JPS6318196B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a screen display device that divides the screen of a display means such as a cathode ray tube into a plurality of parts, and writes and reads display contents independently for each divided screen.

Conventionally, in order to divide a screen on a display means such as a cathode ray tube into a plurality of parts and write or read data independently on each divided screen, movement of a cursor has been controlled by computer program processing. To write within a predetermined screen range using the keyboard without using a computer to perform program processing, a key-in is required to bring the cursor back within the predetermined range when the cursor moves out of the predetermined screen range.

On the other hand, for example, in Japanese Patent Application Laid-open No. 50-61950,
It is shown that a special character indicating the split screen position is stored and the range of screen editing is limited to the area commanded by this character.

However, such conventional techniques do not show at all how to write or read display contents within a desired split screen.

SUMMARY OF THE INVENTION An object of the present invention is to provide a screen display device that allows easy writing or reading of display contents within a desired split screen.

In order to achieve such an objective, the present invention
In a screen display device configured to display a plurality of split screens on a display means and to write or read display contents to or from a position within the split screen, identification information for each split screen and information indicating the screen area a memory means for storing identification information corresponding to a desired split screen; and a means for inputting identification information corresponding to a desired split screen; and based on the input by the input means, using screen area information corresponding to the desired split screen stored in the memory means. The present invention is characterized by comprising a control means for controlling writing or reading of display contents only within the desired divided screen.

Hereinafter, the present invention will be explained in detail with reference to Examples.

The screen of a cathode ray tube is divided into M and N equal parts vertically and horizontally, respectively, as shown in FIG. Display contents are written and read in units of one character section on the screen shown in FIG. This writing and reading is possible only on the position of the cursor 2 that moves one character section at a time. FIG. 2 is an example in which the screen is divided into two parts, an upper part and a lower part. Split screen 3 has M' rows vertically and N columns horizontally.
Split screen 4 has M″ rows vertically and N columns horizontally. Split screens 3 and 4 have split screen code numbers i and j, respectively.
will be assigned. To write or read display content, (1) set the split screen area and split screen code number, (2) specify the split screen code number and cursor position, (3) specify the cursor control code and display content, or (4) Execution is performed in the order in which display contents of a predetermined length are read. This will be explained in detail based on the apparatus shown in FIG.

First, (1) will be explained. In the case of the example shown in Figure 2, the code numbers i and j of the split screen and the corresponding areas of the split screen are respectively divided into vertical 1 to M' rows, horizontal 1 to N columns, and vertical M'+1 to M rows, horizontal. Data in columns 1 to N are sent from the computer 5 to the interface control device 7 through the transmission path 5'. If the sent data indicates the split screen code number and split screen area, the interface control device 7 sends these data to the cursor & split screen control device 8 via the transmission path 7'. send. If the sent data indicates the split screen code number and split screen area, the cursor & split screen control device 8 sends the data to the split screen area storage device 11 via the transmission path 8''.Split screen area storage The device 11 stores the sent data in units of split-screen codes.Thereby, the split-screen area and split-screen code are set.

Next, (2) will be explained. The computer 5 specifies a split screen code number and a relative cursor position when reading or writing display content. Further, when writing the display contents, the keyboard 6 instructs the divided screen code number in advance, and after the cursor moves within the divided screen, moves the cursor to a predetermined position. Further, when the computer 5 reads display data from a specific position on the split screen specified by the keyboard 6, a cursor is set at the specific position on the split screen using the keyboard 6.

The designation of the split screen code number and the relative position of the cursor within the split screen from the computer 5 and the designation of the split screen code number and movement of the cursor from the keyboard 6 are performed as follows. The computer 5 sends the divided screen code number and data indicating the relative position of the cursor within the divided screen to the interface control device 7 via the transmission line 5'. The keyboard 6 sends a split screen code number and a cursor control code for instructing movement of the cursor within the split screen to the interface control device 7 through the transmission line 6'. Interface control device 7
If the sent data indicates the split screen code number or the relative position of the cursor, it sends these data to the cursor and screen split control device 8 via the transmission line 7'. Furthermore, if the sent data is a cursor control code, the interface control device 7 transmits it from the transmission path 7''.
Send it to the cursor code decoder 9. If the sent data specifies the split screen code number or the relative position of the cursor, the cursor and screen division control device 8 sends these data to the cursor latch and counter 10 through the transmission line 8'.
The cursor latch & counter 10 stores the split screen code number at which the cursor is currently located and the relative position of the cursor.

Note that this cursor latch & counter 10 is
For example, it can be implemented using a cursor counter used in the H-7833 process display system. When the cursor latch & counter 10 receives data specifying a split screen code number from the transmission path 8', the cursor latch & counter 10 transfers the area data corresponding to this split screen code number from the split screen area storage control device 11. Read and store. The cursor latch & counter 10 calculates the position of the cursor to be moved based on the split screen code number and cursor relative position designation data, and the currently stored split screen code number and cursor relative position of the cursor. However, from the keyboard 6, first, only the split screen code number can be used.
Not entered. Further, the computer 5 may also send only the split screen code number.
At that time, the cursor latch & counter 10 moves the specified position of the cursor to the beginning (1 line, 1 line) of the split screen.
column) to calculate the position of the cursor to be moved.

For example, as shown in Figure 4, the cursor latch &
Let the screen code number stored in the counter 10 be i, and the cursor position be at row i and column k. On the other hand, the screen code number sent through the transmission line 8' is l,
The data specifying the cursor position is set to m rows and n columns.
As the divided screen area sent from the transmission line 11' and stored, the divided screen i has M ⁽¹⁾ to ^{M (2)} rows, 1 to N
The split screen 1 has M ⁽³⁾ to ^{M (4)} rows and 1 to N columns. As shown in Figure 4a, when M ^{(2) <} M ^{( 3)} , the cursor is
j)+N(M ⁽³⁾ -M ⁽²⁾ -1)+N(m-1)+n character sections may be moved. As shown in Figure 4b, when M ⁽²⁾ > M ⁽³⁾ , the cursor moves to N-k+N
(M−M ⁽²⁾ +M ⁽³⁾ −1)+N(M ⁽²⁾ −M ⁽¹⁾ +1−j)
It is sufficient to move +N(m-1) character intervals. In the case of FIG. 5, the divided screen i is M ⁽¹⁾ to M ⁽²⁾ as the divided screen area sent from the transmission line 11' and stored.
The rows, N ⁽¹⁾ to ^{N (2)} columns, and the split screen are M ⁽³⁾ to ^{M (4)} matrices. As shown in Figure 5, M ⁽²⁾ <
When M ⁽³⁾ , the cursor is N−k+N(M ⁽²⁾ −M ⁽¹⁾ +
1-j)+N(M ⁽³⁾ -M ⁽²⁾ -1)+N(m-1)+n
+N ⁽³⁾ Just move the character section. When M ⁽²⁾ > M ⁽⁸⁾ ,
The cursor is N-k+N(M-M ⁽²⁾ +M(3)-1)+
N(M ⁽²⁾ −M ⁽¹⁾ +1−j)+N(m−1)+n+N ⁽³⁾
All you have to do is move the character interval. These calculation results are
After sending the cursor movement signal to the video display control device 12 through the transmission line 10', the cursor latch and counter 10 stores the split screen code l, row m, and column n after the cursor has moved. The video display control device 12 moves the cursor and displays the cursor on the viewer 13 in response to a cursor movement signal sent from the transmission line 10'. However, the specified data at the cursor position, row m, column n, is
When the cursor is outside the corresponding split screen area, that is, when m<0, m>M ⁽⁴⁾ −M ⁽³⁾ +1 n<0, n>N ⁽⁴⁾ −N ⁽³⁾ +1, the cursor is not latch. The & counter 10 invalidates and erases the designated data, and does not move the cursor. When the cursor decoder 9 receives a cursor control code through the transmission path 7'', it decodes the movement of the cursor corresponding to the code.As is well known, the cursor decoder 9 may, for example, move the cursor to the right or left. Move one character block to , move up/down line,
There are things that express the meaning of line breaks, moving to the top of the screen, etc. So, cursor latch & counter 1
0 receives the decoded cursor control code sent from the cursor decoder 9 via the transmission line 9', and calculates the destination of the cursor based on the current cursor divided screen and the relative position of the cursor. For example, if the current cursor is
Assume that it is in row j and column k. If the cursor control code indicates movement one character space to the right or left, generate a cursor movement signal that moves the cursor one character space or MN-1 character spaces;
It is sent to the video display control device 12 through the transmission line 10'. However, cursor latch & counter 10
refers to the split screen area read out from the split screen area storage control device 11, checks whether the cursor movement destination will go outside the split screen, and corrects the cursor movement destination. For example, in the example shown in Figure 5, if k = N ⁽²⁾ and a cursor control code to move one character block to the right is received, the destination will be N ⁽²⁾ +
Because it goes outside the split screen i in one column,
In order to move to the beginning of the next line, the character section to which the cursor is moved is set to N-N ⁽²⁾ +N ⁽¹⁾ . Here, if the next line still goes outside the split screen area, in order to move the cursor to the beginning of split screen i, change the cursor movement character section to N (M - M ⁽²⁾ + M ⁽¹⁾ ) +N-N ⁽²⁾
+N ⁽¹⁾ . Similarly, when moving one character block to the left with k=1, in order to move the cursor to the end of split screen i, the character block to which the cursor is moved is changed to N−N ⁽¹⁾ −k+
Let N(M ⁽²⁾ −M ⁽¹⁾ −1)+N ⁽²⁾ . Next, if the cursor control code indicates a shift up or down one line, a cursor movement signal is generated and sent to video display 12 that moves the cursor N(M-1) or M character blocks. However, as mentioned above, the cursor latch & counter 10
refers to the split screen area read out from the split screen area storage control device 11, and the destination of the cursor is
Check if it goes outside the split screen and correct the cursor movement destination. For example, when j = 1, for a cursor control code that moves up one line, move the cursor to N (M ⁽²⁾ - M ⁽¹⁾ ) character blocks to move to the bottom line in split screen i. move it. Also, for a cursor control code that moves one line down when j = M', the cursor is moved by N (M-M ⁽¹⁾ -1) character blocks to move to the top line in split screen i. . Assuming that the cursor control code indicates to move to the beginning of the split screen, if the cursor is at row j and column k of split screen i, then N - M - k + N (M ⁽²⁾ - j - 1) + N ⁽²⁾ Just issue a cursor movement signal to move the character section.

The video display device 12 is numbered from the beginning to the end of the screen. Addressing is from left to right, top to bottom, from 1 to MN.
After the MN address, a pointer is set to return to address 1. When the video display device 12 is powered on, the cursor is set at address 1 and the address is notified to the viewer 13. Thereafter, when a cursor movement signal is sent from the cursor latch & counter 10 via the transmission line 10', the cursor address is advanced according to the number of signals and the viewer 13 is informed of the address. The user 13 displays a cursor at the corresponding address.

Next, (3) will be explained. After setting the cursor,
Writing to and reading from the screen is executed. The written content includes a cursor control code and display content. These contents are sent from the computer 5 and keyboard 6 to the interface control device 7 through transmission lines 5' and 6'. If the received data is a cursor control code, the interface control device 7 sends it to the cursor code decoder 9 through the transmission path 7, and if it is display content, it sends it to the video display control device 12 through the transmission path 7''.
send to However, since each display content data is assigned to each character section, the interface control device 7 sends the display content data for each character section to the video display control device 12, and at the same time sends the cursor data from the transmission path 7'. & to the screen division control device 8,
Sends a one-character block display instruction signal. When the cursor and screen division control device 8 receives a one-character segment display instruction signal from the transmission line 7', it displays the signal on the transmission line 8'.
The data is then sent to the cursor latch & counter 10. When the cursor latch & counter 10 receives a one-character section display instruction signal, it performs the same processing as the cursor control code for moving one character section to the right, emits a signal to move the cursor, and determines the relative position of the cursor after the movement. Retain memory. Based on the cursor movement signal sent from the cursor latch & counter 10 via the transmission path 10' and the display content data sent from the interface control device 7 via the transmission path 7'', the video display control device 12 moves the cursor. In order to move the cursor and display the display content on the moved cursor, a display signal corresponding to the display content is sent to the viewer 13 via the transmission path 12'.The processing of the cursor control code is the same as in (2) above. , the cursor latch and counter 10 calculates the character section to which the cursor is to be moved, and moves the cursor to a predetermined position.

Next, (4) will be explained. After setting the cursor, the number of character blocks to be read from that position is instructed by the calculator 5. The interface control device 7 sends read character section number data to the cursor latch and counter 10 via the transmission path 7', the cursor & screen division control device 8, and the transmission path 8'. When the cursor latch & counter 10 receives read character section number data from the transmission line 8', it sequentially moves the cursor one character section at a time by the number of read character sections from the position in the divided screen where the cursor is currently located. The processing method for moving the cursor one character section at a time is the same as the processing for moving the cursor control code one character section to the right in (2). However, during reading, the cursor latch & counter 10 sends a reading instruction signal and a cursor movement signal corresponding to one character section to the transmission line 10'. When the video display control device 12 receives the read instruction signal from the transmission path 10', it sends the display content on the cursor to the interface control device 7 from the transmission path 12''. Once you receive the displayed content,
The video display controller 12 sends the data to the computer 5 via the transmission path 5''. After reading one character section, the video display control device 12 moves the cursor according to the cursor movement signal corresponding to the one character section received from the transmission path 10', and transmits the data. Road 1
2', the cursor is displayed on the user 13.
As described above, the display contents are read for the predetermined number of read character blocks one by one character block, and at the same time, the cursor is moved within the same split screen.

In addition, if split screen is not set at all,
The cursor latch & counter 10 processes the entire screen as a split screen. Further, even when a code other than the set split screen code is specified from the computer 5 or the keyboard 6, the cursor latch & counter 10 processes the corresponding split screen as a full screen.

In addition, in the above specific example, the divided screen is rectangular, but it may be curved. Furthermore, the split screens may be separate areas, or the split screens may overlap.

It should be noted that the present invention is applicable not only to cathode ray tubes but also to screen division control devices for plasma displays, liquid crystal displays, and other display devices.

As described above, according to the present invention, by simply inputting the identification information representing the desired split screen from the keyboard or computer, the display content can be written or read only within the desired split screen. can.

[Brief explanation of the drawing]

FIG. 1 is a diagram showing how the screen of a cathode ray tube is divided into character sections, FIGS. 2, 4 and 5 are diagrams showing the screen of the cathode ray tube and its areas, and FIG. 3 is a screen display of the present invention. FIG. 2 is a configuration diagram of an example of the hardware of the device.

Claims (1)

[Claims] 1 In a screen display device configured to display a plurality of split screens on a display means and to write or read display contents to a position within the split screen, identification information and screen area for each split screen are indicated. memory means for storing information; means for inputting identification information corresponding to a desired split screen; and screen area information corresponding to the desired split screen stored in the memory means based on input by the input means. 1. A screen display device comprising a control means for controlling writing or reading of display contents only within the desired divided screen.