Invention Grant
- Patent Title: Pixel circuit and display device
- Patent Title (中): 像素电路和显示设备
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Application No.: US13504435Application Date: 2010-07-22
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Publication No.: US08854346B2Publication Date: 2014-10-07
- Inventor: Yoshimitsu Yamauchi
- Applicant: Yoshimitsu Yamauchi
- Applicant Address: JP Osaka-shi
- Assignee: Sharp Kabushiki Kaisha
- Current Assignee: Sharp Kabushiki Kaisha
- Current Assignee Address: JP Osaka-shi
- Agency: Morrison & Foerster LLP
- Priority: JP2009-255346 20091106
- International Application: PCT/JP2010/062319 WO 20100722
- International Announcement: WO2011/055573 WO 20110512
- Main IPC: G09G5/00
- IPC: G09G5/00 ; G09G3/36

Abstract:
In a display device including a pixel circuit having a transistor with a low electron mobility, low power consumption is realized without decreasing an aperture ratio. An liquid crystal capacitor element (Clc) is formed between a pixel circuit (20) and a counter electrode (80). One ends of the pixel electrode (20), a first switch circuit (22), and a second switch circuit (23) and a first terminal of a second transistor (T2) form an internal node (N1). The other end of the first switch circuit (22) is connected to a source line (SL). The second switch circuit (23) has the other end connected to a voltage supply line (VSL), and is a series circuit of transistors (T1 and T3). A control terminal of the transistor (T1), a second terminal of the transistor (T2), and one end of the boost capacitor element (Cbst) form an output node (N2). The other end of the boost capacitor element (Cbst) and the control terminal of the transistor (T2) are connected to a selecting line (SEL) and a reference line REF, respectively. A control terminal of the transistor (T3) is connected to the selecting line (SEL) through a delay circuit (31).
Public/Granted literature
- US20120218247A1 PIXEL CIRCUIT AND DISPLAY DEVICE Public/Granted day:2012-08-30
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