Lighting equipment

Abstract

To provide lighting equipment that does not impair outer appearance.SOLUTION: Lighting equipment includes an equipment body attached to an attaching part, and a light source unit attached to the equipment body, having an LED module for blue color for emitting blue color light and an LED module for white color for emitting white color light. The light source unit includes: a frame for holding the LED module for blue color and the LED module for white color; a scatter plate provided so as to extend in one direction with respect to the frame for guiding the light emitted from the LED module for blue color; and a diffusion plate provided so as to be inclined from a scatter plate side for guiding the light emitted from the LED module for white light, which includes a light blocking part extending from the end part on the scatter plate side toward the LED module for blue color for blocking the light from the LED module for blue color toward the scatter plate.SELECTED DRAWING: Figure 8

Description

[Technical field]

[0001] The present disclosure relates to a lighting fixture attached to a mounting portion such as a ceiling. [Background technology]

[0002] Conventionally, lighting fixtures attached to a mounting portion such as a ceiling are known. Patent Document 1 discloses a lighting fixture including a box-shaped fixture body with an opening at the bottom, a plate-shaped scattering plate disposed inside the fixture body, a lower guide plate supporting the scattering plate from the bottom of each of two end faces extending in the longitudinal direction, an upper guide plate supporting the scattering plate from the top, a light source composed of LEDs or the like disposed to correspond to the two end faces extending in the longitudinal direction of the scattering plate, and a frame-shaped diffusion plate extending at an angle from the scattering plate. As the light source in Patent Document 1, two LED modules, a blue LED module and a white LED module, are given. The light irradiated from the blue LED module is guided to the scattering plate to reproduce the color of the sky, and the light irradiated from the white LED module is guided to the diffusion plate to reproduce the color of the sun. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Patent Publication No. 2021-26796 Summary of the Invention [Problem to be solved by the invention]

[0004] In a lighting fixture that reproduces the color of the sky and the color of the sunlight, such as the lighting fixture disclosed in Patent Document 1, a phenomenon occurs in which a black line appears at the boundary between the scattering plate and the diffusing plate. This may cause the lighting fixture to look unattractive.

[0005] The present disclosure has been made to solve the above-mentioned problems, and provides a lighting fixture that does not mar the appearance. [Means for solving the problem]

[0006] The lighting fixture of the present disclosure comprises a fixture body attached to a mounting portion, and a light source unit attached to the fixture body and having a blue LED module that emits blue light and a white LED module that emits white light, wherein the light source unit comprises a frame that holds the blue LED module and the white LED module, a scattering plate that is arranged to extend in one direction relative to the frame and guides light emitted from the blue LED module, and a diffusion plate that is arranged at an angle from the scattering plate side and guides light emitted from the white LED module, and has a shading portion that extends from the end on the scattering plate side toward the blue LED module and blocks light from the blue LED module toward the scattering plate. Effect of the Invention

[0007] According to the present disclosure, the diffusion plate has a light-shielding portion that blocks the light from the blue LED module toward the diffusion plate. Therefore, the light from the blue LED module toward the diffusion plate hits the light-shielding portion and does not reach the diffusion plate. Therefore, a black line is unlikely to appear at the boundary between the diffusion plate and the diffusion plate. Therefore, the appearance of the lighting device is not impaired. [Brief description of the drawings]

[0008] [Figure 1] FIG. 1 is an exploded perspective view showing a lighting fixture according to a first embodiment. [Diagram 2] 1 is a perspective view showing a lighting fixture according to a first embodiment. [Diagram 3] 1 is a side view showing a lighting fixture according to a first embodiment. [Figure 4] 1 is a side view showing a lighting fixture according to a first embodiment. [Diagram 5] 1 is a front view showing a lighting fixture according to a first embodiment. [Figure 6] FIG. 1 is an exploded perspective view showing a lighting fixture according to a first embodiment. [Figure 7] FIG. 1 is an exploded perspective view showing a lighting fixture according to a first embodiment. [Figure 8] 1 is a side cross-sectional view showing a lighting fixture according to a first embodiment. [Figure 9] 1 is a graph showing the relationship between the blue sky area and the hazy area of ​​the lighting device of the first embodiment. [Figure 10] 1 is a table showing the results of an experiment conducted to confirm the optimal values ​​of the luminance ratio and color temperature between a blue sky surface and a sunny surface. [Figure 11] 13 is a table showing the results of an experiment to confirm the desirability of the color temperature of the sunny surface of multiple prototypes, and the naturalness of both the blue sky surface and the sunny surface combined. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0009] Hereinafter, an embodiment of the lighting fixture according to the present disclosure will be described with reference to the drawings. In each drawing, the same reference numerals are used to denote the same or equivalent parts, and this is common throughout the entire specification. In addition, throughout the entire specification, the direction from the floor to the ceiling, i.e., the z2 direction of the z direction, may be referred to as the "upper direction" and the ceiling side may be referred to as the "upper side". Similarly, the vertical direction from the ceiling to the floor, i.e., the z1 direction, may be referred to as the "downward direction" and the floor side may be referred to as the "lower side". The x and y directions are perpendicular to the z direction and may be referred to as the horizontal direction. In the following description, the expressions "inside" and "outside" (including inside, outside, inner surface, and outer surface) may be used to describe positional relationships and directions, but unless otherwise specified, the central part side of the lighting fixture 1 is referred to as the inside, and the outer side of the lighting fixture 1 is referred to as the outside. In each drawing, the relative dimensional relationship or shape of each component may differ from the actual one.

[0010] Embodiment 1 Fig. 1 is an exploded perspective view showing a lighting fixture 1 according to the first embodiment. As shown in Fig. 1, the lighting fixture 1 is attached to a mounting portion 2 such as a ceiling or a wall, and emits light. The mounting portion 2 has an embedding hole 3 formed therein, into which the lighting fixture 1 is embedded. The mounting portion 2 is provided with a plurality of hanging bolts 4 for mounting the lighting fixture 1, and a power line (not shown) and a signal line (not shown) extend through the mounting portion 2. The power line supplies power, and the signal line transmits control signals.

[0011] Fig. 2 is a perspective view showing the lighting fixture 1 according to embodiment 1, and Fig. 3 and Fig. 4 are side views showing the lighting fixture 1 according to embodiment 1. As shown in Figs. 2 to 4, the lighting fixture 1 is configured by attaching a light source unit 10 to a fixture body 5.

[0012] Fig. 5 is a front view showing lighting fixture 1 according to embodiment 1. As shown in Fig. 5, lighting fixture 1 simulates blue sky surface 51, sunny surface 52, and shaded surface 53. Lighting fixture 1 thereby expresses a blue sky with a sense of depth and natural light in an indoor space.

[0013] 6 and 7 are exploded perspective views showing the lighting fixture 1 according to the first embodiment. As shown in FIG. 6 and FIG. 7, the lighting fixture 1 includes a fixture body 5 and a light source unit 10. The light source unit 10 includes a first light source unit 20 and a second light source unit 30. The fixture body 5 is formed in a rectangular box shape having an opening on the lower surface as one surface. The fixture body 5 is a box shape with an opening on the lower side. The first light source unit 20 is arranged inside the fixture body 5, and the second light source unit 30 is arranged below the first light source unit 20.

[0014] As described above, the lighting fixture 1 according to the first embodiment is, for example, a ceiling-embedded lighting fixture 1. In the lighting fixture 1, a fixture body 5 that houses the first light source unit 20 and a portion of the second light source unit 30 excluding a flange portion 35 described below is embedded in an embedding hole 3 formed in the ceiling. The lighting fixture 1 is installed on the ceiling such that the lower end surface of the flange portion 35 of the second light source unit 30 is exposed along the ceiling surface.

[0015] The first light source unit 20 is structured to support a scattering plate 25 and a blue LED module 26 that emits light onto the scattering plate 25. The second light source unit 30 is structured to support a diffusion plate 33, a white LED module 31 that irradiates light toward the diffusion plate 33, and a protective cover 32 that protects a scattering light-emitting surface 25a, which is the lower surface of the scattering plate 25 facing in the z1 direction.

[0016] The lighting fixture 1, which will be described in detail below, emits light from the scattering light-emitting surface 25a of the scattering plate 25 and the diffusing light-emitting surface 33a, which is an inclined inner surface of the diffusing plate 33. In the first embodiment, the modules in which the light sources provided in the lighting fixture 1 are installed are described as a white LED module 31 and a blue LED module 26. However, the color of the light emitted from the light source is changed appropriately depending on the application of the lighting fixture 1, and the color of the light source is not limited. Note that Figs. 6 and 7 show only the main parts of the first light source unit 20 and the second light source unit 30, and in reality, other members are attached to the structure shown in Figs. 6 and 7.

[0017] (Apparatus body 5) The device body 5 is formed in a rectangular box shape and is open at the bottom. The device body 5 has a main surface 6 and four side surfaces 7. The main surface 6 is formed in a rectangular plate shape. Each of the side surfaces 7 is formed in a long and narrow rectangular plate shape. Each of the side surfaces 7 is provided so as to extend downward from each of the four sides of the main surface 6 in a direction perpendicular to the main surface 6.

[0018] Of the four side surfaces 7 of the fixture body 5, a V-spring mounting bracket (not shown) is attached to the inner surfaces of two opposing side surfaces 7. The V-spring mounting bracket hooks and holds a V-spring 40 (see FIG. 1) provided on the second light source unit 30.

[0019] A bolt hole 8 is formed in the main surface 6, and is configured so as to be attached to a hanging bolt 4 or the like extending from an embedded hole 3 in the ceiling. After the hanging bolt 4 is inserted into the bolt hole 8, the fixture body 5 is fixed in place by tightening the hanging bolt 4 with a nut, for example.

[0020] Furthermore, an electric wire hole 9 and a terminal block (not shown) are provided on the main surface 6. The terminal block is electrically connected to a control unit 22 provided in the lighting fixture 1.

[0021] Although the outline of the structure for mounting the lighting fixture 1 to the ceiling has been described above, the mounting structure is not limited to the above and can be changed as appropriate.

[0022] (First light source unit 20) As shown in FIGS. 6 and 7, the first light source unit 20 has a rear cover 21, a control unit 22, a power supply unit 23, an elastic member 24, a blue LED module 26, and a frame 27.

[0023] (Rear cover 21) The rear cover 21 is a plate-shaped member made of sheet metal and is provided on the side of the device main body 5. The rear cover 21 covers the control unit 22, the power supply unit 23, the elastic member 24, and the scattering plate 25.

[0024] (Control unit 22) The control unit 22 includes a power source for causing the light source to emit light and a control device for controlling the light emission.

[0025] (Power supply unit 23) The power supply unit 23 supplies power to each of the blue LED module 26 and the white LED module 31. The power supply unit 23 is long and attached to the frame 27. The power supply unit 23 supplies power to each of the blue LED module 26 and the white LED module 31. The power supply unit 23 adjusts the light intensity of each LED provided in each of the blue LED module 26 and the white LED module 31.

[0026] The power supply units 23 may be provided independently for each color of the LEDs. Specifically, for example, three power supply units 23 may be assigned to each of the blue LEDs, the white LEDs, and the green LEDs of the blue LED module 26. Also, two power supply units 23 are assigned to each of the daylight LEDs and the warm LEDs of the white LED module 31. In this case, the number of power supply units 23 is five. Alternatively, one power supply unit 23 may be assigned to each of the white LEDs and the green LEDs of the blue LED module 26, and the white LEDs and the green LEDs may be dimmed together. In this case, the number of power supply units 23 is four. The power supply unit 23 converts the power supplied from an external power supply into power for making the light source emit light. Furthermore, the power supply unit 23 is provided with a dimming unit (not shown) that dims the blue LED module 26 to reproduce the color of the sky and dims the white LED module 31 to reproduce the light of the sun.

[0027] (Elastic member 24) The elastic member 24 is interposed between the rear cover 21 and the scattering plate 25, and is an elastic member that prevents foreign matter from entering onto the scattering plate 25.

[0028] (Scatter board 25) The scattering plate 25 is formed in a plate shape. The scattering plate 25 is formed in a square shape in a plan view. The scattering plate 25 transmits the light emitted from the blue LED module 26 and emits the blue light from the lower surface, which is the emission surface, the scattering light emitting surface 25a. The scattering plate 25 also includes therein scatterers, which are particles that scatter light. The scattering plate 25 is formed of acrylic resin. The scattering plate 25 contains, for example, silica as a scatterer.

[0029] The upper surface of the scattering plate 25 is smooth in order to cause total reflection. The upper surface of the scattering plate 25 is preferably mirror-finished. If the upper surface of the scattering plate 25 is scratched during the assembly work of the lighting device 1, total reflection will be difficult to occur at the scratched area. Therefore, a part of the lower surface corresponding to the scratched area of ​​the upper surface may appear whitish, which may make it difficult to create the appearance of a blue sky. Therefore, in order to prevent the upper surface of the scattering plate 25 from being scratched, the upper surface of the scattering plate 25 may be covered with a reflective sheet.

[0030] Here, when covering the upper surface of the scattering plate 25 with a reflective sheet, if the reflective sheet is attached without leaving a gap between the upper surface of the scattering plate 25 and the reflective sheet, total reflection is unlikely to occur on the upper surface of the scattering plate 25. In order to ensure that light is totally reflected on the upper surface of the scattering plate 25, an air layer is required between the scattering plate 25 and the reflective sheet. In order to form the air layer, the reflective surface of the reflective sheet facing the upper surface of the scattering plate 25 is matte-finished. The matte-finishing is a process for forming fine irregularities on frosted glass. By matte-finishing the reflective surface of the reflective sheet, an air layer can be provided between the scattering plate 25 and the reflective sheet. In addition, an adhesive portion may be provided on the edge of the reflective sheet for the purpose of fixing the reflective sheet to the scattering plate 25.

[0031] (Blue LED module 26) The blue LED module 26 is held by a frame 27, and light emitted from the blue LED module 26 travels horizontally inward from the frame 27. The blue LED module 26 has two plate-shaped substrates. The blue LED module 26 is arranged so as to be parallel to two opposing end faces extending in the longitudinal direction of the scattering plate 25. The blue LED module 26 also has a plurality of LEDs arranged on those substrates. The plurality of LEDs include, for example, a blue LED, a white LED, and a green LED. The blue LED, white LED, and green LED provided in the blue LED module 26 are dimmed by the power supply unit 23.

[0032] In this way, the power supply unit 23 adjusts the brightness of each LED, so that the light emitted by the blue LED module 26 can be made blue as a whole, and the color tone of the blue light can be changed. As a result, the lighting device 1 can produce visual effects that mimic various blue skies. The power supply unit 23 may be provided independently for each color of LED. Alternatively, the white LEDs and the green LEDs may be adjusted together by the power supply unit 23. In this case, the number of power supply units 23 can be reduced. The color tone of the blue light may be changed according to the time. Specifically, for example, the brightness may be adjusted so that the daytime time period from 8:00 a.m. to 5:00 p.m. is bright blue, and the other time periods are dark blue. In this way, the blue LED module 26 is an optical module having a light source. The light source is not limited to an LED, and other light-emitting elements or light-emitting devices may be used.

[0033] The two substrates of blue LED module 26 are arranged to face two end faces extending in the longitudinal direction of scattering plate 25. Light emitted from blue LED module 26 is incident on the end faces of scattering plate 25 and travels through scattering plate 25 while being totally reflected by the upper and lower faces of scattering plate 25. A part of the light traveling through scattering plate 25 is scattered when it hits a scatterer within scattering plate 25. Blue light, which is the first light, is emitted from the lower face, which is the exit face of scattering plate 25.

[0034] (Frame 27) The frame 27 is a square frame-shaped member in a plan view, and holds the blue LED module 26 .

[0035] (Second light source unit 30) As shown in FIG. 7, the second light source unit 30 has a white LED module 31, a protective cover 32, a diffusion plate 33, and a decorative frame .

[0036] (White LED module 31) The white LED module 31 is held by a decorative frame 34, and the light emitted from the white LED module 31 travels from the decorative frame 34 toward the inside in the horizontal direction. The white LED module 31 is provided in a U-shape in a plan view. That is, the white LED module 31 is configured to form three sides of a rectangle. The white LED module 31 has three plate-shaped substrates and white LEDs provided on each of the three substrates. The angle between adjacent substrates is 90°. In this way, the white LED module 31 is an optical module having a light source. The light source is not limited to an LED, and other light-emitting elements or light-emitting devices may be used. The white LED module 31 emits white light toward the inside from the white LEDs provided on each of the three substrates. In this way, the white LED module 31 emits white light from the three directions forming the U-shape. The white LED module 31 is disposed inside the frame 27 and is held by the frame 27.

[0037] (Protective cover 32) The protective cover 32 is a transparent and light-transmitting cover formed in a plate shape, and is formed of a transparent resin material such as acrylic. The protective cover 32 is rectangular in a plan view. The protective cover 32 is disposed facing the scattering light-emitting surface 25a of the scattering plate 25. The protective cover 32 is disposed away from the scattering light-emitting surface 25a in a direction perpendicular to the scattering plate 25 (z direction). The protective cover 32 is a cover for preventing the attachment of foreign matter such as dirt and dust to the scattering plate 25 and scratches. The protective cover 32 transmits light emitted from the scattering light-emitting surface 25a on the lower side of the scattering plate 25. The protective cover 32 is disposed so as to cover the upper opening of the diffusion plate 33, and closes the lower opening of the fixture body 5 together with the diffusion plate 33.

[0038] (Diffuser 33) The diffusion plate 33 is formed in a square frame shape in a plan view. The diffusion plate 33 is made of, for example, a white resin such as milky white. The diffusion plate 33 is formed in a quadrangular pyramid shape with the upper and lower sides open. Therefore, each of the four side surfaces 7 of the diffusion plate 33 is inclined at a preset angle with respect to the vertical direction. Each of the four side surfaces 7 of the diffusion plate 33 is made of a trapezoidal diffusion plate 33, and the length of the upper side is shorter than the length of the lower side. In addition, since each of the four side surfaces 7 of the diffusion plate 33 is inclined, the position of the upper side is arranged to be more inward than the position of the lower side in a plan view. As a result, the internal space of the diffusion plate 33 is tapered and enlarged downward. As described above, the diffusion plate 33 is formed by combining four trapezoidal diffusion plates 33. However, the formation method is not limited to this, and the diffusion plate 33 may be formed by integral molding.

[0039] Of the four side surfaces 7 of the diffusion plate 33, three surfaces are light-emitting surfaces and the remaining surface is a non-light-emitting surface. The three light-emitting surfaces are arranged in a U-shape to match the U-shaped white LED module 31.

[0040] Here, of the four side surfaces 7 of the diffusion plate 33, the inner surface facing the internal space of the diffusion plate 33 will be referred to as the front surface, and the outer surface will be referred to as the back surface.

[0041] The diffusion plate 33 is disposed inside the white LED module 31. Therefore, the white LED modules 31 are disposed on the rear side of each of the light-emitting surfaces of the diffusion plate 33. The white light emitted from the white LED module 31 enters from the rear side of the light-emitting surface of the diffusion plate 33, passes through the light-emitting surface, and is emitted from the front of the light-emitting surface. Since each of the light-emitting surfaces is inclined, the white light emitted from the front of the three light-emitting surfaces irradiates in a diagonally downward direction.

[0042] In this way, the diffusion plate 33 has a configuration in which three light-emitting surfaces that emit white light and one non-light-emitting surface that does not emit light are combined. Therefore, the light emitted from the diffusion plate 33 comes from three directions, so it is possible to produce a visual effect with a sense of depth, as if light from outside were shining through a window frame in the sunlight or through a window frame in the shade.

[0043] (Light shielding part 33b) The diffusion plate 33 has a light blocking portion 33 b that extends from the upper end toward the blue LED module 26 and blocks light traveling from the blue LED module 26 toward the scattering plate 25 .

[0044] (Decorative Frame 34) The decorative frame 34 is a rectangular, frame-shaped member in a plan view. The decorative frame 34 is arranged so as to protrude horizontally outward from inside the opening of the fixture body 5. The decorative frame 34 supports the frame 27 from below. The decorative frame 34 is made of, for example, metal. The V-spring 40 (see FIG. 1) is attached to the side surface 7 of the decorative frame 34. A total of four V-springs 40 are provided in accordance with the positions of the V-spring mounting brackets of the fixture body 5. The V-springs 40 are wire springs formed by bending a metal wire into a V shape.

[0045] Fig. 8 is a side cross-sectional view showing the lighting device 1 according to the first embodiment. As shown in Fig. 8, the distance of the gap 60 between the light blocking portion 33b and the frame 27 is 0 mm to 4 mm. With respect to the light that has entered the gap 60 between the light blocking portion 33b and the frame 27, a portion of the light blocked by the light blocking portion 33b becomes a shadow, and a phenomenon that a black line occurs at the boundary between the scattering plate 25 and the diffusion plate 33 may occur. In the first embodiment, since the distance of the gap 60 between the light blocking portion 33b and the frame 27 is 0 mm to 4 mm, it is possible to prevent the light from entering the gap 60. Therefore, it is possible to prevent the black line from occurring.

[0046] FIG. 9 is a graph showing the relationship between the blue sky area and the white haze area of ​​the lighting fixture 1 according to the first embodiment. As shown in FIG. 8, in the first embodiment, the angle between the extension direction of the diffuser 33 and the irradiation direction of the white LED module 31 is 45° or less. Here, there is a risk that the light irradiated from the white LED module 31 is reflected on the blue sky surface 51, causing the blue sky surface 51 to become widely blurred. As shown in FIG. 9, the larger the angle between the extension direction of the diffuser 33 and the irradiation direction of the white LED module 31, the larger the area of ​​the blue sky surface 51 becomes, and the smaller the angle between the extension direction of the diffuser 33 and the irradiation direction of the white LED module 31, the smaller the area of ​​the blue sky surface 51 becomes. When the angle between the extension direction of the diffuser 33 and the irradiation direction of the white LED module 31 is 45° or less, the white haze area falls within the allowable range. In the first embodiment, since the angle between the extension direction of the diffusion plate 33 and the irradiation direction of the white LED module 31 is 45° or less, the area of ​​white haze is reduced, improving the design.

[0047] FIG. 10 is a table showing the results of an experiment to confirm the optimum values ​​of the luminance ratio and color temperature between the blue sky surface 51 and the sunny surface 52. The luminance ratio shown in FIG. 10 is the ratio of the luminance of the sunny surface 52 to the luminance of the blue sky surface 51, and is a value obtained by dividing the luminance of the light emitted from the diffusion plate 33 by the luminance of the light emitted from the light guide plate 17. Also, in FIG. 10, the chromaticity of the blue sky surface 51 and the sunny surface 52 is shown in the xy coordinate system (x, y) of the CIE chromaticity diagram. "OK", "△" or "×" in the "Desirability" and "Evaluation" shown in FIG. 10 is determined based on whether or not it looks like an actual sky. For example, when the luminance of the sunny surface 52 is high, the light emitted from the blue sky surface 51 is overpowered by the sunny surface 52, so that the light from the sunny surface 52 looks like lighting. However, when the color temperature of the sunny surface 52 is low, the sunny surface 52 does not look like lighting, but when the color temperature of the sunny surface 52 is too low, it gives an impression of evening. "△" indicates a result that is within the acceptable range but is not necessarily OK.

[0048] 10, it was found that the luminance ratio between blue sky surface 51 and sunny surface 52, i.e., the luminance of light emitted from light guide plate 17: the luminance of light emitted from diffuser plate 33, is preferably 1:5.8 to 1:7, with 1:7 being the optimal value. It was also found that the optimal chromaticity of light emitted from diffuser plate 33 is (0.338, 0.345) to (0.363, 0.355) in the xy coordinate system (x, y) of the CIE chromaticity diagram.

[0049] Fig. 11 is a table showing the results of an experiment to confirm the desirability of the color temperature of sunny surface 52 in a number of prototypes, and the naturalness of both blue sky surface 51 and sunny surface 52 combined. As shown in Fig. 11, when prototype 103 and prototype 104 are compared, the luminance ratio is equivalent, but it was found that the overall naturalness including both blue sky surface 51 and sunny surface 52 differs due to the difference in the absolute value of the luminance of blue sky surface 51 and sunny surface 52. In other words, it was found that there is a range of optimal values ​​for the luminance ratio and chromaticity.

[0050] In the present embodiment 1, the dimming unit dims the white LED module 31 or the blue LED module 26 so that the ratio of the luminance of the light emitted from the scattering plate 25 to the luminance of the light emitted from the diffusion plate 33 is 1:7.7 or less. This reduces the area of ​​white haze and improves the design.

[0051] According to the first embodiment, the diffusion plate 33 has a light-shielding portion 33b that blocks light from the blue LED module 26 toward the scattering plate 25. Therefore, the light from the blue LED module 26 toward the scattering plate 25 hits the light-shielding portion 33b and does not reach the scattering plate 25. Therefore, a black line is unlikely to appear at the boundary between the scattering plate 25 and the diffusion plate 33. Therefore, the appearance of the lighting fixture 1 is not impaired.

[0052] It should be noted that lighting fixture 1 is not limited to the configuration of embodiment 1. The configuration of embodiment 1 is an example, and lighting fixture 1 may include other configurations. Lighting fixture 1 includes the range of design modifications and application variations that are normally implemented by a person skilled in the art, provided that the modifications do not deviate from the technical concept. It is also possible to configure a lighting system by connecting lighting fixture 1 according to embodiment 1 to a network.

[0053] Various aspects of the present disclosure are summarized below as appendices.

[0054] [Appendix 1] An appliance main body to be attached to the attachment portion; a light source unit attached to the device body and having a blue LED module that emits blue light and a white LED module that emits white light, The light source unit includes: a frame for holding the blue LED module and the white LED module; a scattering plate provided to extend in one direction relative to the frame and configured to guide light emitted from the blue LED module; a diffusion plate provided at an angle from the scattering plate side to guide the light emitted from the white LED module, the diffusion plate having a light shielding portion extending from an end portion on the scattering plate side toward the blue LED module and shielding the light from the blue LED module toward the scattering plate. Lighting fixtures. [Appendix 2] The gap between the light blocking portion and the frame is 0 mm to 4 mm. 2. A luminaire as described in Appendix 1. [Appendix 3] The angle between the extension direction of the diffusion plate and the irradiation direction of the white LED module is 45° or less. 1. A luminaire as defined in claim 1 or 2. [Appendix 4] A dimming unit is further provided which dims the blue LED module to reproduce the color of the sky and dims the white LED module to reproduce the light of the sun, The dimming unit dims the white LED module or the blue LED module so that the ratio of the luminance of the light emitted from the scattering plate to the luminance of the light emitted from the diffusion plate is 1:7.7 or less. 4. The lighting device according to claim 1, [Explanation of symbols]

[0055] 1 lighting fixture, 2 mounting portion, 3 recessed hole, 4 hanging bolt, 5 fixture body, 6 main surface, 7 side, 8 bolt hole, 9 wire hole, 10 light source unit, 20 first light source unit, 21 rear cover, 22 control unit, 23 power supply unit, 24 elastic member, 25 scattering plate, 25a scattering light emitting surface, 26 blue LED module, 27 frame, 30 second light source unit, 31 white LED module, 32 protective cover, 33 diffusion plate, 33a scattering light emitting surface, 33b shading portion, 34 decorative frame, 35 flange portion, 40 V spring, 51 blue sky surface, 52 sunny surface, 53 shaded surface, 60 gap.

Claims

1. An appliance main body to be attached to the attachment portion; a light source unit attached to the device body and having a blue LED module that emits blue light and a white LED module that emits white light, The light source unit includes: a frame for holding the blue LED module and the white LED module; a scattering plate provided to extend in one direction relative to the frame and configured to guide light emitted from the blue LED module; a diffusion plate provided at an angle from the scattering plate side to guide the light emitted from the white LED module, the diffusion plate having a light shielding portion extending from an end portion on the scattering plate side toward the blue LED module and shielding the light from the blue LED module toward the scattering plate. Lighting fixtures.

2. The gap between the light blocking portion and the frame is 0 mm to 4 mm.

2. The lighting device of claim 1.

3. The angle between the extension direction of the diffusion plate and the irradiation direction of the white LED module is 45° or less.

3. A lighting fixture according to claim 1 or 2.

4. A dimming unit is further provided which dims the blue LED module to reproduce the color of the sky and dims the white LED module to reproduce the light of the sun, The dimming unit dims the white LED module or the blue LED module so that the ratio of the luminance of the light emitted from the scattering plate to the luminance of the light emitted from the diffusion plate is 1:7.7 or less.

3. A lighting fixture according to claim 1 or 2.

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