SU1137505A1 - Device for forming symbols on crt screen - Google Patents

Abstract

1. DEVICE FOR THE FORMATION OF SYMBOLS ON THE SCREEN OF ELECTRON-BEAM TUBE, containing a pulse generator, the input of which is the first input of the device, and the output is connected to the first input of the pulse distributor, the outputs of which are connected to: the inputs of the first group of the deflection voltage generation unit, the first and the The second outputs of which are the first and second outputs of the device, the third output of which is the first output of the backlight unit, the first register, the first output of which is connected to the first exit of the mic selection unit An oligram, the first output of which is the fourth output of the device, the group of elements AND, characterized in that, in order to increase the accuracy of character formation by increasing the number of elements of the generalized figure, in it the output of the pulse generator is connected to the input of the backlight unit, the second output of which is connected to the first inputs of the AND elements of the group, except for the first one, the first input of the first register, the second inputs of the micropigram selector unit and the pulse distributor, and the first input of the deflection voltage generation unit, the inputs of the second group of which are connected to the outputs of the group of the micropigram selection unit, the third output of the illumination unit is connected to the first output of the first element AND of the group and the second input of the first register, the outputs of which group connects (to the second inputs of the elements AND group, the third input of the first register is the second the device input, the outputs of the elements AND groups are connected to the inputs of the group of the backlight unit. 2. A device according to claim 1, characterized in that the illumination unit comprises the first and second OR elements, the second register, the AND-NOT element, the first and second inverters, and the first, second and third AND elements, the first input of the second register is the input of the block , one of the outputs of the first I output of the block, the output of the AND element is NOT connected to the first input of the first AND element and is the second 09 output of the block, the third output of the second is the output of the second elec amp amp 1, the second and third elements And connected to the O1 output of the first inverter, each th input of the third element And is connected to the output of the second inverter, the output of the third element And is connected to the second btM input of the first element AND, the output of which is connected to the first input of the first element OR, the output of which is connected to the second input of the second register, the third input of which is connected to the output of the second element OR, the other outputs of the second register are connected to the inputs of the NAND element, the input of the second element OR are connected

Description

Yen with the input of the first inverter, which is the first input of the group of inputs of the block, the fourth input of the second register is connected to the second inputs of the first and second elements OR, and is the second input of the group of inputs of the block, the fifth input of the second register 37505

The second input is connected to the input of the second inverter and another input of the second element AND, which is the third input of the group, the input of the block, the inputs of the second register group are the fourth input of the input group of the block.

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

A device for displaying information that implements a micropigram method of forming symbols on a CRT screen, contains a pulse generator, a frequency divider, a counter, a shift register, a deflection voltage driver, OR, AND keys, a CRT, and a receive register 1.

However, this device is characterized by a lack of accuracy in the formation of symbols, as well as low speed of operation.

Closest to the proposed technical entity is a device for displaying symbols on a CRT screen, comprising a pulse generator, a distributor, a deflection voltage generation unit, a group of elements AND, a microgram selection unit, a register, a backlight unit, a register, and And 2j.

However, the device is characterized by insufficient accuracy of the display of symbols due to the small number of elements of the generalized familiarity figure and, as a result, the insufficient quality of the display of symbols.

The purpose of the invention is to improve the accuracy of the formation of symbols by increasing the number of elements of the generalized figure.

The delivered target is achieved by the fact that in a device for forming symbols on a screen of a cathode ray tube (CRT), comprising a pulse generator, the input of which is the first input of the device, and

the output is connected to the first input of the pulse distributor, the outputs of which are connected to the inputs of the first group of the deflection unit, the first and second outputs of which are the first and second outputs of the device, the third output of which is the first output of the backlight unit, the first register, the first output which is connected to the first input of the micropigram selector unit, the first output of which is the fourth output of the device, a group of elements And, the output of the pulse generator is connected to the input of the backlight unit, the second one of which is connected to the first inputs of the AND elements of the group, except the first, the first input of the first register, the second inputs of the micro-polygram selection and pulse distributor, and the first input of the deflection voltage generation unit, the inputs of the second group of which are connected to the outputs of the microprogram selection block, the third output the backlight unit is connected with the first code of the first element AND of the group and the second input of the first register whose outputs are connected to the second inputs of the elements AND group, the third input of the first register in The second input of the device, the outputs of the AND elements of the group are connected to the inputs of the group of the backlight unit. The illumination unit contains the first and second SHS elements, the second register, the NAND element, the first and second inverters and the first, second and third AND elements, the first input of the second register is the input of the block, one of its outputs is the first output of the block, the output of the element The IS is NOT connected to the first input of the first element AND, and is the second output of the block, the third output of which is the output of the second element AND, one of the inputs of the second and third elements AND is connected to the output of the first inverter, another input of the third element AND is connected to the output of the secondthe inverter, the output of the third element And is connected cio by the second input of the first element AND whose input is connected to the first input of the first element OR whose output is connected to the second input of the second register, the third input of which is connected to the output of the second element OR, the other outputs of the second register are connected to the inputs of the elements That AND-NOT, the first input of the second element OR is connected to the input of the first inverter, which is the first input of the group of inputs of the block, the fourth input of the second register is connected to the second inputs of the first and second elements ntov and OR is a group of the second input unit inputs the second input of the fifth register is connected to the input of the second inverter and the other input of the second AND gate, which is the third input group unit inputs, inputs of the second register group are groups fourth input unit inputs. FIG. I shows the fuction device; in fig. 2 is a functional diagram of the illumination unit in FIG. 3 is a view of micropigramms, diagrams of deflecting stresses; in fig. 4 - generalized figure dating; in fig. 5 - types of different deflection voltages and types of illumination codes and the algorithm for decoding the symbol code into: illumination codes. The device comprises a pulse generator 1, a pulse distributor 2: a owl, a deflection voltage generation unit 3, a group of elements 4 I, a micro 5 selection block 5, a first register 6, a backlight unit 7, input buses; Start 8, Symbol code 9, output voltages: deviation voltages in x (t) 10 and y (t) 11, illumination voltages z (t) 12, End of symbol 13 Illumination unit 7 contains elements 14-16 AND, elements 17 and 18 OR, Element 19 AND-NOT, second register 20, inverters 21 to 22, the proposed device implements the method of micro-polygram synthesis of images. Synthesis of symbols is complete: eight micropigram j Gene. FIG. 3), the totality of which forms a generalized familiarity figure, shown in FIG. 4. The obbenna figure consists of 26 elements. To form all eight micropoly-, grams is sufficient in various combinations (taking into account the polarity change of four types of deflection voltage. Moreover, the deflection voltage in the X coordinate is the same in shape for all micropigrams and is formed from two voltages: B and B. This eliminates the need for two types of deflection voltage formers with different amplitude rise times.All micropigrams are five-element, i.e., the illumination code consists of five bits. There are six types of illumination code, whereby the ONs are divided into two identical groups, which are distinguished by the presence or absence of units on the fourth and fourth bits (see Fig. A). Fig. 4 also shows the algorithm for decoding the illumination code. 10X combinations are analyzed in addition to the fourth digit. The micro-polygram illumination code stored in the memory consists of either three or four bits. The first five bits in the character code are assigned to indicate the micro-polygram numbers that need to be generated. o character. As a result, the code of any character does not exceed 31 binary bits. The generator G of pulses is designed to develop the tact: of pulses, which synchronize the operation of the entire device. The pulse distributor 2 is intended for the formation of code sequences, which are fed to the inputs of deflection voltage drivers. At present, only one of the outputs of the distributor 2 can be in the excited state. The second input of the distributor 2 is needed for resetting it to its original state. The first input of the distributor 2 to transfer from one state (excited; output i) to another (output excited i + l). Block 3 is designed to form deflectors such as yellow x (t) and (t). Distribute 2 signals to the first group of its inputs, and distribute 2 signals from the second group - from the microprogram selection block 5. The first input of the block 3. Enters the signal of the end of the micropigram generator to set the voltage formers to their initial state (zero voltage level at the output) in a time less than the pulse following period from the generator 1. At the first output of the block 3, a voltage x ( t), on the second - y (t). The group of elements 4 I is designed to pass the signals of three or four high-order bits of the first register 6 to the illumination unit 7, depending on the presence of signals on the second or second and third outputs. Block 5 is designed to convert five-bit code from the first register 6 (first five bits of register b) to eight-bit-1 (according to the number of micro-polygrams generated by the device) and to sequentially output the signals of the necessary micro-polygrams when forming a symbol. The second input of the block 5. receives signals of the end of the formation of micro-polygrams from block 7, which are the request signals of the following micropigrams. The signals of the required micropigram come from the group of outputs of block 5 to the second group of inputs of block 3. At the output of block 3, a signal ends the symbol; which goes to the fourth output of the device. The triggers in block 5 serve to memorize the numbers of micropigrams needed (their number is eight). Register 6 is intended to store the character code. In the first five bits (from left to right) the code of the required micropigrams is stored. The rest of register 6 stores the codes for the illumination of those micropigrams, which are indicated in the first five bits. The illumination code can be either four- or three-bit. The illumination codes of the required micropigram are located from the right to the left. The register size 6 is 3 (by the largest word of the character}. Register 6 represents essentially two registers. The first register (-5 bits is the ordinary storage register, the second (6-31 bits) shift register, and the signal arriving at its first input shifts the contents of 6-31 bits of register 6 by 3 bits to the right, and the cHrHajr arriving at the second input is shifted by one bit to the right. Both inputs are delayed: the first input is the time required for reliable reading of the contents of register 6 through the group of elements 4 AND, and the second input for reliable reading of the additional register bit 6, Block 7 is designed to form the illumination voltage z (t), as well as to issue a signal of the end of the micropigram formation and signals that ensure the rewriting of the illumination code of the next micropigram from register 6 to block 7. At the first input of block 7 a series of pulses comes from the generator. Register 20 is needed to store the five bits of the backlight code of the next micro-polygram, which is formed from a three- or four-bit code recorded in the register 6. To form three -or four-bit code of the five-digit illumination code are elements 15 and 16 AND, elements 17 and 18 OR and inverters 21 and 22. Elements 14 AND, inverter 22 are intended to determine if even an analysis is needed. of the correct bit from register 6. Element 19 IS-NOT generates a signal of the end of the formation of micropigrams, which occurs when register 20 is zeroed during the shift of the code of the illumination by pulses from generator I (register 20 is six digits dnsh). Initially, the illumination code is recorded in the left five bits of the register 20. The presence of the sixth bit is due to the necessity of coordinating the operation of block 3 and block 7. The device operates as follows. In register 6, the character code is written. Since the register 20 of block 7 is in the zero state, then at the output of element 19 I-PE there is a signal that first allows the contents of 29-31 bits of register 6 to pass through the group of elements 4 I. Thus, 3 register 20 is entered into the illumination code first necessary micro-polygram. In addition, the signal from the N-19 element, after reading the contents of 29-31 bits of register 6, shifts the contents of 6-31 bits of register 6 by three bits to the right, which leads to a shift of the illumination code of the second required micro polygram to bits 29- 31 of register 6, the described operations are performed if the microcode backlight code stored in register 6 is three-bit, but as mentioned, the light-code may be four-bit. If such a situation arises, then in this case, a signal is generated from block 7 by light, which paspieraaeT passes the contents of bit 28 of register 6 and after some time shifts the contents of 631 by one bit to the right. In this case, it will turn out that the illumination code will also be in the extreme right three or four bits, and this is the illumination code of the second required micro-program. The code of the required micro-polygram (1-5 register bits 6) is fed to the first input of block 5, in which this code is converted into eight -:: bit dB1. The output of block 5 generates the signal of the number of the first micropigram required for a given character, which The group of inputs of the block 3 enters the second. When the signal is received, the start (bus 8) starts the generator 1. The pulses from the output of the generator 1 arrive at the first inputs of the distribution l 2 and block 7. As a result, the outputs of the distributor 2 form a sequence of pulses a first group of input unit 3, the outputs of which forming a biasing voltage on nagf X and controlling kitsie electron beam for its movement along the trajectory of the first mikropoligrammy necessary. The pulses from the generator 1 are fed to the input Shift register 20 of block 7 and connect its output to the CRT modulator fHe (shown). The result is a flashing of those elements of the first required micro polygram that are included in the contour of the displayed symbol. As the light code is pushed out of register 20, a situation arises when all its bits will be in the zero state. In this case, at the output of element 19 AND-NOT, a signal is generated which reads the contents of register bits 6, i.e. the code for highlighting the second required micropolygram). If you read the IOX code while doing this, an additional signal is formed at the output of element 14 I, reading the contents of bit 28 of register 6. The signal from the output of element 19 AND-NOT shifts the contents of 6-31 bits (moving the highlight code of the third required micro polygram to the right the upper bits of the register 6y, as well as the installation of the distributor 2 and the voltage drivers in block 3, return to the initial state and, finally, arrive in block 5 to select the signal of the second necessary micro-polygram. valve 2 and block 7 begin forming the second required micropigram, as a result of which the CRT screen displays the elements included in the contour of the displayed symbol.This process is repeated until the next signal of the end of the micropigram formation 5, will not pass to the end of the end of the character. As a result, a character whose code is written in fe register is displayed on the CRT screen. The advantage of the proposed arrangement is to increase the accuracy of the displayed character by increasing the numbers elements of the generalized figures dating from 20 to 26 members. At the same time, the informational costs and speed of the device are the same as in the prototype.

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Claims (2)

1. A DEVICE FOR FORMING SYMBOLS ON THE ELECTRON BEAM TUBE SCREEN, containing a pulse generator, the input of which is the first input of the device, and the output is connected to the first input of the pulse distributor, the outputs of which are connected to: the inputs of the first group of the deflecting voltage generating unit, the first and second outputs of which are the first and second outputs of the device, the third output of which is the first output of the backlight unit, the first register, the first output of which is connected to the first output of the micropolymer selection unit Amm, the first output of which is the fourth output of the device, a group of AND elements, characterized in that, in order to increase the accuracy of symbol formation by increasing the number of elements of the generalized figure, the output of the pulse generator is connected to the input of the backlight unit, the second output of which is connected to the first the inputs of the elements AND groups, except the first, the first input of the first register, the second inputs of the micropolygram selection block and the pulse distributor and the first input of the deflecting voltage generating unit, the inputs of the second whose groups are under—. are connected to the group outputs of the micropigram selection block, the third output of the backlight unit is connected to the first output of the first AND element and the second input of the first register, the outputs of which are connected to the second inputs of the AND elements, the third input of the first register is the second device input, the outputs of the AND elements connected to the inputs of the group of the backlight unit. 2. The device pop. 1, characterized in that the backlight unit contains the first and second elements OR, the second register, the element AND — NOT, the first and second inverters and the first, second and third elements AND, the first input of the second register is the input of the block, one of its outputs— ( The first output of the block, the output of the element -> that AND is NOT connected to the first input of the first element And is the second output of the block, the third output of which is the output of the second element And, one of the inputs of the second and third elements And is connected to the output of the first inverter, another input third element And by is connected to the output of the second inverter, the output of the third AND element is connected to the second input of the first AND element, the output of which is connected to the first input of the first OR element, the output of which is connected to the second input of the second register, the third input of which is connected to the output of the second OR element, other outputs of the second the register are connected to the inputs of the AND-NOT element, per (В ^ 1-th input of the second element OR connected — pen with the input of the first inverter, which is the first input of the group of inputs of the block, the fourth input of the second register is connected to the second inputs and the first and second elements OR and is the second input of the group of inputs of the block, the fifth input of the second register is connected to the input of the second inverter and the other input of the second element And, which is the third input of the group the input of the block, the inputs of the group of the second register are the fourth input of the group of inputs of the block .