Login| Sign Up| Help| Contact|

Patent Searching and Data


Title:
REFLECTION SCREEN
Document Type and Number:
Japanese Patent JP2012252049
Kind Code:
A
Abstract:

To provide an inexpensive short focus type reflection screen having an excellent contrast for absorbing only external rays of light by a pigmented layer, and for efficiently projecting video rays of light.

A reflection screen includes at least: a lens layer having a Fresnel lens shape for converting video rays of light projected from a video light source into almost parallel rays of light facing to an almost normal direction of a screen surface, and for emitting the rays of light; a pigmented layer arranged on the video light emission side of the lens layer; and a low refractive index layer arranged on the video light emission side of the pigmented layer so as to be brought into contact with the interface of the pigmented layer, and made of materials having a refractive index which is lower than that of the pigmented layer.


More Like This:
JP2005284051SEMICONDUCTOR LIGHT EMITTING ELEMENT, LIGHT SOURCE UNIT USING THE SAME, OPTICAL UNIT AND VIDEO DISPLAY DEVICE
JP6354502Light source device and projector
JP2021129258PROJECTION APPARATUS, PROGRAM, AND POWER SUPPLY CONTROL METHOD
Inventors:
KAMIYA MASAYUKI
Application Number:
JP2011122396A
Publication Date:
December 20, 2012
Filing Date:
May 31, 2011
Export Citation:
Click for automatic bibliography generation   Help
Assignee:
DAINIPPON PRINTING CO LTD
International Classes:
G03B21/14; G02B5/08; G03B21/60
Domestic Patent References:
JP2008076522A2008-04-03
JP4083191B22008-04-30
JP2007199529A2007-08-09
JP2004177427A2004-06-24
JP2006330145A2006-12-07
JP2008076522A2008-04-03
JP4083191B22008-04-30
JP2007199529A2007-08-09
JP2004177427A2004-06-24
JP2006330145A2006-12-07
Attorney, Agent or Firm:
Hirohito Katsunuma
Yukitaka Nakamura
Noritaka Yokota
Takeyasu Ito
Mari Asano



 
Previous Patent: BLADE DRIVING DEVICE FOR CAMERA

Next Patent: IMAGE FORMING SYSTEM, AND IMAGE FORMING APPARATUS