JP7394310B2 - Lighting devices and fixtures - Google Patents

Description

The present invention relates to a lighting device and a lighting fixture.

Patent Document 1 discloses a device that controls a lighting system based on an input audio signal.

Special Publication No. 2004-501497

In the above-mentioned conventional technology, the beat of music is determined by decoding and mapping the audio signal. As described above, in the above-mentioned conventional technology, since there are many processing steps for audio signals, the configuration becomes complicated, and it is difficult to control the lighting system in real time in conjunction with music.

SUMMARY OF THE INVENTION Therefore, an object of the present invention is to provide a lighting device and a lighting fixture that have a simplified configuration and can control a light source in accordance with the tempo of music.

In order to solve the above problems, the lighting device of the present invention is a lighting device that lights up a light source, and includes a microphone that collects the sound of music playing in the surroundings and converts it into an electrical signal, and a tempo of the music from the electrical signal. and a control circuit that extracts the tempo and controls the light source based on the tempo.

In order to solve the above problems, a lighting fixture of the present invention includes the above lighting device and the above light source.

According to the present invention, it is possible to provide a lighting device and a lighting fixture that have a simplified configuration and can control a light source in accordance with the tempo of music.

FIG. 1 is a block diagram showing a configuration example of a lighting fixture including a lighting device according to a first embodiment. FIG. 2 is a circuit diagram showing an example of a detailed configuration of the lighting fixture according to the first embodiment. FIG. 3 is a block diagram showing the functional configuration of the MCU of the control circuit according to the first embodiment. FIG. 4 is a graph showing an example of a time waveform of an electrical signal output from the microphone according to the first embodiment. FIG. 5 is a graph showing an example of a time waveform of an electrical signal amplified by the amplifier according to the first embodiment. FIG. 6 is a diagram showing the sampling period of the electrical signal according to the first embodiment. FIG. 7 is a graph showing the relationship between the frequency and intensity of the electrical signal according to the first embodiment. FIG. 8 is a graph showing the relationship between the tempo and the light emission color temperature of the light source according to the first embodiment. FIG. 9 is a graph showing the relationship between the tempo and the brightness of the light source according to the first modification of the first embodiment. FIG. 10 is a graph showing the relationship between the tempo and the degree of change in the light emission state of the light source according to the second modification of the first embodiment. FIG. 11 is a graph showing the relationship between the tempo and the range of change in the color temperature of the light source according to the second modification of the first embodiment. FIG. 12 is a diagram showing a tempo extraction method in the control circuit of the lighting device according to the second embodiment. FIG. 13 is a diagram showing a tempo extraction method in the control circuit of the lighting device according to the third embodiment. FIG. 14 is a block diagram showing the functional configuration of a control circuit of a lighting device according to Embodiment 4. FIG. 15 is a diagram showing an example of the appearance of a lighting fixture including the lighting device according to the first embodiment. FIG. 16 is a diagram illustrating another example of the appearance of a lighting fixture including the lighting device according to Embodiment 1. FIG. 17 is a diagram showing still another example of the appearance of a lighting fixture including the lighting device according to the first embodiment.

Hereinafter, embodiments of the present invention will be described in detail using the drawings.

Note that the embodiments described below each represent one comprehensive or specific example of the present invention. The numerical values, shapes, materials, components, arrangement positions and connection forms of the components, steps, order of steps, etc. shown in the following embodiments are merely examples, and do not limit the present invention. Further, among the constituent elements in the following embodiments, constituent elements that are not described in the independent claims indicating the most significant concept will be described as arbitrary constituent elements.

(Embodiment 1)
A lighting device and a lighting fixture according to Embodiment 1 will be described.

[1-1. overall structure]
First, a configuration example of a lighting device according to the present embodiment and a lighting fixture including the same will be described using FIG. 1.

FIG. 1 is a block diagram showing a configuration example of a lighting fixture 10 including a lighting device 20 according to the present embodiment. An input power source 12 is also shown in FIG. 1 along with a lighting fixture 10. As shown in FIG. The input power source 12 is a system power source that supplies AC power to the lighting fixture 10. The input power source 12 is, for example, a commercial AC power source.

As shown in FIG. 1, the lighting fixture 10 includes a lighting device 20 and a light source 60.

The light source 60 is a light emitting section that emits illumination light from the lighting fixture 10. The light source 60 forms an illumination space that is a space that is irradiated with illumination light. In this embodiment, light source 60 includes a first light emitting element 61 and a second light emitting element 62. The first light emitting element 61 is a white light source having a higher emission color temperature (hereinafter also simply referred to as "color temperature") than the second light emitting element 62. The second light emitting element 62 is a white light source having a lower emission color temperature than the first light emitting element 61. Here, white light is light of a color that does not give a sense of hue to humans, and is, for example, light with a color temperature (correlated color temperature) of 2600K to 7100K. For example, the first light emitting element 61 emits white light having a color temperature of 6500K, and the second light emitting element 62 emits white light having a color temperature of 2700K. Although the configurations of the first light emitting element 61 and the second light emitting element 62 are not particularly limited, in this embodiment, they are comprised of an LED (Light Emitting Diode) and a phosphor.

The lighting device 20 is a device that lights up the light source 60. The lighting device 20 includes a microphone 24 and a control circuit 40. In this embodiment, lighting device 20 further includes an AC-DC converter 22, a DC-DC converter 30, and an amplifier 26.

The microphone 24 is a device that collects the sounds of music playing in the surroundings and converts them into electrical signals. In this embodiment, microphone 24 outputs the generated electrical signal to amplifier 26.

The amplifier 26 is a circuit that receives an electrical signal from the microphone 24, amplifies the electrical signal, and outputs it to the control circuit 40. The amplifier 26 can amplify the strength of the electrical signal input to the control circuit 40 to a strength suitable for the control circuit 40 .

The control circuit 40 is a circuit that extracts the tempo of music from the electrical signal and controls the light source 60 based on the tempo. In this embodiment, the control circuit 40 controls the light emission state of the light source 60 by controlling the DC-DC converter 30. The control mode of the control circuit 40 will be described later.

The AC-DC converter 22 is a circuit that converts input AC power into DC power and outputs the DC power. In this embodiment, AC-DC converter 22 converts AC power input from input power source 12 into DC power and outputs it to DC-DC converter 30. The configuration of the AC-DC converter 22 is not particularly limited. The AC-DC converter 22 includes, for example, a rectifier circuit such as a diode bridge, a smoothing capacitor, a boost converter, and the like.

The DC-DC converter 30 is a circuit that supplies current to the light source 60. In this embodiment, the DC-DC converter 30 converts the DC power from the AC-DC converter 22 into DC power with a different voltage, and supplies the converted DC power to the light source 60. In this embodiment, the DC-DC converter 30 includes a first converter 31 and a second converter 32. The first converter 31 and the second converter 32 are converters that supply DC power to the first light emitting element 61 and the second light emitting element 62, respectively. The first converter 31 and the second converter 32 are, for example, step-down chopper circuits.

[1-2. Detailed configuration]
Next, the detailed configuration of the lighting fixture 10 according to the present embodiment will be described using FIGS. 2 and 3. FIG. 2 is a circuit diagram showing an example of a detailed configuration of the lighting fixture 10 according to the present embodiment. FIG. 2 shows detailed configurations of the amplifier 26, control circuit 40, DC-DC converter 30, and light source 60 in the lighting fixture 10 according to the present embodiment. FIG. 3 is a block diagram showing the functional configuration of MCU 46 of control circuit 40 according to this embodiment.

As shown in FIG. 2, the first converter 31 of the DC-DC converter 30 is a step-down chopper circuit, and includes a first switching element M1, a first diode D1, a first inductor L1, and a first capacitor C1. has. The cathode of the first diode D1 is connected to the high potential side input terminal of the DC-DC converter 30, and the anode is connected to the drain terminal of the first switching element M1. The high potential side terminal of the first capacitor C1 is connected to the high potential side input terminal of the DC-DC converter 30, and the low potential side terminal is connected to the first inductor L1. Note that the first light emitting element 61 is connected in parallel to the first capacitor C1. One end of the first inductor L1 is connected to the low potential side terminal of the first capacitor C1, and the other end is connected to a connection point between the first diode D1 and the drain terminal of the first switching element M1. The first switching element M1 is a MOSFET (Metal-Oxide-Semiconductor Field-Effect Transistor). A drain terminal of the first switching element M1 is connected to the anode of the first diode D1 and the first inductor L1. A source terminal of the first switching element M1 is connected to a low potential side input terminal of the DC-DC converter 30.

The second converter 32 of the DC-DC converter 30 is a step-down chopper circuit like the first converter 31, and includes a second switching element M2, a second diode D2, a second inductor L2, and a second capacitor C2. has. The cathode of the second diode D2 is connected to the high potential side input terminal of the DC-DC converter 30, and the anode is connected to the drain terminal of the second switching element M2. The high potential side terminal of the second capacitor C2 is connected to the high potential side input terminal of the DC-DC converter 30, and the low potential side terminal is connected to the second inductor L2. Note that the second light emitting element 62 is connected in parallel to the second capacitor C2. One end of the second inductor L2 is connected to the low potential side terminal of the second capacitor C2, and the other end is connected to the connection point between the second diode D2 and the drain terminal of the second switching element M2. The second switching element M2 is a MOSFET. A drain terminal of the second switching element M2 is connected to the anode of the second diode D2 and the second inductor L2. A source terminal of the second switching element M2 is connected to a low potential side input terminal of the DC-DC converter 30.

The amplifier 26 has an input terminal Tm to which an electrical signal from the microphone 24 is input. Amplifier 26 outputs the amplified electrical signal to control circuit 40 .

The control circuit 40 includes a regulator (REG) 44, an MCU (Micro Controller Unit or Micro Computer Unit) 46, a first driver 41, and a second driver 42.

The regulator 44 is a power supply circuit that supplies driving voltage to the MCU 46, the first driver 41, and the second driver 42. For example, the regulator 44 is supplied with a DC voltage of about 140V output from the AC-DC converter 22, and outputs a DC voltage of about 15V.

The MCU 46 is an integrated circuit that includes a processor, a memory, and a timer, and extracts the tempo of music from the electrical signal input from the amplifier 26, and sends a drive signal determined based on the tempo to the first driver 41 and the second driver. 42. As shown in FIG. 3, the MCU 46 functionally includes an extraction section 46a and a light emission state determination section 46b.

The extraction unit 46a is a processing unit that extracts the tempo of music from the electrical signal input to the MCU 46. The extraction section 46a outputs a signal corresponding to the extracted tempo to the light emission state determination section 46b. The specific operation of the extraction unit 46a will be described later.

The light emitting state determining unit 46b determines the light emitting state of the light source 60 based on the signal corresponding to the tempo input from the extracting unit 46a, and sends a drive signal corresponding to the light emitting state to the first driver 41 and the second driver 42. Output to. The light emission state determination unit 46b outputs, for example, a PWM (Pulse Width Modulation) signal as a drive signal.

A first driver 41 and a second driver 42 shown in FIG. 2 are circuits that drive the first converter 31 and the second converter 32, respectively. More specifically, the first driver 41 outputs a drive signal to the gate terminal of the first switching element M1 of the first converter 31, and the second driver 42 outputs a drive signal to the gate terminal of the second switching element M2 of the second converter 32. Outputs a drive signal.

[1-3. motion]
Next, an example of the operation of the lighting device 20 and the lighting fixture 10 according to the present embodiment will be described using FIGS. 4 to 8. FIG. 4 is a graph showing an example of the time waveform of the electrical signal output from the microphone 24 according to the present embodiment. FIG. 5 is a graph showing an example of the time waveform of the electrical signal amplified by the amplifier 26 according to the present embodiment. The vertical axis of each graph in FIGS. 4 and 5 represents the intensity of sound indicated by the electrical signal. FIG. 6 is a diagram showing the sampling period of the electrical signal according to this embodiment. FIG. 7 is a graph showing the relationship between the frequency and intensity of the electrical signal according to this embodiment.

In this embodiment, the electrical signal shown in FIG. 4 is substantially linearly amplified by the amplifier 26 to become an electrical signal as shown in FIG. 5.

As shown in FIG. 4, the sound of the music collected by the microphone 24 periodically increases in intensity depending on the tempo of the music. In other words, the sound becomes louder as the sounds of multiple instruments overlap at a cycle that corresponds to the tempo of the music. For example, the frequency at which the sound of bass, drums, etc. overlaps with the sound of other instruments and becomes louder corresponds to the tempo.

The extraction unit 46a of the MCU 46 of the control circuit 40 according to this embodiment extracts the tempo of music from the electrical signal. The method for extracting the tempo in the extraction section 46a is not particularly limited. For example, the extraction unit 46a samples the electrical signal at a predetermined sampling period as shown in FIG. 6, and performs Fourier transform on the sampled electrical signal to obtain the frequency and intensity of the electrical signal as shown in FIG. You can get the relationship between Here, the sampling period only needs to be short enough to sufficiently reproduce the waveform of the signal at the frequency corresponding to the tempo. For example, assuming that the maximum value of the tempo is 20 BPM (Beats Per Minute), the frequency corresponding to the maximum value of the tempo is 20 Hz, and the period is 1/20 sec. In this case, the sampling period only needs to be about 1/10 or less of the period 1/20 sec corresponding to the maximum value of the tempo. This makes it possible to obtain the time waveform of the electrical signal necessary to extract the tempo.

The extraction unit 46a may extract the frequency corresponding to the tempo based on the relationship between the frequency and intensity of the electrical signal as shown in FIG. Specifically, the frequency with the highest intensity among the frequencies below the predetermined threshold value ft may be determined as the tempo. The threshold value ft only needs to be larger than the maximum frequency assumed as the tempo. The threshold value may be, for example, the lower limit of the audible frequency, or may be 20 Hz. In the example shown in FIG. 7, the frequency f0 with the highest intensity among the frequencies less than the threshold value ft becomes the tempo.

After the extraction unit 46a of the MCU 46 extracts the music tempo as described above, the light emission state determination unit 46b controls the light source 60 via the first driver 41 and the second driver 42 based on the tempo extracted by the extraction unit 46a. control. In this embodiment, the light emitting state determining unit 46b changes the light emitting state of the light source 60 according to the tempo. Hereinafter, the manner in which the light source 60 is controlled by the MCU 46 according to the present embodiment will be described using FIG. 8. FIG. 8 is a graph showing the relationship between the tempo and the color temperature of the light emitted from the light source 60 according to the present embodiment. In this embodiment, the light emitting state determining unit 46b of the MCU 46 changes the light emitting color temperature of the light source 60 according to the extracted tempo. As shown in FIG. 8, the light emission state determination unit 46b increases the light emission color temperature as the tempo becomes faster. Specifically, as the tempo becomes faster, the light emitting state determining unit 46b increases the current supplied to the first light emitting element 61 by controlling the first switching element M1 using the first driver 41, In addition, by controlling the second switching element M2 using the second driver 42, the current supplied to the second light emitting element 62 is reduced. As a result, as the tempo becomes faster, the luminance of the first light emitting element 61, which has a higher emission color temperature than the second light emitting element 62, increases, and the luminance of the second light emitting element 62 decreases, so that the emission color temperature of the light source 60 increases. becomes higher.

Generally, the faster the tempo of music, the more active the user feels. Furthermore, the higher the color temperature of the lighting space, the more active the user feels. Therefore, by increasing the color temperature of the light emitted from the light source 60 as the tempo of the music becomes faster, it is possible to match the impressions given to the user by the music and the lighting space. Therefore, the lighting device 20 and the lighting fixture 10 according to the present embodiment can realize a comfortable space for the user.

Furthermore, in this embodiment, tempo is used as information about music playing in the surroundings. Such a tempo can be easily extracted only from information on temporal changes in sound intensity. Therefore, in this embodiment, the light source 60 can be controlled as described above by the control circuit 40 having a simplified configuration. Further, in the control circuit 40, complicated signal processing is not required and signal processing can be performed instantaneously, so that the light source 60 can be controlled in real time in accordance with music.

[1-4. Effects, etc.]
As described above, the lighting device 20 according to the present embodiment is a lighting device 20 that lights up the light source 60, and includes a microphone 24 that collects the sound of music playing in the surroundings and converts it into an electrical signal, and a microphone 24 that collects the sound of music playing in the surroundings and converts it into an electrical signal. The control circuit 40 extracts the tempo of music and controls the light source 60 based on the tempo.

In this way, by controlling the light source 60 in accordance with the tempo of the music playing around the lighting device 20, an illumination space suitable for the music being played can be realized. Thereby, a more comfortable space for the user can be realized than when the lighting fixture 10 is not controlled. Furthermore, since the lighting device 20 extracts the tempo as information about the music playing around the user, the tempo can be easily extracted from only the information on the temporal change in sound intensity. Therefore, in this embodiment, the light source 60 can be controlled as described above by the control circuit 40 having a simplified configuration. Further, in the control circuit 40, complicated signal processing is not required and signal processing can be performed instantaneously, so that the light source 60 can be controlled in real time in accordance with music.

The lighting device 20 may further include an amplifier 26 that receives an electrical signal from the microphone 24, amplifies the electrical signal, and outputs the amplified electrical signal to the control circuit 40.

Thereby, the strength of the electrical signal input to the control circuit 40 can be amplified to a strength suitable for the control circuit 40.

Furthermore, in the lighting device 20, the control circuit 40 may change the light emitting state of the light source 60 depending on the tempo.

In this manner, by changing the light emitting state of the light source 60, the illumination space can give the user an impression that is suitable for the impression that music gives to the user. This makes it possible to create a comfortable space for the user. Further, since the light emitting state of the light source 60 can be easily changed by controlling the DC-DC converter 30 or the like, there is no need to complicate the configuration of the control circuit 40.

Furthermore, in the lighting device 20, the control circuit 40 may increase the color temperature of the light emitted from the light source 60 as the tempo becomes faster.

Thereby, it is possible to match the impressions given to the user by the music and the lighting space. Therefore, the lighting device 20 can create a comfortable space for the user.

Furthermore, in the lighting device 20, the control circuit 40 may sample the electrical signal at a predetermined period.

By sampling the electrical signal in this way, the time waveform of the electrical signal can be obtained. Furthermore, by making the sampling period sufficiently smaller than the period corresponding to the tempo, it is possible to obtain the time waveform of the electrical signal necessary for detecting the tempo.

Furthermore, the lighting fixture 10 according to the present embodiment includes a lighting device 20 and a light source 60.

According to the lighting fixture 10 according to the present embodiment, the same effects as the lighting device 20 are achieved.

[1-5. Modified example]
Next, Modification 1 and Modification 2 of the lighting device 20 and lighting fixture 10 according to the present embodiment will be described. The lighting devices and lighting fixtures according to Modifications 1 and 2 are different from the lighting device 20 and lighting fixture 10 according to Embodiment 1 in the manner in which the light source 60 is controlled by the control circuit, and are the same in other respects. Hereinafter, control modes of lighting devices and lighting fixtures according to each modification will be described using FIGS. 9 and 10. FIG. 9 is a graph showing the relationship between the tempo and the brightness of the light source 60 according to the first modification. FIG. 10 is a graph showing the relationship between the tempo and the degree of change in the light emission state of the light source 60 according to the second modification.

As shown in FIG. 9, the control circuit according to Modification 1 increases the brightness of the light source 60 as the extracted tempo becomes faster. Specifically, the control circuit according to Modification 1 increases the current supplied to the first light emitting element 61 and the second light emitting element 62 by controlling the DC-DC converter 30 as the tempo becomes faster. . Accordingly, as the tempo becomes faster, the brightness of the first light emitting element 61 and the second light emitting element 62 becomes higher, so that the brightness of the light source 60 becomes higher.

As mentioned above, the faster the tempo of the music, the more active the user feels. Furthermore, the higher the brightness of the illuminated space, the more active the user feels. Therefore, by increasing the brightness of the light source 60 as the tempo of the music becomes faster, it is possible to match the impressions given to the user by the music and the lighting space. Therefore, the lighting device according to Modification 1 can realize a comfortable space for the user.

The control circuit according to the second modification changes the degree of change in the light emission state of the light source 60 according to the extracted tempo. As shown in FIG. 10, the control circuit according to the second modification increases the degree of change in the light emission state of the light source 60 as the extracted tempo becomes faster. The degree of change in the light emitting state of the light source 60 means the range of change in the light emitting state, such as the color temperature of emitted light and the brightness. Hereinafter, a case will be described using FIG. 11 in which the range of change in emission color temperature is adopted as the degree of change in light emission state. FIG. 11 is a graph showing the relationship between the tempo and the range of change in emission color temperature according to Modification 2. In FIG. 11, the maximum and minimum values of the range of change in luminous color temperature with respect to tempo are shown by solid lines and broken lines, respectively. As shown in FIG. 11, the range of change in the emission color temperature of the light source 60 according to Modification 2 becomes larger as the tempo becomes faster. In order to realize such a relationship between the tempo and the light emitting color temperature, the control circuit according to the second modification example controls the DC-DC converter 30 so that the first light emitting element 61 changes as the tempo becomes faster. The range of the ratio of the current supplied to the second light emitting element 62 to the supplied current is increased. For example, the control circuit according to the second modification may continue to periodically change the emission color temperature of the light source 60, and increase the range of the emission color temperature to be changed as the tempo becomes faster. Note that in the second modification, a degree of change other than the emission color temperature may be adopted as the degree of change in the light emission state. For example, the range of change in brightness of the light source 60 may be used as the degree of change in the light emission state.

In this way, by changing the degree of change in the light emitting state of the light source 60, the illumination space can give the user an impression that is suitable for the impression that music gives to the user. This makes it possible to create a comfortable space for the user. Further, since the degree of change in the light emission state of the light source 60 can be easily changed by controlling the DC-DC converter 30 or the like, there is no need to complicate the configuration of the control circuit 40.

Generally, the faster the tempo of music, the stronger the stimulation the music provides to the user. Furthermore, the greater the degree of change in the state of the illumination space, the stronger the stimulation that the illumination space gives to the user. Therefore, by increasing the degree of change in the light emitting state of the light source 60 as the tempo of the music becomes faster, it is possible to match the impressions given to the user by the music and the lighting space. Therefore, the lighting device according to the second modification can realize a comfortable space for the user.

(Embodiment 2)
A lighting device according to Embodiment 2 and a lighting fixture including the same will be described. The lighting device and lighting fixture according to this embodiment differ from the lighting device and lighting fixture according to Embodiment 1 and its modifications in the tempo extraction method in the control circuit, but are the same in other respects. The control circuit of the lighting device according to the present embodiment will be described below with reference to FIG. 12, focusing on the differences from the control circuit 40 according to the first embodiment. FIG. 12 is a diagram showing a tempo extraction method in the control circuit of the lighting device according to the present embodiment.

The control circuit according to the present embodiment detects a volume peak that appears periodically from information regarding the intensity of sound obtained from an electrical signal, and extracts a tempo from the frequency at which the volume peak appears. Specifically, in the time waveform of the sound intensity indicated by the electrical signal shown in FIG. 12, a plurality of points at which the intensity peaks, that is, a plurality of volume peaks are detected. For example, in the graph shown in FIG. 12, the point at which the volume peaks corresponds to the intersection of the intensity curve and the dotted line. Next, the frequencies at which the plurality of detected volume peaks appear are calculated, and the tempo is extracted from the calculated frequencies at which the volume peaks appear. Note that in detecting volume peaks, only peaks that are equal to or higher than a predetermined threshold may be detected. This makes it possible to reduce detection of volume peaks unrelated to tempo, such as noise components.

The lighting device according to this embodiment also provides the same effects as the lighting devices according to Embodiment 1 and its modifications. Furthermore, in this embodiment, the tempo extraction method is further simplified than the extraction method in the first embodiment. Therefore, in this embodiment, it is possible to realize a lighting device and a lighting fixture having an even simpler configuration.

(Embodiment 3)
A lighting device according to Embodiment 3 and a lighting fixture including the same will be described. The lighting device and lighting fixture according to this embodiment differ from the lighting device and lighting fixture according to Embodiment 1 in the method of extracting a tempo in a control circuit, and are the same in other respects. The control circuit of the lighting device according to the present embodiment will be described below with reference to FIG. 13, focusing on the differences from the control circuit 40 according to the first embodiment. FIG. 13 is a diagram showing a tempo extraction method in the control circuit of the lighting device according to the present embodiment.

The control circuit according to the present embodiment extracts the tempo by extracting the frequency component of the rate of change in sound intensity from information regarding the sound intensity obtained from the electrical signal. Specifically, in the time waveform of the sound intensity indicated by the electrical signal shown in FIG. 13, a point where the rate of change in the sound intensity reaches a predetermined value is detected. For example, as shown in FIG. 13, points where the rate of change in sound intensity is large are detected near the point where the sound intensity is at its peak. Next, the frequency is calculated from the period in which the plurality of detected points appear, and the tempo is extracted from the calculated frequency.

The lighting device according to this embodiment also provides the same effects as the lighting device according to Embodiment 1. Furthermore, in this embodiment, the tempo extraction method is further simplified than the extraction method in the first embodiment. Therefore, in this embodiment, it is possible to realize a lighting device and a lighting fixture having an even simpler configuration.

(Embodiment 4)
A lighting device according to Embodiment 4 and a lighting fixture including the same will be described. The lighting device and lighting fixture according to this embodiment differ from the lighting device 20 and lighting fixture 10 according to Embodiment 1 in that the control circuit filters electrical signals, and are the same in other respects. The control circuit of the lighting device according to this embodiment will be described below with reference to FIG. 14, focusing on the differences from the control circuit according to Embodiment 1. FIG. 14 is a block diagram showing the functional configuration of the control circuit 140 of the lighting device according to this embodiment.

As shown in FIG. 14, the control circuit 140 of the lighting device according to this embodiment includes an MCU 146, a first driver 41, and a second driver 42. Note that the control circuit 140 may include the regulator 44 similarly to the control circuit 40 according to the first embodiment. The first driver 41 and the second driver 42 have the same configuration as the first driver 41 and the second driver 42 according to the first embodiment, respectively.

The MCU 146 is an integrated circuit that includes a processor, a memory, and a timer, and extracts the tempo of music from the input electrical signal and outputs a drive signal determined based on the tempo to the first driver 41 and the second driver 42. do. Functionally, the MCU 146 includes a low-pass filter 146a, an extraction section 146b, and a light emission state determination section 146c. The extraction unit 146b and the light emission state determination unit 146c have the same configuration as the extraction unit 46a and the light emission state determination unit 46b according to the first embodiment, respectively.

The low-pass filter 146a is a filter that passes frequency components below a predetermined frequency of the electrical signal. The low-pass filter 146a according to the present embodiment passes, for example, only frequency components of about 100 Hz or less, which correspond to the bass range of music, out of the electrical signal. This makes it possible to extract only the low-frequency components of the electrical signal whose sound intensity changes depending on the tempo. Thereby, frequency components other than the frequency components corresponding to the tempo included in the electrical signal can be reduced compared to the case where the low-pass filter 146a is not used, so that the extraction unit 146b can easily and accurately extract the tempo.

(Embodiment 5)
In Embodiment 5, an example of a lighting fixture 10 including the lighting device 20 according to Embodiment 1 will be described with reference to FIGS. 15 to 17.

FIG. 15 is a diagram showing an example of the appearance of a lighting fixture 10 including the lighting device 20 according to the first embodiment. FIG. 15 shows the appearance of a downlight 100a as an example of the lighting fixture 10.

The downlight 100a includes a circuit box 101a, a lamp body 102a, and wiring 103a. The circuit box 101a is a housing that houses all or part of the lighting device 20 according to the first embodiment. The lamp body 102a is a lamp body equipped with a light source 60. The wiring 103a electrically connects the circuit box 101a and the light source 60 inside the lamp body 102a.

FIG. 16 is a diagram showing another example of the appearance of the lighting fixture 10 including the lighting device 20 according to the first embodiment. FIG. 16 shows the appearance of a spotlight 100b as an example of the lighting fixture 10. The spotlight 100b includes a circuit box 101b, a lamp body 102b, and wiring 103b. These circuit box 101b, lamp body 102b, and wiring 103b are the same as the circuit box 101a, lamp body 102a, and wiring 103a in FIG. 15, respectively.

FIG. 17 is a diagram showing still another example of the appearance of the lighting fixture 10 including the lighting device 20 according to the first embodiment. FIG. 17 shows the appearance of a spotlight 100c as an example of the lighting fixture 10. The spotlight 100c includes a circuit box 101c and a lamp body 102c. These circuit box 101c and lamp body 102c are also similar to circuit box 101a and lamp body 102b in FIG. 15, respectively.

Also in this embodiment, the same effects as in the first embodiment described above can be obtained. Further, in each example of the lighting equipment according to this embodiment, the lighting devices according to Embodiments 2 to 4 may be used.

(Other variations, etc.)
Although the lighting devices and lighting fixtures according to multiple aspects of the present disclosure have been described above based on the embodiments, the present disclosure is not limited to these embodiments. Unless departing from the spirit of the present disclosure, various modifications to the present embodiment that those skilled in the art can think of, and forms constructed by combining components of different embodiments are also included within the scope of the present disclosure. You can.

For example, the amplifier 26 according to each of the embodiments described above is not an essential component, and the microphone 24 may output an electrical signal to the control circuit 40 without going through the amplifier 26.

Further, although the light source 60 according to each of the above embodiments has two light emitting elements having different color temperatures, the first light emitting element 61 and the second light emitting element 62, the light source 60 has three or more light emitting elements having different color temperatures. It may have a light emitting element. In that case, the lighting device may include three or more converters that respectively supply current to three or more light emitting elements.

Moreover, although each light emitting element according to each of the above embodiments emits white light, it may emit light other than white light. For example, each light emitting element may emit red, green, blue, etc. light.

Moreover, although each light emitting element according to each of the above embodiments is an LED, it may be a light emitting element other than an LED. Each light emitting element may be a solid state light emitting element such as an organic EL light emitting element (OLED) or a laser light emitting element.

Further, in each of the above embodiments, an example has been shown in which the light emitting state and the like change continuously depending on the tempo, but the light emitting state and the like do not necessarily have to change continuously. For example, the light emitting state may change discontinuously in a stepwise manner.

Further, in each of the embodiments described above, the emitted light color temperature or brightness is changed depending on the tempo, but both the emitted light color temperature and the brightness may be changed.

10 Lighting equipment 20 Lighting device 24 Microphone 26 Amplifier 40, 140 Control circuit 60 Light source

Claims (6)

A lighting device that lights up a light source,
A microphone that collects the sounds of music playing around you and converts them into electrical signals,
a control circuit that extracts the tempo of the music from the electrical signal and controls the light source based on the tempo;
The control circuit extracts the tempo by extracting a frequency component of a rate of change in the sound intensity from information regarding the sound intensity obtained from the electrical signal , and adjusts the light emitting state of the light source according to the tempo. change the degree of change in
lighting equipment. The lighting device according to claim 1, further comprising an amplifier that receives the electrical signal from the microphone, amplifies the electrical signal, and outputs the amplified electrical signal to the control circuit. The lighting device according to claim 1 or 2 , wherein the control circuit increases the degree of change in the light emission state of the light source as the tempo becomes faster. The lighting device according to any one of claims 1 to 3 , wherein the control circuit samples the electrical signal at a predetermined period. The lighting device according to any one of claims 1 to 4 , wherein the control circuit includes a low-pass filter that extracts frequency components below a predetermined frequency from the electrical signal. The lighting device according to any one of claims 1 to 5 ,
A lighting fixture comprising the light source.

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