JP2006295824A - Portable imaging device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a digital camera including a pedometer function. <P>SOLUTION: The digital camera includes a driver circuit 29 and first and second coils 32a and 32b. The driver circuit 29 causes currents to flow to the first and second coils 32a and 32b, generates electromagnetic power and displaces an imaging element 39 with the electromagnetic power. Thus, the digital camera corrects image shake that occurs in the imaging element 39. Furthermore, the digital camera includes a signal determination circuit 71 and a counter circuit 72. While no current flows from the driver circuit 29 to the first and second coils 32a and 32b, the signal determination circuit 71 detects vibration based on walking on the basis of currents generated by electromagnetic induction in the first and second coils 32a and 32b. The counter circuit 72 counts the number of vibration detected by a detection means as the number of steps. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to an image blur correction apparatus and a portable imaging device having a pedometer function.

  The pedometer counts the number of steps the user has walked, displays the total number of steps on the display, and informs the user of the number of steps walked. In recent years, electronic cameras having a pedometer function have been proposed (see Patent Documents 1 and 2). In such a camera, for example, an angular velocity sensor used for image blur correction detects camera vibration. The vibration frequency is counted as the number of steps.

In the electronic cameras described in Patent Documents 1 and 2, when the camera power is on, the camera can be switched to a normal camera mode and an image can be taken. When the camera power is off, the number of steps is Switch to the counting mode and count the number of steps the user has walked. In such an electronic camera, when the camera mode is for capturing an image, almost the entire camera is operated. On the other hand, when the pedometer mode is selected, some of the cameras used in the pedometer mode are operated. Only the circuit is activated. Thus, when only a part of the circuit is operated in the pedometer mode, the power consumption in the pedometer mode can be reduced.
JP 2000-152054 A JP 2000-121380 A

  However, in the electronic cameras described in Patent Documents 1 and 2, angular velocity information detected by the angular velocity sensor is input to the CPU and processed in the CPU in both the camera mode and the pedometer mode. That is, even when the camera is in the pedometer mode, it is necessary to drive the CPU, so that power consumption in the pedometer mode increases. In addition, in order for the angular velocity sensor to detect the angular velocity, power must be supplied to the angular velocity sensor, so that the power consumption in the pedometer mode is similarly increased. Therefore, in the electronic cameras described in Patent Documents 1 and 2, a pedometer battery is provided to cope with power consumption in the pedometer mode.

  The present invention has been made in view of such problems, and an object thereof is to provide a portable imaging device having a pedometer function that consumes little power when the pedometer function is operating. To do.

  A portable imaging device according to the present invention includes an optical element (for example, an imaging lens) that receives light from a subject and forms the received light as a subject image, and an imaging element that captures the subject image. A portable imaging device capable of displacing at least a part of an optical element or an image sensor to correct a shake, detecting vibration based on walking motion, and counting the number of vibrations as a number of steps. A coil unit disposed displaceably in a magnetic field, a driving unit configured to displace at least a part of the optical element by causing an electric current to flow through the coil unit to generate an electromagnetic force and displacing the coil unit; Detection means for detecting vibration based on walking motion based on the current generated by electromagnetic induction due to the displacement of the coil part when no current is flowing in the part, and detected by the detection means Characterized in that it comprises a counting means for counting the oscillating number as walking steps.

  When the coil unit includes the first and second coils, the detection means performs vibration based on the walking motion based on the first and second currents generated by electromagnetic induction based on the displacements of the first and second coils. It is preferable to detect. Thereby, since walking is judged based on the vibration of 2 directions, walking can be detected more correctly. At this time, for example, when any one of the currents generated in the first and second coils is greater than or equal to a predetermined amount, the detection unit detects the displacement of the coil portion as vibration based on the walking motion.

  The first coil is displaced in a first direction perpendicular to the optical axis of the optical element, and the second coil is displaced in a first direction and a second direction perpendicular to the optical axis, thereby generating a current by electromagnetic induction. It is preferable. More preferably, the first coil is displaced in the first direction and the second coil is displaced in the second direction by electromagnetic force.

  It is preferable to further include a charging unit that charges electric power generated by the displacement of the coil unit when no current is passed from the driving unit to the coil unit. The charged power is preferably used for driving the detection means and the counting means. Thereby, since the detection means and the counting means can be driven without using the main power source, for example, the pedometer function can be operated with little power consumption of the main power source.

  By operating the operation member, the first mode in which the portable imaging device operates as the imaging device and the second mode in which the portable imaging device stops operating as the imaging device are switched. In the second mode, While vibration is detected and the number of walks is counted, in the first mode, the count of the number of walks is stopped. Thereby, in the first mode, the coil section is utilized for driving the optical element, and in the second mode, it is utilized for counting the number of steps. Therefore, the coil portion can be effectively used in any mode.

  A portable video device according to the present invention includes a display unit for displaying an image and a display unit that displays the number of walks on the display unit when the mode is switched from the second mode to the first mode. Thereby, the user can easily grasp the counted number of walks.

  According to the present invention, since the portable imaging device can divert the coil unit used in the image blur correction device to the pedometer, the coil unit is effectively used even when the image blur correction device is not utilized. In addition, since walking is detected based on current generated by electromagnetic induction due to vibration, the number of walks can be counted with little power consumption.

  FIG. 1 is a perspective view of the digital camera 10 according to the present embodiment as viewed from the rear, and FIG. 2 is a front view of the digital camera 10 as viewed from the front. In the digital camera 10, an LCD monitor 17 is provided on a substantially front side on the back side. A power button 11, a correction button 14, and a release button 13 are provided on the back and top surfaces of the digital camera 10. An imaging lens 67 is provided in front of the digital camera 10, and a horizontal direction orthogonal to the optical axis LX of the imaging lens 67 is a first direction x, a vertical direction orthogonal to the optical axis LX, and a vertical direction orthogonal to the first direction. A horizontal direction parallel to the second direction y and the optical axis LX is defined as a third direction z.

  Inside the digital camera 10, an imaging element 39 is provided behind the optical axis LX of the imaging lens 67. The imaging lens 67 receives light from the subject, forms the received light as a subject image, and the imaging element 39 captures the formed subject image as an image. In addition, the digital camera 10 can detect vibration based on walking motion and count the number of vibrations as the number of steps. That is, the digital camera 10 according to the present embodiment has a function as an imaging device and a pedometer function.

  The digital camera 10 according to this embodiment can further displace at least a part of the imaging lens 67 or the imaging element 39 to correct image blur that occurs in the imaging element. In the present embodiment, in order to correct the image blur, the image pickup device 39 is displaced as described later. However, a part (or all) of the image pickup lens 67 may be displaced. The imaging lens 67 may be displaced.

  FIG. 3 shows a circuit configuration diagram of the digital camera of the present embodiment. In the digital camera 10, the on / off state of the power switch 11 a is switched in response to pressing of the power button 11. When the power switch 11a is switched on, power is supplied from the power source Vcc to the CPU 21 and the like, and the entire circuit of the digital camera 10 is driven. When the entire circuit is driven, the digital camera 10 is shifted to a shooting mode and a shooting operation is started. In the photographing mode, the operation of the entire camera is controlled by the CPU 21.

  The digital camera 10 is further provided with power interlocking switches 11b and 11c that are switched in conjunction with on / off switching of the power switch 11a. When the power is turned on, the power interlock switches 11b and 11c connect first and second coils 32a and 32b, which will be described later, to the drive circuit 29. Therefore, in the photographing mode, the first and second coils are supplied from the driver circuit 29. A current can be input to 32a and 32b.

  In the shooting mode, the subject image is picked up as an optical image via the image pickup lens 67 by the image pickup block 22 that drives the image pickup device 39, and the image picked up on the LCD monitor 17 is displayed. Then, when the release button 13 is pressed halfway to turn on the photometry switch 12a, photometry, distance measurement, and focusing are performed, and when fully pressed, the release switch 13a is turned on to take an image. And the captured image is stored in memory.

  The AE unit 23 performs a photometric operation of the subject to calculate an exposure value, and calculates an aperture value and an exposure time necessary for photographing based on the exposure value. The AF unit 24 performs distance measurement, and performs focus adjustment by displacing the imaging lens 67 in the optical axis LX direction based on the distance measurement result.

  In the shooting mode, when the image blur correction button 14 is pressed, the image blur correction switch 14a is turned on, and independently of other operations such as photometry, the image blur correction device 30 is set at regular intervals (for example, 1 ms). Then, the angular velocity detection unit 25 is driven to perform image blur correction.

  As will be described later, the image blur correction device 30 moves the imaging element 39 to the position S to be moved calculated by the CPU 21, thereby eliminating the deviation of the optical axis LX on the imaging surface of the subject image caused by the blur. It is a device that corrects image blur while keeping the image and the image plane position constant. The image blur correction device 30 includes a fixed portion 30b fixed to the camera body of the digital camera 10, and a movable portion 30a that can be displaced in the first direction x and the second direction y with respect to the fixed portion 30b. The image sensor 39 is fixed to the movable part 30a, and can move according to the displacement of the movable part 30a.

  The fixed portion 30b is provided with U-shaped first and second yokes 43a and 43b in which a permanent magnet (not shown) is provided inside the recess (see FIG. 4). First and second coils 32a and 32b are fixed to the movable portion 30a, and the first and second coils 32a and 32b are disposed in the recesses of the first and second yokes 43a and 43b, respectively. Is placed in a predetermined magnetic field. When a current flows, the first and second coils 32a and 32b displace the movable portion 30a in the first direction x and the second direction y, respectively, by electromagnetic force.

  The angular velocity detection unit 25 includes first and second angular velocity sensors 26 and 27 and an amplifier / high pass filter circuit 28. The first and second angular velocity sensors 26 and 27 detect the angular velocities of the first direction x and the second direction y every predetermined time (1 ms) of the digital camera 10, respectively. The amplifier / high-pass filter circuit 28 amplifies the signal related to the angular velocity, cuts the null voltage and panning of the first and second angular velocity sensors 26 and 27, and outputs an analog signal as the first and second angular velocities vx and vy of the CPU 21. Input to A / D0 and A / D1.

  In the CPU 21, after the A / D conversion is performed on the first and second angular velocities vx and vy input to A / D0 and A / D1, an image generated in a certain time (1 ms) by a conversion coefficient considering the focal length and the like. The amount of shake is calculated. In the CPU 21, the target position S to be displaced of the image sensor 39 corresponding to the image blur amount obtained by the calculation is calculated for each of the first direction x and the second direction y. Here, the target position to be displaced in the first direction x is sx, and the target position to be displaced in the second direction y is sy.

  The CPU 21 calculates the driving force necessary for displacing the image sensor 39 (movable part 30a) at the target positions sx and sy, respectively. The necessary driving force is output from the PWM0 and PWN1 of the CPU 21 to the driver circuit 29 as the first and second PWM duties dx and dy, respectively. In the driver circuit 29, currents are input to the first coil 32a and the second coil 32b in accordance with the first and second PWM duties dx and dy, respectively, and thereby the movable portion 30a, that is, the image sensor 39 is displaced.

  The first and second Hall elements 44a and 44b detect displacement amounts of the movable portion 30a (the image sensor 39) in the first direction x and the second direction y, respectively. The detected displacement is input to the A / D2 and A / D3 of the CPU 21 as the position detection signals px and py via the first and second Hall element signal processing circuits 45a and 45b, and is A / D converted. . The CPU 21 calculates displacement amounts ldx and ldy of the image sensor 39 in the first and second directions x and y based on the A / D converted position detection signals px and py.

  The first and second PWM duties dx and dy are PID controlled by the target positions sx and sy and the displacements ldx and ldy. Therefore, the currents input to the first and second coils 32a and 32b are controlled so as to be displaced to the target positions sx and sy while referring to the displacement amounts detected by the Hall elements 45a and 45b.

  When the power switch 11a is switched from the on state to the off state, the supply of power to the CPU 21 is stopped, the digital camera 10 stops operating as an imaging device, and shifts from the photographing mode to the pedometer mode. In the pedometer mode, the first and second coils 32a and 32b are connected to the counter IC 70 by the power supply interlocking switches 11b and 11c described above, and are vibrated as described later using the first and second coils 32a and 32b. Is detected and the number of steps is counted. The counter IC 70 includes a signal determination circuit 71 and a counter circuit 72.

  The configuration of the movable part 30a and the fixed part 30b of the image blur correction apparatus will be described in more detail with reference to FIGS. The movable portion 30a includes first and second coils 32a and 32b, first and second hall elements 44a and 44b, and a plate on a surface of the movable substrate 49a perpendicular to the third direction z on the imaging lens 67 side. 64a is fixed and configured. A stage 145 is further provided on the plate 64a, and the image pickup device 39, the pressing portion 138, and the optical low-pass filter 139 are sandwiched and urged by the stage 145 and the plate 64a, whereby the movable substrate 49a is placed on the movable substrate 49a. The image sensor 39 and the optical low-pass filter 139 are fixed. The stage 145 is provided with first and second horizontal movement bearings 52a and 52b.

  The fixed portion 30b is configured by providing first and second yokes 43a and 43b and first to fourth vertical movement bearing portions 51a to 51d on a base plate 65b. The movable portion 30a is supported by the fixed portion 30b via the moving shaft 50 so as to be displaceable. The moving shaft 50 has a U-shape when viewed from the third direction z, and extends in parallel with each other in the first direction x, and one end portion of each of the shafts 50a and 50b. The third shaft 50c is connected to each other and extends in the second direction y.

  The first and second shafts 50a and 50b are movably inserted in horizontal movement bearing portions 52a and 52b provided in the movable portion 30a, whereby the movable portion 30a is relative to the fixed portion 30b. In addition, it can be displaced in the first direction x. The third shaft 50c is movably inserted in first and second vertical movement bearings 51a and 51b provided on the fixed portion 30b, so that the movable portion 30a is relative to the fixed portion 30b. In addition, it can be displaced in the second direction y. The other ends of the shafts 50a and 50b that are not connected to the third shaft 50c can be displaced in the first direction x and the second direction y by the third and fourth vertical movement bearing portions 51c and 51d. It is supported by.

  The first and second coils 32a and 32b are fixed to the right end and the upper end in FIG. 5 on the movable substrate 49a, and the first and second coils 32a and 32b are each perpendicular to the third direction z. It is a sheet-like flat coil in which a conducting wire is wound along the surface. The first and second yokes 43a and 43b fixed to the fixing portion 30b have a U-shape when viewed from the second direction y and the first direction x, respectively. The first and second coils 32a and 32b are disposed in the recesses of the first and second yokes 43a and 43b, and the first and second coils are positioned at positions facing the first and second coils 32a and 32b. Permanent magnets 41a and 41b are fixed. The first and second permanent magnets 41a and 41b have N and S poles arranged in the first direction x and the second direction y, respectively. That is, the first and second coils 32a and 32b are disposed in the magnetic field formed by the first and second permanent magnets 41a and 41b, respectively.

  The coil pattern of the first coil 32a is to displace the movable part 30a including the first coil 32a in the first direction x by an electromagnetic force generated from the direction of the current of the first coil 32a and the direction of the magnetic field of the first magnet 41a. It has a line segment parallel to the second direction y. The coil pattern of the second coil 32b is such that the movable part 30a including the second coil 32b is displaced in the second direction y by the electromagnetic force generated from the direction of the current of the second coil 32b and the direction of the magnetic field of the second magnet 41b. It has a line segment parallel to the first direction x.

  With such a configuration, when a current is passed from the driver circuit 29 to the first coil 32a in the photographing mode, an electromagnetic force in the first direction x acts on the first coil 32a, and the first coil 32a becomes the base substrate 49a. At the same time, it is displaced in the first direction x. Similarly, when a current is passed from the driver circuit 29 to the second coil 32b, an electromagnetic force in the second direction y is applied to the second coil 32b, and the base substrate 49a is moved in the second direction y together with the second coil 32b. Displace.

  On the other hand, when the digital camera 10 is in the pedometer mode, since the first and second coils 32a and 32b are connected to the counter IC 70 as described above, no current is supplied from the driver circuit 29. In this state, when the digital camera 10 is displaced and the movable portion 30a is displaced in the first direction x relative to the fixed portion 30b, a current is generated in the first coil 32a due to electromagnetic dielectric. To do. Similarly, when the digital camera 10 is displaced and the movable portion 30a is displaced in the second direction y relative to the fixed portion 30b, a current is generated in the second coil 32b by electromagnetic dielectric. With the above configuration, in the present embodiment, the digital camera 10 is carried by a pedestrian and vibrates in accordance with the walking motion. For example, the movable portion 30a is in the first direction x (left and right in FIG. 4) with respect to the fixed portion 30b. If a relative vibration occurs, an alternating current is generated in the first coil 32a. Similarly, when the movable portion 30b vibrates in the second direction y (up and down in FIG. 4), an alternating current is generated in the second coil 32b.

  A circuit diagram of the first and second coils 32a and 32b and the counter IC 70 is shown in FIG. As shown in FIG. 6, in the pedometer mode, the first coil 32a is connected to the counter IC 70 and the capacitor C11 via the rectifier circuit 73a. The second coil 32a is connected to the counter IC 70 and the capacitor C12 via the rectifier circuit 73b. The rectifier circuits 73a and 73b are full-wave rectifier circuits in which four diodes are connected in a bridge shape.

  The alternating current generated in the first coil 32a is sent to the rectifier circuit 73a and full-wave rectified, and the full-wave rectified current is charged in the capacitor C11. The power charged in the capacitor C11 is sent to the counter IC 70, and the capacitor C11 is used as a power source for the counter IC 70 (that is, the signal determination circuit 71 and the counter circuit 72). The current rectified by the rectifier circuit 73a is input to the counter IC 70 as a first vibration determination signal after a small amount of AC component is removed by the DC cut capacitor C21.

  The AC current generated in the second coil 32b is similarly charged to the capacitor C12 via the rectifier circuit 73b. The charged power is similarly supplied to the counter IC 70. Further, it is input to the counter IC 70 as the second vibration determination signal via the rectifier circuit 73b and the DC cut capacitor C21.

  In the counter IC 70, the signal determination circuit 71 receives the first and second vibration determination signals, and determines whether the vibration is based on walking based on the first and second vibration determination signals. The counter circuit 72 includes a counter. When the signal determination circuit 71 determines that the vibration is based on walking, the counter circuit 72 counts the vibration as the number of walks, and stores the counted number of walks in the counter.

  In the present embodiment, power supply interlocking switches 11d and 11e that are switched on and off in conjunction with the on / off of the power switch 11a are further provided. The power supply interlocking switches 11d and 11e are turned on when the power switch 11a is turned on, and connect the capacitors C11 and C12 to the power supply Vcc. That is, the capacitors C11 and C12 are charged with power from the power supply Vcc when the power switch 11a is in the on state.

  A determination method in the signal determination circuit 71 will be described with reference to FIG. When a walking motion is performed and the movable part 30a vibrates in the x and y directions with vibration displacement amounts x1 and y1, respectively, AC currents X1 and Y1 having magnitudes corresponding to the amplitude displacement amounts x1 and y1 are generated by electromagnetic induction. It occurs in the first and second coils 32a, 32b. The alternating currents X1 and Y1 are full-wave rectified by the rectifier circuits 73a and 73b, and are input to the signal determination circuit 71 as first and second vibration determination signals X2 and Y2 that are full-wave rectified waves. It should be noted that in the walking motion, the vertical movement is accompanied at every step, and the movable portion 30a is vibrated once according to the vertical movement of the one step. Therefore, one step in the walking motion corresponds to one cycle of the alternating currents X1 and Y1, that is, two waves of the first and second vibration determination signals X2 and Y2, which are full-wave rectified waves.

  Here, it is unclear in which direction the digital camera 10 is carried by a pedestrian. If there is a case where the digital camera 10 is significantly vibrated only in the first direction x, the digital camera 10 is remarkably vibrated only in the second direction y. There is also a case. Further, there is a case where the vibration vibrates greatly in two directions (first and second directions x, y). Therefore, the number of walks should be counted in consideration of not only vibration in one direction (for example, x direction) but also vibration in two directions (x and y directions). Further, the height (each local maximum value) of each wave of the full-wave rectified wave is proportional to the magnitudes of the vibration displacement amounts x1 and y1. Therefore, in the present embodiment, the presence or absence of vibration due to walking is determined based on the full-wave rectified wave of the two vibration determination signals X2 and Y2, and the number of walks is counted.

Specifically, the heights (maximum values) X _Mmax and Y _Mmax of one wave (X _M1 and Y _M1 in FIG. 7) of the first and second vibration determination signals X2 and Y2 generated at the same timing are signals. In the determination circuit 71, the higher one wave (X _M1 or Y _M1 ) is selected, and the height (X _Mmax or Y _Mmax ) of the selected one wave is compared with a threshold value. If the height (X _Mmax or Y _Mmax ) is greater than or _equal to the threshold value, the digital camera 10 vibrates greatly in at least one of the first and second directions x and y, and thus vibration occurs due to walking. The count signal is input from the signal determination circuit 71 toward the counter circuit 72. The counter circuit 72 is provided with a counter (not shown), and when the count signal is input, the count number of the counter is incremented.

  The count number of the counter continues to be counted when the power switch 11a is in the OFF state, and the count number continues to increase as the number of walks increases. When the power switch 11a is switched from the off state to the on state, the count is stopped and the count number of the counter is read by the CPU 21 and displayed on the LCD monitor 17. Here, since the count number is incremented for every wave of the full-wave rectified wave, it is incremented by 2 when the movable portion 30a vibrates once by one step of walking. Accordingly, the count number of the counter is displayed on the LCD monitor 17 after being multiplied by ½. The count number of the counter is cleared to 0 after being read by the CPU 21. Thereby, when the power switch 11a is turned off again, the count of the number of walks is started from zero.

  In the present embodiment, a bridge-type full-wave rectifier circuit is used as the rectifier circuits 73a and 73b, but a half-wave rectifier circuit including one diode may be used. However, in this case, the electric power stored in the capacitors C11 and C12 is half that in the case where a bridge-type full-wave rectifier circuit is used. Further, since the count number counted by the count circuit 72 matches the number of walks, the count number is not multiplied by 1/2 but is displayed as it is on the LCD monitor 17.

In the present embodiment, one wave having the larger height of each wave of the full-wave rectified wave generated at the same timing (X _M1 and Y _M1 in FIG. 7) is selected, and the height of the selected one wave ( X _Mmax or Y _Mmax ) is compared with the threshold value, but the arithmetic mean value of these heights X _Mmax and Y _Mmax is compared with the threshold value to determine whether or not vibration has occurred due to walking. good. Moreover, Z shown by Formula (1) may be compared with a threshold value.
Z = (X _Mmax ² + Y _Mmax ² ) ^1/2 ... (1)

  Since the digital camera 10 is rarely vibrated in the thickness direction (the third direction z) when carried by a pedestrian, the number of walks is almost the same without detecting vibration in the z direction. It is detected accurately.

  A routine in the digital camera 10 of this embodiment will be described with reference to FIGS. FIG. 8 is a routine showing the operation of the counter IC 70 in the pedometer mode. When the power switch 11a is switched from the on state to the off state, the power interlocking switches 11b and 11c are switched in step S100. By switching the power supply interlocking switches 11b and 11c, the connection of the first and second coils 32a and 32b is switched from the driver circuit 29 to the counter IC 70, thereby generating electromagnetic induction in the first and second coils 31a and 31b. The charged power is charged in the capacitors C11 and C12. Further, in step S110, the operation of the counter IC 70 is started, and currents generated by electromagnetic induction in the first and second coils 31a and 31b are input to the signal determination circuit 71. The signal determination circuit 71 detects the presence or absence of vibration based on the walking motion based on the current. When detecting the vibration, the signal determination circuit 71 outputs a count signal to the counter circuit 72.

  In step S <b> 120, it is determined whether a count signal is input from the signal determination circuit 71 toward the counter circuit 72. Here, if not entered, the routine is made to wait in step S120. If it is determined that the count signal has been input, the process proceeds to step S130, and the count value of the counter of the count circuit 72 is incremented by one. The routine of steps S120 to S130 is repeated until the power switch 11a is turned on, whereby the vibration of the digital camera 10, that is, the number of walks is counted.

  FIG. 9 is a routine showing the operation of the CPU 21 when the digital camera 10 is shifted to the shooting mode. As shown in FIG. 9, when the power switch 11a is turned on, the CPU 21 accesses the counter in the counter circuit 72 in step S200 and reads the count value of the counter. In step S210, it is first determined whether or not the count value is recorded in the counter. If it is determined that the count value is recorded, the process proceeds to step S220, and the count value of the counter is reset to zero. Next, in step S230, after the read count value is multiplied by ½, the count value obtained by multiplying the ½ is displayed on the LCD 17, and then the process proceeds to step S240. On the other hand, if it is determined in step S210 that the count value is 0, steps S220 to 230 are skipped and the process proceeds to step S240. In step S240, the power supply interlocking switches 11d and 11e are turned on, and charging of the capacitors 11d and 11e is started by the power supply Vcc. Next, in step S250, driving of the imaging block 22 and the like is started, the digital camera 10 is shifted to a shooting mode, a shooting operation is started, and this routine ends.

  As described above, in this embodiment, since the number of walks is counted using the first and second coils 32a and 32b of the image blur correction device 30, the function of the pedometer is added to the digital camera 10 with a small number of members. Can be granted. Furthermore, since the presence or absence of vibration due to walking is detected using current generated by electromagnetic induction, the number of walks can be counted with less power.

  Moreover, in this embodiment, since it is detected whether the vibration based on walking generate | occur | produced based on the electric current which generate | occur | produced with two coils, the number of steps can be counted correctly. In particular, in the present embodiment, the first and second coils 32a and 32b detect vibrations in the horizontal direction (first direction x) and the vertical direction (second direction y) that are likely to generate vibrations due to walking. The number of walks is accurately detected. In the present embodiment, the imaging block 22 is driven for image blur correction, but it is of course possible to drive the image blur correction lens.

  Furthermore, the current generated by electromagnetic induction is charged by the capacitors C11 and C12, and power is supplied from these capacitors to the counter IC. Therefore, the number of walks can be counted almost independently of the power supply Vcc. The capacitors C11 and C12 are charged by the power supply Vcc in the shooting mode. Therefore, immediately after the start of counting the number of steps, the counter IC 70 can be driven even when the electric power generated by electromagnetic induction is not sufficiently charged in the capacitor.

It is the perspective view which looked at the digital camera from back. It is the front view which looked at the digital camera from the front. It is a circuit block diagram of a digital camera. It is a block diagram which shows an image blurring correction apparatus typically. It is a block diagram which shows typically the image blurring correction apparatus in the cross section on the VV line of FIG. It is a circuit block diagram of the 1st and 2nd coil, and counter IC. It is a figure which shows typically the alternating current produced in a 1st and 2nd coil, and a 1st and 2nd vibration determination signal. It is a flowchart which shows the routine of a pedometer mode. It is a flowchart which shows a routine when it transfers to imaging | photography mode from pedometer mode.

Explanation of symbols

10 Digital camera 11 Power button (operating member)
17 LCD monitor (display unit)
21 CPU
22 Imaging block 29 Driver circuit (driving means)
30 Image blur correction device 30a Movable part 30b Fixed part 32a First coil (coil part)
32b Second coil (coil part)
39 Image sensor 43a First yoke 43b Second yoke 67 Image pickup lens 71 Signal determination circuit (detection means)
72 Counter circuit (counting means)
C11, C12 capacitors (charging means)
LX optical axis

Claims (8)

An optical element that receives light from a subject and forms the received light as a subject image and an image sensor that captures the subject image, and the optical element or the image sensor for correcting blur of the subject image A portable imaging device capable of displacing at least a part of the device, detecting vibration based on walking motion, and counting the number of vibrations as the number of steps,
A coil portion arranged to be displaceable in a predetermined magnetic field;
Driving means for displacing at least a part of the optical element by causing an electric current to flow through the coil part to generate electromagnetic force and displacing the coil part;
Detecting means for detecting vibration based on walking motion based on current generated by electromagnetic induction due to displacement of the coil part when no current is passed from the driving means to the coil part;
Counting means for counting the number of vibrations detected by the detection means as the number of walks. The coil portion includes first and second coils,
The detection means detects vibration based on walking motion based on first and second currents generated by electromagnetic induction based on displacement of the first and second coils, respectively. Portable imaging equipment.   The said detection means detects that the displacement of the said coil part is a vibration based on a walking motion, when any one electric current generate | occur | produced with the said 1st and 2nd coil is more than predetermined amount. 2. The portable imaging device according to 2.   The first coil is displaced in a first direction perpendicular to the optical axis of the optical element, and the second coil is displaced in a first direction perpendicular to the first direction and the optical axis, thereby causing electromagnetic induction. The portable imaging device according to claim 2, wherein a current is generated at the same time.   The portable imaging device according to claim 4, wherein the first coil is displaced in the first direction and the second coil is displaced in the second direction by electromagnetic force.   The apparatus further comprises charging means for charging electric power generated by displacement of the coil section when no current is passed from the driving means to the coil section, and the charged electric power is supplied to the detection means and the counting means. The portable imaging device according to claim 1, wherein the portable imaging device is used for driving. By operating the operating member, the first mode in which the portable imaging device operates as an imaging device and the second mode in which the portable imaging device stops operating as an imaging device are switched,
2. The mobile phone according to claim 1, wherein in the second mode, the vibration is detected and the number of walks is counted, while in the first mode, the count of the number of walks is stopped. Imaging equipment. A display for displaying an image;
The portable video device according to claim 7, further comprising: a display unit configured to display the number of walks on the display unit when the mode is switched from the second mode to the first mode.

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