CN109890109B - Lighting device, lighting fixture, and lighting system - Google Patents
Lighting device, lighting fixture, and lighting system Download PDFInfo
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- CN109890109B CN109890109B CN201711277107.0A CN201711277107A CN109890109B CN 109890109 B CN109890109 B CN 109890109B CN 201711277107 A CN201711277107 A CN 201711277107A CN 109890109 B CN109890109 B CN 109890109B
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- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
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Abstract
The invention provides a lighting device, a lighting fixture and a lighting system. When sleep-assist control is performed, a control circuit in the lighting device controls the lighting circuit so that the value of the current supplied from the lighting circuit to the light source unit changes to increase and decrease, and when a control signal received by the lighting device indicates that the user is in a first state in which the user is closer to a sleep-assist state than in a second state, the average value of the current supplied from the lighting circuit to the light source unit decreases than when the received control signal indicates that the user is in the second state. By generating a change in brightness of light emitted from the light source unit and gradually decreasing the intensity according to the user state, it is possible to effectively improve the user's mood and guide the user to the meditation state, so that sleep can be effectively improved.
Description
Technical Field
The present invention relates to the field of lighting, and more particularly, to a lighting device, a lighting fixture, and a lighting system capable of improving sleep of a user.
Background
According to the results of the world health organization's survey, 27% of people have sleep problems. The problem is more prominent in China, which is a society with high-speed development, fast life rhythm and high life pressure. According to recent findings, 35-42% of people in china suffer from sleep problems. Traditional solutions, such as the administration of sleep-aiding drugs, have failed to completely address this problem. In recent years, various proposals have been made to improve the sleep of a user by various means such as sound and smell. However, all solutions provided at present are far from meeting the requirements of the insomnia population.
Disclosure of Invention
In view of the above, the present invention provides a lighting device, a lighting fixture, and a lighting system capable of improving sleep of a user.
According to an aspect of the present invention, there is provided a lighting device for lighting at least one light source unit, the lighting device including: a lighting circuit configured to supply a current to the light source unit; a control circuit configured to perform dimming control on the lighting circuit so as to dim the light source unit; and a receiving section configured to receive a control signal indicating a user state from outside, wherein the dimming control includes sleep assist control, the control circuit controls the lighting circuit so that a value of the current supplied from the lighting circuit to the light source unit changes to increase and decrease when the sleep assist control is performed, and when the control signal received by the receiving section indicates that the user is in a first state in which the user is closer to the sleep state than in a second state in which the control signal received by the receiving section indicates that the user is in the second state, an average value of the current supplied from the lighting circuit to the light source unit decreases.
According to another aspect of the present invention, there is provided a lighting fixture including: the lighting device as described above; and the at least one light source unit.
According to yet another aspect of the present invention, there is provided an illumination system comprising: the lighting fixture as described above; and a human body state collecting device configured to detect a user state and send a control signal representing the user state to the receiving part of the lighting device.
According to investigations, bad mood is the main cause of sleep problems. In contrast, according to the lighting device, the lighting apparatus, and the lighting system of the present invention, the light emitted from the light source unit is changed in brightness and the intensity is gradually decreased according to the user state, so that the mood of the user can be effectively improved, and the user can be guided to the meditation state, thereby effectively improving the sleep.
Other features and aspects of the present invention will become apparent from the following detailed description of exemplary embodiments, which proceeds with reference to the accompanying drawings.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate exemplary embodiments, features, and aspects of the invention and, together with the description, serve to explain the principles of the invention.
Fig. 1 shows a structure of a lighting system according to embodiment 1 of the present invention;
fig. 2 shows a specific waveform example of a current supplied from the lighting circuit to the light source unit according to embodiment 1 of the present invention;
fig. 3 shows a specific waveform example of a current supplied from the lighting circuit to the light source unit according to embodiment 1 of the present invention;
fig. 4 shows a specific waveform example of a current supplied from the lighting circuit to the light source unit according to embodiment 1 of the present invention;
fig. 5 shows a specific time setting example of the current supplied from the lighting circuit to the light source unit according to embodiment 1 of the present invention;
fig. 6 shows a specific time setting example of the current supplied from the lighting circuit to the light source unit according to embodiment 1 of the present invention;
fig. 7 shows the relationship between the user's sense of sleep, breathing frequency and execution time of sleep aid control as derived by testing;
fig. 8 shows the structures of a lighting device and a lighting fixture according to embodiment 3 of the present invention;
fig. 9 shows specific arrangement positions and irradiation directions of the light source unit and the second light source unit when the lighting fixture is a ceiling lamp; and
fig. 10 illustrates specific arrangement positions and irradiation directions of the light source unit and the second light source unit when the lighting fixture is a floor lamp.
Detailed Description
Various exemplary embodiments, features and aspects of the present invention will be described in detail below with reference to the accompanying drawings. In the drawings, like reference numbers can indicate functionally identical or similar elements. While the various aspects of the embodiments are presented in drawings, the drawings are not necessarily drawn to scale unless specifically indicated.
The word "exemplary" is used exclusively herein to mean "serving as an example, embodiment, or illustration. Any embodiment described herein as "exemplary" is not necessarily to be construed as preferred or advantageous over other embodiments.
Furthermore, in the following detailed description, numerous specific details are set forth in order to provide a better understanding of the present invention. It will be understood by those skilled in the art that the present invention may be practiced without some of these specific details. In some instances, methods, procedures, components, and circuits that are well known to those skilled in the art have not been described in detail so as not to obscure the present invention.
Example 1
Fig. 1 shows a lighting system according to embodiment 1 of the present invention. The lighting system includes a lighting fixture 1 and a user status acquisition device 5. The lighting fixture 1 includes a lighting device 2 and a light source unit 3. The lighting device 2 supplies a current to the light source unit 3, thereby lighting the light source unit 3. The lighting device 2 includes a lighting circuit 21 for receiving electric power from the external power supply 4 and supplying current to the light source unit 3, a control circuit 31 that performs dimming control on the lighting circuit 21 to thereby perform dimming on the light source unit 3, and a receiving portion 32 that can receive a control signal from the outside.
The power source 4 may be an ac power source such as a commercial power source or a dc power source such as a battery. The configuration of the lighting circuit 21 differs depending on the type of the power source 4. When the power source 4 is an alternating-current power source, the lighting circuit 21 may include a rectifying and smoothing circuit and a power conversion circuit. The rectifying and smoothing circuit may include a rectifying circuit and a smoothing capacitor. Preferably, the rectifying circuit may comprise a diode bridge. The rectifier circuit is configured to full-wave rectify alternating-current power supplied from an alternating-current power supply. The smoothing capacitor is configured to smooth (remove ripples) a pulsating voltage (pulsating current) obtained by full-wave rectification by the rectifier circuit. The power conversion circuit may include a step-down chopper circuit (step-down DC/DC converter), convert the electric power output from the rectifying and smoothing circuit, and output a current necessary for the operation of the light source unit 3. When the power source 4 is a direct-current power source, the lighting circuit 21 may include a DC/DC converter such as a step-up chopper circuit, a step-down chopper circuit, or a step-up and step-down chopper circuit, converts electric power supplied from the direct-current power source, and outputs a current necessary for the operation of the light source unit 3.
The control circuit 31 can change the value of the current output from the lighting circuit 21 to the light source unit 3 by switching-controlling a switch connected in series with the light source unit 3 in the lighting circuit 21, thereby dimming the light source unit 3.
The receiving unit 32 communicates with a transmitting unit 55 of the user state acquisition device 5, which will be described later, by a wireless or wired manner, receives a control signal indicating the user state from the transmitting unit 55, and supplies the received control signal to the control circuit 31. The receiver 32 and the transmitter 55 may use any communication method, such as WiFi, Zigbee, Bluetooth, PLC (power line communication), etc., but the present invention is not limited thereto.
The light source unit 3 may include 1 or more LEDs (light emitting diodes) connected in series and/or parallel. The intensity of light emitted from the light source unit 3 is proportional to the magnitude of the current value supplied from the lighting circuit 21 to the light source unit 3, and when the current value supplied from the lighting circuit 21 to the light source unit 3 is less than a predetermined value, the light source unit 3 does not emit light.
It should be noted that the above is merely an exemplary description of the structures of the lighting device and the lighting fixture of the present invention. The configurations of the lighting device and the lighting fixture of the present invention are not limited to the above, and any appropriate configuration known to those skilled in the art may be adopted.
The user state acquisition device 5 includes a respiratory rate calculation unit 51, a pulse rate calculation unit 52, a body temperature calculation unit 53, a blood pressure calculation unit 54, a control unit 55, and a transmission unit 56.
Alternatively, the user-state collecting means 5 may include a photosensor that irradiates a light beam, which is absorbed by blood flowing in the arteries, to the user's body, and receives light reflected or transmitted from the user's body. The respiratory rate calculation unit 51, the pulse rate calculation unit 52, and the blood pressure calculation unit 54 can obtain the respiratory rate (number of breaths per minute), the pulse rate (number of arterial pulses per minute), and the blood pressure of the user by performing predetermined data processing on the reflected light or transmitted light received by the photosensor.
Alternatively, the breathing frequency calculation section 51 may include a three-axis acceleration sensor attached to the chest of the user, and calculate the breathing frequency of the user by analyzing the breathing information collected by the three-axis acceleration sensor. Alternatively, the breathing frequency calculation section 51 may further include an acoustic sensor disposed around the user, and calculate the breathing frequency of the user by analyzing the breathing sound collected by the acoustic sensor.
Alternatively, the pulse rate calculating section 52 may include an electrocardiographic sensor that collects electrocardiographic data, and calculates the pulse rate of the user by analyzing the electrocardiographic data collected by the electrocardiographic sensor. Alternatively, the pulse rate calculating section 52 may include a pressure sensor attached to the wrist or the like of the user, and calculate the pulse rate of the user from data collected by the pressure sensor.
Alternatively, the blood pressure calculating section 54 may include a compression band wound around the wrist or the like of the user and a corresponding blood pressure measuring module, an air pump, and the like, and measures the blood pressure of the user by inflating or deflating the compression band.
Alternatively, the body temperature calculation section 53 may include a temperature sensor that is in close contact with the body surface of the user, and obtain the body temperature of the user based on the detection result of the temperature sensor.
The present invention is not limited to the specific configurations of the respiratory rate calculation unit 51, the pulse rate calculation unit 52, the body temperature calculation unit 53, and the blood pressure calculation unit 54, and any suitable configuration may be employed to calculate the respiratory rate, the pulse rate, the body temperature, and the blood pressure.
The respiratory rate calculation unit 51, the pulse rate calculation unit 52, the body temperature calculation unit 53, and the blood pressure calculation unit 54 supply the calculated data to the control unit 55. The control section 55 determines the user state based on the received data. As known to those skilled in the art, as a person gradually enters a sleep state, the person's respiratory rate, pulse rate, body temperature, blood pressure gradually decrease and remain at a minimum after entering the sleep state. It may be determined that the user enters a sleep-in state when the breathing rate, pulse rate, body temperature and/or blood pressure drops to a predetermined value. The predetermined value may be determined based on previous detection data when the user entered the sleep state. The user may be determined to enter the sleep-in state when the breathing rate, pulse rate, body temperature, and/or blood pressure decrease and then remain unchanged for a predetermined time.
Alternatively, the control section may calculate a numerical value indicating the degree of progress of falling asleep of the user in such a manner that the smaller the numerical value, the closer the user is to the falling asleep state. Wherein the lower the breathing frequency, the smaller the value; the lower the pulse rate, the smaller the value; the lower the body temperature, the smaller the value; the lower the blood pressure, the smaller the value. Alternatively, the control section may calculate the value F according to the following formula.
F ═ a × respiratory rate + B × pulse rate + C × body temperature + D × blood pressure ÷ E
Wherein A, B, C, D is a constant, which may be the same or different, and E is a constant. Alternatively, a may be set greater than B, C, D to increase the effect of breathing frequency on the value F.
Alternatively, the control part may divide the sleep progress of the user into a plurality of levels, and determine the corresponding levels according to the detected respiratory rate, pulse rate, body temperature, and blood pressure of the user. For example, levels 1, 2, 3, 4 may be set, where level 1 represents an awake state and level 4 represents an asleep state. The level 2 may be set when the respiratory rate, pulse rate, body temperature and/or blood pressure decrease from the awake state (value of awake state-value of sleep onset state) × 20-40%, and the level 3 may be set when the respiratory rate, pulse rate, body temperature and/or blood pressure decrease from the awake state (value of awake state-value of sleep onset state) × 50-70%.
The user state acquisition device 5 does not need to include all of the respiratory rate calculation unit 51, the pulse rate calculation unit 52, the body temperature calculation unit 53, and the blood pressure calculation unit 54, and may include at least one of the respiratory rate calculation unit 51, the pulse rate calculation unit 52, the body temperature calculation unit 53, and the blood pressure calculation unit 54.
Alternatively, the user-state acquisition device 5 may include a respiratory-rate calculation section 51 and a pulse-rate calculation section 52. The control unit 55 calculates a numerical value indicating the progress of falling asleep of the user based on the breathing rate and the pulse rate such that the lower the breathing rate, the smaller the numerical value, and the lower the pulse rate, the smaller the numerical value.
Alternatively, the user-state acquisition means 5 may include only the breathing-frequency calculation section 51. In this case, the control unit 55 may set the breathing rate as a numerical value indicating the degree of progress of sleep of the user without performing any processing on the breathing rate.
Subsequently, the control unit 55 supplies the calculation result to the transmission unit 56, and the transmission unit 56 transmits the calculation result to the reception unit 32 of the lighting device 2 as a control signal indicating the user state. Alternatively, the transmission unit 56 may be configured to continuously transmit the control signal, or may be configured to transmit the control signal when the lighting device 2 performs sleep assist control described below. Alternatively, the transmission unit 56 may be configured to periodically transmit the control signal, or may be configured to transmit the control signal when a change in the calculation result of the control unit 55 satisfies a predetermined condition.
The sleep-assist control of the lighting device 2 will be described below. When receiving a corresponding instruction from the outside or satisfying a preset condition (for example, reaching a certain time point preset by the user), the control circuit 31 may perform sleep assist control on the lighting circuit 21 so that the value of the current supplied from the lighting circuit 21 to the light source unit 3 changes to increase and decrease, and when the control signal received by the receiving portion 32 indicates that the user is in the first state in which the user is closer to the sleep-in state than the second state, the average value of the current supplied from the lighting circuit 21 to the light source unit 3 is decreased compared to when the control signal received by the receiving portion 32 indicates that the user is in the second state.
It has been verified through actual user tests that the light emitted from the light source unit is changed in brightness by changing the current value to increase and decrease, so that the mood of a person can be stabilized and the person can more easily enter a sleep state. Further, by gradually dropping the average value of the current supplied from the lighting circuit 21 to the light source unit 3 in the process in which the user gradually enters the sleep-in state, it is possible to avoid being awakened due to an abrupt change in the intensity of light in the case where the user has entered the light sleep state.
Examples of the current supplied from the lighting circuit 21 to the light source unit 3 at the time of sleep assist control are shown in fig. 2, 3, and 4. The horizontal axis of fig. 2, 3, and 4 represents time, the origin is a time point at which the sleep-assist control is started, and the vertical axis represents a current value, which is expressed as a ratio to the maximum current value.
In fig. 2, the current varies sinusoidally. Assume that the calculation result of the control unit 55 is 10 in the awake state and 2 in the sleep state. At a time point T1, the control circuit 31 determines that the signal received by the receiving portion 32 has changed from 10 to 8, and adjusts the current supplied from the lighting circuit 21 to the light source unit 3 accordingly so that the maximum value and the minimum value of the current of the sinusoidal waveform both decrease. At a time point T2, the control circuit 31 determines that the signal received by the receiving portion 32 has changed from 8 to 6, and decreases the maximum value and the minimum value of the current supplied from the lighting circuit 21 to the light source unit 3 again. At time T3, the control circuit 31 determines that the signal received by the receiving portion 32 has changed from 6 to 4, and decreases the maximum value and the minimum value of the current supplied from the lighting circuit 21 to the light source unit 3 again, at which time the minimum value of the current becomes 0. At a time point T4, the control circuit 31 determines that the signal received by the receiving section 32 has changed from 4 to 2 and that the user has entered the sleep-in state, lowers the maximum value of the current supplied from the lighting circuit 21 to the light source unit 3 again, and stops supplying the current to the light source unit 3 after one waveform ends.
In fig. 3, the current likewise varies sinusoidally. The difference from fig. 2 is that the minimum value of the current of each waveform is kept at 0. At a time point T1, the control circuit 31 determines that the signal received by the receiving section 32 has changed from 10 to 8, and accordingly adjusts the current supplied from the lighting circuit 21 to the light source unit 3 so that the maximum value of the current of the sinusoidal waveform decreases. At time T2, the control circuit 31 determines that the signal received by the receiving portion 32 has changed from 8 to 6, and decreases the maximum value of the current supplied from the lighting circuit 21 to the light source unit 3 again. At time T3, the control circuit 31 determines that the signal received by the receiving section 32 has changed from 6 to 4, and decreases the maximum value of the current supplied from the lighting circuit 21 to the light source unit 3 again. At a time point T4, the control circuit 31 determines that the signal received by the receiving section 32 has changed from 4 to 2 and that the user has entered the sleep-in state, lowers the maximum value of the current supplied from the lighting circuit 21 to the light source unit 3 again, and stops supplying the current to the light source unit 3 after one waveform ends.
In fig. 4, the current also varies sinusoidally, but in a different pattern than in fig. 2 and 3. At a time point T1, the control circuit 31 determines that the signal received by the receiving portion 32 has changed from 10 to 8, and accordingly adjusts the current supplied from the lighting circuit 21 to the light source unit 3 so that the maximum value of the current of the sinusoidal waveform is reduced and the minimum value is kept constant at 10%. At time T2, the control circuit 31 determines that the signal received by the receiving portion 32 has changed from 8 to 6, and decreases the maximum value of the current supplied from the lighting circuit 21 to the light source unit 3 again, keeping the minimum value at 10%. At a time point T3, the control circuit 31 determines that the signal received by the receiving portion 32 has changed from 6 to 4, and simultaneously decreases the maximum value and the minimum value of the current supplied from the lighting circuit 21 to the light source unit 3. At time T4, control circuit 31 determines that the signal received by receiving section 32 has changed from 4 to 2 and that the user has entered the sleep state, and again decreases the maximum value and the minimum value of the current supplied from lighting circuit 21 to light source unit 3, at which point the minimum value decreases to 0, and stops supplying the current to light source unit 3 after the two waveforms end.
As will be appreciated by those skilled in the art, the foregoing description is by way of example only, and the invention is not limited thereto. As for the condition of changing the current supplied from the lighting circuit 21 to the light source unit 3, it may be set that the control signal received by the receiving section 32 is changed by a predetermined amount, for example, dropped by a predetermined magnitude, or dropped to a predetermined value. Alternatively, the predetermined amplitude or value may vary. For example, the predetermined width as the determination condition may be set to be large in the early stage of the sleep-assist control, and the predetermined width as the control condition may be set to be small in the late stage of the sleep-assist control.
As for the timing of changing the current supplied from the lighting circuit 21 to the light source unit 3, a time point at which the above condition is satisfied may be selected, and a start point of a next waveform (change of next increase and decrease) after the time point at which the above condition is satisfied may also be selected.
As for the change in the current supplied from the lighting circuit 21 to the light source unit 3, as described above, it is possible to select to reduce the maximum value and the minimum value at the same time, or to select to reduce only the maximum value. The magnitude of each reduction may be the same or different, and may be set in relation to the change in the control signal or may be fixed. When both the maximum value and the minimum value decrease, the decrease magnitudes of the maximum value and the minimum value may be set to be the same or different. In addition to the change in the current value, the change in the waveform of the current may be performed simultaneously. For example, the current waveform may be a triangular wave, a rectangular wave, or the like in the early stage of sleep assist control, and when it is determined that the user is close to the sleep state, the current waveform is adjusted to a sinusoidal wave.
As for the processing when it is determined that the user enters the sleep state, it may be set to continue to maintain the current for a predetermined time and then stop supplying the current, or it may be set to decrease the current to a predetermined value larger than 0, maintain the current for a predetermined time and then stop supplying the current, or it may be set to directly stop supplying the current.
Further, as can be seen from comparing the examples of fig. 2, 3, and 4, the current shown in fig. 2 makes the light emitted from the light source unit 3 stronger in the early stage of the sleep-assist control, but the light-dark change of the light is less noticeable than in fig. 3 and 4, and the light emitted from the light source unit 3 is weaker in the later stage of the sleep-assist control. The current shown in fig. 3 generates the strongest brightness change to attract the attention of the user more effectively, but a time period during which the light source unit 3 is turned off may occur from the early stage, which may cause inconvenience, and the brightness change at the early stage may be too large to cause irritation to a part of the user. The current shown in fig. 4 has similar drawbacks to the example of fig. 3, but is slightly improved with respect to the example of fig. 3.
A control program corresponding to fig. 2, 3, and 4 may be stored in advance in the control circuit 31 and automatically executed when sleep-assist control is executed so that a corresponding current is supplied from the lighting circuit 21 to the light source unit 3. Further, the lighting fixture 1 may be provided with an operator that can be operated by a user so that the user selects one of the prestored current waveforms shown in fig. 2, 3, and 4, for example, as the waveform of the current supplied at the time of sleep assist control. For example, the current waveform shown in fig. 2 may be stored in advance as the "relaxing" mode, the current waveform shown in fig. 3 may be stored in advance as the "strengthening" mode, and the current waveform shown in fig. 4 may be stored in advance as the "standard" mode. The user can select any mode according to the requirement of the user.
The user can also perform various settings of sleep-aid control through the operator, including current changing conditions, current changing time points, current changing modes, current reduction amplitude, current setting after judging that the sleep-aid control enters a sleep state and the like. After the user finishes editing, the control circuit 31 may control the lighting circuit 21 according to the user-edited mode so that the current output from the lighting circuit 21 coincides with the user-edited mode.
The current waveforms shown in fig. 2-4 above are exemplary only, and the present invention is not limited thereto. In fig. 2 to 4, the current varies in a sine wave shape, thereby enabling the intensity of light emitted from the light source unit to smoothly vary, so that the stimulus to the user due to the abrupt variation of light can be reduced. However, the current supplied from the lighting circuit 21 to the light source unit 3 may be changed to increase or decrease in accordance with other waveform shapes, such as a triangular waveform, a trapezoidal waveform, and the like. Also, the present invention does not require that the waveform shape of the current be the same throughout the sleep-assist control period. For example, as described above, it is possible to change the current in accordance with the shape of a triangular wave in the early stage of the sleep-assist control, and to change the current in accordance with the shape of a sinusoidal wave in the later stage of the sleep-assist control.
In fig. 2 to 4, the variation amplitudes of various currents (100% to 50%), (100% to 0%), (100% to 10%) and the like are illustrated. However, the present invention is not limited thereto. As will be understood by those skilled in the art, the larger the variation range of the current, the more obvious the light intensity variation of the light source unit, and the more attractive the user's attention, but at the same time, when the light intensity variation of the light source unit is too large, the user may be stimulated. Therefore, the magnitude of the current change can be selected according to the actual situation.
The setting of the time length of the current change will be described below with reference to fig. 5 and 6. As shown in fig. 5 and 6, at the time of sleep-assist control, a guidance period in which the current increases from the minimum value to the maximum value (as shown in fig. 6) or increases from the minimum value to the maximum value and then decreases to the minimum value (as shown in fig. 5) in the change of the current supplied from the lighting circuit 21 to the light source unit 3 may be set in a range of 3 seconds to 3.75 seconds.
This is set according to the breathing frequency of the person. The human respiratory rate is usually 16-20 times/min. Tests have verified that when a person observes a change in the brightness of light, the time to complete one breath is usually involuntarily adjusted to be the same as the time of the change in light from dark to light (the time period during which the current increases from the minimum value to the maximum value, for example, the time period during which the current value shown in fig. 5 and 6 is from 0% to 100%) or the time of the change in light from dark to light to dark (the time period during which the current increases from the minimum value to the maximum value and then decreases to the minimum value, for example, the time period during which the current value shown in fig. 5 and 6 is from 0% to 100% to 0%).
When the time for the change of light from dark to light or the time for the change of light from dark to light to dark is 3 seconds, the breathing frequency of the person can be guided to 20 times/minute. When the time of the change of light from dark to light or the time of the change of light from dark to light to dark is 3.75 seconds, the breathing frequency of the person can be guided to 16 times/minute.
Therefore, by setting the guidance period in the change of the current supplied from the lighting circuit 21 to the light source unit 3 in the range of 3 seconds to 3.75 seconds, it is possible to guide and stabilize the breathing frequency of the person to a certain value of 16 to 20 times/minute, thereby further improving the sleep-aid effect.
Further, in order to further provide the sleep-aiding effect, the color temperature of the light emitted from the light source unit 3 may be set to 3000K or less. As known to those skilled in the art, humans have different psycho-perceptions for light of different color temperatures, and tests have verified that different color temperatures have been determined to be suitable for different scenes. For example, light energy with a color temperature of 6200K keeps a person awake, and is generally suitable for scenes such as learning, breakfast, lunch, getting up; light with a color temperature of 5000K is generally suitable for scenes such as cooking, working, clothes selection and the like; light with a color temperature of 3500K is generally suitable for scenes such as parties; the light with the color temperature of 2700K is generally suitable for scenes such as dinner, reading and the like; light with a color temperature of 2500K is generally suitable for scenes such as before bedtime. By setting the color temperature of the light emitted from the light source unit 3 to 3000K or less, the user can more easily enter a relaxed state, thereby further improving the sleep-aiding effect.
The inventors tested the actual experience of the user of the lighting fixture of the present invention. The test results are shown in fig. 7. As the execution time of the sleep aid control is extended, the sense of sleep onset of the user is enhanced, and the breathing frequency of the user is decreased. When the execution time of the sleep-aid control is prolonged to a certain length, the user can almost smoothly enter the sleep state. This sufficiently proves the effectiveness of the lighting device and the lighting fixture of the present invention for improving sleep. According to the test result, the sleep-aid control time can be set to 30 minutes or more.
Example 2
As described above, the 3 second guidance period may guide the person's breathing frequency to 20/min, the 3.16 second guidance period may guide the person's breathing frequency to 19/min, the 3.33 second guidance period may guide the person's breathing frequency to 18/min, the 3.53 second guidance period may guide the person's breathing frequency to 17/min, and the 3.75 second guidance period may guide the person's breathing frequency to 16/min.
Tests have verified that the breathing rate of a person is lower in the more relaxed state, and is typically the lowest 16 times/min in the sleep state. By gradually extending the guidance period as above, the user is guided to gradually decrease the breathing frequency, so that the user can enter the sleep state earlier.
Alternatively, the guidance period may be set to 60/(the user's breathing frequency-1) seconds. When it is determined that the breathing frequency of the user is 20 times/minute, the guidance time period is set to 3.16 seconds to guide the breathing of the user to 19 times/minute. When it is determined that the breathing frequency of the user falls to 19 times/minute, the guidance period is set to 3.33 seconds to guide the breathing of the user to 18 times/minute. When it is determined that the breathing frequency of the user falls to 18 times/minute, the guidance period is set to 3.53 seconds to guide the breathing of the user to 17 times/minute. When it is determined that the user's breathing rate has decreased to 17 times/minute, the guidance period is set to 3.75 seconds to guide the user's breathing to 16 times/minute. When the respiratory rate of the user is judged to be reduced to 16 times/minute, the user is judged to enter the sleep-entering state, and the sleep-helping control can be ended.
Alternatively, a transition period may be set between the set values of the different guidance periods, during which the guidance period is gradually extended. For example, when it is determined that the breathing rate of the user has changed to 20 times/minute, a transition period of 1 minute is entered, and the guidance period is gradually extended from 3 seconds to 3.16 seconds in the order of a certain step, for example, 3.04 seconds, 3.08 seconds, 3.12 seconds, and 3.16 seconds.
It should be noted that the above contents are merely exemplary, and the present invention is not limited thereto. For example, it may be arranged to change the guidance period only when the breathing frequency of the user decreases, and to maintain the guidance period unchanged when the breathing frequency of the user increases. The transition period described above may or may not be set. The length of the transition period and the change pattern of the guidance period may be arbitrarily set. Alternatively, in the case where the user state acquisition device 5 includes any one of the pulse rate calculation unit 52, the body temperature calculation unit 52, and the blood pressure calculation unit 54 in addition to the respiratory rate calculation unit 51, the guidance time period may be changed based on a control signal obtained by the control unit 55 comprehensively considering the respiratory rate and any one of the pulse rate, the body temperature, and the blood pressure. It may be arranged to change the leading segment when the control signal received by the receiving part 32 has undergone a predetermined change, for example, a drop by a predetermined magnitude, or a drop to a predetermined value. Alternatively, the predetermined amplitude or value may vary. For example, as mentioned in embodiment 1, assuming that the calculation result of the control section 55 is 10 in the awake state and 2 in the sleep-in state, when the calculation results are 10, 8, 6, 4, 2, the guidance time periods are set to 3 seconds, 3.16 seconds, 3.33 seconds, 3.53 seconds, 3.75 seconds, respectively.
As for the timing of changing the guidance time period, a time point satisfying the above condition may be selected, and a start point of a next waveform (change of next increase and decrease) after the time point satisfying the above condition may be selected.
The present invention is not limited to the above-described setting of all 5 types of guidance time periods, and may include only a part thereof, and the guidance time periods may be set to 3 seconds, 3.33 seconds, and 3.75 seconds in order, for example, in accordance with the control signal received by the receiving unit 32.
Example 3
A lighting fixture 11 according to embodiment 3 of the present invention is shown in fig. 8. The difference from embodiment 1 is that the lighting fixture 11 further includes a second light source unit 5. The second light source unit 5 receives a current supplied from the lighting circuit 21 to light. The color temperature of the light of the second light source unit 5 may be set higher than that of the light source unit 3. In this way, by accommodating the light source unit 3 having a low color temperature and capable of sleep aid control and the second light source unit 5 having a high color temperature and capable of being used as general lighting in one lighting fixture 11, it is possible to realize both functions of sleep aid and general lighting with one lighting fixture, and space is effectively saved.
In order to reduce the influence of the second light source unit 5 on the sleep assist control of the light source unit 3, the second light source unit 5 may be turned off when the light source unit 3 performs the sleep assist control, or the light source unit 3 and the second light source unit 5 may be set to emit light in different directions as shown in fig. 9 and 10.
For example, as shown in fig. 9, when the lighting fixture 11 is a ceiling lamp mounted on a ceiling, it is conceivable to mount the light source unit 3 on the outer periphery of the lighting fixture 11 and set the irradiation direction of the light source unit 3 to be upward, i.e., in the ceiling direction, mount the second light source unit 5 in the center of the lighting fixture 11 and set the irradiation direction of the second light source unit 5 to be downward, i.e., in the floor direction.
As shown in fig. 10, when the lighting fixture 11 is a floor lamp, it is conceivable that the light source unit 3 is mounted on the outer peripheral portion of the lighting fixture 11, and the irradiation direction of the light source unit 3 is set to be downward, i.e., the floor direction, and the second light source unit 5 is mounted on the central portion of the lighting fixture 11, and the irradiation direction of the second light source unit 5 is set to be upward, i.e., the ceiling direction.
By setting the irradiation direction of the light source unit 3 as described above, when the user lies on the bed and is ready to sleep, the light and shade change of the light emitted from the light source unit 3 can be more clearly seen, and the effect of sleep aid control of the light source unit 3 can be enhanced.
It should be noted that the arrangement positions and the arrangement of the irradiation directions of the light source unit 3 and the second light source unit 5 described above are merely exemplary, and the present invention is not limited thereto. The arrangement positions and the irradiation directions of the light source unit 3 and the second light source unit 5 can be set according to the specific structure and arrangement position of the lighting fixture 11.
Having described embodiments of the present invention, the foregoing description is intended to be exemplary, not exhaustive, and not limited to the embodiments disclosed. Many modifications and variations will be apparent to those of ordinary skill in the art without departing from the scope and spirit of the described embodiments. The terms used herein were chosen in order to best explain the principles of the embodiments, the practical application, or technical improvements to the techniques in the marketplace, or to enable others of ordinary skill in the art to understand the embodiments disclosed herein.
Claims (8)
1. A lighting device for lighting at least one light source unit, the lighting device comprising:
a lighting circuit configured to supply a current to the light source unit;
a control circuit configured to perform dimming control on the lighting circuit so as to dim the light source unit; and
a receiving section configured to receive a control signal indicating a user state from outside,
wherein the dimming control comprises a sleep-aid control,
the control circuit controls the lighting circuit so that a value of the current supplied from the lighting circuit to the light source unit changes to increase and decrease during the sleep-assist control, and when the control signal received by the receiving unit indicates that the user is in a first state in which the user is closer to a sleep-in state than in a second state, an average value of the current supplied from the lighting circuit to the light source unit is decreased than when the control signal received by the receiving unit indicates that the user is in the second state,
the decrease in the average value of the current supplied from the lighting circuit to the light source unit includes a decrease in both the maximum value and the minimum value of the current supplied from the lighting circuit to the light source unit, or a decrease in the maximum value and a constant minimum value of the current supplied from the lighting circuit to the light source unit,
in performing the sleep-assist control, a guidance period in a change in a current supplied from the lighting circuit to the light source unit is a period before the current starts to rise from a present minimum value to a next minimum value, in which the current increases from the minimum value to the maximum value and then decreases to the minimum value,
the guiding time period is extended in stages as the user gets closer to the sleep-in state, and the guiding time period in the change of the current supplied from the lighting circuit to the light source unit is in the range of 3 seconds to 3.75 seconds when the sleep-aid control is performed,
a transition period is provided between a period in which the guidance period is a first value and a period in which the guidance period is a second value, within which the guidance period is changed stepwise from the first value to the second value,
in the early stage of the sleep-aid control, the waveform of the current is a triangular wave or a rectangular wave, and when it is determined that the user is close to the sleep-aid state, the waveform of the current is adjusted to a sine wave.
2. The lighting device according to claim 1, wherein in the first state, a user breathes less per minute, or a user arterial beats less per minute, or a user's body temperature is lower, or a user's blood pressure is lower than in the second state.
3. The lighting device according to claim 1, wherein the guidance period in the entire sleep-aid control includes a plurality of or all of 3 seconds, 3.16 seconds, 3.33 seconds, 3.53 seconds, 3.75 seconds.
4. The lighting device according to claim 1, wherein the control signal includes a number of breaths per minute of a user,
the control circuit sets the lead time period to 60/(user's breaths per minute-1) seconds.
5. The lighting device according to claim 1 or 2, wherein in a case where it is judged from the control signal that the number of breaths per minute, the pulse rate, the body temperature, or the blood pressure of the user decreases to a predetermined value or decreases and then remains unchanged for a predetermined time, the control circuit judges that the user enters a sleep-in state and controls the current supplied from the lighting circuit to the light source unit to a value at which the light source unit cannot be lit.
6. A lighting fixture, comprising:
the lighting device according to any one of claims 1 to 5; and
the at least one light source unit.
7. An illumination system, comprising:
the lighting fixture of claim 6; and
a human body state acquisition device configured to detect a user state and transmit a control signal representing the user state to the receiving part of the lighting device.
8. The lighting system according to claim 7, wherein the human state acquisition device comprises at least one of a device for detecting a number of breaths per minute of the user, a device for detecting a pulse rate of the user, a device for detecting a body temperature of the user, and a device for detecting a blood pressure of the user, and the control signal indicative of the state of the user is determined based on the detected at least one of the number of breaths per minute of the user, the pulse rate, the body temperature, and the blood pressure.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201711277107.0A CN109890109B (en) | 2017-12-06 | 2017-12-06 | Lighting device, lighting fixture, and lighting system |
| JP2018204923A JP7117635B2 (en) | 2017-12-06 | 2018-10-31 | Lighting devices, luminaires and lighting systems |
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| CN201711277107.0A CN109890109B (en) | 2017-12-06 | 2017-12-06 | Lighting device, lighting fixture, and lighting system |
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| CN109890109B true CN109890109B (en) | 2021-12-21 |
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| CN114585132B (en) * | 2020-11-30 | 2023-11-24 | 松下电气机器（北京）有限公司 | Lighting device, lighting system, and dimming control method for lighting device |
| CN116747405A (en) * | 2023-06-17 | 2023-09-15 | 光汇未来(东莞)智能科技有限公司 | Breathing lamp control method and breathing lamp |
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| JP2019102440A (en) | 2019-06-24 |
| JP7117635B2 (en) | 2022-08-15 |
| CN109890109A (en) | 2019-06-14 |
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