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. 22, 2004
Filed:
May. 24, 2002
Sony Corporation, Tokyo, JP;
Abstract
A liquid crystal display device where a liquid crystal section is vertically oriented with respect to both a first substrate capable of transmitting light and a second substrate which includes a reflecting region and a transmitting region. A pair of retardation films are disposed on both sides of the vertically oriented liquid crystal section, and have symmetrical phase characteristics over a visible wavelength region. Lagging phase axes of the pair of retardation films intersect each other, with an intersecting angle thereof being set in a range of from 90°±10°. Relative shifts in phase differences of the pair of retardation films are controlled within a range of ±30 nm. The reflective-and-transmissive liquid crystal display device makes it possible to provide, a high contrast and a high transmittance ratio in a transmission display mode and, a high contrast and a high reflection ratio in a reflection display mode.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile