JP2001223784A - Output switching circuit for portable terminal - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an output switching circuit for a portable terminal which makes it possible to carry on a conversation while the voice of a call partner is heard even when a terminal speaking person puts the portable terminal away from the ear during a call. SOLUTION: This portable terminal is equipped with a receiver 1 and a speaker 3 which output the received voice signal from the call partner, an amplifier 2 for the receiver which adjusts the voice level outputted from the receiver and an amplifier 4 for the speaker which adjusts the voice level outputted from the speaker, a sensor means 6 which detects the contact or noncontact state between the portable terminal and the ear of the speaking person and outputs an on or off signal, and a switching circuit 5 which outputs the voice signal from the call partner to the amplifier for the receiver or the amplifier for the speaker, and the switching circuit outputs the voice signal to the amplifier for the receiver when receiving the on signal from the sensor means and to the amplifier for the speaker when receiving the off signal.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an output switching of a portable terminal which can continue a conversation while listening to the voice of the other party, even when the terminal speaker of the portable terminal takes his / her ear off from the portable terminal during a call. It is related to the circuit.

[0002]

2. Description of the Related Art FIG. 4 is a block diagram showing a configuration of a conventional stationary communication terminal device (Japanese Patent Application Laid-Open No. 3-29234). In FIG. 1, a stationary communication terminal device 11 has a built-in microphone 12 to which the voice of the terminal speaker is input, an amplifier 13 for amplifying the voice of the other party, and a speaker 14 for outputting the amplified voice. I have.

[0003] The output of the microphone 12 is output by means 15 and 1
6 and is input to the amplifier 13. The voice of the other party is automatically adjusted by the amplifier 13 according to the voice level input from the microphone 12 and output from the speaker 14.

When the switch 17 for switching the control direction is set, the output of the switch 17 is sent through the means 18 to the means 1
6. In this case, the output level of the speaker 14 can be set in a direction opposite to the audio level input from the microphone 12.

[0005]

However, in the above-mentioned conventional stationary communication terminal device, the adjustment of the voice level of the other party in the amplifier 13 depends only on the voice level of the terminal speaker. If the speaker is silent, it switches to the speaker.

In a system in which the terminal speaker does not switch when the terminal speaker is silent and switches when the terminal speaker's voice level is lower than a certain level, the terminal speaker removes his / her ear from the terminal device and uses, for example, an LCD (liquid crystal display). In a state where the display information of the (display device) is being looked at silently, the switch does not switch, and a state occurs in which the voice of the other party cannot be heard even during a call.

The present invention has been made to solve such a conventional problem. Even when a terminal speaker removes his / her ear from a portable terminal during a call, the conversation is continued while listening to the voice of the call partner. It is an object of the present invention to provide an output switching circuit of a portable terminal capable of performing the above.

[0008]

SUMMARY OF THE INVENTION An output switching circuit of a portable terminal according to the present invention comprises a receiver and a speaker for outputting a received voice signal from a communication partner, and a receiver amplifier and a speaker for adjusting a voice level output from the receiver. Speaker amplifier that adjusts the audio level output from the speaker, sensor means for detecting a contact or non-contact state between the portable terminal and the ear of the speaker and outputting an ON signal or an OFF signal, and audio from the other party A switching circuit for outputting a signal to one of a receiver amplifier and a speaker amplifier, wherein the switching circuit outputs an audio signal to the receiver amplifier when receiving an ON signal from the sensor means, and outputs an audio signal when receiving an OFF signal. Is output to the speaker amplifier.

With this configuration, when the terminal speaker removes his / her ear from the portable terminal during a call, the voice signal from the other party is switched from the receiver to the speaker, and the terminal speaker looks at the LCD of the portable terminal. During that time, you can hear the voice from the other party, so you can continue the conversation.

Further, the output switching circuit of the portable terminal according to the present invention comprises a contact mechanism wherein the sensor means detects a contact or non-contact state between the portable terminal main body and the movable body with which the terminal speaker's ear abuts. It is.

With this configuration, when the terminal speaker removes his / her ear from the portable terminal during a call, the movable body separates from the portable terminal body and becomes in a non-contact state, so that an audio signal from the other party is transmitted from the receiver to the speaker side. Switching, the terminal speaker can hear the voice of the other party while looking at the LCD of the portable terminal, so that the conversation can be continued as it is.

[0012]

Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 is a block diagram showing an output switching circuit of a portable terminal according to an embodiment of the present invention. The audio output circuit of a portable terminal such as a portable telephone or a portable multifunctional terminal having a call function is shown in FIG. It is shown.

The output switching circuit comprises a receiver 1 for vibrating the eardrum of the terminal speaker's ear, a receiver amplifier 2 for adjusting the output level, a speaker 3 for directly emitting sound to space, and an output level for the speaker. , A switching circuit 5 for outputting an audio signal from the other party to one of the receiver 1 and the speaker 2, and detecting whether or not the ear of the terminal speaker is away from the portable terminal. It comprises a sensor 6 and a microcomputer 7 for switching the switching circuit 5 according to its state.

FIG. 2 is a configuration diagram showing an example of the sensor 6. The sensor 6 includes a portable terminal body 8, a movable body 9 slidably provided with respect to the portable terminal body 8, and a spring for holding the movable body 9 at a distance from the portable terminal body 8. 10 and other elastic members.
The receiver 1 is housed in the mobile terminal body 8 at the portion where the movable body 9 is installed.

When the terminal speaker tries to put his ear on the position of the receiver 1 of the portable terminal body 8, the movable body 9 comes into mechanical contact with the portable terminal body 8 against the spring 10. As a result, the contact 8s of the mobile terminal body 8 and the contact 9s of the movable body 9 which are installed facing each other come into contact, and the sensor 6 is turned on.
When the terminal speaker removes his / her ear from the portable terminal, the movable body 9 is separated from the portable terminal body 8 by the restoring force of the spring 10 and the sensor 6
Turns off.

Next, the operation of the output switching circuit when the portable terminal is in a talking state will be described with reference to the processing flow chart shown in FIG.

First, the state of the sensor 6 is checked (step S1). At this time, if the terminal speaker is talking on the portable terminal with the ear, the switching circuit 5 outputs the voice signal from the communication partner to the receiver 1 because the sensor 6 is on (step S2).

When the terminal speaker removes his / her ear from the portable terminal, the sensor 6 is turned off, and the switching circuit 5 outputs a voice signal from the other party to the speaker 3 (step S2). As a result, the terminal speaker can hear the voice of the other party from the speaker 3 while keeping his / her ear away from the portable terminal and looking at the display information on the LCD or the like, and can continue the conversation.

In the present embodiment, whether or not the terminal talker is listening to or detaching from the portable terminal is detected by the contact of the mechanical contact. However, the present invention is not limited to this. If you can tell if you have listened to your device,
For example, the present invention can be similarly implemented by using an optical sensor.

[0021]

As described above, according to the present invention, the voice signal from the other party is switched to the receiver side or the speaker side based on the ON / OFF of the sensor. Even if the user releases his / her ear, the voice of the other party can be heard from the speaker, and the output switching circuit of the portable terminal which can continue the conversation can be obtained.

[Brief description of the drawings]

FIG. 1 is a block diagram showing an output switching circuit of a portable terminal according to an embodiment of the present invention.

FIG. 2 is a configuration diagram showing an example of the sensor shown in FIG.

FIG. 3 is a processing flowchart illustrating the operation of the present invention.

FIG. 4 is a block diagram showing a configuration of a conventional stationary communication terminal device.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Receiver 2 Receiver amplifier 3 Speaker 4 Speaker amplifier 5 Switching circuit 6 Sensor 7 Microcomputer 8 Portable terminal body 8s Contact 9 Movable body 9s Contact 10 Spring

Claims (2)

[Claims] 1. A receiver and a speaker for outputting a received audio signal from a call partner, a receiver amplifier for adjusting an audio level output from the receiver, and a speaker amplifier for adjusting an audio level output from the speaker. Sensor means for detecting a contact or non-contact state between a portable terminal and a terminal speaker's ear and outputting an ON signal or an OFF signal; and an amplifier for the receiver or an amplifier for the speaker for outputting a voice signal from the other party A switching circuit that outputs the audio signal to the receiver amplifier when receiving an ON signal from the sensor unit, and outputs the audio signal to the speaker when receiving an OFF signal. An output switching circuit for a portable terminal, which outputs the signal to an amplifier. 2. The sensor according to claim 1, wherein said sensor means comprises a contact mechanism for detecting a contact or non-contact state between the portable terminal body and a movable body with which the terminal speaker's ear contacts. Output switching circuit for mobile terminals.