A display method combining complementary color frame reduction and partition color adjustment technology

Abstract

The application relates to a display method combining complementary color frame reduction and partition color modulation technology, and belongs to the technical field of display. The method realizes the display white balance principle based on complementary color, mixes any two colors in RGB three primary colors through spatial color mixing, then mixes the third primary color light left to realize white light by using the time color mixing principle, and achieves the display frame reduction purpose; meanwhile, different from the dynamic partition light modulation technology of the traditional direct backlight, each three primary color light source in the partition is respectively color modulated according to the image signal corresponding to the partition, and the modulation of brightness and color is simultaneously realized in each partition. The method can not only realize the partition color modulation of the backlight, but also reduces the high requirement of the original field sequential three sub-frame refreshing mode on the frame rate of the display; the method is an effective way for liquid crystal display to realize super-high resolution, super-high gray scale and brightness.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of display, and particularly relates to a display method combining complementary color frame reduction and partition color adjustment technology. BACKGROUND

[0002] In recent years, digital flat panel display technology represented by liquid crystal display has developed rapidly. This is due to the progress of liquid crystal material technology, the improvement of TFT manufacturing process and the improvement of digital circuit hardware processing speed, which makes the response speed of liquid crystal display faster, and the refresh rate is generally improved from 60Hz to 120Hz or even 240Hz, and the emerging Mini-RGB LED partition color adjustment technology is introduced. These background technologies have jointly promoted the development of LED display technology, and the emergence of three-frame mixed color backlight display technology of partition color adjustment makes it possible to comprehensively realize the requirements of the next generation display for high-definition picture, high refresh rate and HDR performance.

[0003] However, since the emerging partition color adjustment technology requires three-frame mixing, its requirements for the display are three times that of traditional display technology, resulting in very high production cost of partition color adjustment display. At present, the display mass-produced on the market only reaches 120HZ, which cannot meet the basic needs of emerging technology for picture smoothness. And due to the phenomena of saccade and smooth pursuit of human eyes during watching, when there is relative speed between the watched object and eyeball, the multi-field content of this time sequence mixed color display often cannot completely coincide on the retina, that is, color separation phenomenon (Color Breakup) occurs. This phenomenon will cause irregular colored lines to appear on the outline of the object, which seriously affects the display effect of the time sequence mixed color display. Generally, the color separation problem can be alleviated by increasing the refresh rate of the display and adding additional primary color fields, but this will greatly increase the production cost of the display. SUMMARY

[0004] The purpose of the present application is to solve the above technical problems, and to provide a display method combining complementary color frame reduction and partition color adjustment technology. This method not only can realize the partition color adjustment of backlight, but also reduces the high requirements of the original field sequential three sub-frame refresh mode for the frame rate of the display. This method is an effective way for liquid crystal display to realize ultra-high resolution, ultra-high gray scale and brightness.

[0005] To achieve the above purpose, the technical scheme of the present application is: a display method combining complementary color frame reduction and partition color adjustment technology, which realizes the principle of display white balance based on complementary color, mixes any two colors in RGB three primary colors through spatial color mixing technology, and realizes white light by mixing the remaining third primary color light through time color mixing principle, so as to achieve the purpose of display frame reduction.

[0006] In an embodiment of the present application, each of the three primary light sources in each partition is color-modulated according to the image signal corresponding to the partition, and the modulation of brightness and color is simultaneously realized in each partition.

[0007] In an embodiment of the present application, the method is implemented as follows:

[0008] (1) Backlight partitioning: The liquid crystal backlight module is divided into MxN partitions, M and N respectively correspond to the number of partitions in the row and column directions of the liquid crystal pixels, and M and N are both positive integers; define M i is all partitions in the i-th row direction, 1≤i≤M; each backlight partition is independent of each other and internally contains a R / G / B three-primary light source with adjustable brightness and color;

[0009] (2) Complementary color frame reduction: using the complementary color frame reduction technology, the field sequential liquid crystal display technology which requires three sub-frames to display according to the time color mixing principle is changed into a double-frame modulation technology based on complementary colors, achieving the purpose of frame reduction;

[0010] (3) Backlight partition color modulation: each partition of the backlight independently completes the modulation of brightness and color according to the time sequence requirements.

[0011] In an embodiment of the present application, in step (1), the light source is an LED, Mini-LED or Micro-LED light source.

[0012] In an embodiment of the present application, the specific implementation of step (2) is:

[0013] 1) Splitting and reconstruction of image data: split a frame of image data into R, G, and B three primary color sub-frame data according to color, and use the complementary color frame reduction technology to combine any two of the three sub-frames into a double-primary color sub-frame, and the remaining sub-frame is called a single-primary color sub-frame;

[0014] 2) Double-frame modulation: double-primary color sub-frames and single-primary color sub-frames are displayed alternately, and according to the time color mixing principle, a correct image is presented on the human eye; in addition, according to the spatial color mixing technology, the double-primary color sub-frames complete the mixing of the two primary colors in the same sub-frame period;

[0015] According to steps 1) and 2), combined with the time color mixing principle and the spatial color mixing technology, the display time of an image is reduced from 3 sub-frame periods to 2 sub-frame periods, thereby realizing complementary color frame reduction display.

[0016] In an embodiment of the present application, the specific implementation of step (3) is:

[0017] 1) In a double-primary color sub-frame period:

[0018] S1, liquid crystal molecule deflection: all liquid crystal pixel molecules corresponding to the backlight partition are deflected according to the display image data corresponding to the double primary colors;

[0019] S2, backlight partition lighting: after the liquid crystal molecules complete deflection, the light sources in the backlight partition simultaneously light up the two primary colors of the light sources according to the new different primary color backlight brightness data, realize the spatial color mixing of the two colors, so as to realize the separate modulation of brightness and color in the corresponding backlight partition;

[0020] S3, backlight partition maintains lighting: maintain lighting of the two primary colors of the light sources in the corresponding partition, the time is t1, t1

[0021] S4, turn off the light source of the corresponding partition backlight, the time is t2, t2

[0022] 2) Single primary color sub-frame period:

[0023] S5, liquid crystal molecule deflection: all liquid crystal pixel molecules corresponding to the backlight partition are deflected according to the display image data corresponding to the single primary color;

[0024] S6, backlight partition lighting: after the liquid crystal molecules complete deflection, the light sources in the backlight partition simultaneously light up the other primary color of the light sources according to the new different primary color backlight brightness data, realize the time color mixing of the third primary color and the first two primary colors, so as to realize the modulation of brightness and color in the corresponding backlight partition again;

[0025] S7, backlight partition maintains lighting: maintain lighting of the two primary colors of the light sources in the corresponding partition, the time is t1, t1

[0026] S8, turn off the light source of the corresponding partition backlight, the time is t2, t2

[0027] 3) Repeat steps 1) and 2);

[0028] The order of the single primary color sub-frame and the double primary color sub-frame in steps 1) and 2) can be exchanged, that is, the time color mixing can be performed first and then the spatial color mixing, or the spatial color mixing can be performed first and then the time color mixing in a single partition.

[0029] In an embodiment of the present application, the calculation method of the light emitting brightness of the light source in each partition of the backlight is as follows:

[0030] 1) Obtain the brightness conversion relationship formula based on the spatial color mixing technology and the time color mixing principle of liquid crystal display:

[0031]

[0032] Wherein, s represents a single primary color, YS Ys represents the final luminance of the corresponding single primary color s in spatial color mixing s Ys represents the final luminance of the corresponding single primary color s in time color mixing; n represents the total number of subframes corresponding to the single primary color s based on the time color mixing method; k represents the subframe number, 1≤k≤n; Ys(k) represents the backlight luminance of the kth subframe; σs(k) represents the liquid crystal transmittance in the kth subframe; q represents the ratio of the time when the backlight is turned on to the total time in the single primary color subframe, that is, the backlight duty cycle corresponding to the single primary color s subframe; k Ys(k) represents the backlight luminance of the kth subframe; σs(k) represents the liquid crystal transmittance in the kth subframe; q represents the ratio of the time when the backlight is turned on to the total time in the single primary color subframe, that is, the backlight duty cycle corresponding to the single primary color s subframe; k Ys(k) represents the backlight luminance of the kth subframe; σs(k) represents the liquid crystal transmittance in the kth subframe; q represents the ratio of the time when the backlight is turned on to the total time in the single primary color subframe, that is, the backlight duty cycle corresponding to the single primary color s subframe;

[0033] 2) Luminance calculation corresponding to backlight partitioning: for the display of single primary color s, the following formula is true:

[0034]

[0035] where Ys represents the final luminance of the corresponding single primary color s in spatial color mixing s Y' represents the time color mixing backlight luminance matrix of the entire partition, and Y'(i,j) represents the time color mixing backlight luminance of the pixel with respect to the a partition coordinates (i,j); S Y' represents the time color mixing backlight luminance matrix of the entire partition, and Y'(i,j) represents the time color mixing backlight luminance of the pixel with respect to the a partition coordinates (i,j); k Y' represents the time color mixing backlight luminance matrix of the entire partition, and Y'(i,j) represents the time color mixing backlight luminance of the pixel with respect to the a partition coordinates (i,j); σs(i,j) represents the spatial color mixing backlight luminance of the pixel with respect to the a partition coordinates (i,j); k Y' represents the time color mixing backlight luminance matrix of the entire partition, and Y'(i,j) represents the time color mixing backlight luminance of the pixel with respect to the a partition coordinates (i,j); since the backlight intensity in a single partition is the same in partitioning, and there are i×j pixels in a single partition, the luminance after the liquid crystal of a single backlight partition is obtained by weighted calculation on the display image data:

[0036] Y' = f(Y S ')Y' represents the single backlight partition RGB light source driving luminance data; Y S Y' represents the time color mixing backlight luminance matrix of the entire partition, and Y'(i,j) represents the time color mixing backlight luminance of the pixel with respect to the a partition coordinates (i,j); f(Y S ') represents a function f acting on the luminance of each pixel; the light source driving light intensity of a single partition in partitioning is obtained from the above relationship, thereby realizing the conversion of image data to backlight data.

[0037] In an embodiment of the present application, the backlight row partition scanning control mode and the corresponding backlight row partition lighting timing in a subframe period are as follows:

[0038] 1) Each partition in the row direction of the backlight is connected by a row scanning line and is controlled by a row scanning signal;

[0039] 2) In a single subframe period, the backlight partitions are scanned in the row direction by row from the 1st to the mth row;

[0040] 3) The scanning to the i-th row partitioni When the M i All the backlight partitions are not lit up;

[0041] 4) M1 to M i-1 All the backlight partitions are lit up according to the refreshed light source brightness data, while M i+1 to M m All the backlight partitions maintain the light source lit up according to the data before refreshing.

[0042] In an embodiment of the present application, the refreshing mechanism of the brightness data in the backlight partitions in a sub-frame period includes two methods of uniform refreshing display and rolling refreshing display, which are as follows:

[0043] 1) Uniform refreshing display: in a single sub-frame, when scanning the first backlight row partition M1, the conversion calculation of the new light source brightness data of all the partitions corresponding to the entire sub-frame is completed and stored, which is as follows:

[0044] When scanning the first backlight row partition M1, all the row direction partitions corresponding to M1 are not lit up; and in the entire scanning period, the conversion calculation of the single-frame image data to the brightness value of the backlight corresponding to all the partitions is completed and stored in the register; then all the backlight partitions are lit up according to the new data row by row;

[0045] 2) Rolling refreshing display: in a single sub-frame, when scanning the current row partition, the conversion calculation of the new light source brightness data in the current row partition is completed and stored, and until scanning away from the current row partition, the backlight partitions are lit up according to the new data, which is as follows:

[0046] When scanning the backlight row partition M i , all the row direction partitions corresponding to it are not lit up; and in the entire scanning period, the conversion calculation of the single-color image data of the partition corresponding to M i to the brightness value of the backlight partition light source is completed and stored in the corresponding light source data register; when scanning to the next row partition M i , the latest M i+1 partition light source brightness data is input into the light source data register, and the different partitions on M i+1 are lit up according to the new light emission brightness data; i

[0047] The two refreshing methods of uniform refreshing display and rolling refreshing display complete the conversion calculation and storage of the brightness data corresponding to the single primary color in the single-primary-color sub-frame, and complete the conversion calculation and storage of the brightness data corresponding to the double primary color in the double-primary-color sub-frame.

[0048] ​In an embodiment of the present application, the lightening brightness of different color light sources in each backlight partition corresponding to the dual-primary color sub-frame and the single-primary color sub-frame is different, so as to generate color blocks with different brightness and different colors, which are as follows: in the dual-primary color sub-frame time, any two primary colors of R, G and B are selected to mix, and according to the different lightening brightness requirements of the corresponding backlight partition, the corresponding light sources of the two primary colors are lightened to realize the color mixing of the two primary colors in space in one sub-frame; in the single-primary color sub-frame time, according to the different lightening brightness requirements of the corresponding backlight partition, the corresponding primary color light of the corresponding light source is lightened.

[0049] Compared with the prior art, the present application has the following beneficial effects: the display method provided by the present application combines the complementary color frame reduction and the partition color adjustment technology, can not only realize the partition color adjustment of the backlight, but also reduces the high requirement of the original field sequential three sub-frame refreshing mode on the frame rate of the display; the method is an effective way for the liquid crystal display to realize the ultra-high resolution, the ultra-high gray scale and the brightness. BRIEF DESCRIPTION OF DRAWINGS

[0050] Figure 1 It is a principle block diagram of the liquid crystal display method combining the complementary color frame reduction and the partition color adjustment technology in the present application;

[0051] Figure 2 It is a complementary color mixing principle diagram in the present application;

[0052] Figure 3 It is a backlight partition and a liquid crystal pixel structure in the partition in the present application;

[0053] Figure 4 It is a backlight row partition structure and a row partition scanning mode in the present application. DETAILED DESCRIPTION

[0054] The technical solutions of the present application will be specifically described below with reference to the drawings.

[0055] The present application provides a display method combining the complementary color frame reduction and the partition color adjustment technology, realizes the display white balance principle based on the complementary color, mixes any two colors of RGB three primary colors through the spatial color mixing technology, mixes the third primary color light to realize the white light by using the time color mixing principle, and achieves the display frame reduction purpose. Each three primary color light source in the partition is color modulated according to the image signal corresponding to the partition, and the brightness and the color in each partition are modulated at the same time. The implementation steps of the method are as follows:

[0056] (1) Backlight partition: the liquid crystal backlight module is divided into MxN partitions, M and N respectively correspond to the partition numbers in the row and column directions of the liquid crystal pixels, and M and N are both positive integers; M iFor all partitions in the i-th row direction, 1≤i≤M; each backlight partition is independent of each other and internally contains an R / G / B three-primary color light source with adjustable brightness;

[0057] (2) Complementary color frame reduction: using complementary color frame reduction technology, the field sequential liquid crystal display technology which needs three sub-frames to display respectively according to the time color mixing principle is changed into a double-frame modulation technology based on complementary color, so as to achieve the purpose of frame reduction.

[0058] (3) Backlight partition color modulation: each backlight partition independently completes the modulation of brightness and color of the partition according to the time sequence requirement.

[0059] The following is the specific implementation process of the present application.

[0060] The present application provides a display method combining complementary color frame reduction and partition color modulation technology, comprising:

[0061] (1) Backlight partition: the liquid crystal backlight module is divided into MxN partitions, M and N correspond to the number of liquid crystal pixel row and column direction partitions respectively, and M and N are both positive integers; meanwhile, M i For all partitions in the i-th row direction, 1≤i≤M; each backlight partition is independent of each other and internally contains an R / G / B three-primary color light source with adjustable brightness;

[0062] (2) Complementary color frame reduction technology: using complementary color frame reduction technology, the field sequential liquid crystal display technology which needs three sub-frames to display respectively according to the time color mixing principle is changed into a double-frame modulation technology based on complementary color, so as to achieve the purpose of frame reduction.

[0063] (3) Backlight partition color modulation: combining time color mixing and space color mixing technology, each backlight partition independently completes the modulation of brightness and color of the partition according to the time sequence requirement.

[0064] The original time mixing display needs to divide a frame of image into R, G, B three sub-frames to display respectively, and the present application proposes to reduce three sub-frames to two sub-frames according to the complementary color mixing principle. The specific method is: first, according to the time color mixing principle, a frame of image is divided into two sub-frames to display according to the time color mixing principle, and the two sub-frames can be divided into a double-primary color sub-frame and a single-primary color sub-frame according to the three primary colors displayed; second, according to the space color mixing principle, the double-primary color sub-frame completes the color mixing of two primary colors in the same sub-frame; finally, according to the time color mixing principle, a frame of image displayed can be a double-primary color sub-frame and a single-primary color sub-frame, or the order can be reversed.

[0065] In the dual-primary color sub-frame time, any two of the three primary colors R, G and B can be selected for mixing, and the LED light source corresponding to the two primary colors is lit according to different brightness requirements to realize the spatial mixing of the two primary colors in the sub-frame. In the single-primary color sub-frame time, the corresponding primary color light of the LED light source is lit according to different brightness requirements of the primary color.

[0066] As a further technical solution of the present application,

[0067] The response time sequence of the liquid crystal pixel molecules in the corresponding backlight partition and the lighting time sequence of the light source in the partition are as follows:

[0068] 1) In the dual-primary color sub-frame period:

[0069] S1, liquid crystal molecule deflection. All liquid crystal pixel molecules corresponding to the backlight partition are deflected at an angle according to the display image data of the dual-primary color.

[0070] S2, backlight partition lighting. After the liquid crystal molecules complete deflection, the LED light source in the backlight partition simultaneously lights up the two primary colors of the LED light source according to the new different primary color backlight brightness data, realizes the spatial mixing of the two colors, and thus realizes the separate modulation of brightness and color in the corresponding backlight partition;

[0071] S3, backlight partition maintains lighting. The two primary color light sources of the partition backlight are maintained to be lit for a time t1, t1

[0072] S4, turn off the backlight light source of the partition for a time t2, t2

[0073] 2) In the single-primary color sub-frame period:

[0074] S5, liquid crystal molecule deflection. All liquid crystal pixel molecules corresponding to the backlight partition are deflected at an angle according to the display image data of the single-primary color.

[0075] S6, backlight partition lighting. After the liquid crystal molecules complete deflection, the LED light source in the backlight partition simultaneously lights up the other primary color of the LED light source according to the new different primary color backlight brightness data, realizes the time mixing of the third primary color and the first two primary colors, and thus realizes the modulation of brightness and color again in the corresponding backlight partition;

[0076] S7, backlight partition maintains lighting. The two primary color light sources of the partition backlight are maintained to be lit for a time t1, t1

[0077] S8, turn off the backlight light source of the partition for a time t2, t2

[0078] 3) Repeat steps 1) and 2).

[0079] The order of the single primary color sub-frame and the double primary color sub-frame in step 1) and step 2) can be exchanged, that is, the time color mixing can be performed first and then the space color mixing, or the space color mixing can be performed first and then the time color mixing in a single partition.

[0080] The original data stream of the traditional liquid crystal display is converted into the brightness of the new partition color mixing liquid crystal display, and then the brightness conversion relationship from the traditional space color mixing liquid crystal display to the time color mixing field sequence liquid crystal display suitable for all liquid crystal screens is used:

[0081]

[0082] In the formula, s represents a certain primary color, Y s represents the final brightness of the corresponding single primary color s in the space color mixing, Y s ' is the final brightness of the corresponding single primary color s in the time color mixing; n is the total number of sub-frames corresponding to the time color mixing method when the single primary color; k is the sub-frame number, 1≤k≤n; Y k is the backlight brightness of the kth sub-frame; σ k is the liquid crystal transmittance in the kth sub-frame; q is the ratio of the time when the backlight is turned on to the total time when the single primary color sub-frame, that is, the backlight duty cycle corresponding to the s primary color sub-frame. The brightness information is converted into display driving data stream to realize the calculation of display gray scale and brightness.

[0083] The display method combining the complementary color frame reduction and the partition color mixing technology according to the application has the following specific scheme for the refresh of the pixel after the backlight scanning and the data storage:

[0084] 1) Unified refresh: in a single sub-frame, the conversion calculation and storage of the new light source brightness data corresponding to all partitions of the entire sub-frame are completed in the first backlight row partition M1 scanning period.

[0085] Specifically, when the first backlight row partition M1 is scanned, all row direction partitions corresponding to the M1 are not lit; and in the entire scanning period, the conversion calculation of the single frame image data to the brightness value of the backlight corresponding to each partition is completed and stored in the memory. When the next row partition is scanned after leaving the M1, the latest M1 partition light source brightness data is stored in the light source register, so that the different partitions on the M1 are lit according to the new brightness.

[0086] 2) Rolling refresh: in a single sub-frame, when the current row partition is scanned, the conversion calculation and storage of the new light source brightness data in the current row partition are completed, and until the current row partition is scanned, the backlight partition is lit according to the new data, and the specific process is as follows:

[0087] When the backlight row partition M iAt this time, all the corresponding row direction partitions are not lit; and during the entire scanning time period, the M i partition corresponding to the partition monochrome image data to the backlight partition light source luminance value conversion calculation, and stored in the light source register; when leaving M i Start scanning to the next row partition M i+1 The latest M i+1 Partition light source luminance data into the light source register, M i-1 The different partitions on M

[0088] The above two refresh modes, in the single base color sub-frame, complete the corresponding single base color luminance conversion calculation and storage; and in the double base color sub-frame, complete the corresponding double base color luminance conversion calculation and storage.

[0089] The storage method of the three primary color backlight luminance data of the display method combining complementary color frame reduction and partition color adjustment technology is as follows: the backlight luminance data of the first primary color and the second primary color are respectively stored in the high byte of the mixed color frame 16bit information register and the low byte of the mixed color frame information 16bit register; the gray scale information of the third primary color is stored separately in the high byte or low byte of the monochrome frame 16bit, or stored separately in the monochrome frame 8bit.

[0090] The time relationship of the backlight opening and closing of the display method combining complementary color frame reduction and partition color adjustment technology is as follows: assuming that the backlight closing time t c1 of the first sub-frame in step S4 or step S8 and the backlight closing time t c2 of the second sub-frame, the backlight opening time of the first sub-frame in step S3 or step S7 is t o1 , and the backlight opening time of the second sub-frame is t o2 , the time occupied by a frame picture is T, then T=t c1 +t c2 +t o2 +t o1 , t o2 =t o1 >t c , and t c =t c1 =t c2 is equal to the liquid crystal molecule construction completion time, about 1ms. By using synchronous triggering, the opening time of the backlight of the corresponding frame corresponding partition is consistent with the deflection end time of the liquid crystal molecule.

[0091] Example 1:

[0092] Take yellow and blue as complementary colors for example, yellow sub-frame uses red and green for color mixing in one time, and blue sub-frame uses another sub-frame, if yellow and blue can meet the white balance condition, the color display requirement can be realized.

[0093] The display method combines complementary color frame reduction and partition color adjustment technology, and the complementary color time color mixing is as shown in Figure 1 A frame is divided into two sub-frames to complete color mixing, for example, yellow sub-frame and blue sub-frame, which display the brightness and color of corresponding image data in two adjacent time periods, so that the final color mixing effect can be realized.

[0094] The display method combines complementary color frame reduction and partition color adjustment technology, and the basic implementation process is as shown in Figure 1 The scheme takes the region image content in the partition backlight as a reproduction constraint condition, divides the liquid crystal backlight module into MxN partitions according to the partition color adjustment method, M and N correspond to the partition numbers in the row and column directions of the liquid crystal pixels respectively, and M and N are positive integers; then the brightness data of the image is calculated according to the brightness conversion relationship formula based on the space color mixing technology and the time color mixing principle of the liquid crystal display, the brightness calculation formula of the backlight partition and the brightness calculation formula of the liquid crystal after the single backlight partition, and is converted into the backlight driving data of the RGB LED, so that the driving of the RGB backlight partition is realized through cooperation with the register.

[0095] The display method combines complementary color frame reduction and partition color adjustment technology, and the relationship table for realizing white balance of the complementary color is as shown in Figure 2 The three pairs of complementary colors are taken as examples, and according to the color mixing principle, white light can be mixed out of the three pairs of complementary colors, that is, the color mixing of all colors can be realized.

[0096] The display method combines complementary color frame reduction and partition color adjustment technology, and the complementary color backlight partition is as shown in Figure 3 The liquid crystal backlight module is divided into MxN partitions, M and N correspond to the partition numbers in the row and column directions of the liquid crystal pixels respectively, and M and N are positive integers; M i is defined as all partitions in the i-th row direction, at this time 1≤i≤M; each backlight partition is independent and contains an RGB LED light source with adjustable brightness of three primary colors in the interior;

[0097] The display method combines complementary color frame reduction and partition color adjustment technology, and the row partition scanning schematic diagram M1-MI is as shown in Figure 4 The specific scheme of the backlight scanning control is as follows:

[0098] 1) Any M iEach partition on the row partition is connected and controlled by a row scanning line, and the backlight partitions in a single sub-frame maintain the lighting state according to the refreshed LED light brightness data from M1 to M m The row direction partition-by-partition scanning is sequentially implemented;

[0099] 2) The scanning reaches M i When the row partition, the corresponding M i row backlight partition is not lit;

[0100] 3) The backlight partitions of the rows from 1 to M i-1 maintain the lighting state according to the refreshed LED light brightness data, while the backlight partitions corresponding to the rows from M i+1 to M m partition maintain the lighting state of the LED light according to the data before refreshing.

[0101] The above is the preferred embodiment of the present application, any change made according to the technical solution of the present application, as long as the function generated does not exceed the scope of the technical solution of the present application, belongs to the protection scope of the present application.

Claims

1. A display method combining complementary color frame reduction and zonal color adjustment techniques, characterized in that, The display white balance principle is realized based on complementary colors, any two colors in RGB three primary colors are mixed through spatial color mixing technology, the third primary color light is mixed by using time color mixing principle to realize white light, the display frame reduction purpose is achieved; each three primary color light source in the partition is respectively color modulated according to the image signal corresponding to the partition, the modulation of brightness and color is simultaneously realized in each partition; the method realizes steps as follows: (1) backlight partition: the liquid crystal backlight module is divided into M×N partitions, M and N respectively correspond to the partition number of liquid crystal pixel row and column direction, and M and N are both positive integers; Definition M i For all partitions in the i-th row direction, 1≤i≤M; each backlight partition is independent of each other and contains an R / G / B three-primary color light source with adjustable brightness respectively; (2) complementary color frame reduction: the complementary color frame reduction technology is adopted, the field sequential liquid crystal display technology which needs three subframes to be respectively displayed according to the time color mixing principle is changed into the double-frame modulation technology based on complementary colors, the frame reduction purpose is achieved; (3) backlight partition color modulation: each partition of the backlight independently completes the modulation of brightness and color of the partition according to the time sequence requirement; The specific implementation mode of step (2) is as follows: 1) image data splitting and reconstruction: one frame of image data is split into R, G and B three primary color subframe data according to color, the complementary color frame reduction technology is used to combine any two subframes in the three subframes into double primary color subframes, and the remaining subframe is called single primary color subframe; 2) double-frame modulation: the double primary color subframe and the single primary color subframe are displayed alternately, correct images are presented on the human eye according to the time color mixing principle; in addition, according to the spatial color mixing technology, the double primary color subframe completes the color mixing of two primary colors in one same subframe period; According to steps 1) and 2), combined with the time color mixing principle and the spatial color mixing technology, the display time of one image is reduced from three subframe periods to two subframe periods, so that the complementary color frame reduction display is realized; The specific implementation mode of step (3) is as follows: 1) in the double primary color subframe period: S1, liquid crystal molecule deflection: all liquid crystal pixels corresponding to the backlight partition are deflected according to the display image data of the double primary color; S2, backlight partition lighting: after the liquid crystal molecule completes the deflection, the light source in the backlight partition simultaneously lights up the two primary colors of the light source according to the new different primary color backlight brightness data, so that the spatial color mixing of the two colors is realized, thereby the modulation of brightness and color in the corresponding backlight partition is realized; S3, maintaining the lighting of the two primary color light sources of the corresponding partition backlight, the time is t1, t1 S4, turn off the light source of the corresponding partition backlight, the time is t2, t2 2) in the single primary color subframe period: S5, liquid crystal molecule deflection: all liquid crystal pixels corresponding to the backlight partition are deflected according to the display image data of the single primary color; S6, backlight partition lighting: after the liquid crystal molecule completes the deflection, the light source in the backlight partition simultaneously lights up the other primary color of the light source according to the new different primary color backlight brightness data, so that the time color mixing of the third primary color and the first two primary colors is realized, thereby the modulation of brightness and color in the corresponding backlight partition is realized again; S7, maintaining the lighting of the two primary color light sources of the corresponding partition backlight, the time is t1, t1 S8, turn off the backlight of the sub-area, time t2, t2 3) repeat steps 1) and 2); The order of the single-primary-color sub-frame and the double-primary-color sub-frame in steps 1) and 2) can be exchanged, that is, the time color mixing can be performed first and then the spatial color mixing, or the spatial color mixing can be performed first and then the time color mixing in a single sub-area.

2. The display method of claim 1, wherein the complementary color frame reduction and the partitioning color adjustment are combined. In step (1), the light source is an LED, Mini-LED or Micro-LED light source.

3. The display method of claim 1, wherein the complementary color frame reduction and the partitioning color adjustment are combined. The backlight row sub-area scanning control mode in a sub-frame period and the corresponding backlight row sub-area lighting timing are as follows: 1) Each sub-area in the row direction of the backlight is connected by a row scanning line and is controlled by a row scanning signal; 2) In a single sub-frame period, the backlight sub-areas are scanned in the row direction from the first to the mth row; 3) Scan to the ith row partition M i M i All backlight partitions are off. 4) M1 to M i-1 All backlight partitions above maintain the lighted state according to the refreshed light source brightness data, while M i+1 to M m All backlight partitions above maintain the lighted state according to the pre-refreshed data.

4. The display method of claim 1, wherein the complementary color frame reduction and the partitioning color adjustment are combined. The refresh mechanism of the brightness data in the backlight sub-area in a sub-frame period includes two methods of uniform refresh display and rolling refresh display, and is as follows: 1) Uniform refresh display: in a single sub-frame, the conversion calculation and storage of the new light source brightness data corresponding to all sub-areas in the entire sub-frame are completed in the scanning period of the first backlight row sub-area M1, and are as follows: When the first backlight row sub-area M1 is scanned, all row direction sub-areas corresponding to M1 are not lit; and in the entire scanning period, the conversion calculation of the single-frame image data to the primary color brightness value of all backlight sub-areas is completed and is stored in the register; then all backlight sub-areas are lit according to the new data; 2) Rolling refresh display: in a single sub-frame, when the current row sub-area is scanned, the conversion calculation and storage of the new light source brightness data in the current row sub-area are completed, and until the current row sub-area is scanned away, the backlight sub-areas are lit according to the new data, and are as follows: When the backlight row partition M is scanned i At that time, all corresponding partitions in that row direction will not be lit; and throughout the entire scan period, the connection with M will be completed. i The conversion calculation from monochrome image data of the corresponding partition to the backlight partition light source brightness value is performed and stored in the corresponding light source data register; when leaving M i Start scanning to the next row partition M i+1 At that time, the latest M i+1 The brightness data of the zoned light source is written into the data register of the light source, while M i Different zones on the screen are illuminated according to the new luminance data; The two refresh methods of uniform refresh display and rolling refresh display complete the conversion calculation and storage of the brightness data corresponding to the single primary color in a single-primary-color sub-frame, and complete the conversion calculation and storage of the brightness data corresponding to the double primary color in a double-primary-color sub-frame.

5. The display method of claim 1, wherein the method further comprises: The lighting brightness of different color light sources in each backlight sub-area corresponding to the double-primary-color sub-frame and the single-primary-color sub-frame is different, different brightness and different color blocks are generated, and are as follows: in the double-primary-color sub-frame time, any two primary colors of R, G and B are selected for mixing, and according to the different light brightness requirements of the corresponding backlight sub-areas, the corresponding light sources corresponding to the two primary colors are lit, to realize the spatial color mixing of the two primary colors in a single sub-frame; In the single-primary-color sub-frame time, according to the different light brightness requirements of the corresponding backlight sub-areas, the corresponding primary color light of the corresponding light source is lit.

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