Lighting fixtures

Abstract

To reduce waste of a substrate, and make a lamp image large.SOLUTION: A lighting apparatus 100 comprises an apparatus body 110, and a light emitting module 10 having a substrate 11 mounted to the apparatus body 110, and a plurality of light emitting elements 21 arranged on a main face 11a of the substrate 11. An outer shape in a plan view of the substrate 11 is a polygonal shape. The plurality of light emitting elements 21 includes a plurality of light emitting elements 211 constituting a first element row 201, a plurality of light emitting elements 212 constituting a second element row 202, and a plurality of light emitting elements 213 arranged between the first element row 201 and the second element row 202. The main face 11a includes a first area 13a along a side 17 of the substrate 11, and a second area 13b nearer a corner part 18 of the substrate 11 than the first area 13a. An interval between the first element row 201 and the second element row 202 is larger in the second area 13b than in the first area 13a. The plurality of light emitting elements 213 is arranged in the second area 13b.SELECTED DRAWING: Figure 6

Description

[Technical field]

[0001] The present invention relates to a lighting fixture. [Background technology]

[0002] Conventionally, ceiling lights, which are lighting fixtures that are attached to a ceiling surface, have been known. For example, a ceiling light disclosed in Patent Document 1 includes a fixture body, a mounting part for mounting the fixture body to a ceiling surface, a plurality of LED (Light Emitting Diode) light emitting parts provided on the periphery of the fixture body, and a cover provided to cover the LED light emitting parts. The LED light emitting parts have an arc-shaped LED board that is divided so as to divide the circumference into four parts. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] JP 2013-45630 A Summary of the Invention [Problem to be solved by the invention]

[0004] Generally, one or more substrates of a given shape are formed by cutting out one sheet of plate material. In the above-mentioned conventional ceiling light, the LED substrate is arc-shaped, so there is a lot of waste when cutting out. On the other hand, in order to ensure the size of the circular lamp image, it is desirable to arrange the LEDs in a circular ring shape, so a circular LED substrate is suitable.

[0005] SUMMARY OF THE PRESENT EMBODIMENT An object of the present invention is to provide a lighting fixture that can reduce waste of a board and make the lamp image look larger. [Means for solving the problem]

[0006] A lighting device according to one embodiment of the present invention comprises a device body, a substrate attached to the device body, and a light-emitting module having a plurality of light-emitting elements arranged on a main surface of the substrate, wherein the substrate has a polygonal outer shape in a planar view, the plurality of light-emitting elements are arranged in a ring shape along the outer shape of the substrate and include a plurality of first light-emitting elements constituting a first element row, a plurality of second light-emitting elements arranged in a ring shape inside the first element row and constituting a second element row, and a plurality of third light-emitting elements arranged between the first element row and the second element row, the main surface includes a first region along an edge of the substrate and a second region closer to a corner of the substrate than the first region, the distance between the first element row and the second element row is larger in the second region than in the first region, and the plurality of third light-emitting elements are arranged in the second region. Effect of the Invention

[0007] According to the lighting fixture of the present invention, it is possible to reduce waste of the board and make the lamp image look larger. [Brief description of the drawings]

[0008] [Figure 1] FIG. 1 is a perspective view showing an external appearance of a lighting fixture according to an embodiment. [Diagram 2] FIG. 2 is an exploded perspective view of the lighting fixture according to the embodiment. [Diagram 3] FIG. 3 is a perspective view showing a structural relationship between the light emitting module and optical members according to the embodiment. [Figure 4] FIG. 4 is a plan view of the light emitting module according to the embodiment. [Diagram 5] FIG. 5 is a plan view showing each region of the light emitting module according to the embodiment. [Figure 6] FIG. 6 is an enlarged plan view of region VI in FIG. [Figure 7] FIG. 7 is a plan view of an optical member according to an embodiment. [Figure 8] FIG. 8 is a cross-sectional view of the lighting fixture taken along line VIII-VIII in FIG. [Figure 9] FIG. 9 is a diagram showing a lamp image of a lighting fixture according to the embodiment. [Figure 10] FIG. 10 is a plan view of a lighting fixture according to a modified example with a lighting cover and a circuit cover removed. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0009] In the following, a lighting device according to an embodiment of the present invention will be described in detail with reference to the drawings. Note that each of the embodiments described below shows a specific example of the present invention. Therefore, the numerical values, shapes, materials, components, arrangement and connection of the components, steps, and order of steps shown in the following embodiments are merely examples and are not intended to limit the present invention. Therefore, among the components in the following embodiments, components that are not described in the independent claims will be described as optional components.

[0010] In addition, each figure is a schematic diagram and is not necessarily illustrated precisely. Therefore, for example, the scales in each figure do not necessarily match. In addition, in each figure, substantially the same configurations are given the same reference numerals, and duplicated explanations are omitted or simplified.

[0011] Furthermore, in this specification, terms indicating the relationship between elements, such as parallel and orthogonal, terms indicating the shape of elements, such as circular or rectangular, and numerical ranges are not expressions that only express a strict meaning, but are expressions that include a substantially equivalent range, for example, a difference of about a few percent.

[0012] In this specification and the drawings, the X-axis, the Y-axis, and the Z-axis represent the three axes of a three-dimensional orthogonal coordinate system.

[0013] In this specification, unless otherwise specified, "plan view" means viewing the main surface of the substrate of the light emitting module from the front. The Z axis is defined to coincide with the normal line of the main surface of the substrate. Therefore, "plan view" means viewing from the Z axis direction (specifically, the Z axis positive direction).

[0014] In addition, in this specification, ordinal numbers such as "first" and "second" do not refer to the number or order of components, unless otherwise specified, but are used for the purpose of avoiding confusion between and distinguishing between components of the same type.

[0015] (Embodiment) [Overall configuration of lighting fixtures] First, the overall configuration of a lighting fixture 100 according to an embodiment will be described with reference to Figures 1 and 2. Figure 1 is a perspective view showing the external appearance of lighting fixture 100 according to an embodiment. Figure 2 is an exploded perspective view of lighting fixture 100 according to an embodiment. The upward direction (positive direction of the Z axis) in Figures 1 and 2 corresponds to the direction of a floor surface (not shown) facing ceiling 4. In other words, lighting fixture 100 in Figures 1 and 2 is shown upside down from its normal use. The same applies to Figures 3 and 8 described below.

[0016] The lighting fixture 100 of this embodiment is, for example, a ceiling light attached to a ceiling 4. As shown in Fig. 2, the lighting fixture 100 includes a fixture body 110 and a light-emitting module 10 attached to the fixture body 110.

[0017] The light-emitting module 10 includes a substrate 11 and a plurality of light-emitting elements 21 arranged on a main surface 11a of the substrate 11. In the present embodiment, a plurality of circuit components 81 are further arranged on the main surface 11a of the substrate 11. The plurality of circuit components 81 constitute a power supply circuit 80.

[0018] The lighting fixture 100 further includes a reflective sheet 40 disposed along the light-emitting module 10, a circuit cover 50, an optical member 60 having a plurality of lenses 61, a lighting cover 70, and a fixture mounting portion 90. A decorative plate 71 is attached to the outer periphery of the lighting cover 70.

[0019] [Fixture body and fixture mounting part] The fixture body 110 is a main body of the lighting fixture 100. The fixture body 110 has a circular outer shape in a plan view. As shown in Fig. 2, the fixture body 110 is a disk-shaped member made of sheet metal such as an aluminum plate or a steel plate. For example, a white paint having high light reflectance is applied or a reflective metal material is vapor-deposited on the surface of the fixture body 110 on which the light-emitting module 10 and the like are arranged.

[0020] A circular opening is formed in the center of the fixture body 110. A substantially cylindrical support part 119 is disposed extending from the periphery of the opening towards the light emitting module 10. The support part 119 is a member formed of, for example, resin, and has a structure that allows it to be fitted into the fixture attachment part 90.

[0021] The fixture attachment part 90 is an example of an attachment member disposed in the center of the fixture main body 110. The fixture attachment part 90 is detachably attached to a ceiling-side attachment member 9 installed on the ceiling 4. In other words, the fixture main body 110 is detachably attached to the ceiling 4 via the fixture attachment part 90.

[0022] In the fixture body 110, a step portion 118 is formed around the support portion 119, and a mounting surface portion 112 is formed further outside the step portion 118. The mounting surface portion 112 has a circular outer shape in a plan view. The substrate 11 of the light-emitting module 10 is mounted on the mounting surface portion 112. A peripheral portion 113 that protrudes in the positive direction of the Z axis from the mounting surface portion 112 is formed around the mounting surface portion 112. When the light-emitting module 10 is attached to the fixture body 110, the rear surface 11b of the substrate 11 contacts the mounting surface portion 112, and the leads of the circuit component 81 protruding from the rear surface 11b of the substrate 11 are housed in the space within the step portion 118.

[0023] [Light emitting module] 2, the light emitting module 10 includes a substrate 11, a plurality of light emitting elements 21 arranged on a main surface 11a of the substrate 11, and a plurality of circuit components 81 arranged on the substrate 11. The substrate 11 is a so-called printed circuit board on which metal wiring is patterned, and in this embodiment, a resin substrate having a conductor pattern (metal wiring) on ​​one side is used as the substrate 11. The surface of the substrate 11 on which the conductor pattern is formed is referred to as the main surface 11a, and the surface opposite to the main surface 11a is referred to as the back surface 11b. Examples of such substrates include a glass epoxy substrate and a composite substrate epoxy resin substrate (CEM-3), etc.

[0024] Each of the light-emitting elements 21 in this embodiment is, for example, an LED element in which an LED chip is packaged. That is, the mounting structure of the light-emitting module 10 is an SMD (Surface Mount Device) structure in which an LED element in which an LED chip is packaged is mounted on the main surface 11a of the substrate 11.

[0025] The plurality of light-emitting elements 21 include two or more types of light-emitting elements that emit light with different color temperatures. The plurality of light-emitting elements 21 include, for example, a light-emitting element with a high color temperature (e.g., 6500K) and a light-emitting element with a low color temperature (e.g., 2700K). The light emission of the light-emitting element with the high color temperature and the light-emitting element with the low color temperature are controlled independently. This enables dimming and color adjustment.

[0026] The multiple light-emitting elements 21 are connected in series, for example, with each light-emitting element being of the same type. Alternatively, multiple groups (light-emitting element groups) of n (n is an integer of 2 or more) light-emitting elements 21 connected in series may be formed, and these multiple light-emitting element groups may be connected in parallel. Note that all of the multiple light-emitting elements 21 may be light-emitting elements of the same type. The specific configuration of the light-emitting module 10, such as the shape of the substrate 11 and the arrangement of the light-emitting elements 21, will be described later.

[0027] A plurality of circuit components 81 are arranged in a region (circuit region 14 shown in FIG. 5) in the central portion (peripheral portion of the opening 12) of the substrate 11 in a plan view, and these plurality of circuit components 81 constitute a power supply circuit 80 that supplies power for light emission to the plurality of light-emitting elements 21. The power supply circuit 80 converts AC power supplied via a cable (not shown) extending from the fixture body 110, for example, into DC power suitable for the light emission of the plurality of light-emitting elements 21 and supplies the converted power. As a result, the plurality of light-emitting elements 21 (light-emitting section 20) emit light. Each of the plurality of circuit components 81 that constitute the power supply circuit 80 is, for example, a capacitance element such as an electrolytic capacitor or a ceramic capacitor, a resistance element, a coil element, a choke coil (choke transformer), a noise filter, and a semiconductor element such as a diode or an integrated circuit element.

[0028] In this manner, the power supply circuit 80 and the ring-shaped light-emitting unit 20 arranged to surround the power supply circuit 80 are arranged on the main surface 11a of the substrate 11. In this embodiment, the night light 30 is further arranged on the main surface 11a of the substrate 11 between the power supply circuit 80 and the light-emitting unit 20. The night light 30 is, for example, an LED element having a configuration similar to that of the light-emitting element 21. The color temperature of the light emitted by the night light 30 is, for example, an incandescent color, but may also be a daylight color. In addition, a bullet-shaped LED may be used as the night light 30. On the front side (the Z-axis positive direction side) of the night light 30, an insulating cover 45 shown in FIG. 2 and a part of the optical member 60 described later are arranged.

[0029] [Reflective sheet] The reflective sheet 40 is disposed between the light emitting module 10 and the optical member 60. The reflective sheet 40 reflects light that travels directly or indirectly from the multiple light emitting elements 21 toward the reflective sheet 40. A specific configuration of the reflective sheet 40 will be described later.

[0030] [Circuit cover] The circuit cover 50 is a member that covers a plurality of circuit components 81 (power supply circuits 80) arranged on the substrate 11. In this embodiment, the circuit cover 50 is made of a metal such as iron or aluminum, and is non-flammable. An insulating sheet made of, for example, resin may be arranged on the inner surface of the circuit cover 50. This allows the inner surface of the circuit cover 50 to be closer to the circuit components 81 inside the circuit cover 50, and as a result, the height (width in the Z-axis direction) of the circuit cover 50 can be reduced. Furthermore, the circuit cover 50 may be made of, for example, a flame-retardant resin instead of a metal. This allows, for example, the circuit cover 50 to be made smaller or lighter.

[0031] In this embodiment, the circuit cover 50 is attached to the fixture body 110 together with the optical member 60 and the light emitting module 10 by, for example, a plurality of screws (not shown).

[0032] [Optical components] 2, the optical member 60 is a light-emitting unit cover that covers the light-emitting unit 20 of the light-emitting module 10. The optical member 60 is formed using a translucent (e.g., transparent) resin material such as a transparent acrylic resin. In a plan view, the optical member 60 has a circular outer shape with a hole (opening 64) in the center, that is, has a shape generally called a doughnut shape.

[0033] The optical member 60 has a plurality of lenses 61. The plurality of lenses 61 are provided in one-to-one correspondence with the plurality of light-emitting elements 21. The lenses 61, for example, expand the light distribution angle of the light from the corresponding light-emitting element 21. That is, the lenses 61 have a function of diverging light. In this way, by arranging the lenses 61 in correspondence with each of the light-emitting elements 21, for example, it is possible to precisely control the diffusion of light from each of the plurality of light-emitting elements 21. The specific shape of the plurality of lenses 61 will be described later with reference to FIG. 7 and FIG. 8.

[0034] [Lighting cover] The lighting cover 70 is an example of a diffusion cover, and is attached to the fixture body 110 to cover the main surface 11a of the light-emitting module 10. Specifically, the lighting cover 70 is a member that covers the side of the fixture body 110 on which the light-emitting module 10 and the like are attached, and is made of a translucent resin. The lighting cover 70 is also called a globe. The lighting cover 70 is made of, for example, a milky white resin, and can diffuse the light from each light-emitting element 21 and emit it to the outside.

[0035] The lighting cover 70 has a circular outer shape in a plan view. The lighting cover 70 is attached to the fixture body 110 in a freely detachable manner. In this embodiment, a circular decorative plate 71 corresponding to the outer shape (circular shape) of the lighting cover 70 in a plan view is attached to the outer periphery of the lighting cover 70. The decorative plate 71 is fixed to the lighting cover 70 by a plurality of screws (not shown) or the like. The lighting cover 70 is attached to and detached from the fixture body 110 with the decorative plate 71 fixed.

[0036] [Specific configuration of the light-emitting module] Next, a specific configuration of the light-emitting module 10 will be described with reference to FIGS.

[0037] Fig. 3 is a perspective view showing the structural relationship between the light emitting module 10 and the optical member 60 according to the present embodiment. Fig. 4 is a plan view of the light emitting module 10 according to the present embodiment. Fig. 5 is a plan view showing each region of the light emitting module 10 according to the present embodiment. Fig. 6 is an enlarged plan view of region VI in Fig. 4.

[0038] The outer shape of the substrate 11 in plan view is polygonal. More specifically, the outer shape of the substrate 11 in plan view is rectangular.

[0039] Here, "rectangular" includes a shape in which the tips of the four corners of a rectangle (quadrant) are cut off. In other words, "rectangular" does not only mean a rectangle (rectangle or square) in the strict sense, but also includes a shape in which at least one side is cut out or at least one vertex is chamfered. The outer shape of substrate 11 has three or more straight line portions (sides).

[0040] 4 and 5, substrate 11 includes four sides 17 and four corners 18. In the present embodiment, substrate 11 has a square shape in a plan view, and the lengths of the four sides 17 are equal to each other. For example, length x1 of side 17 extending in the X-axis direction is equal to length y1 of side 17 extending in the Y-axis direction.

[0041] Corner portion 18 is a part of the outer periphery of substrate 11 in plan view, other than the four sides 17. For example, corner portion 18 is formed by cutting out the corners (portions including the vertices) of a square. In this embodiment, corner portion 18 is a gently curved line that connects the ends of two adjacent sides 17. Corner portion 18 may also be a straight line. In this case, the outer shape of substrate 11 in plan view is an octagon, but is considered to be a "square shape" in this specification.

[0042] For example, the length of corner 18 in the X-axis direction is x2, and the length in the Y-axis direction is y2. In this case, x2 is 1 / 2 or less of x1. This makes it possible to maximize the proportion of side 17 in the X-axis direction of substrate 11 when corners 18 of the same size are provided at both ends of side 17. x2 may be 1 / 3 or less of x1, or 1 / 4 or less of x1. Similarly, with respect to y2 and y1, y2 may be 1 / 2 or less of y1, 1 / 3 or less of y1, or 1 / 4 or less of y1.

[0043] The four corners 18 may include corners having different sizes and shapes. The four corners 18 may be vertices of a rectangle. That is, the outer shape of the substrate 11 in a plan view may be rectangular.

[0044] A circular opening 12 is formed in the center of the substrate 11 and is centered on the central axis J of the lighting fixture 100. The opening 12 is a through hole into which the support part 119 of the fixture body 110 is inserted.

[0045] As shown in Figures 4 and 5, main surface 11a of substrate 11 is divided into a light-emitting region 13 which is a mounting region for light-emitting element 21, and a circuit region 14 which is a mounting region for circuit components 81. The dashed lines shown in Figures 4 and 5 indicate a boundary 15 between light-emitting region 13 and circuit region 14. Light-emitting region 13 is an annular region outside boundary 15, and is a region where light-emitting element 21 can be mounted. In other words, light-emitting region 13 is a mounting region for light-emitting element 21. Circuit region 14 is a rounded rectangular region inside boundary 15.

[0046] The boundary 15 includes four straight line portions 15a along each side 17 of the substrate 11, and four arcuate portions 15b connecting the ends of the four straight line portions 15a. Each of the four straight line portions 15a is shorter than the corresponding side 17. Each of the four arcuate portions 15b corresponds to ¼ of a circumference (i.e., a central angle of 90 degrees). The curvature of the arcuate portions 15b is smaller than the curvature of the corners 18. The boundary 15 corresponds to the outer shape of the circuit cover 50, for example.

[0047] 5, the light emitting region 13 includes a first region 13a, a second region 13b, and a third region 13c. The first region 13a, the second region 13b, and the third region 13c are each shaded differently. The boundaries between the regions are indicated by dashed lines.

[0048] The first region 13a is a region along the side 17 of the substrate 11. Specifically, the first region 13a is a rectangular region having the straight line portion 15a and a part of the side 17 as two opposing sides.

[0049] The second region 13b is closer to the corner 18 of the substrate 11 than the first region 13a. In a plan view, the second region 13b is a region sandwiched between two dashed dotted lines connecting the central axis J and both ends of the corner 18. Specifically, the second region 13b is a region surrounded by the two dashed dotted lines, the corner 18, and the arc portion 15b.

[0050] The third region 13c is a region located between the first region 13a and the second region 13b.

[0051] In this embodiment, the plurality of light-emitting elements 21 are arranged in multiple rings centered on the opening 12 of the substrate 11. The number of columns of the light-emitting elements 21 is different in each of the first region 13a, the second region 13b, and the third region 13c. The arrangement of the light-emitting elements 21 will be described below with reference to FIG. 6. Note that the dashed dotted line shown in FIG. 6 is the same as the dashed dotted line shown in FIG. 5, and is a boundary line dividing the first region 13a, the second region 13b, and the third region 13c.

[0052] As shown in FIG. 6, the plurality of light emitting elements 21 include a plurality of first light emitting elements 211, a plurality of second light emitting elements 212, a plurality of third light emitting elements 213, and a plurality of fourth light emitting elements 214.

[0053] The multiple first light emitting elements 211 are arranged in a ring shape along the outer shape of the substrate 11 to form a first element row 201. The first element row 201 is an element row located at the outermost periphery of the multiple element rows arranged in multiple ring shapes. As shown in Fig. 6, the multiple first light emitting elements 211 are arranged linearly along the side 17 in the first region 13a and the third region 13c. The multiple first light emitting elements 211 are arranged approximately linearly along the corner 18 in the second region 13b.

[0054] The second light-emitting elements 212 are arranged in a ring shape inside the first element row 201 to form a second element row 202. The second element row 202 is an element row located on the innermost circumference among the multiple element rows arranged in multiple ring shapes. As shown in Fig. 6, the second light-emitting elements 212 are arranged linearly along the straight line portion 15a of the boundary 15 in the first region 13a. The second light-emitting elements 212 are arranged in an arc shape along the arc portion 15b of the boundary 15 in the second region 13b and the third region 13c.

[0055] In this embodiment, the distance between the first element row 201 and the second element row 202 is larger in the second region 13b than in the first region 13a. For example, as shown in Fig. 6, the distance P2 in the second region 13b is larger than the distance P1 in the first region 13a.

[0056] The interval P1 is the shortest center-to-center distance between the first light-emitting element 211 and the second light-emitting element 212 arranged in the first region 13a in a planar view. Similarly, the interval P2 is the shortest center-to-center distance between the first light-emitting element 211 and the second light-emitting element 212 arranged in the second region 13b in a planar view.

[0057] The plurality of third light-emitting elements 213 are disposed in the second region 13b between the first element row 201 and the second element row 202. Specifically, the plurality of third light-emitting elements 213 constitute a third element row 203 and a fourth element row 204.

[0058] The third element row 203 is an element row extending along the arrangement direction of the multiple first light emitting elements 211. In the present embodiment, the multiple third light emitting elements 213 constituting the third element row 203 are arranged in an arc shape. The third element row 203 includes four light emitting elements 213, but the number is not particularly limited.

[0059] The fourth element row 204 is an element row extending in the arrangement direction of the plurality of second light emitting elements 212 between the third element row 203 and the second element row 202. In the present embodiment, the plurality of third light emitting elements 213 constituting the fourth element row 204 are arranged in an arc shape. The fourth element row 204 includes three light emitting elements 213, but the number is not particularly limited.

[0060] The multiple fourth light-emitting elements 214 are arranged between the first element row 201 and the second element row 202 in the third region 13c. The multiple fourth light-emitting elements 214 constitute a fifth element row 205. The multiple fourth light-emitting elements 214 constituting the fifth element row 205 are arranged in a straight line extending in a diagonal direction with respect to the side 17. The fifth element row 205 includes three light-emitting elements 214, but the number is not particularly limited and may be only one.

[0061] Thus, in the light-emitting module 10 according to the present embodiment, the light-emitting elements 21 are arranged in two rows in the first region 13a along the side 17 of the substrate 11. In the third region 13c, the light-emitting elements 21 are arranged in three rows. In the second region 13b closer to the corner 18 of the substrate 11, the light-emitting elements 21 are arranged in four rows. In this way, the light-emitting elements 21 are arranged more densely in the region closer to the corner 18. This makes it possible to enlarge the lamp image of the lighting fixture 100.

[0062] [Specific configuration of optical components] Next, a specific configuration of the optical member 60 will be described with reference to FIGS.

[0063] Fig. 7 is a plan view of the optical member 60 according to the present embodiment. Fig. 8 is a cross-sectional view of the lighting device 100 taken along the line VIII-VIII in Fig. 7. Note that Fig. 8 shows a simplified view of a portion of the cross section of the lighting device 100, and does not show any components other than the device body 110, the optical member 60, the light-emitting module 10, and the circuit cover 50.

[0064] 3 and 7, the optical member 60 according to this embodiment has a plurality of lenses 61. Each of the plurality of lenses 61 corresponds one-to-one to a plurality of light-emitting elements 21 arranged on the main surface 11a of the substrate 11. For example, when focusing on one light-emitting element 21 (light-emitting element 21a in FIG. 3) of the plurality of light-emitting elements 21, one of the lenses 61 (lens 61a in FIG. 3) is arranged in front of the light-emitting element 21 (positive direction of the Z axis). Light emitted by the light-emitting element 21a is diffused by the lens 61a and emitted forward (positive direction of the Z axis).

[0065] The lens 61 having such an optical function is disposed at a position facing each of the plurality of light-emitting elements 21 arranged in a multiple ring shape in the Z-axis direction. That is, the plurality of lenses 61 are arranged in a multiple ring shape like the plurality of light-emitting elements 21, as shown in FIG.

[0066] The optical member 60 has a circular outer shape in a plan view. The outer shape of the optical member 60 in a plan view is substantially the same as the outer shape of the mounting surface portion 112 of the device body 110. Specifically, the optical member 60 has a plurality of planar portions 65. The plurality of planar portions 65 are provided so as to protrude outward beyond the plurality of lenses 61 in a plan view.

[0067] 8, an air layer is provided between the flat portion 65 and the device body 110. In other words, at least a part of the back surface 66 of the flat portion 65 is not in contact with the substrate 11 and the mounting surface portion 112 of the device body 110.

[0068] As indicated by the dashed arrow in Fig. 8, a portion of the light emitted from the light-emitting element 21 travels inside (within the thickness of) the planar portion 65. The light that travels inside the planar portion 65 is guided inside the planar portion 65 while repeatedly being totally reflected at each of the back surface 66 and the front surface 67. A portion of the light inside the planar portion 65 is emitted from the front surface 67, contributing to improving the light extraction efficiency. With this configuration, the light is not absorbed on the surface of the fixture body 110, as compared to when it is reflected on the surface (mounting surface portion 112) of the fixture body 110, and therefore the light extraction efficiency can be improved.

[0069] As described above, the optical member 60 and the substrate 11 are fixed to the device body 110 together with the circuit cover 50 by a plurality of screws or the like. A configuration for restricting the optical member 60 and the substrate 11 to the correct position relative to the device body 110 during this fixing operation is provided on the device body 110 or the like. Specifically, as shown in FIG. 2, the device body 110 has a restricting protrusion 115. The substrate 11 is provided with a cutout portion 19 (see FIGS. 3 and 4) into which the restricting protrusion 115 is inserted. Furthermore, the optical member 60 is formed with a recess 68 (see FIGS. 3 and 7) into which the restricting protrusion 115 is inserted. The recess 68 is formed in a concave shape in a direction away from the substrate 11 on the surface facing the substrate 11 (the surface on the negative Z-axis direction side).

[0070] That is, in this embodiment, the restricting protrusion 115 engages with the notch 19 of the substrate 11 and the recess 68 of the optical member 60. Furthermore, there are two such sets of the restricting protrusion 115, the notch 19, and the recess 68. This determines the positions and attitudes of the optical member 60 and the substrate 11 relative to the device body 110 to be normal positions and attitudes.

[0071] [Specific composition of the reflective sheet] Next, a specific configuration of the reflective sheet 40 will be described with reference to FIG.

[0072] The reflective sheet 40 is disposed between the substrate 11 and the optical member 60 of the light-emitting module 10. The reflective sheet 40 is a sheet-like member made of, for example, resin, and reflects light that travels directly and indirectly from the light-emitting elements 21 toward the reflective sheet 40.

[0073] Specifically, as shown in FIG. 3, the reflection sheet 40 has a plurality of through holes 41 formed therein, which expose each of the plurality of light-emitting elements 21 to the side of the optical member 60. For example, when the reflection sheet 40 is disposed along the main surface 11a of the substrate 11 of the light-emitting module 10, the light-emitting element 21a in FIG. 3 is inserted into the through hole 41 (the through hole 41a in FIG. 3) located at a position facing each other in the Z-axis direction. That is, when viewed from the front (Z-axis positive direction), the light-emitting element 21a is exposed from the reflection sheet 40, and the light emitted from the light-emitting element 21a is directed toward the optical member 60 without being blocked by the reflection sheet 40. Also, the light directed directly and indirectly from the light-emitting element 21a toward the reflection sheet 40 is reflected by the reflection sheet 40 and directed toward the optical member 60. That is, the reflection sheet 40 suppresses the loss of light between the light-emitting element 21a and the optical member 60. Furthermore, the reflective sheet 40 has a plurality of through holes 41 through which the plurality of light emitting elements 21 are exposed, and the above-mentioned effect of suppressing light loss can be obtained for each of the plurality of light emitting elements 21.

[0074] In addition, in this embodiment, the reflection sheet 40 is formed with a plurality of through holes 41 such that each of the plurality of light-emitting elements 21 can be inserted into the through hole 41 regardless of the rotation position when the reflection sheet 40 is rotated 90° around the Z axis from the posture shown in Fig. 3. Furthermore, the reflection sheet 40 can be placed on the substrate 11 without distinguishing between the front and back. In other words, the plurality of through holes 41 are formed such that each of the plurality of light-emitting elements 21 can be inserted into the through hole 41 even when the reflection sheet 40 is rotated (flipped) 180° around the X axis or the Y axis from the posture shown in Fig. 3.

[0075] In addition, the multiple light-emitting elements 21 are not arranged at positions rotationally symmetrical at every 90° around the center of the substrate 11 in a plan view due to the convenience of the layout of the wiring connected to the multiple light-emitting elements 21 or the arrangement position of the notch 19 of the substrate 11. Therefore, the positions of the multiple through holes 41 corresponding one-to-one to the multiple light-emitting elements 21 are also not rotationally symmetrical at every 90°. Therefore, for example, assume that the reflection sheet 40 has the through holes 41 only at positions corresponding to the multiple light-emitting elements 21. In this case, there is only one rotational position at which the reflection sheet 40 can be arranged on the substrate 11 without any problems. Therefore, the work of adjusting the reflection sheet 40, which is recognized as being rotationally symmetrical at every 90° due to its rectangular outer shape, to the correct rotational position with respect to the fixture body 110 may become complicated.

[0076] Therefore, the reflection sheet 40 is provided with through holes 41 in a number greater than the number of light-emitting elements 21 arranged on the substrate 11. In other words, in plan view, there are through holes 41 in which no light-emitting elements 21 are arranged. More specifically, the number and positions of the multiple through holes 41 are determined so that when the reflection sheet 40 is rotated 90° around the center in plan view, all of the light-emitting elements 21 arranged on the substrate 11 are exposed at any rotation position.

[0077] Furthermore, when both sides of the reflection sheet 40 in the thickness direction (Z-axis direction) are the same color, it is not easy to determine the front and back of the reflection sheet 40. Therefore, the number and positions of the multiple through holes 41 are determined so that when the reflection sheet 40 is inverted around the X-axis or Y-axis, all of the light-emitting elements 21 arranged on the substrate 11 are exposed, regardless of whether the reflection sheet 40 is inverted before or after the inversion. As a result, when the reflection sheet 40 is arranged to cover the substrate 11 in the process of assembling the lighting device 100, it can be arranged without worrying about the rotation position and front and back of the reflection sheet 40. This contributes to the efficiency of assembling (manufacturing) the lighting device 100.

[0078] [Effects, etc.] As described above, the lighting device 100 according to the present embodiment includes the device body 110, the substrate 11 attached to the device body 110, and the light-emitting module 10 having the plurality of light-emitting elements 21 arranged on the main surface 11a of the substrate 11. The substrate 11 has a polygonal outer shape in a plan view. The plurality of light-emitting elements 21 are arranged in a ring shape along the outer shape of the substrate 11 and include a plurality of first light-emitting elements 211 constituting the first element row 201, a plurality of second light-emitting elements 212 arranged in a ring shape inside the first element row 201 and constituting the second element row 202, and a plurality of third light-emitting elements 213 arranged between the first element row 201 and the second element row 202. The main surface 11a includes a first region 13a along the side 17 of the substrate 11 and a second region 13b closer to the corner 18 of the substrate 11 than the first region 13a. The distance between the first element row 201 and the second element row 202 is greater in the second region 13b than in the first region 13a. A plurality of third light emitting elements 213 are disposed in the second region 13b.

[0079] As a result, since the outer shape of the substrate 11 is polygonal, more substrates 11 can be taken out of one large substrate compared to a circular substrate. This reduces waste of substrate 11. Also, since the third light-emitting element 213 is arranged in the second region 13b close to the corner 18, the number of light-emitting elements 21 arranged in the second region 13b can be increased. This makes the lamp image of the lighting device 100 appear larger. The lamp image corresponds to the apparent light-emitting range when the lighting device 100 is viewed from the front.

[0080] Fig. 9 is a diagram showing a lamp image of lighting fixture 100 according to this embodiment. In Fig. 9, the dashed circle represents the size of a circular substrate having the same mounting area as the mounting area of ​​light emitting elements 21 on rectangular substrate 11. According to this embodiment, many light emitting elements 21 are arranged near corners 18 of substrate 11, thereby increasing the luminance in the vicinity of corners 18. As a result, as shown in Fig. 9, a larger lamp image can be obtained than that of a circular substrate having the same mounting area.

[0081] Furthermore, for example, in the second region 13b, the multiple third light-emitting elements 213 form a third element row 203 extending along the arrangement direction of the multiple first light-emitting elements 211, and a fourth element row 204 extending along the arrangement direction of the multiple second light-emitting elements 212 between the third element row 203 and the second element row 202.

[0082] This allows a larger number of light emitting elements 21 to be arranged in second region 13b, making the lamp image of lighting fixture 100 appear larger.

[0083] Furthermore, for example, the main surface 11a includes a third region 13c located between the first region 13a and the second region 13b. The plurality of light-emitting elements 21 includes a fourth light-emitting element 214 disposed between the first element row 201 and the second element row 202 in the third region 13c.

[0084] This makes it possible to reduce the difference in the number of light-emitting elements 21 between the first region 13a and the second region 13b in the third region 13c. In other words, it is possible to prevent the difference in the amount of light between the first region 13a and the second region 13b from becoming too large, thereby increasing the uniformity.

[0085] Furthermore, for example, the multiple second light emitting elements 212 are arranged in an arc shape in the second region 13b.

[0086] This makes it possible to increase the amount of light toward the center of lighting fixture 100, thereby increasing the degree of uniformity.

[0087] Furthermore, for example, the lighting device 100 includes an optical member 60 that is disposed on the main surface 11a side of the light-emitting module 10 and has a plurality of lenses 61 that correspond one-to-one to the plurality of light-emitting elements 21.

[0088] This makes it possible to control the light distribution of each light-emitting element 21 by the lens 61 provided for each light-emitting element 21. This makes it possible to enlarge the lamp image and improve the uniformity.

[0089] Furthermore, for example, the lighting fixture 100 includes a light-transmitting lighting cover 70 that is attached to the fixture body 110 and covers the main surface 11a of the light-emitting module 10. The lighting cover 70 has a circular outer shape in a plan view.

[0090] This allows the circular lamp image to match the shape of the lighting cover 70, thereby improving the uniformity on the light exit surface of the lighting cover 70.

[0091] Moreover, for example, the outer shape of the instrument body 110 in a plan view is circular.

[0092] This makes it possible to easily attach, for example, a circular lighting cover 70.

[0093] Moreover, for example, the outer shape of the substrate 11 in a plan view is rectangular.

[0094] This allows a larger number of substrates 11 to be produced, and reduces waste of substrates 11. For example, multiple rectangular substrates 11 can be arranged in a tessellated manner. In other words, it becomes possible to produce a large number of substrates 11 from one large substrate, and the only parts that may be wasted are essentially the cut-off portions at corners 18. This allows for a greater reduction in waste of substrates 11 compared to circular substrates.

[0095] Moreover, for example, the light emitting module 10 further includes a power supply circuit 80 that is disposed on the substrate 11 and supplies power for the plurality of light emitting elements 21 to emit light.

[0096] This allows the light emitting element 21 and the power supply circuit 80 to be incorporated into one substrate 11, thereby simplifying the manufacturing process. For example, the lighting device 100 can be easily assembled.

[0097] Furthermore, for example, the lighting fixture 100 includes a fixture attachment part 90 that is disposed in the center of the fixture body 110 and detachably attaches the fixture body 110 to a ceiling. The first element row 201 and the second element row 202 both surround the fixture attachment part 90 in a plan view.

[0098] This allows a large number of light emitting elements 21 to be arranged on a wide main surface, such as a ceiling light, to form a large lamp image and illuminate the entire space.

[0099] (others) Although the lighting fixture according to the present invention has been described based on the above-mentioned embodiment, the present invention is not limited to the above-mentioned embodiment.

[0100] For example, in the above embodiment, the light-emitting elements 213 are arranged in two element rows in the second region 13b, but only one element row may be arranged. Also, the fourth light-emitting element 214 may not be arranged in the third region 13c. For example, the light-emitting elements 21 may be arranged in two rows in the first region 13a and the third region 13c, and the light-emitting elements 21 may be arranged in three rows in the second region 13b.

[0101] Also, for example, the outer shape of the optical member 60 does not have to be circular. Fig. 10 is a plan view of a lighting fixture 100A according to a modified example with the lighting cover 70 and the circuit cover 50 removed. As shown in Fig. 10, the outer shape of the optical member 60A according to this modified example is rectangular. Specifically, the outer shape of the optical member 60A approximately matches the outer shape of the light-emitting module 10 (substrate 11).

[0102] In this modification, as shown in Fig. 10, the outer shape of the mounting surface 112 in a plan view is circular. Therefore, since the mounting surface 112 is circular while the substrate 11 is polygonal, an empty space is formed on the mounting surface 112 where the substrate 11 is not placed. The empty space can be used to arrange a circuit component 90A such as a switch, a sensor, or a power supply circuit. Alternatively, instead of or in addition to the circuit component 90A, an information display unit such as a two-dimensional code may be arranged.

[0103] In addition, for example, a rectangular substrate 11 with the tips of the four corners cut off has been exemplified as the substrate 11 of the light-emitting module 10, but the outer shape of the substrate 11 of the light-emitting module 10 in a planar view is not limited to this. For example, the outer shape of the substrate 11 in a planar view may be a polygonal shape other than a rectangle, such as a triangular shape or a pentagonal shape.

[0104] Furthermore, the substrate (module substrate) on which the multiple light-emitting elements 21 are arranged in the light-emitting module 10 does not have to be a single physical substrate like the substrate 11 according to the embodiment. For example, a single module substrate may be formed by connecting multiple substrates, each of which has one or more light-emitting elements 21 arranged thereon. For example, depending on the size required for the module substrate, it may be determined whether the module substrate is realized by a single substrate or by multiple substrates.

[0105] Furthermore, the substrate 11 of the light-emitting module 10 may be of a type other than the glass epoxy substrate and the composite substrate epoxy resin substrate (CEM-3) exemplified in the above embodiment. For example, a metal-based substrate made of a metal material with a resin-coated surface may be used. In this case, for example, heat from the plurality of light-emitting elements 21 and the plurality of circuit components 81 arranged on the main surface 11a of the substrate 11 is efficiently conducted to the fixture body 110 via the substrate 11.

[0106] Furthermore, power supply circuit 80, which supplies power for light emission to light-emitting unit 20, may be formed of a plurality of circuit components arranged on a board separate from board 11. Furthermore, power supply circuit 80 may be arranged outside lighting device 100. For example, power supply circuit 80 may be housed in a power supply box that supplies DC power to lighting device 100. This allows lighting device 100 to be made smaller and lighter, for example.

[0107] Furthermore, one or more circuit components 81 arranged on substrate 11 may form a different type of electric circuit (electronic circuit) from power supply circuit 80. For example, the one or more circuit components 81 may form a control circuit that controls dimming or color adjustment of multiple light-emitting elements 21 in accordance with a signal transmitted from outside lighting device 100. Furthermore, power supply circuit 80 may include the control circuit.

[0108] In addition, the light emitting element 21 is an SMD type LED element, but is not limited to this. For example, the light emitting module 10 may have a COB (Chip On Board) structure in which LED chips are directly mounted on the substrate 11. In this case, the LED chips mounted on the substrate 11 are collectively or individually sealed with a sealing member containing a wavelength conversion material, thereby making it possible to obtain illumination light with a predetermined color temperature.

[0109] In the above-described embodiment and modified example, an LED element in which an LED chip is packaged has been exemplified as the light-emitting element 21. However, a semiconductor light-emitting element such as a semiconductor laser, or another type of solid-state light-emitting element such as an organic EL (Electro Luminescence) or inorganic EL element may be adopted as the light-emitting element 21.

[0110] Furthermore, for example, the lighting fixture 100 may not include any components other than the fixture body 110 and the light-emitting module 10. For example, the lighting fixture 100 may not include the reflective sheet 40, the circuit cover 50, the optical member 60, the lighting cover 70, etc. The lighting fixture 100 may be realized as a lighting fixture other than a ceiling light.

[0111] In addition, the present invention also includes forms obtained by applying various modifications to each embodiment that a person skilled in the art may think of, and forms realized by arbitrarily combining the components and functions of each embodiment within the scope that does not deviate from the spirit of the present invention. [Explanation of symbols]

[0112] 11 Substrate 11a Main surface 13a 1st area 13b Second area 13c 3rd area 17 sides 18 Corner 21, 21a, 211, 212, 213, 214 Light-emitting element 60, 60A Optical components 61, 61a Lens 80 Power circuit 81, 90A Circuit Components 90 Equipment mounting part (mounting part) 100, 100A lighting fixtures 110 Equipment body 112 Placement surface section 201 First element row 202 Second element row 203 3rd Element Column 204 4th Element Array

Claims

1. The instrument body, A light-emitting module having a substrate attached to the device body and a plurality of light-emitting elements arranged on a main surface of the substrate, The substrate has a polygonal outer shape in a plan view, The plurality of light-emitting elements include A plurality of first light emitting elements arranged in a ring shape along an outer shape of the substrate and constituting a first element row; a plurality of second light emitting elements arranged in a ring shape inside the first element row and constituting a second element row; a plurality of third light-emitting elements disposed between the first element row and the second element row, The main surface is a first region along an edge of the substrate; a second region closer to the corner of the substrate than the first region; a distance between the first element row and the second element row is larger in the second region than in the first region; The third light-emitting elements are arranged in the second region. Lighting fixtures.

2. The third light emitting elements, in the second region, a third element row extending along an arrangement direction of the plurality of first light emitting elements; a fourth element row extending along an arrangement direction of the plurality of second light-emitting elements between the third element row and the second element row; 2. A lighting fixture according to claim 1.

3. the main surface includes a third region located between the first region and the second region, the plurality of light-emitting elements include a fourth light-emitting element disposed between the first element row and the second element row in the third region, 3. A lighting device according to claim 1 or 2.

4. The plurality of second light-emitting elements are arranged in an arc shape in the second region. A lighting fixture according to any one of claims 1 to 3.

5. an optical member disposed on the main surface side of the light emitting module and having a plurality of lenses corresponding one-to-one to the plurality of light emitting elements; A lighting fixture according to any one of claims 1 to 4.

6. Further, a light-transmitting diffusion cover is attached to the device body and covers a main surface of the light-emitting module, The outer shape of the diffusion cover in a plan view is circular. A lighting fixture according to any one of claims 1 to 5.

7. The outer shape of the instrument body in a plan view is circular. A lighting fixture according to any one of claims 1 to 6.

8. The device body has a mounting surface portion on which the substrate is placed, The outer shape of the mounting surface portion in a plan view is circular. A lighting fixture according to any one of claims 1 to 7.

9. The outer shape of the substrate in a plan view is rectangular. A lighting fixture according to any one of claims 1 to 8.

10. The light emitting module further includes a power supply circuit disposed on the substrate and configured to supply power for light emission of the plurality of light emitting elements. A lighting fixture according to any one of claims 1 to 9.

11. Further, a mounting member is provided at a center of the device body for detachably mounting the device body to a ceiling, both the first element row and the second element row surround the mounting member in a plan view; A lighting fixture according to any one of claims 1 to 10.

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