JP2020167031A - Illumination system - Google Patents

Abstract

To obtain an illumination system that can further improve the function of spatial presentation.SOLUTION: An illumination system 10 includes a first illumination device 200 for irradiating a surrounding space with illumination light L1, and a second illumination device 300 for projecting projection light L2 for projecting a preset projection image 351a onto a predetermined region R. Further, the illumination system includes a measurement unit 440 for acquiring data of a measurement contrast ratio 460 of the projection image 351a projected on the predetermined region R, and a storage unit 410 for storing data of a required contrast ratio 450 of the preset projection image 351a. Further, the illumination system includes a calculation unit 420 for comparing the data of the measurement contrast ratio 460 with the data of the required contrast ratio of 450. The illumination system further includes a controller 430 for performing control so that when the measurement contrast ratio 460 is lower than the required contrast ratio 450, the measurement contrast ratio 460 is not less than the required contrast ratio 450.SELECTED DRAWING: Figure 8

Description

The present disclosure relates to a lighting system.

Conventionally, as an illumination system, an illumination light setting unit for setting an illumination light for illuminating a predetermined area, an image light setting unit for setting an image light for projecting a projected image, and an illumination light are irradiated. Those provided with a light projection unit that projects image light are known (see, for example, Patent Document 1).

In Patent Document 1, by irradiating the illumination light and superimposing the image light on the illumination light and projecting the image light, the function of space production is improved while maintaining the function required for the illumination of illuminating the space or an object. I am trying to do it.

JP-A-2015-091008

Although it is possible to improve the function of the space effect by using such a lighting system, it is preferable that the function of the space effect can be further improved.

Therefore, an object of the present disclosure is to obtain a lighting system capable of further improving the function of spatial production.

The lighting system according to the present disclosure includes a first lighting device that irradiates illumination light for illuminating the surrounding space, and a second lighting device that projects projected light for projecting a preset projected image onto a predetermined area. It is equipped with a lighting device. Further, the lighting system includes a measurement unit that acquires measurement contrast ratio data of a projected image projected on the predetermined area, and a storage unit that stores data of a required contrast ratio of a preset projected image. I have. Further, the lighting system includes a calculation unit that compares the measured contrast ratio data with the required contrast ratio data. Then, the lighting system includes a control unit that controls the measured contrast ratio to be equal to or higher than the required contrast ratio when the measured contrast ratio is lower than the required contrast ratio.

According to the present disclosure, it is possible to obtain a lighting system capable of further improving the function of spatial production.

It is a perspective view which shows typically the lighting system which concerns on one Embodiment. It is a perspective view which shows typically the state which the 1st lighting apparatus which concerns on one Embodiment is embedded and fixed in the through hole of the ceiling. It is a perspective view which shows typically the state before embedding and fixing the 1st lighting apparatus which concerns on one Embodiment in a through hole of a ceiling. It is an exploded perspective view which shows typically the 1st lighting apparatus which concerns on one Embodiment. It is a perspective view which shows typically the state which the 2nd lighting apparatus which concerns on one Embodiment is embedded and fixed in the through hole of the ceiling. It is a perspective view which shows typically the state before embedding and fixing the 2nd lighting apparatus which concerns on one Embodiment in a through hole of a ceiling. It is an exploded perspective view which shows typically the 2nd lighting apparatus which concerns on one Embodiment. It is a block diagram of the lighting system which concerns on one Embodiment. It is a flowchart which shows an example of the control process of the lighting system which concerns on one Embodiment. It is a flowchart which shows the 1st modification of the control process of the lighting system which concerns on one Embodiment. It is a flowchart which shows the 2nd modification of the control process of the lighting system which concerns on one Embodiment.

Hereinafter, the lighting device according to the present disclosure will be described in detail with reference to the drawings. The embodiments described below are comprehensive or specific examples. Numerical values, shapes, materials, components, arrangement positions and connection forms of components, steps, step order, and the like shown in the following embodiments are examples, and are not intended to be limited to the present disclosure. Further, among the components in the following embodiments, the components not described in the independent claims indicating the highest level concept are described as arbitrary components.

In addition, in the following, as a lighting system, a system that creates a sales floor space of a store such as a supermarket will be illustrated. Further, a downlight embedded in the ceiling is exemplified as a first lighting device that illuminates the surrounding space and a second lighting device that projects a projected image onto a predetermined area. Further, a spotlight attached to the top wall of the showcase as a lighting device for illuminating the products arranged in the sales floor space will be illustrated. Then, an example using an LED element as a light source unit of each lighting device will be illustrated.

[Lighting system configuration]
First, the configuration of the lighting system 10 according to the present embodiment will be described with reference to FIG. Here, FIG. 1 is a perspective view schematically showing the lighting system.

As shown in FIG. 1, a plurality of downlights illuminating the sales floor space 12 are embedded in the ceiling 15 of a store 11 such as a supermarket.

Further, the sales floor space 12 is provided with a showcase 13 for arranging the products 14, and a spotlight 100 is attached to the top wall 13a of the showcase 13.

In the present embodiment, a plurality of spotlights 100 are attached to the top wall 13a of the showcase 13 so as to illuminate the lower back side of the showcase 13, and each spotlight 100 is arranged on the product display shelf 13b. It illuminates 14.

At this time, it is preferable to be able to adjust the spectrum of the light emitted from the spotlight 100 or the downlight according to the light environment of the surrounding space in which the product (object) 14 is arranged. In this way, the appearance of the product (object) 14 can be maintained in a state close to a preferable appearance (desired appearance).

Further, in the present embodiment, the downlight has a substantially circular shape in a plan view, and a plurality of downlights are embedded in the ceiling 15 of the store 11 in a state of illuminating the lower part. In this way, the sales floor space 12 of the store 11 is illuminated by the downlight.

The sales floor space 12 can be illuminated so as to have a desired light environment (color, brightness, etc.) according to the purpose and preference. That is, the sales floor space 12 can be illuminated by a downlight so as to have a desired light environment such as a reddish space or a bluish space. For example, in the case of a reddish sales floor space 12, a downlight that irradiates light having a spectrum having a high intensity of a red wavelength is used. On the other hand, in the case of a bluish sales floor space 12, a downlight that irradiates light having a spectrum having a high intensity of a blue wavelength is used. As described above, a downlight that irradiates light having a spectrum suitable for setting the sales floor space 12 into a desired light environment is embedded in the ceiling 15 of the store 11.

Here, in the present embodiment, some of the downlights among the plurality of downlights are made to function as the second lighting device 300 that projects the projected image 315a onto the floor surface 16 of the sales floor space 12.

The second lighting device 300 is a device that projects a preset projected image 315a onto a predetermined area R of the floor surface 16, and the projected image 315a is an illumination image produced by the shadow of light. Examples of such a projected image 315a include an image of sunlight passing through trees, an image of a bright sea, an image of a dark sea, an image of a starry sky, and the like. Then, such a projected image 315a is projected by the second lighting device 300 onto a predetermined region of the projection symmetric plane such as the floor surface or the wall surface. FIG. 1 illustrates an image of sunlight passing through trees projected onto the floor surface 16 by a second lighting device 300.

Further, in the present embodiment, the second lighting device 300 is provided with a light / dark fluctuation module 350, which will be described later, and by driving the light / dark fluctuation module 350, an image in which sunlight through the trees is swaying is projected on the floor surface 16. It is possible to project.

As described above, the second lighting device 300 according to the present embodiment also has a function as light / dark fluctuation environmental lighting. The second lighting device 300 has a plurality of types of projected images 315a and a switch for switching the projected image, and by performing the switch switching operation, the projected image 315a projected on the projection symmetric plane can be obtained. It may be possible to switch.

Further, in the present embodiment, at least one of the other downlights that does not have the function as the second lighting device 300 is the first lighting that illuminates the peripheral space of the second lighting device 300. It is functioning as a device 200.

The first lighting device 200 has a dimming function so that the illuminance of the lighting light L1 emitted from the first lighting device 200 can be appropriately adjusted. The illuminance of the illumination light L1 can be adjusted, for example, by changing the output value of the light source unit 220 included in the first illumination device 200.

Then, by appropriately adjusting the illuminance of the illumination light L1 emitted from the first illumination device 200, the peripheral space of the second illumination device 300 is made to have a desired light environment.

As described above, in the present embodiment, the first lighting device 100 also has a function as dimming-based lighting.

The second lighting device 300 also has a dimming function, and by changing the output value of the light source unit 320 included in the second lighting device 300, the contrast ratio of light and darkness of the projected image 315a (the darkest). The difference in brightness between the brightest part and the brightest part) can be adjusted as appropriate.

As described above, the lighting system 10 according to the present embodiment includes at least one first lighting device 200 that irradiates the illumination light L1 for illuminating the peripheral space (the peripheral space of the second lighting device 300). I have. Further, the lighting system 10 includes a second lighting device 300 that projects projected light L2 for projecting a preset projected image 315a onto a predetermined region R.

When the spotlight 100 that illuminates the product 14 affects the surrounding space of the second lighting device 300, the spotlight 100 may also function as the dimming base lighting provided in the lighting system 10. Good.

By the way, even if the output value of the light source unit 320 of the second lighting device 300 is made constant, the contrast ratio of the light and darkness of the projected image 315a projected on the predetermined region R is the peripheral space (of the second lighting device 300). It also depends on the lighting environment of the surrounding space).

Therefore, depending on the light environment of the peripheral space (the peripheral space of the second lighting device 300), the contrast ratio between the light and dark of the projected image 315a may become small, and the projected image 315a may appear blurred.

Therefore, in the lighting system 10 according to the present embodiment, the shadow of the projected projected image 315a can be clearly seen even when the light environment of the peripheral space (the peripheral space of the second lighting device 300) changes. It is possible to control it. Specifically, the first illuminance device 200 illuminance or the second lighting device 200 illuminance or the second, depending on the light environment of the surrounding space, so that the contrast ratio of light and dark of the projected projected image 315a becomes a predetermined value or more (for example, 2 or more). The illuminance of the lighting device 300 of the above can be adjusted.

The contrast ratio of light and darkness required for the shadow of the projected projected image 315a to be clearly seen can be determined by, for example, sensitivity evaluation.

[Configuration of First Lighting Device 200]
Next, the configuration of the first lighting device 200 will be described with reference to FIGS. 2 to 4.

Here, FIG. 2 is a perspective view schematically showing a state in which the first lighting device is embedded and fixed in the through hole of the ceiling, and FIG. 3 is a perspective view before the first lighting device is embedded and fixed in the through hole of the ceiling. A perspective view schematically showing the state, FIG. 4 is an exploded perspective view schematically showing the first lighting device.

The first lighting device 200 is embedded and fixed in a ceiling hole (through hole) 15b formed so as to penetrate in the thickness direction of the ceiling 15, and is connected to a light source unit 220 provided in the first lighting device 200. Light is directed toward the sales floor space 12 (see FIGS. 2 and 3).

The first lighting device 200 has a main body 210 and a light source 220 (see FIG. 4). The light source unit 220 is housed in the main body unit 210, and is composed of, for example, a plurality of LEDs (light emitting elements) and an LED substrate (light emitting element base) on which a plurality of LEDs (light emitting elements) are arranged. Can be done.

The main body 210 includes a heat radiating section 211 that releases the heat generated by the light source 220 to the outside of the first lighting device 200. The heat radiating portion 211 can be formed by using, for example, an aluminum die cast having a high thermal conductivity, and the heat generated by the light source portion 220 can be radiated more efficiently.

The heat radiating unit 211 includes a heat radiating unit main body 211a to which the light source unit 220 is thermally connected, and a plurality of heat radiating fins 211b connected to the heat radiating unit main body 211a.

In the present embodiment, the heat radiating portion main body 211a includes a substantially disk-shaped top wall 211c and a peripheral wall 211d extending downward (on the sales floor space 12 side) from the peripheral edge of the top wall 211c. That is, the heat radiating portion main body 211a is formed with a storage space defined by the top wall 211c and the peripheral wall 211d and opened downward. Then, the first reflecting portion 212, which will be described later, is accommodated in this accommodating space. The plurality of heat radiation fins 211b are formed so as to project upward from the upper surface of the top wall 211c.

Further, in the present embodiment, the light source unit 220 is fixed to the central portion of the lower surface of the top wall 211c. In this way, by fixing the light source unit 220 to the central portion of the lower surface of the top wall 211c, the light source unit 220 and the top wall 211c (heat dissipation unit 211) are thermally connected. By doing so, the heat generated by the light source unit 220 is transmitted from the lower surface of the top wall 211c to the heat radiating unit 211, and is discharged from the heat radiating unit 211 to the outside of the first lighting device 200. When an LED substrate on which a plurality of LEDs are arranged is used as the light source unit 220, the LED substrate is fixed to the central portion of the lower surface of the top wall 211c with the plurality of LEDs facing downward. ..

Further, as shown in FIG. 4, the main body 210 is attached to the heat radiating section 211 to which the light source 220 is fixed, and the light emitted from the light source 220 is reflected so as to face downward. It has.

The first reflecting portion 212 includes a bottom wall 212a and an outer peripheral wall 212b extending upward from the outer peripheral edge portion of the bottom wall 212a. In the present embodiment, the bottom wall 212a has a shape in which a substantially circular opening (lower opening 212e) is formed in the center of the disk-shaped member, and has a substantially annular shape in a plan view.

On the other hand, the outer peripheral wall 212b has a substantially cylindrical shape, and the outer diameter of the outer peripheral wall 212b is formed so as to be slightly smaller than the inner diameter of the peripheral wall 211d of the heat radiating portion main body 211a. That is, the bottom wall 212a and the peripheral wall 212b are formed to have a size that can be accommodated in the accommodation space defined by the top wall 211c and the peripheral wall 211d.

Further, the reflector 212c extends from the peripheral edge of the opening (lower opening 212e) formed in the center of the bottom wall 212b. The reflector 212c can be formed of, for example, a PBT (polybutylene terephthalate) resin or the like, and has a substantially bowl shape whose diameter increases downward. An upper opening 212d that opens upward and a lower opening 212e that opens downward are formed at the upper and lower ends of the reflector 212c, respectively. The curved surface on the lower side of the reflector 212c is the reflector 212f.

Further, the main body portion 210 includes a second reflecting portion 213. A lens 230 that diffuses the light emitted from the light source unit 220 is arranged between the first reflection unit 212 and the second reflection unit 213. In the present embodiment, the lens 230 has a substantially disk shape, and can be formed by using, for example, a translucent acrylic resin or the like.

Further, the second reflecting portion 213 is arranged below the lens 230, and reflects (distributes) the light diffused by the lens 230 so as to face downward. The second reflecting portion 213 can be formed by using, for example, a steel plate, a resin, or the like.

The second reflective portion 213 extends radially outward from the main body portion 213a in which the upper opening 213c and the lower opening 213d are formed and the lower end of the main body portion 213a (the peripheral edge portion of the lower opening 213d). It is provided with a flange portion 213b. In the present embodiment, the lower opening 213d is the irradiation port of the first lighting device 200. Further, the outer diameter of the flange portion 213b is formed so as to be larger than the inner diameter of the ceiling hole 15b.

The main body 213a includes a substantially bowl-shaped auxiliary reflector 213e whose diameter increases downward, and a tubular portion 213f which is connected to the upper end of the auxiliary reflector 213e and into which a lens 230 is inserted. ing. The curved surface on the lower side of the auxiliary reflection plate 213e is the auxiliary reflection surface 213g.

Further, in the present embodiment, the second reflecting portion 213 is formed with a leaf spring mounting portion 213h to which the leaf spring 240 is mounted. Then, by sandwiching the ceiling 15 between the leaf spring 240 attached to the leaf spring mounting portion 213h and the flange portion 213b, the first lighting device 200 is embedded and fixed in the ceiling hole 15b of the ceiling 15. ..

The first illumination device 200 includes a dimming mechanism (not shown), and the illuminance of the illumination light L1 can be adjusted by changing the output value of the light source unit 220.

[Configuration of Second Lighting Device 300]
Next, the configuration of the second lighting device 300 will be described with reference to FIGS. 5 to 7.

Here, FIG. 5 is a perspective view schematically showing a state in which the second lighting device is embedded and fixed in the through hole of the ceiling, and FIG. 6 is a perspective view before the second lighting device is embedded and fixed in the through hole of the ceiling. A perspective view schematically showing the state, FIG. 7 is an exploded perspective view schematically showing the second lighting device.

The second lighting device 300 is embedded and fixed in a ceiling hole (through hole) 15b formed so as to penetrate the ceiling 15 in the thickness direction. The second lighting device 300 irradiates the projected light L2 toward the floor surface 16 so that the light from the light source unit 320 provided in the second lighting device 300 passes through the projected image 315a. The projected image 315a is projected onto a predetermined region R.

The second lighting device 300 has a main body unit 310 and a light source unit 320 (see FIG. 7). The light source unit 320 is housed in the main body unit 310, and is composed of, for example, a plurality of LEDs (light emitting elements) and an LED substrate (light emitting element base) on which a plurality of LEDs (light emitting elements) are arranged. Can be done.

The main body 310 includes a heat radiating section 311 that discharges the heat generated by the light source 320 to the outside of the second lighting device 300. The heat radiating section 311 can be formed by using, for example, an aluminum die-cast having a high thermal conductivity, and the heat generated by the light source section 320 can be radiated more efficiently.

The heat radiating unit 311 includes a heat radiating unit main body 311a to which the light source unit 320 is thermally connected, and a plurality of heat radiating fins 311b connected to the heat radiating unit main body 311a.

In the present embodiment, the heat radiating unit main body 311a includes a substantially disk-shaped top wall 311c and a peripheral wall 311d extending downward (on the sales floor space 12 side) from the peripheral edge of the top wall 311c. That is, the heat radiating portion main body 311a is formed with a storage space defined by the top wall 311c and the peripheral wall 311d and opened downward. Then, the first reflecting portion 312, which will be described later, is accommodated in this accommodating space. The plurality of heat radiation fins 311b are formed so as to project upward from the upper surface of the top wall 311c.

Further, in the present embodiment, the light source unit 320 is fixed to the central portion of the lower surface of the top wall 311c. In this way, by fixing the light source unit 320 to the central portion of the lower surface of the top wall 311c, the light source unit 320 and the top wall 311c (heat dissipation unit 311) are thermally connected. By doing so, the heat generated by the light source unit 320 is transmitted from the lower surface of the top wall 311c to the heat radiating unit 311 and discharged from the heat radiating unit 311 to the outside of the second lighting device 300. When an LED substrate on which a plurality of LEDs are arranged is used as the light source unit 320, the LED substrate is fixed to the central portion of the lower surface of the top wall 311c in a state where the plurality of LEDs face downward. ..

Further, the second lighting device 300 includes a light / dark fluctuation module 350, and by driving the light / dark fluctuation module 350, it is possible to project an image in which the projected image 315a such as sunlight through the trees is fluctuating on the floor surface 16. I am doing it.

In the present embodiment, the light-dark fluctuation module 350 is formed by attaching an actuator (not shown) as a driving member to the light-dark slide member 351 on which the projected image 315a is formed. Then, by driving the actuator, the light / dark slide member 351 slides back and forth and left and right (horizontal plane direction).

The light / dark fluctuation module 350 is fixed to the lower surface of the top wall 311c or the like in a state where the light from the light source unit 320 is transmitted through the projected image 315a.

By doing so, the projected image 315a moving in the front-back and left-right directions (horizontal plane direction) is projected on the predetermined region R, and an image in which the projected image 315a is swaying is projected on the floor surface 16.

Further, as shown in FIG. 7, the main body unit 310 is attached to the heat radiating unit 311 to which the light source unit 320 is fixed, and the light emitted from the light source unit 320 is reflected so as to face downward. It has.

The first reflective portion 312 includes a bottom wall 312a and an outer peripheral wall 312b extending upward from the outer peripheral edge of the bottom wall 312a. In the present embodiment, the bottom wall 312a has a shape in which a substantially circular opening (lower opening 312e) is formed in the center of the disk-shaped member, and has a substantially annular shape in a plan view.

On the other hand, the outer peripheral wall 312b has a substantially cylindrical shape, and the outer diameter of the outer peripheral wall 312b is formed so as to be slightly smaller than the inner diameter of the peripheral wall 311d of the heat radiating portion main body 311a. That is, the bottom wall 312a and the peripheral wall 312b are formed to have a size that can be accommodated in the accommodation space defined by the top wall 311c and the peripheral wall 311d.

Further, a reflector 312c extends from the peripheral edge of the opening (lower opening 312e) formed in the center of the bottom wall 312b. The reflector 312c can be formed of, for example, a PBT (polybutylene terephthalate) resin or the like, and has a substantially bowl shape whose diameter increases downward. At the upper and lower ends of the reflector 312c, an upper opening 312d that opens upward and a lower opening 312e that opens downward are formed, respectively. The curved surface on the lower side of the reflector 312c is the reflector 312f.

Further, the main body portion 310 includes a second reflecting portion 313. A lens 330 that diffuses the light emitted from the light source unit 320 is arranged between the first reflection unit 312 and the second reflection unit 313. In the present embodiment, the lens 330 has a substantially disk shape, and can be formed by using, for example, a translucent acrylic resin or the like.

Further, the second reflecting portion 313 is arranged below the lens 330, and reflects (distributes) the light diffused by the lens 330 so as to face downward. The second reflecting portion 313 can be formed by using, for example, a steel plate, a resin, or the like.

The second reflecting portion 313 extends radially outward from the main body portion 313a in which the upper opening 313c and the lower opening 313d are formed and the lower end of the main body portion 313a (the peripheral edge of the lower opening 313d). It is provided with a flange portion 313b. In the present embodiment, the lower opening 313d is the irradiation port of the second lighting device 300. Further, the outer diameter of the flange portion 313b is formed so as to be larger than the inner diameter of the ceiling hole 15b.

The main body portion 313a includes a substantially bowl-shaped auxiliary reflector 313e whose diameter increases downward, and a tubular portion 313f which is connected to the upper end of the auxiliary reflector 313e and into which a lens 330 is inserted. ing. The curved surface on the lower side of the auxiliary reflection plate 313e is the auxiliary reflection surface 313g.

Further, in the present embodiment, the second reflecting portion 313 is formed with a leaf spring mounting portion 313h to which the leaf spring 340 is mounted. Then, by sandwiching the ceiling 15 between the leaf spring 340 attached to the leaf spring mounting portion 313h and the flange portion 313b, the second lighting device 300 is embedded and fixed in the ceiling hole 15b of the ceiling 15. ..

The third lighting device 300 is provided with a dimming mechanism (not shown), and the illuminance of the projected light L2 can be adjusted by changing the output value of the light source unit 320.

Further, in the main body 310 of the second lighting device 300, a measuring unit 440 for acquiring data of the contrast ratio of light and dark of the projected image 315a projected on the predetermined region R of the floor surface 16 is arranged. The measurement unit 440 is arranged at a position outside the irradiation region of the projected light L2 emitted from the lower opening (irradiation port) 313d. In this embodiment, the measurement unit 440 arranged on the flange portion 313b is illustrated. Further, the measuring means 440 is exposed to the sales floor space 12 in a state where the second lighting device 300 is embedded and fixed in the ceiling 15 of the store 11.

[Functional configuration of lighting system]
Next, the functional configuration of the lighting system 10 will be described with reference to FIG. Here, FIG. 8 is a block diagram of the lighting system.

As shown in FIG. 8, the lighting system 10 includes a storage unit 410, a calculation unit 420, a control unit 430, and a measurement unit 440.

The storage unit 410 stores data of the contrast ratio of light and darkness (required contrast ratio 450) necessary for clearly seeing the shadow of the projected projected image 315a. In the present embodiment, the second lighting device 300 includes a plurality of types of projected images 315a, and the contrast ratio of light and dark required for each projected image 315a (for each pattern of lighting fluctuation environment lighting) is set in advance. Then, the storage unit 410 stores the data of the contrast ratio of light and dark required for each projected image 315a as the data of the required contrast ratio 450.

The calculation unit 420 determines (calculates) whether or not the measurement contrast ratio 460 measured by the measurement unit 440 is a value of the required contrast ratio 450 or more stored in the storage unit 410. That is, the calculation unit 420 compares the data of the measurement contrast ratio 460 and the data of the required contrast ratio 450, and determines (calculates) whether or not the measurement contrast ratio 460 is a value of the required contrast ratio 450 or more. There is.

The control unit 430 controls so that the measured contrast ratio 460 becomes the required contrast ratio 450 or more when the measured contrast ratio 460 is smaller than the required contrast ratio 450. Specifically, the control unit 430 adjusts the output value 470 of the light source unit 320 of the second lighting device 300 and the output value 480 of the light source unit 220 of the first lighting device 200 to increase the measured contrast ratio 460. It is controlled so that the required contrast ratio is 450 or more.

As described above, the measurement unit 440 is arranged at a position outside the irradiation region of the projected light L2 emitted from the irradiation port 313d, and the contrast ratio of light and darkness (measurement contrast) of the projected image 315a actually projected. The data of the ratio 460) is acquired.

The lighting system 10 having such a function makes it possible to clearly see the shadow of the projected projected image 315a.

[Example of lighting system control processing]
Next, an example of the control process of the lighting system will be described with reference to FIG.

Here, FIG. 9 is a flowchart showing an example of the control process of the lighting system.

First, the required contrast ratio 450 is stored in the storage unit 410 (S11).

Specifically, the storage unit 410 stores the required contrast ratio 450 for each projected image 315a (for each pattern of illumination fluctuation environment illumination).

Then, in step S11, the power of the second lighting device 300 and the first lighting device 200 in which the required contrast ratio 450 is stored in the storage unit 410 is turned on (S12).

In this way, when the power of the lighting device is turned on, the measuring unit 440 moves the contrast ratio (measurement) of light and dark in the irradiation area (predetermined area R) of the light source unit 320 of the second lighting device (bright / dark fluctuation environment lighting) 300. The contrast ratio 460) is measured (S13).

The measurement of the measurement contrast ratio 460 by the measurement unit 440 may be performed immediately after the power of the lighting device is turned on, or after a lapse of a predetermined time (for example, the surrounding light environment is relatively stable). It may be done after the lapse of time required to become).

Next, the calculation unit 420 determines whether the measurement contrast ratio 460 is smaller than the required contrast ratio 450 based on the data of the measurement contrast ratio 460 and the data of the required contrast ratio 450 measured by the measurement unit 440 (calculation). (S14).

Then, when it is determined as "NO" in step S14, the control process of the lighting system is terminated without proceeding to step S15.

On the other hand, if it is determined as "YES" in step S14, the process proceeds to step S15.

That is, when the calculation unit 420 determines in step S14 that the measured contrast ratio 460 is smaller than the required contrast ratio 450, the output value 470 of the light source unit 320 of the second lighting device (bright / dark fluctuation environment lighting) 300 is the maximum. Is determined (S15).

Whether or not the output value 470 of the light source unit 320 is the maximum may be determined by the calculation unit 420 or the control unit 430.

Then, if it is determined as "NO" in step S15, the process proceeds to step S16.

That is, when the output value 470 of the light source unit 320 of the second lighting device (bright / dark fluctuation environment lighting) 300 is not maximized, the output value 470 of the light source unit 320 of the second lighting device 300 is increased ( S16).

The control unit 430 adjusts (controls to increase) the output value 470 of the light source unit 320.

Then, after the control unit 430 increases the output value 470 of the light source unit 320, the process proceeds to step S13.

On the other hand, if it is determined as "YES" in step S15, the process proceeds to step S17.

That is, in step S15, when it is determined that the output value 470 of the light source unit 320 of the second lighting device (bright / dark fluctuation environment lighting) 300 is maximized, the first lighting device (dimming base lighting) 200 It is determined whether the output value 480 of the light source unit 220 of the above is the minimum (S17).

The calculation unit 420 or the control unit 430 may determine whether or not the output value 470 of the light source unit 220 is the maximum.

Then, if it is determined as "NO" in step S17, the process proceeds to step S18.

That is, when the output value 480 of the light source unit 220 of the first lighting device (dimming base lighting) 200 is not minimized, the output value 480 of the light source unit 220 of the first lighting device 200 is reduced ( S18).

The control unit 430 adjusts (controls to reduce) the output value 480 of the light source unit 220.

Then, after the control unit 430 reduces the output value 480 of the light source unit 220 of the first lighting device 200, the process proceeds to step S13.

On the other hand, if "YES" is determined in step S17, the control process of the lighting system ends.

By performing such control processing, the second lighting device 300 can project a projected image 315a having a required contrast ratio of 450 or more on a predetermined region R of the floor surface 16.

[Modification of lighting system control processing]
FIG. 9 exemplifies an example in which the contrast ratio of light and darkness of the projected image 315a is automatically adjusted only once when the power of the lighting device is turned on, but the present invention is not limited to this, and is shown in FIGS. 10 and 11. It can also be a control process.

Here, FIG. 10 is a flowchart showing a first modification of the control process of the lighting system, and FIG. 11 is a flowchart showing a second modification of the control process of the lighting system. The specific measurement method and calculation method are basically the same as the methods described with reference to FIG.

FIG. 10 shows an example of a control process that automatically adjusts the contrast ratio of light and dark of the projected image 315a every moment and continuously when the power of the lighting device is turned on, and the following control is performed. It is said.

First, the required contrast ratio 450 is stored in the storage unit 410 (S21).

Next, the power of the second lighting device 300 and the first lighting device 200 in which the required contrast ratio 450 is stored in the storage unit 410 in step S21 is turned on (S22).

Then, when the power of the lighting device is turned on, the measuring unit 440 moves the contrast ratio (measured contrast ratio) of light and dark in the irradiation area (predetermined area R) of the light source unit 320 of the second lighting device (bright / dark fluctuation environment lighting) 300. 460) is measured (S23).

Next, the calculation unit 420 determines whether the measurement contrast ratio 460 is smaller than the required contrast ratio 450 based on the data of the measurement contrast ratio 460 and the data of the required contrast ratio 450 measured by the measurement unit 440 (calculation). (S24).

Then, when it is determined as "NO" in step S24, the process proceeds to step S23, and the measurement unit 440 measures a new measurement contrast ratio 460.

On the other hand, if it is determined as "YES" in step S24, the process proceeds to step S25.

That is, when the calculation unit 420 determines in step S24 that the measured contrast ratio 460 is smaller than the required contrast ratio 450, the output value 470 of the light source unit 320 of the second lighting device (bright / dark fluctuation environment lighting) 300 is the maximum. Is determined (S25).

Then, if it is determined as "NO" in step S25, the process proceeds to step S26.

That is, when the output value 470 of the light source unit 320 of the second lighting device (bright / dark fluctuation environment lighting) 300 is not maximized, the output value 470 of the light source unit 320 of the second lighting device 300 is increased ( S26).

Then, after the control unit 430 increases the output value 470 of the light source unit 320, the process proceeds to step S23.

On the other hand, if it is determined as "YES" in step S25, the process proceeds to step S27.

That is, in step S25, when it is determined that the output value 470 of the light source unit 320 of the second lighting device (bright / dark fluctuation environment lighting) 300 is maximized, the first lighting device (dimming base lighting) 200 It is determined whether the output value 480 of the light source unit 220 of the above is the minimum (S27).

Then, if it is determined as "NO" in step S27, the process proceeds to step S28.

That is, when the output value 480 of the light source unit 220 of the first lighting device (dimming base lighting) 200 is not minimized, the output value 480 of the light source unit 220 of the first lighting device 200 is reduced ( S28).

Then, after the control unit 430 reduces the output value 480 of the light source unit 220 of the first lighting device 200, the process proceeds to step S23.

If "YES" is determined in step S27, the process proceeds to step S23, and the measurement unit 440 measures a new measurement contrast ratio of 460.

As described above, in the control process shown in FIG. 10, when the power of the lighting device is turned on, the contrast ratio of light and dark of the projected image 315a is automatically adjusted moment by moment and continuously.

The control process shown in FIG. 10 ends, for example, by turning off the power supply.

Further, FIG. 11 shows an example of a control process that automatically adjusts the contrast ratio of light and dark of the projected image 315a at a predetermined time with the power of the lighting device turned on, and the following control is shown. Is done.

First, the required contrast ratio 450 is stored in the storage unit 410 (S31).

Next, the power of the second lighting device 300 and the first lighting device 200 in which the required contrast ratio 450 is stored in the storage unit 410 in step S31 is turned on (S32).

In this way, when the power of the lighting device is turned on, it is determined whether the time is a predetermined time set in advance such as 6 o'clock or 12 o'clock (S33).

If "NO" is determined in step S33, the control in step S33 is repeated.

On the other hand, if it is determined as "YES" in step S33, the process proceeds to step S34.

That is, the measurement unit 440 measures the contrast ratio (measurement contrast ratio 460) of light and dark in the irradiation region (predetermined region R) of the light source unit 320 of the second lighting device (bright and dark fluctuation environment lighting) 300 (S34).

Next, the calculation unit 420 determines whether the measurement contrast ratio 460 is smaller than the required contrast ratio 450 based on the data of the measurement contrast ratio 460 and the data of the required contrast ratio 450 measured by the measurement unit 440 (calculation). (S35).

Then, if it is determined as "NO" in step S35, the control process of the lighting system is terminated without proceeding to step S36.

On the other hand, if it is determined as "YES" in step S35, the process proceeds to step S36.

That is, when the calculation unit 420 determines in step S35 that the measured contrast ratio 460 is smaller than the required contrast ratio 450, the output value 470 of the light source unit 320 of the second lighting device (bright / dark fluctuation environment lighting) 300 is the maximum. Is determined (S36).

Then, if it is determined as "NO" in step S36, the process proceeds to step S37.

That is, when the output value 470 of the light source unit 320 of the second lighting device (bright / dark fluctuation environment lighting) 300 is not maximized, the output value 470 of the light source unit 320 of the second lighting device 300 is increased ( S37).

Then, after the control unit 430 increases the output value 470 of the light source unit 320, the process proceeds to step S34.

On the other hand, if it is determined as "YES" in step S36, the process proceeds to step S38.

That is, in step S36, when it is determined that the output value 470 of the light source unit 320 of the second lighting device (bright / dark fluctuation environment lighting) 300 is maximized, the first lighting device (dimming base lighting) 200 It is determined whether the output value 480 of the light source unit 220 of the above is the minimum (S38).

Then, if it is determined as "NO" in step S38, the process proceeds to step S39.

That is, when the output value 480 of the light source unit 220 of the first lighting device (dimming base lighting) 200 is not minimized, the output value 480 of the light source unit 220 of the first lighting device 200 is reduced ( S39).

Then, after the control unit 430 reduces the output value 480 of the light source unit 220 of the first lighting device 200, the process proceeds to step S34.

On the other hand, if "YES" is determined in step S38, the control process of the lighting system ends.

When the contrast ratio of the light and darkness of the projected image 315a is automatically adjusted at a plurality of times, the process proceeds to step S33 when it is determined as "YES" in step S38.

As described above, in the control process shown in FIG. 11, the contrast ratio between the light and dark of the projected image 315a is automatically adjusted when a predetermined time is reached with the power of the lighting device turned on.

The control process shown in FIG. 11 can also be terminated by turning off the power supply.

When performing the control process shown in FIG. 11, it is preferable that the lighting device is provided with a means such as a clock that can recognize the time.

Further, the lighting system may be provided with a timer so that the contrast ratio of light and dark of the projected image 315a is automatically adjusted at predetermined intervals.

[Action, effect]
As described above, the lighting system 10 according to the present embodiment includes a first lighting device 200 that irradiates the illumination light L1 for illuminating the surrounding space. Further, the lighting system 10 includes a second lighting device 300 that projects projected light L2 for projecting a preset projected image 351a onto a predetermined region R. Further, the lighting system 10 stores the measurement unit 440 that acquires the data of the measurement contrast ratio 460 of the projected image 351a projected on the predetermined area R, and the data of the required contrast ratio 450 of the projected image 351a that is set in advance. It includes a storage unit 410. Further, the lighting system 10 includes a calculation unit 420 that compares the data of the measured contrast ratio 460 with the data of the required contrast ratio 450. The lighting system 10 includes a control unit 430 that controls the measured contrast ratio 460 to be the required contrast ratio 450 or more when the measured contrast ratio 460 is lower than the required contrast ratio 450.

In this way, even when the light environment of the peripheral space (the peripheral space of the second lighting device 300) changes, the shadow of the projected projected image 315a can be clearly seen.

As described above, according to the present embodiment, it is possible to obtain the lighting system 10 capable of further improving the function of spatial effect.

Then, when the measured contrast ratio 460 is lower than the required contrast ratio 450, the control unit 430 may control the output value of the light source unit 320 of the second lighting device 300 to be high.

By doing so, the shadow of the projected projected image 315a can be made clearer, and the function of spatial effect can be further improved.

Further, when the measured contrast ratio 460 is lower than the required contrast ratio 450, the control unit 430 may control the output value of the light source unit 220 of the first lighting device 200 to be low.

By doing so, the peripheral space (the peripheral space of the second lighting device 300) becomes relatively dark, so that the contrast ratio between the light and dark of the projected image 315a becomes relatively high, and the shadow of the projected projected image 315a becomes clearer. Will be able to. As a result, the function of space production can be further improved.

Although the preferred embodiment of the present disclosure has been described above, the present disclosure is not limited to the above embodiment, and various modifications are possible.

For example, in the above embodiment, the shape of the irradiation ports 213d and 313d is circular, but the shape of the irradiation ports 213d and 313d may be a rectangle or another polygon.

Further, in the above embodiment, the downlight is exemplified as the lighting device, but it is also possible to use another lighting device such as a square base light or another embedded lighting device or a ceiling light. Further, the installation location and application of the lighting device are not limited to the above-mentioned location and application.

Further, in the above embodiment, the light emitting module having a COB structure is exemplified as the light emitting module, but it may be an SMD (Surface Mount Device) type.

Further, in the above embodiment, an LED is used as the light emitting element of the light emitting module, but a semiconductor light emitting element such as a semiconductor laser or a solid light emitting element such as an organic EL (Electro Luminescence) or an inorganic EL may be used. ..

Further, in the above embodiment, as the light / dark fluctuation module, a module in which the light / dark slide member is driven by an actuator is illustrated, but other modules such as a liquid crystal module and a DMD module can also be used.

Further, in the above embodiment, the one in which the control unit or the like is provided in each lighting device (built-in one) is illustrated, but the control device provided with the control unit or the like of each lighting device is provided, and each lighting is provided by the control device. The device may be controlled. Further, it is also possible to make a lighting system including a control device provided with a control unit or the like of each lighting device.

Further, in the above embodiment, an example of a lighting system including a first lighting device that illuminates the sales floor space of a store such as a supermarket and a second lighting device that projects a projected image on the floor surface of the sales floor space. are doing. That is, an example is shown in which a lighting system is configured in a store such as a supermarket. However, the location of the lighting system can be various. For example, it is possible to apply the present disclosure to a home lighting system, or to apply the present disclosure to a museum, an art museum, or the like. It is also possible to apply this disclosure to rest spaces such as underground malls and concourses such as train stations and airports.

The place where the projected image is projected can be appropriately set according to the application, such as not only the floor surface but also the wall surface and ceiling surface.

In addition, the specifications (shape, size, layout, etc.) of the light source unit, the main body unit, and other details can be changed as appropriate.

10 Lighting system 200 1st lighting device 300 2nd lighting device 351a Projected image 410 Storage unit 420 Calculation unit 430 Control unit 440 Measurement unit 450 Required contrast ratio 460 Measurement contrast ratio 470 Bright / dark fluctuation Environmental lighting Light source unit Output value 480 Dimming Base illumination Light source output value L1 Illumination light L2 Projected light R Predetermined area

Claims (3)

The first lighting device that irradiates the illumination light to illuminate the surrounding space,
A second lighting device that projects projected light for projecting a preset projected image onto a predetermined area, and
A measuring unit that acquires measurement contrast ratio data of a projected image projected on the predetermined area, and a measuring unit.
A storage unit that stores data on the required contrast ratio of a preset projected image,
An arithmetic unit that compares the measured contrast ratio data with the required contrast ratio data,
A control unit that controls the measured contrast ratio to be equal to or higher than the required contrast ratio when the measured contrast ratio is lower than the required contrast ratio.
A lighting system characterized by being equipped with. The first aspect of claim 1, wherein the control unit controls the output value of the light source unit of the second lighting device to be higher when the measured contrast ratio is lower than the required contrast ratio. Lighting system. 1 or claim 1, wherein the control unit controls so that the output value of the light source unit of the first lighting device becomes low when the measured contrast ratio is lower than the required contrast ratio. 2. The lighting system according to 2.