JPH0980532A - Image blurring correction camera - Google Patents

Abstract

PROBLEM TO BE SOLVED: To reduce power consumption by extremely restricting shake correction when the necessity of the shake correction is not so much excepting in the midst of exposure. SOLUTION: This camera is provided with a shake detection part detecting shake acting on the camera, a shake correction mechanism part (shake correction unit) 30 for changing the optical axis of a photographing optical system in order to correct image blurring caused by the shake, a control part (control circuit) 29 for controlling the shake correction mechanism part based on an output signal from the shake detection part, and a self-timer setting part 56 for setting the self-timer mode of the camera. In the case the setting part 56 is set to the self-timer mode, the driving of the mechanism part 30 excepting in the midst of exposure is restricted or controlled so as not to be performed by the control part 29.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an image blur correction camera capable of correcting image blur caused by camera shake or the like in the camera.

[0002]

2. Description of the Related Art A camera shake caused by a camera is detected by an angular velocity sensor or the like, and the photographing optical system is moved in a direction opposite to the detected blur direction, thereby changing the optical axis of the photographing optical system. An image blur correction camera capable of correcting image blur is known (Japanese Patent Laid-Open No. 2-183217, etc.). FIG. 5 is a block diagram showing an example of a blur correction circuit of a conventional image blur correction camera. The camera includes a camera body 54 and a photographing lens 55 that are electrically connected. In the camera body 54, (DC / D
C) A converter 2, a CPU 3, etc. are provided. On the other hand, in the taking lens 55, a (DC / DC) converter 16, a CPU 12, a CPU 17, etc. are provided.

The battery 1 is loaded in the camera body 54 and supplies power to the camera body 54 and the taking lens 55. The camera body 54 and the taking lens 55 are electrically connected by electrical contacts 6, 7, 8, 9, and 10. The electric contact 6 is provided from the battery 1 via the power supply control switch 4 which is a semiconductor switch to the photographing lens 55.
Is a contact for supplying power to. The electrical contact 7 is a contact for supplying the output of the converter 2 to the taking lens 55. The electrical contacts 8 are a group of contacts for performing communication between the CPU 3 and the master CPU 12. The electrical contact 9 is a GND (ground) line connected to the cathode terminal of the battery 1. The electrical contact 10 is a GND line that is grounded to the metal object of the camera body 54.

The switches 5a and 5b are turned on at the first stroke and the second stroke of the release button of the camera, respectively.
It is a switch for N. When the switch 5a becomes 0N, C
The L level is input to the terminal HAN of PU3. When the switch 5b is turned on, the terminal RLS of the CPU3 is set to L
The level is entered.

The CPU 3 mainly controls the inside of the camera body 54. When the L level is input to the terminal HAN, the CPU 3 controls the start-up of the converter 2 and supplies power to the master CPU 12 and the EEPROM 13 (electrically rewritable non-volatile memory) via the electrical contact 7. Further, the master CPU 12 outputs a power supply request signal for the electric contact 6 to the CPU 3 via the electric contact 8. The CPU 3 controls the power supply control switch 4 from the battery 1.
Power is supplied to the converter 16 from the electrical contact 6.

When power is supplied from the electrical contact 7, the master C
The PU 12 activates the converter 16. Converter 1
6 is a constant voltage regulator circuit 18 and a slave CPU 1
7. Power is supplied to the control circuits of the motor drivers 20 and 23. The constant voltage regulator circuit 18 supplies power to the shake detection circuit and the analog processing circuit 19. Analog processing circuit 1
In the case of 9, since the dynamic range of the signal component is large, the power supply of the processing circuit must also have a low noise level. Here, if the output of the converter 16 is directly used, the noise level is not sufficiently low due to the characteristic that this power supply is a switching power supply. Therefore, power is supplied to the circuit that performs analog processing via the constant voltage regulator circuit 18.

The switches 14a and 14b are 2-bit setting switches for selecting the image blur correction control mode. When the switch 14a is ON, the L level is input to the terminal D1 of the master CPU 12. When the switch 14b is ON, the master CPU1
The L level is input to the second terminal D2.

FIG. 6 shows switches 14a (terminal D1), 1
4 shows the relationship between the setting of 4b (terminal D2) and the correction mode. Switch 14a is L level (ON), switch 1
When 4b is at H level (OFF), the mode is set to perform the correction operation only during the exposure. Also, the switch 14a
Is at the H level and the switch 14b is at the L level, the mode is set to perform the correction operation other than during the exposure (including during the exposure). Furthermore, when both the switches 14a and 14b are at the H level, the mode in which the correction operation is not performed is set.

The blur amount detected by the analog processing circuit 19 is analog-processed and input to the master CPU 12. When the image blur correction mode is set to a mode in which the correction operation is performed other than during exposure (when only the switch 14b is ON), when the switch 5a is turned ON, the master CPU 12 is subjected to analog processing. The amount to drive the motors 21 and 24 is calculated based on the data and transmitted to the slave CPU 17. Slave CPU1
7 outputs the amount to be driven to the motor drivers 20 and 23, and drives the motors 21 and 24.

The motors 21 and 24 convert a rotational movement into a linear movement by a gear or the like (not shown) and drive a correction optical system (not shown). Position detection circuits 22 and 25
Detects the position of the correction optical system due to the rotation of the motors 21 and 24. The position detection circuits 22 and 25 know the deviation from the control amount by the feedback pulse from the photo interrupter element or the like, for example.

When the image blur correction mode is set to a mode in which the correction operation is performed only during exposure (switch 14
In the case where only a is ON), when the switch 5b is turned ON, the correction optical system is driven only during the exposure. The master CPU 12 monitors the voltage of the electrical contact 6 (terminal AN2). When this voltage value is lower than a predetermined value, a warning is issued or control is stopped. The resistance 11 is a low resistance provided so that the potential difference with the electric contact 10 does not become large when the motors 21 and 24 rotate and a large current flows into the electric contact 9.

[0012]

However, the above-mentioned conventional image blur correction camera has the following problems. By setting the mode in which the blur correction is performed other than during the exposure, the image blur correction effect can be confirmed, for example, when the field is observed from the viewfinder in the shooting standby state.
On the other hand, if you perform blur correction continuously except during exposure,
Power consumption increases. Here, except during exposure,
In some cases, it is not necessary to observe the field from the viewfinder. Therefore, even in such a case, there is a problem that uniform blur correction results in waste of power and shortens the battery life.

An object of the present invention is to reduce power consumption by limiting blur correction as much as possible when there is little need to perform blur correction except during exposure.

[0014]

In order to solve the above-mentioned problems, the invention of claim 1 provides a blur detection unit for detecting a blur acting on a camera, and an image pickup for correcting an image blur caused by the blur. A blur correction mechanism unit that changes the optical axis of the optical system, a control unit that controls the blur correction mechanism unit based on the output signal of the blur detection unit, and a self-timer setting unit that sets the self-timer mode of the camera. When the self-timer setting unit is set to the self-timer mode, the control unit limits the drive of the shake correction mechanism unit other than during exposure, or controls not to drive the shake correction mechanism unit. And

According to a second aspect of the present invention, there is provided a blur detecting section for detecting a blur acting on the camera, a blur correcting mechanism section for changing an optical axis of a photographing optical system in order to correct an image blur due to the blur, and A control unit that controls the blur correction mechanism unit based on an output signal of the blur detection unit, a self-timer setting unit that sets a self-timer mode of the camera, and a first mode in which the blur correction mechanism unit is not driven. And a mode switching unit having a second mode for driving the shake correction mechanism unit, wherein the control unit switches the mode when the self-timer setting unit is set to the self-timer mode. When the unit is set to the second mode, the drive of the shake correction mechanism unit other than during exposure is limited or controlled not to be driven.

According to a third aspect of the present invention, there is provided a blur detecting section for detecting a blur acting on a camera, a blur correcting mechanism section for changing an optical axis of a photographing optical system to correct an image blur caused by the blur, and A control unit that controls the shake correction mechanism unit based on the output signal of the shake detection unit, a self-timer setting unit that sets the self-timer mode of the camera, and a drive unit that drives the shake correction mechanism unit only during exposure. 1 mode and a mode switching unit having a second mode in which the blur correction mechanism unit is driven regardless of exposure, the control unit sets the self-timer setting unit to the self-timer mode. In this case, when the mode switching unit is set to the second mode,
It is characterized in that the drive of the shake correction mechanism unit other than during exposure is restricted or controlled not to be driven.

According to a fourth aspect of the present invention, there is provided a blur detecting section for detecting a blur acting on a camera, a blur correcting mechanism section for changing an optical axis of a photographing optical system in order to correct an image blur due to the blur, and A control unit that controls the shake correction mechanism unit based on the output signal of the shake detection unit, a self-timer setting unit that sets the self-timer mode of the camera, and a drive unit that drives the shake correction mechanism unit only during exposure. 1 mode and second driving for driving the shake correction mechanism except during exposure
And a mode switching unit having a mode of, the control unit, when the self-timer setting unit is set to the self-timer mode, when the mode switching unit is set to the second mode. Is characterized in that the drive of the shake correction mechanism section except during the exposure is limited or controlled not to be driven.

[0018]

DETAILED DESCRIPTION OF THE INVENTION An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is a block diagram showing an embodiment of a blur correction circuit of an image blur correction camera according to the present invention, and corresponds to FIG. 5 of a conventional example.
Further, in the present invention, the hardware configuration is the same as the conventional one. 1 is different from the blur correction circuit of FIG. 4 in the following points. This circuit has a camera body 5
A switch 56 is provided on the fourth side. Switch 56
Is a switch for setting the self-timer shooting of the camera. When the switch 56 is turned on, the L level is input to the terminal SELF of the CPU 3. In this state, when the switch 5b is turned on, self-timer shooting is executed. The other points are the same as those in FIG.

FIG. 2 is a block diagram showing the blur correction circuit of FIG. 1 block by block. In FIG. 2, the above-mentioned switch 56 is provided on the camera body 54 side,
Switches 14a and 14b for selecting an image blur correction control mode are provided on the side of the taking lens 55. The control circuit 29 on the side of the taking lens 55 includes switches 14a, 14
The shake correction unit 30 having the correction optical system is driven and controlled based on the states of b and 56 and the instruction from the CPU 3.

FIG. 3 is a block diagram showing the logic for driving the shake correction unit 30. Also, FIG.
Shows a logical value table corresponding to FIG. Here, the part of the present invention different from the conventional example is 6 in the logical table of FIG.
It is the stage (bottom stage) part. That is, the switch 14
When a is at the H level (OFF) and the switch 14b is at the L level (ON), the self-timer photographing is set (when the switch 56 is ON). At this time, originally, the blur correction operation is performed even during the exposure. However, when the self-timer is set, the camera is generally mounted on a tripod or mounted on a suitable table and the photographer is not observing the field from the viewfinder. Therefore, at the time of self-timer shooting, there is no practical benefit of performing blur correction except during exposure. Therefore, in this case, control is performed so that the blur correction operation is performed only during exposure.

In the above embodiment, the switches 14a and 1
4b shows an example in which the correction mode is switched as shown in FIG. 6, but there is a mode in which the shake correction operation is performed only during exposure,
A mode for performing the shake correction operation other than during the exposure may be provided, and both modes may be turned on to set the mode for performing the shake correction operation during the exposure and during the time other than during the exposure. In addition, when a mode for performing blur correction and a mode for not performing blur correction are simply set and the mode for blur correction is set, when the self-timer shooting is set, the blur correction is performed only during exposure. You may control so that it may perform. Furthermore, in the case of a camera that continuously performs blur correction until the power is turned off when the power is turned on, when self-timer shooting is set, control is performed so that blur correction is performed only during exposure. May be. Furthermore, in the above embodiment, when the self-timer shooting is set, the blur correction operation other than during exposure is controlled not to be performed. However, the blur correction operation is not performed completely. May be controlled to be limited.

The embodiment of the present invention has been described above. However, the present invention is not limited to the above-described embodiment, and various modifications can be made within an equivalent range as follows. For example, in the present embodiment, the fact that the self-timer shooting has been set indicates that the camera lens 54 is moved to the shooting lens 55.
Although the determination of the correction mode is performed on the side of the taking lens 55, the information of the correction mode is transmitted from the side of the taking lens 55 to the side of the camera body 54, and the determination of the correction mode is performed on the control device in the camera body 54. The same effect can be obtained even if the procedure is carried out.

[0023]

According to the present invention, the image blur correction operation is not performed when the self-timer photographing is set by the simple structure, so that the power consumption when the field is not observed from the viewfinder is reduced. It can reduce consumption and prolong battery life. According to the third and fourth aspects of the invention, even when the image blur correction operation is set to be performed other than during the exposure, when the self-timer shooting is set, only during the exposure is automatically performed. Since the mode is switched to the image blur correction mode, it is possible to avoid the blur correction mode setting by the photographer's manual operation and prevent the setting error.

[Brief description of drawings]

FIG. 1 is a block diagram showing an embodiment of a blur correction circuit of an image blur correction camera according to the present invention.

FIG. 2 is a block diagram showing the blur correction circuit of FIG. 1 for each block.

FIG. 3 is a block diagram showing by what logic the blur correction unit 30 is driven.

FIG. 4 shows a logical value table corresponding to FIG. .

FIG. 5 is a block diagram showing an example of a blur correction circuit of a conventional image blur correction camera.

FIG. 6 shows switches 14a (terminal D1) and 14b (terminal D).
The relationship between the setting of 2) and the correction mode is shown.

[Explanation of symbols]

 1 Battery 2 Converter 3 CPU 4 Power Supply Control Switch 5a, 5b Switch 6, 7, 8, 9, 10 Electrical Contact 11 Resistance 12 Master CPU 13 EEPROM 14a, 14b Switch 16 Converter 17 Slave CPU 18 Constant Voltage Regulator Circuit 19 Analog Processing Circuit 20, 23 Motor driver 21, 24 Motor 22, 25 Position detection circuit 54 Camera body 55 Photographing lens 56 Switch

Claims (4)

[Claims] 1. A shake detection unit for detecting a shake acting on a camera, a shake correction mechanism unit for changing an optical axis of a photographing optical system to correct an image shake caused by the shake, and an output of the shake detection unit. A control unit that controls the image stabilization mechanism unit based on a signal and a self-timer setting unit that sets a self-timer mode of the camera are provided, wherein the control unit sets the self-timer setting unit to the self-timer mode. The image blur correction camera is characterized in that the drive of the blur correction mechanism unit other than during exposure is restricted or controlled so as not to be driven when exposed. 2. A blur detection unit for detecting blurring acting on a camera, a blur correction mechanism unit for changing an optical axis of a photographing optical system to correct an image blur due to the blur, and an output of the blur detection unit. A control unit that controls the shake correction mechanism unit based on a signal; a self-timer setting unit that sets a self-timer mode of the camera; a first mode in which the shake correction mechanism unit is not driven;
A mode switching unit having a second mode for driving the shake correction mechanism unit; and the control unit, when the self-timer setting unit is set to the self-timer mode, An image blur correction camera, characterized in that when the second mode is set, the drive of the blur correction mechanism unit other than during exposure is restricted or controlled not to be driven. 3. A blur detection unit for detecting blurring acting on a camera, a blur correction mechanism unit for changing an optical axis of a photographing optical system in order to correct an image blur due to the blur, and an output of the blur detection unit. A control unit that controls the shake correction mechanism unit based on a signal, a self-timer setting unit that sets a self-timer mode of the camera, and a first mode that drives the shake correction mechanism unit only during exposure. A mode switching unit having a second mode in which the blur correction mechanism unit is driven regardless of exposure; and the control unit, when the self-timer setting unit is set to the self-timer mode, When the mode switching unit is set to the second mode, the drive of the shake correction mechanism unit other than during exposure is restricted or controlled not to be driven. Image stabilization camera to be considered. 4. A blur detection unit for detecting a blur acting on a camera, a blur correction mechanism unit for changing an optical axis of a photographing optical system to correct an image blur due to the blur, and an output of the blur detection unit. A control unit that controls the shake correction mechanism unit based on a signal, a self-timer setting unit that sets a self-timer mode of the camera, and a first mode that drives the shake correction mechanism unit only during exposure. A mode switching unit having a second mode in which the blur correction mechanism unit is driven during a period other than during exposure, the control unit, in the case where the self-timer setting unit is set to the self-timer mode, When the mode switching unit is set to the second mode, the drive of the shake correction mechanism unit other than during exposure is restricted or controlled not to be driven. An image blur correction camera.