CN101384853A - lighting device - Google Patents

Abstract

The present invention provides a lighting device capable of irradiating light from a light-emitting element module in a wide-angle direction in the front-back direction of the lighting device. The device comprises: a light emitting element module (1) having a light emitting element (1a), an installation part (2) for installing a plurality of light emitting element modules (1), and a pillar (4) for supporting the installation part (2) , the mounting part (2) is bent into a plurality of stages so that the light from the plurality of light emitting element modules (1) mounted on the mounting part (2) is directed to a plurality of different directions, wherein the mounting part (2) is completely bent as follows In multiple stages: the angle (θ1-2) formed by the main optical axis (L1-2) of the light-emitting element module (1-2) mounted on the front end side of the mounting part (2) and the horizontal plane (HL) is smaller than that of the mounting part (2). The angle (θ1-8) formed by the main optical axis (L1-8) of the light emitting element module (1-8) on the bottom side portion of the mounting part (2) and the horizontal plane (HL).

Description

lighting device

technical field

The present invention relates to a lighting device that bends a mounting part in a plurality of stages so that light from a plurality of light emitting element modules mounted on the mounting part is directed in a plurality of different directions.

Background technique

For example, in the lighting device described in Patent Document 1, a light-emitting element module having a light-emitting element, a mounting member for mounting a plurality of light-emitting element modules, and a support member for supporting the mounting member are provided. stage, so that the light from multiple light emitting element modules mounted on the mounting part is directed in multiple different directions.

In addition, in this lighting device, one light emitting element module is composed of a plurality of white light emitting diodes and one flat printed board. And, five light emitting element modules are mounted with respect to the mounting member bent in five stages. And, the mounting part on which the five light emitting element modules are mounted is supported by the supporting part. The mounting part is bent in five stages in the right and left direction.

Therefore, among the mounting parts bent into five stages in the left-right direction, the angle formed by the main optical axis of the light-emitting element module mounted on the central part of the mounting part and the horizontal plane is the largest, and the light-emitting element mounted on the right part of the mounting part The angle formed by the main optical axis of the module and the horizontal plane is the second largest, and the angle formed by the main optical axis of the light emitting element module mounted on the far right part of the mounting part and the horizontal plane is the smallest.

In addition, among the mounting parts bent into five stages in the left and right directions, the angle formed by the main optical axis of the light emitting element module mounted on the central part of the mounting part and the horizontal plane is the largest, and the light emitting element mounted on the left part of the mounting part The angle formed by the main optical axis of the element module and the horizontal plane is the second largest, and the angle formed by the main optical axis of the light emitting element module mounted on the left part of the mounting part and the horizontal plane is the smallest.

As a result, the light from the five light emitting element modules mounted on the mounting member is directed in five directions, and is irradiated at a wide angle in the left and right directions of the lighting device.

Therefore, for example, when the above-mentioned lighting device is installed on the side of a road, the light from the light emitting element module can be irradiated at a wide angle in the traveling direction of the road.

However, in the lighting device described in Patent Document 1, the mounting member is bent in the left-right direction, but is not bent in the front-rear direction.

In this lighting device, since the mounting part is bent in the left-right direction, the angle formed by the main optical axis of the light-emitting element module mounted on the right or left part of the mounting part and the horizontal plane is smaller than that of the light-emitting element module mounted on the central part of the mounting part. The angle formed by the main optical axis of the light-emitting element module and the horizontal plane, but since the mounting part is not bent in the front-rear direction, the main light of the white light-emitting diode located at the front end side of the light-emitting element module installed on the central part of the mounting part The axis is approximately parallel to the main optical axis of the white light-emitting diodes located on the bottom side.

As a result, the light from the light emitting element module can be irradiated at a wide angle in the left and right directions of the lighting device, but cannot be irradiated at a wide angle in the front and rear directions of the lighting device.

Therefore, when the position close to the lighting device on the front side of the lighting device is to be illuminated, the position far away from the lighting device cannot be illuminated. When it is bright, the position close to the lighting device cannot be illuminated.

Specifically, for example, when the above-mentioned lighting device is installed on the side of the road, the light from the light-emitting element module cannot be irradiated at a wide angle in the direction of the lane of the road. As a result, only the position close to the lighting device in the direction of the lane of the road any road surface in the road surface at a location far away from the lighting device.

[Patent Document 1] Japanese Patent Laid-Open No. 2004-200102

Contents of the invention

In view of the above problems, an object of the present invention is to provide a lighting device capable of irradiating light from a light emitting element module in a wide-angle direction in the front-back direction of the lighting device.

In other words, an object of the present invention is to provide a lighting device that can illuminate both a position near the lighting device and a position away from the lighting device in the front side of the lighting device.

More specifically, an object of the present invention is to provide a lighting device capable of illuminating both a road surface at a position close to the lighting device and a road surface at a position away from the lighting device in the direction of a traffic lane of a road.

According to the present invention, a lighting device is provided, which has: a light emitting element module having a light emitting element, a mounting part for mounting a plurality of light emitting element modules, and a supporting part for supporting the mounting part, the The mounting part is bent into a plurality of stages so that light from a plurality of light emitting element modules mounted on the mounting part is directed to a plurality of different directions, and the lighting device is characterized in that the mounting part is bent into a plurality of stages as follows: The angle formed by the main optical axis of the light-emitting element module mounted on the front side part of the mounting part and the horizontal plane is smaller than the angle formed by the main optical axis of the light-emitting element module mounted on the bottom side part of the mounting part and the horizontal plane. Angle.

In the lighting device of the present invention, the mounting part is bent in a plurality of stages in the front-rear direction of the lighting device. The angle formed by the main optical axis of the light emitting element module on the bottom side portion of the mounting part and the horizontal plane.

Preferably, the main optical axis of the light-emitting element module installed on the front side part of the mounting part points to a position away from the lighting device in the front side of the lighting device, and the main light axis of the light-emitting element module mounted on the bottom side part of the mounting part The axis points to a position in the front side of the lighting device close to the lighting device.

Therefore, according to the lighting device of the present invention, it is possible to irradiate the light from the light emitting element module at a wide angle in the front-back direction of the lighting device.

In other words, according to the lighting device of the present invention, both a position close to the lighting device and a position far from the lighting device can be illuminated on the front side of the lighting device.

When the lighting device of the present invention is installed beside the road, it is possible to illuminate both the road surface at a position close to the lighting device and the road surface at a position away from the lighting device in the traffic lane direction of the road.

And, in the lighting device of the present invention, as described above, the main optical axis of the light-emitting element module mounted on the front end side portion of the mounting part is directed to a position away from the lighting device in the front side of the lighting device, so it is different from that mounted on the mounting part. Compared with the case where the main optical axis of the light-emitting element module on the bottom side of the light-emitting element module points to a position away from the lighting device in the front side of the lighting device, the light path from the light-emitting element module can be shortened, and the position away from the lighting device can be illuminated.

Preferably, a lens for condensing light emitted from the light emitting element is provided. In addition, the condensing characteristics of the lens are set such that the condensing degree in the left-right direction of the lighting device is smaller than the condensing degree in the front-back direction of the lighting device.

Therefore, according to the lighting device of the present invention, the light from the light emitting device module can be irradiated at a wide angle in the left and right direction of the lighting device while keeping the lateral dimension of the light emitting device module small. Therefore, according to the lighting device of the present invention, the light from the light emitting device modules can be irradiated at a wide angle in the left and right directions of the lighting device while suppressing the lateral dimension of the mounting member on which the plurality of light emitting device modules is mounted.

That is, according to the illuminating device of the present invention, light from the light emitting element modules can be irradiated at a wide angle in the left and right directions of the illuminating device while suppressing the lateral protrusion of the plurality of light emitting element modules and the mounting member from the supporting member.

When the mounting part is divided into a plurality of partitions, and the number of light-emitting element modules that are the same as the number of partitions of the mounting part is mounted on the mounting part, the light from the light-emitting element modules mounted on a certain partition is different from the light from other partitions. Light coincidence of light emitting element modules.

In view of this, in the lighting device of the present invention, preferably, in order to reduce the overlap of the light from the light emitting element modules installed on a certain partition and the light from the light emitting element modules installed on other partitions, the mounting parts It is divided into a plurality of partitions, and the light emitting element modules whose number is smaller than the number of partitions of the mounting member are mounted on the mounting member.

Therefore, according to the lighting device of the present invention, the number of light emitting element modules can be reduced without reducing the overall performance of the lighting device. As a result, according to the lighting device of the present invention, the manufacturing cost and running cost of the lighting device can be reduced without lowering the overall performance of the lighting device.

In other words, in the lighting device of the present invention, it is preferable that the number of partitions is formed on the mounting member to be greater than the number of light emitting element modules. Therefore, according to the lighting device of the present invention, by changing the partition where the light emitting element module is mounted, that is, by changing the position where the light emitting device module is mounted, the characteristics of the entire lighting device can be easily changed. That is, it is possible to easily change the characteristics of the entire lighting device according to the situation in which the lighting device is installed.

In the lighting device of the present invention, it is preferable to use an LED as a light-emitting element, and to be provided with: a fluorescent body configured to cover the LED, and a reflector having a reflective surface for reflecting light from the LED and the fluorescent body; The surface is provided with: a part where the light storage material is arranged, and a part where the light storage material is not arranged.

That is, in the lighting device of the present invention, it is preferable that a light storage material is disposed on the reflection surface for reflecting light from the LED and the phosphor. Therefore, when the LED is off, the light accumulated in the light storage material when the LED is on can be irradiated. As a result, auxiliary light can be irradiated when the LED is turned off, and power consumption of the LED can be reduced.

In the lighting device of the present invention, it is preferable to select the phosphor with the main purpose of color reproducibility and high brightness. Thereby, energy saving, color reproducibility, and high luminance can all be realized at the same time.

In the lighting device of the present invention, preferably, the light storage material is coated on the reflective surface in a grid shape or a dot shape.

Furthermore, in the illuminating device of the present invention, it is preferable that a grid-like thin plate containing a light storage material is stuck on the reflective surface.

Alternatively, in the lighting device of the present invention, preferably, the reflector coated with the light storage material is covered with a thin plate having holes.

Furthermore, in the lighting device of the present invention, preferably, the reflector is formed of a material added with a light storage material. More preferably, the reflector is formed from a material to which a light storage material has been added.

In other words, in the lighting device of the present invention, it is preferable that the light storage material is not arranged on the entire surface of the reflective surface, and the part where the light storage material is not arranged remains on the reflective surface. Therefore, compared with the case where the light storage material is arranged on the entire surface of the reflective surface, the reflectance of the reflective surface can be increased, and the risk of weakening of the reflected light from the reflective surface when the LED is turned on can be reduced. That is, according to the lighting device of the present invention, auxiliary light can be irradiated when the LED is off, and the risk of weakening of the reflected light from the reflective surface when the LED is on can be reduced.

In the lighting device of the present invention, preferably, a heat transfer member is arranged between the LED, the phosphor, and the light storage material. That is, the LED and phosphor are thermally connected to the light storage material. Preferably, a heat sink is disposed between the LED, the phosphor, and the light storage material. Therefore, the temperature of the light-storage material can be increased by using the heat generated by the LED, thereby increasing the luminous intensity of the light-storage material.

Description of drawings

FIG. 1 is a diagram showing a light emitting element module 1 constituting a part of the lighting device according to the first embodiment.

FIG. 2 is a diagram showing a light distribution pattern of light irradiated from the light emitting element module 1 shown in FIG. 1 .

FIG. 3 is a diagram showing a mount member 2 to which a plurality of light emitting element modules 1 shown in FIG. 1 is mounted, and a globe 3 for covering the plurality of light emitting element modules 1 and the mount member 2 .

FIG. 4 is a diagram showing a mounting member 2 on which a plurality of light emitting element modules 1 shown in FIG. 1 are mounted, and a globe 3 for covering the plurality of light emitting element modules 1 and the mounting member 2 .

FIG. 5 is an overall view of the lighting device 10 according to the first embodiment.

Fig. 6 is an enlarged cross-sectional view of a light emitting element (LED package) 1a and the like of an illumination device 10 according to a fifth embodiment.

Fig. 7 is an enlarged view of a light emitting element (LED package) 1a, a reflector 1b, and a thermal interface material 1d of a lighting device 10 according to the fifth embodiment.

Fig. 8 is an enlarged view of a light emitting element (LED package) 1a, a reflector 1b, and a thermal interface material 1d of a lighting device according to a sixth embodiment.

Fig. 9 is an enlarged view of a light emitting element (LED package) 1a, a reflector 1b, a thermal interface material 1d, and the like of a lighting device according to a seventh embodiment.

Fig. 10 is an enlarged view of a light emitting element (LED package) 1a, a reflector 1b, a thermal interface material 1d, and the like of a lighting device according to an eighth embodiment.

Fig. 11 is an enlarged view of a reflector 1b of a lighting device according to a ninth embodiment.

12 is a cross-sectional view of a light emitting element module of a lighting device according to a tenth embodiment.

Fig. 13 is a component diagram of the reflector 10b shown in Fig. 12 .

Fig. 14 is a cross-sectional view of a light emitting element module of a lighting device according to a twelfth embodiment.

Fig. 15 is a component diagram of the reflector 20b shown in Fig. 14 .

Detailed ways

FIG. 1 is a diagram showing a light emitting element module 1 constituting a part of an illumination device according to a first embodiment of the present invention. In detail, FIG. 1(A) is a left side view of the light-emitting element module 1 shown in partial cutaway, FIG. 1(B) is a front view of the light-emitting element module 1, and FIG. The perspective view of the light emitting element module 1 is viewed from the lower side, and FIG. 1(D) is a bottom view of the light emitting element module 1 .

In FIG. 1, 1a represents a light emitting element such as an LED (Light Emitting Diode). 1b represents a reflector having a reflective surface for reflecting light emitted from the light emitting element 1a downward (the lower side in FIG. 1(A) and FIG. 1(B) ). 1c represents a lens mounted on the reflector 1b for controlling the light distribution of the direct light from the light emitting element 1a and the reflected light from the reflective surface of the reflector 1b.

And, in FIG. 1 , 1d denotes a thermal interface material for supporting the light emitting element 1a and the reflector 1b and discharging or thermally conducting heat generated by the light emitting element 1a. 1e denotes a housing for supporting the thermal interface material 1d. 1e1 denotes a heat sink, which constitutes a part of the housing 1e. 1f represents a cover for covering the light emitting element 1a, the reflector 1b, the lens 1c, and the thermal interface material 1d. 2 denotes a mounting member for mounting the light emitting element module 1 .

In the lighting device of the first embodiment, part of the heat generated by the light emitting element 1a is discharged from the thermal interface material 1d. Then, part of the heat generated by the light emitting element 1a is thermally conducted to the heat sink 1e1 of the case 1e via the thermal interface material 1d, and the heat is released from the heat sink 1e1. Then, part of the heat generated by the light emitting element 1 a is conducted to the mounting member 2 via the thermal interface material 1 d and the case 1 e, and heat is released from the mounting member 2 .

In addition, in the lighting device of the first embodiment, as shown in FIG. 1, three sets of light emitting elements 1a, reflectors 1b, and lenses 1c are provided on one light emitting element module 1, but as the second embodiment, one light emitting element module 1 may be provided The light-emitting element 1a, the reflector 1b, and the lens 1c are provided in any number of sets other than three sets on the element module 1 .

FIG. 2 is a diagram showing a light distribution pattern of light irradiated from the light emitting element module 1 shown in FIG. 1 . The left side of FIG. 2 corresponds to the rear side of the light emitting element module 1 shown in FIG. 1 (the lower left side of FIG. 1(C)), and the right side of FIG. 2 corresponds to the front side of the light emitting element module 1 shown in FIG. 1 ( The upper right side of Fig. 1(C), the upper side of Fig. 2 corresponds to the right side of the light-emitting element module 1 shown in Fig. 1 (the lower right side of Fig. 1(C)), and the lower side of Fig. 2 corresponds to Fig. 1 The left side of the light-emitting element module 1 shown (the upper left side in FIG. 1(C) ).

In the lighting device of the first embodiment, as shown in FIGS. 1 and 2 , the light-condensing characteristics of the lens 1c are set so that the left-right direction of the light-emitting element module 1 (outside-inside direction in FIG. 1(A) , the left-right direction of FIG. 1(B), the upper-left-lower-right direction of FIG. 1(C), the left-right direction of FIG. 1(D), and the up-and-down direction of FIG. The left-right direction of Fig. 1 (A), the outer-inside direction of Fig. 1 (B), the upper right-lower left direction of Fig. 1 (C), the up-down direction of Fig. 1 (D), and the left-right direction of Fig. 2) luminosity.

In other words, in the lighting device according to the first embodiment, as shown in FIG. 2 , the light distribution pattern of the light irradiated from the light-emitting element module 1 is set so that the ratio in the left-right direction (up-down direction in FIG. 2 ) is higher than that in the It is longer in the front-back direction (left-right direction in FIG. 2 ).

Hereinafter, the configuration of the lighting device according to the first embodiment will be described in detail with reference to FIGS. 3 and 4 .

FIGS. 3 and 4 show a mounting member 2 mounted with a plurality of light emitting element modules 1 shown in FIG. 1 , and a lamp cover 3 for covering the plurality of light emitting element modules 1 and the mounting member 2 . In detail, FIG. 3(A) is a view of the mounting member 2 and the lampshade 3 from the front, FIG. 3(B) is a view of the mounting member 2 and the lampshade 3 from the bottom side, and FIG. 4(A) is a view of the lampshade 3. The left side view, FIG. 4(B) is a left side view of the lampshade 3 with a partially see-through mounting part 2 .

In the lighting device of the first embodiment, as shown in FIG. 3(A) and FIG. 3(B), the mounting member 2 is divided into eighteen partitions 2-1, 2-2, 2-3, 2-4 , 2-5, 2-6, 2-7, 2-8, 2-9, 2-10, 2-11, 2-12, 2-13, 2-14, 2-15, 2-16, 2 —17, 2-18, install fourteen light-emitting element modules 1 (1-1, 1-2, 1-3, 1-4, 1-6) shown in Figure 1 on fourteen partitions in these partitions , 1-7, 1-8, 1-9, 1-10, 1-12, 1-13, 1-15, 1-16, 1-18).

Specifically, the partition 2 - 1 , the partition 2 - 2 , and the partition 2 - 3 of the attachment member 2 are bent in two and formed in a concave shape (specifically, a concave shape when viewed from the lower side). As a result, the light-emitting element module 1-1 mounted on the partition 2-1, the light-emitting element module 1-2 mounted on the partition 2-2, and the light-emitting element module 1-3 mounted on the partition 2-3 point in different directions .

Similarly, the subsection 2 - 4 , the subsection 2 - 5 , and the subsection 2 - 6 of the mounting member 2 are bent in two and formed in a concave shape (specifically, a concave shape when viewed from the lower side). As a result, the light-emitting element module 1-4 mounted on the partition 2-4, and the light-emitting element module 1-6 mounted on the partition 2-6 point in directions different from each other. And, the angles at which the partitions 2-1, 2-3 are bent with respect to the partition 2-2 of the mounting part 2, and the angles at which the partitions 2-4, 2-6 are bent with respect to the partition 2-5 of the mounting part 2 are set as different values. As a result, the light-emitting element module 1-4 installed on the partition 2-4 and the light-emitting element module 1-6 installed on the partition 2-6 are all different from the light-emitting element modules 1-1, 1-2, and 1-3. direction.

Furthermore, the subsection 2-7, the subsection 2-8, and the subsection 2-9 of the mounting member 2 are curved in two steps, and are formed in a concave shape (specifically, a concave shape when viewed from the lower side). As a result, the light emitting element module 1-7 mounted on the partition 2-7, the light emitting element module 1-8 mounted on the partition 2-8, and the light emitting element module 1-9 mounted on the partition 2-9 are directed differently from each other. direction.

And, as shown in Fig. 3 (B) and Fig. 4 (B), the partition 2-5 and the partition 2-8 of the mounting member 2 are curved into a convex shape (in detail, it is a convex shape when viewed from the lower side). ). As a result, the light emitting element module 1-7 mounted on the partition 2-7, the light emitting element module 1-8 mounted on the partition 2-8, and the light emitting element module 1-9 mounted on the partition 2-9 point and emit light The component modules 1-1, 1-2, 1-3, 1-4, and 1-6 all have different directions.

Furthermore, the subsection 2-10, the subsection 2-11, and the subsection 2-12 of the mounting member 2 are bent in two steps, and are formed in a concave shape (specifically, a concave shape when viewed from the lower side). As a result, the light-emitting element module 1-10 mounted on the partition 2-10 and the light-emitting element module 1-12 mounted on the partition 2-12 point in directions different from each other. And, the angles at which the partitions 2-7, 2-9 are bent with respect to the partition 2-8 of the mounting part 2, and the angles at which the partitions 2-10, 2-12 are bent with respect to the partition 2-11 of the mounting part 2 are set as different values. As a result, the light-emitting element modules 1-10 mounted on the partition 2-10, and the light-emitting element modules 1-12 mounted on the partition 2-12 point to the light-emitting element modules 1-1, 1-2, 1-3, 1 -4, 1-6, 1-7, 1-8, 1-9 are all different directions.

Furthermore, the subsection 2-13, the subsection 2-14, and the subsection 2-15 of the mounting member 2 are bent in two steps, and are formed in a concave shape (specifically, a concave shape when viewed from the lower side). As a result, the light-emitting element module 1-13 mounted on the partition 2-13 and the light-emitting element module 1-15 mounted on the partition 2-15 point in directions different from each other.

And, as shown in Fig. 3 (B) and Fig. 4 (B), the partition 2-11 and the partition 2-14 of the mounting part 2 are curved into a convex shape (in detail, it is a convex shape when viewed from the lower side). ). As a result, the light-emitting element modules 1-13 mounted on the partition 2-13, and the light-emitting element modules 1-15 mounted on the partition 2-15 point to the light-emitting element modules 1-1, 1-2, 1-3, 1 -4, 1-6, 1-7, 1-8, 1-9, 1-10, 1-12 are all different directions.

Furthermore, the subsection 2-16, the subsection 2-17, and the subsection 2-18 of the mounting member 2 are bent in two steps, and are formed in a concave shape (specifically, a concave shape when viewed from the lower side). As a result, the light-emitting element module 1-16 mounted on the subsection 2-16 and the light-emitting element module 1-18 mounted on the subsection 2-18 point in directions different from each other. And, the angles at which the partitions 2-13, 2-15 are bent with respect to the partition 2-14 of the mounting part 2, and the angles at which the partitions 2-16, 2-18 are bent with respect to the partition 2-17 of the mounting part 2 are set as different values. As a result, the light-emitting element modules 1-16 mounted on the partition 2-16, and the light-emitting element modules 1-18 mounted on the partition 2-18 point to the light-emitting element modules 1-1, 1-2, 1-3, 1 -4, 1-6, 1-7, 1-8, 1-9, 1-10, 1-12, 1-13, 1-15 are all in different directions.

FIG. 5 shows the whole of the lighting device 10 according to the first embodiment. Specifically, FIG. 5(A) is a front view of the lighting device 10 according to the first embodiment, and FIG. 5(B) is a left side view of the lighting device 10 according to the first embodiment.

In FIG. 5 , 4 denotes a pillar for supporting the mounting member 2 shown in FIGS. 3 and 4 . 1-1R represents the right edge (upper edge in FIG. 2 ) of the light distribution pattern of light irradiated from the light-emitting element module 1-1 shown in FIGS. 3(A) and 3(B). 1-3L represents the left edge (lower edge in FIG. 2 ) of the light distribution pattern of light irradiated from the light emitting element module 1-3 shown in FIGS. 3(A) and 3(B).

In addition, in FIG. 5, L1-2 represents the main optical axis of the light emitting element module 1-2 shown in FIG. 3(A), FIG. 3(B) and FIG. 4(B). L1-8 represents the main optical axis of the light emitting element module 1-8 shown in FIG. 3(A), FIG. 3(B) and FIG. 4(B). θ1-2 represents the angle formed by the main optical axis L1-2 of the light-emitting element module 1-2 and the horizontal plane HL (see FIG. 4(B) ). θ1-8 represents the angle formed by the main optical axis L1-8 of the light-emitting element module 1-8 and the horizontal plane HL (see FIG. 4(B)). 1-2F represents the front edge portion (right edge portion in FIG. 2 ) of the light distribution pattern of light irradiated from the light emitting element module 1-2. 1-16B represents the rear edge portion (left edge portion in FIG. 2 ) of the light distribution pattern of light irradiated from the light emitting element module 1-16 shown in FIGS. 3(A) and 3(B).

In addition, in the lighting device 10 of the first embodiment, as shown in FIGS. It is directly mounted on the pillar 4, or the mounting member 2 is mounted on the pillar 4 via a member other than the lamp cover 3.

In the lighting device 10 according to the first embodiment, as shown in FIGS. (In detail, it is convex when viewed from the lower side), so that it is installed on the front end side (front side) of the mounting member 2 (the upper side of FIG. 3(A), the upper side of FIG. 3(B), The angle θ1 formed by the main optical axis L1-2 of the light-emitting element module 1-2 on the right side of FIG. 4(B) and the right side of FIG. 5(B)) and the horizontal plane HL (see FIG. 4(B)) -2 is less than the rear side (the bottom side of the mounting part 2) (the lower side of FIG. 3(A), the lower side of FIG. 3(B), the left side of FIG. 4(B), The angle θ1-8 formed by the main optical axis L1-8 of the light emitting element module 1-8 on the left side of FIG. 5(B) and the horizontal plane HL (see FIG. 4(B)).

That is, as shown in FIG. 4(B), the mounting member 2 is bent into two stages in the front-rear direction (the left-right direction of FIG. 4(B)), and as a result, the The angle θ1-2 formed by the main optical axis L1-2 of the light-emitting element module 1-2 and the horizontal plane HL on the part on the right is smaller than that installed on the bottom side of the mounting part 2 compared with the light-emitting element module 1-2 (Fig. 4 The angle θ1-8 formed by the main optical axis L1-8 of the light-emitting element module 1-8 on the left side of (B) and the horizontal plane HL.

In detail, the main optical axis L1-2 of the light emitting element module 1-2 mounted on the front end side (the right side of FIG. 4(B), the right side of FIG. 5(B)) of the mounting member 2 is directed away from the illumination The position P1-2 of the device 10 is mounted on the light-emitting element on the bottom side (the left side of FIG. 4(B) and the left side of FIG. 5(B)) of the mounting part 2 compared with the light-emitting element module 1-2. The main optical axis L1 - 8 of the modules 1 - 8 is directed close to the position P1 - 8 of the lighting device 10 .

Therefore, the light emitting element modules 1-1, 1-2, 1-3, 1-4, 1-6, 1-7, 1-8, 1-9, 1-10, 1-12, 1- The lights of 13, 1-15, 1-16, and 1-18 are irradiated at a wide angle in the front-back direction (the left-right direction in FIG. 5(B) ) of the lighting device 10 .

In other words, according to the lighting device 10 of the first embodiment, both the position close to the lighting device 10 and the position away from the lighting device 10 on the front side of the lighting device 10 (the right side in FIG. 5B ) can be illuminated. Bright.

Therefore, when the lighting device 10 according to the first embodiment is installed on the side of the road, the road surface near the lighting device 10 and the distance away from the lighting device 10 in the traffic lane direction of the road (the left-right direction in FIG. 5(B) ) can be separated. The location of the pavement is illuminated by both.

In addition, in the lighting device 10 according to the first embodiment, as shown in FIGS. The main optical axis L1-2 of the element module 1-2 is directed away from the position P1-2 of the illuminating device 10, thus, it is compatible with the light-emitting element module mounted on the bottom side (left side of FIG. 4(B)) of the mounting part 2. (For example, light-emitting element modules 1-16, 1-18, etc.) the main optical axis pointing away from the situation of the position P1-2 of the lighting device 10, can shorten the light path from the light-emitting element module to the irradiation position P1-2, as a result, A position P1 - 2 away from the lighting device 10 can be illuminated.

Furthermore, in the illuminating device 10 of the first embodiment, as shown in FIG. 1(A) and FIG. 1(C), a lens 1c for converging light radiated from the light emitting element 1a is further provided. And, as shown in FIG. 2 , the light-gathering characteristics of the lens 1c are set to: make the light-gathering degree on the left-right direction (up-down direction in FIG. 2 ) of the lighting device 10 smaller than direction), that is, to make the left-right dimension (the vertical dimension in FIG. 2 ) of the light distribution pattern of light irradiated from the light-emitting element module 1 larger than the front-back dimension (the left-right dimension in FIG. 2 ).

Therefore, according to the lighting device 10 of the first embodiment, the horizontal dimension of the light-emitting element module 1 (the horizontal dimension in FIG. 1(B), the horizontal dimension in FIG. The light from the light-emitting element module 1 is irradiated at a wide angle in the left-right direction of the lighting device 10 (the left-right direction in FIG. 5(A) ). Therefore, according to the lighting device 10 of the first embodiment, a plurality of light emitting element modules 1 (1-1, 1-2, 1-3, 1-4, 1-6, 1-7, 1-8 . The left-right dimension of (B) is kept small, and the light from the light-emitting element module 1 is irradiated at a wide angle in the left-right direction of the lighting device 10 (the left-right direction in FIG. 5(A) ).

That is, according to the lighting device 10 of the first embodiment, as shown in FIG. 3(A), FIG. 3(B) and FIG. 1-3, 1-4, 1-6, 1-7, 1-8, 1-9, 1-10, 1-12, 1-13, 1-15, 1-16, 1-18) and installation The part 2 protrudes from the pillar 4 to the left and right direction (the left and right direction of FIG. ) wide-angle exposure.

In Fig. 3 (A) and Fig. 3 (B), if the light-emitting element modules 1 of the same number (eighteen) as the partition number (eighteen) of the installation part 2 are installed on the installation part 2, then from being installed on the partition 2— The light from the light-emitting element module 1-2 on 2 coincides with the light from the light-emitting element module 1 installed on the partition 2-5, and the light from the light-emitting element module 1-8 installed on the partition 2-8 coincides with the light from the light-emitting element module 1 installed on the partition 2-8. The light from the light-emitting element module 1 on the partition 2-11 overlaps, and the light from the light-emitting element module 1-13 and 1-15 installed on the partition 2-13 and 2-15 and the light from the light-emitting element module installed on the partition 2-14 The light from the element module 1 coincides, and the light from the light-emitting element modules 1-16 and 1-18 installed on the partitions 2-16 and 2-18 coincides with the light from the light-emitting element module 1 installed on the partition 2-17 .

On the other hand, in the lighting device 10 of the first embodiment, in order to prevent the light from the light emitting element module 1 - 2 mounted on the partition 2 - 2 from the light from the light emitting element module 1 mounted on the partition 2 - 5 Coincidentally, no light-emitting element module 1 is installed on partitions 2-5. And, in order to prevent the light from the light-emitting element module 1-8 installed on the partition 2-8 from overlapping with the light from the light-emitting element module 1 installed on the partition 2-11, no light-emitting element module is installed on the partition 2-11. 1. And, in order to prevent the light from the light-emitting element modules 1-13, 1-15 installed on the partitions 2-13, 2-15 from overlapping with the light from the light-emitting element module 1 installed on the partition 2-14, in the partition 2 -14 does not install the light-emitting element module 1. And, in order to prevent the light from the light-emitting element modules 1-16, 1-18 installed on the partitions 2-16, 2-18 from overlapping with the light from the light-emitting element module 1 installed on the partition 2-17, in the partition 2 -17 does not install the light-emitting element module 1.

In this way, the number of light emitting element modules 1 that are smaller (fourteen) than the number of partitions (eighteen) of the mounting member 2 is mounted on the mounting member 2 .

Therefore, the number of light emitting element modules 1 can be reduced without reducing the overall performance of the lighting device. As a result, according to the lighting device 10 of the first embodiment, the manufacturing cost and running cost of the lighting device 10 can be reduced without lowering the overall performance of the lighting device.

In other words, in the lighting device 10 according to the first embodiment, the number of partitions is formed on the mounting member 2 greater than the number of the light emitting element modules 1 . Therefore, by changing the partition where the light-emitting element module 1 is mounted, that is, by changing the position where the light-emitting element module 1 is mounted, the characteristics of the lighting device as a whole can be easily changed. That is, the characteristics of the entire lighting device can be easily changed according to the installation situation of the lighting device 10 .

In addition, in the lighting device 10 of the first embodiment, as shown in FIG. 3(A) and FIG. In the fourth embodiment, instead, an arbitrary number of light emitting element modules 1 other than fourteen may be mounted on a mounting member 2 having an arbitrary number of partitions greater than the number of light emitting element modules 1 .

In the lighting device 10 according to the first embodiment, the area irradiated by one light-emitting element module 1 does not substantially coincide with the irradiated area of the entire lighting device, but the area irradiated by one light-emitting element module 1 is smaller than the irradiated area of the entire lighting device. .

That is, the entire irradiated area of the lighting device is divided into a plurality of small areas, and one small area is assigned the irradiated area of one light emitting element module 1 . In addition, overlapping portions are provided in the irradiation areas of two adjacent light emitting element modules 1 .

Next, a lighting device according to a fifth embodiment will be described with reference to FIGS. 6 and 7 . The lighting device 10 of the fifth embodiment has substantially the same configuration as the lighting device 10 of the above-mentioned first embodiment except for the structure of the light emitting element.

Fig. 6 is an enlarged cross-sectional view of a light emitting element (LED package) 1a and the like of an illumination device 10 according to a fifth embodiment. In the lighting device of the fifth embodiment, as shown in FIG. 6 , a light emitting element (LED package) 1a includes LEDs 1a1 and phosphors 1a2 arranged to cover these LEDs 1a1. The phosphor 1a2 is selected for the main purpose of color reproducibility and high brightness. For example, phosphors that emit light when excited by blue light and ultraviolet light are selected.

7 is an enlarged view of the light emitting element (LED package) 1a, the reflector 1b, and the thermal interface material 1d of the lighting device 10 according to the fifth embodiment, and FIG. 7(A) is a front view of the light emitting element (LED package) 1a. , reflector 1b and enlarged cross-sectional view of thermal interface material 1d. FIG. 7(B) is a bottom view of these components, that is, a view of these components viewed from the lower side of FIG. 7(A) .

In the lighting device according to the fifth embodiment, as shown in FIG. 7(A) and FIG. 7(B), on the reflective surface 1b1 of the reflector 1b, there are provided: a portion 1b1a where the light storage material is arranged, and a portion where the light storage material is not arranged. Part 1b1b of. Specifically, the portion 1b1a where the light storage material is arranged is formed by applying the light storage material in a grid pattern on the reflective surface 1b1 of the reflector 1b. Then, the light storage material is coated on the entire lower surface of the reflector 1b (the lower surface in FIG. 7(A) ). As the light storage material, for example, a fluorescent material having long persistence, brightness and reliability is used. Specifically, for example, materials composed of divalent metal aluminates activated by rare earths, materials composed of borate-substituted aluminates of divalent metals activated by rare earths, materials activated by europium (Eu) and co-activated by rare earths, etc. A material composed of silicate, a material composed of europium (Eu)-activated rare earth oxysulfide, and the like can be used as the light storage material.

Part of the heat generated by the light emitting element (LED package) 1a is thermally conducted to the light storage material on the reflective surface 1b1 of the reflector 1b and the light storage material on the lower surface of the reflector 1b via the thermal interface material 1d and the reflector 1b. As a result, the temperature of the light storage material rises, and the light emission intensity of the light storage material increases.

In addition, in the lighting device according to the fifth embodiment, as shown in FIG. 1 , FIG. 6 and FIG. 7 , when the LED 1a1 is turned on, part of the light emitted from the LED 1a1 and the phosphor 1a2 is controlled by the lens 1c for light distribution. , and illuminate the lower side of Figure 1(A). And, when the LED 1a1 is turned on, part of the light emitted from the LED 1a1 and the phosphor 1a2 is reflected by the part 1b1b of the reflective surface 1b1 of the reflector 1b where no light storage material is placed, and the light distribution is controlled by the lens 1c, and is irradiated to The lower side of Figure 1(A). And, when the LED 1a1 is turned on, part of the light emitted from the LED 1a1 and the phosphor 1a2, and the light entering the light emitting element module 1 from the outside of the light emitting element module 1 (for example, sunlight, light from other lighting fixtures, etc.) A part of is accumulated by the light storage material on the reflective surface 1b1 of the reflector 1b and the light storage material on the lower surface of the reflector 1b.

And, when the LED 1a1 is turned off, the light emitted by the light storage material on the reflective surface 1b1 of the reflector 1b is radiated, the light distribution is controlled by the lens 1c, and it is irradiated to the lower side of FIG. 1(A). And, when the LED 1a1 is turned off, the light emitted from the light storage material on the lower surface of the reflector 1b is emitted, and is irradiated to the lower side of FIG. 1(A).

It is preferable to pulse-drive the LED 1a1 in consideration of the afterglow luminance of the light-storage material, and to assist the use of light emission from the light-storage material when the LED 1a1 is turned off. Thereby, energy saving can be realized.

Specifically, considering the afterglow brightness of the light storage material, the afterglow time, and the time to reach saturated brightness, the off period of the LED 1a1 is set so that the user of the lighting device cannot feel the flicker of the LED 1a1 when the LED 1a1 is off. In the range of sensitivity, the maximum brightness of the light storage material is obtained.

As described above, in the lighting device of the first embodiment, neither the phosphor nor the light storage material is provided, but in the lighting device of the fifth embodiment, the phosphor 1a2 and the light storage material are provided.

As described above, in the lighting device 10 of the fifth embodiment, the light storage material is disposed on the reflection surface 1b1 (see FIG. 7 ) for reflecting light from the LED 1a1 (see FIG. 6 ) and the phosphor 1a2. Therefore, when the LED 1a1 is turned off, the light accumulated in the light storage material when the LED 1a1 is turned on (specifically, light from the LED 1a1 and the phosphor 1a2, as well as sunlight, light from other lighting fixtures, etc., can be irradiated. such light from outside the lighting device 10). Accordingly, auxiliary light can be irradiated when the LED 1a1 is turned off, and power consumption of the LED 1a1 can be reduced.

Furthermore, in the lighting device 10 according to the fifth embodiment, the phosphor 1a2 is selected mainly for the purpose of color reproducibility and high brightness (see FIG. 6 ). Therefore, energy saving, color reproducibility, and high luminance can all be realized at the same time.

And, as shown in FIG. 7, the light storage material is coated on the reflective surface 1b1 of the reflector 1b in a grid shape. Part 1b1b of light storage material. That is, the light storage material is not arranged on the entire surface of the reflection surface 1b1, and the portion 1b1b where the light storage material is not arranged remains on the reflection surface 1b1.

Therefore, compared with the case where the light storage material is arranged on the entire surface of the reflective surface 1b1, the reflectance of the reflective surface 1b1 can be increased, and the risk of weakening of the reflected light from the reflective surface 1b1 when the LED 1a1 is turned on can be reduced.

That is, according to the lighting device 10 of the fifth embodiment, while the auxiliary light can be irradiated when the LED 1a1 is turned off, the risk of weakening of the reflected light from the reflective surface 1b1 when the LED 1a1 is turned on can be reduced.

In addition, in the lighting device 10 according to the fifth embodiment, as shown in FIGS. 1 , 6 and 7, a thermal interface material 1d having a heat transfer function and a reflector are disposed between the LED 1a1, the phosphor 1a2, and the light storage material. The device 1b, the LED 1a1 and the phosphor 1a2 are thermally connected to the light storage material. The thermal interface material 1d and the reflector 1b disposed between the LED 1a1, the phosphor 1a2, and the light storage material function as a heat sink.

Therefore, the temperature of the light-storage material can be increased by using the heat generated by the LED 1a1, thereby increasing the luminous intensity of the light-storage material.

Next, the sixth to ninth embodiments will be described. These embodiments differ from the fifth embodiment in the structure of the light emitting element and the reflector.

Fig. 8 is an enlarged view of a light emitting element (LED package) 1a, a reflector 1b, and a thermal interface material 1d of a lighting device according to a sixth embodiment. Specifically, FIG. 8(A) is an enlarged cross-sectional view of a light emitting element (LED package) 1a, a reflector 1b, and a thermal interface material 1d of a lighting device according to a sixth embodiment viewed from the front. FIG. 8(B) is a bottom view of these components, that is, a view of these components viewed from the lower side of FIG. 8(A) .

In the lighting device according to the sixth embodiment, as shown in FIG. 8(A) and FIG. 8(B), on the reflective surface 1b1 of the reflector 1b, there are provided: a portion 1b1a where the light storage material is arranged, and a portion where the light storage material is not arranged. Part 1b1b of.

Specifically, in the lighting device 10 according to the fifth embodiment, as shown in FIG. 7(A) and FIG. However, in the lighting device of the sixth embodiment, instead, as shown in FIG. 8(A) and FIG. On the reflective surface 1b1 of 1b, a portion 1b1a in which the light storage material is disposed is formed.

Fig. 9 is an enlarged view of a light emitting element (LED package) 1a, a reflector 1b, a thermal interface material 1d, and the like of a lighting device according to a seventh embodiment. Specifically, FIG. 9(A) is an enlarged cross-sectional view of a light emitting element (LED package) 1a, a reflector 1b, a thermal interface material 1d, and the like of the lighting device according to the seventh embodiment viewed from the front. FIG. 9(B) is a bottom view of these components, that is, a view of these components viewed from the lower side of FIG. 9(A) .

In the lighting device 10 according to the fifth embodiment, as shown in FIGS. The part 1b1a of the light storage material, however, in the lighting device of the seventh embodiment, instead, as shown in FIG. 9(A) and FIG. On the reflective surface 1b1 of 1b, a portion where the light storage material is arranged is formed.

As a result, in the lighting device of the seventh embodiment, as in the lighting device 10 of the fifth embodiment, a portion (1g) where the light storage material is placed and a portion where the light storage material is not placed are provided on the reflection surface 1b1 of the reflector 1b. .

Fig. 10 is an enlarged view of a light emitting element (LED package) 1a, a reflector 1b, a thermal interface material 1d, and the like of a lighting device according to an eighth embodiment. Specifically, FIG. 10(A) is an enlarged cross-sectional view of a light emitting element (LED package) 1a, a reflector 1b, a thermal interface material 1d, and the like of a lighting device according to the eighth embodiment viewed from the front. FIG. 10(B) is a bottom view of these components, that is, a view of these components viewed from the lower side of FIG. 10(A) .

In the lighting device 10 according to the fifth embodiment, as shown in FIGS. The part 1b1a of the light storage material, however, in the lighting device of the eighth embodiment, instead, as shown in FIG. 10(A) and FIG. The inner peripheral surface 1b2 of the device 1b forms a portion where the light storage material is arranged.

Specifically, in the lighting device according to the eighth embodiment, light from the LED 1a1 (see FIG. 6 ) and the fluorescent substance 1a2 is accumulated by the light storage material on the inner peripheral surface 1b2 of the reflector 1b exposed through the hole 1i1 of the thin plate 1i. Light. In addition, the portion 1i2 of the inner peripheral surface of the thin plate 1i where the hole 1i1 is not opened is mirror-like, and has a function of reflecting light from the LED 1a1 and the phosphor 1a2 when the LED 1a1 is turned on.

As a result, in the illuminating device of the eighth embodiment, as in the illuminating device 10 of the fifth embodiment, on the reflective surface of the reflector 1b are provided: the part (1b2, 1i1) where the light storage material is arranged, and the part (1b2, 1i1) where the light storage material is not arranged. Part of the material (1i2).

Fig. 11 is an enlarged view of a reflector 1b of a lighting device according to a ninth embodiment. Specifically, FIG. 11(A) is an enlarged cross-sectional view of the reflector 1b of the lighting device according to the ninth embodiment seen from the front. FIG. 11(B) is a bottom view of the component, that is, a view of the component viewed from the lower side of FIG. 11(A).

In the lighting device 10 according to the fifth embodiment, as shown in FIGS. The part 1b1a of the light storage material, however, in the lighting device of the ninth embodiment, instead, as shown in FIG. 11(A) and FIG. 0% and lower than 100%) form the reflector 1b, so that the portion where the light storage material is disposed is formed on the reflective surface 1b1 of the reflector 1b. Specifically, in the lighting device according to the ninth embodiment, the reflector 1b is formed of a high-reflectivity white resin material to which a light storage material is added.

As a result, in the illuminating device of the ninth embodiment, as in the illuminating device 10 of the fifth embodiment, the reflective surface 1b1 of the reflector 1b is provided with a portion where the light storage material is placed and a portion where the light storage material is not placed.

According to the lighting device of the ninth embodiment, there is no need to apply or paste the light storage material, and the same effects as those of the lighting devices of the fifth to eighth embodiments can be obtained.

Next, a lighting device according to a tenth embodiment will be described with reference to FIGS. 12 and 13 . The lighting device of the tenth embodiment is the same as the lighting devices of the first and fifth embodiments except for the structure of the light emitting element.

12 is a cross-sectional view of a light emitting element module of a lighting device according to a tenth embodiment. In FIG. 12 , 10 a denotes a light emitting element (LED package) having the same configuration as the light emitting element (LED package) 1 a shown in FIG. 6 . 10b denotes a reflector having a reflective surface for reflecting light emitted from the light emitting element (LED package) 10a upward (upper side in FIG. 12 ). 10c denotes a lens attached to the reflector 10b for controlling light distribution of direct light from the light emitting element (LED package) 10a and reflected light from the reflective surface of the reflector 10b.

Also, in FIG. 12, 10d denotes a thermal interface material for discharging or thermally conducting heat generated by the light emitting element (LED package) 10a. 1Oe denotes a housing for supporting reflector 10b and thermal interface material 1Od.

In the lighting device according to the tenth embodiment, as shown in FIG. 12 , part of the heat generated by the light emitting element (LED package) 10 a is discharged from the thermal interface material 10 d. And, part of the heat generated by the light emitting element (LED package) 10a is thermally conducted to the case 10e via the thermal interface material 10d, and released from the surface of the case 10e.

Fig. 13 is a component diagram of the reflector 10b shown in Fig. 12 . Specifically, FIG. 13(A) is a plan view of the reflector 10b, and FIG. 13(B) is a cross-sectional view of the reflector 10b.

In the lighting device of the tenth embodiment, as shown in FIG. 13(A) and FIG. 13(B), on the reflective surface 10b1 of the reflector 10b, there are provided: a portion 10b1a where the light storage material is arranged, and a portion where the light storage material is not arranged. Part 10b1b. Specifically, the portion 10b1a where the light storage material is arranged is formed by applying the light storage material in a grid pattern on the reflective surface 10b1 of the reflector 10b. Then, the light storage material is applied to the entire upper surface (the upper surface in FIG. 13(B) ) of the reflector 10b. As the light storage material, the same material as that in the fifth embodiment can be used.

In addition, in the lighting device according to the tenth embodiment, as shown in FIG. 12 , part of the heat generated by the light emitting element (LED package) 10a is thermally conducted to the reflector 10b via the thermal interface material 10d, the case 10e, and the reflector 10b. The light storage material on the reflective surface 10b1 and the light storage material on the upper surface of the reflector 10b. As a result, the temperature of the light storage material rises, and the light emission intensity of the light storage material increases.

In addition, in the lighting device according to the tenth embodiment, as shown in FIG. 12 , when the LED is turned on, part of the light emitted from the LED and the phosphor is subjected to light distribution control by the lens 10 c, and is irradiated to the upper side of FIG. 12 . . And when the LED is turned on, part of the light emitted from the LED and the phosphor is reflected by the part 10b1b of the reflective surface 10b1 of the reflector 10b where no light storage material is arranged, and the light distribution is controlled by the lens 10c, and is irradiated to the upper side. And, when the LED is turned on, part of the light emitted from the LED and the phosphor, and part of the light entering the lighting device from outside the lighting device are transmitted by the light storage material on the reflecting surface 10b1 of the reflector 10b and the upper surface of the reflector 10b. The light storage material accumulates on the surface.

When the LED is turned off, light emitted from the light storage material on the reflective surface 10b1 of the reflector 10b is radiated, the light distribution is controlled by the lens 10c, and the light is irradiated to the upper side in FIG. 12 . And, when the LED is turned off, the light emitted from the light storage material on the upper surface of the reflector 10b is emitted, and is irradiated to the upper side in FIG. 12 .

In the lighting device according to the tenth embodiment, the LED is pulse-driven in consideration of the afterglow luminance of the light-storage material, and when the LED is turned off, light emission from the light-storage material is used as an auxiliary. Thereby, energy saving can be realized.

Specifically, considering the afterglow luminance of the light storage material, the afterglow time, and the time to reach saturation luminance, the LED off period is set so that the user of the lighting device does not feel the flickering feeling of the LED when the LED is off. within, to obtain the maximum brightness of the light-storing material.

In the lighting device according to the tenth embodiment, as shown in FIGS. 12 and 13 , the portion 10b1a where the light storage material is arranged is formed by applying the light storage material in a grid pattern on the reflection surface 10b1 of the reflector 10b. However, In the lighting device of the eleventh embodiment, instead, the light storage material can be coated on the reflective surface of the reflector in a dot shape, or a grid-like thin plate containing the light storage material can be pasted on the reflector, or a light storage material can be used. A thin plate with holes is used to cover the reflective surface coated with the light storage material, or a material added with the light storage material is used to form the reflector, so that the part where the light storage material is arranged is formed on the reflector.

Next, a lighting device according to a twelfth embodiment will be described with reference to FIGS. 14 and 15 . The lighting device of the twelfth embodiment is the same as the lighting devices of the first, fifth, and tenth embodiments except for the structure of the light emitting element.

Fig. 14 is a cross-sectional view of a light emitting element module of a lighting device according to a twelfth embodiment. In FIG. 14 , 20 a denotes a light emitting element (LED package) having the same configuration as the light emitting element (LED package) 1 a shown in FIG. 6 . 20b denotes a reflector having a reflective surface for reflecting light from the light emitting element (LED package) 20a upward (upper side in FIG. 14 ). 20c denotes a lens mounted on the reflector 20b for controlling light distribution of direct light from the light emitting element (LED package) 20a and reflected light from the reflective surface of the reflector 20b. 20c1 denotes the upper surface of the lens 20c, and 20c2 denotes the lower surface of the lens 20c.

In addition, in FIG. 14 , 20d represents a first thermal interface material for discharging or conducting heat generated by the light emitting element (LED package) 20a. 20j represents a second thermal interface material for discharging or conducting heat generated by the light emitting element (LED package) 20a. 20e denotes a casing for supporting the reflector 20b and the second thermal interface material 20j. 20e1 denotes a heat sink, which constitutes a part of the casing 20e. 20k denotes a flexible substrate for supplying power to the LED of the light emitting element (LED package) 20a.

In the lighting device according to the twelfth embodiment, as shown in FIG. 14 , part of the heat generated by the light emitting element (LED package) 20a is discharged from the first thermal interface material 20d. And a part of the heat generated in the light emitting element (LED package) 20a is conducted to the second thermal interface material 20j via the first thermal interface material 20d, and is released from the second thermal interface material 20j. And part of the heat generated by the light emitting element (LED package) 20a is conducted to the heat sink 20e1 of the case 20e via the first thermal interface material 20d and the second thermal interface material 20j, and is released from the heat sink 20e1.

Fig. 15 is a component diagram of the reflector 20b shown in Fig. 14 . Specifically, FIG. 15 is a plan view of the reflector 20b, and in FIG. 15, 20b2 is a hole for accommodating the first thermal interface material 20d.

In the lighting device according to the twelfth embodiment, as shown in FIG. 15 , a portion 20b1a where the light storage material is placed and a portion 20b1b where the light storage material is not placed are provided on the reflection surface 20b1 of the reflector 20b. Specifically, the portion 20b1a where the light storage material is arranged is formed by applying the light storage material in a grid pattern on the reflective surface 20b1 of the reflector 20b. As the light storage material, the same material as that in the fifth embodiment can be used.

In addition, in the lighting device according to the twelfth embodiment, as shown in FIG. 14 , part of the heat generated by the light emitting element (LED package) 20a is thermally conducted to the reflector 20b via the first thermal interface material 20d and the reflector 20b. Light storage material on surface 20b1. As a result, the temperature of the light storage material rises, and the light emission intensity of the light storage material increases.

In addition, in the lighting device according to the twelfth embodiment, as shown in FIGS. 14 and 15 , when the LED is turned on, part of the light emitted from the LED and the phosphor is controlled for light distribution by the lens 20c, and is irradiated to the light source shown in FIG. 14 . on the upper side. And, when the LED is turned on, part of the light emitted from the LED and the phosphor is reflected by the lower surface 20c2 of the lens 20c, then reflected by the part 20b1b of the reflection surface 20b1 of the reflector 20b where no light storage material is arranged, and then, by the lens 20c performs light distribution control, and illuminates the upper side of FIG. 14 . Then, when the LED is turned on, part of the light emitted from the LED and the phosphor, and part of the light entering the lighting device from outside the lighting device are accumulated by the light storage material on the reflective surface 20b1 of the reflector 20b.

When the LED is turned off, the light emitted by the light storage material on the reflective surface 20b1 of the reflector 20b is radiated, the light distribution is controlled by the lens 20c, and the light is irradiated to the upper side in FIG. 14 .

In the lighting device according to the twelfth embodiment, the LED is pulse-driven in consideration of the afterglow luminance of the light-storage material, and when the LED is turned off, light emission from the light-storage material is used as an auxiliary. Thereby, energy saving can be realized.

Specifically, considering the afterglow luminance of the light storage material, the afterglow time, and the time to reach saturation luminance, the LED off period is set so that the user of the lighting device does not feel the flickering feeling of the LED when the LED is off. within, to obtain the maximum brightness of the light-storing material.

In addition, in the lighting device according to the twelfth embodiment, as shown in FIG. 15 , the portion 20b1a where the light storage material is arranged is formed by applying the light storage material in a grid pattern on the reflective surface 20b1 of the reflector 20b. However, as In the thirteenth embodiment, instead, the light storage material can be coated on the reflective surface of the reflector in a dot shape, or a grid-like thin plate containing the light storage material can be pasted on the reflector, or covered with a thin plate with holes. The reflective surface coated with the light storage material, or the reflector is formed from a material added with the light storage material, so that the portion where the light storage material is arranged is formed on the reflector.

The first to thirteenth embodiments described above can be combined as appropriate.

Industrial availability

The lighting device of the present invention can be applied to road lighting, street lights, indoor lighting, and the like, for example.

Claims (11)

1. lighting device, this lighting device comprises: the light-emitting device module with light-emitting component, be used to install the installing component of a plurality of light-emitting device modules, and the support component that is used to support described installing component, described installing component bends to a plurality of stages, make and point to a plurality of different directions from the light that is installed in a plurality of light-emitting device modules on the described installing component, this lighting device is characterised in that, described installing component bends to a plurality of stages according to following: make the key light axis of the light-emitting device module on the front part that is installed in described installing component and the formed angle of horizontal plane key light axis and the formed angle of horizontal plane less than the light-emitting device module on the bottom side portion that is installed in described installing component.

2. lighting device according to claim 1, it is characterized in that, be installed in the front side of key light orientation of its axis lighting device of the light-emitting device module on the front part of described installing component away from the position of lighting device, be installed in the front side of key light orientation of its axis lighting device of the light-emitting device module on the bottom side portion of described installing component position near lighting device.

3. lighting device according to claim 2, it is characterized in that, be provided with the lens that are used to make from the light optically focused of described light-emitting component radiation, the optically focused characteristic of described lens is configured to: the optically focused degree of left and right directions that makes lighting device is less than the optically focused degree of the fore-and-aft direction of lighting device.

4. lighting device according to claim 3 is characterized in that described installing component is divided into a plurality of subregions, and the light-emitting device module that quantity is lacked than the number of partitions of described installing component is installed on described installing component.

5. lighting device according to claim 1 is characterized in that,

Use LED as described light-emitting component;

Described lighting device is provided with: be configured to cover the fluorophor of described LED, and have the reflector that is used to reflect from the reflection of light face of described LED and described fluorophor;

Described reflecting surface is provided with: dispose the part of light-storing material, and the part that does not dispose light-storing material.

6. lighting device according to claim 5 is characterized in that, light-storing material is latticed or point-like is coated on the described reflecting surface.

7. lighting device according to claim 5 is characterized in that, is pasted with the latticed thin plate that comprises light-storing material on described reflecting surface.

8. lighting device according to claim 5 is characterized in that, the described reflector that is coated with light-storing material is covered by the thin plate with hole.

9. lighting device according to claim 5 is characterized in that described reflector is formed by the material that is added with light-storing material.

10. according to each described lighting device in the claim 5～9, it is characterized in that, between described LED and described fluorophor and described light-storing material, dispose heat transfer component.

11. lighting device according to claim 10 is characterized in that, equipped with radiator between described LED and described fluorophor and described light-storing material.

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