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1. CN104599638 - Pixel circuit, drive method thereof and display device

Office Chine
Numéro de la demande 201510076814.8
Date de la demande 12.02.2015
Numéro de publication 104599638
Date de publication 06.05.2015
Type de publication A
CIB
G09G 3/32
GPHYSIQUE
09ENSEIGNEMENT; CRYPTOGRAPHIE; PRÉSENTATION; PUBLICITÉ; SCEAUX
GDISPOSITIONS OU CIRCUITS POUR LA COMMANDE DE L'AFFICHAGE UTILISANT DES MOYENS STATIQUES POUR PRÉSENTER UNE INFORMATION VARIABLE
3Dispositions ou circuits de commande présentant un intérêt uniquement pour l'affichage utilisant des moyens de visualisation autres que les tubes à rayons cathodiques
20pour la présentation d'un ensemble de plusieurs caractères, p.ex. d'une page, en composant l'ensemble par combinaison d'éléments individuels disposés en matrice
22utilisant des sources lumineuses commandées
30utilisant des panneaux électroluminescents
32semi-conducteurs, p.ex. utilisant des diodes électroluminescentes
CPC
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 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 2300/0861
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
G09G 2310/0262
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
0262The addressing of the pixel, in a display other than an active matrix LCD, involving the control of two or more scan electrodes or two or more data electrodes, e.g. pixel voltage dependent on signals of two data electrodes
G09G 2320/043
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
Déposants BOE TECHNOLOGY GROUP CO., LTD.
BEIJING BOE OPTOELECTRONICS TECHNOLOGY CO., LTD.
Inventeurs YANG SHENGJI
DONG XUE
WANG HAISHENG
LIU YINGMING
ZHAO WEIJIE
DING XIAOLIANG
Mandataires shen jian
Titre
(EN) Pixel circuit, drive method thereof and display device
(ZH) 一种像素电路及其驱动方法和显示装置
Abrégé
(EN)
An embodiment of the invention provides a pixel circuit, a drive method thereof and a display device, relates to the technical field of display and aims to solve the problem that drive current is under the effect of DTFT threshold shifting. The pixel circuit comprises a reset unit, a drive unit, a control unit, an energy storage unit and a display unit; the drive unit is used for outputting the control voltage or drive current; the control unit is used for aligning the voltage of a second node with that of a first level terminal and aligning the voltage of a first node with the control voltage or aligning the voltage of a data signal terminal with that of the second node; the display unit is used for displaying gray scale under the control of the drive current, fourth scanning signals of a fourth scanning signal terminal and the voltage of a fourth level terminal. The pixel circuit is used for display manufacture.

(ZH)

本发明的实施例提供一种像素电路及其驱动方法和显示装置,涉及显示技术领域,用于解决DTFT阈值漂移对驱动电流造成影响的问题,该像素电路包括:复位单元、驱动单元、控制单元、储能单元和显示单元;驱动单元用于输出控制电压或驱动电流,控制单元用于将第二节点的电压与第三电平端的电压拉齐,以及将第一节点的电压与控制电压拉齐,或者将数据信号端的电压与第二节点的电压拉齐;显示单元用于在驱动电流、第四扫描信号端的第四扫描信号和第四电平端的电压的控制下显示灰阶。本发明实施例用于显示器制造。

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