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. 29, 2007
Filed:
Feb. 23, 2004
Katsuhiko Koike, Sodegaura, JP;
Koichi Shimada, Sodegaura, JP;
Shin Fukuda, Sodegaura, JP;
Mitsui Chemicals, Inc., Tokyo, JP;
Abstract
An object of the invention is to provide a reflector using a metal thin film layer, particularly a reflector having higher reflectance than in the prior art. Specifically, studies have been made to provide a reflector which exhibits a superior reflection-increasing effect. As a result, it has been found that if the thickness of a low refractive index thin film layer (B) which comes in contact with a metal thin film layer (A) is controlled so that it is within a range of 0.7 λ/8n–1.3 λ/8n, a reflector having an arrangement of metal layer (A)/low refractive index thin film layer (B)/high refractive index thin film layer (C) exhibits reflectance which is extremely superior than in the prior art over a wide wavelength range. More specifically, it exhibits higher reflectance than a pure silver single film does, and a reflector superior in durability can be obtained. The lamp reflector, reflector under the light-guiding plate of the invention uses the above-mentioned reflector; therefore, if it is applied to each display device, high brilliance and vivid image can be realized. Further, since the liquid crystal display device of the invention uses the above-mentioned reflector, a clear vivid image can be realized.