CN207438198U - LED Filament Lamp - Google Patents

Abstract

An LED filament lamp comprises a lamp holder body, a heat transfer platform and a light source bar, the light source bar comprises a substrate and a plurality of LED light sources arranged at intervals on the substrate, the heat transfer platform is arranged on the top of the lamp holder body and is thermally connected to the lamp holder body, the substrate is made of a heat conductive material, at least one pair of connecting parts are arranged on the heat transfer platform at intervals and are thermally connected to the heat transfer platform, the light source bar is bent to form a curve or a broken line structure, the two ends of the light source bar are respectively fixed on the connecting parts and are thermally connected to the connecting parts, the light source bar is provided with a conductive end electrically connected to the outside world, and the LED light sources are electrically connected to the conductive end after being electrically connected to each other. The LED filament lamp of the utility model has the advantages of a large light emitting angle and good heat dissipation effect.

Description

LED Filament Lamp

technical field

The utility model relates to the lighting field, in particular to an LED filament lamp.

Background technique

At present, with the maturity of LED chip manufacturing and packaging technology, the cost of LED components has been greatly reduced, and LEDs have been used more and more widely. In the field of LED lighting, the advantages of energy saving and long life of LED have been fully reflected, and more and more LED lights have emerged on the market. In particular, since the appearance of LED filament lamps is very similar to traditional incandescent lamps, more and more LED filament lamps are favored by consumers in the market.

However, due to the strong directionality of the light emitted by the LED chip, the existing LED filament lamps on the market often have the problem of a small luminous angle, which cannot achieve the light output effect of traditional lamps such as incandescent lamps. Use is restricted. In addition, the existing LED filament lamps often need to fill the bulb shell with heat dissipation gas during the production process to solve the heat dissipation problem of the LED filament strip, but this makes the production process complicated and unreliable. The cost is a big problem. Therefore, how to design a LED filament lamp with a large luminous angle without filling the bulb shell with heat-dissipating gas has become a current technical problem urgently to be solved.

Utility model content

In view of this, it is necessary to provide an LED filament lamp, which has a large luminous angle and does not need to be filled with cooling gas.

An LED filament lamp, comprising a lamp body, a heat transfer platform and a light source bar. The light source bar includes a substrate and a plurality of LED light sources arranged on the substrate at intervals. The heat transfer platform is arranged on the top of the lamp body and connected to the The lamp head body is thermally connected, the base plate is made of heat-conducting material, and at least one pair of connection parts are arranged on the heat transfer platform, and the connection parts are arranged at intervals on the heat transfer platform and are thermally connected with the heat transfer platform. The light source bar is bent to form a curved or broken line structure. The two ends of the light source bar are respectively fixed on the connecting part and thermally connected with the connecting part. The light source bar is provided with a conductive end electrically connected to the outside. The LED light sources are electrically connected to each other and then electrically connected to the conductive end.

Further, the light source bar is bent in a direction away from the heat transfer platform to form an arched structure, and the LED light source is arranged on an outer surface of the light source bar that is facing away from the heat transfer platform.

Further, it also includes a light bulb housing, the number of the light source bars is at least two, the bulb cover is arranged on the heat transfer platform and accommodates the light source bars inside, and the light source bars are intersected with each other.

Further, the LED light source on the light source bar is integrally covered by an encapsulation layer to form a surface emitting light source.

Further, the lamp cap body is provided with a heat dissipation part, the heat transfer platform is thermally connected with the heat dissipation part, and the heat dissipation part is made of insulating material.

Further, the substrate is made of flexible metal material.

Further, the substrate includes a metal layer and a circuit layer disposed on the metal layer, the LED light source is a flip-chip LED light source, and the circuit layer is electrically connected to the LED light source and the conductive terminal.

Further, the number of the conductive terminals is two, which are respectively arranged at two ends of the light source bar.

Further, the encapsulation layer is made of flexible material, and phosphor powder is arranged in the encapsulation layer, and the phosphor powder is excited by the light emitted by the LED light source to emit light of another wavelength.

Further, the light source bar is provided with two groups of LED light source groups respectively connected in series, and the LED light source groups emit light of different colors or color temperatures.

Further, the LED light source groups are respectively electrically connected to an external power supply, and a controller is provided in the external power supply, and the controller controls the intensity of the current or voltage supplied to the LED light source groups respectively.

Further, it also includes a connection plate, which is sleeved on the periphery of the heat transfer platform, and the connection plate is provided with a relief hole corresponding to the heat transfer platform, and the conductive end corresponding to each light source bar on the connection plate is also An electrode terminal is provided, one end of the electrode terminal is electrically connected to the connecting plate, and the other end of the electrode terminal is provided with an elastic contact piece, and the elastic contact piece of the electrode terminal is elastically connected to the conductive end on the light source bar respectively. ground for electrical connection.

Compared with the prior art, the LED filament lamp bends the light source bar to form a curved or folded line structure, and thermally connects and fixes both ends of the light source bar to the connecting part, so that the LED filament has a luminous effect. The advantage of large angle; and, the two ends of the light source bar are thermally connected and fixed on the connecting part, so that the heat generated when the LED filament lamp is working can be conducted to the lamp body through the connecting part in time, and the heat from the lamp body to the outside In this way, the LED filament lamp does not need to be filled with heat dissipation gas in the bulb shell, and the heat dissipation effect is good, so that the manufacturing process of the LED filament lamp product is simpler.

Description of drawings

Fig. 1 is an exploded view of the LED filament lamp of the first embodiment.

Fig. 2 is an assembly diagram of the LED filament lamp shown in Fig. 1 .

Fig. 3 is a schematic cross-sectional view along line A-A of Fig. 2 .

Fig. 4 is a schematic diagram of a light source bar.

Explanation of reference signs:

10 Lamp holder 33 Packaging layer

12 Driver board 40 Bulb housing

20 Lamp body 50 Connecting plate

21 heat transfer table 51 relief hole

22 Heat sink 52 Electrode terminal

211 Connecting part 53 Elastic contact piece

30 light bar 60 cover

31 Substrate 61 Through hole

32 Conductive terminal 62 Flange

Detailed ways

Below in conjunction with accompanying drawing and specific embodiment the utility model is described in further detail.

Please refer to FIG. 1 to FIG. 4 , the LED filament lamp includes a lamp base 10 , a driving board 12 , a lamp base body 20 , a connecting plate 50 , a cover 60 , a light source bar 30 and a bulb housing 40 . The top of the lamp cap 10 is connected to the bottom of the lamp cap body 20 , and the driving board 12 is placed in the receiving space formed after the lamp cap 10 and the lamp cap body 20 are connected. The heat transfer platform 21 is arranged on the top of the lamp body 20 and thermally connected with the lamp body 20 . The connecting plate 50 is sheathed on the periphery of the heat transfer platform 21 , and the cover 60 is covered on the heat transfer platform 21 and locked inside the lamp head body 20 . The light source bar 30 is bent to form a curved or broken line structure, and its two ends are thermally connected to the heat transfer platform 21, and the bottom of the bulb shell 40 is connected to the top of the lamp body 20, and the bulb shell 40 is covered on the heat transfer platform 21 and accommodate the light source bar 30 inside.

The light source bar 30 includes a base plate 31 and a plurality of LED light sources (not shown) spaced on the base plate 31. The base plate 31 is made of heat-conducting material. Preferably, the base plate 31 is made of flexible metal material. The LED light sources on the light source bar 30 are integrally covered by an encapsulation layer 33 to form a surface emitting light source. In this embodiment, the number of the light source bars 30 is at least two, the light source bars 30 are bent away from the heat transfer platform 21 to form an arched structure, and the LED light sources are arranged on the back of the light source bars 30 Towards the outer surface of the heat transfer platform 21 , the light source bars 30 are arranged to cross each other. In this way, the light source bar 30 can emit light in various directions, so that the LED filament lamp has the advantage of a large light emitting angle.

The heat transfer platform 21 is provided with at least one pair of connection parts 211, and the connection parts 211 are separately arranged on the heat transfer platform 21 and thermally connected with the heat transfer platform 21, and the two ends of the light source bar 30 are respectively fixed. on the connecting portion 211 and thermally connected with the connecting portion 211 . In this embodiment, two pairs, that is, four connecting portions 211 are provided on the heat transfer platform 21 . The lamp body 20 is provided with a heat dissipation part 22, the heat transfer platform 21 is thermally connected with the heat dissipation part 22, and the heat dissipation part 22 is made of insulating material. When the LED filament lamp is working, since the heat transfer platform 21 is thermally connected to the lamp body 20, the heat generated by the light source bar 30 can be conducted to the heat transfer platform 21 through the connection part 211, and then conducted to the lamp body 20 by the heat transfer platform 21. , the heat is dissipated from the lamp head body 20 to the outside. In this way, the heat dissipation problem of the light source bar 30 can be well solved, and it is no longer necessary to fill the bulb housing 40 with cooling gas to assist the light source bar 30 to dissipate heat, making the production process of LED filament lamp products simpler.

Please refer to FIG. 1 and FIG. 4 , the light source bar 30 is provided with a conductive terminal 32 electrically connected to the outside world, and the LED light sources are electrically connected to each other and then electrically connected to the conductive terminal 32 . In this embodiment, the number of the conductive terminals 32 is two, which are respectively arranged at two ends of the light source bar 30 . The substrate 31 on the light source bar 30 includes a metal layer (not shown in the figure) and a circuit layer (not shown in the figure) arranged on the metal layer. The LED light source is a flip-chip LED light source. The LED light source is electrically connected to the conductive end 32 . The encapsulation layer 33 on the light source bar 30 is made of flexible material, so that the performance of the light source bar 30 will not be affected when the light source bar 30 is bent. Phosphor powder is arranged in the encapsulation layer 33 , and the phosphor powder is excited by the light emitted by the LED light source to emit light of another wavelength. Understandably, two groups of LED light source groups connected in series may also be provided on the light source bar 30 , and the LED light source groups emit light of different colors or color temperatures to meet more needs of consumers. The LED light source groups are respectively electrically connected to an external power source (not shown in the figure), and a controller is provided in the external power source, and the controller respectively controls the intensity of the current or voltage supplied to the LED light source groups.

When assembling the LED filament lamp, the connection plate 50 is sheathed on the periphery of the heat transfer platform 21 and accommodated in the lamp head body 20 . The connection plate 50 is provided with a relief hole 51 corresponding to the heat transfer platform 21 , so that the connection plate 50 can pass through the heat transfer platform 21 through the relief hole 51 and be sleeved on its periphery. The connecting plate 50 is also provided with an electrode terminal 52 corresponding to the conductive end 32 of each light source bar 30, one end of the electrode terminal 52 is electrically connected to the connecting plate 50, and the other end of the electrode terminal 52 is provided with an elastic contact piece. 53 , the elastic contact pieces 53 of the electrode terminals 52 elastically abut against the conductive ends 32 on the light source bar 30 to realize electrical connection. One end of the driving board 12 is electrically connected to the lamp holder 10 , and the other end is electrically connected to the connection board 50 , so that the external power supply can provide proper electric energy to supply the light source bar 30 . By arranging the electrode terminals 52 on the connecting board 50, the electrical connection between the light source bar 30 and the driving board 12 saves the traditional welding wire connection method, making the operation of the LED filament lamp easier in the production process.

The cover 60 is generally an inverted bowl-shaped shell as a whole, and the cover 60 is made of insulating material. The cover 60 is also provided with a through hole 61 corresponding to the position of the connecting portion 211. In this embodiment, four through holes 61 are provided, so that the ends of the two light source bars 30 can respectively pass through the corresponding through holes 61 and connect with the described connection. Part 211 is connected. The bottom of the cover 60 is also provided with an outward flange 62, and the inside of the lamp body 20 is provided with a slot (not shown in the figure) corresponding to the position of the flange 62. The cover 60 covers the heat transfer platform 21 and passes through the The flange 62 is clamped on the slot inside the lamp head body 20 . The surface of the cover 60 has a certain reflective effect, which can improve the light efficiency of the LED filament lamp.

The above description is only a preferred embodiment of the utility model, and is not intended to limit the utility model. All modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the utility model shall be included in this utility model. within the scope of utility model protection.

Claims (12)

1. An LED filament lamp, comprising a lamp body, a heat transfer platform and a light source bar, the light source bar comprising a substrate and a plurality of LED light sources arranged at intervals on the substrate, the heat transfer platform is arranged on the top of the lamp body and It is thermally connected with the lamp head body, and it is characterized in that: the substrate is made of heat-conducting material, and at least one pair of connection parts are provided on the heat transfer platform, and the connection parts are respectively arranged at intervals on the heat transfer platform and connected to the heat transfer platform. The light source bar is bent to form a curved or broken line structure, and the two ends of the light source bar are respectively fixed on the connecting part and thermally connected with the connecting part. The connected conductive end, the LED light sources are electrically connected to each other and then electrically connected to the conductive end. 2. The LED filament lamp according to claim 1, characterized in that: the light source bar is bent away from the heat transfer table to form an arched structure, and the LED light source is arranged on the light source bar facing away from the heat transfer table The outer surface of the table setting. 3. The LED filament lamp according to claim 2, characterized in that: it also includes a bulb shell, the number of the light source strips is at least two, the bulb shell cover is arranged on the heat transfer table and the light source strips Accommodated inside, the light source bars are arranged to cross each other. 4. The LED filament lamp according to claim 1, characterized in that: the LED light source on the light source bar is integrally covered by an encapsulation layer to form a surface emitting light source. 5 . The LED filament lamp according to claim 4 , wherein a heat dissipation part is provided on the lamp base, the heat transfer platform is thermally connected with the heat dissipation part, and the heat dissipation part is made of insulating material. 6. The LED filament lamp according to claim 1, wherein the substrate is made of flexible metal material. 7. The LED filament lamp according to claim 1, characterized in that: the substrate includes a metal layer and a circuit layer arranged on the metal layer, the LED light source is a flip-chip LED light source, and the circuit layer and the LED The light source is electrically connected to the conductive end. 8. The LED filament lamp according to claim 1, characterized in that: the number of the conductive ends is two, which are respectively arranged at two ends of the light source bar. 9. The LED filament lamp according to claim 4, characterized in that: the encapsulation layer is made of flexible material, and phosphor powder is arranged in the encapsulation layer, and the phosphor powder is excited by the light emitted by the LED light source to emit another light. wavelengths of light. 10. The LED filament lamp according to claim 1, wherein two groups of LED light source groups respectively connected in series are arranged on the light source bar, and the LED light source groups emit light of different colors or color temperatures. 11. The LED filament lamp according to claim 10, characterized in that: the LED light source groups are respectively electrically connected to an external power supply, and a controller is provided in the external power supply, and the controller respectively controls the current supplied to the LED light source groups or the strength of the voltage. 12. The LED filament lamp according to claim 1, further comprising a connecting plate, the connecting plate is sheathed on the periphery of the heat transfer platform, and the connecting plate is provided with a relief hole corresponding to the heat transfer platform , the conductive end corresponding to each light source bar on the connection board is also provided with an electrode terminal, one end of the electrode terminal is electrically connected to the connection board, the other end of the electrode terminal is provided with an elastic contact piece, and the electrode terminal is electrically connected to the connection board. The elastic contacts elastically abut against the conductive ends on the light source strips respectively to realize electrical connection.