WO2020150922A1 - Procédé de compensation de luminosité, composant d'affichage et dispositif électronique - Google Patents

Procédé de compensation de luminosité, composant d'affichage et dispositif électronique Download PDF

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Publication number
WO2020150922A1
WO2020150922A1 PCT/CN2019/072836 CN2019072836W WO2020150922A1 WO 2020150922 A1 WO2020150922 A1 WO 2020150922A1 CN 2019072836 W CN2019072836 W CN 2019072836W WO 2020150922 A1 WO2020150922 A1 WO 2020150922A1
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WIPO (PCT)
Prior art keywords
brightness
monochrome
picture
monochromatic
adjustment value
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PCT/CN2019/072836
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English (en)
Chinese (zh)
Inventor
郭星灵
张肖
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深圳市柔宇科技有限公司
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Publication date
Application filed by 深圳市柔宇科技有限公司 filed Critical 深圳市柔宇科技有限公司
Priority to PCT/CN2019/072836 priority Critical patent/WO2020150922A1/fr
Priority to CN201980073513.6A priority patent/CN113272887A/zh
Publication of WO2020150922A1 publication Critical patent/WO2020150922A1/fr

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    • 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
    • G09G3/36—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 using liquid crystals

Definitions

  • This application relates to the field of display technology, and in particular to a brightness compensation method, a display assembly and an electronic device.
  • the related art display can be driven by a thin film transistor (TFT), and the luminous intensity of the display is affected by the voltage difference between the positive voltage input from the drain of the TFT and the data voltage input from the gate of the TFT.
  • TFT thin film transistor
  • the positive voltage input from the drain of the TFT will drop, resulting in a decrease in the brightness of the display.
  • the embodiments of the present application provide a brightness compensation method, a display assembly and an electronic device.
  • the brightness compensation method of the embodiment of the present application is used for a display component, the display component includes a plurality of pixels arranged in an array, and the brightness compensation method includes:
  • the display component of the embodiment of the present application includes a brightness compensation device and a plurality of pixels, the pixels are arranged in an array, the brightness compensation device includes a picture statistics module and a dynamic compensation module, and the picture statistics module is used to obtain color images and calculate The average gray level of the color picture; the dynamic compensation module is used to find the voltage adjustment value of each pixel in preset voltage adjustment data according to the average gray level, and output the voltage adjustment value to Each of said pixels.
  • the electronic device of the embodiment of the present application includes a main board and the display assembly of the above embodiment, and the main board is connected to the display assembly.
  • the brightness compensation method, display component and electronic device of the embodiments of the present application adjust the voltage of the pixel according to the average gray scale of the color screen, realize real-time brightness compensation according to the color screen, and overcome the brightness and brightness of each gray scale of the screen when the color screen is displayed.
  • the phenomenon of ideal brightness drifting makes each gray-scale brightness of the display component display ideal brightness that conforms to the optical characteristics of the human eye when displaying color images, thereby ensuring uniform gray-scale brightness transition and improving the optical quality of the display component.
  • FIG. 1 is a schematic diagram of modules of an electronic device according to an embodiment of the present application.
  • FIG. 2 is a schematic diagram of modules of a brightness compensation device according to an embodiment of the present application.
  • FIG. 3 is a schematic plan view of a pixel array of a display device according to an embodiment of the present application.
  • FIG. 4 is a schematic flowchart of a brightness compensation method according to an embodiment of the present application.
  • FIG. 5 is a schematic flowchart of a brightness compensation method according to another embodiment of the present application.
  • FIG. 6 is a schematic diagram of modules of a brightness compensation device according to another embodiment of the present application.
  • FIG. 7 is a schematic diagram of comparing the brightness adjustment value and the measured value of the brightness compensation method of the embodiment of the present application.
  • FIG. 8 is a schematic flowchart of a brightness compensation method according to another embodiment of the present application.
  • FIG. 9 is a schematic diagram of the data flow of the brightness compensation method of the embodiment of the present application.
  • FIG. 10 is a schematic flowchart of a brightness compensation method according to still another embodiment of the present application.
  • FIG. 11 is a schematic diagram of modules of a brightness compensation device according to still another embodiment of the present application.
  • FIG. 12 is a schematic flowchart of a brightness compensation method according to another embodiment of the present application.
  • FIG. 13 is a schematic diagram of a monochrome brightness adjustment curve according to an embodiment of the present application.
  • FIG. 14 is a schematic diagram of data flow of a brightness compensation method according to another embodiment of the present application.
  • Electronic device 1000 display assembly 100, display screen 10, brightness compensation device 20, first determination module 21, search calculation unit 212, second determination module 22, picture statistics module 23, dynamic compensation module 24, first gamma control unit 242.
  • connection should be understood in a broad sense, for example, it can be a fixed connection or a detachable connection. Connected or integrally connected; it can be mechanically connected, or electrically connected or can communicate with each other; it can be directly connected, or indirectly connected through an intermediate medium, it can be the internal communication of two components or the interaction of two components relationship.
  • connection should be understood in a broad sense, for example, it can be a fixed connection or a detachable connection. Connected or integrally connected; it can be mechanically connected, or electrically connected or can communicate with each other; it can be directly connected, or indirectly connected through an intermediate medium, it can be the internal communication of two components or the interaction of two components relationship.
  • an embodiment of the present application provides an electronic device 1000.
  • the electronic device 1000 includes a main board 200 and a display assembly 100, and the main board 200 is connected to the display assembly 100.
  • the main board 200 can input corresponding image data signals to the display assembly 100.
  • the display component 100 can process and display the input image signal.
  • the electronic device 1000 of the embodiment of the present application includes, but is not limited to, electronic devices such as displays, mobile phones, tablet computers, notebook computers, e-books, televisions, and wearable smart devices.
  • the display assembly 100 includes a brightness compensation device 20 and a plurality of pixels.
  • the plurality of pixels are arranged in an array to form a pixel array 201.
  • the brightness compensation device 20 includes a picture statistics module 23 and a dynamic compensation module 24.
  • the picture statistics module 23 is used to obtain colors.
  • the dynamic compensation module 24 is used to find the voltage adjustment value of each pixel in the preset voltage adjustment data according to the average gray scale, and output the voltage adjustment value to each pixel.
  • the aforementioned array arrangement is not limited to the manner shown in the figure, and the array arrangement may mean that multiple pixels are arranged in rows and columns.
  • the display assembly 100 may include a display screen 10, which includes a plurality of pixels arranged in an array.
  • the brightness compensation method of the embodiment of the present application is used for the display component 100, the display component 100 includes a plurality of pixels arranged in an array, and the brightness compensation method includes:
  • Step S23 Obtain the color picture and calculate the average gray level of the color picture
  • Step S24 Find the voltage adjustment value of each pixel in the preset voltage adjustment data according to the average gray scale, and output the voltage adjustment value to each pixel.
  • the brightness compensation method, the display assembly 100 and the electronic device 1000 of the embodiments of the present application adjust the voltage of the pixels according to the average gray scale of the color screen, realize real-time brightness compensation according to the color screen, and overcome the gray scale of the screen when the color screen is displayed.
  • the phenomenon of the drift between the brightness and the ideal brightness enables the brightness of each gray scale of the display device 100 to display an ideal brightness that conforms to the optical characteristics of the human eye when displaying a color image, thereby ensuring uniform gray scale brightness transition and improving the optical quality of the display device 100.
  • the display assembly 100 displays a color picture
  • the color picture can be understood as more than one type of color. If the voltage of each pixel of the display component 100 is adjusted only when the display component 100 displays a single gray scale, it is easy to cause the brightness of the pixels below the average gray scale to be darker and higher than the average gray scale when displaying a color screen. The phenomenon that the brightness of the pixel is brighter, that is, the brightness of each gray scale of the screen and the ideal brightness drift when a color screen is displayed.
  • the color image when the color image is displayed, the color image is obtained and the average gray level of the color image is calculated, so as to realize the real-time adjustment of pixels according to the average gray level of the color image, which can slow down or even avoid the color image.
  • the gray-scale brightness and the ideal brightness drift thereby improving the display effect of the display assembly 100.
  • one or more pixels may constitute a pixel unit, for example, two pixels constitute a pixel unit.
  • the two pixels may be a red pixel and a green pixel.
  • three pixels constitute one pixel unit, and in such a pixel unit, the three pixels may be red pixels, green pixels, and blue pixels.
  • step S23 the average gray level of each color pixel when displaying a color screen is calculated. Specifically, in the embodiments of the present application, the average gray level of red pixels, the average gray level of green pixels, and the average gray level of blue pixels are calculated respectively.
  • step S24 according to the average gray scale of each color pixel, the corresponding voltage adjustment value is searched in the preset voltage adjustment data of each color pixel, and the voltage adjustment value is output to the pixel of that color.
  • the voltage adjustment value corresponding to the blue pixel is searched in the preset voltage adjustment data of the blue pixel, and the voltage adjustment value is output to the blue pixel; Find the voltage adjustment value corresponding to the green pixel in the voltage adjustment data, and output the voltage adjustment value to the green pixel; find the voltage adjustment value corresponding to the red pixel in the preset voltage adjustment data of the red pixel, and output the voltage adjustment value to Red pixels.
  • the monochrome picture includes a red picture, a green picture, and a blue picture.
  • the preset voltage adjustment data includes monochromatic voltage adjustment values of different gray levels, and the monochromatic voltage adjustment values are obtained by the following steps:
  • Step S11 processing the monochrome image and the white image to obtain the brightness adjustment value of the monochrome image and the monochrome measurement value of the white image respectively;
  • Step S12 Obtain the monochrome voltage adjustment values of different gray levels according to the brightness adjustment value of the monochrome picture and the monochrome brightness measurement value of the white picture.
  • the preset voltage adjustment data includes monochromatic voltage adjustment values of different gray levels
  • the brightness compensation device 20 includes a first determining module 21, which is used to process monochromatic colors. Screen and white screen to obtain the brightness adjustment value of the monochrome screen and the monochrome measurement value in the white screen respectively, and to obtain different gray levels according to the brightness adjustment value of the monochrome screen and the monochrome brightness measurement value in the white screen Monochrome voltage adjustment value.
  • the monochromatic voltage adjustment value of different gray levels can be determined.
  • white brightness is a mixture of red, green, and blue brightness
  • R:G: B 0.3: 0.6: 0.1
  • Lv w white luminance value
  • the measured value and the measured value of the green pixel is a blue pixel the red pixel.
  • the brightness adjustment value of each gray-scale monochrome picture and the determination of the monochrome measurement value in the white picture are realized.
  • the brightness compensation method includes:
  • Step S13 Calculate the monochrome brightness difference according to the brightness adjustment value of the monochrome picture and the monochrome brightness measurement value in the white picture;
  • Step S14 Calculate the monochromatic current difference according to the monochromatic brightness difference
  • Step S15 Calculate the monochromatic voltage adjustment value according to the monochromatic current difference.
  • the first determining module 21 is configured to calculate the monochrome brightness difference according to the brightness adjustment value of the monochrome picture and the monochrome brightness measurement value in the white picture, and to calculate the monochrome current according to the monochrome brightness difference. Difference, and used to calculate the monochromatic voltage adjustment value based on the monochromatic current difference.
  • the monochrome voltage adjustment values of different gray levels according to the brightness adjustment value of the monochrome picture and the monochrome brightness measurement value in the white picture.
  • the calculation process of the green voltage adjustment value of each gray level and the blue voltage adjustment value of each gray level is similar to the calculation process of the red voltage adjustment value of each gray level, and will not be repeated here to avoid redundancy.
  • the display assembly 100 may include a burnable voltage adjustment value storage unit 30 and a random access memory (RAM) 32, the first determination module 21 includes a search calculation unit 212, and the dynamic compensation module 24 includes a first gamma A control (Digital gamma control, DGC) unit 242.
  • the monochromatic voltage adjustment values of different gray scales are determined through step S15, they can be stored in the voltage adjustment value storage unit 30.
  • the data of the color picture may be stored in a random access memory (RAM) 32, and the picture statistics module 23 may obtain the color picture from the random access memory (RAM) 32 and perform statistics on it to obtain an average gray scale.
  • the search and calculation unit 212 can find the corresponding monochrome voltage adjustment value according to the average gray level and calculate the corresponding register compensation value, and respectively add the initial register value and the register compensation value of each color and each gray level to generate each color and each gray level. And then output the new register value to the first gamma control unit 242, so that the first gamma control unit 242 outputs control data according to the new register value to complete the compensation for the color image.
  • a control voltage value is formed.
  • the control voltage value is the sum of the initial voltage value and the voltage adjustment value.
  • the brightness compensation method, the display assembly 100 and the electronic device 1000 of the embodiments of the present application are based on the existing circuit drive architecture, and add the search calculation unit 212 and the first gamma control unit 242, according to the average color image Grayscale, real-time generation of monochromatic voltage adjustment value to compensate for the influence of voltage drop on the display effect.
  • This realizes real-time brightness compensation according to the color screen overcomes the phenomenon of the brightness of each gray scale of the screen and the ideal brightness when the color screen is displayed, and makes the brightness of each gray scale of the display module 100 display ideally in line with human eyes when displaying a color screen.
  • the brightness of the academic characteristics helps to ensure uniform gray-scale brightness transition and improve the optical quality of the display assembly 100.
  • the preset voltage adjustment data includes monochrome brightness adjustment curves of different gray levels, and the monochrome brightness adjustment curves of different gray levels are obtained by the following steps:
  • Step S16 processing the monochrome image and the white image to obtain the brightness adjustment value of the monochrome image and the monochrome measurement value of the white image respectively;
  • Step S17 Obtain the monochrome brightness adjustment curves of different gray levels according to the brightness adjustment value of the monochrome picture and the monochrome brightness measurement value in the white picture.
  • the preset voltage adjustment data includes monochrome brightness adjustment curves of different gray levels
  • the brightness compensation device 20 includes a second determining module 22, which is used to process monochrome Screen and white screen to obtain the brightness adjustment value of the monochrome screen and the monochrome measurement value in the white screen respectively, and to obtain different gray levels according to the brightness adjustment value of the monochrome screen and the monochrome brightness measurement value in the white screen Monochromatic brightness adjustment curve.
  • the brightness compensation method includes:
  • Step S18 Calculate the monochrome brightness difference according to the brightness adjustment value of the monochrome picture and the monochrome brightness measurement value in the white picture;
  • Step S19 Calculate the monochromatic current difference according to the monochromatic brightness difference
  • Step S20 Calculate the monochromatic voltage difference according to the monochromatic current difference
  • Step S21 Calculate the monochromatic curve adjustment value according to the monochromatic voltage difference
  • Step S22 Determine the monochromatic brightness adjustment curve according to the monochromatic curve adjustment value.
  • the second determining module 22 is used to calculate the monochrome brightness difference according to the brightness adjustment value of the monochrome picture and the monochrome brightness measurement value in the white picture, and to calculate the monochrome current according to the monochrome brightness difference.
  • the difference is used to calculate the monochrome voltage difference based on the monochrome current difference; and used to calculate the monochrome curve adjustment value based on the monochrome voltage difference; and used to determine the monochrome brightness adjustment curve based on the monochrome curve adjustment value.
  • Step S18, step S19, and step S20 are similar to step S13, step S14, and step S15. To avoid redundancy, they will not be repeated here.
  • the register compensation value of each gray scale of each color can also be calculated based on the monochrome voltage difference and used as the monochrome curve adjustment value.
  • the corresponding monochromatic curve adjustment value can be added to the original monochromatic brightness curve to determine the monochromatic brightness adjustment curve of each gray scale. It can be understood that since there is generally no correction for gray level 0, there are a total of 255 monochrome curve adjustment values for gray level 1 to 255 gray levels, so each color generates 255 monochrome brightness adjustment curves corresponding to 255 gray levels. That is, Gamma curve: Gamma1, Gamma2...Gamma254 and Gamma255, as shown in Figure 13.
  • the display assembly 100 may include a brightness adjustment curve storage unit 40, a random access memory (RAM) 32, and the dynamic compensation module 24 includes a second gamma control unit 244.
  • the monochrome brightness adjustment curve of each gray scale is determined through step S22, it can be stored in the brightness adjustment curve storage unit 40.
  • the data of the color picture may be stored in a random access memory (RAM) 32, and the picture statistics module 23 may obtain the color picture from the random access memory (RAM) 32 and perform statistics on it to obtain an average gray scale.
  • the second gamma control unit 244 switches to the corresponding monochrome brightness adjustment curve according to the average gray scale, thereby outputting control data, which forms a control voltage after digital-to-analog conversion, thereby completing compensation for the color image.
  • the brightness compensation method, the display assembly 100 and the electronic device 1000 of the embodiment of the present application have adjusted different monochrome brightness adjustment curves for different voltage drops in the early stage, which accurately compensates the influence of the voltage drop on the color image display effect.
  • the implementation process is simple, time-consuming, extremely real-time, and the compensation effect is good.
  • This realizes real-time brightness compensation according to the color screen overcomes the phenomenon of the brightness of each gray scale of the screen and the ideal brightness when the color screen is displayed, and makes the brightness of each gray scale of the display module 100 display ideally in line with human eyes when displaying a color screen.
  • the brightness of the academic characteristics helps to ensure uniform gray-scale brightness transition and improve the optical quality of the display assembly 100.
  • each part of this application can be executed by hardware, software, firmware or a combination thereof.
  • multiple steps or methods can be executed by software or firmware stored in a memory and executed by a suitable instruction execution system.
  • a logic gate circuit for performing logic functions on data signals
  • Discrete logic circuits Discrete logic circuits
  • application-specific integrated circuits with suitable combinational logic gates
  • FPGA field programmable gate array
  • the functional units in the various embodiments of the present application may be integrated into one processing module, or each unit may exist alone physically, or two or more units may be integrated into one module.
  • the above-mentioned integrated modules can be executed in the form of hardware or software function modules. If the integrated module is executed in the form of a software function module and sold or used as an independent product, it can also be stored in a computer readable storage medium.
  • the storage medium mentioned above may be a read-only memory, a magnetic disk or an optical disk, etc.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Physics & Mathematics (AREA)
  • Computer Hardware Design (AREA)
  • General Physics & Mathematics (AREA)
  • Theoretical Computer Science (AREA)
  • Control Of Indicators Other Than Cathode Ray Tubes (AREA)

Abstract

L'invention concerne un procédé de compensation de luminosité, un composant d'affichage (100) et un dispositif électronique (1000). Le procédé de protection contre les surintensités est appliqué à l'écran d'affichage (100). Le procédé de compensation de luminosité consiste : (Étape S23) à obtenir une image en couleur, et à calculer une valeur d'échelle de gris moyenne de l'image en couleur ; et (étape S24) à rechercher, dans des données de réglage de tension prédéfinies, des valeurs de réglage de tension de pixels respectifs en fonction de la valeur d'échelle de gris moyenne, et à délivrer en sortie les valeurs de réglage de tension aux pixels respectifs.
PCT/CN2019/072836 2019-01-23 2019-01-23 Procédé de compensation de luminosité, composant d'affichage et dispositif électronique WO2020150922A1 (fr)

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PCT/CN2019/072836 WO2020150922A1 (fr) 2019-01-23 2019-01-23 Procédé de compensation de luminosité, composant d'affichage et dispositif électronique
CN201980073513.6A CN113272887A (zh) 2019-01-23 2019-01-23 亮度补偿方法、显示组件和电子装置

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CN112951139A (zh) * 2021-02-08 2021-06-11 深圳市华星光电半导体显示技术有限公司 灰阶调整方法及装置

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CN114898699A (zh) * 2022-06-29 2022-08-12 Tcl华星光电技术有限公司 显示控制方法及显示面板

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