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. 03, 2007
Filed:
Nov. 02, 2004
Applicants:
Kazuhiro Matsuo, Takatsuki, JP;
Kenji Yamada, Fukuchiyama, JP;
Inventors:
Kazuhiro Matsuo, Takatsuki, JP;
Kenji Yamada, Fukuchiyama, JP;
Assignee:
Matsushita Electric Industrial Co., Ltd., Osaka-Fu, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H01J 17/16 (2006.01);
U.S. Cl.
CPC ...
Abstract
A cold cathode fluorescent lamp includes a light-emitting tube made from borosilicate glass doped with 5.1–9.0 wt % of an ultraviolet light absorbent, the light-emitting tube having phosphors coated on an inner surface thereof, and mercury and a rare gas enclosed therein. As a result, 313 nm UV light in addition to 254 nm UV light is sufficiently blocked, thus enabling the provision of cost-effective CCFLs that do not readily cause a reduction in the surface brightness of backlight units.