JPH04274288A - Communication system - Google Patents

Abstract

PURPOSE:To reduce the extent of watt consumption in a system as a whole as well as to make output power in a power source reducible by reducing the extent of power for a display part at time of such a working condition when power is maximized. CONSTITUTION:After starting, whether a document is set to a document conveyor passage of a reading part 7 or not is detected by a document sensor, and if it is set aright, a document detecting signal is inputted into a central processing unit 1. When a start key is pushed, a start signal is inputted into the CPU 1, judging its connection to a circuit, and if there is no connection, the CPU 1 emits a copy-displaying command to a liquid-crystal panel, also emitting a turn-off command for a back-light 14 in addition. At this time, if it is an off-hook, transmitting operation takes place, whereby a recording part 6 of the reading part 7 works simultaneously, performing its copying operation. If a fact that watt consumption is in a state of being reduced is shown to the liquid-crystal panel display at time of this copying operation, such a display as 'back-light off' takes place for 'power-saving' sake.

Description

[Detailed description of the invention]

0001

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a communication device, and more particularly to a communication device that reduces power consumption of a display section only when the power consumption is at its maximum.

0002

2. Description of the Related Art Conventionally, communication devices, such as facsimile machines, have not been constructed to reduce the power consumption of the display unit when the device is in use, when the power consumption is at its maximum.

[0003] For example, in a facsimile communication device, power consumption is at its maximum during the copy mode in which the reading system and recording system operate simultaneously. was not configured.

0004

As described above, in the conventional example, there is a problem in that the cost of the power supply cannot be reduced because the power consumption is large when the power is used at the maximum.

[0005] This invention has been made to solve the above-mentioned problems, and reduces the power consumption of the entire system by reducing the power consumption of the display unit during the usage state where the power consumption is maximum. The purpose is to lower the output power of the power supply and reduce the cost of the power supply.

[0006]

[Means for Solving the Problem] Therefore, in claim 1 of the invention, the present invention is provided with a control means for controlling the power of the display unit to be reduced only when the power is approximately at its maximum. The purpose of the present invention is to achieve the above object by using a communication device consisting of the following.

[0007] Furthermore, in claim 2 of the present invention, the above object is achieved by the communication device according to claim 1, wherein the control means controls to reduce the power consumption of the display unit only during copying. .

[0008] Furthermore, in a third aspect of the present invention, the above object is achieved by the communication device according to the first aspect, which displays on the display unit that the power is reduced.

[0009] Furthermore, in a fourth aspect of the present invention, the above object is achieved by reducing the power consumption of the display section when the image reading operation and the image recording operation are performed in parallel.

0010

[Operation] In the communication device according to claim 1 of the present invention, the control means controls the communication device to
Controls to reduce power consumption of the display unit.

Further, in the communication device according to claim 2 of the present invention, the control means controls the power consumption of the display unit to be reduced only during copying.

[0012] Furthermore, in the communication device according to claim 3 of the present invention, in claim 1, the display unit displays that the power is reduced.

[0013] The communication device according to claim 4 of the present invention includes:
When the image reading operation and the image recording operation are performed in parallel, the power of the display section is reduced.

[0014]

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 of a communication device that is an embodiment of the present invention, and FIG. 2 is a flowchart for controlling the operation of this embodiment.

This embodiment will be explained using a facsimile machine as an example of a communication device. Reference numeral A denotes a control means, and the control means A is constituted by the CPU 1, and is a means for controlling the power of the display unit to be reduced only when the power is at a maximum in the usage state (details will be described later).

In FIG. 1, a CPU 1 is composed of a microprocessor, etc., and controls the entire facsimile machine F according to a program (not shown) stored in a ROM 2. 3 is RAM, RA
M3 stores the binary image data read by the reading unit 7 and the analog waveform input from the telephone line 10 via the NCU 9 and demodulated by the modem 8 as binary data. 4 is non-volatile RAM4, non-volatile R
AM4 reliably stores data to be saved even when the power of facsimile machine F is cut off. Further, CG5 is a ROM that stores characters such as JIS code and ASC11 code. 6 is a recording unit, and the recording unit 6 records and outputs the recording data stored in the RAM 3 as a hard copy.

Further, 7 is a reading section, and the reading section 7 is a CC
D is used to binarize the read data and sequentially send the binarized data to the RAM 3. Note that the loading state of the original in the reading section 7 is determined by the original sensor (not shown).
It is configured so that it can be detected by The original detection signal is input to CPU1.

Further, 8 is a modem, and the modem 8 is a CP
Based on the control of U1, the transmission data stored in RAM 3 is modulated and output to telephone line 10 via NCU 9. Furthermore, the modem 8 introduces an analog signal from the telephone line 10 via the NCU 9, demodulates it, and stores the binarized data in the RAM 3.

Further, the NCU 9 switches and connects the telephone line to either the modem 8 or the telephone 11 under the control of the CPU 1. Further, the telephone set 11 includes a handset, a speech network, a dialer, and the like.

Reference numeral 12 denotes an operation unit, and the operation unit 12 includes a key (not shown) for starting image transmission, reception, etc.
It consists of a mode selection key (not shown) for specifying an operation mode such as fine, standard, and automatic reception during transmission and reception, and a numeric keypad (not shown) for dial link. Note that the CPU 1 detects the pressed states of these keys and controls each of the above-mentioned parts according to the pressed states. Reference numeral 13 denotes a display section, and the display section 13 is composed of a liquid crystal display that displays 40 columns x 2 lines, and displays predetermined characters and the like under the control of the CPU 1.

Reference numeral 14 denotes a backlight, and the backlight 14 is composed of an LED (not shown), and the display section 1
3 operates under the control of the CPU 1 at the same time as displaying characters. The power consumption of this backlight 14 is 0.5W
That's about it.

Next, the operation of this embodiment will be explained using FIGS. 1 and 2. Normally, a communication device continues to operate in that state even when its power consumption is at its maximum. However, at this time, it is necessary to reduce the power consumption of the display section, that is, to reduce the power consumption of the backlight 1.
4 can be turned off, the power consumption of the entire system will be reduced a little, and it will be possible to use a power supply with a lower output power than a conventional power supply.

In this embodiment, power consumption in a communication device such as a facsimile is at its maximum when the reading system and recording system operate simultaneously in the copy mode, and at this time, the backlight 14 is turned off. This allows the CPU 1 to output a signal.

Next, the operation control of this embodiment will be explained using FIG. 2. FIG. 2 is a flowchart showing the operation of the CPU 1 in this embodiment. In FIG. 2, after starting, the document sensor detects whether or not the document is set in the document conveyance path of the reading section 7, and if it is set,
A document detection signal is input to CPU 1 (step S1). Then, when the start key is pressed, the start signal is CP
Input to U1 (step S2). After that, it is determined whether there is an off-hook connection, that is, a connection with the line (S2'). If there is no connection, the CPU 1 displays "
A command is issued to display "Copy," and then a command is issued to turn off the backlight 14 (steps S3 and S4).If off-hook, a transmission operation is performed.After this, the recording section 6 of the reading section 7 is activated at the same time. A copy operation is performed (step S5).

[0025] If the liquid crystal panel display during the copying operation is to indicate that the power consumption is being reduced, for example, a message such as "backlight off to save power" may be displayed. The backlight is turned off not only in a copy operation but also when an image reading operation for transmission and a recording operation of a received image are performed in parallel.

[0026]

[Effects of the Invention] As explained above, in this invention, the power consumption of the entire system is reduced by reducing the power consumption of the display section during the usage state where the power consumption is at its maximum. It becomes possible to lower the output power. Therefore, it is also possible to reduce the cost of the power supply.

[Brief explanation of the drawing]

[Fig. 1] A configuration diagram of a communication device that is an embodiment of the present invention.

[Figure 2] Flowchart for controlling the operation of this embodiment

[Explanation of symbols]

A Control means 1 CPU 6 Recording Department 7 Reading section 8 Modem 9 NCU 12 Operation section 13 Display section 14 Backlight

Claims (4)

[Claims] 1. A communication device comprising: a control means for controlling the power of the display unit to be reduced only in a usage state where the power is approximately at a maximum. 2. The communication device according to claim 1, wherein the control means controls the display unit to reduce power only during copying. 3. The communication device according to claim 1, wherein a display unit displays that the communication device is in a power reduction state. 4. A communication device characterized in that when an image reading operation and an image recording operation are performed in parallel, power of a display section is reduced.