JPH04113768A - Facsimile equipment - Google Patents

Abstract

PURPOSE:To prevent useless power consumption and to reduce power by providing a light source control means interrupting current supply to a light source lighting an original to the facsimile equipment when a storage memory of an information storage means is saturated, an idle area is lost and the reading of an original by an original read means is stopped. CONSTITUTION:When an idle area of a maximum compression code quantity or over by one line exists in a picture memory 11, since one-line scanning of an original 5 is started immediately by a scanner 7, a light source 8 is lighted. When a prescribed time elapses and the illuminance of an original face is made stable, one-line scanning by the scanner 7 is started and when data compression and transfer to the picture memory 11 are finished and an idle area by one succeeding one-line or over exists in the picture memory 11, the storage of the succeeding line is continued. When the transfer of the scanning data in the picture memory 11 is finished and an idle area by one line or over is not in existence in the picture memory 11, the storage of succeeding one-line is disabled and a signal representing the state turns off the light source 8.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention turns off the light source that illuminates the original when the storage memory of the information storage means is saturated and the reading of the original by the original reading means is stopped. The present invention relates to a facsimile machine that can reduce power consumption by cutting off the supply of excitation current to a stepping motor of a document feeding means.

[Summary of the Invention] The present invention provides a solution to the problem that the storage memory of the information storage means is saturated, that is, the free space is full due to the difference between the speed at which the document is read by the document reading means and the speed at which information is transmitted using a telephone line or the like. In the facsimile machine, the reading of the original by the original reading means is stopped when the original is exhausted, by providing a light source control means for turning off the light source for irradiating the original when the reading of the original is stopped. , When reading is stopped and there is no need to illuminate the original, the light source can be turned off to eliminate unnecessary power consumption.

The present invention also provides a speed at which a document is read by the document reading means;
When the storage memory of the information storage means becomes saturated, that is, there is no free space due to differences in information transmission speeds using telephone lines, etc., reading of the original by the original reading means is stopped. In this facsimile machine, by providing excitation current cutoff means for cutting off the supply of excitation current to the stepping motor of the document feeding means when reading of the document is stopped, when reading of the document does not need to be sent, the stepping motor is stopped. In addition to cutting off the excitation current to the motor and eliminating unnecessary power consumption,
This makes it possible to suppress heat generation in the stepping motor due to wasteful excitation current.

[Prior Art] A known facsimile device is one in which information read by a document reading device is stored in an information storage device, and the stored information is sent out by an information sending device using a telephone line or the like. .

In this type of facsimile machine, which has only a small capacity memory as an information storage means, there is generally a difference between the speed at which the original is read by the original reading means and the speed at which the information is sent out by the information sending means. When the storage memory of the information storage means becomes saturated, the reading of the original by the original reading means is temporarily stopped, and during this time, the information sending means continues to send out information, thereby creating an empty area in the storage memory. At this time, the reading of the original by the original reading means is restarted.

[Problems to be Solved by the Invention] In the above-mentioned conventional facsimile machine, even when the document reading means stops reading the document, the light source for irradiating the document remains on, and the document Since the excitation current continues to be supplied to the stepping motor of the feeding means, there is a problem in that not only is power was wasted, but also heat generated by the excitation current adversely affects the performance of the motor.

Furthermore, when a dry cell battery is used as a power source, there is a problem in that the operating time is shortened due to wasteful power consumption.

In the present invention, while the document feeding means stops reading the document,
By turning off the light source for irradiating the document and cutting off the supply of excitation current to the stepping motor of the document feeding means,
This is designed to solve the above-mentioned conventional problems.

Measures for solving the problem 2 (1) In a facsimile machine, the reading of the original by the original reading means is temporarily stopped when the storage memory of the information storage means becomes saturated, A light source control means is provided for turning off a light source for irradiating the original when the original reading means stops reading the original.

(2) In a facsimile machine that is configured to temporarily stop reading the original by the original reading means when the storage memory of the information storage means becomes saturated, the reading of the original by the original reading means stops. An excitation current cutoff means is provided to cut off the supply of excitation current to the stepping motor of the document feeding means when this happens.

[Function] (1) When the memory of the information storage means becomes saturated due to the difference between the reading speed of the original by the original reading means and the speed of sending out information by the information sending means, the light source control means is activated to illuminate the original. Turn off the light source.

(2) When the storage memory of the information storage means becomes saturated due to the difference between the reading speed of the original by the original reading means and the information sending speed of the information sending means, the excitation current cutoff means is activated and the original feeding means Cut off the supply of excitation current to the stepping motor.

[Embodiment] Next, a facsimile apparatus of the present invention will be explained with reference to the drawings.

FIG. 1 is a plot diagram of a facsimile device 1 according to the present invention. a scanner 7 and a scanner 1/F circuit 8 as an information reading means 6 for reading the information; a light source 9 such as an LED that illuminates the original 5 to enable the scanner 7 to read the original 5; A data compression circuit 10 as an information compression means for converting the information read by the means 6 into a compressed image code and compressing it; and a pedometer image memory as an information storage means for storing the data compressed by the data compression circuit 10. 11, a CPU 2, a RAM 13 for program control, a ROM 14 for storing programs, and a CCIT for modifying and demodulating the compressed image code.
It is equipped with a modem 15 for transmitting and receiving facsimile control procedure signals of T (International Telegraph and Telephone Advisory Committee) T. There is.

The scanner 1/F circuit 8 has a light source control means that turns off the light source 8 that illuminates the original 5 when the storage memory 11 becomes saturated and the scanner 7 stops reading the original. The function is also Scanner-1/
The F circuit 8 and the motor control circuit 4 include a memory 11.
It has a function as an excitation current cutoff means for cutting off the supply of excitation current to the stepping motor 3 when the scanner 7 reaches a saturated state and reading of the document by the scanner 7 stops.

Next, the operation of the facsimile machine having the above configuration will be described.

When the document 5 is set in a predetermined position and the switch is turned on, a constant speed step pulse is generated from the motor control circuit 4, the stepping motor 3 rotates, and the leading edge of the document 5 is sent to the reading position of the scanner 7. . In parallel with this, the modem 15 and NCU 16 are controlled to start the CCITT T.30 facsimile control procedure. At this time, the motor control circuit 4 is set to output a step pulse to the stepping motor 3 in synchronization with the activation signal from the scanner I/F circuit 8.

Then, when the data can be compressed, the scanner 1/F circuit 8 connects the light source 9. The scanner 7 controls the motor control circuit 4 to read the original 5 and outputs the raw data to the data compression circuit 10.

The data compression circuit 10 converts raw data into compressed code information using the MH, MR, or MMR compression method according to the CCITT T.4 recommendation. This compressed code information is transferred to the gait amount image memory 11 by the CPU 12 or the like. This transfer is performed until the image memory 11 becomes full, that is, saturated. When the image memory 11 reaches the saturated state, the operations of the data compression circuit 1° and the scanner I/F circuit 8 are temporarily stopped, and the reading of the original 5 and the raw data are stopped. Conversion to compressed code information and transfer to image memory 11 are stopped.

When the CCITT's T.3o sofa system control procedure reaches the phase C state, that is, the compressed code information transmission state, the compressed code information is transferred from the image memory 11 to the modem 15, and transmitted onto the telephone line via the NCU 16. As this transmission progresses and an empty area occurs in the image memory 11,
The operations of the data compression circuit 10 and scanner I/F circuit 8 are restarted.

When the end of the document 5 reaches the reading position of the scanner 7, the scanner 7 finishes reading the document 5.
Wait until the transmission of the compressed coat information remaining in the image memory 11 to the telephone line is completed.

When the transmission of the compressed code information is completed, the motor control circuit 4
A step pulse is generated at a constant speed from , generates a constant pulse.

In phase C, when the storage memory 11 becomes saturated and the scanner 7 stops reading the document, the scanner I/F circuit 8 as a light source control means sends a signal to the light source 9 based on the scanning timing of the scanner 7. The scanner I/F circuit 8 and motor control circuit 4 as excitation current cutoff means stop the supply of excitation current to the stepping motor 3 using a signal based on the scanning timing of the scanner 7. It has become.

Next, turning on and off the light source will be explained based on the operation timing diagram of FIG. 2.

If there is an empty area in the image memory 11 that is larger than the maximum compressed code amount for one line, the scanner 7 can immediately start scanning the document 5 for one line.
The light source 8 is turned on in response to a signal indicating the state (Fig. 2C
point). After that, when a certain period of time (light source setup time) has passed and the illuminance on the document surface has stabilized (point C in Figure 2), the scanner 7 starts scanning one line, compresses the data, and stores it in the image memory 11. When the transfer is completed, the empty area for the next one line or more will be available in image memory 1.
If it is at 1, it continues to accumulate the next line.

If the image memory 11 does not have an empty area for one line or more at the time when the transfer of the scanning data to the image memory 11 is completed, the accumulation of the next line becomes impossible, and a signal indicating this state is displayed. Turn off the light source 8 (point C in Figure 2).

In this way, the light source 8 is used only when necessary for scanning by the scanner 7.
This eliminates unnecessary power consumption.

In addition, the supply and cutoff of excitation current to the stepping motor 3 are also performed in the image memory 11 as shown in FIG. If there is an empty area equal to or greater than the maximum compressed code amount for 2 lines, the scanner 7 can immediately start scanning one line of the original 5, so the stepping motor 3 is activated by a signal indicating this state.
(point C in Figure 2). after that,
When the set-up time until the operation of the stepping motor 3 becomes stable has elapsed (point C in FIG. 2), the scanner 7 starts scanning the I-line and generates a drive pulse to the stepping motor 3.

If the image memory 11 has an empty area for the next line or more at the time when the compression storage and transfer of the scan data to the image memory 11 is completed, the storage of the next line is continued and the data is transferred to the stepping motor 3. Generate drive pulses.

If the image memory 11 does not have an empty area for the next one line or more at the time when the transfer of the scan data to the image memory 11 is completed, it becomes impossible to store the next one line.
A signal indicating this state is used to cut off the supply of excitation current to the stepping motor 3 (point C in FIG. 3).

In this way, by supplying excitation current to the stepping motor 3 and inputting drive pulses only when it is necessary for the scanning of the scanner 7, and by cutting off the excitation current when the scanning of the scanner 7 is unnecessary, unnecessary power consumption can be avoided. It eliminates

Although the embodiments have been described using a storage type scanner, the present invention can also be applied to other types of scanners.

[Effects of the Invention] Since the facsimile apparatus of the present invention has the configuration as described above, it has the following effects.

(1) When there is no free space in the storage memory and the document reading device such as a scanner stops reading the document,
It is possible to save power by turning off the light source that illuminates the document and preventing unnecessary power consumption.

(2) When there is no free space in the storage memory and the scanning of the document by a scanner or the like stops, the supply of excitation current to the stepping motor is cut off, which prevents wasted power consumption, and The heat generation of the motor can be reduced, and the maximum allowable current value of the stepping motor can be reduced.

Therefore, a small and inexpensive motor can be used, and a simple motor drive method can be applied.

(3) Since unnecessary power consumption is prevented, the operating time can be extended when dry batteries are used as the power source.

Furthermore, even if a walking capacity dry cell battery is used, the operating time is not shortened, so the storage space for the dry cell battery can be reduced.

[Brief explanation of the drawing]

FIG. 1 is a block diagram of a facsimile apparatus of the present invention, and FIG.
3 and 3 are operation timing diagrams. DESCRIPTION OF SYMBOLS 1...Facsimile machine, 3...Stepping motor, 4...Motor control circuit, 5...Document, 7...
Scanner, 8...Scanner-1/F circuit, 9...
light source.

Claims (2)

[Claims] (1) Light source control that cuts off the supply of current to the light source that illuminates the original when the storage memory of the information storage means becomes saturated and there is no empty space left, and the reading of the original by the original reading means stops. A facsimile device characterized by being provided with means. (2) Excitation current cutoff that cuts off the supply of excitation current to the stepping motor of the document feeding device when the storage memory of the information storage device becomes saturated and there is no empty space left, and the document reading device stops reading the document. A facsimile device characterized by being provided with means.