Title:
照明装置
Document Type and Number:
Japanese Patent JP2008546139
Kind Code:
A
Abstract:
The present invention relates to a lighting device comprising a light-guide arrangement in which inputted light from at least one light source is propagated through and at least partly confined within the light-guide arrangement by means of total internal reflection. The light-guide arrangement comprises first (6) and second (7) light-guide plates and an intermediate layer (8) having a refractive index which is lower than the refractive index of said first light-guide plate (6) , said first light-guide plate (6) being arranged to receive light from said at least one light source. The second (7) light-guide plate comprises an out-coupling structure (10) to output and collimate light from the lighting device. This light-guide arrangement provides an improved lateral light-intensity averaging effect, such that light is more uniformly emitted from the output surface of the lighting device, even if said at least one light source is point or line-shaped.
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Inventors:
Marla Johann
Debble Dirk Kazy
Debble Dirk Kazy
Application Number:
JP2008512989A
Publication Date:
December 18, 2008
Filing Date:
May 19, 2006
Export Citation:
Assignee:
Koninklijke Philips Electronics N.V.
International Classes:
F21V5/00; F21S2/00; F21V8/00; G02B5/00; G02B6/00; G02F1/13357; F21Y101/02; F21Y103/00
Domestic Patent References:
| JP2002109934A | 2002-04-12 | |||
| JP2001110218A | 2001-04-20 | |||
| JP2005107020A | 2005-04-21 | |||
| JP2004031312A | 2004-01-29 | |||
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| JP2003332068A | 2003-11-21 | |||
| JP2002075657A | 2002-03-15 | |||
| JPH10189237A | 1998-07-21 | |||
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Foreign References:
| WO2004027467A1 | 2004-04-01 |
Attorney, Agent or Firm:
Susumu Tsugaru
Akihiko Miyazaki
Fueda Shusen
Akihiko Miyazaki
Fueda Shusen