JP2008219245A - Communication terminal device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a user-friendly communication terminal device facilitating switching between hands-free call and handset call, without operating a key or a switch. <P>SOLUTION: The communication terminal device available in hands-free call or handset call by switching. The device comprises a speaker for handset used for handset call, a speaker for hands-free used for hands-free call, a microphone used both for handset call and hands-free call, and a human sensing means. When the human sensing means senses a human body within a predetermined short distance from the speaker for handset the device is switched to the handset call, and when a human body is not sensed within the predetermined short distance, the device is switched to the hands-free call. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a communication terminal device capable of a handset call and a hands-free call, and more particularly to a switching technique for these calls.

  As a conventional mobile phone that can be used as both a handset phone and a hands-free phone, for example, one described in Patent Document 1 is known. The mobile phone described in Patent Document 1 is provided with a changeover switch on a lid provided in a speaker, so that when used as a hands-free phone, the lid is opened to switch to a hands-free phone, and when used as a handset phone, the lid is closed. Switching to a handset phone.

  In addition to the configuration in which the lid provided on the speaker is used as a switch as described above, there is a configuration in which switching is provided by pressing a key for switching.

JP 2001-285428 A

  In the conventional mobile phone described above, when switching between a hands-free call and a handset call, it is necessary for the user to manually switch by operating a switch (lid) or key provided on the casing. . However, in recent years, mobile phones are required to have various functions and the number of keys and switches tends to increase, so it is difficult to secure a space for arranging keys and switches in a limited capacity. There was a problem that there was. In addition, since there are many keys and switches, it is difficult to recognize keys and switches for switching between hands-free calling and handset calling, and there is a problem that usability is poor.

  The present invention has been made in view of the above-described problems, and an object of the present invention is to provide a communication terminal device that does not require a switching key or switch, is easy to switch between a hands-free call and a handset call, and is easy to use.

  A communication terminal device according to a first aspect of the present invention is capable of switching between a handset call and a hands-free call. The handset speaker outputs a received voice during the handset call, and the call is received during the hands-free call. A hands-free speaker that outputs sound; a microphone that collects transmitted speech by switching between the handset and hands-free; and a human body sensing means capable of sensing a human body within a predetermined short distance from the handset speaker; A controller that controls the human body sensing means to switch to the handset call when the human body is sensed within the predetermined short distance and to switch to the handsfree call when the human body is not sensed within the predetermined short distance. And the control unit is configured to communicate the handset during the handset call. The handset speaker is activated to deactivate the handsfree speaker and the microphone is switched to a handset. During the handsfree call, the handset speaker is deactivated and the handsfree speaker is activated to hand the microphone. It is intended to switch to free.

  According to the first invention, the human body sensing means capable of sensing a human body within a predetermined short distance from the handset speaker switches to a handset call when the human body is detected within the predetermined short distance, and the predetermined short distance is detected. Since control is performed to switch to a hands-free call when a human body is not sensed within a distance, operations such as keys and switches are unnecessary, and the convenience of switching between a handset call and a hands-free call can be improved.

Embodiment 1 FIG.
FIG. 1 is a block diagram showing a configuration of a communication terminal device (mobile phone) according to Embodiment 1 of the present invention. Reference numeral 1 denotes a pulse wave transmitter, and reference numeral 2 denotes a pulse wave receiver that receives a reflected wave of the pulse wave transmitted from the pulse wave transmitter 1. The pulse wave transmitter 1 and the pulse wave receiver 2 are human body sensing means that can sense a human body within a predetermined distance by measuring the transmission interval of the pulse wave and the reception interval of the reflected wave. Although they are configured as separate devices in FIG. 1, a pulse wave transmitter / receiver in which these devices are integrated can be substituted.

  A microprocessor 3 outputs a command based on a control program stored in a storage device (not shown) to operate the pulse wave transmitter 1 and processes information on the reflected wave observed by the pulse wave receiver 2. The mobile phone can be used as both a handset phone and a hands-free phone. The handset speaker 4 is used to output the voice from the other party during a handset call, and the voice from the other party during a handsfree call. Is provided with a hands-free speaker 5 used for outputting the sound and a microphone 6 for collecting the user's voice. Under the control of the microprocessor 3, switching between the handset speaker 4 and the hands-free speaker 5, switching the sound collection sensitivity of the microphone 6, or the amplification factor of a voice amplifier (not shown) is performed. Switch. In addition, the mobile phone includes a storage device that stores programs, data, and the like, a display unit that displays information, a key operation unit that allows a user to perform operations such as dialing, and a wireless communication unit that transmits and receives radio. The description is omitted.

  FIG. 2 shows an external view of the mobile phone according to Embodiment 1 of the present invention. Currently, the main shapes of mobile phones include a straight type, a two-fold type, and a slide type. In the first embodiment, a straight type will be described as an example. The same reference numerals as those in FIG. 1 denote the same components.

  In FIG. 2, the pulse wave transmitter 1 and the pulse wave receiver 2 described above are provided adjacent to a handset speaker 4 that is used so that the user's ear is in contact with the handset during a call. Then, the pulse transmission port of the pulse wave transmitter 1 and the pulse observation port of the pulse wave receiver 2 are disposed adjacent to substantially the same plane as the opening of the handset speaker 4. With this arrangement, the user's ear is very close to the pulse transmission port of the pulse wave transmitter 1 and the pulse observation port of the pulse wave receiver 2 during a handset call. The pulse wave transmitted from the machine 1 is reflected at or near the user's ear, and the reflected wave is observed by the pulse wave receiver 2 in a very short time. That is, when the pulse wave observation time is short, it is determined that the user is holding a terminal that desires a handset call, and the voice of the other party is output only to the handset speaker 4. Can be controlled.

  From the above, the pulse wave transmitter 1 and the pulse wave receiver 2 are used for the handset speaker unit in order to measure and judge whether the user has a handset call or a hands-free call. 4 is most effective.

  Next, the operation of the mobile phone according to Embodiment 1 of the present invention will be described based on the flowchart of FIG. First, when the user starts a call, a pulse wave is transmitted from the pulse wave transmitter 1 in step ST11. In step ST12, it is determined whether or not the transmitted pulse wave hits the user and the reflected pulse wave is observed by the pulse wave receiver 2, and if it is observed (step ST12: Y), the reflected wave is received from the transmission of the pulse wave. The distance between the mobile phone and the user is estimated from the time T required until the time. That is, when a call is made by directly placing a mobile phone called a handset call on the ear, the user and the mobile phone are almost in close contact with each other, so the distance is very short and a pulse wave is transmitted. The time T from when the reflected wave is received to an extremely short time. Conversely, when a call is made without placing a mobile phone called a hands-free call on the ear, the mobile phone is away from the user, so the distance becomes longer and the time T becomes longer depending on the distance to the user. Become.

  Therefore, in step ST13, the time T from transmission of the pulse wave to reception is compared with the specified time t, and if the time T is within the specified time t seconds (step ST13: Y), It is determined that the user is in close contact (or close range), and control is performed so that a handset call can be performed. That is, if the handset speaker 4 is in operation, it is switched to the handset speaker 4 if it is not operating, and the other party's voice is output (step ST14). Further, if the time T is longer than the specified time t seconds (step ST13: N), it is determined that the mobile phone and the user are separated (not close to each other), so that hands-free calling can be performed. The other party's voice is output to the speaker 5 (step ST16).

  On the other hand, if the pulse wave receiver 2 cannot observe the reflected pulse wave in step ST12 (step ST12: N), it can be determined that the mobile phone is away from the user and a hands-free call can be made. In this manner, control is performed so that the other party's voice is output to the handsfree speaker 5 (step ST16).

  After the other party's voice is output to the handset speaker 4 (step ST14) or the other party's voice is output to the handsfree speaker 5 (step ST16), it is determined whether or not the call is ended in step ST15. If this is the case (step ST15: N), the process returns to step ST11 again to perform a process of transmitting a pulse wave from the pulse wave transmitter 1, and the following steps are repeated until it is determined that the call has ended (step ST15: Y).

  Thereby, even when the user changes the way of holding the mobile phone in the middle of a call, the outputs of the handset speaker 4 and the hands-free speaker 5 can be switched to a state suitable for the way of holding the user. If the result of determination in step ST12 or step ST13 is the same as the previous state, the switching process in step ST14 or step ST16 can be omitted.

  In the above description of the operation, as a method of confirming “whether the user is in close contact with the terminal” (corresponding to step ST13), a time T from when a pulse wave is transmitted to when it is received is measured, and this is a specified time t. It is assumed that it is determined whether it is within seconds. Here, as an example, a method of setting time t when using ultrasonic waves for pulse waves and determining that the user is in close contact with the terminal within a distance of 5 cm will be described.

  When an ultrasonic wave is used for the pulse wave, the speed at which the ultrasonic wave propagates in the air is a sound speed of 330 meters / second. If the distance between the user and the terminal is 5 centimeters, the round trip distance of the pulse wave is 0.1 meter, so the time from transmitting the pulse wave to receiving the reflected wave is 1/3300 seconds (about 0 .0003 seconds). That is, when the time t is set to 1/3300 seconds and the measurement time T is within t (= 1/3300) seconds, the user is within 5 centimeters (closely) from the terminal. Judgment can be made.

  According to the above, switching between a handset call and a hands-free call is automatically switched depending on the user's way of holding the mobile phone (distance between the mobile phone and the user), so there is no need to perform a user switching operation. Therefore, the operability is improved. In addition, since keys and switches that are necessary for the switching operation are not required, a large arrangement space can be secured for other keys.

Embodiment 2. FIG.
FIG. 4 is a block diagram showing a mobile phone according to Embodiment 2 of the present invention. Components denoted by the same reference numerals as those in FIG. Reference numeral 7 denotes a camera module for taking a self-portrait, and this mobile phone takes a picture of the user during a call and transmits it to the other party of the call. A videophone call is made by displaying on the screen. When making a videophone call, the other party's voice is output from the handsfree speaker 5 and the microphone 6 has high sensitivity so that the voice of a remote user can be collected, as in the handsfree call of the first embodiment. Alternatively, the voice amplifier is controlled to amplify the user's voice. Also in the mobile phone of the second embodiment, the pulse wave transmitter 1 and the pulse wave receiver 2 are provided adjacent to the handset speaker 4 in the same manner as shown in FIG. 2 of the first embodiment.

  Next, the operation of the mobile phone according to Embodiment 2 of the present invention will be described based on the flowchart of FIG. First, when the user starts a call, a pulse wave is transmitted from the pulse wave transmitter 1 in step ST21. In step ST22, it is determined whether the transmitted pulse wave hits the user and the pulse wave receiver 2 has observed the reflected pulse wave, and if it is observed (step ST22: Y), the reflected wave is received from the transmission of the pulse wave. The time T required until this time is compared with the specified time t (step ST23). If the measurement time T is within the specified time t (step ST23: Y), it is determined that the mobile phone and the user are in close contact with each other (or are in close proximity), and the handset can be used for a handset call. In addition to switching to output the other party's voice to the speaker 4 (step ST24), the camera module 7 is turned off (inactive) and switched to a voice call without an image (step ST25). Also, if the measurement time T is longer than the specified time t seconds (step ST23: N), it is determined that the mobile phone and the user are separated (not close to each other), so that hands-free calling can be performed. In addition to switching to output the other party's voice to the speaker 5 for use (step ST26), the camera module 7 is turned on (operating state) and switched to a videophone call (step ST27).

  On the other hand, if the pulse wave receiver 2 cannot observe the reflected pulse wave in step ST22 (step ST22: N), it can be determined that the mobile phone is away from the user and a hands-free call can be performed. As described above, the other party's voice is switched to be output to the handsfree speaker 5 (step ST26), and the camera module 7 is turned on (operating state) to switch to the videophone call (step ST27).

  Output the other party's voice to the handset speaker 4 (step ST24) and turn off the camera module 7 (step ST25), or output the other party's voice to the handsfree speaker 5 (step ST16) and turn on the camera module 7 (step ST27). ) Is performed, it is determined whether or not the call is ended in step ST28. If the call is not ended (step ST28: N), the process returns to step ST21 again to perform a process of transmitting a pulse wave from the pulse wave transmitter 1, The following steps are repeated until it is determined that the call has ended (step ST28: Y).

  Thus, even when the user changes the way of holding the mobile phone in the middle of a call, the output of the handset speaker 4 and the hands-free speaker 5 and the ON / OFF of the camera module 7 are changed to the way of holding the user. It can be switched to a suitable state. If the result of determination in step ST22 or step ST23 is the same as the previous state, the switching process in steps ST24, ST25, ST26, and ST27 can be omitted.

  According to the above, switching between a handset call and a videophone call is automatically switched depending on the user's way of holding the mobile phone (distance between the mobile phone and the user), so that it is not necessary to perform a user switching operation. Therefore, the operability is improved. In addition, since keys and switches that are necessary for the switching operation are not required, a large arrangement space can be secured for other keys.

  In the above embodiment, the pulse wave transmitter 1 and the pulse wave receiver 2 are used as human body sensing means for measuring the distance between the mobile phone (in the vicinity of the handset speaker) and the user. It is determined whether or not the mobile phone and the user are in close contact with each other by using other sensors such as a handset speaker 4, a hands-free speaker 5, a microphone 6 and a camera module 7. Similar effects can be obtained by performing similar control.

1 is a block diagram of a mobile phone according to Embodiment 1 of the present invention. 1 is an external view of a mobile phone according to Embodiment 1 of the present invention. It is an operation | movement flowchart of the mobile telephone which concerns on Embodiment 1 of this invention. It is a block diagram of the mobile telephone which concerns on Embodiment 2 of this invention. It is an operation | movement flowchart of the mobile telephone based on Embodiment 2 of this invention.

Explanation of symbols

1 pulse wave transmitter, 2 pulse wave receiver, 3 microprocessor,
4 Handset speaker, 5 Hands-free speaker, 6 Microphone,
7 Camera module.

Claims (4)

In a communication terminal device capable of switching between a handset call and a hands-free call,
A speaker for a handset that outputs a received voice during the handset call,
A hands-free speaker that outputs a received voice during the hands-free call,
A microphone that collects the transmitted voice by switching between the handset and the handsfree,
Human body sensing means capable of sensing a human body within a predetermined short distance from the handset speaker;
A controller for controlling the human body sensing means to switch to the handset call when a human body is sensed within the predetermined short distance and to switch to the handsfree call when no human body is sensed within the predetermined short distance; Prepared,
The control unit operates the handset speaker during the handset call to deactivate the handsfree speaker, switches the microphone to the handset, and deactivates the handset speaker during the handsfree call. A communication terminal device that operates a hands-free speaker and switches the microphone to a hands-free operation. Furthermore, it has a camera module for TV phone,
2. The control unit according to claim 1, wherein the control unit controls the camera module to be inactive during the handset call and to switch to a videophone call by operating the camera module during the hands-free call. Communication terminal device. The human body sensing means includes a pulse wave transmitter and a pulse wave receiver,
When the time from when the pulse wave is transmitted by the pulse wave transmitter to when the pulse wave is received by the pulse wave receiver is shorter than a predetermined time, the control unit is within the predetermined short distance. 3. The communication terminal device according to claim 1, wherein it is determined that a human body is not detected within the predetermined short distance in other cases.   The communication terminal apparatus according to claim 1, wherein the control unit repeatedly performs the control when the communication terminal apparatus is in a call state.

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