SU955179A1 - Device for displaying data on cathode-ray tube screen - Google Patents

Description

one

The invention relates to automation and computing and can be used in devices for individual display of information.

A device for displaying information on a CRT screen, containing a memory CRT with a read coil and a load resistor, is known through a read amplifier connected to a CRT modulator and a deflection coil of which is connected to a scanner unit connected to a read coil. To improve image quality in

pulses are formed under the device.

light with steep fronts and short (for vertical lines) duration, which provides an indication of thin and clear lines of the graphic image 1..go

This device does not display half-tone information. Since the resolution of the device is determined by the resolution of the CRT screen, it cannot be used for the simultaneous visual analysis of images whose information volume exceeds the information capabilities of the CRT screen. This device does not use information about the position of the operator’s axis of view relative to the image on the CRT screen, and the entire image is reproduced with the same quality, which does not allow for decreasing the read current of the memory CRT in the target areas corresponding to the periphery of the operator’s field of view and increasing the read time (memory ) memorized CRT.

Closest to the proposed technical solution is a device for imaging injections on the screen of a cathode-ray tube (CRT), in which information in the central area of the field of view is reproduced with greater accuracy than in the area of peripheral vision. To determine the position of the central field of view of the operator on the CRT screen, the device contains a block for fixing the visual axis and a damping block 5 connected in series C2J. However, since the axis fixing unit is connected with the deviations of the CRT coils through the field of view and the processor controlled from the keyboard, it is necessary for the operator to concentrate his / her position and size of the information display area attention (i.e., fix the view) on the selected part of the screen for a time that is sufficient to manually enter the image conversion parameters into the processor, this device does not provide an operator that is synchronous with the eye movement of the operator PRECISION zone information display, making it difficult to integral sensing pattern to be displayed. The purpose of the invention is to eliminate these disadvantages, i.e. increase in the quality of the image due to its detail in the area of direct observation. The goal is achieved by the fact that a functional converter and a pulse generator were inserted into the device containing a memory CRT connected via a read amplifier with a CRT modulator (| the deflecting coil of which is connected to the scanner unit and connected in series to the visual axis fixation unit and damping unit) moreover, the visual axis fixation unit is optically connected to the CRT screen, the output of the damping unit is connected to one of the inputs of the pulse generator, the other input of which is connected to the scanner unit, under Connect to one of the inputs of the functional converter, the output of which is connected to the deflection coil 3 of the CRT, the output of the pulse generator is connected to another input of the functional converter and the focusing electrode and the CRT modulator 3. Fig. 1 shows a block diagram of the device; 2 is a diagram of the fixation unit of the visual axis; in Fig. 3 one of the variants of the functional transducer circuit. The device contains a memory CRT 1 with a focusing electrode 2 and a modulator 3 (reading light). A load element, such as a resistor, is connected to the output of the memory CRT 1 and, through the read amplifier 5, the modulator 6 of the indicator CRT 7. The deflecting coil 8 of the CRT 7 and the deflecting read coil 9 that stores the CRT 1 are connected to the scanner unit 10, the first one and the second through the functional converter 11 sweep current. The output of the controlled pulse generator 12 is connected with the functional converter 11J of the focusing electrode 2 and the modulator 3 of the readout lamp of the storage CRT 1. One of the inputs of the pulse generator 12 is connected to the sweep unit 10, and the second input through the damping unit 13 to the visual fixation unit 1 the axis containing the sensors 15 and 16 of the biopotentials, the outputs of which are connected to the inputs of the corresponding amplifiers 17 and 18 of biopotentials. The outputs of the biopotential amplifiers 17 and 18 are the output of the fixation block 1 of the visual axis. The functional converter 11 comprises an electrically controlled potentiometer 19, the inputs of which are the inputs of the functional converter 11, the input of the controlled signal being connected to the sweep unit 10, and the input of the control signal to the pulse generator 12. The output of the controlled potentiometer 19 is connected to the input of the DC amplifier 20, the output of which is the output of the functional converter 11 connected to the read coil 9 When the device is running, a video signal containing information about the CRT 1 stored in the form of a potential relief on the target when controlled by block 10 The sweep sweep of the readout coil of the readout coil 9 is supplied from a resistor to the readout amplifier 5. From the output of the readout amplifier 5, the amplified video signal is fed to the modulator 6 of the indicator CRT 7 -GOOS which is deployed by the deflection coil 8 and the television raster defined by the scanner unit 10. The sensors 15 and 16 of the biopotentials of the block 1A of fixation of the visual axis, installed at the eye of the operator viewing the image on the screen of the CRT 7, remove the biopotentials varying when the eye rotates vertically and horizontally by an amount proportional to the angle of rotation of the eye

from the average position corresponding to the viewing of the image in the center of the screen. The electrical signals at the outputs of sensors 15 and 16, which are proportional to the vertical and horizontal displacement of the eyes, and hence the visual axis of the operator relative to the center of the image and the television raster of the CRT beam 7, are amplified by amplifiers 17 and 18 of the bio potential of the fixation unit 14 the visual axis and enter the damping unit 13, in which the high-frequency component resulting from the eye-15 th tremor is eliminated, the amplitude of the turns of the eyes, at which the amplitudes of the turns of the head are much less s, the change caused by the considered section image. From the output of the damping unit, the voltages (in the intervals between the eye jumps) voltages corresponding to the coordinates of the intersection point of the visual axis with the surface of the CRT screen 7 are fed to the control input of the generator 12, which is synchronized by the block 10. The generator 12 produces two series of pulses, a delay which relatively sync horizontal and frame pulses delivered from the unit 10 sweeps are determined by the values of the control voltages supplied from the damping unit 13. The frame and line pulses produced by the generator, whose frequency position in time corresponds to the scan of the image area to which in the data | The moment looks at the operator, and the duration and form correspond to the shape of the curve changing the resolution of the eye over the field of view in the screen plane in the vertical and horizontal directions with a fixed distance of the operator from the screen of the CRT 7, are fed to the control input of the functional converter 11 to control the rate of change of the scanner current of the read beam of the storage CRT 1 supplied from the scanner unit 10 through the functional converter 1 to the readout coil 9-The rate of current rise times ertki at the outputs of two-channel amplifier 20 is inversely proportional to the instantaneous value of the voltage control pulses to the input 19 of the potentiometer Thus the speed of movement of the scanning beam on the target storage CRTs 1-lan

the corresponding part of the image that the operator is looking at at that time decreases, and increases in the rest of the target, and since the speed of the CRT beam 7 remains constant, the image in this part of the screen corresponding to the central area of the operator’s view field of the visual axis), is stretched due to a proportional deterioration in the resolution of the eye to the periphery of the compression field, image.

Claims (2)

And (1 pulses from the output of the generator 12 are also fed to the focusing electrode 2 of the storage CRT 1 to focus the reading beam defocused to average the information contained between the read lines in the target areas corresponding to the periphery of the field of view of the operator and the modulator 3 to increase the reading beam current to the nominal one, which corresponds to an increase in the image contrast in the center of the field of view. In the center of the field of view and its surroundings, the images on the CRT 7 screen are reproduced from the maximum distance contrast and contrast to the periphery of images decreases, but this is not noticed by the operator, since the movement of the quality view area on the screen occurs synchronously with the movement of his eyes. For the proposed device, the angular dimensions of the CRT screen are about 22 ° can be 3-5 times less than the resolution of the target of the storage CRT with the same detail of the image observed by the operator, what would have been when using the indicator CRT with a resolution greater than The resolution of the most memorable CRT. When using memory CRTs with a resolution of up to 3000 lines and maximum information recording density, the proposed device provides high quality of an operator-watched image on a standard 600-channel television screen. Since the current of the read beam over a larger area of the target of a CRT memory (over 90) is reduced by a factor of 2 to 5, and the section scanned by the beam with a nominal current has small dimensions (about .2 X) and moves along. then, the destruction of the potential relief on the target and the total increase in the memory time of the CRT memory is slower than usual. Thus, the proposed device improves the quality and real volume of the visual information being analyzed simultaneously without increasing the screen resolution of the CRT indicator and increase the I time of the memory used in it remembering CRT. The invention device for displaying information on the screen of a cathode ray tube (CRT), containing a storage cathode ray tube (SELT) connected through a read amplifier to a modulator of a CRT, the deflecting coil of which is connected to the development unit, and connected in series block the fixation of the visual axis and block 9 9. damping, characterized in that, in order to improve the image quality due to its detailing in the direct observation area, it contains a functional transducer and a pulse generator, the visual axis fixation unit being optically coupled to the CRT screen, the output of the damping unit pulses, the other input of which is with a scanner unit connected to one of the inputs of the functional converter, the output of which is connected to the deflection coil of the PLCT, the output of the pulse generator It connects to the other input of the function generator and the focusing electrode and the modulator ZELT. Sources of information taken into account during the examination 1. USSR author's certificate number ВП237, к / 1. G 06 K 15/20, 1975. 2. USSR author's certificate No. 4) 222, cl. G About K 15/20, 197t (prototype). Phase.1 L / y fff rru0ttpoSoHtf 1J ff / ff f / iff /) a / 77apa. J -F FIG. G / f / tamya / ffe cvt / rrttrfSaffvjf / 77 / rona ptr ffpmoH e / fifffy fffoS Cpife.3