Invention Grant
- Patent Title: Optical deflection apparatus, head-up display apparatus, optical writing unit, image forming apparatus, and object recognition apparatus
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Application No.: US16005962Application Date: 2018-06-12
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Publication No.: US10792931B2Publication Date: 2020-10-06
- Inventor: Jun Nakagawa , Toshihiro Yamashiro
- Applicant: Jun Nakagawa , Toshihiro Yamashiro
- Applicant Address: JP Tokyo
- Assignee: Ricoh Company, Ltd.
- Current Assignee: Ricoh Company, Ltd.
- Current Assignee Address: JP Tokyo
- Agency: IPUSA, PLLC
- Priority: com.zzzhc.datahub.patent.etl.us.BibliographicData$PriorityClaim@31737ae8
- Main IPC: B41J2/47
- IPC: B41J2/47 ; G01S7/481 ; G02B26/10 ; G02B27/01 ; H04N5/74 ; G02B26/08 ; H04N1/113

Abstract:
An optical deflection apparatus includes a mirror unit, a pair of elastic supporting units configured to rotatably support the mirror unit around a predetermined axis, at least one drive unit configured to elastically deform the pair of elastic supporting units, and a drive control unit configured to input a drive frequency into the at least one drive unit so as to control the at least one drive unit, wherein a first time interval at which the drive control unit changes the drive frequency in a first temperature range is shorter than a second time interval at which the drive control unit changes the drive frequency in a second temperature range, the second temperature range being at a higher temperature than the first temperature range.
Public/Granted literature
Information query
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