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:
Mar. 02, 1993
Filed:
Feb. 15, 1990
Tohru Futami, Kanagawa, JP;
Masao Sakata, Kanagawa, JP;
Tsuyoshi Todoriki, Kanagawa, JP;
Tomio Kusagaya, Kanagawa, JP;
Nissan Motor Co., Ltd., Kanagawa, JP;
Abstract
A circuit and method for controlling a discharge lamp without auxiliary lamp(s) are disclosed. The discharge lamp is controlled in a warmed-up arc discharge state when, e.g., power generation of a vehicular alternator is detected. The discharge lamp is transferred from the warmed-up discharge state to an illumination arc discharge state when, e.g., an inner temperature of the discharge lamp has arrived at a predetermined value. The control of warmed-up discharge state is abruptly carried out when, e.g., the internal temperature of the discharge lamp is below the predetermined temperature. A time at which the discharge lamp is to be turned off is controlled according to the internal temperature of the other discharge lamp to be turned on.