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:
Oct. 28, 2003
Filed:
Sep. 21, 2001
Applicant:
Inventor:
Henry Frazier Pruett, Sandy, OR (US);
Assignee:
InFocus Corporation, Wilsonville, OR (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H01J 7/44 ;
U.S. Cl.
CPC ...
H01J 7/44 ;
Abstract
An arc discharge lamp system comprises a third electrode for igniting the arc discharge lamp in addition to first and second electrodes which provide a main discharge current path for sustaining arc discharge after the lamp has been ignited by a high-voltage, high-frequency signal applied to the third electrode. In an embodiment, an igniter circuit is connected to provide the high-voltage, high-frequency signal to the third electrode of the lamp by using a low-voltage DC power supply.