Sensor and electronic device

An electronic device includes: a housing; a sensor provided on an inner surface of the housing and configured to detect deformation of the housing; and a control unit configured to control an operation of the electronic device on the basis of a detection result of the sensor. The sensor has a first sensing unit configured to detect a prescribed user operation and a second sensing unit configured to compensate for a malfunction.

TECHNICAL FIELD

The present disclosure relates to a sensor and an electronic device.

BACKGROUND ART

In recent years, electronic devices that can detect pressing on a surface of a housing have been proposed. For example, as one of such electronic devices, Patent Document 1 proposes one including a sheet-shaped pressure-sensitive sensor on an inner surface of a housing. As the pressure-sensitive sensor, there is used one provided with a conductive layer, a sensor layer including a plurality of sensor units, and a space layer provided between the conductive layer and the sensor layer.

CITATION LIST

Patent Document

SUMMARY OF THE INVENTION

Problems to be Solved by the Invention

However, in the electronic device described in Patent Document 1, there is a possibility that the electronic device malfunctions in a case where an unintended deformation (for example, twisting or bending) is applied to the housing or in a case where an unintended position of the housing is pressed.

An object of the present disclosure is to provide a sensor and an electronic device that can suppress a malfunction.

Solutions to Problems

In order to solve the above-described problem, a first disclosure is an electronic device including: a housing; a sensor provided on an inner surface of the housing and configured to detect deformation of the housing; and a control unit configured to control an operation of the electronic device on the basis of a detection result of the sensor. The sensor has a first sensing unit configured to detect a prescribed user operation and a second sensing unit configured to compensate for a malfunction.

A second disclosure is an electronic device including: a housing; a sensor provided in the housing and configured to detect deformation of the housing; and a control unit configured to control an operation of the electronic device on the basis of a detection result of the sensor. The sensor has a first sensing unit configured to detect a prescribed user operation and a second sensing unit configured to compensate for a malfunction.

A third disclosure is a sensor provided on an inner surface of a housing and configured to detect deformation of the housing. The sensor has a first sensing unit configured to detect a prescribed user operation and a second sensing unit configured to compensate for a malfunction.

A fourth disclosure is a sensor provided in a housing and configured to detect deformation of the housing. The sensor has a first sensing unit configured to detect a prescribed user operation and a second sensing unit configured to compensate for a malfunction.

Effects of the Invention

According to the present disclosure, a malfunction of the electronic device can be suppressed. Note that the effects described herein are not necessarily limited, and any of the effects described in the present disclosure or an effect different from those is possible.

MODE FOR CARRYING OUT THE INVENTION

Embodiments of the present disclosure will be described in the following order. Note that, in all the drawings of the following embodiments, the same or corresponding parts are denoted by the same reference numerals.

1 First embodiment (example of electronic device)

2 Second embodiment (example of electronic device)

3 Third embodiment (example of electronic device)

1 First Embodiment

[Configuration of Electronic Device]

FIG. 1shows a configuration of an electronic device10according to a first embodiment. The electronic device10according to the first embodiment is a so-called smartphone, and includes: a housing11as an exterior body having a thin box shape with one main surface opened; a board12accommodated in the housing11; and a front panel13provided so as to close the one opened main surface.

The housing11includes a rectangular plate-shaped bottom part11M forming a back surface of the electronic device10, and a wall part11N provided on a periphery of the bottom part11M. The wall part11N stands upright with respect to the bottom part11M, and has side wall parts11R and11L provided on both long edge sides of the bottom part11M. A thickness of the housing11is preferably 1 mm or more, for example, 1.08 mm or 1.4 mm.

An outer surface11SA of the side wall part11R has buttons BT1, BT2, and BT3provided to be aligned in one line in a length direction of the side wall part11R (that is, a circumferential direction of the wall part11N). Each position of the buttons BT1, BT2, and BT3is provided with a depression. The buttons BT1, BT2, and BT3are, for example, a volume down button, a volume up button, and a power button, respectively.

As shown inFIGS. 2, 3A, and 3B, the housing11includes a groove part14provided along an inner surface11SB of the side wall part11R. This groove part14accommodates an elongated sensor20having a film shape, a long elastic body51having a film shape, and a long spacer52having a film shape such that individual main surfaces thereof are parallel to the inner surface11SB. Note that, in the present disclosure, the film also includes a sheet. Furthermore, at least one of the sensor20, the elastic body51, or the spacer52may have a plate shape.

In the groove part14, the sensor20, the elastic body51, and the spacer52are layered in the order of the sensor20, the elastic body51, and the spacer52in a direction away from the inner surface11SB side. The elastic body51may be bonded to the sensor20with an adhesive layer such as a double-sided adhesive tape and the like. Note that, in the present specification, a longitudinal direction of the sensor20is referred to as a ±X-axis direction, a width direction (short direction) is referred to as a ±Y-axis direction, and a direction perpendicular to the longitudinal direction and the width direction (that is, a direction perpendicular to a sensing surface20S) is referred to as a ±Z-axis direction.

The sensor20is an electrostatic capacity type pressure-sensitive sensor. In the first embodiment, a pressure-sensitive sensor of a mutual-capacitance type is used as the an electrostatic capacity type pressure-sensitive sensor. As shown inFIG. 4, the sensor20has an elongated rectangular shape, and a connecting part41is extended from a center of one long edge of the sensor20. As shown inFIG. 2, a connector42is provided at a tip end of the extended connecting part41, and this connector42is connected to a connector (not shown) provided on the board12. One main surface of the sensor20is the sensing surface20S configured to detect pressing, and the sensor20is accommodated in the groove part14such that the sensing surface20S is pressed against the inner surface11SB. Note that, in the present specification, among the two main surfaces of the sensor20, a main surface on a side opposite to the sensing surface20S is referred to as a back surface.

The sensor20and the connecting part41are integrally configured by one FPC40having a T shape. By adopting such a configuration, the number of parts can be reduced. Furthermore, impact durability of the connection between the sensor20and the board12can be improved. However, the sensor20and the connecting part41may be configured separately. In a case of this configuration, the sensor20may be configured by, for example, a rigid board or a rigid flexible board.

FIG. 5Ais a plan view showing a configuration of the sensor20. As shown inFIG. 5A, the sensor20includes sensing units SE1to SE7arranged in one line with equal intervals in the longitudinal direction of the sensor20. However, the intervals between the sensing units SE1to SE7are not limited to equal intervals, and the arrangement may be with unequal intervals in accordance with desired characteristics. Note that, in the following description, the sensing units SE1to SE7may be referred to as a sensing unit SE in a case of not being particularly distinguished. Furthermore, there may be a case where detection signals detected respectively by the sensing units SE1to SE7are referred to as detection signals S1to S7.

The sensing units SE2, SE4, and SE6each are first sensing units (hereinafter may also be referred to as “sensing units for user operation detection”) for detection of a user operation (prescribed user operation) by pressing of the buttons BT1, BT2, and BT3. The sensing units SE1, SE3, SE5, and SE7each are second sensing units (hereinafter, may also be referred to as “sensing units for malfunction compensation”) for compensation for a malfunction of the electronic device10. The sensing unit SE3for malfunction compensation is provided between the adjacent sensing units SE2and SE4for user operation detection. Furthermore, the sensing unit SE5for malfunction compensation is provided between the adjacent sensing units SE4and SE6for user operation detection.

The sensing units SE2, SE4, and SE6are provided at positions corresponding to the buttons BT1, BT2, and BT3, respectively, and detect pressing of the buttons BT1, BT2, and BT3. The sensing units SE3and SE5are provided at positions corresponding to between the buttons BT1and BT2and between the buttons BT2and BT3, respectively, and detect pressing between the buttons BT1and BT2and pressing between the buttons BT2and BT3. The sensing unit SE1is provided at a position opposite to the button BT2among positions on both sides of the button BT1, and the sensing unit SE7is provided at a position on a side opposite to the button BT2among positions on both sides of the button BT3. Therefore, pressing is detected at positions outside the both ends of the buttons BT1, BT2, and BT3arranged in one line.

FIG. 5Bis a cross-sectional view showing a configuration of the sensor. The sensor20includes a sensor electrode layer30having sensing units SE1to SE7, metal layers21and22, a plurality of supports23having a columnar shape, and an adhesive layer24. A width of the sensor20is preferably about 2 mm or more and about 4 mm or less, for example, about 2.5 mm. A thickness of the sensor20including a mounting structure is preferably 2 mm or less, for example 1.53 mm.

The metal layer21and the sensor electrode layer30are arranged such that main surfaces of the metal layer21and the sensor electrode layer30face each other. The plurality of supports23is provided between the main surfaces of the metal layer21and the sensor electrode layer30, and support the metal layer21on one main surface of the sensor electrode layer30such that the metal layer21and the sensor electrode layer30are separated from each other. The plurality of supports23forms a support layer between the main surfaces of the metal layer21and the sensor electrode layer30.

The metal layer22and the sensor electrode layer30are arranged such that main surfaces of the metal layer22and the sensor electrode layer30face each other. The adhesive layer24is provided between the metal layer22and the sensor electrode layer30, and bonds the metal layer22and the sensor electrode layer30together.

The sensor20further includes: a first conductive member such as an anisotropic conductive film (ACF) that connects a first ground pad of the sensor electrode layer30and the metal layer21; and a second conductive member such as an ACF that connects a second ground pad of the sensor electrode layer30and the metal layer22. The metal layer21is grounded via the first conductive member and the first ground pad, and is set to a ground potential. Furthermore, the metal layer22is grounded via the second conductive member and the second ground pad, and is set to a ground potential.

The metal layers21and22are so-called reference electrodes, and are grounded and set to a ground potential. The metal layers21and22are, for example, metal plates having a flexibility. The metal layers21and22include, for example, a single component such as aluminum, titanium, zinc, nickel, magnesium, copper, and iron, or an alloy containing two or more of these. Specific examples of the alloy include stainless steel (SUS), aluminum alloy, magnesium alloy, titanium alloy, and the like.

The plurality of supports23is arranged in one line with predetermined intervals in the longitudinal direction of the sensor20such that the metal layer21can be supported at positions corresponding to both ends of the sensing unit SE. Specifically, the support23is provided so as to be placed on a position between adjacent sensing units SE in a thickness direction (Z-axis direction) of the sensor20. The support23is made by, for example, an adhesive or a double-sided adhesive tape having insulating properties. As the adhesive, for example, an ultraviolet curable resin, a thermosetting resin, and the like can be used. The support23may be elastically deformed by pressure applied to the sensing surface20S.

The adhesive layer24is an example of a support layer. The adhesive layer24bonds the metal layer22and the sensor electrode layer30together, and supports the sensor electrode layer30on one main surface of the metal layer22such that the metal layer22and the sensor electrode layer30are separated from each other. The adhesive layer24is made by, for example, an adhesive or a double-sided adhesive tape having insulating properties. The adhesive layer24may be elastically deformed by pressure applied to the sensing surface20S. Specific examples of the double-sided adhesive tape include a double-sided tape under the trade name Neo Fix manufactured by Nichiei Kakoh Co., Ltd. Note that, in the present specification, a pressure sensitive adhesion is defined as a kind of adhesion. According to this definition, a pressure sensitive layer is regarded as a kind of adhesive layer.

As shown inFIG. 6, the sensor electrode layer30includes a base material31, and first and second electrodes32and33provided on one main surface of the base material31. These first and second electrodes32and33form a sensing unit SE. Furthermore, the sensor electrode layer30includes a linear ground electrode34provided on one main surface of the base material31so as to surround a periphery of the sensing units SE1to SE7. Moreover, the sensor electrode layer30may include an insulating layer (not shown) such as a coverlay film covering the first and second electrodes32and33and the ground electrode34on one main surface of the sensor electrode layer30.

The first and second electrodes32and33have a comb-teeth shape, and are arranged so as to mesh the comb-teeth portions. Specifically, the first electrode32includes a plurality of sub-electrodes32A having a linear shape. The second electrode33includes a plurality of sub-electrodes33A having a linear shape. The plurality of sub-electrodes32A and33A is extended in the X-axis direction and are alternately spaced apart with a predetermined interval in the Y-axis direction. Adjacent sub-electrodes32A and33A are configured to be capable of forming capacitive coupling.

The adjacent sub-electrodes32A and33A can operate as two electrodes of a mutual-capacitance type, or can also operate as one electrode of a self-capacitance type. Furthermore, it is possible to use as a resonance capacitor of a sensing and LC resonance circuit by utilizing electrostatic capacity caused by the coupling between the adjacent sub-electrodes32A and33A.

In the mutual-capacitance type, an IC12A detects proximity of the metal layer21to the sensing unit SE, through an electrostatic capacity change of the sensing unit SE, specifically, an electrostatic capacity change between the first and second electrodes32and33. Note that, the IC12A detects the proximity of the metal layer21to the sensing unit SE as a decrease in electrostatic capacity between the first and second electrodes32and33.

The elastic body51is configured to be elastically deformable by pressure applied to the side wall part11R. Since the elastic body51is sandwiched between the back surface of the sensor20and the spacer52, a dynamic range in the load sensitivity of the sensor20can be improved.

The elastic body51includes, for example, a dielectric such as foamed resin or insulating elastomer. The foamed resin is a so-called sponge, and is at least one of, for example, foamed polyurethane, foamed polyethylene, foamed polyolefin, or sponge rubber, and the like. The insulating elastomer is, for example, at least one of silicone-based elastomer, acrylic-based elastomer, urethane-based elastomer, or styrene-based elastomer, and the like. Note that the elastic body51may be provided on a base material (not shown).

A thickness of the elastic body51is preferably 10 μm or more and 1000 μm or less. If the thickness of the elastic body51is less than 10 μm, a function of the elastic body51may be deteriorated. Whereas, if the thickness of the elastic body51exceeds 1000 μm, the micro-deformation sensitivity may decrease.

Note that,FIG. 4shows an example in which the elastic body51has a film shape, and the elastic body51is provided on the entire back surface of the sensor20, but the shape of the elastic body51is not limited to this. The elastic body51may have a predetermined shape pattern and may be partially provided on the back surface of the sensor20. The shape pattern may be regular or irregular. Examples of the shape pattern include, for example, a stripe shape, a mesh shape, a radial shape, a geometric pattern shape, a meander shape, a concentric shape, a spiral shape, a spider web shape, a tree shape, a fish bone shape, a ring shape, a lattice shape, an irregular shape, and the like, but is not limited to these.

The spacer52is press-fitted between the elastic body51and an inner surface of the groove part14. Since the spacer52is press-fitted in this manner, a gap caused by dimensional variations (tolerances) of the groove part14, the sensor20, and the like can be suppressed. One end of the spacer52in the width direction (one end facing a bottom part of the groove part14) has a wedge shape in order to facilitate press-fitting. The spacer52has a higher elastic modulus than that of the elastic body51. The spacer52is, for example, a metal plate, a resin plate, laminated plate obtained by laminating them, and the like.

Among both main surfaces of the spacer52, on both ends of a main surface on a side facing an inner surface of the groove part14, protruding parts52A and52B are provided. These protruding parts52A and52B are fitted into recesses14A and14B provided at both ends of the groove part14, respectively.

The board12is a main board of the electronic device10, and includes a controller integrated circuit (IC) (hereinafter simply referred to as “IC”)12A and a main central processing unit (CPU) (hereinafter simply referred to as “CPU”)12B. The IC12A is a control unit configured to control the sensor20and detect pressure applied to the sensing surface20S. The CPU12B is a control unit configured to control the entire electronic device10. For example, the CPU12B executes various processes on the basis of a detection signal supplied from the IC12A.

The front panel13includes a display device13A, and an electrostatic capacity type touch panel is provided on a surface of the display device13A. The display device13A displays a video (screen) on the basis of a video signal and the like supplied from the CPU12B. Examples of the display device13A include, for example, a liquid crystal display, an electroluminescence (EL) display, and the like, but are not limited to these.

[Circuit Configuration of Electronic Device]

FIG. 7is a block diagram showing a circuit configuration of the electronic device according to the first embodiment. As shown inFIG. 7, the electronic device10includes a sensor20, a CPU12B, an IC12A, a GPS unit61, a wireless communication unit62, an audio processing unit63, a microphone64, a speaker65, and an NFC communication unit66, a power supply unit67, a storage unit68, a vibrator69, a display device13A, a motion sensor70, and a camera71.

The GPS unit61is a positioning unit that receives radio waves from a satellite of a system called global positioning system (GPS), and measures a current position. The wireless communication unit62performs short-range wireless communication with other terminals on the basis of, for example, a Bluetooth (registered trademark) standard. The NFC communication unit66performs wireless communication with a nearby reader/writer on the basis of a near field communication (NFC) standard. Data obtained by the GPS unit61, the wireless communication unit62, and the NFC communication unit66are supplied to the CPU12B.

The audio processing unit63is connected with the microphone64and the speaker65, and the audio processing unit63performs processing for calling with the other party connected by wireless communication through the wireless communication unit62and the like. Furthermore, the audio processing unit63can also perform processing for a voice input operation.

The power supply unit67supplies power to the CPU12B, the display device13A, and the like provided in the electronic device10. The power supply unit67includes a secondary battery such as a lithium ion secondary battery, and a charge/discharge control circuit configured to control charge/discharge of this secondary battery. Note that, although not shown inFIG. 7, the electronic device10includes a terminal for charging of the secondary battery.

The storage unit68is a random access memory (RAM) and the like, and stores various data such as an operating system (OS), an application, moving images, images, music, and documents.

The vibrator69is a member that vibrates the electronic device10. For example, the electronic device10vibrates the electronic device10with the vibrator69to notify reception of an incoming call, reception of an e-mail, and the like.

The display device13A displays various screens on the basis of a video signal and the like supplied from the CPU12B. Furthermore, a signal according to a touch operation on a display surface of the display device13A is supplied to the CPU12B.

The motion sensor70detects movement of a user holding the electronic device10. As the motion sensor70, an acceleration sensor, a gyro sensor, an electronic compass, an atmospheric pressure sensor, and the like are used.

The camera71includes a lens group and an imaging element such as a complementary metal oxide semiconductor (CMOS), and captures an image such as a still image or a moving image on the basis of the control of the CPU12B. The captured still images, moving images, and the like are stored in the storage unit68.

The sensor20is a pressure sensor with high sensitivity and high position resolution, detects electrostatic capacity according to a pressing operation on the sensing surface20S, and outputs a corresponding output signal to the IC12A.

The IC12A stores firmware for controlling the sensor20, detects a change (pressure) in electrostatic capacity of each sensing unit SE included in the sensor20, and outputs a signal according to a result thereof to the CPU12B.

The CPU12B executes various processes on the basis of the detection signal supplied from the IC12A. Furthermore, the CPU12B processes data supplied from the GPS unit61, the wireless communication unit62, the NFC communication unit66, the motion sensor70, and the like.

[Relationship Between Various Deformations Applied to Housing and Detection Signal]

In a case where the button BT2at a prescribed pressing position is pressed as shown inFIG. 8A, a level of the detection signal S4of the sensing unit SE4corresponding to the button BT2exceeds a threshold A as shown inFIG. 8B, and becomes the highest among the respective detection signals S1to S7of the sensing units SE1to SE7.

As shown inFIG. 9A, in a case where bending is applied to the electronic device10, at least one detection signal among the respective detection signals S1to S7of the sensing units SE1to SE7exceeds a threshold -B, as shown inFIG. 9B. Furthermore, also in a case where twisting is applied to the electronic device10as shown inFIG. 10A, at least one detection signal among the detection signals S1to S7of the sensing units SE1to SE7exceeds the threshold -B, as shown inFIG. 10B.

In a case where a portion between buttons BT2and BT3is pressed as shown inFIG. 11A, the detection signal S5of the sensing unit SE5corresponding to the position between the buttons BT2and BT3exceeds the threshold A as shown inFIG. 11B, and becomes the highest among the respective detection signals S1to S7of the sensing units SE1to SE7.

[Operation of Electronic Device]

With reference toFIG. 12, an operation of the electronic device10according to the first embodiment will be described.

First, in step S11, the IC12A sequentially scans the sensing units SE1to SE7, acquires the respective detection signals S1to S7of the sensing units SE1to SE7, and supplies to the CPU12B.

Next, in step S12, the CPU12B determines whether or not at least one signal among the detection signals S1to S7supplied from the IC12A exceeds the threshold -B. Note that, the threshold -B is opposite in polarity to the threshold A for determining pressure of the buttons BT1, BT2, and BT3at prescribed pressing positions. In a case where it is determined in step S12that at least one signal among the detection signals S1to S7exceeds the threshold -B (seeFIGS. 9B and 10B), the CPU12B determines in step S13that bending or twisting (seeFIGS. 9A and 10A) has been applied to the electronic device10. Then, in step S14, the CPU12B displays a screen (seeFIG. 13A) that gives warning, on the display device13A, to the user that bending or twisting has been applied to the electronic device10, and returns the process to step S11. Note that an image data related to the warning screen described above is stored in the storage unit68, and this image data is read out by the CPU12B and displayed on the display device13A.

In a case where it is determined in step S12that at least one signal among the detection signals S1to S7does not exceed the threshold -B, the CPU12B determines in step S15whether or not at least one signal among the detection signals S1to S7supplied from the IC12A exceeds the threshold A.

In a case where it is determined in step S15that at least one signal among the detection signals S1to S7exceeds the threshold A, the CPU12B determines in step S16whether or not a detection signal with the highest signal level among the detection signals exceeding the threshold A corresponds to any of the sensing units SE2, SE4, and SE6(that is, the buttons BT1, BT2, and BT3). In a case where it is determined in step S15that at least one signal among the detection signals S1to S7does not exceed the threshold A, the CPU12B returns the process to step S11.

In a case where it is determined in step S16that the detection signal having the highest signal level corresponds to one of the sensing units SE2, SE4, and SE6(seeFIG. 8B), in step S17, the CPU12B executes processing corresponding to the sensing unit SE (seeFIG. 8A) in which a detection signal with the highest signal level is detected, among the sensing units SE2, SE4, and SE6.

In a case where it is determined in step S16that the detection signal having the highest signal level does not correspond to any of the sensing units SE2, SE4, and SE6(seeFIG. 11B), in step S18, the CPU12B determines that a prescribed position is not pressed, specifically, that a position corresponding to a portion between the buttons BT1and BT2or between the buttons BT2and BT3is pressed (seeFIG. 11A). Then, in step S19, the CPU12B displays a screen (seeFIG. 13B) that warns the user that the prescribed position is not pressed, specifically, that a portion between the button BT1, BT2or the button BT2, BT3is pressed, and returns the process to step S11. Note that an image data related to the warning screen described above is stored in the storage unit68, and this image data is read out by the CPU12B and displayed on the display device13A.

Effect

The electronic device10according to the first embodiment includes: the housing11; and the sensor20that is provided on the inner surface11SB of the side wall part11R and includes the plurality of sensing units SE configured to detect deformation of the side wall part11R. The plurality of sensing units SE includes the sensing units SE2, SE4, and SE6for detection of a prescribed user operation, and the sensing units SE1, SE3, SE5, and SE7for compensation for a malfunction of the electronic device10. Therefore, a malfunction of the electronic device10can be suppressed.

MODIFIED EXAMPLE

Modified Example 1

As shown inFIG. 14, the sensor20may include a plurality of supports25having a columnar shape, instead of the adhesive layer24. The plurality of supports25is provided between the main surfaces of the metal layer22and the sensor electrode layer30, and support the metal layer22on another main surface of the sensor electrode layer30such that the metal layer22and the sensor electrode layer30are separated from each other. The plurality of supports25forms a support layer between the main surfaces of the metal layer22and the sensor electrode layer30. The plurality of supports25each is provided at positions stacked with the plurality of supports23in the thickness direction of the sensor20. The support25is made by, for example, an adhesive or a double-sided adhesive tape having insulating properties. As the adhesive, for example, an ultraviolet curable resin, a thermosetting resin, and the like can be used. The support25may be elastically deformed by pressure applied to the sensing surface20S.

Furthermore, instead of the plurality of supports23, the sensor20may include an elastic layer that is elastically deformed by pressure applied to the sensing surface20S. This elastic layer includes a foamed resin, an insulating elastomer, and the like. The foamed resin is a so-called sponge, and is at least one of, for example, foamed polyurethane, foamed polyethylene, foamed polyolefin, or sponge rubber, and the like. The insulating elastomer is, for example, at least one of silicone-based elastomer, acrylic-based elastomer, urethane-based elastomer, or styrene-based elastomer, and the like.

Furthermore, the sensor20may include an elastic layer instead of the adhesive layer24. As a material of this elastic layer, a material similar to that of the elastic layer described above can be exemplified.

Modified Example 2

As shown inFIG. 15A, the sensor20may include a plurality of projections26on the sensing surface20S. The projections26are provided at positions corresponding to the sensing units SE2, SE4, and SE6for user operation detection. Specifically, the projections26are provided so as to be stacked with the sensing units SE2, SE4, and SE6in the thickness direction of the sensor20. Note that the projections26may be provided on the inner surface11SB of the side wall part11R, instead of the sensing surface20S.

Furthermore, as shown inFIG. 15A, the sensor20may include a plurality of projections27on a back surface. The projections27are provided at positions corresponding to the sensing units SE1, SE3, SE5, and SE7for malfunction compensation. Specifically, the projections27are provided so as to be stacked with the sensing units SE1, SE3, SE5, and SE7in the thickness direction of the sensor20. Note that the projections27may be provided on a surface of the elastic body51facing the back surface of the sensor20, instead of the back surface of the sensor20.

In a case where the housing11or the groove part14includes a metal, the sensor20need not include the metal layers21and22and the plurality of supports23and25as shown inFIG. 15B.

In the sensor having the configuration shown inFIG. 15A, as shown by arrows inFIG. 16A, in a case where the bottom part11M is pressed, a wall part14C facing the side wall part11R via the groove part14is deformed toward the side wall part11R. Therefore, the back surface of the sensor20is pressed through the projections27. Therefore, the IC12A detects increases in the respective detection signals S1, S3, S5, and S7in the sensing units SE1, SE3, SE5, and SE7for malfunction compensation (seeFIG. 16B). Therefore, the CPU12B determines whether or not the bottom part11M is deformed by determining whether or not at least one signal among the detection signals S1, S3, S5, and S7exceeds a threshold C. That is, the CPU12B can determine that the bottom part11M has been deformed in a case where at least one signal among the detection signals S1, S3, S5, or S7exceeds the threshold C, and can determine that the bottom part11M has not been deformed in a case where at least one signal among the detection signals S1, S3, S5, or S7does not exceed the threshold C.

Note that, also in a case where the electronic device10has been twisted, the wall part14C facing the side wall part11R via the groove part14is deformed toward the side wall part11R. Therefore, the CPU12B can also determine that the electronic device10has been twisted in a manner similar to the case where the bottom part11M is pressed.

Furthermore, in a case where any of the buttons BT1, BT2, and BT3is pressed, the sensing surface20S of the sensor20is pressed through the projection26. Therefore, the IC12A detects increases in the respective detection signals S2, S4, and S6in the sensing units SE2, SE4, and SE6for user operation detection. Therefore, the CPU12B can detect pressing of the buttons BT1, BT2, and BT3by determining whether or not there is a signal exceeding the threshold A among the detection signals S1to S7, and the signal exceeding the threshold A is a signal of any one of the sensing units SE2, SE4, and SE6.

Modified Example 3

The sensor20may also include a conductive base material instead of the metal layers21and22. The conductive base material includes a base material and a metal layer provided on one main surface of the base material. The base material has a plate shape or a film shape. As the conductive base material, a conductive film including a PET film and a metal layer (for example, Al-PET (registered trademark) manufactured by PANAC Corporation) is preferable. Furthermore, the sensor20may also include a conductive layer other than the metal layers21and22. As the conductive layer other than the metal layers21and22, for example, a film or a board containing at least one of carbon powder or metal powder can be used.

Modified Example 4

As shown inFIG. 17A, the IC12A may scan all the sensing units SE1to SE7in one cycle of scanning, but the scan operation of the IC12A is not limited to this. That is, as shown inFIG. 17B, while the IC12A scans all sensing units SE2, SE4, and SE6for user operation detection in one cycle of scanning, only one of the sensing units SE1, SE3, SE5, and SE7for malfunction compensation may be scanned in one cycle of scanning. In this case, the sensing units SE1, SE3, SE5, and SE7all are scanned by four times of scanning. By adopting the scan operation as shown inFIG. 17B, a scan time required for one cycle can be shortened.

Modified Example 5

In the first embodiment described above, a description has been made on a configuration in which the electronic device10includes the sensor20on the inner surface11SB of the side wall part11R. However, the electronic device10may include the sensors20and20on the inner surfaces11SB and11SB of the side wall parts11R and11L, respectively. Furthermore, the sensor20may be provided over the entire inner surface (inner peripheral surface) of the wall part11N. Furthermore, the sensor20may be provided on an inner surface of the bottom part11M of the housing11, or the sensor20may be provided on an inner surface of the front panel13.

Modified Example 6

As shown inFIGS. 18A and 18B, the electronic device10may include a supporting member53configured to support the sensor20and the elastic body51such that main surfaces thereof each are parallel to the inner surface11SB, and press the sensor20against the inner surface11SB via the elastic body51. In this case, the projections26may be provided on the sensing surface20S of the sensor20.

The housing11is provided with holes55A and55B separated by a predetermined interval, in the vicinity of the inner surface11SB of the side wall part11R. The supporting member53has a long plate shape, and provided with through holes53A and53B at both ends of the supporting member53in the longitudinal direction. The supporting member53is fixed in the vicinity of the inner surface11SB by fixing screws54A and54B to the holes55A and55B so as to pass through the through holes53A and53B, respectively.

Modified Example 7

As shown inFIG. 19A, a sensor20A may include: first and second sensing unit rows20L1and20L2for malfunction compensation; and a sensing unit row20L3for user operation detection provided between the first and second sensing unit rows20L1and20L2for malfunction compensation.

The first sensing unit row20L1is configured by sensing units20SE1for malfunction compensation aligned in one line with a predetermined interval in the X-axis direction, and the second sensing unit row20L2is configured by sensing units20SE2for malfunction compensation aligned in one line with a predetermined interval in the X-axis direction. The sensing unit row20L3is configured by sensing units20SE3for malfunction compensation aligned in one line with a predetermined interval in the X-axis direction. The sensing unit20SE1and the sensing unit20SE2are arranged to face each other in the Y-axis direction. The sensing unit20SE3is arranged so as not to overlap with the sensing units20SE1and20SE2in the Y-axis direction.

The sensing units20SE1and20SE2have a rectangular shape, and are arranged such that long edges thereof are parallel to the X axis. Whereas, the sensing unit20SE3has a square shape or a substantially square shape, and is arranged such that a pair of opposing edges are parallel to the X axis. An area of the sensing unit20SE3is larger than areas of the sensing units20SE1and20SE2.

Modified Example 8

As shown inFIG. 19B, a sensor20B may have a plurality of sensing units SE arranged two-dimensionally in a matrix. Here, a case is described where the sensing units are arranged in a matrix of three rows and seven columns, but the number of rows and the number of columns are not limited to this. Hereinafter, a sensing unit SE arranged at a position of n-row and m-column is referred to as an SE (n, m).

An SE (2,2), an SE (2,4), and an SE (2,6) are sensing units SEAfor user operation detection. A sensing unit SE (n, m) other than the SE (2,2), the SE (2,4), and the SE (2,6) is a sensing unit SEBfor malfunction compensation.

When there are the sensing units SEBfor malfunction compensation on both sides in the X-axis direction of the sensing unit SEAfor user operation detection, a degree of deformation at positions on both sides of the sensing unit SEAcan be confirmed. Therefore, it is possible to improve the detection accuracy for twisting or bending of the electronic device10or pressing at an unintended position.

Modified Example 9

In a case of using a sensor20where a plurality of sensing units SE is two-dimensionally arranged in a matrix, the IC12A may be capable of detecting multi-touch on the sensor20. For example, in a case where 16 pieces of X electrode (first electrode) and 10 pieces of Y electrode (second electrode) are arranged orthogonally, 160 pieces of the sensing unit SE arranged in a matrix can be configured, enabling sensing of proximity of the metal layer21by each sensing unit SE.

When both main surfaces of the sensor electrode layer30in which the X and Y electrodes are arranged in a matrix are covered with pressure-deformable metal layers21and22, and these metal layers21and22are grounded, the IC12A can sense pressure applied to the sensing surface20S. For example, since deformation of the metal layer21can be detected for every 160 pieces of the sensing unit SE, pressure of a plurality of pressure points, not only in the XY direction coordinates, but also in the Z direction can be detected. In the mutual-capacitance type, it is preferable that electric lines leak from the X and Y electrodes to the surroundings. As the X and Y electrodes that enable such a state, a comb-tooth shaped electrode and the like are preferable.

In the sensor20having the above-described configuration, some of the 160 pieces of the sensing unit SE is used for user operation detection, and the rest is used for malfunction compensation. Note that multi-touch (for example, a plurality of button presses) may be detected by the sensing unit SE for user operation detection.

Furthermore, the sensor20having the above-described configuration can be provided on any inner surface of the wall part11N and the bottom part11M of the housing11, but preferably provided on the inner surface of the bottom part11M from the viewpoint of an arrangement space.

Modified Example 10

As shown inFIG. 20A, a plurality of sensing unit pairs SP1for user operation detection and a plurality of sensing unit pairs20SP2for malfunction compensation may be provided, and the sensing unit pairs SP1and SP2may be alternately arranged. The sensing unit pair SP1includes two rectangular sensing units SEAfor user operation detection separated by a predetermined interval, and is arranged such that long edges of the sensing unit SEAare parallel to the Y axis. The sensing unit pair SP2includes two rectangular sensing units SEBfor malfunction compensation separated by a predetermined interval, and is arranged such that long edges of the sensing unit SEBare parallel to the X axis.

In a case where a position PA shown inFIG. 20Ais pressed, a level of detection signals of the sensing units (3) and (4) becomes high as shown inFIG. 20B. In a case where a position PB shown inFIG. 20Ais pressed, a level of a detection signal of the sensing unit (1) becomes high as shown inFIG. 20C.

Modified Example 11

In the first embodiment, a description has been made as an example on a configuration in which the outer surface11SA of the side wall part11R has the buttons BT1, BT2, and BT3at prescribed pressing positions (that is, positions corresponding to the sensing units SE2, SE4, and SE6), but the configuration that enables the prescribed pressing position to be tactilely grasped is not limited to this. For example, a protrusion may be provided at a prescribed pressing position. Furthermore, surface roughness of a prescribed pressing position and a peripheral portion thereof may be changed. For example, one of the prescribed pressing position and a peripheral portion thereof may be a rough surface, and the other may be a smooth surface. Furthermore, sensible temperature of the prescribed pressing position and the peripheral portion thereof may be changed. For example, one of the prescribed pressing position and the peripheral portion thereof may be made by metal, and the other may be made by a polymer resin.

Instead of enabling the prescribed pressing position to be tactilely grasped, it is also possible to enable the prescribed pressing position to be visually grasped, or the prescribed pressing position to be grasped tactilely and visually. In order to enable the prescribed pressing position to be visually grasped, for example, it is only required to print at least one of a symbol, a character, a mark, a pattern, or a color on the outer surface11SA. Furthermore, at least one of a symbol, a character, a mark, or a pattern may also be engraved on the outer surface11SA. For example, in a case of providing a volume button at a prescribed pressing position, it is only required to print or engrave a symbol “+” or “−” on the pressing portion.

Modified Example 12

A sensor120may further include an electrode unit for temperature detection configured to detect a temperature through an electrostatic capacity change. In this case, the IC12A may detect the temperature on the basis of an electrostatic capacity change of the electrode unit for temperature detection, and correct a threshold on the basis of the detected temperature. As the electrode unit for temperature detection, an electrode unit having a configuration similar to that of the sensing units SE1to SE7may be used.

The board12may also further include a temperature detection unit. In this case, the IC13A may detect a temperature by the temperature detection unit and correct a threshold on the basis of the detected temperature.

Modified Example 13

The sensor20, the elastic body51, and the spacer52may be divided into a plurality of pieces in a length direction of the groove part14. Therefore, it is possible to suppress a measurement error of the sensor20due to twisting distortion applied to the housing11. Furthermore, a plurality of groove parts14may be provided, and the sensor20, the elastic body51, and the spacer52may be accommodated in the individual groove parts14.

Modified Example 14

In the sensor20, the sensing units SE to SE7of the sensor electrode layer30may be spiral coil wiring. In this case, the spiral coil wiring of the sensing units SE to SE7detects deformation of metal layers121and122by fluctuation of a magnetic field rather than an electric field.

Modified Example 15

The CPU12B may switch between operation and non-operation of the sensor20as follows. That is, on the basis of a detection signal supplied from the touch panel of the display device13A, CPU12B determines whether or not the detection signal exceeds a threshold within a range equal to or larger than a prescribed area of the display surface of the display device13A. In a case where it is determined that the detection signal exceeds the threshold within a range equal to or larger than the prescribed area, the CPU12B inhibits operation of the sensor20provided on the side wall part11R. Whereas, in a case where it is determined that the detection signal does not exceeds the threshold within a range equal to or larger than the prescribed area, the CPU12B causes operation of the sensor20provided on the side wall part11R. By switching between operation and non-operation of the sensor20in this manner, a malfunction of the electronic device10can be further suppressed.

Modified Example 16

The CPU12B may perform authentication such as person identification on the basis of a pressure distribution (electrostatic capacity distribution) pattern supplied from the IC12A. In this case, the CPU12B makes the electronic device10usable in a case where authentication such as person identification can be made, while the CPU12B may not make the electronic device10usable in a case where authentication such as person identification cannot be made.

Modified Example 17

In the first embodiment described above, a case has been described where the sensor20is the mutual-capacitance type, but the sensor20may be a self-capacitance type.

FIG. 21shows a configuration of a sensor electrode layer30A of a self-capacitance type. The sensor electrode layer30A includes a base material31and a plurality of thin film electrodes35provided on one main surface of the base material31, and the electrodes35each form a sensing unit SE. The electrode35has a shape obtained by linearly cutting corner portions of a rectangular shape. A cut-off angle θ is 45 degrees, for example. Note that a shape of the electrode35is not limited to this, and may be a shape in which a rectangular corner portion is an R shape, a polygonal shape such as a rectangular shape, a circular shape, an elliptical shape, or an irregular shape, and the like.

Furthermore, the sensor electrode layer30A includes a plurality of pieces of wiring35A that electrically connects each electrode45to the connector42. In the sensor electrode layer30A of a self-capacitance type, the number of pieces of the required wiring35A is the number of sensing units SE desired to be individually sensed, that is, the number of electrodes (sensing electrodes)35for which an electrostatic capacity change is detected.

The wiring35A drawn at a right angle to an edge of the electrode35may be bent at a right angle to change the direction, but is preferably bent twice at an angle of 45 degrees to change the direction, as shown inFIG. 21. This is because a change in a width of the wiring35A can be suppressed, and generation of noise can be suppressed. Furthermore, in portions other than that described above, it is also preferable that the direction is changed by bending the wiring35A twice at an angle of 45 degrees, rather than being changed by bending at a right angle.

In the self-capacitance type, the IC12A detects proximity of the metal layer21through an electrostatic capacity change from each electrode35. The sensor20can also be regarded as a kind of capacitor that changes a shape thereof with pressure. The IC12A detects proximity of the metal layer (ground electrode)21to the electrode (sensing electrode)35as an increase in the electrostatic capacity of the electrode35. A capacity change amount of the sensor20with respect to pressing of the sensing surface20S can be easily adjusted on the basis of a distance and a dielectric constant between the metal layer21serving as a ground electrode and the electrode35serving as a sensing electrode, an area of the electrode35, and the like. In a case where the sensor20can detect multi-touch, the mutual-capacitance type is preferably used as the sensor20.

Modified Example 18

In the first embodiment described above, a case where the electronic device is a smartphone has been described as an example. However, the present disclosure is not limited to this, and can be applied to various electronic devices having an exterior body such as a housing. For example, the present disclosure is applicable to mobile phones other than smartphones, personal computers (for example, notebook PCs, tablet PCs, and the like), tablets, TVs, remote controllers, cameras, game devices, navigation systems, electronic books, electronic dictionaries, portable music players, wearable terminals such as smart watches and head-mounted displays, radios, stereos, medical devices, and robots.

The present disclosure is not limited to electronic devices, and can be applied to various devices other than electronic devices. For example, the present disclosure can be applied to electric devices such as electric tools, refrigerators, air conditioners, water heaters, microwave ovens, dishwashers, washing machines, dryers, lighting devices, and toys. Moreover, the present disclosure can be applied to buildings such as houses, building members, vehicles, furniture such as tables and desks, manufacturing apparatuses, analytical instruments, and the like. Examples of the building members include, for example, paving stones, wall materials, floor tiles, floor boards, and the like. Examples of the vehicles include, for example, motor vehicles (for example, automobiles, motorcycles, and the like), ships, submarines, railway vehicles, aircrafts, spacecrafts, elevators, play equipment, and the like.

2 Second Embodiment

[Configuration of Electronic Device]

FIG. 22shows a configuration of an electronic device110according to a second embodiment of the present disclosure. The electronic device110according to the second embodiment displays information13G corresponding to an operation button, at a position along an edge on a side wall part11R side in a screen13B, instead of an operation button being provided on the side wall part11R.

FIG. 23shows an arrangement example of a sensing unit SE of a sensor120. The sensor120has a plurality of sensing units SE arranged two-dimensionally in a matrix. Here, a case is described where the sensing units SE are arranged in a matrix of three rows and eleven columns, but the number of rows and the number of columns are not limited to this. Hereinafter, a sensing unit SE arranged at a position of n-row and m-column is referred to as an SE (n, m).

When an application is activated by a user, a CPU12B maps each operation of the activated application to the plurality of sensing units SE. Specifically, some of the plurality of sensing units SE is set as a sensing unit SEAfor application operation, and the remaining sensing units are set as a sensing unit SEBfor malfunction compensation. Note that a position of the sensing unit SEAfor application operation differs for each activated application.

Hereinafter, screen display and setting of the sensing unit SE in using a camera application, a music application, and a map application will be described. Note that the application is not limited to this, and the present disclosure can be applied to various applications such as a game application and a moving image or still image editing application.

FIG. 24Ashows a screen in using the camera application.FIG. 24Bshows mapping setting of the sensing unit SE in using the camera application. When the camera application is activated, the CPU12B sets some of the plurality of sensing units SE as sensing units SEAfor zoom-out operation detection, zoom-in operation detection, and shutter operation detection, and sets the rest to the sensing unit SEBfor malfunction compensation. Specifically, an SE (2,2), an SE (2,4), and an SE (2,10) are set as the sensing units SEAfor zoom-out operation detection, zoom-in operation detection, and shutter operation detection, respectively, while an SE (n, m) other than the SE (2,2), the SE (2,4), and the SE (2,10) is set as the sensing unit SEBfor malfunction compensation.

The CPU12B displays information13G corresponding to the zoom-out operation at a position corresponding to the SE (2,2) for zoom-out operation detection among positions on the side wall part11R side in the screen13B. The CPU12B displays information13G corresponding to the zoom-in operation at a position corresponding to the SE (2,4) for zoom-in operation detection among positions on the side wall part11R side in the screen13B. The CPU12B displays information13G corresponding to the shutter operation at a position corresponding to the SE (2,10) for shutter operation detection among positions on the side wall part11R side in the screen13B.

Note that data related to the information13G corresponding to each of the zoom-out operation, the zoom-in operation, and the shutter operation is stored in the storage unit68. As the camera application is activated, the CPU12B reads out the data related to the information13G from the storage unit68and displays on the screen13B.

FIG. 25Ashows a screen in using the music application.FIG. 25Bshows mapping setting of the sensing unit SE in using the music application. When the music application is activated, the CPU12B sets some of the plurality of sensing units SE as sensing units SEAfor fast-forward playback operation detection, pause operation detection, fast-reverse playback operation detection, volume up operation detection, and volume down operation detection, and sets the rest as the sensing unit SEBfor malfunction compensation. Specifically, an SE (2,1), an SE (2,3), an SE (2,5), an SE (2,9), and an SE (2,11) are set as the sensing units SEAfor fast-forward playback operation detection, pause operation detection, fast-reverse playback operation detection, volume up operation detection, and volume down operation detection, respectively, while an SE (n, m) other than the SE (2,1), the SE (2,3), the SE (2,5), the SE (2,9), and the SE (2,11) is set as the sensing unit SEBfor malfunction compensation.

The CPU12B displays information13G corresponding to the fast-forward playback operation at a position corresponding to the SE (2,1) for fast-forward playback operation detection among positions on the side wall part11R side in the screen13B. The CPU12B displays information13G corresponding to the pause operation at a position corresponding to the SE (2,3) for pause operation detection among positions on the side wall part11R side in the screen13B. The CPU12B displays information13G corresponding to the fast-reverse playback operation at a position corresponding to the SE (2,5) for fast-reverse playback operation detection among positions on the side wall part11R side in the screen13B. The CPU12B displays information13G corresponding to the volume up operation at a position corresponding to the SE (2,9) for volume up operation detection among positions on the side wall part11R side in the screen13B. The CPU12B displays information13G corresponding to the volume down operation at a position corresponding to the SE (2,11) for volume down operation detection among positions on the side wall part11R side in the screen13B.

Note that data related to the information13G corresponding to each of the fast-forward playback operation, the pause operation, the fast-reverse playback operation, the volume up operation, and the volume down operation is stored in the storage unit68. As the music application is activated, the CPU12B reads out the data related to the information13G from the storage unit68and displays on the screen13B.

FIG. 26Ashows a screen in using the map application.FIG. 26Bshows mapping setting of the sensing unit SE in using the map application. When the map application is activated, the CPU12B sets some of the plurality of sensing units SE as sensing units SEAfor zoom-out operation detection, zoom-in operation detection, and up/down and left/right scroll operation detection, and sets the rest to the sensing unit SEBfor malfunction compensation. Specifically, an SE (2,1), an SE (2,3), an SE (2,7), an SE (2,11), an SE (1,9), and an SE (3,9) are set as the sensing units SEAfor zoom-out operation, zoom-in operation, up scroll operation, down scroll operation, right scroll operation, and left scroll operation, respectively, while an SE (n, m) other than the SE (2,1), the SE (2,3), the SE (2,7), the SE (2,11), the SE (1,9), and the SE (3,9) is set as the sensing unit SEBfor malfunction compensation.

The CPU12B displays information13G corresponding to the zoom-out operation at a position corresponding to the SE (2,1) for zoom-out operation detection among positions on the side wall part11R side in the screen13B. The CPU12B displays information13G corresponding to the zoom-in operation at a position corresponding to the SE (2,3) for zoom-in operation detection among positions on the side wall part11R side in the screen13B. The CPU12B displays information13G corresponding to the up scroll operation and down scroll operation at positions respectively corresponding to the SE (2,7) and the SE (2,11) for up scroll operation detection and down scroll operation detection, among positions on the side wall part11R side in the screen13B. The CPU12B displays information13G corresponding to the right scroll operation and the left scroll operation at positions corresponding to the SE (1,9) and the SE (3,9) for right scroll operation detection and left scroll operation detection, among positions on the side wall part11R side in the screen13B.

Note that data related to the information13G corresponding to each of the zoom-out operation, the zoom-in operation, and the up/down and left/right scroll operation is stored in the storage unit68. As the map application is activated, the CPU12B reads out the data related to the information13G from the storage unit68and displays on the screen13B.

[Operation of Electronic Device]

With reference toFIG. 27, an operation of the electronic device according to the second embodiment will be described.

First, when an activation operation of an application is performed by the user in step S21, in step S22, the CPU12B determines whether or not an activation operation of the camera application has been performed.

In a case where it is determined in step S22that the activation operation of the camera application has been performed, in step S23, the CPU12B performs mapping setting of each operation (zoom-out operation, zoom-in operation, and shutter operation) of the camera application, on the plurality of sensing units SE (seeFIG. 24B). Next, in step S24, the CPU12B displays a camera application screen on the display device13A (seeFIG. 24A).

Next, in step S25, the CPU12B performs operation detection according to the mapping setting in step S23. Specifically, the zoom-out operation detection, the zoom-in operation detection, and the shutter operation detection are performed respectively in the SE (2,2), the SE (2,4), and the SE (2,10), while a malfunction of the zoom-out operation, the zoom-in operation, and the shutter operation is compensated in the sensing unit SE other than the SE (2,2), the SE (2,4), and the SE (2,10).

In a case where it is determined in step S22that the activation operation of the camera application has not been performed, in step S26, the CPU12B determines whether or not an activation operation of the music application has been performed. In a case where it is determined in step S26that the activation operation of the music application has been performed, in step S27, the CPU12B performs mapping setting of each operation (fast-forward playback operation, pause operation, fast-reverse playback operation, volume up operation, and volume down operation) of the music application, on the plurality of sensing units SE (seeFIG. 25B). Next, in step S28, the CPU12B displays a music application screen on the display device13A (seeFIG. 25A).

Next, in step S29, the CPU12B performs operation detection according to the mapping setting in step S27. Specifically, the fast-forward playback operation, the pause operation, the fast-reverse playback operation, the volume up operation, and the volume down operation are respectively detected in the SE (2,1), the SE (2,3), the SE (2,5), the SE (2,9), and the SE (2,11), while a malfunction of the fast-forward playback operation, the pause operation, the fast-reverse playback operation, the volume up operation, and the volume down operation is compensated in the sensing unit SE other than the SE (2,1), the SE (2,3), the SE (2,5), the SE (2,9), and the SE (2,11).

In a case where it is determined in step S26that the activation operation of the music application has not been performed, in step S30, the CPU12B determines whether or not an activation operation of the map application has been performed. In a case where it is determined in step S30that the activation operation of the map application has been performed, in step S31, the CPU12B performs mapping setting for each operation (zoom-out operation, zoom-in operation, up scroll operation, down scroll operation, right scroll operation, and left scroll operation) of the map application, on the plurality of sensing units SE (seeFIG. 26B).

Next, in step S32, the CPU12B displays a map application screen on the display device13A (seeFIG. 26A). Next, in step S33, the CPU12B performs operation detection according to the mapping setting in step S31. Specifically, the zoom-out operation, the zoom-in operation, the up scroll operation, the down scroll operation, the right scroll operation, and the left scroll operation are respectively detected in the SE (2,1), the SE (2,3), the SE (2,7), the SE (2,11), the SE (1,9), and the SE (3,9), while a malfunction of the zoom-out operation, the zoom-in operation, the up scroll operation, the down scroll operation, the right scroll operation, and the left scroll operation is compensated in the sensing unit SE other than the SE (2,1), the SE (2,3), the SE (2,7), the SE (2,11), the SE (1,9), and the SE (3,9).

In a case where it is determined in step S30that the activation operation of the map application has not been performed, in step S34, the CPU12B performs standard mapping setting on the plurality of sensing units SE. Next, in step S35, the CPU12B displays a standard screen on the display device13A. Next, in step S36, the CPU12B performs operation detection according to the mapping setting in step S34.

Here, the standard mapping setting refers to default mapping setting that is set in a case where none of the camera application, the music application, the map application, and the like is not selected. Furthermore, the standard screen refers to a default screen that is set in a case where none of the camera application, music application, map application, and the like is selected.

Effect

In the electronic device110according to the second embodiment, an operation unit corresponding to various applications can be set in the side wall part11R. Therefore, various applications can be operated by pressing the side wall part11R.

[Configuration of Electronic Device]

As shown inFIG. 28, an electronic device210according to a third embodiment is different from the electronic device110according to the first embodiment in that a rectangular film-shaped sensor220curved in a substantially U shape is provided inside a side wall part11R. The curved sensor220may be pressed against inner surfaces of the side wall part11R, a bottom part11M, and a front panel13by a supporting member (not shown), or may be bonded by an adhesive and the like.

FIG. 29Ashows a configuration of the sensor220.FIG. 29Bshows the sensor220in a state of being developed in a flat shape. The sensor220includes sensing units SE1to SE11. The sensor220includes a first region R1disposed on the inner surface of the side wall part11R, a second region R2disposed on the inner surface of the bottom part11M, and a third region R3disposed on the inner surface of the front panel13.

The sensing units SE3, SE6, and SE9are provided in the first region R1, and detect pressing on the side wall part11R. More specifically, the sensing units SE3, SE6, and SE9are provided corresponding to buttons BT1, BT2, and BT3, respectively, and detect pressing of the buttons BT1, BT2, and BT3. The sensing units SE3, SE6, and SE9are arranged with equal intervals in a length direction of the side wall part11R. The sensing units SE3, SE6, and SE9have a rhombus shape, and are arranged such that an extending and contacting direction of one diagonal line of the sensing units SE3, SE6, and SE9each coincides with a length direction of the side wall part11R. Therefore, it is possible to shorten a distance of adjacent sensing unit SE3, SE6, and SE9.

The sensing units SE1, SE4, SE7, and SE10are provided so as to cross a boundary between the first and second regions R1and R2. Since the sensing units SE1, SE4, SE7, and SE10are provided so as to cross the boundary, pressing of a housing11can be detected over a wide range, and pressing of the boundary between the first and second regions R1and R2(that is, a corner portion of the housing11) can be detected. The sensing units SE1, SE4, SE7, and SE10are arranged in a stripe shape with equal intervals perpendicular to the side wall part11R, and one ends of the sensing units SE1, SE4, SE7, and SE10have a V-shape and are extended to the first region R1.

The sensing units SE2, SE5, SE8, and SE11are provided so as to cross a boundary between the first and third regions R1and R3. Since the sensing units SE2, SE5, SE8, and SE11are provided so as to cross the boundary, pressing of the housing11can be detected over a wide range, and pressing of the boundary between the first and third regions R1and R3(that is, a corner portion of the housing11) can be detected. The sensing units SE2, SE5, SE8, and SE11are arranged in a stripe shape with equal intervals perpendicular to the side wall part11R, and one ends of the sensing units SE2, SE5, SE8, and SE11have a V-shape and are extended to the first region R1.

One ends of the sensing units SE1, SE4, SE7, and SE10are provided to face one ends of the sensing units SE2, SE5, SE8, and SE11in the first region R1, respectively. Furthermore, in a region surrounded by one ends of the adjacent sensing units SE1and SE4and one ends of the adjacent sensing units SE2and SE5, a sensing unit SE3is provided. Furthermore, in a region surrounded by one ends of the adjacent sensing units SE4and SE7and one ends of the adjacent sensing units SE5and SE8, a sensing unit SE6is provided. Furthermore, in a region surrounded by one ends of the adjacent sensing units SE7and SE10and one ends of the adjacent sensing units SE8and SE11, a sensing unit SE9is provided.

The sensing units SE3, SE6, and SE9are sensing units for user operation detection for detection of pressing of the buttons BT1, BT2, and BT3, respectively. The sensing units SE1, SE2, SE4, SE5, SE7, SE8, SE10, and SE11each are sensing units for malfunction compensation.

As shown inFIG. 30, the sensor220includes: a sensor electrode layer230of a mutual-capacitance type having the sensing units SE1to SE11; metal layers221and222; an elastic layer223; and an adhesive layer224.

The elastic layer223is provided between main surfaces of the metal layer221and the sensor electrode layer230, and is elastically deformed by pressure applied to a sensing surface220S. The elastic layer223includes a dielectric such as a foamed resin or an insulating elastomer. The foamed resin is a so-called sponge, and is at least one of, for example, foamed polyurethane, foamed polyethylene, foamed polyolefin, or sponge rubber, and the like. The insulating elastomer is, for example, at least one of silicone-based elastomer, acrylic-based elastomer, urethane-based elastomer, or styrene-based elastomer, and the like. Note that the elastic layer223may be provided on a base material (not shown).

FIG. 31Ashows a configuration of the sensor electrode layer230of a mutual-capacitance type. The sensor electrode layer230includes: a base material231; and first and second electrodes232and233provided on one main surface of the base material231. The first and second electrodes232and233form the sensing units SE1to SE11. The first and second electrodes232and233have a comb-teeth shape, and are arranged so as to mesh the comb-teeth portions. Specifically, the first electrode232includes a plurality of sub-electrodes232A having a linear shape. The second electrode233includes a plurality of sub-electrodes233A having a linear shape. The plurality of sub-electrodes232A and233A is extended so as to be parallel to a pair of opposing edges of the sensor220. Note that, as shown inFIG. 31B, the plurality of sub-electrodes232A and233A may be extended so as to be inclined with respect to the pair of opposing edges of the sensor220.

FIG. 32Ashows an example of a pressing position of the sensor220.FIG. 32Bshows detection signals of the sensing units SE1to SE11when a position PA shown inFIG. 32Ais pressed.FIG. 32Cshows detection signals of the sensing units SE1to SE11when a position PB shown inFIG. 32Ais pressed. In a case where the position PA shown inFIG. 32Ais pressed, the detection signals of the sensing units SE2, SE3, SE5, SE8, and SE11become high. In a case where the position PB shown inFIG. 32Ais pressed, the detection signals of the sensing units SE5, SE8, SE9, SE10, and SE11become high. Note that polarity of a detection signal of the sensing unit SE10is opposite to that of the sensing units SE5, SE8, SE9, SE10, and SE11.

The metal layers221and222and the adhesive layer224are similar to the metal layers21and22and the adhesive layer24in the first embodiment, respectively, except for the shape.

[Operation of Electronic Device]

First, in step S41, an IC12A sequentially scans the sensing units SE1to SE11, acquires the respective detection signals S1to S11of the sensing units SE1to SE11, and supplies to the CPU12B. Next, in step S42, the CPU12B determines whether or not at least one of the detection signals S3, S6, and S9supplied from the IC12A exceeds a threshold A. In a case where it is determined in step S42that none of at least one of the detection signals S3, S6, and S9exceeds the threshold A, the CPU12B returns the process to step S41. In a case where it is determined in step S42that at least one of the detection signals S3, S6, and S9exceeds the threshold A, in step S43, the CPU12B determines whether or not at least one of the detection signals S1, S2, S4, S5, S7, S8, S10, and S11other than the detection signals S3, S6, and S9exceeds a threshold B.

In a case where it is determined in step S43that at least one of the detection signals S1, S2, S4, S5, S7, S8, S10, and S11exceeds the threshold B, in step S44, the CPU12B determines that bending or twisting has been applied to the electronic device10. Then, in step S45, the CPU12B displays a screen (seeFIG. 13A) that warns a user that bending or twisting has been applied to the electronic device10, and returns the process to step S41. In a case where it is determined in step S43that none of at least one of the detection signals S1, S2, S4, S5, S7, S8, S10, and S11exceeds the threshold B, in step S46, the CPU12B determines whether or not at least one of the detection signals S1, S2, S4, S5, S7, S8, S10, and S11exceeds a threshold -C.

In a case where it is determined in step S46that at least one of the detection signals S1, S2, S4, S5, S7, S8, S10, and S11exceeds the threshold -C, the CPU12B executes the processes of steps S44and45and then returns the process to step S41. In a case where it is determined in step S46that none of at least one of the detection signals S1, S2, S4, S5, S7, S8, S10, and S11exceeds the threshold -C, the CPU12B executes processing corresponding to a sensing unit SE in which a signal having the highest signal level among the detection signals S3, S6, and S9is detected, and returns the process to step S41.

Effect

The electronic device210according to the third embodiment includes: the sensing unit SE for user operation detection arranged on an inner surface11SB of the side wall part11R; the sensing unit SE for malfunction compensation arranged on the inner surface of the bottom part11M; and the sensing unit SE for malfunction compensation arranged on the inner surface of the front panel13. Therefore, a malfunction of the electronic device210can be suppressed.

MODIFIED EXAMPLE

Modified Example 1

In the third embodiment described above, a case has been described where the sensor220is the mutual-capacitance type, but the sensor220may be a self-capacitance type.

FIG. 34is a plan view showing a configuration of a sensor electrode layer230A of a self-capacitance type. The sensor electrode layer230A includes a base material231and a plurality of electrodes234and235provided on one main surface of the base material231. The individual electrodes234and235form sensing units SE1to SE11. The sensing units SE1to SE11are all thin film electrodes. The sensing units SE3, SE6, and SE9are configured by the electrode234having a rhombus thin film shape. However, the shape of the electrode234is not limited to a rhombus shape, and may be a circular shape, an elliptical shape, a polygonal shape other than a rhombus shape, an irregular shape, and the like. The sensing units SE1, SE2, SE4, SE5, SE7, SE8, SE10, and SE11are configured by the electrode235having a pentagonal thin film shape in which one short edge of a rectangular shape is pointed in a V shape. However, the electrode235is not limited to the shape described above, and may be an oblong shape, a polygonal shape other than a pentagonal shape (for example, a rectangular shape), an irregular shape, and the like.

Wiring234A is drawn from the sensing units SE3, SE6, and SE9and is electrically connected to a connector42. Furthermore, wiring235A is drawn out from the sensing units SE1, SE2, SE4, SE5, SE7, SE8, SE10, and SE11, and is electrically connected to the connector42.

Modified Example 2

Instead of the elastic layer223, the sensor220may include a plurality of supports having a columnar shape. The support is provided between adjacent sensing units SE, for example.

Modified Example 3

The sensor220may be curved in a substantially L shape. In this case, the sensor220has the first region R1, and one of the second region R2and the third region R3.

[Configuration of Electronic Device]

FIG. 35Ashows an internal configuration of an electronic device310according to a fourth embodiment of the present disclosure. The electronic device310is a so-called smartphone, and includes a housing311, a sensor module320, a board312, and the like. Note that, in the fourth embodiment, same reference numerals are assigned to points similar to those in the first embodiment, and descriptions thereof are omitted as appropriate.

The housing311includes side wall parts311L and311R, and one side wall part311L is provided with an elongated slit part311A. The slit part311A is provided such that a width direction (short direction) of the slit part311A is to be a height direction of the side wall part311L, and a longitudinal direction of the slit part311A is to be a length direction of the side wall part311L.

Three buttons (not shown) are provided on an outer surface311SA of the side wall part311L so as to be aligned in one line in a length direction of the side wall part311L. These three buttons correspond to the buttons BT1, BT2, and BT3(seeFIG. 1) in the first embodiment. On an upper part of the side wall part311L, a sloped area311AR is provided to be adjacent to the slit part311A, and a waterproof tape (not shown) is provided in this area311AR.

FIG. 36is a perspective view showing an appearance of the sensor module320. The sensor module320includes an elongated sensor unit321and a connecting part41extended from one long edge part of the sensor unit321. A connector (not shown) included in the connecting part41is connected to a connector (not shown) provided on the board312.

The sensor unit321includes a sensor20, an elastic body51provided on a back surface of the sensor20, and a holder321A configured to support the elastic body51. The sensor20and the elastic body51are bonded together by an adhesive layer (not shown), and the elastic body51and the holder321A are bonded together by an adhesive layer (not shown). As described in the first embodiment, the sensor20and the connecting part41are integrally configured by one FPC40having a T shape.

The sensor unit321has a sensing surface (first surface)321S1configured to detect pressing, and a back surface (second surface)321S2on a side opposite to the sensing surface (first surface)321S1. The sensor unit321is press-fitted into the slit part311A such that the sensing surface321S1faces a direction of the outer surface311SA of the side wall part311L. The slit part311A is an example of an accommodation part to accommodate the sensor unit321in the side wall part311L.

The elastic body51is configured to be elastically deformable by pressing the sensor unit321in a thickness direction, and is compressed when the sensor unit321is press-fitted into the slit part311A.

The holder321A is for supporting the elastic body51on the back surface321S2side and increasing rigidity of the back surface321S2. Since the sensor unit321includes the holder321A having such a function, the sensor unit321can be easily press-fitted into the slit part311A. The holder321A has a long rectangular shape, and includes a main surface part321A1to which the elastic body51is bonded, and a wall part321A2provided on each edge of the main surface part321A1so as to surround the elastic body51.

As a material of the holder321A, for example, a light and highly rigid material, such as metal, polymer resin, ceramic, or wood can be used. Note that two or more of these materials may be layered and used. As the metal, a material similar to that of the metal layers21and22can be exemplified. However, metal having low conductivity other than those exemplified as the material of the metal layers21and22may be used. As the polymer resin, a material similar to that of the base material31can be exemplified. As the ceramic, for example, porous alumina ceramic, or zirconia, and the like can be used.

The board312includes an IC (not shown) configured to control the sensor20and detect pressure applied to the sensing surface20S of the sensor20. The board312is connected to a main board (not shown) including a CPU configured to control the entire electronic device310. The IC and the CPU are similar to the IC12A and the CPU12B in the first embodiment, respectively.

Effect

In the electronic device310according to the fourth embodiment, a malfunction can be suppressed similarly to the first embodiment.

Furthermore, the sensor unit321includes the sensor20, the elastic body51provided on the back surface side of the sensor20, and the holder321A configured to support the elastic body51. Therefore, the sensor unit321of the sensor module320can be press-fitted into the slit part311A. Therefore, dimensional tolerances of the slit part311A and the sensor unit321can be absorbed.

Furthermore, the sensor module320can be attached to the side wall part311L by simply press-fitting the sensor unit321of the sensor module320into the slit part311A. Therefore, it is easy to attach the sensor module320, and productivity can be improved.

[Configuration of Electronic Device]

FIG. 37shows an internal configuration of an electronic device410according to a fifth embodiment of the present disclosure. The electronic device410includes a housing411, a sensor module420, a reinforcing material (brace)430, and the like. Note that, in the fifth embodiment, same reference numerals are assigned to points similar to those in the first embodiment, and descriptions thereof are omitted as appropriate.

The housing411has a side wall part411L. Inside the side wall part411L, a long groove part412extended along the side wall part411L is provided. An aperture413A and a protrusion414A are provided outside one end of the groove part412, and an aperture413B and a protrusion414B are provided outside the other end.

Three buttons (not shown) are provided on an outer surface411SA of the side wall part411L so as to be aligned in one line in a length direction of the side wall part411L. These three buttons correspond to the buttons BT1, BT2, and BT3(seeFIG. 1) in the first embodiment.

The sensor module420includes an elongated sensor unit421and a connecting part41extended from one long edge part of the sensor unit421. A connector (not shown) included in the connecting part41is connected to a connector provided on a board (not shown).

FIG. 38shows a configuration in the vicinity of the side wall part411L. The sensor unit421includes a sensor20, an elastic body (cushion layer)51provided on a back surface of the sensor20, and a support (backer)421A configured to support the elastic body51. The sensor20and the elastic body51are bonded together by an adhesive layer (not shown), and the elastic body51and the support421A are bonded together by an adhesive layer (not shown).

The sensor unit421has a sensing surface (first surface)421S1configured to detect pressing, and a back surface (second surface)421S2on a side opposite to the sensing surface (first surface)421S1. The sensor unit421is fitted into the groove part412such that the sensing surface421S1faces an inner surface411SB of the side wall part411L.

The support421A is for supporting the elastic body51on the back surface421S2side and increasing rigidity of the back surface421S2. Since the sensor unit421includes the support421A having such a function, the sensor unit421can be fitted into the groove part412.

On a surface forming the back surface421S2of the support421A, a plurality of protrusions421B is provided. These protrusions421B are pushed inside a side wall of the groove part412. Therefore, a state can be made where the sensing surface421S1is pressed against the inner surface411SB of the side wall part411L. As a material of the support421A, a material similar to that of the holder321A can be exemplified.

The reinforcing material430covers an upper part and a back surface of the sensor unit421fitted into the groove part412. Since the reinforcing material430covers the sensor unit421in this manner, it is possible to prevent that other constituent members accommodated in the electronic device410come into contact with the sensor unit421to cause a malfunction of the sensor unit421. The reinforcing material430has an elongated shape, and both ends of the reinforcing material430are fixed by screws433A and433B and the protrusions414A and414B. Specifically, through holes431A and431B and through holes432A and432B are provided at both ends of the reinforcing material430in a longitudinal direction. The screws433A and433B are respectively inserted into the through holes431A and431B, and screwed into the apertures413A and413B. Furthermore, the protrusions414A and414B are inserted into the through holes432A and432B, respectively. The protrusions414A and414B and the through holes432A and432B also have a function as a member that guides the reinforcing material430to a prescribed position on the sensor unit421when the sensor module420is attached.

An upper boundary between the reinforcing material430and the side wall part411L is a flush slope, and a waterproof tape (not shown) is provided in an area411AR including the boundary.

Hereinafter, a method for attaching the sensor module420will be described with reference toFIGS. 39A, 39B, 40A, and 40B.

First, as shown inFIGS. 39A and 39B, by pushing the plurality of protrusions421B inside the side wall of the groove part412while pressing the sensing surface421S1of the sensor unit421against the inner surface411SB of the side wall part411L, and pressing the sensor unit421from the back surface421S2side to compress the elastic body51, the sensor unit421is fitted into the groove part412.

Next, as shown inFIGS. 40A and 40B, the through holes432A and432B of the reinforcing material430are respectively inserted into the protrusions414A and414B, and the reinforcing material430is arranged at a predetermined position on the sensor unit421. Thereafter, the screws433A and433B are inserted into the through holes431A and431B of the reinforcing material430, and screwed into the apertures413A and413B. Therefore, the reinforcing material430is fixed at a prescribed position on the sensor unit421.

Effect

In the electronic device410according to the fifth embodiment, a malfunction can be suppressed similarly to the first embodiment.

Furthermore, the sensor unit421includes the sensor20, the elastic body51provided on the back surface side of the sensor20, and the support421A configured to support the elastic body51. Therefore, the elastic body51can be compressed, and the sensor unit421can be fitted into the groove part412. Therefore, dimensional tolerances of the groove part412and the sensor unit421can be absorbed.

Furthermore, by fitting the sensor unit421of the sensor module420into the groove part412, the sensor module420can be attached to a prescribed position inside the side wall part411L. Therefore, it is easy to attach the sensor module420, and productivity can be improved.

[Configuration of Electronic Device]

FIG. 41Ashows a configuration of an electronic device510according to a sixth embodiment of the present disclosure.FIG. 41Bshows a state where a sensor520shown inFIG. 41Ais developed. The electronic device510includes the sensor520with an FPC521as a base. Specifically, the sensor520includes the FPC521, a plurality of supports522, and a plurality of supports23. Note that, in the sixth embodiment, same reference numerals are assigned to points similar to those in the first embodiment, and descriptions thereof are omitted as appropriate.

FIG. 42shows a configuration of the FPC521. The FPC521includes an elongated sensor unit521A, and a connecting part521B extended from one long edge of the sensor unit521A. At a tip end of the connecting part521B, a connector521C for connection of the sensor520to the board is provided. In the sensor unit521A of the FPC521, a reference electrode area (hereinafter referred to as “REF area”)521A1, a folding area521A2, a REF area521A3, a folding area521A4, and a sensor electrode area521A5are provided in this order from one end to the other end in a longitudinal direction.

The sensor unit521A of the FPC521is folded such that the REF area521A1and the sensor electrode area521A5face each other, and the REF area521A3and the sensor electrode area521A5face each other. Between the REF area521A1and the sensor electrode area521A5, a plurality of supports522is provided, while between the REF area521A3and the sensor electrode area521A5C, a plurality of supports23is provided.

The folding area521A2is an area for the FPC521to be folded between the REF area521A1and the REF area521A3. The folding area521A4is an area for the FPC521to be folded between the REF area521A3and the sensor electrode area521A5.

The REF area521A1is an area corresponding to the metal layer (reference electrode layer)22in the first embodiment, and includes a metal layer22. The REF area521A3is an area corresponding to the metal layer (reference electrode layer)21in the first embodiment, and includes a metal layer21. The sensor electrode area521A5is an area corresponding to the sensor electrode layer30in the first embodiment, and includes sensing units SE1to SE7.

The support522supports the sensor electrode area521A5on the REF area521A1, and separates the REF area521A1from the sensor electrode area521A5. The support23supports the REF area521A3on the sensor electrode area521A5, and separates the sensor electrode area521A5from the REF area521A3.

The plurality of supports522is arranged in one line with a predetermined interval in a longitudinal direction of the sensor520, and a space is provided between adjacent supports522. A sensing unit SE is provided in this space. The plurality of supports23is arranged in one line with a predetermined interval in the longitudinal direction of the sensor520, and a space is provided between adjacent supports522. A sensing unit SE is provided under this space.

As a material of the support522, a material similar to that of the support23can be exemplified.

The sensing units SE1to SE7are connected to a signal terminal of the connector521C via wiring (not shown) provided on the FPC521. Furthermore, the metal layers21and22are connected to a ground (GND) terminal of the connector521C via wiring (not shown) provided on the FPC521.

Effect

In the sensor520according to the sixth embodiment, one corresponding to the metal layer21, the metal layer22, and the sensor electrode layer30in the first embodiment can be configured by one FPC521. Therefore, the number of parts can be reduced as compared with the sensor20according to the first embodiment.

The metal layers21and22are connected to the ground (GND) terminal of the connector521C via the wiring provided on the FPC521. Therefore, unlike the sensor20in the first embodiment, it is not necessary to separately provide a conductive member such as the ACF, so that the configuration of the sensor520can be simplified.

MODIFIED EXAMPLE

Modified Example 1

In the sixth embodiment, a description has been given to a configuration in which the REF area521A1, the REF area521A3, and the sensor electrode area521A5are provided in one FPC, but the configuration of the sensor520is not limited to this. For example, a configuration may be adopted in which the REF area521A1, the REF area521A3, and the sensor electrode area521A5may be individually provided in different FPCs. Hereinafter, a sensor having such a configuration will be described.

FIG. 43shows a configuration of a sensor550according to a modified example. The sensor550includes: an elongated FPC551including a metal layer21; a support layer552provided on the FPC551; an elongated FPC553provided on the support layer552and including sensing units SE1to SE7; a support layer554provided on the FPC553; and an elongated FPC555provided on the support layer554and including a metal layer22.

The support layer552supports the FPC553on the FPC551and separates the FPC551from the FPC553. The support layer552has a space between the sensing unit SE included in the FPC553and the FPC551. More specifically, the support layer552includes a plurality of supports552A. The plurality of supports552A is similar to the supports25in Modified Example 1 of the first embodiment.

The support layer554supports the FPC555on the FPC553and separates the FPC553from the FPC555. The support layer554has a space between the sensing unit SE included in the FPC553and the FPC555. More specifically, the support layer554includes a plurality of supports554A. The plurality of supports554A is similar to the supports23of the first embodiment.

A ground pad553A is provided at one end of the FPC553. The ground pad553A and one end of the FPC551are connected by an adhesive, and the ground pad553A and one end of the FPC555are connected by an adhesive. Furthermore, the ground pad553A, the one end of the FPC551, and the one end of the FPC555are electrically connected by connection means such as a through hole, a VIA, or a blind via hole (BVH). Therefore, the metal layers21and22are grounded.

Modified Example 2

In the sixth embodiment, the sensor520may include an elastic layer instead of the plurality of supports522, or may include an elastic layer instead of the plurality of supports23. Furthermore, in Modified Example 1 of the sixth embodiment, the sensor550may include an elastic layer instead of at least one of the support layers552and554. Note that, as a material of the elastic layer, a material similar to that of the elastic layer in Modified Example 1 of the first embodiment can be exemplified.

[Configuration of Electronic Device]

FIG. 44is a cross-sectional view showing a configuration of an electronic device610according to a seventh embodiment of the present disclosure. The electronic device610includes an elongated sensor610A including: a first sensor structure620; and a second sensor structure630provided on the first sensor structure620.

The first sensor structure620includes: a metal layer (first reference electrode layer)621; a support layer (first support layer)622provided on the metal layer621; a sensor electrode layer (first sensor electrode layer)623provided on the support layer622; a support layer (second support layer)624provided on the sensor electrode layer623; and a metal layer (second reference electrode layer)625provided on the support layer624.

Furthermore, the first sensor structure620includes: a conductive member622B such as an ACF that connects a ground pad623A included in the sensor electrode layer623at one end to the metal layer621; and a conductive member624B such as an ACF that connects the ground pad623A to the metal layer625. The metal layer621is grounded through the conductive member622B and the ground pad623A, and is set to a ground potential. Furthermore, the metal layer625is grounded through the conductive member624B and the ground pad623A, and is set to a ground potential.

(Second Sensor Structure) The second sensor structure630includes: a support layer (third support layer)631provided on the metal layer (second reference electrode layer)625; a sensor electrode layer (second sensor electrode layer)632provided on the support layer631; a support layer (fourth support layer)633provided on the sensor electrode layer632, and a metal layer (third reference electrode layer)634provided on the support layer633.

Furthermore, the second sensor structure630includes a conductive member631B such as an ACF that connects a ground pad632A included in the sensor electrode layer632at one end to the metal layer625, and a conductive member633B such as an ACF that connects the ground pad632A to the metal layer634. The metal layer625is grounded through the conductive member631B and the ground pad632A, and is set to the ground potential. Furthermore, the metal layer634is grounded through the conductive member633B and the ground pad632A, and is set to a ground potential.

The support layer622supports the sensor electrode layer623on the metal layer621, and separates the metal layer621from the sensor electrode layer623. The support layer622has a space between the sensing unit SE included in the sensor electrode layer623and the metal layer621. More specifically, the support layer622includes a plurality of supports622A. The plurality of supports622A is similar to the supports25in Modified Example 1 of the first embodiment.

The support layer624supports the metal layer625on the sensor electrode layer623, and separates the sensor electrode layer623from the metal layer625. The support layer624has a space between the sensing unit SE included in the sensor electrode layer623and the metal layer625. More specifically, the support layer624includes a plurality of supports624A. The plurality of supports624A is similar to the supports23of the first embodiment.

The support layer631supports the sensor electrode layer632on the metal layer625, and separates the metal layer625from the sensor electrode layer632. The support layer631has a space between the sensing unit SE included in the sensor electrode layer632and the metal layer625. More specifically, the support layer631includes a plurality of supports631A. The plurality of supports631A is similar to the supports25in Modified Example 1 of the first embodiment.

The support layer633supports the metal layer634on the sensor electrode layer632, and separates the sensor electrode layer632from the metal layer634. The support layer633has a space between the sensing unit SE included in the sensor electrode layer632and the metal layer634. More specifically, the support layer633includes a plurality of supports633A. The plurality of supports633A is similar to the supports23of the first embodiment.

The sensor electrode layers623and632are similar to the sensor electrode layer30in the first embodiment. That is, the sensor electrode layers623and632are configured by an FPC.

The metal layers621,625, and634are similar to the metal layers21and22in the first embodiment.

The electronic device610includes an IC and a CPU (both not shown). The IC detects a change (pressure) in electrostatic capacity of each sensing unit SE included in the sensor610A, that is, each sensing unit SE included in the sensor electrode layers623and632, and outputs a signal according to a result thereof to the CPU. Note that the IC may add changes in electrostatic capacity of a pair of sensing units SE that are stacked in a thickness direction of the sensor610A, and output a signal according to the added value.

Effect

The electronic device610according to the seventh embodiment includes: the sensor610A including the first sensor structure620; and the second sensor structure630provided on the first sensor structure620. Therefore, it is possible to detect pressing of the buttons BT1, BT2, and BT3, by the sensing units SE of the two sensor electrode layers623and632. Therefore, the detection sensitivity of the buttons BT1, BT2, and BT3can be improved.

MODIFIED EXAMPLE

Modified Example 1

FIG. 45is a cross-sectional view showing a configuration of a sensor650according to a modified example. In the sensor650, a first sensor structure660includes elongated FPCs661and662instead of the elongated metal layers621,625, and634. Furthermore, a second structure670includes an elongated FPC671instead of the elongated metal layer634. The FPCs661,662, and671include metal layers621,625, and634, respectively.

One end of the FPC661, a ground pad623A of a sensor electrode layer623, one end of the FPC662, a ground pad632A of a sensor electrode layer632, and one end of the FPC671are connected by adhesives622C,624C,631C, and633C, and are electrically connected by connection means681such as a through hole, a VIA, or a blind via hole (BVH). Therefore, the metal layers621,625, and634are grounded.

Furthermore, the sensing units SE of the sensor electrode layers623and632that are stacked in a thickness direction of the sensor650are electrically connected by connection means682such as a through hole, a VIA, or a blind via hole (BVH).

Modified Example 2

In the seventh embodiment, the sensor610A may include an elastic layer instead of at least one of the support layers622,624,631, and633. Furthermore, in Modified Example 1 of the seventh embodiment, the sensor650may include an elastic layer instead of at least one of the support layers622,624,631, and633. Note that, as a material of the elastic layer, a material similar to that of the elastic layer in Modified Example 1 of the first embodiment can be exemplified.

REFERENCE EXAMPLE

Hereinafter, the present disclosure will be specifically described with reference examples, but the present disclosure is not limited to these reference examples only.

Reference Example 1

By laminating each member shown below, a rectangular film sensor610A having the configuration shown inFIG. 44was produced.

Reference Example 2

A rectangular film-shaped sensor including only the first sensor structure620of Reference Example 1 was produced.

Using a Φ6 mm silicone rubber keying element, the sensing unit SE was pressed, and a capacity change amount with respect to a displacement amount of the sensing surface20S was measured. The results are shown inFIGS. 46A and 46B.

From the results described above, when a displacement amount range where the capacity change (capacity decrease) was −0.005 [pF] or less was determined, the displacement amount range was about 380 μm (seeFIG. 46A) in the sensor610A of Reference Example 1, while the displacement amount range was about 170 μm (seeFIG. 46B) in the sensor of Reference Example 2. That is, a range that can be detected as the displacement amount by the sensor610A of Reference Example 1 was more than twice a range that can be detected as the displacement amount by the sensor of Reference Example 2. Note that, it is usually considered that good sensitivity can be obtained if the capacity change (capacity decrease) is 0.005 [pF] or less.

The embodiments and the modified examples thereof of the present disclosure have been specifically described above, but the present disclosure is not limited to the above-described embodiments and modified examples thereof, and various modifications based on the technical idea of the present disclosure are possible.

For example, configurations, methods, processes, shapes, materials, numerical values, and the like described in the above-described embodiments and modified examples are merely examples, and different configurations, methods, processes, shapes, materials, numerical values, and the like may be used as necessary.

Furthermore, configurations, methods, processes, shapes, materials, numerical values, and the like of the above-described embodiments and modified examples thereof can be combined with each other without departing from the gist of the present disclosure.

In the electronic device310according to the fourth embodiment, the electronic device410according to the fifth embodiment, the electronic device510according to the sixth embodiment, and the electronic device610according to the seventh embodiment, the configuration (configuration in the second embodiment) may be adopted in which the information13G corresponding to the buttons BT1, BT2, and BT3is displayed at a position along an edge on the side wall part side in the screen13B, instead of the configuration with the buttons BT1, BT2, and BT3being provided on the side wall part.

In the first to seventh embodiments, a case where the sensing units SE1, SE3, SE5, and SE7are used as the sensing units for malfunction compensation has been described, but all the sensing units SE1to SE7may be used as the sensing units for user operation detection. In this case, buttons are also provided at positions corresponding to the sensing units SE1, SE3, SE5, and SE7.

Furthermore, the present disclosure can also adopt the following configurations.

An electronic device including:

a housing;

a sensor provided on an inner surface of the housing and configured to detect deformation of the housing; and

a control unit configured to control an operation of the electronic device on the basis of a detection result of the sensor, in which

the sensor includes

a first sensing unit configured to detect a prescribed user operation, and

a second sensing unit configured to compensate for a malfunction.

The electronic device according to (1), in which

the sensor includes two or more of the first sensing unit, and

the second sensing unit is provided between the first sensing units that are adjacent.

The electronic device according to (1) or (2), in which the control unit detects a malfunction on the basis of whether or not a level of at least one signal among detection signals of the first sensing unit and the second sensing unit exceeds a threshold, and a signal having a highest signal level among at least one signal exceeding the threshold is a detection signal of the first sensing unit.

The electronic device according to any one of (1) to (3), in which the control unit detects a malfunction on the basis of whether or not a level of at least one signal among detection signals of the first sensing unit and the second sensing unit exceeds a second threshold that is opposite in polarity to a first threshold that is for determining the prescribed user operation.

The electronic device according any one of (1) to (4), in which, as an application is activated, the control unit allocates some of a plurality of sensing units to the first sensing unit and allocates the rest to the second sensing unit.

The electronic device according to (5), further including

a display device, in which

the control unit displays information regarding an operation corresponding to the first sensing unit at a position corresponding to the first sensing unit in a screen of the display device.

the housing includes a bottom part, a wall part provided at a peripheral edge of the bottom part, and a front panel provided on the wall part,

the first sensing unit is provided on an inner surface of the wall part, and

the second sensing unit is provided on at least one inner surface of the bottom part or of the front panel.

The electronic device according to (7), in which the control unit detects a malfunction on the basis of whether or not a detection signal of the second sensing unit exceeds a threshold.

The electronic device according to any one of (1) to (8), in which

the housing has a side wall part, and

the sensor is provided on an inner surface of the side wall part.

The electronic device according to (9), further including:

an elastic body provided on a back surface of the sensor; and

a support configured to support the elastic body, in which

the housing has a groove part provided along the side wall part,

a sensor module is configured by the sensor, the elastic body, and the support, and

the sensor module is fitted into the groove part.

The electronic device according to any one of (1) to (9), further including:

an elastic body provided on a back surface of the sensor; and

a support configured to support the elastic body.

The electronic device according to any one of (1) to (8), in which

the housing has a side wall part having a slit part, and

the sensor is accommodated in the slit part.

The electronic device according to any one of (1) to (11), in which the sensor has a film shape, and is provided such that one main surface of the sensor faces an inner surface of the housing.

the sensor includes

a first reference electrode layer,

a first support layer provided on the first reference electrode layer,

a first sensor electrode layer provided on the first support layer,

a second support layer provided on the first sensor electrode layer, and

a second reference electrode layer provided on the second support layer.

The electronic device according to (14), in which

the sensor further includes

a third support layer provided on the second reference electrode layer,

a second sensor electrode layer provided on the third support layer,

a fourth support layer provided on the second sensor electrode layer, and

a third reference electrode layer provided on the fourth support layer.

The electronic device according to (14), in which the first reference electrode layer, the second reference electrode layer, and the first sensor electrode layer are configured by one flexible board.

An electronic device including:

a housing;

a sensor provided in the housing and configured to detect deformation of the housing; and

a control unit configured to control an operation of the electronic device on the basis of a detection result of the sensor, in which

the sensor includes

a first sensing unit configured to detect a prescribed user operation, and

a second sensing unit configured to compensate for a malfunction.

A sensor provided on an inner surface of a housing and configured to detect deformation of the housing, the sensor including:

a first sensing unit configured to detect a prescribed user operation; and

a second sensing unit configured to compensate for a malfunction.

A sensor provided in a housing and configured to detect deformation of the housing, the sensor including:

a first sensing unit configured to detect a prescribed user operation; and

a second sensing unit configured to compensate for a malfunction.

REFERENCE SIGNS LIST