The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Sep. 01, 2015
Filed:
Oct. 26, 2010
Tadayoshi Kosaka, Yokohama, JP;
Satoshi Ouchi, Kamakura, JP;
Mayumi Nagayoshi, Chofu, JP;
Yoshiho Seo, Yokohama, JP;
Tomoki Kobori, Kamakura, JP;
Tadayoshi Kosaka, Yokohama, JP;
Satoshi Ouchi, Kamakura, JP;
Mayumi Nagayoshi, Chofu, JP;
Yoshiho Seo, Yokohama, JP;
Tomoki Kobori, Kamakura, JP;
Hitachi Maxwell, Ltd., Osaka, JP;
Abstract
A projector using coherent light as a light source includes: one or more coherent light sources emitting coherent light beams; a beam scanner which changes a direction of the coherent light beam; and a beam splitter which splits a beam into multiple segments and changes a phase of light of each split segment, the beam splitter being located in an optical path between the beam scanner and the coherent light source. This projector reduces speckle noises. The beam splitter includes a pair of transparent substrates; a plurality of parallel electrodes disposed on each surface of the pair of transparent substrates, the pair of the parallel electrodes being disposed in a perpendicular direction to each other. Voltages are applied to the respective electrodes at predetermined time intervals so as to produce different potentials in a liquid crystal sandwiched by the transparent substrates.