发明授权
- 专利标题: LED lighting apparatus
- 专利标题(中): LED照明装置
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申请号: US11746768申请日: 2007-05-10
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公开(公告)号: US07667414B2公开(公告)日: 2010-02-23
- 发明人: Takashi Fujino , Shigeru Murata , Kazuaki Ashinuma
- 申请人: Takashi Fujino , Shigeru Murata , Kazuaki Ashinuma
- 申请人地址: JP Tokyo
- 专利权人: Stanley Electric Co., Ltd.
- 当前专利权人: Stanley Electric Co., Ltd.
- 当前专利权人地址: JP Tokyo
- 代理机构: Cermak Kenealy Vaidya & Nakajima LLP
- 优先权: JP2006-144408 20060524; JP2006-144411 20060524
- 主分类号: H05B37/02
- IPC分类号: H05B37/02
摘要:
An LED lighting apparatus can be configured to supply a number of LEDs connected in series with a requisite voltage and power even if an amount of forward voltage of the LEDs connected in series is larger than a supply voltage of a battery. The LED lighting apparatus can include a boosting circuit and an inverted boosting circuit. LEDs can be connected between outputs of the boosting circuit and the inverted boosting circuit. The LED lighting apparatus can also include a current detection circuit configured to detect an LED current, and can include a dual PWM control IC configured to control the boosting circuit and the inverted boosting circuit in accordance with the LED current detected by the current detection circuit so as to keep the LED current substantially constant. The LED lighting apparatus can include a shutdown circuit to stop supplying a power supply when a load that includes the LEDs is in a circuit that is either opened or shorted.
公开/授权文献
- US20070273306A1 LED Lighting Apparatus 公开/授权日:2007-11-29
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