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:
Jun. 06, 2023
Filed:
May. 15, 2020
Seiko Epson Corporation, Tokyo, JP;
Takao Hirakura, Matsumoto, JP;
Seiko Epson Corportation, Tokyo, JP;
Abstract
A method for controlling an optical device including a movable section including an optical section that refracts incident video image light in accordance with the angle of incidence of the video image light and outputs the refracted video image light and a holding section that supports the optical section, and an actuator that causes the movable section to swing, the method including applying a drive signal to the actuator to cause the movable section to swing. The drive signal is a trapezoidal wave having a trapezoidal waveform. Each leg section of the trapezoidal wave is formed of a first leg section and a second leg section connected to the first leg section. The inclination of the second leg section respect to the flat section of the trapezoidal wave is smaller than the inclination of the first leg section with respect to the flat section of the trapezoidal wave.