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. 02, 2006
Filed:
Dec. 18, 2001
Kyoichi Kubomura, Kawasaki, JP;
Masahiko Hayashi, Kawasaki, JP;
Kyoichi Kubomura, Kawasaki, JP;
Masahiko Hayashi, Kawasaki, JP;
Zeon Corporation, Tokyo, JP;
Abstract
The invention provides an illumination unit for liquid crystal display systems, which comprises an illumination light source for emitting visible light rays and a light guide plate or a light diffusion plate having an entrance surface and an exit surface. The illumination light source is located such that light rays therefrom are entered into the light guide plate or light diffusion plate from the entrance surface. The light guide plate or light diffusion plate is formed of a transparent synthetic resin. The maximum intensity of light in an ultraviolet range having a wavelength of 350 nm or less as measured all over the entrance surface of the light guide plate or light diffusion plate is 2 μW/(cm·nm) or less. The illumination light source has a maximum emission intensity of 2 μW/(cm·nm) or less in an ultraviolet range having a wavelength of 350 nm or less.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile