CN111578167A - LED light bar and its manufacturing method, LED light bar assembly and lamps - Google Patents

Abstract

The application provides an LED light bar, a lamp, an LED light bar assembly and a manufacturing method of the LED light bar. This LED lamp strip includes: a substrate; and a plurality of monochromatic LED filaments, be fixed in on the base plate, every monochromatic LED filament all includes a plurality of LED chips for send monochromatic light, every the surface of monochromatic LED filament all coats and has fluorescent glue, wherein, a plurality of monochromatic LED filaments are in arrange side by side on the base plate, all have the partition area between every two adjacent monochromatic LED filaments, so that the monochromatic LED filament of partition area both sides separates each other, and does not contact each other between the fluorescent glue of the surface of monochromatic LED filament.

Description

LED light bar and its manufacturing method, LED light bar assembly and lamps

technical field

The present application relates to the technical field of lighting, and in particular, to an LED light bar, a lamp, an LED light bar assembly, and a manufacturing method of the LED light bar.

Background technique

LED (Light Emitting Diode, light-emitting diode) is a solid-state semiconductor device that can convert electrical energy into visible light, which can directly convert electricity into light. In recent years, LEDs have been used more and more widely in the field of lighting due to their advantages of energy saving and long service life.

In order to achieve rich color effects, LED chips of different colors can be integrated together to emit a combination of light of different colors in one lamp. In the prior art, a plurality of single-color LED chips can be strung together in a row, and a corresponding color of fluorescent glue can be coated on their outer surfaces to make a single-color LED filament. Arrange multiple colors of LED filaments side by side to achieve colorful lighting effects.

However, due to the limitation of the light emitting angle of each LED filament, there is mutual interference between each LED filament, resulting in the phenomenon of mutual refraction, doping and mixing of two light colors. Moreover, corresponding to the position of a certain LED filament, the color of the LED filament may not be prominent, so the soft change of pure light color cannot be effectively achieved, and the color temperature of the lamp will fluctuate greatly, color tolerance, light color Consistency is not stable.

SUMMARY OF THE INVENTION

In order to solve the above problems in the prior art, the present application provides an LED light bar, a lamp, an LED light bar assembly, and a manufacturing method of the LED light bar.

According to one aspect of the present application, an LED light bar is provided, comprising:

substrate; and

A plurality of single-color LED filaments are fixed on the substrate, each of the single-color LED filaments includes a plurality of LED chips for emitting single-color light, and the outer surface of each single-color LED filament is coated covered with fluorescent glue,

Wherein, the plurality of single-color LED filaments are arranged side by side on the substrate, and there is a separation area between each adjacent two single-color LED filaments, so that the single-color LED filaments on both sides of the separation area are mutually spaced apart, and the fluorescent glues on the outer surfaces of the monochromatic LED filaments do not contact each other.

According to one embodiment, the width of the separation area is greater than or equal to 0.2 mm.

According to one embodiment, the LED light bar further includes:

The separation barrier is located in the separation area and has a preset height, and the preset height is adjacent to or equal to the height of the single-color LED filament on the substrate.

According to one embodiment, the separation barrier is made of transparent material.

According to one embodiment, the separation barrier is made of an opaque material.

According to one embodiment, a common anode is provided on one side of the substrate, the common anode is electrically connected to one end of each of the single-color LED filaments, and a plurality of independent electrodes are provided on the other side of the substrate A negative electrode, the plurality of negative electrodes are respectively electrically connected to the other ends of the plurality of single-color LED filaments; or

A common negative electrode is provided on one side of the substrate, the common negative electrode is electrically connected to one end of each of the single-color LED filaments, and a plurality of positive electrodes independent of each other are provided on the other side of the substrate. The positive electrodes are respectively electrically connected to the other ends of the plurality of single-color LED filaments.

According to one embodiment, the plurality of single-color LED filaments have different colors.

According to one embodiment, the plurality of single-color LED filaments respectively emit at least two kinds of red light, green light, blue light, cold light, and warm light.

According to another aspect of the present application, a light fixture is provided, comprising:

a lamp holder with positive and negative electrodes disposed at the top; and

The above LED light bar, wherein the substrate is a flexible transparent substrate, the two ends of the light bar are respectively electrically connected to the positive and negative electrodes of the lamp holder, and are wound upward in a spiral form, and the The front faces outward.

According to another aspect of the present application, there is provided an LED light bar assembly, comprising at least two LED light bars as described above, wherein the at least two LED light bars respectively comprise LED filaments of different colors, and each comprises a quantity Same or different LED filaments.

According to another aspect of the present application, an LED light bar assembly is provided, comprising:

at least one LED light bar as described above; and

At least one single-color LED filament, the color of the at least one single-color LED filament is different from the color of the LED filaments in the LED light bar.

According to another aspect of the present application, there is provided a method for manufacturing an LED light bar as described above, comprising:

Fix a plurality of LED chips on the substrate, and make the LED chips with the same color in the same row, and the LED chips with different colors are spaced apart from each other;

A fluorescent glue is coated on the substrate to cover the LED chips in each row, and a separation area is provided between the fluorescent glue covered on the LED chips in two adjacent rows.

According to one embodiment, the method further includes:

A separation barrier is provided within the separation zone.

According to one embodiment, the separation barrier is made of transparent material.

According to one embodiment, the separation barrier is made of an opaque material.

Therefore, due to the existence of the separation area, the fluorescent glues between the adjacent LED filaments will not contact each other, so the light emitted by the adjacent LED filaments will not interfere with and mix with each other. In particular, when each LED filament has different colors (ie, emits light of different colors), the mutual interference of color and color temperature will not occur between adjacent LED filaments, so that at the position corresponding to a certain LED filament, the filament The color can be highlighted to achieve a soft change of pure light color, and achieve a full-color filament light source that emits no color cast.

Description of drawings

In order to illustrate the technical solutions in the embodiments of the present application more clearly, the following briefly introduces the drawings that are used in the description of the embodiments. Obviously, the drawings in the following description are only some embodiments of the present application. For those of ordinary skill in the art, other drawings can also be obtained from these drawings without creative effort.

1 and 2 show schematic diagrams of an LED light bar according to an embodiment of the present application.

FIG. 3 shows a partial enlarged schematic view of two adjacent monochromatic LED filaments and the separation area therebetween according to an embodiment of the present application.

FIG. 4 shows a partial enlarged schematic view of two adjacent monochromatic LED filaments and the separation area therebetween according to an embodiment of the present application.

Figures 5 and 6 show another embodiment of the LED light bar shown in Figures 1 and 2, respectively.

FIG. 7 shows a schematic circuit diagram of the LED light bar shown in FIGS. 5 and 6 .

Figure 8 shows a schematic diagram of flip-chip LED chips in an LED strip.

Figure 9 shows a perspective view of a light fixture according to an embodiment of the present application.

FIG. 10 shows a flowchart of a method for manufacturing an LED light bar according to an embodiment of the present application.

FIG. 11 shows a flowchart of a method for manufacturing an LED light bar according to another embodiment of the present application.

Detailed ways

In order to better understand the technical solutions and advantages of the present application, the content of the present application will be further described in detail below with reference to the accompanying drawings and specific embodiments. However, the specific embodiments described herein are only used to explain the present application, and are not intended to limit the present application. In addition, the technical features involved in the various embodiments of the present application described below can be used in combination unless they conflict with each other, thereby constituting other embodiments within the scope of the present application.

What is described below provides many different implementations or examples for implementing different structures of the present application. To simplify the disclosure of the present application, the components and arrangements of specific examples are described below. Of course, they are only examples and are not intended to limit the application. Furthermore, this application may repeat reference numerals and/or reference letters in different instances for the purpose of simplicity and clarity, and does not in itself indicate a relationship between the various embodiments and/or arrangements discussed.

1 and 2 show schematic diagrams of an LED light bar according to an embodiment of the present application. As shown in FIGS. 1 and 2 , the LED light bar 100 may include a substrate 110 and a plurality of single-color LED filaments 120 . The single-color LED filaments 120 are arranged side by side and fixed on the substrate 110 . The substrate 110 may be a hard board made of metal, ceramics, etc., or a flexible printed circuit made of polyimide resin (Polyimide, PI for short), Bismaleimide Triazine (Bismaleimide Triazine, BT for short), etc. (Flexible Printed Circuit, referred to as FPC) soft board.

Referring to FIG. 2 , each LED filament 120 may include a plurality of LED chips 121 for emitting monochromatic light. The LED chip 121 can be fixed on the metal circuit of the substrate 110 by conductive glue or solder to form a circuit connection, or can also be fixed on the substrate 110 by an insulating glue, and then the circuit connection can be formed by a metal wire. The outer surface of each LED filament 120 is coated with fluorescent glue to form the LED filament 120 as shown in FIG. 1 , so that each monochromatic LED filament can emit uniform monochromatic light. It can be understood that, in order to emit light of different colors, the colors of the LED chip and the fluorescent glue can be appropriately selected to emit light of various colors, for example, light such as RGBCW, which is common in the lighting field.

Between every two adjacent single-color LED filaments 120, there is a separation area 130, so that the single-color LED filaments 120 on both sides of the separation area 130 are spaced apart from each other, and are coated on the outer surface of the single-color LED filament 120. The fluorescent glues do not touch each other.

Therefore, due to the existence of the separation area, the fluorescent glues between the adjacent LED filaments will not contact each other, so the light emitted by the adjacent LED filaments will not interfere with and mix with each other. In particular, when each LED filament has different colors (ie, emits light of different colors), the mutual interference of color and color temperature will not occur between adjacent LED filaments, so that at the position corresponding to a certain LED filament, the filament The color can be highlighted to achieve a soft change of pure light color, and achieve a full-color filament light source that emits no color cast.

FIG. 3 shows a partial enlarged schematic view of two adjacent monochromatic LED filaments and the separation area therebetween according to an embodiment of the present application. As shown in FIG. 3 , there is a separation area 130 between two adjacent single-color LED filaments 120 . According to one embodiment, the width W of the separation region 130 is greater than or equal to 0.2 mm. Therefore, the width of the separation area is enough so that the fluorescent glues coated on the outer surfaces of the LED filaments on both sides do not contact each other, and can also be separated by a certain distance, so as to avoid light interference and interference between adjacent LED filaments. mixed.

FIG. 4 shows a partial enlarged schematic view of two adjacent monochromatic LED filaments and the separation area therebetween according to an embodiment of the present application. As shown in FIG. 4 , a separation barrier 140 may be disposed within the separation region 130 to further physically separate the two adjacent LED filaments 120 . The height of the separation barrier 140 on the substrate 110 is equal to, ie approximately or equal to, the height of the LED filaments 120 on the substrate 110 , so that light interference between two adjacent LED filaments can be effectively prevented.

According to one embodiment, the separation barrier 140 may be made of a transparent material, eg, a material such as transparent glue, glass, may be formed on the substrate 110 by a physical or chemical method. The transparent separation barrier 140 can reduce the blocking and absorption of the outgoing light, thereby improving the luminous efficiency and luminous angle of the entire device.

According to another embodiment, the separation barrier 140 may be made of an opaque material, eg, a material such as ink, metal, may be printed on the substrate 110 by physical or chemical methods. The opaque separation barrier 140 can almost completely block light interference between two adjacent LED filaments, so that the LED strip has better monochromatic performance, more pure light color, and a spectrum closer to a pure color spectrum.

Fig. 5 and Fig. 6 respectively show another embodiment of the LED light bar shown in Fig. 1 and Fig. 2, Fig. 5 and Fig. 6 are different from Fig. 1 and Fig. 2 in that in Fig. 5 and Fig. 6 The specific configuration of the positive and negative poles of the LED strip is shown. For the sake of brevity, only the differences between the embodiment shown in FIGS. 5 and 6 and those of FIGS. 1 and 2 will be described below, and the detailed description of the similarities will be omitted.

In FIGS. 5 and 6 , the left end of the light bar 100 is the positive electrode, and the right end is the negative electrode. As shown in FIG. 5 and FIG. 6 , a single common positive electrode 111 is provided on one side of the substrate 110 , and a plurality of negative electrodes 112 independent of each other are provided on the other side. The common positive electrode 111 is electrically connected to one end of each single-color LED filament 120 . , the plurality of negative electrodes 112 are respectively electrically connected to the other ends of the plurality of single-color LED filaments 120 . In this way, the problem of excessive solder joints due to the independent positive and negative poles of each LED filament can be solved, which is easy to produce virtual soldering and/or desoldering, and the reduction in the number of solder joints is also conducive to improving production efficiency. . According to the embodiments shown in FIGS. 5 and 6 , a plurality of single-color LED filaments have a single common anode, which reduces the number of solder joints on the one hand, thereby reducing the risk of false soldering and desoldering and improving production efficiency, and on the other hand On the one hand, on the negative side, each LED filament still has an independent negative electrode, so that the different colors of light emitted by each LED filament can be individually controlled by controlling the electrical signal of each LED filament, so as to realize the control of color, light intensity and control of its distribution.

It can be understood that the light bar 100 can also be configured to have a single common negative electrode and a plurality of positive electrodes independent of each other, which can also achieve similar effects to the embodiments shown in FIG. 5 and FIG. 6 .

FIG. 7 shows a schematic circuit diagram of the LED light bar shown in FIGS. 5 and 6 . As shown in FIG. 7 , the positive electrode in the LED light bar 100 is in the form of a common positive electrode, and the negative electrode is in the form of a plurality of negative electrodes independent of each other. Each LED filament 120 in the LED light bar 100 forms an independent conduction circuit .

In the above embodiments shown in FIG. 2 and FIG. 6 , the method of directly mounting the LED chips is adopted, but the present application is not limited to this.

Figure 8 shows a schematic diagram of flip-chip LED chips in an LED strip. As shown in FIG. 8 , each LED chip in the LED light bar can be flip-chipped according to actual needs, and a similar effect can also be achieved when the present application is applied to a front-mounted LED chip.

According to an embodiment of the present application, the plurality of single-color LED filaments 120 in the LED light bar 100 may have different colors, so as to realize multi-color toning. In addition, the plurality of single-color LED filaments 120 of the LED light bar 100 may emit at least two of red light, green light, blue light, cold light, and warm light (ie, RGBCW), respectively. According to the embodiments of the present application, visible light with different color temperatures or different colors will be emitted by the excitation of the fluorescent glue and the LED chip itself. The main wavelength range of light emission is 510-540nm, and the wavelength range of mixed visible light is 400-660nm; at the same time, it can adjust the range of Ra0-98, CCT1000K-8000K white light.

Figure 9 shows a perspective view of a light fixture according to an embodiment of the present application. In order to clearly show the internal structure of the lamp, structures such as the casing of the lamp are omitted in FIG. 9 . As shown in FIG. 9 , the light fixture 200 may include a socket 210 and the LED light bar 100 as described above. The lamp holder 210 is provided with a positive electrode 211 and a negative electrode 212 at the top end, and two ends of the LED light bar 100 are respectively electrically connected to the positive electrode 211 and the negative electrode 212 of the lamp holder 210 to realize circuit conduction. In this embodiment, the substrate 110 of the LED light bar 100 is a flexible transparent substrate, so that both ends of the LED light bar 100 can be wound upward in a spiral form, and the front surface of the substrate 110 faces the outside. In this way, the advantages of the LED light bar of the present application can be fully utilized, and all-round dimming and color lighting can be realized by spiral winding.

According to another embodiment of the present application, an LED light bar assembly is provided, which may include at least two LED light bars as described above, the at least two LED light bars respectively include LED filaments of different colors, and respectively include a number of LED light bars. Same or different LED filaments. For example, the LED light bar assembly may include two LED light bars, one of which contains three LED filaments of red, green and blue, and the other light bar contains two LED filaments of cold light and warm light, namely "3+ 2" combination. According to different requirements, it can also be designed into "2+2" combination, "2+2+3" combination and so on. As a result, the color and light intensity adjustment can be more flexibly realized according to different lighting requirements.

According to another embodiment of the present application, an LED light bar assembly is provided, which may include at least one LED light bar as described above and at least one single-color LED filament, the color of the single-color LED filament being the same as the color of the LED light bar. Filaments are different colors. For example, the LED light bar assembly may include a red LED filament and an LED light bar, and the LED light bar includes two LED filaments of cold light and warm light, that is, a "1+2" combination. According to different requirements, it can also be designed into "1+3" combination, "1+2+2" combination and so on.

FIG. 10 shows a flowchart of a method for manufacturing an LED light bar according to an embodiment of the present application. As shown in FIG. 10 , the method 300 may include steps S310 and S320.

In step S310, a plurality of LED chips are fixed on the substrate, and the LED chips of the same color are located in the same row, and the LED chips of different colors are arranged to be spaced apart from each other. According to the arrangement of the LED chips in this step, the same row of LED chips with the same color can form a single-color LED filament in a subsequent step, and different LED filaments are spaced apart from each other.

In step S320, a fluorescent glue is coated on the substrate to cover the LED chips located in each row, and a separation area is formed between the fluorescent glue covered on the LED chips of two adjacent rows. In this step, any suitable dispensing equipment can be used to coat the fluorescent glue on the LED chip, and the spacing between the fluorescent glues on the surfaces of every two adjacent LED filaments needs to be precisely controlled to form a separation area, so that the There is no contact between fluorescent glues on adjacent filament surfaces.

In this way, the LED light bar described in the above embodiment is formed, and between the LED filaments, a separation area is provided, so that the fluorescent glue between the adjacent LED filaments will not contact each other, so the adjacent LED filaments are not in contact with each other. The light emitted by the LED filament will not interfere and mix with each other.

FIG. 11 shows a flowchart of a method for manufacturing an LED light bar according to another embodiment of the present application. As shown in FIG. 11, in addition to steps S310 and S320, the method 300 may further include step S330. For the sake of brevity, only the differences between FIG. 11 and FIG. 10 will be described below, and the detailed description of the similarities will be omitted.

In step S330, a separation barrier is set in the separation area. Thereby, two adjacent LED filaments can be further physically separated. The height of the separation barrier on the substrate can be equal to the height of the LED filament on the substrate, that is, approximately or the same, so that light interference between two adjacent LED filaments can be effectively prevented. The separation barrier can be made of transparent materials such as transparent glue, glass, etc., and can also be made of opaque materials such as ink, metal, and the like.

In the above-mentioned embodiments, the description of each embodiment has its own emphasis. For parts that are not described in detail in a certain embodiment, reference may be made to the relevant descriptions of other embodiments. The technical features of the above embodiments can be combined arbitrarily. For the sake of brevity, all possible combinations of the technical features in the above embodiments are not described. However, as long as there is no contradiction in the combination of these technical features, it should be It is considered to be the range described in this specification.

The embodiments of the present application are described in detail above, and specific examples are used herein to illustrate the principles and implementations of the present application. The descriptions of the above embodiments are only used to help understand the methods and core ideas of the present application. Meanwhile, any changes or deformations made by those skilled in the art based on the ideas of the present application and the specific embodiments and application scope of the present application fall within the protection scope of the present application. In conclusion, the content of this specification should not be construed as a limitation on the present application.

Claims (10)

1. An LED light bar, comprising: substrate; and A plurality of single-color LED filaments are fixed on the substrate, each of the single-color LED filaments includes a plurality of LED chips for emitting single-color light, and the outer surface of each single-color LED filament is coated covered with fluorescent glue, Wherein, the plurality of single-color LED filaments are arranged side by side on the substrate, and there is a separation area between each adjacent two single-color LED filaments, so that the single-color LED filaments on both sides of the separation area are mutually spaced apart, and the fluorescent glues on the outer surfaces of the monochromatic LED filaments do not contact each other. 2. The LED light bar of claim 1, wherein a width of the separation area is greater than or equal to 0.2 mm. 3. The LED light bar of claim 1, further comprising: The separation barrier is located in the separation area and has a preset height, and the preset height is adjacent to or equal to the height of the single-color LED filament on the substrate. 4. The LED light bar of claim 3, wherein the separation barrier is made of a transparent material. 5. The LED light bar of claim 3, wherein the separation barrier is made of an opaque material. 6. The LED light bar of claim 1, wherein A common anode is provided on one side of the substrate, the common anode is electrically connected to one end of each of the single-color LED filaments, and a plurality of independent negative electrodes are provided on the other side of the substrate. the negative electrodes are respectively electrically connected to the other ends of the plurality of single-color LED filaments; or A common negative electrode is provided on one side of the substrate, the common negative electrode is electrically connected to one end of each of the single-color LED filaments, and a plurality of positive electrodes independent of each other are provided on the other side of the substrate. The positive electrodes are respectively electrically connected to the other ends of the plurality of single-color LED filaments. 7. The LED light bar of claim 1, wherein the plurality of single-color LED filaments are of different colors. 8. The LED light bar of claim 7, wherein the plurality of single-color LED filaments emit at least two of red light, green light, blue light, cold light, and warm light, respectively. 9. A light fixture comprising: a lamp holder with positive and negative electrodes disposed at the top; and The LED light bar according to any one of claims 1-8, wherein the substrate is a flexible transparent substrate, and two ends of the light bar are respectively electrically connected to the positive and negative electrodes of the lamp socket, and are spirally connected to each other. The form is wound up with the front side of the substrate facing the outside. 10. An LED light bar assembly, comprising at least two LED light bars according to any one of claims 1-8, wherein the at least two LED light bars respectively comprise LED filaments of different colors, and respectively comprise Same or different number of LED filaments.

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