发明授权
US08901838B2 Semiconductor device, LED driving circuit, and apparatus for displaying an image
有权
半导体装置，LED驱动电路以及显示图像的装置
- 专利标题： Semiconductor device, LED driving circuit, and apparatus for displaying an image
- 专利标题（中）： 半导体装置，LED驱动电路以及显示图像的装置
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申请号： US13560613申请日： 2012-07-27
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公开(公告)号： US08901838B2公开(公告)日： 2014-12-02
- 发明人: Noboru Akiyama , Takayuki Hashimoto , Takashi Hirao , Nobuyoshi Matsuura , Hideo Ishii
- 申请人： Noboru Akiyama , Takayuki Hashimoto , Takashi Hirao , Nobuyoshi Matsuura , Hideo Ishii
- 申请人地址： JP Kanagawa
- 专利权人： Renesas Electronics Corporation
- 当前专利权人： Renesas Electronics Corporation
- 当前专利权人地址： JP Kanagawa
- 代理机构： Brundidge & Stanger, P.C.
- 优先权： JP2009-118252 20090515
- 主分类号： H05B37/02
- IPC分类号： H05B37/02 ; H01L29/78 ; H05B33/08 ; G09G3/34 ; H01L29/06 ; H01L29/417
摘要：
The semiconductor device is included in the LED driving circuit (current regulator) of driving the LED array (with series-connected number m×parallel-connected number n), and is formed of a plurality (n pieces) of LED driving devices of controlling a current (constant-current driving) flowing in each string. A vertical semiconductor device, for example, a vertical MOSFET is used as the LED driving device. Both of a main device functioning as a constant-current driving device and a subsidiary device functioning as a circuit-breaking switch during dimming are formed inside a chip of the device, which are formed of the vertical semiconductor devices. In a first surface of the device, each source region of the main device and the subsidiary device is formed so as to be insulated from each other through an isolation region.