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Title:
COLOR LED DRIVE UNIT
Document Type and Number:
Japanese Patent JP2007201473
Kind Code:
A
Abstract:

To provide a color LED drive unit capable of compensating fluctuation in the characteristics of a color LED due to a temperature change.

The color LED drive includes: a drive constant voltage 100 for supplying a preset drive constant voltage VD; a drive circuit 200 for converting the drive constant voltage VD to a plurality of drive currents; a temperature compensator 300 for compensating variations due to a temperature change in a drive current Ird for red LEDs and a drive current Igd for green LEDs in a plurality of drive currents from the drive circuit 200; and an LED 400 including a plurality of color LEDs lit by the drive currents, thus compensating temperature by utilizing NTC thermistors TH21, TH22 in the temperature compensator 300.

COPYRIGHT: (C)2007,JPO&INPIT


Inventors:
LEE DONG WOO
Application Number:
JP2007013585A
Publication Date:
August 09, 2007
Filing Date:
January 24, 2007
Export Citation:
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Assignee:
SAMSUNG ELECTRO MECH
International Classes:
H01L33/00; H05B37/02; H05B44/00
Domestic Patent References:
JP2001287398A2001-10-16
JP2007095291A2007-04-12
JP2007134194A2007-05-31
JP2007165632A2007-06-28
JP2002237645A2002-08-23
JPH11298044A1999-10-29
JP2006237282A2006-09-07
JP2006135007A2006-05-25
Foreign References:
WO2005011006A12005-02-03
WO2006006537A12006-01-19
Attorney, Agent or Firm:
Hidekazu Miyoshi
Masakazu Ito
Yuko Hara



 
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