SU873461A1 - Image reproducing device - Google Patents

Description

(54) REPRODUCTION DEVICE IMAGES

The invention relates to television and can be used in reproducing devices, television receivers on PIP plasma display panels for reproducing a semi-new television image during line-by-frame decomposition. An image reproducing device is known, which contains a plasma display panel, whose coordinate buses are connected to the outputs of electronic summing keys vertical and horizontal buses, the summing inputs of which are connected to the output of the generator supporting, firing and damping pulses, a video signal and sync pulse sensor. The first and second outputs of which are connected to the inputs of the address-scanning blocks by the X and Y coordinates, and the third output is connected to the input of the multichannel transducer of the amplitude of the video signal in the time interval. The device performs the reproduction of halftone television shows by the scientific research institute by simultaneous recording of information (ignition) into the selected line at the same time and erasing one-name. However, the known device has low quality & ratios and low reliability due to the increased requirements for the electrical characteristics of the PIT and summing 3electron keys for video signal sampling rate. The aim of the invention is to improve the image quality. The goal is achieved by the fact that the image reproducing device, a sueshering plasma display panel, whose coordinate buses are connected to the outputs of electronic keys of vertical and horizontal buses, the summing inputs of which are connected to the generator output of supporting, firing and damping pulses, is a video signal sensor and clock pulses. and the second outputs of which are connected to the inputs of the address-scanning blocks by the coordinates X and Y, and the third output - to the input of the multichannel converter g video signals in time interval; 1, a code converter, a code adder and a code comparison block were entered, while the output is address-scanned

the X coordinate unit is connected to the input converter of the code converter and the code comparison unit, the output of the scanning unit on the Y coordinate is connected to the first input of the code adder, the second input of which is connected to the output of the code converter, and the output with the address inputs of the multichannel amplitude converter of the video signal in the time interval and control input (y and electronic summation keys of horizontal buses, with the second inputs of the code comparison unit connected to the outputs of the multichannel amplitude converter in the time domain nterval, and outputs to the control input of the electronic summarizing key vertical busbars.

Figure 1 presents the scheme of the proposed device} figure 2 is a time diagram of the operation of the device.

The image reproducing device contains PIP 1, electronic summation keys of vertical 2 and horizontal 3 buses, generator 4 of supporting, firing and extinguishing pulses sensor 5 of video signal and sync pulses, address-scanning blocks 6 and 7 by coordinates X and Y respectively, multichannel converter 8 the amplitude of the video signal in the time interval, the code converter 9, the adder codes 10, block 11 comparison codes. Multichannel converter 8 amplitude of the video signal in the time interval contains the encoder 12 of the video signal, shift registers 13, random access memory (RAM) 14..

The image playback device operates in the following manner.

The sensor 5 of the video signal and sync pulses produces video signals (FIG. 2a) and horizontal pulses (FIG. 2 and frame {FIG. 26) synchronization. The address-scanning unit 6 along the X coordinate generates line scan codes (Fig. 21) during the forward course of the line scan. The address scanner unit 7, along the y coordinate, generates vertical scanning codes (Fig. 2a) during the forward course of vertical scanning.

The synchronization of the operation of the scanning unit 6 and 7 is carried out by pulses of the horizontal and vertical synchronization of the video signal sensor and the sync pulses, respectively.

The video signal from the output of the video signal sensor 5 and synchronization is supplied to the multichannel video signal amplitude converter 8 in the time interval in which it is encoded with the video signal encoder 12, accumulated in the shift registers 13 of each code bit and in parallel recorded in RAM 14 per frame from one frame. Each picture element on the PIP

in RAM 14, there are corresponding cells of memory, forming groups of cells, rows and rows of cells. When writing the code information to the selected line of RAM 14, the cells of the corresponding line of the PIU 1 are simultaneously ignited, and all the cells are ignited except for those that have a zero gradation of brightness. Selection of a line in RAM 14 and PIT 1 is carried out in parallel with codes, address-scanning unit 7 according to coordinate Y. When recording from the output of address-scanning unit 7, line codes are received through adder code 10 to address buses of RAM. 14 transducer 8 amplitude. the video signal in the time interval and the control inputs of the electrone of the summing keys of the horizontal 3 bus At the time of recording information at the output of the code converter 9, the codes are zero, and therefore the codes at the output of the adder 10 codes are equal to the codes of the scanning unit 7 according to the coordinate Y. Thus, video signal codes in the selected line in the RAM 14 of the video signal amplitude converter 8 in the time interval, and the selected line of the PIT 1 is ignited by the pulses of the ignition (figure 2) arriving at the selected horizontal bus through electronic summing keys horizontal 3 tires from the generator 4 supporting igniting and pulses. The same codes of the video signal line at the time of recording in the converter 8 the amplitude of the video signal in the time interval appears on. his exits. These codes arrive at the second inputs of the code comparison unit 11, the first inputs of which receive zero codes from the addressable scanner unit in the U coordinate. At the outputs of the code comparison unit 11 (Fig. 2e), the pulses appear only on those bits where Codes are zero These pulses on the control inputs of the electronic summing keys of the vertical 2 tires turn on damping X-pulses. (Fig. 2) supporting, firing and damping pulses on the selected vertical tires. Cells located at the intersection of the selected horizontal and selected vertical tires PIP 1, turn off. These h; eiki have a zero gradation of brightness.

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Claims (1)

1. USSR author's certificate No. 459775, cl. G 06 F 3/14, G 06 K 15/18, 1979.