KR20120037880A - Lighting fixture - Google Patents

Abstract

PURPOSE: A lighting apparatus is provided to arrange a uniform image of light emitted from a plurality of LEDs while suppressing a temperature increase of a light emitting device using a simple configuration. CONSTITUTION: A main body includes a concave part and an opening part for arranging a lighting device and a mounting part. The lighting device comprises a circuit board and circuit components mounted on the circuit board. A light source part(2) comprises a substrate(21) and a plurality of light emitting devices(22) mounted on the substrate. A white resist layer which is performed as a reflecting layer is formed on the surface of the substrate. The substrate is made of a ceramic material or a plastic material.

Description

Lighting fixtures {LIGHTING FIXTURE}

Embodiment of this invention relates to the lighting fixture using light emitting elements, such as LED, as a light source.

In a luminaire for a general house, an annular fluorescent lamp is used as the main light source, and a cover member (shade) is provided to cover the lower side of the annular fluorescent lamp, and the exterior shape is formed in a round shape. It is prevalent.

In recent years, with high output, high efficiency, and widespread use of light emitting devices such as LEDs, lighting fixtures for general houses such as those which can be expected to have a long life using light emitting devices as light sources have been developed.

On the other hand, as the temperature of the light emitting elements such as LEDs increases, the output of light decreases, and the useful life thereof also becomes short. For this reason, in the lighting fixture which uses solid light emitting elements, such as LED and an EL element as a light source, in order to increase the useful life or to improve characteristics, such as luminous efficiency, it is necessary to suppress the temperature rise of a light emitting element.

Conventionally, as a lighting fixture for general houses using LED as a light source, for example, a lighting device for lighting the LED is controlled around a mounting portion of a ceiling mount kit provided on a ceiling surface, and a plurality of lighting devices are provided on the outer periphery of the lighting device. Some LEDs are arranged. This LED is arrange | positioned so that light may be radiate toward the outer peripheral side of a horizontal direction, and it reflects the emitted light by the reflecting plate provided in the ceiling surface side, and irradiates it to the front side.

Sharp / LED ceiling light [October 5, 2010 search] (http://www.sharp.co.jp/corporate/news/100819-a-2.html)

However, in the above-described conventional lighting device, since the light from the LED emitted in the lateral direction is reflected and irradiated to the front side, its configuration may be complicated. In addition, since the LED is configured to be arranged in the vicinity of the lighting device, heat generated from the LED and heat generated from the lighting device may interfere with each other, and the heat may cause the temperature rise of the LED.

This invention is made | formed in view of the said subject, Comprising: It aims at providing the illuminating device which is easy to suppress the temperature rise of a light emitting element, and can uniformize the image of the light emitted from a light emitting element with a simplified structure.

An illuminating device according to an embodiment of the present invention includes: an apparatus main body; a substrate having a mounting surface facing the front side and disposed on the apparatus main body; a substantially concentric circumference mounted on the substrate and having a different radius. ), Or a plurality of columns arranged on the periphery of polygons of different sizes and approximately the same center, and arranged in the circumferential direction between adjacent columns, the same number of light emission An element is provided.

According to the embodiment of the present invention, it is possible to simplify the configuration, to provide a heat dissipation structure that can be easily configured, and to provide a lighting apparatus capable of uniformizing the image of light emitted from the plurality of light emitting elements.

1 is a perspective view showing a lighting apparatus according to a first embodiment of the present invention.
FIG. 2 is a cross-sectional view of the lighting fixture of FIG. 1. FIG.
FIG. 3 is a plan view showing the lighting apparatus of FIG. 1 as viewed from below. FIG.
4 is a plan view illustrating a light source unit in the luminaire of FIG. 1.
It is a top view which shows the light source part by 2nd Embodiment of this invention.

EMBODIMENT OF THE INVENTION Hereinafter, 1st Embodiment of this invention is described with reference to FIGS. In each figure, the wiring connection relationship by a lead wire etc. is abbreviate | omitted and shown. In addition, the same code | symbol is attached | subjected to the same part and the overlapping description is abbreviate | omitted.

The luminaire of this embodiment is a type attached to and used by a sealing mounting body as a wiring mechanism provided on a fixture mounting surface, and radiates from a light source unit having a plurality of light emitting elements arranged in a plurality of rows on a circumference. Lighting of the room is performed by light.

1 to 3, the lighting apparatus includes a main body 1, a light source unit 2, a lighting device 3, a mounting unit 4, a cover member 5, and a reflecting plate 6. Doing. Moreover, the adapter A connected electrically and mechanically to the sealing mounting body Cb provided in the ceiling surface C as a mechanism mounting surface is provided. Such a lighting fixture is formed in a circular circular appearance, and the front side is used as the irradiation surface of light, and the back side is used as the mounting surface to the ceiling surface C. FIG.

As representatively shown in FIG. 2, the main body 1 is formed in circular shape from the flat plate of metal materials, such as a cold rolled steel plate, and arrange | positions the lighting apparatus 3 and the mounting part 4 mentioned later in the substantially center part. A circular recess 11 and an opening 12 are formed for this purpose.

As described with reference to FIG. 4, the light source unit 2 includes a substrate 21 and a plurality of light emitting elements 22 mounted on the substrate 21. The board | substrate 21 has predetermined width dimension, is formed in substantially circle shape, consists of a flat plate of glass epoxy resin which is an insulating material, and the wiring pattern is formed in the surface side by copper foil. Further, a white resist layer serving as a reflective layer is provided on the wiring pattern, that is, on the surface of the substrate 21. In addition, when the material of the board | substrate 21 is used as an insulating material, a ceramic material or a synthetic resin material can be applied. Moreover, when it is made from metal, the metal base board in which the insulating layer was laminated | stacked on one side of the base board which is excellent in heat conductivity and excellent heat dissipation, such as aluminum, can be applied.

The light emitting element 22 is an LED and is a surface mount LED package. The LED package is mounted along a circumferential direction of the plurality of circle-shaped substrates 21 in two rows, in this embodiment, in two rows on the inner circumferential side and the outer circumferential side. Each LED package adjacent to the circumferential direction is arranged on the circumference at substantially equal intervals, and a plurality of, in particular, 44 are mounted in the same number in two rows on the inner circumference side and the outer circumference side.

In addition, each LED package in the column on the inner circumferential side and the outer circumferential side is arranged so as to be offset so as not to overlap each other in the circumferential direction (shown as d in FIG. 4). More specifically, the LED package of the other row (for example, the column on the outer circumference) is located at approximately the center of the separation distance of each LED package adjacent to the circumferential direction of one row (for example, the row on the inner circumference side). The LED packages of one row are arrange | positioned at the substantially center part of the separation distance of each LED package adjacent to the circumferential direction of the other row, and this has a mutual arrangement relationship continuous in the circumferential direction.

That is, 44 columns of light emitting elements 22 are arranged in a plurality of rows (two rows) on circumferences of substantially concentric circles having different radii, and are arranged in adjacent columns (columns on the inner and outer circumferences). Are offset in the circumferential direction and are arranged in a zigzag shape between the adjacent columns.

In this way, since the same number of light emitting elements 22 are mounted, the positions of the light emitting elements 22 can be distributed and arranged on the substrate 21 in a balanced manner.

An LED package is comprised with LED chip arrange | positioned generally in the main body formed from ceramics, and translucent resin for molds, such as epoxy resin and silicone resin which seal this LED chip.

The LED chip is a blue LED chip that emits blue light. In the translucent resin, a phosphor is mixed, and a yellow phosphor that emits yellow light having a complementary color relationship with blue light is used so that white light can be emitted.

In addition, LED may be mounted directly on the board | substrate 21, LED may be mounted in shell type | mold, and a mounting method and a form are not specifically limited.

In the light source unit 2 configured as described above, the substrate 21 is positioned around the mounting portion 4 as shown in FIGS. 2 and 3, and the mounting surface of the light emitting element 22 is on the front side, that is, downward. It is arrange | positioned toward the irradiation direction of. In addition, the back surface side of the board | substrate 21 is attached by fixing means, such as a screw, for example so that it may be in intimate contact with the inner surface side of the main body 1. As shown in FIG. Therefore, the board | substrate 21 is thermally couple | bonded with the main body 21, and the heat from the board | substrate 21 is conducted to the main body 21 from the back surface side, and to radiate heat.

As shown in Figs. 2 and 3, the lighting device 3 has a case of a substantially single cylinder shape, a circuit board 31 mounted and housed in the case, and a circuit mounted on the circuit board. It is equipped with parts. The lighting device 3 is disposed and mounted in the recess 11 formed in the center of the main body 1, and the adapter A side is electrically connected to the commercial AC power supply via the adapter A. do. Therefore, the lighting device 3 receives this AC power, generates a DC output, supplies the DC output to the light emitting element 22 through a lead wire, and controls the light emitting element 22 to be lit.

The mounting portion 4 is an adapter guide formed in a substantially cylindrical shape, and a coupling inlet through which the adapter A is inserted and engaged is formed in the center portion of the adapter guide. This adapter guide is arrange | positioned so that the outer peripheral surface may be located in the inner peripheral side in the case of the lighting device 3, In other words, the lighting device 3 is arrange | positioned at the outer peripheral side of the adapter guide. Moreover, the adapter guide passes through the opening 12 of the main body 1, and is extended to the front surface side.

In addition, the mounting part 4 does not necessarily need to be a member referred to as an adapter guide or the like. For example, although the opening formed in the main body 1 or the reflecting plate 6 may be sufficient, in other words, it means the member and the part which the adapter A couple | bonds with it facing the sealing mounting body Cb as a wiring mechanism. Doing.

The cover member 5 is formed of a light-transmissive material such as an acrylic resin, has a milky white color, and has a diffusibility, and has a circular base portion 51 formed in a flat shape, and the base portion. The side edge part 52 extended diagonally from the outer periphery of 51 by the inner peripheral direction is provided. And the cover member 5 is attached to the outer periphery of the main body 1 so that the front surface side of the main body 1 containing the light source part 2 may be covered.

As shown in FIG. 2, the reflecting plate 6 is formed in the circular shape which has the inclined reflecting surface 61 from the flat plate of metal materials, such as a cold rolled steel plate, and operates the adapter A in the substantially center part. An opening is formed. Therefore, a part of light emitted from the light emitting element 22 is reflected by the reflecting surface 61 to the front side, and is used effectively.

The adapter A is electrically and mechanically connected to the sealing mounting body Cb provided on the ceiling surface C by a mounting blade provided on the upper surface side, and has a substantially cylindrical shape. The adapter A is provided on both sides of the main wall. The pair of locking portions A1 are provided so as to protrude to the outer circumferential side at all times by the built-in spring. This locking part A1 is immersed by operating the lever provided in the lower surface side. Moreover, the power supply cord which is not shown in figure connected to the said lighting device 3 is derived from this adapter A, and is connected so that the lighting device 3 and a connector may be connected.

Next, the attachment state to the ceiling surface C of a luminaire is demonstrated. As shown in FIG. 2, the ceiling mounting body C is provided with the sealing mounting body Cb. In addition, the adapter A is electrically and mechanically connected to this sealing mounting body Cb. From this state, as indicated by the arrow on the drawing, the engaging portion A1 of the adapter A can be reliably engaged with the engaging inlet of the adapter guide while aligning the engaging inlet of the adapter guide as the mounting portion 4 with the adapter A. The instrument body is pushed up by hand from below until a mounting operation is performed.

In addition, when removing a mechanism main body, it can remove by removing the cover member 5 and releasing the engagement of the latching part A1 of the adapter A by operating the lever provided in the adapter A. FIG. .

In the state where the lighting device is attached to the ceiling surface C, when electric power is supplied to the lighting device 3, the light emitting element 22 is energized through the substrate 21, and each light emitting element 22 is turned on. . Light emitted from the light emitting element 22 passes through the cover member 5 and is irradiated outward.

In this case, since the light emitting elements 22 are arranged in such a manner as to be offset and distributed in a balanced manner, the luminance unevenness of the light source unit 2 can be reduced, so that the image of the light emitted from the plurality of light emitting elements can be made uniform. .

Moreover, since the board | substrate 21 is located around the mounting part 4, and the mounting surface of the light emitting element 22 is arrange | positioned toward the front side, the structure can be simplified and the heat | fever from the board | substrate 21 is further reduced. The heat dissipation structure for heat dissipation can be made easy. For example, as in the present embodiment, the rear surface side of the substrate 21 is thermally coupled to the main body 1 to easily realize a configuration in which heat from the substrate 21 is conducted to the main body 21 to radiate heat. Can be. This makes it possible to suppress the temperature rise of the light emitting element 22.

In addition, since the lighting device 3 is disposed on the outer circumferential side of the mounting portion 4, the substrate 21 is located around the mounting portion 4, and the rear surface side is thermally coupled to the main body 1. The mutual thermal interference between the heat generated from the lighting device 3 and the heat generated from the light emitting element 22 can be reduced, so that the temperature rise of the light emitting element 22 can be effectively suppressed.

Next, 2nd Embodiment of this invention is described with reference to FIG. FIG. 5 has shown the plane of the light source part 2 similarly to FIG. In addition, the same code | symbol is attached | subjected to 1st Embodiment or an equivalent part, and the overlapping description is abbreviate | omitted.

In this embodiment, the light emitting element 22 is mounted over three columns on the inner circumferential side, the center side, and the outer circumferential side. In each column, each LED package adjacent to the circumferential direction is arranged in the same number in the circumferential direction, leaving a spaced distance of approximately equal intervals.

In addition, each LED package in each adjacent column is offset and arrange | positioned so that they may not overlap in a circumferential direction. That is, each LED package in the column on the inner circumference side and each LED package in the column on the center side are provided with an offset indicated by d1 on the drawing, and each LED package in the column on the center side and each LED package in the column on the outer circumference side is The offset represented by d2 is provided.

Therefore, the light emitting elements 22 of each column number 44 are arranged in a plurality of rows (three rows) on circumferences of substantially concentric circles having different radii, and adjacent columns (columns on the inner circumference side and center side, center) The rows on the side and the outer circumferential side are offset in the circumferential direction.

As described above, in the same manner as in the first embodiment, since the same number of light emitting elements 22 are mounted, the light emitting elements 22 can be arranged on the substrate 21 in a balanced manner by offsetting the positions. The image of the light emitted from the light emitting element can be made uniform.

In addition, this invention is not limited to the structure of each said embodiment, A various deformation | transformation is possible in the range which does not deviate from the summary of invention. For example, the luminaire may be a pendant type suspended from the ceiling or a ceiling embedded type in addition to the direct mounting type mounted directly on the ceiling. Further, the light emitting elements may be arranged on a substrate in a plurality of rows arranged on the periphery of approximately same center polygons of different sizes, and are arranged in the same number of rows with the adjacent rows being offset in the circumferential direction. . Specifically, for example, in the case of mounting the light emitting element on the circumference of the hexagonal polygon, the light emitting elements are arranged on the circumference of the inner hexagon and on the circumference of the outer hexagon, and the light emitting element and the outer side arranged inside This is the case where the light emitting elements listed in the above arrangement are offset in the circumferential direction.

The substrate is preferably formed in a circular circle shape or a hexagonal or octagonal polygonal shape, but is not limited to this shape. In other words, the shape of the substrate is not particularly limited as long as the light emitting element can be arranged on the circumference or the circumference of the polygon. In addition, the board | substrate is formed in multiple numbers, and you may comprise as a whole which combined this.

Moreover, in order to improve the uniformity of the light radiated | emitted from a light source part, you may provide a diffusion lens corresponding to a light emitting element, or you may provide the light transmittance control means in a cover member.

In addition, as a light emitting element, solid light emitting elements, such as LED and organic electroluminescent element, can be applied, In this case, the number and number of light emitting elements are not specifically limited.

One… Body 2... Light source
3 ... Lighting device 4.. Mounting section (adapter guide)
5... Cover member 6.. Reflector
21 ... Substrate 22.. Light emitting element (LED)
C… Instrument mounting surface (ceiling surface) Cb.. Wiring mechanism (sealing mounting body)

Claims (3)

With the apparatus body;
The board | substrate arrange | positioned in the apparatus main body with the mounting surface toward the front surface side;
A plurality of rows are arranged on the substrate, arranged in circumferences of substantially concentric circles with different radii, or on the periphery of approximately centered polygons of different sizes and arranged in a circumferential direction between adjacent rows. A luminaire comprising a light emitting element having an equal number of rows arranged in an offset manner. The lighting device according to claim 1, wherein a lighting device for controlling the lighting of the light emitting element is disposed in the main body of the device. 3. A lighting device according to claim 1 or 2, wherein a substrate is disposed around the main body of the device and mounted with a light emitting element.

Images