Autofocus video camera that can compensate for variation in the

Details Autofocus video camera that can compensate for variation in the Autofocus video camera that can compensate for variation in the

1995-11-20

1998-11-17

Garber, Wendy

Television

Camera, system and detail

Optics

348354, 348357, 396 83, 396 93, 396118, H04N 5232

Patent

active

058383743

ABSTRACT:
A calculation circuit compares a current focus evaluation value provided from a focus evaluation value generation circuit, with a focus evaluation value, of one preceding field stored in a memory, to determine whether a CCD is in-focus or not. The calculation circuit provides a driving signal VD to a linear motor so that the CCD moves toward the in-focus position. A position prediction circuit predicts the position where the CCD arrives after a predetermined time period according to the driving signal VD. A comparator circuit compares a predicted result from the position prediction circuit with the actual moved position of the CCD detected by a position detection circuit to provide a signal Dpr corresponding to an amount of load according to the comparison result. A correction value determination circuit and a bias determination circuit correct the level of driving signal VD in response to signal Dpr to supply a second corrected driving signal VD2 to a voice coil.

REFERENCES:
patent: 4570185 (1986-02-01), Arai et al.
patent: 5005040 (1991-04-01), Norita et al.
patent: 5057859 (1991-10-01), Ishimaru
patent: 5325145 (1994-06-01), Hirasawa
patent: 5387936 (1995-02-01), Katsumoto
patent: 5404013 (1995-04-01), Tajima
patent: 5479236 (1995-12-01), Tanaka

Affiliated with

Also associated with

Rating

Autofocus video camera that can compensate for variation in the does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Autofocus video camera that can compensate for variation in the , we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Autofocus video camera that can compensate for variation in the will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-889390