limit value of the display panel in the variable refresh rate mode; The first brightness adjustment data, the second brightness adjustment data, the third brightness adjustment data, the fourth brightness adjustment data, the fifth brightness adjustment data, and the sixth brightness adjustment data corresponding to each of the sub-regions are collected to obtain a brightness adjustment data set.

4. The method according to claim 2 or 3, characterized in that The brightness adjustment data set includes an automatic chromaticity control data set; Correspondingly, when the automatic chromaticity control data set is obtained by pre-debugging, the preset direction is the column direction; Correspondingly, determining, according to the first frequency, first target brightness adjustment data corresponding to each sub-area in the display area from a pre-debugged brightness adjustment data set, so as to adjust a driving voltage applied to each sub-area when displaying the current frame according to the first target brightness adjustment data corresponding to each sub-area includes: According to the first frequency, the first target automatic chromaticity control data corresponding to each of the sub-areas is determined from the automatic chromaticity control data set obtained in advance, so as to adjust the row driving voltage applied to each of the sub-areas when displaying the current frame image according to the first target automatic chromaticity control data corresponding to each of the sub-areas.

5. The method according to claim 2 or 3, characterized in that The non-display area is provided with a plurality of source driver circuit boards, the source driver circuit boards are connected to corresponding sub-areas in the display area via a chip-on-film, a gamma voltage adjustment chip is provided on the source driver circuit boards, and the brightness adjustment data set includes a gamma compensation voltage data set; Correspondingly, when the gamma compensation voltage data set is obtained by pre-debugging, the preset direction is the row direction; Correspondingly, the display area is divided into multiple sub-areas including: Dividing the sub-regions driven by the source driver circuit boards in the display region into columns to obtain a plurality of column sub-regions; Correspondingly, determining, according to the first frequency, first target brightness adjustment data corresponding to each sub-area in the display area from a pre-debugged brightness adjustment data set, so as to adjust a driving voltage applied to each sub-area when displaying the current frame according to the first target brightness adjustment data corresponding to each sub-area includes: According to the first frequency, the first target gamma compensation voltage data corresponding to each of the column-oriented sub-areas is determined from the gamma compensation voltage data set obtained in advance, so as to send the first target gamma compensation voltage data corresponding to each of the column-oriented sub-areas to the corresponding gamma voltage adjustment chip on the source driver circuit board, so that each of the gamma voltage adjustment chips adjusts the column drive voltage of the corresponding column-oriented sub-area according to the corresponding first target gamma compensation voltage data when displaying the current frame image.

6. The method according to claim 5, characterized in that The method further comprises: determining, according to the first frequency, first target row drive compensation data corresponding to each row sub-region in the display area from a row drive compensation data set obtained in advance, the row drive compensation data set including row drive compensation data of each row sub-region at different frequencies; When the first target gamma compensation voltage data corresponding to each of the column-oriented sub-areas is sent to the gamma voltage adjustment chip on the corresponding source driver circuit board, the first target row drive compensation data corresponding to each of the row-oriented sub-areas is also sent to the scan line corresponding to each of the row-oriented sub-areas, so that each of the row-oriented sub-areas displays the target brightness.

7. The method according to claim 6, characterized in that The row drive compensation data set includes row drive compensation data of at least three row sub-regions at different frequencies; Correspondingly, when each sub-area driven by each source driver circuit board in the display area is divided column-wise to obtain a plurality of column-wise sub-areas, the display area is further divided row-wise to obtain at least three row-wise sub-areas.

8. The method according to claim 5, characterized in that In the process of pre-debugging the gamma compensation voltage data set, after obtaining the gamma compensation voltage data corresponding to each of the sub-regions, the method includes: Encoding each of the gamma compensation voltage data so that each of the gamma compensation voltage data has a corresponding encoding value; Correspondingly, the step of sending the first target gamma compensation voltage data corresponding to each column sub-region to the gamma voltage adjustment chip on the corresponding source driver circuit board so that each gamma voltage adjustment chip adjusts the column drive voltage of the corresponding column sub-region according to the corresponding first target gamma compensation voltage data when displaying the current frame is as follows: The first target coding value and device address bit corresponding to each of the column-oriented sub-areas are sent to the gamma voltage adjustment chip on the corresponding source driver circuit board, so that each of the gamma voltage adjustment chips recognizes the device address bit to receive the first target coding value, and recognizes the first target coding value to obtain the corresponding first target gamma compensation voltage data, so that when displaying the current frame image, the column drive voltage of the corresponding column-oriented sub-area is adjusted according to the first target gamma compensation voltage data.

9. A display device, characterized in that: The display device includes: A display panel comprising a display area and a non-display area surrounding the display area, wherein the display area comprises a plurality of scan lines spaced apart along a row direction and a plurality of data lines spaced apart along a column direction and insulated from and intersecting the scan lines; A timing control circuit board connected to the display panel; The timing control circuit board is used to perform the following steps: By detecting the length of the vertical blank gap area, the first frequency of the current frame and the second frequency of the next frame are respectively obtained; determining, according to the first frequency, first target automatic chromaticity control data corresponding to each sub-region in the display area from a pre-debugged automatic chromaticity control data set, and adjusting a row driving voltage applied to each sub-region when displaying the current frame according to the first target automatic chromaticity control data corresponding to each sub-region, so that each sub-region displays a target brightness; According to the second frequency, the second target automatic chromaticity control data corresponding to each of the sub-areas is determined from the automatic chromaticity control data set obtained in advance, so as to adjust the row driving voltage applied to each of the sub-areas when displaying the next frame of the picture according to the second target automatic chromaticity control data corresponding to each of the sub-areas, so that each of the sub-areas displays the target brightness.

10. A display device, characterized in that: The display device includes: A display panel, the display panel comprising a display area and a non-display area surrounding the display area, the display area comprising a plurality of scan lines spaced apart along a row direction and a plurality of data lines spaced apart along a column direction and insulated from and intersecting the scan lines; the non-display area being provided with a plurality of source driver circuit boards, the source driver circuit boards being connected to corresponding sub-areas in the display area via a chip-on-film (COF), and the source driver circuit boards being provided with a gamma voltage regulation chip; A system-level chip connected to the source driver circuit board; The system-on-chip is configured to perform the following steps: By detecting the length of the vertical blank gap area, the first frequency of the current frame and the second frequency of the next frame are respectively obtained; determining, according to the first frequency, first target gamma compensation voltage data corresponding to each column-oriented sub-region in the display area from a gamma compensation voltage data set obtained in advance, and sending the first target gamma compensation voltage data corresponding to each column-oriented sub-region to the gamma voltage adjustment chip on the corresponding source driver circuit board, so that each gamma voltage adjustment chip adjusts the column driving voltage of the corresponding column-oriented sub-region according to the corresponding first target gamma compensation voltage data when displaying the current frame image, so that each column-oriented sub-region displays a target brightness; According to the second frequency, the second target gamma compensation voltage data corresponding to each column sub-area in the display area is determined from the gamma compensation voltage data set obtained in advance, so as to send the second target gamma compensation voltage data corresponding to each column sub-area to the corresponding gamma voltage adjustment chip on the source driver circuit board, so that when each gamma voltage adjustment chip displays the next frame of the picture, it adjusts the column drive voltage of the corresponding column sub-area according to the corresponding second target gamma compensation voltage data, so that each column sub-area displays the target brightness.

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