Invention Grant
- Patent Title: DA/AC convert for driving cold cathode fluorescent lamp
- Patent Title (中): DA / AC转换驱动冷阴极荧光灯
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Application No.: US11582916Application Date: 2006-10-17
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Publication No.: US07825605B2Publication Date: 2010-11-02
- Inventor: Junming Zhang , Xiaopeng Dong , Yuancheng Ren , Wei Chen , Eric Yang
- Applicant: Junming Zhang , Xiaopeng Dong , Yuancheng Ren , Wei Chen , Eric Yang
- Applicant Address: US CA San Jose
- Assignee: Monolithic Power Systems, Inc.
- Current Assignee: Monolithic Power Systems, Inc.
- Current Assignee Address: US CA San Jose
- Agency: Perkins Coie LLP
- Priority: CN200510114121 20051017
- Main IPC: H05B41/14
- IPC: H05B41/14
Abstract:
The present invention discloses a DC/AC converter in the backlight power supply system using cold cathode fluorescent lamp (CCFL). The DC/AC converter comprises a front end DC/DC converter, a full-bridge or half bridge inverter, and a piezoelectric transformer. Even with a wide range of input voltages, the front end DC/DC converter produces a predetermined DC voltage or a DC voltage with a predetermined small range and the cascaded inverter operates with a switching frequency close to the resonant frequency of the piezoelectric transformer, which helps the backlight power supply system achieve high efficiency.
Public/Granted literature
- US20070086217A1 DC/AC convert for driving cold cathode fluorescent lamp Public/Granted day:2007-04-19
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