JPS6373764A - Electronic blackboard - Google Patents

Abstract

PURPOSE:To print and output only a part of area out of information such as a character, a graphic, or a mark, etc., written in the writing area of a writing part by designating the area to be written by a print area designating part and printing and outputting only the information in a print area. CONSTITUTION:The values of the print areas X1, X2, Y1 and Y2 from an X and a Y designating read parts 1X and 1Y are digital-converted by an A/D conversion circuit 12, and are sent to a CPU6 through an I/O port 7. At an AND gate 3, a logical product of a bit of information (read signal)A on the writing part 1 read by a read part 2, a Y1-Y2 signal F effective from a Y1-th dot to a Y2-th dot in one line, and an X1-X2 signal E effective from an X1-th line to an X2-th line, is taken, then a signal B can be obtained. The signal B is stored in a memory part 4, and following that, all of the information including a bit of white information are outputted from the memory part 4 to a print part 5 as a signal C.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to an electronic blackboard that reads information such as characters, figures, symbols, etc. written in a writing area of a writing section and prints out the information.

[Conventional technology]

A device generally referred to as an electronic blackboard has, for example, a rectangular writing area in its writing section. Information such as characters, figures, symbols, etc. written in this writing area is optically read by a reading section, converted into an electrical signal, and temporarily stored in a storage section. The read signal stored in the storage section is sent to the printing section by a control section that controls the entire system, and is printed out there.

[Problem that the invention seeks to solve]

However, in conventional electronic blackboards, all information written in the writing area is read and stored in the storage section. and,
All the reading signals from the storage section are sent to the printing section, so that the printing section prints out all the information in the writing area.

As described above, in the conventional device, the writable area in the writing part coincides with the printable area in the printing part, and therefore it is not possible to print out only part of the information on the nth part of the pen. For this reason, multiple types of information (
For example, after writing two types of information (one type of information that you want to print and save, and the other type of information that you want to keep secret without printing it), you can print out only the information that you want to print and save, and then again, you want to keep it secret without printing it. Information could not be used as is on the same blackboard. This is because conventional devices cannot print out only a part of the writing section, so if you want to print out only the information that you want to print and save, you must first remove the information that you want to keep secret from the writing section without printing. Because it has to be erased.

Therefore, the present invention makes it possible to print out only a part of the information written in the writing area of the writing part, or to print out other areas without printing out only the part of the area. The purpose is to provide an electronic blackboard.

(Means for Solving the Problems) The electronic blackboard according to the present invention includes a printing area specifying section for specifying a part of the writing area as a printing area in the writing section, and a control section that controls the whole. Out of the reading signals from the reading section, only the reading signals of the printing area specified by the printing area specifying section are selected and controlled to be sent to the storage section, or among the reading signals of the storage section, only those of the printing area are printed. The printing section is configured to output only the read signal selected by the control section as a printout.

[Effect]

Since the electronic blackboard according to the present invention is configured as described above,'
The print area designation unit works to designate areas to be printed and areas not to be printed in the writing area of the writing part, and works to select the area to be printed from among the read signals from the control unit 1. Therefore, the printing section prints out only the information in the printing area.

〔Example〕

Hereinafter, one embodiment of the present invention will be described with reference to the accompanying drawings.

FIG. 1 is a block diagram of the same embodiment. In the figure, the electronic blackboard has, as its basic components, a writing section 1 for writing information such as characters, figures, symbols, etc., a reading section 2 for optically reading the information on the writing section 1, and a reading section. an AND gate 3 for gating the read signal from the AND gate 2; a storage section 4 for temporarily storing the read signal from the AND gate 3;
It also includes a printing section 5 that prints out the signals from the storage section 4. Here, the writing section 1 includes an X-designated reading section 1
and Y designated reading section 1. is attached.

Furthermore, the electronic blackboard includes a CPU 6 that controls the operation of the entire device, an I10 board 7 that connects the CPU 6 and other elements, a timing generation circuit 8 for timing information reading, etc., an AND gate 9, and a timing Generation circuit 8
Trailing edge differentiator circuit 10 for differentiating the pulse from the trailing edge
, a clock generation circuit 11 for generating clock pulses, and an A/D conversion circuit 12 for converting analog data from the X and Y designated reading sections 1X and 1Y into digital quantities.
and a program memory 13 that stores programs for the CPU 6.

Next, the functions of each element shown in FIG. 1 and the signal flow between them will be specifically explained.

The designation of the print area in the writing area of the writing part 1 is performed using the writing part 1 and the X, Y designated reading parts 1X, 1. It is done by. Here, the vertical direction of the writing section 1 is the main scanning direction, the horizontal direction is the sub-scanning direction, one line in the main scanning direction has information M for Y dots, and the sub-scanning direction has an information amount for X912. shall be taken as a thing. It is also assumed that the print area designated by the operation pano in the writing section 1 extends from the Y1-th dot to the Y2-th dot in the main scanning direction, and from the X1-th line to the X2-th line in the sub-scanning direction. It is assumed that the information of the writing section 1 is sent to the storage section 4 in this print area, and the information for printing in white is sent to the storage section 4 in the remaining area.

(In D writing section 1: ct-3Gt6X1.X2.Y1.
Y2 is read, for example, as shown in FIG.

Figure 2 shows the writing section 1 in Figure 1, X, Y designated reading section 'lX,
1Y is a detailed configuration diagram. As shown in the figure, variable resistors RX and RY are first embedded in the writing section 1 in the X and Y directions. Then, the points of X1 to Y2 are connected to this variable resistor R.
The X, Y designated reading section IX, 11.1 is configured so that it can slide on the X, R9. If you do this,
Points 1 to Y2 can be read as resistance values. Incidentally, the designated print area in FIG. 2 is the area indicated by diagonal lines in the figure.

This Xl, X2. The values of Yl and Y2 are read as analog quantities and converted into digital quantities by the A/D conversion circuit 12. The digitally converted X1 to Y2 values are then sent to the CPU 6 via the I10 port 7.

The information on the writing section 1 is read by the reading section 2 optically, for example, as described above. FIG. 3 is a diagram showing an example of the configuration of the reading section 2. As shown in FIG. In the figure, a reading surface 21 is illuminated with, for example, a fluorescent lamp (not shown), and an optical image thereof is focused on a lens 22 line by line in the main scanning direction, and the light is accumulated on a CCD sensor 23. The CCD sensor 23 converts this optical signal into an electrical signal, and the amplifier (AMP>24) amplifies this electrical signal (analog).The amplified analog signal is input to one terminal of the comparator (GOMP>25). , since the signal of slice level Vref is input to the other terminal, the digital signal as a result of comparison with this is output as signal (read signal) A. Note that A
When the output level of the MP24 is higher than the slice level, it indicates "white", and when it is lower, it indicates "black".

The information (read signal) A on the writing section 1 read by the reading section 2 in this manner is input to the first terminal of the AND gate 3. A timing signal (Yl-Y2 signal) F that is valid from the Y1-th dot to the Y2-th dot in one line in the main scanning direction is input to the second terminal of the AND gate 3. This timing is the pre-loaded Yl
, Y2, and is given as the output of the timing generation circuit 8 according to the command issued by the central processing unit 6.

As the output of the timing generation circuit 8, the above Yl-Y
In addition to the two signals F, there is a drive signal (read start signal) D that generates one line of read information, and a signal (one line data signal) G that is valid only while one line of information is being sent out. There is. The above read start signal @D is generated at a read cycle of one line and is input to the reading section 2. The one-line data signal G is differentiated at its trailing edge by the trailing edge differentiating circuit 10 to produce a one-line interrupt signal H, and the CPU 6 is interrupted by this signal H. In other words, the CPU 6 can count lines by being interrupted every line.
When the number of lines reaches ×1 line, the CPU 6 issues a command to enable the Xl-X2 Shintan E via the I10 port 7, and disable the Xl-X2 signal E by the interrupt on the X2 line.

In the AND gate 3, the output (read signal) A of the reading section 3,
The Yl-Y2 signal, which is valid from the Y1-th dot to the Y2-th dot in one line, and the Xl-X2 Shintan E, which is valid from the X1-th line to the X2-th line, are ANDed, and the signal (data 1 signal) B is obtained.As shown in the time chart of FIG.
The content from the 1st dot to the Y1-1 dot becomes the white information, the content from the Y1 dot to the Y2 dot becomes the image information read by the writing section 1, and the content from the Y2+1 dot to the Y dot becomes the white information. This becomes white information. Further, the contents from the 1st line to the Xl-1st line and the contents from the X2+1st line to the X line date become white information.

Signal B from this AND gate 3 is written into the storage section 4 according to a command from the CPU 6. Note that the old instruction K of the storage unit 4 becomes effective by this command from the CPU 6.
is called a memory write signal.

The information written in the storage unit 4 is processed by the same CPU 6.
A read operation is executed via the output R of the I10 port 7, and the signal C is set to 1q. Note that this read instruction signal R is called a memory read signal. Signal C is output to printing section 5.

At this time, the data signal G for one line and the output I of the clock generation circuit 11 are ANDed by an AND gate 9, and a shift signal J to the printing section 5 is generated. Program memory 1
3 is for storing programs, and is connected to the CPU 6 via an internal bus.

Next, the information reading operation and printing operation performed in the embodiment configured as described above will be explained with reference to time charts 1-.

FIG. 4 is a time chart showing the operation when reading one line in the main scanning direction. As shown in the figure, the data signal G for one line becomes valid in response to a read start signal from the timing generation circuit 8, and the valid time lasts for the length of one line, Y dots.

Then, when the data signal G for one line falls, 1
A line interrupt signal H is generated. Then, when the signal @H from the trailing edge differentiating circuit 10 interrupts the central processing unit 6, the number of sub-scanning lines is updated by +1. on the other hand,
Y'1-Y22qF from the timing generation circuit 8 is valid in the range from the Y1-th dot to the Y2-th dot counting from the rise of the data signal G for one line. Data 1 signal B becomes signal (image information) A from reading section 2 during this valid period of Yl-Y22q, and becomes white information during other periods.

FIG. 5 is a time chart showing the operation from reading one screen to printing. As shown in the figure, writing of the data 1 signal B to the storage unit 4 is started after the memory write signal K from the I10 boat 7 rises, and the number of lines is updated by the 1 line interrupt signal H from the trailing edge differentiating circuit 10. be done. When the 1-line interrupt signal H interrupts ×1 times and the number of lines in the sub-scanning direction becomes ×1, the Xl-X2 signal E rises, and when the number of lines in the sub-scanning direction becomes X2, the Xl-X2 signal E falls. Then, when the number of lines in the sub-scanning direction reaches X, the memory write signal is turned off and the reading operation for one screen ends. After this,
The memory read signal R becomes valid and printing of one screen starts. The memory read signal R is turned from on to off when the number of one-line interrupt signals T1 reaches X, and the printing operation for one screen is completed.

Next, with reference to the flowchart of FIG. 6, the reading and printing processes of this embodiment will be explained, focusing on the processes in the CPU 6.

First, in step 101, the copy key (
(not shown) is pressed. When the copy key is pressed, the process advances to step 102, where Xl, X2, . Yl, Y2 to X, Y designation reading section 1X, 1Y
Read from. The values of this X1 to Y2 are A/D conversion circuit 1
2, it is analog-digital converted and sent to C, PU6. Therefore, the CPU 6 sends Yl, Y to the timing generation circuit 8.
Set the value of 2 to Sera 1 and generate Yl-Y2 signal @F (
Step 103).

Next, the CPU 6 initializes the line count to "O" (step 104), and in step 105 the CPU 6 initializes the line count to "O".
Turn on the memory line (-signal@K) via the memory line (-signal@K). This makes it possible to read one screen to the memory section 4, and when the line count becomes equal to Xl in step 106 (the scanning of the writing section or the When the Xl-X2 signal E from the I10 port 7 reaches the first line of
Data will be read when qF is on. Note that this line count is performed by the one line interrupt signal 1 from the trailing edge differentiating circuit 10, and the processing is as shown in step 200 in FIG. 6(C).

The Xl-X2 signal E remains on until the line count equals X2 in step 108, and when the line count reaches X2, the Xl-X2 signal gE turns off (step 109). That is, the scanning of the writing area goes beyond the edge of the printing area and changes to the scanning of the writing area other than the printing area. Then, when the line count reaches X in step 110, scanning of the writing area is completed to the last line, so the memory write signal is turned off and the line count is initialized to 'O' (step 112).

With the above operation, the read signal (data 1 signal) B to the storage unit 4
Storage is completed, and then a read signal is output from the storage section 4. That is, in step 113, the memory read signal R is turned on, and all information including white information is output as a signal C from the storage section 4 to the printing section 5. Then, when the line count reaches X (step 114)
The reading is completed and the memory read signal R is turned off (step 115).

FIG. 7 is a diagram showing the relationship between written input and printed output in this embodiment. Even if the written input is in area A-1 in the figure, the printout is only in area E, and no other areas are printed.

The present invention is not limited to the above embodiments, and various modifications are possible. For example, in the embodiment, only information on the printing area is stored in the storage unit as valid data, but all information on the writing area is stored in the storage unit as valid data, and in the printing unit, only information on the printing area is stored. may be printed as valid data. Further, in FIG. 7, an area other than the area E may be used as a printing area, and only the area E may be printed out.

〔Effect of the invention〕

As described above in detail, in the present invention, the area to be printed is specified in the printing area designation section, and only the information of the printing area is printed out, so that the characters written in the writing area of the writing section, It is possible to obtain an electronic blackboard that can print out only a part of information such as figures, symbols, etc., or only print out other areas excluding the part of the area.

[Brief explanation of the drawing]

FIG. 1 is a block diagram of an electronic blackboard according to an embodiment of the present invention, FIG. 2 is a detailed block diagram of an example of the writing section and X, Y designated reading section shown in FIG. 1, and FIG. 3 is a block diagram similar to that shown in FIG. 4 is a time chart showing the reading operation for one line in the main scanning direction in the embodiment of FIG. 1, and FIG. 5 is a diagram of one screen in the embodiment of FIG. 1. 6 is a flowchart showing the processing by the CPU of FIG. 1, and FIG. 7 is a diagram showing the relationship between written input and print output in the embodiment of FIG. 1. 1... Writing section, 2... Reading section, 3, 9... AND gate, 4... Storage section, 5... Printing section, 6... C
PU, 7... I10 port, 8... Timing generation circuit, 10... Trailing edge differentiating circuit, 11... Clock generation circuit, 12... A/D conversion circuit, 13... Program memory , 21... Reading surface, 22... Condensing lens, 23... CCD sensor. Patent applicant: Oki Electric Industry Co., Ltd. 1-11 Writing section Detailed illustration of the writing section and X, Y reading section of the first cause 2
Figure 21-m-Reading surface 23--Detailed view of the reading section of CCD Sentoge Figure 1 Figure 3 Figure 7 of the scribe of the present invention and printout diagram

Claims (1)

[Scope of Claims] A writing section having a writing area for writing information such as characters, figures, symbols, etc., a reading section that reads information written on the writing section and outputs a reading signal, and this reading signal. a storage section for temporarily storing the reading signal; a printing section for printing out the reading signal from the storage section; sending the reading signal from the reading section to the storage section and transmitting the reading signal from the storage section to the printing section. and a control section that controls transmission of reading signals, further comprising a printing area designation section for specifying a part of the writing area in the writing section as a printing area, wherein the control section is configured to control transmission of reading signals from the reading section. out of the read signals of the print area specified by the print area designation section and control to send it to the storage section, or among the read signals of the storage section specified by the print area designation section What is claimed is: 1. An electronic whiteboard characterized in that control is performed so as to select only the read signal of the printed area and send it to the printing section.