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:
Aug. 14, 1990
Filed:
Feb. 08, 1989
Shunpei Yamazaki, Tokyo, JP;
Takashi Inujima, Atsugi, JP;
Kazuo Urata, Atsugi, JP;
Mamoru Tashiro, Tokyo, JP;
Yuji Tanamura, Machida, JP;
Shinji Imato, Atsugi, JP;
Kenji Itoh, Machida, JP;
Seiichi Odaka, Hisakata, JP;
Shigenori Hayashi, Atsugi, JP;
Naoki Hirose, Atsugi, JP;
Semiconductor Energy Laboratory Co., Ltd., Atsugi, JP;
Abstract
A mercury-vapor lamp is provided with a reservoir in which a superfluous amount of mercury is stored in the form of liquid state. The liquid mercury in the reservoir is cooled to a certain temperature. The pressure of mercury-vapor is automatically reduced to the saturated pressure of the liquid mercury cooled. In this configuration, the pressure of mercury-vapor is controlled by adjusting the temperature of the liquid mercury stored in the reservoir.