Shake correction control device, shake correction apparatus, and image capture apparatus

Patent metadata

Field	Value
Publication number	US-10484607-B2
Application number	US-201815893062-A
Country	US
Kind code	B2
Filing date	Feb 9, 2018
Priority date	Feb 20, 2017
Publication date	Nov 19, 2019
Grant date	Nov 19, 2019

Abstract

A shake correction control device includes circuitry to control an ON/OFF timing of horizontal synchronizing signals of an image capture element, and an ON/OFF timing of one or more drive signals used for correcting a shake of the image capture element, shift at least one of the ON/OFF timing of the drive signals used for correcting the shake of the image capture element so as to be out of a period of time during which analog/digital (A/D) conversion processing is collectively performed on pixel signals for one or more horizontal lines of the image capture element, and adjust the at least one of the ON/OFF timing of the drive signals used for correcting the shake of the image capture element with respect to the horizontal synchronizing signals based on the number of the one or more horizontal lines of the pixel signals collectively subjected to the A/D conversion processing.

First claim

What is claimed is:

1. A shake correction control device comprising:
circuitry to
control an ON timing and OFF timing of one or more horizontal synchronizing signals of an image capture element, and an ON timing and OFF timing of one or more drive signals used for correcting a shake of the image capture element;
shift at least one of the ON timing and OFF timing of the one or more drive signals used for correcting the shake of the image capture element to be out of a period of time during which analog/digital (A/D) conversion processing is collectively performed on pixel signals for a plurality of horizontal lines of the image capture element; and
adjust the at least one of the ON timing and OFF timing of the one or more drive signals used for correcting the shake of the image capture element with respect to the one or more horizontal synchronizing signals based on a number of horizontal lines of the plurality of horizontal lines of the pixel signals collectively subjected to the A/D conversion processing,
wherein at least one of the ON timing and OFF timing of the one or more drive signals is located within a reset conversion time period after shifting.

2. The shake correction control device of claim 1 , wherein the circuitry outputs the one or more drive signals by setting a cycle corresponding to a number obtained by multiplying the number of the plurality of horizontal lines of the pixel signals, collectively subjected to the A/D conversion processing, with a cycle of the horizontal synchronizing signals.

3. The shake correction control device of claim 1 , wherein the circuitry counts a number of the one or more horizontal synchronizing signals, and synchronizes any one of the ON timing and the OFF timing of the one or more drive signals used for correcting the shake of the image capture element with the one or more horizontal synchronizing signals based on the counted number of the one or more horizontal synchronizing signals.

4. The shake correction control device of claim 1 , wherein the circuitry changes the number of the plurality of horizontal lines collectively subjected to the A/D conversion processing depending on a drive mode of the image capture element.

5. The shake correction control device of claim 4 , wherein the drive mode includes a mode for capturing a movie image and another mode for capturing a still image.

6. A shake correction apparatus comprising:
the shake correction control device of claim 1 ; and
a sensor to detect a motion of the image capture element.

7. The shake correction apparatus of claim 6 , further comprising a mechanism to adjust a position of the image capture element based on the one or more drive signals.

8. An image capture apparatus comprising:
the shake correction apparatus of claim 6 ; and
circuitry to
set a drive mode of the image capture element,
convert one or more analog image signals output from the image capture element to one or more digital image signals by performing the analog/digital (A/D) conversion processing, and
output the one or more digital image signals to any one of a monitor and a storage medium.

9. The shake correction control device of claim 1 , wherein the one or more drive signals are active-low signals.

Assignees

• Nishimura Takeyoshi
• Asakura Naoto
• Ricoh Co Ltd

Inventors

• Nishimura Takeyoshi
• Asakura Naoto

Classifications

• G02B27/646 Primary

  compensating for small deviations, e.g. due to vibration or shake (movement of one or more optical elements for control of motion blur in cameras, projectors or printers G03B2205/0007; image stabilisation in cameras peculiar to the presence or use of an electronic image sensor H04N23/68) · CPC title

• H04N23/684 Primary

  performed by controlling the image sensor readout, e.g. by controlling the integration time · CPC title

• H04N25/76

  Addressed sensors, e.g. MOS or CMOS sensors · CPC title

• H04N23/667

  Camera operation mode switching, e.g. between still and video, sport and normal or high- and low-resolution modes · CPC title

• H04N23/68

  for stable pick-up of the scene, e.g. compensating for camera body vibrations · CPC title