CN107740940A - LED Filament Lamp - Google Patents

Abstract

an L ED filament lamp comprises a lamp holder and a light source strip, wherein the lamp holder is used for supplying power to the light source strip, the light source strip comprises a substrate, a plurality of L ED light sources and a first packaging layer, the plurality of L ED light sources and the first packaging layer are arranged on the substrate, the substrate is made of flexible materials, the L ED light sources are fixed on the substrate, the first packaging layer integrally covers the L ED light sources, the light source strip is bent to form a curve or a bent line structure, and the first packaging layer is used for refracting light rays emitted by the L ED light sources.

Description

LED Filament Lamp

technical field

The invention relates to the technical field of LED lighting, in particular to an LED filament lamp.

Background technique

In recent years, due to the rapid development of the LED industry, LED lamps have gradually replaced traditional lighting fixtures. Because LED light has the characteristics of point light source and directionality, in order to achieve large-angle lighting like incandescent lamps, there is an existing LED filament that encapsulates LED chips on a transparent substrate to form an LED filament, and then connects multiple filaments to form a similar The shape of the incandescent filament to achieve the effect similar to a large angle of light.

However, since the positions where these LED filaments are connected to each other cannot emit light, it is difficult to achieve uniform luminous illumination in the entire lighting space in the structure spliced by multiple LED filaments.

Contents of the invention

In view of this, it is necessary to provide an LED filament lamp capable of achieving uniform luminescence.

An LED filament lamp, comprising a lamp base and a light source bar, the lamp base is used to supply power to the light source bar, the light source bar includes a substrate, a plurality of LED light sources and a first packaging layer arranged on the substrate, the substrate is made of flexible material The LED light source is fixed on the substrate, the first encapsulation layer covers the LED light source integrally, the light source bar is bent to form a curved or broken line structure, and the first encapsulation layer is used to refract the light emitted by the LED light source. light.

Compared with the prior art, the light source bar of the present invention is bent into a curved or folded line structure, so that all the parts covered by the first encapsulation layer on the substrate can emit light continuously, thereby overcoming the inability of the interconnected parts of the LED filaments in the prior art. Therefore, the present invention has the advantage of being able to emit light at a large angle.

Description of drawings

Fig. 1 is a front view of the first embodiment of the LED filament lamp of the present invention.

Fig. 2 is a perspective view of the LED filament lamp shown in Fig. 1 .

Fig. 3 is a partial cross-sectional view of the light source bar in the LED filament lamp shown in Fig. 1 .

detailed description

The present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

Please refer to FIG. 1 and FIG. 2 , the LED filament lamp 100 includes a lamp base body 10 , a stem 20 , a light source bar 30 and a bulb shell 40 , and the lamp base 10 is used to supply power to the light source bar 30 . The bulb shell 40 is a shell structure with an open bottom. The stem 20 is sintered on the bottom of the bulb shell 40 and forms a closed space with the bulb shell 40 for accommodating the light source bar 30 . An exhaust pipe (not shown) is provided on the stem 20, and the exhaust pipe is used to extract the air in the enclosed space and fill it with heat-dissipating gas (such as helium, oxygen, nitrogen or their mixture). After being filled with heat-dissipating gas, the end of the exhaust pipe will be sintered and sealed, thereby preventing gas leakage in the confined space. The exhaust pipe, stem 20 and bulb shell 40 are all made of glass material.

Referring to FIG. 1 and FIG. 3 , the light source bar 30 includes a substrate 32 , a plurality of LED light sources 34 and a first packaging layer 35 disposed on the substrate 32 . The base plate 32 is made of flexible material, and the base plate 32 is bent to form a curved or folded line structure. These LED light sources 34 are fixed on the substrate 32 and electrically connected with the substrate 32 . The first encapsulation layer 35 integrally covers the LED light sources 34 . The first encapsulation layer 35 is used to refract the light emitted by the LED light source 34, so that the light is emitted from all surfaces of the encapsulation layer 35, so that the light source board 30 can emit light continuously as a strip structure. The substrate 32 includes a metal layer 321 and a circuit layer 322 disposed on the metal layer 321 . These LED light sources 34 are flip-chip LED light sources, and the circuit layer 322 is electrically connected to all the LED light sources 34 . The light source bar 30 also includes two conductive sheets 31 disposed at two ends of the substrate 32 . One ends of the conductive sheets 31 protrude into the first encapsulation layer 35 and are electrically connected to the circuit layer 322 by soldering. The other ends of the conductive sheets 31 protrude from the first encapsulation layer 35 . As a preferred embodiment, the substrate 32 may also include an insulating layer (not shown), the insulating layer is disposed between the metal layer 321 and the circuit layer 322 so that the metal layer 321 and the circuit layer 322 insulation. This insulating layer is made of flexible material. The first encapsulation layer 35 is made of flexible material, and the first phosphor powder (not shown in the figure) is arranged in the first encapsulation layer 35, and the first phosphor powder is excited by the light emitted by these LED light sources 34 to emit another wavelength. of light. These LED light sources 34 and the first encapsulation layer 35 are all arranged on the front side of the substrate 32, and the back side of the substrate 32 is provided with a second encapsulation layer 36 (as shown in FIG. 3 ), and the second encapsulation layer 36 is provided with a first Two phosphors (not shown in the figure), the second phosphor in the second encapsulation layer 36 is excited by the light emitted from the first encapsulation layer 35 to emit light of a third wavelength.

The light of the third wavelength makes the back of the light source bar 30 look bright from the outside, so for the user of the LED filament lamp 100, both the front and the back of the light source bar 30 are illuminated, and the whole The light source bars 30 are all transparent. Compared with the technical solutions in the prior art that require LED light sources and encapsulation layers to be provided on both the front and back sides of the light source bar 30 , the present invention only needs to install LED light sources on the front side of the light source bar 30 , which greatly simplifies the structure.

Please refer to FIG. 1 and FIG. 2 , the light source bar 30 is bent to form a curved structure so that a part of the front of the substrate 32 is disposed corresponding to a part of the back of the substrate 32 . This makes the light emitted from the first encapsulation layer 35 directly irradiate part of the second encapsulation layer 36, compared with the light reflected from the inner wall of the bulb shell 40, the second encapsulation layer 36 The intensity of light directly irradiated from the first encapsulation layer 35 is stronger, and the light emitted by the excited phosphor in the second encapsulation layer 36 can be brighter.

Please refer to Fig. 1 and Fig. 2, also include two wires 22 and 23, one end of these two wires 22 and 23 is electrically connected with the driver (not shown) in the lamp cap 10 or the lamp cap 10, the other end of the wire The conductive strips 31 passing through the stem 20 and the two ends of the light source bar 30 are electrically connected by welding. The top of the stem 20 extends toward the inner wall of the bulb shell 40 to form a bracket 21 , a fixing wire 24 is fixed on the top of the bracket 21 , and the fixing wire 24 is electrically connected to the wire 22 . One end of the fixing wire 24 is electrically connected to the conductive sheet 31 of the light source bar 30 , and the other end of the fixing wire 24 is buckled and connected to the light source bar 30 to fix the light source bar 30 on the stem 20 .

During operation, the heat generated by the light source bar 30 can be transferred to the bulb housing 40 by the heat dissipation gas in the enclosed space and dissipated. The light source bar 30 is bent into a spiral shape and can emit light from both sides, so that the LED filament lamp 100 can realize large-angle light emission similar to an incandescent lamp.

It should be pointed out that since the substrate 32 , insulating layer, first encapsulation layer 35 , and second encapsulation layer 36 are all made of flexible materials, the light source bar 30 can be bent into a desired curved or folded line structure. More importantly, since the LED light sources 34 are welded on the circuit layer 322 in a flip-chip manner, the bending of the light source bar 30 will not affect the welding between the LED light sources 34 and the circuit layer 322 . However, in the prior art, the LED light sources are fixed on the substrate by means of formal installation, and the LED light sources are electrically connected by gold wires. If the substrate is bent, the gold wires connecting the LED light sources will easily fall off. This is the key obstacle that makes it difficult to make a flexible light source strip from formal LED light sources. The light source bar 30 is bent into a curved or folded line structure, so that all the parts covered by the first encapsulation layer on the substrate 32 can emit light continuously, thereby overcoming the defect that the interconnected parts of the LED filaments cannot emit light in the prior art, thus making the present invention The invention has the advantage of being able to emit light at a large angle.

The above description is only a preferred embodiment of the present invention, and is not intended to limit the present invention. Anyone skilled in the art who uses the technical content disclosed above to make some changes is equivalent to equivalent changes without departing from the technical scope of the solution. Example. However, any modifications, equivalent replacements, improvements, etc. made to the above embodiments according to the technical essence of the present invention shall be included within the scope of protection of the present invention.

Claims (10)

1. a kind of LED filament lamp, including lamp holder and light source strip, the lamp holder is used to power to the light source strip, it is characterised in that：The light Source bar includes the plurality of LEDs light source and the first encapsulated layer of substrate and setting on the substrate, and the substrate is fabricated from a flexible material, institute State LED light source to fix on the substrate, first encapsulated layer integrally covers the LED light source, and the light source strip is bent to form song Line or meander line structure, first encapsulated layer are used to reflect the light that the LED light source is sent.

2. LED filament lamp according to claim 1, it is characterised in that：The substrate includes metal level and is arranged on the metal Line layer on layer, the LED light source are flip LED light source, and the line layer electrically connects with the LED light source.

3. LED filament lamp according to claim 2, it is characterised in that：Also include insulating barrier, the insulating barrier is arranged on the gold Belong to and the metal level and the line layer insulating between layer and the line layer, the insulating barrier is fabricated from a flexible material.

4. LED filament lamp according to claim 1, it is characterised in that：First encapsulated layer is fabricated from a flexible material, and this The first fluorescent material is provided with one encapsulated layer, the light that first fluorescent material is sent by the LED light source, which excites, sends another kind The light of wavelength.

5. LED filament lamp according to claim 4, it is characterised in that：The LED light source and first encapsulated layer are respectively provided with In the front of the substrate, the back side of the substrate is provided with the second encapsulated layer, is provided with the second fluorescent material in second encapsulated layer, this second Fluorescent material is emitted beam by the exciting for light sent from first encapsulated layer.

6. LED filament lamp according to claim 5, it is characterised in that：The substrate is bent to form curvilinear structures and causes the base The partial front of plate to should substrate partial rear set.

7. LED filament lamp according to claim 1, it is characterised in that：Also include bulb housing, at least two wires and core Post, the bulb housing are the shell structure of bottom opening, and the stem is sintered in the bottom of the bulb housing and forms one with the bulb housing The individual confined space for housing the light source strip, one end of the wire electrically connect with the lamp holder, and the other end of the wire passes through should Stem electrically connects with the light source strip.

8. LED filament lamp according to claim 7, it is characterised in that：The stem is provided with a blast pipe, for extracting out Air in the confined space is simultaneously filled with radiating gas, and the blast pipe, stem and bulb housing are made by glass material.

9. LED filament lamp according to claim 7, it is characterised in that：Prolong towards the inwall of bulb housing at the top of the stem Stretch to form support, fixed silk is fixed with the top of the support, the fixation silk electrically connects with a wire, one end of the fixation silk Electrically connected with the light source strip, the other end of the fixation silk is connected with the light source strip so that the light source strip is fixed on the stem 20.

10. LED filament lamp according to claim 6, it is characterised in that：The light source strip is bent into helical structure.