JPH07218947A - Image blurring correction camera - Google Patents

Abstract

PURPOSE:To prevent needless photographing by displaying detection output from an image blurring detection means on a display means when a shake correction execution signal generating means generates an execution signal. CONSTITUTION:A CPU circuit 2 judges shutter speed based on the result of photometry (object luminance) by a photometry means(a photometry element, a photoelectric conversion element, an SPD and a CCD) 7. When the shutter speed is equal to or above a specified value or a shake correction selection switch SW3 is in an on-state, a shake amount detection means 1 is started and a lamp 3 is flickered by the half-depressing operation of a release button. When a judging means in the CPU circuit 2 judges based on an output signal from the detection means 1 after a specified time elapses that the shake amount of a camera main body is smaller than a specified amount, the CPU circuit 2 lights the lamp 3. A photographer judges the propriety of photographing by the flickering and the lighting of the lamp 3. When the shake correction execution signal generating means generates the execution signal, the display means is actuated.

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 for correcting image blur caused by camera shake or the like.

[0002]

2. Description of the Related Art In a conventional camera of this type, even if it has an image blur detecting means for detecting an image blur, the suitability of photographing is displayed only in terms of exposure and shutter speed.

[0003]

However, even if it is suitable for shooting in terms of exposure and shutter speed, it may not be suitable for shooting in terms of camera shake. Therefore, there is a problem that useless shooting is performed.

The present invention has been made in view of the above problems, and it is an object of the present invention to prevent useless shooting by displaying the suitability of shooting including information on image blur.

[0005]

In order to achieve this object, an image blur correction camera of the present invention comprises an image blur detection means for detecting image blur, an image blur correction means for correcting image blur, and
The image blur correction means includes an image blur correction execution signal generation means for generating an execution signal for instructing the image blur correction means to operate, and a display means for displaying the image blur based on the detection output of the image blur detection means. The blur correction execution signal generating means is configured to operate when the execution signal is generated.

[0006]

In the image blur correction camera having the above structure, the display means is activated when the blur correction execution signal generating means generates the execution signal. Therefore, whether or not the photographing is appropriate is displayed including the information on the image blur. This makes it possible to prevent useless shooting.

[0007]

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 blur correction camera according to the present invention.

In FIG. 1, reference numeral 1 is a blur amount detecting means (image blur detecting means), which is operated by an externally operable operation member, for example, the release button 100 shown in FIG. The instruction switch, the first switch) is turned on, the CPU circuit (control means) 2 activates the shake amount detecting means 1 (speed sensor, acceleration sensor, angular velocity sensor, angular acceleration sensor, etc.), and the shake amount after a predetermined time. The detection means 1 detects the camera shake amount (displacement amount, camera shake amount) of the camera body. The CPU circuit 2 has a release button 100.
It is used as a detection control means together with the half-press switch SW1. Reference numeral 3 is a lamp used as a display unit, and a green lamp in the finder is used (see FIG. 8). The lamp 3 is also used for displaying the photometric result of the photometric means 7. The CPU circuit 2 controls activation of the blur amount detecting means 1 and lighting or extinguishing of the lamp 3 according to an output signal of the blur amount detecting means 1.

The CPU circuit 2 determines the shutter time from the photometric result (subject brightness) by the photometric means (photometric element, photoelectric conversion element, SPD, CCD) 7, and the shutter time is a predetermined value (for example, for the photographic lens). Halfway press operation of the release button 100 when the reciprocal time of the focal length is 1/80 second or more when the focal length of the taking lens is 80 mm) or when the shake correction selection switch SW3 (third switch) is in the ON state. As a result, when the shake amount detection means 1 is activated, the lamp 3
Blinks (first state). When the determination means in the CPU circuit 2 determines from the output signal of the blur amount detection means 1 that the blur amount of the camera body is smaller than the predetermined amount after a predetermined time has elapsed, the CPU circuit 2 turns on the lamp 3 ( Second state). The blinking or lighting of the lamp 3 enables the photographer to determine whether or not the photographing is appropriate.

The lamp 3 may be a lamp provided near the finder window on the rear surface of the camera as shown in FIG. 3, instead of the lamp in the finder. FIG. 3 shows the lamp 3 and the finder eyepiece 20.
It is a rear view which shows the positional relationship with 0. Reference numeral 201 in FIGS. 3 and 8 denotes a display lamp indicating that charging for stroboscopic light emission has been completed.

When the switch SW3 is on, the release switch SW2 is pressed by fully pressing the release button 100.
When the (second switch, shake correction execution switch) is turned on, the CPU circuit 2 commands the shake correction unit 4 to perform correction according to the detection output of the shake amount detection unit 1. Blur correction means 4
The (image blur correction means) drives the drive system 5 of the photographing optical system L1 to correct the image blur. Distance measuring means (photoelectric conversion element,
The charge storage element type device, CCD, SPD) 6 and photometric means 7 are known distance measuring means and photometric means, and the CPU circuit 2 activates the distance measuring means 6 or the photometric means 7 by half-pressing the release button 100. To do. Upon activation, the distance measuring means 6 and the photometric means 7 start distance measurement or photometry, respectively.

The CPU circuit 2 commands the focusing control means 8 to perform auto-focusing (automatic focusing, AF) according to the output signal (distance measurement result, defocus amount) of the distance measurement means 6, and the focusing control means 8 operates. The photographing optical system L2 is driven to perform autofocus (automatic focusing, AF). In addition, according to the output signal (photometry result) of the photometric means 7, the exposure control means 10 is instructed to control the diaphragm, and the exposure control means 10 drives the diaphragm member 11 to control the diaphragm.

An externally operable switch button 101 shown in FIG.
The (shake correction selection switch) is a self-reset type switch that constitutes the switch SW3 of FIG. 1 and turns on the switch SW3 while the switch button 101 is being pressed and turns off the switch SW3 when the switch button 101 is released. When the switch SW3 is on, the blur correction unit 4 is driven based on the detection output of the blur amount detection unit 1.

FIG. 4 shows a state in which the photographer holds the camera in order to turn on the switch button 101. The switch button 101 is a switch button that constitutes the shake correction selection switch SW3. Since the switch button 101 is arranged on the opposite side of the release button 100 with the photographic lens in between, it is necessary to hold the camera with both hands when operating the switch button 101, and to suppress camera shake caused by stopping the shake correction operation as much as possible. be able to.

The structure of the shake correction selection switch SW3 is shown in FIG.
Shown in. 107 is a rubber, 105 is a camera cover, 10
2 is a conductive rubber (conductive member, non-metal conductive member, elastic member,
Elastic conductive member), 106 is a printed wiring board, and 103 and 104 are conductors. When the rubber 107 is pushed, the conductor portion 103 and the conductor portion 104 are short-circuited by the conductive rubber 102, and the switch button 101 is turned on.
When the pressing of the rubber 107 is stopped, the conductive force of the rubber 107 separates the conductive rubber 102 from the conductors 103 and 104, and the switch button 101 is turned off.

6 and 7 are flow charts for explaining the operation of the CPU circuit (control means) 2 shown in FIG.

When the power switch (not shown) of the camera is turned on, the program starts (step S
1). The release button 100 is half pressed to wait for the switch SW1 to be turned on (step S2), and then it is determined whether the battery (not shown) is good or bad (step S3). When it is determined that the battery is sufficient, the process proceeds to step S4 to activate the blur amount detecting means 1. In step S5, photometry and distance measurement are performed, and in step S6, switch SW is used.
It is determined whether or not 3 is on (step S6).

When the switch SW3 is on, the flag is set to 1 in step S7, and then it is determined in step S8 whether or not the camera shake amount is less than or equal to a predetermined value B. When the value is not more than the predetermined value B, the lamp 3 is turned on in step S9, and the process proceeds to step S13. When it is larger than the predetermined value B, the lamp 3 blinks in step S12, and the process proceeds to step S13.

When it is determined in step S6 that the switch SW3 is off, the flag is set to 0 in step S10, and then it is determined whether or not the shutter speed obtained in step S5 is later than the predetermined value A ( Step S11). When it is later than the predetermined value A, the lamp 3 blinks in step S12, and the process proceeds to step S13. If it is faster than the predetermined value A, the lamp 3 is turned on in step S12A,
Move to 13.

In step S13, the photographing optical system L2 is driven to perform autofocus. In step S14,
It is determined whether the switch SW2 is on. Step S1
When it is determined that the switch SW2 is off in step 4, it is determined whether the switch SW1 is on (step S18).
C). When the switch SW1 is on, step S6
Return to. When the switch SW1 is off, the lamp 3 is turned off (step S24), and the process returns to step S2.

When it is determined in step S14 that the switch SW2 is on, the lamp 3 is turned off (step S1).
5). Next, it is determined whether or not a self-timer (not shown) is set (step S16). If the self-timer is set, the self-timer is started (step S17) and the time is up (step S1).
After waiting 8), the process proceeds to step S18A. In step S18A, it is determined whether or not the flag is 0, and when the flag is 0, the process proceeds to step S19A (FIG. 7).
In step S19A (FIG. 7), the blur correction lens group 5a
Is moved to the optical axis of the photographing optical system L1 to start photographing (step S20).

When it is determined in step S18A that the flag is not 0 (switch SW3 is on), blur correction is started (step S19) and then photographing is started (step S20). With the start of the blur correction in step S19, the blur correction unit 4 drives the drive system 5 to move the blur correction lens group 5a. In step S20, the exposure control unit 10 is instructed to control the diaphragm according to the output of the photometric unit 7 (photometric result). The exposure control means 10 drives the diaphragm member 11 to control the diaphragm according to the output (photometric result) of the photometric means 7, and a photograph is taken by this control (step S21). In step S22, the CPU circuit 2 instructs the blur correction unit 4 to stop the blur correction. The blur correction unit 4 stops driving the drive system 5 to stop the blur correction lens group 5a.
Stop moving. In step S23, since the photographing is finished, the film winding mechanism (not shown) is driven to wind the film to prepare for the next photographing, and then the program is ended.

As described above, in this embodiment, the self-return type external operation switch is provided as the shake correction execution switch, and the ON operation of this switch is accepted after the shutter release button is pressed halfway and after it is fully pressed. When the switch ON operation is accepted, the shake correction operation is started after the shutter release button is fully pressed.

When the shutter release button is pressed halfway,
After performing photometry and distance measurement, if the shutter speed is slower than the specified speed based on the photometry results, a camera shake warning is issued, and when the shake correction execution switch is turned on, the shake detection means is activated and the camera shake condition is detected. If the value exceeds the correctable range, a camera shake warning is issued.

Further, since the shake correction execution switch is provided on the opposite side of the shutter release button with the photographing lens interposed, the camera must be held by both hands when the shake correction execution switch is turned on. The camera shake that accompanies the operation stop is suppressed as much as possible. As a result, the following effects can be obtained.

The camera shake correction operation of a camera other than the TTL viewfinder can be performed only during the exposure operation. The conventional blur warning display can be shared. The photographer can hold the camera with both hands. Even when the shake correction is not executed, it is possible to issue a warning that the shake has occurred after the shutter speed measurement.

[0028]

As described above, according to the image blur correction camera of the present invention, the detection output of the image blur detection means is displayed on the display means when the blur correction execution signal generation means generates the execution signal. As a result, it is possible to display the suitability of shooting including the information on the image blur, thereby preventing useless shooting.

[Brief description of drawings]

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

FIG. 2 is a front view showing an embodiment of an image blur correction camera according to the present invention.

FIG. 3 is a rear view showing an embodiment of the image blur correction camera according to the present invention.

FIG. 4 is a front view showing an embodiment of an image blur correction camera according to the present invention.

FIG. 5 is a sectional view showing an embodiment of an image blur correction camera according to the present invention.

FIG. 6 is a flowchart showing an embodiment of an image blur correction camera according to the present invention.

FIG. 7 is a flowchart showing an embodiment of an image blur correction camera according to the present invention.

FIG. 8 is a front view showing the display in the viewfinder of the image blur correction camera according to the present invention.

[Explanation of symbols]

 1 Blurring amount detecting means 2 CPU circuit 3 Lamp 4 Blurring correcting means 5 Driving system 5a Blurring correcting lens group 6 Distance measuring means 7 Photometric means 8 Focusing control means 9 Driving system 10 Exposure control means 11 Aperture member 100 Release button 101 Switch button L1 Shooting optical system L2 Shooting optical system

Claims (3)

[Claims] 1. An image blur detection unit for detecting image blur, an image blur correction unit for correcting image blur, and an image blur correction execution signal generation unit for generating an execution signal for instructing the image blur correction unit to operate. And display means for displaying the image blur based on the detection output of the image blur detection means, wherein the display means operates when the blur correction execution signal generation means generates an execution signal. Characteristic image stabilization camera. 2. The image blur correction camera according to claim 1, wherein the display means is provided in a viewfinder field of the camera. 3. The image blur correction camera according to claim 1, wherein the display means is provided near a viewfinder window of the camera.