Title:
単一の一纏めにされたLED色としての2つのLED色の説明
Document Type and Number:
Japanese Patent JP5069225
Kind Code:
B2
Abstract:
A light emitting diode (LED) lighting system for producing white light is disclosed. The system comprises sets of LEDs arranged to emit light with different wavelength ranges and associated with different sets of characteristics, and a driving circuit arranged to drive the LEDs. The driving circuit comprises an input for desired light intensity, color rendering index, and color temperature, an input for signals for LED temperature, a model for determining driving currents for said sets of LEDs from said parameters, signals, and characteristics for each of said sets of LEDs; and a current driver for the LEDs. At least one of the sets of LEDs comprises a first subset of LEDs with a first wavelength sub-range and a first set of characteristics, and a second subset of LEDs with a second wavelength sub-range and a second set of characteristics. A lumped wavelength range of the set of LEDs is a range of said first and second wavelength sub-ranges, and the set of characteristics of the set of LEDs is a function of said first and second sets of characteristics. A method for controlling the sets of LEDs is also disclosed.
Inventors:
Dürenberg, Peter Haev
Anthems, Johannes Page
Fullen, Christoph Heer
Anthems, Johannes Page
Fullen, Christoph Heer
Application Number:
JP2008512973A
Publication Date:
November 07, 2012
Filing Date:
May 11, 2006
Export Citation:
Assignee:
Koninklijke Philips Electronics N.V.
International Classes:
H05B37/02; H05B44/00; F21V23/00; F21V29/00; H01L33/00; F21Y101/02
Domestic Patent References:
| JP2004193029A | ||||
| JP2004515891A |
Foreign References:
| US20040183475 | ||||
| US20040021859 |
Attorney, Agent or Firm:
Tadahiko Ito
Shinsuke Onuki
Tadashige Ito
Shinsuke Onuki
Tadashige Ito