SU763884A1 - Data display device - Google Patents

Description

The invention relates to the field of automation and computer technology and can be used to display information on a cathode ray tube (CRT) screen. A device for displaying symbols on CRT screens, a control unit, a buffer memory unit, a CRT device and tube beam control units is known. A disadvantage of this device is its low speed. The closest technical solution to this invention is a device for displaying information containing a control unit whose first output is connected to the first inputs of the first and second registers, the second output to the second A inputs of registers, the third output to one of the inputs of pulse shapers, even A fourth output and an input with a memory unit, the first output of which is connected to the third input of the first register, the second output to. to the third input of the second register, the outputs of the registers are connected respectively to the inputs of the first and second code-voltage converters 1. The disadvantage of this device is its low speed. The aim of the invention is to improve the speed of the device. The goal is achieved by the fact that the device contains a trigger, one-shot and key blocks, the first inputs of which are connected to the first output of the trigger, the second inputs to the second output of the trigger, the third to the output of the first one-shot, the input of the second one-shot and the first input of the trigger, the fourth to the output of the second one-shot and the first input of the first one-shot, the fifth and sixth to the outputs of the code-voltage converters, the outputs to the first and second pulse generator, the second input of the first one-shot is connected to the second Exit the control unit; the second trigger input is connected to the first output of the control unit. The block diagram of the device shown in the drawing. The device contains a control unit 1, a storage unit 2, a first register 3, a second register 4 a flip-flop 5, a first one-shot b, a second one-shot 7, a first converter code voltage 8, a second code-voltage converter 9, the first key block 10, the second key block 11, the first pulse shaper 12, the second pulse shaper 13.

The device works as follows.

When the first pulse arrives from control unit 1, first and second registers 3 and 4 and trigger 5 are reset to zero. When the second pulse arrives from the memory 2, the first register 3 sends the projections of the row length of a small-format television raster to the X axis (E ;;), the second register 4, the projection to the Y axis {E,) and starts the first single vibrator b. The latter produces a square-wave pulse under the influence of each triggering pulse, the duration of which is proportional to the length of the line of a small-format television raster (2J.

The contents of registers 3 and 4 are converted into voltage transducers 8 and 9 into voltages proportional to EX gy, respectively. As a result of pulses coming from the output of the first bis one-shot vibrator output of the trigger 5, blocks of keys 10 and 11 are opened, from the output of which the pulses arrive at the inputs of the drivers 12 and 13.

The pulse duration from the output of the first key block 10 is proportional to the length of the row of a small-format television raster, and the amplitude is. Similarly, the pulse duration from the output of the second key block 11 is proportional, and the amplitude is.

At the end of the pulse produced by the first one-shot 6, flip-flop 5 is launched and the second one-shot 7 is triggered, which produces a square pulse K times shorter than the duration of the pulse of the first one-shot 6.

. K d / e, -,

where d is the distance between adjacent

raster lines.

When a pulse is received from the output of the second one-oscillator 7 and the level from the output of the trigger 5, the first block of keys 10 passes a pulse from the second code converter's code, J9, 9, and the second block of code-11 passes a pulse from the output of the first voltage-8 converter. This is due to the fact that the projections d on the X and Y axes are respectively equal to

cd - d ow (c) -dsinc -stsinc i - 1C e dy: dsirv (Y) -olaost -tcecQ & c -li.

When pulses are received from the lower tires of the key blocks 10 and 11 of the pulse generator 12 and 13, the trace of the electron beam is shifted to the rightmost point of the second row of the raster oriented to the plane at 5 with angle c.

When a pulse arrives from the output of the second one-shot 7, the first one-shot 6 is restarted. In this case, the first block opens.

O keys 10 and at its output a pulse is generated from the first code-voltage converter 8. Accordingly, at the output of the second key block 11, a pulse is generated from the second code-voltage converter 9. Under the influence of these signals, the drivers 12 and 13 move the trace of the CRT electron beam oriented at an angle the second side of the small-format television raster from right to left, etc. until the end of the formation of the last raster line. Thereafter, a signal is generated in control unit 1, which drops the drivers 12 and 13 to zero.

as a result, due to a decrease in the time taken to eject a trace of an electron beam, the speed of the device is improved

Claims (2)

1. Television methods and display systems. Ed. M.I. Krivosheeva, N., Soviet Radio, 1975. 2. Instruments and equipment of the experiment, 5, 1977, p. 107. but Jl / W Y2 / 3 // them