WO2010043100A1 - Lampe d’éclairage à del grand angle présentant une efficacité élevée de dissipation thermique et un éclairage uniforme - Google Patents

Lampe d’éclairage à del grand angle présentant une efficacité élevée de dissipation thermique et un éclairage uniforme Download PDF

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Publication number
WO2010043100A1
WO2010043100A1 PCT/CN2009/000827 CN2009000827W WO2010043100A1 WO 2010043100 A1 WO2010043100 A1 WO 2010043100A1 CN 2009000827 W CN2009000827 W CN 2009000827W WO 2010043100 A1 WO2010043100 A1 WO 2010043100A1
Authority
WO
WIPO (PCT)
Prior art keywords
led lamp
inclined planes
led
substrate
inclination angles
Prior art date
Application number
PCT/CN2009/000827
Other languages
English (en)
Inventor
Yung Pun Cheng
Original Assignee
Yung Pun Cheng
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
Priority claimed from CNU2008201382516U external-priority patent/CN201293279Y/zh
Application filed by Yung Pun Cheng filed Critical Yung Pun Cheng
Publication of WO2010043100A1 publication Critical patent/WO2010043100A1/fr

Links

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
    • 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
    • F21V29/83—Cooling arrangements characterised by passive heat-dissipating elements, e.g. heat-sinks the elements having apertures, ducts or channels, e.g. heat radiation holes
    • 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
    • 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
    • F21V19/005—Fastening of light source holders, e.g. of circuit boards or substrates holding light sources by permanent fixing means, e.g. gluing, riveting or embedding in a potting compound
    • 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
    • F21V29/502—Cooling arrangements characterised by the adaptation for cooling of specific components
    • F21V29/507—Cooling arrangements characterised by the adaptation for cooling of specific components of means for protecting lighting devices from damage, e.g. housings
    • 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
    • F21Y2107/00—Light sources with three-dimensionally disposed light-generating elements
    • F21Y2107/40—Light sources with three-dimensionally disposed light-generating elements on the sides of polyhedrons, e.g. cubes or pyramids
    • 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-emitting diode (LED) lamps. More specifically, the present invention relates to LED lamps with high heat- dissipation efficiency, wide illumination beam angles, and substantially uniform illumination intensity.
  • LED light-emitting diode
  • LED lamps With recent developments in LED technologies, high-powered LED lamps are more frequently designed for use in household lighting applications. Compared with light sources currently used in homes, such as incandescent lights, LED lamps provide advantages such as ample brightness, energy savings, high reliability, and long life span.
  • Current commercially available LED lamps involve a plurality of packaged LEDs arranged in an array on a plane. Although this type of LED lamp may meet common lighting needs, the LED lighting elements are distributed on the same plane and, thus, the light being radiated from the LED lamp is highly directional and has a relatively narrow beam angle. In addition, this type of LED lamp lacks a good heat- dissipation structure which limits the life span due to the LEDs overheating. The heat dissipation issue can be solved by installing a radiator on the back of the base plane. For high-powered LED lighting elements, however, the packaging, including the adhesive base and the glass bubble, still interferes with effective heat dissipation.
  • This disclosure pertains to LED lamps, and in particular to LED lamps having a substrate with a plurality of inclined planes.
  • the LED lamps provide adequate heat-dissipation efficiency, wide illumination beam angles, and substantially uniform illumination intensity.
  • the LED lamp includes a substrate bearing LED lighting elements and a heat sink connected with the substrate.
  • the LED lighting elements are distributed on at least one inclined plane of the substrate.
  • Figure 1 is a drawing illustrating a side view of an LED lamp, in accordance with the present disclosure
  • Figure 2 is a perspective view of an LED, in accordance with the present disclosure.
  • Figure 3 is a schematic diagram illustrating internal circuit connections of an LED lamp, in accordance with the present disclosure.
  • Figure 4 is a drawing illustrating the top-down view of an LED lamp, in accordance with the present disclosure
  • Figure 5 is a drawing illustrating the cross-sectional view of an LED lamp, in accordance with the present disclosure
  • Figure 6 is a drawing illustrating the top-down view of an LED lamp, in accordance with the present disclosure.
  • Figure 7 is a drawing illustrating the cross-sectional view of an LED lamp, in accordance with the present disclosure.
  • Known LED lamps lack good heat-dissipation efficiency in conjunction with wide illumination beam angles and uniform illumination intensity.
  • a plurality of LEDs may be arranged in an array on a plane, as disclosed in Chinese Pat. App. No. 01103850.0 (Pub. No. 1372096), entitled “LED Illumination Lamp” to T. Wang.
  • a plurality of LEDs are installed with a sealing adhesive on planar base plates of an LED lamp housing and printed circuit boards are installed between the housing and lamp cap.
  • This arrangement lacks adequate heat-dissipation limiting the lamp's life-span. This arrangement also suffers from inadequate breadth of illumination angles.
  • a plurality of LEDs may be used in conjunction with an LED carrier, as disclosed in Chinese Pat. App. No. 200710044917.1 (Pub. No. 101182916), entitled “LED Lamps" to X. Zhan.
  • Zhan discloses an LED carrier with multiple LED bearing planes - one of which is planar and another of which is inclined. LEDs are then distributed on the planes in a circle, at angularly equidistant points, which expands the beam angles but, due to the discontinuity between the inclined planes and the LEDs on the inclined planes being on a spherical surface, the illumination intensity is still non-uniform.
  • disclosed embodiments seek to maximize heat-dissipation efficiency while providing wide illumination beam angles and uniform illumination intensity.
  • Figure 1 is a drawing illustrating a side view of a first embodiment of an
  • a lamp holder 101 is connected to an alternating current power source to supply power to the LED lamp 100.
  • the lamp holder 101 may be of the same specification as common lighting lamps, making it easier to substitute an LED lamp in for fluorescent bulbs currently used for lighting.
  • the substrate 102 may be a cast-formed metal module.
  • Inclined planes 105 and 105' are surfaces of the substrate and may be formed through mechanical machining technology. Inclined planes 105 and 105' may be formed by cutting different inclination angles relative to a plane perpendicular to the central axis of the LED lamp 100.
  • the inclined planes 105 and 105' may also be coated, e.g., by electroplating, to increase reflectivity of the substrate.
  • the LED lighting elements 106 may be placed at the junctions or edges of the inclined planes.
  • the LED lighting elements 106 may be phosphor and bare, i.e. without the adhesive base, heat-dissipating substrate, pins, or a glass fixture.
  • LED lighting elements 106 may be attached using heat conducting adhesive. Using bare LED lighting elements 106 improves heat dissipation. Placing LED lighting elements 106 at the junction or edges of the inclined planes increases the range of light angles emitted by the lighting elements via reflection off the inclined planes 105, 105' at the junctions. LED lighting elements 106 may also be placed elsewhere on the inclined planes. Depending on the requirements of illumination, the number of LED lighting elements
  • each plane 105, 105' may be adjusted accordingly.
  • the number of LED lighting elements 106 on each plane 105, 105' may be zero, one, or more than one.
  • the heat sink 103 and the substrate 102 can be formed as one part, or can be formed separately and subsequently assembled.
  • the outside of the heat sink 103 may comprise a considerable number of highly-efficient fin-shaped radiating structures to increase the contact area with air.
  • the heat from the LED lighting elements 106 is transferred directly by conduction and dissipated through the fin-shaped radiation structures of the heat sink 103, resulting in higher heat dissipation efficiency.
  • the 107 may be positioned at the central axis of the substrate 102.
  • the reflector 107 may be a round shape.
  • the reflector 107 may also be square-shaped or any other shape.
  • Figure 2 is a perspective view of the LED lamp 100.
  • the inclined planes are a perspective view of the LED lamp 100.
  • the inclined planes 105 and 105' are radially distributed around a central axis and form two levels with varying inclination angles, depending on the radial direction.
  • the inclined planes may also be distributed symmetrically.
  • the inclined planes in the same radial direction gradually incline downward from the center to the periphery.
  • the inclined planes of the first level i.e. those that are adjacent to the reflector 107, collectively form a shape resembling a prism frustum.
  • the prism frustum may have any number of sides from three to eight, or more.
  • the inclined planes of the second level around the periphery form an alternating distributed structure.
  • inclination angles of the inclined planes on the substrate 102 is preferably within the range of 10° to 80° relative to a plane perpendicular to the central axis of the LED lamp.
  • the inclination angles of the adjacent inclined planes at the second level may be set as 10° and 80°, 20° and 70°, or 15° and 60°, etcetera, from a plane perpendicular to the central axis.
  • LED lighting elements 106 are connected to two power wire interfaces
  • FIG. 3 is a schematic diagram illustrating the internal circuit connection of the LED lamp 100.
  • a direct current (DC) circuit board 104 may be installed in the internal cavity of the LED lamp 100.
  • the DC circuit board 104 may be a printed circuit board including an alternating current to direct current converter. Such AC to DC converters are well known in the field.
  • the DC circuit board 104 also includes a current- control part (not shown in Figure 3) for each LED lighting element.
  • the input terminal of the converter 104 connects with the lamp base by a conducting wire 108 in order to receive an input AC current.
  • the output terminal of the converter 104 provides DC current to LED lighting elements 106 through a DC wire 111 and through the power wire interfaces 109 and the bonding wires 110.
  • Two DC wires 111 connect with the power wire interface, one with a positive electrode and one with a negative electrode, although the figure only shows one DC wire 111.
  • Figure 4 is a drawing illustrating the top-down view of an embodiment of the LED lamp 100 and Figure 5 is a drawing illustrating a cross-sectional view along the line 5-5 of Figure 4.
  • the LED lighting elements on the inclined planes 105 and 105' are located on circles of different radii, i.e. the distance between the LED lighting elements on inclined plane 105' and the central axis is greater than the distance between LED lighting elements on inclined plane 105 and the central axis.
  • the angle between the incident ray i' from 105' and the surface of the reflector 107 is greater than the angle between the incident ray i from 105 and the surface of the reflector 107, as shown in Figure 5. Accordingly the reflection ray R' has a longer distance to travel from the central axis than does the reflection ray R. In this embodiment, relative to the central axis, the light emitted from the LED lighting elements 106 of inclined plane 105' will be incident from a wider light angle than the light emitted from the LED lighting elements 106 of inclined plane 105.
  • FIG. 6 is a drawing illustrating the top-down view of another embodiment of an LED lamp 600 and Figure 7 is a drawing illustrating the cross- sectional view along the line 7-7 in Figure 6.
  • This embodiment of an LED lamp does not have a reflector at the central axis. Instead, a plane is located at the center.
  • the substrate has inclined planes 651, 652, 653, and 651', 652', 653' of more levels ( Figure 6 shows three levels, but more levels may be used). At least one lighting element 106 is placed on each inclined plane of each level. The lighting element may be at the junction or in the middle of the inclined planes (including the central plane). Inclination angles a, b, and c of the inclined planes 651, 652, and 653 in one radial direction, and inclination angles a', b', and c' of the inclined planes 651', 652', and 653' in a second radial direction are shown in Figure 7. These angles may all be different, but they should still be within the range of 10° to 80° from the horizontal plane.

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Optics & Photonics (AREA)
  • Non-Portable Lighting Devices Or Systems Thereof (AREA)

Abstract

La présente invention concerne une lampe d’éclairage à DEL. La lampe comprend un substrat doté d'une pluralité de plans inclinés, un dissipateur thermique formé conjointement avec le substrat en une seule pièce, et au moins un élément d’éclairage à DEL situé sur au moins un des plans inclinés.
PCT/CN2009/000827 2008-10-16 2009-07-24 Lampe d’éclairage à del grand angle présentant une efficacité élevée de dissipation thermique et un éclairage uniforme WO2010043100A1 (fr)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
CNU2008201382516U CN201293279Y (zh) 2008-10-16 2008-10-16 Led照明灯
CN200820138251.6 2008-10-16
US12/407,562 2009-03-19
US12/407,562 US7936119B2 (en) 2008-10-16 2009-03-19 Wide-angle LED lighting lamp with high heat-dissipation efficiency and uniform illumination

Publications (1)

Publication Number Publication Date
WO2010043100A1 true WO2010043100A1 (fr) 2010-04-22

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PCT/CN2009/000827 WO2010043100A1 (fr) 2008-10-16 2009-07-24 Lampe d’éclairage à del grand angle présentant une efficacité élevée de dissipation thermique et un éclairage uniforme

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WO (1) WO2010043100A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2916066A1 (fr) * 2014-03-07 2015-09-09 Daniel Muessli Dispositifs à diode électroluminescente (DEL) avec une distribution de lumière améliorée et une distribution de chaleur optimisée

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2001052503A (ja) * 1999-08-16 2001-02-23 San Kiden:Kk 多光源ランプ
CN2462230Y (zh) * 2000-12-28 2001-11-28 张文虎 多用途发光二极管环射信号灯
CN2637885Y (zh) * 2003-02-20 2004-09-01 高勇 发光面为曲面的led灯泡
US20060007690A1 (en) * 2004-07-07 2006-01-12 Tsian-Lin Cheng LED lamp
CN1834534A (zh) * 2006-04-14 2006-09-20 东南大学 一体化阵列式大功率发光二极管照明灯
JP2008004415A (ja) * 2006-06-23 2008-01-10 Ccs Inc 立体光源体

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2001052503A (ja) * 1999-08-16 2001-02-23 San Kiden:Kk 多光源ランプ
CN2462230Y (zh) * 2000-12-28 2001-11-28 张文虎 多用途发光二极管环射信号灯
CN2637885Y (zh) * 2003-02-20 2004-09-01 高勇 发光面为曲面的led灯泡
US20060007690A1 (en) * 2004-07-07 2006-01-12 Tsian-Lin Cheng LED lamp
CN1834534A (zh) * 2006-04-14 2006-09-20 东南大学 一体化阵列式大功率发光二极管照明灯
JP2008004415A (ja) * 2006-06-23 2008-01-10 Ccs Inc 立体光源体

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2916066A1 (fr) * 2014-03-07 2015-09-09 Daniel Muessli Dispositifs à diode électroluminescente (DEL) avec une distribution de lumière améliorée et une distribution de chaleur optimisée
WO2015132414A1 (fr) * 2014-03-07 2015-09-11 Daniel Muessli Dispositifs à diode électroluminescente (led) ayant une distribution de lumière améliorée et une distribution de chaleur optimisée

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