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1. CN111986616 - Pixel circuit and display panel

Office
China
Application Number 202010900163.0
Application Date 31.08.2020
Publication Number 111986616
Publication Date 24.11.2020
Publication Kind A
IPC
G09G 3/32
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
G09G 3/3233
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
3233with pixel circuitry controlling the current through the light-emitting element
CPC
G09G 3/32
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]
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 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
H01L 27/3265
HELECTRICITY
01BASIC ELECTRIC ELEMENTS
LSEMICONDUCTOR DEVICES; ELECTRIC SOLID STATE DEVICES NOT OTHERWISE PROVIDED FOR
27Devices consisting of a plurality of semiconductor or other solid-state components formed in or on a common substrate
28including components using organic materials as the active part, or using a combination of organic materials with other materials as the active part
32with components specially adapted for light emission, e.g. flat-panel displays using organic light-emitting diodes [OLED]
3241Matrix-type displays
3244Active matrix displays
326special geometry or disposition of pixel-elements
3265of capacitor
Applicants WUHAN CHINA STAR OPTOELECTRONICS TECHNOLOGY CO., LTD.
武汉华星光电技术有限公司
Inventors CAO HAIMING
曹海明
TIAN CHAO
田超
Agents 深圳紫藤知识产权代理有限公司 44570
Title
(EN) Pixel circuit and display panel
(ZH) 像素电路及显示面板
Abstract
(EN) The application discloses a pixel circuit and a display panel, and relates to the technical field of display. The pixel circuit comprises a driving transistor, a first transistor, a second transistor,a first capacitor and a second capacitor; potential presetting is carried out on a grid electrode, a drain electrode and a source electrode of the driving transistor before light emitting, so that the light emitting current flowing through the driving transistor during light emitting is not influenced by the threshold voltage of the driving transistor, and the phenomenon of uneven light emittingcaused by threshold voltage drift is eliminated.
(ZH) 本申请公开了一种像素电路及显示面板,涉及显示技术领域,其包括驱动晶体管、第一晶体管、第二晶体管、第一电容以及第二电容;通过在发光之前对驱动晶体管的栅极、漏极以及源极进行电位预置,在发光时流经驱动晶体管的发光电流可以不受驱动晶体管的阈值电压的影响,进而消除了其阈值电压漂移致使发光不均的现象。
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