System of liquid crystal display highlight and display that contains it

FIELD: physics, optics.

SUBSTANCE: invention is related to the field of optics and facilities of information displaying, and may be used for highlight of colour liquid-crystal (LC) displays and creation of LC displays that do not contain matrix of colour filters. In matrix LC display and its highlight system, which contains the following serially installed components: one or more light sources, light-conducting layer, array of light-outputting elements, fiber-optic plate installed between array of light-outputting elements and LC display, foresaid fiber-optic plate represents matrix of elements made with the possibility of light source radiation spectrum transformation into radiation with wave length that corresponds to colour formed by subpixel of liquid crystal display, at that size and location of mentioned elements correspond to size and location of liquid crystal display subpixels, at that the first line of matrix of elements that transform wave length, is installed opposite to the first line of liquid crystal display, the second line of matrix of elements that transform wave length, is located opposite to the second matrix of liquid crystal display, n line of matrix of elements that transform wave length is installed opposite to n line of liquid crystal display matrix, at that every element of foresaid fiber-optic plate contains at least one photon-crystalline fiber, which transforms wave length, at that mentioned fibers are tightly packed and completely fill area of mentioned element, at that photon-crystalline fiber includes set of fibers with hollow core that are installed lengthwise around hollow or solid wave conductor area, at that fibers with hollow core are installed so that create two-dimensional photon crystal with photon prohibited zone, at that mentioned hollow or solid wave conducting area is formed to transmit signal with frequency that lies mostly inside photon prohibited area, so that light source radiation spectrum is transformed into radiation with length of wave that corresponds to colour formed by subpixel of liquid crystal display.

EFFECT: creation of LC display highlight system with improved efficiency of light source radiation application and application of radiation source of only one type, and also creation of LC display with high transmission, in which suggested highlight system is used.

9 cl, 10 dwg

 

The invention relates to the field of optics and information display means and can be used to illuminate the color liquid crystal display (LCD) displays and the creation of LCD displays that do not contain a matrix of color filters.

Known typical matrix liquid crystal display contains the following elements:

the first polarizer,

optical compensators, increasing image contrast in a wide range of viewing angles,

the liquid crystal panel,

the second polarizer,

the lighting system,

the protective film located on both sides of the display.

Usually LCD panel includes color filters for forming a color image.

A typical system of the LCD backlight includes light sources and the light guide plate. In General, the device of the backlight of the LCD display operates as follows: light from the light source enters the light guide plate, which ensures uniformity of illumination and the limitation of the angular aperture of the light, and after passing through the light guide plate, light is projected onto the surface of the LCD panel. The light guide plate generally includes a light guide layer and located on the light guiding optical elements. Uniformity of illumination and the limitation of the angular aperture of the light receiving accounts for the corresponding geometry and location of the light guide layer and the light guiding elements.

Known illumination system (see U.S. patent No. 7,030,943 [1]), which includes the LCD panel, the housing and the optical film. The case contains a panel and a set of lamps that illuminate the LCD panel. The optical film is fixed in the slots of the housing. The disadvantage of this system is the use of multiple types of the light source in the backlight and the light absorption in the matrix of color filters of the LCD panel.

In published application for a patent of the Russian Federation No. 2006132470 [2] described the system of the LCD backlight, which includes at least one radiation source, the light guide layer and the array of light guiding elements arranged on the light guide layer, and the light guide layer and the light guiding element is made of optically transparent material. Such illumination is called the end.

In another published application for a patent of the Russian Federation No. 2006114043 [3] described the lens of the led and the dynamic system of the LCD backlight using LEDs, which includes a number of LEDs, the same number of lenses of the special forms on top of the LEDs, the optical film, the illuminated surface. The lens is attached to the led provides a redistribution of light from the light source to the area of desired shape, size and location uniformly over the specified area. The lens has a multi-faceted surface, and each face Pereyra AET rays from the light source to a specific part of the specified area. Such illumination is called direct backlight type.

In [2] and [3] use the LEDs of the three primary colors. Their radiation is mixed in the light guide plate or film to obtain a uniform light output of the illumination system. This leads to the complication of the optical system and further to absorb about 70% of the light in the matrix of color filters of the LCD panel.

In a number of technical solutions for LCD backlight use of fiber-optic elements.

In U.S. patent No. 5,042,892 [4] described svetoizluchateli panel formed by a single layer of parallel contacting the optical fiber with a light source at one end of the panel.

Closest to the claimed invention, the illumination system is described in U.S. patent No. 6,104,371 [5] modular bright fiber optic color lights for color display, in which light is distributed to the display through the end faces of the optical fibers. Optical fiber arranged in the device channels, and each channel contains a number of optical fibers. Each of the individual channels are separated by insulators and each channel carries radiation predominantly one color.

The main disadvantage of such systems [4] and [5] illumination with fiber optic elements is the need to use too many light sources of the different colors of the radiation.

Closest to the claimed invention of the LCD display backlight system is the system described in U.S. patent No. 20070182887 [6], which discloses an illumination device used for color LCD display. Red, green and blue light generated by red, green and blue LEDs, respectively, are mixed to produce white light. Range red radiation has a full width at half maximum HWRs in the rangeRange of green radiation has a full width at half maximum HWRs in the rangeRange of blue light has a width of hwr in the rangeColor LCD display, working in the lumen is illuminated by a beam of white light from the back side. Color LCD display, working in the lumen contains a tri-color filter for selection of the wavelength and transmittance of the red, green and blue, respectively.

The disadvantage of the prototype [6] is the need to use multiple types of light sources in the illumination system and the absorption of light in the matrix of color filters.

The objective of the invention is to provide a backlight LCD display with improved efficiency of use of light sources and the use of a radiation source of only one type, and the creation LCD display with high transmittance, which used the Xia proposed lighting system. Thus, the task is complex, and its decision must be based on the same technical idea.

The problem is solved by creating the illumination system matrix liquid crystal display containing consistently located

one or more light sources, i.e. at least one light source,

the light guide layer,

an array of light guiding elements,

fiber-optic plate, located between the array of light guiding elements and liquid crystal display,

thus the distinguishing characteristic of the proposed system is that called a fiber-optic plate is a matrix of elements, made with the possibility of conversion of the emission spectrum of the light source radiation with a wavelength corresponding to the color generated by the subpixel in the liquid crystal display, and the size and location of these elements correspond to the size and location of sub-pixels of the liquid crystal display, and the first row of the matrix elements, converts the wavelength, is located in front of the first row of the matrix liquid crystal display, the second row of the matrix elements, converts the wavelength, is located opposite the second row of the matrix liquid crystal l is splay, n-th row of the matrix elements, converts the wavelength, is located opposite the n-th row of the matrix liquid crystal display, each element is called a fiber-optic plate contains at least one photonic crystal fiber, converts the wavelength, and named the fibers are tightly Packed and completely fill the area named member, photonic crystal fiber includes a set of fibers with a hollow core arranged longitudinally around a hollow or solid waveguide region, and fiber with a hollow core are arranged so that they form a two-dimensional photonic crystal with a photonic gap while called hollow or solid waveguide region is formed so that the skip signal with a frequency that lies mostly within the photonic bandgap, so that conversion of the emission spectrum of the light source radiation with a wavelength corresponding to the color generated by the subpixel LCD display.

The second part of the complex problems solved by creating a matrix liquid crystal display with a lighting system that contains consistently located

the first polarizer,

optical compensators to increase the contras who and images in a wide range of viewing angles,

the liquid crystal panel,

the second polarizer,

the lighting system,

the protective film located on both sides of the display,

in which the liquid crystal panel contains

two substrates with a system of curved electrodes and control elements and circuits on the inner surfaces of these substrates,

two passivating layer deposited on the inner surface of these electrodes

two orienting layer deposited on the inner surface called passivating layers

a liquid crystal layer between the two called the substrate with the aforementioned functional layers on their inner surfaces,

the spacers between the two substrates,

in which the illumination system contains consistently located one or more sources of light,

the light guide layer,

an array of light guiding elements,

fiber-optic plate, located between the array of light guiding elements and liquid crystal panel

when this fiber-optic plate is a matrix element that converts radiation spectrum of the light source in radiation, characterized by at least three wavelengths,

moreover, the size and location of these elements correspond to the size and location of sub-pixels W is cocrystallization display

the first row of the matrix elements, converts the wavelength, is located in front of the first row of the matrix liquid crystal display,

the second row of the matrix elements, converts the wavelength, is located opposite the second row of the matrix liquid crystal display and so on (i.e. the n-th row of the matrix elements, converts the wavelength, is located opposite the n-th row of the matrix liquid crystal display),

each element is called a fiber-optic plate contains one or more photonic crystal fiber, converts the wavelength, and these fibers are tightly Packed and completely fill the area of the named element

this photonic crystal fiber includes a set of fibers with a hollow core arranged longitudinally around a hollow or solid waveguide region,

moreover, fibers with a hollow core are arranged so that they form a two-dimensional photonic crystal with a photonic gap,

it called hollow or solid waveguide region is formed to skip frequency signal lying mostly within the photonic bandgap, so that conversion of the emission spectrum of the light source in the radiation length in the us, the corresponding color subpixel in the liquid crystal display,

thus the distinguishing features of the proposed display is that the matrix system named curly electrodes of the liquid crystal panel forms a pixel of the image formed by the display, and each pixel contains at least three subpixel, which under the action of applied electronic signal modulated by the orientation of the liquid crystal in at least three spectral bands provided by the illumination system,

this color image in the visible spectrum is formed on the display screen using the converted light beams and modulating liquid crystal.

The problem is solved by creating this design of display in which the color sub-pixels is formed color filters of at least three colors, with each element of the fiber-optic plate performs conversion of the emission spectrum of the light source emission spectrum corresponding to the bandwidth of the color filter, which is located in front of the subpixel matrix liquid crystal panel.

The problem is solved by creating this design of display, in which between the fiber-optic plate and the light guiding array of elements stored is placed microlensing array.

The problem is solved by creating this design of display, in which between the fiber-optic plate and a matrix liquid crystal panel placed microlensing array.

The problem is solved by creating this design of display, in which between the fiber-optic plate and the array of light guiding elements placed microlensing array.

The problem is solved by creating this design of display, in which one or more light sources are located on the ends of the light guide layer.

The problem is solved by creating this design of display, in which one or more light sources placed from the rear toward the liquid crystal panel side light guide layer.

The problem is solved by creating this design of display, in which one or more light sources have a wide range of radiation.

The technical result of the claimed invention is to increase the efficiency of use of light sources and the use of only one type of radiation source, and increasing the transmittance of the LCD display through the use of the proposed lighting system.

For a better understanding of the present invention the following is detailed described the e with the corresponding drawings.

Figure 1 Diagram of the illumination system (side view), made according to the invention.

101 - LCD panel (shows only the substrate and the sub-pixels);

102 - the sub-pixels of the LCD panel, which is formed or is modulated color (for example, 102' - red, 102 green, 102"' - blue);

103 - fiber-optic plate, consisting of elements which are responsible for the transformation of the spectrum (for example, 103' - red, 103 green, 103"' - blue);

104 - the array of light guiding elements;

105 - light guide layer;

106 - light sources.

2 is a Mutual arrangement of the elements which are responsible for the transformation of the spectrum (for example, 203' red, 203 green, 203"' - blue), relative to the sub-pixels of the LCD panel, in which is formed a color (e.g., 202' red, 202 green, 202"' - blue).

Figure 3 the structure of the fiber-optic plate: 303' - photonic crystal fiber, converts the spectrum of the light source into red, 303" - " photonic crystal fiber, converts the spectrum of the light source in the green color, 303"' - photonic crystal fiber, converts the spectrum of the light source in the blue color.

Figure 4 Examples of photonic crystal fibers with hollow (4.1) or solid (4.2) of the waveguide region.

Figure 5 transmission Spectra of photonic crystal fibers with the transmission is in the red, green and blue bands and metal-halogen lamp at the entrance.

6, the pixel Structure of the LCD display with backlight (side view), made according to the invention.

601 - the first polarizer;

602 - optical compensators;

603', 603" - protective film;

604', 604" two substrates;

605 - system shaped electrodes on the substrate 604' (directed parallel to the plane of the figure);

606', 606" - two passivating layer;

607', 607" - two orienting layer;

608 - layer liquid crystal;

609 - spacers;

610', 610", 610"' - shaped electrodes on the substrate 604" (directed perpendicular to the plane of the drawing), is divided into three subpixel, which is modulated by the orientation of the LCD in three spectral bands;

611 - thin-film transistors and other control elements and circuits;

612 - the second polarizer;

613 - fiber-optic plate;

614 - light sources;

615 - light guide layer;

616 - light guiding array elements.

Fig.7. Diagram of the illumination system (side view), performed according to one variant of the invention.

701 - LCD panel (shows only the substrate and the sub-pixels);

702 - the sub-pixels of the LCD panel, which is formed or is modulated color (e.g., 702' - red, 702" - green, 702"' - blue);

703 - fiber-optic plate, consisting of elements which are responsible for the pre is the education of the spectrum (for example, 703' red, 703" - green, 703"' - blue);

704 - microlensing array;

705 - the array of light guiding elements;

706 - light guide layer;

707 - light sources.

Fig Diagram of the illumination system (side view), performed according to one variant of the invention.

801 - LCD panel (shows only the substrate and the sub-pixels);

802 - the sub-pixels of the LCD panel, which is formed or is modulated color (e.g., 802' red, 802 green, 802"' - blue);

803 - microlensing array;

804 - fiber-optic plate, consisting of elements which are responsible for the transformation of the spectrum (e.g., 804' red, 804" - green, 804"' - blue);

805 - an array of light guiding elements;

806 - light guide layer;

807 - light sources.

Fig.9 Diagram of the illumination system (side view), performed according to one variant of the invention.

901 - LCD panel (shows only the substrate and the sub-pixels);

902 - the sub-pixels of the LCD panel, which is formed or is modulated color (e.g., 902' red, 902" green, 902"' - blue);

903 - microlensing array;

904 - fiber-optic plate, consisting of elements which are responsible for the transformation of the spectrum (e.g., 904' red, 904" green, 904"' - blue);

905 - microlensing array;

906 - the array of light guiding elements;

907 - light guide layer;

908 - light sources.

Figure 10 Scheme is and the location of the light sources in the direct backlight type

10-1 - light guide layer

10-2 - light sources.

Consider the example of the illumination system shown in figure 1. Backlight LCD display with LCD panel 101, containing the sub-pixels, which is generated or modulated color (102' - red, 102 green, 102"' - blue), includes one or more light sources 106, the light guide layer 105 and the array of light guiding elements 104 arranged on the light guide layer 105. The light guide layer 105 and the light guiding elements 104 are made of optically transparent material. Between the array of light guiding elements 104 and the LCD panel 101 is a fiber optic plate 103.

The light sources 106 emit white light (LEDs, lasers or fluorescent lamps cold cathode), and in the emission spectrum contains wavelengths of the three primary colors used for LCD (red, green, blue). In the proposed system, the illumination is not necessary to use multiple types of sources of monochromatic radiation.

In the light guide layer 105, the brightness of the radiation becomes more homogeneous, and the array of light guiding elements 104 redirects the light to the LCD panel 101 via a fibre-optic plate 103.

Compared with the technical solution described in the prototype, for forming a color image does not require the use of multiple sources with the ies spectra of radiation.

The main difference of the proposed solutions from the prototype is that the fiber-optic plate 103 is a matrix of elements 103', 103", 103"', converts a spectrum of radiation of the light source radiation with a wavelength corresponding to the color subpixel in the liquid crystal display (Figure 2).

The size and location of the elements 203', 203", 203"' fiber-optic plate 203 (2) correspond to the size and location of sub-pixels 202', 202", 202"' LCD panels: the first row of the matrix elements, converts the wavelength, is located in front of the first row of the matrix liquid crystal panel, the second row of the matrix elements, converts the wavelength, is located opposite the second row of the matrix liquid crystal panel, etc.

Each element is called a fiber-optic plate contains one or more photonic crystal fiber, converts the wavelength, and these fibers are tightly Packed and completely fill the area above item (3).

Photonic crystal fiber includes a set of fibers with a hollow core arranged longitudinally around a hollow or solid waveguide region. Fiber with a hollow core are arranged such that they form a two-dimensional f the ton crystal with a photonic gap. Called hollow or solid waveguide region is formed so that the skip signal with a frequency that lies mostly within the photonic bandgap, so that conversion of the emission spectrum of the light source radiation with a wavelength corresponding to the color subpixel in the liquid crystal display. Examples of photonic crystal fibers with different cross sections, corresponding hollow or solid waveguide region, shown in Figure 4. Examples of the transmission spectra of photonic crystal fibers with the transmission in the red, green and blue bands and metal-halogen lamp at the entrance shown in figure 5. Some examples of the structure of photonic crystal fibers, their functioning and methods of manufacture are described in U.S. patentsâ„–â„–6,829,421 [7]; 6,950,585 [8] and 6,798,960 [9].

To perform the second task of the invention the design of the LCD display containing the system described backlight and LCD panel without the matrix of color filters. The pixel structure of this LCD display is shown in Fig.6. The proposed LCD display contains the first polarizer 601, the optical compensator 602, LCD panel, the second polarizer 612, the illumination system.

The LCD panel includes the following elements: two substrate 604' and 604" shaped electrodes 605 and 610 and control elements and C is drink 611 on the inner surfaces of the substrate 604' and 604", two passivating layer 606' and 606"printed on the inner surface of the electrodes 605 and 610, two orienting layer 607' and 607"printed on the inner surface called passivating layers 606' and 606, the liquid crystal layer 608 between the two substrates 604' and 604" with the above functional layers on their inner surfaces and the spacers 609, located between the two substrates. The protective film 603' and 603 are located on both sides of the LCD panel.

Matrix system shaped electrodes forming pixels of the image generated by the display device. Each pixel is divided into at least three subpixel 610', 610", 610"', in which modulates the orientation of the LCD in three spectral ranges.

The lighting system includes the following elements: light sources 614, the light guide layer 616, the array of light guiding elements 615, fiber-optic plate 613, located between the array of light guiding elements 615 and the LCD panel. The structure and operation of the illumination system similar to that described above.

The main difference of the LCD display from the prototype is the lack of color filters in the LCD panel and use the same type of light sources with a wide range. The formation of a color image in the visible range is by using light beams converted fiber-optical is coy plate and modulation of the orientation of the LCD in three spectral ranges of the sub-pixels 610', 610", 610"'.

In order to avoid losses in the illumination system and further increase the efficiency of use of light sources, the backlight is introduced microlensing array. It is placed between the fiber-optic plate 703, and an array of light guiding elements 705 (7) or between the fiber-optic plate 704 and a matrix liquid crystal panel 701 (Fig). Role microlensing array (704 7 or 803 Fig respectively) is in the gathering light in a wider range of angles and providing almost perpendicular to the fall of the beams at the entrance of photonic crystal fibers (7) or LCD panel (Fig). For an even better collection of light in the backlight, you can use two microlensing array 903 and 905: one between the fiber-optic plate 904 and an array of light guiding elements 906, and the other between the fiber-optic plate 904, and matrix liquid crystal panel 901 (Fig.9).

In the end the illumination system, the light sources are located on the ends of the light guide layer (Figure 1).

In the system of direct backlight light sources are from the rear toward the liquid crystal panel side light guide layer (Figure 10).

In the experimental samples photonic crystal fiber conversion efficiency of the emission spectrum of the metal-halogen La the dust in each of the three primary colors was 75-80%. In a typical LCD each color filter transmits about 20% of the emission of white color. Therefore, the use efficiency of light sources through the use of fiber-optic plate with photonic crystal fibers is improved by 3-4 times.

Although the above embodiment of the invention has been set forth to illustrate the present invention, the experts it is clear that various modifications, additions and substitutions, without departing from the scope and meaning of the present invention disclosed in the accompanying claims.

1. Illumination system matrix liquid crystal display containing sequentially placed one or more light sources, the light guide layer, an array of light guiding elements, fiber-optic plate, located between the array of light guiding elements and liquid crystal display, characterized in that the fiber-optic plate is a matrix of elements, made with the possibility of conversion of the emission spectrum of the light source radiation with a wavelength corresponding to the color generated by the subpixel in the liquid crystal display, and the size and location of these elements correspond to the size and location of sub-pixels of the liquid crystal display, and is erva row of the matrix elements, converts a wavelength that is opposite the first row of the matrix liquid crystal display, the second row of the matrix elements, converts the wavelength, is located opposite the second row of the matrix liquid crystal display, the n-th row of the matrix elements, converts the wavelength, is located opposite the n-th row of the matrix liquid crystal display, each element is called a fiber-optic plate contains at least one photonic crystal fiber, converts the wavelength, and named the fibers are tightly Packed and completely fill the area named member, photonic crystal fiber includes a set of fibers with a hollow core arranged longitudinally around a hollow or solid waveguide region, and fiber with a hollow core are arranged so that they form a two-dimensional photonic crystal with a photonic gap, it called hollow or solid waveguide region is formed so that the skip signal with a frequency that lies mostly within the photonic bandgap, so that conversion of the emission spectrum of the light source radiation with a wavelength corresponding to the color generated by the subpixel idcatart lifestage display.

2. Dot matrix LCD display with backlight system containing consistently located the first polarizer, the optical compensators are made with the possibility of increasing the image contrast in a wide range of angles, the liquid crystal panel, a second polarizer, a backlight system, the protective film located on both sides of the display, with LCD panel includes two substrates with a system of curved electrodes and control elements and circuits on the inner surfaces of these substrates, two passivating layer deposited on the inner surface of these electrodes, two orienting layer deposited on the inner surface called passivating layers, a liquid crystal layer between the two mentioned substrates with called functional layers on their inner surfaces, the spacers between the two substrates, and the illumination system includes at least one light source, the light guide layer, an array of light guiding elements, fiber-optic plate, located between the array of light guiding elements and liquid crystal panel, while the fiber-optic plate is a matrix of elements made with the possibility of converting the spectrum of the radiation source is of IR light radiation, characterized by at least three wavelengths, and the size and location of these elements correspond to the size and location of sub-pixels of the liquid crystal display, and the first row of the matrix elements, converts the wavelength, is located in front of the first row of the matrix liquid crystal display, the second row of the matrix elements, converts the wavelength, is located opposite the second row of the matrix liquid crystal display, the n-th row of the matrix elements, converts the wavelength, is located opposite the n-th row of the matrix liquid crystal display, each element is called a fiber-optic plate contains at least one photonic-crystal fiber, converts the wavelength, and these fibers are tightly Packed and completely fill the area named member, photonic crystal fiber includes a set of fibers with a hollow core arranged longitudinally around a hollow or solid waveguide region, and fiber with a hollow core are arranged so that they form a two-dimensional photonic crystal with a photonic gap, it called hollow or solid waveguide region formed to ignore the signal h is Auteuil, lying mostly within the photonic bandgap, so that conversion of the emission spectrum of the light source radiation with a wavelength corresponding to the color generated by the subpixel in the liquid crystal display, characterized in that the matrix system named curly electrodes of the liquid crystal panel forms a pixel of the image formed called display, and each pixel contains at least three subpixel, which under the action of applied electronic signal modulated by the orientation of the liquid crystal in at least three spectral bands provided by the illumination system, with a color image in the visible spectrum is formed on the display screen using light beams converted photonic crystal fibers, and modulation of the liquid crystal.

3. The display according to claim 2, wherein the color sub-pixels in the liquid crystal display is formed color filters of at least three colors, each element is called a fiber-optic plate performs conversion of the emission spectrum of the light source emission spectrum corresponding to the bandwidth of the color filter, which is located in front of the subpixel matrix liquid crystal panel.

4. Display p is 2, characterized in that between the fiber-optic plate and the array of light guiding elements placed microlensing array.

5. The display according to claim 2, characterized in that between the fiber-optic plate and a matrix liquid crystal panel placed microlensing array.

6. The display according to claim 5, characterized in that between the fiber-optic plate and the array of light guiding elements placed microlensing array.

7. The display according to claim 2, characterized in that at least one light source placed on the ends of the light guide layer.

8. The display according to claim 2, characterized in that at least one light source is placed from the rear toward the liquid crystal panel side light guide layer.

9. The display according to claim 2, characterized in that at least one light source has a wide range of radiation.



 

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5 dwg, 1 tbl

FIELD: modulation of optical signals.

SUBSTANCE: electro-absorption modulator has waveguide structure which contains many sections. Any section has different prohibited area and at least one electrode to be applied to section of optical shift. According to method, optical signal passing through waveguide structure is modulated by means of many sections made for separate addressing due to application of modulation signal to one or more sections and due to electrical shift of one or more sections by means of shift voltage. Specified level of single or more parameters, as depth of modulation and introduced losses, is provided.

EFFECT: widened range of operation; smaller sizes of device.

21 cl, 4 dwg

FIELD: computer engineering.

SUBSTANCE: optical reverse counter contains n identical counting cells, each one of which consists of: optical Y-splitters, optical uniting devices, optical threshold devices on basis of optically connected wave conduits, optical delay line and optical dividers.

EFFECT: ensured counting of impulses with possible reversion.

1 dwg

FIELD: aircraft engineering.

SUBSTANCE: liquid crystal screen comprises light sources of day illuminating positioned directly behind the liquid crystal cell with polarizers and generator of light flux, reflector positioned behind the generator of light flux, and unit for night illuminating. The reflector has openings for passing light from the unit for night illuminating. The openings are arranged uniformly over the area of the reflector.

EFFECT: enhanced reliability.

2 cl, 1 dwg

FIELD: optics.

SUBSTANCE: in phase-shifting device, containing optically connected two phase-shifting plates, installed with a gap for subtraction of phase shifts introduced by them, aforementioned phase-shifting plates are mounted in such a way that their optical axes are turned relatively to each other to reach required precision of phase shift value, and influence of polarization plane rotation value is abolished by element, compensating rotation of polarization plane, having serial optical connection to aforementioned phase-shifting plates. The element which compensates rotation of polarization plane is positioned before first and after second phase-shifting plate and is made in form of optically active plate.

EFFECT: increased precision of required value of phase shift of phase-shifting device.

7 cl, 4 dwg

FIELD: mechanical engineering.

SUBSTANCE: device has signal form generator, power amplifier and electromechanical block, including first fixed magnetic system and first coil of current-conductive wire, additionally included are integrator and corrector of amplitude-frequency characteristic of electromechanical block, and block also has second fixed magnetic system and second coil of current-conducting wire, rigidly and coaxially connected to first coil. Connection of first and second coils with fixed base is made in form of soft suspension with possible movement of first and second coils, forming a moving part of modulator, relatively to fixed magnetic systems, while output of said signal shape generator is connected to direct input of integrator, inverse input of which is connected to speed sensor of moving portion of modulator, output of integrator is connected to input of corrector, to output of which input of said power amplifier is connected.

EFFECT: higher precision.

3 cl, 8 dwg

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