JPH0537682A - Picture receiver - Google Patents

Abstract

PURPOSE:To realize the picture receiver in which power consumption in the standby state is reduced. CONSTITUTION:A power supply section 1 supplying power to a facsimile equipment is divided into a main power supply section 3 able to supply large power to a major section 5 of a facsimile transceiver having a communication control section and a read recording function consuming large power and a sub power supply section 2 able to supply only small power to a main power supply section control circuit 6. A called signal inputted through a telephone line is detected by a frequency detection circuit 8 at the reception operation and a switch 4 provided between the main power supply section 3 and an external power supply is closed through the detection of the called signal to supply power to the main power supply section 3. Then the switch 4 is opened at the end of reception by the major section 5 of the facsimile transceiver to stop the power supply to the main power supply section.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an image receiving device which consumes less power during standby.

[0002]

2. Description of the Related Art Conventionally, an apparatus of this type has only a single power supply unit for supplying electric power to the entire apparatus, and even when a large amount of power is consumed for reading / recording or communication, it is small as in standby. Even when only power is consumed, it is usual to always start up the entire power supply device by connecting it to an external power supply.

[0003]

However, according to such a configuration, regardless of the amount of electric power required for the device to operate, all the power supply units are always connected to the external power supply and started up, so that the standby state is achieved. There was a problem that it consumes a lot of power.

The present invention has been made in view of the above problems, and an object of the present invention is to provide an image receiving apparatus that consumes less power during standby.

[0005]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, the present invention provides a power supply unit for supplying power to an apparatus, a communication control unit which consumes a large amount of power, and a facsimile transceiver unit having a recording function. Is divided into a main power supply unit capable of supplying power and a sub power supply unit capable of supplying only a small amount of power for supplying power to the main power supply control means, and detects a called signal input through a telephone line during a receiving operation. When the called signal is detected, the switch means provided between the main power source section and the external power source is closed to supply power to the main power source section, and when the reception at the facsimile transceiver section is completed, the switch means is opened. It has a configuration in which the supply of electric power to the power supply unit is stopped.

[0006]

According to the present invention, the power consumption in the standby mode can be reduced by the above-mentioned structure, and the facsimile transceiver unit can detect the called signal during the receiving operation and start the power supply to the facsimile transceiver unit. In this case, the initial operation of the communication control unit and the recording unit can be performed from the detection of the called signal to the start of the reception of the image information, which enables quick reception.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is a block diagram showing a schematic configuration of a facsimile transceiver showing an embodiment of the present invention. Reference numeral 1 denotes a power supply device, which is divided into a main power supply unit 3 and a sub power supply unit 2. Reference numeral 4 is a switch for starting and stopping the supply of electric power to the main power supply unit 3. Reference numeral 5 denotes a main part of a facsimile transceiver which is driven by the electric power supplied from the main power supply unit 1, and has a communication control function and a read / record drive function. Reference numeral 6 denotes a main power supply unit control circuit which operates by the power supplied by the sub power supply unit 2. The main power supply section control circuit 6 includes a frequency detection circuit 8 for detecting a called signal input via a telephone line, a document presence / absence detection sensor 7 provided at a document insertion port,
The AND gate circuit 9 and a set / reset flip-flop circuit (hereinafter, abbreviated as SRFF circuit) 10 whose output changes at the fall of an input signal are included. Both the output signal (b) of the frequency detection circuit 8 and the output signal (a) of the document presence / absence detection sensor 7 are input to the AND gate circuit 9. The output signal (C) of the AND gate circuit 9 is input to the S input terminal of the SRFF circuit 10. Further, a signal (d) indicating that communication is in progress, which is output from a communication control circuit (not shown) in the main part 5 of the facsimile transceiver, is also input to the R input terminal of the SRFF circuit 10. Of the SRFF circuit 10

[0008]

[Outer 1]

The signal (e) output from the output terminal is input to the switch 4, and when the signal (e) is at a high level, the switch 4 is in an open state, and conversely, the signal (e) is at a low level. At this time, the switch 4 is closed. Therefore, the SRFF circuit 10 operates so that the switch 4 is closed by the detection of the called signal or the transmission original, and the switch 4 is opened by the end of the communication.

The operation of the facsimile transceiver having the above configuration will be described below. First, when waiting,
The switch 4 is open. At this time, the output signals of the document presence / absence detection sensor 7 and the frequency detection circuit 8 (a)
And (b) are both high level. Therefore, the output signal (C) of the AND gate circuit 9 also becomes high level.

Next, the operation during transmission will be described with reference to FIG. FIG. 2 is a timing chart showing the input / output signals of each element of the main power supply unit control circuit 6 during transmission in this embodiment. At the time of transmission, the operator always puts the transmission original on the original table and inserts it in the original insertion port. At this time, the document presence / absence detection sensor 7 at the document insertion port detects the presence of the document, and the output signal (a) of the document presence / absence detection sensor 7 changes from the high level to the low level. At the same time, the output signal (C) of the AND gate circuit 9 also becomes low level. Then, the SRFF circuit 10 enters the set state at the falling point a of the signal (C) input to the S input terminal,

[0012]

[Outside 2]

The signal (e) output from the output terminal becomes low level. Therefore, the switch 4 is closed.
In this way, the power is supplied to the main power supply unit 3 only by setting the original. After being supplied to the main power supply unit 3,
There is a time lag before communication is started (signal (d) goes high) because communication is started for the first time by dialing after setting the original and pressing the send button. .. Then, when the transmission ends, the signal (d) indicating that communication is in progress changes from the high level to the low level. When the falling point b of this signal (d) is input to the R input terminal, the SRFF circuit 10 enters the reset state,

[0014]

[Outside 3]

The signal (e) output from the output terminal changes from low level to high level. As a result, the switch 4 is opened and the supply of electric power to the main power supply unit 3 is stopped. In this way, when the transmission is completed, the supply of power to the main power supply unit 3 is automatically stopped and the standby state is restored.
It should be noted that there is a time lag between the detection of the “absence” state of the document by the document presence / absence detection sensor 7 and the end of communication because the attachment position of the document presence / absence detection sensor 7 and the reading position of the document are usually separated from each other. This is because

Next, the operation during automatic reception will be described with reference to FIG. FIG. 3 is a timing chart showing the input / output signals of each element of the main power supply unit control circuit 6 during automatic reception in this embodiment. The automatic reception is to detect a called signal from the other party on the telephone, start supplying power to the main power supply unit 3, and automatically perform communication.
First, when the frequency detection circuit 8 detects a called signal from the other side, the output signal (b) changes from high level to low level. At the same time, the output signal (C) of the AND gate circuit 9 also changes from high level to low level. When the falling point c of this signal (c) arrives at the S input terminal, the SRFF circuit 10 enters the set state,

[0017]

[Outside 4]

The signal (e) output from the output terminal becomes low level. Therefore, the switch 4 is closed,
When the supply of electric power to the main power supply unit 3 is started, the main part 5 of the facsimile transceiver performs the initial operation of the communication control circuit, the recording unit and the like from the detection of the called signal to the start of the reception of the image information. When the main power supply unit 3 is supplied with power, the telephone line network control function in the main unit 5 of the facsimile transceiver operates to close the DC loop of the line and start communication. At this time, since the called signal disappears, the output signal (b) of the frequency detection circuit returns from low level to high level. Then, when the communication ends, the signal (d) indicating that the communication is in progress changes from the high level to the low level. When this falling point d arrives at the R input terminal of the SRFF circuit 10, the SRFF circuit 10 enters the reset state,

[0019]

[Outside 5]

The output signal (e) from the output terminal changes from low level to high level. Therefore, switch 4
Is opened, and the supply of electric power to the main power supply unit 3 is stopped. In this way, when the reception is completed, the supply of electric power to the main power supply unit 3 is automatically stopped and the standby state is restored.

[0021]

As is apparent from the above description, according to the present invention, a power supply section for supplying power to an apparatus is supplied to a communication control section that consumes a large amount of power and a facsimile transceiver section having a recording function. It is divided into a main power supply unit capable of supplying power to the main power supply control means and a sub power supply unit capable of supplying only a small amount of power for supplying power to the main power supply control means. Is detected, the switch means provided between the main power source section and the external power source is closed to supply power to the main power source section, and upon completion of reception in the facsimile transceiver section, the switch means is opened and the main power source section is opened. By adopting a configuration in which the power supply is stopped, the power consumption during standby can be reduced, and at the same time, the called signal is detected during reception and the facsimile transaction is detected. In order to start the power supply to the server unit, the facsimile transceiver unit can perform the initial operation of the communication control unit and the recording unit between the detection of the called signal and the start of the reception of the image information. Can handle.

[Brief description of drawings]

FIG. 1 is a block diagram showing a configuration of a facsimile transceiver showing an embodiment of the present invention.

FIG. 2 is a timing chart at the time of transmission of the main power supply control circuit of the facsimile transceiver showing the embodiment of the present invention.

FIG. 3 is a timing chart at the time of automatic reception of the main power supply control circuit of the facsimile transceiver showing the embodiment of the present invention.

[Explanation of reference numerals] 1 power supply device 2 sub power supply unit 3 main power supply unit 4 switch 5 main part of facsimile transceiver 6 main power supply unit control circuit 7 document presence detection sensor 8 frequency detection circuit 9 AND gate circuit 10 SRFF circuit

Claims (1)

Claim: What is claimed is: 1. A communication control unit that consumes a large amount of electronic power, a facsimile transceiver unit having a recording function and capable of automatic reception, and a main unit capable of supplying a large amount of power to the facsimile transceiver unit. A power supply unit, a switch means provided between the main power supply unit and an external power supply, a called signal detection means for detecting a called signal input through a telephone line, and the switch means for detecting the called signal. Main power supply control means for closing the switch means upon completion of reception in the facsimile transceiver section, and sub power supply capable of supplying only a small amount of power for supplying power to the main power supply control means. And an image receiving device including a unit.