Control method of backlight unit, display apparatus, storage medium, and program product

Abstract

Embodiments of the present application provide a backlight unit control method, display device, storage medium and program product. The backlight unit includes a plurality of backlight regions, and each backlight region includes a white light source and a plurality of color light sources. In the case that the absolute value of the difference between the gray scale data of a target color light source in a target backlight region and the gray scale data of a corresponding color light source in any adjacent backlight region is greater than a preset threshold, the color light sources in the target backlight region are turned off, and only the white light source in the target backlight region is turned on. The light transmittance of the white light emitted by the white light source is higher than that of the colored light emitted by the color light source. After the white light source is turned off, the wavelength component of stray light can be reduced, the interference between the adjacent backlight region and the target backlight region can be weakened, and the single white light can reduce cross interference, thereby reducing the color bleeding between the target backlight region and the adjacent backlight region and improving the picture display effect.

Description

Technical Field

[0001] This application relates to the field of display, and more particularly to a control method for a backlight unit, a display device, a storage medium, and a program product. Background Technology

[0002] With the improvement of people's living standards and diversified needs, AM mini-LED (Active Matrix mini Light-emitting Diode) display devices are gradually becoming larger and more high-performance. In order to maintain and improve image quality and contrast, more precise brightness control is required. Therefore, increasing the number of local dimming zones helps to improve image quality and contrast.

[0003] As the number of local backlight areas increases, the interval between them decreases, making it easier for light from adjacent local backlight areas to interfere with each other, causing color blurring and affecting the display effect. Summary of the Invention

[0004] This application provides a backlight unit control method, display device, storage medium, and program product to reduce color smudges and improve screen display effect.

[0005] In a first aspect, embodiments of this application provide a method for controlling a backlight unit, the backlight unit including multiple backlight areas, each backlight area including a white light source and multiple colored light sources, the method including:

[0006] Acquire grayscale data of each colored light source in the target backlight area, as well as grayscale data of each colored light source in multiple adjacent backlight areas of the target backlight area;

[0007] The grayscale data of each color light source in the target backlight area is compared with the grayscale data of the corresponding color light source in each adjacent backlight area;

[0008] If the absolute value of the difference between the grayscale data of the target color light source in the target backlight area and the grayscale data of the corresponding color light source in any adjacent backlight area is greater than or equal to a preset threshold, the color light source in the target backlight area is turned off and the white light source in the target backlight area is turned on.

[0009] In one possible implementation, the preset threshold is negatively correlated with the resolution of the display device and positively correlated with the size of the display device.

[0010] In one possible implementation, the method further includes:

[0011] If the absolute value of the difference between the grayscale data of each colored light source in the target backlight area and the grayscale data of the corresponding colored light source in each adjacent backlight area is less than the preset threshold, the white light source in the target backlight area is turned off and the colored light source in the target backlight area is turned on.

[0012] In one possible implementation, the method further includes:

[0013] Obtain the location information of the target backlight area, and determine the adjacent backlight areas based on the location information of the target backlight area.

[0014] Secondly, embodiments of this application provide a display device, including: a backlight unit and a controller, wherein the backlight unit includes a plurality of backlight areas, and the backlight areas include a white light source and a plurality of colored light sources;

[0015] The controller is used to acquire grayscale data of each color light source in the target backlight area, as well as grayscale data of each color light source in multiple adjacent backlight areas of the target backlight area.

[0016] The grayscale data of each color light source in the target backlight area is compared with the grayscale data of the corresponding color light source in each adjacent backlight area;

[0017] If the absolute value of the difference between the grayscale data of the target color light source in the target backlight area and the grayscale data of the corresponding color light source in any adjacent backlight area is greater than or equal to a preset threshold, the color light source in the target backlight area is turned off and the white light source in the target backlight area is turned on.

[0018] In one possible implementation, the controller is at least one of a backlight driver, a backlight controller, a timing controller, and a system-on-a-chip.

[0019] Thirdly, embodiments of this application provide a control device for a backlight unit, the backlight unit including multiple backlight areas, each backlight area including a white light source and multiple colored light sources, the device comprising:

[0020] The acquisition module is used to acquire grayscale data of each colored light source in the target backlight area, as well as grayscale data of each colored light source in multiple adjacent backlight areas of the target backlight area.

[0021] The comparison module is used to compare the grayscale data of each color light source in the target backlight area with the grayscale data of the corresponding color light source in each adjacent backlight area.

[0022] The processing module is configured to, when the absolute value of the difference between the grayscale data of the target color light source in the target backlight area and the grayscale data of the corresponding color light source in any adjacent backlight area is greater than or equal to a preset threshold, turn off the color light source in the target backlight area and turn on the white light source in the target backlight area.

[0023] Fourthly, embodiments of this application provide an electronic device, including: a memory and a processor;

[0024] The memory stores computer-executed instructions;

[0025] The processor executes computer execution instructions stored in the memory, causing the processor to perform the first aspect and / or various possible implementations of the first aspect as described above.

[0026] Fifthly, embodiments of this application provide a computer-readable storage medium storing computer-executable instructions, which, when executed by a processor, are used to implement the first aspect and / or various possible implementations of the first aspect.

[0027] In a sixth aspect, embodiments of this application provide a computer program product, including a computer program that, when executed by a processor, implements the first aspect and / or various possible implementations of the first aspect.

[0028] The backlight unit control method, display device, storage medium, and program product provided in this application embodiment include a backlight unit comprising multiple backlight areas, each backlight area including a white light source and multiple colored light sources. The method acquires grayscale data of each colored light source in a target backlight area, as well as grayscale data of each colored light source in multiple adjacent backlight areas of the target backlight area. It compares the grayscale data of each colored light source in the target backlight area with the grayscale data of the corresponding colored light source in each adjacent backlight area. If the absolute value of the difference between the grayscale data of the target colored light source in the target backlight area and the grayscale data of the corresponding colored light source in any adjacent backlight area is greater than a preset threshold, the colored light sources in the target backlight area are turned off, and only the white light source in the target backlight area is turned on. Turn off the colored light source in the target backlight area and use a white light source to represent the grayscale data of the target backlight area. The transmittance of white light emitted by the white light source is higher than that of colored light emitted by the colored light source. After turning off the white light source, the wavelength components of stray light can be reduced, the interference between adjacent backlight areas and the target backlight area can be weakened, and the single white light can reduce cross interference, thereby reducing the color smudging between the target backlight area and adjacent backlight areas and improving the display effect. Attached Figure Description

[0029] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with this application and, together with the description, serve to explain the principles of this application.

[0030] Figure 1 This is a schematic diagram of the structure of the display device provided in this application;

[0031] Figure 2 A partial structural schematic diagram of the display device provided in this application;

[0032] Figure 3 A partial structural schematic diagram of the display device provided in this application;

[0033] Figure 4 This is a schematic diagram of color blending provided for this application;

[0034] Figure 5 A flowchart illustrating the control method for the backlight unit provided in this application;

[0035] Figure 6 A schematic diagram of the backlight area provided in this application;

[0036] Figure 7 This is a schematic diagram of color blending provided for this application;

[0037] Figure 8 A schematic diagram of the backlight area provided in this application;

[0038] Figure 9 This is a schematic diagram of the structure of the display device provided in this application;

[0039] Figure 10 A schematic diagram of the control device for the backlight unit provided in this application;

[0040] Figure 11 A schematic diagram of the structure of the electronic device provided in this application.

[0041] The accompanying drawings illustrate specific embodiments of this application, which will be described in more detail below. These drawings and descriptions are not intended to limit the scope of the concept in any way, but rather to illustrate the concept of this application to those skilled in the art through reference to particular embodiments. Detailed Implementation

[0042] Exemplary embodiments will now be described in detail, examples of which are illustrated in the accompanying drawings. When the following description relates to the drawings, unless otherwise indicated, the same numbers in different drawings denote the same or similar elements. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with this application. Rather, they are merely examples of apparatuses and methods consistent with some aspects of this application as detailed in the appended claims.

[0043] like Figure 1 As shown, the display device includes a backlight unit (BLU) 100, a liquid crystal display (LCD) panel 200, a backlight controller 300, a timing controller (TCON) 400, and a system-on-chip (SoC) 500. The backlight unit 100 may include multiple backlight drivers 10 arranged in an array, and multiple light-emitting units 30 connected to each backlight driver 10. The light-emitting units 30 may be, for example, Mini LEDs (Mini Light-Emitting Diodes).

[0044] The system-on-a-chip 500 receives image signals from a signal source (such as cable TV, satellite TV, or online streaming media) and sends the image signals to the timing controller 400. The timing controller 400 converts the image signals into data signals and control signals, sending the data signals to the liquid crystal display panel 200 and the control signals to the backlight controller 300. The backlight controller 300 generates local dimming data for each backlight area on the backlight unit 100 based on the data signals and sends the local dimming data for each backlight area 30 to the corresponding backlight driver 10. The backlight driver 10 controls the brightness of the corresponding light-emitting unit 30 based on the local dimming data, thus achieving local dimming of the backlight unit 100. Accordingly, the liquid crystal display panel 200 displays images based on the data signals under the action of the backlight unit 100.

[0045] With the improvement of people's living standards and diversified needs, AM mini-LED display devices are gradually becoming larger and higher-performance. To maintain and improve image quality and contrast, more precise brightness control is required; therefore, increasing the number of local backlight areas, such as... Figure 2 and Figure 3 As shown, this helps improve image quality and contrast.

[0046] As the number of local backlight areas increases, the spacing between them decreases, making it easier for light from adjacent local backlight areas to interfere with each other. Figure 4 As shown, Figure 4This is a cross-sectional view of the backlight unit. The red light from the red light source in the first backlight area interferes with the green light from the green light source in the second backlight area, causing an overlap of red and green light. Similarly, the green light from the green light source in the second backlight area interferes with the blue light from the blue light source in the third backlight area, causing an overlap of green and blue light. This light interference refers to the color blurring phenomenon caused by light overlap at the interface of adjacent backlight areas, affecting the display effect.

[0047] To address this, this application proposes a backlight unit control method. When the absolute value of the difference between the grayscale data of the target color light source in the target backlight area and the grayscale data of the corresponding color light source in any adjacent backlight area is greater than or equal to a preset threshold, the color light source in the target backlight area is turned off, and only the white light source in the target backlight area is turned on. The transmittance of white light emitted by the white light source is higher than that of colored light emitted by the color light source. Turning off the white light source reduces the wavelength components of stray light, weakens the interference between adjacent backlight areas and the target backlight area, and the single white light reduces cross-interference, thereby reducing color bleeding between the target backlight area and adjacent backlight areas and improving the display effect.

[0048] The technical solution of this application and how the technical solution of this application solves the above-mentioned technical problems are described in detail below with specific embodiments. These specific embodiments can be combined with each other, and the same or similar concepts or processes may not be described again in some embodiments. The embodiments of this application will now be described with reference to the accompanying drawings.

[0049] Figure 5 A flowchart illustrating the control method for the backlight unit provided in this application is shown below. Figure 5 As shown, the method includes:

[0050] S101. Obtain the grayscale data of each color light source in the target backlight area, and the grayscale data of each color light source in multiple adjacent backlight areas of the target backlight area.

[0051] The backlight unit includes multiple backlight areas. The target backlight area can be any backlight area among the multiple backlight areas. The adjacent backlight areas of the target backlight area refer to the backlight areas adjacent to the target backlight area, which can include the backlight areas located to the left, right, top, bottom, upper left, lower left, upper right, and lower right of the target backlight area.

[0052] For example, such as Figure 6 As shown, in order from left to right and from top to bottom, the backlight unit includes backlight area 1, backlight area 2, backlight area 3, backlight area 4, backlight area 5, backlight area 6, backlight area 7, backlight area 8 and backlight area 9.

[0053] If the target backlight area is backlight area 5, then the adjacent backlight areas of the target backlight area include backlight area 1, backlight area 2, backlight area 3, backlight area 4, backlight area 6, backlight area 7, backlight area 8, and backlight area 9.

[0054] If the target backlight area is backlight area 1, then the adjacent backlight areas of the target backlight area include backlight area 2, backlight area 4, and backlight area 5.

[0055] If the target backlight area is backlight area 4, then the adjacent backlight areas of the target backlight area include backlight area 1, backlight area 2, backlight area 5, backlight area 7, and backlight area 8.

[0056] In this embodiment, each backlight area may include a white light source and multiple colored light sources. The white light source is typically used to provide basic backlight illumination, ensuring sufficient brightness across the entire display. The white light source helps achieve a uniform distribution of screen brightness, providing a consistent visual experience. Colored light sources can provide a wider color gamut and more accurate color reproduction. Colored light sources allow for independent control of the brightness of each color, enabling finer color correction and dynamic range adjustment. Colored light sources can also be used to implement local dimming technology, which helps improve contrast and reduce halo effects. Colored light sources include, but are not limited to, red, green, and blue light sources.

[0057] For example, the grayscale data of each colored light source in the target backlight area may include the grayscale values ​​of the red light source, the green light source, and the blue light source in the target backlight area. The grayscale data of each colored light source in each adjacent backlight area may include the grayscale values ​​of the red light source, the green light source, and the blue light source in the adjacent backlight area.

[0058] In practical applications, grayscale data includes grayscale values. The larger the grayscale value, the greater the luminous intensity; the smaller the grayscale value, the smaller the luminous intensity. Grayscale values ​​can be represented by 0-255; the larger the value, the greater the grayscale value, and the smaller the value, the smaller the grayscale value.

[0059] In some optional implementations, the location information of the target backlight area is obtained, and adjacent backlight areas are determined based on the location information of the target backlight area. For example, the backlight unit includes multiple backlight areas arranged in an array, the number of rows and columns of the target backlight area in the backlight unit is determined, and adjacent backlight areas are determined based on the number of rows and columns of the target backlight area in the backlight unit.

[0060] S102. Compare the grayscale data of each color light source in the target backlight area with the grayscale data of the corresponding color light source in each adjacent backlight area.

[0061] It should be noted that the corresponding color light source in the adjacent backlight area refers to the light source corresponding to the target color light source. For example, if the target color light source is red, then the corresponding color light source in the adjacent backlight area is red; if the target color light source is green, then the corresponding color light source in the adjacent backlight area is green; and if the target color light source is blue, then the corresponding color light source in the adjacent backlight area is blue.

[0062] The grayscale data of the target backlight area is compared with the grayscale data of the same color light source in each adjacent backlight area. For example, the grayscale data of the red light source in the target backlight area is compared with the grayscale data of the red light source in each adjacent backlight area, the grayscale data of the green light source in the target backlight area is compared with the grayscale data of the green light source in each adjacent backlight area, and the grayscale data of the blue light source in the target backlight area is compared with the grayscale data of the blue light source in each adjacent backlight area.

[0063] S103. If the absolute value of the difference between the grayscale data of the target color light source in the target backlight area and the grayscale data of the corresponding color light source in any adjacent backlight area is greater than or equal to a preset threshold, the color light source in the target backlight area is turned off and the white light source in the target backlight area is turned on.

[0064] In this embodiment, if the absolute value of the difference between the grayscale data of the target color light source in the target backlight area and the grayscale data of the corresponding color light source in any adjacent backlight area is greater than or equal to a preset threshold, it is determined that the grayscale data of the target backlight area and the grayscale data of the adjacent backlight areas differ significantly, indicating substantial interference between the target backlight area and the adjacent backlight areas, which can easily lead to color smudges. Therefore, the color light source in the target backlight area is turned off, and a white light source is used to represent the grayscale data of the target backlight area. The transmittance of white light emitted by the white light source is higher than that of colored light emitted by the color light source. Turning off the color light source can reduce the wavelength components of stray light, weaken the interference between the adjacent backlight areas and the target backlight area, and since colored light is easily superimposed, a single white light can reduce cross-interference, thereby reducing color smudges between the target backlight area and the adjacent backlight areas and improving the display effect.

[0065] For example, such as Figure 7 As shown, (a) represents the ideal grayscale state change curve, (b) represents the grayscale state change curve with color bleed, and (c) represents the grayscale state change curve by reducing color bleed by turning off the colored light source in the target backlight area. In the ideal grayscale state change, there is no interference between adjacent backlight areas, such as... Figure 7 As shown in (a), the light source in the first backlight area does not interfere with the light source in the second backlight area. However, in practical applications, when the grayscale data of two adjacent backlight areas differ significantly, interference can occur between the adjacent backlight areas, such as... Figure 7 As shown in (b), the light source in the first backlight area interferes with the light source in the second backlight area, causing the color of the first backlight area to bleed into the color of the second backlight area. The bleed portion is as follows: Figure 7 The shaded area corresponding to (b) in the diagram. Through the solution of this application, the colored light source in the target backlight area is turned off, and the white light source in the target backlight area is turned on, such as... Figure 7 As shown in (c), by turning off the colored light source in the first backlight area and turning on the white light source in the first backlight area, the smearing effect of the first backlight area on the second backlight area can be reduced. The smeared portion at this time is as follows: Figure 7 The shaded area corresponding to (c) in the diagram.

[0066] It should be noted that if the grayscale data of the target color light source in the target backlight area is greater than the grayscale data of the corresponding color light source in any adjacent backlight area, and the absolute value of the difference between the two is greater than a preset threshold, the color light source in the target backlight area can be turned off; if the grayscale data of the target color light source in the target backlight area is less than the grayscale data of the corresponding color light source in an adjacent backlight area, and the absolute value of the difference between the two is greater than a preset threshold, the color light source in the target backlight area can be turned off.

[0067] The preset threshold is used to prevent unconditional or blind grayscale and to prevent color distortion in the corresponding position of the target backlight area.

[0068] For example, the target color light source may include any color light source, such as any one of a red light source, a green light source, and a blue light source.

[0069] For example, the absolute value of the difference between the grayscale data of each colored light source in the target backlight area and the grayscale data of each colored light source in each adjacent backlight area can be determined, that is, multiple absolute values ​​of difference are obtained. If any absolute value of difference is greater than a preset threshold, the colored light source in the target backlight area is turned off and the white light source in the target backlight area is turned on.

[0070] For example, a first absolute value of the difference between the grayscale of the red light source in the target backlight area and the grayscale of the red light source in each adjacent backlight area can be determined; a second absolute value of the difference between the grayscale of the green light source in the target backlight area and the grayscale of the green light source in each adjacent backlight area can be determined; and a third absolute value of the difference between the grayscale of the blue light source in the target backlight area and the grayscale of the blue light source in each adjacent backlight area can be determined. Then, if any of the first absolute values ​​of the difference is greater than a preset threshold, the colored light source in the target backlight area is turned off; if any of the second absolute values ​​of the difference is greater than the preset threshold, the colored light source in the target backlight area is turned off; and if any of the third absolute values ​​of the difference is greater than the preset threshold, the colored light source in the backlight area is turned off.

[0071] For example, such as Figure 6 As shown, the backlight unit includes backlight area 1, backlight area 2, backlight area 3, backlight area 4, backlight area 5, backlight area 6, backlight area 7, backlight area 8, and backlight area 9. If the target backlight area is backlight area 5, then the adjacent backlight areas of the target backlight area include backlight area 1, backlight area 2, backlight area 3, backlight area 4, backlight area 6, backlight area 7, backlight area 8, and backlight area 9.

[0072] Accordingly, the absolute values ​​of the differences between the grayscale data of each color light source in backlight area 5 and the grayscale data of each color light source in backlight area 1 can be determined; the absolute values ​​of the differences between the grayscale data of each color light source in backlight area 5 and the grayscale data of each color light source in backlight area 2 can be determined; the absolute values ​​of the differences between the grayscale data of each color light source in backlight area 5 and the grayscale data of each color light source in backlight area 3 can be determined; and the absolute values ​​of the differences between the grayscale data of each color light source in backlight area 5 and the grayscale data of each color light source in backlight area 4 can be determined. The absolute values ​​are: the absolute difference between the grayscale data of each color light source in backlight area 5 and the grayscale data of each color light source in backlight area 6; the absolute difference between the grayscale data of each color light source in backlight area 5 and the grayscale data of each color light source in backlight area 7; the absolute difference between the grayscale data of each color light source in backlight area 5 and the grayscale data of each color light source in backlight area 8; and the absolute difference between the grayscale data of each color light source in backlight area 5 and the grayscale data of each color light source in backlight area 9. Then, when any absolute difference exceeds a preset threshold, the color light source in the target backlight area is turned off.

[0073] For example, determine the first absolute value of the difference between the grayscale of the red light source in backlight area 5 and the grayscale of the red light source in backlight area 1, determine the second absolute value of the difference between the grayscale of the green light source in backlight area 5 and the grayscale of the green light source in backlight area 1, and determine the third absolute value of the difference between the grayscale of the blue light source in backlight area 5 and the grayscale of the blue light source in backlight area 1.

[0074] Determine the absolute value of the first difference between the grayscale of the red light source in backlight area 5 and the grayscale of the red light source in backlight area 2; determine the absolute value of the second difference between the grayscale of the green light source in backlight area 5 and the grayscale of the green light source in backlight area 2; and determine the absolute value of the third difference between the grayscale of the blue light source in backlight area 5 and the grayscale of the blue light source in backlight area 2.

[0075] Similarly, a first absolute value of the difference between the grayscale of the red light source in backlight area 5 and the grayscale of the red light source in each adjacent backlight area is determined; a second absolute value of the difference between the grayscale of the green light source in backlight area 5 and the grayscale of the green light source in each adjacent backlight area is determined; and a third absolute value of the difference between the grayscale of the blue light source in backlight area 5 and the grayscale of the blue light source in each adjacent backlight area is determined.

[0076] If the absolute value of any first difference is greater than a preset threshold, the colored light source in the target backlight area is turned off; if the absolute value of any second difference is greater than a preset threshold, the colored light source in the target backlight area is turned off; if the absolute value of any third difference is greater than a preset threshold, the colored light source in the target backlight area is turned off.

[0077] For example, such as Figure 6 and Figure 8 As shown, when the target backlight area is backlight area 4, it is determined that there exists a situation where the absolute value of the third difference is greater than a preset threshold, such as... Figure 6 As shown, the colored light source in backlight area 4 is turned off, and the white light source in backlight area 4 is turned on, as shown. Figure 8 As shown. When the target backlight area is 5, if it is determined that the absolute value of the third difference is greater than the preset threshold, then the colored light source of backlight area 5 is turned off and the white light source of backlight area 5 is turned on. When the target backlight area is 6, if it is determined that the absolute value of the third difference is greater than the preset threshold, then the colored light source of backlight area 6 is turned off and the white light source of backlight area 6 is turned on.

[0078] When the target backlight area is backlight area 7, if it is determined that there exists a second difference whose absolute value is greater than a preset threshold, such as... Figure 6 As shown, the colored light source of backlight area 7 is turned off, and the white light source of backlight area 7 is turned on, as shown. Figure 8 As shown. When the target backlight area is backlight area 8, if it is determined that the absolute value of the second difference is greater than a preset threshold, then the colored light source of backlight area 8 is turned off and the white light source of backlight area 8 is turned on. When the target backlight area is backlight area 9, if it is determined that the absolute value of the second difference is greater than a preset threshold, then the colored light source of backlight area 9 is turned off and the white light source of backlight area 9 is turned on.

[0079] In one possible implementation, the preset threshold is negatively correlated with the display device's resolution and positively correlated with the display device's size. High-resolution displays may require more precise brightness adjustments, and therefore a smaller threshold may be chosen. Larger screens may require a larger threshold to avoid visual discomfort caused by overly frequent adjustments. The specific value of the preset threshold is determined based on the actual situation and is not limited here.

[0080] In one possible implementation, when the colored light source in the target backlight area is turned off and the white light source in the target backlight area is turned on, the grayscale of the white light source is 30%-70% of the maximum brightness of the white light source, and the grayscale of the white light source is positively correlated with the number of adjacent backlight areas. Adjacent backlight areas are defined as those where the absolute value of the difference between the grayscale data and the grayscale data of the target backlight area is greater than a preset threshold. That is, the more adjacent backlight areas there are, the greater the grayscale of the white light source in the target backlight area; the fewer adjacent backlight areas there are, the smaller the grayscale of the white light source in the target backlight area.

[0081] Since the higher the grayscale of white light, the lower the light intensity, and under low light intensity, interference from ambient stray light or other light sources is more easily perceived, resulting in lower anti-interference capability, the grayscale of the white light source in the target's backlight area is positively correlated with the number of adjacent backlight areas. For example, the grayscale of the white light source in the target's backlight area can be in the medium grayscale range (30%-70%). In 8-bit grayscale, 30% is 178, and 70% is 76.

[0082] In one possible implementation, a correspondence can be established between the grayscale of the white light source and the number of adjacent backlight areas of the target, and this correspondence can be stored in a look-up table (LUT). After determining the number of adjacent backlight areas of the target, the corresponding grayscale of the white light source is retrieved from the look-up table, thereby effectively reducing color interference.

[0083] In some optional implementations, if the absolute value of the difference between the grayscale data of each color light source in the target backlight area and the grayscale data of the corresponding color light source in each adjacent backlight area is less than a preset threshold, the white light source in the target backlight area is turned off and the color light source in the target backlight area is turned on.

[0084] For example, there are multiple adjacent backlight areas of the target backlight area. The grayscale data of each color light source in the target backlight area is compared with the grayscale data of the corresponding color light source in each adjacent backlight area. When the absolute value of the difference between the grayscale data of each color light source in the target backlight area and the grayscale data of the corresponding color light source in each adjacent backlight area is less than a preset threshold, the grayscale difference between the target backlight area and the adjacent backlight areas is small, and the color bleed between them is not obvious. Therefore, the white light source in the target backlight area is turned off to reduce energy consumption, and the grayscale data of the target backlight area is represented by the color light source in the target backlight area.

[0085] For example, the colored light source includes red, green, and blue light sources. If the absolute value of the difference between the grayscale of the red light source in the target backlight area and the grayscale of the red light source in the adjacent backlight area is less than or equal to a preset threshold, and the absolute value of the difference between the grayscale of the green light source in the target backlight area and the grayscale of the green light source in the adjacent backlight area is less than or equal to a preset threshold, and the absolute value of the difference between the grayscale of the blue light source in the target backlight area and the grayscale of the blue light source in the adjacent backlight area is less than or equal to a preset threshold, then the white light source in the target backlight area is turned off, and the colored light source in the target backlight area is turned on.

[0086] For example, such as Figure 6 As shown, the backlight unit includes backlight area 1, backlight area 2, backlight area 3, backlight area 4, backlight area 5, backlight area 6, backlight area 7, backlight area 8, and backlight area 9. If the target backlight area is backlight area 5, then the adjacent backlight areas of the target backlight area include backlight area 1, backlight area 2, backlight area 3, backlight area 4, backlight area 6, backlight area 7, backlight area 8, and backlight area 9.

[0087] Determine the absolute value of the first difference between the grayscale of the red light source in backlight area 5 and the grayscale of the red light source in backlight area 1; determine the absolute value of the second difference between the grayscale of the green light source in backlight area 5 and the grayscale of the green light source in backlight area 1; and determine the absolute value of the third difference between the grayscale of the blue light source in backlight area 5 and the grayscale of the blue light source in backlight area 1.

[0088] Determine the absolute value of the first difference between the grayscale of the red light source in backlight area 5 and the grayscale of the red light source in backlight area 2; determine the absolute value of the second difference between the grayscale of the green light source in backlight area 5 and the grayscale of the green light source in backlight area 2; and determine the absolute value of the third difference between the grayscale of the blue light source in backlight area 5 and the grayscale of the blue light source in backlight area 2.

[0089] Similarly, a first absolute value of the difference between the grayscale of the red light source in backlight area 5 and the grayscale of the red light source in each adjacent backlight area is determined; a second absolute value of the difference between the grayscale of the green light source in backlight area 5 and the grayscale of the green light source in each adjacent backlight area is determined; and a third absolute value of the difference between the grayscale of the blue light source in backlight area 5 and the grayscale of the blue light source in each adjacent backlight area is determined.

[0090] If the absolute value of each first difference is less than or equal to a preset threshold, if the absolute value of each second difference is less than or equal to a preset threshold, and if the absolute value of each third difference is less than or equal to a preset threshold, turn off the white light source in the target backlight area and turn on the red, green, and blue light sources in the target backlight area.

[0091] For example, such as Figure 6 and Figure 8 As shown, when the target backlight area is backlight area 1, the adjacent backlight areas of backlight area 1 include backlight area 2, backlight area 4, and backlight area 5. The absolute value of the first difference between the grayscale of the red light source in backlight area 1 and the grayscale of the red light source in backlight area 2; the absolute value of the second difference between the grayscale of the green light source in backlight area 1 and the grayscale of the green light source in backlight area 2; the absolute value of the third difference between the grayscale of the blue light source in backlight area 1 and the grayscale of the blue light source in backlight area 2; the absolute value of the first difference between the grayscale of the red light source in backlight area 1 and the grayscale of the red light source in backlight area 4; the absolute value of the second difference between the grayscale of the green light source in backlight area 1 and the grayscale of the green light source in backlight area 4; and the absolute value of the third difference between the grayscale of the blue light source in backlight area 1 and the grayscale of the blue light source in backlight area 5. If the absolute value of the third difference between the grayscale of the colored light source and the grayscale of the blue light source in backlight area 4, the absolute value of the first difference between the grayscale of the red light source in backlight area 1 and the grayscale of the red light source in backlight area 5, the absolute value of the second difference between the grayscale of the green light source in backlight area 1 and the grayscale of the green light source in backlight area 5, and the absolute value of the third difference between the grayscale of the blue light source in backlight area 1 and the grayscale of the blue light source in backlight area 5 are all less than or equal to a preset threshold, then the white light source in backlight area 1 is turned off, and the colored light source in backlight area 1 is turned on (for example, the blue light source in backlight area 1 is turned on).

[0092] The backlight unit control method provided in this application, when the absolute value of the difference between the grayscale data of the target color light source in the target backlight area and the grayscale data of the corresponding color light source in any adjacent backlight area is greater than or equal to a preset threshold, turns off the color light source in the target backlight area and turns on only the white light source in the target backlight area. Turning off the color light source in the target backlight area and using the white light source to represent the grayscale data of the target backlight area, the transmittance of white light emitted by the white light source is higher than that of colored light emitted by the color light source. After turning off the white light source, the wavelength component of stray light can be reduced, weakening the interference between adjacent backlight areas and the target backlight area. Furthermore, the single white light can reduce cross-interference, thereby reducing color bleeding between the target backlight area and adjacent backlight areas and improving the image display effect.

[0093] Figure 9 This is a schematic diagram of the structure of the display device provided in this application, such as... Figure 9 As shown, the display device provided in this application embodiment includes:

[0094] The backlight unit 100 and the controller 20 are included. The backlight unit 100 includes multiple backlight areas, and the backlight areas include white light sources and colored light sources.

[0095] The controller 20 is used to acquire grayscale data of each color light source in the target backlight area, as well as grayscale data of each color light source in multiple adjacent backlight areas of the target backlight area.

[0096] The grayscale data of each color light source in the target backlight area is compared with the grayscale data of the corresponding color light source in each adjacent backlight area.

[0097] If the absolute value of the difference between the grayscale data of the target color light source in the target backlight area and the grayscale data of the corresponding color light source in any adjacent backlight area is greater than or equal to a preset threshold, the color light source in the target backlight area is turned off and the white light source in the target backlight area is turned on.

[0098] In some alternative implementations, the controller is at least one of a backlight driver, a backlight controller, a timing controller, and a system-on-a-chip.

[0099] For example, the controller is a backlight driver. If the absolute value of the difference between the grayscale data of the target color light source in the target backlight area and the grayscale data of the corresponding color light source in any adjacent backlight area is greater than or equal to a preset threshold, the backlight driver turns off the color light source in the target backlight area and turns on the white light source in the target backlight area.

[0100] For example, the controller is a backlight controller. If the absolute value of the difference between the grayscale data of the target color light source in the target backlight area and the grayscale data of the corresponding color light source in any adjacent backlight area is greater than or equal to a preset threshold, the backlight controller determines to turn off the color light source in the target backlight area and sends a turn-off signal to the backlight driver so that the backlight driver turns off the color light source in the target backlight area.

[0101] For example, the controller is a timing controller. If the absolute value of the difference between the grayscale data of the target color light source in the target backlight area and the grayscale data of the corresponding color light source in any adjacent backlight area is greater than or equal to a preset threshold, the timing controller determines to turn off the color light source in the target backlight area and sends a turn-off signal to the backlight controller. The backlight controller sends the turn-off signal to the backlight driver so that the backlight driver turns off the color light source in the target backlight area.

[0102] For example, the controller is a system-on-a-chip (SoC). If the absolute value of the difference between the grayscale data of the target color light source in the target backlight area and the grayscale data of the corresponding color light source in any adjacent backlight area is greater than or equal to a preset threshold, the SoC determines to turn off the color light source in the target backlight area and sends a turn-off signal to the timing controller. The timing controller sends the turn-off signal to the backlight controller, and the backlight controller sends the turn-off signal to the backlight driver so that the backlight driver turns off the color light source in the target backlight area.

[0103] The display device provided in this application includes a display unit and a controller. The display unit includes multiple backlight areas. If the absolute value of the difference between the grayscale data of the target color light source in the target backlight area and the grayscale data of the corresponding color light source in any adjacent backlight area is greater than or equal to a preset threshold, the controller turns off the color light source in the target backlight area and turns on only the white light source in the target backlight area.

[0104] Figure 10 This is a schematic diagram of the control device for the backlight unit provided in this application. The backlight unit includes multiple backlight areas, and each backlight area includes a white light source and multiple colored light sources, such as... Figure 10 As shown, the control device 10 for the backlight unit provided in this embodiment includes:

[0105] The acquisition module 11 is used to acquire grayscale data of each color light source in the target backlight area, as well as grayscale data of each color light source in multiple adjacent backlight areas of the target backlight area.

[0106] Comparison module 12 is used to compare the grayscale data of each color light source in the target backlight area with the grayscale data of the corresponding color light source in each adjacent backlight area.

[0107] Processing module 13 is used to turn off the color light source in the target backlight area and turn on the white light source in the target backlight area if the absolute value of the difference between the grayscale data of the target color light source in the target backlight area and the grayscale data of the corresponding color light source in any adjacent backlight area is greater than or equal to a preset threshold.

[0108] In one possible implementation, when a white light source is turned on in the target backlight area, the grayscale of the white light source is 30%-70% of the maximum brightness of the white light source, and the grayscale of the white light source is positively correlated with the number of adjacent backlight areas. The adjacent backlight areas are those adjacent backlight areas where the absolute value of the difference between the grayscale data of the target color light source and the grayscale data of the target color light source in the target backlight area is greater than a preset threshold.

[0109] In one possible implementation, the preset threshold is negatively correlated with the resolution of the display device and positively correlated with the size of the display device.

[0110] In one possible implementation, the processing module 13 is further configured to, if the absolute value of the difference between the grayscale data of each color light source in the target backlight area and the grayscale data of the corresponding color light source in each adjacent backlight area is less than a preset threshold, turn off the white light source in the target backlight area and turn on the color light source in the target backlight area.

[0111] In one possible implementation, the acquisition module 11 is further configured to acquire the location information of the target backlight area and determine the adjacent backlight areas based on the location information of the target backlight area.

[0112] The backlight unit control device provided in this embodiment can execute the method provided in the above method embodiment. Its implementation principle and technical effect are similar, and will not be described in detail here.

[0113] Figure 11 A schematic diagram of the structure of the electronic device provided in this application. Figure 11 As shown, the electronic device 50 provided in this embodiment includes at least one processor 501 and a memory 502. Optionally, the electronic device 50 further includes a communication component 503. The processor 501, memory 502, and communication component 503 are connected via a bus.

[0114] In a specific implementation, at least one processor 501 executes computer execution instructions stored in memory 502, causing at least one processor 501 to perform the above-described method.

[0115] The specific implementation process of processor 501 can be found in the above method embodiments, and its implementation principle and technical effect are similar. It will not be repeated here.

[0116] In the above embodiments, it should be understood that the processor can be a Central Processing Unit (CPU), or other general-purpose processors, digital signal processors (DSPs), application-specific integrated circuits (ASICs), etc. The general-purpose processor can be a microprocessor or any conventional processor. The steps of the method disclosed in this invention can be directly implemented by a hardware processor, or implemented by a combination of hardware and software modules within the processor.

[0117] The memory may include random access memory (RAM) and may also include non-volatile memory (NVM), such as at least one disk storage device.

[0118] The bus can be an Industry Standard Architecture (ISA) bus, a Peripheral Component Interconnect (PCI) bus, or an Extended Industry Standard Architecture (EISA) bus, etc. Buses can be categorized as address buses, data buses, control buses, etc. For ease of illustration, the buses shown in the accompanying drawings are not limited to a single bus or a single type of bus.

[0119] This application also provides a computer program product, including a computer program that, when executed by a processor, implements the above-described method.

[0120] This application also provides a computer-readable storage medium storing computer-executable instructions, which, when executed by a processor, implement the above-described method.

[0121] The aforementioned readable storage medium can be implemented by any type of volatile or non-volatile storage device or a combination thereof, such as static random access memory (SRAM), electrically erasable programmable read-only memory (EEPROM), erasable programmable read-only memory (EPROM), programmable read-only memory (PROM), read-only memory (ROM), magnetic storage, flash memory, magnetic disk, or optical disk. The readable storage medium can be any available medium accessible to a general-purpose or special-purpose computer.

[0122] An exemplary readable storage medium is coupled to a processor, enabling the processor to read information from and write information to the readable storage medium. Of course, the readable storage medium can also be a component of the processor. The processor and the readable storage medium can reside in an Application Specific Integrated Circuit (ASIC). Alternatively, the processor and the readable storage medium can exist as discrete components in the device.

[0123] The division of units is merely a logical functional division; in actual implementation, there may be other division methods. For example, multiple units or components may be combined or integrated into another system, or some features may be ignored or not executed. Furthermore, the coupling or direct coupling or communication connection shown or discussed may be indirect coupling or communication connection through some interfaces, devices, or units, and may be electrical, mechanical, or other forms.

[0124] The units described as separate components may or may not be physically separate. The components shown as units may or may not be physical units; that is, they may be located in one place or distributed across multiple network units. Some or all of the units can be selected to achieve the purpose of this embodiment according to actual needs.

[0125] In addition, the functional units in the various embodiments of the present invention can be integrated into one processing unit, or each unit can exist physically separately, or two or more units can be integrated into one unit.

[0126] If a function is implemented as a software functional unit and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of this invention, or the part that contributes to the prior art, or a part of the technical solution, can be embodied in the form of a software product. This computer software product is stored in a storage medium and includes several instructions to cause a computer device (which may be a personal computer, server, or network device, etc.) to execute all or part of the steps of the methods of the various embodiments of this invention. The aforementioned storage medium includes various media capable of storing program code, such as USB flash drives, portable hard drives, read-only memory (ROM), random access memory (RAM), magnetic disks, or optical disks.

[0127] Those skilled in the art will understand that all or part of the steps of the above-described method embodiments can be implemented by hardware related to program instructions. The aforementioned program can be stored in a computer-readable storage medium. When executed, the program performs the steps of the above-described method embodiments; and the aforementioned storage medium includes various media capable of storing program code, such as ROM, RAM, magnetic disks, or optical disks.

[0128] Finally, it should be noted that other embodiments of the invention will readily occur to those skilled in the art upon consideration of the specification and practice of the invention disclosed herein. This invention is intended to cover any variations, uses, or adaptations of the invention that follow the general principles of the invention and include common knowledge or customary techniques in the art not disclosed herein, and is not limited to the precise structures described above and shown in the accompanying drawings, and various modifications and changes can be made without departing from its scope. The scope of the invention is limited only by the appended claims.

Claims

1. A control method for a backlight unit, characterized in that, The backlight unit includes multiple backlight areas, each backlight area including a white light source and multiple colored light sources; the method includes: Acquire grayscale data of each colored light source in the target backlight area, as well as grayscale data of each colored light source in multiple adjacent backlight areas of the target backlight area; The grayscale data of each color light source in the target backlight area is compared with the grayscale data of the corresponding color light source in each adjacent backlight area; If the absolute value of the difference between the grayscale data of the target color light source in the target backlight area and the grayscale data of the corresponding color light source in any adjacent backlight area is greater than or equal to a preset threshold, the color light source in the target backlight area is turned off and the white light source in the target backlight area is turned on. The preset threshold is negatively correlated with the resolution of the display device and positively correlated with the size of the display device. The grayscale of the white light source is positively correlated with the number of target adjacent backlight areas, and the target adjacent backlight areas are adjacent backlight areas where the absolute value of the difference between the grayscale data and the grayscale data of the target backlight area is greater than the preset threshold.

2. The method according to claim 1, characterized in that, The method further includes: If the absolute value of the difference between the grayscale data of each colored light source in the target backlight area and the grayscale data of the corresponding colored light source in each adjacent backlight area is less than the preset threshold, the white light source in the target backlight area is turned off and the colored light source in the target backlight area is turned on.

3. The method according to claim 1, characterized in that, The method further includes: Obtain the location information of the target backlight area, and determine the adjacent backlight areas based on the location information of the target backlight area.

4. A display device, characterized in that, include: A backlight unit and a controller, wherein the backlight unit includes multiple backlight areas, and each backlight area includes a white light source and multiple colored light sources; The controller is used to acquire grayscale data of each color light source in the target backlight area, as well as grayscale data of each color light source in multiple adjacent backlight areas of the target backlight area. The grayscale data of each color light source in the target backlight area is compared with the grayscale data of the corresponding color light source in each adjacent backlight area; If the absolute value of the difference between the grayscale data of the target color light source in the target backlight area and the grayscale data of the corresponding color light source in any adjacent backlight area is greater than or equal to a preset threshold, the color light source in the target backlight area is turned off and the white light source in the target backlight area is turned on. The preset threshold is negatively correlated with the resolution of the display device and positively correlated with the size of the display device. The grayscale of the white light source is positively correlated with the number of target adjacent backlight areas, and the target adjacent backlight areas are adjacent backlight areas where the absolute value of the difference between the grayscale data and the grayscale data of the target backlight area is greater than the preset threshold.

5. The display device according to claim 4, characterized in that, The controller is at least one of a backlight driver, a backlight controller, a timing controller, and a system-on-a-chip.

6. A control device for a backlight unit, characterized in that, The backlight unit includes multiple backlight areas, each backlight area including a white light source and multiple colored light sources; the device includes: The acquisition module is used to acquire grayscale data of each colored light source in the target backlight area, as well as grayscale data of each colored light source in multiple adjacent backlight areas of the target backlight area. The comparison module is used to compare the grayscale data of each color light source in the target backlight area with the grayscale data of the corresponding color light source in each adjacent backlight area. The processing module is configured to, when the absolute value of the difference between the grayscale data of the target color light source in the target backlight area and the grayscale data of the corresponding color light source in any adjacent backlight area is greater than or equal to a preset threshold, turn off the color light source in the target backlight area and turn on the white light source in the target backlight area; the preset threshold is negatively correlated with the resolution of the display device and positively correlated with the size of the display device; the grayscale of the white light source is positively correlated with the number of target adjacent backlight areas, and the target adjacent backlight areas are adjacent backlight areas where the absolute value of the difference between the grayscale data and the grayscale data of the target backlight area is greater than the preset threshold.

7. An electronic device, characterized in that, include: Memory, processor; The memory stores computer-executed instructions; The processor executes computer execution instructions stored in the memory, causing the processor to perform the method as described in any one of claims 1-3.

8. A computer-readable storage medium, characterized in that, The computer-readable storage medium stores computer-executable instructions, which, when executed by a processor, are used to implement the method as described in any one of claims 1-3.

9. A computer program product, characterized in that, Includes a computer program that, when executed by a processor, implements the method described in any one of claims 1-3.

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