JPH07244313A - Camera for correcting camera shake - Google Patents

Abstract

PURPOSE:To provide a camera for correcting camera shake capable of stopping a camera-shake correcting action without requiring a new independent means. CONSTITUTION:In the camera for correcting camera shake including a detecting part 1 detecting the camera shake and outputting a detection signal based on the result of the detection, a correcting part 4 correcting the camera-shake in response to the detection signal from the detecting part 1, a control part 2 controlling the actuation of the correcting part 4, a timer starting the clocking of a specified time, a stopping part stopping the camera shake correcting action by the correcting part 4 after the specified time clocked by the timer lapsed from the start of the actuation of the correcting part 4 are provided as well.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a camera provided with a shake correction device for correcting image blur caused by camera shake or the like.

[0002]

2. Description of the Related Art In recent cameras, automatic exposure (A
E) mechanism, auto focus (AF) mechanism, etc.
Each mechanism is computerized and highly automated.
As one of such high-performance, there is a correction function for correcting an image blur caused by a camera shake or the like that occurs when a camera is hand-held, and various proposals have been made. With respect to these proposed correction functions, for example, the blur detection is started by half-pressing the release button, and the blur-correction operation based on the blur detection result is performed by the subsequent full-press operation (that is, the blur correction optical system is orthogonal to the optical axis. There is a method in which the shake correction operation or the shake detection operation is stopped by closing the shutter. It is preferable to stop the shake correction and shake detection operations when they are not needed, in order to save power.

[0003]

However, in the case of stopping the shake correction operation by the closing operation of the shutter as described above, a mechanical detecting means for detecting that the shutter is closed. Is newly required,
Furthermore, since a large amount of software capacity is required for control, it is inevitable that the cost will be increased when configuring the camera.

The present invention has been made in view of the above problems, and it is an object of the present invention to provide a camera shake correction camera capable of stopping the camera shake correction operation without requiring any additional means. The first purpose. Furthermore, the present invention is configured to stop the shake correction operation after a predetermined time has elapsed in order to stop the shake correction operation without requiring new additional means. The second purpose is to set it as the most suitable value.

A third object of the present invention is to control such that the shake correction operation and the focusing return operation or the film feeding operation are not performed at the same time.

[0006]

According to the present invention, there is provided a detection section for detecting blur and outputting a detection signal based on the detection result; and a correction section for correcting blur according to the detection signal from the detection section. A blur correction camera including a control unit that controls the operation of the correction unit, and a correction unit that starts a time measurement of a predetermined time and the correction unit after the predetermined time measured by the timer has elapsed from the start of the operation of the correction unit. And a stop unit for stopping the shake correction operation according to.

[0007] Then, it is configured such that the start of counting of the predetermined time is performed due to the full-press operation of the shutter release operating member or after the end of the counting time of the self-timer. Further, the blur correction camera according to the present invention includes an exposure control unit that controls an exposure operation, and the stop unit causes the blur correction operation by the correction unit after a lapse of a time longer than a maximum time that the exposure control unit can control. To stop.

Further, the correction unit according to the present invention outputs a start signal in association with the start of the blur correction, and the blur correction camera starts the timing with the start signal. A second timer; a focusing control unit that brings a focusing operation by moving a focusing lens; and a feeding control unit that controls a film feeding operation, and the second timer includes the focusing controller. A predetermined time until the return operation of the focusing lens by the control unit or the feeding operation for one frame of the film by the feeding control unit is started is measured, and the time measured by the second timer is the first timer. It is set longer than that.

[0009]

According to the present invention, the shake correction operation by the correction unit is stopped after the elapse of a predetermined time counted by the timer from the start of the operation of the correction unit, so that a new separate member is not required and, as a result, the software There is no increase in cost because the capacity is not increased at all.

Further, since the exposure control section for controlling the exposure operation is included, the stop section stops the blur correction operation by the correction section after a lapse of a time longer than the maximum controllable time by the exposure control section. It can be set as the most suitable value in the shooting sequence. Furthermore, since the time count for starting the return operation of the focusing lens and the feeding operation for one frame of film is set longer than the time count for stopping the shake correction operation, The focusing return operation or the film feeding operation is not performed at the same time, and the large current control need not be performed.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 shows an embodiment of a blur correction camera according to the present invention. In the drawing, the outline of the internal structure of a still camera suitable for application of the present invention will be briefly described. Reference numeral 1 in the drawing is a shake amount detecting means which is a shake detecting means for detecting a shake situation due to camera shake or the like, and a shutter release button (not shown) provided on an operation member, for example, an upper surface of the camera. The half-push switch SW1 is turned on by the half-push operation of, and the CPU 2 provided in the camera activates the shake amount detection means 1 by this, and the sensor signal for calculating the shake detection reference level for detecting the shake amount. Start sampling. Where CP
U2 is used as shake detection control means together with the half-press switch SW1 of the release button. This CPU2 has 3
Contains two timers. First, one of them is a timer (which will be referred to as a first timer) that starts counting a predetermined time due to turning on of the full-press switch SW2. This first
The blur correction operation is stopped after the elapse of a predetermined time by the timer. Then, in the case where the self-timer mode is set, it is a timer (which will be referred to as a second timer) that starts counting a predetermined time due to the full-push switch SW2 being turned on. The shutter release (exposure) is performed after a lapse of a predetermined time by the second timer. Further, it is a timer (which will be referred to as a third timer) that starts counting a predetermined time due to the turning on of the full-press switch SW2. After the elapse of a predetermined time by the third timer, the focusing return operation and the film wind-up by one frame are executed. The stop of the shake correction operation, the display, the focusing return operation, and the film winding of one frame will be described later.

A green lamp 3 in the figure uses a green lamp in the finder as a display unit, and the CPU 2 causes the lamp 3 to blink or light up in response to activation of the shake amount detecting means 1 or an output signal of the detecting means 1. Specifically, when the release button is half-pressed, the shake amount detecting means 1 is started and the CPU 2 blinks the lamp 3, and after a lapse of a predetermined time, according to the output signal of the shake amount detecting means 1, the detection of the camera body When the shake amount is less than the predetermined amount, the CPU 2 causes the lamp 3
Is turned on, and by blinking or turning on the lamp 3, the photographer can determine whether or not the photograph is appropriate. The display unit 3 need not be a green lamp in the finder, but may be a lamp provided on the rear surface of the camera body and arranged near the finder window.

Reference numeral 4 is a shake correction means provided in the camera. When the shutter release button (not shown) is fully pressed, the full-press switch SW2 is turned on and the CPU2
Instructs the shake correction unit 4 to perform correction based on the detection (the shake amount) of the shake amount detection unit 1, and the shake correction unit 4 drives a part of the optical system (shake correction optical system L3) of the photographing optical system L1. The system 5 is driven, and the shake correction optical system L3 is shift-driven in the vertical direction (direction perpendicular to the optical axis) in the figure, and the drive can correct the image shake of the subject image on the film surface in the entire photographing optical system. This is well known. Then, after that, the driving of the drive system 5 is stopped after a predetermined time (time measured by the first timer) has elapsed. Reference numerals 6 and 7 are known distance measuring means for obtaining information corresponding to the distance to the object and known light measuring means for measuring the object brightness.
By pressing the shutter release button halfway (SW1 on),
The CPU 2 activates the distance measuring means 6 and the photometric means 7, and upon activation thereof, the respective means 6, 7 perform distance measurement and photometry.

Reference numeral 8 is a focusing control means, and the CPU 2 commands the focusing control means 8 to a predetermined lens position (automatic focusing) according to the output (distance measurement result) signal of the distance measuring means 6, and the focusing is performed by this command. The control means 8 drives the focusing optical system (focusing lens) L2 through a drive system 9 (focusing drive means) to drive the optical system L.
2 to drive the lens L to a predetermined position by this drive.
It is designed to make 2 moves.

Reference numeral 10 is an exposure control means, and the CPU 2 instructs the exposure control means 10 to control the aperture corresponding to the aperture value in response to the output (photometry result) signal of the photometry means 7. The exposure control means 10 is a diaphragm member 11.
The exposure is controlled by controlling the drive of the (shutter). Reference numeral 12 denotes a film feeding control means, which automatically feeds a film according to the loading of the film, winds one frame at the end of the exposure operation for one frame, and automatically moves at the end of the exposure of all the frames. Rewinding, arbitrary midway rewinding, etc. are executed.

Incidentally, the camera of this embodiment can also set a self-timer function (mode). This setting is achieved by the CPU 2. When the self-timer mode is set, the full-press switch SW2 is turned on to start counting a predetermined time (time counting by the second timer), and after that time, shutter release (exposure) is performed. When the time counting is started, a display unit (not shown) visible from the outside lights up to inform that the camera is set to the self-timer mode. After this, when the time measurement ends, the display unit goes out and the shutter release (exposure) continues. If the above-mentioned lamp 3 is configured to be visible from the outside, the above-mentioned display section may also be used as this.

Next, the operation of this embodiment will be described. 2 and 4 are flowcharts showing the operating sequence of the CPU 2, and referring to these flowcharts, FIG.
The sequence operation according to the structure will be described below. In addition,
This flowchart starts with the main power of the camera body turned on. [First Embodiment] In step S2, it is determined whether the half-press switch SW1 is on or off. In step S3, the sensor of the blur detection means is activated. In step S4, photometry for exposure calculation is performed. After obtaining information corresponding to the distance to the subject for focusing (focusing), the amount of movement of the lens is calculated in step S7, and the lens is driven for focusing in step S8.

In step S9, it is determined whether the full-press switch SW2 is on or off. If it is on, it is determined in step S10 whether or not the self-timer mode is set. If it is not in the self-timer mode, the blur correction means is operated in step S15. A timer for stopping (first timer) is started, and it is determined whether or not the timer is up in step S17. When a time longer than the longest exposure time (measured by the first timer) elapses, shake correction is performed. After stopping, the sensor is turned off in step S20, and the blur correction sequence ends in step S28.

On the other hand, in the photographing sequence, step S21
After waiting for a fixed time until the shake correction drive completely (reliably) starts, the exposure (shutter opening / closing) operation is started in step S23. After the exposure is completed, the focusing lens is returned to the initial position in step S24 (focusing return operation). Thereafter, the film is wound up by one frame in step S25.

In this flowchart, step S
The processing from 15 onward is branched into two systems (the processing of steps S15 to 28 and the processing of steps S21 to 27), and the processing is performed in parallel. The branching of this processing is the same for the second embodiment (FIG. 3) described below. In FIG. 2, the exposure operation in step S23 is completed at least until the shake correction is stopped in step S18. The focus return operation in step S24 is preferably executed after the timer is turned off in step S20.

If the Celsius timer mode is set in step S10, the timer (second timer) is started in step S11, the display of the self-timer photographing state is started (lighted) in step S12, and step S13 is performed. Then, after a lapse of a timer time (measured by the second timer) different from the timer time for stopping the shake correction (or in accordance with the lapse of time), the process proceeds to step S15. As a result, the blurring correction is performed for a predetermined time (that is, the first pressing switch SW2 is turned on in this embodiment) regardless of self-timer shooting and normal shooting.
Since it can be stopped after the passage of (or with the passage of time), the shake correction sequence can be terminated and stopped without using the shutter closing signal.

[Second Embodiment] FIG. 3 shows a second embodiment of the present invention. In FIG. 3, the operation of steps S101 to 114 is the same as that of FIG. In step S115, the first timer for the shake correction sequence (stopping the shake correction) and the third timer for the shooting sequence (focus return operation and film one-frame winding) are started. If the shake correction operation is started in step S116, and the first timer measures the set time longer than the maximum exposure time in step S117, the shake correction is stopped in step S118, and the sensor is turned off in step S119. In S120, the timer is turned off (clocking is stopped), and a series of sequences is ended.

In step S122, when the photographing sequence (in this case, exposure, focus return after that, and film frame winding) is started, step S122 is performed.
After waiting for a certain time until the shake correction driving in 116 completely (reliably) starts, the exposure operation (shutter opening / closing) is started in step S123, and the third timer (timer for shooting sequence) is started in step S124. If the set time longer than the maximum exposure time is measured, step S125
To return the focusing lens to the initial position (focusing return operation), and in step S126, set the film to 1
The frame is wound by one frame, the third timer is turned off (time counting is stopped) in step S127, and a series of photographing sequences is ended in step S128. In this way, the time until the return operation of the focusing lens and the feeding operation for one frame of the film are executed (in other words, the standby time, the time is measured by the third timer) until the shake correction operation is stopped Since the time is set longer than the time measured (measured by the first timer), the focusing return operation and the film feeding operation (winding for one frame) are performed after the shake correction operation is completed. That is, the shake correction operation, the focusing return operation, and the film feeding operation are not performed simultaneously (in parallel), and the large current control need not be performed.

[Third Embodiment] FIG. 4 shows a third embodiment of the present invention. Similar to the second embodiment, only the differences will be described. In the third embodiment, after elapse of a set time (measurement by the first timer) longer than the maximum exposure time (step S2).
After 17), the blur correction is stopped (step S219), the sensor is turned off (step S219), the focusing return operation (step S220), and the winding of one film frame (step S220) is executed. The characteristic point of this third embodiment is that the stop of the shake correction operation, the focus return operation, and the film winding are executed in time series under the control of one timer.

In step S217, it is judged whether or not a set time longer than the maximum exposure time has elapsed. Before the set time elapses, the exposure operation, in other words, shutter release is started. Shall be completed. In the third embodiment, the structure can be simplified because the stop of the shake correction operation, the focus return operation and the film winding are executed in time series under the control of one timer.

[0026]

According to the present invention, since the shake correction operation by the correction unit is stopped after the elapse of a predetermined time counted by the timer from the start of the operation of the correction unit, a new separate member is not required and the result is eliminated. However, there is no increase in cost because the software capacity is not increased at all.

Further, the exposure control unit for controlling the exposure operation is included, and the stop unit stops the shake correction operation by the correction unit after a lapse of a time longer than the maximum time that the exposure control unit can control. It can be set as the most suitable value in the shooting sequence. Furthermore, since the timekeeping time for the return operation of the focusing lens and the feeding operation for one frame of film is set longer than the timekeeping time for the stop of the shake correction operation, the shake correction operation and the focusing return operation or the film feed operation are set. The operation does not occur at the same time, and there is no need to perform large current control.

[Brief description of drawings]

FIG. 1 is a schematic structural diagram showing an internal structure of a camera showing an embodiment of a blur correction camera according to the present invention.

FIG. 2 is a flowchart showing an operation sequence by a CPU in the first embodiment of the present invention.

FIG. 3 is a flowchart showing an operation sequence by a CPU in the second embodiment of the present invention.

FIG. 4 is a flowchart showing an operation sequence by a CPU in the third embodiment of the present invention.

[Explanation of symbols]

 1 shake amount detection means 2 CPU 4 shake correction means 5 shake correction drive system 8 focusing control means 9 focusing drive system 10 exposure control means 12 film feeding control means L1 photographing optical system L2 focusing optical system (focusing lens) L3 shake correction Optical system (shake correction lens) SW1 Shutter release button half-press switch SW2 Shutter release button full-press switch

Claims (5)

[Claims] 1. A detection unit that detects a blur and outputs a detection signal based on the detection result; a correction unit that corrects the blur according to a detection signal from the detection unit; and an operation of the correction unit. In a blur correction camera including a control unit, a timer that starts timing of a predetermined time, and the blur correction operation of the correction unit is stopped after the predetermined time counted by the timer has elapsed from the start of operation of the correction unit. An image stabilization camera including a stop portion. 2. The blur correction camera according to claim 1, wherein the start of timing of the predetermined time is performed due to a full-press operation of the shutter release operation member. 3. The shake correction camera according to claim 1, wherein the start of counting the predetermined time is performed after the end of the counting time of the self-timer. 4. The blur correction camera includes an exposure control unit that controls an exposure operation, and the stop unit controls the blur by the correction unit after a lapse of a time longer than a maximum controllable time of the exposure control unit. The blur correction camera according to claim 2, wherein the correction operation is stopped. 5. The blur correction camera outputs a start signal when the blur correction is started, and the blur correction camera starts timekeeping by the start signal. A timer; a focusing controller that brings a focusing operation by moving a focusing lens; and a feeding controller that controls a film feeding operation, and the first timer is configured to perform the blur correction operation. The second timer counts a predetermined time until the stop, and the second timer until the focus control section returns the focusing lens or the feed control section starts a film one-frame feeding operation. 2. The blur correction camera according to claim 1, wherein a predetermined time is measured, and a time measured by the second timer is set longer than that of the first timer.