JP3413289B2 - Blur signal processing module - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a shake detecting device for detecting a shake state of a camera or the like, and more particularly to a shake signal processing provided on the way from a sensor means for detecting shake to a control means for correcting shake. Regarding modules.

[0002]

2. Description of the Related Art In recent years, a compact camera equipped with a high-power photographing zoom lens system has been realized. In general, a small camera is often handheld for shooting, and therefore, in shooting at a long focal length, the effect of camera shake cannot be ignored. Further, in addition to the long focal length photography, the shutter speed may be slow and the exposure time may be long in photography such as night photography, which may also be affected by camera shake.

1 for preventing the influence of such camera shake
As one method, for example, there is a blur correction method that cancels the movement of the image on the film surface due to the blur by moving the photographing lens. For example, “Photo Industry” (Photo Industry Publishing Company 19
94.6 vol.52 No.628-32), an example of the blur correction system is described.

This camera shake correction system uses two angular acceleration sensors utilizing Coriolis force for detecting pitching and yawing due to camera shake as a camera shake detection sensor (vibration gyro) to generate a camera shake signal, and further a filter and an amplifier. The circuit performs a predetermined process to extract the frequency component of camera shake, and the CPU for camera shake correction performs arithmetic processing to generate a camera shake correction signal. Based on this blur correction signal, the lens capable of shift movement by the motor is finely shifted to cancel the blur.

[0005]

However, in the above-described blur correction system, in order to supply the voltage for driving the blur detection sensor and the AD reference voltage of the blur correction CPU, they are separately constituted by discrete components. It has a power circuit.

Therefore, the number of parts of the blur correction system is increased, and a relatively large space is required for the size of the camera. For this reason, it is an optimal function for a compact camera, but it causes an increase in camera size, weight, and cost.

Therefore, an object of the present invention is to provide a miniaturized shake signal processing module by generating a voltage for driving a vibration gyro and an AD reference voltage of a shake correction CPU in the module.

[0008]

In order to achieve the above object, the present invention comprises a sensor means for detecting camera shake,
A module provided on the way to a control means for performing a camera shake prevention operation, for performing a shake signal processing, and a differential amplification means for performing differential amplification between an output voltage of the sensor means and a predetermined reference voltage. , each time the output voltage of said differential amplifying means is AD conversion processing by the control means, said control
Whether the result of this AD conversion is within a predetermined range by means
And an information input unit for receiving a control signal output from the control unit according to the determination result, and the predetermined reference voltage is generated based on the signal input to the information input unit. A shake signal processing module for forming a reference voltage generator and at least one semiconductor substrate is provided. Furthermore, the blur signal processing module comprises a first predetermined voltage supplier to voltage supplied to the sensor unit. In addition, the blur signal processing module
Has a data latch unit for storing the control signal,
The reference voltage generator is stored in this data latch unit.
The predetermined reference signal is generated based on the data.

[0009]

According to the shake signal processing module having the above-described structure, each of the shake signal processing modules is capable of amplifying a shake signal due to camera shake and changing the amplified output level by a command from the control means according to the amplified output. sites are formed on at least one semiconductor substrate, based a predetermined reference voltage generated for use in this module, to generate a further different voltage required power to each blur detection and department is preventing means Voltage is supplied. Also the criteria
As for the voltage, the output voltage of the differential amplifier is AD-converted.
Whether or not the AD conversion result is within a predetermined range for each
Finger from the information input section based on the control signal according to the judgment result
Set by the indication.

[0010]

[0011]

Embodiments of the present invention will now be described in detail with reference to the drawings. FIG. 1 shows a conceptual configuration of a system using a blur signal processing module as an embodiment according to the present invention, and will be described.

This system includes a signal processing module 1
And a blur detection unit 2 that outputs a signal according to a camera shake state of the camera, and for processing an output signal of the blur detection unit 2,
For example, a signal processing module 1 that can be used as a bipolar IC
And a camera shake control unit 3 that controls some camera shake prevention measures based on the output from the signal processing module 1, that is, the information according to the camera shake state. The blur control unit 3
Sends a "CEN" signal to the signal processing module 1 to activate the signal processing module 1, and the control information signal changes / controls a signal processing mode in the signal processing module 1 described later and generates a predetermined voltage. And output.

Next, the internal structure of the signal processing module 1 will be described. The signal processing module 1 is controlled by the blur control unit 3 and supplies a predetermined voltage to the blur detection unit 2 and each component in the module.
An information input section 10 for sending a control information signal from the shake control section 3 to the reference voltage generation section 5, and the information input section 10
A reference voltage generator 5 for generating a reference voltage according to the information from the camera, and differential amplification of the reference voltage and a voltage generated by the camera shake detector 2 according to the camera shake state, and the result is described above. It is composed of a differential amplifier 4 for outputting to the shake controller 3.

As described above, the signal processing module 1 is activated by the "CEN" signal from the blur controller 3. Here, when this activation signal is output to the signal processing module 1, the predetermined voltage supply unit 19 is activated.
The process of generating the predetermined voltage in the predetermined voltage supply unit 19 will be described later. Based on the voltage generated here, the voltage is amplified with a desired amplification degree, and the amplified voltage is the power supply voltage of the shake detection unit 2.
Also, the shake information output from this module is supplied to the shake detection unit 2 and the shake control unit 3 as an AD conversion reference voltage of the shake control unit 3 that is AD-converted and taken in.

The control information signal from the blur control unit 3 is sent to the information input unit 10 in the signal processing module 1. Then, the information input section 10 takes in this information and sends it to the reference voltage generation section 5. The reference voltage generator 5 generates a reference voltage according to the transmitted information,
It is sent to the differential amplifier 4.

Then, the differential amplifier 4 performs differential amplification using the above-mentioned reference voltage and a voltage generated according to the camera shake state from the shake detector 2, and after this amplification, the output shakes. It is sent to the control unit 3. Here, the control information signal from the blur control unit 3 determines the outputs from the blur detection unit 2 and the reference voltage generation unit 5 according to the differential amplification result, as described later.

From the above, the blur signal processing module of the present embodiment differentially amplifies in accordance with the camera shake state including the offset / drift component from the blur detection unit 2 according to the control information from the blur control unit 3. At this time, in order to prevent the saturation of the increased output due to the offset / drift component, the level of the amplified output can be changed and a predetermined voltage is output to the shake detection unit 2 and the shake control unit 3.

Next, FIG. 2 shows a more specific structure of the blur signal processing module (system) shown in FIG. Here, of the constituent members shown in FIG. 2, the same members as those in FIG. 1 are designated by the same reference numerals, and the description thereof will be omitted. Each component is provided with two systems so as to detect a shake in the X-axis direction and a shake in the Y-axis direction.

In FIG. 2, the blur detection unit 2 is provided with two units: a blur detection unit 2X and a blur detection unit 2Y in order to detect the influence (camera plane X axis, Y axis) due to camera shake on the image plane. Has been.

In addition to the above-mentioned "CEN1" line, from the blur control unit 3 to the signal processing module 1, a data bus for transmitting control information (address, data) to the information input unit 10 is provided. , "AL1" and "DL1" lines are provided to distinguish whether the information to be transmitted is address information or data information.

In the information input section 10, it is judged whether the information sent out via the data bus is address information or data information based on the states of "AL1" and "DL1". The information is sent to the data sending selection unit 9. In the data transmission selection unit 9, the address to store the data information sent from the shake control unit 3 via the data bus, that is, to which one of the data latch units 6X and 6Y the data information is sent, is set. The information can be selected.

When data information is sent from the shake control section 3, the data latch section (data latch section 6) selected for use by the data sending selection section 9 is sent.
X or the data latch unit 6Y). The data sent to the data latch unit is stored here and also sent to the DAC (DA converter) 8.

The DAC 8 generates a predetermined current on the basis of the sent data, and this is generated by the IV converter 7.
To a current-voltage conversion. As described above, the DAC 8 and the IV converter 7 correspond to the reference voltage generator 5 in FIG. The voltage output from the IV converter 7 is sent to the differential amplifier 4 and differentially amplified with the output voltage from the shake detector 2 as described above. The output after this amplification is sent to the shake control unit 3 as "VX" and "VY". The DAC 8, the IV converter 7, the differential amplifier 4
Are independently provided for the X-axis and the Y-axis respectively corresponding to the vibration detection unit 2X and the vibration detection unit 2Y.

The "CEN1" signal in FIG. 2 is the same as the "CEN" signal described in FIG.
The 1 ″ signal activates the reference constant current generator 11 in the signal processing module 1.

The reference constant current generator 11 generates and outputs a constant current to each component for analog signal processing (amplification, predetermined voltage generation, DAC driving, etc.) performed in the signal processing module 1. Is. Only when the constant current generated here is supplied to each component, the signal processing module 1 can operate. This constant current is
It is also supplied to the constant voltage generator 12B. In this constant voltage generation unit 12B, a predetermined voltage used for performing analog signal processing in the signal processing module 1, a supply voltage to a shake detection unit 2 described later, and a camera control unit (CP).
U) 3 is used to generate an AD reference voltage for AD-converting and fetching the amplified output of the differential amplifier 4.

The output voltage of the constant voltage generator 12B is
The voltage is input to the constant voltage generation unit 12A, non-inverted and amplified to a predetermined voltage, and then supplied to the shake detection unit 2X and the vibration detection unit 2Y as a power supply voltage. As a result, it becomes possible for the first time to output a voltage according to the camera shake state of the camera by the shake detection unit 2. The output voltage of the constant voltage generator 12B is input to the constant voltage generator 12A, non-inverted and amplified to a predetermined voltage, and then the camera controller (CPU) 3
Is used as an AD conversion reference voltage for camera shake information VX and VY.

Next, FIG. 3 shows a more specific configuration of the blur signal processing module shown in FIGS. 1 and 2 and will be described. Here, of the constituent members shown in FIG. 3, the same members as those shown in FIGS. 1 and 2 are designated by the same reference numerals, and the description thereof will be omitted.

In FIG. 3, the camera shake controller 3 is connected to a camera body controller 20 for controlling the entire camera. The camera body control unit 20 controls the overall operation for performing normal shooting such as film winding / rewinding, driving a focusing lens, etc., and when blurring detection / correction is necessary in the operation of the entire camera, , And two-way communication with the blur control unit 3 at appropriate times. In FIG. 2, the data bus described above can also be used as a control information transmission unit for modules other than the signal processing module 1.

Further, based on the blur information taken in by the blur detection unit 2, an IFIC (interface) used to drive the actuator and PI in order to cancel (correct) the image movement amount on the image plane caused by the blur. IC) 21
Is. This is an actuator drive for tilting / eccentricity of a part of a photographing optical system (not shown in the text) for performing a shake prevention operation, a PI (photo interrupter) drive used for detecting a drive state of a shake correction device, and a PI output. Is processed. Motors (X) 22 and (Y) 23 for driving the shake correction device, and shake correction device position detection PIs 24 to 27 are connected to the IFIC 21. The position information (PI output pulse) is sent to the blur control unit 3 via another line.

The control of the IFIC 21 is controlled by "CEN2", "AL2", "DL" in addition to the control information by the data bus.
2 "line. IF by" CEN2 "
The IC 21 is activated. "AL2" and "DL2" are used in the same manner as "AL1" and "DL1" in the signal processing module 1 in the form of address information transmission and data information transmission.

The shake detection unit 2X and the shake detection unit 2
The output of Y is subjected to high frequency noise removal by the LPF 15, and then sent to the differential amplification section 4X and the differential amplification section 4Y. In addition, the amplification degree in the differential amplifier 4 is determined by the external resistance R
1, R2 (R3, R4), the output is V
It is sent to the camera control unit (CPU) 3 as X and VY.

Next, with reference to the flow charts of FIGS. 4 to 9, the blur detection and correction operation of the blur signal processing module thus configured will be described. First, a start signal is sent from the camera body controller 20 to the blur controller 3 via the communication line shown in FIG. 3 to initialize the camera (step S1). Here, the camera main body control unit 2 determines the operation of the release button of the camera, the zooming operation, and the like of the camera after the camera shake control unit 3 is activated.
The blurring control unit 3 performs the blurring detection / correction operation while receiving various kinds of information from the camera body control unit 20 as necessary as described later.

Next, it is judged whether or not the shake prevention photographing mode is selected as the photographing mode of the camera by an operation unit (not shown) in the text (step S2). This decision is
This is performed by the camera body control unit 20, waits until the selection is made (NO), and when selected (YES), information to that effect is sent to the blurring control unit 3.

Then, the "CEN1" line is changed from "H" to "L" (step S3). As a result, the signal processing module 1 is activated, and as described above, the power supply voltage is supplied to the shake detection unit 2 and the AD conversion reference voltage is supplied to the shake control unit 3. REBX, REB which is a variable for performing level shift of the amplification output of the shake detection unit 2 and a state monitor, which will be described later, and becomes predetermined reference voltage generation data.
The Y initial value is set (step S4).

Next, one loop time of the blur processing loop timer is set (step S5). This loop timer executes the camera shake detection (sampling by AD) in the shake control unit 3, the calculation of the AD result, the level shift judgment of the amplified output in the signal processing module 1, etc. within a predetermined cycle. Used for. Then, the set blur processing loop timer is started (step S
6).

Next, the camera shake information YX, VY from the signal processing module 1 is AD converted and fetched (step S).
7). The details will be described later with reference to FIG. AD above
For the shake information VX and VY that have been converted and captured,
The value of the level shift variables REBX and REBY described above is entangled to calculate the vibration information data in which the amount of level shift is corrected (step S8). The details will be described later with reference to FIG.

Then, the size of the shake information VX, VY which is AD-converted and taken in is determined, and the signal processing module 1
On the other hand, it is determined whether or not the level shift is performed next (step S9). If it is determined that the level shift is necessary (YES), the numerical contents of REBX and REBY are changed (step S10), and if not (NO),
Not changed Details will be described later with reference to FIG.

Based on the values of the variables REBX and REBY for the level shift in step S10, the data for the level shift is sent to the signal processing module 1.
In response to this data transmission, as described above, in the signal processing module 1, a predetermined voltage is generated by the DAC 8 and the IV conversion unit 7, and this and the output of the shake detection unit 2 are differentially amplified, and the shake control unit again. 3 is taken in (step S11). Details will be described later with reference to FIG.

Next, based on the accurate blur information calculated in step S8 and having the level shift corrected, HPF calculation for removing the DC component of the vibration information, LPF calculation for removing the high frequency noise component, and Pre-prediction calculation based on the pre-data up to now is performed (step S
12). These calculations are described in detail in Japanese Patent Application No. 6-43655 by the present applicant, and a description thereof will be omitted here.

On the basis of the calculated blur information, a camera blur prevention measure is taken (step S13). This shake prevention measure is, for example, to eccentrically or tilt a part of the taking optical system (not shown in the text) based on the calculation result in order to correct the current camera shake state as a result, and to shake the photographer through the viewfinder. It is conceivable that the correction state itself is shown. The details will be described later with reference to FIGS. At the time of step S13, since the exposure operation has not been performed yet, the blur prevention measure here may or may not be performed.

Next, it is judged whether or not the operation of the first release button of the camera is continued (step S1).
4). This determination is made by the blur control unit 3 detecting the state of the camera body side with respect to the camera control unit 20 via a communication line. When the operation of the first release button is continued (YES), it is determined whether or not the second release button of the camera is operated (step S15).

The determination in step S15 is made in the same manner as in step S14 described above. Here, when the second release button is not operated (NO), it is determined whether or not the shake processing loop timer started in step S6 has passed a predetermined time (step S16).
The process waits until a predetermined time elapses, and when the time elapses, the process returns to step S5 to repeat the blurring loop.

When it is determined in step S14 that the operation of the first release button of the camera has not been continued (NO), it is determined whether or not the shake prevention photographing mode has been canceled (step S17). This determination is made by the blur control unit 3 detecting the state of the camera body side with respect to the camera control unit 20 via a communication line.

If it is determined in this determination that the camera-shake prevention mode has not been released (NO), it is determined whether the time during which the first release button has not been operated has exceeded a predetermined time. (Step S18).

The determination in step S18 is made by the camera shake control section 3 detecting the state of the camera body side to the camera control section 20 via the communication line. The reasons are as follows. The photographer often thinks that the shake prevention shooting mode is still continuing even when the first release signal is OFF, and when the signal processing module 1 is turned OFF by the first release button OFF, immediately after this, the first and second When the release button is operated all at once, the signal processing module 1 is started. Therefore, the blur detection unit 2,
In addition, it takes time for the output of the signal processing module 1 to stabilize, and there is a risk that shooting will fail due to blurring prevention measures based on inaccurate blurring information.

In the determination of step S18, (N) is maintained for a predetermined time after the first release button is turned off.
O), the process proceeds to step S16, and if the predetermined time has elapsed (YES), it is determined that there is no intention to shoot, and the "CEN1" line is changed from "L" to "H" (step S19). . As a result, the signal processing module 1 is stopped, and in conjunction with this, the supply of the power supply voltage to the vibration detection unit 2 and the supply of the AD conversion reference voltage to the shake control unit 3 are also stopped. Then, it returns to step S2.

Next, in step S15, when it is determined that the second release button of the camera is operated (YES), the process proceeds to step S20 of the next stage. Before the second release operation is performed, the camera body control unit 20 performs operations for actual shooting, such as shutter speed / aperture value determination by photometry operation and extension of the focusing lens by distance measurement operation. It is assumed that

In this step S20, as in step S5, one loop time of the blur processing loop timer is set (step S20). This loop timer executes the camera shake detection (sampling by AD) in the shake control unit 3, the calculation of the AD result, the level shift judgment of the amplified output in the signal processing module 1, etc. within a predetermined cycle. Used for.

Next, the set blur processing loop timer is started (step S21). Then, similarly to step S7, the camera shake information YX, VY from the signal processing module 1 is AD-converted and captured (step S2).
2). The details will be described later with reference to FIG.

Then, with respect to the camera shake information VX and VY which are AD-converted and fetched, the above-mentioned level shift variable REB is used.
The vibration information data in which the level shift is corrected is calculated by entwining the values of X and REBY (step S23). The details will be described later with reference to FIG.

Next, the camera shake information V that has been AD-converted and imported
The magnitudes of X and VY are determined, and it is determined whether the signal processing module 1 should be level-shifted next (step S24). If it is determined that the level shift is necessary (YES), the numerical contents of REBX and REBY are changed (step S25), and if not (NO), they are not changed. Details will be described later with reference to FIG.

Next, for the level shift, the variables REBX,
Based on the value of REBY, the data for level shift is sent to the signal processing module 1. In response to this data transmission, as described above, in the signal processing module 1, the DAC and the IV conversion unit generate a predetermined voltage, and this and the output of the shake detection unit 2 are differentially amplified, and the shake control unit 3 again. (Step S26). Details will be described later with reference to FIG.

Similar to step S12, the HPF calculation for removing the DC component of the vibration information and the LPE calculation for removing the high frequency noise component are performed based on the accurate shake information data in which the calculated level shift is corrected. Then, the blur prediction calculation is performed based on the blur data up to the present (step S27).

Next, a camera shake prevention measure is taken based on the calculated shake information (step S28). This shake prevention measure is, for example, to eccentrically or tilt a part of the photographing optical system (not shown in the text) based on the calculation result in order to correct the current camera shake condition as a result, and shake the photographer through the viewfinder. It is conceivable that the correction state itself is shown. The details will be described later with reference to FIGS.

Then, it is determined whether or not the actual exposure operation by the camera body controller 20 has already started (step S).
29). This means that the camera shake control unit 3 controls the camera control unit 20.
For the determination, the state is detected on the camera body side via the communication line. When the release time lag remains and the actual exposure has not been performed yet (NO), the process proceeds to step S31 described below, and the loop for detecting blurring and correcting the influence of blurring is repeated. On the other hand, if the actual exposure has already started (YES), the camera body controller 2
At 0, it is determined whether or not the actual exposure operation has completed the exposure time and the exposure operation has ended (step S30). This determination is made by the blur control unit 3 detecting the state of the camera body side with respect to the camera control unit 20 via a communication line.
If the exposure operation is finished here (YES), post-processing of a blur prevention measure is performed (step S32). Specifically, it is conceivable to return (center) the shake correction device (not shown in the text) to the initial state (center position). afterwards,
Return to step S2.

However, if the exposure operation is not completed yet (NO), in order to continue the exposure operation and the blur prevention measure,
It is determined whether or not the blur processing timer started in step S22 has passed a predetermined time (step S3).
1). When the predetermined time has elapsed, the process returns to step S20,
If the predetermined time has not yet been reached (NO), the process waits until the predetermined time elapses.

According to the routine described above, the blur detection and blur correction are performed in the blur signal processing module. Next, the subroutines of steps S7 to S11, step S13, steps S22 to S26, and step S28 in the flowcharts of FIGS. 4 and 5 will be described with reference to FIGS.

FIG. 6 (a) is a flowchart for AD-converting the camera-shake information VX, VY in step S7 and step S22 and fetching it. First, when using the AD conversion function of the blur control unit 3, an instruction to activate the AD converter is executed (step S41). Next, A
D data "VX" and "VY" are fetched (steps S42 and S43).

Then, the captured "VX" and "V
Y "is transferred to the RAMs" ADX "and" ADY "(steps S44 and S45), and the AD converter started in step S41 is stopped, and step S8 in FIG. The process proceeds to the data correction in step S23.

Next, FIG. 6B shows step S8 of FIG.
And the camera shake information VX, VY in step S23 of FIG.
Entangling the values of the level shift variables REBX and REBY,
This is a subroutine for calculating the blur information information in which the amount of level shift is corrected.

The blur information transferred to "ADX" in step S44 is read (step S51).
Next, the level shift of the amplified output of the blur detection unit 2 and the status monitor variable REBX are read (step S
52). The shake information data in which the amount of level shift is corrected is calculated by the following arithmetic expression, and the result is transferred to "ADXX" (step S53).

ADXX ← ADX + k * REBX As described above, REBX means the current level shift state, and if REBX = 0, the value of "ADX" read in step S51 is directly the calculation result "ADXX.""It becomes. Here, “k” is a coefficient corresponding to the level shift amount when the output of the blur detection unit 2 is amplified by the differential amplifier 4 in the signal processing module 1. For example, if there is one level shift to the negative side,
REBX = -1, and the level shift data "ADX" before level shift read in step S51 is subtracted by one level shift to obtain "ADXX", that is, accurate blur information.

Next, similar to steps S51 to S53, the same process is performed for the Y axis of the image plane (step S5).
4 to S56). When this subroutine process is completed, the process proceeds to step S9 in FIG. 4 or step S24 in FIG.

FIG. 7A shows the level of the blurring information data “VX” and “VY” fetched by the AD conversion in step S9 of FIG. 4 or step S24 of FIG. It is a subroutine for determining whether or not to shift.

First, the blur information "AD" fetched by AD
It is determined whether or not X "is larger than the level shift upper limit predetermined value" TH ⁺ "(step S61).
When it is determined that> TH ⁺ (YES), it is necessary to perform the level shift and drop the output from the signal processing module 1 by one level shift, and the value of REBX is incremented (step S65).

However, if ADX <TH ⁺ (NO),
The shake information "ADX" is the level shift lower limit predetermined value "TH".
^- "Is determined (step S6)
2). If it is determined that ADX <TH ⁻ (Y
ES), it is necessary to perform a level shift and raise the output from the signal processing module 1 by one level shift.
The value of X is decremented (step S66). However, ADX> TH ^- For determining whether greater than (NO), "ADY" is "TH ^+" (Step S
63).

Thereafter, steps S61, S62, S64,
Similar to S65, similar processing is performed for the Y axis of the image plane. When it is determined that ADY> TH ⁺ (YES), it is necessary to perform the level shift and drop the output from the signal processing module 1 by one level shift, and the value of REBY is incremented (step S67).

However, when ADY <TH ⁺ (NO),
The blur information "ADY" is the level shift lower limit predetermined value "TH".
^- "Is determined (step S6)
4). If it is determined that ADX <TH ⁻ (Y
ES), it is necessary to perform a level shift and raise the output from the signal processing module 1 by one level shift.
The value of X is decremented (step S68). When any of steps S64, S67, S68 is completed, step S10 of FIG. 4 or FIG.
Then, the process proceeds to step S25.

Next, FIG. 6B shows step S1 of FIG.
0, S11, or variables REBX and REBY for level shift in steps S25 and S26 of FIG.
This is a subroutine for transmitting data for level shift to the signal processing module 1 based on the value of.

First, when sending the data (REBX) for generating the reference voltage when amplifying the output of the shake detecting section 2X to the signal processing module 1, the sending destination (address) information of this data is set. (Step S7
1). Specifically, the address information is set by being loaded on the data bus in FIG.

Next, the "AL1" line is changed from "H" to "L".
(S72). As a result, the address information set in the data bus is input to the information input unit 10 in the signal processing module 1 (step S73). In response to this, the signal processing module 1 causes the data transmission selection unit 9 to store a data latch unit (REBX) for storing the reference voltage generation data (REBX) transmitted thereafter (in the case of step S72, the data latch unit). Part 6X).

Next, the "AL1" line is changed from "L" to "H".
To As a result, even if the data (REBX) for generating the reference voltage is set in the data bus next time, it will not be confused with the address information (step S73). Read the value of REBX determined in step S9 of FIG. 4 or step S24 of FIG. 5, that is, FIG.
This information is converted into binary data so that it can be set in the data bus. Here, if the information for generating the reference voltage sent to the signal processing module 1 via the data bus is in a 3-bit format, if REBX = ± 0, then [1
00] b, REBX = + 2, [110] b, R
If EBX = −3, the form is [001] b. That is, the upper bits corresponding to the MSB serve as a code. Next, the value-encoded version of REBX read in step S74 is set on the data bus (step S75).

The "DL1" line is changed from "H" to "L".
(Step S76). As a result, the reference voltage generation data (R
EBX) is taken into the information input unit 10 in the signal processing module 1. In response to this, the signal processing module 1 sends the reference voltage generation data (REBX) to the selected data latch unit (in this case, the data latch unit 6X) by the data transmission selecting unit 9 in step S72 described above. . Data latch unit 6 in the signal processing module 1
The data of X is sent to the DAC8X as it is. Then, a predetermined voltage is generated based on REBX by the DAC 8X and the IV conversion unit 7X, input to the differential amplification unit 4X, and differentially amplified with the output voltage of the shake detection unit 2X.

Next, the "DL1" line is changed from "L" to "H".
(Step S77). As a result, even if the information (address) to which the data (REBX) for generating the reference voltage when the output of the shake detection unit 2Y is amplified is set in the data bus, the data for generating the reference voltage is set. (RE
It will not be confused with BX).

Thereafter, in steps S78 to S84, similar processing is performed for the Y axis of the image plane as in the case of the X axis of the image plane in steps S71 to S77 described above. When step S84 ends, the process proceeds to step S12 in FIG. 4 or step S27 in FIG.

Although the present embodiment has been described with reference to the flow charts of FIGS. 6 to 7, the procedure of performing the process on the image plane Y axis after performing the process on the image plane X axis is not limited to this. , FIG. 6A only with respect to the image plane X axis.
The procedure may be such that the process corresponding to (d) is continuously performed, and after this process is completed, the same process is continuously performed on the Y axis of the image plane.

Further, in FIG. 6A, REBX and R
If there is no EBY increment / decrement at all, the level shift state continues as it is, so the process of FIG. 7B may not be performed. Further, when the state of either REBX or REBY changes, the process of FIG. 7B may be performed only for the changed axis.

Next, referring to FIGS. 8 and 9, step S of FIG.
13 and the "shake prevention measure" subroutine described in step S28 of FIG. 5 will be described. Here, the actuator for driving the shake correction device (not shown in the text) is a motor X22 connected to the IFIC 21 in FIG.
Motor Y23, which is the X axis and Y on the film surface, respectively.
Corresponds to the axis. Further, these motors are actually driven by the applied voltage value and the time width (PWM) of the applied voltage.

First, it is judged whether or not the position information of the blur correction lens (not shown) in the text is entered in the form of interruption (step S91). Specifically, this is the IF in FIG.
PI24 to PI27 connected to the IC 21 are used as the position detection unit of the blur correction lens, and the output waveform (pulse) is input to the blur control unit 3 via the IFIC1.

If the position information (pulse) is included in this determination (YES), the drive speed of the blur correction lens is calculated in order to compare the current blur state with the current drive speed state of the blur correction lens. There is a need to. Therefore, the drive speeds LSX and LSY of the blur correction lens are calculated (step S92). Specifically, it is calculated from the interrupt input interval of the PI output (pulse).

However, if the position information is not entered in step S91 (NO), it is determined whether or not the blur correction lens has already been driven (step S93). Here, this determination is made when the blur correction lens has not been started yet, or when the blur correction lens has already been driven, and there is no interruption of the blur correction lens position detection information at the timing of step S91. It is done to distinguish the case. It is safe to treat the lens drive speed state as zero if the blur correction lens has not started driving yet, but treat it as zero if the drive has already started. May cause an error. In this determination, if it is before the start of the blur correction lens (YES), it is treated as the drive speed of the blur correction lens: LSX = 0, LSY = 0 (step S94), and if not before the start of the blur correction lens (NO), To step S95. Here, the driving speeds LSX and LSY of the blur correction lens determined in step S92 or step S94 are used as they are in the step described later. In the present embodiment, the process of step S94 is not performed after the driving of the blur correction lens is started once.

Next, the current shake information ADXX calculated in step S92 is read (step S95), and the current shake correction lens drive speed information LSX is read (step S96). Then, the two are compared (obtained) to determine how much the blur correction lens should be moved (step S97). This is due to camera vibration (shake) that is currently occurring by controlling the drive of the shake correction lens so that the current shake state of the camera and the drive speed state of the shake correction lens are synchronized with different signs. It is possible to cancel the image movement on the film surface.

Based on the determined condition of the blur correction lens to be driven next, a drive table (not shown) in the text is referred to (step S98), the blur correction motor drive voltage information: VMX, and the correction motor PWM. Information: PWMX is determined (step S99).

Next, it is determined whether or not the blur correction motor drive voltage information VMX determined in step S99 is different from the previous value (step S100). This is for controlling the IFIC 21 to drive the motor (X) 22 at a predetermined voltage via a data bus, as will be described later, when the blur correction motor drive voltage value is different from the previous value. If it is determined that the VMX is the same as the previous value (NO), the process proceeds to step S108 described later. However, when it is determined that the VMX is different from the previous value (YES), the address information of the destination to which the drive voltage information is sent is connected from the shake control unit 3 to the signal processing module 1 and the IFIC 21. The data bus is set (step S101).

Then, change the "AL2" line to "H" →
It is set to "L" (step S102). As a result, the address information set in the data bus in step S101 becomes I
It is input to the FIC21. In response to this, the IFIC 21 receives a signal from the motor (X) 22 which is subsequently sent out by a section equivalent to the data sending selection section 9 of the signal processing module 1.
The destination for storing the data for generating the drive voltage is selected. Here, when sending information to the IFIC 21, "AL2" is used instead of the previous "AL1". As a result, even if the data bus common to the signal processing module 1 is used, transmission information will not be confused.

Next, the "AL2" line is changed from "L" to "H".
(Step S103). As a result, even if the data for generating the drive voltage (VMX) of the motor (X) 22 is set in the data bus next time, it will not be confused with the previous address information. Then, the determined blur correction motor drive voltage information VMX is read (step S104). Then, the read blur correction motor drive voltage information VMX is set in a form of being mounted on the data bus (step S10).
5).

Next, the "DL2" line is changed from "H" to "L".
(Step S106). As a result, the shake correction motor drive voltage data (VMX) set in the data bus in step S105 is taken into the IFIC 21. In response to this, the IFIC 21 receives the above step S1.
Destination of VMX selected in 02 (predetermined address)
Then, the motor drive voltage data (VMX) for blur correction is set. As a result, a predetermined voltage is applied to the motor (X) 22.

Then, change the "DL2" line to "L" →
It is set to "H" (step S107). As a result, blur correction motor drive voltage information data (VMY) to be applied to the motor (Y) 23 corresponding to the Y axis of the image plane next to the data bus.
Even if the information (address) of the destination to which is transmitted is set, it will not be confused with the shake correction motor drive voltage information data (VMX).

Next, the blur correction motor PWM information PWMX determined in step S99 is read (step S108). Then, the read shake correction motor P
It is determined whether the WM information PWMX is different from the previous value (step S109). This is because when PWMX is different from the previous value, it is necessary to set a new value and drive the PWM of the motor (X) 22. If it is determined that the value is different from the previous value (YES), PWM
The value of X is changed (step S110), and the motor (X) 22 is driven with a predetermined PWM value. On the other hand, if the PWM value is determined to be the same as the previous time (NO), step S11
The value shifts to 1 and the previous PWM value (PWMX) is continued.

Up to this point, the operation relating to the Y-axis of the image plane has been described, but hereinafter, from step S111 to step S1.
Up to 26, the operation relating to the Y-axis of the image plane is described, and the steps S95 to S11 described above are performed.
It is the same as the one corresponding to the image plane X-axis up to 0, and the description thereof is omitted here.

As described above, by operating the lens by moving it about the X and Y axes of the image plane, it is possible to detect and prevent camera shake. Next, an outline of the operation in the signal processing module 1 will be briefly described with reference to the flowchart shown in FIG.

First, when "CEN1" connected to the blur control unit 3 is "H" → "L", the signal processing module 1
Is activated (step S131). In response to the change of “H” → “L” of “CEN1”, the reference constant current generation unit 11 in FIG. 3 is activated, and the supply of the reference current to each component in the signal processing module 1 is started (step S132).

Next, in response to the supply current from the reference constant current generator 11, the constant voltage generator 12B generates a predetermined reference voltage (step S133). The voltage generated here is supplied to each component in the signal processing module 1 as a reference voltage. In addition, the constant voltage generator 12
At A, the voltage from the constant voltage generator 12B is non-inverted and amplified to generate a predetermined voltage. This voltage is supplied from the signal processing module 1 to the two shake detection units because it is supplied as a power supply voltage for the shake detection units 2X and 2Y. The constant voltage generator 12C non-inverts and amplifies the voltage from the constant voltage generator 12B to generate a predetermined voltage. This voltage is A of the shake control unit 3.
Since it is supplied as the D conversion reference voltage, it is output from the signal processing module 1 to the shake control unit 3. The circuit configuration of this part in the signal processing module 1 will be described later.

Next, "A" connected to the blur control unit 3
In response to the change from "H" to "L" of L1 ", the data set in the data bus connected to the blur control unit 3 (address information of the used latch) is fetched, and the data transmission selection unit 9 receives the data bus. The data latch unit (the data latch unit 6X or the data latch unit 6Y in FIG. 3) is selected based on the data (address information) set in (step S134).

Further, in response to the change of "H" to "L" of "DL1" connected to the blur control unit 3, the data set in the data bus connected to the blur control unit 3 (use) Take in the data stored in the latch). Then, this data is sent to the data latch unit 6 (X OR Y) selected in step S134 (step S135).

The data sent in step S135 is the data latch unit 6X and the data latch unit 6X.
It is stored in Y and also DAC8X and DAC8Y
Sent to. From this point onward, it is common to both X and Y, and DA
In C8, a current is output based on the data sent from the data latch unit 6, and this output current is the IV conversion unit 7
Is converted into voltage. Then, the voltage-converted output is differentially amplified by the differential amplifier 4 with the output from the blur detector 2 from which the high-frequency noise component is removed by the LPF 15. The amplification degree here is determined from the relationship between the external resistors R1 and R2, and the outputs after the differential amplification are output to the shake control unit 3 as VX and VY (step S136).

If there is no change in the data to be sent to the data latch unit 6 in steps S134 and S135, the DAC 8 and the IV converter 7 apply a constant voltage to the differential amplifier 4. And continue to output.

In the signal processing module 1, the reference constant current generating unit 11 causes the respective components in the signal processing module 1 to change when "CEN1" from the shake control unit 3 described above changes from "L" to "H". To stop the current supply to the
All the operations in the signal processing module 1 described above are stopped. Along with this, the voltage supply to the shake detection unit 2 and the supply of the AD reference voltage to the shake control unit 3 are also stopped, so that the shake detection unit 2 detects the camera shake state and the shake control unit 3 shakes the camera. Will not be grasped.

Next, FIG. 11 shows changes in ADXX, ADX and REBX when the above-mentioned level shift is carried out. 11A is ADXX, and FIG. 11B is AD.
X, the figure (c) represents REBX. First, FIG.
(A) shows a trajectory of ADXX, which is an actual blur trajectory obtained by amplifying the camera shake output detected by the blur detection unit 2 by the signal processing module 1 and correcting the level shift. Here, the horizontal axis represents time and the vertical axis represents voltage.
If the blur detection unit 2 is, for example, an angular velocity sensor, the voltage information [V] becomes the angular velocity [DEG / SEC].

FIG. 11B shows the trajectory of ADX, in which the shake output detected by the shake detecting section 2 is amplified by the signal processing module 1 in a level-shifted manner, and then the VX is sent to the shake controlling section 3. It is a signal sent as. Similarly to FIG. 11A, the vertical axis represents the voltage [V] and the angular velocity [DEB / SEC]. 11 (a),
In (b), the level of REF is a point at which the angular velocity is zero (that is, prezero). FIG. 7C is a diagram showing the state of REBX, and this change will be described later.

Next, look at the loci of FIGS. 11A and 11B. In T0 to T1, ADXX (actual blurring state) falls between the level shift upper limit predetermined value: TH ⁺ and the level shift lower limit predetermined value: TH-, so the value of REBX is ± 0. ADX is the same as ADXX.
Following the ADX trajectory from T0 to T1, there is a point T1 above TH ⁺ . The point that blocks TH ⁺ is detected by the flowchart described in FIG. 7A (step S61), and the value of REBX is incremented (step S62). This can be seen from the fact that the value of REBX changes from ± 0 to +1 in FIG. 11 (c).

Next, as described in the flowchart of FIG. 7B, the value of REBX is sent to the signal processing module 1, and the signal processing module 1 receives this and generates a predetermined voltage to output the shake detection unit 2. And differentially amplified. Since the content of REBX is one step larger than that in the previous state, the result of the differential amplification is that the voltage drops by one level shift, that is, (TH ⁺ −TH ⁻ ) [V]. This means TH ⁺ at the point where the ADX locus in FIG. 7B is T1.
From [V] TH ^- can be seen in it is in the [V].
Then, the actual vibration state ADXX is the above-mentioned calculation formula ADD.
Calculated from XX ← ADX + k * REBX. here,
The coefficient k is actually (TH ⁺ −TH ⁻ ) [V].

This transition to T1 is a repetition of the above, and when ADX blocks TH ⁺ , the value of REBX is incremented with respect to the previous state, and when TH ⁻ is blocked,
The value of REBX will be decremented with respect to the previous state. Then, with the above-mentioned ADXX calculation formula, it is possible to grasp the accurate vibration state even if the level shift is performed. As a result, it is possible to widen the blur detection range while apparently amplifying the output of the blur detection unit 2 at a high magnification. Therefore, even if the blur detection unit 2 drifts due to a temperature change or the like, the blur state can be accurately grasped by the blur control unit 3.

Next, referring to FIG. 12, the predetermined voltage supply section 19 shown in FIG. 1, that is, the reference constant current generating section 11 shown in FIG.
A circuit example of the constant voltage generator 12A, the constant voltage generator 12B, and the constant voltage generator 12C in the signal processing module 1 will be described.

In FIG. 12, the CEN (CEN1) terminal is connected to the base of the transistor Q1.
When the N (CEN1) terminal becomes "L", the reference current current source generator 11 (Widler type constant current source circuit) on the left side in the figure operates. When this circuit operates, a constant current is supplied to a constant voltage generating unit 12B described later so that a predetermined voltage is generated, and a constant current is also supplied to the constant voltage generating unit 12A and the constant voltage generating unit 12C. It Further, the current drawing type constant current sources A1 and A2, the current supply type constant current source B
1, B2 is activated. These constant current sources are supplied to each component in the signal processing module 1 in FIG. 3 and used to execute the function of each component.

In the constant voltage generator 12B, the potential at the point Z1 is input to the base of the transistor Q2 and stabilized by the amplifier (buffer) to become the output V ¹²⁶ . This V
¹²⁶ is supplied to each component in the signal processing module 1 in FIG. 3 and is used to execute the function of each component, and also the transistor Q of the constant voltage generator 12A described later.
3 and the transistor Q4 of the constant voltage generator 12C.

Then, the constant voltage generator 12A receives the constant voltage output V ¹²⁶ from the constant voltage generator 12B, performs non-inversion amplification at the amplification degree determined by the resistance ratio of the resistors R1 and R2, and outputs SVCC. Becomes

This SVCC is output from the signal processing module 1 because it is supplied as the power supply voltage of the shake detecting section 2X and the shake detecting section 2Y described above. Here, the resistance ratio of R1 and R2 is determined so that a desired SVCC (that is, the power supply voltage of the shake detection unit 2) can be obtained.

The constant voltage generator 12C receives the constant voltage output V ¹²⁶ from the constant voltage generator 12B and receives the resistance R3.
Non-inverting amplification is performed according to the amplification degree determined by the resistance ratio of R4, resulting in ADVREF. This ADVREF is output from the signal processing module 1 because it is supplied as an AD conversion reference voltage for AD-converting and capturing the signal processing module 1 outputs VX and VY in the shake detection unit 3 described above. Here, R3 and R are set so that a desired ADVREF (that is, the AD conversion reference voltage of the shake control unit 3) can be obtained.
A resistance ratio of 4 is determined.

Next, referring to the time chart of FIG.
The generation timing of the predetermined constant voltage in the circuit configuration shown in FIG. 12 described above and the states of the signal processing module 1, the blur detection unit 2, and the blur control unit 3 that use the generated voltage as a source will be described.

FIG. 13A shows "CEN"("CEN1") sent from the blur control unit 3 to the signal processing module 1.
Of the signal processing module 1, the reference constant current generator 11 of the signal processing module 1 is in the operating state, and the same figure (c) is the constant voltage generator (B) 12B of the signal processing module 1 in the state of FIG. (D) is a constant voltage generator (A) of the signal processing module 1.
12A shows the state of the constant voltage generator (C) 12C of the signal processing module 1 in FIG. 12E, and shows the actual vibration state (angular velocity) of the shake detection unit 2 in FIG. g) is a voltage output state according to the vibration (angular velocity) of the shake detection unit 2, (h) is an operation amplification output state in the signal processing module 1, (i) is a signal in the shake control unit 3. The state where the output of the processing module 1 is taken in by AD is shown. Each horizontal axis represents time, and FIG.
The vertical axes of (d), (e), (g), (h), and (i) indicate voltage, and (f) of the figure shows angular velocity [DEG / SEC].

First, in FIG. 13A, when the "CEN1" terminal of the blur control unit 3 changes from "H" to "L" (falling), as shown in FIG. The reference constant current generator 11 operates (see FIG. 13).
(B)).

Then, as shown in FIG. 13B, when the reference constant current generator 11 operates, the generated constant current is supplied to each component in the signal processing module 1 and the constant voltage generator 12B. Is also supplied, and a constant voltage V ¹²⁶ is generated in FIG. As described above with reference to FIG. 12, the constant voltage V ¹²⁶ is supplied to the constant voltage generating unit 12A and the constant voltage generating unit 12C in addition to the components of the signal processing module 1. As a result, as shown in FIGS. 13D and 13E, the power supply voltage SVCC for the shake detection unit 2 (see FIG.
(D)), and reference voltage AD for AD conversion of the shake control unit 3
VREF (FIG. 13E) is generated. For the first time, the shake detection unit 2 receives the SVCC and can output a voltage according to the detected shake (angular velocity). In addition, the blur control unit 3 is AD
Upon receiving VREF, the AD converter of the shake control unit 3 can be used for the first time.

FIG. 13 (f) shows an actual vibration state (angular velocity) in the shake detecting section 2. This is not a voltage output, but vibration (angular velocity) itself occurs regardless of the state of the “CEN1” signal in FIG. Then, the SVCC in the constant voltage generator 12A of FIG.
In response to the generation, the blur detection unit 2 starts voltage output according to the vibration (angular velocity). The signal processing module 1 takes in the output of the blur detection unit 2 and differentially amplifies the output (FIG. 13 (h)). Here, the waveform of FIG. 13 (h) is shown in FIG.
Compared with the waveform of 3 (g), it is inverted (differential) amplified with a desired amplification degree, so it is approximately (1/2) VCC
The sign is inverted with reference to. And in FIG.
13 (i) is a state when the shake control unit 3 captures the amplified output of the signal processing module 1 of FIG. 13 (h).
ADVREF in the constant voltage generator (C) 12C of 3 (e)
In response to the occurrence, the blur control unit 3 can perform AD conversion.

The waveforms of FIGS. 13 (h) and 13 (i) are drawn in the form of inverting amplification of the output of the blur detection unit 2 of FIG. 13 (g) for the sake of explanation. However, as described above with reference to FIGS. 4 to 11, the blur control unit 3 controls the signal processing module 1 so that the level shift is performed according to the output of the signal processing module 1 in the blur control unit 3. Since the reference voltage generation data at the time of differential amplification is sent, the level of the differential amplification width output is shifted. Therefore, FIG.
The waveforms of (h) and (i) are actually the waveforms shown in FIG.
As in ADX (ADY) in (b), the waveform is in a form in which the level is shifted between TH ⁺ and TH ⁻ .

According to the above embodiment of the present invention, the following constitution can be obtained. (1) Blurring detecting means for detecting a blurring state of a camera, a blurring signal processing module for processing an output from the blurring detecting means, a blurring control means for taking in an output from the blurring signal processing module, and the blurring signal processing. A blur signal processing module, comprising: a predetermined voltage supply unit included in the module, which supplies a predetermined voltage to the blur detection unit in response to a control signal from the blur control unit.

(2) Blurring detecting means for detecting the blurring state of the camera, a blurring signal processing module for processing the output from the blurring detecting means, blurring control means for taking in the output from the blurring signal processing module, and A shake signal included in the shake signal processing module, and a predetermined voltage supply means for supplying a predetermined voltage to the shake control means (CPU) in response to a control signal from the shake control means. Processing module.

(3) The shake signal processing module according to (1), wherein the predetermined voltage supply means supplies a predetermined voltage to at least two shake detection means.

As described above, according to this embodiment, first, the camera shake signal is amplified, and the camera shake signal processing in which the amplification output level can be changed in response to a command from the control means in response to the amplified output. In the module, a necessary voltage is further generated based on a predetermined voltage generated for use in the module, and the generated voltage is supplied to the shake detecting means as a power supply voltage. As a result, a new voltage generating means such as a regulator is not required, so that it is possible to reduce the number of parts and the mounting area of parts, and it is possible to reduce the size and cost of a camera for detecting blur. Further, since the power supply voltage is supplied to the shake detecting means only when shake detection is required, it is possible to save the power supply.

Secondly, the power supply voltage is supplied to the plurality of shake detecting means on the basis of the predetermined voltage generated in the signal processing module. As a result, a new voltage generating means such as a regulator is not required, so that it is possible to reduce the number of parts and the mounting area of parts, and it is possible to reduce the size and cost of a camera for detecting blur.

Thirdly, in a camera shake signal processing module capable of amplifying a camera shake signal and changing an amplification output level in response to a command from a control means in accordance with the amplified output, the signal is generated for use in this module. Based on the predetermined voltage, a necessary voltage is further generated, and this is supplied to the shake control unit 3 as an AD conversion reference voltage. As a result, a new voltage generating means such as a regulator is not required, so that it is possible to reduce the number of parts and the mounting area of parts, and it is possible to reduce the size and cost of a camera for detecting blur. Further, since the AD conversion reference voltage is supplied to the blur control means only when the blur control means fetches the blur information, it is possible to save the power supply.

[0122]

As described above in detail, according to the present invention, the voltage for driving the vibration gyro and the AD of the blur correction CPU are set.
A reference voltage can be generated in the module, and a downsized blurring signal processing module can be provided.

[Brief description of drawings]

FIG. 1 is a diagram showing a conceptual configuration of a system using a blur signal processing module as an embodiment according to the present invention.

FIG. 2 is a diagram showing a more specific configuration of a blur signal processing module (system) shown in FIG.

3 is a diagram showing a more specific configuration than the blur signal processing module shown in FIGS. 1 and 2. FIG.

FIG. 4 is a first half flowchart for explaining a blur detection and correction operation of the blur signal processing module of the present embodiment.

FIG. 5 is a second half flowchart for explaining a blur detection and correction operation of the blur signal processing module of the present embodiment.

FIG. 6A is a flowchart for explaining a procedure of AD-converting and capturing camera-shake information VX and VY, and FIG. 6B is a diagram for calculating camera-shake information data in which the amount of level shift is corrected. 6 is a flowchart for explaining

FIG. 7 (a) is a flowchart for explaining the determination of the presence / absence of level shift, and FIG. 7 (b).
3 is a flow chart for explaining a level shift routine.

FIG. 8 is a first half flowchart for explaining a subroutine of “blur prevention measure” in the blur signal processing module of the present embodiment.

FIG. 9 is a second half flowchart for explaining a subroutine of “blur prevention measure” in the blur signal processing module of the present embodiment.

FIG. 10 is a flow chart for explaining an outline of operation in the blur signal processing module of the present embodiment.

FIG. 11: ADXX and AD when level shift is performed
It is a figure which shows the change of the X and REBX signals.

12 is a diagram showing a circuit example of a reference constant current generating unit and a constant voltage generating unit shown in FIG.

13 is a diagram showing the timing of each operation signal of the blur signal processing module in the circuit configuration shown in FIG.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Signal processing module, 2, 2X, 2Y ... Blurring detection part, 3 ... Blurring control part, 4, 4X, 4Y ... Differential amplifier, 5
... reference voltage generating section, 6, 6X, 6Y ... data latch section,
7, 7X, 7Y ... IV converter, 8, 8X, 8Y ... DA
Conversion unit, 9 ... Data transmission selection unit, 10 ... Information input unit, 1
1 ... Reference constant current generator, 12, 12A, 12B, 12C
... constant voltage generator, 15 ... LPF, 19 ... predetermined voltage supply section, 20 ... camera body control section, 21 ... IFIC, 22,
23 ... Motor.

─────────────────────────────────────────────────── ─── Continuation of the front page (56) Reference JP-A-5-14801 (JP, A) JP-A-6-130474 (JP, A) JP-A-5-340740 (JP, A) JP-A-5- 181180 (JP, A) (58) Fields surveyed (Int.Cl. ⁷ , DB name) G03B 5/00 G03B 17/00

Claims (3)

(57) [Claims] 1. A module, which is provided in the middle of a path from a sensor unit that detects camera shake to a control unit that performs a camera shake prevention operation, and that performs camera shake signal processing, wherein an output voltage of the sensor unit and a predetermined value are provided. Differential amplifying means for performing differential amplification with the reference voltage and the output voltage of the differential amplifying means is AD by the control means .
Each time the conversion processing is performed, the AD conversion result is obtained by the control means.
This judgment result is judged by judging whether the result is within the predetermined range.
An information input section for receiving a control signal output from the control means according to the result, and a reference voltage generation section for generating the predetermined reference voltage based on the signal input to the information input section, A blur signal processing module, which is provided on at least one semiconductor substrate. 2. A module which is provided in the middle of a route from a sensor means for detecting camera shake to a control means for preventing camera shake, and which performs shake signal processing, wherein the output voltage of the sensor means and a predetermined value. Differential amplifying means for performing differential amplification with the reference voltage and the output voltage of the differential amplifying means is AD by the control means .
Each time the conversion processing is performed, the AD conversion result is obtained by the control means.
This judgment result is judged by judging whether the result is within the predetermined range.
An information input unit for receiving a control signal output from the control unit according to the result; a reference voltage generation unit that generates the predetermined reference voltage based on a signal input to the information input unit; A shake signal processing module comprising: a first predetermined voltage supply section for supplying a voltage to the sensor means; and at least one semiconductor substrate. 3. A data latch unit for storing the control signal.
The a, the reference voltage generating unit, the data latch unit
Generates the predetermined reference signal based on the stored data.
The blurring signal processing module according to claim 1, wherein the blurring signal processing module is generated.