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. 10, 2012
Filed:
Apr. 24, 2009
Takashi Hoshimure, Oamishirasalo, JP;
Tetsuo Asano, Mobara, JP;
Hiroki Yamamoto, Hitachi, JP;
Takashi Naito, Funabashi, JP;
Takashi Hoshimure, Oamishirasalo, JP;
Tetsuo Asano, Mobara, JP;
Hiroki Yamamoto, Hitachi, JP;
Takashi Naito, Funabashi, JP;
Hitachi Displays, Ltd., Chiba, JP;
Abstract
An object of the present invention is to provide fluorescent lamps used as a light source for liquid crystal display devices, which have excellent characteristics in terms of preventing solarization, the properties for blocking ultraviolet rays, and the physical and thermal strength, and preventing scratching. The present invention provides fluorescent lamps made of glass containing 55.0% to 75.0% of SiO; 10.0% to 25.0% of BO; 1.0% to 10.0% of AlO; 0% to 3.8% of NaO; 0% to 3.0% of LiO; 3.0% to 10.0% of KO; 3.2% to 16.0% of NaO+LiO+KO; 0.5% to 8% of TiO; 0.1% to 5% of CeO; 0.6% to 8.1% of TiO+CeO; 0.001% to 0.05% of FeO; 0% to 0.7% of SbO; 0.1% to 3.0% of SnO; and 0.5% to 10.0% of at least one rare earth element selected from the group consisting of Gd, Y, La, Yb and Lu by weight, and is characterized in that the coefficient of linear expansion in a temperature range of 30° C. to 380° C. is 34×10/° C. to 58×10/° C.