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1. WO2020062796 - PIXEL CIRCUIT AND CONTROL METHOD THEREFOR, DISPLAY PANEL, AND DISPLAY DEVICE

Publication Number WO/2020/062796
Publication Date 02.04.2020
International Application No. PCT/CN2019/078044
International Filing Date 13.03.2019
IPC
G09G 3/3266 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
3266Details of drivers for scan electrodes
CPC
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 3/3233
GPHYSICS
09EDUCATION; 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 ; no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
22using controlled light sources
30using electroluminescent panels
32semiconductive, e.g. using light-emitting diodes [LED]
3208organic, e.g. using organic light-emitting diodes [OLED]
3225using an active matrix
3233with pixel circuitry controlling the current through the light-emitting element
G09G 3/3266
GPHYSICS
09EDUCATION; 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 ; no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
22using controlled light sources
30using electroluminescent panels
32semiconductive, e.g. using light-emitting diodes [LED]
3208organic, e.g. using organic light-emitting diodes [OLED]
3266Details of drivers for scan electrodes
Applicants
  • 昆山国显光电有限公司 KUNSHAN GO-VISIONOX OPTO-ELECTRONICS CO., LTD. [CN]/[CN]
Inventors
  • 朱正勇 ZHU, Zhengyong
  • 赵国华 ZHAO, Guohua
  • 朱晖 ZHU, Hui
Agents
  • 广州华进联合专利商标代理有限公司 ADVANCE CHINA IP LAW OFFICE
Priority Data
201811140287.228.09.2018CN
Publication Language Chinese (ZH)
Filing Language Chinese (ZH)
Designated States
Title
(EN) PIXEL CIRCUIT AND CONTROL METHOD THEREFOR, DISPLAY PANEL, AND DISPLAY DEVICE
(FR) CIRCUIT DE PIXELS ET PROCÉDÉ DE COMMANDE ASSOCIÉ, PANNEAU D'AFFICHAGE ET DISPOSITIF D'AFFICHAGE
(ZH) 像素电路及其控制方法、显示面板、显示装置
Abstract
(EN)
A pixel circuit and a control method therefor, a display panel, and a display device, comprising: a first transistor (T1), a second transistor (T2), a third transistor (T3), a fourth transistor (T4), a fifth transistor (T5), a sixth transistor (T6), a seventh transistor (T7), an eighth transistor (T8), a ninth transistor (T9), a capacitor (C1) and a light emitting diode (D1). In the pixel circuit, a second reference voltage (Vref2) is used to perform compensation on a control terminal of the first transistor (T1) by means of the capacitor (C1), in order to cause a drive current (I) flowing through the first transistor (T1) to be correlated with the second reference voltage (Vref2), and not correlated with a first power supply (VDD). Because the drive current (I) flows through the power supply line, when the drive current (I) and the first power supply (VDD) are not correlated, a current-resistance voltage drop on the power supply line does not impact the drive current (I), and the uniformity of the luminosity of a screen can thus be improved.
(FR)
L'invention concerne un circuit de pixels et un procédé de commande associé, un panneau d'affichage et un dispositif d'affichage, comprenant : un premier transistor (T1), un deuxième transistor (T2), un troisième transistor (T3), un quatrième transistor (T4), un cinquième transistor (T5), un sixième transistor (T6), un septième transistor (T7), un huitième transistor (T8), un neuvième transistor (T9), un condensateur (C1) et une diode électroluminescente (D1). Dans le circuit de pixels, une seconde tension de référence (Vref2) sert à appliquer une compensation à une borne de commande du premier transistor (T1) au moyen du condensateur (C1), afin d'amener un courant d'attaque (I) circulant à travers le premier transistor (T1) à être corrélé avec la seconde tension de référence (Vref2), et à ne pas être corrélé avec une première alimentation électrique (VDD). Du fait que le courant d'attaque (I) circule à travers la ligne d'alimentation électrique, lorsque le courant d'attaque (I) et la première alimentation électrique (VDD) ne sont pas corrélés, une chute de tension de résistance au courant sur la ligne d'alimentation n'a pas d'impact sur le courant d'attaque (I), ce qui permet d'améliorer l'uniformité de la luminosité d'un écran.
(ZH)
像素电路及其控制方法、显示面板、显示装置,包括:第一晶体管(T1)、第二晶体管(T2)、第三晶体管(T3)、第四晶体管(T4)、第五晶体管(T5)、第六晶体管(T6)、第七晶体管(T7)、第八晶体管(T8)、第九晶体管(T9)、电容(C1)及发光二极管(D1)。像素电路利用第二参考电压(Vref2)通过电容(C1)对第一晶体管(T1)的控制端进行补偿,以使流过第一晶体管(T1)的驱动电流(I)与第二参考电压(Vref2)有关,而与第一电源(VDD)无关。由于驱动电流(I)流经电源线,在驱动电流(I)与第一电源(VDD)无关的情况下,电源线上的电流-电阻压降对驱动电流(I)无影响,进而可以提高屏体的发光均一性。
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