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. 24, 2012
Filed:
Jul. 30, 2009
Koichi Yahata, Hitachinaka, JP;
Masashige Tsuji, Hitachinaka, JP;
Yoshio Akaishi, Hitachinaka, JP;
Hitachi Automotive Systems, Ltd., Hitachinaka-shi, JP;
Abstract
Connection portions (UP throughWP) to which upper arm control terminals (UU throughUW) are connected are disposed at a first edge portion of a drive circuit board (). And connection portions (UN throughWN to which lower arm control terminals (LU throughLW) are connected are disposed at a second edge portion of the drive circuit board (). Upper arm implementation regions (UP throughWP), lower arm implementation regions (UN throughWN), and a low voltage pattern region () in which photo-couplers (U throughW) are implemented are formed in the board region between these board edge portions. And signal wiring (U) that transmits a control signal from a photo-coupler (U) to an implementation region (UN) is formed in a conductor layer that is a lower layer than the conductor layer in the lower arm implementation region in which the lower arm driver circuit is implemented.