Plasma display panel filters

Abstract

The present invention is in the field of plasma display panel filters, and more specifically the present invention is in the field of multiple layer plasma display panel filters comprising a PVB layer. Also included are methods of filtering plasma display panel radiation and plasma display panel devices utilizing plasma display panel filters of the present invention.

We claim:  
     
         1 . A layered plasma display panel filter, comprising: 
 a first layer comprising polyvinyl butyral or ethylene vinyl acetate;    a second layer disposed in contact with said first layer, wherein said second layer comprises a polymeric material; and,    a third layer disposed in contact with said first layer, wherein said third layer comprises glass.    
     
     
         2 . The filter of  claim 1 , wherein said first layer comprises polyvinyl butyral.  
     
     
         3 . The filter of  claim 1 , wherein said second layer comprises polyethylene terephthalate.  
     
     
         4 . The filter of  claim 1 , wherein said third layer comprises silicon dioxide.  
     
     
         5 . The filter of  claim 1 , wherein said first layer comprises an NIR absorbing agent.  
     
     
         6 . The filter of  claim 1 , wherein said first layer comprises an agent that selectively absorbs light having a wavelength of 590 nanometers.  
     
     
         7 . The filter of  claim 1 , wherein said second layer comprises an electromagnetic shield.  
     
     
         8 . The filter of  claim 7 , wherein said electromagnetic shield is a copper grid.  
     
     
         9 . The filter of  claim 1 , wherein said filter has a thickness of less than 4.0 millimeters.  
     
     
         10 . The filter of  claim 9 , wherein said filter has a thickness of less than 3.5 millimeters.  
     
     
         11 . The filter of  claim 1 , wherein said filter further comprises an additional layer comprising polyvinyl butyral or ethylene vinyl acetate.  
     
     
         12 . The filter of  claim 11 , wherein said first layer and said additional layer have the following cumulative optical properties when laminated with three clear glass layers each having a thickness of 2.0 mm: 
 global visible transmission expressed as illuminant C of 30% to 70%;    transmission at 590 nm of 0% to 65%;    transmission at 800 nm of less than 25%;    transmission at 850 nm less than 15% transmission between 900 nm and 1100 nm less than 10%; and,    color expressed by the L*a*b*-system for a* and b* of between −5 and +5.    
     
     
         13 . The filter of  claim 1 , wherein said filter further comprises an additional layer comprising glass.  
     
     
         14 . The filter of  claim 1 , wherein said first layer has the following optical properties when laminated between two clear glass layers each having a thickness of 2.0 mm: 
 global visible transmission expressed as illuminant C of 30% to 70%;    transmission at 590 nm of 0% to 65%;    transmission at 800 nm of less than 25%;    transmission at 850 nm less than 15% transmission between 900 nm and 1100 nm less than 10%; and,    color expressed by the L*a*b*-system for a* and b* of between −5 and +5.    
     
     
         15 . A layered plasma display panel filter, comprising a first layer and a second layer disposed in contact with one another, wherein said first layer comprises polyvinyl butyral or ethylene vinyl acetate.  
     
     
         16 . The filter of  claim 15 , wherein said second layer comprises polyethylene terephthalate.  
     
     
         17 . The filter of  claim 15 , wherein said second layer is a glass layer.  
     
     
         18 . The filter of  claim 15 , further comprising a third layer disposed in contact with said first layer.  
     
     
         19 . The filter of  claim 15 , wherein said first layer comprises an NIR absorbing agent.  
     
     
         20 . The filter of  claim 15 , wherein said first layer comprises an agent that selectively absorbs light having a wavelength of 590 nanometers.  
     
     
         21 . The filter of  claim 15 , wherein said second layer comprises an electromagnetic shield.  
     
     
         22 . The filter of  claim 21 , wherein said electromagnetic shield is a copper grid.  
     
     
         23 . The filter of  claim 15 , wherein said first layer has the following optical properties when laminated between two clear glass layers having a thickness of 2.0 mm each: 
 global visible transmission expressed as illuminant C of 30% to 70%;    transmission at 590 nm of 0% to 65%;    transmission at 800 nm of less than 25%;    transmission at 850 nm less than 15% transmission between 900 nm and 1100 nm less than 10%; and,    color expressed by the L*a*b*-system for a* and b* of between −5 and +5.    
     
     
         24 . The filter of  claim 15 , further comprising a third layer disposed in contact with either said first layer or said second layer, wherein said third layer comprises polyvinyl butyral or ethylene vinyl acetate and wherein said first layer and said third layer have the following cumulative optical properties when laminated with three clear glass layers each having a thickness of 2.0 mm: 
 global visible transmission expressed as illuminant C of 30% to 70%;    transmission at 590 nm of 0% to 65%;    transmission at 800 nm of less than 25%;    transmission at 850 nm less than 15%    transmission between 900 nm and 1100 nm less than 10%; and,    color expressed by the L*a*b*-system for a* and b* of between −5 and +5.    
     
     
         25 . A layered plasma display panel filter, comprising: 
 a first layer comprising polyvinyl butyral or ethylene vinyl acetate;    a second layer disposed in contact with said first layer, wherein said second layer comprises a polymeric material;    a third layer disposed in contact with said first layer, wherein said third layer comprises glass; and,    a fourth layer disposed in contact with either said second layer or said third layer, wherein, said fourth layer comprises polyvinyl butyral or ethylene vinyl acetate.    
     
     
         26 . A method of filtering the electromagnetic radiation produced by a plasma display panel, comprising passing said radiation through a plasma display panel filter comprising a first layer and a second layer disposed in contact with one another, wherein said first layer comprises polyvinyl butyral or ethylene vinyl acetate.