CN209782273U

CN209782273U - LED filament and bulb

Info

Publication number: CN209782273U
Application number: CN201920343528.7U
Authority: CN
Inventors: 高延增; 蒋洪奎
Original assignee: Zhangzhou Lidaxin Optoelectronic Technology Co ltd
Current assignee: Zhangzhou Lidaxin Optoelectronic Technology Co ltd
Priority date: 2019-03-18
Filing date: 2019-03-18
Publication date: 2019-12-13
Anticipated expiration: 2029-03-18

Abstract

The utility model provides a LED filament, include: a substrate that is plastically deformable by an external force; the first LED light source is arranged on one surface of the substrate; and the second LED light source is arranged on the other surface of the substrate. The utility model also provides a bulb, including above-mentioned LED filament. The utility model provides a LED filament and bulb not only can be crooked and folding, and its cost of manufacture is low, can also realize two-sided luminous simultaneously to reach the luminous effect of realizing the incandescent lamp.

Description

LED filament and bulb

Technical Field

The utility model belongs to the technical field of the illumination, more specifically say, relate to a LED filament and bulb.

Background

At present, the filament substrate of the filament lamp is mainly made of rigid materials, such as ceramic, sapphire and the like, and the filament lamp cannot be bent and folded in various ways, is single in shape and is not suitable for replacing the application scene of decorative incandescent lamps. In order to solve the problem, some LED manufacturers have introduced flexible filament of FPC (flexible circuit board) + flip chip, however, to use this kind of filament design model, special core column needs to be used, and a large amount of molybdenum wires need to be added for fixation, and the labor cost therein is not a little amount, so in a short time, this kind of filament scheme cannot cover the market in large quantities.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a LED filament to solve the filament single and the high technical problem of cost of manufacture that exist among the prior art.

In order to achieve the above object, the utility model adopts the following technical scheme: provided is an LED filament, including:

a substrate that is plastically deformable by an external force;

The first LED light source is arranged on one surface of the substrate;

And the second LED light source is arranged on the other surface of the substrate.

Preferably, the substrate is made of a metal material, a first insulating layer is laid on one surface of the substrate, and a second insulating layer is laid on the other surface of the substrate.

Preferably, the first LED light source and the second LED light source are controlled independently of each other.

Furthermore, the substrate is provided with two groups of external terminals which are respectively used for the first LED light source and the second LED light source to be externally connected.

Preferably, the first LED light source and the second LED light source are connected in series or in parallel with each other.

Furthermore, a group of external terminals is arranged on the substrate, and the external terminals are used for connecting the first LED light source and the second LED light source in series or in parallel and then are externally connected.

Further, the first LED light source includes a first conductive circuit printed or pressed on the first insulating layer, and first LED chips disposed on the first conductive circuit, and the first LED chips are connected in series and/or in parallel; the second LED light source comprises a second conductive circuit printed or pressed on the second insulating layer and second LED chips arranged on the second conductive circuit, and the second LED chips are mutually connected in series and/or in parallel.

further, the first LED chip is soldered on the first conductive trace by solder paste or silver paste; and the second LED chip is welded on the second conductive circuit through solder paste or silver paste.

Further, a first photoresist layer prepared with fluorescent powder is coated on the first LED chip and the first conductive circuit; and a second photoresist layer prepared with fluorescent powder is coated on the second LED chip and the second conducting circuit.

The utility model provides a beneficial effect of LED filament lies in: compared with the prior art, the utility model discloses a LED filament has the characteristic that can take place plastic deformation under the exogenic action through its base plate to make the base plate can be crooked and folding according to the demand of filament molding design, it is single that it has not only solved the molding of conventional filament, the problem of market product assimilation, it is fixed to need not to use special stem and molybdenum filament simultaneously, the molding can be according to the customer, the cell-shell designs wantonly with application scene demand, the cost of labor significantly reduces, the rate of qualification of this scheme is high simultaneously, compare with FPC flexible filament production, can practice thrift the cost more than 30%. In addition, the first LED light source and the second LED light source are respectively arranged on the two sides of the substrate, so that the two sides of the LED filament can emit light, and if the thickness of the substrate is relatively thinner, the light emitting effect of the incandescent lamp can be realized.

The utility model also provides a bulb, including above-mentioned LED filament.

The utility model provides a bulb's beneficial effect lies in: compared with the prior art, the utility model discloses a bulb passes through the setting of above-mentioned LED filament to make this bulb low in production cost, the product percent of pass is high, and the operational reliability is big, and can also reach the effect of adjusting different colour temperatures.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for the embodiments or the prior art descriptions will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without inventive labor.

Fig. 1 is a schematic front view of an LED filament according to an embodiment of the present invention;

3 FIG. 32 3 is 3 a 3 schematic 3 cross 3- 3 sectional 3 view 3 A 3- 3 A 3 of 3 the 3 LED 3 filament 3 of 3 FIG. 31 3; 3

Fig. 3 is a schematic sectional view B-B in fig. 2.

Wherein, in the figures, the respective reference numerals:

100-a substrate; 200-a first LED light source; 300-a second LED light source; 400-a first insulating layer; 500-a second insulating layer; 700-a first photoresist layer; 800-a second photoresist layer; 210-a first conductive line; 220-a first LED chip; 310-a second conductive line; 320-a second LED chip; 610-input terminals; 620-output terminal.

Detailed Description

In order to make the technical problem, technical solution and advantageous effects to be solved by the present invention more clearly understood, the following description is given in conjunction with the accompanying drawings and embodiments to illustrate the present invention in further detail. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

It will be understood that when an element is referred to as being "secured to" or "disposed on" another element, it can be directly on the other element or be indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or be indirectly connected to the other element.

it will be understood that the terms "length," "width," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like are used in an orientation or positional relationship indicated in the drawings for convenience in describing the invention and to simplify the description, and are not intended to indicate or imply that the device or element so referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus should not be construed as limiting the invention.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless specifically limited otherwise.

The first embodiment is as follows:

Referring to fig. 1 and fig. 2 together, the LED filament provided by the present invention will now be described.

The LED filament includes a substrate 100, a first LED light source 200 and a second LED light source 300.

The substrate 100 may be plastically deformed by an external force, which is a physical phenomenon that an object is deformed by the external force and cannot be restored after the external force is removed or disappears. Therefore, when the substrate 100 has a property of being plastically deformed, the substrate 100 may be bent or folded, and the bent or folded state can be maintained. For example, metals, which are generally plastically deformable by an external force, are also related to the thickness of the substrate 100, and the thinner the substrate 100 is, the stronger the ability to plastically deform the substrate 100 is. Of course, in other embodiments of the present invention, the substrate 100 may be supported by other non-metallic materials with plastic deformation capability according to practical situations and specific requirements, and the present invention is not limited herein.

The first LED light source 200 is disposed on one surface of the substrate 100, and the second LED light source 300 is disposed on the other surface of the substrate 100. Specifically, in the present embodiment, the first LED light source 200 and the second LED light source 300 are respectively disposed on two opposite sides of the substrate 100, and both the first LED light source 200 and the second LED light source 300 can emit light.

The utility model provides a LED filament, compared with the prior art, the utility model discloses a LED filament has the characteristic that can take place plastic deformation under the exogenic action through its base plate 100 to make base plate 100 can be crooked and folding according to the demand of filament molding design, it is single that it has not only solved the molding of conventional LED filament, the problem of market product assimilation, it is fixed to need not to use special stem and molybdenum filament simultaneously, the molding can be according to the customer, the cell-shell and the arbitrary design of application scene demand, the cost of labor that significantly reduces, this scheme qualification rate is high simultaneously, compare with FPC flexible filament production, can practice thrift the cost more than 30%. In addition, the first LED light source 200 and the second LED light source 300 are respectively disposed on both sides of the substrate 100, so that both sides of the LED filament emit light, and if the thickness of the substrate 100 is made relatively thin, the light emitting effect of the incandescent lamp can be achieved.

Preferably, as an embodiment of the LED filament provided in the present invention, the substrate 100 is made of a metal material, the metal material has conductivity, in order to prevent the substrate 100 from interfering with the circuit of the first LED light source 200 and the second LED light source 300, the first insulating layer 400 is laid on one side of the substrate 100, and the second insulating layer 500 is laid on the other side of the substrate 100. Of course, in other embodiments of the present invention, according to practical situations and specific requirements, when the substrate 100 is made of other materials with plastic deformation and the materials do not have conductivity, the two sides of the substrate 100 may not be provided with insulating layers, and the present invention is not limited thereto.

in addition, the metal has a heat dissipation function, and when the thickness of the substrate 100 is properly increased, the heat dissipation effect of the substrate 100 can be equivalent to the filament scheme of a sapphire or ceramic substrate, which can meet the requirements of various application scenarios, and the application range is wide.

Further, as the utility model provides a specific implementation of LED filament, above-mentioned first LED light source 200 and second LED light source 300 independent control each other, promptly through with first LED light source 200 alone with external drive power supply or mains connection, also simultaneously with second LED light source 300 alone with external drive power supply or mains connection to can adjust the light colour temperature according to the light colour temperature demand, to the individual control of first LED light source 200 and second LED light source 300.

Further, as the utility model provides a specific implementation of LED filament is equipped with two sets of external terminals on the above-mentioned base plate 100, and two sets of external terminals are used for first LED light source 200 and external drive power supply or mains connection respectively, and second LED light source 300 and external drive power supply or mains connection. Specifically, in the embodiment, the two sets of external terminals are respectively disposed on two sides of the substrate 100 and respectively disposed corresponding to the first LED light source 200 and the second LED light source 300, each set of external terminals respectively includes an input terminal 610 and an output terminal 620, and the input terminal 610 and the output terminal 620 are respectively disposed on two opposite edges of the substrate 100, so as to facilitate external connection. Of course, in other embodiments of the present invention, the input terminal 610 and the output terminal 620 may be disposed at other positions of the substrate 100 according to the actual layout requirements of the first LED light source 200 and the second LED light source 300, which is not limited herein.

Further, referring to fig. 3, as an embodiment of the LED filament provided by the present invention, the first LED light source 200 includes a first conductive circuit 210 and at least a first LED chip 220. The first conductive traces 210 are disposed on the first insulating layer 400 by printing or pressing, the first LED chips 220 are disposed on the first conductive traces 210 and electrically connected to the first conductive traces 210, and when the first conductive traces 210 are provided with a plurality of first LED chips 220, the first LED chips 220 can be disposed in a connection manner such as being all connected in series, all connected in parallel, or partially connected in series and then connected in parallel according to the lighting requirement of the LED filament.

in this embodiment, a row of first LED chips 220 is disposed on the substrate 100, and the first LED chips 220 are arranged in parallel along one end of the substrate 100 toward the other end and at equal intervals, so that the emitted light is uniform and the control is convenient. It is understood that, in other embodiments of the present invention, a plurality of rows of first LED chips 220 may be disposed on the substrate 100, and the intervals between the first LED chips 220 may be unequal, or even the first LED chips 220 on the substrate 100 may be distributed along a curve, which is not limited herein.

similarly, in the present embodiment, the second LED light source 300 includes a second conductive trace 310 and at least one second LED chip 320. The second conductive traces 310 are disposed on the second insulating layer 500 by printing or pressing, the second LED chips 320 are disposed on the second conductive traces 310 and electrically connected to the second conductive traces 310, and when the second conductive traces 310 are provided with a plurality of second LED chips 320, the second LED chips 320 can be disposed in a connection manner of being all connected in series, all connected in parallel, or partially connected in series and then connected in parallel according to the lighting requirement of the LED filament.

In this embodiment, a row of second LED chips 320 is disposed on the substrate 100, and the second LED chips 320 are arranged in parallel along one end of the substrate 100 toward the other end and at equal intervals, so that the emitted light is uniform and the control is convenient. It is understood that, in other embodiments of the present invention, a plurality of rows of second LED chips 320 may be disposed on the substrate 100, and the intervals between the second LED chips 320 may be unequal, and even the second LED chips 320 on the substrate 100 may be distributed along a curve, which is not limited herein.

Further, please refer to fig. 3, as a specific implementation manner of the LED filament provided in the present invention, the first LED chip 220 is welded on the first conductive trace 210 through solder paste or silver paste, and the solder paste or silver paste has conductivity, and not only can fix the first LED chip 220 on the first conductive trace 210, but also can realize the wire connection between the first LED chip 220 and the first conductive trace 210. Similarly, the second LED chip 320 is also soldered on the second conductive traces 310 by solder paste or silver paste, which will not be described again.

Further, please refer to fig. 3, as a specific embodiment of the LED filament provided by the present invention, the first LED chip 220 and the first conductive trace 210 are coated with a first photoresist layer 700, and the first photoresist layer 700 is blended with phosphor powder, so as to adjust the light-emitting color temperature of the first LED light source 200 by adjusting the ratio of the phosphor powder in the first photoresist layer 700, thereby being applicable to the applications of adjusting light and color, and switching color temperature.

Similarly, the second LED chip 320 and the second conductive trace 310 are coated with the second optical adhesive layer 800, and fluorescent powder is mixed in the second optical adhesive layer 800, so that the color temperature of the output light of the second LED light source 300 can be adjusted by adjusting the ratio of the fluorescent powder in the second optical adhesive layer 800, and the LED light source can be used in applications such as dimming, color temperature switching, and the like.

The utility model also provides a bulb, including above-mentioned LED filament. The utility model discloses a bulb passes through the setting of above-mentioned LED filament to make this bulb low in production cost, the product percent of pass is high, and the operational reliability is big, and can also reach the effect of adjusting different colour temperatures.

Example two:

The technical characteristics of the LED filament in this embodiment are substantially the same as those of the LED filament in the first embodiment, and the differences are as follows: in this embodiment, the first LED light source 200 and the second LED light source 300 are connected in series, and the first LED light source 200 and the second LED light source 300 can be controlled simultaneously by the series connection, so that the control is convenient, and the external control circuit can be optimized

Specifically, in this embodiment, the first LED light source 200 and the second LED light source 300 are connected in series through an electrical connector, and the substrate 100 is provided with a set of external terminals for connecting the first LED light source 200 and the second LED light source 300 in series and then connecting them externally. When the circuit connection is performed, the first LED light source 200 and the second LED light source 300 may be connected in series through the electrical connector, and then connected to the external terminal. At this time, the external terminal may be disposed on one side or the other side of the substrate 100 according to the mounting requirement, and the external terminal includes an input terminal 610 and an output terminal 620, and the input terminal 610 and the output terminal 620 are respectively disposed on the edges of the two opposite ends of the substrate 100, so as to facilitate external connection. Of course, in other embodiments of the present invention, the input terminal 610 and the output terminal 620 may be disposed at other positions of the substrate 100 according to the actual layout requirements of the first LED light source 200 and the second LED light source 300, which is not limited herein.

Example three:

The technical characteristics of the LED filament in this embodiment are substantially the same as those of the LED filament in the first embodiment, and the differences are as follows: in this embodiment, the first LED light source 200 and the second LED light source 300 are connected in parallel, and the first LED light source 200 and the second LED light source 300 can be controlled simultaneously by the parallel arrangement, so that the control is convenient, and an external control circuit can be optimized. In addition, the first LED light source 200 and the second LED light source 300 have no influence on each other, and even if one of the circuits fails, the other circuit can still operate as usual.

Further, in the present embodiment, the substrate 100 is provided with a set of external terminals for connecting the first LED light source 200 and the second LED light source 300 in parallel and then externally connecting them. At this time, the external terminal may be disposed on one side or the other side of the substrate 100 according to the mounting requirement, and the external terminal includes an input terminal 610 and an output terminal 620, and the input terminal 610 and the output terminal 620 are respectively disposed on the edges of the two opposite ends of the substrate 100, so as to facilitate external connection. Of course, in other embodiments of the present invention, the input terminal 610 and the output terminal 620 may be disposed at other positions of the substrate 100 according to the actual layout requirements of the first LED light source 200 and the second LED light source 300, which is not limited herein.

The above description is only exemplary of the present invention and should not be taken as limiting the scope of the present invention, as any modifications, equivalents, improvements and the like made within the spirit and principles of the present invention are intended to be included within the scope of the present invention.

Claims

an LED filament, comprising:

A substrate that is plastically deformable under an external force to form a bend and/or fold;

The first LED light source is arranged on one surface of the substrate;

And the second LED light source is arranged on the other surface of the substrate.
2. The LED filament of claim 1, wherein the substrate is made of a metal material, and a first insulating layer is disposed on one surface of the substrate and a second insulating layer is disposed on the other surface of the substrate.
3. the LED filament of claim 1, wherein the first LED light source and the second LED light source are controlled independently of each other.
4. The LED filament according to claim 3, wherein two sets of external terminals are disposed on the substrate for connecting the first LED light source and the second LED light source respectively.
5. The LED filament of claim 1, wherein the first LED light source and the second LED light source are connected in series or in parallel with each other.
6. The LED filament according to claim 5, wherein a set of external terminals for connecting the first LED light source and the second LED light source in series or in parallel are disposed on the substrate.
7. the LED filament of claim 2, wherein the first LED light source comprises a first conductive trace printed or pressed on the first insulating layer, first LED chips disposed on the first conductive trace, and the first LED chips are connected in series and/or in parallel; the second LED light source comprises a second conductive circuit printed or pressed on the second insulating layer and second LED chips arranged on the second conductive circuit, and the second LED chips are mutually connected in series and/or in parallel.
8. The LED filament of claim 7, wherein the first LED chip is soldered on the first conductive trace with a solder paste or a silver paste; and the second LED chip is welded on the second conductive circuit through solder paste or silver paste.
9. the LED filament of claim 8, wherein a first glue layer formulated with phosphor is coated on the first LED chip and the first conductive trace; and a second photoresist layer prepared with fluorescent powder is coated on the second LED chip and the second conducting circuit.
10. A bulb comprising the LED filament of any one of claims 1 to 9.