WO2017181751A1

WO2017181751A1 - Uv filament lamp

Info

Publication number: WO2017181751A1
Application number: PCT/CN2017/071035
Authority: WO
Inventors: 梁旭东; 丛巍
Original assignee: 圆融健康科技（深圳）有限公司
Priority date: 2016-04-21
Filing date: 2017-01-13
Publication date: 2017-10-26
Also published as: CN105822909A

Abstract

Provided are a UV filament and a UV filament lamp, which relate to the technical field of UV LEDs. The UV filament comprises a substrate (100) and a UV LED chip (300), wherein the UV LED chip (300) is fixed on the substrate (100). The UV LED chip is fixed on the substrate to form the UV filament, and the UV filament forms the UV filament lamp, so that the UV filament lamp can emit UV light omnidirectionally, satisfying application requirements of different occasions, and improving applicability of the UV LED chip.

Description

Title of the invention: UV filament lamp

Technical field

[0001] The present invention relates to the field of ultraviolet LED technology, and in particular, to an ultraviolet filament and an ultraviolet filament lamp.

Background technique

[0002] Deep ultraviolet LED (UV LED) has only been mass-produced and put into practical use in recent years. Like ordinary white LEDs, UV LEDs are point sources that do not form 360-degree full-angle "illumination", which greatly limits the use and application of UV LEDs. Traditional mercury lamps do not have such problems, but mercury is poisonous as a heavy metal and has been criticized by people. People are worried about the use of mercury lamps, which cause mercury to leak, which is life-threatening and so on. UV LED has no mercury pollution, and is a good product with environmental protection and energy saving, and has the advantages of long service life. The replacement of mercury lamps by UV LEDs is an inevitable trend. How to make UV LED lamps omnidirectional is an important issue in the field of UV LEDs.

technical problem

[0003] In the prior art, UV LED lamps cannot be illuminated in all directions.

Problem solution

Technical solution

An ultraviolet filament comprising a substrate and an ultraviolet LED chip, the ultraviolet LED chip being fixed on the substrate.

[0005] Further, the substrate is provided with a first conductive strip and a second conductive strip separated from each other; the positive and negative electrodes of the ultraviolet LE D chip are fixed and electrically connected to the first conductive strip and the second conductive strip, respectively connection.

[0006] Further, a solid crystal region is disposed on the substrate; the positive crystal connecting block and the negative electrode connecting block are disposed in the solid crystal region; and the positive electrode and the negative electrode of the ultraviolet LED chip are respectively connected to the positive electrode connecting block and the negative electrode connecting block Fixed and electrically connected.

[0007] Further, the substrate has a plurality of the die bonding regions, and the die bonding regions are electrically connected by a third conductive strip.

[0008] Further, the substrate has a plurality of the die-bonding regions, and the die-bonding regions are electrically connected by an aluminum reflective sheet. [0009] Into - one less

[0010] Into one less

[0011] Into one less

[0012] Into one less

[0013] Into one less

[0014] Into one less

An insulating transmissive film of ultraviolet light is disposed on the board.

[0015] Embodiments of the present invention also provide an ultraviolet filament lamp. The ultraviolet filament lamp includes the above-described ultraviolet filament.

[0016] Further, the ultraviolet filament lamp is a bulb lamp.

[0017] Further, comprising a plurality of the ultraviolet filaments, a UV-transmissive cover body and a lamp cap, the cover body is a bulb-shaped cover body, the cover body is provided with a bracket, and the ultraviolet filament is mounted on the bracket The ultraviolet filament is electrically connected to the lamp cap, and the lamp cap and the cover body form a sealed space.

[0018] Further, the ultraviolet filament lamp is an ultraviolet filament lamp.

[0019] further comprising: a plurality of the ultraviolet filaments, a strip-shaped ultraviolet-transmissive housing, a strip-shaped heat sink and two lamp caps, the lamp cap forming a sealed space with the casing, the ultraviolet filaments being uniformly disposed at On the strip-shaped heat sink, the strip-shaped heat sink is fixed on the lamp cap in the sealed space.

Advantageous effects of the invention

Beneficial effect

[0020] The invention is fixed on the substrate by the ultraviolet LED chip to form an ultraviolet filament, and the ultraviolet filament lamp is formed by the ultraviolet filament, so that the ultraviolet filament lamp emits ultraviolet light at a full angle, which satisfies the application of different occasions, and improves the applicability of the ultraviolet LED chip. .

Brief description of the drawing

DRAWINGS

1 is a schematic perspective view of an ultraviolet filament according to a first embodiment of the present invention.

2 is a top plan view of an ultraviolet filament according to a first embodiment of the present invention.

3 is a schematic cross-sectional structural view of an ultraviolet filament according to a first embodiment of the present invention.

4 is a schematic cross-sectional structural view of an ultraviolet filament according to a second embodiment of the present invention.

5 is a perspective view of an ultraviolet filament according to an embodiment of the present invention. 6 is a schematic perspective view of an ultraviolet filament according to a third embodiment of the present invention.

7 is a schematic structural view of an ultraviolet filament bulb according to an embodiment of the present invention.

8 is a schematic structural view of an ultraviolet filament lamp according to an embodiment of the present invention.

BEST MODE FOR CARRYING OUT THE INVENTION

[0029] Referring to FIG. 1 to FIG. 3, an ultraviolet filament according to a first embodiment of the present invention is proposed. The ultraviolet filament of this embodiment includes a substrate 100 and an ultraviolet LED chip 300, and the ultraviolet LED chip 300 is fixed on the substrate 100. The ultraviolet filament of the embodiment of the present invention does not require the ultraviolet LED chip 300 to be packaged on the holder, thereby saving cost. The invention is fixed on the substrate by the ultraviolet LED chip to form the ultraviolet filament, and the ultraviolet filament lamp is formed by the ultraviolet filament, so that the ultraviolet filament lamp emits ultraviolet light at a full angle, which satisfies the application of different occasions, and improves the applicability of the ultraviolet LED chip. Generally, the ultraviolet filament of the embodiment has a plurality of ultraviolet LED chips 300, which can integrate a plurality of ultraviolet LED chips to meet the needs of different fields. The ultraviolet filament of the embodiment can be applied to form a bulb lamp, and can also be applied to form a fluorescent lamp (ie, a strip lamp or a lamp tube, which emits ultraviolet light), which can be applied to indoor disinfection fields, such as hospital or canteen sterilization, and can also be applied. In the field of light curing, UV lacquer curing is achieved.

[0030] The substrate 100 may be a rigid substrate or a flexible substrate. The material of the rigid substrate may be a glass or a ceramic material or a metal material. The material of the flexible substrate may be a flexible PCB or a flexible plastic. In the embodiment, the substrate 100 is preferably made of a rigid ceramic substrate, which has the advantages of good insulation and heat dissipation performance. In order to improve the efficiency of ultraviolet light emission, the present invention preferably has an ultraviolet light reflecting layer such as an aluminum thin film layer provided on the surface of the substrate 100. In this embodiment, the aluminum thin film layer is formed on the ceramic substrate. Further preferably, a silicon dioxide film layer is formed on the aluminum thin film layer to facilitate the circuit arrangement of the ultraviolet LED chip.

[0031] In this embodiment, the shape of the substrate 100 is preferably elongated to form a filament shape.

[0032] In other embodiments, the substrate 100 is preferably an aluminum substrate having good deep ultraviolet reflection characteristics, which can improve the emission efficiency of ultraviolet light, is not absorbed by the filament itself, and causes ultraviolet light. Unnecessary loss of light. In order to select an aluminum substrate, it is generally required to form an ultraviolet transparent insulating film, such as an insulating silicon dioxide film, on one side of the fixed ultraviolet LED chip of the aluminum substrate.

[0033] In some other embodiments, the material of the substrate 100 is preferably quartz glass or sapphire, forming Quartz glass substrate or sapphire substrate. The quartz glass substrate or the sapphire substrate can transmit ultraviolet rays well, especially ultraviolet rays having a wavelength of 300 nm or less. The quartz glass substrate or the sapphire substrate gives the ultraviolet light a chance to be emitted through the substrate itself, reducing absorption by the filament itself and increasing ultraviolet light emission.

[0034] In this embodiment, the ultraviolet LED chip 300 can be fixed on the substrate 100 in three ways. The first is to fix and electrically connect the UV LED chip 300 in the form of a conductive strip, so that no gold wire connection is required, which reduces cost and improves light efficiency. The second is to fix and electrically connect the ultraviolet LED chip 300 with a solid crystal region and an aluminum reflective sheet, and it is also possible to eliminate the need for a gold wire. The third is to use a combination of a conductive strip and a solid crystal region, or a gold wire.

[0035] In this embodiment, the number of the ultraviolet LED chips 300 in the ultraviolet filament is preferably plural, for example, 5 or 10, and is set as needed. In the above second and third fixing modes, the substrate 100 is provided with a die bonding region corresponding to the number of the ultraviolet LED chips 300. Fig. 5 is a perspective view showing the ultraviolet filament of the embodiment of the present invention. Referring to FIG. 5, the substrate 100 is provided with two die bonding regions 130, and a positive electrode connection block and a negative electrode connection block (not shown) are disposed in the die bonding region. The ultraviolet LED chip 300 is located in the die bonding region 130. The positive and negative electrodes of the ultraviolet LED chip 300 are fixed and electrically connected to the positive electrode connection block and the negative electrode connection block, respectively. In order to form an electrical path between the two ultraviolet LED chips 300, the present embodiment preferably employs an aluminum reflective sheet 230 disposed between the two ultraviolet LED chips 300. The aluminum reflective sheet 230 serves to conduct and reflect ultraviolet light. The width of the aluminum reflective sheet 230 is the same as that of the substrate 100, and the length is greater than the spacing between the two solid crystal regions 130, forming an arch shape, similar to an arch bridge, which is more likely to reflect ultraviolet light. In some embodiments, the third conductive strip can be replaced with a third conductive strip, i.e., the third conductive strip is electrically connected between the die attach regions 130. The third conductive strip can be fabricated in the same manner as the die bonding region 130, is cost effective, and can also be grown using metal deposition techniques. In this embodiment, it is preferable that the material of the third conductive strip is aluminum, which has better ultraviolet light reflecting ability.

[0036] The ultraviolet filament of the present embodiment is preferably provided with a first conductive strip 210 and a second conductive strip 220 separated from each other on the ceramic substrate 100. The first conductive strip 210 and the second conductive strip 220 are independent of each other. The first conductive strip 210 covers one side of the substrate 100, and the second conductive strip 220 covers the other side of the substrate 100. The first conductive strip 210 is electrically connected to the outside through an electrode 241, and the second conductive strip 220 is electrically connected to the outside through the electrode 242. The design of the first conductive strip 210 and the second conductive strip 220 can eliminate the fabrication of the solid crystal region, because the positive and negative electrodes of the ultraviolet LED chip 300 can be fixed and electrically connected to the first conductive strip 2, respectively. 10 and the second conductive strip 220. Therefore, this design can place a plurality of the ultraviolet LED chips 300 without being limited by the solid crystal region. The first conductive strip 210 is electrically connected to the positive electrode of the ultraviolet LED chip 300, and the second conductive strip 220 is electrically connected to the negative electrode of the ultraviolet LED chip 300. The first conductive strip 210 and the second conductive strip 220 may be formed by silk screen printing. The first conductive strip 210 and the second conductive strip 220 are made of conductive silver paste. The first conductive strip 210 and the second conductive strip 220 may also be formed on the surface of the ceramic substrate 100 by metal deposition (ie, two metal layers are formed). For example, it can be deposited by magnetron sputtering. The connection of the metal layer to the electrodes of the UV LED chip 300 can be accomplished in the form of a eutectic. The ultraviolet LED chip 300 is formed on the first conductive strip 210 and the second conductive strip 220. The underside of the ultraviolet LED chip 300 is empty, which facilitates the circulation of air or other gases, and is favorable for heat dissipation.

[0037] The ultraviolet LED chip 300 is preferably a deep ultraviolet LED chip having a wavelength of less than 300 nm, and further preferably the ultraviolet LED chip 300 is a deep ultraviolet LED chip of 240 nm to 290 nm. The ultraviolet LED chip 300 refers to a die that is not packaged. Referring to FIG. 3, the die (the UV LED chip 300) includes a light emitting region 330 and a positive electrode 310 and a negative electrode 320 electrically connected to the light emitting region 330. The light-emitting region 330 includes a sapphire substrate and an N-type semiconductor layer, a light-emitting layer, and a P-type semiconductor layer which are sequentially formed on the sapphire substrate. In this embodiment, the ultraviolet LED chip 300 is preferably a flip chip, and is electrically connected to the first conductive strip 210 and the second conductive strip 220.

[0038] The ultraviolet filament of the embodiment facilitates integration of a plurality of ultraviolet LED chips 300, and has high versatility and applicability.

Embodiments of the invention

[0039] Embodiment 2

4 is a schematic cross-sectional structural view of an ultraviolet filament according to a second embodiment of the present invention. Referring to FIG. 4, the ultraviolet filament of the embodiment differs from the first embodiment in that at least one ultraviolet light reflector 150 is disposed on at least one side of the ultraviolet LED chip 300. The ultraviolet light reflector 150 is shaped into one or more of a cone, a cylinder, and a sphere. The cone can be a cone, a tetrahedron, a faceted cone, and the like. The cylinder may be an elongated cylinder, a cylinder, a multi-faceted cylinder, and an irregular cylinder. The sphere can be a 3/4 sphere, a 1/2 sphere or a complete sphere. In this embodiment, the ultraviolet light reflector 150 is preferably in the shape of a cone to facilitate light emission. [0041] The ultraviolet light reflector 150 can effectively raise the ultraviolet light emitted from the side of the ultraviolet LED chip 300, and improve the light extraction efficiency of the front ultraviolet light.

Embodiment 3

6 is a perspective view of an ultraviolet filament according to a third embodiment of the present invention. Referring to FIG. 6, the ultraviolet filament of the present embodiment is different from the first embodiment in that the substrate 100 includes a base 110 and sidewalls 120 extending upward from both sides of the base 110. The ultraviolet LED chip 300 is located on the substrate. Preferably, the upper surface of the ultraviolet LED chip 300 is flush with the upper surface of the side wall 120 so as not to affect the light output. Further, it is preferable that the angle between the inner side surface 121 of the side wall 120 and the base 110 is greater than 125 degrees and less than 165 degrees, preferably 135 degrees, which is advantageous for reflecting the side light of the ultraviolet LED chip 300. In order for the substrate 100 to have the ability to reflect ultraviolet light, it is preferred that the substrate be made of an aluminum material or that the substrate be plated with an aluminum film.

[0044] Embodiment 4

[0045] Embodiments of the present invention also provide an ultraviolet filament lamp, which comprises the above-mentioned ultraviolet filament.

7 is a schematic structural view of an ultraviolet filament bulb lamp according to an embodiment of the present invention. Referring to FIG. 7, the ultraviolet filament lamp of the embodiment is an ultraviolet filament bulb, and the bulb includes a plurality of the ultraviolet filament 20, a UV-transmissive cover 70 and a base 50, and the cover 70 is in the form of a bulb. The cover body 70 is provided with a bracket 60. The ultraviolet filament 20 is mounted on the bracket 60. The ultraviolet filament 20 is electrically connected to the base 50. The base 50 and the cover 70 form a sealed space. The base 50 has a threaded structure 80 that is electrically connected to the outside and that is fixed.

8 is a schematic structural view of an ultraviolet filament lamp according to an embodiment of the present invention. Referring to Figure 8, the ultraviolet filament lamp of this embodiment is an ultraviolet filament lamp. The ultraviolet filament lamp comprises a plurality of the above-mentioned ultraviolet filaments 20, a strip-shaped ultraviolet-transmissive housing 30, a strip-shaped heat sink 10 and two bases 40. The base 40 forms a sealed space with the housing 30, and the ultraviolet filament 20 is evenly distributed. The strip heat sink 10 is disposed on the strip heat sink 10, and the strip heat sink 10 is fixed on the lamp cap 40 in the sealed space.

Industrial applicability

[0048] The invention is fixed on the substrate by the ultraviolet LED chip to form an ultraviolet filament, and the ultraviolet filament lamp is formed by the ultraviolet filament, so that the ultraviolet filament lamp emits ultraviolet light at a full angle, which satisfies the application of different occasions, and improves the applicability of the ultraviolet LED chip. . In summary, the subject matter of the present application can be manufactured or produced industrially and can produce positive effects.

Claims

Claim

An ultraviolet filament characterized by comprising a substrate and an ultraviolet LED chip, the ultraviolet LED chip being fixed on the substrate.

The ultraviolet filament according to claim 1, wherein the substrate is provided with a first conductive strip and a second conductive strip separated from each other; and a positive electrode and a negative electrode of the ultraviolet LED chip are respectively connected to the first conductive strip And the second conductive strip is fixed and electrically connected.

The ultraviolet filament according to claim 1, wherein the substrate is provided with a solid crystal region; the solid crystal region has a positive electrode connecting block and a negative electrode connecting block; and the positive electrode and the negative electrode of the ultraviolet LED chip are respectively The positive electrode connection block and the negative electrode connection block are fixed and electrically connected. The ultraviolet filament according to claim 3, wherein said substrate has a plurality of said die bonding regions, and said die bonding regions are electrically connected by a third conductive strip.

The ultraviolet filament according to claim 3, wherein said substrate has a plurality of said crystal-crystalline regions, and said crystal-crystalline regions are electrically connected by an aluminum reflective sheet.

The ultraviolet filament according to claim 2 or 3 or 4, wherein said ultraviolet LE

At least one side of the D chip is provided with at least one ultraviolet light reflector.

The ultraviolet filament according to claim 6, wherein the ultraviolet light reflector is in the form of one or more of a cone, a cylinder, and a sphere.

The ultraviolet filament according to claim 1, wherein said substrate comprises a base body and side walls extending upward from both side edges of said base body.

The ultraviolet filament according to claim 8, wherein an angle between an inner side surface of said side wall and said base body is greater than 125 degrees and less than 165 degrees.

The ultraviolet filament according to claim 1 or 8 or 9, wherein the substrate is provided with an ultraviolet light reflecting layer.

The ultraviolet filament according to claim 1 or 8 or 9, wherein the substrate is a quartz glass substrate or a sapphire substrate or an aluminum substrate; and the aluminum substrate is provided with an ultraviolet transparent insulating film.

An ultraviolet filament lamp comprising the ultraviolet filament of any one of claims 1 to 11. [Claim 13] The ultraviolet filament lamp according to claim 12, wherein the ultraviolet filament lamp is a bulb lamp.

The ultraviolet filament lamp of claim 13 , comprising: a plurality of the ultraviolet filaments, a UV-transmissive cover and a lamp cap, wherein the cover is a bulb-like cover, the cover A bracket is disposed in the body, the ultraviolet filament is mounted on the bracket, and the ultraviolet filament is electrically connected to the lamp cap, and the lamp cap and the cover body form a sealed space.

The ultraviolet filament lamp according to claim 12, wherein the ultraviolet filament lamp is a violet filament lamp.

[Claim 16] The ultraviolet filament lamp according to claim 15, comprising a plurality of said ultraviolet filaments, a strip-shaped ultraviolet-transmissive housing, a strip-shaped heat sink and two bases, said lamp holder and said The housing forms a sealed space, and the ultraviolet filament is uniformly disposed on the strip-shaped heat sink, and the strip-shaped heat sink is fixed on the base in the sealed space.