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:
Oct. 01, 2019
Filed:
Mar. 15, 2017
Applicant:
Ricoh Company, Ltd., Tokyo, JP;
Inventors:
Assignee:
RICOH COMPANY, LTD., Tokyo, JP;
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G02B 26/08 (2006.01); G02B 26/10 (2006.01); G02B 26/12 (2006.01); G03B 21/00 (2006.01); H04N 3/08 (2006.01); H01L 41/04 (2006.01); H04N 1/047 (2006.01); H01L 41/09 (2006.01); G02B 27/00 (2006.01);
U.S. Cl.
CPC ...
G02B 26/0858 (2013.01); G02B 26/101 (2013.01); G02B 26/105 (2013.01); G03B 21/008 (2013.01); H01L 41/042 (2013.01); H01L 41/0953 (2013.01); H04N 1/047 (2013.01); H04N 3/08 (2013.01); G02B 27/0031 (2013.01);
Abstract
A control unit to control a movement of a reflector includes a drive signal output unit to apply a drive voltage having a minimum value and a maximum value in one cycle to a piezoelectric element to deform the piezoelectric element, the deformation of the piezoelectric element causing the reflector to move, and circuitry to control the drive voltage to have the minimum value greater than a zero voltage by a given difference value.