Lighting fixture and method for manufacturing lighting fixture

Abstract

To provide a lighting fixture that can provide a performance for acquiring imbalance, fluidity and liveliness.SOLUTION: A lighting fixture includes a light source unit 2. The light source unit 2 includes a plurality of LED elements 21. The light source unit 2 irradiates an irradiation surface with non-uniform luminance.SELECTED DRAWING: Figure 2

Description

[Technical field]

[0001] The present invention relates to a lighting fixture and a method for manufacturing the lighting fixture, and in particular to a lighting fixture including multiple light sources and a method for manufacturing the lighting fixture. [Background technology]

[0002] Patent Document 1 discloses an illumination device (lighting fixture) equipped with multiple light sources. In the illumination device of Patent Document 1, LEDs (LED elements) serving as light sources are arranged so that the light emission amount of the light source is symmetrical about the rotation axis of the cover of the illumination device. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] JP 2014-170712 A Summary of the Invention [Problem to be solved by the invention]

[0004] Recently, a lighting device has been used to control the brightness of an illumination surface and space illuminated by the lighting device to create a sense of imbalance, fluidity, and dynamism. However, the lighting device of Patent Document 1 may not be sufficient to provide a satisfactory effect.

[0005] The present disclosure aims to provide a lighting fixture that can create a sense of imbalance, fluidity, and dynamism, and a method for manufacturing the lighting fixture. [Means for solving the problem]

[0006] A lighting device according to an embodiment of the present disclosure includes a light source unit having a plurality of LED elements, and the luminance of an illumination surface illuminated by the light source unit is non-uniform.

[0007] A method for manufacturing a lighting device according to an aspect of the present disclosure includes a module manufacturing step and a module arranging step. In the module manufacturing step, a plurality of light source modules are manufactured by arranging a plurality of LED elements unevenly in at least one of the circumferential direction and radial direction of the arc on an arc-shaped substrate. In the module arranging step, the plurality of light source modules manufactured in the module manufacturing step are arranged in a circumferential shape.

[0008] A method for manufacturing a lighting device according to another aspect of the present disclosure includes a module manufacturing step and a module arranging step. In the module manufacturing step, a plurality of light source modules are manufactured by unevenly arranging a plurality of LED elements on a long substrate along a long axis direction of the substrate. In the module arranging step, the plurality of light source modules manufactured in the module manufacturing step are arranged side by side in a short axis direction of the substrate. Effect of the Invention

[0009] According to the lighting device and the method for manufacturing the lighting device according to one aspect of the present disclosure, it is possible to create a performance that creates a sense of imbalance, fluidity, and dynamism. [Brief description of the drawings]

[0010] [Figure 1] FIG. 1 is an exploded perspective view of a lighting fixture according to a first embodiment. [Diagram 2] FIG. 2 is a plan view of a light source unit in the lighting fixture of the above embodiment. [Diagram 3] FIG. 11 is a plan view of a light source unit in a lighting device according to a third embodiment. [Figure 4] 13 is a plan view of a light source unit in a lighting device according to a modified example of the third embodiment. FIG. [Diagram 5] FIG. 11 is a plan view of a light source unit in a lighting device according to a fourth embodiment. [Figure 6] FIG. 13 is a plan view of a light source unit in a lighting device according to a fifth embodiment. [Figure 7] FIG. 13 is a plan view of a light source unit in a lighting device according to a sixth embodiment. [Figure 8] 8 is a partial cross-sectional view of the light source unit in the lighting fixture of the above, corresponding to the X1-X1 cross section in FIG. 7. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0011] Hereinafter, lighting fixtures according to the first to sixth embodiments and their modifications will be described with reference to the drawings. Note that the drawings referred to in the following first to sixth embodiments and their modifications are all schematic drawings, and the ratios of sizes and thicknesses of the components in the drawings do not necessarily reflect the actual dimensional ratios.

[0012] (Embodiment 1) 1. Overall configuration of lighting fixture 1, the lighting fixture 100 according to the first embodiment includes a main body 1, a light source unit 2, and a cover 3. The lighting fixture 100 is attached to, for example, a ceiling.

[0013] Illumination device 100 is, for example, circular. Hereinafter, the direction in which illumination device 100 is attached to a ceiling is referred to as direction D1. In addition, in a plan view from direction D1, illumination device 100 is rotationally symmetric with respect to central axis A1 (see FIG. 2).

[0014] 2. Composition of each part of the lighting fixture (1) Body and cover The main body 1 is formed, for example, in a disk shape from a metal plate. A power supply unit that can be electrically and mechanically connected to a ceiling hook so as to be freely detachable is disposed in the center of the main body 1. The power supply unit has a function of converting AC supplied from a power line via the ceiling hook into DC supplied to the light source unit. The light source unit 2 is attached to the bottom surface of the main body 1. The light source unit 2 is a hollow disk shape centered on a central axis A1 (see FIG. 2).

[0015] The cover 3 is made of a translucent synthetic resin such as an acrylic resin or a polycarbonate resin and has a cylindrical shape with an open top. The cover 3 is detachably attached to the bottom surface of the main body 1 so as to store the light source unit 2 inside.

[0016] (2) Light source unit and light source module As shown in Fig. 2, the light source unit 2 includes a plurality of light source modules 20 (three in Fig. 2). Each of the light source modules 20 includes a plurality of LED elements 21 (24 in Fig. 2) and a mounting substrate 22 curved on an arc. Each of the plurality of LED elements 21 is, for example, a packaged type white LED for lighting. That is, the light source unit 2 includes a plurality of LED elements 21. The plurality of light source modules 20 are arranged on a circumference centered on the central axis A1.

[0017] The light source modules 20a to 20c each include the same number of LED elements 21, but the arrangement of the LED elements 21 is different.

[0018] (2.1) Circuit configuration of light source module The light source module 20 includes a plurality of LED elements 21. More specifically, the light source module 20 has a light-emitting circuit including a plurality of LED elements 21. The light-emitting circuit includes, for example, two or more series circuits connected in parallel. Each of the two or more series circuits includes two or more LED elements 21 connected in series. For example, the light-emitting circuit of the light source module 20b includes, for example, a series circuit 23a in which nine LED elements 21 are connected in series, a series circuit 23b in which eight LED elements 21 are connected in series, and a series circuit 23c in which seven LED elements 21 are connected in series. The series circuit 23a, the series circuit 23b, and the series circuit 23c are connected in parallel with each other.

[0019] Hereinafter, the above-mentioned connection state of the LED elements 21 in the light-emitting circuit of the light source module 20b is referred to as the circuit configuration of the light-emitting circuit of the light source module 20b. The light source modules 20a, 20b, and 20c have, for example, the same circuit configuration of the light-emitting circuit. That is, the light source modules 20a, 20b, and 20c have the same electrical characteristics of the light-emitting circuits. Here, the electrical characteristics of the light-emitting circuits of the multiple light source modules 20 being the same means that the multiple light source modules 20 are replaceable in the lighting fixture 100.

[0020] (2.2) LED element layout In the light source module 20, the LED elements 21 are arranged unevenly. Here, the LED elements 21 are arranged unevenly when the light source module 20 is divided into a plurality of regions AR1, AR2, and AR3 (three in the light source module 20a in FIG. 2) that have the same shape or area and do not overlap each other, each of the regions AR1 to AR3 includes at least one LED element 21, and the number of the LED elements 21 included in each of the regions AR1 to AR3 is not uniform. The regions AR1, AR2, and AR3 shown in FIG. 2 have the same shape and area. Here, dividing the light source module 20 into the regions AR1 to AR3 means providing the regions AR1 to AR3 so that any position in the light source module 20 belongs to any one of the regions AR1 to AR3. The regions AR1 to AR3 are arranged, for example, in a circumferential direction centered on the central axis A1. Here, the number of LED elements 21 included in each of the regions AR1, AR2, and AR3 is not uniform means that the number of LED elements 21 included in the region AR1 is different from at least one of the number of LED elements 21 included in the region AR2 and the number of LED elements 21 included in the region AR3. That is, in the light source module 20, when the light source module 20 is divided into a plurality of regions of the same shape each including one or more LED elements 21, the density of the LED elements 21 in at least one region is different from the density of the LED elements 21 in the other regions.

[0021] Moreover, in the light source module 20, the arrangement of the LED elements 21 does not have symmetry and periodicity. Here, in the light source module 20, the arrangement of the LED elements 21 does not have symmetry means that the arrangement of all the LED elements 21 in the light source module 20 is neither linearly symmetric nor rotationally symmetric, and does not exclude that a part of the arrangement of the LED elements 21 is linearly symmetric or rotationally symmetric. In other words, the arrangement of the LED elements 21 does not have symmetry means that a part of the arrangement of the LED elements 21 is allowed to be linearly symmetric or rotationally symmetric. Similarly, in the light source module 20, the arrangement of the LED elements 21 does not have periodicity means that the arrangement of all the LED elements 21 in the light source module 20 cannot be shown by repeating one pattern, and does not exclude that a part of the arrangement of the LED elements 21 has periodicity.

[0022] As a result, the LED elements 21 are arranged unevenly in the light source unit 2. This makes it possible to make the luminance of the surface illuminated by the light source unit 2 uneven. Therefore, by making the luminance of the space illuminated by the lighting device 100 uneven, it becomes possible to produce an effect that provides imbalance, fluidity, and dynamism.

[0023] A specific example in which the LED elements 21 are arranged non-uniformly will be described in more detail below.

[0024] For example, in the light source module 20, some of the LED elements 21 are arranged on imaginary arcs C1, C2, and C3 centered on the central axis A1. In addition, in the light source module 20, the remaining LED elements 21 are not located on any of the imaginary arcs C1, C2, and C3. As a result, in the light source module 20, when the light source module 20 is divided into multiple regions of the same shape including one or more LED elements 21, the density of the LED elements 21 in at least one region is different from the density of the LED elements 21 in the other regions.

[0025] Also, for example, the intervals between the LED elements 21 located on the virtual arc C1 are not uniform. In other words, in the LED elements 21 arranged on the virtual arc C1, the angle (hereinafter referred to as "central angle") formed by two line segments connecting each of two adjacent LED elements 21 in the extension direction of the virtual arc C1 to the central axis A1 is not constant. Similarly, the intervals between the LED elements 21 located on the virtual arc C2 are not uniform. Similarly, the intervals between the LED elements 21 located on the virtual arc C3 are not uniform. As a result, in the light source module 20, when the light source module 20 is divided into a plurality of regions of the same shape including one or more LED elements 21, the density of the LED elements 21 in at least one region is different from the density of the LED elements 21 in the other regions.

[0026] The light source modules 20a to 20c have different arrangements of the LED elements 21. Here, "the arrangements of the LED elements 21 are different between the two light source modules 20" means that there is at least one LED element 21 that does not overlap when the mounting boards 22 are overlapped in the two light source modules 20. One of the light source modules 20a to 20c corresponds to the first module, and the other of the light source modules 20a to 20c corresponds to the second module. This reduces the possibility that the arrangement of the multiple LED elements 21 in the light source unit 2 will have regularity, making it easier to make the arrangement of the LED elements 21 uneven. In addition, by changing the arrangement of the light source modules 20a to 20c in the light source unit 2, it is easy to realize a light source unit 2 in which the arrangement of the LED elements 21 is different.

[0027] 3. Manufacturing method of lighting fixtures A method for manufacturing the lighting device 100 will now be described.

[0028] The manufacturing method of the lighting fixture 100 includes a mounting board preparation step, a module manufacturing step, a module arrangement step, and a lighting fixture assembling step.

[0029] In the mounting substrate preparation step, a plurality of arc-shaped mounting substrates 22 are prepared.

[0030] In the module manufacturing step, a plurality of light source modules 20 are manufactured. Each of the plurality of light source modules 20 is manufactured by arranging a plurality of LED elements 21 unevenly in the circumferential and radial directions of the arc on an arc-shaped mounting substrate 22. More specifically, an arrangement pattern of the LED elements 21 that satisfies the following conditions (1) and (2) is used. (1) Two or more of the plurality of LED elements 21 are arranged on an arc centered on the central axis A1, and two or more of the plurality of LED elements 21 are not arranged on the arc. (2) In the plurality of LED elements 21 arranged in the circumferential direction centered on the central axis A1, the central angle between two adjacent LED elements 21 is not constant.

[0031] In the module manufacturing step, a plurality of (three in FIG. 2) LED arrangement patterns are used. In the module manufacturing step, for example, each of the three LED arrangement patterns is used to manufacture each of the light source modules 20a, 20b, and 20c. More specifically, in the module manufacturing step, a plurality of LED elements 21 are arranged on the mounting substrate 22 in the same manner as the light source module 20a in FIG. 2, to manufacture each of the plurality of light source modules 20a. Similarly, in the module manufacturing step, a plurality of LED elements 21 are arranged on the mounting substrate 22 in the same manner as the light source module 20b in FIG. 2, to manufacture each of the plurality of light source modules 20a. Similarly, in the module manufacturing step, a plurality of LED elements 21 are arranged on the mounting substrate 22 in the same manner as the light source module 20c in FIG. 2, to manufacture each of the plurality of light source modules 20c.

[0032] In the module arrangement step, a plurality of (three in FIG. 2) light source modules 20 are arranged in a circular shape. More specifically, the light source modules 20a, 20b, and 20c manufactured in the module manufacturing step are attached to the main body 1 one by one, thereby manufacturing the light source unit 2 attached to the main body 1.

[0033] In the lighting device assembling step, the power supply unit and the cover 3 are attached to the main body 1. More specifically, the power supply unit and the cover 3 are attached to the main body 1 to which the light source unit 2 is attached. In this manner, the lighting device 100 is manufactured.

[0034] 4.Effects The lighting fixture 100 according to the first embodiment includes a light source unit 2 having a plurality of LED elements 21. The luminance of the surface illuminated by the light source unit 2 is non-uniform. Therefore, it is possible to make the luminance of the space illuminated by the lighting fixture 100 non-uniform, and it is possible to produce an effect that provides imbalance, fluidity, and a sense of dynamism.

[0035] Moreover, in the lighting device 100 according to the first embodiment, the LED elements 21 are arranged non-uniformly. This allows the lighting device 100 to emit light non-uniformly from the light source unit 2, making it easy to make the luminance of the surface illuminated by the light source unit 2 non-uniform.

[0036] Moreover, in the lighting fixture 100 according to the first embodiment, the light source unit 2 includes a plurality of light source modules 20. Each of the plurality of light source modules 20 includes two or more LED elements among the plurality of LED elements 21. As a result, in the lighting fixture 100, by unevenly arranging the LED elements 21 in the light source modules 20, it becomes easy to unevenly arrange the plurality of LED elements 21 in the lighting fixture 100.

[0037] In the lighting fixture 100 according to the first embodiment, the plurality of light source modules 20 include a light source module 20a and a light source module 20b. The light source module 20a and the light source module 20b have different arrangements of two or more LED elements 21. This reduces the possibility that the arrangement of the plurality of LED elements 21 in the light source unit 2 will be irregular, and makes it easier to arrange the LED elements 21 unevenly.

[0038] Moreover, in the lighting fixture 100 according to the first embodiment, each of the plurality of light source modules 20 has a light-emitting circuit including some of the plurality of LED elements 21. The connection configuration of the light-emitting circuits in the plurality of light source modules 20 is the same. This makes it possible to replace the plurality of light source modules 20 in the light source unit 2 in the lighting fixture 100. Therefore, by changing the combination of the plurality of light source modules 20, the arrangement of the plurality of LED elements 21 in the light source unit 2 can be easily changed.

[0039] The manufacturing method of the lighting device 100 according to the first embodiment includes a module manufacturing step and a module arranging step. In the module manufacturing step, a plurality of light source modules 20 are manufactured by arranging a plurality of LED elements 21 unevenly in at least one of the circumferential direction and radial direction of the arc on an arc-shaped mounting substrate 22. In the module arranging step, a plurality of light source modules 20 manufactured in the module manufacturing step are arranged circumferentially. As a result, the LED elements 21 are unevenly arranged in the light source module 20, and therefore it becomes easy to make the arrangement of the LED elements 21 uneven in the lighting device 100. In addition, by manufacturing a plurality of types of light source modules 20 having different arrangements of the LED elements 21 from each other in the module manufacturing step, it becomes easy to manufacture a plurality of types of lighting devices 100 having different arrangements of the LED elements 21.

[0040] (Embodiment 2) 1. Configuration In the lighting fixture 100 according to the first embodiment, the light source modules 20 included in the light source unit 2 have different LED arrangement patterns.

[0041] In contrast, in the lighting fixture 100 according to the second embodiment, the light source unit 2 includes a plurality of light source modules 20 having the same LED arrangement pattern.

[0042] In one example of the lighting fixture 100 according to the second embodiment, the light source unit 2 includes one light source module 20a and two light source modules 20b. Even in this case, the LED elements 21 are arranged unevenly in each of the light source module 20a and the light source module 20b. Therefore, in the light source unit 2, the LED elements 21 are arranged unevenly.

[0043] Similarly, in one example of the lighting device 100 according to the second embodiment, the light source unit 2 includes one light source module 20b and two light source modules 20c. In this case as well, the LED elements 21 are unevenly arranged in each of the light source modules 20b and 20c. Therefore, in the light source unit 2, the LED elements 21 are unevenly arranged.

[0044] That is, in the lighting device 100 according to the second embodiment, the number of types of LED arrangement patterns in the light source modules 20 in the light source unit 2 is smaller than the number of light source modules 20 included in the light source unit 2. In other words, the number of types of lighting devices 100 with different LED arrangement patterns is greater than the number of types of LED arrangement patterns in the light source modules 20. Therefore, in the lighting device 100 according to the second embodiment, by increasing the number of types of LED arrangement patterns in the light source modules 20, it is possible to dramatically increase the number of types of lighting devices 100 with different LED arrangement patterns.

[0045] In addition, it is preferable to arrange the light source modules 20 in the light source unit 2 so as not to have rotational symmetry when arranging the light source modules 20. This makes it possible to reduce the symmetry of the arrangement of the LED elements 21 in the light source unit 2.

[0046] In the manufacturing method of the lighting fixture 100 according to the second embodiment, a plurality of light source modules 20 having the same arrangement of the LED elements 21 are arranged in the module arrangement step. At this time, as described above, the light source modules 20 are arranged so as not to be rotationally symmetric. More specifically, two or more types of light source modules 20 having different arrangements of the LED elements 21 are used for one light source unit 2, and the light source modules 20 are arranged so as not to be rotationally symmetric.

[0047] 2.Effects In the lighting fixture 100 according to the second embodiment, the multiple light source modules 20 include a light source module 20a and a light source module 20b. The light source module 20a and the light source module 20b have different arrangements of two or more LED elements 21. This reduces the possibility that the arrangement of the multiple LED elements 21 in the light source unit 2 will be irregular, making it easier to make the arrangement of the LED elements 21 non-uniform.

[0048] Moreover, in the lighting fixture 100 according to the second embodiment, each of the plurality of light source modules 20 has a light-emitting circuit including some of the plurality of LED elements 21. The connection configuration of the light-emitting circuits in the plurality of light source modules 20 is the same. This makes it possible to replace the plurality of light source modules 20 in the light source unit 2 in the lighting fixture 100. Therefore, by changing the combination of the plurality of light source modules 20, the arrangement of the plurality of LED elements 21 in the light source unit 2 can be easily changed.

[0049] (Embodiment 3) 1. Configuration In the lighting fixtures 100 according to the first and second embodiments, the light source unit 2 includes LED elements 21 of one color.

[0050] In contrast, in the lighting device 100 according to the third embodiment, the light source unit 2 includes LED elements 21 of multiple colors. More specifically, the light source unit 2 includes LED elements 21 of two colors.

[0051] As shown in FIG. 3, the lighting fixture 100 according to the third embodiment includes a plurality of light source modules 20 (three in FIG. 3). The light source module 20 includes a plurality of LED elements 21 (24 in FIG. 3). The plurality of LED elements 21 include a plurality of LED elements 21a (12 in FIG. 3) and a plurality of LED elements 21b (12 in FIG. 3). That is, the light source unit 2 includes two or more LED elements 21a and two or more LED elements 21b. Each of the plurality of LED elements 21a is, for example, a packaged type daylight color LED for lighting. Each of the plurality of LED elements 21b is, for example, a packaged type warm white LED for lighting. That is, the LED elements 21a and the LED elements 21b have different light emission colors. The LED elements 21a correspond to a first color LED element. The LED elements 21b correspond to a second color LED element. That is, the first color is daylight color, and the second color is warm white.

[0052] In the plurality of light source modules 20, two or more LED elements 21 are arranged non-uniformly. More specifically, in the light source module 20, two or more LED elements 21a are arranged non-uniformly. Moreover, two or more LED elements 21b are arranged non-uniformly. Furthermore, in the light source module 20, the arrangement of the LED elements 21a is different from the arrangement of the LED elements 21b.

[0053] More specifically, the light source unit 2 includes light source modules 20d, 20e, and 20f. In each of the light source modules 20d, 20e, and 20f, two or more LED elements 21a are arranged unevenly. In addition, the light source modules 20d, 20e, and 20f differ from each other in the arrangement of the LED elements 21a. In each of the light source modules 20d, 20e, and 20f, two or more LED elements 21b are arranged unevenly. In addition, the light source modules 20d, 20e, and 20f differ from each other in the arrangement of the LED elements 21b. In each of the light source modules 20d, 20e, and 20f, the arrangement of the LED elements 21a is different from the arrangement of the LED elements 21b.

[0054] As a result, the LED elements 21a are arranged non-uniformly in the light source unit 2. Therefore, in the space illuminated by the lighting device 100, it is possible to make the brightness of daylight color light non-uniform. Also, in the light source unit 2, the LED elements 21b are arranged non-uniformly. Therefore, in the space illuminated by the lighting device 100, it is possible to make the brightness of incandescent color light non-uniform.

[0055] Furthermore, in the light source unit 2, the arrangement of the LED elements 21a is different from the arrangement of the LED elements 21b. Therefore, in the space illuminated by the lighting fixture 100, the degree of mixing of the daylight color light and the incandescent color light can be made uneven. This makes it possible to make the color of the space illuminated by the lighting fixture 100 uneven, further enhancing the effect of providing imbalance, fluidity, and dynamism.

[0056] 2.Effects In the lighting fixture 100 according to the third embodiment, the LED elements 21 include two or more LED elements 21a and two or more LED elements 21b. The light emission color of the LED element 21b is different from the light emission color of the LED element 21a. The LED elements 21a and the LED elements 21b are both arranged unevenly. In the light source unit 2, the arrangement of the LED elements 21a is different from the arrangement of the LED elements 21b. This allows both the brightness and the color to be uneven in the space illuminated by the lighting fixture 100. Therefore, it is possible to further enhance the effect of providing imbalance, fluidity, and dynamism in the space illuminated by the lighting fixture 100.

[0057] (Modification) 1. Configuration In the lighting device 100 according to a modification of the third embodiment, the light source unit 2 includes LED elements 21 of three colors.

[0058] A lighting fixture 100 according to a modification of the third embodiment includes a plurality of light source modules 20 (three in FIG. 3) as shown in FIG. 4. The light source module 20 includes a plurality of LED elements 21 (24 in FIG. 4). The plurality of LED elements 21 include a plurality of LED elements 21c (eight in FIG. 4), a plurality of LED elements 21d (eight in FIG. 4), and a plurality of LED elements 21e (eight in FIG. 4). Each of the plurality of LED elements 21c is, for example, a packaged type blue LED for lighting. Each of the plurality of LED elements 21d is, for example, a packaged type green LED for lighting. Each of the plurality of LED elements 21e is, for example, a packaged type red LED for lighting. That is, one of the LED elements 21c to 21e corresponds to a first color LED element, and the other corresponds to a second color LED element.

[0059] In the plurality of light source modules 20, two or more LED elements 21 are arranged unequally. More specifically, in the light source module 20, two or more LED elements 21c are arranged unequally. Furthermore, two or more LED elements 21d are arranged unequally. Furthermore, two or more LED elements 21e are arranged unequally. Furthermore, in the light source module 20, the arrangement of the LED elements 21c, the arrangement of the LED elements 21d, and the arrangement of the LED elements 21e are different from each other.

[0060] More specifically, the light source unit 2 includes light source modules 20g, 20h, and 20i. In each of the light source modules 20g, 20h, and 20i, two or more LED elements 21c are arranged unevenly. In addition, the light source modules 20g, 20h, and 20i have different arrangements of the two or more LED elements 21c. In each of the light source modules 20g, 20h, and 20i, two or more LED elements 21d are arranged unevenly. In addition, the light source modules 20g, 20h, and 20i have different arrangements of the LED elements 21d. In each of the light source modules 20g, 20h, and 20i, two or more LED elements 21e are arranged unevenly. In addition, the light source modules 20g, 20h, and 20i have different arrangements of the LED elements 21e. In addition, the arrangement of the LED elements 21c, the arrangement of the LED elements 21d, and the arrangement of the LED elements 21e are different from each other in each of the light source modules 20g, 20h, and 20i. In addition, the arrangement of the LED elements 21c, the arrangement of the LED elements 21d, and the arrangement of the LED elements 21e are different from each other in each of the light source modules 20g, 20h, and 20i.

[0061] As a result, the LED elements 21c are arranged unevenly in the light source unit 2. Therefore, it is possible to make the brightness of blue light uneven in the space illuminated by the lighting fixture 100. Furthermore, the LED elements 21d are arranged unevenly in the light source unit 2. Therefore, it is possible to make the brightness of green light uneven in the space illuminated by the lighting fixture 100. Furthermore, the LED elements 21e are arranged unevenly in the light source unit 2. Therefore, it is possible to make the brightness of red light uneven in the space illuminated by the lighting fixture 100. Furthermore, in the light source unit 2, the arrangement of the LED elements 21c, the arrangement of the LED elements 21d, and the arrangement of the LED elements 21e are different from each other. Therefore, it is possible to make the color of the illumination light uneven in the space illuminated by the lighting fixture 100. As a result, it is possible to make both the brightness and the color uneven in the space illuminated by the lighting fixture 100, and it is possible to further strengthen the performance that provides imbalance, fluidity, and dynamism.

[0062] 2.Effects In the lighting fixture 100 according to the modified example of the third embodiment, the LED elements 21 include two or more LED elements 21c, two or more LED elements 21d, and two or more LED elements 21e. The light emission color of the LED element 21c, the light emission color of the LED element 21d, and the light emission color of the LED element 21e are different from each other. The LED elements 21c, the LED elements 21d, and the LED elements 21e are all arranged unevenly. In the light source unit 2, the arrangement of the LED elements 21c, the arrangement of the LED elements 21d, and the arrangement of the LED elements 21e are different from each other. This makes it possible to make both the brightness and the color uneven in the space illuminated by the lighting fixture 100. Therefore, it is possible to further strengthen the effect of providing imbalance, fluidity, and dynamism in the space illuminated by the lighting fixture 100.

[0063] (Embodiment 4) 1. Configuration (1) Light source unit In the lighting device 100 according to the fourth embodiment, the light source unit 2a includes the LED elements 21 that are unevenly arranged, as well as a plurality of evenly arranged LED elements 24. The LED elements 21 correspond to the first LED elements, and the LED elements 24 correspond to the second LED elements.

[0064] As shown in FIG. 5, the light source unit 2a includes a plurality of light source modules 25 (three in FIG. 5). Each of the light source modules 25 includes a plurality of LED elements 21, a plurality of LED elements 24, and a mounting substrate 22 curved on an arc. Each of the plurality of LED elements 21 is, for example, a packaged type white LED for lighting. Also, each of the plurality of LED elements 24 is, for example, a packaged type white LED for lighting. That is, the light source unit 2a includes a plurality of LED elements 21 and a plurality of LED elements 24. The plurality of light source modules 20 are arranged on a circumference centered on the central axis A1. Here, the emission color of the LED elements 21 and the emission color of the LED elements 24 may be the same or different. The emission color of the LED elements 21 and the emission color of the LED elements 24 are, for example, both white.

[0065] The lighting fixture 100 has a control circuit that controls the lighting of the light source unit 2a. The control circuit can collectively control the lighting of the multiple LED elements 21. The control circuit can collectively control the lighting of the multiple LED elements 24. Here, the control circuit controls the lighting of the multiple LED elements 21 and the multiple LED elements 24 individually. Specifically, for example, the control circuit includes a circuit that controls the application of voltage to the multiple LED elements 21 and a circuit that controls the application of voltage to the LED elements 24.

[0066] The control circuit of lighting device 100 receives input from a user as to which of the multiple LED elements 21 or the multiple LED elements 24 to light. The control circuit lights either the multiple LED elements 21 or the multiple LED elements 24 based on an instruction received from the user via, for example, a remote control. That is, lighting device 100 can control which of the multiple LED elements 21 or the multiple LED elements 24 to emit light based on a user selection. The control circuit of lighting device 100 may include, for example, a dip switch.

[0067] (2) Light source module (2.1) Circuit configuration of light source module The light source modules 25a to 25c each include the same number of LED elements 21 and the same number of LED elements 24. The light source modules 25a to 25c each have different arrangements of the LED elements 21. The light source modules 25a to 25c each have the same arrangements of the LED elements 24.

[0068] The light source module 25 includes a plurality of (15 in FIG. 5) LED elements 21 and a plurality of (21 in FIG. 5) LED elements 24. More specifically, the light source module 25 has a first light-emitting circuit including the plurality of LED elements 21, and a second light-emitting circuit including the plurality of LED elements 24. That is, in the light source module 25, the LED element 21a and the LED element 21b are included in different light-emitting circuits. For example, the circuit configuration of the first light-emitting circuit is the same in the plurality of light source modules 25. Also, for example, the circuit configuration of the second light-emitting circuit is the same in the plurality of light source modules 25.

[0069] The lighting of the multiple first light-emitting circuits of the multiple light source modules 25 is collectively controlled by the control circuit of the lighting fixture 100. Similarly, the lighting of the multiple second light-emitting circuits of the multiple light source modules 25 is collectively controlled by the control circuit of the lighting fixture 100. As a result, in the light source unit 2a, either the multiple LED elements 21 or the multiple LED elements 24 can be turned on.

[0070] (2.2) LED element layout In the light source module 25, two or more LED elements 21 are arranged unequally. On the other hand, in the light source unit 2a, two or more LED elements 24 are arranged evenly. Note that "two or more LED elements 24 are arranged evenly" here means that most of the LED elements 24 are arranged evenly, and includes a small number of unequally arranged LED elements 24 (e.g., 10% or less of the total number of LED elements 24). For example, when several of the LED elements 24 are misaligned by one or less LED elements 24 to avoid screws, connectors, etc. for fixing the light source module 25, this is included in "the LED elements 24 are arranged evenly."

[0071] More specifically, in the light source unit 2a, the multiple LED elements 24 are disposed at equal intervals on imaginary arcs C1, C2, and C3 centered on the central axis A1.

[0072] Specifically, in the light source unit 2a, two or more LED elements 24 on the virtual arc C1 are arranged at equal intervals. More specifically, the central angle between two LED elements 24 adjacent to each other in the extension direction of the virtual arc C1 is constant among the two or more LED elements 24 on the virtual arc C1. Similarly, in the light source unit 2a, two or more LED elements 24 on the virtual arc C2 are arranged at equal intervals. Moreover, in the light source unit 2a, two or more LED elements 24 on the virtual arc C3 are evenly arranged.

[0073] As a result, when the multiple LED elements 21 are emitting light in the lighting fixture 100, the luminance of the surface irradiated by the light source unit 2a can be made non-uniform. Therefore, the luminance of the space irradiated by the lighting fixture 100 can be made non-uniform, making it possible to produce an effect that provides imbalance, fluidity, and dynamism. On the other hand, when the multiple LED elements 24 are emitting light in the lighting fixture 100, the luminance of the surface irradiated by the light source unit 2a can be made uniform. Therefore, when it is necessary to uniformly illuminate the space irradiated by the lighting fixture 100, there is no need to use a separate lighting fixture.

[0074] 2.Effects In the lighting fixture 100 according to the fourth embodiment, the light source unit 2 further includes a plurality of LED elements 24 different from the plurality of LED elements 21. The plurality of LED elements 24 are evenly arranged. The lighting fixture 100 can control whether the plurality of LED elements 21 or the plurality of LED elements 24 are to be illuminated based on a user's selection. As a result, in the lighting fixture 100, when the plurality of LED elements 21 are illuminated, the brightness of the space illuminated by the lighting fixture 100 can be made uneven, so that a performance that provides imbalance, fluidity, and dynamism can be achieved. On the other hand, in the lighting fixture 100, when the plurality of LED elements 24 are illuminated, the space illuminated by the lighting fixture 100 can be illuminated evenly. Therefore, in one lighting fixture 100, it is possible to easily switch between the presence or absence of a performance that provides imbalance, fluidity, and dynamism.

[0075] (Embodiment 5) 1. Configuration (1) Lighting fixture configuration The lighting fixture 100 according to each of the first to fourth embodiments is circular when viewed from the direction D1. In contrast, the lighting fixture 100 according to the fifth embodiment is square when viewed from the direction D1. Therefore, in the lighting fixture 100 according to the fifth embodiment, the main body 1 and the cover 3 are square when viewed from the direction D1.

[0076] As shown in Fig. 6, the light source unit 2b includes a plurality of (eight in Fig. 6) light source modules 26. Each of the light source modules 26 includes a plurality of LED elements 21 and a mounting substrate 22a that is elongated in the direction D2. The light source modules 26 are arranged in a direction D3 that is perpendicular to the directions D1 and D2.

[0077] The light source modules 26a to 26d each include the same number of LED elements 21, but the arrangement of the LED elements 21 is different.

[0078] (2) Light source unit and light source module The light source module 26 includes two or more (13 in FIG. 6) LED elements 21. More specifically, the light source module 26 has a light-emitting circuit including two or more LED elements 21. Each of the light source modules 26a to 26d has, for example, the same circuit configuration of the light-emitting circuit.

[0079] In the light source module 26, the LED elements 21 are arranged non-uniformly.

[0080] A specific example in which the LED elements 21 are arranged non-uniformly will be described in more detail below.

[0081] For example, in the light source module 26, the LED elements 21 are arranged in a row in the direction D2. Moreover, the intervals between the LED elements 21 are uneven in the light source module 26. In other words, for three of the LED elements 21 among the LED elements 21 arranged in the direction D2 in the light source module 26, the interval between the LED element 21 at one end and the central LED element 21 is different from the interval between the central LED element 21 and the LED element 21 at the other end.

[0082] Also, for example, in the light source unit 2, the arrangement of the LED elements 21 is different in at least one combination of two light source modules 26 adjacent to each other in the direction D3. More specifically, for example, in the direction D2, the distance between one end of the light source module 26a and the LED element 21 closest to that end is different from the distance between one end of the light source module 26c and the LED element 21 closest to that end. Also, for example, the second LED element 21 from the end of the light source module 26a and the second LED element 21 from the end of the light source module 26b are not aligned in the direction D3.

[0083] As a result, in the light source unit 2b, there are some portions where the LED elements 21 are not arranged in a straight line in the direction D3. Also, in the light source unit 2b, the density of the LED elements 21 is not constant in the direction D2. As a result, in the light source unit 2b, the LED elements 21 are arranged unevenly. Therefore, the luminance of the illumination surface illuminated by the light source unit 2b can be made uneven. Therefore, the luminance of the space illuminated by the lighting device 100 can be made uneven, and it is possible to produce an effect that provides imbalance, fluidity, and dynamism.

[0084] 2. Manufacturing method of lighting fixtures A method for manufacturing the lighting device 100 will now be described.

[0085] The manufacturing method of the luminaire 100 includes a substrate preparation step, a module manufacturing step, a module arrangement step, and a luminaire assembly step.

[0086] In the mounting board preparation step, a plurality of elongated mounting boards 22a are prepared.

[0087] In the module manufacturing step, a plurality of light source modules 26 are manufactured. Each of the plurality of light source modules 26 is manufactured by unevenly arranging a plurality of LED elements 21 on an elongated mounting substrate 22a along a direction D2 that is the long axis direction of the mounting substrate 22a. More specifically, a plurality of LED elements 21 are arranged in a line along the direction D2 on the mounting substrate 22a that is elongated in the direction D2 such that the intervals are not uniform.

[0088] In the module manufacturing step, a plurality of (four in FIG. 6) LED arrangement patterns are used. In the module manufacturing step, the light source modules 26a, 26b, 26c, and 26d are manufactured using each of the four LED arrangement patterns. More specifically, in the module manufacturing step, the plurality of LED elements 21 are arranged on the mounting board 22a in the same manner as the light source module 26a in FIG. 6, to manufacture each of the plurality of light source modules 26a. Similarly, the plurality of LED elements 21 are arranged on the mounting board 22a in the same manner as the light source module 26b in FIG. 6, to manufacture each of the plurality of light source modules 26b. Similarly, in the module manufacturing step, the plurality of LED elements 21 are arranged on the mounting board 22a in the same manner as the light source module 26c in FIG. 6, to manufacture each of the plurality of light source modules 26c. Similarly, in the module manufacturing step, the plurality of LED elements 21 are arranged on the mounting board 22a in the same manner as the light source module 26d in FIG. 6, to manufacture each of the plurality of light source modules 26d.

[0089] In the module arrangement step, a plurality of (eight in FIG. 6) light source modules 26 manufactured in the module manufacturing step are arranged in a direction D3, which is the minor axis direction of the mounting board 22a. More specifically, eight light source modules 26 selected from each of the light source modules 26a, 26b, 26c, and 26d generated in the module manufacturing step, one or more (two of each in FIG. 6), are arranged in the direction D3 on the main body 1 to manufacture the light source unit 2b. At this time, the eight light source modules 26 are selected so that the arrangement of the LED elements 21 is not regular in the direction D3. For example, the eight light source modules 26 arranged in the direction D3 are selected so that the arrangement of the LED elements 21 is not point symmetrical and the LED elements 21 are not periodically arranged in the direction D3. More specifically, for example, as shown in FIG. 6, the light source modules 26a, 26b, 26c, 26d, 26b, 26d, 26c, and 26a are arranged in this order.

[0090] In the lighting device assembling step, the power supply unit and the cover 3 are attached to the main body 1. More specifically, the power supply unit and the cover 3 are attached to the main body 1 to which the light source unit 2 is attached. In this manner, the lighting device 100 is manufactured.

[0091] 3.Effects In the lighting device 100 according to the fifth embodiment, the LED elements 21 are arranged non-uniformly. This allows the lighting device 100 to emit light non-uniformly from the light source unit 2a, making it easy to make the luminance of the surface illuminated by the light source unit 2a non-uniform.

[0092] Moreover, in the lighting fixture 100 according to the fifth embodiment, the light source unit 2a includes a plurality of light source modules 26. Each of the plurality of light source modules 26 includes two or more of the plurality of LED elements 21. As a result, in the lighting fixture 100, by arranging the LED elements 21 unevenly in the light source modules 26, it becomes easy to arrange the plurality of LED elements 21 unevenly in the lighting fixture 100.

[0093] In the lighting device 100 according to the fifth embodiment, the plurality of light source modules 26 include a light source module 26a and a light source module 26b. The light source module 26a and the light source module 26b have different arrangements of two or more LED elements 21. This reduces the possibility that the arrangement of the plurality of LED elements 21 in the light source unit 2a will have regularity, and makes it easier to arrange the LED elements 21 non-uniformly.

[0094] Moreover, in the lighting fixture 100 according to the fifth embodiment, each of the plurality of light source modules 26 has a light-emitting circuit including some of the plurality of LED elements 21. The connection configuration of the light-emitting circuit is the same for each of the plurality of light source modules 26. This makes it possible to replace the plurality of light source modules 26 in the light source unit 2a in the lighting fixture 100. Therefore, by changing the combination of the plurality of light source modules 26, the arrangement of the plurality of LED elements 21 in the light source unit 2a can be easily changed.

[0095] The manufacturing method of the lighting device 100 according to the fifth embodiment includes a module manufacturing step and a module arranging step. In the module manufacturing step, a plurality of light source modules 26 are manufactured by arranging a plurality of LED elements 21 unevenly on an elongated mounting substrate 22a along a direction D2 that is the long axis direction of the mounting substrate 22a. In the module arranging step, a plurality of light source modules 26 manufactured in the module manufacturing step are arranged side by side in a direction D3 that is the short axis direction of the mounting substrate 22a. Since the LED elements 21 are unevenly arranged in the direction D2 in each of the plurality of light source modules 26, it is easy to make the arrangement of the LED elements 21 uneven in the lighting device 100. In addition, by manufacturing a plurality of types of light source modules 20 having different arrangements of the LED elements 21 from each other in the module manufacturing step, it is easy to manufacture a plurality of types of lighting devices 100 having different arrangements of the LED elements 21.

[0096] (Embodiment 6) 1. Configuration In the lighting device 100 according to the sixth embodiment, the light source unit 2c further includes a plurality of lenses 41 that correspond to the plurality of LED elements 24 in a one-to-one correspondence.

[0097] As shown in FIG. 7, the light source unit 2c includes a plurality of light source modules 27 (three in FIG. 7). The light source module 27 includes a plurality of LED elements 24. In the light source unit 2c, the plurality of LED elements 24 are evenly arranged as in the fourth embodiment. The plurality of LED elements 24 configure a light-emitting circuit in units of the light source module 27. That is, the plurality of LED elements 24 include a plurality of (e.g., three) LED element groups arranged in the light source module 27. Each of the plurality of LED element groups includes a plurality of (e.g., eight) LED elements 24 connected in series. The plurality of LED element groups are connected in parallel to each other, thereby configuring a light-emitting circuit.

[0098] In the light source unit 2c, a lens 41 is disposed on the surface of each of the LED elements 24. Each of the lenses 41 is formed of a synthetic resin having translucency, such as an acrylic resin or a polycarbonate resin. That is, the LED elements 24 and the lenses 41 correspond to each other one-to-one. The lenses 41 do not have uniform light distribution characteristics. More specifically, as shown in FIG. 8, the light distribution characteristics of the lens 41a corresponding to the LED element 24a are different from the light distribution characteristics of the lens 41b corresponding to the LED element 24b. The lens 41a corresponds to the first lens, and the lens 41b corresponds to the second lens. Here, the light distribution characteristics of the lens 41 are the relationship between the emission direction and the light intensity of the light passing through the lens 41, and are represented by, for example, a light distribution angle. The light distribution angle of the lens 41a is, for example, an angle a1 indicating a range in which the luminous intensity is 1 / 2 or more of the luminous intensity on the optical axis L1. Similarly, the light distribution angle of the lens 41b is, for example, an angle a2 indicating a range in which the luminous intensity is equal to or greater than half the luminous intensity on the optical axis L2. The light distribution angle of the lens 41b is greater than the light distribution angle of the lens 41a.

[0099] In the light source unit 2c, the lenses 41a and the lenses 41b are arranged unevenly. More specifically, in each of the light source modules 27a, 27b, and 27c, the lenses 41a and the lenses 41b are arranged unevenly. In the lenses 41 corresponding to the LED elements 24 on the virtual arc C1, the lenses 41a and the lenses 41b are arranged not periodically and not symmetrically. Similarly, in the lenses 41 corresponding to the LED elements 24 on the virtual arc C2, the lenses 41a and the lenses 41b are arranged not periodically and not symmetrically. Similarly, in the lenses 41 corresponding to the LED elements 24 on the virtual arc C3, the lenses 41a and the lenses 41b are arranged not periodically and not symmetrically.

[0100] As a result, the LED elements 24 corresponding to the lenses 41a are arranged unevenly in the light source unit 2c. Similarly, the LED elements 24 corresponding to the lenses 41b are arranged unevenly in the light source unit 2c. Therefore, it is easy to make the luminance of the irradiation surface irradiated by the light source unit 2c uneven. In addition, since the light distribution characteristics of the lenses 41a and 41b are different, the light flux passing through the lenses 41a and 41b differs depending on the angle between the direction from the lighting device 100 to the irradiation surface and the direction D1. That is, the luminance of the irradiation surface irradiated by the lighting device 100 can be made uneven with respect to the distance from the central axis A1.

[0101] 2.Effects In the lighting fixture 100 according to the sixth embodiment, the light source unit 2c further includes a plurality of lenses 41 corresponding to the plurality of LED elements 24 in a one-to-one correspondence. The plurality of lenses 41 include a plurality of lenses 41a and a plurality of lenses 41b. The lenses 41a and 41b have different light distribution characteristics. The plurality of lenses 41a and the plurality of lenses 41b are arranged unevenly. This makes it easy to make the luminance of the surface irradiated by the light source unit 2c uneven. In addition, since the light distribution characteristics of the lenses 41a and 41b are different, the light flux passing through the lens 41a and the light flux passing through the lens 41b differ depending on the angle between the direction from the lighting fixture 100 to the surface irradiated and the direction D1. That is, the luminance of the surface irradiated by the lighting fixture 100 can be made uneven with respect to the distance from the central axis A1.

[0102] In addition, in the lighting device 100 according to the sixth embodiment, the LED elements 24 include a plurality of LED element groups. The LED element groups are connected in parallel to each other. In each of the LED element groups, two or more LED elements 24 are connected in series. Some of the LED elements 24 included in the LED element groups correspond to the lenses 41a, and the remaining LED elements 24 included in the LED element groups correspond to the lenses 41b. The two or more first lenses are arranged unevenly. In addition, the two or more second lenses are arranged unevenly. This makes it easy to arrange the lenses 41 unevenly in the light source unit 2c in the lighting device 100.

[0103] (Other Modifications of the Embodiment) (1) In the lighting fixture 100 according to the first to fourth and sixth embodiments, the light source unit 2, 2a, 2c includes three light source modules 20, 25, 27, but the light source unit 2 may include two light source modules 20. Alternatively, the light source unit 2 may include four or more light source modules 20. Also, the light source modules 20, 25, 27 include three rows of the LED elements 21, 24, but the rows of the LED elements 21 may be one or two rows, or four or more rows. This allows the arrangement pattern of the LED elements 21 in the light source module 20 to be appropriately prepared.

[0104] In the lighting fixtures 100 according to the first to fourth and sixth embodiments, the shape of the light source units 2 is not limited to a circular shape, and may be an elliptical or polygonal shape.

[0105] (2) In the lighting device 100 according to the fifth embodiment, the light source unit 2b includes eight light source modules 26, but the number of light source modules 26 included in the light source unit 2b may be two to seven, or nine or more. Furthermore, the number of light source modules 26 having different arrangement patterns of the LED elements 21 is not limited to four, and may be two, three, five or more types.

[0106] Furthermore, although light source module 26 includes one row of LED elements 21, there may be two or more rows of LED elements 21. Furthermore, in lighting device 100 according to embodiment 5, light source unit 2b has a square shape, but may also have a rectangular shape.

[0107] Furthermore, light source modules 26 having different arrangements of LED elements may have different widths in direction D3, which allows the arrangement patterns of LED elements 21 in light source modules 26 to be prepared appropriately.

[0108] (3) In the lighting fixture 100 according to the third embodiment, the LED element 21a emits light in daylight color, and the LED element 21b emits light in incandescent color, but the light emission color of the LED element 21a and the light emission color of the LED element 21b may be any color as long as they are not the same color. Similarly, in the lighting fixture 100 according to the modification of the third embodiment, the light emission colors of the LED elements 21c, 21d, and 21e are not limited to blue, green, and red, and may be any color as long as they do not include the same color. The types of light emission colors of the LED element 21 are not limited to two or three types, and may be four or more types.

[0109] (4) In the lighting device 100 according to the sixth embodiment, the LED elements 24 are evenly arranged in the light source unit 2c, but they may be unevenly arranged similarly to the LED elements 21 in the first to fourth embodiments. This makes it easier to make the luminance of the surface illuminated by the light source unit 2c uneven.

[0110] (5) In lighting device 100 according to embodiment 6, multiple lenses 41 include lenses 41a and 41b having different light distribution angles. However, multiple lenses 41 may include three or more types of lenses 41 having different light distribution angles.

[0111] Furthermore, the lenses 41a and 41b have different light distribution angles, but the lenses 41a and 41b may have different optical axis extension directions, or may have different light distribution angles and different optical axis extension directions.

[0112] (6) In lighting device 100 according to embodiment 6, the multiple lenses 41 are disposed directly on light source module 27, but a light distribution member including the multiple lenses 41 may be provided separately from light source module 27. The light distribution member may be one light distribution member including all of the multiple lenses 41, or two or more light distribution members may be disposed between light source unit 2c and cover 3, so that the two or more light distribution members function as the multiple lenses 41.

[0113] (7) The above-described embodiments and modifications are merely a part of the various embodiments and modifications of the present invention. In addition, the embodiments and modifications can be modified in various ways depending on the design, etc., as long as the object of the present invention can be achieved. In addition, one embodiment and another embodiment, one embodiment and another modification, or one modification and another modification may be combined as appropriate.

[0114] (Aspect) The lighting fixture (100) according to the first aspect includes light source units (2 to 2c). The light source units (2 to 2c) each include a plurality of LED elements (21; 24). The luminance of a surface illuminated by the light source units (2 to 2c) is non-uniform.

[0115] The lighting fixture (100) according to the above aspect makes it possible to make the brightness of the space illuminated by the lighting fixture (100) non-uniform, thereby enabling an effect that provides a sense of imbalance, fluidity, and dynamism.

[0116] In the lighting fixture (100) according to the second embodiment, the LED elements (21) are arranged unequally in the light source units (2-2b) in the first embodiment.

[0117] According to the lighting fixture (100) of the above aspect, the light source unit (2) can emit light non-uniformly, so that it is easy to make the luminance of the surface illuminated by the light source unit 2 non-uniform.

[0118] In the lighting fixture (100) according to the third aspect, in the second aspect, the light source unit (2-2c) includes a plurality of light source modules (20; 25; 26). Each of the plurality of light source modules (20; 25; 26; 27) includes two or more LED elements (21) out of the plurality of LED elements (21).

[0119] In the lighting fixture (100) according to the above aspect, by arranging the LED elements (21) unevenly in the light source modules (20; 25; 26), it becomes easy to arrange the LED elements (21) unevenly in the lighting fixture (100).

[0120] In the lighting fixture (100) according to the fourth aspect, the plurality of light source modules (20; 25; 26) in the third aspect include a first module (20a; 20d; 20g; 25a; 26a) and a second module (20b; 20e; 20h; 25b; 26b). The first modules (20a; 20d; 20g; 25a; 26a) and the second modules (20b; 20e; 20h; 25b; 26b) differ from each other in the arrangement of the two or more LED elements (21).

[0121] The lighting fixture (100) according to the above aspect reduces the possibility that the arrangement of the multiple LED elements (21) in the light source unit (2; 2a; 25) will be irregular, making it easier to arrange the LED elements (21) unevenly.

[0122] In a lighting fixture (100) according to a fifth aspect, in the third or fourth aspect, each of the plurality of light source modules (20; 25; 26) has a light-emitting circuit including some of the plurality of LED elements (21). In the plurality of light source modules (20; 25; 26), the circuit configuration of the light-emitting circuit is the same as each other.

[0123] According to the lighting fixture (100) of the above aspect, the light source modules (20; 25; 26) are replaceable in the light source unit (2; 2a; 2b). Therefore, by changing the combination of the light source modules (20; 25; 26), the arrangement of the LED elements (21) in the light source unit (2; 2a; 2b) can be easily changed.

[0124] In the lighting device (100) according to the sixth aspect, in any one of the second to fifth aspects, the light source unit (2a) further includes a plurality of second LED elements (24) different from the plurality of first LED elements (21). The plurality of second LED elements (24) are evenly arranged. The lighting device (100) is capable of controlling which of the plurality of first LED elements (21) or the plurality of second LED elements (24) is to emit light.

[0125] According to the lighting fixture (100) of the above aspect, when the multiple LED elements (21) are caused to emit light, the brightness of the space illuminated by the lighting fixture (100) can be made non-uniform, making it possible to produce an effect that provides imbalance, fluidity, and dynamism. On the other hand, when the multiple LED elements (24) are caused to emit light, the lighting fixture (100) can evenly illuminate the space illuminated by the lighting fixture (100). Therefore, with one lighting fixture (100), it is possible to easily switch between the presence and absence of an effect that provides imbalance, fluidity, and dynamism.

[0126] In the lighting fixture (100) according to the seventh aspect, in any one of the second to sixth aspects, the LED elements (21) include two or more first color LED elements (21a; 21c) and two or more second color LED elements (21b; 21d). The light emission color of the two or more second color LED elements (21b; 21d) is different from the light emission color of the two or more first color LED elements (21a; 21c). The two or more first color LED elements (21a; 21c) and the two or more second color LED elements (21b; 21d) are both arranged unevenly. In the light source unit (2), the arrangement of the two or more first color LED elements (21a; 21c) is different from the arrangement of the two or more second color LED elements (21b; 21d).

[0127] The lighting fixture (100) according to the above aspect can provide uneven brightness and color in a space illuminated by the lighting fixture (100). This makes it possible to further enhance the effect of providing a sense of imbalance, fluidity, and dynamism in the space illuminated by the lighting fixture (100).

[0128] The lighting device (100) according to an eighth aspect is any one of the first to seventh aspects, wherein the light source unit (2c) further includes a plurality of lenses (41) corresponding one-to-one to the plurality of LED elements (24). The plurality of lenses (41) includes a plurality of first lenses (41a) and a plurality of second lenses (41b). The plurality of first lenses (41a) and the plurality of second lenses (41b) have different light distribution characteristics. The plurality of first lenses (41a) and the plurality of second lenses (41b) are arranged unevenly.

[0129] The lighting device (100) according to the above aspect can easily make the luminance of the surface illuminated by the light source unit (2c) non-uniform. Moreover, since the first lens (41a) and the second lens (41b) have different light distribution characteristics, it is even easier to make the luminance of the surface illuminated by the lighting device (100) non-uniform.

[0130] In the lighting device (100) according to the ninth aspect, in the eighth aspect, the plurality of LED elements (24) include a plurality of LED element groups. The plurality of LED element groups are connected in parallel with each other. In each of the plurality of LED element groups, two or more LED elements are connected in series. Some of the LED elements (24) included in the plurality of LED element groups correspond to the first lenses (41a), and the remaining of the LED elements (24) included in the plurality of LED element groups correspond to the second lenses (41b). The two or more first lenses (41a) are arranged unequally. The two or more second lenses (41b) are arranged unequally.

[0131] The lighting device (100) according to the above aspect makes it easy to unevenly arrange the lenses (41) in the light source unit (2c).

[0132] A manufacturing method of a lighting fixture (100) according to a tenth aspect includes a module manufacturing step and a module arranging step. In the module manufacturing step, a plurality of light source modules (20; 25) are manufactured by arranging a plurality of LED elements (21) unevenly in at least one of the circumferential direction or radial direction of the arc on an arc-shaped substrate (22). In the module arranging step, the plurality of light source modules (20; 25) manufactured in the module manufacturing step are arranged in a circumferential shape.

[0133] According to the manufacturing method of the lighting fixture (100) of the above aspect, the LED elements (21) are unevenly arranged in the light source modules (20; 25), which makes it easy to arrange the LED elements (21) unevenly in the lighting fixture (100). Furthermore, by manufacturing a plurality of types of light source modules (20; 25) having different arrangements of the LED elements (21) in the module manufacturing step, it becomes easy to manufacture a plurality of types of lighting fixtures (100) having different arrangements of the LED elements (21).

[0134] A method for manufacturing a lighting fixture (100) according to an eleventh aspect includes a module manufacturing step and a module arranging step. In the module manufacturing step, a plurality of light source modules (26) are manufactured by unevenly arranging a plurality of LED elements (21) on an elongated substrate (22a) along the long axis direction (D2) of the substrate. In the module arranging step, the plurality of light source modules (26) manufactured in the module manufacturing step are arranged side by side in the short axis direction (D3) of the substrate (22a).

[0135] According to the method for manufacturing the lighting fixture (100) of the above aspect, the LED elements (21) are unevenly arranged in the light source module (26), which makes it easy to arrange the LED elements (21) unevenly in the lighting fixture (100). Furthermore, by manufacturing a plurality of types of light source modules (26) having different arrangements of the LED elements (21) in the module manufacturing step, it becomes easy to manufacture a plurality of types of lighting fixtures (100) having different arrangements of the LED elements (21). [Explanation of symbols]

[0136] 100 Lighting fixtures 2, 2a, 2b, 2c Light source unit 20, 20c, 20f, 20g, 20i, 25, 25c, 26, 26c; 26d, 27, 27a, 27b, 27c Light source module 20a;20d;20g;25a;26a Light source module (first module) 20b;20e;20h;25b;26b Light source module (second module) 21;21e LED element (first LED element) 21a; 21c LED element (first color LED element) 21b;21d LED element (second color LED element) 22, 22a Mounting board (substrate) 24 LED element (second LED element) 41 Lens 41a Lens (1st lens) 41b lens (second lens) D2 direction (long axis direction) D3 direction (minor axis direction)

Claims

1. A light source unit having a plurality of LED elements is provided, The luminance of the surface illuminated by the light source unit is non-uniform. Lighting fixtures.

2. In the light source unit, the LED elements are arranged unevenly.

2. A lighting fixture according to claim 1.

3. The light source unit includes a plurality of light source modules, Each of the plurality of light source modules includes two or more LED elements among the plurality of LED elements.

3. A lighting device according to claim 2.

4. The plurality of light source modules include a first module and a second module, The first module and the second module have different arrangements of the two or more LED elements.

4. A lighting device according to claim 3.

5. Each of the plurality of light source modules has a light-emitting circuit including a part of the plurality of LED elements, In the plurality of light source modules, the circuit configurations of the light-emitting circuits are the same.

4. A lighting device according to claim 3.

6. The light source unit further includes a plurality of second LED elements different from the plurality of first LED elements, The plurality of second LED elements are evenly arranged, The lighting device is capable of controlling which of the plurality of first LED elements and the plurality of second LED elements is to emit light based on a user's selection.

3. A lighting device according to claim 2.

7. the plurality of LED elements include two or more first color LED elements and two or more second color LED elements; the emission color of the two or more second color LED elements is different from the emission color of the two or more first color LED elements; the two or more first color LED elements and the two or more second color LED elements are both unevenly arranged, In the light source unit, the arrangement of the two or more first color LED elements is different from the arrangement of the two or more second color LED elements.

3. A lighting device according to claim 2.

8. The light source unit further includes a plurality of lenses each corresponding to one of the LED elements, The plurality of lenses includes a plurality of first lenses and a plurality of second lenses, The plurality of first lenses and the plurality of second lenses have light distribution characteristics different from each other, The plurality of first lenses and the plurality of second lenses are unevenly arranged. A luminaire according to any one of claims 1 to 7.

9. the plurality of LED elements includes a plurality of LED element groups, The plurality of LED element groups are connected in parallel to each other, In each of the plurality of LED element groups, two or more LED elements are connected in series, some of the LED elements included in the plurality of LED element groups correspond to the first lens, and the remaining LED elements included in the plurality of LED element groups correspond to the second lens; The two or more first lenses are unevenly arranged, The two or more second lenses are unevenly arranged.

9. A lighting device according to claim 8.

10. a module manufacturing step of manufacturing a plurality of light source modules by disposing a plurality of LED elements on an arc-shaped substrate unevenly in at least one of a circumferential direction and a radial direction of the arc; a module arrangement step of arranging the plurality of light source modules manufactured in the module manufacturing step in a circumferential shape; A method for manufacturing a lighting fixture, comprising:

11. a module manufacturing step of manufacturing a plurality of light source modules by unevenly arranging a plurality of LED elements on a long substrate along a long axis direction of the substrate; a module arrangement step of arranging the plurality of light source modules manufactured in the module manufacturing step in a line in a minor axis direction of the substrate; A method for manufacturing a lighting fixture, comprising:

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