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:
Nov. 17, 2015
Filed:
Feb. 21, 2013
Panasonic Corporation, Osaka, JP;
Yasuhiro Tanaka, Hyogo, JP;
Katsuhiko Hayashi, Nara, JP;
Abstract
An image display apparatus makes the emission angle range of emitted light bilaterally symmetrical, at low cost, irrespective of the material refractive index of a prism composing a liquid crystal prism. The image display apparatus includes an image display panel , a backlight device located on a back surface side of the image display panel, a liquid crystal prism element located between the image display panel and the backlight device, an offset optical element located between the image display panel and the backlight device and configured to deflect light incident thereon, a position detection section configured to detect a viewing position of a viewer, and a control section configured to control a voltage applied to a liquid crystal prism element, in accordance with the viewing position detected by the position detection section.