SU1136208A1 - Device for displaying graphic information on crt screen - Google Patents

Abstract

A device for displaying graphical information on a screen of a cathode ray tube (CRT), comprising a control unit otYuyuneniem beam and a video amplifier connected to the deflection yoke and CRT modulator accordingly, and code register .graficheskih symbols, characterized in that, in order to simplify the device and increase the accuracy of the display, it contains a series-connected controlled pulse generator, the first input and output of which are respectively the input and output of the device, the horizontal element generator graphic characters, shaper maximum horizontal elements of graphic characters, shaper additional horizontal elements of graphic characters, a block of elements And and an adder, the output of which is connected to the input of a video amplifier, and sequentially connected generator of vertical elements of graphic characters, whose input and inputs to the register of the code of graphic characters and block beam deflection control is connected to the first input of the controlled pulse generator, the driver of the maximum the vertical elements of graphic symbols and the shaper of additional vertical elements of graphic symbols, the second input of which is connected to the output of the generator of the vertical elements of graphic symbols connected to the second input of the block of elements And, the output of the generator of additional vertical elements of graphic symbols is connected to the third input of the block of elements And, a quarter and The five inputs of which are connected respectively to the output of the register of the code of the graphic code (the zhmvolov and the generator output are hortzooctal x graphic elements (zhmvolov, connected to the second inputs of the imager of content elements of graphic symbols and controlled pulse generator.

Description

The invention relates to automation and computer technology and can be used to display p) aphic information outputted from an information source (electric computer, operator console) on the screen of an electron beam tube.  A device for displaying information containing a cathode ray tube, two clock generators, a memory device, a reproducing control unit and providing reproduction of figures and characters on the screen of the electropulse tube in B1 is shown in a contour composed of elementary square image elements 1.  The disadvantage of this device is its low accuracy, since a limited number of elementary square image elements can be stored in the memory device.  The closest to the technical essence of the invention for displaying a mosaic pattern is a device containing a counting unit for repeating and reading the constructed signals coming from a horizontal selector to a matrix memory block, decoding blocks that S1 = 1 sequence of pulses of each line from the counting block, specifying generators of several types of pulses of different duration, which, on the basis of short reference pulses, form the required duration of the output pulses, And that pass signals when simultaneously outputting output pulses from decoding blocks and output signals from master pulse generators to an input, an OR element combining input signals from specified AND elements, and an AND element that passes a signal to an output while simultaneously supplying an input the output signal from the OR element and the read signal from the matrix memory block 2.  A disadvantage of the known device is also its low accuracy, since a limited number of display elements can be stored in the memory device.  The purpose of the invention is to simplify the device and increase the accuracy of the display.  This goal is achieved by the fact that a device for displaying graphic information on a screen of an electron-beam tube (CRT), containing a beam deflection control unit and a video amplifier, connected to the deflecting system and a CRT modulator, and a graphic code register 1 2 graphic symbols , a sequentially connected controlled pulse generator, the first input and output of which are the input and output of the device, the generator, horizontal elemental graphic symbols, driver: max. the horizontal elements of graphic symbols, the driver of additional horizontal elements of graphic symbols, the block of elements AND, and the adder, whose output is connected to the input of the video amplifier, and are connected in series the first input of the controlled pulse generator, the driver of the maximum vertical elements of graphic symbols and additional vertical elements of graphic symbols, the second input of which is connected to the output of the generator of vertical elements of graphic symbols connected to the second input of the block of elements And, the output of the generator of additional vertical elements of graphic symbols connected to the third input of the block of elements And, the fourth and fifth inputs of which are connected to the output of the register of the code of graphic symbols and the output of the generator of horizontal elements of graphic symbols, connected to the second shaper moves additional horizontal elements of graphic symbols and controlled pulse generator.  FIG.  1 shows a block diagram of the proposed device; in fig.  2 - block-circuit of controlled pulse generator; in fig.  3 is a block diagram of a horizontal (vertical) generator; graphic elements; in fig.  4 is a block diagram of the shaper of additional horizontal (vertical) elements of graphic symbols; in fig.  5 is a block diagram of the elements And; in fig.  6 shows the structure of the reproduced image.  The device contains a register of 1 code of goafic characters, a video amplifier 2, a beam deflection control unit 3, a cathode ray tube (CRT) 4, a controlled pulse generator 5, a generator of horizontal 6 and vertical 7 elements of graphic symbols, drivers of maximum horizontal 8 and vertical 9 the elements of graphic symbols, the formers of additional horizontal 10 and vertical 11 elements of graphic symbols, a block of 12 And elements, an adder 13 and an input 14 and an output 15 bus.  A device for displaying graphical information on a CRT screen is bottoned as follows.  Input information is received via input bus 14 from a central control unit (not shown): lowercase and frame sync pulses, a graphic symbol start playback pulse, a graphic symbol code and a code entry pulse, an initial setup pulse.  On output bus 15, the central control unit receives a signal for the end of the reproduction of the boundary element of the graphic symbol in the given line.  Unit 3 controls the deflection of the beam, which includes generators of horizontal and vertical sweeps, lowercase and.  deflection frame amplifiers, lowercase and frame deflection coils, mixes the beam of the CRT 4 across its screen from left to right and from top to bottom, as is the case in the television standard.  Lowercase and frame sync pulses are fed to the input of the unit 3 for controlling the beam deflection and modulation from the input bus 14.  The raster formed on the screen of the CRT 4 is modulated by the video amplifier 2 connected to the modulating electrode (modulator) of the CRT 4.  The code of the currently playing graphic symbol is entered into register 1 of the code of graphic symbols from the bus 14 of the input information on the code entry pulse, also coming from the bus AND of the input information.  The controlled pulse generator 5 is co. &Amp;).  pulse generator, working in standby. mode.  The start-up impulse from the bus 14 input information triggers the generator 5, which generates pulses arriving at the input of the generator 6 horizontal elements with a frequency equal to the ratio of the distance between two adjacent graphic symbols in the line to the length of the minimum horizontal element of the graphic symbol, t. e.  the period of the specified pulse series is equal to the period of reproduction of the minimum (single) graphic element.  At the time of the end of the playback of the horizontal edge of the element of this graphic symbol, t. e.  element, the right edge of which is bordered by the left edge of the first horizon.  The element of the adjacent graphic symbol, at the output of the generator b of horizontal elements, forms the impulse to end the reproduction of the graphic symbol in the given line, which translates the generator 5 into the general mode.  A sign of the start of the sleep mode from the output of the generator 5 (termination signal. the reproduction of the boundary element, the graphic symbol in the given line) is transmitted via the output bus 15 to the central control unit.   The generator 6 of horizontal elements forms horizontal elements with a length ji (FIG.  6) equal to the length of the minimum horizontal element, and with a length of two, three, and so on. d.  lengths of the minimum horizontal element.  Moreover, if the minimal horizontal element consists of a minimal horizontal elements, then the generator of 6 horizontal elements forms § at even and at O.  odd horizontal elements.  The length of these horizontal elements varies from a minimum of 11 a.  y-JL, up to a value equal to L T or X -jThe maximizer of maximal horizontal elements produces a maximal horizontal element C of length H a and can be a trigger that is set to one state at the moment of the beginning of the formation of the left edge of the first horizontal element of the graphic symbol and is reset to the zero state at the moment when the formation of the right edge of the last graphic element of the graphic symbol is completed.  Additional horizontal elements, j gtL whose length varies from l for a even and from a for o.  odd to L (L - /), produced by the shaper 10 additional horizontal elements.  Each additional horizontal element is obtained as the difference between the maximum horizontal element from the output of the former 8 maximum burners. zonal elements and the corresponding horizontal element from the generator output 6 horizontal elements.  In this way, the horizontal elements of all the graphic characters of the raster line are reproduced.  The set of raster lines related to graphic symbols located at the same level horizontally forms a symbol line.  The set of illuminated horizontal elements of each graphic symbol in all the raster lines of the character string forms the image of this graphic symbol.  Since in each raster line the character string is reproduced by successively horizontal elements of each raphic symbol of a given symbol, the code of the graphic symbol reproduced at a given MP is received from the bus 14 with a period equal to the horizontal scanning period.  Geyerator 7 vertical elements, to the input of which from the input bus 14 are received lower-case sync pulses, forms vergcal elements with height H, rabbi height of the minimum vertical element, and with a height equal to two, three, and so on. d.  heights of the minimum vertical element.  If the maximum vertical element is O is the minimum vertical elements, then the generator 7 vertical elements forms -f- when O is even and when O is odd vertical elements.  The height of these vertical elements varies from a minimum equal to, H, to a value equal to Hf or the Shaper 9 maximum vertical elements produces a maximum vertical element with a height H-B and can be a trigger that is set to one at the moment of the first formation symbol line strings and reset to the zero state at the moment of finishing the last string of the symbol string.  The shaper 11 of additional vertical elements produces elements, for 1sh. which varies from H when O is even and from f - (- - when O is odd to H (0-1).  Each additional vertical element is obtained as the difference between the maximum vertical elements from the output of the imaging unit 9 and the corresponding vertical element from the output of the generator.  7  Horizontal elements are generated by the generator 6 and shapers 8 and 10 for each graphic symbol of a symbol string, and the vertical elements by the generator 7 and shaper 9 and 11 are generated for all the graphic symbols of the string at a time.  The block 12 of the elements And forms the area bounded around the perimeter of the horizontal and vertical elements coming to the output from the outputs of the generators 7 and 8 and the formers 10 and 11.   ;. From the indicated elementary areas, the number of which is equal to CL-O, as a graphic symbol of a given shape, is made up of mosaic elements.  The number of elementary areas is equal to the number of bits in the graphic code on register 1.  At the output of block 12, only the area of the reproduced graphic is processed,. which corresponds to the unit in the corresponding.  The digit of the code of a graphic symbol per register -) re 1.  The adder 13, which may be OR elements, for example, of the type K 155 LA2, summarizes the areas of the parts of the reproduced graphic symbol, forms a full graphic symbol, the signal from the output of the adder through video amplifier 2 modulates the raster lines on the CRT 4.  The set of illuminated sections of raster lines forms a reproducible graphic symbol.  A pulse of the initial installation from the bus 14 sets the memory elements (trigger, regatters) that are part of the device blocks to the initial state.  The pulse generator 5 comprises a trigger 16, an inverter 17 and a delay element 18.  The start-up pulses at input 19 set the trigger 16 to one state, the playback end pulse of the horizontal boundary element of this graphic symbol at input 20 sets the trigger 16 to the zero state.  The trigger 16 is set to the zero state also at input 21 by the pulse of the initial setup.  Inverter 17 and delay element 18 closed in a ring form a self-excited oscillator with delayed feedback.  When the inhibit potential is present at the input of the inverter 17, which is connected to the output of the trigger 16 (the trigger 16 is in the zero state), the generator feedback is broken to the generator does not work.  When at the indicated input of the inverter 17 there is a resolving potential (the trigger 16 is in the single state), the generator feedback is closed the output 22 a pulse train is formed.  The duration of the delay 18 is equal to half the period of the formed impulse session.  The generator 6 of the horizontal elements contains a ring shift register 23, the elements OR 24-26.  In the General case, the number of elements OR is equal to -1 when O.  even and -1 for a and odd horizontal elements.  A pulse series from the generator output 5 pulses is input to the input 27 of the shift register 23, to the input 28 a setting pulse to the initial state from the bus 14.  ™ “3 first exit 29 shear“ - “,,. ,, „„ „„. - - „„ „- the register is the minimum gppnchpmt drinks. ,, -,, о ГЖ is horizontal element.  Combining the signal os from the first and second outputs of the register 23 by the element OR 24 forms the horizontal element at the output 30.   The 32 "horizontal elements of a rotary and quadruple length are formed. The rear frame of the signal from the last bit of the shift register 23 sets the first bit of the shift key 23 to the single state and through output 33 goes to the generator 5 to put it into the waiting state.  The number of bits of the shift register 23 is equal to the number of unit cells in the maximum horizontal element.  The structure of the generator 7 vertical elements is completely similar to the structure of the nerator 6 horizontal elements.  There may be a difference in the number of bits in the shift register and, accordingly, in the number of elements OR.  The input 27 of the shift register 23 of the generator 7 of the vertical elements 7 receives horizontal sync pulses, and the output 33 of the shift register is not used.  The shaper 10 of additional horizontal elements of graphic symbols contains bit elements 34-37 of one-to-one comparison, made, for example, on elements of type K155P5 (there are four elements in one housing).  Inputs 38-41 of the imaging unit 10 are connected respectively to the outputs 29-32 of the generator 6 and input 42 to the output of the imaging unit 8 of the maximum horizontal elements.  At the outputs 4346 of the former 10, pulses are generated, the duration of which corresponds to the lengths of the additional elements.  When the length of the maximum horizontal: th element in nine single x-ray elements (as assumed in the above example) at the outputs 43-46 are formed elements with a length of, respectively. ,,, single elements.  If the number of inputs of the elements OR 24-26 of the generator 6 increases in proportion to the length of the elements being formed, then regardless of the pin of the element, the number of inputs in the elements 34-37 of bitwise comparison is constant and equal to two.  The structure of the former 11 additional vertical elements of graphic symbols is similar to the structure of the former 10.  Block 12 elements And contains three-input elements 47-50 And; the number of which is equal to the number of bits in the code of a graphic symbol on regnstra 1 (the number of elements equal to four,. Take this as an example).  Inputs 51-54 are connected to the outputs of the first, second, third, and fourth bits of register 1 of the graphic character code.  Inputs 56-58 are connected to the outputs of the generator 6 horizontal elements, the former 8 maximum horizontal elements and the former 10 additional horizontal elements.  Inputs 59-62 are connected to the outputs of the generator 7 vertical elements, forming 9 maximum vertical elements and forming 11 additional vertical elements.  The outputs of the generators 6 and 7 of the formers 8-11 are held in accordance with the required set of area configurations of the parts of the graphic symbol. .  The signal at the output of each of the 47-50 elements appears lyp if there is an enable potential at the input connected to register 1.  Thus, the code of a graphic symbol determines the set of areas of the parts. the graphic symbol from which the graphic symbol is formed.  Any one of a set of graphic symbols is a graphic symbol without the use of a graphic symbol decoder commonly used in similar cases.  The leads from the outputs 63-66 of the block 12 are fed to the inputs of the adder 13.  In the proposed device abbreviated: hardware costs for your PC (e and decoding of graphic symbols while improving the quality of reproducible graphic symbols.

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Claims (1)

DEVICE FOR DISPLAYING GRAPHIC INFORMATION ON THE ELECTRON BEAM TUBE (CRT) SCREEN, comprising a beam deflection control unit and a video amplifier connected to a deflecting system and a CRT modulator, respectively, and a register of graphic symbols code, characterized in that, with the aim of simplifying the device and simplifying the device and simplifying the device display, it contains a serially connected controlled pulse generator, the first input and output of which are respectively the input and output of the device, the horizontal element generator graphic symbols, generator of maximum horizontal elements of graphic symbols, generator of additional horizontal elements of graphic symbols, a block of AND elements and an adder, the output of which is connected to the input of the video amplifier, and series-connected generator of vertical elements of graphic symbols, the input of which and the inputs of the graphic code register and control unit beam deflection connected to the first input of a controlled pulse generator, shaper maximum vertical graphic symbol elements and a generator of additional vertical elements of graphic symbols, the second input of which is connected to the output of the generator of vertical Q elements of graphic symbols connected to the second input of the block of elements AND, the output of the generator of additional vertical elements of graphic symbols is connected to the third input of the block of elements And, fourth and the fifth inputs of which are connected respectively to the output of the graphic code register and the output of the horizontal graphic elements generator Sgiach symbols connected to the second input of the additional horizontal elements of graphic characters and control pulse generator. SU „> 113820Я