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 6650472 B1

PDF
Full Text
Expired
Date of Patent:
Nov. 18, 2003

Filed:

Jan. 10, 2001
Applicant:
Inventors:

Masaya Adachi, Hitachi, JP;

Makoto Tsumura, Hitachi, JP;

Ikuo Hiyama, Hitachi, JP;

Tetsuro Minemura, Hitachioota, JP;

Assignee:

Hitachi, Ltd., Tokyo, JP;

Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G03B 2/160 ; G03B 2/156 ;
U.S. Cl.
CPC ...
G03B 2/160 ; G03B 2/156 ;
Abstract

It is possible eliminate a fringe pattern produced at the time of incidence of polarized light of a light distribution control element, in which stray light derived from outside unnecessary light in a liquid crystal display apparatus or the like can be effectively reduced, and bright, wide viewing angle characteristics can be achieved when the display is viewed at any angle by an observer. In a light distribution control element constituted of a transparent base member, an array of a plurality of micro-lenses (transparent beads) densely arranged on the transparent base member and a light absorbing layer having very small opening portions substantially at focal positions of the micro-lenses, the transparent base member is constituted of a transparent body which is substantially isotropic optically or a transparent body having uniaxial optical anisotropy.


Find Patent Forward Citations

Adachi, Masaya. (2003). Luminous intensity distribution control device and display having the same (U.S. Patent No. 6650472). U.S. Patent and Trademark Office. https://idiyas.com/patent/badge/6650472

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