WO2019080269A1 - Amoled显示装置的亮度和色度自动调整方法及系统 - Google Patents

Amoled显示装置的亮度和色度自动调整方法及系统

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WO2019080269A1
WO2019080269A1 PCT/CN2017/114894 CN2017114894W WO2019080269A1 WO 2019080269 A1 WO2019080269 A1 WO 2019080269A1 CN 2017114894 W CN2017114894 W CN 2017114894W WO 2019080269 A1 WO2019080269 A1 WO 2019080269A1
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brightness
driving voltage
module
display
target
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PCT/CN2017/114894
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English (en)
French (fr)
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颜伟男
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武汉华星光电半导体显示技术有限公司
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Priority to US15/735,611 priority Critical patent/US20190122607A1/en
Publication of WO2019080269A1 publication Critical patent/WO2019080269A1/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]
    • 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
    • G09G2320/06—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
    • G09G2320/0673—Adjustment of display parameters for control of gamma adjustment, e.g. selecting another gamma curve

Definitions

  • the present invention relates to the field of display technologies, and in particular, to a method and system for automatically adjusting brightness and chromaticity of an AMOLED display device.
  • AMOLED Active Matrix Organic Light Emitting Diode
  • LCD liquid crystal display
  • OLED Organic Light Emitting Diode
  • It is expected to become the next generation of flat panel display technology and is one of the most popular technologies in flat panel display technology.
  • the process variation between different devices may result in different display effects of the device.
  • different users have different requirements on the color temperature and gamma parameters of the display device.
  • it is often necessary to adjust the brightness and chromaticity of the display device before it leaves the factory. Due to the limitation of the illumination principle and characteristics of AMOLED, the brightness and chromaticity adjustment are more difficult than LCD and the speed is correspondingly slower, thus affecting the production capacity.
  • the brightness and chromaticity adjustment methods of the prior art AMOLED display device are greatly affected by the process variation due to the limitation of the illumination principle and characteristics of the AMOLED, making the brightness and chromaticity adjustment more difficult than the LCD. Large, and the speed is correspondingly slower, which affects production capacity.
  • the invention provides a method and a system for automatically adjusting the brightness and chromaticity of an AMOLED display device, which can speed up the automatic adjustment of the brightness and chromaticity of the display device, and is less affected by the process variation, thereby saving production debugging of the OLED display device. Time, which in turn increases production capacity.
  • the invention provides a method for automatically adjusting brightness and chromaticity of an AMOLED display device, comprising the following steps:
  • Step S101 The optical measurement module optically measures the display module to obtain maximum brightness LRm, LGm, LBm and chromaticity coordinates (xr, yr), (xg, yg), (xb, yb) of each monochrome screen of the display module. );
  • Step S102 the optical measurement module transmits the measured maximum brightness and the chromaticity coordinates to the operation control module;
  • Step S103 the operation control module receives the information of the maximum brightness and the chromaticity coordinates, and calculates a target brightness value of each gray level by using the maximum brightness and gamma curve, and adjusts a current driving voltage to achieve a target chromaticity. And calculating a target driving voltage to obtain a driving voltage for satisfying the brightness of the display module to meet the target brightness; the operation control module controls a gray level to be displayed by the display module, and outputs a register value corresponding to the driving voltage ;
  • Step S104 The operation control module controls the display driving module, and the display driving module transmits the required driving voltage to the display module to automatically adjust the current driving voltage.
  • the step S103 specifically includes the following steps:
  • Step S1031 According to the measured maximum brightness and chromaticity coordinates of each monochrome screen of the to-be-displayed display module, obtain R/G/B driving voltage values VR, VG, VB corresponding to when the display screen satisfies the white screen target chromaticity coordinates. ;
  • Step S1032 controlling the R/G/B driving voltage according to the OLED device characteristics, so that the screen displayed by the display module maintains a white screen;
  • Step S1033 combined with the minimum brightness Lmin to obtain a set of different driving voltage brightness values Li, each Li respectively corresponding to a set of driving voltages VRi, VVi, VBi;
  • Step S1034 calculating the brightness value Lx of any gray level x according to the maximum brightness Lmax of the white screen and the target gamma curve;
  • Step S1035 Calculate the corresponding three-color driving voltages VRx, VGx, VBx by using the luminance value Lx of a gray scale x in the luminance value Li of a set of driving voltages measured in advance.
  • the relationship of the three color driving voltages is:
  • the step S104 specifically includes: the display driving module receives the information, outputs VRx, VGx, VBx, and fine-tunes the driving voltage to make the display device meet the target white.
  • the chroma and gamma curves of the picture are the display driving module receives the information, outputs VRx, VGx, VBx, and fine-tunes the driving voltage to make the display device meet the target white.
  • the invention also provides an automatic brightness and chromaticity adjustment system for an AMOLED display device, the system comprising: a display module for displaying screen information; an optical measurement module for optically measuring the display module; and an operation control module for Calculating a target brightness and chromaticity value of each gray scale, and a driving voltage of the display module whose brightness and chromaticity are closest to the target; and displaying a driving module for transmitting the required driving voltage to the display module .
  • the operation control module includes a calculation unit, configured to obtain a target brightness value required for each gray level according to the maximum brightness Lmax and the gamma coefficient, and to adjust the current driving voltage of the display device. And calculating a target driving voltage to make the brightness of the display device meet the target brightness; the operation control module further includes a data receiving unit, the data receiving unit is configured to receive the measured by the optical measuring module Display module brightness and chromaticity coordinates.
  • the operation control module when any one of the maximum brightness of each monochrome picture measured by the optical measurement module is greater than or equal to a target brightness value of three colors, the operation control module performs the same with the display driving module. White balance adjustment.
  • the operation control module further includes a storage unit for storing the current measurement value and the brightness value of the display device under a plurality of different driving voltages.
  • the operation control module further includes a control output unit, wherein the control output unit is configured to control a gray scale to be displayed by the display device, and is configured to output a register value corresponding to the driving voltage.
  • the invention also provides a method for automatically adjusting brightness and chromaticity of an AMOLED display device, comprising the following steps:
  • Step S101 The optical measurement module optically measures the display module to obtain maximum brightness LRm, LGm, LBm and chromaticity coordinates (xr, yr), (xg, yg), (xb, yb) of each monochrome screen of the display module. );
  • Step S102 the optical measurement module transmits the measured maximum brightness and the chromaticity coordinates to the operation control module;
  • Step S103 the operation control module receives the information of the maximum brightness and the chromaticity coordinates, and calculates a target brightness value of each gray level by using the maximum brightness and gamma curve, and adjusts a current driving voltage to achieve a target chromaticity. Coordinates, and then calculating the target driving voltage to obtain a driving voltage that makes the brightness of the display module meet the target brightness;
  • Step S104 The operation control module controls the display driving module, and the display driving module transmits the required driving voltage to the display module to automatically adjust the current driving voltage.
  • the step S103 specifically includes the following steps:
  • Step S1031 According to the measured maximum brightness and chromaticity coordinates of each monochrome screen of the to-be-displayed display module, obtain R/G/B driving voltage values VR, VG, VB corresponding to when the display screen satisfies the white screen target chromaticity coordinates. ;
  • Step S1032 controlling the R/G/B driving voltage according to the OLED device characteristics, so that the screen displayed by the display module maintains a white screen;
  • Step S1033 combined with the minimum brightness Lmin to obtain a set of different driving voltage brightness values Li, each Li respectively corresponding to a set of driving voltages VRi, VVi, VBi;
  • Step S1034 calculating the brightness value Lx of any gray level x according to the maximum brightness Lmax of the white screen and the target gamma curve;
  • Step S1035 Calculate the corresponding three-color driving voltages VRx, VGx, VBx by comparing the luminance value Lx of a gray scale x with the difference value of the luminance values Li of a set of driving voltages measured in advance.
  • the relationship of the three color driving voltages is:
  • the step S104 specifically includes: the display driving module receives the information, outputs VRx, VGx, VBx, and fine-tunes the driving voltage to make the display device meet the target white.
  • the chroma and gamma curves of the picture are the display driving module receives the information, outputs VRx, VGx, VBx, and fine-tunes the driving voltage to make the display device meet the target white.
  • the invention has the beneficial effects that the brightness and chromaticity adjustment method of the AMOLED display device provided by the present invention does not need to establish the monochromatic brightness with the driving method as compared with the brightness and chromaticity adjustment method of the existing AMOLED display device.
  • the voltage change look-up table reduces the influence of process variation.
  • the white balance and gamma adjustment algorithms are accurate and fast, so that the driving voltage quickly approaches the target value, reducing the amount of calculation of the program and speeding up the process.
  • the brightness and chromaticity of the display device are automatically adjusted, thereby saving production and debugging time of the OLED display device, thereby increasing productivity.
  • FIG. 1 is a flowchart of a method for adjusting brightness and chromaticity of an AMOLED display device according to an embodiment of the present invention
  • FIG. 2 is a flowchart of a method for adjusting brightness and chromaticity of an AMOLED display device by an operation control module according to an embodiment of the present invention
  • FIG. 3 is a schematic structural diagram of a brightness and chromaticity adjustment system of an AMOLED display device according to an embodiment of the present invention
  • FIG. 4 is a schematic structural diagram of a system of an operation control module according to an embodiment of the present invention.
  • the present invention is directed to a method and system for adjusting brightness and chromaticity of an existing AMOLED display device, which solves the problem of brightness and chromaticity adjustment of the AMOLED display device of the prior art, which is subject to the limitation of the illumination principle and characteristics of the AMOLED.
  • the difference in the influence is large, so that the brightness and chromaticity adjustment are more difficult than the LCD, and the speed is correspondingly slower, thereby affecting the technical problem of the production capacity, and the embodiment of the present invention can solve the defect.
  • the invention provides a method for automatically adjusting brightness and chromaticity of an AMOLED display device, and the automatic adjustment method comprises the following steps:
  • Step S101 The optical measurement module optically measures the display module to obtain maximum brightness LRm, LGm, LBm and chromaticity coordinates (xr, yr), (xg, yg), (xb, yb) of each monochrome screen of the display module. );
  • Step S102 the optical measurement module transmits the measured maximum brightness and the chromaticity coordinates to the operation control module;
  • Step S103 the operation control module receives the information of the maximum brightness and the chromaticity coordinates, and calculates a target brightness value of each gray level by using the maximum brightness and gamma curve, and adjusts a current driving voltage to achieve a target chromaticity. Coordinates, and then calculating the target driving voltage to obtain a driving voltage that makes the brightness of the display module meet the target brightness;
  • Step S104 The operation control module controls the display driving module, and the display driving module transmits the required driving voltage to the display module to automatically adjust the current driving voltage.
  • the step S103 further includes: the operation control module controls a gray scale to be displayed by the display module, and outputs a register value corresponding to the driving voltage.
  • the step S103 specifically includes the following steps:
  • Step S1031 According to the measured maximum brightness and chromaticity coordinates of each monochrome screen of the to-be-displayed display module, obtain R/G/B driving voltage values VR, VG, VB corresponding to when the display screen satisfies the white screen target chromaticity coordinates. ;
  • Step S1032 controlling the R/G/B driving voltage according to the OLED device characteristics, so that the screen displayed by the display module maintains a white screen;
  • Step S1033 combined with the minimum brightness Lmin to obtain a set of different driving voltage brightness values Li, each Li respectively corresponding to a set of driving voltages VRi, VVi, VBi;
  • Step S1034 calculating the brightness value Lx of any gray level x according to the maximum brightness Lmax of the white screen and the target gamma curve;
  • Step S1035 Calculate the corresponding three-color driving voltages VRx, VGx, VBx by using the luminance value Lx of a gray scale x in the luminance value Li of a set of driving voltages measured in advance.
  • the step S104 specifically includes: the display driving module receives the information, outputs VRx, VGx, VBx, and performs fine adjustment on the driving voltage to make the display device meet the chromaticity and gamma curve of the target white picture.
  • the manner of automatically adjusting the automatic adjustment method is specifically as follows: First, the optical measurement module measures maximum brightness LRm, LGm, LBm and chromaticity coordinates (xr, yr), (xg) of each monochrome picture of the display device. , yg), (xb, yb), wherein the chromaticity coordinates of the three colors are fixed and do not change with the change of the driving voltage. Therefore, based on the maximum brightness Lmax input by the user and the target white point coordinate (xt, yt), the target brightness values LRt, LGt, LBt contributed by the three colors when the display brightness is Lmax can be calculated.
  • Equation (1) (2) the target brightness values LRt, LGt, LBt of the three colors can be calculated. If LRm, LGm, LBm satisfy any one of formula (3), the display device cannot meet the user's needs. .
  • the control output unit controls the display driving module to output a set of driving voltages VR′, VG′, VB′, so that the brightness and chromaticity coordinates displayed by the display device are respectively L′ And (x', y'), you can use formula (1) to calculate the ratio of the three colors in the current brightness L':
  • the conventional OLED pixel 2T1C circuit is shown in Figure 4.
  • the current I OLED through the OLED device can be expressed as:
  • I OLED k(V GS -V th ) 2 (5)
  • V GS is the voltage difference between the gate and source of T2
  • Vth is the threshold voltage of T2
  • k is related to the carrier mobility, structure, and channel capacitance of T2.
  • I OLED k(V data -VDD) 2 (6)
  • e represents the luminous efficiency of the OLED device, and the luminous efficiency is constant for a single-color OLED. therefore:
  • the /G/B drive voltage is such that the picture displayed by the display device maintains a white screen.
  • a set of VRI and VGi can be obtained by using p and q, and the brightness Li at this time is measured, and each set of data is stored in the storage unit.
  • the brightness value Lx corresponding to any gray level Gx can be calculated:
  • the Lx is linearly interpolated in Li, and the corresponding three-color driving voltage values VRx, VGx, VBx are approximated. For example, if L(i-1) ⁇ Lx ⁇ Li, then:
  • ⁇ can take 2 or other values.
  • the fine adjustment can be obtained by the equation (1) and (2) obtaining the measured value and the target value of the R/G/B luminance, and then adjusting the three-color driving voltage separately.
  • the present invention also provides an automatic adjustment system for brightness and chromaticity of an AMOLED display device.
  • the system includes: a display module 301 for displaying screen information; and an optical measurement module 302 for performing display module Optically measuring, and transmitting the measured brightness and color coordinates to the operation control module 303;
  • the operation control module 303 is configured to calculate the target brightness and gamma curve to obtain the target brightness and chromaticity values of each gray level, and measure The data is calculated to obtain a driving voltage that causes the brightness and chromaticity of the display module 301 to be closest to the target;
  • the display driving module 304 converts the received register value into a driving voltage, and transmits the required driving voltage to the
  • the display module 301 is described.
  • the structure of the operation control module 303 is divided into a data receiving unit 401, a storage unit 402, a calculating unit 403, and a control output unit 404, as shown in FIG.
  • the data receiving unit 401 is configured to receive display module brightness and chromaticity coordinates measured by the optical measurement module.
  • the storage unit 402 is configured to store current measurement values and brightness values of the display device under multiple sets of different driving voltages.
  • the calculating unit 403 mainly includes: obtaining a maximum brightness Lmax and a gamma coefficient input by the user, obtaining a target brightness value required for each gray level; adjusting a current driving voltage of the display device to achieve a target color of the display screen
  • the chromaticity coordinates that is, the white point coordinates (Xwt, Ywt) input by the user; the target driving voltage is calculated such that the brightness of the display device satisfies the target brightness.
  • the control output unit 404 is configured to control a gray scale to be displayed by the display device, and output a register value corresponding to the driving voltage. The system performs white balance adjustment when any one of the maximum brightness of each monochrome picture measured by the optical measurement module is greater than or equal to the target brightness value of three colors.
  • the method and system for automatically adjusting the brightness and chromaticity of the AMOLED display device do not need to establish the monochromatic brightness with the driving voltage. Change the look-up table to reduce the impact caused by process differences. Using OLED drive and illuminating characteristics, the white balance and gamma adjustment algorithm are accurate and fast, so that the driving voltage quickly approaches the target value, reducing the calculation amount of the program and speeding up the display. The brightness and chromaticity of the device are automatically adjusted, thereby saving production and debugging time of the OLED display device, thereby increasing the throughput.

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Abstract

一种AMOLED显示装置的亮度与色度自动调整方法及系统，所述方法包括：光学测量模块（302）对显示模块（301）的亮度和色坐标进行测量并传递给运算控制模块（303）；运算控制模块（303）对目标亮度和gamma曲线进行计算得到各灰阶的目标亮度及色度值，计算使显示模块（301）的亮度和色度与目标最接近的驱动电压；运算控制模块（303）将所需的驱动电压传递给显示装置。

Description

AMOLED显示装置的亮度和色度自动调整方法及系统 技术领域
本发明涉及显示技术领域，尤其涉及一种AMOLED显示装置的亮度和色度自动调整方法及系统。
背景技术
AMOLED(有源矩阵有机发光二极体)是一种应用于电视和移动设备中的显示技术，相比现在的主流液晶显示器，OLED具有高对比度，广视角，低功耗，体积更薄等优点，有望成为下一代平板显示技术，是目前平板显示技术中最受关注的技术之一。在大批量生产AMOLED显示装置时，不同设备间的制程工艺差异会导致设备的显示效果不同，同时，不同的用户对显示装置的色温和gamma参数要求也不同。为了让同一批产品具有一致性，往往在显示装置出厂前，需要对其亮度和色度进行调整。由于AMOLED的发光原理和特性的限制，使得其亮度和色度调整的难度较LCD更大，速度也相应更慢，从而影响产能。
综上所述，现有技术的AMOLED显示装置的亮度和色度调整方法，由于AMOLED的发光原理和特性的限制，其受制程差异影响较大，使得其亮度和色度调整的难度较LCD更大，速度也相应更慢，从而影响产能。
发明内容
本发明提供一种AMOLED显示装置的亮度和色度自动调整 方法及系统，能够加快对显示装置的亮度和色度进行自动调整的速度，且受制程差异影响小，从而节省OLED显示装置的生产调试时间，进而提升产能。
为解决上述问题，本发明提供的技术方案如下：
本发明提供一种AMOLED显示装置的亮度和色度自动调整方法，包括以下步骤：
步骤S101、光学测量模块对显示模块进行光学测量，得到所述显示模块各单色画面的最大亮度LRm、LGm、LBm及色度坐标(xr，yr)、(xg，yg)、(xb，yb)；
步骤S102、所述光学测量模块将测量的所述最大亮度和所述色度坐标传递给运算控制模块；
步骤S103、所述运算控制模块接收所述最大亮度与所述色度坐标的信息，并通过所述最大亮度和gamma曲线计算得到各灰阶的目标亮度值，调整当前驱动电压以达到目标色度坐标，再计算目标驱动电压，得到使所述显示模块的亮度满足目标亮度的驱动电压；所述运算控制模块控制所述显示模块所需显示的灰阶，并输出所述驱动电压对应的寄存器值；
步骤S104、所述运算控制模块控制显示驱动模块，所述显示驱动模块将所需的所述驱动电压传递给所述显示模块，以对当前驱动电压进行自动调整。
根据本发明一优选实施例，所述步骤S103具体包括以下步骤：
步骤S1031、根据测得待调显示模块各单色画面的最大亮度 及色度坐标，获得当显示画面满足白画面目标色度坐标时所对应的R/G/B驱动电压值VR，VG，VB；
步骤S1032、根据OLED器件特性，控制R/G/B驱动电压，以使所述显示模块所显示的画面维持白画面；
步骤S1033、结合最小亮度Lmin得到一组不同驱动电压的亮度值Li，每个Li分别对应一组驱动电压VRi，VGi，VBi；
步骤S1034、根据白画面最大亮度Lmax及目标gamma曲线，计算任一灰阶x的亮度值Lx；
步骤S1035、将一灰阶x的亮度值Lx在预先测得的一组驱动电压的亮度值Li中差值，计算得到对应的三色驱动电压VRx，VGx，VBx。
根据本发明一优选实施例，所述三色驱动电压的关系为：
(V R255-VDD)∶(V G255-VDD)∶(V B255-VDD)＝(V R128-VDD)∶(V G128-VDD)∶(V B128-VDD)
即在色度坐标保持不变的情况下，三色驱动电压(Vx-VDD)的比例保持不变，以此获得不同亮度白画面下三色驱动电压的关系。
根据本发明一优选实施例，所述步骤S104具体包括：所述显示驱动模块接受到信息，输出VRx，VGx，VBx，并在此基础上对驱动电压进行微调，使所述显示装置满足目标白色画面的色度和gamma曲线。
本发明还提供一种AMOLED显示装置的亮度与色度自动调整系统，所述系统包括：显示模块，用以显示画面信息；光学测量模块，用以对显示模块进行光学测量；运算控制模块，用以计 算得到各灰阶的目标亮度及色度值，以及显示模块的亮度和色度与目标最接近的驱动电压；显示驱动模块，用以将所需的所述驱动电压传递给所述显示模块。
其中，所述运算控制模块包括计算单元，所述计算单元用以根据最大亮度Lmax和gamma系数，获得各个灰阶所需的目标亮度值；且用以对所述显示装置的当前驱动电压进行调整，以及用以计算目标驱动电压，以使所述显示装置的亮度满足目标亮度；所述运算控制模块还包括数据接收单元，所述数据接收单元用于接收由所述光学测量模块测得的所述显示模块亮度及色度坐标。
根据本发明一优选实施例，所述光学测量模块测量的各单色画面的最大亮度中的任意一项大于或等于三色的目标亮度值时，所述运算控制模块与所述显示驱动模块进行白平衡调节。
根据本发明一优选实施例，所述运算控制模块还包括存储单元，所述存储单元用于存储当前测量值以及多组不同驱动电压下所述显示装置的亮度值。
根据本发明一优选实施例，所述运算控制模块还包括控制输出单元，所述控制输出单元用于控制所述显示装置需显示的灰阶，并用以输出驱动电压对应的寄存器值。
本发明还提供一种AMOLED显示装置的亮度和色度自动调整方法，包括以下步骤：
步骤S101、光学测量模块对显示模块进行光学测量，得到所述显示模块各单色画面的最大亮度LRm、LGm、LBm及色度坐标(xr，yr)、(xg，yg)、(xb，yb)；
步骤S102、所述光学测量模块将测量的所述最大亮度和所述色度坐标传递给运算控制模块；
步骤S103、所述运算控制模块接收所述最大亮度与所述色度坐标的信息，并通过所述最大亮度和gamma曲线计算得到各灰阶的目标亮度值，调整当前驱动电压以达到目标色度坐标，再计算目标驱动电压，得到使所述显示模块的亮度满足目标亮度的驱动电压；
步骤S104、所述运算控制模块控制显示驱动模块，所述显示驱动模块将所需的所述驱动电压传递给所述显示模块，以对当前驱动电压进行自动调整。
根据本发明一优选实施例，所述步骤S103具体包括以下步骤：
步骤S1031、根据测得待调显示模块各单色画面的最大亮度及色度坐标，获得当显示画面满足白画面目标色度坐标时所对应的R/G/B驱动电压值VR，VG，VB；
步骤S1032、根据OLED器件特性，控制R/G/B驱动电压，以使所述显示模块所显示的画面维持白画面；
步骤S1033、结合最小亮度Lmin得到一组不同驱动电压的亮度值Li，每个Li分别对应一组驱动电压VRi，VGi，VBi；
步骤S1034、根据白画面最大亮度Lmax及目标gamma曲线，计算任一灰阶x的亮度值Lx；
步骤S1035、将一灰阶x的亮度值Lx在预先测得的一组驱动电压的亮度值Li中差值，计算得到对应的三色驱动电压VRx， VGx，VBx。
根据本发明一优选实施例，所述三色驱动电压的关系为：
(V R255-VDD)∶(V G255-VDD)∶(V B255-VDD)＝(V R128-VDD)∶(V G128-VDD)∶(V B128-VDD)
即在色度坐标保持不变的情况下，三色驱动电压(Vx-VDD)的比例保持不变，以此获得不同亮度白画面下三色驱动电压的关系。
根据本发明一优选实施例，所述步骤S104具体包括：所述显示驱动模块接受到信息，输出VRx，VGx，VBx，并在此基础上对驱动电压进行微调，使所述显示装置满足目标白色画面的色度和gamma曲线。
本发明的有益效果为：相较于现有的AMOLED显示装置的亮度和色度调整方法，本发明所提供的一种AMOLED显示装置的亮度和色度调整方法，无需建立单色光亮度随驱动电压变化的查找表，减少因制程差异带来的影响，利用OLED驱动及发光特性，使白平衡和Gamma调整算法精准并快速，使驱动电压快速趋近目标值，减少程序的计算量，加快对显示装置的亮度和色度进行自动调整的速度，从而节省OLED显示装置的生产调试时间，进而提升产能。
附图说明
为了更清楚地说明实施例或现有技术中的技术方案，下面将对实施例或现有技术描述中所需要使用的附图作简单介绍，显而 易见地，下面描述中的附图仅仅是发明的一些实施例，对于本领域普通技术人员来讲，在不付出创造性劳动的前提下，还可以根据这些附图获得其他的附图。
图1为本发明实施例提供的一种AMOLED显示装置的亮度和色度调整方法流程图；
图2为本发明实施例提供的运算控制模块对AMOLED显示装置的亮度和色度调整方法流程图；
图3为本发明实施例提供的一种AMOLED显示装置的亮度和色度调整系统结构示意图；
图4为本发明实施例提供的运算控制模块的系统结构示意图。
具体实施方式
以下各实施例的说明是参考附加的图示，用以例示本发明可用以实施的特定实施例。本发明所提到的方向用语，例如[上]、[下]、[前]、[后]、[左]、[右]、[内]、[外]、[侧面]等，仅是参考附加图式的方向。因此，使用的方向用语是用以说明及理解本发明，而非用以限制本发明。在图中，结构相似的单元是用以相同标号表示。
本发明针对现有的AMOLED显示装置的亮度和色度调整方法及系统，解决了现有技术的AMOLED显示装置的亮度和色度调整过程中，由于AMOLED的发光原理和特性的限制，其受制程差异影响较大，使得其亮度和色度调整的难度较LCD更大，速 度也相应更慢，从而影响产能的技术问题，本发明实施例能够解决该缺陷。
本发明提供了一种AMOLED显示装置的亮度和色度自动调整方法，该所述自动调整方法包括以下步骤：
步骤S101、光学测量模块对显示模块进行光学测量，得到所述显示模块各单色画面的最大亮度LRm、LGm、LBm及色度坐标(xr，yr)、(xg，yg)、(xb，yb)；
步骤S102、所述光学测量模块将测量的所述最大亮度和所述色度坐标传递给运算控制模块；
步骤S103、所述运算控制模块接收所述最大亮度与所述色度坐标的信息，并通过所述最大亮度和gamma曲线计算得到各灰阶的目标亮度值，调整当前驱动电压以达到目标色度坐标，再计算目标驱动电压，得到使所述显示模块的亮度满足目标亮度的驱动电压；
步骤S104、所述运算控制模块控制显示驱动模块，所述显示驱动模块将所需的所述驱动电压传递给所述显示模块，以对当前驱动电压进行自动调整。
其中，在所述步骤S103之后还包括：所述运算控制模块控制所述显示模块所需显示的灰阶，并输出所述驱动电压对应的寄存器值。
所述步骤S103具体包括以下步骤：
步骤S1031、根据测得待调显示模块各单色画面的最大亮度及色度坐标，获得当显示画面满足白画面目标色度坐标时所对应 的R/G/B驱动电压值VR，VG，VB；
步骤S1032、根据OLED器件特性，控制R/G/B驱动电压，以使所述显示模块所显示的画面维持白画面；
步骤S1033、结合最小亮度Lmin得到一组不同驱动电压的亮度值Li，每个Li分别对应一组驱动电压VRi，VGi，VBi；
步骤S1034、根据白画面最大亮度Lmax及目标gamma曲线，计算任一灰阶x的亮度值Lx；
步骤S1035、将一灰阶x的亮度值Lx在预先测得的一组驱动电压的亮度值Li中差值，计算得到对应的三色驱动电压VRx，VGx，VBx。
所述步骤S104具体包括：所述显示驱动模块接受到信息，输出VRx，VGx，VBx，并在此基础上对驱动电压进行微调，使显示装置满足目标白色画面的色度和gamma曲线。
该所述自动调整方法实现自动调整的方式具体为以下内容：首先，光学测量模块测量所述显示装置各单色画面的最大亮度LRm、LGm、LBm及色度坐标(xr，yr)、(xg，yg)、(xb，yb)，其中三色的色度坐标是固定的，不随驱动电压的变化而改变。因此根据用户输入的最大亮度Lmax以及目标白点坐标(xt，yt)，可以计算出显示亮度为Lmax时，三色所贡献的目标亮度值LRt，LGt，LBt。
已知三色亮度值及色度坐标有如下关系：
Figure PCTCN2017114894-appb-000001
Figure PCTCN2017114894-appb-000002
公式(1)(2)，可以计算得到三色的目标亮度值LRt，LGt，LBt，如果LRm、LGm、LBm满足公式(3)中的任意一项，说明该所述显示装置无法满足用户需求。
Figure PCTCN2017114894-appb-000003
如果公式(3)不成立，则可以进行白平衡调节。取m＝LGt/LRt，n＝LBt/LRt，控制输出单元控制显示驱动模块输出一组驱动电压VR’，VG’，VB’，使所述显示装置显示的亮度和色度坐标分别为L’和(x’，y’)，可以利用公式(1)计算出当前亮度L’中三中颜色的比例：
Figure PCTCN2017114894-appb-000004
假如m’＜m：增加VG’提高绿色比例；m’＞m：减小VG；n’＜n：增加VB’提高蓝色比例；n’＞n：减小VB’。直到使m’＝m，n’＝n或两者在可允许的误差范围内，说明当前白色的色度坐标满足目标色度值，此时三色驱动电压分别为VR，VG，VB。
传统的OLED像素2T1C电路如图4所示，通过OLED器件的电流I OLED可表示为：
I OLED＝k(V GS-V th) 2      (5)
其中V GS为T2栅极和源极之间的压差，Vth为T2的阈值电 压，k与T2的载流子迁移率、构造、沟道电容等特性有关。近几年发展了多种Vth补偿电路，可以消除Vth对IOLED的影响，本发明主要针对具有Vth补偿功能的像素电路，因此公式(5)可简化为：
I OLED＝k(V data-VDD) 2    (6)
众所周知，当电流通过OLED器件使，其产生的亮度与电流近似成正比的关系，即：
L OLED∝e·I OLED     (7)
e表示OLED器件的发光效率，针对某单色OLED，发光效率为常数。因此：
L OLED∝ek(V data-VDD) 2     (8)
由色度原理可知，当色坐标不变时，R/G/B三色间的亮度比例保持不变，即：
L R255∶L G255∶L B255＝L R128∶L G128∶L B128    (9)
因此可以得到不同亮度间，三色驱动电压的关系：
(V R255-VDD)∶(V G255-VDD)∶(V B255-VDD)＝(V R128-VDD)∶(V G128-VDD)∶(V B128-VDD)       (10)
即在色度坐标保持不变的情况下，三色驱动电压(Vx-VDD)的比例保持不变，因此可以利用此规律快速获得不同亮度白画面下，三色驱动电压的关系，可以控制R/G/B驱动电压，以使所述显示装置所显示的画面维持白画面。例如前文已经获得任一白画面下的驱动电压VR，VG，VB，取p＝(VR-VDD)/(VB-VDD)，q＝(VG-VDD)/(VB-VDD)，在显示驱动模块可支持的电压范围内改变VB，得到VBi，利用p、q可相应地得到一组VRi、VGi，测 得此时的亮度Li，各测量一组数据存入存储单元。
测量所述显示装置的最小亮度Lmin，根据用户输入的最大亮度Lmax、gamma指数γ，可以计算出任一灰阶Gx对应的亮度值Lx：
Figure PCTCN2017114894-appb-000005
n为大于0的整数，0＜Gx＜2 n-1，优选的2 8-1＝255。
将Lx在Li中进行线性插值，近似计算出对应的三色驱动电压值VRx，VGx，VBx。例如，如果L(i-1)≤Lx＜Li，那么：
Figure PCTCN2017114894-appb-000006
由于驱动电压与亮度并非线性对应关系，但其中影响因素复杂，所以本设计只利用线性插值得到近似的目标电压，然后再进行微调得到用户需求的白画面色度和gamma曲线。也可以使用非线性对应关系进行插值，如：
Figure PCTCN2017114894-appb-000007
α可以取2或其他数值。
微调可以由公式(1)(2)获得R/G/B亮度的实测值和目标值，再分别调整三色驱动电压来实现。
本发明还提供一种AMOLED显示装置的亮度与色度自动调整系统，如图3所示，所述系统包括：显示模块301，用以显示画面信息；光学测量模块302，用以对显示模块进行光学测量， 并将测量的亮度和色坐标传递给运算控制模块303；所述运算控制模块303，用以对目标亮度和gamma曲线进行计算得到各灰阶的目标亮度及色度值，并对测量数据进行计算，得到使所述显示模块301的亮度和色度与目标最接近的驱动电压；显示驱动模块304将接收到的寄存器值转换为驱动电压，将所需的所述驱动电压传递给所述显示模块301。
其中，所述运算控制模块303的结构如图4所示，分为数据接收单元401、存储单元402、计算单元403和控制输出单元404。所述数据接收单元401用于接收由光学测量模块测得的显示模块亮度及色度坐标。所述存储单元402用于存储当前测量值以及多组不同驱动电压下所述显示装置的亮度值。所述计算单元403主要有：参考用户输入得最大亮度Lmax和gamma系数，获得各个灰阶所需的目标亮度值；对所述显示装置的当前驱动电压进行调整，使显示画面的色度达到目标色度坐标，即用户所输入的白点坐标(Xwt，Ywt)；计算目标驱动电压，使所述显示装置的亮度满足目标亮度。所述控制输出单元404用于控制所述显示装置需显示的灰阶，并输出驱动电压对应的寄存器值。所述光学测量模块测量的各单色画面的最大亮度中的任意一项大于或等于三色的目标亮度值时，所述系统进行白平衡调节。
相较于现有的AMOLED显示装置的亮度和色度自动调整方法及系统，本发明所提供的一种AMOLED显示装置的亮度和色度自动调整方法和系统，无需建立单色光亮度随驱动电压变化的查找表，减少因制程差异带来的影响，利用OLED驱动及发光特性，使白平衡 和Gamma调整算法精准并快速，使驱动电压快速趋近目标值，减少程序的计算量，加快对显示装置的亮度和色度进行自动调整的速度，从而节省OLED显示装置的生产调试时间，进而提升了产能。
综上所述，虽然本发明已以优选实施例揭露如上，但上述优选实施例并非用以限制本发明，本领域的普通技术人员，在不脱离本发明的精神和范围内，均可作各种更动与润饰，因此本发明的保护范围以权利要求界定的范围为准。

Claims (12)

  1. 一种AMOLED显示装置的亮度与色度自动调整方法，其包括以下步骤：
    步骤S 101、光学测量模块对显示模块进行光学测量，得到所述显示模块各单色画面的最大亮度LRm、LGm、LBm及色度坐标(xr，yr)、(xg，yg)、(xb，yb)；
    步骤S102、所述光学测量模块将测量的所述最大亮度和所述色度坐标传递给运算控制模块；
    步骤S103、所述运算控制模块接收所述最大亮度与所述色度坐标的信息，并通过所述最大亮度和gamma曲线计算得到各灰阶的目标亮度值，调整当前驱动电压以达到目标色度坐标，再计算目标驱动电压，得到使所述显示模块的亮度满足目标亮度的驱动电压；所述运算控制模块控制所述显示模块所需显示的灰阶，并输出所述驱动电压对应的寄存器值；
    步骤S104、所述运算控制模块控制显示驱动模块，所述显示驱动模块将所需的所述驱动电压传递给所述显示模块，以对当前驱动电压进行自动调整。
  2. 根据权利要求1所述的自动调整方法，其中，所述步骤S103具体包括以下步骤：
    步骤S1031、根据测得待调显示模块各单色画面的最大亮度及色度坐标，获得当显示画面满足白画面目标色度坐标时所对应的R/G/B驱动电压值VR，VG，VB；
    步骤S1032、根据OLED器件特性，控制R/G/B驱动电压，以使所述显示模块所显示的画面维持白画面；
    步骤S1033、结合最小亮度Lmin得到一组不同驱动电压的亮度值Li，每个Li分别对应一组驱动电压VRi，VGi，VBi；
    步骤S1034、根据白画面最大亮度Lmax及目标gamma曲线，计算任一灰阶x的亮度值Lx；
    步骤S1035、将一灰阶x的亮度值Lx在预先测得的一组驱动电压的亮度值Li中差值，计算得到对应的三色驱动电压VRx，VGx，VBx。
  3. 根据权利要求2所述的自动调整方法，其中，所述三色驱动电压的关系为：
    (V R255-VDD)：(V G255-VDD)：(V B255-VDD)＝(V R128-VDD)：(V G128-VDD)：(V B128-VDD)
    即在色度坐标保持不变的情况下，三色驱动电压(Vx-VDD)的比例保持不变，以此获得不同亮度白画面下三色驱动电压的关系。
  4. 根据权利要求2所述的自动调整方法，其中，所述步骤S104具体包括：
    所述显示驱动模块接受到信息，输出VRx，VGx，VBx，并在此基础上对驱动电压进行微调，使所述显示装置满足目标白色画面的色度和gamma曲线。
  5. 一种AMOLED显示装置的亮度与色度自动调整系统，其包括：
    显示模块，用以显示画面信息；
    光学测量模块，用以对显示模块进行光学测量；
    运算控制模块，用以计算得到各灰阶的目标亮度及色度值，以及显示模块的亮度和色度与目标最接近的驱动电压；
    显示驱动模块，用以将所需的所述驱动电压传递给所述显示模块；
    其中，所述运算控制模块包括计算单元，所述计算单元用以根据最大亮度Lmax和gamma系数，获得各个灰阶所需的目标亮度值；且用以对所述显示装置的当前驱动电压进行调整，以及用以计算目标驱动电压，以使所述显示装置的亮度满足目标亮度；所述运算控制模块还包括数据接收单元，所述数据接收单元用于接收由所述光学测量模块测得的所述显示模块亮度及色度坐标。
  6. 根据权利要求5所述的自动调整系统，其中，所述光学测量模块测量的各单色画面的最大亮度中的任意一项大于或等于三色的目标亮度值时，所述运算控制模块与所述显示驱动模块进行白平衡调节。
  7. 根据权利要求5所述的自动调整系统，其中，所述运算控制模块还包括存储单元，所述存储单元用于存储当前测量值以及多组不同驱动电压下所述显示装置的亮度值。
  8. 根据权利要求5所述的自动调整系统，其中，所述运算控制模块还包括控制输出单元，所述控制输出单元用于控制所述显示装置需显示的灰阶，并用以输出驱动电压对应的寄存器值。
  9. 一种AMOLED显示装置的亮度与色度自动调整方法，其包括以下步骤：
    步骤S101、光学测量模块对显示模块进行光学测量，得到所述显示模块各单色画面的最大亮度LRm、LGm、LBm及色度坐标(xr，yr)、(xg，yg)、(xb，yb)；
    步骤S102、所述光学测量模块将测量的所述最大亮度和所述色度坐标传递给运算控制模块；
    步骤S103、所述运算控制模块接收所述最大亮度与所述色度坐标的信息，并通过所述最大亮度和gamma曲线计算得到各灰阶的目标亮度值，调整当前驱动电压以达到目标色度坐标，再计算目标驱动电压，得到使所述显示模块的亮度满足目标亮度的驱动电压；
    步骤S104、所述运算控制模块控制显示驱动模块，所述显示驱动模块将所需的所述驱动电压传递给所述显示模块，以对当前驱动电压进行自动调整。
  10. 根据权利要求9所述的自动调整方法，其中，所述步骤S103具体包括以下步骤：
    步骤S1031、根据测得待调显示模块各单色画面的最大亮度及色度坐标，获得当显示画面满足白画面目标色度坐标时所对应的R/G/B驱动电压值VR，VG，VB；
    步骤S1032、根据OLED器件特性，控制R/G/B驱动电压，以使所述显示模块所显示的画面维持白画面；
    步骤S1033、结合最小亮度Lmin得到一组不同驱动电压的亮度值Li，每个Li分别对应一组驱动电压VRi，VGi，VBi；
    步骤S1034、根据白画面最大亮度Lmax及目标gamma曲线， 计算任一灰阶x的亮度值Lx；
    步骤S1035、将一灰阶x的亮度值Lx在预先测得的一组驱动电压的亮度值Li中差值，计算得到对应的三色驱动电压VRx，VGx，VBx。
  11. 根据权利要求10所述的自动调整方法，其中，所述三色驱动电压的关系为：
    (V R255-VDD)：(V G255-VDD)：(V B255-VDD)＝(V R128-VDD)：(V G128-VDD)：(V B128-VDD)
    即在色度坐标保持不变的情况下，三色驱动电压(Vx-VDD)的比例保持不变，以此获得不同亮度白画面下三色驱动电压的关系。
  12. 根据权利要求10所述的自动调整方法，其中，所述步骤S104具体包括：
    所述显示驱动模块接受到信息，输出VRx，VGx，VBx，并在此基础上对驱动电压进行微调，使所述显示装置满足目标白色画面的色度和gamma曲线。
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