JP2022095790A - Lighting device, lighting system, control device and control method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a lighting device for adjusting a respiration rhythm utilizing variation from monochromatic light to achromatic light, and provide a control device and a control method.

SOLUTION: A lighting device includes: a plurality of light sources containing at least a first light source emitting first light and a second light source emitting second light having chromaticity different from that of the first light; and a control part temporally changing output of at least one of the first light and the second light. The control part continuously and repeatedly changes the chromaticity of added light obtained by adding lights emitted from the plurality of light sources between first chromaticity and second chromaticity having excitation purity lower than that of the first chromaticity.

SELECTED DRAWING: Figure 1

COPYRIGHT: (C)2022,JPO&INPIT

Description

The present disclosure relates to a lighting device and a control device and a control method used for lighting.

There is known a method of facilitating the user to adjust the breathing rhythm by changing the brightness of the illumination light at a frequency close to the breathing rhythm.

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

However, in the above-mentioned background techniques, only blinking of monochromatic light or change from one monochromatic color to another monochromatic color is used. Conventional techniques do not use achromatic light. Therefore, there is a problem that it is difficult for the user to imagine gray from achromatic light when exhaling and to relax. This problem was found by the inventors of the present application.

In certain embodiments, the illuminating device comprises a plurality of light sources including at least 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, and at least the first light. The control unit includes a control unit that changes the output of one of the light and the second light with time, and the control unit determines the chromaticity of the total light obtained by adding the lights emitted by the plurality of light sources into the first chromaticity. And the second chromaticity, which has a lower stimulus purity than the first chromaticity, are continuously and repeatedly changed.

In one embodiment, the lighting system comprises a first lighting device, which is the lighting device, and a second lighting device, which is the lighting device, wherein the second lighting device continuously increases the chromaticity of the total light. The control unit of the second lighting device has a receiver that receives a signal associated with the timing of repeatedly changing the light from the first lighting device, and the control unit of the second lighting device responds to the received signal by the total light. The chromaticity of is continuously and repeatedly changed.

In certain embodiments, the control device comprises a control unit that generates a control signal that temporally changes the output of at least one of the first light emitted by the first light source and the second light emitted by the second light source. The control unit includes a drive unit that drives at least one of the first light source and the second light source according to a control signal, and the control unit is a chromaticity of the total light including the first light and the second light. Is continuously and repeatedly changed between the first chromaticity and the second chromaticity having a lower stimulus purity than the first chromaticity.

In one embodiment, the control method is a control method that temporally changes the output of at least one of the first light emitted by the first light source and the second light emitted by the second light source, wherein the first light is emitted. And a step of continuously and repeatedly changing the chromaticity of the totaled light including the second light between the first chromaticity and the second chromaticity having a lower stimulus purity than the first chromaticity. including.

Provided are a lighting device, a lighting system, a control device, and a control method for adjusting a respiratory rhythm using a change from monochromatic light to achromatic light.

It is a block diagram of a lighting device. 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 change of the chromaticity preferable for reducing the discomfort of the complementary color afterimage of a user. It is a figure which shows the chromaticity change between the 1st chromaticity and the 2nd chromaticity of the total light of a light source in a certain embodiment. It is a figure which shows the chromaticity change between the 1st chromaticity and the 2nd chromaticity of the total light of a light source in a certain embodiment. It is a figure which shows the chromaticity change between the 1st chromaticity and the 2nd chromaticity of the total light of a light source in a certain embodiment. It is a figure which shows the chromaticity difference change between the chromaticity of the total light of a light source, and the chromaticity of the second chromaticity. It is a block diagram which shows the structure of a control part. It is a flow diagram which shows the algorithm of the process which gives the chromaticity change to the output of a light source. It is a figure which shows the amplitude and the period of the periodic change of the stimulus purity of total light. It is a figure which shows the amplitude and the period of the periodic change of the stimulus purity of total light. It is a figure which shows the amplitude and the period of the periodic change of the stimulus purity of total light.

Schematic FIG. 1 is a block diagram of the lighting device 100. The lighting device 100 includes an input device 110, a control device 120, and a light source 130. The control device 120 includes a control unit 122 and a drive unit 124.

The lighting device 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 device 100 gives the user a feeling of relaxation and makes it easy to match the rhythm of repeated breathing by the temporal fluctuation of the chromaticity of the light of the light source 130. The illuminator 100 is typically located in the vicinity where the indoor user is trying to relax.

The input device 110 transmits the operation parameters of the lighting device 100 selected by the user to the control unit 122. Such operating parameters represent, for example, the on / off of the illuminating device 100 and the period of time change in the chromaticity of the light of the illuminating device 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 device 100, or may be provided in a housing separate from the lighting device 100. In the former case, the input device 110 is connected to the control unit 122 by wiring provided in the housing. In the latter case, the input device 110 is wirelessly coupled to the control unit 122. Wireless coupling is achieved, for example, by transmission of operating parameters by infrared light or electromagnetic waves.

The control unit 122 generates a control signal that temporally changes the chromaticity of the light emitted from the light source 130, and sends the control signal to the drive unit 124. The control unit 122 is realized by, for example, a processor and a memory, and realizes a control method described later.

The drive unit 124 receives a control signal from the control unit 122 and drives the light source 130. The drive unit 124 changes the chromaticity of the light emitted from the light source 130 with time based on the control signal. The drive unit 124 changes the output of the light source 130 by, for example, pulse width modulation (PWM).

The light source 130 is, for example, a light emitting diode (LED). In one embodiment, the light source 130 comprises a group of LEDs. In the embodiment of FIG. 1, the light source 130 includes a first light source 132 and a second light source 134. It is assumed that the first light source 132 emits the first light and the second light source 134 emits the second light. In this embodiment, the second light has a chromaticity different from that of the first light.

The control unit 122 changes the output of at least one of the first light and the second light with time to add up the first light emitted by the first light source 132 and the second light emitted by the second light source 134. The chromaticity of is continuously and repeatedly changed between the first chromaticity and the second chromaticity having a lower stimulus purity than the first chromaticity. 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. With this configuration, the lighting device 100 has an effect that the user can adjust the breathing according to the light source 130 whose chromaticity changes between chromatic color and achromatic color. 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 one combination 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.

The light source 130 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 (main wavelength λ _d : 610 nm), G (main wavelength λ _d : 530 nm), B (main wavelength λ _d : 450 nm). Is emitted respectively.

The light source 130 may include four groups of LEDs (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 light source, the second light source, the third light source, and the fourth light source are, for example, R (main wavelength λ _d : 620 nm), Y (yellow) (main wavelength λ _d : 570 nm), G (main wavelength λ d: 570 nm). Wavelength λ _d : 525 nm) and B (main wavelength λ _d : 460 nm) are emitted, respectively.

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

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 equal energy white. The area 202 represents the area of the basic color name "white" defined by the JIS Z 8110-1995 color display method-the color name of the light source color. The control unit 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 user takes in the total light 210 in the vicinity of the first chromaticity 211 (chromatic color) and exhales in the vicinity of the second chromaticity 212 (achromatic color). Therefore, the respiratory rhythm can be synchronized without discomfort by repeatedly changing the perceptual achromatic color (exhalation) and the chromatic color (inspiration). In other words, it is possible to induce the respiratory rhythm by changing the color.

Relaxing the user by utilizing the change from chromatic light to achromatic light is a newly discovered finding by the present inventors, which has not been known in the past. In the present specification, the achromatic color is not limited to the case where the saturation is zero, and means a color that does not make the user feel the saturation sufficiently as compared with the chromatic color.

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.

In the following description, the point 211 is used as the first chromaticity of the first light, and the point 212 of FIG. 2 is used as the second chromaticity of the second light, but the chromaticity is not limited to the blue system and is arbitrary. Appropriate chromaticity can be used.

When the second light 212 enters a region sufficiently close to the point 201, the user may feel a complementary color afterimage of the first light 211 (complementary color afterimage in achromatic light). This can interfere with the user adjusting the breathing rhythm to the light source 130. The inventors of the present application have found a sense of discomfort due to such a complementary color afterimage as a problem. For example, with respect to the first chromaticity 212, the second chromaticity 212 is outside the white basic color name region circle 202 defined in JIS Z8110-1995. Here, the white basic color name region circle 202 defined in JIS Z8110-1995 is defined as MacAdam ellipse 25 steps, elliptical: center coordinates (0.3333, 0.3333), semi-major axis a (0.058675), semi-minor axis b ( 0.02405), defined by the inclination θ (deg) (58.984) of the major axis with respect to the x-axis. By changing the chromaticity of the total light 210 emitted by the light source 130 in this way, there is an effect that the discomfort of the complementary color afterimage felt by the user can be reduced.

In another embodiment, the second chromaticity 212 is closer to the first chromaticity 211 in the MacAdam ellipse by at least three steps than the chromaticity of the equal energy white point 201. Even with this method, when the change from the first light 211 to the second light 212 is slow, the user's feeling of discomfort in the complementary color afterimage can be reduced.

Fluctuation fluctuations The chromaticity and achromatic color (white) that start to feel the complementary color when the fluctuation changes from the chromatic color (red, green, and blue) to the achromatic color (iso-energy white, about 5500K). ) Is calculated. The chromaticity is as shown in Table 1, the brightness of the gazing point is constant at 30 cd / m2, and the fluctuation frequencies are about 0.03 Hz (33 second cycle), 0.1 Hz (10 second cycle), and 0.3 Hz (3. There are 3 levels (3 second cycle). Stimulation purity is defined by JIS Z 8113 lighting term-03073, and is expressed here as a percentage multiplied by 100.

The simple study experiment is performed as follows.

1. 1. The subject is adapted to the fluctuating state (about 5 minutes).

2. 2. The experimenter gives a signal to the subject to start from the chromatic color point.

3. 3. The subject responds by pressing a button at the time when (1) the complementary color begins to be felt while changing toward the achromatic color.

4. The above steps 2 and 3 are repeated for each color, and the threshold chromaticity is calculated based on the average value. Repeat about 8 times.

Table 2 shows the experimental results.

From the above, it can be seen that the complementary color point approaches the white point as the frequency increases.

In addition, the subjects were asked to answer the complementary color perception chromaticity for the three levels of stimulus purity. In the experiment, light color (3 levels): red (main wavelength λ _d : 615 nm), green (main wavelength λ _d : 505 nm), blue (main wavelength λ _d : 465 nm), for two subjects. Purity (3 levels): 32 to 99, frequency: 0.1 Hz, intensity (brightness of gazing point): 30 cd / m ² . Table 3 shows the presented chromatic chromaticity, and Table 4 shows the experimental results of the chromaticity that began to feel complementary colors.

From the above, it can be seen that the complementary color point approaches the white point as the purity decreases. In the MacAdam ellipse, the complementary color perception chromaticity is a region of 30 steps in the case of green, 25 steps in the case of red, and 20 steps in the case of blue. Therefore, it is preferable to set the chromaticity approaching the white point as the end point outside the MacAdam ellipse region of 20 to 30 steps.

Change in chromaticity between chromatic and achromatic colors FIG. 3 is a diagram showing a change in chromaticity 300 preferable for reducing the discomfort of a user's complementary color afterimage. From the examination results in Tables 2 to 4, it can be seen that there is a difference in the chromaticity at which complementary colors begin to be felt depending on the color. In FIG. 3, the point 301 represents an equal energy white color. For example, in the case of red, the first chromaticity (chromatic color) and the second chromaticity (achromatic color) can be changed within the range 310. In the case of green, the first chromaticity (chromatic color) and the second chromaticity (achromatic color) can be varied within range 320. In the case of blue, the first chromaticity (chromatic color) and the second chromaticity (achromatic color) can be varied within range 330. In either case, if the second chromaticity is too close to the point 301, the user may feel a sense of discomfort in the complementary color afterimage. That is, it is preferable that the second chromaticity is not included in a predetermined region to be described later in the vicinity of the point 301 of the equal energy white color in order to prevent the user from giving a sense of discomfort in the complementary color afterimage.

For color control, the MacAdam ellipses are used as the index that best matches the color difference sensation (see, eg, IEC 60082 Annex D Chromaticity co-ordinates). In one embodiment, for the first chromaticity 211, the second chromaticity 212 is elliptical: center coordinates (0.333,0.333), major radius a (0.047), minor radius b (0.019), major axis. It is outside the white basic color name region circle defined by the tilt θ (deg) (59) with respect to the x-axis. This area corresponds to 20 steps in the MacAdam ellipse. This makes it possible to reduce the discomfort of the complementary color afterimage that the user feels.

More preferably, the second chromaticity 212 has an elliptical type: center coordinates (0.333,0.333), major radius a (0.059), minor radius b (0.024), and x-axis of the major axis, as opposed to the first chromaticity 211. It is outside the white basic color name region circle defined by the slope θ (deg) (59) with respect to. This area corresponds to 25 steps in the MacAdam ellipse. This makes it possible to further reduce the discomfort of the complementary color afterimage that the user feels.

Most preferably, the second chromaticity 212 has an elliptical type: center coordinates (0.333,0.333), major radius a (0.070), minor radius b (0.025), and x-axis of the major axis, as opposed to the first chromaticity 211. It is outside the white basic color name region circle defined by the slope θ (deg) (59) with respect to. This area corresponds to 30 steps in the MacAdam ellipse. As a result, it is possible to further reduce the discomfort of the complementary color afterimage that the user feels for all colors.

FIG. 4 is a diagram showing a chromaticity change 400 between the first chromaticity and the second chromaticity of the total light of the light source 130 in a certain embodiment. Point 401 represents equal energy white, and region 402 is, for example, the MacAdam ellipse described above. The first light source 132 emits light having a first chromaticity 410, and the second light source 134 emits light having a second chromaticity 420. Here, the light intensity of the second light source 134 is fixed (not controlled), and the light intensity of the first light source 132 is changed (controlled). The total light emitted by the light source 130 as a whole can be continuously changed within the range of the first chromaticity 415 to the second chromaticity 420. For example, when the light intensity of the first light source 132 is maximum, the total light has a first chromaticity 415, and when the light intensity of the first light source 132 is zero, the total light has a second chromaticity 420. With such a configuration, the total light can be changed between the chromatic color and the achromatic color without controlling one of the two light sources. That is, if there is at least one light source that changes with time, the chromaticity of the synthetic light is moved on the straight line connecting the chromaticity of the first light and the chromaticity of the second light shown on the chromaticity coordinates. be able to.

FIG. 5 is a diagram showing a chromaticity change 500 between the first chromaticity and the second chromaticity of the total light of the light source 130 in a certain embodiment. Point 501 represents equal energy white, and region 502 is, for example, the MacAdam ellipse described above. The first light source 132 emits light having a first chromaticity 510, and the second light source 134 emits light having a second chromaticity 520. Here, the light intensity of the first light source 132 is fixed (not controlled), and the light intensity of the second light source 134 is changed (controlled). The total light emitted by the light source 130 as a whole can be continuously changed within the range of the first chromaticity 510 to the second chromaticity 515. For example, when the light intensity of the second light source 134 is zero, the total light has a first chromaticity 510, and when the light intensity of the second light source 134 is maximum, the total light has a second chromaticity 515. With such a configuration, the total light can be changed between the chromatic color and the achromatic color without controlling one of the two light sources.

FIG. 6 is a diagram showing a chromaticity change 600 between the first chromaticity and the second chromaticity of the total light of the light source 130 in a certain embodiment. In FIG. 6, the light source 130 has three light sources, a first light source and a third light source. Point 601 represents isobaric white, and region 602 is, for example, the MacAdam ellipse described above. The first light source emits light having a chromaticity of 610, the second light source emits light having a chromaticity of 620, and the third light source emits light having a chromaticity of 630. Here, the light intensity of the first light source to the third light source is changed (controlled). The total light emitted by the light source 130 as a whole can be continuously changed within the range of the first chromaticity 615 to the second chromaticity 616, and continuously within the range of the first chromaticity 625 to the second chromaticity 626. It can be changed from the first chromaticity 635 to the second chromaticity 636. With such a configuration, the total light between the chromatic and achromatic colors in the triangular region formed by the first chromaticity 610, the second chromaticity 620, and the third chromaticity 630 of the light emitted from the three light sources. It is also possible to select the first chromaticity according to the mood.

For example, in one embodiment, the user selects one of 615, 625, and 635 as the first chromaticity and inputs it to the input device 110. The input device 110 receives a first chromaticity selected by the user (eg, 615). In this case, the light source 130 can emit a total light that continuously changes within the range of the selected first chromaticity 615 to the second chromaticity 616. As a result, the lighting device 100 can realize the chromaticity change selected by the user.

In certain embodiments, the intensity at the first chromaticity is greater than the intensity at the second chromaticity in terms of the intensity of the combined light. As a result, the second chromaticity on the achromatic side is felt dark, and the relaxing effect of the user can be improved.

In one embodiment, in the rate of change in chromaticity with respect to time, the rate of change in the vicinity of the first chromaticity is larger than the rate of change in the vicinity of the second chromaticity. By reducing the change in the vicinity of the second chromaticity, which is the achromatic color side in which the user is sensitive to the change in chromaticity, the relaxing effect of the user can be improved.

In one embodiment, the rate of change in the intensity of the total light with respect to time is such that the rate of change in the vicinity of the first chromaticity is greater than the rate of change in the vicinity of the second chromaticity. As a result, the relaxing effect of the user can be improved by reducing the change in the vicinity of the second chromaticity, which is the achromatic color side where the user is sensitive to the change in light intensity.

The "intensity" of the combined light essentially refers to the luminous flux of the light source (with a luminosity factor curve). In some cases, the "intensity" of the total light may refer to the brightness of the light emitting surface (glove, cover, etc.) of the lighting device, or the irradiation surface of the wall. In the present disclosure, these are collectively referred to simply as strength.

FIG. 7 is a diagram showing a chromaticity difference change 700 between the chromaticity of the total light of the light source 130 and the second chromaticity. The chromaticity difference change 700 takes a maximum value when the chromaticity of the total light is equal to the first chromaticity, and the chromaticity difference at that time is the difference between the first chromaticity and the second chromaticity. The chromaticity difference change 700 takes the minimum value when the chromaticity of the total light is equal to the second chromaticity, and the chromaticity difference is 0 at that time. The first cycle of changing from the first chromaticity to the second chromaticity and returning from the second chromaticity to the first chromaticity is T1, the second cycle is T2, and the third cycle is T3. At this time, T1 <T2 <T3. That is, the cycle of continuously and repeatedly changing between the first chromaticity and the second chromaticity increases monotonically. The normal breathing cycle is about 2 to 6 seconds. On the other hand, deep breathing is about 10 seconds. Therefore, for example, by controlling the cycle of chromaticity change to monotonically increase from T1 = 1 second to the nth cycle Tn (n is a positive integer) = 10 seconds, the relaxing effect for the user can be improved.

Hardware FIG. 8 is a block diagram showing the structure of the control unit 122. The control unit 122 includes a processor 810, a memory 820, and an input / output unit 830. The processor 810 executes a process of giving a chromaticity change to the output of the light source 130 as shown in FIG. 2, for example. Memory 820 stores instructions and parameters used for processing performed by processor 810. The input / output unit 830 generates a control based on the output of the processor 810 and outputs the control to the drive unit 124. The input / output unit 830 may be incorporated in the processor 810.

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

Software FIG. 9 is a flow diagram showing an algorithm 900 for processing to apply a chromaticity change (for example, chromaticity change 200) according to the present disclosure to the output of the light source 130. In 910, the processor 810 receives data from the input / output unit 830. This data is, for example, data indicating an operation mode of the lighting device 100 input by the user to the input device 110. At 920, the processor 810 receives data regarding the chromaticity change from the memory 820. At 930, the processor 810 outputs a control signal to the drive unit 124 based on the received data. If necessary, the algorithm 900 may be repeatedly executed by returning control from 930 to 910.

The subject of the device, system, or method in the present disclosure comprises a computer (eg, control unit 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 into 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 a recording medium in advance, or may be supplied to the recording medium via a wide area communication network including the Internet or the like.

Periodic change in stimulus purity of total light FIG. 10 is a diagram showing the amplitude and period of the periodic change in stimulus purity of total light. In FIG. 10, the vertical axis represents stimulation purity and the horizontal axis represents time. In the period a, the difference between the maximum value and the minimum value of the stimulus purity (also simply referred to as “difference in stimulus purity”) is Da, and the cycle of change in the stimulus purity is Ta. In the period b, the difference between the maximum value and the minimum value of the stimulus purity is Db, and the cycle of the change in the stimulus purity is Tb. In one embodiment, the control unit 122 changes the stimulus purity of the total light, for example, as shown in FIG.

In certain embodiments, Ta> Db holds for Ta <Tb with respect to the cycle and difference in the change in stimulus purity. That is, in a period in which the cycle of change in stimulus purity is longer, the difference in stimulus purity is smaller. The human eye is more likely to feel complementary colors when the cycle of change in stimulus purity is long, because the color adaptation of the eye is more advanced than when the cycle is short. By controlling the width of the color change according to the cycle, it is possible to prevent the occurrence of complementary color perception while giving the color change, and to realize more effective support of the respiratory rhythm.

The minimum value of stimulus purity can be equal energy white (achromatic). The maximum value of stimulus purity can be monochromatic light (chromatic). The waveform (pattern) of the periodic change is preferably, but not limited to, the sine wave shown in FIG. The waveform of the periodic change may be, for example, a rectangular wave or a triangular wave, and the rate of change in the stimulus purity increasing direction and the decreasing direction may not be the same.

As in the change from period a to period b in FIG. 10, the change in the stimulus purity of the total light is a monotonous change in the direction in which the cycle becomes longer and the difference in stimulus purity becomes smaller with the passage of time. obtain. Such changes can induce the user's psychological state from a normal state to a more relaxed state (including a sleeping state).

However, the change in the stimulus purity of the total light is not limited to this, and the cycle becomes shorter and the difference in the stimulus purity changes with the passage of time, for example, as in the case of the change from the period b to the period a opposite to that in FIG. It may be a monotonous change in the direction of increasing. Such changes can lead the user's psychological state from a relaxed state to a normal state.

The change in the stimulus purity of the total light may change from the period a to the period b, then return from the period b to the period a again, and then repeat.

FIG. 11 is a diagram showing the amplitude and period of the periodic change in the stimulus purity of the total light. In FIG. 11, the vertical axis represents the stimulus purity and the horizontal axis represents time. In one embodiment, the control unit 122 changes the stimulus purity of the total light, for example, as shown in FIG.

Assuming that the cycles are T1, T2, T3, T4, ... In order from the earliest time in FIG. 11, in FIG. 11, the cycle satisfies T1 ≤ T2 ≤ T3 ≤ T4 ..., and the difference in stimulation purity is D1 ≥ D2. ≧ D3 ≧ D4 ... That is, the cycle increases monotonically and the difference in stimulus purity decreases monotonically. Here, "monotonically increasing" and "monotonically decreasing" include the case where the value does not change locally (for example, T1 = T2, D1 = D2). According to the periodic change in the stimulus purity of the total light of FIG. 11, the user's psychological state can be induced from the normal state to the more relaxed state.

FIG. 12 is a diagram showing the amplitude and period of the periodic change in the stimulus purity of the total light. In FIG. 12, the vertical axis represents the stimulus purity and the horizontal axis represents time. In one embodiment, the control unit 122 changes the stimulus purity of the total light as shown in FIG. 12, for example. In FIG. 12, the period Ti takes a value in a range suitable for human respiration. For example, the period Ti may have a minimum value of about 3 seconds and a maximum value of about 12 seconds.

In the various embodiments described above, the control unit 122 controls the light source 130 so that the higher the stimulus purity of the total light (closer to the first chromaticity), the higher the intensity of the total light. Since it is easy to inhale when the intensity of the total light is high, the user can feel the change of the total light as more natural by such control.

In certain embodiments, it is possible to realize a lighting system including two lighting devices 100 (referred to as a first lighting device and a second lighting device). At this time, the second illuminating device has a receiver that receives a signal associated with the timing of continuously and repeatedly changing the chromaticity of the total light from the first illuminating device. The control unit 122 of the second lighting device continuously and repeatedly changes the chromaticity of the total light in response to the received signal. With such a configuration, a plurality of lighting devices 100 can be used in synchronization.

Those described above include various examples of the present invention. For the purposes of describing the invention, it is of course not possible to describe any possible combination of elements or procedures, but one of ordinary skill in the art will find that many further combinations and sequences of the invention are possible. right. Accordingly, the invention is intended to include all such modifications, modifications and variations that fall within the spirit and scope of the claims.

100 Lighting device 120 Control device 122 Control unit 124 Drive unit 130 Light source 132 First light source 134 Second light source

Claims (22)

A plurality of light sources including at least a first light source that emits a first light, and a second light source that emits a second light that is different from the first light and has a color name of the same system as the first light.
A control unit that temporally changes the output of at least one of the first light and the second light is provided.
The control unit continuously sets the chromaticity of the total light, which is the sum of the lights emitted by the plurality of light sources, between the first chromaticity and the second chromaticity having a stimulus purity lower than that of the first chromaticity. A lighting device that changes repeatedly. A first light source that emits at least the first light of the first chromaticity, and a second light having a second chromaticity that approaches the white point outside the MacAdam ellipse region of 20 to 30 steps with respect to the first chromaticity. Multiple light sources, including a second light source,
A control unit that temporally changes the output of at least one of the first light and the second light is provided.
The control unit is a lighting device that continuously and repeatedly changes the chromaticity of the total light emitted by the plurality of light sources between the first chromaticity and the second chromaticity. The control unit sets the chromaticity of the total light between the first chromaticity and the second chromaticity . The lighting device according to claim 1 or 2, wherein the lighting device is continuously and repeatedly changed at a fluctuation frequency of 03 to 0.3 Hz. The illuminating device according to any one of claims 1 to 3, wherein the second chromaticity is outside the white basic color name region circle defined in JIS Z8110-1995 with respect to the first chromaticity. .. The illuminating device according to any one of claims 1 to 4, wherein the second chromaticity is closer to the first chromaticity by at least three steps in the MacAdam ellipse than the chromaticity of the equal energy white point. With respect to the first chromaticity, the second chromaticity is
Elliptical: Center coordinates (0.333,0.333), semi-major axis a (0.047), semi-minor axis b (0.019), slope of major axis with respect to x-axis θ (deg) (59)
The illuminating device according to any one of claims 1 to 3, which is outside the white basic color name region circle defined by. With respect to the first chromaticity, the second chromaticity is
Elliptical: Center coordinates (0.333,0.333), semi-major axis a (0.059), semi-minor axis b (0.024), slope of major axis with respect to x-axis θ (deg) (59)
The illuminating device according to any one of claims 1 to 3, which is outside the white basic color name region circle defined by. With respect to the first chromaticity, the second chromaticity is
Elliptical: Center coordinates (0.333,0.333), semi-major axis a (0.070), semi-minor axis b (0.025), slope of major axis with respect to x-axis θ (deg) (59)
The illuminating device according to any one of claims 1 to 3, which is outside the white basic color name region circle defined by. The lighting device according to any one of claims 1 to 8, wherein the intensity at the first chromaticity is larger than the intensity at the second chromaticity in terms of the intensity of the total light. The lighting device according to any one of claims 1 to 9, wherein the change rate in the vicinity of the first chromaticity is larger than the change rate in the vicinity of the second chromaticity in the change rate of the chromaticity with respect to time. .. The rate of change in the intensity of the total light with respect to time is according to any one of claims 1 to 10, wherein the rate of change in the vicinity of the first chromaticity is larger than the rate of change in the vicinity of the second chromaticity. Lighting device. The lighting device according to any one of claims 1 to 11, wherein the period of continuously and repeatedly changing between the first chromaticity and the second chromaticity increases monotonically. The lighting device according to any one of claims 1 to 12, which has an input means capable of selecting the first chromaticity. At time t1, the cycle of continuously and repeatedly changing between the second chromaticity having a lower stimulus purity than the first chromaticity is the first cycle T1, and the difference in stimulus purity is the first difference D1. can be,
At a time t2 different from the time t1, the cycle of continuously and repeatedly changing between the second chromaticity having a lower stimulus purity than the first chromaticity is the second cycle T2, and the difference in stimulus purity is the second. When the difference is D1,
The lighting device according to any one of claims 1 to 13, wherein if the first cycle T1 <the second cycle T2, the first difference D1> the second difference D2. When the time t1 and the time t2 are t1 <t2,
The first cycle and the second cycle satisfy T1 <T2, and the first cycle and the second cycle satisfy T1 <T2.
The lighting device according to any one of claims 1 to 14, wherein the first difference and the second difference satisfy D1> D2. When the time t1 and the time t2 are t1 <t2,
The first cycle and the second cycle satisfy T1> T2, and the first cycle and the second cycle satisfy T1> T2.
The lighting device according to any one of claims 1 to 14, wherein the first difference and the second difference satisfy D1 <D2. The lighting device according to any one of claims 1 to 15, wherein the higher the stimulus purity of the combined light, the greater the intensity of the combined light. The first lighting device according to any one of claims 1 to 3, and the first lighting device.
The second lighting device according to any one of claims 1 to 3, and the second lighting device.
It is a lighting system equipped with
The second luminaire has a receiver that receives from the first luminaire a signal associated with a timing that continuously and repeatedly changes the chromaticity of the combined light.
The control unit of the second lighting device is a lighting system that continuously and repeatedly changes the chromaticity of the total light in response to the received signal. At least the output of one of the first light emitted by the first light source and the second light emitted by the second light source, which is different from the first light and has the same color name as the first light, is temporally output. A control unit that generates a control signal to be changed and a drive unit that drives at least one of the first light source and the second light source according to the control signal are provided.
The control unit sets the chromaticity of the total light including the first light and the second light between the first chromaticity and the second chromaticity having a stimulus purity lower than that of the first chromaticity. A control device that changes continuously and repeatedly. At least the first light of the first chromaticity emitted by the first light source, and the second color emitted by the second light source and approaching the white point outside the MacAdam ellipse region of 20 to 30 steps with respect to the first chromaticity. A control unit that generates a control signal that changes the output of one of the second lights having a degree with time, and a drive unit that drives at least one of the first light source and the second light source in response to the control signal. Equipped with
The control unit continuously and repeatedly changes the chromaticity of the total light including the first light and the second light between the first chromaticity and the second chromaticity. Device. At least the output of one of the first light emitted by the first light source and the second light emitted by the second light source, which is different from the first light and has the same color name as the first light, is temporally output. It is a control method that changes
The chromaticity of the totaled light including the first light and the second light is continuously repeated between the first chromaticity and the second chromaticity having a lower stimulus purity than the first chromaticity. A control method that includes steps to change. At least the first light of the first chromaticity emitted by the first light source, and the second color emitted by the second light source and approaching the white point outside the MacAdam ellipse region of 20 to 30 steps with respect to the first chromaticity. It is a control method that changes the output of one of the second lights having a degree with time.
A control method including a step of continuously and repeatedly changing the chromaticity of the totaled light including the first light and the second light between the first chromaticity and the second chromaticity.

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