Title:
複数のLEDを有する照明装置
Document Type and Number:
Japanese Patent JP2011529419
Kind Code:
A
Abstract:
A light generating device (20) comprises: -an input for receiving a DC input voltage (Vin) of varying magnitude; -a controllable current source (40); -a switch matrix (30) comprising a plurality of controllable switches (S1-SN); -a plurality of n LEDs (D1, D2, . . . Dn) connected to output terminals of the switch matrix (30); -a controller (50) controlling said switches and controlling the current generated by the current source dependent on the momentary value of the DC input voltage (Vin). The controller is capable of operating in at least three different control states. In a first control state all LEDs are connected in parallel. In a second control state all LEDs are connected in series. In a third control state at least two of said LEDs are connected in parallel while also at least two of said LEDs are connected in series.
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Inventors:
Sauerlaendel Georg S
Radel McAll Harald J. G.
Radel McAll Harald J. G.
Application Number:
JP2011520635A
Publication Date:
December 08, 2011
Filing Date:
July 23, 2009
Export Citation:
Assignee:
Koninklijke Philips Electronics N.V.
International Classes:
B60Q1/44; B60Q1/34; H05B44/00; F21S8/10; H01L33/00; F21Y101/02
Domestic Patent References:
| JP2004119422A | 2004-04-15 | |||
| JP2006147933A | 2006-06-08 | |||
| JP2003208993A | 2003-07-25 |
Attorney, Agent or Firm:
Susumu Tsugaru
Fueda Shusen
Fueda Shusen