Ex parte HOFFMAN et al. - Page 7

          Appeal No. 1997-0384                                                        
          Application 08/086,498                                                      

          given length of time in order to scroll an image across a                   
          screen.  Thus, scrolling is concerned with interference                     
          between image frames, whereas refreshing is not.                            
               As specifically recognized by Hilsum, "[r]efreshing is to              
          be distinguished from resetting or rewriting which involves                 
          changing the information or scene displayed" (column 1, lines               
          41 to 43).  We note that the scrolling of appellants’ claims                
          on appeal involves just that, rewriting or changing the                     
          information displayed, so that an image appears to scroll                   
          across the screen.  Accordingly, although Hilsum discusses a                
          decay rate in relation to a display, Hilsum concerns                        
          refreshing (activating a display element for a given time) and              
          not scrolling (unactivating or blanking a display element for               
          a given time).  Indeed, the portion of Hilsum relied on by the              
          examiner actually describes a display element (element 3  of                
          Figure 3) as being "in the operated state for a period                      
          determined by the length of the pulses plus the decay rate of               
          the particular display effect used after removal of the                     
          pulses" (Hilsum, column 4, lines 58 to 61).                                 
               Appellants argue (Brief, page 4) that Hilsum does not                  
          concern scrolling images on a display.  We agree.  As                       

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