SU813499A1 - Device for displaying information on crt screen - Google Patents

Description

 ;

The invention relates to automation and computing technology and can be used to display information derived from a computer; A device is known to display information on a screen of a cathode ray tube (CRT) containing a register connected to the inputs of the device and a code-time converter, code-eg converters connected to the voltage controllers, the switch connected to the counter and the register Cl.

The disadvantage of this device is its complexity and low reliability.

The closest one to the invention is a device containing a first shift register, the output of which is connected to a CRT modulator, and moves to the first input of the device and the output of a controlled pulse generator connected to the input of a frequency divider and the first input of the second shift-register, the second the input of which is connected to the input of the controlled pulse generator and the second input of the device, the OR elements of the first group, the inputs of which are connected to the outputs of the AND elements

the first group, and the outputs - with the primary inputs of the AND elements of the second group, connected via the OR elements of the second group and the shapers of the deflecting voltages to the deflection system of the CRT, the first, second, third and fourth elements AND, the output of which is connected to the decoder device p.

The disadvantage of this device

0 is low reliability.

The purpose of the invention is to increase the reliability of the device.

The goal is achieved by the fact that the device containing

5 first shift is a real register, the output of which is connected to the modulator. CRT, and the inputs to the first input of the device and the output of the controlled pulse generator connected to the input

0 frequency divider and the first input of the second shift register register, the second input of which is connected to the input of the controlled pulse generator and the second input of the device, elements

5 OR of the first group, the inputs of which are connected to the outputs of elements AND of the first group, and the outputs with the first inputs of elements AND of the second group connected through the elements of OR of the second group and the deflecting voltage driver to the deviation of the CRT system, first, second., the third and fourths {elements, the output of which is connected to the output of the device, two triggers are entered, the counting input of the first trigger is connected to the output of the frequency divider AND the first (the INPUT of the first element And, the second input of which is connected to the first output of the first trigger, the output with a co-input input of the second trigger and the first input of the fourth element I, the first inputs of the elements. And the first group are connected to the outputs of the first trigger, and the second inputs to the first and second inputs of the second shift register and the outputs of the second and third elements I, whose inputs connected, respectively, with the first, third, fourth, and fifth outputs of the second shift register; the outputs of the second trigger are connected to the second input of the fourth And element and the second inputs of the And elements of the second group. FIG. 1 and FIG. 2, shows the device diagrams and the micro-polygrams formed using the O and 1 sequence. The device contains a controlled pulse generator 1, a frequency divider 2, the first shifting register 3, the second shifting switch 4, the first trigger 5, the second trigger 6, the elements AND 7.1-7.8 of the first group, the elements 8.1-8.8 of the second group, the second element 9 AND, the third element 10 And, the first element 11 And, the fourth element 12 And, the elements 13.1-13.4 OR of the first group, the elements 14.1-14.4 of the second group, the formers 15 and 1 of the bias voltage, the first input 17 and the output 18, the second input 19. The outputs of the formers 75 and 16 and the first shift register 3 are connected, respectively, with a deviation of system and modulator CRT. In this device, the symbols are formed from the elements of the trapezium of distant micropigrams, which are formed in a certain sequence. To form four trapezoidal micropigraphies, which provide data for almost all letters of the Russian and Latin alphabets, Arabic numerals, a series of symbols, for summing and subtracting 11Ц1е. the inputs of the formers 15 and 16 of the deflecting voltages along the X and Y coordinates (conventionally denoted f (x), f (x), f (yf), f (y), it is necessary to submit certain sequences. O and 1, shown in figure 2. Only four types of F 10000, Fj 00010, 10001, 01100 are needed for such sequences. It is for the formation of sequences 1, -F that register 4 is shifted and elements 9 and 10 are used. The unit inputs of the first and fifth bits of the register 4 are connected to the first input 17 of the device. The code circulating in register 4, from the first output of register 4, removes the sequence Fn, and from its second output - sequence F. Element 9 I, whose inputs are connected respectively to the first and third outputs of register 4, ensures the formation of the sequence FJ at its output, and element 10 I, whose inputs are connected respectively to the fourth and fifth outputs of register 4, sequentially sequence F. The process of forming the first, second, third, fourth micropigram (Fig. 2) differs only in that, when forming the first of them, the same specific sequences from F, -F arrive at the summing level of the corresponding formers 15 and 16, and during the formation of the second - to the subtractive inputs of the same formers and vice versa: the same sequences from F-F, received during the formation of the first and third micro-polygrams to the subtractive inputs of the formers 15 and 16, during the formation of the second and fourth micropigrams post packets for the summing inputs of the same shapers 15 and 16. For example, to form the first micropigram on the summing input of the fligligator 15, you must apply the sequence F, and to the subtracting input - the sequence F,, you must feed the sequence Fa, and to read the input - sequence 5 When forming the second micropigram, those sequences from F p4, which were fed to the summing inputs of the formers 15 and 16, must be submitted to the subtractive inputs of the same arrangers, and those sequences that were fed to the subtractive inputs, must be submitted to the summing inputs of the same drivers 15 and 16. In this case, the first MICROPOLYGRAM will be formed (figure 2). To form a second micropolygram, a sequence 1 must be sent to the summing input of the imaging unit 15, and to the subtracting input - 1u n the summing input of the imaging device U. 4 subtracting input - Fj. A couple of third and fourth micropolygms have similar properties. This kind of commutation of the sequences F - (within the indicated -polypolypram pairs are performed by the elements. AND, OR, and

trigger 5 with a counting input which is in the initial state, is in O. The sequence of formation of these pairs of microgroups l of the first, second, third and fourth is provided with the help of trigger 6 with the counting input, as well as elements And 14, Trigger b in the initial state also located in O.

The counting input of trigger 5 is directly connected to the output of divider 2 frequencies, so that its state changes every five device cycles, i.e. each time after the formation of the next micropolygramgla. The counting trigger input b is connected to the output of the 2 frequency divider through element 11 I, the other input of which is connected to the zero output of the trigger 5, so that the trigger 6 changes its state every ten device operation cycles, i.e. upon completion of the formation of a pair of symmetric micro-polygrams (first, second, third and fourth). In addition, the output of element 11 I is connected with one input of element 12 I, the other input of which is connected to the zero output of trigger b, so that after every twenty cycles of operation of the device, i.e. upon completion of the formation of all four micropigrams, from the output of element 12, the signal about the end of the display of the symbol was recorded.

The code of the displayed symbol at the second input 19 is written to the twenty-decimal shift register 3.

The device works as follows.

On the Start signal at input 17, register 4 is set to such. the state that code 10001 is formed at its single outputs. In this case, 1 corresponds to a high voltage level, and O corresponds to a low one. The Start signal starts the generator of 1 pulses, which begins to generate a periodic sequence of pulses of frequency H. . The first pulse received from generator 1 shifts the information in register 4 by one bit, which corresponds to code 11000 at the outputs of register 4. Since the first and third outputs of register 4 are connected to the corresponding inputs of element 9 AND, then. At its output, at the first cycle there will be a high voltage level. The next pulse from the output of generator 1 shifts one more bit in register 4, which corresponds to code 01100 at its corresponding outputs, etc. The state of register 4 on the second - fifth cycles corresponds to the fact that the output of element 9 will also have a low voltage level. Thus, at the output of element 9A, a type F sequence is formed in time.

Element 10, the inputs of which are connected to the fourth and fifth outputs of register 4, performs the function of isolating a high voltage level on every fourth of the five cycles of the device, i.e. at its output, the sequence Fj is formed. Directly from the first output of the -register 4, the sequence Fg is removed, and from its second output, the sequence (r.

; On the sixth cycle of operation of the device, register 4 is set to the state in which it was on the first cycle of operation of the device.

 In addition, this same pulse pulses the divider 5 into the opposite state via a divider 2 frequency. This corresponds to the beginning of the second cycle of the device.

On the first cycle of the device

0 triggers 5 and b are in the zero state. Therefore, the output of the element And 9 through the elements 7.3 And, 13.2 OR, 8.2 Neither 14.1 OR is connected; to sum the total input of the former .15,

5 which corresponds to the arrival of this sequence on the first cycle of the device operation of the sequence F,. To the subtracting input of the same shaper 15 through the elements 10 AND,

0 7.6 AND, 13.3 OR, 8.3 AND and 14.2 OR the sequence Fg arrives. For the summation of the input of the driver 16 from the first output of register 4 through the elements 7.2 and 13.1 OR 8.5 and

e And 14.3 OR comes the sequence of p2 (and on subtraction input from the second output of register 4 through the elements 7.3 AND, 13.4 OR, 8.8 AND and 14.4 OR OR - sequence F. Under the influence of sequences

0 F, –F, which are fed in this way to the inputs of the formers 15 and 16, the latter produce such voltage deviation such that during the first cycle of the device operation, i.e. behind

5 five cycles of his work, the first micrrhigram is formed.

In the second cycle of operation of the device, the trigger 5 goes into a single state. This corresponds to

Claims (2)

Q that the summing inputs of the formers 15 and 16 through the corresponding elements 7 AND, 8 AND and 13 OR, 14 OR receive the sequences Rj and. F ie the sequences that, on the first cycle, arrived at the subtracting inputs of the same formers 15 K 16. On the subtracting inputs of the formers 15 and 16 were received from the I sequence, which in the first cycle of operation of the device arrived at the summing inputs of the same drivers, i.e. sequences F and Pj. They act on the formers 15 and 16 in such a way that at their outputs x (1) and Y (1) they form a deflection to the voltage, necessary to form a second micropigram. The eleventh pulse from the output of the generator 1 through the divider 2 frequencies and the element I11 sets the trigger b to the one state, and the trigger 5 to the zero state. This corresponds to the start of the third cycle of the device. After another five cycles, i.e. the sixteenth pulse from the output of the generator 1, the trigger 5 is set to one state, which corresponds to the beginning of the fourth cycle of operation of the device. In the third cycle of operation of the device, the sequences F and Gd go through the corresponding elements 7 AND, 13 OR, 8 AND and 14 OR to the summing inputs of the formers 15 and 16, and the sequences P -and -F, to the inputs of the same formers. In the fourth cycle of operation of the device, those sequences (Pj and F) which in the third cycle arrived at the summing up of the inputs of the formers arrived at the subtraction of the inputs of the same formers and, conversely, those sequences that in the third cycle went to the subtractive inputs of the same form | a) worlds. This corresponds to the fact that at the outputs of the formers 15 and 16, voltage deviations are formed, which ensure the formation of the third and fourth microplicrams. Thus, on the screen of a CRT, four micro polychromes are spun in twenty clock cycles of operation of the FS device. At the same time, the twenty-element beam illumination code arrives at the CRT modulator about their formation under the action of pulses from the output of the generator 1 from the output of the shift register 3. In accordance with this code, only those micropigram elements that make up the contour of the displayed symbol are highlighted. The twenty-first impulse from the output of the generator 1 through the divider 2, elements 11 and 12 and enters the outgoing device 18 and prepares it to generate a new symbol on familiarity. The proposed device contains mainly discrete elements and possesses povshennoy. reliability due to the fact that the elements of the scheme,. used to form a single micro oligram ,. used to form other micropigrams. The invention device for displaying information on the screen of a cathode ray tube (CELT), containing the first shift and register 11, the output of which is connected to the CRT modulator, and the inputs to the first input of the device and the output of the controlled pulse generator connected to the input of the frequency divider and the first input of the second shifting the register, the second input of which is connected to the input of the controlled pulse generator and the second input of the device, the elements of OR of the first group, the inputs are connected to the outputs of the elements AND of the first. group, and you moves - with the first inputs of the elements AND the SECOND group connected through the elements OR of the second group of sensors and deflectors of the deflecting voltages and the deflecting system of the CRT, the first, second, third and fourth elements I., whose 5THEUT is connected to the output of the device, characterized by the fact that, in order to improve the reliability of the device, two triggers are inserted into it, the counting code of the first trigger is connected to the frequency divider and the first input of the first element I, the second input of which is connected to the first output of the first trigger the house of the second trigger AND the first input of the fourth element AND, the input elements AND the first are connected to the outputs of the first Trigger, and the second inputs to the first second output 1m of the second shift register and the outputs of the second AND third elements AND whose inputs are connected with the correct, third , the fourth and fifth outputs of the second shift register, the outputs of the second trigger are connected to the second input of the fourth And element and the second inputs of the And group elements. Sources of information taken into account in the examination 1. US patent number 3426344, CL. 340-324, pub. 1969. 2. USSR author's certificate for application No. 2690988/24, CL. Q About K 15/20 (prototype). T “, . li " L 7 / /and Sh