Liquid crystal cells – elements and systems – Particular structure – Particular illumination
Reexamination Certificate
2008-03-03
2009-11-24
Nelms, David (Department: 2871)
Liquid crystal cells, elements and systems
Particular structure
Particular illumination
Reexamination Certificate
active
07623198
ABSTRACT:
The present invention provides a light source apparatus less costly, capable of being reduced in size and thickness and superior in light combining performance and a display apparatus having the light source apparatus. The light source apparatus has a plurality of light sources different in emission wavelength from each other and a prism sheet having a plurality of mutually parallel fine elongated prisms on at least one surface thereof. Lights from the light sources enter the prism sheet through a light entrance surface of the prism sheet at a predetermined angle and output from an exit surface thereof as color-mixed exiting light. A bandpass mirror is disposed between each light source and the prism sheet to transmit light in a wavelength region emitted from the associated light source and to reflect light in the other wavelength regions.
REFERENCES:
patent: 2006/0158080 (2006-07-01), Nakano et al.
patent: 63-132215 (1988-06-01), None
patent: 2002-244211 (2002-08-01), None
Noba, U.S. Application entitled “Light Source Apparatus”, U.S. Appl. No. 11/963,529, filed Dec. 21, 2007 (12820/59).
Brinks Hofer Gilson & Lione
Citizen Electronics Co. Ltd.
Nelms David
Vu Phu
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