Liquid crystal display device based on field order and color image display method

Abstract

The invention relates to the technical field of liquid crystal display, and provides liquid crystal display equipment based on a field sequence and a color image display method. White backlight is inserted in a liquid crystal response stage to reduce a color separation phenomenon, and the white backlight is inserted in the liquid crystal response stage, so that white light can be emitted at the time when the original backlight is turned off; according to the backlight module, the original backlight opening time in the color backlight stage is not occupied, so that the backlight source of the backlight module is always in the lightened state, the backlight light efficiency is improved, meanwhile, the backlight source of the backlight module can be prevented from being converted between the two light and dark states of closing and lightening, the image flickering problem is solved, and the image watching quality is improved.

Description

Technical Field

[0001] This application relates to the field of liquid crystal display technology, and provides a field-sequence-based liquid crystal display device and a color image display method. Background Technology

[0002] As liquid crystal displays (LCDs) evolve towards larger sizes and ultra-high definition, the demands on power consumption are increasing. To further reduce the power consumption of LCD devices, the industry has conducted research in various aspects, such as improving the transmittance of LCD panels and using local dynamic dimming technology. Among these, field-sequential color display technology has attracted significant industry attention.

[0003] Field-sequential color display is a novel color display mode. The backlight module uses RGB backlighting, sequentially refreshing the backlights of the three primary colors (R (red), G (green), and B (blue) within a single field (i.e., the display cycle of one frame). The transmittance of each backlight is adjusted by the liquid crystal driving layer, and different color sub-images are displayed sequentially on the liquid crystal panel. This utilizes the hysteresis effect of the human eye to achieve temporal fusion of the three color sub-images. Thus, the three sub-images are ultimately synthesized into a color image in the human eye. Figure 1 As shown. Due to the use of RGB backlighting, sequential color display can design the color gamut and brightness as needed, resulting in higher color saturation of the image. At the same time, since sequential color display does not have the filtering effect of CF color film, the transmittance of the backlight module can be increased to about 3 times the original (for example, from 5% to 15%), effectively and significantly reducing the power consumption of LCD display devices, and has broad application prospects.

[0004] However, during field-sequential color display, due to eye movement, the RGB components of the same pixel will fall on different positions on the retina during time-sequential display. As a result, viewers usually perceive color separation at the edges of the displayed target, a phenomenon known as color breakup, which can easily cause visual fatigue.

[0005] Therefore, reducing color separation in images has become an urgent problem to be solved in field-sequence color display technology. Summary of the Invention

[0006] This application provides a field-sequence-based liquid crystal display device and a color image display method to reduce color separation and flickering in images.

[0007] In a first aspect, embodiments of this application provide a field-sequence-based liquid crystal display device, comprising: LCD panel; A backlight module, wherein the backlight module includes a red backlight, a green backlight and a blue backlight; The processor is configured as follows: Acquire an initial RGB image and load a pixel color compensation table of the initial RGB image under a preset white light brightness; the pixel color compensation table includes: the compensated color values ​​of the R, G, and B components of each pixel in the RGB image when the backlight module emits white light according to the preset white light brightness; The target RGB image is obtained by compensating the color values ​​of the R, G, and B components of each pixel. The target RGB image is divided into three subframes, each subframe corresponding to a color field; For each subframe, the backlight module is controlled to emit white light according to the preset white light brightness within the liquid crystal response time of the subframe, and to continue emitting backlight adapted to the color field color of the subframe according to the grayscale value of the pixel in the subframe within the color backlight time; the liquid crystal response time is the time required for the transmittance of the liquid crystal panel to reach a steady state when switching between different grayscale values, and the color backlight time is the time for the transmittance of the liquid crystal panel to remain in a steady state.

[0008] The beneficial effects of the above technical solution are as follows: In field-sequential color display technology, a solution is provided to reduce color separation by inserting white backlight during the liquid crystal response stage. To ensure that the proportion of white backlight inserted at each pixel is consistent, the color value of each pixel in the initial RGB image after inserting white backlight is corrected in advance by using a pixel color compensation table of the initial RGB image under a preset white brightness. This reduces color separation and color shift. Thus, when performing field-sequential color display based on the corrected target RGB image, the backlight module can emit white light according to the preset white light brightness within the liquid crystal response time, and continue to emit backlight that matches the corresponding color field color according to the corresponding grayscale value within the color backlight time of each subframe. Since the backlight module emits light during both the liquid crystal response time and the color backlight time, the image flickering problem caused by the drastic brightness change of the backlight alternation is avoided, while the backlight efficiency is improved.

[0009] Optionally, the processor controls the backlight module to emit white light according to the preset white light brightness within the liquid crystal response time, specifically configured as follows: When the backlight module includes a white backlight source, during the liquid crystal response time, the backlight module is controlled to illuminate the white backlight source according to the preset white light brightness to emit white light; When the backlight module does not include a white backlight source, during the liquid crystal response time, the backlight module is controlled to simultaneously illuminate the red backlight source, the green backlight source, and the blue backlight source to emit white light according to the preset white light brightness.

[0010] The beneficial effects of the above technical solution are as follows: the backlight module has two situations: with a white backlight and without a white backlight. For the case with a white backlight, white light is emitted by the white backlight to improve the compensation efficiency of white light. For the case without a white backlight, white light is emitted by red, green and blue backlights to save hardware resources.

[0011] Optionally, the processor controls the backlight module to continue emitting backlight that matches the color field color of the sub-frame according to the grayscale value of the sub-frame during the color backlight time. Specifically, the configuration is as follows: When the color field corresponding to the subframe is a monochrome field, during the color backlight time of the subframe, the backlight module is controlled to continue to illuminate the red backlight, the green backlight, or the blue backlight corresponding to the monochrome field of the subframe according to the grayscale value of the pixel in the subframe to emit monochrome light. When the color field corresponding to the subframe is a mixed color field, during the color backlight time of the subframe, the backlight module is controlled to continue to illuminate at least two of the red backlight, green backlight and blue backlight corresponding to the mixed color field of the subframe according to the grayscale value of the pixel in the subframe to emit mixed color light.

[0012] The beneficial effects of the above technical solution are as follows: the solution of inserting white backlight in the liquid crystal response stage can be used to improve various algorithms for solving color separation phenomena, thereby improving backlight efficiency and reducing image flicker.

[0013] Optionally, the processor generates a pixel color compensation table through the following operations: Fit the liquid crystal response curve of each pixel in the initial RGB image, and calculate the color difference of each pixel's R, G, and B components under a preset white light brightness. Based on the color differences of the R, G, and B components of each pixel, the color values ​​of the R, G, and B components of the corresponding pixel are compensated so that the hue of the R, G, and B components after compensation is consistent with the hue of the R, G, and B components before compensation. A pixel color compensation table is generated based on the correspondence between the color values ​​of the R, G, and B components before and after compensation for each pixel.

[0014] The beneficial effects of the above technical solution are as follows: by using the liquid crystal response curve of G2G, the color value of each pixel after the white backlight is inserted is compensated in advance. Since the color field of the color value before and after compensation is consistent, the color deviation after the white backlight is inserted is reduced.

[0015] Optionally, the processor generates a pixel color compensation table through the following operations: For each pixel in the initial RGB image, adjustments are made under a preset white backlight brightness to obtain a new color value that matches the hue of the R, G, and B components of the pixel. A pixel color compensation table is generated based on the correspondence between the color values ​​of the R, G, and B components of each pixel and the new color value.

[0016] The beneficial effect of the above technical solution is that by ensuring the color field of each pixel before and after compensation is consistent, the color shift after inserting white backlight is reduced.

[0017] Secondly, embodiments of this application provide a field-sequence-based liquid crystal display device, comprising: LCD panel; A backlight module, wherein the backlight module includes a red backlight, a green backlight and a blue backlight; The processor is configured as follows: The liquid crystal response curves of each pixel in the RGB image are obtained in three subframes. The liquid crystal response curves are the curves of the transmittance of the pixel on the liquid crystal panel over time during the liquid crystal response time of each subframe. Each subframe corresponds to a color field, and the liquid crystal response time is the same between different subframes. For each subframe, based on the transmittance of multiple pixels contained in each backlight partition on the liquid crystal response curve of the subframe, and according to the set brightness compensation conditions, the white light brightness of the subframe in each backlight partition is determined; the set brightness compensation conditions are: the cumulative brightness of the white light transmitted during the liquid crystal response time reaches the preset color gamut compression ratio of the color field corresponding to the subframe, and the preset color gamut compression ratio of the color field corresponding to different subframes is the same. The backlight module is controlled to emit white light according to the white light brightness of each backlight zone during the liquid crystal response time, and to continue emitting backlight that matches the color field color of the sub-frame according to the grayscale value of the multiple pixels contained in each backlight zone in the sub-frame during the color backlight time.

[0018] The beneficial effects of the above technical solution are as follows: When white backlight is inserted during the liquid crystal response stage to reduce color separation, for each backlight partition containing multiple pixels, the white light brightness of the backlight partition in the corresponding color field of the three sub-frames is dynamically adjusted according to the liquid crystal response curve of the pixel in each sub-frame. This achieves proportional compression of the color gamut of the corresponding color field of each sub-frame, reducing color shift problems. Furthermore, since the backlight module emits light during both the liquid crystal response time and the color backlight time, it can avoid image flicker caused by drastic brightness changes during the alternation of backlight light and dark, while improving backlight efficiency.

[0019] Optionally, the processor controls the backlight module to emit white light according to the white light brightness of each backlight zone during the liquid crystal response time, specifically configured as follows: When the backlight module includes a white backlight source, during the liquid crystal response time, the backlight module is controlled to illuminate the white backlight source according to the white light brightness of each backlight zone to emit white light. When the backlight module does not include a white backlight source, during the liquid crystal response time, the backlight module is controlled to simultaneously illuminate the red backlight source, the green backlight source, and the blue backlight source to emit white light according to the white light brightness of each backlight zone.

[0020] The beneficial effects of the above technical solution are as follows: the backlight module has two situations: with a white backlight and without a white backlight. For the case with a white backlight, white light is emitted by the white backlight to improve the compensation efficiency of white light. For the case without a white backlight, white light is emitted by red, green and blue backlights to save hardware resources.

[0021] Optionally, the processor controls the backlight module to continue emitting backlight that matches the color field color of the sub-frame according to the grayscale values ​​of multiple pixels contained in each backlight partition within the sub-frame's color backlight time. Specifically, the configuration is as follows: When the color field corresponding to the subframe is a monochrome field, during the color backlight time of the subframe, the backlight module is controlled to continue to illuminate the red backlight, the green backlight, or the blue backlight corresponding to the monochrome field of the subframe according to the grayscale value of the multiple pixels contained in each backlight partition in the subframe to emit monochrome light. When the color field corresponding to the subframe is a mixed color field, during the color backlight time of the subframe, the backlight module is controlled to continue to illuminate at least two of the red backlight, green backlight and blue backlight corresponding to the mixed color field of the subframe according to the grayscale value of the multiple pixels contained in each backlight partition in the subframe to emit mixed color light.

[0022] The beneficial effects of the above technical solution are as follows: the solution of inserting white backlight in the liquid crystal response stage can be used to improve various algorithms for solving color separation phenomena, thereby improving backlight efficiency and reducing image flicker.

[0023] Thirdly, embodiments of this application provide a color image display method, including: Acquire an initial RGB image and load a pixel color compensation table of the initial RGB image under a preset white light brightness; the pixel color compensation table includes: the compensated color values ​​of the R, G, and B components of each pixel in the RGB image when the backlight module emits white light according to the preset white light brightness; The target RGB image is obtained by compensating the color values ​​of the R, G, and B components of each pixel. The target RGB image is divided into three subframes, each subframe corresponding to a color field; For each subframe, the backlight module is controlled to emit white light according to the preset white light brightness within the liquid crystal response time of the subframe, and to continue emitting backlight adapted to the color field color of the subframe according to the grayscale value of the pixel in the subframe within the color backlight time; the liquid crystal response time is the time required for the transmittance of the liquid crystal panel to reach a steady state when switching between different grayscale values, and the color backlight time is the time for the transmittance of the liquid crystal panel to remain in a steady state.

[0024] Optionally, controlling the backlight module to emit white light according to the preset white light brightness within the liquid crystal response time includes: When the backlight module includes a white backlight source, during the liquid crystal response time, the backlight module is controlled to illuminate the white backlight source according to the preset white light brightness to emit white light; When the backlight module does not include a white backlight source, during the liquid crystal response time, the backlight module is controlled to simultaneously illuminate the red backlight source, the green backlight source, and the blue backlight source to emit white light according to the preset white light brightness.

[0025] Optionally, controlling the backlight module to continue emitting backlight adapted to the color field color of the sub-frame according to the grayscale value of the sub-frame during the color backlight time includes: When the color field corresponding to the subframe is a monochrome field, during the color backlight time of the subframe, the backlight module is controlled to continue to illuminate the red backlight, the green backlight, or the blue backlight corresponding to the monochrome field of the subframe according to the grayscale value of the pixel in the subframe to emit monochrome light. When the color field corresponding to the subframe is a mixed color field, during the color backlight time of the subframe, the backlight module is controlled to continue to illuminate at least two of the red backlight, green backlight and blue backlight corresponding to the mixed color field of the subframe according to the grayscale value of the pixel in the subframe to emit mixed color light.

[0026] Optionally, the pixel color compensation table is generated in the following manner: Fit the liquid crystal response curve of each pixel in the initial RGB image, and calculate the color difference of each pixel's R, G, and B components under a preset white light brightness. Based on the color differences of the R, G, and B components of each pixel, the color values ​​of the R, G, and B components of the corresponding pixel are compensated so that the hue of the R, G, and B components after compensation is consistent with the hue of the R, G, and B components before compensation. A pixel color compensation table is generated based on the correspondence between the color values ​​of the R, G, and B components before and after compensation for each pixel.

[0027] Optionally, the pixel color compensation table is generated in the following manner: For each pixel in the initial RGB image, adjustments are made under a preset white backlight brightness to obtain a new color value that matches the hue of the R, G, and B components of the pixel. A pixel color compensation table is generated based on the correspondence between the color values ​​of the R, G, and B components of each pixel and the new color value.

[0028] Fourthly, embodiments of this application provide a color image display method, including: The liquid crystal response curves of each pixel in the RGB image are obtained in three subframes. The liquid crystal response curves are the curves of the transmittance of the pixel on the liquid crystal panel over time during the liquid crystal response time of each subframe. Each subframe corresponds to a color field, and the liquid crystal response time is the same between different subframes. For each subframe, based on the transmittance of multiple pixels contained in each backlight partition on the liquid crystal response curve of the subframe, and according to the set brightness compensation conditions, the white light brightness of the subframe in each backlight partition is determined; the set brightness compensation conditions are: the cumulative brightness of the white light transmitted during the liquid crystal response time reaches the preset color gamut compression ratio of the color field corresponding to the subframe, and the preset color gamut compression ratio of the color field corresponding to different subframes is the same. The backlight module is controlled to emit white light according to the white light brightness of each backlight zone during the liquid crystal response time, and to continue emitting backlight that matches the color field color of the sub-frame according to the grayscale value of the multiple pixels contained in each backlight zone in the sub-frame during the color backlight time.

[0029] Optionally, controlling the backlight module to emit white light according to the white light brightness of each backlight zone during the liquid crystal response time includes: When the backlight module includes a white backlight source, during the liquid crystal response time, the backlight module is controlled to illuminate the white backlight source according to the white light brightness of each backlight zone to emit white light. When the backlight module does not include a white backlight source, during the liquid crystal response time, the backlight module is controlled to simultaneously illuminate the red backlight source, the green backlight source, and the blue backlight source to emit white light according to the white light brightness of each backlight zone.

[0030] Optionally, controlling the backlight module to continue emitting backlight that matches the color field color of the sub-frame according to the grayscale values ​​of multiple pixels contained in each backlight partition within the sub-frame's color backlight time includes: When the color field corresponding to the subframe is a monochrome field, during the color backlight time of the subframe, the backlight module is controlled to continue to illuminate the red backlight, the green backlight, or the blue backlight corresponding to the monochrome field of the subframe according to the grayscale value of the multiple pixels contained in each backlight partition in the subframe to emit monochrome light. When the color field corresponding to the subframe is a mixed color field, during the color backlight time of the subframe, the backlight module is controlled to continue to illuminate at least two of the red backlight, green backlight and blue backlight corresponding to the mixed color field of the subframe according to the grayscale value of the multiple pixels contained in each backlight partition in the subframe to emit mixed color light.

[0031] Fifthly, embodiments of this application provide a computer-readable storage medium storing computer-executable instructions that, when executed, can implement the steps of the above-described color image display method.

[0032] The technical effects of any of the implementation methods in the third to fifth aspects can be found in the technical effects of the corresponding implementation methods in the first and second aspects, and will not be repeated here. Attached Figure Description

[0033] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0034] Figure 1 This is a schematic diagram of RGB backlighting provided in an embodiment of this application; Figure 2 This is a schematic diagram of the process of field-sequence color display provided in an embodiment of this application; Figure 3 The method of inserting white backlight into related technologies; Figure 4The method of inserting white backlight provided in the embodiments of this application; Figure 5 This is the effect of inserting white backlight according to the embodiments of this application; Figure 6 A structural diagram of a liquid crystal display device provided in an embodiment of this application; Figure 7 This is a system architecture diagram for pixel color shift compensation based on the liquid crystal response curve; Figure 8 This is a method of inserting white backlight during the liquid crystal response stage; Figure 9 A flowchart of a color image display method provided in this application embodiment; Figure 10 A backlight timing diagram provided for an embodiment of this application; Figure 11 This is a system architecture diagram for pixel color shift compensation based on the liquid crystal response curve; Figure 12 A flowchart of a color image display method provided in this application embodiment; Figure 13 This is a backlight timing diagram provided for an embodiment of this application. Detailed Implementation

[0035] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of this application will be clearly and completely described below with reference to the accompanying drawings of the embodiments of this application. Obviously, the described embodiments are only some embodiments of the technical solutions of this application, and not all embodiments. Based on the embodiments recorded in this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the technical solutions of this application.

[0036] Based on the exemplary embodiments shown in this application, all other embodiments obtained by those skilled in the art without inventive effort are within the scope of protection of this application. Furthermore, although the disclosures in this application are presented by way of one or more exemplary examples, it should be understood that each aspect of these disclosures can constitute a complete technical solution on its own.

[0037] 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.

[0038] The terms "first," "second," etc., used in the specification, claims, and accompanying drawings of this application are used to distinguish similar or related products or entities and do not necessarily imply a specific order or sequence, unless otherwise indicated. It should be understood that such terms can be used interchangeably where appropriate, for example, in situations where implementation can proceed in a sequence other than those given in the embodiments illustrated or described in this application.

[0039] Furthermore, the terms “comprising” and “having”, and any variations thereof, are intended to cover but not exclusively include, for example, a product or device that includes a series of components is not necessarily limited to those that are explicitly listed, but may include other components that are not explicitly listed or that are inherent to such product or device.

[0040] Field-sequence color displays have broad application prospects due to their advantages such as high color gamut and high luminous efficacy. For example... Figure 2 The diagram illustrates the process of field-sequential color display. A color image frame is divided into sub-frames representing the three primary colors R, G, and B, which are displayed sequentially. These three sub-frames divide the display cycle of a single image frame into three time periods. The display process for each sub-frame is identical, mainly including three stages: data loading, liquid crystal response, and backlight illumination. To ensure accurate grayscale display, the backlight module is turned off during the liquid crystal response stage (i.e., liquid crystal response time) of the three sub-frames, meaning the backlight is inserted into black. During the backlight illumination stage (i.e., color backlight time) of the three sub-frames, the liquid crystal molecules reach a steady state, and the backlight module sequentially refreshes the backlight sources of the three primary colors R, G, and B. The liquid crystal panel displays the sub-images of the three color fields in a time-division manner based on the transmittance of each color field. By utilizing the hysteresis effect of the human eye, these three sub-images are ultimately synthesized into a color image in the human eye.

[0041] It should be noted that the data loading phase within each subframe's time period is short and can be ignored.

[0042] For example, if the refresh rate of the three subframes is 240Hz, then the time period occupied by each subframe is 4.16ms. Assuming that the liquid crystal response stage time is 2ms, then the backlight brightness stage time is 2.16ms.

[0043] However, in field-sequential color displays, due to eye movement, the R, G, and B components of the same pixel displayed in time-sequential mode will fall on different positions on the retina, resulting in color separation, such as... Figure 2 As shown.

[0044] To suppress color separation, related technologies, based on RGB backlighting, propose a scheme to insert a white backlight source during the bright spot phase of the backlight. Taking a subframe as an example, assuming the color field corresponding to this subframe is the red field, such as... Figure 3As shown, the dashed line represents the liquid crystal response curve, which shows the change in liquid crystal transmittance over time. A white backlight is added during the backlight illumination stage when the liquid crystal transmittance is stable. The proportion of white backlight added can be controlled by adjusting the duty cycle and voltage amplitude of the white backlight, a simple implementation method. However, because the white backlight occupies the original emission time of the colored backlight, its luminous efficiency is lower. Furthermore, since the backlight module is constantly undergoing drastic brightness changes (off / on) during the liquid crystal response and backlight illumination stages, it may cause image flicker, reducing image quality and easily causing visual fatigue for viewers.

[0045] In view of this, embodiments of this application provide a field-sequence-based liquid crystal display device and a color image display method. By inserting white backlight during the liquid crystal response stage, color separation is mitigated. Furthermore, by inserting white backlight during the liquid crystal response stage and emitting white light during the time when the original backlight is off, the backlight of the backlight module is always on, thereby improving backlight efficiency. At the same time, it avoids the backlight of the backlight module switching between off and on states, thus improving image flicker and enhancing image viewing quality.

[0046] like Figure 4 The diagram illustrates the backlight control process of the backlight module before and after the addition of white light, as provided in this embodiment of the application. In the liquid crystal response stage of each sub-frame, an equal amount of white light is added without discrimination, without affecting the backlight process of the color field corresponding to each sub-frame in the color backlight stage. This achieves proportional compression of the color coordinates of the three primary colors (R, G, B), thereby alleviating color separation problems and reducing color shift problems. like Figure 5 As shown, in the liquid crystal response stage of the three subframes, adding equal amounts of white light is equivalent to compressing the original color coordinates of the three primary colors R, G, and B to R', G', and B'. The color saturation of the image after color gamut compression is reduced proportionally, and the color gamut is reduced, thereby alleviating the color separation problem. However, since the hue does not change and the color does not shift, there will be no color shift problem.

[0047] The liquid crystal display device in this application embodiment can be a smart TV with a liquid crystal display screen, a laser projector, a monitor, an electronic whiteboard, an electronic desktop, and a shopping mall navigation machine, etc.

[0048] It should be noted that the liquid crystal display devices in the embodiments of this application include, but are not limited to, the devices described above, and these devices are not intended to limit the embodiments of this application. Furthermore, the device type, size, specifications, etc., of the liquid crystal display devices described in the embodiments of this application are not limited.

[0049] The embodiments of this application are described below with reference to the accompanying drawings.

[0050] See Figure 6 This is a schematic diagram of the hardware configuration of a liquid crystal display device provided in an embodiment of this application. It mainly includes a liquid crystal panel 601, a backlight module 602, a processor 603, a driver board 606, a power supply board 605, a high voltage board 606, a keying board 607, and an audio / video signal input interface 608.

[0051] The LCD panel 601 includes a display screen assembly for displaying color images and a driving assembly for driving the image display, as well as a component for receiving image signals, displaying video, images, and a menu control interface, and a user control UI interface.

[0052] The liquid crystal display device in this embodiment displays color based on field-sequential color display. Within the display cycle of one frame of image, the display effect of color image is achieved through the cooperation of RGB backlight and display screen components. Therefore, the liquid crystal panel 601 of the liquid crystal display device using field-sequential color display does not include a color filter. The reason why the traditional spatial color mixing method requires a color filter is that the spatial color mixing method requires a color filter to combine the three sub-pixels R\G\B into one pixel to display color, so a color filter is required.

[0053] The backlight module 602 includes a backlight source, a light guide plate, a substrate, and other components such as a light-transmitting film, and is used to provide backlight for the liquid crystal panel 601, thereby displaying clear color images.

[0054] The processor 603 may include at least one of a CPU, a video processor, an audio processor, a graphics processing unit (CPG), random access memory (RAM), read-only memory (ROM), a first to nth interface for input / output, a communication bus, etc. It can control the operation of the liquid crystal display device and respond to various user operations through various stored software programs.

[0055] The processor 603 may include one or more central processing units (CPU), GPUs, or digital processing units, etc.

[0056] The driver board 606 typically includes components such as driver chips and logic circuits, and is used to control the display of the LCD panel 601. It obtains audio and video signals from the audio and video signal input interface 608, processes the audio and video input signals, and sends them to the LCD panel 601 in a specific manner, so that the LCD panel 601 can display color images.

[0057] The power board 605 is used to provide power to the components in the liquid crystal display device so that the components can work properly.

[0058] The high-voltage board 606 is an important component of the liquid crystal display device. It is a board that carries high-voltage power. In the liquid crystal panel 601, the function of the high-voltage board 606 is to convert the low-voltage power supply into a high-voltage power supply to provide enough electrons to drive the display of the liquid crystal panel 601. That is, it is used to light up the backlight in the liquid crystal display device so that the liquid crystal panel 601 can display the completed image under the illumination of the light source.

[0059] The keypad 607 is used to receive the user's key signals and send them to the processor 603, etc. The keypad 607 usually includes components such as key switches and interface cables.

[0060] In the embodiments of this application, the various hardware components of the liquid crystal display device can be connected by a bus, which can be divided into address bus, data bus, control bus, etc.

[0061] For the aforementioned liquid crystal display devices, when reducing color separation by inserting white backlight during the liquid crystal response stage, color shift issues arise because the liquid crystal response curves between different gray levels (G2G) are not fixed. If the proportion of white backlight inserted into the color fields corresponding to the three subframes is different, it can lead to color shift problems. For example, after inserting white backlight, one pixel may appear reddish while another appears greenish. Therefore, pixel color shift compensation is necessary when inserting white backlight during the liquid crystal response stage.

[0062] Example 1

[0063] In some embodiments, one method of pixel color shift compensation is to dynamically adjust the white field brightness of the white backlight added to each color field according to the liquid crystal response curve.

[0064] like Figure 7 As shown, this is the system architecture for pixel color shift compensation based on the liquid crystal response curve. For the input RGB image, the RGB image is divided into three sub-frames, each sub-frame corresponding to a color field (monochrome field or mixed color field). During the liquid crystal response stage of each sub-frame, the backlight brightness of white light is calculated according to the liquid crystal response curve of the pixel in that sub-frame. After converting the backlight brightness of white light into voltage, the backlight module emits white light according to the converted voltage. When entering the color backlight stage, the backlight module emits backlight that matches the color of the corresponding color field according to the grayscale value of the pixel in that sub-frame. At the same time, during the process of the backlight module emitting light, the liquid crystal panel presents the RGB image according to the transmittance of the pixel in the three sub-frames.

[0065] like Figure 8As shown, this is a backlight scheme that inserts white light during the liquid crystal response stage. Taking a subframe as an example, assuming that the color field corresponding to the subframe is the red field, the backlight module emits white light during the liquid crystal response stage and red light during the color backlight stage.

[0066] See Figure 9 The present application provides a flowchart of a color image display method, which mainly includes the following steps: S901: Obtain the liquid crystal response curve of each pixel in the RGB image in three sub-frames.

[0067] For each pixel in an RGB image, the liquid crystal response curves of each G2G (e.g., 0-127, 127-255, 127-0, ...) of the LCD panel are measured in advance. The liquid crystal response curve is the curve of the transmittance of the pixel on the LCD panel as a function of time during the liquid crystal response time of each subframe. Each subframe corresponds to a color field, and the liquid crystal response time (i.e., the time of the liquid crystal response stage) is the same between different subframes.

[0068] S902: For each sub-frame, based on the transmittance of the multiple pixels contained in each backlight partition on the liquid crystal response curve of the sub-frame, and according to the set brightness compensation conditions, determine the white light brightness of the sub-frame in each backlight partition.

[0069] Typically, during local dimming, the backlight module is divided into multiple backlight zones, each corresponding to multiple pixels on the LCD panel. Therefore, during pixel color shift compensation, color compensation can be performed on a per-backlight-zone basis.

[0070] When white light is inserted during the liquid crystal response stage, the color coordinates of the R, G, and B primary colors of the pixel are compressed, reducing the color gamut range. Therefore, the color gamut compression ratio of the color field corresponding to each sub-frame can be preset according to actual display requirements, and the cumulative brightness of the white light inserted during the liquid crystal response time of each sub-frame can be determined. In this way, based on the cumulative brightness and the color gamut compression ratio, the brightness compensation condition can be set to the cumulative brightness of the white light transmitted during the liquid crystal response time, achieving the preset color gamut compression ratio of the color field corresponding to the sub-frame. At the same time, to avoid introducing color shift, the preset color gamut compression ratio of the color fields corresponding to different sub-frames should be the same.

[0071] In the pixel color shift compensation process, given the known liquid crystal response curves of multiple pixels within each subframe of the backlight partition, and combining this with the cumulative brightness of the white light inserted within the liquid crystal response time of each subframe, the backlight brightness (i.e., white light brightness) of the white light inserted within the liquid crystal response time of each subframe can be dynamically calculated. Thus, to reduce the color shift caused by the inserted white light, color compensation is achieved by dynamically adjusting the white light brightness within each backlight partition (i.e., dynamically adjusting the voltage amplitude of the white light). The formula for white light brightness is as follows: Formula 1 in, This represents the cumulative brightness of white light. T represents the brightness of white light, and T represents the response time of the liquid crystal. Transmittance during the liquid crystal response time It is related to the G2G liquid crystal response curve; different G2Gs have different liquid crystal response curves.

[0072] It should be noted that the smaller the backlight partition is, the smaller the difference in the proportion of white light inserted into different pixels within the backlight partition. When each pixel corresponds to a partition (i.e., pixel-level backlight), the backlight brightness of each pixel can be adjusted independently, thereby simultaneously satisfying the equality of I(w) of each pixel and the uniformity of backlight brightness of each partition.

[0073] S903: Controls the backlight module to emit white light according to the white light brightness of each backlight zone during the liquid crystal response time, and to continue emitting backlight that matches the color field color of the sub-frame according to the grayscale values ​​of the multiple pixels contained in each backlight zone in the sub-frame during the color backlight time of the sub-frame.

[0074] During local dimming, the backlight module emits white light according to the white light brightness of each backlight zone during the liquid crystal response time of each sub-frame, and during the color backlight time of each sub-frame, it determines the backlight brightness of the corresponding color field of the sub-frame according to the grayscale values ​​of the multiple pixels contained in each backlight zone in the sub-frame, and then emits color-adapted backlight according to the backlight brightness of the corresponding color field.

[0075] In some embodiments, when the color field corresponding to the subframe is a monochromatic field, the backlighting method in the color backlighting stage is as follows: during the color backlighting time of the subframe, the backlight module is controlled to continue to illuminate the red backlight, green backlight, or blue backlight corresponding to the monochromatic field of the subframe according to the grayscale value of the subframe to emit monochromatic light.

[0076] In some embodiments, when the color field corresponding to the subframe is a mixed color field, the backlighting method in the color backlighting stage is as follows: during the color backlighting time of the subframe, the backlight module is controlled to continue to illuminate at least two of the red backlight, green backlight and blue backlight corresponding to the mixed color field of the subframe according to the grayscale value of the subframe to emit mixed color light.

[0077] The scheme of inserting white backlight during the liquid crystal response stage can be used to improve various algorithms that solve color separation problems, thereby enhancing backlight efficiency and reducing image flicker.

[0078] It should be noted that the number and order of monochrome fields and mixed fields in the three subframes in this application embodiment are not subject to any limiting requirements. For example, the three subframes may correspond to three monochrome fields: R, G, and B, respectively. Or, the three subframes may correspond to three mixed fields: RGB-RGB-RGB, respectively. Or, the three subframes may correspond to one RGB mixed field and two monochrome fields: R and B, respectively.

[0079] Taking three subframes corresponding to the R, G, and B color fields respectively as an example, the backlight timing diagram provided in this application embodiment is as follows: Figure 10 As shown, the backlight module emits white light with different voltage amplitudes during the liquid crystal response time of the three color fields.

[0080] Typically, the backlight module, including the backlight source, is not fixed, and the way white light is emitted during the liquid crystal response time is also different.

[0081] In some embodiments, when the backlight module includes a white backlight in addition to a red backlight, a green backlight, and a blue backlight, the backlight module is controlled to illuminate the white backlight according to a preset white light brightness to emit white light within the liquid crystal response time.

[0082] In some embodiments, when the backlight module includes only a red backlight, a green backlight, and a blue backlight, but not a white backlight, the backlight module is controlled to simultaneously illuminate the red backlight, the green backlight, and the blue backlight to emit white light according to a preset white light brightness within the liquid crystal response time.

[0083] For backlight modules with or without a white backlight source, white light is emitted from a white backlight source to improve the compensation efficiency of white light, while white light is emitted from red, green, and blue backlight sources to save hardware resources.

[0084] When white backlight is inserted during the liquid crystal response stage to reduce color separation, for each backlight partition containing multiple pixels, the white light brightness of the backlight partition in the corresponding color field of the three sub-frames is dynamically adjusted according to the liquid crystal response curve of the pixel in each sub-frame. This achieves proportional compression of the color gamut of the corresponding color field of each sub-frame, reducing color shift problems. Furthermore, since the backlight module emits light during both the liquid crystal response time and the color backlight time, it can avoid image flicker caused by drastic brightness changes during the alternation of backlight light and dark, while also improving backlight efficiency.

[0085] Example 2

[0086] In some embodiments, another way to compensate for pixel color shift is to fix the white light brightness and perform a look-up table mapping on the color values ​​of each pixel in advance.

[0087] like Figure 11As shown, this is the system architecture for pixel color shift compensation based on the liquid crystal response curve. For the input RGB image, a new RGB image is obtained by looking up the pixel color compensation table under a preset white light brightness. The new RGB image is then divided into three sub-frames, each corresponding to a color field. During the liquid crystal response stage of each sub-frame, the backlight module emits white light according to the preset white light brightness. When entering the color backlight stage, the backlight module emits backlight that matches the color of the corresponding color field according to the grayscale value of the pixel in that sub-frame. At the same time, during the backlight module's illumination process, the liquid crystal panel presents a visual image equivalent to the input RGB image according to the transmittance of the pixel in the three sub-frames.

[0088] When performing color compensation on each pixel in an RGB image, a pixel color compensation table can be pre-established. For each pixel, the color shift after inserting a preset white light brightness can be calculated in advance for compensation.

[0089] For example, for a pixel with RGB values ​​of (255 180 64), if the pixel appears greenish after being exposed to white light of a preset brightness in three fields, then the RGB values ​​should be padded to (255 170 64) in advance.

[0090] In some embodiments, since the white light brightness and insertion time are fixed, the difference in the liquid crystal response curve during switching between different gray levels will cause inconsistencies in the white light brightness of the inserted color values ​​of the R, G, and B components of each pixel. This can be addressed by using a curve fitting method for LUT mapping and pre-establishing a pixel color compensation table. Specifically, the liquid crystal response curve of each pixel in the initial RGB image is fitted, and the color differences of the R, G, and B components of each pixel under a preset white light brightness are calculated. Based on these color differences, the color values ​​of the R, G, and B components of the corresponding pixels are compensated to ensure that the hue of the compensated R, G, and B component color values ​​matches that before compensation. A pixel color compensation table is generated based on the correspondence between the R, G, and B component color values ​​before and after compensation for each pixel. By using the G2G liquid crystal response curve to pre-compensate the color values ​​of each pixel after inserting white backlight, the color field of the color values ​​before and after compensation is consistent, thereby reducing color shift after inserting white backlight.

[0091] In some embodiments, a pixel color compensation table for the RGB image under a preset white light brightness can be pre-calibrated on the machine. Specifically, for each pixel in the initial RGB image, calibration is performed under a preset white backlight brightness to obtain a new color value consistent with the hue of the pixel's R, G, and B components. Based on the correspondence between the R, G, and B component color values ​​of each pixel and the new color value, a pixel color compensation table is generated. By ensuring the color field of each pixel's color value remains consistent before and after compensation, color shift after inserting white backlight is reduced.

[0092] See Figure 12 The present application provides a flowchart of a color image display method, which mainly includes the following steps: S1201: Obtain the initial RGB image and load the pixel color compensation table of the initial RGB image under the preset white light brightness.

[0093] The pixel color compensation table includes the color values ​​of the R, G, and B components of each pixel in the RGB image after compensation when the backlight module emits white light at a preset white light brightness.

[0094] S1202: Obtain the target RGB image based on the compensated color values ​​of the R, G, and B components of each pixel.

[0095] By looking up the pixel color compensation table, the color of the pixel after inserting a preset white backlight brightness into the color field corresponding to the three subframes is corrected, and the target RGB image is obtained.

[0096] In some embodiments, for pixels that do not have a corresponding color in the pixel color compensation table, color compensation can be performed by interpolation.

[0097] S1203: Divide the target RGB image into three subframes, each subframe corresponding to a color field.

[0098] S1204: For each subframe, control the backlight module to emit white light according to the preset white light brightness during the liquid crystal response time of the subframe, and continue to emit backlight that matches the color field color of the corresponding subframe according to the grayscale value of the pixel in the subframe during the color backlight time of the subframe.

[0099] Because the pixel color is pre-compensated according to the preset white light brightness, the backlight module converts the preset white light brightness into a fixed voltage within the liquid crystal response time of each sub-frame, and then emits white light according to the converted voltage. Furthermore, within the color backlight time of each sub-frame, the backlight brightness of the corresponding color field of the sub-frame is determined based on the grayscale value of the pixel in the sub-frame, and then color-adapted backlight is emitted according to the backlight brightness of the corresponding color field. Here, the liquid crystal response time is the time required for the transmittance of the liquid crystal panel to reach a steady state when switching between different grayscale values, and the color backlight time is the time required for the transmittance of the liquid crystal panel to maintain a steady state.

[0100] In some embodiments, when the color field corresponding to the subframe is a monochromatic field, the backlighting method in the color backlighting stage is as follows: during the color backlighting time of the subframe, the backlight module is controlled to continue to illuminate the red backlight, green backlight, or blue backlight corresponding to the monochromatic field of the subframe according to the grayscale value of the pixel in the subframe to emit monochromatic light.

[0101] In some embodiments, when the color field corresponding to the subframe is a mixed color field, the backlighting method in the color backlighting stage is as follows: during the color backlighting time of the subframe, the backlight module is controlled to continue to illuminate at least two of the red backlight, green backlight and blue backlight corresponding to the mixed color field of the subframe according to the grayscale value of the subframe to emit mixed color light.

[0102] The scheme of inserting white backlight during the liquid crystal response stage can be used to improve various algorithms that solve color separation problems, thereby enhancing backlight efficiency and reducing image flicker.

[0103] It should be noted that the number and order of monochrome fields and mixed fields in the three subframes in this application embodiment are not subject to any limiting requirements. For example, the three subframes may correspond to three monochrome fields: R, G, and B, respectively. Or, the three subframes may correspond to three mixed fields: RGB-RGB-RGB, respectively. Or, the three subframes may correspond to one RGB mixed field and two monochrome fields: R and B, respectively.

[0104] Taking three subframes corresponding to the R, G, and B color fields respectively as an example, the backlight timing diagram provided in this application embodiment is as follows: Figure 13 As shown, the backlight module emits white light with the same voltage amplitude during the liquid crystal response time of the three color fields.

[0105] Typically, the backlight module, including the backlight source, is not fixed, and the way white light is emitted during the liquid crystal response time is also different.

[0106] In some embodiments, when the backlight module includes a white backlight in addition to a red backlight, a green backlight, and a blue backlight, the backlight module is controlled to illuminate the white backlight according to a preset white light brightness to emit white light within the liquid crystal response time.

[0107] In some embodiments, when the backlight module includes only a red backlight, a green backlight, and a blue backlight, but not a white backlight, the backlight module is controlled to simultaneously illuminate the red backlight, the green backlight, and the blue backlight to emit white light according to a preset white light brightness within the liquid crystal response time.

[0108] For backlight modules with or without a white backlight source, white light is emitted from a white backlight source to improve the compensation efficiency of white light, while white light is emitted from red, green, and blue backlight sources to save hardware resources.

[0109] When white backlight is inserted during the liquid crystal response stage to reduce color separation, in order to ensure that the proportion of white backlight inserted at each pixel is consistent, the color value of each pixel in the initial RGB image after inserting white backlight is corrected in advance by using the pixel color compensation table of the initial RGB image at a preset white brightness. This reduces color separation and color shift. In this way, when performing field-sequence color display based on the corrected target RGB image, the backlight module can emit white light at a preset white brightness within the liquid crystal response time, and continue to emit backlight adapted to the corresponding color field color according to the corresponding grayscale value within the color backlight time of each subframe. Since the backlight module emits light during both the liquid crystal response time and the color backlight time, the image flickering problem caused by drastic brightness changes between light and dark backlighting is avoided, while improving backlight efficiency.

[0110] Of the two pixel color compensation methods mentioned above, Example 2 performs color correction on each pixel, therefore, the compensation accuracy of Example 2 is higher than that of Example 1.

[0111] Those skilled in the art will understand that various aspects of this application can be implemented as a system, method, or program product. Therefore, various aspects of this application can be specifically implemented in the following forms: a completely hardware implementation, a completely software implementation (including firmware, microcode, etc.), or a combination of hardware and software implementations, collectively referred to herein as a "circuit," "module," or "system."

[0112] This application also provides a computer-readable storage medium for storing instructions that, when executed, can perform the steps of any of the color image display methods described in the foregoing embodiments.

[0113] This application also provides a computer program product for storing a computer program that performs the steps of any of the color image display methods described in the foregoing embodiments.

[0114] Those skilled in the art will understand that embodiments of this application can be provided as methods, systems, or computer program products. Therefore, this application can take the form of a completely hardware embodiment, a completely software embodiment, or an embodiment combining software and hardware aspects. Furthermore, this application can take the form of a computer program product embodied on one or more computer-usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) containing computer-usable program code.

[0115] This application is described with reference to flowchart illustrations and / or block diagrams of methods, apparatus (systems), and computer program products according to this application. It should be understood that each block of the flowchart illustrations and / or block diagrams, and combinations of blocks in the flowchart illustrations and / or block diagrams, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, special-purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, generate instructions for implementing the flowchart illustrations and / or block diagrams. Figure 1 One or more processes and / or boxes Figure 1 A device that provides the functions specified in one or more boxes.

[0116] These computer program instructions may also be stored in a computer-readable storage medium that can direct a computer or other programmable data processing device to function in a particular manner, such that the instructions stored in the computer-readable storage medium produce an article of manufacture including instruction means, which are implemented in a process Figure 1 One or more processes and / or boxes Figure 1 The function specified in one or more boxes.

[0117] These computer program instructions may also be loaded onto a computer or other programmable data processing equipment to cause a series of operational steps to be performed on the computer or other programmable equipment to produce a computer-implemented process, thereby providing instructions that execute on the computer or other programmable equipment for implementing the process. Figure 1 One or more processes and / or boxes Figure 1 The steps of the function specified in one or more boxes.

[0118] Obviously, those skilled in the art can make various modifications and variations to this application without departing from the spirit and scope of this application. Therefore, if such modifications and variations fall within the scope of the claims of this application and their equivalents, this application also intends to include such modifications and variations.

Claims

1. A field-sequence based liquid crystal display device, characterized in that, include: LCD panel; A backlight module, wherein the backlight module includes a red backlight, a green backlight and a blue backlight; The processor is configured as follows: Obtain the initial RGB image and load the pixel color compensation table of the initial RGB image under a preset white light brightness; The pixel color compensation table includes: the color values ​​of the R, G, and B components of each pixel in the RGB image after compensation when the backlight module emits white light according to the preset white light brightness; The target RGB image is obtained by compensating the color values ​​of the R, G, and B components of each pixel. The target RGB image is divided into three subframes, each subframe corresponding to a color field; For each subframe, the backlight module is controlled to emit white light according to the preset white light brightness within the liquid crystal response time of the subframe, and to continue emitting backlight adapted to the color field color of the subframe according to the grayscale value of the pixel in the subframe within the color backlight time; the liquid crystal response time is the time required for the transmittance of the liquid crystal panel to reach a steady state when switching between different grayscale values, and the color backlight time is the time for the transmittance of the liquid crystal panel to remain in a steady state.

2. The liquid crystal display device as described in claim 1, characterized in that, The processor controls the backlight module to emit white light according to the preset white light brightness within the liquid crystal response time. The specific configuration is as follows: When the backlight module includes a white backlight source, during the liquid crystal response time, the backlight module is controlled to illuminate the white backlight source according to the preset white light brightness to emit white light; When the backlight module does not include a white backlight source, during the liquid crystal response time, the backlight module is controlled to simultaneously illuminate the red backlight source, the green backlight source, and the blue backlight source to emit white light according to the preset white light brightness.

3. The liquid crystal display device as described in claim 1, characterized in that, The processor controls the backlight module to continue emitting backlight that matches the color field color of the sub-frame according to the grayscale value of the sub-frame during the color backlight time. The specific configuration is as follows: When the color field corresponding to the subframe is a monochrome field, during the color backlight time of the subframe, the backlight module is controlled to continue to illuminate the red backlight, the green backlight, or the blue backlight corresponding to the monochrome field of the subframe according to the grayscale value of the pixel in the subframe to emit monochrome light. When the color field corresponding to the subframe is a mixed color field, during the color backlight time of the subframe, the backlight module is controlled to continue to illuminate at least two of the red backlight, green backlight and blue backlight corresponding to the mixed color field of the subframe according to the grayscale value of the pixel in the subframe to emit mixed color light.

4. The liquid crystal display device as described in any one of claims 1-3, characterized in that, The processor generates the pixel color compensation table through the following operations: Fit the liquid crystal response curve of each pixel in the initial RGB image, and calculate the color difference of each pixel's R, G, and B components under a preset white light brightness. Based on the color differences of the R, G, and B components of each pixel, the color values ​​of the R, G, and B components of the corresponding pixel are compensated so that the hue of the R, G, and B components after compensation is consistent with the hue of the R, G, and B components before compensation. A pixel color compensation table is generated based on the correspondence between the color values ​​of the R, G, and B components before and after compensation for each pixel.

5. The liquid crystal display device as described in any one of claims 1-3, characterized in that, The processor generates the pixel color compensation table through the following operations: For each pixel in the initial RGB image, adjustments are made under a preset white backlight brightness to obtain a new color value that matches the hue of the R, G, and B components of the pixel. A pixel color compensation table is generated based on the correspondence between the color values ​​of the R, G, and B components of each pixel and the new color value.

6. A field-sequence based liquid crystal display device, characterized in that, include: LCD panel; A backlight module, wherein the backlight module includes a red backlight, a green backlight and a blue backlight; The processor is configured as follows: The liquid crystal response curves of each pixel in the RGB image are obtained in three subframes. The liquid crystal response curves are the curves of the transmittance of the pixel on the liquid crystal panel over time during the liquid crystal response time of each subframe. Each subframe corresponds to a color field, and the liquid crystal response time is the same between different subframes. For each subframe, based on the transmittance of multiple pixels contained in each backlight partition on the liquid crystal response curve of the subframe, and according to the set brightness compensation conditions, the white light brightness of the subframe in each backlight partition is determined; the set brightness compensation conditions are: the cumulative brightness of the white light transmitted during the liquid crystal response time reaches the preset color gamut compression ratio of the color field corresponding to the subframe, and the preset color gamut compression ratio of the color field corresponding to different subframes is the same. The backlight module is controlled to emit white light according to the white light brightness of each backlight zone during the liquid crystal response time, and to continue emitting backlight that matches the color field color of the sub-frame according to the grayscale value of the multiple pixels contained in each backlight zone in the sub-frame during the color backlight time.

7. The liquid crystal display device as described in claim 6, characterized in that, The processor controls the backlight module to emit white light according to the white light brightness of each backlight zone within the liquid crystal response time, specifically configured as follows: When the backlight module includes a white backlight source, during the liquid crystal response time, the backlight module is controlled to illuminate the white backlight source according to the white light brightness of each backlight zone to emit white light. When the backlight module does not include a white backlight source, during the liquid crystal response time, the backlight module is controlled to simultaneously illuminate the red backlight source, the green backlight source, and the blue backlight source to emit white light according to the white light brightness of each backlight zone.

8. The liquid crystal display device as described in claim 6, characterized in that, The processor controls the backlight module to continue emitting backlight that matches the color field color of the sub-frame according to the grayscale values ​​of multiple pixels contained in each backlight partition during the color backlight time of the sub-frame. The specific configuration is as follows: When the color field corresponding to the subframe is a monochrome field, during the color backlight time of the subframe, the backlight module is controlled to continue to illuminate the red backlight, the green backlight, or the blue backlight corresponding to the monochrome field of the subframe according to the grayscale value of the multiple pixels contained in each backlight partition in the subframe to emit monochrome light. When the color field corresponding to the subframe is a mixed color field, during the color backlight time of the subframe, the backlight module is controlled to continue to illuminate at least two of the red backlight, green backlight and blue backlight corresponding to the mixed color field of the subframe according to the grayscale value of the multiple pixels contained in each backlight partition in the subframe to emit mixed color light.

9. A method for displaying a color image, characterized in that, The method includes: Acquire an initial RGB image and load a pixel color compensation table of the initial RGB image under a preset white light brightness; the pixel color compensation table includes: the compensated color values ​​of the R, G, and B components of each pixel in the RGB image when the backlight module emits white light according to the preset white light brightness; The target RGB image is obtained by compensating the color values ​​of the R, G, and B components of each pixel. The target RGB image is divided into three subframes, each subframe corresponding to a color field; For each subframe, the backlight module is controlled to emit white light according to the preset white light brightness within the liquid crystal response time of the subframe, and to continue emitting backlight adapted to the color field color of the subframe according to the grayscale value of the pixel in the subframe within the color backlight time; the liquid crystal response time is the time required for the transmittance of the liquid crystal panel to reach a steady state when switching between different grayscale values, and the color backlight time is the time for the transmittance of the liquid crystal panel to remain in a steady state.

10. A method for displaying a color image, characterized in that, The method includes: The liquid crystal response curves of each pixel in the RGB image are obtained in three subframes. The liquid crystal response curves are the curves of the transmittance of the pixel on the liquid crystal panel over time during the liquid crystal response time of each subframe. Each subframe corresponds to a color field, and the liquid crystal response time is the same between different subframes. For each subframe, based on the transmittance of multiple pixels contained in each backlight partition on the liquid crystal response curve of the subframe, and according to the set brightness compensation conditions, the white light brightness of the subframe in each backlight partition is determined; the set brightness compensation conditions are: the cumulative brightness of the white light transmitted during the liquid crystal response time reaches the preset color gamut compression ratio of the color field corresponding to the subframe, and the preset color gamut compression ratio of the color field corresponding to different subframes is the same. The backlight module is controlled to emit white light according to the white light brightness of each backlight zone during the liquid crystal response time, and to continue emitting backlight that matches the color field color of the sub-frame according to the grayscale value of the multiple pixels contained in each backlight zone in the sub-frame during the color backlight time.

Images