RU2706799C1 - Flat led illuminator with wide range of light power and internal illumination - Google Patents

Abstract

FIELD: lighting engineering.

SUBSTANCE: invention relates to lighting engineering and can be used for creation of decorative lighting design lighting devices and advertising light panels. Flat LED illuminator with a wide range of light power and internal illumination comprises a flat light guide, a radiator, a printed-circuit board with light-emitting diodes, light of which is directed to the end of the inner cylindrical hole in the light guide, a flat reflector, diffuser, power supply, wherein radiator, light guide and reflector are connected in illuminator center by means of bushing and screw with nut.

EFFECT: wider range of equipment.

1 cl, 23 dwg

Description

Technical field

The invention relates to lighting technology, and in particular to lighting devices based on an end-illuminated fiber, which can be used for general or local lighting, as well as for creating decorative, design and advertising light panels.

Prior art

Flat illuminators, as a rule, work on the principle of Edge Lighting (end lighting) with external illumination of the ends of the fiber. There are designs of illuminators in which the fiber is illuminated through the inner ends of the hole. According to the first option, a large number of LED panels are produced with illumination of one, two or four sides of the illuminator, as a rule, such panels produce illuminators with an external power source (IP). However, the company “Display Systems” (Russian Federation, 105484, Moscow, 16-Parkovaya ul., 26) produces such panels with a thin-profile IP built into a thin-profile frame. The disadvantage of such panels is the difficulty of manufacturing panels of large sizes and at the same time of irregular shape, different from rectangular, and the presence of a large number of LEDs on a very long printed circuit board, which must be placed around the perimeter of the illuminator.

The present invention provides various variants of illuminators with internal illumination at the end of a circular hole in the light guide. This method can significantly reduce the number of LEDs and the size of the printed circuit board on which they are located, as well as create illuminators of various shapes. At the same time, in large-sized illuminators there can be one or more holes in the optical fiber through the ends of which light from LEDs propagates.

Disclosure of the invention

The essence of the invention lies in the fact that the fibers are mounted on a large flat radiator, which is located on a plane or near the plane of the fiber, opposite the plane of radiation of the illuminator. Because of this, its size can be very significant, which allows you to create illuminators with a capacity of up to several hundred watts, a very significant size, up to the size of the ceiling of a room or hall.

Brief Description of the Drawings

In FIG. 1 shows a variant of the illuminator with internal illumination.

In FIG. 2 shows a lighter similar to FIG. 1, but with the housing 1, 2 attached to it.

In FIG. Figure 3 shows a illuminator with two optical fibers 7, 28 and two printed circuit boards 6.26 with two groups of LEDs.

In FIG. 4 shows a lighter similar to FIG. 3, but with a basement housing including a power source (driver).

In FIG. 5 shows a lighter in which the radiator 3 is made completely flat.

In FIG. Figure 6 shows the design of the illuminator, the power of which can be very large, and the dimensions are several square meters.

In FIG. 7 shows a lighter similar to fig. 6, but with two groups of LEDs.

In FIG. 8 and 9 show illuminators with one (Fig. 8) and two (Fig. 9) optical fibers.

In FIG. 10 shows a illuminator with two optical fibers and two groups of LEDs, to which a housing with a base and a power source is attached.

The implementation of the invention

In FIG. 1 shows a variant of the illuminator with internal illumination. The basis of this illuminator is an aluminum radiator 3 having an extrusion in the form of a cylinder, on which a printed circuit board 6 with LEDs is located. The LEDs shine at the end of the fiber 7, on which the diffuser 8 is located on the same plane and the reflector 5 on the other plane. The washer 4 acts as a reflector and also determines the distance of the radiator 3 to the fiber 7, the gap between them determines the possibility of heat dissipation from the radiator from the fiber side . The other plane of the radiator 3 is free and dissipates heat from the LEDs from the entire surface. The sleeve 21 fastens the entire structure with the screw 25 of the nut 22 and the washer 4. A white reflector 11 is located around the illuminator. Also around the perimeter of the illuminator, the entire package is attached with three rivets 9 located at 120 ° to each other. The illuminating plane is the entire surface of the illuminator except for the circle limited by the printed circuit board 6 with LEDs (this plane does not emit light). The bends 29 in the radiator are also located at 120 ° and serve to create a gap between the ceiling and the radiator, if the illuminator is firmly pressed to the ceiling. The power of the illuminator is limited by the diameter of the extrusion in the radiator, the number of LEDs placed, their power and the ability to remove heat from the LEDs.

In FIG. 2 shows a lighter similar to FIG. 1, but with the housing 1, 2 attached to it, in which the power supply board 14 and the base 10 are installed (analogue of GU-10, but can be any other, E27, etc.). Springs 13 are used to mount the illuminator in the opening of the ceiling.

In FIG. Figure 3 shows a illuminator with two optical fibers 7, 28 and two printed circuit boards 6, 26 with two groups of LEDs (there may be one board, then the inner group of LEDs is located on the back of the board 6). In this embodiment, the unlit zone on the illuminator will be in the form of a ring between the LED boards (quite invisible), and also in the form of a ring under the washer 15.

In FIG. 4 shows a lighter similar to FIG. 3, but with a basement housing including a power supply (driver).

The disadvantage of the designs shown in FIG. 1 and 4, the LEDs are located on a printed circuit board, which fits the radiator extrusion cylinder, a gap can be formed between them that increases the thermal resistance in the contact zone, as a result of which the heat dissipation efficiency of the radiator decreases.

In FIG. 5 shows a illuminator in which the radiator 3 is absolutely flat and at the same time is a printed circuit board for LEDs that are arranged in a circle, the light from the LEDs goes perpendicular to the fiber 7 and parallel to the plane of its end in the hole and turns 90 ° toward the end of the fiber with a sleeve 15 , the conical face of which is mirrored, and the material of the sleeve itself may be translucent or opaque to the light of the LED. In the first case, the area of the illuminator, from which light is not emitted, can be limited by a circle with a diameter equal to the screw head, and in the second case, by a circle with a diameter of the sleeve. It is quite obvious that with increasing diameter of the circle on which the LEDs are located, the diameter of the central circle that does not emit light will increase, so if this is unacceptable, the power of the illuminator is limited.

In FIG. Figure 6 shows the design of the illuminator, the power of which can be very large, and the dimensions are several square meters. In this design, as well as to hell. 5 a flat radiator 3, which at the same time can be a printed circuit board for installing LEDs in a circle, but, unlike fig. 5, it has two optical fibers 7 and 16, which are illuminated by one group of LEDs through a prism with two faces located at an angle of 45 ° to the plane orthogonal to the fiber body. These faces of the annular prism direct light from the fiber to the outer end of the inner fiber and to the inner end of the outer fiber. The distribution of the light flux between the fibers depends on the location of the top of the two-sided prism relative to the radiating surface of the fiber, while in order to obtain uniform radiation of the light flux from the surface of the illuminator, the ratio should be maintained:

S ₁ / S ₂ = F ₁ / F ₂ , where:

S ₁ and S _{2 the} area of the optical fibers 1 and 2,

F ₁ and F ₂ - light flux falling into the light guide 1 and 2.

It is quite obvious that by increasing the diameter on which the LEDs are located, we can increase their number and power of the LEDs and illuminator.

In this case, the dark zone may not exist at all depending on the transparency of the shaped sleeve - prism 4.1, and if it is opaque, the dark zone will be in the form of a ring defined by the diameters of the sleeve 15 (outer and inner diameters of the sleeve).

In FIG. 7 shows a lighter similar to that. 6, but with two groups of LEDs, with each of the groups in the form of rings, located opposite one of the faces of the prism, that is, each group of LEDs illuminates the end of its fiber.

In FIG. Figures 8 and 9 show illuminators with one (Fig. 8) and two (Fig. 9) light guides to which the housing 1, 2 with a base 10 and a power supply 14 are attached for direct mounting on the ceiling using a spring 13.

In FIG. 10 shows a illuminator with two optical fibers and two groups of LEDs, to which a housing with a base and a power source is attached.

Obviously, there may be a series of combinations, since these illuminators can be either built into a hole in the ceiling or suspended. In the first case, they can be a direct replacement for Spot - illuminators with a ceiling height of not more than 6 meters. In the case of a suspended version, the power source can be either external or internal, in the latter case, it can be located inside the circle with LEDs directly on the radiator.

In the case of a suspended version, these illuminators can have both down and down and up lighting, while the radiator can replace (have functions) the reflector, and those places of the fiber that are not protected by the reflector will emit light up (to the ceiling).

In the presence of two or more groups of LEDs, each group can be controlled separately, have different colors. The number of optical fibers and groups of LEDs is limited only by size, while all of these groups can be located on one or more flat radiators.

It is possible to build decorative lighting devices on these principles, in which the aluminum radiator-reflector can be the base, LEDs are located on it, and light guides in the form of decreasing rings are located between the LED rings, and between these rings there are ring prisms (one-sided or two-sided) with This control groups of LEDs is made to the desired order in color and radiation intensity.

Separate ring optical fibers can be not only classical, but they can also be polygons and other shapes that are not necessarily homogeneous, but the shapes of optical fibers, prisms, and the location of LEDs should be kept the same within the same group (optical fiber, prism, the figure along which the LEDs are located).

A decorative panel consisting of several figures (one in one on the same plane) can be assembled in the form of a multilayer structure (radiator reflector, light guide, diffuser) and fixed around the perimeter and in the center. Between the LEDs, regardless of the shape, there are prisms, opposite which there are LEDs on the radiator, the shape of the installation perimeter of which repeats the shape of prisms and optical fibers.

In contrast to the same decorative panels for lumen, these designs differ several times less in the number of LEDs, flat design and the absence of characteristic for lighting systems on the lumen - points that badly affect vision.

In the manufacture of large-area lighting systems, more than one set (radiator, LEDs, prism) is installed in them on a single fiber, in which there are more than one hole with a single reflector and diffuser. For example, on a 2 m sheet, 2 sets are installed in 2 holes.

Claims (15)

1. A flat LED illuminator comprising: flat fiber radiator; circuit board with LEDs; flat reflector a reflector around the perimeter of the fiber; diffuser characterized in that a flat fiber has at least one cylindrical hole, the wall of which has an inner end surface, the flat radiator has a cylindrical protrusion located in a cylindrical hole of the fiber, on which a printed circuit board with LEDs mounted on the cylindrical surface is mounted, which can illuminate the inner end surface of the cylindrical hole, between the flat waveguide and the flat surface of the radiator is placed an annular washer of reflective material mounted around a cylindrical extrusion of a flat radiator to create a heat-dissipating gap; a flat reflector is located on a flat surface of the fiber, wherein the flat radiator with the LED board and the ring washer are connected to the flat light guide and the flat radiator using a sleeve and a screw with a nut, and the reflector around the perimeter of the fiber is made in the form of a U-shaped shell. 2. A flat LED illuminator according to claim 1, characterized in that a flat radiator with an LED board and an annular washer are installed in each cylindrical hole made on a flat fiber.

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