Invention Grant
- Patent Title: Display panel driving voltage output circuit
- Patent Title (中): 显示面板驱动电压输出电路
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Application No.: US12618806Application Date: 2009-11-16
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Publication No.: US08294653B2Publication Date: 2012-10-23
- Inventor: Akira Nakayama
- Applicant: Akira Nakayama
- Applicant Address: JP Tokyo
- Assignee: Oki Semiconductor Co., Ltd.
- Current Assignee: Oki Semiconductor Co., Ltd.
- Current Assignee Address: JP Tokyo
- Agency: Volentine & Whitt, PLLC
- Priority: JP2008-297935 20081121
- Main IPC: G09G5/00
- IPC: G09G5/00

Abstract:
A driving voltage output circuit for a matrix display panel includes high-side voltage followers and low-side voltage followers. Each voltage follower includes a differential input stage, a control stage, and an output stage. The differential input stage receives non-inverting and inverting inputs and produces first and second potentials. The control stage generates third and fourth potentials from the first and second potentials. The output stage includes three transistors connected respectively to the high-side power supply, the low-side power supply, and an intermediate reference potential, and connected in common to an output terminal. Two of the three transistors are of identical channel type and are controlled by the first and fourth potentials. The third transistor is of the opposite conductive type and is controlled by the third potential.
Public/Granted literature
- US20100128018A1 DISPLAY PANEL DRIVING VOLTAGE OUTPUT CIRCUIT Public/Granted day:2010-05-27
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