WO2019061605A1 - 一种oled电压补偿方法及补偿电路、显示装置 - Google Patents

一种oled电压补偿方法及补偿电路、显示装置 Download PDF

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WO2019061605A1
WO2019061605A1 PCT/CN2017/107182 CN2017107182W WO2019061605A1 WO 2019061605 A1 WO2019061605 A1 WO 2019061605A1 CN 2017107182 W CN2017107182 W CN 2017107182W WO 2019061605 A1 WO2019061605 A1 WO 2019061605A1
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voltage
driving voltage
compensation
code
encoding
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PCT/CN2017/107182
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English (en)
French (fr)
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曾玉超
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 US15/735,881 priority Critical patent/US10657896B2/en
Publication of WO2019061605A1 publication Critical patent/WO2019061605A1/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
    • G09G3/3258—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 with pixel circuitry controlling the voltage across the light-emitting element
    • 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
    • G09G3/3233—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 with pixel circuitry controlling the current through the light-emitting element
    • G09G3/3241—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 with pixel circuitry controlling the current through the light-emitting element the current through the light-emitting element being set using a data current provided by the data driver, e.g. by using a two-transistor current mirror
    • 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
    • G09G2320/06—Adjustment of display parameters
    • G09G2320/0673—Adjustment of display parameters for control of gamma adjustment, e.g. selecting another gamma curve
    • 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
    • G09G2330/021—Power management, e.g. power saving
    • 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 present invention relates to the field of display technologies, and in particular, to an OLED voltage compensation method, a compensation circuit, and a display device.
  • the Organic Light-Emitting Diode (OLED) display panel has the advantages of self-illumination and large viewing angle, and has been widely used.
  • the brightness of the image used for the OLED display panel corresponds to a non-linear relationship between the input signals. Therefore, before the input signal drives the display of the OLED display panel, the input signal must be compensated to improve the image display effect of the OLED display panel.
  • the "grayscale data-drive voltage” and “drive voltage-grayscale data” are generally performed by linear interpolation of fixed grayscale corresponding binding points. Conversion, but the linear interpolation method is used to obtain a deviation between the Gamma curve and the target Gamma curve, resulting in a certain error in the "gray data-drive voltage” and “drive voltage-grayscale data” conversion, and the OLED voltage compensation accuracy is not high.
  • the technical problem to be solved by the present invention is to provide an OLED voltage compensation method, a compensation circuit and a display device to improve the OLED voltage compensation accuracy and improve the display effect of the OLED display panel.
  • a technical solution adopted by the present invention is to provide an OLED voltage compensation circuit for compensating for a driving voltage of an OLED display panel, the voltage compensation circuit comprising: a brightness detecting unit for detecting and Acquiring a brightness value of each pixel of the OLED display panel; the encoding unit is configured to convert the brightness value obtained by the brightness detecting unit into a driving voltage code according to a gamma curve; and a compensation unit according to the coding unit
  • the driving voltage code acquires the compensation data, and compensates the driving voltage encoding value according to the compensation data to drive the OLED display panel display according to the compensated driving voltage encoding; wherein the compensation data includes a voltage compensation code, And the coding step size of the voltage compensation code is the same as the coding step size of the driving voltage coding.
  • a voltage compensation method for compensating for a driving voltage of the OLED display panel comprising: detecting and acquiring a brightness value of each pixel of the OLED display panel; converting the brightness value into a driving voltage according to a Gamma curve Encoding; acquiring compensation data according to the driving voltage encoding, and compensating the driving voltage encoding according to the compensation data to drive the OLED display panel display according to the compensated driving voltage encoding.
  • the display device includes the OLED voltage compensation circuit, the driving circuit and the OLED display panel, wherein the OLED voltage compensation circuit compensates a driving voltage of the OLED display panel, and the driving circuit compensates according to the OLED voltage compensation circuit.
  • the driving voltage code drives the OLED display panel to operate.
  • the OLED voltage compensation method is used to compensate the driving voltage of the OLED display panel.
  • the method first detects and acquires the brightness value of each pixel of the OLED display panel.
  • the method of the present invention is different from the prior art. And converting the brightness value into a voltage according to the Gamma curve; then obtaining voltage compensation data according to the voltage, and compensating the voltage according to the voltage compensation data to drive the OLED display panel display according to the compensated voltage.
  • the OLED voltage compensation method of the embodiment converts the luminance value of each pixel into a corresponding voltage code according to the gamma curve, and after the compensation data is compensated, directly drives the OLED display panel display without the need to encode the compensated voltage. It is converted into a gray value, so the error caused by the "voltage-gray scale" conversion can be reduced, thereby improving the accuracy of the OLED voltage compensation and improving the display effect of the OLED display panel.
  • 1 is a circuit diagram of a pixel of an OLED display panel
  • FIG. 2 is a schematic diagram of OLED voltage compensation by linear interpolation
  • FIG. 3 is a schematic structural view of a first embodiment of an OLED voltage compensation circuit according to the present invention.
  • FIG. 4 is a schematic flow chart of a first embodiment of an OLED voltage compensation method according to the present invention.
  • FIG. 5 is a schematic structural diagram of a Gamma curve generating electric unit of the embodiment of FIG. 3; FIG.
  • FIG. 6 is a schematic flow chart of a method for generating a Gamma curve of the embodiment of FIG. 3;
  • FIG. 7A is a schematic diagram showing a linear relationship between a plurality of state voltages and driving voltage codes in the embodiment of FIG. 6;
  • FIG. 7B is a driving voltage code corresponding to a plurality of state point voltages of the embodiment of FIG. 6 and brightness corresponding thereto a schematic diagram of the relationship of values;
  • FIG. 7C is a schematic diagram of a curve after the driving voltage encoding bit width is expanded in the embodiment of FIG. 7B;
  • FIG. 8A is a schematic diagram of encoding of a voltage compensation code of the embodiment of FIG. 6;
  • FIG. 8B is another schematic diagram of the driving voltage encoding bit width extension of the embodiment of FIG. 7B;
  • FIG. 9 is a schematic flow chart of a second embodiment of an OLED voltage compensation method according to the present invention.
  • FIG. 10 is a schematic structural view of a second embodiment of an OLED voltage compensation circuit according to the present invention.
  • Figure 11 is a schematic view showing the structure of an embodiment of the display device of the present invention.
  • the difference between the threshold voltage Vth of the driving TFT 102, the luminance scale coefficient k, and the difference in the luminous efficiency ⁇ of the OLED causes the same inter-pixel control current in the case of the same V g and V s .
  • I ds There is a difference in I ds , and the difference in brightness L of the OLED is mainly reflected in the Vth and the brightness-related proportional coefficient of the driving TFT 102. Therefore, in order to reduce the difference in the OLED brightness ⁇ *k of each pixel, the uniformity of the OLED brightness L can be compensated by the voltage compensation of the driving voltage and the compensation of the luminance scale factor.
  • the gray scale data of the OLED display panel is converted into “grayscale data-drive voltage” and “drive voltage-grayscale data” by linear interpolation method of fixed gray scale corresponding to the junction voltage GMA1-GMA9, and the compensation is performed.
  • the data is stored in voltage form. Due to the linear interpolation method or the "grayscale data-drive voltage” curve and the “drive voltage-grayscale data” curve, that is, the Gamma curve has a certain deviation from the target Gamma curve, and the gray-scale data error after two Gamma curve conversions will be Further expansion, therefore, the compensation accuracy of voltage compensation in this way is not high.
  • the present invention provides an OLED voltage compensation circuit.
  • the OLED voltage compensation circuit 301 of the present embodiment includes a brightness detection unit 302, an encoding unit 303, a storage unit 304, a compensation unit 305, and FRC processing. Unit 306.
  • the embodiment also provides an OLED voltage compensation method.
  • the OLED voltage compensation method of the embodiment uses the OLED voltage compensation circuit 301 of the embodiment of FIG. 3 to compensate the driving voltage of the OLED display panel, thereby improving the OLED voltage compensation. Accuracy, improve the display of OLED display panels.
  • OLED voltage compensation method of this embodiment Includes the following steps:
  • S401 Detect and acquire a brightness value of each pixel of the OLED display panel.
  • the brightness detection unit 302 detects and acquires the brightness value of each pixel of the OLED display panel.
  • Each pixel described in this embodiment refers to each sub-pixel.
  • the OLED voltage compensation of this embodiment is applicable to the OLED voltage compensation of each sub-pixel.
  • S403 Acquire compensation data according to driving voltage encoding, and compensate driving voltage encoding according to the compensation data to drive the OLED display panel display according to the compensated driving voltage encoding.
  • the compensation unit 305 separately obtains the compensation data and the driving voltage code from the storage unit 304 and the encoding unit 303, and compensates the voltage encoding according to the compensation data to drive the OLED display panel display according to the compensated driving voltage encoding.
  • the OLED voltage compensation method of the embodiment converts the brightness value of the pixel into a corresponding voltage code according to the Gamma curve, and directly compensates the display of the OLED display panel after compensation data compensation, without the need to encode the compensated voltage. It is converted into a gray value, so the error caused by the "voltage-gray scale" conversion can be reduced, thereby improving the accuracy of the OLED voltage compensation and improving the display effect of the OLED display panel.
  • the gamma curve coordinate of the embodiment includes the driving voltage code set by the horizontal axis and the brightness value set by the vertical axis, as shown in FIG. 5 and FIG. 6,
  • FIG. 5 is a schematic structural diagram of the gamma curve generating unit of the embodiment of FIG. 3; 6 is a schematic flow chart of the Gamma curve generation method of the embodiment of FIG. 3.
  • the gamma curve generation circuit 501 of the present embodiment includes a luminance detection sub-unit 502, a main control sub-unit 503, a gamma curve generation sub-unit 504, a first timing control sub-unit 505, and a second timing sub-unit 506.
  • the Gamma curve generation method of this embodiment includes the following steps:
  • S601 Acquire a plurality of tie point voltages, and linearly correspond to the plurality of tie point voltages and the driving voltage code.
  • the main control subunit 503 acquires a plurality of tie point voltages, specifically, a plurality of tie point voltages GMA1-GMA9, and linearly corresponds the tie point voltages GMA1-GMA9 with the drive voltage coding, as shown in FIG. 7A.
  • the pinch point voltages GMA1-GMA9 are linearly matched with the driving voltage code, so that the encoding step of the driving voltage encoding is a constant value.
  • the encoding step size is (GMA9- GMA1)/1024.
  • S602 Acquire a brightness value of a pixel corresponding to a driving voltage of the OLED display panel 507 when each of the binding voltages GMA1-GMA9.
  • the first timing control sub-unit 505 transmits the plurality of binding point voltages GMA1-GMA9 acquired by the main control sub-unit 503 to the OLED display panel 507 for display, and the brightness detecting sub-unit 502 obtains the OLED display panel respectively.
  • the brightness value driven by the voltage of the binding point GMA1-GMA9 is transmitted to the main control sub-unit 503, and the main control sub-unit 503 can obtain the driving voltage code corresponding to the plurality of binding point voltages GMA1-GMA9 and the brightness corresponding thereto.
  • the relationship between the values is as shown in Fig. 7B.
  • S603 The bit width of the driving voltage encoding is extended by linear interpolation.
  • the main control sub-unit 503 expands the bit width of the above-described driving voltage encoding by linear interpolation. For example, if the 10-bit bit width is extended to a 12-bit bit width, as shown in FIG. 7C, the number of luminance values encoded by the wide expansion and the driving voltage encoding is expanded from 1024 to 4096, which can further improve the luminance value and driving. The corresponding accuracy of the voltage coding improves the accuracy of the Gamma curve.
  • the bit width of the driving voltage encoding can be further expanded according to the specific requirements for the driving voltage compensation accuracy.
  • S604 Generate a Gamma curve according to the relationship between the luminance value and the driving voltage encoding.
  • the gamma curve of this embodiment represents the luminance value and the driving voltage encoding.
  • the voltage-gray value conversion is not required, and the OLED display panel 507 is directly driven by the driving voltage encoding to display, which can reduce " The error caused by the voltage-gray conversion can improve the accuracy of the OLED voltage compensation and improve the display effect of the OLED display panel.
  • the compensation data of the embodiment is voltage compensation coding
  • obtaining compensation data according to the driving voltage coding includes: acquiring voltage compensation code corresponding to the compensation data according to the driving voltage coding, wherein the coding step of the voltage compensation coding and the coding of the driving voltage coding The steps are the same.
  • the compensated driving voltage encoding value is directly driven to the OLED display panel display, and when the driving voltage encoding is compensated, in order to improve the compensation efficiency, the driving voltage is encoded by the voltage compensation encoding. Compensation is performed, and to improve the compensation accuracy, the encoding step size of the voltage compensation code is the same as the encoding step size of the driving voltage encoding. As shown in FIG. 8A, the coding range of the voltage compensation code is -Vref2 to Vref2, and the step size is The bit width is m bit.
  • the encoding step size of the voltage compensation code is the same as the encoding step size of the driving voltage encoding, and has: which is:
  • a Gamma curve is generated by a method in which the target luminance is equal to the temporal luminance, assuming that the Gamma curve corresponds to the driving voltage encoding range [CD1, CD2], as shown in FIG. 8B; at the same time, 2 m-1 ⁇ CD1 and 2 m are satisfied.
  • the voltage compensation of the pixel will not overflow, and both the low luminance value and the high luminance value can be completely compensated.
  • the compensation data may also include a brightness correlation scale factor of the OLED.
  • the voltage compensation code corresponding to the compensation data may be obtained according to the driving voltage encoding to compensate the driving voltage encoding by using the voltage compensation encoding, wherein the encoding step size of the voltage compensation encoding is the same as the encoding step length of the driving voltage encoding.
  • the gap voltage GMA1-GMA9 can be designed to provide a certain margin for voltage compensation, thereby improving the compensation range of low brightness and high brightness of the pixel.
  • the present invention further provides the OLED voltage compensation method of the second embodiment.
  • the OLED voltage compensation method disclosed in this embodiment is described on the basis of the OLED voltage compensation method of the above embodiment.
  • Step S901 of the present embodiment replaces step S403 of the above embodiment.
  • S901 Acquire compensation data according to voltage coding, and compensate voltage coding according to the compensation data.
  • S902 Perform frame rate conversion (FRC) processing on the compensated driving voltage code, so that the FRC-processed driving voltage code drives the OLED display panel display.
  • FRC frame rate conversion
  • the FRC processing unit 306 acquires the compensated driving voltage code from the compensation unit 304, and performs FRC processing on the compensated driving voltage to cause the FRC-processed driving voltage code to drive the OLED display panel 507 to display.
  • the FRC process inserts the calculated new image data between the image data of the original signal source, which can improve the accuracy of the driving voltage compensation and make the OLED display panel display smoother.
  • the present invention also provides an OLED voltage compensation circuit.
  • the OLED voltage compensation circuit 301 of the present embodiment compensates the driving voltage of the OLED display panel by the method of the above embodiment.
  • the OLED voltage compensation circuit 301 of this embodiment includes a brightness detection unit 302, an encoding unit 303, a storage unit 304, a compensation unit 305, and an FRC processing unit 306.
  • the embodiment further provides an OLED voltage compensation method, wherein the brightness detecting unit 302 is configured to detect and acquire the brightness value of each pixel of the OLED display panel; and the encoding unit 303 is configured to use the brightness value obtained by the brightness detecting unit 302 according to the gamma curve.
  • the storage unit 304 is configured to obtain compensation data according to the driving voltage encoding of the encoding unit 303, and compensate the driving voltage encoding value according to the compensation data to drive the driving according to the compensated driving voltage encoding.
  • OLED display panel display OLED display panel display.
  • the encoding unit 303 of the OLED voltage compensation circuit 301 of the present embodiment converts the luminance values of the pixels into corresponding voltage codes according to the Gamma curve, and directly compensates the display of the OLED display panel after compensation data compensation, without further Convert the compensated voltage code into a gray value, because This can reduce the error caused by the "voltage-grayscale" conversion, thereby improving the accuracy of the OLED voltage compensation and improving the display effect of the OLED display panel.
  • the OLED voltage compensation circuit 301 of the embodiment further includes an FRC processing unit 306.
  • the FRC processing unit 306 obtains the compensated driving voltage code from the compensation unit 304, and performs FRC processing on the compensated driving voltage, so that the FRC-processed driving voltage code drives the OLED display panel display, thereby improving the accuracy of the driving voltage compensation. And can make the OLED display panel display more smooth.
  • the present invention further provides the OLED voltage compensation circuit of the second embodiment.
  • the OLED voltage compensation circuit disclosed in this embodiment is described on the basis of the OLED voltage compensation circuit of the above embodiment.
  • the OLED voltage compensation circuit 1001 of the present embodiment further includes a Gamma curve generating unit 1002, which is configured to acquire a plurality of tie voltages and linearly correspond to a plurality of tie voltages and drive voltage codes.
  • the Gamma curve generating unit 1002 obtains the brightness value corresponding to the driving voltage of the OLED display panel as the voltage of each binding point, and expands the bit width of the driving voltage encoding by linear interpolation; and according to the relationship between the brightness value and the driving voltage encoding
  • the gamma curve is generated; the encoding unit 303 converts the luminance value acquired by the luminance detecting unit 302 into driving voltage encoding according to the gamma curve generated by the gamma curve generating unit 1002, so that the compensating unit 304 acquires the voltage compensation data according to the driving voltage encoding.
  • the gamma curve generating unit 1002 of this embodiment can expand the bit width of the driving voltage encoding, and can improve the accuracy of the gamma curve.
  • the brightness detecting unit 302 and the brightness detecting sub-unit 502 may be the same circuit.
  • the present invention also provides a display device.
  • the display device 1101 of the present embodiment includes an OLED voltage compensation circuit 1102, a driving circuit 1103, and an OLED display panel 1104.
  • the driving voltage of the OLED voltage compensation circuit 1102 to the OLED display panel 1104 is shown.
  • the driving circuit 1103 drives the OLED display panel 1104 to operate according to the driving voltage code compensated by the OLED voltage compensation circuit 1102.
  • the structure and compensation principle of the OLED voltage compensation circuit 1102 are described in detail in the above embodiments, and are not described herein.
  • the OLED voltage compensation circuit 1102 of the present embodiment converts the luminance values of the pixels into corresponding voltage codes according to the gamma curve, and after the compensation data is compensated, directly drives the OLED display panel 1104 to display, without the need to compensate.
  • the subsequent voltage code is converted into a gray value, so that the error caused by the "voltage-gray scale" conversion can be reduced, thereby improving the accuracy of the OLED voltage compensation and improving the display effect of the OLED display panel 1104.

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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OLED电压补偿方法及补偿电路、显示装置。OLED电压补偿方法包括检测并获取OLED显示面板的各像素的亮度值（S401）；根据Gamma曲线将亮度值转换成电压编码（S402）；根据电压编码获取补偿数据，并根据补偿数据对电压编码进行补偿，以根据补偿后的电压编码驱动OLED显示面板显示（S403），通过这种方式，能够提高OLED电压补偿精度，提高OLED显示面板的显示效果。

Description

一种OLED电压补偿方法及补偿电路、显示装置 【技术领域】
本发明涉及显示技术领域，特别是涉及一种OLED电压补偿方法及补偿电路、显示装置。
【背景技术】
有机发光二极管(Organic Light-Emitting Diode，OLED)显示面板具有自发光、可视角度大等优点，现已得到了广泛的应用。用于OLED显示面板的图像亮度相应于输入信号之间是非线性关系。因此，在输入信号驱动OLED显示面板显示之前，必须对输入信号进行补偿，以提高OLED显示面板的图像显示效果。
本发明的发明人在长期的研发中发现，在目前现有技术中，一般采用固定灰阶对应绑定点的线性插值方式进行“灰阶数据-驱动电压”及“驱动电压-灰阶数据”转换，但利用线性插值方式获得Gamma曲线与目标Gamma曲线存在再定偏差，导致“灰阶数据-驱动电压”及“驱动电压-灰阶数据”转换存在一定误差，对OLED电压补偿精度不高。
【发明内容】
本发明主要解决的技术问题是提供一种OLED电压补偿方法及补偿电路、显示装置，以提高OLED电压补偿精度，提高OLED显示面板的显示效果。
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OLED电压补偿电路，用于对OLED显示面板的驱动电压进行补偿，所述电压补偿电路包括：亮度检测单元，用于检测并获取所述OLED显示面板的各像素的亮度值；编码单元，用于根据Gamma曲线将所述亮度检测单元获取的所述亮度值转换成驱动电压编码；补偿单元，根据所述编码单元的所述驱动电压编码获取补偿数据，并根据所述补偿数据对所述驱动电压编码值进行补偿，以根据补偿后的驱动电压编码驱动所述OLED显示面板显示；其中，所述补偿数据包括电压补偿编码，且所述电压补偿编码的编码步长与所述驱动电压编码的编码步长相同。
为解决上述技术问题，本发明采用的另一个技术方案是：提供一种OLED 电压补偿方法，用于对OLED显示面板的驱动电压进行补偿，所述电压补偿方法包括：检测并获取所述OLED显示面板的各像素的亮度值；根据Gamma曲线将所述亮度值转换成驱动电压编码；根据所述驱动电压编码获取补偿数据，并根据所述补偿数据对所述驱动电压编码进行补偿，以根据补偿后的驱动电压编码驱动所述OLED显示面板显示。
为解决上述技术问题，本发明采用的又一个技术方案是：提供一种显示装置。所述显示装置包括上述OLED电压补偿电路、驱动电路及OLED显示面板，所述OLED电压补偿电路对所述OLED显示面板的驱动电压进行补偿，所述驱动电路根据所述OLED电压补偿电路补偿后的驱动电压编码驱动所述OLED显示面板工作。
本发明实施例的有益效果是：区别于现有技术，本发明实施例OLED电压补偿方法用于对OLED显示面板的驱动电压进行补偿，该方法先检测并获取OLED显示面板的各像素的亮度值，并根据Gamma曲线将亮度值转换成电压；然后根据电压获取电压补偿数据，并根据电压补偿数据对电压进行补偿，以根据补偿后的电压驱动OLED显示面板显示。通过这种方式，本实施例OLED电压补偿方法根据Gamma曲线将个像素的亮度值转换成对应的电压编码，经补偿数据补偿后，直接驱动OLED显示面板显示，而无需再将补偿后的电压编码转换成灰度值，因此能够减少“电压-灰度”转化带来的误差，从而能够提高OLED电压补偿的精度，提高OLED显示面板的显示效果。
【附图说明】
图1是OLED显示面板的像素的电路示意图；
图2是采用线性插值方式进行OLED电压补偿的示意图；
图3是本发明OLED电压补偿电路第一实施例的结构示意图；
图4是本发明OLED电压补偿方法第一实施例的流程示意图；
图5是图3实施例Gamma曲线生成电单元的结构示意图；
图6是图3实施例Gamma曲线生成方法的流程示意图；
图7A是图6实施例的多个邦点电压与驱动电压编码线性关系的曲线示意图；
图7B是图6实施例的多个邦点电压对应的驱动电压编码及与其对应的亮度 值关系的曲线示意图；
图7C是图7B实施例进行驱动电压编码位宽扩展后的曲线示意图；
图8A是图6实施例的电压补偿编码的编码示意图；
图8B是图7B实施例进行驱动电压编码位宽扩展后的另一曲线示意图；
图9是本发明OLED电压补偿方法第二实施例的流程示意图；
图10是本发明OLED电压补偿电路第二实施例的结构示意图；
图11本发明显示装置一实施例的结构示意图。
【具体实施方式】
如图1所示的OLED显示面板的像素电路101，OLED的亮度L与预期电流IOLED成正比，有L＝η*IOLED，η为OLED的发光效率；驱动TFT102工作在饱和区，通过其栅极电压Vg控制电流Ids＝k(Vg-Vs-Vth)2，OLED与驱动TFT102串联，因此，Ids＝IOLED。可知，对于每个像素而言，驱动TFT102的阈值电压Vth、亮度比例系数k的差异性，以及OLED的发光效率η的差异性，会导致相同Vg、Vs的情况下，像素间控制电流Ids会存在差异，OLED亮度L的差异主要体现在驱动TFT102的Vth及亮度相关比例系数。因此，为减小各像素的OLED亮度η*k的差异，可以通过驱动电压的电压补偿及亮度比例系数的补偿来对OLED亮度L的均匀性进行补偿。
如图2所示，采用固定灰阶对应绑点电压GMA1-GMA9的线性插值方式对OLED显示面板的灰阶数据进行“灰阶数据-驱动电压”和“驱动电压-灰阶数据”转换，补偿数据是以电压形式存储。因线性插值方式或的“灰阶数据-驱动电压”曲线及“驱动电压-灰阶数据”曲线，即Gamma曲线与目标Gamma曲线存在一定偏差，经两次Gamma曲线转换后的灰阶数据误差会进一步扩大，因此，这种方式的电压补偿的补偿精度不高。
针对上述技术问题，本发明提出了一种OLED电压补偿电路，如图3所示，本实施例OLED电压补偿电路301包括亮度检测单元302、编码单元303、存储单元304、补偿单元305及FRC处理单元306。本实施例还提出一种OLED电压补偿方法，如图4所示，本实施例OLED电压补偿方法采用图3实施例OLED电压补偿电路301对OLED显示面板的驱动电压进行补偿，能够提高OLED电压补偿精度，提高OLED显示面板的显示效果。本实施例OLED电压补偿方法 包括以下步骤：
S401：检测并获取OLED显示面板的各像素的亮度值。
通过亮度检测单元302检测并获取OLED显示面板的各像素的亮度值，本实施例所述的各像素是指各子像素，本实施例的OLED电压补偿适用于各子像素的OLED电压补偿。
S402：根据Gamma曲线将亮度值转换成电压编码。
S403：根据驱动电压编码获取补偿数据，并根据补偿数据对驱动电压编码进行补偿，以根据补偿后的驱动电压编码驱动OLED显示面板显示。
补偿单元305从存储单元304及编码单元303中分别获取补偿数据及驱动电压编码，并对根据补偿数据对电压编码进行补偿，以根据补偿后的驱动电压编码驱动OLED显示面板显示。
区别于现有技术，本实施例OLED电压补偿方法根据Gamma曲线将像素的亮度值转换成对应的电压编码，经补偿数据补偿后，直接驱动OLED显示面板显示，而无需再将补偿后的电压编码转换成灰度值，因此能够减少“电压-灰度”转化带来的误差，从而能够提高OLED电压补偿的精度，提高OLED显示面板的显示效果。
其中，本实施例的Gamma曲线坐标包括横轴设置的驱动电压编码及纵轴设置的亮度值，如图5及图6所示，图5是图3实施例Gamma曲线生成单元的结构示意图；图6是图3实施例的Gamma曲线生成方法的流程示意图。本实施例Gamma曲线的生成电路501包括亮度检测子单元502、主控子单元503、Gamma曲线生成子单元504、第一时序控制子单元505及第二定时序制子单元506。本实施例Gamma曲线生成方法包括以下步骤：
S601：获取多个绑点电压，并将多个绑点电压与驱动电压编码进行线性对应。
主控子单元503获取多个绑点电压，具体地，多个绑点电压GMA1-GMA9，并将绑点电压GMA1-GMA9与驱动电压编码进行线性对应，如图7A所示。
本实施例将绑点电压GMA1-GMA9与驱动电压编码进行线性对应，可以使得驱动电压编码的编码步长为恒定值，例如，若驱动电压编码为10bit的编码，编码步长则为(GMA9-GMA1)/1024。
S602：获取OLED显示面板507的驱动电压为各绑点电压GMA1-GMA9时对应的像素的亮度值。
具体地，第一时序控制子单元505将主控子单元503获取的多个绑点电压GMA1-GMA9分别传输给OLED显示面板507进行显示，同时，亮度检测子单元502获取OLED显示面板分别在多个绑点电压GMA1-GMA9驱动下的亮度值，并将亮度值传输给主控子单元503，主控子单元503能够获取多个绑点电压GMA1-GMA9对应的驱动电压编码及与其对应的亮度值之间的关系，如图7B所示。
S603：采用线性插值方式对驱动电压编码的位宽进行扩展。
主控子单元503采用线性插值方式对上述驱动电压编码的位宽进行扩展。例如，若将上述10bit位宽扩展为12bit位宽，如图7C所示，进行编码为宽扩展后的亮度值与驱动电压编码对应的数量由1024个扩展到了4096，能够进一步提高亮度值与驱动电压编码的对应精度，提高Gamma曲线的精度。当然，可以根据对驱动电压补偿精度的具体要求来对驱动电压编码的位宽进行其它的扩展。
S604：根据亮度值与驱动电压编码的关系，生成Gamma曲线。
本实施例的Gamma曲线表示的是亮度值与驱动电压编码，在后续的数据处理中，不需要进行电压-灰度值的转换，直接用驱动电压编码驱动OLED显示面板507进行显示，能够减少“电压-灰度”转化带来的误差，从而能够提高OLED电压补偿的精度，提高OLED显示面板的显示效果。
其中，本实施例的补偿数据为电压补偿编码，根据驱动电压编码获取补偿数据包括：根据驱动电压编码获取补偿数据对应的电压补偿编码，其中，电压补偿编码的编码步长与驱动电压编码的编码步长相同。
从上述分析可以，为提高OLED电压补偿的精度，将补偿后的驱动电压编码值直接驱动OLED显示面板显示，在对驱动电压编码进行补偿时，为提高补偿效率，采用电压补偿编码对驱动电压编码进行补偿，且为提高补偿精度，电压补偿编码的编码步长与驱动电压编码的编码步长相同。如图8A所示，电压补偿编码的编码范围是-Vref2～Vref2，步长是
Figure PCTCN2017107182-appb-000001
位宽为m bit。电压补偿编码的编码步长与驱动电压编码的编码步长相同，有：
Figure PCTCN2017107182-appb-000002
即：
Figure PCTCN2017107182-appb-000003
本实施例通过目标亮度与时间亮度相等的方法生成Gamma曲线，假设Gamma曲线对应驱动电压编码的范围是[CD1，CD2]，如图8B所示；在同时满 足2m-1＜CD1和2m-1＜(2n-CD2)的情况下，像素的电压补偿将不会溢出，低亮度值和高亮度值均能完全补偿。
当然，在其它实施例中。补偿数据还可以包括OLED的亮度相关比例系数。可以根据驱动电压编码获取补偿数据对应的电压补偿编码，以利用电压补偿编码对驱动电压编码进行补偿，其中，电压补偿编码的编码步长与驱动电压编码的编码步长相同。
本实施例还可以通过设计绑点电压GMA1-GMA9驱为电压补偿提供一定裕量，提高像素的低亮度与高亮度的补偿范围。
本发明进一步提供第二实施例的OLED电压补偿方法，本实施例所揭示的OLED电压补偿方法在上述实施例的OLED电压补偿方法的基础上进行描述。本实施例的步骤S901-替代上述实施例的步骤S403。
S901：根据电压编码获取补偿数据，并根据补偿数据对电压编码进行补偿。
S902：对补偿后的驱动电压编码进行帧频控制(Frame Rate Conversion，FRC)处理，以使经FRC处理后的驱动电压编码驱动OLED显示面板显示。
FRC处理单元306从补偿单元304获取补偿后的驱动电压编码，并对补偿后的驱动电压进行FRC处理，以使经FRC处理后的驱动电压编码驱动OLED显示面板507显示。
FRC处理是在原始信号源的图像数据之间，插入经过计算生成的新的图像数据，可以提高驱动电压补偿的精度，且能使OLED显示面板显示更流畅。
本发明还提出一种OLED电压补偿电路，如图3所示，本实施例OLED电压补偿电路301采用上述实施例的方法对对OLED显示面板的驱动电压进行补偿。本实施例OLED电压补偿电路301包括亮度检测单元302、编码单元303、存储单元304、补偿单元305及FRC处理单元306。本实施例还提出一种OLED电压补偿方法，其中，亮度检测单元302用于检测并获取OLED显示面板的各像素的亮度值；编码单元303用于根据Gamma曲线将亮度检测单元302获取的亮度值转换成驱动电压编码；存储单元304用于根据编码单元303的驱动电压编码获取补偿数据，并根据所述补偿数据对所述驱动电压编码值进行补偿，以根据补偿后的驱动电压编码驱动所述OLED显示面板显示。
区别于现有技术，本实施例OLED电压补偿电路301的编码单元303根据Gamma曲线将个像素的亮度值转换成对应的电压编码，经补偿数据补偿后，直接驱动OLED显示面板显示，而无需再将补偿后的电压编码转换成灰度值，因 此能够减少“电压-灰度”转化带来的误差，从而能够提高OLED电压补偿的精度，提高OLED显示面板的显示效果。
可选地，本实施例OLED电压补偿电路301进一步包括FRC处理单元306。FRC处理单元306从补偿单元304获取补偿后的驱动电压编码，并对补偿后的驱动电压进行FRC处理，以使经FRC处理后的驱动电压编码驱动OLED显示面板显示，可以提高驱动电压补偿的精度，且能使OLED显示面板显示更流畅。
本发明进一步提供第二实施例的OLED电压补偿电路，本实施例所揭示的OLED电压补偿电路在上述实施例的OLED电压补偿电路的基础上进行描述。如图10所示，本实施例OLED电压补偿电路1001进一步包括Gamma曲线生成单元1002，Gamma曲线生成单元1002用于获取多个绑点电压，并将多个绑点电压与驱动电压编码进行线性对应；Gamma曲线生成单元1002获取OLED显示面板的驱动电压为各绑点电压时对应的亮度值，并采用线性插值的方式对驱动电压编码的位宽进行扩展；且根据亮度值与驱动电压编码的关系，生成Gamma曲线；编码单元303根据Gamma曲线生成单元1002生成的Gamma曲线将亮度检测单元302获取的亮度值转换成驱动电压编码，以使补偿单元304根据驱动电压编码获取电压补偿数据。
具体地，本实施例的Gamma曲线生成单元1002的具体结构如图5所示，这里不赘述。本实施例的Gamma曲线生成单元1002能对驱动电压编码的位宽进行扩展，能够提高Gamma曲线的精度。其中，亮度检测单元302与亮度检测子单元502可以为同一电路。
本发明还提出一种显示装置，如图11所示，本实施例显示装置1101包括OLED电压补偿电路1102、驱动电路1103及OLED显示面板1104，OLED电压补偿电路1102对OLED显示面板1104的驱动电压进行补偿，驱动电路1103根据OLED电压补偿电路1102补偿后的驱动电压编码驱动OLED显示面板1104工作。关于OLED电压补偿电路1102的结构及补偿原理在上述实施例中进行了详细的叙述，这里不赘述。
区别于现有技术，本实施例的OLED电压补偿电路1102根据Gamma曲线将个像素的亮度值转换成对应的电压编码，经补偿数据补偿后，直接驱动OLED显示面板1104显示，而无需再将补偿后的电压编码转换成灰度值，因此能够减少“电压-灰度”转化带来的误差，从而能够提高OLED电压补偿的精度，提高OLED显示面板1104的显示效果。
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 (17)

  1. 一种OLED电压补偿电路，用于对OLED显示面板的驱动电压进行补偿，所述电压补偿电路包括：
    亮度检测单元，用于检测并获取所述OLED显示面板的各像素的亮度值；
    编码单元，用于根据Gamma曲线将所述亮度检测单元获取的所述亮度值转换成驱动电压编码；
    补偿单元，根据所述编码单元的所述驱动电压编码获取补偿数据，并根据所述补偿数据对所述驱动电压编码值进行补偿，以根据补偿后的驱动电压编码驱动所述OLED显示面板显示；
    其中，所述补偿数据包括电压补偿编码，且所述电压补偿编码的编码步长与所述驱动电压编码的编码步长相同。
  2. 根据权利要求1所述的电压补偿电路，其中，所述电压补偿电路进一步包括Gamma曲线生成单元，所述Gamma曲线坐标包括横轴设置的驱动电压编码及纵轴设置的亮度值，所述Gamma曲线生成单元用于获取多个绑点电压，并将所述多个绑点电压与所述驱动电压编码进行线性对应；所述Gamma曲线生成单元获取所述OLED显示面板的驱动电压为所述各绑点电压时对应的亮度值，并采用线性插值的方式对所述驱动电压编码的位宽进行扩展；且根据所述亮度值与所述驱动电压编码的关系，生成所述Gamma曲线；
    所述编码单元根据所述Gamma曲线单元生成的所述Gamma曲线将所述亮度检测单元获取的所述亮度值转换成所述驱动电压编码，以使所述补偿单元根据所述驱动电压编码获取所述电压补偿数据。
  3. 根据权利要求2所述的电压补偿电路，其中，所述电压补偿电路进一步包括FRC处理单元，所述FRC处理单元用于对所述补偿单元补偿后的所述驱动电压编码进行FRC处理，以使经所述FRC处理后的驱动电压编码驱动所述OLED显示面板显示。
  4. 根据权利要求2所述的电压补偿电路，其中，所述Gamma曲线生成单元对所述驱动电压编码的位宽进行2bit的扩展。
  5. 根据权利要求1所述的电压补偿电路，其中，所述补偿数据进一步包括亮度相关比例系数；所述补偿单元根据所述驱动电压编码获取所述补偿数据对应的电压补偿编码及所述亮度相关比例系数，以利用电压补偿编码及所述亮度相关比例系数对所述驱动电压编码进行补偿。
  6. 一种OLED电压补偿方法，其中，用于对OLED显示面板的驱动电压进行补偿，所述电压补偿方法包括：
    检测并获取所述OLED显示面板的各像素的亮度值；
    根据Gamma曲线将所述亮度值转换成驱动电压编码；
    根据所述驱动电压编码获取补偿数据，并根据所述补偿数据对所述驱动电压编码进行补偿，以根据补偿后的驱动电压编码驱动所述OLED显示面板显示。
  7. 根据权利要求6所述的电压补偿方法，其中，所述Gamma曲线坐标包括横轴设置的驱动电压编码及纵轴设置的亮度值，生成所述根据Gamma曲线的方法包括：
    获取多个绑点电压，并将所述多个绑点电压与所述驱动电压编码进行线性对应；
    获取所述OLED显示面板的驱动电压为所述各绑点电压时对应的所述像素的所述亮度值；
    采用线性插值的方式对所述驱动电压编码的位宽进行扩展；
    根据所述亮度值与所述驱动电压编码的关系，生成所述Gamma曲线。
  8. 根据权利要求7所述的电压补偿方法，其中，对所述驱动电压编码的位宽进行2bit的扩展。
  9. 根据权利要求7所述的电压补偿方法，其中，所述补偿数据包括电压补偿编码；所述根据所述驱动电压编码获取补偿数据包括：
    根据所述驱动电压编码获取所述补偿数据对应的电压补偿编码，以利用电 压补偿编码对所述驱动电压编码进行补偿，其中，所述电压补偿编码的编码步长与所述驱动电压编码的编码步长相同。
  10. 根据权利要求9所述的电压补偿方法，其中，所述补偿数据进一步包括亮度相关比例系数；所述根据所述驱动电压获编码取补偿数据包括：
    根据所述驱动电压编码获取所述补偿数据对应的电压补偿编码及所述亮度相关比例系数，以利用电压补偿编码及所述亮度相关比例系数对所述驱动电压编码进行补偿。
  11. 根据权利要求6所述的电压补偿方法，其中，所述电压补偿方法进一步包括：
    对所述补偿后的所述驱动电压编码进行FRC处理，以使经所述FRC处理后的驱动电压值驱动所述OLED显示面板显示。
  12. 一种显示装置，其中，所述显示装置包括OLED电压补偿电路、驱动电路及OLED显示面板，所述OLED电压补偿电路对所述OLED显示面板的驱动电压进行补偿，所述驱动电路根据所述OLED电压补偿电路补偿后的驱动电压编码驱动所述OLED显示面板工作；
    其中，所述电压补偿电路包括：
    亮度检测单元，用于检测并获取所述OLED显示面板的各像素的亮度值；
    编码单元，用于根据Gamma曲线将所述亮度检测单元获取的所述亮度值转换成驱动电压编码；
    补偿单元，根据所述编码单元的所述驱动电压编码获取补偿数据，并根据所述补偿数据对所述驱动电压编码值进行补偿，以根据补偿后的驱动电压编码驱动所述OLED显示面板显示。
  13. 根据权利要求12所述的显示装置，其中，所述电压补偿电路进一步包括Gamma曲线生成单元，所述Gamma曲线坐标包括横轴设置的驱动电压编码及纵轴设置的亮度值，所述Gamma曲线生成单元用于获取多个绑点电压，并将所述多个绑点电压与所述驱动电压编码进行线性对应；所述Gamma曲线生成单元 获取所述OLED显示面板的驱动电压为所述各绑点电压时对应的亮度值，并采用线性插值的方式对所述驱动电压编码的位宽进行扩展；且根据所述亮度值与所述驱动电压编码的关系，生成所述Gamma曲线；
    所述编码单元根据所述Gamma曲线单元生成的所述Gamma曲线将所述亮度检测单元获取的所述亮度值转换成所述驱动电压编码，以使所述补偿单元根据所述驱动电压编码获取所述电压补偿数据。
  14. 根据权利要求13所述的显示装置，其中，所述电压补偿电路进一步包括FRC处理单元，所述FRC处理单元用于对所述补偿单元补偿后的所述驱动电压编码进行FRC处理，以使经所述FRC处理后的驱动电压编码驱动所述OLED显示面板显示。
  15. 根据权利要求12所述的显示装置，其中，所述Gamma曲线生成单元对所述驱动电压编码的位宽进行2bit的扩展。
  16. 根据权利要求12所述的显示装置，其中，所述补偿数据包括电压补偿编码，且所述电压补偿编码的编码步长与所述驱动电压编码的编码步长相同。
  17. 根据权利要求16所述的显示装置，其中，所述补偿数据进一步包括亮度相关比例系数；所述补偿单元根据所述驱动电压编码获取所述补偿数据对应的电压补偿编码及所述亮度相关比例系数，以利用电压补偿编码及所述亮度相关比例系数对所述驱动电压编码进行补偿。
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Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108428431B (zh) * 2018-03-19 2020-03-24 联想(北京)有限公司 一种屏幕及显示补偿方法
CN112513966A (zh) * 2018-05-28 2021-03-16 深圳市柔宇科技股份有限公司 电子装置及其亮度监测补偿方法
CN108932931A (zh) * 2018-08-03 2018-12-04 武汉华星光电半导体显示技术有限公司 Oled发光补偿方法、装置、存储介质及显示装置
CN109616070A (zh) * 2019-01-15 2019-04-12 成都中电熊猫显示科技有限公司 液晶面板的亮度调节方法、液晶面板和液晶显示器
US10909937B1 (en) * 2019-11-18 2021-02-02 Novatek Microelectronics Corp. Driver circuit and related display system
CN111696470A (zh) * 2020-07-10 2020-09-22 京东方科技集团股份有限公司 显示模组及显示装置
CN112967676B (zh) * 2021-02-24 2022-03-25 昆山国显光电有限公司 显示面板的驱动方法、驱动装置及显示装置

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1971683A (zh) * 2005-11-25 2007-05-30 帆宣系统科技股份有限公司 平面显示器的亮度补偿方法
CN101281728A (zh) * 2007-04-03 2008-10-08 中华映管股份有限公司 适应性伽玛转换电压切换方法及其装置
CN101354487A (zh) * 2007-07-23 2009-01-28 联咏科技股份有限公司 平面显示装置及其驱动方法
US20130120659A1 (en) * 2011-11-10 2013-05-16 Samsung Mobile Display Co., Ltd. Gamma correction system and method for display device
CN105243994A (zh) * 2015-11-11 2016-01-13 深圳市华星光电技术有限公司 Amoled驱动系统及驱动方法
CN106782319A (zh) * 2016-12-27 2017-05-31 京东方科技集团股份有限公司 一种像素电路、像素驱动方法、显示装置

Family Cites Families (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP3518205B2 (ja) * 1996-11-26 2004-04-12 松下電器産業株式会社 画像表示装置
CN1306466C (zh) * 2003-02-18 2007-03-21 友达光电股份有限公司 液晶显示器动态伽玛值调整方法与电路及显示器驱动电路
CN1777927A (zh) * 2003-04-18 2006-05-24 皇家飞利浦电子股份有限公司 液晶显示器伽马校正
JP4346350B2 (ja) * 2003-05-28 2009-10-21 三菱電機株式会社 表示装置
KR101090247B1 (ko) * 2004-04-19 2011-12-06 삼성전자주식회사 4색 표시 장치의 구동 장치 및 방법
CN100336386C (zh) * 2005-08-22 2007-09-05 上海广电（集团）有限公司中央研究院 控制数字图像平均亮度的图像增强方法
KR100844775B1 (ko) * 2007-02-23 2008-07-07 삼성에스디아이 주식회사 유기 전계발광 표시장치
KR101443371B1 (ko) * 2007-07-13 2014-09-29 엘지디스플레이 주식회사 액정표시장치 및 그의 구동방법
JP5430068B2 (ja) * 2008-02-15 2014-02-26 株式会社ジャパンディスプレイ 表示装置
KR20150055503A (ko) * 2013-11-13 2015-05-21 삼성전자주식회사 저전력 디스플레이를 위한 적응적 이미지 보상 방법 및 그 장치
CN105280139B (zh) * 2015-11-11 2018-05-01 深圳市华星光电技术有限公司 Amoled亮度补偿方法及amoled驱动系统

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1971683A (zh) * 2005-11-25 2007-05-30 帆宣系统科技股份有限公司 平面显示器的亮度补偿方法
CN101281728A (zh) * 2007-04-03 2008-10-08 中华映管股份有限公司 适应性伽玛转换电压切换方法及其装置
CN101354487A (zh) * 2007-07-23 2009-01-28 联咏科技股份有限公司 平面显示装置及其驱动方法
US20130120659A1 (en) * 2011-11-10 2013-05-16 Samsung Mobile Display Co., Ltd. Gamma correction system and method for display device
CN105243994A (zh) * 2015-11-11 2016-01-13 深圳市华星光电技术有限公司 Amoled驱动系统及驱动方法
CN106782319A (zh) * 2016-12-27 2017-05-31 京东方科技集团股份有限公司 一种像素电路、像素驱动方法、显示装置

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