SU1368998A1 - Color television receiver - Google Patents

Description

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electrodes (SSHE) 13, coated with phosphors -14. Each SShE 13 is covered with a fluorescent paint of one carrier color and is grouped according to the number of carrier colors. The switch 8 connects the SShE 13 group corresponding to the luminous signal that enters the CRT 4 in the given line to the constant voltage source. As a result, the transparency of the film 12 in these areas increases to max, the value and the light of the kinescope screen excites the corresponding signal. Phosphor portions of 14. 1 Il, 1 tab.

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The invention relates to the field of television, in particular, to color television (TV) receivers containing multipath CRT systems, color television systems SECAM-ZB and its modifications.

A color TV receiver is known that contains a high-frequency unit, the first output of which is connected to the input of the audio accompaniment unit, the second output is connected via a scanner to the deflection input of a cathode ray tube (CRT) of the type of two-beam chromatron, the third output of the high-frequency unit is connected to the input of the block chromaticity, the three outputs of which are connected to the corresponding control electrodes of the CRT, while the second output of the scanner is connected to the control input of the switch strip lines, the outputs of which are connected to The corresponding CRT control inputs tl.

However, the well-known color TV receiver does not provide the required color purity.

The closest in technical essence is a color TV receiver containing a high-frequency unit, the first output of which is connected to the input of the soundtrack, the second output of which is connected through a scanner to the CRT deviation input of the type of two-beam chromatron, the third output of the high-frequency block is connected to the input of the unit chromaticity, the three outputs of which are connected to the three inputs of the delay unit through a switch of color signals, the first output of the rear unit; the holder is connected to the first control input of the CRT, the second output Which is connected to the third control input of a CRT, while the control inputs of the color signal switch and the dash line switch, the output of which is connected to the corresponding CRT inputs, the second scan output connected to the control input of the color block and connected to the control input switch line stripes 2.

The known device provides the full purity of the color of the reproduced image of the double-beam chromaticium while simultaneously increasing the brightness of the reproduced image.

However, this is achieved due to some complication of the electric circuit of a color TV receiver and does not lead to any simplification of the design of the kinescope - the most expensive node of a color TV receiver, which ultimately leads to an increase in its cost due to the introduction of additional nodes.

The purpose of the invention is to increase the image quality while simplifying the receiver,

In a color TV receiver containing a high-frequency unit, the first output of which is connected to the input of the soundtrack unit, the second output of which is connected through the scanner to the deviation input of the CRT, the third output of the high-frequency unit is connected to the input of the chromaticity unit, the three outputs of which are connected to the three inputs of the block delays through a color signal switch, with the first output of the delay block connected to the first control input of a CRT, the second output connected to the third control input

The CRT, while the control inputs of the color signal switch and the dash strip switch are connected to the output of a control pulse generator, whose input is connected to the fourth output of the high-frequency block and to the control input of the color block, in front of the CRT screen, made in the form of a single or multibeam kinescope, a selector of chromaticity of the reproduced lines, three control inputs of which are connected to the corresponding outputs of the switch of the dashed strips, while the selector of chromaticity of the reproduced lines is made in view of a translucent electrode connected to a common power rail in front of the CRT screen in series with a film with optoelectric properties, on which n groups of three translucent stroke electrodes are applied, respectively, with photoluminophores of three primary colors.

The drawing shows a structural electrical circuit of a color TV receiver,

The color TV receiver contains a high frequency unit 1, a sound accompaniment unit 2, a sweep unit 3, a cathode-ray tube (CRT) 4 of the single or mono-beam kinescope type

(quantoscope) t, block 5 chromaticity, switch 6 color signals, block 7 delay, switch 8 dash strips, shaper 9 control pulses, selector 10 chrominance of reproducible lines, translucent electrode 11, film 12 with optoelectric properties, three groups of translucent stroke electrodes 13, photoluminophores 14 three primary colors.

Structurally, the selector 10 chromaticity of the reproducible lines consists of a film 12 with a thickness of 0.5-0.7 mm, covered on the side facing the screen of the CRT 4, with a translucent electrode 11 and on the side facing the viewer m. - translucent stroke electrodes 13 coated with photo-luminophores 14 - fluorescent or fluorescent paints of carrier colors. Each stroke electrode 13 is painted with a single carrier color and combined into isolated from each other, according to the number of carrier colors, groups connected to the outputs of the switch 80

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The translucent electrode 11 can be made in the form of a layer of electrically conductive adhesive mechanically connecting the film 12 to the surface of the CRT screen.

The receiver works as follows.

From the first output of the high-frequency block 1, the audio subcarrier enters block 2, where it is converted into a sound signal. From the second output of the high frequency unit 1, the frequency pulses of the strings and fields are fed to the input of the sweep unit 3, from the output of which the deflection voltages are fed to the corresponding deflection inputs of the CRT 4, so that a TV-raster image is formed on its screen.

Unlike commercially available multibeam CRT 4 CRT 4s, there are no built-in focusing masks, grids and / or devices after deflecting 5 rays of electronic projectors, and its phosphor coating is uniform with a monochromatic (blue or purple) luminescence color and an afterglow time not exceeding flyback time. Therefore, despite the fact that in each successive period of the unfolded line on the screen of the kinescope, the acoustical information about the differences in the primary colors is displayed, all the primary colors are reproduced in one, for example, purple. At the same time, direct observation of the image reproduced on the screen of a CRT 4 is difficult due to the stroboscopic effect of the demonstration due to the short afterglow time of the screen of the CRT 4 and distortions of the overall acoustical picture of the image reproduced in monochromatic light.

From the third output of the high-frequency block 1, the bright-tone TV signal is fed to the input of the chromaticity block 5, where it is converted into simultaneous color signals of green (3), red (K) and blue (C) (M 1-3 tables) using clock pulses. At the same time, the sync pulses from the fourth output of the high-frequency unit 1 are fed to the input of the driver 9 of the control pulses, which is an annular pulse distributor. The output of the former 9 is connected g

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the control inputs of the switch 6 color signals, the input of which receives simultaneous signals of primary colors, and the output is connected to the delay unit 7. The latter delays the signals of the primary colors for a time equal to the duration of one and / or two lines.

Switch 6 and block 7 depending on the type of CRT A used (two-beam or three-beam) temporarily shifts the signals of the primary colors (No. 4-5 of the table - for a two-beam kinescope, No. 6-8 of the table - for a three-beam kinescope).

On the outputs of block 7, the signals of the primary colors are delayed in such a way that in each of the unfolded lines there are signals of only one primary color, but from several adjacent lines. These signals are fed to the control inputs of a CRT 4 multipath kinescope and modulate the current of the beams of electronic projectors of the kinescope.

Simultaneously and synchronously from the beginning of the lines, switch 8 connects groups of translucent stroke electrodes 13, covered with photoluminophores 14 with fluorescent or fluorescent paints of that primary color, the bulky signals of which are received in this line from block 7 to the multi-beam control CRT 4 inputs

2.5-4.2 V. This leads to the polarization of the areas of the film 12 between the respective translucent stroke electrodes 13 and the transparent electrode 11 and an increase in the transparency of the film 12 in these areas to a maximum value.

As a result, the light emitted by the demonstration screen of the kinescope penetrates through the transparent areas of the film 1 2 and excites the rectangular parts of the photoluminescent phosphors 14 whose width is equal to the width of the translucent stroke electrodes 13 and the height is equal to the diameter of the beams of electronic projectors. The total number of sections illuminated when scanning one line is equal to the product of the number of electrodes of the corresponding color and the number of electronic searchlights in the kinescope. Since the afterglow time of the photoluminescent phosphors 14 is not less than

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Once the half-frame is scanned, the excited areas of the photoluminescent phosphors 14 continue to shine even after the glow of the phosphor of the CRT 4 coating is finished, which excludes the appearance of the strobic effect.

During the next horizontal scan period, signals of a different primary color are reproduced on the CRT 4 screen. Moreover, since the scanning unit 3, the rays of the electronic projectors of the CRT 4 will be shifted in the frame direction by one line, and in each 5th row of the raster several lines unfold simultaneously depending on the number of electronic projectors of the CRT 4, several rays of

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The sections of the phosphor coating of the CRT 4, already illuminated in the previous line, are already walking. However, the exposure of the previously illuminated sections of photophosphors 14 does not occur again, because switch 8 switches the corresponding group of translucent stroke electrodes 14 directly at the beginning of each next horizontal scanning period. The transparency windows are displaced in the ferroelectric ceramic plate 12 under the group of translucent stroke electrodes 13 with a different color of the photoluminophores 14 and the expandable group rows and reproduced in a different color.

After successive passage through this portion of the phosphor coating of the CRT screen 4, all the beams of electronic projectors (for a three-beam kinescope, after three beams have passed through one spot, i.e. after three horizontal scanning periods), a colored light is displayed on the photoluminophore 14 at the corresponding raster height. the image of this line, and when passing by electronic spotlights CRT 4 of the entire raster, the full color image of the reproduced half-frame is displayed, after which the next half-frame is scanned, etc.

The most complex three-beam version of the device is considered. The two-beam and single-beam versions of the device are obtained by excluding one or two channels of transmitting signals of the primary colors from the output of the switch 6 color signals to the control inputs of the CRT 4, eliminating one or two delay lines in block 7.

The resolution of the single-case variant of the device (without additional delay lines) is 20 i lines for each of the main two i. The resolution of the two-way VO variant of the device (when using 30 1 in block 7, one delay line for 2 horizontal scanning periods) with 625 lines in a frame by one main color (green) and 312 St -UK in a frame for each of the two remaining primary colors. The resolution of the SP (the capacity of the three-beam version of the device (when using lines for,, holders for one and two periods of the line: sweep) is 625 lines in the address for each of the main colors.

Due to the introduction of a commutator of DV signals, delay blocks, a KO1 mutator of dashed bands, a form: control signal pulse and a village: torus of reproducible lines, the invention has the following advantages Bai and compared to the mass-produced color TV receivers.

1. Use as output but about cascade color TV receiver

of a white-white kinescope with a corresponding decrease in size, weight, rebreathed power, supply voltage, while reducing the cost of the ESI in comparison with the mask by 5–4.7 times.

2. Additional claims are excluded; The display of luminance color information in the produced image is brought in by electric fields and electrical components (WATER surfaces focusing masks, grids and / or elements after deflection.

3. The rendering quality of the reproduced image increases by

Wed with mass production. with color TV receivers. Not less than fold due to a more complete use of current of electron beam current tori.

4. Energy costs for chromatic reproduction of reproducible

st ok are reduced by 70-100 times.

5. Energy costs for reproduction (production of black and white images

practically equal to the energy costs of reproducing black-and-white images on CRT screens of monochromatic black-and-white TV receivers and 9-10 times lower (when reproducing images of the same brightness) energy costs in commercially available color TV receivers.

Claims (1)

Invention Formula A color television receiver containing a high-frequency unit, the first OUTPUT- of which is connected to the input of the soundtrack unit, the second output of which is connected through the scanner to the deviation input of the cathode ray tube (CRT), the third output of the high-frequency block connected to the input of the chromaticity unit, the three outputs of which connected to the three inputs of the delay unit through a color signal switch, the first output of the delay unit connected to the first CRT control input, the second output connected to the third EL control input T, while the control inputs of the color signal switch and the dash strip switch are connected to the output of the control pulse generator, the input of which is connected to the fourth output of the high-frequency block and the control input of the color block, characterized in that, in order to improve the image quality while simplifying the receiver, In front of the CRT screen, made in the form of a single or multibeam kinescope, a color selector of reproducible lines is introduced, three control inputs of which are connected to the corresponding output Odes of the dashboard switch, with the selector of the color of the reproduced lines made as a sequence and t parallel in front a CRT screen of a translucent electrode connected to a common power line, and a film with optoelectric properties, on which n groups of three translucent stroke electrodes are applied, respectively, with photoluminophores of three primary colors.