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:
Jun. 12, 2001
Filed:
May. 14, 1998
Chiyoaki Iijima, Nagano-ken, JP;
Toshihiko Tsuchihashi, Nagano-ken, JP;
Seiko Epson Corporation, Tokyo, JP;
Abstract
An upper polarized-light separator is provided on a STN liquid crystal to provide a display device using a polarization-changing optical element. A light source is provided between the upper polarized-light separator and the STN liquid crystal. Plane-polarized light parallel to the drawing passes through the upper polarized-light separator. Plane-polarized light perpendicular to the drawing is reflected by the upper polarized-light separator, goes towards the interior of the liquid crystal display device, and passes through the upper polarized-light separator to be emitted towards the observation side after repeated reflection in the liquid crystal display device, resulting in a brighter display.