JPH05153375A - Facsimile controller - Google Patents

Abstract

PURPOSE:To convert the picture width of the picture information to the different types of facsimile equipment by setting variably the control information on the deletion width, the addition width and the effective width of the picture information on a register part through a microcomputer. CONSTITUTION:A picture information control unit 2 has an image reducing function in both main and secondary scanning directions and carries out the processing in a transmission mode and a copy mode only when a reduction command is set to a register 220 from an MPU. The reduction processing is carrier out in the main scanning direction by a picture information processing part 204. This reduction processing in applied to the read picture information train the a transmission mode and to the picture information train inputted a transmission mode and to the picture information train inputted from a line buffer control part in a copy mode respectively. Meanwhile the reduction processing is carried out in the secondary scanning direction by secondary scan reduction control circuit 219 and a picture width conversion control circuit 209. That is, the circuit 209 discontinues the transmission of a buffer enable signal S206 to one of seven lines of the picture information, for example, and reduces the image by one line in a transmission mode. In the copy mode, the circuit 209 performs a thinning operation in the same way.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a facsimile control device for controlling the flow of image information and paper feed in a facsimile device.

[0002]

2. Description of the Related Art Facsimile apparatuses differ in the structure of a sub-scanning (paper feed) mechanism of a recording unit and a reading unit, the type of step motor used therein, the reading speed and the recording speed, etc., depending on the model. Therefore, it is necessary to apply the control conditions for image information transfer between the line buffer control unit and the reading unit or the recording unit and the driving conditions for the step motor to each model.

In the conventional facsimile apparatus, the control circuit used for controlling the transfer of image information and the drive of the step motor is newly provided with a dedicated control circuit when developing a new model of the facsimile apparatus. The reality is that it is designed. Further, if the design of the reading unit or the recording unit is changed in the process of developing the model, the design of the control circuit is also changed at the same time.

[0004]

However, in the above-mentioned conventional configuration, the control circuit for controlling the transfer of image information and the drive of the step motor cannot easily change the control condition and lacks versatility, and the facsimile apparatus is provided. There was a problem that it hindered the reduction of development cost and the shortening of development period.
The present invention has been made to solve the above-mentioned conventional problems, and it is possible to arbitrarily set a control condition regarding an image width conversion width of image information by an external microcomputer.
It is an object of the present invention to provide a general-purpose facsimile control device that can be commonly applied to different types of facsimile devices.

[0005]

In order to achieve the above-mentioned object, the present invention provides a microcomputer provided in a facsimile apparatus for controlling transfer of image information, and deletion of image information set by this microcomputer. A register section for holding control information about the width, the additional width and the effective width, and an image width conversion control means for controlling the image width conversion of the image information based on the control information held in the register section,
Image information processing means for performing image width conversion processing of input image information according to the control of the image width conversion control means.

[0006]

According to the present invention, with the above-described structure, the control information relating to the deletion width, the addition width and the effective width of the image information in the register section can be variably set from the microcomputer, and the image information image width conversion can be performed for different types of facsimile machines. Processing can be performed.

[0007]

1 is a block diagram showing the overall construction of a facsimile control apparatus according to an embodiment of the present invention. In the figure, 1 is a clock control unit, 2 is an image information control unit, 3 is a counter control unit, and 4 is an interface control unit. All these units are interconnected by an internal bus S16.

The interface control unit 4 has a data bus S14 and an interface S15 for address and other control signals with an MPU (not shown) of the facsimile machine, and each of the other units 1, 2 through the internal bus S16. Data is read from and written into the register in 3 under the control of the MPU. It is also possible to directly connect the internal registers of the units 1, 2 and 3 to the data bus S14 and the interface S15 and control them directly from the MPU. In that case, the interface control unit 4 may be omitted. ..

A detailed block diagram of the clock control unit 1 is shown in FIG. In the figure, reference numeral 101 is an oscillation circuit for generating a signal S101 having a constant cycle determined by the natural frequency of the crystal oscillator 5. Reference numeral 102 denotes a frequency dividing circuit, which divides the signal S101 to generate a basic clock S1, a counting clock S7,
The internal clock S102 and the external clock S2 are generated. The external clock S2 is supplied to the MPU and its frequency dividing circuit. Reference numerals 103, 105 and 107 are registers controlled through the internal bus S16. 104 and 106 are counters,
Reference numerals 108 and 109 are selectors.

The counter 104 counts the internal clock S102 using the set value of the register 105 as an initial value and generates a constant speed step pulse S103. Therefore, register 1 on the MPU side
By changing the setting value of 05, the cycle of the constant speed step pulse S103 can be arbitrarily changed. Of the constant speed step pulse S103 and the variable speed step pulse S3 for reading input from the image information control unit 2, one specified by the control signal S105 output from the register 103 is selected by the selector 108, and the facsimile device Step pulse S5 for sub-scanning drive of the reading unit (not shown)
Is sent to the outside as. The other selector 109 is
One of the constant speed step pulse S103 and the variable speed step pulse S4 for recording input from the image information control unit 2 is selected according to the control signal S104 from the register 103, and the recording unit (not shown) of the facsimile apparatus is selected. ) Is sent to the outside as a step pulse S6 for driving the sub-scan. That is, the MPU can switch the step pulses S5 and S6 by controlling the set value of the register 103. The counter 106 generates an image information synchronization clock S8 to be supplied to the image information control unit 2 by counting the clock S9 input from the outside using the setting value of the register 107 as an initial value. The cycle of the image information synchronization clock S8 can also be controlled from the MPU side by setting the register 107.

A detailed block diagram of the image information control unit 2 is shown in FIG. In the figure, S10 is an interface with the reading unit, S11 is an interface with the recording unit, and S12 is a line buffer control unit of the facsimile apparatus.
It is an interface with (not shown).

Reference numerals 201, 202 and 203 denote interface control circuits for the reading section, the recording section and the line buffer control section, respectively. Image information is provided by these interface control circuits 20
It is given and received via 1,202,203.

Reference numeral 204 is an image information processing circuit, 207 is a delay recording control circuit, 209 is an image width conversion control circuit, 208 and 210 are counters, and 2
Reference numerals 12 and 213 are selectors, and 215 to 218 are registers. By the cooperation of these units, transfer of image information between the line buffer control unit and the reading unit or the recording unit is controlled, and through the control, response delay correction of recording operation, which will be described later,
The image report is reduced and the image width is converted in the main scanning direction. As parameters required for these processes, the response delay time, the deletion / addition width, and the effective width are set in the registers 216, 217, 218 from the internal bus S16. A circuit for generating a clock as described later and supplying it to a necessary part exists in the unit, but it is omitted in the figure.

205 is a variable speed step pulse generation control circuit, 206 is a counter, 211 is a selector, 214 is a register, 2
Reference numeral 19 is a sub-scanning reduction control circuit. These units generate variable speed step pulses S3 and S4 used for sub-scanning driving of the reading unit and the recording unit. Variable speed step pulse S3
The cycle of S4 is set in the register 215, and the stop waiting time (described later) is set in the register 214. The sub-scanning reduction control circuit 219
When the image is reduced in the sub-scanning direction, the variable speed step pulse S4 is thinned out.

It is necessary to switch the method of controlling the transfer of image information and the method of controlling the generation timing of the variable speed step pulses S3 and S4 depending on the operation mode (reception, transmission, copy) of the facsimile apparatus. A register 220 is provided for setting control information (including information for instructing reduction, which will be described later) according to this operation mode from the MPU, and the contents set therein are the signal pulse S220. After that, each of the above circuits 204, 205, 207, 209, 2
Given to 19. The register 220 is connected to the internal bus S16 and can be controlled by the MPU.

FIG. 4 is a block diagram showing a detailed configuration of the counter control unit 3. 302 is a selector and 303 is a counter. 301 is a register for controlling the selector 302 and the counter 303, and 304 and 305 are registers for setting an initial value of the counter 303. Reference numerals 306 and 307 are registers for reading the count value of the counter 303 into the MPU. These registers 301, 304 to 307 are connected to the internal bus S16,
It can be controlled from the MPU.

The selector 302 selects one of the reading step pulse S5, the recording step pulse S6, and the counting clock S7 according to the designation from the register 301, and inputs it to the counter 303. When started by the register 301, the counter 303 counts the output of the selector 302 with the values of the registers 304 and 305 as initial values. The carry signal S13 is sent to the MPU as an interrupt signal.

Next, the operation of the facsimile controller will be described in detail in the order of the transmission mode, the reception mode and the copy mode.

First, the transmission mode will be described. In this mode, when the input ready signal on the interface S12 is turned on from the line buffer control unit, the interface control circuit 203 activates the circuits 205 and 209 by the signal on the signal path S201 (the delay recording control circuit 207 Do not start). In the image information processing circuit 204, since the transmission mode is designated by the signal path S220, the read image information on the signal path S203 is synchronized with the clock internally generated based on the image information synchronization clock input from the reading unit. Is taken in and output to the signal path S205. Signal path S205
The above image information is transferred from the interface control circuit 203 to the interface S12 with the line buffer control section.

When the read enable signal S202 from the interface control circuit 201 is turned on, the image width conversion control circuit 209 causes the selector 213 to select the register 217 and starts the counting operation of the counter 210. The counter 210 uses the register 217 as an initial value to count the number of clocks internally generated from the image information synchronization clock from the reading unit, and outputs a carry signal when the full count is reached. When this carry signal is output, the width conversion control circuit 209 causes the signal path S2
At the same time when the buffer input enable signal on 06 is turned on, the sector 213 is switched to the register 218 side. counter
After reset, 210 counts with the set value of the register 218 as an initial value this time, and outputs a carry signal when the full count is reached. When this carry signal is output, the image width conversion control circuit 209 turns off the buffer input enable signal,
Stop the counter 210. Even when the read enable signal S202 for the next line is turned on, if it does not appear on the start prohibition signal path S201 such as busy of the line buffer control unit, the image width conversion control circuit 209 outputs the same buffer input enable signal as described above. Take control. In this way, the read image information is transferred line by line to the line buffer controller.

On the other hand, a variable speed step pulse generation control circuit
When the read enable signal S202 is turned on, 205 activates the counter 206 with the selector 211 selecting the register 215. The counter 206 uses the value of the register 215 as an initial value and counts a clock (not shown) internally generated based on the reference clock S1. When the carry signal is output from the counter 206, the variable speed step generation control circuit 205 outputs one pulse S204 and stops the counter 206. For the next line, the same operation is performed when the read enable signal S202 is turned on, but the signal path S2
It does not operate when the start prohibition signal is output on 01. The pulse S204 is output to the outside as a reading variable speed step pulse S3 through the sub-scanning reduction control circuit 219.

It should be noted that the clock control unit 1 waits until the paper is fed to the reading start position in the reading unit and is performed.
The selector 108 in the counter controls the selector 30 in the counter control unit 3 so as to select the constant speed step pulse S103.
2 is controlled by the MPU via the registers 103 and 301 so as to select the reading step pulse S5. Therefore, the counter 303 counts the constant speed step pulse S103. During this time, the operations of the image width conversion control circuit 209 and the variable speed step pulse generation control circuit 205 are suppressed by the MPU via the register 220. When a predetermined time (set in the registers 304 and 305) elapses and the paper is fed to the reading start position, the Curie signal S13 is output from the counter 303 and the MPU is interrupted. When the MPU receives this interrupt, each of the above circuits 20 is sent through the register 220.
At the same time as releasing the suppression of 5,209, the selector 108 is switched to the variable speed step pulse S3 side through the register 103. Further, the MPU resets the registers 304 and 305 in order to monitor the end of reading, and causes the counter 303 to count the reading step pulse S5. When it is interrupted by the carry signal S13, the MPU judges that the reading of one page is completed and stops the above-mentioned transmission operation. In the middle of the process, the MPU can read the count value of the counter 303 through the registers 306 and 307 to know the progress of the read operation.

Next, the operation in the reception mode will be described. When the output ready signal of the interface S12 of the line buffer control unit is turned on, the interface control circuit 203 activates each circuit 205, 207, 209 through the signal path S201.

Variable speed step pulse generation control circuit 205
Immediately sends out one pulse S207 and causes the selector 211 to start the counting operation of the counter 206 with the register 215 selected. The counter 206 counts the clock generated from the basic clock S1 as the set value of the register 215. Variable speed step pulse generation control circuit 205
Sends out one pulse S207 each time a carry signal is output from the counter 206, and when the number of pulses 207 sent reaches a predetermined number, switches the selector 211 to the register 215 side from the time when the carry signal is output from the counter 206. .. afterwards,
The signal S221 is turned on until the carry signal is output from the counter 206, and the output of the signal S208 from the delay recording control circuit 207 is suppressed. When the carry signal is output from the counter 206, the variable speed step pulse generation control circuit 205 turns off the signal S221 and stops the counter 206. The pulse 207 is transmitted as a recording variable speed step pulse S4.

The delay recording control circuit 207 is
The counting of the counter 208 is started with the selector 212 switched to the register 216 side. Counter 208 has register 21
A clock (not shown) internally generated from the image information synchronization clock S8 is counted with the set value of 6 as an initial value, and when the full count is reached, a carry signal is output. The delay recording control circuit 207 switches the selector 212 to the register 215 side by the first carry signal of the counter 208, and outputs the signal S208 every time the carry signal is output. However,
When the signal S211 is turned on, the counter 208 is stopped, and the signal S
Don't give 208.

When the signal 208 is output, the image width conversion control circuit 209 turns on the recording enable signal S211 and switches the selector 213 to the register 217 side to activate the counter 210. The counter 210 uses the value of the register 217 as an initial value and counts the same clocks as the counter 208. When a carry signal is output from the counter 210, the image width conversion control circuit 209 turns on the buffer output enable signal on the signal path S206 and, at the same time, switches the selector 213 to the register 218 side. The counter 210 starts the counting operation with the set value of the register 218 as an initial value. When the next carry signal is output, the image width conversion control circuit 209 turns off the buffer output enable signal (S206) and switches the selector 213 to the register 217. After that, when a carry signal is output from the counter 210, the image width conversion control circuit 209 causes the recording enable signal S211.
Is turned off and the counter 210 is stopped at the same time. The buffer output enable signal on the signal path S206 is transmitted to the line buffer control unit through the interface S12, and the image information for one line is input from the interface S12 during the ON period of the signal. This image information is sent from the interface control circuit 203 through the signal path S209 to the image information processing circuit.
Sent to 204.

The image information processing circuit 204 takes in the image information on the signal path S209 in synchronism with the internally generated clock from the image information synchronizing clock S8, and takes it in the signal path S2.
Output to 10. The interface control circuit 210 outputs the recording enable signal S211 and image information (S210) to the recording interface S11.

The MPU controls the selector 109 through the register 103 at the constant speed step pulse S at the start of the receiving operation.
After switching to the 103 side and setting the registers 304 and 305,
The selector 302 selects the recording step pulse S6 through the register 301 to activate the counter 303, and the register 220 causes the circuits 205 and 20 in the image information control unit 2 to operate.
Stop 7,209. When the recording unit feeds the paper to the recording start position, the carry signal S13 of the counter 303 is sent.
Occurs and the MPU is interrupted. The MPU switches the selector 109 to the variable speed step pulse S4 side through the registers 103 and 220, and enables each circuit 205, 207, 209 in the image information control unit 2. Also M
The PU resets the registers 304 and 305 and restarts the counter 303 through the register 301. When the recording of one page is completed, the carry signal S13 is interrupted and M
The PU is notified. On the way, the MPU can read the value of the counter 303 by the registers 306 and 307 as needed and monitor the progress of the receiving operation.

Next, the operation in the copy mode will be described. The copy mode is executed on a line-by-line basis by a combination of a transmission operation and a reception operation.

That is, the read enable from the reading unit S20
2 as it is signal path S206, interface control circuit
It is sent to the line buffer controller through 203 and the interface S12. The read image information is sent to the line buffer control unit through the signal path S203, the image information processing circuit 204, the signal path S205, the interface control circuit 203, and the interface S12.

On the other hand, when the output ready signal from the line buffer control unit is turned on and the interface control circuit 203 activates the signal path S201, the variable speed step pulse generation control circuit 205 and the image width conversion control circuit 209 receive the above-mentioned reception. Works like mode. However, the variable speed step pulse generation control circuit 205 does not select the register 214, and simultaneously sends the periodic pulses S204 and S207 determined by the selector 215. The image information output from the line buffer control includes the interface S12, the interface control circuit 203,
Signal path S219, image information processing circuit 204, signal path S210,
Interface control circuit 202, interface S11
Is sent to the recording section for recording.

The MPU selects the selector at the start of the copy operation.
108 and 109 are switched to the constant speed step pulse S103 side, and the counter control circuit 3 is controlled similarly to the start of the operation in the transmission mode (or the reception mode). When the carry signal S13 is generated at the end of reading one line, the MPU switches the input selection of the selectors 108 and 109 and enables the circuits 205 and 209 of the image information control unit 2 to operate.
The subsequent control by the MPU is the same as in the case of the reception mode or the transmission mode described above.

The MPU, if necessary, uses a counter 303.
Can also be caused to count the counting clock S7.

The image width conversion processing in each of the above operation modes will be described with reference to the enable signal waveform diagram of FIG.

FIG. 5A shows an enable signal waveform diagram in the case of no processing, which corresponds to the case where the deletion / addition width is designated as 0 by the register 217 in the transmission mode, the reception mode and the copy mode. In transmit mode (and transmit operation in copy mode), i is the read enable signal S202, i
i corresponds to the buffer input enable signal (S206). α is the effective width specified by the register 218.
In the reception mode, i is the input enable signal (S206), i
i corresponds to the recording enable signal S211.

FIG. 5B is a waveform diagram of the enable signal in the case of reducing the image width, which corresponds to the transmission mode. iii is a read enable signal S202, and iv is a buffer output enable signal (S206). e is the deletion width specified by the register 217, and f is the effective width specified by the register 218.

FIG. 5C is a waveform diagram of the enable signal in the case of the image information adding process, which corresponds to the recording operation in the reception mode and the copy mode. v is an input enable signal (S206), and vi is a recording enable signal S211. g is an additional width specified by the register 217, and h is an effective width specified by the register 218.

In this way, the image width conversion processing is executed by controlling the enable signal. However, each enable signal is shown by ignoring the delay in the image information control unit 2, and strictly speaking, delay correction is performed.

Next, the sub-scanning control in the image information control unit 2 will be further described. FIG. 6 is an explanatory diagram of sub-scanning control for the printing unit.

In the figure, A is a step pulse for sub-scanning drive of the recording portion, and B is a response (displacement-time characteristic) of the sub-scanning drive system to the step pulse A. c is a recording enable signal.

As shown in the figure, the response of the sub-scanning drive system to the application of the step pulse A is delayed as shown by B. This response delay time differs depending on each sub-scan drive system.
Correction of this response delay is one of the sub-scanning control functions. That is, an appropriate response delay time is set in the register 21.
It is set at 6, and the supply opening of the recording enable signal c (S211 in FIG. 3) is delayed by the set time 1. By this timing correction, it is possible to make the arrangement of the recording dot rows of each line uniform as shown by D.

Further, a stop waiting time k is required until the sub-scanning drive system is completely stopped after the supply of the step pulse A is stopped, and if the recording is restarted during this time, the recording operation becomes unstable. Since this stop waiting time k also changes depending on the individual sub-scanning drive system, it is necessary to control the timing of the step pulse A and the recording enable signal c. The register 214 is set with this waiting time k,
The retransmission of the step pulse A is made to wait for the time set in the register 214 (obviously, the output of the enable signal is also made to wait).

Furthermore, it is necessary to control the period j of the step pulse A and the period m of the recording enable signal c according to the recording speed and the like. Register 215 sets this cycle.
The cycle of the step pulse A and the recording enable signal c is controlled according to the set value.

The image information control unit 2 has a function of reducing an image in both the main and sub scanning directions. The reduction processing is performed in the transmission mode and the copy mode only when the reduction instruction is set in the register 202 from the MPU.

The reduction processing in the main scanning direction is performed by the image information processing unit 204.
In the transmission mode, and for the image information sequence input from the line buffer controller in the copy mode.

The reduction in the sub-scanning direction is performed by the sub-scanning reduction control circuit.
219 and the image width conversion control circuit 209.

That is, in the transmission mode, the image width conversion control circuit 20 is applied to one line of, for example, seven lines of the read image information.
At 9, the transmission of the buffer input enable signal (S206) is stopped. As a result, the read image information is thinned out without being sent to the line buffer control unit by one line per seven lines. That is, one line is reduced in every 7 lines in the sub-scanning direction.

In the copy mode, when the read image information is transferred to the line buffer control unit, the image width conversion control circuit 209
Similar thinning is performed by. On the other hand, when the image information (reduced) input from the line buffer control unit is sent to the printing unit for printing, the sub-scanning reduction control circuit 219 sends the variable speed step pulse S4 for printing for one line per seven lines. stop. In this way, the reduction in the sub-scanning direction in the copy mode is executed.

As described above in detail, according to the present embodiment, the period and timing of the step pulse, and the transfer of the image information between the reading unit and the recording unit and the line buffer control unit are set by the register setting from the MPU. The control method can be arbitrarily changed. In addition, the transfer rate of the image information from the line buffer control unit to the recording unit is also determined by the image information synchronization clock (S
It can be changed arbitrarily from the MPU by setting the cycle of 8). Since the synchronous clock of the read image information is generated based on the black input from the reading unit, the read image information can be transferred at a speed adapted to the reading speed of the reading unit.
Further, even if the cycle or timing of the step pulse is arbitrarily changed, the step pulse is counted by the counter, so that the paper feeding management of the recording unit and the reading unit and other time management for communication control can be performed without any trouble. be able to. Therefore, the facility control apparatus of the present embodiment can be commonly used for different types of facsimile machines and is extremely versatile. Further, the facsimile controller of this embodiment is M
It is possible to perform various image width conversion processing and reduction processing by register setting from the PU, and it is possible to deal with multifunctionalization of the facsimile apparatus.

The present invention is not limited to the structure of this embodiment, and it goes without saying that it can be implemented by appropriately modifying it. Further, the facsimile control apparatus according to the present invention can be realized by using a disk lead component, or can be realized as an integrated circuit of one chip or a plurality of chips.

[0051]

As is apparent from the above description, according to the present invention, the image information image width is set by setting the control information regarding the deletion width, the additional width and the effective width of the image information in the register section from the microcomputer. This has an excellent effect that a conversion process can be easily performed and a versatile facsimile control device that can be commonly applied to different types of facsimile devices can be provided.

[Brief description of drawings]

FIG. 1 is a block diagram showing the overall configuration of a facsimile control apparatus according to an embodiment of the present invention.

FIG. 2 is a block diagram showing a detailed configuration of a clock control unit in FIG.

FIG. 3 is a block diagram showing a detailed configuration of an image information control unit in FIG.

FIG. 4 is a block diagram showing a detailed configuration of a counter control unit in FIG.

FIG. 5 is an enable signal waveform diagram for explaining the image width conversion processing.

FIG. 6 is an explanatory diagram of sub-scanning control for a recording unit.

[Explanation of symbols]

 1 clock control unit 2 screen information control unit 3 counter control unit 4 interface control unit 103, 105, 107, 214 to 218, 301, 304 to 307 register 104, 106, 206, 210, 303 counter 108, 109, 211 to 213 , 302 Selectors 201 to 203 Interface control circuit 204 Image information processing circuit 205 Variable speed step pulse generation control circuit 207 Delay recording control circuit 209 Image width conversion control circuit S10 Interface with reading unit S11 Interface with recording unit S12 Line buffer control unit Interface S14 MPU data bus S15 MPU interface S16 internal bus

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Makoto Yamatani 1006 Kadoma, Kadoma City, Osaka Prefecture Matsushita Electronics Industrial Co., Ltd.

Claims (1)

[Claims] 1. A microcomputer provided inside a facsimile apparatus for controlling transfer of image information, and a deletion width of image information set by the microcomputer,
A register section for holding control information on the additional width and the effective width, an image width conversion control means for controlling image width conversion of image information based on the control information held in this register section, and a control section for controlling the image width conversion control means. A facsimile control apparatus comprising: an image information processing means for performing an image width conversion process of input image information.