SU1304055A1 - Device for displaying information on screen of cathode-ray tube - Google Patents

Abstract

The invention relates to digital computing, in particular, to input / output information devices using a CRT, and can be applied in a wide variety of computing systems that require high-quality display of output data. The purpose of the invention is to improve the accuracy of the device by organizing an automatic search of the point in question in the assigned area defined by the operator, the search time is reduced to 1 sweep time of one frame, the error of the coordinates is eliminated when displaying information by single points and the possibility of missing a target, since points located in the search zone are fixed independently of the operator, and it is possible to investigate the displayed processes over time. I h. item f-ly, 2 ill. (O (L 00 o 4: O JV SL

Description

The invention relates to digital computing, in particular, to input / output devices using CRT and can be applied in computer systems where a high-quality display of the output data is required.

The purpose of the invention is to improve the accuracy of the device.

FIG. I shows the block diagram of the device; in fig. 2 - search area shaper.

The device contains 1 image element generator 1, synchronization and damping pulses generator 2, horizontal scanning generator 3, frame scanning generator 4, first pixel counting unit 5, comparison unit 6, 7 rows counter, 8 matching unit, video amplifier 9, second comparison unit 10, deflecting system 1, CRT 12, mixer 13, search area generator 14, element 15, counter 16 number of points, third comparison block 17, register 18 number of points, register 19 coordinates Л, generator 20 marks, register 2 coordinates Y, indicator 22 x coordinates, and cators Y coordinates 23, 24 of the indicator points. Positions 25-29 designate the outputs of the search area generator 14, which contains the initial coordinate code comparison element 30, the final coordinate X code comparison element 31, the initial coordinate Y code comparison element 32, the final coordinate Y coordinate comparison element 33, and elements 34- 36, element OR 37, triggers 38-40, elements AND 41 and 42. At positions 43-45 designate the driver inputs.

The device works as follows. The pulses of the generator 1 of the image elements, which specify the raster quantization tag, are fed to the input of the counter 5 image elements and the generator 2 of synchronizing and damping pulses. Overflow pulses from the counter 5 of the image elements are fed to the input of the counter 7 lines. The inputs of counters 5 and 7 are connected respectively to the first 6 and second 10 blocks of bitwise comparison. Parallel binary codes of X and Y coordinates arrive at their second inputs. At the moment of equality of coordinate codes and three-digit counter codes, blocks 6 and 10 produce pulses, if they coincide in time, block 8 of coincidence produces a video-label impulse. This pulse through mixer 13 and video amplifier 9 is fed to a CRT modulator 12 and displayed on the screen. Generators line 3 and personnel 4 sweeps through the deflecting system 11 sweep the beam across the CRT screen.

The signal search area is determined by the search area generator 14. the search is outlined by a rectangle, the size and location of which are determined by the values of the binary codes of the initial and final coordinates A and Y, given by the operator.

0

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The first input of the comparison element 30 is supplied with the initial coordinate code X, and the second input of the comparison element 31 is the code of the final coordinate X. The other inputs of the comparison elements 30 and 31 receive the codes of the 5 image pixel counter. At the moments of equality of the X coordinate codes and the current counter codes, the comparison elements 30 and 31 generate pulses.

The first input of the comparison element 32 is supplied with the initial coordinate code Y, the second input of the comparison element 33 is the code of the final coordinate Y. The other codes of these comparison elements are fed with the current codes of the counter of 7 lines. At the moments of equality of these codes, elements 32 and 33 of the comparison produce impulses.

When the signals from the outputs of elements 30 and 32 of the comparison at the output of the elements 35 and 35 are matched, the pulse that switches the trigger 38 to one state opens the output signals of elements 42 and 41 with its output signal. At the same time, the pulse from the output of the element 35 through the element OR 37 enters the S-input of the trigger 39 and switches it to one state. The signal from the output of the trigger 39 is fed to the first input of the mixer and is the video signal of the upper horizontal line delineating the search area.

The signals from the outputs of elements 30 and 31 of the comparison, the passage of the center, and through the open elements AND 41 and 42 to the second and third inputs of the mixer 13, are video tags that form side lines on each raster line (with (left and right) vertical lines, outlining the search area. Simultaneously with the passage of the first signal from the output of the comparison element 31, the trigger is reset to its original state; -per 39 - the horizontal pin is terminated.

When the signals from the outputs of comparing elements 30 and 33 coincide at the output of the element 34, a pulse is formed which, having passed through the element OR 37, switches on the trigger again, 39 begins to form the lower horizontal line of the search zone. By the next signal from the output of the comparison temperature 31, the trigger 39 is turned off to its initial state — the formation of the lower horizontal line is stopped. At the same time, the signals from the outputs of the elements 31 and 33 coincide. At the output of the output of the 1 st and 36 a pulse is generated, which switches off the trigger 38 to the initial state. The elements 41 and 42 are closed. The formation of the side lines is stopped.

The trigger 40 is turned on by the first signal forming the rectangle and is turned off by the last signal, i.e. it is turned on all the time while the search zone is outlined. This trigger by a signal from its output opens the element 15, razp11a the passage of signals from the output of block 8 to the counter input 16 of the number of points, which counts all video tags, forwarded to the world of the signals at the output of block 8

until the counter codes 16 for the number of points and the code at the input 46 for specifying the point number (in the initial state, the code corresponding to the maximum possible number of the point in question is fed to this input).

The signal from the output of the comparator block 17, which appears when the codes at the output of the counter 16, the number of points and the code of the number of the point studied, set by the operator at input 46, occurs, is taken up the coordinate codes of the point being studied in registers 19 and 21 of the X and Y coordinates, and the element 15 is also closed, i.e. the counting pulses to the input of the counter 16 are stopped, and the code at its output corresponds to the number of the point being examined.

In the initial state, the code at the output of the counter 16 of the number of points has a value corresponding to the number of points in the search zone. Registers 19 and 21 of the X and Y coordinates contain codes corresponding to the value of the origin.

Codes of the coordinates of the investigated point from the outputs of registers 19 and 21 of the coordinates X and Y are fed to the inputs of the corresponding indicators 22 and 23.

The signal from the output of the third comparison block 17 simultaneously with the writing of the codes starts the generator 20 of the label, which gives a signal to the fourth input of the mixer 13. The number of the point to be studied is recorded in the register 18 of the number of points by the signal from the output of the element 35 (28 output of the search zone 14) . In addition, this signal resets the counter of 16 points. The process of searching for the point of interest and reading its coordinates is repeated from frame to frame.

Thus, the label on the CRT screen appears under the operator-defined point of the automatically detected signal only in the search area, also defined by the operator. At this moment, a digital readout of the coordinates of this point is made on the indicators. The search zone can be installed in any area of the CRT screen, of any size, depending on the desire of the operator. The minimum size of the search zone is one horizontal sweep element and one vertical line. The maximum size is the entire screen.

Thus, as a result of organizing an automatic search in the specified area defined by the operator, the search time is reduced to a minimum and becomes equal to the sweep time of one frame, the error of the coordinates is eliminated when displaying information by individual points, as well as the possibility of skipping the target in the search area is fixed independently of the operator. In addition, reducing the time to determine the coordinates of an object up to the sweep time of one kldra allows one to study the displayed processes over time, as well as to statistically process the incoming information.

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Claims (2)

Invention Formula I. A device for displaying information on a cathode-ray tube screen, containing an image element generator, the first output of which is connected to the input of an image element counter, the overflow output of which is connected to the input of a row counter, information outputs of the image element counters and lines are connected to informational the inputs of the X and Y coordinate registers and the first inputs of the first and second comparison blocks, the second inputs of which are the code inputs 0 coordinates A and K of the device, the outputs of the first and second comparison blocks are connected to the inputs of the match block, the outputs of the X and Y coordinate registers are connected respectively to the coordinate indicators L and Y, the mixer, the output of which is connected to the input 5 video amplifier, the output of which is connected to a CRT modulator, the deflection system of which is connected to the outputs of the generators respectively) and frame sweeps, whose inputs are connected to the first and second outputs of the generator of synchronizing and damping pulses, the third output of which is connected to the cathode of the CRT, and the input is connected to the second output of the image element generator, characterized in that, for the purpose of new device accuracy, it contains a search area generator, the information inputs of which are input to Start and end coordinates A and Y of the device, the first and second information inputs of which are connected respectively to the information outputs of the pixel counters and lines, the AND element, the counter of the number of image points, the third comparison unit, the first input of which is the input of the number of image points of the device , the label generator, the register of the number of points and the indicator of the number of points whose input is connected to the output of the register of the number of points, whose control input and the reset input of the counter of the number of image points are connected to ne output output of the search zone imager, the second output of which is connected to the first input element 0 / whose second input is connected to the output of the third comparison unit connected to the control inputs of the coordinate registers L and K and the input of the label generator whose output is connected to the first control input of the mixer , the third input of the element AND is connected to the output of the coincidence unit connected to the second control input of the mixer, the output of the element AND 0 five five connected to the information input of the counter of the number of image points, the first information output of which is connected to the second input 1M of the third comparison unit, the second information output of the counter of the number of image points is connected to the information input of the register of the number of points, the third, fourth and new outputs of the search area former are respectively connected to video inputs horizontal and vertical lines of the mixer. 2. Device but n. 1, characterized in that the shaper of the noisk zone contains four comparison blocks, the first time inputs of which are information inputs of the former shaper, the second inputs of the first and second comparison blocks are the nerve information input of the shaper, the second inputs of the third and fourth comparison blocks are the second the information input of the imager, AND elements, three triggers and the OR element, the output of the first comparison unit is connected to the first the inputs of the first, second and fourth elements And, the output of the second comparison unit is connected to the first inputs of the third and fifth elements And and the second trigger, the output of the third comparison unit is connected to the second the input of the second element I, the output of the fourth comparison unit is connected to the second inputs of the first and third elements AND, the output of the first element AND is connected to the first input of the OR element, the output of the second element I to the second input of the OR element and the first input of the first trigger and is the first output of the block, the output of the third element And is connected to the second input of the first trigger, the output of which is connected to the second inputs of the fourth and fifth elements And, the outputs of which are connected to the inputs of the third trigger and are respectively the fourth and fifth outputs of the former, the second and third outputs of which are the outputs of the third and second triggers, the second input of the second trigger yen with the release of the element OR. Compiled by I. Zaginayko Editor I. KasardaT.khrsd I. VeresKorrektor A. Zimokosov Order 1315/51 Circulation 434 Subscription VNIIG1I USSR State Committee on the case of inventions and discoveries 1 13035, Moeva. Zh-35. Aushska nab. D. 4/5 Production-on. Graphic iredpium, Uzhgorod, st. Proekgna, 4