JPS61200587A - Linear image display switch control system for 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 (Field of Industrial Application) The present invention relates to a line drawing image display switching control system for a CRT display used in a graphic device such as a simulator that requires high-speed moving images.

(Prior Art) In graphic devices such as simulators that require high-speed and continuous moving images, n line drawing elements are
There is a method in which images are stored in each memory bank of an image memory having several memory banks and sequentially switched to display images on an RT display.

(Problems to be Solved by the Invention) The conventional method described above has the problem that the capacity of the 9-image memory increases in proportion to the line drawing elements, making the cost of 1-image memory relatively high.

The present invention aims to solve the above-mentioned conventional problems.

A new CRT display image display of line drawing elements is replaced by conventional memory bank switching and color bank switching.
The object of the present invention is to provide a line drawing image display switching control method for an RT display.

(In order to solve the problem, 74 stages 2 In order to achieve the above objectives, the present invention is as shown in the basic configuration diagram of FIG. 1.

(a) A storage means 1 for storing n (=2t) line drawing elements to be switched in t color banks of an image memory as line drawing elements having m (<n) types of different colors.

(b) Only one color among the line drawing elements having colors stored in the image memory is changed to an effective color other than black.

and color conversion means 2 for converting all of the remaining m -1 colors into black blanks.

(C) color selection output means 3 for selectively outputting a predetermined display color in accordance with the line drawing element signal having the color converted by the color conversion means 2;

(d) A display output means 4 for displaying and outputting the line drawing element signal having the display color from the color selection output means 3 on the CRT display 6 as a line drawing image.

(e) a control means 5 for controlling the operations of the storage means 12 color conversion means 21 color selection output means 3 at predetermined timing;

and CR the above line drawing elements as a continuous line drawing image.
The display is switched on the T display.

(Function) Taking as an example a case where the line drawing image to be displayed is the first to seventh line drawing elements P+-P7 and displayed in the order of these line drawing elements P1 to P7 as shown in FIG. Line drawing element P in image memory 1! ~P7 are shown in Figure 4.
~3 color banks t, -t3 are stored.

That is, the first color bank t! 9 time tl, t4゜L
5+ (Line drawing elements to be displayed in 7 P+, P4,
Ps and P7 are stored, and the color of bank tl is R (red).

The second color bank t2 has 9 times tz, t4. t6.
Line drawing element P2 to be displayed at t7. P4. P6.
P, is stored, and the color of bank t2 is G (green).

The third color bank t3 has 2 times 13+ j5+ j6+
j7 line drawing element P1 at time 1. In order to display it on the ORT display, the line drawing element P1 of the first color bank 1 is read out from the storage means 1, and the one color conversion means 2 converts only the line drawing element P1 into an effective color (a color other than black).

Other line drawing elements P2, P3, P4, Ps,
P6 and P7 are respectively converted to black blanks by the one color selection output means 3.

The determined output colors are sequentially sent to the display output means 4.

This display output means 4 displays the line drawing element P on the OR, T display 6 as a line drawing image.

Hereinafter, line drawing element P2 to be similarly displayed from time t2 to t7
~P7 is read out from the storage means 1 and displayed on the CRT display 6.
In the case of line drawing element P4, which is to be displayed in a predetermined display color at 2 time t4.

The first . Line drawing element P4 of second color bank 4 + t2. P4 is read out and the two-color conversion means 2 converts the line drawing element P4 into the first .P4. Pink, which is a mixture of red and green in the second color bank, is converted into an effective color and other line drawing elements P+,
P2, P3. Ps, Ps, P7 are converted to black blanks. Line drawing element P with this effective color
4, an output color is selected by the color selection means 3, and a line drawing image of the line drawing element P4 is displayed on the CRT display 6 by the display output means 4.

Similarly, the line drawing element P5 is the first. Yellow, which is a mixture of red and blue, is in the third color bank, while line drawing element P6 is in the second color bank. The above effects are
The storage means 1 is stored at a predetermined timing by the control means 5.
This is achieved by controlling the operations of the nine color conversion means 21 and the color selection means 3.

(Example) FIG. 2 is a configuration diagram showing one embodiment of the present invention.

An example will be described in which the line drawing element R-P7 shown in FIG. 3 to be displayed as an image is stored in color banks 4 to t3 of FIG. 4.

In FIG. 2, 10 represents three color banks 1. 11 is a display controller that controls the image memory 10 according to instructions from a CPU (central control unit) 50.

20 are signals Co-02 and 0PU50 containing line drawing elements Pl'' P7 from color banks t1 to t3 of image memo IJIO.
The color conversion signal $ sent out via the color conversion latch 21
A comparator that compares ~S2 with the line drawing element Pl''P
If the effective colors to be output for each of 7 match, the line drawing element is color-converted to the matching effective color other than black as a line drawing element signal Y with the others being blanked with black.

30 receives the line drawing element signal Y from the comparator 20 and the designated display colors R (red), G (green), and B (blue) from the 0PU 50 via the output color latch 31,
Output a predetermined display color.

40, 41, and 42 are shift registers for display colors R, G, and B, respectively, which accumulate the line drawing element signals from the buffer 30 according to the display colors, and send them to the 0RT 60 for image display.

Next, the operation of this embodiment will be explained.

Mass OPU 50 c, Display controller 1
1 through 3 color banks t1 of image memo IJIO,
- Store the line drawing element PI-P7 in t2+4 as shown in FIG. Regarding the first line drawing element P1 to be displayed as an image on the CRT display 60, 0PU50
is color bank 1. The line drawing element P stored in is input to the comparator 20 as a readout signal Co. In the comparator 20, the line drawing element P from the two-color bank 11
Upon reception of the signal co of 1, the CPU 50 sends color signals 5o(R), 81(G), 82(B) corresponding to the color of color bank 4 r t2 + Z3 via the color conversion latch 21.
receive.

In this case, 1 color bank 1. By receiving only the color signal So that matches the color red, the signal Co from the color bank t1 and the color signal So are compared and matched.

Time 1. The line drawing element P that matches becomes the effective color of red.

The line drawing element signal Y, which is otherwise converted into a black blank, is sent from the comparator 20 to the buffer 30.

In the buffer 30, the display color signal &(R), Rt(G) is sent from the 0PU50 via the output color latch 31.
, Rz(B) are accumulated in the shift register 40 by the line drawing element signal Y, and this signal is sequentially transmitted to the CRT display 6.
0, an image of the line drawing element P is displayed.

Thereafter, the line drawing elements P2 to P7 are switched in a similar manner, and the CRT display 60 is sequentially switched corresponding to times t2 to t7.
The image will be displayed.

In particular, in the case of each of the line drawing elements P4 to P7, one color bank t
l+t2+t3 are stored in 2 or 3 color banks, so 9 color banks t1+t2 r t
3 outputs signals Co, Of, C2, the color conversion latch 21 outputs color signals So, Ss, 82, and the output color latch 31 outputs display color signals u, a, R2, respectively.

Line drawing elements P4 to P7 shown in FIG. 3 are line drawing elements Pl”P3
Subsequently, the images are sequentially switched and displayed.

(Effects of the Invention) As described above, according to the present invention, when there are seven types of line drawing elements to be displayed in two images as described above, the number of banks for storing these line drawing elements is as follows.

In the present invention, there are 3 elements (lOg28=log2(n+1)), whereas in the past, 7 elements (n) are required, so the memory capacity can be greatly reduced and economical, and line drawing elements can be stored in each bank. This has excellent effects such as the drawing time required for memorization being reduced by the reduction in the number of banks.

[Brief explanation of the drawing]

FIG. 1 is a basic configuration diagram for explaining the present invention, FIG. 2 is a configuration diagram of the same embodiment, FIG. 3 is an explanatory diagram of the first to seventh line drawing elements to be displayed as an image, and FIG. FIG. 3 is an explanatory diagram of a state in which the line drawing elements of FIG. 3 are stored in first to third color bands; DESCRIPTION OF SYMBOLS 1... Storage means, 2... Color conversion means, 3... Color selection output means, 4... Display output means, 5... Control means.

Claims (1)

[Claims] (a) Store n (=2^l) line drawing elements to be switched in l color banks of the image memory as line drawing elements having m (<n) different colors. (b) a color for converting only one color for each of the line drawing elements stored in the image memory into an effective color other than black and converting all of the remaining m-1 colors into a black blank; (c) a color selection output means for selectively outputting a predetermined display color according to a line drawing element signal having a color converted into an effective color by the color conversion means; (d) the color selection output display output means for displaying line drawing element signals having display colors from the means as line drawing images on a CRT display; and (e) control for controlling the operations of the storage means, color conversion means, and color selection output means at predetermined timings. means, and CR the above-mentioned line drawing elements as a continuous line drawing image.
A line drawing image display switching control method for a CRT display, characterized in that the display is switched to a T display.