JP6478655B2 - Mobile device - Google Patents

Description

  The present disclosure relates to a mobile terminal, and more particularly, to a technique for preventing a malfunction of a mobile terminal including an operation key on the same surface as a display.

  In recent years, portable terminals equipped with a display have been widely used. For example, there are smartphones, tablets, laptop PCs (Personal Computers), and the like as portable terminals, and these portable terminals are being used in various situations as the weight of these portable terminals progresses. In some laptop PCs, the display and the keyboard are separable, and there are some that can be used as a tablet by separating them. In recent years, the display size of smartphones has increased, and smartphones having a display of 4 inches to 6 inches are also used. Along with the increase in the size of smartphone displays, so-called “Phablet” terminals have also emerged as terminals that have both smartphone and tablet functions. In recent years, for example, a watch-type wearable device has also appeared.

  Some of such portable terminals include an operation key for accepting a user's physical input operation. Various techniques have been studied in order to prevent such an operation key from being accidentally pressed and an operation unintended by the user. For example, Japanese Patent Laid-Open No. 2002-199443 (Patent Document 1) discloses a non-foldable mobile phone in which a tilt detection unit is installed in a main body, and when it is detected that the tilt with respect to a horizontal plane is smaller than a reference angle, Describes a technique for invalidating external input operations.

JP 2002-199443 A

  According to the technique described in Patent Document 1, according to the inclination of the terminal, the operation of the input unit is invalidated when the inclination of the terminal with respect to the horizontal plane is smaller than the reference angle. In addition, when the terminal receives an incoming call, the terminal input can be detected to enable key input. Thereby, in the technique described in Patent Document 1, it is possible to prevent malfunctions with respect to unintended key inputs and to reduce the number of key inputs when responding to an incoming call, without making the user particularly aware.

  However, in recent years, mobile terminals such as smartphones, tablets, and fablets can execute many applications in addition to the call function. For example, a mobile terminal connects to an application distribution platform such as a Web store and installs and executes an application, thereby allowing a browser, SNS (Social Network Service), messaging, game, calendar, camera, album, photo processing, Various functions such as news, electronic book browsing, and recipe search can be performed. For this reason, the user can use the mobile device in a horizontally long state, not only a phone call, put a mobile device on a desk, look at the display with multiple people, operate the mobile device while lying on a bed or sofa, etc. Opportunities to use mobile devices in various ways are increasing. Since the technique described in Patent Document 1 determines whether or not a malfunction occurs based only on the tilt of the terminal, according to the technique of Patent Document 1, a malfunction that a user does not intend can be detected for a recent mobile terminal. It has become difficult.

  An object of the present disclosure is to provide a technique for preventing a malfunction that is not intended by a user.

  A mobile terminal according to an embodiment has a display, a first sensor for detecting that a user is holding the casing of the mobile terminal, and a second sensor for detecting the tilt of the mobile terminal And an operation key installed on the same surface as the display of the housing, and a control unit for controlling the operation of the mobile terminal. The control unit is configured to detect that the operation key is pressed, and based on the output values of the first sensor and the second sensor, the mobile terminal is not gripped by the user, and the mobile terminal And a key operation lock switching unit that invalidates the input operation by the operation key when it is detected that the display surface of the casing is directed in the direction of gravity.

  The mobile terminal according to the embodiment can detect a state where the display screen is placed on a desk or the like with the display screen facing downward based on the output of each sensor, and is in the same plane as the display in a state where the user does not intend to perform an operation. Even if the key is pressed, malfunction can be prevented.

  The above and other objects, features, aspects and advantages of the present invention will become apparent from the following detailed description of the present invention taken in conjunction with the accompanying drawings.

It is a figure which shows schematically the external appearance and structure of the portable terminal 10 of Embodiment 1. FIG. It is a figure which shows the relationship between the output value which the acceleration sensor 132 outputs, and the direction where the display surface of the housing | casing of the portable terminal 10 is facing, and a mode that the user is holding the portable terminal. 10 is a flowchart showing processing for invalidating an input operation by a physical operation key 131 based on an output value of a grip sensor 134 and an output value of an acceleration sensor 132 by the mobile terminal 10. 10 is a flowchart showing processing for switching whether the mobile terminal 10 of the second embodiment sets a hands-free call or a normal call when an incoming call is received. 7 is a flowchart showing processing for switching to a normal call when the mobile terminal 10 of the second embodiment has a display surface of the mobile terminal 10 facing down (downside down) and performing a hands-free call. The mobile terminal 10 according to the second embodiment makes a hands-free call by detecting that the display surface of the mobile terminal 10 is face down (side down) and the user is not holding the mobile terminal 10 in a normal call state. It is a flowchart which shows the process which transfers. The portable terminal 10 according to the third embodiment performs processing for controlling whether to enable or disable the input operation using the physical operation key 131 based on the output values of the grip sensor 134, the physical operation key 131, and the proximity sensor 135. It is a flowchart to show.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. In the following description, the same parts are denoted by the same reference numerals. Their names and functions are also the same. Therefore, detailed description thereof will not be repeated.

<Embodiment 1>
FIG. 1 is a diagram schematically illustrating an appearance and a configuration of a mobile terminal 10 according to the first embodiment. FIG. 1A shows an appearance of the mobile terminal 10 and shows a surface on which the display 142 of the casing of the mobile terminal 10 is arranged. FIG. 1B is a diagram illustrating the back surface of the casing of the mobile terminal 10 (the side opposite to the surface on which the display 142 is disposed). FIG. 1C is a block diagram illustrating a configuration of the mobile terminal 10. The mobile terminal 10 is, for example, a smartphone, a tablet, or other mobile terminal.

  As shown in FIG. 1A, the mobile terminal 10 includes a physical operation key 131 and a proximity sensor 135 on the same surface as the surface (referred to as a front surface) on which the display 142 of the housing is disposed. The mobile terminal 10 includes a touch panel 141 and a display 142 on the front. Although the display 142, the touch panel 141, and the cover glass are laminated and fitted in the housing of the mobile terminal 10, the present invention is not limited thereto, and a display with a built-in touch panel function may be used. A cover glass integrated with the cover glass (cover glass integrated touch panel) may be used. The touch panel 141 detects contact of a user's finger or stylus pen. The display 142 displays a virtual keyboard for inputting characters, an icon, a still image, a moving image, and an image based on a signal for drawing.

  As shown in FIG. 1A, the speaker 148 arranged in front of the housing outputs a call voice when the mobile terminal 10 makes a normal call, for example. As shown in FIG. 1B, the speaker 148 disposed on the back surface of the housing outputs a call voice when the mobile terminal 10 makes a hands-free call, for example. The normal call means that the user makes a call while holding the mobile terminal 10, and the mobile terminal 10 has a speaker 148 (positioned on the front surface) disposed mainly on the surface on which the display 142 of the mobile terminal 10 is disposed. The call voice is output from the speaker 148). The hands-free call is a state in which a user can place a call on the mobile terminal 10 on a desk and release the hand from the mobile terminal 10, and the mobile terminal 10 is mainly arranged on the back side. The call voice is output from the speaker 148. However, the present invention is not limited to this, and the voice may be output from the speaker 148 disposed in front at a louder volume than that during the normal call.

  The physical operation key 131 is a physical input member, detects an operation of the user pressing the input member, and accepts it as an input operation. The mobile terminal 10 includes a grip sensor 134 that detects contact of the human body with the housing on the side surface of the housing. In the example of FIGS. 1A and 1B, grip sensors 134 are disposed on both side surfaces of the casing of the mobile terminal 10. The grip sensor 134 is, for example, a capacitive touch sensor, a sensor that detects a change in pressure, a sensor that detects a change in temperature, and the like, and detects a change in electrical resistance or a change in temperature. The contact of the human body with the grip sensor 134 is detected. The proximity sensor 135 is a sensor for detecting that the detection target is approaching without contacting the detection target (for example, a human body). The proximity sensor 135 measures the capacitance change between the electrodes using, for example, a high-frequency electrification transfer method, so that the human body is, for example, about 20 cm (this is an example of a distance for detecting proximity, and is not limited thereto). A signal is output when approaching a distance.

  As shown in FIG. 1C, the mobile terminal 10 includes an antenna 101, a wireless communication unit 111, a physical operation key 131, an acceleration sensor 132, a grip sensor 134, a proximity sensor 135, and an input receiving unit ( Touch panel) 141, display 142, power supply control unit 144, battery 145, sound processing unit 146, microphone 147, speaker 148, storage unit 150, and control unit 160.

  The antenna 101 radiates a signal emitted from the mobile terminal 10 as a radio wave. Further, the antenna 101 receives radio waves from the space and gives a reception signal to the wireless communication unit 111. In the present embodiment, the mobile terminal 10 is compatible with a plurality of wireless communication standards. As communication methods, there are W-CDMA (Wideband Code Division Multiple Access), LTE (Long Term Evolution), and other communication methods. The mobile terminal 10 also supports wireless LAN standards such as IEEE (Institute of Electrical and Electronic Engineers) 802.11.

  The wireless communication unit 111 performs modulation / demodulation processing for transmitting and receiving signals via the antenna 101 and the like so that the mobile terminal 10 communicates with other wireless devices. The wireless communication unit 111 is a communication module including a tuner, an RSSI (Received Signal Strength Indicator) calculation circuit, a CRC (Cyclic Redundancy Check) calculation circuit, a high-frequency circuit, and the like. The wireless communication unit 111 performs modulation / demodulation and frequency conversion of a wireless signal transmitted / received by the mobile terminal 10 and provides a received signal to the control unit 160.

  The physical operation key 131 is a physical input device and accepts a pressing operation by the user. The physical operation key 131 outputs a signal indicating the operation content to the control unit 160 in response to a user's pressing operation.

  The acceleration sensor 132 is a sensor for detecting the tilt of the mobile terminal 10 as acceleration in the direction of gravity, and is, for example, a three-axis acceleration sensor. The acceleration sensor 132 outputs the detected triaxial acceleration to the control unit 160.

  The touch panel 141 receives user input operations. The touch panel 141 detects a user's contact position by using, for example, a capacitive type. The touch panel 141 outputs a signal indicating the detected contact position of the user to the control unit 160 as an input operation.

  The display 142 displays data such as an image, a moving image, and text under the control of the control unit 160. The display 142 is realized by, for example, an LCD (Liquid Crystal Display) or an organic EL (Electro-Luminescence) display.

  The power control unit 144 controls power supply to each circuit of the mobile terminal 10. The power control unit 144 is, for example, a power control IC (Integrated Circuit). The battery 145 is a supply source that supplies power for operating each circuit of the mobile terminal 10. The electric power from the battery 145 is supplied to each circuit according to the control of the power supply control unit 144. The audio processing unit 146 performs modulation / demodulation of the audio signal. The audio processing unit 146 modulates the signal given from the microphone 147 and gives the modulated signal to the control unit 160. In addition, the audio processing unit 146 provides an audio signal to the speaker 148. The audio processing unit 146 is realized by a processor for audio processing, for example. The microphone 147 receives an audio input and provides an audio signal corresponding to the audio input to the audio processing unit 146. The speaker 148 converts the audio signal provided from the audio processing unit 146 into audio and outputs the audio to the outside of the mobile terminal 10.

  The storage unit 150 is configured by a flash memory, for example, and stores data and programs used by the mobile terminal 10.

  The control unit 160 reads the control program stored in the storage unit 150 and controls the operation of the mobile terminal 10 by executing instructions included in the control program. The control unit 160 is, for example, an application processor. The control unit 160 operates in accordance with the program, so that the physical operation key input detection unit 161, the grip detection unit 162, the terminal direction detection unit 163, the key operation lock switching unit 164, the call start control unit 165, Functions as the mode switching unit 166 and the proximity detection unit 167 are exhibited.

  The physical operation key input detection unit 161 detects that the physical operation key 131 is pressed based on a signal output from the physical operation key 131, and the user's input operation (for example, FIG. When the physical operation key 131 is composed of a plurality of keys as shown in FIG. 1A, which key is pressed is identified.

  The grip detection unit 162 determines whether or not the user is gripping the mobile terminal 10 by hand based on the output value output from the grip sensor 134.

  Based on the output value output from the acceleration sensor 132, the terminal direction detection unit 163 determines whether the front surface of the mobile terminal 10 (the surface of the housing of the mobile terminal 10 on which the display 142 is disposed) is in the direction of gravity. Or it determines whether it is not suitable for the direction of gravity. Specifically, it will be described later in the description using FIG.

  The key operation lock switching unit 164 invalidates the input operation by the physical operation key 131 based on the processing by the grip detection unit 162 and the terminal direction detection unit 163, that is, based on the output value of the grip sensor 134 and the output value of the acceleration sensor 132. Or enable. The key operation lock switching unit 164 is determined by the grip detection unit 162 that the mobile terminal 10 is not gripped by the user while the mobile terminal 10 is waiting for an incoming call, and the display of the casing of the mobile terminal 10 It is determined by the terminal direction detection unit 163 that the surface on which the 142 is disposed is directed in the direction of gravity (detected that the surface on which the display 142 of the housing of the mobile terminal 10 is disposed is directed in the direction of gravity). In this case, the input operation by the physical operation key 131 is invalidated. In the first embodiment, the key operation lock switching unit 164 validates an input operation on the physical operation key 131 when the mobile terminal 10 is held by the user.

  The call start control unit 165 starts a hands-free call or starts a normal call based on the output value of the acceleration sensor 132 and the output value of the grip sensor 134 when the mobile terminal 10 receives an incoming call from another terminal. Control what to do. When the incoming call is received, the call start control unit 165 determines that the mobile terminal 10 is not gripped by the user by the grip detection unit 162, and the surface on which the display 142 of the housing of the mobile terminal 10 is arranged faces in the direction of gravity. The physical direction key input detection unit 161 indicates that the input operation to the physical operation key 131 has been performed when the terminal direction detection unit 163 determines that the mobile terminal 10 is in a prone state with the display 142 facing down. If detected, a hands-free call is started. In the hands-free call state, the mobile terminal 10 outputs a call voice from the speaker 148. When the call start control unit 165 determines that the mobile terminal 10 is held by the user by the grip sensor 134 at the time of an incoming call, the call start control unit 165 performs a normal call in response to the call start button being pressed as an input operation to the physical operation key 131. Start.

  The call mode switching unit 166 includes an output value of the grip sensor 134 (determination result by the grip detection unit 162) and an output value of the acceleration sensor 132 (terminal direction detection unit 163) when the mobile terminal 10 is in a normal call or hands-free call state. Based on the determination result), a process of switching the normal call state to the hands-free call state or a process of switching the hands-free call state to the normal call state is performed.

  The proximity detection unit 167 detects that a detection target (for example, a human body) is approaching the mobile terminal 10 based on an output value output from the proximity sensor 135.

  Referring to FIG. 2, whether the mobile terminal 10 has the display 142 oriented in the direction of gravity (in a prone state) or not in the direction of gravity (in a state other than prone, for example, the mobile terminal 10 is set up vertically. The state in which the mobile terminal 10 is gripped by the user, and the process of determining the state of the head, the state of facing the head, and other states) based on the output of the acceleration sensor 132, will be described.

  FIG. 2 is a diagram illustrating the relationship between the output value output from the acceleration sensor 132 and the direction in which the display surface of the casing of the mobile terminal 10 faces, and how the user is holding the mobile terminal 10. FIGS. 2A and 2B are cross-sectional views taken along the line II-II ′ in FIG.

  FIG. 2A is a diagram showing an output of the acceleration sensor 132 in a state where the mobile terminal 10 is placed on a desk or the like with the display surface facing upward. As shown in FIG. 2A, the acceleration sensor 132 is installed on the substrate B of the mobile terminal 10. When the display surface (front side) of the casing of the mobile terminal 10 is placed on a desk or the like with the upper side (facing the chin), the acceleration sensor 132 is such that the display surface of the casing of the mobile terminal 10 faces the direction of gravity. (For example, when the direction of gravity is the Z-axis, for example, the Z-axis (+), that is, the Z-axis upward value) is output. As shown in FIG. 2 (B), when the display surface (front side) of the casing of the mobile terminal 10 is placed on a desk or the like with the display surface (front side) of the mobile terminal 10 in a lower side (side down), the mobile terminal 10 A value (Z-axis (−), that is, a downward value on the Z-axis) indicating that the display surface of the housing of FIG.

  FIG. 2C is a diagram illustrating a state where the user is holding the left side of the housing in front of the mobile terminal 10 with the left hand. For example, as illustrated in FIG. 2C, the grip detection unit 162 is configured so that when the grip sensor 134 disposed on the left side detects a user's contact in a wide range on the front surface of the mobile terminal 10, the user It is determined that the left side of the housing is gripped with the left hand in front of the.

<Operation>
With reference to FIG. 3, the operation of the mobile terminal 10 will be described.

  FIG. 3 is a flowchart illustrating processing in which the portable terminal 10 invalidates the input operation using the physical operation key 131 based on the output value of the grip sensor 134 and the output value of the acceleration sensor 132. The mobile terminal 10 waits until the input operation by the physical operation key 131 is performed while the mobile terminal 10 is waiting for an incoming call in the process illustrated in FIG. 3, and the input operation to the physical operation key 131 is detected by the physical operation key input detection unit 161. By detecting by (1), the processing after step S2 is performed (step S1).

  In step S <b> 2, the control unit 160 determines based on the output value of the grip sensor 134 whether or not the grip sensor 134 has detected that the mobile terminal 10 is being held by the user. When it is determined that the mobile terminal 10 is held by the user (“detection” in step S2), the control unit 160 performs the process of step S5. Otherwise (“non-detection” in step S2), step The process of S3 is performed.

  In step S <b> 3, based on the output value of the acceleration sensor 132, the control unit 160 determines whether the surface of the casing of the mobile terminal 10 on which the display 142 is disposed is facing the gravitational direction (Z-axis in the example of FIG. 2). (-) Direction) or whether it is not directed in the direction of gravity (for example, the Z-axis (+) direction). When it is determined that the surface of the casing of the mobile terminal 10 on which the display 142 is disposed faces the direction of gravity (“Z-axis (−) direction (downward direction)” in step S3), the control unit 160 If the process of step S4 is performed and it is determined that the direction of gravity is not directed ("Z-axis (+) direction (upward)" in step S3), the process of step S5 is performed.

  In step S4, the control unit 160 performs a process of invalidating the input operation using the physical operation key 131, and returns to the process of step S1.

  In step S <b> 5, the control unit 160 validates the input operation using the physical operation keys 131 and performs processing according to the content of the user's pressing operation.

<Summary of Embodiment 1>
For example, when the mobile terminal 10 is placed on a desk or the like with the display 142 facing down (with the front of the mobile terminal 10 facing down), if a pressing pressure is applied from the back side of the casing of the mobile terminal 10, Since the key 131 is pressed from the desk surface, it may cause a malfunction. On the other hand, according to the mobile terminal 10 of the first embodiment, the mobile terminal 10 recognizes (a) the user is holding the casing of the mobile terminal 10 and (b) the orientation of the mobile terminal 10. Thus, the mobile terminal 10 can specify that “the mobile terminal 10 is placed on a desk or the like with the display screen facing down (side down)”. In this case, it is possible to prevent malfunction by disabling the physical operation keys 131 arranged on the same surface as the display screen.

<Embodiment 2>
With reference to FIG. 4 to FIG. 6, the operation of the mobile terminal 10 in the second embodiment will be described.

  The mobile terminal 10 according to Embodiment 2 is a mobile terminal that receives a call from another terminal in the terminal (FIG. 1B) in which the speaker 148 is arranged on the back of the casing of the mobile terminal 10. When the input operation to the physical operation key 131 is detected by pressing from the back side of FIG. Further, when the state of the mobile terminal 10 (the state in which the mobile terminal 10 is held and the inclination of the mobile terminal 10) changes, the mobile terminal 10 switches from the hands-free call to the normal call. Thus, when the mobile terminal 10 is placed with the display screen facing down on a desk or the like, a hands-free call can be made when an incoming call is received without the user holding the mobile terminal 10.

  FIG. 4 is a flowchart illustrating processing in which the mobile terminal 10 according to the second embodiment switches between a hands-free call and a normal call when an incoming call is received. The mobile terminal 10 starts the process shown in FIG. 4 when the mobile terminal 10 detects an incoming call (step S21).

  In step S <b> 22, the control unit 160 determines whether or not the grip sensor 134 has detected that the mobile terminal 10 is being held by the user, based on the output value of the grip sensor 134. When it is determined that the mobile terminal 10 is held by the user (“detection” in step S22), the control unit 160 performs the process of step S26. Otherwise (“non-detection” in step S22), step The process of S23 is performed.

  In step S <b> 23, based on the output value of the acceleration sensor 132, the control unit 160 determines that the surface of the casing of the mobile terminal 10 on which the display 142 is disposed is facing the gravitational direction or the gravitational direction. Determine if there is any. When it is determined that the surface of the casing of the mobile terminal 10 on which the display 142 is disposed is facing the direction of gravity (“Z-axis (−) direction (downward)” in step S23), the control unit 160 If the process of step S24 is performed and it is determined that the direction of gravity is not directed ("Z-axis (+) direction (upward)" in step S23), the process of step S26 is performed.

  In step S <b> 24, the control unit 160 determines whether an input operation on the physical operation key 131 is detected. When it is determined that an input operation to the physical operation key 131 is detected (“Yes” in Step S24), the control unit 160 performs the process of Step S25. Otherwise (“No” in Step S24), the control unit 160 receives an incoming call. The process returns to step S22 while maintaining the detection.

  In step S <b> 25, the control unit 160 performs processing for responding to the incoming call, starts a hands-free call, and outputs a call voice from the speaker 148 installed on the back surface of the casing of the mobile terminal 10.

  In step S <b> 26, the control unit 160 validates the input operation on the physical operation key 131.

  In step S <b> 27, the control unit 160 starts a normal call by detecting an input operation to the call start button of the physical operation key 131.

  FIG. 5 is a flowchart illustrating a process of switching to a normal call when the mobile terminal 10 according to the second embodiment has a display surface of the mobile terminal 10 facing down (downside down) and performing a hands-free call. . Based on the output of the acceleration sensor 132, the mobile terminal 10 is shown in FIG. 5 with the display surface of the casing of the mobile terminal 10 facing the gravitational direction (downward) and performing a hands-free call. The process shown is performed (step S221).

  In step S223, based on the output value of the acceleration sensor 132, the control unit 160 has no change in the attitude of the mobile terminal 10 (whether the display surface remains in the direction of gravity) or has changed ( Whether the display surface is facing in the other direction instead of the gravity direction). When it is determined that there is no change in the direction of the surface of the mobile terminal 10 where the display 142 is disposed (“no change” in step S223, that is, “Z-axis (−) direction (downward)”). The control unit 160 repeatedly performs the process of step S223, and when it is determined that there is a change (“changed” in step S223, that is, “other directions”), performs the process of step S224.

  In step S224, the control unit 160 determines based on the output value of the grip sensor 134 whether or not the grip sensor 134 has detected that the mobile terminal 10 is being held by the user. When it is determined that the mobile terminal 10 is held by the user (“detection” in step S224), the control unit 160 performs the process of step S225, and otherwise (“non-detection” in step S24). The process of S223 is performed.

  In step S225, the control unit 160 shifts from the hands-free call state to the normal call state.

  FIG. 6 shows that the mobile terminal 10 according to the second embodiment detects that the display surface of the mobile terminal 10 faces downward (turns down) and the user does not hold the mobile terminal 10 in a normal call state. It is a flowchart which shows the process which transfers to a hands-free call. The mobile terminal 10 performs the process shown in FIG. 6 in the normal call state (step S231).

  In step S233, the control unit 160 determines whether or not the grip sensor 134 has detected that the mobile terminal 10 is being held by the user, based on the output value of the grip sensor 134. When it is determined that the mobile terminal 10 is held by the user (“detection” in step S233), the control unit 160 repeats the process of step S233, and otherwise (“non-detection” in step S233). The process of step S234 is performed.

  In step S234, based on the output value of the acceleration sensor 132, the control unit 160 determines that the surface of the housing of the mobile terminal 10 on which the display 142 is disposed is directed in the direction of gravity, or is directed in the other direction. Judge whether it is. When it is determined that the surface of the casing of the mobile terminal 10 on which the display 142 is disposed is oriented in the direction of gravity (“− direction (downward)” in step S234), the control unit 160 proceeds to step S235. When the process is performed and it is determined that the direction is not the direction of gravity but the other direction (“other” in step S234), the process of step S233 is performed.

  In step S235, the control unit 160 shifts from the normal call state to the hands-free call state.

<Summary of Embodiment 2>
The mobile terminal 10 according to the second embodiment prevents a malfunction that is not intended by the user by detecting a state in which the display screen is faced down and placed on the desk. Further, in a terminal in which the speaker 148 is arranged on the back surface of the casing of the mobile terminal 10, when an incoming call is received from another terminal, an input operation to the physical operation key 131 by pressing from the back surface of the mobile terminal 10. Make a hands-free call when there is a call. Further, when the state of the mobile terminal 10 (the state in which the mobile terminal 10 is held and the inclination of the mobile terminal 10) changes, the mobile terminal 10 switches from a hands-free call to a normal call. Thus, when the mobile terminal 10 is placed with the display screen facing down on a desk or the like, a hands-free call can be made when an incoming call is received without the user holding the mobile terminal 10. In addition, in a normal call state, the user can shift from a normal call to a hands-free call by placing the display surface of the mobile terminal 10 face down on a desk or the like. For example, since the user talks with a plurality of people around the user from a state in which the user is talking through a normal call, the user can easily shift to a hands-free call.

<Embodiment 3>
With reference to FIG. 7, the portable terminal 10 of Embodiment 3 is demonstrated. In addition to the operation of the first embodiment, the mobile terminal 10 of the third embodiment realizes the prevention of malfunction by combining the detection results by the proximity sensor 135. For example, when the mobile terminal 10 is held by the user while the mobile terminal 10 is placed on a desk or the like, the proximity sensor 135 installed on the surface of the casing of the mobile terminal 10 on which the display 142 is placed is used. It is determined whether or not the user is close. When the user is holding the mobile terminal 10 and the proximity sensor 135 does not detect the proximity of the user, the mobile terminal 10 maintains the invalidation of the physical operation key 131 to prevent malfunction, and the user When the proximity sensor 135 detects the proximity of the user, the physical operation key 131 is validated according to the output result of the acceleration sensor 132. Thus, even if the user holds the mobile terminal 10 while the mobile terminal 10 is placed on the desk, the physical operation key 131 is disabled until the proximity sensor 135 detects the proximity of the user. It is possible to avoid a malfunction due to the physical operation key 131 being erroneously pressed when the terminal 10 is held.

  FIG. 7 shows whether the portable terminal 10 of Embodiment 3 validates or invalidates the input operation by the physical operation key 131 based on the output values of the grip sensor 134, the physical operation key 131, and the proximity sensor 135. It is a flowchart which shows the process to control. The mobile terminal 10 waits for an input operation to the physical operation key 131 in the incoming call waiting state until the input operation to the physical operation key 131 is performed. By detecting at step S32, the processing after step S32 is started (step S31).

  In step S <b> 32, the control unit 160 determines based on the output value of the grip sensor 134 whether or not the grip sensor 134 has detected that the mobile terminal 10 is being gripped by the user. When it is determined that the mobile terminal 10 is held by the user (“detection” in step S32), the control unit 160 performs the process of step S35, and otherwise (“non-detection” in step S32). The process of S33 is performed.

  In step S <b> 35, based on the output value of the proximity sensor 135, the control unit 160 determines that the proximity sensor 135 installed on the surface of the casing of the mobile terminal 10 on which the display 142 is disposed is on the front of the mobile terminal 10. It is determined whether or not a proximity object (for example, a user) has been detected. When the proximity sensor 135 detects a proximity object (“detection” in step S35), the control unit 160 performs the process of step S33. Otherwise (“non-detection” in step S35), the control unit 160 performs the process of step S36. .

  In step S <b> 33, based on the output value of the acceleration sensor 132, the control unit 160 determines that the surface of the casing of the mobile terminal 10 on which the display 142 is disposed is facing the gravitational direction or the gravitational direction. Whether there is any (for example, Z-axis (+) direction) is determined. When it is determined that the surface of the casing of the mobile terminal 10 on which the display 142 is disposed is facing the direction of gravity (“− direction (downward direction)” in step S33), the control unit 160 proceeds to step S34. If it is determined that the direction of gravity is not directed (“+ direction (upward)” in step S3)), the process of step S36 is performed.

  In step S34, the control unit 160 performs a process of invalidating the input operation using the physical operation key 131, and returns to the process of step S31.

  In step S <b> 36, the control unit 160 validates the input operation using the physical operation key 131 and performs processing according to the content of the user's pressing operation.

<Summary of Embodiment 3>
According to the mobile terminal 10 of the third embodiment, in addition to the configuration of the first embodiment, the proximity sensor 135 detects the proximity of the user to the display surface, so that the mobile terminal 10 remains on the desk. Even if it is grasped by the user, it is possible to keep malfunction prevention effective.

  The electronic device according to the present embodiment is realized by a processor and a program executed on the processor. The program for realizing the present embodiment is provided by transmission / reception using a network via a communication interface.

  The embodiment disclosed this time must be considered as illustrative in all points and not restrictive. The scope of the present invention is defined by the terms of the claims, rather than the description above, and is intended to include any modifications within the scope and meaning equivalent to the terms of the claims.

  10 mobile terminal, 101 antenna, 111 wireless communication unit, 131 physical operation key, 132 acceleration sensor, 134 grip sensor, 135 proximity sensor, 141 input reception unit, 142 display, 144 power supply control unit, 145 battery, 146 sound processing unit, 147 Microphone, 148 speaker, 150 storage unit, 160 control unit, 161 physical operation key input detection unit, 162 grip detection unit, 163 terminal direction detection unit, 164 key operation lock switching unit, 165 call start control unit, 166 call mode switching Part, 167 Proximity detection part.

Claims (4)

A portable terminal having a display,
A first sensor for detecting that a user is holding the casing of the mobile terminal ;
A second sensor for detecting the tilt of the mobile terminal;
Operation keys installed on the same surface as the display of the housing;
Call function ,
A control unit for controlling the operation of the mobile terminal,
The controller is
When an incoming call is received, based on the output values of the first and second sensors, the portable terminal is not gripped by the user, and the display surface of the casing of the portable terminal is directed in the direction of gravity. If it is detected, including call start control unit for starting hands-free conversation by detecting the depression of the operation key, the mobile terminal. The controller is
When it is detected that the mobile terminal is gripped by the user and the display surface of the casing of the mobile terminal is not oriented in the direction of gravity in the state where the hands-free call is started by the call start control unit the is configured to transition to the normal call from the hands-free call, the mobile terminal according to claim 1. The controller is
In a normal call state, based on the output values of the first and second sensors, the portable terminal is not gripped by the user, and the display surface of the casing of the portable terminal faces in the direction of gravity. The mobile terminal according to claim 1, wherein the mobile terminal is configured to shift from the normal call to the hands-free call when it is detected. A portable terminal having a display,
A first sensor for detecting that a user is holding the casing of the mobile terminal ;
A second sensor for detecting the tilt of the mobile terminal;
A third sensor installed on the same surface as the display of the housing for detecting a proximity object ;
Operation keys installed on the same surface as the display of the housing;
A control unit for controlling the operation of the mobile terminal,
The controller is
An input detection unit for detecting that the operation key is pressed;
A key operation lock switching unit that invalidates the input operation by the operation keys,
The key operation lock switching unit of the control unit is based on output values of the first sensor, the second sensor, and the third sensor,
When it is detected that the mobile terminal is not gripped by the user and the display surface of the casing of the mobile terminal faces the direction of gravity, the input operation by the operation key is invalidated,
When the portable terminal is gripped by the user and the proximity object is not detected, the input operation by the operation key is enabled,
When the portable terminal is gripped by the user, the proximity object is detected , and when it is detected that the display surface of the casing of the portable terminal is not oriented in the direction of gravity, input by the operation key A mobile device that is configured to enable operations.

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