Invention Grant
- Patent Title: Driving circuit for light-emitting device and display apparatus
- Patent Title (中): 发光装置和显示装置的驱动电路
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Application No.: US12235052Application Date: 2008-09-22
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Publication No.: US08390539B2Publication Date: 2013-03-05
- Inventor: Somei Kawasaki , Kouji Ikeda
- Applicant: Somei Kawasaki , Kouji Ikeda
- Applicant Address: JP Tokyo
- Assignee: Canon Kabushiki Kaisha
- Current Assignee: Canon Kabushiki Kaisha
- Current Assignee Address: JP Tokyo
- Agency: Fitzpatrick, Cella, Harper & Scinto
- Priority: JP2007-249145 20070926
- Main IPC: G09G3/30
- IPC: G09G3/30 ; G09G3/10

Abstract:
A driving circuit for a light-emitting device outputs a drive current from an output terminal to the light-emitting device in accordance with a signal current input from an input terminal. The driving circuit includes a drive transistor, a capacitor connected between a gate and a source of the driving transistor, and a resistance device and a first switch arranged in series between a drain of the drive transistor and the input terminal. In addition, a second switch is configured to connect the gate and the drain of the drive transistor through the resistance device when the first switch is closed, and a third switch is disposed in a path through which a drain current of the drive transistor flows from the output terminal to the light-emitting device. The resistance device increases its resistance in accordance with a cumulative amount of a passing current.
Public/Granted literature
- US20090085908A1 DRIVING CIRCUIT FOR LIGHT-EMITTING DEVICE AND DISPLAY APPARATUS Public/Granted day:2009-04-02
Information query
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