Classifications

• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F21—LIGHTING
  • F21K—NON-ELECTRIC LIGHT SOURCES USING LUMINESCENCE; LIGHT SOURCES USING ELECTROCHEMILUMINESCENCE; LIGHT SOURCES USING CHARGES OF COMBUSTIBLE MATERIAL; LIGHT SOURCES USING SEMICONDUCTOR DEVICES AS LIGHT-GENERATING ELEMENTS; LIGHT SOURCES NOT OTHERWISE PROVIDED FOR
  • F21K9/00—Light sources using semiconductor devices as light-generating elements, e.g. using light-emitting diodes [LED] or lasers
  • F21K9/20—Light sources comprising attachment means
  • F21K9/23—Retrofit light sources for lighting devices with a single fitting for each light source, e.g. for substitution of incandescent lamps with bayonet or threaded fittings
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F21—LIGHTING
  • F21K—NON-ELECTRIC LIGHT SOURCES USING LUMINESCENCE; LIGHT SOURCES USING ELECTROCHEMILUMINESCENCE; LIGHT SOURCES USING CHARGES OF COMBUSTIBLE MATERIAL; LIGHT SOURCES USING SEMICONDUCTOR DEVICES AS LIGHT-GENERATING ELEMENTS; LIGHT SOURCES NOT OTHERWISE PROVIDED FOR
  • F21K9/00—Light sources using semiconductor devices as light-generating elements, e.g. using light-emitting diodes [LED] or lasers
  • F21K9/20—Light sources comprising attachment means
  • F21K9/23—Retrofit light sources for lighting devices with a single fitting for each light source, e.g. for substitution of incandescent lamps with bayonet or threaded fittings
  • F21K9/232—Retrofit light sources for lighting devices with a single fitting for each light source, e.g. for substitution of incandescent lamps with bayonet or threaded fittings specially adapted for generating an essentially omnidirectional light distribution, e.g. with a glass bulb
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F21—LIGHTING
  • F21Y—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21S and F21V, RELATING TO THE FORM OR THE KIND OF THE LIGHT SOURCES OR OF THE COLOUR OF THE LIGHT EMITTED
  • F21Y2103/00—Elongate light sources, e.g. fluorescent tubes
  • F21Y2103/10—Elongate light sources, e.g. fluorescent tubes comprising a linear array of point-like light-generating elements
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F21—LIGHTING
  • F21Y—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21S and F21V, RELATING TO THE FORM OR THE KIND OF THE LIGHT SOURCES OR OF THE COLOUR OF THE LIGHT EMITTED
  • F21Y2103/00—Elongate light sources, e.g. fluorescent tubes
  • F21Y2103/20—Elongate light sources, e.g. fluorescent tubes of polygonal shape, e.g. square or rectangular
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F21—LIGHTING
  • F21Y—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21S and F21V, RELATING TO THE FORM OR THE KIND OF THE LIGHT SOURCES OR OF THE COLOUR OF THE LIGHT EMITTED
  • F21Y2107/00—Light sources with three-dimensionally disposed light-generating elements
  • F21Y2107/70—Light sources with three-dimensionally disposed light-generating elements on flexible or deformable supports or substrates, e.g. for changing the light source into a desired form
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F21—LIGHTING
  • F21Y—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21S and F21V, RELATING TO THE FORM OR THE KIND OF THE LIGHT SOURCES OR OF THE COLOUR OF THE LIGHT EMITTED
  • F21Y2115/00—Light-generating elements of semiconductor light sources
  • F21Y2115/10—Light-emitting diodes [LED]

Definitions

• the present invention generally relates to lighting arrangements comprising one or more light emitting diodes (LEDs).
• LEDs light emitting diodes
• LEDs light emitting diodes
• LEDs provide numerous advantages such as a longer operational life, a reduced power consumption, and an increased efficiency related to the ratio between light energy and heat energy.
• LED-based lighting solutions there is currently a very large interest in lighting devices and/or arrangements (such as lamps) provided with LEDs, and incandescent lamps are rapidly being replaced by LED-based lighting solutions. It is nevertheless appreciated and desired to have retrofit lighting devices (e.g. lamps) which have the look of an incandescent bulb.
• lamps utilizing LED filaments arranged in bulbs similar to those of incandescent lamps are highly appreciated as they are decorative like incandescent lamps while still holding the advantages of LEDs.
• WO 2019/015763 discloses a LED lamp, comprising: a transparent housing having a bulbous shape; a flexible LED filament, mounted in a curved shape inside the transparent housing; a filament holder, mounted on the base part and extending into the transparent housing, the filament holder having a plurality of holding parts which are positioned to hold the flexible LED filament at a plurality of spaced-apart locations along its length and thereby define the curved shape of the flexible LED filament.
• a LED filament is providing LED filament light and comprises a plurality of light emitting diodes (LEDs) arranged in a linear array.
• the LED filament has a length L and a width W, wherein L>5W.
• the LED filament may be arranged in a straight configuration or in a non-straight configuration such as for example a curved configuration, a 2D/3D spiral or a helix.
• the LEDs are arranged on an elongated carrier like for instance a substrate, that may be rigid (made from e.g. a polymer, glass, quartz, metal or sapphire) or flexible (e.g. made of a polymer or metal e.g. a film or foil).
• the carrier comprises a first major surface and an opposite second major surface
• the LEDs are arranged on at least one of these surfaces.
• the carrier may be reflective or light transmissive, such as translucent and preferably transparent.
• the LED filament may comprise an encapsulant at least partly covering at least part of the plurality of LEDs.
• the encapsulant may also at least partly cover at least one of the first major or second major surface.
• the encapsulant may be a polymer material which may be flexible such as for example a silicone. Further, the LEDs may be arranged for emitting LED light e.g. of different colors or spectrums.
• the encapsulant may comprise a luminescent material that is configured to at least partly convert LED light into converted light.
• the luminescent material may be a phosphor such as an inorganic phosphor and/or quantum dots or rods.
• the LED filament may comprise multiple sub-filaments.
• a light emitting diode, LED, filament arrangement comprising at least one LED filament which in turn comprises an array of a plurality of light emitting diodes, LEDs.
• the at least one LED filament is of an elongated shape which extends, at least partially, along an axis, A.
• the LED filament arrangement further comprises a bifurcation from which the at least one LED filament (110) splits into at least two branches of which at least one branch of the LED filament is arranged at an angle with respect to the axis A such that the at least one branch is extending from the elongated body.
• bifurcation is here used in the meaning of fork, embranchment, crotch etc., or any other word for making clear that the LED filament splits into two or more directions in a similar way as the branches in a tree.
• the at least one LED filament comprises an encapsulant integrally enclosing the LED filament including the at least two branches.
• the LEDs in the array are arranged to provide a continuous light distribution over the entire LED filament including the at least two branches. This has the nice effect that in the illumination pattern of the LED filament the branching area shows the same intensity and it is not a dark part of the filament.
• the line of emission of the array of a plurality of LEDs continues through the branches.
• the LED in the filament are for instance all connected in series and that there are only two wires required for driving all the branches of said LED filament arrangement.
• the LEDs in the different branches may be connected in parallel, such that each branch has a separate electrical connection.
• each set of LED filaments comprises at least one LED filament which in turn comprises an array of a plurality of light emitting diodes, LEDs.
• At least one of the LED filaments is of an elongated shape, which at least partially extends along an axis, A.
• the at least one LED filament comprises at least one branch arranged at an angle, a, to the axis, A.
• the first and second aspect of the present invention share a common general inventive concept or idea of providing a LED filament arrangement or device wherein the LED filament(s) are constructed as to form specific structures.
• the LED filament(s) has an elongated shape, extending along an axis A, with at least one branch extending from the axis A.
• the branched LED filament will comprise more than two ends and may for example entail a dichotomized or a trichotomized LED filament.
• the present invention may comprise more complex structures of LED filaments than previously known. The lighting of such a LED filament arrangement may be more dynamic and efficient than other non-branched LED filaments.
• the LED filament arrangement may distribute the light emitted by the LEDs in a specific manner depending on the arrangement of the LED filament.
• the present invention is hereby advantageous in that the LED filament arrangement or device may direct or distribute the light in order to achieve an increased efficiency regarding the light distribution compared to a LED filament unit without branched filaments.
• the present invention is further advantageous in that the branched LED filaments of the LED filament arrangement/device may be conveniently designed to provide a desired lighting distribution in terms of illumination and/or decorative purposes.
• the properties such as the shape and size of the branches of the LED filament(s) may be chosen for different lighting purposes of the LED arrangement/device.
• the present invention is further advantageous in that the LEDs of the LED filament arrangement may emit light from the LED filament and the branch(es) thereof in a continuous line or plane, thereby achieving an even more improved decorative light effect and/or a better mimicking of filaments of conventional lamps/bulbs.
• the LED filament device may comprise combined branched LED filaments which may form relatively complex patterns such as tree-like structures. This may further enhance the lighting efficiency, dynamics and/or decorative aspect of the lighting arrangement.
• the branched LED filament arrangement according to the present invention may be configured in such a way that certain patterns or visual effects are achieved. Specifically, light may be spread more evenly, or intentionally emphasized in certain areas of the LED filament arrangement.
• the LED filament arrangement/device of the present invention furthermore comprises relatively few components.
• the relatively low number of components is advantageous in that the LED filament arrangement or device is relatively inexpensive to fabricate.
• the LED filament arrangement and LED filament device according to the first and the second aspects of the present invention respectively, comprise at least one LED filament.
• the at least one LED filament in its turn, comprises an array of LEDs.
• array it is here meant a linear arrangement or chain of LEDs, or the like, arranged on the LED filament(s).
• the LED filament arrangement according to the first aspect of the present invention comprises at least one branch of the LED filament.
• branch it is here meant a structure, unit, or the like, which is structurally a part of the LED filament.
• the LED filament may comprise a first (principal) portion and a second portion which is arranged at an angle from the first portion, wherein the second portion constitutes a branch.
• the branch may comprise the same or similar components as the LED filament in its entity.
• the branch(es) and the, along the axis A, elongated body of the LED filament may both comprise; LEDs, a carrier substrate onto which the diodes are attached, etc.
• the branch(es) may have different properties than other parts/branches of the LED filament.
• the branch(es) of the LED filament are arranged at an angle a, to the axis A so as to form the LED filament’s branched shape.
• the at least one LED filament comprises a plurality of branches.
• the LED filament may comprise N branches, wherein N is preferably 2-4.
• the LED filament may comprise branches extending from one or more sides of the elongated shape.
• the branches may have various sizes, and/or the branches may be arranged at the same or different angles to the axis A. The present embodiment is advantageous in that an even better mimicking of a conventional filament of a lamp/bulb may be achieved.
• At least a first branch of the plurality of branches of the LED filament has a different length than a second branch of the plurality of branches of the LED filament.
• at least one branch is of a different length than the other branches.
• the present embodiment is advantageous as it further increases alternative formations of branches and LED filaments, thus, also the versatility of the LED filament arrangements.
• This embodiment may further provide a positioning of the LED filament in manners that would be unsuitable, or impossible, with branches of equal length. Further, the lighting dynamics of a branched LED filament with branches of various lengths is understood to be increased.
• the at least one LED filament is Y-shaped.
• the LED filament is dichotomized such that there is one bottom end of the LED filament and two ends on the opposite, top part, of the LED filament.
• the present embodiment is advantageous in that the Y-shape further enhances the light distribution of the LED filament.
• the Y-shaped LED filament may have the advantage of being particularly suited for combinations in the LED filament device as previously described. For example, tree-like structures of the LED filament arrangement are conveniently accomplished, thus increasing the properties of such LED filament arrangements along with ease of production. Further, Y-shaped LED filaments may be advantageous in that a symmetric arrangement of the LED filament arrangement may be realized, resulting in a more even light distribution.
• the at least one LED filament is X-shaped.
• the branched LED filament of the LED filament arrangement comprises four ends configured such that two ends are arranged at the top and two ends are arranged at the bottom.
• the present embodiment is advantageous in that the X- shaped LED filament is more or less symmetrical. This may lead to a scattering of light in a more omnidirectional manner, which may increase the efficiency and enhance the light distribution.
• the X-shaped LED filament may prove advantageous as complex structures with multiple intersections may be achieved in a LED arrangement, further increasing lighting effects and light distribution.
• the LEDs of at least a set of LEDs of the plurality of LEDs in the LED filament are connected in series.
• the present embodiment is advantageous as specific lighting effects may be accomplished where equal light intensity over a plurality of diodes in a set is conveniently accomplished. Further, the embodiment is advantageous as a serially connected set of diodes may constitute a certain part, such as a branch, of the LED filament. This could further enhance the possibility of creating specific light scattering arrangements, for example increasing dynamics. Furthermore, this could enhance simplicity in production, and thereby reduce economic costs.
• the LEDs of at least a first set of LEDs of the plurality of LEDs and the LEDs of at least a second set of LEDs of the plurality of LEDs in the LED filament are connected in parallel.
• some LEDs of the plurality of LEDs are arranged in parallel connection, whilst other may be in serial connection.
• One embodiment could see the LEDs in certain branches of the LED filament to be arranged in parallel whilst the other LEDs in the LED filament may be comprised in a different fashion.
• the present embodiment is advantageous as lighting arrangements with different properties within a LED filament may be achieved in a cost efficient and easy-to-produce manner. Further, the parallel connection of LEDs may prove a more sustainable embodiment due to an increased durability.
• the LEDs of at least a first set of LEDs of the plurality of LEDs and the LEDs of at least a second set of LEDs of the plurality of LEDs are configured to emit light with at least one of the same color temperature and the same luminous intensity.
• the color temperature, or the luminous intensity or both color the temperature and luminous intensity may be of the same intensity for multiple LEDs in the LED filament arrangement.
• the present embodiment is advantageous in that the LED filament arrangement provides an efficient solution for an even distribution of light.
• set of LEDs it is here meant a plurality of LEDs which are adjacent each other and interconnected with a wiring.
• the LEDs of one branch of the LED filament may comprise a set of LEDs, whilst the LEDs in a second branch may comprise a different set of LEDs.
• the LEDs of at least a first set of LEDs of the plurality of LEDs and the LEDs of at least a second set of LEDs of the plurality of LEDs are configured to emit light with at least one of a different color temperature and different luminous intensity.
• LED filaments of different color temperatures or luminous intensity may be an aesthetically pleasing effect, which is often desirable.
• This embodiment is further beneficial as one LED filament may comprise branches with different color temperatures, meaning that there would be no need for multiple filaments to achieve the desired decorative effect. This is beneficial as the embodiment of the LED filament arrangement may thus be smaller, more energy efficient and cheaper to produce.
• the LED filament comprises an encapsulant, at least partially enclosing the plurality of LEDs.
• the encapsulant may comprise a luminescent material and may be configured to at least partly convert the light emitted by the plurality of LEDs.
• the encapsulant may be configured to at least partly convert the light emitted by the plurality of LEDs into converted light.
• encapsulant it is here meant a material, element, arrangement, or the like, which is configured or arranged to surround, encapsulate and/or enclose the plurality of LEDs of the LED filament(s).
• the luminescent material of the encapsulant is configured to emit light under external energy excitation.
• the luminescent material may comprise a fluorescent material.
• the luminescent material may comprise an inorganic phosphor, an organic phosphor and/or quantum dots/rods.
• the encapsulant is configured to at least partly convert the light emitted by the plurality of LEDs into converted light.
• a UV/blue LED light may be partially or fully absorbed by the luminescent material and converted to light of another color e.g. green, yellow, orange and/or red.
• the encapsulant of the LED filament is used with blue and/or UV LEDs.
• the encapsulant may comprise a light scattering material to scatter the light of the (RGB) LEDs.
• the light scattering material may comprise light scattering particles such as e.g. BaSCL, AI2O3 and/or TiCh particles.
• the encapsulant e.g. comprising a luminescent material and/or light scattering material, may be arranged in a continuous profile on the LED filament and branch(es) thereof, thereby obtaining an improved decorative lighting effect and/or a better mimicking of a filament of a conventional lamp/bulb.
• the angle, a, between the at least one branch and the axis, A, of the LED filament is within the range of 10-80 degrees (preferred), such as 20-60 degrees (more preferred), and such as 30-50 degrees (most preferred).
• the present embodiment is advantageous in that the exemplified angle(s) between the branch(es) and the LED filament axis, A, are preferred at least from an aesthetical perspective.
• each branch of the least one branch is arranged at an angle, a, to the axis, A, which is at least 90 degrees.
• a LED filament unit comprising a plurality of LED filament arrangements.
• the plurality of LED filament arrangements is coupled such that at least a first LED filament of the plurality of LED filament arrangements is in physical contact with at least a second LED filament of the plurality of LED filament arrangements.
• one or more first LED filament(s) is(are) connected, e.g. via one or more electrical contacts, to one or more second LED filament(s).
• the LED filament unit may increase intended areas of use, as specific light scattering effects may be achieved.
• the physical contact between the LED filaments may also include electrical contact between the LED filaments.
• the LED filament arrangements in the LED filament unit may be coupled as to form structures where each individual LED filament arrangement does not need to be attached to electrodes other than those of another LED filament. This is advantageous as it may offer easier and less resource demanding LED filament units.
• the LED filament device comprises at least a first branch which is of a different length than at least a second branch of the LED filament device. According to an alternative embodiment of the present invention, the LED filament device comprises at least a first branch which is of the same length as at least a second branch of the LED filament device.
• the variations of the LED filament devices mentioned may be useful as to create further aesthetically pleasing structures, where the length relation of the branches is selected to best accommodate a specific lighting purpose, with different structures and lighting effects obtainable. This is advantageous as the LED filament device easily can be produced for a plurality of varying needs, with relatively few alterations, thus reducing production costs. Additionally, the LED filament device may have the advantage of being more durable than other complex structures used to replace incandescent lamps.
• Fig. 1 schematically shows a LED filament arrangement according to an exemplifying embodiment of the present invention
• Figs. 2 a-b schematically show a LED filament arrangement according to an exemplifying embodiment of the present invention
• Figs. 3a-b schematically show a cross-sectional view of a LED filament arrangement according to an exemplifying embodiment of the present invention
• Fig. 4 schematically shows a LED filament arrangement according to exemplifying embodiments of the present invention
• Fig. 5 schematically shows a LED filament unit according to exemplifying embodiments of the present invention
• Figs. 6a-c schematically shows a LED filament device according to an exemplifying embodiment of the present invention.
• FIG. 1 shows a schematic view of a LED filament arrangement 100 according to an exemplifying embodiment of the present invention.
• the LED filament arrangement 100 comprises a LED filament 110 elongated along an axis A. Further, the LED filament 110 also comprises branches two 120, 121 extending at the bifurcation from the elongated LED filament 110. It should be noted that the number of branches of the LED filament 110 is arbitrary, and that the two branches 120, 121 are shown as an example.
• the branch 120 of the LED filament 110 is extending from the axis A at an angle a.
• the angle a may preferably be within the range of 10-80 degrees, preferably 20-60 degrees, and most preferably 30-50 degrees.
• the LED filament 110 in the present embodiment comprises two branches 120, 121, extending in similar angles from the axis a. However, branches 120, 121 of the LED filament 110 may comprise different angles a and an asymmetrical shape may thus be achieved.
• the LED filament arrangement 100 comprises a plurality of LEDs (not shown), which may be attached to a carrier.
• the carrier may be a substrate which may be flexible or rigid.
• the LED filament 110 further comprises an encapsulant comprising a translucent material, wherein the encapsulant at least partially encloses the plurality of LEDs.
• the encapsulant may fully enclose the plurality of LEDs, that is including the part of the bifurcation.
• the encapsulant is preferably a polymer material, for example made of silicon.
• the LEDs may be direct emitting LEDs which provide a color.
• the LEDs may be RGB, UV or blue LEDs. Further combinations of LEDs, e.g. UV LEDs and blue light LEDs, may be used.
• the LEDs may also comprise laser diodes.
• the color temperature of the white light is preferably in the range of 1800 to 6000 K, more preferably in the range from 2000 to 5000 K, most preferably in the range from 2200 to 4000 K such as for example 2300 K or 2700 K.
• the white light has preferably a CRI of at least 75, more preferably at least 80, most preferably at least 85 such as for example 90 or 92.
• the encapsulant of the LED filament 110 may comprise a luminescent material, which is configured to emit light under external energy excitation.
• the UV/blue LED light may be partially or fully absorbed by the luminescent material and converted to light of another color e.g. green, yellow, orange and/or red.
• the luminescent material may for example comprise; inorganic phosphor, organic phosphor and/or quantum dots/rods.
• Figures 2a and 2b shows further embodiments of LED filament arrangements 100.
• the LED filament arrangement 100 of figures 2a and 2b may be similarly configured as the LED filament arrangement 100 described in connection with Figure 1, and it is referred to Figure 1 for an increased understanding.
• Figure 2a displays a Y- shaped LED filament arrangement 100
• Figure 2b displays an X-shaped LED filament arrangement 100 (although not shown, the LED filament arrangement 100 may alternatively have a K-shape).
• the LED filaments 110 illustrated in Figures 2a and 2b represents embodiments in which a plurality of branches are provided. As seen, the LED filaments 110 may comprise a different number of branches 120, 121.
• the branches 120, 121 of a LED filament 110 may, for example, be directed in different angles and directions, and may be of different lengths.
• the Y-shaped LED filament 110 may comprise branches 120, 121 of equal or unequal length, while still maintaining a Y-shape.
• a symmetrical LED filament 110 of an X-shape is provided such that a plurality of end portions in both the top and bottom of the LED filament 110 is achieved.
• the X-shaped LED filament 110 comprises four branches 120, 121, 122,
• the X-shaped LED filament 110 could also be asymmetric in the same manner as the Y-shaped LED filament 110 discussed in regard to figure 2a.
• Figures 3a and 3b schematically show cross sections of a LED filament 110 of the LED filament arrangement 100, comprising an array or “chain” of LEDs 130.
• the LEDs are arranged in the LED filament arrangement 100 such that the line of emission of the array of a plurality of LEDs continues through the branches.
• the array of LEDs 130 may comprise a plurality of adjacently arranged LEDs 130 wherein a respective wiring is provided between each pair of LEDs 130.
• Figure 3a displays an embodiment in which all LEDs 130 are connected in series.
• Figure 3b displays an embodiment of a LED filament arrangement 100 comprising two branches 120, 121.
• a plurality of the LEDs, among the array of LEDs 130, may be further defined as a set of LEDs 131, 132, 133.
• the LED filament 110 comprises individual sets of LEDs 131, 132, where the sets of LEDs 131, 132 are connected in parallel.
• the set of LEDs 133 of the unbranched portion of the LED filament 110 is connected in series with the sets of LEDs 131,132 of the branches.
• LED filament may for example cause different sections of the LED filament arrangement 100 to be of different luminous intensity.
• Figure 4 shows an embodiment of a LED filament arrangement 100 in which one portion 105 of the LED filament 110 is of a different color temperature, or a different luminous intensity, than the branches 120, 121 of the LED filament 110. It is understood that other sections or combinations of sections of the LED filament 110 may be arranged for having different color temperature, or luminous intensity. For example, different colors (temperatures) may be obtained by using LEDs emitting different colors and/or using different luminescent materials (e.g. phosphors such as a red phosphor or the combination of a yellow and red phosphor) in different parts of the LED filament arrangement 100, e.g. in an encapsulant of the LED filament 110.
• different luminescent materials e.g. phosphors such as a red phosphor or the combination of a yellow and red phosphor
• Figure 5 displays a schematic representation of an embodiment of a LED filament unit 140.
• the LED filament unit 140 may comprise two LED filament arrangements 100, 101, which are in physical, and electrical, connection. In this exemplified illustration, two end portions of the LED filaments 100, 101 are in contact, but other configurations are also possible.
• the LED filament unit 140 may comprise any plurality of LED filament arrangements 100, 101.
• the LED filaments 100,101 may be arranged in any desirable manner in which at least one LED filament arrangement 100 is in physical contact with at least one other LED filament arrangement 101.
• FIGS. 6a, 6b and 6c schematically show a LED filament device 150 which comprises n sets of LED filaments 160.
• each set of LED filaments 160 comprises at least one branched LED filament 110.
• this iterative structure forms a tree-like shape where each branch of a branched LED filament 110 is further branched into new LED filaments 110, and so on.
• the length L of the LED filament 110 which extends along an axis A may be of varying length. In the embodiment displayed in Figure 6a, the length L is decreased for each set of LED filaments 160 in the tree-like shape of the LED filament device 150.
• the length L is preferably in the range from 2 cm to 10 cm.
• Figure 6b schematically shows a similar LED filament device wherein the length L is the same for each set of LED filaments 160 of the tree-like structure.
• Figure 6c schematically shows a similar LED filament device wherein the length L is increasing for each set of LED filaments 160 of the tree-like structure.
• the length L may thus be utilized to create numerous shapes and structures, exemplified in figures 6a, 6b and 6c.

Landscapes

• Engineering & Computer Science (AREA)
• Physics & Mathematics (AREA)
• Microelectronics & Electronic Packaging (AREA)
• Optics & Photonics (AREA)
• General Engineering & Computer Science (AREA)
• Non-Portable Lighting Devices Or Systems Thereof (AREA)

Priority Applications (5)

Applications Claiming Priority (2)

Related Child Applications (2)

Publications (1)

Family

ID=68426081

Family Applications (1)

Country Status (5)

Citations (7)

Family Cites Families (20)

• 2020
  • 2020-10-21 CN CN202080076751.5A patent/CN114630986B/zh active Active
  • 2020-10-21 EP EP20793700.4A patent/EP4051949A1/en active Pending
  • 2020-10-21 WO PCT/EP2020/079635 patent/WO2021083765A1/en not_active Ceased
  • 2020-10-21 JP JP2022523731A patent/JP7717692B2/ja active Active
  • 2020-10-21 US US17/770,670 patent/US12264787B2/en active Active
• 2025
  • 2025-02-28 US US19/067,571 patent/US20250198573A1/en active Pending

Patent Citations (7)

Also Published As

Similar Documents

Legal Events