发明申请
US20050275711A1 LED driver using a depletion mode transistor to serve as a current source
失效
LED驱动器使用耗尽型晶体管作为电流源
- 专利标题： LED driver using a depletion mode transistor to serve as a current source
- 专利标题（中）： LED驱动器使用耗尽型晶体管作为电流源
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申请号： US11149292申请日： 2005-06-10
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公开(公告)号： US20050275711A1公开(公告)日： 2005-12-15
- 发明人: Jing-Meng Liu , Chung-Lung Pai , Hung-Der Su
- 申请人： Jing-Meng Liu , Chung-Lung Pai , Hung-Der Su
- 优先权： TW093117082 20040614
- 主分类号： B41J2/47
- IPC分类号： B41J2/47 ; H05B33/08
摘要：
In a LED driver using a depletion mode transistor to serve as a current source, the depletion mode transistor is self-biased for providing a driving current to drive at least one LED, thereby requesting no additional control circuit to control the depletion mode transistor. The driving current is independent on the supply voltage coupled to the at least one LED, thereby requesting no additional voltage regulator, reducing the circuit size, and lowering the cost.