Invention Grant
- Patent Title: Light-emitting circuit with variable resistor element, and light-emitting module and illumination device including the same
- Patent Title (中): 具有可变电阻元件的发光电路，以及包括其的发光模块和照明装置
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Application No.: US14376571Application Date: 2012-10-29
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Publication No.: US09408278B2Publication Date: 2016-08-02
- Inventor: Akira Takahashi
- Applicant: Panasonic Corporation
- Applicant Address: JP Osaka
- Assignee: Panasonic Intellectual Property Management Co., Ltd.
- Current Assignee: Panasonic Intellectual Property Management Co., Ltd.
- Current Assignee Address: JP Osaka
- Agency: Renner, Otto, Boisselle & Sklar, LLP
- Priority: JP2012-023785 20120207
- International Application: PCT/JP2012/006922 WO 20121029
- International Announcement: WO2013/118208 WO 20130815
- Main IPC: H05B37/02
- IPC: H05B37/02 ; H05B33/08
Abstract:
An LED module receives current supplied from a variable current source. The LED module includes a first LED that is connected to a variable current source, a bipolar transistor that is series-connected to the first LED and has a resistance that varies depending on magnitude of the current It supplied from the variable current source, and a second LED that is parallel-connected to a series circuit that is composed of the first LED and the bipolar transistor and differs in luminescent color from the first LED.
Public/Granted literature
- US20140361711A1 LIGHT-EMITTING CIRCUIT, LIGHT-EMITTING MODULE, AND ILLUMINATION DEVICE Public/Granted day:2014-12-11
Information query
