SU479133A1 - Device for displaying color information - Google Patents

Description

associated with the amplitude discriminator 16 and block 17. The device operates as follows. The data on the type of image being formed (the luminous signal; and its tininess (graphic or symbolic), color and location on the screen produces an input unit 1, which may be a digital computer. When forming a color image, its description is digitally fed simultaneously to the code-color decoder z and the image forming unit 6. Only a block 3 is used to form a monochrome image. Depending on the type of formation The image and its colors, which are determined by the code block of the data input unit I, the code-color decoder 2 produces chroma signals of various lengths and discretely varying amplitudes. These signals are sent to FM 4 whose carrier frequency is equal to an integer multiple of the horizontal readout frequency In accordance with each discrete value of the chroma signal, the frequency of the FM 4 carrier is incremented by an integer multiple of times. When no chroma signal is received, FM 4 generates a quiescent frequency fo. To represent the familiarity in one of the colors - red iR or blue B - code-color decoder 2 produces chroma amplitude signals, respectively, f / i, U, and U2 / Ui K .. The first value of the chroma signal corresponds to PO - "/ psc value carrier, the second value - FO - 2 / p. When playing familiarity in green O, cyan, magenta, yellow, the code-color decoder generates chroma signals with amplitude of t / 3 and, respectively, Ub, and, and, L, the color signal level corresponds to FQ - dg / p. FM frequency 4. Block 3 of the formation of information, control of the current of the recording system 5, displays the recording beam of the ZELT 6 to the required familiarity of the working surface of the dielectric target 7 and expands it into a microraster. The size of the microrastra is determined by the type of image being formed. Simultaneously, the luminous signal from the information generation unit 3, and from FM 4, the carrier modulated in frequency by chrominance signals goes to the recording modulator 8 and controls the density of the electron recording beam. As a result, during each row of the microraster, a potential relief is formed in the form of successive points. Vertically, points are located under each other. Therefore, the charged terrain corresponding to one of the familiarity colors has the form of vertical lines with a certain distance between them in the horizontal direction. When the color changes from familiarity to familiarity, the distance between the formed lines of potential relief within each sign of the region also changes. With such an arrangement of potential relief, there is an ordered phase correlation. Therefore, even in the case when the read beam partially or completely scans two lines, the mutual influence of the read signals is insignificant. There is no need for B to precisely align the read beam and the lines of the microraster of the record. The amplitude modulated signal (capacitance component) is recorded at different depths of the potential relief. Thus, in the process of recording on the dielectric 7 of the ZELT 6, the signals of the chromaticity and luminance of the image being formed are fixed with superimposing them on one another in the form of a potential relief modulated by frequency and depth. When scanning the surface of the target 7 with a reading beam on the load cell 12 connected to the collector circuit 9, signals modulated by the potential relief formed on the dielectric of the target during the recording process are extracted. The read signals are processed in the read block 13 and fed to the amplitude limiter 14 and the frequency detector 15. The read block also produces a complex damping signal, which is fed to the read modulator 10 of the SELT 6 to damp the reverse beam of the read beam. The amplitude limiter generates signals carrying information about the luminance of the generated image. Frequency detector 15 serves to demodulate frequency modulated chrominance signals and produces a discretely varying voltage, each value of which corresponds to a certain color. Voltages t //, 2, Uz correspond to primary colors, and Un,, and 5 correspond to secondary colors. To reduce color distortions caused by the phase shift of the carrier FO and the luminance signals, the output signals of the amplitude limiter 14 are fed to the frequency detector 15. The luminance signal and the chrominance signals are used to shape the full color television signal of a compatible system. The output voltage of the frequency detector 15 is supplied to the amplitude discriminator 16, which is set to three voltage levels. The first level corresponds to the signals that carry information about the red one, and the second level corresponds to the blue one. Signals that carry information about green vete and secondary colors correspond to the network level. The luminance component of the amplitude limiter 14 and the chroma signals corresponding to the third level from the amplitude crimper 16 are received during each read line to the input of the color television signal generating unit 17. The signals of the first and second levels are transmitted in alternation in rows, i.e., a chroma red signal is transmitted in one line, and a blue chroma signal is transmitted in the next line.

Block 17 receives horizontal and frame sync pulses from block 19 of a television scanner, which, by controlling the currents of the deflecting reading system 11 of the ZELT 6, turns the read beam into a television raster with standard decomposition parameters.

In block 17, color-difference signals are generated, which in turn modulate the corresponding color subcarriers. The luminance signal performs amplitude modulation of the high frequency carrier. The sync pulses of block 19, which also ensures the synchronous operation of the amplitude discriminator, are displaced to the luminous signal. The luminance signal is equivalent to a black and white television signal and is transmitted in a standard frequency band of 6.5 MHz. In block 17, a protective signal is also generated in the form of sinusopdal pulses with a frequency of color subcarriers. The chrominance and luminance signals are mixed, and the complete television signal generated in this way on a compatible system is fed to the input "Antenna of a commercially available broadcast color television 18.

On the color television screen 18, an image formed by a data input unit,

reproduced as follows. For example, the entire screen area is represented by one of the colors, and the alphanumeric, character, graphic, and other information is represented in white, or vice versa.

Subject invention

A device for displaying color information containing a color television receiver, serially connected reading unit, frequency detector, amplitude discriminator and television scanner unit, cathode ray tube (ZELT) whose collector is associated with a load element and a reader unit, and a deflection system the readout module ZELT is connected to the television scanner unit, the imaging unit is connected to the recording modulator and the deflecting system ZELT recording unit, the input unit connected to A code-color informer and an imaging unit, characterized in that, in order to enhance the quality of a color image, it comprises a frequency modulator associated with a code-color descrambler and a ZELT recording modulator, amplitude limiter coupled to the reader unit and the frequency detector and a color television signal generating unit associated with an amplitude discriminator, an amplitude limiter, a television scanner unit and a color television receiver.