JP2012109140A - Led lighting module and lighting fixture equipped with led lighting module - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an LED lighting module and a lighting fixture, wherein intensity of irradiated light is made uniform and light unevenness is alleviated.SOLUTION: The LED lighting module 1 has four or more LED elements 3 arranged on a substrate 2, and an irradiation range of light emitted from the LED elements 3 is of nearly a square shape, with each of the LED elements 3 arranged at a different rotation angle. With this, light doubly irradiating the same irradiation range is eliminated, so that intensity of light is uniformalized to alleviate light unevenness.

Description

  The present invention relates to an LED lighting module and a lighting fixture including the LED lighting module.

  In recent years, lighting fixtures using light-emitting diode elements (hereinafter referred to as LED elements) as light sources with low power consumption and long life have been widely used. As an LED element used in such a lighting apparatus, a type in which a chip has a rectangular shape and light is emitted in a rectangular shape when light emitted from the LED element is directly applied to a wall surface is well known. In this case, there are the following problems in order to make the irradiation range illuminated as a lighting fixture substantially circular.

FIG. 5A shows an LED lighting module in which LED elements are provided in parallel and each in parallel. FIG.5 (b) is the figure which showed typically the irradiation state of the light which the LED illumination module emits.
In the LED illumination module 100 shown in FIG. 5A, a total of seven LED elements 300 are arranged on a substantially disc-shaped substrate 200 at equal intervals.
In this case, as described above, since the irradiation range of the light emitted from each LED element 300 becomes the same rectangular shape, when the light emitted from the plurality of LED elements 300 overlaps and is irradiated onto the wall surface, FIG. A rectangular light as shown in FIG.

Therefore, in order to make the LED illumination module 100 that emits substantially circular light, a special LED lens (not shown) installed in front of the LED element 300 is used, or light is emitted in a circular shape. It was necessary to use a filter or the like configured as described above.
FIG. 6A shows an LED illumination module in which one LED element is provided at the center of the substrate 200 and other LED elements are provided radially. FIG. 6B is a diagram schematically showing an irradiation state of light emitted from the LED illumination module.
According to the LED illumination module 100 shown in FIG. 6 (a), the LED elements 300 are arranged radially and concentrically at equal intervals on the substantially disc-shaped substrate 200, and therefore, shown in FIG. 6 (b). Thus, it is possible to obtain light that is nearly circular as compared to FIG.

However, even in this case, there are places where the light emitted from the LED element 300 overlaps, which becomes strong light and causes unevenness of light.
Therefore, in this case, it has been necessary to process the surface of the LED lens (not shown) to roughen the light exit surface to diffuse the light and suppress the light unevenness.

The following patent document 1 is mentioned as an example which proposed the lighting fixture which uses the above LED elements and makes the irradiation range of light substantially circular.
The lighting fixture disclosed herein includes a plurality of LED elements disposed in a substantially circular region, and at least some of the LED elements are disposed adjacent to each other. Are arranged so that the vertical and horizontal directions of the light emission distribution (irradiation range) are staggered.

Japanese Patent No. 4155285

  However, in the device described in Patent Document 1, there are a plurality of LED elements provided in the same direction in the vertical and horizontal directions and irradiate the same irradiation range. It is considered that light becomes uneven and light unevenness occurs.

  This invention is made | formed in view of the said situation, and aims at providing the lighting fixture provided with the LED lighting module which can aim at reduction of light nonuniformity, and the LED lighting module.

この場合によれば、基板上に複数（少なくとも４個以上）設けられる発光ダイオード素子の設置角度がすべて異なる角度で配設されるので、重複して同じ照射範囲を照らす光がなくなり、光の強さが均一化され、光ムラを低減することができる。 The LED illumination module according to the present invention is an LED illumination module in which four or more light emitting diode elements are disposed on a substrate, and the irradiation range of light emitted from the light emitting diode elements is substantially square. Thus, each of the light emitting diode elements is arranged at different angles based on the rotation angle θn derived by the following mathematical formula (1).

In this case, since the plurality of (at least four or more) light emitting diode elements provided on the substrate are arranged at different angles, there is no overlapping light that illuminates the same irradiation range, and the light intensity is increased. Therefore, the unevenness of light can be reduced.

In the present invention, the substrate may be formed in a substantially disc shape, and the adjacent light emitting diode elements may be provided on the substrate so as to be substantially equidistant.
In this case, it is possible to take out light without unevenness of light without using a special LED lens or performing a processing process such as a roughening process on the exit surface of the LED lens. It can be made substantially circular.

Moreover, in this invention, it is good also as what was equipped with the LED light distribution lens arrange | positioned so as to respond | correspond to each of the said some light emitting diode element.
Furthermore, in this invention, the lighting fixture of this invention shall be equipped with the above-mentioned LED lighting module.

  According to the present invention, the intensity of irradiated light is made uniform, and light unevenness can be reduced.

(A) is an external appearance perspective view which shows the example of the lighting fixture provided with the LED lighting module which concerns on 1st Embodiment of this invention, (b) is a disassembled perspective view of the LED lighting module. (A) is a schematic top view for demonstrating the example of an arrangement | sequence of the LED element in the LED illumination module, (b) is the figure which showed typically the irradiation state of the light which the LED illumination module emits. (A) is a schematic top view for demonstrating the modification of the LED illumination module, (b) is the figure which showed typically the irradiation state of the light which the LED illumination module emits. (A) is a schematic plan view for demonstrating the example of an arrangement | sequence of the LED element in the LED illumination module which concerns on 2nd Embodiment of this invention, (b) is a schematic diagram of the irradiation state of the light which the LED illumination module emits. FIG. It is a schematic diagram for demonstrating the problem of the conventional LED illumination module, (a) is a schematic plan view for demonstrating the example of an arrangement | sequence of the LED element in an LED illumination module, (b) is the LED illumination. It is the figure which showed typically the irradiation state of the light which a module emits. It is the model for further explaining the problem of the conventional LED lighting module, (a) is a schematic plan view for demonstrating the example of an arrangement | sequence of the LED element in an LED lighting module, (b) is the LED It is the figure which showed typically the irradiation state of the light which an illumination module emits.

Embodiments of the present invention will be described below with reference to the drawings.
First, the LED lighting module 1 and the lighting fixture 10 which concern on 1st Embodiment of this invention are demonstrated, referring FIGS. 1-3, Table 1, and Table 2. FIG.

以下、詳しく説明する。 In the LED illumination module 1 according to this embodiment, four or more LED elements 3 are disposed on a substrate 2, and the irradiation range of light emitted from the LED elements 3 is substantially square. Each is arranged at a different angle based on the rotation angle θn derived from the following mathematical formula (1).

This will be described in detail below.

The LED lighting module 1 includes a substrate 2 and a lens module 4, and the LED lighting module 1 is assembled in the hood 12 of the lighting fixture 10 in a state where these are combined.
A lighting fixture 10 shown in FIG. 1A is attached to a ceiling surface or the like and used as a spotlight or the like, and includes a main body portion 11, a lighting attachment portion 14, and an arm 15. The main body 11 is formed in a substantially cylindrical shape, and includes a hood 12 that covers the LED lighting module 1 and a heat sink 13 in which a plurality of heat radiation fins that radiate heat generated by the LED lighting module 1 are formed. The main body portion 11 is supported by an arm 15 attached to the illumination attachment portion 14, and the attachment angle of the main body portion 11 can be changed while being supported by the arm 15. Therefore, the irradiation angle can be easily changed by moving the main body 11. Further, the illumination angle may be changed by moving the LED illumination module 1 by making the LED illumination module 1 movable.

The board | substrate 2 is comprised as a board | substrate 2 combining the board | plate body which consists of a several substantially circular shape, and is integrated with the lens module 4 with which the several LED lens 5 was provided, and screwed etc., and comprises the LED illumination module 1. To do. A plurality of screw holes and notches are formed at predetermined positions on the substrate 2.
The board | substrate 2 is comprised so that a voltage may be supplied from the power supply part (not shown) provided in the illumination attachment part 14 of the lighting fixture 10, and is electrically connected with the power supply part.

  Specifically, the substrate 2 in the figure includes an LED substrate 2A, a heat dissipation sheet 2B, and a mounting plate 2C, and the mounting plate 2C has a feeder line hole 20 for supplying power to the LED substrate 2A. Is provided. The power supply line hole 20 is electrically connected to a power supply line (not shown) drawn from the power supply unit through the arm 15 into the main body unit 11 and thereby configured to appropriately supply a voltage to the LED substrate 2A. ing.

  A lens module 4 having a plurality of LED lenses 5 is provided in front of the LED substrate 2A. The LED lens 5 is made of a transparent acrylic resin material or the like, is formed in a mortar shape with a substantially truncated cone-shaped bottom surface as an upper surface, and may be integrally molded with the lens module 4. May be formed separately.

An LED recess (not shown) is processed and formed in the central portion of the bottom of the LED lens 5, and one LED element 3 is disposed in one LED lens 5, and the LED element 5 is lit by the LED lens 5. In this case, the light emitted is emitted forward.
The upper surface of the LED lens 5 is a light emitting surface 50 (see FIG. 1B) having a substantially circular shape in plan view, and light from the LED element 3 is emitted from the light emitting surface 50. A hole 51 formed toward the bottom side is provided in the approximate center of the light emitting surface 50.

  The surface shape of the light emitting surface 50 may be a shape in which a plurality of honeycomb-shaped cells are configured to diffuse the light emitted from the LED element 3, a cross-sectional corrugated shape, a satin shape, or the like. However, according to the present embodiment, the intensity of light emitted from the light emitting surface 50 is made uniform without special processing on the light emitting surface 50 as will be described later. In addition, light unevenness can be reduced, so that a flat surface may be used.

A plurality of LED elements 3 are provided on the front surface of the LED substrate 2A, and the LED elements 3 are arranged at different angles based on the rotation angle θn derived from the above equation (1).
The LED element 3 is configured by a substantially rectangular chip, and an irradiation range of light emitted from the LED element 3 is approximately rectangular. Specifically, for example, as shown in FIG. 1B and the like, the LED element 3 may be a surface mounting type with a lens. In the figure, 30 is a substantially rectangular package substrate, and 31 is a plan view. Thus, a substantially circular lens body is shown.

  FIG. 2A is a schematic plan view of the LED substrate 2A shown in FIG.

  Here, for the sake of explanation, the numbers “1” to “12” are attached in the vicinity of the respective LED elements 3, but this is not actually described on the LED substrate 2A. Corresponding numbers are given for explanation. Therefore, for example, “1” described in Table 1 corresponds to “1” in FIG. 2A, and “2” described in Table 1 corresponds to “2” in FIG. In FIG. 2A, the respective rotation angles θn are written, which are also provided for explanation.

In the illustrated example, a total of twelve LED elements 3 are provided, and adjacent LED elements 3 are provided on the LED substrate 2A at substantially equal intervals.
Specifically, a total of three LED elements 3 arranged on the LED substrate 2A are arranged on a concentric circle about the center of the LED substrate 2A as an axis, and a total of nine LEDs are arranged on the outer periphery thereof. The elements 3 are also arranged at almost equal intervals on a concentric circle around the center of the LED substrate 2A. The LED elements 3 arranged on the inner side and the LED elements 3 arranged on the outer peripheral side thereof are arranged close to each other at close intervals.

  Table 1 shows the values of the rotation angle θn calculated by the above formula (1) and the numerical values of n and m calculated by substituting into the formula (1). The numbers “1” to “12” in Table 1 correspond to “1” to “12” in FIG.

  In the above formula (1), n is an integer from 1 to 12, and m is calculated as 0 here. Note that m is not limited to 0, and can be any integer from 0 to 3. Examples in which various numerical values are changed will be described later with reference to FIG. The total number of LED elements 3 installed is substituted for R in the formula (1). Therefore, in this example, since the total number of installed LED elements 3 is 12, 12 is substituted.

  Here, the reference rotation angle θn of 0 ° is based on an arbitrary one of the LED elements 3 selected. The reference LED element 3 may be any LED element 3 on the LED substrate 2A. In the example shown in the figure, “1” is n = 1, which is 0 ° as a reference. The other LED elements 3 are arranged based on a rotation angle θn of a predetermined value based on the value of θn calculated by applying n = 2 to 12.

  When the LED element 3 arranged based on the above is caused to emit light, the irradiation state shown in FIG. Specifically, as shown in FIG. 2B, in an irradiation state with a rotation angle of 0 ° as a reference of “1”, substantially square light is irradiated in a state without inclination (0 °). Then, different substantially square lights with angles added by 7.5 ° from “2” to “12” are irradiated.

For example, “7” is calculated as a rotation angle of 45 ° according to the above equation (1). In this case, the LED element 3 of “7” is disposed in a state inclined by 45 ° with respect to the LED element 3 serving as the reference of “1”. Therefore, as for the irradiation state of the light emitted therefrom, the substantially square light is irradiated with light in a state inclined by 45 ° with respect to “1” (see “7” in FIG. 2B).
Further, “12” is calculated as a rotation angle of 82.5 ° according to the above formula (1). In this case, the LED element 3 of “12” is disposed in a state inclined by 82.5 ° with respect to the LED element 3 serving as the reference of “1”. Accordingly, the irradiation state of the light emitted from the light is approximately square light, which is irradiated with light in a state inclined by 82.5 ° with respect to “1” (see “12” in FIG. 2B). .
The number of times the light in the inclined state is irradiated with respect to the reference LED element 3 is described on the right side of the column showing the rotation angle θn in Table 1.

Thus, the LED elements 3 arranged on the LED substrate 2A are arranged at the rotation angle θn derived by the formula (1), so there is no light source that overlaps and emits the irradiation range of the same angle, and there are 12 LEDs. The light of 12 light emission patterns is emitted from the element 3.
That is, in the case of FIG. 5A shown as a conventional example, since all the seven LED elements 3 are arranged at the same angle, the substantially square light of the same angle is emitted, and the seven LED elements 3 are emitted. Irradiation ranges overlap with each other. FIG. 5B shows the state.
In the case of FIG. 6A shown as a conventional example, the seven LED elements 3 have three kinds of irradiation patterns. That is, assuming that the LED element 300 provided in the center of the substrate 200 has a reference of 0 °, the other two LED elements 300 having a rotation angle of 90 ° with respect to the reference LED element 300 have rotation angles of 30 ° and 60 °. The total number of the four is four, and the light irradiation range of the LED elements 300 disposed at the rotation angle of 30 ° and the rotation angle of 60 ° emits substantially square light having the same angle. FIG. 6B shows the state. Therefore, strictly speaking, in FIG. 6B, the light emitted from the four LED elements 300 overlaps with the substantially square light irradiated at an angle of 30 ° (60 ° depending on how to look). It will shine stronger than light.

According to the example shown in FIGS. 2 (a) and 2 (b), there is no overlapping of the irradiation ranges as in the conventional example (FIGS. 5 and 6), and irradiation patterns of different angles are overlapped to the last. Since substantially circular light is emitted, when it hits the irradiated surface, the contrast of the light intensity is made uniform, and light unevenness can be reduced.
In FIG. 2 (b), a plurality of substantially square corners can be seen around a substantially circular portion. However, this is for the purpose of explanation, and when viewed as actual light, The corners are so rounded that they are hardly visible.

Subsequently, a modification of the above-described example shown in FIG. 3 and Table 2 will be described.
The same parts as those in the above-mentioned example are denoted by the same reference numerals, mainly different points will be described, and description of the same parts will be omitted.
Here, an example will be described in which the value of m to be substituted into Equation (1) is arbitrarily substituted from 0 to 3.
As shown in Table 2 below, “1” to “3” of LED element 3 are m = 0, “4” to “6” are m = 1, “7” to “9” are m = 2, and “10”. “12” is substituted with m = 3.

  When the LED element 3 arranged based on the above is caused to emit light, the irradiation state shown in FIG. 3B is obtained, and light is emitted in 12 types of irradiation patterns. Specifically, in an irradiation state with a rotation angle of 0 ° as a reference for “1”, substantially square light is irradiated in a state without inclination (0 °). As a result, different square light beams whose angles are added by 7.5 ° are irradiated from “2” to “12”. Here, the result is that due to the presence of the expression “90 × m”, the value of rotation angle varies depending on the numerical value substituted for m, but approximately square light having the same side length is irradiated. The actual irradiation state of light is the same in both FIG. 2B and FIG. 3B.

  For example, “7” is calculated as a rotation angle of 225 ° according to the above equation (1). In this case, the LED element 3 of “7” is disposed in a state inclined by 225 ° with respect to the LED element 3 serving as the reference of “1”. Accordingly, in the irradiation state of light emitted from the light, a substantially square light is irradiated with light in a state inclined by 225 ° with respect to “1” (see “7” in FIG. 3B). Here, the light in a state inclined by 225 ° with respect to this “1” can be regarded as the light in a state inclined by 45 °. The LED element 3 of “7” in this example is shown in FIG. 7 ”is illuminated.

  In addition, “12” is calculated as 352.5 ° according to Equation (1). In this case, the LED element 3 of “12” is disposed in a state inclined by 352.5 ° with respect to the LED element 3 serving as the reference of “1”. Therefore, the irradiation state of the light emitted from the light is approximately square light, which is irradiated with light in a state inclined by 352.5 ° with respect to “1” (see “12” in FIG. 3B). . Here, the light in the state inclined by 352.5 ° with respect to “1” can be regarded as the light inclined by 82.5 °. The LED element 3 of “12” in this example is shown in FIG. The illumination range with the same inclination as “12” is illuminated.

Next, an LED lighting module 1 according to a second embodiment of the present invention will be described with reference to FIG. 4 and Table 3.
Here, the description common to the first embodiment is omitted as much as possible, and different points are mainly described. The configuration of the LED substrate 2A is different from that described in the first embodiment, but the configuration is the same, and thus the description thereof is omitted.

  This embodiment differs from the above-described embodiment in the total number of LED elements 3 installed. Specifically, an example in which a total of seven LED elements 3 are provided is shown, and one LED element 3 is installed at the center of a substantially disk-shaped LED board 2A, and is concentrically centered on the center of the LED board 2A. A total of six LED elements 3 are installed so as to surround the LED elements 3 arranged in the center at substantially equal intervals.

  Also in the example shown in FIGS. 4A and 4B, each of the LED elements 3 installed on the LED substrate 2A is disposed at a different angle based on the rotation angle θn guided by the above equation (1), and m = 0. The example calculated by is shown. Table 3 shows values when m = 0 to 1 in addition to m = 0. However, if the LED element 3 is arranged based on the formula (1), seven LEDs are provided. The irradiation state of the light emitted from the element 3 is the same as that in FIG. 4B regardless of the numerical value of m (m = 0 to 3).

  When the LED element 3 is caused to emit light based on the above, the irradiation state shown in FIG. 4B is obtained, and light is emitted with seven types of irradiation patterns. Specifically, a substantially square light having a different inclination with the angle added by about 12.85 is irradiated from a rotation angle 0 ° as a reference of “1” to a rotation angle 77.1428 ° of “7”. .

  Also in this example, the irradiation patterns at different angles are overlapped to emit substantially circular light, so that when the light strikes the irradiation surface, the contrast of the light intensity is made uniform and light unevenness can be reduced.

  The total number of the LED elements 3 provided on the LED substrate 2A may be four or more, and is not limited to the illustrated example. As the number of LED elements 3 is larger, an irradiation state closer to a perfect circle can be obtained. Further, the shapes and configurations of the LED substrate 2A, the substrate 2, the lens module 4, and the LED lens 5 are not limited to the illustrated examples. For example, the LED substrate 2A may have a substantially rectangular shape. Moreover, the structure of the lighting fixture 10 is not limited to such a spotlight, but can be applied as a light source for a downlight or a ceiling light.

DESCRIPTION OF SYMBOLS 1 LED lighting module 10 Lighting fixture 2 Board | substrate 3 LED element 5 LED lens

Claims (4)

An LED lighting module in which four or more light emitting diode elements are disposed on a substrate,
The irradiation range of the light emitted from the light emitting diode element has a substantially square shape, and each of the light emitting diode elements is disposed at different angles based on the rotation angle θn derived by the following formula (1). LED lighting module characterized by the above.

In claim 1,
The LED lighting module, wherein the substrate is formed in a substantially disc shape, and the light emitting diode elements adjacent to each other are provided on the substrate at substantially equal intervals. In claim 1 or claim 2,
An LED illumination module comprising an LED light distribution lens arranged to correspond to each of the plurality of light emitting diode elements.   A lighting fixture comprising the LED lighting module according to claim 3.

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