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WO2009067843A1 - Mécanisme à réflecteur multiple pour une source de lumière à diode électroluminescente - Google Patents

Mécanisme à réflecteur multiple pour une source de lumière à diode électroluminescente Download PDF

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Publication number
WO2009067843A1
WO2009067843A1 PCT/CN2007/003356 CN2007003356W WO2009067843A1 WO 2009067843 A1 WO2009067843 A1 WO 2009067843A1 CN 2007003356 W CN2007003356 W CN 2007003356W WO 2009067843 A1 WO2009067843 A1 WO 2009067843A1
Authority
WO
WIPO (PCT)
Prior art keywords
reflector
light source
led light
focus
additional
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.)
Ceased
Application number
PCT/CN2007/003356
Other languages
English (en)
Inventor
Tony Chunlung Young
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 PCT/CN2007/003356 priority Critical patent/WO2009067843A1/fr
Publication of WO2009067843A1 publication Critical patent/WO2009067843A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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
    • F21V7/00—Reflectors for light sources
    • F21V7/04—Optical design
    • 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
    • F21V14/00—Controlling the distribution of the light emitted by adjustment of elements
    • F21V14/02—Controlling the distribution of the light emitted by adjustment of elements by movement of light sources
    • 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
    • F21V7/00—Reflectors for light sources
    • F21V7/0025—Combination of two or more reflectors for a single 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
    • F21V7/00—Reflectors for light sources
    • F21V7/04—Optical design
    • F21V7/06—Optical design with parabolic curvature
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21L—LIGHTING DEVICES OR SYSTEMS THEREOF, BEING PORTABLE OR SPECIALLY ADAPTED FOR TRANSPORTATION
    • F21L4/00—Electric lighting devices with self-contained electric batteries or cells
    • F21L4/02—Electric lighting devices with self-contained electric batteries or cells characterised by the provision of two or more light sources
    • F21L4/022—Pocket lamps
    • F21L4/027—Pocket lamps the light sources being a LED
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S9/00—Lighting devices with a built-in power supply; Systems employing lighting devices with a built-in power supply
    • F21S9/02—Lighting devices with a built-in power supply; Systems employing lighting devices with a built-in power supply the power supply being a battery or accumulator
    • F21S9/022—Emergency lighting devices
    • 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 LED light source for use in lighting equipment powered by dry cells such as a flashlight, lantern, bicycle light or an emergency light or powered by A/C power such as a wall light and more particularly pertains to a multi-reflector mechanism for such a LED light source.
  • An existing LED light source typically has a parabolic reflector to reflect the light rays from the LED.
  • the maximum light emitting center of the LED is usually disposed at the focus.
  • parabolic reflectors do suffer from an aberration called coma.
  • the different parts of the refelctor do not reflect the light rays to the same point. This results in a point of light that is not in the center of the field looking wedge-shaped. The further off-axis, the worse this effect is.
  • a common LED flashlight in a common LED flashlight, it has one LED or an array of LEDs as the light source with an associated parabolic reflector to redirect the light rays from the LED creating a steady beam of light which is the light emitting from the flashlight.
  • the size of the parabolic reflector is in direct proportion as to the size of the LED as used. It is common for a flashlight to use one 1W white LED having a square cross-section of 0.6x0.6 to 1.5x1.5mm diameter with a light emitting angle of 100 to 160 degrees powered by 1.5V or above 4D alkaline cells as the light source.
  • Such a typical LED flashlight usually has a parabolic reflector with a small opening at the center just fit for holding the LED and an opposite wide opening of about 80 to 90mm diameter, and the distance between the small opening and the wide opening ranges from about 40 to 55mm.
  • the shape of the parabolic reflector is shown in FIG. 1.
  • the parabolic reflector can produce a tight light beam forming a small spot of light at an illumination range of 3 meters (approx. 10 feet) or above.
  • a typical dual reflector assembly includes an outer reflector of a parabolic shape to reflect a portion of light from the lamp; an inner reflector also of a parabolic shape adapted to fit within the outer reflector to reflect a substantial amount of light from the lamp; and an adjusting assembly for adjusting the outer reflector and the inner reflector relative to each other to obtain the desired focusing of light beams and the desired light spread.
  • an adjusting assembly for adjusting the outer reflector and the inner reflector relative to each other to obtain the desired focusing of light beams and the desired light spread.
  • Gaseous discharge and fluorescent lamps in the prior art are powered by relatively high power A/C power supply.
  • the applications are all fixed or non-portable and call for high mounting above the lighting area.
  • Incandescent and fluorescent light sources provide a larger area source, and in contrast LEDs provide a small area source. LEDs typically cast light in one direction gt a narrow angle compared to an incandescent or fluorescent lamp of the same lumen level. Further, LEDs can be designed to focus light, while incandescent and fluorescent sources often require an externa! reflector to collect light and direct it in a usable manner.
  • gaseous discharge and fluorescent lamps generate significant amounts of heat in comparison with LEDs. And, unlike gaseous discharge lamps and fluorescent lamps, LEDs do not require a ballast.
  • any dual reflector assembly for a gaseous discharge or fluorescent lamp the focal point of the inner reflector must block the focal point of the outer reflector so as to prevent a focused spot or hot spot from forming by the outer reflector. Otherwise, the light bulb and the ballast will burn out easily because of over-heating.
  • the adjusting assembly of the prior art also requires tools to do the focusing adjustment and it is not convenient for use as the light bulb is connected to the ballast and is fragile and has to be a non-movable unit.
  • a dual reflector mechanism for a LED light source appears to be not practical as LEDs operate differently from gaseous discharge and fluorescent lamps and the dual reflector mechanism may not work on a LED light source, and it appears to be not cost-effective as well because it should take time and resources to devise an optimal shape for the inner reflector and the benefits generated may not justify the additional cost of producing and incorporating the inner reflector. Disclosure of the Invention
  • the object of the present invention is to provide a new multi-reflector mechanism for a LED light source which can emit a bright, sharp and wide spot of light at a shorter distance such as within an illumination range of about 1 to 3 meters (approx. 1 to 10 feet) and, as an alternative by means of a sliding switch, a bright, sharp and small spot of light at a farther distance such as within an illumination range of 3 meters (approx. 10 feet) or above.
  • the outer reflector has an orifice at its vertex through which a corresponding connecting part of the inner reflector passes, thereby fixing the inner reflector within the outer reflector.
  • the orifice may be in the form of a short section of a pipe and the inner reflector may then have a corresponding connecting part for engaging with the pipe.
  • the size of the outer reflector is in direct proportion as to the size of the LED light source as used.
  • the inner reflector has an orifice at its vertex through which the LED light source is coaxially disposed and protrudes out.
  • the inner reflector has an orifice at its vertex through which a corresponding connecting part of the additional inner reflector passes, thereby fixing the additional inner reflector within the inner reflector.
  • the orifice may be in the form of a short section of a pipe and the additional inner reflector may then have a corresponding connecting part for engaging with the pipe.
  • the additional inner reflectors each has an orifice at its vertex through which a corresponding connecting part of the next smaller additional inner reflector passes, thereby fixing the next smaller additional inner reflector within the additional inner reflector.
  • the orifice may be in the form of a short section of a pipe and the next smaller additional inner reflector may then have a corresponding connecting part for engaging with the pipe.
  • the additional innermost reflector has an orifice at its vertex through which the LED light source is coaxially disposed and protrudes out.
  • the LED light source can be one or more LED light bulbs which can be used as a lighting source. It is preferable to use a single white LED light bulb having a square cross-section of 0.6X0.6 to 1.5X1.5mm diameter with a light emitting angle from 90 to 180 degrees which operates with 0.5W or above of electrical power as it is commonly used in a typical flashlight or lantern.
  • the sliding switch is manually operated and has a sliding holder and the
  • the LED light source is disposed at one end of the sliding holder.
  • the sliding holder By pushing the sliding switch, the sliding holder can slide forward and can therefore move the LED light source from the focus of the inner reflector or the additional innermost reflector to the focus of the outer reflector.
  • the reflective surfaces of the outer reflector, the inner reflector and the additional inner reflector(s) may be made of metals such as aluminum polished with mirror finishes or plastics painted with reflective materials commonly used in the field. To produce a bright, sharp and small spot of light at an illumination range of 3 meters (approx.
  • the user can push the sliding switch forward to move the LED light source to the focus of the outer reflector, so that most of the light rays emitted by the LED light source will not be captured by the inner reflector and the additional inner reflector(s) if any but will be captured by the outer reflector.
  • the user can push the sliding switch downward to move the LED light source to the focus of the inner reflector or the additional innermost reflector(s) if any, so that most of the light rays emitted by the LED light source will be captured by the inner reflector and the additional innermost reflector(s) and not by the outer reflector.
  • the spot of light is without grey areas forming at and near the center of the spot and it is ideal for a short distance or an indoor application.
  • the present invention has the following advantages and effects:
  • the present invention can produce a bright, sharp and wide spot of light at a shorter distance such as within an illumination range of about 1 to 3 meters (approx. 1 to 10 feet) and can therefore overcome the defects of the existing lighting equipment such as a flashlight and lantern which provides only a small spot of light with grey areas forming at and near the center of the spot and it is far from being an ideal for a short distance or an indoor application.
  • a flashlight and lantern which provides only a small spot of light with grey areas forming at and near the center of the spot and it is far from being an ideal for a short distance or an indoor application.
  • the present invention since the present invention only requires one or more additional reflectors and a simple sliding switch and no magnifier lens is required, the cost of manufacture is lower with regard to both materials and labor.
  • a bright, sharp and small spot of light at a farther distance such as within an illumination range of 3 meters (approx. 10 feet) or above can be provided.
  • the present invention can therefore provide two modes of spread of light with one configuration, it is more simple and convenient to use. Further, as the present invention does not have many parts, its construction is light in weight and compact in size.
  • FIG. 1 shows the parabolic reflector and the light rays reflected of a typical LED flashlight of the known art.
  • FIG. 2 shows the construction of a typical dual reflector assembly of a gaseous discharge lamp of the known art.
  • FIG. 3 shows the first embodiment of the present invention where the LED light source is at the focus of the inner reflector.
  • FlG. 4 shows the light rays reflected of the first embodiment where the LED light source is at the focus of the inner reflector.
  • FIG. 5 shows the first embodiment where the LED light source is at the focus of the outer reflector.
  • FIG. 6 shows the light rays reflected of the first embodiment where the LED light source is at the focus of the outer reflector.
  • FIG. 7 shows the second embodiment of the present invention where the
  • LED light source is at the focus of the additional inner reflector.
  • FIG. 8 shows the light rays reflected of the second embodiment where the LED light source is at the focus of the additional inner reflector.
  • FlG. 9 shows the second embodiment where the LED light source is at the focus of the outer reflector.
  • FIGS. 3 to 6 illustrate the first embodiment of the present invention, which is used in a common flashlight.
  • this embodiment comprises a LED light source 1, an outer parabolic reflector 3, an inner parabolic reflector 4 and a sliding switch 2.
  • the outer reflector 3 has an orifice at its vertex through which a corresponding connecting part of the inner reflector 4 passes, thereby fixing the inner reflector 4 within the outer reflector 3.
  • the orifice is in the form of a short section of a pipe and the inner reflector 4 has a corresponding connecting part for engaging with the pipe.
  • the inner reflector 4 has an orifice at its vertex through which the LED light source 1 is coaxially disposed and protrudes out.
  • the sliding switch is manually operated and has a sliding holder and the LED light source 1 is disposed at one end of the sliding holder. By pushing the sliding switch, the sliding holder can slide forward and can therefore move the
  • LED light source 1 from the focus 41 of the inner reflector 4 to the focus 31 of the outer reflector 3.
  • the LED light source 1 is one single 1W white LED light bulb having a square cross-section of 0.6x0.6 to 1.5x1 ,5mm diameter with a light emitting angle of 100 to 180 degrees which is powered by 1.5V or above 4D alkaline cells.
  • the LED light source can be two or more LED light bulbs.
  • the opening of the outer reflector 3 is of about 80 to 90mm diameter and the distance between the opening and the vertex of the outer reflector 3 ranges from about 40 to 55mm.
  • the size of the outer reflector is in direct proportion as to the size of the LED light source as used.
  • the reflective surfaces of the outer reflector 3 and the inner reflector 4 are made of aluminum polished with mirror finishes. In other embodiments, they can be made of other metals polished with mirror finishes or plastics painted with reflective materials commonly used in the field.
  • the first embodiment can produce a bright, sharp and small spot of light at an illumination range of 3 meters (approx. 10 feet) or above.
  • the user can push the sliding switch forward to move the LED light source 1 to the focus 31 of the outer reflector 3, so that most of the light rays emitted by the LED light source 1will not be captured by the inner reflector 4 but will be captured by the outer reflector 3.
  • the first embodiment can alternatively produce a bright, sharp and wide spot of light at an illumination range of about 1 to 3 meters (approx. 1 to 10 feet).
  • the user can push the sliding switch downward to move the LED light source 1 to the focus 41 of the inner reflector 4, so that most of the light rays emitted by the LED light source 1 will be captured by the inner reflector 4 and not by the outer reflector 3.
  • the spot of light is without grey areas forming at and near the center of the spot and it is ideal for a short distance or an indoor application.
  • the first embodiment can therefore overcome the defects of the existing lighting equipment which provides only a small spot of light with grey areas forming at and near the center of the spot.
  • FIG. 7 to 10 illustrate the second embodiment of the present invention, which is also used in a common flashlight.
  • the configuration is substantially identical to the first embodiment save that the second embodiment further has an additional inner parabolic reflector 5.
  • the inner reflector 4 has an orifice at its vertex through which a corresponding connecting part of the additional inner reflector 5 passes, thereby fixing the additional inner reflector 5 within the inner reflector 4.
  • the orifice is in the form of a short section of a pipe and the additional inner reflector 5 has a corresponding connecting part for engaging with the pipe.
  • the second embodiment can produce a bright, sharp and small spot of light at an illumination range of 3 meters (approx. 10 feet) or above.
  • the user can push the sliding switch forward to move the LED light source 1 to the focus 31 of the outer reflector 3, so that most of the light rays emitted by the LED light source 1will not be captured by the inner reflector
  • the second embodiment can alternatively produce a bright, sharp and wide spot of light at an illumination range of about 1 to 3 meters (approx. 1 to 10 feet).
  • the user can push the sliding switch downward to move the LED light source 1 to the focus 51 of the additional inner reflector 5, so that most of the light rays emitted by the LED light source 1 will be captured by the additional inner reflector 5 and the inner reflector 4 and not by the outer reflector 3.
  • the spot of light is without grey areas forming at and near the center of the spot and it is ideal for a short distance or an indoor application.
  • the second embodiment can therefore overcome the defects of the existing lighting equipment which provides only a small spot of light with grey areas forming at and near the center of the spot.
  • the present invention provides a new multi-reflector mechanism for a LED light source which can emit a bright, sharp and wide spot of light at a shorter distance such as within an illumination range of about 1 to 3 meters (approx. 1 to 10 feet) and, as an alternative by means of a sliding switch, a bright, sharp and small spot of light at a farther distance such as within an illumination range of 3 meters (approx. 10 feet) or above. It can provide a new multi-reflector mechanism for a LED light source which is susceptible of a low cost of manufacture with regard to both materials and labor, and which accordingly is then susceptible of a low price of sale to the buying public. It can also provide a new multi-reflector mechanism for a LED light source which is light in weight and compact in size and is simple and convenient to use.

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Arrangement Of Elements, Cooling, Sealing, Or The Like Of Lighting Devices (AREA)

Abstract

L'invention porte sur un mécanisme à réflecteur multiple pour une source de lumière à diode électroluminescente, comprenant une source de lumière à diode électroluminescente (1), un réflecteur parabolique externe (3), un réflecteur parabolique interne (4) et un commutateur coulissant (2). Le réflecteur interne (4) est disposé à l'intérieur du réflecteur externe (4) avec les foyers (31, 41) des deux réflecteurs en des points différents sur un axe commun, et le foyer (31) du réflecteur externe (3) étant le plus haut, le plus près du plan de l'ouverture du réflecteur externe (3). La source de lumière à diode électroluminescente (1) est disposée à l'intérieur du réflecteur interne (4) et fait saillie vers l'extérieur à partir du sommet du réflecteur interne (4), et est disposée de façon coaxiale et réglable au niveau ou au voisinage du foyer (41, 31) du réflecteur interne (4) ou du réflecteur externe (3). L'angle d'émission de lumière de la source de lumière à diode électroluminescente est supérieur à l'angle formé par les deux points sur le bord de l'ouverture formant le diamètre de celle-ci et le foyer (41) du réflecteur interne (4). Le commutateur coulissant (2) est connecté à la source de lumière à diode électroluminescente (1) pour déplacer mécaniquement la source de lumière à diode électroluminescente (1) de façon coaxiale par rapport au réflecteur interne (4) et au réflecteur externe (3) vers le foyer (41) du réflecteur interne (4) ou le foyer (31) du réflecteur externe (3).
PCT/CN2007/003356 2007-11-28 2007-11-28 Mécanisme à réflecteur multiple pour une source de lumière à diode électroluminescente Ceased WO2009067843A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PCT/CN2007/003356 WO2009067843A1 (fr) 2007-11-28 2007-11-28 Mécanisme à réflecteur multiple pour une source de lumière à diode électroluminescente

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/CN2007/003356 WO2009067843A1 (fr) 2007-11-28 2007-11-28 Mécanisme à réflecteur multiple pour une source de lumière à diode électroluminescente

Publications (1)

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WO2009067843A1 true WO2009067843A1 (fr) 2009-06-04

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102012017262A1 (de) * 2012-08-31 2014-03-06 Volkswagen Aktiengesellschaft Leuchtvorrichtung für ein Fahrzeug
CN107884629A (zh) * 2017-10-31 2018-04-06 北京航空航天大学 一种天馈式紧缩场装置

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN2075300U (zh) * 1990-09-27 1991-04-17 高等教育出版社新技术试验厂 通风、反射灯罩
DE19749181A1 (de) * 1997-11-07 1999-05-20 Audi Ag Scheinwerferanordnung
CN1321849A (zh) * 1999-08-09 2001-11-14 通用电气公司 点抛物面反光灯
US20040165388A1 (en) * 2003-02-25 2004-08-26 Masao Shoji Illumination apparatus
CN2699115Y (zh) * 2004-05-18 2005-05-11 胡晓松 Led发光灯头
CN2699114Y (zh) * 2004-05-18 2005-05-11 胡晓松 发光灯头
CN2814103Y (zh) * 2005-06-29 2006-09-06 厦门万能达电子发展有限公司 一种手电筒

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN2075300U (zh) * 1990-09-27 1991-04-17 高等教育出版社新技术试验厂 通风、反射灯罩
DE19749181A1 (de) * 1997-11-07 1999-05-20 Audi Ag Scheinwerferanordnung
CN1321849A (zh) * 1999-08-09 2001-11-14 通用电气公司 点抛物面反光灯
US20040165388A1 (en) * 2003-02-25 2004-08-26 Masao Shoji Illumination apparatus
CN2699115Y (zh) * 2004-05-18 2005-05-11 胡晓松 Led发光灯头
CN2699114Y (zh) * 2004-05-18 2005-05-11 胡晓松 发光灯头
CN2814103Y (zh) * 2005-06-29 2006-09-06 厦门万能达电子发展有限公司 一种手电筒

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102012017262A1 (de) * 2012-08-31 2014-03-06 Volkswagen Aktiengesellschaft Leuchtvorrichtung für ein Fahrzeug
CN107884629A (zh) * 2017-10-31 2018-04-06 北京航空航天大学 一种天馈式紧缩场装置

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