JP2005276467A - Electric bulb type led light source - Google Patents

Electric bulb type led light source Download PDF

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Publication number
JP2005276467A
JP2005276467A JP2004084347A JP2004084347A JP2005276467A JP 2005276467 A JP2005276467 A JP 2005276467A JP 2004084347 A JP2004084347 A JP 2004084347A JP 2004084347 A JP2004084347 A JP 2004084347A JP 2005276467 A JP2005276467 A JP 2005276467A
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JP
Japan
Prior art keywords
bulb
led
light source
housing
light
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.)
Pending
Application number
JP2004084347A
Other languages
Japanese (ja)
Inventor
清 ▲たか▼橋
Masanori Shimizu
Kiyoshi Takahashi
Tadashi Yano
正則 清水
正 矢野
Original Assignee
Matsushita Electric Ind Co Ltd
松下電器産業株式会社
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 Matsushita Electric Ind Co Ltd, 松下電器産業株式会社 filed Critical Matsushita Electric Ind Co Ltd
Priority to JP2004084347A priority Critical patent/JP2005276467A/en
Publication of JP2005276467A publication Critical patent/JP2005276467A/en
Pending legal-status Critical Current

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    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21LIGHTING
    • F21KNON-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
    • F21K9/00Light sources using semiconductor devices as light-generating elements, e.g. using light-emitting diodes [LED] or lasers
    • F21K9/60Optical arrangements integrated in the light source, e.g. for improving the colour rendering index or the light extraction
    • F21K9/65Optical arrangements integrated in the light source, e.g. for improving the colour rendering index or the light extraction specially adapted for changing the characteristics or the distribution of the light, e.g. by adjustment of parts
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21LIGHTING
    • F21KNON-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
    • F21K9/00Light sources using semiconductor devices as light-generating elements, e.g. using light-emitting diodes [LED] or lasers
    • F21K9/20Light sources comprising attachment means
    • F21K9/23Retrofit 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
    • F21K9/232Retrofit 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
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21LIGHTING
    • F21KNON-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
    • F21K9/00Light sources using semiconductor devices as light-generating elements, e.g. using light-emitting diodes [LED] or lasers
    • F21K9/20Light sources comprising attachment means
    • F21K9/23Retrofit 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
    • F21K9/233Retrofit 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 a spot light distribution, e.g. for substitution of reflector lamps
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21LIGHTING
    • F21VFUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
    • F21V29/00Protecting lighting devices from thermal damage; Cooling or heating arrangements specially adapted for lighting devices or systems
    • F21V29/50Cooling arrangements
    • F21V29/70Cooling arrangements characterised by passive heat-dissipating elements, e.g. heat-sinks
    • F21V29/74Cooling arrangements characterised by passive heat-dissipating elements, e.g. heat-sinks with fins or blades
    • F21V29/77Cooling 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
    • F21V29/773Cooling 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 the direction of the light emitting axis
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21LIGHTING
    • F21YINDEXING 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
    • F21Y2115/00Light-generating elements of semiconductor light sources
    • F21Y2115/10Light-emitting diodes [LED]

Abstract

<P>PROBLEM TO BE SOLVED: To provide an electric bulb type LED light source capable of matching the beam direction of light distribution of a luminaire with the beam direction of light distribution of the electric bulb type LED light source in an actual use state in which the electric bulb type LED light source is set to the luminaire. <P>SOLUTION: The electric bulb type LED light source has a mechanism in which it makes housing 104 for holding an LED and a housing 103 for holding a bulb rotate in the rotational axis θ direction on the insertion direction of the bulb base 101 when the optical axis center of light distribution beams of an LED is almost 90° to the insertion direction of the bulb base. By this constitution, even if the optical axis of the light distribution of the electric bulb type LED light source is directed in the direction of a reflecting plate of the luminaire, by rotating the LED holding housing 104, the light distribution beams direction of the luminaire can be matched with the light distribution beams of the electric bulb type LED light source. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to an LED bulb-type light source.
  As a conventional bulb-type LED light source, there is one in which LEDs are arranged in a plane on a screw-based bulb base (Patent Document 1). FIG. 2 shows a conventional bulb-type LED described in Patent Document 1. As shown in FIG.
Moreover, as a conventional light bulb-type LED light source, there is one in which LEDs are three-dimensionally arranged on a light bulb base (Patent Document 2). FIG. 3 shows a conventional light bulb shaped LED described in Patent Document 2. As shown in FIG.
Registered Utility Model No. 3034744 (FIG. 1) JP-A-9-265807 (FIG. 1)
  2 and 3, the bulb-type LED light source is connected to the insertion direction axis where the bulb-type LED is connected to the bulb cap (prefocus base other than the screw base cap, the pin cap, etc.). The center of the optical axis of the light distribution is the same, or the light distribution is wide in the entire circumferential direction with respect to the rotation direction θ of the insertion direction axis.
  On the other hand, the problem in applying the bulb-type LED light source having the light distribution as described above to illumination is shown in the conceptual diagram of the conventional problem in FIG.
  In the figure, 402 is a conventional bulb-type LED light source, 401 is an LED on which a bulb-type LED light source is mounted, 403 is a screw-based bulb base on which the bulb-type LED light source is installed, and 404 is a bulb-type LED light source. 405 is a reflector of the lighting fixture, and 406 is a lighting fixture opening in the light emitting direction of the lighting fixture.
  If the lighting fixture employs a screw base as shown in FIG. 4, the center of the optical axis of the bulb-shaped LED light source at the time of use when it is finally fixed when the bulb-shaped LED light source is connected and installed. Will be in a state where the orientation of the screw is not fixed (the fixing angle varies depending on the fitting condition of the screw base bulb cap).
  In the LED light source in which the center of the optical axis of the LED is 90 degrees with respect to the insertion direction of the bulb base 403, the bulb base 403 is in relation to the rotation direction θ of the insertion direction axis of the bulb-type LED light source such as a pin base. If a base that unambiguously determines the orientation of the light source is adopted, the direction of the optical axis of the light distribution of the bulb-shaped LED light source may be directed to the reflector direction of the lighting fixture, etc. Garage.
  The present invention has been made in order to solve the above-described problems. The object of the present invention is to provide a light distribution beam direction of a lighting fixture and a light bulb-shaped LED light source in an actual use state where the bulb-type LED light source is installed in the lighting fixture. An object of the present invention is to provide a bulb-type LED light source that can match the beam direction of light distribution.
  In order to solve the above-described conventional problems, a bulb-type LED light source according to the present invention holds an LED, a bulb base for supplying power to the LED, a housing that holds the LED, and the bulb base. A light bulb-shaped LED light source having a housing, wherein an optical axis center of a light distribution beam of the LED is approximately 90 degrees with respect to a direction in which the light bulb base is inserted, and a portion for holding the LED; And a mechanism for rotating the portion holding the bulb base with respect to a rotation axis θ direction with the insertion direction of the bulb base as an axis.
  In a preferred embodiment, a majority of the total luminous flux is concentrated within plus or minus 90 degrees around the center of the beam optical axis.
  As a preferred embodiment, a housing for holding the LED includes a heat dissipation unit.
  As described above, the bulb-type LED light source according to the present invention includes a housing for holding an LED and a bulb when the center of the light distribution beam optical axis of the LED is approximately 90 degrees with respect to the insertion direction of the bulb cap. A mechanism for rotating the housing holding the base with respect to the rotation axis θ direction with the insertion direction of the bulb base as an axis is provided. With this configuration, even when the direction of the optical axis of the light distribution of the bulb-shaped LED light source is directed toward the reflector plate of the lighting fixture in actual use, the housing that holds the LED can be rotated. The light distribution beam direction of the lighting fixture can be matched with the light distribution beam direction of the bulb-shaped LED light source.
  Embodiments of the present invention will be described below with reference to the drawings.
(Embodiment 1)
FIG. 1 shows a light bulb-type LED light source according to a first embodiment of the present invention.
  In FIG. 1, 101 is a light bulb base, 102 is an LED, 103 is a housing that holds a light bulb base, 104 is a housing that holds an LED, and 105 is a shaft into which the light bulb base 101 is inserted into the housing 103 and the housing 104. Is a rotation mechanism that rotates with respect to the rotation axis θ direction. Here, the “bulb base” refers to a base including a screw base type and a swan base type (bi-pin type).
  More specifically, in the present embodiment, the center of the light distribution beam optical axis of the LED 102 is mounted in a direction that forms approximately 90 degrees with respect to the insertion direction axis of the bulb base 101, and the center of the light distribution of the LED is the light bulb center. It is approximately 90 degrees with respect to the insertion direction of the base 101, and the optical axis direction of the bulb-shaped LED light source and the optical axis direction of the LED 102 are substantially coincident. Further, the majority of the total luminous flux is concentrated within plus or minus 90 degrees with the center of the beam optical axis as the center.
  By a rotating mechanism 105 interposed between a housing part 103 having a light bulb base 101 and a housing part 104 having an LED light emitting part, the housing part 103 having a light bulb base 101 and a housing part 104 having an LED light emitting part. Can be rotated with respect to the direction of the rotation axis θ with respect to the insertion axis direction of the base. With this configuration, when the bulb-type LED light source is connected to the lighting fixture with the bulb cap 101, the directionality of the center of the optical axis of the LED 102 at the time of use that is finally fixed can be set in the direction of the rotation axis θ. A light bulb shaped LED light source can be provided.
  Here, the housing 103 having the light bulb base has a built-in lighting circuit for lighting the LED 102, and is practically made of resin (PBT resin) from the relationship between electrical insulation and heat dissipation.
  It is practical that the housing unit 104 including the LED light emitting unit is a metal (aluminum) in order to dissipate heat from the LED die more efficiently than the resin material.
  Moreover, in this embodiment, the housing | casing part 104 provided with a LED light emission part has a heat sink as a thermal radiation means. A notch-like heat radiation fin on the opposite side of the LED 102 in FIG. 1 serves as a heat sink. In this case, when the optical axis direction of the LED is directed to the instrument opening, the heat sink part always faces the instrument inner surface, and the direction is constant. Since the direction is constant, for example, assuming a downlight-type lighting fixture, assuming that the direction of air heat dissipation of the heat sink is directed upward in the opposite direction with respect to the LED that is the heat generation source and the light emitting unit, the heat sink The design of the direction of air convection in the part is facilitated based on optimum heat dissipation.
  On the contrary, it is also possible to install a heat radiating member for radiating heat which is difficult to set in the rotating portion in the housing portion 103 having a light bulb base which is a fixed portion. As an example, it is possible to incorporate a heat sink, heat pipe, fan, etc. At this time, since it is not necessary to rotate complicated members other than the LED that is the light emitting unit, the structure is simplified and the mechanical reliability is improved.
  Of course, these heat radiating members can also be placed in the casing 104 provided with the LED light emitting part for the optimum heat radiating design that defines the direction of air convection.
  FIG. 5 is a detailed example of the rotation mechanism. FIG. 4 is a cross-sectional view in the rotational direction of a mechanism that rotates a housing 503 that holds a light bulb base 101 and a housing 504 that holds an LED with respect to the rotational axis θ direction of the light bulb base 101.
  A pin 501 is set on the housing 504 having an LED light emitting portion at a fitting portion between the housing 504 and the housing 503, and a stopper 502 mechanism for restricting the number of rotations and the angle of the pin is incorporated in the housing 503. Yes.
  In addition, a space between the housing 504 and the housing 503 in FIG. 5 is a space portion through which wiring for supplying power from the housing 503 to the housing 504 having the LED light emitting portion is passed.
  The reason for the presence of the rotation stopper mechanism in the housing 504 and the housing 503 is that it is necessary to pass a wire that feeds power from the housing 503 to the housing 504 having the LED light-emitting portion through the space. This is because twisting of the wiring occurs. Considering the twist of the wiring, the rotation is not more than one rotation, preferably within 90 degrees. In FIG. 5, the rotation is stopped by the stopper at 90 degrees.
  If the power supply wiring is separated by using the inductive power supply or the spring contact at the rotating mechanism portion, the worries about the wiring twist can be overcome, but the number of members increases and the cost increases. Furthermore, when the screw base of the bulb-type LED light source is screwed into the lighting device for installation or removal, the LED light source section rotates, making screwing and removal difficult.
  Further, in improving the operability of inserting and removing the bulb-shaped LED light source, the rotating portion of the LED light emitting portion is further limited to be smaller than the LED light emitting portion, and the non-rotating portion is increased on the surface of the housing (see FIG. 5 Thus, it is more preferable to provide a lock mechanism that facilitates the attachment / detachment of the LED light source unit to / from the luminaire, or that allows the rotation to be locked and released.
  As described above, the light distribution pattern can be easily adjusted after the bulb-shaped LED light source is installed in the instrument in the working environment.
  Next, a more detailed description will be added to the case where the bulb-type LED light source has no rotation mechanism.
  FIG. 6 is a conceptual diagram of the operation of the light bulb shaped LED when there is no rotation mechanism.
  6, 601 is an LED, 602 is a light bulb-shaped LED light source in which the center of the light axis of the light bulb-shaped LED is fixed at about 90 degrees with respect to the direction in which the light bulb is inserted, 603 is a light bulb base whose lamp direction can be defined, Reference numeral 604 denotes a lighting fixture, 605 denotes a lighting fixture reflector, and 606 denotes a lighting fixture opening.
  A light bulb-shaped LED light source in which the center of the light axis of the light bulb-shaped LED is fixed at about 90 degrees with respect to the base insertion direction 602 is inserted into a light bulb base 603 (for example, a bi-pin base) capable of defining the lamp direction. Assume a case.
  As in the case of the left figure of FIG. 6, if the direction of receiving the cap pins of the light bulb base 603 of the light fixture 604 happens to be in a suitable direction, the light fixture opening that is the light emitting direction of the light fixture 604. 606 may be aligned with the optical axis direction of the light bulb-shaped LED light source 602. However, if the direction of the light bulb base 603 to be matched on the lighting fixture side is not specified in advance, the light distribution light is distributed to all the lighting fixtures. A bulb-shaped LED light source whose axis center is fixed at approximately 90 degrees cannot be adapted.
  For example, as in the case of the right figure of FIG. 6, if the direction of receiving the base pin of the lighting fixture 604 is shifted by 90 degrees, the bulb-type LED light source 602 is not suitable for this fixture. For this reason, it is desirable from the viewpoint of instrument compatibility that the bulb-type LED light source 602 is provided with a rotation mechanism in advance.
  In addition, by separating the housing 104 that holds the LED and the housing 103 that holds the bulb base, the bulb-shaped LED light source can be screwed and removed reliably in the housing 103 that holds the bulb base. Even if the mechanism 105 is added to the bulb-type LED light source, the ease of installation does not deteriorate.
  Furthermore, if a mechanism for automatically rotating the housing for holding the LED is incorporated, automatic control for changing the light distribution with respect to the direction of the rotation axis θ of the lamp cap is also possible.
  In addition, there is the following advantage by providing a mechanism for rotating the housing for holding the LED and the housing for holding the bulb cap with respect to the rotation axis θ direction with the insertion direction of the bulb cap as an axis. FIG. 3 shows a luminaire that is often found in downlight luminaires in which the insertion direction of the bulb cap and the direction of the luminaire opening, that is, the light axis direction of the light distribution of the luminaire is approximately 90 degrees. When using a conventional bulb-type LED light source (LEDs arranged in the direction of rotation of the axis of the bulb cap insertion direction) as described above, it is more illuminating than the light that goes directly to the opening of the luminaire. More light goes directly toward the reflector of the instrument. When the amount of light that goes directly toward the reflector of the luminaire increases, multiple reflections inside the luminaire increase, the light distribution pattern is disturbed, and the light emission efficiency from the luminaire deteriorates. Therefore, an increase in multiple reflections can be suppressed by providing a mechanism for rotating the housing for holding the LED and the housing for holding the bulb cap with respect to the rotation axis θ direction with the insertion direction of the bulb cap as an axis. The housing holding the LED can be rotated in the direction as appropriate.
  The light bulb-shaped LED light source of the present invention is useful as a light bulb-shaped LED light source for illumination because the illumination visual environment after installation can be adjusted favorably from both the light emitting portion and the irradiated surface.
The figure which shows the lightbulb-type LED light source in Embodiment 1 of this invention A diagram showing a conventional bulb-type LED A diagram showing a conventional bulb-type LED Conceptual diagram of conventional issues The figure which shows one detailed Example of a rotation mechanism Conceptual diagram of operation of bulb-type LED without rotating mechanism
Explanation of symbols
101,403,503,603 Light bulb base 102,401,601 LED
103 Housing for Holding Light Bulb Base 104 Housing for Holding LED 105 Rotating Mechanism

Claims (3)

  1. LED,
    A light bulb base for supplying power to the LED;
    A housing for holding the LED;
    A housing for holding the bulb cap;
    A light bulb shaped LED light source having
    The optical axis center of the light distribution beam of the LED is approximately 90 degrees with respect to the insertion direction of the bulb cap,
    A light bulb-shaped LED light source further comprising a mechanism for rotating a portion holding the LED and a portion holding the light bulb cap with respect to a rotation axis θ direction with the insertion direction of the light bulb cap as an axis.
  2. The light bulb-shaped LED light source according to claim 1, wherein a majority of all luminous fluxes are concentrated within plus or minus 90 degrees centered on the center of the beam optical axis.
  3. The light bulb-type LED light source according to claim 2, wherein the housing for holding the LED includes a heat dissipation unit.
JP2004084347A 2004-03-23 2004-03-23 Electric bulb type led light source Pending JP2005276467A (en)

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Application Number Priority Date Filing Date Title
JP2004084347A JP2005276467A (en) 2004-03-23 2004-03-23 Electric bulb type led light source

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JP2010015798A (en) * 2008-07-03 2010-01-21 Panasonic Corp Lamp
EP2149743A1 (en) * 2008-07-31 2010-02-03 Roberto Bellu High Efficiency LED lighting unit
JP2010141290A (en) * 2008-12-11 2010-06-24 Advance Connectek Inc Light emitting diode light source module
JP2010170955A (en) * 2009-01-26 2010-08-05 Panasonic Electric Works Co Ltd Illumination fixture
JP2010287561A (en) * 2009-06-11 2010-12-24 Yeh-Chiang Technology Corp Led lamp
WO2011030567A1 (en) 2009-09-14 2011-03-17 パナソニック株式会社 Light-bulb shaped lamp
JP2011096453A (en) * 2009-10-28 2011-05-12 World Wide Engineering Kk Led lighting having irradiation direction adjustment mechanism and street light using the same
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EP2149743A1 (en) * 2008-07-31 2010-02-03 Roberto Bellu High Efficiency LED lighting unit
JP2010141290A (en) * 2008-12-11 2010-06-24 Advance Connectek Inc Light emitting diode light source module
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JP2010287561A (en) * 2009-06-11 2010-12-24 Yeh-Chiang Technology Corp Led lamp
US8157421B2 (en) 2009-06-11 2012-04-17 Yeh-Chiang Technology Corp. Light emitting diode lamp
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JP2012079794A (en) * 2010-09-30 2012-04-19 Teijin Ltd Heat dissipation structure
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WO2012075632A1 (en) * 2010-12-08 2012-06-14 深圳市蓝旗照明有限公司 Led lamp
CN102753882A (en) * 2010-12-08 2012-10-24 深圳市蓝旗照明有限公司 Led lamp
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