Lamp comprising filament element

Abstract

A lamp comprising a plurality of filament elements configured to generate light is provided. The plurality of filament elements are connected to a single mounting element configured to connect the lamp to the main power outlet such that the plurality of filament elements output light when the lamp is connected to the charged main power outlet. Each filament element includes a single filament and a tube of optically transmissive material. Each single filament includes an elongated light generating portion and at least two electrodes on the elongated light generating portion. The lamp is configured such that the plurality of filament elements extend parallel to an axis of the lamp away from the single mounting element.

Description

Technical Field

[0001] This disclosure relates to the field of lamps, and particularly to lamps including filament elements. Background Technology

[0002] There has been a long-standing desire to improve artificial lighting devices used to provide artificial light in a wide variety of environments, such as homes, industries, and / or public spaces.

[0003] Artificial lighting devices typically consist of one or more lamps (e.g., light bulbs) for emitting light. Traditional lamps include one or more filaments encased in a bulb made of an optically transmissive material such as plastic or glass. Light bulbs are typically oval in shape.

[0004] This type of lamp, designed to retrofit traditional HID lamps, utilizes multiple straight or circularly arranged filaments. The filaments are surrounded or encased within a bulb made of optically transmissive material. The aim is to provide high lumen output through the configuration and arrangement of the filaments.

[0005] The goal is to provide a lamp with improved efficiency and / or lifespan. Utility Model Content

[0006] According to an example of one aspect of this disclosure, a lamp for emitting light of at least 3000 lumens is provided. The lamp includes a single mounting element for connecting the lamp to a main power outlet, an axis of the lamp passing through the single mounting element, and a plurality of filament elements supported by the single mounting element. Each filament element includes a single filament configured to generate light, the single filament extending in a direction away from the single mounting element, wherein the single filament includes an elongated light-generating portion and at least two electrodes on the elongated light-generating portion, and a tube of optically transmissive material completely covering the elongated light-generating portion of the single filament. The lamp is configured such that, when the single mounting element is connected to the main power outlet, the plurality of filament elements extend parallel to the axis of the lamp.

[0007] This disclosure provides a lamp comprising a plurality of filaments extending outwardly from a single mounting element. Each filament is wrapped or enclosed in a tube. Each tube is optically transmissive (e.g., translucent or transparent) to allow light generated by elongated light-generating portions of the filaments to escape.

[0008] Compared to lamps that use a single sheet of optically transmissive material to surround more than one filament, the proposed method improves heat dissipation. This, in turn, increases the lamp's lifespan. Using multiple filaments helps to provide lamps capable of meeting high lumen requirements.

[0009] A single mounting element is designed to connect the light to the main power outlet. Therefore, the light is structurally supported only via this single mounting element. In other words, the light is connected to only one outlet via a single mounting element (e.g., not including any other mounting elements for connecting to any other outlet).

[0010] For each filament element, the tube can be filled with inert gas.

[0011] Each filament element preferably comprises a single LED filament. A single LED filament may include a string of blue or white LED chips mounted on an elongated substrate. At least one or more of the light-emitting surfaces of the LED chip string may be encapsulated with a fluorescent material; for example, the entire single filament may be encapsulated with a fluorescent material.

[0012] By employing multiple filament elements, this lamp exhibits improved heat dissipation compared to lamps where multiple filaments are surrounded by a single sheet of optically transmissive material, thereby extending the lamp's lifespan. Using multiple filament elements also helps to provide lamps capable of meeting high lumen requirements.

[0013] The lamp may also include a support, which comprises a cover portion and a base engagement portion. The cover portion may be configured to engage with a plurality of filament elements, wherein each filament element engages with a single mounting element at a first end of the plurality of filament elements and with the cover portion at a second end of the plurality of filament elements (the second end being different from the first end). The base engagement portion may be configured to structurally engage the cover portion to the single mounting element. In this way, the filament elements are structurally supported between two rigid portions of the lamp.

[0014] The bracket can also be configured to be releasably attached to a single mounting element. This allows access to multiple filament elements.

[0015] Each filament element can be configured such that at least two electrodes are located at the first end of the elongated light-generating portion. In some examples, each filament element is electrically connected to the rest of the lamp only via these at least two electrodes.

[0016] Alternatively, each filament element can be configured such that at least two electrodes are distributed between a first end and a second end of an elongated light-generating portion, the second end being different from the first end. In this example, each filament element can be electrically connected to the rest of the lamp only via at least two electrodes. In this way, different filament element designs can be used depending on assembly requirements.

[0017] In this example, the electrical connection can be configured to be connected to one or more electrodes at the second end of the elongated light-generating portion, wherein the electrical connection passes through the base engagement portion.

[0018] Each filament element can be configured such that two or more electrodes pass through a tube, which is sealed to surround an elongated light-generating portion, and the electrodes are secured to the tube by compression. In this way, the tube can be filled with an inert gas to enhance the heat dissipation of the individual filaments.

[0019] The elongated light-generating portion of each filament element can be an LED filament. The LED filament may include an elongated substrate and a string of LED chips mounted on a first surface of the elongated substrate. To maximize luminous efficiency, each filament element (including the LED filament) can be arranged inside the lamp such that the first surface of the elongated substrate faces the outside of the lamp.

[0020] The lamp may also include a printed circuit board, wherein individual filaments of each filament element (e.g., at least two electrodes of a single filament) are soldered to the printed circuit board. In the case where at least two electrodes are distributed between a first end and a second end of an elongated light-generating portion, the lamp may include a second printed circuit board. In this case, the lamp may also include an electrical connection connecting the first and second printed circuit boards, wherein the electrical connection passes through a base engagement portion (if present).

[0021] The lamp may also include one or more electrical components. These components may be positioned within a single mounting element and / or within a volume defined by multiple filament elements. The electrical components may include a drive circuit system for the multiple filament elements. These components may also include one or more sensors and / or communication circuitry. In this way, the brightness and / or color of the output light from the filaments can be controlled.

[0022] The lamp can be configured such that multiple filament elements are arranged in a circle around the lamp's axis.

[0023] The lamp can be configured to include at least four filament elements, such as six filament elements, eight filament elements, etc.

[0024] These and other aspects of this disclosure will be apparent from the embodiments described below, and will be set forth with reference to the embodiments described below. Attached Figure Description

[0025] To better understand this disclosure, and to more clearly illustrate how to implement it, reference is now made to the accompanying drawings by way of example only, in which:

[0026] Figure 1 A perspective view of the lamp is provided;

[0027] Figure 2 The illustration shows a single filament element of a lamp;

[0028] Figure 3 The illustration shows a single filament element of a lamp;

[0029] Figure 4 A cross-sectional view of an example LED filament is provided;

[0030] Figure 5 Another example cross-sectional view of an LED filament is provided;

[0031] Figure 6 Another example cross-sectional view of an LED filament is provided;

[0032] Figure 7 An exploded view of the lamp is provided;

[0033] Figure 8 A cross-sectional view of the lamp is provided;

[0034] Figure 9 A cross-sectional view of another lamp is provided;

[0035] Figure 10 Another cross-sectional view of the lamp is provided;

[0036] Figure 11 Another perspective view of the light is provided;

[0037] Figure 12 Another perspective view of the light is provided. Detailed Implementation

[0038] This disclosure will be described with reference to the accompanying drawings.

[0039] It should be understood that while the detailed description and specific examples indicate exemplary embodiments of the apparatus, system, and method, they are intended for illustrative purposes only and not to limit the scope of this disclosure. These and other features, aspects, and advantages of the apparatus, system, and method of this disclosure will be better understood from the following description, the appended claims, and the accompanying drawings. It should be understood that the drawings are merely schematic and not drawn to scale. It should also be understood that the same reference numerals are used throughout the drawings to denote the same or similar parts.

[0040] A lamp comprising a plurality of filament elements configured to generate light is proposed. The plurality of filament elements are connected to a single mounting element configured to connect the lamp to a main power outlet such that when the lamp is connected to a energized main power outlet, the plurality of filament elements output light. Each filament element includes a single filament and a tube of optically transmissive material. Each single filament includes an elongated light-generating portion and at least two electrodes on the elongated light-generating portion. The lamp is configured such that the plurality of filament elements extend parallel to the axis of the lamp away from the single mounting element.

[0041] Figure 1A perspective view of the proposed lamp 100 is shown. The lamp includes a single mounting element 110 and multiple filament elements 120.

[0042] A single mounting element 110 is designed to connect the lamp 100 to the main power outlet. Figure 1 (Not visible in the image). A single mounting element 110 is configured to electrically connect the lamp 100 to the mains power supply when connected to a socket. The single mounting element 110 also provides structural support for the rest of the lamp 100. Therefore, the lamp 100 is structurally supported only via a single mounting element. In other words, the lamp 100 is connected to only a single socket via a single mounting element 110, for example, and does not include any other mounting elements for connecting to any other socket.

[0043] Multiple filament elements 120 are designed to output light when the lamp 100 is connected to and powered by a main power socket via a single mounting element 110. The multiple filament elements 120 are configured to output light via a single mounting element 110 and an internal circuitry (…). Figure 1 (Not visible in the center) Receives electrical power from the main power supply. A plurality of filament elements 120 are configured such that, when a single mounting element 110 is connected to the main power socket, the plurality of filament elements 120 extend parallel to the axis Y1. In the illustrated example, the plurality of filament elements 120 are arranged in a circle about the axis Y1, such that each filament element is equidistant from adjacent filament elements, and the end of each filament element lies on a single circular path. The axis Y1 may pass through the center of the lamp 100.

[0044] The plurality of filament elements 120 may include not less than 4 filament elements, for example not less than 6 filament elements, for example not less than 8 filament elements, for example not less than 10 filament elements.

[0045] In some examples, lamp 100 (of multiple filament elements 120) is configured to emit light of not less than 3,000 lumens when energized.

[0046] In the illustrated example, a single mounting element 110 includes a base 140 for engaging with a plurality of filament elements 120 and a lamp holder 150 to be inserted into a main power socket. The base 140 is configured to engage or connect with the plurality of filament elements 120 at a first end 191 of the plurality of filament elements.

[0047] In the illustrated example, lamp 100 also includes a bracket 130 for providing additional structural support for the plurality of filament elements 120. The bracket 130 is configured to engage the plurality of filament elements 120 at a second end 192 (i.e., the end furthest from the individual mounting element 110), which is different from the first end 191. The bracket 130 is configured to engage the individual mounting element 110 at a point along an axis Y1 defined by the plurality of filament elements 120. As illustrated later, the bracket 130 may be omitted in some variations.

[0048] exist Figure 2 The illustration shows an example of a single filament element 200 among a plurality of filament elements 120. The filament element 200 is shown in perspective view 201 and cross-sectional view 202. Each filament element 200 includes a single filament 210 configured to generate light and a tube 220 of an optically transmitting material (such as plastic or glass).

[0049] A single filament 210 includes an elongated light-generating portion 211 and at least two electrodes 212 on the elongated light-generating portion 211. The single filament is configured to output light when the lamp 100 is connected to and powered by a main power socket via a single mounting element 110.

[0050] At least two electrodes 212 are connected to and electrically contact the elongated light-generating portion 211. The at least two electrodes are configured to electrically connect the elongated light-generating portion to the rest of the lamp 100. Each filament element 200 is configured such that it is electrically connected to the rest of the lamp 100 only via the at least two electrodes 212.

[0051] Tube 220 is a straight tube / tube that completely covers the elongated light-generating portion 211. The two ends of tube 220 are sealed by “squeezing or pinching” (defined as tube narrowing), in which the inner surfaces of the tube are brought together to contact themselves. This squeezing can be achieved during manufacturing by flattening the tube while the tube material is in a plastic state (e.g., by heating the tube). Tube 220 is configured to surround the elongated light-generating portion 211 and to attach at least two electrodes 212 to tube 220.

[0052] For each filament element 200, tube 220 may be filled with an inert gas, preferably helium, or alternatively nitrogen, argon, or a mixture of gases.

[0053] The elongated light-generating portion 211 can be defined as having a first end 213 and a second end 214.

[0054] for Figure 2The illustrated filament element, each filament element 200, can be configured such that at least two electrodes 212 are located on the first end 213 of the elongated light-generating portion 211.

[0055] exist Figure 3 Another example of a single filament element 200 of a plurality of filament elements 120 is shown.

[0056] Figure 3 The illustrated filament element 200 is similar to the previous one (in... Figure 2 The difference between the filament element 200 described in the Chinese version is that at least two electrodes 212 are distributed between the first end 213 and the second end 214 of the elongated light-generating portion 211.

[0057] The elongated light-generating portion 211 of each filament element 200 can be an LED filament. Figures 4 to 6 Each example shows a cross-sectional view of an LED filament.

[0058] In the illustrated example, the LED filament includes a string 251 of LED chips (for emitting light) mounted on an elongated substrate 252. The string of LED chips is mounted on a first side 253 of the elongated substrate 252 (the first side 253 is opposite to the second side 254).

[0059] The LED chip string may include a string of blue LED chips mounted on an elongated substrate 252. Alternatively, the LED chip string 251 may include strings of LED chips for emitting different colors (e.g., RGB (red, green, or blue) or other colors). The different colored LED chips may be in a single string or in different strings (not shown), for example, each color may have a different string, wherein such a single string or different strings are mounted on a single elongated substrate (e.g., elongated substrate 252).

[0060] The elongated substrate 252 can be made of an insulating material. In addition, the elongated substrate 252 can be optically transmissive (e.g., translucent or transparent).

[0061] For a filament element including an LED filament, there exists a principal direction 255, or main direction, which points away from the first surface 253, and light is preferentially emitted from the filament element towards this principal direction. More specifically, when an LED chip string is mounted on the first surface 253 of an elongated substrate 252, most of the light emitted by the LED filament (i.e., greater than 50%) leaves the filament element at an angle of less than 90° to the principal direction 255. This is because reflection from the elongated substrate causes the light to preferentially travel away from the first surface 253.

[0062] To improve luminous efficiency, each of the plurality of filament elements 120 (including LED filaments) can be arranged within the lamp 100 such that the main direction 255 is configured to point outwards from the lamp 100. In other words, the first surface 253 of the elongated substrate 252 on which the LED chip string 251 is mounted can face outwards from the lamp. In this way, the light emission of the lamp can be maximized.

[0063] Optionally, the LED filament may also include a phosphor coating 256, for example, when the LED chip string 251 includes a blue LED chip string. The phosphor coating may be configured to at least encapsulate the light-generating portion of the LED chip string 251.

[0064] Figures 4 to 6 Different configurations of the fluorescent coating 256 are shown.

[0065] exist Figure 4 In this process, a fluorescent coating 256 is provided on the first surface 253 and completely encapsulates the LED chip string 251 (but not the entire first surface 253).

[0066] exist Figure 5 In this process, a fluorescent coating 256 is provided on a first surface 253 and a second surface 254. The fluorescent coating 256 provided on the first surface 253 completely encapsulates the LED chip string 251 (but not the entire first surface 253).

[0067] exist Figure 6 In the middle, the fluorescent coating completely encapsulates the entire LED chip string 251 and the slender substrate 252, that is, the entire LED filament is encapsulated by the fluorescent coating 256.

[0068] Figure 7 An exploded view of lamp 100 is shown, which helps to demonstrate more optional components, functions, and features of lamp 100.

[0069] In the illustrated example, the base 140 includes an element array 141 comprising a plurality of holes, the number of which is not less than the number of filament elements 120. Thus, each hole is configured to receive a corresponding filament element therein. Each of the plurality of holes is configured with a shape for each filament element 200, i.e., having a geometry complementary to that of the corresponding filament element, to receive the corresponding filament element therein. For example, according to... Figure 7 In the illustrated example, the opening of each hole can be circular to match the cylindrical shape of each filament element 200. In other words, the cross-section of the hole in a first plane perpendicular to the axis Y1 can be equal to the cross-section of the filament element in a second plane parallel to the first plane.

[0070] Each filament element 200 can be inserted into a corresponding hole in a plurality of holes in the element array 141. In this way, a plurality of filaments 120 can be engaged with the base 140 by inserting a plurality of filaments into a plurality of holes in the element array 141.

[0071] The multiple holes of the component array 141 can be arranged in a circular pattern. For example, the multiple holes can be arranged as a single circular hole array, wherein the holes are arranged in a single circular pattern (such as...). Figure 7 As illustrated, for example, each hole is equidistant from the axis Y1 and lies in the same plane. Alternatively, the element array 141 may include a multi-circular hole array, wherein the holes are arranged in two or more concentric circular patterns, for example, such that each hole in the same circular pattern is equidistant from the axis Y1, and the holes in different circular patterns have different distances from the axis Y1. Obviously, the holes located in the same circular pattern lie in substantially the same plane.

[0072] It will be understood that a circular arrangement of holes is not required, and the element array 141 may include any other possible pattern or arrangement for the hole array.

[0073] In the illustrated example, the base 140 also includes an elongated portion 142 extending along axis Y1 and surrounded by a plurality of filament elements 120. For example, the elongated portion may be used to: cover an internal circuitry positioned within the volume defined by the plurality of filament elements; and / or provide a reflective surface for reflecting light emitted by each filament element. Other possible functions of the elongated portion will be provided later in this disclosure.

[0074] In the illustrated example, the bracket 130 includes a cover portion 131 and a base engagement portion 132.

[0075] The cap portion 131 is configured to engage with a plurality of filament elements 120 at a second end 192 (i.e., the end furthest from the individual mounting element 110), such that the plurality of filament elements 120 are structurally supported (e.g., clamped) between the cap portion 131 and the element array 141.

[0076] The base engagement portion 132 extends along axis Y1 and is configured to engage with the base 140 (e.g., the elongated portion 142 of the base 140) via screws 133 or other fastening mechanisms (e.g., clamping mechanisms or adhesives). The use of screws 133 is particularly advantageous because it allows multiple filament elements 120 to be structurally supported between the base 140 and the bracket 130, while also allowing the bracket 130 to be removed from the rest of the lamp 100 to allow access to the individual filament elements.

[0077] In the illustrated example, the lamp holder 150 includes an inner portion 151 and an outer portion 152.

[0078] The internal portion 151 is a tube, and the internal portion 151 is configured to engage with the base 140 at the open end of the tube. The volume defined by the internal portion 151 (i.e., its interior) may contain a certain amount of circuitry and / or electrical components.

[0079] The outer portion 152 is a tube with a closed end, configured to engage with the inner portion 151 at the end opposite the end that engages with the base 140. The outer portion 152 acts as an adapter between the single mounting element 110 and the main power outlet. For example, the outer portion may be an Edison (screw) E27 lamp holder, an E14 lamp holder, a socket-type B22 lamp holder, or other lamp holders. Further details regarding examples of lamp holders suitable for lamps are explained in International Electrotechnical Commission IEC 60061-1 or ANSI standard ANSI C81.61.

[0080] The inner portion 151 may be made of an insulating material (e.g., plastic) and may serve to electrically isolate the electrical components housed within the inner portion 151 from the outer portion 152. The outer portion 152 may be electrically connected to the rest of the lamp 100 via electrical connections permitted by the inner portion 151.

[0081] In the illustrated example, lamp 100 also includes a printed circuit board 310 and one or more electrical components 320 in electrical contact with the printed circuit board 310. The printed circuit board is configured to be electrically connected to a plurality of filament elements 120 via at least two electrodes 212. This electrical connection can be formed, for example, by soldering, spring-loaded pin contact, or any other connection method. The printed circuit board 320 is also configured to be electrically connected to a single mounting element 110 to receive electrical power when lamp 100 is connected to a mains power outlet.

[0082] The printed circuit board 310 and / or one or more electrical components 320 may be (at least partially) positioned within a volume defined by a single mounting element 110.

[0083] Figure 8 It shows that according to Figure 1 The illustration shows a perspective cross-sectional view of the example lamp 100.

[0084] In the illustrated example, a plurality of filament elements 120 are structurally supported between a cover portion 131 and an element array 141. A base engagement portion 132 is engaged with an elongated portion 142 via a fixing mechanism 133 (such as a screw 133). The plurality of filament elements 120 are electrically connected to a printed circuit board 310 via at least two electrodes 212 located at a first end 213. The printed circuit board 310 and one or more electrical components 320 are positioned within a volume defined by an internal portion 151.

[0085] The dimensions of lamp 100 in the direction perpendicular to / orthogonal to axis Y1 can be defined by maximum radius R1 and maximum radius R2. Maximum radius R1 is measured from the center of lamp 100 to the outer surface of the plurality of filament elements 120, and maximum radius R2 is measured from the center of lamp 100 to the outer surface of lamp base 150. In other words, R1 and R2 are radial measurements of lamp 100, referring to the filament element portion and the lamp base portion, respectively. The relative ratio of R1 and R2 can be defined such that the maximum radius R1 of lamp 100 does not exceed three times its maximum radius R2.

[0086] Figure 9 A perspective cross-sectional view of another lamp 100 is shown.

[0087] In the illustrated example, each filament element 200 is configured such that at least two electrodes 212 are distributed between a first end 213 and a second end 214 of an elongated light-generating portion 211. Therefore, each filament element is as follows: Figure 3 As illustrated in the figure, an electrode 212 at the first end 213 is connected (at least partially) to a printed circuit board 310 located within the volume defined by a single mounting element 110. An electrode 212 at the second end 214 is connected to a printed circuit board 510 located within the volume defined by a cover portion 131.

[0088] In the illustrated example, for example, through a wire passing through the base engagement portion 132 and / or the elongated portion 142 ( Figure 9 (Not shown in the figure), the printed circuit board 510 can be electrically connected to the printed circuit board 310.

[0089] Figure 10 A perspective cross-sectional view of another lamp 100 is shown.

[0090] In the illustrated example, there is no support 130, and the multiple filament elements 120 are supported solely by the base 140. This is permissible, for example, for a lamp 100 with fewer and / or shorter filament elements that do not require additional structural support from a top cover. This allows for the manufacture of lamps with fewer individual components and reduced manufacturing resources (e.g., power and / or material requirements). Furthermore, the absence of a support 130 allows the elongated portion 142 to occupy a larger portion of the volume defined by the multiple filament elements 120, which in turn provides greater internal space for electrical components, heat dissipation, and / or other applications.

[0091] exist Figure 9 and Figure 10 In the illustrated example, one or more electrical components 320 are positioned within a volume defined by a plurality of filament elements 120.

[0092] By positioning one or more electrical components within a volume defined by a plurality of filament elements 120 (i.e., within the elongated portion 142), the electrical components can be dispersed across a larger volume, thereby improving heat dissipation of the electrical components due to the increased surface area and improving the performance of the lamp 100.

[0093] Another advantage of positioning the electrical components (multiple components) within a volume defined by multiple filament elements is that it keeps the components (multiple components) at a distance from the socket, thereby reducing the risk of parasitic capacitance and / or other electrical characteristics (such as electromagnetic interference) between the components (multiple components) and the main power supply.

[0094] One or more electrical components 320 may include a drive circuit system for a plurality of filament elements 120.

[0095] One or more electrical components 320 may include sensors and / or communication circuitry. By positioning the sensors and / or communication circuitry within the volume defined by the plurality of filament elements 120 (i.e., within the elongated portion 142), shielding / shielding of the input / output signals of the sensors and / or communication circuitry can be reduced, thereby improving their performance. For example, compared to the lamp holder 150, the plurality of filament elements 120 and the elongated portion 142 may be composed primarily of non-metallic materials (e.g., glass and / or plastic), while the lamp holder 150 may have a housing that is primarily metallic. In this example, the shielding effect within the lamp holder (compared to within the volume defined by the plurality of filament elements) will be particularly pronounced.

[0096] One or more electrical components 320 may allow dimming and / or color switching of the output light of the filament 210, which is controlled by sensors and / or manual controllers, for example, positioned on the bracket 130 or on a single mounting element 110.

[0097] Figure 11 A perspective view of another lamp 100 is shown.

[0098] The illustrated example differs from previously disclosed examples in that the bracket 130 includes multiple holes (similar to...). Figure 7 The element array 141). More specifically, the cover portion of the bracket 130 (similar to...) Figure 7 The cover portion 131 includes a plurality of holes, such that each hole is configured to receive a corresponding filament element therein. In this way, by accommodating a portion of the corresponding filament element within the corresponding hole, the support 130 can engage with the plurality of filament elements 120 at the second end 192. This provides an alternative method for structurally supporting the plurality of filament elements 120.

[0099] Figure 12 A perspective view of another lamp 100 is shown.

[0100] The illustrated example differs from the previously disclosed example in that the lamp holder 150 is replaced with a GX24d type insert lamp holder. It is understood that this embodiment is not limited to any particular type of lamp holder and can cover all lamp holder and socket designs according to IEC60061-1 and / or ANSI standards.

[0101] When practicing the claimed utility model, those skilled in the art can understand and implement variations of the disclosed embodiments by studying the accompanying drawings, the disclosure, and the appended claims. In the claims, the word "comprising" does not exclude other elements or steps, and the indefinite articles "a" or "an" do not exclude a plurality.

[0102] The fact that certain measures are described only in mutually different dependent claims does not imply that an advantage cannot be gained by using a combination of these measures.

[0103] If the term "suitable" is used in the claims or description, it should be noted that the term "suitable" is intended to be equivalent to the term "configured as". If the term "apparatus" is used in the claims or description, it should be noted that the term "apparatus" is intended to be equivalent to the term "system", and vice versa.

[0104] Any reference symbols in the claims should not be construed as limiting the scope.

Claims

1. A lamp comprising a filament element, characterized in that Comprising: a single mounting element (110) for connecting the lamp to a mains socket; an axis (Y1) of the lamp, the axis passing through the single mounting element (110); and a plurality of filament elements supported by the single mounting element, each filament element comprising: a single filament (210) configured to generate light, the single filament extending in a direction away from the single mounting element, wherein the single filament comprises an elongated light generating portion (211) and at least two electrodes (212) on the elongated light generating portion; and a tube (220) of optically transmissive material completely covering the elongated light generating portion of the single filament, wherein the plurality of filament elements extend parallel to the axis of the lamp. Further comprising a holder (130) comprising:

2. The lamp of claim 1, wherein a cap portion (131) configured to engage with the plurality of filament elements, wherein each filament element engages with the single mounting element at a first end of the plurality of filament elements and engages with the cap portion at a second end of the plurality of filament elements, the second end being different from the first end; and a base engagement portion (132) configured to structurally engage the cap portion to the single mounting element. The holder is releasably connected to the single mounting element.

3. The lamp of claim 2, wherein For each filament element, the at least two electrodes of the single filament are located on a first end of the elongated light generating portion.

4. A lamp as claimed in claim 2 or 3, characterized in that Each filament element is electrically connected to a remainder of the lamp only via the at least two electrodes at the first end of the elongated light generating portion.

5. The lamp of claim 4, wherein For each filament element, the at least two electrodes of the single filament are distributed between a first end and a second end of the elongated light generating portion, the second end being different from the first end.

6. A lamp as claimed in claim 2 or 3, characterized in that Further comprising an electrical connection configured to connect to one or more electrodes at the second end of the elongated light generating portion, wherein the electrical connection passes through the base engagement portion (132).

7. The lamp of claim 6, wherein For each filament element:

8. The lamp of any one of claims 1 to 3, wherein, the two or more electrodes pass through the tube; the tube is sealed to enclose the elongated light generating portion; and the electrodes are fixed to the tube via a compression of the tube. Each tube (220) of optically transmissive material is a straight tube.

9. The lamp of any one of claims 1 to 3, wherein, The elongated light generating portion is a LED filament comprising:

10. The lamp of any one of claims 1 to 3, characterized in that an elongated substrate (252); and a string of LED chips (251) mounted on a first face (253) of the elongated substrate, wherein each filament element is arranged within the lamp such that the first face of the elongated substrate faces towards an exterior of the lamp. The plurality of filament elements are arranged in a circle around the axis of the lamp.

11. The lamp of any one of claims 1 to 3, wherein, Further comprising one or more electrical components (320) positioned within a volume delimited by the plurality of filament elements.

12. The lamp of any one of claims 1 to 3, wherein, Comprising a printed circuit board (310, 510), wherein the single filament of each filament element is soldered to the printed circuit board.

13. The lamp of any one of claims 1 to 3, wherein, The lamp comprises not less than 4 filament elements.

14. The lamp of any one of claims 1 to 3, wherein, ​ 15. The lamp of any one of claims 1 to 3, wherein, The maximum radius of the lamp in any plane parallel to the first plane is not more than 3 times the maximum radius of the mounting element in any plane parallel to the first plane. The maximum radius of the lamp in any plane parallel to the first plane is not more than 3 times the maximum radius of the mounting element in any plane parallel to the first plane.

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