CN113494684A

CN113494684A - Filament lamp and manufacturing method thereof

Info

Publication number: CN113494684A
Application number: CN202010268035.9A
Authority: CN
Inventors: 吴晨俊; 蒋洪奎; 高延增
Original assignee: Leedarson Lighting Co Ltd
Current assignee: Leedarson Lighting Co Ltd
Priority date: 2020-04-08
Filing date: 2020-04-08
Publication date: 2021-10-12
Also published as: EP3892913A1

Abstract

The present application discloses a filament lamp and a manufacturing method thereof. The filament lamp includes a lamp head assembly, a transparent bulb sealed with the lamp head assembly, a stem installed in the lamp head assembly and located in the transparent bulb, a light source strip installed in the stem, and a mixed gas filled in the transparent bulb; mixing The gas contains oxygen, and the volume ratio of oxygen ranges from 1% to 25%. The transparent bulb is sealed with the lamp head assembly, so that the inner space of the transparent bulb forms a closed space, and the space is filled with oxygen containing a certain volume ratio. The indium tin oxide in the chip in the light source strip of the filament lamp is prone to reduction reaction, and oxygen is generated during the reduction reaction, and the transparent bulb is filled with a mixed gas containing oxygen in advance, which can inhibit the reduction of indium tin oxide The reaction makes it difficult to change the properties of the light source bar itself, and thus is not prone to light decay, and maintains a high luminous flux maintenance rate sustainably.

Description

Filament lamp and manufacturing method thereof

Technical Field

The application relates to the field of lamps, in particular to a filament lamp and a manufacturing method thereof.

Background

The LED filament lamp can realize 360-degree full-angle light emission, large-angle light emission is realized, a lens is not needed, a three-dimensional light source is realized, and a good lighting effect is achieved.

However, in the related art, the filament lamp is prone to light decay after being used for a certain period of time, the lighting effect is significantly reduced, and a stable lighting effect cannot be provided for a long time.

Disclosure of Invention

An object of the application is to provide a filament lamp, aim at solving prior art, the problem of the light decay takes place easily for the filament lamp.

To achieve the purpose, the embodiment of the application adopts the following technical scheme:

the filament lamp comprises a lamp cap assembly, a transparent bulb, a core column, a light source strip and mixed gas, wherein the transparent bulb is hermetically connected with the lamp cap assembly; the mixed gas contains oxygen, and the volume ratio of the oxygen is 1-25%.

In one embodiment, the mixed gas further comprises one or more of helium, argon, neon or krypton.

In one embodiment, the mixed gas consists of helium and the oxygen; the volume ratio of the oxygen is less than or equal to 20%, and the volume ratio of the helium is greater than or equal to 80%.

In one embodiment, the oxygen is 20% by volume; the volume ratio of the helium gas is 80%.

In one embodiment, the oxygen is 10% by volume; the volume ratio of the helium gas is 90%; or the volume ratio of the oxygen is 5%; the volume ratio of the helium gas is 95%.

In one embodiment, the lamp head assembly comprises a lamp head main body and a driving plate arranged in the lamp head main body; the core column is internally provided with Dumet wires; the light source strip is electrically connected with the driving plate through the Dumet wire.

In one embodiment, the lamp head assembly further comprises an eye piece provided on the lamp head body and a lining member mounted in the lamp head body, and the driving board is mounted on the lining member.

In one embodiment, the stem and the transparent bulb are both glass pieces.

It is a further object of the present application to provide a method of manufacturing a filament lamp, which can be used to manufacture the filament lamp in any of the above embodiments, comprising the steps of:

mounting a light source strip on the stem;

hermetically connecting a transparent bulb with the stem having an inflation hole such that the light source strip is located within the transparent bulb;

pumping out air in the transparent bulb through the air charging hole;

filling mixed gas with the oxygen content range of 1% -25% into the transparent bulb through the gas filling hole;

sealing the inflation hole;

and mounting the core column on the lamp holder assembly.

In one embodiment, the stem and the transparent bulb are both glass pieces; the method comprises the following steps of hermetically connecting a transparent bulb with a core column with an inflation hole:

and heating and melting the contact part of the transparent bulb and the core column, and cooling to realize sealing connection.

In one embodiment, the stem is a glass piece; the step of sealing the inflation hole is specifically as follows:

and heating and melting the core column at the inflation hole, and then sealing the inflation hole by using the melting material.

In one embodiment, the step of filling a mixed gas with an oxygen content ranging from 1% to 25% into the transparent bulb through the inflation hole specifically includes:

filling the mixed gas consisting of helium and the oxygen into the transparent bulb; the volume ratio of the oxygen is less than or equal to 20%, and the volume ratio of the helium is greater than or equal to 80%.

In one embodiment, the oxygen is 20% by volume; the volume percentage of the helium gas is 80%; or the volume ratio of the oxygen is 10%; the volume ratio of the helium gas is 90%; or the volume ratio of the oxygen is 5%; the volume ratio of the helium gas is 95%.

The beneficial effects of the embodiment of the application are as follows: the transparent bulb is connected with the lamp holder assembly in a sealing mode, so that an airtight space is formed in the inner space of the transparent bulb, and oxygen with a certain volume ratio is filled in the space. Indium tin oxide in a chip in a light source bar of a filament lamp is easy to generate reduction reaction, oxygen can be generated in the process of the reduction reaction, and mixed gas containing the oxygen is filled in a transparent bulb in advance, so that the reduction reaction of the indium tin oxide can be inhibited, the self property of the light source bar is not easy to change, the phenomenon of light decay is not easy to occur, and the high luminous flux maintenance rate can be continuously maintained.

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 without creative efforts.

FIG. 1 is a schematic structural view of a filament lamp according to an embodiment of the present application;

FIG. 2 is an exploded view of the filament lamp of FIG. 1;

FIG. 3 is a graph showing the effect of maintaining luminous flux when different gases (80% plus 20% oxygen and helium alone) are filled in a transparent bulb according to an embodiment of the present application;

FIG. 4 is a flow chart of a method of making a filament lamp in an embodiment of the present application;

in the figure:

1. a lamp head assembly; 11. a lamp cap main body; 12. a drive plate; 13. eye patches; 14. a lining member;

2. a transparent bulb; 3. a stem; 4. a light source strip.

Detailed Description

In order to make the objects, technical solutions and advantages of the present application more apparent, the present application is described in further 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, refer to an orientation or positional relationship illustrated in the drawings for convenience in describing the present application and to simplify description, and do not indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and thus should not be construed 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 following detailed description of implementations of the present application is provided in conjunction with specific embodiments.

As shown in fig. 1-2, an embodiment of the application provides a filament lamp, which includes a lamp cap assembly 1, a transparent bulb 2 hermetically connected to the lamp cap assembly 1, a stem 3 installed on the lamp cap assembly 1 and located inside the transparent bulb 2, a light source bar 4 installed on the stem 3, and a mixed gas filled in the transparent bulb 2; the mixed gas contains oxygen, and the volume ratio of the oxygen is 1-25%.

In the embodiment of the application, the transparent bulb 2 is hermetically connected with the lamp cap assembly 1, so that a closed space is formed in the inner space of the transparent bulb 2, and oxygen with a certain volume ratio is filled in the closed space. Indium tin oxide in a chip in a light source bar 4 of the filament lamp is easy to generate reduction reaction, oxygen can be generated in the process of the reduction reaction, and mixed gas containing oxygen is filled in the transparent bulb 2 in advance, so that the reduction reaction of the indium tin oxide can be inhibited, the self property of the light source bar 4 is not easy to change, the phenomenon of light decay is not easy to occur, and the high luminous flux maintenance rate can be continuously maintained.

In another embodiment of the filament lamp provided herein, the mixed gas further comprises one or more of helium, argon, neon, or krypton. The gas has good thermal conductivity, and can rapidly transfer heat generated by the light source strip 4 outwards so as to prevent the temperature inside the filament lamp from being higher than the normal use temperature.

As another specific embodiment of the filament lamp provided herein, the mixed gas is composed of helium and oxygen; the volume ratio of oxygen is less than or equal to 20%, and the volume ratio of helium is greater than or equal to 80%. After a large number of experiments, the inventor finds that after the transparent bulb 2 is filled with oxygen, only when other gases in the mixed gas are helium (without considering the case of impurities), the mixed gas can be ensured to rapidly transmit heat generated by the light source bar 4 to the outside to the greatest extent on the basis of effectively inhibiting the reduction reaction of indium tin oxide in the chip in the light source bar 4.

Referring to fig. 3, as another embodiment of the filament lamp provided herein, the oxygen is 20% by volume; the volume percentage of helium gas is 80%. Based on the above-described volume ratio of hydrogen to oxygen, the inventors have conducted a large number of experiments again to obtain an optimum volume ratio. Finally, it is found that when the volume percentage of oxygen is 20% and the volume percentage of helium is 80%, the reduction reaction of indium tin oxide in the chip in the light source bar 4 can be inhibited to the greatest extent, and the mixed gas can be ensured to provide the heat dissipation capacity suitable for the operation of the light source bar 4.

The upper line in fig. 3 is a mixture of 80% plus 20% oxygen to provide filament lamp maintenance at different light fluxes; the lower line is helium alone to allow maintenance of the filament lamp under different light conditions.

As another specific embodiment of the filament lamp provided herein, the oxygen is present in an amount of 10% by volume; the volume ratio of helium is 90%; or the volume ratio of the oxygen is 5%; the volume fraction of helium was 95%. Specifically, in order to provide the optimum suppression of the reduction reaction of indium tin oxide in the chips in the light source bar 4 and to extend the lifetime of the product, it is appropriate to bias the helium gas to be more in the selection of the volume ratio; for example, helium is 90% or 95% by volume.

In the embodiment of the application, the volume ratio of helium in the mixed gas composed of oxygen and helium can be 75%, 76%, 77%, 78%, 79% … … 88% … … 97%, 98% or 99%; corresponding to oxygen in a volume ratio of 25%, 24%, 23%, 22%, 21% … … 12% … … 3%, 2% or 1%.

Referring to fig. 2, as another embodiment of the filament lamp provided by the present application, the lamp head assembly 1 includes a lamp head main body 11 and a driving board 12 disposed in the lamp head main body 11; the core column 3 is internally provided with Dumet wires; the light source strip 4 is electrically connected to the drive plate 12 via dumet wire. When the stem 3 is made of glass, the dumet wire has a thermal expansion rate similar to that of the glass, and the stem 3 is not easily cracked when it is thermally expanded.

Referring to fig. 2, as another embodiment of the filament lamp provided by the present application, the lamp cap assembly 1 further includes an eye piece 13 disposed on the lamp cap main body 11 and an inner lining member 14 installed inside the lamp cap main body 11, and the driving plate 12 is installed on the inner lining member 14, so as to ensure the stability of the installation of the driving plate 12.

Referring to fig. 1-2, as another embodiment of the filament lamp provided by the present application, the stem 3 and the transparent bulb 2 are glass pieces, so that the transparent bulb 2 and the glass pieces are melted and cooled to complete the connection when the two are hermetically connected. When the filament lamp is processed, the transparent bulb 2 and the core column 3 which are made of glass materials are arranged on the existing sealing and exhausting machine, the machine does not need to be developed additionally, and the cost of machine development is saved.

As shown in fig. 4, the present application further provides a method for manufacturing a filament lamp, which can be used to manufacture the filament lamp of any of the above embodiments, including the following steps:

mounting the light source strip 4 on the stem 3;

the transparent bulb 2 is hermetically connected with a core column 3 with an inflation hole, so that a light source strip 4 is positioned in the transparent bulb 2;

air in the transparent bulb 2 is pumped out through the air inflation hole;

filling mixed gas with the oxygen content range of 1-25% into the transparent bulb 2 through the gas filling hole;

sealing the inflation hole;

the stem 3 is mounted on the burner assembly 1.

And evacuating the air in the transparent bulb 2 from the inflation hole on the core column 3 by using a device such as an air pump, and filling the mixed gas containing 1-25% of air by volume into the transparent bulb 2 from the inflation hole by using other devices such as air pumps. The oxygen in the mixed gas can inhibit the reduction reaction of indium tin oxide in the chips of the light source strip 4 in the filament lamp. The properties of the light source strip 4 are not easy to change, and then the phenomenon of light decay is not easy to occur, and the high luminous flux maintenance rate can be continuously kept.

Referring to fig. 1, as another embodiment of the method for manufacturing a filament lamp provided in the present application, a stem 3 and a transparent bulb 2 are both glass pieces; the method comprises the following steps of hermetically connecting a transparent bulb 2 with a core column 3 with an inflation hole:

and heating and melting the contact part of the transparent bulb 2 and the core column 3, and cooling to realize sealing connection.

Therefore, the sealing and exhausting machine in the prior art can be directly utilized without additionally developing the machine, and the development cost of the machine is saved.

Referring to fig. 1, as another embodiment of the method for manufacturing a filament lamp provided by the present application, a stem 3 is a glass member; the step of sealing the inflation hole is as follows:

the stem 3 is heated and melted at the inflation hole, and then the inflation hole is sealed by the melted material. For example, the gas filling hole may be a funnel on the stem 3, the funnel is cut after heating and melting, and the glass at the melting point is naturally sealed after cooling.

Referring to fig. 1, as another specific embodiment of the method for manufacturing a filament lamp provided by the present application, the step of filling a mixed gas with an oxygen content ranging from 1% to 25% into a transparent bulb 2 through an inflation hole specifically includes:

filling a mixed gas consisting of helium and oxygen into the transparent bulb 2; the volume ratio of oxygen is less than or equal to 20%, and the volume ratio of helium is greater than or equal to 80%.

After a large number of experiments, the inventor finds that after the transparent bulb 2 is filled with oxygen, only when other gases in the mixed gas are helium (without considering the case of impurities), the mixed gas can be ensured to rapidly transmit heat generated by the light source bar 4 to the outside to the greatest extent on the basis of effectively inhibiting the reduction reaction of indium tin oxide in the chip in the light source bar 4.

As another specific embodiment of the method for manufacturing a filament lamp provided by the present application, the volume ratio of oxygen is 20%; the volume ratio of helium is 80%; or the volume ratio of the oxygen is 10%; the volume ratio of helium is 90%; or the volume ratio of the oxygen is 5%; the volume fraction of helium was 95%.

Specifically, in order to provide the optimum suppression of the reduction reaction of indium tin oxide in the chips in the light source bar 4 and to extend the lifetime of the product, it is appropriate to bias the helium gas to be more in the selection of the volume ratio; for example, helium is 90% or 95% by volume.

It is to be understood that aspects of the present invention may be practiced otherwise than as specifically described.

It should be understood that the above examples are merely examples for clearly illustrating the present application, and are not intended to limit the embodiments of the present application. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. Any modification, equivalent replacement, and improvement made within the spirit and principle of the present application shall be included in the protection scope of the claims of the present application.

Claims

1. The filament lamp is characterized by comprising a lamp cap assembly, a transparent bulb, a core column, a light source strip and mixed gas, wherein the transparent bulb is hermetically connected with the lamp cap assembly; the mixed gas contains oxygen, and the volume ratio of the oxygen is 1-25%.

2. The filament lamp of claim 1 wherein the mixture of gases further comprises one or more of helium, argon, neon, or krypton.

3. The filament lamp of claim 1 wherein the mixed gas is comprised of helium and the oxygen; the volume ratio of the oxygen is less than or equal to 20%, and the volume ratio of the helium is greater than or equal to 80%.

4. The filament lamp of claim 3 wherein the oxygen is 20% by volume; the volume ratio of the helium gas is 80%.

5. The filament lamp of claim 3 wherein the oxygen is present in an amount of 10% by volume; the volume ratio of the helium gas is 90%; or the volume ratio of the oxygen is 5%; the volume ratio of the helium gas is 95%.

6. The filament lamp of any of claims 1-5, wherein the lamp head assembly comprises a lamp head body and a driver board disposed within the lamp head body; the core column is internally provided with Dumet wires; the light source strip is electrically connected with the driving plate through the Dumet wire.

7. The filament lamp of any of claims 1-5, wherein the stem and the transparent bulb are glass pieces.

8. A method of manufacturing a filament lamp, which can be used to manufacture a filament lamp according to any one of claims 1 to 7, comprising the steps of:

mounting a light source strip on the stem;

pumping out air in the transparent bulb through the air charging hole;

sealing the inflation hole;

and mounting the core column on the lamp holder assembly.

9. The method of claim 8, wherein the stem and the transparent bulb are glass pieces; the method comprises the following steps of hermetically connecting a transparent bulb with a core column with an inflation hole:

10. The method of making a filament lamp according to claim 8 or 9 wherein the stem is a glass piece; the step of sealing the inflation hole is specifically as follows: