Invention Grant
- Patent Title: Pixel circuit, display device, and method for driving same
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Application No.: US15579989Application Date: 2016-06-29
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Publication No.: US10311791B2Publication Date: 2019-06-04
- Inventor: Masanori Ohara , Hideki Uchida , Katsuhiro Kikuchi , Satoshi Inoue , Yuto Tsukamoto , Eiji Koike , Kazuo Takizawa , Noboru Noguchi , Noritaka Kishi
- Applicant: Sharp Kabushiki Kaisha
- Applicant Address: JP Sakai
- Assignee: SHARP KABUSHIKI KAISHA
- Current Assignee: SHARP KABUSHIKI KAISHA
- Current Assignee Address: JP Sakai
- Agency: Keating & Bennett, LLP
- Priority: JP2015-139253 20150710
- International Application: PCT/JP2016/069234 WO 20160629
- International Announcement: WO2017/010286 WO 20170119
- Main IPC: G09G3/325
- IPC: G09G3/325 ; G09G3/3233 ; H01L51/50 ; G09G3/3266

Abstract:
The purpose of the present invention is to suppress the fluctuation of a data line voltage that occurs when an analog voltage signal is sampled and held in a data line in a display device provided with a current-driven display element. Transistors (SWr, SWG, SWb) of each demultiplexer (252) are successively switched on, for each predetermined period, in a selection period of a write control line (SW_LR(i)). In a period when the transistor (SWr) is switched on, an analog video signal (Dj) from a data voltage output unit circuit (211d) is applied to a data line (SLrj) and a pixel circuit (50r). When the transistor SWr is then switched off, the voltage held by the data line (SLrj) decreases below the voltage of the analog video signal (Dj) due to a parasitic capacitance (Cssdr). However, the voltage of a voltage fluctuation compensation line (G3_Cnt (i)) changes from a low level to a high level within the selection period. This causes the voltage of the data line (SLrj) to rise via a capacitor (Ccnt), and the decrease in voltage to be compensated for.
Public/Granted literature
- US20180174507A1 PIXEL CIRCUIT, DISPLAY DEVICE, AND METHOD FOR DRIVING SAME Public/Granted day:2018-06-21
Information query
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