WO2015041066A1 - カメラモジュールおよび電子機器 - Google Patents
カメラモジュールおよび電子機器 Download PDFInfo
- Publication number
- WO2015041066A1 WO2015041066A1 PCT/JP2014/073446 JP2014073446W WO2015041066A1 WO 2015041066 A1 WO2015041066 A1 WO 2015041066A1 JP 2014073446 W JP2014073446 W JP 2014073446W WO 2015041066 A1 WO2015041066 A1 WO 2015041066A1
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- WIPO (PCT)
- Prior art keywords
- lens
- camera module
- coil
- feeding coil
- substrate
- Prior art date
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F38/00—Adaptations of transformers or inductances for specific applications or functions
- H01F38/14—Inductive couplings
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F27/00—Details of transformers or inductances, in general
- H01F27/28—Coils; Windings; Conductive connections
- H01F27/2804—Printed windings
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N23/00—Cameras or camera modules comprising electronic image sensors; Control thereof
- H04N23/50—Constructional details
- H04N23/51—Housings
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N23/00—Cameras or camera modules comprising electronic image sensors; Control thereof
- H04N23/50—Constructional details
- H04N23/55—Optical parts specially adapted for electronic image sensors; Mounting thereof
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N23/00—Cameras or camera modules comprising electronic image sensors; Control thereof
- H04N23/57—Mechanical or electrical details of cameras or camera modules specially adapted for being embedded in other devices
Definitions
- the present invention relates to a camera module incorporated in a portable electronic device, for example, and an electronic device incorporating the camera module.
- HF band communication systems such as “NFC” and “Near Field Communication” is being promoted.
- the antenna coil for HF band is shielded by the metal casing, so that there is a problem that communication with the communication partner cannot be performed or the communication distance is significantly deteriorated.
- the camera module When the opening is used as a hole for a camera lens, the camera module is disposed at the center of the feeding coil, and the magnetic field distribution near the feeding coil is affected by the positional relationship between the feeding coil and the camera module. Therefore, if the relative position between the power supply coil and the camera module varies, the magnetic field distribution in the vicinity of the power supply coil varies, and the coupling state between the metal housing used as the radiating element and the power supply coil also varies. As a result, a desired communication characteristic may not be obtained. In particular, since it is necessary to match the positions (three positions) of the opening portions of the camera module, the feeding coil, and the metal housing, it is difficult to increase the relative positional accuracy between the camera module and the feeding coil.
- An object of the present invention is to provide a camera module and an electronic device that can obtain stable communication characteristics using a power supply coil by solving a problem due to a positional deviation between the power supply coil and the camera module.
- the camera module of the present invention includes a lens and an image sensor that converts an image formed by the lens into an electric signal, and the lens is exposed from an opening formed in a conductive casing of an electronic device.
- a power supply coil to which the power supply circuit is directly or indirectly connected is mounted.
- the power feeding coil is incorporated (integrated) in the camera module, a problem due to the positional deviation of the power feeding coil and the camera module hardly occurs, and stable communication characteristics can be obtained.
- the feeding coil is preferably disposed in a space between the image sensor and the lens in the optical axis direction of the lens. According to this configuration, the space between the lens and the image sensor can be used effectively, and the power supply coil can be made smaller than when the power supply coil is disposed avoiding the camera module. Furthermore, since the feeding coil can be brought close to the opening of the conductive casing, the electromagnetic field coupling between the feeding coil and the casing can be further enhanced.
- the power supply coil is preferably provided in, for example, a lens holder so as to wind around the optical axis of the lens. According to this configuration, the size of the camera module is not increased, and a feeding coil with a large number of turns can be provided.
- the power supply coil is provided on the substrate so as to wind around the optical axis of the lens, for example. According to this configuration, it is easy to form and assemble the feeding coil.
- the power supply coil is configured as a chip part having a conductor winding pattern, for example, and is arranged on a substrate. According to this configuration, it is possible to use a feeding coil configured in a separate process.
- the camera module of the present invention has a plurality of signal lines in which a first end is connected to the circuit on the image sensor or the substrate side, and a second end opposite to the first end is connected to a circuit on the electronic device side.
- the power supply coil is connected to a part of a plurality of signal lines of the cable. According to this configuration, there is no need to separately provide a cable for the feeding coil, and the number of parts can be reduced.
- An electronic apparatus of the present invention is an electronic apparatus comprising a conductive housing having an opening, and a camera module having a lens and an image sensor that converts an image formed by the lens into an electrical signal.
- the camera module is arranged so that the lens is exposed from the opening,
- the camera module is equipped with a feeding coil to which a feeding circuit is connected directly or indirectly,
- the casing acts as a radiating element for wireless communication by the electromagnetic coupling between the casing and the feeding coil.
- the housing of the electronic device can be used as a radiating element for wireless communication, and stable communication characteristics can be obtained.
- the camera module further includes a lens holder for holding a lens, the power supply coil is provided on the lens holder so as to wind around the optical axis of the lens, and the power supply coil is located at a position extending inside and outside the housing. It is preferable that they are arranged. With this configuration, fluctuations in characteristics due to variations in the position of the camera module with respect to the housing are suppressed.
- a circuit board in a housing of the electronic device may be provided with a coupling coil that is magnetically coupled to the feeding coil. According to this configuration, there is no need to provide a signal line for wireless communication on the cable connecting the camera module and the circuit on the electronic device main body side.
- the present invention there is no problem due to the positional deviation between the feeding coil and the camera module, so that it is possible to configure a camera module and an electronic device that can obtain stable communication characteristics.
- FIG. 1A is a top (front) view of the electronic apparatus 101 including the camera module according to the first embodiment
- FIG. 1B is a bottom (rear) view of the electronic apparatus 101
- FIG. 2A is a plan view showing a configuration in the vicinity of the opening 51 formed in the metal casing.
- FIG. 2B is a cross-sectional view taken along the line BB in FIG.
- FIG. 3 is a cross-sectional view taken along the line CC in FIG.
- FIG. 4 is a perspective view of the camera module 11.
- FIG. 5 is a circuit diagram of a high-frequency circuit including the feeding coil 5.
- 6A is a bottom (rear) view of the electronic apparatus 101
- FIG. 6B is a cross-sectional view of the BB portion in FIG.
- FIG. 7 is a cross-sectional view illustrating the structure of the camera module according to the second embodiment together with a part of the metal casing.
- FIG. 8 is a cross-sectional view illustrating the structure of the camera module according to the third embodiment together with a part of the metal casing.
- FIG. 9 is a cross-sectional view illustrating the structure of a camera module according to the fourth embodiment together with a part of a metal casing.
- FIG. 10 is a cross-sectional view illustrating the structure of a camera module according to the fifth embodiment together with a part of a metal housing.
- 11A is a cross-sectional view of each part before the camera module 15 is assembled, and FIG.
- FIG. 11B is a cross-sectional view after the assembly.
- FIG. 12 is a cross-sectional view illustrating the structure of a camera module according to the sixth embodiment together with a part of a metal housing.
- FIG. 13 is a cross-sectional view illustrating the structure of a camera module and an electronic device according to the seventh embodiment.
- FIG. 14 is a circuit diagram of the antenna device including the feeding coil 5 and the coupling coil 26.
- FIG. 15 is a cross-sectional view illustrating the structure of a camera module and an electronic device according to the eighth embodiment.
- FIG. 16 is a cross-sectional view illustrating the structure of a camera module and an electronic apparatus according to the ninth embodiment.
- FIG. 1A is a top (front) view of the electronic apparatus 101 including the camera module according to the first embodiment
- FIG. 1B is a bottom (rear) view of the electronic apparatus 101.
- the electronic device 101 is, for example, a mobile phone terminal or a tablet terminal, and includes a circuit that performs communication using NFC.
- the electronic device 101 includes a resin casing 40 and a metal casing 50 having conductivity. An opening 51 and a slit 52 are formed in the metal casing 50.
- a camera module is provided in the housing of the electronic device 101 so that the lens faces the opening 51. The lens 1 of the camera module is provided so as to be exposed from the opening 51.
- the slit portion 52 may have a width that is the same as the diameter of the opening 51.
- FIG. 2A is a plan view showing a configuration in the vicinity of the opening 51 formed in the metal casing.
- FIG. 2B is a cross-sectional view taken along the line BB in FIG.
- the camera module 11 includes a lens 1, a lens holder 2 that holds the lens 1, an image sensor 3 that converts an image formed by the lens 1 into an electrical signal, and a substrate 4.
- the lens 1 and the image sensor 3 are arranged at a predetermined interval while facing each other.
- the substrate 4 has a hole through which light from the lens 1 passes.
- the image sensor 3 is face-down connected to the substrate 4 via solder bumps.
- the substrate 4 is provided between the lens holder 2 and the image sensor 3 and is attached to the lower part of the lens holder 2.
- the lens holder 2 is provided with a feeding coil 5 so as to wind around the optical axis of the lens 1. That is, the feeding coil 5 is wound around the outer peripheral surface of the cylindrical lens holder 2.
- the feeding coil 5 is wound with a plurality of turns (multilayer winding).
- the feeding coil 5 is provided between the lens 1 and the image sensor 3 in the direction in which the optical axis extends.
- the feeding coil 5 is provided in a space between the metal housing 50 and the substrate 4.
- the camera module 11 is held in a state where the tip of the lens holder 2 is inserted into the opening 51 of the metal housing 50. For example, the outer periphery at the tip of the lens holder 2 and the inner periphery of the opening 51 are bonded.
- the camera module 11 is shown in FIGS. Designed to be as shown.
- FIG. 3 is a cross-sectional view taken along the line CC in FIG.
- FIG. 4 is a perspective view of the camera module 11.
- the cable 6 is drawn from the substrate 4 of the camera module 11.
- the cable 6 includes a flexible portion 6f, a rigid portion 6r, and a receptacle 6c.
- a circuit board 21 inside the electronic device 101 is provided with a plug 22, a chip capacitor 23, an RFIC 24, and the like.
- the first end of the cable 6 is connected to the circuit on the image sensor 3 or the board 4 side, and the second end (receptacle 6c) opposite to the first end of the cable 6 is connected to the circuit on the circuit board 21 side.
- the cable 6 includes a plurality of signal lines, and the feeding coil 5 is connected to a part of the plurality of signal lines of the cable 6. Therefore, as shown in FIG. 3, only by attaching the receptacle 6c at the end of the cable of the camera module 11 to the plug 6c of the circuit board 21, the connection of the power supply coil 5 is performed simultaneously with the connection of the camera module.
- FIG. 5 is a circuit diagram of a high-frequency circuit including the feeding coil 5.
- a capacitor 23 is connected in parallel to the feeding coil 5 to form a resonance circuit, and this parallel circuit is connected to the RFIC 24. That is, the feeding coil 5 is directly connected to the RFIC 24 via the cable 6.
- the RFIC 24 corresponds to a “feed circuit” according to the present invention.
- the resonance circuit the inductance of the feeding coil 5 and the capacitance of the capacitor 23 are determined so as to resonate in the communication frequency band.
- the lens holder 2 can be used as a core material, and the positional deviation of the feeding coil 5 in the camera module 11 is small. Further, the size of the camera module is not increased, and a feeding coil having a large number of turns can be provided. Therefore, it is possible to configure a small camera module with an antenna having stable communication characteristics.
- FIG. 6A is a bottom (rear) view of the electronic apparatus 101
- FIG. 6B is a cross-sectional view of the BB portion in FIG. 6A, in particular, the metal casing 50 and the feeding coil 5.
- an electromagnetic field mainly a magnetic field
- the metal casing 50 is electromagnetically coupled (mainly magnetically coupled) with the feeding coil 5 and functions as a radiation element for HF band wireless communication.
- FIG. 7 is a cross-sectional view illustrating the structure of the camera module according to the second embodiment together with a part of the metal casing.
- the camera module 12 includes a lens 1, a lens holder 2 that holds the lens 1, an image sensor 3 that converts an image formed by the lens 1 into an electrical signal, and a substrate 4.
- the lens holder 2 is provided with a feeding coil 5 so as to wind around the optical axis of the lens 1.
- a magnetic member 7 is provided on the inner periphery of the power supply coil 5 (between the lens holder 2 and the power supply coil 5). That is, the magnetic member 7 is provided along the outer peripheral surface of the cylindrical lens holder 2, and the feeding coil 5 is wound along the outer peripheral surface of the magnetic member 7.
- the feeding coil 5 and the magnetic member 7 are provided in a space between the metal housing 50 and the substrate 4.
- the magnetic member 7 is a cylindrically molded resin material kneaded with a ferrite filler or a sintered ferrite molded into a cylindrical shape.
- the lens holder 2 and the substrate 4 are handled like a coil bobbin, and the feeding coil is wound over a plurality of layers.
- the inductance of the feeding coil 5 can be increased, and the feeding coil portion having a desired inductance can be reduced in size.
- FIG. 8 is a cross-sectional view illustrating the structure of the camera module according to the third embodiment together with a part of the metal casing.
- the camera module 13 includes a lens 1, a lens holder 2, an image sensor 3, and a substrate 4.
- a power supply coil 5 is provided around the lens holder 2 so as to wind around the optical axis of the lens 1.
- the feeding coil 5 is covered with a cover layer 8 having a low dielectric constant.
- the camera module 13 is held in a state where the tip of the lens holder 2 is inserted into the opening 51 of the metal housing 50.
- the cover layer 8 and the inner periphery of the opening 51 are bonded.
- the camera module 13 is attached to a circuit board (not shown) or a resin casing in the casing, and the state shown in FIG. 8 is obtained when the metal casing 50 is mounted on the resin casing 40. Designed to.
- the feeding coil 5 is arranged so that the winding width range extends inside and outside the metal casing 50. That is, the power supply coil 5 is wound around the lens holder 2 over both the outer side and the inner side of the metal housing 50. For this reason, even if there is variation in the amount of protrusion of the lens holder 2 from the opening 51 of the metal housing 50, there is little change in the facing interval or facing area between the power feeding coil 5 and the metal housing 50. There is little change in stray capacitance between the housing 50 and the housing 50. For this reason, there is little variation in the electrical characteristics of the feeding coil 5 with respect to the above variation.
- the feeding coil 5 is covered with the cover layer 8 having a low dielectric constant, stray capacitance generated between the feeding coil 5 and the metal casing 50 can be reduced.
- FIG. 9 is a cross-sectional view illustrating the structure of a camera module according to the fourth embodiment together with a part of a metal casing.
- the camera module 14 includes a lens 1, a lens holder 2, an image sensor 3, and a substrate 4. Inside the substrate 4, a feeding coil 5 is formed so as to wind around the optical axis of the lens 1.
- the substrate 4 is a resin multilayer substrate, and a feeding coil 5 is formed in a winding pattern of a conductor inside.
- the feeding coil 5 is wound in a plurality of turns and in a plurality of layers.
- the feeding coil 5 is provided on the side close to the lens 1 in the thickness direction of the substrate 4. Thereby, since the power feeding coil 5 and the metal casing 50 can be arranged closer to each other, the current flowing through the power feeding coil 5 is easily induced in the metal casing 50.
- the power supply coil 5 can be incorporated into the camera module 14 by forming the substrate 4, and the manufacture thereof becomes easy.
- the number of parts can be reduced and the cost can be reduced.
- FIG. 10 is a cross-sectional view illustrating the structure of a camera module according to the fifth embodiment together with a part of a metal housing.
- the camera module 15 includes a lens 1, a lens holder 2, an image sensor 3, a substrate 4, and a flexible multilayer substrate 9. Inside the flexible multilayer substrate 9, a power supply coil 5 is formed so as to be wound around the optical axis of the lens 1.
- the flexible multilayer substrate 9 and the inner surface of the metal housing 50 are bonded via an adhesive member 30. Since the flexible multilayer substrate 9 is flexible (has flexibility), it can be bonded even if the inner surface of the metal casing 50 is curved or has a certain level of difference in level.
- FIG. 11A is a cross-sectional view of each part of the camera module 15 before assembly
- FIG. 11B is a cross-sectional view after assembly.
- the lens holder 2 is inserted into the opening 51 of the metal casing 50 to position the camera module 15 with respect to the metal casing 50, and the adhesive member 30 is moved. Then, the flexible multilayer substrate 9 is attached to the inner surface of the metal casing 50.
- FIG. 12 is a cross-sectional view illustrating the structure of a camera module according to the sixth embodiment together with a part of a metal housing.
- the camera module 16 includes a lens 1, a lens holder 2, an image sensor 3, and a substrate 4.
- a power feeding coil chip component 57 is mounted on the substrate 4.
- the feeding coil chip component 57 is a coil component in which the feeding coil 5 is wound around a magnetic member 7 such as a ferrite core.
- the power supply coil 5 may be formed as a surface mount component (chip component).
- the feeding coil chip component 57 is mounted on the surface (upper surface) of the substrate 4 on the metal housing 50 side.
- the feeding coil chip component 57 is in contact with the lower end (the substrate 4) of the lens 1 and the lens holder 2 in the direction (height direction) in which the optical axis of the lens 1 extends in the space between the image sensor 3 and the lens 1. It is arrange
- FIG. 13 is a cross-sectional view illustrating the structure of a camera module and an electronic device according to the seventh embodiment.
- the camera module 17 includes a lens 1, a lens holder 2, an image sensor 3, and a substrate 4.
- a feeding coil 5 is provided around the lens holder 2.
- a chip capacitor 23 is mounted on the substrate 4.
- a plug 22, a chip capacitor 25, an RFIC 24, and a coupling coil 26 are mounted on a circuit board 21 in the electronic device.
- the configuration shown in FIG. 3 in the first embodiment supplies power directly to the feeding coil 5, but in this embodiment, direct coupling is not performed, and the coupling coil that is magnetically coupled to the feeding coil 5 is used.
- 26. A chip capacitor 23 is mounted on the substrate 4 of the camera module 17.
- a broken line in FIG. 13 is a line of magnetic force indicating a state of magnetic field coupling between the coupling coil 26 and the feeding coil 5.
- FIG. 14 is a circuit diagram of an antenna device including the feeding coil 5 and the coupling coil 26.
- a capacitor 23 is connected in parallel to the feeding coil 5 to form a resonance circuit.
- a capacitor 25 is connected in parallel to the coupling coil 26 to form a resonance circuit.
- This parallel circuit is connected to the RFIC 24. That is, the power feeding coil 5 is indirectly connected to the RFIC 24 through magnetic field coupling with the coupling coil 26.
- the inductance of the feeding coil 5, the inductance of the coupling coil 26, the capacitance of the capacitor 23, and the capacitance of the capacitor 25 are determined so that the two resonance circuits resonate in the communication frequency band.
- FIG. 15 is a cross-sectional view illustrating the structure of a camera module and an electronic device according to the eighth embodiment.
- the camera module 18 includes a lens 1, a lens holder 2, an image sensor 3, and a substrate 4.
- a feeding coil 5 is provided around the lens holder 2.
- a chip capacitor 23 and an RFIC 24 are mounted on the substrate 4.
- the chip capacitor 23 is mounted on the surface (lower surface) of the substrate 4 opposite to the metal housing 50.
- the chip capacitor 23 is disposed at the height position of the image sensor 3 in the direction (height direction) in which the optical axis of the lens 1 extends in the space between the image sensor 3 and the lens 1.
- the RFIC 24 is mounted on the surface (upper surface) of the substrate 4 on the metal housing 50 side.
- the RFIC 24 includes a lens 1 and a lower end of the lens holder 2 (an end portion in contact with the substrate 4) in a direction (height direction) in which the optical axis of the lens 1 extends in a space between the image sensor 3 and the lens 1. It is arranged at the height position between. Note that the chip capacitor 23 and the RFIC 24 may be provided on the upper surface and the lower surface of the substrate 4, respectively, or both may be provided on the same surface of the substrate 4.
- the power supply coil 5 but also a communication circuit may be provided in the camera module.
- FIG. 16 is a cross-sectional view illustrating the structure of an electronic apparatus including the camera module 19 according to the ninth embodiment. Unlike the camera module 11 shown in FIG. 2B in the first embodiment, the camera module 19 includes a magnetic sheet 10. Other configurations are as described in the first embodiment.
- the magnetic sheet 10 is a sheet in which a resin material kneaded with a ferrite filler is formed into a sheet shape and an insertion port for the lens holder 2 is formed.
- the magnetic sheet 10 may be a sintered ferrite plate.
- the planar shape of the magnetic material sheet 10 is substantially equal to the planar shape of the substrate 4, and the magnetic material sheet 10 is provided on the upper surface of the substrate 4. In addition, the magnetic sheet 10 is disposed between the feeding coil 5 and the substrate 4.
- the magnetic sheet 10 is disposed between the power supply coil 5 and the substrate 4, unnecessary coupling between the circuit configured on the substrate 4 and the power supply coil 5 is suppressed. For this reason, for example, noise due to a digital signal generated by a circuit configured on the substrate 4 is prevented from being superimposed on the feeding coil, and wireless communication using a weak magnetic field using the feeding coil 5 is not adversely affected.
- the magnetic sheet 10 shields the magnetic field generated by the feeding coil 5 when viewed from the substrate 4. Therefore, an eddy current is prevented from flowing through the conductor of the substrate 4 due to the magnetic field generated by the feeding coil 5.
- the magnetic sheet 10 is integrally provided with the power supply coil 5 in the camera module 19, variations in the relative position of the magnetic sheet 10 with respect to the substrate 4 and the power supply coil 5 are suppressed.
- the magnetic sheet 10 of this embodiment does not necessarily match the planar shape of the substrate 4. Any size and shape that can achieve the effects of unnecessary coupling and magnetic field shielding may be used.
- the housing is not limited to one made of only metal, and may be made of a plurality of materials such as a housing made of resin and metal foil.
- the casing of the camera module is not shown, but a case surrounding at least the substrate 4 and the image sensor 3 may be provided.
- the opening is preferably connected to the outer edge of the housing. That is, it is preferable that the opening is formed in a notch shape.
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Abstract
Description
給電回路が直接的または間接的に接続される給電コイルが搭載されていることを特徴とする。
前記カメラモジュールは、前記開口部から前記レンズが露出するように配置され、
前記カメラモジュールには、給電回路が直接的または間接的に接続される給電コイルが搭載され、
前記筐体と前記給電コイルとが電磁界結合することによって前記筐体が無線通信用の放射素子として作用することを特徴とする。
図1(A)は第1の実施形態に係るカメラモジュールを備えた電子機器101の上面(前面)図、図1(B)は電子機器101の下面(背面)図である。この電子機器101は例えば携帯電話端末やタブレット端末であり、NFC で通信を行う回路を備えている。
図7は第2の実施形態に係るカメラモジュールの構造を金属筐体の一部と共に表す断面図である。カメラモジュール12は、レンズ1、レンズ1を保持するレンズホルダー2、レンズ1による結像を電気信号に変換するイメージセンサ3および基板4を有する。レンズホルダー2には、レンズ1の光軸の周囲を巻回するように、給電コイル5が設けられている。更に、給電コイル5の内周部(レンズホルダー2と給電コイル5との間)に磁性部材7が設けられている。すなわち、円筒状のレンズホルダー2の外周面に沿って磁性部材7が設けられており、磁性部材7の外周面に沿って給電コイル5が巻回されている。給電コイル5および磁性部材7は、金属筐体50と基板4との間のスペースに設けられている。この磁性部材7はフェライトフィラーを混練した樹脂材料を円筒状に成形したもの、または円筒状に成型した焼結フェライトである。なお、本実施形態では、レンズホルダー2および基板4をコイルボビンのように扱って、給電コイルを複数層に亘って巻回している。
図8は第3の実施形態に係るカメラモジュールの構造を金属筐体の一部と共に表す断面図である。カメラモジュール13は、レンズ1、レンズホルダー2、イメージセンサ3および基板4を有する。レンズホルダー2の周囲には、レンズ1の光軸の周囲を巻回するように、給電コイル5が設けられている。そして、給電コイル5は低誘電率のカバー層8で被覆されている。
図9は第4の実施形態に係るカメラモジュールの構造を金属筐体の一部と共に表す断面図である。カメラモジュール14は、レンズ1、レンズホルダー2、イメージセンサ3および基板4を有する。基板4の内部には、レンズ1の光軸の周囲を巻回するように、給電コイル5が形成されている。
図10は第5の実施形態に係るカメラモジュールの構造を金属筐体の一部と共に表す断面図である。カメラモジュール15は、レンズ1、レンズホルダー2、イメージセンサ3、基板4およびフレキシブル多層基板9を有する。フレキシブル多層基板9の内部には、レンズ1の光軸の周囲を巻回するように、給電コイル5が形成されている。フレキシブル多層基板9と金属筐体50の内面とは接着部材30介して接着されている。フレキシブル多層基板9はフレキシブルである(可撓性を有する)ので、金属筐体50の内面が湾曲していても、またはある程度の段差があっても、貼り合わせることができる。
図12は第6の実施形態に係るカメラモジュールの構造を金属筐体の一部と共に表す断面図である。カメラモジュール16は、レンズ1、レンズホルダー2、イメージセンサ3、基板4を有する。基板4には給電コイルチップ部品57が実装されている。
図13は第7の実施形態に係るカメラモジュールおよび電子機器の構造を示す断面図である。カメラモジュール17は、レンズ1、レンズホルダー2、イメージセンサ3、基板4を有する。レンズホルダー2の周囲には給電コイル5が設けられている。基板4にはチップコンデンサ23が実装されている。
図15は第8の実施形態に係るカメラモジュールおよび電子機器の構造を示す断面図である。カメラモジュール18は、レンズ1、レンズホルダー2、イメージセンサ3、基板4を有する。レンズホルダー2の周囲には給電コイル5が設けられている。基板4にはチップコンデンサ23およびRFIC24が実装されている。チップコンデンサ23は、基板4の金属筐体50とは反対側の表面(下面)に実装されている。このチップコンデンサ23は、イメージセンサ3とレンズ1との間のスペースのうち、レンズ1の光軸が延びる方向(高さ方向)において、イメージセンサ3の高さ位置に配置されている。RFIC24は、基板4の金属筐体50側の表面(上面)に実装されている。このRFIC24は、イメージセンサ3とレンズ1との間のスペースのうち、レンズ1の光軸が延びる方向(高さ方向)において、レンズ1とレンズホルダー2の下端(基板4に接する端部)との間の高さ位置に配置されている。なお、チップコンデンサ23およびRFIC24を、それぞれ、基板4の上面および下面に設けてもよいし、両方を基板4の同じ面上に設けてもよい。
図16は、第9の実施形態に係るカメラモジュール19を備えた電子機器の構造を示す断面図である。カメラモジュール19は、第1の実施形態で図2(B)に示したカメラモジュール11と異なり、磁性体シート10を備える。その他の構成は第1の実施形態で示したとおりである。
また、以上に示した各実施形態では、金属筐体を備えた例を示したが、金属に限らず、導電性を有する筐体であれば、たとえば、導電性を有する炭素繊維からなる筐体など、それを通信用の放射素子として利用することができる。なお、筐体は、金属のみで構成されるものに限らず、たとえば、樹脂と金属箔とで構成された筐体など、複数材料により構成されたものであってもよい。
2…レンズホルダー
3…イメージセンサ
4…基板
5…給電コイル
6…ケーブル
6c…プラグ
6c…レセプタクル
6f…フレキシブル部
6r…リジッド部
7…磁性部材
8…カバー層
9…フレキシブル多層基板
10…磁性体シート
11~19…カメラモジュール
21…回路基板
22…プラグ
23…コンデンサ
24…RFIC
25…コンデンサ
26…結合用コイル
30…接着部材
40…樹脂筐体
50…金属筐体
51…開口部
52…スリット部
57…給電コイルチップ部品
60…ディスプレイ
70…操作ボタン
101…電子機器
Claims (10)
- レンズ、および前記レンズによる結像を電気信号に変換するイメージセンサを有し、電子機器の導電性を有する筐体に形成された開口部から前記レンズが露出するように配置されるカメラモジュールにおいて、
給電回路が直接的または間接的に接続される給電コイルが搭載されていることを特徴とするカメラモジュール。 - 前記給電コイルは、前記レンズの光軸方向において、前記イメージセンサと前記レンズとの間のスペースに配置されている、請求項1に記載のカメラモジュール。
- 前記レンズを保持するレンズホルダーをさらに有し、
前記給電コイルは、前記レンズの光軸の周囲を巻回するように、前記レンズホルダーに設けられた、請求項1または2に記載のカメラモジュール。 - 基板をさらに有し、
前記基板と前記給電コイルとの間に磁性体シートが設けられた、請求項3に記載のカメラモジュール。 - 基板をさらに有し、
前記給電コイルは、前記レンズの光軸の周囲を巻回するように、前記基板に設けられた、請求項1~3のいずれかに記載のカメラモジュール。 - 基板をさらに有し、
前記給電コイルは、導体の巻回パターンを有するチップ部品に構成されていて、前記基板に配置された、請求項1~3のいずれかに記載のカメラモジュール。 - 第1端が前記イメージセンサ側の回路に接続され、前記第1端とは反対側の第2端が電子機器側の回路に接続される、複数の信号線を有するケーブルを備え、
前記給電コイルは前記ケーブルの複数の信号線のうち一部に接続される、請求項1~6のいずれかに記載のカメラモジュール。 - 開口部を有する導電性の筐体と、レンズおよび前記レンズによる結像を電気信号に変換するイメージセンサを有するカメラモジュールとを備える電子機器において、
前記カメラモジュールは、前記開口部から前記レンズが露出するように配置され、
前記カメラモジュールには、給電回路が直接的または間接的に接続される給電コイルが搭載され、
前記筐体と前記給電コイルとが電磁界結合することによって前記筐体が無線通信用の放射素子として作用することを特徴とする電子機器。 - 前記カメラモジュールは、前記レンズを保持するレンズホルダーをさらに有し、
前記給電コイルは、前記レンズの光軸の周囲を巻回するように前記レンズホルダーに設けられ、且つ前記給電コイルは前記筐体の内外に亘る位置に配置されている、請求項8に記載の電子機器。 - 前記給電コイルと磁界結合する結合用コイルを備え、
前記給電コイルは、前記結合用コイルを介して前記給電回路に間接的に接続されている、請求項8または9に記載の電子機器。
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