Title:
二色性の表面を備えた照明系
Document Type and Number:
Japanese Patent JP2010514151
Kind Code:
A
Abstract:
A high efficiency lighting system (100) is described that has a small etendue. This can be used, for example, for backlighting a display device such as a liquid crystal display (LCD), projection displays, as well as for general lighting purposes. A portion of the light from a light emitting device die (101) falls onto a fluorescent material (105,106), such as phosphor. Dichroic mirrors (107,109) prevent the light generated by the fluorescent material to return to the light-emitting device. The mirrors may also provide collimation of the generated light and the remainder of the light from the light-emitting device. In this way a high efficiency system is realized because little or no generated light is absorbed and the generated light does not have to travel through a fluorescent material layer and thus has a high chance to go in the desired direction.
Inventors:
Van Holcombe, Ramon Phe
Daine, Peter
Cornelissen, Hugo Yeah
Daine, Peter
Cornelissen, Hugo Yeah
Application Number:
JP2009540947A
Publication Date:
April 30, 2010
Filing Date:
December 11, 2007
Export Citation:
Assignee:
Koninklijke Philips Electronics N.V.
International Classes:
H01L33/60; F21K99/00; F21S2/00; F21V7/00; F21V7/22; F21V9/16; G02F1/13357; H01L33/50; F21Y101/02; H01L33/44
Attorney, Agent or Firm:
Tadahiko Ito
Shinsuke Onuki
Tadashige Ito
Shinsuke Onuki
Tadashige Ito