Display device

Abstract

The application relates to a display device, comprising a liquid crystal display panel, a backlight module and a control circuit. The backlight partition of the backlight module comprises at least one light emitting unit, the light emitting unit comprises a first blue light emitting chip, a green light emitting chip and a red light emitting module, the red light emitting module comprises a second blue light emitting chip and a red phosphor located above the second blue light emitting chip. The control circuit is configured to obtain image frame data, determine input gray scale values of each color pixel in an image partition corresponding to the backlight partition, and generate each color backlight value of the partition; based on the green and red backlight values, the green and second blue light emitting chips are driven, and based on the comparison algorithm processing result of the blue and red backlight values, the first blue light emitting chip is not lit or is driven to perform blue light brightness compensation, thereby improving the display color cast problem. Meanwhile, driving data is generated based on the input gray scale values of each color pixel to drive the panel, thereby improving the display effect of the display device.

Description

Technical Field

[0001] This application relates to the field of display device technology, and in particular to a display device. Background Technology

[0002] With the development of electronic technology, various display devices have emerged. Display devices refer to devices with image output capabilities, including televisions, flat-panel displays, etc., and are widely used in various scenarios such as homes, schools, and businesses.

[0003] Among related technologies, local dimming technology has been proposed, which separately controls the LEDs (Light Emitting Diodes) emitting red, green, and blue light in different areas of the screen to enhance the visual effect. However, traditional display devices suffer from color distortion, affecting the display quality. Summary of the Invention

[0004] This application provides a display device and a driving method for the display device to improve the technical problem of color distortion in traditional display devices and enhance the display effect.

[0005] In a first aspect, a display device is provided, the display device comprising:

[0006] LCD display panel, used to display images;

[0007] A backlight module is used to provide a light source for the liquid crystal display panel; the backlight module includes multiple backlight zones, each backlight zone includes at least one light-emitting unit, each light-emitting unit includes a first blue light-emitting chip, a green light-emitting chip, and a red light-emitting module, the red light-emitting module includes a second blue light-emitting chip and a red phosphor located above the second blue light-emitting chip;

[0008] A control circuit, connected to the liquid crystal display panel and the backlight module, is configured to:

[0009] Acquire image frame data, and determine the input grayscale value of each color pixel in the image partition corresponding to the backlight partition based on the image frame data;

[0010] Based on the input grayscale values ​​of each color pixel in the image partition, the red backlight value, green backlight value, and blue backlight value of the corresponding backlight partition are generated according to the first algorithm.

[0011] The algorithm compares the red and blue backlight values ​​of the backlight zones.

[0012] When the comparison algorithm obtains a first result, within the backlight period corresponding to the current frame, the red backlight value is used to drive the second blue light-emitting chip of the backlight partition, the green backlight value of the backlight partition is used to drive the green light-emitting chip of the backlight partition, and the blue backlight value is not used to drive the first blue light-emitting chip of the backlight partition.

[0013] If the comparison algorithm obtains a second result, then a first processing is performed based on the blue backlight value and red backlight value of the backlight partition to obtain a compensated backlight value. Within the backlight period corresponding to the current frame, the red backlight value is used to drive the second blue light-emitting chip of the backlight partition, the green backlight value is used to drive the green light-emitting chip of the backlight partition, and the compensated backlight value is used to drive the first blue light-emitting chip of the backlight partition to perform blue light brightness compensation.

[0014] Furthermore, pixel driving data is generated based on the input grayscale value of each color pixel and the compensation coefficient of each color pixel to drive the liquid crystal display panel, wherein each of the color pixel compensation coefficients is generated based on at least one factor based on the color backlight value of each backlight zone.

[0015] In the aforementioned display device, during the control process, the control circuit determines the input grayscale value of each color pixel in each image partition based on the image frame data. Based on the input grayscale value of each color pixel in the image partition, it generates the backlight value for the corresponding backlight partition according to a first algorithm. A green backlight chip is driven based on the green backlight value, and a second blue backlight chip is driven based on the red backlight value. The processing result of a comparison algorithm is used to determine the backlight value. When the comparison result is the first result, the green and second blue backlight chips are illuminated, while the first blue backlight chip remains unilluminated. At this time, the red backlight module outputs red light sufficient to meet the red light brightness requirements of the image data and blue light sufficient to meet the blue light brightness requirements. When the comparison result is the second result, the blue light output by the red backlight module cannot meet the blue light brightness requirements of the image data. In this case, the first blue backlight chip is driven based on the compensation backlight value to perform blue light brightness compensation, ensuring that the blue light brightness of the light-emitting unit meets the blue light brightness requirements of the image data. Therefore, the final red, green, and blue luminance is determined by considering the red light emitted from the red phosphor excited by the second blue luminescent chip in the backlight partition, and taking into account the red, green, and blue backlight values ​​to meet the brightness requirements of the image data, thus satisfying the display brightness requirements. By controlling the first blue luminescent chip (which emits blue light independently) to remain unlit when the blue light output from the red luminescent module meets the blue light display brightness requirements, and to ignite the first blue luminescent chip based on a compensation backlight value when the blue light output from the red luminescent module does not meet the blue light display brightness requirements, compared to driving the first blue luminescent chip with the blue backlight value, this method reduces blue light brightness, decreases the possibility of blue light color shift, and improves display polarization issues. Simultaneously, compensation coefficients for each color pixel are generated based on the backlight values ​​of each color. This, in turn, generates pixel driving data based on the input grayscale value and compensation coefficients of each color pixel, thereby adjusting the liquid crystal transmittance of the LCD panel accordingly, improving the final display effect and enhancing the performance of the LCD panel.

[0016] In a second aspect, a display device is provided, the display device comprising:

[0017] LCD display panel, used to display images;

[0018] A backlight module is used to provide a light source for the liquid crystal display panel; the backlight module includes multiple backlight zones, each backlight zone includes at least one light-emitting unit, each light-emitting unit includes a first blue light-emitting chip, a green light-emitting chip, and a red light-emitting module, the red light-emitting module includes a second blue light-emitting chip and a red phosphor located above the second blue light-emitting chip;

[0019] A control circuit, connected to the liquid crystal display panel and the backlight module, is configured to:

[0020] Acquire image frame data, and determine the input grayscale value of each color pixel in the image partition corresponding to the backlight partition based on the image frame data;

[0021] Based on the input grayscale values ​​of each color pixel in the image partition, the red backlight value, green backlight value, and blue backlight value of the corresponding backlight partition are generated according to the first algorithm.

[0022] The corresponding results are queried based on the red and blue backlight values ​​of the backlight zones in a preset mapping relationship, wherein the mapping relationship is the relationship between different combinations of each color backlight value and the driving mode of each color light-emitting chip.

[0023] If the query yields a first result, within the backlight period corresponding to the current frame, the second blue light-emitting chip of the backlight zone is driven according to the red backlight value, the green light-emitting chip of the backlight zone is driven according to the green backlight value, and the blue backlight value is not used to drive the first blue light-emitting chip of the backlight zone.

[0024] If a second result is obtained from the query, a first processing is performed based on the blue backlight value and red backlight value of the backlight partition to obtain a compensated backlight value. Within the backlight period corresponding to the current frame, the red backlight value is used to drive the second blue light-emitting chip of the backlight partition, the green backlight value is used to drive the green light-emitting chip of the backlight partition, and the compensated backlight value is used to drive the first blue light-emitting chip of the backlight partition to perform blue light brightness compensation.

[0025] Furthermore, pixel driving data is generated based on the input grayscale value of each color pixel and the compensation coefficient of each color pixel to drive the liquid crystal display panel, wherein each of the color pixel compensation coefficients is generated based on at least one factor with the backlight value of each color of the backlight partition.

[0026] In the aforementioned display device, during the control process, the control circuit determines the input grayscale value of each color pixel in each image partition based on the image frame data. Based on the input grayscale value of each color pixel in the image partition, it generates the backlight value of the corresponding backlight partition according to a first algorithm. A green backlight chip is driven based on the green backlight value, and a second blue backlight chip is driven based on the red backlight value. Based on the corresponding result of a preset mapping relationship between the blue and red backlight values, when the query result is the first result, the green and second blue backlight chips are illuminated, while the first blue backlight chip is not illuminated. At this time, the red backlight module outputs red light sufficient to meet the red light brightness requirements of the image data and blue light sufficient to meet the blue light brightness requirements. When the query result is the second result, the blue light output by the red backlight module cannot meet the blue light brightness requirements of the image data. In this case, the first blue backlight chip is driven based on the compensation backlight value to perform blue light brightness compensation, so that the blue light brightness of the light-emitting unit meets the blue light brightness requirements of the image data. Therefore, the final red, green, and blue luminance is determined by considering the red light emitted from the red phosphor excited by the second blue luminescent chip in the backlight partition, and taking into account the red, green, and blue backlight values ​​to meet the brightness requirements of the image data, thus satisfying the display brightness requirements. The control method of not illuminating the first blue luminescent chip when the blue light output from the red luminescent module meets the blue light display brightness requirements, and illuminating the first blue luminescent chip based on the compensation backlight value when the blue light output from the red luminescent module does not meet the blue light display brightness requirements, reduces the blue light brightness and the possibility of blue light color shift, improving display polarization issues, compared to driving the first blue luminescent chip with the blue backlight value. Simultaneously, compensation coefficients for each color pixel are generated based on the backlight values ​​of each color. This, in turn, generates pixel driving data based on the input grayscale value and compensation coefficients of each color pixel, thereby adjusting the liquid crystal transmittance of the LCD panel to improve the final display effect and enhance the performance of the LCD panel.

[0027] Thirdly, a driving method for a display device is provided, the method comprising:

[0028] Acquire image frame data, and determine the input grayscale value of each color pixel in the image partition corresponding to the backlight partition based on the image frame data;

[0029] Based on the input grayscale values ​​of each color pixel in the image partition, the red backlight value, green backlight value, and blue backlight value of the corresponding backlight partition are generated according to the first algorithm.

[0030] The algorithm compares the red and blue backlight values ​​of the backlight zones.

[0031] When the comparison algorithm obtains a first result, within the backlight period corresponding to the current frame, the red backlight value is used to drive the second blue light-emitting chip of the backlight partition, the green backlight value of the backlight partition is used to drive the green light-emitting chip of the backlight partition, and the blue backlight value is not used to drive the first blue light-emitting chip of the backlight partition.

[0032] If the comparison algorithm obtains a second result, then a first processing is performed based on the blue backlight value and red backlight value of the backlight partition to obtain a compensated backlight value. Within the backlight period corresponding to the current frame, the red backlight value is used to drive the second blue light-emitting chip of the backlight partition, the green backlight value is used to drive the green light-emitting chip of the backlight partition, and the compensated backlight value is used to drive the first blue light-emitting chip of the backlight partition to perform blue light brightness compensation.

[0033] Furthermore, pixel driving data is generated based on the input grayscale value of each color pixel and the compensation coefficient of each color pixel to drive the liquid crystal display panel, wherein each of the color pixel compensation coefficients is generated based on at least one factor based on the color backlight value of each backlight zone.

[0034] Fourthly, a driving method for a display device is provided, the method comprising:

[0035] Acquire image frame data, and determine the input grayscale value of each color pixel in the image partition corresponding to the backlight partition based on the image frame data;

[0036] Based on the input grayscale values ​​of each color pixel in the image partition, the red backlight value, green backlight value, and blue backlight value of the corresponding backlight partition are generated according to the first algorithm.

[0037] The corresponding results are queried based on the red and blue backlight values ​​of the backlight zones in a preset mapping relationship, wherein the mapping relationship is the relationship between different combinations of each color backlight value and the driving mode of each color light-emitting chip.

[0038] If the query yields a first result, within the backlight period corresponding to the current frame, the second blue light-emitting chip of the backlight zone is driven according to the red backlight value, the green light-emitting chip of the backlight zone is driven according to the green backlight value, and the blue backlight value is not used to drive the first blue light-emitting chip of the backlight zone.

[0039] If a second result is obtained from the query, a first processing is performed based on the blue backlight value and red backlight value of the backlight partition to obtain a compensated backlight value. Within the backlight period corresponding to the current frame, the red backlight value is used to drive the second blue light-emitting chip of the backlight partition, the green backlight value is used to drive the green light-emitting chip of the backlight partition, and the compensated backlight value is used to drive the first blue light-emitting chip of the backlight partition to perform blue light brightness compensation.

[0040] Furthermore, pixel driving data is generated based on the input grayscale value of each color pixel and the compensation coefficient of each color pixel to drive the liquid crystal display panel, wherein each of the color pixel compensation coefficients is generated based on at least one factor with the backlight value of each color of the backlight partition. Attached Figure Description

[0041] To more clearly illustrate the technical solutions in the embodiments of this application or related technologies, the drawings used in the description of the embodiments of this application or related technologies will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0042] Figure 1 Structural diagrams of display devices provided in some embodiments of this application;

[0043] Figure 2 Structural diagrams of display devices provided in other embodiments of this application;

[0044] Figure 3 This is a schematic diagram of the partitioning of a backlight module provided in some embodiments of this application;

[0045] Figure 4 This is a schematic diagram of the structure of a backlight module provided in some embodiments of this application;

[0046] Figure 5 This is a schematic diagram of the structure of a backlight module provided in other embodiments of this application;

[0047] Figure 6 A chromaticity diagram of a display device provided in some embodiments of this application;

[0048] Figure 7 This is a schematic diagram of the driving architecture of a display device provided in some embodiments of this application;

[0049] Figure 8 This application provides schematic diagrams of the driving architecture of a display device according to other embodiments.

[0050] Figure 9This is a schematic diagram of the processing flow of the control circuit in a display device provided in some embodiments of this application;

[0051] Figure 10 A chromaticity diagram of a display device provided for other embodiments of this application. Detailed Implementation

[0052] The 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 represent the same or similar elements. The embodiments described below do not represent all embodiments consistent with this application. They are merely examples of systems and methods consistent with some aspects of this application as detailed in the claims.

[0053] It should be noted that the brief descriptions of terms in this application are only for the convenience of understanding the embodiments described below, and are not intended to limit the embodiments of this application. Unless otherwise stated, these terms should be understood in their ordinary and common meaning.

[0054] The terms "first," "second," "third," etc., used in the specification, claims, and accompanying drawings of this application are used to distinguish similar or related objects or entities, and do not necessarily imply a specific order or sequence, unless otherwise specified. It should be understood that such terms are interchangeable where appropriate.

[0055] The terms “comprising” and “having”, and any variations thereof, are intended to cover but not exclude inclusion, for example, a product or device that includes a range of components is not necessarily limited to all of the components that are clearly listed, but may include other components that are not clearly listed or that are inherent to such product or device.

[0056] The term "module" refers to any known or subsequently developed hardware, software, firmware, artificial intelligence, fuzzy logic, or combination of hardware and / or software code that is capable of performing the functions associated with that element.

[0057] In some embodiments, a display device is provided, which may be a display product such as a liquid crystal display screen, a liquid crystal monitor, or an instrument panel, or a mobile terminal product such as a monitor, a mobile phone, a tablet computer, or a smart photo album. In one application scenario, the display device may be an LCD TV.

[0058] In some exemplary embodiments, such as Figure 1As shown, the display device includes a backlight module 100 and a liquid crystal display panel 200. The backlight module 100 provides a light source for the liquid crystal display panel 200, which is located on the light-emitting side of the backlight module 100 and is used to display images. The liquid crystal display panel 200 has multiple pixels arranged in an array, each pixel including at least a red pixel, a green pixel, and a blue pixel. The transmittance and color of the light incident on each color pixel can be independently controlled so that the light transmitted through all pixels constitutes the image to be displayed.

[0059] In some embodiments, the liquid crystal display panel 200 may include a liquid crystal layer and a color resist layer to modulate the transmittance and color of light incident on the liquid crystal display panel 200 from the backlight module 100. Furthermore, the liquid crystal display panel 200 may also integrate functional layers such as touch electrodes, polarizers, and anti-reflective layers; the process parameters can be adjusted according to actual needs. For example… Figure 2 As shown, the display device also includes an optical film 300, which is disposed between the backlight module 100 and the liquid crystal display panel 200 to homogenize the light emitted by the backlight module 100 and reduce problems such as uneven brightness. It can be understood that, in actual implementation, the display device may also include other components besides... Figure 1 , Figure 2 Other conventional constituent elements besides those shown.

[0060] In some embodiments, the backlight module 100 includes a plurality of light-emitting units arranged in an array. In this embodiment, the backlight module 100 is divided into multiple independently controllable backlight zones, each containing at least one light-emitting unit. The number of zones is not limited and can be determined according to actual display requirements. For example… Figure 3 As shown, the backlight module 100 can be divided into multiple rows (e.g., 50 rows) along the row direction and multiple columns (e.g., 20 columns) along the column direction, thereby dividing the backlight module 100 into 1000 backlight zones. Each zone can independently adjust its brightness and color, realizing the color local dimming function to expand the color reproduction range of the display device and improve dynamic contrast.

[0061] Reference Figure 4 In some embodiments, the light-emitting unit 110 includes a first blue light-emitting chip 111, a green light-emitting chip 112, and a red light-emitting module.

[0062] The red light-emitting module includes a second blue light-emitting chip 113 and a red phosphor 114 located above the second blue light-emitting chip 113. Since the red phosphor is located in the light-emitting path of the second blue light-emitting chip 113, when the second blue light-emitting chip 113 emits blue light, some of the blue light excites the red phosphor 114 and is converted into red light. Therefore, the emitted light of the red light-emitting module includes both unconverted blue light and converted red light. The blue light-emitting chip, green light-emitting chip, and red phosphor emit different wavelengths of light; by mixing light of different wavelengths, the color gamut performance of the backlight module 100 can be optimized.

[0063] In some embodiments, the second blue light-emitting chip 113 and the red phosphor 114 in the light-emitting unit 110 constitute a red light-emitting module as an encapsulation structure.

[0064] In some embodiments, the first blue light-emitting chip 111 and the green light-emitting chip 112 can be separate chips. Alternatively, as... Figure 5 As shown, the first blue light-emitting chip 111 and the green light-emitting chip 112 constitute a package structure.

[0065] In some embodiments, the red phosphor 114 can be selected from phosphor materials with a wide color gamut and high luminous efficiency. For example, K2SiF6:Mn4+ based materials (referred to as KSF phosphors) and / or CaAlSiN3:Eu2+ based nitride red phosphor materials.

[0066] In some embodiments, the chromaticity diagram of the display device is as follows: Figure 6 As shown in the example, point R in the figure represents the primary red color point of the red phosphor, and point R1 represents the primary color point of the red light-emitting chip used in the traditional method. It can be seen that the color saturation using the red light-emitting module of this embodiment is very close to the color saturation using the red light-emitting chip, thus meeting the requirements of a wide color gamut.

[0067] Using a blue LED to excite a red phosphor results in higher luminous efficiency and greater energy savings compared to traditional methods using red LEDs. This allows display devices to combine wide color gamut performance with low power consumption.

[0068] In some embodiments, the backlight module 100 further includes a substrate 120, which serves to support and carry the light. The substrate 120 may be a printed circuit board (PCB), and its shape can be designed according to actual conditions. The substrate 120 is also provided with traces to realize the electrical connection between the light-emitting unit 110 and the control circuit.

[0069] In some embodiments, the display device further includes a control circuit, such as Figure 7As shown, the control circuit 400 is electrically connected to the backlight module 100 and the liquid crystal display panel 200 respectively, and is used to acquire image frame data from the outside to control the backlight module 100 and the liquid crystal display panel 200.

[0070] The control circuit 400 is configured to acquire image frame data and determine the input grayscale value of each color pixel in the image partition corresponding to the backlight partition based on the image frame data; and generate the red backlight value, green backlight value and blue backlight value of the corresponding backlight partition according to the first algorithm based on the input grayscale value of each color pixel in the image partition.

[0071] The control circuit 400 is also configured to compare the red backlight value and the blue backlight value of the backlight partition using an algorithm; or to query the corresponding result based on the red backlight value and the blue backlight value of the backlight partition in a preset mapping relationship, wherein the mapping relationship is the relationship between different combinations of color backlight values ​​and the driving mode of each color light-emitting chip.

[0072] When the comparison algorithm obtains the first result, within the backlight period corresponding to the current frame, the red backlight value is used to drive the second blue light-emitting chip of the backlight zone, the green backlight value of the backlight zone is used to drive the green light-emitting chip of the backlight zone, and the blue backlight value is not used to drive the first blue light-emitting chip of the backlight zone.

[0073] If the comparison algorithm obtains a second result, then the first processing is performed based on the blue backlight value and red backlight value of the backlight zone to obtain the compensation backlight value. Within the backlight cycle corresponding to the current frame, the red backlight value is used to drive the second blue light-emitting chip of the backlight zone, the green backlight value is used to drive the green light-emitting chip of the backlight zone, and the compensation backlight value is used to drive the first blue light-emitting chip of the backlight zone to perform blue light brightness compensation; thereby controlling the light-emitting unit of each light-emitting zone to emit light and providing a light source for the liquid crystal display panel 200.

[0074] In some embodiments, pixel driving data is generated based on the input grayscale value of each color pixel and the compensation coefficient of each color pixel to drive the liquid crystal display panel. The compensation coefficient of each color pixel is generated based on at least one factor according to the backlight value of each color in the backlight partition. The pixel driving data is output to the liquid crystal display panel 200 to control the liquid crystal transmittance corresponding to each color pixel in the liquid crystal display panel 200, thereby enabling the liquid crystal display panel 200 to display image content corresponding to the current image frame data.

[0075] It is understood that when the control circuit 400 executes relevant processing steps to achieve corresponding control, specific steps may be executed by specific devices included in the control circuit 400 according to the different content of the steps, so as to achieve specific implementation effects. This application embodiment does not limit this.

[0076] In some embodiments, such as Figure 8 As shown, the control circuit 400 may include an image quality adjustment unit 410, a dimming control unit 420, a panel controller 430, a peaking control unit 440, and a backlight controller 450.

[0077] The image quality adjustment unit 410 is configured to adjust the sharpness, contrast and color intensity of the received image data and then input it to the dimming control unit 420.

[0078] The dimming control unit 420 is configured to generate red, green, and blue backlight values ​​that determine the brightness of each backlight point in a given area according to a first algorithm, and to provide pixel driving data obtained based on these backlight values ​​to the panel controller 430, thereby enabling the panel controller 430 to drive the liquid crystal display panel 200 based on the pixel driving data. This allows the liquid crystal display panel 200 to display image content corresponding to the current image frame data.

[0079] The dimming control unit 420 is also configured to output each backlight value to the peaking control unit 440. Each backlight value is peaked in the peaking control unit 440 according to the average brightness of the current frame image and then output to the backlight controller 450. The backlight controller 450 generates a backlight driving signal to drive the backlight module 100 to emit light.

[0080] In some embodiments, the image quality adjustment unit 410, the dimming control unit 420, and the peaking control unit 440 can be integrated into a system-on-a-chip, the panel controller 430 can be a timing controller, and the backlight controller 450 can be a backlight driver chip.

[0081] In some embodiments, the control circuit is configured to perform, as Figure 9 The steps are shown. Among them,

[0082] Step 501: Obtain image frame data and determine the input grayscale value of each color pixel in the image partition corresponding to the backlight partition based on the image frame data.

[0083] In some embodiments, the image frame data is the image data of the current frame, typically in RGB format. After receiving the image frame data, the control circuit first performs Gamma decoding on the RGB format image data to convert it into a quantity that is linearly related to light intensity. Then, it divides the image data according to the partitions of the backlight module to obtain partition data for each backlight partition.

[0084] In some embodiments, the partition data includes the input grayscale values ​​of each color pixel in the image partition, namely the red input grayscale value (Rin) of each red pixel, the green input grayscale value (Gin) of each green pixel, and the blue input grayscale value (Bin) of each blue pixel. These three input grayscale values ​​of color pixels together determine the color and brightness of each pixel in the image.

[0085] Each input grayscale value typically takes a value within a specific range. For example, in an 8-bit image, the grayscale value ranges from 0 to 255, where 0 represents the minimum brightness of that color channel (i.e., no color component) and 255 represents the maximum brightness of that color channel.

[0086] In some embodiments, after the control circuit acquires the image frame data, it can further adjust the image frame data in terms of sharpness, contrast, and color intensity before linearizing it.

[0087] Step 502: Generate the red backlight value, green backlight value and blue backlight value of the corresponding backlight partition according to the input grayscale value of each color pixel in the image partition and the first algorithm.

[0088] In some embodiments, the first algorithm may select a maximum value extraction algorithm, an average value extraction algorithm, or a mixed value extraction algorithm as appropriate.

[0089] When the first algorithm is the maximum value extraction algorithm, the control circuit performs regional feature extraction on the partition data of each image partition to extract the maximum value Max(R) of the red input grayscale value (Rin), the maximum value Max(G) of the green input grayscale value (Gin), and the maximum value Max(B) of the blue input grayscale value (Bin) in each partition data. The maximum red input grayscale value Max(R) in the partition data is used as the red backlight value of the corresponding backlight partition, the maximum green input grayscale value Max(G) is used as the green backlight value, and the maximum blue input grayscale value Max(B) is used as the blue backlight value.

[0090] When the first algorithm is the average value extraction algorithm, the control circuit performs regional feature extraction on the partition data of each image partition to extract the average value of the red input grayscale value (Rin), green input grayscale value (Gin), and blue input grayscale value (Gin) in each partition data. The average value of the red input grayscale value (Rin) in the partition data is used as the red backlight value of the corresponding backlight partition, the average value of the green input grayscale value (Gin) is used as the green backlight value, and the average value of the blue input grayscale value (Gin) is used as the blue backlight value.

[0091] When the first algorithm is a blending value extraction algorithm, the control circuit performs regional feature extraction on the partition data of each image partition to extract the maximum and average values ​​of the red input grayscale value (Rin), green input grayscale value (Gin), and blue input grayscale value (Gin) in each partition data. The maximum and average values ​​of the red input grayscale value (Rin) in the partition data are then blended according to a preset weight, and the blended value is used as the red backlight value of the corresponding backlight partition; the maximum and average values ​​of the green input grayscale value (Gin) are blended according to a preset weight, and the blended value is used as the green backlight value; the maximum and average values ​​of the blue input grayscale value (Gin) are blended according to a preset weight, and the blended value is used as the blue backlight value.

[0092] Among the aforementioned methods for obtaining backlight values, the maximum value extraction algorithm is suitable for high-contrast scenes. The average value extraction algorithm is energy-efficient but may reduce details in bright areas. When using the blended value extraction algorithm, the preset weights can be dynamically adjusted according to the image content (e.g., in high dynamic range scenes, the weight of the maximum value can be increased to blend more maximum values).

[0093] Step 503: Compare the red backlight value and blue backlight value of the backlight zone using an algorithm.

[0094] In some embodiments, the control circuit compares the red backlight value and the blue backlight value of each backlight zone.

[0095] In some embodiments, the comparison method may be a difference or a ratio comparison method, which directly compares or weights the two to obtain the corresponding comparison result.

[0096] When the comparison algorithm obtains the first result, the brightness of the red light-emitting module of the backlight zone that is not converted into blue light can meet the brightness requirement corresponding to the blue backlight value.

[0097] When the comparison algorithm produces the second result, the brightness of the unconverted blue light emitted by the red light-emitting module of the backlight zone cannot meet the brightness requirement corresponding to the blue backlight value.

[0098] In some embodiments, the comparison results obtained by each backlight partition may be the same or different, and the control circuit will perform corresponding control according to the comparison results of each backlight partition. For example, in the current frame, if the comparison result of the first backlight partition is the first result and the comparison result of the second backlight partition is the second result, then the control circuit will execute step 504 to control the first backlight partition and execute step 505 to control the second backlight partition within the backlight period corresponding to the current frame.

[0099] Step 504: Within the backlight period corresponding to the current frame, the red backlight value is used to drive the second blue light-emitting chip of the backlight partition, the green backlight value of the backlight partition is used to drive the green light-emitting chip of the backlight partition, and the blue backlight value is not used to drive the first blue light-emitting chip of the backlight partition.

[0100] Within the backlight cycle corresponding to the current frame, the control circuit synchronously drives each second blue light-emitting chip and each green light-emitting chip in the backlight partition to emit light, while each first blue light-emitting chip does not emit light.

[0101] In some embodiments, the control circuit generates a corresponding backlight driving signal based on the green backlight value of the backlight zone, driving the green light-emitting chip to emit light. The brightness of the green light emitted by the green light-emitting chip can match the brightness requirement corresponding to the green backlight value (the brightness of the green light is equal to the brightness corresponding to the green backlight value, or the difference between the two is within an acceptable range).

[0102] The control circuit generates a corresponding backlight drive signal based on the red backlight value of the backlight zone, driving the second blue LED to emit light, so that the brightness of the red light emitted by the red LED module matches the brightness requirement corresponding to the red backlight value. At this time, the brightness of the blue light emitted by the red LED module can meet the brightness requirement corresponding to the blue backlight value, and it is not necessary to light up the first blue LED.

[0103] When the light-emitting chip is driven to light up according to the backlight value, the same color light-emitting chips in the same backlight zone will be supplied with the same driving signal (e.g., the same driving current and / or the same duty cycle PWM signal) to ensure that their light intensity is consistent and improve backlight consistency.

[0104] Step 505: Perform a first processing based on the blue backlight value and red backlight value of the backlight partition to obtain a compensated backlight value. Within the backlight period corresponding to the current frame, the red backlight value is used to drive the second blue light-emitting chip of the backlight partition, the green backlight value is used to drive the green light-emitting chip of the backlight partition, and the compensated backlight value is used to drive the first blue light-emitting chip of the backlight partition to perform blue light brightness compensation.

[0105] In some embodiments, within the backlight cycle corresponding to the current frame, the control circuit synchronously drives each first blue light-emitting chip, each second blue light-emitting chip, and each green light-emitting chip of the backlight partition to emit light.

[0106] For example, the control circuit generates a corresponding backlight driving signal based on the green backlight value of the backlight zone, driving the green light-emitting chip to emit light. The brightness of the green light emitted by the green light-emitting chip can match the brightness requirement corresponding to the green backlight value.

[0107] Based on the red backlight value of the backlight partition, a corresponding backlight driving signal is generated to drive the second blue light-emitting chip to emit light, so that the brightness of the red light emitted by the red light-emitting module matches the brightness requirement corresponding to the red backlight value.

[0108] Since the brightness of the blue light emitted by the red light-emitting module cannot meet the brightness requirements corresponding to the blue backlight value, it is necessary to perform a first processing based on the blue backlight value and the red backlight value of the backlight zone to obtain a compensated backlight value, and then generate a corresponding backlight driving signal based on the compensated backlight value to drive the first blue light-emitting chip to emit light.

[0109] The blue light brightness of the light-emitting unit is the mixed brightness of the unconverted blue light brightness in the emitted light of the red light-emitting module and the blue light brightness generated by the first blue light-emitting chip. The blue light brightness of the light-emitting unit can match the brightness requirements corresponding to the blue backlight value.

[0110] Step 506: Generate pixel driving data based on the input grayscale value of each color pixel and the compensation coefficient of each color pixel to drive the liquid crystal display panel.

[0111] The compensation coefficients for each color pixel are generated based on at least one factor, which is the color backlight value of each backlight zone.

[0112] In some embodiments, at the liquid crystal display panel driving level, the control circuit generates precise pixel driving data based on the input grayscale value of each color pixel and a pixel compensation coefficient dynamically generated based on the backlight value of the backlight partition. The liquid crystal display panel is driven based on this pixel driving data to synchronously adjust the transmittance of the liquid crystal corresponding to each pixel. This, in turn, through the synergistic effect of partitioned backlight control and pixel compensation, accurately displays the image content.

[0113] The driving brightness and emission color of each backlight zone in the backlight module can be controlled independently, which significantly improves the range of color reproduction.

[0114] In some embodiments, the backlight partition includes at least one light-emitting unit, and the second blue light-emitting chip in the light-emitting unit can excite a red phosphor to produce red light. Since the luminous efficiency of the blue light-emitting chip is higher than that of the red light-emitting chip, energy consumption can be reduced while maintaining a wide color gamut compared to directly using a red light-emitting chip to emit red light.

[0115] During the control process, backlight values ​​for corresponding backlight zones are generated according to the input grayscale values ​​of each color pixel in the image partition using a first algorithm. A green backlight value drives a green LED, and a red backlight value drives a second blue LED. Based on the comparison algorithm between the blue and red backlight values, the first blue LED is either not illuminated or is illuminated to compensate for the backlight value, thus providing blue light brightness compensation. This ensures that the final red, green, and blue light brightness is determined based on the red light emitted from the second blue LED in the backlight zone, taking into account the red, green, and blue backlight values, and meeting the brightness requirements of the image data, thus satisfying the display brightness requirements. By controlling the first blue LED—which emits blue light independently when the blue light output from the red LED module meets the blue light display brightness requirements, and by illuminating the first blue LED based on the compensation backlight value when the blue light output from the red LED module does not meet the blue light display brightness requirements—compared to driving the first blue LED with the blue backlight value, this method reduces blue light brightness, decreases the possibility of blue light color shift, and improves display polarization issues.

[0116] Furthermore, compensation coefficients for each color pixel are generated based on the backlight values ​​of each color. Then, driving data for each pixel is generated based on the input grayscale values ​​and compensation coefficients of each color pixel. This allows for the adjustment of the liquid crystal transmittance of the liquid crystal display panel, thereby improving the final display effect and enhancing the performance of the liquid crystal display panel.

[0117] In some embodiments, the control circuit is configured to perform the following steps.

[0118] Acquire image frame data and determine the input grayscale value of each color pixel in the image partition corresponding to the backlight partition based on the image frame data.

[0119] Based on the input grayscale values ​​of each color pixel in the image partition, the first algorithm generates the red backlight value, green backlight value, and blue backlight value of the corresponding backlight partition.

[0120] The corresponding results are retrieved based on the preset mapping relationship between the red and blue backlight values ​​of the backlight zones.

[0121] The mapping relationship, which relates different combinations of backlight values ​​for each color to the driving mode of each color-emitting chip, is pre-stored in the control circuit. The form of this mapping relationship is not limited; it can be a mapping table, a mapping function, or other forms.

[0122] If the query yields the first result, when the red light-emitting module of the backlight zone emits light, the brightness of the unconverted blue light is sufficient to meet the brightness requirement corresponding to the blue backlight value. If the query yields the second result, when the red light-emitting module of the backlight zone emits light, the brightness of the unconverted blue light is insufficient to meet the brightness requirement corresponding to the blue backlight value.

[0123] The query results obtained by each backlight zone may be the same or different, and the control circuit will perform corresponding control according to the query results of each backlight zone.

[0124] For example, in the current frame, if the query result based on the first backlight partition is the first result and the query result based on the second backlight partition is the second result, then the control circuit will, within the backlight cycle corresponding to the current frame, drive the second blue LED of the first backlight partition using the red backlight value of the first backlight partition, drive the green LED of the first backlight partition using the green backlight value of the first backlight partition, and not use the blue backlight value of the first backlight partition to drive the first blue LED of the first backlight partition, thereby controlling the first backlight partition. Within the backlight cycle corresponding to the current frame, drive the second blue LED of the second backlight partition using the red backlight value of the second backlight partition, drive the green LED of the second backlight partition using the green backlight value of the second backlight partition, and drive the first blue LED of the second backlight partition using the compensation backlight value to perform blue light brightness compensation, thereby controlling the second backlight partition.

[0125] In driving the LCD panel, the control circuit generates driving data for each pixel based on the input grayscale value of each color pixel and the compensation coefficient of each color pixel to drive the LCD panel.

[0126] In the aforementioned display device, the second blue light-emitting chip in the light-emitting unit can excite a red phosphor to produce red light. Compared to directly using a red light-emitting chip to emit red light, this reduces energy consumption while maintaining a wide color gamut.

[0127] During the control process, the green backlight value drives the green LED chip, and the red backlight value drives the second blue LED chip. Based on the query results of the blue and red backlight values, the first blue LED chip is either not illuminated or is illuminated to compensate for the backlight value, thus compensating for blue light brightness. This ensures that the final red, green, and blue light brightness meets the display brightness requirements. By controlling the first blue LED chip—which emits blue light independently—to remain unilluminated when the blue light brightness output from the red LED module meets the blue light display brightness requirements, and by illuminating the first blue LED chip based on the compensation backlight value when the blue light brightness output from the red LED module does not meet the blue light display brightness requirements, compared to driving the first blue LED chip with the blue backlight value, this control method reduces blue light brightness, decreases the possibility of blue light color shift, and improves display polarization issues.

[0128] In some embodiments, the control circuit implements dual regulation of the luminous brightness and luminous color of each backlight zone. Adjacent zones may influence each other. This application's embodiments are described using the case where there is no light influence from adjacent areas. If the influence of adjacent zones is considered, the control circuit will also combine the backlight overflow from adjacent areas to its own area to modify the backlight value of this zone, and then generate pixel driving data based on each color backlight value, so that the image finally displayed on the liquid crystal display panel is consistent with the image to be displayed.

[0129] In some embodiments, the red and blue backlight values ​​of the backlight partitions are compared using an algorithm or a mapping relationship is queried. The resulting first result indicates that, within the backlight period corresponding to the current frame, if the red backlight value is used to drive the second blue light-emitting chip to excite the red phosphor, the brightness of the unconverted blue light can meet the blue backlight brightness requirement within that backlight period. The second result indicates that, within the backlight period corresponding to the current frame, if the red backlight value is used to drive the second blue light-emitting chip to excite the red phosphor, the brightness of the unconverted blue light does not meet the blue backlight brightness requirement within that backlight period.

[0130] When the first result is obtained, within the backlight cycle corresponding to the current frame, the red light obtained by the red phosphor of the second blue light-emitting chip, the unconverted blue light, and the green light output by the green light-emitting chip together constitute the mixed backlight of the partition to ensure display requirements, while turning off the first blue light-emitting chip can save energy.

[0131] When the result obtained is the second result, within the backlight cycle corresponding to the current frame, the red light obtained by converting the emitted light from the second blue light-emitting chip through the red phosphor, the unconverted blue light, the blue light output from the first blue light-emitting chip, and the green light output from the green light-emitting chip together constitute the mixed backlight of that zone. Therefore, by dynamically adjusting the compensation backlight value and controlling the brightness of the blue light output from the first blue light-emitting chip, the final mixed backlight's blue light brightness meets the display requirements, ensuring the display effect of the display device.

[0132] The processing method for the first process is not unique. In some embodiments, the first process includes interpolation algorithm processing.

[0133] In some embodiments, when the comparison algorithm processes or queries to obtain a second result, the control circuit calculates the blue backlight value and red backlight value of each backlight zone according to the difference algorithm, and uses the obtained difference result as a compensation backlight value. This compensation backlight value can be used to precisely control the luminous brightness of the first blue light-emitting chip and optimize the color performance of the displayed image.

[0134] In some embodiments, when the second blue light-emitting chip emits light, the ratio of the brightness of the red light converted by the red phosphor to the brightness of the unconverted blue light remains stable and does not change with the backlight value. Since this ratio is constant, there is no need to consider the impact of changes in the backlight value on this ratio. The compensation backlight value determined based on the difference between the blue and red backlight values ​​is accurate and reliable, ultimately ensuring that the display screen can meet the expected color performance under different brightness conditions.

[0135] In other embodiments, the first process includes querying based on a preset backlight mapping relationship.

[0136] The control circuit pre-stores the backlight mapping relationship between blue backlight values, red backlight values, and compensation backlight values. This backlight mapping relationship includes different combinations of color backlight values ​​and supplementary backlight values, as well as the relationship between the driving methods of each light-emitting chip. Its form is not limited; for example, it can be a backlight mapping table, a backlight mapping function, or a backlight mapping curve.

[0137] After obtaining the blue and red backlight values ​​of the backlight zones, the control circuit can obtain the corresponding compensation backlight value by querying a preset backlight mapping relationship. This method eliminates the need for calculations and can quickly determine the blue light compensation value to synchronously drive the color-emitting chips in each backlight zone, thereby improving the backlight display effect.

[0138] In some embodiments, the brightness of the red light-emitting module under red backlight value without conversion to blue light is the same as the brightness of the converted red light. The brightness of the red light-emitting module under red backlight value without conversion to blue light is equivalent to the brightness of the blue light obtained by driving the first blue light-emitting chip with red backlight value.

[0139] In some embodiments, the algorithm for comparing the red backlight value and the blue backlight value of the backlight partition includes the following steps: directly comparing the red backlight value and the blue backlight value of the backlight partition; if the red backlight value is greater than or equal to the blue backlight value, determining the comparison result as the first result; if the red backlight value is less than the blue backlight value, determining the comparison result as the second result.

[0140] The difference algorithm is performed based on the blue backlight value and the red backlight value of the backlight zone, including: subtracting the blue backlight value from the red backlight value and using the difference as the compensation backlight value.

[0141] Taking the first algorithm as the maximum value extraction algorithm as an example, the control circuit determines the backlight value according to the following formulas 1, 2, and 3. Among them,

[0142] Green backlight value GLED = max(G) Formula 1;

[0143] Compensation backlight value BLED1 = max(B) - max(R) Formula 2;

[0144] Red backlight value Mg(BLED2) = max(R) Formula 3.

[0145] Please see Figure 10 , Figure 10 The line in the chromaticity diagram shows the connection between the green primary color point G and the white point. In the region to the right of this line, the red backlight value is always greater than the blue backlight value, and the comparison or query result is the first result. As shown in Formula 3, the second blue light-emitting chip can be controlled to illuminate and excite the red phosphor based on the red backlight value, thus obtaining the red light with the required brightness for red display. At this time, the brightness of the unconverted blue light emitted by the second blue light-emitting chip is greater than the brightness corresponding to the blue backlight value, which can meet the requirements of blue light display.

[0146] The compensation backlight value obtained in Formula 2 for controlling the first light-emitting chip may be negative. Since it is impossible to control the brightness of the light-emitting chip to be negative, it will be fixed at the minimum value of 0. That is, the compensation backlight value BLED1 will not be used to drive the first blue light-emitting chip, and the first blue light-emitting chip will not light up.

[0147] Furthermore, when the right-hand area of ​​the line is the first result of the comparison or query, the backlight value can also be determined using the following formulas 4, 5, and 6.

[0148] Green backlight value GLED = max(G) Formula 4;

[0149] Compensation backlight value BLED1 = 0 (Formula 5);

[0150] Red backlight value Mg(BLED2) = max(R) Formula 6.

[0151] for Figure 10 In the area to the left of the central line, the blue backlight value is always greater than the red backlight value, and the comparison or query result is the second result. At this time, the backlight values ​​used to control each light-emitting chip are also calculated according to Formulas 1, 2, and 3. The green backlight value is shown in Formula 1, and the red backlight value is shown in Formula 3. Since... Figure 10 The left region always satisfies Max(B) > Max(R), and the required blue light brightness is equivalent to the brightness corresponding to Max(B) - max(R). Therefore, the first blue light-emitting chip needs to be lit to compensate for the brightness that cannot be achieved by lighting the second blue light-emitting chip.

[0152] In some embodiments, the red backlight value and blue backlight value of the backlight zone are directly compared to clearly distinguish the comparison results under different color scenes. The difference between the blue backlight value and the red backlight value is obtained by combining the formula, thereby realizing precise control of the backlight zone of the display device and improving the display effect of the display device.

[0153] In some embodiments, the ratio between the brightness of the red light-emitting module under red backlight value without converting to blue light and the brightness of the converted red light is defined as a preset ratio, so that the brightness of the red light-emitting module under red backlight value without converting to blue light is equivalent to the brightness of the blue light obtained by driving the first blue light-emitting chip with the backlight value obtained by multiplying the red backlight value and the preset ratio.

[0154] In some embodiments, regardless of how the red backlight value is adjusted, the ratio between the brightness of the unconverted blue light and the brightness of the converted red light is always maintained at a preset ratio. The equivalent blue backlight value calculated by the control circuit based on the actual red light brightness requirement of the displayed content (red backlight value) and the preset ratio is more accurate, and can ultimately precisely adjust the luminous brightness of the first blue light-emitting chip to improve color reproduction.

[0155] In some embodiments, the algorithm for comparing the red backlight value and the blue backlight value of the backlight zone includes the following steps:

[0156] The product of the red backlight value and the preset ratio of the backlight zones is compared with the blue backlight value. If the product of the red backlight value and the preset ratio is greater than or equal to the blue backlight value, the comparison result is determined as the first result. If the product of the red backlight value and the preset ratio is less than the blue backlight value, the comparison result is determined as the second result.

[0157] Therefore, the product of the red backlight value and the preset ratio represents the backlight value corresponding to the blue light brightness output by the red light-emitting module when the second blue light-emitting chip in the red light-emitting module emits light based on the red backlight value. Comparing this value with the blue backlight value indicates whether the blue light output by the red light-emitting module when the second blue light-emitting chip is lit can meet the blue light requirements of the displayed image. This comparison algorithm quantifies the blue light brightness obtainable by the red light-emitting module into a backlight value. The comparison result based on this is accurate and reliable, leading to more precise control of subsequent light-emitting chips and a better backlight display effect.

[0158] In some embodiments, querying the corresponding result based on a preset mapping relationship between the red and blue backlight values ​​of the backlight zones may include:

[0159] The system queries the corresponding results based on a preset mapping relationship between the red backlight value of the backlight zone and a preset ratio, and the blue backlight value. If the product of the red backlight value and the preset ratio is greater than or equal to the blue backlight value, the query result is the first result; if the product of the red backlight value and the preset ratio is less than the blue backlight value, the query result is the second result. The mapping relationship includes different combinations of the red backlight value and the preset ratio, and the blue backlight value, and their relationship to the driving methods of each color-emitting chip; this relationship is pre-stored in the control circuit.

[0160] In some embodiments, the query result is obtained by multiplying the red backlight value of the backlight partition by a preset ratio and the blue backlight value in a preset mapping relationship. If the product of the red backlight value and the preset ratio is greater than or equal to the blue backlight value, the query result is a first result, the driving backlight value of the first blue light-emitting chip is 0, and the first blue light-emitting chip is not driven according to the blue backlight value; and if the product of the red backlight value and the preset ratio is less than the blue backlight value, the query result is a second result, the driving backlight value of the first blue light-emitting chip is greater than 0 and less than or equal to the blue backlight value, and the first blue light-emitting chip is driven according to the driving backlight value.

[0161] In some embodiments, the product of the red backlight value and a preset ratio, and the ratio between the red backlight value and the blue backlight value, can be determined as a first result if the ratio exceeds a second threshold, and as a second result if the ratio does not exceed the second threshold.

[0162] The second threshold can be set to 1. When the ratio between the product and the blue backlight value exceeds 1, it indicates that when the second blue backlight chip is driven by the red backlight value, the blue light brightness output by the red light-emitting module is higher than the brightness corresponding to the blue backlight value. In this case, the result of the comparison algorithm or query is determined as the first result. When the ratio does not exceed 1, it indicates that the brightness corresponding to the blue backlight value is greater than or equal to the blue light brightness output by the red light-emitting module when the second blue backlight chip is driven by the red backlight value. In this case, it is determined as the second result. In practical implementation, considering the potential for component performance fluctuations and other error factors during the actual operation of the display device, the second threshold can also be set to 1 ± a certain allowable error range to improve the accuracy of the comparison results under different operating conditions. In some embodiments, the difference between the product of the red backlight value and the preset ratio and the blue backlight value exceeding 0 can also be determined as the first result, and the difference not exceeding 0 can be determined as the second result.

[0163] In some embodiments, the control circuit determines the first result or the second result in a flexible manner. For example, when the blue backlight value is 0, it can be determined as the first result; when the blue backlight value is greater than 0, the product is compared with the blue backlight value to determine the result as either the first result or the second result. The comparison method is not limited; the comparison result can be determined based on the ratio between the product and the blue backlight value and the relationship between a second threshold; alternatively, it can be determined based on the relationship between the difference between the product and the blue backlight value and 0.

[0164] The control circuit can also determine the comparison result based on the relationship between the ratio and the second threshold when the blue backlight value is greater than 0; and determine the comparison result based on the relationship between the difference and 0 when the blue backlight value is 0.

[0165] In some embodiments, when the result is determined to be the second result, the step of performing a difference algorithm processing based on the blue backlight value and the red backlight value of the backlight partition includes: determining the difference between the blue backlight value of the backlight partition and the product of the red backlight value and a preset ratio as a compensation backlight value.

[0166] Taking the first algorithm as the maximum value extraction algorithm as an example, the control circuit determines the backlight value according to the following formulas 7, 8, and 9. Among them,

[0167] Green backlight value GLED = max(G) Formula 7;

[0168] Compensation backlight value BLED1 = max(B) - max(R) × K (Formula 8)

[0169] Red backlight value Mg(BLED2) = max(R) Formula 9.

[0170] Where K represents the preset ratio, and its value ranges from 0 to 1.

[0171] When the comparison or query result is the second result, it means that the blue light brightness output by the red light-emitting module cannot meet the brightness requirements corresponding to the blue backlight value. In this case, the difference between the product of the blue backlight value of the backlight zone and the red backlight value plus a preset ratio is determined as the compensation backlight value. This accurately quantifies the portion of the blue backlight that exceeds the red backlight value after equivalent processing. This calculation method considers the difference between the red backlight value after conversion by the preset ratio and the blue backlight value, making the calculation result of the compensation backlight value more accurate. Adjusting the first blue light-emitting chip based on this compensation backlight value ensures that the blue light brightness matches the display requirements, thus ensuring the display effect of the display device.

[0172] In some embodiments, when the result is determined to be the second result, the step of performing a first processing based on the blue backlight value and the red backlight value of the backlight partition includes: performing a query processing based on the product of the blue backlight value of the backlight partition, the red backlight value, and a preset ratio, according to a preset backlight mapping relationship.

[0173] The backlight mapping relationship includes different combinations of the product of the blue backlight value, the red backlight value, and a preset ratio, along with supplementary backlight values, and the relationship between the driving methods of each light-emitting chip. After calculating the product of the red backlight value and the preset ratio, a supplementary backlight value can be obtained by combining the blue backlight value and the backlight mapping relationship. This supplementary backlight value is then used to drive the first blue light-emitting chip, ensuring that the blue light brightness matches the display requirements.

[0174] In some embodiments, the control circuit is configured to perform the following steps:

[0175] When the red backlight value is 0, within the backlight period corresponding to the current frame, the second blue light-emitting chip of the backlight partition is driven according to the red backlight value, the green light-emitting chip of the backlight partition is driven according to the green backlight value, and the first blue light-emitting chip of the backlight partition is driven according to the blue backlight value.

[0176] Alternatively, if the red backlight value is less than the first threshold, then within the backlight period corresponding to the current frame, the second blue light-emitting chip of the backlight partition is driven according to the red backlight value, the green light-emitting chip of the backlight partition is driven according to the green backlight value, and the first blue light-emitting chip of the backlight partition is driven according to the blue backlight value.

[0177] In practical implementation, when the red backlight value of a display zone is 0, the second blue light-emitting chip of that display zone can be left undriven. The green light-emitting chips of the backlight zone are driven to emit light synchronously based on the green backlight value, and the first blue light-emitting chips of the backlight zone are driven to emit light synchronously based on the blue backlight value.

[0178] The first threshold is a positive number, and its value can be set according to actual conditions, such as based on a preset ratio. As an example, when the product of the red backlight value and the preset ratio is very small, indicating that the blue light emitted by the red backlight module is very low and negligible when the second blue backlight chip is driven by the red backlight value, this red backlight value is used as the first threshold. Therefore, when the red backlight value is below the first threshold, the second blue backlight chips in each backlight zone are driven to emit light synchronously based on the red backlight value, the green backlight chips in each backlight zone are driven to emit light synchronously based on the green backlight value, and the first blue backlight chips in each backlight zone are driven to emit light synchronously based on the blue backlight value. This ensures that the blue light output brightness of this zone matches the display requirements, enabling the display device to have both wide color gamut performance and low power consumption.

[0179] In some embodiments, the step of generating pixel driving data to drive the liquid crystal display panel based on the input grayscale value of each color pixel and the compensation coefficient of each color pixel includes the following steps:

[0180] The green pixel compensation coefficient is determined based on the green backlight value; grayscale compensation is performed on the green pixels in the image partition according to the green pixel compensation coefficient to generate green correction data corresponding to each green pixel, and the green pixels of the liquid crystal display panel are driven according to the green correction data.

[0181] The red pixel compensation coefficient is determined based on the red backlight value; grayscale compensation is performed on the red pixels in the image partition according to the red pixel compensation coefficient to generate red correction data corresponding to each red pixel, and the red pixels of the LCD panel are driven according to the red correction data.

[0182] In the case of the first result, the blue pixel compensation coefficient is determined based on the red backlight value; in the case of the second result, the blue pixel compensation coefficient is determined based on the blue backlight value; and, grayscale compensation is performed on the blue pixels in the image partition based on the determined blue pixel compensation coefficient to generate blue correction data corresponding to each blue pixel, and the blue pixels of the liquid crystal display panel are driven based on the blue correction data.

[0183] In some embodiments, the control circuit obtains the green pixel compensation coefficient based on the green backlight value of each backlight zone, and iterates through all green pixels in the image zone corresponding to each backlight zone. For each green pixel, it generates its green correction data based on the corresponding compensation coefficient (the green pixel compensation coefficient of the backlight zone corresponding to its image zone). Then, based on the green correction data of each green pixel, it drives each green pixel of the liquid crystal panel to adjust the transmittance of the liquid crystal molecules to achieve grayscale compensation, so that green pixels at different positions can be accurately displayed according to the corrected grayscale value.

[0184] The control circuit also obtains the red pixel compensation coefficient based on the red backlight value of each backlight zone, and iterates through all red pixels in the image zone corresponding to each backlight zone. For each red pixel, it generates its red correction data based on the corresponding compensation coefficient (the red pixel compensation coefficient of the backlight zone corresponding to its image zone). Then, based on the red correction data of each red pixel, it drives each red pixel of the LCD panel to adjust the transmittance of the liquid crystal molecules to achieve grayscale compensation, so that red pixels at different positions can be accurately displayed according to the corrected grayscale value.

[0185] When the comparison or query result is the first result, the control circuit determines the blue pixel compensation coefficient based on the corresponding red backlight value with higher luminance. When the comparison or query result is the second result, the control circuit determines the blue pixel compensation coefficient based on the corresponding blue backlight value with higher luminance. Then, it iterates through all blue pixels within the image partition corresponding to each backlight partition. For each blue pixel, it generates blue correction data based on the corresponding compensation coefficient (the blue pixel compensation coefficient of the backlight partition corresponding to its image partition). Based on the blue correction data of each blue pixel, it drives each blue pixel of the LCD panel to adjust the transmittance of the liquid crystal molecules to achieve grayscale compensation, thereby enabling blue pixels at different positions to be accurately displayed according to the corrected grayscale values.

[0186] In some embodiments, the pixel driving data includes green correction data for each green pixel, red correction data for each red pixel, and blue correction data for each blue pixel. By determining the compensation coefficient for each color pixel, and then performing grayscale compensation on each color pixel based on the compensation coefficient and precisely driving the corresponding pixels of the liquid crystal panel, each color pixel can be precisely adjusted according to the backlight conditions and display requirements of its respective zone, ultimately achieving accurate display of all colors in the entire image and improving the display effect of the display device.

[0187] In some embodiments, the step of performing grayscale compensation on the green pixels within the image partition according to the green pixel compensation coefficient to generate green correction data corresponding to each green pixel includes the following steps:

[0188] The green correction data corresponding to each green pixel in the image partition is generated by multiplying the green pixel compensation coefficient and the green input grayscale value of each green pixel in the image partition.

[0189] The steps involve performing grayscale compensation on the red pixels within the image partition based on the red pixel compensation coefficient to generate red correction data corresponding to each red pixel, including the following steps:

[0190] The red correction data corresponding to each red pixel in the image partition is generated by multiplying the red pixel compensation coefficient and the red input grayscale value of each red pixel in the image partition.

[0191] The steps involve performing grayscale compensation on the blue pixels within the image partition based on the determined blue pixel compensation coefficients to generate blue correction data corresponding to each blue pixel, including the following steps:

[0192] Based on the determined blue pixel compensation coefficient and the product of the blue input grayscale value of each blue pixel in the image partition, the blue correction data corresponding to each blue pixel in the image partition is generated.

[0193] In some embodiments, the green pixel compensation coefficient, red pixel compensation coefficient, and blue pixel compensation coefficient are obtained based on the backlight value used to drive the luminance of each light-emitting chip within the backlight partition. The green input grayscale value of each green pixel, the red input grayscale value of each red pixel, and the blue input grayscale value of each blue pixel are all original input grayscale values, which can reflect the quantized brightness of the green, red, and blue channels of the image data at each pixel position.

[0194] By using the product of the green input grayscale value of each green pixel and the corresponding green pixel compensation coefficient as its green correction data, the brightness of each green pixel can be adjusted in a targeted manner to compensate for the green display deviation caused by backlight factors.

[0195] By using the product of the red input grayscale value of each red pixel and the corresponding red pixel compensation coefficient as its red correction data, the brightness of each red pixel can be adjusted in a targeted manner to compensate for the red display deviation caused by backlight factors.

[0196] By using the product of the blue input grayscale value of each blue pixel and the corresponding blue pixel compensation coefficient as its blue correction data, the brightness of each blue pixel can be adjusted in a targeted manner to compensate for the blue display deviation caused by backlight factors.

[0197] This ensures the display quality of the green, red, and blue parts of the image, thereby improving the display quality of the display device.

[0198] In some embodiments, the step of determining the green pixel compensation coefficient based on the green backlight value includes: determining the green pixel compensation coefficient based on the reciprocal of the green backlight value.

[0199] The control circuit can use the reciprocal of the green backlight value as the green compensation coefficient, or multiply the reciprocal of the green backlight value by a specific coefficient, and use the result as the green compensation coefficient. The specific coefficient can be obtained based on experience or experiments and stored in advance in the control circuit.

[0200] As an example, the first algorithm is a maximum value extraction algorithm, where the green backlight value of the backlight partition is the maximum value Max(G) of the green input grayscale value (Gin) of each green pixel in the corresponding image partition. The green pixel compensation coefficient is the reciprocal of the green backlight value, i.e., 1 / max(G).

[0201] Furthermore, for each green pixel, the product of its input grayscale value and the green pixel compensation coefficient of its corresponding zone is used as its green correction data, i.e., the green correction data of the green pixel is gout = 1 / max(G) × Gin. In this way, the brightness of each green pixel can be finely adjusted, effectively compensating for the green display deviation caused by backlighting factors and improving the display quality of the green parts in the entire image.

[0202] In some embodiments, determining the red pixel compensation coefficient based on the red backlight value includes the following steps:

[0203] The red pixel compensation coefficient is determined based on the reciprocal of the red backlight value.

[0204] The control circuit can use the reciprocal of the red backlight value as the red compensation coefficient, or multiply the reciprocal of the red backlight value by a specific coefficient, and use the result as the red compensation coefficient. As an example, the first algorithm is a maximum value extraction algorithm, where the red backlight value of the backlight partition is the maximum value Max(R) of the red input grayscale value (Rin) of each red pixel in the corresponding image partition. The red pixel compensation coefficient is the reciprocal of the red backlight value, i.e., 1 / max(R).

[0205] Furthermore, for each red pixel, the product of its input grayscale value and the red pixel compensation coefficient of its corresponding zone is used as its red correction data, i.e., the red correction data of the red pixel is rout = 1 / max(R) × Rin. In this way, the brightness of each red pixel can be finely adjusted, effectively compensating for red display deviations caused by backlighting factors and improving the display quality of the red parts in the entire image.

[0206] In some embodiments, in the case of the first result, the step of determining the blue pixel compensation coefficient based on the red backlight value includes: determining the blue pixel compensation coefficient based on the reciprocal of the red backlight value.

[0207] The control circuit can use the reciprocal of the red backlight value as the blue compensation coefficient, or multiply the reciprocal of the red backlight value by a specific coefficient and use the result as the blue compensation coefficient.

[0208] In the case of the second result, the step of determining the blue pixel compensation coefficient based on the blue backlight value includes: determining the blue pixel compensation coefficient based on the reciprocal of the blue backlight value.

[0209] The control circuit can use the reciprocal of the blue backlight value as the blue compensation coefficient, or multiply the reciprocal of the blue backlight value by a specific coefficient and use the result as the blue compensation coefficient.

[0210] As an example, the first algorithm is a maximum value extraction algorithm. The brightness of the red light-emitting module under red backlight value without conversion to blue light is the same as the brightness of the converted red light. The blue backlight value of the backlight zone is taken as the maximum of the maximum red input grayscale value Max(R) and the maximum blue input grayscale value Max(B) in the corresponding image zone, i.e., max(R, B). The blue pixel compensation coefficient is the reciprocal of the maximum of the maximum red input grayscale value Max(R) and the maximum blue input grayscale value Max(B), i.e., 1 / max(R, B).

[0211] Furthermore, for each blue pixel, the product of its input grayscale value and the compensation coefficient of the blue pixel in its corresponding zone is used as its blue correction data, where bout = 1 / max(R, B) × Bin. In this way, the brightness of each blue pixel can be finely adjusted, effectively compensating for blue display deviations caused by backlighting and improving the display quality of the blue portion of the entire image.

[0212] In some embodiments, during the control process, a green light-emitting chip is driven based on the green backlight value, and a second blue light-emitting chip is driven based on the red backlight value. Based on the comparison algorithm or query result of the blue and red backlight values, the first blue light-emitting chip is either not illuminated or driven for blue light brightness compensation. This ensures that the final red, green, and blue light emission brightness meets the display brightness requirements. Simultaneously, compensation coefficients are generated based on the backlight values ​​of each color pixel, and correction coefficients are generated based on these compensation coefficients to control the liquid crystal transmittance of each pixel in the liquid crystal display panel. This further improves the blue light color cast problem and enhances the display effect of the display device.

[0213] In some embodiments, a driving method for the above-described display device is also provided, the method comprising the following steps:

[0214] Image frame data is acquired, and the input grayscale value of each color pixel in the image partition corresponding to the backlight partition is determined based on the image frame data. According to the first algorithm, red, green, and blue backlight values ​​for the corresponding backlight partition are generated based on the input grayscale values ​​of each color pixel in the image partition. The red and blue backlight values ​​of the backlight partition are compared using a comparison algorithm. If the comparison algorithm yields a first result, within the backlight period corresponding to the current frame, the red backlight value is used to drive the second blue LED chip of the backlight partition, the green backlight value is used to drive the green LED chip of the backlight partition, and the blue backlight value is not used to drive the first blue LED chip of the backlight partition. If the comparison algorithm produces a second result, then a compensation backlight value is obtained by performing a first processing based on the blue backlight value and red backlight value of the backlight partition. Within the backlight period corresponding to the current frame, the red backlight value is used to drive the second blue light-emitting chip of the backlight partition, the green backlight value is used to drive the green light-emitting chip of the backlight partition, and the compensation backlight value is used to drive the first blue light-emitting chip of the backlight partition to perform blue light brightness compensation. Furthermore, each pixel driving data is generated based on the input grayscale value of each color pixel and the compensation coefficient of each color pixel to drive the liquid crystal display panel. The compensation coefficient of each color pixel is generated based on at least one factor of the color backlight value of the backlight partition.

[0215] In some embodiments, a driving method for the above-described display device is also provided, the method comprising the following steps:

[0216] Acquire image frame data and determine the input grayscale value of each color pixel in the image partition corresponding to the backlight partition based on the image frame data;

[0217] Based on the input grayscale values ​​of each color pixel in the image partition, the red backlight value, green backlight value, and blue backlight value of the corresponding backlight partition are generated according to the first algorithm.

[0218] The corresponding results are queried based on the red and blue backlight values ​​of the backlight zones in a preset mapping relationship. The mapping relationship is the relationship between different combinations of each color backlight value and the driving mode of each color light-emitting chip.

[0219] If the query yields the first result, within the backlight period corresponding to the current frame, the second blue light-emitting chip of the backlight zone is driven according to the red backlight value, the green light-emitting chip of the backlight zone is driven according to the green backlight value, and the blue backlight value is not used to drive the first blue light-emitting chip of the backlight zone.

[0220] If the query yields a second result, the first processing is performed based on the blue backlight value and red backlight value of the backlight partition to obtain the compensation backlight value. Within the backlight period corresponding to the current frame, the red backlight value is used to drive the second blue light-emitting chip of the backlight partition, the green backlight value is used to drive the green light-emitting chip of the backlight partition, and the compensation backlight value is used to drive the first blue light-emitting chip of the backlight partition to perform blue light brightness compensation.

[0221] Furthermore, each pixel driving data is generated based on the input grayscale value of each color pixel and the compensation coefficient of each color pixel to drive the liquid crystal display panel, wherein each color pixel compensation coefficient is generated based on at least one factor of the backlight value of each color partitioned by the backlight.

[0222] In some embodiments, the first result indicates that, within the backlight period corresponding to the current frame, if the second blue light-emitting chip is driven to excite the red phosphor using the red backlight value, the brightness of the unconverted blue light can meet the blue backlight brightness requirement within the backlight period; the second result indicates that, within the backlight period corresponding to the current frame, if the second blue light-emitting chip is driven to excite the red phosphor using the red backlight value, the brightness of the unconverted blue light does not meet the blue backlight brightness requirement within the current backlight period.

[0223] In some embodiments, the step of generating pixel driving data to drive the liquid crystal display panel based on the input grayscale value of each color pixel and the compensation coefficient of each color pixel includes the following steps:

[0224] The green pixel compensation coefficient is determined based on the green backlight value; grayscale compensation is performed on the green pixels in the image partition according to the green pixel compensation coefficient to generate green correction data corresponding to each green pixel, and the green pixels of the liquid crystal display panel are driven according to the green correction data.

[0225] The red pixel compensation coefficient is determined based on the red backlight value; grayscale compensation is performed on the red pixels in the image partition according to the red pixel compensation coefficient to generate red correction data corresponding to each red pixel, and the red pixels of the liquid crystal display panel are driven according to the red correction data.

[0226] In the case of the first result, the blue pixel compensation coefficient is determined based on the red backlight value; in the case of the second result, the blue pixel compensation coefficient is determined based on the blue backlight value; and, grayscale compensation is performed on the blue pixels in the image partition based on the determined blue pixel compensation coefficient to generate blue correction data corresponding to each blue pixel, and the blue pixels of the liquid crystal display panel are driven based on the blue correction data.

[0227] In some embodiments, the step of performing grayscale compensation on the green pixels within the image partition according to the green pixel compensation coefficient to generate green correction data corresponding to each green pixel includes the following steps:

[0228] The green correction data corresponding to each green pixel in the image partition is generated by multiplying the green pixel compensation coefficient and the green input grayscale value of each green pixel in the image partition.

[0229] The steps involve performing grayscale compensation on the red pixels within the image partition based on the red pixel compensation coefficient to generate red correction data corresponding to each red pixel, including:

[0230] The red correction data corresponding to each red pixel in the image partition is generated by multiplying the red pixel compensation coefficient and the red input grayscale value of each red pixel in the image partition.

[0231] The steps involve performing grayscale compensation on the blue pixels within the image partition based on the determined blue pixel compensation coefficients to generate blue correction data corresponding to each blue pixel, including the following steps:

[0232] Based on the determined blue pixel compensation coefficient and the product of the blue input grayscale value of each blue pixel in the image partition, the blue correction data corresponding to each blue pixel in the image partition is generated.

[0233] In some embodiments, the step of determining the green pixel compensation coefficient based on the green backlight value includes: determining the green pixel compensation coefficient based on the reciprocal of the green backlight value.

[0234] The steps for determining the red pixel compensation coefficient based on the red backlight value include: determining the red pixel compensation coefficient based on the reciprocal of the red backlight value.

[0235] In the case of the first result, the step of determining the blue pixel compensation coefficient based on the red backlight value includes: determining the blue pixel compensation coefficient based on the reciprocal of the red backlight value. In the case of the second result, the step of determining the blue pixel compensation coefficient based on the blue backlight value includes: determining the blue pixel compensation coefficient based on the reciprocal of the blue backlight value.

[0236] In some embodiments, the driving method further includes the following steps:

[0237] When the red backlight value is 0, then within the backlight period corresponding to the current frame, the second blue light-emitting chip of the backlight partition is driven according to the red backlight value, the green light-emitting chip of the backlight partition is driven according to the green backlight value, and the first blue light-emitting chip of the backlight partition is driven according to the blue backlight value.

[0238] Alternatively, if the red backlight value is less than the first threshold, then within the backlight period corresponding to the current frame, the second blue light-emitting chip of the backlight partition is driven according to the red backlight value, the green light-emitting chip of the backlight partition is driven according to the green backlight value, and the first blue light-emitting chip of the backlight partition is driven according to the blue backlight value.

[0239] In some embodiments, the driving method further includes the following step: if the result of the comparison algorithm is a second result, the difference between the product of the blue backlight value of the backlight partition and the red backlight value and the preset ratio is determined as the compensation backlight value.

[0240] The ratio between the brightness of the red light-emitting module under red backlight value without converting to blue light and the brightness of the converted red light is defined as a preset ratio, so that the brightness of the red light-emitting module under red backlight value without converting to blue light is equivalent to the brightness of the blue light obtained by driving the first blue light-emitting chip with the backlight value obtained by multiplying the red backlight value and the preset ratio.

[0241] In some embodiments, the driving method further includes the following steps:

[0242] If the product of the red backlight value and the preset ratio is greater than or equal to the blue backlight value, it is determined as the first result; and if the product of the red backlight value and the preset ratio is less than the blue backlight value, it is determined as the second result.

[0243] In some embodiments, the driving method further includes the following steps: determining a first result when the ratio between the product of the red backlight value and the preset ratio and the blue backlight value exceeds a second threshold, and determining a second result when the ratio does not exceed the second threshold.

[0244] In some embodiments, the first process includes performing interpolation algorithm processing; or, the first process includes performing query processing based on a preset backlight mapping relationship.

[0245] It should be understood that although the steps in the flowcharts of the embodiments described above are shown sequentially according to the arrows, these steps are not necessarily executed in the order indicated by the arrows. Unless explicitly stated herein, there is no strict order restriction on the execution of these steps, and they can be executed in other orders. Moreover, at least some steps in the flowcharts of the embodiments described above may include multiple steps or multiple stages. These steps or stages are not necessarily completed at the same time, but can be executed at different times. The execution order of these steps or stages is not necessarily sequential, but can be performed alternately or in turn with other steps or at least some of the steps or stages of other steps.

[0246] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this application.

[0247] The embodiments described above are merely illustrative of several implementation methods of this application, and while the descriptions are specific and detailed, they should not be construed as limiting the scope of this patent application. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the protection scope of this application. Therefore, the protection scope of this application should be determined by the appended claims.

Claims

1. A display device, characterized in that, include: LCD display panel, used to display images; A backlight module is used to provide a light source for the liquid crystal display panel; The backlight module includes multiple backlight zones, each backlight zone includes at least one light-emitting unit, each light-emitting unit includes a first blue light-emitting chip, a green light-emitting chip, and a red light-emitting module, the red light-emitting module includes a second blue light-emitting chip and a red phosphor located above the second blue light-emitting chip; A control circuit, connected to the liquid crystal display panel and the backlight module, is configured to: Acquire image frame data, and determine the input grayscale value of each color pixel in the image partition corresponding to the backlight partition based on the image frame data; Based on the input grayscale values ​​of each color pixel in the image partition, the red backlight value, green backlight value, and blue backlight value of the corresponding backlight partition are generated according to the first algorithm. The first result or the second result is obtained by comparing the red and blue backlight values ​​of the backlight partitions using an algorithm or by querying a preset mapping relationship. The first result indicates that if the red backlight value is used to drive the second blue light-emitting chip to excite the red phosphor within the backlight period corresponding to the current frame, the brightness of the unconverted blue light can meet the blue backlight brightness requirement within the backlight period. The second result indicates that if the red backlight value is used to drive the second blue light-emitting chip to excite the red phosphor within the backlight period corresponding to the current frame, the brightness of the unconverted blue light does not meet the blue backlight brightness requirement within the current backlight period. The mapping relationship is the relationship between different combinations of color backlight values ​​and the driving mode of each color light-emitting chip. When the result is the first result, within the backlight period corresponding to the current frame, the red backlight value is used to drive the second blue light-emitting chip of the backlight partition, the green backlight value of the backlight partition is used to drive the green light-emitting chip of the backlight partition, and the blue backlight value is not used to drive the first blue light-emitting chip of the backlight partition. If the result is the second result, then a first processing is performed based on the blue backlight value and red backlight value of the backlight partition to obtain a compensated backlight value. In the backlight period corresponding to the current frame, the red backlight value is used to drive the second blue light-emitting chip of the backlight partition, the green backlight value is used to drive the green light-emitting chip of the backlight partition, and the compensated backlight value is used to drive the first blue light-emitting chip of the backlight partition to perform blue light brightness compensation. Furthermore, pixel driving data is generated based on the input grayscale value of each color pixel and the compensation coefficient of each color pixel to drive the liquid crystal display panel, wherein each of the color pixel compensation coefficients is generated based on at least one factor based on the color backlight value of each backlight zone.

2. The display device as claimed in claim 1, characterized in that, The step of generating pixel driving data based on the input grayscale value of each color pixel and the compensation coefficient of each color pixel to drive the liquid crystal display panel includes: The green pixel compensation coefficient is determined based on the green backlight value; grayscale compensation is performed on the green pixels in the image partition based on the green pixel compensation coefficient to generate green correction data corresponding to each green pixel; and the green pixels of the liquid crystal display panel are driven based on the green correction data. The red pixel compensation coefficient is determined based on the red backlight value; grayscale compensation is performed on the red pixels in the image partition based on the red pixel compensation coefficient to generate red correction data corresponding to each red pixel, and the red pixels of the liquid crystal display panel are driven based on the red correction data; In the case of the first result, a blue pixel compensation coefficient is determined based on the red backlight value; in the case of the second result, a blue pixel compensation coefficient is determined based on the blue backlight value; and, based on the determined blue pixel compensation coefficient, grayscale compensation is performed on the blue pixels in the image partition to generate blue correction data corresponding to each blue pixel, and the blue pixels of the liquid crystal display panel are driven based on the blue correction data.

3. The display device as described in claim 2, characterized in that, The step of performing grayscale compensation on the green pixels within the image partition according to the green pixel compensation coefficient to generate green correction data corresponding to each green pixel includes: Based on the product of the green pixel compensation coefficient and the green input grayscale value of each green pixel in the image partition, green correction data corresponding to each green pixel in the image partition is generated. The step of performing grayscale compensation on the red pixels within the image partition according to the red pixel compensation coefficient to generate red correction data corresponding to each red pixel includes: Based on the product of the red pixel compensation coefficient and the red input grayscale value of each red pixel in the image partition, the red correction data corresponding to each red pixel in the image partition is generated. The step of performing grayscale compensation on the blue pixels within the image partition according to the determined blue pixel compensation coefficient to generate blue correction data corresponding to each blue pixel includes: Based on the product of the determined blue pixel compensation coefficient and the blue input grayscale value of each blue pixel in the image partition, blue correction data corresponding to each blue pixel in the image partition is generated.

4. The display device as described in claim 3, characterized in that, The step of determining the green pixel compensation coefficient based on the green backlight value includes: determining the green pixel compensation coefficient based on the reciprocal of the green backlight value; Determining the red pixel compensation coefficient based on the red backlight value includes: determining the red pixel compensation coefficient based on the reciprocal of the red backlight value; In the case of the first result, determining the blue pixel compensation coefficient based on the red backlight value includes: determining the blue pixel compensation coefficient based on the reciprocal of the red backlight value; In the case of the second result, determining the blue pixel compensation coefficient based on the blue backlight value includes: determining the blue pixel compensation coefficient based on the reciprocal of the blue backlight value.

5. The display device as claimed in claim 1, characterized in that, The control circuit is also configured to: When the red backlight value is 0, then within the backlight period corresponding to the current frame, the second blue light-emitting chip of the backlight partition is driven according to the red backlight value, the green light-emitting chip of the backlight partition is driven according to the green backlight value, and the first blue light-emitting chip of the backlight partition is driven according to the blue backlight value. Alternatively, if the red backlight value is less than the first threshold, then within the backlight period corresponding to the current frame, the second blue light-emitting chip of the backlight zone is driven according to the red backlight value, the green light-emitting chip of the backlight zone is driven according to the green backlight value, and the first blue light-emitting chip of the backlight zone is driven according to the blue backlight value.

6. The display device according to claim 1, characterized in that, The control circuit is configured as follows: In the case of the second result, the difference between the product of the blue backlight value of the backlight zone and the red backlight value and the preset ratio is determined as the compensation backlight value. The ratio between the brightness of the red light-emitting module under the red backlight value without converting to blue light and the brightness of the converted red light is defined as the preset ratio, so that the brightness of the red light-emitting module under the red backlight value without converting to blue light is equivalent to the brightness of the blue light obtained by driving the first blue light-emitting chip with the backlight value obtained by multiplying the red backlight value and the preset ratio.

7. The display device according to claim 1, characterized in that, The control circuit is configured as follows: If the product of the red backlight value and the preset ratio is greater than or equal to the blue backlight value, it is determined as a first result; and if the product of the red backlight value and the preset ratio is less than the blue backlight value, it is determined as a second result. The ratio between the brightness of the red light-emitting module under the red backlight value without converting to blue light and the brightness of the converted red light is defined as the preset ratio, so that the brightness of the red light-emitting module under the red backlight value without converting to blue light is equivalent to the brightness of the blue light obtained by driving the first blue light-emitting chip with the backlight value obtained by multiplying the red backlight value and the preset ratio.

8. The display device according to claim 1, characterized in that, The control circuit is configured as follows: The product of the red backlight value and the preset ratio, and the ratio between the product and the blue backlight value, are determined to be the first result if the ratio exceeds a second threshold, and the second result if the ratio does not exceed the second threshold. The ratio between the brightness of the red light-emitting module under the red backlight value without converting to blue light and the brightness of the converted red light is defined as the preset ratio, so that the brightness of the red light-emitting module under the red backlight value without converting to blue light is equivalent to the brightness of the blue light obtained by driving the first blue light-emitting chip with the backlight value obtained by multiplying the red backlight value and the preset ratio.

9. The display device according to claim 1, characterized in that, The first process includes performing a difference algorithm; or, The first process includes querying based on a preset backlight mapping relationship.

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