Arithmetic technique for variable resolution printing in a ROS

Details Arithmetic technique for variable resolution printing in a ROS Arithmetic technique for variable resolution printing in a ROS

1990-06-28

1993-07-20

Weldon, Ulysses

Communications: electrical

Land vehicle alarms or indicators

Internal alarm or indicator responsive to a condition of the...

340767, 358140, G09G 114

Patent

active

052297608

ABSTRACT:
In a raster output scanner, a method of switching video from one raster to the next during a scan without the creation of a visible artifact. A position encoder is used to determine the position of each raster on the photoreceptor, a first distance above the transition point and a second distance below the transition point, in the process direction. Above the first point the video will be supplied by the first raster, and below the second point the video will be supplied by the second raster. From the first point to the transition point the duty cycle will vary from 100% of data from the first raster to 50% from each raster. From the transition point to the second point the duty cycle will vary from 50% to 100% supplied by the second raster. In this way, there is a gradual, and invisible, transition from one raster to the next.

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