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. 17, 2013
Filed:
Mar. 07, 2011
Atsushi Namba, Tokyo, JP;
Seiichi Anzawa, Nagano, JP;
Atsushi Namba, Tokyo, JP;
Seiichi Anzawa, Nagano, JP;
Fuji Jukogyo Kabushiki Kaisha, Tokyo, JP;
Abstract
This control device, for a representative lamp L, by way of a power control circuit, detects the cathode current Ik from a resistor TRk, and controls a high-voltage stabilizing circuit, and performs drive control so that the gate voltages, which were divided from the output voltage Vgo from the high-voltage stabilizing circuit, become suitable voltages. Moreover, the control device, for other lamps L, . . . , Ln, by way of the power control circuit, changes the voltage dividing ratio of impedance dividing by resistors R, R, . . . , Rn, Rnfor the output voltage Vgo using control elements Q, . . . , Qn, and performs control so that the cathode current of each of the lamps L, . . . , Ln becomes the same as the cathode current of the representative lamp L