UV irradiation device

Abstract

To provide a luminaire that can appropriately control light irradiation according to the distance to a detection target.SOLUTION: A luminaire according to an embodiment includes an illumination unit, a first detection unit, a second detection unit, and a control unit. The illumination unit irradiates an irradiation range with light. The first detection unit detects a detection target within a first detection range including the irradiation range. The second detection unit detects a distance to a detection target within a second detection range included in the irradiation range. The control unit controls the illumination unit on the basis of at least one of a detection result indicating whether the detection target exists within the first detection range and the distance to the detection target within the second detection range.SELECTED DRAWING: Figure 3

Description

[Technical Field]

[0001] An embodiment of the present invention comprises: Ultraviolet light irradiation device Regarding. [Background technology]

[0002] A lighting device controls a lighting unit that emits light to adjust the illumination or non-illumination of light corresponding to the location where the lighting device is installed. If the lighting device is equipped with a sensor, the lighting device controls the lighting unit based on the detection results of the sensor. For example, when a lighting device is installed in an exhibition facility such as a museum, the lighting device performs control such as turning on the light for a predetermined period of time when a viewer approaches within a predetermined range and turning off the light when the viewer leaves the predetermined range. In such control, it is necessary to set an appropriate illumination pattern corresponding to the usage environment of the lighting device so that the illumination amount does not exceed a predetermined value. For example, in the case of a lighting device using a fluorescent lamp, ultraviolet light emitted from the fluorescent lamp may adversely affect exhibits. Therefore, there is a demand for lighting devices that can emit light in accordance with the usage environment. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Laid-Open No. 2012-164570 [Patent Document 2] Japanese Patent Application Laid-Open No. 2003-92194 Summary of the Invention [Problem to be solved by the invention]

[0004] The problem that the present invention aims to solve is to realize light irradiation that is in line with the usage environment. Ultraviolet light irradiation device The purpose is to provide [Means for solving the problem]

[0005] The ultraviolet light irradiation device of the embodiment includes an illumination unit, a first detection unit, a second detection unit, and a control unit. The illumination unit irradiates an irradiation range with ultraviolet light. The first detection unit detects a detection target within a first detection range that includes the irradiation range. The second detection unit detects the distance to the detection target within a second detection range that is included in the irradiation range. The control unit outputs a detection result indicating whether or not the detection target is present within the first detection range, and the distance to the detection target within the second detection range. far away The control unit controls the illumination unit based on the detection result indicating that the detection target is not present within the first detection range and the distance between the detection target and the second detection unit is equal to or greater than a threshold. The control unit causes the illumination unit to emit ultraviolet light based on the detection result indicating that the detection target is not present within the first detection range and the distance between the detection target and the second detection unit is less than the threshold. [Effects of the Invention]

[0006] According to the present invention, light irradiation suited to the usage environment is realized. Ultraviolet light irradiation device can be provided. [Brief explanation of the drawings]

[0007] [Figure 1] FIG. 1 is a schematic diagram showing an example of the configuration of an illumination device according to an embodiment. [Figure 2A] FIG. 2A is a schematic diagram showing an example of a detection range of a detection unit of an illumination device according to an embodiment. [Figure 2B] FIG. 2B is a schematic diagram showing an example of an illumination range of the lighting unit of the lighting device according to the embodiment. [Figure 2C] FIG. 2C is a schematic diagram showing an example of the relationship between the detection range of the detection unit and the illumination range of the lighting unit of the lighting device according to the embodiment. [Figure 3] FIG. 3 is a block diagram illustrating an example of a lighting device according to an embodiment. [Figure 4] FIG. 4 is a diagram illustrating an example of control of the lighting device according to the embodiment. DETAILED DESCRIPTION OF THE INVENTION

[0008] The lighting device (10) of this embodiment includes an illumination unit (32), a first detection unit (35), a second detection unit (36), and a control unit (31). The illumination unit (32) irradiates light into an illumination range. The first detection unit (35) detects a detection target within a first detection range that includes the illumination range. The second detection unit (36) detects the distance to the detection target within a second detection range that is included in the illumination range. The control unit (31) controls the illumination unit (32) based on at least one of a detection result indicating whether or not the detection target is present within the first detection range and the distance to the detection target within the second detection range. This allows the lighting device (10) to irradiate light in accordance with the detection results of the first detection unit (35) and / or the second detection unit (36).

[0009] In the lighting device (10) of this embodiment, the control unit (31) controls the lighting unit (32) using a detection phase as an operating phase for setting an irradiation time and irradiation time interval based on a detection result indicating that a detection target is present within the first detection range. The control unit 31 controls the lighting unit (32) using a non-detection phase as an operating phase for setting an irradiation time and irradiation time interval different from those of the detection phase based on a detection result indicating that a detection target is not present within the first detection range. This allows the lighting device (10) to emit light in accordance with whether or not a detection target is detected within the first detection range.

[0010] In the lighting device (10) of the embodiment, the control unit (31) adjusts at least one of the irradiation time and the irradiation time interval in the operation phase based on the distance between the detection target and the second detection unit (36), thereby enabling the lighting device (10) to achieve appropriate light irradiation corresponding to the distance to the detection target.

[0011] In the lighting device (10) of the embodiment, the control unit (31) stops the irradiation of light from the lighting unit (32) when the distance between the detection target and the second detection unit (36) is equal to or shorter than the threshold distance. This allows the lighting device 10 to prevent the detection target from being irradiated with light more than necessary when the detection target approaches the lighting device 10 (light unit 32).

[0012] In the lighting device (10) of this embodiment, the second detection range includes the entire illumination range of the lighting unit (32), which allows the lighting device (10) to appropriately adjust the amount of light emitted from the lighting unit (32) when the detection target approaches the illumination range of the lighting unit (32).

[0013] Hereinafter, embodiments will be described with reference to the drawings. FIG. 1 is a schematic diagram showing an example of the configuration of a lighting device 10 according to an embodiment (an example of a diagram showing a light irradiation surface irradiated by the lighting device 10). The lighting device 10 includes an exterior frame 11, a lighting unit 12, a detection unit 13, an indicator 14, and a processing unit 15. The detection unit 13 includes a first sensor 16 and a second sensor 17. The exterior frame 11 forms the exterior of the lighting device 10. The lighting unit 12, the detection unit 13, and the indicator 14 are arranged on the surface of the exterior frame 11. The processing unit 15 is built into the interior of the exterior frame 11.

[0014] The lighting unit 12 includes a light source such as a group of light-emitting elements and a lamp. The lighting unit 12 emits light from the light source and irradiates the illumination range of the lighting unit 12 with light. The light irradiated from the light source is not particularly limited, but may be, for example, ultraviolet light, visible light, or infrared light. The light source may be appropriately set depending on the environment in which the lighting device 10 is used.

[0015] The detection unit 13 detects a detection target present within a detection range using a sensor or the like provided in the detection unit 13. The detection target may be, for example, a person, or may be a non-human object such as a desk, chair, or shelf. The first sensor 16 is a sensor whose detection range extends from a position some distance away from the lighting device 10 to the vicinity of the lighting device 10. The second sensor 17 detects a detection target located near the lighting device 10. The first sensor 16 and the second sensor 17 are different types of sensors. Therefore, the detection targets of the first sensor 16 and the second sensor 17 do not need to be the same. For example, the first sensor 16 may detect only living things (humans), and the second sensor 17 may detect all objects within its detection range, including living things.

[0016] The first sensor 16 provided in the detection unit 13 is, for example, a human presence sensor. The second sensor 17 provided in the detection unit 13 is, for example, an ultrasonic sensor. The human presence sensor is, for example, a pyroelectric infrared sensor (pyro sensor). The human presence sensor detects whether or not a detection target is within a detection range based on changes over time in the sensing results of the detection target within the detection range. If the amount of change in the sensing results within a predetermined period is equal to or greater than a predetermined threshold, the human presence sensor determines that a detection target is present within the detection range. If the amount of change in the sensing results within a predetermined period is less than the predetermined threshold, the human presence sensor determines that a detection target is not present within the detection range. Sensing by the human presence sensor is performed, for example, approximately once every few seconds, and it is preferable that sensing be performed multiple times within a predetermined period.

[0017] When the second sensor 17 is an ultrasonic sensor, the second sensor 17 includes a transmitter 171 and a receiver 172. In this case, the transmitter 171 can emit ultrasonic waves into space and transmit the ultrasonic waves. The receiver 172 can receive the ultrasonic waves transmitted through space. The receiver 172 receives the reflected waves of the ultrasonic waves transmitted from the transmitter 171 reflected by the detection target. In this case, as shown in FIG. 1, the first sensor 16 is preferably disposed between the transmitter 171 and the receiver 172. By disposing the first sensor 16 in this manner, the reflected waves reflected by the detection target can be effectively received. This is because disposing the receiver 172 away from the transmitter 171 can reduce the influence of the ultrasonic waves transmitted by the transmitter 171 being directly received by the receiver 172.

[0018] The first sensor 16 is not particularly limited as long as it has a wider detection range than the second sensor 17 and is capable of detecting whether or not a detection target exists within the detection range.

[0019] The indicator 14 notifies the operating state of the lighting device 10. The indicator 14 is configured, for example, with an LED (Light Emitting Device) or the like. The indicator 14 notifies the operating state of the lighting device 10, for example, by using a combination of the LED's lighting color, the number of flashes, and / or the flashing speed. When multiple indicators 14 are provided in the lighting device 10, each indicator 14 may notify the operating state of a specific component provided in the lighting device 10. In this embodiment, three indicators are provided as shown in FIG. 1. One indicator 14 notifies, for example, the operating state of the lighting unit 12. Another indicator 14 notifies, for example, the operating phase of the lighting device 10, which will be described later. Yet another indicator 14 notifies, for example, the operating state of a first sensor (a human presence sensor).

[0020] The processing unit 15 controls all of the components of the lighting device 10. The processing unit 15 includes a processor or an integrated circuit and a storage medium such as a memory. The processor or integrated circuit may include any of a central processing unit (CPU), an application specific integrated circuit (ASIC), a microcomputer, a field programmable gate array (FPGA), and a digital signal processor (DSP). In the lighting device 10, the processing unit 15 may include only one integrated circuit or multiple integrated circuits. In the lighting device 10, the processing unit 15 performs processing by executing a program or the like stored in a storage medium. In one example, at least a portion of the processing by the processing unit 15 may be performed by a processing device provided outside the lighting device 10. In another example, at least a portion of the processing by the processing unit 15 may be performed by a server in a cloud environment. In these cases, at least a portion of the processing by the lighting device 10 is performed outside the lighting device 10.

[0021] In lighting device 10 having such a configuration, as will be described later, processing unit 15 controls the light emission by lighting unit 12 based on the detection results of detection unit 13. Therefore, for example, when a moving detection target approaches lighting device 10, first sensor 16 of detection unit 13 detects the detection target. When the detection target approaches lighting device 10 further, second sensor 17 of detection unit 13 detects the detection target. Processing unit 15 controls lighting unit 12 in response to a combination of such multiple detection results. In this way, lighting device 10 can create an appropriate lighting environment in accordance with the movement of the detection target.

[0022] Next, the illumination range and detection range of the illumination unit 12 and the detection unit 13 (first sensor 16 and second sensor 17) will be described with reference to FIGS. 2A to 2C. FIGS. 2A to 2C are schematic diagrams showing an example of the detection range and illumination range of the illumination device 10 according to the embodiment. FIG. 2A shows the detection range of the first sensor 16 and the detection range of the second sensor 17 as the detection range of the detection unit 13. FIG. 2B shows the illumination range of the illumination unit 12. FIG. 2C shows the relationship between the detection range of the detection unit 13 and the illumination range of the illumination unit 12. The illumination device 10 defines a first direction (the direction indicated by arrows Z1 and Z2) and a second direction (the direction indicated by arrows XY1 and XY2) that intersects with the first direction. In the positions shown in FIGS. 2A to 2C, the first direction of the illumination device 10 coincides or substantially coincides with the vertical direction, and the second direction of the illumination device 10 coincides or substantially coincides with the horizontal direction. 2A to 2C, the lighting device 10 is provided vertically above. In this case, the lighting unit 12 illuminates an area vertically below the lighting device 10, and the detection unit 13 detects a detection target vertically below the lighting device 10.

[0023] The detection range and illumination range shown in FIGS. 2A to 2C are the detection range and illumination range when the lighting device 10 is viewed horizontally. When the lighting device 10 is viewed vertically from above, the detection range and illumination range of the lighting device 10 are, for example, circular or approximately circular. Therefore, the shapes of the detection ranges of the first sensor 16 and the second sensor 17 are, for example, conical or approximately conical. The shape of the illumination range of the lighting unit 12 is, for example, conical or approximately conical. However, the shapes of the illumination range of the lighting unit 12 and the detection range of the detection unit 13 are not limited to this as long as they satisfy the relationship between the illumination range and the detection range, as will be described later.

[0024] 2A to 2C, a first detection range SS1, a second detection range SS2, an illumination range SL, a first detection length HS1, a second detection length HS2, an illumination length HL, a first detection width WS1, a second detection width WS2, and an illumination width WL are defined. The first detection range SS1 is the detection range of the first sensor 16. The lower vertical end of the first detection range SS1 coincides or substantially coincides with the lower vertical end of the range in which the first sensor 16 can detect an object. The second detection range SS2 is the detection range of the second sensor 17. The lower vertical end of the second detection range SS2 coincides or substantially coincides with the lower vertical end of the range in which the second sensor 17 can detect a detection object. The illumination range SL is the illumination range of the lighting unit 12. The illumination range SL is, for example, the range in which light emitted from the lighting unit 12 reaches with an intensity equal to or greater than a specified value. The lower end of the illumination range SL in the vertical direction coincides or approximately coincides with the lower end of the vertical direction of the range that can be illuminated by the lighting unit 12. In the example of FIGS. 2A to 2C, the lower ends of the first detection range SS1 and the illumination range SL in the vertical direction coincide or approximately coincide with the target surface S, such as the floor or ground, that is illuminated by the lighting device 10.

[0025] The first detection length HS1 is the vertical height between the vertical bottom end of the first detection range SS1 and the lighting device 10 (the vertical bottom surface of the first sensor 16). The second detection length HS2 is the vertical height between the vertical bottom end of the second detection range SS2 and the lighting device 10 (the bottom surface of the second sensor 17). The illumination length HL is the vertical height between the vertical bottom end of the illumination range SL and the lighting device 10 (the bottom surface of the illumination unit 12, for example, the window portion that emits light). The first detection width WS1 is the horizontal width at the vertical bottom end of the first detection range SS1. The second detection width WS2 is the horizontal width at the vertical bottom end of the second detection range SS2. The illumination width WL is the horizontal width at the vertical bottom end of the illumination range SL of the illumination unit 12.

[0026] In one example, if the first sensor 16 is a pyroelectric motion sensor, the first detection range SS1 is a range in which the first sensor 16 can detect infrared rays emitted from a person. In this case, the first detection length HS1 is the height along the vertical direction between the lower vertical end of the first detection range SS1 and an infrared receiving window provided in the first sensor 16. In another example, if the second sensor 17 is an ultrasonic sensor, the second detection range SS2 is a range in which the second sensor can receive ultrasonic waves transmitted by the second sensor 17. In this case, the second detection length HS2 is the height along the vertical direction between the lower vertical end of the second detection range SS2 and a window through which the transmitter 171 transmits ultrasonic waves or a window through which the receiver 172 receives ultrasonic waves. Note that the second detection range SS2 may be a range in which the second sensor 17 can receive ultrasonic waves transmitted by the second sensor 17 with an intensity equal to or greater than a specified value.

[0027] In this case, as shown in FIG. 2A, the first detection range SS1 is wider than the second detection range SS2. Also, as shown in FIG. 2C, the illumination range SL is smaller than the first detection range SS1 and larger than the second detection range SS2. In this embodiment, the lighting unit 12 and the detection unit 13 are provided at the same or substantially the same position when viewed from the second direction. Therefore, the entire illumination range SL is included within the first detection range SS1. Also, the entire second detection range SS2 is included within the illumination range SL. Therefore, the first sensor 16 detects the detection target in a range that is the same as the illumination range SL of the lighting unit 12 and outside it. The second sensor 17 detects the detection target in a range that is the same as the illumination range SL of the lighting unit 12 or inside it. It is preferable that the first detection range SS1 is wider than the illumination range SL. It is preferable that the second detection range SS2 is the same as the illumination range SL.

[0028] Specifically, as shown in FIG. 2C, in terms of height, the second detection length HS2 is equal to or less than the first detection length HS1 and the irradiation length HL. In terms of width, the irradiation width WL is equal to or greater than the second detection width WS2 and equal to or less than the first detection width WS1. It is preferable that the second detection width WS2 is approximately the same as the irradiation width WL, and the first detection width WS1 is larger than the irradiation width WL. It is more preferable that both the detection range and the irradiation range satisfy the preferred height and width relationships. Note that the second detection length HS2 may be approximately the same as the irradiation length HL, and the first detection length HS1 may be larger than the irradiation length HL. Furthermore, the second detection range SS2 and the irradiation range SL may be similar in shape.

[0029] 1, first sensor 16, second sensor 17, and lighting unit 12 are respectively provided in lighting device 10, so first detection range SS1, second detection range SS2, and illumination range SL may not coincide with each other, as shown in, for example, FIGS. 2A to 2C. In this case, in FIGS. 2A to 2C, the apex (starting point) of first detection range SS1, the apex (starting point) of second detection range SS2, and the apex (starting point) of illumination range SL may be offset from one another. Even in this case, first detection range SS1, second detection range SS2, and illumination range SL have overlapping ranges.

[0030] Next, the functional configuration of the lighting device 10 will be described with reference to Fig. 3. Fig. 3 is a functional block diagram showing an example of the lighting device 10. The lighting device 10 includes a control unit 31, an illumination unit 32, a detection unit 33, and a notification unit 34. The detection unit 33 includes a first detection unit 35 and a second detection unit 36. The control unit 31, the illumination unit 32, the detection unit 33, and the notification unit 34 are capable of communicating with each other (capable of input and output).

[0031] The control unit 31 controls the operation of the lighting device 10. The control unit 31 controls the lighting device 10 according to processing described below. In this embodiment, a processor or integrated circuit of the processing unit 15 functions as the control unit 31. The lighting unit 32 turns the light source on or off according to the irradiation time specified by the control unit 31. In this embodiment, the lighting unit 12 functions as the lighting unit 32. The detection unit 33 detects a detection target present in the detection range. The first detection unit 35 and the second detection unit 36 ​​detect the detection target using a predetermined detection method. The second detection unit 36 ​​detects the detection target using a detection method different from the detection method of the first detection unit 35. In this embodiment, the detection unit 13 functions as the detection unit 33. The first sensor 16 functions as the first detection unit 35, and the second sensor 17 functions as the second detection unit 36. The notification unit 34 notifies the operating state of the lighting device 10, etc. In this embodiment, the indicator 14 functions as the notification unit 34.

[0032] Next, the control of the lighting operation of the lighting unit 32 by the control unit 31 will be described. The control unit 31 controls the irradiation time, irradiation intensity, irradiation wavelength, etc. of the lighting unit 32 based on the detection result of the detection unit 33. Below, as an example of the control of the lighting operation, a case where the control unit 31 controls the irradiation time of the lighting unit 32 based on the detection result of the detection unit 33 will be described. In this embodiment, the detection unit 33 includes a first detection unit 35 and a second detection unit 36. Specifically, the first detection unit 35 is a human presence sensor serving as the first sensor 16, and the second detection unit is an ultrasonic sensor serving as the second sensor 17. In this case, the first detection unit 35 outputs either detection of the detection target or non-detection of the detection target as the detection result of the first detection range. The second detection unit 36 ​​outputs the distance to the detection target as the detection result of the second detection range. Note that the detection ranges of the first detection unit 35 and the second detection unit 36 ​​may each be adjusted depending on the installation location of the lighting device 10. For example, when the lighting device 10 is installed near a shielding object such as a wall, each of the first detection unit 35 and the second detection unit 36 ​​detects the detection target in a detection range that is not blocked by the shielding object.

[0033] The control unit 31 selects an operation phase for the illumination unit 32 based on the detection result of the first detection unit. In the operation phase, a reference illumination time and irradiation time interval are set, and the illumination unit 32 performs illumination or non-illumination in accordance with these settings. The operation phases of the illumination unit 32 include a detection phase and a non-detection phase. The detection phase is a phase when a detection target is detected by the first detection unit 35 (first detection range). The non-detection phase is a phase when a detection target is not detected by the first detection unit 35 (first detection range). In the detection phase and the non-detection phase, reference illumination time and irradiation time interval are set, respectively. If the detection result of the first detection unit 35 is detection of a detection target, the control unit 31 selects the detection phase as the operation phase for the illumination unit 32. If the detection result of the first detection unit 35 is non-detection of a detection target, the control unit 31 selects the non-detection phase as the operation phase for the illumination unit 32. The illumination unit 32 emits light according to the illumination time and the illumination time interval defined in the operation phase selected by the control unit 31. The illumination time and the illumination time interval are set appropriately depending on the light source used in the illumination unit 32, the purpose of use of the illumination device 10, etc.

[0034] The control unit 31 adjusts the irradiation time and / or irradiation time interval in the selected operation phase from the reference irradiation time and / or irradiation time interval based on the distance to the detection target as a result of detection by the second detection unit 36. The control unit 31 sets a distance threshold for the distance to the detection target. The distance threshold is set appropriately depending on the light source used in the illumination unit 32, the intended use of the illumination device 10, etc. The control unit 31 does not change the reference irradiation time and / or irradiation time interval when the distance to the detection target is equal to or greater than the distance threshold. The control unit 31 changes the reference irradiation time and / or irradiation time interval when the distance to the detection target is less than the distance threshold. Note that when the distance threshold is set, the control unit 31 determines that the distance to the detection target is equal to or greater than the distance threshold even when the detection target is outside the second detection range (when the second detection unit 36 ​​cannot detect the distance).

[0035] The cumulative amount of light emitted from the illumination unit 32 varies depending on the illumination brightness, illumination intensity, and illumination time (s). Here, illumination brightness and illumination intensity are parameters expressed in units such as mW, lm, and lx, and are collectively referred to as illumination intensity hereinafter. Illumination intensity is inversely proportional to the square of the distance between the detection target and the illumination unit 32 (light source). The cumulative amount of light is the value obtained by multiplying the illumination intensity by the illumination time (illumination intensity × illumination time). In other words, the cumulative amount of light is proportional to both the illumination intensity and the illumination time. Therefore, the control unit 31 can change the effective cumulative amount of light by adjusting the illumination time and / or illumination time interval in the selected operation phase from the reference illumination time and / or illumination time interval. For example, if the distance to the detection target is less than a threshold distance, the control unit 31 shortens the illumination time of the illumination unit 32. In another example, if the distance to the detection target is less than a threshold distance, the control unit 31 lengthens the illumination time interval of the illumination unit 32. In yet another example, when the distance to the detection target is less than the threshold distance, the control unit 31 forcibly stops irradiation from the illumination unit 32. Note that the control unit 31 may change the effective integrated amount of light by controlling (adjusting) the irradiation intensity or irradiation wavelength of the illumination unit 32.

[0036] 4 is an explanatory diagram specifically explaining an example of control of the lighting device 10. The detection result of the first detection range indicates the detection result of the first detection unit 35. The detection result of the second detection range indicates the detection result of the second detection unit 36. The operation phase indicates the operation phase of the lighting device 10 selected based on the detection result of the first detection unit 35. The time adjustment of the irradiation time indicates whether the irradiation time set for the selected operation phase is adjusted based on the detection result of the second detection unit 36.

[0037] When the first detection unit 35 detects a detection target and the detection result of the second detection unit 36 ​​is equal to or greater than the distance threshold, the control unit 31 selects the detection phase as the operation phase and does not change the irradiation time and irradiation time interval in the detection phase from the reference irradiation time and irradiation time interval. That is, the control unit 31 controls the illumination unit 32 according to the irradiation time and irradiation time interval preset for the detection phase. In this case, the detection target is present, for example, in the first detection range, not the second detection range.

[0038] When the first detection unit 35 detects a detection target and the detection result of the second detection unit 36 ​​is less than the distance threshold, the control unit 31 selects the detection phase as the operation phase and changes the irradiation time or irradiation time interval in the detection phase from the reference irradiation time and irradiation time interval. That is, the control unit 31 controls the illumination unit 32 by changing the irradiation time or irradiation time interval from the irradiation time and irradiation time interval preset for the detection phase. The change in the irradiation time or irradiation time interval is appropriately made based on the distance of the detection result of the second detection unit 36. In this case, the detection target is present, for example, in a range that is both the first detection range and the second detection range.

[0039] If the first detection unit 35 does not detect the detection target and the detection result of the second detection unit 36 ​​is equal to or greater than the distance threshold, the control unit 31 selects the non-detection phase as the operating phase and does not change the illumination time and illumination time interval in the non-detection phase from the reference illumination time and illumination time interval. That is, the control unit 31 controls the illumination unit 32 according to the illumination time and illumination time interval preset for the non-detection phase. In this case, the detection target is, for example, outside the first detection range, or is not detected by the first detection unit 35 even if it is within the first detection range.

[0040] If the first detection unit 35 does not detect a detection target and the detection result of the second detection unit 36 ​​is less than the distance threshold, the control unit 31 selects the non-detection phase as the operating phase and changes the illumination time or illumination time interval in the non-detection phase from the reference illumination time and illumination time interval. That is, the control unit 31 controls the illumination unit 32 by changing the illumination time or illumination time interval from the illumination time and illumination time interval preset for the non-detection phase. The illumination time or illumination time interval is appropriately changed based on the distance of the detection result of the second detection unit 36. In this case, the detection target is present within the second detection range but is not detected by the first detection unit 35. For example, when the first sensor 16 is a human presence sensor, as in the configuration of this embodiment, this corresponds to a state in which a non-living object (human) is placed within the detection range or a state in which a human is not detected as a detection target due to the detection interval of the human presence sensor. In this case, the illumination time and / or illumination time interval may not be changed.

[0041] As described above, the lighting device 10 of this embodiment includes the lighting unit 32, the first detection unit 35, the second detection unit 36, and the control unit 31. The lighting unit 32 irradiates light into an illumination area. The first detection unit 35 detects a detection target within a first detection area that includes the illumination area. The second detection unit 36 ​​detects the distance to the detection target within a second detection area that is included in the illumination area. The control unit 31 controls the lighting unit 32 based on at least one of a detection result indicating whether or not a detection target is present within the first detection area and the distance to the detection target within the second detection area. This allows the lighting device 10 to irradiate light in accordance with the detection results of the first detection unit 35 and / or the second detection unit 36.

[0042] The control unit 31 of the lighting device 10 of this embodiment preferably controls the lighting unit 32 using a detection phase as an operating phase in which an irradiation time and an irradiation time interval are set, based on a detection result indicating that a detection target is present within the first detection range. The control unit 31 preferably controls the lighting unit 32 using a non-detection phase as an operating phase in which an irradiation time and an irradiation time interval are different from those of the detection phase, based on a detection result indicating that a detection target is not present within the first detection range. This allows the lighting device 10 to irradiate light in accordance with whether or not a detection target is detected within the first detection range.

[0043] It is preferable that the control unit 31 of the lighting device 10 of this embodiment adjusts at least one of the irradiation time and the irradiation time interval in the operation phase based on the distance between the detection target and the second detection unit 36. This allows the lighting device 10 to achieve appropriate light irradiation corresponding to the distance to the detection target.

[0044] It is preferable that the control unit 31 of the lighting device 10 of this embodiment stops the emission of light from the lighting unit 32 based on the fact that the distance between the detection target and the second detection unit 36 ​​is equal to or less than the threshold distance. This allows the lighting device 10 to prevent the detection target from being irradiated with light more than necessary when the detection target approaches the lighting device 10 (lighting unit 32).

[0045] The second detection range of the lighting device 10 of this embodiment preferably includes the entire illumination range of the lighting unit 32. This allows the lighting device 10 to appropriately adjust the amount of light emitted from the lighting unit 32 when the detection target approaches the illumination range of the lighting unit 32. This allows the lighting device 10 to achieve light emission that is suited to the usage environment.

[0046] (Variation) In one modified example, the control unit 31 may control the illumination unit 32 by prioritizing either the detection result of the first detection unit 35 or the detection result of the second detection unit 36. For example, when the control unit 31 controls the illumination unit 32 based on the detection result of the first detection unit 35, even if the second detection unit 36 ​​outputs its detection result to the control unit 31, the control unit 31 does not use the detection result of the second detection unit 36 ​​to control the illumination unit 32. When the first detection unit 35 (first sensor 16) is a human presence sensor and the second detection unit 36 ​​(second sensor 17) is an ultrasonic sensor, the control unit 31 controls the illumination unit 32 based on the detection result of the human presence sensor and does not use the detection result of the ultrasonic sensor to control the illumination unit 32. Similarly, when the control unit 31 controls the illumination unit 32 based on the detection result of the second detection unit 36, even if the first detection unit 35 outputs its detection result to the control unit 31, the control unit 31 does not need to use the detection result of the first detection unit 35 to control the illumination unit 32.

[0047] In one modified example, the lighting device 10 may have an illumination state switching mode and an illumination state fixed mode. In the illumination state switching mode, the control unit 31 switches the illumination state of the lighting unit 32 based on the detection results of the detection unit 13 (the first detection unit 35 and the second detection unit 36), as in the embodiment described above. In the illumination state fixed mode, the control unit 31 fixes the illumination state to a specific illumination state and controls the lighting unit 32. In the illumination state fixed mode, for example, the lighting unit 32 continues to emit light regardless of whether a detection target is detected or not. In this case, the indicator 14 notifies the user that the lighting device 10 is in the illumination state switching mode or the illumination state fixed mode by, for example, a combination of on and off. This allows the user of the lighting device 10 to easily recognize which mode the lighting device 10 is in.

[0048] According to at least one of these embodiments, the lighting device includes an illumination unit, a first detection unit, a second detection unit, and a control unit. The illumination unit irradiates light into an illumination range. The first detection unit detects a detection target within a first detection range that includes the illumination range. The second detection unit detects the distance to the detection target within a second detection range that is included in the illumination range. The control unit controls the illumination unit based on at least one of a detection result indicating whether the detection target is present within the first range and the distance to the detection target. This makes it possible to provide a lighting device that can emit light suited to the usage environment.

[0049] Although several embodiments of the present invention have been described, these embodiments are presented as examples and are not intended to limit the scope of the invention. These novel embodiments can be embodied in various other forms, and various omissions, substitutions, and modifications can be made without departing from the spirit of the invention. These embodiments and their modifications are included within the scope and spirit of the invention, and are also included in the scope of the invention and its equivalents as defined in the claims. The following are additional notes. [1] A lighting unit that irradiates light onto an irradiation area; a first detection unit that detects a detection target within a first detection range that includes the illumination range; a second detection unit that detects the distance to the detection target within a second detection range included in the irradiation range; a control unit that controls the illumination unit based on at least one of a detection result indicating whether the detection target is present within the first detection range and the distance to the detection target within the second detection range; A lighting device comprising: [2] The control unit controlling the illumination unit in a detection phase as an operation phase for setting an irradiation time and an irradiation time interval based on the detection result indicating that the detection target is present within the first detection range; and controlling the illumination unit to use a non-detection phase as the operation phase, the non-detection phase having an illumination time and an illumination time interval different from those of the detection phase, based on the detection result indicating that the detection target is not present within the first detection range. [1] The lighting device according to [1]. [3] The control unit adjusts at least one of an irradiation time and an irradiation time interval in the operation phase based on the distance between the detection target and the second detection unit. [2] The lighting device according to [2]. [4] The control unit stops the irradiation of light from the illumination unit based on the fact that the distance between the detection object and the second detection unit is equal to or shorter than a threshold distance. The lighting device according to [2] or [3]. [5 ] The second detection range includes the entire range of the illumination range as a detection range. The lighting device according to any one of [1] to [4]. [Explanation of symbols]

[0050] 10...lighting device, 11...exterior frame, 12...lighting unit, 13...detection unit, 14...indicator, 15...processing unit, 16...first sensor, 17...second sensor, 171...transmitter, 172...receiver, 31...control unit, 32...lighting unit, 33...detection unit, 34...notification unit, SS1...first detection range, SS2...second detection range, SL...illumination range, HS1...first detection length, HS2...second detection length, HL...illumination length, WS1...first detection width, WS2...second detection width, WL...illumination width.

Claims

1. an illumination unit that irradiates an irradiation area with ultraviolet light; a first detection unit that is a human presence sensor that detects a detection target within a first detection range that includes the irradiation range; a second detection unit that detects the distance to a detection target within a second detection range included in the irradiation range; a control unit that controls the illumination unit based on a detection result indicating whether or not a detection target exists within the first detection range and the distance to the detection target within the second detection range; Equipped with the control unit causes the illumination unit to irradiate the ultraviolet light based on the detection result indicating that the detection target is not present within the first detection range and based on the fact that the distance between the detection target and the second detection unit is equal to or greater than a threshold, and stops the illumination unit to irradiate the ultraviolet light based on the detection result indicating that the detection target is not present within the first detection range and based on the fact that the distance between the detection target and the second detection unit is less than a threshold. Ultraviolet light irradiation device.

2. The second detection range includes the entire range of the irradiation range as a detection range. The ultraviolet light irradiation device according to claim 1 .

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