Invention Grant
- Patent Title: Display device
- Patent Title (中): 显示设备
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Application No.: US13522618Application Date: 2010-11-19
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Publication No.: US08836688B2Publication Date: 2014-09-16
- Inventor: Yoshimitsu Yamauchi
- Applicant: Yoshimitsu Yamauchi
- Applicant Address: JP Osaka
- Assignee: Sharp Kabushiki Kaisha
- Current Assignee: Sharp Kabushiki Kaisha
- Current Assignee Address: JP Osaka
- Agency: Keating & Bennett, LLP
- Priority: JP2010-012217 20100122
- International Application: PCT/JP2010/070674 WO 20101119
- International Announcement: WO2011/089781 WO 20110728
- Main IPC: G09G5/00
- IPC: G09G5/00 ; G09G3/36

Abstract:
A display device which can prevent deterioration of a liquid crystal and reduction in display quality at low power consumption without lowering an aperture ratio is provided. An opposite voltage (Vcom) is applied to an opposite electrode (80) of a liquid crystal capacitive element (Clc). One ends of a pixel electrode (20), a first switch circuit (22), a second switch circuit (23), and a first terminal of a second transistor (T2) form an internal node (N1). The other ends of the first switch circuit (22) and the second switch circuit (23) are connected to a source line (SL) and a voltage supply line (VSL), respectively. A control terminal of a first transistor (T1) in the second switch circuit (23), a second terminal of the second transistor (T2), and one end of a boost capacitive element (Cbst) form an output node (N2). The other end of the boost capacitive element (Cbst) and the control terminal of the second transistor (T2) are connected to a boost line (BST) and a reference line (REF), respectively. This configuration makes it possible to perform an action (self-refresh action) to return the absolute value of the voltage between both ends of a display element part to the value at the time of a last writing action without performing a writing action.
Public/Granted literature
- US20120299899A1 DISPLAY DEVICE Public/Granted day:2012-11-29
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