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:
Jul. 17, 2007
Filed:
Jul. 30, 2003
Tetsuya Nagata, Mobara, JP;
Koji Hiraga, Ooamishirasato, JP;
Masao Uehara, Mobara, JP;
Koichi Fukuda, Mobara, JP;
Tetsuya Nagata, Mobara, JP;
Koji Hiraga, Ooamishirasato, JP;
Masao Uehara, Mobara, JP;
Koichi Fukuda, Mobara, JP;
Hitachi Displays, Ltd., Mobara-Shi, JP;
Abstract
In a liquid crystal display device the reflection of light from a transmissive region is reduced, the contrast of images is enhanced and a display of inverted images is suppressed. The liquid crystal display device includes a first background film made of silicon nitride and a second background film made of silicon oxide over a glass substrate, and thin film transistors and light transmissive pixel portions are formed over the second background film. Each thin film transistor is constituted of a polysilicon film, a gate electrode, a drain electrode and a source electrode, while a gate insulation film, an interlayer insulation film and an organic film are formed over the pixel portion. Further, in the liquid crystal display device external light is reflected, wherein by forming the first background film thicker than the second background film, the inversion of images of a transmissive type liquid crystal panel can be suppressed.