EP2322843B1 - LED bulb - Google Patents

LED bulb Download PDF

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Publication number
EP2322843B1
EP2322843B1 EP10166306A EP10166306A EP2322843B1 EP 2322843 B1 EP2322843 B1 EP 2322843B1 EP 10166306 A EP10166306 A EP 10166306A EP 10166306 A EP10166306 A EP 10166306A EP 2322843 B1 EP2322843 B1 EP 2322843B1
Authority
EP
European Patent Office
Prior art keywords
core tube
led
led bulb
lamp cap
lamp housing
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.)
Not-in-force
Application number
EP10166306A
Other languages
German (de)
French (fr)
Other versions
EP2322843A1 (en
Inventor
Chun-Hsien Lee
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Individual
Original Assignee
Individual
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Individual filed Critical Individual
Priority to EP10166306A priority Critical patent/EP2322843B1/en
Publication of EP2322843A1 publication Critical patent/EP2322843A1/en
Application granted granted Critical
Publication of EP2322843B1 publication Critical patent/EP2322843B1/en
Not-in-force legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • 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
    • F21V3/00—Globes; Bowls; Cover glasses
    • 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
    • F21K9/232—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 specially adapted for generating an essentially omnidirectional light distribution, e.g. with a glass bulb
    • 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
    • F21K9/238—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
    • F21V23/003—Arrangement of electric circuit elements in or on lighting devices the elements being electronics drivers or controllers for operating the light source, e.g. for a LED array
    • F21V23/004—Arrangement of electric circuit elements in or on lighting devices the elements being electronics drivers or controllers for operating the light source, e.g. for a LED array arranged on a substrate, e.g. a printed circuit board
    • F21V23/005—Arrangement of electric circuit elements in or on lighting devices the elements being electronics drivers or controllers for operating the light source, e.g. for a LED array arranged on a substrate, e.g. a printed circuit board the substrate is supporting also 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
    • F21V23/003—Arrangement of electric circuit elements in or on lighting devices the elements being electronics drivers or controllers for operating the light source, e.g. for a LED array
    • F21V23/004—Arrangement of electric circuit elements in or on lighting devices the elements being electronics drivers or controllers for operating the light source, e.g. for a LED array arranged on a substrate, e.g. a printed circuit board
    • F21V23/006—Arrangement of electric circuit elements in or on lighting devices the elements being electronics drivers or controllers for operating the light source, e.g. for a LED array arranged on a substrate, e.g. a printed circuit board the substrate being distinct from the light source holder
    • 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
    • F21V29/00—Protecting lighting devices from thermal damage; Cooling or heating arrangements specially adapted for lighting devices or systems
    • F21V29/50—Cooling arrangements
    • F21V29/70—Cooling arrangements characterised by passive heat-dissipating elements, e.g. heat-sinks
    • F21V29/74—Cooling arrangements characterised by passive heat-dissipating elements, e.g. heat-sinks with fins or blades
    • F21V29/77—Cooling arrangements characterised by passive heat-dissipating elements, e.g. heat-sinks with fins or blades with essentially identical diverging planar fins or blades, e.g. with fan-like or star-like cross-section
    • F21V29/777—Cooling arrangements characterised by passive heat-dissipating elements, e.g. heat-sinks with fins or blades with essentially identical diverging planar fins or blades, e.g. with fan-like or star-like cross-section the planes containing the fins or blades having directions perpendicular to the light emitting axis
    • 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
    • F21Y2107/00—Light sources with three-dimensionally disposed light-generating elements
    • F21Y2107/30—Light sources with three-dimensionally disposed light-generating elements on the outer surface of cylindrical surfaces, e.g. rod-shaped supports having a circular or a polygonal cross section
    • 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]

Definitions

  • the present invention relates to a bulb structure, particularly to an LED bulb with the preferable heat dissipation.
  • Fig. 1 discloses a conventional LED bulb 1.
  • the LED bulb 1 includes a head 11, a base 12 attached to the head 11 , a shield 13 disposed above the base 12, a core tube 14 located inside the shield 13, multiple LED plates 15 disposed on the core tube 14, a core base 16 inside the base 12 connected to the core tube 14, and a circuit panel 17 electrically connected to the core base 16 .
  • the core tube 14 is formed into a hollow configuration by centralizing with respect to an axis.
  • a plurality of recesses 141 are defined for an embedment of the LED plates 15 .
  • the disposition of the core tube 14 is specialized in lighting; the hollow core tube 14 along with the core base 16 assists in radiating the ensued heat or thermal, therefore the conventional LED bulb 1 substantially obtains effects of illumination and heat dissipation.
  • the disposition of the lamp cap 12 overly occupies the space and inevitably reduces the illumination of the LED bulb 1, with the result that the illumination area of the LED plates 15 are affected.
  • the core base 16 can 1 function as a radiator
  • the core base 16 wrapped in the lamp cap 12 causes the heat scattered from the core tube 14 to be unable to dissipate. In this manner, the base 12 may not efficiently cool down if the LED bulb 1 still lasts the lighting and the production of heat and may become subject to ignition when the circuit panel 17 and the LED plates 15 are over heated under the high temperature, thus still requiring improvements.
  • the object of the present invention is to provide an LED bulb that can facilitate a convenient replacement without changing the typical appearance, attain a swift dissipation, and decrease the occurrence of ignition as a result of the over-heated LED bulb.
  • the present invention substantially prevents the ignition of the LED bulb while being subjected to a high temperature.
  • FIGs. 2 and 3 show a first preferred embodiment of the present invention.
  • An LED bulb 3 in accordance with the present invention comprises a lamp housing 31, a lamp cap 32 engaged with the lamp housing 31, a core tube 33 disposed inside the lamp housing 31, a plurality of LED plates 34 mounted on the core tube 33, and a controller 35 controlling an on-off operation of the LED plates 34; wherein, the core tube 33 defines a room 331 at a central thereof for accommodating the controller 35.
  • the core tube 33 can be formed by any feasible contours, for example, an octagonal core tube 33 is performed in the figures.
  • the core tube 33 has one end thereof connected to the lamp cap 32, thereby permitting the heat produced by the LED plates 34 to radiate through the core tube 33, the lamp cap 32, and the lamp housing 31.
  • a colloid member 36 explicitly shown in Figs. 3 and 4 is preferably arranged at a joint of the lamp housing 31 and the lamp cap 31.
  • the controller 35 inside the room 331 of the core tube 33 could preferably adapt to a bulb with a typical appearance, like the style of the LED bulb 1 in Fig. 1 and could dispose without occupying large space.
  • the controller 35 mainly serves to switch the illumination of the LED plates 34 and allows a feasible replacement if necessary, so as to increase the using convenience.
  • the electrified controller 35 activates the LED plates 34 to shine, and concurrently, since the LED plates 34 are disposed on the core tube 33 and the core tube 33 is directly connected to the lamp cap 32, the LED bulb 3 can entirely illuminate without any obstruction, namely to thoroughly perform the brightness of the LED plates 34.
  • the core tube 33 as defined connects to the lamp cap 32, which renders the lamp cap 32 able to substantially contact with the lamp housing 31. Accordingly, the heat produced by the LED plates 34 could be dispersed from the core tube 33 and traveled through the lamp cap 32 and the lamp housing 31 for expanding the radiating area, so that the LED plates 34 are kept from burning or igniting incurred by the heat made by the LED plates 34 abiding in the LED bulb 3 to cause a high-temperature condition. Therefore, the present invention preferably attains the swift heat dissipation.
  • the LED bulb 3 similarly comprises the lamp housing 31, the lamp cap 32, the core tube 33, the LED plates 34 and the controller 35.
  • the lamp housing 31 further includes a transparent portion 311 and a radiating portion 312 whose one end is connected to the transparent portion 311 and the other end is connected to the lamp cap 32.
  • a plurality of radiating ribs 37 are disposed between the radiating portion 312 and the core tube 33 at intervals. Thereby, turning on the LED plates 34 allows the generated heat to be radiated by the core tube 33 and the lamp cap 32.
  • the radiating area of the LED bulb 3 is preferably increased to promote the heat dispersing effect.
  • the present invention takes advantage of the controller disposed in the core tube, thereby saving the space, permissibly adapting to a bulb with the typical appearance, and allowing a direct replacement for increasing the convenience of using.
  • the connection of the core tube and the lamp cap further integrally performs and exposing the illumination of the LED plates without covering and leads to the heat radiating through the lamp cap and the lamp housing, thus providing a favorable dissipation and preventing the over-heated LED bulb from burning.

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Arrangement Of Elements, Cooling, Sealing, Or The Like Of Lighting Devices (AREA)
  • Non-Portable Lighting Devices Or Systems Thereof (AREA)

Description

    BACKGROUND OF THE INVENTION 1. Field of the Invention
  • The present invention relates to a bulb structure, particularly to an LED bulb with the preferable heat dissipation.
    • 2. Description of the Related Art
  • Fig. 1 discloses a conventional LED bulb 1. The LED bulb 1 includes a head 11, a base 12 attached to the head 11, a shield 13 disposed above the base 12, a core tube 14 located inside the shield 13, multiple LED plates 15 disposed on the core tube 14, a core base 16 inside the base 12 connected to the core tube 14, and a circuit panel 17 electrically connected to the core base 16. Wherein, the core tube 14 is formed into a hollow configuration by centralizing with respect to an axis. On the core tube 14, a plurality of recesses 141 are defined for an embedment of the LED plates 15. The disposition of the core tube 14 is specialized in lighting; the hollow core tube 14 along with the core base 16 assists in radiating the ensued heat or thermal, therefore the conventional LED bulb 1 substantially obtains effects of illumination and heat dissipation.
  • In operation, by virtue of the mutual engagement between the core tube 14 and the core base 16 and the location of the core base 16 set within the lamp cap 12, the disposition of the lamp cap 12 overly occupies the space and inevitably reduces the illumination of the LED bulb 1, with the result that the illumination area of the LED plates 15 are affected. Furthermore, although the core base 16 can 1 function as a radiator, the core base 16 wrapped in the lamp cap 12 causes the heat scattered from the core tube 14 to be unable to dissipate. In this manner, the base 12 may not efficiently cool down if the LED bulb 1 still lasts the lighting and the production of heat and may become subject to ignition when the circuit panel 17 and the LED plates 15 are over heated under the high temperature, thus still requiring improvements.
    • SUMMARY OF THE INVENTION
  • The object of the present invention is to provide an LED bulb that can facilitate a convenient replacement without changing the typical appearance, attain a swift dissipation, and decrease the occurrence of ignition as a result of the over-heated LED bulb.
  • According to the invention this object is achieved by a LED bulb according to claim 1.
  • In addition to the dissipation, the present invention substantially prevents the ignition of the LED bulb while being subjected to a high temperature.
    • BRIEF DESCRIPTION OF THE DRAWINGS
    • Fig. 1 is a schematic view showing a conventional invention;
    • Fig. 2 is an exploded view showing a structure of the present invention;
    • Fig. 3 is a schematic view showing the present invention in assemblage;
    • Fig. 4 is a schematic view showing the present invention in operation;
    and
    • Fig. 5 is another perspective view showing the present invention.
    DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS
  • Figs. 2 and 3 show a first preferred embodiment of the present invention. An LED bulb 3 in accordance with the present invention comprises a lamp housing 31, a lamp cap 32 engaged with the lamp housing 31, a core tube 33 disposed inside the lamp housing 31, a plurality of LED plates 34 mounted on the core tube 33, and a controller 35 controlling an on-off operation of the LED plates 34; wherein, the core tube 33 defines a room 331 at a central thereof for accommodating the controller 35. Herein, the core tube 33 can be formed by any feasible contours, for example, an octagonal core tube 33 is performed in the figures. Preferably, there are multiple ribs 332 defining on an outer periphery of the core tube 33 for engaging with and positioning the LED plates 34. Furthermore, the core tube 33 has one end thereof connected to the lamp cap 32, thereby permitting the heat produced by the LED plates 34 to radiate through the core tube 33, the lamp cap 32, and the lamp housing 31. For promoting a swift dissipating efficiency, a colloid member 36 explicitly shown in Figs. 3 and 4 is preferably arranged at a joint of the lamp housing 31 and the lamp cap 31.
  • Referring to Figs. 3 and 4 , after assembling the elements as mentioned above, the controller 35 inside the room 331 of the core tube 33 could preferably adapt to a bulb with a typical appearance, like the style of the LED bulb 1 in Fig. 1 and could dispose without occupying large space. The controller 35 mainly serves to switch the illumination of the LED plates 34 and allows a feasible replacement if necessary, so as to increase the using convenience. When in use, the electrified controller 35 activates the LED plates 34 to shine, and concurrently, since the LED plates 34 are disposed on the core tube 33 and the core tube 33 is directly connected to the lamp cap 32, the LED bulb 3 can entirely illuminate without any obstruction, namely to thoroughly perform the brightness of the LED plates 34. In addition, the core tube 33 as defined connects to the lamp cap 32, which renders the lamp cap 32 able to substantially contact with the lamp housing 31. Accordingly, the heat produced by the LED plates 34 could be dispersed from the core tube 33 and traveled through the lamp cap 32 and the lamp housing 31 for expanding the radiating area, so that the LED plates 34 are kept from burning or igniting incurred by the heat made by the LED plates 34 abiding in the LED bulb 3 to cause a high-temperature condition. Therefore, the present invention preferably attains the swift heat dissipation.
  • Referring to Fig. 5 , a second preferred embodiment of the present invention is shown. The LED bulb 3 similarly comprises the lamp housing 31, the lamp cap 32, the core tube 33, the LED plates 34 and the controller 35. Especially, the lamp housing 31 further includes a transparent portion 311 and a radiating portion 312 whose one end is connected to the transparent portion 311 and the other end is connected to the lamp cap 32. Moreover, a plurality of radiating ribs 37 are disposed between the radiating portion 312 and the core tube 33 at intervals. Thereby, turning on the LED plates 34 allows the generated heat to be radiated by the core tube 33 and the lamp cap 32. In addition to the auxiliary radiating function provided by the radiating ribs 37 and the radiating portion 312, the radiating area of the LED bulb 3 is preferably increased to promote the heat dispersing effect.
  • To sum up, the present invention takes advantage of the controller disposed in the core tube, thereby saving the space, permissibly adapting to a bulb with the typical appearance, and allowing a direct replacement for increasing the convenience of using. The connection of the core tube and the lamp cap further integrally performs and exposing the illumination of the LED plates without covering and leads to the heat radiating through the lamp cap and the lamp housing, thus providing a favorable dissipation and preventing the over-heated LED bulb from burning.
  • While we have shown and described the embodiment in accordance with the present invention, it should be clear to those skilled in the art that further embodiments may be made without departing from the scope of the present invention as claimed.

Claims (7)

  1. A LED bulb (3) comprising a lamp housing (31), a lamp cap (32) engaged with said lamp housing (31), a core tube (33) disposed inside said lamp housing (31) and providing a room (331) defined at a central thereof, a plurality of LED plates (34) mounted on said core tube (33), and a controller (35) controlling an on-off operation of said LED plates (34);
    characterized in that, said controller (35) is disposed within said room (331), and in that said core tube (33) has one end thereof connected to said lamp cap (32), so as to permit the heat produced by said LED plates (34) to radiate through said core tube (33), said lamp cap (32), and said lamp housing (31).
  2. The LED bulb as claimed in claim 1, wherein said lamp housing (31) includes a transparent portion (311) and a radiating portion (312) whose one end engages with said transparent portion (311) and the other end engages with said lamp cap (32).
  3. The LED bulb as claimed in claim 2, wherein, a plurality of radiating ribs (37) are disposed between said radiating portion (312) and said core tube (33) at intervals.
  4. The LED bulb as claimed in claim 1, wherein a colloid member is arranged at a connection of said lamp housing (31) and said lamp cap (32).
  5. The LED bulb as claimed in claim 2, wherein a colloid member is arranged at a connection of said lamp housing (31) and said lamp cap (32).
  6. The LED bulb as claimed in claim 1, wherein a plurality of ribs (332) are defined on an outer periphery of said core tube (33) for engaging with and positioning said LED plates (34).
  7. The LED bulb as claimed in claim 2, wherein a plurality of ribs (332) are defined on an outer periphery of said core tube (33) for engaging with and positioning said LED plates (34).
EP10166306A 2010-06-17 2010-06-17 LED bulb Not-in-force EP2322843B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP10166306A EP2322843B1 (en) 2010-06-17 2010-06-17 LED bulb

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP10166306A EP2322843B1 (en) 2010-06-17 2010-06-17 LED bulb

Publications (2)

Publication Number Publication Date
EP2322843A1 EP2322843A1 (en) 2011-05-18
EP2322843B1 true EP2322843B1 (en) 2012-08-22

Family

ID=43125584

Family Applications (1)

Application Number Title Priority Date Filing Date
EP10166306A Not-in-force EP2322843B1 (en) 2010-06-17 2010-06-17 LED bulb

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EP (1) EP2322843B1 (en)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101326518B1 (en) * 2011-09-02 2013-11-07 엘지이노텍 주식회사 Lighting device
KR102017538B1 (en) 2012-01-31 2019-10-21 엘지이노텍 주식회사 Lighting device
US8680755B2 (en) 2012-05-07 2014-03-25 Lg Innotek Co., Ltd. Lighting device having reflectors for indirect light emission

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6621222B1 (en) * 2002-05-29 2003-09-16 Kun-Liang Hong Power-saving lamp
US20070159828A1 (en) * 2006-01-09 2007-07-12 Ceramate Technical Co., Ltd. Vertical LED lamp with a 360-degree radiation and a high cooling efficiency
US7862204B2 (en) * 2007-10-25 2011-01-04 Pervaiz Lodhie LED light
GB2462815A (en) * 2008-08-18 2010-02-24 Sensitive Electronic Co Ltd Light emitting diode lamp
US7815333B2 (en) * 2008-09-26 2010-10-19 Fu Zhun Precision Industry (Shen Zhen) Co., Ltd. Solar LED lamp

Also Published As

Publication number Publication date
EP2322843A1 (en) 2011-05-18

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