Ex parte URBANUS et al. - Page 2





              Appeal No. 1999-0301                                                                                           
              Application No. 08/156,541                                                                                     


                      15.     A digital display system comprising:                                                           
                             a digital display device for receiving a series of binary image data                            
                      words and displaying an image representative of said data words, each said                             
                      image data word comprised of at least two bits, each said bit in said image                            
                      data words displayed sequentially for a display duration representative of the                         
                      weight of said bit;                                                                                    
                             at least one input image modification signal representing a desired                             
                      image contrast; and                                                                                    
                             a display system controller, said system controller oppositely altering                         
                      the display duration of at least two said bits based on said image                                     
                      modification signal.                                                                                   
                      The references relied upon by the examiner are:                                                        
                      Popowski et al. (Popowski)           4,709,230         Nov. 24, 1987                                   
                      Kohgami et al. (Kohgami)             5,187,578         Feb. 16, 1993                                   
                      Yomiya                                     JP 2-212881         Aug. 24, 1990                           
                      Claims 21, 22, 24 and 25 stand rejected under 35 U.S.C. § 112, second                                  
              paragraph, as being indefinite for failing to particularly point out and distinctly claim the                  
              subject matter which the applicants regard as the invention.                                                   
                      Claims 15 and 23 stand rejected under 35 U.S.C. § 103(a) as being unpatentable                         
              over Kohgami.                                                                                                  
                      Claim 19 stands rejected under 35 U.S.C. § 103(a) as being unpatentable over                           
              Kohgami in view of Popowski.                                                                                   








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