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:
Jul. 08, 2014
Filed:
Nov. 01, 2011
Shuji Aoki, Yokohama, JP;
Takao Ogura, Sagamihara, JP;
Yasue Sato, Machida, JP;
Miki Tamura, Kawasaki, JP;
Kazuyuki Ueda, Tokyo, JP;
Ichiro Nomura, Atsugi, JP;
Shuji Aoki, Yokohama, JP;
Takao Ogura, Sagamihara, JP;
Yasue Sato, Machida, JP;
Miki Tamura, Kawasaki, JP;
Kazuyuki Ueda, Tokyo, JP;
Ichiro Nomura, Atsugi, JP;
Canon Kabushiki Kaisha, Tokyo, JP;
Abstract
An inverter circuit is shared by respective drive circuits that supply a predetermined voltage to a lens electrode and a grid electrode, or to a lens electrode and a cathode electrode. A DC voltage obtained by full-wave rectifying a pulse train output from the inverter circuit is supplied to the lens electrode, a DC voltage obtained by half-wave rectifying a pulse train output from the inverter circuit is supplied to the grid electrode or cathode electrode. At times of a first operation and a last operation of the inverter circuit during a period of generating X-rays, operations of the inverter circuit are controlled such that a trans circuit outputs a negative polarity voltage to the full-wave rectifying circuit and the half-wave rectifying circuit, respectively.