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. 25, 2000
Filed:
Aug. 25, 1997
Applicant:
Inventors:
Assignee:
Nippon Sheet Glass Co., Ltd., Osaka, JP;
Primary Examiner:
Int. Cl.
CPC ...
F21S / ;
U.S. Cl.
CPC ...
362223 ; 362255 ;
Abstract
In a line illumination device, a light source is provided at one end of a rod-like transparent light guiding member, for maintaining high and uniform illuminance, and the shape of a light scattering pattern 11 has: a first portion 11a gradually increasing in area from one end to the other end thereof; a second portion 11b continuous with the first portion 11a and increasing in area in the direction towards the other end at a higher rate than that of the first portion; and a third portion 11c continuous with the second portion 11b and extending towards the other end at a maximum width of the second portion 11b.