Backlight control method, display chip and display device

Abstract

The present invention discloses a backlight control method, a display chip and a display device, the method comprising: determining quantity-related information according to the number of pixels corresponding to an image frame to be displayed and the number of backlight partitions; determining multiple target areas based on the quantity-related information, a target area includes multiple backlight partitions, the number of pixels corresponding to each backlight partition belonging to the same target area is the same, and the number of pixels corresponding to the backlight partitions in any two adjacent target areas is different; generating dimming data corresponding to the backlight partition according to the pixel data included in the image partition determined in the image frame to be displayed according to the number of pixels corresponding to the backlight partition in the target area. When the above-mentioned setting is performed, when the backlight is turned on following the opening of the pixel area on the display panel, each backlight partition will be turned on in sequence, thereby reducing the probability of two adjacent backlight partitions being turned on at the same time, alleviating the problem of afterimages visually presented in the display screen, and improving the display quality.

Description

Technical Field

[0001] The present invention relates to the field of display technology, and in particular to a backlight control method, a display chip and a display device. Background Art

[0002] With the popularity of backlight units (BLUs) that use sub-millimeter light emitting diodes (mini-LEDs) as backlight sources, the number of zones divided in the BLU is increasing in display devices that use local dimming technology (LDs). Since the dimming data used by each block to determine its own backlight brightness is determined based on the pixel data of multiple pixels (pixels) corresponding to the block in the image to be displayed, when there are many zones divided in the BLU, the number of pixels corresponding to each block will be non-integer. For example, for an image frame to be displayed with a resolution of 3840×2160, when 100×100 zones are divided in the BLU, each block corresponds to 38.4×21.6 pixels.

[0003] In practical applications, the dimming data corresponding to each block is calculated using an application-specific integrated circuit (ASIC). However, due to the hardware characteristics of the ASIC, it is not possible to use pixel data of a fractional number of pixels for calculation. Therefore, the number of pixels corresponding to each block is usually converted into an integer. For example, when it is determined that each block corresponds to 38.4×21.6 pixels according to the above example, for multiple blocks arranged in the horizontal direction, the first block corresponds to 38 pixels in the horizontal direction, the second block corresponds to 39 pixels in the horizontal direction, the third block corresponds to 38 pixels in the horizontal direction, and so on, so as to realize the calculation of the dimming data of each block by the ASIC.

[0004] However, in the above block distribution situation, since the number of pixels corresponding to each two adjacent blocks is different, when the screen displays images, especially when displaying dynamic images, as the pixels on the screen are turned on, there will be a pixel block corresponding to two adjacent blocks on the BLU. At this time, the two adjacent blocks will both emit light, causing the display image to visually have an afterimage (English: Tail) phenomenon, resulting in a deterioration in the display effect of the display device. Summary of the invention

[0005] The present invention provides a backlight control method, a display chip and a display device, which are used to solve the problem that in the existing process of determining the dimming data corresponding to each backlight partition, the number of pixels corresponding to each backlight partition is always changing. Therefore, when displaying dynamic images, two adjacent backlight partitions are turned on at the same time, causing the display screen to visually present an afterimage.

[0006] In a first aspect, an embodiment of the present invention provides a backlight control method, comprising:

[0007] Determine quantity-related information according to the number of pixels corresponding to the image frame to be displayed and the number of backlight partitions divided on the backlight panel;

[0008] Based on the quantity-related information, a plurality of target areas are determined in the backlight panel, wherein the number of pixels corresponding to the backlight subareas belonging to the same target area is the same, and the number of pixels corresponding to the backlight subareas in any two adjacent target areas is different;

[0009] For any target area, dimming data corresponding to the backlight partition is generated according to the number of pixels corresponding to the backlight partition in the target area and the pixel data included in the image partition determined in the image frame to be displayed.

[0010] In the backlight control method provided by the embodiment of the present invention, multiple target areas are determined on the backlight panel according to the number-related information determined by the number of pixels corresponding to the image frame to be displayed and the number of backlight partitions; each target area includes multiple backlight partitions, and the number of pixels corresponding to each backlight partition in a target area is the same, and the number of pixels corresponding to the backlight partitions in two adjacent target areas is different. When the number of pixels corresponding to the backlight partitions is set as above, for a target area, since the number of pixels corresponding to the backlight partitions along the row direction is the same, when the backlight of the corresponding backlight partition is turned on following the opening of the pixel area on the display panel, each backlight partition in the target area will turn on the backlight in turn according to the order in which the pixel area is turned on, thus avoiding the situation in which the backlight of two adjacent backlight partitions is turned on at the same time, thereby reducing the visual problems of afterimages and halos presented by the display screen, improving the display quality, and optimizing the display performance.

[0011] In an optional embodiment, the plurality of target areas are arranged in an N×M array on the backlight panel, wherein M and N are both positive integers greater than 1;

[0012] In the M target areas arranged along the row direction, the backlight subareas in any two adjacent target areas have different numbers of pixels corresponding to them along the row direction, and the same number of pixels corresponding to them along the column direction;

[0013] In the N target areas arranged along the column direction, the backlight subareas in any two adjacent target areas have different numbers of pixels corresponding to them along the column direction, and the same number of pixels corresponding to them along the row direction.

[0014] In the above embodiment, the number of pixels corresponding to the backlight partitions in the M target areas arranged along the row direction is the same, wherein the number of pixels corresponding to the backlight partitions in the row direction of two adjacent target areas is different; the number of pixels corresponding to the backlight partitions in the row direction of the N target areas arranged along the column direction is the same, wherein the number of pixels corresponding to the backlight partitions in the column direction of two adjacent target areas is different. When the number of pixels corresponding to the backlight partitions is set as above, for a target area, since the number of pixels corresponding to the backlight partitions in the row direction and the column direction are the same, when the backlight of the corresponding backlight partition is turned on following the opening of the pixel area on the display panel, each backlight partition in the target area will turn on the backlight in sequence according to the opening order of the pixel area, and the situation that two adjacent backlight partitions turn on the backlight at the same time will not occur. In this way, during the entire display process, the probability of the situation that two adjacent backlight partitions turn on the backlight at the same time will be greatly reduced, thereby effectively alleviating the visual problems of afterimages and halos presented by the display screen, improving the display quality, and optimizing the display performance.

[0015] In an optional embodiment, the quantity-related information includes the first pixel number, the second pixel number, the total number of backlight subareas corresponding to the first pixel number, and the total number of backlight subareas corresponding to the second pixel number;

[0016] Among the M target areas arranged along the row direction, the number of pixels corresponding to the backlight partition included in the kth target area along the row direction is the first number of pixels, and the number of pixels corresponding to the backlight partition included in the k+1th target area along the row direction is the second number of pixels, wherein 1≤k≤M-1.

[0017] In the above embodiment, for any target area among the M target areas along the row direction, the number of pixels corresponding to the backlight partition along the row direction is set to a first number of pixels, and the number of pixels corresponding to the backlight partition along the row direction in the target area adjacent to the target area is set to a second number of pixels, so as to ensure that the target area to which the backlight partition corresponding to the first number of pixels along the row direction belongs is spaced from the target area to which the backlight partition corresponding to the second number of pixels along the row direction belongs, thereby effectively ensuring the coordination and uniformity of the overall display brightness of the display image and improving the image display quality.

[0018] In an optional embodiment, among the M target areas arranged along the row direction, the number of pixels corresponding to the backlight partition included in the first target area along the row direction is the same as the number of pixels corresponding to the backlight partition included in the Mth target area along the row direction.

[0019] In the above embodiment, by setting the number of pixels corresponding to the backlight partition in the first target area along the row direction in the M target areas arranged along the row direction to be the same as the number of pixels corresponding to the backlight partition in the Mth target area along the row direction, the target areas to which the backlight partition corresponding to the first number of pixels along the row direction belongs and the target areas to which the backlight partition corresponding to the second number of pixels along the row direction belong are symmetrically distributed. For example, the number of pixels corresponding to the backlight partition in the multiple target areas arranged along the row direction may be "the first number of pixels, the second number of pixels, the first number of pixels, the second number of pixels, ..., the first number of pixels, the second number of pixels, the first number of pixels". In this way, on the one hand, the probability of the adjacent backlight partitions lighting up at the same time can be effectively reduced, thereby reducing the visual afterimages, halos and other phenomena presented by the display screen, and improving the display effect; on the other hand, the coordination and uniformity of the overall display brightness of the display screen can be effectively ensured, and the display quality of the screen can be improved.

[0020] In an optional embodiment, among the M target areas arranged along the row direction, the number of backlight partitions along the row direction included in the i-th target area is the same as the number of backlight partitions along the row direction included in the j-th target area, wherein 1≤i≤(M-1) / 2, and the sum of i and j is M+1.

[0021] In the above embodiment, by setting the numbers of backlight partitions along the row direction to be the same in two target areas at symmetrical positions among the M target areas arranged along the row direction, it can be ensured that the target areas to which the backlight partitions corresponding to the first number of pixels along the row direction belong are evenly and alternately and symmetrically distributed with the target areas to which the backlight partitions corresponding to the second number of pixels along the row direction belong, thereby reducing the probability of the adjacent backlight partitions being lit up at the same time and ensuring the coordination and uniformity of the overall display brightness of the display screen, thereby effectively improving the display quality of the screen.

[0022] In an optional embodiment, the quantity-related information further includes a third pixel number, a fourth pixel number, a total number of backlight subareas corresponding to the third pixel number, and a total number of backlight subareas corresponding to the fourth pixel number;

[0023] For any target area, among the N target areas arranged along the column direction, the number of pixels corresponding to the backlight partition included in the rth target area along the column direction is the third number of pixels, and the number of pixels corresponding to the backlight partition included in the r+1th target area along the column direction is the fourth number of pixels, wherein 1≤r≤N-1.

[0024] In the above embodiment, for any target area among the N target areas arranged along the column direction, the number of pixels corresponding to the backlight partition along the column direction is set to the third number of pixels, and the number of pixels corresponding to the backlight partition along the column direction in the target area adjacent to the target area is set to the fourth number of pixels, so as to ensure that the target area to which the backlight partition corresponding to the third number of pixels along the column direction belongs is spaced from the target area to which the backlight partition corresponding to the fourth number of pixels along the column direction belongs, thereby effectively ensuring the coordination and uniformity of the overall display brightness of the display screen and improving the display quality of the screen.

[0025] In an optional embodiment, among the N target areas arranged along the column direction, the number of pixels corresponding to the backlight partition included in the first target area along the column direction is the same as the number of pixels corresponding to the backlight partition included in the Nth target area along the column direction.

[0026] In the above embodiment, by setting the number of pixels corresponding to the backlight partition in the first target area along the column direction in the N target areas arranged along the column direction to be the same as the number of pixels corresponding to the backlight partition in the Nth target area along the column direction, the target areas to which the backlight partition corresponding to the third number of pixels along the column direction belongs and the target areas to which the backlight partition corresponding to the fourth number of pixels along the column direction belong are symmetrically distributed. For example, the number of pixels corresponding to the backlight partition in the multiple target areas arranged along the column direction may be "the third number of pixels, the fourth number of pixels, the third number of pixels, the fourth number of pixels, ..., the third number of pixels, the fourth number of pixels, the third number of pixels". In this way, on the one hand, the probability of the adjacent backlight partitions being lit at the same time can be effectively reduced, thereby reducing the visual afterimages, halos and other phenomena presented by the display screen, and improving the display effect; on the other hand, the coordination and uniformity of the overall display brightness of the display screen can be effectively ensured, and the display quality of the screen can be improved.

[0027] In an optional embodiment, among the N target areas arranged along the column direction, the number of backlight partitions included in the p-th target area along the row direction is the same as the number of backlight partitions included in the q-th target area along the row direction, wherein 1≤p≤(N-1) / 2, and the sum of p and q is N+1.

[0028] In the above embodiment, by setting the numbers of backlight partitions along the column direction to be the same in two target areas at symmetrical positions among the N target areas arranged along the column direction, it can be ensured that the target areas to which the backlight partitions corresponding to the third number of pixels along the column direction belong are evenly and alternately and symmetrically distributed with the target areas to which the backlight partitions corresponding to the fourth number of pixels along the column direction belong, thereby reducing the probability of the adjacent backlight partitions being lit up at the same time and ensuring the coordination and uniformity of the overall display brightness of the display screen, thereby effectively improving the display quality of the screen.

[0029] In an optional embodiment, determining the quantity-related information according to the number of pixels corresponding to the image frame to be displayed and the number of backlight partitions divided on the backlight panel includes:

[0030] Determine the initial number of pixels corresponding to each backlight partition according to the ratio of the number of pixels corresponding to the image frame to be displayed to the number of the backlight partitions, wherein the initial number of pixels includes the number of row pixels and the number of column pixels, wherein the number of row pixels and the number of column pixels are both non-integers;

[0031] Determine, based on the number of row pixels, a first number of pixels and a second number of pixels included in the number-related information, and determine, based on the number of column pixels, a third number of pixels and a fourth number of pixels included in the number-related information;

[0032] According to the number of each pixel included in the number-related information and the number of the backlight subareas, the total number of backlight subareas corresponding to each number of pixels is determined.

[0033] In the above embodiment, when the initial pixel number determined according to the number of pixels corresponding to the image frame to be displayed and the number of backlight partitions is a decimal, multiple integer pixel numbers, i.e., the first pixel number, the second pixel number, the third pixel number, and the fourth pixel number, are determined according to the decimal initial pixel number, and the size of the image partition corresponding to each backlight partition is determined using the determined multiple integer pixel numbers, and the dimming data of the backlight partition is determined according to the pixel data included in the determined image partition. In this way, the hardware does not need to support the calculation of decimals, and the calculation of the dimming data of the backlight partition can also be realized. Therefore, the hardware design cost and hardware size can be reduced, thereby reducing product costs and improving market competitiveness.

[0034] In a second aspect, an embodiment of the present invention provides a display chip, including:

[0035] A quantity information determination module, used to determine quantity-related information according to the number of pixels corresponding to the image frame to be displayed and the number of backlight partitions divided on the backlight panel;

[0036] A region determination module, configured to determine a plurality of target regions in the backlight panel based on the quantity-related information, wherein one target region includes a plurality of backlight partitions, the number of pixels corresponding to the backlight partitions belonging to the same target region is the same, and the number of pixels corresponding to the backlight partitions in any two adjacent target regions is different;

[0037] The backlight value generating module is used to generate dimming data corresponding to the backlight partition for any target area according to the number of pixels corresponding to the backlight partition in the target area and the pixel data included in the image partition determined in the image frame to be displayed.

[0038] In an optional embodiment, the multiple target areas determined by the area determination module are arranged in an N×M array on the backlight panel, where M and N are both positive integers greater than 1;

[0039] In the M target areas arranged along the row direction, the backlight subareas in any two adjacent target areas have different numbers of pixels corresponding to them along the row direction, and the same number of pixels corresponding to them along the column direction;

[0040] In the N target areas arranged along the column direction, the backlight subareas in any two adjacent target areas have different numbers of pixels corresponding to them along the column direction, and the same number of pixels corresponding to them along the row direction.

[0041] In an optional embodiment, the quantity-related information includes the first pixel number, the second pixel number, the total number of backlight subareas corresponding to the first pixel number, and the total number of backlight subareas corresponding to the second pixel number;

[0042] Among the M target areas arranged along the row direction, the number of pixels corresponding to the backlight partition included in the kth target area along the row direction is the first number of pixels, and the number of pixels corresponding to the backlight partition included in the k+1th target area along the row direction is the second number of pixels, wherein 1≤k≤M-1.

[0043] In an optional embodiment, among the M target areas arranged along the row direction, the number of pixels corresponding to the backlight partition included in the first target area along the row direction is the same as the number of pixels corresponding to the backlight partition included in the Mth target area along the row direction.

[0044] In an optional embodiment, among the M target areas arranged along the row direction, the number of backlight partitions along the row direction included in the i-th target area is the same as the number of backlight partitions along the row direction included in the j-th target area, where 1≤i≤(M-1) / 2, and the sum of i and j is M+1.

[0045] In an optional embodiment, the quantity-related information further includes a third pixel number, a fourth pixel number, a total number of backlight subareas corresponding to the third pixel number, and a total number of backlight subareas corresponding to the fourth pixel number;

[0046] Among the N target areas arranged along the column direction, the number of pixels corresponding to the backlight partition included in the rth target area along the column direction is the third number of pixels, and the number of pixels corresponding to the backlight partition included in the r+1th target area along the column direction is the fourth number of pixels, wherein 1≤r≤N-1.

[0047] In an optional embodiment, among the N target areas arranged along the column direction, the number of pixels corresponding to the backlight partition included in the first target area along the column direction is the same as the number of pixels corresponding to the backlight partition included in the Nth target area along the column direction.

[0048] In an optional embodiment, among the N target areas arranged along the column direction, the number of backlight partitions included in the p-th target area along the row direction is the same as the number of backlight partitions included in the q-th target area along the row direction, where, in 1≤p≤(N-1) / 2, the sum of p and q is N+1.

[0049] In an optional embodiment, the quantity information determination module is specifically used to:

[0050] Determine the initial number of pixels corresponding to each backlight partition according to the ratio of the number of pixels corresponding to the image frame to be displayed to the number of the backlight partitions, wherein the initial number of pixels includes the number of row pixels and the number of column pixels, wherein the number of row pixels and the number of column pixels are both non-integers;

[0051] Determine the first number of pixels and the second number of pixels included in the number-related information based on the row number of pixels, and determine the third number of pixels and the fourth number of pixels included in the number-related information based on the column number of pixels;

[0052] According to the number of each pixel included in the number-related information and the number of the backlight subareas, the total number of backlight subareas corresponding to each number of pixels is determined.

[0053] In a third aspect, an embodiment of the present invention provides a display device, including a display panel, a backlight panel, a backlight control chip, and the display chip as described in the second aspect above, wherein:

[0054] The display chip is electrically connected to the backlight control chip and the display panel respectively, and the backlight control chip is also electrically connected to the backlight panel;

[0055] The display panel is arrayed with a plurality of pixels, the backlight panel is divided into a plurality of backlight subareas, and the display panel and the backlight panel are arranged opposite to each other.

[0056] For the technical effects that may be achieved by the display chip disclosed in the second aspect and the display device disclosed in the third aspect, please refer to the technical effects that may be achieved by the first aspect or various possible solutions in the first aspect, and will not be repeated here. BRIEF DESCRIPTION OF THE DRAWINGS

[0057] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0058] Figure 1 A schematic diagram of the corresponding relationship between a block and the number of pixels provided for the related technology;

[0059] Figure 2 A schematic diagram of the corresponding relationship between pixel opening and block backlight lighting provided for the related technology;

[0060] Figure 3 A schematic diagram of an application scenario of a backlight control method provided by an embodiment of the present invention;

[0061] Figure 4 A schematic diagram of a working process of a backlight control method provided by an embodiment of the present invention;

[0062] Figure 5 A schematic diagram of a workflow for determining quantity-related information provided by an embodiment of the present invention;

[0063] Figure 6 A schematic diagram of the distribution of a target area on a backlight panel provided by an embodiment of the present invention;

[0064] Figure 7 A schematic diagram of a method for defining a target area in a backlight panel provided by an embodiment of the present invention;

[0065] Figure 8 A schematic diagram of another method for defining a target area in a backlight panel provided by an embodiment of the present invention;

[0066] Fig. 9 A schematic diagram of another method for defining a target area in a backlight panel provided by an embodiment of the present invention;

[0067] Fig.10A schematic diagram of another method for defining a target area in a backlight panel provided by an embodiment of the present invention;

[0068] Fig.11 A schematic diagram of a module structure of a display chip provided by an embodiment of the present invention;

[0069] Fig.12 A schematic structural diagram of a display device provided by an embodiment of the present invention. DETAILED DESCRIPTION

[0070] In order to make the purpose, technical scheme and advantages of the present invention clearer, the present invention will be further described in detail below with reference to the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0071] It should be noted that the terms "first", "second", etc. in the specification and claims of the present invention and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the data used in this way can be interchanged where appropriate, so that the embodiments of the present invention described herein can be implemented in an order other than those illustrated or described herein. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with the present invention. Instead, they are merely examples of devices and methods consistent with some aspects of the present invention as detailed in the appended claims.

[0072] With the development of image display technology, users have higher and higher requirements for display devices. In order to meet user needs, current display devices mostly use local dimming technology to adjust the backlight brightness. Specifically, the backlight source arrayed on the BLU is divided into multiple independently controlled blocks (i.e., backlight partitions in the embodiment of the present invention). Each block can independently adjust the backlight brightness according to its corresponding display content, so that the area that needs to display dark colors can reduce the brightness, and the area that needs to display bright details can increase the brightness, thereby improving the overall color contrast of the display screen and achieving better visual effects.

[0073] In recent years, in order to provide users with a better display experience, the clarity of display devices has gradually improved, which is directly reflected in the improvement of the resolution of the display device, which has greatly increased the number of pixels on the display panel of the display device. As shown in Table 1 below, the resolution and number of pixels corresponding to display devices of different clarity are:

[0074]

[0075] Table 1

[0076] At present, the most popular display device is the UHD display device. As can be seen from Table 1, in the UHD display device, the array on its display panel is arranged with 3840×2160 pixels, and accordingly, the image frame to be displayed also includes 3840×2160 pixel data, that is, the horizontal direction (English: Horizontal) includes 3840 pixel data, and the vertical direction (English: Vertical) includes 2160 pixel data. Among them, in the process of image display, the 3840×2160 pixel data included in the image frame to be displayed needs to be written one by one into the 3840×2160 pixels on the display panel to realize the display of the image frame to be displayed.

[0077] However, with the popularization of mini-LED BLU systems, the number of blocks divided in the BLU is increasing. For a block in the BLU, its dimming brightness is determined based on the pixel data included in the image partition corresponding to the block in the image frame to be displayed. Therefore, when there are more blocks divided in the BLU, there will be a phenomenon that the number of pixels corresponding to each block is non-integer.

[0078] In the UHD display device, for example, the BLU on the backlight panel is divided into 100×100 blocks, as shown in Table 2 below, which is the number of pixels corresponding to each block:

[0079]

[0080] Table 2

[0081] As shown in Table 2, in the above example, one block corresponds to 38.4×21.6 pixels. If the pixel data corresponding to the determined 38.4×21.6 pixels is used to determine the dimming data corresponding to the block, the ideal dimming data can be generated. However, in actual applications, the dimming data is calculated using the hardware ASIC, and due to the semiconductor characteristics of the hardware, it cannot be calculated using a fractional number of pixel data.

[0082] Of course, if the performance of the hardware ASIC is improved so that it can support data calculations on a decimal order, it is indeed possible to achieve more ideal dimming data determination. However, this will lead to an increase in hardware design costs and a corresponding increase in the size of the ASIC, thereby increasing product costs and reducing product market competitiveness. This result is not expected.

[0083] Therefore, in the process of hardware ASIC generating dimming data corresponding to the backlight partition, the following methods are usually used:

[0084] Take a block corresponding to 38.4×21.6 pixels as an example. Theoretically, a block corresponds to 38.1 pixels in the horizontal direction and 21.6 pixels in the vertical direction. In order to facilitate the calculation of the hardware ASIC, the decimal number of pixels is rounded up, so that it can be determined that the block corresponds to 39 pixels in the horizontal direction and 22 pixels in the vertical direction; and the decimal number of pixels is rounded down, so that it can be determined that the block corresponds to 38 pixels in the horizontal direction and 21 pixels in the vertical direction. Therefore, a block can correspond to 38 pixels or 39 pixels in the horizontal direction; and can correspond to 21 pixels or 22 pixels in the vertical direction.

[0085] Figure 1 A schematic diagram showing the correspondence between a block and the number of pixels is shown. Figure 1 As shown, take 4 blocks, namely block 1 to block 4, as an example, where:

[0086] Block 1 corresponds to 38 pixels in the horizontal direction and 22 pixels in the vertical direction, that is, the number of pixels corresponding to block 1 is 38×22. The dimming data corresponding to block 1 can be determined using the pixel data corresponding to the 38×22 pixels.

[0087] Block 2 corresponds to 39 pixels in the horizontal direction and 22 pixels in the vertical direction, that is, the number of pixels corresponding to block 2 is 39×22. The dimming data corresponding to block 2 can be determined using the pixel data corresponding to the 39×22 pixels.

[0088] Block 3 corresponds to 38 pixels in the horizontal direction and 21 pixels in the vertical direction, that is, the number of pixels corresponding to block 3 is 38×21. The dimming data corresponding to block 3 can be determined using the pixel data corresponding to the 38×21 pixels.

[0089] Block 4 corresponds to 39 pixels in the horizontal direction and 21 pixels in the vertical direction, that is, the number of pixels corresponding to block 4 is 39×21. The dimming data corresponding to block 4 can be determined using the pixel data corresponding to the 39×21 pixels.

[0090] Taking the UHD display device as an example, the BLU on the backlight panel is divided into 272×272 blocks. The theoretical number of pixels corresponding to one block is 14.1×7.9, that is, in the horizontal direction, the block can correspond to 14 pixels or 15 pixels, and in the vertical direction, the block can correspond to 7 pixels or 8 pixels. As shown in Table 3 below, the number of pixels corresponding to the 272 blocks in the horizontal direction is:

[0091]

[0092] Table 3

[0093] That is, among the 272 blocks arranged in the horizontal direction, blocks 1 to 208 correspond to 14 pixels in the horizontal direction. However, starting from block 209, the number of pixels corresponding to the following multiple blocks in the horizontal direction is composed of 14 and 15 interlaced, as shown in Table 3, block 209 corresponds to 15 pixels in the horizontal direction, block 210 corresponds to 14 pixels in the horizontal direction, block 211 corresponds to 15 pixels in the horizontal direction, block 212 corresponds to 14 pixels in the horizontal direction, and so on. Of course, the pixel composition corresponding to the 272 blocks arranged in the vertical direction is similar to that in the horizontal direction, so it will not be repeated.

[0094] In the above-mentioned pixel composition method, the number of pixels corresponding to the block in the BLU corresponding to the left part of the display panel is fixed, while the number of pixels corresponding to the block in the BLU corresponding to the right part of the display panel is constantly changing. Then, as the pixels in the display panel are turned on in sequence according to a preset order, adjacent blocks in the BLU will light up at the same time, which will cause visual problems such as afterimages and halos on the displayed screen. Especially when displaying dynamic images, the afterimage problem is particularly obvious.

[0095] Figure 2 A schematic diagram showing the corresponding relationship between pixel opening and block backlight lighting is shown. Figure 2 As shown in (a), at time 1, pixel area 1 is turned on on the display panel, and pixel area 1 is composed of 14×4 pixels. Block 1 corresponding to pixel area 1 on the backlight panel turns on the backlight accordingly, while other blocks (for example, block 2, block 3, ..., block i...) do not turn on the backlight;

[0096] like Figure 2 As shown in (b), at time 2 (time 2 is the next time of time 1), pixel area 2 is turned on on the display panel, and pixel area 2 is also composed of 14×4 pixels. Block 2 corresponding to pixel area 2 on the backlight panel turns on the backlight accordingly, while other blocks (for example, block 1, block 3, ..., block i...) do not turn on the backlight;

[0097] like Figure 2 As shown in (c), at time 3 (time 3 is the next time of time 2), pixel area 3 is turned on on the display panel. Pixel area 3 is also composed of 14×4 pixels. At this time, there are two blocks corresponding to pixel area 3 on the backlight panel, namely block 2 and block 3. Therefore, the backlight of block 2 and block 3 will be turned on at the same time, thereby presenting an afterimage phenomenon caused by pixel movement on the display screen, which seriously affects the display effect and the user's visual experience.

[0098] Based on this, the embodiments of the present invention provide a backlight control method, a display chip and a display device to limit and locate the number of pixels corresponding to each backlight partition, reduce the probability of two adjacent backlight partitions turning on the backlight at the same time, thereby alleviating the visual problems of afterimages and halos on the display screen, improve display quality, and optimize display performance.

[0099] The purpose, features and advantages of the present invention will be further described in conjunction with the embodiments and with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0100] The following is an introduction to the application scenarios of the backlight control method provided by the present invention in conjunction with the accompanying drawings:

[0101] The backlight control method provided by the embodiment of the present invention can be applied to various application scenarios of display devices. Figure 3 A schematic diagram showing an application scenario of a backlight control method provided by an embodiment of the present invention is shown. Figure 3 As shown, the application scenario includes a display device 10; the display device 10 includes a backlight panel 110 and a display panel 120 that are relatively arranged, the backlight panel 110 is divided into a plurality of backlight partitions 111, a backlight partition 111 includes a plurality of backlight sources (not shown in the figure), the backlight partition 111 corresponds to an image partition 121 on the display panel 120, an image partition 121 includes a plurality of pixels, and based on the pixel data of the plurality of pixels, the dimming data of the backlight partition 111 corresponding to the image partition 121 can be determined, so that the backlight partition 111 controls the backlight source therein to emit backlight of corresponding brightness according to the dimming data.

[0102] The number of pixels included in the image partition 121 corresponding to each backlight partition 111 and the corresponding dimming data are determined by the backlight control method provided by the embodiment of the present invention.

[0103] Exemplarily, the display device 10 in the embodiment of the present invention can be a smart terminal, a smart mobile terminal, a tablet computer, a laptop computer, a smart handheld device, a personal computer (English: Personal Computer, PC for short), a computer, a smart screen, a display device, a vehicle-mounted device, various wearable devices, a personal digital assistant (English: Personal Digital Assistant, PDA for short), etc.; among which, wearable devices such as virtual reality VR (English: Virtual Reality, VR for short) devices, augmented reality (English: Augmented Reality, AR for short) devices, etc.

[0104] Of course, the device provided in the embodiment of the present invention is not limited to Figure 3 The application scenarios shown in the figure can also be used in other possible application scenarios, which are not limited by the embodiments of the present invention. Figure 3 The functions that can be realized by each part of the application scenario shown will be described in subsequent embodiments, and will not be described in detail here.

[0105] After introducing the application scenarios of the embodiments of the present invention, the preferred implementation modes of the present invention are further described in detail below in conjunction with the accompanying drawings. It should be understood that the preferred embodiments described herein are only used to illustrate and explain the present invention, and are not used to limit the present invention. In addition, the embodiments of the present invention and the features in the embodiments may be combined with each other if there is no conflict.

[0106] The backlight control method provided by the embodiment of the present invention is specifically described below with reference to the accompanying drawings:

[0107] Figure 4 A schematic diagram of the workflow of a backlight control method is shown. It should be noted that the backlight control method provided in the embodiment of the present invention can be applied in a system on chip (SoC), a timing controller (TCON), or other display chips, such as a screen drive circuit chip, etc. The embodiment of the present invention does not impose any restrictions on this.

[0108] like Figure 4 As shown, the method specifically comprises the following steps:

[0109] Step S401 : determining quantity-related information according to the number of pixels corresponding to the image frame to be displayed and the number of backlight subareas divided on the backlight panel.

[0110] In some embodiments, quantity-related information includes quantity information corresponding to the row direction, and quantity information corresponding to the column direction, wherein the quantity information corresponding to the row direction includes the first pixel number, the second pixel number, the total number of backlight partitions corresponding to the first pixel number, and the total number of backlight partitions corresponding to the second pixel number; the quantity information corresponding to the column direction includes the third pixel number, the fourth pixel number, the total number of backlight partitions corresponding to the third pixel number, and the total number of backlight partitions corresponding to the fourth pixel number.

[0111] In some embodiments, in the process of determining quantity-related information by executing step S401, such as Figure 5 As shown, the following steps may be specifically included:

[0112] Step S401-1, according to the ratio of the number of pixels corresponding to the image frame to be displayed to the number of backlight partitions, determine the initial number of pixels corresponding to each backlight partition, wherein the initial number of pixels includes the number of row pixels and the number of column pixels, wherein the number of row pixels and the number of column pixels are both non-integer.

[0113] In a specific implementation, the number of pixels corresponding to the image frame to be displayed is related to the resolution of the image frame to be displayed. For example, for an image frame to be displayed with a resolution of 3840×2160, the number of pixels corresponding to the image frame to be displayed is also 3840×2160. The number of row pixels corresponding to the backlight partition can be determined according to the ratio of the number of pixels in a row of pixels in the image frame to be displayed to the number of backlight partitions in a row, and the number of column pixels corresponding to the backlight partition can be determined according to the ratio of the number of pixels in a column of pixels in the image frame to be displayed to the number of backlight partitions in a column.

[0114] For example, assuming that the number of pixels corresponding to the image frame to be displayed is 3840×2160, and 272×272 backlight partitions are set on the backlight panel, the initial number of pixels corresponding to each backlight partition is (3840 / 272)×(2160 / 272)=14.1×7.9, wherein the number of row pixels corresponding to a backlight partition is 14.1, and the number of column pixels is 7.9.

[0115] Step S401-2: determining the first pixel number and the second pixel number included in the quantity-related information based on the row pixel number, and determining the third pixel number and the fourth pixel number included in the quantity-related information based on the column pixel number.

[0116] In a specific implementation, the number of row pixels can be rounded down to obtain a first number of pixels, and the number of row pixels can be rounded up to obtain a second number of pixels; similarly, the number of column pixels can be rounded down to obtain a third number of pixels, and the number of column pixels can be rounded up to obtain a fourth number of pixels.

[0117] For example, assuming that a backlight partition corresponds to 14.1×7.9 pixels, the row pixel number 14.1 corresponding to the backlight partition is rounded down, and the obtained first pixel number is 14, and the row pixel number 14.1 corresponding to the backlight partition is rounded up, and the obtained second pixel number is 15; the column pixel number 7.9 corresponding to the backlight partition is rounded down, and the obtained third pixel number is 7, and the column pixel number 7.9 corresponding to the backlight partition is rounded up, and the obtained fourth pixel number is 8.

[0118] Step S401 - 3 : determining the total number of backlight partitions corresponding to each number of pixels according to the number of pixels and the number of backlight partitions included in the number-related information.

[0119] In a specific implementation, for each backlight partition arranged along the row direction, on the one hand, the total number of these backlight partitions is a fixed value, and the sum of the number of pixels corresponding to these backlight partitions along the row direction is equal to the number of pixels in a row of pixels in the image frame to be displayed; on the other hand, it can be seen from step S401-2 that the number of pixels corresponding to the backlight partitions along the row direction can be the first number of pixels or the second number of pixels; therefore, according to the above conditions, the total number of backlight partitions corresponding to the first number of pixels along the row direction and the total number of backlight partitions corresponding to the second number of pixels along the row direction can be determined.

[0120] For example, 272×272 backlight partitions are set on the backlight panel, that is, 272 backlight partitions are arranged along the row direction, and the number of pixels corresponding to each backlight partition along the row direction can be the first number of pixels 14, or the second number of pixels 15. Therefore, it can be set that there are x backlight partitions corresponding to the first number of pixels 14 along the row direction, and there are (272-x) backlight partitions corresponding to the second number of pixels 15 along the row direction, then the following limiting conditions exist:

[0121] 14×x+15×(272-x)=3840;

[0122] Through the above formula, it can be determined that the number of backlight partitions corresponding to 14 pixels along the row direction is 240, and the number of backlight partitions corresponding to 15 pixels along the row direction is 32.

[0123] For each backlight partition arranged along the column direction, the method of determining the total number of backlight partitions corresponding to the third number of pixels along the column direction and the total number of backlight partitions corresponding to the fourth number of pixels along the column direction is similar to the above method, so it can be referred to the above implementation method and will not be repeated here.

[0124] Taking the case where the image frame to be displayed corresponds to 3840×2160 pixels and 272×272 backlight partitions are set on the backlight panel as an example, through the above steps S401-1 to S401-3, the quantity-related information shown in the following table can be determined:

[0125]

[0126] Table 4

[0127] In the above embodiment, when the initial pixel number determined according to the number of pixels corresponding to the image frame to be displayed and the number of backlight partitions is a decimal, multiple integer pixel numbers are determined according to the decimal initial pixel number, namely the first pixel number, the second pixel number, the third pixel number and the fourth pixel number, and the size of the image partition corresponding to each backlight partition is determined by using the determined multiple integer pixel numbers, and the dimming data of the backlight partition is determined according to the pixel data included in the determined image partition. In this way, the hardware does not need to support the calculation of decimals, and the calculation of the dimming data of the backlight partition can also be realized. Therefore, the hardware design cost and hardware size can be reduced, thereby reducing product costs and improving market competitiveness.

[0128] After the quantity-related information is determined, the quantity-related information can be used to locate the number of pixels corresponding to each backlight partition, as follows:

[0129] Step S402, based on quantity-related information, multiple target areas are determined in the backlight panel, wherein one target area includes multiple backlight partitions, the number of pixels corresponding to each backlight partition belonging to the same target area is the same, and the number of pixels corresponding to the backlight partitions in any two adjacent target areas is different.

[0130] Figure 6 A schematic diagram showing the distribution of target areas on a backlight panel is shown in FIG. Figure 6 As shown, a plurality of target areas are determined in the backlight panel, namely, target area 11, target area 12, target area 13, ..., target area 21, target area 22, target area 23, ..., and each target area includes a plurality of backlight partitions.

[0131] For example, assuming that backlight partitions 11 to 13 belong to target area 11, and backlight partitions 14 to 19 belong to target area 12, then the number of pixels corresponding to backlight partitions 11 to 13 are the same, the number of pixels corresponding to backlight partitions 14 to 19 are the same, and the number of pixels corresponding to backlight partition 13 is different from the number of pixels corresponding to backlight partition 14.

[0132] In some embodiments, the determined multiple target areas may be arranged in an N×M array on the backlight panel, where M and N are both positive integers greater than 1. Specifically, N rows and M columns of target areas may be determined on the backlight panel, where the first row includes target area 11 to target area 1M, the second row includes target area 21 to target area 2M, and so on, and the last row includes target area N1 to target area NM.

[0133] It should be noted that M and N may be equal or unequal, and may be flexibly set according to actual business requirements, and the embodiment of the present invention does not impose any restrictions on this. For example, three target areas may be determined along the row direction, and nine target areas may be determined along the column direction.

[0134] In some embodiments, among the M target areas arranged along the row direction, the backlight subareas in any two adjacent target areas have different numbers of pixels corresponding to them along the row direction, and the same number of pixels corresponding to them along the column direction.

[0135] Specifically, since the embodiment defines M target areas arranged along the row direction, the two adjacent target areas in the embodiment are two adjacent target areas along the row direction. Figure 6 Target area 11 and target area 12 in the embodiment.

[0136] It can be known from the above embodiment that the quantity-related information includes the quantity information corresponding to the row direction: the first pixel number, the second pixel number, the total number of backlight partitions corresponding to the first pixel number, and the total number of backlight partitions corresponding to the second pixel number. Then, the following relationship also exists in the M target areas arranged along the row direction:

[0137] In some embodiments, among the M target areas arranged along the row direction, the number of pixels corresponding to the backlight partition included in the kth target area along the row direction is a first number of pixels, and the number of pixels corresponding to the backlight partition included in the k+1th target area along the row direction is a second number of pixels, wherein 1≤k≤M-1.

[0138] Figure 7 One of the schematic diagrams of the method for defining a target area in a backlight panel provided by an embodiment of the present invention is shown.

[0139] For example, three target areas are determined along the row direction on the backlight panel. Figure 7 As shown, in the three target areas (target area 11 to target area 13) included in the first row, the number of pixels corresponding to the backlight partition included in the target area 11 along the row direction can be the first number of pixels, and the number of pixels corresponding to the backlight partition included in the target area 12 along the row direction becomes the second number of pixels; the number of pixels corresponding to the backlight partition included in the target area 13 along the row direction becomes back to the first number of pixels.

[0140] Figure 8 The second schematic diagram shows a method for defining a target area in a backlight panel provided by an embodiment of the present invention.

[0141] Still taking the case where three target areas are determined along the row direction on the backlight panel as an example, Figure 8As shown, in the three target areas (target area 11 to target area 13) included in the first row, the number of pixels corresponding to the backlight partition included in the target area 11 along the row direction can be the second number of pixels, and the number of pixels corresponding to the backlight partition included in the target area 12 along the row direction becomes the first number of pixels; the number of pixels corresponding to the backlight partition included in the target area 13 along the row direction becomes back to the second number of pixels.

[0142] Fig. 9 A third schematic diagram of a method for defining a target area in a backlight panel provided by an embodiment of the present invention is shown.

[0143] like Fig. 9 As shown, 13 target areas are determined on the backlight panel, wherein, in the 13 target areas included in the first row (target area 11~target area 1(13)), the number of pixels corresponding to the backlight partition included in the target area 11 along the row direction is the first number of pixels; the number of pixels corresponding to the backlight partition included in the target area 12 along the row direction is changed to the second number of pixels; the number of pixels corresponding to the backlight partition included in the target area 13 along the row direction is changed back to the first number of pixels; the number of pixels corresponding to the backlight partition included in the target area 14 along the row direction is changed to the second number of pixels; and so on.

[0144] Therefore, by Figure 6~Figure 8 It can be seen from the example that, for any target area among the M target areas arranged along the row direction, the number of pixels corresponding to the backlight partition along the row direction can be set as the first number of pixels, and the number of pixels corresponding to the backlight partition along the row direction in the target area adjacent to the target area can be set as the second number of pixels, so that the backlight partitions corresponding to different numbers of pixels along the row direction are alternately arranged at intervals in units of areas, rather than the existing structure of alternating one by one. Such a setting method can, on the one hand, effectively reduce the probability of the adjacent backlight partitions being lit at the same time, thereby reducing the visual afterimages, halos and other phenomena presented on the display screen, and improving the display effect; on the other hand, it can also effectively ensure the coordination and uniformity of the overall display brightness of the display screen, and improve the display quality of the screen.

[0145] In addition, it should be noted that the above Figure 6~Figure 8 This is only an exemplary description and should not impose any limitation on the present invention. In actual applications, the number of target areas set on the backlight panel and whether the number of pixels corresponding to the backlight partition of the first target area along the row direction is the first number of pixels or the second number of pixels can be flexibly set according to actual business needs, and the embodiment of the present invention does not impose any limitation on this.

[0146] In some embodiments, among the M target areas arranged along the row direction, the number of pixels corresponding to the backlight partition included in the first target area along the row direction is the same as the number of pixels corresponding to the backlight partition included in the Mth target area along the row direction.

[0147] In a specific implementation, the aforementioned embodiment defines backlight partitions corresponding to different numbers of pixels along the row direction, and they are alternately arranged at intervals in units of areas. When the numbers of pixels corresponding to the backlight partitions in the first target area and the Mth target area along the row direction are the same, it means that the backlight partitions corresponding to different numbers of pixels along the row direction, and the target areas to which they belong are symmetrically distributed.

[0148] For example, there are 7 (M=7) target areas arranged along the row direction on the backlight panel, namely, target area 11 to target area 17. The number of pixels corresponding to the backlight partitions in target area 11 and target area 17 along the row direction is the same, the number of pixels corresponding to the backlight partitions in target area 12 and target area 16 along the row direction is the same, and so on. In this way, the number of row pixels corresponding to the backlight partitions in the 7 target areas arranged along the row direction can be "the first number of pixels, the second number of pixels, the first number of pixels, the second number of pixels, the first number of pixels, the second number of pixels, the first number of pixels, the second number of pixels, the first number of pixels".

[0149] like Figure 7 As shown, the number of pixels corresponding to the backlight partitions in the target area 11 along the row direction and the number of pixels corresponding to the backlight partitions in the target area 13 along the row direction are both the first number of pixels, while the number of pixels corresponding to the backlight partitions in the target area 12 along the row direction is the second number of pixels.

[0150] Another example Figure 8 As shown, the number of pixels corresponding to the backlight partitions in the target area 11 along the row direction and the number of pixels corresponding to the backlight partitions in the target area 13 along the row direction are both the second number of pixels, while the number of pixels corresponding to the backlight partitions in the target area 12 along the row direction is the first number of pixels.

[0151] For example Fig. 9 As shown, the number of pixels corresponding to the backlight partitions in target area 11, target area 13, target area 15, target area 17, target area 19, target area 1(11) and target area 1(13) along the row direction is all the first number of pixels; the number of pixels corresponding to the backlight partitions in the remaining target area 12, target area 14, target area 16, target area 18, target area 1(10) and target area 1(12) along the row direction is all the second number of pixels.

[0152] In some embodiments, among the M target areas arranged along the row direction, the number of backlight partitions along the row direction included in the i-th target area is the same as the number of backlight partitions along the row direction included in the j-th target area, where 1≤i≤(M-1) / 2, and the sum of i and j is M+1.

[0153] In a specific implementation, on the basis of defining the backlight partitions corresponding to different numbers of pixels along the row direction in the aforementioned embodiment and setting them alternately at intervals in units of areas, it is also necessary to set the backlight partitions in two target areas at symmetrical positions with the same number along the row direction to ensure that in the two target areas at symmetrical positions, the backlight partitions correspond to the same number of pixels along the row direction and the number of backlight partitions along the row direction is also the same, so that the partitions of the target areas are completely symmetrical.

[0154] For example, still taking the example of 7 (M=7) target areas arranged along the row direction on the backlight panel, namely target area 11 to target area 17, then in target area 11 and target area 17, the number of pixels corresponding to the backlight partitions along the row direction is the first number of pixels, and in these two areas, a row includes a1 backlight partitions; in target area 12 and target area 16, the number of pixels corresponding to the backlight partitions along the row direction is the second number of pixels, and in these two areas, a row includes a2 backlight partitions; in target area 13 and target area 15, the number of pixels corresponding to the backlight partitions along the row direction is the first number of pixels, and in these two areas, a row includes a3 backlight partitions, and so on.

[0155] Since the number of backlight partitions corresponding to 14 (the first number of pixels) pixels along the row direction determined in the quantity-related information is 240, and the number of backlight partitions corresponding to 15 (the second number of pixels) pixels is 32, therefore, in a feasible implementation, the backlight partition corresponding to 14 pixels may be divided into two areas, then a row in one target area includes 120 backlight partitions, and the backlight partition corresponding to 15 pixels is centered, as follows:

[0156] like Figure 7 As shown, in the target area 11, a row includes 120 backlight partitions, and the number of pixels corresponding to each backlight partition along the row direction is the first number of pixels; in the target area 12, a row includes 32 backlight partitions, and the number of pixels corresponding to each backlight partition along the row direction is the second number of pixels; in the target area 13, a row also includes 120 backlight partitions, and the number of pixels corresponding to each backlight partition along the row direction is also the first number of pixels.

[0157] In another feasible implementation, the backlight partition corresponding to 15 pixels may be divided into two areas, then one row in one target area includes 16 backlight partitions, and the backlight partition corresponding to 14 pixels is centered, as follows:

[0158] like Figure 8 As shown, in the target area 11, a row includes 16 backlight partitions, and the number of pixels corresponding to each backlight partition along the row direction is the second number of pixels; in the target area 12, a row includes 240 backlight partitions, and the number of pixels corresponding to each backlight partition along the row direction is the first number of pixels; in the target area 13, a row also includes 16 backlight partitions, and the number of pixels corresponding to each backlight partition along the row direction is also the second number of pixels.

[0159] Of course, according to the total number of backlight partitions corresponding to different numbers of pixels along the row direction determined in the quantity-related information, other methods of defining target areas can also be determined, and the embodiments of the present invention do not impose any restrictions on this. For example, 9 target areas are set along the row direction, wherein, in target area 11, target area 13, target area 15, target area 17 and target area 19, one row includes 48 backlight partitions, and one backlight partition corresponds to 14 pixels along the row direction; in target area 12, target area 14, target area 16 and target area 18, one row includes 8 backlight partitions, and one backlight partition corresponds to 15 pixels along the row direction.

[0160] Therefore, in the entire display panel, the number of pixels corresponding to the backlight partitions will be evenly and symmetrically distributed in units of regions. This setting method enables each target area to include at least two backlight partitions along the row direction. When the backlight is turned on following the opening of the pixel area on the display panel, the backlight partitions in the same target area will turn on the backlight in sequence according to the opening order of the pixel area, that is, the backlight partitions in the same target area will not be turned on at the same time. In this way, the probability of turning on the backlight of two adjacent backlight partitions at the same time can be effectively reduced, thereby reducing the visual problems of afterimages and halos on the display screen, improving display quality, and optimizing display performance. In addition, the multiple target areas determined are symmetrically distributed, which can ensure the coordination and uniformity of the overall display brightness of the display screen, effectively improving the display quality of the screen.

[0161] After introducing the setting method of the backlight partitions along the row direction, the setting method of the backlight partitions along the column direction is introduced below:

[0162] In some embodiments, among the N target areas arranged along the column direction, the backlight subareas in any two adjacent target areas have different numbers of pixels corresponding to them along the column direction, and the same number of pixels corresponding to them along the row direction.

[0163] Specifically, since the embodiment defines N target areas arranged along the column direction, the two adjacent target areas in the embodiment are two adjacent target areas along the column direction. Figure 6 Target area 11 and target area 21 in.

[0164] Taking the example of determining three target areas along the column direction on the backlight panel, namely target area 11 to target area 31, and assuming that backlight partitions 11 to 13 and backlight partitions 21 to 23 belong to target area 11, and backlight partitions 31 to 33 belong to target area 21, then the number of pixels corresponding to backlight partitions 11 to 13 and backlight partitions 21 to 23 along the column direction are the same, the number of pixels corresponding to backlight partitions 31 to 33 along the column direction are also the same, while the number of pixels corresponding to backlight partition 21 along the column direction is different from the number of pixels corresponding to backlight partition 31 along the column direction.

[0165] It can be known from the above embodiment that the quantity-related information includes the quantity information corresponding to the column direction: the number of third pixels, the number of fourth pixels, the total number of backlight partitions corresponding to the third number of pixels, and the total number of backlight partitions corresponding to the fourth number of pixels. Then, the following relationship also exists in the N target areas arranged along the column direction:

[0166] In some embodiments, among the N target areas arranged along the column direction, the number of pixels corresponding to the backlight partition included in the rth target area along the column direction is the third number of pixels, and the number of pixels corresponding to the backlight partition included in the r+1th target area along the column direction is the fourth number of pixels, wherein 1≤r≤N-1.

[0167] Fig.10 A fourth schematic diagram of a method for defining a target area in a backlight panel provided by an embodiment of the present invention is shown.

[0168] For example, three target areas are determined along the column direction on the backlight panel. Fig.10 As shown, in the three target areas (target area 11, target area 21 and target area 31) included in the first column, the number of pixels corresponding to the backlight partition included in the target area 11 along the column direction can be the third number of pixels, then the number of pixels corresponding to the backlight partition included in the target area 21 along the column direction becomes the fourth number of pixels; the number of pixels corresponding to the backlight partition included in the target area 31 along the column direction becomes back to the third number of pixels.

[0169] Therefore, if Fig.10As shown, the number of pixels corresponding to the backlight partition included in the target area 11 is: the first number of pixels × the third number of pixels (such as 14×7); the number of pixels corresponding to the backlight partition included in the target area 21 is: the first number of pixels × the fourth number of pixels (such as 14×8); the number of pixels corresponding to the backlight partition included in the target area 31 is: the first number of pixels × the third number of pixels.

[0170] The above-mentioned setting method can ensure that the target area to which the backlight partition corresponding to the third number of pixels along the column direction belongs is alternately arranged with the target area to which the backlight partition corresponding to the fourth number of pixels along the column direction belongs. In this way, on the one hand, the probability of the adjacent backlight partitions being lit at the same time can be effectively reduced, thereby reducing the visual afterimage, halo and other phenomena presented by the display screen, and improving the display effect; on the other hand, it can also effectively ensure the coordination and uniformity of the overall display brightness of the display screen, and improve the display quality of the picture.

[0171] In some embodiments, among the N target areas arranged along the column direction, the number of pixels corresponding to the backlight partition included in the first target area along the column direction is the same as the number of pixels corresponding to the backlight partition included in the Nth target area along the column direction.

[0172] In a specific implementation, the aforementioned embodiment defines backlight partitions corresponding to different numbers of pixels along the column direction, and they are alternately arranged at intervals in units of areas. When the numbers of pixels corresponding to the backlight partitions in the first target area and the Nth target area along the column direction are the same, it means that the backlight partitions corresponding to different numbers of pixels along the column direction, and the target areas to which they belong are symmetrically distributed.

[0173] For example, there are 9 (N=9) target areas arranged along the column direction on the backlight panel, namely, target area 11 to target area 91. The number of pixels corresponding to the backlight partitions in target area 11 and target area 91 along the row direction is the same, the number of pixels corresponding to the backlight partitions in target area 21 and target area 81 along the row direction is the same, and so on. In this way, the number of column pixels corresponding to the backlight partitions in the 9 target areas arranged along the column direction can be "the third number of pixels, the fourth number of pixels, the third number of pixels, the fourth number of pixels, ..., the third number of pixels, the fourth number of pixels, the third number of pixels".

[0174] like Fig.10 As shown, the number of pixels corresponding to the backlight partition in the target area 11 along the column direction and the number of pixels corresponding to the backlight partition in the target area 31 along the column direction are both the third number of pixels, while the number of pixels corresponding to the backlight partition in the target area 21 along the column direction is the fourth number of pixels.

[0175] In some embodiments, among the N target areas arranged along the column direction, the number of backlight partitions included in the p-th target area along the row direction is the same as the number of backlight partitions included in the q-th target area along the row direction, where 1≤p≤(N-1) / 2, and the sum of p and q is N+1.

[0176] In a specific implementation, on the basis of defining the backlight partitions corresponding to different numbers of pixels along the column direction in the aforementioned embodiment and setting them alternately at intervals in units of areas, it is also necessary to set the backlight partitions in two target areas at symmetrical positions so that the numbers along the column direction are the same, so as to ensure that in the two target areas at symmetrical positions, the backlight partitions correspond to the same number of pixels along the column direction and the number of backlight partitions along the column direction is also the same, so that the partitions of the target areas are completely symmetrical.

[0177] According to the quantity-related information, the number of backlight partitions corresponding to 7 (the third number of pixels) pixels along the column direction is 16, and the number of backlight partitions corresponding to 8 (the fourth number of pixels) pixels is 256. Therefore, in a feasible implementation, the backlight partition corresponding to 7 pixels can be divided into two areas, and a row in a target area includes 8 backlight partitions, and the backlight partition corresponding to 8 pixels is centered, as follows:

[0178] like Fig.10 As shown, in the target area 11, one column includes 8 backlight partitions, and the number of pixels corresponding to each backlight partition along the row direction is the third number of pixels; in the target area 21, one column includes 256 backlight partitions, and the number of pixels corresponding to each backlight partition along the row direction is the fourth number of pixels; in the target area 31, one column also includes 8 backlight partitions, and the number of pixels corresponding to each backlight partition along the row direction is also the third number of pixels.

[0179] certainly, Fig.10 The target area definition method shown is only an example and should not limit the embodiments of the present invention.

[0180] When the number of pixels corresponding to the backlight partition is set as above, for a target area, since the number of pixels corresponding to the backlight partition along the row direction and along the column direction are the same, when the backlight of the corresponding backlight partition is turned on following the opening of the pixel area on the display panel, each backlight partition in the target area will turn on the backlight in sequence according to the opening order of the pixel area, and the situation where two adjacent backlight partitions turn on the backlight at the same time will not occur. In this way, during the entire display process, the probability of two adjacent backlight partitions turning on the backlight at the same time will be greatly reduced, thereby effectively alleviating the visual problems of afterimages and halos presented by the display screen, improving display quality, and optimizing display performance. In addition, since the target areas corresponding to the backlight partitions with different numbers of pixels along the column direction are evenly alternating and symmetrically distributed, the coordination and uniformity of the overall display brightness of the display screen can be ensured, effectively improving the display quality of the screen.

[0181] Step S403 , for any target area, according to the number of pixels corresponding to the backlight partition in the target area and the pixel data included in the image partition determined in the image frame to be displayed, generates dimming data corresponding to the backlight partition.

[0182] In the backlight control method provided by an embodiment of the present invention, multiple target areas are determined on the backlight panel based on quantity-related information determined by the number of pixels corresponding to the image frame to be displayed and the number of backlight partitions; each target area includes multiple backlight partitions, and the number of pixels corresponding to each backlight partition in a target area is the same, and the number of pixels corresponding to the backlight partitions in two adjacent target areas is different.

[0183] When the number of pixels corresponding to the backlight partition is set as above, for a target area, since the number of pixels corresponding to the backlight partitions therein are the same, when the backlight of the corresponding backlight partition is turned on following the opening of the pixel area on the display panel, each backlight partition in the target area will turn on the backlight in sequence according to the opening sequence of the pixel area, thus avoiding the probability of turning on the backlight of two adjacent backlight partitions at the same time, thereby reducing the visual problems of afterimage, halo, etc. presented on the display screen, improving the display quality, and optimizing the display performance.

[0184] Based on the same concept, an embodiment of the present invention further provides a display chip, which is applicable to the backlight control method provided in any of the above embodiments. Since the display chip is the display chip in the backlight control method in the embodiment of the present invention, and the principle of solving the problem by the display chip is similar to that of the backlight control method, the implementation of the display chip can refer to the implementation of the backlight control method, and the repeated parts will not be repeated.

[0185] like Fig.11As shown, the display chip 100 provided in the embodiment of the present invention may include:

[0186] The quantity information determination module 1001 is used to determine quantity-related information according to the number of pixels corresponding to the image frame to be displayed and the number of backlight partitions divided on the backlight panel;

[0187] The region determination module 1002 is used to determine multiple target regions in the backlight panel based on the quantity-related information, wherein one target region includes multiple backlight partitions, the number of pixels corresponding to the backlight partitions belonging to the same target region is the same, and the number of pixels corresponding to the backlight partitions in any two adjacent target regions is different;

[0188] The backlight value generating module 1003 is used to generate dimming data corresponding to the backlight partition in any target area according to the number of pixels corresponding to the backlight partition in the target area and the pixel data included in the image partition determined in the image frame to be displayed.

[0189] In an optional embodiment, the multiple target areas determined by the area determination module 1002 are arranged in an N×M array on the backlight panel, where M and N are both positive integers greater than 1;

[0190] In the M target areas arranged along the row direction, the backlight subareas in any two adjacent target areas have different numbers of pixels corresponding to them along the row direction, and the same number of pixels corresponding to them along the column direction;

[0191] In the N target areas arranged along the column direction, the backlight subareas in any two adjacent target areas have different numbers of pixels corresponding to them along the column direction, and the same number of pixels corresponding to them along the row direction.

[0192] In some embodiments, the quantity-related information includes the first pixel quantity, the second pixel quantity, the total number of backlight subareas corresponding to the first pixel quantity, and the total number of backlight subareas corresponding to the second pixel quantity;

[0193] Among the M target areas arranged along the row direction, the number of pixels corresponding to the backlight partition included in the kth target area along the row direction is the first number of pixels, and the number of pixels corresponding to the backlight partition included in the k+1th target area along the row direction is the second number of pixels, wherein 1≤k≤M-1.

[0194] In some embodiments, among the M target areas arranged along the row direction, the number of pixels corresponding to the backlight partition included in the first target area along the row direction is the same as the number of pixels corresponding to the backlight partition included in the Mth target area along the row direction.

[0195] In some embodiments, among the M target areas arranged along the row direction, the number of backlight partitions along the row direction included in the i-th target area is the same as the number of backlight partitions along the row direction included in the j-th target area, where 1≤i≤(M-1) / 2, and the sum of i and j is M+1.

[0196] In some embodiments, the quantity-related information further includes a third pixel quantity, a fourth pixel quantity, a total number of backlight subareas corresponding to the third pixel quantity, and a total number of backlight subareas corresponding to the fourth pixel quantity;

[0197] Among the N target areas arranged along the column direction, the number of pixels corresponding to the backlight partition included in the rth target area along the column direction is the third number of pixels, and the number of pixels corresponding to the backlight partition included in the r+1th target area along the column direction is the fourth number of pixels, where 1≤r≤N-1.

[0198] In some embodiments, among the N target areas arranged along the column direction, the number of pixels corresponding to the backlight partition included in the first target area along the column direction is the same as the number of pixels corresponding to the backlight partition included in the Nth target area along the column direction.

[0199] In some embodiments, among the N target areas arranged along the column direction, the number of backlight partitions included in the p-th target area along the row direction is the same as the number of backlight partitions included in the q-th target area along the row direction, where 1≤p≤(N-1) / 2, and the sum of p and q is N+1.

[0200] In some embodiments, the quantity information determination module 1001 is specifically used to:

[0201] Determine the initial number of pixels corresponding to each backlight partition according to the ratio of the number of pixels corresponding to the image frame to be displayed to the number of backlight partitions, wherein the initial number of pixels includes the number of row pixels and the number of column pixels, wherein the number of row pixels and the number of column pixels are both non-integers;

[0202] Determine, based on the number of row pixels, a first number of pixels and a second number of pixels included in the number-related information, and determine, based on the number of column pixels, a third number of pixels and a fourth number of pixels included in the number-related information;

[0203] According to the quantity-related information including the quantity of each pixel and the number of backlight partitions, the total number of backlight partitions corresponding to each pixel number is determined.

[0204] Based on the same concept, an embodiment of the present invention further provides a display device, which includes a backlight panel, a display panel, a backlight control chip, and a display chip provided in any of the above embodiments. The principle of solving the problem by the display device is similar to that of the above display chip, so the implementation of the display device can refer to the implementation of the above display chip, and the repeated parts will not be repeated.

[0205] like Fig.12 As shown, the display device 10 may include a backlight panel 110, a display panel 120, a backlight control chip 130 and a display chip 100, wherein:

[0206] The display chip 100 is electrically connected to the backlight control chip 130 and the display panel 120 respectively, and the backlight control chip 130 is also electrically connected to the backlight panel 110; a plurality of pixels are arrayed on the display panel 120, and a plurality of backlight partitions are divided on the backlight panel 110, and the display panel 120 and the backlight panel 110 are arranged relative to each other.

[0207] In specific implementation, the display chip 100 in the embodiment of the present invention may adopt SoC or TCON. In addition, other essential components of the display device are well understood by those skilled in the art and will not be described in detail here, nor should they be used as limitations to the present invention.

[0208] Although the preferred embodiments of the present invention have been described, those skilled in the art may make other changes and modifications to these embodiments once they have learned the basic creative concept. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments and all changes and modifications that fall within the scope of the present invention.

[0209] Obviously, those skilled in the art can make various changes and modifications to the present invention without departing from the spirit and scope of the present invention. Thus, if these modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include these modifications and variations.

Claims

1. A backlight control method, characterized in that: include: Determine quantity-related information according to the number of pixels corresponding to the image frame to be displayed and the number of backlight partitions divided on the backlight panel; Based on the quantity-related information, a plurality of target areas are determined in the backlight panel, wherein one target area includes a plurality of backlight partitions, the number of pixels corresponding to the backlight partitions belonging to the same target area is the same, and the number of pixels corresponding to the backlight partitions in any two adjacent target areas is different; For any target area, according to the number of pixels corresponding to the backlight partition in the target area and the pixel data included in the image partition determined in the image frame to be displayed, generate dimming data corresponding to the backlight partition; Among them, the multiple target areas are arranged in an N×M array on the backlight panel, and M and N are both positive integers greater than 1; among the M target areas arranged along the row direction, the number of pixels corresponding to the backlight partitions in any two adjacent target areas along the row direction is different, and the number of pixels corresponding to the backlight partitions in the column direction is the same; among the N target areas arranged along the column direction, the number of pixels corresponding to the backlight partitions in any two adjacent target areas along the column direction is different, and the number of pixels corresponding to the backlight partitions in the row direction is the same.

2. The method according to claim 1, characterized in that The quantity-related information includes the first pixel number, the second pixel number, the total number of backlight subareas corresponding to the first pixel number, and the total number of backlight subareas corresponding to the second pixel number; Among the M target areas arranged along the row direction, the number of pixels corresponding to the backlight partition included in the kth target area along the row direction is the first number of pixels, and the number of pixels corresponding to the backlight partition included in the k+1th target area along the row direction is the second number of pixels, wherein 1≤k≤M-1.

3. The method according to claim 2, characterized in that In the M target areas arranged along the row direction, the number of pixels corresponding to the backlight partitions included in the first target area along the row direction is the same as the number of pixels corresponding to the backlight partitions included in the Mth target area along the row direction.

4. The method according to claim 1, characterized in that Among the M target areas arranged along the row direction, the number of backlight partitions along the row direction included in the i-th target area is the same as the number of backlight partitions along the row direction included in the j-th target area, wherein 1≤i≤(M-1) / 2, and the sum of i and j is M+1.

5. The method according to claim 1, characterized in that The quantity-related information further includes a third pixel quantity, a fourth pixel quantity, a total number of backlight subareas corresponding to the third pixel quantity, and a total number of backlight subareas corresponding to the fourth pixel quantity; Among the N target areas arranged along the column direction, the number of pixels corresponding to the backlight partition included in the rth target area along the column direction is the third number of pixels, and the number of pixels corresponding to the backlight partition included in the r+1th target area along the column direction is the fourth number of pixels, wherein 1≤r≤N-1.

6. The method according to claim 5, characterized in that In the N target areas arranged along the column direction, the number of pixels corresponding to the backlight partitions included in the first target area along the column direction is the same as the number of pixels corresponding to the backlight partitions included in the Nth target area along the column direction.

7. The method according to claim 1, characterized in that Among the N target areas arranged along the column direction, the number of backlight partitions included in the p-th target area along the row direction is the same as the number of backlight partitions included in the q-th target area along the row direction, wherein 1≤p≤(N-1) / 2, and the sum of p and q is N+1.

8. The method according to any one of claims 1 to 7, characterized in that Determining the quantity-related information according to the number of pixels corresponding to the image frame to be displayed and the number of backlight partitions divided on the backlight panel includes: Determine the initial number of pixels corresponding to each backlight partition according to the ratio of the number of pixels corresponding to the image frame to be displayed to the number of the backlight partitions, wherein the initial number of pixels includes the number of row pixels and the number of column pixels, wherein the number of row pixels and the number of column pixels are both non-integers; Determine, based on the number of row pixels, a first number of pixels and a second number of pixels included in the number-related information, and determine, based on the number of column pixels, a third number of pixels and a fourth number of pixels included in the number-related information; According to the number of each pixel included in the number-related information and the number of the backlight subareas, the total number of backlight subareas corresponding to each number of pixels is determined.

9. A display chip, characterized in that: include: A quantity information determination module, used to determine quantity-related information according to the number of pixels corresponding to the image frame to be displayed and the number of backlight partitions divided on the backlight panel; A region determination module, configured to determine a plurality of target regions in the backlight panel based on the quantity-related information, wherein the number of pixels corresponding to the backlight subregions belonging to the same target region is the same, and the number of pixels corresponding to the backlight subregions in any two adjacent target regions is different; A backlight value generating module, for generating dimming data corresponding to the backlight partition for any target area according to the number of pixels corresponding to the backlight partition in the target area and the pixel data included in the image partition determined in the image frame to be displayed; Among them, the multiple target areas determined by the area determination module are arranged in an N×M array on the backlight panel, and M and N are both positive integers greater than 1; among the M target areas arranged along the row direction, the backlight partitions in any two adjacent target areas have different numbers of pixels corresponding to them along the row direction, and the same number of pixels corresponding to them along the column direction; among the N target areas arranged along the column direction, the backlight partitions in any two adjacent target areas have different numbers of pixels corresponding to them along the column direction, and the same number of pixels corresponding to them along the row direction.

10. A display device, characterized in that: The device comprises a display panel, a backlight panel, a backlight control chip and a display chip as claimed in claim 9, wherein: The display chip is electrically connected to the backlight control chip and the display panel respectively, and the backlight control chip is also electrically connected to the backlight panel; The display panel is arrayed with a plurality of pixels, the backlight panel is divided into a plurality of backlight partitions, and the display panel and the backlight panel are arranged opposite to each other.

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