JP2013187146A - Lighting device and building equipped with the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a lighting device capable of irradiating uniform and consistent light to two irradiation surfaces and having high spatial color rendering properties, and a building equipped with the lighting device.SOLUTION: A lighting device, which forms a first irradiation surface on a surface parallel with an optical axis and forms a second irradiation surface on a surface orthogonal to the optical axis, is provided with a substrate arranged in parallel with a surface orthogonal to the optical axis, a plurality of light emitting elements arranged and dispersed on the substrate, first optical members arranged, in a light emission direction of the light emitting elements, each against a part of the plurality of the light emitting elements, and second optical members which are arranged, in the light emission direction of the light emitting elements, against the rest of the plurality of the light emitting elements and converge more weakly light emitted from the light emitting elements as compared with the first optical member, and diffuse the light emitted from the light emitting elements. The first optical members are arranged at least at the light emitting elements arranged at both outermost ends on the substrate in a direction parallel with the first irradiation surface.

Description

  The present invention relates to a lighting device including a plurality of light emitting elements such as LEDs (Light Emitting Diodes), and a building provided with the lighting device. The color names in the present invention and the present specification are based on the color names of chromaticity defined by JIS Z 8110: 1995 “Color Display Method—Color Name of Light Source Color”.

  Conventionally, as general lighting devices, lighting devices such as downlights, universal downlights, and spotlights having a plurality of light emitting elements such as LEDs have been widely used, and many improvements have been made. As an improvement example of such a lighting device, for example, a downlight described in Patent Document 1 and a spotlight described in Patent Document 2 have been proposed.

  For example, the downlight described in Patent Document 1 can extend the insulation distance between the mounting substrate and the frame without hindering the compactness of the lighting fixture. In addition, in the spotlight described in Patent Document 2, for example, light that has reached the reflecting surface of the lens from the LED is reflected from the optical axis by a conical lens installed at a position facing the light emitting surface of the LED. It is comprised so that it may reflect in the direction which leaves | separates. With such a configuration, in the spotlight, the light reflected by the reflecting surface is less directed toward the exit recess disposed at the center of the lens, so the exit recess diameter can be increased. It becomes possible.

JP 2011-228128 A JP 2011-187165 A

  For example, when a downlight that can irradiate the floor with uniform light as in the past is placed near the wall, the light emitted from the downlight is not only applied to the floor but is also mounted on the downlight. Since the LED having high directivity has a high directivity, the light emitted from the downlight is also applied to the wall surface.

  However, in a downlight that can irradiate the floor with uniform light as in the past, in consideration of irradiating the floor only with uniform light, lenses such as optical members provided corresponding to the LEDs Since the optical characteristics and the lens arrangement have been determined, the wall surface, which is a surface different from the floor surface, is not irradiated with uniform light, and the wall surface, which is the irradiation surface, has, for example, scaly unevenness (light / dark unevenness). There are problems that arise.

  In addition, the problem is not limited to the downlight, but also occurs in a general lighting device such as a universal downlight or a spotlight that emits uniform light in one desired direction.

  The present invention has been made in view of such a problem, and an object of the present invention is to illuminate the two irradiation surfaces with uniform light without unevenness and to have high spatial color rendering. The object is to provide a device and a building provided with the lighting device.

  In order to achieve the above object, the illumination device of the present invention forms a first irradiation surface on a plane parallel to the optical axis, and forms a second irradiation surface on a plane orthogonal to the optical axis. A lighting device that is arranged in parallel to a plane orthogonal to the optical axis, a plurality of light emitting elements distributed on the substrate, and a light emitting direction of the light emitting elements A first optical member provided for each of a part of the plurality of light emitting elements, and a light emitting direction of the light emitting element, provided for each of the remaining portions of the plurality of light emitting elements, A second optical member that collects light emitted from the element weakly as compared with the first optical member or diffuses light emitted from the light emitting element, and the first optical member includes the first optical member, Arranged at the outermost ends in the direction parallel to the first irradiation surface on the substrate. , Characterized in that it is at least provided for the light emitting element.

  In the illuminating device described above, it is preferable that the second optical member is provided with respect to the light emitting element disposed closest to the first irradiation surface.

  In any one of the illumination devices described above, each of the first optical member and the second optical member is provided asymmetrically across a first axis that is orthogonal to the optical axis and parallel to the first irradiation surface. Preferably it is.

  In any one of the illumination devices described above, it is preferable that a large number of the second optical members are provided in a region on the side away from the first irradiation surface when partitioned by the first axis.

  In any one of the lighting devices described above, the light emitting elements may be arranged concentrically at the center and the outer periphery on the substrate.

  In the illumination device in which the light emitting element is arranged concentrically at the center and the outer periphery of the substrate, the second optical member is the light emitting element arranged concentrically at the center of the substrate. And the first optical member is provided for each of the light emitting elements disposed in a region away from the first irradiation surface when partitioned by the first axis. It is preferable that each of the remaining portions of the light emitting elements arranged concentrically at the center of the substrate is provided.

  In the above-described illumination device, the second optical member is a part of the light emitting element arranged concentrically on the outer periphery of the substrate, and is parallel to the first irradiation surface on the substrate. It is preferable to be provided for the light-emitting elements other than the light-emitting elements arranged at the outermost ends in any direction.

  In any one of the illumination devices described above, the first optical member and the second optical member may be provided symmetrically with respect to the optical axis and a second axis perpendicular to the first irradiation surface. preferable.

  In any one of the lighting devices described above, the first irradiation surface may be formed on a wall and the second irradiation surface may be formed on a floor. In this case, the lighting device has an attachment direction in which the wall and a line segment connecting the light emitting elements arranged at outermost ends in a direction parallel to the first irradiation surface on the substrate are parallel to each other. You may further have the mark to show.

  In any one of the illumination devices described above, it is preferable that the first optical member is a narrow-angle lens or a medium-angle lens, and the second optical member is a wide-angle lens. In this case, it is more preferable that the ½ beam angle of the first optical member is less than 30 °, and the ½ beam angle of the second optical member is 30 ° or more.

  In any one of the illumination devices described above, the optical axes of the light emitting elements may be parallel.

  In order to achieve the above object, the building of the present invention is characterized in that any of the above-described lighting devices is attached to the ceiling near the wall surface of the building.

  With the above-described configuration, the lighting device according to the present invention can irradiate the two irradiation surfaces with uniform light without unevenness, and can perform higher spatial effects.

  Specifically, the first optical member provided for the light emitting elements disposed at the outermost ends in the direction parallel to the first irradiation surface includes the second optical member provided for the other light emitting elements. In comparison, since the light emitted from the light emitting element is strongly condensed, the emitted light from the first optical members arranged at the outermost ends considered to have a great influence on the formation of the first irradiation surface is 1 It becomes difficult to reach the irradiation surface. As a result, the first irradiation surface is irradiated with uniform light without unevenness, and light and dark unevenness hardly occurs on the first irradiation surface.

  In addition, when the second optical member is provided for the light emitting element disposed closest to the surface on which the first irradiation surface is formed, emitted light from the second optical member is emitted from the first irradiation surface. Therefore, the first irradiation surface can be easily formed with little brightness unevenness.

  Furthermore, when divided by the first axis, a large number of second optical members are arranged in a region away from the first irradiation surface, so that light emitted from the second optical member can be separated from the first irradiation surface. Since the first irradiation surface is uniformly and uniformly irradiated on the first irradiation surface, uniform light without unevenness is irradiated on the first irradiation surface, and the occurrence of uneven brightness on the first irradiation surface is further reduced. Is done.

  In the illumination device according to the present invention, the wall and the mark indicating the mounting direction in which the line segments connecting the light emitting elements arranged at the outermost ends in the direction parallel to the first irradiation surface on the substrate are parallel to each other. Therefore, when attaching the lighting device to the ceiling of a building or the like, it is possible to reliably perform the mounting direction of the lighting device without making a mistake, and the effects relating to the above-described lighting device can be easily and reliably brought about. Is possible.

It is a perspective view which shows the outline of the downlight which concerns on an Example. It is a side view of the downlight which concerns on an Example. It is a front view of the downlight which concerns on an Example. It is a front view of the LED module which comprises the downlight which concerns on an Example. FIG. 5 is a cross-sectional view of the LED module taken along line VV in FIG. 4. It is an exploded view of the LED module which comprises the downlight which concerns on an Example. It is a front view of the lens holder of the LED module which comprises the downlight which concerns on an Example. FIG. 8 is a cross-sectional view of the lens holder taken along line VIII-VIII in FIG. 7. It is a front view of the 1st lens of the LED module which comprises the downlight which concerns on an Example. It is a side view of the 1st lens of the LED module which comprises the downlight which concerns on an Example. FIG. 10 is a sectional view of the first lens taken along line XI-XI in FIG. 9. It is an electrical circuit diagram of the LED module which comprises the downlight which concerns on an Example. It is a perspective view of the state where the downlight concerning an example was attached. It is a top view of the state which attached the downlight which concerns on an Example. It is a top view of the LED module which concerns on the modification 1 shown similarly to FIG. It is a top view of the LED module which concerns on the modification 2 shown similarly to FIG. It is a top view of the LED module which concerns on the modification 3 shown like FIG. FIG. 18 is a cross-sectional view taken along line XVIII-XVIII in FIG.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings based on examples and modifications. In addition, this invention is not limited to the content demonstrated below, In the range which does not change the summary, it can change arbitrarily and can implement. In addition, the drawings used for explaining the embodiments and the respective modifications schematically show the lighting device according to the present invention, and are partially emphasized, enlarged, reduced, or omitted to deepen the understanding. In some cases, it does not accurately represent the scale or shape of each component. Furthermore, the various numerical values and quantities used in the embodiments and the modifications are only examples, and can be variously changed as necessary.

<Example>
(Configuration of lighting device)
FIG. 1 is a perspective view schematically showing a downlight 1 as a lighting device according to the present invention, FIG. 2 is a side view of the downlight 1 as a lighting device according to the present invention, and FIG. It is a front view of the downlight 1 as such an illuminating device. As illustrated in FIGS. 1 to 3, the downlight 1 includes an LED (Light Emitting Diode) module 2 and a main body 3 that holds the LED module 2.

  The main body 3 of the downlight 1 has a housing 5 having an opening 4 in which the LED module 2 is accommodated, an outer frame 6 provided along the outer edge of the opening 4, and the housing 5 fixed to an installation location such as a ceiling. It is comprised from the three fixing members 7 for doing. The housing 5 is made of a metal or plastic member, and has strength according to the usage environment and usage of the downlight 1. As can be seen from FIGS. 1 and 3, the planar shape of the opening 4 of the housing 5 is a circular shape, and the overall shape is a cylindrical shape. Moreover, the outer frame 6 is comprised from the ring-shaped frame member, The material is a metal or a plastic member, and has the intensity | strength according to the use environment and use application of the downlight 1. FIG. As shown in FIGS. 1 and 2, the fixing member 7 is formed of an elastic body such as a spring that extends outward from a joint portion between the housing 5 and the outer frame 6 and has a bent shape. Yes. With such a structure of the fixing member 7, when the downlight 1 is attached to an installation location such as a ceiling, the fixing member 7 is fitted into an opening provided in the installation location, and the downlight 1 is fixed to the installation location. Will be.

  The appearance structure of the downlight 1 is not limited to the shape shown in FIGS. 1 to 3, and a generally known downlight shape may be adopted. That is, as long as the main body can store and hold the LED module 2, the structure is not limited to the structure described above, and the structure can be appropriately selected according to the use environment and use application of the downlight 1. it can.

(LED module)
Next, the structure of the LED module 2 will be described in detail with reference to FIGS. FIG. 4 is a front view of the LED module 2 constituting the downlight 1 of this embodiment. FIG. 5 is a cross-sectional view of the LED module 2 taken along line VV in FIG. Further, FIG. 6 is an exploded view of the LED module 2.

  As shown in FIGS. 5 and 6, the LED module 2 includes a light emitter portion 13 having 16 LEDs 12 provided on a substrate 11, and six first lenses 15 and ten first lenses on a lens holder 14. It has a structure in which an optical body portion 17 provided with two lenses 16 is joined by a joining member (not shown) such as a screw. Note that the first lens 15 and the second lens 16 are collectively referred to simply as a lens or an optical member.

  As shown in FIGS. 4 and 6, in the light emitter portion 13, six LEDs 12 are concentrically arranged on the central portion of the substrate 11, and the ten LEDs 12 are concentrically arranged so as to surround these LEDs 12. Has been placed. That is, six LEDs 12 are arranged in the center portion of the substrate 11, and ten LEDs 12 are arranged in the outer peripheral portion of the substrate 11. In other words, the LEDs 12 are scattered and arranged on the substrate 11 from the center on the surface of the substrate 11 toward the outer edge, that is, the LEDs 12 are distributed. An external connection terminal 18 is provided on the substrate 11, and power wiring for supplying power to the LED 12 is connected to the external connection terminal 18. The LED 12 is connected to the external connection terminal 18 by a wiring (not shown) patterned on the substrate 11. The connection relationship of the LEDs 12 will be described later with reference to an electric circuit diagram. In addition, the power wiring is drawn out of the downlight 1 from a drawer opening (not shown in FIGS. 1 to 3) provided in the housing 5 and connected to a desired external power source or the like. .

  As the substrate 11, for example, an aluminum substrate formed by sequentially laminating an aluminum material, an insulating layer, and a copper foil, or other metal substrate can be used. In particular, the aluminum substrate is excellent in thermal conductivity, heat resistance, workability, and voltage resistance, and contributes to improving the light emission characteristics and reliability of the LED module 2. The substrate 11 is not limited to the metal substrate as described above, and an insulating substrate such as a glass substrate may be used. In this case, it is preferable to form a reflective layer on the glass substrate so that light emitted from each LED does not pass through the glass substrate.

  In this embodiment, the LED 12 is a light emitting element that emits white light having a chromaticity x of 0.3105 and a chromaticity y of 0.3160 in JIS Z 8110: 1995 and a color temperature of about 6700 K (Kelvin). Specifically, the LED 12 has a blue LED chip and a yellow phosphor material that covers the blue LED chip, and emits yellow light by exciting the yellow phosphor material with blue light emitted from the blue LED chip. Then, the blue light and the yellow light are combined to emit white light (that is, combined light). In addition to such a configuration, the LED 12 has a near-ultraviolet LED chip and an RGB phosphor material that covers the near-ultraviolet LED chip, and the RGB phosphor material is obtained by near-ultraviolet light emitted from the near-ultraviolet LED chip. A light emitting element that emits blue light, green light, and red light by excitation and emits white light by combining blue light, green light, and red light may be used. Further, the LED 12 has a red LED chip, a green LED chip, and a blue LED chip, and emits white light by combining red light, green light, and blue light emitted from each LED chip. It may be an element.

  As shown in FIGS. 4 and 6, in the optical body portion 17 according to the present embodiment, a total of 16 lenses are mounted on the lens holder 14 so that a lens that is one optical member faces each of the LEDs 12. Is provided. That is, six lenses are arranged concentrically on the center of the lens holder 14, and ten lenses are arranged concentrically so as to surround the six lenses. In other words, in the lens holder 14, 16 lenses are scattered and arranged from the center on the surface of the lens holder 14 toward the outer edge, that is, 16 lenses are dispersedly arranged. As a more specific configuration of the optical body portion 17 according to the present embodiment, four of the six lenses provided on the center portion of the lens holder 14 are narrow and the spread of the emitted light is relatively small. The first lens 15 that is a square lens or a medium angle lens is used, and the remaining two lenses are the second lens 16 that is a wide-angle lens in which the spread of emitted light is relatively large. Two of the ten lenses provided on the outer periphery of the lens holder 14 are the first lens 15 that is a narrow-angle lens or a medium-angle lens with a relatively small spread of the emitted light, and the remaining lenses. Eight are used as the second lens 16 which is a wide-angle lens in which the spread of the emitted light is relatively large.

  Hereinafter, a more specific arrangement relationship between the first lens 15 and the second lens 16 in the optical body portion 17 according to the present embodiment will be described with reference to FIGS. 4 and 6. First, the two first lenses 15 provided on the outer periphery of the lens holder 14 are juxtaposed in a straight line via the center 21 on the surface of the lens holder 14. That is, a line segment 22 connecting the two first lenses 15 provided on the outer peripheral portion of the lens holder 14 is substantially equal to the diameter of the lens holder 14. The eight second lens holders 16 provided on the outer periphery of the lens holder 14 are arranged symmetrically with the line segment 21 in between. Further, the eight second lens holders 16 provided on the outer peripheral portion of the lens holder 14 are arranged symmetrically across a line segment 23 that is orthogonal to the line segment 22 and passes through the center 21 on the surface of the lens holder 14. Has been.

  Next, two of the four first lenses 15 provided on the center portion of the lens holder 14 are arranged on the line segment 22. The remaining two of the four first lenses 15 provided on the center of the lens holder 14 and the two second lenses 16 provided on the center of the lens holder 14 are line segments 22. However, since the types are different, the arrangement relationship between the first lens 15 and the second lens 16 provided on the central portion of the lens holder 14 is the line segment 22. It is asymmetrical. The remaining two of the four first lenses 15 provided on the center of the lens holder 14 and the two second lenses 16 provided on the center of the lens holder 14 are: They are arranged symmetrically across the line segment 23.

  With the above-described configuration, either one of the first lens 15 or the second lens 16 is arranged in the light emitting direction of each LED 12, and the irradiation unit is configured so that one LED and one lens correspond to each other. And the light radiate | emitted from one LED will radiate | emit through one lens corresponding to it.

  Next, the lens holder 14 will be described with reference to FIGS. FIG. 7 is a front view of the lens holder 14 of the LED module 2 constituting the downlight 1 of the present embodiment. FIG. 8 is a cross-sectional view of the lens holder 14 taken along line VIII-VIII in FIG.

  The lens holder 14 is composed of a member having translucency, and for example, a transparent substrate such as a transparent glass substrate or a transparent plastic substrate can be used. By using such a member for the lens holder 14, the light emitted from the LED 12 is not absorbed or reflected by the lens holder 14, and the light emitting surface side of the downlight 1 (that is, the first lens 15 and the second lens 15). Irradiation light can be efficiently guided to the surface where the lens 16 is disposed.

  As shown in FIGS. 7 and 8, the lens holder 14 has a recess 24 in which a part of the first lens 15 and the second lens 16 is fitted in a portion where the LED 12 is disposed. As shown in FIG. 8, the opening 24 of the recess 24 formed in the lens holder 14 gradually decreases from the first surface 14a of the lens holder 14 toward the second surface 14b. This is to match the shape of the concave portion 24 with the shapes of the first lens 15 and the second lens 16, so that the concave portion 24 of the lens holder 14 and the first lens 15 and the second lens 16 are in close contact with each other. The first lens 15 and the second lens 16 can be firmly attached to the lens holder 14 using a bonding member such as an adhesive.

  Further, as shown in FIG. 7, when the downlight 1 is attached to the ceiling, a mark 25 indicating the attachment direction with respect to the wall is provided at a predetermined position on the outer peripheral portion of the surface of the lens holder 14. The mark 25 may be formed by processing the surface of the lens holder 14 or may be formed by applying a seal on the surface of the lens holder 14. In this embodiment, the shape of the mark 25 is a triangle. Therefore, when the downlight 1 is attached to the ceiling, the downlight 1 is attached so that the apex of the triangle adjacent to the outer periphery of the lens holder 14 faces the wall. A detailed description of the position of the mark 25 and the method of attaching the downlight 1 will be described later.

  Next, the first lens 15 and the second lens 16 will be described with reference to FIGS. 9 to 11. FIG. 9 is a front view of the first lens 15 of the LED module 2 constituting the downlight 1 of the present embodiment. FIG. 10 is a side view of the first lens 15 of the LED module 2 constituting the downlight 1 of the present embodiment. Further, FIG. 11 is a sectional view of the first lens 15 taken along line XI-XI in FIG.

  As can be seen from FIGS. 9 to 11, the first lens 15 has a substantially hemispherical shape as a whole, and has a structure in which a plurality of single lenses are arranged in the vertical and horizontal directions on the light emitting surface 15a side. It is a lens. As shown in FIG. 11, the first lens 15 has an opening 15c on the light incident surface 15b side. The bottom surface of the opening 15c protrudes toward the light incident surface 15b so as to form a convex lens. In the LED module 2 in a state where the light emitter portion 13 and the optical body portion 17 are joined, the LED 12 is disposed so as to face the opening 15 c of the first lens 15.

  As described above, the first lens 15 is a narrow-angle lens or a medium-angle lens in which the spread of emitted light is relatively small. In particular, it is preferable to use a lens having a half beam angle of the lens of less than 30 °. In this embodiment, a middle angle lens having a half beam angle of 25 ° is used as the first lens 15. Yes.

  As a raw material of the first lens 15, for example, borosilicate glass (BK7) or synthetic quartz can be used, but not limited to these, various lens materials that are generally used are used. it can.

  The second lens 16 is a fly-eye lens having an outer shape substantially the same as that of the first lens 15 and having the above-described structure. Therefore, the description of the structure of the second lens 16 using the drawings is omitted. As described above, unlike the first lens 15, the second lens 16 uses a wide-angle lens. In particular, it is preferable to use a lens having a half beam angle of 30 ° or more. In this embodiment, a wide-angle lens having a half beam angle of 50 ° is used as the second lens 16. . Accordingly, the second lens 16 has a light emission characteristic different from that of the first lens 15, and the condensing rate of the second lens is lower than the condensing rate of the first lens 15. In other words, compared with the case where the first lens 15 condenses the light emitted from the LED 12, the second lens 16 condenses the light emitted from the LED 12 weakly.

  In the present embodiment, the first lens 15 and the second lens 16 are substantially hemispherical fly-eye lenses, but the outer shape is not limited. For example, the side surface of the lens is a paraboloid. May be. In the present embodiment, the first lens 15 and the second lens 16 are fly-eye lenses in order to condense the light emitted from the LED 12, but a Fresnel lens that can condense the light, or A general biconvex lens or plano-convex lens may be used.

(Electric circuit diagram)
Next, the electric circuit configuration of the LED module 2 will be described with reference to FIG. FIG. 12 is an electric circuit diagram of the LED module 2. As shown in FIG. 12, each of the LEDs 12 is connected in parallel between the two external connection terminals 18. More specifically, the anodes of the LEDs 12 are connected to each other, and each anode is connected to one of the external connection terminals 18 in common. The cathodes of the LEDs 12 are connected to each other, and each cathode is commonly connected to the other external connection terminal 18.

  The circuit configuration of the LED module 2 is not limited to the parallel circuit as described above, and may be a series circuit in which the LEDs 12 are connected in series. In addition, the six LEDs 12 arranged on the central portion of the substrate 11 are connected in parallel, the ten LEDs 12 arranged on the outer peripheral portion of the substrate 11 are connected in parallel, and the six LEDs 12 are connected. A composite circuit in which a parallel circuit composed of the ten LEDs 12 and a parallel circuit composed of the ten LEDs 12 are connected in series may be used. Furthermore, the LEDs 12 arranged so as to correspond to the first lens 15 are connected in parallel, the LEDs 12 arranged so as to correspond to the second lens 16 are connected in parallel, and these parallel circuits are connected in series. It may be a composite circuit that connects. The circuit configuration of the LED module 2 may be a composite circuit composed of a combination of a series circuit and a parallel circuit of another configuration. The circuit configuration of the LED module 2 can be appropriately selected according to the use application and use situation of the lighting device which is the downlight 1.

  The light emitted from the downlight 1 may be dimmed by changing the current supplied to the LED 12. In such a case, a current adjustment circuit may be provided inside the LED module 2, or the current supplied to the LED module 2 may be adjusted outside the downlight 1.

(Installation of lighting device)
Next, while referring to FIG. 13 and FIG. 14, the mounting method of the downlight 1 of this embodiment and the positional relationship between the downlight 1 of this embodiment and the irradiated object such as a wall and a floor will be described. What kind of irradiation surface is formed on the irradiated object will be described. FIG. 13 shows a perspective view of the state in which the downlight 1 of this embodiment is attached to the ceiling 31 in the building 30. FIG. 14 is a plan view of the state in which the downlight 1 of this embodiment is attached to the building 30 when viewed from the ceiling toward the floor.

  As shown in FIG. 13, the downlight 1 is disposed indoors in a building 30 that is a space surrounded by a ceiling 31, a floor 32, and a wall 33. Specifically, the downlight 1 is attached to the ceiling 31 in the building 30 such that the light exit surface is parallel to the floor surface 32a. That is, the substrate 11 and the lens holder 14 which are constituent members of the downlight 1 are positioned in parallel with the floor surface 32a. The optical axis 41 of the downlight 1 itself extending from the center of the downlight 1 toward the floor 32 is orthogonal to the floor surface 32a. Therefore, the light irradiated from the downlight 1 reaches the floor surface 32a, and an irradiation surface 42 (second irradiation surface in claim 1) is formed on the floor 32 (floor surface 32a). Since the irradiation surface 42 is formed on the floor surface 32 a, the irradiation surface 42 is also orthogonal to the optical axis 41. Note that the optical axes of the LEDs 12 are parallel to each other and are also parallel to the optical axis 41 of the downlight 1 itself.

  Further, the downlight 1 is attached at a position close to the wall 33 (for example, a position separated from the wall 33 by 40 cm). Also in the building 30 in the present embodiment, since the floor surface 32a and the wall surface 33a are orthogonal to each other as in a general building, the optical axis 41 of the downlight 1 is parallel to the wall surface 33a. In this embodiment, since the downlight 1 is close to the wall 33, a part of the light emitted from the downlight 1 reaches the wall surface 33a, and the irradiation surface 43 is formed on the wall 33 (wall surface 33a). (First irradiation surface in claim 1) is formed. Since the irradiation surface 43 is formed on the wall surface 33a, the irradiation surface 43 is also parallel to the optical axis 41. The distance from the wall 33 of the downlight 1 varies as appropriate according to the size of the downlight 1 and the optical characteristics of the first lens 15 and the second lens 16 to be mounted, but is emitted from the downlight 1. It is preferable to set so that the light to reach the wall surface 33a.

  Next, the positional relationship between the first lens 15 and the second lens 16 constituting the downlight 1 of this embodiment and the wall will be described in detail with reference to FIG. In FIG. 14, an axis line orthogonal to the optical axis 41 and parallel to the wall surface 33a is defined as a first axis line 44 (shown by a broken line), and an axis line orthogonal to the optical axis 41 and the wall surface 33a is defined as a second axis line 45 (shown by a broken line). Defined).

  As described above, the mark 25 is provided on the outer periphery of the lens holder 14. In this embodiment, the mark 25 is provided on the line segment 23 in FIGS. 4 and 6 on the side close to the first lens 15 formed concentrically at the center of the lens holder 14. . Then, the downlight 1 is attached to the ceiling 31 so that the apex of the triangular mark 25 provided in this way is close to the outer edge of the lens holder 14 and faces the wall 33. That is, the downlight 1 is attached to the ceiling 31 so that the line segment 22 in FIGS. 4 and 6 is parallel to the wall surface 32a, in other words, the line segment 23 in FIGS. 4 and 6 is orthogonal to the wall surface 23a. It will be. By attaching the downlight 1 to the ceiling 31 as described above, the line segment 22 in FIGS. 4 and 6 is positioned on the first axis 44, and the line segment 23 in FIGS. 4 and 6 is on the second axis 45. Will be located.

  As shown in FIG. 14, the four lenses arranged on the first axis 44 that is parallel to the wall surface 33a become the first lens 15 that is a medium angle lens. For this reason, the optical members arranged at the outermost ends in the extending direction of the first axis 44 that is parallel to the wall surface 33a are the first lenses 15 that are medium-angle lenses. In other words, the lenses provided for the LEDs 12 located at the outermost ends on the first axis 44 extending in the direction parallel to the wall surface 33a become the first lens 15 that is a medium angle lens.

  In addition, when the lens holder 14 is partitioned by the second axis 44, among the lenses formed concentrically at the center of the lens holder 14, a lens disposed in a region on the side away from the wall surface 33 a is a wide-angle lens. A second lens 16 is obtained. The remaining part of the lens formed concentrically at the center of the lens holder 14 (that is, the lens on the side close to the wall surface 33a and the lens on the second axis 44) is the first lens 15 that is a medium angle lens. Become. In other words, when the LED 12 arranged concentrically in the central portion on the substrate 11 is partitioned by the first axis 44, the second LED 12 is arranged with respect to the LED 12 arranged in the region away from the wall surface 33a. The lens 15 is provided, and the first lens 15 is provided for the remaining portion of the LED 12 on the side close to the wall surface 33 a and the LED 12 on the second axis 44.

  Further, among the lenses arranged concentrically on the outer peripheral portion of the lens holder 14, the remaining lens not arranged on the first axis 44 becomes the second lens 16 which is a wide-angle lens. Accordingly, the two lenses arranged closest to the wall surface 33a in FIG. 14 are the second lens 16 that is a wide-angle lens. In other words, the lens provided for the LED 12 located closest to the wall surface 33a is the second lens 16 which is a wide-angle lens.

  Of the lenses arranged concentrically at the center of the lens holder 14, the lens arranged on the side away from the wall surface 33 a is the second lens 16, and concentrically at the center of the lens holder 14. Of the arranged lenses, the remaining lens that is not arranged on the first axis 44 is the second lens 16, and therefore, when the lens holder 14 is partitioned by the first axis 44, an area on the side away from the wall surface 33 a. In this case, a large number of second lenses 16 that are wide-angle lenses are arranged.

  With reference to FIGS. 4 and 6, a more specific arrangement relationship between the first lens 15 and the second lens 16 in the optical body portion 17 has been described. A line segment 22 in FIGS. 4 and 6 is a first axis. 4 and FIG. 6 is located on the second axis 45, each of the first lens 15 and the second lens 16 in the downlight 1 sandwiches the first axis 44. It is provided asymmetrically. Further, each of the first lens 15 and the second lens 16 in the downlight 1 is arranged symmetrically via the second axis 45.

(Effect of this embodiment)
As described above, in the LED module 2 constituting the downlight 1 of the present embodiment, the first lens 15 and the second lens 16 are arranged symmetrically with the line segment 23 and the second axis 45 interposed therebetween. In the LED module 2 as a whole, the first lens 15 and the second lens 16 are not arranged symmetrically with respect to the line segment 22 and the first axis 44, but are arranged concentrically on the outer periphery of the lens holder 14. The first lens 15 and the second lens 16 are arranged symmetrically with respect to the line segment 22 and the first axis 44, and the number of the first lens 15 and the second lens 16 located in the asymmetrical central portion is four. Since it is smaller than the number (12) of the other symmetrical first lenses 15 and second lenses 16, the light emitted from the downlight 1 is not greatly affected. Furthermore, in the LED module 2, most of the first lens 15 that is a medium-angle lens is disposed at the center of the lens holder 14, and most of the second lens that is a wide-angle lens is disposed at the outer periphery of the lens holder 14. Yes. With the arrangement of the first lens 15 and the second lens 16, the floor surface 32a is irradiated with uniform light without unevenness, and the irradiation surface 42 formed on the floor 32 (floor surface 32a) is bright and dark. Unevenness does not occur.

  Further, in the LED module 2 constituting the downlight 1 of the present embodiment, the lenses provided for the LEDs 12 arranged at the outermost ends of the first axis 44 in the direction parallel to the wall surface 33a are medium angle lenses. Since it is a certain first lens 15, the light emitted from the first lens 15 is difficult to reach the wall surface 33a. Here, the light emitted from the lenses arranged at the outermost ends of the first axis 44 in the direction parallel to the wall surface 33a is considered to have a great influence on the formation of the irradiation surface 43 on the wall 33 (wall surface 33a). By such an arrangement of the first lens 15, the wall surface 33a is irradiated with uniform light without unevenness, and unevenness in brightness and darkness is less likely to occur on the irradiation surface 43 formed on the wall 33 (wall surface 33a). .

  Further, in the LED module 2 constituting the downlight 1 of the present embodiment, when the second lens 16 that is a wide-angle lens is provided corresponding to the LED 12 disposed closest to the wall surface 33a, the second lens 16 is provided. Since the light emitted from the light is irradiated onto the wall surface 33a uniformly and uniformly, the irradiation surface 43 can be easily formed on the wall 33 (wall surface 33a).

  And in the LED module 2 which comprises the downlight 1 of a present Example, since the 1st lens 15 and the 2nd lens 16 are arrange | positioned symmetrically on both sides of the line segment 23 and the 2nd axis line 45, it is more uneven. Uniform light without light is irradiated onto the wall surface 33a, and the occurrence of uneven brightness on the irradiation surface 43 formed on the wall surface 33a is further reduced.

  Further, in the LED module 2 constituting the downlight 1 of the present embodiment, when the lens holder 14 is partitioned by the first axis 44, the second lens 16 that is a wide-angle lens is increased in the region away from the wall surface 33a. By arranging the light, the light emitted from the second lens 16 is radiated to the wall surface 33a evenly and evenly from the wall surface 33a, so that the wall surface 33a is irradiated with more uniform light without unevenness. Therefore, the occurrence of uneven brightness on the irradiation surface 43 formed on the wall 33 (wall surface 33a) is further reduced.

  As described above, the downlight 1 according to the present embodiment can irradiate the wall surface 33a and the floor surface 34a with uniform light without unevenness, and simultaneously form the irradiation surfaces 42 and 43 with little brightness unevenness. It is possible to produce a higher spatial performance.

  Further, in the LED module 2 constituting the downlight 1 of the present embodiment, the lens holder 14 is provided with a mark 25 indicating the mounting direction of the downlight 1 with respect to the wall 33, so that the downside is provided on the ceiling 31 of the building 30. When the light 1 is attached, the downlight 1 can be attached without failing in the wrong direction, and the effect of the downlight 1 of the present embodiment can be easily and reliably brought about.

(About different configuration examples)
In the above-described embodiments, the downlight has been described as an example of the lighting device. However, the lighting device according to the present invention can be applied to various general lighting devices such as a spotlight and a universal downlight in addition to the downlight. Can do.

  In the above-described embodiment, the emission color of the LED 12 is white light having a color temperature of about 6700 K (Kelvin). However, the two irradiation surfaces 42 and 43 as described above are formed on the floor and the wall. If it is possible, it is not limited to these luminescent colors. For example, the light emission color of the LED 12 may be white light having a different color temperature, such as a light bulb color white light having a color temperature of about 2700 K (Kelvin), or may be colored such as blue, yellow-red, red, or green. As described above, since LEDs having various emission colors can be selected and used, various space effects with different colors can be performed according to the usage and situation of the downlight 1 that is a lighting device. .

  In the above-described embodiments, the first lens 15 and the second lens 16 are condensing lenses. However, in order to make the second lens 16 have a light emission characteristic different from that of the first lens 15, condensing light. It is good also as a diffuser lens, without being limited to a lens. Even if the second lens 16 is a diffusing lens, the effects of the present embodiment as described above can be obtained.

  Furthermore, in the above-described embodiments, the LEDs 12 and the lenses that are optical members provided for them are arranged concentrically, but are not limited to such an arrangement, for example, the same ellipse. It may be arranged in a circumferential shape. Further, the plurality of LEDs 12 may be distributed uniformly or randomly on the substrate 11, and the first lens 15 and the second lens 16 may be provided so as to correspond to the LEDs 12. Even in such a case, by setting the lenses provided for the LEDs 12 arranged at the outermost ends of the first axis 44 in the direction parallel to the wall surface 33a as the first lens 15 that is a medium angle lens, Brightness and darkness unevenness of the irradiation surface 43 formed on the wall 33 can be reduced. Moreover, the irradiation surface 43 can be easily formed in the wall surface 33a by providing the 2nd lens 16 which is a wide angle lens with respect to LED12 arrange | positioned nearest to the wall surface 33a. Furthermore, when the lens holder 14 is partitioned by the first axis 44, the second lens 16 that is a wide-angle lens is disposed in a region on the side away from the wall surface 33a, so that the irradiation surface 43 formed on the wall surface 33a The occurrence of light / dark unevenness can be further reduced.

  In the above-described embodiment, the mark 25 is provided on the lens holder 14, but it is another member constituting the downlight 1 and can be easily visually observed (for example, the housing 5 or the like). A mark 25 may be provided on the outer frame 6).

  And in the Example mentioned above, although the case where the downlight 1 was installed indoors in the building 30 was assumed, the illuminating device which concerns on this invention may be installed outdoors, without being limited indoors. .

<Modification 1>
The positional relationship between the first lens 15 and the second lens 16 and the wall 33 is not limited to that according to the above-described embodiment, and the effects according to the above-described embodiment can be obtained even in other positional relationships. Can be obtained. Hereinafter, an arrangement relationship between the first lens 15 and the second lens 16 and the wall 33, which is different from the above-described embodiment, will be described with reference to FIG. FIG. 15 is a front view of the LED module 2 according to Modification 1 shown in the same manner as FIG. In this modification, only the positions where the first lens 15 and the second lens 16 are provided are different from those in the above-described embodiment. Therefore, the same members as those in the above-described embodiment are denoted by the same reference numerals, and the description thereof is omitted. Is omitted.

  As can be seen by comparing FIG. 14 and FIG. 15, in the LED module 2 according to this modification, all of the lenses provided in the central portion of the lens holder 14 are the first lenses 15 that are medium-angle lenses. Other lens arrangements are the same as in the above-described embodiment. Therefore, since the configuration is almost the same as that of the above-described embodiment, the same effect as that of the above-described embodiment can be obtained.

  Specifically, in the LED module 2 of the first modification, the first lens 15 and the second lens 16 are arranged symmetrically with the second axis 45 interposed therebetween. Further, the first lens 15 and the second lens 16 are arranged symmetrically with the first axis 44 interposed therebetween. Furthermore, in the LED module 2, most of the first lens 15 that is a medium-angle lens is disposed at the center of the lens holder 14, and the second lens 16 that is a wide-angle lens is disposed at the outer periphery of the lens holder 14. . With such an arrangement of the first lens 15 and the second lens 16, the floor surface 32a is irradiated with uniform light without unevenness, and the irradiation surface 42 (see FIG. 13) formed on the floor surface 32a. Brightness / darkness unevenness does not occur.

  In the LED module 2 of the first modification, the lenses provided for the LEDs 12 disposed at the outermost ends of the first axis 44 in the direction parallel to the wall surface 33a are the first lenses 15 that are medium-angle lenses. Therefore, the light emitted from the first lens 15 does not easily reach the wall surface 33a. Here, the light emitted from the lenses arranged at the outermost ends of the first axis 44 in the direction parallel to the wall surface 33a is considered to have a great influence on the formation of the irradiation surface 43 (see FIG. 13) on the wall surface 33a. For this reason, the arrangement of the first lens 15 causes the wall surface 33a to be irradiated with uniform light without unevenness, and unevenness in brightness and darkness is less likely to occur on the irradiation surface 43 formed on the wall surface 33a.

  Furthermore, in the LED module 2 of the first modification, when the second lens 16 that is a wide-angle lens is provided corresponding to the LED 12 disposed closest to the wall surface 33a, the light emitted from the second lens 16 is emitted. Since the wall surface 33a is irradiated uniformly and widely on the wall surface 33a, the irradiation surface 43 (see FIG. 13) can be easily formed on the wall surface 33a.

  And in the LED module 2 of this modification 1, since the 1st lens 15 and the 2nd lens 16 are arrange | positioned symmetrically on both sides of the 2nd axis line 45, the more uniform light with more nonuniformity is given to the wall surface 33a. Irradiation is performed, and the occurrence of uneven brightness on the irradiation surface 43 (see FIG. 13) formed on the wall surface 33a is further reduced.

  As described above, the downlight 1 according to the first modification irradiates the wall surface 33a and the floor surface 34a with uniform light without unevenness, and the irradiation surfaces 42 and 43 with little brightness unevenness (see FIG. 13). Can be formed simultaneously, and a higher space production can be performed.

  Further, in the LED module 2 of the first modification, the lens holder 14 is provided with the mark 25 indicating the mounting direction of the downlight 1 with respect to the wall 33, so that when the downlight 1 is mounted on the ceiling 31 of the building 30. In addition, the downlight 1 can be securely attached without making a mistake in the mounting direction, and the effect of the downlight 1 can be easily and reliably brought about.

<Modification 2>
The arrangement relationship between the first lens 15 and the second lens 16 and the wall 33 is not limited to that according to the above-described embodiment and the first modification, and the above-described embodiments may be used even in other arrangement relationships. The effect which concerns on can be acquired. Hereinafter, an arrangement relationship between the first lens 15 and the second lens 16 and the wall 33, which is different from the above-described example and modification example 1, will be described with reference to FIG. FIG. 16 is a front view of the LED module 2 according to Modification 2 shown in the same manner as FIG. In this modification, only the positions where the first lens 15 and the second lens 16 are provided are different from those in the above-described embodiment. Therefore, the same members as those in the above-described embodiment are denoted by the same reference numerals, and the description thereof is omitted. Is omitted.

  As can be seen by comparing FIG. 14 and FIG. 16, in the LED module 2 according to the present modification, among the lenses provided concentrically at the center of the lens holder 14, the lens module 14 is positioned on the side closer to the wall surface 33 a. The second lens 16 is a wide-angle lens, the lens located on the side away from the wall surface 33a is the first lens 15 that is a medium-angle lens, and other lens arrangements are the same as in the above-described embodiment. In other words, the lenses arranged concentrically at the center of the lens holder 14 are replaced with respect to the first axis 44. Therefore, since the configuration is almost the same as that of the above-described embodiment, the same effect as that of the above-described embodiment can be obtained.

  Specifically, in the LED module 2 of Modification 2, the first lens 15 and the second lens 16 are arranged symmetrically with the second axis 45 interposed therebetween. Further, in the entire LED module 2, the first lens 15 and the second lens 16 are not arranged symmetrically with respect to the first axis 44, but are arranged concentrically on the outer periphery of the lens holder 14. The first lens 15 and the second lens 16 are arranged symmetrically with respect to the first axis 44, and the number of the first lens 15 and the second lens 16 located in the asymmetrical central portion is four, and the other symmetrical first lenses Since the number is smaller than the number of the first lens 15 and the second lens 16 (12), the light emitted from the downlight 1 is not greatly affected. Furthermore, in the LED module 2, most of the first lens 15 that is a medium-angle lens is disposed at the center of the lens holder 14, and the second lens 16 that is a wide-angle lens is disposed at the outer periphery of the lens holder 14. . With such an arrangement of the first lens 15 and the second lens 16, the floor surface 32a is irradiated with uniform light without unevenness, and the irradiation surface 42 (see FIG. 13) formed on the floor surface 32a. Brightness / darkness unevenness does not occur.

  In the LED module 2 of the second modification, the lenses provided for the LEDs 12 disposed at the outermost ends of the first axis 44 in the direction parallel to the wall surface 33a are the first lenses 15 that are medium-angle lenses. Therefore, the light emitted from the first lens 15 does not easily reach the wall surface 33a. Here, since the emitted light from the lenses arranged at the outermost ends of the first axis 44 in the direction parallel to the wall surface 33a is considered to have a great influence on the formation of the irradiation surface 43 on the wall surface 33a, Due to the arrangement of the first lens 15, the wall surface 33a is irradiated with uniform light without unevenness, and light and dark unevenness hardly occurs on the irradiation surface 43 (see FIG. 13) formed on the wall surface 33a.

  Furthermore, in the LED module 2 of the second modification, when the second lens 16 that is a wide-angle lens is provided corresponding to the LED 12 that is disposed closest to the wall surface 33a, the light emitted from the second lens 16 is emitted. Since the wall surface 33a is irradiated uniformly and widely on the wall surface 33a, the irradiation surface 43 (see FIG. 13) can be easily formed on the wall surface 33a.

  And in the LED module 2 of this modification 2, since the 1st lens 15 and the 2nd lens 16 are arrange | positioned symmetrically on both sides of the 2nd axis line 45, the more uniform light with more nonuniformity is given to the wall surface 33a. Irradiation is performed, and the occurrence of uneven brightness on the irradiation surface 43 (see FIG. 13) formed on the wall surface 33a is further reduced.

  As described above, the downlight 1 according to the second modification irradiates the wall surface 33a and the floor surface 34a with uniform light without unevenness, and the irradiation surfaces 42 and 43 with little brightness unevenness (see FIG. 13). Can be formed simultaneously, and a higher space production can be performed.

  Further, in the LED module 2 of the second modification, the lens holder 14 is provided with the mark 25 indicating the mounting direction of the downlight 1 with respect to the wall 33, and therefore when the downlight 1 is mounted on the ceiling 31 of the building 30. In addition, the downlight 1 can be securely attached without making a mistake in the mounting direction, and the effect of the downlight 1 can be easily and reliably brought about.

<Modification 3>
The number of the first lens 15 and the second lens 16 and the positional relationship between the first lens 15 and the second lens 16 and the wall 33 are limited to those according to the above-described embodiments and the first and second modifications. There may be other quantities and configurations. Hereinafter, an LED module different from the LED module 2 according to the above-described embodiment, Modification 1 and Modification 2 will be described as Modification 3 with reference to FIGS. 17 and 18. Here, FIG. 17 is a front view of the LED module 102 according to Modification 3 shown in the same manner as FIG. 13, and FIG. 18 is a cross-sectional view taken along line XVIII-XVIII in FIG.

  As can be seen from FIG. 17 and FIG. 18, the LED module 102 includes a light emitter portion 113 in which eight LEDs 112 are provided on a substrate 111, four first lenses 115 and four first lenses on a lens holder 114. It has a structure in which an optical body 117 provided with two lenses 116 is joined by a joining member (not shown) such as a screw.

  In the light emitter 113, one LED 112 is disposed on the central portion of the substrate 111, and seven LEDs 112 are concentrically disposed so as to surround the one LED 112. That is, one LED 112 is disposed at the center of the substrate 111 and seven LEDs 112 are disposed at the outer periphery of the substrate 111. In addition, an external connection terminal 118 is provided on the substrate 111, and a power wiring for supplying power to the LED 112 is connected to the external connection terminal 118. The LED 112 is connected to the external connection terminal 118 by a wiring (not shown) patterned on the substrate 111.

  The substrate 111 is made of the same member as the substrate 11 of the above-described embodiment, the LED 112 is the same as the LED 12 of the above-described embodiment, the lens holder 114 is the same as the lens holder 14 of the above-described embodiment, and the first lens 115 Is the same as the first lens 15 of the above-described embodiment, and the second lens 116 is the same as the second lens 16 of the above-described embodiment, and thus detailed description thereof is omitted.

  As shown in FIG. 17, a total of eight lenses are provided in the lens holder 114 so that one lens faces each of the LEDs 112. That is, one lens is arranged at the center of the lens holder 114, and seven lenses are arranged concentrically so as to surround the one lens. As a more specific configuration of the optical body portion 117 according to the present modification, one lens provided at the center portion of the lens holder 114 is replaced with a narrow-angle lens or a medium-angle lens with a relatively small spread of emitted light. The first lens 115 is Also, three of the seven lenses provided on the outer periphery of the lens holder 114 are the first lens 115 that is a narrow-angle lens or a medium-angle lens with a relatively small spread of the emitted light, and the remaining lenses. The four lenses are the second lenses 116 that are wide-angle lenses having a relatively large spread of the emitted light.

  Moreover, since the attachment method of a downlight provided with the LED module 102 which concerns on this modification is the same as that of the Example mentioned above, an irradiation surface is formed with respect to a floor and a wall similarly to the Example mentioned above. . That is, an irradiation surface as shown in FIG. 13 is formed on the floor and the wall.

  Next, the positional relationship between the first lens 115 and the second lens 116 constituting the LED module 102 according to this modification and the wall will be described in detail with reference to FIG. In FIG. 17, an axis line orthogonal to the optical axis of the LED module 102 itself and parallel to the wall surface 133a is defined as a first axis 144 (shown by a broken line), and the axis line orthogonal to the optical axis of the LED module 102 itself and the wall surface 133a. Is defined as a second axis 145 (indicated by a dashed line).

  Similar to the above-described embodiment, a mark 125 is provided on the outer periphery of the lens holder 114. In this modification, the marks 125 are provided at equal intervals from the second lenses 116 arranged adjacent to each other on the outer periphery of the lens holder 114. And the downlight provided with the LED module 102 according to the present modification is attached to the ceiling so that the apex of the triangular mark provided in this way faces the wall 133 near the outer edge of the lens holder 114. .

  As shown in FIG. 17, the three lenses arranged on the first axis 144 that is parallel to the wall surface 133a become the first lens 115 that is a medium angle lens. That is, the optical members disposed at the outermost ends in the extending direction of the first axis 144 that is parallel to the wall surface 1133a are the first lenses 115 that are medium-angle lenses. In other words, the lenses provided for the LEDs 112 located at the outermost ends in the direction extending in the direction parallel to the wall surface 133a become the first lens 115 which is a medium angle lens.

  Among the lenses arranged concentrically on the outer periphery of the lens holder 114, one of the remaining lenses not arranged on the first axis 144 is a first lens 115 that is a medium angle lens. Four are the second lenses 116 which are wide-angle lenses. In FIG. 17, the two lenses arranged closest to the wall surface 133a are the second lenses 116 that are wide-angle lenses. In other words, the lens provided for the LED 112 located closest to the wall surface 33a is the second lens 116 that is a wide-angle lens. Furthermore, in FIG. 17, the lens disposed farthest from the wall surface 133a is the first lens 115 which is a medium angle lens. In other words, the lens provided for the LED 112 positioned farthest from the wall surface 133a is the first lens 115 that is a medium angle lens.

  As described above, in the LED module 102 according to this modification, the first lens 115 and the second lens 116 are arranged symmetrically with the second axis 145 interposed therebetween. In the LED module 102, one of the first lenses 115, which is a medium-angle lens, is disposed at the center of the lens holder 14, and the remaining three are disposed at the outer periphery of the lens holder 14. A certain second lens 116 is disposed on the outer periphery of the lens holder 114. That is, only the first lens 115 that is a middle-angle lens is disposed at the center of the lens holder 114, and many second lenses that are wide-angle are disposed at the outer periphery of the lens holder 114. By such an arrangement of the first lens 115 and the second lens 116, the floor surface 132a is irradiated with uniform light without unevenness, and light and dark unevenness occurs on the irradiation surface formed on the floor surface 132a. There is no.

  Further, in the LED module 102 according to the present modification, the lens provided for the LEDs 112 disposed at the outermost ends in the direction parallel to the wall surface 133a is the first lens 115 that is a middle-angle lens, so the first lens The light emitted from 115 becomes difficult to reach the wall surface 133a. Here, since the light emitted from the lenses arranged at the outermost ends in the direction parallel to the wall surface 133a is considered to have a great influence on the formation of the irradiation surface on the wall surface 133a, the arrangement of the first lens 115 like this. Thus, the wall surface 133a is irradiated with uniform light without unevenness, and light and dark unevenness is less likely to occur on the irradiation surface formed on the wall surface 133a.

  Furthermore, in the LED module 102 according to this modification, when the second lens 116 that is a wide-angle lens is provided corresponding to the LED 112 disposed closest to the wall surface 133a, the light emitted from the second lens 116 is emitted. Since the wall surface 133a is irradiated uniformly and widely on the wall surface 133a, the irradiation surface can be easily formed on the wall surface 133a.

  In the LED module 102 according to this modification, the first lens 115 and the second lens 116 are arranged symmetrically across the second axis 145, so that uniform light without unevenness is applied to the wall surface 133a. As a result, the occurrence of uneven brightness on the irradiated surface formed on the wall surface 133a is further reduced.

  As described above, the downlight including the LED module 102 according to the present modification irradiates the wall surface 133a and the floor surface 134a with uniform light without unevenness, and simultaneously forms two irradiation surfaces with less brightness unevenness. Can be performed, and a higher space production can be performed.

  Further, in the LED module 102 according to this modification, the lens holder 114 is provided with the mark 25 indicating the mounting direction of the downlight with respect to the wall 133. Therefore, when mounting the downlight on the ceiling of the building, It is possible to reliably perform the downlight mounting direction without making a mistake, and the effect of the downlight can be easily and reliably brought about.

1 Downlight (lighting device)
2, 102 LED module 3 Main body 4 Opening 5 Housing 6 Outer frame 7 Fixing member 11, 111 Substrate 12, 112 First LED (light emitting element)
13, 113 Light emitter 14, 114 Lens holder 15, 115 First lens (first optical member)
15a Light exit surface 15b Light entrance surface 15c Aperture 16, 116 Second lens (second optical member)
17, 117 Optical body portion 18, 118 External connection terminal 25, 125 Mark 30 Building 31 Ceiling 32 Floor 32a, 132a Floor surface 33, 133 Wall 33a, 133a Wall surface 41 Optical axis 42, 43 Irradiation surface 44, 144 First axis 45 145 Second axis

Claims (14)

An illumination device that forms a first irradiation surface on a surface parallel to an optical axis and forms a second irradiation surface on a surface orthogonal to the optical axis,
A substrate disposed parallel to a plane orthogonal to the optical axis;
A plurality of light emitting elements distributed on the substrate;
A first optical member provided for each of a part of the plurality of light emitting elements in the light emitting direction of the light emitting element;
Provided for each of the remaining portions of the plurality of light emitting elements in the light emitting direction of the light emitting elements, and collects light emitted from the light emitting elements more weakly than the first part optical member, or the light emission A second optical member that diffuses light emitted from the element,
The lighting device according to claim 1, wherein the first optical member is provided at least with respect to the light emitting elements arranged at outermost ends in a direction parallel to the first irradiation surface on the substrate.   The lighting device according to claim 1, wherein the second optical member is provided with respect to the light emitting element disposed closest to the first irradiation surface.   2. The first optical member and the second optical member, respectively, are provided asymmetrically across a first axis that is orthogonal to the optical axis and parallel to the first irradiation surface. Or the illuminating device of 2.   4. The illumination device according to claim 3, wherein a plurality of the second optical members are provided in a region on the side away from the first irradiation surface when the second optical member is partitioned by the first axis.   The lighting device according to claim 4, wherein the light emitting elements are arranged concentrically at a central portion and an outer peripheral portion on the substrate. The second optical member is a part of the light emitting element that is concentrically arranged in a central portion on the substrate, and is separated from the first irradiation surface when partitioned by the first axis. Provided for each of the light emitting elements disposed in a region,
The lighting device according to claim 5, wherein the first optical member is provided for each of the remaining portions of the light emitting elements arranged concentrically at a central portion on the substrate.   The second optical member is a part of the light emitting element arranged concentrically on the outer peripheral portion on the substrate, and is arranged at outermost ends in a direction parallel to the first irradiation surface on the substrate. The illumination device according to claim 6, wherein the illumination device is provided for the light emitting elements other than the light emitting elements.   Each of the said 1st optical member and the said 2nd optical member is provided symmetrically on both sides of the 2nd axis line orthogonal to the said optical axis and the said 1st irradiation surface. The lighting device according to any one of the above.   The lighting device according to any one of claims 1 to 8, wherein the first irradiation surface is formed on a wall and the second irradiation surface is formed on a floor.   It has a mark indicating a mounting direction in which the wall and a line segment connecting the light emitting elements arranged at outermost ends in a direction parallel to the first irradiation surface on the substrate are parallel to each other. The lighting device according to claim 9.   The lighting device according to any one of claims 1 to 10, wherein the first optical member is a narrow-angle lens or a medium-angle lens, and the second optical member is a wide-angle lens.   The illumination apparatus according to claim 11, wherein the 1/2 beam angle of the first optical member is less than 30 °, and the 1/2 beam angle of the second optical member is 30 ° or more.   The lighting device according to claim 1, wherein optical axes of the light emitting elements are parallel to each other.   A building comprising the lighting device according to claim 1 attached to a ceiling in the vicinity of a building wall surface.

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