Title:
Head-up display device
Document Type and Number:
Japanese Patent JP6363576
Kind Code:
B2
Abstract:
Disclosed is a head-up display capable of achieving reduction in size while securing an optical path length from an image display element to an image reflecting surface. In a head-up display, a reflection optical system has at least three or more mirrors including an l-th mirror, an m-th mirror, and an n-th mirror sequentially in this order from the image display element side along a light beam emitted from the image display element D, the n-th mirror has a refractive power and is arranged closest to the image reflecting surface side among all mirrors, the light beam emitted from the image display element D is reflected from the l-th mirror, the m-th mirror, and the n-th mirror in this order, the light beam emitted from the n-th mirror passes between the l-th mirror and the m-th mirror and reaches the image reflecting surface, and predetermined conditional expressions are further satisfied.
Inventors:
Keisuke Harada
Application Number:
JP2015191343A
Publication Date:
July 25, 2018
Filing Date:
September 29, 2015
Export Citation:
Assignee:
FUJIFILM Corporation
International Classes:
B60K35/00; G02B27/01
Domestic Patent References:
| JP2009222882A | ||||
| JP62181436U | ||||
| JP2001097073A | ||||
| JP62076032U | ||||
| JP8040142A | ||||
| JP4247489A |
Foreign References:
| US20060209419 |
Attorney, Agent or Firm:
Patent Service Corporation Taiyo International Patent Office
Previous Patent: A picture alignment device, a method, and a program
Next Patent: WELDING METHOD FOR AUTOMOBILE BODY
Next Patent: WELDING METHOD FOR AUTOMOBILE BODY