Lighting fixtures and windows

Abstract

To provide lighting devices and windows that enhance the insect-attracting effect. [Solution] The lighting device 100 includes a surface light source 10 having a long rectangular light-emitting portion EP in plan view. The ratio of the length of the long side to the length of the short side of the light-emitting portion EP in plan view is greater than 2 and less than 6. The lighting device 100 further includes a lighting body 103 that supports the surface light-emitting source 10 in a position where the longitudinal direction of the light-emitting portion EP is perpendicular to the vertical direction. Here, the surface light-emitting source 10 includes a light-emitting module 1 and a light guide plate 2 which is a long rectangular plate and is positioned opposite at least one end in the longitudinal or short direction perpendicular to the thickness direction, and guides the light incident inward from the light-emitting module 1.

Description

Technical Field

[0001] The present invention relates to a lighting device and a window.

Background Art

[0002] There has been proposed a bug attracting lamp including a cylindrical light-transmitting tube and a long LED mounting substrate in which a plurality of LED chips that emit light having a wavelength of 300 to 700 nm, which is the visible range of insects, are mounted in the light-transmitting tube (see, for example, Patent Document 1).

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] By the way, a bug attracting lamp as described in Patent Document 1 is required to have a higher insect attracting effect.

[0005] The present invention has been made in view of the above circumstances, and an object thereof is to provide a lighting device and a window with enhanced insect attracting effects.

Means for Solving the Problems

[0006] To achieve the above object, a lighting device according to the present invention includes a surface light source having a light emitting portion that is rectangular in shape and long in plan view, and a ratio of the length of the long side to the length of the short side in the plan view of the light emitting portion is greater than 2 and less than 6.

[0007] From another aspect, a window according to the present invention includes a light transmission portion formed in a rectangular shape in plan view from a light-transmissive material, The ratio of the length of the longer side to the length of the shorter side in a plan view of the light-transmitting portion is greater than 2 and less than 6. [Effects of the Invention]

[0008] The lighting device according to the present invention is equipped with a surface-emitting light source having a long rectangular light-emitting portion in plan view, wherein the ratio of the length of the long side to the length of the short side of the light-emitting portion of the surface-emitting light source in plan view is greater than 2 and less than 6. Furthermore, the window according to the present invention is equipped with a light-transmitting portion formed in a rectangular shape in plan view from a translucent material, wherein the ratio of the length of the long side to the length of the short side of the light-transmitting portion in plan view is greater than 2 and less than 6. This makes it possible to enhance the insect-attracting effect. [Brief explanation of the drawing]

[0009] [Figure 1] This is a schematic diagram showing an example of a lighting device according to Embodiment 1 of the present invention. [Figure 2] This is a schematic diagram of the surface-emitting light source according to Embodiment 1. [Figure 3] The light-emitting module according to Embodiment 1 is shown, where (A) is a plan view and (B) is a perspective view. [Figure 4] This is a cross-sectional view of the light-emitting module according to Embodiment 1, taken along line AA in Figure 3(A). [Figure 5] (A) is a schematic diagram of the surface-emitting light source according to Comparative Example 1, (B) is a schematic diagram of the surface-emitting light source according to Comparative Example 2 and Examples 1 to 4, and (C) is a schematic diagram of the light-emitting module according to Comparative Example 3. [Figure 6] This figure shows the wavelength spectra of light emitted from the lighting devices according to Comparative Examples 1 to 3 and Examples 1 to 3. [Figure 7] The results of experiments to attract houseflies and phorid flies using the lighting devices described in Comparative Examples 1 and 2 and Example 1 are shown below. (A) shows the results for Comparative Examples 1 and 2, (B) shows the results for Comparative Example 1 and Example 1, and (C) shows the results for Comparative Example 2 and Example 1. [Figure 8]The results of experiments to attract houseflies and phorid flies using the lighting devices described in Comparative Examples 2 and 3 and Example 1 are shown below. (A) shows the results for Comparative Examples 2 and 3, and (B) shows the results for Comparative Example 3 and Example 1. [Figure 9] The results of experiments to attract houseflies and phorid flies using the lighting devices described in Comparative Examples 1 and 2 and Examples 1 to 3 are shown below. (A) shows the results for Example 3 and Comparative Example 1, (B) shows the results for Examples 1 and 2, and (C) shows the results for Example 3 and Comparative Example 2. [Figure 10] The results of experiments to attract houseflies and phorid flies using the lighting devices described in Comparative Example 1 and Examples 1 and 4 are shown below. (A) is a figure showing the results for Examples 1 and 4, and (B) is a figure showing the results for Example 4 and Comparative Example 1. [Figure 11] This is a schematic diagram showing an example of a lighting device according to Embodiment 2 of the present invention. [Figure 12] (A) is a schematic diagram of the surface-emitting light source according to Comparative Example 4, (B) is a schematic diagram of the surface-emitting light source according to Comparative Example 5, (C) is a schematic diagram of the surface-emitting light source according to Comparative Example 6, (D) is a schematic diagram of the surface-emitting light source according to Comparative Example 7, (E) is a schematic diagram of the surface-emitting light source according to Example 5, and (F) is a schematic diagram of the surface-emitting light source according to Example 6. [Figure 13] (A) is a schematic diagram of the surface-emitting light source according to Example 7, (B) is a schematic diagram of the surface-emitting light source according to Comparative Example 8, (C) is a schematic diagram of the surface-emitting light source according to Comparative Example 9, and (D) is a schematic diagram of the surface-emitting light source according to Comparative Example 10. [Figure 14] The results of experiments to attract houseflies and phorid flies using the lighting devices of Comparative Examples 4, 8 to 10 are shown below. (A) shows the results for Comparative Examples 4 and 8, (B) shows the results for Comparative Examples 4 and 9, and (C) shows the results for Comparative Examples 4 and 10. [Figure 15]The results of experiments on attracting house flies and mosquitoes using the lighting devices according to Comparative Example 4 and Examples 5 to 7 are shown. (A) is a diagram showing the results for Example 5 and Comparative Example 4, (B) is a diagram showing the results for Example 6 and Comparative Example 4, and (C) is a diagram showing the results for Example 7 and Comparative Example 4. [Figure 16] The results of experiments on attracting house flies and mosquitoes using the lighting devices according to Comparative Examples 4 to 7 are shown. (A) is a diagram showing the results for Comparative Examples 4 and 5, (B) is a diagram showing the results for Comparative Examples 4 and 6, and (C) is a diagram showing the results for Comparative Examples 4 and 7. [Figure 17] The results of experiments on attracting house flies and mosquitoes using the lighting devices according to Comparative Examples 5 to 7 and Examples 5 to 7 are shown. (A) is a diagram showing the results for Example 5 and Comparative Example 5, (B) is a diagram showing the results for Example 6 and Comparative Example 6, and (C) is a diagram showing the results for Example 7 and Comparative Example 7. [Figure 18] It is a schematic configuration diagram showing an example of the lighting device according to Embodiment 3 of the present invention. [Figure 19] (A) is a schematic diagram of the surface-emitting light source according to Example 8, (B) is a schematic diagram of the surface-emitting light source according to Comparative Example 11, and (C) is a schematic diagram of the surface-emitting light source according to Comparative Example 12. [Figure 20] The results of experiments on attracting house flies and mosquitoes using the lighting devices according to Comparative Examples 11 and 12 and Example 8 are shown. (A) is a diagram showing the results for Comparative Examples 11 and 12, (B) is a diagram showing the results for Example 8 and Comparative Example 11, and (C) is a diagram showing the results for Example 8 and Comparative Example 12.

Mode for Carrying Out the Invention

[0010] (Embodiment 1) Hereinafter, a lighting device according to an embodiment of the present invention will be described with reference to the accompanying drawings. The lighting device according to the present embodiment has a light-emitting portion having a long shape in a plan view, and has a maximum intensity in each of a first wavelength band of 430 nm or more and 460 nm or less and a second wavelength band of 500 nm or more and 650 nm or less, and a maximum intensity of the first wavelength band is larger than a maximum intensity of the second wavelength band. A surface light source that emits white light having a wavelength spectrum, and a lighting main body that supports the surface light source in a posture where the longitudinal direction of the light-emitting portion is orthogonal to the vertical direction.

[0011] As shown in FIG. 1, a lighting device 100 according to the present embodiment includes a surface light source 10 and a lighting main body 103 that supports the surface light source 10, and is installed on a ground F. The surface light source 10 has a light-emitting portion EP having a long rectangular shape in a plan view. As shown in FIG. 2, the surface light source 10 includes two light-emitting modules 1 that emit white light, a light guide plate 2, two light-shielding covers 3, and a milk semi-plate 4.

[0012] As shown in FIGS. 3(A) and (B), the light-emitting module 1 includes a long flexible circuit board 21, a plurality of light-emitting portions 22, a current-limiting element 23 for limiting the current supplied to the light-emitting portions 22, and a transparent and flexible cover 11. Further, the light-emitting module 1 includes caps 12 that are attached to both ends in the longitudinal direction of the cover 11 and seal the inside of the cover 11. The cap 12 is formed of, for example, a resin material and has a bottomed rectangular tube shape. An introduction hole 12a for introducing a power line PL1 is provided in the bottom wall of the cap 12. The inner cross-sectional dimension of the cap 12 is larger than the outer cross-sectional dimension of the cover 11 and is attached so as to cover both ends in the longitudinal direction of the cover 11. The power line PL1 led out from the cap 12 is connected to a power supply device included in the lighting main body 103 described later. The circuit board 21 is composed of, for example, FPC (Flexible Printed Circuits), and a conductor pattern (not shown) is formed. Electrodes 211 that are electrically connected to the power line PL1 are provided at both ends in the longitudinal direction of the circuit board 21.

[0013] The light-emitting unit 22 is composed of, for example, an SMD (Surface Mount Device) type LED (Light Emitting Diode) light-emitting device. The light-emitting unit 22 emits white light having a wavelength spectrum in which the intensity reaches its maximum value in a first wavelength band of 430 nm to 460 nm and a second wavelength band of 500 nm to 650 nm, and in which the maximum intensity value in the first wavelength band is greater than the maximum intensity value in the second wavelength band. The light-emitting unit 22 has a main body 22b which is rectangular in shape and has a circular recess 22c formed on one side in the thickness direction when viewed from above, a light-emitting element 22a disposed at the bottom of the recess 22c, and a light-transmitting member (not shown) which is light-transmitting and fills the recess 22c. As the light-emitting element 22a, an LED element that emits ultraviolet light having a wavelength spectrum in which the intensity reaches its maximum value in the aforementioned first wavelength band is used. Furthermore, the light-transmitting member is made of a light-transmitting material that contains a fluorescent or phosphorescent substance that is excited by ultraviolet light emitted from the light-emitting element 22a and emits light whose intensity is maximum in the aforementioned second wavelength band. Multiple light-emitting units 22 are mounted in rows at equal intervals on the circuit board 21. The light-emitting elements 22a of the light-emitting units 22 are connected to each other in series or parallel via a conductive pattern formed on the circuit board 21. The current-limiting element 23 is interposed in the conductive pattern formed on the circuit board 21 and limits the current flowing through the light-emitting elements 22a to a preset size. When current flows from the power supply to the light-emitting elements 22a through the power line PL1 and the conductive pattern, the light-emitting elements 22a light up.

[0014] The cover 11 is a long, cylindrical shape formed from a flexible material, and as shown in Figure 4, the circuit board 21 and multiple light-emitting parts 22 are arranged inside 11e. As the flexible material, a thermosetting polyurethane resin, silicone resin, etc., that is transparent to white light can be used. In addition, both ends 21a in the short direction of the circuit board 21 are embedded in the cover 11, and the second main surface 21c of the circuit board 21, opposite to the first main surface 21b, is in close contact with the cover 11.

[0015] Returning to Figure 2, the light guide plate 2 is a long rectangular plate and guides white light incident inward from the light-emitting parts 22 of each of the two light-emitting modules 1, which are positioned opposite each other at both ends in the short direction perpendicular to the thickness direction of the light guide plate 2. The light guide plate 2 has a long rectangular plate shape and a light incident surface 201a formed at both ends in the Z-axis direction, which is inclined so as to gradually decrease in thickness toward the ends in the Z-axis direction, and a reflective film 202 made of metal and formed to cover the -Y direction side of the light guide plate body 201. Multiple fine recesses (not shown) are formed on the reflective film 202 side of the light guide plate body 201 to scatter light propagating inside the light guide plate body 201. The two light-emitting modules 1 are each positioned to face the light incident surface 201a of the light guide plate body 201 from the ±Z direction. Light incident on the light incident surface 201a from the light-emitting modules 1 is scattered by the recesses of the light guide plate body 201 and reflected by the reflective film 202, and emitted from the entire surface on the +Y direction side of the light guide plate 2. The entire surface on the +Y direction side of the light guide plate 2 constitutes the light-emitting portion EP of the surface light-emitting light source 10. Here, the ratio of the length of the long side to the length of the short side in a plan view of the light-emitting portion EP is preferably greater than 2 and less than 6.

[0016] The two light-shielding covers 3 are elongated and have an L-shaped cross-section. The light-shielding cover 3 positioned on the +Z side is positioned to cover the +Y and +Z sides of the entire light-emitting module 1. The light-shielding cover 3 positioned on the -Z side is also positioned to cover the +Y and -Z sides of the entire light-emitting module 1.

[0017] The translucent plate 4 is a rectangular plate with an outer shape that is approximately the same as the light guide plate body 201 of the light guide plate 2 when viewed from above, and is positioned to cover the entire +Y direction side of the light guide plate body 201 of the light guide plate 2. When light is incident on the translucent plate 4 from the light guide plate 2, it appears as if the entire plate is glowing milky white when viewed from the +Y direction side.

[0018] Returning to Figure 1, the lighting unit 103 includes a holding part 101 for holding the surface light source 10, a support body 102 for supporting the holding part 101, and a power supply device (not shown) that supplies power to the light-emitting module 1 of the surface light source 10 via a power line PL1. The power supply device includes, for example, a rectifier and smoothing circuit that rectifies and smooths the AC supplied from the commercial power source to convert it into DC, and a power conversion circuit that boosts or steps down the DC output from the rectifier and smoothing circuit to the rated voltage of the lighting device 100 and outputs it.

[0019] The lighting body 103 supports the surface light source 10 in a position where the longitudinal direction of the light-emitting portion EP of the surface light source 10 is perpendicular to the vertical direction, that is, in a position along the X-axis direction. In other words, the lighting body 103 supports the surface light source 10 such that the longitudinal direction of the light-emitting portion EP of the surface light source 10 is horizontal with respect to the ground F. As a result, when the lighting device 100 is viewed from the side of the light emission direction of the surface light source 10, that is, the +Y direction side, the light-emitting portion EP of the surface light source 10 can be seen as a light-emitting body in which the length in the direction horizontal to the ground F is longer than the length in the direction perpendicular to the ground.

[0020] Next, the performance of the lighting devices according to Examples 1 to 4 of this embodiment will be described in comparison with the performance of the lighting devices according to Comparative Examples 1 to 3. The lighting devices according to Comparative Examples 1 to 3 are the same as the lighting device 100 according to this embodiment, except for the surface light source 10. The light source of the lighting device according to Comparative Example 1 is a surface light source 9010A having a square-shaped light guide plate 9002A in plan view, as shown in Figure 5(A), and the entire surface on the +Y direction side of the light guide plate 9002A constitutes the light-emitting portion. Here, the length of one side L91A of the light guide plate 9010A is 200 mm. The lighting devices according to Comparative Example 2 and Examples 1 to 4 are equipped with surface light sources 9010B, 10A, 10B, 10C, and 10D having rectangular-shaped light guide plates 9002B, 2A, 2B, 2C, and 2D in plan view, as shown in Figure 5(B). The entire surface on the +Y direction side of the light guide plates 9002B, 2A, 2B, 2C, and 2D constitutes the light-emitting portion. Here, the length L92B in the short direction of the light guide plate 9002B in Comparative Example 2, and the lengths L12A, L12B, L12C, and L12D in the short direction of the light guide plates 9002B, 2A, 2B, and 2D in Examples 1, 2, and 4 are all 100 mm, while the length L12C in the short direction of the light guide plate 10C in Example 3 is 66.7 mm. Also, the length L91B in the long direction of the light guide plate 9002B in Comparative Example 2 is 200 mm. The length L11A in the long direction of the light guide plate 2A in Example 1 is 400 mm. The lengths L11B and L11C in the long direction of the light guide plates 2B and 2C in Examples 2 and 3 are 600 mm. The length L11D in the long direction of the light guide plate 2D in Example 4 is 300 mm. In other words, the ratio of the length of the long side to the length of the short side in a plan view of the light-emitting portion of the lighting device according to Examples 1 to 4, that is, the ratio of the length in the longitudinal direction to the length in the short direction of the light guide plates 2A, 2B, 2C, and 2D, is greater than 2 and less than 6. The lighting device according to Comparative Example 3, as shown in Figure 5(C), comprises a light source 9010C having a rectangular plate-shaped reflector 9002C and two light-emitting modules 1 arranged on the +Y direction side of the reflector 9002C. Here, the length L91C in the longitudinal direction of the reflector 9010C is 200 mm, and the length L92C in the short direction is 100 mm.

[0021] As shown in Figure 6, the wavelength spectra of the light emitted from the lighting devices of Comparative Examples 1 to 3 and Examples 1 to 3 all showed a shape in which the intensity reached its maximum value in both the first wavelength band of 430 nm to 460 nm and the second wavelength band of 500 nm to 650 nm, with the maximum intensity in the first wavelength band being larger than the maximum intensity in the second wavelength band. The sizes of the light guide plates of the lighting devices of Comparative Examples 1 to 3 and Examples 1 to 4, and the total number of photons emitted from the lighting devices during operation are summarized in Table 1 below.

[0022] [Table 1]

[0023] Here, we will explain the results of an experiment comparing the insect attraction performance of each lighting device according to Comparative Examples 1 to 3 and Examples 1 to 4. In this experiment, the number of houseflies or phorid flies attracted to each of the two lighting devices selected from Comparative Examples 1 to 3 and Examples 1 to 4 was measured in an environment where many houseflies or phorid flies were present. The experiment was conducted four times for each combination of two lighting devices, and the average number of measured flies was calculated. Furthermore, the four experiments were conducted twice with the two lighting devices in a predetermined arrangement, and then twice with the arrangement of the two lighting devices swapped. As shown in Figure 7(A), it was found that the lighting devices according to Comparative Examples 1 and 2 had equivalent attraction performance for both houseflies and phorid flies. As shown in Figure 7(B), it was found that the lighting device according to Example 1 had higher attraction performance for both houseflies and phorid flies compared to the lighting device according to Comparative Example 1. In particular, the performance difference between the lighting device according to Example 1 and the lighting device according to Comparative Example 1 was significant for houseflies. As shown in Figure 7(C), the lighting device according to Example 1 was found to have higher attraction performance than the lighting device according to Comparative Example 2. Furthermore, a significant performance difference was observed between the lighting device according to Example 1 and the lighting device according to Comparative Example 2 for houseflies. Also, as shown in Figure 8(A), the lighting device according to Comparative Example 3 was found to have higher attraction performance for both houseflies and phorid flies compared to the lighting device according to Comparative Example 2. As shown in Figure 8(B), the lighting device according to Example 1 was found to have particularly high attraction performance for houseflies compared to the lighting device according to Comparative Example 3.

[0024] As shown in Figure 9(A), the lighting device according to Example 3 was found to have higher attraction performance for both houseflies and phorid flies compared to the lighting device according to Comparative Example 1. In particular, the performance difference between the lighting device according to Example 3 and the lighting device according to Comparative Example 1 was particularly pronounced for houseflies. As shown in Figure 9(B), the lighting device according to Example 2 was found to have slightly higher attraction performance for both houseflies and phorid flies compared to the lighting device according to Example 1. As shown in Figure 9(C), the lighting device according to Example 3 was found to have higher attraction performance, especially for houseflies, compared to the lighting device according to Comparative Example 2. As shown in Figure 10(A), the lighting device according to Example 1 was found to have higher attraction performance for both houseflies and phorid flies compared to the lighting device according to Example 4. As shown in Figure 10(B), the lighting device according to Example 4 was found to have higher attraction performance for both houseflies and phorid flies compared to the lighting device according to Comparative Example 1.

[0025] As described above, according to the lighting device 100 of this embodiment, the surface-emitting light source 10 has a long rectangular light-emitting portion EP in plan view. Furthermore, the ratio of the length of the long side to the length of the short side of the light-emitting portion EP of the surface-emitting light source 10 in plan view is greater than 2 and less than 6. This enhances the insect-attracting effect.

[0026] (Embodiment 2) The lighting device according to this embodiment differs from the lighting device 100 according to Embodiment 1 in that it includes a light-shielding mask formed in an elongated shape from a non-transparent material, which has a plurality of light-shielding portions that cover the light-emitting portion so as to extend along the longitudinal direction of the light-emitting portion from one end to the other in the longitudinal direction of the light-emitting portion of the surface light-emitting light source.

[0027] As shown in Figure 11, the lighting device 2100 according to this embodiment comprises a surface-emitting light source 2010 and a lighting body 103 that supports the surface-emitting light source 2010, and is installed on the ground F. In Figure 11, components similar to those in Embodiment 1 are denoted by the same reference numerals as in Figure 1.

[0028] The surface-emitting light source 2010 includes two light-emitting modules 1, a light guide plate 2002 which is approximately square in plan view, a light-shielding mask 2003, two light-shielding covers 3, and a translucent plate 2004. The light guide plate 2002 guides white light incident inward from the light-emitting parts 22 of each of the two light-emitting modules 1, which are arranged opposite each other at both ends in the short direction perpendicular to the thickness direction of the light guide plate 2002. The light guide plate 2002 has a light guide plate body 2201 which, like the light guide plate 2, has light incident surfaces (not shown) formed at both ends in the Z-axis direction such that the thickness gradually decreases towards both ends in the Z-axis direction, and a reflective film (not shown) formed to cover the -Y direction side of the light guide plate body 2201. The two light-emitting modules 1 are each arranged so as to face the light incident surface of the light guide plate body 2201 from the ±Z direction side. The translucent plate 2004 is a plate that is approximately square in shape when viewed from above, and is positioned on the +Y direction side of the light guide plate 2002.

[0029] The light-shielding mask 2003 is formed from a translucent material such as metal or resin painted black, and has a rectangular frame-shaped first light-shielding portion 2031 that covers the periphery of the light guide plate 2002, and a plurality of elongated second light-shielding portions 2032 that extend in the X-axis direction of the light-emitting portion EP of the translucent plate 2004. Each of the plurality of second light-shielding portions 2032 covers the light-emitting portion EP of the light guide plate 2002 so as to extend along the longitudinal direction of the light-emitting portion EP, i.e., along the X-axis direction, from one end to the other in the longitudinal direction of the light-emitting portion EP of the translucent plate 2004. Here, it is preferable that the number of plurality of second light-shielding portions 2032 is four or less. Furthermore, it is preferable that the ratio of the width of the second light-shielding portions 2032 to the length in the short direction of the face on the +Y direction side of the translucent plate 2004 is 0.06 or less. Furthermore, the multiple second light-shielding portions 2032 are arranged at equal intervals along the shorter direction of the light-emitting portion EP of the translucent sheet 2004, i.e., along the Z-axis direction. The ratio of the distance between two adjacent second light-shielding portions 2032 in the Z-axis direction to the length of the light-emitting portion EP of the translucent sheet 2004 in the Z-axis direction is preferably 0.15 or less. Also, if there are three or more second light-shielding portions 2032, the ratio of the distance between each of the multiple second light-shielding portions 2032 located at both ends in the Z-axis direction and the first light-shielding portion 2031 of the translucent sheet 2004 in the Z-axis direction to the length of the light-emitting portion EP in the Z-axis direction is preferably 0.15 or less.

[0030] Next, the performance of the lighting devices according to Examples 5 to 7 of this embodiment will be described in comparison with the performance of the lighting devices according to Comparative Examples 4 to 10. The lighting devices according to Comparative Examples 4 to 10 are the same as the lighting device 2100 according to this embodiment, except for the surface light source 2010. The lighting device according to Comparative Example 4 has a light-shielding mask 9203A that covers the periphery of the translucent plate 2004, as shown in Figure 12(A). The length of one side L92A of the square-shaped light guide plate 2002 in plan view is 200 mm, and the length of one side W92A of the square-shaped portion in plan view that is not covered by the light-shielding mask 9203A on the Y-direction side of the translucent plate 2004 is 180 mm. The width of the light-shielding mask 9203A is 10 mm. As shown in Figure 12(B), the lighting device according to Comparative Example 5 has a light-shielding mask 9203B having a first light-shielding portion 9231B that covers the periphery of the translucent plate 2004, and two second light-shielding portions 9232B that extend in the Z-axis direction inside the first light-shielding portion 9231B. The distance between the second light-shielding portion 9232B and the portion of the first light-shielding portion 9231B that is adjacent to the second light-shielding portion 9232B in the X-axis direction and extends in the Z-axis direction is equal to the distance between two adjacent second light-shielding portions 9232B. The length W92B of each of the three rectangular portions in plan view that are not covered by the light-shielding mask 9203B on the +Y-direction side surface of the translucent plate 2004 and extend in the Z-axis direction is 53.3 mm. The length in the Z-axis direction of this portion is 180 mm. Furthermore, the widths of both the first light-shielding portion 9231B and the second light-shielding portion 9232B were set to 10 mm. The lighting device according to Comparative Example 6 has a light-shielding mask 9203C having a first light-shielding portion 9231C that covers the periphery of the translucent plate 2004, and four second light-shielding portions 9232C that extend in the Z-axis direction inside the first light-shielding portion 9231C. The four second light-shielding portions 9232C are arranged in parallel at equal intervals. The distance between the two second light-shielding portions 9232C located at both ends in the X-axis direction of the four second light-shielding portions 9292C and the portion of the first light-shielding portion 9231C that is adjacent to each of the two second light-shielding portions 9232C in the X-axis direction and extends in the Z-axis direction is equal to the distance between two adjacent second light-shielding portions 9232C.The length W92C in the X-axis direction of each of the five rectangular portions in plan view that extend in the Z-axis direction and are not covered by the light-shielding mask 9203C on the +Y-direction side of the translucent plate 2004 was set to 28 mm. The length in the Z-axis direction of these portions was set to 180 mm. The widths of the first light-shielding portion 9231C and the second light-shielding portion 9232C were both set to 10 mm. The lighting device according to Comparative Example 7 has a light-shielding mask 9203D having a first light-shielding portion 9231D that covers the periphery of the translucent plate 2004, and eight second light-shielding portions 9232D that extend in the Z-axis direction inside the first light-shielding portion 9231D. The second light-shielding portions 9232D are arranged in parallel at equal intervals. The distance between the two second light-shielding sections 9232D located at both ends of the eight second light-shielding sections 9292D in the X-axis direction and the portion of the first light-shielding section 9231D that is adjacent to each of these two second light-shielding sections 9232D in the X-axis direction and extends in the Z-axis direction is equal to the distance between two adjacent second light-shielding sections 9232D. The length W92D in the X-axis direction of each of the nine rectangular portions in plan view that are not covered by the light-shielding mask 9203D on the +Y direction side of the translucent semi-transparent plate 2004 and extend in the Z-axis direction is 11.1 mm. The length in the Z-axis direction of these portions is 180 mm. The width of both the first light-shielding section 9231D and the second light-shielding section 9232D is 10 mm.

[0031] The lighting device according to Example 5, as shown in Figure 12(E), has a light-shielding mask 2003A having a first light-shielding portion 2031A that covers the periphery of a translucent plate 2004 which is square in plan view, and two second light-shielding portions 2032B that extend in the X-axis direction inside the first light-shielding portion 2031A. Here, the length L21A of one side of the translucent plate 2004 is 200 mm. The distance between the second light-shielding portion 2032B and the portion of the first light-shielding portion 2031B that is adjacent to the second light-shielding portion 2032B in the X-axis direction and extends in the Z-axis direction is equal to the distance between two adjacent second light-shielding portions 2032B. The length W21A in the Z-axis direction of each of the three rectangular portions in plan view that are not covered by the light-shielding mask 2003A on the +Y direction side of the light guide plate 2002 and extend in the X-axis direction is 53.3 mm. The length of this portion in the X-axis direction was set to 180 mm. The widths of the first light-shielding portion 2031A and the second light-shielding portion 2032A were both set to 10 mm. As shown in Figure 12(F), the lighting device according to Embodiment 6 has a light-shielding mask 2003B having a first light-shielding portion 2031B that covers the periphery of the translucent plate 2004, and four second light-shielding portions 2032B that extend in the X-axis direction inside the first light-shielding portion 2031B. The four second light-shielding portions 2032B are arranged in parallel at equal intervals. The distance between the two second light-shielding portions 2032B located at both ends in the Z-axis direction and the portion of the first light-shielding portion 2031B that is adjacent to each of the two second light-shielding portions 2032B in the Z-axis direction and extends in the X-axis direction is equal to the distance between two adjacent second light-shielding portions 2032B. The length W21B in the Z-axis direction of each of the five rectangular portions in plan view that extend in the X-axis direction and are not covered by the light-shielding mask 2003B on the +Y-direction side of the translucent plate 2004 was set to 28 mm. The length in the X-axis direction of these portions was set to 180 mm. The widths of the first light-shielding portion 2031B and the second light-shielding portion 2032B were both set to 10 mm. As shown in Figure 13(A), the lighting device according to Embodiment 7 has a light-shielding mask 2003C having a first light-shielding portion 2031C that covers the periphery of the translucent plate 2004, and eight second light-shielding portions 2032C that extend in the X-axis direction inside the first light-shielding portion 2031C. The second light-shielding portions 2032C are arranged in parallel at equal intervals.The distance between the two second light-shielding sections 2032C located at both ends in the Z-axis direction of the eight second light-shielding sections 2032C and the portion of the first light-shielding section 2031C that is adjacent to each of these two second light-shielding sections 2032C in the Z-axis direction and extends in the X-axis direction is equal to the distance between two adjacent second light-shielding sections 2032C. The length W21C in the Z-axis direction of each of the nine rectangular portions in plan view that are not covered by the light-shielding mask 2003C on the +Y direction side of the translucent semi-transparent plate 2004 and extend in the Z-axis direction was set to 11.1 mm. The length in the X-axis direction of these portions was set to 180 mm. The width of both the first light-shielding section 2031C and the second light-shielding section 2032C was set to 10 mm.

[0032] As shown in Figure 13(B), the lighting device of Comparative Example 8 includes a light-shielding mask 9203E in which square-shaped openings in a plan view are arranged in 3 rows and 3 columns at equal intervals. The length of one side W92E of each opening is 53.3 mm. The width of the portion surrounding each opening in the light-shielding mask 9203E is 10 mm. As shown in Figure 13(C), the lighting device of Comparative Example 9 includes a light-shielding mask 9203F in which square-shaped openings in a plan view are arranged in 5 rows and 5 columns at equal intervals. The length of one side W92F of each opening is 28 mm. The width of the portion surrounding each opening in the light-shielding mask 9203F is 10 mm. As shown in Figure 13(D), the lighting device of Comparative Example 10 includes a light-shielding mask 9203G in which square-shaped openings in a plan view are arranged in 9 rows and 9 columns at equal intervals. The length of one side W92G of each opening is 11.1 mm. The width of the portion surrounding each opening in the light-shielding mask 9203G was set to 10 mm in all cases. Furthermore, the size of the light guide plate, the shape of the light-shielding portion, the number of second light-shielding portions constituting part of the light-shielding portion, and the total number of photons emitted from the lighting device during operation for the lighting devices of Comparative Examples 4 to 10 and Examples 5 to 7 are shown in Table 2 below. Here, "vertical stripe" in "shape of light-shielding portion" refers to a shape in which the second light-shielding portion extends in the vertical direction, as shown in Figures 12(B), (C), and (D). Also, "horizontal stripe" in "shape of light-shielding portion" refers to a shape in which the second light-shielding portion extends in the horizontal direction, as shown in Figures 12(E), (F) and Figure 13(A). Furthermore, "lattice-like" in "shape of light-shielding portion" refers to a shape in which the second light-shielding portion extends in the vertical and horizontal directions, resulting in an overall lattice-like shape, as shown in Figures 13(B), (C), and (D). Furthermore, "○ vertical" in "Number of light-blocking sections" indicates that there are ○ second light-blocking sections extending vertically. In addition, "○ horizontal" in "Number of light-blocking sections" indicates that there are ○ second light-blocking sections extending horizontally. Furthermore, "○ vertical and horizontal" in "Number of light-blocking sections" indicates that there are ○ second light-blocking sections extending vertically and ○ second light-blocking sections extending horizontally.

[0033] [Table 2]

[0034] Here, we will explain the results of an experiment comparing the insect attraction performance of each lighting device according to Comparative Examples 4 to 10 and Examples 5 to 7. In this experiment, similar to Embodiment 1, the number of houseflies or phorid flies attracted to each of the two lighting devices selected from Comparative Examples 4 to 10 and Examples 5 to 7 was measured in an environment where many houseflies or phorid flies were present. The experiment was conducted four times for each combination of two lighting devices, and the average number of measured flies was calculated. Furthermore, the four experiments were conducted twice with the two lighting devices in a predetermined arrangement, and then twice with the arrangement of the two lighting devices swapped. As shown in Figure 14(A), it was found that the lighting device according to Comparative Example 8 had lower attraction performance for houseflies than the lighting device according to Comparative Example 4, but had higher attraction performance for phorid flies than the lighting device according to Comparative Example 4. As shown in Figure 14(B), the lighting device according to Comparative Example 9 had the same attraction performance for houseflies as the lighting device according to Comparative Example 4, but it was found to have lower attraction performance for phorid flies compared to the lighting device according to Comparative Example 4. As shown in Figure 14(C), the lighting device according to Comparative Example 10 was found to have lower attraction performance for both houseflies and phorid flies than the lighting device according to Comparative Example 4. As shown in Figure 15(A), the lighting device according to Example 5 was found to have the same attraction performance for both houseflies and phorid flies as the lighting device according to Comparative Example 4. As shown in Figure 15(B), the lighting device according to Example 6 was found to have higher attraction performance for both houseflies and phorid flies than the lighting device according to Comparative Example 4. As shown in Figure 15(C), the lighting device according to Example 7 was found to have lower attraction performance for both houseflies and phorid flies than the lighting device according to Comparative Example 4.

[0035] As shown in Figure 16(A), the lighting device according to Comparative Example 5 was found to have lower attraction performance for both houseflies and phorid flies than the lighting device according to Comparative Example 4. As shown in Figure 16(B), the lighting device according to Comparative Example 6 was found to have lower attraction performance for both houseflies and phorid flies than the lighting device according to Comparative Example 4. As shown in Figure 16(C), the lighting device according to Comparative Example 7 was found to have lower attraction performance for both houseflies and phorid flies than the lighting device according to Comparative Example 4. As shown in Figure 17(A), the lighting device according to Example 5 was found to have higher attraction performance for both houseflies and phorid flies than the lighting device according to Comparative Example 5. As shown in Figure 17(B), the lighting device according to Example 6 was found to have higher attraction performance for both houseflies and phorid flies than the lighting device according to Comparative Example 6. As shown in Figure 17(C), the lighting device according to Example 7 was found to have lower attraction performance for both houseflies and phorid flies than the lighting device according to Comparative Example 7. From this, it was found that the shape of the portion of the light guide plate 2002 not covered by the light-shielding mask tends to have higher attraction performance when the horizontal length is longer than the vertical length, compared to when the horizontal length is shorter than the Z-axis length.

[0036] As described above, according to the lighting device 2100 of this embodiment, the light-shielding mask 2003 has a plurality of second light-shielding portions 2032 that are formed in an elongated shape and cover the light-emitting portion EP of the light guide plate 2002 of the surface light-emitting light source 2010 so as to extend horizontally from one end to the other in the horizontal direction of the light-emitting portion EP on the +Y direction side. This makes it possible to enhance the insect-attracting effect.

[0037] (Embodiment 3) The lighting device according to this embodiment differs from the lighting device 100 according to Embodiment 1 in that the surface-emitting light source has a plurality of first light-emitting portions that are elongated in plan view, and a plurality of second light-emitting portions that are located between two adjacent first light-emitting portions and on the outside in the direction of alignment of the plurality of first light-emitting portions, and whose light intensity is smaller than that of the first light-emitting portions. Here, the lighting body supports the surface-emitting light source in a position where the longitudinal direction of the first light-emitting portions is perpendicular to the vertical direction.

[0038] As shown in Figure 18, the lighting device 3100 according to this embodiment comprises a surface-emitting light source 3010 and a lighting body 103 that supports the surface-emitting light source 3010, and is installed on the ground F. In Figure 18, components similar to those in Embodiments 1 and 2 are denoted by the same reference numerals as in Figures 1 and 10.

[0039] The surface-emitting light source 3010 comprises two light-emitting modules 1, a light guide plate 2002 which is approximately square in plan view, a dimming filter 3003, two light-shielding covers 3, and a translucent plate 2004 which is approximately square in plan view. The dimming filter 3003 is rectangular in plan view and is made of a translucent material that absorbs a portion of the white light, thereby attenuating the light emitted from the light-emitting portion on the +Y direction side of the translucent plate 2004. The dimming filter 3003 covers the +Y direction side of the translucent plate 2004 so as to extend along the X-axis direction from one end to the other in the X-axis direction of the translucent plate 2004. Here, the first light-emitting portion SEP1 of the surface-emitting light source 3010 is the portion of the light guide plate 2002 on the +Y direction side that is not covered by the dimming filter 3003, and the second light-emitting portion SEP2 is the portion of the translucent plate 2004 on the +Y direction side that is covered by the dimming filter 3003.

[0040] The lighting body 103 supports the surface light source 3010 in a position where the longitudinal direction of the first light-emitting portion SEP1 is perpendicular to the vertical direction, that is, in a position where the longitudinal direction of the first light-emitting portion SEP1 is horizontal with respect to the ground F.

[0041] Next, the performance of the lighting device according to Example 8 of this embodiment will be described in comparison with the performance of the lighting devices according to Comparative Examples 11 and 12. The lighting devices according to Comparative Examples 11 and 12 are the same as the lighting device 3100 according to this embodiment, except for the surface light source 3010. The lighting device according to Example 8 includes a surface light source 3010A having three dimming filters 3003 that extend in the X-axis direction and cover the +Y direction side of the translucent plate 2004, as shown in Figure 19(A). The length of one side L31A of the translucent plate 2004, which is square in plan view, is 200 mm. The lighting device according to Comparative Example 11 includes a surface light source 9310A having a dimming filter 9303A that covers the entire +Y direction side of the translucent plate 2004, as shown in Figure 19(B). The length of one side L93A of the translucent plate 2004, which is square in plan view, is 200 mm. As shown in Figure 19(C), the lighting device according to Comparative Example 12 includes a surface-emitting light source 9310B having three light-reducing filters 3003 that extend in the Z-axis direction and cover the +Y direction side of the translucent semi-transparent plate 2004. Furthermore, Table 3 below summarizes the size of the light guide plate of the lighting device and the total number of photons emitted from the lighting device during operation for the lighting devices according to Comparative Examples 11 and 12 and Example 8.

[0042] [Table 3]

[0043] Here, we will describe the results of an experiment comparing the insect attraction performance of the lighting devices according to Comparative Examples 11 and 12 and Example 8. In this experiment, similar to Embodiment 1, the number of houseflies or phorid flies attracted to each of the two lighting devices selected from Comparative Examples 11 and 12 and Example 8 was measured in an environment where many houseflies or phorid flies were present. The experiment was conducted four times for each combination of two lighting devices, and the average number of measured flies was calculated. Furthermore, the four experiments were conducted twice with the two lighting devices in a predetermined arrangement, and then twice with the arrangement of the two lighting devices swapped. As shown in Figure 20(A), it was found that the lighting device according to Comparative Example 11 had higher attraction performance for both houseflies and phorid flies than the lighting device according to Comparative Example 12. As shown in Figure 20(B), it was found that the lighting device according to Example 8 had higher attraction performance for both houseflies and phorid flies than the lighting device according to Comparative Example 11. As shown in Figure 20(C), the lighting device according to Example 8 was found to have a higher attraction performance for both houseflies and phorid flies than the lighting device according to Comparative Example 12.

[0044] As described above, according to the lighting device 3100 of this embodiment, the surface-emitting light source 3010 has a plurality of first light-emitting portions SEP1 which are elongated in plan view, and a plurality of second light-emitting portions SEP2 which are located between two adjacent first light-emitting portions SEP1 and on the outside in the direction of alignment of the plurality of first light-emitting portions SEP1, and whose light intensity is smaller than that of the first light-emitting portions SEP1. The lighting body 103 supports the surface-emitting light source 3010 in a position in which the longitudinal direction of the first light-emitting portions SEP1 is perpendicular to the vertical direction. This makes it possible to enhance the insect-attracting effect.

[0045] (Embodiment 4) The window according to this embodiment is used, for example, when installed on the exterior wall of a building. This window has a light-transmitting portion that is rectangular in plan view and made of a light-transmitting material, and the ratio of the length of the long side to the length of the short side of the light-transmitting portion in plan view is greater than 2 and less than 6. Here, the light-transmitting portion is processed to have a function of scattering and diffusing transmitted light, for example, like a translucent sheet.

[0046] Furthermore, the window according to this embodiment may also comprise a window body having a light-transmitting portion formed in a rectangular shape in plan view from a light-transmitting material, and a light-shielding mask having a plurality of light-shielding portions formed in an elongated shape from a non-light-transmitting material, extending horizontally from one end to the other in a horizontal direction perpendicular to the vertical direction of the light-transmitting portion, covering the light-transmitting portion. Here, the light-transmitting portion is processed to have a function of scattering and diffusing transmitted light, for example, like a translucent sheet. Furthermore, it is preferable that the number of light-shielding portions be four or less. Furthermore, it is preferable that the ratio of the width of the light-shielding portions to the length of the light-transmitting portion in the short direction is 0.06 or less. Moreover, it is preferable that the plurality of light-shielding portions are arranged at equal intervals along the short direction of the light-transmitting portion, and that the ratio of the distance between two adjacent light-shielding portions in the short direction of the light-transmitting portion, and the ratio of the distance between each of the light-shielding portions located at both ends in the direction in which the plurality of light-shielding portions are arranged and the edges of the light-transmitting portion in the short direction to the length of the light-emitting portion in the short direction is 0.15 or less.

[0047] The window according to this embodiment, when installed on the exterior wall of a building, can enhance its insect-attracting effect, especially at night.

[0048] Although various embodiments of the present invention have been described above, the present invention is not limited to the configurations of the embodiments described above. For example, the surface light sources 10, 2010, and 3010 may each utilize sheet-shaped organic electroluminescent (EL) elements.

[0049] In Embodiment 1, an example was described in which the lighting body 103 supports the surface light source 10 in a position where the longitudinal direction of the light-emitting portion EP of the surface light source 10 is perpendicular to the vertical direction. However, the position of the surface light source 10 is not limited to this. For example, the lighting body may support the surface light source 10 in a position where the longitudinal direction of the light-emitting portion EP of the surface light source 10 intersects with the vertical direction, that is, in a position where the longitudinal direction is inclined or perpendicular to the ground F. Also, in Embodiment 3, an example was described in which the lighting body 103 supports the surface light source 3010 in a position where the longitudinal direction of the first light-emitting portion SEP1 is perpendicular to the vertical direction, that is, in a position where the longitudinal direction of the first light-emitting portion SEP1 is horizontal to the ground F. However, the position of the surface light source 3010 is not limited to this. For example, the lighting body may support the surface light source 10 in a position where the longitudinal direction of the first light-emitting portion SEP1 of the surface light source 3010 intersects with the vertical direction, that is, in a position where the longitudinal direction is inclined or perpendicular to the ground F.

[0050] In Embodiment 2, an example was described in which the light-shielding mask 2003 has a first light-shielding portion 2031. However, the invention is not limited to this, and for example, the light-shielding mask may consist only of a plurality of second light-shielding portions. In this case, it is preferable that the ratio of the distance between two adjacent second light-shielding portions, and the distance between each of the second light-shielding portions located at both ends in the direction in which the plurality of second light-shielding portions are aligned, and the ends of the light guide plate 2002 in the short direction, to the length in the Z-axis direction is 0.15 or less.

[0051] Embodiment 3 describes a configuration that includes multiple light-reducing filters 3003, but the invention is not limited thereto. For example, the surface light source may have a plurality of first sub-light sources that are elongated and arranged so that their longitudinal direction is aligned with the horizontal direction, and a second sub-light source that is positioned between the plurality of sub-light sources and has a lower light emission intensity than the first sub-light sources.

[0052] Embodiment 3 describes an example in which the surface-emitting light source 3010 has a dimming filter 3003. However, the invention is not limited to this, and the surface-emitting light source may not have a dimming filter 3003, but instead have a light guide plate body (not shown) with alternating portions of different thicknesses.

[0053] Embodiment 4 described a window that attracts insects, but the invention is not limited to this, and a window with a high insect-repelling effect may also be used. The window according to this modified example has a light-transmitting portion that is rectangular in plan view and made of a light-transmitting material, and the ratio of the length of the long side to the length of the short side in the plan view of the light-transmitting portion is 1 or more and 2 or less. Here, the light-transmitting portion is processed in the same way as in Embodiment 4 to have the function of scattering and diffusing the transmitted light.

[0054] Furthermore, the window according to this modified example may comprise a window body having a light-transmitting portion formed in a rectangular shape in plan view from a light-transmitting material, and a light-shielding mask having a plurality of light-shielding portions formed in an elongated shape from a non-light-transmitting material and extending vertically from one end to the other in the vertical direction of the light-transmitting portion, covering the light-transmitting portion. Here, the light-transmitting portion is processed to have the function of scattering and diffusing transmitted light, similar to Embodiment 4. Furthermore, the window according to this modified example may comprise a window body having a light-transmitting portion formed in a rectangular shape in plan view from a light-transmitting material, and a light-shielding mask having light-shielding portions formed in a grid pattern from a non-light-transmitting material. The light-shielding mask may have a plurality of square-shaped openings arranged in a grid pattern at an angle of 45 degrees to the vertical. Alternatively, the light-shielding mask may have a shape in which a portion of the plurality of grid-like openings is shielded from light.

[0055] The window according to this embodiment, when installed on the exterior wall of a building, can enhance the insect repellent effect, especially at night.

[0056] Although embodiments and variations of the present invention have been described above, the present invention is not limited thereto. The present invention includes embodiments and variations that are appropriately combined, and those that are appropriately modified thereto. [Industrial applicability]

[0057] This invention is suitable as a lighting device for preventing insect damage caused by insects. [Explanation of Symbols]

[0058] 1: Light-emitting module, 2, 2A, 2B, 2C, 2D, 2002: Light guide plate, 3: Light-shielding cover, 4: Semi-transparent plate, 10, 10A, 10B, 10C, 10D, 2010, 3010: Surface-emitting light source, 11: Cover, 11e: Inside, 12: Cap, 12a: Inlet hole, 21: Circuit board, 21a: Both ends, 21b: First main surface, 21c: Second main surface, 22: Light-emitting part, 22a: Light-emitting element, 22b: Main body, 22c: Recess, 23: Current limiting element, 201, 2201: Light guide plate body, 2 02: Reflective film, 211: Electrode, 100, 2100, 3100: Lighting device, 101: Holding part, 102: Support, 103: Lighting body, 2003, 2003A, 2003B, 2003C: Light-shielding mask, 2031, 2031A, 2031B, 2031C: First light-shielding part, 2032, 2032A, 2032B, 2032C: Second light-shielding part, 3003: Light-reducing filter, EP: Light-emitting part, F: Ground, PL1: Power line, SEP1: First light-emitting part, SEP2: Second light-emitting part

Claims

1. It is equipped with a surface-emitting light source having a long rectangular light-emitting portion in plan view, The ratio of the length of the longer side to the length of the shorter side in a plan view of the aforementioned light-emitting portion is greater than 2 and less than 6. Lighting device.

2. The lighting body further comprises a lighting body that supports the surface light source in a position where the longitudinal direction of the light-emitting portion is perpendicular to the vertical direction. The lighting device according to claim 1.

3. A surface-emitting light source having a rectangular light-emitting portion in plan view, A lighting body supporting the aforementioned surface-emitting light source, A light-shielding mask comprising: a light-shielding mask formed in an elongated shape from a non-transparent material and having a plurality of light-shielding portions that cover the light-emitting portion so as to extend along the horizontal direction from one end to the other in a horizontal direction perpendicular to the vertical direction of the light-emitting portion; Lighting device.

4. The number of the multiple light-shielding parts is four or less. The lighting device according to claim 3.

5. The ratio of the width of the light-shielding portion to the length of the light-emitting portion in the shorter direction is 0.06 or less. The lighting device according to claim 4.

6. Multiple light-shielding portions are arranged at equal intervals along the shorter direction of the light-emitting portion. The distance between two adjacent light-shielding portions in the short-side direction of the light-emitting portion, and the ratio of the distance between each of the light-shielding portions located at both ends in the direction in which the multiple light-shielding portions are aligned and the edges of the light-emitting portion in the short-side direction, to the length of the light-emitting portion in the short-side direction, is 0.15 or less. The lighting device according to any one of claims 3 to 5.

7. The surface light source comprises a plurality of first light-emitting portions having an elongated shape in plan view, and a plurality of second light-emitting portions located between two adjacent first light-emitting portions and on the outside in the direction of alignment of the plurality of first light-emitting portions, and having a light intensity less than that of the first light-emitting portions. Lighting device.

8. The lighting body further comprises supporting the surface light source in a position where the longitudinal direction of the first light-emitting portion is perpendicular to the vertical direction. The lighting device according to claim 7.

9. The surface light source is formed in an elongated shape from a translucent material that attenuates light propagating in the thickness direction, and further comprises a plurality of light-reducing filters that cover the second light-emitting portion so as to extend along the horizontal direction from one end to the other in a horizontal direction perpendicular to the vertical direction of the second light-emitting portion. The lighting device according to claim 7.

10. The aforementioned surface-emitting light source is A light-emitting module having a light-emitting part, It has a long rectangular plate shape and a light guide plate that guides light incident inward from the light-emitting portion of the light-emitting module, which is positioned opposite to at least one end in the longitudinal or transverse direction perpendicular to the thickness direction. The lighting device according to any one of claims 1 to 5 or 7 to 9.

11. It has a light-transmitting portion formed in a rectangular shape in plan view from a translucent material, The ratio of the length of the longer side to the length of the shorter side in a plan view of the light-transmitting portion is greater than 2 and less than 6. window.

12. A window body having a light-transmitting portion formed in a rectangular shape in plan view from a translucent material, A light-shielding mask comprising: a light-shielding mask formed in an elongated shape from a non-transparent material and having a plurality of light-shielding portions that cover the light-transmitting portion so as to extend along the horizontal direction from one end to the other in a horizontal direction perpendicular to the vertical direction of the light-transmitting portion; window.

13. It has a light-transmitting portion formed in a rectangular shape in plan view from a translucent material, The ratio of the length of the longer side to the length of the shorter side in a plan view of the light-transmitting portion is 1 or more and 2 or less. window.

14. A window body having a light-transmitting portion formed in a rectangular shape in plan view from a translucent material, A light-shielding mask having a plurality of light-shielding portions formed in an elongated shape from a non-transparent material and extending along the vertical direction from one end to the other of the light-transmitting portion, covering the light-transmitting portion, or a light-shielding mask having light-shielding portions formed in a grid pattern from a non-transparent material. window.

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