Flexible filament and lamp adopting same
By setting conductive circuit layers, connecting circuit layers and vias on the flexible substrate, a more refined design of RGBCW filament is achieved, solving the problems of large width and high cost of existing filaments, and improving production efficiency and adjustment accuracy.
Patent Information
- Application Number
- CN202421098416.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-05-20
- Publication Date
- 2025-02-14
- Estimated Expiration
- 2034-05-20
AI Technical Summary
Since the existing RGBCW filaments need to control five different color light sources, complex circuits need to be set up on the flexible substrate, which increases the production difficulty and cost, and also makes the filaments wide, affecting the aesthetics and application range.
By providing conductive line layers, communication line layers and vias on both front and back of the flexible substrate, each light source module forms an electrical connection through the conductive line layers and or communication line layers and vias to avoid line congestion and reduce the width of the flexible substrate. .
A more refined design of flexible filament is achieved, with a width of less than or equal to 4mm, which reduces production costs, improves production yield, and avoids color aliasing phenomenon, ensuring the adjustment accuracy of color and color temperature.
Smart Images
Figure CN222483386U_ABST
Abstract
Description
Technical Field
[0001] The utility model belongs to the technical field of LED light sources, and more specifically relates to a flexible filament and a lamp using the flexible filament. Background Art
[0002] Compared with traditional incandescent lamps, LED filaments are more flexible and can be made into different shapes and sizes to meet the design requirements of various lighting products. With the advancement of technology, LED filaments have begun to realize the functions of colorful and multi-color temperature.
[0003] In the prior art, RGBCW filaments are mainly realized by arranging five LED light-emitting modules of different colors on a flexible substrate; these LED light-emitting modules are connected through circuits, and the color and color temperature can be adjusted as needed to create different lighting effects; in addition, some RGBCW filaments use polyimide or polyester film as flexible substrate materials to improve the flexibility and durability of the light strip; however, since five different color light sources need to be controlled, five different LED light-emitting modules need to be arranged together, and it is necessary to set up a complex circuit on the flexible substrate, which not only increases the difficulty and cost of filament production; but also makes the filament wider, generally higher than 5 mm, which not only affects the appearance of the filament, but also limits its application in certain occasions. Utility Model Content
[0004] The technical problem to be solved by the utility model is to provide a flexible filament and a lamp using the flexible filament, wherein the flexible filament can reduce the width of the flexible substrate of the filament to obtain a thinner filament.
[0005] The utility model provides a flexible filament, comprising a flexible substrate, a front side of the flexible substrate is provided with a plurality of conductive circuit layers along its length direction, and a back side of the flexible substrate is provided with at least one group of connected circuit layers;
[0006] The front side of the flexible substrate is arranged along its length direction with any two 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;
[0007] Furthermore, each light source module is electrically connected through a conductive circuit layer or through a conductive circuit layer and a connecting circuit layer, and the conductive circuit layer and the connecting circuit layer are electrically connected through a plurality of via holes.
[0008] As a further improvement of the utility model, 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 are respectively arranged on the front side of the flexible substrate along its length direction.
[0009] As a further improvement of the utility model, each light source module includes a plurality of light-emitting chips and a light-transmitting adhesive layer. Each light-emitting chip is laid along the conductive circuit layer. The light-transmitting adhesive layer covers each light-emitting chip and is wrapped to the front of the flexible substrate.
[0010] As a further improvement of the present invention, the red light source module, the green light source module, and the blue light source module respectively include LED lamp bead particles of corresponding colors, and the LED lamp bead particles of the same color are respectively connected in series, in parallel, or in series and parallel through a conductive circuit layer and / or through a plurality of vias and corresponding connecting circuit layers.
[0011] As a further improvement of the present invention, the width of the flexible substrate is less than or equal to 4 mm.
[0012] As a further improvement of the utility model, the reverse side of the flexible substrate is 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 a reflective ink, a metallic ink or a pearlescent ink.
[0014] As a further improvement of the present invention, the flexible substrate is folded toward its reverse side along its length direction, and the reverse sides of the folded flexible substrate are bonded to each other; the overall width of the flexible substrate after folding is less than or equal to 3 mm; and a light shielding layer or a heat conductive layer is provided between the folded surfaces of the folded flexible substrate.
[0015] As a further improvement of the utility model, the flexible substrate is provided with a plurality of long cuts along its length direction, and the flexible substrate is folded toward the reverse side of the flexible substrate along the long cuts.
[0016] As a further improvement of the utility model, the shading layer or heat-conducting layer is a PVC shading film, a PET shading film, a copper foil layer or a plastic flexible metal layer, and the shading layer or heat-conducting layer is connected between the folded surfaces of the flexible substrate after being folded.
[0017] A lamp using the flexible filament comprises a carrier, wherein the flexible filament is arranged in the carrier, and two ends of each light source loop formed by the flexible filament are respectively electrically connected to a built-in or external power source.
[0018] 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 flexible filament is arranged in the bulb, the lamp holder is connected to one side outside the bulb, the power driver is placed in the lamp holder, and the two extreme ends of each light source circuit of the flexible filament are electrically connected to the lamp holder via the power driver respectively;
[0019] 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 the two extreme ends of each light source circuit of the flexible filament are connected to the lithium battery via the power driver.
[0020] Compared with the prior art, the beneficial effects of the utility model are as follows: the scheme of the utility model respectively arranges a conductive circuit layer, a connecting circuit layer and a via hole on the front and back sides of the flexible substrate, and the corresponding light source module forms an electrical connection through the conductive circuit layer and / or the connecting circuit layer and the via hole, thereby avoiding circuit congestion caused by only arranging a circuit layer on one side of the flexible substrate, and also avoiding widening the flexible substrate in order to lay more circuits. Such an arrangement not only makes the width of the flexible substrate less than or equal to 4 mm, thereby reducing the width of the filament; it also makes the circuit layout on the flexible substrate more reasonable, avoids failures caused by circuit congestion, improves production yield, reduces losses, and thus reduces production costs;
[0021] The flexible substrate is folded toward its reverse side in the extension direction, thereby greatly reducing the overall width of the substrate, and each light source module on the flexible substrate can be separated to face two directions after being folded, for example, the red light source module, the green light source module, and the blue light source module are arranged on the upper side of the folded flexible substrate, and the cold white light source module and the warm white light source module are arranged on the lower side of the folded flexible substrate, thereby avoiding the phenomenon of color aliasing when adjusting the color and color temperature, thereby ensuring the precision and accuracy of adjusting the cold white light source module and the warm white light source module;
[0022] The light-emitting chip includes one or more of the red light chip, green light chip, blue light chip, cold white light chip, and warm white light chip, which can achieve richer and more natural lighting effects according to needs, and can adjust the color and color temperature as needed to create different lighting effects. BRIEF DESCRIPTION OF THE DRAWINGS
[0023] Figure 1 This is a schematic diagram of the structure of the flexible filament of the utility model;
[0024] Figure 2 This is a schematic diagram of the partial front structure of the flexible filament of the utility model;
[0025] Figure 3 This is a schematic diagram of the partial structure of the back side of the flexible filament of the utility model;
[0026] Figure 4 This is a schematic diagram of the structure of LED lamp beads arranged on the flexible filament of the utility model;
[0027] Figure 5 This is a schematic diagram of the front light source module arrangement of the flexible filament described in Example A of the utility model;
[0028] Figure 6 This is a schematic diagram of the back-side connection circuit layer of the flexible filament described in Example A of the utility model;
[0029] Figure 7 This is a schematic diagram of the arrangement of the light source module on the front side of the flexible filament described in Example B of the utility model;
[0030] Figure 8 This is a schematic diagram of the connected circuit layer on the back of the flexible filament described in Example B of the utility model;
[0031] Fig. 9 for Figure 7 Schematic diagram of the conductive circuit layer and pad arrangement on the front side of the flexible substrate shown in FIG;
[0032] Fig.10 This is one of the schematic diagrams of the structure of the flexible filament after folding of the utility model;
[0033] Fig.11 This is the second schematic diagram of the structure of the flexible filament after folding of the utility model;
[0034] Fig.12 This is a schematic diagram of the structure of the flexible filament of the utility model used in a bulb lamp;
[0035] Fig.13 This is a schematic diagram of the structure of a lamp including a lamp holder in which the flexible filament of the utility model is used.
[0036] Description of the numbers in the figure:
[0037] Flexible substrate 1, conductive circuit layer 2, connecting circuit layer 3, via 4, light-emitting chip 5, translucent adhesive layer 6, LED lamp bead particles 7, transparent adhesive layer 72, light source module 10, green light source module 11, blue light source module 12, cold white light source module 13, warm white light source module 14, long incision 20, multi-color temperature white light source 101, three-color lamp bead particles 200, multi-color light source 201, bulb shell 8, power driver 9, lamp holder 10, flexible filament 100, translucent cover 15, lamp holder 16, lithium battery 17. DETAILED DESCRIPTION
[0038] 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.
[0039] Specific implementation method: Please refer to Figure 1-11 A flexible filament comprises a flexible substrate 1, a plurality of conductive circuit layers 2 are laid on the front side of the flexible substrate 1 along its length direction, and at least one group of connected circuit layers 3 are laid on the back side of the flexible substrate 1;
[0040] The front side of the flexible substrate 1 is arranged along its length direction with any two or more groups of a red light source module 10, a green light source module 11, a blue light source module 12, a cold white light source module 13 and a warm white light source module 14;
[0041] Each light source module is electrically connected through the conductive circuit layer 2 or through the conductive circuit layer 2 and the connecting circuit layer 3 . The conductive circuit layer 2 and the connecting circuit layer 3 are electrically connected through a plurality of vias 4 .
[0042] Each light source module includes a plurality of light emitting chips 5 and a transparent adhesive layer 6 . Each light emitting chip 5 is laid along the conductive circuit layer 2 . The transparent adhesive layer 6 covers each light emitting chip 5 and wraps around the front of the flexible substrate 1 .
[0043] The light emitting chip 5 includes one or more of a red light chip, a green light chip, a blue light chip, a cold white light chip and a warm white light chip.
[0044] See also Figure 2 In one embodiment, a red light source module 10, a green light source module 11, a blue light source module 12, a cold white light source module 13 and a warm white light source module 14 are arranged on the front side of the flexible substrate 1 along its length direction.
[0045] See also Figure 4-9 . Optionally, the red light source module 10, the green light source module 11, and the blue light source module 12 respectively include a number of LED lamp beads 7 of corresponding colors, and each LED lamp bead particle 7 of the same color is connected in series, in parallel, or in series and in parallel through the conductive circuit layer 2 and / or through a number of vias 4 and the corresponding connecting circuit layer 3. Each LED lamp bead particle 7 of the corresponding color does not need to be coated with fluorescent glue separately, because the light-emitting chip 5 constituting the lamp bead particle is already covered with a transparent glue layer 72. Each LED lamp bead particle 7 is encapsulated and integrated with a red light chip, a green light chip, and a blue light chip through a transparent glue layer to form a three-color lamp bead particle 200, and each three-color lamp bead particle 200 is provided with 6 pins at the input and output ends, and a number of groups of lamp bead particle placement areas with 6 pads are respectively provided on the corresponding front conductive circuit layer 2 of the flexible substrate 1, and each three-color lamp bead particle 200 is placed in the lamp bead particle placement area, and its pins are respectively welded with the corresponding pads. In addition, the red light chips of each three-color lamp bead particle 200 are individually connected in series, in parallel, or in series and parallel via the conductive circuit layer 2 to form a red light source module 10; the green light chips of each LED light group particle 7 are individually connected in series, in parallel, or in series and parallel via the conductive circuit layer 2 to form a green light source module 11; the blue light chips of each LED light group particle 7 are individually connected in series, in parallel, or in series and parallel via the conductive circuit layer 2 to form a blue light source module 12.
[0046] Preferably, the width of the flexible substrate 1 is less than or equal to 4 mm.
[0047] Optionally, the light-transmitting adhesive layer 6 is a adhesive layer containing or not containing fluorescent powder. The via hole 4 passes through the conductive circuit layer 2, the flexible substrate 1 and the connecting circuit layer 3 in sequence.
[0048] Optionally, the back side of the flexible substrate is covered with a light-shielding film, a light-shielding coating, or printed with light-shielding ink. The light-shielding film is a polyester film; the light-shielding coating is a metal oxide coating; the light-shielding ink is a reflective ink, a metal ink, or a pearlescent ink. The polyester film is made of polyester resin, has good insulation and electrical resistance, and has not only a specific light-shielding effect but also insulation properties.
[0049] The conductive circuit layer 2 includes a plurality of sub-circuits, which are arranged along the length direction of the flexible substrate 1 , and the sub-circuits are arranged at intervals on the front side of the flexible substrate 1 .
[0050] When there are 5 sub-circuits arranged, and three adjacent sub-circuits on one side of the flexible substrate 1 are respectively laid with corresponding red light source modules 10, green light source modules 11 and blue light source modules 12, emitting red light, green light and blue light respectively, the other two adjacent sub-circuits are respectively laid with corresponding cold white light source modules 13 and warm white light source modules 14, emitting cold white light and warm white light respectively.
[0051] Preferably, the conductive circuit layer 2 and the connecting circuit layer 3 are both made of copper foil.
[0052] See also Fig.10 , Fig.11 On the basis of the above embodiment, in another implementation manner, the flexible substrate 1 is folded toward its reverse side along its length direction, and the reverse sides of the folded flexible substrate 1 are bonded to each other; the overall width of the folded flexible substrate 1 is less than or equal to 3 mm; and a light shielding layer or a heat conducting layer is provided between the folded surfaces of the folded flexible substrate 1.
[0053] Reference Figure 2 , Figure 3 The flexible substrate 1 is provided with a plurality of long cuts 20 along its length direction, and the long cuts 20 are provided in sequence, and the flexible substrate 1 is folded along the long cuts 20 toward the reverse side of the flexible substrate 1; optionally, the light shielding layer or the heat conducting layer is a PVC light shielding film, a PET light shielding film, a copper foil layer or a plastic flexible metal layer, and the light shielding layer or the heat conducting layer is connected between the folded surfaces of the flexible substrate after being folded.
[0054] The two sides of the copper foil layer are bonded between the folded surfaces of the flexible substrate 1 through silicone; the copper foil layer is arranged between the folded surfaces of the flexible substrate 1 to play a role in heat conduction. The shaped flexible metal layer is bonded between the folded surfaces of the flexible substrate, so that the flexible filament body can be bent into a desired shape by the shaped flexible metal layer and remain unchanged.
[0055] A barrier sheet is disposed on the reverse side of the flexible substrate 1, and the barrier sheet is disposed on one side of the long cutout 20. Preferably, the barrier sheet is a shapeable shaping sheet.
[0056] When the light on one side of the long cutout 20 is a multi-color light source 201; the light on the other side of the long cutout 20 is a multi-color temperature white light source 101; the barrier is arranged on the back side of the multi-color light source or the back side of the multi-color temperature white light source. The multi-color light source 201 can be composed of a plurality of three-color lamp beads 200 connected in series, in parallel, or in series and in parallel, or can be formed by light-transmitting adhesive layers 6 covering light-emitting chips 5 of corresponding colors and coating them on the front side of the flexible substrate 1. The multi-color temperature white light source 101 is formed by light-transmitting adhesive layers 6 covering light-emitting chips 5 of corresponding color temperatures and coating them on the front side of the flexible substrate 1.
[0057] A lamp comprises a carrier, wherein any of the above-mentioned flexible filaments 100 is arranged in the carrier, and two ends of each light source loop constituted by the flexible filament are respectively electrically connected to a built-in or external power source.
[0058] See also Fig.12 The carrier includes a bulb shell 8, a power driver 9 and a lamp holder 10 for electrically connecting to an external power source, a flexible filament 100 is arranged in the bulb shell 8, the lamp holder 10 is connected to one side outside the bulb shell 8, the power driver 9 is placed in the lamp holder 10, and two ends of each light source circuit of the flexible filament 100 are electrically connected to the lamp holder 10 via the power driver 9;
[0059] Or, see Fig.13 The carrier includes a light-transmitting cover 15, a lamp holder 16, a power driver 9 and a lithium battery 17 as a built-in power source. The flexible filament 100 is arranged in the light-transmitting cover 15, the power driver 9 and the lithium battery 17 are placed in the lamp holder 16, and the two ends of each light source circuit of the flexible filament 100 are connected to the lithium battery 17 through the power driver 9. The lamp holder 16 is also provided with a charging socket for charging the lithium battery 17.
[0060] Optionally, the lamp holder and the bulb shell are bonded and fixed; an insulating member is provided inside the lamp holder, and the insulating member is wrapped around the outer periphery of the power driver to prevent a short circuit between the power driver and the inner wall of the lamp holder.
[0061] 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 flexible filament, characterized in that: It comprises a flexible substrate, wherein a plurality of conductive circuit layers are laid on the front side of the flexible substrate along the length direction thereof, and at least one group of connected circuit layers are laid on the back side thereof; The front side of the flexible substrate is arranged along its length direction with any two 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; Furthermore, each light source module is electrically connected through a conductive circuit layer or through a conductive circuit layer and a connecting circuit layer, and the conductive circuit layer and the connecting circuit layer are electrically connected through a plurality of via holes.
2. A flexible filament according to claim 1, characterized in that: 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 are respectively arranged on the front side of the flexible substrate along its length direction.
3. A flexible filament according to claim 1 or 2, characterized in that: Each light source module comprises a plurality of light emitting chips and a light-transmitting adhesive layer. Each light emitting chip is laid along the conductive circuit layer. The light-transmitting adhesive layer covers each light emitting chip and is wrapped to the front of the flexible substrate.
4. A flexible filament according to claim 1 or 2, characterized in that: The red light source module, green light source module and blue light source module respectively include LED lamp bead particles of corresponding colors, and the LED lamp bead particles of the same color are respectively connected in series, in parallel or in series and in parallel through a conductive circuit layer and / or through a plurality of vias and corresponding connecting circuit layers.
5. The flexible filament according to claim 1, characterized in that: The width of the flexible substrate is less than or equal to 4 mm.
6. The flexible filament according to claim 1, characterized in that: The reverse side of the flexible substrate is covered with a light-shielding film, a light-shielding coating or printed with light-shielding ink.
7. A flexible filament according to claim 6, 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 reflective ink, a metallic ink or a pearlescent ink.
8. The flexible filament according to claim 1, characterized in that: The flexible substrate is folded toward its reverse side along its length direction, and the reverse sides of the folded flexible substrates are bonded to each other; the overall width of the folded flexible substrate is less than or equal to 3mm; and a light shielding layer or a heat conducting layer is provided between the folded surfaces of the folded flexible substrate.
9. The flexible filament according to claim 1, characterized in that: The flexible substrate is provided with a plurality of long cuts along its length direction, and the flexible substrate is folded toward the reverse side of the flexible substrate along the long cuts.
10. The flexible filament according to claim 8, characterized in that: The light shielding layer or heat conducting layer is a PVC light shielding film, a PET light shielding film, a copper foil layer or a plastic flexible metal layer, and the light shielding layer or heat conducting layer is connected between the folded surfaces of the flexible substrate after being folded.
11. A lamp using the flexible filament according to any one of claims 1 to 10, characterized in that: The device comprises a carrier, in which the filament is arranged, and two ends of each light source circuit formed by the carrier are respectively electrically connected to a built-in or external power source.
12. The lamp according to claim 11, characterized in that: The carrier includes a bulb shell, a power driver and a lamp holder for electrically connecting to an external power source, the flexible filament is arranged in the bulb shell, the lamp holder is connected to one side outside the bulb shell, the power driver is placed in the lamp holder, and two ends of each light source circuit of the flexible filament are electrically connected to the lamp holder via the power driver respectively; 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 the two extreme ends of each light source circuit of the flexible filament are connected to the lithium battery via the power driver.