SU1254538A1 - Device for displaying information on penetron screen - Google Patents

Abstract

The invention relates to the field of electronics, and more specifically to devices for displaying information that is output from a computer for visualization purposes. The purpose of the invention is to improve the accuracy of the device, which is achieved by introducing a controlled frequency divider, two controlled voltage dividers, and corresponding functional links. 2 Il. (LC N9 SP 4a SP with O)

Description

The invention relates to electronic engineering, in particular, to devices for displaying information produced from a computer for visualization purposes.

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

Figure 1 shows the block diagram of the device} in figure 2 - a schematic display of rasters on the screen of the penantron.

The device for displaying information on the screen of the penetron contains a penetron 1, a control unit 2, a video amplifier 3, a deflecting system 4, a line beam amplifier 5, a frame beam amplifier 6, a focusing system 7, a focusing block 8, a switched source

9 high voltage generator

10-frame sawtooth voltage, 11 horizontal sawtooth voltage generator, controlled frequency divider 12, as well as the first and second controlled voltage dividers 13 and 14.

Fig. 2a shows with a slanting hatching a raster in the color of a higher potential of the anode of the penetron, a horizontal hatching - raster in the color of a lower potential of the anode for the case when voltage divider 13 is used, and in Fig. 26 - the same when using both dividers 13 and 14.

The control unit 2 generates control signals, a video signal is generated at the first output of the control unit 2, a color code at the second output, frame sync pulses at the third output, and a horizontal sync pulse at the fourth output.

The device work, em as follows. .

Let the second output of block 2 to the beginning of the next frame establish a code corresponding to the reproduction of information in the color of the higher potential of the anode (green). By the same code, the controlled divider 12 frequencies and the controlled deltels 13 and 14 voltage are set to 1: 1 division modes, and video amplifier 3, focusing unit 8 and switched high voltage source 9 to modes that provide information in green. Lowercase sync pulses taken from the fourth output of control unit 2, through divider 12, are fed to generator 11 of horizontal sawtooth voltage, which, entering through divider 13 to input of amplifier 5 and further to deflecting system 4, provides horizontal lowering of the beam on the screen of penetron 1 Simultaneously arriving with

The third output of the control unit 2 of the frame sync pulse ensures the launch of the frame saw generator 10, which through the divider 14 and the amplifier 6 through the BOM deflection system 4 provides a frame sweep of the beam. The signal levels in the sweep chains are selected in such a way that the raster occupies the entire working area of the screen ne0ron (oblique hatching in Fig. 2a, b). The necessary information is reproduced by feeding from the first output of the control unit 2 to the video amplifier 3 and further to the module 5 torrentron of the video signal Corresponding information in green. The number of lines of the raster is determined by the ratio of the frequencies of the line and frame scans (N), and the speed of the beam on the screen (V) is the length of the line (L) and the forward stroke time of the line scan (t), i.e. V L / t or, if you do not take into account the duration of the reverse sweep, V L f with .1

At the beginning of the next frame, a code is set at the second output of control unit 2 corresponding to the color of the lower potential. Anode (red). At the same time, the output voltage of the source 9 is reduced to the required level providing a red glow, and the modes of the video amplifier 3 and the focusing unit 8 are changed in such a way as to ensure the necessary beam focusing and luminance modulation depth. At the same time, by the same code, the controlled dividers 12-14 are transferred to division modes in which, for example, the frequency of the horizontal difference and the dimensions of the raster are halved, i.e. line frequency f fp / 2, and line length L L / 2. Therefore, the speed of the beam on the screen v f

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Increase image brightness in red. At the same frequency. Frames f | (which is necessary to avoid raster flickers) the number of raster lines in red is N N / 2, i.e. reduced by two compared to the number of lines in green. Since the scattering capacity of the eye in red is lower than in green, it is possible to use the device in the reduced density of raster rows in red with the full raster size vertically, as shown in Fig. 2a by horizontal hatching (operation in the case where divider 14 provides the full size of the raster height). It is preferable to work with the raster size reduced by the divider 14 vertically (Fig. 26), which allows to keep in red the same specific vertical resolution as that in green.

Since the resolution of penetrons is significantly higher than the resolution of other types of color CRTs, the information capacity of the two-color screen area in the proposed device is no less than that of other color CRTs. Additional information is displayed in the working area of the screen in green (auxiliary alphanumeric). digital information, etc.

In the proposed device, by increasing the image luminance in the color of the lower potential of the anode, the accuracy of the information display significantly increases.

The use of the invention allows to improve the conditions of the operator and reduce the number of errors in the processing of information.

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Claims (1)

Invention Formula A device for displaying information on the screen of a penetron, containing a serially connected control unit and a video amplifier connected to the penetron modulator, the horizontal and vertical control inputs of the deflecting system of which are connected to the outputs of the horizontal and frame deflection amplifiers of the beam and the high-voltage input connected to the output of the focusing unit and the output of the switching high voltage source, whose inputs are from are connected to the second output of the control unit connected to the second input of the video amplifier, the third output of the control unit is connected to the input of the personnel sawtooth voltage generator, and the horizontal sawtooth voltage generator, characterized in that, in order to increase the accuracy of the device, it contains a controlled frequency divider , the first and second controlled dividers for the first time, the first inputs of which are connected to the second output of the control unit, the second input of the controlled frequency splitter is connected to the fourth output of the control unit The output of the controlled frequency divider is connected to the input of the horizontal saw-tooth voltage generator, the output of which and the output of the personnel saw-voltage generator are connected to the second inputs of the first and second controlled dividers by, - voltage, respectively, the outputs of which are connected to the inputs of the horizontal and current amplifiers frame deflection of the beam, respectively. / X / / X Editor A. Ogar Compiled by L, Abrosimov Tehred V. Kadar Proofreader M. Maksimishinets Order 4724/55 Circulation 455 Subscription VNIIPI USSR State Committee for inventions and discoveries 113035, Moscow, Zh-35, Raushsk nab., 4/5 Production and printing company, Uzhgorod, st. Project, 4 FIG. 2