JP7592314B2 - Light source device, insect trap and light source system - Google Patents

Description

Patent Act Article 30, Paragraph 2 applies Meeting name: Briefing for LIXIL Corporation and Nishiyama Corporation, Date: June 22, 2021, Venue: LIXIL Corporation Komagane Office, Conference Room Meeting name: Briefing for Ben-Hur Scales Co., Ltd., Date: July 9, 2021, Venue: FKK Corporation Head Office, Conference Room

The present invention relates to a light source device, an insect trap, and a light source system.

A long insect trap has been proposed that includes a long body with a roughly U-shaped cross section, a light source that is arranged inside the body and capable of emitting attractant light to attract insects, and a cover that is detachably arranged on the opening side of the body to cover the light source and form a gap between the light source and the main body (see, for example, Patent Document 1).

JP 2018-61508 A

However, a long insect trap such as that described in Patent Document 1 is required to have a high insect attracting effect when installed, for example, in a space occupied by people. In addition, such a long insect trap is required to efficiently capture insects by emitting light that is highly effective at attracting insects evenly from the entire length of the trap. For this reason, there is a demand for a long linear light source that can be installed in a narrow and long space inside the long body of the insect trap as a light source that emits light that is highly effective at attracting insects.

The present invention has been made in consideration of the above-mentioned reasons, and aims to provide a light source device, an insect trap, and a light source system that can be installed in a narrow and long space.

In order to achieve the above object, a light source device according to the present invention comprises:
A long flexible circuit board;
a plurality of light emitting units that emit light having a maximum relative intensity in a wavelength band of 340 nm or more and 400 nm or less and are mounted in a row on the circuit board;
a long cover that is made of a soft material that is translucent and contains a fluorescent material or a phosphorescent material that is excited by light emitted from the plurality of light-emitting units to emit light whose relative intensity is maximized in a wavelength band of 460 nm or more and 640 nm or less, and that covers the circuit board and the plurality of light-emitting units;
The content of fluorescent or phosphorescent material in the cover is set so that, in the wavelength spectrum of the emitted light, the ratio of the maximum relative intensity in the wavelength band of 340 nm or more and 400 nm or less to the maximum relative intensity in the wavelength band of 460 nm or more and 640 nm or less is equal to the ratio of the maximum visibility of the insects to be attracted in the wavelength band of 340 nm or more and 400 nm or less to the maximum visibility in the wavelength band of 460 nm or more and 640 nm or less .

According to the present invention, the circuit board is long and flexible, and the cover is long and translucent, and is made of a soft material containing a fluorescent or phosphorescent material that is excited by light emitted from a plurality of light-emitting elements to emit light whose relative intensity is maximum in the wavelength band of 460 nm to 640 nm. This has the advantage that the cover can be bent to fit the shape of the installation space, and can be easily installed, for example, in a narrow and long space inside the housing of an insect trap with a long and narrow housing.

1A and 1B show an insect trap according to a first embodiment of the present invention, in which (A) is a perspective view and (B) is a cross-sectional view taken along line AA of (A). 1A and 1B show a light source device according to a first embodiment, in which FIG. 3 is a cross-sectional view taken along line BB of FIG. 2A of the light source device according to the first embodiment. 1A and 1B show the spectrum of light emitted from a light source device according to embodiment 1, where FIG. 1A shows the spectrum when the phosphorescent material content is 1%, FIG. 1B shows the spectrum when the phosphorescent material content is 3%, and FIG. 1C shows the spectrum when the phosphorescent material content is 5%. 4 is a diagram showing the spectra of light emitted from the light source devices according to the example and comparative examples 1 and 2. FIG. FIG. 11 is a configuration diagram showing a light source system according to a second embodiment of the present invention. FIG. 11 is a diagram showing an example of use of a light source system according to a second embodiment. FIG. 11 is a cross-sectional view of a light source device according to a modified example. 1A is a cross-sectional view of a light source device according to a modified example, and FIG. 1B is a cross-sectional view of a light source device according to another modified example.

(Embodiment 1)
An insect trap according to an embodiment of the present invention will be described below with reference to the accompanying drawings. The insect trap according to the present embodiment includes a light source device that emits light having a wavelength spectrum with peaks of relative intensity in a wavelength band of 340 nm to 400 nm and a wavelength band of 460 nm to 640 nm, and a box-shaped housing in which the light source device is arranged and the circumferential wall is provided with at least one hole for transmitting light from the light source device to the outside and an introduction hole for introducing insects attracted by the light emitted from the light source device into the inside. The light source device includes a long flexible circuit board, a plurality of light emitting units that emit light with a maximum relative intensity in a wavelength band of 340 nm to 400 nm and are mounted in a row on the circuit board, and a long cover that is made of a soft material that is transparent and contains a fluorescent material or a phosphorescent material that is excited by the light emitted from the plurality of light emitting units to emit light with a maximum relative intensity in a wavelength band of 460 nm to 640 nm, and covers the circuit board and the plurality of light emitting units.

As shown in FIG. 1A, the insect trap 3 according to the present embodiment includes two light source devices 1 and a rectangular box-shaped housing 31 in which the two light source devices 1 are arranged. The housing 31 has a peripheral wall provided with a plurality of light transmission holes 31a for transmitting light from the light source device 1 to the outside, and an inlet 31b for introducing insects attracted to the light emitted from the light source device 1 into the inside. In addition, as shown in FIG. 1B, a return plate 32 is provided on the inside of the housing 31 to prevent insects attracted to the inside of the housing 31 from escaping again to the outside of the housing 31. In addition, the return plate 32 has a plurality of light transmission holes 32a for transmitting light emitted from the light source device 1. Here, the light transmission holes 31a drilled in the peripheral wall of the housing 31 and the light transmission holes 32a drilled in the return plate 32 are set to a size such that insects lured inside the housing 31 cannot pass through, for example, and the maximum width of the light transmission holes 31a, 32a is set to 2 mm or less. Note that the light transmission holes 31a, 32a are not limited to a circular shape in a plan view, and may have a rectangular shape or other shapes in a plan view.

The light source device 1 emits a first light having a wavelength spectrum with peaks of relative intensity in a wavelength band of 340 nm to 400 nm and a wavelength band of 460 nm to 640 nm. As shown in Figs. 2(A) and (B), the light source device 1 includes a flexible and long 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, and a flexible and long cover 11. The light source device 1 also includes caps 12 that are attached to both ends of the cover 11 in the longitudinal direction and seal the inside of the cover 11. The light source device 1 receives current from a power supply device (not shown) that outputs DC power to the light-emitting units 22 via a power line PL1.

The circuit board 21 is made of, for example, an FPC (Flexible Printed Circuits), and has a conductor pattern (not shown) formed thereon. In addition, electrodes 211 that are electrically connected to the power line PL1 are provided at both ends of the circuit board 21 in the longitudinal direction.

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 has a rectangular plate-shaped main body 22b with a circular recess 22c formed on one side in the thickness direction, a light emitting element 22a arranged at the bottom of the recess 22c, and a transparent member (not shown) that is transparent to the ultraviolet wavelength band described later and filled in the recess 22c. As the light emitting element 22a, an LED element that emits light in the ultraviolet or blue wavelength band of 340 nm to 400 nm is used. The multiple light emitting units 22 are mounted in a row at equal intervals on the first main surface 21b of the circuit board 21. The light emitting elements 22a of the light emitting unit 22 are connected to each other in series or in parallel via a conductor pattern 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 a current flows from the power supply device 10 through the power line PL1 and the conductive pattern to the light-emitting element 22a, the light-emitting element 22a lights up.

The cover 11 is a long cylinder, and as shown in FIG. 3, has a flat light-emitting surface 11a that emits light from the multiple light-emitting units 22 mounted on the circuit board 21, and a flat back surface 11b that faces the light-emitting surface 11a, and covers the circuit board 21 and the multiple light-emitting units 22. The circuit board 21 and the multiple light-emitting units 22 are arranged on the inside 11e of the cover 11. 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 the first main surface 21b is in close contact with the cover 11. In addition, the cover 11 has a tapered surface 11d formed along its longitudinal direction at the corners of its outer wall. The light-emitting surface 11a of the cover 11 is parallel to the first main surface 21b of the circuit board 21, and is formed along the longitudinal direction of the cover 11 on the outer wall of the cover 11 facing the first main surface 21b. The light emitting surface 11a has a groove 11c extending along the longitudinal direction of the cover 11. This groove 11c is a decorative groove. The tapered surface 11d is inclined with respect to the first main surface 21b on which the multiple light emitting units 22 of the circuit board 21 are mounted.

The cover 11 is formed of a flexible material that is translucent and contains a phosphorescent material that is excited by the ultraviolet wavelength band light emitted from the multiple light-emitting units 22 to emit light with a maximum relative intensity in a wavelength band of 460 nm to 640 nm. As the flexible material, a thermosetting polyurethane resin, silicone resin, or the like having translucency can be used. The content of the phosphorescent material in the cover 11 is set to a range of 0.1% to 20%. As the phosphorescent material, for example, a phosphorescent material containing strontium aluminate as a main component is used. The light emitted from the light source device 1 is a mixture of a part of the light emitted from the multiple light-emitting units 22 and the light emitted from the phosphorescent material contained in the cover 11, and has a so-called bimodal characteristic in which a wavelength spectrum has peaks of relative intensity in the wavelength band of 340 nm to 400 nm and the wavelength band of 460 nm to 640 nm.

The amount of phosphorescent material contained is preferably set according to, for example, the visibility of the insects to be attracted. The visibility of most insects has a wavelength spectrum roughly represented by the curve S11 in FIG. 4(A). On the other hand, when the amount of phosphorescent material contained is 1%, the wavelength spectrum of the light emitted from the light source device 1 becomes the wavelength spectrum represented by the curve S12 in FIG. 4(A), and has characteristics approximately similar to the wavelength spectrum of the visibility of insects represented by the curve S11. For this reason, when the aim is to attract as many types of insects as possible to the light source device 1, it is preferable to set the amount of phosphorescent material to 1%.

The visibility of the western flower thrips, which are often found in Chiba and Saitama prefectures and cause great damage to vegetables and fresh flowers, has a wavelength spectrum roughly represented by the curve S21 in FIG. 4(B). On the other hand, when the content of the phosphorescent material is 3%, the wavelength spectrum of the light emitted from the light source device 1 becomes the wavelength spectrum represented by the curve S22 in FIG. 4(B), and has characteristics similar to those of the wavelength spectrum of the visibility of the western flower thrips represented by the curve S21. For this reason, when the light source device 1 is intended to attract the western flower thrips in Chiba and Saitama prefectures and reduce damage to vegetables and fresh flowers, it is preferable to set the content of the phosphorescent material to 3%. Furthermore, the visibility of the brown planthopper, which is a pest of rice, has a wavelength spectrum roughly represented by the curve S31 in FIG. 4(C). On the other hand, when the content of the phosphorescent material is 5%, the wavelength spectrum of the light emitted from the light source device 1 becomes the wavelength spectrum represented by the curve S32 in FIG. 4(C), and has characteristics similar to the wavelength spectrum of the visibility of the brown planthopper represented by the curve S31. Therefore, when the purpose of using the light source device 1 to attract the brown planthopper in a rice-growing area and reduce the damage caused by pests to rice, it is preferable to set the content of the phosphorescent material to 5%. The wavelength spectrum of the visibility of insects represented by the curves S11, S21, and S31 in FIG. 4(A) to (C) is quoted from the description on pages 5 to 10 of "Guide to Pest Control Using Light" (published by the National Agriculture and Food Research Organization, National Agricultural Research Center, July 2014).

In this way, in the light source device 1 according to the present embodiment, by changing the content of the phosphorescent material in the cover 11, it is possible to change the ratio of the intensity of the wavelength band of 340 nm or more and 400 nm or less in the light emitted from the light source device 1 to the intensity of the wavelength band of 460 nm or more and 640 nm or less. It is also possible to set the content of the phosphorescent material in the cover 11 so that the shape of the wavelength spectrum of the light emitted from the light source device 1 matches the shape of the wavelength spectrum of the visibility of the target insect.

Returning to Figures 2(A) and (B), the cap 12 is formed from a translucent resin material and has a bottomed rectangular tubular shape. The bottom wall of the cap 12 is provided with an introduction hole 12a for introducing the power line PL1. The inner cross-sectional dimensions of the cap 12 are larger than the outer cross-sectional dimensions of the cover 11, and the cap 12 is attached so as to cover both longitudinal ends of the cover 11.

Here, the results of comparing the amount of insects caught by each of the traps according to the embodiment of the present invention and two comparative examples will be described. As the light source device used in the trap according to the comparative example 1, one that emits light having a wavelength spectrum with a peak only in the wavelength region of ultraviolet light with a peak wavelength of 367 nm was adopted. Also, as the light source device used in the trap according to the comparative example 2, a light source device equipped with a light emitting unit that emits light having a wavelength spectrum with a peak only in the wavelength region of green light with a wavelength of 520 nm was adopted, along with a light emitting unit 22 that emits light having a wavelength spectrum with a peak only in the wavelength region of ultraviolet light with a wavelength of 367 nm was adopted. On the other hand, as the light source device used in the trap according to the embodiment of the present invention, one that has a configuration similar to the light source device 1 described above and emits light having a wavelength spectrum with a peak of relative intensity in each of the wavelength region of ultraviolet light with a wavelength of 367 nm and the wavelength of 519 nm was adopted. Here, the cover 11 of the light source device according to the embodiment contains a phosphorescent material that emits light having a wavelength spectrum with a maximum relative intensity at a wavelength of 519 nm when excited by ultraviolet light. The wavelength spectrum of the light emitted from the light source device according to the embodiment and comparative examples 1 and 2 is shown in FIG. 5. In FIG. 5, curves S41 and S42 show the wavelength spectrum of the light emitted from the light source device according to comparative examples 1 and 2, respectively, and curve S43 shows the wavelength spectrum of the light emitted from the light source device according to the embodiment. As shown in FIG. 5, the light emitted from the light source device according to the embodiment has a feature that the full width at half maximum of the relative intensity peak in the vicinity of a wavelength of 519 nm of the wavelength spectrum of the light emitted from the light source device according to the comparative example is longer than the full width at half maximum of the relative intensity peak in the vicinity of a wavelength of 520 nm of the wavelength spectrum of the light emitted from the light source device according to the comparative example 2. Specifically, the full width at half maximum of the relative intensity peak in the vicinity of a wavelength of 520 nm of the wavelength spectrum of the light emitted from the light source device according to the comparative example 2 is about 40 nm, while the full width at half maximum of the relative intensity peak in the vicinity of a wavelength of 519 nm of the wavelength spectrum of the light emitted from the light source device according to the embodiment is 90 nm or more.

The insect traps according to the embodiment and comparative examples 1 and 2 were installed near the riverbed of the Katsura River in Kyoto City, and the amount of insects captured when each trap was left with the light source device turned on between June 11, 2021 and June 27, 2021 is shown in Table 1 below.

As shown in Table 1, it was found that the amount of insects caught by the insect trap of the embodiment was greater than the amount of insects caught by the insect traps of the comparative examples 1 and 2. From this, it was found that a higher insect catching effect can be obtained by using a light source device that has a wavelength spectrum with relative intensity peaks not only in the ultraviolet wavelength band but also in the wavelength band of 460 nm to 640 nm, and emits light with a full width at half maximum of 90 nm or more of the relative intensity peak in the wavelength band of 460 nm to 640 nm, as in the insect trap of the embodiment.

As described above, according to the light source device 1 of this embodiment, the circuit board 21 is long and flexible, and the cover 11 is long and translucent, and is made of a soft material containing a phosphorescent substance that is excited by light emitted from the multiple light-emitting elements 22 to emit light whose relative intensity is maximized in the wavelength band of 460 nm to 640 nm. In other words, the light source device 1 is a flexible linear light source that emits light that has an insect-attracting effect. This allows it to be bent to fit the shape of the installation space, which has the advantage that it can be easily installed in a narrow and long space inside the housing 31 of the insect trap 3.

The content of the phosphorescent material in the cover 11 according to this embodiment is set to 0.1% or more and 20% or less. This allows the light source device 1 to emit light in the wavelength range of 460 nm or more and 640 nm or less, where the visibility peak of insects is located, thereby enhancing the insect attraction effect.

Furthermore, the insect trap 3 according to this embodiment is equipped with the aforementioned elongated light source device 1, so that the entire housing 31 can be made elongated, allowing it to be installed in a narrow and long space.

(Embodiment 2)
The light source system according to the present embodiment includes a first light source device that emits a first light having a wavelength spectrum with a peak of relative intensity in each of a wavelength band of 340 nm to 400 nm and a wavelength band of 460 nm to 640 nm, and a second light source device that emits a second light having a wavelength spectrum with a peak of relative intensity in a wavelength band of 580 nm or more. The first light source device includes a long, flexible circuit board, a plurality of light-emitting units that emit light with a maximum relative intensity in the wavelength band of 340 nm to 400 nm and are mounted in a row on the circuit board, and a long cover that is made of a soft material that is translucent and contains a fluorescent material or a phosphorescent material that is excited by the light emitted from the plurality of light-emitting units to emit light with a maximum relative intensity in the wavelength band of 460 nm to 640 nm, and that covers the circuit board and the plurality of light-emitting units.

As shown in FIG. 6, the light source system according to this embodiment includes two light source devices 1 and 9, and a power supply device 10 that supplies power to the light source devices 1 and 9 via power lines PL1 and PL2. In FIG. 6, the same components as those in the first embodiment are given the same reference numerals as those in FIGS. 1(A) and (B). The power supply device 10 includes a rectifying and smoothing circuit that rectifies and smoothes AC supplied from a commercial power source to convert it into DC, and a power conversion circuit that boosts or lowers the DC output from the rectifying and smoothing circuit to the rated voltage of the light source devices 1 and 9 and outputs it.

The light source device 9 emits light having a wavelength spectrum with a peak of relative intensity in a wavelength band of 580 nm or more, for example. The light source device 9 has a configuration similar to that of the light source device 1, and includes a flexible long circuit board 21, a plurality of light-emitting units, a current limiting element 23 for limiting the current supplied to the light-emitting units, a flexible long cover, and a cap 12. The same configuration of the light source device 9 as that of the light source device 1 will be described using the same reference numerals as those in FIG. 2 (A) and (B) of the first embodiment. The light-emitting unit has a main body 22b in which the aforementioned recess 22c is formed, and a light-emitting element 22a arranged at the bottom of the recess 22c, and the recess 22c is filled with a color conversion material that converts light in the ultraviolet or blue wavelength band to the wavelength band of visible light. Here, the color conversion material includes a fluorescent material that emits light having a wavelength spectrum with a peak of relative intensity in a wavelength band of 580 nm or more, for example. The cover is formed of a soft material that is transparent to visible light, for example. As with the cover 11 described in the embodiment, the soft material may be a transparent thermosetting polyurethane resin, silicone resin, or the like. The wavelength spectrum of the light emitted from the light source device 9 has a peak on the longer wavelength side than the wavelength band in which the peak of visibility of insects described above exists.

The light source system according to this embodiment is used with both light source devices 1 and 9 turned on, as shown in FIG. 7, for example. Here, light source device 9 is installed so as to illuminate area A2 where user P lives, and light source device 1 is installed at a position separated from area A2. Insect I is attracted to area A1 near light source device 1 by the light emitted from light source device 1, and as a result, insect I can be prevented from flying into area A2.

As described above, in the light source system according to this embodiment, even if the installation space for the light source device 1 is curved, narrow, and long, it can be bent to fit the shape of the installation space, which has the advantage that insects can be attracted to the light source device 1 even when it is installed in an inconspicuous, narrow, and long space.

Although each embodiment of the present invention has been described above, the present invention is not limited to the configuration of each of the above-mentioned embodiments. For example, as in the light source device 2001 shown in FIG. 8, the thickness H21 of the portion of the cover 2011 on the radiation direction side of the light from the light emitting unit 22, i.e., the +Z direction side, may be set to be longer than the height H20 from the light emitting element 22a of the light emitting unit 22 to the inner wall facing the light emitting unit 22 on the inside 2011e of the cover 2011. According to this configuration, it is possible to increase the conversion efficiency of the cover 2011 of the light emitted from the light emitting unit 22 while reducing the content of the phosphorescent material contained in the cover 2011. Therefore, the strength of the cover 2011 can be increased by the amount that the content of the phosphorescent material in the cover 2011 can be reduced.

In the embodiment, an example in which the entire cover 11 is formed from a soft material containing a phosphorescent material has been described. However, this is not limited to this, and for example, as in the light source device 3001 shown in FIG. 9(A), the cover 3011 may be a long cylindrical shape, and may have a transparent portion 3112 that extends from the inner wall of the cover 3011 to the outer wall of the cover 3011 on the radiation direction side of light from the multiple light-emitting units 22 in the cover 3011, i.e., the +Z direction side, and a light-emitting portion 3111. In FIG. 9(A), the same configuration as in embodiment 1 is given the same reference numerals as in FIG. 3. Here, the transparent portion 3112 is a portion that is transparent to light in the wavelength band of 340 nm to 400 nm, and is a portion that does not contain a phosphorescent material, a fluorescent material, or the like. In addition, the light-emitting portion 3111 is disposed in a portion of the cover 3011 other than the transparent portion 3112, and is a portion that contains a phosphorescent material. In this case, the cover 3011 is formed by a so-called two-color molding method. In addition, the area of the cross section of the transparent portion 3112 perpendicular to the thickness direction of the circuit board 21 gradually increases from the inner wall of the cover 3011 toward the outer wall of the cover 3011, i.e., toward the +Z direction. This allows the light emitted from the light-emitting portion 22 to be efficiently emitted to the outside of the cover 3011.

Alternatively, as in the light source device 4001 shown in FIG. 9B, for example, the cover 4011 may have a transparent portion 4112 extending from the inner wall of the cover 4011 to the outer wall of the cover 4011 on the radiation direction side of the light from the multiple light-emitting units 22 in the cover 4011, i.e., the +Z direction side, the light-emitting unit 4111, and a transparent portion 4113 extending from the inner wall of the cover 4011 to the outer wall of the cover 4011 on the -Z direction side of the cover 4011. Note that in FIG. 9B, the same components as those in the modified example described using FIG. 7 are given the same reference numerals as in FIG. 8. Here, if the circuit board 21 is transparent, the light emitted from the light-emitting units 22 passes through the transparent portion 4113 and is taken out to the outside of the cover 4011.

This configuration can increase the extraction efficiency of the light emitted from the multiple light-emitting elements 22, thereby increasing the attraction effect to insects that have high visibility to light in the wavelength band of 340 nm or more and 400 nm or less.

In the light source device 1 according to the embodiment, a sealing resin part may be provided instead of the cap 12. Here, the sealing resin part may seal both ends of the cover 11 in a state in which the circuit board 21 and the multiple light emitting parts 22 are arranged inside the cover 11 and the power line PL1 is connected from one end of the cover 11 in the cylindrical axis direction to an electrode 211 provided on the circuit board 21. According to this configuration, particularly when the light source device 1 is used outdoors, the intrusion of water and other foreign matter from both ends sealed by the sealing resin part in the cover 11 into the inside of the cover is suppressed, so that malfunction of the light source device 1 caused by the adhesion of foreign matter to the circuit board 21 arranged inside the cover 11 is suppressed.

In the embodiment, an example in which the cover 11 is a rectangular tube has been described, but this is not limiting, and the cover may be cylindrical or have a tubular cross-sectional shape of another shape.

In the embodiment and the above-mentioned modified example, the cover 11, 2011 contains a phosphorescent material, or the light-emitting portion 3111, 4111 of the cover 3011, 4011 contains a phosphorescent material. However, this is not limited to this, and the cover may contain a fluorescent material instead of a phosphorescent material.

Although the embodiments and modifications of the present invention have been described above, the present invention is not limited to these. The present invention includes suitable combinations of the embodiments and modifications, and suitable modifications thereto.

The light source device of the present invention is suitable for use as a light source system for preventing pests caused by insects.

1, 9, 2001, 3001, 4001: Light source device, 3: Insect trap, 10: Power supply device, 11, 2011, 3011, 4011: Cover, 11a: Light emission surface, 11b: Back surface, 11c: Groove, 11d: Tapered surface, 11e, 2011e: Inner surface, 11f: Outer surface, 12: Cap, 12a: Introduction hole, 21: Circuit board, 21a: Both ends, 21b: First main surface, 2 1c: second main surface, 22: light emitting section, 22a: light emitting element, 22b: main body, 22c: recess, 23: current limiting element, 31: housing, 31a, 32a: light transmission hole, 31b: inlet, 32: return plate, 211: electrode, 3111, 4111: light emitting section, 3112, 4112, 4113: transparent section, A1, A2: area, I: insect, P: user, PL1, PL2: power line

Claims (7)

A long flexible circuit board;
a plurality of light emitting units that emit light having a maximum relative intensity in a wavelength band of 340 nm or more and 400 nm or less and are mounted in a row on the circuit board;
a long cover that is made of a soft material that is translucent and contains a fluorescent material or a phosphorescent material that is excited by light emitted from the plurality of light-emitting units to emit light whose relative intensity is maximized in a wavelength band of 460 nm or more and 640 nm or less, and that covers the circuit board and the plurality of light-emitting units;
The content of the fluorescent material or phosphorescent material in the cover is set so that the ratio of the maximum relative intensity in the wavelength band of 340 nm or more and 400 nm or less to the maximum relative intensity in the wavelength band of 460 nm or more and 640 nm or less in the wavelength spectrum of the emitted light is equal to the ratio of the maximum visibility of the insects to be attracted in the wavelength band of 340 nm or more and 400 nm or less to the maximum visibility of the insects to be attracted in the wavelength band of 460 nm or more and 640 nm or less.
Light source device. The insects to be attracted include at least the orange flower thrips and the brown planthopper.
The light source device according to claim 1 . The content of the fluorescent material or phosphorescent material in the cover is 0.1% or more and 20% or less.
3. The light source device according to claim 1. The cover is a long cylinder, and has a transparent portion that is transparent to light in a wavelength band of 340 nm or more and 400 nm or less from an inner wall of the cover to an outer wall of the cover on the radiation direction side of the light from the plurality of light-emitting units in the cover, and a light-emitting portion that is arranged in a portion of the cover other than the transparent portion and contains the fluorescent material or the phosphorescent material.
The light source device according to claim 1 . the transparent portion has a cross-sectional area perpendicular to a thickness direction of the circuit board, the cross-sectional area gradually increasing from the inner wall of the cover toward the outer wall of the cover;
The light source device according to claim 4 . a light source device that emits light having a wavelength spectrum with relative intensity peaks in a wavelength band of 340 nm to 400 nm and a wavelength band of 460 nm to 640 nm, respectively;
a box-shaped housing in which the light source device is disposed, and having at least one light transmission hole in a peripheral wall for transmitting light from the light source device to the outside, and an introduction port for introducing insects attracted by the light emitted from the light source device into the housing;
The light source device includes:
A long flexible circuit board;
a plurality of light emitting units that emit light having a maximum relative intensity in a wavelength band of 340 nm or more and 400 nm or less and are mounted in a row on the circuit board;
a long cover that is made of a soft material that is transparent and contains a fluorescent material or a phosphorescent material that is excited by light emitted from the plurality of light-emitting units to emit light whose relative intensity is maximized in a wavelength band of 460 nm or more and 640 nm or less, and that covers the circuit board and the plurality of light-emitting units;
The content of the fluorescent material or phosphorescent material in the cover is set so that the ratio of the maximum relative intensity in the wavelength band of 340 nm or more and 400 nm or less to the maximum relative intensity in the wavelength band of 460 nm or more and 640 nm or less in the wavelength spectrum of the emitted light is equal to the ratio of the maximum visibility of the insects to be attracted in the wavelength band of 340 nm or more and 400 nm or less to the maximum visibility of the insects to be attracted in the wavelength band of 460 nm or more and 640 nm or less.
Insect trap. a first light source device that emits a first light having a wavelength spectrum with a relative intensity peak in a wavelength band of 340 nm or more and 400 nm or less and a wavelength band of 460 nm or more and 640 nm or less;
a second light source device that emits second light having a wavelength spectrum with a relative intensity peak in a wavelength band of 580 nm or more;
The first light source device is
A long flexible circuit board;
a plurality of light emitting units that emit light having a maximum relative intensity in a wavelength band of 340 nm or more and 400 nm or less and are mounted in a row on the circuit board;
a long cover that is made of a soft material that is transparent and contains a fluorescent material or a phosphorescent material that is excited by light emitted from the plurality of light-emitting units to emit light whose relative intensity is maximized in a wavelength band of 460 nm or more and 640 nm or less, and that covers the circuit board and the plurality of light-emitting units;
The content of the fluorescent material or phosphorescent material in the cover is set so that the ratio of the maximum relative intensity in the wavelength band of 340 nm or more and 400 nm or less to the maximum relative intensity in the wavelength band of 460 nm or more and 640 nm or less in the wavelength spectrum of the emitted light is equal to the ratio of the maximum visibility of the insects to be attracted in the wavelength band of 340 nm or more and 400 nm or less to the maximum visibility of the insects to be attracted in the wavelength band of 460 nm or more and 640 nm or less.
Light source system.

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