High efficiency projection displays having thin film polarizing beam-splitters

Number of patents in Portfolio can not be more than 2000

United States of America Patent

PATENT NO 5982541
SERIAL NO

09051403

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ATTORNEY / AGENT: (SPONSORED)

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Abstract

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A projection display system includes a thin film polarizing beam splitter/combiner has first and second light transmissive substrates in the form of prisms and a plurality of thin film layers disposed between the prisms. The thin film layers and have predetermined thicknesses and refractive indices which allow unpolarized incident light to be separated into s-polarized and p-polarized light beams. Both frustrated total internal reflection and thin film interference are simultaneously employed to allow s-polarized light to be transmitted and p-polarized light to be reflected over a wide range of wavelengths and angles of incidence. The device further includes two spatial light modulators for encoding an image to be projected. By providing a different signal to each spatial light modulator, a three-dimensional display results.

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Patent Owner(s)

Patent OwnerAddressTotal Patents
NATIONAL RESEARCH COUNCIL OF CANADAOTTAWA ONTARIO476

International Classification(s)

Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Dobrowolski, Jerzy A Ottawa, CA 14 795
Li, Li Orleans, CA 919 8353
Sullivan, Brian Thomas Gloucester, CA 11 77

Cited Art Landscape

Patent Info (Count) # Cites Year
 
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Thomson-CSF (1)
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MATSUSHITA ELECTRIC INDUSTRIAL CO., LTD. (1)
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* Cited By Examiner

Patent Citation Ranking

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Patent Info (Count) # Cites Year
 
Other [Check patent profile for assignment information] (4)
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GOOGLE LLC (1)
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CFPH, LLC (3)
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DUKE UNIVERSITY (3)
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Zhejiang Estar Display Tech Co., Ltd. (1)
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Boothroyd, Simon Andrew (2)
7690794 Image-combining device and projection display apparatus having image-combining devices incorporated therein 5 2007
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NATIONAL RESEARCH COUNCIL OF CANADA (2)
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* Cited By Examiner