JPS5891490A - Crt display - 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 The present invention relates to a CRT display device, and particularly to a CRT display device used as a man-machine interface device in an electronic computer system.

(b) Prior art A conventional CRT display device is a CRT (hereinafter referred to as rate K CR'
When written as r, CRT is a component of a CRT device.
means an indicator. ) is generally equipped with a storage device that stores display information within the range that can be displayed.

However, while displaying a part of a large screen that cannot be displayed simultaneously on a CRT, there is a need to continuously move the currently displayed screen in any direction to display a desired part of the large screen. .

In response to such demands, conventional general CRT display devices have been operated as follows. That is, a method has been used in which the contents of a storage device within a CRT display device are sequentially rewritten by outputs from the computer itself, thereby moving the screen sequentially. However, this method requires the computer itself to process a large amount of data in order to output the display information, so it takes time to move the screen.
There were problems such as not being able to move the screen smoothly from the user's perspective, and processing a large amount of data, which increased the load on the computer itself, which could interfere with the computer's normal business processing. . In order to eliminate this inconvenience, a CRT display device having a storage device capable of storing one more information than can be displayed simultaneously on a CRT has been considered.

The operation of the above-mentioned improved CRT display will be explained with reference to FIG. FIG. 1(a) shows a CRTI capable of displaying 2×2=4 pixels. The large screen 2 that we actually want to display here is 4X, as shown in Figure 1(b).
4=16 pixels.

The CRT display device flK has a storage device 3 capable of storing the contents of 4×4=16 pixels as shown in FIG. 1(c)K. A normal CRT display device is 80 x 40 x 32
It has a display capacity of about 00 pixels, and the storage device of a CRT display device also generally has a unit memory (pixel) corresponding to this, but here, for simplicity, we will use a CRT of 2 x 2 pixels.
The explanation will be given assuming a CRT storage device 3 having 4×4 pixels.

Figure 1' hIK shows CRT I Fi, X in screen 2 =
A total of 4 pixels, 2 pixels to the right and 2 pixels to the bottom from O1Y=0.

B, E indicates that %F is displayed. That is, this CRT display device is configured so that a total of four pixels, two pixels in the X direction and two pixels in the Y direction, can be displayed on the CRT 1 from the pixel indicated by the coordinates (X1Y) of the storage device 3. Therefore, F%G%J on screen 2.

In order to display K, the coordinate register (X%Y) in the CRT display device should be changed to X=1, Y=1.

By performing an operation to rewrite this coordinate register using, for example, a joystick, the display screen of the CRT can be moved without performing any processing on the computer itself.

However, depending on the content of the screen to be displayed, it may be inconvenient for the entire screen to move. For example, there are generally areas on the screen necessary for explaining the contents of the entire large screen, such as the name of the screen, comments for the entire screen, and a light pen reception area. It would be inconvenient for such an area to disappear from the CRT display screen due to screen movement as described above. In the example of the screen displayed on the CRT IK shown in FIG.
, 1), it is desirable that a screen 4 as shown in FIG. 1(d) be displayed.

On the other hand, the method of overlapping CRT screens has been used for $
This will be explained using Figure 2. As shown in Figure 82(a) K,
A storage device 5 consisting of 2x2=4 pixels and a storage device 602
This is a CRT display device that has multiple storage devices and can display the contents superimposed on a CRT 7K video signal.

In the example, if we store AlC in the storage device 5 and 6KB%D in the storage device, and display them superimposed, the CRT
7, A, B, C.

This shows how D is displayed.

A case will be described in which a large screen storage device capable of screen movement is used as one of the storage devices of a CRT display device that performs such a superposition function.

In FIG. 82(b), the storage device 8 is a large screen storage device consisting of 4 Fi4 pixels, and the storage device 9 is a 2×2 storage device.
It is a storage device consisting of pixels, and the contents of the storage device 8 and the contents of the storage device 9 are superimposed at the video signal level to create a C.
Displayed on RT 7. When these storage devices store data as shown in FIG. 2(b),
Large screen coordinate register (X%Y) of storage device 8 = (0, O
), a screen with contents as shown in Figure (c) of H111E2 is displayed on the CRT 7.

However, the large screen coordinate register (X, Y) = (1, 1)
, B and G overlap on the screen of the CRT 7, making them unreadable in some cases. Furthermore, whether the content G of the storage device 8 should be displayed in such a case, the storage device 9
It is CR to decide in advance whether content B should be displayed.
This results in a lack of flexibility as a T display device. Depending on the content of the screen to be displayed, if you want to display the contents of the storage device 8 with priority, if you want to display the contents of the storage device 9 with priority, or if you want to display the contents of the storage device 9 as they are (in a logical sum), There are cases where you want to display only the matched parts of the pattern (the result of logical AND).

(c) Purpose of the Invention The present invention was made with the aim of solving the above-mentioned problems, and it is possible to move the screen quickly and smoothly without putting a load on the computer itself, and moreover, It is an object of the present invention to provide a CRT display device that can perform necessary overlapping processing for areas on a CRT specified by the computer main body.

(d) Examples Examples will now be described with reference to the drawings. FIG. 3 is a block diagram of an embodiment of the CRT display device according to the present invention, and FIG. 4 is a diagram for explaining the operation.

In Fig. 3, 1 is a computer and 15 is a CRT display device, which consists of a CRT controller and a CRT display (equipment).The CRT controller 20Fi receives display information and control information from the computer 1o, 21, the first storage device 23A1 or the second storage device 23 via the display controller 522t
B1 or superimposed code storage device stores and sets to 1 or coordinate register. First storage device 23A% Second storage device 23B1 Superimposed code storage device #27, Display information for coordinate register Izuku, control information is determined by the display controller, and the command is sent to the specified location. Make memory settings.

The superposition circuit 24 is a superposition code storage device! 2
7 and the contents of the coordinate register edict, the contents of the first storage device 23A and the contents of the second storage device 23B are periodically superimposed pixel by pixel.

The superimposed display information is converted pixel by pixel into a pixel pattern signal corresponding to the code by the pattern generation circuit section, and further converted into a video signal by the video signal generation circuit 26 and displayed on the CRT display (9). Ru.

Here, it is assumed that the viLl storage device 23A has a large angle equivalent to the large screen mentioned above, and the second storage device 23B has a size equivalent to a CRT display.

On the other hand, at some point, the first
The coordinate register 23 giving the coordinates (X%Y) on the memory of A is set by a command signal given from the computer lO to the display controller n, or by an external device such as a joystick 4°. From this, settings can be changed using a signal via shift signal control circuit 4. Furthermore, the contents of the first storage device 23A and the contents of the second storage device 23B are prioritized according to the contents of the superimposed code storage device n at the corresponding coordinate position, as shown in Table 1. superposition, superposition of priority on the storage contents of the second storage device,
Superposition of a pixel pattern corresponding to the first storage device storage content code and a pixel pattern corresponding to the second storage device storage content code, or a pixel pattern obtained by logical ANDing. Overlapping as a pattern,
Furthermore, various overlapping methods such as overlapping using exclusive OR pixel patterns are possible. (Left below) Table 1 Example of overlay processing logic Next, the present invention will be explained in detail using the vLs diagram and FIG. 4. Here, for the sake of simplicity, the first storage device fi 23A in FIG. 3 has 4×4 pixels, and the second storage device 23 B I
fi2 x 2 pixels, CR'r display 30Fi2X21
This will be explained assuming that it has a capacitance of 11 elements. Further, the superimposed code storage device n needs to have the same capacity as the CRT display, and in this example, codes corresponding to 2×2=4 pixels are required. In the CRT display device configured in this way, the computer 10 is configured as shown in FIG. 4(a), (
Information representing the screen shown in b) is written into the first storage device vIIt23A and the second storage device 23B, respectively. For example, the superimposed code on ¥ is stored in the code storage device f27 as shown in FIG.
) Set the superimposition code as shown in K. The meanings of the superimposition codes are as shown in Table 1. In this state, the coordinate register prisoner is (X%Y) = (
0, O), the superposition circuit 24 creates display data by referring to the respective superposition codes, so that the content displayed on the CRT display is as shown in FIG. 4(d)K. is obtained.

Next, the large screen memory coordinate axes are set using an external device such as a joystick, for example (X%Y)=(1
, 1).

ml contents of storage device Z3A, second storage device 23B
Assuming that there is no change in the contents of the superimposed code storage device n, the contents displayed on the CRT display will be as shown in Fig. 4 (6).
)become that way. That is, when comparing FIG. 4(d) and (e), the screen stored in the first storage device moves toward the lower right as the coordinate register moves, but there is no overlapping. The portion for which the second storage device is prioritized by the combination code storage device n is displayed on the screen without moving.

In this way, specified areas on the screen, such as the area that displays the screen name, the area that displays the screen display time, and the area that displays the light pen instruction command, are displayed regardless of the movement status of the large screen. Areas where there is a need can be prevented from moving. Further, by using a superimposition code, a logical sum, a logical product, and an exclusive logical sum code, it is possible to combine pixel patterns for each pixel, and various superimposed displays are possible. So □
Therefore, the logic circuit including the CRT controller can be easily realized using an LSI such as a microcomputer and its firmware. In addition, in the above explanation, the first storage device has a large screen and the second storage device has a normal size screen. Any combination is possible, such as forming one set.

(・) As described in detail, according to the present invention, a superimposed code storage device is provided for a first storage device equivalent to a large screen and a second storage device equivalent to a CRT display, and Since the screen is moved and superimposed according to the alignment code, it is possible to freely specify the superimposition logic for each pixel on the display screen, making it particularly easy to use for CRT display devices with large screen storage devices. It is possible to greatly improve the quality.

[Brief explanation of drawings]

FIG. 1; FIG. 2 is a diagram explaining the operation of a conventional CRT display device; FIG. 3 is a block diagram of an embodiment of the device of the present invention;
FIG. E4 is a diagram illustrating the operation of the embodiment of the apparatus shown in FIG. 3. lO...Calculator, 15...CRT display device, addition...
・CRT controller, I...CRT display, 40・
...Joystick, 21...Input interface, 22...Display controller, 23 A...
1st storage device, 23B...Second storage device, 24...Superposition circuit, 25...Pattern generation circuit, 26...Video signal generation circuit, 27...Superposition code storage Device, 28... Coordinate register, 4... Shift signal control circuit - Figure 1, Figure 2 (C) (d) Figure 4

Claims (1)

[Claims] In a CRT display device capable of displaying stored contents from a storage device and moving the display screen, the storage device includes a first storage device having storage contents equivalent to a large screen, and a second storage device having storage contents equivalent to a CR7 display. a second storage device; and the first storage device.
A superposition storage device for determining screen movement for each second storage device and a computer are respectively provided, and each of the above-mentioned storage information can be arbitrarily changed by arbitrarily changing the setting of the superposition code based on the output from the computer. A CRT display device characterized by superimposed display.