JPH01295111A - Image control method for image display instrument - Google Patents

Abstract

PURPOSE:To rotate or move up or down an image and display it without increasing the load on a CPU by extracting the address of a corresponding part from image information according to image rotation angle information and up-down movement information. CONSTITUTION:The arithmetic processing part 1b of an image rotation angle and up-down movement information output part 1 reads a value corresponding to external rotation angle data R out of an image pattern storage part 1a and combines and adds it according to up-down movement information which is inputted separately to output image rotation angle and up-down movement information. Then, address counters M and N of an address signal output means 2 while inputting said image rotation angle and up-down movement information inputs a clock signal CK and outputs an address signal for controlling the extraction and read of the address of a corresponding part out of image information more than an image which is stored on an image ROM 3 and displayed on a display device according to the rotation angle and up-down movement information. Consequently, display image information C is outputted from the image ROM 3.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention uses a display device (electronic display) such as a CR"11 LCD (liquid crystal display device) to display double-image graphics,
For example, AI for aviation instruments (ATTTTUDE IND
The present invention relates to image display instruments such as ICATOR), and in particular to image control means for image display instruments that can display graphics at high speed with image rotation angle and vertical movement of the image display instrument. In the following description, an aircraft AI display instrument that displays an attitude figure will be specifically explained as an example of image display.

[Conventional technology] The conventional technology will be explained below with reference to the drawings.

FIG. 5 and FIG. 6 are diagrams for explaining the conventional technology.

In FIG. 5, the AI display on the display device consists of a plurality of display elements. The circular celestial sphere part α is the part that displays the attitude.

Figure 6 shows a developed view of the celestial sphere. The celestial sphere in FIG. 6 sequentially rotates and moves up and down (for example, the display data is updated from 20 to 40H2 for aircraft control). A broken line portion αa in FIG. 61 corresponds to the celestial sphere portion α in FIG.

A specific display process for making the broken line portion αa correspond to the celestial sphere portion α is performed using a CPU not shown here. In other words, ■: All the figures and characters in the expanded view of the celestial sphere in Figure 6 are decomposed into line data, and then all the decomposed data is subjected to calculation processing of rotation and movement; ■: Or character data is converted into line data. Prepare a font rotated every 2 degrees, select an appropriately tilted font, and display it.

[Problems to be Solved by the Invention] The image control means of this conventional image display instrument has the following problems.

■: CPU processing time is proportional to the number of data. Therefore, the more complex the processing content, the longer the processing time will be.
The burden on PtJ will be heavy. In other words, the real-time nature of complex pictures (characters) such as maps is lost, so the possibility of realization becomes slim. In extreme cases it becomes impossible.

(2): A large number of character fonts are required, a large amount of storage capacity of a storage element such as a read-only memory (ROM) is required, and the effect on character strings is relatively small.

After all, if we consider Figure 6 as one picture, we can see that part αa
As mentioned above, the display processing is a heavy burden on the CI'U and requires a large amount of RoM.
It is unreasonable that it is necessary to use t.

The present invention has been made in view of these problems of the conventional technology, and its purpose is to
To provide an image control means for an image display instrument that cuts out a part of a celestial sphere and displays it at least in rotation and vertical movement on a display means, for example, a CRT, without burdening or increasing the burden on the user.

[Means for Solving the Problems] In order to achieve the above object, the image control means of the image display instrument according to the present invention displays a predetermined image based on at least two data inputs inputted from the outside: rotation angle data and vertical movement data. an image rotation angle/vertical movement information output unit that performs arithmetic processing on the pattern and outputs image rotation angle information and vertical movement information; an image storage unit that stores image information beyond the image displayed on the display device; An address for inputting angle information and vertical movement information and outputting a signal for extracting and reading an address of a corresponding portion from among the image information stored in the image storage means based on the image rotation angle information and the vertical movement information. The device is characterized in that it consists of a signal output means.

[Example] Examples will be described with reference to the drawings.

FIG. 1 is a block system diagram of an image control means of an image display instrument that is a specific embodiment of the present invention.

In FIG. 1, 1 is an image rotation angle/vertical movement information output section. This image rotation angle/vertical movement information output unit 1 is
O3 (R), S IN (R), K・CO8CR+45
) and -8IN (R+45°) (where, R is the rotation angle [Ro I I ] data, K is a constant (a constant value unique to the display device, and here = (2) I/2・I7, L, is the number of pixels on one side of the display area) angle 5IN-
A storage unit 1a consisting of four storage devices (ROM) 1aj to 1a4 that store CO3 values as tables, and a storage unit 1a that receives input from the outside - 4 Reads and inputs values corresponding to one rotation angle data R from the storage unit 1a and an arithmetic processing unit 1b comprising, for example, an addition/subtraction element, which performs arithmetic processing such as combination and addition based on the vertical movement [Pitch] data P and outputs image rotation angle information and vertical movement information signals. The arithmetic processing unit 1b includes, for example, a first addition unit 1b that adds the readout output of 5TN(R) from the storage unit 1a, the successive output of -CO3(lR+45°), and the value of the previous addition result; , a second addition means 1b2 that adds the output from the first addition means 1b1 and the readout output of C08(l() from the storage section 1a, and the storage section 1
At the same time as continuous output of CO8(R) from a, 5IN(R+
45°) and the value of the previous addition result; and a fourth addition means 1b3 that adds the output of the third addition means 1b3 and the readout output of 5IN(R) from the storage unit 1a. addition means 1b4. By doing so, the values of the address counter N and the address counter M of the address signal output means described below are generated according to the words of the rotation angle data R and the vertical movement data P, for example. At this time, the algorithm of the image rotation angle/vertical movement l information output section 1 is as follows.

■■■ M=H+OH Note that the values of each equation may change depending on how the coordinate system of the system is taken, but this is a matter of design.

At this time, the loop (■) is generated every clock (~10MHz
) The loop of ■ needs to be executed every horizontal sweep (~21KHz) The loop of ■ needs to be executed at every screen scratch (~4011z), but ■ is added once for each M and N counters, and ■ is N
Add once with the counter Add twice with the 1M counter, ■ is M,
Add one time with N counter.

The amount of calculation is 1 multiplication and 32 SJN/CO times.Especially in ■, K is a constant, so together with sIi;cos, all the tables and deviations can be converted to R,0M in a separate ROM, and the total is just an addition. Through operation, signals for the rotation angle and vertical movement of the celestial sphere can be obtained. 2 is address signal output means. This address signal output means 2 inputs the rotation angle information and vertical movement information from the image rotation angle and vertical movement information output section 1, and also inputs the clock signal (basic clock for synchronization signal 1 image) Ck to store the image. Means (hereinafter referred to as image ROMJ) 3
Outputs an address signal for controlling extraction/reading by scanning the address of the corresponding part based on the rotation angle Im° information and vertical movement information from among the image information stored in the image information that is greater than or equal to the image displayed on the display device. For example, it consists of address counters M and N. That is, the M and N values are controlled so that the M and N counters are incremented by 1 or decremented by DNDM or by 1 to 1 or decremented every 1 clock corresponding to 1 pixel. As a result, from image R0M3, address counters M, N
Based on the address signal from , image information ( For example, image data for CRT [image creation], U/V [U: horizontal signal, ■= serial data of vertical signal value] is output as display image information C. Therefore, images (postures) can be displayed easily.

FIGS. 2 and 3 are diagrams for explaining FIG. 1.

When R=O' and P=O' as shown in FIG. 2 (A) 4::, the broken line portion αa1 of #ROM 3 is drawn as shown in FIG. 2 (A) (i). The celestial sphere map is displayed on the display device as shown in FIG. 2(A) and (iii) as a serial data output by scanning normally and cutting out/reading as shown in FIG. 2(B). , P
= 10°, the image ROM 3 is read and scanned diagonally as shown in αa2 as shown in (B) <i) in the same figure (B) (i), and is cut out/continued as serial data output.
As shown in li), a celestial sphere map that has been moved downward by 10 degrees with an inclination angle of 30 degrees is displayed on the display device. At this time, other AI symbols that do not require rotation or movement are displayed separately and overlappingly.

FIG. 3 shows a simulation when the posture is rotated and moved according to the algorithm described above. This is (Zoo, 1
00), the array is accessed using the M and N values of the algorithm, and sequentially output on a CRT. That is, in the same figure (A), when p=o°, R
=Q° [same figure (A) (i)], R=30'
[Figure (A) (II)] and ]゛R-60° [Figure (A) (iii)] are respectively shown, and Figure (B) shows R-60° when P-10°. 0° [Figure (B) (i)
], R=30° [(B) (ii) in the same figure], and R=
60° [(r:3) (fil)] in the same figure.

[Other Examples] The present invention is not limited to the configuration shown in FIG. For example, since the image pattern extraction operation in the image rotation angle/vertical movement information output section in Fig. 1 is about 4o times/sec, each 5IN
- Without storing the CO3 value in the storage unit and performing addition/subtraction processing, the calculation method is stored in the ROM, and the calculation method is stored in the ROM. It may be determined by sequential calculations, and the address signal output means is driven in accordance with the calculation results to cut out/read and scan a part of the large storage image in the image ROM and output it to the display device.

However, the computational power of CP tJ in this case is quite large. However, as in the past, everything is run on the CPU.
This provides a considerable amount of leeway in the CPU's capacity compared to methods that rely on. Further, the display device is not limited to the above-mentioned CRT, and it goes without saying that a conventionally known device such as an LCD may be used. Moreover, as mentioned above, the invention is not only applicable to AI display instruments, but also to displays known in the shell. For example, as shown in the diagram for explaining other embodiments in FIG. It can be used. In this case, horizontal movement data is also required, so the horizontal parameter S
By inputting "'N-to 80'" into the loop (4th line) of the algorithm, the ROM patterned map can be displayed by rotating, moving up/down, left/right as desired.

Taking FIG. 1 as an example, the specific configuration at this time is that the left and right movement data S
The configuration may be such that the following is input. Even in this case, the execution time may be the same as that for the AI display.

[Effects of the Invention] Since the present invention is configured as described below,
This produces the following effects.

■：Conventional LIN, such as complicated diagrams and picture patterns
Even if it is a combination of E, PS[T, PAINT (sentences or commands), it can be easily rotated and moved up and down (and even left and right) for display processing. That is, in the past, the more complicated the display on the display, the more time it took to calculate the rotation, up/down, left/right movement display, or it was impossible to do so. , this constraint also works, and all can be displayed in the same cycle.

■: In the case of Fig. 1, the burden on the CP tJ is significantly reduced, so the necessary CPU functions can be used for other tasks.

[Brief explanation of the drawing]

FIG. 1 is a block system diagram of an image control means of an image display instrument which is a specific embodiment of the present invention, and FIGS.
FIG. 4 is a diagram for explaining another embodiment, and FIGS. 5 and 6 are diagrams for explaining conventional techniques. 1... Image rotation angle/vertical movement information output section, 2... Address signal/signal output means, 3... Image storage means (image (i)
R′″”C
QFigure 4Figure 6-78=

Claims (1)

[Claims] an image rotation angle/vertical movement information output unit that performs arithmetic processing on a predetermined image pattern based on at least two external data inputs, rotation angle data and vertical movement data, and outputs image rotation angle information and vertical movement information; and a display. An image storage means for storing image information beyond the image displayed on the device; and inputting the image rotation angle information and vertical movement information, and storing the image rotation angle information from among the image information stored in the image storage means. and address signal output means for outputting a signal for extracting and reading an address of a corresponding portion based on the vertical movement information.