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1. CN110619851 - Pixel circuit, driving method and display device

Office
China
Application Number 201910905348.8
Application Date 24.09.2019
Publication Number 110619851
Publication Date 27.12.2019
Publication Kind A
IPC
G09G 3/3258
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
3258with pixel circuitry controlling the voltage across the light-emitting element
CPC
G09G 3/3258
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
3258with pixel circuitry controlling the voltage across the light-emitting element
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
Applicants BOE TECHNOLOGY GROUP CO., LTD.
京东方科技集团股份有限公司
Inventors DONG TIAN
董甜
Agents 北京同达信恒知识产权代理有限公司 11291
Title
(EN) Pixel circuit, driving method and display device
(ZH) 像素电路、驱动方法及显示装置
Abstract
(EN) The invention discloses a pixel circuit, a driving method and a display device. The pixel circuit comprises a signal input module, a threshold compensation module, a light-emitting control module, a driving transistor and a light-emitting device, the signal input module writes the voltage of the data signal end, the voltage of the reference voltage signal end and the threshold voltage of the driving transistor into the grid electrode of the driving transistor according to the signals of the first, second and third control signal ends; the threshold compensation module is used for conducting the grid electrode of the driving transistor with the first electrode of the driving transistor under the control of a signal of a reset signal end; the light-emitting control module is controlled by the first light-emitting control end and the second light-emitting control end to conduct the first power supply end and the driving transistor and conduct the driving transistor and the light-emittingdevice, so that the light-emitting device emits light. Through the mutual cooperation of the modules and the elements, the problem of non-uniform luminance caused by non-uniform threshold voltage andvoltage drop of the first power supply end is solved.
(ZH) 本发明公开了一种像素电路、驱动方法及显示装置,包括:信号输入模块、阈值补偿模块、发光控制模块、驱动晶体管和发光装置;信号输入模块根据第一、第二以及第三控制信号端的信号,将数据信号端的电压、参考电压信号端的电压、驱动晶体管的阈值电压写入驱动晶体管的栅极;阈值补偿模块在复位信号端的信号的控制下,将驱动晶体管的栅极与驱动晶体管的第一极导通;发光控制模块在第一发光控制端和第二发光控制端的控制下,导通第一电源端与驱动晶体管、驱动晶体管与发光装置,使发光装置发光。通过上述模块和元件的相互配合,改善了由于阈值电压电压不均匀和第一电源端的压降导致的发光亮度不均匀的问题。
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US17417318This application is not viewable in PATENTSCOPE because the national phase entry has not been published yet or the national entry is issued from a country that does not share data with WIPO or there is a formatting issue or an unavailability of the application.