LED lamp filament with riveted terminal and lamp

Abstract

The LED lamp filament comprises a substrate, the substrate is provided with a conductive circuit, a control chip, a light-emitting chip and an electric connection terminal, the light-emitting chip is arranged on the conductive circuit, and the electric connection terminal is electrically connected with the conductive circuit; one end of each electric connection terminal is fixed on the substrate, the other end of each electric connection terminal is exposed out of the substrate, the number of the electric connection terminals is four, and the four electric connection terminals are respectively arranged at two end parts of the substrate and are fixedly connected to the end parts of the substrate in a riveting manner. According to the utility model, the electric connection terminal and the substrate are connected by adopting a riveting process instead of a spot welding process requiring high-cost equipment investment and a soldering process with relatively high pollution, so that the electric connector has the characteristics of high production efficiency and stable and reliable electric connection; in the assembling and using process of a lamp adopting the lamp filament, the electric connection terminals of the lamp filament are not prone to being loosened due to stress, and the lamp filament has the advantages of being stable in product quality and long in service life.

Description

Technical Field

[0001] The utility model belongs to the technical field of lighting devices, and particularly relates to an LED filament with a riveted terminal and a lamp using the filament. Background Art

[0002] With the development of LED technology, LED lighting devices have been widely used, which has also put forward more requirements for the diversification of light colors, miniaturization of lamp bodies and use of arbitrary lengths. Especially in the application of ambient lights, this requires LED lamps to use more small-volume multi-color unit filaments in series and parallel. How to adapt to the rapid assembly and production of LED lamps and meet the diversification of LED lamp forms has become an important consideration in the design of unit filaments.

[0003] The electrical connection terminals of existing LED filaments are usually fixed by soldering, spot welding, etc., which have problems such as low welding efficiency, high equipment requirements, large environmental pollution, low electrical connection reliability, and limited product temperature resistance, which is not conducive to improving production efficiency and product quality. Utility Model Content

[0004] The utility model aims to provide an LED filament and a lamp with riveted terminals, which have the characteristics of stable electrical connection, low production equipment requirements, high production efficiency, no pollution, etc.

[0005] The utility model is realized by the following technical solutions:

[0006] The utility model provides an LED filament with a riveted terminal, comprising a substrate, on which a conductive circuit, a control chip, a light-emitting chip and an electrical connection terminal are arranged, the light-emitting chip is arranged on the conductive circuit, and the electrical connection terminal is electrically connected to the conductive circuit; one end of the electrical connection terminal is fixed on the substrate, and the other end is exposed outside the substrate, and the electrical connection terminal is fixedly connected to the end of the substrate by riveting;

[0007] Based on the above technical features, by connecting the electrical connection terminals to the substrate by riveting, there is no need to use high-cost spot welding equipment, nor is there any need to use soldering which is highly polluting. The overall production efficiency is high, and the electrical connection formed by the riveted structure is stable and reliable, especially in the process of using LED filaments to compose lamps, or in actual use, the electrical connection terminals can be effectively prevented from loosening due to force.

[0008] Preferably, when there is one electrical connection terminal connected to the single-side end of the substrate, the electrical connection terminal and the substrate form a double-sided wrapped riveted structure to improve the stability of the riveting;

[0009] Preferably, when there are two electrical connection terminals connected to the single-side end of the substrate, the electrical connection terminal and the substrate form a single-side wrapped riveted structure. This design allows two electrical connection terminals to be connected at the end of the substrate, providing a basis for a multi-circuit design of the conductive circuit.

[0010] Preferably, when there are two or more electrical connection terminals connected to the single-side end of the substrate, the end portion of the substrate is forked with multiple connection parts, the number of the connection parts is consistent with the number of the electrical connection terminals, and the electrical connection terminals form a double-sided wrapped riveted structure with the connection parts respectively. This design allows multiple electrical connection terminals to be connected at the end of the substrate to form a stable connection structure.

[0011] Preferably, there are four electrical connection terminals and they are respectively arranged at the ends on both sides of the substrate. The electrical connection terminals include a VDD terminal and a DIN terminal arranged at one end of the substrate, and a GND terminal and a DOUT terminal arranged at the other end of the substrate. This design allows the LED filament to be designed with independent positive voltage, negative voltage and signal control signals, thereby improving the reliability of the control signal and making the LED filament more convenient to weld when it is prepared into a lamp.

[0012] Furthermore, the control chip is a bare die control chip, and the control chip is directly arranged in the blank area of ​​the conductive circuit. This design can package the control chip together with the light emitting chip on the substrate to achieve miniaturization;

[0013] Furthermore, the light-emitting chips are arranged on the conductive circuit in a serial and / or parallel manner, and the light-emitting chips are flip chips, face-up chips, or bare chips to form different light-emitting circuits and color filaments.

[0014] Furthermore, the substrate is also coated with a dielectric layer, and the dielectric layer is a transparent dielectric layer or a transparent dielectric layer containing diffusion powder. The conductive circuit, control chip and light-emitting chip are jointly coated in the dielectric layer. This design forms effective protection for the conductive circuit, control chip and light-emitting chip through the dielectric layer, and further improves the connection stability between the electrical connection terminal and the substrate.

[0015] The utility model also provides a lamp, which comprises any one of the aforementioned LED filaments with riveted terminals.

[0016] Beneficial Effects

[0017] One of the above technical solutions has the following advantages or beneficial effects:

[0018] (1) The electrical connection terminals of the LED filament are connected to the substrate by riveting, replacing the high-cost spot welding process and the highly polluting soldering process, which has the characteristics of high production efficiency and stable and reliable electrical connection.

[0019] (2) The LED filament is used to form the lamp, which can effectively prevent the electrical connection terminal from loosening during assembly or use, thereby forming an LED lamp with stable quality and long service life. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Other features, objects and advantages of the present invention will become more apparent by reading the detailed description of non-limiting embodiments with reference to the following drawings:

[0021] Figure 1 This is a schematic diagram of the structure of the first embodiment of the utility model;

[0022] Figure 2 This is a schematic diagram of the back of the riveted structure of the first embodiment of the utility model;

[0023] Figure 3 For this utility model Figure 1 AA cross-sectional diagram of ;

[0024] Figure 4 This is a schematic diagram of the structure of the second embodiment of the present utility model;

[0025] Figure 5 This is a schematic diagram of the back of the riveted structure of the second embodiment of the utility model;

[0026] Figure 6 This is a schematic diagram of the structure of the third embodiment of the present utility model;

[0027] Figure 7 This is a schematic diagram of the back side of the riveted structure of the third embodiment of the utility model;

[0028] In the figure: substrate 1; connecting portion 11; conductive circuit 2; control chip 3; light-emitting chip 4; electrical connection terminal 5; dielectric layer 6. DETAILED DESCRIPTION

[0029] The present invention is further described in detail below in conjunction with the embodiments, but the implementation manner of the present invention is not limited thereto.

[0030] Embodiment 1

[0031] like Figure 1 and Figure 2As shown, this embodiment proposes an LED filament with a riveted terminal, including a substrate 1, on which there are a conductive circuit 2, a control chip 3, a light-emitting chip 4 and an electrical connection terminal 5; the conductive circuit 2 is a circuit pattern printed on the substrate 1, and the light-emitting chip 4 is arranged on the conductive circuit 2 to form a light-emitting circuit. The conductive circuit 2 may include independently arranged positive voltage circuits, negative voltage circuits, signal output circuits, terminal connection circuits and light-emitting circuits to stably control the light emission of different light-emitting chips 4 with little interference, forming a relatively pure light source; the electrical connection terminal 5 is electrically connected to the conductive circuit 2, such as being connected to the terminal connection circuit.

[0032] There are four electrical connection terminals 5 and they are arranged at the ends on both sides of the substrate 1. The electrical connection terminals 5 include a VDD terminal and a DIN terminal arranged at one end of the substrate 1, and a GND terminal and a DOUT terminal arranged at the other end of the substrate 1, so that the LED filament has more convenient weldability when it is prepared into a lamp; one end of each of the electrical connection terminals 5 is fixed on the substrate 1, and the other end is exposed to the outside of the substrate 1, wherein the electrical connection terminal 5 is fixedly connected to the end of the substrate 1 by riveting and forms a single-sided wrapped riveted structure with the substrate.

[0033] The control chip 3 is a bare crystal control chip, which is directly arranged in the blank area of ​​the conductive circuit 2, so as to integrate the control chip and the light-emitting chip into an integrated package on the substrate to achieve miniaturization. The control chip 3 is provided with a positive voltage pin VDD, a negative voltage pin GND, a signal input pin DIN, and a signal output pin DOUT, and each pin is connected to the corresponding electrical connection terminal 5 through a terminal connection circuit; the light-emitting chip 4 is arranged on the conductive circuit 2 in series and / or in parallel, and the light-emitting chip 4 is a flip chip or a face-up chip or a bare crystal chip to form different light-emitting circuits to form a colored filament.

[0034] like Figure 3 As shown, the substrate 1 is further coated with a dielectric layer 6, and the dielectric layer 6 is a transparent dielectric layer or a transparent dielectric layer containing diffusion powder. The conductive circuit 2, the control chip 3 and the light-emitting chip 4 are jointly coated in the dielectric layer 6. This design forms effective protection for the conductive circuit 2, the control chip 3 and the light-emitting chip 4 through the dielectric layer 6, and further improves the connection stability between the electrical connection terminal 5 and the substrate 1.

[0035] Embodiment 2

[0036] like Figure 4 , 5 As shown, the LED filament with riveted terminals proposed in this embodiment is different from the first embodiment in that:

[0037] The end portion of the substrate 1 is forked with a plurality of connection portions 11, and the number of the connection portions 11 at each end is two; the number of the electrical connection terminals 5 is four and they are arranged at the ends on both sides of the substrate 1, that is, two electrical connection terminals 5 are respectively arranged at the two ends of the substrate 1, and the electrical connection terminals 5 and the connection portions 11 form a double-sided wrapped riveted structure (such as Figure 5 shown).

[0038] The other components, their connection relationships, positional relationships, etc. in this embodiment are the same as those in the first embodiment.

[0039] Embodiment 3

[0040] like Figure 6 , 7 As shown, the LED filament with riveted terminals proposed in this embodiment is different from the first or second embodiment in that:

[0041] The control chip 3 has only a positive voltage pin VDD and a negative voltage pin GND. Correspondingly, there are two electrical connection terminals 5, and the electrical connection terminals 5 are respectively arranged at two ends of the substrate 1. The electrical connection terminals 5 and the ends of the substrate 1 form a double-sided wrapped riveted structure.

[0042] The other components, their connection relationships, positional relationships, etc. in this embodiment are the same as those in the first or second embodiment.

[0043] Embodiment 4

[0044] The utility model also provides a lamp, which includes the LED filament with riveted terminals in the first, second or third embodiment, wherein the LED filament may be one or more filaments, and the connection method may be series connection, parallel connection or a combination of series and parallel connection.

[0045] The above description is only a preferred embodiment of the present invention and does not limit the technical scope of the present invention. Therefore, any minor modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention still fall within the protection scope of the present invention.

Claims

1. An LED filament with a riveted terminal, comprising a substrate (1), on which a conductive circuit (2), a control chip (3), a light-emitting chip (4) and an electrical connection terminal (5) are provided, wherein the light-emitting chip (4) is arranged on the conductive circuit (2), and the electrical connection terminal (5) is electrically connected to the conductive circuit (2), characterized in that: One end of the electrical connection terminal (5) is fixed on the substrate (1), and the other end is exposed outside the substrate (1); the electrical connection terminal (5) is fixedly connected to the end of the substrate (1) by riveting.

2. The LED filament with riveted terminals according to claim 1, characterized in that: When there is only one electrical connection terminal (5) connected to the single-side end of the substrate (1), the electrical connection terminal (5) and the substrate (1) form a double-sided wrapped riveted structure.

3. The LED filament with riveted terminals according to claim 1, characterized in that: When there are two electrical connection terminals (5) connected to the single-side end of the substrate (1), the electrical connection terminals (5) and the substrate (1) form a single-side wrapped riveted structure.

4. The LED filament with riveted terminals according to claim 1, characterized in that: When there are two or more electrical connection terminals (5) connected to a single-side end of the substrate (1), a plurality of connection portions (11) are forked at the end of the substrate (1), the number of the connection portions (11) is consistent with the number of the electrical connection terminals (5), and the electrical connection terminals (5) respectively form a double-sided wrapped riveted structure with the connection portions (11).

5. The LED filament with riveted terminals according to claim 1, characterized in that: The electrical connection terminals (5) are four and are arranged at the ends of both sides of the substrate (1). The electrical connection terminals (5) include a VDD terminal and a DIN terminal arranged at one end of the substrate (1), and a GND terminal and a DOUT terminal arranged at the other end of the substrate (1).

6. The LED filament with riveted terminals according to claim 1, characterized in that: The control chip (3) is a bare crystal control chip, and the control chip (3) is directly arranged in a blank area of ​​the conductive circuit (2).

7. The LED filament with riveted terminals according to claim 1, characterized in that: The light-emitting chip (4) is arranged on the conductive circuit (2) in a serial and / or parallel manner, and the light-emitting chip (4) is a flip chip, a face-up chip, or a bare chip.

8. The LED filament with riveted terminals according to claim 1, characterized in that: The substrate (1) is further coated with a dielectric layer, wherein the dielectric layer is a transparent dielectric layer or a transparent dielectric layer containing diffusion powder, and the conductive circuit (2), the control chip (3) and the light-emitting chip (4) are coated together in the dielectric layer.

9. A lamp, characterized in that: The LED filament with riveted terminals comprises the LED filament with riveted terminals as claimed in any one of claims 1 to 8.

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