Title:
VIDEO PROJECTION DEVICE AND HEAD-UP DISPLAY DEVICE HAVING THE SAME
Document Type and Number:
Japanese Patent JP2018004757
Kind Code:
A
Abstract:
PROBLEM TO BE SOLVED: To provide a video projection device which can obtain an excellent film formation with a common projection optical system regardless of a projection distance, and a head-up display device having the video projection device.SOLUTION: The present invention includes: an LD 11 for emitting an optical beam; a collimator 12 for forming the emitted optical beam to be parallel light; adjusting units 14, 14A, and 17 for adjusting convergence and divergence of the light beam so that the film formation point of the formed light beam is located on a screen 30; scanning units 14, 14A, and 14B for deflection-scanning the light beam whose convergence and divergence have been adjusted; and a projection optical system 21 on a path from the scanning units 14, 14A, and 14B to the screen 30, the system 21 having at least one optical element and projecting the deflection-scanned light beam onto the screen 30. The projection optical system 21 is located at such a position that a front-side main surface is separate from the scanning units 14, 14A, and 14B by a focal distance of the projection optical system 21.SELECTED DRAWING: Figure 2
Inventors:
ISHIHARA KAZUYUKI
ANDO HIROSHI
ANDO HIROSHI
Application Number:
JP2016127756A
Publication Date:
January 11, 2018
Filing Date:
June 28, 2016
Export Citation:
Assignee:
DENSO CORP
International Classes:
G02B26/10; G02B26/08; G02B27/01
Domestic Patent References:
| JP2014139657A | 2014-07-31 | |||
| JP2016045321A | 2016-04-04 | |||
| JP2016033528A | 2016-03-10 | |||
| JP2001290095A | 2001-10-19 | |||
| JP2017097171A | 2017-06-01 | |||
| JP2003295108A | 2003-10-15 | |||
| JP2009193008A | 2009-08-27 |
Foreign References:
| EP3035110A1 | 2016-06-22 | |||
| US20150253469A1 | 2015-09-10 | |||
| WO2008053862A1 | 2008-05-08 | |||
| EP2945005A1 | 2015-11-18 |
Attorney, Agent or Firm:
Nagoya International Patent Service Corporation