Invention Grant
- Patent Title: Liquid crystal display device
- Patent Title (中): 液晶显示装置
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Application No.: US13851137Application Date: 2013-03-27
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Publication No.: US09274357B2Publication Date: 2016-03-01
- Inventor: Satoshi Takahashi
- Applicant: Japan Display Inc.
- Applicant Address: JP Tokyo
- Assignee: Japan Display Inc.
- Current Assignee: Japan Display Inc.
- Current Assignee Address: JP Tokyo
- Agency: Typha IP LLC
- Priority: JP2012-094046 20120417
- Main IPC: G02F1/133
- IPC: G02F1/133 ; G09G3/34 ; H05B33/08

Abstract:
A main voltage step-up circuit includes a coil which one end thereof is connected to a power supply; a main switching element which is connected between the other end of the coil and a ground potential, and which is controlled by the main control circuit; a diode which is connected to the other end of the coil; a smoothing capacitor which is connected to the diode and is a ceramic capacitor; and an auxiliary voltage step-up circuit which is connected to the other end of the coil. The auxiliary voltage step-up circuit is ON when the main step-up voltage circuit is OFF, and compensates a potential change in the smoothing capacitor. The auxiliary voltage step-up circuit includes an auxiliary switching element which is connected between the other end of the coil and a ground potential; and an auxiliary control circuit which controls the auxiliary switching element.
Public/Granted literature
- US20130271702A1 LIQUID CRYSTAL DISPLAY DEVICE Public/Granted day:2013-10-17
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