EP2216584A1 - Ampoule de lampe omnidirectionnelle utilisant une diode électroluminescente - Google Patents

Ampoule de lampe omnidirectionnelle utilisant une diode électroluminescente Download PDF

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Publication number
EP2216584A1
EP2216584A1 EP09174624A EP09174624A EP2216584A1 EP 2216584 A1 EP2216584 A1 EP 2216584A1 EP 09174624 A EP09174624 A EP 09174624A EP 09174624 A EP09174624 A EP 09174624A EP 2216584 A1 EP2216584 A1 EP 2216584A1
Authority
EP
European Patent Office
Prior art keywords
circuit boards
light bulb
circular end
along
leds
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.)
Withdrawn
Application number
EP09174624A
Other languages
German (de)
English (en)
Inventor
Der-Ming Juang
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
Publication of EP2216584A1 publication Critical patent/EP2216584A1/fr
Withdrawn legal-status Critical Current

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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
    • F21V19/00—Fastening of light sources or lamp holders
    • F21V19/001—Fastening of light sources or lamp holders the light sources being semiconductors devices, e.g. LEDs
    • F21V19/003—Fastening of light source holders, e.g. of circuit boards or substrates holding light sources
    • 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
    • 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
    • F21V3/02—Globes; Bowls; Cover glasses characterised by the shape
    • 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
    • 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 generally relates to light bulbs, and more particularly to a light bulb using light emitting diodes as light source and projecting light in substantially all directions.
  • LEDs Light emitting diodes
  • the light emanated by a LED is usually restricted in a limited range and, as such, most of the applications utilizing LEDs are projection-based, such as flashlights, vehicle lamps, streetlamps, etc.
  • the incandescent light bulbs commonly found in households produce omnidirectional light from heated filaments. Therefore, if the LEDs are to replace incandescent light bulbs in household applications, the problem of limited coverage has to be addressed.
  • a novel light bulb using LEDs as light source capable of producing substantially omnidirectional light is provided herein.
  • the light bulb contains a transparent body member and a contact member at an end of the body member that could be screwed into a conventional light bulb socket for establishing electrical connections.
  • the light bulb also contains a number of flat circuit boards having a circular end and a rectangular body whose width is smaller than the diameter of the circular end. Two or more LEDs are arranged at appropriate space along the circumference of a side of the circular end and the light from these LEDs are projected towards centrifugal directions.
  • the circuit boards are joined to intersect each other along a vertical direction so that, when viewed from the circular end towards the rectangular body, the circuit boards from a cross shape, a star shape, or a similar, radiating-from-a-center shape.
  • FIG. 1a is a side-view diagram showing an omnidirectional light bulb according a first embodiment of the present invention.
  • FIG. 1b is a top-view diagram showing the omnidirectional light bulb of FIG. 1a .
  • FIG. 1c is a schematic diagram showing the circuit boards of the omnidirectional light bulb of FIG. 1a .
  • FIG. 2a is a top-view diagram showing an omnidirectional light bulb according a second embodiment of the present invention.
  • FIG. 2b is a schematic diagram showing the circuit boards of the omnidirectional light bulb of FIG. 2a .
  • an omnidirectional light bulb mainly contains a transparent body member 10.
  • the body member 10 could be hollow or solid and could have the usual spherical shape of ordinary light bulbs or other appropriate shape.
  • a contact member 20 with threads 21 for screwing into an ordinary light bulb socket (not shown).
  • the contact member 20 like all ordinary light bulbs, has two electrical contact points, one being the threads 21 and the other one at a bottom end of the contact member 20 (also not shown), so as to establish electrical connections with the light bulb socket.
  • the light bulb further contains a number of circuit boards inside the body member 10.
  • Each circuit board is flat, and has a circular end and a rectangular body. The width of the rectangular body is smaller than the diameter of the circular end.
  • a number of LEDs 30 are positioned along the circumference on a side of the circular end at appropriate spacing therebetween. These LEDs 30 are configured so that their light is projected towards various centrifugal directions away from the center of the circular end, respectively.
  • the two circuit boards 40 and 41 join and intersect each other along a vertical direction with a 90-degree included angle. Therefore, if looking down on the combination of the circuit boards 40 and 41 from their circular ends, a cross shape is formed by the circular boards 40 and 41.
  • the LEDs 30 of the present embodiment should jointly constitute a substantially omnidirectional light coverage, therefore resolving the limited coverage problem of the prior art.
  • the light bulb should have stronger brightness and a light coverage approaching true omnidirection.
  • the LEDs 30 on separate circuit boards 40 and 41 could be arranged in an interleaving manner.
  • two neighboring LEDs 30 from the circuit boards 40 and 41 are not at the same height, so as to avoid their light from overlapping.
  • the circuit board 40 has an elongated and vertical slot 400 whose one end borders on a bottom rim of its rectangular body.
  • the circuit board 41 has another elongated and vertical slot 410 whose one end borders on a top rim of its circular end.
  • the slots 400 and 410 have matched lengths and the sum of their lengths equals to the height of the circuit boards 40 and 41. Therefore, by aligning and plugging the slots 400 and 410 together, the circuit boards 40 and 41 would form the intersecting configuration as shown in FIGS. 1a and 1b ,
  • circuit boards 40 and 41 could be achieved in various ways.
  • a cross-shaped socket is provided on the contact member 20 and the intersecting circuit boards 40 and 41 could be directly plugged into the cross-shaped socket.
  • the circuit boards 40 and 41 should have circuits for driving the LEDs 30 (but they are omitted in the drawings for simplicity) and these circuits should have electrical contact points (as denoted by the '+' and '-' signs in the drawing) for receiving electricity.
  • FIGS. 2a and 2b show a second embodiment of the present invention. For simplicity, those parts identical to the first embodiment are omitted such as the LEDs 30 and the '+' and '-' contact points.
  • the present embodiment has four circuit boards 50, 51, 60, and 61. They join and intersect with each other along a vertical direction with 45-degree included angles between neighboring boards. Therefore, when viewed from the circular ends of the circuit boards 50, 51, 60, and 61, a star shape from the top-view perspective is formed.
  • the circuit boards 50, 51, 60, and 61 are shown in FIG. 2b , each having an elongated slot for their intersection. With these slots, the slot on the rectangular body of the circuit board 50 could be plugged into the slot at the circular end of the circuit board 51. The slots on the rectangular bodies of the circuit boards 50 and 51 are then plugged into the slot at the circular end of the circuit board 60. Finally, the slots on the rectangular bodies of the circuit boards 50, 51, and 60 are then plugged into the slot at the circular end of the circuit board 61. The result is therefore the star shape as shown in FIGS. 2a and 2b .
  • circuit boards there could be embodiments incorporating six, eight, or even more circuit boards. It is also possible to intersect three, five, seven, or larger odd-numbered circuit boards to a form a radiating-from-a-center shape from the top-view perspective. As there are more circuit boards, for a plane perpendicular to the circuit boards, there will be more LEDs 30 to cover the 360-degree range of the plane. The light bulb therefore would have more complete lateral light coverage and, as such, approach the true omnidirection.

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Optics & Photonics (AREA)
  • Fastening Of Light Sources Or Lamp Holders (AREA)
  • Non-Portable Lighting Devices Or Systems Thereof (AREA)
  • Arrangement Of Elements, Cooling, Sealing, Or The Like Of Lighting Devices (AREA)
EP09174624A 2009-02-05 2009-10-30 Ampoule de lampe omnidirectionnelle utilisant une diode électroluminescente Withdrawn EP2216584A1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
TW098201695U TWM363550U (en) 2009-02-05 2009-02-05 Omnidirectional light bulb using light emitting diode

Publications (1)

Publication Number Publication Date
EP2216584A1 true EP2216584A1 (fr) 2010-08-11

Family

ID=41531686

Family Applications (1)

Application Number Title Priority Date Filing Date
EP09174624A Withdrawn EP2216584A1 (fr) 2009-02-05 2009-10-30 Ampoule de lampe omnidirectionnelle utilisant une diode électroluminescente

Country Status (2)

Country Link
EP (1) EP2216584A1 (fr)
TW (1) TWM363550U (fr)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
TW201128129A (en) * 2010-02-11 2011-08-16 shi-kai Lin LED bulb
TWI457515B (zh) * 2011-02-14 2014-10-21 Taiwan Semiconductor Mfg 發光燈具

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19624087A1 (de) * 1996-06-17 1997-12-18 Wendelin Pimpl Beleuchtungsvorrichtung
US20030031015A1 (en) * 2001-08-13 2003-02-13 Atex Co. Ltd. LED bulb
US20080174224A1 (en) 2007-01-24 2008-07-24 Unity Opto Technology Co., Ltd. Lamp head structure

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19624087A1 (de) * 1996-06-17 1997-12-18 Wendelin Pimpl Beleuchtungsvorrichtung
US20030031015A1 (en) * 2001-08-13 2003-02-13 Atex Co. Ltd. LED bulb
US20080174224A1 (en) 2007-01-24 2008-07-24 Unity Opto Technology Co., Ltd. Lamp head structure

Also Published As

Publication number Publication date
TWM363550U (en) 2009-08-21

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