Variable dot density printing system using sub-microdot matrixin

Details Variable dot density printing system using sub-microdot matrixin Variable dot density printing system using sub-microdot matrixin

1992-06-03

1998-05-19

Yockey, David F.

Incremental printing of symbolic information

Light or beam marking apparatus or processes

Scan of light

347237, 358298, B41J 247, H04N 123

Patent

active

057542180

ABSTRACT:
The present invention is directed to a laser printer including a printer controller, a printhead including a plurality of lasers formed in an array for receiving modulating image data from the printer controller, a variable magnifying means such as a zoom lens, and a drum on which a receiver member is mounted on which an image is to be printed. The printer controller is arranged to selectively use any one of a set of predetermined microdot matrixing values and a separate sub-microdot matrix associated therewith, and distribute image data to the plurality of lasers based on such microdot and sub-microdot matrixing values. The variable magnification means (e.g., a zoom lens) applies optical magnification or demagnification to light beams from the array of lasers to provide selective variable microdot matrixing values between the predetermined microdot matrixing values of the set. Therefore, any dot density between a low and a high microdot matrix value of the set of predetermined microdot matrixing values is produced using combinations of microdot and sub-microdot matrixing by the printer controller and variable magnification of the zoom lens.

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