RU2624775C1 - Television system - Google Patents

Abstract

FIELD: physics.

SUBSTANCE: for each horizontal row of photosensitive elements of the matrix image sensor, three vertical strip filters of red, green and blue alternating in the vertical direction are applied. Between multiphase generator and binary counter added three frequency divider, and between the lens and the mirror the rotating bezel with optical filters red, green, and blue is installed. Thanks to the use of the three-field decomposition regime and rotating filters, which ensure that the converter is illuminated in the first field through the red filter, in the second field through the green filter and in the third field through the blue filter, the number of vertical samples increases threefold. In this case, the image of the first field that has passed through the rotating red filter comes to the accumulation elements through the horizontal red filters, the image of the second field that has passed through the rotating filter of green goes to the accumulation elements through the horizontal filters of green colour, and the image of the third field that has passed through a rotating light filter of blue colour, enters the accumulation elements through horizontal colour filters of blue colour.

EFFECT: increasing the resolution of the television system with discrete image converter.

2 dwg

Description

The invention relates to television technology and is intended to increase the resolution of a television system with a discrete image converter.

Known transmitting television camera RU 1252952 H04N 5/225.

The reasons that impede the achievement of the required technical result when using the known system include the fact that to increase the resolution it is necessary to use a complex optical system with polarizers that significantly weaken the luminous flux and thereby reduce the sensitivity of the television camera.

Closest to the proposed invention in technical essence and in the totality of features is a television system, made according to the author's certificate of the USSR No. 1125779, class. H04N 7/18, H04N 3/14, 1982. This system includes a lens, a master oscillator, a multiphase generator (MFG), a matrix imager of the image signal (MFSI), a video amplifier, a key, a video monitoring device (VKU), a device for deflecting the light flux including a flat optical mirror mounted on a plate, a binary counter (DS), a shift register, a frequency divider, a digital-to-analog converter and a multiplexer. In the prototype, the resolution is increased due to the optical shift of the image projected onto the converter.

The disadvantage of the prototype is that the resolution in the prototype is increased only in one horizontal direction by using a complex optical system that provides a shift in this direction of the image projected onto the converter. However, increasing the resolution of the TV system in one direction is clearly not enough, it is necessary to increase the resolution in the vertical direction.

The problem to which the invention is directed, is to increase the resolution of the television system (prototype) in the vertical direction without optical shift projected onto a discrete image converter.

The specified technical result in the implementation of the invention is achieved by the fact that in the known system, including a lens, a generator, a multiphase generator (MFG), a matrix imager of the image signal (IFSI), a video amplifier, a key, a video monitoring device (VKU), a device for deflecting the light flux, including a flat optical mirror mounted on a plate, a binary counter (DS), a shift register, a frequency divider, a digital-to-analog converter and a multiplexer, for each horizontal row are photosensitive x generator matrix elements of the image signal are plotted in the vertical direction alternating horizontal stripe color filters of red, green and blue is set between a frequency divider and FIG DS, and between the lens and the mirror - the rotary disk filters with red, green and blue.

The analysis of the prior art by the applicant, including a search by patent and scientific and technical sources of information, made it possible to establish that the applicant did not find an analogue characterized by features identical to all the essential features of the claimed invention, and the definition of the prototype identified among the identified analogues as the closest in combination of features , allowed to determine the set of essential in relation to the technical result of the features in the claimed object set forth in the claims.

Therefore, the claimed invention meets the requirement of "novelty."

To verify the conformity of the claimed invention to the requirements of the inventive step, the applicant conducted an additional search for known solutions in order to identify features that match the features that are distinctive from the prototype, the results of which showed that the claimed invention does not explicitly follow from the prior art, since the prior art defined by the applicant, the effect of the transformations provided for by the essential features of the claimed invention on the achievement of technical result.

Therefore, the claimed invention meets the requirement of "inventive step" under applicable law.

In the drawing of FIG. 1 is a structural mixed diagram of a television system, and in the drawing of FIG. 2 - the location of the color strip light filters relative to the photosensitive elements of the matrix imager of the image signal.

The television system includes a lens 1, a driving oscillator 2, a multiphase generator (MFG) 3, a matrix imager (IFS) 4, a video amplifier 5, a key 6, a video monitoring device (VKU) 7, a device for deflecting the light flux, including a flat optical mirror 8, mounted on the plate 9, a binary counter (DS) 10, a shift register 11, a frequency divider 12, a digital-to-analog converter 13 and a multiplexer 14, horizontal striped red, green and blue color filters alternating in the vertical direction ov 15, a frequency divider 16, a rotating disk 17 with filters of red, green and blue.

Consider the work of the proposed TV system for the case of a three-fold increase in vertical resolution compared to the prototype. In this case, a three-floor decomposition is applied in the television system. Those. a vertical raster is formed over three television fields and thus the number of vertical lines is three times larger than in the prototype.

In the first field, the image on IFS 4 is projected through the red filter of the rotating disk 17 and enters the photosensitive elements through the red strip filter and is displayed on the monitor with the lines of the first field.

In the second field, the image on IFS 4 is projected through the green filter of the rotating disk 17 and enters the photosensitive elements through the green strip filter and is displayed on the monitor with the lines of the second field.

In the third field, the image on IFS 4 is projected through the blue filter of the rotating disk 17 and enters the photosensitive elements through the blue strip filter and is displayed on the monitor with the lines of the third field. Then, over the next three fields, the process of forming and displaying rows vertically is repeated. The formation of horizontal image elements repeats the work of the prototype, except that the horizontal image shift relative to IFS does not occur horizontally in each field, but every three fields, for which the frequency divider 16 is introduced into the prototype between MFG 3 and counter 10.

Consider the work of the proposed system in more detail.

The master oscillator 2 generates a continuous sequence of rectangular pulses with a frequency that is N times higher than the readout frequency of the photosensitive cells MPSI 4. This signal is fed to the input of the N-bit shift register 11, the outputs of which are connected to the information inputs of the multiplexer 14, and through the divider 12 to input of multiphase generator 3. Generator 3 generates shear pulses for reading information from IFS 4, as well as field frequency pulses arriving at the input of a frequency divider 16 into three, from the output of which the pulses are fed to the input of the binary counter 10, the outputs of which produce a control signal for the device deviation of the light flux in binary code. The digital-to-analog converter 13 converts the binary code into an analog signal, the voltage value of which is proportional to the frame number (the number of every third field) in which the decomposition is performed. The voltage from the output of the digital-analog converter 13 is supplied to the metallized faces of the piezoceramic plate 9, causing changes in its linear dimensions in proportion to the applied voltage. Since the mirror 8 is mounted on the plate 10, a change in the linear dimensions of the plate causes a corresponding movement of the mirror and a deviation proportional to this movement of the light flux incident on the IFS 4. Thus, the image of the object projected onto the photosensitive surface of the IFS will be displaced on this surface every Three fields along the horizontal direction. At the same time, thanks to color coding and a three-field decomposition process, during each three fields, the image will receive three times more vertical readings compared to the prototype.

The video signal from the output of IFES 4 in the form of a sequence of pulses corresponding to individual elements of the image projected in each of the three fields is fed to the input of video amplifier 5. It processes and amplifies the signal. From the output of the video amplifier 5, the video signal is supplied to a key 6, to the control input of which pulses are sent from the output of the multiplexer 14. The information inputs of the latter receive a signal in the form of a binary code from the output of the binary counter 10. At the same time, pulses are formed at the output of the multiplexer 14, changing their position to time every three fields relative to the pulses of the video signal and then using the key 6, the signal is gated by these pulses. Thus, at the output of the key 6, the video signals every three fields corresponding to certain positions of the image relative to IFS 4, are shifted in time. Then this signal is fed to the input of the VKU 7.

Due to the time division, the information of each of N multiplied by 3 fields occupies its specific position on the VKU 7 screen, and thus the complete image formed on the screen turns out to be composed of N multiplied by 3 images. In other words, the resolution of the proposed system is three times higher than the resolution of the prototype due to a three-fold increase in the number of lines of decomposition.

It should be noted that the increase in vertical resolution occurs due to the use of color coding, therefore, the proposed system provides a triple gain only for black and white images, when the observed objects reflect the entire spectral composition of the light incident on them. For colored objects, the gain in resolution will be less.

Thus, the above information indicates the fulfillment of the following conditions when using the claimed invention:

- a tool embodying the claimed invention in its implementation, is intended for use in industry, namely in television technology;

- for the claimed invention in the form described in the claims, the possibility of its implementation using the methods and methods described above or known prior to the priority date is confirmed;

- a tool embodying the claimed invention in its implementation, is able to ensure the achievement of the specified technical result.

Therefore, the claimed invention meets the requirement of "industrial applicability" under applicable law.

Claims (1)

A television system containing a lens, a master oscillator, a multiphase oscillator (MFG), an image signal imaging sensor (MIFI), a video amplifier, a key, a video monitoring device (VKU), a light deviation device that includes a flat optical mirror mounted on a plate, a binary counter ( DS), a shift register, a frequency divider, a digital-to-analog converter and a multiplexer, characterized in that horizontal stripes of red, alternating vertical filters are introduced into it, of yellow and blue color deposited on each horizontal row of photosensitive elements of the matrix imager, the frequency divider located between the multiphase generator and the binary counter, and between the lens and the mirror there is a rotating disk with red, green and blue filters.

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