JP2001045146A - Communication terminal device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain a communication terminal device reducing power consumption by making a displaying part an inactive state as soon as possible just after starting speech communication by detecting the sound pressure level of a voice signal and interrupting power supply when the detected sound pressure level surpasses a prescribed value. SOLUTION: Voice outputted by a speaker is collected by a microphone 103 and converted from an analog signal into a digital signal by an AD converter 105. The digital signal outputted by the converter 105 is inputted to a sound pressure detecting part 107, the part 107 decides that the speaker performs communication without looking at a displaying part when the signal surpasses a certain fixed level, a power supply 109 for the displaying part is controlled so as to be an inactive state, and power supply to a back light 101 and the displaying part 102 is interrupted. Thus, it is possible to interrupt power supply to the part 102 just after starting speech communication and to reduce power consumption.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a communication terminal device, and more particularly to a communication terminal device for controlling power supply to a display unit and a display control method therefor.

[0002]

2. Description of the Related Art In a communication terminal device such as a mobile phone or a PHS, it is impossible for a user to see a display portion of the device main body during a call, so that the display portion (for example, a liquid crystal screen) is displayed during a call. There is a need to reduce power consumption without supplying power, that is, in a non-operating state.

In particular, in recent communication terminal devices, it is common that a backlight is attached to the display unit so that the display unit can be checked even in a dark place, and the power consumption of the display unit is large. Tend to be.

[0004] Therefore, there have been proposed some methods of detecting that a call has been started in some way, and then shutting off the power supply to the display unit after the detection.

For example, Japanese Patent Application Laid-Open No. 7-307776 discloses a control method in which it is determined that a telephone call is in progress based on the inclination of a communication terminal device detected by a gyro, and power to a backlight of a display unit is cut off. Has been proposed.

In Japanese Patent Application Laid-Open No. Hei 10-190786, a communication terminal device is grasped with a hand and a touch sensor detects that the communication terminal device has come into contact with an ear, so that it is determined that a call is in progress. A control method of shutting off power to the backlight has been proposed.

Further, in Japanese Patent Application Laid-Open No. Hei 10-242896, a timer is operated by a main control unit after a call is started, and after a predetermined time has elapsed, the backlight power is turned off.
Is adopted.

[0008]

However, in the conventional communication terminal device, the call is not started when the fixed time is measured by the timer, or when the reference value which is the basis for executing the cutoff by the gyro or the touch sensor is detected. Since it takes a certain period of time from when the power supply to the display unit is cut off, it is not possible to put the display unit into the non-operation state immediately after the start of a call, and during that certain period of time, power is wasted on the display unit. become.

SUMMARY OF THE INVENTION The present invention has been made in view of the above, and an object of the present invention is to provide a communication terminal device in which power consumption is reduced by bringing a display unit into a non-operation state as soon as possible after a call is started.

[0010]

According to the present invention, there is provided a communication terminal apparatus comprising: display means for displaying predetermined character information; and sound pressure detecting means for receiving a sound signal and detecting a sound pressure level of the received sound signal. And power supply control means for interrupting power supply to the display means when the sound pressure level detected by the sound pressure detection means exceeds a predetermined value.

According to the present invention, the start of a call is detected based on the sound pressure level of an audio signal captured by a microphone, so that power supply to a display unit can be cut off immediately after the start of a call, thereby reducing power consumption. can do.

A communication terminal apparatus according to the present invention captures an audio signal, a display means for displaying predetermined character information, compares the captured audio signal with a predetermined audio signal held in advance, and determines whether both signals are present. A voice recognition unit that determines that a predetermined voice has been input if they match, and an electric power that cuts off power supply to the display unit when the voice recognition unit detects that a predetermined voice signal has been input. Supply control means.

According to the present invention, the start of a call is detected based on whether or not the audio signal captured by the microphone is a predetermined audio signal. Therefore, power supply to the display unit can be cut off immediately after the start of the call. Power consumption can be reduced.

[0014] In the communication terminal device according to the present invention, the power supply control means may include a detection unit for detecting connection of the earphone, and the power supply control unit may detect the connection of the earphone when the detection unit detects that the earphone is connected. And a stop instruction unit for causing the unit to be in a non-operation state.

According to the present invention, when an earphone is worn, a user who uses a communication terminal using the earphone to prevent power supply to the display unit from being interrupted even during a call. Can see the display during a call.

The communication terminal device according to the present invention has a display power supply independent of a main power supply for supplying power to the entire device, and supplies power only to the display means. The power supply to the display means is cut off by disabling the display power supply.

According to the present invention, a power supply for the display unit is provided separately from the main power supply, and the power supply to the display unit is cut off by disabling the power supply for the display unit. There is no need to control the processing, and it is possible to realize that only the display unit is brought into the non-operation state with simpler control.

In the communication terminal device according to the present invention, the power supply control means includes: a call instruction detecting unit for detecting an opening instruction and an end instruction from the caller; And a stop instruction unit that causes the power supply control unit to be in a non-operating state from a time when the talk instruction is detected to a time when a talk start instruction from the caller is detected.

According to the present invention, the power supply control to the display unit is not performed after the end of the call until the start of the next call. Can be prevented.

The communication terminal device according to the present invention employs a configuration in which the power supply control means supplies power to the display means again by a call termination operation.

According to the present invention, it is possible to supply power to the display means (including the backlight) again only by a normal end operation. Therefore, a key operation for resupplying power to the display means is not required.

A base station apparatus according to the present invention performs wireless communication with any of the above communication terminal apparatuses.

According to the present invention, since the battery of the communication terminal device has a long life, the convenience of the user is improved.

According to the display control method of the present invention, an audio signal is fetched, the sound pressure level of the fetched audio signal is detected, and when the detected sound pressure level exceeds a predetermined value, the display of character information is stopped.

According to the present invention, the start of a call is detected based on the sound pressure level of an audio signal captured by a microphone, so that power supply to the display unit can be cut off immediately after the start of a call, thereby reducing power consumption. can do.

According to the display control method of the present invention, an audio signal is fetched, the fetched audio signal is compared with a predetermined audio signal held in advance, and when it is detected that the predetermined audio signal has been input, Stop displaying text information.

According to the present invention, the start of a call is detected based on whether or not the audio signal captured by the microphone is a predetermined audio signal. Therefore, power supply to the display unit can be cut off immediately after the start of the call. Power consumption can be reduced.

The display control method according to the present invention detects the connection of the earphone and does not stop the display of the character information while the connection of the earphone is detected.

According to the present invention, when an earphone is worn, a user who uses a communication terminal using the earphone in order not to interrupt power supply to the display unit even during a call. Can see the display during a call.

The display control method according to the present invention detects an opening instruction and an end instruction from a caller, and detects an opening instruction from the caller when the end instruction is detected from the caller. Until the time, the character information display is not stopped.

According to the present invention, since the power supply control to the display unit is not performed after the end of the telephone call until the start of the next telephone call, the display unit becomes inactive by the voice which happens to be taken in the non-communication. Can be prevented.

[0032]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The gist of the present invention is to supply electric power to the display unit when the sound pressure level of a fetched audio signal reaches a predetermined value or when a predetermined audio signal is fetched. It is to cut off.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings.

(Embodiment 1) The communication terminal device according to the present embodiment detects the start of a call based on the sound pressure level of the sound taken by the microphone.

Hereinafter, the communication terminal apparatus according to the present embodiment will be described with reference to FIG. FIG. 1 is a main block diagram showing a schematic configuration of a communication terminal apparatus according to Embodiment 1 of the present invention.

The backlight 101 turns on the display unit 102, and the display unit 102 displays, for example, character information such as a remaining battery level, a clock, an electric field level, and a message. Microphone 1
Reference numeral 03 denotes an external signal collected and converted into an analog signal, and the converted signal is output to the AD converter 105. Speaker 1
Reference numeral 04 outputs the analog signal sent from the DA converter 106 to the outside of the apparatus as an audio signal.

The AD converter 105 converts an analog signal input from the microphone 103 into a digital signal.
The DA converter 106 converts a digital signal sent from the audio processing unit into an analog signal.

The sound pressure detecting unit 107 is provided with the AD converter 10
5, a sound pressure level is detected from the digital signal input from the control unit 5, and the detected sound pressure level is notified to the display unit power supply 109.
Supplies power to components other than the backlight 101 and the display unit 102, and the display unit power supply 109 supplies power to the backlight 101 and the display unit 102.

The audio processing unit 110 includes the AD converter 10
5 is compressed and output as compressed audio data to the data storage unit 112. The compressed audio data output from the data storage unit 112 is decompressed and output to the DA converter 106. The main control unit 111 controls the system of the communication terminal device, and the data storage unit 112 stores the data output from the audio processing unit 110 or the data output from the wireless processing unit 114.

The key input unit 113 transmits operation information to the main control unit 111 when the caller operates the key input unit 113, and the wireless processing unit 114 transmits and receives radio waves to and from the base station in a predetermined frequency band. It has a base hand function for converting data into a desired digital signal or converting a desired digital signal into an analog signal.

Next, the operation of the communication terminal having the above configuration will be described.

The caller enters the key input unit 11 when making or receiving a call.
The user presses a call key in No. 3 and presses a telephone number or receives an incoming call, and starts talking by bringing his / her mouth close to the communication terminal device. At this time, the voice generated by the caller is collected by the microphone 103, and is converted from an analog signal to a digital signal by the AD converter 105.

The digital signal output from the AD converter 105 is input to a sound pressure detecting section 107. When this signal exceeds a certain level (threshold), the caller talks without looking at the display section. The display unit power supply 109 is controlled to be in a non-operation state by the sound pressure detection unit 107, and the backlight 101 and the display unit 102
The power supply to is shut off.

When the call ends, the caller enters the key input unit 1
Press the end key 13 to disconnect the line. The sound pressure detection unit 107 is in a non-operation state after the end key is pressed until the next call key is pressed.

As described above, according to the present embodiment, since the start of a call is detected based on the sound pressure level of the audio signal captured by the microphone, power supply to the display unit can be cut off immediately after the start of the call. Power consumption can be reduced.

In the actual circuit, the sound pressure detector 1
07 can be realized by the same LSI as the audio processing unit 110 that performs audio compression and decompression, so that the hardware scale does not increase as the sound pressure detection unit 107 is added.

(Embodiment 2) The apparatus according to the present embodiment has the same configuration as that of Embodiment 1, except that the start of a call is detected depending on whether or not a predetermined audio signal is captured. is there.

Hereinafter, the communication terminal apparatus according to the present embodiment will be described with reference to FIG. FIG. 2 is a main block diagram showing a schematic configuration of a communication terminal apparatus according to Embodiment 2 of the present invention. The same components as those in the first embodiment are denoted by the same reference numerals, and detailed description is omitted.

The voice recognition unit 201 previously holds a voice signal corresponding to a predetermined voice (for example, “hello”),
The sound signal collected by the microphone 103 is compared with the held sound signal, and if they match, it is determined that the call has been started, and the main control unit 111 is notified of the fact.

When the voice recognition unit 201 detects that a predetermined voice is captured by the microphone 103,
When it is determined that the caller is talking without looking at the display unit, the display unit power supply 109 is controlled to be in the non-operation state, and the power supply to the backlight 101 and the display unit 102 is cut off. .

As described above, according to the present embodiment, the start of a call is detected based on whether or not the audio signal captured by the microphone is a predetermined audio signal. Supply can be cut off, and power consumption can be reduced.

In the actual circuit, the speech recognition unit 2
01 can be realized only by adding a voice recognition function to a conventional communication terminal device, so that the hardware scale does not greatly increase.

(Embodiment 3) The communication terminal apparatus according to the present embodiment has a configuration similar to that of Embodiment 1, except that when an earphone is connected, power supply control to the display unit is controlled. It is not to be done.

In recent years, an increasing number of people use earphones, especially earphones with microphones for convenience, attached to communication terminals. When an earphone is used, it is not necessary to position the communication terminal near the ear on the side of the head during a call, so that the caller can see the display unit during the call.

Therefore, in the present embodiment, when the earphone is worn, the power supply to the display unit is not interrupted even during a call.

Hereinafter, the communication terminal apparatus according to the present embodiment will be described with reference to FIG. FIG. 3 is a main part block diagram showing a schematic configuration of a communication terminal apparatus according to Embodiment 3 of the present invention. The same components as those in the first embodiment are denoted by the same reference numerals, and detailed description is omitted.

The earphone 301 with a microphone is the socket 30
2, the instruction signal from the sound pressure detection unit 107 to the display unit power supply 109 is cut off by the logic element 303, and the display unit power supply 109 is not operated even if the sound pressure level exceeds a predetermined value. No state.

As described above, according to the present embodiment, when an earphone is attached, communication is performed using the earphone so as not to cut off power supply to the display unit even during a call. The user using the terminal can see the display unit during a call.

In the first to third embodiments, the user of the communication terminal device always presses the end key in the key input unit 113 when the other party ends the call or when the user ends the call. The main control unit 111 detects that the end key is pressed, performs end control on the wireless processing unit 114, sends a power supply instruction to the display unit power supply 109, and Power is supplied to the light 101 and the display unit 102 again.

By performing such control, the backlight 101 and the display unit 10 can be operated only by a normal end operation.
2 can be supplied with power again. Therefore, a key operation for re-supplying power to the backlight 101 and the display unit 102 becomes unnecessary.

It should be noted that the first to third embodiments are described.
, The first embodiment and the second embodiment can be used in combination. Further, in the third embodiment, the display control method when the earphone is not attached is arbitrary, and in the third embodiment, the case where the sound pressure level detection shown in the first embodiment is used has been described. The effect of the present invention can be obtained by using the voice recognition shown in (1) or by using sound pressure level detection and voice recognition together.

[0062]

As described above, according to the present invention,
When the sound pressure level of the fetched audio signal reaches a predetermined value or when a predetermined audio signal is fetched, power supply to the display unit is cut off, so that power consumption can be reduced.

[Brief description of the drawings]

FIG. 1 is a main block diagram showing a schematic configuration of a communication terminal apparatus according to Embodiment 1 of the present invention.

FIG. 2 is a main block diagram showing a schematic configuration of a communication terminal apparatus according to Embodiment 2 of the present invention.

FIG. 3 is a main block diagram showing a schematic configuration of a communication terminal apparatus according to Embodiment 3 of the present invention.

[Explanation of symbols]

 Reference Signs List 101 backlight 102 display unit 107 sound pressure detection unit 109 power supply for display unit 201 voice recognition unit 303 logic element

Continued on the front page (72) Inventor Takanori Tetsuda 2-45, Hikosancho, Kanazawa-shi, Ishikawa Pref. F-term in Matsushita Communication Kanazawa Research Laboratories Co., Ltd. EE02 FF02 FF13 FF23 FF25 FF31 FF32 KK05

Claims (11)

[Claims] A display means for displaying predetermined character information;
A sound pressure detecting means for fetching a sound signal and detecting a sound pressure level of the fetched sound signal; and supplying power to the display means when the sound pressure level detected by the sound pressure detecting means exceeds a predetermined value. Power supply control means for shutting off
A communication terminal device comprising: 2. Display means for displaying predetermined character information;
A voice recognition unit that captures a voice signal, compares the captured voice signal with a predetermined voice signal held in advance, and determines that a predetermined voice has been input if these two signals match; And a power supply control unit that shuts off power supply to the display unit when it is detected that a predetermined audio signal has been input by the communication terminal device. 3. The power supply control unit includes: a detection unit that detects connection of an earphone; and when the detection unit detects that the earphone is connected, the power supply control unit disables the power supply control unit. The communication terminal device according to claim 1, further comprising a stop instruction unit. 4. A display power supply independent of a main power supply for supplying power to the entire apparatus and supplying power only to the display means, wherein the power supply control means sets the display power supply to a non-operating state. The power supply to the display means is interrupted by setting the power supply to the display means.
The communication terminal device according to any one of the above. 5. The power supply control means includes: a call instruction detecting unit for detecting an open instruction and a call end instruction from a caller; and a power supply control unit when a call end instruction from the caller is detected by the call instruction detecting unit. And a stop instruction unit for causing the power supply control unit to be in a non-operation state until a time when a talk opening instruction from a caller is detected. A communication terminal device according to claim 1. 6. The communication terminal device according to claim 1, wherein the power supply control unit supplies power to the display unit again by a call termination operation. 7. A base station apparatus for performing wireless communication with the communication terminal apparatus according to any one of claims 1 to 6. 8. A display control method comprising: fetching an audio signal; detecting a sound pressure level of the fetched audio signal; and stopping display of character information when the detected sound pressure level exceeds a predetermined value. Method. 9. A method for capturing an audio signal, comparing the captured audio signal with a predetermined audio signal held in advance, and stopping the display of character information when it is detected that the predetermined audio signal has been input. The display control method characterized by the above-mentioned. 10. The apparatus according to claim 8, wherein the connection of the earphone is detected, and the display of the character information is not stopped while the connection of the earphone is detected.
Display control method described. 11. An open-talk instruction and an end-talk instruction from a caller are detected, and characters are transmitted from the time when the end-of-talk instruction is detected until the time when an open-talk instruction from the caller is detected. The display control method according to any one of claims 8 to 10, wherein the information display is not stopped.