EP3290773A1 - Led light bulb and fabrication method thereof - Google Patents
Led light bulb and fabrication method thereof Download PDFInfo
- Publication number
- EP3290773A1 EP3290773A1 EP16187181.9A EP16187181A EP3290773A1 EP 3290773 A1 EP3290773 A1 EP 3290773A1 EP 16187181 A EP16187181 A EP 16187181A EP 3290773 A1 EP3290773 A1 EP 3290773A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- light bulb
- led light
- power wire
- power
- wires
- 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.)
- Granted
Links
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 22
- 238000000034 method Methods 0.000 title claims abstract description 19
- 239000011521 glass Substances 0.000 claims description 27
- 238000007599 discharging Methods 0.000 claims description 2
- 238000007789 sealing Methods 0.000 claims description 2
- 238000005476 soldering Methods 0.000 claims description 2
- 230000005611 electricity Effects 0.000 abstract description 5
- 239000007789 gas Substances 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 239000004020 conductor Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 239000011261 inert gas Substances 0.000 description 1
- 230000002045 lasting effect Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
Images
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
- F21K9/23—Retrofit light sources for lighting devices with a single fitting for each light source, e.g. for substitution of incandescent lamps with bayonet or threaded fittings
-
- 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
- F21K9/90—Methods of manufacture
Definitions
- the invention relates to lighting fields, and more particularly, to an LED light bulb and a fabrication method thereof.
- LED light-emitting diode (LED) light bulbs have many advantages such as lasting longer, more energy-efficient, more environmental friendly and reacting more rapidly, which make LED lighting gradually replace traditional lighting.
- a fabrication method of a conventional LED light bulb is shown in Figure 1 .
- a stem 21, an LED filament 22 and two power wires 23 shown in Figure 2-1 are provided.
- the stem 21 is used to support the LED filament 22.
- the stem 21 includes an exhaust tube 211 and a horn-shaped tube 212, wherein the exhaust tube 211 and the two power wires 23 pass through the horn-shaped tube 22.
- step S22 as shown in Figure 2-2
- two ends of the LED filament 22 are soldered to the two power wires 23 passing through the stem 21 to form a semi-finished LED light bulb 24.
- a glass envelope 25 is provided to cover and protect a head part of the semi-finished LED light bulb 24.
- step S24 as shown in Figure 2-4 , a sealer is used to seal the glass envelope 25, and an exhausting machine is used to discharge redundant gas from the glass envelope 25 through the exhaust tube 211.
- step S25 any unnecessary portion of the exhaust tube 211 is removed, and a screw base 26 is provided, making the two power wires 23 electrically connected to the screw base 26 respectively, thereby forming a finished LED light bulb 2 shown in Figure 2-5 .
- the stem 21 must be provided to support the LED filament 22, making the fabrication method of the LED light bulb 2 complicated and not cost-effective.
- the LED light bulb 2 also requires an internal space 22 for accommodating a front end 213 of the stem 21, such that the LED light bulb 2 cannot be significantly reduced in length and cannot replace all the small-size traditional light bulbs.
- the invention provides an LED light bulb, including: a power wire support set, an LED filament, a glass envelope and a screw base.
- the power wire support set includes a first power wire, a second power wire and at least one fixed block.
- the fixed block fixes the first and second power wires to make them form a power wire supporting structure.
- An LED filament having two ends respectively soldered to a first end of the first power wire and a first end of the second power wire, making the LED filament supported by the power wire supporting structure; a glass envelope including a head part having a receiving space for receiving the LED filament, and a tail part tapered to clamp and fix second ends of the first and second power wires in position; and a screw base electrically connected to the second ends of the first and second power wires.
- the LED light bulb has a plurality of fixed blocks.
- the fixed block is made of glass.
- the first and second power wires are dumet wires.
- the screw base is soldered to the second ends of the first and second power wires.
- the invention further provides A fabrication method of an LED light bulb, including the steps of: providing an LED filament and a power wire support set, wherein the power wire support set includes a first power wire, a second power wire and at least one fixed block, and the fixed block fixes the first and second power wires to make them form a power wire supporting structure; soldering two ends of the LED filament to a first end of the first power wire and a first end of the second power wire respectively to form a semi-finished LED light bulb; providing a glass envelope, wherein the glass envelope has a receiving space in a head part thereof and a passage in a tail part thereof, allowing the LED filament to pass through the passage to be received in the receiving space; tapering the tail part of the glass envelope and sealing the passage to clamp second ends of the first and second power wires; and providing a screw base, and electrically connecting the second ends of the first and second power wires respectively to the screw base, to form a finished LED light bulb.
- the fabrication method further includes the step of: discharging redundant gas from the receiving space through the passage. Removing an unnecessary portion of the tail part of the glass envelope.
- the invention provides an LED light bulb and a fabrication method thereof, wherein two power wires for supplying electricity are used in place of the stem in the conventional LED light bulb.
- the power wires support and fix an LED filament in position.
- the invention desirably simplifies fabrication processes of the LED light bulb and thereby reduces its fabrication costs.
- the LED light bulb of the invention does not require an internal space for accommodating the stem, and thus its length may be significantly reduced, making the LED light bulb ideally used as a small-size light bulb.
- the fabrication method of the LED light bulb according to the invention includes the following steps shown in Figure 3 .
- an LED filament 12 and a power wire support set 11 are provided.
- the power wire support set 11 includes a first power wire 111, a second power wire 112 and at least one fixed block 113.
- the first and second power wires 111, 112 are electrical conductors and can be dumet wires.
- step S12 as shown in Figure 4-2 , the LED filament 12 has two ends thereof respectively soldered to a first end E1 of the first power wire 111 and a first end E1 of the second wire 112, such that the LED filament 12 may obtain electricity through the first and second power wires 111, 112 and support from the power wire supporting structure to be properly fixed in position.
- a glass envelope 13 is provided, wherein a head part 131 of the glass envelope 13 has a receiving space 1311, and a tail part 132 of the glass envelope 13 has a passage 1321 connected to the receiving space 1311.
- the LED filament 12 and the fixed block 113 may pass through the passage 1321 to be received in the receiving space 1311 and thus be protected by the glass envelope 13.
- step S14 as shown in Figure 4-4 , redundant gas in the receiving space 1311 is discharged through the passage 1321 so as to prevent moisture from staying in the operating environment of the LED filament 12. Then the tail part 132 of the glass envelope 13 is tapered and the passage 1321 is sealed in a manner to clamp second ends E2 of the first and second power wires 111, 112. Any unnecessary portion of the tail part 132 of the glass envelope 13 is removed.
- step S15 as shown in Figure 4-5 , a screw base 14 is provided.
- the second ends E2 of the first and second power wires 111, 112 are electrically connected to the screw base 14 respectively, thereby forming a finished LED light bulb 16.
- FIG 4-5 also shows the structure of the LED light bulb according to the invention.
- the LED light bulb 1 includes: a power wire support set 11, an LED filament 12, a glass envelope 13 and a screw base 14.
- the LED filament 12 has an operating voltage of from 8V to 240V.
- the power wire support set 11 includes a first power wire 111, a second power wire 112 and at least one fixed block 113.
- the first and second power wires 111, 112 provide a path of electricity to the LED filament 12.
- the screw base 14 is used to electrically connect an external power source.
- the first and second power wires 111, 112 may be made of dumet wires.
- the first and second power wires 111, 112 have first ends E1 thereof being soldered to two ends of the LED filament 12 respectively and have second ends E2 thereof being electrically connected to the screw base 14 respectively.
- the fixed block 113 may be, for example, a glass ball, for fixing the first and second power wires 111, 112 to make them form a power wire supporting structure, which is used to provide support for the LED filament 12.
- the fixed block 113 can have a ball shape or any other shape that is easily made.
- a head part 131 of the glass envelope 13 has a receiving space 1311 where the LED filament 12 and the fixed block 113 are received.
- the receiving space 1311 may be filled with inert gas.
- a tail part 132 of the glass envelope 13 is tapered to clamp the second ends E2 of the first and second power wires 111, 112 so as to properly fix the first and second power wires 111, 112 in position and keep the receiving space 1311 intact.
- the invention provides an LED light bulb and a fabrication method thereof, wherein power wires for supplying electricity to an LED filament are used to support and fix the LED filament in position, such that a stem used in a conventional LED light bulb is not needed.
- This desirably simplifies fabrication processes of the LED light bulb and thereby reduces its fabrication costs.
- the LED light bulb of the invention does not require an internal space for accommodating the stem, and thus its length may be significantly reduced, making the LED light bulb ideally used as a small-size light bulb.
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Optics & Photonics (AREA)
- General Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Non-Portable Lighting Devices Or Systems Thereof (AREA)
- Led Device Packages (AREA)
- Fastening Of Light Sources Or Lamp Holders (AREA)
Abstract
Description
- The invention relates to lighting fields, and more particularly, to an LED light bulb and a fabrication method thereof.
- It is known that light-emitting diode (LED) light bulbs have many advantages such as lasting longer, more energy-efficient, more environmental friendly and reacting more rapidly, which make LED lighting gradually replace traditional lighting.
- A fabrication method of a conventional LED light bulb is shown in
Figure 1 . First in step S21, astem 21, anLED filament 22 and twopower wires 23 shown inFigure 2-1 are provided. Thestem 21 is used to support theLED filament 22. Thestem 21 includes anexhaust tube 211 and a horn-shaped tube 212, wherein theexhaust tube 211 and the twopower wires 23 pass through the horn-shaped tube 22. Then in step S22, as shown inFigure 2-2 , two ends of theLED filament 22 are soldered to the twopower wires 23 passing through thestem 21 to form a semi-finishedLED light bulb 24. Then in step S23, as shown inFigure 2-3 , aglass envelope 25 is provided to cover and protect a head part of the semi-finishedLED light bulb 24. Then in step S24, as shown inFigure 2-4 , a sealer is used to seal theglass envelope 25, and an exhausting machine is used to discharge redundant gas from theglass envelope 25 through theexhaust tube 211. Then in step S25, any unnecessary portion of theexhaust tube 211 is removed, and ascrew base 26 is provided, making the twopower wires 23 electrically connected to thescrew base 26 respectively, thereby forming a finishedLED light bulb 2 shown inFigure 2-5 . - Therefore in the conventional
LED light bulb 2, thestem 21 must be provided to support theLED filament 22, making the fabrication method of theLED light bulb 2 complicated and not cost-effective. As shown inFigure 2-5 , theLED light bulb 2 also requires aninternal space 22 for accommodating afront end 213 of thestem 21, such that theLED light bulb 2 cannot be significantly reduced in length and cannot replace all the small-size traditional light bulbs. - In view of the shortages of prior technologies mentioned above, the invention provides an LED light bulb, including: a power wire support set, an LED filament, a glass envelope and a screw base. The power wire support set includes a first power wire, a second power wire and at least one fixed block. The fixed block fixes the first and second power wires to make them form a power wire supporting structure. An LED filament having two ends respectively soldered to a first end of the first power wire and a first end of the second power wire, making the LED filament supported by the power wire supporting structure; a glass envelope including a head part having a receiving space for receiving the LED filament, and a tail part tapered to clamp and fix second ends of the first and second power wires in position; and a screw base electrically connected to the second ends of the first and second power wires.
- Optionally, the LED light bulb has a plurality of fixed blocks. The fixed block is made of glass. The first and second power wires are dumet wires. The screw base is soldered to the second ends of the first and second power wires.
- Moreover, the invention further provides A fabrication method of an LED light bulb, including the steps of: providing an LED filament and a power wire support set, wherein the power wire support set includes a first power wire, a second power wire and at least one fixed block, and the fixed block fixes the first and second power wires to make them form a power wire supporting structure; soldering two ends of the LED filament to a first end of the first power wire and a first end of the second power wire respectively to form a semi-finished LED light bulb; providing a glass envelope, wherein the glass envelope has a receiving space in a head part thereof and a passage in a tail part thereof, allowing the LED filament to pass through the passage to be received in the receiving space; tapering the tail part of the glass envelope and sealing the passage to clamp second ends of the first and second power wires; and providing a screw base, and electrically connecting the second ends of the first and second power wires respectively to the screw base, to form a finished LED light bulb.
- Optionally, the fabrication method further includes the step of: discharging redundant gas from the receiving space through the passage. Removing an unnecessary portion of the tail part of the glass envelope.
- Compared to the conventional technology, the invention provides an LED light bulb and a fabrication method thereof, wherein two power wires for supplying electricity are used in place of the stem in the conventional LED light bulb. The power wires support and fix an LED filament in position. Besides eliminating the need of making the stem, the invention desirably simplifies fabrication processes of the LED light bulb and thereby reduces its fabrication costs. Moreover, the LED light bulb of the invention does not require an internal space for accommodating the stem, and thus its length may be significantly reduced, making the LED light bulb ideally used as a small-size light bulb.
- The above and other aspects, features and other advantages of the present invention will be more clearly understood from the following detailed description taken in conjunction with the accompanying drawings, in which:
-
Figure 1 is a flowchart showing a fabrication method of a conventional LED light bulb. -
Figures 2-1 to 2-5 are schematic diagrams showing an embodiment of the LED light bulb fabricated by the steps shown inFigure 1 . -
Figure 3 is a flowchart showing a fabrication method of an LED light bulb according to the invention. -
Figures 4-1 to 4-5 are schematic diagrams showing an embodiment of the LED light bulb fabricated by the steps shown inFigure 3 . - Embodiments of the present invention will now be described in detail with reference to the accompanying drawings. The invention may, however, be embodied in many different forms and should not be construed as being limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the invention to those skilled in the art. In the drawings, the shapes and dimensions of elements may be exaggerated for clarity, and the same reference numerals will be used throughout to designate the same or like components.
- An embodiment of an LED light bulb according to the invention and a fabrication method thereof are disclosed with reference to
Figures 3 to 4-5 . - The fabrication method of the LED light bulb according to the invention includes the following steps shown in
Figure 3 . - In step S11, as shown in
Figure 4-1 , anLED filament 12 and a powerwire support set 11 are provided. The powerwire support set 11 includes afirst power wire 111, asecond power wire 112 and at least one fixedblock 113. The first andsecond power wires fixed blocks 13, which can be made of glass. Thefixed block 13 is used to fix the first andsecond power wires - In step S12, as shown in
Figure 4-2 , theLED filament 12 has two ends thereof respectively soldered to a first end E1 of thefirst power wire 111 and a first end E1 of thesecond wire 112, such that theLED filament 12 may obtain electricity through the first andsecond power wires LED light bulb 15. - In step S13, as shown in
Figure 4-3 , aglass envelope 13 is provided, wherein ahead part 131 of theglass envelope 13 has areceiving space 1311, and atail part 132 of theglass envelope 13 has apassage 1321 connected to thereceiving space 1311. TheLED filament 12 and thefixed block 113 may pass through thepassage 1321 to be received in thereceiving space 1311 and thus be protected by theglass envelope 13. - In step S14, as shown in
Figure 4-4 , redundant gas in thereceiving space 1311 is discharged through thepassage 1321 so as to prevent moisture from staying in the operating environment of theLED filament 12. Then thetail part 132 of theglass envelope 13 is tapered and thepassage 1321 is sealed in a manner to clamp second ends E2 of the first andsecond power wires tail part 132 of theglass envelope 13 is removed. - In step S15, as shown in
Figure 4-5 , ascrew base 14 is provided. The second ends E2 of the first andsecond power wires screw base 14 respectively, thereby forming a finishedLED light bulb 16. -
Figure 4-5 also shows the structure of the LED light bulb according to the invention. The LED light bulb 1 includes: a power wire support set 11, anLED filament 12, aglass envelope 13 and ascrew base 14. TheLED filament 12 has an operating voltage of from 8V to 240V. The powerwire support set 11 includes afirst power wire 111, asecond power wire 112 and at least one fixedblock 113. The first andsecond power wires LED filament 12. Thescrew base 14 is used to electrically connect an external power source. The first andsecond power wires second power wires LED filament 12 respectively and have second ends E2 thereof being electrically connected to thescrew base 14 respectively. - The fixed
block 113 may be, for example, a glass ball, for fixing the first andsecond power wires LED filament 12. The fixedblock 113 can have a ball shape or any other shape that is easily made. Ahead part 131 of theglass envelope 13 has a receivingspace 1311 where theLED filament 12 and the fixedblock 113 are received. The receivingspace 1311 may be filled with inert gas. Atail part 132 of theglass envelope 13 is tapered to clamp the second ends E2 of the first andsecond power wires second power wires space 1311 intact. - Therefore, the invention provides an LED light bulb and a fabrication method thereof, wherein power wires for supplying electricity to an LED filament are used to support and fix the LED filament in position, such that a stem used in a conventional LED light bulb is not needed. This desirably simplifies fabrication processes of the LED light bulb and thereby reduces its fabrication costs. Moreover, the LED light bulb of the invention does not require an internal space for accommodating the stem, and thus its length may be significantly reduced, making the LED light bulb ideally used as a small-size light bulb.
- The examples above are only illustrative to explain principles and effects of the invention, but not to limit the invention. It will be apparent to those skilled in the art that modifications and variations can be made without departing from the scope of the invention. Therefore, the protection range of the rights of the invention should be as defined by the appended claims.
Claims (8)
- An LED light bulb (1), including:a power wire support set (11) including a first power wire (111), a second power wire (112) and at least one fixed block (113), wherein the fixed block (113) fixes the first and second power wires (111, 112) to make them form a power wire supporting structure;an LED filament (12) having two ends respectively soldered to a first end (E1) of the first power wire (111) and a first end (E1) of the second power wire (112), making the LED filament (12) supported by the power wire supporting structure;a glass envelope (13) including a head part (131) having a receiving space (1311) for receiving the LED filament (12) and the fixed block (113), and a tail part (132) tapered to clamp and fix second ends (E2) of the first and second power wires (111, 112) in position; anda screw base (14) electrically connected to the second ends (E2) of the first and second power wires (111, 112).
- The LED light bulb (1) according to claim 1, wherein the LED light bulb (1) has a plurality of fixed blocks (113).
- The LED light bulb (1) according to claim 1, wherein the fixed block (113) is made of glass.
- The LED light bulb (1) according to claim 1, wherein the first and second power wires (111, 112) are dumet wires.
- The LED light bulb (1) according to claim 1, wherein the screw base (14) is soldered to the second ends (E2) of the first and second power wires (111, 112).
- A fabrication method of an LED light bulb (1), including the steps of:providing an LED filament (12) and a power wire support set (11), wherein the power wire support set (11) includes a first power wire (111), a second power wire (112) and at least one fixed block (113), and the fixed block (113) fixes the first and second power wires (111, 112) to make them form a power wire supporting structure;soldering two ends of the LED filament (12) to a first end (E1) of the first power wire (111) and a first end (E1) of the second power wire (112) respectively to form a semi-finished LED light bulb (15);providing a glass envelope (13), wherein the glass envelope (13) has a receiving space (1311) in a head part (131) thereof and a passage (1321) in a tail part (132) thereof, allowing the LED filament (12) and the fixed block (113) to pass through the passage (1321) to be received in the receiving space (1311);tapering the tail part (132) of the glass envelope (13) and sealing the passage (1321) to clamp second ends (E2) of the first and second power wires (111, 112); andproviding a screw base (14), and electrically connecting the second ends (E2) of the first and second power wires (111, 112) respectively to the screw base (14), to form a finished LED light bulb (16).
- The fabrication method according to claim 6, further including the step of: discharging redundant gas from the receiving space (1311) through the passage (1321).
- The fabrication method according to claim 6, further including the step of: removing an unnecessary portion of the tail part (132) of the glass envelope (13).
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DK16187181.9T DK3290773T3 (en) | 2016-09-05 | 2016-09-05 | LED BULBS AND METHOD OF PRODUCING THEREOF |
EP16187181.9A EP3290773B1 (en) | 2016-09-05 | 2016-09-05 | Led light bulb and fabrication method thereof |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP16187181.9A EP3290773B1 (en) | 2016-09-05 | 2016-09-05 | Led light bulb and fabrication method thereof |
Publications (2)
Publication Number | Publication Date |
---|---|
EP3290773A1 true EP3290773A1 (en) | 2018-03-07 |
EP3290773B1 EP3290773B1 (en) | 2019-05-01 |
Family
ID=56876949
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP16187181.9A Active EP3290773B1 (en) | 2016-09-05 | 2016-09-05 | Led light bulb and fabrication method thereof |
Country Status (2)
Country | Link |
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EP (1) | EP3290773B1 (en) |
DK (1) | DK3290773T3 (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP4382798A1 (en) * | 2022-12-06 | 2024-06-12 | Polyrocks Technology (Hunan) Co., Ltd. | Christmas led bulb manufacturing process |
Citations (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP2108880A2 (en) * | 2008-03-21 | 2009-10-14 | Liquidleds Lighting Corporation | LED lamp and production method of the same |
CN101968181A (en) * | 2010-09-08 | 2011-02-09 | 葛世潮 | High-efficiency LED lamp bulb |
US20120098429A1 (en) * | 2010-10-22 | 2012-04-26 | Ching-Long Liang | Led lamp with heat dissipation |
WO2013014821A1 (en) * | 2011-07-22 | 2013-01-31 | パナソニック株式会社 | Light source for lighting, and lighting device |
US20130155683A1 (en) * | 2010-11-04 | 2013-06-20 | Panasonic Corporation | Light bulb shaped lamp and lighting apparatus |
CN102980054B (en) * | 2011-09-07 | 2014-10-22 | 王丽娜 | Light-emitting diode (LED) lamp bulb |
CN203907532U (en) * | 2014-05-30 | 2014-10-29 | 惠州市华瑞光源科技有限公司 | LED filament and LED bulb with LED filament |
US20150069442A1 (en) * | 2013-09-11 | 2015-03-12 | Huga Optotech Inc. | Flexible led assemblies and led light bulbs |
-
2016
- 2016-09-05 EP EP16187181.9A patent/EP3290773B1/en active Active
- 2016-09-05 DK DK16187181.9T patent/DK3290773T3/en active
Patent Citations (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP2108880A2 (en) * | 2008-03-21 | 2009-10-14 | Liquidleds Lighting Corporation | LED lamp and production method of the same |
CN101968181A (en) * | 2010-09-08 | 2011-02-09 | 葛世潮 | High-efficiency LED lamp bulb |
US20120098429A1 (en) * | 2010-10-22 | 2012-04-26 | Ching-Long Liang | Led lamp with heat dissipation |
US20130155683A1 (en) * | 2010-11-04 | 2013-06-20 | Panasonic Corporation | Light bulb shaped lamp and lighting apparatus |
WO2013014821A1 (en) * | 2011-07-22 | 2013-01-31 | パナソニック株式会社 | Light source for lighting, and lighting device |
CN102980054B (en) * | 2011-09-07 | 2014-10-22 | 王丽娜 | Light-emitting diode (LED) lamp bulb |
US20150069442A1 (en) * | 2013-09-11 | 2015-03-12 | Huga Optotech Inc. | Flexible led assemblies and led light bulbs |
CN203907532U (en) * | 2014-05-30 | 2014-10-29 | 惠州市华瑞光源科技有限公司 | LED filament and LED bulb with LED filament |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP4382798A1 (en) * | 2022-12-06 | 2024-06-12 | Polyrocks Technology (Hunan) Co., Ltd. | Christmas led bulb manufacturing process |
Also Published As
Publication number | Publication date |
---|---|
DK3290773T3 (en) | 2019-07-29 |
EP3290773B1 (en) | 2019-05-01 |
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