CN117746816A - Display control method of display device and display device - Google Patents

Abstract

The invention provides a display control method of a display device and the display device, which obtain the sum of the duty ratio of middle and low gray level information and high gray level information corresponding to each detection area according to gray level distribution information corresponding to a picture to be displayed and division information of the detection area. A pre-compensation region in which compensation is expected to be required is determined from a plurality of detection regions according to the relation between the duty ratio and the first preset duty ratio. The method comprises the steps of selecting a preset area from a pre-compensation area to obtain the duty ratio of middle and low gray scale information corresponding to the preset area as a pre-duty ratio, and determining an area to be compensated which is finally required to be compensated in the pre-compensation area according to the relation between the pre-duty ratio and a second preset duty ratio. The gray scale voltages of the plurality of sub-pixels in the region to be compensated are compensated, and the plurality of sub-pixels in the region to be compensated are controlled to display according to the compensated gray scale voltages, so that the compensation of the mixed picture with low gray scale and high gray scale in the display is realized.

Description

Display control method of display device and display device

Technical Field

The invention relates to the technical field of display, in particular to a display control method of a display device and the display device.

Background

The current local dimming algorithm has the functions of window frame detection, bottom brightness compensation frame detection, checkerboard frame detection and the like, and can achieve better display effect when the display information is a frame with mixed low gray level and high gray level (such as meteor rain, starry sky frame and the like). However, when displaying a picture (such as firework blooming or iron flower) with middle and low gray scales (gray 40+/-20) and high gray scales (not less than gray 245), the picture displays color mottle due to the information of the middle and low gray scales to influence the contrast of the whole picture.

Disclosure of Invention

The embodiment of the invention provides a display control method of a display device and the display device, which can realize detection and compensation of mixed pictures with low gray scale and high gray scale in display.

The embodiment of the invention provides a display control method of a display device, which comprises the following steps: acquiring gray level distribution information corresponding to a picture to be displayed of a display panel, and dividing the picture to be displayed into a plurality of detection areas so as to obtain the sum of the duty ratio of middle and low gray level information and high gray level information corresponding to each detection area according to the gray level distribution information; determining a precompensation region in a plurality of detection regions according to the relation between the corresponding duty ratio of each detection region and a first preset duty ratio; selecting a preset area from the precompensation area to obtain the duty ratio of the medium and low gray scale information corresponding to a plurality of sub-pixels in the preset area as a pre-duty ratio; wherein the preset area comprises the sub-pixels for displaying the high gray scale information; determining a region to be compensated in the pre-compensation region according to the relation between the pre-occupation ratio and a second preset occupation ratio; and compensating the gray scale voltages of the plurality of sub-pixels in the region to be compensated, and controlling the plurality of sub-pixels in the region to be compensated to display according to the compensated gray scale voltages.

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

Optionally, in some embodiments, the step of determining a precompensation region among the plurality of detection regions according to a relationship between the duty cycle corresponding to each detection region and a first preset duty cycle includes: judging whether the duty ratio sum corresponding to each detection area is larger than the first preset duty ratio or not; and when the duty ratio sum is larger than the first preset duty ratio, determining the detection area corresponding to the duty ratio sum as the pre-compensation area.

Optionally, in some embodiments, the first preset duty cycle is equal to 80%.

Optionally, in some embodiments, the step of selecting a preset area in the pre-compensation area to obtain the duty ratio of the middle and low gray scale information corresponding to the plurality of sub-pixels in the preset area, as the pre-duty ratio includes: in the pre-compensation area, the sub-pixels corresponding to the high gray level information are used as centers, and a preset distance is used as a radius, so that the preset area is obtained; wherein the preset distance is equal to the sum of the distribution sizes of the five sub-pixels; and acquiring the duty ratio of the middle and low gray scale information corresponding to the plurality of sub-pixels in the preset area to be used as a pre-duty ratio.

Optionally, in some embodiments, the step of determining the area to be compensated in the pre-compensation area according to the relation between the pre-occupation ratio and the second preset occupation ratio includes: judging whether the pre-occupying ratio is larger than the second preset occupying ratio or not; and when the pre-occupied ratio is larger than the second preset occupied ratio, determining the preset area corresponding to the pre-occupied ratio as the area to be compensated.

Optionally, in some embodiments, the second preset duty cycle is equal to 60%.

Optionally, in some embodiments, before the step of compensating the gray scale voltages of the plurality of sub-pixels located in the area to be compensated, the method includes: and when the display panel displays a preset picture, obtaining display data corresponding to different gray scales, and obtaining a plurality of compensation values corresponding to different gray scales according to the display data, target gamma values corresponding to different gray scales and target white point color coordinates to generate a compensation table.

The step of compensating the gray scale voltages of the plurality of sub-pixels located in the region to be compensated includes: selecting the compensation value corresponding to the initial gray scale in the compensation table according to the initial gray scale corresponding to a plurality of sub-pixels displaying the middle and low gray scale information in the region to be compensated so as to compensate the gray scale voltages of a plurality of sub-pixels displaying the middle and low gray scale information; the brightness corresponding to the display of the sub-pixels displaying the middle and low gray scale information according to the compensated gray scale voltage is smaller than the brightness corresponding to the display of the sub-pixels displaying the middle and low gray scale information according to the voltage corresponding to the initial gray scale.

Optionally, in some embodiments, the target gamma value corresponding to the middle and low gray levels is greater than 2.2.

The embodiment of the invention also provides a display device which comprises a display panel and a control device. The display panel comprises a plurality of sub-pixels, the control device is electrically connected with the display panel, and the control device is configured to execute any one of the display control methods so as to control the display panel to display.

The invention provides a display control method and a display device, which are used for obtaining the sum of the duty ratio of middle and low gray level information and high gray level information corresponding to each detection area according to gray level distribution information corresponding to a picture to be displayed and division information of the detection area. And determining a precompensation region which is expected to need compensation in the plurality of detection regions according to the relation between the corresponding duty ratio of each detection region and the first preset duty ratio. The method comprises the steps of selecting a preset area from a precompensation area, taking the duty ratio of middle and low gray scale information corresponding to a plurality of sub-pixels in the preset area as a preemption ratio, and determining a final area to be compensated in the precompensation area according to the relation between the preemption ratio and a second preset duty ratio. The preset area comprises sub-pixels for displaying high gray scale information. The gray scale voltages of the plurality of sub-pixels in the region to be compensated are compensated, and the plurality of sub-pixels in the region to be compensated are controlled to display according to the compensated gray scale voltages, so that the compensation of the picture with mixed low gray scale and high gray scale in the display is realized.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are needed in the description of the embodiments will be briefly described below, it being obvious that the drawings in the following description are only some embodiments of the present invention, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

FIGS. 1A-1B are flowcharts of a display control method according to an embodiment of the present invention;

fig. 2 is a schematic structural diagram of a display panel according to an embodiment of the present invention;

FIG. 3 is a graph showing gamma values corresponding to different gray levels according to an embodiment of the present invention;

FIG. 4 is a logic diagram of a display control method according to an embodiment of the present invention;

fig. 5 is a schematic structural diagram of a display device according to an embodiment of the present invention.

Detailed Description

The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to fall within the scope of the invention. Furthermore, it should be understood that the detailed description is presented herein for purposes of illustration and description only, and is not intended to limit the invention. In the present invention, unless otherwise indicated, terms of orientation such as "upper" and "lower" are used to generally refer to the upper and lower positions of the device in actual use or operation, and specifically the orientation of the drawing figures; while "inner" and "outer" are for the outline of the device.

Specifically, fig. 1A to 1B are flowcharts of a display control method provided by an embodiment of the present invention, and fig. 2 is a schematic structural diagram of a display panel provided by an embodiment of the present invention, where the embodiment of the present invention provides a display control method of a display device, which is used to control a plurality of sub-pixels Spi of the display panel to realize display. Wherein, spi1 represents a sub-pixel for displaying the high gray scale information; the display device includes a display panel.

Optionally, the display panel is a passive light emitting display panel. The passive light-emitting display panel comprises a liquid crystal display panel.

With continued reference to fig. 1A, the display control method includes:

acquiring gray level distribution information corresponding to a picture to be displayed of a display panel, and dividing the picture to be displayed into a plurality of detection areas to obtain the sum of the duty ratio of middle and low gray level information and high gray level information corresponding to each detection area A1 according to the gray level distribution information;

determining a pre-compensation area A2 in a plurality of detection areas A1 according to the relation between the corresponding duty ratio of each detection area A1 and a first preset duty ratio;

selecting a preset area A3 from the precompensation area A2 to obtain the duty ratio of the middle and low gray scale information corresponding to a plurality of sub-pixels Spi in the preset area A3, wherein the duty ratio is used as a pre-duty ratio; wherein the preset area A3 includes a subpixel Spi1 for displaying the high gray level information;

determining a region A4 to be compensated in the pre-compensation region A2 according to the relation between the pre-occupation ratio and a second preset occupation ratio;

and compensating the gray scale voltages of the plurality of sub-pixels Spi in the area to be compensated A4, and controlling the plurality of sub-pixels Spi in the area to be compensated A4 to display according to the compensated gray scale voltages.

Note that, the sum of the duty ratio of the middle and low gray-scale information and the duty ratio of the high gray-scale information in the detection area A1 is the duty ratio sum corresponding to the detection area A1. Thus, each of the detection areas A1 has a corresponding one of the duty sums.

The duty ratio sum of the middle and low gray level information and the high gray level information corresponding to each detection area A1 is obtained according to the gray level distribution information corresponding to the picture to be displayed and the division information of the detection area A1, so that a precompensation area A2 which is expected to be compensated is determined in a plurality of detection areas A1 according to the relation between the duty ratio sum corresponding to each detection area A1 and the first preset duty ratio, and the determination of whether the precompensation area A2 which is expected to be compensated is arranged in the picture to be displayed is realized, thereby realizing the detection of whether the picture to be displayed is a mixed picture with middle and low gray level and high gray level.

The relation between the pre-occupied ratio corresponding to the preset area A3 in the pre-compensation area A2 and the second preset occupied ratio is obtained, so that the area A4 to be compensated which is finally required to be compensated is determined in the pre-compensation area A2, and the determination of the area A4 to be compensated which is finally required to be compensated in the image to be displayed is realized on the basis of the detection of the image to be displayed which is a mixed image with middle and low gray scales and high gray scales.

On the basis of detecting that the picture to be displayed is a middle-low gray level and high gray level mixed picture and determining the region to be compensated A4, the gray level voltages of a plurality of sub-pixels Spi positioned in the region to be compensated A4 are compensated, and the plurality of sub-pixels Spi in the region to be compensated A4 are controlled to display according to the compensated gray level voltages, so that the picture with middle-low gray level and high gray level mixed is compensated.

The picture in which the middle and low gray levels are mixed with the high gray level is a picture in which the middle and low gray level information and the high gray level information are scattered. For example, in a night-sky firework scene, gray-scale information corresponding to sub-pixels of a firework is displayed as high gray-scale information, gray-scale information corresponding to sub-pixels of the night-sky is information biased to middle and low gray scales, and the firework scene in the night-sky is scattered in the night-sky, so that the corresponding gray-scale information is the high gray-scale information and the middle and bottom gray-scale information in a discrete distribution.

In some embodiments, the pictures mixed with the middle and low gray levels and the high gray levels comprise firework blooming pictures, iron flower pictures and the like.

Optionally, the gray scale value range corresponding to the display panel during display is 0-255.

Optionally, the gray scale value range corresponding to the middle and low gray scale information is 20-60, and the gray scale value corresponding to the high gray scale information is greater than or equal to 245.

Alternatively, the display control method may be performed by a control device electrically connected to the display panel. Wherein the control means may comprise at least one of a timing controller, a microprocessor, a central processing unit, etc.

Optionally, the control device may analyze the gray-scale distribution information corresponding to the frame to be displayed, so as to obtain the sum of the duty ratios corresponding to each detection area A1.

With continued reference to fig. 2, the detection area A1 includes m×n sub-pixels Spi to realize area division of the sub-pixels Spi of the display panel, so as to determine whether the pre-compensation area A2 for which compensation is expected to be required is present in the frame to be displayed and whether the frame to be displayed is a mixed frame with middle-low gray scale and high gray scale by determining a relation between the duty ratio corresponding to each detection area A1 and the first preset duty ratio. Wherein m >1, n >1.

Alternatively, in some embodiments, M may be greater than or equal to M/3 and N may be greater than or equal to N/3 for power and control duration savings. Wherein M represents the number of the sub-pixels Spi included in a pixel row SPL of the display panel, and N represents the number of the sub-pixels Spi included in a pixel column SPC of the display panel.

Alternatively, in some embodiments, m may be greater than or equal to X/3 and n greater than or equal to Y/3. Wherein 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, so as to save computation power and control time. Wherein one of the pixels Pi includes a plurality of the sub-pixels Spi. Optionally, one of the pixels Pi includes a subpixel displaying red, a subpixel displaying green, and a subpixel displaying blue.

Alternatively, the detection area A1 may correspond to a rectangular area including m×n sub-pixels Spi. It is understood that the detection area A1 may also be a circular area, an elliptical area, or the like.

Optionally, in some embodiments, the detection area A1 may include different numbers and distribution ranges of the sub-pixels Spi according to different contents of the to-be-displayed frame, so as to improve detection accuracy of the display frames of different display categories according to characteristics of different middle-low gray scale and high gray scale mixed frames.

Optionally, in some embodiments, to improve the detection accuracy of whether the frame to be displayed is a mixed frame with middle and low gray scales and high gray scales, and improve the compensation accuracy, the operations of acquiring the duty ratio sum corresponding to each detection area A1 and determining the precompensation area A2 may be performed multiple times for the same frame to be displayed, and the operations of acquiring the duty ratio sum corresponding to each detection area A1 and determining the precompensation area A2 may be controlled to be performed multiple times so that the sizes of the detection areas A1 corresponding to the operations are different.

Optionally, the operations of obtaining the duty ratio sum corresponding to each detection area A1 and determining the precompensation area A2 may be performed twice corresponding to the same frame to be displayed, and the operations of obtaining the duty ratio sum corresponding to each detection area A1 and determining the precompensation area A2 may be controlled to be performed twice so that the sizes of the detection areas A1 corresponding to the operations of determining the precompensation area A2 are different.

When the operation of obtaining the duty ratio sum corresponding to each detection area A1 and determining the precompensation area A2 is performed for the first time on the picture to be displayed, that is, the operation of obtaining the duty ratio sum corresponding to each detection area A1 and determining the precompensation area A2 is not performed for the second time when the picture to be displayed is detected to be a middle-low gray level and high gray level mixed picture.

Optionally, the first execution of the to-be-displayed picture obtains the duty ratio sum corresponding to each detection area A1 and determines the area of the detection area A1 corresponding to the operation of the precompensation area A2 as a first area, and the second execution of the to-be-displayed picture obtains the duty ratio sum corresponding to each detection area A1 and determines the area of the detection area A1 corresponding to the operation of the precompensation area A2 as a second area. Wherein the first area is larger than the second area to increase the control speed.

With continued reference to fig. 1B, in order to determine the precompensation area A2 expected to need compensation and detect whether the frame to be displayed is a mixed frame of middle and low gray scales and high gray scales, the step of determining the precompensation area A2 in the plurality of detection areas A1 according to the relationship between the corresponding duty ratio of each detection area A1 and a first preset duty ratio includes:

judging whether the duty ratio sum corresponding to each detection area A1 is larger than the first preset duty ratio or not;

and when the duty ratio sum is larger than the first preset duty ratio, determining the detection area A1 corresponding to the duty ratio sum as the precompensation area A2.

When the duty ratio sum is less than or equal to the first preset duty ratio, the detection area A1 corresponding to the duty ratio sum is determined not to be the precompensation area A2.

Optionally, in some embodiments, the first preset duty cycle is equal to 80%. That is, whether the detection area A1 corresponding to the duty ratio sum is the precompensation area A2 is determined by judging whether the duty ratio sum corresponding to each detection area A1 exceeds 80%. And when judging that the duty ratio sum corresponding to the detection area A1 exceeds 80%, determining the detection area A1 corresponding to the duty ratio sum as the precompensation area A2. When the duty ratio sum is judged not to exceed 80%, it is determined that the detection area A1 corresponding to the duty ratio sum is not the precompensation area A2.

Optionally, in some embodiments, the first preset duty cycle is greater than or equal to 50% to 100%. Wherein the first predetermined duty cycle is equal to 51%, 55%, 60%, 65%, 70%, 75%, 79%, 81%, 85%, 90%, or 95%.

Optionally, in some embodiments, different first preset duty ratios may be set according to different contents of the to-be-displayed picture, so as to implement picture compensation for characteristics of different middle-low gray scale and high gray scale mixed pictures.

Alternatively, the middle and low gray scale information and the high gray scale information are in discrete distribution in the middle and low gray scale and high gray scale mixed picture. Therefore, after the precompensation area A2 is determined, the range corresponding to the preset area A3 is defined according to the positions of the sub-pixels displaying the high gray level information in the precompensation area A2, and then it is determined whether the gray level information of the sub-pixels Spi corresponding to the preset area A3 conforms to the rule that the middle and low gray level information and the high gray level information are in discrete distribution, so as to determine the compensating area which needs to be compensated finally.

Accordingly, referring to fig. 1B, the step of selecting a preset area A3 in the pre-compensation area A2 to obtain the duty ratio of the middle and low gray level information corresponding to the plurality of sub-pixels Spi in the preset area A3 as the duty ratio includes:

in the pre-compensation area A2, the sub-pixels corresponding to the high gray level information are used as centers, and a preset distance is used as a radius to obtain the preset area A3;

and acquiring the duty ratio of the middle and low gray scale information corresponding to the plurality of sub-pixels Spi in the preset area A3 to be used as a pre-duty ratio.

The step of determining the area to be compensated A4 in the pre-compensation area A2 according to the relation between the pre-occupied ratio and the second pre-occupied ratio includes:

judging whether the pre-occupying ratio is larger than the second preset occupying ratio or not;

and when the pre-occupation ratio is larger than the second preset occupation ratio, determining the preset area A3 corresponding to the pre-occupation ratio as the area A4 to be compensated.

And when the pre-occupying ratio is smaller than or equal to the second pre-occupying ratio, determining that the pre-set area A3 corresponding to the pre-occupying ratio is not the area A4 to be compensated.

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

Optionally, the preset area A3 corresponds to a circular area. It is understood that the detection area A1 may also be a rectangular area, an elliptical area, or the like.

Optionally, in some embodiments, different preset distances may be set according to different contents of the to-be-displayed picture, so that the preset area A3 includes different numbers and distribution ranges of the sub-pixels Spi, so as to improve the determination accuracy of the to-be-compensated area A4 corresponding to different display pictures according to different characteristics of the middle-low gray scale and the high gray scale mixed pictures.

Optionally, in some embodiments, the second preset duty cycle is equal to 60%. Namely, whether the preset area A3 corresponding to the pre-duty ratio is the area A4 to be compensated is determined by judging whether the pre-duty ratio exceeds 60 percent. When judging that the pre-occupation ratio exceeds 60%, determining the preset area A3 corresponding to the pre-occupation ratio as the area A4 to be compensated; when the pre-occupation ratio is judged to be less than or equal to more than 60%, the preset area A3 corresponding to the pre-occupation ratio is determined not to be the area A4 to be compensated.

Optionally, in some embodiments, the second preset duty cycle is greater than or equal to 50% to 100%. Wherein the second predetermined duty cycle is equal to 51%, 55%, 59%, 61%, 65%, 70%, 75%, 80%, 85%, 90% or 95%.

Optionally, the compensation data may be stored in advance in the form of a compensation table, so that the compensation of the gray scale voltages of the plurality of sub-pixels Spi in the area A4 to be compensated is achieved by calling the compensation data of the compensation table by the control device.

Accordingly, in some embodiments, before the step of compensating the gray scale voltages of the plurality of sub-pixels Spi located in the area to be compensated A4, the method includes:

and when the display panel displays a preset picture, obtaining display data corresponding to different gray scales, and obtaining a plurality of compensation values corresponding to different gray scales according to the display data, target gamma values corresponding to different gray scales and target white point color coordinates to generate a compensation table.

Optionally, the preset frames include a first preset frame, a second preset frame, a third preset frame and a fourth preset frame. The first preset picture is a red display picture, the second preset picture is a green display picture, the third preset picture is a blue display picture, and the fourth preset picture is a white display picture.

White light can be obtained by mixing red light, green light and blue light in proportion, but the mixing proportion is different, and the corresponding display white performance is different, so that when the compensation table is generated, not only the display data is corrected according to the target gamma values corresponding to different gray scales, but also the display data is corrected based on the target white point color coordinate images of different gray scales, so that the obtained compensation value is applied to the display control method, and a better compensation effect can be realized when the compensation of gray scale voltages of a plurality of sub-pixels Spi in the area A4 to be compensated is realized.

Alternatively, a plurality of compensation values may be obtained by calculating the difference between the display data and the corresponding target gamma value and the target white point color coordinates.

Optionally, the plurality of compensation values of the compensation table include compensation values corresponding to different gray scales.

Optionally, in some embodiments, the compensation value corresponds to a correction made to the display data at different gray levels. Optionally, in some embodiments, the compensation value corresponds to a digital voltage called by the subpixel Spi at different gray levels.

Optionally, in some embodiments, in order to save storage space, when the display panel displays the preset picture, display data corresponding to gray scales of different binding points may be obtained, so as to obtain a plurality of compensation values corresponding to gray scales of different binding points according to the display data corresponding to gray scales of different binding points, the target gamma value and the target white point color coordinate, so as to generate the compensation table. Correspondingly, the compensation value corresponding to the gray level of the unbinding point can be obtained by linear interpolation according to the compensation value corresponding to the gray level of the unbinding point. In some embodiments, the binding point gray level corresponds to a minimum value of the display gray level, a maximum value of the display gray level, and at least one value between the minimum value and the maximum value of the display gray level.

FIG. 3 is a graph showing gamma values corresponding to different gray levels according to an embodiment of the present invention. Wherein L1 represents gamma values corresponding to different gray scales in a conventional compensation (such as checkerboard picture compensation, bottom-bright picture compensation, window picture compensation and the like) method; l2 represents the gamma value corresponding to different gray scales in the method for compensating the middle and low gray scale and high gray scale mixed picture.

Optionally, in some embodiments, the target gamma value corresponding to the middle-low gray level is greater than 2.2, so that the compensation value generated by the compensation table is suitable for implementing the picture compensation of the middle-low gray level and high gray level hybrid pictures, as shown by L2 in fig. 3.

It can be understood that the step of generating the compensation table may be performed in the debugging stage, and the compensation table is stored in the memory, so that the compensation value of the compensation table is directly invoked to implement compensation on the display screen during actual display.

After the compensation table is generated, the compensation table may be used to compensate the initial gray scale voltages of the plurality of sub-pixels Spi in the area to be compensated A4. Namely, the step of compensating the gray scale voltages of the plurality of sub-pixels Spi located in the area A4 to be compensated includes: determining a plurality of sub-pixels Spi displaying the middle and low gray scale information or displaying the high gray scale information in the area to be compensated a sub-pixel Spi to be compensated, and selecting the compensation value corresponding to the initial gray scale of the plurality of sub-pixels Spi to be compensated in the compensation table according to the initial gray scale corresponding to the plurality of sub-pixels Spi to be compensated in the area to be compensated A4 to compensate the gray scale voltage of the corresponding sub-pixel Spi to be compensated.

Alternatively, in some embodiments, the problem of mottled feel of the display screen can be improved by reducing the brightness of the sub-pixels displaying the middle and low gray scale information. Accordingly, referring to fig. 1B, the step of compensating the gray scale voltages of the plurality of sub-pixels Spi located in the area A4 to be compensated includes:

according to the initial gray scale corresponding to the plurality of sub-pixels displaying the middle and low gray scale information in the area to be compensated A4 (i.e. the sub-pixels displaying the middle and low gray scale information are determined as sub-pixels to be compensated), selecting the compensation value corresponding to the initial gray scale in the compensation table so as to compensate the gray scale voltage of the plurality of sub-pixels displaying the middle and low gray scale information. The brightness corresponding to the display of the sub-pixels displaying the middle and low gray scale information according to the compensated gray scale voltage is smaller than the brightness corresponding to the display of the sub-pixels displaying the middle and low gray scale information according to the voltage corresponding to the initial gray scale.

That is, after the compensation is performed on the initial gray-scale voltages (i.e., voltages corresponding to the initial gray-scale voltages) of the plurality of sub-pixels displaying the middle and low gray-scale information in the area to be compensated A4, the brightness of the plurality of sub-pixels displaying the middle and low gray-scale information in the area to be compensated A4 is reduced compared with the brightness of the plurality of sub-pixels displaying the middle and low gray-scale information in the area to be compensated A4 before the improvement (i.e., the plurality of sub-pixels displaying the middle and low gray-scale information in the area to be compensated A4 are displayed according to the initial gray-scale voltages), so that the display contrast is further improved, the portion of the display image in which the display information is high gray-scale is highlighted, and the mottled feeling of the display image is reduced.

Alternatively, in some embodiments, the problem of the mottled feel of the display screen can also be improved by increasing the brightness of the sub-pixels displaying high gray scale information. Therefore, the step of compensating the gray scale voltages of the plurality of sub-pixels located in the area A4 to be compensated includes: according to the initial gray scale corresponding to the plurality of sub-pixels displaying the high gray scale information in the area to be compensated A4 (i.e. the sub-pixels displaying the high gray scale information are determined as sub-pixels to be compensated), selecting the compensation value corresponding to the initial gray scale in the compensation table so as to compensate the gray scale voltage of the plurality of sub-pixels displaying the high gray scale information. The brightness corresponding to the display of the plurality of sub-pixels displaying the high gray scale information according to the compensated gray scale voltage is larger than the brightness corresponding to the display of the plurality of sub-pixels displaying the high gray scale information according to the voltage corresponding to the initial gray scale.

That is, after the compensation is performed on the initial gray-scale voltages (i.e., voltages corresponding to the initial gray-scale voltages) of the plurality of sub-pixels displaying the high gray-scale information in the area to be compensated A4, the brightness of the plurality of sub-pixels displaying the high gray-scale information in the area to be compensated A4 is improved compared with the brightness before improvement (i.e., the plurality of sub-pixels displaying the high gray-scale information in the area to be compensated A4 are displayed according to the initial gray-scale voltages), so that the display contrast is further improved, the portion of the display screen in which the display information is high gray-scale is highlighted, and the mottled feeling of the display screen is reduced.

It can be understood that, because the gray scale range corresponding to the high gray scale includes the highest display gray scale corresponding to the display panel, when the initial gray scale of the sub-pixel displaying the high gray scale information corresponds to the highest display gray scale, the method for compensating the initial gray scale voltage of the sub-pixel displaying the high gray scale information to improve the brightness of the sub-pixel displaying the high gray scale information may be limited. And the method for compensating the initial gray scale voltage of the sub-pixel displaying the middle and low gray scale information to reduce the brightness of the sub-pixel displaying the middle and low gray scale information is not limited.

Alternatively, in some embodiments, the problem of mottled feeling of the display screen may also be improved by increasing the brightness of the sub-pixels displaying the high-gray-scale information, and by superimposing the sub-pixels displaying the low-gray-scale information in such a manner that the brightness of the sub-pixels displaying the medium-low gray-scale information is reduced.

Alternatively, in some embodiments, the gray scale voltage of the sub-pixel to be compensated may be compensated by compensating the pixel voltage of the sub-pixel to be compensated.

Optionally, in some embodiments, to save storage space and compensation complexity, a compensation value may be set corresponding to a certain gray scale range, so that a plurality of sub-pixels to be compensated corresponding to the gray scale range correspondingly apply the same compensation value to realize compensation.

Fig. 4 is a logic diagram of a display control method according to an embodiment of the present invention. And the information input corresponds to providing information data corresponding to the picture to be displayed through a signal source. The signal source is electrically connected with the control device, and is configured to output information data corresponding to the picture to be displayed to the control device, and the control device analyzes the information data to obtain initial gray scale voltages when a plurality of sub-pixels Spi correspondingly display the picture to be displayed.

Optionally, the control device analyzes the information data, and counts brightness information (i.e. brightness statistics) of the to-be-displayed picture, so as to obtain the gray scale distribution information corresponding to the to-be-displayed picture.

Because the passive display panel needs to cooperate with the backlight module to realize display, after the detection of the middle and low gray scale and the high gray scale mixed picture is realized, the backlight driving module correspondingly drives a plurality of light emitting sources to realize backlight mapping according to the brightness requirement required by display.

Optionally, the light emitting source includes at least one of a sub-millimeter light emitting diode, a micro light emitting diode, and the like.

Optionally, the light source includes a sub-millimeter light emitting diode or a micro light emitting diode, so as to realize the partition control of the backlight source by using a local dimming algorithm, thereby further enhancing the contrast ratio of the display panel when displaying the middle-low gray scale and high gray scale mixed pictures and improving the mottled feeling of the display pictures in cooperation with the display control method.

Alternatively, the backlight driving module may control the parameters (i_peak/PWM) of the driving current for driving the backlight source to emit light by using a pulse width modulation method, and the like to control the luminance of the light emitting source. That is, after the backlight processing, the pulse amplitude and the pulse width of the driving current provided to the plurality of light emitting sources of the backlight module can be different.

Optionally, the backlight driving module includes a backlight driving chip and the like.

Optionally, in some embodiments, the control device may further support implementation of detection and compensation functions for checkerboard frames, bottom-bright frames, and window frames. In the logic block diagram shown in fig. 4, the conventional compensation of the frame includes compensation of the checkered frame, the bottom bright frame and the window frame, and the data corresponding to the information output is the data that needs to be output to the plurality of sub-pixels Spi after the initial gray scale voltages of the plurality of sub-pixels Spi are compensated, so as to realize the display. The detection and compensation of the background compensation picture and the picture reverse compensation are corresponding to the detection and compensation of the middle and low gray scale and high gray scale mixed picture in the application.

According to the method and the device, whether the picture to be displayed is a picture with middle-low gray scale and high gray scale is detected, so that when the picture to be displayed is detected to be the picture with middle-low gray scale and high gray scale, the area A4 to be compensated is determined, and the plurality of sub-pixels Spi to be compensated in the area A4 to be compensated are compensated, so that the display problem is improved.

Fig. 5 is a schematic structural diagram of a display device according to an embodiment of the present invention. The embodiment of the invention also provides a display device, which comprises 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 one of the above display control methods to control the display panel 10 to display.

Optionally, the control device 20 includes a controller and a memory electrically connected, where 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.

Optionally, the memory is configured to store a compensation table, and compensation values of the compensation table correspond to different gray scales.

Optionally, the controller includes a timing controller, a central processing unit, a microcontroller, etc., and the memory includes volatile and nonvolatile memories.

The principles and embodiments of the present invention have been described herein with reference to specific examples, the description of which is intended only to assist in understanding the methods of the present invention and the core ideas thereof; meanwhile, as those skilled in the art will have variations in the specific embodiments and application scope in light of the ideas of the present invention, the present description should not be construed as limiting the present invention.

Claims (10)

1. A display control method of a display device, comprising:

acquiring gray level distribution information corresponding to a picture to be displayed of a display panel, and dividing the picture to be displayed into a plurality of detection areas so as to obtain the sum of the duty ratio of middle and low gray level information and high gray level information corresponding to each detection area according to the gray level distribution information;

determining a precompensation region in a plurality of detection regions according to the relation between the corresponding duty ratio of each detection region and a first preset duty ratio;

selecting a preset area from the precompensation area to obtain the duty ratio of the medium and low gray scale information corresponding to a plurality of sub-pixels in the preset area as a pre-duty ratio; wherein the preset area comprises the sub-pixels for displaying the high gray scale information;

determining a region to be compensated in the pre-compensation region according to the relation between the pre-occupation ratio and a second preset occupation ratio;

and compensating the gray scale voltages of the plurality of sub-pixels in the region to be compensated, and controlling the plurality of sub-pixels in the region to be compensated to display according to the compensated gray scale voltages.

2. The display control method according to claim 1, wherein the detection region includes m×n of the sub-pixels;

wherein M is greater than or equal to M/3, N is greater than or equal to N/3, M represents the number of the sub-pixels included in a pixel row in the display panel, and N represents the number of the sub-pixels included in a pixel column in the display panel.

3. The display control method according to claim 1, wherein the step of determining a precompensation region among the plurality of detection regions according to a relationship between the duty ratio corresponding to each of the detection regions and a first predetermined duty ratio, comprises:

judging whether the duty ratio sum corresponding to each detection area is larger than the first preset duty ratio or not;

and when the duty ratio sum is larger than the first preset duty ratio, determining the detection area corresponding to the duty ratio sum as the pre-compensation area.

4. A display control method according to claim 3, wherein the first preset duty ratio is equal to 80%.

5. The display control method according to claim 1, wherein the step of selecting a preset area from the pre-compensation area to obtain the duty ratio of the middle and low gray scale information corresponding to the plurality of sub-pixels in the preset area as the duty ratio includes:

in the pre-compensation area, the sub-pixels corresponding to the high gray level information are used as centers, and a preset distance is used as a radius, so that the preset area is obtained; wherein the preset distance is equal to the sum of the distribution sizes of the five sub-pixels;

and acquiring the duty ratio of the middle and low gray scale information corresponding to the plurality of sub-pixels in the preset area to be used as a pre-duty ratio.

6. The display control method according to claim 1, wherein the step of determining the area to be compensated in the pre-compensation area according to the relation between the pre-occupied ratio and the second pre-occupied ratio includes:

judging whether the pre-occupying ratio is larger than the second preset occupying ratio or not;

and when the pre-occupied ratio is larger than the second preset occupied ratio, determining the preset area corresponding to the pre-occupied ratio as the area to be compensated.

7. A display control method according to claim 3, wherein the second preset duty ratio is equal to 60%.

8. The display control method according to claim 1, wherein before the step of compensating for gray-scale voltages of the plurality of sub-pixels located in the region to be compensated, comprising:

when the display panel displays a preset picture, display data corresponding to different gray scales are obtained, and a plurality of compensation values corresponding to the different gray scales are obtained according to the display data, target gamma values corresponding to the different gray scales and target white point color coordinates so as to generate a compensation table;

the step of compensating the gray scale voltages of the plurality of sub-pixels located in the region to be compensated includes:

selecting the compensation value corresponding to the initial gray scale in the compensation table according to the initial gray scale corresponding to a plurality of sub-pixels displaying the middle and low gray scale information in the region to be compensated so as to compensate the gray scale voltages of a plurality of sub-pixels displaying the middle and low gray scale information; the brightness corresponding to the display of the sub-pixels displaying the middle and low gray scale information according to the compensated gray scale voltage is smaller than the brightness corresponding to the display of the sub-pixels displaying the middle and low gray scale information according to the voltage corresponding to the initial gray scale.

9. The display control method according to claim 8, wherein the target gamma value corresponding to the middle-low gray scale is greater than 2.2.

10. A display device, comprising:

a display panel including a plurality of sub-pixels;

the control device is electrically connected with the display panel and is configured to execute the display control method according to any one of claims 1 to 9 so as to control the display panel to display.