SU758133A1 - Information display - Google Patents

Description

The invention relates to the field of automation and computing and can be used in computer output devices and information display systems.

A device for displaying information on a screen of a cathode-ray tube (CRT) is known, which contains a software sensor, a symbol selection unit, a memorization and formation unit, an inverter, AND elements, an input register, a paraph. Key amplifiers, a binary counter for the number of points, a memory circuit. the coordinates of the points on the voltage dividers, the diode keys of the choice of characters, the waiting pulse generator £ ί].

A disadvantage of this device is the presence of memory, made ¹ either by a circuit or by software and a rather complicated hardware implementation.

A device for displaying information on a CRT screen is known, which contains an input register, a pulse distributor, voltage drivers, a counter, a decoder, an AND block, adders, NOT delay elements, a clock generator *

2

frequency, CRT with deflection coils and a modulator [2].

The disadvantage of this device "is the low speed and low reliability of it.

The aim of the invention is to increase the speed and reliability of the device.

For this, a device for displaying information on a CRT screen containing a pulse generator, a receiving register, AND elements, voltage drivers, whose inputs are connected to a CRT deflection system, a backlight unit whose output is connected to a CRT modulator, a micropigram distributor, switches, triggers, a prohibition element, the output of the pulse generator is connected to the first input of the first element I, the prohibition element and the distributor of micropigrams, the second input of which is connected to the output of the receiving register and the first to ode illumination unit and mikropoligramm distributor output connected to the first input switch and the second input of the illumination unit, an output of the first AND element is connected to the third input of the distributor mikropoligramm, SW3

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four

the first and second triggers, and the second input of the second trigger is connected to the output of the inhibit element, the first output of the first trigger is connected to the first inputs of the second element, And the second output of the first trigger is connected to the first inputs of the third and fourth elements, the first and second outputs The second trigger is connected to the second input of the third element I, and the second output of the second trigger is connected to the second input of the first trigger and the second input of the fourth element I, the output of which is connected to the second input of the prohibition element, torym input of the first AND gate and the third input of the illumination unit and fourth input switch as well. the fourth and fifth inputs of the backlight unit are respectively connected to the outputs of the second and third elements And the second and third inputs of the switch, and the first and second outputs of the switch are connected to the first and second inputs of the first driver, and the third and fourth outputs of the second switch are connected to the first and second inputs second shaper.

The drawing shows a structural electrical circuit of the proposed device.

• B. Composition of the device for displaying information includes a pulse generator 1, triggers 2 and 3, elements 4-7, prohibition element 8, micropigram distributor 9, switch 10, voltage drivers 11 and 12, backlight unit 13, receiving register 14, electron beam tube 15 with deflecting coils 16 and 17, the input bus 18 and the output bus 19.

Triggers 2 and 3 with counting inputs, elements AND 4-7, prohibition element 8 serve to generate three control pulses of duration ΐ ₀ each, as well as to highlight the accounting pulses of the request for the formation of a regular micropigram, which from the output of the And 7 element arrive at the input micropigram distributor.

The switch 10 connects the output elements And 4-6 to the input of the formers 11 and 12 in such a way that, depending on the control signal from the output of the distributor 'micropoly 9, the formers of the deflecting voltages 11 and 12 produce the voltages necessary for the formation of that and only that micropigram that corresponds to the signal from the outputs of the micropigram distributor 9. Moreover, the micropigram 9 dispenser produces out of eight possible signals only those corresponding micropigrams that are necessary to form icon will be displayed.

The device works as follows.

The pulse start display on the input bus 18 starts the generator 1, which begins to produce a periodic sequence of pulses of frequency ί, which through the element of the ban enters the counting input of the trigger 2. Unit output of the trigger

2 is connected to the counting input of the trigger 3. The inputs of the elements 4-6 are connected to the outputs of the flip-flops 2 and 3 in such a way that the first pulse from the generator 1, having set the trigger 2 to one state, forms the output ^ of the element 4 and 4. the duration of which is determined by the moment of arrival at the counting input of the trigger 2 of the next pulse from the output of the generator 1. Thus, the pulses from the output of the generator 1, acting on the counting input of the trigger 2 through the prohibition element 8 and changing the state of the triggers 2 and 3, are formed at the output of the And 4 elements -6 pulses long awnom ι ₀ . Every third pulse of the generator 1 is allocated element

And 7, the first input of which is connected to the output of the generator 1, and the second input is connected to the output of the element AND 6. The pulse from the output of the element AND 7 sets the trigger 2 to one state and the trigger to the zero state

3 is the impulse of taking into account the request for the formation of micropigrams.

Simultaneously with the pulses from the outputs of the And 4-6 elements, the switch 10 and the illumination unit 13 receive one of the potentials from the outputs of the micropigram distributor 9. The potential ensures the connection of the outputs of the And 4-6 elements using the switch 10 to the driver inputs so that on the CRT screen 15, a three-element figure (micropigram) is formed. It rigidly corresponds to a trigger, from the output of which a potential arrives at the switch input.

The first pulse from the output of the element And 7- sets to zero the first of the triggers of the distributor of micropigrams 9, which are in the single state, and prepares the circuit for setting to the zero state by following the pulse from the output of the element And 7 to the next "single" trigger, etc.

On distributor 9 mikrrpoligramm removed outputs pulses 3ί ₀ ensure consistent formation only necessary for the display character mikropoligramm.

Simultaneously with the formation of a micropigram, the switching pulses (Зёр)

together with the code of the displayed symbol and pulses of duration

five

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ΐ _ο from the outputs of the And 4 ~ 6 elements arrive at the corresponding inputs of the illumination circuit 13 in such a way that the elements of the micro polygram that are needed to display the symbol are highlighted. five

After the last required micro-polygram is formed, the micro-polygram 9 distributor generates a pulse of the end of the display, which is removed from the bus 19 and prepares the device for displaying a new symbol on a new familiarity.

Thus, on the screen of a CRT 15, a symbol is formed and displayed in the time required for the formation of only those micropigrams, which include the elements from which the displayed symbol is synthesized.

In the proposed device, the reliability is significantly increased, firstly, due to the fact that one element of the polygrams has a possible effect (Only two successive elements that make up a micro-polygram, and secondly, due to a small amount, for the formation of a single micro-polygram, which is consistently used for the formation of the required micro-polygrams.

The proposed device provides a significant time gain. So for the formation of the characters of the Russian alphabet on one familiarity, the gain compared with the prototype was 2.33 times, and for the numbers 35

2.45 times

The comparison was carried out according to the formula

ъ =

where w

the number of elements for the formation of polygrams in a known device;

the number of micropigrams required to form the contours of a symbol; the likelihood of a symbol;

the number of characters in the alphabet.

40

45

50

Claims (1)

Claim A device for displaying information on the screen of a cathode-ray tube containing a pulse generator, a receiving register, AND elements, voltage drivers, whose inputs are connected to a deflecting system of a CRT, a backlight unit, the output of which is connected to a CRT modulator, characterized in that in order to improve the speed and reliability of the device, a micropigram distributor, a switch, triggers, a prohibition element are entered into it, the output of the pulse generator is connected to the first input of the first And element, the prohibition elements and micropigram distributor, the second input of which is connected to the output of the emitter register and the first input of the backlight unit, and the output of the micropigram distributor is connected to the first input of the switch and the second input of the backlight unit; flip-flops, and the second input of the second trigger is connected to the output of the inhibit element, the first output of the first trigger is connected to the first outputs of the second element, And the second output of the first trigger is connected n to the first inputs of the third and fourth elements And, the first and second outputs of the second trigger, respectively, are connected to the second inputs of the third and fourth elements And, the first output of the second trigger is connected to the second input of the third element, And the second output of the second trigger is connected and the second input of the fourth element And, the output of which is connected to the second input of the prohibition element, the second input of the first element and the third input of the backlight unit and the fourth input of the switch. torus, and the fourth and fifth inputs of the backlight unit, respectively, are connected The outputs of the second and third elements And the second and third inputs of the switch, the first and second outputs of the switch are connected to the first and second inputs of the first driver, and the third and fourth outputs of the switch are connected to the first and second inputs of the second driver.