RU1807518C - Graphic information output unit - Google Patents

Abstract

Usage: areas of automation and computer technology, information display systems on a CRT screen. The inventive device comprises a pulse generator, two counters (dots and lines), two AND elements, two decoders, two triggers, an adder, a television indicator, a photoelectric converter, a frequency adjustment unit, a shift register, an element NOT, an OR element, groups of elements And, 2 ill.

Description

The invention relates to automation and computer technology and can be used in information display systems on a CRT screen.

The purpose of the invention is to improve the accuracy of the device and improve operational capabilities.

In FIG. 1 shows a block diagram of a device; in FIG. 2 is a diagram of a frequency adjustment block.

The device contains a pulse generator 1, a counter of 2 points, a counter of 3 lines, elements of the first 4 and second 5 groups, the first 6 and second 7 decoders, triggers 8.9, shift register 10, the first element 11, adder 12, television indicator 13 , photoelectric converter 14, frequency adjustment block 15, second element AND 16, element NOT 17. element OR 18.

Numbers 19 and 20 indicate the first information input, 21 and 22 indicate the outputs of the request signals, 23 indicate the second information input, 24 and 25 indicate the first and second control inputs of the device.

The frequency adjustment block 15 contains the elements And 26-29, a counter-register 30 (coordinates), a reverse counter-register 31 (clock frequency) and a digital-to-analog converter 32.

The device operates as follows.

The generator 1 generates pulses with a frequency corresponding to the required discredit of the screen raster of the indicator 13 horizontally. These pulses are fixed by the counter 2 and the register 10, carried out the shift. Information entered into it from the computer. The capacity of the register 10 is equal to the word width of the memory. The counter 2 recounts the pulses in accordance with the indicator raster 13. The signal from the high-order output of the counter 2 recounts the lines in the counter 3 in accordance with the frame scan of the indicator 13. Based on the signals of the counters 2 and 3, the decoder 6 generates control signals for writing to the register 10 and triggers 8 (rows) and 9 (frames).

Element And 11 according to the signals of register 1. and the inverse outputs of the highest order count (L

WITH

with

ABOUT

 ate

00

Chikov 2 and 3 generates a video signal with the horizontal and frame protective bands mixed in it. This video signal, together with the horizontal and vertical sync pulses of the triggers 8.9, is converted by the adder 12 into a standard video signal fed to the video input of the indicator 13.

The decoder 7 by the signals of the counter 2 through the elements 4 And requests the next word from the computer memory in accordance with the time with the shift of the previous word in the register 10, and at the address with the status of the corresponding bits of the counters 2, 3. Request the next word and issue the address in computers are allowed during the visible course of the horizontal and vertical scanning beams.

The stabilization of the time of the horizontal reference driving circuits is implemented as follows.

Preliminarily, a transducer 14 is installed in the corresponding area of the screen of the indicator 13 so that rays of the right and left points placed on the same line as the step defined in block 15 cannot be reached. the aperture of the photodiode of the transducer 14. To do this, the counter-register 30 at the input 23. The command from the input 24 at the signal of the decoder b sends the coordinate of the left point in the code corresponding to the number of clock cycles to the end of the line and the number of lines to the end of the frame through the And 26 element. In this case, the overflow of the counter register 30 occurs in the area of the left point. After a given number of clocks (points) corresponding to the position of the right point relative to the left and determined by the aperture of the photodiode of the transducer 14, a second pulse is generated by a certain connection of the 1 / Г27 element with the corresponding outputs of the counter-register 30. These two pulses form by means of the adder 12 video signals backlight at the corresponding points on the screen of the indicator 13.

When collecting the horizontal scan, the formed control points are shifted either to the right or to the left on the screen, while one of them falls into the aperture of the photodiode of the transducer 14, the output of which interrogates one of the And 28.29 elements, shifting the contents in the register 31 to the corresponding side and By changing the frequency of the generator 1 by means of the converter 32, it will be possible to shift the control points on the screen of the indicator 13 to the opposite side.

In this manner, horizontal scanning is stabilized by fairly simple means. Moreover, due to

the ability to disable the information channel at the time of monitoring by breaking the circuit from the element And 11 to the adder 12 element And 16 according to the signals of block 15

through the elements of OR 18 and 17 it does NOT become possible to place the converter in almost any area of the screen of the indicator 13 without distorting the results of the control and with the reliability of frequency control

generator 1. This achieves certain conveniences in using the device and its increased accuracy in operation.

Claims (1)

The claims A device for outputting graphical information containing a pulse generator, the output of which is connected to the counting input of the counter. Points and the shift control input of the shift register, information the input of which is the first information input of the device / the output of the shift register is connected to the first input of the first element And, the second input of which is connected to the first output of the point counter connected to the first inputs of the elements And of the first and second groups, the second inputs of which are connected to the first output of the line counter connected to the third input of the first element AND, the second output of the point counter is connected to the counting input of the line counter, the second output of which is connected to the control input of the first decoder, the first and second Exit which are connected respectively to the inputs of the first and second triggers, the outputs of which are connected to the first and second information inputs of the adder, the third and fourth, information inputs of which are connected respectively to the first and to the second outputs of the frequency adjustment unit, the third output of the first decoder is connected to the control input of the shift register, the first sync input of the frequency adjustment unit is connected to the output of the photoelectric converter optically connected to the television indicator screen, the input of which is connected to the output of the adder, the third output of the frequency adjustment unit is connected with control input pulse generator, the third output of the point counter is connected to the information inputs of the first and second decoders, the outputs of the second decoder are connected to the third inputs of the elements And the first group, the outputs of which and the outputs of the elements And the second group are the outputs of the request signals of the device, the outputs of the group of points counter are connected to third inputs of one of the elements 1/1 of the second group, third inputs of other elements AND the second group connected to the outputs of the row counter group, the information input and the control inputs of the frequency adjusting unit are respectively the second information input and the first and second control inputs of the device, characterized in that, in order to increase the accuracy of the device and improve its operational capabilities, it contains the second AND element, the OR element, and the NOT element, input which is connected to the output of the OR element, the inputs of which are connected to the first and second outputs of the frequency adjustment unit, the second clock input of which is connected to the third output of the first decoder, and the clock input is connected to the output of the pulse generator, the inputs of the second element And are connected to the outputs of the first element And and element NOT, the output of the second element AND is connected to the control input of the adder. 21 2f Fa g Editor S. Kulakova Compiled by I. Zaginaiko Tehred M. Morgenthal Corrector S. Lisina g //