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:
Apr. 02, 2002
Filed:
Nov. 02, 2000
Seiji Umemoto, Osaka, JP;
Toshihiro Ariyoshi, Osaka, JP;
Takao Suzuki, Osaka, JP;
Hideo Abe, Osaka, JP;
Nitto Denko Corporation, Osaka, JP;
Abstract
In a light pipe unit, a surface light pipe includes at least upper and lower surfaces and connected side surfaces constituted by an incident side surface formed between the upper and lower surfaces and side surfaces adjacent to the incident side surface. A linear light pipe includes a light supply surface, and the surface light pipe is connected to the linear light pipe through the connected side surfaces and the light supply surface so that the linear light pipe converts incident light from a point light source into a linear light source and outputs the light of the linear light source through the light supply surface. The surface light pipe converts incident light from the linear light source into a plane light source. In another light pipe unit, a linear light pipe for converting incident light from a point light source into a linear light source, and a surface light pipe for converting incident light from the linear light source into a plane light source are provided. The linear light pipe and the surface light pipe are partially connected to each other. Further, a plane light source unit wherein a point light source is disposed on the linear light pipe of one of the above light pipe units and a liquid-crystal display device provided with the above-mentioned plane light source unit and a liquid crystal cell are provided.