Optical waveguides – With optical coupler – Input/output coupler
Reexamination Certificate
2005-01-26
2009-08-25
Rahll, Jerry T (Department: 2874)
Optical waveguides
With optical coupler
Input/output coupler
C359S739000, C362S552000, C362S559000
Reexamination Certificate
active
07580603
ABSTRACT:
Aspects of the invention can provide an illumination device capable of preventing or reducing a reduction in efficiency of utilization of lights emitted from the light source, and also suitable to display high-quality moving images, and a display device and a projection type display device using this illumination device. The illumination device can include a light source to emit lights, a homogeneous light guiding device for making intensity distributions of incident lights homogeneous, a reflecting device, disposed on a light incident end face side of the homogeneous light guiding device and provided with an aperture to allow the lights to come incident, for reflecting lights to an inside of the homogenous light guiding device in a region other than the aperture, a reflection variable diaphragm device, disposed on a light exiting end face side of the homogenous light guiding device, for forming a variable aperture in which an area of an aperture region varies and, in a region other than the aperture region, reflecting the lights to the inside of the homogeneous light guiding device, a light scanning device for scanning lights emitted from the reflection variable diaphragm device on a subject to be illuminated.
REFERENCES:
patent: 6714362 (2004-03-01), Nomura et al.
patent: 7131736 (2006-11-01), Bierhuizen
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patent: 2004-004613 (2004-01-01), None
T. Kurita “Display System of Hold Type Display and Picture Quality Upon Displaying Motion Picture,”Proceedings of the First LCD Forum,pp. 1-20, Aug. 1998.
Oliff & Berridg,e PLC
Rahll Jerry T
Seiko Epson Corporation
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