Large format emissive display

Abstract

A backframe may be utilized to align a plurality of emissive display tiles precisely with respect to one another. The individual display tiles may be removable from the backframe for replacement or other reasons. As a result, the spacing between individual tiles in an overall large format display may be precisely controlled in some cases. In addition, regularly occurring gaps between adjacent tiles may be filled with a suitable light absorbing material to reduce the visibility of seams.

What is claimed is:  
     
         1 . A large format display comprising: 
 a plurality of emissive display modules, each module including at least two alignment elements; and    a backframe including a plurality of alignment devices to mate with the alignment elements of said display modules.    
     
     
         2 . The display of  claim 1  wherein each module includes an electroluminescent display tile secured to a backplate, said backplate including said alignment elements.  
     
     
         3 . The display of  claim 2 , said display tile including front and back surfaces and including a driver chip on the back surface of said display tile and one more emissive elements on the front surface thereof.  
     
     
         4 . The display of  claim 3 , said modules including fasteners extending from said backplates.  
     
     
         5 . The display of  claim 4  including elements on said backframe that engage said fasteners to secure said backframe to said modules.  
     
     
         6 . The display of  claim 4  wherein said backframe removeably connects said modules to said backframe.  
     
     
         7 . The display of  claim 6  wherein said fasteners are threaded fasteners.  
     
     
         8 . The display of  claim 1  wherein each module includes a transparent layer and a plurality of spaced apart light emissive cells formed on said layer and defining regions between said cells.  
     
     
         9 . The display of  claim 8  including an optically absorbing material formed on said layer so as to overlay the region between the cells.  
     
     
         10 . The display of  claim 1  including a plurality of gaps between adjacent modules, said gaps being covered by an optically absorbing material.  
     
     
         11 . The display of  claim 10  including an optically clear adhesive between adjacent modules.  
     
     
         12 . A method comprising: 
 engaging a plurality of emissive display modules with a backframe; and    aligning said modules with respect one another using a characteristic of said backframe.    
     
     
         13 . The method of  claim 12  wherein aligning includes causing pins on one of said modules or said backframe to engage holes in one of said modules or said backframe.  
     
     
         14 . The method of  claim 12  including forming said modules by securing light emitting tiles to a backplate having alignment elements, and causing said alignment elements to engage alignment devices on said backframe.  
     
     
         15 . The method of  claim 14  including providing tiles with a plurality of light emitting cells, and coating a region visually between the cells with optically absorbent material.  
     
     
         16 . The method of  claim 14  including filling the seams between adjacent modules with an optical adhesive.  
     
     
         17 . The method of  claim 14  including threadedly securing said modules to said backframe.  
     
     
         18 . The method of  claim 17  including filling the seams between adjacent modules with an optical adhesive material and covering the adhesive material with an optically absorbing material.  
     
     
         19 . A system to connect tiles together to form a large format display, said system comprising: 
 a backplate to mount a tile, said backplate including at least two alignment pins; and    a backframe including a plurality of alignment holes to receive the pins of said backplate.    
     
     
         20 . The system of  claim 19  wherein said backplate includes fasteners extending outwardly from a surface thereof.  
     
     
         21 . The system of  claim 20  wherein a threaded fastener is utilized to secure said backplate to said backframe.  
     
     
         22 . A method comprising: 
 forming a display device having a plurality of spaced, light emitting cells; and    coating the device with a matrix of light absorbing material.    
     
     
         23 . The method of  claim 22  including forming said spaced light emitting cells on one side of a transparent layer.  
     
     
         24 . The method of  claim 23  including coating a second side of said transparent layer with said absorbing material.  
     
     
         25 . The method of  claim 24  including coating said transparent layer at locations overlying the regions between spaced, light emitting cells with first stripes of black material of a first width, coating the regions between the edge displays of the devices and the light emitting cells with a black second stripe of a smaller width, and joining display devices together so that said second stripes have a combined width approximately equal to the width of said first stripes.  
     
     
         26 . A method of forming a large format display comprising: 
 securing a plurality of light emissive display tiles to one another;    defining gaps between adjacent display tiles; and    filing said gaps with a light absorbing material.    
     
     
         27 . The method of  claim 26  including adhesively coupling said display tiles to one another by injecting adhesive into said gaps and covering said adhesive with a light absorbing material.  
     
     
         28 . The method of  claim 27  including using display tiles having a plurality of light emitting cells and coating the regions between said cells with a light absorbing material.  
     
     
         29 . The method of  claim 26  including securing said tiles to a support and defining structure on said tiles and said support to align said tiles.  
     
     
         30 . The method of  claim 29  including removeably mounting said tiles on said support.