JP2011164226A5

JP2011164226A5 - Imaging apparatus, drive control apparatus, control method, and program

Info

Publication number: JP2011164226A5
Application number: JP2010024826A
Authority: JP
Filing date: 2010-02-05
Publication date: 2013-03-14
Anticipated expiration: 2030-02-05

Description

前述の目的を達成するために、本発明の撮像装置は、以下の構成を備える。
駆動における機械的なヒステリシスを有する絞りと、該絞りを駆動する駆動手段と、駆動手段の駆動を制御する制御手段と、を備える撮像レンズを用いる撮像装置であって、制御手段は、絞りの停止位置までの駆動量が、機械的なヒステリシスに基づいて決定された予め定められた駆動量より小さく、かつ前回に駆動した方向が停止位置に向かう方向と異なる場合に、絞りを停止位置に向かう方向とは逆の方向に駆動させた後に停止位置まで駆動させ、絞りの停止位置までの駆動量が予め定められた駆動量より大きく、かつ前回に駆動した方向が停止位置に向かう方向と同一である場合に、絞りを停止位置に向かう方向に駆動するように駆動手段を制御することを特徴とする。 In order to achieve the above object, an imaging apparatus of the present invention has the following configuration.
An imaging apparatus using an imaging lens comprising a diaphragm having mechanical hysteresis in driving, a driving means for driving the diaphragm, and a control means for controlling driving of the driving means , wherein the control means stops the diaphragm drive amount up position, when the mechanical hysteresis rather smaller than a predetermined driving amount determined based, and the direction of driving the last differs from person direction toward the stop position, the stop position of the stop the heading direction is driven to the stop position after being driven in the reverse direction, the driving amount to the aperture stop position rather larger than a driving amount of predetermined, and the direction of driving the last towards the stop position If it is the same as the direction, and wherein the benzalkonium controls the driving means to drive the power sale way direction suited to stop at the stop position.

以下、本発明の好適な一実施形態について、図面を参照して詳細に説明する。なお、以下に説明する一実施形態は、撮像装置の一例としての、機械的なヒステリシスを有する絞りを駆動して光量を調整可能なデジタルカメラに、本発明を適用した例を説明する。しかし、本発明は、機械的なヒステリシスを有する絞りを駆動制御することが可能な任意の機器に適用可能である。また、本明細書において、「ヒステリシス量」とは絞りの駆動において、機械的なヒステリシスの影響を受けると判断する、予め定められた駆動量である。即ち、絞りの駆動方向が逆転した際に、絞りを駆動するモータ等が駆動しても、絞りの開口量が変化しない駆動量（遊び）を指す。 Hereinafter, a preferred embodiment of the present invention will be described in detail with reference to the drawings. In the following embodiment, an example in which the present invention is applied to a digital camera capable of adjusting a light amount by driving a diaphragm having mechanical hysteresis as an example of an imaging apparatus will be described. However, the present invention is applicable to any device capable Gosuru Dosei driving a diaphragm with a mechanical hysteresis. Further, in this specification, the “hysteresis amount” is a predetermined drive amount that is determined to be affected by mechanical hysteresis in driving the diaphragm. That is, when the driving direction of the diaphragm is reversed, even if a motor or the like that drives the diaphragm is driven, it indicates a driving amount (play) that does not change the aperture amount of the diaphragm.

Claims

A diaphragm having a mechanical hysteresis in the drive, and drive means for driving the restrictor, a that imaging device and a control means for controlling driving of the driving means,
The control means includes
Rather smaller than the drive amount of the drive amount predetermined determined based on the previous SL mechanical hysteresis to the stop position of the diaphragm, and when the direction of driving the last differs from person direction towards the stop position to drive before Symbol stop position after driving in the opposite direction to the direction toward said aperture in said stop position,
If rather larger than the driving amount of the driving amount is the predetermined to the stop position of the diaphragm, and the direction of driving the last is the same as the direction toward the stop position, suited to the aperture in said stop position imaging device according to claim <br/> controlling said drive means to drive the cormorants way direction.

In the direction toward the stop position when the drive amount to the stop position of the diaphragm is smaller than the predetermined drive amount and the last driven direction is different from the direction toward the stop position, the control means 2. The imaging according to claim 1, wherein the driving unit is controlled to drive the diaphragm in the opposite direction so that a driving amount to the stop position becomes the predetermined driving amount. apparatus.

Wherein if a direction toward the stop position is the same as the direction of driving in the previous and controls said driving means so that by driving the diaphragm in the Hare way direction suited to the stop position The imaging apparatus according to claim 1 or 2 .

2. The apparatus according to claim 1, further comprising a determining unit that determines the stop position so that the diaphragm has a target diaphragm value for driving the diaphragm in the opening direction or in the closing direction. 4. The imaging device according to any one of items 1 to 3.

The imaging apparatus according to claim 4, further comprising means for determining the target aperture value at which a captured subject image is in an appropriate exposure state.

A drive control device comprising: drive means for driving a diaphragm having mechanical hysteresis in drive; and control means for controlling drive of the drive means,
  The control means includes
    When the drive amount to the stop position of the stop is smaller than a predetermined drive amount determined on the basis of the mechanical hysteresis, and the previous drive direction is different from the direction toward the stop position, the stop Is driven in the direction opposite to the direction toward the stop position and then driven to the stop position,
    When the drive amount to the stop position of the diaphragm is larger than the predetermined drive amount and the last drive direction is the same as the direction toward the stop position, the diaphragm is moved in the direction toward the stop position. Control the drive means to drive
The drive control apparatus characterized by the above-mentioned.

In the direction toward the stop position when the drive amount to the stop position of the diaphragm is smaller than the predetermined drive amount and the last driven direction is different from the direction toward the stop position, the control means The drive according to claim 6, wherein the drive unit is controlled to drive the diaphragm in the reverse direction so that the drive amount to the stop position becomes the predetermined drive amount. Control device.

The control means controls the driving means to drive the diaphragm in a direction toward the stop position when the direction toward the stop position is the same as the previous drive direction. Or the drive control apparatus of 7.

It further comprises an acquisition means for acquiring information on the stop position determined so that the aperture becomes a target aperture value in either case of driving the aperture in the opening direction or driving in the closing direction. The drive control device according to any one of claims 6 to 8.

The drive control apparatus according to claim 9, wherein the target aperture value is a value determined so that a captured subject image is in an appropriate exposure state.

A diaphragm having a mechanical hysteresis in the drive, a control method of including that imaging device driving means for driving the restrictor, and
Control means comprise as control engineering for controlling the driving of said driving means,
Prior Symbol control means said control step,
If less than the driving amount driving amount predetermined determined based on the previous SL mechanical hysteresis to the stop position of the diaphragm, and the direction of driving in the previous different from the direction toward the stop position, the Driving the diaphragm in the direction opposite to the direction toward the stop position and then driving to the stop position;
If the direction of the driving amount to the stop position of the diaphragm is driven to the predetermined driving amount from the magnitude KuKatsu last is identical to the direction toward the stop position, it suited the aperture in said stop position control method of an imaging device and controls the drive means so that is driven in a square direction.

A control method of a drive control device comprising a drive means for driving a diaphragm having mechanical hysteresis in driving,
  The control means comprises a control step of controlling the drive of the drive means;
  The control means in the control step,
    When the drive amount to the stop position of the stop is smaller than a predetermined drive amount determined on the basis of the mechanical hysteresis, and the previous drive direction is different from the direction toward the stop position, the stop Is driven in the direction opposite to the direction toward the stop position and then driven to the stop position,
    When the drive amount to the stop position of the diaphragm is larger than the predetermined drive amount and the last drive direction is the same as the direction toward the stop position, the diaphragm is moved in the direction toward the stop position. Control the drive means to drive
A control method for a drive control apparatus.

The program for functioning a computer as each means of the imaging device of any one of Claims 1 thru | or 5 .

The program for functioning a computer as each means of the drive control apparatus of any one of Claims 6 thru | or 10.