JP3262840B2 - Composite terminal device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a composite terminal device,
In particular, the present invention relates to a composite terminal device having a function as a G3 facsimile machine and a function as an output printer of a host machine (computer).

[0002]

2. Description of the Related Art In recent years, there is a strong need to connect a facsimile terminal device to a personal computer, a word processor, or the like and use it as a printer function, and some devices having the same concept have been proposed. Generally, the standard of the scanning line density (resolution) of the G3 facsimile mode is 8 lines / mm of main scanning.
× sub-scanning 7.7 lines / mm (or 3.85 lines / mm or 15.4 lines / mm), and the vertical and horizontal line density is not 1: 1 (main scanning 8 lines / mm × sub-scanning 7. 80:77 for 7 lines / mm).

On the other hand, the line density of an image output from a computer to a printer differs depending on the model, but the ratio of the vertical and horizontal resolutions is generally 1: 1. Therefore, when computer data is recorded by the recording and driving system for the G3 facsimile mode, there is a problem that an image becomes about 4% longer vertically. The following (1) to (3) are known as means for solving this. (1) An apparatus for recording by thinning out sub-scanning lines. In addition,
As an LSI for thinning-out interpolation, for example, Fujitsu Giho Fi
The "resolution converter" described in No. 1.9, No. 4, 1991 is known. (2) A device that changes the paper feed amount by switching a mechanical drive system (gear ratio or the like). (3) Having a recording unit for the electrophotographic process,
An apparatus having a page recording memory. In this device,
In order to print one page at a constant speed, it is possible to cope with a difference in resolution by switching the drive speed of the print transport system in communication units (for example, switching the control frequency of a drive servomotor).

[0004]

However, these conventional composite terminal devices have the following problems. That is, an apparatus for recording by thinning out the sub-scanning lines has a disadvantage that the image quality near the thinned lines is deteriorated. In a device for changing the paper feed amount by switching a mechanical drive system (gear ratio, etc.),
There are problems that the mechanism is complicated, reliability is reduced, and cost is increased. Further, the addition of a bit image recording memory of one or more pages has a problem that it becomes very expensive for a relatively inexpensive thermal transfer type facsimile apparatus using a thermal head, for example.

Accordingly, the present invention provides a stepping motor drive trigger signal for recording paper conveyance whose frequency is different when recording received data in the G3 facsimile mode and when recording input data from the host machine. As different,
It is an object of the present invention to provide a composite terminal device that can solve the above-mentioned problems by setting.

[0006]

According to the first aspect of the present invention,
In order to solve the above problems, a facsimile recording means for recording received data in a G3 facsimile mode having different resolutions in main scanning and sub scanning, and input data having the same resolution in main scanning and sub scanning from a host machine. an input data recording means for recording, in a composite terminal and a step motor for driving to convey the recording sheet in the recording position, the trigger signal generating means for generating a driving trigger signal for the step motor, G3 facsimile mode And trigger signal setting means for setting a drive trigger signal generated from the trigger signal generating means such that the frequencies are different from each other, in a case where the received data is recorded and in a case where the input data from the host device is recorded. It is characterized by having provided.

[0007] According to a second aspect of the invention, for solving the above problems, according addition to the configuration of claim 1, the recording sheet conveying amount of one step by step motor as the sub-scanning resolution standard G3 facsimile mode 7. A recording paper conveyance amount setting means for setting the number to be a multiple of 7 lines / mm is provided.
The trigger signal setting means sets a signal synchronized with recording of one line of received data as a drive trigger signal during G3 facsimile mode recording, and a drive trigger during G3 facsimile mode recording during input data recording from the host machine. A signal having a frequency of 77/80 of the signal is set as a drive trigger signal.

According to a third aspect of the present invention, in order to solve the above problem, in addition to the configuration of the first aspect, the memory device has a memory area for at least 80 lines of bit image data and stores the received data and the input data. it memory means capable of, and control means for controlling the output speed of data outputted recorded from the data amount and the storage means to be stored in the storage means, the recording sheet conveying amount of one step by step motor G3 Set to be a multiple of 7.7 lines / mm as the standard for sub-scanning resolution in facsimile mode
And a control unit that stores and outputs data so that the storage unit functions as a buffer memory for synchronizing output recording of one line of received data and a drive trigger signal during G3 facsimile mode recording. The trigger signal setting means sets a drive trigger signal synchronized with the recording speed of one line of data output and recorded from the storage means, and when input data from the host machine is recorded, 80% of the input data is recorded. Control means so that the data is output and recorded from the storage means at the same speed as the recording speed at the time of the G3 facsimile mode recording every time data of 80 lines is accumulated in the storage means temporarily and sequentially. Controls the data storage / output, and the trigger signal setting means controls the drive trigger during G3 facsimile mode recording. A signal having a frequency of 77/80 of the moth signal is set as a drive trigger signal.

According to a fourth aspect of the present invention, in order to solve the above-mentioned problem, in addition to the configuration of the third aspect, when recording input data from the host machine, the number of pulses for driving the step motor by a drive trigger signal is counted. It is characterized in that pulse number counting means is provided. According to a fifth aspect of the present invention, in order to solve the above problem, in addition to the configuration of the fourth aspect, at the time of recording input data from the host machine, all data of 80 lines or less of the last page is stored in the storage means and output. The control means controls the data storage / output so that the data is recorded, and the trigger signal setting means controls the pulse number counting means so that the step motor is driven by the number of steps corresponding to the data amount of the last page. It is characterized in that a drive trigger signal for the last page is set based on the counting result.

According to a sixth aspect of the present invention, in order to solve the above-mentioned problem, in addition to the configuration of the first aspect, the step motor conveys the recording paper to a recording position and discharges the recording paper after the recording. . According to a seventh aspect of the present invention, in order to solve the above-mentioned problems , any one of the third to fifth aspects is provided.
In addition to the configuration described above, storage means capable of storing the reception data and input data, and data connected to the control means and storage means via a bus and connected to a line, and transmitted to the line Encoding means for encoding is provided, and the control means selects either to output and record the input data from the host device stored in the storage means, or to transmit the data to the line through the encoding means. It is characterized by being able to.

According to an eighth aspect of the present invention, in order to solve the above-mentioned problems, in addition to the configuration of the seventh aspect, when transmission of input data from the host machine is selected, the control means controls the sub-scanning of the data. Either one line can be thinned out for each line, or no thinning can be selected. If no thinning is selected, the control means sends a sub-scanning line density of 8 to the receiving side. It is characterized in that a code for declaring that the number is book / mm is transmitted.

[0012]

According to the first aspect of the present invention, the drive trigger signals of the stepping motor for transporting the recording paper are mutually different when recording the reception data in the G3 facsimile mode and when recording the input data from the host machine. Are set to be different. According to the second aspect of the present invention, in addition to the function of the first aspect, a signal synchronized with recording of one line of received data is set as a drive trigger signal during G3 facsimile mode recording, and at the time of recording input data from the host machine,
Drive trigger signal 77 during G3 facsimile mode recording
A signal having a frequency of / 80 is set as a drive trigger signal.

According to the third aspect of the present invention, in addition to the function of the first aspect, at the time of the G3 facsimile mode recording, the storage means functions as a buffer memory for synchronizing the output recording of one line of received data and the drive trigger signal, and the storage means. A drive trigger signal synchronized with the recording speed of one line of data output and recorded from the means is set. When recording input data from the host machine, data for 80 lines of the input data is temporarily stored in the storage means sequentially. Every time data for 80 lines is accumulated, data is output and recorded from the storage means at the same speed as the recording speed during G3 facsimile mode recording, and becomes 77/80 of the drive trigger signal during G3 facsimile mode recording. The frequency signal is set as the drive trigger signal.

According to a fourth aspect of the present invention, in addition to the operation of the third aspect, the number of pulses for driving the step motor is counted by the drive trigger signal when recording input data from the host machine. According to the fifth aspect of the present invention, in addition to the operation of the fourth aspect, when input data from the host machine is recorded, all data of 80 lines or less of the last page is stored in the storage means and output and recorded. The step motor is driven by the number of steps corresponding to the data amount of the page.

According to a sixth aspect of the present invention, in addition to the operation of the first aspect, the stepping motor conveys the recording sheet to a recording position, and discharges the recording sheet after recording. In the invention according to claim 7,
In addition to the function according to any one of claims 3 to 5 ,
It becomes possible to select any of output and recording of input data from the host device stored in the storage means and transmission of the input data to the line through the encoding means.

According to an eighth aspect of the present invention, in addition to the operation of the seventh aspect, when transmission of input data from the host device is selected, one line is thinned out for 27 lines of sub-scanning of data, and Either non-thinning can be selected, and if no thinning is selected, a code declaring that the sub-scanning line density is 8 lines / mm is sent to the receiving side.

[0017]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below with reference to the drawings. FIG. 1 to FIG. 3 are views showing an embodiment of the multifunction terminal according to the present invention. First, the configuration will be described. In FIG. 1, reference numeral 1 denotes a CPU (Central Proc) comprising a microcomputer or the like.
essing Unit), 2 is ROM (Read Only Memory), 3
Is a RAM (Randam Access Memory), 4 is an operation unit, 5 is an NCU (line control unit), 6 is a modem, 7 is a data compression /
Decompression unit (encoding / decoding unit) (DCR), 8 is an image processing unit, 9 is a scanner, 10 is a printhead driver, 11 is a printhead, 12 is a step pulse generator, 13 is a motor driver, and 14 is a buffer. A memory, 15 is a printer I / F (interface), 16 is a stepping motor for a reading unit, 17 is a stepping motor for a recording unit, and 18 is a bus (BUS). Including. Reference numeral 31 denotes a host machine (computer), and 32 denotes an exchange.

The composite terminal device 20 has different resolutions for the main scanning and the sub-scanning (in this embodiment, the main scanning resolution is eight lines /
mm, and the facsimile recording means for recording received data in the G3 facsimile mode having the sub-scanning resolution of 7.7 lines / mm, and the main scanning and sub-scanning from the host machine 31 have the same resolution (in this embodiment, input data to the scanning resolution and the sub-scanning resolution is recorded input data together eight / mm)
To convey the data recording means, the recording sheet in the recording position
This is a composite terminal device having a step motor 17 to be driven .

Here, the step pulse generator 12 constitutes a trigger signal generator, and generates a drive trigger signal for the step motor 17. Further, the CPU 1 constitutes a trigger signal setting means, and generates a step pulse when recording received data in the G3 facsimile mode and when recording input data from the host machine 31 (hereinafter also referred to as printer mode). The drive trigger signal emitted from the unit 12 is
Set so that the frequencies are different from each other.

CPU 1 constituting recording paper conveyance amount setting means
Is the recording paper transport amount in one step by the step motor 17
Is set to be a multiple of 7.7 lines / mm as a sub-scanning resolution standard in the G3 facsimile mode. The buffer memory 14 includes a facsimile storage unit and input data.
The data recording means has a memory area for at least 80 lines of bit image data, and can store received data and input data. The CPU 1 also serves as control means, and controls the amount of data stored in the buffer memory 14 and the output speed of data output and recorded from the buffer memory 14.

At the time of the G3 facsimile mode recording, the CPU 1 controls data storage / output so that the buffer memory 14 functions as a buffer memory for synchronizing output recording of one line of received data with a drive trigger signal. At the same time, the CPU 1 sets a drive trigger signal synchronized with the recording speed of one line of data output and recorded from the buffer memory 14.

When recording input data from the host machine 31,
Of the input data, data for 80 lines is temporarily stored in the buffer memory 14 sequentially, and every time data for 80 lines is stored, data from the buffer memory 14 is output at the same speed as that in the G3 facsimile mode recording. The CPU 1 controls data storage / output so that the output is recorded. At the same time, the CPU 1 sets a signal having a frequency that is 77/80 of the drive trigger signal during the G3 facsimile mode recording as the drive trigger signal.

When receiving the G3 facsimile mode, the received data is transferred from the exchange 32 to the recording head driver 10 and the recording head 11 via the NCU 5, modem 6, compression / decompression unit (DCR) 7, and buffer memory 14. At the same time, a drive trigger signal (step pulse) synchronized with the recording speed of each line of the head is output from the step pulse generator 12 to the motor driver 13, and the step motor 17 is driven.
These transfers and controls conform to the ordinary microcomputer control in which the CPU 1, the ROM 2, and the RAM 3 control the bus and the port.

When recording input data from the host machine 31, a print start command from the host machine 31 is sent to the printer I / F 15
Informs the CPU 1 through the receiver BUS18. The connection between the host device 31 and the BUS 18 can be usually realized by an element having a function conforming to the SCSI standard. The printer I / F 15 has a function of developing a character code from the host machine 31 into a bit image or combining bit image data and character data. The pixel density is 8 lines / mm for both main scanning and sub-scanning.
To generate bit image data.

FIG. 2 shows the relationship between recording and motor drive pulses during G3 facsimile mode recording, and the relationship between recording and motor drive pulses during input data recording from the host machine 31. At the time of G3 facsimile mode recording, the recording and the motor drive pulse are synchronized in the same phase, and at the time of input data recording from the host machine 31, at the start, it is the same as G3 facsimile mode recording, but the phase gradually shifts. . In the printer mode, when the next 80 lines can be continuously recorded at the end of the 80-line recording, the recording and the motor drive can be continued.

The CPU 1 also serves as a pulse counting means in addition to the trigger signal setting means and the control means, and counts the number of pulses for driving the step motor 17 by the drive trigger signal in the printer mode. Specifically, the CPU 1 counts by inputting a drive trigger signal as an interrupt signal of the CPU 1, the CPU 1 monitors the drive time, executes a calculation, and a counter for the signal is provided outside the CPU 1.
There is a way for 1 to see the counter value. Then, in the printer mode, the CP is set so that all data of 80 lines or less of the last page is stored in the storage means and output and recorded.
U1 controls data storage / output. At the same time, CPU
1 sets a drive trigger signal for the last page based on the counting result of the pulse number counting means so that the step motor 17 is driven by the number of steps corresponding to the data amount of the last page. At this time, when the number of pulses corresponding to the output recording data has a fraction with respect to the integer, the CPU 1 rounds up or down the fraction. Step motor 17
Not only transports the recording paper at the reading position,
It is also a motor for transporting and setting the recording paper to the recording position, and for discharging the recording paper outside the apparatus after recording.

Next, the operation will be described with reference to the flowchart of FIG. Incidentally, S ₁ to S ₁₀ in FIG. 3 indicate each step of the flowchart. In S _1, when the recording operation is started, in S _2, whether the sub-scanning resolution is 7.7 lines / mm is determined. If a sub-scanning resolution 7.7 present / mm, proceeds to S ₃ to determine the G3 facsimile mode,
If not 7.7 present / mm, it is determined that the printer mode, the process proceeds to S _5. In S _3, it is sequentially line data output recording, is output step driving pulse in synchronization with the time data is repeated until it is determined that the last page.

On the other hand, in S _5, the data of 80 lines starts accumulated in the buffer memory 14, the stored data S
If not the last page _6, at S _7, until the buffer memory 14 becomes full by 80 lines of data, stores the data. When the buffer memory becomes full with S _7, S ₈
In outputs record data 80 lines stored in the buffer memory 14, at the same time, step drive pulses at a frequency of 77/80 step drive pulses during G3 facsimile mode recording is output, and the last page in the S ₉ The above operation is repeated until it is determined. On the other hand, in S _6, if it is determined that the last page, in S _10, are outputs recording data (80 lines following the data) stored in the buffer memory 14, at the same time, steps during G3 facsimile mode recording A step drive pulse having a frequency of 77/80 of the drive pulse is output for the data to be recorded.

In the G3 facsimile mode, the sub-scanning resolution is recently 8 lines / mm (200 DP).
Some are set to I). The facsimile reception data having such a resolution can be recorded by the recording operation in the printer mode. As described above, in the present embodiment, the frequency of the drive trigger signal of the stepping motor 17 for recording paper conveyance can be changed between the G3 facsimile mode and the printer mode. Even if the scanning resolution is 1: 1, it is possible to record the original image as it is, that is, a square original image in a substantially square shape. Further, since sub-scanning lines are not thinned out, mechanical elements such as a gear ratio of a motor are not changed, or a memory having a recording capacity of one page or more is not provided, so that deterioration of image quality is prevented. , Simplification, reliability improvement, and cost reduction.

On the other hand, the image information created by the host machine 31 is
In response to a command from the host machine 31 or a command from the operation unit 4, the data can be transmitted from the buffer memory 14 via the BUS 18 to the line from the compression / decompression unit 7, the modem 6, and the NCU 5 in the same manner as facsimile data. Has become. That is, the buffer memory 14 stores the serial
The structure is such that data is transferred bidirectionally to the encoding and decoding blocks by the (direct memory access) method. When transmitting the input data from the host device 31, the CPU 1 performs a process of thinning out the transmission data by one line for 27 lines or not at the command of the host device 31 or the operation unit 4. The former is processing as G3 facsimile mode data so that the aspect ratio becomes equal to the original image, and the latter aims to prevent image deterioration of a portion due to thinning out more than the aspect ratio.

That is, the compression / expansion unit 7 constitutes an encoding means, is connected to the CPU 1 and the buffer memory 14 via the bus 18 and is also connected to a line, and encodes data transmitted to the line. is there. CPU1
The user can select either to output and record the input data from the host device 31 stored in the buffer memory 14 or to transmit the data to the line through the compression / decompression unit 7. Further, when the transmission of the input data from the host machine 31 is selected, the CPU 1 executes the data sub-scanning 27.
Either one line can be thinned out for the line, or no thinning can be selected. If not thinning is selected, the CPU 1 sends a code to the receiving side to declare that the sub-scanning line density is 8 lines / mm. This is for notifying the receiving side that the image is extended by about 4% with respect to the original image, and the NSF (Non-Standard Facilities) function of the G3 procedure of the CCITT recommendation can be used.

[0032]

According to the present invention, the frequency of the drive trigger signal of the stepping motor for recording paper conveyance can be changed between when recording in G3 facsimile mode and when recording input data from the host machine. It is possible to cope with a difference in resolution of recording data while preventing deterioration of image quality, simplifying the apparatus, improving reliability, and reducing cost.

[Brief description of the drawings]

FIG. 1 is a control block diagram showing an embodiment of a multifunction terminal according to the present invention.

FIG. 2 is a diagram for explaining the operation of the device shown in FIG. 1;

FIG. 3 is a diagram showing a control flow of the apparatus of FIG. 1;

[Explanation of symbols]

1 CPU (trigger signal setting means, control means, pulse counting means, recording paper conveyance amount setting means ) 7 Data compression / expansion section (encoding means) 12 Step pulse generation section (trigger signal generation means) 14 Buffer memory ( facsimile storage) Means, input data
Recording means ) 17 Step motor 31 Host machine

Claims (8)

(57) [Claims] 1. A facsimile recording means for recording received data in a G3 facsimile mode having different resolutions in main scanning and sub-scanning, and recording input data having the same resolution in main scanning and sub-scanning from a host machine. Input data
Recording means and a drive for conveying the recording paper at the recording position.
A composite terminal device having a step motor that moves, a trigger signal generating means for generating a drive trigger signal for the step motor, a case of recording G3 facsimile mode reception data, and a case of recording input data from a host machine. And a trigger signal setting means for setting a drive trigger signal generated by the trigger signal generation means so that the frequencies are different from each other. 2. The recording paper transport amount in one step by the step motor is set to be a multiple of 7.7 lines / mm as a standard of sub-scanning resolution in G3 facsimile mode.
Recording paper transport amount setting means for setting the signal , the trigger signal setting means sets a signal synchronized with recording of one line of received data as a drive trigger signal at the time of G3 facsimile mode recording, and at the time of recording input data from the host machine. 2. The composite terminal device according to claim 1, wherein a signal having a frequency of 77/80 of a drive trigger signal during G3 facsimile mode recording is set as the drive trigger signal. 3. A storage means having a memory area for at least 80 lines of bit image data and capable of storing the reception data and the input data, an amount of data stored in the storage means, and the storage means Control means for controlling the output speed of data recorded and output from the computer
And the recording in which the recording paper transport amount in one step by the step motor is set to be a multiple of 7.7 lines / mm as a sub-scanning resolution standard in the G3 facsimile mode.
Paper feed amount setting means, and in G3 facsimile mode recording, the control means controls data storage / output so that the storage means functions as a buffer memory for synchronizing output recording of one line of received data and a drive trigger signal. In addition, the trigger signal setting means sets a drive trigger signal synchronized with the recording speed of one line of data output and recorded from the storage means, and when recording input data from the host machine, data of 80 lines of the input data is recorded. Is temporarily stored in the storage means, and every time data for 80 lines is stored, the control means outputs and records the data from the storage means at the same speed as the recording speed in the G3 facsimile mode recording. And the trigger signal setting means controls the drive trigger signal during G3 facsimile mode recording. Compound terminal apparatus according to claim 1, wherein setting the frequency of the signal to be 77/80 as a drive trigger signal. 4. When recording input data from the host machine,
4. The composite terminal device according to claim 3, further comprising pulse number counting means for counting the number of pulses driving the step motor in accordance with the drive trigger signal. 5. When recording input data from the host machine,
The control means controls the storage / output of the data so that all the data of 80 lines or less of the last page are stored in the storage means and output and recorded, and the stepping motor is operated by the number of steps corresponding to the data amount of the last page. 5. The composite terminal device according to claim 4, wherein the trigger signal setting means sets the drive trigger signal of the last page based on the count result of the pulse number counting means so as to be driven. 6. The composite terminal device according to claim 1, wherein the step motor conveys the recording sheet to a recording position and discharges the recording sheet after recording. 7. A storage means capable of storing the received data and the input data, and a code connected to the control means and the storage means via a bus, connected to a line, and transmitted to the line. provided encoding means for reduction, the control means, the input data from the stored host machine be output stored in the storage means, and, selecting one of the be sent to the line through coding means 6. The method according to claim 3, wherein
A composite terminal device according to any one of the claims. 8. When the transmission of the input data from the host machine is selected, the control means selects one of thinning out one line for 27 lines of data sub-scanning and not thinning out one line. 8. The method according to claim 7, wherein when not skipping is selected, the control means sends a code declaring that the sub-scanning line density is 8 lines / mm to the receiving side. The composite terminal device according to claim 1.