JP2014017182A - Illumination device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To mix colors of light from light sources having different light colors to suppress color unevenness generated on a light-emitting face.SOLUTION: An illumination device 1 includes a body chassis 2a including a reflection sheet 3 for reflecting light, a light source 32 including plural light emitting elements having different colors, a lens 33 for emitting light from the light source 32 toward the reflection sheet 3, and a ring cover 9 that allows the light reflected off the reflection sheet 3 to pass therethrough. The lens 33 has embossing processing 33k1 formed in at least some areas of a light emission surface.

Description

  The present invention relates to an illumination device including a plurality of light sources having different colors and a lens that emits light from the light sources toward a reflecting surface.

  2. Description of the Related Art Conventionally, an illuminating device including a light source composed of a semiconductor light emitting element such as a light emitting diode (LED) and a lens for refracting light emitted from the light source is used.

  For example, in Patent Document 1, light is emitted to a reflector by a light-emitting diode serving as a light source and a long collimator lens disposed facing the light-emitting direction of the light-emitting diode, thereby reducing luminance unevenness as a whole. A lighting fixture with improved fixture efficiency is disclosed.

JP 2008-300203 A

  However, since a light emitting diode usually produces a white color by mixing blue light and yellow light by combining a blue LED and a yellow phosphor, when combined with a lens, the blue light and the yellow light are separated to form a light emitting surface. Color unevenness may occur on the cover. In addition, for example, when light of a predetermined color is emitted by combining light from a plurality of light emitting diodes having different color temperatures or colors, such as a light bulb color and a daylight color, light from each light source is generated by the lens. In some cases, color unevenness occurs in the cover without color mixing.

  The present invention has been made in view of the above problems, and an object of the present invention is to provide an illumination device capable of suppressing color unevenness generated on a light emitting surface by mixing light from light sources having different colors.

  An illumination device according to the present invention includes a main body having a reflective surface that reflects light, a light source having a plurality of light emitting elements of different colors, a lens that emits light from the light source toward the reflective surface, An illumination device including a cover that transmits light reflected by a reflecting surface, wherein the lens has a first light scattering portion formed in at least a partial region of the light emitting surface.

  In the present invention, for example, by applying a first light scattering portion such as embossing to at least a part of the light exit surface of the lens, the light from the light source is scattered and emitted to be mixed and reflected. It is possible to make the light incident on the surface, thereby suppressing color unevenness in the cover forming the light emitting surface.

  In the illumination device according to the present invention, the lens is characterized in that the first light scattering portion is formed in a region on the reflection surface side of the light exit surface.

  In the present invention, the first light scattering portion is formed in a region on the reflection surface side of the light emission surface, thereby preventing a reduction in the amount of light emitted toward the region away from the lens of the reflection surface. In particular, it is possible to suppress a decrease in color unevenness of the light emitting surface due to light incident on a region close to the lens.

  Moreover, the illumination device according to the present invention is characterized in that the lens is provided so as to surround the light source in a circumferential shape.

  In the present invention, it is possible to suppress color unevenness that occurs in a facing region between lenses arranged so as to surround the light source in a circumferential manner.

In the illumination device according to the present invention, the lens has a second light scattering portion formed on the surface on the cover side. In the present invention, the lens is formed on the surface on the cover side of the lens. Two light scattering portions are formed. Thereby, it is possible to prevent uneven brightness from occurring in the cover by diffusing the light leaking from the surface on the cover side of the lens and emitted toward the cover.

  Moreover, the illuminating device according to the present invention is formed of a plurality of rod-shaped lenses.

  In the present invention, it is possible to prevent uneven brightness from occurring in the cover by diffusing the light leaking from the cover-side surface of the plurality of adjacent rod-shaped lenses by the second light scattering portion.

  In the illumination device according to the present invention, the rod-shaped lens is characterized in that the second light scattering portion is formed at both ends in the longitudinal direction.

  In the present invention, by forming the second light scattering portion at both ends in the longitudinal direction of the rod-shaped lens, the streaky emission line emitted from the end face of the adjacent lens is diffused, and the emission line becomes the cover. It is possible to prevent the appearance from being impaired by being projected.

  As described above, according to the present invention, it is possible to suppress color unevenness generated on the light emitting surface by mixing light from light sources having different colors.

It is the front view and side view which show the external appearance of the illuminating device concerning the 1st Embodiment of this invention. (A) is sectional drawing of the AA cross section shown in FIG. 1, (b) is an enlarged view of the B section shown to (a). It is a disassembled perspective view of the illuminating device shown in FIG. It is explanatory drawing which showed typically the advancing direction in the illuminating device of the light radiate | emitted from the light source unit with which the illuminating device shown in FIG. 1 is equipped. (A) is explanatory drawing which shows the structure of a main body chassis and a light source unit. (B) is an enlarged view of the F section shown in (a). (C) is explanatory drawing which shows the attachment method of a light source unit. It is explanatory drawing which shows the structure of the lens with which the illuminating device shown in FIG. 1 is equipped. It is a top view which shows the structure of the light source board with which the illuminating device shown in FIG. 1 is equipped. It is the perspective view which looked at the lens with which the illuminating device concerning the 2nd Embodiment of this invention is provided from the entrance plane side.

(First embodiment)
A first embodiment of the present invention will be described. In addition, although this embodiment demonstrates the case where it applies to the ceiling light attached to ceilings, such as a house, as an example, the application object of this invention is not restricted to this.

  FIG. 1 is a front view and a side view as seen from the floor side showing the appearance of the lighting device 1 according to the present embodiment. 2A is a cross-sectional view of the lighting apparatus 1 taken along the line AA shown in FIG. 1, and FIG. 2B is an enlarged view of a portion B shown in FIG. FIG. 3 is an exploded perspective view of the lighting device 1.

  As shown in these drawings, the lighting device 1 includes a chassis 2, a reflection sheet 3, a power supply unit 4, a power supply cover 5, an adapter 6, an adapter cover 7, a dust cover 8, a ring cover 9, a center cover 10, and a light source. A unit 30 is provided.

  The illuminating device 1 according to the present embodiment emits light from the light source unit 30 attached to the central portion of the chassis 2 toward the outer edge of the chassis 2 along the substantially surface direction of the reflective sheet 3, thereby reflecting the reflective sheet. The light reflected at 3 irradiates the ring cover 9, so that illumination light is emitted from the ring cover 9 as a light emitting surface to an irradiated surface such as a floor of a room.

  The chassis 2 is a member made of a metal material such as aluminum or iron for supporting each part provided in the lighting device 1, and includes a main body chassis 2 a and a bottom chassis 2 b as main body parts. The shape and material of the main body chassis 2a are not limited to the above-described configuration, and may be a resin material, ceramics, or the like as long as it has sufficient strength to support each part of the lighting device 1. However, the main body chassis 2a is preferably made of a material having high thermal conductivity in order to dissipate heat generated by the light source unit 30 described later to the outside.

  As shown in the exploded perspective view of FIG. 3, the central portion of the main body chassis 2 a has an illumination light emission direction side from the illumination device 1, that is, from the surface side that is the ring cover 9 side surface to the opposite back surface side. A main body opening 2c that penetrates is provided, and around the main body opening 2c, six light source unit support portions 20 are provided by bent portions 20a obtained by bending the inner edge of the main body chassis 2a toward the ring cover 9 side. ing. That is, the light source unit support part 20 is formed integrally with the main body chassis 2a by bending a part of the main body chassis 2a.

  Further, each light source unit support portion 20 has substantially the same shape, and the bent portion 20a is substantially perpendicular to the radiation passing through the center of the circle formed by the outer edge of the main body chassis 2a. It is provided point-symmetrically. Thereby, each light source unit support part 20 is arrange | positioned in the circumference | surroundings of the said main body opening part 2c, ie, the center part of the main body chassis 2a, so that it may form a substantially regular hexagon when it sees from a floor surface side. Moreover, the main body chassis 2a has a reflection sheet 3 described later on the surface of the ring cover 9 side, that is, the illumination light emission direction side.

  In the present embodiment, the six light source unit support portions 20 are arranged in a hexagonal shape, but the number and arrangement method of the light source unit support portions 20 are not limited to this. For example, the light source unit support portions 20 are arranged in a quadrangular shape, an octagonal shape, or other polygonal shapes, and each light source unit is supported so that a light source 32 described later is arranged circumferentially along the circumferential direction of the main body chassis 2a. It is good also as a structure provided in the part 20. FIG. A more specific description of the light source unit support 20 will be described later.

  Further, as shown in the cross-sectional view of FIG. 4, the main body chassis 2a as the main body portion of the illuminating device 1 has a surface such that the surface approaches the ring cover 9 side as the substantially annular plate-shaped member is moved to the outer peripheral side. Is provided with a stepped portion 2a3. The step 2a3 is provided over the entire circumference of the main body chassis 2a.

  More specifically, the main body chassis 2a has the inner surface 2a1 whose position in the direction orthogonal to the surface is substantially the same as the position in the orthogonal direction of the bent portion 20a as the first surface, and the orthogonal direction. The outer peripheral portion 2a2 is located on the ring cover 9 side of the inner peripheral portion 2a1 as the second surface. A stepped portion 2a3 is connected between the inner peripheral portion 2a1 which is a central region of the main body chassis 2a and the outer peripheral portion 2a2 which is a region on the outer peripheral side of the inner peripheral portion 2a1 in the main body chassis 2a. As a method for forming the inner peripheral portion 2a1, the outer peripheral portion 2a2, and the stepped portion 2a3, press working is preferably used.

  As shown in FIG. 4, in the main body chassis 2 a, the main body opening 2 c surrounded by the light source unit support portions 20 includes a power supply unit 4, a part of the power supply cover 5, an adapter 6, an adapter cover 7, and a dustproof cover 8. A part of is arranged.

  The power supply cover 5 shown in FIG. 3 includes an opening 5a having a shape corresponding to the outer diameter shape of the adapter mounting portions 6a and 6b provided at the center, and a center cover provided around the opening 5a. The power supply accommodating part 5b which is dented in the 10 side and becomes the shape which the ceiling side opened is provided, and the collar part 5c substantially parallel with respect to the ceiling surface provided in the circumference | surroundings of the power supply accommodating part 5b. Thereby, the power supply cover 5 accommodates the power supply unit 4 in the power supply accommodating part 5b, and protects the power supply unit 4. FIG. In addition, the outer peripheral part of the power supply accommodating part 5b becomes a shape which can be accommodated in the inner side of the six light source unit support parts 20, ie, the center side of the circle | round | yen which the outer edge of the main body chassis 2a makes.

  The power supply unit 4 shown in FIG. 3 receives a power supplied from the outside of the lighting device 1 and supplies it to each part of the lighting device 1 according to instructions from the user, detection results of various sensors, and the like. A circuit board such as a control circuit for controlling the light emission state of each light source is provided. Further, on the center cover 10 side of the power supply unit 4, for example, an infrared signal transmitted from a remote sensor (not shown) for instructing the lighting device 1 or an optical sensor that detects the brightness around the lighting device 1 is provided. A sensor unit 40 equipped with various sensors such as a receiving sensor is attached.

  The bottom chassis 2b shown in FIG. 3 is a substantially disk-shaped member having an opening corresponding to the outer diameter shape of the adapter 6, and the main body with the flange 5c of the power cover 5 sandwiched between the main body chassis 2a. It is attached to the chassis 2a. Thereby, the power supply unit 4 and the sensor unit 40 are accommodated in the power supply accommodating portion 5b of the power supply cover 5, and the opening surface provided on the ceiling side of the power supply accommodating portion 5b is closed by the bottom chassis 2b.

  The adapter attaching portions 6a and 6b hold the adapter 6 when attaching the lighting device 1 to an installation portion such as a ceiling or a wall surface, and play a role of hiding the edges of metal members such as the chassis 2 and the power supply cover 5. ing. The adapter 6 is a member for attaching the lighting device 1 to the ceiling and supplying power from a commercial power supply to the power supply unit 4.

  After the lighting device 1 is mounted on the ceiling, the adapter cover 7 is mounted on the floor surface side of the adapter mounting portion 6a so as to cover the adapter 6 and the opening 5a of the power supply cover 5 in which the adapter mounting portions 6a and 6b are arranged. It is done.

  The dust-proof cover 8 illuminates the reflecting portion 8a and the reflecting portion 8a that is disposed so as to face the light source unit 30 at a position on the light emission side of the light source unit 30, that is, on the side opposite to the main body chassis 2a. A transmission unit 8b that is disposed inside the apparatus 1 and transmits light emitted from the light source unit 30 and reflected by the reflection unit 8a is provided. The transmitting portion 8b is held in close contact with the power supply cover 5 and the center cover 10, thereby preventing dust and insects from entering the space where the light source unit 30 is provided. doing.

  As shown in FIG. 2, each light source unit 30 has a light source mounting surface 20 b that is a surface on the outer edge side of the main body chassis 2 a in each light source unit support portion 20 erected with respect to the surface on the irradiation direction side of the main body chassis 2 a. Are attached to each. Each light source unit 30 includes a light source substrate 31, a light source 32, and a lens 33. The optical axis direction, which is the central axis direction of the light emission direction from the light source 32, extends along the surface of the main body chassis 2a. It is attached to the light source unit support part 20 so as to face 2a2. In the present embodiment, light sources W1 to W5, C1 to C4, R1 to R3, and N1 described later are collectively referred to as a light source 32.

  That is, each light source unit 30 is attached to the light source unit support part 20 so that the optical axis direction of the light source 32 becomes a direction along the surface direction of the reflection sheet 3 which the main body chassis 2a has. The surface direction of the reflection sheet 3 means a direction substantially parallel to the surface of the reflection sheet 3 and does not necessarily have to be strictly parallel to the surface of the reflection sheet 3 and intersects the surface of the reflection sheet 3. The direction to do is also included. As described above, the light source 32 is attached to the central portion of the main body chassis 2a.

  As described above, the configuration in which the light emitted from the light source unit 30 is emitted from the central portion of the lighting device 1 toward the outer peripheral portion 2a2 can brightly illuminate the ceiling from the side of the lighting device 1. , You can make the room feel brighter.

  In addition, the arrangement position and the light emission direction of the light source unit 30 are not limited to the above directions. For example, the light source unit 30 is arranged on the outer peripheral portion of the illumination device 1 and the optical axis direction of the emitted light from the light source 32 is illuminated. You may make it face the center side of the apparatus 1. FIG. More specific description of the light source unit 30 will be described later.

The lens 33 is for refracting light emitted from the light source 32 provided on the light source substrate 31 and emitting the light in a predetermined direction. That is, the lens 33 is for controlling the light distribution of the light emitted from the light source 32. In the present embodiment, a plurality of LEDs constituting the light source 32 are arranged side by side in a direction along the surface of the main body chassis 2 a on the light source substrate 31, and the lens 33 extends along the direction in which the light sources 32 are arranged. It has a rod-like shape. The light source boards 31 including the light sources 32 are respectively attached to the light source unit support portions 20 arranged circumferentially on the main body chassis 2a, and the lenses 33 are arranged at positions facing the respective light sources 32 and attached to the light source unit support portions 20. It is done. Accordingly, the plurality of lenses 33 are provided so as to surround the light source 32 in a circumferential shape.

  The material of the lens 33 is not particularly limited. For example, a lens made of a transparent acrylic resin or polycarbonate resin can be used. Although details will be described later, the lens 33 has an optical characteristic of emitting light incident from the light source 32 mainly toward the reflection sheet 3 as a reflection surface, and more specifically, mainly the reflection sheet. 3 is a condensing lens that condenses light on the outer periphery of 3. By the lens 33, a light emitting surface having a substantially uniform illuminance distribution can be formed over substantially the entire area of the ring cover 9 by the light reflected by the reflection sheet 3.

  FIG. 4 is an explanatory view schematically showing the traveling direction of the light emitted from the light source unit 30 in the illumination device 1. As shown in this figure, the light emitted from the light source 32 is incident on a lens 33 disposed opposite to the light source 32, and most of the light is refracted by the lens 33 and attached to the reflection surface of the main body chassis 2a. 3 is emitted. The light reaching the reflection sheet 3 is reflected by the reflection sheet 3 and enters the ring cover 9, passes through the ring cover 9, and is emitted to the outside of the illumination device 1. A more specific description of the lens 33 will be described later.

  A ring cover 9 as a cover for emitting illumination light of the lighting device 1 shown in FIGS. 1 and 3 is a ring-shaped cover having a circular opening at the center, and faces the reflecting surface formed by the reflecting sheet 3. Provided. The ring cover 9 diffuses and transmits the light emitted from the light source unit 30 and reflected by the reflection sheet 3 and emits the light as illumination light to the outside of the illumination device 1. The outer shape of the ring cover 9 as viewed from the illumination light exit side shown in the front view of FIG. 1B has a shape corresponding to the outer shape of the main body chassis 2a. The part is attached to the peripheral edge of the main body chassis 2a via a gasket (not shown). Thereby, the area | region between the ring cover 9 and the main body chassis 2a is airtight from the exterior of the illuminating device 1. FIG.

  The material of the ring cover 9 is not particularly limited as long as it has light transparency. For example, a conventionally known material can be used. In the present embodiment, the ring cover 9 made of a milky white light diffusing acrylic resin is used. However, the present invention is not limited to this. For example, a polycarbonate resin or the like may be used. The cover of the present invention is not limited to a ring shape such as the ring cover 9, and may be a disk shape without the opening, or may be other shapes such as a polygonal shape, and is not particularly limited. Further, the ring cover 9 and a center cover 10 described later may be integrally formed.

  The center cover 10 includes a ring-shaped light-shielding portion 10a having a light-shielding property, and a disk portion 10b made of a disk-shaped member having a light transmitting property and a light diffusing property made of the same material as that constituting the ring cover 9. It is attached so that the opening provided in the center part of the ring cover 9 may be covered. The center cover 10 is attached in close contact with the ring cover 9, and the space inside the center cover 10 and the ring cover 9 in the lighting device 1 is airtight from the space outside the lighting device 1.

  The material of the light shielding part 10a is not particularly limited as long as it has a light shielding property. For example, a resin ring member that does not transmit light or a metal ring member such as aluminum or iron is used. Can do. In addition, a hole (not shown) for guiding light incident from the outside of the illumination device 1 to the optical sensor is provided at a position corresponding to the optical sensor provided in the sensor unit 40 in the light shielding unit 10a.

  The reflection sheet 3 as a reflection surface is a sheet-like member for reflecting light emitted from the light source unit 30. For example, PET (polyethylene terephthalate) or PP (polypropylene) is mixed with barium sulfate or titanium oxide. A material in which fine bubbles are formed in a resin, a material in which silver is vapor-deposited on a metal plate, or a material in which a paint containing titanium oxide or the like is applied to the metal plate.

  The reflection sheet 3 is attached to the entire surface of the main body chassis 2a on the ring cover 9 side so as to cover a region from the outer peripheral portion 2a2 of the main body chassis 2a to the bent portion 20a that is an end portion of the inner peripheral portion 2a1. A reflection surface that reflects the light emitted from the light source 32 and emits the light toward the ring cover 9 is formed.

  Moreover, in this embodiment, as shown in FIG. 4, the main body chassis 2a has a shape in which a step is provided on the surface of a substantially annular plate-shaped member so as to approach the ring cover 9 side toward the outer peripheral side. Have. In other words, the main body chassis 2a has the stepped portion 2a3 at a position separated from the light source 32 toward the light emitting direction of the light source 32. The stepped portion 2a3 causes the stepped portion 2a3 to be located farther from the light source 32. The outer peripheral portion 2a2 that is a region is closer to the ring cover 9 side than the inner peripheral portion 2a1 that is a region closer to the light source 32 with respect to the stepped portion 2a3. That is, the main body chassis 2a is such that the outer peripheral portion 2a2 is higher on the ring cover 9 side than the inner peripheral portion 2a1 in the direction perpendicular to the surface.

  As shown in FIG. 4, when the reflection sheet 3 is attached, the reflection sheet 3 has a gentle end portion on the light source 32 side from the outer peripheral portion 2a2 side of the main body chassis 2a to the bent portion 20a side. An inclined surface that is inclined with respect to the inner peripheral portion 2a1 in a direction inclined toward the main body chassis 2a can be formed. That is, the reflection sheet 3 is not parallel to the optical axis direction of the light source 32 substantially orthogonal to the light source mounting surface 20b on the outer peripheral part 2a2 side of the light source unit support 20 to which the light source 32 is mounted, but intersects the optical axis. Inclined in the direction. In other words, the reflecting sheet 3 is attached so as to be inclined with respect to the inner peripheral portion 2a1 in the direction in which the outer peripheral portion 3a approaches the ring cover 9. Thereby, the reflection sheet 3 is disposed so as to be inclined so that the outer peripheral portion 3 a receives light from the light source 32.

  Thereby, the light from the light source 32 can easily reach the outer peripheral portion 3a of the reflection sheet 3, and is easily condensed on the outer peripheral portion 3a that is less likely to reach the light than the inner peripheral portion 3b of the reflective sheet 3 and tends to be dark. It becomes possible. Therefore, the light reflected by the reflection sheet 3 can reach the outer peripheral portion of the ring cover 9 sufficiently, so that it is possible to form a light emitting surface that is bright and has little unevenness.

  In this embodiment, an example in which the reflection sheet 3 is used as a reflection surface by attaching the reflection sheet 3 to the main body chassis 2a in order to form the reflection surface of the lighting device will be described. However, the present invention is not limited thereto, and the main body chassis 2a itself may be formed of a light-reflective material, or may be formed by applying a paint or the like that reflects light to the main body chassis 2a. When the reflecting surface is formed by the reflecting sheet 3, the stepped portion 2a3 is formed in the main body chassis 2a in order for the reflecting sheet 3 to be a reflecting surface inclined with respect to the optical axis of the light source 32 as described above. When a light-reflective coating or the like is directly applied to form a reflective surface, a smooth inclined surface or curved surface that is closer to the ring cover 9 side toward the outer periphery without providing a stepped portion on the main body chassis 2a. The main body chassis 2a is preferably formed so as to be a surface.

  FIG. 5A is an explanatory diagram illustrating the configuration of the main body chassis 2 a and the light source unit 30. FIG. 5B is an enlarged view of a portion F shown in FIG. FIG. 5C is an explanatory diagram showing a method for attaching the light source unit 30. In FIG. 5A, the reflection sheet 3 is not shown. Hereinafter, the light source unit support 20 and the light source unit 30 will be described more specifically.

  Each light source unit support part 20 has a standing part 21 standing upright from the surface of the main body chassis 2a and a tip part 22 formed by further bending a part of the tip of the standing part 21. Yes. The standing portion 21 has a trapezoidal shape whose width becomes narrower from the main body chassis 2a side toward the distal end portion 22. Further, the distal end portion 22 has a trapezoidal shape whose width becomes narrower as the distance from the standing portion 21 increases. Accordingly, the light source unit support portions 20 adjacent to each other are notched, and each light source unit support portion 20 has a space between the other light source unit support portions 20 adjacent to each other and is independent of the main body. It stands on the inner edge of the chassis 2a. In addition, although the front-end | tip part 22 is not an essential structure, the bending strength of the light source unit support part 20 can be raised with the front-end | tip part 22. FIG.

  In this embodiment, the standing portion 21 is attached to the main body chassis 2a so that the angle formed by the surface of the standing portion 21 on the main body chassis 2a side and the surface of the main body chassis 2a on the standing portion 21 side is smaller than 90 degrees. It is bent against. Thereby, since the optical axis of the light source can be directed to the reflection sheet 3 side of the main body chassis 2a, incident light directly incident on the ring cover 9 without passing through the reflection surface can be reduced, and the light emission of the ring cover 9 can be reduced. It is possible to suppress the occurrence of uneven brightness on the surface. However, the inclination angle of the standing portion 21 with respect to the main body chassis 2a is not limited to this, and may be appropriately changed according to the shape of each portion, required optical characteristics, and the like.

  Moreover, in this embodiment, although the light source unit support part 20 is formed by bending the inner edge part of the main body chassis 2a, it is not restricted to this. For example, the light source unit support part 20 may be provided separately from the main body chassis 2a and attached to the main body chassis 2a. The light source unit support part 20 is formed by standing the inner edge of the main body chassis 2a by drawing or the like. Alternatively, the light source unit support portion 20 may be formed by molding or cutting.

  As shown in FIGS. 5B and 5C, the light source unit 30 includes a rectangular light source substrate 31 having a shape extending in one direction and a long lens 33, and the lens 33 is a light source. The light source substrate 31 is held by the light source unit support portion 20 by being mounted on the standing portion 21 of the light source unit support portion 20 with the light source substrate 31 sandwiched between the unit support portion 20 and the unit support portion 20.

  FIG. 6 is an explanatory view showing the configuration of the lens 33, a top view seen from the ring cover 9 side, a front view seen from the light emitting direction side of the light source 32, a bottom view seen from the chassis 2a side, and the lens 33. The side view seen from the longitudinal direction, the HH cross section shown in the said front view, and the cross section of II cross section are included.

  As shown in each of these drawings, the lens 33 includes two locking portions 54 and 54 provided at positions corresponding to the two through holes 23 and 23 in the light source unit support portion 20, and the main body chassis 2a on the ceiling side surface. Locking portions 58, 58 provided at positions corresponding to the through holes 2d, 2d, and protrusions 59 provided at positions corresponding to the through holes 24, 24 of the standing portion 21 on the surface facing the light source substrate 31.・ 59. Further, through holes 60 and 60 are provided at positions corresponding to the through holes 24 and 24 in the light source substrate 31. The locking portions 54 and 54 also function as a light guide portion included in the lens 33 as described later.

  Each locking portion 54 is a portion along the longitudinal direction of the total reflection surface 33d on the surface of the lens 33 opposite to the main body chassis 2a, in other words, the total reflection surface 33d which is the surface of the lens 33 on the ring cover 9 side. Provided. Further, a root portion 51 formed so as to protrude from the main body of the lens 33 to the floor side, an extending portion 52 formed so as to protrude from the root portion 51 to the light source unit support portion 20 side, and a tip of the extending portion 52 And a claw portion 53 formed so as to protrude from the ceiling side.

  Each of the locking portions 58 has a root portion 55 formed so as to protrude from the main body of the lens 33 to the ceiling side, and extends from the end portion of the root portion 55 on the light source substrate 31 side to the side opposite to the light source substrate 31. And a claw portion 57 formed on the surface of the extending portion 56 on the ceiling side. The claw portion 57 forms an acute angle with respect to the inclined surface 57a between the inclined surface 57a inclined to the ceiling side as it is farther from the light source substrate 31, and the end of the inclined surface 57a far from the light source substrate 31 and the extending portion 56. And a locking surface 57b formed to be formed.

  Each protrusion 59 is formed so as to protrude from the root portion 51 of each locking portion 54 to the light source substrate 31 side. In a state where the claw portion 53 of the locking portion 54 is locked to the upper end of the standing portion 21, the protrusions 59 and 59 are in the through holes 60 and 60 of the light source substrate 31 and the through holes 24 and 24 of the light source unit support portion 20. The locking surfaces 57b and 57b of the locking portions 58 and 58 are inserted in a state where the extended portions 56 and 56 of the locking portions 58 and 58 provided on the main body chassis 2a side of the lens 33 are bent in the vertical direction. The lens 33 and the light source substrate 31 are supported by the light source unit support portion 20 by being caught in the through holes 2d and 2d of the main body chassis 2a. The light source substrate 31 is held in a state of being pressed against the light source unit support portion 20 by the root portion 51 of the locking portion 54 and the root portion 55 of the locking portion 58.

  Further, in the present embodiment, by providing the locking portions 54 and 54 on the floor side surface of the lens 33, a part of the light incident on the lens 33 is guided and emitted from the locking portions 54 and 54. , Leading to the central area of the lighting device 1. That is, the locking portions 54 and 54 have a function as a light guide portion for guiding the light incident on the lens 33 to the central region.

  More specifically, the light emitted from the locking portions 54 and 54 is reflected and diffused toward the central side of the lighting device 1 by the reflecting portion 8a of the dustproof cover 8, and is supported by each light source unit via the transmitting portion 8b. The light enters the region inside the portion 20. Then, the light incident on the area inside each light source unit support portion 20 is reflected and diffused by the power source cover 5 and the adapter cover 7, and is emitted to the outside of the illumination device 1 via the disc portion 10 b of the center cover 10. Is done. Thereby, the center cover 10 provided to face the region on the center side can be irradiated to cause the center cover 10 to emit light.

  In the present embodiment, the light source unit 30 is attached to the light source unit support 20 formed integrally with the main body chassis 2a. However, the present invention is not limited to this, and the light source unit 30 may be attached to a member different from the main body chassis 2a. Good. Further, the lens 33 is attached to the light source unit support portion 20 by the locking portion 54 and the locking portion 58, and the light source substrate 31 is sandwiched between the lens 33 and the standing portion 21. The attachment method is not limited to this, and attachment may be performed using attachment members such as screws and rivets.

  7 is a plan view of the light source substrate 31. As shown in FIG. 7, the light source substrate 31 includes a light source 32, an electric resistance R, and connection terminals WW−, WW +, CW−, CW +, Red−, Red +, 2 One Night- and two Night +. The light source 32 includes light sources W1 to W6, C1 to C5, R1 to R3, and N1 that are a plurality of types of light emitting elements having different colors. The light sources W1 to W6 are light bulb color LEDs, the light sources C1 to C5 are daylight color LEDs, and the light sources R1 to R3 are red LEDs. The light source N1 is a light bulb color LED used as a night light. In addition, the light emitting element which comprises the light source 32 is not restricted to LED, Other light emitting elements, such as EL (Electro Luminescence), may be sufficient.

  The light sources W1 to W6, C1 to C5, and N1 are LEDs that emit pseudo white light by combining blue light from a blue LED and excitation light from a phosphor, and the light sources R1 to R3 emit red light as monochromatic light. LED. The light source N1 for nightlight is provided only in two of the six light source substrates 31, and the hexagonal opposite sides when mounted on the light source unit support portion 20 arranged in a hexagonal shape. It is supposed to be arranged in. In the present embodiment, the bulb-color and daylight LEDs are exemplified as the light-emitting elements that emit pseudo white light. However, the present invention is not limited thereto, and other light-emitting elements that emit pseudo white light such as day-white light-emitting elements may be used. Good. The light emitting element that emits monochromatic light is not limited to the red LED, and other light emitting elements that emit monochromatic light such as green and blue may be used.

  As shown in FIG. 7, in each light source substrate 31, a plurality of types of LEDs constituting the light source 32 are W1, C1, R1, W2, C2, W3, C3, R2, N1, W4, C4 from the left in the longitudinal direction. , W5, R3, C5, W6. In the present embodiment, by controlling the light emission state of the light sources of the respective colors, the ring cover 9 is daylight colored by the colors of the light sources C1 to C5, the light bulb color by the light colors of the light sources W1 to W6, the light sources C1 to C5 and / or the light sources. By mixing the colors of W1 to W6 and the light sources R1 to R3, it is possible to emit light in an orange pink color and an intermediate color by changing the ratio of the dimming rates of the plurality of light sources.

  In the present embodiment, the number of LEDs as the light sources 32 mounted on each light source substrate 31 is 15 in total, for example, 6 daylight colors, 5 light bulb colors, 3 red colors, and 1 light bulb color for night lights. However, the number of LEDs is not limited to this. Further, the arrangement position of each LED and the color of the emitted light of each LED are not limited to the above-described configuration, and may be appropriately changed according to the size and shape of each part of the illumination device 1 and required optical characteristics. Good.

  As shown in FIG. 6, the lens 33 includes light incident surfaces 33 a to 33 c that are arranged to face the light source 32, and a total reflection surface 33 d that totally reflects light incident on the lens 33 from the light incident surfaces 33 a to 33 c. It is what is called a condensing lens provided with 33e and the light-projection surfaces 33f-33h.

  The light incident surfaces 33a to 33c have a curved shape that is convex toward the light source 32 side. The light incident surface 33a is located on the reflective sheet 3 side in a direction substantially perpendicular to the main body chassis 2a, and the light incident surface 33c is located on the ring cover 9 side in a direction substantially perpendicular to the main body chassis 2a. In the embodiment, the light source W1 to W5, C1 to C4, R1 to R3, N1 is the main body chassis of the lens 33 in the light incident surface 33b located in the center of the light incident surfaces 33a to 33c in the direction perpendicular to the main body chassis 2a. It arrange | positions in the position facing the substantially center part of the direction perpendicular | vertical to 2a.

  The total reflection surfaces 33 d and 33 e have curved surfaces that are convex toward the outside of the lens 33. The total reflection surface 33d as the second total reflection surface located on the ring cover 9 side in the direction perpendicular to the main body chassis 2a and the total reflection surface as the first total reflection surface located on the main body chassis 2a side, that is, the reflection sheet 3 side. The reflection surface 33 e has an asymmetric shape with respect to a straight line perpendicular to the substrate surface of the light source substrate 31. Specifically, the total reflection surface 33d and the total reflection surface 33e have an angle formed by a tangent to the curved surface formed by each of the reflection surfaces and a straight line perpendicular to the substrate surface, and the total reflection surface 33d has a total reflection surface 33e. Is smaller than

  As shown in the HH sectional view of FIG. 6, the light emitting surface of the lens 33 is viewed from the side close to the reflection sheet 3) in a direction substantially perpendicular to the main body chassis 2 a in a cross-sectional view perpendicular to the longitudinal direction of the lens 33. The description will be made by dividing into three regions consisting of the light emitting surfaces 33h, 33g, and 33f. The light emitting surface 33 f on the reflection sheet 3 side and the light emitting surface 33 h on the ring cover 9 side have a curved surface shape that is concave inside the lens 33. Further, the light emitting surface 33 g located at the center in the direction substantially perpendicular to the main body chassis 2 a has a curved surface shape that is convex outward of the lens 33. The connecting portion between the light emitting surface 33f and the light emitting surface 33g and the connecting portion between the light emitting surface 33g and the light emitting surface 33h are smooth curved surfaces whose curvatures are continuously changed in the cross-sectional view. In addition, the light emission surface in the present invention is not limited to the above shape, and may be, for example, a curved surface shape in which the light emission surface is convex outward of the lens 33 in the cross-sectional view.

  Further, as shown in FIG. 6, in the light incident surfaces 33 a to 33 c of the lens 33, the region excluding the region facing the light source N <b> 1 for the nightlight has a band shape along the direction perpendicular to the longitudinal direction of the lens 33. A large number of provided uneven portions 33 i are provided. The uneven portion 33 i allows light from the light source 32 to be diffused and incident in the longitudinal direction of the lens 33 when entering the lens 33, thereby mixing the color of the light source 32 inside the lens 33. Thereby, the color nonuniformity resulting from the distance between each light source being separated can be reduced. In addition, the uneven | corrugated | grooved part 33i may be provided over the whole longitudinal direction of the light-incidence surface, and does not need to be provided in the light-incidence surface.

  With the above configuration, the light incident on the light incident surface 33a from the light source 32 is refracted by the light incident surface 33a, and part of the light is totally reflected by the total reflection surface 33d, and then enters the light exit surface 33h, and the remaining light The light is directly incident on the light exit surface 33f. Further, the light incident on the light incident surface 33b from the light source 32 is refracted by the light incident surface 33b and enters the light emitting surface 33g. In addition, the light incident on the light incident surface 33c from the light source 32 is refracted by the light incident surface 33c, partially reflected by the total reflection surface 33e, and then incident on the light exit surface 33h, and the remaining light is direct light. Incident on the exit surface 33h.

  Then, these lights incident on the light emitting surfaces 33f to 33h are refracted at each light emitting surface, emitted from the lens 33 toward the reflecting sheet 3, and reflected by the reflecting sheet 3, as shown in FIG. Incident on the ring cover 9. More specifically, the lens 33 is a distance from the lens 33 in the radial direction in a substantially half area on the reflection sheet 3 side, which is a textured area to be described later, of the light exit surfaces 33f to 33h. The light is emitted to a region on the inner peripheral side of the reflection sheet 3 that is close to, and a substantially half region on the ring cover 9 side that is the emission direction side of the illumination light is a distance of the reflection sheet 3 that is radially away from the lens 33. It is designed to emit light to the outer peripheral region. As a result, a light emitting surface with substantially uniform luminance can be formed over substantially the entire area of the ring cover 9.

  As shown in the hatched part of the front view of FIG. 6 and the part represented by the arrow in the side view, a substantially half region on the reflecting sheet 3 side of the light emitting surface in the direction substantially perpendicular to the main body chassis 2a, In other words, a substantially half region of the light exit surface 33g on the reflection sheet 3 side and the entire surface of the light exit surface 33h are a first light scattering portion that scatters or diffuses the light incident from the light incident surfaces 33a to 33c. Texture processing 33k1 is applied.

  The embossing 33k1 forms on the surface of the mold for molding the lens 33 a surface roughened in advance in an embossed shape at a position corresponding to a substantially half region on the reflection sheet 3 side of the light emitting surface of the lens 33 described above. It can be applied to the light exit surface together with the molding of the lens 33. Further, the light scattering portion can also be formed by subjecting the above-mentioned portion of the light emitting surface of the lens 33 after molding to blasting, etching, or roughening the surface with sandpaper. .

  In addition, in the front view and the side view of the lens 33, a substantially half region on the ring cover 9 side of the light emitting surface in a direction substantially perpendicular to the main body chassis 2a, that is, a substantially half region on the ring cover 9 side of the light emitting surface 33g The entire surface of the light emitting surface 33f is not provided with a light scattering portion by the above-described embossing or the like, or the surface of the light emitting surface is smoother than the light scattering portion. Further, the area to which the embossing 33k1 is applied is not limited to the above location, but may be performed only on the entire surface of the light emitting surface 33h or only on a part of the light emitting surface 33h.

  When the light from the light sources W1 to W5 and C1 to C4 that emit pseudo white light is emitted by controlling the light distribution by the lens 33 as in the lighting device 1 of the present invention, the light incident surface and the light emitting surface of the lens 33 are emitted. Is not exactly parallel, the lens 33 acts as a prism, and the emitted light is emitted after being split into blue light and yellow light having different refractive indexes, and the light color of the reflecting sheet 3 is different in light color. As a result of the distribution, color unevenness may occur in the ring cover 9 as the light emitting surface.

  Furthermore, since the light sources R1 to R3 that emit red light are light sources that emit monochromatic light, they are colored in comparison with other light sources W1 to W5 and C1 to C4 that emit a mixture of light of a plurality of colors in advance. Are less likely to mix uniformly, and the number of light sources provided is smaller than that of light sources of other colors, making it difficult to mix with light of other colors. Furthermore, the distance between the LEDs constituting the light source 32 on the light source substrate 31 is long, and the light sources W1 to W5 and C1 to C4 that emit pseudo white light are blue light and the amount of excitation light from the phosphor. There is a possibility that color unevenness in the ring cover 9 may occur due to the difference in the ratio of the number of light depending on the light emission angle.

  The color unevenness in the ring cover 9 due to the various causes described above is that the distance from the lens 33 is closer to the radial direction than the region on the outer peripheral side of the reflection sheet 3 where the distance from the lens 33 is radially separated, that is, the reflection. This appears significantly due to the light incident on the inner peripheral region of the sheet 3. This is because the region on the outer peripheral side of the reflection sheet 3 is relatively far from the light source 32, so that light of a plurality of types of light colors is likely to enter the reflection sheet 3 in a well-mixed state, whereas the lens 33 This is because the area on the inner peripheral side where the distance from the light source is short is short because the light from the light source 32 is mixed in different colors.

  In the present invention, the texture 33k1 as the light scattering portion is applied to the area on the reflection sheet 3 side of the light emission surface in the direction perpendicular to the main body chassis 2a, so that light is emitted to the area on the inner peripheral side of the reflection sheet 3. Light from the light emitting surfaces 33h and 33g can be scattered and emitted. As a result, the light from each of the light sources W1 to W5, C1 to C4, and R1 to R3 is mixed and incident on the inner peripheral region of the reflection sheet 3, and the ring cover 9 is caused to emit light with light that is substantially uniformly mixed. And color unevenness on the light emitting surface can be reduced. That is, the ring cover 9 is formed with a light color such as warm white, white, or daylight white that is a mixture of daylight color and light bulb color, or a light color such as orange pink that is a mixture of red and daylight color or light bulb color. A light emitting surface with little color unevenness can be formed.

  In addition, as described above, the embossing 33k1 is intentionally performed partially on the half area on the reflecting sheet 3 side rather than on the entire surface of the light emitting surface, that is, by embossing only the area on the reflecting sheet 3 side. In addition, it is possible to suppress a decrease in the light extraction light rate due to a decrease in the light transmittance of the lens 33 in the texture processing 33k1.

  Further, when the graining 33k1 is formed on the entire surface of the light emitting surface, the light emitting surface 33g and the light emitting surface 33f are substantially half of the light emitting surface 33g on the ring cover 9 side due to the reduction in light transmittance and the light diffusing action. Since the amount of light emitted from the light to the outer peripheral side region of the reflection sheet 3 is reduced, the outer peripheral region may become dark and the light emitting surface may have a non-uniform brightness as a whole. The surface of the surface on the ring cover 9 side is not textured, so that light emitted from the region is condensed on the outer peripheral side of the reflection sheet 3 without diffusing, and a sufficient amount of light is reflected on the reflection sheet 3. It is possible to reach the region on the outer peripheral side, and it is possible to suppress uneven brightness on the light emitting surface. In particular, since the area on the outer peripheral side of the reflection sheet 3 is far from the light source 32, the light is difficult to reach and the luminance tends to decrease. Therefore, in the area that emits light toward the outer peripheral area on the light output surface, It is preferable not to form the light scattering portion.

  In the present embodiment, an example has been described in which the embossing 33k1 as the first light scattering portion is provided in a half region on the reflection sheet 3 side of the light emitting surface of the lens 33. You may give the light-scattering part, such as embossing, to the area | region on the cover 9 side. That is, the 1st light-scattering part should just be provided in the area | region of at least 1 part of the light-projection surface. However, when the first light scattering portion is provided in the region on the ring cover 9 side, the light scattering portion is provided in a region having an area smaller than the half region on the reflection sheet 3 side, or the first light scattering portion provided on the reflection sheet 3 side. It is preferable to apply a light scattering portion with a low degree of light scattering and a high transmittance than the textured processing 33k1 as one light scattering portion.

  In addition, by forming a light scattering portion such as a textured surface on the light exit surface instead of the light entrance surfaces 33a and 33b of the lens 33, the light incident from the light entrance surface is not emitted from the lens 33, but a plurality of times inside. The reflected light can be emitted from the light scattering portion, and the light extraction efficiency can be improved. In addition, since the light reflected a plurality of times inside the lens 33 is mixed in the lens 33, the color unevenness of the light emitting surface can be further suppressed by emitting the light.

(Second Embodiment)
Next, a second embodiment according to the present invention will be described based on a perspective view of the lens 33 shown in FIG. 8 viewed from the incident surface side. In addition, about the structure same as 1st Embodiment, the same code | symbol is attached | subjected and the detailed description is abbreviate | omitted.

  As shown in FIG. 8, the end surfaces 33m on both sides in the longitudinal direction of the lens 33 are not parallel to each other, and have a planar shape in which the width in the longitudinal direction of the lens 33 becomes wider from the light incident surface side toward the light emitting surface side. ing. Thereby, when each lens 33 is attached to the light source unit support part 20, as shown to Fig.5 (a), the end surfaces 33m of the adjacent lens 33 are arrange | positioned substantially parallel.

  Therefore, the light emitted from the region in the vicinity of the edge portion 33j between the end surface 33m of the lens 33 and the total reflection surface 33d is emitted from the adjacent lens 33 and overlapped in parallel to form a streak-like bright line. 9 is not preferable in appearance. In order to suppress this, embossing 33k2 as a second light scattering portion is applied to a partial region at both ends of the total reflection surface 33d including the edge portion 33j. That is, the embossing 33k2 is provided at both ends of the total reflection surface 33d, which is the surface of the lens 33 on the ring cover 9 side. The embossing 33k2 on both ends of the total reflection surface 33d is formed by the same method as the embossing 33k1 on the light emitting surface according to the first embodiment. Further, the light scattering portions at both ends of the total reflection surface 33d are not limited to the texture processing, and other processing for scattering the emitted light, such as etching and blast processing, can be applied.

  This is because the embossing 33k2 on both ends of the total reflection surface 33d diffuses the light emitted from the vicinity of the edge portion 33j of the adjacent lens 33, and the end surfaces 33m of the adjacent lenses 33 are arranged substantially in parallel. Thus, the bright lines projected on the ring cover 9 can be suppressed. The bright line can be shielded from being seen by the light shielding part 10a of the center cover 10, but the bright line can be used without using the light shielding part 10a due to the graining 33k2 formed at the end of the total reflection surface 33d. It is possible to prevent the luminance of the light emitting surface from being lowered more than necessary due to the light shielding of the light shielding portion 10a.

  In the present embodiment, an example in which the texture processing 33k2 as the second light scattering portion is provided in a partial region of both end portions of the total reflection surface 33d has been described. However, in the present invention, the second light scattering is provided. The portion may be provided on at least a part of the total reflection surface 33d, that is, at least a part of the surface of the lens 33 on the ring cover 9 side. There is a slight amount of leakage light emitted from the surface of the lens 33 on the ring cover 9 side toward the ring cover 9, which may cause uneven brightness on the light emitting surface. This can be prevented by applying the second light scattering portion to the entire surface.

  The first light scattering unit according to the first embodiment of the present invention and the second light scattering unit according to the second embodiment described above can be applied to a single lens or a lighting device, respectively. It is also possible to use it by applying it to the same lens or lighting device.

DESCRIPTION OF SYMBOLS 1 Illuminating device 2 Chassis 2a Main body chassis 3 Reflective sheet 9 Ring cover 30 Light source unit 32 Light source 33 Lens 33a-33c Light incident surface 33d Total reflection surface 33e Total reflection surface 33f-33h Light emission surface 33j Edge part 33k1 Texture processing 33k2 Texture processing N1 Light source for nightlight W1 to W6 Light source C1 to C5 Light source R1 to R4 Light source

Claims (6)

A main body having a reflecting surface for reflecting light;
A light source having a plurality of light emitting elements of different colors;
A lens that emits light from the light source toward the reflecting surface;
A lighting device comprising a cover that transmits light reflected by the reflecting surface,
The illumination device according to claim 1, wherein the lens has a first light scattering portion formed in at least a partial region of the light exit surface.   The lighting device according to claim 1, wherein the first light scattering portion of the lens is formed in a region on the reflection surface side of the light emission surface. The lighting device according to claim 1, wherein the lens is provided so as to surround the light source in a circumferential shape.   The lighting device according to claim 1, wherein the lens has a second light scattering portion formed on a surface on the cover side.   The illumination device according to claim 4, wherein the lens is formed of a plurality of rod-shaped lenses.   The lighting device according to claim 5, wherein the rod-shaped lens has the second light scattering portion formed at both ends in the longitudinal direction.