SU1381583A1 - Device for displaying graphics data - Google Patents

Abstract

The invention relates to the field of automation and computer technology, in particular, to a technique of displaying graphical information on a screen of a cathode ray tube with a raster method of scanning an image. The aim of the invention is to simplify the device, which is achieved by the introduction of the buffer memory block 7, the comparison blocks 4 and 5, and the UNEQUALITY element 8 with the corresponding functional links. A reduction in the amount of memory required to form a graphic image is provided. During the return stroke of each line, the coordinate A of the point displayed in this line is rewritten from memory block 3 to buffer storage block 7. The coordinate A coming again from memory block 3 is compared with the linearly increasing binary code in the first comparison block 4 and with the previous coordinate A recorded in the buffer memory block 7, which allows. 1 Learn on the screen of the video monitor unit 6 a continuous curve formed by segments of horizontal lines. 1 il. C (L

Description

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The invention relates to automation and computing, in particular, to a technique of displaying graphical information on a screen of a cathode ray tube with a raster image scanning method.

The purpose of the invention is to simplify the device.

The drawing shows the functional diagram of the device.

The device contains a synchronizing generator 1, an address counter 2, a memory block 3, a comparison block 4 and 5, a video monitoring block 6, a buffer memory block 7, a UNEMINABLE item 8 and a beam position coordinate counter 9.

The device works as follows.

The sync generator 1 continuously generates signals from lowercase FIDs and personnel sync pulses XI and damping pulses GII and OIG, which enter the video monitoring unit 6. At the same time, the other pulses of the sync generator I receive the corresponding pulses for counting the raster lines to the inputs of the 2 address counter and for counting the elements of the line at the inputs of the counter 9 coordinates of the beam position in each row of the raster.

In accordance with the line code at the outputs of memory block 3, the coordinate code displayed in this line is displayed, and the acces- sions to the corresponding inputs of the first comparison unit 4 and buffer storage unit 7. At the same time, the corresponding groups of I (zdov blocks 4 and 5 of the comparison receive the linearly increasing code from the counters 9 coordinates of the beam position on the screen video block 6 for their COPOS1 ||| codes with the read from block 3 memory and block 7 Buffer memory. Writing information into the block 7 of the buffer memory from the outputs of block 3 of the memory of the secondary unit in the Internet; 1x of the time allotted to perform the ray retrace, after which the line changes. Therefore, the EU, 1i and the current of the beam path on the inputs of the Blyuk 3 of the memory appear the current value of the code of the signal being visualized, then the output of the buffer memory unit 7 appears in its previous value whose0

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block 3 of memory. Comparison of output signals of blocks 4 and 5 of the comparison is carried out by the UNEQUALITY element 8, at the output of which a signal is generated allowing the display of a continuous straight line in that part of the line where the results of the comparison of the position code of the beam with the current and previous values of the code () in the parameter being visualized are not match up . As a result, a graphical curve of the visualized meter is represented on the screen of the video monitor unit, represented not by points, but by straight line segments horizontally along the corresponding raster line and connecting every two adjacent points of measured values of the parameter being visualized.

Claims (1)

Invention Formula A device for displaying graphical information containing an address counter, a memory unit, a beam position coordinate counter, the clock input of which is connected to the first output of the clock generator and a video monitoring unit whose synchronous input is connected to the second output of the clock generator, the output of the address counter is connected to the address input of the memory block In order to simplify the device, it contains a block of buffer memory, the first and second blocks of comparison, and the UNEMINABLE element whose output is connected to the video input video control unit, the first input of the UNEMNATABILITY element is connected to the output of the comparison unit, the first input of which is connected to the output of the buffer memory block, whose information input and the second input of the comparison unit are connected i) i to the output of the memory block, the second input of the second the comparison unit and the first input of the 1K) 1 (the comparison unit is connected to the output of the coordinate meter of the beam position, the output of the first comparison unit is connected to the second input of the element, UNEMINABLE, the write control input of the buffer memory block is connected to retemu syn- hrogeperatora output, the fourth output of which is connected to the clock input of address counter.