SU729585A1 - Information input arrangement - Google Patents

Description

(54) DEVICE FOR INFORMATION OUTPUT

The invention relates to automation and computer technology and can be used in devices for displaying information output from a digital computer to an electron beam tube (EDT) screen.

A device for displaying information on a CRT screen is known, comprising a register, a backlight unit, a decoder, a pulse generator, a trigger, a signal sequencer, amplifiers in vertical and horizontal directions, a synchronization unit, and a switching unit 1.

However, this device is characterized by low image accuracy.

Of the known devices for displaying information on a CRT screen, the closest to the invention according to the technical essence is a device containing serially connected register of X coordinate, connected to information buses, digital-to-analog converter (CAC) of X coordinate and deviation amplifier along X coordinate connected to CRT system, and serially connected register of Y coordinates, connected to data buses, digital-to-analog converter of Y coordinate

and amplifier off1 e ::;: .. looopo: nlte Y, connected to the o.-c. on the CRT system 2.

The disadvantage of this device is the impossibility of making a smooth adjustment of the density of the image elements within the specified geometric dimensions of the raster.

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

This is achieved by the fact that the known device E is inserted into the gain control unit connected to the output control bushes and the deviation amplifiers in the X and Y coordinates, and the serially set reference signal unit and the comparator unit whose output is connected to the output control bus. and the second input is to the deviation amplifiers along the X and Y coordinates.

The drawing shows a block diagram of the device.

The device contains registers I and 2 of the X and Y coordinates, respectively, whose inputs are connected to information buses 3, 4 and 5, 6, respectively, digital to analogue converters 7 and 8, connected to the outputs of registers 1 and 2, deflection amplifiers 9 and 10 along the X coordinates and Y, respectively, one input connected to the outputs of the DAC 7 and 8, and the other inputs to the deflection system of the CRT 11, and the control inputs to the outputs of the gain control unit 12, which is connected to the second control shaft 13 and 14, and series-connected block set reference signal 15, the comparator 16, whose output is connected to output the control schinam 17 and 18, and the second input - to the deflection amplifiers 9 and 10 to the coordinates X and Y.

The device works as follows.

To display information on a CRT screen by forming a raster with an arbitrary number of display elements in the row NX and the number of rows Ny while preserving the geometric dimensions of the main raster, we determine the maximum value of the deflecting signal in the generated raster, where Nj; Nv (n, m is the width of registers 1 and 2); the number of image elements in the row with coordinates 0-y-1; 2 - the number of lines with coordinates 0th-1 of the main raster.

For this, it is necessary to set the minimum gain values of the amplifiers of the deviations 9 and 10 on the X and Y coordinates by issuing the corresponding codes from the digital computer to the control unit 12. In the reference signal setting block 15, the values of the signals corresponding to the maximum values of the deflection signals on the X and Y main raster. The outputs of registers 1 and 2 receive the codes A, (- 1), respectively, which have the value of the coordinates of the last YD point in the line, and Ay (Ny-1) is the coordinate of the last Ny-th line of the generated raster, where A and Ay are equal to the integer value the ratios of the increments of the deflecting signals along the X and Y coordinates of the formed and the main rasters, obtained from the ratios. Codes from registers 1 and 2 coordinates and Y are fed to the DAC 7 and 8, converted into analog signals and fed to amplifiers 9 and 10. Incremental codes are output from the digital computer to control unit 12, the output of which is fed to deviation amplifiers 9 and 10 , along the X and Y coordinates, changing the value of the gain factors and bringing the value of the deflection signals to the reference level. The comparison of the deflection signal with the reference one is carried out in the comparison block 16. If their values coincide in the block 16, the signals are generated which enter the digital computer and stop issuing the code c to the control unit 12, after which the device is ready for the operating mode.

In operation mode, register 2 from the digital computer receives the code corresponding to the first line, and / register 1 - the code of consecutive digits with the difference A, corresponding to the coordinate value of the points of this line. Codes of consecutive digits coming into register 2 and corresponding to the value of the coordinates of the row numbers of the generated raster have the difference Ay. The contents of registers 1 and 2 are converted to analog signals on the DAC 7 and 8, which after

0 amplifiers in amplifiers 9 and 10 are fed to the deflecting CRT system P. After issuing the NX-NOY point (the last point of the line of the formed raster), the electron beam will pass a distance equal to the line of the main raster. From the digital computer, register 2 receives the code corresponding to the coordinate value of the next raster line, and register 1 receives the coordinate code of the beginning of the line, then the coordinate codes of the subsequent points of this line. Then the cycle is repeated.

0 The proposed device allows to smoothly change the density of elements in a line and the number of raster lines from their specified maximum value to the minimum, which is necessary when studying a raster method allowing

 abilities of space-time light modulators mounted on CRT targets. In addition, the device makes it possible to expand the raster structures when recording different spatial

O frequencies.

Claims (2)

The invention is a device for outputting information, containing serially connected register of X coordinates, connected to information shells, digital-analog i X-coordinate transducer and X-axis deflection amplifier connected to a deflection system of a cathode-ray tube, and the Y-coordinate register connected in series, connected to data buses, a D / A Y-coordinate converter and a Y-coordinate deflection amplifier connected to a CRT deviating system, different By the fact that, in order to increase the accuracy, a gain control block is inserted into it, connected to the output control wands and deviation amplifiers along the X and Y coordinates, and a series-connected reference signal setting unit and a comparison unit, the output of which is connected to the output control bus, and the second input to the deviation amplifiers along the X and Y coordinates. Sources of information taken into account in the examination 51. USSR author's certificate No. 530338, cl. G 06 F 3/14 1976. 2. Bezrodny M.S. Basics of building a device for quick information output. M., Energie, 1973, p. 71 (prototype). 17 UBM