Mirror device drive control apparatus and projector

Details Mirror device drive control apparatus and projector Mirror device drive control apparatus and projector

2011-08-16

2011-08-16

Phan, James (Department: 2872)

Optical: systems and elements

Deflection using a moving element

Using a periodically moving element

C359S198100, C359S199300, C359S214100

Reexamination Certificate

active

07999986

ABSTRACT:
A mirror device drive control apparatus adapted to perform drive control of a mirror device having a hysteresis characteristic, includes: a drive section adapted to drive the mirror device with a drive signal; a detection section adapted to detect a displacement of a movable section of the mirror device, and to generate and then output a detection signal corresponding to the detection; and a start-up processing section adapted to perform a start-up process of the mirror device, wherein the start-up processing section detects a frequency of an envelope included in abnormal vibration of the movable section as a beat frequency fb based on the detection signal of the detection section, obtains a predetermined frequency f1based on a frequency f of the drive signal of the mirror device with which the beat frequency is detected and the beat frequency fb, and drives the mirror device again with the drive signal having the frequency f1.

REFERENCES:
patent: 2007/0035799 (2007-02-01), Gomi et al.
patent: 09-97305 (1997-04-01), None

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