JPH0681178B2 - Car phone - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to an automobile telephone that uses a speaker such as a car radio that is already installed in the automobile for a loudspeaking function or a calling function of the automobile telephone when operating the automobile telephone. .

(Prior Art) An example of a car phone is "FUJI" issued by Fujitsu Limited.
TSU ”1985-July issue VOL.36, No.5 P.505 to P.511, which consists of a radio, handset and control unit. In addition, it has a speaker inside a grader, which is a stand of a handset, or an external speaker.

FIG. 6 is a block diagram showing a schematic configuration of a conventional car telephone. A reception signal 64 from the receiving unit 71 of the wireless device 63 is supplied to a switch circuit 65 in the grader 62 which is normally controlled by the wireless device 63, is amplified by a speaker amplifier 66, and sounds a speaker 67 for a loud sound function. Speaker
When ring 67 is not ringing, received signal 64 rings handset 68 in handset 61. On the other hand, the voice of the talker is the handset.
A transmitter 69 in 61 converts the electric signal into a transmission signal 70 and supplies the electric signal to a transmitter 72 in the wireless device 63. As described above, the speaker 67 is provided in the automobile telephone, and is independent of the speaker of the car radio or the like already installed in the automobile.

(Problems to be Solved by the Invention) However, in the above-mentioned conventional device, when the sound is output from the speaker at the time of reception, the sound of a speaker such as an existing car radio in the automobile is throttled or a power source such as a car radio is turned on. If it is not turned off, there is a problem in that the sound of the car radio or the like interferes with the call by the car telephone and a good call cannot be performed. Further, as described above, the operation of the car radio or the like is required, and it is very troublesome for the driver to do this, and it is very dangerous in driving.

The present invention is to solve these problems, and by operating the speaker of an existing car radio or the like to automatically switch the sound from the car radio or the like and the sound from the car telephone, the operation is performed. It is an object of the present invention to provide a mobile phone that can improve safety and safety.

(Means for Solving Problems) In order to solve the above problems, the present invention displays information about telephone calls on an automobile telephone that outputs a voice from a speaker of an existing car radio or the like of a vehicle to make a telephone call. Display means, a speaker switching means for switching an input signal supplied to the speaker from the car radio side or the telephone side, a radio device for receiving and transmitting a telephone, and display data supplied to the display means. Monitoring means for monitoring the content, detecting means for detecting a control signal indicating the monitoring result from the monitoring means, control means for detecting the control signal by the detecting means, and controlling the drive of the speaker switching means based on the control signal It is characterized by having.

(Operation) According to the present invention having the above-mentioned configuration, the voice of the telephone call of the automobile telephone is made from the speaker of the car radio or the like already installed in the automobile, and therefore the speaker is for the car radio or the like and the automobile telephone. It will be used together with. Therefore,
When the content of the display data monitored by the monitoring means is such that the signal from the wireless device needs to be supplied to the speaker, the input signal supplied to the speaker is switched to the telephone side by the speaker switching means. When the content is not required, the speaker switching means switches the input signal supplied to the speaker to the car radio side or the like.

Therefore, the present invention can solve the above-mentioned problems, and can provide an automobile telephone capable of improving operability and safety.

(Embodiment) An embodiment of the present invention will be described below with reference to the drawings.

FIG. 1 is a block diagram showing an embodiment of the present invention. In the figure, the same reference numerals as in FIG. 6 indicate the same components. The speaker switching circuit 3 is a circuit for connecting the car radio speaker 1 to the car radio 2 as shown by the relay contact 4 or to the car amplifier side, that is, the speaker amplifier 66 in the grader. Relay contact 4
Operates by passing a current from the relay drive circuit 12 through the relay coil 5. In this way, the control circuit 14 for controlling the speaker switching circuit 3 includes the data detection circuits 9 and 10 connected to the data bus 15, and the data detection circuit 9 from the microcomputer 13 via the data bus 15 to the reception unit 71. A timer circuit 11 which outputs an ON signal for a predetermined period of time when a control signal for outputting the received signal from the car radio speaker 1 is detected, and a current is supplied to the relay coil 5 based on the ON signal from the timer circuit 11. Relay drive circuit 12
Consists of. On the other hand, the grade 8 62 microcomputer 8 is the radio 63 microcomputer on the data bus 15.
When the control signal from 13 is detected, the switch circuit 65 is turned on and the received signal 64 from the receiving unit 71 is sent to the speaker amplifier 66,
It is supplied to the car radio speaker 1 via a relay contact. In addition, the microcomputer 13 of the radio 63 is a radio
When 63 detects that the telephone is in a call state, a control signal indicating that the telephone is in a call state is output on the data bus 15 and the display 6 is displayed via the microcomputer 7 of the handset 61. This display 6 is called an INUSE display. The data detection circuit 10 that has detected the data to be displayed on the display 6 is a circuit for starting the relay drive circuit together with the output of the timer circuit 11. Relay drive circuit
Reference numeral 12 switches the car radio speaker 1 to the car telephone device side by passing a current through the relay coil 5 of the speaker switching circuit 3. As described above, the speaker is switched to the car telephone side when the wireless device needs to emit sound from the speaker of an existing car radio or the like, or when the wireless device is in a call state.

Next, FIG. 2 is a block diagram showing another embodiment of the present invention, and shows a modification of the circuit configuration of the radio device 63 of FIG. In the figure, the microcomputer 13 outputs the output on the address setting control line 21 and the output on the data transmission / reception line 22. This is repeated I / O circuit 25 is a data bus
Send serial data onto 15. When the data for ringing the speaker in the serial data or the data to be displayed on the display 6 of the handset 61 in FIG. 1 is generated, the following operation is performed.

When a condition for connecting a signal to the speaker amplifier 66 is generated on the data bus 15, the microcomputer 13 outputs a predetermined output to the address setting control line 23, and then outputs an ON signal to the data transmission / reception line 24. The input / output circuit 26 applies a current to the relay coil 5 to switch the relay contact 4 of the speaker switching circuit 3 to the side of the automobile telephone. After that, when a condition occurs to stop connecting the signal to the speaker amplifier on the data bus 15, after a predetermined time, the microcomputer 13 outputs an off signal to the data transmission / reception line 24. The input / output circuit 26 stops applying current to the relay coil 5 and switches the relay contact 4 of the speaker switching circuit 3 to the car radio 2.

Next, when the condition for generating the data to be displayed on the display 6 of the handset 61 on the data bus 15 is satisfied, the microcomputer 13 outputs the predetermined data to the address setting control line 23, and then the data transmission / reception line. The ON signal is output to 24.
The input / output circuit 26 applies a current to the relay coil 5 to switch the relay contact 13 of the speaker switching circuit 3 to the car telephone side.
Next, the microcomputer 13 outputs predetermined data to the address setting control line 23 and then outputs an off signal to the data transmission / reception line 24 when the condition for turning off the display on the display 6 of the handset 61 is satisfied. The input / output circuit 26 stops applying current to the relay coil 5, and the relay contact 4 of the speaker switching circuit 3
Switch to car radio 2.

Next, FIG. 3 is a circuit diagram showing a concrete circuit of the control circuit 14 of FIG. In the figure, 31 and 32 are input terminals for clock data and serial data, which are a part of the data bus 15 in FIG. 33 to 39 are shift register circuits,
Serial data connected to the serial input terminal SI is in synchronism with each bit clock data, accumulated from the Q ₀ output of the shift register circuit 39 to the Q ₃ output of the shift register circuit 33 sequentially, each output Q as an output signal appearing in the ₀ ~Q _3.
This output is NAND circuit 40 ~ 44, inverter circuit 45 ~ 49, NAND
The determination is made by a logic circuit composed of the circuits 50 and 51. 52 to 59 are analog switches, each of which constitutes a pair of analog switches. The signal path is selected by the control signals (Q ₁ , ₁ ) and (Q ₁ , ₂ ) of each analog switch pair.

By the way, there are two kinds of data to be judged, that is, the data stored in the shift register circuits 33 to 39, one example of which is shown in FIG. 4 and FIG.

Here, assuming that the bit of EN in the pattern shown in FIG. 5 is at the H level, if it is accumulated in the shift register circuits 33 to 39, the output of the logic circuit, that is, the output of the NAND circuit 50 becomes H level.
Then, the flip-flop 80 is set through the analog switch pair 53, and its output Q is set to H level and at the same time the output is set to L level. Next, the output Q is an OR circuit
The signal is transmitted through 82, 83 and is output to the output terminal 84. This output causes a current to flow through the relay coil 5 in FIG. 1, and switches the relay contact 4 of the speaker switching circuit 3 to the side of the automobile telephone.

Next, when the data pattern for supplying the reception signal 64 of FIG. 1 shown in FIG. 4 to the car radio speaker 1 is changed to the data whose EN bit is L, the Q ₁ output of the shift register circuit 39 is output. , In the beginning, a analog switch pair 55
This time, pass through the inverter 48 and the analog switch pair 54, and enter the logic circuit. This is because the control signal (Q ₁ and ₁ ) at the beginning, that is, the output Q of the flip-flop 80 was at the L level or the output at the H level, but this time, as described above, the output Q is at the H level. To the level again
This is because the output is at the L level, the control signal is also reversed by this, and the passage and disconnection of the analog switch pair 54, 55 are reversed. Again, NAND
The output of the circuit 50 becomes H level. However, this time, after that, the flip-flop 80 is reset through the analog switch 52, its output Q becomes L level, and the output is H level.
Become a level. This output which has become H level activates the multivibrator circuit 85, and this output Q is returned to L level after being at H level for a time determined by the resistor 37 and the capacitor 38. Due to the outputs of the flip-flop 80 and the multivibrator 85, the signal output from the output terminal 84 via the OR circuits 82 and 83 is cut off after the lapse of the time, and the current of the relay coil 5 in FIG. 1 is cut off. The relay contact 4 of the speaker switching circuit 3 is returned to the car radio 2 side.
However, if it is not necessary to turn off the output of the output terminal 84 after a certain time has elapsed in the above, the multivibrator 85
Can be omitted. In this case, use the data pattern shown in Fig. 4 for EN.
As soon as the L level data is received, the output from the output terminal 84 is cut off.

On the other hand, when the data pattern displayed on the display 6 of FIG. 1 shown in FIG. 5 and the data of which the IN bit is at the H level is received, an output is generated to the OR circuit 51 of FIG. The output is output to the output terminal 84 through the loop 81. Further, when the data pattern shown in FIG. 5 receives the data in which the IN bit is at the L level, the output terminal 85 is immediately cut off as in the case of the above-mentioned proviso. The signal path of the analog switch pair in the above case passes through the analog switch pair 57, 59 in the first case and passes through the analog switch pair 56, 58 in the latter case.

(Effect of the Invention) As described above, according to the present invention, the call output of the mobile phone is performed from the speaker of the existing car radio,
In addition, by automatically switching to the speaker for the automobile telephone in the call state, it is possible to improve operability and safety. Further, the present invention is indispensable for a mobile phone with a hands-free call function, and a more remarkable effect appears.

[Brief description of drawings]

FIG. 1 is a block diagram showing an embodiment of the present invention, FIG. 2 is a block diagram showing another circuit configuration of the radio device 63 of FIG. 1, and FIG. 3 is a specific example of the control circuit 14 of FIG. FIG. 4 is a circuit diagram showing an example of a circuit, FIG. 4 is a diagram showing a data pattern for supplying the reception signal 64 of FIG. 1 to a car radio speaker, and FIG.
The figure which shows the data pattern displayed on the indicator 6 of a figure, 6th
FIG. 1 is a block diagram showing a schematic configuration of a conventional car telephone. 1 ... Car radio speaker, 2 ... Car radio, 3 ... Speaker switching circuit, 4 ... Relay contact, 5 ... Relay coil, 6 ... Display, 7,8,13 ... Microcomputer, 9 , 10 …… data detection circuit, 11 …… timer circuit, 12 …… relay drive circuit, 14 …… control circuit, 15 …… data bus, 61 …… handset, 62 …… gradel, 63 …… radio machine, 64 …… received signal, 65 …… switch circuit, 66 …… speaker amplifier, 68 …… receiver, 69 …… transmitter, 70 …… transmitted signal, 71 …… receiver, 72 …… transmitter.

Claims (1)

[Claims] 1. In a car telephone which outputs a voice from a speaker such as an existing car radio of a car and carries out a call, a display means for displaying information on a phone call and an input signal supplied to the speaker are supplied to a car radio. Speaker switching means for switching from the equal side or the telephone side, a radio device for receiving and transmitting telephone calls, a monitoring means for monitoring the contents of display data supplied to the display means, and a monitoring result from the monitoring means And a control means for detecting the control signal by the detection means and controlling the drive of the speaker switching means based on the control signal. When the content of the display data is such that it is necessary to supply a signal from the radio device to the speaker, Switch the input signal supplied to the speaker to the telephone side,
An automobile telephone characterized in that, when the content is not required, the input signal supplied to the speaker is switched to a car radio or the like by the speaker switching means.