JP6998077B2 - Lighting system - Google Patents

Description

The present invention relates to a lighting system.

A light emitting element, a housing having a light emitting element mounted inside and having an opening for emitting light emitted from the light emitting element to the outside, a UV / IR cut filter provided to close the opening, and UV. A lighting device including a diffusion filter provided outside the IR cut filter has been proposed (see, for example, Patent Document 1). This lighting fixture cuts the light in the wavelength band of ultraviolet light and the light in the wavelength band of infrared light emitted from the light emitting element with a cut filter, and transmits only the light in the wavelength band of visible light to the diffusion filter side.

Japanese Unexamined Patent Publication No. 2020-047501

By the way, it has been reported that when a bacterium or a virus is irradiated with ultraviolet light, the bacterium or the virus is inactivated. Therefore, by utilizing this characteristic of ultraviolet light, a light source that emits ultraviolet light used in the ultraviolet irradiation device as described above is installed in public facilities, restaurants, etc., and the number of users is relatively small at night time. It is being proposed to inactivate bacteria, viruses, etc. existing in public facilities, restaurants, etc. by ultraviolet light emitted from a light source.

The present invention has been made in view of the above reasons, and an object of the present invention is to provide a lighting system capable of efficiently inactivating bacteria, viruses, etc. while functioning as a visible light source. do.

In order to achieve the above object, the lighting system according to the present invention is
A long circuit board having flexibility, a plurality of first light emitting units mounted on the circuit board and connected in series to radiate light in the visible light wavelength band, and mounted on the circuit board and ultraviolet. The circuit board and the plurality of first light emitting portions formed of a plurality of second light emitting portions connected in series for radiating light in the wavelength band of light and a soft material that transmits light in the wavelength band of ultraviolet light. And a long cover having flexibility to cover the plurality of second light emitting portions, the high potential side of the first series circuit composed of the plurality of first light emitting portions, and the plurality of second light emitting portions. The high potential side of the second series circuit made of the above is commonly connected to the first electrode pad arranged on the circuit board, and the low potential side of the first series circuit is arranged on the circuit board. It is electrically connected to a second electrode pad different from the one electrode pad, and the low potential side of the second series circuit is electrically connected to the first electrode pad and the third electrode pad different from the second electrode pad. The lighting equipment that has been installed,
A sensor unit having an illuminance sensor that detects the brightness of the surroundings and a motion sensor that detects the presence or absence of people around.
The first switching element inserted between the output end on the high potential side of the DC power supply and the first electrode pad, and the interposition between the output end on the low potential side of the DC power supply and the second electrode pad. It has an inserted second switching element and a third switching element inserted between the output end on the low potential side of the DC power supply and the third electrode pad, and is detected by the illuminance sensor. When the illuminance transitions from a state higher than the preset reference illuminance to a state of the reference illuminance or less, the first switching element is turned from the off state to the on state, and then when a person is detected by the human sensor. By turning the second switching element on and the third switching element off, the plurality of first light emitting units are turned on, and when a person is not detected by the human sensor, the second light emitting unit is turned on. A lighting control unit for lighting the plurality of second light emitting units by turning off the switching element and turning on the third switching element is provided.

According to the present invention, the plurality of first light emitting units emit light in the wavelength band of visible light, and the plurality of second light emitting units emit light in the wavelength band of ultraviolet light. The cover is formed of a soft material that transmits light in the wavelength band of ultraviolet light, and covers a circuit board, a plurality of first light emitting portions, and a plurality of second light emitting portions. As a result, for example, by lighting a plurality of second light emitting units at night time, bacteria, viruses, etc. are inactivated by ultraviolet light even at night time when sunlight including ultraviolet light does not exist. Can be made to. Therefore, for example, by installing it in a public facility, a food and drink point, etc., it becomes possible to efficiently inactivate bacteria, viruses, etc. in these facilities.

The lighting apparatus which concerns on Embodiment 1 of this invention is shown, (A) is a perspective view, (B) is a sectional view. It is a top view which shows a part of the light emitting module which concerns on Embodiment 1. FIG. The light emitting module according to the first embodiment is shown, (A) is a partially enlarged plan view, and (B) is a circuit diagram. It is a circuit diagram of the lighting control unit which concerns on Embodiment 1. FIG. It is operation explanatory drawing of the lighting control unit which concerns on Embodiment 1. FIG. It is a schematic block diagram of the lighting system which concerns on Embodiment 2 of this invention. It is a circuit diagram of the lighting control unit which concerns on Embodiment 2. FIG. It is operation explanatory drawing of the lighting control unit which concerns on Embodiment 2. FIG.

(Embodiment 1)
Hereinafter, the lighting device according to the embodiment of the present invention will be described with reference to the accompanying drawings. The lighting device according to the present embodiment is mounted on a long circuit board having flexibility, a plurality of first light emitting portions mounted on the circuit board and radiating light in the wavelength band of visible light, and a circuit board. It also includes a plurality of second light emitting units that emit light in the wavelength band of ultraviolet light. Further, the illuminating device is formed of a soft material that transmits light in the wavelength band of ultraviolet light, and includes a circuit board, a plurality of first light emitting portions, and a long cover covering a plurality of second light emitting portions. Then, this lighting device is installed in a public facility, a restaurant, etc., and the first light emitting unit is turned on at a time when a user of the public facility, a restaurant, etc. exists in the surroundings at night, and the user is in the surroundings. The second light emitting unit is turned on when it does not exist. This inactivates bacteria, viruses, etc. existing in public facilities, restaurants, etc. at night.

As shown in FIG. 1 (A), the lighting device 1 includes a plurality of (five in FIG. 1 (A)) flexible light emitting modules 21 and a long cover 11 that covers the light emitting modules 21. And a lighting control unit 41. Further, the lighting device 1 includes a cap 12 that is attached to both ends of the cover 11 in the longitudinal direction to seal the inside of the cover 11, an illuminance sensor 51 that detects the brightness around the lighting device 1, and the surroundings of the lighting device 1. It is equipped with a motion sensor 61 for detecting the presence or absence of a person. The cap 12 is provided with a lead-out hole 12a for leading the conductive wires L1 and L2 for supplying a current to the light emitting module 21 to the outside of the cap 12.

As shown in FIGS. 1B and 2, the light emitting module 21 includes a long rectangular plate-shaped circuit board 211, 14 first light emitting units 212, and 6 second light emitting units 213. Has. The circuit board 211 is composed of, for example, FPCs (Flexible Printed Circuits), and is formed with electrode pads 211a, 211b, 211c and a conductor pattern (not shown). The electrode pads 211c are provided on the surface opposite to the surface on which the electrode pads 211a and 211b are provided. The first light emitting unit 212 and the second light emitting unit 213 are, for example, SMD (Surface Mount Device) type LED (Light Emitting Diode) light emitting devices, respectively. As shown in FIG. 3A, the first light emitting portion 212 is arranged at the bottom of the main body portion 212b, which has a rectangular plate shape and has a circular recess 212c in a plan view formed on one side in the thickness direction, and the bottom of the recess 212c. It has a light emitting element 212a provided and a color conversion member 212d filled in the recess 212c. Further, the first light emitting unit 212 has two electrodes 212e arranged at both ends of the main body unit 212b in the X-axis direction. As the light emitting element 212a, for example, an LED element that emits light in a blue or ultraviolet wavelength band is adopted. The color conversion member 212d is formed of, for example, a translucent resin containing a yellow phosphor. The two electrodes 212e are each electrically connected to a conductor pattern formed on the circuit board 211.

Similar to the first light emitting unit 212, the second light emitting unit 213 has a main body portion 212b in which the recess 212c is formed, a light emitting element 213a arranged at the bottom of the recess 212c, and a translucency filled in the recess 212c. It has a member 213d and two electrodes 212e. As the light emitting element 213a, an LED element that emits ultraviolet light in a wavelength band of 200 nm or more and 380 nm or less is adopted. Further, as the translucent member 213d, a translucent member formed of a silicone resin transparent to light in a wavelength band of 200 nm or more and 380 nm or less is adopted.

The six second light emitting units 213 are mounted in a row along the Y-axis direction at the central portion of the circuit board 211 in the X-axis direction. Then, seven first light emitting units 212 are mounted in a row along the Y-axis direction on each of the + X direction side and the −X direction side of the six second light emitting units 213 mounted in a row. .. As shown in FIG. 3B, the 14 first light emitting units 212 are connected in 7 series and 2 parallel. Then, one current regulator 215 is interposed in a part of each of the two series circuits in which the seven first light emitting units 212 are connected in series. As the current regulator 215, for example, MSI45020AT1G manufactured by Onsemi can be adopted. Further, the six second light emitting units 213 are connected in series via four current limiting resistances 214 for limiting the current flowing through them to a preset size. The anode side of the series circuit including the seven first light emitting units 212 and the anode side of the series circuit including the six second light emitting units 213 are commonly connected to the electrode pad 211a via the conductor pattern formed on the circuit board 211. ing. On the other hand, the cathode of the series circuit including the seven first light emitting units 212 is connected to the electrode pad 211b via the conductor pattern formed on the circuit board 211. Further, the cathode side of the series circuit including the six second light emitting units 213 is connected to the electrode pad 211c via the conductor pattern formed on the circuit board 211.

As shown in FIGS. 1A and 1B, the cover 11 has a cover main body 111 formed in a long square cylinder shape and covering the five light emitting modules 21 and a Y-axis on the −Z direction side of the cover main body 111. It has two long ribs 112, which extend along the direction. That is, the cover 11 main body covers the circuit board 211, the 14 first light emitting units 212, and the 6 second light emitting units 213 of the light emitting module 21. Both the cover body 111 and the rib 112 are formed of a soft material that transmits light in the wavelength band of ultraviolet light. As such a flexible material, for example, a silicone resin that is transparent to light in the wavelength band of ultraviolet light, that is, a wavelength band of 200 nm or more and 380 nm or less is adopted.

The illuminance sensor 51 is provided on one of the two caps 12. The illuminance sensor 51 may be an analog illuminance sensor or a digital illuminance sensor. When the detected illuminance is lower than the preset reference illuminance, the illuminance sensor 51 outputs an L level voltage, and once the detected illuminance changes from a state lower than the reference illuminance to a state of being equal to or higher than the reference illuminance. It outputs a preset H level voltage higher than the L level. The motion sensor 61 is provided on one of the three caps 12. As the motion sensor 61, for example, a sensor provided with a pyroelectric sensor that detects infrared rays emitted from a person can be used. The motion sensor 61 has two output ports te1 and te2, and when detecting a person, outputs a preset H level voltage from the output port te1 and is lower than the H level from the output port te2. Outputs a preset H level voltage. On the other hand, when the human sensor 61 stops detecting a person, the human sensor 61 outputs an L level voltage from the output port te1 and outputs an H level voltage from the output port te2.

The lighting control unit 41 controls the lighting state of the first light emitting unit 212 and the second light emitting unit 213 of the light emitting module 21 based on the outputs of the illuminance sensor 51 and the motion sensor 61, respectively. Specifically, the lighting control unit 41 sets the first light emitting unit 212 when a person is detected by the motion sensor 61 in the case where the illuminance detected by the illuminance sensor 51 is equal to or less than the preset reference illuminance. The light is turned on and the second light emitting unit 213 is maintained in the off state. On the other hand, in the lighting control unit 41, when the illuminance detected by the illuminance sensor 51 is equal to or less than the preset reference illuminance and no person is detected by the motion sensor 61, the first light emitting unit 212 is turned off. It is maintained and the second light emitting unit 213 is turned on. As shown in FIG. 4, for example, the lighting control unit 41 is connected to a power supply circuit 31 that converts alternating current supplied from an alternating current power supply AC into direct current and outputs it via conductive lines L1 and L2. Here, the power supply circuit 31 has a rectifying smoothing circuit and a step-down chopper circuit, and outputs a DC voltage between the two output ends teH and teL so that the output end teH side is on the high potential side.

The lighting control unit 41 includes four switching elements SW1, SW2, SW4, SW5, three resistors R1, R2, R3, inverters IN1, IN2, a Zener diode ZD1, a comparator CMP, and a latch circuit 411, 413. And a first timer 414 and a second timer 412. The switching elements SW1, SW2 , SW4, and SW5 are, for example, NPN type bipolar transistors. In the switching element SW5, the collector is connected to the output end teH on the high potential side of the power supply circuit 31, and the emitter is connected to the electrode pad 211a of the light emitting module 21. In the switching element SW1, the collector is connected to the electrode pad 211b of the light emitting module 21, the emitter is connected to the output end teL on the low potential side of the power supply circuit 31, and the base is connected to the Q terminal of the latch circuit 413 . In the switching element SW2, the collector is connected to the electrode pad 211c of the light emitting module 21, and the emitter is connected to the output end teL on the low potential side of the power supply circuit 31. In the switching element SW4, the emitter is connected to the output end teL on the low potential side of the power supply circuit 31 via the pull-down resistor R2 and is connected to the S terminal of the latch circuit 413, and the collector is connected to the high potential side of the power supply circuit 31. It is connected to the output end teH of the above via a resistor R1 for diversion. Further, the base of the switching element SW4 is connected to the output port te1 of the motion sensor 61. The latch circuit 413 is, for example, an SR flip-flop circuit, and when the input voltage input to the S terminal transitions from the L level to the H level, the input voltage input from the first timer 414 to the R terminal changes from the L level to the H level. The voltage of H level is continuously output from the Q terminal until the transition to. The first timer 414 is connected to the output port te2 of the motion sensor 61, and when the output of the output port te2 transitions from the L level to the H level, counting is started, and then the counting number is set in advance as the first reference. When the number corresponding to the time is reached, the H level voltage is output to the R terminal of the latch circuit 413. Here, the first reference time is set to, for example, several min to several tens of min.

The inverter IN1 is, for example, an inverting amplifier circuit, and the input end is connected to the Q terminal of the latch circuit 413 and the output end is connected to the base of the switching element SW2. The comparator CMP is configured to include, for example, an operational amplifier, and when the voltage at the positive side input end is equal to or higher than the voltage at the negative side input end, a preset H level voltage is output from the output end and the positive side input end is output. When the voltage of is less than the voltage of the negative input end, the voltage of the L level lower than the H level is output from the output end. The output end of the comparator CMP is connected to the base of the switching element SW5, and the negative input end is connected to the cathode of the Zener diode ZD1. The Zener diode ZD1 functions as a constant voltage source, the cathode is connected to the output end teL on the low potential side of the power supply circuit 31, and the anode is on the high potential side of the power supply circuit 31 via the voltage dividing resistor R3. It is connected to the output terminal teH. The inverter IN2 is, for example, an inverting amplifier circuit, and the input end is connected to the output terminal (not shown) of the illuminance sensor 51, and the output end is connected to the positive side input end of the comparator CMP. Here, the comparator CMP outputs an H level voltage when the output voltage of the inverter IN2 is equal to or higher than the reference voltage between both ends of the Zener diode ZD1, and the output voltage of the inverter IN2 is the reference voltage between both ends of the Zener diode ZD1. If it is less than, the L level voltage is output. The latch circuit 411 is, for example, an SR flip-flop circuit, and when the input voltage input from the comparator CMP to the S terminal transitions from the L level to the H level, the input voltage input from the second timer 412 to the R terminal becomes L. The H level voltage is continuously output to the base of the switching element SW5 until the transition from the level to the H level. The second timer 412 starts counting when the output of the Q terminal of the latch circuit 411 transitions from the L level to the H level, and then when the number of counts reaches the number corresponding to the preset second reference time, The H level voltage is output to the R terminal of the latch circuit 411. Here, the second reference time is set, for example, based on the actual time between the sunset time and the sunrise time, and is set to, for example, 7 hours.

Here, the operation of the lighting device 1 according to the present embodiment will be described with reference to FIGS. 3 to 5. First, as shown in FIG. 5, as the surroundings of the lighting device 1 become darker, the output voltage Vs of the illuminance sensor 51 gradually decreases. Here, when the illuminance around the lighting device 1 is equal to or higher than the above-mentioned reference illuminance, the output voltage of the inverter IN2 is less than the above-mentioned reference voltage as shown in FIG. 4, and the output voltage of the comparator CMP is at the L level. It is maintained and the switching element SW5 is maintained in the off state. At this time, since DC power is not supplied from the power supply circuit 31 to the light emitting module 21, both the first light emitting unit 212 and the second light emitting unit 213 of the light emitting module 21 maintain the extinguished state. Then, at time T1, when the output voltage Vs of the illuminance sensor 51 reaches the voltage Vsth corresponding to the above-mentioned reference voltage, the output voltage of the inverter IN2 becomes equal to or higher than the above-mentioned reference voltage, and the comparator CMP to the latch circuit 411 S The voltage input to the terminal becomes H level. At this time, the voltage of the Q terminal of the latch circuit 411 is set to the H level. Then, the switching element SW5 is turned on, and DC power is supplied from the power supply circuit 31 to the light emitting module 21. Here, when the motion sensor 61 does not detect a person, the voltage output from the output port te1 of the motion sensor 61 to the base of the switching element SW4 is maintained at the L level, and the switching element SW4 is maintained in the off state. do. Then, the S terminal of the latch circuit 413 is pulled down to the voltage level of the output terminal teL on the low potential side of the power supply circuit 31 via the resistor R2, and the voltage of the S terminal of the latch circuit 413 is maintained at the L level. The L level voltage is output from the Q terminal of the latch circuit 413 to the base of the switching element SW1, and the switching element SW1 is maintained in the off state. Then, in the circuit including the first light emitting unit 212 and the second light emitting unit 213 shown in FIG. 3, since no current flows from the electrode pad 211a to the electrode pad 211b, the first light emitting unit 212 maintains the extinguished state. On the other hand, since the inverter IN1 shown in FIG. 4 outputs an H level voltage, the switching element SW2 is maintained in the ON state. In this case, in the circuit including the first light emitting unit 212 and the second light emitting unit 213 shown in FIG. 3, the second light emitting unit 213 is turned on by the current flowing from the electrode pad 211a to the electrode pad 211c. That is, at time T1, only the second light emitting unit 213 is turned on, and the first light emitting unit 212 is maintained in the extinguished state.

It is assumed that the motion sensor 61 detects a person at time T2 after time T1. In this case, the voltage output from the output port te1 of the motion sensor 61 to the base of the switching element SW4 changes to the H level, and the switching element SW4 is turned on. At this time, the voltage at the S terminal of the latch circuit 413 rises to a voltage level obtained by dividing the voltage generated at the output terminal teH on the high potential side of the power supply circuit 31 by the resistors R1 and R2, and from the Q terminal of the latch circuit 413. An H level voltage is output to the base of the switching element SW1, and the switching element SW1 is turned on and off. Then, in the circuit including the first light emitting unit 212 and the second light emitting unit 213 shown in FIG. 3, a current flows from the electrode pad 211a to the electrode pad 211b, so that the first light emitting unit 212 lights up. On the other hand, since the inverter IN1 shown in FIG. 4 outputs an L level voltage, the switching element SW2 is turned off. In this case, in the circuit including the first light emitting unit 212 and the second light emitting unit 213 shown in FIG. 3, no current flows from the electrode pad 211a to the electrode pad 211c, so that the second light emitting unit 213 is turned off. That is, at time T2, only the first light emitting unit 212 is turned on, and the second light emitting unit 213 is turned off.

After that, as shown in FIG. 5, immediately after the human sensor 61 stops detecting a person at time T3, the voltage output from the first timer 414 to the R terminal of the latch circuit 413 is maintained at the L level. Therefore, the voltage output from the Q terminal of the latch circuit 413 to the switching element SW1 and the inverter IN1 is maintained at the H level. Therefore, since the state in which the switching element SW1 is turned on and the switching element SW2 is turned off is maintained, the state in which only the first light emitting unit 212 is turned on and the second light emitting unit 213 is turned off is maintained. At this time, the output voltage from the output port te2 of the motion sensor 61 to the first timer 414 transitions from the L level to the H level, and the first timer 414 starts counting. Then, when the count number reaches the number corresponding to the above-mentioned first reference time dT at the time T4, the first timer 414 outputs the H level voltage to the R terminal of the latch circuit 413. As a result, the output of the Q terminal of the latch circuit 413 is reset to the L level again, the switching element SW2 is turned on, the switching element SW1 is turned off, only the second light emitting unit 213 is lit again, and the first light emitting unit 212 is turned on. Is turned off.

Further, the second timer 412 shown in FIG. 4 outputs an H level voltage to the R terminal of the latch circuit 411 when the elapsed time from the time T1 to be measured reaches the above-mentioned reference time. As a result, the output of the Q terminal of the latch circuit 411 is reset to the L level again, and the switching element SW5 is turned off. Then, both the first light emitting unit 212 and the second light emitting unit 213 are turned off. As described above, the lighting control unit 41 according to the present embodiment is the first when the illuminance detected by the illuminance sensor 51 becomes lower than the reference illuminance at night and when a person is present around the illuminance device 1. Only one light emitting unit 212 is turned on, and when there is no person around the lighting device 1, only the second light emitting unit 213 is turned on. As a result, when a person is present around the lighting device 1, it is possible to prevent the person from being irradiated with ultraviolet light, and inactivate bacteria, viruses, etc. during the time when no person is present around the lighting device 1. In order to do so, it is possible to irradiate the surroundings with ultraviolet light.

As described above, according to the lighting device 1 according to the present embodiment, the 14 first light emitting units 212 emit light in the wavelength band of visible light, and the 6 second light emitting units 213 are ultraviolet rays. It emits light in the wavelength band of light. The cover 11 is formed of a soft material that transmits light in the wavelength band of ultraviolet light, and covers the circuit board 211, the 14 first light emitting units 212, and the 6 second light emitting units 213. Then, the lighting control unit 41 lights the second light emitting unit 213 at night time when the illuminance detected by the illuminance sensor 51 is less than the above-mentioned reference illuminance. As a result, bacteria, viruses and the like can be inactivated by the ultraviolet light even in the night time zone when the sunlight including the ultraviolet light does not exist. Therefore, for example, by installing it in a public facility, a food and drink point, etc., it becomes possible to efficiently inactivate bacteria, viruses, etc. in these facilities.

In fact, a sample in which 59000000 CFU / ml of intestinal pathogenic bacteria was present grew to 880000 CFU / ml when left for 25 hours without irradiation with ultraviolet light. On the other hand, when the sample was continuously irradiated with ultraviolet light having a peak wavelength of 368.7 nm for 6 hours until the cumulative energy of the ultraviolet light irradiating the sample reached 1177.8 KJ / m ² , it decreased to 140000 CFU / ml. Furthermore, by continuing to irradiate the sample with ultraviolet light for an additional 19 hours until the cumulative energy of the ultraviolet light irradiating the sample reaches 4907.6 KJ / m ² , the amount can be reduced to less than 100 CFU / ml (98% or more sterilization). We have obtained the experimental results. From this, it can be seen that the lighting device 1 according to the present embodiment is effective for inactivating so-called intestinal pathogenic bacteria such as intestinal pathogenic bacteria and viruses.

Further, the wavelength band of the ultraviolet light emitted from the second light emitting unit 213 according to the present embodiment is 200 nm or more and 380 nm or less. As a result, when the second light emitting unit 213 is lit, the bacteria, viruses, and the like existing around the lighting device 1 can be efficiently inactivated.

Further, the cover 11 according to the present embodiment is made of a silicone resin. As a result, deterioration of the cover 11 is suppressed even if the cover 11 is continuously irradiated with ultraviolet light from the second light emitting unit 213.

Further, the lighting device 1 according to the present embodiment includes an illuminance sensor 51, a motion sensor 61, and a lighting control unit 41. Then, when the illuminance detected by the illuminance sensor 51 is equal to or less than the above-mentioned reference illuminance, the lighting control unit 41 turns on the first light emitting unit 212 to light the second light emitting unit 212 when a person is detected by the motion sensor 61. The light emitting unit 213 is maintained in the extinguished state. On the other hand, the lighting control unit 41 maintains the first light emitting unit 212 in the extinguished state when the illuminance detected by the illuminance sensor 51 is equal to or less than the above-mentioned reference illuminance and no person is detected by the motion sensor 61. , The second light emitting unit 213 is turned on. As a result, when a person is present around the lighting device 1, it is possible to prevent the person from being irradiated with ultraviolet light from the second light emitting unit 213, so that the person is exposed to the ultraviolet light. The impact can be reduced.

(Embodiment 2)
The lighting system according to the present embodiment is provided with a lighting device having no motion sensor or illuminance sensor, and a sensor unit having a motion sensor and an illuminance sensor and separate from the lighting device. It is different from the first form. The lighting system according to the present embodiment is used as so-called indirect lighting in which the light radiated from the lighting device is not directly applied to a person in a living space.

As shown in FIG. 6, the lighting system according to the present embodiment includes a lighting device 2001, a lighting control unit 2004, and a sensor unit 2005. In FIG. 6, the same reference numerals as those in FIG. 1A are attached to the same configurations as those in the first embodiment. The lighting device 2001 includes a plurality of (five in FIG. 6) flexible light emitting modules 21 and a long cover 11 for covering the light emitting modules 21, a lighting control unit, an illuminance sensor, and a person. It does not have a motion sensor. Further, the lighting device 2001 includes caps 12 and 2012 that are attached to both ends of the cover 11 in the longitudinal direction and seal the inside of the cover 11, and the cap 2012 has three conductive pieces for supplying a current to the light emitting module 21. A lead-out hole 2012a for leading the wires L11, L12, and L13 to the outside of the cap 2012 is bored. The three conductive wires L11, L12, and L13 derived from the cap 2012 are connected to the lighting control unit 2004. Further, the lighting control unit 2004 and the sensor unit 2005 are connected via three signal lines L21, L22, and L23. Here, as in the first embodiment, the light emitting module 21 has 14 first light emitting units 212 and 6 second light emitting units connected in parallel with 7 series 2 as shown in FIG. 3 (B). 213 and.

As shown in FIG. 7, the sensor unit 2005 includes an illuminance sensor 51 and a motion sensor 61. In FIG. 7, the same configuration as in the first embodiment is designated by the same reference numerals as those in FIG. The illuminance sensor 51 is connected to the lighting control unit 2004 via the signal line L23. Further, the output port te1 of the motion sensor 61 is connected to the lighting control unit 2004 via the signal line L21, and the output port te2 is connected to the lighting control unit via the signal line L22.

The lighting control unit 2004 is connected to the lighting device 2001 via conductive wires L11, L12, and L13. When the illuminance detected by the illuminance sensor 51 is equal to or less than the preset reference illuminance, the lighting control unit 2004 turns on the first light emitting unit 212 when a person is detected by the motion sensor 61, and the second light emitting unit 212 is turned on. The light emitting unit 213 is maintained in the extinguished state. On the other hand, in the lighting control unit 41, when the illuminance detected by the illuminance sensor 51 is equal to or less than the preset reference illuminance and no person is detected by the motion sensor 61, the first light emitting unit 212 is turned off. It is maintained and the second light emitting unit 213 is turned on.

The lighting control unit 2004 includes a power supply circuit 31, three switching elements SW1, SW4, SW5, three resistors R1, R2, R3, an inverter IN2, a Zener diode ZD1, a comparator CMP, and a latch circuit 411. It has a 413, a second timer 412, and a first timer 414. In the switching element SW5, the collector is connected to the output end teH on the high potential side of the power supply circuit 31, and the emitter is connected to the electrode pad 211a of the light emitting module 21 via the conductive wire L11. In the switching element SW1, the collector is connected to the electrode pad 211b of the light emitting module 21 via the conductive wire L12, the emitter is connected to the output end teL on the low potential side of the power supply circuit 31, and the base is connected to the collector of the switching element SW3. It is connected to the resistor R1. Further, the electrode pad 211c of the light emitting module 21 is connected to the output end teL on the low potential side of the power supply circuit 31 via the conductive wire L13. In the switching element SW4, the emitter is connected to the output end teL on the low potential side of the power supply circuit 31 via the pull-down resistor R2, and is connected to the S terminal of the latch circuit 413, and the collector is connected to the S terminal of the latch circuit 413 via the current limiting resistor R1. It is connected to the output end teH on the high potential side of the power supply circuit 31. Further, the base of the switching element SW4 is connected to the output port te1 of the motion sensor 61. The Q terminal of the latch circuit 413 is connected to the base of the switching element SW1. The comparator CMP, the Zener diode ZD1, the inverter IN2, the latch circuit 411, and the second timer 412 are connected in the same manner as in the first embodiment.

Here, the operation of the lighting system according to the present embodiment will be described with reference to FIGS. 7 and 8. First, as shown in FIG. 8, as the surroundings of the sensor unit 2005 become darker, the output voltage Vs of the illuminance sensor 51 gradually decreases. Here, when the ambient illuminance of the sensor unit 2005 is equal to or higher than the above-mentioned reference illuminance, the output voltage of the inverter IN2 is less than the above-mentioned reference voltage as shown in FIG. 4, and the output voltage of the comparator CMP is at the L level. The switching element SW5 is maintained in an off state, DC power is not supplied from the power supply circuit 31 to the light emitting module 21, and the first light emitting unit 212 and the second light emitting unit 213 of the light emitting module 21 maintain the extinguished state. Then, at time T1, when the output voltage Vs of the illuminance sensor 51 reaches the voltage Vsth corresponding to the above-mentioned reference voltage, the output voltage of the inverter IN2 becomes equal to or higher than the above-mentioned reference voltage, and the comparator CMP to the latch circuit 411 S The voltage input to the terminal becomes the H level, and the voltage of the Q terminal of the latch circuit 411 is set to the H level. Then, the switching element SW5 is turned on, DC power is supplied from the power supply circuit 31 to the light emitting module 21, and the second light emitting unit 213 shown in FIG. 3A is turned on.

Here, when the motion sensor 61 does not detect a person, the voltage output from the output port te1 of the motion sensor 61 to the base of the switching element SW4 is maintained at the L level, and the switching element SW4 is maintained in the off state. do. Then, the S terminal of the latch circuit 413 is maintained at a voltage level close to the voltage level of the output terminal teL on the low potential side of the power supply circuit 31, and the L level voltage is output from the Q terminal to the base of the switching element SW1 for switching. The element SW1 is maintained in the off state. In this case, in the circuit including the first light emitting unit 212 and the second light emitting unit 213 shown in FIG. 3B, no current flows from the electrode pad 211a to the electrode pad 211b, so that the first light emitting unit 212 is turned off. maintain. That is, at time T1, only the second light emitting unit 213 is turned on, and the first light emitting unit 212 is maintained in the extinguished state.

It is assumed that the motion sensor 61 detects a person at time T2 after time T1. In this case, the voltage output from the output port te1 of the motion sensor 61 to the base of the switching element SW4 changes to the H level, and the switching element SW4 is turned on. At this time, the voltage of the S terminal of the latch circuit 413 rises to the voltage level of the output terminal teH on the high potential side of the power supply circuit 31, and the H level voltage is output from the Q terminal of the latch circuit 413 to the base of the switching element SW1. Then, the switching element SW1 is turned on. In this case, in the circuit including the first light emitting unit 212 and the second light emitting unit 213 shown in FIG. 3B, a current flows from the electrode pad 211a to the electrode pad 211b, so that the first light emitting unit 212 lights up. That is, at time T2, both the first light emitting unit 212 and the second light emitting unit 213 are turned on.

After that, as shown in FIG. 8, immediately after the human sensor 61 stops detecting a person at time T3, the voltage output from the first timer 414 to the R terminal of the latch circuit 413 is maintained at the L level. Therefore, the voltage output from the Q terminal of the latch circuit 413 to the switching element SW1 is maintained at the H level, the switching element SW1 is maintained in the ON state, and the first light emitting unit 212 is maintained in the lit state. At this time, the output voltage from the output port te2 of the motion sensor 61 to the first timer 414 transitions from the L level to the H level, and the first timer 414 starts counting. Then, when the count number reaches the number corresponding to the first reference time dT, the first timer 414 outputs the H level voltage to the R terminal of the latch circuit 413. As a result, the output of the Q terminal of the latch circuit 413 is reset to the L level again, the switching element SW1 is turned off, and only the second light emitting unit 213 is turned on again.

Further, the second timer 412 shown in FIG. 4 outputs an H level voltage to the R terminal of the latch circuit 411 when the elapsed time from the time T1 to be measured reaches the above-mentioned reference time. As a result, the output of the Q terminal of the latch circuit 411 is reset to the L level again, and the switching element SW5 is turned off. Then, both the first light emitting unit 212 and the second light emitting unit 213 are turned off. As described above, the lighting control unit 41 according to the present embodiment is the first when there is a person around the sensor unit 2005 when the illuminance detected by the illuminance sensor 51 becomes lower than the reference illuminance at night. Both the 1 light emitting unit 212 and the 2nd light emitting unit 213 are turned on, and when no person is present around the sensor unit 2005, only the 2nd light emitting unit 213 is turned on.

As described above, according to the lighting system according to the present embodiment, the lighting control unit 2004 is second over the entire night time zone when the illuminance detected by the illuminance sensor 51 is less than the above-mentioned reference illuminance. The light emitting unit 213 is continuously turned on. As a result, bacteria, viruses and the like can be efficiently inactivated by ultraviolet light during the night time.

Further, according to the lighting system according to the present embodiment, the lighting device 2001 and the sensor unit 2005 are separate bodies. Therefore, the degree of freedom in the installation position of the sensor unit 2005 can be increased.

Although the embodiments of the present invention have been described above, the present invention is not limited to the configuration of each of the above-described embodiments. For example, the first light emitting unit 212 may be arranged in one row or three or more rows in parallel along the Y-axis direction. Alternatively, the second light emitting unit 213 may be arranged in parallel in two or more rows along the Y-axis direction.

In each embodiment, an example in which the cover 11 has a square tubular shape has been described, but the present invention is not limited to this, and a cylindrical cover having a cylindrical shape or a cross-sectional shape having another shape may be provided.

In each embodiment, an example in which the conductive wires L1, L2, L11, L12, and L13 are derived from only one end portion in the longitudinal direction of the illuminating device 1 has been described, but the present invention is not limited to this, and the conductive wire is the illuminating device. The configuration may be derived from each of both ends in the longitudinal direction of 1.

In the first embodiment, when the lighting control unit is at night and the illuminance detected by the illuminance sensor 51 becomes lower than the reference illuminance, when a person is present around the lighting device 1, the first light emitting unit 212 and Both of the second light emitting units 213 may be turned on, and only the second light emitting unit 213 may be turned on when there is no person around the lighting device 1. Further, in the second embodiment, when the lighting control unit is at night and the illuminance detected by the illuminance sensor 51 becomes lower than the reference illuminance, when a person is present around the lighting device 1, the first light emitting unit Only 212 may be turned on and the second light emitting unit 213 may be turned off, and when no person is present around the lighting device 1, only the second light emitting unit 213 may be turned on.

In each embodiment, the lighting control units 41 and 2004 turn on or turn on the first light emitting unit 212 and the second light emitting unit 213 depending on whether the output of the illuminance sensor 51 and the motion sensor 61 detect a person. An example of turning off the light has been described. However, the present invention is not limited to this, and even if the lighting control unit does not include, for example, an illuminance sensor 51 or a motion sensor 61, and the lighting control unit constantly lights both the first light emitting unit 212 and the second light emitting unit 213. good. Alternatively, the lighting control unit constantly lights only the second light emitting unit 213, and turns on or off only the first light emitting unit 212 depending on the output of the illuminance sensor 51 and whether or not the motion sensor 61 detects a person. It may be something to make.

The lighting devices 1 and 2001 according to each embodiment can be applied to a light source application of a photocatalyst (titanium oxide) in the medical and hygiene fields. Further, the lighting devices 1 and 2001 according to each embodiment are used in the industrial field for curing an ultraviolet curable resin in a semiconductor manufacturing device or the like, for detecting a fluorescent material contained in a printed matter, for an insect lamp, and for liquor yeast. It can be applied to the activation application of. Further, the lighting devices 1 and 2001 according to the embodiment have been confirmed to have various physiological actions such as antioxidant action, anti-inflammatory action and antihypertensive action in the field of agriculture for promoting coloring of strawberry fruits and in onion cultivation. It can be applied to the increasing use of. Further, the lighting devices 1 and 2001 according to each embodiment can be applied to whitening of dried squid, maintenance of freshness of food by bactericidal effect, and use of increasing storage stability in the food field.

Although the embodiments and modifications of the present invention have been described above, the present invention is not limited thereto. The present invention includes a combination of embodiments and modifications as appropriate, and modifications thereof as appropriate.

The lighting device of the present invention is suitable as a lighting device used in public facilities and restaurants that require inactivation of bacteria, viruses and the like.

1,2001: Lighting device, 11: Cover, 12,2012: Cap, 12a, 2012a: Lead hole, 21: Light emitting module, 31: Power supply circuit, 41,2004: Lighting control unit, 51: Illumination sensor, 61: Person Sensory sensor, 111: Cover body, 112: Rib, 211: Circuit board, 211a, 211b, 211c: Electrode pad, 212: First light emitting part, 212a, 213a: Light emitting element, 212b: Main body part, 212c: Recessed part, 212d : Color conversion member, 212e: Electrode, 213: Second light emitting part, 213d: Translucent member, 214, R1, R2, R3: Resistance, 215: Current regulator, 411,413: Latch circuit, 412: Second timer 414: 1st timer, 2005: sensor unit, AC: AC power supply, CMP: comparator, IN1, IN2: inverter, L1, L2, L11, L12, L13: conductive line, L21, L22, L23: signal line, SW1, SW2, SW3, SW4, SW5: Switching element, te1, te2: Output port, teH, teL: Output end, ZD1: Zener diode

Claims (3)

A long circuit board having flexibility, a plurality of first light emitting units mounted on the circuit board and connected in series to radiate light in the visible light wavelength band, and mounted on the circuit board and ultraviolet. The circuit board and the plurality of first light emitting portions formed of a plurality of second light emitting units connected in series for radiating light in the wavelength band of light and a soft material that transmits light in the wavelength band of ultraviolet light. And a long cover having flexibility to cover the plurality of second light emitting portions, the high potential side of the first series circuit composed of the plurality of first light emitting portions, and the plurality of second light emitting portions. The high potential side of the second series circuit made of the above is commonly connected to the first electrode pad arranged on the circuit board, and the low potential side of the first series circuit is arranged on the circuit board. It is electrically connected to a second electrode pad different from the one electrode pad, and the low potential side of the second series circuit is electrically connected to the first electrode pad and the third electrode pad different from the second electrode pad. The lighting equipment that has been installed,
A sensor unit having an illuminance sensor that detects the brightness of the surroundings and a motion sensor that detects the presence or absence of people around.
The first switching element inserted between the output end on the high potential side of the DC power supply and the first electrode pad, and the interposition between the output end on the low potential side of the DC power supply and the second electrode pad. It has an inserted second switching element and a third switching element inserted between the output end on the low potential side of the DC power supply and the third electrode pad, and is detected by the illuminance sensor. When the illuminance transitions from a state higher than the preset reference illuminance to a state of the reference illuminance or less, the first switching element is turned from the off state to the on state, and then when a person is detected by the human sensor. By turning the second switching element on and the third switching element off, the plurality of first light emitting units are turned on, and when a person is not detected by the human sensor, the second light emitting unit is turned on. A lighting control unit for lighting the plurality of second light emitting units by turning off the switching element and turning on the third switching element is provided.
Lighting system. The wavelength band of the ultraviolet light is 200 nm or more and 380 nm or less.
The lighting system according to claim 1. The cover is made of a silicone resin.
The lighting system according to claim 1 or 2.

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