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:
Sep. 28, 2010
Filed:
Jun. 06, 2006
Yasunori Ootsuka, Tokyo, JP;
Naohito Sato, Tokyo, JP;
Yasunori Ootsuka, Tokyo, JP;
Naohito Sato, Tokyo, JP;
Mitsubishi Electric Corporation, Tokyo, JP;
Abstract
A discharge lamp ballast apparatus includes a fault detecting sectionof a discharge lamp; a first storing sectionfor storing a fault detected; a lighting delay detecting section-for detecting lighting delay time from beginning of starting operation to lighting of the discharge lamp; a reigniting voltage measuring section-for measuring a discharge lamp voltage immediately after switching of polarity applied to the discharge lamp according to AC lighting; a measuring section-for measuring a period of time during which a current does not flow by detecting a discharge lamp current immediately after switching the polarity applied to the discharge lamp according to the AC lighting; a going out counting section-for counting a number of times of going out by detecting going out during lighting of the discharge lamp; and a second storing sectionfor storing the lighting delay, reigniting voltage, period of time during which the current does not flow, and number of times of going out as operation records.