ELECTRONIC IMAGE PICKUP UNIT

Japanese Patent JP3542312

B2

PROBLEM TO BE SOLVED: To obtain an electronic image pickup unit that automatically adjusts a focus at high speed with high accuracy by detecting a focus error corresponding to a plurality of lens positions from an image signal of one pattern.
SOLUTION: In an electronic still camera where signal charges stored corresponding to an object image formed by an image pickup optical system 1 are read from a CCD 5 and displayed on an LCD 10 via an image pickup circuit 6, an A/D converter, a buffer memory 8 and a D/A converter 9 or recorded in a recording memory 12 via a compression/expansion circuit 11, photoelectric conversion elements of the CCD 5 are divided into a plurality of groups consisting of combinations of a plurality of lines placed at a prescribed interval, the charge storage start timing is controlled so that the elements belonging to the same group start storage of charges in the same timing and the elements belonging to the different groups start storage of charges in the different timings, a focal position is obtained from image signals read from each of the photoelectric conversion elements by an AF processing section 14 and the focus lens group 3 is driven on the basis of the position above.

Hitoshi Hashimoto

JP2000053671A

July 14, 2004

February 29, 2000

Click for automatic bibliography generation  

Olympus Endo Technology America Inc.

G02B7/28; G02B7/36; G03B13/36; H04N5/232; H04N5/235; H04N5/335; H04N5/341; H04N5/345; H04N5/353; H04N5/369; H04N5/3728; H04N5/378; (IPC1-7): H04N5/232; H04N5/335

JP10136244A
JP5316432A
JP5007333A

Takehiko Suzue
Sadao Muramatsu
Atsushi Tsuboi
Tetsuya Kazama
Koji Mizuno

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