JP2012004080A - Lighting fixture - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a lighting fixture capable of reducing glare without impairing fixture efficiency.SOLUTION: The lighting fixture 10 is provided with an LED package 13, a reflecting plate 14 placed in front of the LED package 13, and a cover 15 placed in front of the LED package 13. The cover 15 has a reflection face 25 in its center in front of the LED package 13 for reflecting the light from the LED package 13 to the reflecting plate 14.

Description

  The present invention relates to a lighting fixture applied to a downlight or the like embedded in a ceiling surface using an LED package as a light source.

  2. Description of the Related Art Conventionally, there has been known a lighting fixture provided with a chromaticity adjustment member that is a filter for adjusting the chromaticity of illumination light by absorbing light in a predetermined wavelength region in the light irradiation direction of the LED package (for example, , See Patent Document 1).

JP 2010-44874 A (FIG. 4, claim 1)

The light emitting diode included in the LED package has a high light directivity, a high luminance, and a low solid angle light source. Therefore, the light-emitting diode itself is dazzling, so that the user's eyes are dazzling and not good. On the other hand, when a cap or the like is attached to prevent glare of the light emitting diode, the efficiency of the instrument is reduced by the cap.
The lighting fixture described in Patent Document 1 described above can adjust the chromaticity of the illumination light by absorbing light in a predetermined wavelength region from the LED package by the chromaticity adjusting member.
However, although the lighting fixture described in Patent Document 1 described above can suppress variations in chromaticity, it cannot reduce glare without reducing fixture efficiency.

  The present invention has been made to solve the above-described problems, and an object of the present invention is to provide a lighting apparatus that can reduce glare without reducing the efficiency of the apparatus.

  A luminaire according to the present invention includes an LED package, a reflector disposed in front of the LED package, and a cover disposed in front of the LED package, and the cover is arranged at the front central portion of the LED package. A reflection surface is provided for reflecting light from the reflection plate to the reflection plate.

  In the lighting fixture according to the present invention, the reflecting surface has a convex shape or a concave shape with respect to the LED package.

  According to the lighting fixture concerning this invention, there exists an effect that glare can be reduced, without reducing fixture efficiency.

The external appearance perspective view seen from diagonally downward of the lighting fixture of 1st Embodiment which concerns on this invention The partially broken perspective view of the principal part of the lighting fixture of FIG. Vertical sectional view of the luminaire of FIG. The vertical sectional view of the lighting fixture of a 2nd embodiment concerning the present invention.

Hereinafter, the lighting fixture of several embodiment which concerns on this invention is demonstrated with reference to drawings.
(First embodiment)
The lighting fixture 10 according to the first embodiment of the present invention includes a fixture main body 11, a frame 12, a plurality of LED packages 13 accommodated in the fixture main body 11, and a plurality of LED packages 13 disposed in front of each of the LED packages 13. The downlight is provided with a reflector 14 and a cover 15 disposed in front of the LED package 13 and is embedded in a mounting hole (not shown) provided on a ceiling surface (not shown).

  As shown in FIG. 1, the instrument body 11 is formed in a substantially cylindrical shape with a top plate using a hard resin material having insulating properties. A power supply device (not shown) is attached to the upper portion of the instrument main body 11, and a power terminal block 16 electrically connected to the power supply apparatus is attached to the side of the instrument main body 11. The power supply device is electrically connected to a printed circuit (not shown) formed on an LED substrate (see FIG. 2) 17 included in the LED package 13. One of the power terminal blocks 16 is electrically connected to an external power supply circuit, and the other is electrically connected to the power supply device.

  The frame 12 is formed in a cylindrical shape using a resin material or the like equivalent to the instrument body 11 and is screwed to the front of the instrument body 11. The frame 12 has a flange 18 in contact with the lower surface of the ceiling surface at the lower end portion, and a plurality of metal attachment springs 19 are attached to the outer peripheral portion. The attachment spring 19 supports the appliance body 11 on the ceiling surface by being elastically restored in the horizontal direction after the appliance body 11 is inserted into the attachment hole of the ceiling surface and being locked to the upper surface of the ceiling surface. The frame 12 has a frame-side reflecting surface 20 on its inner peripheral surface.

  As shown in FIG. 2, the LED package 13 is mounted at a predetermined position on the lower surface of the circular LED substrate 17. The LED substrate 17 is attached to the lower end surface of the instrument body 11. The reflecting plate 14 is formed in a substantially hemispherical shape with a top portion cut off at a predetermined position corresponding to the LED package 13 in the reflecting plate forming member 21 having a circular outer shape. A plurality of reflectors 14 are arranged such that the top opening 22 surrounds each LED package 13.

  The cover 15 is made of a light-transmitting, for example, white or milky white resin with a small thickness, and is attached to the front of the reflecting plate forming member 21 via a frame 12. In the cover 15, a central reflecting portion 24 is formed on the upper surface of the cover main body 23 formed in a disk shape at a position in front of each LED package 13, that is, a position corresponding to the center of each optical axis of the LED package 13. Has been. The central reflection part 24 is formed in a convex conical shape with respect to the LED package 13 and has a reflection surface 25 on the outer surface. The reflecting surface 25 has an optical characteristic that totally reflects light from the LED package 13.

Next, the optical characteristics of the lighting fixture 10 will be described.
As shown in FIG. 3, in the lighting fixture 10, the commercial power supply is supplied from the external power supply circuit to the power supply terminal block 16, whereby the LED package driving current flows from the power supply device to the LED substrate 17, and the LED package 13 emits light. The The light from the LED package 13 travels toward the cover body 23 at the side of the central reflecting portion 24 and travels toward the central reflecting portion 24 as indicated by a broken line in FIG. The light traveling toward the cover body 23 passes through the cover body 23 and is irradiated toward the floor surface. The light traveling toward the central reflecting portion 24 is reflected by the reflecting surface 25 of the central reflecting portion 24 to become reflected light and travels toward the reflecting plate 14 of the reflecting plate forming member 21. The reflected light traveling toward the reflecting plate 14 is reflected by the reflecting plate 14 and becomes reflected light, which is transmitted through the cover main body 23 and irradiated toward the floor surface. Therefore, the light at the center of the optical axis of the LED package 13 is reflected by the reflecting surface 25 of the central reflecting portion 24 and the reflecting plate 14 of the reflecting plate forming member 21 without passing through the cover body 23 and being irradiated toward the floor surface. After that, the floor surface is irradiated through the cover main body 23.

Therefore, in the lighting fixture 10 of the first embodiment, the light at the center of the optical axis of the LED package 13 is not directly transmitted through the cover main body 23 of the cover 15 by the reflecting surface 25 provided in the central reflecting portion 24 of the cover 15.
Thereby, in the lighting fixture 10 of this 1st Embodiment, since the light from the LED package 13 does not become dazzling light and a user's eyes are not dazzled, glare can be reduced.

Moreover, in the lighting fixture 10 of this 1st Embodiment, the cover 15 does not block light like the cap for preventing the glare by the light of a light emitting diode.
Thereby, in the lighting fixture 10 of this 1st Embodiment, fixture efficiency does not fall.

And in the lighting fixture 10 of this 1st Embodiment, the reflective surface 25 which the center reflection part 24 has is formed in convex shape with respect to the LED package 13. As shown in FIG.
Thereby, in the lighting fixture 10 of this 1st Embodiment, since it can produce similarly to the conventional cover by changing the metal mold | die which shape | molds the cover 15 slightly, it can be advantageous in terms of cost.

(Second Embodiment)
Next, the lighting fixture of 2nd Embodiment which concerns on this invention is demonstrated. Note that, in the following second embodiment, the same or equivalent components in the drawing are simplified or described for the same components or functionally similar components as those in the first embodiment described above. Omitted.

  As shown in FIG. 4, a cover 33 provided with a central reflecting portion 32 having a concave reflecting surface 31 with respect to the LED package 13 is applied to the lighting fixture 30 of the second embodiment according to the present invention. The central reflecting portion 32 is formed in a cylindrical shape, and the reflecting surface 31 is cut out in a substantially hemispherical shape at the central portion of the upper surface of the central reflecting portion 32, and optically reflects the light from the LED package 13 totally. Has characteristics.

  In the luminaire 30, the light from the LED package 13 that has traveled toward the cover body 34 passes through the cover body 34 at the side of the central reflecting portion 32 and is irradiated toward the floor surface. The light traveling toward the central reflecting portion 32 is reflected by the reflecting surface 31 of the central reflecting portion 32 to become reflected light and travels toward the reflecting plate 14 of the reflecting plate forming member 21. The reflected light that has traveled toward the reflecting plate 14 is reflected by the reflecting plate 14 and becomes reflected light that passes through the cover body 34 and is irradiated toward the floor surface. Therefore, the light at the center of the optical axis of the LED package 13 is reflected by the reflecting surface 31 of the central reflecting portion 32 and the reflecting plate 14 of the reflecting plate forming member 21 without being transmitted to the floor surface through the cover body 34. After that, the floor surface is irradiated through the cover main body 34.

Therefore, in the lighting fixture 30 of the second embodiment, the reflecting surface 31 included in the central reflecting portion 32 is formed in a concave shape with respect to the LED package 13.
Thereby, in the lighting fixture 30 of this 2nd Embodiment, since it can produce similarly to the conventional cover only by changing the metal mold | die which shape | molds the cover 15, it can be advantageous in terms of cost.

  In addition, the instrument main body, the frame, the LED package, the reflector, the power terminal block, and the like exemplified in the first embodiment and the second embodiment are not limited to those illustrated, and can be appropriately changed.

DESCRIPTION OF SYMBOLS 10,30 Lighting fixture 13 LED package 14 Reflector 15,33 Cover 25,31 Reflecting surface

Claims (2)

An LED package;
A reflector disposed in front of the LED package;
A cover disposed in front of the LED package;
The said cover is a lighting fixture which provides the reflective surface for reflecting the light from the said LED package to the said reflecting plate in the center part ahead of the said LED package. The lighting fixture according to claim 1,
The said reflecting surface is a lighting fixture which is convex shape or concave shape with respect to the said LED package.

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