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Patent Searching and Data


Title:
LED ARRAY SYSTEMS
Document Type and Number:
WIPO Patent Application WO2005119314
Kind Code:
A3
Abstract:
A light emitting diode (LED) array comprises an array of LEDs mounted to a substrate. The LEDs emit light in a direction generally perpendicular to the substrate (308). An optical sheet is disposed over the LEDs (320). At least a portion of light entering one side of the optical sheet from the LEDs is guided within the optical sheet in a direction generally parallel to the substrate. Light extraction features (324) direct light from the optical sheet in a generally forward direction. Such an array is useful for several applications, including space lighting, direct information display and backlighting of liquid crystal displays. The light spreading effect of the optical sheet reduces the amount of black space between LED pixels.

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Inventors:
EPSTEIN KENNETH A (US)
TRAN HUNG T (US)
SCHULTZ JOHN C (US)
EMMONS ROBERT M (US)
Application Number:
PCT/US2005/017851
Publication Date:
February 23, 2006
Filing Date:
May 20, 2005
Export Citation:
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Assignee:
3M INNOVATIVE PROPERTIES CO (US)
International Classes:
F21V8/00; G02F1/13357; G09F9/33; G09F9/35; H01L33/48; H01L33/58; H01L33/60; H01L33/62; G02B6/00; (IPC1-7): G02B6/00; G09F9/33; G02F1/13357
Domestic Patent References:
WO2004008233A12004-01-22
Foreign References:
US4679044A1987-07-07
US20040056989A12004-03-25
US5005108A1991-04-02
EP0426411A21991-05-08
US20030123247A12003-07-03
US5678335A1997-10-21
US4274217A1981-06-23
Other References:
See also references of EP 1751592A2
Download PDF:
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