SU1357944A1 - Video signal forming device - Google Patents

Abstract

The invention relates to a technique for graphically displaying information obtained using a computer, and can be used to generate functional dependency graphs. The aim of the invention is. The increase in the accuracy of the device, achieved by increasing the pulse of illumination and the spot of light. An increase in the pulse of illumination for the raster line is provided by the introduction of a single vibrator. The combination of the pulses of illumination of adjacent lines of the raster is carried out using a single-shot, two registers operating in antiphase, using a switch and an OR element. 2 Il. CO sd -sj with 4

Description

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The invention relates to a technique for displaying information corrupted by a digital computer and can be used to generate functional dependency graphs. five

The aim of the invention is to improve the accuracy of the device.

FIG. 1 shows a block diagram of the device; in fig. 2 shows an example of a mapping of a part of a circle using a device for generating a video signal.

A device for generating a video signal contains an address counter 1, a memory block 2, device inputs 3, first register 4, synchronizer 5, pulse generator 6, device output 7, one-shot 8, switch 9, second register 10, third register 11, OR element 12 and computer 13.

The address counter 1 serves to form the address code of the polled cell of the memory block 2.

Block 2 is used to store fragments of signals from which an image is then formed.

The control computer is used to form the addresses of points of a particular curve and record these addresses in memory block 2.

The device works as follows:

The scan of the data array from the memory block 2 to the CRT screen (not shown) j is carried out in two steps. First, the contents of the memory cell 2 of the memory 2 are written into the corresponding bits of the shift register 4, with some anticipation of 40 relative to the beginning of their output to the screen. Then, with the help of pushing pulses from synchronizer 5, the output of the sequential code from register 4 to one-shot 8 begins, which increases the duration of the pulses to the required value determined by the size of the generated light spot on the CRT screen.

Thus, the spot size increases along the line. The one-shot 8 is triggered on the falling edge of the signal. This makes it possible to increase the number of discrete elements of the raster, and in this 55 case, the elements recorded in block 2 of the memory determine only the coordinate of the location of the beginning of the spot, and not

13579442

its size. Increasing the spot size vertically is done by repeating the corresponding sig-. in the next line. For this, the signal of the previous line is expanded by a predetermined amount by the one-shot 8 and arrives at the first input of the OR 12 element. The same signal after a delay organized by the switch 9 and registers 10 and 11 is fed to the other inputs of the OR 12 element. Registers 10 and 11, working in opposite phase, write to the current register in one register, for example, register 10, and read the previous line from the other (for example, from register 11), then they change. Alternately, writing to registers is performed using a switch 9 controlled by a synchronizer.

Claims (1)

Invention Formula A video signal generating device comprising an address counter, the output of which is connected to the address inputs of a memory unit whose information inputs are device inputs, the outputs of the memory section are connected to the information inputs of the first register, the control input of which is connected to the first output of the synchronizer, the second output which is connected to the counting input of the address counter, and a pulse shaper, the output of which is the output of the device, characterized in that, in order to increase the accuracy of the device, it A one-shot, switch, second and third registers, and an OR element, whose output is connected to the input of a pulse former, are connected; the first input of the element is connected to the output of a one-shot, connected to the information input of the switch, the first and second outputs of which are connected the outputs of which are connected respectively to the second and third inputs of the OR element, the control inputs of the second and third registers are connected respectively to the third and fourth outputs of the synchronization ora, a fifth output is connected to the control input of the switch. 9ut.1 / X g% w Sh J a} Publisher 6) Prev /} agioe sostaastdo