JP3103400B2 - Wireless telephone equipment - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a radio telephone device such as a car telephone and a portable telephone device.

[0002]

2. Description of the Related Art Recently, wireless telephone devices have been widely used. In such a wireless telephone device, it is required to minimize power consumption for portability and to use the battery for a long time with a small battery. The circuit of each part of the wireless telephone device has been devised to reduce the power consumption. For example, an LCD (Liquid Crystal Display) used in this device to display various information to a user is as follows. There is something.

That is, when the standby time is longer than a predetermined time, or when there is no input from the keyboard for a predetermined time, the power supply of the LCD drive unit is turned off. Then, if there is a key input from the keyboard or an incoming call from the other party in this state, the power supply of the LCD drive unit is turned on again. In this way, it is possible to prevent the battery power from being consumed for unnecessary display when there is no change in the standby state for a long time.

However, in the case of the above configuration,
The power saving of the LCD control unit that controls the LCD drive unit is not considered, and a wireless telephone device that can further reduce the power consumption in consideration of the power saving of the LCD control unit has been desired.

[0005]

As described above, in the conventional wireless telephone device, the power saving of the LCD drive unit has been performed, but the power saving of the LCD control unit for controlling the LCD drive unit is considered. However, there has been a demand for a wireless telephone device capable of further reducing power consumption in consideration of power saving of the LCD control unit.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems, and has as its object to provide a wireless telephone device that can further save power.

[0007]

According to a first aspect of the present invention, there is provided a display for displaying various data,
A display driving means for driving the display, a display control means for transferring data for driving to the display driving means, and when there is no incoming call or key input for a first predetermined time, A first power supply interrupting means for interrupting the power supply of the display driving means; and a second call or key input after the power supply of the display driving means is interrupted.
A second power supply cutoff means for cutting off the power supply of the display control means when there is no predetermined time. The second invention is the wireless telephone device according to the first invention, wherein After the power supply to the
A wireless telephone device for resuming power supply of said display driving means when there is an incoming call or key input. In a third aspect of the present invention, in the first invention, said display driving means and said display control means are provided. The wireless telephone device restarts the power supply of the display drive means and the display control means when an incoming call or a key input is made after the supply of power is interrupted.

[0008]

In the radio telephone apparatus according to the present invention, when there is no incoming call or key input for a predetermined time, the power supply of the display driving means for driving the display is cut off. Also,
Further, if there is no incoming call or key input for a predetermined time after the power supply of the display driving means is cut off, the power supply of the display control means for transferring data to the display driving means is cut off. . Then, when there is an incoming call or key input, the supply of power to the display driving means and the display control means is restarted.

Therefore, it is possible to reduce the power consumption when waiting for a long time.

[0010]

Embodiments of the present invention will be described below with reference to the drawings.

FIGS. 1 and 2 are block diagrams showing the configuration of an embodiment in which the wireless telephone device of the present invention is applied to an automobile telephone device. FIG. 2 is a continuous diagram of FIG.

[0012] As shown in these figures, the automobile telephone apparatus 100 is composed of an antenna 200, a radio 300, and a telephone 400.

Here, the antenna 200 is mounted outside the vehicle, and the wireless device 300 is mounted in the trunk of the vehicle. The telephone 400 includes a telephone main body 400a and a handset 400b, and is mounted near a driver's seat in an automobile.

The radio device 300 forms a radio line 600 with a base station (not shown) via the antenna 200 to exchange signals, and an radio unit 310 for performing overall control of the entire device. A DIO / control unit 330, a removable RAM 350, an ID ROM 370 in which an ID number registered in a central office and a telephone number are stored, and the power of a battery mounted in a car are input and supplied to each unit of the device. The main part is comprised from the power supply part 390 which performs.

Radio section 310 includes demodulator 312, modulator 3
14, a power amplifier 316, a duplexer 318, and a synthesizer 320.

The demodulator 312 demodulates a signal received from the base station, which is input via the radio line 600, the antenna 200, and the duplexer 318. The reception signal includes an audible sound signal, a control signal, and the like.

The modulator 314 includes an audio / control unit 33
A signal such as an audible sound signal and a control signal output from 0 is modulated on a carrier.

Power amplifier 316 amplifies the transmission signal output from modulator 314.

The duplexer 318 converts the received signal input via the radio line 600 and the antenna 200 to the demodulator 31.
2 and the modulator 314 and the power amplifier 3
The transmission signal input through the antenna 16 is transmitted to the antenna 200.

The synthesizer 320 is a local oscillator for channel selection, and specifies a frequency to be restored by the demodulator 312 and a frequency to be modulated by the modulator 314.

The audio / control unit 330 is a CPU
1, oscillator / frequency divider 332, address decoder 333,
It comprises a ROM 334, a RAM 335, a radio section control section 336, an audio section 337, a control signal processing section 338, an audio section control section 339, a digital interface 340, a power section control section 341, and an interrupt controller 342. Is done. In the figure, reference numeral 343 denotes, for example, 8-bit data.
The tabus 344 is an address bus, and 345 is a control bus.

The CPU 331 controls the audio / control unit 330 as a whole.

The oscillator / frequency divider 332 supplies a clock to the CPU 331, divides the frequency of the clock and supplies it to each unit as a timing signal.

The address decoder 333 includes a CPU 331.
A predetermined signal is output to each section in response to a command signal from the device.

The ROM 334 stores various programs necessary for the operation of the CPU 331.

The RAM 335 stores various data during the processing of the CPU 331.

The radio section control section 336 controls the radio section 310 based on a command from the CPU 331. For example, the radio unit control unit 336 instructs the frequency to be designated by the synthesizer 320, the amplification factor to be amplified by the power amplifier 316, the modulation factor to be modulated by the modulator 314, and the like. Out-of-synchronization signal, an output detection signal output from the power amplifier 316, and the like are transmitted to the CPU 331.

The audio section 337 converts a control signal of the received signal demodulated by the demodulator 312 into a control signal processing section 33.
8 and the telephone 400, and the control signal processing unit 338
And an audible signal output from the telephone 400 to the modulator 314. The audio section 337 also has a function of shaping the waveform of the control signal sent to the control signal processing section 338 and filtering the control signal to be sent to the modulator 314.

The control signal processing unit 338 includes the audio unit 3
Bit synchronization and frame synchronization with the control signal output from 37 are taken, control data from the base station included in the control signal, which is a serial signal, is taken in as a parallel signal, and transmitted to the base station. The control data as a parallel signal to be transmitted is sent to the audio unit 337 as a control signal as a serial signal.

The audio section control section 339 performs various controls of the audio section 337. For example, the audio section control section 339 outputs a received signal from the audio section 337 to the control signal processing section 338, the switching control for sending the signal to the telephone 400, the control signal processing section 338, the voice dial section 350 or the telephone 400. The switching control for taking in any one of the transmission signals to the audio unit 337 is performed.

Digital interface 340 provides an interface between radio 300 and telephone 400.

The power supply control section 341 controls the power supply section 390. For example, the power supply control unit 341
Control is performed so that the voltage supplied from a battery (not shown) is set to a predetermined voltage by the battery 90 and supplied to each unit.

The interrupt controller 342 interrupts the CPU 331 in response to an interrupt command from each section.

The telephone body 400a comprises amplifiers 413, 4
14, hands-free controller 415, attenuator 415a, 4
15c, switches 416 and 417, a hands-free microphone 494, a speaker 492, a hook switch (not shown), and an ON / OFF switch (not shown).

The amplifier 413 amplifies the audio signal transmitted from the audio unit 337 of the wireless device 300 and amplifies the audio signal.
92.

The amplifier 414 is connected to the hands-free microphone 49.
4 amplifies the audio signal input by the
7

The hands-free control unit 415 includes the amplifier 41
In addition to controlling the attenuation rate of the attenuator 415a that attenuates the audio signal input to the amplifier 3, the attenuator 415c that attenuates the audio signal output from the amplifier 414 is controlled.

The switch 416 switches whether the audio signal transmitted from the audio section 337 is output from the speaker 492 or not.

The switch 417 is connected to the hands-free microphone 4
A switch is made as to whether or not the audio signal from 94 is sent to the audio section 337. Note that these switches 416, 4
Switching of 17 is performed by the audio / control unit 3 of the wireless device 300.
This is performed based on a control signal sent from the control unit 30.

A hook switch (not shown) detects on-hook or off-hook of handset 400b. The detected signal is sent to the audio / control unit 330 of the wireless unit 300.

An on / off switch (not shown) switches on / off of the entire mobile telephone apparatus 100, and this switching signal is sent to the power supply section 330 of the radio section 300.

The handset 400b includes a control unit 418,
Amplifiers 419a and 419c, switches 423 and 424,
Liquid crystal display 452, LCD driver 454, multiple keys
Key part 430 consisting of pads, handset microphone 49
6. It is composed of a handset receiver 498.

The control unit 418 performs overall control of the entire handset 400b based on a control signal transmitted from the audio / control unit 330 of the wireless device 300, and controls a control signal input from the key unit 430. Etc. wireless device 3
00 to the audio / control unit 330.

The amplifier 419a amplifies the audio signal transmitted from the audio section 337, and amplifies the audio signal.
98.

The amplifier 419c is connected to the handset microphone 4
Audio unit 33 amplifies the audio signal input from 96
7

The switch 423 switches whether or not the audio signal from the audio section 337 is output from the handset receiver 498.

The switch 424 is connected to the handset microphone 4
A switch is made as to whether or not to transmit the audio signal from the audio unit 96 to the audio unit 337. Note that these switches 423, 4
Switching of 24 is performed under the control of the control unit 418.

The liquid crystal display 452 includes a display unit for displaying several digits and a display unit for each function.

The LCD driver 454 drives the liquid crystal display 452 based on the control of the control unit 418 to perform a predetermined display.

The key section 430 includes numeric keys “0” to “9”, “*”, “#”, “SND”, “STO”, and “EN”.
D, RCL, FNC, CLR, EM
R, MUTE, TONE key
When the keypad is pressed, this is recognized by the control unit 418.

FIG. 3 is a block diagram showing the details and periphery of the LCD driver 454.

As shown in the figure, the LCD driver 454 includes an LCD control unit 501 and an LCD drive unit 502. The LCD control unit 501 transfers data to the LCD driving unit 502, and the LCD driving unit 502 transmits the data to the liquid crystal display 452.
Physically drive. The switch 503 turns on / off the supply of the voltage Vcc from the power supply unit 390 to the LCD control unit 501.
When turned off, the switch 504 turns on / off the supply of the voltage Vcc from the power supply unit 390 to the LCD drive unit 502. These switches 503 and 504 are controlled via a digital interface 340 according to instructions from the CPU.

Next, the operation of the above-structured mobile telephone apparatus will be described.

FIG. 4 is a flowchart showing the power supply operation of the LCD control unit 501 and the LCD drive unit 502 of the LCD driver 454 for the liquid crystal display.

First, when a main power switch (not shown) of the automobile telephone device is turned on, the CPU 331 starts an initial setting operation (step 601). Next, the power supply Vcc is supplied to the LCD control unit 501, and further initialization is performed (step 602). The initial settings are a function set, a display on / off control, an entry mode set, and a cursor home. Next, the voltage Vcc is also supplied to the LCD driving unit 502, and the liquid crystal display 452 is driven to blink only once to confirm power-on (step 603). Thereafter, until the main power switch is turned on (step 604), it is determined whether or not a call is in progress (step 605), whether or not there is an incoming call (step 606), and whether or not there is a key input. (Step 607), and whether or not no key input has continued for a predetermined time (step 608).
Is repeatedly performed. When it is confirmed that no key input has been continued for a predetermined time or longer, the switch 504 is pressed.
Is turned off, the power supply to the LCD drive unit 502 is cut off, the operation of the liquid crystal display 452 is stopped, and the power consumption of the entire device is reduced accordingly (step 609).

On the other hand, the LCD driving section 502
When the power supply voltage Vcc is not supplied to the LCD driver 502 (step 612) and the key operation for dialing is performed (step 613), the power supply to the LCD drive unit 502 is turned on. Voltage V
The supply of cc is restarted (step 615).

Power supply voltage Vcc for LCD drive section 502
In the state where the supply of the key has been interrupted, it is confirmed that there is no incoming call (step 612), and when it is confirmed that the state without key input has continued for a certain period of time (step 614), the switch 503 is turned off. The LCD control unit 5
01, the supply of the power supply voltage Vcc is cut off, and the power consumption of the entire apparatus is reduced accordingly (step 616). Thereafter, if there is no incoming call (step 618) or no key input is confirmed (step 619), the above operation is repeated.

On the other hand, in a state where the supply of the power supply voltage Vcc to the LCD control unit 501 is cut off, it is confirmed that there is an incoming call (step 618), and that there is a key operation for dialing (step 618). When the step 619) is performed, the power supply to the LCD control unit 501 is restarted, and the initialization is performed (step 620). Further L
The power supply to the CD drive unit 502 is also resumed (step 621), and there is no hindrance to dialing operation or confirming the telephone number of the other party.

In all cases, when the operation of turning off the main power switch is confirmed (steps 604, 610,
617), CPU 331, LCD controller 501, LCD
The power supply to all of the driving units 502 is cut off.

Therefore, in the above-structured automobile telephone apparatus, even if the main power switch is turned on, the power supply to the LCD drive unit 502 is automatically supplied when a certain time has elapsed without receiving a call or key input. If a certain period of time elapses without receiving a call or key input in that state, power supply to the LCD control unit 501 is also automatically cut off. Therefore, power consumption can be reduced.

Even when power is not supplied to the LCD control unit 501 and the LCD drive unit 502, if there is a key input from the key unit 430 or a call is received, these L signals are received.
The supply of power to the CD control unit 501 and the LCD drive unit 502 is restarted, so that there is no problem in dial transmission and the like.

[0062]

As described above, in the wireless telephone device of the present invention, the power supply of the display driving means for driving the display is performed when there is no incoming call or key input for a predetermined time. Will be shut off. Further, if there is no incoming call or key input for a predetermined time after the power supply of the display driving means is cut off, the power supply of the display control means for transferring data to the display driving means is cut off. Is done. Then, when there is an incoming call or key input, the supply of power to the display driving means and the display control means is restarted, so that it is possible to reduce the power consumption in a long waiting time or the like.

[Brief description of the drawings]

FIG. 1 is a block diagram showing a configuration of an automobile telephone device according to an embodiment of the present invention.

FIG. 2 is a block diagram showing a configuration of a car telephone device according to one embodiment of the present invention, which is a continuous diagram of FIG.

FIG. 3 is a diagram showing a configuration in an LCD driver and a peripheral configuration.

FIG. 4 is a flowchart showing the operation of the mobile telephone device according to one embodiment of the present invention.

[Explanation of symbols]

 331 CPU 340 Digital interface 390 Power supply 452 Liquid crystal display 454 LCD driver 501 LCD control 502 LCD drive 503, 504 Switch

──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int. Cl. ⁷ , DB name) H04B 7/26 H04M 1/00 H04Q 7/00

Claims (3)

(57) [Claims] A display for displaying various data; display driving means for driving the display; display control means for transferring data for driving to the display driving means; A first power supply cutoff unit for cutting off the power supply of the display drive unit when there is no call or key input for a first predetermined time; and after the power supply of the display drive unit is cut off, A wireless telephone device comprising: a second power supply cutoff unit that cuts off the power supply of the display control unit when there is no incoming call or key input for a second predetermined time. 2. The wireless telephone device according to claim 1, wherein after the power supply of said display driving means is cut off, the power supply of said display driving means is restarted when there is an incoming call or a key input. 3. The power supply of said display drive means and said display control means when a call or a key input is made after the power supply of said display drive means and said display control means is cut off. 2. The wireless telephone device according to claim 1, wherein the communication is restarted.