CN103956142B - 面板驱动电路及面板驱动方法 - Google Patents

面板驱动电路及面板驱动方法 Download PDF

Info

Publication number
CN103956142B
CN103956142B CN201410206832.9A CN201410206832A CN103956142B CN 103956142 B CN103956142 B CN 103956142B CN 201410206832 A CN201410206832 A CN 201410206832A CN 103956142 B CN103956142 B CN 103956142B
Authority
CN
China
Prior art keywords
electric current
ambient lighting
electrically connected
grid
panel
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Active
Application number
CN201410206832.9A
Other languages
English (en)
Other versions
CN103956142A (zh
Inventor
徐向阳
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
TCL China Star Optoelectronics Technology Co Ltd
Original Assignee
Shenzhen China Star Optoelectronics Technology Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Shenzhen China Star Optoelectronics Technology Co Ltd filed Critical Shenzhen China Star Optoelectronics Technology Co Ltd
Priority to CN201410206832.9A priority Critical patent/CN103956142B/zh
Priority to US14/378,637 priority patent/US20160232846A1/en
Priority to PCT/CN2014/078678 priority patent/WO2015172411A1/zh
Publication of CN103956142A publication Critical patent/CN103956142A/zh
Application granted granted Critical
Publication of CN103956142B publication Critical patent/CN103956142B/zh
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • 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
    • 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]
    • G09G3/3266—Details of drivers for scan electrodes
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2300/00—Aspects of the constitution of display devices
    • G09G2300/08—Active matrix structure, i.e. with use of active elements, inclusive of non-linear two terminal elements, in the pixels together with light emitting or modulating elements
    • G09G2300/0809—Several active elements per pixel in active matrix panels
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2300/00—Aspects of the constitution of display devices
    • G09G2300/08—Active matrix structure, i.e. with use of active elements, inclusive of non-linear two terminal elements, in the pixels together with light emitting or modulating elements
    • G09G2300/0809—Several active elements per pixel in active matrix panels
    • G09G2300/0842—Several active elements per pixel in active matrix panels forming a memory circuit, e.g. a dynamic memory with one capacitor
    • 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
    • G09G2320/0233—Improving the luminance or brightness uniformity across the screen
    • 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
    • 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
    • G09G2360/14—Detecting light within display terminals, e.g. using a single or a plurality of photosensors
    • G09G2360/144—Detecting light within display terminals, e.g. using a single or a plurality of photosensors the light being ambient light
    • 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]
    • G09G3/3275—Details of drivers for data electrodes
    • G09G3/3291—Details of drivers for data electrodes in which the data driver supplies a variable data voltage for setting the current through, or the voltage across, the light-emitting elements

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Computer Hardware Design (AREA)
  • General Physics & Mathematics (AREA)
  • Theoretical Computer Science (AREA)
  • Electroluminescent Light Sources (AREA)
  • Control Of El Displays (AREA)
  • Control Of Indicators Other Than Cathode Ray Tubes (AREA)

Abstract

本发明提供一种面板驱动电路及面板驱动方法，该面板驱动电路包括：扫描控制晶体管(T1)、驱动晶体管(T2)、光敏晶体管(T3)、存储电容(C1)、及有机发光二极管(OLED)；还包括扫描控制端(Scan？n)、数据信号端(Data？n)、电源电压输入端(Vdd)、及低电压输入端(Vgl)；所述驱动晶体管(T2)的驱动电流为灰阶电流(I1)，所述光敏晶体管(T3)的电流为环境光照电流(I2)，所述灰阶电流(I1)取决于存储电容(C1)中存储的灰阶电压，而所述环境光照电流(I2)取决于环境光照的大小；面板的亮度取决于所述灰阶电流(I1)与所述环境光照电流(I2)总和的大小。

Description

面板驱动电路及面板驱动方法
技术领域
本发明涉及显示技术领域，尤其涉及一种面板驱动电路及面板驱动方法。
背景技术
作为新一代显示技术，AMOLED(ActiveMatrix/OrganicLightEmittingDiode，有源矩阵有机发光二极体面板)具有亮度高、色域广、视角宽、响应快、体积小等优点。通常，采用LTPS(LowTemperaturePoly-silicon，低温多晶硅)技术制造AMOLED驱动电路。AMOLED的发光器件为OLED(OrganicLight-EmittingDiode，有机发光二极管)，在AMOLED驱动电路的驱动下，当有电流流过发光器件OLED时，OLED发光。
目前，AMOLED驱动电路通常采用传统的2T1C电路，请参阅图1，为传统的AMOLED面板驱动电路2T1C。包括：扫描控制晶体管(T1’)、驱动晶体管(T2’)、存储电容(C1’)、及有机发光二极管(OLED’)；还包括扫描控制端(Scann’)、数据信号端(Datan’)、及电源电压输入端(Vdd’)；所述扫描控制晶体管(T1’)包括第一栅极(g1’)、第一源极(s1’)、及第一漏极(d1’)，所述驱动晶体管(T2’)包括第二栅极(g2’)、第二源极(s2’)、及第二漏极(d2’)；所述第一栅极(g1’)电性连接于扫描控制端(Scann’)，所述第一源极(s1’)电性连接于数据信号端(Datan’)，所述第一漏极(d1’)电性连接于第二栅极(g2’)与存储电容(C1’)的上极板；所述存储电容(C1’)的下极板接地(GND’)；所述有机发光二极管(OLED’)的阳极电性连接于电源电压输入端(Vdd’)，有机发光二极管(OLED’)的阴极电性连接于第二源极(s2’)；所述第二漏极(d2’)接地(GND’)。所述驱动晶体管(T2’)用于确定AMOLED面板驱动电路的驱动电流，所述有机发光二极管(OLED’)用于响应驱动电流而发光显示；所述存储电容(C1’)主要是存储数据信号端(Datan’)输出的灰阶(GrayScale)电压信号，所述驱动晶体管(T2’)的驱动电流大小由存储电容(C1’)中存储的灰阶电压大小决定，AMOLED的亮度取决于所述驱动晶体管(T2’)的驱动电流大小；所述扫描控制晶体管(T1’)与驱动晶体管(T2’)均为薄膜晶体管(ThinFilmTransistor，TFT)。
但是，一方面由于驱动晶体管(T2’)的阈值电压会随着工作时间而漂移，从而导致有机发光二极管(OLED’)的发光不稳定；另一方面由于扫描控制晶体管(T1’)的泄漏电流的存在，使得存储电容(C1’)的电压不稳定，从而也导致了有机发光二极管(OLED’)的发光不稳定。而且，由于各个像素的驱动晶体管(T2’)的阈值电压的漂移不同，增大或减小，使得各个像素间的发光不均匀。因此，传统的两个晶体管一个电容2T1C的像素驱动电路已经不适合高质量的AMOLED的显示。
AMOLED不同于TFT-LCD(ThinFilmTransistorLCD，薄膜晶体管有源矩阵液晶显示器)之处在于两点：第一点是TFT-LCD为被动发光，主要是靠调节背光亮度来显示画面，而AMOLED为主动发光；第二点是TFT-LCD为电压驱动，而AMOLED为电流驱动，因此，AMOLED对TFT的稳定性要求更高。
目前，由于LTPS技术尚不够成熟，通过LTPS技术制造出的TFT的阈值电压Vth均匀性很差，并且存在漂移，导致流经OLED驱动电流的不均匀，从而降低了AMOLED亮度的均匀性。由于AMOLED属于电流驱动，OLED的亮度由电流大小决定，电流越大亮度越高，但一直处于高亮度工作模式下，其寿命会大大降低。另外，AMOLED背板的良率仍然很低，OLED发光材料的寿命和色彩稳定度也不理想，因此，AMOLED的量产性尚不够高。
发明内容
本发明的目的在于提供一种面板驱动电路和面板驱动方法，可以降低AMOLED的驱动功耗，延长AMOLED的使用寿命，并增强显示画面质量。
为实现上述目的，本发明提供一种面板驱动电路，包括：扫描控制晶体管(T1)、驱动晶体管(T2)、光敏晶体管(T3)、存储电容(C1)、及有机发光二极管(OLED)；还包括扫描控制端(Scann)、数据信号端(Datan)、电源电压输入端(Vdd)、及低电压输入端(Vgl)；所述扫描控制晶体管(T1)包括第一栅极(g1)、第一源极(s1)、及第一漏极(d1)，所述驱动晶体管(T2)包括第二栅极(g2)、第二源极(s2)、及第二漏极(d2)；所述光敏晶体管(T3)包括第三栅极(g3)、第三源极(s3)、及第三漏极(d3)；所述第一栅极(g1)电性连接于扫描控制端(Scann)，所述第一源极(s1)电性连接于数据信号端(Datan)，所述第一漏极(d1)电性连接于第二栅极(g2)与存储电容(C1)的上极板；所述存储电容(C1)的下极板接地(GND)；所述有机发光二极管(OLED)的阳极电性连接于电源电压输入端(Vdd)，有机发光二极管(OLED)的阴极电性连接于第二源极(s2)与第三源极(s3)；所述第二漏极(d2)与第三漏极(d3)电性连接后接地(GND)，所述第三栅极(g3)电性连接于低电压输入端(Vgl)。
其中，所述存储电容(C1)存储数据信号端(Datan)输出的灰阶电压信号。
其中，所述驱动晶体管(T2)的驱动电流为灰阶电流(I1)，所述光敏晶体管(T3)的电流为环境光照电流(I2)，所述灰阶电流(I1)取决于存储电容(C1)中存储的灰阶电压，而所述环境光照电流(I2)取决于环境光照的大小。
其中，面板的亮度取决于灰阶电流(I1)与环境光照电流(I2)总和的大小。
其中，所述扫描控制晶体管(T1)、驱动晶体管(T2)、及光敏晶体管(T3)均为薄膜晶体管。
本发明还提供一种面板驱动方法，包括：
提供扫描控制晶体管(T1)、驱动晶体管(T2)、光敏晶体管(T3)、存储电容(C1)、有机发光二极管(OLED)、扫描控制端(Scann)、数据信号端(Datan)、电源电压输入端(Vdd)、及低电压输入端(Vgl)；
所述扫描控制晶体管(T1)包括第一栅极(g1)、第一源极(s1)、及第一漏极(d1)，所述驱动晶体管(T2)包括第二栅极(g2)、第二源极(s2)、及第二漏极(d2)；所述光敏晶体管(T3)包括第三栅极(g3)、第三源极(s3)、及第三漏极(d3)；
将第一栅极(g1)电性连接于扫描控制端(Scann)，将第一源极(s1)电性连接于数据信号端(Datan)，将第一漏极(d1)电性连接于第二栅极(g2)与存储电容(C1)的上极板；将存储电容(C1)的下极板接地(GND)；将有机发光二极管(OLED)的阳极电性连接于电源电压输入端(Vdd)，有机发光二极管(OLED)的阴极电性连接于第二源极(s2)与第三源极(s3)；将第二漏极(d2)与第三漏极(d3)电性连接后接地(GND)，将第三栅极(g3)电性连接于低电压输入端(Vgl)。
其中，所述存储电容(C1)存储数据信号端(Datan)输出的灰阶电压信号。
其中，所述驱动晶体管(T2)的驱动电流为灰阶电流(I1)，所述光敏晶体管(T3)的电流为环境光照电流(I2)，所述灰阶电流(I1)取决于存储电容(C1)中存储的灰阶电压，而所述环境光照电流(I2)取决于环境光照的大小。
其中，面板的亮度取决于灰阶电流(I1)与环境光照电流(I2)总和的大小。
其中，所述扫描控制晶体管(T1)、驱动晶体管(T2)、及光敏晶体管(T3)均为薄膜晶体管。
本发明的有益效果：本发明提供一种面板驱动电路及面板驱动方法，通过在面板驱动晶体管的源极与漏极两端并联一个光敏晶体管，该光敏晶体管的电流受环境光照的控制，进而使面板的亮度取决于驱动晶体管的灰阶电流与光敏晶体管的环境光照电流总和的大小。因此，面板的亮度随环境光亮度的变化而变化，进而降低面板的驱动功耗，延长面板的使用寿命和显示画面质量。
为了能更进一步了解本发明的特征以及技术内容，请参阅以下有关本发明的详细说明与附图，然而附图仅提供参考与说明用，并非用来对本发明加以限制。
附图说明
下面结合附图，通过对本发明的具体实施方式详细描述，将使本发明的技术方案及其它有益效果显而易见。
附图中，
图1为现有的AMOLED面板驱动电路2T1C示意图；
图2为本发明面板驱动电路的示意图；
图3为本发明面板驱动方法的流程图。
具体实施方式
为更进一步阐述本发明所采取的技术手段及其效果，以下结合本发明的优选实施例及其附图进行详细描述。
请参阅图2，图2为本发明的面板驱动电路示意图，包括：扫描控制晶体管(T1)、驱动晶体管(T2)、光敏晶体管(T3)、存储电容(C1)、及有机发光二极管(OLED)；还包括扫描控制端(Scann)、数据信号端(Datan)、电源电压输入端(Vdd)、及低电压输入端(Vgl)；所述扫描控制晶体管(T1)包括第一栅极(g1)、第一源极(s1)、及第一漏极(d1)，所述驱动晶体管(T2)包括第二栅极(g2)、第二源极(s2)、及第二漏极(d2)；所述光敏晶体管(T3)包括第三栅极(g3)、第三源极(s3)、及第三漏极(d3)；所述第一栅极(g1)电性连接于扫描控制端(Scann)，所述第一源极(s1)电性连接于数据信号端(Datan)，所述第一漏极(d1)电性连接于第二栅极(g2)与存储电容(C1)的上极板；所述存储电容(C1)的下极板接地(GND)；所述有机发光二极管(OLED)的阳极电性连接于电源电压输入端(Vdd)，有机发光二极管(OLED)的阴极电性连接于第二源极(s2)与第三源极(s3)；所述第二漏极(d2)与第三漏极(d3)电性连接后接地(GND)，所述第三栅极(g3)电性连接于低电压输入端(Vgl)。
所述存储电容(C1)主要是存储数据信号端(Datan)输出的灰阶电压信号，所述驱动晶体管(T2)的驱动电流大小由存储电容(C1)中存储的灰阶电压大小决定；所述扫描控制晶体管(T1)、驱动晶体管(T2)、及光敏晶体管(T3)均为薄膜晶体管。
所述光敏晶体管(T3)的电流受环境光照的控制，当环境光照增加时，该光敏晶体管(T3)的电流会增加；当环境光照减少时，该光敏晶体管(T3)的电流减小。
具体的，所述驱动晶体管(T2)的驱动电流为灰阶电流(I1)，所述光敏晶体管(T3)的电流为环境光照电流(I2)，所述灰阶电流(I1)取决于存储电容(C1)中存储的灰阶电压，而所述环境光照电流(I2)取决于环境光照的大小，当环境光照越强时，环境光照电流(I2)越大。面板的亮度取决于灰阶电流(I1)与环境光照电流(I2)总和的大小，即环境光照增加时，环境光照电流(I2)会增大，有机发光二极管(OLED)的亮度随之增加；环境光照减少时，环境光照电流(I2)会减小，有机发光二极管(OLED)的亮度随之降低。
本实施例的面板为有源矩阵有机发光二极体(AMOLED)面板。
请参阅图3，本发明还提供一种面板驱动方法，包括：
提供扫描控制晶体管(T1)、驱动晶体管(T2)、光敏晶体管(T3)、存储电容(C1)、有机发光二极管(OLED)、扫描控制端(Scann)、数据信号端(Datan)、电源电压输入端(Vdd)、及低电压输入端(Vgl)；
所述扫描控制晶体管(T1)包括第一栅极(g1)、第一源极(s1)、及第一漏极(d1)，所述驱动晶体管(T2)包括第二栅极(g2)、第二源极(s2)、及第二漏极(d2)；所述光敏晶体管(T3)包括第三栅极(g3)、第三源极(s3)、及第三漏极(d3)；
将第一栅极(g1)电性连接于扫描控制端(Scann)，将第一源极(s1)电性连接于数据信号端(Datan)，将第一漏极(d1)电性连接于第二栅极(g2)与存储电容(C1)的上极板；将存储电容(C1)的下极板接地(GND)；将有机发光二极管(OLED)的阳极电性连接于电源电压输入端(Vdd)，有机发光二极管(OLED)的阴极电性连接于第二源极(s2)与第三源极(s3)；将第二漏极(d2)与第三漏极(d3)电性连接后接地(GND)，将第三栅极(g3)电性连接于低电压输入端(Vgl)。
所述存储电容(C1)主要是存储数据信号端(Datan)输出的灰阶电压信号。
所述驱动晶体管(T2)的驱动电流为灰阶电流(I1)，所述光敏晶体管(T3)的电流为环境光照电流(I2)，所述灰阶电流(I1)取决于存储电容(C1)中存储的灰阶电压，而所述环境光照电流(I2)取决于环境光照的大小。
面板的亮度取决于灰阶电流(I1)与环境光照电流(I2)总和的大小。
所述扫描控制晶体管(T1)、驱动晶体管(T2)、及光敏晶体管(T3)均为薄膜晶体管。
本实施例的面板为有源矩阵有机发光二极体(AMOLED)面板。
综上所述，本发明提供一种面板驱动电路及面板驱动方法，通过在面板驱动晶体管的源极与漏极两端并联一个光敏晶体管，该光敏晶体管的电流受环境光照的控制，进而使面板的亮度取决于驱动晶体管的灰阶电流与光敏晶体管的环境光照电流总和的大小。因此，面板的亮度随环境光亮度的变化而变化，进而降低面板的驱动功耗，延长面板的使用寿命和显示画面质量。
以上所述，对于本领域的普通技术人员来说，可以根据本发明的技术方案和技术构思作出其他各种相应的改变和变形，而所有这些改变和变形都应属于本发明权利要求的保护范围。

Claims (8)

1.一种面板驱动电路，其特征在于，包括：扫描控制晶体管(T1)、驱动晶体管(T2)、光敏晶体管(T3)、存储电容(C1)、及有机发光二极管(OLED)；还包括扫描控制端(Scann)、数据信号端(Datan)、电源电压输入端(Vdd)、及低电压输入端(Vgl)；
所述扫描控制晶体管(T1)包括第一栅极(g1)、第一源极(s1)、及第一漏极(d1)，所述驱动晶体管(T2)包括第二栅极(g2)、第二源极(s2)、及第二漏极(d2)；所述光敏晶体管(T3)包括第三栅极(g3)、第三源极(s3)、及第三漏极(d3)；
所述第一栅极(g1)电性连接于扫描控制端(Scann)，所述第一源极(s1)电性连接于数据信号端(Datan)，所述第一漏极(d1)电性连接于第二栅极(g2)与存储电容(C1)的上极板；所述存储电容(C1)的下极板接地(GND)；所述有机发光二极管(OLED)的阳极电性连接于电源电压输入端(Vdd)，有机发光二极管(OLED)的阴极电性连接于第二源极(s2)与第三源极(s3)；所述第二漏极(d2)与第三漏极(d3)电性连接后接地(GND)，所述第三栅极(g3)电性连接于低电压输入端(Vgl)。
2.如权利要求1所述的面板驱动电路，其特征在于，所述存储电容(C1)存储数据信号端(Datan)输出的灰阶电压信号。
3.如权利要求2所述的面板驱动电路，其特征在于，所述驱动晶体管(T2)的驱动电流为灰阶电流(I1)，所述光敏晶体管(T3)的电流为环境光照电流(I2)，所述灰阶电流(I1)取决于存储电容(C1)中存储的灰阶电压，所述环境光照电流(I2)取决于环境光照的大小。
4.如权利要求3所述的面板驱动电路，其特征在于，面板的亮度取决于所述灰阶电流(I1)与所述环境光照电流(I2)总和的大小。
5.如权利要求1所述的面板驱动电路，其特征在于，所述扫描控制晶体管(T1)、驱动晶体管(T2)、及光敏晶体管(T3)均为薄膜晶体管。
6.一种面板驱动方法，其特征在于，包括：
提供扫描控制晶体管(T1)、驱动晶体管(T2)、光敏晶体管(T3)、存储电容(C1)、有机发光二极管(OLED)、扫描控制端(Scann)、数据信号端(Datan)、电源电压输入端(Vdd)、及低电压输入端(Vgl)；
所述扫描控制晶体管(T1)包括第一栅极(g1)、第一源极(s1)、及第一漏极(d1)，所述驱动晶体管(T2)包括第二栅极(g2)、第二源极(s2)、及第二漏极(d2)；所述光敏晶体管(T3)包括第三栅极(g3)、第三源极(s3)、及第三漏极(d3)；
将第一栅极(g1)电性连接于扫描控制端(Scann)，将第一源极(s1)电性连接于数据信号端(Datan)，将第一漏极(d1)电性连接于第二栅极(g2)与存储电容(C1)的上极板；将存储电容(C1)的下极板接地(GND)；将有机发光二极管(OLED)的阳极电性连接于电源电压输入端(Vdd)，有机发光二极管(OLED)的阴极电性连接于第二源极(s2)与第三源极(s3)；将第二漏极(d2)与第三漏极(d3)电性连接后接地(GND)，将第三栅极(g3)电性连接于低电压输入端(Vgl)；
所述驱动晶体管(T2)的驱动电流为灰阶电流(I1)，所述光敏晶体管(T3)的电流为环境光照电流(I2)，所述灰阶电流(I1)取决于存储电容(C1)中存储的灰阶电压，所述环境光照电流(I2)取决于环境光照的大小；
面板的亮度取决于灰阶电流(I1)与环境光照电流(I2)总和的大小；
当环境光照越强时，环境光照电流(I2)越大，环境光照增加时，环境光照电流(I2)会增大，有机发光二极管(OLED)的亮度随之增加；环境光照减少时，环境光照电流(I2)会减小，有机发光二极管(OLED)的亮度随之降低。
7.如权利要求6所述的面板驱动方法，其特征在于，所述存储电容(C1)存储数据信号端(Datan)输出的灰阶电压信号。
8.如权利要求6所述的面板驱动方法，其特征在于，所述扫描控制晶体管(T1)、驱动晶体管(T2)、及光敏晶体管(T3)均为薄膜晶体管。
CN201410206832.9A 2014-05-15 2014-05-15 面板驱动电路及面板驱动方法 Active CN103956142B (zh)

Priority Applications (3)

Application Number Priority Date Filing Date Title
CN201410206832.9A CN103956142B (zh) 2014-05-15 2014-05-15 面板驱动电路及面板驱动方法
US14/378,637 US20160232846A1 (en) 2014-05-15 2014-05-28 Panel driving circuit and panel driving method
PCT/CN2014/078678 WO2015172411A1 (zh) 2014-05-15 2014-05-28 面板驱动电路及面板驱动方法

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201410206832.9A CN103956142B (zh) 2014-05-15 2014-05-15 面板驱动电路及面板驱动方法

Publications (2)

Publication Number Publication Date
CN103956142A CN103956142A (zh) 2014-07-30
CN103956142B true CN103956142B (zh) 2016-03-09

Family

ID=51333408

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201410206832.9A Active CN103956142B (zh) 2014-05-15 2014-05-15 面板驱动电路及面板驱动方法

Country Status (3)

Country Link
US (1) US20160232846A1 (zh)
CN (1) CN103956142B (zh)
WO (1) WO2015172411A1 (zh)

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104867454A (zh) * 2015-06-10 2015-08-26 深圳市华星光电技术有限公司 用于amoled分区驱动的控制电路及控制方法
CN105355171B (zh) * 2015-12-15 2019-01-11 惠州Tcl移动通信有限公司 驱动扫描电路、显示屏及移动终端
CN105573000B (zh) 2016-03-25 2019-05-03 京东方科技集团股份有限公司 Tft及制作方法、阵列基板、显示面板及驱动方法、显示装置
CN105977268B (zh) * 2016-05-23 2019-03-26 京东方科技集团股份有限公司 一种光敏器件及显示面板、显示装置
KR102661651B1 (ko) * 2017-02-06 2024-04-30 삼성디스플레이 주식회사 화소 및 이를 포함하는 표시 장치 및 화소
CN106935190B (zh) * 2017-02-22 2019-02-05 上海天马有机发光显示技术有限公司 一种有机发光显示面板、有机发光显示装置、有机发光显示面板的驱动方法
CN110164384B (zh) * 2018-09-29 2022-06-10 京东方科技集团股份有限公司 一种亮度补偿方法及装置
CN111785203B (zh) * 2020-07-09 2021-09-24 深圳市华星光电半导体显示技术有限公司 发光电路的驱动方法及驱动装置
CN114783345A (zh) * 2022-04-22 2022-07-22 京东方科技集团股份有限公司 像素驱动电路、显示模组及显示装置、智能手表

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1753066A (zh) * 2004-09-22 2006-03-29 统宝光电股份有限公司 设计方法、面板及电子装置
CN101068026A (zh) * 2006-05-02 2007-11-07 统宝光电股份有限公司 有机电致发光显示元件及其制造方法
JP2008046617A (ja) * 2006-08-11 2008-02-28 Toppoly Optoelectronics Corp ムラ欠陥を減少するシステム及び方法
JP2009157148A (ja) * 2007-12-27 2009-07-16 Seiko Epson Corp 発光装置の駆動方法および駆動方法、電子機器
CN101738252A (zh) * 2008-11-06 2010-06-16 胜华科技股份有限公司 光感测器与光电装置
CN101976679A (zh) * 2010-03-11 2011-02-16 友达光电股份有限公司 具有光反馈补偿的主动矩阵式有机发光二极管显示器
CN102402931A (zh) * 2010-09-14 2012-04-04 财团法人工业技术研究院 光敏电路以及光敏显示器系统

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2001020591A1 (en) * 1999-09-11 2001-03-22 Koninklijke Philips Electronics N.V. Active matrix electroluminescent display device
KR20050057535A (ko) * 2002-09-23 2005-06-16 코닌클리케 필립스 일렉트로닉스 엔.브이. 광감응성 요소를 구비한 매트릭스 디스플레이 디바이스
CN1609938A (zh) * 2004-11-25 2005-04-27 友达光电股份有限公司 自动调整自发光亮度的电路与方法
CN101777305B (zh) * 2010-01-06 2012-10-03 四川虹视显示技术有限公司 一种可以消除图像残影的amoled驱动装置及方法
US20110248973A1 (en) * 2010-04-09 2011-10-13 Delphi Technologies, Inc. Brightness control drive circuit for a current-driven display device
US20120026079A1 (en) * 2010-07-27 2012-02-02 Apple Inc. Using a display abstraction to control a display
KR20130057014A (ko) * 2011-11-23 2013-05-31 삼성디스플레이 주식회사 터치 스크린 패널 및 이를 포함하는 표시 장치
CN202584685U (zh) * 2012-03-22 2012-12-05 信利半导体有限公司 一种可以改善amoled面板亮度稳定性的像素单元驱动电路

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1753066A (zh) * 2004-09-22 2006-03-29 统宝光电股份有限公司 设计方法、面板及电子装置
CN101068026A (zh) * 2006-05-02 2007-11-07 统宝光电股份有限公司 有机电致发光显示元件及其制造方法
JP2008046617A (ja) * 2006-08-11 2008-02-28 Toppoly Optoelectronics Corp ムラ欠陥を減少するシステム及び方法
JP2009157148A (ja) * 2007-12-27 2009-07-16 Seiko Epson Corp 発光装置の駆動方法および駆動方法、電子機器
CN101738252A (zh) * 2008-11-06 2010-06-16 胜华科技股份有限公司 光感测器与光电装置
CN101976679A (zh) * 2010-03-11 2011-02-16 友达光电股份有限公司 具有光反馈补偿的主动矩阵式有机发光二极管显示器
CN102402931A (zh) * 2010-09-14 2012-04-04 财团法人工业技术研究院 光敏电路以及光敏显示器系统

Also Published As

Publication number Publication date
US20160232846A1 (en) 2016-08-11
CN103956142A (zh) 2014-07-30
WO2015172411A1 (zh) 2015-11-19

Similar Documents

Publication Publication Date Title
CN103956142B (zh) 面板驱动电路及面板驱动方法
CN106935190B (zh) 一种有机发光显示面板、有机发光显示装置、有机发光显示面板的驱动方法
CN205080892U (zh) 像素驱动电路、像素电路、显示面板和显示装置
CN104850270B (zh) 触控模组的驱动方法、驱动电路、触控模组、面板和装置
CN102890910B (zh) 同异步双栅tft-oled像素驱动电路及其驱动方法
CN104167173B (zh) 主动式有机发光二极管显示器的像素电路
CN103700347B (zh) 有机发光二极管的驱动电路
WO2016202037A1 (zh) Oled像素电路及其显示装置
CN103165080B (zh) 像素电路及其驱动方法、显示装置
US9881554B2 (en) Driving method of pixel circuit and driving device thereof
US20150206477A1 (en) Array substrate, driving method thereof, and display device
CN103745685B (zh) 有源矩阵式有机发光二极管面板驱动电路及驱动方法
WO2017117983A1 (zh) 像素补偿电路及amoled显示装置
CN104835454A (zh) 一种有机电致发光触控面板、其驱动方法显示装置
KR20140071600A (ko) 화소 회로와 그 구동 방법 및 이를 이용한 유기발광표시장치
CN102682705B (zh) Amoled像素驱动电路
CN104700780A (zh) 一种像素电路及其驱动方法、显示装置
CN103500556A (zh) 一种像素电路及其驱动方法、薄膜晶体管背板
CN104200778A (zh) 像素电路及其驱动方法、显示面板、显示装置
CN104200777A (zh) 像素电路及其驱动方法、显示面板、显示装置
CN104751771A (zh) 像素电路结构、有源矩阵有机发光显示器件及其驱动方法
CN106023892A (zh) 有机发光显示装置的驱动方法
CN108538253B (zh) Amoled显示器的像素驱动系统及驱动方法
CN110379369A (zh) 一种像素补偿电路及驱动方法
CN107369412A (zh) 一种像素电路及其驱动方法、显示装置

Legal Events

Date Code Title Description
C06 Publication
PB01 Publication
C10 Entry into substantive examination
SE01 Entry into force of request for substantive examination
C14 Grant of patent or utility model
GR01 Patent grant