Title:
LED LIGHT EMISSION DEVICE
Document Type and Number:
WIPO Patent Application WO/2015/128986
Kind Code:
A1
Abstract:
The invention of the present application provides an LED light emission device comprising only an analog circuit, without an AC-DC converter being used. The present invention comprises at least: a rectifier circuit (3) for rectifying an AC power supply (2); light-emitting units (6-45) serially connected between terminals (4, 5) of the rectifier circuit (3), each of the light-emitting units (6-45) comprising a light-emitting diode (LD1-LD40) and a switching means (Q1-Q40) that is connected in parallel to the light-emitting diode (LD1-LD40) and switches the corresponding light-emitting diode (LD1-LD40) on or off; a constant current circuit (50) serially connected downstream of the serially connected light-emitting units (6-45); and a voltage holding means (D45) connected in parallel to the constant current circuit (50) and set to the minimum voltage of the fixed current circuit (50).
Inventors:
ISHIKAWA TSUYOSHI (JP)
ISHIHARA KOSEI (JP)
YANAGA AKIHIKO (JP)
ISHIHARA KOSEI (JP)
YANAGA AKIHIKO (JP)
Application Number:
PCT/JP2014/054858
Publication Date:
September 03, 2015
Filing Date:
February 27, 2014
Export Citation:
Assignee:
TOPS CO LTD (JP)
UNION ELECTRONICS IND CO LTD (JP)
ADVANCED MECHICAL INC (JP)
UNION ELECTRONICS IND CO LTD (JP)
ADVANCED MECHICAL INC (JP)
International Classes:
H05B37/02
Foreign References:
| JP2013179279A | 2013-09-09 | |||
| JP2007073665A | 2007-03-22 | |||
| JP2012114236A | 2012-06-14 |
Attorney, Agent or Firm:
OHNUKI & KOTAKE (JP)
Patent business corporation Onuki smallness Takekuni [Hajime] patent firm (JP)
Patent business corporation Onuki smallness Takekuni [Hajime] patent firm (JP)
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