SU1317688A1 - Device for reproducing television pictures - Google Patents

Abstract

The invention relates to a television technique. The purpose of the invention is. Enhance the quality of the television image. The device contains vertical buses 1, blocks 2 for sampling and storage, horizontal buses 3, a 4-line switch, power supply bus 5, field voltage bus 6, conducting substrate 7, voltage source 8, alternating voltage source 9, common bus 10 and switch 11 elements. According to the clock signal 0, the signal appears on the 1st, 2nd and subsequent outputs of the switch 11 In block 2, the values of all N are stored from 05 00 00

Description

131

 line items The flat screen consists of a glass plate on which a first conductive substrate, arranged in a continuous layer of liquid crystals, streaks of light filters, a second conductive substrate consisting of discrete elements (DE), a layer of planar microcircuits and The vertical busbar layer, the DE of the second conductive substrate, is located in the cross line x vertical. and horiz, tires. To horiz TIRS signals with

one

The invention relates to television technology and can be used in television receivers, video monitoring devices and displays.

The purpose of the invention is to increase the ca-. TV image quality.

Fig. 1 shows a structural electrical circuit of the proposed device for reproducing tele vision images; in fig. 2 is a flat screen, a fragment of the cross section; in fig. 3 - structural electrical circuit of one discrete element; in fig. 4 is a structural electrical circuit of the sample and hold unit; in fig. 5 is a structural electrical circuit of a single discrete element for reproducing a color image.

The device for reproducing television images contains vertical buses 1, blocks 2 of sampling and storage, horizontal buses 3, a 4-line switch, power bus 5, field voltage bus 6, first conductive substrate 7, power supply voltage B, alternating signal source 9 voltage, common bus 10, switch 11 elements, liquid crystal layer 12, second conductive substrate 13, planar microcircuit layer 14, layer 15 vertical bus bars 1, light filter strips 16, glass plate 17, switch 18, trigger 19.

Sampling and storage unit 2 comprises an input switch 20, triggers 21, and output switches 22.

7688

switchboard of lines, and on vertik. tires from the elements of block 2. The modulation of the light flux in accordance with the input digital video signal occurs due to the fact that in each DE the jth bit controls the transparency of the bit crystals below the segments of the second conductive substrate. The area of the segments is 2 areas of DE. The light fluxes of the segments form the light flux of this DE. 2 hp f-ly. 5 silt

The device works in the following way.

The clock signal and is fed to the input of the switch 11 elements and alternately the output signal appears on the 1st, 2nd and subsequent outputs of the switch 11. The trigger 21 of the j-ro block 2 at the moment it arrives at its input, the signal takes a state corresponding to the j-ro value of the input digital video signal. Thus, by the end of the line, the first N triggers 21 memorize: the values of all N elements of the line.

During the horizontal damping period, the input and output switches 20 and 22, controlled by the half-frequency frequency meanders U, are activated, so that the input signal switches to the second N triggers 21, and the first N triggers are connected to bus 1 during the next line. support on buses the values of logical zeros and ones accumulated in the previous line. These values from each of the buses 1 are fed to the inputs of all the flip-flops 19 connected to this bus. A 4-row switch controlled by horizontal frequency pulses U (.p and field frequency Un6A. ° alternately from top to bottom with an interval T delivers pulses of duration T, where T (is the length of the scanning line, to horizontal tires 3.

The triggers 19 of the line to which the pulse is applied, are triggered by switching to the state that corresponds to a logical zero or

unit on the vertical bus 1 (if the trigger is already in this state, then the switch does not occur). Trigger 19 may be triggered during the row. Further, the triggers 19, retain their state until the next switching, when the value of the control bit will be different.

This video signal occurs due to the fact that, in each discrete element, the jth bit controls the transparency of the liquid crystals below the segments of the second conductive P13floor 13, whose area is 2 areas of the entire discrete element, where j is the segment number. Thus, the magnitude of the luminous flux I from a given discrete element is the sum of the luminous fluxes; -

The output voltages of the flip-flops 19 Q Ir are controlled by the switches 18. In the state of flip-flop 19 Units per second wire 1th substrate 13

a voltage U is applied which, as a result of the element's luminous flux emitted by the action on layer 12, causes its blackening. The alternating voltage and is a constant voltage. every j-ro segment. When the input value

digital video signal A, A,

. , d 1J, ...

for a given discrete

them.

equal to i 1 to 51

-)

2

where a

-)

the polarity of which is relative - takes the value O or 1

but tires total changes for example 20

t

with a frequency of 50 Hz, and the scope of which

Provides full and fast blackening of liquid crystals. In this version of the screen provided the formula and. acquisitions.

1. A device for reproducing television images, the content of nematic liquid crystals, 25 is a fixed flat screen, in which a layer of working on the effect of dynamic

liquid crystals are enclosed between the first and second conductive substrates, the first of which is solid across the screen, and the second consists of discrete elements located in the cross over x N vertical and Z horizontal buses, the horizontal buses connected to the line switch outputs, and each i-vertical 35 bus, where 1, is connected to the corresponding output of the sampling and storage unit, clock inputs of the generator are connected to the corresponding outputs of the switch of elements whose input is the input of the clock signal ala elements differing in that, in order to improve the quality of the television transformation, (n-1) sampling and storage units are introduced, and (n-1) N vertical busbars, where n is the number of bits of the binary digital code video signal, with j + (i-1) vertical bus, where 1 j p is connected to the i-th output of the j-ro storage sampling block, whose input is the input of the j-ro bit of the digital video signal code, at the intersection of each vertical and horizontal bus trigger and switch, the output of which is connected to the segment of the second conductive n Overspots, whose area is equal to 2 areas of a discrete element, the first and second inputs of the switch

scattered light, but in principle a twist effect can also be used (in this case, the crossed polarizers should be introduced into the screen). After removal from the second conductive substrate 13 of the voltage U, the layer 12 of liquid crystals relaxes, restoring its transparency.

The DC voltage from the source 8 for powering the trigger 19 is supplied through buses 5, and the alternating voltage from source 9 through buses 6 located on top of the layer 15 of vertical tires 1. The triggers 19 and switches 18 are made using a planar technology and placed in a layer 14 of planar microcircuits, which is located on a second conductive substrate 13.

For reproducing a color image, rows of discrete elements are combined in groups of three lines (Fig. 5). In this case, in each group row, under the second conductive substrate 13, a stripe 16 of the corresponding primary color filter is arranged. All these layers and the liquid crystal layer 12 are located on the glass plate 17, on which the first conductor 7 is also applied, connected to the common bus 10,

Modulation of the light flux in accordance with the input digital p-bit

This video signal occurs due to the fact that in each discrete element the jth bit controls the transparency of the liquid crystals under the segments of the second conductive P9block 13, the area of which is 2 areas of the entire discrete element, where j is the segment number. Thus, the magnitude of the luminous flux I from a given discrete element is the sum of the luminous fluxes; -

element luminous flux emitted

. each j-ro segment. When the input value

digital video signal A, A,

. , d 1J, ...

for a given discrete

luminous flux, emit

I 1 51

-)

2

where a

O or 1 values

Formula and. acquisitions.

Claims (3)

1. A device for reproducing television images comprising a flat screen in which a layer 0 0 g liquid crystals are enclosed between the first and second conductive substrates, the first of which is solid across the screen, and the second consists of discrete elements located in the cross over x N vertical and Z horizontal buses, the horizontal buses connected to the line switch outputs, and each i-vertical-5 bus, where 1, is connected to the corresponding output of the sampling and storage unit, clock inputs of the terminal are connected to the corresponding outputs of the switch of elements whose input is the input of the clock signal ala elements differing in that, in order to improve the quality of the television transformation, (n-1) sampling and storage units are introduced, and (n-1) N vertical busbars, where n is the number of bits of the binary digital code video signal, with j + (i-1) vertical bus, where 1 j p is connected to the i-th output of the j-ro storage sampling block, whose input is the input of the j-ro bit of the digital video signal code, at the intersection of each vertical and horizontal bus trigger and switch, the output of which is connected to the segment of the second conductive n dlozhki, which area is equal to 2 square discrete element, the first and second inputs of switch five 0 are connected respectively to the first substrate and to the output of the alternating voltage signal source, the control inputs of the switch are connected to the corresponding trigger outputs, the information and syncing inputs of which are connected respectively to the vertical horizontal busbars. 2. The device according to claim 1, wherein the sample and storage unit comprises an input switch, 2 N flip-flops and N output switches, the outputs of which are the outputs of the sampling and storage unit, the input of the input switch is the input of the sampling unit //////// // /, // // / // // ////// / // // / / // storage, the i-th clock inputs of which are the combined clock inputs ix and (i + N) -x flip-flops, the first and second outputs of the input switch are connected to the combined inputs of the first N and second N flip-flops, respectively, and outputs i-ro and (i + N) -ro triggers are connected respectively to the first and second i-ro inputs of the output switch. 3. The device according to claim 1, characterized in that the rows of discrete elements are grouped into groups of three lines, wherein strips of filters of the main colors are applied to the discrete elements of each line in the group. 15 FIG. 2 Ugns. - g i- kg: patofff tfifoa. naea Uhom Editor T. Parfenova tfmi.S Compiled by A. Prozorovsky Tehred V. KadarKorrektor A. Obruchar Order 2437/56 Circulation 638 Subscription VNIIPI USSR State Committee for inventions and discoveries 113035, Moscow, Zh-35, Raushsk nab., 4/5 Production and printing company, Uzhgorod, st. Project, 4