Title:
LED TURN-ON DEVICE
Document Type and Number:
Japanese Patent JP2011108768
Kind Code:
A
Abstract:
To provide an LED turn-on device capable of turning on light emitting diodes except light emitting elements in which an open fault occurs among a plurality of series-connected light emitting diodes even when the number of the light emitting elements in which an open fault occurs increases.
The LED turn-on device 1 includes SIDACs (Silicon Diode for Alternating Current) S1 to Sn provided in pairs with light emitting diodes LED1 to LEDn (n: an arbitrary integer of ≥3), and an overcurrent suppression portion 11. The overcurrent suppression portion 11 includes resistances R1, R2, a Zener diode ZD, and a switch element Q and constitutes a so-called overcurrent suppression circuit.
Inventors:
KOKUBU MASAO
TAGUCHI HIDEMASA
SHIBATA YUKIHIRO
TAGUCHI HIDEMASA
SHIBATA YUKIHIRO
Application Number:
JP2009260693A
Publication Date:
June 02, 2011
Filing Date:
November 16, 2009
Export Citation:
Assignee:
SHINDENGEN ELECTRIC MFG
International Classes:
H01L33/00; H05B37/02
Domestic Patent References:
| JP2008131007A | 2008-06-05 | |||
| JP2002025784A | 2002-01-25 | |||
| JP2006012622A | 2006-01-12 | |||
| JP2006210271A | 2006-08-10 | |||
| JP2005019108A | 2005-01-20 | |||
| JP2001155884A | 2001-06-08 | |||
| JP2000277277A | 2000-10-06 | |||
| JPS5546225A | 1980-03-31 | |||
| JPS5980252A | 1984-05-09 | |||
| JP2002335012A | 2002-11-22 |
Attorney, Agent or Firm:
Kiyoshi Kato