SU537364A1 - Device for displaying information - Google Patents

Description

one

The invention relates to the field of automation and computer technology and can be used in the construction of devices for displaying graphic information on cathode-ray tubes.

Devices for displaying information 1J are known, in which the elements of the image are drawn by approximating them with straight-line segments or dots.

The disadvantage of these devices is the long time it takes to form images.

It is also known the device closest in technical solution to the invention, comprising a generator associated with an inverter, as well as a serially connected receiving register and a switch connected respectively to an imaging unit associated with a cathode ray tube, through the line code register - to a decoder connected to the illumination unit and a phase encoder, an antenna connected to the imaging unit, and through the illumination register to the illumination unit associated with the imaging unit.

This device has such a disadvantage as the constancy of the time of drawing any image elements, regardless of their geometry (circle, ellipse, arc, straight line segment), which essentially limits the speed of the device.

The proposed device is characterized in that it includes an element AND, two keys, a trigger and an element OR associated with the keys, a phase shifter, an imaging unit and a trigger connected through the element AND to the decoder and the light unit, one of the keys connected to the generator directly as well the other is through an inverter.

This makes it possible to increase the speed of the device.

The drawing shows a block diagram of the proposed device.

The device contains a code bus 1, iriem register 2, switch 3, register 4 code lines, register 5 light, generator 6, decoder 7, block 8 light, ivertor 9, element 10, trigger 11, keys 12 and 13, phase shifter 14, the element OR 15, the imaging unit 16, the cathode ray tube 17.

The device works as follows. On code bus 1, the data characterizing the line to be drawn go to the receive register 2 and then distributed through the switch 3 between the li-code register 4, the illumination register 5 and the imaging unit 16.

When drawing circles and their arcs in

according to the code accepted on register 4

line code, the output of the decoder 7 generates a signal that enters the light block 8 and the phase shifter 14. The sine-shaped voltage of the generator 6 directly and through the inverter 9 is fed to the inputs of keys 12 and 13. Since, when drawing circles and their arcs, the And 10 all the time remains closed, and the trigger 11 is in the single state, then the input 12 of the element OR 15 through the key 12 passes the non-inverted voltage of the generator 6, which is then no longer connected to the phase shifter 14 and to the imaging unit 16. According to the signal from the decoder 7, the phase shifter 14 shifts the sinusoidal voltage applied to its input by 90 degrees, and the backlight unit 8, in accordance with the code received from the backlight register 5, generates a control signal for the illumination of the drawn circle (or its arc).

The sinusoidal voltage shifted from the phase from the output of the phase shifter 14 and the control signal from the output of the node 8 of the light comes to the inputs of the formation block 16 shown. In block 16, in accordance with other characteristics of the circumscribed circle (arc), the deflecting voltages and the backlight pulse are generated from the two sinusoidal voltages and the light control signal displaced in phase to each other, which are fed to the control inputs of the cathode ray tube 17.

Circles (arcs) are drawn for two periods of sinusoidal waveforms. At the same time, the beginning of the indirectly drawn circle (arc) is strictly initiated at the beginning of the second period of the sinusoid, its first period is assigned to compensate for the transient process that occurs in the deflection of the electron beam when it is output to the starting point of the screen.

In the case of direct drawing of straight line segments in the proposed device, only / 4 of the sinusoidal waveform is used. In order to ensure that the synchronous operation of the device is not disturbed (i.e., the beginning of the direct drawing of any type of line, it would always be strictly directed to the beginning of the second non-zero sinusoid), the device every time wearing a drawn straight line segment is guided and inverted sinusoidal voltage phase shifter 14 and block 16 of the formation depicted. This is achieved by the fact that when registering and registering the 4 line codes of the corresponding direct signal from the output of the decoder 7, it sends not only to the phase shifter 14 and the node 8 of the light, but n 5 to the element PI 10, preparing it to operate. On this signal, the node of the light module, the latter, at the moment of the beginning of the direct drawing, develops a pulse, but a duration equal to / 4 of the sinusoid generator generator 6, and, secondly, at the moment of termination of this emulsion, the signal passes through element 10 to the counting trigger input and switches . This leads to n1-c1H1-susceptibility at the inputs of the phase shifter 14 n.

5 block 16 forming images. Therefore, the formation of a new graphic element starts immediately after the end of the previous one is drawn without disturbing the princedom synchronism of the device operation.

0 The proposed device, but comparing with the prototype, allows to reduce the time for the formation of the image displayed on the screen of the cathode ray tube by 20%.

Formula and 3 about b and e and

A device for displaying information, comprising a generator associated with the inverter, as well as serially connected real-time register n switch, connected respectively to the imaging unit associated with the cathode-ray tube, through the line code register - to

to the decoder connected to the illuminator block by the phase shifter connected to the block, which is formed, via the illumination register, to the illumination block associated with the imaging unit, which is because, in order to increase the speed of the device, elements of , two keys, a trigger, an OR element, associated with a key, a phase shifter, a imaging unit, and

a trigger connected via an element I to a decoder and a light unit, one of the keys being connected directly to the generator, and the other through an inverter.

Sources of information, which are given to the attention of the nrn externs:

1.Vonros radio electronics. Cern EVT, 1974, no. 2, s. 165-178.

2. Avt. St. No. 229028, cl. G 06 K, 15/20, 1969.