CN219303694U

CN219303694U - Multicolor LED filament and filament light source

Info

Publication number: CN219303694U
Application number: CN202320271773.8U
Authority: CN
Inventors: 林成通; 朱颖颀
Original assignee: Zhejiang Inteled Optoeletronic Technology Co ltd
Current assignee: Zhejiang Inteled Optoeletronic Technology Co ltd
Priority date: 2023-02-21
Filing date: 2023-02-21
Publication date: 2023-07-04
Anticipated expiration: 2033-02-21

Abstract

Multicolor LED filament and filament light source relates to luminescent light source technical field, including the filament base plate, be provided with the luminescence chip cluster on the filament base plate, the luminescence chip cluster is provided with two at least strings, the luminescence chip cluster includes first chip cluster and second chip cluster, be provided with the fixed value resistance on the second chip cluster, the operating voltage of first chip cluster is higher than the operating voltage of second chip cluster. The utility model simplifies the filament circuit, improves the production efficiency of the filament, and can simplify the connection of the guide wire in the core column when the filament is welded, thereby having lower cost and high production efficiency.

Description

Multicolor LED filament and filament light source

Technical Field

The utility model relates to the technical field of luminous light sources, in particular to a multicolor LED filament and a filament light source.

Background

Along with the development of filament market, current filament lamp realizes polychromatic light mixing effect through the filament of different colours. There is certain interval between the filaments of different colours, and when adjusting luminance, the colour can not mix completely, causes to mix the back effect relatively poor, can not satisfy people's demand.

For example, chinese patent CN202123169906.0 discloses a plug-in filament, and includes a built-in control IC chip, a white light circuit, a red light circuit, a green light circuit, and a blue light circuit disposed on a substrate; the built-in control IC chip is provided with a plurality of pins, including a white light control pin, a red light control pin, a green light control pin, a blue light control pin and the like, and has the advantages of complex circuit structure, high production cost and low production efficiency.

Therefore, there is a need to develop multicolor LED filaments and filament light sources to solve the problems in the prior art.

Disclosure of Invention

The utility model aims to provide a multicolor LED filament and a filament light source, which solve the problems of low production efficiency and high manufacturing cost in the background technology by arranging a fixed value resistor on one light-emitting chip string and enabling the working voltage of the fixed value resistor to be lower than the working voltage of other light-emitting chip strings in the same group so as to be convenient for adjusting different color temperatures through the same filament electrode.

In order to achieve the above purpose, the present utility model provides the following technical solutions:

the multicolor LED filament comprises a filament substrate, wherein a light-emitting chip string is arranged on the filament substrate, the light-emitting chip string is at least provided with two strings, the light-emitting chip string comprises a first chip string and a second chip string, a fixed value resistor is arranged on the second chip string, and the working voltage of the first chip string is higher than that of the second chip string.

Further, the positive electrode of the first chip string and the positive electrode of the second chip string are both connected to one filament electrode, and the negative electrode of the first chip string and the negative electrode of the second chip string are both connected to the other filament electrode.

Further, the LED lamp further comprises a third chip string, wherein the negative electrode of the third chip string and the positive electrode of the second chip string are connected to the same filament electrode, and the positive electrode of the third chip string and the negative electrode of the second chip string are also connected to the same filament electrode.

Further, the LED lamp further comprises a fourth chip string, the positive electrode of the fourth chip string and the positive electrode of the third chip string are connected to the same filament electrode, the negative electrode of the fourth chip string and the negative electrode of the third chip string are also connected to the same filament electrode, and a fixed value resistor is arranged on the third chip string or the fourth chip string.

Further, the operating voltage of the light emitting chip string provided with the constant value resistor is lower than the operating voltage of the same-direction light emitting chip string not provided with the constant value resistor.

Further, the light emitting chip string includes a plurality of LED chips, and the plurality of LED chips are electrically connected.

Further, the lamp filament comprises a lamp filament substrate, and the lamp filament substrate comprises a lamp filament string, wherein the lamp filament substrate is provided with a lamp filament, and the lamp filament substrate is provided with a fluorescent glue layer.

Further, the front adhesive layer comprises a first adhesive layer and a second adhesive layer, wherein the first adhesive layer covers one or more light-emitting chip strings, and the second adhesive layer covers other light-emitting chip strings.

Further, the fluorescent glue layer further comprises a back glue layer arranged on the back of the filament substrate.

The filament light source comprises the multicolor LED filament.

Compared with the prior art, the utility model has the beneficial effects that: the working voltage of the second chip string provided with the fixed value resistor is lower than the working voltage of the first chip string, so that the positive electrode of the first chip string and the positive electrode of the second chip string are both connected to one filament electrode, and when the negative electrode of the first chip string and the negative electrode of the second chip string are both connected to the other filament electrode, the light emission of the first chip string and the second chip string can be controlled by adjusting the current at two ends of the filament. Compared with the mode that each light-emitting chip string needs to be controlled by corresponding different pins, the utility model reduces the number of control pins, simplifies the filament circuit, simplifies the production process of the filament, improves the production efficiency of the filament, and can simplify the connection of the guide wires in the core column when the filament is welded, thereby having lower cost and high production efficiency.

Other features and advantages of the present utility model will be disclosed in the following detailed description of the utility model and the accompanying drawings.

Drawings

FIG. 1 is a schematic diagram of the structure of the present utility model;

FIG. 2 is a structural circuit diagram of the present utility model;

FIG. 3 is a graph of current distribution when the present utility model is lit;

FIG. 4 is a schematic view of the structure of the present utility model after dispensing;

FIG. 5 is a cross-sectional view of the present utility model after dispensing;

FIG. 6 is a schematic view of a structure after dispensing according to another embodiment;

fig. 7 is a cross-sectional view of another embodiment after dispensing.

The figure indicates: the reference numerals in the drawings are as follows: 1. a filament substrate; 21. a first chip string; 22. a second chip string; 23. a third chip string; 24. a fourth chip string; 31. a fixed value resistor I; 32. a fixed-value resistor II; 4. a metal wire; 5. a first electrode; 6. a second electrode; 7. a front adhesive layer; 71. a first adhesive layer; 72. a second adhesive layer; 8. and a reverse adhesive layer.

Detailed Description

The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

In the present utility model, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communicated with the inside of two elements or the interaction relationship of the two elements. The specific meaning of the above terms in the present utility model can be understood by those of ordinary skill in the art according to the specific circumstances.

The multicolor LED filament comprises a filament substrate 1, wherein a light emitting chip string is arranged on the filament substrate 1, at least two light emitting chip strings are arranged on the light emitting chip string, each light emitting chip string comprises a first chip string 21 and a second chip string 22, the positive electrode of the first chip string 21 and the positive electrode of the second chip string 22 are connected on the same filament electrode, and the negative electrode of the first chip string 21 and the negative electrode of the second chip string 22 are also connected on the other filament electrode.

Alternatively, the second chip string 22 may be provided with a fixed resistor, and the first chip string 21 may not be provided with a fixed resistor. The operating voltage of the first chip string 21 is higher than the operating voltage of the second chip string 22. The operating voltage of the chip string provided with the fixed value resistor is lower than that of the chip string not provided with the fixed value resistor.

The LED lamp further comprises a third chip string 23, wherein the negative electrode of the third chip string 23 and the positive electrode of the second chip string 22 are connected to the same filament electrode, and the positive electrode of the third chip string 23 and the negative electrode of the second chip string 22 are also connected to the same filament electrode.

The LED lamp further comprises a fourth chip string 24, wherein the positive electrode of the fourth chip string 24 and the positive electrode of the third chip string 23 are connected to the same filament electrode, the negative electrode of the fourth chip string 24 and the negative electrode of the third chip string 23 are also connected to the same filament electrode, and a fixed value resistor is arranged on the third chip string 23 or the fourth chip string 24.

As shown in fig. 2, the anodes of the first chip string 21 and the second chip string 22 are both connected to the second electrode 6, and the cathodes of the first chip string 21 and the second chip string 22 are both connected to the first electrode 5. The second chip string 22 is connected in series with a constant resistor 31, and the working voltage of the second chip string 22 is lower than that of the first chip string 21. The positive electrodes of the third chip string 23 and the fourth chip string 24 are connected to the first electrode 5, and the negative electrodes of the third chip string 23 and the fourth chip string 24 are connected to the second electrode 6. The third chip string 23 is connected in series with a second fixed value resistor 32, and the working voltage of the third chip string 23 is lower than the working voltage of the fourth chip string 24.

The positive and negative wiring directions of the first chip string 21 and the second chip string 22 and the positive and negative wiring directions of the third chip string 23 and the fourth chip string 24 are opposite, so that a user can control the light emission of the first chip string 21 and the second chip string 22 or the third chip string 23 and the fourth chip string 24 by adjusting the input current direction.

The light-emitting chip string comprises a plurality of LED chips, and the LED chips can be connected through metal wires 4.

The LED chip comprises a forward chip, a flip chip or a vertical chip and the like, and the color of the LED chip comprises a blue chip, a red chip or a green chip and the like.

As shown in fig. 4 and 5, the light-emitting chip string further comprises a fluorescent glue layer, wherein the fluorescent glue layer comprises a front glue layer 7 arranged on the front face of the filament substrate 1, and the front glue layer 7 covers the light-emitting chip string. Optionally, the front adhesive layer 7 is provided with one layer or more. As shown in fig. 6 and 7, in another embodiment, the front adhesive layer 7 may include a first adhesive layer 71 and a second adhesive layer 72, where the first adhesive layer 71 covers one or more light emitting chip strings, and the second adhesive layer 72 covers other light emitting chip strings. The other light emitting chip strings refer to all or part of the light emitting chip strings not covered by the first adhesive layer 71.

Optionally, the fluorescent glue layer further comprises a back glue layer arranged on the back of the filament substrate 1.

The front surface of the filament substrate 1 is the surface provided with the LED chip.

The material of the filament substrate 1 comprises ceramics, sapphire, MCPCB, FPC or other flexible materials.

The filament light source comprises the multicolor LED filament. The current regulating device comprises a current magnitude regulating device and a current direction regulating device.

The utility model provides a multicolor LED filament and a filament light source, which have simple structure, convenient use and high reliability.

It will be evident to those skilled in the art that the utility model is not limited to the details of the foregoing illustrative embodiments, and that the present utility model may be embodied in other specific forms without departing from the spirit or essential characteristics thereof. The present embodiments are, therefore, to be considered in all respects as illustrative and not restrictive, the scope of the utility model being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.

Furthermore, it should be understood that although the present disclosure describes embodiments, not every embodiment is provided with a separate embodiment, and that this description is provided for clarity only, and that the disclosure is not limited to the embodiments described in detail below, and that the embodiments described in the examples may be combined as appropriate to form other embodiments that will be apparent to those skilled in the art.

Claims

1. The multicolor LED filament is characterized by comprising a filament substrate, wherein a light-emitting chip string is arranged on the filament substrate, the light-emitting chip string is at least provided with two strings, the light-emitting chip string comprises a first chip string and a second chip string, a fixed value resistor is arranged on the second chip string, and the working voltage of the first chip string is higher than that of the second chip string.

2. The multi-color LED filament of claim 1, wherein the positive electrode of the first chip string and the positive electrode of the second chip string are both connected to one filament electrode, and the negative electrode of the first chip string and the negative electrode of the second chip string are both connected to the other filament electrode.

3. The multi-color LED filament of claim 2, further comprising a third chip string, wherein the negative electrode of the third chip string is connected to the same filament electrode as the positive electrode of the second chip string, and wherein the positive electrode of the third chip string is also connected to the same filament electrode as the negative electrode of the second chip string.

4. The multi-color LED filament according to claim 3, further comprising a fourth chip string, wherein the positive electrode of the fourth chip string and the positive electrode of the third chip string are connected to the same filament electrode, the negative electrode of the fourth chip string and the negative electrode of the third chip string are also connected to the same filament electrode, and a constant value resistor is provided on the third chip string or the fourth chip string.

5. The multicolor LED filament according to claim 4, wherein the operating voltage of the light emitting chip string provided with the constant value resistor is lower than the operating voltage of the same-directional light emitting chip string not provided with the constant value resistor.

6. The multi-color LED filament of any of claims 1-5, wherein the light emitting chip string comprises a plurality of LED chips, the plurality of LED chips being electrically connected.

7. The multi-color LED filament of claim 6, further comprising a phosphor paste layer comprising a front paste layer disposed on a front face of the filament substrate, the front paste layer overlying the light emitting chip string.

8. The multi-color LED filament of claim 7, wherein the front side glue layer comprises a first glue layer overlying one or more of the light emitting chip strings and a second glue layer overlying the other light emitting chip strings.

9. The multi-color LED filament of claim 7, wherein the phosphor paste layer further comprises a backside paste layer disposed on the backside of the filament substrate.

10. Filament light source, characterized in that it comprises a polychromatic LED filament according to any of claims 1-9.