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:
May. 10, 2022
Filed:
May. 12, 2020
Akitoshi Mochida, Osaka, JP;
Akitoshi Mochida, Osaka, JP;
Ricoh Company, Ltd., Tokyo, JP;
Abstract
A light deflector includes a reflector having a reflection plane, a pair of movable parts that support the reflector, a supporting unit configured to support the pair of movable parts, a piezoelectric drive circuit provided for the pair of movable parts, the piezoelectric drive circuit being configured to drive the reflector in response to waveform of driving voltage, and circuitry configured to output two different driving voltages to the piezoelectric drive circuit. Each one of the two different driving voltages has waveform, and the waveform of each one of the two different driving voltages includes, in one cycle, a step-up period where voltage increases, a step-down period where voltage decreases, a first constant-voltage period where voltage is constant after the step-up period and before the step-down period, and a second constant-voltage period where voltage is constant before the step-up period and after the step-down period.