JPH07281238A - Camera with function for correcting camera shake - Google Patents

Abstract

PURPOSE:To prevent a data imprinting density from being insufficient by stabilizing a driving current in a light source for imprinting data. CONSTITUTION:This camera is equipped with camera-shake detecting means 3 and 4 detecting camera-shake, camera-shake correcting means 5, 6, 8, 9 and 13 correcting the camera-shake based on the output signals of the camera-shake detecting means 3 and 4 and a data recording means 54 recording the data on a photographic film, the camera-shake correcting means takes a camera- shake correcting action during the exposure of a shutter device and the data recording means 54 takes a recording action after the shutter exposure of the shutter device is completed and then, the camera-shake correcting means stops the camera-shake correcting action.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a camera having a camera shake correction function.

[0002]

2. Description of the Related Art In a camera having a shake correction function, a shake correction lens is shifted in a direction perpendicular to a lens optical axis to perform a correction operation in accordance with a shake detection signal from a shake detection device. . This blur correction operation (shift driving the correction lens perpendicularly to the optical axis) needs to be performed in a very short time during shutter exposure.

On the other hand, there is a camera having a data imprinting device from the past, and in the conventional camera having such a data imprinting device, a light source lamp or a row of LED dots is made to emit light after the exposure operation is completed. The data was imprinted on the shooting screen.

[0004]

If the blur correction operation described above is performed in a very short time, the rising area of the actuator will be used more frequently, but since the actuator drive current is large, correction is performed depending on the magnitude of the drive current. Performance will be affected. On the other hand, the brightness of the light source of the data imprinting device also depends on the magnitude of this drive current.

The shake correction operation cannot be ended at the same time as the exposure operation is completed, and the shake correction lens must be driven to the initial position. Therefore, a certain period of time is required even after the exposure operation is completed. Therefore, if the data imprinting operation is executed immediately after the shutter is closed, the fluctuation of the driving current of the shake correction driving actuator will be superimposed on the light source driving current of the data imprinting device, and the illuminance of the data light on the film surface will be inaccurate. There was a risk that the imprint density would be insufficient.

The present invention has been made in view of such a situation, and in a camera having a camera shake correction function, it is possible to stabilize the driving current of a light source for imprinting data so that the density of imprinting data is not insufficient. To aim.

[0007]

In order to achieve the above object, the present invention provides a blur detecting means for detecting camera shake, a blur correcting means for correcting blur based on an output signal of the blur detecting means, and an exposure time. The shutter correction unit includes a shutter unit for limiting and a data recording unit for recording data on a photographic film. The shake correction unit performs a shake correction operation during exposure of the shutter device, and the shake correction unit after the shutter exposure operation of the shutter device is completed. The data recording unit is configured to perform the recording operation after the shake correction operation is stopped.

[0008]

In the camera having the image stabilization function having the above-described structure, after the shake correction means of the shutter device has stopped the shake correction operation, that is, the shake correction operation (driving the shake correction lens to the initial position). (Including the operation), the data recording means performs the recording operation, so that the data imprinting light source drive current is not affected when the shake detection device is working and when it is not working. , The data imprinting light source drive current can be stabilized.

[0009]

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

FIG. 1 is a block connection diagram showing a first embodiment of a camera having an image stabilization function according to the present invention.

In FIG. 1, the taking lenses 11 and 12,
It is composed of four lenses 13 and 14. Among them, the lens 13 is a camera shake correction lens that can be driven in the X-axis (camera longitudinal direction) and Y-axis (camera lateral direction) directions for camera shake correction.

The CPU 1 is a one-chip microcomputer, which is a control device for controlling the entire sequence of the camera. The CPU 1 is assumed to have a counter function, a timer function for measuring time, an A / D conversion function, and the like.

The distance measuring circuit 2 is a circuit for measuring the distance to a subject. The photometric circuit 21 is a circuit for photometrically measuring the peripheral portion of the object field. The shake display unit 22 displays the camera shake state of the camera. The main switch 18 is a switch for starting the operation of the camera. The main switch 18 is a state switch having an ON position and an OFF position, and once the user sets the ON position to the ON position, the main switch 18 holds the ON position until it is returned to the OFF position again. The half-press switch 19 is a switch for starting preparation for shooting by pressing the shutter release button halfway. Release switch 2
A switch 0 is turned on by fully pressing the shutter release button. The shake correction control prohibition switch 24 is a switch for prohibiting shake correction control, and can be operated by the photographer. The non-volatile memory 23 is a writable and readable non-volatile memory (eg, E ² PROM).

The shake detection circuit 3 is designed to detect the amount of camera shake X
It is a circuit that detects the angular velocity in the axial direction. Shake detection circuit 4
Is a circuit for detecting the angular velocity in the Y-axis direction. The motor drive circuit 5 is a circuit that controls the motor 8 that drives the shake correction lens 13 in the X-axis direction. The motor drive circuit 6 is a circuit that controls a motor 9 that drives the shake correction lens 13 in the Y-axis direction. The motor drive circuit 7 is a circuit that controls the motor 10 that drives the focusing lens 14.

The lens position detection circuit 15 is a circuit for detecting the position (movement amount) of the shake correction lens 13 in the X-axis direction. The lens position detection circuit 16 is a circuit that detects the position (movement amount) of the shake correction lens 13 in the Y-axis direction. The lens position detection circuit 17 is a circuit that detects the position (movement amount) of the focusing lens 14 in the optical axis direction.

The blur detection circuit 3 and the blur detection circuit 4 are circuits for detecting camera shake, and the output value changes according to the angular velocity caused by the camera shake. CP
U1 indicates the output values of the blur detection circuit 3 and the blur detection circuit 4 as A
/ D conversion is performed to detect the angular velocity of camera shake.

The motor drive circuit 5 duty-drives the motor 8. The motor drive circuit 6 duty-drives the motor 9. The CPU 1 outputs a drive direction signal to the motor drive circuits 5 and 6 to instruct the drive direction of the motors 8 and 9. The CPU 1 also outputs a drive duty signal to the motor drive circuits 5 and 6 to instruct the drive speed of the motors 8 and 9. In accordance with these signals, the motor drive circuits 5 and 6 energize the motors 8 and 9 in a designated direction at an arbitrary duty to control the shake correction lens 13 at an arbitrary speed.

The CPU 1 calculates the distance measurement data obtained by the distance measurement circuit 2. The CPU 1 gives an instruction to the motor drive circuit 7 according to the calculation result. The motor drive circuit 7 is C
By energizing the motor 10 in the direction specified by PU1,
The focusing lens 14 is controlled at an arbitrary speed.

The rotation of the motor 8 is converted into a linear motion by a correction lens drive mechanical system (not shown), and drives the shake correction lens 13 in the X-axis direction. The rotation of the motor 9 is converted into a linear motion by a correction lens driving mechanical system (not shown),
The shake correction lens 13 is driven in the Y-axis direction. Motor 10
The rotation of the focusing lens drive mechanical system (not shown)
Is converted into a linear motion by the focusing lens 14
Are driven in the optical axis direction.

The lens position detection circuit 15 outputs a pulse according to the amount of movement of the shake correction lens 13 in the X-axis direction.
The lens position detection circuit 16 outputs a pulse according to the amount of movement of the shake correction lens 13 in the Y-axis direction. The CPU 1 reads the position and movement amount in the X-axis and Y-axis directions by counting these pulse numbers. Further, the CPU 1 calculates the moving speed in the X-axis and Y-axis directions by detecting the moving amount for a certain period of time. Lens position detection circuit 1
Reference numeral 7 outputs a pulse according to the amount of movement of the focusing lens 14 in the optical axis direction. The CPU 1 counts the number of pulses to obtain the focusing lens 14
Read the position and movement amount in the optical axis direction.

The non-volatile memory 23 is a non-volatile memory in which predetermined data necessary for photographing processing is written in advance. The CPU 1 reads predetermined data in the non-volatile memory 23 when necessary for performing a predetermined sequence.

Next, the operation of the CPU 1 will be described with reference to the flow charts shown in FIGS. 2, 3, 4, and 5.
In this embodiment, the distance measurement execution time of the distance measurement circuit 2 is 0 to 30.
0 ms, photometry execution time of photometry circuit 21 is 50 ms, driving time of focusing lens 14 is 100 ms, circuit stabilization time of blur detection circuits 3 and 4 is 300 ms, shock avoidance time at release is 50 ms, zero angular velocity detection time is 900 ms, The run-up control time for stabilizing the camera shake correction control is 20 ms.

FIG. 2 is a flowchart showing the main flow. The power has already been turned on and the main switch 18
Is already on, and the process starts from S200. First, in S201, the inside of the CPU 1 is initialized. Next, it goes around the loop of S202 and S203, and S202
Wait for the half-push switch 19 to turn on or to turn off the main switch 18 in S203. When the main switch 18 is off in S203, the process proceeds to S205 and ends the process. Then, it waits for the main switch 18 to be turned on again. When the main switch 18 is turned on, the process is restarted from S200. Half-press switch 19 in S202
When is turned on, the process proceeds to S204 to call the photographing processing routine.

3, 4, and 5 are flowcharts showing the photographing processing routine (S204).

When it is confirmed that the half-push switch 19 is turned on,
The process starts from S300 in FIG. First, in step S301, the blur detection circuit 3 and the blur detection circuit 4 are activated. S3
The blur detection circuit 3 and the blur detection circuit 4 started in 01
Continues to operate until it is stopped in S516. In step S302, the timer A (zero angular velocity detection time is 900 in this embodiment).
ms) is started, and the flag A is set to 0 in S303. Next, in step S304, photometry processing is executed, and in step S305, distance measurement processing is executed.

After that, in S306, the result of the photometry processing executed in S304 is subjected to AE calculation, and in S307, the FM calculation is executed using the result of the distance measurement processing executed in S305. In the next step S308, after waiting for the wait time of T1, the process proceeds to step S309. The wait time of T1 is necessary for ensuring the circuit stabilization time of the shake detection circuits 3 and 4. In the present embodiment, since the time obtained by subtracting the distance measurement time 0 to 300 ms and the photometry time 50 from the stabilization time 300 ms of the blur detection circuit is 0 to 250 ms, 250 ms is set as T1. S
In 309, the focusing lens 14 is driven in a predetermined driving direction according to the distance measurement value set in S305.

In next step S310, it is confirmed whether or not the shake correction control prohibiting switch 24 is turned on. If the shake correction control prohibiting switch 24 is turned on, the process proceeds to S311, the flag B is set to 1, and then, in S312, the display of the shake display device 22 is changed to 8 Hz blinking display and S401 in FIG.
Proceed to. This blinking display of 8 Hz is a display indicating that the shake correction control is not performed.

In step S310, the shake correction control inhibition switch 24
When it is confirmed that is turned off, the flag B is set to 0 in the next S313. In step S314, it is determined whether the output from the shake detection circuits 3 and 4, that is, the shake amount is smaller than a predetermined value C. If it is determined in S314 that the shake amount is smaller than the predetermined value C, the display of the shake display 22 is turned on in S315, and the process proceeds to S401 in FIG. Shake indicator 2
The lit display of 2 indicates that the detected shake amount is within the correctable range.

If it is determined in S314 that the shake amount is larger than the predetermined value C, the display of the shake indicator 22 is changed to 2 in S316.
Hz blinking is displayed and the process proceeds to S401 in FIG. The 2 Hz blinking display of the shake indicator 22 indicates that the detected shake amount is large and it is not known whether shake correction can be performed.

In step S401 of FIG. 4, the flag A is confirmed. If the flag A set in step S303 is 0, the process proceeds to step S402. When it is determined that the flag A is set to 1 in S401, the process proceeds to S404.

When it is confirmed in S402 that the timer A has timed out (when 900 ms has elapsed in the present embodiment for the zero angular velocity detection time), the flag A is set to 1 in S403 and then the process proceeds to S404. In S404, it is confirmed that the release switch 20 is on. If it is on, the process proceeds to S501 in FIG. If the release switch 20 is off in S404, it is confirmed in next S405 that the half-push switch 19 is on. S4
If it is confirmed that the half-push switch 19 is off in 05, S40
At 6, the shake detection circuits 3 and 4 are stopped. Then S
The flag A is confirmed in 407, and if it is 1, the process proceeds to S409, and if it is 0, the timer A is stopped in S408 and then the process proceeds to S409. In step S409, the display of the shake display is turned off, and then the processing returns from step S410 to the flowchart of FIG. In this case, shooting is not performed.

When it is confirmed in S405 that the half-push switch 19 is turned on, in the next S411, the shake correction control inhibition switch 2
Check whether 4 is on, and if it is on, S
In step 412, the flag B is reset to 1, and in step S413, the display of the shake display unit 22 is changed to 8 Hz blinking display and the process returns to step S401.

In step S411, the shake correction control inhibition switch 24
If it is confirmed whether or not is turned off, the flag B is reset to 0 in S414, and in the next S415, it is determined whether or not the output (the shake amount) from the shake detection circuits 3 and 4 is larger than the predetermined value C. Make a decision. If it is determined in S415 that the shake amount is smaller than the predetermined value C, in S416, the shake indicator 22
Is turned on and the process returns to S401. If it is determined in S415 that the shake amount is larger than the predetermined value C, S417
The display of the shake indicator 22 is changed to a blinking display of 2 Hz with S40.
Return to 1.

In S501 of FIG. 5, it is determined whether or not the self mode is set. In the self mode, the process proceeds to S506 after the self timer (for example, 10 seconds) has elapsed in S505. S50
When it is not 1 in the self mode, it is determined in next S502 whether or not it is the red eye mode. In the case of the red eye mode, pre-irradiation is performed for 1 second in S503, and then the process proceeds to S506. If the red-eye mode is not set in S502, a wait time of T2 (a shock avoidance time at the time of release, which is 50 ms in the present embodiment) is waited in S504, and then the process proceeds to S506.

In S506, S312, S315, S3
The display of the shake indicator 22 displayed in S16, S413, S416, or S417 is turned off, and the process proceeds to S507. S50
At 7, the state of flag A is confirmed, and if it is 1, then S5
Go to 09. If the determination in S507 is 0, the next S508
In step S302, the timer A started in S302 is waited until the time is up, and after a lapse of time, the process proceeds to S509. S
At 509, the center of the shake correction lens 13 is moved from the initial reset position to the center position of the optical axis. In S510, the state of the flag B is confirmed. When it is determined that the flag B is 1 in S510, the shake correction control prohibit mode is recognized, and the process proceeds to S513. S5
When it is determined that the flag B is 0 in 10, it is recognized as a mode for performing the shake correction control, and the camera shake correction process is started in the next S511. After starting the image stabilization process, T3 in S512.
Wait time (the run-up control time for stabilizing the camera shake correction control, which is 20 ms in this embodiment), and then proceeds to S513. In S513, the shutter starts to open.

The camera shake correction process starts from S511 before the shutter starts to open, and ends at S51 immediately after the shutter is completely closed.
Continue until 5. In S513, the AE obtained in S306
The EV value according to the calculated value is opened at a predetermined time. Thereafter, the shutter closing process is executed in S514, and the camera shake correction process is stopped in S515. Next, in S516, the blur detection circuits 3 and 4 are stopped. Next, the shake correction lens 13 is returned to the initial position in S517, and the focusing lens 14 is driven to a predetermined reset position in S518. Next, in S519, film winding is started, and a number or a character in a dot matrix is imprinted by the LED array 54a shown in FIG. 6 according to the film feeding signal (step S520). When the feeding signal for one frame is output in S521, the process proceeds to S522 and the film winding is stopped. Then, the process returns from S523 to the flowchart of FIG.

In addition to the half-press switch, the switch for preparing to start photographing is a touch sensor for detecting that a part of the photographer's body is touching, or an approach detection for detecting that the photographer is approaching the camera. A sensor or a line-of-sight sensor that detects the line of sight of the photographer may be used.

The blur detection circuit 3 and the blur detection circuit 4 started in S301 continue to operate until stopped in S516. That is, the shake detection circuit 3 and the shake detection circuit 4 do not stop even when the shake correction is prohibited. Therefore, it is not necessary to take the circuit stabilization time of the blur detection circuit 3 and the blur detection circuit 4 one by one. Therefore, even if the shake correction is prohibited once, without waiting for the circuit stabilization time of the shake detection circuit 3 and the shake detection circuit 4,
The shake can be corrected immediately.

7 and 8 are a flowchart and a perspective view showing a second embodiment of a camera having a camera shake correction function according to the present invention.

In this embodiment, the film 65 after the exposure operation is performed.
Data characters are formed on the transmissive liquid crystal element 62 (FIG. 8) before one frame is fed, and the imprinting lamp 61 is turned on from behind to imprint the data characters on the film surface. Also, S5
After closing the shutter of FIG. 14 (FIG. 7), blur correction is stopped in S515, blur detection is stopped in S516, the blur correction lens is returned to the reset position in S517, and data is imprinted in S521. Others are the same as those in the first embodiment, and the same components are designated by the same reference numerals and the duplicated description will be omitted.

In the present embodiment, the case where data such as date and time is imprinted with light is described as an example, but the present invention is not limited to this, and the date and time may be recorded by a photoelectric recording device or a magnetic recording device. The present invention can also be applied to the case of recording data such as time.

[0042]

As described above, according to the present invention, after the blur correction means after the shutter exposure operation of the shutter device has stopped the blur correction operation, that is, the blur correction operation (driving the blur correction lens to the initial position). Since the data recording means performs the recording operation after (including the operation), in a camera having a camera shake correction function, the drive current of the data recording light source is stabilized so that the density of the data recording is not insufficient. It becomes possible to do.

Further, since a large current does not flow at one time, the battery life is extended, and a power supply battery dedicated to the data recording means is not required, so that cost reduction and size reduction can be achieved.

[Brief description of drawings]

FIG. 1 is a block connection diagram showing a first embodiment of a camera having an image stabilization function according to the present invention.

FIG. 2 is a flowchart showing a first embodiment of a camera having a camera shake correction function according to the present invention.

FIG. 3 is a flowchart showing a first embodiment of a camera having a camera shake correction function according to the present invention.

FIG. 4 is a flowchart showing a first embodiment of a camera having a camera shake correction function according to the present invention.

FIG. 5 is a flowchart showing a first embodiment of a camera having a camera shake correction function according to the present invention.

FIG. 6 is a perspective view showing a first embodiment of a camera having a camera shake correction function according to the present invention.

FIG. 7 is a flowchart showing a second embodiment of a camera having a camera shake correction function according to the present invention.

FIG. 8 is a perspective view showing a second embodiment of a camera having a camera shake correction function according to the present invention.

[Explanation of symbols]

 1 CPU 2 Distance Measuring Circuit 3 Shake Detection Circuit 4 Shake Detection Circuit 5 Motor Drive Circuit 6 Motor Drive Circuit 7 Motor Drive Circuit 8 Motor 9 Motor 10 Motor 13 Correction Lens 14 Focusing Lens 15 Lens Position Detection Circuit 16 Lens Position Detection Circuit 17 Lens Position detection circuit 18 Main switch 19 Switch 20 Release switch 21 Photometric circuit 22 Display 23 Non-volatile memory 24 Correction control prohibition switch 54a LED array 61 Lamp 62 Transmissive liquid crystal element 65 Film

Claims (2)

[Claims] 1. A blur detecting means for detecting camera shake, a blur correcting means for compensating a blur based on an output signal of the blur detecting means, a shutter means for limiting an exposure time, and data for recording data on a photographic film. A recording means, wherein the shake correction means performs a shake correction operation during exposure of the shutter device, and the shake correction means stops the shake correction operation after the shutter exposure operation of the shutter device, A camera having a camera shake correction function, wherein a recording unit performs a recording operation. 2. A camera having a camera shake correction function according to claim 1, wherein the camera shake detection operation of the shake detection means is stopped before the data recording means performs a recording operation.