Title:
VIDEO DEVICE
Document Type and Number:
WIPO Patent Application WO/2019/064700
Kind Code:
A1
Abstract:
The present invention proposes an optical scanning scheme for a video device that includes a light scanning unit having a beam structure where one end of a light guiding path protrudes. The video device comprises: a light scanning unit having a light guide that receives light from one end and outputs the light from the other end and a vibration unit that applies vibration to the light guide through a bonding part near the other end of the light guide; a drive signal generation unit for generating a drive signal for inducing vibration in the vibration unit; and a scanning trajectory control unit that generates a first drive signal for driving the vibration unit in a first direction substantially perpendicular to the optical axis of the light guide and a second drive signal for driving the vibration unit in a second direction substantially perpendicular to the optical axis of the light guide and substantially perpendicular to the first direction in an arbitrary pattern, with the vibration unit capable of vibrating the light guide independently in the first direction and in the second direction. The scanning trajectory control unit generates the first drive signal and the second drive signal as a sine wave with substantially the same frequency but with different phases. The amount of amplitude modulation in the sine wave of the second drive signal is greater than the amount of amplitude modulation in the sine wave of the first drive signal.
More Like This:
| JPH06148555 | SCANNER MOTOR |
| JPH0372311 | OPTICAL SCANNER |
| JPH0969663 | LIGHT INTENSITY MODULATOR CIRCUIT FOR OPTICAL SCANNER |
Inventors:
MATSUDA TAKAHIRO (JP)
SEO YOSHIHO (JP)
OOUCHI SATOSHI (JP)
ONOE SHINSUKE (JP)
SEO YOSHIHO (JP)
OOUCHI SATOSHI (JP)
ONOE SHINSUKE (JP)
Application Number:
PCT/JP2018/021256
Publication Date:
April 04, 2019
Filing Date:
June 01, 2018
Export Citation:
Assignee:
HITACHI LTD (JP)
International Classes:
G02B26/10
Domestic Patent References:
| WO2016116963A1 | 2016-07-28 |
Foreign References:
| JP2013244045A | 2013-12-09 | |||
| JP2015206981A | 2015-11-19 | |||
| JP2014147462A | 2014-08-21 | |||
| JP2008116922A | 2008-05-22 |
Attorney, Agent or Firm:
SEIRYO I.P.C. (JP)
Download PDF:
Previous Patent: INSTRUMENT SUPPORTING STRUCTURE FOR SADDLED VEHICLES
Next Patent: METHOD FOR COUNTING NUMBER OF MICROORGANISMS
Next Patent: METHOD FOR COUNTING NUMBER OF MICROORGANISMS