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1. WO2016155053 - AMOLED PIXEL DRIVING CIRCUIT AND PIXEL DRIVING METHOD

Publication Number WO/2016/155053
Publication Date 06.10.2016
International Application No. PCT/CN2015/077157
International Filing Date 22.04.2015
IPC
G09G 3/3233 2016.01
GPHYSICS
09EDUCATING; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
GARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
3Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
20for 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
22using controlled light sources
30using electroluminescent panels
32semiconductive, e.g. using light-emitting diodes
3208organic, e.g. using organic light-emitting diodes
3225using an active matrix
3233with pixel circuitry controlling the current through the light-emitting element
CPC
G09G 2300/0819
GPHYSICS
09EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
GARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
2300Aspects of the constitution of display devices
08Active 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
0809Several active elements per pixel in active matrix panels
0819used for counteracting undesired variations, e.g. feedback or autozeroing
G09G 2300/0842
GPHYSICS
09EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
GARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
2300Aspects of the constitution of display devices
08Active 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
0809Several active elements per pixel in active matrix panels
0842forming a memory circuit, e.g. a dynamic memory with one capacitor
G09G 2300/0861
GPHYSICS
09EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
GARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
2300Aspects of the constitution of display devices
08Active 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
0809Several active elements per pixel in active matrix panels
0842forming a memory circuit, e.g. a dynamic memory with one capacitor
0861with additional control of the display period without amending the charge stored in a pixel memory, e.g. by means of additional select electrodes
G09G 2310/06
GPHYSICS
09EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
GARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
2310Command of the display device
06Details of flat display driving waveforms
G09G 2320/0233
GPHYSICS
09EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
GARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
2320Control of display operating conditions
02Improving the quality of display appearance
0233Improving the luminance or brightness uniformity across the screen
G09G 2320/045
GPHYSICS
09EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
GARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
2320Control of display operating conditions
04Maintaining the quality of display appearance
043Preventing or counteracting the effects of ageing
045Compensation of drifts in the characteristics of light emitting or modulating elements
Applicants
  • 深圳市华星光电技术有限公司 SHENZHEN CHINA STAR OPTOELECTRONICS TECHNOLOGY CO., LTD. [CN]/[CN]
Inventors
  • 韩佰祥 HAN, Baixiang
Agents
  • 深圳市德力知识产权代理事务所 COMIPS INTELLECTUAL PROPERTY OFFICE
Priority Data
201510141999.627.03.2015CN
Publication Language Chinese (ZH)
Filing Language Chinese (ZH)
Designated States
Title
(EN) AMOLED PIXEL DRIVING CIRCUIT AND PIXEL DRIVING METHOD
(FR) CIRCUIT DE PILOTAGE DE PIXEL À DIODE ÉLECTROLUMINESCENTE ORGANIQUE À MATRICE ACTIVE (AMOLED) ET PROCÉDÉ DE PILOTAGE DE PIXEL
(ZH) AMOLED像素驱动电路及像素驱动方法
Abstract
(EN)
An AMOLED pixel driving circuit and pixel driving method. The AMOLED pixel driving circuit adopts a 5T2C structure, comprising first, second, third, fourth and fifth thin film transistors (T1, T2, T3, T4, T5), first and second capacitors (C1, C2) and an organic light-emitting diode (OLED), wherein the first thin film transistor (T1) is a driving thin film transistor; and first, second and third global signals (G1, G2, G3) are introduced and the three are combined with a scanning signal (Scan) to be successively corresponding to an initial stage (1), a data signal writing stage (2), a threshold value voltage compensation stage (3) and a driving lighting stage (4), wherein the data signal writing stage (2) and the threshold value voltage compensation stage (3) are separately carried out. A threshold value voltage change of the driving thin film transistor (T1) and the organic light-emitting diode (OLED) is effectively compensated by means of driving thin film transistor (T1) source electrode following, so that the display brightness of an AMOLED is relatively uniform, and the display quality is improved.
(FR)
L'invention concerne un circuit de pilotage de pixel à diode électroluminescente organique à matrice active (AMOLED) et un procédé de pilotage de pixel. Le circuit de pilotage de pixel à AMOLED adopte une structure 5T2C, comprenant des premier, deuxième, troisième, quatrième et cinquième transistors en couches minces (T1, T2, T3, T4, T5), des premier et second condensateurs (C1, C2) et une diode électroluminescente organique (OLED), le premier transistor en couches minces (T1) étant un transistor en couches minces de pilotage; et des premier, deuxième et troisième signaux globaux (G1, G2, G3) sont introduits et les trois sont combinés avec un signal de balayage (Balayage) pour correspondre successivement à une étape initiale (1), à une étape d'écriture de signal de données (2), à une étape de compensation de tension de valeur de seuil (3) et à une étape d'éclairage de pilotage (4), l'étape d'écriture de signal de données (2) et l'étape de compensation de tension de valeur de seuil (3) étant réalisées séparément. Un changement de tension de valeur de seuil du transistor en couches minces de pilotage (T1) et de la diode électroluminescente organique (OLED) est compensé de manière efficace au moyen d'un suivi d'électrode de source de transistor en couches minces de pilotage (T1), de telle sorte que la luminosité d'affichage d'une AMOLED est relativement uniforme, et la qualité d'affichage est améliorée.
(ZH)
一种AMOLED像素驱动电路及像素驱动方法。该AMOLED像素驱动电路采用5T2C结构,包括第一、第二、第三、第四、第五薄膜晶体管(T1、T2、T3、T4、T5)、第一、第二电容(C1、C2)、及有机发光二极管(OLED),所述第一薄膜晶体管(T1)为驱动薄膜晶体管;并引入第一、第二、第三全局信号(G1、G2、G3),三者与扫描信号(Scan)相组合先后对应于初始化阶段(1),数据信号写入阶段(2)、阈值电压补偿阶段(3)、及驱动发光阶段(4),其中,数据信号写入阶段(2)和阈值电压补偿阶段(3)分开进行,通过驱动薄膜晶体管(T1)源极跟随的方式有效补偿了驱动薄膜晶体管(T1)及有机发光二级管(OLED)的阈值电压变化,使AMOLED的显示亮度较均匀,提升显示品质。
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