CN212960966U

CN212960966U - LED filament lamp

Info

Publication number: CN212960966U
Application number: CN202021361390.2U
Authority: CN
Inventors: 曹亮亮; 吴成宗; 蒋洪奎; 高延增
Original assignee: Zhangzhou Lidaxin Optoelectronic Technology Co ltd
Current assignee: Zhangzhou Lidaxin Optoelectronic Technology Co ltd
Priority date: 2020-07-13
Filing date: 2020-07-13
Publication date: 2021-04-13
Anticipated expiration: 2030-07-13

Abstract

The application provides a LED filament lamp, including lamp holder subassembly, cell-shell, locate stem in the cell-shell, locate the electrically conductive silk on the stem, electric connection in the filament of electrically conductive silk, with electrically conductive silk electric connection and locate the drive assembly in the lamp holder subassembly, the one end and the stem sealing connection that the cell-shell supplied the stem to stretch into, the intussuseption of cell-shell is filled with and is used for radiating inert gas and is used for suppressing the oxygen that the filament carries out reduction reaction. The utility model provides a LED filament lamp through at the inside inert gas that fills of cell-shell, can improve the heat dispersion of LED filament lamp, and the inside oxygen that still fills of cell-shell in addition can restrain the reduction reaction of Indium Tin Oxide (ITO) in the filament to can prevent that the cladding material on the filament from blackening, restrain LED filament lamp promptly and produce the light decay. In addition, hydrogen is not filled in the bulb shell, so that the risk of deflagration of the LED filament lamp can be reduced, and meanwhile, the light decay of the LED filament lamp can be inhibited.

Description

LED filament lamp

Technical Field

The application belongs to the technical field of lamps and lanterns, more specifically says, relates to a LED filament lamp.

Background

In the conventional LED filament lamp in the market, a core column and a bulb shell are generally fused together, gas in the bulb shell is pumped out by using a vacuum pump, and heat-conducting gas is filled to improve the heat-conducting property of the LED filament lamp. The substrate of the filament fixed on the stem is generally a transparent substrate, such as sapphire and glass, and the light attenuation of the LED filament lamp is easily caused due to the low heat conductivity of the transparent substrate. The common heat-conducting gas comprises helium, hydrogen and a mixed gas of helium and hydrogen, and when the helium, the hydrogen or the mixed gas of helium and hydrogen is used as a heat-radiating gas, on one hand, the material of the LED chip coating on the filament is easy to oxidize and blacken under the oxygen-free condition to cause light attenuation; on the other hand, hydrogen belongs to flammable and explosive gas, and is easy to explode and hurt others due to careless operation; on the other hand, hydrogen has small molecules and is easy to leak slowly, so that light decay is caused.

Disclosure of Invention

An object of the embodiment of this application is to provide an LED filament lamp to solve the hydrogen in the heat dissipation gas that exists among the prior art and explode easily, leak, and produce the technical problem of light decay easily.

In order to achieve the purpose, the technical scheme adopted by the application is as follows: the utility model provides a LED filament lamp, includes lamp holder subassembly, cell-shell, locates stem in the cell-shell, locate conductive wire on the stem, electric connection in the filament of conductive wire, with conductive wire electric connection just locates drive assembly in the lamp holder subassembly, the cell-shell supplies the one end that the stem stretched into with stem sealing connection, the cell-shell intussuseption is filled with and is used for radiating inert gas and is used for suppressing the filament carries out reduction reaction's oxygen.

In one embodiment, the volume of oxygen within the envelope is between 1% and 25% of the total volume of gas within the envelope.

In one embodiment, an exhaust pipe is arranged at one end of the stem, a first vent hole and a second vent hole are respectively arranged at two ends of the exhaust pipe, the first vent hole is located in the bulb shell, the second vent hole is located outside the bulb shell, the inert gas and the oxygen enter the bulb shell through the exhaust pipe, and the second vent hole is arranged in a sealing mode after the bulb shell is inflated.

In one embodiment, the stem comprises a stem body, a stem base fixed to one end of the stem body, and the exhaust pipe disposed in the stem base, wherein one end of the exhaust pipe is fixed to an inner wall of the stem base, and the stem base is provided with a through hole for communicating the first vent hole with the cavity in the bulb shell.

In one embodiment, the filament includes a substrate, a light emitting portion disposed on the substrate, two conductive terminals electrically connected to the positive and negative electrodes of the light emitting portion, and a fluorescent glue wrapped around the light emitting portion and the substrate, wherein the two conductive terminals are respectively fixed at two ends of the substrate.

In one embodiment, the substrate is a ceramic substrate, an aluminum substrate, a glass substrate, a sapphire substrate, a graphene substrate, or a copper clad laminate.

In one embodiment, the substrate has a light transmittance of less than or equal to 75%.

In one embodiment, the two ends of the stem are fixed with conductive wires, and the two conductive terminals are respectively fixed and electrically connected to the conductive wires.

In one embodiment, the number of the filament is multiple, and the multiple filaments are distributed circumferentially around the core column.

In one embodiment, at least two of the filaments have different color temperatures; and/or at least one of the filaments has a plurality of color temperatures.

The application provides a LED filament lamp's beneficial effect lies in: compared with the prior art, be fixed with the conducting wire on the stem of this application LED filament lamp, the filament passes through conducting wire and stem and drive assembly electric connection, form and switch on the return circuit, the one end and stem sealing connection that the cell-shell supplied the stem to stretch into, make the inside confined space that forms of cell-shell, through at the inside inert gas that fills of cell-shell, can improve the heat dispersion of LED filament lamp, and the inside oxygen that still fills of cell-shell, can restrain the reduction reaction of Indium Tin Oxide (ITO) in the filament, thereby can prevent that the cladding material on the filament from blackening, it produces the light decay to restrain LED filament lamp promptly. In addition, hydrogen is not filled in the bulb shell, so that the risk of deflagration of the LED filament lamp can be reduced, and meanwhile, the light decay of the LED filament lamp can be inhibited.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the embodiments or the prior art descriptions will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without inventive exercise.

Fig. 1 is a perspective structural view of a first LED filament lamp provided in an embodiment of the present application;

fig. 2 is a three-dimensional structural view of a filament and a stem in a first LED filament lamp according to an embodiment of the present disclosure;

fig. 3 is an exploded view of a first LED filament lamp according to an embodiment of the present disclosure;

fig. 4 is a perspective structural view of a second LED filament lamp provided in the embodiment of the present application;

fig. 5 is a perspective structural view of a filament and a stem in a second LED filament lamp according to an embodiment of the present disclosure.

Wherein, in the figures, the respective reference numerals:

1-cell shell; 2-core column; 21-a column body; 22-column base; 220-a through hole; 23-an exhaust pipe; 231-a first vent; 232-a second vent; 3-a filament; 31-fluorescent glue; 32-conductive terminals; 4-conductive filaments; 5-a drive assembly; 51-a drive cartridge; 52-a driver; 6-a lamp cap assembly; 61-threaded metal shell; 62-drawing pin.

Detailed Description

In order to make the technical problems, technical solutions and advantageous effects to be solved by the present application clearer, the present application is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present application and are not intended to limit the present application.

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, as used herein, refer to an orientation or positional relationship indicated in the drawings that is solely for the purpose of facilitating the description and simplifying the description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus should not be considered as limiting the present application.

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 application, "a plurality" means two or more unless specifically limited otherwise.

The LED filament lamp provided in the embodiments of the present application will now be described.

Referring to fig. 1 to 3, an LED filament lamp provided in an embodiment of the present disclosure includes a bulb shell 1, a stem 2, a conductive filament 4, a filament 3, a driving component 5, and a lamp holder component 6, the conductive filament 4 and the filament 3 are disposed in the bulb shell 1, one end of the stem 2 extends into the bulb shell 1, the conductive filament 4 is fixed on the stem 2, the filament 3 is fixed on the conductive filament 4, the filament 3 is electrically connected to the conductive filament 4, and the conductive filament 4 is further electrically connected to the driving component 5, so that the filament 3, the conductive filament 4, and the driving component 5 form a conductive loop. Bubble shell 1 has the opening that supplies stem 2 to stretch into, and stem 2 stretches into in the bubble shell 1 from this opening, and bubble shell 1 and stem 2 sealing connection, the opening part of bubble shell 1 and the surface seal setting of stem 2 promptly for the inside formation airtight space of bubble shell 1. It should be noted that the filament 3 in this application is referred to as an LED filament. Inert gas and oxygen are filled in the bulb shell 1, the heat dissipation performance of the inert gas is good, and the heat dissipation performance of the LED filament lamp can be improved. The bubble shell 1 is not filled with hydrogen, the stability of inert gas and oxygen is good, the explosion risk is avoided, the risk of gas leakage is avoided, and the light attenuation speed can be slowed down. The Indium Tin Oxide (ITO) layer on the filament 3 comprises indium oxide (InO)₂) And tin oxide (SnO)₂) In an oxygen-free environment, the ITO can generate the following chemical reaction: 2InO₂→2InO+O₂,2SnO₂→2SnO+O₂Resulting in reduction of ITO to produce light decay. In this embodiment, the cell shell 1 is filled with a certain amount of oxygen, and in an aerobic environment, the reduction reaction of ITO can be suppressed to a certain extent, and the light attenuation speed can be slowed down.

The LED filament lamp in the above-mentioned embodiment, be fixed with conducting wire 4 on stem 2, filament 3 passes through conducting wire 4 and stem 2 and 5 electric connection of drive assembly, the formation switches on the return circuit, the one end and 2 sealing connection of stem of 1 confession of bulb 2 stretching into of bulb, make 1 inside confined space that forms of bulb, through filling inert gas in 1 inside at the bulb, can improve the heat dispersion of LED filament lamp, and 1 inside still packing of bulb has oxygen, can restrain the reduction reaction of ITO in the filament 3, thereby can prevent that the cladding material on the filament 3 from blackening, restrain LED filament lamp promptly and produce the light decay. In addition, hydrogen is not filled in the bulb shell 1, so that the risk of explosion of the LED filament lamp can be reduced, and meanwhile, the light attenuation of the LED filament lamp can be inhibited.

Optionally, the volume of oxygen in the bulb shell 1 accounts for 1% to 25% of the total volume of the gas in the bulb shell 1, when the volume ratio of the oxygen in the bulb shell 1 is too low, the function of inhibiting ITO reduction cannot be achieved, that is, light attenuation cannot be inhibited and the light transmittance maintenance rate cannot be maintained, when the volume ratio of the oxygen in the bulb shell 1 is too high, the volume ratio of the inert gas is too low, the heat dissipation performance of the LED filament lamp is not good, and particularly when the filament 3 with the transparent substrate is used, the heat dissipation is seriously affected due to too much oxygen in the bulb shell 1 because the heat conductivity of the transparent substrate is poor. And when the volume proportion of oxygen in the bulb shell 1 is 1-25%, the luminous flux maintenance rate can be improved by about 2%, and the heat dissipation capacity of the filament 3 can be ensured. The inert gas can be helium, neon, etc.

In one embodiment of the present application, referring to fig. 2 and 5, an exhaust pipe 23 is disposed at one end of the stem 2, a first vent hole 231 and a second vent hole 232 are respectively disposed at two ends of the exhaust pipe 23, one end of the exhaust pipe 23 having the first vent hole 231 is disposed in the bulb shell 1, one end of the exhaust pipe 23 having the second vent hole 232 is disposed outside the bulb shell 1, and before the second vent hole 232 is sealed, a cavity in the bulb shell 1 is conducted with an external gas through the exhaust pipe 23. After the bulb shell 1 and the stem 2 are fused and sealed together by means of high-temperature open fire and the like, air in the bulb shell 1 is exhausted through the exhaust pipe 23, specifically, the air in the bulb shell 1 can be pumped out by a vacuum pump, then inert gas and oxygen are filled into the bulb shell 1, the second vent hole 232 can be gradually fused while the inert gas and the oxygen are filled, the second vent hole 232 is gradually sealed, so that a closed space is formed in the bulb shell 1, and the inert gas and the oxygen are stored in the closed space.

The shape of the blister 1 is not limited herein, and as shown in fig. 1, the blister 1 may be selected to be hemispherical, as shown in fig. 4, and the blister 1 may be selected to be spindle-shaped.

In one embodiment of the present application, please refer to fig. 2 and 5, the stem 2 includes a stem body 21, a stem seat 22 and an exhaust pipe 23, the stem seat 22 is connected to one end of the stem body 21, with reference to fig. 2, the stem seat 22 is connected to the bottom end of the stem body 21, the exhaust pipe 23 is disposed inside the stem seat 22, one end of the exhaust pipe 23 is connected to the inner wall of the stem seat 22, and the other end of the exhaust pipe 23 extends out of the stem seat 22. The column base 22 can be selected to be hollow, so that the outer wall of the exhaust pipe 23 and the inner wall of the column base 22 are separated from each other, and the space between the column base 22 and the exhaust pipe 23 can be used for wiring. The column base 22 is provided with a through hole 220, the first vent hole 231 is communicated with the cavity in the bulb shell 1 through the through hole 220, namely the through hole 220 is communicated with the first vent hole 231, so that the space in the bulb shell 1 can be conveniently inflated and deflated.

In one embodiment of the present application, referring to fig. 2 and 5, the filament 3 includes a substrate, a light emitting portion, two conductive terminals 32 and a fluorescent glue 31, the light emitting portion is fixed and electrically connected to the substrate, the two conductive terminals 32 are respectively fixed at two ends of the substrate, and the conductive terminals 32 can be metal terminals. The positive and negative poles of the light emitting part are electrically connected to the two conductive terminals 32, respectively, and more particularly, the positive and negative poles of the light emitting part may be connected to the conductive terminals 32 through bonding wires. Fluorescent glue 31 parcel is in the periphery of illuminating part and base plate, and fluorescent glue 31 can reduce the blue light leakage of illuminating part, and when especially the base plate can be passed through, fluorescent glue 31 can effectively prevent blue light from leaking from the non-light tight part of base plate with the base plate parcel.

Optionally, the light transmittance of the substrate is less than or equal to 75%, so that the substrate is a semitransparent substrate or an opaque substrate, blue light leakage can be effectively avoided, damage to human eyes can be avoided, and heat dissipation performance loss caused by too much fluorescent glue 31 does not need to be covered.

Wherein, the substrate is a ceramic substrate; or, the substrate is an aluminum substrate, such as a hard aluminum substrate, a soft aluminum substrate, etc.; or the substrate is a milky white glass substrate, a sapphire substrate, a graphene substrate and the like; alternatively, the substrate is a copper-clad flexible board (FPC). The substrates are all semitransparent or opaque substrates, so that the heat conduction capability of the filament 3 can be improved. Specifically, the heat conductivity coefficient of the transparent material is only below 1w/k.m, and most of the ceramic material is Al₂O₃The thermal conductivity coefficient of the graphene material is about 20w/k.m, the FPC can improve the thermal conductivity through a copper-clad circuit, the highest thermal conductivity of soft aluminum can reach about 200w/k.m, the thermal conductivity of sapphire is about 25w/k.m, and the graphene material can be largeGreatly improving the heat conductivity coefficient in the plane direction. Of course, the substrate may alternatively be a transparent substrate.

Optionally, the two ends of the core column 2 are fixed with the conductive wires 4, and the two conductive terminals 32 are respectively fixed and electrically connected to the conductive wires 4. The conductive wire 4 is used for fixing and supporting the filament 3, so that the filament 3 is suspended at the periphery of the core column 2. More specifically, the stem 2 may be selected from a glass stem, a ceramic stem, and the like. The inside of stem 2 can be the cavity form, is equipped with in the stem 2 of cavity form and walks the line, walks the upper end of line and is connected with conductive filament 4 of stem 2 upper end, and the upper and lower both ends of filament 3 are then connected with two conductive filament 4 through conductive terminal 32, and conductive filament 4 electric connection of stem 2 lower extreme in drive assembly 5 walks the lower extreme of line also with drive assembly 5 electric connection, so forms and switches on the return circuit, for filament 3 power supply. The filament 3 may be filament or strip, and its specific shape and size are not limited here. The filament 3 can be an LED filament and also can be an LED patch lamp strip. The conductive wire 4 can be a metal wire, and the filament 3 can be flexibly adjusted and fixed by changing the length, the direction, the thickness, the hardness and the like of the conductive wire 4. The wire of walking in the stem 2 and drive assembly 5 between accessible metal connecting wire electric connection, in order to guarantee the reliable connection of metal connecting wire and make things convenient for the production of metal connecting wire, the diameter of metal connecting wire is more than or equal to 0.3 mm.

In one embodiment of the present application, referring to fig. 2 and 5, the number of the filaments 3 is multiple, and the multiple filaments 3 are circumferentially distributed around the stem 2. The filaments 3 can be connected in series, in parallel or in a combination of series and parallel. The filament 3 can be in a straight strip shape, a spiral shape or a flexible filament which can be shaped at will. When filament 3 is the vertical stripe, can be the toper and distribute in the periphery of stem 2, perhaps arrange in the periphery of stem 2in the slope of relative stem 2, perhaps arrange in the periphery of stem 2in parallel relative stem 2. When the filament 3 is formed in a spiral shape, it may be spirally arranged on the outer periphery of the stem 2. As shown in fig. 2, the number of the filaments 3 is four, and the filaments 3 are straight and distributed on the periphery of the stem 2in a tapered shape. As shown in fig. 5, the number of the filaments 3 is two, the filaments 3 are straight, and the filaments 3 are obliquely arranged relative to the stem 2 and are arranged at the periphery of the stem 2in a conical shape.

Optionally, each filament 3 has one color temperature, and the color temperatures of at least two filaments 3 are different, so that the filament 3 lamp has multiple color temperatures; or each filament 3 has multiple color temperatures, and the color temperatures of the filaments 3 are the same, so that the LED filament lamp has multiple color temperatures; alternatively, each filament 3 has a plurality of color temperatures, and at least two filaments 3 have different color temperatures, and the LED filament lamp also has a plurality of color temperatures. In the above embodiment, the functions of dimming and color adjustment, color temperature gradient Warmgrow, RGB, RGBW, RGBTW, and the like, color change and dimming can be realized through certain arrangement and driving design.

In one embodiment of the present application, referring to fig. 3, the driving assembly 5 includes a driving box 51 and a driver 52 disposed in the driving box 51, and the trace in the stem 2 and the conductive wire 4 at the lower end are electrically connected to the driver 52. The drive assembly 5 may be provided at the bottom of the stem 2. The lamp head assembly 6 comprises a threaded metal shell 61 and a drawing pin 62 for connecting the threaded metal shell 61 and the drive box 51, the threaded metal shell 61 is used for being rotatably connected with an external interface, and the drive assembly 5 can be arranged in the threaded metal shell 61.

The above description is only exemplary of the present application and should not be taken as limiting the present application, as any modification, equivalent replacement, or improvement made within the spirit and principle of the present application should be included in the protection scope of the present application.

Claims

1. An LED filament lamp, its characterized in that: including lamp holder subassembly, cell-shell, locate stem in the cell-shell, locate conducting wire, electric connection on the stem in the filament, with conducting wire electric connection just locates drive assembly in the lamp holder subassembly, the cell-shell supplies the one end that the stem stretched into with stem sealing connection, the cell-shell intussuseption is filled with and is used for radiating inert gas and is used for suppressing the filament carries out reduction's oxygen.

2. The LED filament lamp of claim 1, wherein: the volume of the oxygen in the bulb shell accounts for 1 to 25 percent of the total volume of the gas in the bulb shell.

3. The LED filament lamp of claim 1, wherein: the one end of stem has the blast pipe, the both ends of blast pipe have first air vent and second air vent respectively, first air vent is located in the cell-shell, the second air vent is located outside the cell-shell, inert gas with oxygen passes through the blast pipe gets into in the cell-shell, just the second air vent is in sealed the setting after the cell-shell is aerifyd.

4. The LED filament lamp of claim 3, wherein: the stem column comprises a column body, a column base fixed at one end of the column body and an exhaust pipe arranged in the column base, wherein one end of the exhaust pipe is fixed on the inner wall of the column base, and the column base is provided with a through hole for communicating the first air hole with the cavity in the bulb shell.

5. The LED filament lamp of claim 1, wherein: the filament includes the base plate, locates illuminating part, electric connection on the base plate in two conductive terminals of the positive negative pole of illuminating part and wrap up in the illuminating part with the fluorescent glue of base plate periphery, two conductive terminals are fixed in respectively the both ends of base plate.

6. The LED filament lamp of claim 5, wherein: the substrate is a ceramic substrate, an aluminum substrate, a glass substrate, a sapphire substrate, a graphene substrate or a copper-clad flexible board.

7. The LED filament lamp of claim 5, wherein: the light transmittance of the substrate is less than or equal to 75%.

8. The LED filament lamp of claim 5, wherein: and the two ends of the core column are both fixed with conductive wires, and the two conductive terminals are respectively fixed and electrically connected with the conductive wires.

9. The LED filament lamp of any of claims 1-8, wherein: the filament quantity is a plurality of, and is a plurality of the filament uses the stem is central circumference distribution.

10. The LED filament lamp of claim 9, wherein: at least two of the filaments have different color temperatures; and/or at least one of the filaments has a plurality of color temperatures.