JP2000341022A - Portable telephone set - Google Patents

Abstract

PROBLEM TO BE SOLVED: To place a machine body in an effective standby state by making a self-standing stand of metal or an equivalent conductor operate as a 2nd antenna, and switching a 1st antenna to the 2nd antenna when detecting the 1st antenna being ineffective. SOLUTION: A stand part 7 is opened and arranged on a desk, a table, etc., and a portable telephone set main body 1 is placed in a standby state for communication. When a 1st antenna 5 is stored or detached, an antenna storage detection part 10 detects that situation, a stand opening/closing detection part 8 detects the stand part 7 being opened, and a detecting means by a control circuit 14 of a control part 3 detects the 1st antenna 5 not operating effectively. The control circuit 14 using a microprocessor, etc., switches an antenna switching circuit 9 to the 2nd antenna in the stand part 7 to secure an effective communication state of standby mode.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to portable telephones, including cordless telephones and mobile telephones, which are portable and provided with a stand for self-support.

[0002]

2. Description of the Related Art In recent years, portable telephones have been widely used with the improvement of convenience and economy. In addition, in a conventional mobile phone, it is often arranged on a desk or an equivalent when the mobile phone is not on the move, and in order to maintain the state of the best sensitivity, the antenna is separated from the desk or the desktop. In order to make the mobile phone as close to vertical as possible, various types of self-supporting stands are used as a self-supporting assisting device, so that a stable mobile phone can be easily realized.
The objective of stable standby reception has been achieved.

[0003]

However, in the conventional portable telephone provided with the above-mentioned stand for self-supporting, when the antenna is a retractable antenna or a detachable antenna, when the antenna is stored or the antenna is detached, the airframe is disturbed. Has often been a problem that the stand-alone stand cannot maintain the best standby state as originally intended.

In order to solve these problems, generally, an antenna attachment / detachment prevention mechanism is provided, or an antenna of a system in which the antenna effect is not significantly reduced even when the antenna is housed,
For example, countermeasures such as using a telescopic antenna have been taken.

In the above measures, the antenna must be replaced by a special means at the time of replacement of the antenna. In addition, in the case of the telescopic antenna, various methods and special circuits are used in order to prevent the antenna effect from being lowered by the telescopic state. Such as applying
In any case, there are problems such as inconvenience such as complicated and expensive in terms of cost, and the use of the antenna attachment / detachment prevention mechanism and the antenna effect maintaining antenna during expansion / contraction has been shunned. .

The present invention has been made in view of the above-mentioned conventional problems, and provides a portable telephone which can place an airframe effectively in a standby mode without using an antenna attachment / detachment preventing mechanism or an antenna effect maintaining antenna when telescopic. It is an object.

[0007]

In order to achieve the above object, the present invention comprises a stand for self-supporting, and the stand for self-sustaining is made of metal or equivalent conductor so that it can operate as a second antenna. Means for detecting that the self-supporting stand is opened and closed, and a circuit and means for switching between the first antenna and the second antenna, and a state of the first antenna by means for detecting a state of the first antenna. Is detected, and when it is detected that the first antenna is invalidated during storage or removal, the mobile phone is switched to the second antenna, and transmission and reception are performed effectively.

According to the present invention, the stand portion is opened and the first
The antenna can be used in the best surrounding environment, and when the first antenna is in an unexpected state, it can be compensated by automatically switching to the second antenna.

[0009]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The invention according to claim 1 of the present invention comprises a first antenna used for transmitting and receiving, an antenna state detecting means for detecting a state in which the first antenna is housed or removed, and An openable / closable stand for free standing having a configuration that acts as a second antenna with a conductor or a material containing a conductor for the purpose of enabling standby without lowering antenna sensitivity; a means for detecting opening and closing of the second antenna; An antenna switching circuit for switching between the antenna and the second antenna; a control circuit for controlling the antenna state detecting means, the means for detecting the opening and closing of the second antenna, and the antenna switching circuit; A mobile phone configured to be able to perform stable standby communication by detecting and switching to a second antenna by antenna state detecting means. , Since the state of the first antenna is constantly detected, the stand-alone stand having the second antenna is opened and closed, and the state in which the first antenna lacks an effective antenna effect or gain is detected and transmitted to the second antenna. And a sufficient communication state can be maintained even if the mobile phone is left as standby reception.

According to a second aspect of the present invention, in the portable telephone set of the first aspect, when switching to the first antenna or the second antenna, means for determining an electric field strength of an incoming reception signal; An antenna diversity means for switching to the first antenna or the second antenna in accordance with the determined result and switching to the antenna having the stronger electric field strength of the arriving received signal is provided, and the reception arriving at the first antenna is performed. If it is determined that the electric field strength of the signal is sufficient to maintain the reception quality, the second
In order to separate the reception by the antenna, the antenna switching circuit is kept as the first antenna, and when the signal received by the first antenna is reduced or deteriorated, the antenna is switched to the second antenna, so that good reception quality can be secured. It has a selective antenna diversity effect.

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

(Embodiment 1) FIG. 1 is a configuration diagram of a mobile phone according to a first embodiment of the present invention, and FIG. 2 is a perspective view for explaining a use state of the mobile phone.

In FIG. 1, reference numeral 1 denotes a portable telephone body;
A wireless communication unit 2 and a control unit 3 are provided. The wireless communication unit 2 includes a transmission / reception unit 4, a first antenna 5 that is telescopic and can perform wireless communication by itself, and a second antenna 6.
A stand unit 7 in which the second antenna 6 is disposed and which can be opened and closed, a stand open / close detector 8 for detecting opening and closing of the stand unit 7, and an antenna switching circuit for selecting the first antenna 5 and the second antenna 6 9 and an antenna storage detecting unit 10 capable of detecting the storage and expansion / contraction state of the first antenna 5.
1, a reception circuit 12, and a transmission / reception switching circuit 13. Further, the control unit 3 includes a control circuit 14
And an antenna switching control unit 15.
In addition, about the detailed part which does not need to specifically explain the present invention,
The description is omitted.

The operation of the mobile phone according to the first embodiment configured as described above will be described.

The portable telephone body 1 in the state shown in FIG.
As shown in FIG. 2B, when the stand unit 7 is opened and placed on a desk or a desk, and the mobile phone main body 1 is in a communication standby state, the first antenna 5 is almost vertical and separates from the desk surface. This can maximize the antenna effect or gain.

Here, if the first antenna 5 is stored or removed, this is determined by the antenna storage detecting unit 1.
0, the stand opening / closing detecting section 8 detects that the stand section 7 has been opened, and the detecting means of the control circuit 14 of the control section 3 detects that the first antenna 5 is not working effectively. . The control section 3 is generally constituted by a control circuit 14 using a microprocessor or the like. The control circuit 14 switches the antenna switching circuit 9 to the second antenna 6 in the stand section 7 so that the effective state at the time of standby can be obtained. Communication state can be secured.

(Embodiment 2) FIG. 3 is a configuration diagram of a mobile phone according to Embodiment 2 of the present invention.

The description of the internal configuration and operation of the same part of the wireless communication unit 2 in FIG. 2 as in the first embodiment will be omitted.

In order to determine the received electric field intensity level, the electric field intensity detecting section 16 has an electric field intensity judging means in the control section 3. An embodiment of the second embodiment configured as described above will be described below.

The feature of the second embodiment resides in that the control section 3 includes an electric field strength detection section 16. More specifically, the electric field intensity received by the first antenna 5 is detected by the electric field intensity detection unit 16, and when it is determined by the control circuit 14 that the electric field intensity is equal to or higher than the predetermined electric field intensity, the first
Switching to the antenna 5, the electric field intensity received by the second antenna 6 is similarly detected, and if it is judged by the control circuit 14 that the electric field intensity is equal to or higher than the predetermined electric field intensity, the second antenna 6 6 to perform a selective antenna diversity action.

Further, when the stand is closed as shown in FIG. 2A, the second antenna 6 mounted in the stand portion 7 is close to the portable telephone body 1. Therefore, antenna characteristics that are sufficiently satisfactory due to the influence of the metal part of the mobile phone main body 1 or the like, that is, matching, gain, and directivity of the antenna cannot be obtained.
By opening the stand portion 7 as shown in (b), the performance of the second antenna 6 is improved, and furthermore, the antenna is separated from the first antenna 5, so that the correlation with the first antenna 5 is reduced and a more effective antenna diversity effect is obtained. Can be expected.

In each of the above embodiments, the second antenna 6 is provided in the stand. However, the stand 7 may be formed of a conductor, and the stand 7 may have an antenna function. .

[0023]

As is apparent from the above description, according to the present invention, the stand which can be opened and closed is used as the second antenna, the stand can be opened and the first antenna can be used in the best surrounding environment. When the antenna is in an unexpected state, the state can be compensated for by automatically switching to the second antenna.

Also, the first antenna and the second antenna are switched according to the respective received electric field strengths, and the first antenna and the second antenna perform an antenna switching diversity operation. It also has the advantage of having features such as being able to secure.

[Brief description of the drawings]

FIG. 1 is a configuration diagram of a mobile phone according to a first embodiment of the present invention.

FIG. 2 is a perspective view for explaining a use state of the mobile phone.

FIG. 3 is a configuration diagram of a mobile phone according to a second embodiment of the present invention.

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 mobile phone main body 2 wireless communication unit 3 control unit 4 transmission / reception unit 5 first antenna 6 second antenna 7 stand unit 8 stand open / close detection unit 9 antenna switching circuit 10 antenna storage detection unit 11 transmission circuit 12 reception circuit 13 transmission / reception switching circuit 14 Control circuit 15 Antenna switching controller 16 Electric field strength detector

 ──────────────────────────────────────────────────続 き Continued on the front page F-term (reference) EE32 KK03

Claims (2)

[Claims] 1. A first antenna used for transmitting and receiving purposes, an antenna state detecting means for detecting a state in which the first antenna is stored or removed, and a conductor or a conductor for the purpose of enabling standby without reducing antenna sensitivity. A self-supporting stand which can be freely opened and closed and has a configuration which acts as a second antenna with a material containing a conductor, means for detecting opening and closing of the second antenna, an antenna switching circuit for switching between the first antenna and the second antenna, and the antenna A state detection unit, a unit for detecting opening / closing of the second antenna, and a control circuit for controlling an antenna switching circuit; in a state where the first antenna is stored or removed, the antenna state is detected by the antenna state detection unit;
A mobile phone, wherein the mobile phone is configured to switch to an antenna and perform stable standby communication. 2. A means for judging the electric field strength of an incoming received signal when switching to the first antenna or the second antenna, and switching to the first antenna or the second antenna according to the judgment result, and 2. The mobile phone according to claim 1, further comprising an antenna diversity means for switching to an antenna having a stronger electric field strength.