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1. CN107068066 - Pixel compensation circuit, display device and driving method

Office Chine
Numéro de la demande 102017000481256
Date de la demande 22.06.2017
Numéro de publication 107068066
Date de publication 18.08.2017
Type de publication A
CIB
G09G 3/3258
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
3208organiques, p.ex. utilisant des diodes électroluminescentes organiques
3225utilisant une matrice active
3258avec un circuit de pixel pour commander la tension aux bornes de l'élément électroluminescent
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 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 2300/0842
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 3/3291
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]
3275Details of drivers for data electrodes
3291in which the data driver supplies a variable data voltage for setting the current through, or the voltage across, the light-emitting elements
Déposants BOE TECHNOLOGY GROUP CO., LTD.
Inventeurs LI JUNJIE
CAI PENG
Titre
(EN) Pixel compensation circuit, display device and driving method
(ZH) 像素补偿电路及显示装置、驱动方法
Abrégé
(EN)
The embodiment of the present invention provides a pixel compensation circuit, a display device and a driving method. The pixel compensation circuit comprises a reset signal writing-in module, a voltage signal writing-in module, a data signal writing-in module, a driving transistor, a compensation module, a connection control module and a luminescent device. According to the embodiment of the present invention, under the state that the compensation module is turned on, a data signal of a second node is outputted to a first node, under the state that the voltage signal writing-in module is turned on, a voltage signal is outputted to the second node, and under a low gray scale and during a luminescence process, the voltage difference between the first node and the second node is small, and the electric leakage situations of the compensation module can be reduced, so that the voltage holding capability of the first node is conducive to being improved, and the voltage of the grid of the driving transistor is stable, and accordingly, the luminescence of the luminescent device is stable. Moreover, the writing-in position of the data signal is one end of the driving transistor close to the luminescent device, thereby being able to reduce the layout difficulty of the pixel compensation circuit.

(ZH)
本发明实施例提供提供一种像素补偿电路及显示装置、驱动方法。该像素补偿电路包括:复位信号写入模块、电压信号写入模块、数据信号写入模块、驱动晶体管、补偿模块、连接控制模块和发光器件。本发明实施例,在补偿模块处于开启状态下,将第二节点的数据信号输出到第一节点,并且在电压信号写入模块处于开启状态下,将电压信号输出到第二节点,低灰阶下,在发光的过程中,第一节点和第二节点之间的压差较小,可减少补偿模块出现漏电的情况,从而有利于提高第一节点的电压的保持能力,使得驱动晶体管的栅极的电压稳定,从而使得发光器件的发光稳定;并且,数据信号的写入位置为驱动晶体管靠近发光器件的一端,可降低像素补偿电路的布局难度。

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