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:
Jan. 11, 2005
Filed:
Jul. 09, 2001
Ken Sumiyoshi, Tokyo, JP;
Hiroshi Hayama, Tokyo, JP;
Ken Sumiyoshi, Tokyo, JP;
Hiroshi Hayama, Tokyo, JP;
NEC Corporation, Tokyo, JP;
Abstract
A liquid crystal display device comprising a first polarizing sheet (), a color filter layer () formed on glass sheet (), a second polarizing sheet (), three-layered HPDLC () formed below the liquid crystal layer () and acting as a reflective structural layer having a reflectivity changed electrically, and a backlight unit as the lowermost layer. Each layer of the three-layered HPDLC () is composed of a liquid crystal droplet layer polymer layer and reflects blue, green, red by Bragg reflection. When voltage is applied to the three-layered HPDLC (), the reflectivity of liquid crystal droplet layer of each layer change, so that the HPDLC can be made transparent by equalizing the reflectivities of the liquid crystal liquid droplet layer to those of polymer layers.