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WO2025020636A1 - Procédé et appareil de compensation de luminosité de pixel, support informatique et dispositif d'affichage - Google Patents

Procédé et appareil de compensation de luminosité de pixel, support informatique et dispositif d'affichage Download PDF

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Publication number
WO2025020636A1
WO2025020636A1 PCT/CN2024/092837 CN2024092837W WO2025020636A1 WO 2025020636 A1 WO2025020636 A1 WO 2025020636A1 CN 2024092837 W CN2024092837 W CN 2024092837W WO 2025020636 A1 WO2025020636 A1 WO 2025020636A1
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WO
WIPO (PCT)
Prior art keywords
brightness
pixel
enhancement coefficient
distortion
backlight partition
Prior art date
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Application number
PCT/CN2024/092837
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English (en)
Chinese (zh)
Inventor
何洋
谢俊烽
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
HKC Co Ltd
Chongqing HKC Optoelectronics Technology Co Ltd
Original Assignee
HKC Co Ltd
Chongqing HKC Optoelectronics Technology Co Ltd
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Filing date
Publication date
Application filed by HKC Co Ltd, Chongqing HKC Optoelectronics Technology Co Ltd filed Critical HKC Co Ltd
Publication of WO2025020636A1 publication Critical patent/WO2025020636A1/fr
Pending legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
    • G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
    • G09G3/34—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source
    • G09G3/3406—Control of illumination source
    • G09G3/342—Control of illumination source using several illumination sources separately controlled corresponding to different display panel areas, e.g. along one dimension such as lines
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2320/00—Control of display operating conditions
    • G09G2320/02—Improving the quality of display appearance
    • G09G2320/0233—Improving the luminance or brightness uniformity across the screen

Definitions

  • the present application belongs to the technical field of display screens, and in particular, relates to a pixel brightness compensation method, device, computer medium, and display device.
  • Local dimming control is a display backlight system technology. Local dimming reduces the overall backlight brightness. However, in order to reduce the image brightness loss and image detail loss caused by the brightness reduction, it is necessary to use a pixel compensation algorithm to compensate the brightness according to certain rules. This process can not only restore the image brightness, but also help increase the image contrast. However, the pixel compensation value is not infinite. Taking the 8-bit display system as an example, the maximum compensation grayscale is 255, which will eventually cause image display distortion (Clipping) due to insufficient compensation.
  • the present application provides a pixel brightness compensation method, device, computer medium and display device, which can solve the problem of image display distortion during pixel compensation in the related art to a certain extent.
  • a pixel brightness compensation method comprising:
  • the brightness enhancement coefficient is adjusted according to a preset rule, and the process returns to determine the target brightness of each pixel in the backlight partition based on the total number N all , the initial brightness of each pixel and the brightness enhancement coefficient;
  • the brightness enhancement coefficient is determined as a target brightness enhancement coefficient.
  • determining the brightness enhancement coefficient corresponding to the backlight partition includes: obtaining the correction coefficient corresponding to the backlight partition; determining the maximum display brightness of the pixel point corresponding to the backlight partition; and determining the brightness enhancement coefficient based on the average brightness, the correction coefficient and the maximum display brightness.
  • the brightness enhancement coefficient is determined based on the average brightness, the correction coefficient and the maximum display brightness, including: according to the formula: The brightness enhancement coefficient is calculated; wherein A is the brightness enhancement coefficient, P max is the maximum display brightness, P local is the average brightness, and k is the correction coefficient.
  • the brightness enhancement coefficient is adjusted according to a preset rule, including: recording the number of times the distortion is greater than a preset threshold; obtaining a preset correction difference for the backlight partition; based on the correction coefficient, the number of times and the preset correction difference, calculating the correction coefficient corresponding to each time the distortion is greater than the preset threshold; returning to execute based on the average brightness, the correction coefficient and the maximum display brightness, to determine the brightness enhancement coefficient.
  • the distortion of the light partition includes: According to the formula: The distortion degree CP is calculated.
  • the method further includes: determining the grayscale signal corresponding to each pixel point based on the correspondence between the target brightness and the grayscale signal; inputting the corresponding grayscale signal to each pixel point so that each pixel point displays the corresponding target brightness.
  • a pixel brightness compensation device including:
  • An information determination module used to determine the total number N all of the pixels corresponding to the backlight partition, the initial brightness of each pixel of the backlight partition, and the brightness enhancement coefficient corresponding to the backlight partition;
  • a target brightness determination module used to determine the target brightness of each pixel point of the backlight partition based on the total number Nall , the initial brightness of each pixel point and the brightness enhancement coefficient;
  • a pixel point determination module used to determine the number N over of pixel points whose target brightness is equal to the maximum brightness in the backlight partition;
  • a distortion determination module used to determine the distortion of the backlight partition based on the total number N all and the number N over ;
  • a distortion comparison module used for comparing the distortion with a preset threshold
  • a first execution module configured to adjust the brightness enhancement coefficient according to a preset rule when the distortion is greater than a preset threshold, and return to execute the determination of the target brightness of each pixel of the backlight partition based on the total number N all , the initial brightness of each pixel and the brightness enhancement coefficient;
  • the second execution module is used to determine the brightness enhancement coefficient as the target brightness enhancement coefficient when the distortion is less than or equal to a preset threshold.
  • a computer medium on which a computer program is stored.
  • the computer program is executed by a processor, any one of the pixel brightness compensation methods provided in the present application is implemented.
  • a display device comprising: a display screen; and at least one processor and a memory, wherein the at least one processor is used to process a computer program stored in the memory to implement any one of the pixel brightness compensation methods provided in the present application.
  • the present application determines the target brightness of each pixel in the backlight partition based on the total number N all , the initial brightness of each pixel and the brightness enhancement coefficient; determines the number N over of pixels in the backlight partition whose target brightness is equal to the maximum brightness; determines the distortion of the backlight partition based on the total number N all and the number N over ; compares the distortion with a preset threshold; and when the distortion is greater than the preset threshold, When the distortion is less than or equal to the preset threshold, the brightness enhancement coefficient is adjusted according to the preset rules, and the target brightness of each pixel in the backlight partition is determined based on the total number N all , the initial brightness of each pixel and the brightness enhancement coefficient; when the distortion is less than or equal to the preset threshold, the brightness enhancement coefficient is determined as the target brightness enhancement coefficient.
  • the present application continuously adjusts the brightness enhancement coefficient to obtain the target brightness enhancement coefficient when the distortion is less than or equal to the preset threshold, and then determines the corresponding target brightness of each pixel, so that more pixels are displayed at the maximum brightness without causing picture distortion, while ensuring the contrast and details of the picture, and improving the display effect of the product.
  • FIG. 1 schematically shows a structural diagram of a display device during local dimming.
  • FIG. 2 schematically shows a flow chart of a pixel brightness compensation method provided in an embodiment of the present application.
  • FIG. 3 schematically shows a schematic diagram of the effect of displaying an image when the display device does not perform pixel compensation.
  • FIG. 4 schematically shows the effect of displaying an image when the display device performs pixel compensation but does not correct the brightness enhancement coefficient.
  • FIG. 5 schematically shows a schematic diagram of the effect of displaying an image when a display device performs pixel compensation and corrects a brightness enhancement coefficient.
  • FIG6 schematically shows a schematic structural diagram of a pixel brightness compensation device provided in an embodiment of the present application.
  • FIG. 7 schematically shows a schematic structural diagram of a display device provided in an embodiment of the present application.
  • FIG8 schematically shows a structural block diagram of a computer system for implementing a display device according to an embodiment of the present application.
  • FIG. 1 schematically shows a structural diagram of a display device during local dimming.
  • local dimming requires the image input module 110 to extract the pixel data and brightness features of the input image, wherein the pixel data includes the brightness of each pixel point in the image and the number of pixels in the image, and the brightness features include average brightness, maximum brightness, grayscale histogram, etc.
  • the pixel compensation module 120 determines the pixel compensation value corresponding to each pixel point according to the pixel data of the input image sent by the image input module 110, obtains the compensated pixel data, and then the pixel compensation module 120 sends the compensated pixel data to the liquid crystal panel 140 for display.
  • the backlight adjustment module 130 determines the backlight brightness according to the brightness features of the input image sent by the image input module 110; then, the backlight adjustment module 130 establishes a diffusion model of the backlight source in the mixing cavity of the backlight module 150, thereby analyzing and calculating the backlight distribution projected on the liquid crystal panel 140 after the backlight changes, and obtains the backlight brightness of each pixel point. Finally, the picture displayed on the liquid crystal panel 140 is the result of the combined effect of the adjusted backlight and the compensated pixel data.
  • the pixel brightness compensation method provided in each embodiment of the present application is to perform pixel compensation on an input image.
  • the present application provides a pixel brightness compensation method, which includes S210 to S270, specifically including:
  • S210 Determine the total number N all of the pixels corresponding to the backlight partition, the initial brightness of each pixel of the backlight partition, and the brightness enhancement coefficient corresponding to the backlight partition.
  • the backlight module of the display device is divided into a plurality of backlight partitions, and a better display effect is achieved by adjusting the display effect of each backlight partition.
  • the brightness enhancement factor is a parameter used to adjust the display brightness of each pixel in the backlight partition.
  • this embodiment After inputting the original image, this embodiment obtains the pixel data of the original image, obtains the total number of pixels in the area corresponding to the backlight partition, the initial brightness of each pixel in the backlight partition and the brightness enhancement coefficient corresponding to the backlight partition, so as to perform subsequent pixel brightness compensation steps.
  • determining the brightness enhancement coefficient corresponding to the backlight partition includes: obtaining the correction coefficient corresponding to the backlight partition; determining the maximum display brightness of the pixel point corresponding to the backlight partition; and determining the brightness enhancement coefficient based on the average brightness, the correction coefficient and the maximum display brightness.
  • the correction coefficient is a parameter used to determine the brightness intensity coefficient.
  • the corresponding brightness enhancement coefficient can be obtained by setting the value of the correction coefficient.
  • the brightness enhancement coefficient is determined based on the average brightness, the correction coefficient and the maximum display brightness, including: according to the formula: The brightness enhancement coefficient is calculated; wherein A is the brightness enhancement coefficient, P max is the maximum display brightness, P local is the average brightness, and k is the correction coefficient.
  • the average brightness P local of all pixels in a backlight partition is 200 nits
  • the maximum display brightness P max is 600 nits
  • the correction coefficient k is 0.1
  • the brightness enhancement coefficient may be determined by other calculation formulas, and the present application does not limit this.
  • the target brightness of each pixel is the target brightness determined based on the current brightness enhancement coefficient. It should be understood that after adjusting the brightness enhancement coefficient, the target brightness of each pixel will also change accordingly until a brightness enhancement coefficient that meets the preset conditions is obtained. Based on the total number N all and the initial brightness of each pixel, the brightness parameters such as the average brightness, maximum pixel brightness and minimum pixel brightness of each pixel in the backlight partition can be obtained. Based on different display effects, different brightness parameters can be selected to determine the target brightness of the pixel, and the above brightness parameters can also be further processed to obtain different brightness enhancement coefficients to achieve different display effects.
  • the target brightness of each pixel is determined by an average algorithm, and the average brightness of the backlight partition is determined based on the total number Nall and the total initial brightness Pall .
  • the brightness enhancement coefficient A is 0.477
  • the initial brightness P(x, y) is 400 nits
  • S230 Determine the number N over of pixel points in the backlight subarea whose target brightness is equal to the maximum brightness.
  • the distortion of the backlight partition After obtaining the target brightness, it is necessary to judge the distortion of the backlight partition. If the number of pixels in the backlight partition whose target brightness is equal to the maximum brightness is too large, it will lead to loss of image details. Therefore, it is necessary to determine the number N over of pixels in the backlight partition whose target brightness is equal to the maximum brightness to determine whether the target brightness meets the display effect.
  • S240 Determine the distortion of the backlight partition based on the total number N all and the number N over .
  • the distortion is a performance parameter that characterizes the product when displaying an image.
  • the distortion can be calculated using a variety of formulas. In this application, the formula is: The distortion degree CP is calculated.
  • the preset threshold is a preset threshold of distortion, for example, the preset threshold is set to 2% of distortion acceptable to human eyes, and then the distortion CP is compared with 2% to obtain a comparison result corresponding to the corresponding distortion.
  • the distortion when the distortion is greater than a preset threshold, it means that there are too many pixels whose display brightness is equal to the maximum brightness, and the brightness enhancement coefficient needs to be readjusted to determine a new target brightness. For example, by reducing the brightness enhancement coefficient, the brightness compensated by each pixel becomes smaller, and the target brightness of each pixel is reduced, so the number of pixels whose target brightness is equal to the maximum brightness will decrease.
  • the brightness enhancement coefficient is adjusted according to a preset rule, including: recording the number of times the distortion is greater than a preset threshold; obtaining a preset correction difference for the backlight partition; based on the correction coefficient, the number of times and the preset correction difference, calculating the correction coefficient corresponding to each time the distortion is greater than the preset threshold; returning to execute based on the average brightness, the correction coefficient and the maximum display brightness, to determine the brightness enhancement coefficient.
  • the preset correction difference can affect the change range of the correction coefficient, thereby affecting the brightness gain.
  • the variation of the intensity coefficient can affect the fineness of the pixel brightness compensation for the input image.
  • correction coefficient can be obtained by adding, multiplying, or combining a variety of calculation methods with the preset correction difference to obtain a new correction coefficient, and the present application does not impose any restrictions on this.
  • the brightness enhancement coefficient at this time is determined as the target brightness enhancement coefficient, and the target brightness of each pixel at this time is the display brightness of each pixel after compensation.
  • the present application determines the target brightness of each pixel of the backlight partition based on the total number N all , the initial brightness of each pixel and the brightness enhancement coefficient; determines the number N over of pixels in the backlight partition whose target brightness is equal to the maximum brightness; determines the distortion of the backlight partition based on the total number N all and the number N over ; compares the distortion with a preset threshold; when the distortion is greater than the preset threshold, adjusts the brightness enhancement coefficient according to a preset rule, and returns to execute the target brightness of each pixel of the backlight partition based on the total number N all , the initial brightness of each pixel and the brightness enhancement coefficient; when the distortion is less than or equal to the preset threshold, determines the brightness enhancement coefficient as the target brightness enhancement coefficient.
  • the present application continuously adjusts the brightness enhancement coefficient to obtain the target brightness enhancement coefficient when the distortion is less than or equal to the preset threshold, and then determines the corresponding target brightness of each pixel, so that more pixels are displayed at the maximum brightness without causing excessive distortion of the picture, while ensuring the contrast and details of the picture, and improving the display effect of the product.
  • FIG3 is a schematic diagram showing the effect of displaying an image when the display device does not perform pixel compensation
  • FIG4 is a schematic diagram showing the effect of displaying an image when the display device performs pixel compensation but does not correct the brightness enhancement coefficient
  • FIG5 is a schematic diagram showing the effect of displaying an image when the display device performs pixel compensation and corrects the brightness enhancement coefficient.
  • the white areas in FIG3, FIG4 and FIG5 represent the highlight areas in the image
  • the black areas represent the highlight areas in the image.
  • the gray area and the gray area represent areas with lower brightness in the image. It can be seen that the area of the highlight area in Figure 5 is smaller than that of the highlight area in Figure 4, and is closer to the display effect of the original image in Figure 3. Therefore, the present application can ensure the contrast and details of the picture at the same time and improve the display effect of the product by continuously adjusting the brightness enhancement coefficient and then continuously adjusting the target brightness of each pixel.
  • the method further includes: determining the grayscale signal corresponding to each pixel point based on the correspondence between the target brightness and the grayscale signal; inputting the corresponding grayscale signal to each pixel point so that each pixel point displays the corresponding target brightness.
  • the present application provides a pixel brightness compensation device, comprising:
  • An information determination module 610 is used to determine the total number N all of the pixels corresponding to the backlight partition, the initial brightness of each pixel of the backlight partition, and the brightness enhancement coefficient corresponding to the backlight partition;
  • a target brightness determination module 620 configured to determine a target brightness of each pixel of the backlight partition based on the total number Nall , the initial brightness of each pixel and a brightness enhancement coefficient;
  • a pixel point determination module 630 used to determine the number N over of pixel points whose target brightness is equal to the maximum brightness in the backlight subarea;
  • a distortion determination module 640 configured to determine the distortion of the backlight partition based on the total number N all and the number N over ;
  • a distortion comparison module 650 used to compare the distortion with a preset threshold
  • a first execution module 660 configured to adjust the brightness enhancement coefficient according to a preset rule when the distortion is greater than a preset threshold, and return to execute the determination of the target brightness of each pixel of the backlight partition based on the total number N all , the initial brightness of each pixel and the brightness enhancement coefficient;
  • the second execution module 670 is configured to determine the brightness enhancement coefficient as a target brightness enhancement coefficient when the distortion is less than or equal to a preset threshold.
  • the information determination module 610 includes: a correction coefficient acquisition unit, used to obtain the correction coefficient corresponding to the backlight partition; a brightness determination unit, used to determine the maximum display brightness of the pixel point corresponding to the backlight partition; a coefficient determination unit, used to determine the brightness enhancement coefficient based on the average brightness, the correction coefficient and the maximum display brightness.
  • the coefficient determination unit is further configured to determine the coefficient according to the formula: The brightness enhancement coefficient is calculated; wherein A is the brightness enhancement coefficient, P max is the maximum display brightness, P local is the average brightness, and k is the correction coefficient.
  • the first execution module 660 includes: a number recording unit, used to record the number of times the distortion is greater than a preset threshold; a difference acquisition unit, used to obtain a preset correction difference of the backlight partition; a correction coefficient calculation unit, used to calculate the correction coefficient corresponding to each time the distortion is greater than the preset threshold based on the correction coefficient, the number of times and the preset correction difference; a return execution unit, used to return to execute based on the average brightness, the correction coefficient and the maximum display brightness, and determine the brightness enhancement coefficient.
  • the distortion determination module 640 includes: a distortion calculation unit, configured to calculate the distortion according to the formula: The distortion degree CP is calculated.
  • the device also includes: a grayscale signal adjustment module, which is used to determine the grayscale signal corresponding to each pixel point based on the correspondence between the target brightness and the grayscale signal; and input the corresponding grayscale signal to each pixel point so that each pixel point displays the corresponding target brightness.
  • a grayscale signal adjustment module which is used to determine the grayscale signal corresponding to each pixel point based on the correspondence between the target brightness and the grayscale signal.
  • the present application provides a display device, which display device 700 includes: a display screen 710; and at least one processor 720 and a memory 730, wherein at least one processor 720 is used to process a computer program stored in the memory 730 to implement any pixel brightness compensation method provided in the present application.
  • the processor 720 executes the computer program stored in the memory 730 to control the brightness of the image displayed on the display screen 710.
  • the specific details of the display device provided in this application have been described in detail in the corresponding method embodiment and will not be repeated here.
  • FIG. 8 schematically shows a structural block diagram of a computer system for implementing a display device according to an embodiment of the present application.
  • the computer system 800 includes a processor 801, which may be a CPU (Central Processing Unit) or an MCU (Microcontroller Unit).
  • the processor 801 may perform various appropriate actions and processes according to a program stored in a read-only memory 802 (ROM) or a program loaded from a storage part 808 to a random access memory 803 (RAM).
  • ROM read-only memory
  • RAM random access memory
  • Various programs and data required for system operation are also stored in the random access memory 803.
  • the central processor 801, the read-only memory 802, and the random access memory 803 are connected to each other via a bus 804.
  • An input/output interface 805 Input/Output interface, i.e., I/O interface
  • I/O interface input/output interface
  • the following components are connected to the input/output interface 805: an input section 806 including a keyboard, a mouse, etc.; an output section 807 including a cathode ray tube (CRT), a liquid crystal display (LCD), etc., and a speaker; a storage section 808 including a hard disk, etc.; and a communication section 809 including a network interface card such as a local area network card, a modem, etc. The communication section 809 performs communication processing via a network such as the Internet.
  • a drive 810 is also connected to the input/output interface 805 as needed.
  • a removable medium 811 such as a magnetic disk, an optical disk, a magneto-optical disk, a semiconductor memory, etc., is installed on the drive 810 as needed so that a computer program read therefrom is installed into the storage section 808 as needed.
  • the process described in each method flow chart can be implemented as a computer software program.
  • an embodiment of the present application includes a computer program product, which includes a computer program carried on a computer readable medium, and the computer program contains a program code for executing the method shown in the flow chart.
  • the computer program can be downloaded and installed from the network through the communication part 809, and/or installed from the removable medium 811.
  • the central processor 801 various functions defined in the system of the present application are executed.
  • the computer-readable medium shown in the embodiments of the present application may be a computer-readable signal medium or a computer-readable storage medium or any combination of the above two.
  • the computer-readable storage medium may be, for example, but not limited to, an electrical, magnetic, optical, electromagnetic, infrared, or semiconductor system, device or device, or any combination of the above.
  • Computer-readable storage media may include, but are not limited to: an electrical connection with one or more wires, a portable computer disk, a hard disk, a random access memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM), a flash memory, an optical fiber, a portable compact disc read-only memory (Compact Disc Read-Only Memory, EPROM), ... Memory, CD-ROM), optical storage device, magnetic storage device, or any suitable combination of the above.
  • a computer-readable storage medium may be any tangible medium containing or storing a program, which can be used by or in combination with an instruction execution system, device or device.
  • a computer-readable signal medium may include a data signal propagated in a baseband or as part of a carrier wave, which carries a computer-readable program code.
  • This propagated data signal may take a variety of forms, including but not limited to electromagnetic signals, optical signals, or any suitable combination of the above.
  • a computer-readable signal medium may also be any computer-readable medium other than a computer-readable storage medium, which may send, propagate, or transmit a program for use by or in combination with an instruction execution system, device or device.
  • the program code contained on the computer-readable medium may be transmitted using any appropriate medium, including but not limited to: wireless, wired, etc., or any suitable combination of the above.
  • each box in the flow chart or block diagram can represent a module, a program segment or a part of a code, and the above-mentioned module, program segment or a part of a code contains one or more executable instructions for realizing the specified logical function.
  • the functions marked in the box can also occur in a different order from the order marked in the accompanying drawings. For example, two boxes represented in succession can actually be executed substantially in parallel, and they can sometimes be executed in the opposite order, depending on the functions involved.
  • each box in the block diagram or flow chart, and the combination of the boxes in the block diagram or flow chart can be implemented with a dedicated hardware-based system that performs a specified function or operation, or can be implemented with a combination of dedicated hardware and computer instructions.
  • the technical solution according to the implementation method of the present application can be embodied in the form of a software product, which can be stored in a non-volatile storage medium (which can be a CD-ROM, a USB flash drive, a mobile hard disk, etc.) or on a network, including several instructions to enable a computing device (which can be a personal computer, a server, a touch terminal, or a network device, etc.) to execute the implementation method according to the present application. style.
  • a non-volatile storage medium which can be a CD-ROM, a USB flash drive, a mobile hard disk, etc.
  • a computing device which can be a personal computer, a server, a touch terminal, or a network device, etc.

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Computer Hardware Design (AREA)
  • General Physics & Mathematics (AREA)
  • Theoretical Computer Science (AREA)
  • Liquid Crystal Display Device Control (AREA)

Abstract

L'invention concerne un procédé et un appareil de compensation de luminosité de pixel, un support informatique et un dispositif d'affichage. Le procédé consiste à : déterminer le degré d'écrêtage d'une partition de rétroéclairage ; comparer le degré d'écrêtage à une valeur seuil prédéfinie ; lorsque le degré d'écrêtage est supérieur à la valeur seuil prédéfinie, ajuster un coefficient d'amélioration de luminosité en fonction d'une règle prédéfinie, et revenir à l'exécution de la détermination d'une luminosité cible de chaque point de pixel de la partition de rétroéclairage sur la base du nombre total de points de pixel correspondant à la partition de rétroéclairage, d'une luminosité initiale de chaque point de pixel et du coefficient d'amélioration de luminosité ; et lorsque le degré d'écrêtage est inférieur ou égal à la valeur seuil prédéfinie, déterminer que le coefficient d'amélioration de luminosité est un coefficient d'amélioration de luminosité cible.
PCT/CN2024/092837 2023-07-26 2024-05-13 Procédé et appareil de compensation de luminosité de pixel, support informatique et dispositif d'affichage Pending WO2025020636A1 (fr)

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