Title:
発光ダイオード回路を備える装置
Document Type and Number:
Japanese Patent JP5519667
Kind Code:
B2
Abstract:
Devices (1) have branches (20,30) for receiving AC voltages. First branches (20) comprise first light-emitting diode circuits (21) and first arrangements for phase-shifting first currents flowing through the first light-emitting diode circuits (21) with respect to the AC voltages. Second branches (30) comprise second light-emitting diode circuits (31) and do not comprise second arrangements for phase-shifting second currents flowing through the second light-emitting diode circuits (31) with respect to the AC voltages. As a result, an overall flicker index of the device (1) will be smaller than individual flicker indices of the light-emitting diode circuits (21,31). The first arrangements may comprise capacitors (22) coupled serially to the first light-emitting diode circuits (21). The branches (20,30) may further comprise resistors (23,33) coupled serially to or forming part of the light-emitting diode circuits (21,31). The light-emitting diode circuits (21,31) generate light in response to positive and negative halves of the AC voltages.
Inventors:
La del machel halald jay
Application Number:
JP2011520631A
Publication Date:
June 11, 2014
Filing Date:
July 22, 2009
Export Citation:
Assignee:
KONINKLIJKE PHILIPS N.V.
International Classes:
H01L33/00; H05B44/00
Domestic Patent References:
| JP2004111104A | ||||
| JP2001332765A | ||||
| JP2004179045A | ||||
| JP2008502133A |
Attorney, Agent or Firm:
Susumu Tsugaru
Fueda Shusen
Fueda Shusen