KR100251562B1 - Apparatus and method for power saving of wireless phone - Google Patents

Abstract

PURPOSE: An apparatus for saving a consuming power of a cordless telephone and a method thereof are provided to prevent a portable apparatus to be completely discharged and save the consuming power by stopping all operations in the portable apparatus when there is not a key input during a certain time. CONSTITUTION: A central processing part(110) performs a stop mode for stopping all operations when certain key data are not inputted during a certain time, and resumes the operation by using a reset operation of a resetting part(210) when a user again inputs certain key data. The resetting part(210) activates a reset terminal in the central processing part(110) when a certain key is inputted during the above stop mode, converts the portable apparatus into an operating mode.

Description

Power saving device and method for a cordless phone. {APPARATUS AND METHOD FOR POWER SAVING OF WIRELESS PHONE}

The present invention relates to a portable device of a radiotelephone, and more particularly, to an apparatus and a method for saving power consumed in the portable device.

As the user's desire for wireless communication increases, the demand for wireless telephones is also increasing, and convenience of use is further demanded.

Typically, a wireless telephone is composed of a fixed device connected to the switch via a telephone line for wired communication, and a portable device for wireless communication through the relay of the fixed device.

The portable device operates by receiving power from a rechargeable secondary battery, and its use time is determined by battery capacity and power consumption.

In addition, the portable device normally supplies power to check whether there is a call signal from the fixed device even if the mobile device is not in a call, and periodically maintains a reception state for a predetermined time and the remaining time is in a power down state. As a result, the portable device continues to draw a certain amount of current without recharging. Therefore, when the portable device is left uncharged for a long time without being placed on the charging device, for example, when the user leaves the house for more than the maximum usage time, the battery is completely discharged. It was possible to use a portable device after the operation. In addition, if the discharge is excessive, the life of the battery is reduced, the problem that charging is impossible.

Therefore, an object of the present invention is to stop all the operation of the portable device if a key input is not made for a predetermined time in a cordless phone consisting of a fixed device and a portable device, after which the reset unit is provided in the portable device according to the user's key input The present invention provides an apparatus and method for activating a reset terminal of a central control unit to re-operate the portable device to prevent complete discharge of the portable device and to save power consumption.

1 is a block diagram of a fixing device in a wireless telephone according to an embodiment of the present invention.

2 is a block diagram of a portable device in a wireless telephone according to an embodiment of the present invention.

3 is a detailed circuit diagram of a receiver according to an embodiment of the present invention.

4 is a flowchart illustrating a process of saving power consumption in a portable device according to an embodiment of the present invention.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings. First, in adding reference numerals to the components of each drawing, it should be noted that the same reference numerals have the same reference numerals as much as possible even if displayed on different drawings. In the following description of the present invention, if it is determined that a detailed description of a related known function or configuration may unnecessarily obscure the subject matter of the present invention, the detailed description thereof will be omitted.

1 is a block diagram of a fixing device in a wireless telephone according to an embodiment of the present invention.

Referring to the drawings, the central control unit 10 controls the overall operation of the fixing device. The central control unit 10 is a one chip microprocessor, and includes a ROM for storing a program and a RAM for temporarily storing data generated during the execution of the program.

The transmitter 20 modulates and frequency-converts the data output from the central control unit 10 or the voice signal output from the microphone 30 and outputs it in the form of a wireless signal.

Transmitting and receiving separation unit 40 serves to separate the transmission and reception to transmit to the antenna 50 by separating the transmitted or received radio signal.

The receiver 60 converts and demodulates the received radio signal separated by the transceiver 40 to transmit a voice signal to the speaker 70 and transmits data to the controller 10.

The frequency synthesizer 80 generates a frequency for designating a transmission / reception channel of the transmitter 20 and the receiver 60 under the control of the central controller 10.

The trunk line connecting unit 90 is connected to the switching network in a wired manner, and interfaces signals (eg, ring signals) between the fixing device and the control unit of the switching network for connection with the switching network, and a voice signal between the fixing device and the switching network. Interface.

2 is a block diagram of a portable device in a wireless telephone according to an embodiment of the present invention.

The central control unit 110 controls the overall operation of the portable device. The central control unit 110 is a one chip microprocessor, and includes a ROM for storing a program and a RAM for temporarily storing data generated during the execution of the program. In particular, the central control unit 110 includes a timer and stops all operations of the portable device including itself unless a predetermined key data is input while the operation of the timer is completed. That is, stop mode is performed. When the user inputs predetermined key data again, the central control unit 110 resumes the operation by the reset operation of the reset unit 210.

The transmitter 180 modulates and frequency-converts the data output from the central control unit 110 or the voice signal output from the microphone 120 and outputs the result in the form of a wireless signal.

Transceiver separation unit 130 serves to separate the transmission and reception to transmit or receive the radio signal to be transmitted to the antenna 140.

The receiver 150 converts and demodulates the received radio signal separated by the transceiver 130 to transmit a voice signal to the first speaker 160, and transmits data to the central controller 110.

The frequency synthesizer 170 generates a frequency for designating a transmission / reception channel of the transmitter 180 and the receiver 150 under the control of the central controller 110.

The key input unit 190 includes a plurality of keys for dialing and various function keys such as a use mode switching key, and generates key data by an external operation and outputs the key data to the central controller 110.

The display unit 200 is a liquid crystal display (LCD), and receives the display data from the central control unit 110 to display the state of the portable device.

Figure 3 shows a specific circuit diagram of the reset unit according to an embodiment of the present invention. A description with reference to FIG. 2 is as follows.

Referring to the drawings, reference numeral 212 denotes a main body of the reset unit 210 as a NAND gate. 111 illustrates a state terminal of the central control unit 210 used as the first input terminal of the NAND gate 212. In addition, when performing the stop mode according to the present invention, the central control unit 210 sets the state terminal to 'High'.

In addition, reference numeral 211 denotes a switch used as a second input terminal of the NAND gate 212, one end of which is connected to a power supply VCC and one end of which is connected to the second input terminal connected to a grounded resistor R2 to provide a key input unit. It is switched by the operation of the key. Herein, the key may be any key of the key input unit, but the call key will be described as an embodiment. In addition, 112 indicates a limit terminal of the control unit used as an output terminal of the limit unit 210.

And Table 1 shows the operation of the logic unit 210.

Status terminal of controller Call key Return terminal of the control unit Stop mode (″ H ″) Pressed L Falling H Operation Mode (″ L ″) X H

In this case, the stop mode shown in Table 1 refers to a mode in which power supply is interrupted when there is no key input for a predetermined time to stop all operations of the portable device including the central control unit 210. The mode in which the device is operating. The switching from the stop mode to the operation mode is performed by the reset unit 210 activating the reset terminal of the central control unit 110 of the portable device and resuming the operation of the central control unit 110 according to a user's key input. Lose. L means a low value and H means a high value. In addition, X (don't care) means irrespective of operation of a call key. Hereinafter, an embodiment of the present invention will be described in detail with reference to FIGS. 2 to 3 and Table 1 below.

C1의 시정수에 의해서 지수적으로 증가하는 형태를 가지므로, 휴대장치의 중앙 제어부(110)는 리셋부(210)의 출력에 의해 초기화 되고 동작을 시작한다.Since the second input terminal of the NAND gate 212 is connected to ground by the resistor R2 when the battery is coupled, the second input terminal has a second predetermined state L. Therefore, the output terminal of the NAND gate 212 is in the first predetermined state H, and the output waveform is R1.

Since the exponentially increases by the time constant of C1, the central control unit 110 of the portable device is initialized by the output of the reset unit 210 and starts operation.

In addition, the central control unit 110 of the portable device which started the operation first resets and operates the timer and continuously checks whether the timer is equal to or greater than the reference value. If the timer is not equal to or greater than the reference value, the central controller 110 checks whether there is a key input. If the timer is equal to or greater than the reference value, the central control unit 110 performs the stop mode according to the present invention. The stop mode is a mode in which the central control unit 110 stops all operations of the portable device including itself.

If the timer is not greater than the reference value and there is a key input, the timer is reset. If the timer is not greater than the reference value and there is no key input, the timer is increased by one and the operation of checking whether the timer is equal to or greater than the reference value is repeated. Perform.

Meanwhile, in the stop mode, the state terminal of the central control unit 110 is referred to as the first predetermined state (H), and when the user presses a predetermined key (for example, a call key), the VCC is applied to the second input terminal of the NAND gate. When the output terminal of the gate is in the second predetermined state (L) and is released again, the second input terminal of the NAND gate is connected to the ground by the resistor (R2) and has the second predetermined state (L). The predetermined state (H) is reached. Accordingly, the user may press and release a predetermined key such as a call key to switch the portable device in the stop mode back to the operation mode.

According to the embodiment of the present invention, when there is no key input for a predetermined time or more, the portable device performs a stop mode for stopping all operations of the portable device including the central control unit, and consumes a very small current to prevent complete discharge. It can be seen that power consumption can be saved. In addition, when the user attempts to make a call or rings a ringing device or a parallel connected telephone by an external telephone after the user returns from the outside, the user switches to the normal operation mode by pressing a predetermined key. You can speak with

4 is a flowchart illustrating a process of saving power consumption in a portable device according to an embodiment of the present invention.

Hereinafter, a detailed description will be made based on the configuration of FIGS. 2 and 3 described above.

When the portable device is disconnected from the charging device or a new battery is inserted, the central control unit 110 initializes the timer in step 300 and then timings in step 310. In operation 320, the central controller 110 determines whether the timing time has reached a predetermined time. If the determination result is a predetermined time, the central control unit 110 switches to the stop mode in step 340 to stop the power supply to stop all operations of the portable device. Then, when the call key is manipulated and the call key data is input, in step 360, the reset unit 210 performs a switching operation by the key input to activate the reset terminal of the central control unit 110. As a result, the central control unit 110 releases the stop mode, supplies power, and switches to the operation mode, and then performs step 300 again.

Meanwhile, when the timing time has not yet reached a predetermined time as a result of the determination in step 320, the central controller 110 monitors whether call key data is input in step 330. When the call key data is input in step 330, the flow returns to step 300 to initialize the timer, and when the call key data is not input, returns to step 310.

As described above, according to the present invention, in a wireless telephone having a fixed device and a portable device, if a key input is not performed for a predetermined time, all operations of the portable device are stopped, and then the reset unit performs a switching operation according to a user's key input. By activating the reset terminal of the central control unit provided in the portable device to operate the portable device again, there is an advantage that can prevent a complete discharge of the portable device and save power consumption.

Claims (5)

In a cordless telephone comprising a fixed device and a portable device, a device for preventing complete discharge of the portable device, A central control unit performing a stop mode for stopping all operations of the portable device including itself if a predetermined key input is not performed for a predetermined time or more; When the predetermined key is input while the stop mode is executed, the fixed device and the portable device are characterized in that the reset unit for activating the reset terminal of the central control unit to switch the portable device to the operation mode by the input of the predetermined key. A device for preventing complete discharge of said portable device in a cordless telephone. The method of claim 1, wherein the reset unit, A first input terminal is connected to a state terminal of the central control unit that changes a value according to the operation mode or the stop mode, and a second input terminal is connected to a resistor having one end connected to a power supply and the other end connected to a grounded key. And a NAND gate connected to a switch operated by the output terminal, the output terminal being connected to a reset terminal of the control unit. A method for preventing complete discharge of a portable device in a cordless telephone comprising a fixed device and a portable device, A first step of performing a stop mode for stopping all operations of the portable apparatus including a central controller if a predetermined key input is not performed for a predetermined time or more; And a second process of activating a reset terminal of the central control unit to switch the portable device to an operation mode when a predetermined key is input while the stop mode is performed. A method for preventing complete discharge of the portable device in a cordless telephone. The method of claim 1, wherein for a predetermined time or more, And a device for preventing complete discharge of the portable device, wherein the portable device is detached from the charging device or a new battery is inserted. The method of claim 3, wherein for a predetermined time or more, And a portable device comprising a fixed device and a portable device, wherein the portable device is detached from a charging device or a new battery is inserted.

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