JPH0980574A - Image blur correcting camera - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent the malfunction of a control circuit, when a power supply capacity is decreased as well by preventing the unexpected exposures of plural images in multiple flashing, when control accuracy is reduced due to the deficiency of a power supply voltage. SOLUTION: This image blur correcting camera is equipped with a flushing device 134 capable of flashing plural times with a single operation, a shake detecting device 119 for detecting the image blur of the camera, image blur correcting mechanisms 122 and 125 correcting the image blur, an image blur controller 114 controlling the image blur correcting mechanisms 122 and 125, based on the signal of the shake detecting device 119 and a flash control circuit 138 for controlling the flashing device 134. The flash control circuit 138 inhibits or suppresses plural times of flash, while the image blur controller 114 controls the image blur correcting mechanisms 122 and 125.

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 Shake (camera shake, etc.) generated in a still camera, a video camera, etc. is detected by a sensor such as an angular velocity sensor, and a correction optical system is moved in a direction opposite to the detected shake direction to cause image blurring. A camera device for correction is known (Japanese Patent Laid-Open No. 2-183217).

FIG. A shows a block diagram of a blur correction circuit of a conventional camera device with interchangeable lenses. A battery 3 is provided inside the camera body 1 and supplies power to the inside of the camera, the taking lens and the like. The camera body 1 and the taking lens 2 are connected by electrical contacts 8, 9, 10, 11, and 12 for making an electrical connection. The electrical contact 8 is a contact for supplying power from the battery 3 in the body 1 to the taking lens 2 via the power supply control switch 6 which is a semiconductor switch. Electrical contact 9
Is a contact for feeding the output of the DC / DC converter 5 in the camera body 1 to the taking lens 2. The electrical contact 10 is a contact group for communicating between the CPU 4 in the camera body 1 and the master CPU 14 in the taking lens 2. The electrical contact 11 is a contact of a GND (ground) line connected to the cathode terminal of the battery 3 in the camera body 1. The electrical contact 12 is a GND line that is grounded to the metal object of the camera body 1.

The switches 7a and 7b are switches which are turned on by the first stroke and turned on by the second stroke of the release button of the camera, respectively. Switch 7a is ON
Then, the L level is input to the HAN terminal of the body CPU 4. When the switch 7b is turned on, the L level is input to the RLS terminal of the body CPU 4. Camera body 1
The CPU4, which controls the internal control of the camera, controls the DC / D in the camera body 1 by inputting the L level to the HAN terminal.
The C converter 5 is activated and controlled, and power is supplied to the master CPU 14 and the electrically rewritable non-volatile memory (EEPROM) 15 in the taking lens 2 through the contact 9. When the master CPU 14 outputs a power supply request signal for the electrical contact 8 to the CPU 4 in the camera body 1 via the electrical contact 10, the battery 3 in the camera body 1 causes the semiconductor switch 6 controlled by the CPU 4 and the electrical contact 8. Power is supplied to the DC / DC converter 17 in the taking lens 2 via the image pickup lens 2.

When the power source of the electrical contact 9 is supplied, the master CPU 14 activates the DC / DC converter 17. D
The C / DC converter 17 includes a constant voltage regulator 18,
Power is supplied to the slave CPU 20, the motor drivers 21 and 24. The constant voltage regulator 18 supplies power to the shake detection circuit and analog processing circuit block (analog circuit) 19. In the analog processing circuit 19, since the dynamic range of the signal component is wide, the power supply of the processing circuit must also have a low noise level. When the output of the DC / DC converter 17 is directly used, the noise level is not sufficiently low due to the characteristic that this power supply is a switching power supply. Therefore, the constant voltage regulator circuit 18
Is supplied to the power supply of the circuit that performs analog processing via.

The master CPU 14 monitors the voltage of the electrical contact 6 at the AN2 terminal 27. When the value of this voltage is below a predetermined value, a warning is issued or control is stopped. The resistor 13 is a low resistance inserted so that the potential difference with the contact 12 does not become large when the motors 22 and 25 rotate and a large current flows into the contact 11.

There are two switches 16a and 16b.
A bit setting switch for selecting the image blur correction control mode. When the switch 16a is ON, the L level is input to the D1 terminal of the CPU 14 in the lens. CPU1 in the lens when the switch 16b is ON
The L level is input to the D2 terminal of No. 4. With this setting, the mode is selected as follows. D1 D2 correction mode ―― ―――――――――――――――――――― L H Mode that performs correction operation only during exposure H L Mode that performs correction operation other than during exposure H H correction Mode that does not perform any operation

In the mode in which the correction operation is not performed, the shake amount detected by the analog circuit 19 is analog-processed and input to the master CPU 14. When the switch 7a in the camera body 1 is turned on while the image blur correction mode is set to a mode in which the correction operation is performed other than during the exposure (only the switch 16b is turned on), the master CPU 1
4 calculates the amount to drive the motors 22 and 25 based on the analog processed data, and transmits it to the slave CPU 20. Slave CPU 20 is MD21 and MD24
Output the amount to be driven to the motors 22 and 2
5 is driven. The motors 22 and 25 convert rotational movement into linear movement and drive a correction optical system (not shown). The deviation from the control amount is known by the feedback pulse from the position detection circuits 23 and 26 that detect the position of the correction optical system by the rotation of the motors 22 and 25, for example, the photo interrupter element.

The image blur correction mode is set to a mode in which the correction operation is performed only during exposure (switch 16a).
Switch 7b in the camera body 1 is ON.
In that case, the correction optical system is driven only during the exposure.

Interface IC in the camera body 1
Reference numeral 28 outputs a light emission start (synchro) signal to the strobe internal circuit 30 in response to an output signal from the CPU 4 in the body 1. The light emission of the strobe is monitored by the dimming circuit 29, and when the amount of emitted light reaches a predetermined value, a stop (STOP) signal for stopping the light emission of the strobe is issued to the strobe internal circuit 30. This signal causes the strobe to stop emitting light.

FIG. B is a block diagram showing the outline of the strobe light emission control circuit and its periphery. The DC / DC converter 32, which is powered by the battery 31, boosts the input voltage and charges the capacitor 33. The voltage detection circuit 36 monitors the charging voltage of the capacitor 33, and charges the capacitor 33 until it reaches a predetermined voltage, and stops charging when the voltage exceeds a predetermined value. When the voltage of the capacitor 33 falls below a predetermined value, the DC / DC converter 32 starts charging again.

In FIG. B, the IGBT 37 is held in a conductive state from the beginning. Even in this state, no current flows because the xenon tube 34 is not conductive. The xenon tube 34 is filled with xenon which is an inert gas,
When the control circuit 38 is excited by a certain voltage, the synchronization S
When W39 is turned on, a trigger signal which is a high voltage pulse is input by the trigger circuit 35 controlled by the control circuit 38, and a current flows through the xenon tube 34 and the IGBT 37 to emit light.

When the xenon tube 34 emits light, the light emission detection circuit 42 that monitors the voltage of the capacitor 33 detects the light emission and outputs an integration start signal to the dimming circuit 40 (see FIG. C (b)). . The dimming circuit 40 integrates the amount of light received by the photodiode 41, and when the value reaches a predetermined value or when a predetermined time elapses, the control circuit 38
A light emission stop signal is output to (see FIG. C (e)).
Receiving this, the control circuit 38 brings the IGBT 37 into a non-conducting state to stop light emission (see FIG. C (a)). In the control of continuously emitting light a plurality of times, the control from the light emission to the stop is performed a plurality of times continuously according to an instruction from the control circuit 38.

[0019]

However, when the frequency of the image blur is far from the frequency of the normal camera shake (several Hz to several tens Hz) when the power source capacity is deteriorated, the correction cannot catch up with the image blur. The image forming position on the film surface is also displaced during one exposure. In this state, when the strobe intermittent light emission is performed, the exposure is performed while changing the image forming position. In this state, the image is exposed on the film surface, resulting in exposure of a plurality of images that the photographer does not expect.

Further, when the power supply capacity decreases, the image blur correction drive and the strobe intermittent continuous light emission overlap with each other, resulting in an increase in power consumption and a decrease in the power supply voltage of the control circuit or the like to cause a system malfunction. Can happen.

The present invention has been made in view of the above problems, and prevents unexpected exposure of a plurality of images during multi-emission when the control accuracy is lowered due to insufficient power supply voltage, and also when the power supply capacity is lowered. The purpose is to prevent malfunction of the control circuit.

[0022]

In order to achieve this object, a first invention is a flash device (134) capable of emitting light a plurality of times at a time, and a shake detection for detecting an image blur of a camera. A device (119), an image blur correction mechanism (122, 125) for correcting image blur, and a shake detection device (11
9) image blur correction mechanism (122, 12)
5) and a flash control circuit (13) for controlling the image blur control device (114) and the flash device (134).
8), the flash control device is configured to prohibit a plurality of times of light emission while the image blur control device (114) controls the image blur correction mechanism (122, 125).

The second invention is a flash device (134) capable of emitting light a plurality of times at a time, a shake detection device (119) for detecting image blur of a camera, and an image blur correction for correcting image blur. The image blur correction mechanism (12) based on the signals of the mechanism (122, 125) and the shake detection device (119).
2, 125) for controlling the image blurring control device (114),
A flash control circuit (138) for controlling the flash device (134) is provided, and when the flash control device controls a plurality of flashes of the flash device (134), the image blur control device (114) uses the image blur correction mechanism. (122, 12
It is configured to prohibit the control of 5).

A third invention is a flash device (134) capable of performing high-speed synchronized light emission of a focal plane shutter, a shake detection device (119) for detecting image blur of a camera, and an image blur for correcting image blur. Correction mechanism (12
2, 125), an image blur control device (114) that controls the image blur correction mechanism (122, 125) based on a signal from the shake detection device (119), and a flash control circuit (controls a flash device (134). 138) and the image blur control device (114) has an image blur correction mechanism (122, 12).
During the control of 5), the flash control circuit (138) is configured to prohibit the flash device (134) from performing high-speed synchronized light emission.

A fourth invention is a flash device (134) capable of performing high-speed synchronized light emission of a focal plane shutter, a shake detection device (119) for detecting image blur of a camera, and an image blur for correcting image blur. Correction mechanism (12
2, 125), an image blur control device (114) that controls the image blur correction mechanism (122, 125) based on a signal from the shake detection device (119), and a flash control circuit (controls a flash device (134). 138) and the flash control circuit (138) includes a flash device (134).
When controlling the high-speed synchronized light emission of the
4) is configured to prohibit the control of the image blur correction mechanism (122, 125).

[0026]

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, the strobe internal circuit 130 is housed in the camera body 101.

In FIG. 1, a battery 103 is provided inside the camera body 101, and power is supplied to the inside of the camera and the taking lens. The camera body 101 and the taking lens 102 have electrical contacts 108, 109, 110 for electrical connection.
Connected by 111 and 112. Electrical contact 108
Is a contact for supplying power from the battery 103 in the body 1 to the taking lens 102 via the power supply control switch 106 which is a semiconductor switch. The electrical contact 109 is a contact for supplying the output of the DC / DC converter 105 in the camera body 101 to the taking lens 102. The electrical contacts 110 are a group of contacts for communicating between the CPU 104 in the camera body 101 and the master CPU 114 in the taking lens 102. The electrical contact 111 is the camera body 1
01 is a GND (ground) line connected to the cathode terminal of the battery 103. The electrical contact 112 is a GND line that is grounded to the metal object of the camera body 101.

Switches 107a and 107b
Is a switch that is turned on by the first stroke and turned on by the second stroke of the release button of the camera. When the switch 107a is turned on, the body CPU 10
The L level is input to the HAN terminal of No. 4. Switch 1
When 07b is turned on, the L level is input to the RLS terminal of the body CPU 104. The CPU 104, which controls the main control in the camera body 101, receives DC / DC in the camera body 101 by inputting the L level to the HAN terminal.
The DC converter 105 is activated and controlled, and the master CPU 114 and the electrically rewritable non-volatile memory (EEPROM) 11 in the photographing lens 102 are controlled via the contacts 109.
Power to 5.

The master CPU 114 has an electrical contact 108.
When the power supply request signal is output to the CPU 104 in the camera body 101 via the electrical contact 110, the camera body 1
Power is supplied to the DC / DC converter 117 in the taking lens 102 from the battery 103 in 01 via the semiconductor switch 106 and the electrical contact 108 controlled by the CPU 104. When the power of the electrical contact 109 is supplied, the master CPU 1
14 activates the DC / DC converter 117. DC /
The DC converter 117 includes a constant voltage regulator 118, a slave CPU 120 and motor drivers 121 and 1
Power 24 control circuits. Constant voltage regulator 118
Supplies power to the shake detection circuit and the analog processing circuit 119. Since the analog processing circuit 119 has a large dynamic range of signal components, its power supply must also have a low noise level. DC / DC converter 117
When the output of is used directly, the noise level is not sufficiently low due to the characteristic that this power supply is a switching power supply. Therefore, the voltage is supplied to the power supply of the circuit that performs analog processing via the constant voltage regulator circuit 118.

The master CPU 114 uses the AN2 terminal 12
7, the voltage of the electrical contact 106 is monitored. When the value of this voltage is lower than a predetermined value, a warning is issued or control is stopped. The resistor 113 is a low resistance inserted so that the potential difference with the contact 112 does not become large when the motors 122 and 125 rotate and a large current flows into the contact 111.

Switch 116a and switch 116b
Is a 2-bit setting switch for selecting the image blur correction control mode. When the switch 116a is ON, the L level is input to the D1 terminal of the CPU 114 in the lens. When the switch 116b is ON, the L level is input to the D2 terminal of the CPU 114 in the lens. With this setting, the mode is selected as follows. D1 D2 correction mode ----------------------------------- L H Mode for performing correction operation only during exposure ( VR1 mode) H L Mode for performing correction operation during and outside exposure (VR2 mode) H H Mode for not performing correction operation (VR0 mode)

The shake amount detected by the analog circuit 119 is analog-processed and input to the master CPU 114.

A state in which the image blur correction mode is set to a mode for performing a correction operation other than during exposure (switch 1
16b only) and the switch 107a in the camera body 101 is turned on, the master CPU 114 determines the motors 122 and 1 based on the analog processed data.
The amount to drive 25 is calculated and transmitted to the slave CPU 120. The slave CPU 120 has MD121 and M
The amount to be driven is output to D124, and the motor 12
Drive 2 and 125. Motors 122 and 125
Converts a rotational movement into a linear movement and drives a correction optical system (not shown). The master CPU 114 uses the motor 122
The deviation from the control amount is known by the feedback pulse from the position detection circuits 123 and 126 (for example, a position detection element such as a photo interrupter) that detects the position of the correction optical system due to the rotation of the rotations of 125 and 125.

A state in which the image blur correction mode is set to a mode in which the correction operation is performed only during exposure (switch 116).
Only a is ON), and switch 10 in camera body 101
When 7b is turned on, the correction optical system is driven only during exposure.

Interface 12 in camera body 1
8 starts light emission (synchronization) to the strobe internal circuit 130 by an output signal from the CPU 104 in the body 1.
Output a signal. When the strobe emits light in response to this signal, when the light emission amount value monitored by the dimming circuit 129 reaches a predetermined value, a stop (STOP) signal for stopping the strobe emission is issued. This signal causes the strobe to stop emitting light.

FIG. 2 is a block diagram showing the outline of the strobe light emission control circuit. The DC / DC converter 132 that is powered by the battery 103 boosts the input voltage,
The capacitor 133 is charged. The voltage detection circuit 136
The charging voltage of the capacitor 133 is monitored, and the capacitor 133 is charged until it reaches a predetermined voltage, and when the voltage exceeds a predetermined value, the charging is stopped. DC when the voltage of the capacitor 133 falls below a predetermined value
The / DC converter 132 starts charging again.

In FIG. 2, the IGBT 137 is held in a conductive state from the beginning. Even in this state, no current flows because the xenon tube 134 is not conductive. The xenon tube 134 is filled with xenon which is an inert gas, and when the sync SW 139 is turned on to the control circuit 138 while being excited by a certain voltage, a high voltage pulse is generated by the trigger circuit 135 controlled by the control circuit 138. Trigger signal is input, xenon tube 134 and IGB
A current flows to T137 to emit light.

When the xenon tube 134 emits light, the light emission detection circuit 42 that monitors the voltage of the capacitor 133 detects that it has emitted light and outputs an integration start signal to the dimming circuit 40 (see FIG. 3A). ). Light control circuit 40
Integrates the amount of light received by the photodiode 41 (see FIG. 3D) and outputs a light emission stop signal to the control circuit 138 when the value reaches a predetermined value or when a predetermined time elapses. (See FIG. 3 (e)). Receiving this, the control circuit 138 brings the IGBT 137 into a non-conducting state and stops light emission. In the control of continuously emitting light a plurality of times, the control from the light emission to the stop is performed according to an instruction from the control circuit 138.
The state of the mode at this time is shown below. Flash mode Single Multi −−−−− −−−−−−−−−−−−−− Control state Single flash Continuous intermittent flash Note that continuous intermittent flash is stroboscopic (stop motion) shooting and FP flash (focal plane). High-speed synchronized flash emission of the shutter), continuous red-eye reduction continuous emission, etc. are shown.

Control is performed as follows by comparing the voltage (AN2) of the power supply line of the electrical contact 108 under a predetermined condition and the predetermined value (BC) monitored by the CPU 114 in the photographing lens 102. . D1 D2 light emission mode B. C. Control −−−−−−−−−−−−−−−−−−−−−−−−−−−−−− L H Single AN2 ≧ B. C. VR1, Single L H Single AN2 <B. C. VR1, Single L H Multi AN2 ≧ B. C. VR1, Multi L H Multi AN2 <B. C. VR1, Single or VR0, Multi HL Single AN2 ≧ B. C. VR2, Single HL Single AN2 <B. C. VR1, Single HL Multi AN2 ≧ B. C. VR2, Multi HL Multi AN2 <B. C. VR2 (VR1), Single or VR0, Multi H H Single AN2 ≧ B. C. VR0, Single H H Single AN2 <B. C. VR0, Single H H Multi AN2 ≧ B. C. VR0, Multi H H Multi AN2 <B. C. VR0, Single

In the present invention, what is called FP light emission is light emission for performing high-speed synchronized photographing of the focal plane shutter, and in addition to the method of continuous light emission in a pulsed manner, the light emission time is long. It also includes a single emission method.

[0065]

As described above, according to the image blur correction camera of the present invention, it is possible to prevent an unexpected exposure of a plurality of multi-emission images during the blur correction control. Alternatively, if the shake correction control is prohibited during multi-emission, malfunction of the control circuit can be prevented. Therefore, when the flash device and the shake correction mechanism are driven by the electric power supplied from the power supply of the camera, it is possible to take a picture even if the capacity of the power supply is temporarily lowered.

[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 block connection diagram showing an embodiment of an image blur correction camera according to the present invention.

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

FIG. 4 is a block connection diagram showing an example of a conventional image blur correction camera.

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

FIG. 6 is a waveform diagram showing an example of a conventional image blur correction camera.

[Explanation of symbols]

 Reference numeral 101 camera body 102 photographing lens 103 battery 104 CPU 105 DC / DC converter 106 power supply switch 107 half-press / release switch 114 master CPU 115 EEPROM 116 correction mode setting switch 117 lens DC / DC converter 118 constant voltage regulator 119 analog processing circuit 120 Slave CPU 121 Motor driver 122 Motor 123 Motor rotation detection circuit 124 Motor driver 125 Motor 126 Motor rotation detection circuit 127 Battery check 128 Interface IC 129 Strobe dimming control circuit 130 Strobe internal circuit 132 DC / DC converter 133 Capacitor 134 Xenon tube 135 Trigger Circuit 136 Voltage detection circuit 137 IGBT 13 Trigger control circuit 139 synchro switch 140 dimmer circuit 141 receiving element 142 emitting detection circuit

Claims (4)

[Claims] 1. A flash device capable of emitting light a plurality of times at a time, a shake detection device for detecting an image blur of a camera, an image blur correction mechanism for correcting the image blur, and a shake detection device of the shake detection device. An image blur control device that controls the image blur correction mechanism based on a signal, and a flash control circuit that controls the flash device, and while the image blur control device controls the image blur correction mechanism,
The image stabilization camera, wherein the flash control device prohibits the plurality of flashes. 2. A flash device capable of emitting light a plurality of times at a time, a shake detection device for detecting image shake of a camera, an image shake correction mechanism for correcting the image shake, and a shake detection device for the shake detection device. An image blur control device that controls the image blur correction mechanism based on a signal, and a flash control circuit that controls the flash device. When the flash control device controls the plurality of flashes of the flash device, The image blur correction camera is characterized in that the image blur control device prohibits control of an image blur correction mechanism. 3. A flash device capable of performing high-speed synchronized light emission of a focal plane shutter, a shake detection device for detecting image shake of a camera, an image shake correction mechanism for correcting the image shake, and the shake detection device. An image blur control device that controls the image blur correction mechanism based on a signal of, and a flash control circuit that controls the flash device, and while the image blur control device controls the image blur correction mechanism,
The image blur correction camera, wherein the flash control circuit prohibits the flash device from performing the high-speed synchronized light emission. 4. A flash device capable of performing high-speed synchronized light emission of a focal plane shutter, a shake detection device for detecting image shake of a camera, an image shake correction mechanism for correcting the image shake, and the shake detection device. An image blur control device that controls the image blur correction mechanism based on a signal of, and a flash control circuit that controls the flash device. When the flash control circuit controls the high-speed synchronized light emission of the flash device, The image blur correction camera is characterized in that the image blur control device prohibits control of the image blur correction mechanism.