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:
Apr. 20, 2004
Filed:
Nov. 21, 2001
Masahiro Kuroiwa, Suwa, JP;
Seiko Epson Corporation, , JP;
Abstract
A polarizer in a light-incident optical system includes a polarized-light polarization axis parallel to a predetermined direction. As a result of the passage of light through the polarizer linearly polarized light Li including a vibration plane that includes the direction of the polarized-light polarization axis is formed, and is incident upon a liquid crystal panel at an incident angle &thgr;i. On the other hand, a detecting optical system is set so as to detect specularly reflected light formed as a result of the reflection of the linearly polarized light Li that has impinged upon the liquid crystal panel at the incident angle &thgr;i. The specularly reflected light that exits from the liquid crystal panel at an exiting angle &thgr;o that is substantially equal to the incident angle &thgr;i is incident upon a polarizer and is eventually guided to a light detector . The polarizer includes a polarized-light absorption axis parallel to the polarized-light polarization axis of the polarizer with a light path serving as a reference.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile