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1. CN110459172 - Pixel driving circuit, driving method and display device

Office
China
Application Number 201810435167.9
Application Date 08.05.2018
Publication Number 110459172
Publication Date 15.11.2019
Grant Number 110459172
Grant Date 09.06.2020
Publication Kind B
IPC
G09G 3/3225
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
CPC
G09G 3/3225
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
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 3/3258
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 2300/0833
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
0833forming a linear amplifier or follower
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 2310/0251
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
02Addressing, scanning or driving the display screen or processing steps related thereto
0243Details of the generation of driving signals
0251Precharge or discharge of pixel before applying new pixel voltage
Applicants BOE TECHNOLOGY GROUP CO., LTD.
京东方科技集团股份有限公司
昆明京东方显示技术有限公司
Inventors SHI RONGRONG
施蓉蓉
YANG SHENGJI
杨盛际
LIU WEI
刘伟
Agents 北京中博世达专利商标代理有限公司 11274
Title
(EN) Pixel driving circuit, driving method and display device
(ZH) 一种像素驱动电路及驱动方法、显示装置
Abstract
(EN) The embodiment of the invention provides a pixel driving circuit, a driving method and a display device, relates to the technical field of display, and can solve the problem of low OLED brightness caused by voltage loss in the prior art. The pixel driving circuit comprises a driving transistor and a light emitting diode, also comprises a boosted circuit connected with the second node; the anode ofthe light-emitting diode is connected with the boosted circuit through a third node; the boosted circuit comprises a capacitor module and a switch module. The switch module is connected with a firstelectrode, a second electrode and a third voltage end in the capacitor module; the switch module is used for controlling the conduction of the first electrode and the second node of the capacitor module and the conduction of the second electrode and the third voltage end of the capacitor module so as to charge the capacitor module; and the control module is also used for controlling the conductionof the first electrode and the third node of the capacitor module and the conduction of the second electrode and the second node of the capacitor module so as to amplify the voltage of the first electrode of the charged capacitor module and output the amplified voltage to the third node.
(ZH) 本发明实施例提供一种像素驱动电路及驱动方法、显示装置,涉及显示技术领域,能够解决现有技术中因电压损失导致的OLED亮度低的问题;该像素驱动电路,包括驱动晶体管、发光二极管;还包括:与第二节点连接的升压电路;发光二极管的阳极通过第三节点与升压电路连接;升压电路包括:电容模块和开关模块;开关模块与电容模块中的第一电极和第二电极、以及第三电压端连接;开关模块用于控制电容模块的第一电极与第二节点以及电容模块的第二电极与第三电压端导通,以对电容模块进行充电;还用于控制电容模块的第一电极与第三节点以及电容模块的第二电极与第二节点导通,以将充电后的电容模块的第一电极的电压放大后输出至第三节点。
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