Display control method of display device and display device

Abstract

The application provides a display control method of a display device and the display device. The display control method comprises the following steps: obtaining the proportion of the medium and low gray scale information and the high gray scale information corresponding to each detection area according to the gray scale distribution information corresponding to the to-be-displayed picture and the division information of the detection area; determining a pre-compensation area which is expected to be compensated in the multiple detection areas according to the relationship between the proportion and a first preset proportion; selecting a preset area in the pre-compensation area, taking the proportion of the medium and low gray scale information corresponding to the preset area as a pre-proportion, and determining a to-be-compensated area which needs to be compensated finally in the pre-compensation area according to the relationship between the pre-proportion and a second preset proportion; and compensating the gray scale voltage of multiple sub-pixels located in the to-be-compensated area, and controlling the multiple sub-pixels in the to-be-compensated area to display according to the compensated gray scale voltage, so as to realize the compensation of the mixed picture of the medium and low gray scale and the high gray scale.

Description

Technical Field

[0001] This invention relates to the field of display technology, and more specifically to a display control method and a display device. Background Technology

[0002] Current local dimming algorithms incorporate features such as window detection, background brightness compensation detection, and checkerboard detection, achieving good display results when displaying images with a mixture of low and high grayscale levels (such as meteor showers or starry skies). However, when displaying images with a mixture of low to medium grayscale levels (gray40±20) and high grayscale levels (≥gray245) (such as fireworks or metalwork displays), the display becomes mottled due to the need to show low to medium grayscale information, affecting the overall contrast of the image. Summary of the Invention

[0003] This invention provides a display control method and a display device, which can detect and compensate for mixed low and high grayscale images in the display.

[0004] This invention provides a display control method for a display device, comprising: acquiring grayscale distribution information corresponding to a screen to be displayed on a display panel, and dividing the screen to be displayed into multiple detection areas, so as to obtain the proportion of low-grayscale information and high-grayscale information corresponding to each detection area according to the grayscale distribution information; determining a pre-compensation area among the multiple detection areas according to the relationship between the proportion of each detection area and a first preset proportion; selecting a preset area among the pre-compensation areas to obtain the proportion of low-grayscale information corresponding to multiple sub-pixels within the preset area as a pre-proportion; wherein the preset area includes the sub-pixels displaying the high-grayscale information; determining a compensation area among the pre-compensation areas according to the relationship between the pre-proportion and a second preset proportion; compensating the grayscale voltage of multiple sub-pixels located within the compensation area, and controlling the multiple sub-pixels within the compensation area to display according to the compensated grayscale voltage.

[0005] Optionally, in some embodiments, the detection area includes m×n sub-pixels. Where m is greater than or equal to M / 3, n is greater than or equal to N / 3, M represents the number of sub-pixels included in a pixel row of the display panel, and N represents the number of sub-pixels included in a pixel column of the display panel.

[0006] Optionally, in some embodiments, the step of determining a pre-compensation region among multiple detection regions based on the relationship between the percentage corresponding to each detection region and a first preset percentage includes: determining whether the percentage corresponding to each detection region is greater than the first preset percentage; when the percentage is greater than the first preset percentage, determining the detection region corresponding to the percentage as the pre-compensation region.

[0007] Optionally, in some embodiments, the first preset percentage is equal to 80%.

[0008] Optionally, in some embodiments, the step of selecting a preset area in the pre-compensation area to obtain the proportion of the low-to-medium grayscale information corresponding to multiple sub-pixels within the preset area as a pre-proportion includes: in the pre-compensation area, taking the sub-pixel corresponding to displaying the high-to-medium grayscale information as the center and a preset distance as the radius, to obtain the preset area; wherein the preset distance is equal to the sum of the distribution sizes of the five sub-pixels; and obtaining the proportion of the low-to-medium grayscale information corresponding to multiple sub-pixels within the preset area as a pre-proportion.

[0009] Optionally, in some embodiments, the step of determining the region to be compensated in the pre-compensation region based on the relationship between the pre-proportion and the second preset proportion includes: determining whether the pre-proportion is greater than the second preset proportion; when the pre-proportion is greater than the second preset proportion, determining the preset region corresponding to the pre-proportion as the region to be compensated.

[0010] Optionally, in some embodiments, the second preset percentage is equal to 60%.

[0011] Optionally, in some embodiments, before the step of compensating the grayscale voltage of the multiple sub-pixels located in the compensation area, the method includes: acquiring display data corresponding to different grayscale levels when the display panel displays a preset image, and obtaining multiple compensation values ​​corresponding to different grayscale levels based on the display data, the target gamma value corresponding to different grayscale levels and the target white point color coordinates, so as to generate a compensation table.

[0012] The step of compensating the grayscale voltage of multiple sub-pixels located in the compensation area includes: selecting a compensation value corresponding to the initial grayscale of the multiple sub-pixels displaying the low-to-medium grayscale information in the compensation table according to the initial grayscale of the multiple sub-pixels displaying the low-to-medium grayscale information, so as to compensate the grayscale voltage of the multiple sub-pixels displaying the low-to-medium grayscale information; wherein the brightness corresponding to the multiple sub-pixels displaying the low-to-medium grayscale information when displayed according to the compensated grayscale voltage is less than the brightness corresponding to the multiple sub-pixels displaying the low-to-medium grayscale information when displayed according to the voltage corresponding to the initial grayscale.

[0013] Optionally, in some embodiments, the target gamma value corresponding to the low grayscale is greater than 2.2.

[0014] Embodiments of the present invention also provide a display device, including a display panel and a control device. The display panel includes a plurality of sub-pixels, and the control device is electrically connected to the display panel. The control device is configured to execute any of the above-described display control methods to control the display panel to display.

[0015] This invention provides a display control method and display device. The method obtains the proportion of low-to-medium grayscale information and high-to-medium grayscale information in each detection area based on the grayscale distribution information corresponding to the image to be displayed and the division information of the detection area. By determining the relationship between the proportion of each detection area and a first preset proportion, a pre-compensation area is identified among multiple detection areas. Within the pre-compensation area, a preset area is selected to obtain the proportion of low-to-medium grayscale information corresponding to multiple sub-pixels within the preset area as a pre-proportion. Based on the relationship between the pre-proportion and a second preset proportion, the final area to be compensated is determined within the pre-compensation area. The preset area includes sub-pixels displaying high-to-medium grayscale information. By compensating the grayscale voltage of multiple sub-pixels located within the area to be compensated, and controlling the multiple sub-pixels within the area to be compensated to display according to the compensated grayscale voltage, compensation is achieved for images displaying a mixture of low-to-medium grayscale and high-to-medium grayscale. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0017] Figures 1A-1B This is a flowchart of the display control method provided in an embodiment of the present invention;

[0018] Figure 2 This is a schematic diagram of the structure of the display panel provided in an embodiment of the present invention;

[0019] Figure 3 This is a comparison curve of gamma values ​​corresponding to different gray levels provided in the embodiments of the present invention;

[0020] Figure 4 This is a logic diagram of the display control method provided in an embodiment of the present invention;

[0021] Figure 5 This is a schematic diagram of the structure of the display device provided in an embodiment of the present invention. Detailed Implementation

[0022] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention. Furthermore, it should be understood that the specific embodiments described herein are only for illustration and explanation of the present invention and are not intended to limit the present invention. In the present invention, unless otherwise stated, directional terms such as "upper" and "lower" generally refer to the upper and lower positions of the device in actual use or operation, specifically the drawing directions in the accompanying drawings; while "inner" and "outer" refer to the outline of the device.

[0023] Specifically, Figures 1A-1B This is a flowchart of the display control method provided in an embodiment of the present invention. Figure 2 This is a schematic diagram of the structure of a display panel provided in an embodiment of the present invention. The present invention provides a display control method for a display device, used to control a plurality of sub-pixels Spi of the display panel to achieve display. Wherein, Spi1 represents a sub-pixel displaying the high grayscale information; the display device includes a display panel.

[0024] Optionally, the display panel is a passive light-emitting display panel. The passive light-emitting display panel includes a liquid crystal display panel.

[0025] Please continue reading. Figure 1A The display control method includes:

[0026] Obtain the grayscale distribution information corresponding to the image to be displayed on the display panel, and divide the image to be displayed into multiple detection areas, so as to obtain the proportion of low-grayscale information and high-grayscale information corresponding to each detection area A1 according to the grayscale distribution information;

[0027] Based on the proportion corresponding to each of the detection regions A1 and the relationship with the first preset proportion, a pre-compensation region A2 is determined among the multiple detection regions A1;

[0028] A preset region A3 is selected in the pre-compensation region A2 to obtain the proportion of the low and medium grayscale information corresponding to the multiple sub-pixels Spi in the preset region A3, as a pre-proportion; wherein, the preset region A3 includes the sub-pixel Spi1 that displays the high grayscale information;

[0029] Based on the relationship between the pre-proportion and the second pre-proportion, the area to be compensated, A4, is determined in the pre-compensation area A2;

[0030] The grayscale voltage of the multiple sub-pixels Spi located in the compensation area A4 is compensated, and the multiple sub-pixels Spi in the compensation area A4 are controlled to be displayed according to the compensated grayscale voltage.

[0031] It should be noted that the sum of the proportions of low-to-medium grayscale information and high-to-medium grayscale information in a detection area A1 is the sum of proportions corresponding to that detection area A1. Therefore, each detection area A1 has a corresponding sum of proportions.

[0032] By obtaining the proportion of low-grayscale information and high-grayscale information corresponding to each detection area A1 based on the grayscale distribution information corresponding to the image to be displayed and the division information of the detection area A1, the pre-compensation area A2 expected to be compensated is determined among multiple detection areas A1 according to the relationship between the proportion of each detection area A1 and the first preset proportion, so as to determine whether the image to be displayed has a pre-compensation area A2 expected to be compensated, thereby realizing the detection of whether the image to be displayed is a mixed image of low-grayscale and high-grayscale.

[0033] By obtaining the relationship between the pre-proportion corresponding to the preset region A3 in the pre-compensation region A2 and the second preset proportion, the region A4 that needs to be compensated in the pre-compensation region A2 is determined. Thus, based on the detection that the image to be displayed is a mixed image of low-grayscale and high-grayscale, the region A4 that needs to be compensated in the image to be displayed is determined.

[0034] Based on the detection that the image to be displayed is a mixture of low and high gray levels, and the determination of the compensation area A4, the gray level voltage of multiple sub-pixels Spi located in the compensation area A4 is compensated, and the multiple sub-pixels Spi in the compensation area A4 are controlled to display according to the compensated gray level voltage, so as to achieve compensation for the mixed low and high gray levels in the display.

[0035] It should be noted that a mixed low-to-medium grayscale and high-to-medium grayscale image refers to an image where low-to-medium grayscale information and high-to-medium grayscale information are scattered. For example, in a fireworks scene in the night sky, the grayscale information corresponding to the sub-pixels displaying the fireworks is high-to-medium grayscale information, while the grayscale information corresponding to the sub-pixels displaying the night sky is biased towards low-to-medium grayscale information. Since the fireworks scene in the night sky is composed of fireworks scattered in the night sky, the corresponding grayscale information is a discrete distribution of high-to-medium grayscale information and low-to-medium grayscale information.

[0036] In some embodiments, images with a mixture of low and high grayscale include fireworks displays and iron flower displays.

[0037] Optionally, the grayscale value range corresponding to the display panel is 0 to 255.

[0038] Optionally, the grayscale value range corresponding to the low and medium grayscale information is 20 to 60, and the grayscale value corresponding to the high grayscale information is greater than or equal to 245.

[0039] Optionally, the display control method can be executed by a control device electrically connected to the display panel. The control device may include at least one of a timing controller, a microprocessor, a central processing unit, etc.

[0040] Optionally, the grayscale distribution information corresponding to the screen to be displayed can be analyzed by a control device to obtain the proportion of each detection area A1.

[0041] Please continue reading. Figure 2 The detection area A1 includes m×n sub-pixels Spi, which divide the display panel into multiple sub-pixel Spi regions. This allows for the determination of whether the image to be displayed contains a pre-compensation area A2 that is expected to require compensation, by judging the proportion corresponding to each detection area A1 and its relationship with the first preset proportion. It also enables the detection of whether the image to be displayed is a mixture of low-grayscale and high-grayscale images. Where m>1, n>1.

[0042] Optionally, in some embodiments, to save computing power and control time, m can be greater than or equal to M / 3, and n can be greater than or equal to N / 3. Here, M represents the number of sub-pixels Spinners included in a pixel row SPL of the display panel, and N represents the number of sub-pixels Spinners included in a pixel column SPC of the display panel.

[0043] Optionally, in some embodiments, m can be greater than or equal to X / 3, and n can be greater than or equal to Y / 3. Here, X represents the number of pixels Pi included in a pixel row SPL of the display panel, and Y represents the number of pixels Pi included in a pixel column SPC of the display panel, to save computing power and control time. A pixel Pi includes multiple sub-pixels Spi. Optionally, a pixel Pi includes a sub-pixel displaying red, a sub-pixel displaying green, and a sub-pixel displaying blue.

[0044] Optionally, the detection area A1 can correspond to a rectangular area including m×n sub-pixels Spi. It is understood that the detection area A1 can also correspond to a circular area, an elliptical area, etc.

[0045] Optionally, in some embodiments, the detection area A1 may be configured to include different numbers and distribution ranges of the sub-pixels Spi depending on the content of the screen to be displayed, so as to improve the detection accuracy of display screens of different display categories for the characteristics of different mixed low-grayscale and high-grayscale screens.

[0046] Optionally, in some embodiments, in order to improve the detection accuracy of whether the image to be displayed is a mixed image of low and medium grayscale and high grayscale, and to improve the compensation accuracy, the operation of obtaining the proportion of each detection area A1 and determining the pre-compensation area A2 can be performed multiple times for the same image to be displayed, and the size of the detection area A1 corresponding to the multiple operations of obtaining the proportion of each detection area A1 and determining the pre-compensation area A2 can be controlled to be different.

[0047] Optionally, the operation of obtaining the proportion of each detection area A1 and determining the pre-compensation area A2 can be performed twice for the same display screen, and the size of the detection area A1 corresponding to the two operations of obtaining the proportion of each detection area A1 and determining the pre-compensation area A2 can be controlled to be different.

[0048] Specifically, when the operation of obtaining the proportion of each detection area A1 and determining the pre-compensation area A2 is performed for the first time on the screen to be displayed, that is, when it is detected that the screen to be displayed is a mixed screen of low grayscale and high grayscale, the operation of obtaining the proportion of each detection area A1 and determining the pre-compensation area A2 is no longer performed for the second time.

[0049] Optionally, the area of ​​the detection area A1 corresponding to the first execution of the operation of obtaining the proportion of each detection area A1 and determining the pre-compensation area A2 on the screen to be displayed is the first area, and the area of ​​the detection area A1 corresponding to the second execution of the operation of obtaining the proportion of each detection area A1 and determining the pre-compensation area A2 on the screen to be displayed is the second area. The first area is larger than the second area to improve control speed.

[0050] Please continue reading. Figure 1B To determine the pre-compensation area A2 that is expected to require compensation and to detect whether the image to be displayed is a mixed image of low-grayscale and high-grayscale, the step of determining the pre-compensation area A2 among multiple detection areas A1 based on the proportion corresponding to each detection area A1 and the relationship with a first preset proportion includes:

[0051] Determine whether the sum of the proportions corresponding to each of the detection regions A1 is greater than the first preset proportion;

[0052] When the sum of the percentages is greater than the first preset percentage, the detection area A1 corresponding to the sum of the percentages is determined as the pre-compensation area A2.

[0053] When the sum of the percentages is less than or equal to the first preset percentage, it is determined that the detection area A1 corresponding to the sum of the percentages is not the pre-compensation area A2.

[0054] Optionally, in some embodiments, the first preset percentage is equal to 80%. That is, by determining whether the sum of the percentages corresponding to each detection area A1 exceeds 80%, it is determined whether the detection area A1 corresponding to the sum of the percentages is the pre-compensation area A2. When it is determined that the sum of the percentages corresponding to the detection area A1 exceeds 80%, the detection area A1 corresponding to the sum of the percentages is determined to be the pre-compensation area A2. When it is determined that the sum of the percentages does not exceed 80%, the detection area A1 corresponding to the sum of the percentages is determined not to be the pre-compensation area A2.

[0055] Optionally, in some embodiments, the first preset percentage is greater than or equal to 50% to 100%. Specifically, the first preset percentage is equal to 51%, 55%, 60%, 65%, 70%, 75%, 79%, 81%, 85%, 90%, or 95%.

[0056] Optionally, in some embodiments, different first preset ratios can be set according to the different content of the screen to be displayed, so as to achieve screen compensation for the characteristics of different mixed low-grayscale and high-grayscale screens.

[0057] Optionally, since the low-grayscale and high-grayscale information are discretely distributed in a mixed low-grayscale and high-grayscale image, after the pre-compensation area A2 is determined, the range corresponding to the preset area A3 can be defined based on the position of the sub-pixels displaying the high-grayscale information in the pre-compensation area A2. Then, it can be determined whether the grayscale information of the multiple sub-pixels Spi corresponding to the preset area A3 conforms to the rule that the low-grayscale and high-grayscale information is discretely distributed, so as to determine the compensation area that needs to be compensated in the end.

[0058] Accordingly, please continue reading Figure 1B The step of selecting a preset region A3 in the pre-compensation region A2 to obtain the proportion of the low and medium grayscale information corresponding to multiple sub-pixels Spi within the preset region A3 as a pre-proportion includes:

[0059] In the pre-compensation area A2, the preset area A3 is obtained with the sub-pixel that displays the high grayscale information as the center and a preset distance as the radius.

[0060] Obtain the proportion of the low and medium grayscale information corresponding to the multiple sub-pixels Spi within the preset area A3, as a pre-proportion.

[0061] The step of determining the region to be compensated A4 in the pre-compensation region A2 based on the relationship between the pre-proportion and the second preset proportion includes:

[0062] Determine whether the pre-proportion is greater than the second preset proportion;

[0063] When the pre-proportion is greater than the second preset proportion, the preset region A3 corresponding to the pre-proportion is determined as the region A4 to be compensated.

[0064] When the pre-proportion is less than or equal to the second preset proportion, it is determined that the preset region A3 corresponding to the pre-proportion is not the region A4 to be compensated.

[0065] Optionally, in some embodiments, the preset distance is equal to the sum of the distribution sizes of the five sub-pixels Spi.

[0066] Optionally, the preset area A3 corresponds to a circular area. It is understood that the detection area A1 can also correspond to a rectangular area, an elliptical area, etc.

[0067] Optionally, in some embodiments, different preset distances can be set according to the different content of the screen to be displayed, so that the preset area A3 includes different numbers and distribution ranges of the sub-pixels Spi, in order to improve the determination accuracy of the compensation area A4 corresponding to different display screens, taking into account the characteristics of different mixed low-grayscale and high-grayscale screens.

[0068] Optionally, in some embodiments, the second preset percentage is equal to 60%. That is, by determining whether the preset percentage exceeds 60%, it is determined whether the preset region A3 corresponding to the preset percentage is the region A4 to be compensated. When the preset percentage exceeds 60%, the preset region A3 corresponding to the preset percentage is determined to be the region A4 to be compensated; when the preset percentage is less than or equal to more than 60%, the preset region A3 corresponding to the preset percentage is determined not to be the region A4 to be compensated.

[0069] Optionally, in some embodiments, the second preset percentage is greater than or equal to 50% to 100%. Specifically, the second preset percentage is equal to 51%, 55%, 59%, 61%, 65%, 70%, 75%, 80%, 85%, 90%, or 95%.

[0070] Optionally, compensation data can be stored in advance in the form of a compensation table, so that the compensation data in the compensation table can be called by the control device to realize the compensation of gray level voltage of multiple sub-pixels Spi in the area to be compensated A4.

[0071] Accordingly, in some embodiments, before the step of compensating the grayscale voltage of the plurality of sub-pixels Spi located in the compensation area A4, the following steps are included:

[0072] When the display panel displays a preset image, the display data corresponding to different gray levels is obtained, and multiple compensation values ​​corresponding to different gray levels are obtained based on the display data, the target gamma value corresponding to different gray levels and the target white point color coordinates, so as to generate a compensation table.

[0073] Optionally, the preset screen includes a first preset screen, a second preset screen, a third preset screen, and a fourth preset screen. The first preset screen is displayed in red, the second preset screen is displayed in green, the third preset screen is displayed in blue, and the fourth preset screen is displayed in white.

[0074] White light can be obtained by mixing red, green, and blue light in a certain proportion. However, different mixing proportions result in different white appearances. Therefore, when generating the compensation table, the display data is not only corrected based on the target gamma values ​​corresponding to different gray levels, but also based on the target white point color coordinates of different gray levels. This allows the obtained compensation values ​​to be applied to the display control method, achieving better compensation results when compensating the gray level voltages of multiple sub-pixels Spi within the compensation area A4.

[0075] Optionally, multiple compensation values ​​can be obtained by calculating the difference between the displayed data and the corresponding target gamma value and the target white point color coordinates.

[0076] Optionally, the multiple compensation values ​​in the compensation table include compensation values ​​corresponding to different gray levels.

[0077] Optionally, in some embodiments, the compensation value corresponds to a correction amount made to the display data at different gray levels. Optionally, in some embodiments, the compensation value corresponds to the digital voltage called by the sub-pixel Spi at different gray levels.

[0078] Optionally, in some embodiments, to save storage space, display data corresponding to different bound-point grayscales can be obtained when the display panel displays a preset image. Multiple compensation values ​​for different bound-point grayscales can then be obtained based on the display data, target gamma value, and target white point color coordinates to generate a compensation table. Correspondingly, the compensation value for non-bound-point grayscales can be obtained by linear interpolation based on the compensation value for the corresponding bound-point grayscale. In some embodiments, the bound-point grayscale corresponds to the minimum value of the display grayscale, the maximum value of the display grayscale, and at least one value between the minimum and maximum values ​​of the display grayscale.

[0079] Figure 3 This is a gamma value comparison curve corresponding to different gray levels provided in the embodiments of the present invention. Among them, L1 represents the gamma value corresponding to different gray levels in conventional compensation methods (such as checkerboard image compensation, bottom brightness image compensation, window image compensation, etc.); L2 represents the gamma value corresponding to different gray levels in the method of compensating for mixed low-gray levels and high gray levels.

[0080] Optionally, in some embodiments, the target gamma value corresponding to low and medium gray levels is greater than 2.2, so that the compensation value generated by the compensation table is suitable for achieving image compensation for mixed low and medium gray levels and high gray levels, such as... Figure 3 As shown in L2.

[0081] Understandably, the step of generating the compensation table can be performed during the debugging phase, and the compensation table can be stored in the memory so that the compensation value of the compensation table can be directly called during actual display to achieve compensation of the display screen.

[0082] After generating the compensation table, the initial grayscale voltage of multiple sub-pixels Spi within the compensation area A4 can be compensated using the compensation table. Specifically, the step of compensating the grayscale voltage of multiple sub-pixels Spi located within the compensation area A4 includes: identifying multiple sub-pixels Spi displaying low-to-medium grayscale information or high-to-high grayscale information in the compensation area A4 as sub-pixels Spi to be compensated; and, based on the initial grayscale corresponding to the multiple sub-pixels Spi to be compensated in the compensation area A4, selecting the compensation value corresponding to the initial grayscale of the multiple sub-pixels Spi to be compensated from the compensation table to compensate the grayscale voltage of the corresponding sub-pixels Spi to be compensated.

[0083] Optionally, in some embodiments, the problem of mottled appearance of the displayed image can be improved by reducing the brightness of subpixels with low grayscale information. Accordingly, please continue reading... Figure 1B The step of compensating the grayscale voltage of the plurality of sub-pixels Spi located within the compensation area A4 includes:

[0084] Based on the initial grayscale corresponding to the multiple sub-pixels displaying the low-to-medium grayscale information in the compensation area A4 (that is, the multiple sub-pixels displaying the low-to-medium grayscale information are determined as the sub-pixels to be compensated), a compensation value corresponding to the initial grayscale is selected from the compensation table to compensate the grayscale voltage of the multiple sub-pixels displaying the low-to-medium grayscale information. The brightness corresponding to the multiple sub-pixels displaying the low-to-medium grayscale information when displayed according to the compensated grayscale voltage is less than the brightness corresponding to the multiple sub-pixels displaying the low-to-medium grayscale information when displayed according to the voltage corresponding to the initial grayscale.

[0085] That is, after compensating the initial grayscale voltage (i.e., the voltage corresponding to the initial grayscale) of the multiple sub-pixels displaying the low-to-medium grayscale information in the compensation area A4, the brightness of the multiple sub-pixels displaying the low-to-medium grayscale information in the compensation area A4 is reduced compared to before the improvement (i.e., the multiple sub-pixels displaying the low-to-medium grayscale information in the compensation area A4 are displayed according to the initial grayscale voltage), which further improves the display contrast, highlights the high-grayscale part of the display screen, and reduces the mottled feeling of the display screen.

[0086] Optionally, in some embodiments, the problem of image blurring can be improved by increasing the brightness of the sub-pixels displaying high grayscale information. Therefore, the step of compensating the grayscale voltage of the plurality of sub-pixels located within the compensation area A4 includes: selecting a compensation value corresponding to the initial grayscale in the compensation table based on the initial grayscale corresponding to the plurality of sub-pixels displaying the high grayscale information (i.e., determining the plurality of sub-pixels displaying the high grayscale information as the sub-pixels to be compensated), to compensate the grayscale voltage of the plurality of sub-pixels displaying the high grayscale information. Wherein, the brightness corresponding to the plurality of sub-pixels displaying the high grayscale information when displayed according to the compensated grayscale voltage is greater than the brightness corresponding to the plurality of sub-pixels displaying the high grayscale information when displayed according to the voltage corresponding to the initial grayscale.

[0087] That is, after compensating the initial grayscale voltage (i.e., the voltage corresponding to the initial grayscale) of the multiple sub-pixels displaying the high grayscale information in the compensation area A4, the brightness of the multiple sub-pixels displaying the high grayscale information in the compensation area A4 is improved compared to before the improvement (i.e., the multiple sub-pixels displaying the high grayscale information in the compensation area A4 are displayed according to the initial grayscale voltage), which further improves the display contrast, highlights the part of the display screen where the information is high grayscale, and reduces the mottled feeling of the display screen.

[0088] Understandably, since the grayscale range corresponding to high grayscale includes the highest display grayscale corresponding to the display panel, the method of compensating the initial grayscale voltage of the sub-pixel displaying the high grayscale information to increase its brightness may be limited when the initial grayscale of the sub-pixel displaying the high grayscale information corresponds to the highest display grayscale. However, the method of compensating the initial grayscale voltage of the sub-pixel displaying the medium-low grayscale information to reduce its brightness is not limited.

[0089] Optionally, in some embodiments, the problem of mottled appearance of the displayed image can be improved by increasing the brightness of sub-pixels displaying high grayscale information and simultaneously decreasing the brightness of sub-pixels displaying low grayscale information.

[0090] Optionally, in some embodiments, the grayscale voltage of the sub-pixel to be compensated can be compensated by compensating the pixel voltage of the sub-pixel to be compensated.

[0091] Optionally, in some embodiments, to save storage space and reduce compensation complexity, a compensation value can be set for a certain grayscale range so that multiple sub-pixels to be compensated corresponding to the grayscale range can be compensated by applying the same compensation value.

[0092] Figure 4 This is a logic diagram of the display control method provided in this embodiment of the invention. The information input corresponds to providing information data corresponding to the screen to be displayed via a signal source. The signal source and the control device are electrically connected. The signal source is configured to output the information data corresponding to the screen to be displayed to the control device. The control device analyzes the information data to obtain the initial grayscale voltage of the multiple sub-pixels (Spi) corresponding to the display of the screen to be displayed.

[0093] Optionally, the control device can obtain the grayscale distribution information corresponding to the screen to be displayed by analyzing the information data and statistically analyzing the brightness information of the screen to be displayed (i.e., brightness statistics).

[0094] Since passive display panels need to work with backlight modules to achieve display, after detecting mixed low-grayscale and high-grayscale images, multiple light sources can be driven by the backlight driver module to achieve backlight mapping according to the brightness requirements of the display.

[0095] Optionally, the light source includes at least one of light-emitting diodes such as sub-millimeter light-emitting diodes and micro light-emitting diodes.

[0096] Optionally, the light source includes sub-millimeter light-emitting diodes or micro light-emitting diodes to achieve zoned control of the backlight using a local dimming algorithm. This, in conjunction with the display control method, further enhances the contrast of the display panel when displaying mixed low-grayscale and high-grayscale images, and improves the problem of mottled display images.

[0097] Optionally, the backlight driving module can control the brightness of the light source by controlling the parameters (I_peak / PWM) of the driving current that drives the backlight to emit light through methods such as pulse width modulation (PWM) and pulse amplitude modulation (PWM). That is, after backlight processing, the pulse amplitude and pulse width of the driving current provided to the multiple light sources of the backlight module can be different.

[0098] Optionally, the backlight driving module includes a backlight driving chip, etc.

[0099] Optionally, in some embodiments, the control device may also support detection and compensation functions for checkerboard-patterned images, background-bright images, and window images. Among these, in... Figure 4 In the logic block diagram shown, the conventional image compensation includes compensation for the checkerboard image, the background brightness image, and the window image. The data corresponding to the information output is the data that needs to be output to multiple sub-pixel SPIs after compensating the initial grayscale voltage of multiple sub-pixels to achieve the display. Background compensation image detection and image inverse compensation correspond to the detection and compensation of mixed low-grayscale and high-grayscale images in this application.

[0100] This application detects whether the image to be displayed is a mixture of low and medium gray levels and high gray levels. When the image to be displayed is detected to be a mixture of low and medium gray levels and high gray levels, the application determines the compensation area A4 and compensates multiple compensation sub-pixels Spi of the compensation area A4 to improve the display problem.

[0101] Figure 5 This is a schematic diagram of the structure of a display device provided in an embodiment of the present invention. An embodiment of the present invention also provides a display device, including a display panel 10 and a control device 20. The display panel 10 includes a plurality of sub-pixels (SpI). The control device 20 is electrically connected to the display panel 10, and the control device 20 is configured to execute any of the above-described display control methods to control the display panel 10 to display.

[0102] Optionally, the control device 20 includes a controller and a memory electrically connected together. The memory is configured to store program instructions for implementing the display control method, and the controller is configured to execute the program instructions to control the display panel 10 to display.

[0103] Optionally, the memory is configured to store a compensation table, wherein the compensation values ​​in the compensation table correspond to different gray levels.

[0104] Optionally, the controller includes a timing controller, a central processing unit, a microcontroller, etc., and the memory includes volatile and non-volatile memory.

[0105] This document uses specific examples to illustrate the principles and implementation methods of the present invention. The descriptions of the above embodiments are only for the purpose of helping to understand the method and core ideas of the present invention. At the same time, for those skilled in the art, there will be changes in the specific implementation methods and application scope based on the ideas of the present invention. Therefore, the content of this specification should not be construed as a limitation of the present invention.

Claims

1. A display control method for a display device, characterized in that, include: The grayscale distribution information corresponding to the image to be displayed on the display panel is obtained, and the image to be displayed is divided into multiple detection areas, so as to obtain the proportion of low-grayscale information and high-grayscale information corresponding to each detection area according to the grayscale distribution information. Based on the relationship between the proportion corresponding to each of the detection regions and the first preset proportion, a pre-compensation region is determined among the multiple detection regions; A preset area is selected in the pre-compensation area to obtain the proportion of the low and medium grayscale information corresponding to multiple sub-pixels in the preset area, as a pre-proportion; wherein, the preset area includes the sub-pixels that display the high grayscale information; Based on the relationship between the pre-proportion and the second pre-proportion, the area to be compensated is determined in the pre-compensation area; The grayscale voltage of a plurality of sub-pixels located within the compensation area is compensated, and the plurality of sub-pixels within the compensation area are controlled to display according to the compensated grayscale voltage; Prior to the step of compensating the grayscale voltage of the plurality of sub-pixels located within the compensation area, the following steps are included: When the display panel displays a preset image, the display data corresponding to different gray levels is obtained, and multiple compensation values ​​corresponding to different gray levels are obtained based on the display data, the target gamma value corresponding to different gray levels and the target white point color coordinates, so as to generate a compensation table; The step of compensating the grayscale voltage of the plurality of sub-pixels located within the compensation area includes: Based on the initial grayscale corresponding to the plurality of sub-pixels displaying the medium-low grayscale information in the area to be compensated, a compensation value corresponding to the initial grayscale is selected from the compensation table to compensate the grayscale voltage of the plurality of sub-pixels displaying the medium-low grayscale information; wherein, the brightness corresponding to the plurality of sub-pixels displaying the medium-low grayscale information when displayed according to the compensated grayscale voltage is less than the brightness corresponding to the plurality of sub-pixels displaying the medium-low grayscale information when displayed according to the voltage corresponding to the initial grayscale.

2. The display control method according to claim 1, characterized in that, The detection area includes m×n sub-pixels; Where m is greater than or equal to M / 3, n is greater than or equal to N / 3, M represents the number of sub-pixels included in a pixel row of the display panel, and N represents the number of sub-pixels included in a pixel column of the display panel.

3. The display control method according to claim 1, characterized in that, The step of determining a pre-compensation region among multiple detection regions based on the relationship between the proportion corresponding to each detection region and a first preset proportion includes: Determine whether the sum of the proportions corresponding to each of the detection regions is greater than the first preset proportion; When the sum of the percentages is greater than the first preset percentage, the detection area corresponding to the sum of the percentages is determined as the pre-compensation area.

4. The display control method according to claim 3, characterized in that, The first preset percentage is equal to 80%.

5. The display control method according to claim 1, characterized in that, The step of selecting a preset region in the pre-compensation region to obtain the proportion of the low-to-medium grayscale information corresponding to multiple sub-pixels within the preset region as a pre-proportion includes: In the pre-compensation area, a preset area is obtained with the sub-pixel that displays the high grayscale information as the center and a preset distance as the radius; wherein, the preset distance is equal to the sum of the distribution sizes of the five sub-pixels; Obtain the proportion of the low and medium grayscale information corresponding to multiple sub-pixels within the preset area, as a pre-proportion.

6. The display control method according to claim 1, characterized in that, The step of determining the area to be compensated in the pre-compensation area based on the relationship between the pre-proportion and the second preset proportion includes: Determine whether the pre-proportion is greater than the second preset proportion; When the pre-proportion is greater than the second preset proportion, the preset area corresponding to the pre-proportion is determined as the area to be compensated.

7. The display control method according to claim 3, characterized in that, The second preset percentage is equal to 60%.

8. The display control method according to claim 1, characterized in that, The target gamma value corresponding to the low and medium gray levels is greater than 2.

2.

9. A display device, characterized in that, include: The display panel includes multiple sub-pixels; A control device, electrically connected to the display panel, is configured to execute the display control method as described in any one of claims 1 to 8 to control the display panel to display.

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