JPS59178486A - Display control system - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION (1) Technical Field of the Invention The present invention relates to a display control method for displaying specific display information on the screen of a display device such as a cathode ray tube.

(2) Technology background.

In general, display devices are used to display a single piece of display information over the entire screen, or when it is desired to compare multiple pieces of display information, one screen is partitioned and each piece of display information is displayed. There is such a thing.

(3) Prior art and its problems As a conventional display control method used to display multi-line display information on one screen, for example,
As shown in the figure, a memory with a storage capacity equal to the number of pixels (m There is a system in which the fortune-telling command information A, K is displayed on the screen IJ-1: after each information bit of the display information A, is stored in the address.

However, in such a conventional display control method, a memory with a storage capacity corresponding to the number of pixels on the screen l is required, regardless of the area occupied by the display information A, on the screen l. Not only does the storage capacity of the memory increase unnecessarily, but if the display information K is moved from the solid line position to the virtual line position on the screen 11-, each display information It becomes necessary to update the entire memory by moving the information bits to new addresses, which makes rearranging the information displayed on the screen more troublesome.

(4) Purpose of the Invention The present invention has been made based on the above points of view, and its purpose is to unnecessarily increase the storage capacity of a memory that stores display information. It is an object of the present invention to provide a display control method that allows the arrangement of display information to be easily changed on the screen.

(5) departure)! 11. Configuration and 1. The basic configuration of the present invention is a memory that stores display information, and stores at least a base point address, the number of rows, and the number of columns as position information that determines the display position of the display information on the screen. It comprises a position information memory, a main counting circuit that counts scanning positions on the screen, and a sub-counting circuit that counts addresses of display information in the memory, and when the base point address and the value of the main counting circuit match. , the display control method is configured to start the sub-counting circuit and read display information in the memory based on position information stored in the position information memory.

(6) Embodiments of the Invention Hereinafter, the present invention will be described in detail based on embodiments shown in the accompanying drawings.

In the embodiment shown in FIG. 2, display information A and display information K are displayed at predetermined positions on the screen l.

Now, to explain the basic principle of the display control method using the display information K as an example, the display information has information pins in column 1 and row j) (C
As shown in FIG. and is stored in advance at a predetermined address in the memory. Then, the position information that specifies the position on the screen 1 of the display information is specified, and this position information indicates, for example, from which pixel position on the screen 1 the base point of the display information starts. The display information consists of base point information indicating the display information, and area information indicating the size on the screen of the display information. Now, hypothetically,
If the base point of the display information starts from the pixel position of Xk columns and Yk rows, then Xk and Yk become "-" base point information, and the size of the display information is ΔXk If Xk columns and Yk rows, ΔXkXΔ
Yk becomes the 1-record area information.

From this state, if the pixel position on one screen l is made to correspond to the base point information 1 and YSt of the above position information, the base point position on screen 1- is determined in the display information, and the area information ΔXkXΔYk is Taking this into consideration determines the position of the displayed information on the screen.

After this, if the base point information Xk, Yk of the location information described in 1. 2 will be displayed at each pixel position on the screen l using the above position information as a medium.

Therefore, when changing the arrangement of the display information K on the screen l, it is sufficient to simply convert the base point information Xk, Yk of the position information. At this time, the reference point information Xk, Yk will be converted, but since it always corresponds to the reference point information bit C11 in the display information in the memory Once the position of the display information is determined, each information bit of the display information is placed at a predetermined position on the screen using the position information as a medium. In this case, there is no need to move each information bit of the display information to a new address in the memory, and each information bit is always stored in a predetermined address, and the storage capacity of the memory is Since it is sufficient to store each information bit of information, it is not necessary to make the storage capacity of the memory N correspond to the number of pixels of the screen IF, and the storage capacity of the memory X is set to be correspondingly small.

Figure ttS4 shows an example of a control circuit used to implement the display control method according to the present invention. In the figure, l is a screen, and a part of this screen 1 displays information K.
is now displayed. 2 is a main counting circuit that sequentially counts pixel positions on screen 1''2 in synchronization with raster scanning on the screen, and each pixel position is determined by pixel address X in the column direction and pixel address Y in the row direction on screen 1. It is now specified by. Reference numeral 3 denotes a position information memory in which position information for specifying the position on the screen 1 and 2 is rewritably stored and stored in the display information, and base point information Xk,
Yk is stored as the base point address xk in the column direction and the base point address Yk in the row direction, and area information ΔXk in one display information
XΔYk is stored as the number of columns ΔXk and the number of rows ΔYk,
Furthermore, the number of line intersections ΔYk' that sequentially counts the number of lines ΔYk in the display information, and the address where the display information [base point address in the memory ML of K, in other words the base point information pin] cll is stored. There is. 4 is an address register in which the count Yk of the main counting circuit 2 is stored. 5 is a comparison circuit which compares the pixel addresses X and Y of the main counting circuit 2 and the base point address X of the address register 4.
It compares k and Yk and outputs when they match. Reference numeral 6 denotes a sub-counting circuit, which sequentially counts information bits of display information in the memory X, and is controlled by a sub-counting circuit control section (hereinafter referred to as control section) 7. The sub-counting circuit control section 7 operates upon receiving the output from the L comparison circuit 5, and determines the range to be counted by the sub-counting circuit 8 based on the 1-position information. That is, the control unit 7 stores "in the memory corresponding to the base address Xk, Yk".
The second base point address is selected, and the address of column number ΔXk from this base address is designated as the counting range of the sub-counting circuit 6, and the sub-counting circuit 6 is set to ΔXk.
After counting the information bits in the display information, each information bit is stored in the line buffer 8. When the sub-counting circuit 6 finishes counting by ΔXk, the counting of the sub-counting circuit 6 is temporarily stopped, and its control unit 7 adds 1 to the value of the row intersection number ΔYk' in the position information memory 3. Then, the address register 4 receives Yk'-Y via the adder circuit 4a.
A new address of k+ΔYk' is set. In this state, when the 11 counting circuit 2 counts, the pixel addresses X, Y of the main counting circuit 2 and the set addresses Xk, Yk' of the address register 4 match, and at this time the comparator circuit 5 outputs. Then, the control section 7 calculates the address on the memory N corresponding to the setting addresses Xk and Yk', and since the address from this address to the address of the column number ΔXk is specified, the sub-51 number circuit 6 Each information bit is counted in the range and stored in the line buffer 8. Then, when the sub-counting circuit 8 finishes counting, the control section 7 controls the row intersection number ΔYk in the position information storage circuit 3 in the same manner as described above.
1 is added to the value of ', and a new address is set in the address register 4 accordingly. This operation continues until the line intersection number ΔYk' becomes ΔYk, and at this stage all the information bits of the display information in the memory X are temporarily stored in the line buffer 8.

The screen l passes through a character generator 9 that converts the bit pattern and a conversion circuit lO that converts it into a video signal.
displayed in the specified position above.

It should be noted that the means for implementing the display control method according to the present invention is not limited to that shown in the above embodiments, and it goes without saying that the design can be changed as appropriate.

(7) As described in detail of the invention, according to the display control method according to the invention, the display information on the screen can be controlled without unnecessarily increasing the storage capacity of the memory for storing display information. It becomes possible to perform rearrangement conversion extremely easily.

[Brief explanation of the drawing]

Figure 1 is an explanatory diagram showing a conventional display control method;
FIG. 3 is an explanatory diagram showing the display control method according to the present invention, FIG. 3 is an explanatory diagram showing the storage state of display information in memory, and FIG. 4 is a control diagram for implementing the surface water control method according to the present invention. It is a professional diagram showing an example of a circuit. A, K...Display information H...Memory ■...
Screen 2...1 Counting circuit 3...Position information memory 4...Address register 5...Comparison circuit 6...Sub counting circuit 7...Sub, IL number circuit control section

Claims (1)

[Claims] a memory for storing display information; a position information memory for storing at least a base point address, the number of rows, and the number of columns as position information for determining the display position on the screen of the display information; and a master counter for counting scanning positions on the screen. a λ1 number circuit and a sub-counting circuit for counting the address of display information in the memory, and when the base address and the value of the main counting circuit match, the sub-λ1 number circuit is activated to count the address of the display information in the memory. A display control method characterized in that display information in the memory is read out based on position information stored in the memory.