Filament and lamp using same

Abstract

The utility model discloses a lamp filament and a lamp using the same. The lamp filament comprises a plurality of light-emitting light source modules, a first substrate and a second substrate. The front face of the first substrate and the front face of the second substrate are each provided with at least one light-emitting source module in the length direction. The back face of the first substrate and the back face of the second substrate are attached to form a lamp filament body together. According to the arrangement, line congestion caused by the fact that the conducting circuit is only arranged on one side of the substrate is avoided, meanwhile, the situation that the substrate is widened for laying more conducting circuits is avoided, and the width of the substrate can be small enough; therefore, the lamp filament is more beautiful, and can be made into more shapes in the use process.

Description

Technical Field

[0001] The utility model belongs to the technical field of LED light sources, and more specifically relates to a filament and a lamp using the filament. Background Art

[0002] LED filament lamps are loved by more and more people due to their diverse shapes, low energy consumption and long life. With the development of intelligent control, customers have more and more demands for multiple color temperatures and / or multiple color adjustments. Filaments with multiple color temperatures and / or multiple colors have multiple LED chips, and the multiple LED chips are basically arranged in parallel on a substrate and then covered with a layer of glue to achieve different color temperatures and / or colors. Since the layout of the chips and the glue layer require a certain layout space, and the light emitted by each color area and color temperature area may affect each other, thereby affecting the luminous effect, there is a certain spacing distance between the LED chips to avoid mutual interference. In this way, the width of the filament will be wider, resulting in the appearance of the product being not beautiful enough, increasing the difficulty of filament production, and the difficulty and cost of lamp installation. Utility Model Content

[0003] The technical problem to be solved by the utility model is to provide a filament and a lamp using the filament, which can realize a colorful and / or multi-color temperature filament and reduce the width of the filament.

[0004] The utility model discloses a filament, comprising a plurality of light source modules, a first substrate and a second substrate; at least one group of light source modules are arranged on the front side of the first substrate and in the extension direction of the front side of the second substrate respectively; the back side of the first substrate is bonded to the back side of the second substrate to form a filament body together.

[0005] As a further improvement of the utility model, the light source modules include a red light source module, a green light source module, a blue light source module, a cold white light source module and a warm white light source module respectively;

[0006] One or more groups of red light source modules, green light source modules, blue light source modules, cold white light source modules and warm white light source modules are arranged on the front side of the first substrate along the length direction;

[0007] One or more groups of red light source modules, green light source modules, blue light source modules, cold white light source modules and warm white light source modules are arranged on the front side of the second substrate along the length direction.

[0008] As a further improvement of the present invention, a cold white light source module and a warm white light source module are arranged on the front side of the first substrate along its length direction;

[0009] The front side of the second substrate is provided with one or more groups of red light source modules, green light source modules and blue light source modules along the length direction thereof;

[0010] The reverse side of the first substrate and the reverse side of the second substrate are bonded together to form a filament body.

[0011] As a further improvement of the present invention, both the first substrate and the second substrate are flexible substrates.

[0012] As a further improvement of the present invention, the front and / or back surface of the flexible substrate is integrally covered with a light-shielding film, a light-shielding coating or printed with light-shielding ink.

[0013] As a further improvement of the utility model, the light-shielding film is a polyester film; the light-shielding coating is a metal oxide coating; and the light-shielding ink is carbon black ink or metal ink.

[0014] As a further improvement of the present invention, each light-emitting light source module is composed of a circuit layer, a plurality of light-emitting chips and a light-transmitting adhesive layer. The circuit layer is arranged on the front side of each corresponding substrate and extends along its length direction. Each light-emitting chip is laid along the circuit layer and is electrically connected in series, in parallel or in a mixed series and parallel manner through the circuit layer. The light-transmitting adhesive layer covers the light-emitting chip and is wrapped to the corresponding substrate.

[0015] As a further improvement of the present invention, a light shielding layer or a heat conducting layer is bonded between the reverse side of the first substrate and the reverse side of the second substrate.

[0016] As a further improvement of the utility model, the light-shielding layer is a PVC light-shielding film or a PET light-shielding film, and the two side surfaces of the light-shielding layer are integrally connected between the reverse side of the first substrate and the reverse side of the second substrate by glue.

[0017] As a further improvement of the utility model, the heat-conducting layer is a copper foil layer, which is printed on the reverse side of the first substrate and bonded to the reverse side of the second substrate through silica gel;

[0018] Alternatively, the copper foil layer is printed on the reverse side of the second substrate and bonded to the reverse side of the first substrate via silica gel.

[0019] As a further improvement of the present invention, the heat-conducting layer is a plastic flexible metal layer, and the plastic flexible metal layer is integrally connected between the reverse surface of the first substrate and the reverse surface of the second substrate through silicone.

[0020] As a further improvement of the present invention, the width of the first substrate and the second substrate are both less than or equal to 3 mm.

[0021] As a further improvement of the present invention, a plurality of loop circuit layers are printed on the back side of the first substrate and / or the back side of the second substrate, and at least one group of light-emitting light source modules on the front side of the first substrate and / or the front side of the second substrate are electrically connected to the corresponding loop circuit layers on the back side through vias opened on the corresponding first substrate and / or the second substrate to form a conductive loop.

[0022] As a further improvement of the utility model, at least one layer of transparent, colored, fluorescent or frosted heat shrink tubing is sleeved outside the filament body along its length direction, and the heat shrink tubing is subjected to heat shrinkage and wrapped around the filament body.

[0023] As a further improvement of the utility model, the heat shrinkable tube is a Teflon heat shrinkable tube, a PFA heat shrinkable tube, a PVC heat shrinkable tube, a polyester heat shrinkable tube or a silicone heat shrinkable tube.

[0024] A lamp using the above filament comprises a carrier, wherein any of the above filaments is arranged in the carrier, and the two extreme ends of each light source circuit constituted by the filament are respectively electrically connected to a built-in or external power source.

[0025] As a further improvement of the utility model, the carrier includes a bulb, a power driver and a lamp holder for electrically connecting to an external power supply, the filament is arranged inside the bulb, the lamp holder is connected to one side outside the bulb, the power driver is placed inside the lamp holder, and each electrode of the filament is electrically connected to the lamp holder via the power driver;

[0026] Alternatively, the carrier includes a light-transmitting cover, a lamp holder, a power driver and a lithium battery as a built-in power source, the filament is arranged in the light-transmitting cover, the power driver and the lithium battery are placed in the lamp holder, and each electrode of the filament is electrically connected to the lithium battery via the power driver.

[0027] Compared with the prior art, the beneficial effects of the utility model are as follows: the solution of the utility model increases more space for laying out the conductive circuit by setting the substrate as a first substrate and a second substrate; avoids the circuit congestion caused by laying out the conductive circuit only on one side of the substrate, and also avoids widening the substrate in order to lay out more conductive circuits, so that the width of the substrate can be made small enough; makes the filament more beautiful, and can make more shapes during use.

[0028] The front and / or back surfaces of the first substrate and the second substrate are integrally covered with a light-shielding film, a light-shielding coating, or printed light-shielding ink to avoid interference between the light emitted by the light source modules;

[0029] The first substrate and the second substrate may be fixed by glue, and the glue may be a thermally conductive glue to increase the heat dissipation capacity of the substrate;

[0030] A shading layer may be provided between the first substrate and the second substrate to avoid mutual interference between the light arranged by the first substrate and the light arranged by the second substrate. An independent heat-conducting layer may be provided between the first substrate and the second substrate, such as copper foil, shaped flexible metal, ceramic, etc., to increase the heat dissipation capacity of the substrate and extend the life of the filament.

[0031] The use of plastic flexible metal can not only increase heat dissipation, but also shape the filament, thereby reducing the number of supports required in the process of making the filament into a lamp. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 This is one of the schematic diagrams of the filament structure of the utility model;

[0033] Figure 2 This is one of the schematic diagrams of the local structure of the filament of the utility model;

[0034] Figure 3 This is the second schematic diagram of the local structure of the filament of the utility model;

[0035] Figure 4 This is the third schematic diagram of the local structure of the filament of the utility model;

[0036] Figure 5 This is the fourth schematic diagram of the local structure of the filament of the utility model;

[0037] Figure 6 This is the second schematic diagram of the filament structure of the utility model;

[0038] Figure 7 This is a schematic diagram of the front structure of the first substrate of the utility model;

[0039] Figure 8 This is a schematic diagram of a chip arrangement structure of the first substrate of the utility model;

[0040] Fig. 9 This is a schematic diagram of the front structure of the second substrate of the utility model;

[0041] Fig.10 This is a schematic diagram of a chip arrangement structure of the second substrate of the utility model;

[0042] Fig.11 This is a schematic diagram of the back structure of one of the second substrates of the utility model;

[0043] Fig.12 This is a schematic diagram of the structure of the filament of the utility model used in a bulb lamp;

[0044] Fig.13 This is a schematic diagram of the structure of the filament of the utility model used in a lamp including a lamp holder.

[0045] Description of the numbers in the figure:

[0046] 11. First substrate; 12. Second substrate; 13. Silicone; 14. Shading layer; 15. Heat conducting layer; 16. Shapeable flexible metal layer; 2. Light-emitting chip; 21. Red light chip; 22. Green light chip; 23. Blue light chip; 24. Cold white light chip; 25. Warm white light chip; 3. Transparent adhesive layer; 4. Circuit layer; 41. Cold white light circuit layer; 42. Warm white light circuit layer; 43. Red light circuit layer; 44. Green light circuit layer; 45. Blue light circuit layer; 46. Loop circuit layer; 5. Heat shrink tubing; 61. Red light source module; 62. Green light source module; 63. Blue light source module; 64. Cold white light source module; 65. Warm white light source module. DETAILED DESCRIPTION

[0047] The present invention will be further described in detail below in conjunction with the embodiments. The following embodiments are intended to explain the present invention but the present invention is not limited to the following embodiments.

[0048] Specific implementation method: Please refer to Figure 1-13 A filament comprises a plurality of light source modules, a first substrate 11 and a second substrate 12; at least one group of light source modules are arranged in the extension direction of the front side of the first substrate 11 and the front side of the second substrate 12 respectively; the back side of the first substrate 11 and the back side of the second substrate 12 are bonded together to form a filament body.

[0049] Preferably, the width of the first substrate 11 and the second substrate 12 are both less than or equal to 3 mm.

[0050] The first substrate 11 and the second substrate 12 are both flexible substrates.

[0051] Optionally, the flexible substrate is a transparent substrate; the flexible substrate is an FPC substrate, and the material of the FPC flexible substrate is PI (polyimide).

[0052] Optionally, the first substrate 11 , the second substrate 12 and the dielectric layer 13 have the same width.

[0053] The luminous light source modules respectively include a red light source module 61, a green light source module 62, a blue light source module 63, a cold white light source module 64 and a warm white light source module 65; the front side of the first substrate 11 is arranged along the length direction with one or more groups of red light source modules, green light source modules, blue light source modules, cold white light source modules and warm white light source modules; the front side of the second substrate 12 is arranged along the length direction with one or more groups of red light source modules, green light source modules, blue light source modules, cold white light source modules and warm white light source modules.

[0054] Each light source module comprises a circuit layer, a plurality of light emitting chips 2 and a light-transmitting adhesive layer 3. The circuit layer is arranged on the front side of each corresponding substrate and extends along its length direction. Each light emitting chip 2 is laid along the circuit layer and is electrically connected in series, in parallel or in a mixture of series and parallel through the circuit layer. The light-transmitting adhesive layer 3 covers the light emitting chip 2 and is wrapped to the corresponding substrate.

[0055] The light-emitting chip 2 includes one or more of a red light chip 21, a green light chip 22, a blue light chip 23, a cold white light chip 24 and a warm white light chip 25; each light-emitting chip 2 is electrically connected in series, in parallel or in a series-parallel hybrid through a circuit layer to form a light source module.

[0056] Optionally, the circuit layer is provided with matching pads for carrying the positive and negative electrodes on the corresponding light-emitting chip 2 to connect the light-emitting chip 2 to form a corresponding light-emitting circuit.

[0057] The front side of the first substrate 11 is arranged with a cold white light source module 64 and a warm white light source module 65 along its length direction; the front side of the second substrate 12 is arranged with any one or more groups of a red light source module 61, a green light source module 62 and a blue light source module 63 along its length direction; the back side of the first substrate 11 and the back side of the second substrate 12 are bonded together by silicone rubber 13 to form the filament body.

[0058] In one embodiment, the circuit layer includes a cold white light circuit layer 41, a warm white light circuit layer 42, a red light circuit layer 43, a green light circuit layer 44 and a blue light circuit layer 45; the cold white light circuit layer 41 and the warm white light circuit layer 42 are arranged in parallel and at intervals on the front of the first substrate 11, and both extend along the length direction of the first substrate 11; the red light circuit layer 43, the green light circuit layer 44 and the blue light circuit layer 45 are arranged in parallel and at intervals on the front of the second substrate 12, and both extend along the length direction of the second substrate 12; the red light circuit layer 4 3 is provided with a red light chip 21 and electrically connected to form a red light source module 61; a green light circuit layer 44 is provided with a green light chip 22 and electrically connected to form a green light source module 62; a blue light circuit layer 45 is provided with a blue light chip 23 and electrically connected to form a blue light source module 63; a cold white light circuit layer 41 is provided with a cold white light chip 24 and electrically connected to form a cold white light source module 64; a warm white light circuit layer 42 is provided with a warm white light chip 25 and electrically connected to form a warm white light source module 65.

[0059] In another embodiment, the front and / or back surface of the flexible substrate is integrally covered with a light-shielding film, a light-shielding coating, or printed with light-shielding ink.

[0060] The light-shielding film is a black polyester film; the light-shielding coating is a metal oxide coating; and the light-shielding ink is a carbon black ink or a metal ink.

[0061] Polyester film is made of polyester resin and has good insulation and electrical resistance. It not only has a shading effect but also has insulation properties.

[0062] Metallic ink contains metallic pigments, such as copper powder, aluminum powder, etc.; metallic ink has good reflective properties.

[0063] Carbon black ink contains carbon black pigment, which has pure color, strong covering power and good weather resistance. It not only has good light-shielding effect, but also has good insulation performance.

[0064] In another embodiment, a light shielding layer 14 or a heat conducting layer 15 is bonded between the reverse side of the first substrate 11 and the reverse side of the second substrate 12 .

[0065] The shading layer 14 is a PVC shading film or a PET shading film, and the two side surfaces of the shading layer 14 are integrally connected between the reverse side of the first substrate 11 and the reverse side of the second substrate 12 by glue; the shading layer 14 is used to block the light emitted by the light-emitting chips 2 on the first substrate 11 and the second substrate 12 from passing through the first substrate 11 and the second substrate 12, thereby affecting each other, making the emitted light impure and affecting the light-emitting effect.

[0066] The shading film made of PVC (polyvinyl chloride) material has good flexibility, is easy to process and assemble, and is suitable for covering irregular shapes.

[0067] PET light-shielding film has high strength and good toughness, can withstand high pressure and tension, and is not easy to break.

[0068] Optionally, the thermal conductive layer 15 is a copper foil layer, which is printed on the reverse side of the first substrate 11 and bonded to the reverse side of the second substrate 12 via the silicone 13 ; or, the copper foil layer is printed on the reverse side of the second substrate 12 and bonded to the reverse side of the first substrate 11 via the silicone 13 .

[0069] Optionally, the heat-conducting layer 15 may also be a plastic flexible metal layer 16 , and the plastic flexible metal layer 16 is integrally connected between the reverse side of the first substrate 11 and the reverse side of the second substrate 12 through the silicone 13 .

[0070] The filament can be shaped into spiral, curved, bent and other structures, which can be fixed by shaping the flexible metal layer 16, without the need to set up additional support parts such as core columns; such a setting is not only easy to operate and improve production efficiency, but also the filament shape will not be constrained by the support 2, thereby affecting the luminous effect, and also improves the aesthetics.

[0071] The heat conducting layer 15 may also be made of heat conducting materials such as heat conducting glue and ceramics.

[0072] In another embodiment, a plurality of loop circuit layers 46 are printed on the reverse side of the first substrate 11 and / or the reverse side of the second substrate 12, and at least one group of light source modules on the front side of the first substrate 11 and / or the front side of the second substrate 12 are electrically connected to the corresponding loop circuit layers 46 on the reverse side through vias opened on the corresponding first substrate and / or the second substrate to form a conductive loop.

[0073] In another embodiment, an insulating layer is disposed on the back side of the first substrate 11 and / or the second substrate 12 to prevent the loop circuit layer 46 disposed on the back side of the first substrate 11 and / or the second substrate 12 from being electrically connected or electrically connected to the outside.

[0074] In another embodiment, at least one layer of transparent, colored, fluorescent or frosted heat shrink tubing 5 is sleeved outside the filament body along its length direction, and the heat shrink tubing 5 is heat-shrinked and wrapped around the filament body.

[0075] Optionally, the heat shrinkable tube 5 can be a transparent heat shrinkable tube, a colored heat shrinkable tube, a frosted heat shrinkable tube, and a frosted colored heat shrinkable tube.

[0076] Optionally, the heat shrink tube 5 is a Teflon heat shrink tube, a PFA heat shrink tube, a PVC heat shrink tube, a polyester heat shrink tube or a silicone heat shrink tube.

[0077] Teflon heat shrink tubing is made of polytetrafluoroethylene (PTFE) and has excellent electrical insulation properties. It can maintain stable electrical properties in high temperature and harsh environments. It has excellent aging resistance and will not show obvious aging even in long-term high temperature environments.

[0078] PFA heat shrink tubing is made of polyvinyl fluoride epoxy resin (PFA); PFA heat shrink tubing is a high-performance polymer material with excellent heat resistance, chemical stability and electrical insulation properties; PFA heat shrink tubing can maintain stability at higher temperatures, usually with a temperature range of over 260°C, and even up to 280°C; PFA heat shrink tubing has excellent chemical corrosion resistance and can withstand corrosion from a variety of chemical substances such as acids, alkalis, and solvents; PFA heat shrink tubing has good aging resistance and is not easily affected by environmental factors such as ultraviolet rays, oxygen, and moisture.

[0079] PVC heat shrink tubing is made of polyvinyl chloride and has excellent insulation, corrosion resistance and wear resistance.

[0080] Polyester heat shrink tubing is made of polyester resin and has excellent electrical insulation performance, high temperature resistance and excellent corrosion resistance; polyester heat shrink tubing usually has a temperature resistance range of up to 100°C to 150°C.

[0081] Silicone heat shrink tubing is made of silicone rubber material. Silicone heat shrink tubing is soft and wear-resistant, and has excellent weather resistance, high temperature resistance and electrical insulation properties. Silicone heat shrink tubing usually has a temperature resistance range of 200°C to 250°C or above.

[0082] In another embodiment, a plurality of first pins are fixedly disposed at two ends of the first substrate 11; the first pins are electrically connected to corresponding input ends of the conductive circuit.

[0083] In another embodiment, a third substrate is fixedly arranged between the first substrate 11 and the second substrate 12; a connecting circuit layer is fixedly laid on the third substrate, and corresponding second pins are fixedly arranged at both ends of the third substrate; the connecting circuit layer is electrically connected and conducted with the corresponding second pins; the input ends of the conductive circuit layer are electrically connected and conducted with the second pins; optionally, the first pins are not arranged at both ends of the first substrate 11 and the second substrate 12, and the substrate 1 is electrically connected and conducted with the outside through the second pins.

[0084] A lamp adopts any one of the above-mentioned filaments, comprising a carrier, wherein the filament is arranged in the carrier, and the two extreme ends of each light source circuit constituted by the filament are respectively electrically connected to a built-in or external power supply.

[0085] The carrier includes a bulb shell 10, a power driver 20 and a lamp holder 30 for electrically connecting to an external power source, wherein the filament 100 is arranged in the bulb shell 10, the lamp holder 30 is connected to one side outside the bulb shell 10, the power driver 20 is placed in the lamp holder 30, and each electrode of the filament 100 is electrically connected to the lamp holder 30 via the power driver 20;

[0086] Alternatively, the carrier includes a light-transmitting cover 40, a lamp holder 50, a power driver 20 and a lithium battery 60 as a built-in power source, the filament 100 is arranged in the light-transmitting cover 40, the power driver 20 and the lithium battery 60 are placed in the lamp holder 50, and each electrode of the filament 100 is electrically connected to the lithium battery 60 via the power driver 20.

[0087] The above is only a preferred specific implementation method of the present application, but the protection scope of the present application is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes within the technical scope disclosed in the present application according to the technical solution and improved ideas of the present application, which should be covered by the protection scope of the present application.

Claims

1. A filament, characterized in that: It comprises a plurality of light source modules, a first substrate and a second substrate; at least one group of light source modules are arranged in the extension direction of the front side of the first substrate and the front side of the second substrate respectively; The reverse side of the first substrate and the reverse side of the second substrate are bonded together to form a filament body.

2. A filament according to claim 1, characterized in that: The light source modules include a red light source module, a green light source module, a blue light source module, a cold white light source module and a warm white light source module respectively; One or more groups of red light source modules, green light source modules, blue light source modules, cold white light source modules and warm white light source modules are arranged on the front side of the first substrate along the length direction; One or more groups of red light source modules, green light source modules, blue light source modules, cold white light source modules and warm white light source modules are arranged on the front side of the second substrate along the length direction.

3. A filament according to claim 2, characterized in that: A cold white light source module and a warm white light source module are arranged on the front side of the first substrate along the length direction thereof; The front side of the second substrate is provided with one or more groups of red light source modules, green light source modules and blue light source modules along the length direction thereof; The reverse side of the first substrate is attached to the reverse side of the second substrate to form the filament body.

4. A filament according to claim 3, characterized in that: The first substrate and the second substrate are both flexible substrates.

5. A filament according to claim 4, characterized in that: The front and / or back surface of the flexible substrate is integrally covered with a light-shielding film, a light-shielding coating or printed with light-shielding ink.

6. A filament according to claim 1, characterized in that: The light-shielding film is a polyester film; the light-shielding coating is a metal oxide coating; and the light-shielding ink is a carbon black ink or a metal ink.

7. A filament according to claim 1, characterized in that: Each light source module comprises a circuit layer, a plurality of light emitting chips and a light-transmitting adhesive layer. The circuit layer is arranged on the front side of each corresponding substrate and extends along its length direction. Each light emitting chip is laid along the circuit layer and is electrically connected in series, in parallel or in a mixture of series and parallel through the circuit layer. The light-transmitting adhesive layer covers the light emitting chip and is wrapped around the corresponding substrate.

8. A filament according to claim 7, characterized in that: A light shielding layer or a heat conducting layer is bonded between the reverse surface of the first substrate and the reverse surface of the second substrate.

9. A filament according to claim 7, characterized in that: The light shielding layer is a PVC light shielding film or a PET light shielding film, and the two side surfaces of the light shielding layer are integrally connected between the reverse surface of the first substrate and the reverse surface of the second substrate by glue.

10. A filament according to claim 7, characterized in that: The heat-conducting layer is a copper foil layer, which is printed on the reverse side of the first substrate and bonded to the reverse side of the second substrate; Alternatively, the copper foil layer is printed on the reverse side of the second substrate and bonded to the reverse side of the first substrate via silica gel.

11. A filament according to claim 1, characterized in that: The heat-conducting layer is a plastic flexible metal layer, and the plastic flexible metal layer is integrally connected between the reverse surface of the first substrate and the reverse surface of the second substrate through silicone.

12. A filament according to claim 7, characterized in that: The width of the first substrate and the second substrate are both less than or equal to 3 mm.

13. A filament according to claim 7, characterized in that: Several loop circuit layers are printed on the back side of the first substrate and / or the back side of the second substrate, and at least one group of light source modules on the front side of the first substrate and / or the front side of the second substrate are electrically connected to the corresponding loop circuit layers on the back side through vias opened on the corresponding first substrate and / or the second substrate.

14. A filament according to claim 7, characterized in that: At least one layer of transparent, colored, fluorescent or frosted heat shrinkable tube is sleeved outside the filament body along its length direction, and the heat shrinkable tube is subjected to heat shrinkage and coated outside the filament body.

15. A filament according to claim 1, characterized in that: The heat shrink tubing is a Teflon heat shrink tubing, a PFA heat shrink tubing, a PVC heat shrink tubing, a polyester heat shrink tubing or a silicone heat shrink tubing.

16. A lamp using the filament according to any one of claims 1 to 15, characterized in that: It comprises a carrier, the filament is arranged in the carrier, and the two ends of each light source loop constituted by the filament are respectively electrically connected to a built-in or external power supply.

17. The lamp according to claim 16, characterized in that: The carrier includes a bulb, a power driver and a lamp holder for electrically connecting to an external power source, the filament is arranged inside the bulb, the lamp holder is connected to one side outside the bulb, the power driver is placed inside the lamp holder, and each electrode of the filament is electrically connected to the lamp holder via the power driver; Alternatively, the carrier includes a light-transmitting cover, a lamp holder, a power driver and a lithium battery as a built-in power source, the filament is arranged in the light-transmitting cover, the power driver and the lithium battery are placed in the lamp holder, and each electrode of the filament is electrically connected to the lithium battery via the power driver.

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