Wave irradiation system and wave irradiation method

Abstract

To execute a further diversified presentation in an irradiation by a plurality of colors while forming a wave on a water surface.SOLUTION: A wave irradiation system comprises: a container for accumulating a liquid body; an irradiation device for irradiating light whose color is changed in a predetermined lighting period against the liquid body in the container; and one or a plurality of oscillation devices for applying an oscillation of a predetermined oscillation period against the liquid body in the container, wherein a lighting period and an oscillation period are different.SELECTED DRAWING: Figure 5

Description

[Technical field]

[0001] The present invention relates to a wave illumination system and a wave illumination method, and more particularly to a technology for illuminating the water surface while vibrating liquid in a container to generate waves. [Background technology]

[0002] It has been known for some time that when photographing a rippling water surface with an imaging device, the ripples can be observed still by exposing the imaging device at the same period as the ripples (for example, Patent Document 1). [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Patent Publication No. 2020-71316 Summary of the Invention [Problem to be solved by the invention]

[0004] The inventor of the present invention thought that by applying the principle of the photographing device of the above-mentioned Patent Document 1, and by applying a vibration of a predetermined period to the liquid in a container to make the water surface ripple, and illuminating the water surface with the same period as the vibration period, it would be possible to observe the waves on the water surface as if they were still, even with the naked eye. In addition, the inventor of the present invention thought that by applying the principle of the photographing device of the above-mentioned Patent Document 1, and by applying a vibration of a predetermined period to the liquid in a container to make the water surface ripple, it would be possible to observe the waves on the water surface as if they were still, even with the naked eye. In addition, as shown in FIG. 8 of this application, for example, by using an illumination device such as a stroboscope, L ) to multiple colors (red, green, blue), it was thought that it would be possible to make the waves on the water surface shine in multiple colors. Note that the applicant and the inventor do not acknowledge that the technology shown in Figure 8 was publicly known at the time of filing this application.

[0005] However, as shown in the example in Figure 8, the oscillation period of the water surface waves (T V ) and light emission period (T L) are consistent, when one looks at a point on the water surface from a certain viewpoint, the color of the waves at that point will always be constant, giving a monotonous impression to a person viewing the water surface from a certain viewpoint. Therefore, the main object of the present invention is to provide a more varied impression to a viewer when illuminating the water surface with multiple colors while rippling it. [Means for solving the problem]

[0006] The inventor of the present invention has intensively studied means for achieving the above object, and has found that the color of the waves can be changed by making the period of vibration for rippling the liquid different from the period of change in color of the light irradiated onto the liquid. Based on the above finding, the inventor has realized that the above object can be achieved, and has completed the present invention. Specifically, the present invention has the following configuration or steps.

[0007] A first aspect of the present invention relates to a wave illumination system 100. The wave illumination system 100 according to the present invention comprises a container 10, an illumination device 20, and one or more vibration devices 30, 40. The container 10 is used to store a liquid L. The illumination device 20 emits a predetermined light emission period (T L In other words, the lighting device 20 emits light whose color changes in one light emission period (T L The vibration devices 30 and 40 change the color of the light to two, three, four or more colors within a predetermined vibration period (T V In addition, when a plurality of vibration devices 30, 40 are used to vibrate the liquid L, the vibration period (T V ) means the vibration period of the composite wave obtained by combining the vibration waves of the vibration devices 30 and 40. In the present invention, the light emission period (T L ) and the vibration period (T V ) will be different.

[0008] As mentioned above, the light emission period (T L ) and the oscillation period (T V) are consistent, when observing a point on the water surface from a certain viewpoint, the color of the waves generated there will always be constant. L ) and the oscillation period (T V By varying the color of the waves generated at a single point on the water surface, the color of the waves will gradually change. This allows the waves on the water surface to shine in multiple colors, giving the viewer a more varied impression.

[0009] In the wave illumination system 100 according to the present invention, the oscillation period (T V ) is the light emission period (T L ) is preferably shifted within ±20 Hz, more preferably within ±10 Hz, and most preferably within ±1 Hz. This allows the viewer to observe the change in color of the waves. L If the number of colors that change within the V ) is the light emission period (T L ) within ±(10 / N)%. In this case, for example, L ) is 10 ms (frequency 100 Hz), and when the light changes to three colors during one emission period (N=3), the oscillation period (T V ) is the light emission period (T L ) ±3.33%, or 9.667 to 10.333 ms (103.444 to 96.777 Hz). V ) is the light emission period (T L ) within ±(100 / N)%. In this case, for example, L ) is 10 ms (frequency 100 Hz), and when the light changes to three colors during one emission period (N=3), the oscillation period (T V ) is the light emission period (T L ) ±0.33%, or 9.967 to 10.033 ms (100.331 to 99.671 Hz). In this case, the change in color of the waves is even easier to see with the naked eye.

[0010] In the wave lighting system 100 according to the present invention, the one or more vibration devices preferably include a first vibration device 30 and a second vibration device 40. In this case, the vibration periods of the first vibration device 30 and the second vibration device 40 may be the same or different. In this way, by applying vibrations to the liquid L in the container 10 by the multiple vibration devices 30, 40, a complex waveform can be created on the water surface.

[0011] In the wave illumination system 100 according to the present invention, the first vibration period (T V1 ) and the second vibration period (T V2 ) may be different from the first oscillation period (T V1 ) and the second oscillation period (T V1 ) varies, the amplitude (height) of the composite wave of these vibrations changes periodically. This can create even more complex waveforms on the water surface.

[0012] In the wave illumination system 100 according to the present invention, the second oscillation period (T V2 ) is the first oscillation period (T V1 ) within ±1%. In particular, the second oscillation period (T V2 ) is the first oscillation period (T V1 ) may deviate within ±0.1%. V2 ) and the first oscillation period (T V1 ) is very small, so the amplitude (wave height) of the composite wave changes gradually.

[0013] The wave lighting system 100 according to the present invention preferably further comprises a sensor 50 and a control device 60. The sensor 50 detects an object near the surface of the liquid L in the container 10. For example, the sensor 50 can detect a person's hand attempting to touch the water surface. When an object is detected by the sensor 50, the control device 60 determines the vibration period (T V) is controlled. This allows an interactive presentation, for example, where the waveform changes when a viewer tries to touch the water surface. When multiple vibration devices 30, 40 are present, the vibration periods of the multiple vibration devices 30, 40 may be changed in response to detection of an object by the sensor 50, or the vibration period of any one of the vibration devices 40 may be changed.

[0014] The second aspect of the present invention relates to a wave illumination method. The wave illumination method according to the present invention applies a predetermined light emission period (T L ) (light irradiation step), and subjecting the liquid L in the container 10 to a predetermined vibration period (T V In this case, the light emission period (T L ) and the oscillation period (T V ) are preferably different. Effect of the Invention

[0015] According to the present invention, when illuminating the water surface with a plurality of colors while causing ripples, it is possible to realize a more varied presentation. [Brief description of the drawings]

[0016] [Figure 1] FIG. 1 is a cross-sectional view of one embodiment of a wave illumination system. [Diagram 2] FIG. 2 is an exploded perspective view of one embodiment of a wave illumination system. [Diagram 3] FIG. 3 is a functional block diagram of one embodiment of a wave illumination system. [Figure 4] FIG. 4 shows a schematic of the waves generated by two vibrating devices. [Diagram 5] FIG. 5 shows a schematic example of the relationship between the light emission period and the vibration period. [Figure 6] FIG. 6 is a schematic diagram showing another example of the relationship between the light emission period and the vibration period. [Figure 7]FIG. 7 is a flow diagram illustrating one embodiment of a wave illumination method. [Figure 8] FIG. 8 is a diagram for explaining a problem to be solved by the wave illumination system, showing the relationship between the emission frequency and the vibration frequency. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0017] Hereinafter, the embodiments of the present invention will be described with reference to the drawings. The present invention is not limited to the embodiments described below, and includes appropriate modifications of the embodiments described below within the scope obvious to those skilled in the art.

[0018] Fig. 1 shows a cross-sectional view of a wave illumination system 100 according to an embodiment of the present invention, and Fig. 2 shows an exploded perspective view of the wave illumination system 100. Also, Fig. 3 shows functional blocks of the wave illumination system 100. As shown in these figures, the wave illumination system 100 basically includes a container 10, an illumination device 20, a first vibration device 30, a second vibration device 40, a sensor 50, and a control device 60.

[0019] The container 10 is for storing the liquid L. The container 10 has a bottom plate 11 and a side wall 12 erected around the bottom plate 11, and a space for storing the liquid L is formed. The container 10 is made of, for example, metal or plastic, and can store the liquid L without leaking. In the example shown in FIG. 2, the container 10 has a bottom plate 11 formed in a rectangular shape (quadrangle shape). However, the shape of the bottom plate 11 of the container 10 can be a circle, an ellipse, a triangle, a pentagon, or other polygon. The type of the liquid L filled in the container 10 is not particularly limited, and may be a transparent liquid (water), or a colored transparent or translucent liquid. In addition, the amount of the liquid L filled in the container 10 is preferably about 1 to 20 mm in depth, for example, in order to form fine waves, and is particularly preferably 2 to 15 mm or 3 to 10 mm.

[0020] The lighting device 20 is configured to irradiate light onto the liquid L in the container 10. The lighting device 20 may be disposed directly above the container 10, for example, by attaching it to a ceiling or fixing it to a stand. In this case, the optical axis of the lighting device 20 is parallel to the vertical direction. However, the lighting device 20 may also be disposed so that the optical axis is inclined with respect to the vertical direction, and light may be irradiated onto the liquid L from an oblique direction above the container 10.

[0021] The lighting device 20 is capable of repeatedly emitting a colored light source that emits light instantaneously at regular intervals. Specifically, a known stroboscope may be used as the lighting device 20. The lighting device 20 emits light for one light emission cycle (T L ) the color of the light irradiated onto the liquid L is periodically changed to multiple colors. For example, L The color of the light may be changed to two, three, four or more colors within one light emission period (T). The lighting device 20 may be equipped with three or more single-color LEDs that emit light in any one of R (red), G (green), and B (blue), for example, or may be equipped with one or more full-color LEDs whose emitted color can be controlled. L ) can be, for example, 1 to 1000 ms (frequency: 1000 to 1 Hz), and considering that it is visible to the naked eye, one light emission period (T L ) is preferably set to 10 to 100 ms (frequency: 100 to 10 Hz).

[0022] The first vibration device 30 and the second vibration device 40 are used to generate waves in the liquid L in the container 10 by applying vibration to the liquid L. In this embodiment, speakers capable of outputting sound waves are used as the vibration devices 30 and 40. Alternatively, known devices that mechanically generate vibrations using actuators such as motors by electricity can be used as the vibration devices 30 and 40. As shown in FIG. 1, the vibration devices 30 and 40 are fixed with the sound wave output part in close contact with or close to the bottom plate 11 of the container 10. Therefore, the bottom plate 11 of the container 10 vibrates due to the sound waves generated by the vibration devices 30 and 40, and the vibrations are transmitted to the liquid L in the container 10. Therefore, the liquid L in the container 10 vibrates at a frequency substantially the same as the frequency of the sound waves generated by the vibration devices 30 and 40, and waves are generated on the water surface of the liquid L.

[0023] 4 is a plan view of the container 10 storing the liquid L, and shows the arrangement of the first vibration device 30 and the second vibration device 40, and a schematic representation of ripples generated by vibrations from the vibration devices 30, 40. As shown in FIG. 4, the first vibration device 30 and the second vibration device 40 are arranged at an interval on the rear side of the container 10. When there are two wave sources like this, two waves will overlap, but the wave height will be strong at the point where the two waves intersect in phase, and the wave height will be low or zero at the point where the two waves intersect in antiphase.

[0024] The sensor 50 is provided for the purpose of detecting that an object approaches the liquid L in the container 10 or that an object enters the liquid L. The main object to be detected is a human finger. For example, an area sensor may be used as the sensor 50. Specifically, the sensor 50 (area sensor) is attached to the side wall 12 of the container 10, irradiates an inspection light parallel to the water surface or the bottom plate 11, and receives the inspection light again. The sensor 50 detects the presence of an object based on a change in the inspection light caused by the inspection light being reflected by an object or the inspection light being blocked by an object. When the state of the inspection light changes, the sensor 50 generates an object detection signal and transmits the signal to the control device 60.

[0025] As shown in FIG. 3, the control device 60 is connected to the lighting device 20, the first vibration device 30, the second vibration device 40, and the sensor 50 wirelessly or by wire, and controls each of these devices. Specifically, the control device 60 can control the light emission state (light emission color, light emission brightness, light emission cycle, etc.) of the first vibration device 30. The control device 60 can also control the vibration state (vibration strength, vibration cycle, etc.) of each vibration device 30, 40. As described above, the sensor 50 transmits an object detection signal to the control device 60. The control device 60 can change or control the light emission state of the lighting device 20 and the vibration state of each vibration device 30, 40 based on the object detection signal received from the sensor 50. As the control device 60, a general-purpose personal computer (PC) can be used, or a microcomputer designed specifically for this system can be used. The control device 60 basically includes a processor (CPU, etc.), a memory (RAM, etc.), and an interface for input / output. A predetermined program is stored in the memory, and the processor controls each of the devices 20, 30, 40, 50 via the input / output interface in accordance with this program.

[0026] As shown in FIG. 1 and FIG. 2, the wave lighting system 100 mainly includes a support structure for the container 10 and each vibration device 30, 40. The support structure includes a floating floor material 70, a grating 80, and a support stand 90. The floating floor material 70 is laid on the back side of the bottom plate 11 of the container 10. The floating floor material 70 is arranged for the purpose of efficiently vibrating the entire container 10, which stores liquid, as a floating floor. An example of the floating floor material 70 is a rubber chip mat. The material of the rubber chip mat is not particularly limited, but a known material such as urethane or EPDM (ethylene propylene diene rubber) may be used. The floating floor material 70 has holes formed at positions corresponding to the arrangement of each vibration device 30, 40 (speaker), and each vibration device 30, 40 is inserted into the hole. This prevents the liquid L of the container 10 from adhering to each vibration device 30, 40. The grating 80 is a lattice-like structure made of metal such as stainless steel or aluminum. The vibration devices 30 and 40 are fixed to the grating 80 while being disposed at the openings of the grating 80. This allows the vibration devices 30 and 40 to be kept in close contact with or in close proximity to the rear surface of the bottom plate 11 of the container 10. The support base 90 is mainly used to raise the container 10, the vibration devices 30 and 40, the floating floor material 70, and the grating 80 to a height where viewers can easily observe the waves generated in the liquid L in the container 10 and touch the liquid L. For convenience of drawing, the support base 90 is omitted from FIG. 2.

[0027] Next, the relationship between the light emission period of the lighting device 20 and the vibration period of the vibration devices 30, 40 will be specifically described with reference to Figs. 5 and 6. Note that Figs. 5 and 6 are schematic representations of the relationship between the light emission period and the vibration period deviation, and do not strictly correspond to the actual period and frequency. Fig. 5 first illustrates the basic concept of the present invention. In the example shown in Fig. 5, the light emission period of the lighting device 20 is represented by the symbol T L The light emission period (T L In this light emission cycle (T L) is repeated, so that the emitted color changes periodically in the order of R, G, and B. In the example shown in FIG. 5, the light emission frequency of the lighting device 20 is set to 100 Hz, so that the light emission period (T L ) is 10 ms.

[0028] On the other hand, in FIG. 5, the vibration period of the vibration applied to the liquid L by the vibration devices 30 and 40 is denoted by the symbol T V In the example shown in FIG. 5, the vibration periods of the vibrations caused by the vibration devices 30 and 40 are the same, so the amplitude of the vibration applied to the liquid L is constant. Here, one vibration period (T V ) when the amplitude is strongest corresponds to the crest of the wave of the liquid L in the container 10. Therefore, when observing a wave generated at a point in the liquid L in the container 10 from a certain viewpoint, the wave V At the time when the amplitude of the first oscillation period (T V At the point where the amplitude of the wave L is maximum, the wave of the liquid L appears blue because the lighting device 20 is emitting blue (G) light.

[0029] In addition, as shown in FIG. 5, the oscillation period (T V ) is the light emission period (T L ), but with a very small deviation. Specifically, in the example shown in FIG. 5, the vibration frequency is set to 100.3 Hz, so the vibration period (T V ) is 9.97 ms. As mentioned above, the light emission period (T L ) is 10 ms, so the vibration period (T V ) is shorter than this, causing a shift. V ) is the light emission period (T L ), the light from the lighting device 20 changes periodically in the order of R, B, and G, whereas the color of the waves of the liquid L in the container 10 changes periodically in the order of R, B, and G. In the example shown in FIG. 5, L ) is 10 ms (100 Hz), and the vibration period (T V) is 9.97 ms (100.3 Hz), so a delay of 0.03 ms occurs for 10 ms. The amount of delay per second is 3 ms. In the example of FIG. 5, the light emission color of the lighting device 20 is set to 10 ms for one light emission period (T L ), the three colors change over a period of about 3.3 ms, so the emission time for each color is about 3.3 ms. Therefore, when observing a wave occurring at a point on the surface of Liquid L from a certain viewpoint, the color of the wave changes in about 1.1 seconds (1100 ms). This allows the viewer to observe the gradual change in color of the wave of Liquid L.

[0030] In the example shown in FIG. 5, the vibration period (T V ) is the light emission period (T L ) is set short for the vibration period (T V ) to the light emission period (T L ) you can change the color of the waves in the same way. For example, in contrast to the above example, if you set the light emission period to 10 ms (T L ), the oscillation period (T V ) may be set to 10.3 ms. In the example shown in FIG. 5, one light emission period (T L ) the light emission color changes to three colors, but for example, L In this case, the light emission color may be changed to four colors within a light emission period (T L ), the oscillation period (T V ) is preferably 9.925 ms (100.75 Hz) or 10.025 ms (99.75 Hz).

[0031] Next, FIG. 6 shows an application example in which the vibration period (T V1 ) and the vibration period (T V2 ) is different. V1 ) is called the "first vibration period", and the vibration period (T V2 ) is called the "second vibration period." In the example shown in FIG. 6, the first vibration period (T V1) is set to 9.97ms (100.3Hz), and the second oscillation period (T V2 ) is set to 9.96 ms (100.4 Hz). In this case, the vibration period (T V ) corresponds to the vibration period of the composite wave obtained by combining the vibration of the first vibrating device 30 and the vibration of the second vibrating device 40. The first vibration period (T V1 ) is 9.97 ms, and the second oscillation period (T V2 ) is 9.96 ms, the oscillation period of the composite wave (T V ) is close to the average value of each wave (about 9.965 ms). The same is true for the frequency.

[0032] In addition, since the vibration waves of the first vibration device 30 and the second vibration device 40 have different periods as described above, the phases gradually shift and then match again, repeating this cycle. When the phases of the two vibration waves match, they reinforce each other, so the amplitude of the composite wave becomes large, and when the phases of the two vibration waves are reversed, they weaken each other, so the amplitude of the composite wave becomes small. When the amplitudes of the two vibration waves are equal, when the phases match, the amplitude of the composite wave is at most twice that of each vibration wave, and when the phases are reversed, the amplitude of the composite wave is at its minimum, zero. The amplitude of the composite wave periodically repeats changes between the maximum and minimum values. In this way, by making the periods of the vibration waves of the first vibration device 30 and the second vibration device 40 different, it is possible to create an undulation in which the amplitude changes periodically in the composite wave.

[0033] As shown in Fig. 6, the amplitude of the composite wave changes periodically, and this amplitude of the composite wave corresponds to the height of the waves formed in the liquid L. If the wave height is large, the amount of light irradiated from the lighting device 20 that is reflected also increases, and the waves appear to shine relatively brightly to the viewer. On the other hand, if the wave height is small, the amount of light irradiated from the lighting device 20 that is reflected decreases, and the waves appear to shine relatively weakly to the viewer. In this way, by forming a periodic swell in the wave height, it is possible to create changes in the way the waves appear.

[0034] The vibration period (T V1 ) and the vibration period (T V2 ), as well as the oscillation period of the composite wave (T V For example, about 9.965 ms) is also the light emission period (T L For example, the delay is 10 ms. Therefore, in the example shown in FIG. 6, the viewer can see the gradual change in color of the waves of the liquid L.

[0035] Next, FIG. 7 shows an example of a control flow of the lighting device 20, the first vibration device 30, and the second vibration device 40 by the control device 60. First, the control device 60 sends control signals to the lighting device 20, the first vibration device 30, and the second vibration device 40, respectively, to drive each device (steps S1 to S3). Specifically, the control device 60 causes the lighting device 20 to emit light, and drives the first vibration device 30 and the second vibration device 40 to impart vibration to the liquid L. At this time, the control device 60 specifies the light emission state (emission color, light emission brightness, light emission cycle, etc.) of the lighting device 20. In the illustrated example, the control device 60 sets the lighting device 20 to 100 Hz (light emission cycle 10 ms) and causes it to emit light in three colors, RGB, during one light emission cycle. Similarly, the control device 60 specifies the vibration state (vibration strength, vibration cycle, etc.) of the first vibration device 30 and the second vibration device 40. In the illustrated example, the control device 60 drives the first vibration device 30 at 100.3 Hz (vibration period 9.97 ms) and drives the second vibration device 40 at 100.4 Hz (vibration period 9.96 ms). In addition, in Fig. 7, the initial vibration frequency of the second vibration device 40 is set to the first frequency. In the example shown in Fig. 7, the control device 60 causes the lighting device 20 and the first vibration device 30 to continue emitting light and vibrating according to the conditions specified here until a stop signal is sent.

[0036] On the other hand, the control device 60 changes the vibration state of the second vibration device 40 in response to the detection signal of the sensor 50. That is, the control device 60 determines whether or not the sensor 50 detects an object near the water surface of the liquid L based on the signal received from the sensor 50 (step S4). In a state where an object is not detected, the control device 60 returns to step S3 and drives the second vibration device 40 in the initial state. On the other hand, when an object is detected, the control device 60 changes the vibration frequency of the second vibration device 40 (step S5). Specifically, in the illustrated example, the control device 60 changes the vibration frequency of the second vibration device 40 from 100.4 Hz (vibration period 9.96 ms) to 101.3 Hz (vibration period 9.87 ms). In FIG. 7, the vibration frequency of the second vibration device 40 after the change is set as the second frequency. The second frequency may be any value different from the first frequency, and may be the same as the vibration frequency (100.3 Hz) of the first vibration device 30 or the light emission frequency (100 Hz) of the lighting device 20. In this way, by changing the vibration frequency of the second vibration device 40, the state of the composite wave obtained by combining the vibration waves of the first vibration device 30 and the second vibration device 40 changes. This makes it possible to give the viewer who touches the water surface of the liquid L an impression as if the water surface reacted to his or her finger. After that, the control device 60 judges whether or not a certain time has elapsed since the vibration frequency of the second vibration device 40 was changed to the second frequency (step S6), and after the certain time has elapsed, the control device 60 returns the vibration frequency of the second vibration device 40 to the first frequency again. The certain time is not particularly limited, but is appropriately about 5 to 60 seconds. The control device 60 may repeatedly execute the control process (steps S3 to S6) described here for the second vibration device 40 until it sends a stop signal.

[0037] In the above, in order to express the contents of the present invention, the present specification has described the embodiments of the present invention with reference to the drawings. However, the present invention is not limited to the above-mentioned embodiments, and includes modifications and improvements that are obvious to a person skilled in the art based on the matters described in the present specification. [Explanation of symbols]

[0038] 10...Container 11...Bottom plate 12...Side wall 20...Lighting device 30...First vibration device 40...Second vibration device 50...sensor 60...control device 70...Floating floor material 80...Grating 90...Support stand 100...Wave lighting system L…liquid

Claims

1. A container for storing liquid; an illumination device that irradiates the liquid in the container with light that changes color at a predetermined light emission period; one or more vibration devices that impart vibrations of a predetermined vibration period to the liquid in the container; The light emission period and the vibration period are different Wave lighting system.

2. When the number of colors that change within one light emission cycle is N, the oscillation cycle deviates from the light emission cycle by within ±(10 / N)%.

10. The wave illumination system of claim 1.

3. The one or more vibration devices include a first vibration device and a second vibration device.

10. The wave illumination system of claim 1.

4. A first vibration period of the vibration caused by the first vibration device and a second vibration period of the vibration caused by the second vibration device are different from each other.

4. A wave illumination system according to claim 3.

5. The second vibration period is offset from the first vibration period by within ±1%.

5. A wave illumination system according to claim 4.

6. a sensor for detecting an object near the surface of the liquid in the container; The apparatus further includes a control device that controls the one or more vibration devices so that the vibration period of the vibration applied to the liquid in the container is changed when the object is detected by the sensor.

10. The wave illumination system of claim 1.

7. irradiating the liquid in the container with light whose color changes at a predetermined emission period; The liquid in the container is subjected to vibration at a predetermined vibration period, The light emission period and the vibration period are different Wave lighting method.

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