WO2023142057A1 - 亮度调节方法、亮度调节装置及显示装置 - Google Patents
亮度调节方法、亮度调节装置及显示装置 Download PDFInfo
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
- G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
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- G—PHYSICS
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- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G5/00—Control arrangements or circuits for visual indicators common to cathode-ray tube indicators and other visual indicators
- G09G5/10—Intensity circuits
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- the invention relates to the field of display technology, in particular to a brightness adjustment method, a brightness adjustment device and a display device.
- the sensitivity of the human eye to changes in the brightness of the display screen is related to the brightness of the screen, and the human eye is most sensitive to changes in the brightness of the screen when the screen brightness is low.
- the liquid crystal display is digitally driven, that is, the brightness of the display screen is divided into several gray scale numbers.
- a Gamma voltage is introduced.
- Gamma data can be preset in the display device, and when brightness adjustment is performed, partition adjustment can be performed according to the stored Gamma data.
- Embodiments of the present disclosure provide a brightness adjustment method, a brightness adjustment device and a display device, which can make the screen brightness uniform and effectively solve the afterimage problem caused by insufficient charging or uneven charging.
- An embodiment of the present disclosure provides a brightness adjustment method, including:
- the current display picture is divided into M first regions, the difference between the common voltage V com of different first regions is greater than the first threshold, and M is greater than 1 an integer of
- the current display screen is divided into N second regions, the difference between the pixel voltage V pixel in different second regions is greater than the second threshold, and N is greater than 1 an integer of
- the display module is driven to display.
- the common voltage compensation value ⁇ V m of the mth first region is calculated by the following formula (1):
- V p is the average value of the common voltage V com of the M first regions
- V m is the value of the common voltage V com of the m first region.
- the pixel voltage compensation value ⁇ V n of the nth second region is calculated by the following formula (II):
- V p ' is the average value of the pixel voltage V pixel of the N second regions
- V n is the value of the pixel voltage V pixel of the nth second region.
- the method before dividing the current display screen into M first regions according to the distribution state of the common voltage V com in the current display screen, the method further includes:
- the correspondence table including the correspondence between ambient light brightness and voltage compensation values
- the voltage distribution state of the common voltage V com and the pixel electrode V pixel in the current display screen is determined.
- the method further includes the step of obtaining the corresponding relationship table between the predetermined corresponding relationship tables in the query, which specifically includes:
- the detection test displays the ambient light brightness at different positions of the screen, specifically including:
- photosensitive sensors are arranged in the peripheral 1st row sub-area, L-th row sub-area, 1st column sub-area and D-th column sub-area to obtain different positions of the test display screen ambient light brightness;
- the detection of ambient light brightness at different positions of the current display screen specifically includes:
- An embodiment of the present disclosure also provides a brightness adjustment device, including:
- the first partition module is used to partition the current display screen into M first areas according to the distribution state of the common voltage V com in the current display screen, and the difference between the common voltage V com in different first areas is greater than the first area A threshold, M is an integer greater than 1;
- the second partition module is used to partition the current display screen into N second regions according to the distribution state of the pixel voltage V pixel in the current display screen, and the difference between the pixel voltage V pixel in different second regions is greater than the first Two thresholds, N is an integer greater than 1;
- a first calculation module configured to calculate voltage compensation values in each of the first regions, wherein the voltage compensation value of the mth first region is ⁇ V m , where m is an integer between 1 and M;
- the second calculation module is used to calculate the voltage compensation value in each of the second regions, wherein the voltage compensation value of the nth second region is ⁇ V n , and n is an integer between 1 and N;
- a third partitioning module configured to overlap M first regions and N second regions to obtain M ⁇ N adjustment regions
- the third calculation module is used to calculate the Gamma voltage values of each of the adjustment areas at different gray scales, so as to obtain a set of Gamma data for M ⁇ N adjustment areas, wherein the mth first area is The Gamma voltage value of the adjustment area obtained by overlapping with the nth second area is V+ ⁇ V m + ⁇ V n , where V is the gray scale voltage under the current gray scale;
- the driving module is used to drive the display module to display according to the Gamma data.
- the first calculation module specifically calculates the common voltage compensation value ⁇ V m of the mth first region according to the following formula (I):
- V p is the average value of the common voltage V com of the M first regions
- V m is the value of the common voltage V com of the m first region.
- the second calculation module is specifically configured to calculate and obtain the pixel voltage compensation value ⁇ V n of the nth second region according to the following formula (II):
- V p ' is the average value of the pixel voltage V pixel of the N second regions
- V n is the value of the pixel voltage V pixel of the nth second region.
- the brightness adjustment device further includes:
- a photosensitive sensor used to detect the ambient light brightness at different positions of the current display screen
- a query module configured to query a prestored correspondence table to determine voltage compensation values at different positions, the correspondence table including the correspondence between ambient light brightness and voltage compensation values;
- the determination module is used to determine the voltage distribution state of the common voltage V com and the pixel electrode V pixel in the current display screen according to the relationship between the voltage compensation values of different positions on the current display screen and the corresponding positions.
- the brightness adjustment device further includes: an acquisition module, configured to acquire the correspondence table, and the acquisition module specifically includes:
- the receiving unit is used to test the ambient light brightness at different positions of the display screen
- the first calculation unit is used to calculate the average value of ambient light brightness of the test display screen as a brightness standard
- the second calculation unit calculates the difference between the ambient light brightness at different positions in the test display screen and the brightness standard
- the data processing unit is configured to determine the voltage compensation value corresponding to each ambient light brightness according to the difference value, so as to obtain the corresponding relationship table.
- the photosensitive sensor is integrated on the display module, and the display screen of the display module is divided into a plurality of sub-regions arranged in an array according to L rows and D columns, and both L and D are greater than or equal to 1 A positive integer; the photosensitive sensor is arranged in the first row sub-region, the L row sub-region, the first column sub-region and the D-th column sub-region located in the periphery of the plurality of sub-regions arranged in an array.
- An embodiment of the present disclosure also provides a display device, including the above-mentioned brightness adjustment device.
- the brightness adjustment method, brightness adjustment device, and display device provided by the embodiments of the present disclosure perform analog Gamma partition adjustment through the overlapping partition method, that is, combining the changes of the common voltage V com in different regions and the pixel voltage V pixel in different regions in the display screen
- analog Gamma value the brightness of different areas of the display screen is uniform, and the adjustment range is relatively large, which can more effectively solve the problems caused by uneven charging and insufficient charging. afterimage problem.
- Fig. 1 shows some schematic diagrams showing the voltage distribution state of the common voltage V com in the module, wherein the solid line represents the voltage equipotential line of V com ;
- Fig. 2 shows some schematic diagrams showing the voltage distribution state of the pixel voltage V pixel in some display modules, wherein the solid line represents the voltage equipotential line of V pixel ;
- Fig. 3 shows a schematic diagram of partitions in the brightness adjustment method in some embodiments of the present disclosure
- Fig. 4 shows the layout diagram of the photosensitive sensor of the small-sized display module in some embodiments
- Fig. 5 shows the layout diagram of the photosensitive sensor of the display module of small and medium size in some embodiments
- FIG. 6 shows a layout diagram of photosensitive sensors of a medium-sized display module in some embodiments
- Fig. 7 shows the photosensor layout diagram of the large-size display module in some embodiments
- FIG. 8 is a schematic flowchart of a brightness adjustment method provided by an embodiment of the present disclosure.
- Gamma data can be preset in the display device, and when brightness adjustment is performed, partition adjustment can be performed according to the stored Gamma data.
- the partition method used for Gamma adjustment is Digital Gamma (digital control circuit) partition, which has a relatively weak effect on the brightness adjustment of the display screen.
- image sticking image sticking is also called image sticking.
- V pixel pixel voltage
- V com common voltage
- the embodiments of the present disclosure provide a brightness adjustment method, a brightness adjustment device, and a display device, which can make the brightness of different areas more uniform, and the adjustment range is relatively large, which can more effectively solve problems caused by insufficient charging and uneven charging. Afterimage problem.
- the inventors found through research that, for the display module, the variation of the common voltage V com and the variation of the pixel voltage V pixel on the display screen are different.
- FIG. 1 shows some schematic diagrams showing the voltage distribution state of the common voltage V com in the module (that is, the voltage change of the common voltage V com ), wherein the solid line represents the voltage equipotential line of the V com .
- FIG. 2 shows a schematic diagram reflecting the voltage distribution state of the pixel voltage V pixel (that is, the voltage change of the common voltage V com ) in some display modules, wherein the solid line represents the voltage equipotential line of the V pixel .
- the voltage distribution generally tends to be closer to the center, and the value of V com deviates from the target value.
- the solid line division reflects the inconsistent division of the V pixel charging effect, and the voltage distribution roughly changes gradually from the near end to the far end of the display module. Therefore, the variation of the common voltage V com and the variation of the pixel voltage V pixel will cause Gamma deviation in different regions.
- the inventor adopted a Gamma partition method with overlapping partitions to improve the uniformity of brightness in different regions and make the adjustable range relatively large, which can effectively solve the problem of uneven brightness and improve afterimage phenomenon.
- the brightness adjustment method provided by the embodiment of the present disclosure includes the following steps:
- Step S01 According to the distribution state of the common voltage V com in the current display picture, the current display picture is divided into M first areas, and the difference between the common voltage V com in different first areas is greater than the first threshold value, M is an integer greater than 1;
- Step S02 According to the distribution state of the pixel voltage V pixel in the current display screen, the current display screen is divided into N second regions, and the difference between the pixel voltage V pixel in different second regions is greater than the second threshold, N is an integer greater than 1;
- Step S03 calculating the common voltage compensation value in each of the first regions, wherein the common voltage compensation value of the mth first region is ⁇ V m , where m is an integer between 1 and M;
- Step S04 calculating pixel voltage compensation values in each of the second regions, wherein the pixel voltage compensation value of the nth second region is ⁇ V n , where n is an integer between 1 and N;
- Step S05 overlapping M first regions and N second regions to obtain M ⁇ N adjustment regions
- Step S06 Calculating the Gamma voltage values of each of the adjustment regions at different gray scales to obtain a set of Gamma data for M ⁇ N adjustment regions, wherein the mth first region and the nth The Gamma voltage value of the adjustment area obtained by overlapping the two second areas is V+ ⁇ V m + ⁇ V n , where V is the gray scale voltage under the current gray scale;
- Step S07 drive the display module to display according to the Gamma data.
- the Digital Gamma partition method used in the related technology is changed, and the partition method of overlapping partitions is adopted, that is, the voltage change of the common voltage and the charging change of the pixel voltage are combined, and the two kinds of change regions are overlapped together.
- the Gamma partition is adjusted, so that the uniformity of brightness can be improved, and the adjustable range is relatively larger, which can effectively solve the problem of uneven brightness, and then effectively solve the afterimage problem caused by insufficient charging and uneven charging.
- step S01 the order of the step of dividing the common voltage V com in step S01 and the step of dividing the pixel voltage V pixel in step S02 can be interchanged and is not limited.
- step S03 and step S04 can be interchanged.
- the distribution state of the common voltage V com refers to the change state of the common voltage V com , and M first regions are divided according to the change of the common voltage V com .
- the common voltages V com in the areas are approximately equal or the difference is within a certain range, and the difference between the common voltages V com in different first areas is larger than the first threshold.
- the first threshold may be predetermined based on experience or the like.
- M may be equal to 4, so the display screen is divided into four first areas from the center outward, namely, area A, area B, area C, and area D.
- area A area A
- area B area B
- area C area D
- area D area D
- the number of partitions in the first area can be adjusted according to the change data of the common voltage V com of the specific product according to the above partition principle.
- the above is just an example. It is not limited to this.
- the voltage equipotential lines are regularly divided from the center to the outside when the division is based on the change of the common voltage V com , but this is only a schematic representation, for different display products , in practical applications, the voltage equipotential lines are not necessarily arranged according to this rule when partitioning according to the change of the common voltage V com , for example, the widths of different first regions are not necessarily equal, or the same first region is not necessarily related to the display
- the center of the screen is symmetrical, or the voltage equipotential line is not necessarily a straight line, but can also be a diagonal line or an irregular line.
- the distribution state of the pixel voltage V pixel refers to the charging change of the pixel voltage V pixel , and N second regions are divided according to the change of the pixel voltage V pixel .
- the division principle can be as follows: The pixel voltages V pixel are approximately equal or the difference is within a certain range, and the difference between the pixel voltages V pixel between different first regions is larger than the second threshold.
- the second threshold may be predetermined based on experience or the like.
- N may be equal to 4, and the display screen is divided into four first areas sequentially from the near end to the far end, that is, area 1, area 2, area 3 and area 4.
- the number of partitions in the second area can be adjusted according to the change data of the pixel voltage V pixel of the specific product according to the above partition principle.
- the above is just an example. It is not limited to this.
- the voltage equipotential lines are more regularly partitioned from the near end to the far end when partitioning according to the charge change of the pixel voltage V pixel .
- the voltage equipotential lines are not necessarily arranged according to this rule when partitioning according to the charging change of the pixel voltage V pixel .
- different second regions The widths are not necessarily equal, or the voltage equipotential lines are not necessarily straight lines but can also be oblique lines or irregular lines, etc.
- the change data of V com and the pixel voltage V pixel are adjusted according to the above division principle.
- step S05 after overlapping M first areas and N second areas, M ⁇ N adjustment areas can be obtained, and these adjustment areas are numbered: A1, B1, C1, D1, A2, B2, C2, D2, ... mn ... MN.
- step S06 when calculating the Gamma voltage values of each adjustment area under different gray scales, the Gamma voltage value of each adjustment area under different gray scales is equal to the gray scale voltage under the current gray scale, the first gray scale voltage of the adjustment area.
- the Gamma voltage is adjusted in each adjustment area, and the common voltage V com is divided into four first areas A, B, C, and D, and divided into 1, 2, and 1 according to the pixel voltage. 3, 4 four second areas, 16 adjustment areas are obtained after overlapping.
- area A1 first determine the V com voltage compensation value ⁇ V A in area A, and then determine the charge attenuation degree ⁇ V s of V pixel in area 1, then the simulated Gamma value of area A1 at GL255 is V 255 + ⁇ V A + ⁇ V s , the simulated Gamma value at GL0 is V 0 + ⁇ V A + ⁇ V s .
- step S03 for each first region, the common voltage compensation value ⁇ V m of the m-th first region is calculated by the following formula (I):
- V p is the average value of the common voltage V com of the M first regions
- V m is the value of the common voltage V com of the m first region.
- step S04 the pixel voltage compensation value ⁇ V n of the nth second region is calculated by the following formula (II):
- V p ' is the average value of the pixel voltage V pixel of the N second regions
- V n is the value of the pixel voltage V pixel of the nth second region.
- ⁇ V A VA -V p
- the difference ⁇ V A is the common voltage compensation value of area A.
- the other three areas B, C, and D are analogized to obtain ⁇ V A , ⁇ V B , ⁇ V C , and ⁇ V D .
- ⁇ V 1 V 1 ⁇ V p ′
- the difference ⁇ V 1 is the pixel voltage compensation value in area 1.
- the method for obtaining the pixel voltage compensation value and the common voltage compensation value in each adjustment area is not limited thereto.
- the existing partition compensation is to perform table look-up compensation according to the RGB gray value of the input picture, which is based on a theoretical value, and most of them are digital compensation.
- the effect is not obvious, because there is uneven charging, and V com deviates in some areas, resulting in uneven brightness.
- the actual brightness situation can be detected by the photosensitive sensor, and the voltage compensation can be performed more accurately according to the actual brightness value fed back by the photosensitive sensor, so as to solve the charging problem.
- Unevenness, afterimage problem, any environment can ensure that the brightness of the display is uniform.
- step S01 the following steps are further included:
- the correspondence table includes the correspondence relation between ambient light brightness and voltage compensation value
- the detection of ambient light is integrated into the Gamma adjustment of the display module, especially for large-size display products, which can adaptively adjust the brightness according to the environmental conditions, and combine the partition compensation to balance the brightness of the entire screen in the process of adaptively adjusting the brightness .
- the ambient light is detected by the photosensitive sensor, and the current ambient light brightness of each area and the difference between each area are calculated; when the voltage drop in each area causes uneven brightness, the corresponding relationship table can be queried to determine the voltage compensation data, and The voltage distribution state of the common voltage V com and the pixel electrode V pixel is determined according to the voltage compensation data. That is to say, according to the actual brightness value fed back by the photosensitive sensor, the voltage compensation is performed more accurately.
- the method may also include the step of obtaining a corresponding relationship table.
- the step of obtaining the corresponding relationship table may be performed in the display product testing stage. Specifically include:
- the above scheme can report the ambient light brightness according to the function of the photosensitive sensor, calculate the average brightness as the brightness standard, and calculate the brightness difference of each area to perform look-up table compensation to guide the screen brightness, and then call the look-up table according to the voltage compensation algorithm Perform voltage compensation.
- a photosensitive sensor is used to detect ambient light brightness, and the photosensitive sensor needs to detect ambient light brightness in both the testing phase and the gamma adjustment phase.
- the photosensitive sensor can be integrated on the display module. In order to prevent the photosensitive sensor from affecting the display, the photosensitive sensor cannot be distributed in the center of the display module during application. Therefore, an embodiment of the present disclosure also provides specific steps for detecting ambient light brightness by a photosensitive sensor, and the steps are as follows:
- the testing stage divide the test display picture into a plurality of sub-regions arranged in an array according to L rows and D columns, and both L and D are positive integers greater than or equal to 1; in the plurality of sub-regions arranged in an array Photosensitive sensors are arranged in the 1st row subarea, the L row subarea, the 1st column subarea and the D column subarea located in the periphery, to obtain the ambient light brightness at different positions of the test display screen.
- the Gamma adjustment stage divide the current display picture into a plurality of sub-regions arranged in an array according to L rows and D columns, and both L and D are positive integers greater than or equal to 1; in the plurality of sub-regions arranged in an array Photosensitive sensors are arranged in the sub-area of the first row, the sub-area of the L-th row, the sub-area of the first column and the sub-area of the D-th column located in the periphery of the area, so as to obtain the ambient light brightness of different positions of the current display screen.
- the main function of ambient light detection in the test phase is to obtain the corresponding relationship table (LUT) according to the test result (brightness value), and the corresponding relationship table includes the relationship between the ambient light brightness value and the voltage compensation value. That is, the correspondence table gives different brightness difference values corresponding to voltage compensation values that need to be compensated.
- the small-sized display module shown in Figure 4 it can only be divided into two sub-areas 1 and 2, and a photosensitive sensor is arranged in each sub-area; for the small- and medium-sized display module shown in Figure 5 In other words, it can only be divided into four sub-regions 1, 2, 3 and 4, and each sub-region is provided with a photosensitive sensor; for the medium-sized display module shown in Figure 6, it can be divided into 4 rows and 4 columns.
- photosensitive sensors are only arranged in the peripheral sub-area (that is, the sub-area shown by 1 to 12 in the figure), and inside; for the large-size display module shown in Figure 7, it can be divided into 11 rows
- photosensitive sensors are arranged only in the peripheral sub-areas (that is, the sub-areas indicated by numbers 1 to 32 in the figure).
- an embodiment of the present disclosure also provides a brightness adjustment device, including:
- the first partition module is used to partition the current display screen into M first areas according to the distribution state of the common voltage V com in the current display screen, and the difference between the common voltage V com in different first areas is greater than the first area A threshold, M is an integer greater than 1;
- the second partition module is used to partition the current display screen into N second regions according to the distribution state of the pixel voltage V pixel in the current display screen, and the difference between the pixel voltage V pixel in different second regions is greater than the first Two thresholds, N is an integer greater than 1;
- a first calculation module configured to calculate voltage compensation values in each of the first regions, wherein the voltage compensation value of the mth first region is ⁇ V m , where m is an integer between 1 and M;
- the second calculation module is used to calculate the voltage compensation value in each of the second regions, wherein the voltage compensation value of the nth second region is ⁇ V n , and n is an integer between 1 and N;
- a third partitioning module configured to overlap M first regions and N second regions to obtain M ⁇ N adjustment regions
- the third calculation module is used to calculate the Gamma voltage values of each of the adjustment areas at different gray scales, so as to obtain a set of Gamma data for M ⁇ N adjustment areas, wherein the mth first area is The Gamma voltage value of the adjustment area obtained by overlapping with the nth second area is V+ ⁇ V m + ⁇ V n , where V is the gray scale voltage under the current gray scale;
- the driving module is used to drive the display module to display according to the Gamma data.
- the brightness adjustment device further includes:
- a photosensitive sensor used to detect the ambient light brightness at different positions of the current display screen
- a query module configured to query a prestored correspondence table to determine voltage compensation values at different positions, the correspondence table including the correspondence between ambient light brightness and voltage compensation values;
- the determination module is used to determine the voltage distribution state of the common voltage V com and the pixel electrode V pixel in the current display screen according to the relationship between the voltage compensation values of different positions on the current display screen and the corresponding positions.
- the brightness adjustment device further includes: an acquisition module, configured to acquire the correspondence table, and the acquisition module specifically includes:
- the receiving unit is used to test the ambient light brightness at different positions of the display screen
- the first calculation unit is used to calculate the average value of ambient light brightness of the test display screen as a brightness standard
- the second calculation unit calculates the difference between the ambient light brightness at different positions in the test display screen and the brightness standard
- the data processing unit is configured to determine the voltage compensation value corresponding to each ambient light brightness according to the difference value, so as to obtain the corresponding relationship table.
- the photosensitive sensor is integrated on the display module, and the display screen of the display module is divided into a plurality of sub-regions arranged in an array according to L rows and D columns, and both L and D are greater than or equal to 1 A positive integer; the photosensitive sensor is arranged in the first row sub-region, the L row sub-region, the first column sub-region and the D-th column sub-region located in the periphery of the plurality of sub-regions arranged in an array.
- the first calculation module specifically calculates the common voltage compensation value ⁇ V m of the mth first region according to the following formula (I):
- V p is the average value of the common voltage V com of the M first regions
- V m is the value of the common voltage V com of the m first region.
- the second calculation module is specifically configured to calculate and obtain the pixel voltage compensation value ⁇ V n of the nth second region according to the following formula (II):
- V p ' is the average value of the pixel voltage V pixel of the N second regions
- V n is the value of the pixel voltage V pixel of the nth second region.
- the brightness adjustment device provided by the embodiment of the present disclosure can also bring about corresponding beneficial effects brought by the brightness adjustment method provided by the embodiment of the present disclosure, which will not be repeated here.
- the embodiment of the present disclosure also provides a display device, including the brightness adjustment device provided by the embodiment of the present disclosure.
- the display device provided by the embodiment of the present disclosure can also bring about the beneficial effects brought by the brightness adjustment method provided by the embodiment of the present disclosure, which will not be repeated here.
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Abstract
一种亮度调节方法、亮度调节装置及显示装置，亮度调节方法包括：根据公共电压V com的分布状态分M个第一区域，不同第一区域的公共电压V com之间的差值大于第一阈值（S01）；根据像素电压V pixel的分布状态分N个第二区域，不同第二区域的像素电压V pixel之间的差值大于第二阈值（S02）；计算各个第一区域内的电压补偿值（S03）；计算各个第二区域内的电压补偿值（S04）；将M个第一区域和N个第二区域交叠而得到M×N个调节区域（S05）；计算各个调节区域在不同灰阶下的Gamma电压值，以得到针对M×N个调节区域的一组Gamma数据（S06）；根据Gamma数据驱动显示模组进行显示（S07），能够使画面亮度均匀，有效解决由于充电不足、充电不均产生的残像问题。
Description
本发明涉及显示技术领域，尤其涉及一种亮度调节方法、亮度调节装置及显示装置。
人眼对显示画面亮度变化的敏感度与画面的亮度有关，而且人眼在画面低亮度时对画面亮度的变化表现最为敏感。液晶显示是数字化驱动，即把显示画面的亮度分成了若干个灰阶数。为了实现数字化的灰阶数与人眼感知亮度的变化关系为线性关系，引入Gamma电压。相关技术中，显示装置中可预先设置Gamma数据，在进行亮度调节时，可根据存储的Gamma数据进行分区调节。
当液晶显示器长时间显示同一个画面，再把画面切到下一个画面时，上一个画面会残留在下一个画面中，这种现象就成为残像(残像也称为Image Sticking)。当V
pixel(像素电压)充电不足，V
com(公共电压)充电不均在部分区域偏离而导致亮度不均时，产生残像的问题尤其严重。
发明内容
本公开实施例提供了一种亮度调节方法、亮度调节装置及显示装置，能够使得画面亮度均匀，有效地解决由于充电不足、充电不均产生的残像问题。
本公开实施例所提供的技术方案如下：
本公开实施例提供了一种亮度调节方法，包括：
根据当前显示画面中公共电压V
com的分布状态，将当前显示画面分区为M个第一区域，不同所述第一区域的公共电压V
com之间的差值大于第一阈值，M为大于1的整数；
根据当前显示画面中像素电压V
pixel的分布状态，将当前显示画面分区为N个第二区域，不同所述第二区域的像素电压V
pixel之间的差值大于第二阈值， N为大于1的整数；
计算各个所述第一区域内的电压补偿值，其中第m个所述第一区域的电压补偿值为ΔV
m，m为1至M之间的整数；
计算各个所述第二区域内的电压补偿值，其中第n个所述第二区域的电压补偿值为ΔV
n，n为1至N之间的整数；
将M个所述第一区域和N个所述第二区域交叠而得到M×N个调节区域；
计算各个所述调节区域在不同灰阶下的Gamma电压值，以得到针对M×N个所述调节区域的一组Gamma数据，其中，由第m个所述第一区域和第n个所述第二区域交叠得到的所述调节区域的Gamma电压值为V+ΔV
m+ΔV
n，V为当前灰阶下的灰阶电压；
根据所述Gamma数据，驱动显示模组进行显示。
示例性的，所述方法中，第m个所述第一区域的公共电压补偿值ΔV
m通过以下公式(I)计算得到：
ΔV
m＝V
m-V
p (I)
其中，V
p为M个所述第一区域的公共电压V
com平均值；V
m为第m个所述第一区域的公共电压V
com值。
示例性的，所述方法中，第n个所述第二区域的像素电压补偿值ΔV
n通过以下公式(II)计算得到：
ΔV
n＝V
n-V
p’ (II)
其中，V
p’为N个所述第二区域的像素电压V
pixel平均值，V
n为第n个所述第二区域的像素电压V
pixel值。
示例性的，在所述根据当前显示画面中公共电压V
com的分布状态，将当前显示画面分区为M个第一区域之前，所述方法还包括：
检测当前显示画面不同位置的环境光亮度；
查询预存的对应关系表，以确定不同位置上的电压补偿值，所述对应关系表包括环境光亮度与电压补偿值的对应关系；
根据当前显示画面上不同位置的电压补偿值与对应的位置之间的关系， 确定出所述当前显示画面中公共电压V
com和像素电极V
pixel的电压分布状态。
示例性的，在所述查询预定的所述对应关系表之间，所述方法还包括获取所述对应关系表的步骤，具体包括：
检测测试显示画面不同位置的环境光亮度；
计算所述测试显示画面的环境光亮度平均值作为亮度标准；
计算所述测试显示画面中不同位置上的环境光亮度与所述亮度标准的差值，并根据所述差值确定各环境光亮度所对应的电压补偿值，以得到所述对应关系表。
示例性的，所述检测测试显示画面不同位置的环境光亮度，具体包括：
将所述测试显示画面划分为按照L行D列呈阵列排布的多个子区域，L和D均为大于或等于1的正整数；
在呈阵列排布的所述多个子区域中位于***的第1行子区域、第L行子区域、第1列子区域和第D列子区域内布设感光传感器，以获取所述测试显示画面不同位置的环境光亮度；
和/或
所述检测当前显示画面不同位置的环境光亮度，具体包括：
将所述当前显示画面划分为按照L行D列呈阵列排布的多个子区域，L和D均为大于或等于1的正整数；
在呈阵列排布的所述多个子区域中位于***的第1行子区域、第L行子区域、第1列子区域和第D列子区域内布设感光传感器，以获取所述当前显示画面不同位置的环境光亮度。
本公开实施例还提供了一种亮度调节装置，包括：
第一分区模块，用于根据当前显示画面中公共电压V
com的分布状态，将当前显示画面分区为M个第一区域，不同所述第一区域的公共电压V
com之间的差值大于第一阈值，M为大于1的整数；
第二分区模块，用于根据当前显示画面中像素电压V
pixel的分布状态，将当前显示画面分区为N个第二区域，不同所述第二区域的像素电压V
pixel之间的差值大于第二阈值，N为大于1的整数；
第一计算模块，用于计算各个所述第一区域内的电压补偿值，其中第m个所述第一区域的电压补偿值为ΔV
m，m为1至M之间的整数；
第二计算模块，用于计算各个所述第二区域内的电压补偿值，其中第n个所述第二区域的电压补偿值为ΔV
n，n为1至N之间的整数；
第三分区模块，用于将M个所述第一区域和N个所述第二区域交叠而得到M×N个调节区域；
第三计算模块，用于计算各个所述调节区域在不同灰阶下的Gamma电压值，以得到针对M×N个所述调节区域的一组Gamma数据，其中由第m个所述第一区域和第n个所述第二区域交叠得到的所述调节区域的Gamma电压值为V+ΔV
m+ΔV
n，V为当前灰阶下的灰阶电压；
驱动模块，用于根据所述Gamma数据，驱动显示模组进行显示。
示例性的，所述第一计算模块具体根据以下公式(I)计算得到第m个所述第一区域的公共电压补偿值ΔV
m：
ΔV
m＝V
m-V
p (I)
其中，V
p为M个所述第一区域的公共电压V
com平均值；V
m为第m个所述第一区域的公共电压V
com值。
示例性的，所述第二计算模块具体用于根据以下公式(II)计算得到第n个所述第二区域的像素电压补偿值ΔV
n：
ΔV
n＝V
n-V
p’ (II)
其中，V
p’为N个所述第二区域的像素电压V
pixel平均值，V
n为第n个所述第二区域的像素电压V
pixel值。
示例性的，所述亮度调节装置还包括：
感光传感器，用于检测当前显示画面不同位置的环境光亮度；
查询模块，用于查询预存的对应关系表，以确定不同位置上的电压补偿值，所述对应关系表包括环境光亮度与电压补偿值的对应关系；
确定模块，用于根据当前显示画面上不同位置的电压补偿值与对应的位置之间的关系，确定出所述当前显示画面中公共电压V
com和像素电极V
pixel的电压分布状态。
示例性的，所述亮度调节装置还包括：获取模块，用于获取所述对应关系表，所述获取模块具体包括：
接收单元，用于测试显示画面不同位置的环境光亮度；
第一计算单元，用于计算所述测试显示画面的环境光亮度平均值作为亮度标准；
第二计算单元，计算所述测试显示画面中不同位置上的环境光亮度与所述亮度标准的差值；
数据处理单元，用于根据所述差值确定各环境光亮度所对应的电压补偿值，以得到所述对应关系表。
示例性的，所述感光传感器集成于显示模组上，且所述显示模组的显示画面划分为按照L行D列呈阵列排布的多个子区域，L和D均为大于或等于1的正整数；在呈阵列排布的所述多个子区域中位于***的第1行子区域、第L行子区域、第1列子区域和第D列子区域内布设所述感光传感器。
本公开实施例还提供了一种显示装置，包括如上所述的亮度调节装置。
本公开实施例所带来的有益效果如下：
本公开实施例提供的亮度调节方法、亮度调节装置及显示装置，通过交叠分区法进行模拟Gamma分区调整，即结合显示画面中公共电压V
com在不同区域的变化及像素电压V
pixel在不同区域的充电变化，将这两种变化区域交叠在一起而进行分区，以调节模拟Gamma值，使得显示画面不同区域亮度均匀，调节范围相对较大，可以更有效地解决由于充电不均、不足产生的残像问题。
图1表示一些显示模组中公共电压V
com的电压分布状态的示意图，其中实线代表V
com电压等势线；
图2表示一些显示模组中像素电压V
pixel的电压分布状态的示意图，其中实线代表V
pixel的电压等势线；
图3表示本公开一些实施例中的亮度调节方法中分区示意图；
图4表示一些实施例中的小尺寸的显示模组的感光传感器布设图；
图5表示一些实施例中的中小尺寸的显示模组的感光传感器布设图；
图6表示一些实施例中的中尺寸的显示模组的感光传感器布设图；
图7表示一些实施例中的大尺寸的显示模组的感光传感器布设图；
图8表示本公开实施例提供的亮度调节方法的流程示意图。
为使本公开实施例的目的、技术方案和优点更加清楚，下面将结合本公开实施例的附图，对本公开实施例的技术方案进行清楚、完整地描述。显然，所描述的实施例是本公开的一部分实施例，而不是全部的实施例。基于所描述的本公开的实施例，本领域普通技术人员在无需创造性劳动的前提下所获得的所有其他实施例，都属于本公开保护的范围。
除非另外定义，本公开使用的技术术语或者科学术语应当为本公开所属领域内具有一般技能的人士所理解的通常意义。本公开中使用的“第一”、“第二”以及类似的词语并不表示任何顺序、数量或者重要性，而只是用来区分不同的组成部分。同样，“一个”、“一”或者“该”等类似词语也不表示数量限制，而是表示存在至少一个。“包括”或者“包含”等类似的词语意指出现该词前面的元件或者物件涵盖出现在该词后面列举的元件或者物件及其等同，而不排除其他元件或者物件。“连接”或者“相连”等类似的词语并非限定于物理的或者机械的连接，而是可以包括电性的连接，不管是直接的还是间接的。“上”、“下”、“左”、“右”等仅用于表示相对位置关系，当被描述对象的绝对位置改变后，则该相对位置关系也可能相应地改变。
在对本公开实施例提供的亮度调节方法、亮度调节装置及显示装置进行详细说明之前，有必要对于相关技术进行以下说明：
在相关技术中，显示装置中可预先设置Gamma数据，在进行亮度调节时，可根据存储的Gamma数据进行分区调节。Gamma调节时所采用的分区方式为Digital Gamma(数字控制电路)分区，对于显示画面亮度调节效果相对较弱。当液晶显示器长时间显示同一个画面，再把画面切到下一个画面时，上 一个画面会残留在下一个画面中，这种现象就成为残像(残像也称为Image Sticking)。当V
pixel(像素电压)充电不足，V
com(公共电压)充电不均在部分区域偏离而导致亮度不均时，产生残像的问题尤其严重。
针对上述问题，本公开实施例提供了一种亮度调节方法、亮度调节装置及显示装置，能够使不同区域亮度更加均匀，且调节范围相对较大，可以更有效地解决由于充电不足、充电不均产生的残像问题。
发明人经研究发现，对于显示模组来说，在显示画面上公共电压V
com的变化和像素电压V
pixel的变化表现不同。
图1所示反映了一些显示模组中公共电压V
com的电压分布状态(即公共电压V
com的电压变化)的示意图，其中实线代表V
com电压等势线。图2所示反映了一些显示模组中像素电压V
pixel的电压分布状态(即公共电压V
com的电压变化)的示意图，其中实线代表V
pixel的电压等势线。
如图1所示，对于公共电压V
com来说，其电压分布情况大致呈越趋近于中心，V
com值越偏离目标值。如图2所示，对于像素电压V
pixel来说，实线分区体现了V
pixel充电效果不一致分区情况，电压分布情况大致是从显示模组近端至远端逐渐变化。因此，公共电压V
com的变化与像素电压V
pixel的变化，会导致不同区域Gamma有偏离。
而相关技术中都是Digital Gamma(数字控制电路)分区，分区补偿时根据输入画面的RGB灰度值进行查表补偿。其是根据一个理论值进行补偿，并且是数字补偿，效果不明显，对于显示画面亮度调节效果相对较弱。因为存在充电不均，V
com在部分区域偏离导致亮度不均的问题，产生残像的问题尤其严重。
发明人经过研究，采用了一种交叠分区的Gamma分区方式，来提升不同区域亮度均匀性，且使得可调节范围相对较大，可有效解决亮度不均问题，进而改善残像现象。
如图8所示，本公开实施例提供的亮度调节方法，包括如下步骤：
步骤S01、根据当前显示画面中公共电压V
com的分布状态，将当前显示画面分区为M个第一区域，不同所述第一区域的公共电压V
com之间的差值大 于第一阈值，M为大于1的整数；
步骤S02、根据当前显示画面中像素电压V
pixel的分布状态，将当前显示画面分区为N个第二区域，不同所述第二区域的像素电压V
pixel之间的差值大于第二阈值，N为大于1的整数；
步骤S03、计算各个所述第一区域内的公共电压补偿值，其中第m个所述第一区域的公共电压补偿值为ΔV
m，m为1至M之间的整数；
步骤S04、计算各个所述第二区域内的像素电压补偿值，其中第n个所述第二区域的像素电压补偿值为ΔV
n，n为1至N之间的整数；
步骤S05、将M个所述第一区域和N个所述第二区域交叠而得到M×N个调节区域；
步骤S06、计算各个所述调节区域在不同灰阶下的Gamma电压值，以得到针对M×N个所述调节区域的一组Gamma数据，其中，由第m个所述第一区域和第n个所述第二区域交叠得到的所述调节区域的Gamma电压值为V+ΔV
m+ΔV
n，V为当前灰阶下的灰阶电压；
步骤S07、根据所述Gamma数据，驱动显示模组进行显示。
上述方案中，改变了相关技术中采用的Digital Gamma分区方式，采用了交叠分区的分区方法，即结合了公共电压的电压变化及像素电压的充电变化，将这两种变化区域交叠在一起进行Gamma分区进行调节，这样，可提升亮度均匀性，且可调节范围相对更大，有效地解决亮度不均的问题，进而有效地解决由于充电不足、充电不均产生的残像问题。
需要说明的是，上述步骤S01的公共电压V
com分区步骤、步骤S02的像素电压V
pixel分区步骤的前后顺序可以互换，并不进行限定。步骤S03和步骤S04的前后顺序可以互换。
步骤S01中，公共电压V
com的分布状态，即是指公共电压V
com的变化状态，根据公共电压V
com的变化来划分出M个第一区域，分区的原则可以是：同一所述第一区域内的公共电压V
com近似相等或者差值在一定范围内，不同第一区域之间的公共电压V
com之间差值大于第一阈值。该第一阈值可以是根据经验等预先确定好。
以图3所示的实施例为例，M可以等于4，因此从显示画面中心向外依次分为4个第一区域，即A区、B区、C区和D区。需要说明的是，以上仅是示例，在实际应用中，不同显示产品，第一区域的分区个数可根据具体产品的公共电压V
com的变化数据依据上述分区原则进行调整，以上仅是示例，并不以此为限。
此外，还需要说明的是，图3的示例中，根据公共电压V
com的变化分区时电压等势线是从中心向外规律地分区，但是这仅是一种示意，对于不同显示产品来说，在实际应用中，根据公共电压V
com的变化分区时电压等势线并不一定是按照该规律排列，例如，不同第一区域的宽度不一定相等，或者同一第一区域不一定是关于显示画面中心对称，或者电压等势线不一定是直线还可以是斜线或不规则线等。
步骤S02中，像素电压V
pixel的分布状态，即是指像素电压V
pixel的充电变化，根据像素电压V
pixel的变化来划分出N个第二区域，分区原则可以如下：同一第二区域内的像素电压V
pixel近似相等或者差值在一定范围内，不同第一区域之间的像素电压V
pixel之间差值大于第二阈值。该第二阈值可以是根据经验等预先确定好。
以图所示的实施例为例，N可以等于4，从显示画面近端向远端依次分为4个第一区域，即1区、2区、3区和4区。需要说明的是，以上仅是示例，在实际应用中，不同显示产品，第二区域的分区个数可根据具体产品的像素电压V
pixel的变化数据依据上述分区原则进行调整，以上仅是示例，并不以此为限。
此外，还需要说明的是，图3的示例中，根据像素电压V
pixel的充电变化分区时电压等势线是从近端向远端较为规律地分区。但是这仅是一种示意，对于不同显示产品来说，在实际应用中，根据像素电压V
pixel的充电变化分区时电压等势线并不一定是按照该规律排列，例如，不同第二区域的宽度不一定相等，或者电压等势线不一定是直线还可以是斜线或不规则线等。
此外，需要说明的是，以上示例中M＝N＝4，但是在实际应用中M和N的取值可以相同或不同，第一区域和第二区域的分区个数可根据具体产品的 公共电压V
com和像素电压V
pixel的变化数据依据上述分区原则进行调整。
在步骤S05中，将M个第一区域和N个第二区域交叠后可得到M×N个调节区域，对这些调节区域进行编号：A1、B1、C1、D1、A2、B2、C2、D2、……mn……MN。
仍然以图3所示为例，4个第一区域和4个第二区域交叠后得到16个调节区域，结合图3，这16个分区分别如下表1所示：
表1
这里需要说明的是，如图3所示，当趋近于中心的第一区域和靠近近端的第二区域的覆盖范围较小而无交叠时，实际划分的调节区域的数量可能并不是M×N个，但是从理论上这里可以认为是未交叠出现的调节区域其Gamma电压值和与之邻近的调节区域相同。
例如，仍以表1中的分区结果为例，在实际画面中如图所示，第3区、第4区与第D区之间无交叠，也就是，D3区和D4区未交叠出现，此时可以认为D3区和与之相邻的C3区Gamma电压值相同；D4区和与之相邻的B4区Gamma电压值相同。
在步骤S06中，计算各调节区域在不同灰阶下的Gamma电压值时，每一调节区域在不同灰阶下的Gamma电压值等于当前灰阶下的灰阶电压、该调节区域所在的第一区域的公共电压补偿值、与该调节区域所在的第二区域的像素电压补偿值之和。也就是说，先计算每个第一区域的公共电压补偿值；再根据像素电压充电变化对模拟Gamma值进行初步调整，调整结果再与各第一区域的公共电压补偿值分区拟合，得到应用交叠分区法进行模拟Gamma分区调节的一组新的Gamma值。
以图3所示的实施例为例，每个调节区域进行Gamma电压调节，将公共 电压V
com分为A、B、C、D四个第一区域，并根据像素电压分为1、2、3、4四个第二区域，交叠后得到16个调节区域。以A1区为例，首先确定A区V
com电压补偿值ΔV
A，再确定1区V
pixel的充电衰减程度ΔV
s，则A1区域在GL255时的模拟Gamma值为V
255+ΔV
A+ΔV
s，在GL0时的模拟Gamma值为V
0+ΔV
A+ΔV
s。其他十五个分区以此类推，得到各调节区域的一组模拟Gamma数据。这种方式调节区间相对较大，可以根据新生成的十六对模拟Gamma值对面板进行亮度调节，以此来达到调整亮度均匀的目的。
示例性的，在步骤S03中，针对每一个第一区域，其第m个所述第一区域的公共电压补偿值ΔV
m通过以下公式(I)计算得到：
ΔV
m＝V
m-V
p (I)
其中，V
p为M个所述第一区域的公共电压V
com平均值；V
m为第m个所述第一区域的公共电压V
com值。
示例性的，在步骤S04中，第n个所述第二区域的像素电压补偿值ΔV
n通过以下公式(II)计算得到：
ΔV
n＝V
n-V
p’ (II)
其中，V
p’为N个所述第二区域的像素电压V
pixel平均值，V
n为第n个所述第二区域的像素电压V
pixel值。
以图3所示的实施例为例，可通过A、B、C、D四个区的公共电压V
A、V
B、V
C、V
D计算得到公共电压平均值V
p，即V
p＝(V
A+V
B+V
C+V
D)/4，再计算每个第一区域的差值ΔV
A。以A区为例，ΔV
A＝V
A-V
p，该差值ΔV
A即为A区的公共电压补偿值。其他B、C、D三个区域类推，得到ΔV
A、ΔV
B、ΔV
C、ΔV
D。同样的，对于1、2、3、4四个第二区域来说，可通过计算1、2、3、4四区的像素电压计算得到像素电压平均值V
p’，V
p’＝(V
1+V
2+V
3+V
3)/4再计算每个第二区域的像素电压与像素电压平均值的差值ΔV
s。以1区为例，ΔV
1＝V
1-V
p’，该差值ΔV
1即为1区的像素电压补偿值。
当然可以理解的是，在其他实施例中，获取各调节区域中的像素电压补偿值和公共电压补偿值的方法并不限于此。
在相关技术中，现有的分区补偿是根据输入画面的RGB灰度值进行查表 补偿，其是根据一个理论值进行补偿，并且大都是数字补偿。效果不明显，因为存在充电不均，V
com在部分区域偏离导致亮度不均的问题。
为了进一步地解决该问题，本公开实施例中的亮度调节方法中，可通过感光传感器来检测实际的亮度情况，可以根据感光传感器反馈的实际亮度值，来更加精准的进行电压补偿，从而解决充电不均匀，有残像的问题，任何环境都可以保证显示的亮度是均匀的。
示例性的，所述方法中，在步骤S01之前，还包括如下步骤：
S01’、检测当前显示画面不同位置的环境光亮度；
S02’、查询预存的对应关系表，以确定不同位置上的电压补偿值，所述对应关系表包括环境光亮度与电压补偿值的对应关系；
S03’、根据当前显示画面上不同位置的电压补偿值与对应的位置之间的关系，确定出所述当前显示画面中公共电压V
com和像素电极V
pixel的电压分布状态。
这里需要说明的是，通过电压补偿值与位置对应关系，可反映出公共电压的变化及像素电压的变化。
上述方案中，将环境光的检测融入显示模组的Gamma调节中，尤其是大尺寸显示产品，可根据环境情况自适应调节亮度，在自适应调节亮度的过程中结合平衡整屏亮度的分区补偿。其中，由感光传感器来对环境光进行检测，计算出当前各区环境光亮度以及各区域之间的差值；当各区域出现压降造成亮度不均匀，可查询对应关系表确定电压补偿数据，并根据电压补偿数据来确定出公共电压V
com和像素电极V
pixel的电压分布状态。也就是说，根据感光传感器反馈的实际亮度值，来更加精准的进行电压补偿。
还需要说明的是，上述步骤S01’之前，所述方法还可以包括获取对应关系表的步骤。该获取对应关系表的步骤可以是在显示产品测试阶段进行。具体包括：
S01”、检测测试显示画面不同位置的环境光亮度；
S02”、计算所述测试显示画面的环境光亮度平均值作为亮度标准；
S03”、计算所述测试显示画面中不同位置上的环境光亮度与所述亮度标 准的差值，并根据所述差值确定各环境光亮度所对应的电压补偿值，以得到所述对应关系表。
这样，上述方案，可以根据感光传感器的功能对环境光亮度进行报点，计算亮度平均值作为亮度标准，计算出各区亮度差异进行查表补偿，从而指导屏幕亮度，再根据电压补偿算法调用查找表进行电压补偿。
此外，在一些实施例中，本公开实施例提供的亮度调节方法中，采用感光传感器来检测环境光亮度，感光传感器在测试阶段和gamma调节阶段均需要进行环境光亮度检测。
感光传感器可以是集成在显示模组上。为了避免感光传感器对显示产生影响，感光传感器在应用时，不能分布在显示模组的中心。因此，本公开实施例中还提供了一种感光传感器检测环境光亮度时的具体步骤，步骤如下：
在测试阶段：将所述测试显示画面划分为按照L行D列呈阵列排布的多个子区域，L和D均为大于或等于1的正整数；在呈阵列排布的所述多个子区域中位于***的第1行子区域、第L行子区域、第1列子区域和第D列子区域内布设感光传感器，以获取所述测试显示画面不同位置的环境光亮度。
在Gamma调节阶段：将所述当前显示画面划分为按照L行D列呈阵列排布的多个子区域，L和D均为大于或等于1的正整数；在呈阵列排布的所述多个子区域中位于***的第1行子区域、第L行子区域、第1列子区域和第D列子区域内布设感光传感器，以获取所述当前显示画面不同位置的环境光亮度。
测试阶段通过环境光检测的主要作用是，根据测试结果(亮度值)得到所述对应关系表(LUT)，该对应关系表包括环境光亮度值与电压补偿值之间的关系。也就是，该对应关系表给出不同的亮度差值对应需要补偿的电压补偿值。
需要说明的是，对于子区域的分区个数并没有限制，可根据实际产品的测试数据进行调整。
例如，以图4所示的小尺寸的显示模组而言，可以仅分为1和2两个子区域，每个子区域内设置一个感光传感器；对于图5所示的中小尺寸的显示 模组而言，可以仅分为1、2、3和4四个子区域，每个子区域内设置一个感光传感器；对于图6所示的中尺寸的显示模组而言，可以分为4行4列的子区域，仅在位于***的子区域(即图中1至12标号所示的子区域)中布设感光传感器，内；对于图7所示的大尺寸的显示模组而言，可以分为11行7列的子区域，仅在位于***的子区域(即图中1至32标号所示的子区域)中布设感光传感器。
应当理解的是，以上仅是提供一种环境光检测的示例性实施例，在实际应用中，可不限于此。
此外，本公开实施例中还提供了一种亮度调节装置，包括：
第一分区模块，用于根据当前显示画面中公共电压V
com的分布状态，将当前显示画面分区为M个第一区域，不同所述第一区域的公共电压V
com之间的差值大于第一阈值，M为大于1的整数；
第二分区模块，用于根据当前显示画面中像素电压V
pixel的分布状态，将当前显示画面分区为N个第二区域，不同所述第二区域的像素电压V
pixel之间的差值大于第二阈值，N为大于1的整数；
第一计算模块，用于计算各个所述第一区域内的电压补偿值，其中第m个所述第一区域的电压补偿值为ΔV
m，m为1至M之间的整数；
第二计算模块，用于计算各个所述第二区域内的电压补偿值，其中第n个所述第二区域的电压补偿值为ΔV
n，n为1至N之间的整数；
第三分区模块，用于将M个所述第一区域和N个所述第二区域交叠而得到M×N个调节区域；
第三计算模块，用于计算各个所述调节区域在不同灰阶下的Gamma电压值，以得到针对M×N个所述调节区域的一组Gamma数据，其中由第m个所述第一区域和第n个所述第二区域交叠得到的所述调节区域的Gamma电压值为V+ΔV
m+ΔV
n，V为当前灰阶下的灰阶电压；
驱动模块，用于根据所述Gamma数据，驱动显示模组进行显示。
示例性的，所述亮度调节装置还包括：
感光传感器，用于检测当前显示画面不同位置的环境光亮度；
查询模块，用于查询预存的对应关系表，以确定不同位置上的电压补偿值，所述对应关系表包括环境光亮度与电压补偿值的对应关系；
确定模块，用于根据当前显示画面上不同位置的电压补偿值与对应的位置之间的关系，确定出所述当前显示画面中公共电压V
com和像素电极V
pixel的电压分布状态。
示例性的，所述亮度调节装置还包括：获取模块，用于获取所述对应关系表，所述获取模块具体包括：
接收单元，用于测试显示画面不同位置的环境光亮度；
第一计算单元，用于计算所述测试显示画面的环境光亮度平均值作为亮度标准；
第二计算单元，计算所述测试显示画面中不同位置上的环境光亮度与所述亮度标准的差值；
数据处理单元，用于根据所述差值确定各环境光亮度所对应的电压补偿值，以得到所述对应关系表。
示例性的，所述感光传感器集成于显示模组上，且所述显示模组的显示画面划分为按照L行D列呈阵列排布的多个子区域，L和D均为大于或等于1的正整数；在呈阵列排布的所述多个子区域中位于***的第1行子区域、第L行子区域、第1列子区域和第D列子区域内布设所述感光传感器。
示例性的，所述第一计算模块具体根据以下公式(I)计算得到第m个所述第一区域的公共电压补偿值ΔV
m：
ΔV
m＝V
m-V
p (I)
其中，V
p为M个所述第一区域的公共电压V
com平均值；V
m为第m个所述第一区域的公共电压V
com值。
示例性的，所述第二计算模块具体用于根据以下公式(II)计算得到第n个所述第二区域的像素电压补偿值ΔV
n：
ΔV
n＝V
n-V
p’ (II)
其中，V
p’为N个所述第二区域的像素电压V
pixel平均值，V
n为第n个所述第二区域的像素电压V
pixel值。
显然，本公开实施例提供的亮度调节装置也能够带来本公开实施例所提供的亮度调节方法所带来的相应的有益效果，在此不再赘述。
本公开实施例还提供了一种显示装置，包括本公开实施例提供的亮度调节装置。显然，本公开实施例提供的显示装置也能够带来本公开实施例所提供的亮度调节方法所带来的有益效果，在此不再赘述。
有以下几点需要说明：
(1)本公开实施例附图只涉及到与本公开实施例涉及到的结构，其他结构可参考通常设计。
(2)为了清晰起见，在用于描述本公开的实施例的附图中，层或区域的厚度被放大或缩小，即这些附图并非按照实际的比例绘制。可以理解，当诸如层、膜、区域或基板之类的元件被称作位于另一元件“上”或“下”时，该元件可以“直接”位于另一元件“上”或“下”或者可以存在中间元件。
(3)在不冲突的情况下，本公开的实施例及实施例中的特征可以相互组合以得到新的实施例。
以上，仅为本公开的具体实施方式，但本公开的保护范围并不局限于此，本公开的保护范围应以权利要求的保护范围为准。
Claims (13)
- 一种亮度调节方法，其特征在于，包括：根据当前显示画面中公共电压V com的分布状态，将当前显示画面分区为M个第一区域，不同所述第一区域的公共电压V com之间的差值大于第一阈值，M为大于1的整数；根据当前显示画面中像素电压V pixel的分布状态，将当前显示画面分区为N个第二区域，不同所述第二区域的像素电压V pixel之间的差值大于第二阈值，N为大于1的整数；计算各个所述第一区域内的电压补偿值，其中第m个所述第一区域的电压补偿值为ΔV m，m为1至M之间的整数；计算各个所述第二区域内的电压补偿值，其中第n个所述第二区域的电压补偿值为ΔV n，n为1至N之间的整数；将M个所述第一区域和N个所述第二区域交叠而得到M×N个调节区域；计算各个所述调节区域在不同灰阶下的Gamma电压值，以得到针对M×N个所述调节区域的一组Gamma数据，其中，由第m个所述第一区域和第n个所述第二区域交叠得到的所述调节区域的Gamma电压值为V+ΔV m+ΔV n，V为当前灰阶下的灰阶电压；根据所述Gamma数据，驱动显示模组进行显示。
- 根据权利要求1所述的亮度调节方法，其特征在于，所述方法中，第m个所述第一区域的公共电压补偿值ΔV m通过以下公式(I)计算得到：ΔV m＝V m-V p (I)其中，V p为M个所述第一区域的公共电压V com平均值；V m为第m个所述第一区域的公共电压V com值。
- 根据权利要求1所述的亮度调节方法，其特征在于，所述方法中，第n个所述第二区域的像素电压补偿值ΔV n通过以下公式(II)计算得到：ΔV n＝V n-V p’ (II)其中，V p’为N个所述第二区域的像素电压V pixel平均值，V n为第n个 所述第二区域的像素电压V pixel值。
- 根据权利要求1所述的亮度调节方法，其特征在于，在所述根据当前显示画面中公共电压V com的分布状态，将当前显示画面分区为M个第一区域之前，所述方法还包括：检测当前显示画面不同位置的环境光亮度；查询预存的对应关系表，以确定不同位置上的电压补偿值，所述对应关系表包括环境光亮度与电压补偿值的对应关系；根据当前显示画面上不同位置的电压补偿值与对应的位置之间的关系，确定出所述当前显示画面中公共电压V com和像素电极V pixel的电压分布状态。
- 根据权利要求4所述的亮度调节方法，其特征在于，在所述查询预定的所述对应关系表之间，所述方法还包括获取所述对应关系表的步骤，具体包括：检测测试显示画面不同位置的环境光亮度；计算所述测试显示画面的环境光亮度平均值作为亮度标准；计算所述测试显示画面中不同位置上的环境光亮度与所述亮度标准的差值，并根据所述差值确定各环境光亮度所对应的电压补偿值，以得到所述对应关系表。
- 根据权利要求5所述的亮度调节方法，其特征在于，所述检测测试显示画面不同位置的环境光亮度，具体包括：将所述测试显示画面划分为按照L行D列呈阵列排布的多个子区域，L和D均为大于或等于1的正整数；在呈阵列排布的所述多个子区域中位于***的第1行子区域、第L行子区域、第1列子区域和第D列子区域内布设感光传感器，以获取所述测试显示画面不同位置的环境光亮度；和/或所述检测当前显示画面不同位置的环境光亮度，具体包括：将所述当前显示画面划分为按照L行D列呈阵列排布的多个子区域，L和D均为大于或等于1的正整数；在呈阵列排布的所述多个子区域中位于***的第1行子区域、第L行子 区域、第1列子区域和第D列子区域内布设感光传感器，以获取所述当前显示画面不同位置的环境光亮度。
- 一种亮度调节装置，其特征在于，包括：第一分区模块，用于根据当前显示画面中公共电压V com的分布状态，将当前显示画面分区为M个第一区域，不同所述第一区域的公共电压V com之间的差值大于第一阈值，M为大于1的整数；第二分区模块，用于根据当前显示画面中像素电压V pixel的分布状态，将当前显示画面分区为N个第二区域，不同所述第二区域的像素电压V pixel之间的差值大于第二阈值，N为大于1的整数；第一计算模块，用于计算各个所述第一区域内的电压补偿值，其中第m个所述第一区域的电压补偿值为ΔV m，m为1至M之间的整数；第二计算模块，用于计算各个所述第二区域内的电压补偿值，其中第n个所述第二区域的电压补偿值为ΔV n，n为1至N之间的整数；第三分区模块，用于将M个所述第一区域和N个所述第二区域交叠而得到M×N个调节区域；第三计算模块，用于计算各个所述调节区域在不同灰阶下的Gamma电压值，以得到针对M×N个所述调节区域的一组Gamma数据，其中由第m个所述第一区域和第n个所述第二区域交叠得到的所述调节区域的Gamma电压值为V+ΔV m+ΔV n，V为当前灰阶下的灰阶电压；驱动模块，用于根据所述Gamma数据，驱动显示模组进行显示。
- 根据权利要求7所述的亮度调节装置，其特征在于，所述第一计算模块具体根据以下公式(I)计算得到第m个所述第一区域的公共电压补偿值ΔV m：ΔV m＝V m-V p (I)其中，V p为M个所述第一区域的公共电压V com平均值；V m为第m个所述第一区域的公共电压V com值。
- 根据权利要求7所述的亮度调节装置，其特征在于，所述第二计算模块具体用于根据以下公式(II)计算得到第n个所述第二区域的像素电压补偿值ΔV n：ΔV n＝V n-V p’ (II)其中，V p’为N个所述第二区域的像素电压V pixel平均值，V n为第n个所述第二区域的像素电压V pixel值。
- 根据权利要求7所述的亮度调节装置，其特征在于，所述亮度调节装置还包括：感光传感器，用于检测当前显示画面不同位置的环境光亮度；查询模块，用于查询预存的对应关系表，以确定不同位置上的电压补偿值，所述对应关系表包括环境光亮度与电压补偿值的对应关系；确定模块，用于根据当前显示画面上不同位置的电压补偿值与对应的位置之间的关系，确定出所述当前显示画面中公共电压V com和像素电极V pixel的电压分布状态。
- 根据权利要求10所述的亮度调节装置，其特征在于，所述亮度调节装置还包括：获取模块，用于获取所述对应关系表，所述获取模块具体包括：接收单元，用于测试显示画面不同位置的环境光亮度；第一计算单元，用于计算所述测试显示画面的环境光亮度平均值作为亮度标准；第二计算单元，计算所述测试显示画面中不同位置上的环境光亮度与所述亮度标准的差值；数据处理单元，用于根据所述差值确定各环境光亮度所对应的电压补偿值，以得到所述对应关系表。
- 根据权利要求10所述的亮度调节装置，其特征在于，所述感光传感器集成于显示模组上，且所述显示模组的显示画面划分为按照L行D列呈阵列排布的多个子区域，L和D均为大于或等于1的正整数；在呈阵列排布的所述多个子区域中位于***的第1行子区域、第L行子区域、第1列子区域和第D列子区域内布设所述感光传感器。
- 一种显示装置，其特征在于，包括如权利要求7至12任一项所述的亮度调节装置。
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