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:
Mar. 18, 2003
Filed:
Mar. 14, 2001
Aisin Seiki Kabushiki Kaisha, Kariya, JP;
Abstract
An open/close control device for a movable lid is of a highly precise position detection ability by using only a sensor which issues a pulse train in response to a motor rotation amount. When the open/close control device is in the form of a drive unit which controls opening and closing a sunroof, the drive unit includes a motor which drives the sunroof and a control device having a microcomputer . The microcomputer is fed with two pulse train signals from two Hall-ICs, respectively. The signals are in proportion to the rotation number of the motor but are different in phase. On the basis of the pulse train signals, the microcomputer counts a position counter for indication of current position of the sunroof in view of the motor rotation direction.