Login| Sign Up| Help| Contact|

Patent Searching and Data


Title:
TRANSMISSION-TYPE SCREEN AND HEAD-UP DISPLAY
Document Type and Number:
WIPO Patent Application WO/2017/026327
Kind Code:
A1
Abstract:
This transmission-type screen (20) is used in a head-up display (100) and has a light-receiving surface for receiving display light and a light-emitting surface for emitting diverging beams toward a combiner (40). The transmission-type screen (20) includes: a first optical element (21) that is arranged on the light-receiving surface side, has a first lens array (22) in which a plurality of lenses (25) is arranged with the lens surfaces facing the light-emitting surface, and is for collecting light beams; and a second optical element (23) that is arranged on the light-emitting surface side, has a second lens array (24), and is for diverging the light beams. The first lens array satisfies the following relational expression: NA = (r/2) / [f2 + (r / 2)2]1/2 ≤ 0.13 Where NA represents the numerical aperture of each lens in the plurality of lenses, r represents the diameter of each lens, and f represents the focal length of each lens.

Inventors:
USUKURA NARU
SHIMATANI TAKAFUMI
Application Number:
PCT/JP2016/072657
Publication Date:
February 16, 2017
Filing Date:
August 02, 2016
Export Citation:
Click for automatic bibliography generation   Help
Assignee:
SHARP KK (JP)
International Classes:
G02B27/01; B60K35/00; G02B3/00; G02B3/06
Domestic Patent References:
WO1997017633A11997-05-15
Foreign References:
JP2010197493A2010-09-09
JP2007523369A2007-08-16
JP2009128565A2009-06-11
Attorney, Agent or Firm:
OKUDA Seiji (JP)
Download PDF:



 
Previous Patent: BATTERY PACK

Next Patent: IMAGE FORMING APPARATUS