JPH07311397A - Photographing device provided with shake correcting function - Google Patents

Abstract

PURPOSE:To easily restrain the unnecessary power consumption without interrupting control inadvertently by continuing the operation of a shake correction control means only for a specified time from designated start time and stopping the operation after the specified time. CONSTITUTION:In the case where a program is started and a VR(vibration reduction) switch 22 is turned off, the operation is returned; and in the case where the VR switch 22 is turned on and a VR actuation flag is set, the updated input time of a VR actuation switch 27 is read and the updated present time is read. Then, a time difference T between the read input time of the switch 27 and the read present time is calculated. In the case where the time difference T is more than 30 seconds, vibration-proof control is stopped and the VR actuation flag is cleared and the operation is returned. Meanwhile, the time difference T is equal to or less than 30 seconds, the operation is returned after executing the vibration-proof control.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a photographing device having a shake correcting function such as a camera.

[0002]

2. Description of the Related Art Conventionally, in a photographing device such as a camera,
F (Auto Focus) devices have become popular, and
It has been proposed to add a shake correction device that corrects camera shake. A shake correction device detects an angular variation of an optical axis due to camera shake or the like and corrects a photographed image by this, as an image blur correction photographing device disclosed in Japanese Patent Laid-Open No. 2-66535 (an example of a single lens optical system) and It is disclosed in Kaihei 2-183217 (an example of image correction by shifting a part of a photographing optical system of an internal focusing type telephoto lens).

[0003]

However, in such an image taking apparatus, the user of the image taking apparatus needs the control operation instructing means whenever the shake correcting control is necessary or when the shake correcting control is not necessary. It was necessary to select either the operation or the continuous operation of the shake correction control means during execution of the shake correction control. Therefore, there are problems that the operation becomes complicated and power is unnecessarily consumed.

Further, in a photographing apparatus which executes shake correction control in synchronization with a power holding function of a body device for a predetermined time, when shake correction control is required independently of the body device or when shake correction control is unnecessary, The control operation instructing means must be operated each time, and there are problems that the operation becomes complicated and control is inadvertently interrupted.

The present invention has been made in view of the above problems, and an object thereof is to suppress unnecessary power consumption by a simple operation without inadvertently interrupting control.

[0006]

In order to achieve this object, a photographing apparatus having a shake correcting function of the present invention has a shake detecting means for detecting shake of a camera, and a shake correcting means based on an output of the shake detecting means. A shake correction drive means for performing an operation, a shake correction control means for controlling the shake correction drive means based on the output of the shake detection means, and a control operation instruction means for instructing the shake correction control means to perform a control operation, The shake correction control means, when a control operation is instructed by the control operation instructing means, continues the operation of the shake correction control means for a predetermined time from the start time instructed by the control operation instructing means, and shakes after the elapse of the predetermined time. It is configured to stop the operation of the correction control means.

[0007]

In the image pickup apparatus having the shake correction function having the above structure, when the shake correction control operation is instructed by the control operation instructing means, the shake correction control is continued for a predetermined time from the start of the shake correction control, and the shake correction control is continued. It has a function to stop the shake correction control after a lapse of time and a function to replace the shake correction control start time with the instructed time when the shake correction control operation is instructed again during a predetermined time. Is a control operation instructing means when shake correction control is required.
If the operation is performed once, the shake correction control can be continued for a predetermined time, and after the predetermined time has elapsed, the shake correction control can be automatically stopped, and unnecessary operation of the shake correction operating means is eliminated. Further, when the shake correction control is required, the control is not inadvertently interrupted by the power source holding function for a predetermined time, and the subject observation having the shake correction effect can be continued.

[0008]

Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 is a block connection diagram showing an embodiment of an image pickup apparatus having a shake correction function according to the present invention.

In FIG. 1, a photographing device having a shake correction function is divided into a lens device 1 and a body device 2. In the lens apparatus 1, 3 is a microcomputer for an ultrasonic motor. Reference numeral 4 denotes a lens contact, which is an electric contact group used for exchanging signals with the camera body. An X encoder 5 detects the amount of movement of the optical system in the X-axis direction. 6
Is an X encoder IC, which converts the amount of movement of the optical system in the X-axis direction into a signal and sends it to the image stabilization control microcomputer 25. An X motor 7 shifts and drives the X-axis image blur correction optical system. An X-axis motor driver 8 drives an X-axis drive motor. A Y encoder 9 detects the amount of movement of the optical system in the Y axis direction. 10 is a Y encoder I
C, which converts the amount of movement of the optical system in the Y-axis direction into a signal and sends it to the image stabilization control microcomputer 25. A Y motor 11 shifts and drives the Y-axis image blur correction optical system.
A Y motor driver 12 drives the Y axis drive motor.

Reference numeral 13 denotes an image stabilization state detection circuit, which converts the image blur information into an electric signal. A zoom encoder 14 detects a lens focal length position and converts it into an electric signal. A distance encoder 15 detects a focus position and converts it into an electric signal. Reference numeral 16 is a DC-DC converter, which supplies a stable DC voltage against fluctuations in the battery voltage. A USM (Ultra Sonic Moter) encoder 17 detects the amount of movement of the ultrasonic motor. Reference numeral 18 denotes a USM encoder IC, which converts the ultrasonic motor movement amount into a signal and sends it to the ultrasonic motor microcomputer 3. An ultrasonic motor 19 drives a focus adjustment optical system. Reference numeral 20 denotes an ultrasonic motor driving circuit, which has two driving signals having a driving frequency peculiar to the ultrasonic motor and having a 90 ° phase difference with each other. Reference numeral 21 denotes an ultrasonic motor IC, which interfaces between the ultrasonic motor microcomputer 3 and the ultrasonic motor drive circuit 20.

Reference numeral 22 is a VR (Vibration Reduction) switch for switching the shake correction drive ON / OFF and the shake correction mode (mode 1 or mode 2). Reference numeral 23 is a body device microcomputer. Reference numeral 24 is a communication microcomputer. Reference numeral 25 is a microcomputer for image stabilization control. A release switch 26 is a switch that determines the transmission timing of the shake correction control signal when the user of the photographing apparatus transmits the start of exposure control to the body apparatus 2 and is designated in the image stabilization control start switch determination processing. Is. 27 is a VR operation switch,
Determines whether to activate the image stabilization drive control. The image stabilization drive control is started from the timing when the VR operation switch 27 is turned on.

FIG. 2 is a flow chart for explaining the operation of the lens device 1 and the body device 2.

In step S200, the communication microcomputer 24 prepares for communication. At the same time, the image stabilization control microcomputer 25 prepares for communication in step S201. At the same time, the ultrasonic motor microcomputer 3 prepares for communication in step S202.

In step S203, the communication microcomputer 24 obtains an instruction from the body device microcomputer 23. In step S204, the focus control instruction received from the body is transmitted to the ultrasonic motor microcomputer 3. In step S205, the ultrasonic motor microcomputer 3 performs focusing control based on the information of the zoom encoder 14 and the information of the distance encoder 15.
In step S206, the image stabilization control instruction is transmitted to the image stabilization control microcomputer 25. In step S207, the image stabilization microcomputer 25 performs image stabilization calculation. In step S208, the image stabilization microcomputer 25 performs image stabilization control.

FIG. 3 is a sectional view for explaining an embodiment of an image pickup apparatus having a shake correction function according to the present invention.

In FIG. 3, reference numeral 2 is a body device. Two
Reference numeral 9 denotes a shake correction lens drive unit, which is a motor for driving the shake correction lens (X motor 7 and Y motor 1 in FIG. 1).
(Corresponding to 1). Reference numeral 1 is a lens device. Reference numeral 31 denotes a shake detection sensor, which is a shake detection sensor for detecting shake of the optical axis. 32 is a lens device controller,
The lens device control unit includes a communication microcomputer 24 and an image stabilization control microcomputer 25.
Reference numeral 4 denotes a lens contact, which is an electrical contact group used for exchanging signals between the lens device 1 and the body device 2. Reference numeral 34 denotes a body device control unit, which is a body control unit including the body device microcomputer 23 that communicates with the lens device 1. An ultrasonic motor 19 for driving the focus correction lens drives the focus correction lens by a progressive vibration wave.

FIG. 4 is a flow chart for explaining the operation of the timer interrupt module of the image stabilization control microcomputer 25 of FIG. When the program starts, the value of the current time is updated in step S400. In step S401, the image stabilization control module is called.

FIG. 5 is a flow chart for explaining the operation of the VR actuation switch external interrupt module of the image stabilization control microcomputer 25 of FIG. 1 according to the present invention.
When the program starts, VR is performed in step S500.
It is determined whether an interrupt occurs at the falling edge or the rising edge of the operation switch 27. If an interrupt occurs at the rising edge, the process returns, and if an interrupt occurs at the falling edge, the process proceeds to step S501.

In step S501, the input time of the VR operation switch 27 is replaced with the current time to update the input time of the VR operation switch 27. Step S50
At 2, the VR activation flag is set.

FIG. 6 is a flow chart for explaining the operation of the image stabilization control holding function of the image stabilization control microcomputer 25 of FIG. 1 according to the present invention. When the program starts, it is determined in step S600 whether the VR switch 22 is on. When the VR switch 22 is off, the process returns. If the VR switch 22 is on, the process proceeds to step S601.

In step S601, step S502.
If the VR operation flag is set in (Fig. 5),
It proceeds to step S602. When the VR operation flag is cleared, the process returns.

In step S602, step S501
The input time of the VR operation switch 27 updated in (FIG. 5) is read. In step S603, step S400
The current time updated in (Fig. 4) is read. Step S
In step 604, the time difference T between the input time of the VR operation switch 27 read in step S602 and the current time read in step S603 is calculated. In step S605,
It is determined whether the time difference T calculated in step S604 is larger than 30 seconds.

If the time difference T is larger than 30 seconds, the flow advances to step S607 to stop the image stabilization control. In step S608, the VR operation flag is cleared and the process returns. If the time difference T is equal to or smaller than 30 seconds in step S604, the process proceeds to step S606 to execute image stabilization control, and then returns.

As described above, when the user of the photographing apparatus needs the image stabilization control, if the VR operation switch 27 is operated once, the image stabilization control is continuously executed for a certain time, and after the certain time elapses automatically. It is possible to stop the
The operation switch 27 is not operated.

Further, since the shake correction control is executed independently of the power source holding function of the body device for a certain period of time, when the photometry control and the focus correction control of the body device are unnecessary and the image stabilization control is necessary, the shake prevention control is performed. Unnecessary power consumption can be suppressed by activating only vibration control.

Further, when the image stabilization control is required, the power source holding function of the body device does not inadvertently interrupt the control, and the object observation with the shake correction effect can be continued.

The present invention has been described above with reference to the embodiments.
Various modifications are possible according to the technical idea of the present invention. For example, in the above-described embodiment, the image pickup apparatus having the shake correction function having the communication means for communicating between the lens device and the body device has been described, but the shake correction function having no such communication means is provided. The present invention can also be applied to a photographing device.

Further, although it has been described that the shake correction control is executed on the lens device side independently of the power holding function of the body device for a predetermined time, a common control device (CPU for controlling both the lens device and the body device) It is also possible to apply the present invention to an image pickup apparatus having a shake correction function that has

[0030]

As described above, according to the photographing apparatus having the shake correcting function of the present invention, when the control operation is instructed by the control operation instructing means, the control operation instructing means gives a predetermined time from the start time instructed by the control operation instructing means. Since the operation of the shake correction control means is continued for a certain period of time, and the operation of the shake correction control means is stopped after the lapse of a predetermined time, the control is not inadvertently interrupted, and unnecessary power consumption is possible with a simple operation. It becomes possible to suppress consumption.

[Brief description of drawings]

FIG. 1 is a block connection diagram showing an embodiment of an image pickup apparatus having a shake correction function according to the present invention.

FIG. 2 is a flowchart showing an embodiment of an image pickup apparatus having a shake correction function according to the present invention.

FIG. 3 is a sectional view showing an embodiment of an image pickup apparatus having a shake correction function according to the present invention.

FIG. 4 is a flowchart showing an embodiment of an image pickup apparatus having a shake correction function according to the present invention.

FIG. 5 is a flowchart showing an embodiment of an image pickup apparatus having a shake correction function according to the present invention.

FIG. 6 is a flowchart showing an embodiment of an image pickup apparatus having a shake correction function according to the present invention.

[Explanation of symbols]

 1 Lens Device 2 Body Device 3 Microcomputer for Ultrasonic Motor 14 Zoom Encoder 15 Distance Encoder 20 Ultrasonic Motor Drive Circuit 22 VR Switch 23 Microcomputer for Body Device 24 Microcomputer for Communication 25 Microcomputer for Vibration Control 27 VR Operation Switch

─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. ⁶ Identification code Internal reference number FI technical display location G03B 13/36 17/00 Z Q

Claims (4)

[Claims] 1. A shake detection means for detecting shake of a camera, a shake correction drive means for performing shake correction operation based on an output of the shake detection means, and a shake correction drive based on an output of the shake detection means. A shake correction control means for controlling the means, and a control operation instructing means for instructing the shake correction control means to perform a control operation, wherein the shake correction control means is provided when the control operation is instructed by the control operation instructing means. The shake correction is characterized in that the operation of the shake correction control means is continued for a predetermined time from a start time instructed by the control operation instruction means, and the operation of the shake correction control means is stopped after the predetermined time has elapsed. Imaging device with functions. 2. The shake correction control means according to claim 1, wherein when the control operation instructing means instructs the control operation, the shake correction control means performs a predetermined time from a start time instructed by the control operation instructing means. The operation of the means is continued, the operation of the shake correction control means is stopped after the lapse of the predetermined time, and during the predetermined time, when the control operation is instructed again by the control operation instructing means, the start time is set. An image pickup apparatus having a shake correction function, characterized in that the image pickup apparatus is replaced with an instructed time again. 3. The focus correction unit according to claim 1, further comprising a focus correction unit that performs focus correction, wherein the shake correction control unit gives an instruction by the control operation instruction unit when the control operation instruction unit gives a control operation. The operation of the shake correction control unit and the focus correction unit is continued for a predetermined time from the started time, and the operation of the shake correction control unit and the focus correction unit is stopped after the predetermined time has elapsed. An imaging device with a shake correction function. 4. The focus correction device according to claim 2, further comprising focus correction means for performing focus correction, wherein the shake correction control means instructs the control operation instruction means when the control operation instruction means instructs the control operation. The operation of the shake correction control means and the focus correction means is continued for a predetermined time from the start time, and the operation of the shake correction control means and the focus correction means is stopped after the predetermined time has elapsed, and the predetermined time An imaging apparatus having a shake correction function, wherein when the control operation is instructed again by the control operation instructing means, the start time is replaced with the time instructed again.