SU739595A1 - Graphical data display on the screen of cathode ray tube (crt) - Google Patents

Description

(54) DEVICE FOR DISPLAYING GRAPHIC INFORMATION ON ELECTRONIC BEAM ON SCREEN The invention relates to a computing technique and is intended for use in devices for the on-line presentation of visual information. Devices are known for displaying images composed of rectangular elements on a CRT screen, comprising a forming unit P1) of coal elements connected to an increment code bus in x and y coordinates, a luminance block, connected to a coding bus and a CRT, scanner blocks the x and y coordinates of the coordinates connected to the CRT and the corresponding code buses of the x and y coordinates flj. However, the known devices do not allow the formation of flat images with boundaries inclined with respect to the coordinate axes and y, as well as three-dimensional images. The closest in technical essence is a device for displaying information on the screen of a cathode ray tube containing a FORTRUBET (CRT) unit of the world’s rectangular elements, the inputs of which are connected to the code lines of the increments along the x and y coordinates and the 5fko code bus, the elevators of the right angle forming unit elements are connected with CRT, code-analogue converters in x, and y coordinates, beam scanners in henna coordinates, inputs of beam scanners in x and y coordinates are connected to the x and y coordinate code buses, .sv their outputs are connected with the cathode ray tube, the other outputs, block forming rectangular cells are connected to the inputs of the code-to-analog converters to the coordinates X and y. Digital to analogue converters are attached to beam sweepers along the x and y coordinates. A disadvantage of the known device is that it is impossible to form flat surfaces with borders inclined relative to the x and y axes. In addition, the device does not allow three-dimensional images to be displayed on a CRT screen.

The purpose of the invention is to expand the scope.

The goal is achieved by the fact that it contains multiplying blocks, keys for henna terms, an adder, a voltage code bus proportional to the cosine of an angle, a code voltage bus proportional to the sine.

the bus voltage coding angle is proportional to X cosine and sine signs, the outputs of the codanalogue preovers are connected to the first inputs of multiplier blocks, the second inputs of which are connected to the coder's voltage buses proportional to the cosine and sine of the angle, and the output is connected to the first key input the x coordinate, the second input of the CT (31X) go is connected to the voltage code bus proportional to the signs of the cosine and sine of the angle, respectively, the output of the key along the x coordinate is connected to the additional input of the beam scanner along the coordinates e x, the converter output is the code analog in the Y coordinate. the key output in the y coordinate is connected to the first and second inputs of the adder, the output of which is connected to the auxiliary input of the beam decoupling unit on the y coordinate.

FIG. 1 is a block diagram of a device for displaying graphic information on a screen of a cathode ray tube (CRT) of FIG. 2 shows the image element and the type of sweep voltage along the X and y coordinates at various angles; in fig. 3 is an example of an image formed on a SLT efan.

A device for displaying graphical information on a screen of a cathode ray tube (CRT) contains a block of shapes (ani rectangular elements connected to a CRT with code lines 2 and 3 increments along the x and y coordinates, code of 4 luminance and converter 5 and 6 X and Y coordinates. Pre-Phaser 5, the codanalogue on x coordinate is connected to multiplic units 7 and 8, connected respectively to code buses 9 and 1O of cosine and sine angle and keys 11 and 12 of polarity on x and y coordinates, connected to, code buses 13 and 14 characters to the sine and sine of the angle. 11 polarity on the X coordinate is connected to the beam sweep unit 15 on the X coordinate connected to the CRT, and code bus 16 x coordinate. The polarity key 12 on the y coordinate is connected to the primary input of the adder 17, the second input of which is connected with the transform: by teleme 6, the code-analogue in the y coordinate, and the output is connected to block 18 of the beam sweep in the y coordinate, which is connected to the CRT and the code YU 19 Y coordinate

The device works as follows.

The device forms on the CRT screen a complex halftone image of parallelograms with the following dimensions AX, sides, coordinates of the CS and at the sad point of the beam sweep, brightness O and angle cC (see Fig. 2 and 3). In each cycle of accessing the device, the codes X and y are received on code buses 16 and 19 of the x, y coordinates on the blocks 15 and 18 of the beam sweep to the x and y coordinates, and the beam on the CRT screen is set to the specified initial track. At the same time, the codes X, x, y for code buses 2–4 enter block 1 of forming rectangular elements, providing, at c - O (right corner), the beam sweeps in Gf cases of sides L x, d y with brightness 3, as in the known device B In case of C O (non-degenerate parallelogram), the block 1 of the formation of rectangular elements abuts the sawtooth voltage (fc) and Lr (-t L supplied to the corresponding converters 5 and 6 code-analogue in X and Y coordinates. As shown in Fig. 2, for mapping to CRT screen odirgche parallelogram necessary transform Vat said voltage f (-b), (-b) .k mean:

and, (i) COScl. (COSdL),

U, (t (i) sihd-5ig nCein jL),

where u is the sweep voltage

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BitfM H - sign code.x. In accordance with the indicated ratios, the outputs of the multiplying blocks 7 and 8 form the voltage of the IL, respectively) coSdLvi (i e at outputs 11 and 12 of the ground voltage - voltage (-b) co5t {. 5igfn (Coe (-t) si ld -Sign (sinol) - Usi voltages are applied to the inputs of blocks 15 and 18 of the sweep of the beam along the x and y coordinates, which ensure the formation of one image element on the CRT screen. At that, the device operation cycle is entered before receiving the codes of the lightweight element. stress proportional to sine and cosine of an angle and their signs, two multiplicities Combined blocks, adder and polarity keys make it possible to form complex back tone images on a CRT screen, including three-dimensional, composed of parallelograms with arbitrary sizes of sides, location on the screen, angle at base and brightness. The ability to form barrels on a CRT screen of elements such as rectangles and parallelograms with an arbitrary location, dimensions of the sides and angles at the base, on the latter allows complex halftone images to be displayed (see FIG. 3) of the minimum number of elements constituting the dash figure. When a parallelogram type image is formed on a CRT screen by a known device, it is necessary to synthesize it from Y rectangles, thereby obtaining unsatisfactory accuracy and quality of the lateral sides of the parallelogram, while the parallelogram formation time on the screen is significantly increased due to the need for a multiple access to the device . Increasing the number that is appropriate for a device when displaying an image on a CRT screen increases the time it takes to form, which leads to a decrease in the frequency of reproduction of the image on the screen and to the flickering of the image. The proposed device, in contrast to the well-known one, allows forming more complex half-tone images with borders on the CRT screen more accurately and with higher quality. inclined with respect to KoopflHHaTHbnvi axes x and y, including three-dimensional, with high reproduction frequency . BACKGROUND OF THE INVENTION A device for displaying graphical information on the screen of an electron beam tube containing a unit for forming rectangular elements, inputs for two are connected to code buses of increments along the coordinates xl; Y and coding bus "busses", the outputs of the unit for forming rectangular elements are connected with a CRT, the transducers are encoded in the x and y coordinates, the beam scanners in the x and y coordinates, and the inputs of the beam scanners in the x and y coordinates and y, and their outputs are connected to a cathode ray tube, the other outputs of the formation of rectangular elements are connected to the inputs of converters of code-analogue in coordinates xi y, which is different from the fact that, in order to expand the field of application by forming flat images It has boundaries inclined to the axes of the X and Y coordinates and displays three-dimensional objects, it contains multiplication blocks, keys in the x and y coordinates, an adder, a voltage code bar proportional to the cosine of an angle, a code bar of a direction proportional to the sine of an angle, code wheels voltages proportional to the signs of the cosine and sine of the angle; the outputs of the code-analogue transducers are connected to the first inputs of the multiplying blocks, the second inputs of which are connected to the code buses for a strain .... not proportional to the cosine and sine of the angle, The sensor is connected to the first key input at the x coordinate, the second input is connected to the code by voltage buses proportional to the cosine and angle sine signs, respectively, the key output along the x coordinate is connected to the additional input of the scanner of the beam along the x coordinate, the output of the converter the y coordinate and the output of the key along the y coordinate are connected to the first and the secondary inputs of the adder, the output of which is connected to the auxiliary input of the beam decoupling unit along the y coordinate. Sources of information taken into account during the examination 1. CCCS author's certificate for application No. 2344083 / 18-24, cl. GO6 K 15/20, 28.O2.77. 2. USSR author's certificate for application No. 2329662 / 18-24, cl. G 06 K 15 / 2O, 07.01.77 (prototype),

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Claims (1)

. SUMMARY OF THE INVENTION A device for displaying graphical information on an electron • beam tube containing a block for forming rectangular elements, ⁵⁰ inputs of which are connected to the increment code buses along the x and y coordinates and the brightness code bus, the outputs of the block for forming rectangular elements are said with a CRT, converters of the codanalog “r at the x and y coordinates, the beam scan blocks at the x and y coordinates, the inputs of the beam scan blocks at the x and y coordinates are connected to the code buses of the x and y coordinates, and their outputs are connected to electrical with a beam, other outputs of the block for the formation of rectangular elements are connected to the inputs of the code-analog converters along the xy y coordinates, characterized in that, in order to expand the scope by forming flat images with boundaries inclined to the x and y coordinate axes and display three-dimensional objects, it contains multiplying blocks, keys along the x and y coordinates, an adder, a code bus voltage proportional to the cosine of the angle, a code bus direction proportional to the sine of the angle, code bar voltage proportional to the signs of the cosine and sine of the angle, the outputs of the code-analog converters are connected to the first inputs of the multiplier blocks, the second inputs of which are connected to the code buses of a voltage proportional to the cosine and the blue of the angle, and the output is connected to the first input of the key along the x coordinate, the second the input is connected to the code 'voltage buses proportional to the signs of the cosine and sine of the angle, respectively, the output of the key in the x coordinate is connected to the additional input of the beam scanner in the x coordinate, the output of the converter is a code of the coordinate y and the output key from the coordinate is connected to first and second inputs of the adder, whose output is connected to the additional input blo'ka coordinate y decoupling beam.