WO2012093734A1

WO2012093734A1 - Illumination device

Info

Publication number: WO2012093734A1
Application number: PCT/JP2012/050230
Authority: WO
Inventors: 英俊三塚; 斎藤　浩
Original assignee: 株式会社ティ・エム・エフ・クリエイト; 株式会社ティ・エム・エフ・アース
Priority date: 2011-01-07
Filing date: 2012-01-10
Publication date: 2012-07-12
Also published as: JP2012156123A

Abstract

In the disclosed illumination device, each LED element (11) is arranged with the optical axis oriented straight up, a first reflective surface (21) is arranged above said LED element, and a ridgeline (21b) of the first reflective surface (21) protrudes downwards. Further, the first reflective surface (21) is arranged in the space between a pair of second reflective surfaces (22), and light reflected by the first reflective surface (21) is reflected again by the second reflective surfaces (22). Light from the LED elements (11) not reflected by the first reflective surface (21) is reflected by the second reflective surface, and the light not reflected by the second reflective surface (22) is irradiated towards an irradiation position on the floor, etc., of a room.

Description

Lighting equipment

The present invention relates to an illumination device using an LED element.

A conventional indoor lighting device includes a fluorescent tube and an umbrella or a reflector disposed on the back side of the fluorescent tube. Light emitted from the front of the fluorescent tube is directly irradiated into the room, and the fluorescent tube It is known that light radiated from the back side is reflected by an umbrella or a reflector and is radiated supplementarily into the room (for example, see Utility Model Registration No. 312998 and JP-A-2008-300230). ).

On the other hand, in recent years, from the viewpoint of energy saving and longer life, it has been studied to replace a fluorescent tube with a straight tube type light source in which a plurality of LED elements are arranged in parallel (for example, Japanese Patent Application Laid-Open No. 2010-113055). reference.). However, while fluorescent tubes have omnidirectional directional characteristics, LED elements have directional characteristics that irradiate strong light only in a certain angular range, so a plurality of LED elements are simply arranged in a row. Just arranging them is not a substitute for fluorescent tubes. For this reason, a straight tube type light source in which a plurality of LED elements are arranged side by side and the optical axes of the LED elements in each row are shifted from each other is known (see, for example, Design Registration No. 1203169). .

However, even when the LED elements are arranged in a plurality of rows as described above, it does not become almost uniform directivity characteristics in all directions like a fluorescent lamp, and a certain irradiation angle range of each LED element, particularly There is no change in the vicinity of the optical axis being brighter than the other ranges. For this reason, unevenness in illuminance easily occurs at the irradiation position, and some people feel uncomfortable when replacing the fluorescent lamp.

Furthermore, in recent years, from the viewpoint of energy saving and longer life, it has been studied to use a straight tube type fluorescent lamp using a cold cathode tube (CCFL tube) instead of a normal fluorescent lamp (for example, a special fluorescent lamp). (See JP 2010-251261). The fluorescent lamp includes a plurality of cold cathode tubes extending in a predetermined direction, a flat reflector extending along the cold cathode tubes, and a light transmitting member extending along the cold cathode tubes. A cold cathode tube is disposed between the reflector and the translucent cover.

The driving power of the cold cathode tube is smaller than that of a normal fluorescent tube having a diameter of 28 mm or 32.5 mm, and the cold cathode tube is superior to the normal fluorescent tube in terms of life, so energy saving and This is advantageous in terms of extending the life. However, the cold cathode tube has a diameter of several millimeters and its light emission is considerably inferior to that of a normal fluorescent tube. Therefore, it has been conventionally considered that a cold cathode tube is not suitable for indoor lighting. It has been used only for low-illuminance applications such as LCD screen backlights.

For this reason, in recent years, in order to improve the light emission amount of a straight tube type fluorescent lamp using a cold cathode tube, research and development have been conducted on improving the light emission amount of the cold cathode tube itself. However, due to factors such as the light emission method and the diameter of the cold cathode tube, the amount of light emitted from the cold cathode tube itself cannot be improved easily. For this reason, even now, the amount of light emitted by a straight tube type fluorescent lamp using a cold cathode tube is considerably inferior to that of a normal fluorescent tube.

The present invention has been made in view of the above-described problems, and an object of the present invention is to provide an illuminating device that can save energy and has less uneven illuminance at an irradiation position.

Also, an object of the present invention is to provide an illumination device that can save energy while ensuring illuminance at an irradiation position.

In order to achieve the above object, the illumination device of the present invention includes a plurality of LED elements arranged in parallel in a predetermined direction and a pair of surfaces extending in the parallel arrangement direction of the LED elements, and the pair of surfaces intersect. A convex ridge line is formed in the portion toward each LED element side, and is arranged so as to receive light within a light irradiation angle range within 10 ° with respect to the optical axis of each LED element among the light from each LED element. The pair of surfaces intersect each other in the vicinity of the ridge line with the first reflecting surface forming an angle of 60 ° or more and 120 ° or less, the optical axis of each LED element, and the parallel arrangement direction of the LED elements And a pair of second reflecting surfaces provided on both outer sides of the first reflecting surface, and the pair of second reflecting surfaces are arranged in the space between them. Are arranged and the light reflected by the first reflecting surface and each LED element It reflects the light that is directly irradiated from.

Thus, light within a light irradiation angle range of 10 ° or less with respect to the optical axis of each LED element is received by the pair of surfaces of the first reflecting surface, and the portion where the pair of surfaces intersects each LED element side And a pair of surfaces of the first reflecting surface form an angle of 60 ° to 120 ° with each other in the vicinity of the ridge line, so that the light from each LED element is the first reflecting surface. Most of the reflected light travels outward so as to form an angle corresponding to the inclination angle of the first reflecting surface (for example, an angle of 45 ° or more) with respect to the optical axis of each LED element. It will be. In addition, a pair of second reflecting surfaces are provided on both outer sides of the first reflecting surface, and the first reflecting surface is disposed in a space between the pair of second reflecting surfaces. The reflected light is further reflected by the second reflecting surface, and the light not irradiated on the first reflecting surface among the light from each LED element is reflected by the second reflecting surface.

For example, when this lighting device is attached to a ceiling in a room, each LED element is arranged so that the optical axis faces directly above, and a first reflecting surface is arranged above the LED element, and the first reflecting surface The ridge line is convex downward. In addition, a first reflection surface is disposed in a space between the pair of second reflection surfaces, and light reflected by the first reflection surface is further reflected by the second reflection surface, and light from each LED element. The light which is not irradiated to the 1st reflective surface is reflected by the 2nd reflective surface, and the light reflected by the 2nd reflective surface is irradiated toward irradiation positions, such as an indoor floor.

Thus, the strong light around the optical axis among the light emitted from each LED element is reflected by the first reflecting surface, and most of the reflected light is first reflected with respect to the optical axis of each LED element. The light travels outward so as to form an angle corresponding to the inclination angle of the surface, and the light is irradiated to the irradiation position such as the floor by the second reflecting surface. For this reason, by adjusting the specification of the second reflecting surface as appropriate, it is possible to reduce the unevenness of illuminance at the irradiation position as compared with the case where the light of each LED element is directly applied to the irradiation position such as the floor. it can.

Further, even if each LED element is arranged so that the optical axis faces directly above the indoor ceiling, strong light around the optical axis is reflected by the first reflecting surface among the light emitted from each LED element, and the reflection thereof. The irradiated light is irradiated to the irradiation position such as the floor by the second reflection surface, and the light directly irradiated to the second reflection surface from each LED element is also reflected toward the irradiation position such as the floor. For this reason, the light from each LED element can be efficiently irradiated to irradiation positions, such as a floor. That is, it is extremely advantageous for energy saving while ensuring the illuminance at the irradiation position.

The lighting device of the present invention is composed of a plurality of LED elements arranged in parallel in a predetermined direction and a translucent material, extends in the direction in which the LED elements are arranged, and covers the plurality of LED elements. A light source that emits light in a predetermined light irradiation angle range in a direction orthogonal to the direction in which the LED elements are arranged, and extends in the direction in which the LED elements of the light source are arranged Convex ridges are formed toward the light source side at the intersection of the pair of surfaces, and 10 ° with respect to the center of the light irradiation angle range of the light emitted from the light source. A first reflecting surface that is disposed so as to receive light within a range, and the pair of surfaces form an angle of 60 ° to 120 ° with each other in the vicinity of the ridgeline, and the optical axis of the LED element of the light source One that intersects and intersects the direction of LED elements And a pair of second reflecting surfaces provided on both outer sides of the first reflecting surface, and the pair of second reflecting surfaces has the first reflecting surface arranged in a space between them, The light reflected by the first reflecting surface and the light directly irradiated from the light source are reflected.

As described above, light within a range of 10 ° with respect to the center of the light irradiation angle range of the light source is received by the pair of surfaces of the first reflecting surface, and the portion where the pair of surfaces intersects each LED element side. A convex ridge line is formed, and the pair of surfaces of the first reflection surface form an angle of 60 ° or more and 120 ° or less with each other in the vicinity of the ridge line, so that the light from each LED element is reflected by the first reflection surface Most of the reflected light travels outward so as to form an angle corresponding to the inclination angle of the first reflecting surface (for example, an angle of 45 ° or more) with respect to the optical axis of each LED element. become. In addition, a pair of second reflecting surfaces are provided on both outer sides of the first reflecting surface, and the first reflecting surface is disposed in a space between the pair of second reflecting surfaces. The reflected light is further reflected by the second reflecting surface, and light that is not irradiated on the first reflecting surface among the light from the light source is reflected by the second reflecting surface.

As described above, the strong light near the center of the light irradiation range among the light emitted from the light source is reflected by the first reflecting surface, and most of the reflected light is first reflected with respect to the optical axis of each LED element. The light travels outward so as to form an angle corresponding to the inclination angle of the surface, and the light is irradiated to the irradiation position such as the floor by the second reflecting surface. For this reason, by adjusting the specification of the second reflecting surface as appropriate, it is possible to reduce the unevenness of illuminance at the irradiation position as compared with the case where the light of each LED element is directly applied to the irradiation position such as the floor. it can.

Further, even if each LED element is arranged so that the optical axis is directly above the indoor ceiling, strong light in the vicinity of the center of the light irradiation range is reflected by the first reflecting surface among the light emitted from the light source, and the reflection thereof. The irradiated light is irradiated to the irradiation position such as the floor by the second reflecting surface, and the light directly irradiated to the second reflecting surface from the light source is also reflected toward the irradiation position such as the floor. For this reason, the light from each LED element can be efficiently irradiated to irradiation positions, such as a floor. That is, it is extremely advantageous for energy saving while ensuring the illuminance at the irradiation position.

The lighting device of the present invention is composed of a plurality of LED elements arranged in parallel in a predetermined direction and a translucent material, extends in the direction in which the LED elements are arranged, and covers the plurality of LED elements. A light source that emits light in a predetermined light irradiation angle range in a direction orthogonal to the direction in which the LED elements are arranged, and extends in the direction in which the LED elements of the light source are arranged A ridge line that is convex toward the light source side is formed at a portion where the pair of surfaces intersect, and the ridge line is disposed substantially at the center of the light irradiation angle range of the light source. First surfaces having an angle of 60 ° to 120 ° with each other in the vicinity of the ridgeline, having a predetermined width dimension in a direction orthogonal to the optical axis of the LED elements and orthogonal to the juxtaposed direction of the LED elements Crosses the reflective surface and the optical axis of the LED element of the light source. And a pair of second reflecting surfaces provided on both outer sides of the first reflecting surface in a direction intersecting with the parallel arrangement direction of the LED elements, and the ridgeline of the first reflecting surface and the light source of the light source The distance from the translucent cover is less than or equal to one time the predetermined width dimension of the first reflecting surface, and the pair of second reflecting surfaces is arranged with the first reflecting surface in the space between them, The light reflected by the first reflecting surface and the light directly irradiated from the light source are reflected.

In this way, a convex ridge line is formed toward the LED element side of the light source at a portion where the pair of surfaces of the first reflecting surface intersect, and the ridge line is disposed at the approximate center of the light irradiation range of the light source, Since the pair of surfaces of the first reflecting surface form an angle of 60 ° to 120 ° in the vicinity of the ridgeline, the light from each LED element of the light source is reflected by the first reflecting surface, and the reflected light Most of the light travels outward so as to form an angle corresponding to the tilt angle of the first reflecting surface (for example, an angle of 45 ° or more) with respect to the optical axis of the light source. The first reflective surface has a pair of second reflective surfaces provided on both outer sides of the first reflective surface, and the first reflective surface is disposed in a space between the pair of second reflective surfaces. The light reflected by the reflecting surface is further reflected by the second reflecting surface, and the light that is not irradiated on the first reflecting surface among the light from each LED element of the light source is reflected by the second reflecting surface. ing.

For example, when this lighting device is attached to a ceiling in a room, a light source is disposed so that the optical axis of each LED element faces upward, and a first reflecting surface is disposed above the light source. The ridge line is convex downward. In addition, the first reflecting surface is disposed in a space between the pair of second reflecting surfaces, and the light reflected by the first reflecting surface is further reflected by the second reflecting surface, and from each LED element of the light source The light that is not irradiated on the first reflecting surface is reflected by the second reflecting surface, and the light reflected by the second reflecting surface is irradiated toward a predetermined irradiation position such as an indoor floor.

In this way, strong light near the center of the light irradiation range among the light emitted from the light source is reflected by the first reflecting surface, and most of the reflected light is first with respect to the optical axis of each LED element of the light source. The light advances toward the outside so as to form an angle corresponding to the inclination angle of the reflection surface, and the light is irradiated to a predetermined irradiation position such as a floor by the second reflection surface. For this reason, by adjusting the specification of the second reflecting surface as appropriate, the unevenness of illuminance at the irradiation position is reduced as compared with the case where the light of each LED element is directly irradiated toward the irradiation position such as the floor. be able to.

Further, even if each LED element is arranged so that the optical axis is directly above the indoor ceiling, strong light in the vicinity of the center of the light irradiation range is reflected by the first reflecting surface among the light emitted from the light source, and the reflection thereof. The irradiated light is irradiated to a predetermined irradiation position such as a floor by the second reflecting surface, and the light directly irradiated to the second reflecting surface from the light source is also reflected toward the predetermined irradiation position such as the floor. For this reason, the light from each LED element of a light source can be efficiently irradiated to predetermined irradiation positions, such as a floor. That is, it is extremely advantageous for energy saving while ensuring the illuminance at the irradiation position.

The lighting device of the present invention comprises a fluorescent tube extending in a predetermined direction, an in-lamp reflector extending along the fluorescent tube, and a translucent material in the extending direction of the fluorescent tube. A predetermined light irradiation angle range in a direction perpendicular to the extending direction of the fluorescent tube, the fluorescent tube being disposed between the reflecting plate and the transparent cover. And a pair of surfaces extending in the extending direction of the fluorescent tube of the fluorescent lamp, and a ridge line convex toward the fluorescent lamp side is formed at the intersection of the pair of surfaces. And arranged so as to receive light within a range of 10 ° with respect to the center of the light irradiation angle range of the light emitted from the fluorescent lamp, and the pair of surfaces are 60 ° to each other in the vicinity of the ridgeline. A first reflection surface having an angle of 120 ° or less and the fluorescent run And a pair of second reflecting surfaces provided on both outer sides of the first reflecting surface in a direction orthogonal to the extending direction of the fluorescent tube, and the pair of second reflecting surfaces is a space between them. The first reflecting surface is disposed on the first reflecting surface to reflect light reflected by the first reflecting surface and light directly emitted from the fluorescent lamp.

Thus, a convex ridge line is formed toward the fluorescent lamp side at a portion where the pair of surfaces of the first reflecting surface intersect, and the ridge line is within 10 ° with respect to the center of the light irradiation angle range of the fluorescent lamp. Since the pair of surfaces of the first reflecting surface form an angle of 60 ° to 120 ° in the vicinity of the ridgeline, the light from the fluorescent lamp is arranged to receive the light in the range of Most of the reflected light travels outward so as to form an angle corresponding to the inclination angle of the first reflecting surface (for example, an angle of 45 ° or more) with respect to the optical axis surface of the fluorescent lamp. It will be. The first reflective surface has a pair of second reflective surfaces provided on both outer sides of the first reflective surface, and the first reflective surface is disposed in a space between the pair of second reflective surfaces. The light reflected by the reflecting surface is further reflected by the second reflecting surface, and the light directly irradiated from the fluorescent lamp is also reflected by the second reflecting surface.

For example, when this lighting device is attached to a ceiling in a room, a fluorescent lamp is disposed so that the optical axis surface faces upward, a first reflecting surface is disposed above the fluorescent lamp, and a ridgeline of the first reflecting surface Becomes convex downward. The first reflecting surface is disposed in the space between the pair of second reflecting surfaces, and the light reflected by the first reflecting surface is further reflected by the second reflecting surface and directly irradiated from the fluorescent lamp. The reflected light is also reflected by the second reflecting surface, and the light reflected by the second reflecting surface is irradiated toward a predetermined irradiation position such as an indoor floor.

Therefore, it is possible to efficiently irradiate a predetermined irradiation position such as a floor with light from the fluorescent lamp, which is extremely advantageous in achieving energy saving while ensuring illuminance at the irradiation position.

The lighting device of the present invention extends in a predetermined direction and extends along the fluorescent tube that irradiates light in a light irradiation angle range of 360 ° in a direction orthogonal to the extending direction. And a reflector that receives light in a predetermined light irradiation angle range of light emitted from the fluorescent tube, and extends the fluorescent tube. Convex ridges are formed toward the fluorescent tube at the intersection of the pair of surfaces extending in the direction, and the predetermined light irradiation angle of the light irradiated from the fluorescent tube A first reflecting surface disposed so as to receive light in a range within 10 ° with respect to the center of the range, and the pair of surfaces having an angle of 60 ° to 120 ° with each other in the vicinity of the ridgeline; The first reflecting surface in a direction orthogonal to the extending direction of the fluorescent tube A pair of second reflecting surfaces provided on both outer sides, and the pair of second reflecting surfaces are arranged such that the first reflecting surface is disposed in a space between them, and is reflected from the first reflecting surface. The reflected light and the light directly irradiated from the fluorescent tube are reflected.

Thus, a convex ridge line is formed toward the fluorescent tube side at a portion where the pair of surfaces of the first reflecting surface intersect, and the ridge line is within 10 ° with respect to the center of the predetermined light irradiation angle range. The pair of surfaces of the first reflecting surface form an angle of 60 ° to 120 ° in the vicinity of the ridge line, so that the light from the fluorescent tube is the first reflecting surface. Most of the reflected light travels outward so as to form an angle corresponding to the inclination angle of the first reflecting surface (for example, an angle of 45 ° or more) with respect to the central surface. . The first reflective surface has a pair of second reflective surfaces provided on both outer sides of the first reflective surface, and the first reflective surface is disposed in a space between the pair of second reflective surfaces. The light reflected by the reflecting surface is further reflected by the second reflecting surface, and the light directly irradiated from the fluorescent lamp is also reflected by the second reflecting surface.

For example, when the lighting device is attached to an indoor ceiling, the fluorescent tube is disposed so that the central surface faces upward, the first reflecting surface is disposed above the fluorescent tube, and the ridge line of the first reflecting surface Becomes convex downward. The first reflecting surface is disposed in the space between the pair of second reflecting surfaces, and the light reflected by the first reflecting surface is further reflected by the second reflecting surface and directly irradiated from the fluorescent tube. The reflected light is also reflected by the second reflecting surface, and the light reflected by the second reflecting surface is irradiated toward a predetermined irradiation position such as an indoor floor.

Therefore, it is possible to efficiently irradiate a predetermined irradiation position such as a floor with light from the fluorescent tube, which is extremely advantageous in achieving energy saving while ensuring illuminance at the irradiation position.

The present invention also includes a fluorescent tube extending in a predetermined direction, a reflector extending along the fluorescent tube, and a translucent material and extending in the extending direction of the fluorescent tube. A fluorescent lamp in which the fluorescent tube is disposed between the reflective plate and the transparent cover, the reflective plate extending in the extending direction of the fluorescent tube And a first reflecting surface in which a convex ridge line is formed toward the fluorescent tube side at a portion where the pair of surfaces intersect, and the first reflecting surface in a direction orthogonal to the extending direction of the fluorescent tube. A pair of second reflecting surfaces provided on both sides of the reflecting surface, and the pair of second reflecting surfaces is arranged such that the first reflecting surface is disposed in a space between them. And the light directly irradiated from the fluorescent tube are reflected.

Thus, since the convex ridge line is formed toward the fluorescent tube side at the portion where the pair of surfaces of the first reflective surface intersect, the light from the fluorescent tube is reflected by the first reflective surface, Most of the reflected light travels outward so as to form an angle corresponding to the inclination angle of the first reflecting surface. The first reflection surface has a pair of second reflection surfaces provided on both sides of the first reflection surface, and the first reflection surface is disposed in a space between the pair of second reflection surfaces. The light reflected by the surface is further reflected by the second reflecting surface, and the light directly irradiated from the fluorescent tube is also reflected by the second reflecting surface.

For example, when this fluorescent lamp is mounted on the ceiling of a room, the first reflecting surface is disposed above the fluorescent tube, and the ridge line of the first reflecting surface is convex downward. The first reflecting surface is disposed in the space between the pair of second reflecting surfaces, and the light reflected by the first reflecting surface is further reflected by the second reflecting surface and directly irradiated from the fluorescent tube. The reflected light is also reflected by the second reflecting surface, and the light reflected by the second reflecting surface is irradiated toward a predetermined irradiation position such as an indoor floor through the light transmitting cover.

According to the present invention, it is possible to provide an illuminating device that can save energy and has less uneven illuminance at the irradiation position. Moreover, energy saving can be achieved while ensuring the illuminance at the irradiation position.

It should be noted that the features of the present invention other than those described above, as well as significant actions and effects, will become clearer to those skilled in the art by referring to the following description of the embodiments and drawings illustrating the principle of the present invention.

Sectional drawing of the principal part of the illuminating device of 1st Embodiment of this invention. Cross section of the lighting device Bottom view of lighting device Top view of light source Bottom view of light source Perspective view of lighting device Schematic of the room where the lighting device is installed Explanation of operation of lighting device Sectional drawing of the principal part of the illuminating device of 2nd Embodiment of this invention. Explanation of operation of lighting device Sectional drawing of the principal part of the illuminating device of 3rd Embodiment of this invention. Explanation of operation of lighting device Sectional drawing of the principal part of the illuminating device of 4th Embodiment of this invention. Explanation of operation of lighting device Sectional drawing of the principal part of the illuminating device of 5th Embodiment of this invention. Explanation of operation of lighting device Sectional drawing of the principal part of the illuminating device of 6th Embodiment of this invention. Explanation of operation of lighting device Sectional drawing of the principal part of the illuminating device of 7th Embodiment of this invention. Explanation of operation of lighting device Table showing experimental results Schematic showing experimental method Cross-sectional view of main parts of a lighting device of a comparative example Sectional drawing of the principal part of the illuminating device which shows the 1st modification of 1st Embodiment. Sectional drawing of the principal part of the illuminating device which shows the 2nd modification of 1st Embodiment. Sectional drawing of the principal part of the illuminating device which shows the 3rd modification of 1st Embodiment. Sectional drawing of the principal part of the illuminating device which shows the 4th modification of 1st Embodiment. Sectional drawing of the principal part of the illuminating device which shows the 5th modification of 1st Embodiment. Sectional drawing of the principal part of the illuminating device which shows the 6th modification of 1st Embodiment. Use state explanatory drawing of the illuminating device of 1st Embodiment. Sectional drawing of the principal part of the illuminating device of 8th Embodiment of this invention. Cross section of the lighting device Bottom view of lighting device Top view of fluorescent lamp Bottom view of fluorescent lamp Cross section of the main part of the fluorescent lamp Explanation of operation of lighting device Table showing experimental results Cross-sectional view of main parts of a lighting device of a comparative example Sectional drawing of the principal part of the illuminating device which shows the 1st modification of 8th Embodiment. Sectional drawing of the principal part of the illuminating device which shows the 2nd modification of 8th Embodiment. Sectional drawing of the principal part of the illuminating device which shows the 3rd modification of 8th Embodiment. Sectional drawing of the principal part of the illuminating device of 15th Embodiment of this invention. Sectional drawing of the principal part of the illuminating device of 16th Embodiment of this invention. Sectional drawing of the principal part of the illuminating device of 17th Embodiment of this invention. Table showing experimental results Sectional drawing of the principal part of the illuminating device of 18th Embodiment of this invention.

The illumination device according to the first embodiment of the present invention will be described with reference to FIGS. In this embodiment, as shown in FIGS. 1, 3 and 6, the direction in which the LED elements are arranged in parallel is the X direction, and the direction perpendicular to the LED elements in the arranged direction and substantially perpendicular to the optical axis of the light source is the Y direction. To do.

The lighting device includes a straight tube type light source 10 and a reflector 20 as shown in FIGS.

As the light source 10, a known straight tube type LED light source disclosed in, for example, Japanese Patent Application Laid-Open Nos. 2010-192242 and 2010-212043 can be used. In the present embodiment, the LED elements 11 are arranged in parallel in a predetermined direction (X direction) and a known translucent material such as synthetic plastic or glass, and extend in the direction in which the LED elements 11 are arranged. The translucent light is provided so as to cover the plurality of LED elements 11 and has a predetermined width dimension W1 in a direction (Y direction) orthogonal to the parallel arrangement direction of the LED elements 11 and substantially orthogonal to the optical axis of the light source 10. A cover 12, a substrate 13 on which a plurality of LEDs 11 are mounted, a heat sink 14 that is in contact with the surface of the substrate 13 opposite to the mounting surface of the LEDs 11, and forms a part of the outer peripheral surface of the light source 10; 10 has caps 15 provided at both ends in the longitudinal direction, and two terminals 15a provided at each of the caps 15, respectively. In this embodiment, although the width dimension W1 of the translucent cover 12 is 28 mm, the translucent cover 12 of the other width dimension W1 can also be used. Further, the light source 10 is a type in which the light diffusion of each LED element 11 by the light transmission cover 12 is small, but a light transmission cover of a type in which the light diffusion of each LED element 11 is large is also applied to the present embodiment. Is possible. Further, in the present embodiment, the chip-type LED element 10 is used, but a bullet-type or other types of LED elements can also be used. The heat sink 14 is made of a metal material such as aluminum, for example, and has a plurality of heat radiation fins 14 a extending in the longitudinal direction of the light source 10 at positions that constitute the outer peripheral surface of the light source 10. The light source 10 is attached to the indoor ceiling by inserting the terminal 15a of each base 15 into a socket 100 provided on the indoor ceiling. Further, when the light source 10 is attached to the ceiling in the room, each LED element 11 of the light source 10 is attached so as to face directly above. That is, the optical axis of each LED element 11 of the light source 10 faces directly above, and the heat sink 14 of the light source 10 is positioned below the light source 10. As the socket 100, an existing socket for attaching a fluorescent lamp can be used as it is, and the base 15 or the substrate 13 is provided with a circuit for converting an alternating current into a direct current suitable for each LED 11.

The reflection plate 20 is formed by bending a metal plate such as aluminum and has a first reflection surface 21 and a pair of second reflection surfaces 22. In the present embodiment, each of the reflecting

surfaces

21 and 22 is formed to have a rough surface or have irregularities so that the center line average roughness is 0.5 μm or more. For example, the surface of the aluminum plate constituting each of the reflecting

surfaces

21 and 22 is subjected to rough surface processing and anodic oxide coating processing such as shot blasting so that the center line average roughness is 0.5 μm or more. . In another example, a plurality of small concave portions are formed on the surface of the aluminum plate constituting each of the reflecting

surfaces

21 and 22 by embossing or the like, and a lath shape or a plastic shape is formed on the aluminum surface in order to improve the reflectance. The translucent material is coated with PVD or the like. Since the reflection plate 20 is attached to the ceiling of the room, when the light source 10 is attached to the socket 100, it is positioned above the light source 10. For example, it is possible to remove a conventional reflector for a fluorescent lamp and attach the reflector 20 at that position.

The first reflecting surface 21 is composed of a pair of surfaces 21a extending in the X direction. Each surface 21a is a flat surface, and a convex ridge line 21b toward the LED element 11 side of the light source 10 is formed at a portion where the pair of surfaces 21a intersect. As shown in FIGS. 1 and 2, the pair of surfaces 21 a of the first reflecting surface 21 has a predetermined light irradiation angle range α (in this embodiment, α is 25) with respect to the optical axis of each LED element 11 of the light source 10. Are arranged so as to receive light at an angle β, and form an angle β (in the present embodiment, β is 102 °) in the vicinity of the ridge line 21b. The pair of surfaces 21a may be disposed so as to receive light in the predetermined light irradiation angle range α in the Y direction. In the present embodiment, the width dimension W2 of the first reflecting surface 21 in the Y direction is 36 mm. In the present embodiment, the plurality of LED elements 11 are arranged in a line, and the center of the light irradiation range in the Y direction of the light source 10 coincides with the optical axis of the LED element 11. For this reason, the ridge line 21 b of the first reflecting surface 21 is arranged at the center of the light irradiation range in the Y direction of the light source 10. The distance D between the ridge line 21b of the first reflecting surface 21 and the light transmitting cover 12 of the light source 10 is about 1/3 of the width dimension W2 of the first reflecting surface W2.

Each second reflecting surface 22 is provided on both outer sides in the Y direction with respect to the first reflecting surface 21, and the first reflecting surface 21 is arranged in a space between the pair of second reflecting surfaces 22. Yes. Each of the second reflecting surfaces 22 includes a first surface 22a that constitutes a portion closest to the first reflecting surface 21, a second surface 22b that constitutes a portion next to the first reflecting surface 21, and Next, it has the 3rd surface 22c which comprises the part close | similar to the 1st reflective surface 21, and the 4th surface 22d which comprises the part farthest from the 1st reflective surface 21. FIG. Each of the first to fourth surfaces 22a to 22d is a flat surface and extends in the X direction. A flange portion 23 is provided at the outer end of the fourth surface 22d, and the flange portion 23 is provided for mounting to the indoor ceiling. The first surface 22a forms an angle γ1 (γ1 is 120 ° in the present embodiment) with the surface 21a of the first reflecting surface 21, and the second surface 22b forms an angle γ2 with the first surface 22a (in the present embodiment). γ2 forms 170 °), the third surface 22c forms an angle γ3 with the second surface 22b (in this embodiment, γ3 is 170 °), and the fourth surface 22d forms an angle γ4 with the third surface 22c. In this embodiment, γ4 is 170 °. In the present embodiment, the width dimensions L1 to L4 of the first to fourth surfaces 22a to 22d are each 19 mm.

As described above, in this illuminating device, light in a light irradiation angle range of 25 ° with respect to the optical axis of each LED element 11 is applied to the pair of surfaces 21a of the first reflecting surface 21, and the pair of surfaces 21a. Convex ridgelines 21b are formed at the intersections of the LED elements 11 and the pair of surfaces 21a of the first reflecting surface 21 form an angle of 102 ° in the vicinity of the ridgelines 21b. Therefore, the light from each LED element 11 is reflected by the first reflecting surface 21, and most of the reflected light is first with respect to the optical axis of each LED element 11 as shown in FIG. 8. It proceeds toward the outside so as to form an angle corresponding to the inclination angle of the reflecting surface 21 (an angle of approximately 70 ° or more). Moreover, it has a pair of 2nd reflective surface 22 provided in the both outer sides of the direction which cross | intersects the optical axis of the LED element 11 with respect to the 1st reflective surface 21, The first reflection surface 21 is disposed in the space between, the light reflected by the first reflection surface 21 is further reflected by the second reflection surface 22, and the light from the light source 10 is reflected on the first reflection surface. Light that is not irradiated is reflected by the second reflecting surface.

In addition, each LED element 11 is arranged so that the optical axis faces directly above, the first reflecting surface 21 is arranged above the LED element 11, and the ridge line 21b of the first reflecting surface 21 is convex downward. It has become. In addition, the first reflecting surface 21 is disposed in the space between the pair of second reflecting surfaces 22, and the light reflected by the first reflecting surface 21 is further reflected by the second reflecting surface 22, and each LED Of the light from the element 11, the light not irradiated on the first reflecting surface 21 is reflected by the second reflecting surface, and the light reflected by the second reflecting surface 22 is irradiated toward the irradiation position such as the indoor floor. Is done.

As described above, strong light near the center of the light irradiation range of the light source 10, that is, strong light around the optical axis of each LED element 11 in the present embodiment is reflected by the first reflecting surface 21, and the reflected light Most of the light travels outward so as to form an angle corresponding to the inclination angle of the first reflecting surface 21 with respect to the optical axis of each LED element 11, and the light is irradiated on the floor or the like by the second reflecting surface 22. The position is irradiated. For this reason, compared with the case where the light of each LED element 11 is directly irradiated to irradiation positions, such as a floor, the nonuniformity of the illumination intensity in an irradiation position can be reduced.

Moreover, even if each LED element 11 is arranged so that the optical axis faces directly above the ceiling of the room, strong light near the center of the light irradiation range of the light source 10, that is, in the case of the present embodiment, it exits from each LED element 11. Of the light, strong light around the optical axis is reflected by the first reflecting surface 21, and the reflected light is reflected by the second reflecting surface 22 toward the irradiation position such as the floor and the second reflection from the light source 10. The light directly irradiated on the surface 22 is also reflected toward the irradiation position such as the floor. For this reason, the light from each LED element 11 of the light source 10 can be efficiently irradiated to an irradiation position such as a floor.

Further, in the present embodiment, the optical axis of each LED element 11 of the light source 10 faces upward, and a heat sink 14 for preventing a temperature rise of each LED element 11 in the light source 10 is disposed below the LED element 11. ing. That is, in the light source 10, each LED element 11 is disposed on the first reflecting surface 21 side of the reflecting plate 20, and the heat sink 14 is disposed on the side away from the first reflecting surface 21. It becomes easy to hit air, and heat can be efficiently dissipated.

Further, in this embodiment, each of the reflecting

surfaces

21 and 22 is formed to have a rough surface or an unevenness by embossing or the like so that the center line average roughness is 0.5 μm or more. For this reason, the light source 10 is a set of LED elements 11 that are point light sources, and each LED element 11 has a strong directivity of light, but the light from each LED element 11 is diffused by the reflecting

surfaces

21 and 22. Is done. In particular, since the strong light around the optical axis of each LED element 11 is reflected by both the first reflecting surface 21 and the second reflecting surface 22 and irradiated to the irradiation position, the unevenness of the light at the irradiation position is reduced. Is very advantageous.

Even when each of the reflecting

surfaces

21 and 22 is mirror-finished and the center line average roughness is about 0.1 μm, when the light from each LED element 11 is reflected by each of the reflecting

surfaces

21 and 22, Not a little light from each LED element 11 is diffused by each reflecting

surface

21, 22. For this reason, compared with the case where the light of each LED element 11 is directly irradiated to irradiation positions, such as a floor, the light from each LED element 11 is spread | diffused, and the nonuniformity of the illumination intensity in an irradiation position can be reduced.

A lighting device according to a second embodiment of the present invention will be described with reference to FIGS. In the present embodiment, the angle β, the width dimension W2, and the angle γ1 of the second reflecting surface 22 of the first reflecting surface 21 of the reflecting plate 20 are changed in the first embodiment. This is the same as in the first embodiment.

As shown in FIG. 9, the pair of surfaces 21 a of the first reflecting surface 21 of the present embodiment has a predetermined light irradiation angle range α with respect to the optical axis of each LED 11 of the light source 10 (in this embodiment, α is 15). Are arranged so as to receive light at an angle β, and form an angle β (in the present embodiment, β is 60 °) in the vicinity of the ridge line 21b. The width dimension W2 of the first reflecting surface 21 in the Y direction is 23.5 mm, and the distance D between the ridge line 21b of the first reflecting surface 21 and the light transmitting cover 12 of the light source 10 is the width dimension of the light transmitting cover. It is about 1/3 of W1.

The first surface 22a of the second reflecting surface 22 forms an angle γ1 (γ1 is 110 ° in the present embodiment) with the surface 21a of the first reflecting surface 21, and the second surface 22b is the first surface 22a. The angle γ2 (γ2 is 170 ° in the present embodiment), the third surface 22c forms an angle γ3 (γ3 is 170 ° in the present embodiment) with the second surface 22b, and the fourth surface 22d is the third surface. And an angle γ4 (in this embodiment, γ4 is 170 °). In the present embodiment, the width dimensions L1 to L4 of the first to fourth surfaces 22a to 22d are each 19 mm.

Even in such a configuration, light in a light irradiation angle range of 15 ° with respect to the optical axis of each LED element 11 is reflected by the first reflecting surface 21, and most of the reflected light is shown in FIG. As shown in FIG. 10, the light advances toward the outside so as to form an angle corresponding to the inclination angle of the first reflecting surface 21 with respect to the optical axis of each LED element 11 (an angle of approximately 45 ° or more). For this reason, the illuminating device of this embodiment also has the same effect as the illuminating device of 1st Embodiment.

A lighting device according to a third embodiment of the present invention will be described with reference to FIGS. In the present embodiment, the angle β and the width dimension W2 of the first reflecting surface 21 of the reflecting plate 20 are changed in the first embodiment, and other configurations are the same as those in the first embodiment.

As shown in FIG. 11, the pair of surfaces 21 a of the first reflecting surface 21 of the present embodiment has a predetermined light irradiation angle range α (in this embodiment, α is 30) with respect to the optical axis of each LED 11 of the light source 10. Are arranged so as to receive light at an angle β (in the present embodiment, β is 120 °) in the vicinity of the ridge line 21b. The width dimension W2 of the first reflecting surface 21 in the Y direction is 40.5 mm, and the distance D between the ridge line 21b of the first reflecting surface 21 and the light transmitting cover 12 of the light source 10 is the width dimension of the light transmitting cover. It is about 1/3 of W1.

The first surface 22a of the second reflecting surface 22 forms an angle γ1 (γ1 is 120 ° in the present embodiment) with the surface 21a of the first reflecting surface 21, and the second surface 22b is the first surface 22a. The angle γ2 (γ2 is 170 ° in the present embodiment), the third surface 22c forms an angle γ3 (γ3 is 170 ° in the present embodiment) with the second surface 22b, and the fourth surface 22d is the third surface. And an angle γ4 (in this embodiment, γ4 is 170 °). In the present embodiment, the width dimensions L1 to L4 of the first to fourth surfaces 22a to 22d are each 19 mm.

Even in such a configuration, light in a light irradiation angle range of 30 ° with respect to the optical axis of each LED element 11 is reflected by the first reflecting surface 21, and most of the reflected light is shown in FIG. As shown in FIG. 12, it proceeds toward the outside so as to form an angle corresponding to the inclination angle of the first reflecting surface 21 with respect to the optical axis of each LED element 11 (an angle of approximately 65 ° or more). For this reason, the illuminating device of this embodiment also has the same effect as the illuminating device of 1st Embodiment.

A lighting device according to a fourth embodiment of the present invention will be described with reference to FIGS. The present embodiment is obtained by changing the specification of the second reflecting surface 22 of the reflecting plate 20 in the first embodiment, and the other configuration is the same as that of the first embodiment.

Each second reflecting surface 22 of the present embodiment is provided on both outer sides in the Y direction with respect to the first reflecting surface 21, and the first reflecting surface 21 is in a space between the pair of second reflecting surfaces 22. Is arranged. Each second reflecting surface 22 is formed by a portion of the inner peripheral surface of a cylinder extending in the X direction in the circumferential direction. Each first surface 22a forms an angle γ1 (in this embodiment, γ1 is 130 °) with each second reflecting surface 22.

In the illumination device configured as described above, light in a light irradiation angle range of 25 ° with respect to the optical axis of each LED element 11 is reflected by the first reflecting surface 21, and most of the reflected light is As shown in FIG. 14, it proceeds toward the outside so as to form an angle (an angle of approximately 70 ° or more) corresponding to the inclination angle of the first reflecting surface 21 with respect to the optical axis of each LED element 11. . Moreover, it has a pair of 2nd reflective surface 22 provided in the both outer sides of the direction which cross | intersects the optical axis of the LED element 11 with respect to the 1st reflective surface 21, and this pair of 2nd reflective surface 22 of The first reflection surface 21 is disposed in the space between the light, the light reflected by the first reflection surface 21 is further reflected by the second reflection surface, and the first reflection surface is irradiated among the light from the light source 10. Unapplied light is reflected by the second reflecting surface. For this reason, the illuminating device of this embodiment also has the same effect as the illuminating device of 1st Embodiment.

A lighting device according to a fifth embodiment of the present invention will be described with reference to FIGS. In the present embodiment, the specification of the first reflecting surface 21 and the angle γ1 of the second reflecting surface 22 of the reflecting plate 20 are changed in the first embodiment, and other configurations are the same as those in the first embodiment. is there.

As shown in FIG. 11, the pair of surfaces 21a of the first reflecting surface 21 of the present embodiment has a predetermined light irradiation angle range α with respect to the optical axis of each LED 11 of the light source 10 (α is 23 in this embodiment). Are arranged so as to receive light at an angle β, and form an angle β (in the present embodiment, β is 102 °) in the vicinity of the ridge line 21b. Each surface 21a has a width direction inner side surface IS extending in the X direction, and a width direction outer surface OS extending outside in the Y direction with respect to the width direction inner side surface IS and extending in the X direction. The ridge line 21b is formed at a portion where the inner surfaces IS in the width direction intersect. Further, the width direction outer side surface OS forms a predetermined angle δ (δ in this embodiment is 190 °) with the width direction inner side surface IS. Moreover, the width dimension W2 in the Y direction of the first reflective surface 21 is 31 mm, and the distance D between the ridge line 21b of the first reflective surface 21 and the translucent cover 12 of the light source 10 is the width dimension W1 of the translucent cover. About 1/3.

The first surface 22a of the second reflecting surface 22 forms an angle γ1 (γ1 is 110 ° in this embodiment) with the surface 21a of the first reflecting surface 21.

Even in such a configuration, light in a light irradiation angle range of 23 ° with respect to the optical axis of each LED element 11 is reflected by the first reflecting surface 21, and most of the reflected light is shown in FIG. As shown in FIG. 16, the light advances toward the outside so as to form an angle (an angle of approximately 50 ° or more) corresponding to the inclination angle of the first reflecting surface 21 with respect to the optical axis of each LED element 11. For this reason, the illuminating device of this embodiment also has the same effect as the illuminating device of 1st Embodiment.

A lighting device according to a sixth embodiment of the present invention will be described with reference to FIGS. The present embodiment is obtained by changing the specification of the second reflecting surface 22 of the reflecting plate 20 in the first embodiment, and the other configuration is the same as that of the first embodiment.

Each second reflecting surface 22 of the present embodiment is provided on both outer sides in the Y direction with respect to the first reflecting surface 21, and the first reflecting surface 21 is in a space between the pair of second reflecting surfaces 22. Is arranged. Each of the second reflecting surfaces 22 includes a first surface 22a that constitutes a portion closest to the first reflecting surface 21, and a second surface 22b that constitutes a portion that is next closest to the first reflecting surface 21. Have. Each of the first and

second surfaces

22a and 22b is a flat surface and extends in the X direction. The first surface 22a forms an angle γ1 (in this embodiment, γ1 is 115 °) with the surface 21a of the first reflecting surface 21, and the second surface 22b forms an angle γ2 with the first surface 22a (in this embodiment). γ2 is 160 °). In the present embodiment, the width dimensions L1 and L2 of the first and

second surfaces

22a and 22b are 38 mm, respectively.

In the illumination device configured as described above, light in a light irradiation angle range of 25 ° with respect to the optical axis of each LED element 11 is reflected by the first reflecting surface 21, and most of the reflected light is As shown in FIG. 18, it proceeds toward the outside so as to form an angle (approximately 70 ° or more) corresponding to the inclination angle of the first reflecting surface 21 with respect to the optical axis of each LED element 11. . Moreover, it has a pair of 2nd reflective surface 22 provided in the both outer sides of the direction which cross | intersects the optical axis of the LED element 11 with respect to the 1st reflective surface 21, and this pair of 2nd reflective surface 22 of The first reflection surface 21 is disposed in the space between the light, the light reflected by the first reflection surface 21 is further reflected by the second reflection surface, and the first reflection surface is irradiated among the light from the light source 10. Unapplied light is reflected by the second reflecting surface. For this reason, the illuminating device of this embodiment also has the same effect as the illuminating device of 1st Embodiment.

A lighting device according to a seventh embodiment of the present invention will be described with reference to FIGS. The present embodiment is obtained by changing the specification of the second reflecting surface 22 of the reflecting plate 20 in the first embodiment, and the other configuration is the same as that of the first embodiment.

Each second reflecting surface 22 of the present embodiment is provided on both outer sides in the Y direction with respect to the first reflecting surface 21, and the first reflecting surface 21 is in a space between the pair of second reflecting surfaces 22. Is arranged. Each second reflecting surface 22 has a first surface 22a that constitutes a portion closest to the first reflecting surface 21, and the first and second surfaces 22a are flat and extend in the X direction. Yes. The first surface 22a forms an angle γ1 with the surface 21a of the first reflecting surface 21 (γ1 is 115 ° in the present embodiment). In the present embodiment, the width dimension L1 of the first surface 22a is 70 mm.

In the illumination device configured as described above, light in a light irradiation angle range of 25 ° with respect to the optical axis of each LED element 11 is reflected by the first reflecting surface 21, and most of the reflected light is As shown in FIG. 20, it proceeds toward the outside so as to make an angle corresponding to the inclination angle of the first reflecting surface 21 with respect to the optical axis of each LED element 11 (an angle of about 70 ° or more). . Moreover, it has a pair of 2nd reflective surface 22 provided in the both outer sides of the direction which cross | intersects the optical axis of the LED element 11 with respect to the 1st reflective surface 21, and this pair of 2nd reflective surface 22 of The first reflection surface 21 is disposed in the space between the light, the light reflected by the first reflection surface 21 is further reflected by the second reflection surface, and the first reflection surface is irradiated among the light from the light source 10. Unapplied light is reflected by the second reflecting surface. For this reason, the illuminating device of this embodiment also has the same effect as the illuminating device of 1st Embodiment.

FIG. 21 shows the experimental results. The experimental results show that the lighting devices of the first to seventh embodiments are manufactured, and other lighting devices in which the angle β, the width dimension W2, and the distance D are changed in the first and second embodiments are manufactured. This is an evaluation of illuminance and illuminance unevenness on the floor as an irradiation position. Experimental examples 1 to 7 in FIG. 21 correspond to the first to seventh embodiments, respectively, and experimental example 8 has a width dimension W2 of 29 mm and an angle α of 20 ° in the first embodiment. Is a width dimension W2 of 21.5 mm and an angle α of 15 ° in the first embodiment, and Experimental Example 10 is a width dimension W2 of 14.5 mm and an angle α of 10 ° in the first embodiment. In Experiment 11, the width dimension W2 is 7.2 mm and the angle α is 5 ° in the first embodiment. In addition, Experimental Example 12 in FIG. 21 is obtained by making the distance D equal to the width dimension W2 in the second embodiment. Further, Comparative Example 1 in FIG. 21 is such that, in the first embodiment, the optical axis of each LED element 10 faces directly below, and most of the light from the light source 10 is directly irradiated onto the floor. In Example 2, as shown in FIG. 23, a flat reflecting surface is provided instead of the first reflecting surface 21.

In this experiment, as shown in FIG. 22, only one lighting device is attached to a ceiling of 2.5 m in height, and the first position P1, which is the floor directly under the lighting device, and the first position P1 in the Y direction. The illuminance is measured at a second position P2 that is 1 m away and a third position P3 that is 1 m away from the second position P2 in the Y direction, and the average illuminance of P1 to P3 is obtained, and between P1, P2, and P3 The maximum difference between them was obtained as the illuminance variation. In Experimental Examples 1 to 12 and Comparative Examples 1 and 2, other conditions such as the light source 10 are the same.

From the comparison between Experimental Examples 1 to 12 and Comparative Example 2 in FIG. 21, when the light source 10 is installed so that each LED 11 faces upward, the first reflecting surface 21 is provided on the reflecting plate 20, thereby It was confirmed that the illuminance increased. Moreover, if the angle α is 10 ° or more, as compared with the case where each LED element 11 of the light source 10 is installed downward as in Comparative Example 1 and the light of each LED element 11 is directly irradiated on the floor. The average illuminance was high and the illuminance variation was small.

On the other hand, compared with Experimental Examples 2 and 3 in which the angle β is 60 ° and 120 °, the Experimental Examples 1, 8, 9, 10, and 11 in which the angle α is 102 ° have less illuminance variation. Accordingly, the angle β is more preferably in the range of 70 ° or more and 115 ° or less in order to reduce the unevenness of the light at the irradiation position, and the range of 90 ° or more and 110 ° or less is the unevenness of the light in the irradiation position. It is considered to be more preferable in terms of reduction.

Compared with Experimental Example 4, the variation in illuminance was smaller in Experimental Examples 1, 6, and 7 in which each second reflecting surface 22 was composed of a plurality of planes or a single plane. This is because light is emitted radially from each LED element 11 and is reflected by the first reflecting surface 21 which is a flat surface. Therefore, when the second reflecting surface 22 is a concave curved surface, each LED element 11. One reason is that the light from the first reflecting surface 21 tends to be collected by the second reflecting surface 22. In Experimental Example 4, since the average illuminance is higher than that of Comparative Example 1 and the illuminance variation is small, the same effect as in the first embodiment is recognized.

In the results of Experimental Examples 1 to 12, the angle γ1 formed between each surface 21a of the first reflecting surface 21 and the vicinity of the first reflecting surface 21 in each second reflecting surface 22 is 110 ° to 130 °. In this range, the above-described effects are confirmed. This angle γ1 can be appropriately changed according to the light source 10, the first reflecting surface 21, and the irradiation range. From the results of Experimental Examples 1 to 12, when the present lighting device is provided on the ceiling for room lighting, the angle γ1 γ1 is preferably 100 ° or more and 140 ° or less, and more preferably 110 ° or more and 130 ° or less.

Further, from the results of Experimental Example 12 and the results of Experimental Examples 1 to 11, as long as the distance D is equal to or smaller than the width dimension W2, the same effects as those of the first embodiment are effectively exhibited. It was confirmed. Depending on the light source 10, the reflection plate 20, and the irradiation range, even if the distance D is 1 or more times the width dimension W2, the same effects as those of the first embodiment can be obtained. Further, in order to reduce the size of the lighting device, it is preferable that the distance D is small.

Further, from the results of Experimental Examples 1 to 3, 5, 6, and 8 to 12, the second reflecting surfaces 22 are arranged side by side in the Y direction and are continuous with each other at a predetermined angle γ2 to γ4. It has been confirmed that the construction of a plurality of planes is advantageous in reducing the unevenness of light at the irradiation position. In Experimental Examples 1 to 3, 5, 6, 8 to 12, the angles γ2 to γ4 are 160 ° to 170 °, and the above-described effects are confirmed in this range. The angle γ1 can be appropriately changed according to the light source 10, the first reflecting surface 21, and the irradiation range. From the results of Experimental Examples 1 to 3, 5, 6, and 8 to 12, the angle γ1 is 155 ° or more. It is preferable that it is preferably 160 ° or more and 175 ° or less.

In each of the above-described embodiments, the ridge line 21b is shown in a linear shape. When the distance to the other surface 21a is sufficiently smaller than the width dimension W2, the same effects as those of the first embodiment are obtained. Specifically, the width dimension W3 is preferably 1/5 or less of the width dimension W2, more preferably 1/10 or less, and even more preferably 1/20 or less. That is, the smaller the width dimension W3, the better. In FIG. 24, the ridge line 21b is a flat surface, but it may be a convex curved surface or a concave curved surface.

In each of the above embodiments, the ridgeline 21b and the optical axis of each LED element 11 coincide with each other. On the other hand, as shown in FIG. 25, the ridgeline 21b and the optical axis of each LED element 11 can be shifted in the Y direction. Even in this case, since the light of the predetermined irradiation angle range α is reflected by the first reflecting surface 21 with respect to the optical axis of each LED element 11, if the angle α is in accordance with the experimental result of FIG. The same effects as described above are achieved. Further, as shown in FIG. 25, by actively shifting the ridge line 21b and the optical axis of each LED element 11 in the Y direction, the second reflecting surface 22 on the side where the optical axis of each LED element 11 is arranged is arranged. It is also possible to increase the amount of reflected light.

In each of the above embodiments, the light source 10 in which a plurality of LED elements 11 are arranged in a line in the X direction is shown. On the other hand, as shown in FIG. 26, it is also possible to arrange a plurality of LED elements 11 in a plurality of rows in the X direction. Even in this case, as shown in FIG. 26, the first reflecting surface 21 receives light in a predetermined irradiation angle range α with respect to the optical axis of the LED elements 11 in each row, and the angle α is If it is along the experimental result of FIG. 21, the effect similar to the above can be show | played. Alternatively, the first reflecting surface 21 receives light in a predetermined irradiation angle range α with respect to the optical axis of the LED elements 11 in at least one row of each row, and the angle α is as shown in FIG. As long as it is in accordance with the experimental results, the same effects as described above can be obtained.

In addition, as shown in FIG. 27, the light source 10 may be configured such that the optical axes of the LED elements 11 in each row are directed in different directions. Even in this case, as long as the light in the predetermined light irradiation angle range ζ2 is received by the pair of surfaces of the first reflecting surface with respect to the center of the light irradiation angle range ζ1 of the light source 10, the same as described above. Has the effect of. In addition, the range of the angle ζ2 is set to the same setting as the angle α in each of the above-described embodiments, so that the same effect as that in each of the above-described embodiments is achieved. The reference of the angles ζ1 and ζ2 can be, for example, the center position CP of each row as shown in FIG.

In each of the above embodiments, the LED elements 11 in the light source 10 are arranged in a straight line. However, as shown in FIG. 28, the LED elements 11 are arranged in the circumferential direction in the light source 10. Even in such a case, the same configuration as described above can be adopted. In this case, the X direction is a circumferential direction, and the Y direction is a radial direction of the circumference. For example, the light source 10 has a ring shape, and the reflection plate 20 also has a ring shape along the light source 10. In this case, the same effects as those of the above embodiments can be obtained.

In each of the above-described embodiments, each surface 21a of the first reflecting surface 21 is completely flat. However, as shown in FIG. 29, the radius of curvature is at least twice the width dimension W2, or the depth dimension. When each surface 21a is constituted by a curved surface having a DP or a protruding dimension of 1 mm or less, each surface 21a is assumed to be a flat surface. The reason for this is that even when a curved surface having a slight curvature is used as described above, the angle β and the like are set in the same manner as in each of the above embodiments, so that the same effect as that in each of the above embodiments can be achieved. Because.

Further, each of the surfaces 22a to 22d of the second reflecting surface 22 is also formed by a curved surface having a radius of curvature of at least twice the width dimension W2 or a depth dimension DP or a projecting dimension of 1 mm or less. It is assumed that 22a to 22d are flat surfaces.

The illumination device according to the eighth embodiment of the present embodiment will be described with reference to FIGS. In this embodiment, as shown in FIGS. 31 and 33, the extending direction of the fluorescent tube 31 is the X direction, is orthogonal to the extending direction of the fluorescent tube 31, and the optical axis plane LS of the fluorescent lamp 30 described below. A direction orthogonal to the Y direction is taken as a Y direction.

This illumination device includes a fluorescent lamp 30 and a reflector 20 as shown in FIGS. As shown in FIG. 31, the fluorescent lamp 30 is configured to irradiate light in a predetermined light irradiation angle range ζ 1 in a direction (Y direction) orthogonal to the extending direction of the fluorescent tube 31. In the present embodiment, the central surface (surface extending in the X direction) of the light irradiation angle range ζ1 is referred to as an optical axis surface LS of the fluorescent lamp 30. As will be described later, the fluorescent lamp 30 is mounted so that the optical axis surface LS faces directly upward when mounted on an indoor ceiling.

As the fluorescent lamp 30, it is possible to use, for example, cold cathode tube lamps disclosed in Japanese Patent Application Laid-Open Nos. 2010-251261, 2010-244835, 2010-211961, and the like. In the present embodiment, a plurality of (two in this embodiment) fluorescent tubes 31 composed of cold cathode tubes (CCFL tubes) extending in a predetermined direction (X direction) and extending along each fluorescent tube 31. A plurality of (in this embodiment, two) in-lamp reflectors 40 and a translucent cover made of a known translucent material such as synthetic plastic or glass and extending in the extending direction of the fluorescent tube 31 32, a case 33 extending along the in-lamp reflector 40, a base 34 provided at each of both ends of the fluorescent lamp 30 in the longitudinal direction, and a terminal 34a provided for each of the bases 34. Have Each in-lamp reflector 40 is attached to the case 33 by a fixture (not shown), and each fluorescent tube 31 is also attached to the case 33 by a fixture (not shown). Each fluorescent tube 31 is disposed between the in-lamp reflector 40 and the translucent cover 32. In this embodiment, the width dimension W1 of the translucent cover 32 is 28 mm, but it is also possible to use a translucent cover 32 having a width dimension W1 other than that. Further, the fluorescent lamp 30 is of a type in which the light diffusion of each fluorescent tube 31 by the translucent cover 32 is small, but a type in which the light diffusion of each fluorescent tube 31 by the translucent cover 33 is large can also be used. It is. In the present embodiment, a cold cathode tube is used as the fluorescent tube 31, but other fluorescent tubes such as a T4 fluorescent tube and a T5 fluorescent tube can be used. In the present embodiment, the two fluorescent tubes 31 are separately formed. However, the two fluorescent tubes 31 are continuous at one end in the length direction with, for example, a U-shaped fluorescent tube. It is also possible to form it. Even in this case, in this embodiment, it is assumed that the two fluorescent tubes 31 extend in the X direction.

Each fluorescent tube 31 has a diameter d1 of several millimeters (5 mm in the present embodiment), and is arranged so as to be substantially parallel to each other. The case 33 is a cylindrical member made of a metal material such as aluminum and extending in the extending direction of each fluorescent tube 31, and includes an inverter or a PFC (Power Factor Controller, not shown) for supplying power to each fluorescent tube 31 inside. Z).

Each in-lamp reflecting plate 40 is formed by bending a metal plate such as aluminum and has a first reflecting surface 41 and a second reflecting surface 42. In the present embodiment, each of the reflecting

surfaces

41 and 42 is formed to have a rough surface or have irregularities so that the center line average roughness is 0.5 μm or more. For example, the surface of the aluminum plate constituting each of the reflection surfaces 41 and 42 is subjected to rough surface treatment and anodizing treatment by shot blasting or the like so that the center line average roughness is 0.5 μm or more. In another example, a plurality of small recesses are formed on the surface of the aluminum plate constituting each of the reflecting

surfaces

41 and 42 by embossing or the like, and in order to improve the reflectance on the aluminum surface, glass or plastic The translucent material is coated with PVD or the like.

The first reflecting surface 41 is composed of a pair of surfaces 41a extending in the X direction. Each surface 41a is a flat surface, and a convex ridge 41b toward the fluorescent lamp 30 is formed at a portion where the pair of surfaces 41a intersect. Each fluorescent tube 31 irradiates light within a light irradiation angle range of 360 ° in a direction orthogonal to the extending direction, and each of the in-lamp reflectors 40 is out of the light irradiated from the corresponding fluorescent tube 31. It receives light in a predetermined light irradiation angle range δ1.

Further, the first reflecting surface 41 has an angle δ2 (in this embodiment, δ2 is 17 °) with respect to the central surface CS of the predetermined light irradiation angle range δ1 that is irradiated from the fluorescent tube 31 to each in-lamp reflecting plate 40. ) To receive light in the range of Further, the surfaces 41a of the first reflecting surface 41 form an angle ε (ε is 100 ° in the present embodiment) in the vicinity of the ridge line 41b. In this embodiment, the width dimension W3 in the Y direction of the first reflecting surface 41 is 3.5 mm, and the distance D1 between the ridge line 41b of the first reflecting surface 41 and the fluorescent tube 31 is the diameter of the fluorescent tube 31. It is about 1/2 of d1.

Each second reflecting surface 42 is provided on both outer sides in the Y direction with respect to the first reflecting surface 41, and the first reflecting surface 41 is arranged in a space between the pair of second reflecting surfaces 42. Yes. Each of the second reflecting surfaces 42 includes a first surface 42a constituting a portion closest to the first reflecting surface 41, and a second surface 42b constituting a portion next to the first reflecting surface 41, Next, it has the 3rd surface 42c which comprises the part close | similar to the 1st reflective surface 41, and the 4th surface 42d which comprises the part farthest from the 1st reflective surface 41. FIG. Each of the first to fourth surfaces 42a to 42d is a flat surface and extends in the X direction. The first surface 42a forms an angle γ5 (γ5 is 120 ° in this embodiment) with the surface 41a of the first reflecting surface 41, and the second surface 42b forms an angle γ6 (in this embodiment) with the first surface 42a. γ6 is 170 °), the third surface 42c is at an angle γ7 with the second surface 42b (in this embodiment, γ7 is 170 °), and the fourth surface 42d is at an angle γ8 (with γ8 ( In this embodiment, γ8 is 170 °. In the present embodiment, the width dimensions L5 to L8 of the first to fourth surfaces 42a to 42d are 2 mm, respectively.

As in the first embodiment, the fluorescent lamp 30 is attached to the indoor ceiling by inserting the terminal 34a of each base 34 into the socket 100 provided on the indoor ceiling. As the socket 100, an existing socket for attaching a fluorescent lamp can be used as it is.

As described above, in the fluorescent lamp 30, light within 17 ° with respect to the central plane CS among the light irradiated from the fluorescent tube 31 to the in-lamp reflector 40 is a pair of surfaces 41 a of the first reflecting surface 41. A convex ridge 41b toward the fluorescent tube 31 is formed at a portion where the pair of surfaces 41a intersect (see FIG. 36), and the pair of surfaces 41a of the first reflecting surface 41 is the same as the ridge 41b. Make an angle of 100 ° with each other in the vicinity. For this reason, the light from each fluorescent tube 31 is reflected by the first reflecting surface 41, and most of the reflected light is reflected on the first reflecting surface 41 with respect to the center surface CS as shown in FIG. It proceeds toward the outside so as to form an angle according to the inclination angle (an angle of approximately 70 ° or more). Moreover, it has a pair of 2nd reflective surfaces 42 provided in the both sides of the Y direction with respect to the 1st reflective surface 41, and a 1st reflective surface is in the space between the pair of 2nd reflective surfaces 42. 41 is arranged, the light reflected by the first reflecting surface 41 is further reflected by the second reflecting surface 42, and the light directly irradiated on the second reflecting surface 42 from the fluorescent tube 31 is also the second reflecting surface. 42 is reflected. With such a configuration, the light from each fluorescent tube 30 is mainly irradiated upward, and the optical axis surface LS of the fluorescent lamp 30 faces directly upward as described above. Further, with such a configuration, light from the fluorescent tube 31 is efficiently irradiated upward.

On the other hand, the reflector 20 is the same as that of the first embodiment, and is attached to the indoor ceiling as in the first embodiment. Specifically, when the fluorescent lamp 30 is attached to the socket 100, the reflector 20 is attached to the ceiling of the room so as to be positioned above the fluorescent lamp 30.

As shown in FIGS. 31 and 32, the pair of surfaces 21a of the first reflecting surface 21 of the reflecting plate 20 has a predetermined light irradiation angle range ζ2 (ζ2 in this embodiment) with respect to the optical axis surface LS of the fluorescent lamp 30. Are arranged so as to receive light of 28 °, and form an angle β (in the present embodiment, β is 102 °) in the vicinity of the ridge line 21b. In the present embodiment, the distance D between the ridge line 21b of the first reflecting surface 21 and the translucent cover 32 of the fluorescent lamp 30 is about 1/3 of the width dimension W2 of the translucent cover 32.

As described above, in this illuminating device, light in a light irradiation angle range of 28 ° with respect to the optical axis surface LS of the fluorescent lamp 30 is applied to the pair of surfaces 21a of the first reflecting surface 21, and the pair of surfaces. A convex ridge line 21b toward the fluorescent lamp 30 is formed at a portion where 21a intersects, and the pair of surfaces 21a of the first reflecting surface 21 form an angle of 102 ° with each other in the vicinity of the ridge line 21b. For this reason, light in the light irradiation angle range of 28 ° with respect to the optical axis surface LS of the fluorescent lamp 30 is reflected by the first reflecting surface 21, and most of the reflected light is as shown in FIG. The light advances toward the outside so as to form an angle corresponding to the inclination angle of the first reflecting surface 21 with respect to the optical axis surface LS of the fluorescent lamp 30 (an angle of about 70 ° or more). Moreover, it has a pair of 2nd reflective surface 22 provided in the both outer sides of the direction which cross | intersects the optical axis surface LS of the fluorescent lamp 30 with respect to the 1st reflective surface 21, The said 2nd reflective surface of the said pair The first reflecting surface 21 is disposed in the space between the two. For this reason, the light reflected by the first reflecting surface 21 is reflected by the second reflecting surface 22, while the light directly irradiated from the fluorescent lamp 30 is also reflected by the second reflecting surface 22.

Thus, according to the present embodiment, the fluorescent lamp 30 is disposed so that the optical axis surface LS faces directly upward, the first reflecting surface 21 is disposed above the fluorescent lamp 30, and the first reflecting surface 21 is disposed. The ridge line 21b is convex downward. Further, the first reflecting surface 21 is disposed in the space between the pair of second reflecting surfaces 22. For this reason, the light reflected by the first reflecting surface 21 is further reflected by the second reflecting surface 22, while the light directly irradiated from the fluorescent lamp 30 is also reflected by the second reflecting surface 22, and the second The light reflected by the reflecting surface 22 is irradiated toward an irradiation position such as an indoor floor. Therefore, according to this embodiment, the light from the fluorescent lamp 30 can be efficiently irradiated to the irradiation position such as the floor.

Further, in this embodiment, each of the reflecting

surfaces

21 and 22 is formed to have a rough surface or an unevenness by embossing or the like so that the center line average roughness is 0.5 μm or more. For this reason, the fluorescent lamp 30 is composed of two fluorescent tubes 31, and light is emitted from the two line light sources, but the light from each fluorescent tube 31 is diffused by the reflecting

surfaces

21 and 22. . In particular, since the light around the optical axis surface LS of the fluorescent lamp 30 is reflected by both the first reflecting surface 21 and the second reflecting surface 22 and is irradiated to the irradiation position, the unevenness of the light at the irradiation position is reduced. Is very advantageous.

Even when the reflecting

surfaces

21 and 22 are mirror-finished, for example, and the center line average roughness is about 0.1 μm, when the light from the fluorescent lamp 30 is reflected by the reflecting

surfaces

21 and 22, Not a little light from the lamp 30 is diffused by the reflecting

surfaces

21 and 22. For this reason, compared with the case where the light of the fluorescent lamp 30 is directly irradiated to the irradiation position such as the floor, the light from the fluorescent lamp 30 is diffused, and uneven illuminance at the irradiation position can be reduced.

FIG. 38 shows the experimental results, and shows the results of the same evaluation performed by the same method as in FIG. As a result of this experiment, the lighting device of the eighth to fourteenth embodiments was manufactured, and another lighting device having the width dimension W2 and the distance D changed in the eighth embodiment was manufactured. This is an evaluation of illuminance and unevenness of illuminance. The illumination device of the ninth embodiment is obtained by changing the reflection plate 20 to the reflection plate 20 of the second embodiment (see FIGS. 9 and 10) in the eighth embodiment, and the illumination device of the tenth embodiment In the eighth embodiment, the reflection plate 20 is changed to the reflection plate 20 of the third embodiment (see FIGS. 11 and 12), and the illuminating device of the eleventh embodiment replaces the reflection plate 20 in the eighth embodiment. The illuminating device of the twelfth embodiment is changed to the reflector 20 of the fourth embodiment (see FIGS. 13 and 14), and the illuminating device of the twelfth embodiment replaces the reflector 20 in the fifth embodiment (FIGS. 15 and 15). 16), the illuminating device of the thirteenth embodiment is changed from the reflecting plate 20 to the reflecting plate 20 of the sixth embodiment (see FIGS. 17 and 18) in the eighth embodiment. 14th implementation Lighting device state is obtained by changing the reflecting plate 20 to the reflection plate 20 of the seventh embodiment (see FIGS. 19 and 20) in the eighth embodiment. In the ninth to fourteenth embodiments, as in the eighth embodiment, the optical axis surface LS of the fluorescent lamp 30 faces directly above, and the position of the optical axis surface LS is the first reflecting surface of the reflecting plate 20. The distance D between the ridge line 21b of the first reflecting surface 21 of the reflector 20 and the fluorescent tube 31 is about 1/3 of the width W2.

Experimental examples 13 to 19 in FIG. 38 correspond to the eighth to fourteenth embodiments, respectively, and experimental example 20 is an experiment in which the width dimension W2 is 25 mm and the angle ζ2 is 20 ° in the eighth embodiment. Example 21 is an example in which the width dimension W2 is 18 mm and the angle ζ2 is 15 ° in the eighth embodiment, and Experimental Example 22 is an example in which the width dimension W2 is 12 mm and the angle ζ2 is 10 ° in the eighth embodiment. In Experimental Example 23, the width W2 is 6 mm and the angle ζ2 is 5 ° in the eighth embodiment. Further, Experimental Example 24 in FIG. 38 is the distance D made equal to the width dimension W2 in the ninth embodiment.

Further, Comparative Example 3 in FIG. 38 is such that in the eighth embodiment, the optical axis surface LS of the fluorescent lamp 30 faces directly below, and most of the light from the fluorescent lamp 30 is directly irradiated onto the floor. In Comparative Example 4, as shown in FIG. 39, a flat reflecting surface is provided in place of the first reflecting surface 21.

In Experimental Examples 13 to 24, other conditions such as the fluorescent lamp 30 are the same as each other.

From comparison between Experimental Examples 13 to 24 and Comparative Example 4 in FIG. 38, when the fluorescent lamp 30 is installed so that the optical axis surface LS faces upward, by providing the first reflecting surface 21 on the reflecting plate 20, It was confirmed that the illuminance on the floor surface increased. Further, if the angle ζ2 is 5 ° or more, more preferably 10 ° or more, the fluorescent lamp 30 is installed so that the optical axis plane LS faces directly upward from comparison between Experimental Examples 13 to 24 and Comparative Example 3. Thus, providing the first reflecting surface 21 on the reflecting plate 20 is higher in average illuminance than the case where the fluorescent lamp 30 is mounted so that the optical axis surface LS faces downward as in Comparative Example 3, and The illuminance variation was small.

Also, compared to Experimental Example 16, the variation in illuminance was smaller in Experimental Examples 13, 18, and 19 in which each second reflecting surface 22 was composed of a plurality of planes or a single plane. This is considered to be one of the reasons that the light from the fluorescent lamp 30 tends to be collected by the second reflecting surface 22 when the second reflecting surface 22 is a concave curved surface. In addition, since the average illuminance is higher and the illuminance variation is smaller than that of Comparative Example 4 in Experimental Example 16, the same effects as in the eighth embodiment are recognized.

In Experimental Examples 13 to 24, an angle γ1 formed between each surface 21a of the first reflecting surface 21 and the vicinity of the first reflecting surface 21 in each second reflecting surface 22 is 110 ° to 130 °. In this range, the above-described effects are confirmed. The angle γ1 can be appropriately changed according to the fluorescent lamp 30, the first reflecting surface 21, and the irradiation range. However, when the lighting device is provided for indoor lighting, the angle γ1 is 100 ° or more and 140 ° or less. It is preferable that the angle is 110 ° or more and 130 ° or less.

Further, from the results of Experimental Example 24 and the results of Experimental Examples 13 to 23, if the distance D is equal to or smaller than the width dimension W2, the same effects as those of the eighth embodiment are effectively exhibited. It was confirmed. Depending on the tendency lamp 30, the reflector 20, and the irradiation range, the same effects as those in the eighth embodiment can be obtained even if the distance D is 1 or more times the width dimension W2. Further, in order to reduce the size of the lighting device, it is preferable that the distance D is small.

Further, from the results of Experimental Examples 13 to 15, 17, 18, and 20 to 24, the second reflecting surfaces 22 are arranged side by side in the Y direction and are continuous with each other at a predetermined angle γ2 to γ4. It has been confirmed that the construction of a plurality of planes is advantageous in reducing the unevenness of light at the irradiation position. In Experimental Examples 13 to 15, 17, 18, 20 to 24, the angles γ2 to γ4 are 160 ° to 170 °, and the above-described effects are confirmed in this range. The angle γ1 can be appropriately changed according to the tendency lamp 30, the first reflecting surface 21, and the irradiation range. From the results of Experimental Examples 13 to 15, 17, 18, and 20 to 24, the angle γ1 is 155 ° or more. It is preferable that it is 160 ° or more and 175 ° or less.

In the eighth to fourteenth embodiments, the ridgeline 21b is shown in a linear shape, but the ridgeline 21b shown in FIG. 24 is used even in the case where the reflecting plate 21 in which the ridgeline 21b appears in a planar shape having a width dimension W3 is used. When the width dimension W3 (distance between the one surface 21a and the other surface 21a) is sufficiently smaller than the width dimension W2, the same effects as those of the eighth embodiment are achieved. Specifically, the width dimension W3 is preferably 1/5 or less of the width dimension W2, more preferably 1/10 or less, and even more preferably 1/20 or less. That is, the smaller the width dimension W3, the better. In FIG. 24, the ridge line 21b is a flat surface, but it may be a convex curved surface or a concave curved surface.

In the eighth to fourteenth embodiments, the ridgeline 21b and the optical axis plane LS of the tendency lamp 30 are shown to coincide with each other. On the other hand, as shown in FIG. 40, the ridgeline 21b and the optical axis surface LS of the fluorescent lamp 30 can be shifted in the Y direction. Even in this case, since the light in the predetermined irradiation angle range ζ2 is reflected by the first reflecting surface 21 with respect to the optical axis surface LS of the fluorescent lamp 30, if the angle ζ2 is in accordance with the experimental result of FIG. The same effects as described above are obtained. Also, as shown in FIG. 38, the second reflecting surface on the side where the optical axis surface LS of the fluorescent lamp 30 is arranged by positively shifting the ridge line 21b and the optical axis surface LS of the fluorescent lamp 30 in the Y direction. It is also possible to increase the amount of reflection of 22 light.

In the eighth to fourteenth embodiments, the one using the fluorescent lamp 30 in which the plurality of fluorescent tubes 31 are arranged in the Y direction is shown. Play.

Further, as shown in FIG. 41, in the fluorescent lamp 30, even if each in-lamp reflecting plate 40 is arranged so as to face a little outside, a predetermined comparative irradiation angle range with respect to the optical axis surface LS of the fluorescent lamp 30 is obtained. If the light of ζ2 is received by the pair of surfaces 21a of the first reflecting surface 21, the same effects as described above can be obtained.

In the eighth to fourteenth embodiments, the fluorescent lamps 31 of the fluorescent lamp 30 are shown as being straight, but as shown in FIG. 42, the fluorescent lamp 30 is ring-shaped and each fluorescent lamp 31 is Even in the case of a ring shape, the same configuration as in the eighth to fourteenth embodiments can be adopted. In this case, the X direction is a circumferential direction, the Y method is a radial direction, and the reflector 20 has a ring shape. Even in this case, the same effects as those of the eighth to fourteenth embodiments can be obtained.

In the eighth to fourteenth embodiments, the surfaces 21a of the first reflecting surface 21 are completely flat. However, like the reflecting plate 20 in FIG. 29, the radius of curvature is 2 with a width dimension W2. When each surface 21a is constituted by a curved surface having a depth of DP or more, or a depth dimension DP or a protrusion dimension of 1 mm or less, each surface 21a is assumed to be a flat surface. The reason for this is that even when a curved surface having a slight curvature is used as described above, the angle β and the like are set in the same manner as in each of the above embodiments, so that the same effect as that in each of the above embodiments can be achieved. Because.

In the eighth to fourteenth embodiments, each reflecting plate 40 of the fluorescent lamp 30 has the first reflecting surface 41 and the second reflecting surface 42. On the other hand, as shown in FIG. 43, in the eighth embodiment, each reflector 40 of the fluorescent lamp 30 can be replaced with a reflector 50 (fifteenth embodiment). The reflection plate 50 has a shape obtained by cutting a part of the cylinder in the circumferential direction. Alternatively, as shown in FIG. 44, in the eighth embodiment, the two reflectors 40 of the fluorescent lamp 30 can be replaced with one reflector 60 (the sixteenth embodiment). Alternatively, as shown in FIG. 45, in the eighth embodiment, the fluorescent lamp 30 can be replaced by one fluorescent tube 70 (a seventeenth embodiment).

In the case of the seventeenth embodiment, it is possible to use a cold cathode tube as the fluorescent tube 70, and it is also possible to use a T4 fluorescent tube, a T5 fluorescent tube or another fluorescent tube which is not a cold cathode tube. In the present embodiment, a normal fluorescent tube is used, and the fluorescent tube 70 has a width (diameter) W1 of 28 mm. The fluorescent tube 70 irradiates light in a light irradiation angle range of 360 ° in a direction orthogonal to the extending direction. In addition, light in a predetermined light irradiation angle range ζ2 (in the present embodiment, ζ2 is 28 °) among the light emitted from the fluorescent tube 70 is received by the first reflecting surface 21 of the reflecting plate 20. Yes.

FIG. 46 shows the experimental results, and shows the results of evaluation by the same method as in FIGS. 21 and 38. As a result of this experiment, the illumination devices of the fifteenth to seventeenth embodiments were manufactured, and the illuminance and the unevenness of the illuminance on the floor as the irradiation position were evaluated. Experimental examples 25 to 27 in FIG. 46 correspond to the fifteenth to seventeenth embodiments, respectively. In Comparative Examples 5, 6 and 7 in FIG. 46, in the fifteenth, sixteenth and seventeenth embodiments, a reflective surface which is a plane is provided in place of the first reflective surface 21 as in the case of FIG. It is.

From comparison between Experimental Examples 25 to 27 and Comparative Examples 5 to 7 in FIG. 46, providing the first reflecting surface 21 on the reflecting plate 20 increases the illuminance on the floor and reduces the illuminance variation. Was confirmed.

In addition, from the comparison between Experimental Examples 25 and 26 in FIG. 46 and Experimental Example 13 in FIG. 38, the illuminance on the floor surface is increased by providing the first reflecting surface 41 on the lamp reflecting plate 40 of the fluorescent lamp 30. Was confirmed. This result shows that the light from the fluorescent tube 31 of the fluorescent lamp 30 can be effectively used when the first reflecting surface 41 is provided on the lamp reflecting plate 40.

In the seventeenth embodiment, the diameter d2 of the fluorescent tube 70, the distance between the fluorescent tube 70 and the ridge line 21b, the width W2 and the angle β of the first reflecting surface 21, etc. are the specifications and irradiation position of the fluorescent tube 70. However, as long as the angle ζ2, the angle β, the distance D, and the angles γ1 to 4 are in accordance with the experimental results of FIG. 38, the same as in the eighth to fourteenth embodiments. In addition, the light from the fluorescent tube 70 can be effectively irradiated to the irradiation position.

When the fluorescent lamp 30 of the eighth embodiment is used, as in Comparative Example 3 in FIG. 38, the optical axis LS of the fluorescent lamp 30 faces directly below, and most of the light from the fluorescent lamp 30 is directly irradiated onto the floor. Even in this case, the light from each fluorescent tube 31 can be used effectively by the lamp reflector 40 as described above. For this reason, the fluorescent lamp 30 of the eighth embodiment can be used alone as a lighting device.

In the fluorescent lamp 30, the diameter d 1 of the fluorescent tube 31, the distance D 1 between the fluorescent tube 31 and the ridge line 41 b, the width W 3 of the first reflecting surface 41, the angle ε, and the like are the specifications of the fluorescent tube 31 and the fluorescent tube 31. Can be appropriately changed according to the state of the irradiation position where the light is irradiated. Here, the angle δ2, the angle ε, the distance D1, and the angles γ5 to 7 of the reflecting plate 40 in the fluorescent lamp 30 are the angle ζ2, the angle β, the distance D, and the angle γ1 of the reflecting plate 20 in the illumination device of the eighth embodiment. Corresponds to .about.4. Therefore, the angle δ2, the angle ε, the distance D1, and the angles γ5 to 7 on the reflector 40 of the fluorescent lamp 30 are considered to be replaced with the angle ζ2, the angle β, the distance D, and the angles γ1 to 4, and these are the experimental results of FIG. By following the above, it can be said that the light from the fluorescent tube 31 can be used more effectively, as in the eighth to fourteenth embodiments.

In each of the above embodiments, the lighting device provided on the ceiling of the room is shown. However, it is also possible to use the lighting device having the structure of each of the above embodiments for a backlight of a signboard or a liquid crystal screen, and cultivate plants. It can also be used as a lighting device for other purposes, and can also be used as a lighting device for other purposes.

For example, as shown in FIG. 30, in the signboard device in which the acrylic plate 200 is arranged in front of the illumination device having the configuration of the first embodiment, the acrylic plate 200 is illuminated by the light of each LED element 11. As shown in the experimental results of 21 and the like, unevenness in the illuminance of light irradiated on the acrylic plate is reduced, and the amount of light irradiated on the back surface of the acrylic plate 200 can be effectively improved. Thereby, the uneven brightness of the acrylic plate when the acrylic plate is viewed from the A direction can be reduced, and the acrylic plate can be made bright.

As another example, as shown in FIG. 47, a plurality of fluorescent tubes 31 extending in a predetermined direction, a plurality of reflecting plates 40 respectively provided on the back side of the plurality of fluorescent tubes 31, and a plurality of fluorescent tubes It is possible to configure a liquid crystal backlight including a diffusion plate 300 provided in front of the tube 31 (eighteenth embodiment). In this case, it is possible to effectively improve the luminance of the liquid crystal and reduce the power used for the backlight for the liquid crystal.

The above embodiments are illustrative of some of the many possible embodiments that illustrate the application of the principles of the present invention. Many other various modifications can be easily made by those skilled in the art without departing from the scope of the present invention.

DESCRIPTION OF SYMBOLS 10 Light source 11 LED element 12 Translucent cover 13 Substrate 14 Heat sink 15 Base 15a Terminal 20 Reflector 21 First reflective surface 21a Surface 21b Ridge line 22 Second reflective surface

22a First surface

22b Second surface 22c Third surface Surface 22d Fourth surface 23 Flange portion 30 Fluorescent lamp 31 Fluorescent tube 32 Translucent cover 33 Case 34 Base 34a Terminal 34a
40 Reflecting plate 41 First reflecting surface 41a Surface 41b Ridge line 22 Second reflecting surface

42a First surface

42b Second surface

42c Third surface

42d Fourth surface 100 Socket

Claims

A lighting device,
A plurality of LED elements (11) arranged in parallel in a predetermined direction;
Consisting of a pair of surfaces (21a) extending in the direction in which the LED elements (11) are arranged side by side, a convex ridge line toward the LED element (11) side at the intersection of the pair of surfaces (21a) (21b) is a first reflecting surface (21), and the first reflecting surface (21) is the LED elements (11) out of the light emitted from the LED elements (11). Are arranged so as to receive light within a light irradiation angle range of 10 ° or less with respect to the optical axis, and the pair of surfaces (21a) is 60 ° or more and 120 ° or less with respect to each other in the vicinity of the ridge line (21b). The first reflecting surface (21), which forms an angle;
A pair of first electrodes provided on both outer sides of the first reflecting surface (21) in a direction that intersects the optical axis of each LED element (11) and intersects the parallel arrangement direction of the LED elements (11). Two reflective surfaces (22) and
The first reflection surface (21) is disposed in a space between the pair of second reflection surfaces (22), and the pair of second reflection surfaces (22) is the first reflection surface ( 21) Reflecting the light reflected by 21) and the light directly emitted from each LED element (11).
A lighting device,
A plurality of LED elements (11) arranged in parallel in a predetermined direction; and a light-transmitting cover (12) made of a light-transmitting material and covering the plurality of LED elements (11), of the LED elements (11) A light source (10) for irradiating light within a predetermined light irradiation angle range in a direction orthogonal to the juxtaposed direction;
It consists of a pair of surface (21a) extended in the juxtaposition direction of the said LED element (11) of the said light source (10), and toward the said light source (10) side in the part which the said pair of surface (21a) crosses. It is the 1st reflective surface (21) in which the convex ridgeline (21b) was formed, Comprising: This 1st reflective surface (21) is the said light irradiation angle range among the lights irradiated from the said light source (10). The pair of surfaces (21a) form an angle of 60 ° to 120 ° with each other in the vicinity of the ridge line (21b). The first reflective surface (21),
The light source (10) crosses the optical axis of each LED element (11), and on both outer sides of the first reflecting surface (21) in a direction crossing the parallel arrangement direction of the LED elements (11). A pair of second reflecting surfaces (22) provided,
The first reflection surface (21) is disposed in a space between the pair of second reflection surfaces (22), and the pair of second reflection surfaces (22) is the first reflection surface ( 21) Reflecting the light reflected by 21) and the light directly emitted from the light source (10).
A lighting device,
A plurality of LED elements (11) arranged in parallel in a predetermined direction and a light-transmitting cover (12) made of a light-transmitting material and covering the plurality of LED elements, and the direction in which the LED elements (11) are arranged in parallel A light source (10) for irradiating light in a predetermined light irradiation angle range in a direction perpendicular to
It consists of a pair of surface (21a) extended in the juxtaposition direction of the said LED element (11) of the said light source (10), and toward the said light source (10) side in the part which the said pair of surface (21a) crosses. A first reflective surface (21) formed with a convex ridge line (21b), the first reflective surface (21) being orthogonal to the optical axis of each LED element (11), and The first reflecting surface (21) having a predetermined width dimension (W2) in a direction perpendicular to the parallel arrangement direction of the LED elements (11);
The light source (10) crosses the optical axis of each LED element (11), and on both outer sides of the first reflecting surface (21) in a direction crossing the parallel arrangement direction of the LED elements (11). A pair of second reflecting surfaces (22) provided,
The ridge line (21b) of the first reflecting surface (21) is disposed at substantially the center of the light irradiation angle range of the light source (10),
The pair of surfaces (21a) form an angle of 60 ° to 120 ° with each other in the vicinity of the ridge line (21b),
The distance (D) between the ridge line (21b) of the first reflecting surface (21) and the light transmitting cover (12) of the light source (10) is the predetermined width dimension of the first reflecting surface (21). (W2) or less,
The first reflection surface (21) is disposed in a space between the pair of second reflection surfaces (22), and the pair of second reflection surfaces (22) is the first reflection surface ( 21) Reflecting the light reflected by 21) and the light directly emitted from the light source (10).
In the illuminating device in any one of Claim 1, 2, or 3,
The pair of surfaces (21a) of the first reflecting surface (21) is a flat lighting device.
In the illuminating device in any one of Claims 1, 2, 3, or 4,
The center line average roughness of the pair of surfaces (21a) of the first reflecting surface (21) is 0.5 μm or more.
In the illuminating device in any one of Claims 1, 2, 3, 4 or 5,
The vicinity of the second reflection surface (22) in the pair of surfaces (21a) of the first reflection surface (21) and the vicinity of the first reflection surface (21) in the second reflection surface (22). An illumination device having an angle between 100 ° and 140 °.
In the illuminating device in any one of Claims 1, 2, 3, 4, 5 or 6,
Each 2nd reflective surface (22) is formed with the single or several plane. The illuminating device.
In the illuminating device in any one of Claims 1, 2, 3, 4, 5 or 6,
Each of the second reflecting surfaces (22) intersects with the optical axis of each LED element (11) and is arranged in parallel in a direction intersecting with the juxtaposed direction of the LED elements (11). (22a, 22b, 22c, 22d)
The lighting device in which each surface (22a, 22b, 22c, 22d) of each second reflecting surface (22) forms an angle of 155 ° or more with an adjacent surface (22a, 22b, 22c, 22d).
The lighting device according to claim 8.
Each surface (22a, 22b, 22c, 22d) in each of the second reflecting surfaces (22) forms an angle of 160 ° or more and 175 ° or less with an adjacent surface (22a, 22b, 22c, 22d). apparatus.
A lighting device,
A fluorescent tube (31) extending in a predetermined direction, an in-lamp reflector (40) extending along the fluorescent tube (31), and a fluorescent material (31) extending from the translucent material. A fluorescent lamp (30) having a translucent cover (32) extending in the installation direction, wherein the fluorescent tube (30) is interposed between the in-lamp reflector (40) and the translucent cover (32). 31) is disposed, and the fluorescent lamp (30) irradiates light in a predetermined light irradiation angle range in a direction orthogonal to the extending direction of the fluorescent tube (31);
The fluorescent lamp (30) includes a pair of surfaces (21a) extending in the extending direction of the fluorescent tube (31), and faces the fluorescent lamp (30) at a portion where the pair of surfaces (21a) intersect. A first reflecting surface (21) formed with a convex ridge line, the first reflecting surface (21) having a light irradiation angle range of the light irradiated from the fluorescent lamp (30). It is arranged to receive light within a range of 10 ° with respect to the center, and the pair of surfaces (21a) form an angle of 60 ° to 120 ° with each other in the vicinity of the ridge line (21b). The first reflecting surface (21),
A pair of second reflecting surfaces (22) provided on both outer sides of the first reflecting surface (21) in a direction orthogonal to the extending direction of the fluorescent tube (31) of the fluorescent lamp (30); Prepared,
The first reflection surface (21) is disposed in a space between the pair of second reflection surfaces (22), and the pair of second reflection surfaces (22) is the first reflection surface ( 21) Reflects the light reflected by 21) and the light directly emitted from the fluorescent lamp (30).
The lighting device according to claim 10.
The in-lamp reflector (40) of the fluorescent lamp (30) is:
Consisting of a pair of surfaces (41a) extending in the extending direction of the fluorescent tube (31), a convex ridge line is formed at the intersection of the pair of surfaces (41a) toward the fluorescent tube (31). A first reflecting surface (41),
A pair of second reflecting surfaces (42) provided on both sides of the first reflecting surface (41a) in a direction orthogonal to the extending direction of the fluorescent tube (31),
The first reflecting surface (41) of the in-lamp reflecting plate (40) is disposed in a space between the pair of second reflecting surfaces (42) of the in-lamp reflecting plate (40), The pair of second reflecting surfaces (42) of the in-lamp reflecting plate (40) is reflected by the first reflecting surface (41) of the in-lamp reflecting plate (40) and the fluorescent tube (31). A lighting device that reflects light directly irradiated from the lighting device.
An illumination device having a fluorescent tube (31) extending in a predetermined direction and a reflector (20) extending along the fluorescent tube (31),
The fluorescent tube (31) irradiates light in a light irradiation angle range of 360 ° in a direction orthogonal to the extending direction,
The reflector (20) receives light in a predetermined light irradiation angle range among the light emitted from the fluorescent tube (31),
In the reflector (20),
Consisting of a pair of surfaces (21a) extending in the extending direction of the fluorescent tube (31), a convex ridge line toward the fluorescent tube (31) side at a portion where the pair of surfaces (21a) intersect ( 21b) is a first reflecting surface (21), and this first reflecting surface (21) emits light in a predetermined light irradiation angle range out of light emitted from the fluorescent tube (31). The first reflecting surface (21), which is arranged to receive light, and the pair of surfaces (21a) form an angle of 60 ° or more and 120 ° or less in the vicinity of the ridge line (21b);
A pair of second reflecting surfaces (22) provided on both outer sides of the first reflecting surface (21) in a direction orthogonal to the extending direction of the fluorescent tube (31),
The first reflection surface (21) is disposed in a space between the pair of second reflection surfaces (22), and the pair of second reflection surfaces (22) is the first reflection surface ( 21) Reflecting the light reflected by 21) and the light directly emitted from the fluorescent tube (31).
In the illuminating device in any one of Claim 10, 11, or 12,
The vicinity of the second reflection surface (22) in the pair of surfaces (21a) of the first reflection surface (21) and the vicinity of the first reflection surface (21) in the second reflection surface (22). The lighting device is at least 100 ° and not more than 140 °.
A fluorescent tube (31) extending in a predetermined direction, a reflector (40) extending along the fluorescent tube (31), and an extending direction of the fluorescent tube (31) made of a translucent material A fluorescent lamp having a translucent cover (32) extending to
The fluorescent tube (31) is disposed between the reflector (40) and the translucent cover (32),
In the reflector (40),
Consisting of a pair of surfaces (41a) extending in the extending direction of the fluorescent tube (31), a convex ridge line (41b) toward the fluorescent tube (31) side at a portion where the pair of surfaces (41a) intersect. ) Formed with the first reflecting surface (41),
A pair of second reflecting surfaces (42) provided on both sides of the first reflecting surface (41) in a direction orthogonal to the extending direction of the fluorescent tube (31),
The first reflection surface (41) is disposed in a space between the pair of second reflection surfaces (42), and the pair of second reflection surfaces (42) is the first reflection surface ( 41) A fluorescent lamp configured to reflect the light reflected by 41) and the light directly emitted from the fluorescent tube (31).
The fluorescent lamp according to claim 14, wherein
The fluorescent tube (31) irradiates light in a light irradiation angle range of 360 ° in a direction orthogonal to the extending direction,
The first reflecting surface (41) is disposed so as to receive light in a predetermined light irradiation angle range among light irradiated from the fluorescent tube (31).
The fluorescent lamp according to claim 14 or 15,
This fluorescent lamp has a plurality of the fluorescent tubes (31),
The said reflecting plate (40) is each provided with respect to each fluorescent tube (31). Fluorescent lamp.
The fluorescent lamp according to any one of claims 14, 15 and 16,
The vicinity of the second reflection surface (42) in the pair of surfaces (41a) of the first reflection surface (41) and the vicinity of the first reflection surface (41) in the second reflection surface (42). A fluorescent lamp having an angle between 100 ° and 140 °.