Information display device

Abstract

An information display device (1G) attachable to a structure includes a display panel (23) and a surface member (11). The display panel (23) has a display surface and displays information on the display surface. The surface member (11) is disposed on the display surface side of the display panel (23) and is in a state where only the information displayed on the display surface of the display panel (23) is visible through the surface member (11) when the display panel (23) is turned on. The surface member includes a first layer (71) disposed on a front side, and a second layer (72) that is disposed on the display panel (23) side with respect to the first layer (71) and adjusts light transmittance of the surface member (11).

1 . An information display device attachable to a structure, comprising:
 a display panel that has a display surface and displays information on the display surface; and   a surface member that is disposed on a display surface side of the display panel and through which only the information displayed on the display surface of the display panel becomes visible when the display panel is turned on,   wherein the surface member includes a first layer disposed on a front side, and a second layer disposed on a display panel side with respect to the first layer and adjusting light transmittance of the surface member.   
     
     
         2 . The information display device of  claim 1 ,
 wherein the first layer is formed by printing, painting, or a film, and   wherein the second layer is formed by printing, painting, vapor deposition, or a film.   
     
     
         3 . The information display device of  claim 1 ,
 wherein a light transmittance of the second layer is 40% to 60%.   
     
     
         4 . The information display device of  claim 1 ,
 wherein the second layer is formed by a half mirror having a light transmittance of 40% to 70%.   
     
     
         5 . The information display device of  claim 1 ,
 wherein the second layer is an optical filter, and   wherein the optical filter is configured to transmit only light from the display panel and suppress transmission of external light.   
     
     
         6 . The information display device of  claim 1 ,
 wherein the first layer and the second layer are configured to have a total light transmittance of 8% to 15%.   
     
     
         7 . The information display device of  claim 1 ,
 wherein the display panel has a screen luminance of 200 cd/m{circumflex over ( )}2 or less after transmission through the surface member.   
     
     
         8 . The information display device of  claim 1 ,
 wherein the display panel has a luminance of the display surface adjusted to 800 cd/m{circumflex over ( )}2 or more.   
     
     
         9 . The information display device of  claim 1 ,
 wherein the surface member includes a plate-like member,   wherein the first layer is disposed to be in close contact with a part or the entirety of a front side of the plate-like member, and   wherein the second layer is disposed to be in close contact with a part or the entirety of a back side of the plate-like member.   
     
     
         10 . The information display device of  claim 1 ,
 wherein the surface member includes a transparent or translucent film member,   wherein the first layer is disposed to be in close contact with a part or the entirety of a front side of the film member, and   wherein the second layer is disposed to be in close contact with a part or the entirety of a back side of the film member.   
     
     
         11 . The information display device of  claim 10 ,
 wherein the surface member includes a light-transmitting plate disposed on a back side of the second layer.   
     
     
         12 . The information display device of  claim 1 ,
 wherein the second layer is formed by translucent solid printing.   
     
     
         13 . The information display device of  claim 12 ,
 wherein the printing is performed by painting in black with a light transmittance of 40% to 60%.