发明授权
- 专利标题: Light source lighting device including a constant-current supply that is connected to a light source and supplies a constant current of a substantially constant magnitude to the light source, and luminaire
- 专利标题(中): 光源照明装置,其包括连接到光源并且向光源提供基本恒定幅度的恒定电流的恒流源,以及照明器
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申请号: US13274617申请日: 2011-10-17
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公开(公告)号: US08710750B2公开(公告)日: 2014-04-29
- 发明人: Takafumi Nonaka , Takashi Kumagai , Yuichiro Ito , Haruka Kinoshita , Shinsuke Funayama , Takashi Maeda
- 申请人: Takafumi Nonaka , Takashi Kumagai , Yuichiro Ito , Haruka Kinoshita , Shinsuke Funayama , Takashi Maeda
- 申请人地址: JP Chiyoda-Ku, Tokyo
- 专利权人: Mitsubishi Electric Corporation
- 当前专利权人: Mitsubishi Electric Corporation
- 当前专利权人地址: JP Chiyoda-Ku, Tokyo
- 代理机构: Buchanan Ingersoll & Rooney PC
- 优先权: JP2011-011342 20110121
- 主分类号: H05B39/00
- IPC分类号: H05B39/00
摘要:
A power supply circuit drives circuits having different numbers of series-connected LEDs without changing a circuit constant or a component. An LED series circuit is connected to a power converter circuit of a power supply circuit. The power converter circuit is controlled by a control arithmetic circuit, and supplies a constant current to the LED series circuit. A voltage detection circuit detects a voltage applied to the LED series circuit. The control arithmetic circuit checks whether the LED series circuit has 40 LEDs or 20 LEDs, based on the voltage detected by the voltage detection circuit. The control arithmetic circuit holds a constant-current value table for 40 LEDs and a constant-current value table for 20 LEDs. In accordance with the detected voltage, the control arithmetic circuit selects one constant-current value table, and controls the power converter circuit based on the constant-current value table selected.
公开/授权文献
- US20120187863A1 LIGHT SOURCE LIGHTING DEVICE AND LUMINAIRE 公开/授权日:2012-07-26