JP2011171236A - Luminaire - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a luminaire with a reduced contrast of lightness and darkness and a low unevenness in illuminance. <P>SOLUTION: The luminaire includes a plurality of LED packages 122, a mounted substrate 121 on which the LED package 122 are mounted, reflector plates 14 which are each combined with the LED packages 122, a housing which accommodates the LED packages 122, the mounted substrate 121, and the reflector plates 14, and a cone part which is placed in the light emission side of the housing 11 and includes an inner diameter that increases with an increasing distance from the housing 11, in which the plurality of LED packages are divided into central LED packages placed in the almost central area of the mounted substrate and peripheral LED packages placed in the peripheral area of the mounted substrate, and the shape of the verge of an opening is formed so that the reflector plates combined with the peripheral LED packages are near the LED packages in a side 14c closer to the central area of the mounted substrate and far from the LED packages in a side 14s farther from the central area of the mounted substrate. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

The present invention relates to a luminaire, and more particularly to a luminaire that includes a light-emitting element such as an LED (light-emitting diode) element as a light source and a reflector.
It relates to lighting equipment.

  As an illuminating device that replaces an incandescent lamp, an illuminating device using an LED (light emitting diode) element as a light source has been used (for example, Patent Document 1). In the downlight using the LED element of Patent Document 1, by using a reflecting member such as a reflector, the emitted light from the LED element is made into an inverted heart-shaped orientation curve, thereby causing uneven illumination and uneven color on the irradiated surface. Is trying to eliminate.

JP 2009-187773 JP

  In this lighting fixture, the shape of the opening edge of the reflecting member is disclosed as a circle, but in this case, the interval between the opening edges of the reflecting plate is too wide in the peripheral portion, and the cone portion or the expanding portion (etc. When the frame portion is provided, a contrast between light and dark is likely to occur, which may cause unevenness.

  This invention is made | formed in view of the said situation, and it aims at providing the lighting fixture which reduces contrast of light and dark and has few illumination intensity irregularities.

In order to solve the above-described problem, a lighting fixture of the present invention includes a plurality of LED packages, a mounting substrate on which the LED packages are mounted, and a reflective portion disposed for each LED package, and the reflective portion is the outermost periphery. The portion is characterized by having a shape that spreads outward.
Further, the present invention, in the above luminaire, has a spreading portion that expands away from the reflecting portion outside the reflecting portion of the outermost peripheral portion, the reflecting portion of the outermost peripheral portion is the center of the LED package of the outermost peripheral portion, It is formed so that the line segment connecting the opening edges of the reflection part at the outermost peripheral part does not intersect the spread part.
Moreover, the lighting fixture of the present invention includes a plurality of LED packages, a mounting substrate on which the LED packages are mounted, a reflecting plate combined for each LED package, a housing that houses the LED package, the mounting substrate, and the reflecting plate, A cone portion that is provided on the light emitting side of the housing and has an inner diameter that increases as the distance from the housing increases. The reflecting plate combined with the peripheral LED package is close to the LED package on the side close to the center of the mounting substrate. The LED package is formed so as to be far from the LED package on the side far from the center of the LED package.
Further, according to the present invention, in the above luminaire, a line segment connecting the center of the peripheral LED package and the opening edge of the combined reflector is prevented from intersecting the cone portion.

  According to this configuration, it is possible to reduce unevenness of the spread portion (frame portion) attached to the outside of the reflection portion while securing the illuminance directly below the lighting fixture. That is, the reflection part combined with the peripheral LED package is formed so that the shape of the opening edge is close to the LED package on the side close to the center part of the mounting board and far from the LED package on the side far from the center part of the mounting board. Has been. Therefore, compared with the case where the shape of the opening edge of the reflection part is all a circle, the distance between the opening edges of the reflection part is not excessively wide in the peripheral part, and a contrast of light and dark is added when an extension part such as a cone part is provided. It is difficult and unevenness can be reduced.

Sectional drawing which shows the lighting fixture of Embodiment 1 The perspective view of the lighting fixture of Embodiment 1 Sectional sectional view of the main part of the lighting apparatus of the first embodiment The principal part explanatory perspective view which shows the lighting fixture of Embodiment 1 Sectional drawing which shows the principal part which shows the lighting fixture of Embodiment 1. Cross-sectional explanatory drawing of the main part showing the lighting apparatus of the second embodiment. Sectional drawing of the principal part of the lighting fixture of Embodiment 2

(Embodiment 1)
FIG. 1 is a cross-sectional view showing a schematic configuration of an LED lighting apparatus according to Embodiment 1 of the present invention.
The LED lighting apparatus 1 according to the present embodiment constitutes a downlight that is embedded in a ceiling and attached in, for example, a hotel or a luxury restaurant. As shown in FIG. 1, the configuration includes a housing 11, an LED unit 12, a front panel 13, a reflection plate 14, and a power supply unit 15 that constitute a main body. Here, the LED unit 12 is formed by mounting four LED packages 122 on a mounting substrate 121. The reflecting plate 14 has a small-diameter opening 141 facing each of the LED packages 122, a reflecting surface 143 formed so as to gradually increase from the small-diameter opening 141, and a connecting surface portion 144 that continuously connects the reflecting surfaces 143. And the connecting surface 144 has a hole 145. The downlight accommodates a plurality of LED packages 122, a mounting substrate 121 on which the LED packages 122 are mounted, a reflecting plate 14 that is combined for each LED package, and the LED package 122, the mounting substrate 121, and the reflecting plate 14. And a cone portion 16 that is provided on the light emission side of the housing 11 and has an inner diameter that increases as the distance from the housing 11 increases. The central LED package to be arranged and the peripheral LED package to be arranged around the mounting substrate are divided, and the reflector combined with the peripheral LED package has an opening edge shape in the center of the mounting substrate. The side closer to the LED package is closer to the LED package, and the side farther from the center of the mounting substrate is farther from the LED package. It is formed.

  Since the housing 11 also serves as a heat radiating member that releases the heat generated by the LED unit 12 to the outside, the housing 11 is formed in a substantially cylindrical shape by aluminum die casting or the like having excellent heat radiating properties, and the edge of the embedded hole constricted in the ceiling The cone portion 16 that also serves as a frame for locking to the portion is integrated at the lower end portion. A power supply unit 15 for driving the LED unit 12 is housed in the housing 11. The power supply unit 15 may be installed outside the housing 11.

  In the LED unit 12, a high-luminance LED element is disposed as an LED package 122 on the surface of the substrate 121 formed in a substantially disc shape on which a conductor pattern (not shown) is formed, for example, by flip chip mounting. The The mounting substrate 121 is installed with the back surface on which the plurality of LED packages 122 are not mounted being brought into surface contact with the lower surface of the housing 11. In addition, the LED unit 12 may be attached to the lower surface of the housing 11 through a heat dissipation sheet for the purpose of reducing thermal resistance.

  The front panel 13 is formed in a substantially disc shape with acrylic resin or polycarbonate resin having translucency and insulation.

  Further, the front panel 13 has a function of preventing dust from adhering to the surface of the LED element 122 and protecting the LED element 122 from static electricity.

  The reflection plate 14 is formed in a substantially disk shape by, for example, extrusion molding of PBT (polybutylene terephthalate) resin, and has a small diameter opening at a position corresponding to the LED element 122 mounted on the substrate 121 as shown in FIGS. 141 and a large-diameter opening 142 are provided, and a space therebetween is formed in a bowl shape. The reflection plate 14 is mounted on the main body using screw holes arranged around the reflection plate 14. FIG. 3 is a fragmentary sectional view, FIG. 4 is a fragmentary perspective view, and FIG. 5 is a fragmentary sectional view showing the lighting apparatus of the first embodiment.

  The reason why the small-diameter opening 141 of the reflecting plate 14 is recessed is to improve the design, and normally, an inconspicuous color, for example, white or black that approximates the color of the ceiling is used. Further, when it is desired to suppress the luminance of the ceiling surface, the reflection or diffusion of light is suppressed as a black or silver finish. In the present embodiment, the cone portion 16 which also serves as a frame bears a part of its function. Furthermore, depending on the product, the large-diameter opening 142 may not be provided by forming the small-diameter opening 141 larger.

  In FIG. 1, when the LED lighting apparatus 1 of the present embodiment is turned on, as shown in FIGS. 3 to 5, the emitted light from the LED element 122 passes through the front panel 13, most of which directly Is reflected in the region from the small-diameter opening 141 toward the large-diameter opening 142 of the reflecting plate 14 and is radiated vertically downward.

  As described above, according to the LED lighting apparatus according to Embodiment 1 of the present invention, the reflector combined with the peripheral LED package has an opening edge shape closer to the center of the mounting substrate. 14c is close to the LED package, and the side 14s far from the center of the mounting board is far from the LED package, so that the reflection plate is reflected at the peripheral portion compared to the case where the shape of the opening edge of the reflector is all circular. The interval between the opening edges of the plate is not excessively widened, and when the cone portion is provided, contrast between light and dark is not easily applied, and unevenness can be reduced.

  In the first embodiment, the configuration in which twelve LED elements are arranged has been described. However, the number is not limited, and it can be applied to a lighting apparatus having a plurality of LED elements. Not too long.

(Embodiment 2)
6 and 7 are a cross-sectional explanatory view and a main part cross-sectional view showing a schematic configuration of the LED lighting apparatus according to Embodiment 2 of the present invention. In addition, about the structure shown in Embodiment 1, the same code | symbol is attached | subjected and description is abbreviate | omitted or abbreviate | omitted.

In FIG. 7, the principal part expanded sectional view of the reflecting plate of the LED lighting fixture 2 of this Embodiment is shown. A range indicated by θ in FIG. 6 is an area where the direct light from the LED is radiated, and is a zone having the largest amount of light. By configuring the θ area so that it does not cover the cone area, the amount of light reaching the cone portion is reduced, and the intensity (unevenness) of light becomes difficult to recognize at the cone portion.
In addition, by reflecting the reflector with aluminum vapor deposition, etc., reducing diffuse reflection and increasing the regular reflection component, the reflected light from the reflector is less likely to hit the cone, further increasing the effect and reducing illuminance unevenness. it can.
Others are the same as in the first embodiment.

  Since the line segment connecting the center of the peripheral LED package and the opening edge of the combined reflector is not intersected with the cone portion in this way, the light from the peripheral LED package is not blocked by the cone portion, and the output efficiency Will improve.

  Here, the manufacturing method of the reflector 14 comprised in this way is demonstrated.

  First, the whole including the small-diameter opening (translucent portion) 141 and the large-diameter opening 142 is integrally formed using a translucent resin such as an acrylic resin or a polycarbonate resin.

  Next, after masking a portion corresponding to the small-diameter opening 141 which is a light transmitting portion, the entire surface is vapor-deposited with a metal having a high reflectance such as aluminum, or white coating is applied, and then the masking is removed.

  The production of the reflector 14 is not limited to the above method. For example, the reflector 14 in the first embodiment is produced using a resin containing a white metal such as titanium having a high reflectance, The small diameter opening 141 may be integrated with a light-transmitting portion that has been previously manufactured by molding an acrylic resin by insert molding.

In addition, as another manufacturing method, a light-transmitting portion that has been manufactured in advance by molding an acrylic resin is fitted into the small-diameter opening 141, or press-fitted to the reflector 14 in the first embodiment, regardless of insert molding. It is also possible to integrate them.
The shape of the reflector can also be selected as appropriate.

  In Embodiments 1 and 2, the lighting fixture having the cone portion 16 has been described. However, the present invention is not limited to this, and instead of the cone portion 16, a cylindrical frame portion is provided at the opening of the lighting fixture. It is also effective for

DESCRIPTION OF SYMBOLS 1 LED lighting fixture 11 Housing | casing 12 LED unit 121 Board | substrate 122 LED package 13 Front panel 14 Reflector 14c The side near the center part of a mounting board (the reflector)
14s The side far from the center of the mounting board (the reflector)
141 Small-diameter opening 142 Large-diameter opening 143 Reflecting surface 144 Connecting surface portion 145 Hole portion 15 Power supply unit 16 Cone portion

Claims (4)

A plurality of LED packages;
A mounting substrate on which the LED package is mounted;
A lighting device including a reflective portion disposed for each of the LED packages,
The said reflection part is a lighting fixture which makes the shape which spreads outside in the outermost periphery part. The lighting fixture according to claim 1,
And having a spreading part that spreads with increasing distance from the reflecting part outside the reflecting part of the outermost peripheral part,
The reflective part of the outermost peripheral part is a luminaire formed such that a line segment connecting the center of the LED package of the outermost peripheral part and the opening edge of the reflective part does not intersect with the spread part. A plurality of LED packages;
A mounting substrate on which the LED package is mounted;
A reflector combined for each LED package;
A housing for housing the LED package, the mounting substrate, and the reflector;
A lighting device having a cone portion that is provided on a light emitting side of the housing and has an inner diameter that increases with distance from the housing, wherein the plurality of LED packages are arranged at a substantially center of the mounting substrate. LED package,
It is divided into peripheral LED packages arranged around the mounting substrate,
In the reflector combined with the peripheral LED package, the shape of the opening edge is close to the LED package on the side close to the central part of the mounting substrate, and far from the LED package on the side far from the central part of the mounting substrate. A luminaire shaped like this. The lighting apparatus according to claim 3,
A luminaire in which a line segment connecting the center of the peripheral LED package and the opening edge of the combined reflector does not intersect the cone portion.

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