Lighting device

Abstract

To provide a lighting device with enhanced insect-attracting properties. [Solution] The lighting device 100 includes a light source module having two long first light sources that emit first light with maximum relative intensity in the wavelength band of 340 nm to 400 nm, and a long second light source that emits both first and second light with maximum relative intensity in the wavelength band of 460 nm to 530 nm. The two first light sources are positioned to the sides of both ends in the longitudinal direction of the second light source, with their respective longitudinal directions coinciding with the longitudinal direction of the second light source.

Description

Technical Field

[0006]

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

Background Art

[0002] An insect attracting lamp has been proposed that includes a cylindrical light-transmitting tube and a long LED mounting substrate in which a plurality of LED chips that emit light having a wavelength in the range of 300 to 700 nm, which is the visible range of insects, are mounted (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, there is a demand for a higher insect attracting effect in the insect attracting lamp as described in Patent Document 1.

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

Means for Solving the Problems

[0006] To achieve the above object, a lighting device according to the present invention includes <00000¾>two long first light sources that emit first light having a maximum relative intensity in a wavelength band of 340 nm or more and 400 nm or less, and a long second light source that emits second light having a maximum relative intensity in a wavelength band of 460 nm or more and 530 nm or less or both the first light and the second light, and includes a light source module having The two first light sources are respectively arranged on both end sides in the longitudinal direction of the second light source in a state where the longitudinal direction thereof coincides with the longitudinal direction of the second light source. [Effects of the Invention]

[0007] According to the present invention, the two first light sources described above are arranged to the sides of both ends in the longitudinal direction of the second light source, with their respective longitudinal directions coinciding with the longitudinal direction of the second light source. This makes it possible to enhance the insect attraction effect compared to an illumination device that emits first light with maximum relative intensity in the wavelength band of 340 nm to 400 nm. [Brief explanation of the drawing]

[0008] [Figure 1] This is a schematic diagram showing an example of a lighting device according to Embodiment 1 of the present invention. [Figure 2] The light source module according to Embodiment 1 is shown, where (A) is a plan view and (B) is a perspective view. [Figure 3] This is a cross-sectional view of the light source module according to Embodiment 1, taken along line AA in Figure 2(A). [Figure 4] (A) is a schematic diagram of the light source module according to Comparative Example 1, (B) is a schematic diagram of the light source module according to Comparative Example 2, (C) is a schematic diagram of the light source module according to Examples 1 to 3, and (D) is a schematic diagram of the light source module according to Comparative Example 3. [Figure 5] (A) is a figure showing the wavelength spectrum of light emitted from the lighting devices according to Comparative Examples 1 to 3 and Example 1, and (B) is a figure showing the wavelength spectrum of light emitted from the lighting devices according to Comparative Example 1 and Examples 1 to 3. [Figure 6] The results of experiments to attract houseflies and phorid flies using the lighting devices described in Comparative Examples 1 to 3 and Example 1 are shown below. (A) shows the results for Comparative Examples 1 and 2, (B) shows the results for Comparative Examples 1 and 3, and (C) shows the results for Comparative Example 1 and Example 1. [Figure 7]The results of experiments to attract houseflies and phorid flies using the lighting devices described in Examples 1 to 3, 8 and Comparative Example 1 are shown below. (A) shows the results for Examples 1 and 3, (B) shows the results for Examples 1 and 2, and (C) shows the results for Example 8 and Comparative Example 1. [Figure 8] This figure shows the wavelength spectrum of light emitted from the lighting devices according to Comparative Examples 4 and 5 and Example 9. [Figure 9] (A) is a figure showing the results of experiments to attract houseflies and phorid flies using the lighting devices according to Comparative Example 5 and Example 9, and (B) is a figure showing the results of experiments to attract insects using the lighting devices according to Comparative Example 6 and Comparative Example 7. [Figure 10] This is a schematic diagram showing an example of a lighting device according to Embodiment 2 of the present invention. [Figure 11] This is a schematic diagram showing another example of a lighting device according to Embodiment 2. [Figure 12] The light source module according to Embodiment 2 is shown, where (A) is a plan view and (B) is a perspective view. [Figure 13] This is a cross-sectional view of the light source module according to Embodiment 2, taken along the line BB in Figure 12(A). [Figure 14] This figure shows the wavelength spectrum of light emitted from the lighting devices according to Comparative Example 1 and Examples 4 to 7. [Figure 15] The results of experiments to attract houseflies and phorid flies using the lighting devices described in Comparative Example 1 and Examples 4 and 5 are shown below. (A) is a figure showing the results for Comparative Example 1 and Example 4, and (B) is a figure showing the results for Comparative Example 1 and Example 5. [Figure 16] The results of experiments to attract houseflies and phorid flies using the lighting devices described in Comparative Example 1 and Examples 6 and 7 are shown below. (A) is a figure showing the results for Comparative Example 1 and Example 6, and (B) is a figure showing the results for Comparative Example 1 and Example 7. [Modes for carrying out the invention]

[0009] (Embodiment 1) The following describes an embodiment of the present invention of a lighting device with reference to the attached drawings. The lighting device according to this embodiment comprises a light source module having at least one light-emitting unit that emits first light having maximum relative intensity in a wavelength band of 340 nm to 400 nm, and a long light-transmitting window positioned opposite the at least one light-emitting unit in the direction of emission of the first light, and a lighting body that supports the light source module in a position where the longitudinal direction of the light-transmitting window is perpendicular to the vertical direction. The light-transmitting window contains a fluorescent or phosphorescent material that is translucent and emits second light having maximum relative intensity in a wavelength band of 460 nm to 530 nm when excited by the first light emitted from at least one light-emitting unit, and also has a wavelength conversion unit located in the center in the longitudinal direction of the light-transmitting window, and transparent units that are transparent to the first light and allow the first light emitted from at least one light-emitting unit to pass through as is, and are located on both sides of the wavelength conversion unit in the longitudinal direction of the light-transmitting window. Here, two long first light sources are configured, each emitting first light with maximum relative intensity in the wavelength band between 340 nm and 400 nm, from at least one light-emitting section and a wavelength conversion section of a light-transmitting window. Additionally, a long second light source is configured, each emitting second light with maximum relative intensity in the wavelength band between 460 nm and 530 nm, from at least one light-emitting section and two transparent sections on either side of the wavelength conversion section of the light-transmitting window.

[0010] As shown in Figure 1, the lighting device 100 according to this embodiment comprises a light source module 1 and a lighting body 103 that supports the light source module 1, and is installed on the ground F.

[0011] As shown in FIGS. 2(A) and (B), the light source 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 light transmissive cover 11 that has flexibility and functions as a light transmissive window of the light source module 1. Further, the light source module 1 includes caps 12 that are attached to both end portions in the longitudinal direction of the light transmissive cover 11 and seal the inside of the light transmissive cover 11. The caps 12 are formed of, for example, a resin material and have a bottomed rectangular tubular shape. An introduction hole 12a for introducing a power line PL1 is provided in the bottom wall of the cap 12. The dimensions of the inner cross section of the cap 12 are larger than the outer dimensions of the cross section of the light transmissive cover 11, and the caps 12 are attached so as to cover both end portions in the longitudinal direction of the light transmissive cover 11. The power line PL1 led out from the cap 12 is connected to a power supply device included in the illumination main body 103 described later.

[0012] The circuit board 21 is formed of, for example, FPC (Flexible Printed Circuits) and has a conductor pattern (not shown) formed thereon. Electrodes 211 that are electrically connected to the power line PL1 are provided at both end portions in the longitudinal direction of the circuit board 21.

[0013] The light emitting unit 22 is composed of, for example, a SMD (Surface Mount Device) type LED (Light Emitting Diode) light emitting device. The light emitting unit 22 has a main body 22b which is rectangular plate-shaped and has a circular recess 22c formed on one side in the thickness direction in plan view, a light emitting element 22a disposed at the bottom of the recess 22c, and a transparent member (not shown) that is transparent to light in a wavelength band of 340 nm or more and 400 nm or less filled in the recess 22c. As the light emitting element 22a, an LED element that emits ultraviolet light which is the first light having the maximum relative intensity in a wavelength band of 340 nm or more and 400 nm or less is adopted. A plurality of light emitting units 22 are mounted in a row 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 in parallel via conductor patterns formed on the circuit board 21. The current limiting element 23 is inserted into the conductor pattern formed on the circuit board 21 and limits the current flowing through the light emitting element 22a to a preset magnitude. When current flows through the light emitting element 22a from the power supply device through the power line PL1 and the conductive pattern, the light emitting element 22a lights up.

[0014] The light-transmitting cover 11 is a long cylindrical shape formed from a flexible material, and as shown in Figure 3, the circuit board 21 and a plurality of light-emitting parts 22 are arranged on the inside 11e. As the flexible material, a light-transmitting thermosetting polyurethane resin, silicone resin, etc. can be used. Furthermore, both ends 21a in the short direction of the circuit board 21 are embedded in the light-transmitting cover 11, and the second main surface 21c on the circuit board 21 opposite to the first main surface 21b is in close contact with the light-transmitting cover 11. In addition, as shown in Figures 2(A) and (B), the light-transmitting cover 11 has a wavelength conversion part 111 and a transparent part 112. The wavelength conversion part 111 and the light-emitting parts 22 constitute the long first light source, and the transparent part 112 and the light-emitting parts 22 constitute the long second light source. The wavelength conversion section 111 is transparent and contains a fluorescent or phosphorescent material that, when excited by ultraviolet light emitted from the light-emitting section 22, emits light (second light) with maximum relative intensity in the wavelength band of 460 nm to 530 nm. As the phosphorescent material, for example, a phosphorescent material mainly composed of strontium aluminate can be used. The content of the phosphorescent material in the wavelength conversion section 111 is set to be within the range of 1% to 20%. The transparent section 112 is transparent to ultraviolet light in the wavelength band of 340 nm to 400 nm and transmits the ultraviolet light emitted from the light-emitting section 22 as is. Furthermore, the wavelength conversion section 111 is located in the center of the longitudinal direction of the light-transmitting cover 11, and the transparent section 112 is located adjacent to the wavelength conversion section 111 at two locations on each side of the wavelength conversion section 111 in the longitudinal direction of the light-transmitting cover 11. Here, the transparent portions 112 located on both sides of the wavelength conversion portion 111 have equal lengths in the longitudinal direction of the light-transmitting cover 11. Furthermore, it is preferable that the ratio of the length L11 of the wavelength conversion portion 111 along the longitudinal direction of the light-transmitting cover 11 to the length L12 of the light-transmitting cover 11 in the longitudinal direction be set to more than 25% and less than 50%.

[0015] Returning to Figure 1, the lighting unit 103 includes a holding part 101 for holding the light source module 1, a support body 102 for supporting the holding part 101, and a power supply device (not shown) that supplies power to the light source module 1 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.

[0016] The lighting unit 103 supports the light source module 1 in a position where the longitudinal direction of the light-transmitting cover 11 of the light source module 1 is perpendicular to the vertical direction. That is, the lighting unit 103 supports the light source module 1 so that the longitudinal direction of the light-transmitting cover 11 is horizontal with respect to the ground F. As a result, when the lighting device 100 is viewed from the direction of light emission from the light source module 1, the light source module 1 can be seen as a linear light source extending horizontally with respect to the ground F.

[0017] Next, the performance of the lighting devices according to Examples 1 to 3 and 8 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 have the same configuration as described in the embodiment, except for the light source module. The lighting device according to Comparative Example 1 includes a light source module 9001A having a light-transmitting cover 9011A made of a silicone resin that is transparent to ultraviolet light in the wavelength band of 340 nm to 400 nm, as shown in Figure 4(A). Here, the longitudinal length L9A of the light-transmitting cover 9011A is 213.6 mm. The lighting device according to Comparative Example 2 includes a light source module 9001B in which three wavelength conversion units 9111B and three transparent units 9112B are alternately arranged along the longitudinal direction of the light-transmitting cover 9011B, as shown in Figure 4(A). Here, the longitudinal length L9B1 of the light-transmitting cover 9011B is 213.6 mm, and the longitudinal lengths L9B2 and L9B3 of the wavelength conversion section 9111B and the transparent section 9112B, respectively, are both 35.6 mm. In the lighting device according to Comparative Example 3, as shown in Figure 4(C), one transparent section 9112C is located in the center of the longitudinal direction of the light-transmitting cover 9011C, and the wavelength conversion section 9111C is located at two locations on either side of the transparent section 9112C in the longitudinal direction of the light-transmitting cover 9011C. Here, the longitudinal length L9C1 of the light-transmitting cover 9011B is 213.6 mm, and the longitudinal length L9C2 of the transparent section 9112C is 71.2 mm.

[0018] As shown in Figure 4(D), the lighting devices according to Examples 1 to 3 and 8 have one wavelength conversion unit 111A located in the center of the longitudinal direction of the light-transmitting cover 11A, and transparent parts 112A located at two locations on either side of the wavelength conversion unit 111A in the longitudinal direction of the light-transmitting cover 11A. Here, the longitudinal length L1A1 of the light-transmitting cover 11A is 213.6 mm in all cases. The longitudinal length L1A2 of the wavelength conversion unit 111A in Examples 1 and 8 is 71.2 mm, which is equivalent to 33% of the length L1A1 of the light-transmitting cover 11A. The longitudinal length L1A2 of the wavelength conversion unit 111A in Example 2 is 106.8 mm, which is equivalent to 50% of the length L1A1 of the light-transmitting cover 11A. Furthermore, the longitudinal length L1A2 of the wavelength conversion unit 111A in Example 3 is 53.4 mm. In other words, it is a length equivalent to 25% of the length L1A1 of the light-transmitting cover 11A. Furthermore, in the lighting device according to Example 8, the intensity of light emitted from the wavelength conversion unit 111A was reduced to 50% or less compared to that of Example 1.

[0019] The wavelength spectra of light emitted from the lighting devices of Comparative Examples 2 and 3 and Example 1 all show a shape with a relative intensity peak in the wavelength band of 460 nm to 530 nm, as shown in Figure 5. Similarly, the wavelength spectra of light emitted from the lighting devices of Examples 1 to 3 all show a shape with a relative intensity peak in the wavelength band of 460 nm to 530 nm, as shown in Figure 5(B). Furthermore, Table 1 below shows the position of the wavelength conversion section, the ratio of the wavelength conversion section in the light-transmitting cover, and the total number of photons emitted from the lighting device during operation for the lighting devices of Comparative Examples 1 to 3 and Examples 1 to 3 and 8. Here, "spotted" in "wavelength conversion section position" indicates that the wavelength conversion section and the transparent section are arranged alternately along the longitudinal direction of the light-transmitting cover, as shown in Figure 4(B). Also, "centered" in "wavelength conversion section position" indicates that one wavelength conversion section is located in the center, with transparent sections on both sides, as shown in Figure 4(D). Furthermore, "both ends" in the "wavelength conversion section position" refers to the fact that, as shown in Figure 4(C), one transparent section is located in the center, with wavelength conversion sections positioned on both sides of it.

[0020] [Table 1]

[0021] 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 3. 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 3 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 6(A), it was found that the lighting device according to Comparative Example 1 had higher attraction performance for both houseflies and phorid flies compared to the lighting device according to Comparative Example 2. As shown in Figure 6(B), it was found that the lighting device according to Comparative Example 3 had comparable attraction performance for both houseflies and phorid flies compared to the lighting device according to Comparative Example 1. As shown in Figure 6(C), it was found that the lighting device according to Example 1 had a higher attraction performance, particularly for houseflies, compared to the lighting device according to Comparative Example 1.

[0022] Furthermore, as shown in Figures 7(A) and (B), it was found that the lighting device according to Example 1 had a higher attraction performance for both houseflies and phorid flies compared to the lighting devices according to Examples 2 and 3. From these results, it can be seen that a lighting device equipped with a light source module in which one wavelength conversion unit is located in the center of the longitudinal direction of the light-transmitting cover, transparent units are located at two locations on either side of the wavelength conversion unit in the longitudinal direction of the light-transmitting cover, and the longitudinal length of the wavelength conversion unit is equivalent to 33% of the length of the light-transmitting cover has the highest attraction performance.

[0023] Furthermore, as shown in Figure 7(C), it was found that the lighting device according to Example 8 could only attract houseflies and phorid flies at a similar level of performance to the lighting device according to Comparative Example 1. From this, it was found that sufficient attraction performance cannot be obtained unless the intensity of the light in the wavelength band of 460 nm to 530 nm emitted from the wavelength conversion unit is sufficiently high.

[0024] Furthermore, the performance of the lighting device according to Example 9 of this embodiment will be described in comparison with the performance of the lighting devices according to Comparative Examples 4 and 5. The lighting device according to Example 9 has the same configuration as the lighting device according to Example 1 described in Example 1. The lighting device according to Comparative Example 4 has the same configuration as the lighting device according to Comparative Example 1 described in Example 1. The lighting device according to Comparative Example 5 includes a light source module having a light-transmitting cover in which phosphorescent material is dispersed. Here, the light-transmitting cover of the light source module according to Comparative Example 5 has a structure in which a fluorescent material or phosphorescent material that emits light (second light) with maximum relative intensity in the wavelength band of 460 nm to 580 nm when excited by ultraviolet light emitted from the light-emitting part is dispersed throughout. In addition, the content of the phosphorescent material in the light-transmitting cover is set within the range of 1% or more and 5% or less. That is, the content of the fluorescent material or phosphorescent material contained in the light-transmitting cover is less than the content of the fluorescent material or phosphorescent material contained in the wavelength conversion part 111 described above. The wavelength spectra of the light emitted from the lighting devices of Example 9 and Comparative Examples 4 and 5 each show a shape with a relative intensity peak in the wavelength band around 490 nm, as shown in Figure 8. Here, the relative intensity of the light emitted from the lighting device of Comparative Example 5 in the wavelength band around 490 nm is lower than that of Example 9. Furthermore, the position of the wavelength conversion section of the lighting devices of Example 9 and Comparative Examples 4 and 5, and the total number of photons emitted from the lighting devices during operation are shown in Table 2 below. Here, "entire" in "wavelength conversion section position" indicates that the entire light-transmitting cover functions as the wavelength conversion section. Note that the power consumption of the lighting devices of Comparative Examples 4 and 5 and Example 9 was set to be the same.

[0025] [Table 2]

[0026] Here, we will explain the results of an experiment comparing the insect attraction performance of the lighting devices according to Comparative Example 5 and Example 9. In this experiment, as mentioned above, the number of houseflies or phorid flies attracted to each of the two lighting devices was measured when the lighting devices according to Comparative Example 5 and Example 9 were installed in an environment where many houseflies or phorid flies were present. The experiment was conducted four times, 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 9(A), it was found that the lighting device according to Example 9 had higher attraction performance for both houseflies and phorid flies compared to the lighting device according to Comparative Example 5. From this result, it can be seen that a light-transmitting cover 11 having both a wavelength conversion section 111 and a transparent section 112 has high attraction performance. In addition, the lighting device according to Comparative Example 5 obtained attraction performance equivalent to that of the lighting device according to Example 9, despite having the lowest total photon quantum number.

[0027] Furthermore, the performance of the lighting device of Comparative Example 6, which has a similar configuration to the lighting device of Comparative Example 5 described above, will be explained in comparison with the performance of the lighting device of Comparative Example 7. The lighting device of Comparative Example 7 has a structure in which multiple straight-tube type insect-attracting lamps that emit ultraviolet light are arranged in parallel in the short direction. The power consumption of the lighting devices of Comparative Examples 6 and 7 was set to be the same.

[0028] Here, we will explain the results of an experiment comparing the insect attraction performance of the lighting devices according to Comparative Examples 6 and 7. In this experiment, the number of insects attracted to each of the two lighting devices according to Comparative Examples 6 and 7 was measured when they were installed near the Uji River Bridge. The experiment was conducted six times, and the average number of insects measured was calculated. Furthermore, in each experiment, the number of insects captured after leaving each lighting device unattended for 5 minutes was measured. As shown in Figure 9(B), it was found that the lighting device according to Comparative Example 6 had a higher attraction performance than the lighting device according to Comparative Example 7, especially for midges. From this result, it can be seen that even if the light-transmitting cover has a structure in which a fluorescent or phosphorescent material that emits light with maximum relative intensity in the wavelength band of 460 nm to 580 nm when excited by ultraviolet light emitted from the light-emitting part is dispersed throughout, it will have a higher attraction performance than a fluorescent lamp. In addition, the lighting device according to Comparative Example 6 had the same attraction performance as the lighting device according to Comparative Example 7 for caddisflies and mayflies. Furthermore, the same effect can be obtained even if the lighting device according to Comparative Example 6 has a shape that is curved in an annular shape. Moreover, with the lighting device according to Comparative Example 6, the light distribution area of ​​the light emitted from the lighting device can be controlled by adjusting the length or width of the elongated area in which the fluorescent or phosphorescent material is dispersed.

[0029] As described above, in the lighting device 100 according to this embodiment, the lighting body 103 supports the light source module 1 in a position where the longitudinal direction of the light-transmitting cover 11 is perpendicular to the vertical direction. Furthermore, a wavelength conversion unit 111 containing a fluorescent or phosphorescent material that emits light with maximum relative intensity in the wavelength band of 460 nm to 530 nm when excited by ultraviolet light emitted from the light-emitting unit 22 is located in the center of the longitudinal direction of the light-transmitting cover 11, and transparent parts 112 that transmit the ultraviolet light emitted from the light-emitting unit 22 are located on both sides of the wavelength conversion unit 111 in the longitudinal direction of the light-transmitting cover 11. As a result, the insect attraction effect can be enhanced compared to lighting devices that emit ultraviolet light.

[0030] Furthermore, according to the lighting device 100 of this embodiment, a portion of the ultraviolet light emitted from the light-emitting unit 22 excites the wavelength conversion unit 111, causing it to emit light in the visible light wavelength range. This has the advantage of eliminating the need for a light-emitting unit that emits light in the visible light wavelength range.

[0031] (Embodiment 2) The lighting device according to this embodiment differs from the lighting device 100 according to Embodiment 1 in the arrangement of the wavelength conversion unit and the transparent unit in the light transmission window.

[0032] As shown in Figures 10 and 11, the lighting device 2100 according to this embodiment comprises a light source module 2001 and a lighting body 103 that supports the light source module 1, and is installed on the ground F. In Figures 10 and 11, the same reference numerals are used for components that are the same as in Embodiment 1.

[0033] As shown in Figures 12(A) and (B), the light source module 2001 comprises a flexible, elongated circuit board 21, a plurality of light-emitting units 22, a current-limiting element 23 for limiting the current supplied to the light-emitting units 22, a flexible light-transmitting cover 2011 that functions as a light-transmitting window for the light source module 1, and a cap 12. In Figures 12(A) and (B), components similar to those in Embodiment 1 are denoted by the same reference numerals as in Figures 2(A) and (B).

[0034] The light-transmitting cover 2011 is a long cylindrical shape formed from a flexible material, and as shown in Figure 13, the circuit board 21 and a plurality of light-emitting parts 22 are arranged on the inside 11e. As shown in Figures 12(A), (B) and 13, the light-transmitting cover 2011 has a wavelength conversion part 2111 and a transparent part 2112. The wavelength conversion part 2111, like the wavelength conversion part 111 described in Embodiment 1, is light-transmitting and contains a fluorescent or phosphorescent material that emits light (second light) with maximum relative intensity in the wavelength band of 460 nm to 580 nm when excited by ultraviolet light emitted from the light-emitting parts 22. The transparent part 2112, like the transparent part 112 described in Embodiment 1, is transparent to ultraviolet light in the wavelength band of 340 nm to 400 nm and transmits the ultraviolet light emitted from the light-emitting parts 22 as is. Furthermore, the wavelength conversion section 2111 is located on one side of the center of the light-transmitting cover 2011 in the short direction, i.e., on the -p direction side. This wavelength conversion section 2111 is provided over the entire length of the light-transmitting cover 2011. The transparent section 2112 is located on the other side of the light-transmitting cover 2011 in the short direction, opposite to the side where the wavelength conversion section 2111 is located, i.e., on the +p direction side. This transparent section 2112 is also provided over the entire length of the light-transmitting cover 2011.

[0035] In the lighting device 2100 according to this embodiment, the lighting body 103 supports the light source module 2001 in a position where the longitudinal direction of the light-transmitting cover 2011 of the light source module 2001 is perpendicular to the vertical direction and the wavelength conversion unit 2111 is located vertically below the transparent unit 2112, i.e., in the -Z direction, as shown in Figure 10. Alternatively, the lighting body 103 supports the light source module 2001 in a position where the longitudinal direction of the light-transmitting cover 2011 of the light source module 2001 is perpendicular to the vertical direction and the wavelength conversion unit 2111 is located vertically above the transparent unit 2112, i.e., in the +Z direction, as shown in Figure 11.

[0036] Next, the performance of the lighting devices according to Examples 4 to 7 of this embodiment will be described in comparison with the performance of the lighting device according to Comparative Example 1. The lighting device according to Comparative Example 1 has the same configuration as described in Embodiment 1, except for the light source module. In the lighting device according to Example 4, as shown in Figure 11, the wavelength conversion section 2111 of the light-transmitting cover 2011 supports the light source module 2001 in a position where it is located vertically above the transparent section 2112, i.e., in the +Z direction. The wavelength spectrum of the light emitted from the lighting device according to Example 4 shows a shape with a relative intensity peak in the wavelength band around 490 nm, as shown in Figure 14. In the lighting device according to Example 5, as shown in Figure 10, the wavelength conversion section 2111 of the light-transmitting cover 2011 supports the light source module 2001 in a position where it is located vertically below the transparent section 2112, i.e., in the -Z direction. The wavelength spectrum of the light emitted from the lighting device according to Example 5 shows a shape with a relative intensity peak in the wavelength band around 490 nm, as shown in Figure 14. As shown in Figure 11, the lighting device according to Example 6 supports the light source module 2001 with the wavelength conversion section 2111 of the light-transmitting cover 2011 positioned vertically above the transparent section 2112, i.e., in the +Z direction. The wavelength spectrum of the light emitted from the lighting device according to Example 6 shows a shape with a relative intensity peak in the wavelength band around 520 nm, as shown in Figure 14. As shown in Figure 10, the lighting device according to Example 7 supports the light source module 2001 with the wavelength conversion section 2111 of the light-transmitting cover 2011 positioned vertically below the transparent section 2112, i.e., in the -Z direction. The wavelength spectrum of the light emitted from the lighting device according to Example 7 shows a shape with a relative intensity peak in the wavelength band around 520 nm, as shown in Figure 14. The position of the wavelength conversion section of the lighting devices according to Comparative Example 1 and Examples 4 to 7, and the total number of photons emitted from the lighting device during operation are shown in Table 3 below. Here, "vertically above" in the "wavelength conversion unit position" indicates that the wavelength conversion unit is located vertically above the transparent unit, as shown in Figure 11. Conversely, "vertically below" in the "wavelength conversion unit position" indicates that the wavelength conversion unit is located vertically below the transparent unit, as shown in Figure 10.

[0037] [Table 3]

[0038] Here, we will explain the results of an experiment comparing the insect attraction performance of each lighting device according to Comparative Example 1 and Examples 4 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 1 to 3 and Examples 1 to 3 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 15(A), it was found that the lighting device according to Example 4 had lower attraction performance for houseflies than the lighting device according to Comparative Example 1, but higher attraction performance for phorid flies than the lighting device according to Comparative Example 1. As shown in Figure 15(B), it was found that the lighting device according to Example 5 had lower attraction performance for both houseflies and phorid flies compared to the lighting device according to Comparative Example 1. As shown in Figure 16(A), the lighting device according to Example 6 had lower attraction performance for phorid flies than the lighting device according to Comparative Example 1, but it was found to have higher attraction performance for houseflies than the lighting device according to Comparative Example 1. As shown in Figure 16(B), 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 1. From these results, it can be seen that combining the lighting devices according to Examples 4 and 6 results in higher attraction performance for both houseflies and phorid flies compared to the lighting device according to Comparative Example 1.

[0039] As described above, according to the lighting device 2100 of this embodiment, the wavelength conversion unit 2111 is located on one side of the central part in the short direction of the light-transmitting cover 2011, i.e., on the -p direction side, and the transparent part 2112 is located on the other side opposite to the side in the short direction of the light-transmitting cover 2011 where the wavelength conversion unit 2111 is located, i.e., on the +p direction side. The lighting body 103 supports the light source module 2001 in an orientation in which the longitudinal direction of the light-transmitting cover 2011 is perpendicular to the vertical direction, and the wavelength conversion unit 2111 is located vertically below the transparent part 2112, i.e., on the -Z direction side, or in an orientation in which the wavelength conversion unit 2111 is located vertically above the transparent part 2112, i.e., on the +Z direction side. This makes it possible to enhance the insect attraction effect.

[0040] 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 light source module 1, 2001 may have one light-emitting unit 22 and a diffusion member (not shown) that diffuses the light emitted from the light-emitting unit 22 in the longitudinal direction of the light-transmitting cover 11, 2011.

[0041] In this embodiment, an example was described in which the transparent portion 112 is located adjacent to the wavelength conversion portion 111 at two locations on each side of the wavelength conversion portion 111. However, the invention is not limited to this, and a portion made of an opaque material may be placed between the transparent portion 112 and the wavelength conversion portion 111. Alternatively, a gap may be formed between the transparent portion 112 and the wavelength conversion portion 111.

[0042] In each embodiment, an example was described in which the light-transmitting cover 11, 2011 is rectangular in shape, but it is not limited to this, and it may be cylindrical or have a cross-sectional shape of other shapes.

[0043] In each embodiment and the modifications described above, examples were given in which the wavelength conversion sections 111 and 2111 of the light-transmitting covers 11 and 2011 contain a phosphorescent material. However, the invention is not limited to this, and a fluorescent material may be included instead of the phosphorescent material.

[0044] In each embodiment, an example was described in which the light source modules 1, 2001 have light-transmitting covers 11, 2011. However, the light source module may also include, for example, a housing (not shown) formed from a non-transparent material in a long box shape with a slit extending along the longitudinal direction in a part of the peripheral wall, and a light-transmitting window attached to the housing so as to cover the slit.

[0045] In each embodiment, an example was described in which a long first light source is composed of the wavelength conversion sections 111, 2111 and light-emitting section 22 of the light-transmitting covers 11, 2011, and the aforementioned second light source is composed of the transparent sections 112, 2112 and light-emitting section 22. However, the light source module is not limited to this, and may have a long first light-emitting body that emits first light with maximum relative intensity in the wavelength band of 340 nm to 400 nm, and two long second light-emitting bodies that emit second light with maximum relative intensity in the wavelength band of 460 nm to 530 nm, or both first and second light. The two second light-emitting bodies may each be arranged to the sides of both ends in the longitudinal direction of the first light-emitting body, with their longitudinal directions coinciding with the longitudinal direction of the first light-emitting body. Here, the first light-emitting body may be a plurality of light-emitting sections arranged in a row, each emitting first light with maximum relative intensity in the wavelength band of 340 nm to 400 nm. Furthermore, the second light emitter may consist of multiple light-emitting sections arranged in a row, each emitting a first light whose relative intensity is maximum in the wavelength band between 460 nm and 530 nm.

[0046] In Embodiment 1, an example was described in which the lighting body 103 supports the light source module 1 in a position where the longitudinal direction of the light-transmitting cover 11 of the light source module 1 is perpendicular to the vertical direction. However, the lighting body is not limited to this, and the lighting body may support the light source module 1 in a position where the longitudinal direction of the light-transmitting cover 11 of the light source module 1 intersects with the vertical direction or in a position along the vertical direction.

[0047] In each embodiment, an example comprising one light source module 1, 2001 has been described, but the embodiment is not limited to this. For example, it may comprise at least one long UV light source module emitting a first light whose relative intensity is maximum in the wavelength band of 340 nm to 400 nm, and a plurality of long blue light source modules emitting a second light whose relative intensity is maximum in the wavelength band of 460 nm to 530 nm, or both the first and second light. For example, in Embodiment 1, the two UV light source modules may be arranged to the sides of both ends in the longitudinal direction of one blue light source module, with their respective longitudinal directions coinciding with the longitudinal direction of at least one blue light source module. Also, in Embodiment 2, either the UV light source module or the blue light source module may be arranged adjacent to the other on the vertically downward side.

[0048] 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]

[0049] This invention is suitable as a lighting device for preventing insect damage caused by insects. [Explanation of Symbols]

[0050] 12001: Light source module, 11, 11A, 2011: Light-transmitting 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, 211: Electrode, 100: Lighting device, 101: Holding part, 102: Support, 103: Lighting body, 111, 111A, 2111: Wavelength conversion part, 112, 112A, 2112: Transparent part, PL1: Power line

Claims

1. The light source module comprises two long first light sources that emit first light with maximum relative intensity in the wavelength band of 340 nm to 400 nm, and a long second light source that emits second light with maximum relative intensity in the wavelength band of 460 nm to 530 nm, or both the first and second light sources. The two first light sources are positioned on the sides of both ends in the longitudinal direction of the second light source, with their respective longitudinal directions coinciding with the longitudinal direction of the second light source. Lighting device.

2. The lighting body further comprises a lighting unit that supports the light source module in a orientation in which the longitudinal directions of the first light source and the second light source are perpendicular to the vertical direction. The lighting device according to claim 1.

3. The light source module includes at least one light-emitting unit that emits first light having the maximum relative intensity in a wavelength band of 340 nm to 400 nm, and a long light-transmitting window positioned opposite the at least one light-emitting unit in the direction of emission of the first light. The light-transmitting window contains a fluorescent or phosphorescent material that is translucent and emits a second light whose relative intensity is maximum in the wavelength band of 460 nm to 530 nm when excited by the first light emitted from the at least one light-emitting part, and also includes a wavelength conversion part located in the center of the longitudinal direction of the light-transmitting window, and transparent parts located on both sides of the wavelength conversion part in the longitudinal direction of the light-transmitting window, which are transparent to the first light and allow the first light emitted from the at least one light-emitting part to pass through as is. The second light source includes the at least one light-emitting unit and the wavelength conversion unit, The first light source includes the at least one light-emitting portion and the transparent portion, The lighting device according to claim 1 or 2.

4. The transparent portions are located one on each side of the wavelength conversion portion, adjacent to the wavelength conversion portion, and their lengths in the longitudinal direction of the light transmission window are equal. The lighting device according to claim 3.

5. The ratio of the longitudinal length of the light transmission window of the wavelength conversion unit to the length of the light transmission window is greater than 25% and less than 50%. The lighting device according to claim 3.

6. A light source module comprising: a long first light source that emits first light having maximum relative intensity in the wavelength band of 340 nm to 400 nm; and a long second light source that emits second light having maximum relative intensity in the wavelength band of 460 nm to 530 nm, or both the first and second light; The lighting system comprises a lighting body that supports the light source module in a position where the longitudinal directions of the first light source and the second light source are perpendicular to the vertical direction, Either the first light source or the second light source is positioned adjacent to the other on the vertically downward side. Lighting device.

7. The light source module includes at least one light-emitting unit that emits first light having the maximum relative intensity in a wavelength band of 340 nm to 400 nm, and a long light-transmitting window positioned opposite the at least one light-emitting unit in the direction of emission of the first light. The light-transmitting window contains a fluorescent or phosphorescent material that is translucent and emits a second light whose relative intensity is maximum in the wavelength band of 460 nm to 580 nm when excited by the first light emitted from the at least one light-emitting part, and also includes a wavelength conversion part located either vertically above or vertically below the center of the short-side of the light-transmitting window, and a transparent part that is transparent to the first light and transmits the first light emitted from the at least one light-emitting part as is, and is located on the other side of the short-side of the light-transmitting window opposite to the side where the light-emitting part is located. The second light source includes the at least one light-emitting unit and the wavelength conversion unit, The first light source includes the at least one light-emitting portion and the transparent portion, The lighting device according to claim 6.

8. The wavelength conversion unit is located vertically above the central part in the short-side direction of the light transmission window. The relative intensity of the second light is maximized in the wavelength band between 460 nm and less than 500 nm. The lighting device according to claim 7.

9. The wavelength conversion unit is located vertically below the central part in the short-side direction of the light transmission window. The relative intensity of the second light is maximized in the wavelength band between 500 nm and 580 nm. The lighting device according to claim 7.

Images