SU798794A1 - Device for displaying information on crt screen - Google Patents

Description

The invention relates to the field of computer technology and can be used in computer output devices and automated control systems in the generation and selection of alphanumeric information. A device for displaying no alphanumeric information, containing a receiving register, a pulse distributor, a decoder, AND, OR elements, voltage drivers ll, is known. The disadvantage of this device is limited functionality, as well as lack of reliability in operation, which leads to a deterioration in the quality of the formation and display of information. The closest in technical solution is a device for displaying information on a CRT screen, containing a receiving register, a trigger, a driver deflecting to voltage, associated with deflection systems of a CRT, a distributor of micro tantas, a pulse generator, a counter, delay elements, a block logical elements, elements AND 2. The disadvantage of this device is the low speed and large code size, determined by the number of elements that make up a generalized figure. The aim of the invention is to increase the speed and reliability of the device. The goal is achieved by the fact that a second receiving register and two groups of I elements are entered into the device, while the output of the pulse generator is connected with the first inputs of the first and second elements I, with another input of the first register, the input of the micro-clock distributor, whose outputs are connected to the first a group of inputs of a block of logic elements, one of which is connected to the second inputs of the first and second elements And, the output of the second element And is connected to another input of the trigger, the outputs of which are connected to one of the inputs of the elements And respectively Leica Geosystems groups. the second inputs of which are connected to the outputs of the decoder, and the outputs - to the second group of inputs of the block of logic elements, the outputs of which are connected to the inputs of the corresponding deflecting voltage drivers, one output ;; the trigger is connected to the third input of the first element AND, the output of which is connected to the output bus, the input of the second register is connected to the second input bus, and the output is connected to the input of the decoder, and also the block of logical elements contains two groups of elements OR, the third group of AND elements and the OR element, and the first group of input busbars of the block directly and through the OR element is connected to the input. I will give the corresponding AND elements of the third group, the second inputs of which are connected to the outputs of the corresponding OR elements of the first group, and the outputs through the corresponding OR elements of the second group with the corresponding output buses, the second group of input buses of the unit is connected with the inputs of the corresponding OR elements of the first group. Figure 1 shows the functional diagram of the device; Fig.2 is a block diagram of logical elements; in Fig. 3, a set of private polygrams; in Fig. 4, a table of correspondences of the outputs of the decoder to a code of the private polygam fiiI at its inputs; FIG. 3 shows timing diagrams of deviating stresses. The device contains a pulse generator 1, a micro-tact distributor 2, a block of logic elements 3, a decoder 4, registers 5 and 6, trigger 1, groups of elements 8 and 9 elements and 10 and 11, an electron-beam tube 12 with deflecting systems 13, 14 and a module the driver 15, the deflecting voltage formers 16 and 17, the first input bus 18, the second input bus (Symbol code) 19 and the output bus {End of display) 20. The formation of symbols is carried out from the particular polygram defined for each symbol (Fig. 3) each of which in turn is formed from pairs five element, trapezoidal closed figures mikropoligramm. In total, there are eight such micropigrams / Fig. five). A set of micropolygrams and private polygrams formed from them provides the possibility of forming and displaying the entire diffro-alphabetic alphabet. Since there are only 10 elements in each particular polygram, then for storing the code for the illumination of a beam of a CRT, any symbol is sufficient 10 times digs. There are eight private programs, so three bits are enough to store a private polygram code. So, as a character, arriving by a parallel code on bus 19, is only 13 bits, while in a known device, the character code is 24 bits. The receive shift register 5 is used to store the ten-element highlight code, and the receive register b is used to store the three-element code of the private polygram. Each output of the decoder 4 is matched with a certain micropigram, so there are eight outputs. Moreover, to the excited states there can be only two exits, since each partial polygram is formed from two micropigrams. In order to prioritize the formation of the micropigram, the outputs of the decoder 4 are divided into two groups in which only one of the outputs can always be in an excited state (Fig. 4). The trigger 7 of the group of elements AND 8 and 9 ensures the sequence of signals from the output of the decoder to the inputs of the logic element block 3. And the element 10 ensures the change of the state of the trigger 7 after each cycle of the micro-tact distributor 2. The micro-tact distributor 2 functions in such a way that : When his work is in the excited state, only one of its outputs can be in series. Element 11 is used to form a signal. End of Display. The block of logic elements 3 serves so that, depending on the state of the outputs of the elements 8 and 9 of the distributor of micro-tacts 2, they are switched to the inputs of the corresponding drivers 16 and 17 so that the output voltages are removed from the output of the last micropigram which corresponds to the excited output of the decoder 4. The block of logical elements contains the element OR 21, the first group of elements OR 22-33, the group of elements AND 34t37 and the second group of elements OR 38. The numbers 39.1-39.5 designate There is a first group of inputs for the connection block with the outputs of the micro-tact distributor 2, numbers 40-1740-8, the second group of inputs, with inputs 40.1v40.4 connected to the outputs of the And 8 elements, and inputs 40.5f40.8 with the outputs of the And 9 elements, digits 41 -5-44 are the outputs of the block, with the outputs 41 and 43 being connected to the summing inputs of the drivers 16 and 17, and the outputs 42 and 44 to the subtractive inputs of the same drivers. The block of logic elements 3 functions in the following way. At the output of decipher 4, a code is formed that corresponds to the fifth private polygram (FIG. 4), i.e. in the excited state are the third and sixth outputs of the deshifter 4. If the trigger 7 is in the zero state, then in the excited state is

only the output of the third element is And 8. The sixth output of the decoder 4 will not be connected to the corresponding input of the block of logic elements, because the second inputs of the elements And 9 do not receive the resolving potential from the output of the trigger 7. The potential from the output of the third element And 8 via bus 40-3 to the first cycle of operation of the distributor of microstates 2 through the elements OR 23, and 35, OR 38 through the bus 42 enters the subtractive input of the imager 16, and through the elements OR 25, AND 37, OR 38 through the bus 44 - to the subtractive input of the imager 17. On the following timing ticks The rotates 2 of the potential-output of the third element AND 8 will be connected to the corresponding outputs 41-44 through certain elements AND, OR. For five cycles (FIG. 5), the deflection functions necessary for the formation of the third micropolygram (figure 5). The formation of the sixth micro-polygram begins after the cycle of operation of the micro-tact distributor 2, i.e. after trigger 7 changes state. Similarly, other private polygrams are formed.

The device operates as follows. On the symbol code bus 19, the thirteen-digit character code is written to registers 5 and 6 in such a way that the ten-element highlight code is stored in register 5, and the three-element private polygram code that is previa in register 5. decoded into an eight-element code. On bus 18, the Start signal is set to O flip-flop 7, which ensures that the potential passes from one of the excited outputs of the decoder 4 through one of the elements AND 8 to the input of the logic elements block 3. With the same signal, the Start starts the pulse generator 1, from the output of which Impulses go to the input of the micro-tact distributor 2. The block of logic elements 3 begins to function in accordance with the described algorithm, i.e. At each operation cycle of the distributor 2, the excited output of one of the elements 8 and 9 is connected only to certain inputs of the deflecting voltage drivers 16 and 17, the output of which is necessary for the generated micro-polygram voltage to arrive at the coordinate deviation systems 13 and 14, ELT 12 . The sixth pulse from the output of the pulse generator 1 through the element And 10 translates the trigger 7 into one state, i.e. a second micropigram begins to form, constituting a frequency polygram. At the same time

with the formation of deflecting SRI, the pulses from the output of the generator 2 are fed to the input of the shift register 5c so that the illumination code goes to the modulator 15, in accordance with which only those elements of the frequency polygram that constitute the contour, are displayed character. The eleventh pulse from the output of the generator 1

Q is the End of Image mapping pulse which, on bus 20, takes the beam to the starting point of a new familiarity and writes the code of a new character on bus 17 to registers 5 and 6. The device is ready to generate a new character on a new familiarity.

Since there are only two five-element micro-polygrams in each private polygram, the symbol formation time is 10 tj, where the formation time of a single polygram element and.

f

Claims (2)

Invention Formula 5 1. A device for displaying information on the screen of a cathode ray tube, comprising a pulse generator, a micro-tact distributor, a trigger, one input of which Q is connected to the input bus and to the input of the pulse generator; two forcing devices are deviating voltages associated with deviating CRT systems; a receiving register, one input of which f is connected to the second input bus, and the output is connected to the CRT modulator, the first and second elements AND, the block of logic elements and the decoder, so that, in order to increase speed and reliability 0 devices, the receiver has been entered into it. a register and two groups of AND elements, wherein the output of the pulse generator is associated with the first inputs of the first and second AND elements, with another input 5 of the first register, the input of the micro-clock distributor, the outputs of which are associated with the first group of inputs of the block of logic elements, one of which is connected to the second inputs Q of the first and second elements And, the output of the second element And connected with another input of the trigger, the outputs of which are associated with one of the inputs of the element And the corresponding groups, the second inputs of which are connected to the outputs of the decoder, and the outputs to the second group of inputs of the block of logic elements , the outputs of which are connected to the inputs of the corresponding deflection voltage drivers, one output of the trigger is connected to the third input of the first element I, the output of which is connected to the output bus, the input of the second register is connected to the second input bus, and exit - with the entrance decoder. 2. The device according to claim 1, characterized in that the block of logical elements contains two groups of elements OR, a third group of elements AND, an element OR, and the first group of input buses of the block directly and through the element OR connected to the inputs of the corresponding elements. And the third group, the second inputs of which are connected to the outputs of the corresponding OR elements of the first group, and the outputs through the corresponding OR elements of the second group with the corresponding output buses, the second group of input busbars of the unit is connected to the inputs of the corresponding OR elements of the first group. Sources of information taken into account in the examination 1. USSR author's certificate number 463125, cl. G 06 K 15/20, 1975. 2. USSR author's certificate according to the application No. 2543528/24, Cl, G 06 K 15/20, 1977. Sh 7 sh