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:
May. 22, 2001
Filed:
Apr. 25, 1997
Tetsuya Yagi, Kanagawa, JP;
Isao Sawachika, Kanagawa, JP;
Sony Corporation, Tokyo, JP;
Abstract
The characteristic of a visual-field angle is improved by improving a characteristic of the contrast of a liquid-crystal display element employed in a head mounted display apparatus which is used as an optical visualizing apparatus mounted on the head of an image viewer for viewing an image appearing in front of both eyes of an image viewer. The liquid-crystal display element for displaying an image comprises a liquid-crystal board as well as first and second polarizing boards sandwiching the liquid-crystal board wherein the polarization directions of the first and second polarizing boards are inclined in a slanting orientations so that the contrast characteristic in the horizontal direction can be kept unchanged while the characteristic of the contrast in the vertical direction can be changed. In this way, the angle of the visual field can be enhanced.