KR950009563B1 - Hand-free cellular phone - Google Patents

Abstract

The phone comprises a sound signal input/output terminal for inputting/outputting a sound signal to a cellular phone; a first switch for providing the sound signal inputted from the sound signal inputting terminal to a sound signal processing part under control of a CPU; a second switch for providing the sound signal inputted from the sound signal processing part to the sound signal outputting terminal under control of the CPU; a first CPU for performing a control operation in the fixing device; a second CPU for displaying an operating state under control of the first CPU; a buffer for transferring data transferred and received by the CPUs; a hook sensing part for sensing the attachment of the cellular phone, and applying the sensed information to the first CPU; a speaker for inputting or outputting the sound signal under control of the first CPU; a keyboard/signal generating part for applying a control command to the first CPU, outputting a generated dial data to the buffer through the first CPU, and outputting a ring signal under control of the first CPU when ring data is inputted to the first CPU through the buffer; and a third switch for providing the sound signal applied from the speaker to the first switch through the sound signal inputting terminal, and providing the sound signal from the second switch through the sound signal outputting terminal to the speaker.

Description

Cell phone that can be fixed while talking

1 is a block diagram schematically showing a circuit configuration of a conventional cellular phone.

2 is a block diagram showing the circuit configuration of the cellular phone according to the present invention.

3 is a block diagram showing the circuit configuration of the cell phone fixing device according to FIG.

4 is a flowchart for explaining the operation of the cellular phone according to the present invention.

* Explanation of symbols for main parts of the drawings

1 antenna 2 local oscillator

3: demodulator 4: modulator

5: voice signal processor 6: CPU

7: handset 8: handset

21: CPU 22: display

23: buffer 24: hook detection unit

25: speaker / microphone 26: switch

27: keyboard / signal generator

The present invention relates to a cell phone, and more particularly, to a cell phone that is capable of dialing and handset while the cell phone is attached to a fixing device.

1 is a block diagram showing a circuit configuration of a conventional cellular phone. The demodulator extracts a desired signal by demodulating the high frequency signal received from the antenna 1 according to the local oscillator frequency signal generated by the local oscillator 2 ( 3) a modulator 4 for modulating the voice signal according to the local oscillation frequency signal generated by the local oscillator 2 and outputting it through the antenna 1, and a voice signal processor for switching the call path as necessary ( 5) It is comprised including the CPU 6, the handset 7, and the handset 8 which control the whole system.

The voice signal processor 5 outputs a signal input from the antenna 1 and demodulated by the demodulator 3 as a voice signal through the receiver 7, and modulates the voice signal input to the transmitter 8. The output is through 4).

By the way, the conventional cell phone is inconvenient to use because when the user uses in the car, the user must separate the cell phone from the fixing device to always hold the phone in hand. In particular, when the driver needs to talk while driving, the cellular phone is detached from the fixed device installed in the car, so that the user can talk and drive at the same time with his hand.

Accordingly, the present invention has been made in view of the above-described problems, and an object of the present invention is to provide a cellular phone and a method for making a call even when the cellular phone is fixed to a fixed device.

In order to achieve the above object, the present invention provides a cellular phone capable of making a call in a fixed state, wherein a voice signal input terminal RX and a voice signal output terminal TX for inputting and outputting a voice signal to and from the cellular phone. And a first switch (SW2) for connecting a voice signal input from the talker (8) and the voice signal input terminal (RX) to the voice signal processor (5) under the control of the CPU (6), and the voice signal processor A second switch (SW1) for connecting the audio signal applied from (5) to the handset 7 and the audio signal output terminal TX under the control of the CPU 6; CPU 21 performing a control operation to the fixed device, CPU 22 displaying an operation state under control of the CPU 21, and data transmitted / received between the CPU 21 and the CPU 6 A buffer 23 to be transmitted, a hook detecting unit 24 which detects whether the cellular phone is attached and applies the corresponding sensing information to the CPU 21, and operates according to the control of the CPU 21. A control command is applied to the speaker and microphone 25 for inputting and outputting signals, and the CPU 21 recognizes the dial, generates dial data, and outputs the dial data to the buffer 23 through the CPU 21. When the ring data is input to the CPU 21 through the buffer 23, the keyboard / signal generator 27 generates a ring tone under the control of the CPU 21, and the control of the CPU 21. Accordingly, the voice signal applied from the speaker and the microphone 25 is connected to the first switch SW2 through the voice signal input terminal RX. And a switch 26 for connecting a voice signal applied from the second switch SW1 through the voice signal output terminal TX to the speaker and the microphone 25. Provides a callable cell phone.

In addition, the present invention provides a method of making a call in a fixed state of the cell phone, the first step of checking whether or not the cell phone is attached to the fixing device, and in the first step the cell phone is attached to the fixing device The second step of checking whether or not the transmission is made using the fixing device, and if there is ring data applied to the fixing device from the cellular phone when the transmission is not made using the fixing device in the second step, the fixing is performed. A third process of the device generating audible ring tones, and after the third process, the fixing device outputs data for notifying that the call is initiated when its on-hook button is input to the cellular phone and at the same time the speaker and the microphone of the device; Connecting to the cellular phone side and switching the speaker and the microphone to an operational state; and in the fourth process When the cellular phone receives data indicating that the call is initiated from the fixed device, the voice signal processor is connected to the speaker and the microphone of the fixed device, and then the voice signal received through the wireless channel is connected to the speaker of the fixed device. And outputting the voice data from the speaker and the microphone of the fixing device through the wireless channel and transmitting the dial data using the fixing device in the second process. And a sixth process of transmitting to a wireless channel through the cellular phone.

With this configuration, the present invention can execute a call in a state where the cellular phone is fixed to the fixing device, thereby greatly improving the convenience of the user.

Hereinafter, with reference to the accompanying drawings will be described an embodiment according to the present invention.

2 is a block diagram showing the circuit configuration of the cellular phone according to the present invention, which is similar to the conventional cellular phone described in FIG. 1 with an antenna 1, a local oscillator 2, a demodulator 3, and a modulator 4 And a voice signal processor 5, a CPU 6, a receiver 7, and a transmitter 8. In FIG. 2, switches SW1 and SW2 are provided between the audio signal processor 5, the handset 7, and the talker 8, respectively. According to the control, the voice signal input through the voice signal processor 5 is switched to the receiver 7 or the voice signal output terminal TX, and the switch SW2 is connected to the voice signal input terminal under the control of the CPU 6. The voice signal input through the RX or the talker 8 is switched to the voice signal processing section 5.

In addition, the voice signal output terminal TX and the voice signal input terminal RX are connected to a handset and a talk device external to the cellular phone. In this embodiment, the terminal is coupled with a fixing device for fixing the cellular phone. Will be.

In addition, serial data inputted to and outputted from the serial data ports TXD and RXD to the CPU 6 are also transmitted and received with the fixing device described below in this embodiment.

3 is a convex configuration showing the internal circuit configuration of the fixing device according to the present invention. In the drawing, reference numeral 21 is a CPU for controlling the entire apparatus, 22 is a display indicating a current operating state, and 23 is a cellular phone. A buffer for temporarily storing serial data transmitted and received to and from the CPU 6 side, a hook detecting unit for detecting whether the cellular phone is attached to the fixed device, 25 a speaker and a microphone installed in the fixed device, 26 Is a switch for switching a voice signal transmitted and received between the cellular phone and the fixed device according to the control of the CPU 21, 27 is a control command is input to the CPU 21 and the dial data generated by recognizing a dial is input to the CPU 21; It is a keyboard / signal generator for outputting to the buffer 23 side through the buffer 23 and generates an audible ring signal sound under the control of the CPU 21 when the ring data is input to the CPU 21 through the buffer 23.

In addition, although not shown in the drawings, the fixing device is provided with a power supply unit for supplying power to each circuit unit.

Next, the operation of the cellular phone and the fixing device having the above configuration will be described using the flowchart shown in FIG.

First, when the cellular phone is separated from the fixed device, the CPU 6 of the cellular phone determines the switch based on the serial data TXD and RXD transmitted and received from the fixed device through the serial data ports TXD and RXD. By switching control of SW1 and SW2, the audio signal processing section 5 is connected to the handset 7 and the talker 8 of the cellular phone. Therefore, in this case, the same operation as the conventional cell phone is performed.

Meanwhile, when the cellular phone is attached to the fixing device, the CPU 21 of the fixing device detects that the cellular phone is attached through the hook detecting unit 24, indicating that the cellular phone is attached to the fixing device. Serial data is transmitted to the cellular phone CPU 6 through the buffer 23 and the serial data ports TXD and RXD. Thus, the CPU 6 detects that the cellular phone is attached to the fixing device.

In this state, when a specific frequency that modulates the ring data from the switching center is received by the antenna 1, the CPU 6 transmits the ring data to the buffer 23 of the fixed device through the serial data ports TXD and RXD. (Step ST1), when ring data is input from the cellular phone through the buffer 23, the CPU 21 of the fixing device checks whether the cellular phone is attached to the fixing device through the hook detecting unit 24. It is determined whether or not the fixing device is in use (step ST2, ST3). In this case, since ring data is received from the cellular phone's CPU 6 (step ST4), the CPU 21 controls the keyboard / signal generator 27 to ring a ring signal as ring data is detected. (ST5, ST6 steps)

Subsequently, the CPU 21 detects whether the on-hook button installed in the keyboard / signal generator 27 is turned on (step ST7) and sends data to the CPU 6 of the cellular phone when the on-hook button is pressed. In addition to the transmission, the switch 26 also controls the switches SW1 and SW2 to connect the call path to the switch 26 side of the fixing device (step ST8). At this time, when the CPU 21 controls the speaker and the microphone 25 to make it operable, the voice signal input to the speaker and the microphone 25 is the switch 26, the switch SW2, and the voice signal processor 5. , And are transmitted via the modulator 4 and the antenna 1, and the voice signal received through the antenna 1 and the demodulator 3 is passed through the voice signal processor 5, the switch SW1, and the switch 26. Is applied to the speaker and the microphone 25. Therefore, the user can make a call using the speaker and the microphone 25 installed in the fixing device.

On the other hand, when making a call using a fixed device (step ST9), the CPU 21 receives dial data from the keyboard / signal generation unit 27 (step ST10), and the cell phone of the cellular phone via the buffer 23. The CPU 6 transmits the data to the CPU 6 and displays it on the display 22. Then, the CPU 6 modulates the dial data through the modulator 4 and transmits the data to the switching center (step ST11). Therefore, even in this case, the user can make a call using the speaker and the microphone 25 installed in the fixing device.

Since the embodiments of the present invention have been described above, the present invention is not limited to the above embodiments and can be modified in various ways without departing from the technical gist of the present invention. That is, in the above embodiment, only the case where the cellular phone is installed in the fixed device is described. However, when the cellular phone is used in the vehicle, the voice signal input / output terminal provided in the cellular phone is connected to a speaker installed in the vehicle. Can also be used.

As described above, according to the present invention, when the cellular phone is used in an automobile, the call can be carried out while being fixed to the fixing device, thereby increasing the convenience in using the cellular phone.

Claims (2)

A cell phone capable of making a call in a fixed state, comprising: a voice signal input terminal (RX) and a voice signal output terminal (TX) for inputting and outputting a voice signal to and from the cellular phone, a talker (8) and the voice signal input A first switch SW2 for connecting a voice signal input from the terminal RX to the voice signal processor 5 under the control of the CPU 6, and a voice signal applied from the voice signal processor 5; A second switch SW1 connected to the receiver 7 and the audio signal output terminal TX under the control of (6); CPU 21 performing a control operation to the fixed device, CPU 22 displaying an operation state under control of the CPU 21, and data transmitted / received between the CPU 21 and the CPU 6 A buffer 23 to be transmitted, a hook detecting unit 24 which detects whether the cellular phone is attached and applies the corresponding sensing information to the CPU 21, and operates according to the control of the CPU 21. A control command is applied to the speaker and microphone 25 for inputting and outputting signals, and the CPU 21 recognizes the dial, generates dial data, and outputs the dial data to the buffer 23 through the CPU 21. When the ring data is input to the CPU 21 through the buffer 23, the keyboard / signal generator 27 generates a ring tone under the control of the CPU 21, and the control of the CPU 21. Accordingly, the voice signal applied from the speaker and the microphone 25 is connected to the first switch SW2 through the voice signal input terminal RX. And a switch 26 for connecting a voice signal applied from the second switch SW1 through the voice signal output terminal TX to the speaker and the microphone 25. Callable cell phone. A method of making a call while a cell phone is fixed, the method comprising: a first step of checking whether a cell phone is attached to a fixing device; and if the cell phone is attached to the fixing device in the first step, the fixing device A second process of checking whether or not to transmit using the ring, and if there is ring data applied to the fixing device from the cellular phone when the second device is not transmitting using the fixing device, the ring can be heard by the fixing device. A third process of generating a beeping sound, and after the third process, the fixing device outputs data for notifying that the call is initiated when its on-hook button is input to the cellular phone and simultaneously sends its speaker and microphone to the cellular phone side; Connecting the speaker and the microphone to an operable state; and in the fourth process, the cellular phone When receiving data indicating that a call is initiated from the fixed device, the voice signal processor is connected to the speaker and the microphone of the fixed device, and the voice signal received through the wireless channel is connected to the speaker and the microphone of the fixed device. Outputting and transmitting voice signals applied from the speaker and the microphone of the fixing device through the wireless channel, and when the transmitting device uses the fixing device in the second process, the fixing device transmits dial data to the cellular phone. And a sixth process of transmitting to a wireless channel through the cellular phone.