Invention Grant
- Patent Title: LED driver circuit and LED lighting device using the same
- Patent Title (中): LED驱动电路和LED照明装置使用相同
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Application No.: US13198929Application Date: 2011-08-05
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Publication No.: US08643301B2Publication Date: 2014-02-04
- Inventor: Atsushi Kanamori , Takayuki Shimizu , Hirohisa Warita , Hiroyuki Shoji
- Applicant: Atsushi Kanamori , Takayuki Shimizu , Hirohisa Warita , Hiroyuki Shoji
- Applicant Address: JP Osaka
- Assignee: Sharp Kabushiki Kaisha
- Current Assignee: Sharp Kabushiki Kaisha
- Current Assignee Address: JP Osaka
- Agency: Birch, Stewart, Kolasch & Birch, LLP
- Priority: JP2010-186208 20100823; JP2011-125274 20110603
- Main IPC: G05F1/00
- IPC: G05F1/00 ; H05B39/04
Abstract:
Provided is an LED driver circuit, to be connected to an AC power supply via a phase-control dimmer, for driving an LED load, including: a switching power supply part including a switching element and a switching current detection part; an LED current detection part; a first control part for controlling and switching the switching element so that a switching current has a desired current value based on a detection signal of the switching current detection part; a second control part for controlling and switching the switching element so that an LED current has a desired current value based on a detection signal of the LED current detection part; and a switch part for switching between control performed by the first control part when the phase-control dimmer is set to high brightness dimming and control performed by the second control part when the phase-control dimmer is set to low brightness dimming.
Public/Granted literature
- US20120043902A1 LED DRIVER CIRCUIT AND LED LIGHTING DEVICE USING THE SAME Public/Granted day:2012-02-23
Information query
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