Photoluminescent coaster

Abstract

A coaster device includes a substrate including a brightening agent on its upper surface and a photoluminescent layer on, or impregnated into, the upper surface. The photoluminescent layer on said upper surface absorbs radiant energy and emits radiant energy in the form of light. The substrate is optionally formed from a moisture absorbent material, a moisture resistant material, or a combination thereof. Optionally, a case may be provided to receive and at least partially encase the substrate.

1 . A coaster device, comprising:
 a substrate having an upper surface and a lower surface, said substrate having a brightening agent on at least said upper surface of said substrate; and   a photoluminescent layer on said upper surface absorbing radiant energy and emitting radiant energy in the form of light.   
   
   
       2 . The coaster device of  claim 1  wherein said photoluminescent layer is selectively applied to form a display illuminated by said photoluminescent layer. 
   
   
       3 . The coaster device of  claim 1  wherein said photoluminescent layer forms a moisture resistant coating over said substrate. 
   
   
       4 . The coaster device of  claim 1  wherein said substrate is formed from a moisture absorbent material. 
   
   
       5 . The coaster device of  claim 1  wherein said substrate is formed from a moisture resistant material. 
   
   
       6 . The coaster device of  claim 1  wherein said brightening agent is integrated into said substrate. 
   
   
       7 . The coaster device of  claim 1  wherein said brightening agent is applied to said upper surface. 
   
   
       8 . The coaster device of  claim 1  wherein said photoluminescent layer is impregnated into said upper surface. 
   
   
       9 . The coaster device of  claim 1  wherein said photoluminescent layer is applied to said upper surface. 
   
   
       10 . The coaster device of  claim 1  further comprising a case receiving said substrate such that said substrate is at least partially encased in said case. 
   
   
       11 . The coaster device of  claim 10  wherein said case is transparent and includes a formed image such that said photoluminescent layer illuminates said image when said substrate is encased in said case. 
   
   
       12 . The coaster device of  claim 10  wherein said case is translucent and includes a formed image such that said photoluminescent layer illuminates said image when said substrate is encased in said case. 
   
   
       13 . A coaster device, comprising:
 a substrate having an upper surface and a lower surface, said substrate formed from a moisture absorbent material having a brightening agent on at least said upper surface of said substrate; and   a photoluminescent layer on said upper surface absorbing radiant energy and emitting radiant energy in the form of light when the level of radiant energy available for absorption falls below a predetermined level.   
   
   
       14 . The coaster device of  claim 13  wherein said photoluminescent layer is selectively applied to form a display illuminated by said photoluminescent layer. 
   
   
       15 . The coaster device of  claim 13  wherein said photoluminescent layer forms a moisture resistant coating over said substrate. 
   
   
       16 . The coaster device of  claim 13  further comprising a moisture resistant layer applied to said lower surface. 
   
   
       17 . The coaster device of  claim 13  wherein said brightening agent is integrated into said substrate. 
   
   
       18 . The coaster device of  claim 13  wherein said brightening agent is applied to said upper surface. 
   
   
       19 . The coaster device of  claim 13  wherein said photoluminescent layer is impregnated into said upper surface. 
   
   
       20 . The coaster device of  claim 13  wherein said photoluminescent layer is applied to said upper surface.