JPH04249433A - Portable telephone - Google Patents

Abstract

PURPOSE:To upgrade speech quality of a portable telephone by sending and receiving speech by a corresponding transmitter or receiver in accordance with the condition whether or not the detecting output of a detecting means is set to an extension device. CONSTITUTION:A processing circuit 113 uses transmitting circuits 114 and 115 to superimposes a command signal on a voice signal 116, and uses receiving circuits 117 and 118 to separate the command signal from the transmitted signal. Further, a detecting circuit 122 is installed to detect whether or not the output of a means 122 is set in an extension apparatus installed in a car to control switch circuits 102 and 103. Here, if the output of the means 122 is not set in the detecting output extension apparatus, a voice signal from a transmitter and a command signal to a base station are supplied to circuits 114 and 115 through the switch circuit 102. Furthermore, if the output of means 122 is set in the extension apparatus, the circuit 102 is transmitted to another telephone set through a switch transmission circuit ST via a connector 131. Besides, the circuit 102 can be switched to circuit 103 to receive a plurality of signals to upgrade speech quality.

Description

[Detailed description of the invention]

0001

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a mobile phone that can be used from inside a vehicle.

0002

2. Description of the Related Art For example, small zone type mobile phones, that is, so-called cellular system mobile phones, can be used while moving.

0003

[Problem to be Solved by the Invention] However, when a normal mobile phone is used inside a vehicle such as a car, train, or airplane, the radio waves are attenuated by the vehicle body, resulting in a drop in call quality or the inability to make a call. I end up doing something like that. In this case, if the transmission output of the mobile phone is increased, the quality of the call when receiving the call from the other party can be ensured, but the consumption of the battery that is the power source of the mobile phone will increase, and the time that can be used for the call will be shortened. Furthermore, even if the transmitting power of the mobile phone is increased, the quality of the call received by the user cannot be improved.

Furthermore, when a mobile phone is used from a vehicle moving at high speed, the mobile phone requires a high-performance reception circuit that takes into account Doppler effects, fading, delay control, and the like. However, because general mobile phones are not equipped with such high-performance receiving circuits due to their size and weight, their movement speed is limited to about 10 km/h.

[0005] For this reason, in the case of a private car, even if the user owns a mobile phone, it is necessary to install a car phone separately from the mobile phone. And in this case,
It is necessary to contract with a telephone company for both the mobile phone and the car phone.

Furthermore, when using a mobile phone on an aircraft, in addition to the above-mentioned problems, there are restrictions on the use of radio equipment. Furthermore, when the voltage of a power supply battery drops, the battery needs to be charged or replaced, and it is also necessary to carry a charger or a spare battery.

The present invention attempts to solve these problems.

[0008]

[Means for Solving the Problems] Therefore, in the present invention, if the reference numerals of each part correspond to the embodiments described later, the transmitter 111, an audio signal, and a command signal to a base station are converted into a transmission signal. Transmission circuits 114 and 115 for conversion, reception circuits 117 and 118 for extracting audio signals and command signals from the base station from signals transmitted from the base station, receiver 112, connector 131, and an extension provided in a vehicle or the like. A detection means 122 for detecting whether or not the device 2 is set, and first and second switch circuits 102 and 10 that are controlled based on the detection output of this detection means 122.
3, and when the detection output of the detection means 122 indicates that the expansion device 2 is not set, the own voice signal from the transmitter 111 and the command signal to the base station are sent to the first switch. Transmitting circuit 11 through circuit 102
4, 115 and transmits it to the base station, and the other party's audio signal from the receiving circuits 117, 118 is supplied to the handset 112 through the second switch circuit 103, and the detection output of the detection means 122 is transmitted to the extension device 2. , the transmission circuit 214 of the expansion device 2 transmits the own voice signal from another transmitter 311 and the command signal to the base station through the first switch circuit 102 and the connector 131. . It is something.

[0009]

[Function] When used alone, it operates as a normal mobile phone, and when set in an expansion device, it operates as a mobile phone such as a car phone in cooperation with the transmission circuit and reception circuit of the expansion device.

0010

DESCRIPTION OF THE PREFERRED EMBODIMENTS In FIGS. 1 and 2, 1 is a mobile phone, 2 is an expansion device, and 3 is an expansion headset.

[0011] In the mobile phone 1, 100 is a system controller, which controls each section described below to control the overall operation of the mobile phone 1 and expansion device 2. For this reason, this system controller 100
It is composed of a microcomputer and accesses necessary control signals and data between each part.

[0012] Also, 111 is a transmitter, 112 is a receiver,
113 is an audio data processing circuit. This processing circuit 11
3 superimposes the command signal required between the base station and the mobile phone 1 on the baseband audio signal transmitted to the base station, and also superimposes the command signal required between the base station and the mobile phone 1 on the baseband audio signal transmitted from the base station. It performs processes such as separating and extracting command signals.

Furthermore, 114 is a modulation circuit, 115 is a power amplifier for transmission, 116 is a transmitting/receiving antenna, 117 is a tuner circuit, and 118 is a demodulating circuit. The tuner circuit 117 includes from a high frequency amplifier to an intermediate frequency amplifier, and converts the transmission signal (modulated signal) from the base station into an intermediate frequency signal and outputs it.
Reference numeral 8 demodulates a baseband audio signal (including a command signal) from the intermediate frequency signal. Also, 12
1 is a key such as a dial key and a call key, and 122 is a switch. This switch 122 is for detecting when the mobile phone 1 is connected to the expansion device 2, and its detection output is supplied to the system controller 100. Furthermore, 131 is a connector, and this connector 13
1, this mobile phone 1 is connected to an expansion device 2.

The expansion device 2 is installed in a vehicle, for example a private car (not shown), and when the mobile phone 1 is inserted into a slot on the dashboard of the private car, the connector 131 is connected to the connector of the expansion device 2. 231. Furthermore, this expansion device 2 includes a modulation circuit 114, an amplifier 115, and an antenna 1 of the mobile phone 1.
16, a modulation circuit 214 similar to the tuner circuit 117 and demodulation circuit 118, an amplifier 215, an antenna 216, a tuner circuit 217, and a demodulation circuit 218. however,
In this case, the amplifier 215 has sufficient transmission power, and the antenna 216 is provided outside the vehicle. Further, the tuner circuit 217 is designed to take into account reception characteristics that take into account high-speed movement, ie, Doppler effect, fading, delay control, and the like.

Furthermore, in the expansion device 2, 241 is a light-receiving element, such as a phototransistor, which receives infrared light LT to be described later and converts it into a signal FT, and 242 is the signal FT.
a demodulation circuit that demodulates a baseband audio signal ST from
243 is a modulation circuit that converts the baseband audio signal SR into a predetermined FM signal FR, and 244 is an infrared LED that converts the FM signal FR into infrared light LR and outputs it.

The headset 3 is a handset for expansion when the mobile phone 1 is used as a car phone, and has a transmitter 311 and a receiver 312.
A light receiving element 341 and a demodulating circuit 342 similar to the light receiving element 241, demodulating circuit 242, modulating circuit 243, and LED 244
, a modulation circuit 343 and an LED 344. In this case, the light receiving element 341 and the LED 344 are
This is for accessing infrared light LR and LT between the ED 244 and the light receiving element 241. Although not shown, the operating voltage of the mobile phone 1 is supplied from a built-in rechargeable battery, the operating voltage of each circuit of the expansion device 2 is supplied from the car battery, and the operating voltage of the headset 3 is Powered by an internal rechargeable battery.

FIG. 3 shows an example of the appearance of this handset 3, which is configured to be hands-free. That is, a receiver 312 is provided at one end of the headband 301, and a transmitter 311 is provided from that end through the support arm 302. When the headband 301 is set on the user's head, the receiver 312 and the transmitter are connected to each other. Talker 311
are adapted to fit the user's ears and mouth, respectively. Further, a light receiving element 341 and an LED 344 are provided at the top of the headband 301, and the LED 244 of the expansion device 2
Infrared light LR and LT are accessed between the light receiving element 241 and the light receiving element 241.

In such a configuration, when the mobile phone 1 is a standalone unit, it can be used as a normal mobile phone. That is, in this case, the switch 122 detects that the telephone 1 is not inserted into the slot of the automobile, and this detection output is supplied to the system controller 100. Then, the switch circuit 101 is activated by the system controller 100.
~104 are connected in the state shown.

Therefore, during a call, the audio signal ST from the transmitter 111 is supplied to the modulation circuit 114 through the signal line of the switch circuit 101 → audio data processing circuit 113 → switch circuit 102, and is converted into a transmission signal of a predetermined call channel. (modulated signal), this transmission signal is supplied to the antenna 116 through the power amplifier 115, and transmitted to the base station.

[0020] Also, the transmission signal from the base station is transmitted to the antenna 1.
16, and this received signal is sent to the tuner circuit 11.
7 and the other party's audio signal SR from the demodulation circuit 118.
is demodulated, and this signal SR is supplied to the receiver 112 through the signal line of switch circuit 103→processing circuit 113→switch circuit 104.

Furthermore, in the audio data processing circuit 113, the command signal from the system controller 100 is superimposed on the audio signal ST transmitted to the base station, and the command signal is separated from the baseband audio signal SR transmitted from the base station. The data is then taken out and supplied to the system controller 100. In this way, command signals necessary between the mobile phone 1 and the base station are also accessed to the base station through the system controller 100. Further, by using the key 121, a call is made.

[0022] Therefore, when the mobile phone 1 is a standalone unit, it can be used as a normal mobile phone.

On the other hand, when using this mobile phone 1 as a car phone, the mobile phone 1 is inserted into a slot on the dashboard of a private car, and a headset 3 is prepared. Then, connector 131 becomes connector 2.
31. In addition, the switch 122 detects that the mobile phone 1 is inserted into the slot on the dashboard, and this detection output is supplied to the system controller 100, and the system controller 100 outputs the detection output to the switch circuits 101 to 100.
are connected in the opposite state as shown in the figure. Furthermore, although not shown, the control signal line of the system controller 100 is connected to the connector 13.
1, 231 to circuits 214-218. Furthermore, the power to these circuits 214 to 218 is turned on, and the power to circuits 114 to 118 is turned off.

[0024] Therefore, the user's own (user's) voice is collected by the transmitter 311 and the voice signal ST is extracted.
This signal ST is supplied to the modulation circuit 343 and is, for example, F
It is converted into an M signal FT, and this signal FT is supplied to the LED 344, where it is converted into infrared light LT and output.

[0025] Then, this infrared light LT is transmitted to the light receiving element 24.
1, the FM signal FT is extracted, and this signal FT is supplied to the demodulation circuit 242 to generate the original audio signal S.
T is demodulated, and this signal ST is supplied to the modulation circuit 214 through the signal line of connector 231 → connector 131 → switch circuit 101 → audio data processing circuit 113 → switch circuit 102 → connector 131 → connector 231, and is sent to a predetermined communication channel. is converted into a transmission signal (modulated signal), and this transmission signal is supplied to the antenna 216 through the power amplifier 215 and transmitted to the base station.

[0026] Furthermore, the transmission signal from the base station is transmitted to the antenna 2.
16, and this received signal is sent to the tuner circuit 21.
7 and the other party's audio signal SR from the demodulation circuit 218.
is demodulated, and this signal SR is supplied to the modulation circuit 243 through the signal line of the connector 231 → connector 131 → switch circuit 103 → processing circuit 113 → switch circuit 104 → connector 131 → connector 231, and is supplied to the modulation circuit 243, for example, F
It is converted into an M signal FR, and this signal FR is supplied to the LED 244, where it is converted into infrared light LR and output. Then, this infrared light LR is received by the light receiving element 341 and an FM signal FR is extracted, and this signal FR is sent to the demodulation circuit 3.
42, the original audio signal SR is demodulated, and this signal SR is supplied to the receiver 312.

Therefore, in this case, by using the headset 3 in combination, the mobile phone 1 can be used as a hands-free car phone.

When making a call, before inserting the mobile phone 1 into the slot, press the talk key of the keys 121 and then enter the other party's number using the dial keys. This will be temporarily stored in the system controller 100. When the mobile phone 1 is inserted into the slot, the stored number of the other party is transmitted to the base station.

Thus, according to the present invention, the mobile phone 1 can be used as a normal mobile phone or a car phone.

In the above description, the light receiving element 241, the demodulating circuit 242, the modulating circuit 243, and the LED 244 can also be provided in the mobile phone 1. Further, dialing when making a call can also be performed by voice recognition. Alternatively, a key such as a dial key is prepared in the expansion device 2, and its output is sent to the system controller 10 through the connectors 231 and 131.
It can also be supplied to 0. Furthermore, in the above,
Although the switch 122 detects whether or not the mobile phone 1 is set in the expansion device 2, detection can also be performed using a light emitting element, a light receiving element, or the like. Furthermore, the rechargeable battery of the mobile phone 1 can also be charged from the car's battery. Furthermore, the present invention can also be applied to so-called digital cellular type mobile phones.

[0031]

According to the present invention, the mobile phone 1 can be used as a normal mobile phone or a car phone. In that case, according to the present invention, the transmission signal to the base station is transmitted with sufficient transmission power by the amplifier 215 and the antenna 216 outside the vehicle.
The other party can ensure the quality of the call during reception. Furthermore, since the transmission signal from the base station is received by the antenna 216 outside the vehicle, the quality of the communication received by the user can also be improved.

Furthermore, since a high-performance receiving circuit that takes Doppler effect, fading, delay control, etc. into consideration can be used as the receiving circuit 217, sufficient characteristics as a car telephone can be obtained. Also, whether you use mobile phone 1 as a regular mobile phone or a car phone, the command signals accessed with the base station, especially the registration number of mobile phone 1, are the same, so the There is no need to sign a car phone contract with the company.

Furthermore, although not shown, the operating voltage of the mobile phone 1 can be obtained from the car battery through the connectors 231 and 131, so there is no need to worry about the remaining capacity of the rechargeable battery built into the mobile phone 1. There's no need to. Alternatively, the time that the mobile phone 1 can be used becomes longer. Further, the headset 3 allows hands-free operation, and there is no need for a wired connection between the headset 3 and the expansion device 2, which improves operability. Furthermore, by simply connecting the mobile phone 1 to the expansion device 2, it can be used as a car phone, etc., so the ID card can be transferred to the mobile phone 1.
There is no need to take the phone out of the phone and set it in a regular car phone, which also improves operability.

[Brief explanation of the drawing]

FIG. 1 is a system diagram of an example of the present invention.

FIG. 2 is a system diagram of an example of an expansion device and a headset.

FIG. 3 is an external view showing an example of a headset.

[Explanation of symbols]

1 Mobile phone 2 Expansion device 3 Headset 100 System controller 111 Transmitter 112　Telephone receiver 113 Audio data processing circuit 114 Modulation circuit 117 Tuner circuit 118 Demodulation circuit 122 Detection switch 131 Connector 214 Modulation circuit 217 Tuner circuit 218 Demodulation circuit 231 Connector 241 Photo receiving element 242 Demodulation circuit 243 Modulation circuit 244 LED 311 Transmitter 312 telephone receiver 341 Photo receiving element 342 Demodulation circuit 243 Modulation circuit 244 LED

Claims (1)

[Claims] Claim 1: A transmitter, a transmitting circuit that converts an audio signal and a command signal to a base station into a transmitting signal, and transmitting a transmitting signal from the transmitting circuit and receiving a transmitting signal from the base station. a receiving circuit that extracts an audio signal and a command signal from the base station from the transmission signal received by the transmitting and receiving antenna from the base station, a receiver, a connector, and an expansion device installed in a vehicle or the like. and first and second switch circuits that are controlled based on the detection output of the detection means, and the detection output of the detection means detects whether the expansion device is set. When the transmitter indicates that it is not, the transmitter supplies its own voice signal from the transmitter and a command signal to the base station to the transmitter circuit through the first switch circuit and transmits it to the base station. At the same time, the other party's audio signal from the above receiving circuit is
supplying the handset through the second switch circuit;
When the detection output of the detection means indicates that the expansion device is set, the own voice signal from another transmitter and the command signal to the base station are transmitted to the first switch circuit and The signal is supplied to the transmission circuit of the expansion device through the connector and transmitted to the base station, and the other party's audio signal from the reception circuit of the expansion device is supplied to another receiver through the connector and the second switch circuit. A mobile phone designed to