JPS63131654A - Electronic blackboard device - Google Patents

Abstract

PURPOSE:To accelerate a printout time, by transferring a data to a memory and a printer with a step of processing in which a processor outputs a write instruction. CONSTITUTION:When the data of one line is transferred by every byte to the memory 2 and printer 3, the data of one byte read at an optical reading part 1 is written on a write data register 5 by outputting the write instruction from the processor 4, and it is transferred to the memory 2 and the printer 3. At this time, since an address counter 6 increments an address automatically, the next data of one byte read at the optical reading part is written on the write data register 5 by outputting the write instruction from the processor 4, and it is transferred to an increased address in the memory 2 and the printer 3, and also, the address counter 6 increments the address automatically. Hereafter, the above operation is repeated until the transfer of the data of one line is completed. In this way, it is possible to accelerate the printout time.

Description

[Detailed Description of the Invention] [Summary] In an electronic whiteboard device, optically read data is
In order to speed up the transfer to the memory and printer, we provide a common write data register for the memory and printer, and an address counter that automatically increments the memory address by writing to the write data register. By making it possible to transfer data to the memory and printer with a write instruction step that simply writes to the data register, the processing speed of the processor is increased and printouts to the printer can be made faster. It is something.

[Industrial application field]

The present invention has a function of winding up a roll-shaped sheet, reading characters and figures written on the sheet with an optical reading section, storing data of the read characters and figures in a memory, and printing it out with a printer. The present invention relates to an improvement of an electronic whiteboard device having the following.

In electronic whiteboard devices, optically read data is stored in a memory when printed out for the first time so that when printing out again, the data can be printed out without moving the sheet and performing a reading operation.

Since the electronic whiteboard device cannot be used during this first printout, it is desirable to be able to print out quickly.

[Conventional technology]

A conventional example will be explained below using figures.

FIG. 5 is a block diagram of a conventional electronic whiteboard device.

In the electronic blackboard device, when the optical reading section 1 reads characters and figures written on the rolled sheet 7, the lamp 9 is turned on by the lamp control circuit 13, and the motors 10 and 11 are turned on by the motor control circuit 12. .14, the sheet 7 is wound up, and data line by line is sequentially imaged on a CCD (charge coupled device) 8 via a lens 30 and read.

When transferring this read data to the memory 2 and printer 3, for example, for one line (approximately 160 bytes), the optical reading section 1
Read one byte at a time.

■Set the address of the memory 2 where the data will be written using the microprocessor 4'.

■Write data to this address in the memory 2 according to instructions from the microprocessor 4''.

■According to instructions from microprocessor 4°, register 22
The written data is sent to the printer 3 and printed out.

■Add 1 to the memory address using microprocessor 4.

Repeat the above until one line is completed.

In this way, the optically read data is transferred to the memory 2.
and is transferred to printer 3.

[Problem that the invention seeks to solve]

However, in the conventional electronic whiteboard device described above, even if the reading speed of the CCD 8 and the printing speed of the printer 3 are increased in order to shorten the time it takes to print out,
Since the processing steps of the microprocessor 4 to print out bytes are as many as 5 steps as described above, there is a problem that the overall speed is limited by the transfer speed of the microprocessor 4 and cannot be made faster than this limit.

[Means for solving problems]

As shown in the principle block diagram of FIG.
a write data register 5 that simultaneously outputs the address of the memory 2 to the write data register 5;
It has an address counter 6 that is automatically incremented by a write instruction from the processor 4, and writes the data read by the optical reading section 1 to the write data register 5 by a write instruction from the processor 4. This problem is solved by the electronic whiteboard device of the present invention, which allows data to be transferred to the memory 2 and the printer 3 in just a few steps.

[Effect]

According to the present invention, for example, one line of data can be
When transferring bytes to the memory 2 and printer 3, when the processor 4 outputs a write command, the 1-byte data read by the optical reading section 1 is written to the write data register 5 and transferred to the memory 2 and printer 3. be done.

At this time, the address counter 6 automatically increments the address, so when the processor 4 outputs a rewrite command next time, the next 1 byte of data read by the optical reader 1 is written to the write data register 5. Incremented address of memory 2 and printer 3
The address counter 6 automatically increments the address.

Thereafter, the above operation is repeated until one line of data is transferred.

That is, in one step of processing in which a write command is output from the processor 4, one byte of data is transferred to the memory 2 and the printer 3. Therefore, for example, the reading speed of the COD and the printing speed of the printer 3 can be increased. It is possible to speed up the time to go out.

〔Example〕

An embodiment of the present invention will be described below with reference to the accompanying drawings.

FIG. 2 is a block diagram of an electronic whiteboard device according to an embodiment of the present invention.
FIG. 3 is a time chart in the case of transferring to the memory and printer in FIG. 2, and FIG. 4 is a time chart in the case of reading out and inputting to the printer in FIG.

Since the reading of characters and figures written on the sheet 7 of the electronic blackboard device by the optical reading section 1 is the same as in the conventional case explained with reference to FIG. 5, the subsequent operation will be explained.

When transferring the first 1 byte of data for one line, the microprocessor 4 gives the address initial value XO to the address counter 6, and writes it into the write data register as shown in FIGS. 3(A) and 3(B). When the address AO of 5 is specified and the Lebel write command is output, the address decoder 21 outputs the Lebel signal as shown in FIG. 3(C), and the AND circuit 15 outputs the Lebel signal as shown in FIG. 3(D). A rubel signal is output as shown in FIG.

This output causes the write data register 5 and the write control unit 16 to be read, and as shown in FIG. , the set data is stored in the third memory of the memory 2 under the control of the write control unit 16.
The data is transferred to the address initial value XO specified by the address counter 6 as shown in FIG. 3(F) and to the printer 3 as shown in FIG. 3(G).

When the write command is transferred and becomes O level, the output of the AND circuit 15 is inverted by the NOT circuit 17, and the output becomes XO+1.
becomes.

Next, the microprocessor 4 specifies the address AO of the write data register 5 as shown in FIGS. As shown in FIG. 3(C), a Lebel signal is output, and the AND circuit 15 outputs a Lebel signal as shown in FIG. 3(D).

By this output, the write data register 5 and the write control section 16 are set, and as shown in FIG. , the set data is stored in the third memory of the memory 2 under the control of the write control unit 16.
3 (G) at the address 'XO+1' specified by the address counter 6 and the printer 3 as shown in Figure (F).
The data is transferred as shown in .

When the write command is transferred and becomes O level, a signal obtained by inverting the output of the AND circuit 15 by the NOT circuit 17 is input to the address counter 6, where it is incremented, and the output becomes XO+2.

The above operations are repeated until one line of data is transferred.

To transfer the next line of data, change the initial address value to
If a write command is output as O+N (N is the number of bytes of data for 1947), the same operation as above will occur.

That is, in one step of processing in which the microprocessor 4 outputs a write command, 1 byte of data is transferred to the memory 2 and the printer 3, so if the reading speed of the CCD 8 and the printing speed of the printer 3 are increased, the printing speed can be increased. You can speed up the time to go out.

Next, a case will be described in which the data stored in the memory 2 is transferred to the printer 3 for printing out.

The microprocessor 4 gives the address initial value XO to the address counter 6, specifies the address AO of the read data register 18 as shown in (A) and (B) of FIG. 4(b), and issues the Lebel read command. When output, the address decoder 21 outputs the Lebel signal as shown in FIG.
As shown in (D) of a), a rubel signal is output.

By this output, the read data register 18 and the continuous output control section 19 are set, and 1 byte is started from the address of the address initial value XO of the output of the address counter 6 of the memory 2 shown in FIG. The data corresponding to the number of minutes is read out, set in the read data register 18, and read by the microprocessor 4, as shown in FIG. 4(a) (F).

Next, the microprocessor 4 executes (A) (in FIG. 4(b)).
As shown in FIG. 4B, when the address AO of the write data register 5 is designated and the Lebel write command is output, the address decoder 21 outputs the Lebel signal as shown in FIG. 4B (C). The AND circuit 15 outputs a Lebel signal as shown in (D) of FIG. 4(b).

By this output, the write data register 5 and the write control unit 16 are set, and the read data register 1 is set first.
One byte of data read from 8 is set in the write data register 5, and the set data is stored in the address initial value XOO specified by the address counter 6 in the memory 2 under the control of the write control unit 16. and is transferred to the printer 3 as shown in (F) of FIG. 4(b). When the write command is transferred and becomes O level, AND circuit 1
The Lebel signal obtained by inverting the output of 5 in the NOT circuit 17 is input to the address counter 6, where it is incremented as shown in FIG. 4(E), and the output becomes XO+1.

Thereafter, the contents stored in the memory 2 can be transferred to the printer 3 and printed out by simply repeating this reading and writing.

〔Effect of the invention〕

As explained in detail above, according to the present invention, data is transferred to the memory and printer in one step in which the processor outputs a write command. This has the effect of speeding up the printout time.

[Brief explanation of the drawing]

FIG. 1 is a block diagram of the principle of the present invention. FIG. 2 is a block diagram of an electronic whiteboard device according to an embodiment of the present invention. FIG. 3 is a time chart for transferring data to the memory and printer in FIG. 2. FIG. 4 is a time chart for reading data and inputting it to the printer in FIG. 2, and FIG. 5 is a block diagram of a conventional electronic whiteboard device. In the figure, 1 is an optical reader, 2 is a memory, 3 is a printer, 4 is a processor, 4° is a microprocessor, 5 is a data register for writing, 6 is an address counter, 7 is a sheet, 8 is a COD . 9 is a lamp, 10.11 is a motor, 12.14 is a motor control circuit, 13 is a lamp control circuit, 16 is a write control section, 18 is a read data register, 19 is a read control section, 21 is an address decoder, 30 is a lens shows. Departure month f Hara Jri Flo Soft figure pigeon 1 figure

Claims (1)

[Claims] A roll-shaped sheet is wound up, characters and figures written on the sheet are read by an optical reading section (1), and data of the read characters and figures is stored in a memory (2). In addition, in an electronic whiteboard device having a function of printing out with a printer (3), the data read by the optical reading unit (1) is written in response to a write command from the processor (4).
A write data register (5) that simultaneously outputs to the memory (2) and the printer (3), and a write instruction to write the address for writing to the memory (2) to the write data register (5). Address counter (6
), and in response to a write command from the processor (4), the data read by the optical reading section (1) is written into the write data register (5). ) and the printer (3).