WO2017124784A1

WO2017124784A1 - Wide-angle light emitting led filament lamp

Info

Publication number: WO2017124784A1
Application number: PCT/CN2016/102248
Authority: WO
Inventors: 曾茂进; 王其远; 鲍永均; 黄温昌; 曹亮亮; 陈小波; 吴明浩
Original assignee: 漳洲立达信光电子科技有限公司
Priority date: 2016-01-18
Filing date: 2016-10-17
Publication date: 2017-07-27
Also published as: CN105805579A

Abstract

A wide-angle light emitting LED filament lamp comprises a lamp holder (10), a heat transfer plate (20) and a plurality of light source plates (30), each of the light source plates (30) comprising a substrate (31) and a plurality of LED light sources arranged at intervals on the substrate (31), the heat transfer plate (20) being disposed at a top portion of the lamp holder (10) and provided with a plurality of connecting portions (21) thereon, the connecting portions (21) being arranged at intervals on the heat transfer plate (20) respectively and thermally connected thereto, bottom portions of the light source plates (30) being fixed on the connecting portions (21) respectively and thermally connected thereto, each of the substrates (31) of the light source plates (30) being made of heat sink material, the LED light sources being disposed on side surfaces of the substrates (31) and having a denser distribution at positions of the substrates (31) closer to the bottoms. The wide-angle light emitting LED filament lamp is advantageous in easy assembly process and good heat dissipation performance.

Description

Large angle LED light filament lamp

The invention relates to the technical field of LED illumination, in particular to a large-angle illumination LED filament lamp.

In recent years, due to the rapid development of the LED industry, LED Luminaires gradually replace traditional lighting fixtures. Because LED lighting has the characteristics of point light source and directionality, it is difficult for LED lamps to completely replace traditional incandescent lamps and achieve full light distribution. In the existing LED filament, a group of LED chips are packaged on a transparent substrate to form an LED filament, which can realize large-angle illumination, and then connect a plurality of filaments to form a luminous effect similar to a tungsten filament lamp. At present, the LED filament has substantially no heat sink, and the LED filament cannot be thermally conducted, so it is difficult to conduct the heat generated by the LED chip. The heat can only be thermally and thermally dissipated by the convection of the radiation and the internal gas, which easily causes the heat to accumulate. The life of the LED filament is shortened.

The existing LED filament lamp is usually manufactured by a heat-conducting gas and a glass sealing process. This technology has high technical requirements for sealing, and the equipment is expensive, which easily leads to the problem that the sealing is not sealed, gas leakage, explosion, glass bubble is fragile, etc. . Long-term use is difficult to avoid air leakage problems, and air leakage will result in reduced heat dissipation or even LED filaments being burnt. Moreover, the heat dissipation performance of the gas is limited, and can only meet the development of the low-power LED filament lamp. Once the power is high, the heat generated by the LED filament cannot be dissipated in time, which easily causes thermal damage and light decay of the LED chip, so that the light of the whole lamp is made. The maintenance rate is low and the life is short.

In view of this, it is necessary to provide a large-angle light-emitting LED filament lamp with a simple assembly process and good heat dissipation.

A large-angle LED light filament lamp comprising a lamp body, a heat transfer plate and a plurality of light source plates, each light source plate comprising a substrate and a plurality of LED light sources spaced apart on the substrate, the heat transfer plate being disposed at the lamp head a top portion of the body, the heat transfer plate is provided with a plurality of connecting portions, the connecting portions are respectively disposed on the heat transfer plate and thermally connected to the heat transfer plate, and the bottom of the light source plate is respectively fixed to the connection And electrically connected to the connecting portion, the substrate of each light source plate is made of a heat dissipating material, and the LED light source is disposed on a side of the substrate and is densely distributed near a bottom of the substrate.

Compared with the prior art, the present invention places the LED light source on the substrate such that it is densely distributed near the bottom of the substrate, and the bottoms of the light source plates are respectively fixed to the connection thermally connected to the heat transfer plate. In this way, the heat generated by the LED light sources can form a gradient distribution on the substrate, and the heat generated at a position closer to the bottom of the substrate is more, and the heat conduction path of the portion of the heat to the heat transfer plate is shorter. Rapidly conducting to the connecting portion and conducting out through the heat transfer plate, increasing the speed of heat conduction and avoiding heat accumulation, so that the large-angle LED filament lamp has good heat dissipation effect, and does not need to separately charge heat-conducting gas and glass sealing. The process avoids the complicated process specially designed for charging heat-conducting gas and glass sealing, and has the advantages of simple assembly process and good heat dissipation.

figure 1

It is a perspective view of the first embodiment of the high angle illumination LED filament lamp of the present invention.

figure 2

It is an exploded view of the large-angle LED light filament lamp shown in Figure 1.

image 3

Is a sectional view of the large angle LED light filament lamp shown in Figure 1.

Figure 4

Is a perspective view of the electrode terminal in the large angle LED light filament lamp shown in Fig. 2.

Figure 5

Is a partially assembled perspective view of the large angle LED light filament lamp shown in Figure 2.

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

Referring to FIG. 1 to FIG. 5 , the large-angle LED light filament lamp includes a lamp body 10 , a heat transfer plate 20 , and a plurality of light source plates 30 . Each of the light source plates 30 includes a substrate 31 and is disposed on the substrate 31 . A plurality of LED light sources (not shown) are disposed on the top of the base body 10. The base body 10 is provided with a heat dissipating portion 11 that is thermally connected to the heat dissipating portion 11.

The light source plates 30 are respectively disposed obliquely with respect to the heat transfer plate 20, and the light source plates 30 are arranged in a ring shape around the central axis of the heat transfer plate 20. The heat transfer plate 20 is provided with four connecting portions 21 which are respectively disposed on the heat transfer plate 20 and are thermally connected to the heat transfer plate 20. Each of the connecting portions 21 is a block structure integrally provided on the light source panel 30. The bottoms of the light source plates 30 are respectively fixed to the connecting portions 21 and thermally connected to the connecting portions 21, so that the heat of the light source plates 30 can be conducted to the heat transfer plates 20. In this embodiment, the tops of the light source plates 30 are disposed closer to the central axis of the heat transfer plate 20 than the bottom thereof. The connecting portions 21 are respectively provided with inclined heat transfer surfaces 211 corresponding to the light source plates 30 to increase the light source plates. 30 is the thermal connection area with these connecting portions 21. In this embodiment, the number of the connecting portions 21 may be plural, and the connecting portions 21 may be provided integrally.

In this embodiment, the substrates 31 are made of a transparent or translucent material, and a part of the light emitted by the LED light sources is emitted outward through the substrate 31. The LED light source is disposed on the front surface of the substrate 31. The back surface of the substrate 31 is further provided with a heat conducting layer (not shown). A portion of the heat conducting layer is thermally connected to the connecting portion 21, and the position of the heat conducting layer is deviated from the LED light source. position. Specifically, the substrates 31 are made of ceramic, high thermal conductivity glass or sapphire material, and the heat conductive layer is a metallic silver layer or a metallic copper layer attached to the back surface of the substrate 31. The LED light sources on each of the light source panels 30 are packaged together by a phosphor layer to form a surface light source. The substrate 31 of each light source panel 30 is made of a heat dissipating material. The LED light sources are disposed on the side of the substrate 31 and are densely distributed near the bottom of the substrate 31. Thus, the heat generated by the LED light sources can be A gradient distribution is formed on the substrate 31. The heat generated at a position closer to the bottom of the substrate 31 is more, and the heat conduction path of the portion of the heat to the heat transfer plate 20 is shorter, and can be quickly transmitted to the connecting portion 21, The speed of heat conduction is increased and conducted through the heat transfer plate 20 to the heat dissipating portion 11 thermally connected to the heat transfer plate 20, and is radiated through the heat dissipating portion 11 to prevent heat accumulation, resulting in failure of these LED light sources.

In addition, please refer to FIG. 2, FIG. 4 and FIG. 5, further including a circuit board 50 disposed above the heat transfer plate 20, and the circuit board 50 is provided with a positioning hole 51 corresponding to the connecting portions 21, The circuit board 50 can be sleeved on the connecting portions 21. Each of the light source plates 30 is further provided with an electrode terminal 52. One end of the electrode terminals 52 is electrically connected to the circuit board 50. The other ends of the electrode terminals 52 are provided with elastic contacts 521, and each light source plate The bottoms of the substrates 31 in the 30 are respectively provided with electrodes (not shown), and the elastic contacts 521 of the electrode terminals 52 are elastically abutted with the electrodes on the light source plates 30 to achieve electrical connection, so that no additional bonding wires are needed. Easy to automate production.

In addition, a light bulb case 40 is further disposed. The bottom of the light bulb case 40 is disposed on the heat transfer plate 20 and the light source plate 30 is received therein. The light bulb case 40 is a hemispherical bulb structure, and the light source plate 30 is adjacent to the light source plate 30. The LED light source at the bottom of the substrate 31 is disposed corresponding to the bottom of the bulb shell 40, and the bottom of the bulb shell 40 is used to direct most of the light emitted from the LED light source on the light source panel 30 near the bottom of the substrate 31 toward the heat transfer plate 20. Directional refraction. The bulb shell 40 is of a transparent or translucent structure made of plastic or glass, and a light diffusing material may be disposed on the bulb shell 40.

In summary, when the LED light source is disposed on the substrate 31, the position of the LED light source is relatively dense and large near the bottom of the substrate 31, and the distribution is relatively sparse and relatively thin at a position away from the bottom of the substrate. The bottoms of the light source plates 30 are respectively fixed on the connecting portions 21 thermally connected to the heat transfer plates 20, so that the heat generated by the LED light sources can form a gradient distribution on the substrate 31, closer to the bottom of the substrate 31. The position generates more heat, and the heat transfer path of the part of the heat to the heat transfer plate 20 is shorter, can be quickly transmitted to the connecting portion 21, and is conducted through the heat transfer plate 20 to increase the speed of heat conduction. Avoiding heat accumulation, the high-angle LED filament lamp has good heat dissipation effect, and does not need to separately charge heat-conducting gas and glass sealing process, avoiding complicated process specially designed for charging heat-conducting gas and glass sealing, and has simple assembly process The advantages of good heat dissipation.

The above is only the preferred embodiment of the present invention, and is not intended to limit the present invention. Any person skilled in the art can make some modifications to the equivalent of the above-mentioned technical contents without departing from the technical scope of the present invention. Example. Any modifications, equivalent substitutions, improvements, etc. to the above embodiments in accordance with the technical scope of the present invention are intended to be included within the scope of the present invention.

10 lamp body 11 heat sink

20 heat transfer plate 21 connection

211 heat transfer surface 30 light source board

31 substrate 40 bulb housing

50 circuit board 51 position hole

52 electrode terminal 521 elastic contact

Claims

A large-angle LED light filament lamp comprising a lamp body, a heat transfer plate and a plurality of light source plates, each light source plate comprising a substrate and a plurality of LED light sources spaced apart on the substrate, the heat transfer plate being disposed at the lamp head The top of the body is characterized in that: the heat transfer plate is provided with a plurality of connecting portions, the connecting portions are respectively disposed on the heat transfer plate and thermally connected to the heat transfer plate, and the bottom of the light source plate is respectively fixed On the connecting portion and thermally connected to the connecting portion, the substrate of each light source plate is made of a heat dissipating material, and the LED light source is disposed on a side of the substrate and distributed near a bottom of the substrate. dense.
The large-angle light-emitting LED filament lamp according to claim 1, wherein the light source plates are respectively disposed obliquely with respect to the heat transfer plate, and the light source plates are arranged in a ring shape around a central axis of the heat transfer plate.
The large-angle light-emitting LED filament lamp according to claim 2, wherein the top of the light source panel is disposed closer to a central axis of the heat transfer plate than the bottom thereof, and the connecting portion is respectively provided corresponding to the light source panel. Inclined heat transfer surface.
The LED lamp lamp of claim 1 , further comprising a bulb shell, wherein a bottom cover of the bulb shell is disposed on the heat transfer plate and the light source panel is received therein, the bulb shell is a hemispherical bulb structure, the LED light source on the light source plate near the bottom of the substrate is disposed corresponding to the bottom of the bulb shell, and the bottom of the bulb shell is used to place most of the LED light source on the light source panel near the bottom of the substrate The light is refracted toward the direction of the heat transfer plate.
The large-angle light-emitting LED filament lamp according to claim 4, wherein the bulb shell is a transparent or translucent structure made of plastic or glass, and the bulb shell may be provided with a light diffusing material.
The large angle illuminating LED filament lamp of claim 1 wherein the LED light source on each of the light source panels is packaged together by a phosphor layer to form a surface illuminating source.
The high-angle light-emitting LED filament lamp according to claim 1, wherein the substrate is made of a transparent or translucent material, and a part of the light emitted by the LED light source is emitted outward through the substrate.
The large-angle light-emitting LED filament lamp according to claim 1, wherein the base body is provided with a heat dissipating portion, and the heat transfer plate is thermally connected to the heat dissipating portion.
The large-angle light-emitting LED filament lamp of claim 1 , wherein the LED light source is disposed on a front surface of the substrate, and a heat conductive layer is further disposed on a back surface of the substrate, and a portion of the heat conductive layer is thermally connected to the connecting portion. .
The large-angle light-emitting LED filament lamp according to claim 9, wherein the substrate is made of a transparent or translucent material, and a part of the light emitted by the LED light source is emitted outward through the substrate, and the heat conducting layer is The position is offset from the position of the LED light source.
The large-angle light-emitting LED filament lamp according to claim 10, wherein the substrate is made of ceramic, high thermal conductivity glass or sapphire material, and the heat conductive layer is a metal silver layer or a metal copper layer attached to the back surface of the substrate. .
The large-angle light-emitting LED filament lamp of claim 1 further comprising a circuit board disposed above the heat transfer plate, wherein the circuit board is provided with a yielding hole corresponding to the connecting portion. Each of the light source boards is further provided with an electrode terminal, and one end of the electrode terminal is electrically connected to the circuit board, and the other end of the electrode terminal is provided with an elastic contact piece, and the bottom of the substrate in each light source board Electrodes are respectively disposed, and the elastic contacts of the electrode terminals are respectively elastically abutted with the electrodes on the light source plate to achieve electrical connection. .