JP4487888B2 - LED lighting equipment - Google Patents

LED lighting equipment Download PDF

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Publication number
JP4487888B2
JP4487888B2 JP2005262948A JP2005262948A JP4487888B2 JP 4487888 B2 JP4487888 B2 JP 4487888B2 JP 2005262948 A JP2005262948 A JP 2005262948A JP 2005262948 A JP2005262948 A JP 2005262948A JP 4487888 B2 JP4487888 B2 JP 4487888B2
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JP
Japan
Prior art keywords
led
light
concave mirror
rgb sensor
red
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Expired - Fee Related
Application number
JP2005262948A
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Japanese (ja)
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JP2007080533A (en
Inventor
卓也 中谷
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パナソニック電工株式会社
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Priority to JP2005262948A priority Critical patent/JP4487888B2/en
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    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21LIGHTING
    • F21SNON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S8/00Lighting devices intended for fixed installation
    • F21S8/02Lighting devices intended for fixed installation of recess-mounted type, e.g. downlighters
    • F21S8/026Lighting devices intended for fixed installation of recess-mounted type, e.g. downlighters intended to be recessed in a ceiling or like overhead structure, e.g. suspended ceiling
    • 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
    • F21V7/00Reflectors for light sources
    • F21V7/0008Reflectors for light sources providing for indirect lighting
    • 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
    • F21Y2103/00Elongate light sources, e.g. fluorescent tubes
    • F21Y2103/30Elongate light sources, e.g. fluorescent tubes curved
    • F21Y2103/33Elongate light sources, e.g. fluorescent tubes curved annular
    • 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
    • F21Y2113/00Combination of light sources
    • F21Y2113/10Combination of light sources of different colours
    • F21Y2113/13Combination of light sources of different colours comprising an assembly of point-like light sources
    • 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]

Description

  The present invention relates to an LED lighting apparatus.
  As this kind of LED lighting fixture, what is provided with red LED, green LED, and blue LED, generates white light by mixing the luminescent color of each LED, and irradiates an illuminated surface conventionally is provided. Yes.
  FIG. 3 shows an example of a conventional LED lighting fixture, and the LED lighting fixture includes a container body 10 that is embedded in an embedded hole 21 provided in the ceiling member 20 with an opening facing downward. ing. Inside the vessel 10, red LEDs 2R, green LEDs 2G, and blue LEDs 2B are respectively arranged with the light emitting surfaces facing the openings of the vessel 10, and each diffuser plate 15 arranged in the opening of the vessel 10 is used for each. By diffusing the emission colors of the LEDs 2R, 2G, and 2B, the light of each color is mixed to generate white light.
  Here, the light outputs of the LEDs 2R, 2G, and 2B of the respective colors change according to the use temperature and the accumulated use time, and the light color of the mixed light changes accordingly, so that the lights of the respective LEDs 2R, 2G, and 2B gather. The RGB sensor 3 is arranged at the center of the diffusion plate 15 and the RGB sensor 3 individually detects the light intensity of each color component of RGB. And the control part which is not illustrated controls the light temperature of each LED2R, 2G, 2B based on the detection result of RGB sensor 3, and controls the color temperature of emitted light color to predetermined color temperature.
Further, in the LED lighting apparatus disclosed in Patent Document 1, instead of arranging the RGB sensor 3 at the center of the diffusion plate 15, an optical fiber is extended inside the diffusion plate 15 along the arrangement direction of the RGB LEDs. The light emitted from each LED is guided to the RGB sensor using this optical fiber, and the light output of each color LED is controlled based on the detection result of the RGB sensor.
JP-T-2002-533870 (paragraphs [0013]-[0015])
  In the LED lighting apparatus described above, the RGB sensor 3 is attached to the diffusion plate 15 that mixes the light by diffusing the light of the LEDs 2R, 2G, and 2B of each color, or the light emission of each LED is disposed inside the diffusion plate 15 by the RGB sensor. Since the optical fiber that guides light is disposed, a part of the irradiation light is blocked by the RGB sensor 3 and the optical fiber, and there is a problem that a shadow is formed on the illuminated surface.
  The present invention has been made in view of the above problems, and an object of the present invention is to provide an LED lighting apparatus that prevents a shadow from being formed on an illuminated surface.
In order to achieve the above object, the present invention provides a dome-shaped concave mirror having a circular opening and having a recessed central portion compared to the peripheral portion, and a light emitting surface along the peripheral portion of the concave mirror. In an LED lighting apparatus that includes a red LED, a green LED, and a blue LED that are respectively arranged on the sides, and that irradiates light to the illuminated surface by reflecting light emitted from each LED by the concave mirror, at the center of the concave mirror An RGB sensor that individually measures the light intensity of each color component of red, green, and blue, and a color balance of red, green, and blue based on the detection result of the RGB sensor so that a predetermined setting value is obtained And a control unit for controlling the light output of each LED.
  According to the present invention, the red LED, the green LED, and the blue LED are respectively arranged along the peripheral portion of the concave mirror, and the RGB sensor that individually measures the light intensity of each color component of red, green, and blue is provided at the center of the concave mirror. Since the mixed color light is irradiated onto the illuminated surface by reflecting the light from each LED with a concave mirror, a part of the light illuminated on the illuminated surface is not blocked by the RGB sensor. It is possible to prevent a shadow from being formed on the illuminated surface. In addition, since the RGB sensor is arranged at the center of the concave mirror where the light from each LED is best collected, the light intensity of each color component can be accurately detected, and the detection result of the RGB sensor is used. In addition, the control unit controls the light output of each LED, so that irradiation light having a desired color temperature can be obtained.
  According to the present invention, a red LED, a green LED, and a blue LED are respectively arranged along the periphery of the concave mirror, and an RGB sensor that individually measures the light intensity of each color component of red, green, and blue is provided at the center of the concave mirror. Since the mixed color light is irradiated onto the illuminated surface by reflecting the light from each LED with a concave mirror, a part of the light illuminated on the illuminated surface is not blocked by the RGB sensor. There is an effect that it is possible to prevent a shadow from being formed on the illuminated surface. In addition, since the RGB sensor is arranged at the center of the concave mirror where the light from each LED is best collected, the light intensity of each color component can be accurately detected, and the detection result of the RGB sensor is used. In addition, the control unit controls the light output of each LED, so that it is possible to obtain irradiation light having a desired color temperature.
  Below, one Embodiment which applied the LED lighting fixture which concerns on this invention to what is called a downlight is described based on FIG.1 and FIG.2.
  FIG. 1A is a sectional view showing a construction state of the LED lighting apparatus A, FIG. 1B is a B-B ′ sectional view, and FIG. 2 is a block diagram of the LED lighting apparatus A.
  The container 10 of the LED lighting apparatus A has a cylindrical shape with one end closed, and is embedded in an embedded hole 21 provided in the ceiling member 20 with the opening on the other end facing downward. It is comprised by the cylinder part 11 and the flat donut-shaped cap part 12 fitted by the opening part of the cylinder part 11, and the collar part 13 protrudes from the lower periphery of the cap part 12 toward the outer side. . The container body 10 is inserted into an embedded hole 21 provided in the ceiling material 20, and the ceiling material is used with appropriate means in a state where the upper surface of the flange portion 13 is in contact with the lower surface of the ceiling material 20. 20 is fixed.
  Inside the vessel 10 is housed a dome-shaped concave mirror 14 whose surface is mirror-finished. The concave mirror 14 is recessed in the center compared to the peripheral portion, and is housed in the container 10 with the peripheral portion being placed on the upper surface of the cap portion 12. A plurality of red LEDs 2R, green LEDs 2G, and blue LEDs 2B are arranged on the upper surface of the cap portion 12 along the peripheral portion of the concave mirror 14 with the light emitting surface facing the central portion of the concave mirror 14 on the inner side of the concave mirror 14. It is arranged one by one. Thus, the light emitted from the LEDs 2R, 2G, and 2B of the respective colors is mixed by being reflected by the concave mirror 14 to generate white light, which is irradiated onto the illuminated surface through the window hole 12a of the cap portion 12. The LEDs 2R, 2G, 2B of the respective colors are cyclically arranged in a predetermined order (for example, red LED 2R → green LED 2G → blue LED 2B → red LED 2R...) Along the peripheral portion of the concave mirror 14, so The LEDs 2R, 2G, and 2B are evenly arranged so that light is easily mixed.
  Here, the RGB sensor 3 is attached to the central portion of the concave mirror 14 with the light receiving surface facing downward. The RGB sensor 3 individually measures the light intensity of each color component of red, green, and blue, and the control unit 1 determines the color balance of red, green, and blue based on the detection result of the RGB sensor 3. The light output of each LED 2R, 2G, 2B is controlled so that the set value becomes.
  As described above, in the LED lighting apparatus A of the present embodiment, the red LED 2R, the green LED 2G, and the blue LED 2B are arranged along the peripheral portion of the concave mirror 14, and the light intensity of each color component of red, green, and blue Since the RGB sensor 3 for individually measuring the light is disposed in the center of the concave mirror 14 and the light from each LED 2R, 2G, 2B is reflected by the concave mirror 14, the mixed color white light is irradiated onto the illuminated surface. The RGB sensor 3 does not block a part of the light irradiated to the illuminated surface, and can prevent the illuminated surface from being shaded. In addition, since the RGB sensor 3 is arranged at the center of the concave mirror 14 where the light from each of the LEDs 2R, 2G, and 2B is best collected, the light intensity of each color component can be accurately detected. The control unit 1 controls the light output of each of the LEDs 2R, 2G, and 2B based on the detection result 3 so that white light having a predetermined color temperature can be obtained.
  In the present embodiment, the light emitted from the red LED 2R, the green LED 2G, and the blue LED 2B is mixed to generate white light. However, the light color of the light applied to the illuminated surface is not limited to white light. By controlling the LEDs 2R, 2G, and 2B of the respective colors so that the color balance becomes a predetermined set value, it is possible to irradiate the illuminated surface with light of a desired color temperature (light color).
  Moreover, although this embodiment demonstrated based on the example which applied the LED lighting fixture to the downlight, it cannot be overemphasized that the LED lighting fixture which concerns on this invention may be applied to lighting fixtures other than a downlight.
It is sectional drawing which shows the construction state of the LED lighting fixture of this embodiment. It is a block diagram same as the above. It is sectional drawing which shows the construction state of the conventional LED lighting fixture.
Explanation of symbols
A LED lighting fixture 2R Red LED
2G green LED
2B Blue LED
3 RGB sensor 10 Body 14 Concave mirror

Claims (1)

  1. A dome-shaped concave mirror having a circular opening and having a concave central portion compared to the peripheral portion, and a red LED and a green LED arranged along the peripheral portion of the concave mirror with the light emitting surface being the central portion side of the concave mirror. And a blue LED, and an LED lighting apparatus that irradiates the illuminated surface with light mixed by reflecting light emitted from each LED with a concave mirror. An RGB sensor that individually measures the light intensity of each color component, and a control that controls the light output of each LED so that the color balance of red, green, and blue becomes a predetermined set value based on the detection result of the RGB sensor The LED lighting fixture characterized by providing the part.
JP2005262948A 2005-09-09 2005-09-09 LED lighting equipment Expired - Fee Related JP4487888B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2005262948A JP4487888B2 (en) 2005-09-09 2005-09-09 LED lighting equipment

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2005262948A JP4487888B2 (en) 2005-09-09 2005-09-09 LED lighting equipment

Publications (2)

Publication Number Publication Date
JP2007080533A JP2007080533A (en) 2007-03-29
JP4487888B2 true JP4487888B2 (en) 2010-06-23

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106969271A (en) * 2015-10-15 2017-07-21 通用电气照明解决方案有限责任公司 The indirect light mixing LED module applied for point source

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US8227995B2 (en) 2007-10-12 2012-07-24 Koninklijke Philips Electronics N.V. Sensing coded light using retro reflectors
JP4174554B1 (en) * 2008-02-22 2008-11-05 利男 平塚 Lighting device
JP5266603B2 (en) * 2008-02-29 2013-08-21 スタンレー電気株式会社 Semiconductor light emitting device
JP5418103B2 (en) * 2008-09-30 2014-02-19 東芝ライテック株式会社 lighting equipment
US8408724B2 (en) 2008-12-26 2013-04-02 Toshiba Lighting & Technology Corporation Light source module and lighting apparatus
WO2010126065A1 (en) * 2009-04-27 2010-11-04 東芝ライテック株式会社 Illuminating device
JP5669479B2 (en) 2009-08-19 2015-02-12 エルジー イノテック カンパニー リミテッド Lighting device
CN102192451A (en) * 2010-03-11 2011-09-21 上海三思电子工程有限公司 Anti-dazzle LED (light emitting diode) downlight with high luminous efficiency
EP2365525A3 (en) 2010-03-12 2013-05-29 Toshiba Lighting & Technology Corporation Illumination apparatus having an array of red and phosphour coated blue LEDs
JP4676563B1 (en) * 2010-04-11 2011-04-27 幸春 濱口 LED lighting device integrated with lighting equipment.
WO2012047245A1 (en) * 2010-10-04 2012-04-12 Light Engine Limited Flat modulus light source
JP5713780B2 (en) * 2011-04-20 2015-05-07 三菱電機株式会社 Lighting device
US8568000B2 (en) * 2011-08-29 2013-10-29 Tai-Her Yang Annular-arranged lamp capable of backward projecting by concave sphere
JP5311695B1 (en) * 2012-12-04 2013-10-09 レボックス株式会社 Lighting device
CN104235763B (en) * 2013-06-17 2017-01-18 展晶科技(深圳)有限公司 LED lighting device
CN104918372B (en) * 2015-06-08 2017-09-29 欧普照明股份有限公司 Lighting device and its control method and control system
DE202016008521U1 (en) 2015-06-08 2018-05-17 Opple Lighting Co. Ltd. Lighting device and control system for it
DE202016008522U1 (en) 2015-06-08 2018-05-22 Opple Lighting Co. Ltd. Lighting device and control system for it
US20170108177A1 (en) * 2015-10-15 2017-04-20 GE Lighting Solutions, LLC Indirect color-mixing led module for point-source source application

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106969271A (en) * 2015-10-15 2017-07-21 通用电气照明解决方案有限责任公司 The indirect light mixing LED module applied for point source

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