Color filter assembly driver for scanners

Details Color filter assembly driver for scanners Color filter assembly driver for scanners

1992-05-22

1993-06-15

Ben, Loha

Optical: systems and elements

Absorption filter

359889, 356418, G02B 522

Patent

active

052204642

ABSTRACT:
A color filter assembly driver using a microprocessor to control a motor drive in driving a color filter assembly through a step motor and to compare feedback signal of the color filter assembly with a synchronizing signal permitting compared result to be calculated, so as to change the exciting cycle and time of the step motor according to calculation result. The microprocessor also controls the motor drive to change the single phase or two-phase exciting mode of the step motor so that the step motor is controlled to rotate at high or low revolving speed.

REFERENCES:
patent: 3492478 (1970-01-01), Smith
patent: 4082464 (1978-04-01), Johnson, Jr.
patent: 4176916 (1979-12-01), Carpenter

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