JP2019114498A - Lighting device, method for controlling lighting device and data structure - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an illuminating device capable of artificially reproducing a color of a sky which differs depending on a region, a time zone, weather and the like and a sense of depth similar to a natural sky. An illumination device is a light source that emits visible light, and one or more light sources that can adjust the color or illuminance of visible light, and light that scatters at least a portion of the visible light emitted from the light source. And a color temperature of visible light is 2000 K or more and 25000 K or less, the first particles are arranged inside the light diffuser, and the diameter of the first particles is 50 nm or more and 250 nm or less. [Selection diagram] Figure 1

Description

  The present invention relates to a lighting device, a control method of the lighting device, and a data structure.

  A lighting system that reproduces natural light such as sunlight and the sky is known. This illumination system adjusts the light emitted from a white light emitting diode (LED) to a wavelength close to sunlight, scatters and transmits the light emitted from the LED, and thus light like sunlight or Create a sky of various colors. By using the lighting system in a closed environment, it is possible to give the user in the closed environment visual comfort.

  For an illumination system that reproduces natural light or sky, the first light source emitting a beam of visible light and the inner and outer surfaces receiving the beam of visible light are bounded and at least partially transparent to the beam of visible light An illumination system is known that includes various diffuse light generators (see, for example, Patent Document 1).

Japanese Patent Application Publication No. 2016-514340

  The lighting system described above allows the user to perceive the same situation as when the sun illuminates the room through the window. However, in the illumination system described above, the color of visible light emitted from the first light source and the state of the diffused light generator are fixed, for example, sky color or natural sky according to different areas, time zones, weather, etc. There was a problem that it was difficult to give the same sense of depth.

  The present invention has been made to solve the above problems, and an object of the present invention is to provide a lighting device capable of artificially reproducing various natural skies.

  One aspect of the present invention for solving the above problems is one or more light sources emitting visible light, the light source being capable of adjusting the color or the illuminance of the visible light, and the visible light emitted from the light source A light diffuser that scatters at least a portion, the color temperature of the visible light is 2000 K or more and 25000 K or less, a first particle is disposed inside the light diffuser, and a diameter of the first particle Is a lighting device of 50 nm or more and 250 nm or less.

  According to the embodiments of the present invention, it is possible to provide a lighting device capable of artificially reproducing various natural sky, a control method of the lighting device, and a data structure.

It is the schematic which shows an example of the illuminating device of 1st Embodiment. It is a side view which shows a mode that visible light scatters and permeate | transmits in the illuminating device shown in FIG. It is the schematic which shows the memory | storage part and control part of an illuminating device shown in FIG. It is an example of spectrum information of a fictional city. This is another example different from FIG. 4 of spectrum information of an imaginary city. It is the schematic which shows the selection part of the illuminating device shown in FIG. It is a flowchart which shows the control method of the illuminating device shown in FIG. It is the schematic which shows an example of the illuminating device of 2nd Embodiment. It is the schematic which shows an example of the illuminating device of 3rd Embodiment.

Next, a lighting apparatus according to an embodiment will be described with reference to the drawings. The embodiments described below are merely examples, and the embodiments to which the present invention is applied are not limited to the following embodiments.
In all the drawings for describing the embodiment, the same reference numerals are used for components having the same function, and the repeated description is omitted.

First Embodiment
[Lighting device]
FIG. 1: is schematic which shows an example of the illuminating device of 1st Embodiment which concerns on this invention. The illumination device 100 of the present embodiment artificially reproduces the sky toward the irradiation target space such as the room 30. In the example shown in FIG. 1, the lighting device 100 is installed on the ceiling or wall of the room 30, and illuminates the room from the ceiling or from the wall.

  The lighting device 100 includes at least a light source 110 and a light diffuser 145. The lighting apparatus 100 may further include a lens 165, an inner cover 180, a housing 170, a storage unit 162, a control unit 160, a reception unit 150, a selection unit 161, and an input device 210.

  The housing 170 is installed on the ceiling or wall of the room 30. The present embodiment will be described on the assumption that the housing 170 is installed on a ceiling surface. In addition, also when installing the housing | casing 170 on a wall surface, it can be assumed. The light source 110, the lens 165, the inner cover 180, the light diffuser 145, the control unit 160, the storage unit 162, and the input device 210 are housed in a housing 170, and are held at predetermined positions by the housing 170. Be supported.

  An opening 171 is formed in the bottom of the housing 170. The light diffuser 145 has an entrance surface 145 a and an exit surface 145 b. At least a portion of the exit surface 145 b of the light diffuser 145 is exposed to the opening 171. The outer peripheral edge of the light diffuser 145 is placed on the bottom of the housing 170 around the opening 171. The shape of the opening 171 may be rectangular or circular. The illumination device 100 artificially reproduces the sky by visible light emitted from the light source 110, passing through the light diffuser 145, and exiting from the opening 171. In the present specification, “visible light” refers to an electromagnetic wave having a wavelength of at least 380 nm or more and 780 nm or less, preferably 400 nm or more and 720 nm or less. Further, “visible blue light” refers to visible light having a wavelength of 450 nm or more and 495 nm or less within the wavelength range.

  Hereinafter, two directions parallel to the ground surface and orthogonal to each other will be referred to as an X axis and a Y axis. Further, the vertical direction perpendicular to the X axis and the Y axis is taken as the Z axis.

 The light source 110 emits visible light having a color temperature of at least 2000K and up to 25000K. The light source 110 is configured to be able to adjust the color and illuminance of visible light emitted. The light source 110 is configured of, for example, a color synthesized LED or a liquid crystal projector (for example, a xenon lamp or a halogen lamp). The color-combined LED is a prism, a light guide, a lens, a dichroic mirror, and light emitted from a single-color wavelength LED such as red (R), green (G), blue (B), and other colors having specific wavelengths. And the like are emitted after synthesis, and the light diffuser 145 is irradiated with visible light whose color and illuminance are adjusted. A liquid crystal projector (such as a xenon lamp or a halogen lamp) can irradiate the light diffuser 145 with visible light whose color and illuminance are adjusted by changing the projection pattern, and therefore, it can be along the incident surface 145a and the emission surface 145b. It is possible to emit light of different color and illuminance for each area.

  The light source 110 is provided inside the housing 170 and at a position where visible light can be emitted to the light diffuser 145. In the present embodiment, the light source 110 is disposed above the light diffuser 145. A lens 165 is disposed between the light source 110 and the light diffuser 145. An inner cover 180 encloses between the lens 165 and the light diffuser 145. Specifically, openings 181 and 182 are formed on the top and bottom surfaces of the inner cover 180, respectively. The lens 165 is fitted into the opening 181, and the light diffuser 145 is fitted into the opening 182.

  The lens 165 is provided for the purpose of expanding the visible light emitted from the light source 110 so as to uniformly irradiate the light diffuser 145. The lens 165 is not particularly limited as long as it satisfies the purpose, and includes a convex lens, an aspheric lens, a combination lens, a prism, a light guide, and the like.

  The inner surface of the inner cover 180 is painted with a blue paint to reflect only visible blue light, or is made of a blue material. As a result, inside the inner cover 180, visible light of colors other than blue is appropriately absorbed. That is, the inside of the inner cover 180 which forms at least a part of the inside of the housing 170 is blue. Note that the inner wall surface of the housing 170 may be painted blue. Alternatively, the inner wall surface of the housing 170 is made of a paint or material that absorbs light. Note that the color of the inner wall surface of the housing 170 may be black.

  The light diffuser 145 has a predetermined thickness and is formed in a plate shape. In the present embodiment, the light diffuser 145 is a solid made of resin, and includes particles (first particles) 251 and particles (second particles) 252 dispersed in the resin.

  When the light emitted from the light source 110 is emitted through the opening 171, the light beam hits the light diffuser 145, and the blue (empty) color scattering of Rayleigh scattering that occurs in the light diffuser 145 and the light beam transmitting the light diffuser 145 By means of (sunlight), it is possible to obtain a balance close to the actual appearance of the sky and the sun. Moreover, it is preferable that the average particle diameter of resin which comprises the light diffusing body 145 is 50 nm or more and 250 nm or less. By satisfying the range, when the visible light emitted from the light source 110 is scattered as will be described later, the scattered light is emitted toward the room 30 and the non-scattered light as sunlight is transmitted. It can be done.

  The resin constituting the light diffuser 145 is, for example, a thermoplastic resin, a thermosetting resin, a photocurable resin, an acrylic resin, an epoxy resin, an epoxy resin, a polyester resin, a polystyrene resin, a polyolefin resin, a polyamide resin, a polyimide resin, a polyvinyl resin, Butyral resin, fluorocarbon resin, vinyl acetate resin, silicone resin, acrylic styrene resin or polycarbonate, liquid crystal polymer, polyphenylene ether, polysulfone, polyether sulfone, polyarylate, plastics such as amorphous polyolefin, or those Or a mixture or copolymer of

  FIG. 2 is an enlarged side view of a part of the lighting device 100 shown in FIG. 2, illustration of the lens 165 and each of the resin which comprises the light diffusing body 145 is abbreviate | omitted, and a mode that the visible light emitted from the light source 110 scatters or permeate | transmits is shown.

  The plurality of first particles 251 are dispersed and embedded in the inside of the light diffuser 145 (that is, in the resin constituting the light diffuser 145) in order to Rayleigh-scatter visible light. The diameter of the first particle 251 is in the range of 50 nm or more and 250 nm or less. By satisfying the above range, most of the blue visible light emitted from the light source 110 can be scattered by Rayleigh scattering, and the sky can be deepened in the sky reproduced by the lighting device 100. The concentration of the first particles 251 with respect to the resin constituting the light diffuser 145 is preferably, for example, 1 ppm or more and 300 ppm or less. The concentration is appropriately changed depending on the diameter of the first particle 251 and the size of the light diffuser 145 in the Z direction. By satisfying the above range, the blueness of the sky reproduced by the lighting device 100 can be appropriately deepened.

The first particles 251 have a refractive index different from that of the resin constituting the light diffuser 145. The first particles 251 are, for example, inorganic oxides such as ZnO, TiO ₂ , ZrO ₂ , SiO ₂ , and Al ₂ O ₃ .
The refractive index of the first particles 251 is preferably 2.0 or more and 3.0 or less.

  The second particles 252 are embedded inside the light diffuser 145 to Mie scatter visible light. The diameter of the second particles 252 is in the range of 250 nm to 10 μm. By filling the range, all colors contained in visible light emitted from the light source 110 are scattered in the same manner by Mie scattering, and white light in the sky reproduced by the lighting device 100, light emitted from the light source 110 You can add the color of itself. The concentration of the second particles 252 with respect to the resin constituting the light diffuser 145 is set lower than the concentration of the first particles 251 with respect to the resin. The concentration is appropriately changed depending on the diameter of the second particles 252 and the size of the light diffuser 145 in the Z direction. The whiteness that adds the color of the light itself emitted from the light source 110 when changing the color of the light emitted from the light source 110 while including the blueness of the sky reproduced by the lighting device 100 by satisfying the above range Can be added moderately. For example, by changing the color of light emitted from the light source 110 to be reddish, the blue sky becomes moderately light purple (that is, the violet wavelength (380 nm to 450 nm wavelength) component is not increased) , That is to be seen as mixed purple in the human eye).

  The refractive index of the second particle 252 may be the same as or different from the refractive index of the resin constituting the light diffuser 145 and the first particle 251.

  The housing 170 blocks natural light and artificial illumination light incident on the light diffuser 145 from the outside. Note that the ceiling of the room 30 is shielded by the outer wall of the building or the like, and when it is in a dark place, the ceiling itself may be used as the housing 170. In this case, the housing 170 may be a frame.

  The control unit 160 and the storage unit 162 are provided at an arbitrary position inside the side surface of the housing 170. The receiving unit 150 and the selecting unit 161 are provided inside the side of the room 30 at a position where the user U can reach.

  The light source 110 and the control unit 160 are connected by a control line 114. The receiving unit 150 is attached to the selecting unit 161. The control unit 160 and the storage unit 162 are integrally provided and connected to each other. The storage unit 162 and the selection unit 161 are connected by a control line 124.

  The storage unit 162 is a so-called memory. As shown in FIG. 3, data measured in advance using a spectroscope or the like for the spectrum of visible light that comes from the sky in a desired area or time zone is stored in the storage unit 162. FIG. 4 is an example of a spectrum (spectral information) of visible light of an imaginary city (a city A). FIG. 5 is an example of the spectrum (spectral information) of visible light of fictional city B in a region different from city A. The relative intensity on the vertical axis of the spectrum shown in FIGS. 4 and 5 represents the relative intensity when the largest intensity in the entire wavelength range of visible light is 1. As illustrated in FIG. 4 and FIG. 5, in the cities in different regions, the presence or absence of the blue intensity or the distribution of, for example, green (wavelength near 555 nm) other than blue is different.

  The storage unit 162 displays sky patterns for each of spring, summer, autumn, and winter seasons and areas (for example, the sky in Japan) measured in advance as sky spectrum information corresponding to various buttons included in the selection unit 161 described later. Predetermined spectral information for each time zone such as dawn, morning, noon, dusk, and night are stored in association with each other (blue sky of Mediterranean Sea, blue sky of Northern Europe) (see FIG. 3).

  The control unit 160 refers to any of the plurality of spectrum information stored in the storage unit 162 to generate a color illuminance control signal for controlling the color or illuminance of the light source 110, and generates the generated color illuminance control signal. Transmit to the light source 110. In order to exert such a function, as shown in FIG. 3, the control unit 160 includes, for example, an input receiving unit 166A, a data reading unit 166B, and a converting unit 166C. The input receiving unit 166A receives an input from the user U, and outputs the input information on the area and the time zone to the data reading unit 166B. The data reading unit 166B reads the data of the spectrum information from the input region and time zone information from the storage unit 162, and outputs the data to the converting unit 166C. The conversion unit 166C converts the input spectrum information into a color illuminance control signal, and transmits the color illuminance control signal to the light source 110. The control unit 160 functions as described above, and is an electronic circuit or the like capable of transmitting a color illuminance control signal to the light source 110 and turning on or off the light source 110. The control unit 160 may be a hardware processor that executes a program.

The visible light spectrum stored in the storage unit 162 may be data itself obtained by measuring the visible light spectrum coming from the sky in advance using a spectroscope or the like, but the spectrum measured at various locations may be artificially The data may be converted to a spectrum (or control information) in the case of reproduction by the light diffuser 145 as
Further, the control unit 160 and the recording unit 162 may be disposed outside the apparatus. In that case, the control unit 160 arranges only the conversion unit 166C inside.

  The receiving unit 150 receives a user control signal transmitted by a remote controller 250 described later or an arbitrary communication operation device. The receiver 150 includes an antenna capable of receiving a user control signal, a receiver, and the like. The user control signal received by the receiving unit 150 is output to the control unit 160 via the control line 124.

  The selection unit 161 is used when the user U who is in the room 30 selects an empty pattern that the lighting device 100 wants to reproduce. As shown in FIG. 6, the selection unit 161 of the present embodiment includes an ON button 305 and an OFF button 306, an area selection area 301, and a time zone selection area 302. The area selection area 301 includes a Japanese sky button 312, a spring button 314, a summer button 316, an autumn button 318, a winter button 320, a Mediterranean blue sky button 322, and a Scandinavian blue sky button 324. The time zone selection area 302 includes a dawn button 332, a morning button 334, a noon button 336, a dusk button 338, and a night button 340. The selection unit 161 includes an electronic circuit including a control line that connects various buttons and the control line 124.

[Example of lighting by lighting device]
The color illuminance control signal includes a color control signal of visible light emitted from the light source 110 and an illuminance control signal. The control unit 160 calculates the brightness of each color of RGB based on the color control signal and the illuminance control signal for each of a plurality of pixels of the liquid crystal projector, and adjusts the light source 110 for each pixel according to the calculated brightness of each color of RGB. Turn on or off.

  The light source 110 may include a white LED combined with color as well as the liquid crystal projector as described in the preceding stage. The control unit 160 can control the illuminance of visible light using the color synthesized LED. The control unit 160 adjusts the current or voltage supplied to the LED of each of the monochromatic wavelengths of R, G, and B and the monochromatic wavelength of the other unique wavelength characteristics based on the illuminance control signal, and performs color synthesis Turn on or off the LED.

  The control unit 160 generates a color control signal and an illuminance control signal of visible light based on the information output from the storage unit 162, the selection unit 161, the sensor 200, the input device 210, and the weather information acquisition unit 220. Output.

  The control unit 160 refers to the empty spectrum information stored in the storage unit 162 according to the content selected by the user U by the selection unit 161, and supplies the image signal sent to the liquid crystal projector or the current or voltage supplied to the color synthesized LED To the light source 110. This reflects the region selected by user U; Japanese sky (spring, summer, autumn, winter), Mediterranean blue sky, Nordic blue sky, and time zone; dawn, morning, noon, dusk, night spectrum The sky is reproduced by the light diffuser 145.

  In addition, the storage unit 162 preferably stores gradation information in which at least one of color and illuminance changes along the exit surface (empty display surface) 145 b of the light diffuser 145. As the gradation information, for example, a pattern in which only the illuminance of blue visible light decreases as going from the front side to the back side in the Y direction on the emission surface 145b, or as it proceeds from the back side to the front in the Y direction on the emission surface 145b There is a pattern in which the illuminance of blue visible light decreases and the illuminance of red visible light increases. The control unit 160 reads the data of the gradation information from the storage unit 162 automatically or according to the information selected by the user U with the remote controller 250 or the like. The control unit 160 transmits to the light source 110 the current or voltage supplied to the image signal sent to the liquid crystal projector reflecting the gradation information or the color-combined LED. As a result, the light diffuser 145 reproduces the sky in which at least one of color and illuminance changes along the exit surface 145 b.

[Method of controlling lighting device]
Next, a control method of the lighting device 100 will be described.

  As shown in FIG. 7, first, the spectrum of light coming from the sky in different areas is measured (step S401). Next, the measured spectral information of visible light coming from the sky is stored in the storage unit 162 (step S402). Subsequently, based on the spectrum information of the visible light stored in the storage unit 162, a color illuminance control signal to be output to the light source 110 of the lighting device 1 is generated (step S403). Thereafter, the color illuminance control signal generated in step S403 is output to the light source 110 (step S404).

  In the control method described above, after the user U presses the ON button 305 of the selection unit 161, the user U presses any button of the area selection area 301 and the time zone selection area 302, or the user U uses the remote controller 210. Information on the area and the time zone is input to the input receiving unit 166A of the control unit 160 by an operation such as inputting the area and the time zone. As described above, the control unit 160 generates a color illuminance control signal in accordance with the input area and time zone, and transmits the color illuminance control signal to the light source 110. By transmitting a color illuminance control signal to the light source 110, the sky corresponding to the input area and time zone is reproduced in the light diffuser 145.

  The lighting apparatus 100 according to the first embodiment described above is a light source for emitting visible light, and has a light source 110 capable of adjusting the color or illuminance of visible light, and a total light transmittance of 70% or more. , And a light diffuser 145 for scattering at least a part of visible light emitted from the light source 110, wherein the color temperature of the visible light is 2000 K or more and 25000 K or less, and the first particles 251 inside the light diffuser 145. And the diameter of the first particle 251 is 50 nm or more and 250 nm or less. According to the lighting device 100, the color and illuminance of visible light emitted from the light source 110 can be adjusted by the control unit 160. This changes the color and illuminance of visible light transmitted through the light diffuser 145, and also changes the amount of scattered light Rayleigh-scattered by the first particles 251, so that the standard that can be reproduced only with blue visible light Not only the blue sky, but also a colorful blue sky such as a white blue sky or a sepia blue sky, a sky with gradation from red to dark blue like dusk, a twilight sky, etc. can be reproduced. By expanding the expression of the sky that can be reproduced, for example, it is possible to reproduce the color of the sky according to different areas, time zones, weather and the like. As shown in FIG. 2, by making visible light which is transmitted through the light diffuser 145 and the scattered light which is Rayleigh-scattered by the first particles 251 visible from the room 30, non-uniform lightness and the like in the sky color etc. Born and can express the same sense of depth as natural sky.

  Further, according to the illumination device 100 of the first embodiment, the visible light L1 passing through the light diffuser 145 further includes the second particles 252 inside the light diffuser 145, as shown in FIG. Of the scattered light L2 that is Rayleigh-scattered by the particles 251 and the second particle 252 allow a complex sky pattern to be viewed by making the overall color mixture of general scattered or Mie-scattered light L3 visible from the room 30. It reproduces and can effectively express the same sense of depth as natural sky.

  Moreover, according to the illuminating device 100 of 1st Embodiment, the sky of the desired area | region and time slot | zone which the user U selected can be reproduced to the light diffuser 145. FIG.

Second Embodiment
Next, a lighting device of a second embodiment will be described.

[Lighting device]
Although not shown, the illumination device of the second embodiment has the same configuration as the illumination device 100 of the first embodiment, and further includes sensors 200A, 200B, 200C,.

  As shown in FIG. 8, the sensors 200A, 200B, and 200C can detect the color, the illuminance, the temperature, and the humidity of the sunlight of the external environment, and are provided at an arbitrary position outdoors. The information detected by the sensors 200A, 200B, and 200C is acquired via a network. The control unit 160 generates a color illuminance control signal (a color illuminance control signal for controlling color or illuminance) in the light source 110 based on the color, illuminance, temperature, and humidity of sunlight acquired via the network. Specifically, the information detected by the sensors 200A, 200B, and 200C is input to the control unit 160 via the server 230. The control unit 160 transmits the generated color illuminance control signal to the light source 110.

  The input device 210 can input information specifying a region and a time zone. The control unit 160 detects the color of the light source 110 based on the information detected by the sensors 200A, 200B, and 200C and acquired through the network and matching the area and time zone input through the input device 210. An illumination control signal (color illumination control signal for controlling color or illumination) is generated. The control unit 160 transmits the generated color illuminance control signal to the light source 110.

[Example of lighting by lighting device]
The control unit 160 controls the color illuminance control signal in consideration of, for example, bluish whiteness and whiteness of the sky and reddishness such as sunset based on the information on the weather detected at any timing by any of the sensors 200A, 200B and 200C. Generate For example, when the illuminance of sunlight emitted to the sensor 200A decreases and the sensor 200A detects a decrease in illuminance, the control unit 160 generates a color illuminance control signal in which the bluish color is weak and the white color is strong. The control unit 160 reduces the current or voltage supplied to the lighting portion B of each of the partial or entire pixels of the liquid crystal projector and increases the current or voltage supplied to the color synthesized LED. By adjusting the current or voltage described above by the control unit 160, the illuminance of the blue light which is Rayleigh-scattered on the first particle 251 in the light diffuser 145 is reduced, and the second particle 252 is hit for general scattering or The illumination of all colors of visible light scattered is increased. Therefore, the light scatterer 145 becomes white with non-uniformity close to nature, and a white cloudy sky is reproduced in the light diffuser 145 and is illuminated in the room 30.

  Based on the area and the time zone received from the input device 210, the control unit 160 reads from the storage unit 162 spectral information of visible light that matches the area and the time zone, and generates a color illuminance control signal. The control unit 160 adjusts the current and voltage supplied to the lighting portion of RGB of each pixel of the liquid crystal projector and the color synthesized LED, reproduces the sky based on the time information in the light diffuser 145, and illuminates the room 30. .

  For example, when the dusk time in Tokyo (for example, 17:30) is input from the input device 210, the control unit 160 generates a color illuminance control signal in which redness is strong and bluishness is weak. The control unit 160 sends the color illuminance control signal to the liquid crystal projector, or reduces the current or voltage of the blue component supplied to the color synthesized LED, and increases the current or voltage of the red component. By adjusting the current and voltage described above by the control unit 160, the illuminance of the blue light, which is Rayleigh scattered by the first particles 251 in the light diffuser 145, decreases, and the red light transmitted from the incident surface 145a to the output surface 145b The light intensifies and strikes the second particles 252, increasing the red illumination of general scattered and Mie scattered visible light. Therefore, the light-scattering body 145 has redness and bluishness with non-uniformity close to nature, and the dusk sky is reproduced in the light-diffusing body 145 and is illuminated in the room 30.

  The control unit 160 refers to the storage unit 162, calculates the sky color and illuminance estimated from the regional weather information detected at an arbitrary timing by the weather information acquisition unit 220, and responds to the calculated sky color and illuminance. The color illuminance control signal is output to the light source 110.

  For example, while reproducing the blue sky of Beijing with the lighting device 100, when the sensor 200B acquires information that is cloudy in Beijing, the control unit 160 generates a color illuminance control signal in which the bluishness and the whiteness are both weak. The control unit 160 sends the color illuminance control signal to the liquid crystal projector or reduces the current or voltage supplied to the color synthesized LED. By adjusting the current and voltage described above by the control unit 160, the illuminance of the blue light which is Rayleigh-scattered on the first particle 251 in the light diffuser 145 is reduced, and is hit on the second particle 252 in general scattering or Mie scattering The illumination of all colors of visible light also decreases. Therefore, the light scatterer 145 becomes somewhat dim, and the cloudy sky is reproduced in the light diffuser 145.

[Method of controlling lighting device]
The control method of the lighting device of the second embodiment is the same as the control method of the lighting device 100, and the description of the detailed steps is omitted (see FIG. 7).

  In the control method described above, the control unit 160 generates a color illuminance control signal in accordance with the area and time zone input from the sensors 200A, 200B, and 200C via the network, and transmits the color illuminance control signal to the light source 110. By transmitting a color illuminance control signal to the light source 110, the sky corresponding to the input area and time zone is reproduced in the light diffuser 145.

  The illumination device according to the second embodiment described above is a light source that emits visible light as in the illumination device 100 according to the first embodiment, and the light source 110 capable of adjusting the color or illuminance of the visible light A light diffuser 145 for scattering at least a part of the emitted visible light, the color temperature of the visible light is 2000 K or more and 25000 K or less, and the first particle 251 is disposed inside the light diffuser 145; The diameter of the first particle 251 is 50 nm or more and 250 nm or less. The color and illuminance of visible light emitted from the light source 110 can be adjusted by the controller 160. According to the illumination device of the second embodiment, the color and the illuminance of visible light transmitted through the light diffuser 145 are changed, and the amount of scattered light which is Rayleigh-scattered by the first particles 251 is changed to reproduce various sky. can do. By expanding the expression of the sky that can be reproduced, for example, it is possible to reproduce the color of the sky according to different areas, time zones, weather and the like. In addition, uneven colors and the like are generated in the color of the sky, and a sense of depth similar to that of natural sky can be expressed.

  Further, according to the illumination device of the second embodiment, the visible light L1 passing through the light diffuser 145 further includes the second particle 252 inside the light diffuser 145, and as shown in FIG. A complex sky pattern can be reproduced by making the color mixture of the scattered light L2 that is Rayleigh-scattered by the particle 251 and the scattered light L3 that is Mie-scattered by the second particle 252 visible from the room 30, and a natural sky Similar sense of depth can be effectively expressed.

  Further, according to the lighting device 100 of the second embodiment, the light diffuser 145 reproduces the sky of the desired area and time zone based on the information on the weather detected at any timing by the sensors 200A, 200B, 200C. can do.

Third Embodiment
Then, the illuminating device of 3rd Embodiment is demonstrated.

[Lighting device]
As shown in FIG. 9, the lighting device of the third embodiment has the same configuration as the lighting device 100 of the first embodiment, and further includes a light source 111. That is, the illumination device of the third embodiment includes the plurality of light sources 110 and 111. The light source 111 emits visible light along the X direction, and illuminates the side surface 145 c formed along the Z direction (plate thickness direction) of the light diffuser 145. The light source 111 is, for example, an LED of a predetermined color, and is an auxiliary light source that emits visible light of a color desired to be enhanced in the sky reproduced by the lighting device 100. The light source 111 and the control unit 160 are connected by a control line (not shown) similar to the control line 114.

  In the lighting device of the third embodiment, in addition to the same behavior as the lighting device 100 of the first embodiment, the visible light emitted from the light source 111 is incident on the light diffuser 145 from the side surface 145c. Mie scattering occurs by the second particles 252 of the By this, the color contained in the visible light emitted from the light source 111 is scattered by Mie scattering, and the color of the light itself emitted from the light source 111 is further added to the sky reproduced by the lighting device of the third embodiment. it can.

[Example of lighting by lighting device]
For example, by using an LED that emits blue visible light as the light source 111, it is possible to intensify the blueness of the sky reproduced by the lighting device of the third embodiment.

[Method of controlling lighting device]
The control method of the lighting device of the third embodiment is the same as the control method of the lighting device 100, and the description of the detailed steps is omitted (see FIG. 7). However, in step S403, based on the spectrum information of the visible light stored in the storage unit 162, a color illuminance control signal to be output to the light source 110 of the lighting device is generated and a color illuminance control signal to be output to the light source 111 is generated. Do. In step S404, the color illuminance control signal generated in step S403 is output to the light sources 110 and 111.

  In addition to the light sources 110 and 111, the lighting device of the third embodiment may include another light source. At least one of the plurality of light sources provided in the lighting device of the third embodiment may illuminate the side surface 145 c of the light diffuser 145.

  Although the preferred embodiments of the present invention have been described above in detail, the present invention is not limited to the specific embodiments, and various modifications may be made within the scope of the present invention as set forth in the appended claims. Changes are possible.

For example, although light is directly emitted downward from the light source 110 in the ceiling in FIG. 1, the light emitted from the light source 110 may be directed in a direction other than downward. In that case, the light emitted from the light source 110 may be reflected by a mirror or the like and irradiated to the light diffuser 145.
In addition, if the ceiling is configured to shield incident light from the outside, the housing 170 may be omitted, and the light source 110, the light diffuser 145, the lens 165, and the like may be individually disposed in the ceiling. .
Furthermore, the control unit 160 is provided at an arbitrary location as long as it can output a color illuminance control signal to the light source 110. The light source 110 and the control unit 160 may be connected to each other by a wired control line 114, and may communicate with each other wirelessly.

DESCRIPTION OF SYMBOLS 100 ... Illuminator, 110, 111 ... Light source, 145 ... Light diffuser, 160 ... Control part, 162 ... Storage part, 170 ... Housing | casing, 251 ... 1st particle | grain, 252 ... 2nd particle | grain

Claims (13)

One or more light sources emitting visible light, wherein the light source is capable of adjusting the color or illuminance of the visible light;
A light diffuser that scatters at least a portion of the visible light emitted from the light source;
Equipped with
The color temperature of the visible light is 2000 K or more and 25000 K or less,
First particles are disposed inside the light diffuser,
The diameter of the first particle is 50 nm or more and 250 nm or less.
Lighting device. Second particles are disposed inside the light diffuser,
The diameter of the second particle is 250 nm or more and 10 μm or less.
The lighting device according to claim 1. The concentration of the first particles inside the light diffuser is 1 ppm or more and 300 ppm or less,
The concentration of the second particles inside the light diffuser is lower than the concentration of the first particles,
The lighting device according to claim 2. The light diffuser has a predetermined thickness and is formed in a plate shape.
A plurality of the light sources are provided, and at least one of the plurality of light sources irradiates a side surface formed along a thickness direction of the light diffuser.
The illuminating device of Claim 2 or Claim 3. A housing in which the light source and the light diffuser are housed;
At least a portion of the interior of the housing is blue or black,
The lighting device according to any one of claims 1 to 3. A storage unit in which a plurality of spectral information of visible light coming from the sky are stored;
A control unit that generates a color illuminance control signal for controlling a color or illuminance of the light source with reference to any of the plurality of spectrum information, and transmits the generated color illuminance control signal to the light source Prepare,
The lighting installation according to any one of claims 1 to 5. The plurality of spectrum information includes a plurality of spectrum information based on results respectively measured in different areas.
The lighting device according to claim 6. The plurality of spectral information includes a plurality of spectral information based on results measured at different time zones,
The illuminating device of Claim 6 or Claim 7. The light source is adjustable in color or illumination according to the spectral distribution of the visible light,
A storage unit storing gradation information in which at least one of color and illuminance changes along an empty display surface of the light diffuser;
A control unit that generates the color illuminance control signal based on the gradation information stored in the storage unit and outputs the generated color illuminance control signal to the light source.
The lighting device according to any one of claims 1 to 8. Information detected by a sensor capable of detecting the color, illuminance, temperature, and humidity of the external environment is acquired through the network, and the information is acquired based on the color, illuminance, temperature, and humidity of the acquired sunlight. The controller further includes a control unit that generates a color illuminance control signal for controlling color or illuminance of the light source and transmits the generated color illuminance control signal to the light source.
The illuminating device as described in any one of Claims 1-9. It has an input device that can input information that specifies the area and time zone,
The controller controls the color or illuminance of the light source based on the information detected by the sensor and acquired through the network, the information matching the area and the time zone input through the input device. Generate a color illumination control signal to control the
The lighting device according to claim 10. Measure the spectrum of light coming from the sky in different areas,
Storing the measured spectral information of visible light coming from the sky in the storage unit;
The light source scatters at least a part of the visible light emitted from the light source and one or more light sources capable of adjusting the color or the illuminance of the visible light emitted based on the spectrum information of the visible light stored in the storage unit A light diffuser, wherein a color temperature of the visible light emitted from the light source is 2000 K or more and 25000 K or less, a first particle is disposed inside the light diffuser, and a diameter of the first particle is Generating a color illuminance control signal to be output to a lighting device having a wavelength of 50 nm or more and 250 nm or less, and outputting it to the light source
Lighting device control method. The spectrum of light coming from the sky, measured in different areas, scatters at least a part of the visible light emitted from the light source and one or more light sources capable of adjusting the color or illuminance of the visible light emitted A light diffuser, wherein a color temperature of the visible light emitted from the light source is 2000 K or more and 25000 K or less, a first particle is disposed inside the light diffuser, and a diameter of the first particle is Including information converted into a color illuminance control signal to be output to a lighting device having a wavelength of 50 nm or more and 250 nm or less,
data structure.

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