WO2018201541A1 - 一种有机发光面板的开机亮度控制方法 - Google Patents

一种有机发光面板的开机亮度控制方法 Download PDF

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Publication number
WO2018201541A1
WO2018201541A1 PCT/CN2017/086231 CN2017086231W WO2018201541A1 WO 2018201541 A1 WO2018201541 A1 WO 2018201541A1 CN 2017086231 W CN2017086231 W CN 2017086231W WO 2018201541 A1 WO2018201541 A1 WO 2018201541A1
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Prior art keywords
brightness
displayed
pixels
pixel
threshold
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PCT/CN2017/086231
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English (en)
French (fr)
Inventor
王振岭
黄泰钧
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深圳市华星光电半导体显示技术有限公司
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Priority to US15/536,944 priority Critical patent/US10192480B2/en
Publication of WO2018201541A1 publication Critical patent/WO2018201541A1/zh

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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
    • G09G3/22—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 using controlled light sources
    • G09G3/30—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 using controlled light sources using electroluminescent panels
    • G09G3/32—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 using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED]
    • G09G3/3208—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 using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED] organic, e.g. using organic light-emitting diodes [OLED]
    • 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
    • G09G3/22—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 using controlled light sources
    • G09G3/30—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 using controlled light sources using electroluminescent panels
    • G09G3/32—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 using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED]
    • G09G3/3208—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 using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED] organic, e.g. using organic light-emitting diodes [OLED]
    • G09G3/3225—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 using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED] organic, e.g. using organic light-emitting diodes [OLED] using an active matrix
    • 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
    • G09G2320/0271—Adjustment of the gradation levels within the range of the gradation scale, e.g. by redistribution or clipping
    • G09G2320/0276—Adjustment of the gradation levels within the range of the gradation scale, e.g. by redistribution or clipping for the purpose of adaptation to the characteristics of a display device, i.e. gamma correction
    • 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
    • G09G2320/04—Maintaining the quality of display appearance
    • G09G2320/043—Preventing or counteracting the effects of ageing
    • G09G2320/046—Dealing with screen burn-in prevention or compensation of the effects thereof
    • 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
    • G09G2320/06—Adjustment of display parameters
    • G09G2320/0626—Adjustment of display parameters for control of overall brightness
    • 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
    • G09G2320/06—Adjustment of display parameters
    • G09G2320/0693—Calibration of display systems
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2330/00—Aspects of power supply; Aspects of display protection and defect management
    • G09G2330/02—Details of power systems and of start or stop of display operation
    • G09G2330/026—Arrangements or methods related to booting a display
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2370/00—Aspects of data communication
    • G09G2370/14—Use of low voltage differential signaling [LVDS] for display data communication

Definitions

  • the present invention relates to the field of display technologies, and in particular, to a method for controlling brightness of an organic light-emitting panel.
  • AMOLEDs active matrix organic light-emitting displays
  • the third-generation display technology following the LCD has been increasingly used in portable products such as mobile phones and digital cameras, and medium-sized AMOLED TV screens are about to begin mass production.
  • the OLED is a current-type device, the larger the current is, the larger the heat of the OLED device is.
  • the existing driving device and the driving method may cause the temperature of the panel to be too high if the brightness of the screen is too high during the startup, thereby causing the OLED to be OLED.
  • the device ages too fast or burns out; the excessive brightness of the local area will cause excessive current in the local area, resulting in excessive voltage shift of the driving TFT (Thin Film Transisto) and residual image.
  • TFT Thin Film Transisto
  • the technical problem to be solved by the present invention is to provide a method for controlling the brightness of the organic light-emitting panel, which can reduce the probability of panel residual image caused by excessive voltage offset during startup, and reduce the speed of panel device aging due to excessive local current. .
  • a technical solution adopted by the present invention is to provide a method for controlling the brightness of the organic light-emitting panel, wherein the organic light-emitting panel includes a plurality of pixels, and the method includes: obtaining each pixel corresponding to the booting process The brightness to be displayed is compared with a preset brightness threshold; if the brightness to be displayed is greater than the brightness threshold, the brightness to be displayed is adjusted to be less than or equal to the brightness threshold; using the adjusted brightness to be displayed Adjusting the grayscale value of the pixel to be displayed; using the adjusted grayscale value to be displayed to control the corresponding pixel for display; gradually increasing the brightness threshold value with time, and returning to obtain the corresponding pixel to be displayed during the booting process brightness.
  • a technical solution adopted by the present invention is to provide a method for controlling the brightness of the organic light-emitting panel, wherein the organic light-emitting panel includes a plurality of pixels, and the method includes: obtaining each pixel corresponding to the booting process The brightness to be displayed; the brightness to be displayed for each pixel and the The brightness threshold is set to be compared; if the brightness to be displayed is greater than the brightness threshold, the brightness to be displayed is adjusted to be less than or equal to the brightness threshold; and the pixels corresponding to the brightness control to be displayed are used for display.
  • the present invention adopts a technical solution to provide an organic light emitting panel, wherein the panel includes: a processor, a memory, a receiver, and a display, the processor is connected to the receiver and the display; and the receiver is used to acquire each The brightness of the pixels to be displayed during the booting process; the processor is configured to compare the brightness to be displayed of each pixel with a preset brightness threshold; if the brightness to be displayed is greater than the brightness threshold, the brightness to be displayed is adjusted to be less than or It is equal to the brightness threshold; the display is used to display the pixels corresponding to the adjusted brightness to be displayed.
  • the invention has the beneficial effects that the present invention firstly obtains the brightness to be displayed corresponding to each pixel during the booting process, and then compares the brightness to be displayed of each pixel with a preset brightness threshold. If the brightness to be displayed is greater than the brightness threshold, the brightness to be displayed is adjusted to be less than or equal to the brightness threshold, and then the pixels corresponding to the brightness control to be displayed are adjusted for display, thereby reducing the brightness of the startup screen, thereby reducing the voltage offset at the time of startup. Excessively causing the residual image of the panel, reducing the speed of the panel device aging too much due to excessive local current.
  • FIG. 1 is a schematic flow chart of an embodiment of a method for controlling brightness of an organic light-emitting panel according to the present invention
  • FIG. 2 is a schematic flow chart of another embodiment of a method for controlling brightness of an organic light-emitting panel according to the present invention
  • FIG. 3 is a schematic structural diagram of one module of the brightness control of the organic light-emitting panel of the present invention.
  • FIG. 4 is a schematic flow chart of still another embodiment of a method for controlling brightness of an organic light-emitting panel according to the present invention.
  • FIG. 5 is a schematic diagram of adjusting the brightness of the organic light-emitting panel of the present invention.
  • FIG. 6 is another schematic diagram of another adjustment of the brightness of the organic light-emitting panel of the present invention.
  • Fig. 7 is a schematic structural view of an embodiment of an organic light-emitting panel of the present invention.
  • FIG. 1 is a schematic flow chart of an embodiment of a method for controlling brightness of an organic light-emitting panel according to the present invention. It should be noted that the method of the present invention is not limited to the sequence of the flow shown in FIG. 1 if substantially the same result is obtained.
  • the organic light emitting panel of the present invention includes a plurality of pixels. As shown in Figure 1, The method comprises the following steps:
  • S101 Acquire a brightness to be displayed corresponding to each pixel during the booting process.
  • each pixel is not lit at the same time, but a part is lit first, and then a part is lit. If the brightness of the part of the pixel to be illuminated is too high, the brightness of the local area of the OLED panel may be too high, which means that the current of the local area of the OLED panel is too large, which causes the voltage of the driving TFT to be shifted. Large, this will cause the OLED panel device to age too fast or burn, and will cause the OLED panel to appear afterimage.
  • the afterimage phenomenon refers to the residual image on the display. That is, when the screen is switched on the display, the previous screen does not disappear immediately, and the visual effect appears at the same time as the second screen, and will slowly disappear.
  • the brightness of the portion of the pixel to be displayed that is first brightened is controlled, that is, the current value of the portion of the pixel is controlled.
  • the preset brightness threshold refers to a critical brightness value of the OLED panel without residual image. During the power-on threshold time, the brightness to be displayed of each pixel is compared with a preset brightness threshold.
  • one specific embodiment of adjusting the brightness to be displayed to be less than or equal to the brightness threshold is as follows:
  • K Y th /Y′ max
  • Y′ is the brightness to be displayed before the adjustment
  • Y′ out is the brightness to be displayed after the adjustment
  • Y th is the brightness threshold
  • Y′ max is the brightness to be displayed of the plurality of pixels. Maximum brightness.
  • the pixel corresponding to the brightness control to be displayed is directly displayed, and if the brightness of the portion of the pixel to be displayed is greater than the brightness threshold, The brightness of the portion of the pixel to be displayed after being illuminated is adjusted to be less than or equal to the brightness threshold.
  • the brightness to be displayed of each pixel is less than or equal to the brightness threshold during the power-on threshold time.
  • the brightness to be displayed corresponding to each pixel during the booting process is obtained, and then Comparing the to-be-displayed brightness of each pixel with a preset brightness threshold, and if the brightness to be displayed is greater than the brightness threshold, adjusting the brightness to be displayed to be less than or equal to the brightness threshold, and further controlling the corresponding pixel by using the adjusted brightness to be displayed. Displaying, reducing the brightness of the boot screen, thereby reducing the probability of panel residual image caused by excessive voltage offset during booting, and reducing the speed of panel device aging too much due to excessive local current.
  • FIG. 2 is a schematic flow chart of another embodiment of a method for controlling the brightness of the organic light-emitting panel of the present invention.
  • the method includes the following steps:
  • S201 Acquire a grayscale value to be displayed corresponding to each pixel.
  • the grayscale value of the pixel is output from the front end, it is necessary to first obtain the grayscale value to be displayed corresponding to each pixel, and then calculate the grayscale value to be displayed corresponding to each pixel as corresponding to each pixel.
  • the brightness to be displayed Specifically, the calculation process is as shown in the following steps.
  • the different primary colors corresponding to each pixel are specifically red/green/blue (Red/Green/Blue, R/G/B). That is, the primary color having the largest grayscale value to be displayed in R/G/B is extracted.
  • gamma correction is to edit the gamma curve of the image to perform nonlinear tone editing on the image, detect the dark part and the light part in the image signal, and increase the ratio of the two, thereby improving Image contrast effect. That is, the main purpose of the gamma correction is to increase the contrast of the grayscale values to be displayed.
  • the specific process of gamma correction for the maximum grayscale value to be displayed is as follows:
  • the gamma correction of the maximum gray scale value to be displayed is performed by the following formula:
  • Y is the maximum gray scale value to be displayed before gamma correction
  • Y' is the maximum gray scale value to be displayed after gamma correction
  • GMA is the gamma coefficient of the organic light emitting panel
  • N is the maximum allowed by the organic light emitting panel The grayscale value can be displayed.
  • S204 The maximum gray scale value to be displayed after the gamma correction is used as the brightness to be displayed corresponding to the pixel.
  • S206 Adjust the brightness to be displayed of each pixel to be less than or equal to a preset brightness threshold.
  • the brightness to be displayed is adjusted to be less than or equal to the brightness threshold. If the brightness to be displayed is less than or equal to the brightness threshold, the brightness control corresponding to the display is directly used. The pixels are displayed.
  • S207 Adjust the grayscale value of the pixel to be displayed by using the adjusted brightness to be displayed.
  • FIG. 3 is a schematic diagram of one of the module architectures of the startup brightness control of the organic light-emitting panel of the present invention.
  • the module 31 represents a video signal;
  • the module 32LVDS RX represents the data of the LVDS format is unpacked into an RGB data format;
  • the brightness detection control of the module 33 indicates that the brightness of the pixel to be displayed of the input panel is greater than the preset brightness threshold. Decrease the brightness value of the picture, and keep the brightness of the existing picture when the brightness of the pixel to be displayed of the input panel is less than the preset brightness threshold;
  • the module 34Gamma Transform represents the adjustment of the gamma white balance;
  • the module 35RGB 2RGBW represents the data of the RGB format.
  • the data is converted into RGBW format
  • the module 36Ext_comp represents the panel TFT and OLED parameters responsible for the collection, and the image uniformity is compensated by the algorithm
  • the module 37TCON_Data map represents the gate driver and the source driver (Source). The timing of the Driver) outputs the RGB data to the mLVDS
  • the module 38TCON_ctrl indicates the timing of combining the Gate Driver and the Source Driver, and the parameters satisfy the required control signals
  • the module 39mLVDS indicates that the data in the RGB format is converted into the data in the mLVDS format.
  • the video signal input from the module 31 is the grayscale value of the pixel to be displayed. Therefore, in the above embodiment, the grayscale value of the pixel to be displayed needs to be processed and converted into the luminance to be displayed before being compared with the preset luminance threshold.
  • LVDS Low-Voltage Differential Signaling
  • the core of this technology is the use of very low voltage swing high-speed differential transmission data, can achieve point-to-point or point-to-multipoint connection, with low power consumption, low bit error rate, low crosstalk and low radiation, etc.
  • the medium can be a copper PCB connection or a balanced cable.
  • LVDS technology is used for simple line driver and receiver physical layer devices as well as for more complex interface communication chipsets. Among them, the difference between LVDS and mLVDS is that the output data is arranged in different ways.
  • the module 33 brightness detection control is also the above embodiment.
  • the output signal of the module 38TCON_ctrl is transmitted to the scan line of the panel, and the output signal of the module 39mLVDS is transmitted to the data line of the panel.
  • the brightness to be displayed corresponding to each pixel during the booting process is obtained, and then Comparing the to-be-displayed brightness of each pixel with a preset brightness threshold, and if the brightness to be displayed is greater than the brightness threshold, adjusting the brightness to be displayed to be less than or equal to the brightness threshold, and further controlling the corresponding pixel by using the adjusted brightness to be displayed. Displaying, reducing the brightness of the boot screen, thereby reducing the probability of panel residual image caused by excessive voltage offset during booting, and reducing the speed of panel device aging too much due to excessive local current.
  • FIG. 4 is a schematic flow chart of still another embodiment of the method for controlling the brightness of the organic light-emitting panel of the present invention.
  • the method includes the following steps:
  • S401 Acquire a brightness to be displayed corresponding to each pixel during the booting process.
  • S402 Adjust the brightness to be displayed of each pixel to be no more than a preset brightness threshold.
  • the brightness to be displayed of each pixel is compared with a preset brightness threshold. If the brightness to be displayed is greater than the brightness threshold, the brightness to be displayed is adjusted to be less than or equal to the brightness threshold; if the brightness to be displayed is less than or equal to the brightness threshold, the pixels corresponding to the brightness control to be displayed are directly displayed.
  • S404 Gradually increase the brightness threshold with time.
  • the brightness to be displayed gradually increases with the increase of the brightness threshold.
  • the brightness threshold of the current time is calculated by interpolation according to a preset brightness threshold corresponding to different time points. Further, the brightness threshold is set to be greater than or equal to the maximum displayable brightness allowed by the organic light emitting panel after the predetermined time.
  • FIG. 5 and FIG. 6 are two adjustment diagrams of the startup brightness of the organic light-emitting panel of the present invention.
  • Figure 5 is linearly adjusted
  • Figure 6 is non-linearly adjusted.
  • the time period from the time t 0 to the time t 1 is the above-described power-on threshold time.
  • Time t 1 from the start to the time period t 8 to gradually increase the luminance threshold, the process further increase pixel brightness to be displayed.
  • the brightness to be displayed corresponding to each pixel in the booting process is first obtained, and then the brightness to be displayed of each pixel is compared with a preset brightness threshold. If the brightness to be displayed is greater than the brightness threshold, the image is to be displayed.
  • the brightness of the display is adjusted to be less than or equal to the brightness threshold, and then the pixels corresponding to the brightness control to be displayed are adjusted for display, thereby reducing the brightness of the startup screen, thereby reducing the probability of panel residual image caused by excessive voltage offset during startup, and reducing the locality due to local Excessive current causes the panel device to age too fast.
  • FIG. 7 is a schematic structural view of an embodiment of an organic light emitting panel of the present invention.
  • the organic light emitting panel can perform the steps performed by the organic light emitting panel in the above method.
  • the processing device includes a processor 71, a memory 72 coupled to the processor 71, a receiver 73, and a display 74.
  • the memory 72 is used to store an operating system, instructions executed by the processor 71, and received messages and the like.
  • the receiver 73 is configured to acquire the brightness to be displayed corresponding to each pixel during the booting process.
  • the display 74 is configured to display the pixels corresponding to the adjusted brightness control to be displayed.
  • the processor 71 is configured to compare the brightness to be displayed of each pixel with a preset brightness threshold; if the brightness to be displayed is greater than the brightness threshold, adjust the brightness to be displayed to be less than or equal to the brightness threshold.
  • the processor 71 is further configured to obtain a grayscale value to be displayed corresponding to each pixel, and calculate a to-be-displayed luminance corresponding to each pixel according to the grayscale value to be displayed.
  • the processor 71 is further configured to extract a maximum grayscale value to be displayed from the grayscale values to be displayed of different primary colors corresponding to each pixel; perform gamma correction on the maximum grayscale value to be displayed; and correct the gamma
  • the maximum grayscale value to be displayed is used as the brightness to be displayed corresponding to the pixel.
  • the processor 71 is further configured to adjust the grayscale value of the pixel to be displayed by using the adjusted brightness to be displayed; and use the adjusted grayscale value to be displayed to control the corresponding pixel for display.
  • the processor 71 is also used to gradually increase the brightness threshold over time.
  • the processor 71 is further configured to calculate a brightness threshold of the current time by interpolation according to a preset brightness threshold corresponding to different time instants.
  • the processor 71 is further configured to set the brightness threshold to be greater than or equal to a maximum displayable brightness allowed by the organic light emitting panel after a predetermined time.
  • the brightness to be displayed corresponding to each pixel during the booting process is obtained, and then the brightness to be displayed of each pixel is compared with a preset brightness threshold, if the brightness to be displayed is greater than the brightness.
  • the threshold value is used to adjust the brightness to be displayed to be less than or equal to the brightness threshold value, and then use the adjusted pixels corresponding to the brightness control to be displayed for display, thereby reducing the brightness of the startup screen, thereby reducing the residual voltage of the panel caused by excessive voltage offset during startup. The probability of reducing the aging of the panel device due to excessive local current is reduced.

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  • Engineering & Computer Science (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)
  • Electroluminescent Light Sources (AREA)
  • Control Of El Displays (AREA)

Abstract

一种有机发光面板的开机亮度控制方法，包括：获取每个像素在开机过程中所对应的待显示亮度；将每个像素的待显示亮度与预设的亮度阈值进行比较；若待显示亮度大于亮度阈值，则将待显示亮度调整成小于或等于亮度阈值；利用调整后的待显示亮度对像素的待显示灰阶值进行调整；利用调整后的待显示灰阶值控制对应的像素进行显示；随时间逐渐增大亮度阈值，并返回获取每个像素在开机过程中所对应的待显示亮度。通过上述方式能够减少开机时电压偏移过大造成面板残影的几率，降低由于局部电流过大造成面板器件老化过快的速度。

Description

一种有机发光面板的开机亮度控制方法 【技术领域】
本发明涉及显示技术领域，特别是涉及一种有机发光面板的开机亮度控制方法。
【背景技术】
在平板显示技术中，主动矩阵有机发光显示器(AMOLED)以其轻薄、主动发光、快响应速度、广视角、色彩丰富及高亮度、低功耗、耐高低温等众多优点而被业界公认为是继LCD之后的第三代显示技术，目前已越来越多地应用在手机、数码相机等便携式产品中，中等尺寸的AMOLED电视屏也即将开始规模生产。但是，由于OLED为电流型器件，电流越大，OLED器件的发热越大，现有的驱动装置和驱动方法，在开机时如果画面亮度过高，会导致面板局部区域温度过高，进而造成OLED器件老化过快或烧毁现象；局部区域过高的亮度，会造出局部区域电流过大，导致驱动TFT(Thin Film Transisto，薄膜场效应晶体管)的电压偏移过大，出现残影。
【发明内容】
本发明主要解决的技术问题是提供一种有机发光面板的开机亮度控制方法，能够减少开机时电压偏移过大造成面板残影的几率，降低由于局部电流过大造成面板器件老化过快的速度。
为解决上述技术问题，本发明采用的一个技术方案是：提供一种有机发光面板的开机亮度控制方法，其中，有机发光面板包括多个像素，方法包括：获取每个像素在开机过程中所对应的待显示亮度；将每个像素的待显示亮度与预设的亮度阈值进行比较；若待显示亮度大于亮度阈值，则将待显示亮度调整成小于或等于亮度阈值；利用调整后的待显示亮度对像素的待显示灰阶值进行调整；利用调整后的待显示灰阶值控制对应的像素进行显示；随时间逐渐增大亮度阈值，并返回获取每个像素在开机过程中所对应的待显示亮度。
为解决上述技术问题，本发明采用的一个技术方案是：提供一种有机发光面板的开机亮度控制方法，其中，有机发光面板包括多个像素，方法包括：获取每个像素在开机过程中所对应的待显示亮度；将每个像素的待显示亮度与预 设的亮度阈值进行比较；若待显示亮度大于亮度阈值，则将待显示亮度调整成小于或等于亮度阈值；利用调整后的待显示亮度控制对应的像素进行显示。
为解决上述技术问题，本发明采用的一个技术方案是：提供一种有机发光面板，其中，面板包括：处理器、存储器、接收器及显示器，处理器连接接收器及显示器；接收器用于获取每个像素在开机过程中所对应的待显示亮度；处理器用于将每个像素的待显示亮度与预设的亮度阈值进行比较；若待显示亮度大于亮度阈值，则将待显示亮度调整成小于或等于亮度阈值；显示器用于利用调整后的待显示亮度控制对应的像素进行显示。
本发明的有益效果是：区别于现有技术的情况，本发明先获取每个像素在开机过程中所对应的待显示亮度，然后将每个像素的待显示亮度与预设的亮度阈值进行比较，若待显示亮度大于亮度阈值，则将待显示亮度调整成小于或等于亮度阈值，进而利用调整后的待显示亮度控制对应的像素进行显示，降低了开机画面亮度，进而减少开机时电压偏移过大造成面板残影的几率，降低由于局部电流过大造成面板器件老化过快的速度。
【附图说明】
图1是本发明有机发光面板的开机亮度控制方法一实施方式的流程示意图；
图2是本发明有机发光面板的开机亮度控制方法另一实施方式的流程示意图；
图3是本发明有机发光面板的开机亮度控制的其中一个模块构架示意图；
图4是本发明有机发光面板的开机亮度控制方法再一实施方式的流程示意图；
图5是本发明有机发光面板的开机亮度一调节示意图；
图6是本发明有机发光面板的开机亮度另一调节示意图；
图7是本发明有机发光面板一实施方式的结构示意图。
【具体实施方式】
请参阅图1，图1是本发明有机发光面板的开机亮度控制方法一实施方式的流程示意图。需注意的是，若有实质上相同的结果，本发明的方法并不以图1所示的流程顺序为限。其中，本发明有机发光面板包括多个像素。如图1所示， 该方法包括如下步骤：
S101：获取每个像素在开机过程中所对应的待显示亮度。
一般情况下，OLED面板在开机阈值时间内，各个像素不是同时亮起来的，而是一部分先亮起来，一部分后亮起来。若先亮起来的部分像素的待显示亮度过高，会出现OLED面板的局部区域亮度过高的现象，这就意味着OLED面板这个局部区域的电流过大，进而导致驱动TFT的电压偏移过大，这就会导致OLED面板的器件老化过快或烧毁，还会使得OLED面板出现残影现象。残影现象是指显示器上的残留的影像。也就是，当在显示器上进行画面切换时，前一个画面不会立刻消失，视觉效果与第二个画面同时出现，并且会慢慢消失。
因此，在本实施方式中，会对先亮起来的部分像素的待显示亮度进行控制，也即是控制这部分像素的电流值。
S102：将每个像素的待显示亮度与预设的亮度阈值进行比较。
其中，预设的亮度阈值是指OLED面板不出现残影的临界的亮度值。在开机阈值时间内，将每个像素的待显示亮度都与预设的亮度阈值进行比较。
S103：若待显示亮度大于亮度阈值，则将待显示亮度调整成小于或等于亮度阈值。
其中，将待显示亮度调整成小于或等于亮度阈值的其中一个具体的实施方式如下所示：
通过如下公式对待显示亮度进行调整：
Y’out＝Y’×K；
其中，K＝Yth/Y’max，Y’为调整之前的待显示亮度，Y’out为调整之后的待显示亮度，Yth为亮度阈值，Y’max为多个像素的待显示亮度中的最大亮度。
S104：利用调整后的待显示亮度控制对应的像素进行显示。
S105：若待显示亮度小于或等于亮度阈值，则直接利用待显示亮度控制对应的像素进行显示。
具体地，若是先亮起来的部分像素的待显示亮度若是小于或等于亮度阈值，则直接利用待显示亮度控制对应的像素进行显示，若是后亮起来的部分像素的待显示亮度大于亮度阈值，则将后亮起来的部分像素的待显示亮度调整成小于或等于亮度阈值。总之，在开机阈值时间内，每个像素的待显示亮度都要小于等于亮度阈值。
本实施方式中，先获取每个像素在开机过程中所对应的待显示亮度，然后 将每个像素的待显示亮度与预设的亮度阈值进行比较，若待显示亮度大于亮度阈值，则将待显示亮度调整成小于或等于亮度阈值，进而利用调整后的待显示亮度控制对应的像素进行显示，降低了开机画面亮度，进而减少开机时电压偏移过大造成面板残影的几率，降低由于局部电流过大造成面板器件老化过快的速度。
请参阅图2，图2是本发明有机发光面板的开机亮度控制方法另一实施方式的流程示意图。本实施方式中，该方法包括以下步骤：
S201：获取每个像素所对应的待显示灰阶值。
其中，由于从前端输出的是像素的灰阶值，因此需要首先获取每个像素所对应的待显示灰阶值，然后把每个像素所对应的待显示灰阶值计算为每个像素所对应的待显示亮度。具体地计算过程如下面的步骤所示。
S202：从每个像素所对应的不同基色的待显示灰阶值中提取最大待显示灰阶值。
其中，每个像素所对应的不同基色具体为红/绿/蓝(Red/Green/Blue，R/G/B)。也即是，提取R/G/B中具有最大的待显示灰阶值的基色。
S203：对最大待显示灰阶值进行伽马校正。
其中，伽马校正就是对图像的伽马曲线进行编辑，以对图像进行非线性色调编辑的方法，检出图像信号中的深色部分和浅色部分，并使两者比例增大，从而提高图像对比度效果。也即是，伽马校正的主要目的是提高待显示灰阶值的对比度。对最大待显示灰阶值进行伽马校正的具体过程如下所示：
通过如下公式对最大待显示灰阶值进行伽马校正：
Y’＝(Y/N)GMA×N；
其中，Y为伽马校正之前的最大待显示灰阶值，Y’为伽马校正之后的最大待显示灰阶值，GMA为有机发光面板的伽马系数，N为有机发光面板所容许的最大可显示灰阶值。
S204：将伽马校正后的最大待显示灰阶值作为像素所对应的待显示亮度。
S205：将每个像素的待显示亮度与预设的亮度阈值进行比较。
可如上S102所述，在此不作赘述。
S206：将每个像素的待显示亮度均调整为小于或等于预设的亮度阈值。
其中，若待显示亮度大于亮度阈值，则将待显示亮度调整成小于或等于亮度阈值。若待显示亮度小于或等于亮度阈值，则直接利用待显示亮度控制对应 的像素进行显示。
S207：利用调整后的待显示亮度对像素的待显示灰阶值进行调整。
S208：利用调整后的待显示灰阶值控制对应的像素进行显示。
在其中一个具体地应用场景中，如图3所示，图3是本发明有机发光面板的开机亮度控制的其中一个模块构架示意图。其中，模块31表示视频信号；模块32LVDS RX表示把LVDS格式的数据解包成RGB的数据格式；模块33亮度侦测控制表示侦测到输入面板的像素的待显示亮度大于预设亮度阈值时，降低画面的亮度值，当输入面板的像素的待显示亮度小于预设亮度阈值时，保持现有画面的亮度；模块34Gamma Transform表示是伽马白平衡的调节；模块35RGB 2RGBW表示把RGB格式的数据通过算法处理后转换为RGBW格式的数据；模块36Ext_comp表示负责收集的面板TFT和OLED参数，通过算法处理后进行画面均匀性的补偿；模块37TCON_Data map表示结合门驱动器(Gate Driver)和源驱动器(Source Driver)的时序，把RGB的数据输出给mLVDS；模块38TCON_ctrl表示结合Gate Driver和Source Driver的时序，参数满足其需要的控制讯号；模块39mLVDS表示把RGB格式的数据转换为mLVDS格式的数据。
其中，从模块31输入的视频信号是像素的待显示灰阶值。因此，在上面的实施方式中，需要把像素的待显示灰阶值进行处理，转换为待显示亮度之后，才与预设的亮度阈值进行比较。
其中，LVDS(Low-Voltage Differential Signaling，低电压差分信号)为一种信号传输模式，是一种电平标准。这种技术的核心是采用极低的电压摆幅高速差动传输数据，可以实现点对点或一点对多点的连接，具有低功耗、低误码率、低串扰和低辐射等特点，其传输介质可以是铜质的PCB连线，也可以是平衡电缆。LVDS技术用于简单的线路驱动器和接收器物理层器件以及比较复杂的接口通信芯片组。其中，LVDS与mLVDS的不同之处在于，输出的数据的排列方式不同。
其中，模块33亮度侦测控制也即是上述实施方式。
另外，模块38TCON_ctrl的输出信号传输给面板的扫描线，模块39mLVDS的输出信号传输给面板的数据线。
本实施方式中，先获取每个像素在开机过程中所对应的待显示亮度，然后 将每个像素的待显示亮度与预设的亮度阈值进行比较，若待显示亮度大于亮度阈值，则将待显示亮度调整成小于或等于亮度阈值，进而利用调整后的待显示亮度控制对应的像素进行显示，降低了开机画面亮度，进而减少开机时电压偏移过大造成面板残影的几率，降低由于局部电流过大造成面板器件老化过快的速度。
请参阅图4，图4是本发明有机发光面板的开机亮度控制方法再一实施方式的流程示意图。本实施方式中，该方法包括以下步骤：
S401：获取每个像素在开机过程中所对应的待显示亮度。
可如上S101所述，在此不作赘述。
S402：将每个像素的待显示亮度调整为不大于预设的亮度阈值。
具体地，将每个像素的待显示亮度与预设的亮度阈值进行比较。若待显示亮度大于亮度阈值，则将待显示亮度调整成小于或等于亮度阈值；若待显示亮度小于或等于亮度阈值，则直接利用待显示亮度控制对应的像素进行显示。
S403：利用调整后的待显示亮度控制对应的像素进行显示。
S404：随时间逐渐增大亮度阈值。
其中，在随时间逐渐增大亮度阈值之后，系统会返回步骤S401。
其中，开机阈值时间之后，待显示亮度会随之亮度阈值的增大而逐渐增大。具体地，根据预先设置的对应于不同时刻的亮度阈值通过插值方式计算当前时刻的亮度阈值。进一步地，在预定时刻后将亮度阈值设置成大于或等于有机发光面板所容许的最大可显示亮度。
在其中两个应用场景中，如图5和图6所述，图5和图6是本发明有机发光面板的开机亮度的两个调节示意图。其中，图5线性调节的，图6为非线性调节的。在图5和图6中，从t0时刻到t1时刻的时间段，为上述的开机阈值时间。从t1时刻开始到t8时刻的时间段，为逐渐增大亮度阈值，进而增大像素待显示亮度的过程。
本实施方式中，先获取每个像素在开机过程中所对应的待显示亮度，然后将每个像素的待显示亮度与预设的亮度阈值进行比较，若待显示亮度大于亮度阈值，则将待显示亮度调整成小于或等于亮度阈值，进而利用调整后的待显示亮度控制对应的像素进行显示，降低了开机画面亮度，进而减少开机时电压偏移过大造成面板残影的几率，降低由于局部电流过大造成面板器件老化过快的速度。
请参阅图7，图7是本发明有机发光面板一实施方式的结构示意图。该有机发光面板可以执行上述方法中有机发光面板执行的步骤。相关内容请参见上述方法中的详细说明，在此不再赘叙。
本实施方式中，该处理装置包括：处理器71、与处理器71耦合的存储器72、接收器73及显示器74。
存储器72用于存储操作系统、处理器71执行的指令以及接收到的消息等。
接收器73用于获取每个像素在开机过程中所对应的待显示亮度。
显示器74用于利用调整后的待显示亮度控制对应的像素进行显示。
处理器71用于将每个像素的待显示亮度与预设的亮度阈值进行比较；若待显示亮度大于亮度阈值，则将待显示亮度调整成小于或等于亮度阈值。
其中，处理器71还用于获取每个像素所对应的待显示灰阶值；根据待显示灰阶值计算每个像素所对应的待显示亮度。
其中，处理器71还用于从每个像素所对应的不同基色的待显示灰阶值中提取最大待显示灰阶值；对最大待显示灰阶值进行伽马校正；将伽马校正后的最大待显示灰阶值作为像素所对应的待显示亮度。
具体地，处理器71还用于通过如下公式对最大待显示灰阶值进行伽马校正：Y’＝(Y/N)GMA×N；其中，Y为伽马校正之前的最大待显示灰阶值，Y’为伽马校正之后的最大待显示灰阶值，GMA为有机发光面板的伽马系数，N为有机发光面板所容许的最大可显示灰阶值。
具体地，处理器71还用于通过如下公式对待显示亮度进行调整：Y’out＝Y’×K；其中，K＝Yth/Y’max，Y’为调整之前的待显示亮度，Y’out为调整之后的待显示亮度，Yth为亮度阈值，Y’max为多个像素的待显示亮度中的最大亮度。
具体地，处理器71还用于利用调整后的待显示亮度对像素的待显示灰阶值进行调整；利用调整后的待显示灰阶值控制对应的像素进行显示。
其中，处理器71还用于随时间逐渐增大亮度阈值。
具体地，处理器71还用于根据预先设置的对应于不同时刻的亮度阈值通过插值方式计算当前时刻的亮度阈值。
具体地，处理器71还用于在预定时刻后将亮度阈值设置成大于或等于有机发光面板所容许的最大可显示亮度。
本实施方式中，先获取每个像素在开机过程中所对应的待显示亮度，然后将每个像素的待显示亮度与预设的亮度阈值进行比较，若待显示亮度大于亮度 阈值，则将待显示亮度调整成小于或等于亮度阈值，进而利用调整后的待显示亮度控制对应的像素进行显示，降低了开机画面亮度，进而减少开机时电压偏移过大造成面板残影的几率，降低由于局部电流过大造成面板器件老化过快的速度。
以上所述仅为本发明的实施方式，并非因此限制本发明的专利范围，凡是利用本发明说明书及附图内容所作的等效结构或等效流程变换，或直接或间接运用在其他相关的技术领域，均同理包括在本发明的专利保护范围内。

Claims (20)

  1. 一种有机发光面板的开机亮度控制方法，所述有机发光面板包括多个像素，其中，所述方法包括：
    获取每个所述像素在开机过程中所对应的待显示亮度；
    将每个所述像素的待显示亮度与预设的亮度阈值进行比较；
    若所述待显示亮度大于所述亮度阈值，则将所述待显示亮度调整成小于或等于所述亮度阈值；
    利用调整后的所述待显示亮度对所述像素的待显示灰阶值进行调整；
    利用调整后的所述待显示灰阶值控制对应的所述像素进行显示；
    随时间逐渐增大所述亮度阈值，并返回所述获取每个所述像素在开机过程中所对应的待显示亮度。
  2. 根据权利要求1所述的方法，其中，所述方法进一步包括：若所述待显示亮度小于或等于所述亮度阈值，则直接利用所述待显示亮度控制对应的所述像素进行显示。
  3. 根据权利要求1所述的方法，其特征在于，所述获取每个所述像素在开机过程中所对应的待显示亮度的步骤包括：
    获取每个所述像素所对应的待显示灰阶值；
    根据所述待显示灰阶值计算每个所述像素所对应的待显示亮度。
  4. 根据权利要求3所述的方法，其特征在于，所述根据所述待显示灰阶值计算每个所述像素所对应的待显示亮度的步骤包括：
    从每个所述像素所对应的不同基色的待显示灰阶值中提取最大待显示灰阶值；
    对所述最大待显示灰阶值进行伽马校正；
    将伽马校正后的所述最大待显示灰阶值作为所述像素所对应的待显示亮度。
  5. 根据权利要求1所述的方法，其中，所述对所述最大待显示灰阶值进行伽马校正的步骤包括：
    通过如下公式对所述最大待显示灰阶值进行伽马校正：
    Y’＝(Y/N)GMA×N；
    其中，Y为伽马校正之前的所述最大待显示灰阶值，Y’为伽马校正之后的所述最大待显示灰阶值，GMA为所述有机发光面板的伽马系数，所述N为所述有机发光面板所容许的最大可显示灰阶值。
  6. 根据权利要求1所述的方法，其中，所述待显示亮度调整成小于或等于所述亮度阈值的步骤包括：
    通过如下公式对所述待显示亮度进行调整：
    Y’out＝Y’×K；
    其中，K＝Yth/Y’max，Y’为调整之前的所述待显示亮度，Y’out为调整之后的所述待显示亮度，Yth为所述亮度阈值，Y’max为所述多个像素的待显示亮度中的最大亮度。
  7. 根据权利要求1所述的方法，其中，所述随时间逐渐增大所述亮度阈值的步骤包括：
    根据预先设置的对应于不同时刻的所述亮度阈值通过插值方式计算当前时刻的所述亮度阈值。
  8. 根据权利要求1所述的方法，其中，所述随时间逐渐增大所述亮度阈值的步骤包括：
    在预定时刻后将所述亮度阈值设置成大于或等于所述有机发光面板所容许的最大可显示亮度。
  9. 一种有机发光面板的开机亮度控制方法，所述有机发光面板包括多个像素，其中，所述方法包括：
    获取每个所述像素在开机过程中所对应的待显示亮度；
    将每个所述像素的待显示亮度与预设的亮度阈值进行比较；
    若所述待显示亮度大于所述亮度阈值，则将所述待显示亮度调整成小于或等于所述亮度阈值；
    利用调整后的所述待显示亮度控制对应的所述像素进行显示。
  10. 根据权利要求9所述的方法，其中，所述方法进一步包括：若所述待显示亮度小于或等于所述亮度阈值，则直接利用所述待显示亮度控制对应的所述像素进行显示。
  11. 根据权利要求9所述的方法，其中，所述获取每个所述像素在开机过程中所对应的待显示亮度的步骤包括：
    获取每个所述像素所对应的待显示灰阶值；
    根据所述待显示灰阶值计算每个所述像素所对应的待显示亮度。
  12. 根据权利要求11所述的方法，其中，所述根据所述待显示灰阶值计算每个所述像素所对应的待显示亮度的步骤包括：
    从每个所述像素所对应的不同基色的待显示灰阶值中提取最大待显示灰阶值；
    对所述最大待显示灰阶值进行伽马校正；
    将伽马校正后的所述最大待显示灰阶值作为所述像素所对应的待显示亮度。
  13. 根据权利要求12所述的方法，其中，所述对所述最大待显示灰阶值进行伽马校正的步骤包括：
    通过如下公式对所述最大待显示灰阶值进行伽马校正：
    Y’＝(Y/N)GMA×N；
    其中，Y为伽马校正之前的所述最大待显示灰阶值，Y’为伽马校正之后的所述最大待显示灰阶值，GMA为所述有机发光面板的伽马系数，所述N为所述有机发光面板所容许的最大可显示灰阶值。
  14. 根据权利要求9所述的方法，其中，所述待显示亮度调整成小于或等于所述亮度阈值的步骤包括：
    通过如下公式对所述待显示亮度进行调整：
    Y’out＝Y’×K；
    其中，K＝Yth/Y’max，Y’为调整之前的所述待显示亮度，Y’out为调整之后的所述待显示亮度，Yth为所述亮度阈值，Y’max为所述多个像素的待显示亮度中的最大亮度。
  15. 根据权利要求9所述的方法，其中，所述利用调整后的所述待显示亮度控制对应的所述像素进行显示的步骤包括：
    利用调整后的所述待显示亮度对所述像素的待显示灰阶值进行调整；
    利用调整后的所述待显示灰阶值控制对应的所述像素进行显示。
  16. 根据权利要求9所述的方法，其中，所述利用调整后的所述待显示亮度控制对应的所述像素进行显示的步骤之后还包括：
    随时间逐渐增大所述亮度阈值，并返回所述获取每个所述像素在开机过程中所对应的待显示亮度的步骤。
  17. 根据权利要求16所述的方法，其中，所述随时间逐渐增大所述亮度阈值 的步骤包括：
    根据预先设置的对应于不同时刻的所述亮度阈值通过插值方式计算当前时刻的所述亮度阈值。
  18. 根据权利要求16所述的方法，其中，所述随时间逐渐增大所述亮度阈值的步骤包括：
    在预定时刻后将所述亮度阈值设置成大于或等于所述有机发光面板所容许的最大可显示亮度。
  19. 一种有机发光面板，其中，所述面板包括：处理器、存储器、接收器及显示器，所述处理器连接所述接收器及所述显示器；
    所述接收器用于获取每个所述像素在开机过程中所对应的待显示亮度；
    所述处理器用于将每个所述像素的待显示亮度与预设的亮度阈值进行比较；若所述待显示亮度大于所述亮度阈值，则将所述待显示亮度调整成小于或等于所述亮度阈值；
    所述显示器用于利用调整后的所述待显示亮度控制对应的所述像素进行显示。
  20. 根据权利要求19所述的有机发光面板，其中，若所述待显示亮度小于或等于所述亮度阈值，则所述处理器还用于直接利用所述待显示亮度控制对应的所述像素进行显示。
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