JP2002135200A - Portable telephone - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide portable telephone which prevents a call from shutting down with no antenna being extended, because a person making a call with the antenna of portable telephone still kept housed will not be aware of the lowering of the reception electric field level during the call. SOLUTION: The portable telephone is provide which comprises an expandable antenna, a detection circuit which detects whether the antenna has extended or contracted, a loud speaker, and a means for detecting the intensity of the reception electric field. A guidance is issued from a loud speaker which encouraged to extend the antenna, if the electric field value of the reception radio wave falls below a prescribed numerical value, for three states; call is coming in, call is being originated, and at call, with the antenna contracted. The loud speaker, which issues the guidance encouraging extension of the antenna, is provided to issue an incoming call sound, being different from one for sounding the voice received during the call.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a portable telephone,
In particular, the present invention relates to a mobile phone that issues guidance for prompting extension of an antenna.

[0002]

2. Description of the Related Art In recent years, most users of portable telephones have a telephone conversation with an antenna stored. Even if the received electric field level is lowered during a call, the user may not notice the call and may end the call without extending the antenna.

[0003] Conventionally, a device that generates a ringing tone of a cellular phone having received an incoming call by a buzzer has recently been replaced by a speaker because the melody of the incoming melody has been advanced. With this change, it became possible to use voice guidance that could not be achieved with a buzzer by using speakers.

[0004]

On the other hand, the electric field strength received by the portable telephone is usually notified to the user by displaying a predetermined display on the LCD display unit. Generally, the level of the received electric field is higher when the antenna is extended than when it is retracted. Further, when a call is being made with the ear in contact, the reception characteristics of the antenna change due to the influence of the head and hands of the human body, and the received electric field generally decreases. That is, LCD
There is a case where the electric field strength during the telephone conversation with the ear is lower than the electric field strength confirmed by looking at the display. This effect is more pronounced when the antenna is retracted than when it is extended.

However, it is impossible to know the electric field strength display on the LCD display unit while talking with the portable telephone placed on the ear. Some mobile phones can emit a "warning sound" along with the received voice, but the sound is low and difficult to hear in busy traffic. This is because the level of the "warning sound" is set low so as not to disturb the voice of the call and not to give a shock to the ear.

SUMMARY OF THE INVENTION An object of the present invention is to provide a portable telephone which prevents a person who talks with the antenna stored therein from noticing even if the received electric field level is lowered during the call and without having to extend the antenna. To provide.

[0007]

A portable telephone according to the present invention comprises:
A state in which the antenna is housed in a mobile phone having at least one telescopic antenna, a detection circuit for detecting whether the antenna is in an extended state or a housed state, a speaker, and a unit for detecting the strength of a received electric field. And while receiving a call,
When the electric field value of the received radio wave is lower than a predetermined numerical value in the three states of calling and talking, the speaker prompts the user to extend the antenna.

[0008] Further, a speaker for issuing guidance for prompting the user to extend the antenna is provided for generating a ringtone, and is provided separately from a speaker for generating a received voice during a call. .

Further, the guidance for prompting the user to extend the antenna is obtained by decoding a previously recorded human voice using ADPCM.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, embodiments of the present invention will be described in detail with reference to the drawings. FIG. 1 is a block diagram showing the configuration of the embodiment of the present invention.

According to FIG. 1, the present embodiment comprises a telescopic antenna 1, a detecting structure 2 for detecting whether the antenna is in an extended state or a stowed state, a radio unit 3 for demodulating a received radio wave, and a demodulated electric field level. And a detection circuit 5 for detecting the expansion / contraction state of the antenna 1 from the detection structure 2.
And a CPU 6 for comparing the control unit 4 with a preset numerical value based on the state of the detection circuit 5, a ROM 7 for storing voice guidance in advance, and an AD for voice guidance.
It comprises a PCM decoder 8, a D / A converter 9 for converting into an audio signal, and a speaker 10. The detection circuit 5 detects whether the antenna 1 is in the extended state or the housed state through the state of the detection structure 2.

One embodiment of the structure of the detection structure 2 will be described with reference to FIG. The tip of the antenna 1 has a metal part 11 made of metal. The metal part 11 is a metal leaf spring 2
In order to make contact with No. 1, the metal is used for the purpose of adjusting the composition. If there is no problem in strength or the like, it is not necessary to use metal. A leaf spring 21 is mounted on the substrate 31 of the wireless unit 3 with one end fixed on the substrate 31 and the other end suspended in the air. A micro switch 22 is provided between the leaf spring 21 and the wireless board 31, and the antenna 1
When the leaf spring 21 is stored, the micro switch 22
Is pressed down (makes up). (When the antenna 1 is in the extended state, the micro switch 22
Is turned off. ) The micro switch 22 is connected to the detection circuit 5. 2A and 2B show the substrate 31 viewed from the side, and FIGS. 2C and 2D show the substrate 31.
Is viewed from directly above.

Another embodiment of the detection structure 2 will be described with reference to FIG. The tip of the antenna 1 has a metal portion 11 formed of a conductive metal plate. Two leaf springs 23 and 24 are mounted on the board 31 of the wireless unit 3 in a direction perpendicular to the board 31. Further, the springs 23 and 24 do not contact each other when the antenna is extended, and have a distance that allows electrical conduction through the antenna 1 only when the antenna 1 is stored. 3A and 3B show the substrate 31 viewed from directly above, and FIGS. 3C and 3D show the substrate 31 viewed from the side. The speaker 10 is provided for notifying the incoming call, and a device for listening to the call voice is provided separately.

Next, the operation of the embodiment will be described with reference to FIG. The radio wave input from the antenna 1 is demodulated by the radio unit 3, and the received electric field level at that time is extracted as an analog DC voltage (RSSI signal: DC voltage proportional to the received electric field strength). The RSSI signal is A / D converted by the control unit 4 and then input to the CPU 6. Also, antenna 1
Is detected by the detection circuit 5 via the detection structure 2 as to whether or not is stored or in the extended state, and the result is input to the CPU 6.

Thereafter, a predetermined reception electric field level A
The CPU 6 compares [dBu] with the actually received electric field level (RSSI signal). The CPU 6 determines that the comparison determination result indicates that the actually received electric field level <A [dBu]
If (FIG. 4: STEP 1) and it is detected that the antenna 1 is in the housed state (FIG. 4: Step 2), R
Guidance voice data (for example, “extend the antenna”) preset in the OM 7 is called, and is converted into voice by the D / A conversion circuit 9 through the decoder 8 of the ADPCM, and then the guidance is transmitted from the speaker 10. ("Please extend the antenna") flows (Figure 4:
Step 3).

The operation of the detection structure 2 will be described with reference to FIGS. FIG. 2 detects the stored state using the leaf spring 21 and the microswitch 22. When the antenna 1 is retracted, the tip 11 of the antenna 1 pushes down the leaf spring 21,
The protruding part of the micro switch 22 is pushed down (the switch makes up). When the antenna 1 is in the extended state, the protrusion of the microswitch 22 is in a state of being pushed up (the switch is not made). The CPU 6 recognizes the state of the microswitch 22 via the detection circuit 5, and recognizes the state of the antenna 1.

FIG. 3 detects the stored state by using leaf springs 23 and 24 which are vertically mounted on the radio section substrate 31. Both leaf springs 23 and 24 have conductivity. The metal of the tip 11 of the antenna 1 also has conductivity. When the antenna 1 is retracted, the distal end portion 11
The leaf springs 23 and 24 are in a state where they can be energized via the distal end portion 11. On the other hand, when the antenna 1 is in the extended state, the leaf springs 23 and 24 are in an insulated state. The CPU 6 recognizes this binary state via the detection circuit 5,
The state of the antenna 1 is recognized.

The operation of the present invention is as follows.
Although there are three states of calling and talking, the condition is not limited to this. It does not matter whether the mobile phone is only receiving a call, only calling, or only talking. Also, any two combinations may be used.

Although the numerical value A [dBu] of the predetermined electric field level is a predetermined numerical value, it can be set by a user.

It is also possible to set the value of A separately in each state of receiving, calling, and talking. That is,
The value “A1” of A during a call is the value “A2” during a call / call
It is desirable to make it larger. (Because the mobile phone is affected by the human hand or head during a call or during a call, the received electric field level is lower than during a call.) Outgoing /
The value “A2” during a call is 80% of the value “A1” of the incoming A
A degree is desirable.

Although the guidance voice is described as "Please extend the antenna", the present invention is not limited to this.

Although the RSSI voltage is used to detect the received electric field, other means may be used as long as it detects the received electric field level.

Further, the detection structure 2 is provided on the substrate of the radio unit 3, but is not limited thereto, and may be provided on the substrate of the control unit 4.

[0024]

According to the present invention, when the antenna 1 is housed and the reception electric field level becomes lower and falls below a predetermined A [dBu], the speaker provides the guidance for extending the antenna. , The user can know the deterioration of the electric field without looking at the LCD display, and can maintain a stable communication state.

Further, since the guidance can be uttered with a relatively loud sound from a speaker provided separately from the device for listening to the call voice, the guidance can be sufficiently noticed even in busy traffic. With the conventional “warning sound”, it may not be possible to understand what is being warned, and it is very effective to play voice guidance.

This guidance is given not only during a call but also during a call (during a call / during a call) before entering the call.

[Brief description of the drawings]

FIG. 1 is a block diagram showing a configuration of an embodiment of the present invention.

FIG. 2 is a block diagram illustrating an example of a detection structure according to the present embodiment.

FIG. 3 is a block diagram showing another example of the detection structure of the present embodiment.

FIG. 4 is a flowchart illustrating the operation of the present embodiment.

[Explanation of symbols]

 Reference Signs List 1 antenna 2 detection structure 3 radio section 4 control section 5 detection circuit 6 CPU 7 ROM 8 ADPCM decoder 9 D / A converter 10 speaker 11 metal section 21 leaf spring 22 micro switch 23, 24 spring 31 substrate

──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. ⁷ Identification symbol FI theme coat ゛ (Reference) H04M 1/725 H04B 7/26 BF term (Reference) 5J047 AA01 AA04 AB06 FD01 5K023 AA07 BB02 BB12 LL05 5K027 AA11 BB03 FF01 FF28 5K067 AA01 AA33 BB04 DD23 EE02 FF02 FF25 FF40 HH01 HH22 HH23 KK01

Claims (6)

[Claims] 1. A mobile phone comprising at least one telescopic antenna, a detection circuit for detecting whether the antenna is in an extended state or a stored state, a speaker, and means for detecting the intensity of a received electric field. When the electric field value of the received radio wave is lower than a predetermined value in the three states of receiving, transmitting, and talking in a state in which the antenna is stored, the user is prompted to extend the antenna. A mobile phone that emits guidance from a speaker. 2. A speaker for generating guidance for prompting the user to extend the antenna is provided for generating a ringtone, and is provided separately from the one for generating a received voice during a call. The mobile phone according to claim 1. 3. The mobile phone according to claim 1, wherein the guidance prompting the user to extend the antenna is obtained by decoding a human voice recorded in advance using ADPCM. 4. A state in which the antenna is housed, and
The mobile phone according to claim 1, wherein the three states during a call, during a call, and during a call are two states during a call and during a call. 5. The mobile phone according to claim 1, wherein the predetermined numerical value to be compared with the electric field value of the received radio wave is a predetermined numerical value set by arbitrarily configurable setting means. 6. A predetermined numerical value to be compared with the electric field value of the received radio wave is a predetermined numerical value which is different between two states, that is, incoming call, outgoing call, and talking, and that the numerical value during outgoing call and talking is incoming. 80% of the value of
The mobile phone according to claim 1.