CN202141017U - A semiconductor solid state lighting tube - Google Patents
A semiconductor solid state lighting tube Download PDFInfo
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- CN202141017U CN202141017U CN201120220717U CN201120220717U CN202141017U CN 202141017 U CN202141017 U CN 202141017U CN 201120220717 U CN201120220717 U CN 201120220717U CN 201120220717 U CN201120220717 U CN 201120220717U CN 202141017 U CN202141017 U CN 202141017U
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- fluorescent tube
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Abstract
The utility model discloses a semiconductor solid state lighting tube, comprising an outer layer housing, an inner layer housing disposed inside the outer layer housing; a circuit board fixed between the outer layer housing and the inner layer housing and provided with lighting components, and end units disposed on both ends of the outer layer housing and the inner layer housing. An enclosed annular heat conducting chamber is formed by the outer layer housing, the inner layer housing, and the end units and is provided with heat conducting liquid inside. Heat emitted by the lighting components and the circuit board is transmitted to the heat conducting liquid directly and the heat conducting liquid transmits the heat to the outer layer housing, which transmits the heat to the outside directly, so the semiconductor solid state lighting tube has commendable heat dissipation effect; compared with a conventional lighting tube with a metal heat conducting structure, the semiconductor solid state lighting tube has a simple structure and less processing difficulty during the process of manufacture, thereby saving time and cost; and the heat conducting liquid having light-admitting quality is capable of being contacted with the lighting components and the circuit board fully, thereby improving an effective heat dissipation area and heat dissipation efficiency.
Description
Technical field
The utility model relates to the light illumination field, in particular, relates to the semi-conductor solid-state light source fluorescent tube.
Background technology
Be that the semiconductor solid-state spot light technology of representative possesses advantages such as light efficiency height, good reliability, controllability are good, energy-conserving and environment-protective with LED, possess great competition potential, penetration and promotion rapidly.The limit of working temperature that can bear owing to semiconductor light-source cores such as LED can only reach 100-150 ℃ scope, compares with the metallic filament of traditional lighting scheme to differ more than the nearly one magnitude.When DIE Temperature was too high, the luminous efficiency of light source device and life-span all can reduce significantly, and therefore, the heat-sinking capability of light source device becomes one of decisive factor of light fixture reliability of products.
At present, have the circuit structure that the light source fluorescent tube mainly comprises thermal conductive shell, is arranged on the conductive structure of enclosure and has the light source core now.Wherein, conductive structure and the shell of being responsible for heat radiation, most of metal that adopts, material such as aluminium or copper for example is to obtain necessary heat conduction and heat dispersion; In the portioned product, in order to obtain better heat conductivility, the circuit structure part has also adopted aluminum base PCB.
In research and practice process to prior art, the inventor of the utility model finds that there is following problem in prior art:
One of which, the inner most of structure of fluorescent tube is all made with metal material, in manufacturing process; Need multiprogramming could metal material be made into conductive structure and shell; So difficulty of processing is big, packaging technology is complicated, thereby for the large-scale production of light fixture product very big restriction is arranged;
Its two, the connection between the radiator structure spare of rigidity must be filled Heat Conduction Material in order to guarantee efficiently the heat conduction, has limited heat-conducting area, has reduced heat transfer efficiency.Simultaneously, further increased process complexity, the long-time stability of packing material also can produce negative effect to a certain degree to reliability of products and life-span;
Its three, therefore heat radiating metal structure itself is light tight, must dodge at light direction; This has just reduced the effective area that carries out heat exchange with surrounding air; Make the power density of fluorescent tube be restricted, under the physical dimension of regulation, can't realize bigger power output.
The utility model content
In view of this, the purpose of design of the utility model is, the semi-conductor solid-state light source fluorescent tube of a kind of simple in structure, handling ease, reliability height and good heat dissipation effect is provided.
The utility model embodiment is achieved in that
A kind of semi-conductor solid-state light source fluorescent tube comprises:
Outer casing;
Be arranged on the inner internal layer shell of said outer casing;
Be fixed between said internal layer shell and the outer casing, and have the circuit board of light source device and heater members;
Be arranged on the end unit at said outer casing and internal layer shell two ends;
Wherein, form airtight annular thermal conductive cavity between said outer casing, internal layer shell and the end unit, have heat-conducting liquid in the said airtight annular thermal conductive cavity.
Preferably, in above-mentioned semi-conductor solid-state light source fluorescent tube, also comprise a plurality of insulating units that are arranged between said outer casing and the internal layer shell;
Said annular thermal conductive cavity is divided into a plurality of airtight annular heat conduction sections by said a plurality of insulating units.
Preferably, in above-mentioned semi-conductor solid-state light source fluorescent tube, said circuit board is arranged in two side semi-rings being cut apart by the middle vertical plane of said annular thermal conductive cavity.
Preferably, in above-mentioned semi-conductor solid-state light source fluorescent tube, in each annular heat conduction section, only have on the circuit board of a side light source device and heater members are installed.
Preferably, in above-mentioned semi-conductor solid-state light source fluorescent tube, light source device in two adjacent annular heat conduction sections and heater element are arranged on the circuit board of homonymy not.
Preferably, in above-mentioned semi-conductor solid-state light source fluorescent tube, said circuit board is arranged in some side semi-rings of being cut apart by the middle vertical plane of said annular thermal conductive cavity.
Preferably, in above-mentioned semi-conductor solid-state light source fluorescent tube, said circuit board with light source device adopts insulating coating technology, passivating technique or encapsulating technology to handle.
Preferably, in above-mentioned semi-conductor solid-state light source fluorescent tube, the inside of said internal layer shell has cavity;
Said internal layer shell is provided with groove structure vertically, said outer casing is provided with tongue structure vertically or satisfies above-mentioned two combining structure simultaneously.
Preferably, in above-mentioned semi-conductor solid-state light source fluorescent tube, the set inside of said internal layer shell has support frame.
Preferably, in above-mentioned semi-conductor solid-state light source fluorescent tube, said outer casing and internal layer shell all adopt glass or engineering plastics to process.
Compared with prior art, the technical scheme that provides of present embodiment has the following advantages and characteristics:
In the scheme that the utility model provides; The heat that light source device, heater members and circuit board send is directly passed to heat-conducting liquid; With this heat transferred outer casing, outer casing is directly passed to the external world with heat to heat-conducting liquid again, so radiating effect is good; And the fluorescent tube that the utility model provides is with respect to the metal heat-conducting structure, and is simple in structure, and in manufacturing process, difficulty of processing is little, thereby saved time cost; In addition, heat-conducting liquid has light transmission, thus heat-conducting liquid can contact fully with light source device, heater members and circuit board, thereby increased the effective area of heat radiation, have bigger power output to guarantee light source device and heater members.
Description of drawings
In order to be illustrated more clearly in the utility model or technical scheme of the prior art; To do to introduce simply to the accompanying drawing of required use in embodiment or the description of the Prior Art below; Obviously, the accompanying drawing in describing below only is some embodiment of the utility model, for those of ordinary skills; Under the prerequisite of not paying creative work, can also obtain other accompanying drawing according to these accompanying drawings.
The front view of the semi-conductor solid-state light source fluorescent tube that Fig. 1 provides for the utility model embodiment;
The sectional view of the semi-conductor solid-state light source fluorescent tube that Fig. 2 provides for the utility model embodiment.
The specific embodiment
To combine the accompanying drawing among the utility model embodiment below, the technical scheme among the utility model embodiment is carried out clear, intactly description, obviously, described embodiment only is the utility model part embodiment, rather than whole embodiment.Based on the embodiment in the utility model, those of ordinary skills are not making the every other embodiment that is obtained under the creative work prerequisite, all belong to the scope of the utility model protection.
The utility model embodiment provides a kind of semi-conductor solid-state light source fluorescent tube, because there is multiple mode in the concrete realization of this semi-conductor solid-state light source fluorescent tube, is elaborated through specific embodiment below:
See also illustrated in figures 1 and 2; The front view of the semi-conductor solid-state light source fluorescent tube that provides for the utility model shown in Figure 1; The sectional view of the semi-conductor solid-state light source fluorescent tube that provides for the utility model shown in Figure 2; This fluorescent tube comprises: outer casing 1, be arranged on the inner internal layer shell 2 of said outer casing 1, be fixed between said internal layer shell 2 and the outer casing 1 and have the circuit board 4 of light source device 3 and heater members and be arranged on said outer casing 1 and the end unit 5 at internal layer shell 2 two ends; Wherein, Form airtight annular thermal conductive cavity between said outer casing 1, internal layer shell 2 and the end unit 5, have heat-conducting liquid 7 in the said airtight annular thermal conductive cavity.In addition, heater members comprises devices such as resistance, inductance, diode, triode and integrated circuit.
In embodiment illustrated in figures 1 and 2; The heat that light source device 3, heater members and circuit board 4 send is directly passed to heat-conducting liquid 7; Heat-conducting liquid 7 is again with this heat transferred outer casing 1, and outer casing 1 is directly passed to the external world with heat, so radiating effect is good; And the fluorescent tube that the utility model provides is with respect to the metal heat-conducting structure, and is simple in structure, and in manufacturing process, difficulty of processing is little, thereby saved time cost; In addition, heat-conducting liquid 7 has light transmission, thus heat-conducting liquid 7 can contact fully with light source device 3, heater members and circuit board 4, thereby increased the effective area of heat radiation, to guarantee that light source device 3 has bigger power output.
In embodiment illustrated in figures 1 and 2; The fluorescent tube that the utility model provides also comprises a plurality of insulating units 6 that are arranged between said outer casing 1 and the internal layer shell 2, and annular thermal conductive cavity is divided into a plurality of airtight heat insulation relatively annular heat conduction sections by said a plurality of insulating units 6.Wherein, Insulating unit 6 is realized by heat-insulating material or heat insulating construction; Axis direction perpendicular to internal layer shell 2 and outer casing 1; Be installed between internal layer shell 2 and the outer casing 1, the annular thermal conductive cavity between internal layer shell 2 and the outer casing 1 is divided into the annular heat conduction section that several do not have obvious heat exchange each other along axis direction, and the support between realization internal layer shell 2 and the outer casing 1 and light source device 3 and circuit board 4 is fixing.
In embodiment illustrated in figures 1 and 2, circuit board 4 both can be arranged in some side semi-rings of being cut apart by the middle vertical plane of said annular thermal conductive cavity, also can be arranged in two side semi-rings being cut apart by the middle vertical plane of annular thermal conductive cavity.When circuit board 4 is arranged on two side semi-rings; Only have in each annular heat conduction section on the circuit board of a side light source device 3 and heater members are installed, and the light source device in two adjacent annular heat conduction sections 3 and heater members are arranged on the circuit board 4 of homonymy not.Wherein,,, so just realized the both sides bright dipping, guaranteed the requirement of Illumination Distribution so can be in different sections light source device 3 be arranged on the circuit board 4 of homonymy not because insulating unit 6 has been separated out a plurality of annular heat conduction sections.Present embodiment can be arranged the position of light source device 3 according to the requirement of product light direction, but in same annular heat conduction section, light source device 3 is preferably arranged on the circuit board 4 of the same side with heater members.In addition, light source device 3 can adopt hard or flexible PCB assembly with circuit board 4.
In embodiment illustrated in figures 1 and 2, for fear of the electric leakage and the electrochemical reaction of heat-conducting liquid 7, the exposed metal/bare metal part of light source device 3 and circuit board 4 should be carried out the insulation processing of insulating coating processing, passivating technique, encapsulating technology or alternate manner.Overlay film require to guarantee good insulation performance ability, long-term reliability, and alap thermal resistance, and covering material should be compatible with the physics and the chemical property of heat-conducting liquid 7.When other insulation processing mode of employing, also should satisfy aforementioned requirement.
In embodiment illustrated in figures 1 and 2, the inside of internal layer shell 2 has cavity 22, and this internal layer shell 2 is provided with groove 23 vertically; The set inside of said internal layer shell 2 has support frame 21.Wherein, internal layer shell 2 can be processed by glass or engineering plastics, requires lower thermal conductivity; Can arrange support frame 21 in the internal cavities 22 of internal layer shell 2, to guarantee the planform of internal layer shell 2; Internal layer shell 2 can be reserved groove 23 in the position that light source device 3 and circuit board 4 are installed, and obtains bigger space, is convenient to the installation and the light path arrangement of circuit board 4, effectively reduces the volume of heat-conducting liquid 7, reduces the weight and the cost of product; Can threading in the cavity 22 or settle component, make things convenient for the electric connection of lamp tube ends.And the design of cavity of internal layer shell 2 22 and groove 23 can effectively reduce the bulbs of pressure of heat-conducting liquid 7, reduces the requirement of structural strength.When lamp works; Because of temperature raises, expanding can appear in heat-conducting liquid 7, and this moment, internal layer shell 2 can be to groove 23 direction deformation; Enlarge the space between the two-layer housing; Avoid outer casing 1 to bear overweight pressure load, thereby reduced the structural strength requirement of outer casing 1, simplified the design of outer casing 1.In addition,, also tongue structure vertically can be set on outer casing 1, the structure of groove or tongue perhaps is set on outer casing 1 and internal layer shell 2 simultaneously in order to reach same effect.
In embodiment illustrated in figures 1 and 2, outer casing 1 can be processed by clear glass or engineering plastics, requires than high thermal and light transmittance; Can require to adopt minute surface, frosting or grid face form according to product optics.In addition, end unit 5 is unit that lamp tube ends is responsible for sealing and power line is drawn.For straight fluorescent tube product, internal layer shell 2 can use hard material simultaneously with outer casing 1; For crooked fluorescent tube product, a kind of flexible material that uses in internal layer shell 2 and the outer casing 1 is so that produce.
In embodiment illustrated in figures 1 and 2; Falling heat-transfer liquid 7 in the annular heat conduction section of between internal layer shell 2 and outer casing 1 each; Heat-conducting liquid 7 can be conduction oil or mixed solution; Requirement possesses suitable light transmittance, electrical insulating property, thermal conductivity, specific heat capacity, temperature expansion coefficient and the coefficient of viscosity, possesses the fusing point, boiling point, the long-time stability that satisfy product requirement simultaneously, and fire-retardant requirement, environmental requirement and the toxicity requirement of satisfying product.
Briefly introduce the radiating principle of embodiment illustrated in figures 1 and 2 below: the annular heat conduction section that forms between internal layer shell 2 and the outer casing 1 and the one-sided installation of light source device 3 make heat-conducting liquid 7 form circulation automatically along the loop direction.From Fig. 2, can find, be provided with two circuit boards 4 in the annular thermal conductive cavity, wherein, a circuit board 4 comprises light source device 3 and heating component, and 4 of another circuit boards do not have.When lamp works, can be to demarcate to form cold/two semi-ring zones of heat with the middle vertical plane, wherein containing heat-conducting liquid 7 expanded by heating of light source device 3 with the hot-zone of heating component, proportion reduces.The cold-zone temperature of opposite side is relatively low, and proportion is bigger, therefore forms the pressure difference that the hot-zone is pointed in the cold-zone in the bottom, drives heat-conducting liquid 7 and is flowed to the hot-zone by the cold-zone.And after heat-conducting liquid 7 coolings at top; Replenish to the cold-zone; Thereby heat-conducting liquid 7 form heated side-＞top-＞no heated side-＞bottom-＞annularly flow of heated side; Shell is taken away and passed to light source device 3 and the heat that the heating component produces rapidly, further be dispersed into surrounding air.
In embodiment illustrated in figures 1 and 2, the embodiment that the utility model provides has following advantage in the heat radiation angle:
The first, light source device 3 and heater element integral body are immersed in the conductive fluid; Its heat can pass to heat-conducting liquid 7 rapidly; Crucial internal heat transfer interface; All be that liquid contacts with solid with outer casing, thereby guaranteed the reliability of hot transmission with heat-conducting liquid 7, heat-conducting liquid 7 like light source device 3.
The second, heat-conducting liquid 7 can form convection current in the annular heat conduction section that two side bodies are constituted, and obtains to conduct better heat-transfer effect than simple heat.The formation of convection current is to utilize ring-shaped liquid structure and one-sided heater element to arrange automatically to form, and need not the drive unit of liquid circulation, and simple in structure, reliability is high.
Three, the contact-making surface of whole fluorescent tube and extraneous air all is effective radiating surface, can internal heat be passed to surrounding air rapidly, so the area of dissipation utilization rate of fluorescent tube that the utility model provides and external environment condition is high.
Four, for traditional solid heat transfer mode, because the thermal source device is distributed in different spatial positions, its heat-transfer capability there are differences, and causes the temperature rise between each thermal source device inconsistent, and product reliability will be by the poorest device decision of condition of work.And this programme is because the flowability of heat-conducting liquid 7; Each thermal source device can guarantee identical temperature rise basically; The situation of avoiding the product of the too high initiation of individual elements temperature rise to lose efficacy in advance; Product reliability can access sizable improvement, so the internal temperature high conformity of the fluorescent tube that the utility model provides.
Five, the adaptive ability that possesses radiating efficiency.Along with the increase of heating power, the temperature difference in cold and hot district increases, and hot-zone heat-conducting liquid 7 expands and aggravates, and proportion is littler, and pressure difference increases; Simultaneously, the coefficient of viscosity of liquid reduces under the high temperature, and the flowability of heat-conducting liquid 7 is higher.Above-mentioned two aspect combined factors effects make the liquid circulation accelerate, and heat conduction and heat-sinking capability are promoted synchronously.This characteristic makes entire circuit in than the power bracket of broad and ambient temperature range, keep more stable condition of work, can simplify circuit design, improves the stability and the photoelectric efficiency of product bright dipping.
Therefore, the fluorescent tube that the utility model provides has good heat conduction and radiating effect, thereby has effectively controlled the temperature rise of light source device 3, improves reliability of products and life-span.
In embodiment illustrated in figures 1 and 2, the embodiment that the utility model provides has following advantage aspect manufacturability and cost:
The first, the applied material of scheme that provides of the utility model is main with glass and engineering plastics, with general approach the compared with metal of the main aluminium that adopts, copper and so on, its volume unit price possesses clear superiority.
The second, the structural design that scheme adopted and the material that provide of the utility model; The technology that be suitable for extruding, stretching, injection moulding etc. is suitable for large-scale production; With the metal cutting of general approach, dash mill, technology such as fin spiral-lock compares; It is easier to process, and yield rate guarantees that more easily processing cost is lower;
Three, the structural design that scheme adopted that provides of the utility model and the processing technology that is designed can reduce the generation of waste material, leftover pieces, improve stock utilization, further reduce the material cost of product;
Four, the scheme that provides of the utility model can reduce the area of area, the especially PCB of circuit unit to greatest extent, reduces circuit cost.
Therefore, the fluorescent tube that provides of the utility model has favorable manufacturability and lower cost.
In embodiment illustrated in figures 1 and 2, the embodiment that the utility model provides has following advantage aspect product:
The first, the product that provides of the utility model is the primary structure material with glass or engineering plastics mainly, thereby can make product more attractive in appearance, lighter and handier.
The second, with respect to aluminium of the prior art, copper metal fins radiating mode; If the product long-term work is under the environment of humidity, many dirt, corrosion can appear in the metal surface, and laying dust appears in fin inboard easily; Both of these case can have a strong impact on its radiating effect for the fin radiating mode.Then there is not this problem in the scheme of the utility model; The first does not have the corrosion problem of metal material; It two is no fin heat-dissipating casings; Therefore the tolerance for moist and dirty environment will be better than the metal fins scheme far away, so the product that the utility model provides has better environmental suitability.
Three,, prevent the factor that necessary emphasis was considered when body leakage was design and production with respect to the electric equipment products that adopt the metal shell radiating mode.And because this programme adopts glass or engineering plastics shell, itself be the insulator of electricity, so the design aspect anticreep is much simple, security of products has better assurance.
Four, because the heat exchanger effectiveness of the liquid thermal conductivity that this programme adopted is higher; Therefore can obtain bigger light source device arranging density; Make that the light path design of product is simpler, particularly for some occasion that has special light path to require, advantage is more obvious; So the light path design of the product that the utility model provides is easier, illumination efficiency is higher.
Five, because this product dependence shell is direct and surrounding air exchanges heat radiation, need not other thermal component, the limiting factor that receives is few; Under the condition that adopts flexible inner casing or soft shell, can realize complicated shapes such as bend pipe, coil pipe easily, and need not special technology or equipment, so the scheme that the utility model provides can realize complicated shape.
Six, for the related product of the utility model, the tube wall area of whole fluorescent tube all can carry out heat exchange with surrounding air, and the efficiently radiates heat area of external environment condition is obviously promoted; Shell for given diameter; Its heat-sinking capability is linear with fluorescent tube length basically; Consider aforementioned attainable bend pipe, coil shape, can be in the space that limits the effective length of prolonging lamp tube greatly, add the good result of the mode of this programme liquid circulating heat conduction; The permission power output that feasible acquisition is bigger becomes possibility, so the product that the utility model provides has the ability of bigger power output.
Multiple modification to these embodiment will be conspicuous concerning those skilled in the art, and defined General Principle can realize under the situation of spirit that does not break away from the utility model or scope in other embodiments among this paper.Therefore, the utility model will can not be restricted to these embodiment shown in this paper, but will meet and principle disclosed herein and features of novelty the wideest corresponding to scope.
Claims (10)
1. a semi-conductor solid-state light source fluorescent tube is characterized in that, comprising:
Outer casing;
Be arranged on the inner internal layer shell of said outer casing;
Be fixed between said internal layer shell and the outer casing, and have the circuit board of light source device and heater members;
Be arranged on the end unit at said outer casing and internal layer shell two ends;
Wherein, form airtight annular thermal conductive cavity between said outer casing, internal layer shell and the end unit, have heat-conducting liquid in the said airtight annular thermal conductive cavity.
2. semi-conductor solid-state light source fluorescent tube according to claim 1 is characterized in that, also comprises a plurality of insulating units that are arranged between said outer casing and the internal layer shell;
Said annular thermal conductive cavity is divided into a plurality of airtight annular heat conduction sections by said a plurality of insulating units.
3. semi-conductor solid-state light source fluorescent tube according to claim 2 is characterized in that, said circuit board is arranged in two side semi-rings being cut apart by the middle vertical plane of said annular thermal conductive cavity.
4. semi-conductor solid-state light source fluorescent tube according to claim 3 is characterized in that, in each annular heat conduction section, only has on the circuit board of a side light source device and heater members are installed.
5. semi-conductor solid-state light source fluorescent tube according to claim 4 is characterized in that, light source device in two adjacent annular heat conduction sections and heater element are arranged on the circuit board of homonymy not.
6. semi-conductor solid-state light source fluorescent tube according to claim 2 is characterized in that, said circuit board is arranged in some side semi-rings of being cut apart by the middle vertical plane of said annular thermal conductive cavity.
7. semi-conductor solid-state light source fluorescent tube according to claim 1 is characterized in that, said circuit board with light source device adopts insulating coating technology, passivating technique or encapsulating technology to handle.
8. semi-conductor solid-state light source fluorescent tube according to claim 1 is characterized in that the inside of said internal layer shell has cavity;
Said internal layer shell is provided with groove structure vertically, said outer casing is provided with tongue structure vertically or satisfies above-mentioned two combining structure simultaneously.
9. semi-conductor solid-state light source fluorescent tube according to claim 8 is characterized in that the set inside of said internal layer shell has support frame.
10. according to any described semi-conductor solid-state light source fluorescent tube of claim 1 to 9, it is characterized in that said outer casing and internal layer shell all adopt glass or engineering plastics to process.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201120220717U CN202141017U (en) | 2011-06-27 | 2011-06-27 | A semiconductor solid state lighting tube |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201120220717U CN202141017U (en) | 2011-06-27 | 2011-06-27 | A semiconductor solid state lighting tube |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202141017U true CN202141017U (en) | 2012-02-08 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201120220717U Expired - Lifetime CN202141017U (en) | 2011-06-27 | 2011-06-27 | A semiconductor solid state lighting tube |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202141017U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US10473316B2 (en) | 2014-08-21 | 2019-11-12 | Signify Holding B.V. | Light emitting device with heat conducting fluid |
-
2011
- 2011-06-27 CN CN201120220717U patent/CN202141017U/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US10473316B2 (en) | 2014-08-21 | 2019-11-12 | Signify Holding B.V. | Light emitting device with heat conducting fluid |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20120208 |
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| CX01 | Expiry of patent term |