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. 30, 2000
Filed:
Feb. 19, 1998
Hisao Kitai, Kanagawa, JP;
Sony Corporation, , JP;
Abstract
A liquid crystal display device and a liquid crystal projector using the same are provided for suppressing reduction in liquid crystal properties due to heat and light by precisely shielding light in regions other than a region irradiated with light corresponding to effective pixels. Light-shielding substrates are each brought to absolute contact with a back of a drive substrate and a front of an opposed substrate, respectively. One of the light-shielding substrates is provided with a frame-shaped light-shielding film formed in a region on a surface of a transparent substrate opposed to a non-irradiated region in the drive substrate. Similarly, the other of the light-shielding substrates is provided with a frame-shaped light-shielding film formed in a region on a surface of a transparent substrate opposed to a non-irradiated region in the opposed substrate. The light-shielding films each have an excellent light-shielding property with optical density of 3.0 or above, for example. The light-shielding films are thinly formed in order to suppress stress strain, that is, warpage of glass, due to an adhesive for bonding the light-shielding films to the drive substrate and the opposed substrate, respectively. The light-shielding films are made of a conductive film such as aluminum (Al) and grounded. As a result, the light-shielding films have a function of electrically shielding the liquid crystal display device besides the light-shielding function.