Title:
発光ダイオードの駆動方法
Document Type and Number:
Japanese Patent JP5485868
Kind Code:
B2
Abstract:
Disclosed is a driver that includes a main power supply that has outputs coupled across a string of light emitting diodes to supply a main current. A secondary power supply is coupled to a junction between successive light emitting diodes in the string to supply or withdraw a delta current from the junction. The delta current is at least five times smaller than the main current. A controller controls the secondary power supply to generate the delta current to obtain a desired spectral composition of the mixed light emitted by the string.
Inventors:
Peters Henrix M
Van waudenberg bell
Bremer Petrus Jay
Van waudenberg bell
Bremer Petrus Jay
Application Number:
JP2010501631A
Publication Date:
May 07, 2014
Filing Date:
March 31, 2008
Export Citation:
Assignee:
KONINKLIJKE PHILIPS N.V.
International Classes:
H01L33/00; H05B44/00; G02F1/133; G09G3/20; G09G3/34; G09G3/36; H05B37/02
Domestic Patent References:
| JP2004029370A | ||||
| JP2007066897A | ||||
| JP5063283A | ||||
| JP2007110075A | ||||
| JP2008090270A | ||||
| JP2006278125A |
Foreign References:
| US20050243022 |
Attorney, Agent or Firm:
Susumu Tsugaru
Fueda Shusen
Fueda Shusen