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.:

US 8675283 B1

PDF
Full Text
Expired
Date of Patent:
Mar. 18, 2014

Filed:

Aug. 24, 2012
Applicants:

Takayuki Fujikawa, Nagoya, JP;

Hiroshi Ando, Nagoya, JP;

Inventors:

Takayuki Fujikawa, Nagoya, JP;

Hiroshi Ando, Nagoya, JP;

Assignee:

Denso Corporation, Kariya, JP;

Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G02B 27/01 (2006.01); G02B 5/02 (2006.01);
U.S. Cl.
CPC ...
Abstract

A screen member diffuses a bundle of rays of light projected from a laser scanner such that the bundle of rays of light is guided to a viewing range. The screen member includes a plurality of optical elements. A surface of each optical element forms a curved surface that diffuses the bundle of rays of light, which enters the curved surface. The optical elements are arranged in a lattice pattern at each corresponding pitch that is set to adjust a peak-to-peak interval of diffracted rays, which are formed in the viewing range by diffraction of the bundles of rays diffused by the plurality of optical elements, to a value that is equal to or smaller than a diameter of a pupil of the viewer.


Find Patent Forward Citations

Fujikawa, Takayuki. (2014). Head-up display apparatus, screen member, manufacturing method thereof and image projecting method (U.S. Patent No. 8675283). U.S. Patent and Trademark Office. https://idiyas.com/patent/badge/8675283

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