SU748463A1 - Device for displaying information on crt screen - Google Patents

Description

The invention relates to the field of automation and computer technology 1J can be used in information display systems. A device is known for displaying information on a screen of a cathode ray tube, containing coincidence circuits, an assembly, a microvactor dispenser, a deflection voltage driver, a cathode ray tube, an element delay and trigger 11. The disadvantage of the device is the narrow scope of its application. The closest technical solution to the present invention is with a device for displaying information on the screen of a cathode ray tube, comprising a register, a trigger, a distributor of mycrotacts, AND, OR elements, a delay element, a driver of deflecting functions, an inverter, a Ban element, an electron beam, 12J . The disadvantage of such a device is the narrow scope of its use, which means that the alphabet of the display of device characters is quite limited. . The aim of the invention is to expand the scope by increasing the alphabet of displayed symbols. The goal is achieved by the fact that a device containing a pulse generator, the input of which is the control input of the device, and the output is connected to the input of the pulse distributor, the first input of the And element and the first input of the receiving register, the second input which is the information input of the device , and the output of the receiving register is connected to the control of the electrode of the cathode ray tube, the deflecting voltage former, the first input of which is connected to the first output of the pulse distributor, the second output It is connected to the second input of the AND element, the inverter and the first OR element, contains two OR elements, three keys, a counter, an adder and an additional deflection voltage driver, the first and second inputs of which are connected respectively to the third output of the pulse distributor and to the output of the second element OR, the first input of which is connected

to the second input of the element I and to the first input of the first element OR, and the second input of the second element OR is connected to the fourth output of the pulse distributor, the fifth output of which is connected to the second input of the first element OR, the output of which is connected to the second input of the deflector voltage The output of which is connected to the first input of the adder, the second input of which is connected to the output of the first key, the first input of which is the information input of the device, and the second input is connected to the first output of the counter, the input of which It is connected to the output of the element I, the second output of the counter is connected to the first input of the second key, the second input of which is connected to the output of the additional deflecting voltage forwarder and to the input of the inverter whose output is connected to the first input of the third key, the second input of which is connected to the first output from Yotchyka, and the output of the third key is connected to the first input of the third element OR, the second input of which is connected to the output of the second key, the output of the third element OR and the output of the adder are connected to the diverting system noluchevoy tube ,. ; The third output of the counter is the control output of the device.

FIG. 1 is a block diagram.

bind device; see 2 - formed polygram and non-graphs. bypassing deflection functions:

The device contains a pulse generator 1, the pulse distributor

P2, deflection voltage generator 3, additional deflection voltage generator 4, with-:. Removable register 5, first and second elements ORIB, 7, element AND, 8, inverter 9, first, second and third keys. 1Q, 11 ,. 12, an adder 13, a counter 14, a third element OR 15, a bus 16, an electron beam tube 17, tires 18, 19, 20.

The device works as follows.

Signal Start on the bus 20

The pulse generator .1 begins to propagate the periodic pulse pattern. The polygram is formed in four cycles of operation of the pulse distributor 2. During the first five cycles of operation of the pulse distributor 2 (i.e., the first cycle), the deviations of the first and second formers 3 and 4 are formed by the deviation of y. .

The stresses shown in FIG. 2a, which arrive unchanged on: the deviation systems, respectively, on the X and Y coordinates of the CRT 17, since the keys for the first and second cycles of the micro-tact distributor work 10

and 12 are closed, and key 11 is open. On

CRT screen 17 elements are formed

polygrams from the first to the fifth (Fig. 26). The first impulse in the second cycle of the circuit operation will change the state from laptop 14 to 1.

The order of formation of the elements of the polygram is chosen such that dp of formation of the elements of the sixth to the tenth polyamide requires analogous deflection functions, as for the formation of the elements from the first to the fifth.

So, in two cycles of the scheme, the first part of the polygram is formed of ten elements.

The first pulse in the third cycle changes the state of the counter 14 by another. This corresponds to such a state of the scheme that the keys 10 and 12. are open, and the key 11 is closed.

In this state of the circuit, the deflecting function X (t) is fed to the deviation system along the X coordinate through the adder 13, to the second input of which, through the public key 10, the negative bias is applied - LH. The magnitude of this displacement is chosen such that the beam is transferred to the beginning of the formation of the eleventh element (Fig. 26). Since key II is closed and key 12 is open, an inverted deviation of the function Y (t) from the output of the former 4 through the inverter 9 will flow to the deflection system along the coordinate Y of the CRT 17 (Fig. 2c).

The operation of the device in the third and fourth cycle is similar to the operation of the device in the first, cycles. The deflection functions for forming the 11.-15 and 16-20 elements are similar.

The first pulse from the pulse generator 1, which came after the end of the fourth cycle of the circuit, is the pulse of the end of the symbol, which, on bus 19, prepares the device for generating a new symbol in a new familiarity.

Simultaneously with the formation of the elements of the polygrams, the modulator CRT 17c of the output of the receiving register 5 receives the code of the displayed symbol synchronized by the pulses from the output of the pulse generator 1. In accordance with this code, only those elements of the polygrams are selected that form the outline of the displayed symbol. .

So, for twenty micro-tacts on a CRT crane 17, a generalized igura polygram is formed, which allows to reflect the entire diffracted alphabetic alphabet, g target designations and oriented vectors.

Without compromising the reliability of the prototype, has an exceptional growth of technical implementation, the offered device has a more wide range of applications than the prototype.

Claims (1)

1. Authors certificate of the USSR 0 No. 463125, class G 06 K 15/20, 1973.. 2, Copyright certificate for application number 2174210 / 18-24, cl. G U6 K 15/20, 1975. T /%./ but) S) ; 2 3 t