JP4011875B2 - Mobile device with built-in image sensor - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a portable device with a built-in image sensor, and more particularly to a portable device with a built-in image sensor that uses a rechargeable secondary battery as a power source and can charge the secondary battery by electromagnetic force.
[0002]
[Prior art]
Conventionally, the power source of a camera that records a photographed image on photographic film generally uses a primary battery that cannot be recharged. When the power supplied to the battery drops, the battery is removed from the camera and a new battery is used. It is necessary to wear. Even when a rechargeable secondary battery is used, it is necessary to remove the battery from the camera every time it is charged, and to attach the battery after the charging is completed.
[0003]
As described above, in the conventional camera, every time the power supplied to the battery decreases, the battery must be removed from the camera body and replaced with a new battery, or a battery after completion of charging must be attached. .
[0004]
In order to solve this problem, Japanese Patent Laid-Open No. 7-14615 discloses a camera power supply system in which a power source is a secondary battery, and the secondary battery is contactless by electromagnetic induction while the secondary battery is mounted on the camera. A power supply system for charging is disclosed.
[0005]
[Problems to be solved by the invention]
However, in the above prior art, since the secondary battery is charged by electromagnetic induction, when applied to a digital camera equipped with an image pickup device such as a CCD or an IC such as a signal processing circuit, a strong magnetic force is applied to the IC. There was a problem that it could break or malfunction.
[0006]
An object of the present invention is to obtain a portable device with a built-in image sensor that can prevent an electronic circuit component such as an IC from being damaged or malfunctioning in consideration of the above facts.
[0007]
[Means for Solving the Problems]
In order to achieve the above object, the invention described in claim 1 A battery that is charged by a charger as a power source, a strobe that emits auxiliary light, and In a portable device with a built-in image sensor having an image sensor for imaging a subject, a plurality of regions that do not overlap each other are defined inside the device, and one of the plurality of regions is used as a coil side region, and an element that uses a magnetic field Of the plurality of regions excluding the coil side region as a weak region, and arranged to accommodate an element using a weak current. When charging the battery, it is energized by a magnetic field generated by energization of a coil provided in the charger, and when causing the strobe to emit light, a current is passed and the first coil functions as a trigger coil; A second coil that generates an electromotive force in response to energization of the first coil when the coil provided in the charger is energized; and a voltage generated in the first coil when the strobe is caused to emit light A step-up coil that boosts the voltage of the second coil, and the battery is charged by an electromotive force generated in the second coil, and the strobe emits light by a voltage boosted by the step-up coil. It is characterized by that.
[0008]
Mobile device with built-in image sensor A battery that is charged by a charger as a power source, a strobe that emits auxiliary light, and An imaging element for imaging a subject is included. Examples of the mobile device with a built-in image sensor include a digital camera and a mobile phone with a camera. Examples of the image sensor include a CCD and a CMOS sensor.
[0009]
A plurality of regions that do not overlap with each other are defined inside the portable device with such an image pickup device, and one of the plurality of regions is defined as a coil side region. This coil side region is a region for accommodating an element using a magnetic field generated from, for example, a charger, When charging the battery, it is energized by a magnetic field generated by energization of a coil provided in the charger, and when causing the strobe to emit light, a first coil that functions as a trigger coil by flowing current is provided in the charger. A second coil that generates an electromotive force in response to energization of the first coil when the coil is energized, and a boosting coil that boosts the voltage generated in the first coil when the strobe emits light. Is housed. Further, for example, as described in claim 3, at least one of a battery, an element constituting a charge control unit for controlling charging of the battery, and an element for driving and controlling the strobe can be accommodated. That is, mainly the electric circuit components that are not affected by the magnetic field are accommodated in the coil side region.
[0010]
Moreover, one area | region except the coil side area | region of a some area | region is made into a weak area | region. This weak region is a region for accommodating an element that uses a weak current, for example, 4 As described above, at least one of an image sensor, an element constituting an analog signal processor that processes an output signal from the image sensor, and an element constituting an A / D converter that converts an analog signal into a digital signal One is housed. That is, in the weak region, an electronic circuit component, particularly an IC, which is an element that uses a weak current that is easily affected by a magnetic field is accommodated.
[0011]
In this way, by separating the area that houses the element that uses the magnetic field and the element that uses the weak current, the element that uses the weak current is prevented from being damaged or malfunctioning due to the influence of the magnetic field. Can do.
[0013]
Further, as described in claim 5, a separation unit that separates the coil side region and the weak region may be provided at a substantially central portion inside the device. The separation unit uses, for example, a shielding plate that shields a magnetic field. Thereby, the influence of a magnetic field can further be reduced.
[0014]
According to a sixth aspect of the present invention, in the portable device with a built-in image sensor that uses a battery charged by a charger as a power source and has a strobe that emits auxiliary light and an image sensor for imaging a subject, the battery is charged. Sometimes, a current is applied by a magnetic field generated by energization of a coil provided in the charger, and when the strobe is caused to emit light, a current is passed and a first coil that functions as a trigger coil is provided in the charger. A second coil that generates an electromotive force in response to energization of the first coil when the coil is energized, and a boosting coil that boosts the voltage generated in the first coil when the strobe emits light. The battery is charged by an electromotive force generated in the second coil, and the strobe is Characterized by emitting the divided voltage .
As described in claims 1 and 6, the first coil is Trigger coil for firing the strobe as well as With a coil for charging do it Share Ruta Me , The number of parts can be reduced, and the apparatus can be configured at low cost.
[0015]
In this case, the claim 2 and 7 As stated in By using a part of the booster coil as the second coil, Battery with voltage boosted by boosting coil The charging can do . That is, The first coil Coil for charging as well as Trigger coil for strobe lighting As While sharing Boost coil For charging and strobe lighting In Sharing. Thereby, even when the magnetic field generated from the charger or the like is weak, the battery can be sufficiently charged.
[0016]
Furthermore, as described in claim 8, the apparatus further comprises a screw hole for fixing the apparatus main body to a tripod, and the screw hole is provided in the screw hole. At least the second coil It is good also as a structure wound around. in this case, Provided in the charger With the magnetic core around which the coil is wound inserted into the screw hole, Provided in the charger It was wound around the screw hole by passing current through the coil. Second An electromotive force is generated in the coil, and the battery can be charged.
[0017]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. In the digital camera 10 to which the present invention is applied, as shown in FIGS. 1A and 1B, the main body 11 is substantially box-shaped, and the main body 11 can be easily gripped on the left side when viewed from the front. A grip portion is formed.
[0018]
On the front side of the main body 11, as shown in FIG. 1A, a lens 14, a finder 15 for visually confirming a photographing range, and a strobe for emitting auxiliary light in the case of photographing at low illumination. 16 is attached.
[0019]
Further, a slot 23 into which a memory card 18 as an information recording medium such as smart media can be loaded is provided on the right side as viewed from the front of the main body 11. ), The mode dial 47 and the power switch 21 are provided on the left side, and the central portion of the mode dial 47 is the shutter button 12. In addition, an accommodation port 28 of a battery 26 that is a power source of the digital camera 10 is provided on the left side as viewed from the front of the main body 11. The battery 26 is charged with electric power supplied from a charger 50 described later.
[0020]
Furthermore, a screw hole 32 for fixing the digital camera 10 to a tripod is provided on the bottom left bottom when viewed from the front of the main body 11.
[0021]
The mode dial 47 is a dial for selecting an operation mode of the digital camera, and includes, for example, an auto shooting mode, a manual shooting mode, a self-timer shooting mode, a playback mode, a PC mode for connecting to a personal computer and outputting an image, and various functions. Select one of the setup item setting modes for setting the initial conditions. In the compression method switching program, a compression method switching mode for switching the compression method according to the size of the activity value of the image and a Basic mode for always compressing the image by the JPEG method are selected. The shutter button 12 is configured to perform AF processing when half-pressed and to perform imaging processing when fully pressed.
[0022]
Further, as shown in FIG. 1B, a color display 46 made of a reflective LCD or a transmissive front LCD is attached to the lower side of the back surface of the main body 11. Various selection buttons such as a monochrome liquid crystal display panel 13, a strobe button 17, a cross button 19, and a menu execution button 25 are provided.
[0023]
The display 46 is composed of a liquid crystal display panel having a screen size of, for example, 640 × 480 pixels. When there is an image display instruction, the display 46 displays an image file stored in the memory 42 described later or an image file read from the memory card 18. Based on this, an image is displayed on the entire screen, a plurality of reduced images are displayed side by side (hereinafter referred to as thumbnail display), and various function selection screens are displayed. The liquid crystal display panel 13 displays the current settings of the digital camera such as the operation mode, image quality, battery capacity, strobe light emission / non-light emission, and the number of images that can be taken.
[0024]
The cross button 19 is a button for selecting a button displayed on the display 46 or moving a cursor when the display 46 is a various item selection screen. The strobe button 17 is a button for issuing a forced flash instruction when the flash is forced to emit light, or a flash prohibition instruction when prohibiting the flash, and the menu execution button 25 is displayed on the display 46 and is a cross button. 19 is a button for issuing an execution instruction for the item selected in 19.
[0025]
FIG. 2 shows the configuration of the electrical system of the digital camera 10. Specifically, the lens 14 is a zoom lens (focal length variable lens) provided with a mechanism (autofocus (AF) mechanism) capable of changing a focal position by a driving force of a driving source such as a stepping motor. The zoom mechanism is driven by the drive circuit 24a. The drive circuit 24a also performs drive control of various components such as driving of the strobe 16 and an imaging device (imaging device) 30 described later. Further, instead of the lens 14, a fixed focal length lens having only an AF mechanism may be used.
[0026]
An imaging device 30 made of an area CCD and provided with an electronic shutter mechanism is disposed at a position corresponding to the focal position of the lens 14 inside the main body 11, and the light reflected from the subject and incident on the lens 14 is imaged. An image is formed on the light receiving surface of the device 30. Note that the imaging device 30 may use a CMOS sensor instead of the CCD.
[0027]
The image pickup device 30 is driven by a drive circuit 24a, and the drive circuit 24a drives the image pickup device 30 at a timing synchronized with the timing signal generated by the timing signal generation circuit 27 to generate an image signal (matrix on the light receiving surface). (A signal indicating the amount of received light in each of a large number of photoelectric conversion cells arranged in a row).
[0028]
The timing signal generation circuit 27 is controlled by the control unit 22 configured by a microcomputer, and generates various timing signals (clock signals) for operating the imaging device 30, the A / D conversion unit 38, and the like.
[0029]
Further, the imaging device 30 outputs the image signal to the analog signal processing unit 36 via an amplifier (not shown). The analog signal processing unit 36 is connected to an A / D conversion unit 38, and a signal output from the imaging device 30 is amplified by an amplifier and converted into digital data by the A / D conversion unit 38.
[0030]
The output terminal of the A / D conversion unit 38 is connected to the digital signal processing unit 40 through a correlated double sampling circuit (CDS circuit) (not shown) and an internal interface (I / F) circuit (not shown) in this order. The CDS circuit samples feedthrough data representing the level of the feedthrough signal and pixel data representing the level of the pixel signal, and subtracts the feedthrough data from the pixel data for each pixel. Then, the calculation result (pixel data accurately corresponding to the accumulated charge amount in each CCD cell) is sequentially output to the digital signal processing unit 40 as a scan image file via the I / F circuit.
[0031]
The digital signal processing unit 40 performs predetermined digital signal processing (for example, shading correction processing) on the input digital signal and outputs it as an original image file to the memory 42 via the data bus 88. The digital signal processing unit 40 outputs a video signal when an external device (not shown) is connected to the video output terminal. Further, when a thumbnail display instruction is issued from the control unit 22, the digital signal processing unit 40 displays a plurality of thumbnail images stored in association with each of the plurality of image files stored in the memory 42 on the display 46. Let
[0032]
The memory 42 temporarily stores an image file read for search during reproduction, or stores an image file output from the digital signal processing unit 40 via the data bus 88. At this time, if there is a write instruction to the memory card 18 such as a smart media or a floppy disk, the stored image file is subjected to predetermined image compression processing (for example, JPEG processing) by the compression / decompression unit 44, and then the memory card drive 20 And is written to the memory card via the external interface (external I / F) 43. It can be set so that the compression / decompression unit 44 writes without compression.
[0033]
The external I / F 43 is provided with a digital IO port 31 so that the image file can be output to other devices connected to the digital IO port 31.
[0034]
When an instruction to reproduce (display) an image using an image file stored in a memory card loaded in the slot 23 is given, the image file is read from the memory card. When the read image file is compressed and stored, the compressed image file is decompressed (decompressed) by the compression / decompression unit 44 and then stored in the memory 42. Then, the digital signal processing unit 40 transfers the image file stored in the memory 42 to the liquid crystal driving circuit 24b and causes the display 46 to display (reproduce) the image.
[0035]
The control unit 22 includes a CPU, a ROM, and a RAM. The shutter button 12, the memory card drive 20, the drive circuit 24a, the memory 42, the compression / decompression unit 44, the display 46, and the menu execution button 25 are directly or via the data bus 88. And a charging control unit 34 are connected.
[0036]
The ROM stores a program for controlling the above-described various components connected to the control unit 22, a compression method switching program, and the like. The RAM stores various data necessary for each program input via the data bus 88.
[0037]
The CPU reads various programs from the ROM to control each component, and in the recording mode at the time of shooting, reads the compression mode switching program from the ROM and stores the image data representing the shot image. To compress and save the image data with the selected compression method.
[0038]
A power supply circuit 35 is connected to the charging control unit 34. The power supply circuit 35 charges the battery 26 with electric power supplied from the charger 50 shown in FIG. The charging control unit 34 controls the power supply circuit 35 and controls charging of the battery 26.
[0039]
The charger 50 includes a control unit 52 as shown in FIG. A power supply unit 54 and a charge start switch 56 are connected to the control unit 52. A coil 58 is connected to the power supply unit 54.
[0040]
The charging start switch 56 is a switch to be turned on when charging of the battery 26 is started. When the charging start switch 56 is turned on, the control unit 52 controls the power supply unit 54 so that a current flows through the coil 58. Thereby, the power supply part 54 adjusts the electric power supplied, for example from a general household power supply (AC100V), and sends an electric current through the coil 58. FIG.
[0041]
The charging start switch 56 can be a switch that is turned on by the weight of the charger 50 when the digital camera 10 is set in the charger 50, for example. Thereby, charge can be started only by setting the digital camera 10 to a charger. Moreover, it is good also as a switch turned on by a user's operation.
[0042]
On the other hand, the coil 60 is connected to the charging control unit 34 of the digital camera 10, and when the digital camera 10 is set in the charger 50, as shown in FIGS. 3 and 4A, the charger 50 coils 58 and the coil 60 of the digital camera 10 are opposed to each other.
[0043]
Therefore, when the digital camera 10 is set in the charger 50 and a current flows through the coil 58, a magnetic field 62 is generated in the direction of the arrow in the figure by the current flowing through the coil 58 as shown in FIG. The magnetic field 62 causes a current corresponding to the winding ratio between the coil 58 and the coil 60 to flow through the coil 60. The charge controller 34 controls the battery 26 to be charged by the current generated in the coil 60 while monitoring the charge amount of the battery 26. Then, when the battery 26 is fully charged, the charging is stopped.
[0044]
Thus, since the battery 26 can be charged by so-called electromagnetic induction, the battery 26 can be charged without being taken out from the digital camera 10.
[0045]
As shown in FIG. 4B, the coils 60A and 60B may be wound around the magnetic core 64 on the digital camera 10 side, and the coil 58 may be wound around the magnetic core 66 on the charger 50 side. In this case, a magnetic field is generated from the charger 50 side to the digital camera 10 side by the current flowing through the coil 58 (in the direction of the arrow in the figure). The coil 60A is generated by the generated magnetic field. Current flows through Then, a current flows in the coil 60B by the magnetic field generated in the magnetic core 64 by the current flowing in the coil 60A, The battery 26 is charged by this current.
[0046]
As described above, since electromagnetic induction is used for charging the battery 26, a magnetic field is generated from the charger 50 side toward the digital camera 10 side, that is, from the lower side toward the upper side of the digital camera 10. Therefore, when an IC such as a CCD is disposed near the coil 60, the IC may be damaged or malfunction due to a magnetic field generated during charging.
[0047]
In particular, when an IC such as the imaging device 30 that handles analog signals is disposed in the vicinity of the coil 60, there is a high possibility that the IC is damaged or malfunctions.
[0048]
Therefore, in the present embodiment, as shown in FIG. 5, the coil 60 is arranged at the lower right when viewed from the back of the digital camera 10, and the IC of the imaging device 30 is arranged at a position farthest from the coil 60.
[0049]
In addition, electrical circuit components of a power supply system are mainly arranged on the right half side when viewed from the back of the digital camera 10, and electronic components such as signal processing circuits are mainly disposed on the left half side (weak area) when viewed from the back of the digital camera 10. IC components constituting the circuit are arranged.
[0050]
Specifically, on the right half side (coil side region) when viewed from the back of the digital camera 10, the coil 60, the charge control board 68 on which the components constituting the charge control unit 34 are mounted, and the components constituting the power supply circuit 35. A strobe control board 72 on which at least a part of the capacitor 70, the battery 26, and the drive circuit 24a for driving and controlling the strobe 16 are mounted is disposed.
[0051]
The element arranged on the left half side corresponds to an element using the magnetic field of the present invention, and the element arranged on the right half side corresponds to an element using the weak current of the present invention.
[0052]
In this way, components that are less affected by the magnetic field generated by the coil 60 are arranged on the right half side as viewed from the back of the digital camera 10.
[0053]
Further, on the left half side when viewed from the back of the digital camera 10, an IC constituting the imaging device 30, an IC constituting the A / D conversion unit 38, an IC constituting the analog signal processing unit 36, and a memory 42 are constituted. IC and other ICs 74 to 78 are arranged. The ICs 74 to 78 are ICs that constitute, for example, the timing signal generation circuit 27, the digital signal processing unit 40, the liquid crystal driving circuit 24b, and the like.
[0054]
In this way, an IC group such as an IC that handles a weak current or an IC that has fine wiring is arranged on the left half side when viewed from the back of the digital camera 10. More specifically, the distance from the coil 60 is increased for ICs that are more susceptible to the adverse effects of magnetic fields. In particular, an IC that handles analog signals increases the separation distance from the coil 60.
[0055]
In this way, components that have a large adverse effect of the magnetic field generated by the coil 60 are arranged on the left half side as viewed from the back of the digital camera 10.
[0056]
Thereby, it is possible to prevent the IC from being damaged or malfunctioning due to the influence of the magnetic field generated during charging. Note that the substrate is preferably disposed in a direction in which the surface including the substrate on which the IC or the like is mounted and the direction of the magnetic field generated by the coil 60 are not orthogonal, that is, in a direction that is substantially parallel. Thereby, the influence of a magnetic field can further be reduced.
[0057]
Further, a shielding plate (separating part) for shielding the magnetic field may be provided at substantially the center of the digital camera 10 (position indicated by a one-dot chain line in FIG. 5). Thereby, it is possible to more effectively prevent malfunction of the IC due to the magnetic field.
[0058]
4B, as a configuration of the power generation unit for charging the battery, a configuration in which the coils 60A and 60B are wound around the magnetic core 64 on the digital camera 10 side, and a coil 58 is wound on the magnetic core 66 on the charger 50 side. As a modification of this, as shown in FIG. 6A, the trigger coil included in the circuit for emitting the strobe 16 constituting a part of the drive circuit 24a is shared with the coil 60A, and the trigger As a configuration in which a booster coil (secondary side) 80 for boosting a voltage generated in the coil (primary side) is wound around a magnetic core 64. Also good. In addition, The winding ratio between the trigger coil and the booster coil is, for example, 1:30.
[0059]
in this case, Due to the current flowing in the coil 58 A current flows through the coil 60A due to the generated magnetic field, thereby A current flows through the coil 60 </ b> B by the magnetic field generated in the magnetic core 64. The battery can also be charged by the current flowing through the coil 60B. The battery may be charged by the current flowing through the booster coil 80.
[0060]
Further, at the time of strobe light emission, a current is passed through the coil 60A, whereby strobe light is emitted by the current flowing through the booster coil 80.
[0061]
In this way, by using a configuration in which the power generation unit for charging the battery and the power generation unit for strobe light emission are shared, the number of parts can be reduced and the configuration can be made inexpensive.
[0062]
In addition, as shown in FIG. 6B, the coil 60 </ b> B may be shared with the booster coil 80. That is, the terminal b is pulled out from the position corresponding to the number of windings of the coil 60B, and when charging the battery, the voltage Vab generated between the terminals a and b (or the voltage Vbc generated between the terminals bc) is used to strobe. At the time of light emission, the voltage Vac generated between the terminals ac is used. With this configuration, the number of parts can be further reduced.
[0063]
Moreover, as shown to FIG. 7 (A), it is good also as a structure which wound the coil 60 around the screw hole 32 for tripod fixation. In this case, the charger 50 is configured such that a magnetic core 82 such as a ferrite core is attached so as to partially protrude. The length of the protruding portion of the magnetic core 82 is substantially equal to the depth of the screw hole 32, and the diameter of the magnetic core 82 is slightly smaller than the diameter of the screw hole 32.
[0064]
At the time of charging, the digital camera 10 is set in the charger 50 so that the protruding portion of the magnetic core 82 of the charger 50 is accommodated in the screw hole 32 as shown in FIG. Thus, when a current flows through the coil 58, a magnetic field is generated in the longitudinal direction of the magnetic core 82. A current flows through the coil 60 by the generated magnetic field, and the battery 26 can be charged by this current.
[0065]
In the present embodiment, the case where the present invention is applied to a digital camera has been described. However, the present invention is not limited to this, and it goes without saying that the present invention can also be applied to, for example, a camera-equipped mobile phone.
[0066]
【The invention's effect】
As described above, according to the present invention, since the region that accommodates the element that uses the magnetic field and the element that uses the weak current is separated, the element that uses the weak current is damaged or malfunctions due to the influence of the magnetic field. There is an effect that can be prevented.
[Brief description of the drawings]
1A is a front view of a digital camera, and FIG. 1B is a rear view of the digital camera.
FIG. 2 is a block diagram showing a configuration of an electric system of the digital camera.
FIG. 3 is a diagram illustrating a configuration of a power supply system of a digital camera and a charger.
FIG. 4 is a schematic configuration diagram showing a schematic configuration of a power generation unit.
FIG. 5 is an arrangement diagram showing the arrangement of components of the digital camera.
FIG. 6 is a schematic configuration diagram illustrating another example of the power generation unit.
FIG. 7 is a schematic configuration diagram illustrating another example of the power generation unit.
[Explanation of symbols]
10 Digital camera
16 Strobe
26 battery
30 Imaging device
32 Screw holes
35 Power supply circuit
36 Analog signal processor
38 A / D converter
40 Digital signal processor
42 memory
50 charger
58 coils
60 coils
68 Charge control board
72 Strobe control board
80 Booster coil

Claims (8)

In a portable device with a built-in image sensor that has a battery charged by a charger as a power source, a strobe that emits auxiliary light, and an image sensor for imaging a subject,
A plurality of regions that do not overlap with each other are defined inside the device, and one of the plurality of regions is used as a coil side region, and is arranged to accommodate an element that uses a magnetic field,
One region excluding the coil side region of the plurality of regions is set as a weak region, and arranged to accommodate an element using a weak current ,
When charging the battery, the first coil that is energized by a magnetic field generated by energization of a coil provided in the charger, and when the strobe emits light, current flows and functions as a trigger coil;
A second coil that generates an electromotive force in response to energization of the first coil when the coil provided in the charger is energized;
A boosting coil that boosts the voltage generated in the first coil when the strobe is caused to emit light;
In the coil side region,
The battery is charged by an electromotive force generated in the second coil,
The strobe emits light with a voltage boosted by the booster coil . The portable device with a built-in image sensor according to claim 1, wherein a part of the booster coil is used as the second coil . 2. The coil-side region further includes at least one of the battery, an element that constitutes a charge control unit that controls charging of the battery, and an element that controls driving of the strobe. 2. A portable device with a built-in image sensor according to 2. In the weak region, the image sensor, an element constituting an analog signal processing unit that processes an output signal from the image sensor, and an element constituting an A / D conversion unit that converts the analog signal into a digital signal The mobile device with a built-in image sensor according to claim 1, wherein at least one is stored .   5. The portable device with a built-in image sensor according to claim 1, wherein a separation unit that separates the coil-side region and the weak region is provided at a substantially center inside the device. In a portable device with a built-in image sensor that has a battery charged by a charger as a power source, a strobe that emits auxiliary light, and an image sensor for imaging a subject,
When charging the battery, the first coil that is energized by a magnetic field generated by energization of a coil provided in the charger, and when the strobe emits light, current flows and functions as a trigger coil;
A second coil that generates an electromotive force in response to energization of the first coil when the coil provided in the charger is energized;
A boosting coil that boosts the voltage generated in the first coil when the strobe is caused to emit light;
With
The battery is charged by an electromotive force generated in the second coil,
The strobe emits light by a voltage boosted by the boost coil.
A portable device with a built- in image sensor. The portable device with a built- in image sensor according to claim 6, wherein a part of the booster coil is used as the second coil . The apparatus main body further includes a threaded bore for fixing to a tripod, the image pickup device built according to any one of claims 1-7, characterized in that at least the second coil wound around the screw hole Portable device.

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