Backlight partition driving smoothing method

Abstract

The invention provides a backlight partition driving smoothing method, which relates to the technical field of display, and comprises the following steps of: determining a brightness weight coefficient through the shape of a partition, and determining a compensation proportionality coefficient of each direction through the distances between the center of the partition and the center of an adjacent partition in three directions; according to the brightness weight coefficient, the partition brightness value, the compensation proportionality coefficient of each direction and the corresponding adjacent partition brightness, the updated partition brightness value is obtained through calculation, the process can effectively reduce the brightness sudden change phenomenon in backlight display, the uniformity and smoothness of image display are improved, the visual experience is optimized, and the user experience is improved. The problem that the impression experience is poor due to the fact that the brightness difference of an existing backlight partition is too large is solved, and the method and device are suitable for backlight partition brightness control.

Description

Technical Field

[0001] This invention relates to the field of display technology, and in particular to a method for smoothing backlight partition driving. Background Technology

[0002] With the development of display technology, more and more LCD TVs are adopting backlight local dimming technology. This technology individually adjusts the brightness of each backlight zone based on the image signal, making bright areas brighter and dark areas darker, thus reducing overall power consumption while improving picture contrast. However, when adjusting each zone individually, excessive differences in brightness between zones can easily lead to uneven image transitions and a reduced viewing experience. Summary of the Invention

[0003] The technical problem solved by this invention is to provide a method for smoothing backlight zone driving, which solves the problem of poor viewing experience caused by excessive brightness differences in existing backlight zones.

[0004] The technical solution adopted by this invention to solve the above-mentioned technical problems is a method for backlight partition driving smoothing, comprising the following steps:

[0005] S1. Obtain the horizontal and vertical pixels of the partition;

[0006] S2. Divide the smaller value of the horizontal and vertical pixels by the larger value to obtain the aspect ratio of the partition; determine the brightness weighting coefficient based on the aspect ratio of the partition.

[0007] S3. Determine the distances in three directions between the center of the partition and the center of the adjacent partition, and determine the compensation ratio coefficient for each direction based on the distances in the three directions.

[0008] S4. Calculate the updated partition brightness value based on the brightness weight coefficient, the original brightness value of the partition, the compensation ratio coefficient for each direction, and the original brightness value of the corresponding neighboring partition.

[0009] Furthermore, in S2, the brightness weighting coefficient is determined based on the aspect ratio of the partition, including: if the aspect ratio of the partition is less than 0.5, then... ;otherwise, ;in, This represents the brightness weighting coefficient. This represents the aspect ratio of the partition. A is a preset value, and the range of A is 1 ≥ A > 0.

[0010] Furthermore, in S3, the distances in the three directions include the horizontal distance, the vertical distance, and the diagonal distance. The formula for determining the compensation ratio coefficient for each direction based on the distances in the three directions is as follows: , , ,in, Indicates horizontal distance. Indicates the vertical distance. Indicates the distance in the diagonal direction. This represents the compensation ratio coefficient in the horizontal direction. This represents the compensation ratio coefficient in the vertical direction. This indicates the compensation ratio coefficient in the oblique direction.

[0011] Furthermore, in S4, the calculation formula is: ,in, This indicates the updated partition brightness value. Indicates the original brightness value of the partition. , , and This represents the original brightness values ​​of four diagonally adjacent zones. and This represents the original brightness values ​​of two adjacent partitions in a vertical direction. and This represents the original brightness values ​​of two adjacent horizontally spaced zones.

[0012] Furthermore, the method also includes: S5, calculating the brightness value of each non-edge location partition in turn to obtain the updated brightness value of each non-edge location partition.

[0013] The beneficial effects of this invention are as follows: This invention provides a method for smoothing backlight partition driving. The brightness weight coefficient is determined by the shape of the partition, and the compensation ratio coefficient in each direction is determined by the distance between the center of the partition and the center of the adjacent partition in three directions. The updated partition brightness value is calculated based on the brightness weight coefficient, the partition brightness value, the compensation ratio coefficient in each direction, and the corresponding brightness of the adjacent partition. This process can effectively reduce the brightness abruptness phenomenon in backlight display, improve the uniformity and smoothness of the image display, optimize the visual experience, and solve the problem of poor viewing experience caused by excessive brightness difference in existing backlight partitions. Attached Figure Description

[0014] Figure 1 This is a flowchart illustrating a method for backlight partition driving smoothing provided by the present invention;

[0015] Figure 2 This is a schematic diagram illustrating the positional relationship between a partition and its neighboring partitions in a backlight partition driving smoothing method provided by the present invention. Detailed Implementation

[0016] This invention addresses the problem of poor viewing experience caused by excessive brightness differences in existing backlight zones by providing a method for smoothing backlight zone driving, such as... Figure 1 As shown, it includes the following steps:

[0017] S1. Obtain the horizontal and vertical pixels of the partition.

[0018] Specifically, typically, each partition has the same shape and size; for example, the screen resolution is... It will be divided into horizontal directions Divided vertically into portions If the number of partitions is 1, then the horizontal pixel value corresponding to each partition is 1. The pixels corresponding to the vertical direction are .

[0019] S2. Divide the smaller value of the horizontal and vertical pixels by the larger value to obtain the aspect ratio of the partition; determine the brightness weighting coefficient based on the aspect ratio of the partition.

[0020] Specifically, if ,but ,otherwise, ,in, The aspect ratio of the partition indicates whether its shape is close to a square. The brightness weighting coefficient is determined based on the partition's aspect ratio; for example, the closer the partition shape is to a square, the closer the brightness weighting coefficient is to 1. A lower limit for the weighting coefficient can also be set to prevent the brightness weighting coefficient from being too small due to an overly narrow partition shape, thus affecting the display effect. Specifically, a reasonable lower limit value for the weighting coefficient can be preset to ensure that each partition has a suitable weight when adjusting brightness, thereby improving the overall viewing experience. For example, if the partition's aspect ratio is less than 0.5, then... ;otherwise, ;in, This represents the brightness weighting coefficient, where A is a preset value, and the range of A is 1 ≥ A > 0.

[0021] S3. Determine the distances in three directions between the center of the partition and the center of the adjacent partition, and determine the compensation ratio coefficient for each direction based on the distances in the three directions.

[0022] Specifically, the distances in the three directions include the horizontal distance, the vertical distance, and the diagonal distance. The formula for determining the compensation ratio coefficient for each direction based on the distances in the three directions is as follows: , , ,in, Indicates horizontal distance. Indicates the vertical distance. Indicates the distance in the diagonal direction. This represents the compensation ratio coefficient in the horizontal direction. This represents the compensation ratio coefficient in the vertical direction. This represents the compensation ratio coefficient in the diagonal direction, and the sum of the compensation ratio coefficients in the three directions is 1. The basis for determining the compensation ratio coefficient in each direction based on the distance in the three directions is that the influence of adjacent zones on the brightness of a zone decreases as the square of the center distance increases.

[0023] S4. Calculate the updated partition brightness value based on the brightness weight coefficient, the original brightness value of the partition, the compensation ratio coefficient for each direction, and the original brightness value of the corresponding neighboring partition.

[0024] Specifically, the calculation formula is as follows: ,in, This indicates the updated partition brightness value. Indicates the original brightness value of the partition. , , and This represents the original brightness values ​​of four diagonally adjacent zones. and This represents the original brightness values ​​of two adjacent partitions in a vertical direction. and This represents the original brightness values ​​of two horizontally adjacent partitions. This calculation process comprehensively considers the partition's own brightness and shape, as well as the brightness of neighboring partitions, enabling more accurate updates to partition brightness values. and , , , , , , and Positional relationships such as Figure 2 As shown.

[0025] Using the above calculation formula, the brightness value of each non-edge partition is calculated sequentially to obtain the updated brightness value of each non-edge partition. This effectively reduces brightness abrupt changes in backlight displays, improves the uniformity and smoothness of the image display, and optimizes the visual experience.

[0026] Example:

[0027] The television has a 4K resolution, meaning it has 3840 pixels in the horizontal direction and 2160 pixels in the vertical direction. The horizontal direction is divided into 128 parts, and the vertical direction into 54 parts. , , , , , , , , A is 0.8.

[0028] We can obtain the horizontal pixel count of the partition as 3840 / 128 = 30 and the vertical pixel count as 2160 / 54 = 40. Therefore, the aspect ratio of the partition is 30 / 40 = 0.75. Since 0.75 is greater than 0.5, therefore... .

[0029] Synchronous, it is also possible to obtain the horizontal distance between the center of a partition and the centers of neighboring partitions. Vertical distance , distance in the diagonal direction ,but , , .

[0030] therefore, .

[0031] Similarly, the updated brightness value of each non-edge location can be calculated, thereby correcting the current of each zone and smoothly transitioning the brightness of each zone of the backlit zone LCD TV, thus improving the display effect of the backlit zone LCD TV.

Claims

1. A method for smoothing backlight partition driving, characterized in that, Includes the following steps: S1. Obtain the horizontal and vertical pixels of the partition; S2. Divide the smaller value of the horizontal and vertical pixels by the larger value to obtain the aspect ratio of the partition; determine the brightness weighting coefficient based on the aspect ratio of the partition. S3. Determine the distances in three directions between the center of the partition and the center of the adjacent partition, and determine the compensation ratio coefficient for each direction based on the distances in the three directions. S4. Calculate the updated partition brightness value based on the brightness weight coefficient, the original brightness value of the partition, the compensation ratio coefficient for each direction, and the original brightness value of the corresponding neighboring partition.

2. The method for smoothing backlight partition driving according to claim 1, characterized in that, In S2, the brightness weighting coefficient is determined based on the aspect ratio of the partition, including: if the aspect ratio of the partition is less than 0.5, then... ;otherwise, ;in, This represents the brightness weighting coefficient. This represents the aspect ratio of the partition. A is a preset value, and the range of A is 1 ≥ A >

0.

3. The method for smoothing backlight partition driving according to claim 2, characterized in that, In S3, the distances in the three directions include the horizontal distance, the vertical distance, and the diagonal distance. The formula for determining the compensation ratio coefficient for each direction based on the distances in the three directions is as follows: , , ,in, Indicates horizontal distance. Indicates the vertical distance. Indicates the distance in the diagonal direction. This represents the compensation ratio coefficient in the horizontal direction. This represents the compensation ratio coefficient in the vertical direction. This indicates the compensation ratio coefficient in the oblique direction.

4. The method for smoothing backlight partition driving according to claim 3, characterized in that, In S4, the calculation formula is: ,in, This indicates the updated partition brightness value. Indicates the original brightness value of the partition. , , and This represents the original brightness values ​​of four diagonally adjacent zones. and This represents the original brightness values ​​of two adjacent partitions in a vertical direction. and This represents the original brightness values ​​of two adjacent horizontally spaced zones.

5. The method for smoothing backlight partition driving according to any one of claims 1-4, characterized in that, The method further includes: S5, calculating the brightness value of each non-edge location partition in turn to obtain the updated brightness value of each non-edge location partition.

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