Title:
BULB TYPE FLUORESCENT LAMP AND ILLUMINAIRE
Document Type and Number:
Japanese Patent JP2008226847
Kind Code:
A
Abstract:
To provide a bulb type fluorescent lamp capable of improving a light flux rising characteristic with a simple constitution, even when amalgam for controlling mercury vapor pressure is enclosed.
The temperature of a part of a light emitting tube projection projecting toward a base side can be set at a temperature having mercury vapor pressure becoming maximum in light emitting efficiency. As a result, the light flux rising characteristic just after turning-on is improved more than when using conventional amalgam low in the mercury vapor pressure, and reduction in the light emitting efficiency in turning-on can also be restrained.
Inventors:
YASUDA TAKEO
TAKAHARA YUICHIRO
IKADA KUNIHIKO
IKEDA TOSHIYUKI
ONO TETSUYA
TAKAHARA YUICHIRO
IKADA KUNIHIKO
IKEDA TOSHIYUKI
ONO TETSUYA
Application Number:
JP2008099575A
Publication Date:
September 25, 2008
Filing Date:
April 07, 2008
Export Citation:
Assignee:
TOSHIBA LIGHTING & TECHNOLOGY
International Classes:
F21S2/00; H01J61/20; H01J61/28; H01J61/56; H01J61/72; F21Y103/37
Domestic Patent References:
| JPH0785709A | 1995-03-31 | |||
| JPS6163759U | 1986-04-30 |
Attorney, Agent or Firm:
Shinji Nogi
Kumagai Masatoshi
Kumagai Masatoshi