Light-emitting device and lighting unit

FIELD: electricity.

SUBSTANCE: invention relates to lighting devices. In a light-emitting device a light source has narrow or limited distribution of light intensity. The device is designed so that light from a source is emitted with a wider spatial distribution of light intensity through a peripheral surface at the light emission section designed as a funnel.

EFFECT: light-emitting device in addition contains a mixing section for the light radiated from the source.

13 cl, 8 dwg

 

AREA of TECHNOLOGY

The present invention generally relates to the field of lighting design and, in particular, to a light emitting device and a lighting device according to the preamble of the independent claims.

The LEVEL of TECHNOLOGY

Traditional incandescent light sources equipped with a tungsten filament, which is made to glow by passing an electric current through it. The filament is usually suspended near the center of the glass bulb, thereby providing the light intensity, which is almost constant in all radial directions. The radial distribution of light, together with the high brightness of the filament at the time, made popular incandescent light sources for General lighting purposes, for example for use in chandeliers. The crystals in the chandeliers demonstrate the glowing light effects, all of which are highly decorative.

However, incandescent light sources suffer from disadvantages such as short service life and high power consumption.

Replace incandescent light sources led light sources can mitigate or eliminate the aforesaid problems and to provide a significant increase in efficiency. However, most LEDs can emit light only in the hemisphere (the solid angle, Ω=2π sr) whereas incandescent light sources, using the glowing filament, typically emit light uniformly in almost complete sphere (solid angle, Ω=4π sr).

In the US 7352510 disclosed a device comprising first and second components of the mixing of light, which is optically connected to the optical focusing elements for creating a light beam of uniform intensity and illumination from a single or multi-color source, such as LED matrix. The first element of the mixing of light creates a uniform distribution of light from a polychromatic source, while the light intensity distribution remains uneven. The focusing element and the second component mixing of light are used to homogenize the intensity distribution of the light beam received from the first component mixing light, whereas the intensity distribution relative to the optical axis remains essentially unchanged.

Summary of the INVENTION

In view of the foregoing, the object of the present invention is to provide a light emitting device and a corresponding lighting device that is able to transfer light from a light source having a narrow or limited distribution of the light intensity, and light output from at least the broader spatial light intensity distribution.

This task has been successfully execu� through a light emitting device and a corresponding lighting device according to the independent claims.

Thus, according to the aspect of the present invention provides a light emitting device comprising a light unit having at least one light source and the light guiding unit. Fiber node contains a portion of the input light to receive light from the light source, the phase of the output light and the area of mixing of light. The area of mixing of light is arranged between the portion of the input light and the phase of the output light. Besides, the plot of output light is funnel-shaped, having a base that is arranged to receive light from a portion of the mixing light, and includes a top surface that is curved, and the bottom surface, which is concave. Plot of output light is additionally arranged to have an annular surface of the light output. The upper surface and the lower surface of the portion of the output light is determined light guide path from the base to the circumferential surface of the output light.

Thus is provided a light emitting device that is arranged to convert light having a narrow angular distribution of the light intensity, the light with a wider angular distribution of light intensity. The light from at least one light source is mixed on site mixing of light and then uniformly introduced into the plot of output light in the shape of a funnel which is arranged for to guide and to output the light through the output surface of the annular. The configuration thus allows the use of a light source with a narrow angular intensity distribution of light, receiving, however, the output angular distribution of the light intensity, substantially similar to the light intensity distribution of a filament light source, it is desirable that, for example, in lighting applications General purpose. Disclosed light emitting device can be used to replace the modern incandescent bulbs and use as a light source of high brightness, for example, in the chandeliers.

According to the embodiment of the light emitting device is at least one light source is a led, LED. LEDs provide a number of benefits, such as long service life, low power consumption, small size and so on, According to the idea of the present invention, the LED can be advantageous to use in lighting applications where LEDs have traditionally been unsuitable because of limited angular distribution of the light intensity.

According to the embodiment of the light emitting device cross-section area of mixing light has a hexagonal or square shape. These configurations introduce a correction for highly efficient mixing in�Eden light.

According to the embodiment of the light-emitting device, the upper surface configured as output light. In this configuration, in addition to the annular light output, the upper surface of the portion of the output light in the shape of a funnel enhances the angular intensity profile of the output light from the light emitting device.

According to the embodiment of the light-emitting device, the length of the mixing of light so arranged, that allows you to adjust the color uniformity of light of a predetermined color. The length of the mixing of light is preferably used to adjust the desired color uniformity, when the light node is configured with multiple light sources of different colors. For example, the light sources may represent a combination of LEDs of different colors, for example white cold together with warm white, cold white together with yellow, red, green and blue (RGB) or red, green, blue and yellow (RGBA).

According to the embodiment of the light-emitting device, at least a subregion of the surface area of mixing of light arranged to have an optical microstructure to enhance mixing of light on the area of mixing of light. With the strengthening properties of the light mixing area blending�of light, the length of the area of mixing of light can be reduced. Thus, it is possible to reduce the size of the light-emitting device, however, getting the desired mixing of the light.

According to the embodiment of the annular light emitting device output surface of the light are arranged perpendicular to the portion of the input light. Thus, the plot of output light in the shape of a funnel tolerates at least one light source to the circumferential surface of the output light and changes the main direction of the light and distributes it to 90 degrees in all directions, which leads to a toroidal distribution of the light intensity of the output light. For a more complete distribution plot of output light can, alternatively, to arrange so that a certain amount of light going out from the upper surface of the funnel.

According to the embodiment of the light emitting device, a light node further comprises at least one collimation element. Emission profile of the light output from the light sources affect the final angular distribution of light output from the device. The collimation of light from at least one light source to the entrance to the area of mixing of light can strengthen management of angular distribution of light intensity of light output from svetosilu�delivery device. Through proper collimation, essentially all of the light introduced into the portion of the input light can be transported and output via the annular surface of the light output. In addition, the collimation can be preferably used to improve the transmission factor of the optical power of light received by the portion of the input light.

According to the embodiment of the annular light emitting device output surface of the light is curved. Through this configuration, the angular distribution of light intensity can be controlled separately. The angular intensity distribution of the light can be deflected to provide a more complete angular distribution of the light intensity. The desired intensity distribution can additionally be achieved by appropriate design of the curvature of the circumferential surface of the output light. The curvature can be selected, for example, according to the curve of Beltera.

According to the embodiment of the annular light emitting device output surface of the light at least partially linked with additional surface structure, which preferably allows additional control or manipulate properties of the output light.

According to the embodiment of the light-emitting device and the surface�balanced structure constitutes one of the refracting patterns, holographic patterns, thin coating particles and rough surfaces to adapt the output light, suitable for a predetermined lighting application. For example, the annular surface of the light output can be provided to the structure of direct scattering, which distributes the angular intensity distribution of the incident rays in the Lamberts profile desirable for most lighting applications. This can be effectively achieved by means of a holographic structure.

According to the embodiment of the light emitting device, a light node further comprises a reflector. The reflector can be configured to reflect light from the light sources toward the area of mixing of light, thus increasing the amount of light introduced into the area of mixing of light, and thus, subsequently increasing the total luminous flux emerging from the light-emitting device.

According to the embodiment of the light-emitting device, the device further adapted to modernization in the lighting device using an incandescent light source. Thus, the device conforming to the present invention can preferably be used to replace incandescent light source or to adapt to various lighting �the material, normally used for incandescent light sources such as lamps on the basis of the filament, halogen lamps, etc., which is an advantage because the user can easily replace expensive and inefficient incandescent light sources in existing lighting fixtures for a light emitting device in accordance with the present idea of the invention.

According to the second aspect of the present invention provides a lighting device comprising at least one light emitting device. The lighting device demonstrates the benets are described for light-emitting devices.

These and other aspects, features and advantages of the invention will be apparent and elucidated from the following options for implementation.

BRIEF description of the DRAWINGS

The invention will be described in more detail below and with reference to the accompanying drawings, in which identical or similar elements are designated by the same positions.

Fig.1a is a schematic sectional view of the light-emitting devices that meet embodiment of the present invention.

Fig.1b is a schematic side view in perspective of a light emitting device that meets embodiment of the present invention.

Fig.1c is a schematic side view in perspective of the light-emitting device�and, responsible embodiment of the present invention.

Fig.2 illustrates an exemplary light intensity profile of the angular intensity distribution in the far field for light emitted from a light emitting device that meets embodiment of the present invention.

Fig.3a is a schematic side view in perspective of a light emitting device that meets embodiment of the present invention.

Fig.3b is an enlarged view of a part of the plot of output light of the light-emitting devices that meet embodiment of the present invention.

Fig.3c illustrates an exemplary light intensity profile of the angular intensity distribution in the far field for light emitted from a light emitting device that meets embodiment of the present invention.

Fig.4 illustrates an exemplary lamp containing a light-emitting device conforming to the present invention.

DESCRIPTION of PREFERRED embodiments

Embodiments of the present invention will be described in more detail below and with reference to the accompanying drawings, which shows certain embodiments of the invention. However, this invention can be implemented in many different forms, and it should not limit options outlined here OS�enjoyment. Implementation options are presented by way of example so that this disclosure will be exhaustive and complete and will fully convey the scope of the invention to specialists in this field. The drawings provided with a through notation.

Fig.1a shows a schematic sectional view of the light-emitting devices that meet embodiment of the present invention. The light emitting device 100 includes a light node 101, which is arranged to have two sources of light 102. Light sources mounted on the reflector 103. In this exemplary embodiment, the implementation as sources of light 102 are used Lamberton LED. The Lamberts this LED optical source, reporting to the cosine law of Lambert

I=I0cos(α)Equation 1

where α is the angle, I0the intensity of the light at α=0, i.e. perpendicular to the LED.

From Ur. 1 shows that the intensity of light at a viewing angle close to α=90°, very small. Examples of commercially available Lamberth LEDs are Luxeon Rebel LED or Luxeon K2.

Note that other types and number of light sources applicable to the light-emitting device and is considered relevant to the scope of the present invent ideas�of. In addition, other color light sources and/or combinations of colors of light sources applicable to the light-emitting device according to the present invention.

In addition, the light emitting device 100 includes an optical fiber node 110, which contains the elongated section 120 of the mixing of light and the area 112 of the output light. Plot 120 mixing of light can have, for example, a cylindrical shape. Plot 120 of mixing light is arranged on a light node 101. It is additionally arranged to receive light emitted by the source light 102 at a first end through a section 111 of the input light, for example the surface area of the light mixing, and mixing the adopted light as it moves through the portion 120 of the mixing of light and along the main optical axis oa extending along and parallel to the section 120 of the mixing of light, and then to uniformly introduce the mixed light in the area 112 of the light output.

Suitable materials for fiber node 110 can be transparent polymers such as polycarbonate (PC), polymethylmethacrylate (PMMA), polyethylene terephthalate (PET), acrylic resin, glass or any combination of them.

Plot 112 of the output light has the shape of a funnel. The base 117 of section 112 of the output light is arranged to receive the mixed light of section 120 of the mixing of light. In addition, the bottom surface 114 and ve�hnaa surface 113 of section 112 of the output light in the shape of a funnel define a circular path of light to travel light. The annular surface 115 of the output light is arranged on the upper edge of the funnel-shaped section 112 of the light output, thereby providing a surface light output for the light path defined by the upper surface 113 and the bottom surface 114 on which the light propagates. In this illustrative embodiment of the, annular surface 115 of the output light is a flat surface arranged perpendicular to the optical axis. The upper surface 113 and a bottom surface 114 in this illustrative embodiment of the curved, namely the upper surface 113 is curved, and the bottom surface 114 is concave.

In alternative embodiments, the flat surface can be configured to have different predetermined angle relative to the optical axis (not shown). For example, a predetermined angle over 90° provides an efficient way to layout a lower lighting systems (for example, 60% of the flow below the “horizon” and 40% of the flow above the horizon). In the same way you can get top lighting system, arranging a predetermined angle less 90 degrees.

According Fig.1b, which shows a schematic side view in perspective of a light emitting device that meets embodiment of the present invention, the section 120 of the mixing SV�that has a hexagonal cross section, when viewed in the plane of thexy. According to the embodiment of the light emitting device shown in Fig.1c, plot 120 of mixing light has a square cross section, when viewed in the plane of thexy. Both of these cross-sections provide effective mixing of light for mixing light of different colors.

According to the embodiment of the light-emitting device section 120 of the light mixing, optionally equipped with an optical microstructure to enhance the properties of the light mixing section 120 of the mixing of light. Optical microstructure can be configured on the surface 120a of section 120 of the mixing of light, see Fig.1a. Increasing mixing properties of light, it is possible to reduce the required length of section 120 of the mixing of light.

According to the embodiment of the light-emitting device, the length of the section 120 of the light mixing linked with the ability to adjust the color uniformity of light of a predetermined color. As an illustration, the length of the area of mixing of light can be adjusted to ensure good mixing of the light from the light cold white LED and a yellow LED. Thus, the mixed light can achieve color uniformity, suitable to simulate the external signs of an incandescent lamp.

Fig.2 shows an illustrative profile of the light intensity, Gloversville light intensity in the far field I(θ, φ) in the projection on the xz-plane light is emitted from the light emitting device 100 of the above-described light emitting device, in accordance with the present invention. Here θ denotes the polar angle relative to the z axis, and φ denotes the azimuthal coordinate in the xy plane relative to the x axis. In this illustrative embodiment, the implementation, the z axis coincides with the z axis and the orientation of the device shown in Fig.1a and 2, the symbols A and B to indicate the position of the upper and lower parts of the light-emitting device, respectively. Full three-dimensional intensity is a surface of rotation around the z axis.

The profiles of the light intensity distribution shown in Fig.2 and 3c, formed by modeling the embodiment 100 shown in Fig.1b and 3, respectively, using the software ray tracing from Optical research Associates (LightTools®).

The main part of the light entered from section 112 of the mixing of light in the portion of the output light is output through the annular surface 115 of the output light. However, the upper surface 113 according to the modalities of implementation of the light emitting device 100 is arranged to provide additional light output. Therefore, for example 10-20% of the light can be output through the upper surface 113, which, consequently, increases the Shire�NY angular intensity profile of the light. In the angular distribution of the light intensity according to an illustrative embodiment of the described with reference to Fig.1b and angular distribution of the light intensity of which is shown in Fig.2, the contribution of the light output from the top surface 113, presents the intensity distribution along the optical axis (the direction A in Fig.2).

Profile of the radiation light 102 can affect the angular profile of the light intensity for the light output from light emitting devices 100, 200.

According to the embodiment of the light emitting device, a light node 101 is further provided with a collimation element (not shown) which is, for example, a collimator lens or a mirror, for strengthening governance angular distribution of light intensity of light output from light emitting devices 100, 200.

In an alternative embodiment of the light emitting device small curvature of the lower surface 114 and the upper surface 113 is arranged so as to ensure that essentially all of the light introduced in section 112 of the output light is directed through a curved light guide part and is then discharged through the annular surface 115 of the output light. In illustrative embodiments, the annular surface 115 of the output light is focused under HS�ohms to about 90 degrees to the base 117 of section 112 of the output light, and section 111 of the input light. Element in the shape of a funnel tolerates at least one light source, for example (Lamberth) LED source to the circumferential surface 115 of the light output and, thus, modifies the main direction of light by ~90 degrees in all directions. This leads to a toroidal distribution of the light intensity of the output light (see Fig.2). To ensure full distribution is accepted that some of the light out of the upper surface 113 of the plot of output light in the shape of a funnel.

In another illustrative embodiment of the light emitting device shown in Fig.3a, the disclosed light emitting device 200, providing almost perfect Omni-directional angular distribution of the light intensity. The device 200 includes a light node 101 and the fiber node 110, and, in its basic construction, configured similarly to the previous illustrative embodiment of the described with reference to Fig.1b. The light node 101 is configured to have a reflective cavity 103 in which are arranged two LEDs (lamberty with a sharp cut off at 2×30 degrees). The light from the light sources are collimated by the collimation structure (not shown) prior to insertion into the station 120 mixing of light.

In addition, section 112 of the output light is arranged to �to Bladet curved annular surface 215 of the output light, see enlarged view in Fig.3b. A curved annular surface 215 of the output describes the bézier curve. In alternative embodiments, other applicable form curved annular surface 215 of the output. The surface 215 of the output light is additionally arranged to have the structure of direct scattering, which distributes the incident light into the Lamberts profile. The structure of the direct scattering in this case is a holographic structure. In alternative embodiments, a thin layer of particles, for example particles of TiO2, ZrO2or porous polymer, or rough structure can be arranged on the surface 215 of the output light for the redistribution of the angular light intensity distribution.

Refractive and/or holographic structures can be included in the composition of the device during its manufacture, for example using injection molding by providing a mold corresponding structures. Thin layers of particles can be combined thin-film methods, spraying, etc.

Fig.3c shows an illustrative profile of the light intensity angular distribution of the light intensity in the far field for light emitted from a light emitting device 200, responsible embodiment of the present invention. Here locatio�adelene light intensity is almost omnidirectional, essentially uniform angular distribution of light intensity.

The present invention further relates to a lighting device comprising the above-described light emitting device 100, 200.

According to the embodiment of the light-emitting device, the device further adapted to modernization in lighting instrument designed for use incandescent light source, i.e. adapted for insertion in lighting design, typically used for incandescent light sources such as lamps on the basis of the filament, halogen lamps etc This replacement incandescent light source in such lighting fixtures to the light-emitting device according to the present invention becomes possible.

Fig.4 shows an illustrative embodiment of the light emitting device, adapted to 400 modifications. Light-emitting device 400 is arranged to have the cap 401 for inclusion in lighting design, typically used for incandescent light sources. Base 401 is arranged to interact mechanical and electrical, with light-emitting device 100, 200. Base 401 further helps to eliminate the heat generated by the light sources. Alternatively, the light node 101 is arranged �La, to possess a separate heat sink (not shown). Light-emitting device 400, optionally arranged with a glass bulb 402, for example, to create the appearance of a flame of a candle in the chandelier and to protect the optical element from touching, dust and dirt.

The above-described embodiments of a light emitting device according to the present invention are reflected in the claims. They should be considered as non-restrictive examples. Specialists in the art can offer numerous modifications and alternative embodiments of the within the scope of the invention.

Note that, for the purposes of this application, and in particular, in connection with the appended claims, the word “contains” does not exclude other elements or steps, and the use of the names of elements or stages in the singular does not exclude the presence of a lot of that, of course, obvious to the person skilled in the technical field.

1. Light-emitting device (100), comprising: a lighting unit (101) having at least one source (102) light, and
optical fiber node (110),
mentioned optical fiber node contains:
part (111) of the input light to receive light from the light source,
part (112) of the output light and
part (120) of the light mixing arranged between the input light and a part of you�ode to light and reflecting light along the inner surface,
mentioned part (112) of the output light is made in the shape of a funnel containing:
base (117) arranged to receive light from the said part of the mixing of light,
the upper surface (113), which is curved,
the bottom surface (114), which is concave, and
peripheral surface (115) of the output light, is arranged essentially perpendicular to the portion of the input light,
the said surface of the output light is inserted between said upper and lower surfaces,
wherein said top surface and the said bottom surface define a light guiding path from the base to the mentioned peripheral surface of the output light to create essentially toroidal intensity distribution.

2. Light-emitting device according to claim 1, wherein the cross section of the said part (120) of the light mixing has one of a hexagonal shape and a square shape.

3. Light-emitting device according to any one of the preceding paragraphs, which referred to the upper surface (113) configured to be output light.

4. Light-emitting device according to any one of claims. 1 or 2, wherein the length of the portion (120) of the light mixing is performed so as to provide the ability to adjust the uniformity of color of light of a predefined color.

5. Light-emitting device according to any� PP. 1 or 2, wherein at least a sub-region (120A) of the surface portion (120) of the light mixing is performed with the optical microstructure to enhance the mixing of light in the mixing of light.

6. Light-emitting device according to any one of claims. 1 or 2, which referred to the lighting unit (101) further comprises at least one collimating element.

7. Light-emitting device according to any one of claims. 1 or 2, wherein the peripheral surface (115) of the output light is curved.

8. Light-emitting device according to any one of claims. 1 or 2, wherein the peripheral surface (115, 215) of the output light is at least partially linked with additional surface structure.

9. Light-emitting device according to claim 8, in which the additional surface structure represents one of the refracting patterns, holographic patterns, thin coating particles and rough surfaces.

10. Light-emitting device according to any one of claims. 1 or 2, which referred to the lighting unit (101) further comprises a reflector (103).

11. Light-emitting device according to any one of claims. 1 or 2, further adapted to embed into the lighting device using an incandescent light source.

12. Light-emitting device according to any one of claims. 1 or 2, in which the mentioned at least one �source (102) of light is led.

13. A lighting device comprising at least one light emitting device (100) according to any of claims. 1-12.



 

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Lighting unit // 2538783

FIELD: electricity.

SUBSTANCE: lighting unit intended for lighting of large surfaces contains a carrier (11) with several light-emitting diodes (LEDs) (13) fixed in two-dimensional configuration. Between the LEDs at the carrier there are several fixed reflective elements (17), which are connected through the carrier to LEDs with provision of thermal conductivity so that the reflective elements serve a cooling device for LEDs; the reflective elements are made of metal or plastic with metal coating. The lighting device has several lighting units installed close to each other in the same direction or two mutually perpendicular directions. Modular system of the lighting unit includes the carrier and different sets of reflective elements.

EFFECT: reducing power consumption.

33 cl, 10 dwg

FIELD: electricity.

SUBSTANCE: invention relates to lighting engineering. The housing contains a transmitting part containing a transmitting ceramic material and designed with a possibility of a transmitting, at least, a part of light from the light source or, at least, a part of light of the luminescent material, and a reflecting part, where the reflecting part contains the ceramic reflecting material and is designed with a possibility of reflecting, at least, a part of light from the light source.

EFFECT: improving efficiency of heat removal, which is attained due to the fact that the lighting fixture comprises a housing containing the light source, preferably LED, and luminescent material.

15 cl, 15 dwg

FIELD: electricity.

SUBSTANCE: invention relates to lighting engineering. The light source (10, 12) contains a light emitter (20) installed inside a transparent external flask (30, 32), comprising the light-emitting device (40) and the transparent internal flask (50), at least, partially enclosing the light-emitting device. The transparent internal flask has a diffuser containing luminescent material intended for transformation of light with the greater wavelength. The diameter (di) of the transparent internal flask is less than the diameter (do) of the transparent external flask. The transparent external flask is connected with the non-transparent base (60) and is fitted with an additional diffuser. The transparent external flask has a centreline (S). The imaginary plane (P) of the base is set, essentially, perpendicularly to the centreline (S) and is intersected with the connection point (C), which is a part of the transparent external flask. The light emitter is arranged inside the transparent external flask at a distance from the imaginary plane of the base far from the base.

EFFECT: improvement of illumination quality at the expense of increase of the profile of spatial radiation of a light source.

19 cl, 8 dwg

FIELD: electricity.

SUBSTANCE: invention is related to the area of light engineering and may be used in lighting facilities combining general and directional lighting. The lighting facility (1) comprises the base (2, 12), a lighting unit (4, 14) that includes a module (6, 16) of directional lighting with LEDs and module (5, 15) of general lighting with organic LEDs, a sensor sensing rotation, motion or position of the lighting unit in regard to the base (2, 12) and the light control processor.

EFFECT: improvement of lighting quality.

9 cl, 6 dwg

FIELD: electricity.

SUBSTANCE: invention relates to lighting engineering. The light assembly (10) used for a lantern (1), in particular, for lighting of roads and/or streets has adjusted light distribution. The light assembly (10) contains at least two light (11, 12) sources or two groups of the light sources, at that each of the above light sources (11, 12) or each of the above groups has individual light distribution performance, at that aggregated light distribution for the light assembly (10) is adjusted by change in light output ratio for at least two above light sources (11, 12) or groups of light sources.

EFFECT: simplifying adjustment of light distribution.

10 cl, 9 dwg

FIELD: electricity.

SUBSTANCE: invention relates to lighting engineering. Lighting device (100) is equipped with light sources (110) having a possibility of light generation, carrier (120) having a possibility of supporting the light sources, and cover (130) enclosing the light sources and the carrier. The cover consists of at least two enclosing parts, which together form a cover at their connection; the carrier divides the space defined by the cover at least into two compartments, and the light sources are located on each side of the carrier. The method involves stages of installation (4100) of the light sources that are in thermal contact with the carrier and enclosure (4200) of the light sources and the carrier with the cover; the carrier is arranged in thermal contact with at least one of the enclosing parts for heat scattering to the outside from the lighting device.

EFFECT: simpler assembly and improvement of heat transfer.

15 cl, 6 dwg

FIELD: electricity.

SUBSTANCE: invention relates to lighting engineering. Spot lighting system (1, 30, 40, 60, 70, 90) contains a tubular reflecting element (3,31,61,91) with reflecting inner surface having input (9) and output (10) apertures, at that output aperture is more than input aperture, and a group of light sources (2, 33, 41, 63, 71, 93) comprising a plenty of light sources placed in configuration of the physical light sources in order to emit light to tubular reflecting element at its input aperture. The tubular reflecting element (3, 31, 61, 91) comprises an odd number of reflecting surfaces (14a-g) more than 3, and each surface is made to generate the primary inverted image of the group of light sources, at that the primary inverted image has configuration of primary inverted image of light sources, and at that the group of light sources (2, 33, 41, 63, 71, 93) is made so that for each of primary inverted image at least half of all secondary inverted images of the light sources being result of the primary inverted image reflection by the reflecting surfaces (14a-g) demonstrates configurations of the secondary inverted images of the light sources, which are different from configuration of physical light sources.

EFFECT: improving homogeneity of emitted light.

14 cl, 9 dwg

FIELD: physics.

SUBSTANCE: fluorescent tube fitting device has a light-emitting diode element (4) which includes at least one electric starter element (4.1) connected to at least one phase conductor and also connected to at least one neutral wire at least through one conductor (4.2) having at least one light-emitting diode (4.3).

EFFECT: reduced need to replace fluorescent tubes in fittings and reduced electrical power consumption.

3 cl, 2 dwg

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