Patent ID: 6157400
Filing Date: 2000-12-05
Classification: B41J,H04N

Abstract:
A laser scanner including a rotating multifaceted polygon for scanning a laser beam across an imaging member to form a plurality of scan lines, with the laser beam being modulated in response to video data, the laser scanner having a combination of:a start of scan detector for producing start of scan (SOS) signals;an oscillator producing a main frequency;a dual modulus programmable divider for dividing said main frequency by a variable division ratio to produce a pixel clock frequency, wherein said variable division ratio depends upon a modulus M1 and upon a modulus M2;a state machine for applying said modulus M1 and said modulus M2 to said dual modulus programmable divider according to an input scan line frequency pattern;a memory for storing a plurality of scan line frequency patterns, said memory further for inputting a selected scan line frequency pattern to said state machine following a start of scan signal; anda synchronizer for synchronizing said video data with said pixel clock frequency;wherein said modulated laser beam produces a plurality of substantially evenly spaced pixels in a scan line.