JP5781374B2 - Lighting device - Google Patents

Description

  The present invention relates to an illumination device using a solid light emitting element as a light source.

  In recent years, solid state light emitting devices such as semiconductor lasers and light emitting diodes have attracted attention as new light sources that can replace incandescent bulbs and fluorescent lamps as environmental awareness increases. In particular, a light emitting diode (hereinafter referred to as LED) has a long life and high light conversion efficiency, and an illuminating device using the LED as a light source has attracted attention.

  For example, Patent Document 1 discloses a ring-shaped illumination device using an LED as a light source. In this illuminating device, an annular substrate on which a plurality of LEDs are mounted is housed in an annular tubular housing formed by separating an upper housing and a lower housing. Here, the plurality of LEDs are attached in parallel to a plane including the axis of the tube in the housing.

  Patent Document 2 discloses a ring-shaped lighting device in which one of annular substrates on which a plurality of LEDs are mounted is covered with a diffusing member and a heat radiating member is provided on the other. Also in this case, the plurality of LEDs are attached in parallel to a plane including the axis of the tube in the annular tubular member constituted by the diffusion member and the heat dissipation member.

JP 2010-135271 A (released on June 17, 2010) JP 2010-15713 A (published January 21, 2010)

  However, in the illumination devices of Patent Documents 1 and 2, the position of the illumination device is extremely bright, the problem of uneven illumination such as darkness in the surroundings other than the directly below location, and the narrowness of light distribution such that light is not irradiated to the ceiling side. There is a problem.

  This is due to the orientation of the optical axis of the mounted LED. The optical axis of the LED is an axis in the normal direction (direction perpendicular to the light emitting surface) of the light emitting surface of the LED. The luminance is highest when the light is emitted from the LED or when the light emission direction is the optical axis direction, and the luminance decreases as the light emission direction is inclined from the optical axis direction.

  As described above, in the illuminating devices of Patent Documents 1 and 2, the LED is attached in parallel to a plane including the axis of the tube in an annular casing or the like. In the case of a normal LED in which the light emitting surface of the LED is parallel to the LED mounting surface, the optical axis of the LED is parallel to the normal direction of the main irradiated surface such as a floor. For this reason, the light with the highest luminance emitted from the LED in the optical axis direction illuminates directly under the lighting device, and the illuminance at the position immediately below is inevitably high. In addition, because of the ring tube shape, the light concentrates in the central portion of the ring, and the position directly below is illuminated by this light, so that the illuminance is further increased. The light concentrated on the central part of the ring is light having a low luminance emitted obliquely from the LED (with an inclination with respect to the optical axis direction), but the light from a plurality of LEDs arranged in an annular shape. Because they are concentrated and overlapped, it becomes extremely bright. On the other hand, since the low brightness light emitted obliquely is further spread and irradiated around the position immediately below, it inevitably becomes dark.

  In addition, in an illuminating device attached so that the optical axis of the LED is parallel to the normal direction of the main irradiated surface, no light is irradiated to the mounting surface side such as a ceiling to which the illuminating device is attached, Light distribution becomes narrower.

  The present invention has been made in view of the above problems, and its purpose is to irradiate light over a wide range without being biased to a position directly below, while suppressing unevenness, and to the mounting surface side of a lighting device such as a ceiling side. An object of the present invention is to provide an illumination device capable of light distribution (wide light distribution).

  In order to solve the above problems, an illumination device according to the present invention is an illumination device including a plurality of solid light emitting elements arranged in a ring and a case member that transmits light emitted from the plurality of solid light emitting elements. The plurality of solid state light emitting devices are arranged such that the optical axis is inclined with respect to the normal direction of the irradiated surface so as to be directed toward the radially outer side of the ring formed by the plurality of solid state light emitting devices. It is said.

  The luminance of the light emitted from each solid state light emitting element is highest when the light emitting direction is the direction of the optical axis (optical axis direction) which is the normal axis of the light emitting surface of the solid state light emitting element. As the light emission direction is inclined from the optical axis, the luminance gradually decreases. In the above configuration, the plurality of solid state light emitting devices are arranged with the optical axis inclined toward the radially outer side of the ring formed by the plurality of solid state light emitting devices with respect to the irradiated surface. The light with the highest brightness (light emitted in the optical axis direction) is emitted radially outside the ring with respect to the direction directly below the illumination device, which is the normal direction of the main irradiated surface such as the floor surface. Irradiated at an angle. Therefore, the light with the highest luminance emitted in the optical axis direction can be irradiated around the position immediately below. In the position immediately below, low-luminance light emitted obliquely (with an inclination with respect to the optical axis) from each solid-state light-emitting element is irradiated, but emitted from a plurality of solid-state light-emitting elements. Since the light overlaps, it is possible to obtain an illuminance that is not inferior to the surrounding position irradiated with the light with the highest luminance. Furthermore, light emitted obliquely (with an inclination with respect to the optical axis) from each solid-state light emitting element is also irradiated to the mounting surface side of the lighting device such as the ceiling, so that a wide light distribution can be realized. it can.

  This effectively distributes the light emitted from the solid state light emitting device around the direct position without concentrating the light directly below the lighting device, and makes the main irradiated surface such as the floor uneven in a wide range. It is possible to control and illuminate, and light distribution (wide light distribution) to the mounting surface side of the lighting device such as the ceiling side is possible while ensuring the illuminance on the main irradiated surface.

  In the illumination device of the present invention, the plurality of solid state light emitting elements are housed inside an annular tubular body configured with at least a part of the case member, and the plurality of solid state elements are attached to the illumination device. The light emitting element can be configured to be inclined with respect to a surface including the axis of the tube of the annular tubular body in a direction in which the radially outer side of the ring of the annular tubular body is lifted to the mounting surface side of the lighting device. .

  In this case, the plurality of solid state light emitting elements can be configured to have an inclination of 30 to 60 degrees with respect to the plane including the axis of the tube of the annular tubular body, for example.

  With the above configuration, it is possible to easily realize the above-described illumination device of the present invention in which the optical axis is arranged to be inclined toward the radially outer side of the ring formed by the plurality of solid state light emitting elements with respect to the irradiated surface. it can.

  In this case, the annular tubular body is configured by the annular tubular case member and an annular heat radiating member that radiates heat from the plurality of solid state light emitting elements, and the heat radiating member is formed of the case member in the case member. Provided in an annular notch formed along the ring of the case member, which is an inner part of the ring and is formed in a part inclined with a curvature from the radially outer side to the radially inner side of the ring. The plurality of solid-state light emitting elements may be arranged on the outer surface of the annular heat dissipation member.

  According to this, it can comprise only by assembling | attaching the cyclic | annular heat radiating member in the state which attached the some solid light emitting element to the notch part formed in the annular tubular case member. Therefore, the effect that manufacture is easy is added. And since the heat radiating member is exposed to the outer surface of an illuminating device, heat dissipation is improved, the heat radiating member can be reduced in weight, and the illuminating device can also be reduced in weight.

  Further, in this case, a plurality of flat surfaces are formed on the outer surface of the annular heat radiating member so as to be continuous in the circumferential direction of the ring of the heat radiating member and inclined radially inward from the radially outer side of the ring. It is preferable that the solid-state light emitting element is arranged on the flat surface.

  When attaching a plurality of solid state light emitting elements to the annular heat dissipation member, they will be arranged side by side on the outer surface of the ring in the circumferential direction. There is a fear that you can not. When the contact cannot be made, heat from the solid state light emitting device is not efficiently transmitted to the heat radiating member, and heat dissipation is reduced. Therefore, in such a case, some device is required, such as another member for bringing the solid light emitting element into close contact with the heat radiating member.

  On the other hand, according to the above configuration, since the outer surface of the tube is a plurality of flat surfaces continuous in the circumferential direction of the ring, and the solid light emitting element is attached to the flat surface, the solid light emitting element is attached to the heat dissipation member. Without providing a separate member or the like, it can be arranged in close contact with each other, and heat dissipation can be improved.

  Further, in this case, the plurality of solid state light emitting devices may include a set arranged obliquely at a first angle and a set arranged obliquely at a second angle.

  According to this, the region where the light having the highest luminance is irradiated between the set of solid state light emitting elements arranged obliquely at the first angle and the set of solid state light emitting elements arranged obliquely at the second angle, The areas irradiated with light with low brightness emitted obliquely are different. Therefore, it is possible to illuminate uniformly while further suppressing unevenness in illuminance, and to enable wide light distribution.

  In order to solve the above-described problem, the illumination device of the present invention includes a plurality of solid state light emitting elements that are accommodated in parallel, and a first case member configured to transmit light from the solid state light emitting element. And the second tubular body, wherein the plurality of solid state light emitting elements include an optical axis of the solid state light emitting element housed in the first tubular body in a state in which the lighting apparatus is attached and the second solid state light emitting element. The solid-state light-emitting elements housed in the tubular body are arranged so that the optical axes of the solid-state light emitting elements face each other and are inclined with respect to the normal direction of the irradiated surface.

  According to this, the first and second tubular bodies in which the plurality of solid state light emitting elements are provided in parallel inside the case member are arranged such that the optical axes of the plurality of solid state light emitting elements are mutually connected in a state where the lighting device is attached. Since the light emitting element is disposed so as to incline with respect to the normal line direction of the irradiated surface, the light with the highest luminance emitted from each solid light emitting element inside the first and second tubular bodies (optical axis direction) Are emitted toward the outside with respect to the normal direction of the main irradiated surface such as the floor surface. Therefore, the light with the highest luminance emitted in the optical axis direction can be applied to both sides of the position immediately below the illumination device having the first and second tubular bodies. Then, at a position directly below the illumination device, the brightness emitted from the solid light emitting elements inside the first and second tubular bodies obliquely toward the inside (inclined with respect to the optical axis) is low. Although the light is irradiated, the light emitted from the respective solid state light emitting elements inside the first and second tubular bodies overlaps, so that the illuminance is not inferior to both sides immediately below the position where the light having the highest luminance is irradiated. Can be obtained. Furthermore, the light emitted obliquely (with an inclination with respect to the optical axis) from the respective solid state light emitting elements inside the first and second tubular bodies is also irradiated on the mounting surface side of the lighting device such as the ceiling. Therefore, a wide light distribution can be realized.

  This effectively distributes the light emitted from the solid state light emitting device around the direct position without concentrating the light directly below the lighting device, and makes the main irradiated surface such as the floor uneven in a wide range. It is possible to control and illuminate, and light distribution (wide light distribution) to the mounting surface side of the lighting device such as the ceiling side is possible while ensuring the illuminance on the main irradiated surface.

  According to the present invention, the light emitted from the solid state light emitting element is effectively distributed to the periphery of the position immediately below the light source without concentrating the light at the position directly below the lighting device, so that the main irradiated surface such as the floor is in a wide range. Thus, it is possible to illuminate while suppressing unevenness, and light distribution (wide light distribution) to the mounting surface side of the lighting device such as the ceiling side is possible while ensuring illuminance on the main irradiated surface.

FIG. 1 (a) is a plan view of a ring-shaped lamp according to an embodiment of the present invention, FIG. 1 (b) is a bottom view of the ring-shaped lamp, and FIG. It is a side view of an annular tube lamp. It is AA arrow sectional drawing of Fig.1 (a). It is a BB arrow directional cross-sectional view of FIG.1 (b). It is a disassembled perspective view of the said annular tube lamp. It is explanatory drawing which shows typically the light distribution of the said annular tube lamp, and those light distributions paying attention to two LED located in the right side and the left side on both sides of the center of a ring in an annular tube lamp Is shown. In the said ring-shaped tube lamp, it is explanatory drawing which shows typically one Example which was able to make equivalent the illumination intensity of a direct lower position and a periphery position. FIG. 7A and FIG. 7B are cross-sectional views each showing the configuration of a ring-shaped lamp of a modification of the present embodiment. It is explanatory drawing which shows typically the structure of the illuminating device of the other form of implementation of this invention.

  Hereinafter, preferred embodiments of the present invention will be specifically described with reference to the drawings.

  1 to 4 show an annular lamp 100 that is an illumination device of the present embodiment according to the present invention. 1A is a plan view of the ring-shaped lamp 100, FIG. 1B is a bottom view of the ring-shaped lamp 100, and FIG. It is a side view. In a state where the annular tube lamp 100 is attached to a lighting fixture or the like (not shown), the side shown in the bottom view faces the main irradiated surface such as the floor, and the surface shown in the plan view corresponds to the ceiling or the like. It faces the mounting surface of the ring-shaped lamp 100. 2 is a cross-sectional view taken along line AA in FIG. 1A, and FIG. 3 is a cross-sectional view taken along line BB in FIG. FIG. 4 is an exploded perspective view of the annular tube lamp 100.

  As shown in any of FIGS. 1 to 4, the annular lamp 100 according to the present embodiment includes an annular tubular body 14, a plurality of LEDs (solid state light emitting elements) 2 housed in the annular tubular body 14, An LED substrate 3 on which a plurality of LEDs are mounted, a heat sink (heat radiating member) 6 that radiates heat from the LEDs 2, and a base 12 are provided.

  The annular tubular body 14 is an annular tubular member, at least a part of which is made of the case member 1, and accommodates a plurality of LEDs 2 therein. In the present embodiment, the annular tubular body 14 includes a part of the case member 1 and the heat sink 6. The annular tubular case member 1 constituting most of the annular tubular body 14 is formed of a synthetic resin having translucency such as polycarbonate, and transmits light emitted from the LED 2 while diffusing. . In the annular tubular body 14, the portion made of the case member 1 serves as a light emitting surface that transmits light from the LED 2 while diffusing.

  As shown in FIG. 4, the case member 1 is formed with an opening 11 a for attaching the base 16 and an opening 11 b for inserting the power supply board 15 at a portion where the base 16 is attached. The base 12 is connected to the power supply board 15 by wiring, and feeds commercial power to the power supply board 15. The power supply board 15 converts the supplied commercial power source into a direct current / direct current voltage required by the LED 2 of the light emitting unit, and supplies power to the LED 2. The case member 1 is provided with an opening 11a according to the shape of the base 16, and the base 16 is inserted into the opening 11a during assembly. Further, the case member 1 is formed with an annular notch 11c along the ring of the case member 1, and an annular heat sink 6 on which a plurality of LEDs 2 are mounted is attached to the notch 11c. Yes. The power supply substrate 15 inserted from the opening 11 b provided in the case member 1 is enclosed in the case member 1 by covering the opening 11 b with the case upper lid 12.

  In addition, although the cross-sectional shape of the direction orthogonal to the direction where the pipe | tube of the annular tubular body 14 extends shows circular shape in FIG. 2, the cross-sectional shape may be elliptical shape. Further, the annular tubular body 14 may be entirely composed of the case member 1. However, in that case, in order to accommodate the annular heat sink 6 on which the plurality of LEDs 2 are mounted inside the case member 1, the case member is separated vertically into a plane including the axis of the tube of the case member. Need to be formed.

  The heat sink 6 is a member for releasing the heat generated in the LED 2, and as the material, aluminum that is excellent in thermal conductivity and light in weight is exclusively used. In the present embodiment, as described above, the heat sink 6 is attached to the notch 11 c formed in the case member 1, thereby constituting a part of the annular tubular body 14. Since such a heat sink 6 is arrange | positioned in the whole region of the direction where the pipe | tube extends in the annular tubular body 14 (case member 1), in addition to the function as a heat radiating member, the shape of the annular tubular body 14 (case member 1) It also functions as a structure of the annular tube lamp 100 that holds

  The plurality of LEDs 2 are light sources of the annular tube lamp 100 mounted on the heat sink 6. The plurality of LEDs 2 are annularly arranged on the heat sink 6 so as to be arranged at a predetermined interval. As shown in FIG. 2, the plurality of LEDs 2 are arranged such that the optical axis S of the LED 2 is in the radial direction of the ring (ring of the heat sink 6) formed by the plurality of LEDs 2 with respect to the normal direction of the irradiated surface such as the floor. Inclined so as to face outward. By arranging the plurality of LEDs 2 in this manner, the main irradiated surface such as a floor can be illuminated with a wide range of illuminance while suppressing illuminance unevenness, while ensuring the illuminance on the main irradiated surface, etc. Light distribution (wide light distribution) to the mounting surface side of the annular tube lamp 100 becomes possible. This will be described later.

  The LED 2 is disposed on the heat sink 6 via the LED substrate 3. The LED substrate 3 is made of, for example, a glass epoxy resin, and a wiring (not shown) is formed on the surface. The plurality of LEDs 2 are connected to the power supply substrate 15 by the wiring. As the LED 2, for example, a white LED configured in a surface mount package type is preferably used. In addition, what is shown with the referential mark 9 in a figure is a holding body of each LED2.

  The base 12 electrically connects the power supply board 15 and a wiring extending from a lighting fixture (not shown) to which the annular lamp 100 is attached. The annular tube lamp 100 of the present embodiment is configured to include the power supply substrate 15. However, instead of the power supply substrate 15, a plurality of LEDs 2 are turned on by power supply from a conventional annular tube fluorescent lighting device. It can also be set as the structure which can be used instead of a ring-shaped fluorescent lamp for the conventional ring-shaped fluorescent lighting fixture by providing such a member.

  Next, the notch 11c formed in the case member 1, the heat sink 6 attached to the notch 11c, and how to assemble them will be described with reference to FIGS.

  The notch portion 11c is an inner portion of the ring of the case member 1 in the case member 1 and is formed in a portion inclined with a curvature from the radially outer side to the radially inner side of the ring. In other words, the notch portion 11c is a mounting surface (ceiling) of the annular tube lamp 100 of the case member 1 which is divided into two along the surface including the axis of the tube of the case member 1 in the case member 1. And the inner peripheral side of the ring of the case member 1. As described above, the notch portion 11 c is formed in an annular shape along the ring of the case member 1.

  The heat sink 6 attached to the notch 11c is also formed in an annular shape so as to become a part of the annular tubular body 14 by being attached to the notch 11c. As shown in FIG. 2, the heat sink 6 has an exposed surface 6a made of a curved surface that becomes a part of the annular tubular body 14, and the exposed surface 6a is in direct contact with the outside air. It functions as a heat exchanging part that releases the heat of the LED 2 to the outside air. The surface opposite to the exposed surface 6 a side of the heat sink 6 is an arrangement surface 6 b of the LED 2. The arrangement surface 6b is arranged on the outer side in the radial direction of the ring of the annular tubular body 14 with respect to the surface Y including the axis X of the tube of the annular tubular body 14 (the dashed line in the figure). Inclined in the direction of lifting to the (ceiling side) side.

  The heat sink 6 can also be expressed as having a shape obtained by rounding a hollow cone along the radial direction of a circle. The tapered surface outside the ring-shaped annular body is the arrangement surface 6 b, and a plurality of LEDs 2 are attached to the arrangement surface 6 b via the LED substrate 3.

  The electric board 15 and the base 16 are electrically and mechanically connected to the LED board 3 on which the plurality of LEDs 2 are mounted, and the LED board 3 is fixed to the heat sink 6 so that it is handled as an integral part of the heat sink 6. be able to.

  In such a configuration, the annular heat sink 6 with the electric substrate 15, the base 16, and the plurality of LEDs 2 attached thereto is assembled to the notch 11 c formed in the annular tubular case member 1, and then the case upper lid 12 is attached. The annular tube lamp 100 can be manufactured by fitting. Therefore, even when the annular heat sink 6 is accommodated in the annular tubular case member 1, there is an advantage that it is easy to manufacture. In addition, since the exposed surface 6a of the heat sink 6 is exposed on the outer surface of the annular tube lamp 100, heat dissipation is improved, the weight of the heat dissipation member can be reduced, and the weight of the lighting device can be reduced.

  By the way, in order to ensure heat dissipation, it is necessary to adhere LED2 to the heat sink 6 via the LED board 3. FIG. However, in the annular heat sink 6, the arrangement surface 6 b has a curvature because it is the circumference of the ring, and if the diameter of the ring is small, there is a possibility that the LED 2 cannot be brought into close contact with the heat sink 6. Some device is necessary, such as another member to make it.

  Therefore, in the present embodiment, as shown in FIG. 3, the arrangement surface 6 b of the LED 2 in the heat sink 6 is formed by a plurality of flat surfaces 6 c that are continuous in the circumferential direction of the ring and are inclined from the radially outer side of the ring to the radially inner side. The LED 2 is disposed on the flat surface. Thereby, it becomes possible to arrange the LED 2 in close contact with each other without providing a separate member or the like for bringing the LED 2 into close contact with the heat sink 6, and heat dissipation can be improved.

  However, when the ring size of the heat sink 6 is so large that the curvature of the arrangement surface 6b does not cause a problem, it is not necessary to process the flat surface 6c.

  Next, the direction of the plurality of LEDs 2 attached to the heat sink 6 will be described.

  As described above, the arrangement surface 6b of the LED 2 in the heat sink 6 is located on the outer side in the radial direction of the ring of the annular tubular body 14 with respect to the plane Y (the dashed line in the figure) including the axis X of the tube of the annular tubular body 14. It inclines in the direction raised to the attachment surface (ceiling side) side of the ring-shaped lamp 100 (refer FIG. 2).

  Therefore, the optical axis S (axis in the normal direction of the light exit surface) S of the LED 2 attached to the arrangement surface 6b is not directly below the annular tube lamp 100, which is the normal direction of the irradiated surface, but from directly below. Also, the ring-shaped tubular body 14 is arranged so as to face a direction inclined radially outward of the ring. When the annular tube lamp 100 is attached to a ceiling surface parallel to the floor surface or the like, the direction directly below the annular tube lamp 100 is the normal direction of the surface Y including the axis X of the annular tube body 14. Become.

  The LED 2 is disposed so that its optical axis S is not in the direct downward direction but in a direction inclined radially outward of the ring of the annular tubular body 14 with respect to the direct downward direction. The light emitted from the LED 2 can be effectively distributed around the position immediately below without concentrating the light. As a result, the main irradiated surface such as the floor can be illuminated in a wide range while suppressing unevenness in illuminance, and the mounting surface side of the annular lamp 100 such as the ceiling side is secured while ensuring the illuminance on the main irradiated surface. Light distribution (wide light distribution) is possible.

  FIG. 5 shows the light distribution from the annular tube lamp 100. In FIG. 5, in the annular tube lamp 100, two LEDs 2R and 2L positioned on the right side and the left side across the center of the ring are shown.

  The light emitted from the LED 2 has the highest luminance when emitted in the optical axis direction, that is, light emitted in the normal direction of the light emitting surface of the LED 2. The luminance gradually decreases as the angle at which the light is emitted is inclined with respect to the optical axis, that is, as the angle formed with respect to the normal direction is increased.

  In the case of the LEDs 2R and 2L, since they are mounted obliquely as described above, the light L1 having the highest luminance emitted from the LEDs 2R and 2L in the optical axis direction is directed to the main irradiated surface such as the floor surface. The normal direction Z (two-dot chain line) of the plane Y (one-dot chain line) including the axis X of the tube of the annular tubular body 14, that is, the radial direction of the ring of the annular tubular body 14 rather than the direction directly below the annular tube lamp 100. Inclined outward and emitted. That is, the light L1 having the highest luminance emitted from the LED 2R is irradiated to the peripheral position P3 shifted to the right side from the position P1 directly below, and the light L1 having the highest luminance emitted from the LED 2L is on the left side from the position P1 directly below. Irradiated to the peripheral position P2 shifted to. The amount of deviation from the immediately lower position P1 to the left and right becomes larger as the angle θ (inclination angle) formed with respect to the surface Y (one-dot chain line) on the arrangement surface 6b is larger, and the wider area around the immediately lower position P1 is irradiated. can do.

  As described above, by attaching the LED 2 obliquely as described above, the light L1 having the highest luminance can be emitted to the periphery of the direct position P1, and the light is emitted to a range further away from the direct position P1. Therefore, the irradiation range can be expanded as compared with the configuration in which the light L1 having the highest luminance is applied to the position P1 directly below.

  On the other hand, although the light emitted obliquely from the LEDs 2R and 2L is irradiated at the position P1 directly below the light axis direction, the light emitted from the LEDs 2R and 2L is at the position P1 directly below. Since they overlap, it is possible to obtain an illuminance that is not inferior to the surrounding positions P2 and P3 irradiated with the light L1 having the highest luminance.

  In addition, the light emitted from the LEDs 2R and 2L obliquely with respect to the optical axis direction is also radiated to the mounting surface side of the annular lamp 100 such as the ceiling. Light can be realized.

  In addition, although not shown in figure, between the direct position P1 and the surrounding positions P2 and P3, the light contained between the light with the highest brightness | luminance and the lowest is irradiated. In addition, all of the above-described lights L1, L2, and L3 are diffused by the case member 1, and the diffused light is irradiated in various directions.

  FIG. 6 shows an example in which the illuminance between the direct position P1 and the peripheral positions P2 and P3 can be made equal in the ring-shaped lamp 100. In the example of FIG. 6, the height of the tube axis X of the annular tubular body 14 from the floor surface is 2200 mm, the inclination angle θ of the LED 2 is 45 degrees, and the interaxial distance in the annular tubular body 14 (between the axis X and the axis X). ) Is 373 mm. The illuminance of the main irradiated surface is determined by the arrangement of the LED 2, the light distribution characteristics of the LED device constituting the LED 2, the transmittance / dispersion degree (diffusivity) of the cover of the case member 1 constituting the annular tubular body 14, It can be controlled by the inner diameter of the tube, the distance from the floor surface of the annular tubular body 14, the diameter of the annular tubular body 14, and the like.

  FIG. 7A and FIG. 7B show annular tube lamps 100A and 100B according to modifications of the present embodiment. 7A and 7B show a cross-sectional shape in a direction perpendicular to the axis X of the tube of the annular tubular body 14.

  The annular tube lamp 100A includes a heat sink 6A that is wider than the previous annular tube lamp 100, and the LEDs 2 are mounted in a plurality of rows (two rows in the figure) on the arrangement surface 6b. By arranging the LEDs 2 in a plurality of rows, a larger number of LEDs 2 can be mounted than in a row, so that the illuminance can be increased. Moreover, LED2 can also be used combining two colors, white and white. Of course, a combination of two colors is also possible in the one-row arrangement.

  The ring-shaped lamp 100B is wider than the previous ring-shaped lamp 100, and the arrangement surface 6b of the LED 2 is formed with respect to the angle θ (the surface Y including the axis X of the tube of the ring-shaped tubular body 14). A heat sink 6B having a plurality of surfaces (two surfaces in the drawing) having different angles θ) is provided. For example, the arrangement surface 6b-1 and the arrangement surface 6b-2 form an angle of 120 degrees, and the center is aligned with the axis X so that the center is at a position of 45 degrees with respect to the plane Y including the axis X. Is provided. In this case, θ1 (first angle) that is the angle θ is set to 15 degrees on the arrangement surface 6b-1, and θ2 (second angle) that is the angle θ is set to 75 degrees on the arrangement surface 6b-2. Has been.

  Also in these cases, the optimal arrangement of the LED 2 described above is determined by the light distribution characteristics of the LED device that constitutes the LED 2, the transmittance / dispersion degree (diffusivity) of the case member 1, the inner diameter of the case member 1, and the like.

  In particular, according to the ring-shaped lamp 100B, in the optical axis direction, there are two sets of a set of LEDs 2 obliquely arranged at a first angle and a pair of solid-state light emitting elements arranged obliquely at a second angle. Since the area irradiated with the light with the highest brightness emitted from and the area irradiated with the light with the low brightness emitted obliquely from the optical axis are different, the illumination is evenly suppressed with even more uneven illumination. And wide light distribution is possible.

  Finally, using FIG. 8, if it is an illuminating device provided with a plurality of LEDs 2 that are irradiated with light through the case member 61 as well as an annular tube illuminating device, a plurality of LEDs 2 are attached obliquely, Based on the illuminance when the main surface to be irradiated is irradiated through the case member 1 at an angle, light having low luminance compared to the light emitted in the optical axis direction overlaps with each other on the surface to be irradiated. By setting the illumination intensity to be equivalent to that of the area irradiated with the light with the highest luminance, it is possible to effectively illuminate the light and realize an illumination device with a wide light distribution while suppressing uneven illumination. explain.

  FIG. 8 shows an illuminating device including, for example, two straight-tube-type lamps 101 and 102 in which a plurality of LEDs 2 are arranged in parallel. -LED2 arrange | positioned inside 102 shows the structure attached to the holding member 70 diagonally so that it might face an outer side rather than a direct lower position.

  The straight tube lamps 101 and 102 are attached to the optical axis of the LED 2 housed in the case member 61 of the straight tube lamp 101 and the LED 2 housed in the case member 61 of the straight tube lamp 102. Are arranged so as to be inclined with respect to the surface to be irradiated so as to face each other, not directly downward.

  With this configuration, the light L1 having the highest luminance emitted from the LEDs 2 of the straight tube lamps 101 and 102 in the optical axis direction is directed outward from the main irradiated surface such as the floor surface. Is irradiated. Therefore, it is possible to irradiate the light L1 having the highest luminance on both sides of the position immediately below the illumination device including the straight tube lamps 101 and 102. Then, at a position directly below the illuminating device including the straight tube lamps 101 and 102, the luminance emitted obliquely (with an inclination with respect to the optical axis) from each LED 2 of the straight tube lamps 101 and 102 is shown. Although low light will be irradiated, since these overlap, the illuminance which is not inferior to both sides of the position immediately under the light with the highest luminance can be obtained. Furthermore, the light emitted obliquely from each LED 2 of the straight tube lamps 101 and 102 is also irradiated on the mounting surface side of the lighting device such as the ceiling, so that a wide light distribution can be realized.

  As a result, the light emitted from the LED 2 is effectively distributed to the periphery of the direct position without concentrating the light directly under the lighting device, and unevenness of the main irradiated surface such as the floor is suppressed over a wide range. In addition to being able to illuminate, light distribution (wide light distribution) to the mounting surface side of the lighting device such as the ceiling side becomes possible while ensuring illuminance on the main irradiated surface.

  The present invention is not limited to the above-described embodiments, and various modifications are possible within the scope shown in the claims, and embodiments obtained by appropriately combining technical means disclosed in different embodiments. Is also included in the technical scope of the present invention.

1 Case member 2 LED
2R / 2L LED
3 LED board 6 Heat sink 6A Heat sink 6B Heat sink 6a Exposed surface 6b Arranged surface 6b-1 Arranged surface 6b-2 Arranged surface 6c Flat surface 11c Notch 12 Case upper lid 14 Ring-shaped tubular body 15 Power supply board 16 Base 61 Case member 70 Holding member 100A / 100B Ring tube lamp 101/102 Straight tube lamp P1 Directly below position P2 / P3 Ambient position Z Normal direction θ Inclination angle S Optical axis L1 Light L2 emitted in the optical axis direction Light

Claims (4)

A plurality of solid state light emitting devices arranged in a ring;
An annular device containing the plurality of solid state light emitting elements therein, and a lighting device comprising:
The annular tubular body includes an annular tubular case member that transmits light emitted from the plurality of solid state light emitting elements, and an annular heat radiation member that radiates heat from the plurality of solid state light emitting elements,
The heat radiating member is provided in an annular notch along the ring formed by the case member,
The notch is formed on the inner peripheral side of the case member and on the mounting surface side of the lighting device,
The plurality of solid state light emitting elements are arranged on the surface of the heat radiating member located inside the case member so that the optical axis is inclined toward the radially outer side of the ring with respect to the normal direction of the irradiated surface. In the state where the lighting device is attached, the illumination device is inclined with respect to the surface including the axis of the tube of the annular tubular body in a direction of lifting the radially outer side of the ring toward the attachment surface. Lighting device. On the surface of the heat radiating member located inside the case member, there are formed a plurality of flat surfaces that are continuous in the circumferential direction of the ring formed by the heat radiating member and are inclined from the radially outer side of the ring to the radially inner side. cage lighting device of claim 1, wherein the solid-state light-emitting element to the flat surface is disposed. The solid-state light-emitting element, the relative plane containing the axis of the ring the tubular body of the tube, the lighting device according to claim 1 or 2, characterized in that it has an inclination of 30-60 degrees. The plurality of solid state light emitting devices, a pair disposed obliquely at a first angle, any one of claims 1 to 3, characterized in that it comprises a pair arranged obliquely at a second angle The lighting device according to item 1.

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