JP7253705B2 - lighting control system - Google Patents

Description

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

Patent Documents 1 to 4 describe illumination devices that change the luminance of illumination light at a frequency close to the respiratory rhythm. Based on the change in 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. 4125001

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

According to the present disclosure, in an embodiment, a first lighting device illuminating a first region, a second lighting device illuminating a second region, and a controller controlling the first lighting device and the second lighting device a control signal generator for generating a first control signal for controlling the first lighting device and a second control signal for controlling the second lighting device; and At least part of the second region, comprising a driver that controls illumination of the first lighting device based on the first control signal and controls illumination of the second lighting device based on the second control signal; overlaps the first region, the first region is wider than the second region, and the time width of the step change in luminance or excitation purity of the first lighting device is equal to the luminance or excitation purity of the second lighting device and the luminance of the first lighting device is less than the maximum luminance in one cycle of the luminance change of the second lighting device.

In a space where light is superimposed, it is possible to provide a lighting control system that more effectively gives the user the feeling of fluctuation due to the above-described change in color tone.

It is a block diagram of an illuminating device. FIG. 10 is a diagram showing an example of implementation of lighting equipment in space; FIG. 4 is a diagram showing a path, which is a trajectory of moving points of combined light from lighting equipment; Fig. 10 is a graph showing a plot representing the variation of the combined light excitation purity (vertical axis) of the luminaire against time (horizontal axis); Fig. 10 is a graph showing a plot representing the variation of the combined light excitation purity (vertical axis) of the luminaire against time (horizontal axis); Fig. 10 is a graph showing a plot representing the variation of the combined light excitation purity (vertical axis) of the luminaire against time (horizontal axis); Fig. 10 is a graph showing a plot representing the variation of the combined light excitation purity (vertical axis) of the luminaire against time (horizontal axis); FIG. 4 is a diagram showing temporal characteristics of color discrimination over time; FIG. 4 is a diagram showing changes in discrimination threshold numbers with respect to time for colors of different wavelengths; FIG. 10 is a diagram showing changes in luminance difference discrimination threshold with respect to fovea-adapted luminance; FIG. 13 shows MacAdam's color discrimination ellipse; Fig. 10 shows the preferred relationship between hue and excitation purity for "ground" (background) lighting fixtures and "figure" (accent) lighting fixtures; It is a figure which shows the chromaticity change of the total light which changes between a 1st light and a 2nd light. FIG. 10 is a diagram showing a path, which is a trajectory of moving points obtained as ordered pairs of stimulation purity of summed light, luminance of summed light, and stimulation purity and luminance of summed light; FIG. 10 is a diagram showing a path, which is a trajectory of moving points obtained as ordered pairs of stimulation purity of summed light, luminance of summed light, and stimulation purity and luminance of summed light; FIG. 10 is a diagram showing a path, which is a trajectory of moving points obtained as ordered pairs of stimulation purity of summed light, luminance of summed light, and stimulation purity and luminance of summed light; FIG. 10 is a diagram showing a path, which is a trajectory of moving points obtained as ordered pairs of stimulation purity of summed light, luminance of summed light, and stimulation purity and luminance of summed light; FIG. 10 is a diagram showing a path, which is a trajectory of moving points obtained as ordered pairs of stimulation purity of summed light, luminance of summed light, and stimulation purity and luminance of summed light; FIG. 10 is a diagram showing a path, which is a trajectory of moving points obtained as ordered pairs of stimulation purity of summed light, luminance of summed light, and stimulation purity and luminance of summed light; FIG. 4 is a diagram showing the excitation purity of summed light and the brightness of summed light; Fig. 3 is a block diagram showing the structure of a control signal generator; FIG. 4 is a flow diagram showing an algorithm for processing to give chromaticity changes to the output of a light source;

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

Lighting control system 100 provides direct or indirect lighting, and combinations thereof. Direct lighting includes, for example, ceiling lights and downlights. Indirect lighting is, for example, cofer 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 repetitive rhythm of breathing by periodically changing the stimulation purity and brightness of the light emitted by the lighting device 130 and the lighting device 150 . The lighting control system 100 is typically placed indoors near where the 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 temporally change the light emitted from other lighting devices in addition to the lighting device 130 and the lighting device 150 .

Input device 110 communicates user-selected operating parameters of lighting control system 100 to control signal generator 122 . Such operating parameters represent, for example, the period of turning the lighting control system 100 on and off and the temporal variation of the light excitation purity and luminance of the lighting control system 100 . 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 separate housing from the lighting control system 100 . In the former case, the input device 110 is coupled to the control signal generator 122 by wiring provided inside the housing. In the latter case, input device 110 is wirelessly coupled to control signal generator 122 . Wireless coupling is achieved by transmission of operating parameters, for example by means of infrared light or electromagnetic waves.

The input device 110 may receive music that the user is listening to as input, extract the tempo information, and output it to the control signal generator 122 . Based on the music tempo information, 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.

Control signal generator 122 generates control signals 123 A and 123 B that temporally vary the excitation purity and brightness of light emitted from lighting device 130 and lighting device 150 and sends them to lighting controller 124 . The control signal generator 122 is implemented by, for example, a processor and memory, and implements the control method described below.

Lighting controller 124 receives control signals 123 A and 123 B from control signal generator 122 and drives lighting device 130 and lighting device 150 . The lighting controller 124 temporally changes the excitation purity and brightness of the light emitted from the lighting device 130 and the lighting device 150 based on the control signals 123A and 123B. Ignition controller 124 varies the output of lighting device 130 and 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 light emitting diodes (LEDs). In some embodiments, lighting device 130 and lighting device 150 include multiple groups of LEDs. In the embodiment of FIG. 1A, lighting device 130 includes first light source 132 and second light source 134 and lighting device 150 includes first light source 152 and second light source 154 . Suppose the first light source 132 emits a first light and the second light source 134 emits a second light. Suppose the first light source 152 emits a first light and the second light source 154 emits a second light. In this embodiment, the second light has a different chromaticity than the first light.

The control signal generator 122 adds the first light emitted by the first light source 132 and the second light emitted by the second light source 134 by temporally changing the output of at least one of the first light and the second light. The chromaticity of the combined light is continuously and repeatedly changed between the first chromaticity and the second chromaticity. In addition, the control signal generator 122 adds the first light emitted by the first light source 152 and the second light emitted by the second light source 154 by temporally changing the output of at least one of the first light and the second light. The chromaticity of the combined light is continuously and repeatedly changed between the first chromaticity and the second chromaticity. In one specific embodiment, the first chromaticity is chromatic and the second chromaticity is achromatic, or a color closer to achromatic than the first chromaticity. “Continuous” may be continuous to the extent that it can be recognized by the human eye, and may include discontinuous points that cannot be recognized by the human eye. "Repetition" means, for example, that the change in chromaticity is repeated multiple times.

The first light source 132 and the second light source 134 are, for example, R (red) W (white), G (green) W, B (blue) W, RG, YB, and the like. 2 Emit light. For example, the first light source 132 emits a first R light and the second light source 134 emits a second W light. More specifically, the first light source 132 and the second light source 134 are used within the white basic color name area (equal energy white chromaticity MacAdam ellipse 25-step ellipse formula centered at : center coordinates (0.333, 0.333), major axis a (0.059), minor axis b (0.024), inclination of major axis to x-axis θ (deg) (59)) and a monochromatic light emitting diode. More preferably, in the vicinity of isoenergetic white chromaticity recognized as white in non-dimming (steady state) (MacAdam ellipse 5-step ellipse formula: center coordinates (0.333, 0.333), semimajor axis a (0.012), A light-emitting element that emits light with a minor radius b (0.005) and an inclination θ (deg) (59) of the major axis with respect to the x-axis, and a monochromatic light-emitting diode. The description in this 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 .

Lighting device 130 and lighting device 150 may include three groups of LEDs (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 (dominant wavelength λ _d : 610 nm), G (dominant wavelength λ _d : 530 nm), and B (dominant wavelength λ _d : 450 nm). respectively.

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

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

FIG. 1B is a diagram illustrating an example implementation of lighting devices 130 and 150 in space 1B00. The luminaire 130 is typically a low intensity luminaire and may be, for example, a wall light for an entire environment. Lighting device 130 typically produces fluctuations that are not immediately noticeable to the user as a change in light color. Lighting device 130 is also referred to as “ground” (background) lighting.

The lighting device 150 is typically a high-brightness lighting device, and may be, for example, a wall-embedded lighting device, a wall-hung lighting device, or a floor-standing lighting device placed in front of a wall. The lighting device 150 typically generates fluctuations that make the change in light color pleasant (ie, not unpleasant) to the user. The lighting equipment 150 is also called "figure" (accent) lighting.

Here, it is assumed that lighting equipment 130 illuminates the first area and lighting equipment 150 illuminates the second area. In some embodiments, at least a portion of the second region overlaps the first region, and the first region is wider than the second region. Accordingly, by controlling the lighting devices 130 and 150 in the space as "ground" and "figure", it is possible to make the user feel a greater spatial fluctuation without discomfort.

In some embodiments, 50% or more of the second region overlaps the first region. As a result, it is possible to provide spatial recognition that does not give the user a sense of incongruity. In some embodiments, the first area is at least 1.2 times the second area. This allows the user to recognize a reasonable difference between the “ground” lighting device 130 and the “figure” lighting device 150 .

FIG. 1C is a diagram showing a path L130, which is the trajectory of the moving points of the combined light of the lighting device 130, and a path L150, which is the trajectory of the moving points of the combined light of the lighting device 150. FIG. The control signal generator 122 temporally changes the combined light obtained by combining the first light emitted by the first light source 132 and the second light emitted by the second light source 134 of the lighting device 130 so as to follow the path L130. The control signal generator 122 temporally changes the combined light obtained by combining the first light emitted by the first light source 152 and the second light emitted by the second light source 154 of the lighting device 150 so as to follow the path L150. In a space where light from a plurality of lighting devices overlaps, it is necessary to control the hue and saturation of the light color of each lighting device. The temporal change in light color shown in FIG. 1C can provide the user with an effective sense of color tone fluctuation.

--Trajectory of combined light emitted by the lighting equipment in the "figure"--
In some embodiments, control signal generator 122 causes the combined light of lighting device 150 to follow any one of paths 330, 430, 530, 630, 730, 830 described below instead of path L150. change over time to Specifically, in one embodiment, lighting device 150, acting as a "figure" (accent), includes a first light source 152 that emits a first light and a second light source 152 that emits a second light having a different chromaticity than the first light. Two light sources 154 are included. The controller 120 temporally changes the output of each of the first light and the second light, thereby temporally changing the stimulation purity and brightness of the combined light that is the sum of the lights emitted by the light sources 152 and 154. configured as follows. In a coordinate system with variables of stimulus purity and brightness, the moving points representing the stimulus purity and brightness of the combined light are different from each other: the first point, the second point, the third point, and the path connecting the first points. , the first point, the second point, the third point, and the first point. As a result, lighting device 150, which is the “figure”, can provide more effective color tone fluctuations to the user. In this case, lighting equipment 130 moves on L130.

In some embodiments, control signal generator 122, in addition to controlling the sum light of lighting device 150, directs the sum light of lighting device 130 to paths 330, 430, 530, 630, 730, described below, instead of path L130. , 830 in time. Thereby, the user can feel the fluctuation of the "ground" in addition to the fluctuation of the "figure".

The control signal generator 122 changes the cycle in which the movement point returns from the first point to the first point via the second and third points according to the tempo of the music. As a result, 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 representing the variation of the excitation purity S (vertical axis) of the summed light of lighting device 130 versus time T (horizontal axis) and the stimulation purity S of the summed light of lighting device 150 versus time T (horizontal axis). 1D50 is a graph showing plot 1D50 representing changes in (vertical axis); As will be described later, a similar plot is obtained when the vertical axis of FIG. 1D represents luminance. In FIG. 1D, the stimulus purity S (or brightness) of the summed light of lighting device 130 gradually decreases with periodic changes, and the stimulus purity S (or brightness) of the summed light of lighting device 150 decreases monotonically.

In some embodiments, the duration of the step change in luminance or excitation purity of lighting device 130 is greater than the duration of the step change in luminance or stimulation purity of lighting device 150 . The “time width of step change in luminance” refers to the time width required for the luminance of the combined light from the lighting equipment to change by the minimum step that can be recognized by the human eye. The term “time width of step change in excitation purity” refers to the time width required for the excitation purity of the summed light of the lighting equipment to change by the minimum step perceivable by the human eye. The time width of the step change in plot 1D30 is greater than the time width of the step change in plot 1D50. That is, plot 1D30 changes more slowly than plot 1D50. This allows the user to recognize a reasonable difference between the “ground” lighting device 130 and the “figure” lighting device 150 .

Assuming that the vertical axis in FIG. 1D represents luminance, plots 1D30 and 1D50 representing luminance changes for lighting devices 130 and 150 may be the same as the plots for excitation purity. In some embodiments, the brightness of lighting device 130 is less than the maximum brightness during one period of brightness change of lighting device 150 . For example, plot 1D30 takes values less than envelope 1D50e corresponding to the maximum brightness during one period of plot 1D50. This allows the user to recognize a reasonable difference between the “ground” lighting device 130 and the “figure” lighting device 150 .

FIG. 1E shows a plot 1E30 representing the change in the excitation purity S (vertical axis) of the summed light of lighting device 130 versus time T (horizontal axis) and the stimulation purity S of the summed light of lighting device 150 versus time T (horizontal axis). 1E50 is a graph showing plot 1E50 representing changes in (vertical axis); As noted above, a similar plot results when the vertical axis of FIG. 1E represents luminance. In FIG. 1E, the stimulus purity S (or brightness) of the summed light of the lighting device 130 gradually increases while changing periodically, and the stimulus purity S (or brightness) of the summed light of the lighting device 150 increases monotonically.

In the case of FIG. 1E as well, the time width of the step change in luminance or excitation purity of lighting device 130 is greater than the time width of the step change in luminance or excitation purity of lighting device 150, as described above. This allows the user to recognize a reasonable difference between the “ground” lighting device 130 and the “figure” lighting device 150 . Further, the luminance 1E30 of the lighting device 130 is smaller than the maximum luminance 1E50e of the lighting device 150 during one period of luminance change. This allows the user to recognize a reasonable difference between the “ground” lighting device 130 and the “figure” lighting device 150 .

FIG. 1F shows a plot 1F30 representing the change in the excitation purity S (vertical axis) of the summed light of lighting device 130 versus time T (horizontal axis) and the stimulation purity S of the summed light of lighting device 150 versus time T (horizontal axis). 1F50 is a graph showing a plot 1F50 representing changes in (vertical axis); As noted above, a similar plot results when the vertical axis of FIG. 1F represents luminance. In FIG. 1F, the amplitude fluctuates while the stimulation purity S (or luminance) of the summed light of lighting device 130 changes periodically, and the stimulation purity S (or luminance) of the summed light of lighting device 150 changes periodically. Change. That is, the luminance and excitation purity of lighting device 150 change periodically, and the luminance of lighting device 130 changes in proportion to the maximum luminance during one period of luminance change of lighting device 150 . This allows the user to recognize the harmony between the “ground” lighting device 130 and the “figure” lighting device 150 .

In the case of FIG. 1F as well, the duration of the step change in luminance or excitation purity of lighting device 130 is greater than the duration of the step change in luminance or excitation purity of lighting device 150, as described above. This allows the user to recognize a reasonable difference between the “ground” lighting device 130 and the “figure” lighting device 150 . Further, the luminance 1F30 of the lighting device 130 is smaller than the maximum luminance 1F50e of the lighting device 150 during one cycle of luminance change. This allows the user to recognize a reasonable difference between the “ground” lighting device 130 and the “figure” lighting device 150 .

FIG. 1G shows a plot 1G30 representing the change in the excitation purity S (vertical axis) of the summed light of lighting device 130 versus time T (horizontal axis) and the stimulation purity S of the summed light of lighting device 150 versus time T (horizontal axis). 1G50 is a graph showing plot 1G50 representing changes in (vertical axis); As noted above, a similar plot results when the vertical axis of FIG. 1G represents luminance. In FIG. 1G, the stimulation purity S (or luminance) of the summed light of lighting device 130 varies periodically, but its amplitude is constant, and the stimulation purity S (or luminance) of the summed light of lighting device 150 is also constant. be.

In the case of FIG. 1G, as described above, the time width of the step change in luminance or excitation purity of lighting device 130 is greater than the time width of the step change in luminance or excitation purity of lighting device 150 . This allows the user to recognize a reasonable difference between the “ground” lighting device 130 and the “figure” lighting device 150 . Further, the luminance 1G30 of the lighting device 130 is smaller than the maximum luminance 1G50e of the lighting device 150 during one cycle of luminance change. This allows the user to recognize a reasonable difference between the “ground” lighting device 130 and the “figure” lighting device 150 .

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

-- Comparison over time (pattern change perception) --
Color discrimination is determined by wavelength discrimination (single wavelength nm), purity discrimination (line segment connecting white and spectral color (single wavelength color), determined by ratio from white point, spectral color is 100%, isoenergetic white is 0%), and color discrimination (including hue and purity). As for the simultaneous color comparison and the temporal comparison, the color discrimination ability by memory increases about twice as much as the discrimination threshold compared to the case of juxtaposing two colors at the same time.

FIG. 1H is a diagram showing temporal characteristics of color discrimination over time. In the experiment, the test wavelength (λt) and the comparison wavelength (λc) were presented over time, and the constant method (presented a number of times in random order, and asked to determine the existence or nonexistence of the color difference, so to speak). 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 from 0 s to 220 ms in a short time range. FIG. 1H shows the results of measuring the wavelength discrimination threshold Δλ while changing the presentation duration D as a parameter to 55 ms (black triangles), 110 ms (black circles, white circles), and 220 ms (black squares). Regardless of the presentation duration D, the wavelength discrimination value (Δλ) becomes a substantially constant value when the SOA is 200 ms, and the wavelength discrimination performance hardly deteriorates. Therefore, it is preferable to change the light color in a time of 200 ms or less to make the change easily noticeable, and to change the light color in a time of 200 ms or more to make the change difficult to notice.

In addition, there is a transitional peak in the rise of brightness sensation when light hits the retina, and then it settles down. FIG. 1I is a diagram showing the variation of discrimination threshold numbers with time for colors of different wavelengths. FIG. 1I shows the fact that the ability to discriminate colors decreases for short periods of time when the perception of brightness is low, and conversely, when the stimulus is viewed for a few seconds, the effect of chromatic adaptation in turn reduces the ability to gaze for longer periods of time. Shows the fact that with fatigue, discriminative ability declines. Therefore, it is preferable to use 0.2s (=200ms) as SOA. That is, in some embodiments, the duration of the step change in luminance or excitation purity of lighting device 130 is greater than 200 ms, and the duration of the step change in luminance or excitation purity of lighting device 150 is less than or equal to 200 ms. This makes it easier for the user to recognize the difference between the lighting device 130 that is background lighting and the lighting device 150 that is accent lighting.

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

FIG. 1K is a diagram showing MacAdam's color discrimination ellipse. The color discrimination threshold is defined by MacAdam's color discrimination ellipse. Therefore, a color difference equal to or greater than Step 1 should be provided with the light color of the background as the center.

-- Chromatic Adaptation --
If you continue to look at the same color, the color may appear to fade. In addition, it is said that the chromaticity sensed by white light also shifts from the vicinity of equal-energy white to the adaptive light side. Therefore, if a highly saturated light color is used for the "background", the sensitivity to color tone fluctuations of the "picture" may decrease. Also, if a complementary color is used for the "background", it straddles the white point, so that it is difficult to perceive the white color of the "drawing", which may cause a problem that it is difficult to give a so-called achromatic feeling.

FIG. 1L is a diagram illustrating the preferred relationship between hue and excitation purity for the “ground” (background) lighting device 130 and the “figure” (accent) lighting device 150 . In some embodiments, the hue angle difference between the hue of lighting device 130 and the hue of lighting device 150 is 90 degrees or less, and the excitation purity of lighting device 150 is greater than the excitation purity of lighting device 130 . As a result, the saturation change range in which the chromaticity value sensed by white light is on the side of the first light color 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 with the combined light of the lighting device 130 or the combined light of the lighting device 150 .

Also, a color with a hue angle difference of 30 to 60 degrees with respect to the reference hue on the color wheel is called a similar hue. can be felt without discomfort. Therefore, by setting the hue angle difference of the lighting device 150 to 60 degrees or less with respect to the lighting device 130 hue, the difference in color between the background and the drawing can be felt more comfortably.

--Chromaticity change of total light--
FIG. 2 is a diagram showing the chromaticity change 200 of the combined light that changes between the first light and the second light. Point 201 represents isoenergetic white. A region 202 represents the region with the basic color name “white”. The control signal generator 122 varies the combined light 210 such that it continuously oscillates between, for example, a first chromaticity 211 of the first light and a second chromaticity 212 of the second light. That is, the combined light 210 changes from the first chromaticity 211 to the second chromaticity 212 and then 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. A continuous change in chromaticity is preferred to improve the user's relaxation 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 pale blue light that is not white.

Combined light 210 is not limited to blue-based colors, and may be any suitable color. For example, the combined light 220 may be changed to continuously oscillate 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 Luminance Change Patterns of Combined Light--
Light can generally be represented by brightness and color. Specifically, brightness is defined by luminance, and color is defined by chromaticity. Chromaticity is further defined by hue and excitation purity. Among these light parameters, the control signal generator 122 varies the stimulus purity and brightness of the sum light in a pattern detailed below.

--Pattern 1--
FIG. 3 shows the stimulus purity of the summed light 310, the brightness of the summed light 320, and the path 330, the locus of moving points obtained as an ordered pair of the stimulus purity and brightness of the summed light. Time t1 to t2 is called period P1, time t2 to t3 is called period P2, and time t3 to t4 is called period P3. Times t1, t2, t3, and t4 correspond to first point 331, second point 332, third point 333, and first point 331 on path 330, respectively.

The control signal generator 122 temporally converts the excitation purity and luminance of the combined light of the first light emitted by the first light source 132 and the second light emitted by the second light source 134 into the excitation purity 310 and the luminance 320. change. In a coordinate system in which the stimulus purity and luminance are variables, the moving point representing the stimulus purity and luminance of the combined light is 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 in order.

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

In the present disclosure, periods P1, P2, and P3 correspond to the three modes of breathing, inhalation, hold, and exhalation, respectively. It can be said that the combined light according to the pattern 1 in FIG. 3 is bright during the period P1, vivid during the period P2, and very dark during the period P3. For this reason, there are many bright and vivid state change steps, and it is easy to feel a sense of expansion. Because it brightens rapidly, it is suitable for breathing changes that stop short inhalation and lengthen exhalation.

--Pattern 2--
FIG. 4 is a diagram showing summed light stimulus purity 410, summed light intensity 420, and path 430, a locus of moving points obtained as an ordered pair of summed light stimulus purity and summed light intensity. Time t1 to t2 is called period P1, time t2 to t3 is called period P2, and time t3 to t4 is called period P3. Times t1, t2, t3, and t4 correspond to first point 431, second point 432, third point 433, and first point 431 on path 430, respectively.

The control signal generator 122 temporally converts the excitation purity and luminance of the combined light of the first light emitted by the first light source 132 and the second light emitted by the second light source 134 into a stimulation purity 410 and a luminance 420. change. In a coordinate system in which the stimulus purity and luminance are variables, the moving point representing the stimulus purity and luminance of the combined light is 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 in order.

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

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

--Pattern 3--
FIG. 5 shows summed light stimulus purity 510, summed light intensity 520, and path 530, a locus of moving points obtained as an ordered pair of summed light stimulus purity and summed light intensity. Time t1 to t2 is called period P1, time t2 to t3 is called period P2, and time t3 to t4 is called period P3. Times t1, t2, t3, and t4 correspond to first point 531, second point 532, third point 533, and first point 531 on path 530, respectively.

The control signal generator 122 temporally converts the excitation purity and luminance of the combined light of the first light emitted by the first light source 132 and the second light emitted by the second light source 134 into a stimulation purity 510 and a luminance 520. change. In a coordinate system in which the stimulus purity and brightness are variables, the moving point representing the stimulus purity and brightness of the combined light is on the path connecting the first point 531, the second point 532, the third point 533, and the first point 531. , the first point 531, the second point 532, the third point 533, and the first point 531 in order.

In the path 530, the excitation purity 510 and the luminance 520 monotonously increase 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 excitation purity 510 is constant and the luminance 520 monotonously decreases. In the period from the third point 533 to the first point 531 (period P3), the excitation purity 510 monotonously decreases and the luminance 520 is constant.

It can be said that the combined light according to pattern 3 in FIG. 5 is bright during the period P1, dark during the period P2, and very dark during the period P3. For this reason, there are many dark and dull state change steps, and it is easy to feel contraction. Because it darkens rapidly, it is suitable for rapid contraction movements.

--Pattern 4--
FIG. 6 shows summed light stimulus purity 610, summed light intensity 620, and path 630, a locus of moving points obtained as an ordered pair of summed light stimulus purity and summed light intensity. Time t1 to t2 is called period P1, time t2 to t3 is called period P2, and time t3 to t4 is called period P3. Times t1, t2, t3, and t4 correspond to first point 631, second point 632, third point 633, and first point 631 on path 630, respectively.

The control signal generator 122 temporally converts the excitation purity and luminance of the combined light of the first light emitted by the first light source 132 and the second light emitted by the second light source 134 to the excitation purity 610 and the luminance 620. change. In a coordinate system in which the stimulus purity and brightness are variables, the moving point representing the stimulus purity and brightness of the combined light is 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 in order.

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

It can be said that the combined light according to the pattern 4 in FIG. 6 is bright during the period P1, grayish during the period P2, and very dark during the period P3. For this reason, there are many dark and dull state change steps, and it is easy to feel contraction. The light gradually darkens, making it easy to feel a calm atmosphere, making it suitable for slow breathing before going to bed.

In patterns 1 to 4, one of excitation purity and luminance takes a constant value at two of the first, second, and third points. In particular, the period P2 between time t2 and time t3 corresponding to the second and third points corresponds to the breath-hold mode. That is, in the breath-hold mode, one of the stimulus purity and brightness is constant, making it easier for the user to perceive the three modes of breathing.

--Pattern 5 (variation of patterns 1 to 4)--
FIG. 7 shows the stimulus purity of the summed light 710, the brightness of the summed light 720, and the path 730, the locus of moving points obtained as an ordered pair of the stimulus purity and brightness of the summed light. Time t1 to t2 is called period P1, time t2 to t3 is called period P2a, time t3 to t4 is called period P2b, and time t4 to t5 is called period P3. Times t1, t2, t3, t4, and t5 correspond to first point 731, second point 732, third point 733, second point 732, and first point 731 on path 730, respectively.

The control signal generator 122 temporally converts the excitation purity and luminance of the combined light of the first light emitted by the first light source 132 and the second light emitted by the second light source 134 to the excitation purity 710 and the luminance 720. change. In a coordinate system in which the stimulus purity and luminance are variables, the moving point representing the stimulus purity and luminance of the combined light is the first point 731 , second point 732, third point 733, second point 732, and first point 731 in order.

In the path 730, the excitation purity 710 and the luminance 720 monotonously increase 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 excitation purity 710 monotonously increases and the luminance 720 is constant. During the period from the third point 733 to the second point 732 (period P2b), the excitation purity 710 monotonously decreases and the luminance 720 is constant. In the period from the second point 732 to the first point 731 (period P3), the excitation purity 710 and the brightness 720 monotonously decrease.

Pattern 5 is a modification of pattern 1 . The combined light by pattern 5 is easy for the user to be aware of the mode of stopping in the periods P2a and P2b. A pattern such as pattern 5 in which periods P2a and P2b reciprocate in the same path is not limited to application to pattern 1, and may be applied to other patterns 2-4.

--Pattern 6 (Path edges are curved)--
FIG. 8 shows the stimulus purity of the summed light 810, the brightness of the summed light 820, and the path 830, which is the locus of moving points obtained as an ordered pair of the stimulus purity and brightness of the summed light. Time t1 to t2 is called period P1, time t2 to t3 is called period P2, and time t3 to t4 is called period P3. Times t1, t2, t3, and t4 correspond to first point 831, second point 832, third point 833, and first point 831 on path 830, respectively.

The control signal generator 122 temporally converts the excitation purity and luminance of the combined light of the first light emitted by the first light source 132 and the second light emitted by the second light source 134 into a stimulation purity 810 and a luminance 820. change. In a coordinate system in which the stimulus purity and luminance are variables, the moving point representing the stimulus purity and luminance of the combined light is on the path connecting the first point 831, the second point 832, the third point 833, and the first point 831. , the first point 831, the second point 832, the third point 833, and the first point 831 in order.

In the path 830, the excitation purity 810 and the luminance 820 monotonously increase 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 excitation purity 810 monotonously increases, the luminance 820 increases in the first half, reaches a maximum value, and then decreases in the second half. In the period from the third point 833 to the first point 831 (period P3), the excitation purity 810 and the luminance 820 decrease monotonically.

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

Additionally, the paths of adjacent periods may be connected substantially smoothly. For example, at the second point 832, the path of period P1 and the path of period P2 may be connected substantially smoothly without forming a sharp point. As used herein, "substantially smooth" means that the combined light is perceived as smooth to the user's eye, and is not interpreted as excluding minute sharp points. Here, a sharp point in the path can be caused by a stepwise (ie discrete) change in stimulus purity or brightness. Note that depending on the hue, the amount of change in stimulus purity or brightness perceivable by the user changes. Thus, in hues to which the user is less sensitive, even larger sharp points can appear smooth to the user.

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

--change of cycle--
FIG. 9 is a diagram showing the summed light excitation purity 910 and summed light luminance 920 . The control signal generator 122 temporally converts the excitation purity and luminance of the combined light of the first light emitted by the first light source 132 and the second light emitted by the second light source 134 to the excitation purity 910 and the luminance 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 periods P1 to P3 is defined as periods PT1, PT2, PT3, . . . , PTi (i=natural number). In an embodiment using the pattern of FIG. 9, the period PTi increases over time. This makes it easier for the user to feel the gradual calming down.

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

In some 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 with the lighting control system 100, the period PTi can be set to a value appropriate to the tempo of the music being played. As a result, the user can feel the change in the total light combined with the music, and can more easily feel the three modes of breathing and feel more relaxed.

--Intro period, Outro period--
For example, the main period is the period in which the stimulation purity and brightness of the combined light are changed in the patterns shown in FIGS. In the main period, by using patterns 1 to 4, etc. described above, for example, the user can relax while clearly recognizing the three modes of breathing. This main period may be preceded by an intro period as a preliminary period for the introduction. After this main period, an outro period may be placed as a preliminary period for calming down. During the intro and outro periods, the user may use patterns that are not particularly conscious of the breath-holding aspect. This allows the user to more effectively recognize the presence of the stop mode in the main period.

Hardware FIG. 10 is a block diagram showing the structure of control signal generator 122 . Control signal generator 122 includes processor 1010 , memory 1020 , and input/output unit 1030 . Processor 1010 performs processing to provide chromaticity changes to the outputs of lighting device 130 and lighting device 150, for example, as shown in FIG. Memory 1020 stores instructions and parameters used in the operations performed by processor 1010 . The input/output unit 1030 generates controls based on the output of the processor 1010 and outputs them to the lighting controller 124 . Input/output unit 1030 may be incorporated within processor 1010 .

The control signal generator 122 and the lighting controller 124 may be implemented as one element (eg, semiconductor chip). Alternatively, the control signal generator 122 and the lighting controller 124 may be provided in one housing.

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

The apparatus, system, or method subject of this disclosure comprises a computer (eg, control signal generator 122). This computer executes the program (eg, algorithm 900) to implement the main functions of the apparatus, system, or method of the present disclosure. A computer has a processor that operates according to a program as a main hardware configuration. Any type of processor can be used as long as it can implement functions by executing a program. The processor is composed of one or more electronic circuits including a semiconductor integrated circuit (IC) or LSI (large scale integration). A 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 into one device, or may be provided in a plurality of devices. The program is recorded in a non-temporary recording medium such as a computer-readable ROM, optical disk, hard disk drive, or the like. The program may be pre-stored in a recording medium, or may be supplied to the recording medium via a wide area network including the Internet.

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 comprising 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 is
a control signal generator for generating a first control signal for controlling the first lighting device and a second control signal for controlling the second lighting device; and illumination of the first lighting device based on the first control signal. and a driver that controls irradiation of the second lighting device based on the second control signal,
at least a portion of the second region overlaps the first region;
The first region is wider than the second region,
The time width of the step change in luminance or stimulation purity of the first lighting device is greater than the time width of the step change in luminance or stimulation purity of the second lighting device,
The lighting control system, wherein the brightness of the first lighting device is less than the maximum brightness in one cycle of the brightness change of the second lighting device. The time width of the step change in luminance or excitation purity of the first lighting device is longer than 200 ms, and the time width of the step change in luminance or excitation purity of the second lighting device is 200 ms or less. A lighting control system as described. 2. The lighting control system of claim 1, wherein 50% or more of the second area overlaps the first area. 2. The lighting control system of claim 1, wherein the first area is 1.2 times or more the second area. the brightness and excitation purity of the second lighting device are periodically varied;
2. The lighting control system according to claim 1, wherein the brightness of said first lighting device changes in proportion to the maximum brightness in one cycle of brightness variation of said second lighting device. A hue angle difference between the hue of the first lighting device and the hue of the second lighting device is 90 degrees or less,
2. The lighting control system of claim 1, wherein the excitation purity of the second lighting device is greater than the excitation 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 different chromaticity than the first light;
The controller temporally varies the output of each of the first light and the second light, thereby temporally changing the excitation purity and brightness of the combined 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 excitation purity and the luminance are variables, the moving points representing the excitation purity and the luminance of the combined light are different from each other: the first point, the second point, the third point, and the first point. 2. The lighting control system according to claim 1, wherein the first point, the second point, the third point, and the first point are moved in this order on a path connecting points. 3. The control signal generator changes a cycle of the movement point from the first point to the first point via the second point and the third point according to the tempo of music. 8. The lighting control system according to 7.

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