发明授权
- 专利标题： System and method for information handling system display backlight protection and monitoring
- 专利标题（中）： 信息处理系统和方法显示背光保护和监控
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申请号： US12061830申请日： 2008-04-03
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公开(公告)号： US07692912B2公开(公告)日： 2010-04-06
- 发明人: Greg R. Fiebrich , Erin L. Price , Guangyong Zhu
- 申请人： Greg R. Fiebrich , Erin L. Price , Guangyong Zhu
- 申请人地址： US TX Round Rock
- 专利权人： Dell Products L.P.
- 当前专利权人： Dell Products L.P.
- 当前专利权人地址： US TX Round Rock
- 代理机构： Hamilton & Terrile, LLP
- 代理商 Robert W. Holland
- 主分类号： H02H3/08
- IPC分类号： H02H3/08
摘要：
A current limiting MOSFET monitors power applied to a direct current boost regulator that powers an LED backlight to automatically shut off power to the boost regulator if the current exceeds a predetermined amount. An embedded controller interfaces with the current limiting MOSFET for normal control of operation of the boost regulator by turning the MOSFET on and off. An overcurrent alert is communicated from the MOSFET to the embedded controller if the current exceeds the predetermined amount so that the embedded controller shuts off power to the boost regulator and indicates the failure to an end user.
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