SU457188A1 - The device to play the image - Google Patents

Description

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This invention relates to the field of radio engineering. The device is intended to reproduce television images.

A device for reproducing an image, for example, on an electroluminescent screen, is known, which contains a scanning device and a television receiver. Such a device is difficult.

For the sake of simplicity, a device for converting the amplitude of a video signal into a digital code is introduced into the device being described.

The drawing shows a block diagram of the described device.

The device comprises a screen 1, a television receiver 2, a sweep device 3; Converter 4 amplitudes of the video signal into a digital code consisting of a generator of 5 clock pulses, an encoder of 6 amplitudes, counter 7, multiply: an IT device 8, which includes 9-15 "And circuits 16, 17 and 18" IE and a circuit 19 and the generator 20 pulses set the counter.

The receiver produces sync pulses that control the sweep device. The sweep device selects the elements of the scrap along the inputs of the screen sweep and connects to it the excitation pulses to the input of the brightness control. The presence or absence of pulses at the screen input is determined by an amplitude transducer.

video signal to code depending on the amplitude of the video signal at the receiver output and presetting the phase of the counter with pulses from the generator 20. Presetting the phase of the counter determines the temporal position of the pulses at the output of the converter relative to the previous setting. Each new temporary position of the pulses shifts the excited elements of the screen, i.e. it forms its own field, the number of which is determined by the capacity of the counter. When changing zeros, the elements are interleaved.

The formation of excitation pulses of the screen elements for two interlacing fields at the amplitude of the video signal corresponding to the 10th tradition of brightness, occurs as follows. The video amplitude encoder generates code 1010. When the counter is set to 0th phase (code 0000), the output of the converter produces zero field excitation pulses. When the phase of the counter is set to the 1st phase (code 0001), excitation pulses of the nerve field are generated. The counter code is transformed into “pulse sequences” by the “NOT and” circuits, and 9, 10, and 11, to the circuits 12-15, and where the logical multiplication with the video signal code occurs. After combining with the "OR" scheme, a (unitary) code is generated, which is fed to the screen brightness control input. From line to line and from frame to frame, generator 20 sets the counter to a new phase. There is a field change in which the included elements change their position on the screen - the interleaving of the elements of the image. In this case, the brightness of individual sections of the image is proportional to the amplitude of the video signal.

For a four-bit counter, sixteen different settings are possible from a pulse generator. In this case, sixteen interleaving fields are possible. In each field, the temporal position of the pulses is different.

The law of interleaving (changing fields) can be chosen well-defined (either random or pseudo-random) and is determined by the construction of the setup pulse generator circuit.

Subject invention

A device for reproducing an image, for example, on an electroluminescent screen, comprising a sweep device and a television receiver, characterized in that, for the sake of simplicity, a video signal amplitude conversion unit is inserted into a digital code consisting of an encoder.

amplitudes of the video signal, multiplier, counter, clock generator and pulse generator of the counter installation, with one of the encoder's inputs connected to the clock generator, its outputs

they are connected to the logic circuits of the ITEL, and the additional logic circuits of the multiplier are fed to the output of the counter, the inputs of which are respectively connected to the outputs of the clock generator and the generator of the meter installation of the counter.

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