JP2006186652A - Imaging apparatus - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an imaging apparatus for optimum camera-shake correction. <P>SOLUTION: A first case 51 is provided with a first camera module 511 which is a first imaging part and angular speed sensors 514a and 514b for detecting camera shake. A second case 52 is provided with a second camera 521 capable of imaging in the direction different from that of the first camera 511 of the first case 51. The camera-shake of the first camera 511 or that of the second camera 521 can be selectively corrected in the camera-shake correction system contained in a DSP513. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to an imaging apparatus equipped with a shake detection sensor and having a camera shake correction function.

  A camera in which an image of a subject is formed on a light receiving surface of an image sensor such as a CCD by an imaging optical system, and converted into an electric signal and captured is known as a video camera or a digital camera.

Since the video camera continuously captures the image of the subject, if the camera shakes, the reproduced image will be shaken and difficult to shake.
In a digital camera, due to the sensitivity limit of the image sensor, it is difficult to realize a short shutter time, and an image captured by camera shake tends to cause blur such as an image flow.
Therefore, various cameras have been proposed that include a shake detection sensor such as an angular velocity sensor and have a shake correction function that performs shake correction based on the detection result of the shake detection sensor.

  Patent Document 1 describes a television camera in which a camera shake detection sensor is arranged in the vicinity of a lens and correction is performed based on the detection result of the sensor.

Further, Patent Document 2 describes a video camera that performs correction by calculating an angle change rate using an angular velocity sensor.
Japanese Patent Laid-Open No. 9-105973 JP-A-5-191709

  By the way, mobile terminals with a camera function including an imaging device such as a digital camera in a mobile phone or the like have become widespread. However, a camera shake correction apparatus is also mounted on these mobile terminals with a camera function.

For example, in the case of a foldable type or a structure in which the camera unit rotates as seen in recent mobile phones, the part where the user is holding the device is separated from the actual camera unit, or the positional relationship is different.
In such a case, the blur amount and direction detected by the blur detection sensor do not coincide with the blur amount and blur direction that are actually generated in the camera part, so at least the sensor that detects the blur is on the same plane as the camera unit. If it is necessary above and it is not as close as possible to the camera part, it is impossible to accurately detect the amount of camera shake.

Since camera shake is a problem with camera optical axis tilting, sensors are arranged to detect two vertical and horizontal tilting axes with respect to the optical axis. The translation and rotation of the camera unit can of course cause a blurred image, but it is not affected by the tilting.
The tilting is enlarged as the focal length of the lens increases, and the image is greatly shaken. However, the translation of 1 mm is only 1 mm on the image, and the influence on the image such as 1 mm ahead is small.

  For example, a foldable mobile phone 1 as shown in FIG. 1 has a configuration in which a first housing 2 and a second housing 3 are connected to a connecting portion so that the camera module 4 can be folded. When the shake detection sensor is arranged on the body 2 side and the shake detection sensor is arranged on the second housing 3 side, in the states of FIGS. 1A and 1C, the plus and minus directions of the shake detection signal of the shake detection sensor Will be reversed and accurate blur correction cannot be performed. In addition, in the state of FIG. 1 (B), one-way tilt cannot be detected.

  An object of the present invention is to provide an imaging apparatus capable of optimal blur correction even when an imaging unit and a shake detection sensor are not integrated.

  In order to achieve the above object, an imaging apparatus according to the present invention is connected to a first housing and the first housing by a connecting portion, and the connecting portion has a relative position with respect to the first housing. A variable second housing, a first imaging unit provided in the first housing and having a predetermined shooting direction, a shake detection sensor provided in the first housing, and the second In the case of shooting with the second imaging unit provided in the casing and capable of shooting in a shooting direction different from the predetermined shooting direction, and the first imaging unit provided in the first casing When the camera shake correction is performed by the blur detection sensor provided in the first casing and the second imaging unit provided in the second casing is used for shooting, the first casing is used. And a shake correction unit that performs shooting shake correction by the shake detection sensor provided on the body.

  Preferably, the shake detection sensor is disposed in the vicinity of the first imaging unit and detects information corresponding to a shake amount in at least a two-dimensional direction perpendicular to the predetermined imaging direction.

  Preferably, the shake detection sensor is disposed at a position away from the first imaging unit with respect to the connection unit, and information corresponding to a shake amount in at least a two-dimensional direction perpendicular to the predetermined direction. Is detected.

  Preferably, the camera further includes relative position detection means for detecting a relative positional relationship between the first casing and the second casing, and the blur correction means detects the blur by the relative position detection means. The output of the sensor is corrected to correct shooting blur caused by the second imaging unit.

  Preferably, the blur correction unit transmits information corresponding to a blur amount in the two-dimensional direction perpendicular to the predetermined shooting direction based on the relative position information by the relative position detection unit to the second imaging unit. Is converted into information corresponding to a shake amount in another two-dimensional direction perpendicular to the shooting direction, thereby correcting the output of the shake detection sensor.

  According to the present invention, it is possible to provide an imaging apparatus capable of performing optimal shake correction.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

  2A and 2B are diagrams showing a first embodiment of an imaging apparatus according to the present invention.

  2 is configured as a camera module, and includes a lens unit 11, an image sensor 12, a drive circuit 13 of the image sensor 12, an image signal processing LSI 14, angular velocity sensors 15a and 15b, and a shake correction processing LSI 16. is doing.

In the image pickup apparatus 10, a shake correction circuit is included in the lens unit 11, and angular velocity sensors 15a and 15b as shake detection sensors are arranged on the same substrate as the image pickup element.
Hereinafter, the basic configuration and function of the camera shake correction device and the reason for adopting the configuration in the present embodiment will be described, and then the specific configuration of the imaging device will be described in order.

FIG. 3 is a block diagram showing a basic configuration of the camera shake correction apparatus.
This camera shake correction device 20 includes a shake detection sensor 21 that detects a shake amount, a filter 22 that extracts a necessary frequency component from the output of the shake detection sensor 21, an amplifier 23 that adjusts the level of the output signal, and a shake correction circuit from the shake signal. The main component is a correction amount calculation circuit 24 that calculates the amount of actuation and a shake correction circuit 25 that actually corrects the shake.
Although not shown, an analog / digital converter (ADC) or the like for converting a blur signal or the like into a digital signal is also provided.

FIG. 4 is a diagram for explaining camera shake.
As shown in FIG. 4, camera shake is generated by rotation about a two-dimensional direction perpendicular to the photographing direction, specifically, two axes X and Y on a plane orthogonal to the optical axis OX of the camera CMR. .
It is the rotation of X and Y that greatly affects the photograph as blur. The horizontal movement of X and Y, or the rotation around the optical axis, of course, also affects the blur, but does not affect the extent of the rotation of X and Y.
The X and Y rotations are magnified according to the focal length of the lens and are enlarged to give a large blur to the image. However, a 1 mm movement due to parallel movement or rotation is only 1 mm on the image, for example, 1 mm ahead 2 m, etc. The effect on the image is small. The telephoto lens is more susceptible to camera shake.
In order to correct the rotations of X and Y, two processing systems are required. However, since the processing is the same, FIG. 2 shows only a single-axis processing system.

In general, the shake detection sensor 21 is often an angular velocity sensor.
The correction amount calculation circuit 24 is a PID controller that performs feedback correction.
There are various types of blur correction circuits 25, an electronic type and an optical type. Here, the case of an optical correction unit will be described.
In this method, the entire photographic lens or a part thereof is moved in the X and Y planes to eliminate blurring. Therefore, as shown in FIG. 5, the blur correction circuit 25 includes a driving actuator (here, voice coil motors 251 and 252), a driving circuit 253, lens position detection means (here, Hall elements) 254 and 255, and a magnet 256. , 257.

Taking a digital camera as an example, in order to correct the camera shake accurately, the relationship between the image pickup image sensor 12 of the camera, the angular velocity sensors 15a and 15b, and the driving direction of the correction optical system must be correctly orthogonal.
In the case of a box-type compact camera with a lens and a single-lens reflex camera with interchangeable lenses, the relationship between the taking lens (correction optical system) and the image sensor is inevitably set correctly so that the positional relationship is properly established. The detection sensor is also configured so that the positional relationship can be easily obtained correctly.

However, in the camera 30 of the type in which the camera unit portion rotates as shown in FIG. 6 and the camera module 41 mounted in the foldable mobile phone 40 as shown in FIG. Since the angle relationship varies depending on the user's usage from time to time, there is a shift in the relationship between the sensor that detects the amount of blur, the image sensor for shooting, and the shooting optical system, and the amount of camera shake detected by the sensor actually occurs in the camera unit. There is a possibility that the amount of blurring is shifted and optimal blur correction cannot be performed.
For example, in FIGS. 8A, 8B, and 8C, the angles of the imaging portion and the grip portion of the camera are different from each other. However, when an angular velocity sensor is disposed in the grip portion, the angular velocity sensor is in FIG. It operates correctly in the relationship of B), the sensitivity is reduced by the angle shift in FIG. 8A, and it cannot be detected in FIG. 8C.
Therefore, in the present embodiment, the configuration shown in FIG. 2 and the configuration described later are adopted.

  As described above, the imaging device (camera module) 10 in FIGS. 2A and 2B includes the lens unit 11, the image sensor 12, the drive circuit 13 of the image sensor 12, the image signal processing LSI 14, and the angular velocity sensors 15a and 15b. And a shake correction processing LSI 16.

  In the imaging apparatus 10, the shake correction circuit is included in the lens unit 11 and is an optical correction type that uses the voice coil actuator of FIG. 5. Further, the image sensor 12 is not visible because it is disposed under the lens unit 11 in FIG.

The angular velocity sensors 15a and 15b are placed so as to be orthogonal to each other, and are arranged substantially parallel to the long side and the short side of the image sensor 12.
In this embodiment, in order to maintain the relationship between the angular velocity sensors 15a and 15b and the image sensor 12, they are arranged on the same substrate.
As shown in FIGS. 9A to 9C, the arrangement position is sufficient if the relationship between the orthogonality of X and Y of the angular velocity sensors 15a and 15b and the relationship with the image sensor 12 is maintained. The layout is determined when designing the board in consideration of the wiring of the circuit.

  The blur correction processing LSI 16 is an LSI in which a filter circuit, a signal amplification circuit, an AD converter for digitizing a blur signal and a Hall element signal, a Hall element drive circuit, a PID controller, a blur correction, and a drive circuit are integrated into one chip. . The cut-off frequency of the filter, the control parameters of the PID controller, etc. can be set from the outside.

The output signals of the angular velocity sensors 15a and 15b are processed as analog signals until filtering and signal amplification, and then converted into digital data by an AD converter, and the PID controller processes them by digital calculation.
First, after AD conversion, digital filter processing and digital amplification may all be performed by digital signal processing.

The correction drive is a bridge circuit that drives the voice coil motor in the forward and reverse directions, and its control changes the driving force by PWM drive as shown in FIGS. 10 (A) and 10 (B). The driving direction is reversed when the motor signal M1 is high and the motor signal M2 is HIGH.
The drive circuit may not be a PWM drive type but may be a circuit for controlling the applied voltage level or the applied current.
The power of the camera module of this embodiment is supplied from another part of the portable device. In addition, as a minimum configuration of the camera module, at least the lens unit 11, the image sensor 12, and the angular velocity sensors 15a and 15b need to be arranged on the same substrate.

  FIG. 11 is a processing flow related to blur correction of the imaging apparatus (camera module) according to the first embodiment.

The outputs of the angular velocity sensors 15a and 15b are filtered (ST101), amplified (ST102), and the angular velocity signal is AD converted to obtain blur signal data SIGB (ST103). Further, the Hall element signal is also AD converted to obtain a signal SIGH (ST104).
As shown in the following equation, SIGB is multiplied by conversion coefficient S2H to obtain SIGM (ST105).

    SIGM = SIGB × S2H + CVAL

The conversion coefficient S2H is a coefficient for converting the angular velocity signal output to the output of the Hall element indicating the position of the correction optical system, and SIGM is the target position of the correction optical system.
The CVAL is controlled to the neutral position when the angular velocity signal is zero at the time corresponding to the neutral position of the correction member.

In order to perform PID control, an integral SIGI of deviation SIGP1 and a differential SIGD of deviation are calculated from the target position SIGM and the current position SIGH (ST106).
As shown in the following equation, SIGC is obtained by multiplying the calculated values by feedback coefficients Kp, Ki, and Kd and adding them (ST107).

  SIGC = Kp × SIGP + Ki × SIGI + Kd × SIGD

SIGC is a control value, but actual drive is controlled by PWM drive, so it is replaced with the pulse width of PWM and further multiplied by coefficient Kpwm to obtain a PV value for direct conversion to a timer value for counting the pulse period (ST108).
By setting PV in the timer, driving is performed with a predetermined pulse width (ST109), and the control device moves to the control device. The processing of step 107 and various constants are determined so as to achieve optimal control.

This flow is an example, and other methods may of course be used.
The correction optical system is driven so that this flow is periodically performed every 1 ms, continuously corrected, and the generated blur is eliminated. This period is determined by system requirements. The shorter the cycle, the better the correction capability, and the longer the cycle, the lower the correction capability.

  Next, a second embodiment will be described.

FIG. 12 is a diagram showing a second embodiment of the imaging apparatus according to the present invention.
As shown in FIG. 12, the imaging device 50 is configured as a foldable mobile phone (partially perspective view).

  As shown in FIG. 12, the cellular phone 50 has a configuration in which a first casing 51 and a second casing 52 are connected to a connecting portion 53 so as to be foldable. In addition, a folding angle detection unit 54 is disposed in the connection unit 53. Reference numeral 55 denotes an antenna.

The first casing 51 includes a built-in first camera unit 511 as a first imaging unit, a microphone 512, a digital signal processing circuit (DSP) 513 including a shake correction system, angular velocity sensors 514a and 514b, and a numeric keypad. And a key operation unit 515 including a photographing key (shutter button) and the like.
The second casing 52 is provided with a built-in second camera unit 521 as a second imaging unit, a speaker 522, and a display panel 523 such as a liquid crystal.

As described above, in the second embodiment, the first housing 51 is provided with the first camera module 511 that is the first imaging unit and the angular velocity sensors 514a and 514b that are the shake detection sensors. In the second casing 52, a second camera section 521 capable of capturing an image in a different direction from the first camera section 511 of the first casing 51 is disposed.
In the shake correction system included in the DSP 513, the shake of the first camera unit 511 and the shake of the second camera unit 521 can be selectively corrected.

In other words, in the second embodiment, when the second camera unit 521 captures an image with the camera shake correction system, depending on the position and orientation of the second camera unit 521, what is the correction for the camera shake detected by the first camera unit 511? It is necessary to correct in the reverse direction. It is possible to perform correction (calculate a value) by switching between the shake correction of the first camera unit 511 and the shake correction of the second camera unit 521.
Here, the case where the imaging direction (which can be defined also in the optical axis direction) is different means that the first casing 51 or the second casing 52 is opened, closed, rotated (opened), slide (oblique), and slide rotation. Many cases exist in the case of (closed state).
The shake correction system of the present embodiment includes a correction value calculation circuit that calculates a correction value for correcting the position of the imaging unit based on the shake value. The first and second correction values are calculated based on the correction values calculated by the correction calculation circuit described above. The shake correction circuit (25) that corrects the position of the second camera unit can correct the shake.

Furthermore, the correction direction changes depending on the open / close / rotation state (angle), and the calculation of the distance to be corrected as described below also requires adjustment according to the angle.
Correspondingly, in the case of the folding type (opening / closing type) as in the present embodiment, the angle detection unit 54 detects an angle formed by the shake detection sensor and the second camera unit 521 via the connection unit 53 (hinge). Is configured to do.
The distance from the angular velocity sensors 514a and 514b serving as shake detection sensors to the connecting portion (hinge portion) 54 and the distance from the second camera portion 521 to the connecting portion (hinge portion) 53 are adjusted by the detection angle of the angle detecting portion 54. It is configured as follows.
Further, the correction direction of the second camera unit 521 changes depending on the detection angle. In other words, the correction amount (movement amount) varies depending on the distance and angle.
In the present embodiment, shutter buttons are arranged in either (both) housings. This is because blurring often occurs with the shutter button as a fulcrum (center).
In the present embodiment, the distance from the camera unit to be used to the shot button, the distance from the angular velocity sensors 514a and 514b, which are shake detection sensors, to the shutter button, the camera unit from the shot button, and the shake detection sensor from the shot button. The blur correction value similar to the above is adjusted in accordance with the angle formed by.

In the present embodiment, the angular velocity sensors 514a and 514b are arranged in the vicinity of the first camera unit 511. This is because the blur correction of the first camera unit 511 can be performed more accurately.
In the present embodiment, it is desirable that the angular velocity sensors 514 a and 514 b be arranged at positions farther from the first camera unit 511 than the connection unit (hinge unit) 53.
This is because the amount of movement (blur) is larger than the vicinity of the connecting portion (hinge portion) 53, so that it is easy to detect the blur, and when the correction amount is calculated based on the detected detection value, the error is small (absorbed). )

  The configuration of the mobile phone 50 having the above functions will be described more specifically.

  FIGS. 13A and 13B are configuration diagrams of the camera units 511 and 521, which include a photographing lens 61, an image sensor 62, a drive circuit 63 of the image sensor 62, an image signal processing LSI 64, and a shake correction drive circuit 65. ing.

  In this embodiment, as shown in FIG. 12, the angular velocity sensors 514a and 514b are arranged on the key operation unit 515 side of the folding structure. This is the case where it is arranged on this side from the mounting space. The angular relationship between the angular velocity sensor and the built-in camera module is determined by the angle of the hinge portion 53. There is a maximum opening angle by design, but the user is free to decide where to stop between the fully folded state and the maximum opening angle.

The angle of the hinge is detected by an angle detection brush attached to the connecting portion (hinge portion) 53. Since the generated voltage changes as the brush slides on the resistance pattern, it is AD-converted and captured. Another method may be used as long as the opening angle of the device can be detected. For example, an element that detects a magnetic pattern such as an MR sensor may be used, or an angle sensor may be arranged on each of the built-in module side and the operation unit side to take a difference between the detection angles.
The detected values of the angular velocity sensors 514a and 514b for shake detection are corrected with the detected opening angle.
As in the example of FIG. 14, the angular velocity sensor 514 has the maximum sensitivity with respect to the angular velocity rotating around the axis a in the sensor long side direction, and has no sensitivity to the rotation of the axis b.
Therefore, with the arrangement of the angular velocity sensors as shown in FIG. 12, the angular deviation of the detection result of the angular velocity sensor 514a with respect to the second camera unit 521 is larger than the detection result of the angular velocity sensor b, and the influence of the detection error is larger. .
The angular velocity VO detected by the angular velocity sensor 514b is converted into an angular velocity VOC corresponding to the position of the second camera unit 521 by the following equation.

VOC = VO / SIN (θ−90 °) Equation 1
VO: Angular velocity sensor detected angular velocity
VOC: Built-in camera module position equivalent angular velocity
θ: Detection opening angle

  As can be seen from Equation 1, when the device is flattened, the opening angle is 180 degrees. Therefore, the angular velocity detected by the angular velocity sensor can be regarded as a shake generated in the built-in camera module. When the device is opened at an angle of 90 degrees, the output result of the angular velocity sensor 514b does not indicate camera shake but only indicates rotation on the camera surface.

  Further, when the opening angle becomes narrower, the result of Equation 1 becomes a minus sign, and the signal output of the angular velocity sensor and the direction of occurrence of shaking are reversed. Therefore, in this case, the driving direction of the shake correction member is reversed. When completely folded, θ = 0 and SIN (θ−90 °) in Equation 1 = 11, so that the angular velocity sensor detection amount remains the same and the blur direction is reversed.

  In this example, the angular velocity sensor 514b needs to be corrected depending on the angle with the camera unit. If the other sensor is arranged to be affected, the sensor or both of the sensors are replaced. There may be arrangements that must be corrected.

  FIG. 15 is a processing flow of blur correction in the second embodiment.

  The output of the angular velocity sensor is filtered (ST120), amplified (ST121), and the angular velocity signal is AD converted to obtain blur signal data SIGB (ST122). Further, the Hall element signal is also AD-converted to obtain SIGH (ST123). Next, the brush voltage of the connecting portion (hinge portion) 53 is AD converted (ST124), and the hinge angle 0 is calculated from the brush voltage (ST125).

SIGB / SIN (θ−90 °) is calculated for hinge angle correction, and SIGB2 is obtained (126).
At this time, the sign of SIGB2 changes from SIGB according to the hinge angle.
SIGB2 is multiplied by conversion coefficient S2H to obtain SIGM (ST127). The conversion coefficient S2H is a coefficient for converting the angular velocity signal output into a Hall element output corresponding to the position of the correction optical system, and SIGM is the target position of the correction optical system.

In order to perform PID control, an integral SIGI of deviation SIGP1 and a differential SIGD of deviation are calculated from the target position SIGM and the current position SIGH (128).
SIGC is obtained by multiplying the calculated values by feedback coefficients Kp, Ki, Kd and adding them (ST129).
SIGC is a control value, but the actual drive is controlled by PWM drive, so it is replaced with the PWM pulse width and further multiplied by a coefficient Kpwm to obtain a PV value for direct conversion to a timer value for counting the pulse period (ST130).
By setting PV in the timer, driving is performed with a predetermined pulse width (ST131), and the control position is moved.
The feedback control is an example, and various methods can be adopted as an automatic control method such as PID control as in the first embodiment.
Although the hinge angle correction calculation is performed on the angular velocity sensor output in the embodiment, it is sufficient that the correction is finally made up to the shake correction member. Therefore, even if the correction calculation is performed on the movement amount of the shake correction member. It may be good or may be performed during the correction calculation.

  Next, a third embodiment will be described.

Some angular velocity sensors have a large error when the angle between the detection axis of the sensor and the camera unit is too large, and correction by Equation 1 is difficult.
In that case, the range of the angle where the amount of shake cannot be detected correctly is displayed to stop the operation of the shake correction device and inform the user of the state.

  FIG. 16 is a diagram informing the user that “the shake correction is stopped” that the shake correction device is stopped on the display panel of the mobile phone. In addition to notifying in this way, symbols may be used.

FIG. 17 is a processing flow of blur correction according to the third embodiment.
As an example, the range where the hinge angle is 90 ° ± 45 ° is set as the undetectable range.

  The output of the angular velocity sensor is filtered (ST220), amplified (ST221), and the angular velocity signal is AD converted to obtain blur signal data SIGB (ST222). Furthermore, the Hall element signal is also AD-converted to obtain SIGH (ST223). Next, the brush voltage of the connecting portion (hinge portion) 53 is AD converted (ST224), and the hinge angle 0 is calculated from the brush voltage (ST225).

It is determined whether the hinge angle is within 90 ° ± 45 ° (ST226). If it is within 90 ° ± 45 °, the angular velocity sensor output cannot be corrected correctly, so SIGB = 0 and dispfg = 1, and the process proceeds to processing ST229 (ST228). dispfg is a flag indicating that the shake correction circuit has stopped the correction operation, and display is performed based on this flag.
In process ST229, since the angular velocity signal output is zero, the driving amount is calculated so that the correction member stops at the neutral position. When the hinge angle is outside 90 ° ± 45 °, the above formula 1 can be applied. Therefore, SIGB / SIN (θ−90 °) is calculated to correct the hinge angle to obtain SIGB2 (ST227). At this time, the sign of SIGB2 changes from SIGB according to the hinge angle.
SIGB2 is multiplied by conversion coefficient S2H, and CVAL is added to obtain SIGM (ST229). SIGM is the target position of the correction optical system.
In order to perform PID control, the deviation SIGP, the deviation integral SIGI, and the deviation differential SIGD are calculated from the target position SIGM and the current position SIGH (ST230).
SIGC is obtained by multiplying the calculated values by feedback coefficients Kp, Ki, and Kd and adding them (ST231).
SIGC is a control value, but actual drive is controlled by PWM drive, so it is replaced with the pulse width of PWM and further multiplied by coefficient Kpwm to obtain a PV value for direct conversion to a timer value for counting the pulse period (ST232).
By setting PV in the timer, driving is performed with a predetermined pulse width (ST233), and the control position is moved. Various constants are determined so as to achieve optimum control. Similarly, in the third embodiment, various methods can be adopted as automatic control methods such as PID control.

Similarly, the hinge angle correction calculation is performed on the angular velocity sensor output in the embodiment. However, since it is sufficient that the correction is finally made up to the shake correction member, the correction calculation is performed on the movement amount of the shake correction member. Alternatively, it may be performed during the correction calculation.
As described above, according to the present invention, shake detection and correction are reliably performed.

It is a figure for demonstrating the conventional subject. 1 is a diagram illustrating a first embodiment of an imaging apparatus according to the present invention. It is a block diagram which shows the basic composition of a camera shake correction apparatus. It is a figure for demonstrating camera shake. It is a figure which shows the structural example of a blurring correction circuit. It is a figure which shows the camera of the type which a camera unit part rotates. It is a figure for demonstrating the general camera module mounted in the foldable mobile telephone. It is a figure for demonstrating the point which should improve the general camera module. It is a figure which shows the example of arrangement | positioning of an angular velocity sensor. It is a figure which shows the example of a drive pulse. It is a processing flow regarding blur correction of the imaging apparatus (camera module) according to the first embodiment. It is a figure which shows 2nd Embodiment of the imaging device which concerns on this invention. It is a figure which shows the structure of the camera module of the imaging device of FIG. It is explanatory drawing regarding the sensitivity of an angular velocity sensor. It is a processing flow of blur correction in the second embodiment. FIG. 10 is a diagram informing the user that “the shake correction is stopped” that the shake correction device is stopped on the display panel of the mobile phone; It is a processing flow of blur correction in the third embodiment.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 50 ... Cellular phone, 51 ... 1st housing | casing, 511 ... 1st camera part, 512 ... Microphone 512, 513 Digital signal processing circuit (DSP) 513, 514a, 514b ... Angular velocity sensor, 515 ... Key operation unit, 52 ... second housing, 521 ... second camera unit, 522 ... speaker, 523 ... display panel, 53 ... connection unit, 54 ... angle detection unit, 55 ... antenna.

Claims (5)

A first housing;
A second casing that is connected to the first casing by a connecting portion, the relative position of the first casing being variable with respect to the first casing;
A first imaging unit provided in the first housing and having a predetermined shooting direction;
A shake detection sensor provided in the first housing;
A second imaging unit provided in the second casing and capable of photographing in a photographing direction different from the predetermined photographing direction;
When shooting is performed by the first imaging unit provided in the first casing, shooting blur correction is performed by the blur detection sensor provided in the first casing, and the second casing is corrected. An image pickup apparatus comprising: a shake correction unit that performs shooting shake correction by the shake detection sensor provided in the first housing when the second image pickup unit provided in the camera is used for shooting. The imaging apparatus according to claim 1, wherein the blur detection sensor is disposed in the vicinity of the first imaging unit and detects information corresponding to a blur amount in at least a two-dimensional direction perpendicular to the predetermined imaging direction. . The blur detection sensor is disposed at a position away from the first imaging unit with respect to the connection unit, and detects information corresponding to a blur amount in at least a two-dimensional direction perpendicular to the predetermined direction. Item 2. The imaging device according to Item 1. A relative position detecting means for detecting a relative positional relationship between the first casing and the second casing;
The imaging apparatus according to claim 1, wherein the blur correction unit corrects an imaging blur caused by the second imaging unit by correcting an output of the blur detection sensor by the relative position detection unit. The blur correction unit is configured to display information corresponding to the blur amount in the two-dimensional direction perpendicular to the predetermined shooting direction in the shooting direction of the second imaging unit based on the relative position information by the relative position detection unit. The imaging apparatus according to claim 4, wherein the output of the shake detection sensor is corrected by converting the information into information corresponding to a shake amount in another two-dimensional direction perpendicular to the two.

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