WO2005121890A1 - シャッタ用アクチュエータ駆動回路及びシャッタ用アクチュエータ装置 - Google Patents
シャッタ用アクチュエータ駆動回路及びシャッタ用アクチュエータ装置 Download PDFInfo
- Publication number
- WO2005121890A1 WO2005121890A1 PCT/JP2005/010562 JP2005010562W WO2005121890A1 WO 2005121890 A1 WO2005121890 A1 WO 2005121890A1 JP 2005010562 W JP2005010562 W JP 2005010562W WO 2005121890 A1 WO2005121890 A1 WO 2005121890A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- coil current
- voltage
- actuator
- shirt
- shutter
- Prior art date
Links
Classifications
-
- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
- G03B9/00—Exposure-making shutters; Diaphragms
- G03B9/08—Shutters
-
- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
- G03B7/00—Control of exposure by setting shutters, diaphragms or filters, separately or conjointly
- G03B7/08—Control effected solely on the basis of the response, to the intensity of the light received by the camera, of a built-in light-sensitive device
- G03B7/081—Analogue circuits
- G03B7/083—Analogue circuits for control of exposure time
Definitions
- the present invention relates to an actuator drive circuit for a shirt that drives an actuator for a shirt in a digital camera or the like, and an actuator device for a shirt using the same.
- the shutter actuator unit includes a shutter actuator drive circuit 101, a shutter actuator actuator 8 driven by a shirt actuator drive circuit 101 to operate a shirt (not shown), and a coil of the shutter actuator 8 A coil current detection voltage V which detects the current I and corresponds to the value of the coil current I
- the shutter actuator drive circuit 101 includes a tuner diode 131, a constant current source 132 connected at both ends to a Zener diode 131 and an internal power supply voltage V, and a Zenerda.
- resistors 133 and 134 provided in series between the connection point of diode 131 and constant current source 132 and the ground potential, and a capacitor 135 provided in parallel with resistor 134.
- an NPN bipolar transistor 136 is connected with the collector connected to the connection point (node N) of the resistors 133 and 134, the start signal is inputted to the base from the start signal input terminal ST, and the emitter is grounded.
- the voltage at node N is input to the noninverting input terminal, the coil current detection voltage V from the coil current detection terminal DET is input to the inverting input terminal, and the difference is amplified and output.
- the output voltage of the coil current control amplifier 115 is input to the coil current control amplifier 115 and the base, the emitter is connected to the coil current detection terminal DET, and the collector is the other end of the shutter actuator 8 via the output terminal OU T2. And an NPN bipolar transistor 119 connected thereto.
- the resistors 133 and 134 and the capacitor 135 constitute a CR integrator. Also, the power supply voltage V for driving the actuator is as it is through the output terminal OUT1.
- the shutter actuator drive circuit 101 operates as follows.
- the current of the constant current source 132 flows into the CR integrator composed of the resistors 133 and 134 and the capacitor 135.
- the voltage of the node N is gradually raised by this CR integrator, and the constant voltage generated by the receiver diode 131 is raised to a voltage divided by the resistors 133 and 134 to maintain the voltage.
- the coil current detection voltage V follows the voltage at node N
- the waveform A is a case where the actuator drive power supply voltage V is maximum. Also, the waves
- Type B is the case where the actuator drive power supply voltage V is minimum.
- Data drive circuit 101 increases the coil current I slightly later than waveform B, and
- the above time is set to the supply voltage V of the actuator driver.
- Patent Document 1 Japanese Unexamined Patent Application Publication No. 2003-043554
- the power supply voltage V for driving the actuator varies according to the degree of charging of the rechargeable battery, but the above-mentioned actuator drive circuit 101 for shirts is used.
- the coil current I reaches its upper limit value I.
- a shirt including the time required for the coil current I to reach its upper limit value I It is possible to make the time required for the operation of the motor, and also the shirt speed, to be unaffected by fluctuations in the power supply voltage V for driving the actuator.
- the shutter actuator actuator device using the shutter actuator driver circuit 101 equipped with the CR integration circuit is, practically, the coil current I
- the shutter actuator drive circuit 101 When the shutter actuator drive circuit 101 is integrated on a semiconductor integrated device, part or all of the CR integration circuit is externally attached, so that the semiconductor integrated device and the printed circuit board on which the semiconductor integrated device is mounted also become large. .
- the present invention has been made in view of the above-described reasons, and the object of the present invention is to vary the time required for the coil current to reach its upper limit value without using a CR integration circuit. It is an object of the present invention to provide an actuator drive circuit for a shirt capable of operating the shutter actuator more accurately with reduced accuracy, and an shutter actuator apparatus using the same.
- an actuator driver circuit for a shirt responds to an output of a counter that starts counting a divided clock obtained by dividing a reference clock according to a start signal.
- the D / A converter outputs a conversion voltage that gradually increases or decreases stepwise, and immediately after startup, the coil current detection voltage corresponding to the value of the coil current of the shutter actuator and the conversion voltage of the DZA converter After the converted voltage of the D / A converter matches the coil current limiting reference voltage corresponding to the upper limit value of the coil current, the coil current detection voltage and the coil current limiting reference voltage are compared, and A coil current control amplifier that outputs a voltage obtained by amplifying a difference, and a drive current output circuit that outputs a drive current of a shutter actuator according to the amplified output voltage of the coil current control amplifier Including the.
- the coil current control amplifier of the shutter actuator drive circuit is supplied with a reference current detection voltage, a reference voltage for coil current limitation and a conversion voltage of a D / A converter, and the reference voltage for coil current limitation and D / A converter conversion voltage and either Compare with the current detection voltage.
- the coil current control amplifier compares the coil current detection voltage with the converted voltage of the DZA converter.
- the shutter actuator drive circuit further includes a division ratio selection circuit for selecting a division ratio of the division clock input to the counter.
- the shutter actuator apparatus is driven by the shutter actuator drive circuit described in any of the above, and is driven by the shirt actuator actuator drive circuit to operate the shirt, and the coil current of the shirt actuator.
- a coil current detection element that outputs a coil current detection voltage to a shutter actuator drive circuit.
- the coil current has its upper limit value. It is possible to operate the shutter actuator with high accuracy by reducing the fluctuation of the time required to reach the point, and thus the power S can be operated with high accuracy.
- FIG. 1 is a view for explaining an shutter actuator apparatus according to an embodiment of the present invention.
- FIG. 2 A waveform diagram for explaining the operation of the shutter actuator drive circuit 1.
- FIG. 3 is a view for explaining a shutter actuator device according to another embodiment of the present invention.
- FIG. 4 is a view for explaining a conventional shutter actuator actuator device.
- the coil current I has its upper limit value I along with the fluctuation of the power supply voltage V for driving the actuator.
- FIG. 1 is a view for explaining a shutter actuator device according to an embodiment of the present invention.
- an actuator device for a shirt is driven by shutter actuator drive circuit 1 and shutter actuator drive circuit 1 to be a shirt (not shown). Detects the coil current I of the shutter actuator 8 for operating the motor and the coil current I of the shutter actuator 8 corresponding to the value of the coil current I.
- the coil current detection element 9 is a resistor.
- the shutter actuator includes a plunger for operating the shirt in place of the motor.
- the shutter actuator drive circuit 1 has three input terminals, ie, a clock input terminal CLK, a start signal input terminal ST, and a divided signal input terminal DI, and two output terminals OU Tl and OUT 2 And the coil current detection terminal DET described above.
- the three input terminals CLK, ST and DI are connected to a controller (not shown) such as one or more microcomputers, and from this controller, a reference clock, an activation signal and a divided signal are respectively transmitted. Is input.
- the reference clock input to the clock input terminal CLK is generated by an oscillating circuit such as a piezoelectric vibrator in the controller and used as a system clock.
- the two output terminals OUT1 and OUT2 are connected to the shutter actuator 8, and output drive current to the shirt actuator 8.
- the clock input terminal CLK is connected to a divider circuit 11, which divides the reference clock and outputs a divided clock.
- the counter 12 is connected to the subsequent stage of the divider circuit 11 and the start signal input terminal ST, and the counter 12 starts counting the divided clock by the start signal from the start signal input terminal ST.
- a DZA converter (DAC) 13 is connected to the subsequent stage of the counter 12, and the DZA converter 13 outputs a conversion voltage V that increases in a step-like manner corresponding to the output of the counter 12. D / A
- One noninverting input terminal of the coil current control amplifier 15 is connected to the subsequent stage of the converter 13.
- the coil current control amplifier 15 has two non-inverting input terminals and one inverting input terminal, and the coil current limiting reference voltage generator 14 is connected to the other non-inverting input terminal. Connected The coil current detection terminal DET is connected to the inverting input terminal. The reference current generator 14 for limiting current is used to control the coil current corresponding to the upper limit value I of the coil current I.
- the limiting reference voltage V and coil current detection voltage V are input to the inverting input terminal.
- coil current control amplifier 15 generates coil current limiting reference voltage V.sub.
- a drive current output circuit 16 is connected to the subsequent stage of the coil current control amplifier 15.
- the drive current output circuit 16 outputs a drive current for driving the shutter actuator 8 according to the amplified output voltage of the coil current control amplifier 15 from the output terminals OUT1 and OUT2.
- the shutter actuator drive circuit 1 connects the division ratio selection circuit 17 to the division signal input terminal DI.
- the division ratio selection circuit 17 selects the division ratio of the divided clock output from the division circuit 11.
- the above-described drive current output circuit 16 mainly includes an NPN bipolar transistor 19. That is, the collector is connected in series in the following order: power supply voltage V for driving the actuator, output terminal UT UT1, actuator 8 for shirt, and output terminal OUT2.
- the drive current output circuit 16 is controlled by the amplified output voltage of the coil current control amplifier 15 input to the base to control the drive current, that is, the coil current I,
- waveform C has a coil current I of shutter actuator 8 after the start signal is input to start signal input terminal ST and actuator driver circuit 1 for shutter is started. It shows.
- the waveform D is also obtained when the division ratio of the divided clock is twice that of the waveform C.
- waveforms A and B shown by the broken lines are the same as the waveforms A and B shown in FIG. 5, ie, the D / A converter 13 which outputs the conversion voltage V which gradually increases after start-up.
- Waveform A is the actuator voltage when the supply voltage V for driving the actuator is the maximum.
- the counter 12 Before the shutter driver actuator drive circuit 1 starts up, that is, before the start signal is input to the start signal input terminal ST, the counter 12 is in the initial state, and the converted voltage V of the D / A converter 13 is 0. It is.
- D / A converter 13 converts conversion voltage V which gradually increases in a step-like manner corresponding to the output of counter 12.
- coil current control amplifier 15 converts the converted voltage V power S coinole
- coil current detection voltage V follows conversion voltage V and increases.
- the coil current I increases stepwise as shown by the waveform C.
- the conversion voltage V of DZA converter 13 further increases, and the reference voltage V for coil current limitation
- the current flowing through the coil current detection element 9, that is, the coil current I of the shutter actuator 8, maintains the upper limit value I.
- the time required to do so varies with the fluctuation of the actuator drive power supply voltage V, as shown by the waveforms A and B.
- the actuator driver circuit 1 for this shirt has a waveform C.
- waveform C is the supply voltage for driving the actuator.
- the rate of increase of the conversion voltage V of D / A converter 13 is the divided clock output from divider circuit 11
- the division ratio of is adjusted as needed by selecting the division ratio of. That is, for example, when the division ratio is changed so that the period of the divided clock is twice that of the waveform C, the increase rate of the coil current I is reduced to 1/2 as shown in the waveform D.
- the division ratio is 1, the reference clock
- Taka S divided clock what is input to the counter 12 is a reference clock.
- this reference clock is generated by an oscillating circuit such as a piezoelectric vibrator, the reference clock is input with little change in accuracy due to factors such as temperature accuracy and deterioration with time. . Therefore, it takes time for the coil current I to reach its upper limit value I
- the shutter actuator can be operated with high accuracy, which is not influenced by the fluctuation of the power supply voltage for driving the actuator and is also less influenced by factors such as temperature and aging.
- the shirt can be operated with high accuracy. .
- FIG. 3 is a diagram illustrating a shutter actuator device according to another embodiment of the present invention.
- the shutter actuator device according to another embodiment of the present invention includes a shirt actuator drive circuit 2 in place of the shirt actuator drive circuit 1.
- the shutter actuator drive circuit 2 includes a counter 22 and a coil current control amplifier 25 in place of the counter 12 and the coil current control amplifier 15 in the shutter actuator drive circuit 1.
- this counter 22 matches the value (digital value) corresponding to the reference voltage V for coil current limitation, the converted voltage V of the D / A converter 13
- Control amplifier 25 inputs coil current detection voltage V and conversion voltage V and compares them
- the coil current control amplifier 25 compares the coil current detection voltage V with the conversion voltage V immediately after startup, and the conversion voltage V is a reference voltage for coil current restriction.
- the shutter actuator drive circuit 2 does not require the coil current limiting reference voltage generator 14 for generating the coil current limiting reference voltage V, which is an analog value.
- the circuit scale can be reduced.
- the coil current detection element 9 is provided on the ground potential side. This is applied to the actuator drive power supply voltage V side. It is also possible to provide. In this case, the shirt
- the NPN bipolar transistor 19 is a PNP bipolar transistor, and the D / A converter 13 outputs a gradually decreasing voltage after start-up.
- the drive current output circuit 16 drives the shutter actuator 8 in one direction so as to close the shirt. It is also possible to drive the shutter actuator 8 in two directions so as to open.
- the divided signal input terminal DI and the division ratio selection circuit 17 can be omitted.
- the NPN bipolar transistor can be replaced by an NMOS transistor, and the PNP bipolar transistor can be replaced by a PMOS transistor.
- the shutter actuator drive circuit and the shutter actuator device according to the present invention can be applied to digital cameras and the like.
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Shutters For Cameras (AREA)
- Control Of Direct Current Motors (AREA)
Abstract
Description
Claims
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US11/628,786 US7654756B2 (en) | 2004-06-14 | 2005-06-09 | Actuator drive circuit and actuator device |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2004176239A JP4416577B2 (ja) | 2004-06-14 | 2004-06-14 | シャッタ用アクチュエータ駆動回路及びシャッタ用アクチュエータ装置 |
JP2004-176239 | 2004-06-14 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2005121890A1 true WO2005121890A1 (ja) | 2005-12-22 |
Family
ID=35503229
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/JP2005/010562 WO2005121890A1 (ja) | 2004-06-14 | 2005-06-09 | シャッタ用アクチュエータ駆動回路及びシャッタ用アクチュエータ装置 |
Country Status (5)
Country | Link |
---|---|
US (1) | US7654756B2 (ja) |
JP (1) | JP4416577B2 (ja) |
CN (1) | CN100476563C (ja) |
TW (1) | TW200604722A (ja) |
WO (1) | WO2005121890A1 (ja) |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN102522940A (zh) * | 2011-12-29 | 2012-06-27 | 中国科学院长春光学精密机械与物理研究所 | 一种一周离合制动器的驱动保护控制电路 |
KR101843277B1 (ko) * | 2016-08-11 | 2018-05-14 | 삼성전기주식회사 | 보이스 코일 모터의 액추에이터 구동장치 및 구동방법 |
Citations (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS59116633A (ja) * | 1982-12-23 | 1984-07-05 | Copal Co Ltd | カメラ用の電磁シヤツタ |
JPS6146708U (ja) * | 1984-08-30 | 1986-03-28 | キヤノン株式会社 | カメラ用電磁石の駆動装置 |
JPS63146416A (ja) * | 1986-12-10 | 1988-06-18 | Konica Corp | 電磁駆動装置の駆動方法 |
JPH02262630A (ja) * | 1989-04-03 | 1990-10-25 | Olympus Optical Co Ltd | カメラにおけるモータ制御装置 |
JPH0641398U (ja) * | 1992-10-27 | 1994-05-31 | 株式会社コパル | 温度補正付カメラモータ駆動電流設定回路 |
JP2567230B2 (ja) * | 1986-12-15 | 1996-12-25 | セイコープレシジョン株式会社 | プログラムシャッタ |
JP2608705B2 (ja) * | 1986-01-13 | 1997-05-14 | セイコープレシジョン株式会社 | カメラ用シャッタ駆動モータの速度制御装置 |
JP2001033845A (ja) * | 1999-07-22 | 2001-02-09 | Nidec Copal Corp | シャッタ駆動制御装置 |
JP2003043554A (ja) * | 2001-07-27 | 2003-02-13 | Sanyo Electric Co Ltd | デジタルカメラのシャッター駆動回路 |
JP2003235293A (ja) * | 2002-02-07 | 2003-08-22 | Omron Corp | モータ制御装置 |
Family Cites Families (7)
Publication number | Priority date | Publication date | Assignee | Title |
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DE2149106C3 (de) * | 1971-09-28 | 1975-06-26 | Siemens Ag, 1000 Berlin Und 8000 Muenchen | Steuer- und Regeleinrichtung für den Linsenstrom von Elektronenmikroskopen |
US4423934A (en) * | 1982-04-02 | 1984-01-03 | Eastman Kodak Company | Photographic camera with digital controller and method of manufacture |
JPS6146708A (ja) | 1984-08-14 | 1986-03-07 | Honda Motor Co Ltd | サスペンシヨン制御装置 |
GB2185586B (en) | 1986-01-13 | 1989-11-22 | Seikosha Kk | Shutter control device for a camera |
US5262280A (en) | 1992-04-02 | 1993-11-16 | Shipley Company Inc. | Radiation sensitive compositions |
JPH10148858A (ja) * | 1996-11-19 | 1998-06-02 | Canon Inc | 防振制御装置 |
JP3893290B2 (ja) * | 2002-01-09 | 2007-03-14 | キヤノン株式会社 | コンデンサ充電装置およびカメラのストロボ充電装置 |
-
2004
- 2004-06-14 JP JP2004176239A patent/JP4416577B2/ja not_active Expired - Fee Related
-
2005
- 2005-06-09 CN CNB2005800192782A patent/CN100476563C/zh not_active Expired - Fee Related
- 2005-06-09 WO PCT/JP2005/010562 patent/WO2005121890A1/ja active Application Filing
- 2005-06-09 US US11/628,786 patent/US7654756B2/en not_active Expired - Fee Related
- 2005-06-14 TW TW094119715A patent/TW200604722A/zh not_active IP Right Cessation
Patent Citations (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS59116633A (ja) * | 1982-12-23 | 1984-07-05 | Copal Co Ltd | カメラ用の電磁シヤツタ |
JPS6146708U (ja) * | 1984-08-30 | 1986-03-28 | キヤノン株式会社 | カメラ用電磁石の駆動装置 |
JP2608705B2 (ja) * | 1986-01-13 | 1997-05-14 | セイコープレシジョン株式会社 | カメラ用シャッタ駆動モータの速度制御装置 |
JPS63146416A (ja) * | 1986-12-10 | 1988-06-18 | Konica Corp | 電磁駆動装置の駆動方法 |
JP2567230B2 (ja) * | 1986-12-15 | 1996-12-25 | セイコープレシジョン株式会社 | プログラムシャッタ |
JPH02262630A (ja) * | 1989-04-03 | 1990-10-25 | Olympus Optical Co Ltd | カメラにおけるモータ制御装置 |
JPH0641398U (ja) * | 1992-10-27 | 1994-05-31 | 株式会社コパル | 温度補正付カメラモータ駆動電流設定回路 |
JP2001033845A (ja) * | 1999-07-22 | 2001-02-09 | Nidec Copal Corp | シャッタ駆動制御装置 |
JP2003043554A (ja) * | 2001-07-27 | 2003-02-13 | Sanyo Electric Co Ltd | デジタルカメラのシャッター駆動回路 |
JP2003235293A (ja) * | 2002-02-07 | 2003-08-22 | Omron Corp | モータ制御装置 |
Also Published As
Publication number | Publication date |
---|---|
US7654756B2 (en) | 2010-02-02 |
CN1969229A (zh) | 2007-05-23 |
US20080031616A1 (en) | 2008-02-07 |
TW200604722A (en) | 2006-02-01 |
CN100476563C (zh) | 2009-04-08 |
TWI348589B (ja) | 2011-09-11 |
JP2005352430A (ja) | 2005-12-22 |
JP4416577B2 (ja) | 2010-02-17 |
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