JP2011129473A - Lighting fixture - Google Patents

Lighting fixture Download PDF

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Publication number
JP2011129473A
JP2011129473A JP2009289565A JP2009289565A JP2011129473A JP 2011129473 A JP2011129473 A JP 2011129473A JP 2009289565 A JP2009289565 A JP 2009289565A JP 2009289565 A JP2009289565 A JP 2009289565A JP 2011129473 A JP2011129473 A JP 2011129473A
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JP
Japan
Prior art keywords
led chip
lighting fixture
light
opening
led
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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
JP2009289565A
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Japanese (ja)
Inventor
Taiichi Muranaka
泰一 村中
Original Assignee
Panasonic Electric Works Co Ltd
パナソニック電工株式会社
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Priority to JP2009289565A priority Critical patent/JP2011129473A/en
Publication of JP2011129473A publication Critical patent/JP2011129473A/en
Application status is Pending legal-status Critical

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Abstract

<P>PROBLEM TO BE SOLVED: To provide a lighting fixture capable of providing light of a wide range augmenting brightness feeling of a space with little energy, while restraining loss of light and generation of glare. <P>SOLUTION: The lighting fixture 10 is provided with an LED package 11 with an LED chip 13 mounted on a substrate 12, a nearly bowl-shaped reflecting plate 15 equipped with a first opening 16 where the LED chip 13 is exposed and a second opening 17 irradiating light emitted from the LED chip 13, a nearly dome-shaped diffusion cover 18 fitted so as to cover the LED chip 13 and protruded toward inside of the reflecting plate 15 from the first opening 16, and unevenness 29 fitted at least on either a inner face or an outer face of the diffusion cover 18 for diffusing light from the LED chip 13. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a luminaire that includes an LED (light emitting diode) as a light source and is applied to a downlight that illuminates a corridor, a wall, etc. by being embedded in a ceiling surface of a house or the like.

  As an example of a conventional lighting fixture, there is one provided with a plurality of LEDs and a reflector disposed on the light projecting side of the plurality of LEDs (see, for example, Patent Document 1).

JP 2009-187773 A (FIG. 1, claim 1)

In the conventional lighting fixture disclosed in Patent Document 1, a light diffusing plate is disposed on the light emitting side of the LED so that the light from the LED is diffused through the light diffusing plate to be emitted. However, the LED has a high light directivity, a high luminance, and a low solid angle light source due to its structure, and therefore emits strong and thin light. For this reason, the LED is prone to so-called glare, which is defined as glare that causes discomfort and difficulty in seeing objects. Therefore, as shown in FIG. 8, in the conventional lighting fixture 100, the LED 101 is positioned at the back from the opening of the reflector so that glare does not occur. However, in such a conventional lighting fixture 100, the light in the lateral direction from the LED 101 is cut, thereby having an irradiation range 104 away from the ceiling surface 103 with respect to the wall surface 102.
Therefore, the conventional lighting apparatus 100 cannot irradiate light on the wide range of the wall surface 102.

  In contrast to the above, a flat diffusion cover with low transparency is provided on the LED emission side, or the LED is placed near the opening of the reflector so that the LED light is irradiated to the ceiling surface. A lighting fixture was also proposed. However, in such a conventional lighting apparatus, the glare is increased and the generation of glare cannot be suppressed.

  The present invention has been made to solve the above-described problems, and its purpose is to provide a wide range of light that increases the sense of brightness of the space with less energy while suppressing the loss of light and the occurrence of glare. It is in providing the lighting fixture which can do.

  The lighting fixture according to the present invention is provided with an LED package having an LED chip mounted on a substrate, a first opening from which the LED chip is exposed, and a second opening to irradiate light emitted from the LED chip. A substantially bowl-shaped reflector, a substantially dome-shaped diffusion cover provided so as to cover the LED chip and projecting from the first opening into the reflector; and an inner surface and an outer surface of the diffusion cover It is provided in at least one of them, and has an unevenness for diffusing light from the LED chip.

In the present invention, a predetermined glare cut angle is set by the substantially dome-shaped portion of the diffusion cover.
Therefore, in this invention, even if it arrange | positions an LED chip in the position close | similar to the 1st opening part of a reflecting plate, the illumination which does not produce glare can be performed.

In the present invention, the light emitted from the LED chip is refracted by the unevenness of the diffusion cover and emitted in the lateral direction.
Therefore, in the present invention, it is possible to perform a wide range of illumination that increases the feeling of brightness in space with less energy.

The luminaire according to the present invention is the above luminaire,
The LED package is oriented so that the main optical axis of light emitted from the LED chip intersects the axis of the reflector,
An auxiliary reflecting portion for reflecting light emitted from the LED chip in a lateral direction in a direction along the main optical axis is provided on the first opening side of the reflecting plate,
The auxiliary reflecting portion has a spherical radius of curvature smaller than other portions of the reflecting plate.

In the present invention, the light emitted from the LED chip is emitted in a direction intersecting the axis of the reflector, and the light emitted from the LED chip to the side is a direction along the main optical axis by the auxiliary reflecting portion. Reflected in.
Therefore, in this invention, the light radiate | emitted from the LED chip can be utilized without waste.

The luminaire according to the present invention is the above luminaire,
The diffusion cover has a refraction property to emit the light in a direction different from the incident direction.

In the present invention, the light emitted from the LED chip is emitted in a direction different from the incident direction due to the refractive property of the diffusion cover.
Therefore, in the present invention, the light emitted from the LED chip is actively directed in the lateral direction, so that a wide range of illumination that increases the feeling of brightness of the space can be performed with less energy.

According to the lighting fixture of the present invention, the light emitted from the LED chip is set at a predetermined glare cut angle by the substantially dome-shaped portion of the diffusion cover, and is refracted by the unevenness of the diffusion cover and emitted in the lateral direction. .
Thereby, according to the lighting fixture of this invention, it has the effect that the wide range light which increases the brightness feeling of space can be provided with little energy, suppressing generation | occurrence | production of light loss and glare.

The vertical sectional view of the lighting fixture of a 1st embodiment concerning the present invention. The fragmentary sectional view of the diffusion cover applied to the lighting fixture of FIG. Schematic diagram explaining the irradiation range of the lighting fixture of FIG. The vertical sectional view of the lighting fixture of a 2nd embodiment concerning the present invention. Bottom view of the lighting fixture of FIG. The vertical sectional view of the lighting fixture of a 3rd embodiment concerning the present invention. The fragmentary sectional view of the diffusion cover applied to the lighting fixture of FIG. Schematic diagram explaining the irradiation range of a conventional lighting fixture

Hereinafter, the lighting fixture which concerns on several embodiment of this invention is demonstrated with reference to drawings.
(First embodiment)
As shown in FIGS. 1 and 2, a lighting fixture 10 according to a first embodiment of the present invention includes a single LED package 11 in which an LED chip 13 is mounted on a substrate 12, and a fixture main body that houses the LED package 11. (Cabinet) 14, a substantially bowl-shaped reflector 15 provided with a first opening 16 from which the LED chip 13 is exposed and a second opening 17 that emits light emitted from the LED chip 13, and the LED chip 13 And a substantially dome-shaped diffusion cover 18 that protrudes from the first opening 16 into the reflecting plate 15 and is formed in a mounting hole formed on a ceiling surface (not shown) such as a house. Buried.

  The instrument main body 14 is formed in a cylindrical shape by, for example, press-molding a metal plate member or using a hard resin material, and the instrument main body flange 19 formed at the lower end portion is the reflector plate 15. The upper surface is screwed with a screw 20. An LED package housing portion 21 having an open bottom is formed on the lower surface of the appliance main body 14, and the LED package 11 is mounted in the LED package housing portion 21 via an LED mounting base 22. The LED chip 13 of the LED package 11 has an optical axis directed downward of the instrument body 14. The substrate 12 of the LED package 11 is electrically connected to a DC power supply circuit (not shown).

  The reflecting plate 15 is formed in a cylindrical shape using, for example, a hard resin material, and a substantially bowl-shaped reflecting surface 23 is recessed from the lower surface of the central portion toward the upper surface. A diffusion cover mounting portion 24 is formed on the top of the reflecting surface 23 in the reflecting plate 15. The first opening 16 is disposed below the diffusion cover mounting portion 24 at the top of the reflection surface 23. The second opening 17 is disposed at the lower end of the reflecting surface 23. The reflector 15 has a reflector flange 25 formed at the lower end thereof, and a plurality of attachment springs 26 attached to the outer periphery thereof. When the lighting fixture 10 is installed, the mounting spring 26 is picked and elastically deformed so that the outer shape becomes smaller while the fixture body 14 and the reflector 15 are pushed into the mounting holes on the ceiling surface. And the attachment spring 26 is hooked on the upper surface of the ceiling surface by elastically restoring after the fixture body 14 and the reflection plate 15 are inserted into the attachment holes and the reflection plate flange 25 abuts on the ceiling surface. Is supported on the ceiling.

  The diffusion cover 18 is formed in a disk shape having a predetermined thickness using a resin material having translucency such as polycarbonate or acrylic, and has a substantially dome-shaped diffusion convex shape at the center thereof. And an annular diffusion cover flange 28 on the outer periphery of the diffusion convex portion 27. A textured unevenness 29 is formed on the outer surface of the diffusion convex portion 27. The unevenness 29 may be formed on the inner surface of the diffusion convex portion 27 instead of the outer surface of the diffusion convex portion 27, or may be formed on the outer surface and the inner surface of the diffusion convex portion 27. The diffusion cover 18 is assembled in such a manner that the diffusion cover flange 28 is accommodated in the diffusion cover mounting portion 24 and is sandwiched and assembled between the reflector 15 and the instrument main body 14, so that the diffusion convex portion 27 covers the LED chip 13. Projecting into the reflecting surface 23 from the opening 16.

  Next, optical characteristics of the lighting fixture 10 will be described. In the lighting fixture 10, the diffusion convex portion 27 of the diffusion cover 18 protrudes into the reflection surface 23 from the first opening portion 16 of the reflection plate 15, and therefore, the diffusion protrusion 27 and the second opening portion of the reflection plate 15. A predetermined glare cut angle θ 1 is set by a line A connecting 17. In the lighting fixture 10, an external commercial power source is converted into a DC power source by a DC power source circuit, and the DC power source is applied to a printed circuit (not shown) provided on the substrate 12 of the LED package 11, whereby the LED chip 13 emits light. The light emitted from the LED chip 13 travels toward the diffusion cover 18 and is incident on the inner surface of the diffusion convex portion 27, and then is refracted by the unevenness 29 on the outer surface of the diffusion convex portion 27 to be outside the diffusion convex portion 27. It is emitted toward Then, reflected light α1 that is refracted by the irregularities 29 on the outer surface of the diffusing convex portion 27 and diffused and emitted in the lateral direction is created. Therefore, as shown in FIG. 3, a wide irradiation range 200 close to the ceiling surface 103 is formed with respect to the wall surface 102 by the reflected light α1.

In the luminaire 10 of the first embodiment, a predetermined glare cut angle θ1 is set by the diffusion convex portion 27 of the diffusion cover 18.
Therefore, in the lighting fixture 10 of 1st Embodiment, even if it arrange | positions the LED chip 13 in the position close | similar to the 1st opening part 16 of the reflecting plate 15, the illumination which does not produce a glare can be performed.

In the luminaire 10 of the first embodiment, the light emitted from the LED chip 13 is refracted by the unevenness 29 provided on the diffusion convex portion 27 of the diffusion cover 18 and is emitted in the lateral direction.
Therefore, in the lighting fixture 10 of 1st Embodiment, the wide range illumination which increases a feeling of brightness of space with little energy can be performed.

(Second Embodiment)
Next, the lighting fixture of 2nd Embodiment of this invention is demonstrated. In the following embodiments, components that are the same as those in the first embodiment described above or functionally similar components are simplified or omitted by giving the same reference numerals or equivalent symbols in the drawings. To do.

  As shown in FIGS. 4 and 5, the lighting fixture 40 of the second embodiment of the present invention is such that the main optical axis B of the light emitted from the LED chip 13 intersects the axis C of the reflector 15. The LED package 11 is oriented. In the luminaire 40, an auxiliary reflecting portion 41 for reflecting light emitted from the LED chip 13 to the side in the direction along the main optical axis B is provided on the first opening 16 side of the reflecting plate 15. The auxiliary reflecting portion 41 is set to have a spherical radius of curvature (the reciprocal of the curvature) smaller than that of other portions of the reflecting surface 23, and for example, a mirror finish having a high reflectivity is applied to the deposited metal film. .

  In the lighting fixture 40, the light emitted from the LED chip 13 travels toward the diffusion cover 18 and enters the inner surface of the diffusion convex portion 27, and then is refracted by the unevenness 29 on the outer surface of the diffusion convex portion 27. The light is emitted toward the outside of the shape portion 27. At this time, the light emitted from the LED chip 13 toward the reflection surface 23 is converted into reflected light α1 that is reflected by the reflection surface 23 and then emitted in the lateral direction, and is emitted from the LED chip 13. Of these, the light directed toward the auxiliary reflecting portion 41 has a high reflectivity because the auxiliary reflecting portion 41 is set to have a smaller curvature than the curvature of other portions of the reflecting surface 23, so that the auxiliary optical portion 41 causes the main optical axis It is converted into reflected light α2 that is positively reflected in the direction along B.

In the luminaire 40 of the second embodiment, the light emitted from the LED chip 13 is emitted in a direction intersecting the axis C of the reflecting plate 15, and the light emitted from the LED chip 13 to the side is supplemented. The light is converted into reflected light α2 in the direction along the main optical axis B by the reflecting portion 41.
Therefore, in the lighting fixture 40 of 2nd Embodiment, the light radiate | emitted from the LED chip 13 can be utilized without waste.

(Third embodiment)
Next, the lighting fixture of 3rd Embodiment of this invention is demonstrated.
As shown in FIGS. 6 and 7, in the lighting fixture 50 according to the third embodiment of the present invention, a polarizing surface 51 is formed by finely processing the outer surface of the diffusion convex portion 27 in the diffusion cover 18. The polarization plane 51 may be formed on the inner surface of the diffusion convex portion 27 instead of the outer surface of the diffusion convex portion 27, or may be formed on the outer surface and the inner surface of the diffusion convex portion 27.

  In the lighting device 50, the light emitted from the LED chip 13 travels toward the diffusion cover 18 and is incident on the inner surface of the diffusion convex portion 27, and then is polarized by the polarization plane 51 on the outer surface of the diffusion convex portion 27. Thus, the light is converted into polarized light α3 emitted in the direction different from the incident direction toward the outside of the diffusing convex portion 27. At this time, since the polarized light α3 created by the polarization plane 51 is positively directed in the lateral direction different from the incident direction, a wide irradiation range 200 near the ceiling surface 103 with respect to the wall surface 102 by the polarization light α3. It is formed.

In the luminaire 50 according to the third embodiment, the light emitted from the LED chip 13 is emitted in a direction different from the incident direction due to the refractive property of the polarization plane 51 included in the diffusion convex portion 27 of the diffusion cover 18.
Therefore, in the lighting fixture 50 of 3rd Embodiment, when the light radiate | emitted from the LED chip 13 actively turns to the horizontal direction, the wide range illumination which increases the brightness feeling of space can be performed with little energy. .

  The LED package 11, the substrate 12, the LED chip 13, the instrument body 14 and the like used in the first embodiment, the second embodiment, and the third embodiment are not limited to those illustrated, and can be appropriately changed. is there.

10, 40, 50 Lighting fixture 11 LED package 12 Substrate 13 LED chip 15 Reflector 16 First opening 17 Second opening 18 Diffusion cover 29 Unevenness

Claims (3)

  1. An LED package having an LED chip mounted on a substrate;
    A substantially bowl-shaped reflector provided with a first opening through which the LED chip is exposed and a second opening through which light emitted from the LED chip is irradiated;
    A substantially dome-shaped diffusion cover provided to cover the LED chip and projecting from the first opening into the reflector;
    A lighting fixture provided with at least one of an inner surface and an outer surface of the diffusion cover, and unevenness for diffusing light from the LED chip.
  2. The LED package is oriented so that the main optical axis of light emitted from the LED chip intersects the axis of the reflector,
    An auxiliary reflecting portion for reflecting light emitted from the LED chip in a lateral direction in a direction along the main optical axis is provided on the first opening side of the reflecting plate,
    The lighting fixture according to claim 1, wherein the auxiliary reflection portion has a spherical radius of curvature smaller than other portions of the reflection plate.
  3.   The lighting fixture according to claim 1, wherein the diffusing cover has a refractive property for emitting the light in a direction different from an incident direction.
JP2009289565A 2009-12-21 2009-12-21 Lighting fixture Pending JP2011129473A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2009289565A JP2011129473A (en) 2009-12-21 2009-12-21 Lighting fixture

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2009289565A JP2011129473A (en) 2009-12-21 2009-12-21 Lighting fixture
CN2010106030638A CN102121590A (en) 2009-12-21 2010-12-21 Lighting appliance

Publications (1)

Publication Number Publication Date
JP2011129473A true JP2011129473A (en) 2011-06-30

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Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2014013706A (en) * 2012-07-04 2014-01-23 Panasonic Corp Luminaire
WO2014025134A1 (en) * 2012-08-09 2014-02-13 주식회사 포스코엘이디 Led lighting apparatus
JP2014232660A (en) * 2013-05-29 2014-12-11 三菱電機株式会社 Lighting device
JP2014239008A (en) * 2013-06-10 2014-12-18 国分電機株式会社 Lighting fixture
JP2016004663A (en) * 2014-06-16 2016-01-12 パナソニックIpマネジメント株式会社 Lighting device
WO2016031943A1 (en) * 2014-08-28 2016-03-03 株式会社モデュレックス Lighting-device body and lighting device
JP2018063961A (en) * 2018-01-29 2018-04-19 三菱電機株式会社 Light device
JP2019040888A (en) * 2018-12-13 2019-03-14 コイズミ照明株式会社 Lighting instrument

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102287646A (en) * 2011-08-01 2011-12-21 深圳市众明半导体照明有限公司 Improve the light efficiency and light efficiency led lights method for improving
CN104791643B (en) * 2015-03-10 2017-09-12 陈琦 A kind of desk lamp module

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JPH0512906A (en) * 1991-06-28 1993-01-22 Toto Ltd Lighting fixture
JP2003045205A (en) * 2001-07-31 2003-02-14 Mitsuboshi Denki Seisakusho:Kk Downlight
JP2004179048A (en) * 2002-11-28 2004-06-24 Toshiba Lighting & Technology Corp Led lighting unit and led lighting device
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JP2009521782A (en) * 2005-12-21 2009-06-04 スリーエム イノベイティブ プロパティズ カンパニー LED light emitter with radial prism light deflector
JP2009266780A (en) * 2008-04-30 2009-11-12 Toshiba Lighting & Technology Corp Luminous body and luminaire

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JP4894600B2 (en) * 2007-04-24 2012-03-14 パナソニック電工株式会社 lighting equipment
CN201145213Y (en) * 2008-01-22 2008-11-05 杰 史 Anti-dazzle LED illuminating apparatus
CN201262362Y (en) * 2008-09-08 2009-06-24 龙国庆 Anti-dazzle structure of LED lamp and anti-dazzle LED lighting device

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JPS6451204U (en) * 1987-09-24 1989-03-29
JPH0512906A (en) * 1991-06-28 1993-01-22 Toto Ltd Lighting fixture
JP2003045205A (en) * 2001-07-31 2003-02-14 Mitsuboshi Denki Seisakusho:Kk Downlight
JP2004179048A (en) * 2002-11-28 2004-06-24 Toshiba Lighting & Technology Corp Led lighting unit and led lighting device
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JP2009521782A (en) * 2005-12-21 2009-06-04 スリーエム イノベイティブ プロパティズ カンパニー LED light emitter with radial prism light deflector
JP2009266780A (en) * 2008-04-30 2009-11-12 Toshiba Lighting & Technology Corp Luminous body and luminaire

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2014013706A (en) * 2012-07-04 2014-01-23 Panasonic Corp Luminaire
WO2014025134A1 (en) * 2012-08-09 2014-02-13 주식회사 포스코엘이디 Led lighting apparatus
JP2014232660A (en) * 2013-05-29 2014-12-11 三菱電機株式会社 Lighting device
JP2014239008A (en) * 2013-06-10 2014-12-18 国分電機株式会社 Lighting fixture
JP2016004663A (en) * 2014-06-16 2016-01-12 パナソニックIpマネジメント株式会社 Lighting device
WO2016031943A1 (en) * 2014-08-28 2016-03-03 株式会社モデュレックス Lighting-device body and lighting device
JP6063099B2 (en) * 2014-08-28 2017-01-18 株式会社モデュレックス Lighting fixture body and lighting fixture
EP3196540A4 (en) * 2014-08-28 2018-03-28 Modulex Inc. Lighting-device body and lighting device
US10359162B2 (en) 2014-08-28 2019-07-23 Modulex Inc. Lighting device with off-axis reflector and light source
JP2018063961A (en) * 2018-01-29 2018-04-19 三菱電機株式会社 Light device
JP2019040888A (en) * 2018-12-13 2019-03-14 コイズミ照明株式会社 Lighting instrument

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