CN108644638A - A kind of LED lamp tube and its application for replacing electrodeless lamp tube - Google Patents
A kind of LED lamp tube and its application for replacing electrodeless lamp tube Download PDFInfo
- Publication number
- CN108644638A CN108644638A CN201810858673.9A CN201810858673A CN108644638A CN 108644638 A CN108644638 A CN 108644638A CN 201810858673 A CN201810858673 A CN 201810858673A CN 108644638 A CN108644638 A CN 108644638A
- Authority
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- China
- Prior art keywords
- lamp tube
- module
- led
- rectification module
- electrodeless
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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- 230000003760 hair shine Effects 0.000 claims 1
- 230000007613 environmental effect Effects 0.000 abstract description 3
- 238000004134 energy conservation Methods 0.000 abstract description 2
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- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 2
- 229910052782 aluminium Inorganic materials 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
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- 239000000428 dust Substances 0.000 description 2
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- 238000005286 illumination Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 238000003855 Adhesive Lamination Methods 0.000 description 1
- 101100100146 Candida albicans NTC1 gene Proteins 0.000 description 1
- 239000004831 Hot glue Substances 0.000 description 1
- 241001465382 Physalis alkekengi Species 0.000 description 1
- -1 Polypropylene Polymers 0.000 description 1
- 239000004743 Polypropylene Substances 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 239000004411 aluminium Substances 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
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- 238000005859 coupling reaction Methods 0.000 description 1
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Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21K—NON-ELECTRIC LIGHT SOURCES USING LUMINESCENCE; LIGHT SOURCES USING ELECTROCHEMILUMINESCENCE; LIGHT SOURCES USING CHARGES OF COMBUSTIBLE MATERIAL; LIGHT SOURCES USING SEMICONDUCTOR DEVICES AS LIGHT-GENERATING ELEMENTS; LIGHT SOURCES NOT OTHERWISE PROVIDED FOR
- F21K9/00—Light sources using semiconductor devices as light-generating elements, e.g. using light-emitting diodes [LED] or lasers
- F21K9/20—Light sources comprising attachment means
- F21K9/27—Retrofit light sources for lighting devices with two fittings for each light source, e.g. for substitution of fluorescent tubes
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21K—NON-ELECTRIC LIGHT SOURCES USING LUMINESCENCE; LIGHT SOURCES USING ELECTROCHEMILUMINESCENCE; LIGHT SOURCES USING CHARGES OF COMBUSTIBLE MATERIAL; LIGHT SOURCES USING SEMICONDUCTOR DEVICES AS LIGHT-GENERATING ELEMENTS; LIGHT SOURCES NOT OTHERWISE PROVIDED FOR
- F21K9/00—Light sources using semiconductor devices as light-generating elements, e.g. using light-emitting diodes [LED] or lasers
- F21K9/20—Light sources comprising attachment means
- F21K9/27—Retrofit light sources for lighting devices with two fittings for each light source, e.g. for substitution of fluorescent tubes
- F21K9/275—Details of bases or housings, i.e. the parts between the light-generating element and the end caps; Arrangement of components within bases or housings
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21K—NON-ELECTRIC LIGHT SOURCES USING LUMINESCENCE; LIGHT SOURCES USING ELECTROCHEMILUMINESCENCE; LIGHT SOURCES USING CHARGES OF COMBUSTIBLE MATERIAL; LIGHT SOURCES USING SEMICONDUCTOR DEVICES AS LIGHT-GENERATING ELEMENTS; LIGHT SOURCES NOT OTHERWISE PROVIDED FOR
- F21K9/00—Light sources using semiconductor devices as light-generating elements, e.g. using light-emitting diodes [LED] or lasers
- F21K9/20—Light sources comprising attachment means
- F21K9/27—Retrofit light sources for lighting devices with two fittings for each light source, e.g. for substitution of fluorescent tubes
- F21K9/278—Arrangement or mounting of circuit elements integrated in the light source
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
- F21V23/00—Arrangement of electric circuit elements in or on lighting devices
- F21V23/02—Arrangement of electric circuit elements in or on lighting devices the elements being transformers, impedances or power supply units, e.g. a transformer with a rectifier
- F21V23/026—Fastening of transformers or ballasts
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B45/00—Circuit arrangements for operating light-emitting diodes [LED]
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B45/00—Circuit arrangements for operating light-emitting diodes [LED]
- H05B45/50—Circuit arrangements for operating light-emitting diodes [LED] responsive to malfunctions or undesirable behaviour of LEDs; responsive to LED life; Protective circuits
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21Y—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21S and F21V, RELATING TO THE FORM OR THE KIND OF THE LIGHT SOURCES OR OF THE COLOUR OF THE LIGHT EMITTED
- F21Y2115/00—Light-generating elements of semiconductor light sources
- F21Y2115/10—Light-emitting diodes [LED]
Abstract
The present invention discloses a kind of LED lamp tube and its application for replacing electrodeless lamp tube, LED lamp tube includes in a ring or the tube body of rectangle, tube body is made of the shell on top and the cover body fastening of lower part, rectification module and LED light module are provided on the inside of shell, there are two ac input end and two DC output ends for rectification module tool, two ac input ends of rectification module are used to be correspondingly connected with two ac output ends of electronic ballast of electrodeless lamp, two of rectification module or in which an ac input end are connected in series with NTC thermistor, two DC output ends of rectification module are being correspondingly connected to LED light module just, cathode.The alternating current that electronic ballast of electrodeless lamp exports is transformed into direct current by the present invention using rectification module; so that LED light module uses; by NTC thermistor so that high pressure when original electronic ballast of electrodeless lamp resonance starts reduces, have the function of protecting LED light module, energy conservation and environmental protection.
Description
Technical field
The invention belongs to LED light technical fields, and in particular to it is a kind of for replace electrodeless lamp tube LED lamp tube and its answer
With.
Background technology
Non-polarized lamp is mainly made of radio-frequency generator, coupler and fluorescent tube/light bulb three parts, passes through the electricity of radio-frequency generator
Magnetic field is inductively coupled in fluorescent tube/light bulb, and the gas avalanche in fluorescent tube/light bulb is made to ionize to form plasma,
Plasma-excited atom gives off ultraviolet light when returning to ground state, the fluorescent powder of tube inner wall is visible by ultraviolet light excitation generation
Light.Non-polarized lamp is the most common illuminations in the places such as industrial and mineral, workshop, street lamp, office, high-altitude.
Traditional high-altitude lamp generally uses Non-polarized lamp, high-voltage gas discharging light（HID）Deng because LED has energy-saving and environmental protection etc.
Advantage, with the continuous maturation of LED technology, it is necessary to be gone to substitute electrodeless lamp tube, HID lamp pipe with LED lamp tube.Due to existing
Non-polarized lamp is generally fitted with electronic ballast of electrodeless lamp, and output current is alternating current, and LED needs DC driven, to realize
It replaces, needs that electric power driving module is installed in LED lamp tube.
Electronic ballast of electrodeless lamp is one kind of ballast, refers to driving electrodeless electric light source using electronic technology, is allowed to produce
The electronic equipment illuminated needed for raw, corresponding is inductance type ballast.Modern fluorescent lamp uses electronics town more and more
Device is flowed, it is light small and exquisite, it might even be possible to electric ballast and fluorescent tube etc. are integrated, meanwhile, electric ballast usually can be with
Starter function is had both, so again capable of fast starting.Electronic ballast of electrodeless lamp can also have more multi-functional, for example can lead to
Cross raising power frequency or current waveform（Such as become square wave）Improve or eliminate the scintillation of fluorescent lamp.
Invention content
In view of the deficiencies in the prior art, technical problem to be solved by the invention is to provide one kind for replacing Non-polarized lamp lamp
The LED lamp tube of pipe and its application, to realize energy-saving and environment-friendly purpose.
In order to solve the above technical problems, the technical solution adopted by the present invention one is：It is a kind of to be used to replace electrodeless lamp tube
LED lamp tube, including in a ring or the tube body of rectangle, the tube body is made of the shell on top and the cover body fastening of lower part, institute
It states and is provided with rectification module and LED light module on the inside of shell, there are two ac input end and two for the rectification module tool
Two ac input ends of DC output end, the rectification module are used to be correspondingly connected with two exchanges of electronic ballast of electrodeless lamp
Output end, two of the rectification module or in which an ac input end are connected in series with NTC thermistor, the rectification mould
Two DC output ends of block are correspondingly connected to the positive and negative electrode of LED light module.
Preferably, temperature protector is additionally provided on the inside of the shell, the temperature protector is connected in series in rectification
Any one ac input end of module.
Preferably, the operating temperature of the temperature protector is 120 ~ 155 DEG C.
Preferably, filter capacitor is additionally provided on the inside of the shell, the filter capacitor is connected to the two of rectification module
Between a DC output end.
Preferably, the filter capacitor is electrolytic capacitor, and the anode of the electrolytic capacitor and the anode of LED light module are simultaneously
Connection connection, the cathode of the electrolytic capacitor and the cathode of LED light module are connected in parallel.
Preferably, current limliting module is additionally provided on the inside of the shell, the current limliting block coupled in series is connected to rectification module
Any one ac input end.
Preferably, the current limliting module is current limiting capacitance.
Preferably, the nominal value of the current limiting capacitance is 0.001 ~ 1 μ F.
Preferably, the rectification module is Schottky rectification bridge.
Preferably, the nominal value of the NTC thermistor is 1 ~ 20 Ω.
In order to solve the above technical problems, the technical solution adopted by the present invention second is that：A kind of LED based on Non-polarized lamp transformation
Two ac input ends of lamp, including electronic ballast of electrodeless lamp and above-mentioned LED lamp tube, the LED lamp tube are correspondingly connected to
Two ac output ends of electronic ballast of electrodeless lamp.
In order to solve the above technical problems, the technical solution adopted by the present invention three is：It is a kind of that Non-polarized lamp is transformed into LED light
Method, the fluorescent tube of Non-polarized lamp is replaced with above-mentioned LED lamp tube, and two ac input ends of LED lamp tube are correspondingly connected with
To two ac output ends of electronic ballast of electrodeless lamp.
Compared with prior art, the invention has the advantages that：The present invention is using NTC thermistor, rectification module
Electrodeless lamp tube is replaced with LED light module, is changed using the alternating current that rectification module exports electronic ballast of electrodeless lamp
At direct current, so that LED light module uses, by NTC thermistor so that original electronic ballast of electrodeless lamp resonance starts
When high pressure reduce, have the function of protect LED light module, electronic ballast of electrodeless lamp start be over after can normal work
Make, due to NTC thermistor as temperature increases and resistance value decline, generated power consumption is also accordingly reduced, eventually reduced
The overall power of LED lamp tube, energy conservation and environmental protection.
Description of the drawings
Fig. 1 is the schematic front view of the embodiment of the present invention one.
Fig. 2 is the schematic top plan view of the embodiment of the present invention one.
Fig. 3 is the circuit diagram of the embodiment of the present invention one.
Fig. 4 is the structural schematic diagram of the embodiment of the present invention two.
It is marked in figure：1, tube body；2, shell；3, cover body；4, vent valve；10, rectification module；20, LED light module；30、
NTC thermistor；40, temperature protector；100, LED lamp tube；200, electronic ballast of electrodeless lamp.
Specific implementation mode
In order to allow the present invention features described above and advantage be clearer and more comprehensible, below spy fors embodiment, and coordinate attached drawing, make in detail
Carefully it is described as follows.
Embodiment one：It is a kind of for replacing the LED lamp tube of electrodeless lamp tube as shown in Fig. 1 ~ 3, including in a ring or rectangle
Tube body 1, the tube body 1 is made of the shell 2 on top and the fastening of cover body 3 of lower part, and the inside of the shell 2 is provided with whole
Flow module 10 and LED light module 20, there are two ac input ends for the tool of the rectification module 10（That is Y2, B1 in Fig. 1（N/A））
With two DC output ends, two ac input ends of the rectification module 10 are for being correspondingly connected with electronic ballast of electrodeless lamp
Two ac output ends, two of the rectification module 10 or in which an ac input end are connected in series with NTC thermistor
30（That is NTC1, NTC2 in Fig. 1）, two DC output ends of the rectification module 10 are correspondingly connected to LED light module 20
Positive and negative electrode（That is LED+, LED- in Fig. 1）.
In the present embodiment, the inside of the shell 2 is additionally provided with temperature protector 40（That is the F1 in Fig. 1）, the temperature
Degree protector 40 is connected in series in any one ac input end of rectification module 10.Wherein, the action of the temperature protector 40
Temperature is preferably but not limited to 120 ~ 155 DEG C.
In the present embodiment, the inside of the shell 2 is additionally provided with filter capacitor 50, and the filter capacitor 50 is connected to whole
Between two DC output ends of flow module 10.Wherein, the filter capacitor 50 is preferably but not limited to electrolytic capacitor（That is Fig. 1
In E1）, anode and the anode of LED light module 20 of the electrolytic capacitor be connected in parallel, the cathode of the electrolytic capacitor and
The cathode of LED light module 20 is connected in parallel.
In the present embodiment, the inside of the shell 2 is additionally provided with current limliting module 60, and the current limliting module 60 is connected in series with
In any one ac input end of rectification module 10.Wherein, the current limliting module 60 is preferably but not limited to current limiting capacitance（Scheme
C1 in 1）, the nominal value of the current limiting capacitance is preferably but not limited to 0.001 ~ 1 μ F.
In the present embodiment, the rectification module 10 is preferably but not limited to Schottky rectification bridge（By Schottky diode
D1, D2, D3 and D4 bridge-type are formed by connecting）, the nominal value of the NTC thermistor 30 is preferably but not limited to 1 ~ 20 Ω.It is described
LED light module 20 includes aluminum substrate and a plurality of adopting surface mounted LED lamp beads（That is in Fig. 1 from LED 1 to LED N）, the aluminium base
Plate radiates as the level-one of light source, and radiating rate is fast, advantageously reduces the light decay degree of light source, the adopting surface mounted LED lamp bead can
To use 2835 lamp bead of high brightness low light attenuation, single lamp brightness to be up to 26-28LM, performance is stablized, brightness energy-saving, than ordinary lamps tube coupling
70% or more energy, while the service life is longer.
In the present embodiment, the cover body 3 is diffusion shell, and the diffusion shell is preferably but not limited to the glass of high light transmission
Cover, PC covers etc., illumination zone is big and effect is good, fire-retardant non-discolouring, entirely lighting, uniform light, soft comfortable；The shell 2
Preferably but not limited to aluminium alloy heat-dissipating casing, for the aluminium alloy heat-dissipating casing as two-class heat dissipation, the aluminium alloy heat dissipation is outer
Multiple radiator structures are evenly arranged at the top of shell, the radiator structure includes at least one heat emission hole, can also include at least
One radiating fin, uses as radiator.
In the present embodiment, vent valve 4 is installed, the main body of the vent valve 4 can be by top layer in the heat emission hole
Filter cloth, gas permeable polymer film, grid reinforcing rib, bottom filter cloth pass sequentially through waterproof and breathable made of hot melt adhesive lamination from top to bottom
Film, the heat emission hole and its interior vent valve 4 radiate as three-level, have the effect of good waterproof and dustproof, ventilative, wherein
Vent valve 4 can filter hydrone and dust, prevent steam and dust from entering lamps and lanterns, make air molecule inside and outside in fluorescent tube
Environment flows freely, and keeps the pressure balance inside and outside fluorescent tube.Wherein, above-mentioned filter cloth material can select polyester fabric,
Polypropylene fiber fabric etc..
Embodiment two：As shown in figure 4, a kind of LED light based on Non-polarized lamp transformation, including electronic ballast of electrodeless lamp 200
It is correspondingly connected to electronic ballast of electrodeless lamp with two ac input ends of above-mentioned LED lamp tube 100, the LED lamp tube 100
200 two ac output ends.Wherein, two ac input ends of the electronic ballast of electrodeless lamp 200 are directly connected to city
Electric unit.
Embodiment three：Referring to FIG. 4, a kind of method that Non-polarized lamp is transformed into LED light, is replaced with above-mentioned LED lamp tube 100
The fluorescent tube of Non-polarized lamp is changed, and two ac input ends of LED lamp tube 100 are correspondingly connected to electronic ballast of electrodeless lamp
200 two ac output ends.
The above, only presently preferred embodiments of the present invention not do limitation in any form to the present invention, any ripe
Those skilled in the art is known in every case without departing from the content of technical solution of the present invention, according to the technical essence of the invention to above real
It applies example and makes any simple modification, equivalent changes and modifications, should all belong to the covering scope of the present invention.
Claims (10)
1. a kind of for replacing the LED lamp tube of electrodeless lamp tube, including in a ring or the tube body of rectangle, it is characterised in that：It is described
Tube body is made of the shell on top and the cover body fastening of lower part, and rectification module is provided on the inside of the shell and LED shines
Module, for the rectification module tool there are two ac input end and two DC output ends, two exchanges of the rectification module are defeated
Enter to hold two ac output ends for being correspondingly connected with electronic ballast of electrodeless lamp, two of the rectification module or in which one
Ac input end is connected in series with NTC thermistor, and two DC output ends of the rectification module are correspondingly connected to LED and shine
The positive and negative electrode of module.
2. the LED lamp tube according to claim 1 for replacing electrodeless lamp tube, it is characterised in that：The shell it is interior
Side is additionally provided with temperature protector, and the temperature protector is connected in series in any one ac input end of rectification module；Wherein,
The operating temperature of the temperature protector is 120 ~ 155 DEG C.
3. the LED lamp tube according to claim 1 or 2 for replacing electrodeless lamp tube, it is characterised in that：The shell
Inside is additionally provided with filter capacitor, and the filter capacitor is connected between two DC output ends of rectification module.
4. the LED lamp tube according to claim 3 for replacing electrodeless lamp tube, it is characterised in that：The filter capacitor
For electrolytic capacitor, the anode and the anode of LED light module of the electrolytic capacitor are connected in parallel, the cathode of the electrolytic capacitor and
The cathode of LED light module is connected in parallel.
5. the LED lamp tube according to claim 1 or 2 for replacing electrodeless lamp tube, it is characterised in that：The shell
Inside is additionally provided with current limliting module, and the current limliting block coupled in series is connected to any one ac input end of rectification module.
6. the LED lamp tube according to claim 5 for replacing electrodeless lamp tube, it is characterised in that：The current limliting module
Nominal value for current limiting capacitance, the current limiting capacitance is 0.001 ~ 1 μ F.
7. the LED lamp tube according to claim 1 for replacing electrodeless lamp tube, it is characterised in that：The rectification module
For Schottky rectification bridge.
8. the LED lamp tube according to claim 1 for replacing electrodeless lamp tube, it is characterised in that：The NTC temperature-sensitives electricity
The nominal value of resistance is 1 ~ 20 Ω.
9. a kind of LED light based on Non-polarized lamp transformation, it is characterised in that：Including electronic ballast of electrodeless lamp and claim 1
Two ac input ends of LED lamp tube, the LED lamp tube are correspondingly connected to two exchange outputs of electronic ballast of electrodeless lamp
End.
10. a kind of method that Non-polarized lamp is transformed into LED light, it is characterised in that：It is replaced with the LED lamp tube of claim 1 electrodeless
The fluorescent tube of lamp, and two ac input ends of LED lamp tube are correspondingly connected to two of electronic ballast of electrodeless lamp exchanges
Output end.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810858673.9A CN108644638A (en) | 2018-07-31 | 2018-07-31 | A kind of LED lamp tube and its application for replacing electrodeless lamp tube |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810858673.9A CN108644638A (en) | 2018-07-31 | 2018-07-31 | A kind of LED lamp tube and its application for replacing electrodeless lamp tube |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108644638A true CN108644638A (en) | 2018-10-12 |
Family
ID=63760447
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810858673.9A Pending CN108644638A (en) | 2018-07-31 | 2018-07-31 | A kind of LED lamp tube and its application for replacing electrodeless lamp tube |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108644638A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US11088623B2 (en) * | 2019-12-11 | 2021-08-10 | Acer Incorporated | Power supply device |
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| KR20120124756A (en) * | 2011-05-04 | 2012-11-14 | 홍삼표 | Led lamp |
| CN203015223U (en) * | 2012-12-26 | 2013-06-19 | 上虞舜宇照明工程有限公司 | LED light fixture capable of matching light fixture of electronic ballast fluorescent lamp |
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| JP2016225266A (en) * | 2015-05-27 | 2016-12-28 | アビス カンパニー，リミテッド | LED lamp |
| CN107178733A (en) * | 2017-07-05 | 2017-09-19 | 江苏松立太阳能科技有限公司 | A kind of LED street lamp head shell |
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- 2018-07-31 CN CN201810858673.9A patent/CN108644638A/en active Pending
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| KR20120124756A (en) * | 2011-05-04 | 2012-11-14 | 홍삼표 | Led lamp |
| CN202022883U (en) * | 2011-05-05 | 2011-11-02 | 常州市泛亚汽车饰件有限公司 | Water-proof breathable film sticker for vehicle lamp |
| CN102305393A (en) * | 2011-05-05 | 2012-01-04 | 常州市泛亚微透科技有限公司 | Waterproof breathable bolt of light-emitting diode (LED) lamp and method for preparing waterproof breathable bolt |
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| CN107787072A (en) * | 2016-08-29 | 2018-03-09 | 黄生林 | The driver of indicator lamp in transformer station's flood monitoring system |
| CN107178733A (en) * | 2017-07-05 | 2017-09-19 | 江苏松立太阳能科技有限公司 | A kind of LED street lamp head shell |
| CN208652185U (en) * | 2018-07-31 | 2019-03-26 | 石狮永峰电子有限公司 | It is a kind of for replacing the LED lamp tube and LED light of electrodeless lamp tube |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US11088623B2 (en) * | 2019-12-11 | 2021-08-10 | Acer Incorporated | Power supply device |
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