Method and apparatus for controlling a pixel clock in a rotating

Details Method and apparatus for controlling a pixel clock in a rotating Method and apparatus for controlling a pixel clock in a rotating

1998-12-15

2000-12-05

Le, N.

Incremental printing of symbolic information

Light or beam marking apparatus or processes

Scan of light

347235, 455313, 455260, B41J 2435

Patent

active

061574007

ABSTRACT:
An imaging system having a raster output scanner that produces high quality scan lines comprised of evenly spaced pixels. The raster output laser device is modulated in accordance with a variable frequency pixel clock that is derived from a high frequency oscillator using a dual modulus programmable divider that is controlled by a state machine. In turn, that state machine is controlled by information stored in a memory. The variable frequency pixel clock compensates for scan line nonlinearity, polygon facet errors, and/or scan line magnification.

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patent: 5477330 (1995-12-01), Dorr
patent: 5517230 (1996-05-01), Lofthus et al.
patent: 5651017 (1997-07-01), Genovese
patent: 5867068 (1999-02-01), Keating
patent: 5910651 (1999-06-01), Ryvkin
The Technique of Direct Programming by Using a Two-Modulus Prescaler, Motorola Semiconducor Technical Data, AN827/D, Motoral, Inc. 1995.

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