JP2021027016A - Illumination control system - Google Patents

Abstract

To more effectively give to a user a feeling of fluctuation caused by color tone change in a space in which light is superposed.SOLUTION: An illumination control system comprises: a first illumination apparatus for irradiating a first region; a second illumination apparatus for irradiating a second region; and a controller for controlling the first illumination apparatus and the second illumination apparatus. The controller comprises: a control signal generator for generating a first control signal for controlling the first illumination apparatus and a second control signal for controlling the second illumination apparatus; and a driver for controlling illumination of the first illumination apparatus on the basis of the first control signal and controlling illumination of the second illumination apparatus on the basis of the second control signal. At least a part of the second region overlaps with the first region. The first region is wider than the second region. A time width of step variation in brightness or excitation purity of the first illumination apparatus is larger than a time width of step variation in brightness or excitation purity of the second illumination apparatus. The brightness of the first illumination apparatus is lower than the maximum brightness in one cycle of brightness variation of the second illumination apparatus.SELECTED DRAWING: Figure 1A

Description

The present disclosure relates to a lighting control system that changes the light emitted by a lighting device.

Patent Documents 1 to 4 describe lighting devices that change the brightness of illumination light at a frequency close to the respiratory rhythm. Based on the change in the brightness of the illumination light, the user can adjust the rhythm of breathing and relax.

Japanese Patent No. 4142944 Japanese Patent No. 4237997 Japanese Patent No. 3978334 Japanese Patent No. 4215001

For example, in order to utilize a slow light color change (for example, about 0.08 Hz) for deep breathing, a control method considering human chromatic adaptation is required. Further, when the brightness of the illumination light is changed by using two or more lighting devices in the space where the user is present, the irradiation areas may overlap. In such a case, it is difficult to effectively give the user a sense of fluctuation due to a change in color tone between chromatic light and achromatic color unless appropriate control is performed between two or more lighting devices. The inventors have noticed.

According to the present disclosure, in certain embodiments, a first luminaire that illuminates a first region, a second luminaire that illuminates a second region, and a controller that controls the first luminaire and the second luminaire. A lighting control system including the above is provided, in which the controller generates a first control signal for controlling the first lighting device, a second control signal for controlling the second lighting device, and a control signal generator. A drive that controls the irradiation of the first lighting device based on the first control signal and controls the irradiation of the second lighting device based on the second control signal is provided, and at least a part of the second region. Overlaps the first region, the first region is wider than the second region, and the time width of the step change of the brightness or stimulation purity of the first lighting device is the brightness or stimulation purity of the second lighting device. The brightness of the first lighting device is larger than the time width of the step change of, and is smaller than the maximum brightness in one cycle of the brightness change of the second lighting device.

It is possible to provide a lighting control system that more effectively gives the user a sense of fluctuation due to the above-mentioned color tone change in a space where light is superimposed.

It is a block diagram of a lighting device. It is a figure which shows the realization example of the lighting equipment in space. It is a figure which shows the path which is the locus of the moving point of the total light of a lighting device. It is a graph which shows the plot which shows the change of the stimulation purity (vertical axis) of the total light of the lighting equipment with respect to time (horizontal axis). It is a graph which shows the plot which shows the change of the stimulation purity (vertical axis) of the total light of the lighting equipment with respect to time (horizontal axis). It is a graph which shows the plot which shows the change of the stimulation purity (vertical axis) of the total light of the lighting equipment with respect to time (horizontal axis). It is a graph which shows the plot which shows the change of the stimulation purity (vertical axis) of the total light of the lighting equipment with respect to time (horizontal axis). It is a figure which shows the time characteristic of the time-dependent color discrimination. It is a figure which shows the change of the discrimination threshold number with respect to time for the color of a different wavelength. It is a figure which shows the change of the luminance difference discrimination threshold with respect to the fovea adaptation brightness. It is a figure which shows the color discrimination ellipse of MacAdam. It is a figure which shows the preferable relationship about the hue and the stimulus purity of the lighting equipment which is a "ground" (background), and the lighting equipment which is a "figure" (accent). It is a figure which shows the chromaticity change of the total light which changes between the 1st light and the 2nd light. It is a figure which shows the path which is the locus of the moving point obtained by the stimulus purity of total light, the brightness of total light, and the stimulus purity and brightness of total light as an ordered pair. It is a figure which shows the path which is the locus of the moving point obtained by the stimulus purity of total light, the brightness of total light, and the stimulus purity and brightness of total light as an ordered pair. It is a figure which shows the path which is the locus of the moving point obtained by the stimulus purity of total light, the brightness of total light, and the stimulus purity and brightness of total light as an ordered pair. It is a figure which shows the path which is the locus of the moving point obtained by the stimulus purity of total light, the brightness of total light, and the stimulus purity and brightness of total light as an ordered pair. It is a figure which shows the path which is the locus of the moving point obtained by the stimulus purity of total light, the brightness of total light, and the stimulus purity and brightness of total light as an ordered pair. It is a figure which shows the path which is the locus of the moving point obtained by the stimulus purity of total light, the brightness of total light, and the stimulus purity and brightness of total light as an ordered pair. It is a figure which shows the stimulus purity of the total light, and the brightness of the total light. It is a block diagram which shows the structure of a control signal generator. It is a flow chart which shows the algorithm of the process which gives a chromaticity change to the output of a light source.

--Overview ---
FIG. 1A is a block diagram of the lighting control system 100. The lighting control system 100 includes an input device 110, a controller 120, and a lighting device 130 and a lighting device 150. The controller 120 includes a control signal generator 122 and a lighting controller 124.

The lighting control system 100 realizes direct lighting or indirect lighting, and a combination thereof. Direct lighting is, for example, a ceiling light or a downlight. Indirect lighting is, for example, coffer lighting, cornice lighting, and cove lighting, and combinations thereof. The lighting control system 100 gives the user a feeling of relaxation and makes it easier to match the rhythm of repeated breathing by periodically changing the stimulation purity and the brightness of the light emitted by the lighting device 130 and the lighting device 150. The lighting control system 100 is typically located in the vicinity where the indoor user is trying to relax.

The lighting control system 100 may include other lighting equipment in addition to the lighting equipment 130 and the lighting equipment 150. Specifically, the control signal generator 122 may change the light radiated from other lighting devices in addition to the lighting device 130 and the lighting device 150 in time.

The input device 110 transmits the operating parameters of the lighting control system 100 selected by the user to the control signal generator 122. Such operating parameters represent, for example, the on / off of the lighting control system 100 and the period of temporal changes in the stimulus purity and brightness of the light of the lighting control system 100. The input device 110 is, for example, a mechanical or electronic switch. The input device 110 may be provided on the housing of the lighting control system 100, or may be provided in a housing separate from the lighting control system 100. In the former case, the input device 110 is coupled to the control signal generator 122 by a wiring provided in the housing. In the latter case, the input device 110 is wirelessly coupled to the control signal generator 122. Wireless coupling is achieved, for example, by transmission of operating parameters by infrared light or electromagnetic waves.

The input device 110 may receive the music being listened to by the user as an input, extract the tempo information thereof, and output the music to the control signal generator 122. The control signal generator 122 can change the light emitted from the lighting device 130 and the lighting device 150 at a speed suitable for the music based on the tempo information of the music.

The control signal generator 122 generates control signals 123A and 123B that temporally change the stimulation purity and brightness of the light emitted from the lighting device 130 and the lighting device 150, and sends them to the lighting controller 124. The control signal generator 122 is realized by, for example, a processor and a memory, and realizes a control method described later.

The lighting controller 124 receives the control signals 123A and 123B from the control signal generator 122 and drives the lighting device 130 and the lighting device 150. The lighting controller 124 temporally changes the stimulation purity and the brightness of the light emitted from the lighting device 130 and the lighting device 150 based on the control signals 123A and 123B. The lighting controller 124 changes the outputs of the lighting device 130 and the lighting device 150 by, for example, pulse width modulation (PWM).

The lighting device 130 and the lighting device 150 are, for example, lighting devices including a light emitting diode (LED). In certain embodiments, the luminaire 130 and the luminaire 150 include multiple groups of LEDs. In the embodiment of FIG. 1A, the illuminating device 130 includes a first light source 132 and a second light source 134, and the illuminating device 150 includes a first light source 152 and a second light source 154. It is assumed that the first light source 132 emits the first light and the second light source 134 emits the second light. It is assumed that the first light source 152 emits the first light and the second light source 154 emits the second light. In this embodiment, the second light has a chromaticity different from that of the first light.

The control signal generator 122 adds up the first light emitted by the first light source 132 and the second light emitted by the second light source 134 by changing the output of at least one of the first light and the second light with time. The chromaticity of the total light is continuously and repeatedly changed between the first chromaticity and the second chromaticity. Further, the control signal generator 122 adds up the first light emitted by the first light source 152 and the second light emitted by the second light source 154 by changing the output of at least one of the first light and the second light with time. The chromaticity of the combined light is continuously and repeatedly changed between the first chromaticity and the second chromaticity. In certain specific embodiments, the first chromaticity is a chromatic color and the second chromaticity is an achromatic color, or a color closer to an achromatic color than the first chromaticity. The term "continuous" may be used as long as it is recognizable to the human eye, and may include unrecognizable discontinuities. “Repetition” means that, for example, the change in chromaticity is repeated a plurality of times.

The first light source 132 and the second light source 134 are, for example, the first light and the first light of a combination of one of R (red) W (white), G (green) W, B (blue) W, RG, YB and the like. It emits two lights. For example, the first light source 132 emits the first light of R, and the second light source 134 emits the second light of W. More specifically, the first light source 132 and the second light source 134 are within the basic white color name region defined by JIS Z 8110-1995 color display method-color name of the light source color (equal energy white chromaticity). 25-step elliptical formula of McAdam ellipse centered on: Center coordinates (0.333,0.333), major radius a (0.059), minor radius b (0.024), tilt θ (deg) (59) with respect to x-axis of major axis) A light-emitting element that emits light and a monochromatic light-emitting diode. More preferably, the vicinity of isoenergy white chromaticity recognized as white during non-dimming toning (steady state) (MacAdam ellipse 5-step ellipse: in center coordinates (0.333, 0.333), semi-major axis a (0.012), A light emitting element having a short radius b (0.005) and an inclination θ (deg) (59)) with respect to the x axis of the long axis, and a monochromatic light emitting diode. The description in the present disclosure regarding the first light source 132 and the second light source 134 also applies to the first light source 152 and the second light source 154.

The luminaire 130 and the luminaire 150 may include three groups of LED groups (first light source, second light source, and third light source). In this case, the first light source, the second light source, and the third light source are, for example, R (main wavelength λ _d : 610 nm), G (main wavelength λ _d : 530 nm), B (main wavelength λ _d : 450 nm). Is emitted respectively.

The lighting device 130 and the lighting device 150 may include four groups of LED groups (first light source, second light source, third light source, and fourth light source). In this case, the first light source, the second light source, the third light source, and the fourth light source emit, for example, R, G, B, and W. Alternatively, the first, second, third, and fourth light sources are, for example, R (main wavelength λ _d : 620 nm), Y (yellow) (main wavelength λ _d : 570 nm), G (main). Wavelength λ _d : 525 nm) and B (main wavelength λ _d : 460 nm) are emitted, respectively.

The lighting control system 100 may include an input device 110, a controller 120, and a lighting device 130 and a lighting device 150, but may not include an input device 110. In this case, the input device 110 is realized as a separate element. Further, only the controller 120 may be provided in the housing, and the lighting device 130 and the lighting device 150 may be externally attached.

FIG. 1B is a diagram showing a realization example of lighting devices 130 and 150 in space 1B00. The luminaire 130 is typically a low brightness luminaire, which can be, for example, wall lighting for the entire environment. The lighting device 130 typically causes fluctuations in which the user does not immediately notice the change in light color. The lighting device 130 is also referred to as "ground" (background) lighting.

The lighting device 150 is typically a high-brightness lighting device, for example, lighting embedded in a wall, lighting suspended from a wall, or floor stand lighting arranged in front of the wall. The luminaire 150 typically causes fluctuations that make the change in light color noticeable to the user comfortably (ie, not unpleasant). The lighting device 150 is also referred to as "figure" (accent) lighting.

Here, it is assumed that the lighting device 130 irradiates the first region and the lighting device 150 illuminates the second region. In certain embodiments, at least a portion of the second region overlaps the first region, the first region being wider than the second region. As a result, by controlling the lighting devices 130 and 150 in the space as "ground" and "figure", the user can feel the fluctuation more spatially without discomfort.

In some embodiments, more than 50% of the second region overlaps the first region. As a result, it is possible to provide the user with a comfortable spatial perception. In some embodiments, the first region is 1.2 times or more the second region. This allows the user to recognize a reasonable difference between the "ground" luminaire 130 and the "figure" luminaire 150.

FIG. 1C is a diagram showing a path L130 which is a locus of a moving point of the total light of the lighting device 130 and a path L150 which is a locus of a moving point of the total light of the lighting device 150. The control signal generator 122 changes the time so that the total light, which is the sum of the first light emitted by the first light source 132 of the lighting device 130 and the second light emitted by the second light source 134, follows the path L130. The control signal generator 122 changes the time so that the total light, which is the sum of the first light emitted by the first light source 152 of the lighting device 150 and the second light emitted by the second light source 154, follows the path L150. In a space where light from a plurality of lighting devices is superimposed, it is necessary to control the hue and saturation of the light color of each lighting device. According to the temporal change of the light color shown in FIG. 1C, it is possible to give the user an effective color tone fluctuation sensation.

--The trajectory of the total light emitted by the lighting equipment in the "figure" ---
In certain embodiments, the control signal generator 122 causes the combined light of the luminaire 150 to follow one of the paths 330, 430, 530, 630, 730, 830 described below instead of the path L150. Change over time. Specifically, in one embodiment, the lighting device 150 that functions as a "figure" (accent) emits a first light source 152 that emits first light and a second light that has a chromaticity different from that of the first light. Includes 2 light sources 154. The controller 120 changes the stimulus purity and the brightness of the total light, which is the sum of the lights emitted by the light sources 152 and 154, by changing the outputs of the first light and the second light with time. Is configured. In a coordinate system in which the stimulus purity and the brightness are variables, the moving points representing the stimulus purity and the brightness of the total light are on the path connecting the first point, the second point, the third point, and the first point, which are different from each other. , 1st point, 2nd point, 3rd point, and 1st point in this order. As a result, the lighting device 150 shown in the "figure" can provide the user with more effective color tone fluctuations. In this case, the lighting device 130 moves on the L130.

In one embodiment, the control signal generator 122, in addition to controlling the combined light of the illuminating device 150, causes the combined light of the illuminating device 130 to replace the path L130 with the paths 330, 430, 530, 630, 730 described below. , 830 to follow any one of them over time. As a result, the user can feel the fluctuation of the "ground" in addition to the fluctuation of the "figure".

The control signal generator 122 changes the period from the first point to the return to the first point via the second and third points according to the tempo of the music. As a result, the lighting device 150, which is the “figure”, can provide the user with more effective color tone fluctuations that match the music.

--Adaptation level control and production control ---
FIG. 1D shows a plot 1D30 showing a change in the total light stimulation purity S (vertical axis) of the lighting device 130 with respect to time T (horizontal axis), and a stimulation purity S of the total light of the lighting device 150 with respect to time T (horizontal axis). It is a graph which shows the plot 1D50 which shows the change of (vertical axis). As will be described later, the same plot is obtained when the vertical axis of FIG. 1D represents the luminance. In FIG. 1D, the stimulus purity S (or brightness) of the total light of the lighting device 130 gradually decreases while changing periodically, and the stimulus purity S (or brightness) of the total light of the lighting device 150 decreases monotonically.

In certain embodiments, the time width of the step change in brightness or stimulus purity of the luminaire 130 is greater than the time width of the step change in brightness or stimulus purity of the luminaire 150. The "time width of step change of brightness" means the time width required for the total brightness of the lighting equipment to change by the minimum step that can be recognized by the human eye. The "time width of the step change of the stimulus purity" means the time width required for the stimulus purity of the total light of the lighting equipment to change by the minimum step that can be recognized by the human eye. The time width of the step change of the plot 1D30 is larger than the time width of the step change of the plot 1D50. That is, the change in plot 1D30 is slower than the change in plot 1D50. This allows the user to recognize a reasonable difference between the "ground" luminaire 130 and the "figure" luminaire 150.

Assuming that the vertical axis of FIG. 1D represents the brightness, the plots 1D30 and 1D50 representing the brightness changes of the luminaires 130 and 150 can be the same as the plots for stimulus purity. In certain embodiments, the brightness of the lighting device 130 is less than the maximum brightness of the lighting device 150 during one cycle of the brightness change. For example, the plot 1D30 takes a value smaller than the envelope 1D50e, which corresponds to the maximum luminance in one cycle of the plot 1D50. This allows the user to recognize a reasonable difference between the "ground" luminaire 130 and the "figure" luminaire 150.

FIG. 1E shows a plot 1E30 showing a change in the total light stimulation purity S (vertical axis) of the lighting device 130 with respect to time T (horizontal axis), and a stimulation purity S of the total light of the lighting device 150 with respect to time T (horizontal axis). It is a graph which shows the plot 1E50 which shows the change of (vertical axis). As described above, the same plot is obtained when the vertical axis of FIG. 1E represents the luminance. In FIG. 1E, the stimulus purity S (or brightness) of the total light of the lighting device 130 gradually increases while changing periodically, and the stimulus purity S (or brightness) of the total light of the lighting device 150 increases monotonically.

Also in the case of FIG. 1E, as described above, the time width of the step change of the brightness or the stimulus purity of the lighting device 130 is larger than the time width of the step change of the brightness or the stimulus purity of the lighting device 150. This allows the user to recognize a reasonable difference between the "ground" luminaire 130 and the "figure" luminaire 150. Further, the brightness 1E30 of the lighting device 130 is smaller than the maximum brightness 1E50e in one cycle of the brightness change of the lighting device 150. This allows the user to recognize a reasonable difference between the "ground" luminaire 130 and the "figure" luminaire 150.

FIG. 1F shows a plot 1F30 showing a change in the total light stimulation purity S (vertical axis) of the lighting device 130 with respect to time T (horizontal axis), and a stimulation purity S of the total light of the lighting device 150 with respect to time T (horizontal axis). It is a graph which shows the plot 1F50 which shows the change of (vertical axis). As described above, the same plot is obtained when the vertical axis of FIG. 1F represents the luminance. In FIG. 1F, the stimulus purity S (or brightness) of the total light of the lighting device 130 changes periodically while its amplitude fluctuates, and the stimulus purity S (or brightness) of the total light of the lighting device 150 changes periodically. Change. That is, the brightness and the stimulus purity of the lighting device 150 change periodically, and the brightness of the lighting device 130 changes in proportion to the maximum brightness in one cycle of the brightness change of the lighting device 150. This allows the user to recognize the harmony between the "ground" luminaire 130 and the "figure" luminaire 150.

Also in the case of FIG. 1F, as described above, the time width of the step change of the brightness or the stimulus purity of the lighting device 130 is larger than the time width of the step change of the brightness or the stimulus purity of the lighting device 150. This allows the user to recognize a reasonable difference between the "ground" luminaire 130 and the "figure" luminaire 150. Further, the brightness 1F30 of the lighting device 130 is smaller than the maximum brightness 1F50e in one cycle of the brightness change of the lighting device 150. This allows the user to recognize a reasonable difference between the "ground" luminaire 130 and the "figure" luminaire 150.

FIG. 1G shows a plot 1G30 showing a change in the total light stimulation purity S (vertical axis) of the lighting device 130 with respect to time T (horizontal axis), and a stimulation purity S of the total light of the lighting device 150 with respect to time T (horizontal axis). It is a graph which shows the plot 1G50 which shows the change of (vertical axis). As described above, the same plot is obtained when the vertical axis of FIG. 1G represents the luminance. In FIG. 1G, the stimulus purity S (or brightness) of the total light of the lighting device 130 changes periodically, but the amplitude is constant, and the stimulus purity S (or brightness) of the total light of the lighting device 150 is also constant. is there.

Also in the case of FIG. 1G, as described above, the time width of the step change of the brightness or the stimulus purity of the lighting device 130 is larger than the time width of the step change of the brightness or the stimulus purity of the lighting device 150. This allows the user to recognize a reasonable difference between the "ground" luminaire 130 and the "figure" luminaire 150. Further, the brightness 1G30 of the lighting device 130 is smaller than the maximum brightness 1G50e in one cycle of the brightness change of the lighting device 150. This allows the user to recognize a reasonable difference between the "ground" luminaire 130 and the "figure" luminaire 150.

In the controls described with reference to FIGS. 1D-1G, the luminaire 130 controls the user's adaptation level and the luminaire 150 controls the effect. As a result, it is possible to make the fluctuation feel larger spatially while reducing the discomfort given to the user.

--Comparison over time (perception of pattern change) ---
Color discrimination is determined by the ratio from the white point in the line segment connecting wavelength discrimination (single wavelength nm) and purity discrimination (white and spectral color (single wavelength color), the spectral color is 100%, and is equal energy white. Is 0%), and color discrimination (including hue and purity). Regarding the simultaneous comparison of colors and the comparison with time, the color discrimination ability by memory is increased by about twice as the discrimination threshold as compared with the case where two colors are compared side by side at the same time.

FIG. 1H is a diagram showing the time characteristics of color discrimination over time. In the experiment, the test wavelength (λt) and the comparative wavelength (λc) are presented over time, and the constant method (presented many times in a random order to judge the existence, that is, whether or not the so-called color difference can be understood). Is carried out using. Black changed the presentation start time delay SOA (stimulus onset asynchrony) from 0 s to 5.5 s, and white changed the SOA in a short time range from 0 s to 220 ms. FIG. 1H shows the results of measuring the wavelength discrimination threshold Δλ by changing the presentation duration D to 55 ms (black triangle), 110 ms (black circle, white circle), and 220 ms (black square) as parameters. The wavelength discrimination value (Δλ) becomes a substantially constant value when the SOA is 200 ms regardless of the presentation duration D, and the deterioration of the wavelength discrimination ability hardly progresses. Therefore, it is preferable to change the light color in a time of 200 ms or less in order to make the change easy to notice, and to change the light color in a time of 200 ms or more in order to make the change difficult to notice.

In addition, there is a transient peak in the rise of the sense of brightness when light hits the retina, and then calms down. FIG. 1I is a diagram showing changes in the number of discrimination thresholds with respect to time for colors of different wavelengths. FIG. 1I shows the fact that the color discrimination ability also decreases in a short time when the sensation of brightness is low, and conversely, when the stimulus is seen for several seconds, the chromatic adaptation effect causes the gaze for a longer time. Shows the fact that fatigue reduces discriminative ability. Therefore, it is preferable to use 0.2 s (= 200 ms) as the SOA. That is, in one embodiment, the time width of the step change of the brightness or stimulus purity of the lighting device 130 is longer than 200 ms, and the time width of the step change of the brightness or stimulus purity of the lighting device 150 is 200 ms or less. This makes it easier for the user to recognize the difference between the lighting device 130, which is the background lighting, and the lighting device 150, which is the accent lighting.

--Brightness difference discrimination threshold and color difference discrimination threshold ---
FIG. 1J is a diagram showing changes in the luminance difference discrimination threshold with respect to the foveal adaptation brightness. The wall surface brightness in a general indoor environment is 1000 cd / m ² or less. Therefore, the luminance difference discrimination threshold may be 1 cd / m ² or more.

FIG. 1K is a diagram showing a color discrimination ellipse of MacAdam. The color-difference discrimination threshold is defined by MacAdam's color-difference ellipse. Therefore, it suffices to have a color difference of Step 1 or more centering on the light color of the background.

--Color adaptation ---
If you keep looking at the same color, the color may gradually fade. It is also said that the chromaticity felt by white light shifts from the vicinity of equal energy white to the adaptive light side. Therefore, if a highly saturated light color is used for the "ground", the sensitivity of the "figure" to color fluctuations may decrease. Further, if a complementary color is used for the "ground", the white point is straddled, so that it is difficult to feel the white color of the "figure" and it is difficult to give a so-called achromatic feeling.

FIG. 1L is a diagram showing a preferable relationship between the hue and stimulus purity of the lighting device 130 which is the “ground” (background) and the lighting device 150 which is the “figure” (accent). In one embodiment, the hue difference between the hue of the lighting device 130 and the hue of the lighting device 150 is 90 degrees or less, and the stimulation purity of the lighting device 150 is larger than the stimulation purity of the lighting device 130. As a result, the chromaticity change range in which the chromaticity value felt in white light is on the first light color side is narrowed, and the number of change steps can be reduced. However, it is possible to realize low illuminance while making the user feel white light only by the total light of the lighting device 130 or the total light of the lighting device 150.

Further, in the hue circle, a color having a hue angle difference of 30 to 60 degrees with respect to the reference hue is called a similar hue, but the color difference is more than that of an adjacent hue having an angle of 30 degrees or less, which is almost a similar color. Can be felt without discomfort. Therefore, preferably, by setting the hue angle difference of the lighting device 150 hue to 60 degrees or less with respect to the lighting device 130 hue, the difference in color between the ground and the figure can be felt more comfortably.

--Change in chromaticity of total light ---
FIG. 2 is a diagram showing a chromaticity change 200 of the total light that changes between the first light and the second light. Point 201 represents isoenergy white. The area 202 represents an area having the basic color name “white”. The control signal generator 122 changes the total light 210 so as to continuously reciprocate between, for example, the first chromaticity 211 of the first light and the second chromaticity 212 of the second light. That is, the total light 210 changes from the first chromaticity 211 to the second chromaticity 212, and returns to the first chromaticity 211 again. In the change from the first chromaticity 211 to the second chromaticity 212, the chromaticity typically changes continuously. Continuous changes in chromaticity are preferred to improve the user's relaxing effect. In this example, the first chromaticity 211 of the first light is blue light, and the second chromaticity 212 of the second light is light blue light that is not white.

The total light 210 is not limited to bluish colors and can be any suitable color. For example, the total light 220 may be changed so as to continuously reciprocate between the first chromaticity 221 of the first light and the second chromaticity 222 of the second light. In this case, the first chromaticity 221 is orange light, and the second chromaticity 222 is light orange light that is not white.

--Stimulation purity and brightness change pattern of total light ---
Light can generally be represented by brightness and color. Specifically, brightness is defined by luminance and color is defined by chromaticity. Further, chromaticity is defined by hue and stimulus purity. Of these light parameters, the control signal generator 122 changes the stimulus purity and brightness of the combined light, as in the pattern detailed below.

--Pattern 1-
FIG. 3 is a diagram showing a path 330 which is a locus of moving points obtained by ordering the stimulus purity 310 of the total light, the brightness 320 of the total light, and the stimulus purity and brightness of the total light as an ordered pair. Times t1 to t2 are called period P1, times t2 to t3 are called period P2, and times t3 to t4 are called period P3. The times t1, t2, t3, and t4 correspond to the first point 331, the second point 332, the third point 333, and the first point 331 in the path 330, respectively.

The control signal generator 122 temporally determines the stimulus purity and brightness of the total light, which is the sum of the first light emitted by the first light source 132 and the second light emitted by the second light source 134, such as the stimulus purity 310 and the brightness 320. Change. In a coordinate system in which the stimulus purity and the brightness are variables, the moving points representing the stimulus purity and the brightness of the total light are on the path connecting the first point 331, the second point 332, the third point 333, and the first point 331. , The first point 331, the second point 332, the third point 333, and the first point 331 move cyclically in this order.

In the path 330, the stimulation purity 310 and the brightness 320 increase monotonically during the period from the first point 331 to the second point 332 (period P1). During the period from the second point 332 to the third point 333 (period P2), the stimulation purity 310 monotonically increases and the brightness 320 is constant. During the period from the third point 333 to the first point 331 (period P3), the stimulation purity 310 and the brightness 320 monotonically decrease.

In the present disclosure, periods P1, P2, and P3 correspond to the three modes of respiration: inspiration, arrest, and exhalation, respectively. It can be said that the total light according to the pattern 1 in FIG. 3 is bright in the period P1, bright in the period P2, and very dark in the period P3. For this reason, there are many bright and vivid state change steps, and it is easy to feel a feeling of expansion. Since it brightens rapidly, it is suitable for respiratory changes that stop with a short inspiration and prolong exhalation.

--Pattern 2-
FIG. 4 is a diagram showing a path 430 which is a locus of moving points obtained by using the stimulus purity 410 of the total light, the brightness 420 of the total light, and the stimulus purity and brightness of the total light as an ordered pair. Times t1 to t2 are called period P1, times t2 to t3 are called period P2, and times t3 to t4 are called period P3. The times t1, t2, t3, and t4 correspond to the first point 431, the second point 432, the third point 433, and the first point 431 in the path 430, respectively.

The control signal generator 122 temporally determines the stimulus purity and brightness of the total light, which is the sum of the first light emitted by the first light source 132 and the second light emitted by the second light source 134, such as the stimulus purity 410 and the brightness 420. Change. In a coordinate system in which the stimulus purity and the brightness are variables, the moving points representing the stimulus purity and the brightness of the total light are on the path connecting the first point 431, the second point 432, the third point 433, and the first point 431. , The first point 431, the second point 432, the third point 433, and the first point 431 move cyclically.

In the pass 430, during the period from the first point 431 to the second point 432 (period P1), the stimulation purity 410 monotonically increases and the brightness 420 is constant. During the period from the second point 432 to the third point 433 (period P2), the stimulation purity 410 is constant and the brightness 420 increases monotonically. During the period from the third point 433 to the first point 431 (period P3), the stimulation purity 410 and the brightness 420 decrease monotonically.

It can be said that the total light according to the pattern 2 in FIG. 4 is bright in the period P1, bright in the period P2, and very dark in the period P3. For this reason, there are many bright and vivid state change steps, and it is easy to feel a feeling of expansion. Since it brightens a little slowly, it is suitable for large stretch movements.

--Pattern 3-
FIG. 5 is a diagram showing a path 530 which is a locus of moving points obtained by ordering the stimulus purity 510 of the total light, the brightness 520 of the total light, and the stimulus purity and brightness of the total light. Times t1 to t2 are called period P1, times t2 to t3 are called period P2, and times t3 to t4 are called period P3. The times t1, t2, t3, and t4 correspond to the first point 531 and the second point 532, the third point 533, and the first point 531 in the path 530, respectively.

The control signal generator 122 temporally determines the stimulus purity and brightness of the total light, which is the sum of the first light emitted by the first light source 132 and the second light emitted by the second light source 134, such as stimulus purity 510 and brightness 520. Change. In a coordinate system in which the stimulus purity and the brightness are variables, the moving points representing the stimulus purity and the brightness of the total light are on the path connecting the first point 531 and the second point 532, the third point 533, and the first point 531. , 1st point 531 and 2nd point 532, 3rd point 533, and 1st point 531 cyclically move.

In the path 530, the stimulation purity 510 and the brightness 520 increase monotonically during the period from the first point 531 to the second point 532 (period P1). During the period from the second point 532 to the third point 533 (period P2), the stimulation purity 510 is constant and the brightness 520 decreases monotonically. During the period from the third point 533 to the first point 531 (period P3), the stimulus purity 510 decreases monotonically and the brightness 520 is constant.

It can be said that the total light according to the pattern 3 in FIG. 5 is bright in the period P1, dark in the period P2, and very dark in the period P3. Therefore, there are many dark and dull state change steps, and it is easy to feel a feeling of contraction. Since it darkens rapidly, it is suitable for sudden contraction.

--Pattern 4-−
FIG. 6 is a diagram showing a path 630 which is a locus of moving points obtained by ordering the stimulus purity 610 of the total light, the brightness 620 of the total light, and the stimulus purity and brightness of the total light. Times t1 to t2 are called period P1, times t2 to t3 are called period P2, and times t3 to t4 are called period P3. The times t1, t2, t3, and t4 correspond to the first point 631, the second point 632, the third point 633, and the first point 631 in the path 630, respectively.

The control signal generator 122 temporally determines the stimulus purity and brightness of the total light, which is the sum of the first light emitted by the first light source 132 and the second light emitted by the second light source 134, such as stimulus purity 610 and brightness 620. Change. In a coordinate system in which the stimulus purity and the brightness are variables, the moving points representing the stimulus purity and the brightness of the total light are on the path connecting the first point 631, the second point 632, the third point 633, and the first point 631. , The first point 631, the second point 632, the third point 633, and the first point 631 move cyclically.

In the path 630, the stimulation purity 610 and the brightness 620 increase monotonically during the period from the first point 631 to the second point 632 (period P1). In the period from the second point 632 to the third point 633 (period P2), the stimulation purity 610 decreases monotonically and the brightness 620 is constant. During the period from the third point 633 to the first point 631 (period P3), the stimulation purity 610 and the brightness 620 decrease monotonically.

It can be said that the total light according to the pattern 4 in FIG. 6 is bright in the period P1, grayish in the period P2, and very dark in the period P3. Therefore, there are many dark and dull state change steps, and it is easy to feel a feeling of contraction. Since it darkens a little, it is easy to feel a calm atmosphere, and it is suitable for gentle breathing before going to bed.

In patterns 1 to 4, one of the stimulus purity and the brightness takes a constant value at two of the first, second, and third points. In particular, the period P2 between the time t2 and the time t3 corresponding to the second and third points corresponds to the mode of respiratory arrest. That is, in the mode of respiratory arrest, when one of the stimulation purity and the brightness is constant, the user can easily recognize the three modes of breathing.

--Pattern 5 (deformation of patterns 1 to 4) ---
FIG. 7 is a diagram showing a path 730 which is a locus of moving points obtained by ordering the stimulus purity 710 of the total light, the brightness 720 of the total light, and the stimulus purity and brightness of the total light. Times t1 to t2 are called period P1, times t2 to t3 are called period P2a, times t3 to t4 are called period P2b, and times t4 to t5 are called period P3. The times t1, t2, t3, t4, and t5 correspond to the first point 731, the second point 732, the third point 733, the second point 732, and the first point 731 in the path 730, respectively.

The control signal generator 122 temporally determines the stimulus purity and brightness of the total light, which is the sum of the first light emitted by the first light source 132 and the second light emitted by the second light source 134, such as stimulus purity 710 and brightness 720. Change. In a coordinate system in which the stimulus purity and the brightness are variables, the moving point representing the stimulus purity and the brightness of the total light is the first point 731 on the path connecting the first point 731, the second point 732, and the third point 733. , The second point 732, the third point 733, the second point 732, and the first point 731 move back and forth in this order.

In pass 730, the stimulation purity 710 and the brightness 720 increase monotonically during the period from the first point 731 to the second point 732 (period P1). During the period from the second point 732 to the third point 733 (period P2a), the stimulation purity 710 increases monotonically and the brightness 720 is constant. During the period from the third point 733 to the second point 732 (period P2b), the stimulus purity 710 decreases monotonically and the brightness 720 is constant. During the period from the second point 732 to the first point 731 (period P3), the stimulation purity 710 and the brightness 720 decrease monotonically.

Pattern 5 is a modification of pattern 1. The total light according to the pattern 5 makes it easy for the user to be aware of the state of stopping during the periods P2a and P2b. The pattern in which the periods P2a and P2b reciprocate on the same path as in pattern 5 is not limited to the application to pattern 1, and may be applied to other patterns 2 to 4.

--Pattern 6 (the sides of the path are curved) ---
FIG. 8 is a diagram showing a path 830 which is a locus of moving points obtained by ordering the stimulus purity 810 of the total light, the brightness 820 of the total light, and the stimulus purity and brightness of the total light as an ordered pair. Times t1 to t2 are called period P1, times t2 to t3 are called period P2, and times t3 to t4 are called period P3. The times t1, t2, t3, and t4 correspond to the first point 831, the second point 832, the third point 833, and the first point 831 in the path 830, respectively.

The control signal generator 122 temporally determines the stimulus purity and brightness of the total light, which is the sum of the first light emitted by the first light source 132 and the second light emitted by the second light source 134, such as stimulus purity 810 and brightness 820. Change. In a coordinate system in which the stimulation purity and brightness are variables, the moving points representing the stimulation purity and brightness of the total light are on the path connecting the first point 831, the second point 832, the third point 833, and the first point 831. , 1st point 831, 2nd point 832, 3rd point 833, and 1st point 831.

In the pass 830, the stimulation purity 810 and the brightness 820 increase monotonically during the period from the first point 831 to the second point 832 (period P1). In the period from the second point 832 to the third point 833 (period P2), the stimulation purity 810 increases monotonically, the brightness 820 increases in the first half, and decreases after reaching the maximum value in the second half. During the period from the third point 833 to the first point 831 (period P3), the stimulation purity 810 and the brightness 820 decrease monotonically.

Pattern 6 is a modification of pattern 1. In pattern 1, the path 330 is a triangle, and the portion corresponding to the periods P1 to P3 is a straight line. On the other hand, the portion of the path 830 corresponding to the periods P1 to P3 is a curve. Specifically, in the periods P1 and P3, the path 830 is inside the side of the triangle, and in the period P2, the path 830 is outside the side of the triangle. In various embodiments, as in pattern 6, the path connecting the first, second, third, and first points is not limited to triangles and may include curved sections.

In addition, paths of adjacent periods may be connected substantially smoothly. For example, at the second point 832, the path of the period P1 and the path of the period P2 may be connected substantially smoothly without forming a sharp point. As used herein, the term "substantially smooth" is defined as long as it feels smooth to the eyes of the user who sees the total light, and is not interpreted to exclude minute sharp points. Here, the pointed points of the path can be caused by stepwise (ie, discrete) changes in stimulus purity or brightness. The amount of change in stimulus purity or brightness that can be perceived by the user changes depending on the hue. Thus, in hues that are less sensitive to the user, even larger sharp points may appear smooth to the user.

A pattern such as pattern 6 in which a part of the path passes through the inside or outside of the side of the triangle is not limited to the application to the pattern 1, and may be applied to other patterns 2 to 4.

--Change in cycle ---
FIG. 9 is a diagram showing the stimulation purity 910 of the total light and the brightness 920 of the total light. The control signal generator 122 temporally determines the stimulus purity and brightness of the total light, which is the sum of the first light emitted by the first light source 132 and the second light emitted by the second light source 134, such as stimulus purity 910 and brightness 920. Change. In pattern 1 of FIG. 3, the sum of periods P1 to P3 (referred to as "period") remained constant. In FIG. 9, the sum of the periods P1 to P3 is defined as the period PT1, PT2, PT3, ..., PTi (i = natural number). In the embodiment using the pattern of FIG. 9, the period PTi increases with the passage of time. This makes it easier for the user to feel the gradual calming down.

Contrary to FIG. 9, the period PTi may decrease with the passage of time. This makes it easier for the user to feel the gradual awakening.

In certain embodiments, the control signal generator 122 may vary the period PTi according to the tempo of the music. For example, by extracting the tempo information of the music played by the playback device used together with the lighting control system 100, the periodic PTi can be set to a value suitable for the tempo of the music being played. As a result, the user can feel the change of the total light in combination with the music, and can easily feel the three modes of breathing and feel relaxed.

--Intro period, outro period ---
For example, the period in which the stimulation purity and the brightness of the total light are changed in the patterns shown in FIGS. 3 to 6 is the main period. In the main period, by using the above-mentioned patterns 1 to 4 and the like, for example, the user can relax while clearly recognizing the three modes of breathing. An intro period may be placed before this main period as a preliminary period for introduction. An outro period may also be placed after this main period as a preliminary period for sedation. During the intro and outro periods, the user may use patterns that are not particularly aware of the mode of respiratory arrest. This makes it possible for the user to more effectively recognize the existence of the mode of stopping during the main period.

Hardware FIG. 10 is a block diagram showing the structure of the control signal generator 122. The control signal generator 122 includes a processor 1010, a memory 1020, and an input / output unit 1030. The processor 1010 executes a process of giving a chromaticity change as shown in FIG. 2 to the outputs of the lighting device 130 and the lighting device 150, for example. Memory 1020 stores instructions and parameters used for processing performed by processor 1010. The input / output unit 1030 generates a control based on the output of the processor 1010 and outputs the control to the lighting controller 124. The input / output unit 1030 may be incorporated in the processor 1010.

The control signal generator 122 and the lighting controller 124 may be realized as one element (for example, a semiconductor chip). As an alternative, the control signal generator 122 and the lighting controller 124 may be provided in one housing.

--Software ---
FIG. 11 is a flow chart showing an algorithm 1100 of processing for applying a chromaticity change (for example, chromaticity change 200) according to the present disclosure to the outputs of the lighting device 130 and the lighting device 150. At 1110, processor 1010 receives data from the input / output unit 1030. This data is, for example, data indicating an operation mode of the lighting control system 100 input by the user to the input device 110. At 1120, processor 1010 receives data on chromaticity changes from memory 1020. At 1130, processor 1010 outputs a control signal to the lighting controller 124 based on the received data. If necessary, the algorithm 1100 may be repeatedly executed by returning control from 1130 to 1110.

The subject of the device, system, or method in the present disclosure comprises a computer (eg, a control signal generator 122). By executing a program (for example, Algorithm 900) by this computer, the function of the subject of the device, system, or method in the present disclosure is realized. A computer has a processor that operates according to a program as a main hardware configuration. The type of processor does not matter as long as the function can be realized by executing the program. The processor is composed of one or more electronic circuits including a semiconductor integrated circuit (IC) or an LSI (large scale integration). The plurality of electronic circuits may be integrated on one chip or may be provided on a plurality of chips. A plurality of chips may be integrated in one device, or may be provided in a plurality of devices. The program is recorded on a non-temporary recording medium such as a computer-readable ROM, optical disc, or hard disk drive. The program may be stored in the recording medium in advance, or may be supplied to the recording medium via a wide area communication network including the Internet or the like.

100 Lighting control system 120 Controller 122 Control signal generator 124 Lighting controller 130 Lighting equipment 132 First light source 134 Second light source 150 Lighting equipment 152 First light source 154 Second light source

Claims (8)

A lighting control system including a first lighting device that illuminates a first region, a second lighting device that illuminates a second region, and a controller that controls the first lighting device and the second lighting device.
The controller
A control signal generator that generates a first control signal that controls the first lighting device, a second control signal that controls the second lighting device, and irradiation of the first lighting device based on the first control signal. A driver for controlling the irradiation of the second lighting device based on the second control signal is provided.
At least a part of the second region overlaps with the first region,
The first region is wider than the second region.
The time width of the step change of the brightness or the stimulus purity of the first lighting device is larger than the time width of the step change of the brightness or the stimulus purity of the second lighting device.
A lighting control system in which the brightness of the first lighting device is smaller than the maximum brightness in one cycle of the brightness change of the second lighting device. The time width of the step change of the brightness or the stimulus purity of the first lighting device is longer than 200 ms, and the time width of the step change of the brightness or the stimulus purity of the second lighting device is 200 ms or less. The lighting control system described. The lighting control system according to claim 1, wherein 50% or more of the second region overlaps with the first region. The lighting control system according to claim 1, wherein the first region is 1.2 times or more the size of the second region. The brightness and stimulus purity of the second lighting device change periodically,
The lighting control system according to claim 1, wherein the brightness of the first lighting device changes in proportion to the maximum brightness of the brightness change of the second lighting device in one cycle. The hue angle difference between the hue of the first lighting device and the hue of the second lighting device is 90 degrees or less.
The lighting control system according to claim 1, wherein the stimulation purity of the second lighting device is larger than the stimulation purity of the first lighting device. The second lighting device is
A plurality of light sources including a first light source that emits a first light and a second light source that emits a second light having a chromaticity different from that of the first light.
By changing the output of each of the first light and the second light with time, the controller temporally changes the stimulation purity and the brightness of the total light, which is the sum of the lights emitted by the plurality of light sources. Configured to change,
In a coordinate system in which the stimulus purity and the brightness are variables, the stimulus purity of the total light and the moving points representing the brightness are different from each other at the first point, the second point, the third point, and the first point. The lighting control system according to claim 1, wherein the first point, the second point, the third point, and the first point move in this order on a path connecting the points. The control signal generator claims that the period from the first point to the return to the first point via the second point and the third point is changed according to the tempo of music. 7. The lighting control system according to 7.