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:
Dec. 31, 1996
Filed:
Apr. 25, 1995
Hiroyuki Ueda, Hyogo, JP;
Mitsubishi Denki Kabushiki Kaisha, Tokyo, JP;
Abstract
A discharging lamp lighting apparatus is provided to perform lighting control of high voltage discharging lamps such as high pressure sodium lamp or metal halide lamp. In the discharging lamp lighting apparatus, a control section determines a power control pattern balancing with stored discharging lamp stable voltage so as to perform power control of the discharging lamp according to the pattern. If no voltage is stored, the control section performs the power control according to a power control pattern balancing with the minimum rated voltage of the discharging lamp. Then, it is possible to store the voltage when the discharging lamp is stabilized. If the discharging lamp is exchanged, the control section erases contents in stable voltage storing means so as to perform the lighting control of the discharging lamp from an initial state. As a result, the discharging lamp lighting apparatus can continuously perform the lighting control with the optimal rise characteristic of the amount of light even if characteristics of the discharging lamp may be varied due to, for example, degradation thereof.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile