US 12,117,625 B2
Reflective display body and roll body of light diffusion control sheet
Baku Katagiri, Tokyo (JP); Tatsuki Kuramoto, Tokyo (JP); Tetsuya Arazoe, Tokyo (JP); and Kentaro Kusama, Tokyo (JP)
Assigned to LINTEC CORPORATION, Tokyo (JP)
Filed by LINTEC CORPORATION, Tokyo (JP)
Filed on Nov. 10, 2021, as Appl. No. 17/523,145.
Claims priority of application No. 2020-188091 (JP), filed on Nov. 11, 2020.
Prior Publication US 2022/0146719 A1, May 12, 2022
Int. Cl. G02B 5/00 (2006.01); G02B 5/02 (2006.01)
CPC G02B 5/0236 (2013.01) 7 Claims
OG exemplary drawing
 
1. A reflective display body configured such that an up-down direction of display content on a display surface can be changed, the reflective display body comprising:
a light diffusion control layer;
a display device provided on one surface side of the light diffusion control layer; and
a reflective layer provided on a surface side of the display device opposite to the light diffusion control layer, wherein
the light diffusion control layer has a diffusion angle width of 5° or more and 80° or less in which a haze value (%) is 90% or more as measured when one surface of the light diffusion control layer is irradiated with light rays at an incident angle of −70° to 70° with respect to a normal direction of the one surface being 0°, and
the light diffusion control layer has an acute angle of 7° or more and 83° or less, the acute angle being defined as an angle formed between the up-down direction of the display content and a straight line obtained by projecting a light ray specified as a centroid of a transmitted and diffused light onto an other surface of the light diffusion control layer, and when the one surface of the light diffusion control layer is irradiated with incident light perpendicular to the one surface, the transmitted and diffused light is generated from the other surface.