WO2018201559A1 - 显示装置的视频信号调节器及视频信号调节方法 - Google Patents

显示装置的视频信号调节器及视频信号调节方法 Download PDF

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Publication number
WO2018201559A1
WO2018201559A1 PCT/CN2017/088184 CN2017088184W WO2018201559A1 WO 2018201559 A1 WO2018201559 A1 WO 2018201559A1 CN 2017088184 W CN2017088184 W CN 2017088184W WO 2018201559 A1 WO2018201559 A1 WO 2018201559A1
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Prior art keywords
video signal
frame image
adjustment parameter
pixels
mth frame
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PCT/CN2017/088184
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English (en)
French (fr)
Inventor
黄泰钧
曾玉超
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Shenzhen China Star Optoelectronics Semiconductor Display Technology Co Ltd
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Shenzhen China Star Optoelectronics Semiconductor Display Technology Co Ltd
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Priority to US15/573,143 priority Critical patent/US10360842B2/en
Publication of WO2018201559A1 publication Critical patent/WO2018201559A1/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
    • G09G3/2092—Details of a display terminals using a flat panel, the details relating to the control arrangement of the display terminal and to the interfaces thereto
    • G09G3/2096—Details of the interface to the display terminal specific for a flat panel
    • 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
    • G09G2320/029—Improving the quality of display appearance by monitoring one or more pixels in the display panel, e.g. by monitoring a fixed reference pixel
    • G09G2320/0295—Improving the quality of display appearance by monitoring one or more pixels in the display panel, e.g. by monitoring a fixed reference pixel by monitoring each display pixel
    • 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
    • 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
    • G09G2320/0626—Adjustment of display parameters for control of overall brightness
    • G09G2320/0646—Modulation of illumination source brightness and image signal correlated to each other
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2360/00—Aspects of the architecture of display systems
    • G09G2360/16—Calculation or use of calculated indices related to luminance levels in display data

Definitions

  • the invention belongs to the technical field of signal processing, and in particular to a video signal regulator and a video signal adjusting method of a display device.
  • An AMOLED (Active Matrix Organic Light Emitting Diode) display device is widely used because of its wider viewing angle, higher refresh rate, and thinner thickness.
  • aging of a thin film transistor (TFT) device and an organic light emitting diode (OLED) device is positively correlated with a driving current, and a power driving capability is also positively correlated with a driving current, and thus a driving current is larger, a thin film transistor
  • TFT thin film transistor
  • OLED organic light emitting diode
  • a video signal conditioner for a display device includes: a signal receiving module for receiving an externally input video signal; and a brightness conversion module for converting an externally input video signal into brightness
  • the average brightness acquisition module is configured to obtain an average brightness of the pixels of the Nth row when displaying the image of the Mth frame; and a brightness adjustment parameter calculation module, configured to display the Mth of the pixels according to the average brightness of the Nth row of pixels when displaying the image of the Mth frame.
  • the video signal corresponding to the pixel is adjusted to the externally input video signal corresponding to the Nth line pixel when the Mth frame image is displayed, to output the adjusted Nth line when the Mth frame image is displayed.
  • the brightness adjustment parameter calculation module is further configured to use, according to the following formula 1, the average brightness of the Nth row of pixels when displaying the Mth frame image, and the average brightness of the Nth row of pixels when displaying the M-1th frame image. And the brightness adjustment parameter of the pixel of the N-1th line when the image of the Mth frame is displayed, and the brightness adjustment parameter of the pixel of the Nth line when the image of the Mth frame is displayed is calculated,
  • AL N represents the average luminance of the Nth row of pixels when the Mth frame image is displayed
  • AL' N represents the average luminance of the Nth row of pixels when the M-1th frame image is displayed
  • CL N-1 represents when the Mth frame of the image is displayed.
  • CL N represents the brightness adjustment parameter of the pixel of the Nth line when the image of the Mth frame is displayed.
  • the video signal adjustment parameter acquiring module is further configured to use, according to the following formula 2, the brightness adjustment parameter, the first preset brightness adjustment parameter, and the second preset brightness of the Nth line pixel when displaying the Mth frame image. Adjusting the parameter to obtain the video signal adjustment parameter of the pixel of the Nth line when displaying the image of the Mth frame,
  • CL N represents a brightness adjustment parameter of the Nth row of pixels when displaying the Mth frame image
  • CL th1 represents the first preset brightness adjustment parameter
  • CL th2 represents the second preset brightness adjustment parameter
  • r N represents a display
  • the video signal adjustment parameters of the Nth line pixel at the Mth frame image, r 1 and r 2 respectively represent two different fixed values.
  • the output module is further configured to use the following formula 3 to adjust a video corresponding to the Nth row of pixels when displaying the Mth frame image according to the video signal adjustment parameter of the Nth row of pixels when displaying the Mth frame image; Signal adjustment,
  • D outN represents a video signal corresponding to the Nth row of pixels when the Mth frame image is displayed after adjustment
  • D inN represents a video signal corresponding to the Nth row of pixels when the Mth frame image is externally input
  • r N indicates that the Mth is displayed.
  • the brightness conversion module is further configured to convert the externally input video signal into an HSV color space, thereby converting the externally input video signal into brightness.
  • a video signal adjustment method of a display device comprising: receiving an externally input video signal; converting an externally input video signal into luminance; and acquiring Nth when displaying the Mth frame image
  • the brightness adjustment parameter calculates a brightness adjustment parameter of the Nth line pixel when displaying the Mth frame image; the brightness adjustment parameter of the Nth line pixel according to the display of the Mth frame image, the first preset brightness adjustment parameter, and the second preset brightness adjustment
  • the parameter calculates a video signal adjustment parameter of the Nth line pixel when displaying the Mth frame image; according to the video signal adjustment parameter of the Nth line pixel when displaying the Mth frame image, the Nth line pixel corresponding to the external
  • the following formula 1 is used according to the average brightness of the Nth row of pixels when displaying the Mth frame image, and the Nth row of pixels when the M-1th frame image is displayed.
  • the average brightness and the brightness adjustment parameter of the N-1th line pixel when displaying the Mth frame image calculate the brightness adjustment parameter of the Nth line pixel when displaying the Mth frame image,
  • AL N represents the average luminance of the Nth row of pixels when the Mth frame image is displayed
  • AL' N represents the average luminance of the Nth row of pixels when the M-1th frame image is displayed
  • CL N-1 represents when the Mth frame of the image is displayed.
  • CL N represents the brightness adjustment parameter of the pixel of the Nth line when the image of the Mth frame is displayed.
  • the first preset brightness adjustment parameter and the first The second preset brightness adjustment parameter acquires a video signal adjustment parameter of the Nth line pixel when displaying the Mth frame image
  • CL N represents a brightness adjustment parameter of the Nth row of pixels when displaying the Mth frame image
  • CL th1 represents the first preset brightness adjustment parameter
  • CL th2 represents the second preset brightness adjustment parameter
  • r N represents a display
  • r 1 and r 2 respectively represent two different fixed values
  • r 1 is greater than r 2 .
  • the following method 3 is used to adjust the parameter according to the video signal of the Nth row of pixels when the Mth frame image is displayed, and the Nth frame image is displayed when the external input is displayed.
  • the video signal corresponding to the line pixel is adjusted,
  • D outN represents a video signal corresponding to the Nth row of pixels when the Mth frame image is displayed after adjustment
  • D inN represents a video signal corresponding to the Nth row of pixels when the Mth frame image is externally input
  • r N indicates that the Mth is displayed.
  • the externally input video signal is converted to the HSV color space, thereby converting the externally input video signal into luminance.
  • the video signal is adjusted by controlling the brightness of the pixel to be displayed, thereby enabling control of the brightness of the display device, thereby enabling control of the aging speed and the use cost of the display device.
  • the present invention controls the brightness to be displayed by the pixels in units of rows, in the adjustment process, it is only necessary to dynamically temporarily store the data of each row of pixels, which can greatly save storage space.
  • FIG. 1 is a block diagram of a display device in accordance with an embodiment of the present invention.
  • FIG. 2 is a block diagram of a video signal conditioner in accordance with an embodiment of the present invention.
  • FIG. 3 is a flow chart of a video signal adjustment method in accordance with an embodiment of the present invention.
  • FIG. 1 is a block diagram of a display device in accordance with an embodiment of the present invention.
  • a display device includes a display panel 10, a gate driver 20, a data driver 30, a signal controller 40, and a video signal conditioner 50.
  • the display panel 10 includes a plurality of gate lines (not shown) extending in the row direction and a plurality of data lines (not shown) extending in the column direction.
  • the gate line is connected to the gate driver 20, and the data line is connected to the data driver 30.
  • Signal controller 40 controls the operation of gate driver 20 and data driver 30.
  • the video signal conditioner 50 receives an input video signal, such as R, G, B data, from an external graphics controller (not shown) and adjusts the input video signal to output the adjusted video data, such as R' , G', B' data.
  • the signal controller 40 receives the adjusted video signal from the video signal conditioner 50 and receives a plurality of input control signals for controlling the display of the adjusted video signal from an external graphics controller.
  • the signal controller 40 appropriately processes the adjusted video signal in accordance with the input control signal, thereby generating image data in accordance with the operating conditions of the display panel 10. Then, the signal controller 40 generates a gate control signal and a data control signal, transmits the gate control signal to the gate driver 20, and transmits the data control signal and image data to the data driver 30.
  • the display panel 10 further includes pixels (not shown) disposed in a region defined by the scan lines and the data lines, wherein each of the pixels includes an organic light emitting diode.
  • the gate driver 20 and the data driver 30 are disposed around the display panel 10.
  • the pixels on the display panel 10 display an image based on the analog type data signal supplied from the data driver 30 and the gate signal supplied from the gate driver 20.
  • the analog type data signal supplied from the data driver 30 is formed based on the image data.
  • the video signal conditioner 50 according to an embodiment of the present invention will be described in detail below.
  • FIG. 2 is a block diagram of a video signal conditioner in accordance with an embodiment of the present invention.
  • a video signal adjuster 50 includes: a signal receiving module 51, a brightness converting module 52, an average brightness acquiring module 53, a brightness adjusting parameter calculating module 54, a video signal adjusting parameter calculating module 55, and an output. Module 56.
  • the signal receiving module 51 is configured to receive an input video signal, such as R, G, B data, from an external graphics controller.
  • a memory module (not shown) may be configured to store the input video signal.
  • the input video signal is a video signal supplied to all pixels.
  • the brightness conversion module 52 is configured to convert the input video signal into brightness. Further, the brightness conversion module 52 can convert the input video signal to the HSV color space by using Equation 1 below, thereby converting the input video signal into brightness.
  • max represents the maximum value of r
  • g, b h
  • s represents the saturation of the HSV color space
  • v represents the brightness of the HSV color space.
  • r represents the input R data
  • g represents the input G data
  • b represents the input B data.
  • the average brightness obtaining module 53 is configured to obtain an average brightness of the Nth row of pixels when displaying the Mth frame image, where M and N are both positive integers.
  • the average brightness acquisition module 53 may first acquire the brightness of each pixel of the Nth row of pixels when displaying the Mth frame image, and then add the acquired brightness of all the pixels and divide by the number of pixels of the Nth row of pixels to obtain a display. The average brightness of the Nth row of pixels at the Mth frame image.
  • the brightness adjustment parameter calculation module 54 is configured to display, according to the average brightness of the Nth row of pixels when displaying the Mth frame image, the average brightness of the Nth row of pixels when displaying the M-1th frame image (previously stored in the storage module), and display
  • the brightness adjustment parameter of the pixel of the N-1th line in the M frame image calculates the brightness adjustment parameter of the pixel of the Nth line when the image of the Mth frame is displayed. Further, the brightness adjustment parameter calculation module 54 calculates the brightness adjustment parameter of the Nth line pixel when the Mth frame image is displayed, using Equation 2 below.
  • AL N represents the average luminance of the Nth row of pixels when the Mth frame image is displayed
  • AL' N represents the average luminance of the Nth row of pixels when the M-1th frame image is displayed
  • CL N-1 represents when the Mth frame of the image is displayed.
  • CL N represents the brightness adjustment parameter of the pixel of the Nth line when the image of the Mth frame is displayed.
  • the video signal adjustment parameter calculation module 55 is configured to calculate the Nth when displaying the Mth frame image according to the brightness adjustment parameter of the Nth row of pixels when displaying the Mth frame image, the first preset brightness adjustment parameter, and the second preset brightness adjustment parameter. Line pixel video signal adjustment parameters. Further, the video signal adjustment parameter calculation module 55 calculates the video signal adjustment parameter of the Nth line pixel when displaying the Mth frame image by using Equation 3 below.
  • CL N represents a brightness adjustment parameter of the Nth row of pixels when displaying the Mth frame image
  • CL th1 represents the first preset brightness adjustment parameter
  • CL th2 represents the second preset brightness adjustment parameter
  • r N represents a display
  • r 1 and r 2 respectively represent two different fixed values
  • r 1 is greater than r 2 .
  • the output module 56 is configured to adjust, according to the video signal adjustment parameter of the Nth row of pixels when displaying the Mth frame image, the video signal corresponding to the Nth row of pixels when the Mth frame image is externally input, The adjusted video signal corresponding to the Nth row of pixels when the Mth frame image is displayed. Further, the output module 56 adjusts the externally input video signal corresponding to the Nth row of pixels when the Mth frame image is displayed by using the following formula 4.
  • D outN represents a video signal corresponding to the Nth row of pixels when the Mth frame image is displayed after adjustment
  • D inN represents a video signal corresponding to the Nth row of pixels when the Mth frame image is externally input
  • r N indicates that the Mth is displayed.
  • D inN includes R data, G data, and B data corresponding to the Nth row of pixels when the Mth frame image is externally input
  • D outN includes R' data, G' data, and B' data corresponding to the Nth row of pixels when the Mth frame image is displayed.
  • the video signal of each line of pixels can be adjusted according to the brightness of each line of pixels, thereby adjusting the input video signals, such as R data, G data and B data, to the adjusted video data, such as R' data, G 'Data and B' data.
  • the video signal can be adjusted by controlling the brightness of the pixel to be displayed, so that the brightness of the display device can be controlled, and the aging speed and the use cost of the display device can be controlled.
  • the embodiment controls the brightness to be displayed by the pixel in units of rows, in the adjustment process, it is only necessary to dynamically temporarily store the data of each row of pixels, which can greatly save storage space.
  • FIG. 3 is a flow chart of a video signal adjustment method in accordance with an embodiment of the present invention.
  • a video signal adjustment method includes the steps of:
  • the input video signal such as R, G, B data
  • the signal receiving module 51 receives the input video signal from the external graphics controller by the signal receiving module 51.
  • a memory module (not shown) may be configured to store the input video signal.
  • the input video signal includes a video signal that is supplied to all of the pixels.
  • S320 Convert the input video signal into brightness by using the brightness conversion module 52.
  • the brightness conversion module 52 can convert the input video signal to the HSV color space by using the above formula 1, thereby converting the input video signal into brightness.
  • S330 Acquire an average brightness of the Nth row of pixels when displaying the Mth frame image by using the average brightness acquiring module 53, wherein M and N are both positive integers, and 1 ⁇ N ⁇ n.
  • the average brightness acquisition module 53 may first acquire the brightness of each pixel of the Nth line pixel when displaying the Mth frame image, and then all the acquired The luminances of the pixels are added and divided by the number of pixels of the Nth row of pixels, thereby obtaining the average luminance of the pixels of the Nth row when the Mth frame image is displayed.
  • S340 using the brightness adjustment parameter calculation module 54 according to the average brightness of the Nth row of pixels when displaying the Mth frame image, the average brightness of the Nth row of pixels when displaying the M-1th frame image (previously stored in the storage module), and displaying
  • the brightness adjustment parameter of the N-1th line pixel (previously stored in the storage module) at the Mth frame image calculates the brightness adjustment parameter of the Nth line pixel when the Mth frame image is displayed.
  • step S340 the brightness adjustment parameter calculation module 54 calculates the brightness adjustment parameter of the Nth line pixel when the Mth frame image is displayed, using the above formula 2.
  • the video signal adjustment parameter calculation module 55 calculates, according to the brightness adjustment parameter of the Nth line pixel when displaying the Mth frame image, the first preset brightness adjustment parameter, and the second preset brightness adjustment parameter, when the image of the Mth frame is displayed. Video signal adjustment parameters for N lines of pixels.
  • step S350 the video signal adjustment parameter calculation module 55 calculates the video signal adjustment parameter of the Nth line pixel when the Mth frame image is displayed, using the above formula 3.
  • S360 using the output module 56 to adjust the video signal corresponding to the Nth row of pixels when displaying the Mth frame image according to the video signal adjustment parameter of the Nth row of pixels when displaying the Mth frame image, to output the adjusted display.
  • step S360 the output module 56 adjusts the externally input video signal corresponding to the Nth row of pixels when the Mth frame image is displayed, using the above formula 4.
  • the video signal of each line of pixels can be adjusted according to the brightness of each line of pixels, thereby adjusting the input video signals, such as R data, G data and B data, to the adjusted video data, such as R' data, G 'Data and B' data.
  • each flow and/or block of flowcharts and/or block diagrams, and combinations of flow and/or blocks in the flowcharts and/or block diagrams can be implemented by computer program instructions in conjunction with information sensing devices.
  • These computer program instructions can be provided to a general purpose computer, a special purpose computer, an embedded processor or other A processor of the programmable data processing device to generate a machine such that instructions executed by a processor of a computer or other programmable data processing device cooperate with the information sensing device to generate a process or processes and/or block diagrams for implementing the flowchart A device in a box or a function specified in a plurality of boxes.
  • each device or module in the display device may be implemented as a hardware component.
  • One skilled in the art can implement various devices or modules using, for example, a field programmable gate array (FPGA) or an application specific integrated circuit (ASIC), depending on the processing performed by the various devices or modules defined.
  • FPGA field programmable gate array
  • ASIC application specific integrated circuit

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Abstract

本发明提供了一种显示装置的视频信号调节器，其包括：信号接收模块，用于接收外部输入的视频信号；亮度转换模块，用于将外部输入的视频信号转换为亮度；平均亮度获取模块，用于获取显示第M帧图像时第N行像素的平均亮度；亮度调节参数计算模块，用于计算出显示第M帧图像时第N行像素的亮度调节参数；视频信号调节参数计算模块，用于计算出显示第M帧图像时第N行像素的视频信号调节参数；输出模块，用于输出调节后的显示第M帧图像时第N行像素对应的视频信号。本发明还提供了一种显示装置的视频信号调节方法。本发明通过控制像素将要显示的亮度来对视频信号进行调节，从而能够控制显示装置的亮度，进而能够控制显示装置的老化速度和使用成本。

Description

显示装置的视频信号调节器及视频信号调节方法 技术领域
本发明属于信号处理技术领域，具体地讲，涉及一种显示装置的视频信号调节器及视频信号调节方法。
背景技术
AMOLED(Active Matrix Organic Light Emitting Diode，有源矩阵有机发光二极管)显示装置因其具有更宽的视角、更高的刷新率和更薄的厚度，所以被广泛的采用。
在AMOLED显示装置中，薄膜晶体管(TFT)器件和有机发光二极管(OLED)器件的老化与驱动电流正相关，并且电能(Power)驱动能力也与驱动电流正相关，因此驱动电流越大，薄膜晶体管(TFT)器件和有机发光二极管(OLED)器件的老化速度越快，并且电能(Power)成本也越高。这样，会加速缩短AMOLED显示装置的使用寿命，并且也会增加AMOLED显示装置的使用成本。
发明内容
为了解决上述现有技术存在的问题，本发明的目的在于提供一种可以控制OLED老化速度和使用成本的显示装置的视频信号调节器及视频信号调节方法。
根据本发明的一方面，提供了一种显示装置的视频信号调节器，其包括：信号接收模块，用于接收外部输入的视频信号；亮度转换模块，用于将外部输入的视频信号转换为亮度；平均亮度获取模块，用于获取显示第M帧图像时第N行像素的平均亮度；亮度调节参数计算模块，用于根据显示第M帧图像时第N行像素的平均亮度、显示第M-1帧图像时第N行像素的平均亮度以及显示第M帧图像时第N-1行像素的亮度调节参数计算出显示第M帧图像时第N行像素的亮度调节参数；视频信号调节参数计算模块，用于根据显示第M帧 图像时第N行像素的亮度调节参数、第一预设亮度调节参数和第二预设亮度调节参数计算出显示第M帧图像时第N行像素的视频信号调节参数；输出模块，用于根据显示第M帧图像时第N行像素的视频信号调节参数对外部输入的显示第M帧图像时第N行像素对应的视频信号进行调节，以输出调节后的显示第M帧图像时第N行像素对应的视频信号。
可选地，所述亮度调节参数计算模块进一步用于利用下面的式子1根据显示第M帧图像时第N行像素的平均亮度、显示第M-1帧图像时第N行像素的平均亮度以及显示第M帧图像时第N-1行像素的亮度调节参数计算出显示第M帧图像时第N行像素的亮度调节参数，
[式子1]CLN＝CLN-1+(ALN-AL'N)/N
其中，ALN表示显示第M帧图像时第N行像素的平均亮度，AL'N表示显示第M-1帧图像时第N行像素的平均亮度，CLN-1表示显示第M帧图像时第N-1行像素的亮度调节参数，CLN表示显示第M帧图像时第N行像素的亮度调节参数。
可选地，所述视频信号调节参数获取模块进一步用于利用下面的式子2根据显示第M帧图像时第N行像素的亮度调节参数、第一预设亮度调节参数和第二预设亮度调节参数获取显示第M帧图像时第N行像素的视频信号调节参数，
Figure PCTCN2017088184-appb-000001
其中，CLN表示显示第M帧图像时第N行像素的亮度调节参数，CLth1表示所述第一预设亮度调节参数，CLth2表示所述第二预设亮度调节参数，rN表示显示第M帧图像时第N行像素的视频信号调节参数，r1和r2分别表示两个不同的固定值。
可选地，所述输出模块进一步用于利用下面的式子3根据显示第M帧图像时第N行像素的视频信号调节参数对外部输入的显示第M帧图像时第N行像素对应的视频信号进行调节，
[式子3]DoutN＝DinN*rN
其中，DoutN表示调节后的显示第M帧图像时第N行像素对应的视频信号，DinN表示外部输入的显示第M帧图像时第N行像素对应的视频信号，rN表示显示第M帧图像时第N行像素的视频信号调节参数。
可选地，所述亮度转换模块进一步用于将外部输入的视频信号转换到HSV颜色空间，从而将外部输入的视频信号转换为亮度。
根据本发明的另一方面，还提供了一种显示装置的视频信号调节方法，其包括：接收外部输入的视频信号；将外部输入的视频信号转换为亮度；获取显示第M帧图像时第N行像素的平均亮度；根据显示第M帧图像时第N行像素的平均亮度、显示第M-1帧图像时第N行像素的平均亮度以及显示第M帧图像时第N-1行像素的亮度调节参数计算出显示第M帧图像时第N行像素的亮度调节参数；根据显示第M帧图像时第N行像素的亮度调节参数、第一预设亮度调节参数和第二预设亮度调节参数计算出显示第M帧图像时第N行像素的视频信号调节参数；根据显示第M帧图像时第N行像素的视频信号调节参数对外部输入的显示第M帧图像时第N行像素对应的视频信号进行调节，以输出调节后的显示第M帧图像时第N行像素对应的视频信号。
可选地，在所述显示装置的视频信号调节方法中，利用下面的式子1根据显示第M帧图像时第N行像素的平均亮度、显示第M-1帧图像时第N行像素的平均亮度以及显示第M帧图像时第N-1行像素的亮度调节参数计算出显示第M帧图像时第N行像素的亮度调节参数，
[式子1]CLN＝CLN-1+(ALN-AL'N)/N
其中，ALN表示显示第M帧图像时第N行像素的平均亮度，AL'N表示显示第M-1帧图像时第N行像素的平均亮度，CLN-1表示显示第M帧图像时第N-1行像素的亮度调节参数，CLN表示显示第M帧图像时第N行像素的亮度调节参数。
可选地，在所述显示装置的视频信号调节方法中，利用下面的式子2根据显示第M帧图像时第N行像素的亮度调节参数、第一预设亮度调节参数和第 二预设亮度调节参数获取显示第M帧图像时第N行像素的视频信号调节参数，
Figure PCTCN2017088184-appb-000002
其中，CLN表示显示第M帧图像时第N行像素的亮度调节参数，CLth1表示所述第一预设亮度调节参数，CLth2表示所述第二预设亮度调节参数，rN表示显示第M帧图像时第N行像素的视频信号调节参数，r1和r2分别表示两个不同的固定值，且r1大于r2。
可选地，在所述显示装置的视频信号调节方法中，利用下面的式子3根据显示第M帧图像时第N行像素的视频信号调节参数对外部输入的显示第M帧图像时第N行像素对应的视频信号进行调节，
[式子3]DoutN＝DinN*rN
其中，DoutN表示调节后的显示第M帧图像时第N行像素对应的视频信号，DinN表示外部输入的显示第M帧图像时第N行像素对应的视频信号，rN表示显示第M帧图像时第N行像素的视频信号调节参数。
可选地，在所述显示装置的视频信号调节方法中，将外部输入的视频信号转换到HSV颜色空间，从而将外部输入的视频信号转换为亮度。
本发明的有益效果：本发明通过控制像素将要显示的亮度来对视频信号进行调节，从而能够控制显示装置的亮度，进而能够控制显示装置的老化速度和使用成本。此外，由于本发明是以行为单位来控制像素将要显示的亮度，因此在调节过程中，仅需动态地暂存每行像素的数据即可，能够大大节省存储空间。
附图说明
通过结合附图进行的以下描述，本发明的实施例的上述和其它方面、特点和优点将变得更加清楚，附图中：
图1是根据本发明的实施例的显示装置的框图；
图2是根据本发明的实施例的视频信号调节器的模块图；
图3是根据本发明的实施例的视频信号调节方法的流程图。
具体实施方式
以下，将参照附图来详细描述本发明的实施例。然而，可以以许多不同的形式来实施本发明，并且本发明不应该被解释为限制于这里阐述的具体实施例。相反，提供这些实施例是为了解释本发明的原理及其实际应用，从而使本领域的其他技术人员能够理解本发明的各种实施例和适合于特定预期应用的各种修改。
图1是根据本发明的实施例的显示装置的框图。
参照图1，根据本发明的实施例的显示装置包括：显示面板10、栅极驱动器20、数据驱动器30、信号控制器40和视频信号调节器50。
显示面板10包括：沿行方向延伸的若干栅极线(未示出)以及沿列方向延伸的若干数据线(未示出)。栅极线连接至栅极驱动器20，数据线连接至数据驱动器30。信号控制器40控制栅极驱动器20和数据驱动器30的操作。
视频信号调节器50从外部图形控制器(未示出)接收输入的视频信号，诸如R、G、B数据，并对输入的视频信号进行调节，以输出被调节后的视频数据，诸如R’、G’、B’数据。信号控制器40从视频信号调节器50接收被调节后的视频信号以及从外部图形控制器接收用于控制调节后的视频信号的显示的多个输入控制信号。信号控制器40根据输入控制信号适当处理调节后的视频信号，从而产生符合显示面板10的操作条件的图像数据。然后，信号控制器40产生栅极控制信号和数据控制信号，将栅极控制信号传送到栅极驱动器20，并将数据控制信号和图像数据传送到数据驱动器30。
显示面板10还包括设置在由扫描线和数据线限定出的区域中的像素(未示出)，其中，每个像素包括有机发光二极管。
栅极驱动器20和数据驱动器30设置在显示面板10的周围。显示面板10上的像素根据数据驱动器30提供的模拟类型数据信号和栅极驱动器20提供的栅极信号来显示影像。数据驱动器30提供的模拟类型数据信号是根据图像数据形成的。
以下将对根据本发明的实施例的视频信号调节器50进行详细的描述说明。
图2是根据本发明的实施例的视频信号调节器的模块图。
参照图2，根据本发明的实施例的视频信号调节器50包括：信号接收模块51、亮度转换模块52、平均亮度获取模块53、亮度调节参数计算模块54、视频信号调节参数计算模块55、输出模块56。
信号接收模块51用于从外部图形控制器接收输入的视频信号，诸如R、G、B数据。这里，可以配置一存储模块(未示出)来对输入的视频信号进行存储。此外，输入的视频信号为提供给所有像素的视频信号。
亮度转换模块52用于将输入的视频信号转换为亮度。进一步地，亮度转换模块52可利用下面的式子1将输入的视频信号转换到HSV颜色空间，从而将输入的视频信号转换为亮度。
[式子1]
Figure PCTCN2017088184-appb-000003
Figure PCTCN2017088184-appb-000004
v＝max
这里，max表示r、g、b中的最大值，min表示r、g、b中的最小值，h表示HSV颜色空间的色调，s表示HSV颜色空间的饱和度，v表示HSV颜色空间的亮度，r表示输入的R数据，g表示输入的G数据，b表示输入的B数据。
平均亮度获取模块53用于获取显示第M帧图像时第N行像素的平均亮度，其中M和N均为正整数。这里，在输入的视频信号被转换为亮度之后， 平均亮度获取模块53可以先获取显示第M帧图像时第N行像素的每个像素的亮度，然后将获取的所有的像素的亮度相加并除以第N行像素的像素数量，从而得到显示第M帧图像时第N行像素的平均亮度。
亮度调节参数计算模块54用于根据显示第M帧图像时第N行像素的平均亮度、显示第M-1帧图像时第N行像素的平均亮度(之前被存储于存储模块中)以及显示第M帧图像时第N-1行像素的亮度调节参数(之前被存储于存储模块中)计算出显示第M帧图像时第N行像素的亮度调节参数。进一步地，亮度调节参数计算模块54利用下面的式子2计算出显示第M帧图像时第N行像素的亮度调节参数。
[式子2]CLN＝CLN-1+(ALN-AL'N)/N
其中，ALN表示显示第M帧图像时第N行像素的平均亮度，AL'N表示显示第M-1帧图像时第N行像素的平均亮度，CLN-1表示显示第M帧图像时第N-1行像素的亮度调节参数，CLN表示显示第M帧图像时第N行像素的亮度调节参数。
视频信号调节参数计算模块55用于根据显示第M帧图像时第N行像素的亮度调节参数、第一预设亮度调节参数和第二预设亮度调节参数计算出显示第M帧图像时第N行像素的视频信号调节参数。进一步地，视频信号调节参数计算模块55利用下面的式子3计算出显示第M帧图像时第N行像素的视频信号调节参数。
Figure PCTCN2017088184-appb-000005
其中，CLN表示显示第M帧图像时第N行像素的亮度调节参数，CLth1表示所述第一预设亮度调节参数，CLth2表示所述第二预设亮度调节参数，rN表示显示第M帧图像时第N行像素的视频信号调节参数，r1和r2分别表示两个不同的固定值，且r1大于r2。
输出模块56用于根据显示第M帧图像时第N行像素的视频信号调节参数对外部输入的显示第M帧图像时第N行像素对应的视频信号进行调节，以输 出调节后的显示第M帧图像时第N行像素对应的视频信号。进一步地，输出模块56利用下面的式子4对外部输入的显示第M帧图像时第N行像素对应的视频信号进行调节。
[式子4]DoutN＝DinN*rN
其中，DoutN表示调节后的显示第M帧图像时第N行像素对应的视频信号，DinN表示外部输入的显示第M帧图像时第N行像素对应的视频信号，rN表示显示第M帧图像时第N行像素的视频信号调节参数。这里，DinN包括外部输入的显示第M帧图像时第N行像素对应的R数据、G数据和B数据。DoutN包括调节后的显示第M帧图像时第N行像素对应的R’数据、G’数据和B’数据。
如上，可以根据每行像素的亮度来调节每行像素的视频信号，从而将输入的视频信号，诸如R数据、G数据和B数据，调节为被调节后的视频数据，诸如R’数据、G’数据和B’数据。
综上所述，能够通过控制像素将要显示的亮度来对视频信号进行调节，从而能够控制显示装置的亮度，进而能够控制显示装置的老化速度和使用成本。此外，由于本实施例是以行为单位来控制像素将要显示的亮度，因此在调节过程中，仅需动态地暂存每行像素的数据即可，能够大大节省存储空间。
图3是根据本发明的实施例的视频信号调节方法的流程图。
一并参照图2和图3，根据本发明的实施例的视频信号调节方法包括步骤：
S310：利用信号接收模块51从外部图形控制器接收输入的视频信号，诸如R、G、B数据。这里，可以配置一存储模块(未示出)来对输入的视频信号进行存储。此外，输入的视频信号包括提供给所有像素的视频信号。
S320：利用亮度转换模块52将输入的视频信号转换为亮度。
进一步地，在步骤S320中，亮度转换模块52可利用上面的式子1将输入的视频信号转换到HSV颜色空间，从而将输入的视频信号转换为亮度。
S330：利用平均亮度获取模块53获取显示第M帧图像时第N行像素的平均亮度，其中M和N均为正整数，并且1≤N≤n。
进一步地，在步骤S330中，在输入的视频信号被转换为亮度之后，平均亮度获取模块53可以先获取显示第M帧图像时第N行像素的每个像素的亮度，然后将获取的所有的像素的亮度相加并除以第N行像素的像素数量，从而得到显示第M帧图像时第N行像素的平均亮度。
S340：利用亮度调节参数计算模块54根据显示第M帧图像时第N行像素的平均亮度、显示第M-1帧图像时第N行像素的平均亮度(之前被存储于存储模块中)以及显示第M帧图像时第N-1行像素的亮度调节参数(之前被存储于存储模块中)计算出显示第M帧图像时第N行像素的亮度调节参数。
进一步地，在步骤S340中，亮度调节参数计算模块54利用上面的式子2计算出显示第M帧图像时第N行像素的亮度调节参数。
S350：利用视频信号调节参数计算模块55根据显示第M帧图像时第N行像素的亮度调节参数、第一预设亮度调节参数和第二预设亮度调节参数计算出显示第M帧图像时第N行像素的视频信号调节参数。
进一步地，在步骤S350中，视频信号调节参数计算模块55利用上面的式子3计算出显示第M帧图像时第N行像素的视频信号调节参数。
S360：利用输出模块56根据显示第M帧图像时第N行像素的视频信号调节参数对外部输入的显示第M帧图像时第N行像素对应的视频信号进行调节，以输出调节后的显示第M帧图像时第N行像素对应的视频信号。
进一步地，在步骤S360中，输出模块56利用上面的式子4对外部输入的显示第M帧图像时第N行像素对应的视频信号进行调节。
如上，可以根据每行像素的亮度来调节每行像素的视频信号，从而将输入的视频信号，诸如R数据、G数据和B数据，调节为被调节后的视频数据，诸如R’数据、G’数据和B’数据。
此外，本申请是参照根据本申请实施例的方法和设备(系统)来描述的。应理解的是，可由计算机程序指令结合信息感应设备实现流程图和/或方框图中的每一流程和/或方框、以及流程图和/或方框图中的流程和/或方框的结合。可提供这些计算机程序指令到通用计算机、专用计算机、嵌入式处理机或其他 可编程数据处理设备的处理器以产生一个机器，使得通过计算机或其他可编程数据处理设备的处理器执行的指令配合信息感应设备产生用于实现在流程图一个流程或多个流程和/或方框图一个方框或多个方框中指定的功能的装置。
此外，根据本发明的实施例的显示装置中的各个器件或模块可被实现为硬件组件。本领域技术人员根据限定的各个器件或模块所执行的处理，可以使用例如现场可编程门阵列(FPGA)或专用集成电路(ASIC)来实现各个器件或模块。
虽然已经参照特定实施例示出并描述了本发明，但是本领域的技术人员将理解：在不脱离由权利要求及其等同物限定的本发明的精神和范围的情况下，可在此进行形式和细节上的各种变化。

Claims (10)

  1. 一种显示装置的视频信号调节器，其中，包括：
    信号接收模块，用于接收外部输入的视频信号；
    亮度转换模块，用于将外部输入的视频信号转换为亮度；
    平均亮度获取模块，用于获取显示第M帧图像时第N行像素的平均亮度；
    亮度调节参数计算模块，用于根据显示第M帧图像时第N行像素的平均亮度、显示第M-1帧图像时第N行像素的平均亮度以及显示第M帧图像时第N-1行像素的亮度调节参数计算出显示第M帧图像时第N行像素的亮度调节参数；
    视频信号调节参数计算模块，用于根据显示第M帧图像时第N行像素的亮度调节参数、第一预设亮度调节参数和第二预设亮度调节参数计算出显示第M帧图像时第N行像素的视频信号调节参数；
    输出模块，用于根据显示第M帧图像时第N行像素的视频信号调节参数对外部输入的显示第M帧图像时第N行像素对应的视频信号进行调节，以输出调节后的显示第M帧图像时第N行像素对应的视频信号。
  2. 根据权利要求1所述的视频信号调节器，其中，所述亮度调节参数计算模块进一步用于利用下面的式子1根据显示第M帧图像时第N行像素的平均亮度、显示第M-1帧图像时第N行像素的平均亮度以及显示第M帧图像时第N-1行像素的亮度调节参数计算出显示第M帧图像时第N行像素的亮度调节参数，
    [式子1]  CLN＝CLN-1+(ALN-AL'N)/N
    其中，ALN表示显示第M帧图像时第N行像素的平均亮度，AL'N表示显示第M-1帧图像时第N行像素的平均亮度，CLN-1表示显示第M帧图像时第N-1行像素的亮度调节参数，CLN表示显示第M帧图像时第N行像素的亮度调节 参数。
  3. 根据权利要求1所述的视频信号调节器，其中，所述视频信号调节参数获取模块进一步用于利用下面的式子2根据显示第M帧图像时第N行像素的亮度调节参数、第一预设亮度调节参数和第二预设亮度调节参数获取显示第M帧图像时第N行像素的视频信号调节参数，
    Figure PCTCN2017088184-appb-100001
    其中，CLN表示显示第M帧图像时第N行像素的亮度调节参数，CLth1表示所述第一预设亮度调节参数，CLth2表示所述第二预设亮度调节参数，rN表示显示第M帧图像时第N行像素的视频信号调节参数，r1和r2分别表示两个不同的固定值。
  4. 根据权利要求1所述的视频信号调节器，其中，所述输出模块进一步用于利用下面的式子3根据显示第M帧图像时第N行像素的视频信号调节参数对外部输入的显示第M帧图像时第N行像素对应的视频信号进行调节，
    [式子3]  DoutN＝DinN*rN
    其中，DoutN表示调节后的显示第M帧图像时第N行像素对应的视频信号，DinN表示外部输入的显示第M帧图像时第N行像素对应的视频信号，rN表示显示第M帧图像时第N行像素的视频信号调节参数。
  5. 根据权利要求1所述的视频信号调节器，其中，所述亮度转换模块进一步用于将外部输入的视频信号转换到HSV颜色空间，从而将外部输入的视频信号转换为亮度。
  6. 一种显示装置的视频信号调节方法，其中，包括：
    接收外部输入的视频信号；
    将外部输入的视频信号转换为亮度；
    获取显示第M帧图像时第N行像素的平均亮度；
    根据显示第M帧图像时第N行像素的平均亮度、显示第M-1帧图像时第N行像素的平均亮度以及显示第M帧图像时第N-1行像素的亮度调节参数计算出显示第M帧图像时第N行像素的亮度调节参数；
    根据显示第M帧图像时第N行像素的亮度调节参数、第一预设亮度调节参数和第二预设亮度调节参数计算出显示第M帧图像时第N行像素的视频信号调节参数；
    根据显示第M帧图像时第N行像素的视频信号调节参数对外部输入的显示第M帧图像时第N行像素对应的视频信号进行调节，以输出调节后的显示第M帧图像时第N行像素对应的视频信号。
  7. 根据权利要求6所述的视频信号调节方法，其中，利用下面的式子1根据显示第M帧图像时第N行像素的平均亮度、显示第M-1帧图像时第N行像素的平均亮度以及显示第M帧图像时第N-1行像素的亮度调节参数计算出显示第M帧图像时第N行像素的亮度调节参数，
    [式子1]  CLN＝CLN-1+(ALN-AL'N)/N
    其中，ALN表示显示第M帧图像时第N行像素的平均亮度，AL'N表示显示第M-1帧图像时第N行像素的平均亮度，CLN-1表示显示第M帧图像时第N-1行像素的亮度调节参数，CLN表示显示第M帧图像时第N行像素的亮度调节参数。
  8. 根据权利要求6所述的视频信号调节方法，其中，利用下面的式子2根据显示第M帧图像时第N行像素的亮度调节参数、第一预设亮度调节参数和第二预设亮度调节参数获取显示第M帧图像时第N行像素的视频信号调节参数，
    Figure PCTCN2017088184-appb-100002
    其中，CLN表示显示第M帧图像时第N行像素的亮度调节参数，CLth1表示所述第一预设亮度调节参数，CLth2表示所述第二预设亮度调节参数，rN表示 显示第M帧图像时第N行像素的视频信号调节参数，r1和r2分别表示两个不同的固定值，且r1大于r2。
  9. 根据权利要求6所述的视频信号调节方法，其中，利用下面的式子3根据显示第M帧图像时第N行像素的视频信号调节参数对外部输入的显示第M帧图像时第N行像素对应的视频信号进行调节，
    [式子3]DoutN＝DinN*rN
    其中，DoutN表示调节后的显示第M帧图像时第N行像素对应的视频信号，DinN表示外部输入的显示第M帧图像时第N行像素对应的视频信号，rN表示显示第M帧图像时第N行像素的视频信号调节参数。
  10. 根据权利要求6所述的视频信号调节方法，其中，将外部输入的视频信号转换到HSV颜色空间，从而将外部输入的视频信号转换为亮度。
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