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Title:
LED ILLUMINATION DEVICE
Document Type and Number:
WIPO Patent Application WO/2007/099860
Kind Code:
A1
Abstract:
An LED illumination device has a light emission module made up of plural kinds of LEDs having different emission colors, a lens unit having a lens for diffusing light of mixed colors from the light emission module, a light output controller for controlling an electric current to be conducted to each LED, and a device light sensor for detecting the light emitted from the light emission module. The light output controller feedback controls, based on an output level of the light detected, the electric current to each LED so that the light emitted from the light emission module has a predetermined color. A light guide for guiding the light from the lens to the device light sensor is integrally formed with the lens unit and efficiently guides the light from the light emission module to the device light sensor.

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Inventors:
TANAKA, Kenichiro (1048, Oaza-Kadom, Kadoma-shi Osaka 86, 5718686, JP)
田中 健一郎 (〒86 大阪府門真市大字門真1048番地 松下電工株式会社内 Osaka, 5718686, JP)
IWAHORI, Yutaka (1048, Oaza-Kadom, Kadoma-shi Osaka 86, 5718686, JP)
Application Number:
JP2007/053320
Publication Date:
September 07, 2007
Filing Date:
February 22, 2007
Export Citation:
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Assignee:
MATSUSHITA ELECTRIC WORKS, LTD. (1048, Oaza-Kadoma Kadoma-shi Osaka, 86, 5718686, JP)
松下電工株式会社 (〒86 大阪府門真市大字門真1048番地 Osaka, 5718686, JP)
TANAKA, Kenichiro (1048, Oaza-Kadom, Kadoma-shi Osaka 86, 5718686, JP)
田中 健一郎 (〒86 大阪府門真市大字門真1048番地 松下電工株式会社内 Osaka, 5718686, JP)
International Classes:
H05B37/02; F21S8/04; F21V5/04; F21V23/00; F21Y101/02
Domestic Patent References:
2000-06-29
Foreign References:
JP2002344031A2002-11-29
JP2003068130A2003-03-07
JP2005019066A2005-01-20
JP2006019263A2006-01-19
JP2006040764A2006-02-09
US20020130326A12002-09-19
Other References:
See also references of EP 1988752A1
Attorney, Agent or Firm:
NISHIKAWA, Yoshikiyo et al. (Hokuto Patent Attorneys Office, Umeda-Daiichiseimei Bldg. 5F 12-17, Umeda 1-chome, Kita-ku, Osaka-sh, Osaka 01, 5300001, JP)
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