Method and apparatus for controlling scanning velocity and...

Details Method and apparatus for controlling scanning velocity and... Method and apparatus for controlling scanning velocity and...

2005-08-16

2005-08-16

Tran, Huan (Department: 2861)

Incremental printing of symbolic information

Light or beam marking apparatus or processes

Scan of light

Reexamination Certificate

active

06930701

ABSTRACT:
A method and an apparatus to control the scanning velocity and the amount of light to form a color image, including checking the rotation velocity of the scanning motor and varying the amount of light scanned according to the checked rotation velocity of the scanning motor. A motor clock signal to drive a scanning motor is generated without using an additional oscillator by dividing the frequency of a main clock signal, and the frequency of the motor clock signal is varied by varying a division ratio according to the formation velocity of the color image to be printed. Thus, power and noise are reduced by reducing the velocity of the scanning motor, and the amount of light irradiated to a photosensitive body is easily and finely varied according to the variation in the velocity. These effects are achieved without adding additional parts or logic circuits. Accordingly, the amount of light is increased when the velocity of the scanning motor is high, and the amount of light is reduced when the velocity of the scanning motor is low, thereby forming high quality color images.

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