Title:
OLED PIXEL DRIVING CIRCUIT AND DRIVING METHOD THEREOF
Document Type and Number:
WIPO Patent Application WO/2019/080256
Kind Code:
A1
Abstract:
The invention relates to an OLED pixel driving circuit and a driving method thereof. The OLED pixel driving circuit comprises: a first thin film transistor (T1), the grid electrode thereof is connected with a second node (B), and the source electrode and the drain electrode thereof are connected with a third node (C) and a fourth node (D) respectively; a second thin film transistor (T2), the grid electrode thereof is connected with a first signal (S1), and the source electrode and the drain electrode thereof are connected with the second node (B) and the fourth node (D) respectively. a third thin film transistor (T3), the grid electrode thereof is connected with a second signal (S2), and the source electrode and the drain electrode thereof are connected with a first node (A) and the second node (B) respectively and a fourth thin film transistor (T4), the grid electrode thereof is connected with a third signal (S3), and the source electrode and the drain electrode thereof are connected with the fourth node (D) and an anode of an OLED. A cathode of the OLED is connected with a power supply low potential (OVSS). Two ends of a capacitor (C1) are connected with the first node (A) and the second node (B) respectively. The third node (C) is connected with a power supply high potential (OVDD). The first node (A) is connected with a voltage input end (Vdata/Vref). The driving method eliminate the phenomenon of uneven luminescence caused by different threshold voltages.
Inventors:
WANG SHAN (CN)
WEN YICHIEN (CN)
WEN YICHIEN (CN)
Application Number:
PCT/CN2017/113717
Publication Date:
May 02, 2019
Filing Date:
November 30, 2017
Export Citation:
Assignee:
SHENZHEN CHINA STAR OPTOELECTRONICS SEMICONDUCTOR DISPLAY TECH CO LTD (CN)
International Classes:
G09G3/3208
Foreign References:
| CN104464624A | 2015-03-25 | |||
| CN104680982A | 2015-06-03 | |||
| CN105702214A | 2016-06-22 | |||
| CN106920517A | 2017-07-04 | |||
| CN106782330A | 2017-05-31 | |||
| CN105789250A | 2016-07-20 | |||
| KR20110030210A | 2011-03-23 |
Attorney, Agent or Firm:
COMIPS INTELLECTUAL PROPERTY OFFICE (CN)
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