Low vibration resonant scanning unit for miniature optical displ

Details Low vibration resonant scanning unit for miniature optical displ Low vibration resonant scanning unit for miniature optical displ

1988-05-31

1990-02-20

Arnold, Bruce Y.

350486, 350 691, G02B 2610

Patent

active

049020838

ABSTRACT:
A resonant scanning unit utilizes a "tuning fork" design with a mirror mounted on one arm of the tuning fork and a counterbalance mass mounted on the other arm. A voice coil electromagnetic motor mounted between the arms causes the arms to move in opposite directions. Light generated by a line of LEDs is reflected from the oscillating mirror to generate a raster display. Reaction forces generated by the motions of the mirror and counterbalance mass cancel each other at the device base, reducing vibration. In addition, the inventive structure allows placement of the mirror pivot point away from the center of the mirror which allows display devices constructed with the structure to be reduced in size.

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Invention Disclosure, Fritzel et al., "Reactionless Mirror Drive", Hughes Aircraft Company, May 1975.
OKI Technical Review 123, vol. 52, publication "High-Resolution Display Using Light-Emitting Diode Arrays", Abiko et al., 1/86, pp. 46-50.

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