JPS58184185A - Graphic display circuit - 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 The present invention relates to a graphic display circuit, and more specifically, to a so-called image communication system that directly reads arbitrary graphic information by applying the principle of facsimile and displays it directly on a CRT display or the like. - The present invention relates to a display circuit in a picture retrieval system, etc., which records the graphics information in a storage device, reads it out when necessary, and displays it on a CRT display.

In order to apply the principle of facsimile to read arbitrary character and graphic information, a degree of resolution of approximately 8 dots/- or more is required.69
, - For normal facsimile transmitters, the short side of A4 paper is 172
8 dots, long side approximately 2300 I) in (in high resolution mode). On the other hand, even a rounded CRT display line that displays characters and graphics, which is said to be a high-resolution display and has twice the resolution of a normal display device, has a resolution of at most 1000 dots x 1000 twins. Therefore, if one dot when reading a figure is made to correspond to one dot on a CRT display, the high-resolution display will only be able to display the width of an A4 size document.

For this purpose, in the 1iii image communication service or the 1lii image retrieval system, the entire document is grasped, and when the document is round, four dots when reading a figure correspond to one dot on the CRT display, and a nine-reduced display is performed. Furthermore, when it is not possible to show a more detailed point, the two dots are made to correspond to each other so that an arbitrary position on the document can be displayed. This display method that allows displaying any position on the document is hereinafter referred to as scroll display.

However, in a video conference system, etc. conducted between remote locations, there are cases where characters and figures input using the above-mentioned image communication service are immediately displayed on a CRT display at a remote location and used as meeting materials. Various problems arise when using an overhead projector. The first is that the arbitrary figure is A, as shown in Figure 1 (&) and (b).
It is possible for documents to be written in parallel on both the short and long sides of the 4th edition document, and it is also possible to input the manuscript upside down. In such a case, the characters and figures displayed on the screen of the CRT display, indicated by broken lines in the figure, may be rotated by 90 degrees, or the top and bottom may be reversed. In such a case, the easiest way to correct the problem is to correct the orientation of the manuscript and resend it, or to edit the manuscript. Therefore, in a case like jin, the input iii is electrically 90°, -
A function to rotate the image by 90 degrees or 180 degrees and display it on a CRT display may be added.

However, by adding the above-mentioned rotating display function, there is a problem in how to scroll the display to the new nine. That is, the general method of scrolling display is to display the input document on a CRT.
This is done by moving the display position on the display left, right, up, or down, and is usually done using the operation buttons on the operation panel. If a rotation display function is included, and functions such as operation buttons are fixed relative to the input document surface, the movement of the displayed content and the operation of the operation buttons will not match, impairing operability. Pa.

The present invention has been made in order to eliminate the above-mentioned drawbacks inherent in the prior art, and therefore, an object of the present invention is to match the functions of the operation buttons to the display on the cmt display, and at the same time change the display position. The company aims to provide a new "graphic display circuit" that can be used as an alkaline display.

The object of the present invention is to provide a graphic display circuit that directly reads any graphic by applying the facsimile principle and displays it on a display such as a CRT display, which includes a storage device for storing input graphic information; A readout circuit that stores an arbitrary position on the nine figures in a storage device K and reads out as much as necessary to display the nine figures on the display '6;
Equipped with a rotation circuit that rotates 9G', -90°, and 180° and outputs it to the display, and an operation panel for instructing the rotation and display position on the display, and supports rotation instruction operations on the operation panel. The operation of the rotation circuit is controlled by controlling the operation of the rotation circuit, and furthermore, signals corresponding to the display position operation and rotation instruction operation are applied to the readout circuit, and the readout circuit adjusts the display position based on the orientation of the screen being displayed on the display device. A graphic display circuit that adapts the function of the operation button to the display on the CRT display by reading out graphic information of the user's position from the storage device, and/or input graphics; The information is located at addresses (0,0), (D,
o), (0, L), ω, L) (D is the number of dots in one line, L is the number of twins), and the display range on the display is P dots in the horizontal direction and L lines in the vertical direction. , Furthermore, when a display position operation is performed such that the display position on the display is set at (X%y) on the input figure as the origin, the rotation operation instruction is θ°, X' zx, · Y' -7% P'
-P% Q'=Q, when the rotation operation instruction is 90° clockwise rotation, )('xy.

" = L-P-"NP' -Qs Q'-ps When the rotation operation instruction is 90° left rotation, X' -D -Q -7
% Y' = "SP' - Qs Q' = When the P1 rotation operation instruction is 1000 rotations, X'-D-p-x, Y'
= L-Q-ys p'gp, Q'WQ, and convert the storage device (x', Y'), (X' +P
MiYtsu, (x', Y' + Q'), (Xl+P', Y
This is achieved by the graphic display circuit K, which performs the change of the display "quantity" by controlling the readout circuit to sequentially read out the data in the area '+Q'>.

Next, a preferred embodiment of the present invention will be specifically explained with reference to the drawings.

Figure 2 shows an example of a graphic display circuit according to the present invention.
0 is converted into a stain signal and once 'storage device ff:
stored in n. At this time, the form input to the storage device is shown in Figure 3 (&) - ( depending on the writing style and orientation of the manuscript.
There are four ways shown in d), respectively 0', +90°, -90
By rotating it clockwise by ζ180°, it can be read normally. Also, move up from the upper left corner to the upper right corner. If you express the memory address in coordinates, the upper left - is (o, o)
, the upper right corner is ψ, '0), the lower left corner is (0, L), and the lower corner of b is (D% L) = Here, D is the number of dots in the i-side direction, and L is the long side' direction. The number of lines is □.

A method for controlling the start point address by the readout circuit 30 will be described later.

Rotation instruction information 41 corresponding to the shapes shown in the tiga diagrams (a) to (d) is input to the rotation circuit 40 from the operation panel 70.
The input data is rearranged according to the scissor rotation information and sent to the buffer memory SOK. The buffer memory sO is a storage circuit that stores one screen of data to be output to the display 60. ! This data continues to be sent to the display 60 at intervals of &. The display 60 displays text and graphic information on both strokes.

Now, the operation of the readout circuit 30 will be explained. The reading circuit 80 receives #i from the operation panel 70 the origin coordinates (or address) of the rounding of the school display (xs
y) is input.

In this case, the coordinate (1% y) is indicated by the broken line in FIG. It's facing towards you. That is, the origin of the xSy axis of husband ~ in Figure 3 is (0,
0). The rotation instruction information 41 is further input to the readout circuit 30 . At ζ, the readout circuit 30 displays the display 60Kl! When the number of dots in the horizontal direction and the number of lines in the vertical direction that can be displayed are respectively P%Q, Fig. 3(&)K
When the corresponding rotation information 41 is input, Xl m z, 7' sa 7. p' wm p,
Perform the transformation Q' m Q, and similarly, as shown in Figure 3(b)
Corresponding to K, X' w y, Y' ML -P -z
, P' W Q, Q' = p.

Fig. 3(e) Corresponding to K, x'=D-Q-ys Y'zx, p'sgQs Q'
-ps Fig. 3(d) Corresponding to K, X'5D-P-X, Y'WL-Q-F, p'xp1Q'
A transformation xQ is performed. After that, the (
X', Y'), (X'+P', Y'), (x', Y'+
Q'), (x'10p', y'+Q) reads data within the range of one bottle, and exits to the rotation circuit 40.

As a result of the above operations, the range displayed on the display 60 is the same (x, %y) as indicated by the broken line in FIG. of, vj
K is set so that five KIs are performed on the ox and y axes in iA. −
Therefore, changes in coordinates (xSy) are not defined with respect to the display screen, and operability is greatly improved.

Although the present invention has been described above with reference to one preferred embodiment thereof, this is merely an example. ), and furthermore, it is possible to apply the display device 60 to a remote location.

[Brief explanation of drawings]

Fig. 1 is a rounded diagram for explaining arbitrary figures and the display on the display, Fig. 2 is a pop-up diagram showing an embodiment of the figure display circuit according to the present invention, and Fig. 3 is a diagram showing the inside of the storage device. FIG. 2 is a diagram for explaining input graphic information and a range to be displayed on a display device. 10... Input device that applies the principle of facsimile. 20...Storage device, 30...Readout circuit J1...Signal for switching, 50...
...Buffer memory, 60...Display device, 7
0......Operation panel (a) (b
) 70,. Figure 2 (0) No.'' (C) 1st, , . (b) - Y' 嘗 (d) -゛・Figure 3

Claims (2)

[Claims] (1) Directly connect any figure by applying the principle of faxing, and connect it to a display device such as a CRT or D2 display. a storage device for storing input graphic information in the graphic display circuit shown in the figure; a readout circuit stored in the cough memory device and reading out as much information as necessary to display an arbitrary position on the graphic on the display; The arrangement of the figures read out from the storage device by the control of the readout circuit is 00.90°,
- Equipped with a rotation circuit that rotates 900, 18G' and outputs it to the display, and an operation panel for instructing the rotation and the display position to the permanent device, and the above-mentioned The operation of the rotation circuit is controlled, and a large signal is applied to the above-mentioned readout circuit in response to the display position operation and rotation instruction operation, and the display position is changed by the readout circuit based on the internal elements of the screen being displayed on the display device. 9. A graphic display circuit characterized in that the graphic information on the wrinkle position is read out from the storage device. (2), the input graphic information is located at address (0) in the storage device.
, 0), (D, 0), (0% L), (D, t,)
, (D is the number of dots in the l twin, L is the number of twins), the display range on the display is P dots in the horizontal direction, L lines in the vertical direction, and the display position on the display is the input figure. When the display position operation is performed such that the origin is at the upper (xly), and when the one rotation operation instruction is O'4D, Xg
X, Y' = 7. p' m pSQ' m Q
, when the rotation operation instruction is 90' clockwise rotation, X' WF,
Y'-L-P-xSP' zQ, Q'=P1 When the rotation operation instruction is 90' clockwise rotation, x'SeD-Q-"Is
Y'-X1P' -Qz Q' = P When the % rotation operation instruction is 180' rotation, X' = D-P-x, Y'
w-L-Q-y, P' = p. Performs the transformation Q'=Q, and converts (X',
Y'), (X' + P', Y'), (X',
Claim (1) further includes the fact that the 2tk readout circuit above controls the data in the areas Y' + Q') and (x' + p'.Y'+Q') to be sequentially read out. Graphical display circuit described in section.