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:
Jan. 09, 2018
Filed:
Apr. 15, 2015
Nippon Seiki Co., Ltd., Niigata, JP;
Ryoichi Ishibashi, Niigata, JP;
Satoshi Kobayashi, Niigata, JP;
Norihiko Ushida, Niigata, JP;
Yoshiko Adachi, Niigata, JP;
NIPPON SEIKI CO., LTD., Niigata, JP;
Abstract
A display device includes: a stepping motor; a concave mirror that moves in accordance with the operation of the stepping motor, the concave mirror reflecting display light emitted from a display unit toward the windshield; a lever part that moves together with the concave mirror; a drive unit for driving the stepping motor by a microstep drive system; a control unit for controlling the movement of the concave mirror by controlling the drive unit; and a stopper unit provided within the range of movement of the lever part. The drive unit is configured to detect the counter-electromotive force generated by the stepping motor when the lever part comes into contact with the stopper unit. The control unit determines the reference position when the movement of the concave mirror is controlled in accordance with the counter-electromotive force detected by the drive unit.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile