US 7,405,520 B2 | ||
Curved lamp manufacturing method, curved lamp, and backlight unit | ||
Hironobu Ueno, Takaishi (Japan); Takaharu Yanata, Ibaraki (Japan); Hayato Kameyama, Takatsuki (Japan); Yoshimitsu Mino, Souraku-gun (Japan); and Akio Kikuchi, Hirakata (Japan) | ||
Assigned to Matsushita Electric Industrial Co., Ltd., Osaka (Japan) | ||
Filed on Mar. 18, 2005, as Appl. No. 11/84,674. | ||
Claims priority of application No. 2004-083635 (JP), filed on Mar. 22, 2004; application No. 2004-096767 (JP), filed on Mar. 29, 2004; and application No. 2004-100958 (JP), filed on Mar. 30, 2004. | ||
Prior Publication US 2005/0231942 A1, Oct. 20, 2005 | ||
Int. Cl. H01J 63/04 (2006.01); H01J 9/00 (2006.01) |
U.S. Cl. 313—634 [313/493] | 6 Claims |
1. A curved lamp having at least one curved portion, the curved lamp being generated by heating and curving a straight glass
tube that was sealed with inside thereof being under reduced pressure, wherein
outer diameter of the straight glass tube ranges from 1.8 mm to 6.5 mm inclusive, thickness of the straight glass tube ranges
from 0.2 mm to 0.6 mm inclusive, and curvature radius of an inner side of the curved portion is equal to or larger than 0.5
mm and smaller than 4.0 mm.
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