How to play image flat-screen tv

 

(57) Abstract:

The method used in optoelectronic information technology. The method comprises withdrawing the light fluxes of N planar waveguides in the layer of ferroelectric liquid crystal. Each of the N converted by the conversion unit of policity light fluxes enter in the I-th planar waveguide without shell and spread light stream through total internal reflections created by the bottom and side faces of the groove matrix, which is attached to the waveguide, and the top face of the formed liquid crystal layer. To output light flux of the planar waveguide is served on the upper and lower electrodes voltage that generates an electric field with a direction perpendicular to the direction of propagation of the light flux. Injected luminous flux of the layer of liquid crystal in a cylindrical waveguides without sheath through the side faces directed perpendicular to the direction of propagation of the light flux. Choose this refractive index cylindrical waveguides, which will provide through the layer of optical adhesive and the protective plate full output of the light flux in open space. Prov.Amy way relates to the field of optoelectronic information engineering and can be used to build systems images are displayed.

Known methods of image playback screen, for example, the methods discussed in the author's certificate N 1656587 from 15.02.91 (priority 24.05.89), in U.S. patent N 5150445 from 22.09.92 and in PCT patent WO 93/09450 from 13.05.93. The method discussed in the author's certificate N 1656587 based on the use of light reflected from the boundaries of different refractive indices, the generated electric field (see Fig. 10). The nearest analogue can be attributed to the method described in patent PCT WO 93/09450 (PCT/US 91/08109) from 13.05.93.

Analogue has the following disadvantages:

1. The low efficiency of the playback image.

This is due to the output of the light flux from the waveguide through its shell and the scattering layer 21 of Fig. 8, contains minerals, which scatter light in all directions, and a large proportion of the luminous flux reflect. Such a large share of the loss of the luminous flux does not depend on how the conclusions of the light flux from the waveguide electro-optical, thermo-optical, acousto-optical and magneto-optical. With the aim of improving efficiency in the patent PCT is considering another way of output light flux through the reflective mirror of Fig. 9. However, to ensure such a conclusion Shu the proportion of the luminous flux from the waveguide, and the main share of light when it is reflected back.

It should be noted that to increase the share of output light by multiple output light from the waveguide is also impossible, as by increasing the length of the segment that outputs light waveguide, mix different signals. Thus, the output light by means of inclined mirrors Fig. 9 also has a low efficiency.

2. Small resolution of the reproduced image.

Dealt with in similar ways output light beams from the waveguide based on the multiple refraction of light at a certain segment of the waveguide. This fundamentally limits the increase in resolution, in addition, due to the low efficiency of the light output segment output light waveguide cannot be reduced more than a certain length.

The aim of the invention is to increase the efficiency and resolution of the reproduced image flat-screen TV.

To achieve the goal of the proposed method contains: process output light fluxes of N planar waveguides in the layer of ferroelectric liquid crystal, for which each of the N transformed block preobrazovannoe flow through total internal reflection, created by the bottom and side faces of the groove matrix, which is attached to the waveguide, and the top face of the formed liquid crystal layer, and to output light flux of the planar waveguide is served on the upper and lower electrodes voltage that generates an electric field with a direction perpendicular to the direction of propagation of the light flux; and the process of entering light flux from the layer of liquid crystal in a cylindrical waveguides without sheath through the side faces directed perpendicular to the direction of propagation of the light flux, while choose this refractive index cylindrical waveguides, which will provide through the layer of optical adhesive and the protective plate full output of the light flux in the open space.

Set out the essence of the illustrated variant of the method the device shown in the drawings, where:

in Fig. 1 depicts a fragment of the cross-section of the screen, containing planar waveguide without shell 1, the matrix-substrate - 2, an opaque electrode 3, a transparent electrode 4, the protective plate 5, a cylindrical waveguide without the shell 6, the layer of ferroelectric liquid crystal - 7, Fig. 1 labeled +U, -U, - ol is knogo section of the screen, showing the refraction of the light flux that contains all the same elements 1,2,3,4,5,6,7 Fig. 1 and a layer of optical adhesive 8, Fig. 2 denote: n0is the refractive index of open space, n1is the refractive index of the planar waveguide, n3is the refractive index of the substrate matrix, n4the refractive index of the ferroelectric liquid crystal without the electric field, n4the refractive index of the ferroelectric liquid crystal with an electric field, n5is the refractive index of the cylindrical waveguide without shell, n6is the refractive index of the protective plate and the optical adhesive;

Fig. 3 depicts a top view of the matrix-substrate - 9;

in Fig. 4 fragment - containing planar waveguides - 1, laid in the grooves of the matrix substrate 2 and the liquid crystal layer - 7;

in Fig. 5 depicts a bottom view of the matrix-substrate 10, which shows its fragment, containing the horizontal electrodes -

in Fig. 6 shows the protective plate 12 bonded thereto by a layer of cylindrical fibers - 13; Fig. 6 shown separately slices C and D, containing the protective plate 12 attached cylindrical waveguides without the shell 13, the horizontal e is ary waveguides - 16, flat optoelectronic screen - 17, Fig. 7 denote: X - input electrical signals.

In Fig. 8 and 9 shows the device closest analogue containing planar waveguide 18, the shell of the waveguide 19, the electrodes 20, the scattering layer 21, an optical medium with a lower refractive index - 22. In Fig. 8 and 9 indicated: ~U, +U, -U, - electrical voltage. S0- output luminous flux of the signal, Sn1- lose the dispersion of the luminous flux, Sn2- lose internal reflection of the light flux.

In Fig. 10 shows another device of similar author. testimony N 1656587 that implements the output light by an electric field formed by the voltage U, through the formation of boundaries between the different indices of refraction n1and n2and containing planar waveguide 23, a transparent electrode 24, an opaque electrode 25.

Variant of the device that implements the proposed method operates as follows.

The electrical signal X unit conversion - 15 is converted into an optical polarized policity video, which harness through the planar waveguides - 16 is fed to opto-flat panel display - 17. Optical) and the means of multiple reflections, created smaller refractive index n3substrate-matrix - 2 and n4liquid crystal 7 in comparison with the refractive index n1planar waveguide - 1.

When the supply voltage U to the electrodes 3 and 4 is formed, the electric field direction perpendicular to the direction of propagation of light waves. This dramatically increases the refractive index n'4a layer of ferroelectric liquid crystal - 7, that is, the condition n41,1 n1and instead of total internal reflection of the light flux to the supply voltage U is applied at the electrodes, which was n41,1 n1the light output is almost completely come out of the waveguide 1 in the liquid crystal layer - 7 with a small angle of refraction. Thus, post-luminous flux is served on the side cylindrical waveguides without the shell with a refractive index of n5performing the condition n5>n'4where near the opposite face of the cylindrical waveguide is provided to focus the light flux contributing to almost full output it through the layer of optical adhesive 8 and the protective plate 5 with the same low refractive index of n6wtulich flows from planar waveguides increases the efficiency and resolution of the reproduced image is many times compared to analogue.

The efficiency of the device in the implementation of the proposed method is confirmed by the results of experimental studies.

How to play image flat-screen TV, in which the injected luminous flux of the layer of ferroelectric liquid crystal and output luminous flux from him in the waveguides, characterized in that the luminous flux is introduced into the layer of ferroelectric liquid crystal of N planar waveguides with a refractive index of n1what each of N converted by the conversion unit of policity light fluxes enter the 1st planar waveguide without shell and spread light stream it via total internal reflections created by the bottom and side faces of the groove matrix, which is nested in the waveguide, and the top face formed with a layer of ferroelectric liquid crystal, and served on the upper and lower electrodes voltage that generates an electric field with a direction perpendicular to the direction of propagation of the light flux, which increases the refractive index of the layer of ferroelectric liquid crystal to a value of nn1,1 n1and the luminous flux from the layer of ferroelectric secolare to the direction of propagation of the light flux, while choosing such a refractive index cylindrical waveguides, which will provide the complete output of the light flux in open space through the side faces of cylindrical waveguides, the optical glue layer and the protective plate.

 

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