Device and method for adjusting brightness of display panel and display device

Abstract

The invention discloses a device and a method for adjusting the brightness of a display panel and a display device. The method comprises the following steps: dividing a display area into a plurality of first areas and a plurality of second areas which are periodically alternated; opening the pixel units of the plurality of first areas, closing the pixel units of the plurality of second areas, and obtaining first brightness of all the first areas; opening the pixel units of the plurality of second areas, closing the pixel units of the plurality of first areas, and obtaining second brightness of all the second areas; obtaining a difference value between the first brightness and the second brightness; if the difference value is smaller than or equal to a preset brightness threshold value, the brightness of the pixel units of the first area or the second area is not adjusted; and in response to the condition that the difference value is greater than a preset brightness threshold value, adjusting the brightness of the pixel unit with the smaller brightness in the first region and the second region. The operation is simple, the brightness judgment of different areas of the display panel is accurate, and the problem that the display picture is not uniform can be effectively improved.

Description

Technical Field

[0001] The present application relates to the field of display technology, and more particularly to a device and method for adjusting the brightness of a display panel, and a display device. Background Art

[0002] In recent years, cost and power pressures on LCD (Liquid Crystal Display) panels have increased significantly due to driver IC shortages, rising semiconductor raw material prices, and client power consumption requirements. Many end-users are urging manufacturers to reduce the number of source ICs (source driver circuits) to lower costs and power consumption to meet market demand. This has led to uneven display of solid-color images. Summary of the Invention

[0003] In view of this, the present application provides a device, method and display device for adjusting the brightness of a display panel to solve the problem of uneven display of pure color images in the prior art.

[0004] In order to solve the above technical problems, the first technical solution provided by this application is to provide a method for adjusting the brightness of a display panel, comprising:

[0005] Dividing the display area into a plurality of first areas and a plurality of second areas that periodically alternate;

[0006] Turning on a plurality of pixel units in the first area, turning off a plurality of pixel units in the second area, and acquiring a first brightness of all the first areas;

[0007] Turning on a plurality of pixel units in the second area, turning off a plurality of pixel units in the first area, and acquiring a second brightness of all the second areas;

[0008] Obtaining a difference between the first brightness and the second brightness;

[0009] In response to the difference being less than or equal to a preset brightness threshold, not adjusting the brightness of the pixel units in the first area or the second area;

[0010] In response to the difference being greater than the preset brightness threshold, the brightness of the pixel unit with the smaller brightness in the first area or the second area is adjusted.

[0011] In one embodiment, the method further comprises repeating all the above steps at different grayscales; wherein, at different grayscales, the preset brightness threshold is different.

[0012] In one embodiment, the display panel is an 8-bit panel; the preset brightness threshold of the 8-bit panel at gray level n is the brightness difference between the 9-bit panel at gray level 2n and the adjacent gray level 2n+1.

[0013] In one embodiment, the display area is provided with a plurality of rows and columns of pixel units arranged in a matrix;

[0014] The method of dividing the display area into a plurality of first areas and a plurality of second areas that are periodically alternated comprises:

[0015] Along a row direction, the display area is divided into a plurality of alternating first areas and a plurality of second areas; each of the first area and the second area includes a column of pixel units; wherein a is an integer greater than or equal to 1 and less than or equal to 10; or

[0016] Dividing the display area into a plurality of alternating first areas and a plurality of second areas along a column direction; each of the first area and the second area includes a row of pixel units; wherein a is an integer greater than or equal to 1 and less than or equal to 10; or

[0017] Along the oblique direction, the display area is divided into a plurality of alternating first areas and a plurality of second areas; the first area and the second area each include a columns or a rows of pixel units; wherein a is an integer greater than or equal to 1 and less than or equal to 10.

[0018] In one embodiment, the method further includes: taking a as all integers less than or equal to N, and repeating all the above steps; wherein N is an integer greater than 1 and less than or equal to 10.

[0019] In one embodiment, the display area is provided with a plurality of rows and columns of pixel units arranged in a matrix;

[0020] The method of dividing the display area into a plurality of first areas and a plurality of second areas that are periodically alternated comprises:

[0021] enabling pixel units in the display area to display images;

[0022] magnifying a local area of the display area using an optical microscope;

[0023] Acquire the brightness of each pixel unit in the magnified area by an optical detection device;

[0024] The brightness periodic arrangement rule of the pixel units in the amplified area is analyzed, and the bright area of the display area is used as the first area, and the dark area is used as the second area.

[0025] In one embodiment, turning on the plurality of pixel units in the first region includes turning on all sub-pixels in the plurality of pixel units in the first region; turning on the plurality of pixel units in the second region includes turning on all sub-pixels in the plurality of pixel units in the second region; or

[0026] The step of turning on the plurality of pixel units in the first area includes: turning on some sub-pixels of the plurality of pixel units in the first area; the step of turning on the plurality of pixel units in the second area includes: turning on some sub-pixels of the plurality of pixel units in the second area; wherein the turned-on sub-pixels of the pixel units in the first area have the same color as the turned-on sub-pixels of the pixel units in the second area.

[0027] In order to solve the above technical problems, the second technical solution provided by the present application is to provide a device for adjusting the brightness of a display panel, comprising:

[0028] a dividing module, configured to divide a display area into a plurality of first areas and a plurality of second areas that are periodically alternated;

[0029] an acquisition module, configured to acquire a first brightness of all the first areas, and acquire a second brightness of all the second areas;

[0030] a control module, configured to control a plurality of pixel units in the first area to turn on, a plurality of pixel units in the second area to turn off, and control the acquisition module to acquire a first brightness of all the first areas; and control a plurality of pixel units in the second area to turn on, a plurality of pixel units in the first area to turn off, and control the acquisition module to acquire a second brightness of all the second areas;

[0031] a comparison module, configured to obtain a difference between the first brightness and the second brightness;

[0032] A brightness adjustment module is configured to: in response to the difference being less than or equal to a preset brightness threshold, not adjust the brightness of the pixel unit in the first area or the second area; and in response to the difference being greater than the preset brightness threshold, adjust the brightness of the pixel unit with the smaller brightness in the first area or the second area.

[0033] In order to solve the above technical problems, the third technical solution provided by the present application is to provide a display device, comprising:

[0034] Display panel;

[0035] a driving circuit storing gamma correction data;

[0036] The gamma correction data is obtained according to any one of the above methods for adjusting the brightness of a display panel.

[0037] In order to solve the above technical problems, the fourth technical solution provided by the present application is to provide a display device, comprising:

[0038] Display panel;

[0039] A driving circuit, used for driving the display panel to display an image;

[0040] The display screen of the display panel includes a plurality of first areas and a plurality of second areas that alternate periodically; and a brightness difference between the first areas and the second areas is less than or equal to 0.4%.

[0041] The beneficial effects of the present application are as follows: Different from the prior art, the method for adjusting the brightness of a display panel of the present application includes: dividing a display area into a plurality of first areas and a plurality of second areas that alternate periodically; turning on a plurality of pixel units in the first areas and turning off a plurality of pixel units in the second areas, and obtaining a first brightness of all the first areas; turning on a plurality of pixel units in the second areas and turning off a plurality of pixel units in the first area, and obtaining a second brightness of all the second areas; obtaining a difference between the first brightness and the second brightness; in response to the difference being less than or equal to a preset brightness threshold, not adjusting the brightness of the pixel units in the first area or the second area; in response to the difference being greater than the preset brightness threshold, adjusting the brightness of the pixel unit with the smaller brightness in the first area or the second area. The present application obtains the brightness difference between different areas of the display panel and compares the difference with the preset brightness threshold to determine whether the corresponding display area needs to be adjusted, and adjusts the brightness of the pixel unit with the smaller brightness in the display area according to the comparison result. The method is simple to operate, accurately determines the brightness of different areas of the display panel, and can effectively improve the problem of uneven display images and enhance the display effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0042] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technical workers in this field, other drawings can be obtained based on these drawings without creative work.

[0043] Figure 1 This is a flowchart of a method for adjusting the brightness of a display panel provided in this application;

[0044] Figure 2This is a schematic diagram of a normal display screen of the display area provided in Example 1 of the present application;

[0045] Figure 3 Schematic diagram of uneven brightness of a display screen in a display area provided in the first embodiment of the present application; wherein the display area is divided into a plurality of first areas and a plurality of second areas that periodically alternate along a column direction, and all sub-pixels of pixel units in the plurality of first areas and the plurality of second areas are turned on;

[0046] Figure 4 This is a schematic diagram of turning on a plurality of pixel units in a first area and turning off a plurality of pixel units in a second area, provided in the first embodiment of the present application;

[0047] Figure 5 This is a schematic diagram of turning on a plurality of pixel units in the second area and turning off a plurality of pixel units in the first area, provided in the first embodiment of the present application;

[0048] Figure 6 1 is a schematic diagram of a normal display screen of a display area provided in the second embodiment of the present application; wherein, some sub-pixels of pixel units in the first regions and the second regions are turned on;

[0049] Figure 7 Schematic diagram of uneven brightness of a display screen in a display area provided by the second embodiment of the present application; wherein the display area is divided into a plurality of first areas and a plurality of second areas that periodically alternate along the row direction;

[0050] Figure 8 This is a schematic diagram of turning on a plurality of pixel units in a first area and turning off a plurality of pixel units in a second area, provided in the second embodiment of the present application;

[0051] Figure 9 This is a schematic diagram of turning on a plurality of pixel units in the second area and turning off a plurality of pixel units in the first area, provided in the second embodiment of the present application;

[0052] Figure 10 1 is a schematic diagram of uneven brightness of a display screen in a display area provided by the third embodiment of the present application; wherein, some sub-pixels of pixel units in a plurality of first areas and a plurality of second areas are turned on;

[0053] Figure 11 This is a schematic diagram of turning on a plurality of pixel units in a first area and turning off a plurality of pixel units in a second area, provided in the third embodiment of the present application; wherein the display area is divided into a plurality of first areas and a plurality of second areas that periodically alternate along the column direction;

[0054] Figure 12This is a schematic diagram of turning on a plurality of pixel units in the second area and turning off a plurality of pixel units in the first area, provided in the third embodiment of the present application; wherein the display area is divided into a plurality of first areas and a plurality of second areas that periodically alternate along the column direction;

[0055] Figure 13 Schematic diagram of uneven brightness of a display screen in a display area provided by a fourth embodiment of the present application; wherein all sub-pixels of pixel units in a plurality of first areas and a plurality of second areas are turned on, and the display area is divided into a plurality of first areas and a plurality of second areas that periodically alternate along an oblique direction;

[0056] Figure 14 This is a schematic diagram of turning on a plurality of pixel units in a first area and turning off a plurality of pixel units in a second area, provided in the fourth embodiment of the present application; wherein the display area is divided into a plurality of first areas and a plurality of second areas that periodically alternate along an oblique direction;

[0057] Figure 15 This is a schematic diagram of turning on multiple pixel units in the second area and turning off multiple pixel units in the first area, provided in the fourth embodiment of the present application; wherein the display area is divided into multiple first areas and multiple second areas that periodically alternate along the oblique direction;

[0058] Figure 16 yes Figure 1 A flowchart of the sub-steps of step S1 is provided;

[0059] Figure 17 This application provides an image diagram showing the brightness of different display areas confirmed by an optical microscope;

[0060] Figure 18 is a structural schematic diagram of a liquid crystal display panel provided by this application;

[0061] Figure 19 This is a table of correspondence between preset brightness thresholds and grayscale values provided in this application;

[0062] Figure 20 This is a graph showing the relationship between the preset brightness threshold and the grayscale value provided by this application;

[0063] Figure 21 This is the gamma 2.2 brightness curve of the 9-bit display panel provided by this application;

[0064] Figure 22 This is a schematic diagram of the workflow of the method for adjusting the brightness of a display panel provided in this application;

[0065] Figure 23 This is a schematic diagram of module connections of a device for adjusting display panel brightness provided in this application;

[0066] Figure 24 This is a schematic diagram of module connections of a display device provided in one embodiment of the present application;

[0067] Figure 25 This is a schematic diagram of module connections of a display device provided in another embodiment of the present application.

[0068] Description of reference numerals:

[0069] 10. Display area; 11. First area; 12. Second area; 13. Pixel unit; 131. Sub-pixel; 20. Opposite substrate; 201. Color filter substrate; 21. First substrate; 22. Transparent conductive layer; 23. Black matrix; 24. First polarizer; 25. Color filter; 30. Liquid crystal layer; 31. Liquid crystal molecules; 40. Array substrate; 41. Second substrate; 42. Thin film transistor; 43. Second polarizer; 44. Pixel electrode; 100. Display panel; 200. Device for adjusting the brightness of the display panel; 210. Division module; 220. Acquisition module; 230. Comparison module; 240. Brightness adjustment module; 250. Control module; 300. Display device; 320. Driving circuit; 321. Gamma correction data. DETAILED DESCRIPTION

[0070] The following will be combined with the accompanying drawings in the embodiments of this application to clearly and completely describe the technical solutions in the embodiments of this application. Obviously, the embodiments described are only part of the embodiments of this application, not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of this application.

[0071] The terms "first", "second" and "first" in this application are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, the features defined as "first" and "second" can explicitly or implicitly include at least one of these features. In the embodiments of the present application, all directional indications (such as up, down, left, right, front, back ...) are only used to explain the relative positional relationship, movement, etc. between the various components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication also changes accordingly. In addition, the terms "including" and "having" and any of their variations 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 limited to the steps or units listed, but optionally also includes steps or units that are not listed, or optionally also includes other steps or units inherent to these processes, methods, products or devices.

[0072] References herein to "embodiments" mean that a particular feature, structure, or characteristic described in connection with the embodiments may be included in at least one embodiment of the present application. The appearance of this phrase in various places in the specification does not necessarily refer to the same embodiment, nor does it constitute an independent or alternative embodiment that is mutually exclusive of other embodiments. It is understood, both explicitly and implicitly, that the embodiments described herein may be combined with other embodiments.

[0073] In related technologies, the cost and power consumption pressures of LCD (Liquid Crystal Display) panels have increased significantly due to the shortage of driver ICs, rising raw material prices in the semiconductor industry, and client power consumption requirements. In related technologies, many end customers urge the reduction of the number of source ICs (source driver circuits) to reduce costs and power consumption to meet market demand. Therefore, target screen manufacturers usually adopt Dual-Gate technology (also known as DRD, Dual-Rate Driving) and Triple-Gate technology (also known as TRD, Triple-Rate Driving) plus line inversion (Line Inversion) type low-power drive modes to achieve the above goals, such as reducing the use of ICs through 2G1D (two gate lines Gate, one data line Data). Due to the drive method and the reduction in source ICs, some solid-color images are prone to uneven charging due to uneven distribution of data or gate lines. Alternatively, Vcom (common voltage) offset, LOD (Line Over-Drive) strength, and other factors can cause bright and dark lines. These can include, but are not limited to, one row (column, diagonal row) dark and one row (column, diagonal row) bright; two rows (column, diagonal row) dark and two rows (column, diagonal row) bright; or three rows (column, diagonal row) dark and three rows (column, diagonal row) bright. Currently, the industry generally uses subjective visual judgment to determine bright and dark lines (i.e., uneven brightness). This method is prone to individual differences, leading to inconsistent standards for determining bright and dark lines, and thus customer complaints.

[0074] In order to solve the above problems, this application will propose a new quantifiable objective judgment method and device for bright and dark lines / display defects to enhance image quality. At the same time, it will also facilitate the unification of judgment standards between clients and suppliers, avoiding customer complaints caused by subjective cognitive differences.

[0075] See also Figures 1 to 22 The method for adjusting the brightness of a display panel provided in this application may include the following steps:

[0076] S1: Divide the display area into a plurality of first areas and a plurality of second areas that alternate periodically.

[0077] Specifically, the display area 10 may be the entire area or a portion of the display screen of the display panel 100. In the embodiment provided in this application, the entire area is used. The periodic alternation of multiple first areas 11 and multiple second areas 12 can be understood as: one first area 11, one second area 12, another first area 11, another second area 12, and so on to form multiple first areas 11 and multiple second areas 12. Among them, the display panel 100 may be a liquid crystal display panel (LCD), an LED display panel (Light Emitting Diode), or an OLED display panel (Organic Light Emitting Diode).

[0078] Specifically, in this embodiment, a liquid crystal display panel 100 is used as an example for description. The liquid crystal display panel 100 may include an opposing substrate 20, an array substrate 40, and a liquid crystal layer 30 disposed between the opposing substrate 20 and the array substrate 40. The liquid crystal layer 30 may include a plurality of liquid crystal molecules 31. The opposing substrate 20 may specifically be a color filter substrate 201, which is used to provide color. Figure 18 As shown, the color filter substrate 201 may include a first substrate 21, a color filter 25, a black matrix 23 and a transparent conductive layer 22 located on the side of the first substrate 21 close to the array substrate 40, and a first polarizer 24 located on the side of the first substrate 21 away from the array substrate 40. The color filter 25 may include three color filters of red (R), green (G) and blue (B). The color filter filters the white light emitted by the backlight source of the liquid crystal display panel 100 and separates the three basic colors of red, green and blue. Each pixel unit 13 is composed of three sub-pixels 131 of red, green and blue, and each sub-pixel 131 corresponds to a color filter. The array substrate 40 includes a second substrate 41, a thin film transistor 42 and a pixel electrode 44 located on the side of the second substrate 41 close to the opposite substrate 20, and a second polarizer 43 located on the side of the second substrate 41 away from the flexible opposite substrate 20. The array substrate 40 may also include other functional layers, which are not limited here.

[0079] In one embodiment, the display area 10 is provided with a plurality of rows and columns of pixel units 13 arranged in a matrix. For example, in a specific DRD structure, multiple RGB sub-pixels 131 are periodically arranged along the row direction; along the column direction, the sub-pixels 131 in the same column have the same color.

[0080] The step S1 of dividing the display area 10 into a plurality of first areas 11 and a plurality of second areas 12 that periodically alternate may include:

[0081] like Figures 2 to 5、 Figures 10 to 12 As shown, the display area 10 is divided into a plurality of alternating first areas 11 and a plurality of second areas 12 along the row direction; each of the first area 11 and the second area 12 includes a column of pixel units 13. Wherein, a is an integer greater than or equal to 1 and less than or equal to 10.

[0082] Or, as Figures 7 to 9 As shown, the display area 10 is divided into a plurality of alternating first areas 11 and a plurality of second areas 12 along the column direction; each of the first area 11 and the second area 12 includes a row of pixel units 13. Wherein, a is an integer greater than or equal to 1 and less than or equal to 10.

[0083] Or, as Figures 13 to 15 As shown, the display area 10 is divided into a plurality of alternating first areas 11 and a plurality of second areas 12 along the oblique direction; each of the first area 11 and the second area 12 includes a columns or a rows of pixel units 13. Wherein, a is an integer greater than or equal to 1 and less than or equal to 10.

[0084] In one embodiment, the method for adjusting the brightness of the display panel may further include: taking a as all integers less than or equal to N, and repeating all the above steps. Wherein, N is an integer greater than 1 and less than or equal to 10. For example, when N is 3, a is 1, 2, and 3 respectively. It can be understood that the first area 11 and the second area 12 both include a rows or a columns of pixel units 13, where a can be a minimum of 1 and a maximum of 10, thereby facilitating the measurement of the brightness of the pixel units 13 of multiple first areas 11 and multiple second areas 12, while ensuring the accuracy of the measurement and avoiding the problem of large brightness differences within the same display area 10 caused by excessively large a values.

[0085] In one embodiment, if Figure 16 As shown, step S1 of dividing the display area 10 into a plurality of first areas 11 and a plurality of second areas 12 that periodically alternate may include the following steps:

[0086] S11: The pixel units 13 of the display area 10 are caused to display an image.

[0087] Specifically, for example, the pixel unit 13 can be controlled to display a pure white image by controlling the output voltage of the driving circuit 320 and the deflection angle of the liquid crystal molecules 31 .

[0088] S12: A local area of the display area 10 is magnified using an optical microscope.

[0089] Specifically, such as Figure 17As shown, a local area of the display area 10 is magnified through an optical microscope, so that the display brightness of different display areas 10 can be intuitively seen. Compared with directly observing the display area 10 with the eyes, the display brightness of the pixel units 13 of different display areas 10 can be observed more accurately through an optical microscope.

[0090] S13: Obtain the brightness of each pixel unit 13 in the magnified area through an optical detection device.

[0091] Specifically, for example, the optical detection device may be an optical camera, and the brightness of each pixel unit 13 in the magnified area is obtained by the optical detection device, so that the obtained display brightness of the pixel unit 13 is more accurate.

[0092] S14 : analyzing the periodic arrangement pattern of the brightness of the pixel units 13 in the magnified area, and taking the bright area of the display area 10 as the first area 11 and the dark area as the second area 12 .

[0093] Specifically, by comparing and analyzing the brightness of the pixel units 13 in the magnified area, it is possible to determine whether the brightness of different display areas 10 is arranged periodically. In the liquid crystal display panel 100, the brightness of different display areas 10 is generally arranged periodically. Therefore, the display area 10 can be divided into a first area 11 and a second area 12 according to the brightness of different display areas 10, where the first area 11 can be a bright area and the second area 12 can be a dark area.

[0094] For example, Figure 17 As shown, a 21.5-inch 8-bit new model was used to confirm that the bright and dark lines were arranged periodically with two bright columns and two dark columns under an optical microscope. Figure 17 The first area 11 shown comprises two columns of bright areas. Figure 17 The second region 12 shown includes two rows of dark areas. Measurement and Vcom auto-tuning data are shown in Tables 1 to 4 below. The y value for the 32-grayscale G32_60Hz / 120Hz is set to 3%, and the y value for the 64-grayscale G64_60Hz / 120Hz is set to 1.7%. When the Vcom auto-tuning voltages for G25_60Hz are 4.842V, G64_60Hz is 4.905V, G25_120Hz is 5.015V, and G64_120Hz is 5.062V, the bright and dark lines are invisible, resulting in optimal image quality on the display.

[0095]

[0096]

[0097]

[0098]

[0099] S2: turning on the pixel units 13 of the plurality of first regions 11 , turning off the pixel units 13 of the plurality of second regions 12 , and acquiring the first brightness of all the first regions 11 .

[0100] Turning the pixel unit 13 of the LCD on or off means adjusting the deflection of the liquid crystal molecules 31 by controlling the voltage, thereby controlling whether light can pass through or not, and further determining the brightness or darkness of the pixel unit 13. Specifically, the red, green, and blue sub-pixels 131 of each pixel unit 13 of the LCD control the passage of light through the liquid crystal layer 30 and the first polarizer 24. When a voltage is applied, the liquid crystal molecules 31 will deflect, changing the propagation direction of the light, making it impossible for the light to pass through the first polarizer 24 on the upper layer of the liquid crystal layer 30. At this time, the pixel unit 13 is in the "off" state and appears as a dark spot. Conversely, when no voltage is applied, the liquid crystal molecules 31 remain in their natural state, light can pass through the first polarizer 24 smoothly, and the pixel unit 13 is in the "on" state and appears as a bright spot.

[0101] In one embodiment, if Figures 2 to 4 、 Figures 13 to 15 As shown, turning on the plurality of pixel units 13 of the first region 11 in step S2 may include turning on all sub-pixels 131 of the plurality of pixel units 13 of the first region 11. That is, turning on the red, green, and blue sub-pixels 131 of each pixel unit 13 of the first region 11. Turning off the plurality of pixel units 13 of the second region 12 may include turning off all the red, green, and blue sub-pixels 131 of each pixel unit 13 of the second region 12. Figure 5 shown.

[0102] In another embodiment, turning on the plurality of pixel units 13 of the first region 11 in step S2 may further include: turning on some sub-pixels 131 of the pixel units 13 of the first region 11, such as Figures 6 to 8 、 Figures 10 and 11 That is, one or two sub-pixels 131 of each pixel unit 13 in the first area 11 are turned on, and the remaining sub-pixels 131 are not turned on. For example, each pixel unit 13 only turns on the green and blue sub-pixels 131, and the red sub-pixel 131 is not turned on. In this embodiment, Figure 8 and Figure 11 As shown, the plurality of pixel units 13 in the second area 12 are turned off, specifically, the red, green and blue sub-pixels 131 of each pixel unit 13 in the second area 12 are all turned off.

[0103] Obtaining the first brightness of all first regions 11 can include measuring the first brightness of each first region 11 using a brightness measuring device, then averaging the first brightness of all first regions 11 to obtain the average brightness of all first regions 11 as the first brightness. Obtaining the average of all first brightnesses as the first brightness improves the accuracy of brightness measurement and avoids data inaccuracies caused by uneven first brightness across multiple first regions 11 or partial data collection. For example, the first brightness can be measured using a high-precision optical measuring instrument, such as a CA310 / CA410 / CS2000. Specifically, the first brightness of the first region 11 obtained in this step can be recorded as Lv._A.

[0104] S3: turning on the pixel units 13 of the plurality of second areas 12 , turning off the pixel units 13 of the plurality of first areas 11 , and acquiring the second brightness of all the second areas 12 .

[0105] In one embodiment, if Figure 5 and Figure 15 As shown, turning on the plurality of pixel units 13 in the second region 12 includes turning on all sub-pixels 131 in the plurality of pixel units 13 in the second region 12. That is, turning on the red, green, and blue sub-pixels 131 in each pixel unit 13 in the second region 12. Turning off the plurality of pixel units 13 in the first region 11 specifically includes turning off all red, green, and blue sub-pixels 131 in each pixel unit 13 in the first region 11.

[0106] In another embodiment, Figure 9 and Figure 12 As shown, turning on the plurality of pixel units 13 in the second region 12 includes turning on some of the sub-pixels 131 in the plurality of pixel units 13 in the second region 12. That is, turning on one or two sub-pixels 131 in each pixel unit 13 in the second region 12, and not turning on the remaining sub-pixels 131. Figure 9 and Figure 12 In each pixel unit 13, only the green and blue sub-pixels 131 are turned on, and the red sub-pixel 131 is not turned on.

[0107] In the above embodiment, the partially turned-on sub-pixels 131 of the pixel units 13 in the first region 11 and the partially turned-on sub-pixels 131 of the pixel units 13 in the second region 12 have the same color. For example, if the pixel units 13 in the first region 11 have the green and blue sub-pixels 131 turned on, then the pixel units 13 in the second region 12 also have the green and blue sub-pixels 131 turned on. In this embodiment, the pixel units 13 in the first region 11 are turned off, specifically, the red, green, and blue sub-pixels 131 of each pixel unit 13 in the first region 11 are all turned off.

[0108] Similarly, the method for obtaining the second brightness of all second regions 12 is the same as the method for obtaining the first brightness. The difference is that when obtaining the second brightness of the second region 12, the corresponding multiple pixel units 13 of the second region 12 are turned on, and the multiple pixel units 13 of the first region 11 are turned off. The method for turning the multiple pixel units 13 on or off and the method for measuring the second brightness are the same as in step S2 and are not further described here. Specifically, the second brightness of the second region 12 obtained in this step can be recorded as Lv._B.

[0109] S4: Obtain a difference between the first brightness and the second brightness.

[0110] Specifically, the difference value may be an absolute value of the brightness difference between the first brightness and the second brightness, or a relative value of the brightness difference between the first brightness and the second brightness. The relative value may be a ratio of the absolute value to one of the first brightness and the second brightness. The ratio may be understood as a percentage.

[0111] For example, after obtaining the first brightness Lv._A and the second brightness Lv._B in the above steps, the difference between the first brightness and the second brightness can be obtained directly by subtracting the second brightness Lv._B from the first brightness Lv._A. It can be understood that the absolute value of the brightness difference (denoted as X) between the first brightness Lv._A and the second brightness Lv._B is obtained by this method. The relative value of the brightness difference X between the first brightness Lv._A and the second brightness Lv._B can be obtained by the following method: the absolute value of the brightness difference X is obtained by subtracting the second brightness Lv._B from the first brightness Lv._A, and then the absolute value is divided by the absolute value to obtain Lv._A or Lv._B, and multiplied by 100% to obtain the relative value of the brightness difference X between the first brightness and the second brightness, that is, the ratio of the absolute value to one of the first brightness and the second brightness. That is, the relative value of the brightness difference X between the first brightness and the second brightness can be expressed by the following formula (1):

[0112]

[0113] S5 : In response to the difference being less than or equal to the preset brightness threshold, the brightness of the pixel units 13 in the first area 11 or the second area 12 is not adjusted.

[0114] Specifically, the preset brightness threshold can be obtained based on the grayscale between the current color depth (bit value) of the display panel 100 and the color depth of the display panel 100 with an adjacent color depth. In response to the difference being less than or equal to the preset brightness threshold, the brightness difference between the first brightness and the second brightness is small, and the eye can hardly perceive the brightness difference between different display areas 10 of the display panel 100. In other words, the eye cannot perceive problems such as bright and dark lines or unevenness in the image of the display panel 100. Therefore, it can be determined that there are no such display problems and the image display is qualified. Therefore, there is no need to adjust the brightness of the pixel units 13 in the first area 11 or the second area 12.

[0115] S6 : In response to the difference being greater than the preset brightness threshold, adjusting the brightness of the pixel unit 13 with the smaller brightness in the first area 11 and the second area 12 .

[0116] Specifically, in response to the difference being greater than a preset brightness threshold, the brightness difference between the first brightness and the second brightness is large, and the difference in brightness between different display areas 10 of the display panel 100 is clearly visible to the eye. This means that the display panel 100 may have bright and dark lines, uneven images, and other issues. Therefore, it can be determined that the aforementioned display issues exist and the image is unsatisfactory. Therefore, it is necessary to adjust the brightness of the pixel cells 13 in the first area 11 or the second area 12. For example, the brightness of the pixel cells 13 in the first area 11 or the second area 12 can be adjusted to a range that satisfies the display requirements by adjusting the common voltage Vcom or performing Line OD intensity adjustment. For example, the brightness of the pixel cells 13 in the first area 11 can be brightened, or the brightness of the pixel cells 13 in the second area 12 can be dimmed. In this embodiment, the brightness of the pixel cells 13 with lower brightness in the first area 11 and the second area 12 is specifically brightened.

[0117] The brightness detection, comparison, judgment and adjustment process of the first area 11 and the second area 12 in the above steps S1 to S6 can be referred to Figure 22 The flowchart of the method for adjusting the brightness of the display panel is shown.

[0118] In one embodiment, the method may further include: repeating all the above steps at different grayscales; wherein, at different grayscales, the preset brightness thresholds are different. For example, an 8-bit display panel 100 sets a preset brightness threshold (denoted as y) for each grayscale of 0 to 255, and sets a corresponding preset brightness threshold y for each grayscale to compare with the difference between the first brightness and the second brightness. When there are many grayscales, the preset brightness thresholds y of adjacent grayscales may be the same. Figure 19The table shown in FIG. 1 shows each preset brightness threshold value y corresponding to the grayscale of 0 to 255. At the same time, under the grayscale of 0 to 255, the preset brightness threshold value y corresponding to each grayscale can be expressed as follows: Figure 20 The graph shown.

[0119] In a specific embodiment provided in the present application, the display panel 100 is an 8-bit panel.

[0120] like Figure 21 As shown, it is a gamma 2.2 brightness curve diagram of the 9-bit display panel 100.

[0121] For example, the brightness difference X between the first area 11 (bright area) and the second area 12 (dark area) at 32 grayscale on an 8-bit panel should be smaller than the preset brightness threshold y between grayscale 64 and grayscale 65 on a 9-bit panel. The preset brightness threshold y can be obtained as follows:

[0122]

[0123] For example, the brightness difference X between the bright and dark areas of the 64-grayscale 8-bit panel should be smaller than the preset brightness threshold y between the 128-grayscale and 129-grayscale 9-bit panel. The preset brightness threshold y can be obtained as follows:

[0124]

[0125] That is, the preset brightness threshold y of the 8-bit panel at grayscale n is the brightness difference between the 9-bit panel at grayscale 2n and the adjacent grayscale 2n+1, which can be expressed by the following formula:

[0126]

[0127] The method for adjusting the brightness of the display panel 100 of the present application is described below with reference to a specific embodiment.

[0128] Example 1:

[0129] Make sure that the screen with bad bright and dark lines is a normal grayscale (RGB is turned on at the same time) screen, and the bad phenomenon is arranged in a regular pattern. Figures 2 to 5 As shown, Figure 2 For a normal display image, the brightness of each pixel unit 13 is displayed uniformly without bright or dark lines. Figure 3 The bright and dark lines appear in the display screen due to cost reduction or driving, where the brightness of each column of pixel units 13 should be consistent. The pixel units 13 in the 1st, 3rd, 5th, 7th...nth columns are bright, and the pixel units 13 in the 2nd, 4th, 6th, 8th / ...n+1th columns are dark.

[0130] like Figure 4As shown, the 1st, 3rd, 5th, 7th...nth bright area columns of pixel units 13 are turned on, and the 2nd, 4th, 6th, 8th / ...n+1th dark area columns of pixel units 13 are turned off. Figure 3 The first area 11 (bright area) corresponds to Figure 2 The first area 11 (bright area) of FIG.

[0131] like Figure 5 As shown, the 1st, 3rd, 5th, 7th...nth bright area columns of pixel units 13 are turned off, and the 2nd, 4th, 6th, 8th / ...n+1th dark area columns of pixel units 13 are turned on. Figure 4 The second region 12 (dark area) corresponds to Figure 2 The second region 12 (dark region) is shown.

[0132] The brightness of the bright area and the dark area is measured separately by a high-precision optical measuring instrument, and the brightness of the bright area is subtracted from the brightness of the dark area, so as to obtain the brightness difference between the bright area and the dark area.

[0133] Example 2:

[0134] like Figures 6 to 9 As shown, some sub-pixels 131 of the pixel units 13 of the multiple first regions 11 and the multiple second regions 12 are turned on, and the display area 10 is divided into alternating multiple first regions 11 and multiple second regions 12 along the row direction. Other contents are similar to those in the first embodiment and will not be repeated here.

[0135] Example 3:

[0136] like Figures 10 to 12 As shown, some sub-pixels 131 of the pixel units 13 of the multiple first regions 11 and the multiple second regions 12 are turned on, and the display area 10 is divided into alternating multiple first regions 11 and multiple second regions 12 along the column direction. Other contents are similar to those in the first embodiment and are not repeated here.

[0137] Example 4:

[0138] like Figures 13 to 15 As shown, a grayscale light and dark line with one oblique line bright and one oblique line dark shows poor performance. Figure 2 , Figure 2 For a normal display image, the brightness of each pixel unit 13 is displayed uniformly without bright or dark lines. Figure 13 The pixel units 13 are displayed in an inconsistent bright and dark line image due to cost reduction or driving mode. The pixel units 13 in the 1st / 3rd / 5th...nth oblique rows are bright, and the pixel units 13 in the 2nd / 4th / 6th...n+1th oblique rows are dark.

[0139] like Figure 14 As shown, the 1st / 3rd / 5th...nth bright area oblique pixel units 13 are turned on, and the 2nd / 4th / 6th...n+1th dark area oblique pixel units 13 are turned off.

[0140] like Figure 15 As shown, the 1st / 3rd / 5th...nth bright area oblique pixel units 13 are turned off, and the 2nd / 4th / 6th...n+1th dark area oblique pixel units 13 are turned on.

[0141] The bright area is used as the first area 11 and the dark area is used as the second area 12. The brightness of the bright area and the dark area are measured respectively by a high-precision optical measuring instrument, and the brightness of the bright area is subtracted from the brightness of the dark area to obtain the brightness difference between the bright area and the dark area.

[0142] In order to solve the above problems, the present application also provides a device 200 for adjusting the brightness of a display panel.

[0143] See also Figure 23 , Figure 23 This is a schematic diagram of module connections of a device for adjusting the brightness of a display panel provided in this application.

[0144] The device 200 for adjusting the brightness of a display panel provided in the present application may include: a division module 210, a collection module 220, a control module 250, a comparison module 230, and a brightness adjustment module 240. The division module 210 is configured to divide the display area 10 into a plurality of first areas 11 and a plurality of second areas 12 that periodically alternate. The collection module 220 is configured to obtain the first brightness of all first areas 11 and the second brightness of all second areas 12. The control module 250 is configured to control the pixel units 13 of the plurality of first areas 11 to turn on, the pixel units 13 of the plurality of second areas 12 to turn off, and control the collection module 220 to collect the first brightness of all first areas 11; and control the pixel units 13 of the plurality of second areas 12 to turn on, the pixel units 13 of the plurality of first areas 11 to turn off, and control the collection module 220 to collect the second brightness of all second areas 12.

[0145] The comparison module 230 is used to obtain the difference between the first brightness and the second brightness. The brightness adjustment module 240 is used to, in response to the difference being less than or equal to a preset brightness threshold, not adjust the brightness of the pixel unit 13 in the first region 11 or the second region 12; and in response to the difference being greater than the preset brightness threshold, adjust the brightness of the pixel unit 13 with the smaller brightness in the first region 11 and the second region 12. It can be understood that the control module 250 is electrically connected to the division module 210, the acquisition module 220, the comparison module 230, and the brightness adjustment module 240 to obtain information from the corresponding modules or issue control instructions to the corresponding modules. The one with the smaller brightness in the first region 11 and the second region 12 is the one with the darker brightness, and the control module 250 controls the brightness adjustment module 240 to brighten the one with the darker brightness in the first region 11 and the second region 12.

[0146] The specific working methods of each module in the above-mentioned division module 210, acquisition module 220, control module 250, comparison module 230 and brightness adjustment module 240 can be referred to the content of the above-mentioned method for adjusting the brightness of the display panel, which will not be repeated here.

[0147] In order to solve the above problems, the present application also provides a display device 300.

[0148] See also Figure 24 , Figure 24 1 is a schematic diagram of module connections of a display device provided in one embodiment of the present application.

[0149] The display device 300 provided herein may include: a display panel 100 and a driving circuit 320. The display panel 100 is identical to the display panel 100 described above and will not be described in detail here. The driving circuit 320 stores gamma correction data 321, which can be used to adjust and optimize the brightness distribution of the pixel units 13 of the display panel 100, thereby making the display brightness of different areas of the display panel 100 more uniform. The gamma correction data 321 is obtained according to the method for adjusting the brightness of the display panel described above.

[0150] Specifically, gamma correction is a nonlinear brightness adjustment technology used to compensate for the nonlinear characteristics of the brightness response curve of the display device 300 and the visual perception. Gamma correction adjusts the brightness mapping of the input signal to make the display effect more consistent with the visual perception of the eye.

[0151] Combination of gamma correction and bit value of display panel 100:

[0152] Grayscale distribution: Gamma correction adjusts the brightness distribution of grayscale, so that more grayscale is used for dark details (the eye is more sensitive to dark areas) and fewer grayscale is used for bright details. This distribution is particularly important in low-bit value (such as 6-bit or 8-bit) display panels 100, because the limited grayscale requires gamma correction to optimize brightness and color transitions.

[0153] Advantages of high bit value: In a display panel 100 with a high bit value (such as 10 bits), there are more grayscales, and the gamma correction effect is more refined, which can better restore the brightness and color details of the image and reduce color discontinuity.

[0154] Gamma correction can be implemented as follows: Gamma correction is typically implemented using a lookup table (LUT), the accuracy of which is typically 2 bits higher than the input signal. For example, for a 10-bit input, the LUT output may be 12 bits to ensure correction accuracy. Generally speaking, gamma correction optimizes the brightness distribution of grayscales, allowing the bit value of the display panel 100 to be more effectively used for brightness and color expression.

[0155] In order to solve the above problems, the present application also provides another display device 300 .

[0156] See also Figure 25 , Figure 25 This is a schematic diagram of module connections of a display device provided in another embodiment of the present application.

[0157] The display device 300 provided herein may include a display panel 100 and a driving circuit 320. The display panel 100 is identical to the aforementioned display panel 100 and will not be further described here. The driving circuit 320 is configured to drive the display panel 100 to display an image. The image displayed by the display panel 100 includes a plurality of first regions 11 and a plurality of second regions 12 that periodically alternate. For details regarding the plurality of first regions 11 and the plurality of second regions 12, please refer to the aforementioned description.

[0158] In this embodiment, the brightness difference between the first area 11 and the second area 12 is less than or equal to 0.4%, so that the first areas 11 and the second areas 12 of the display screen can all reach the preset brightness. Figure 19 The table shows each preset brightness threshold corresponding to grayscales 0 to 255. At grayscales 244 to 255, the corresponding preset brightness thresholds are all 0.4%. At grayscales 1 to 243, the preset brightness thresholds gradually decrease. For example, the preset brightness threshold corresponding to grayscale 1 is 59.0%, and the preset brightness threshold corresponding to grayscale 243 is 0.5%. The preset brightness thresholds between grayscales 1 to 243 show an overall decreasing trend between 59.0% and 0.5%.

[0159] For example, the following combination Figure 18For explanation. When DRD (Dual-Rate Driving) driving technology is applied to the liquid crystal display panel 100, it mainly reduces the number of display driver chips (DDIC) by increasing the driving speed, thereby reducing costs and simplifying the design. When DRD driving technology is applied to the 8-bit liquid crystal display panel 100, the problem of uneven display of the picture under different grayscales can be improved by increasing the driving speed. DRD technology doubles the driving speed, which means that one source driver IC can complete the work of two source driver ICs. For example, under the traditional driving method, one source driver IC needs to drive 3,072 sub-pixels 131 (taking 1024x600 resolution as an example), while under DRD technology, only one source driver IC with 1,536 channels is required, and each channel can drive two sub-pixels 131.

[0160] For example, in an 8-bit display panel 100, DRD technology can be used to drive pixel cells 13 through left-right split-screen scanning. The display driver IC outputs multiple clock signals, first scanning the first row of pixel cells 13 from left to right, then scanning the second row of pixel cells 13 from right to left, and so on, until the last row of pixel cells 13 in the display panel 100 is fully charged. At this point, the thin-film transistors 42 of all pixel cells 13 are turned off, and the liquid crystal molecules 31 are gradually deflected into position, thereby improving the uneven display problem and achieving a stable image display.

[0161] The present application discloses a device, method, and display device for adjusting the brightness of a display panel, and a method for adjusting the brightness of a display panel, comprising: dividing a display area into a plurality of first areas and a plurality of second areas that alternate periodically; turning on the pixel units of the plurality of first areas, turning off the pixel units of the plurality of second areas, and obtaining a first brightness of all the first areas; turning on the pixel units of the plurality of second areas, turning off the pixel units of the plurality of first areas, and obtaining a second brightness of all the second areas; obtaining a difference between the first brightness and the second brightness; in response to the difference being less than or equal to a preset brightness threshold, not adjusting the brightness of the pixel units in the first area or the second area; in response to the difference being greater than the preset brightness threshold, adjusting the brightness of the pixel unit with the smaller brightness in the first area or the second area. The present application obtains the brightness difference between different areas of the display panel and compares the difference with the preset brightness threshold to determine whether the corresponding display area needs to be adjusted, and adjusts the brightness of the pixel unit with the smaller brightness in the display area based on the comparison result. The method is simple to operate, accurately determines the brightness of different areas of the display panel, and can effectively improve the problem of uneven display images and enhance the display effect.

[0162] The above description is only an implementation method of the present application and does not limit the patent scope of the present application. Any equivalent structure or equivalent process transformation made using the contents of the description and drawings of this application, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present application.

Claims

1. A method for adjusting the brightness of a display panel, characterized in that: include: Dividing the display area into a plurality of first areas and a plurality of second areas that periodically alternate; Turning on a plurality of pixel units in the first area, turning off a plurality of pixel units in the second area, and acquiring a first brightness of all the first areas; Turning on a plurality of pixel units in the second area, turning off a plurality of pixel units in the first area, and acquiring a second brightness of all the second areas; Obtaining a difference between the first brightness and the second brightness; In response to the difference being less than or equal to a preset brightness threshold, not adjusting the brightness of the pixel units in the first area or the second area; In response to the difference being greater than the preset brightness threshold, the brightness of the pixel unit with the smaller brightness in the first area or the second area is adjusted.

2. The method for adjusting the brightness of a display panel according to claim 1, wherein: The method further includes repeating all the above steps at different grayscales; wherein the preset brightness threshold is different at different grayscales.

3. The method for adjusting the brightness of a display panel according to claim 2, wherein: The display panel is an 8-bit panel; the preset brightness threshold of the 8-bit panel at grayscale n is the brightness difference between the 9-bit panel at grayscale 2n and the adjacent grayscale 2n+1.

4. The method for adjusting the brightness of a display panel according to claim 1, wherein: The display area is provided with a plurality of rows and columns of pixel units arranged in a matrix; The method of dividing the display area into a plurality of first areas and a plurality of second areas that are periodically alternated comprises: Along a row direction, the display area is divided into a plurality of alternating first areas and a plurality of second areas; each of the first area and the second area includes a column of pixel units; wherein a is an integer greater than or equal to 1 and less than or equal to 10; or Dividing the display area into a plurality of alternating first areas and a plurality of second areas along a column direction; each of the first area and the second area includes a row of pixel units; wherein a is an integer greater than or equal to 1 and less than or equal to 10; or Along the oblique direction, the display area is divided into a plurality of alternating first areas and a plurality of second areas; the first area and the second area each include a columns or a rows of pixel units; wherein a is an integer greater than or equal to 1 and less than or equal to 10.

5. The method for adjusting the brightness of a display panel according to claim 4, wherein: The method further includes: taking a as all integers less than or equal to N, and repeating all the above steps; wherein N is an integer greater than 1 and less than or equal to 10.

6. The method for adjusting the brightness of a display panel according to claim 1, wherein: The display area is provided with a plurality of rows and columns of pixel units arranged in a matrix; The method of dividing the display area into a plurality of first areas and a plurality of second areas that are periodically alternated comprises: enabling pixel units in the display area to display images; magnifying a local area of the display area using an optical microscope; Acquire the brightness of each pixel unit in the magnified area by an optical detection device; The brightness periodic arrangement rule of the pixel units in the amplified area is analyzed, and the bright area of the display area is used as the first area, and the dark area is used as the second area.

7. The method for adjusting the brightness of a display panel according to claim 1, wherein: The turning on the plurality of pixel units in the first area includes: turning on all sub-pixels of the plurality of pixel units in the first area; the turning on the plurality of pixel units in the second area includes: turning on all sub-pixels of the plurality of pixel units in the second area; or The step of turning on the plurality of pixel units in the first area includes: turning on some sub-pixels of the plurality of pixel units in the first area; the step of turning on the plurality of pixel units in the second area includes: turning on some sub-pixels of the plurality of pixel units in the second area; wherein the turned-on sub-pixels of the pixel units in the first area have the same color as the turned-on sub-pixels of the pixel units in the second area.

8. A device for adjusting the brightness of a display panel, characterized in that: include: a dividing module, configured to divide a display area into a plurality of first areas and a plurality of second areas that are periodically alternated; an acquisition module, configured to acquire a first brightness of all the first areas, and acquire a second brightness of all the second areas; a control module, configured to control the plurality of pixel units in the first area to be turned on, the plurality of pixel units in the second area to be turned off, and control the acquisition module to acquire the first brightness of all the first areas; and controlling the plurality of pixel units in the second area to be turned on and the plurality of pixel units in the first area to be turned off, and controlling the acquisition module to acquire the second brightness of all the second areas; a comparison module, configured to obtain a difference between the first brightness and the second brightness; a brightness adjustment module, configured to, in response to the difference being less than or equal to a preset brightness threshold, not adjust the brightness of the pixel units in the first area or the second area; In response to the difference being greater than the preset brightness threshold, the brightness of the pixel unit with the smaller brightness in the first area or the second area is adjusted.

9. A display device, characterized in that: include: Display panel; a driving circuit storing gamma correction data; The gamma correction data is obtained according to the method for adjusting the brightness of a display panel according to any one of claims 1 to 7.

10. A display device, characterized in that: include: Display panel; A driving circuit, used for driving the display panel to display an image; The display screen of the display panel includes a plurality of first areas and a plurality of second areas that alternate periodically; and a brightness difference between the first areas and the second areas is less than or equal to 0.4%.

Images