RU2245489C1 - Compact lamp built around light-emitting diodes - Google Patents

Abstract

FIELD: instrumentation engineering; pilot lights for panoramic-view systems.

SUBSTANCE: proposed lamp has a number of insulating boards with light-emitting diodes disposed over perimeter of each board. Optical axes of light sources on one or two sides of board are oriented in meridian planes of entire light-emitting space.

EFFECT: enhanced lighting characteristics and uniformity of light distribution.

6 cl, 5 dwg

Description

The present invention relates to lighting engineering, in particular to optical radiation sources - lamps on semiconductor emitting diodes, generating radiation of red, green, yellow, blue near infrared spectral ranges or white light.

Such lamps are intended for use in light-signaling devices, for example, in obstruction lights, in explosion-proof lighting devices, in lighting devices, light beacons, in light marking lights of airfields and heliports.

Known lamp / 1 / on LEDs, containing equally spaced from its longitudinal axis groups of LEDs mounted on the faces of a convex polyhedron, with the orientation of the optical axis of the LEDs in the space of most of the sphere.

The disadvantages of the analogue are caused by the complexity of the design, increased dimensions. The design is effective mainly in the layout with high-power LEDs requiring intensive heat removal due to conductive heat transfer.

Known obstruction light with a lamp / 2 / on LEDs containing groups of LEDs equidistant from the central rod mounted on current-carrying terminals at an angle to the surface of the circuit boards in the range from 5 to 90 ° on the periphery of identical parallel, disk-shaped circuit boards with axial holes strung on specified rod.

The disadvantages of the analogue are due to the low mechanical strength of the lamp used due to the lack of mechanical fixation of the current-carrying leads in the space on the boards, as well as the difficulties in ensuring the required level and uniform distribution of light intensity in angles from minus 6 ° to plus 6 ° from the horizontal plane, exceeding about 2 times the light intensity formed along the axis of the lamp, which is necessary for most light-signaling, including obstruction lights. In addition, the lamp has insufficient compactness (increased dimensions) of the luminous body, does not provide a high plane of the layout of the LEDs on the boards.

Known lamp / 3 / on LEDs, containing a large number of identical flat electrical insulating disks - boards with axial holes with LEDs soldered around the perimeter with radially oriented optical axes, forming a cylindrical configuration of the luminous body. The boards with LEDs are mounted parallel to each other on the central rod and connected to the current supply means of a standard base.

The disadvantages of the prototype are caused by the unsatisfactory configuration of the luminous body of the lamp, which does not redistribute the light flux along the axis of the lamp and partially into the lower hemisphere at angles of minus 6 ° -10 °, which limits the use of lamps, for example, in barrage lamps or in explosion-proof lighting devices.

In addition, the lamp is not provided with a high completeness of the luminous body due to the insufficient density of the layout of the LEDs on the boards.

The aim of the invention is to remedy these shortcomings of the prototype, increasing the compactness of the luminous body, improving lighting performance, including increasing the luminous flux and uniform distribution of light in space.

This goal is achieved by the fact that in a compact lamp with LEDs containing two, three or more flat electrical insulating boards of round or polygonal shape with mounted and soldered groups of LEDs with current-carrying leads, a central rod holding these boards parallel to each other, a power converter networks and means of current supply, these electrical insulating boards are made of various diameters and hold LEDs installed with mechanically fixed current-carrying and the leads and the selected spatial orientation both along the perimeter of each board and on one or both sides of at least a portion of circuit boards with the orientation of the optical axes in meridian planes of the space at least the upper hemisphere.

The goal is also achieved by the fact that at least part of the electrical insulating, for example, printed circuit boards with LEDs installed on them around the perimeter is inscribed in the curved surface of a truncated cone, part of a sphere, paraboloid or ellipsoid of revolution, and the central rod is located on the longitudinal axis of these bodies of revolution.

The problem is also solved by the fact that the printed circuit boards are made in the form of regular polygons with LEDs soldered and mechanically fixed on the sides and around the perimeter of the boards with the optical axes oriented along the apofems of the polygon, and at least part of these polygonal boards with the same number of angles (n) is installed on the central rod with azimuthal angular displacement relative to each other by 180 ° / n.

The goal is achieved by the fact that LEDs soldered and mechanically fixed on one or both sides of at least one printed circuit board are installed with an azimuthal angular displacement relative to the LEDs installed and soldered around the perimeter of the specified board by 180 ° / m, where m is the number of LEDs, installed around the perimeter of the board. The goal is also achieved by the fact that on two electrical insulating boards of smaller diameter and larger diameter, LEDs are installed with mechanically fixed current-carrying leads passing through the holes in both boards and soldered on the back side of the board of larger diameter.

Achieving the result also contributes to the fact that on the back of the lower printed circuit board with LEDs the elements of the power supply converter are assembled and the board is mounted on a holder interfaced with current-supply means, for example, with a standard socle of type E 27.

The most preferred embodiments of the devices according to the invention are shown in the drawings.

Figure 1. A compact LED lamp with a luminous body inscribed in the curved surface of a truncated cone, side view, partially in section.

Figure 2. The same as in figure 1, a top view.

Figure 3. A compact LED lamp with a luminous body inscribed on the surface of a part of the sphere. Side view, partially in section.

Figure 4. A compact LED lamp on two circuit boards with a luminous body inscribed in a paraboloid of revolution. Side view, partially in section.

Figure 5. The same as in figure 4, a top view.

Shown in figures 1 and 2, the first embodiment of a compact lamp on LEDs contains flat lower 1, middle 2 and upper 3 electrical insulating boards, having the form of regular polygons of different diameters, mounted on the central rod 4 parallel to each other through intermediate tubular spacers 5.

The electrical insulation boards 1,2 and 3 are made in the form of printed circuit boards: the bottom board 1 is in the form of a regular 18-gon, and the middle 2 and top 3 boards are in the form of a regular 3-gon. In the center of each polygonal board there is a hole for placing the central rod 4, made in the form of a bolt, tightening and mechanically with locking of the holding board with a given orientation between them.

Around the perimeter of the polygonal boards 1, 2, and 3, groups of LEDs 6 are installed with current-conducting leads 7 bent at an angle of 90 ° and soldered to each of them in such a way that the optical axes ОО, О 'and О "of the LEDs 6 are oriented in the meridian planes of the upper hemisphere space passing through the apothems “a” (shown by the dotted line in FIG. 2) of the regular polygons and the central rod 4. Moreover, at least a part of the polygonal boards with the same number of angles (n) is mounted on the central rod 4 with an azimuthal angular displacement 180 ° / n relative to each other, providing high uniformity of light distribution across the horizon (O, O 'and O ") and a direction close to the horizon, for example, in vertical angles from + 6 ° to minus 6 °.

The middle board 2 is made of a smaller diameter compared to the board 1, no larger diameter compared to the board 3, which makes it possible even with a small removal of these boards to simultaneously install and solder on the sides (on the planes of the boards 1 and 2) the second concentrically placed group LEDs 8 with current-carrying leads, curved and mechanically fixed on the boards in such a way that the optical axes O ₁ , O _{2 of the} LED 8 are oriented in the meridional planes of the space of the upper hemisphere passing through Without the tops of the polygonal boards and the central rod 4.

The LEDs 6 and 8 of the upper board 3 are also installed with mechanically fixed current-carrying leads and a selected spatial orientation along the perimeter and on the front side of the board with the orientation of the optical axes O "and O ₃ in the meridional planes of space horizontally and at small angles of inclination relative to the longitudinal oc and ZZ lamps accordingly, while ensuring the distribution of the luminous flux into the zenith on the "tail" of the light distribution of the LEDs 8.

D of the lamp embodiment under consideration, the electrical insulating (printed) boards 1, 2 and 3, as well as the LEDs 6 mounted on them around the perimeter, are inscribed in the curved surface of the truncated cone (shown by the dotted line in figure 1), form a similar shape of the luminous body with light distribution, providing light intensity in azimuth and in vertical angles + 6 ° - minus 6 ° ~ 15-20 cd and 7-10 cd in angles +6 - + 174 ° of the upper hemisphere for LEDs with a light intensity of 5-6 cd and a double scattering angle of 2θ _0,5 ≈ 20 °, with permissible unevenness on svetoraspredoleniya horizon less than 30%.

The second embodiment of a compact lamp on LEDs (see figure 3) provides for the implementation of electrical insulating (printed) boards 9, 10, 11 and 12 of various diameters with LEDs 13 installed with a selected spatial orientation around the perimeter of these boards, as well as with LEDs 14 and 15 on one (for boards 11 and 12) and on both (for board 10) sides of the boards, respectively, with the orientation of the optical axes O, O ', O'',O''', as well as O ₁ , O ₂ O ₃ , O ₄ and O ₅ in the meridional planes of space and along the horizon of most of the sphere, mainly in the angles o t minus 10 ° to plus 90 ° relative to the horizon.

At the same time, at least part of the printed circuit boards and the LEDs 13 installed on them along the perimeter are inscribed in the curved surface of a part of the sphere (shown by the dotted line in Fig. 3) of either a paraboloid (see Fig. 4) or an ellipsoid of revolution (not shown in Fig.), and the Central rod 16 is located on the longitudinal axis of these bodies of revolution.

Soldered and mechanically fixed LEDs 14 on one side of the printed circuit boards 11 and 12 or LEDs 15 on both sides of the board 10 are installed with an azimuthal angular displacement (similar to the layout for the 1st lamp option, see figure 2) relative to the LEDs 13 installed on the perimeter of the specified board by a value of 180 ° / m, where m is the number of LEDs 13 placed around the perimeter of the board, which ensures high uniformity and smooth light distribution.

The fixing of the current-carrying terminals of the LEDs 6, 8 and 13, 14 on the boards is carried out by soldering the ends of the terminals and filling the middle part of the terminals with an electrical insulating compound 16a (see Fig. 3)

The embodiment of the lamp shown in FIGS. 4, 5 on two electrical insulating boards 17 and 18 of smaller and larger diameters, respectively, with LEDs mounted on them with mechanically fixed current-carrying leads 19 and 20. Moreover, the leads 19 of the upper board of a smaller diameter pass through an opening in it, as well as through holes in the lower board 18 of large diameter and soldered on the back of the latter, while simultaneously providing mechanical fixation of the leads of the LEDs on the upper and lower boards, as well as electrical connections them with each other on the bottom plate 18.

All the proposed options for the implementation of a compact lamp on LEDs provide for shunting of LEDs or groups of LEDs installed on the boards with zener diodes (not shown in Fig.), Which are mounted directly on these boards or on the bottom board, which ensures the lamp operation in case of failure of one or more LEDs .

For all lamp designs (see FIGS. 1, 3 or 4), on the back of the lower printed circuit board 1, 9 or 18 with LEDs, the elements of the power supply converter 19a are assembled and the specified board is mounted on the holder 20a, coupled to the current supply means, as which can be used with a standard base 21 of type E 27 (Fig. 1) or a supporting bracket 22 and a conductive wire 23 (Figs. 3 and 4).

It is also possible to use a low-voltage lamp power supply from a direct current source with a current-limiting resistance without an industrial network converter.

The second embodiment of the lamp provides the formation of an almost circular symmetric indicatrix of light intensity in most of the sphere, which is preferable for use in lighting, for example, explosion-proof lighting devices.

The advantages of the proposed LED lamp options are to increase the compactness of the luminous body, reduce the dimensions, as well as to improve the lighting performance, including increasing the light flux and uniform distribution of light in space.

Literature

1. A lamp on light-emitting diodes. Pat. RF №2158876, class F 21 S 8/10. Publ. November 10, 2000, Bull No. 21.

2. Barrage fire. St. on the floor. model No. 24719, class F 21 S 2/00, 8/110. Publ. 08/20/02. Bull. 23.

3. Pat. France No. 2714956, class F 21 Q 3/02. Publ. 07/13/95

Claims (6)

1. A compact LED lamp containing two, three or more flat circular or polygonal electrical insulating boards with groups of LEDs mounted and soldered onto them with current-carrying leads, a central rod holding these boards parallel to each other, a power supply converter and current-carrying means, characterized in that the electrical insulating boards are made of a finite diameter and hold the LEDs installed with mechanically fixed current-carrying leads and with a selected transtvennoy oriented simultaneously along the perimeter of each electrically insulating board and on one or both sides, at least a portion of the electrical circuit boards, with the orientation of the optical axis in the meridional plane of the space, at least the upper hemisphere. 2. A compact LED lamp according to claim 1, characterized in that at least part of the electrical insulating, for example electrical insulating printed circuit boards with light emitting diodes installed on them around the perimeter, are inscribed in the curved surface of a truncated cone, part of a sphere, paraboloid or rotation ellipsoid, and the central the rod is located on the longitudinal axis of these bodies of revolution. 3. A room lamp with LEDs according to any one of claims 1 and 2, characterized in that the insulating printed circuit boards are made in the form of regular polygons with LEDs soldered and mechanically fixed on the sides and around the perimeter of the boards, with the optical axes oriented along the apophems of the polygon, and, according to at least a part of said polygonal boards with the same number of angles (n) are mounted on the central rod with an azimuthal angular displacement of 180 ° / n relative to each other. 4. A compact LED lamp according to any one of claims 1 to 3, characterized in that the LEDs are soldered and mechanically fixed on one or both sides of at least one electrical insulating printed circuit board with azimuthal angular displacement relative to the LEDs installed and soldered by the perimeter of the specified board by 180 ° / m, where m is the number of LEDs installed around the perimeter of the electrical insulating printed circuit board. 5. A compact LED lamp according to any one of claims 1 to 4, characterized in that on two electrical insulating boards of smaller diameter and larger diameter, LEDs are installed with mechanically fixed current-carrying leads passing through holes in the electrical insulating printed circuit board and soldered on the back side of the electrical insulating printed circuit board larger diameter circuit board. 6. A compact LED lamp according to any one of claims 1 to 5, characterized in that on the back side of the lower electrical insulation printed circuit board with LEDs the elements of the power supply converter are assembled and the electrical insulation printed circuit board is mounted on a holder that is connected to a current supply means, for example, with a standard a socle of type E 27.

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