CN114585132B - Lighting device, lighting system, and dimming control method for lighting device - Google Patents
Lighting device, lighting system, and dimming control method for lighting device Download PDFInfo
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- CN114585132B CN114585132B CN202011376067.7A CN202011376067A CN114585132B CN 114585132 B CN114585132 B CN 114585132B CN 202011376067 A CN202011376067 A CN 202011376067A CN 114585132 B CN114585132 B CN 114585132B
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- 238000000034 method Methods 0.000 title claims description 14
- 230000000087 stabilizing effect Effects 0.000 claims abstract description 28
- 230000000630 rising effect Effects 0.000 claims abstract description 5
- 230000008859 change Effects 0.000 claims description 37
- 230000007423 decrease Effects 0.000 claims description 12
- 230000000737 periodic effect Effects 0.000 claims description 11
- 230000029058 respiratory gaseous exchange Effects 0.000 claims description 6
- 230000009467 reduction Effects 0.000 claims description 5
- 230000036772 blood pressure Effects 0.000 claims description 4
- 230000036760 body temperature Effects 0.000 claims description 4
- 238000005286 illumination Methods 0.000 claims description 4
- 230000006641 stabilisation Effects 0.000 claims description 3
- 238000011105 stabilization Methods 0.000 claims description 3
- 238000006467 substitution reaction Methods 0.000 description 38
- 230000000694 effects Effects 0.000 description 12
- 230000003247 decreasing effect Effects 0.000 description 8
- 230000033764 rhythmic process Effects 0.000 description 8
- 238000010586 diagram Methods 0.000 description 5
- 230000007704 transition Effects 0.000 description 5
- 230000001427 coherent effect Effects 0.000 description 4
- 238000012423 maintenance Methods 0.000 description 3
- 230000004048 modification Effects 0.000 description 3
- 238000012986 modification Methods 0.000 description 3
- 230000009471 action Effects 0.000 description 2
- 230000008451 emotion Effects 0.000 description 2
- 238000002474 experimental method Methods 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 206010062519 Poor quality sleep Diseases 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008033 biological extinction Effects 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 238000011156 evaluation Methods 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 230000003860 sleep quality Effects 0.000 description 1
- 230000000638 stimulation Effects 0.000 description 1
- 230000000007 visual effect Effects 0.000 description 1
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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B47/00—Circuit arrangements for operating light sources in general, i.e. where the type of light source is not relevant
- H05B47/10—Controlling the light source
- H05B47/105—Controlling the light source in response to determined parameters
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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B47/00—Circuit arrangements for operating light sources in general, i.e. where the type of light source is not relevant
- H05B47/10—Controlling the light source
- H05B47/175—Controlling the light source by remote control
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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B47/00—Circuit arrangements for operating light sources in general, i.e. where the type of light source is not relevant
- H05B47/10—Controlling the light source
- H05B47/175—Controlling the light source by remote control
- H05B47/19—Controlling the light source by remote control via wireless transmission
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B20/00—Energy efficient lighting technologies, e.g. halogen lamps or gas discharge lamps
- Y02B20/40—Control techniques providing energy savings, e.g. smart controller or presence detection
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Abstract
The invention aims to provide a lighting device, which can solve the problem that when helping a user to enter a sleep state, the lighting device is unfavorable for guiding the user to enter a relaxed sleep state due to the fact that the dimming of a light source unit is abrupt. The lighting device of the invention comprises at least one light source unit and a lighting circuit, wherein the lighting circuit outputs periodically-changed output current to the light source unit in a mode that the light source unit is periodically changed from light to dark and from dark to light, a current rising section and a current reducing section are included in one period of the periodically-changed output current output by the lighting circuit, and a valley stabilizing current section for outputting stabilizing current is also included between the current period and the next period of the output current.
Description
Technical Field
The present invention relates to the field of lighting, and in particular, to a lighting device with a sleep-aiding effect, a lighting system, and a dimming control method for the lighting device.
Background
With the increase of the pace and pressure of modern life and work, more and more people have the problem of lower sleep quality, in particular the problem of difficult quick sleep.
To solve this problem, for example, chinese patent publication CN109890109a proposes a lighting fixture and a lighting system according to which, at the time of performing sleep-aiding control, it is proposed to control a lighting circuit by a control circuit so that a change in current value supplied from the lighting circuit to a light source unit is increased and decreased, to periodically lighten and dim light emission of the light source unit in a form in which the light source unit is lightened and dimmed with the change in current value is increased and decreased, to improve the emotion of a user, and to guide the user to a meditation state, so that a sleep state can be effectively entered.
However, as shown in fig. 1, in the above conventional technique, the output current value of the lighting circuit is raised immediately after the output current of the lighting circuit is lowered to a predetermined minimum value. Accordingly, the light emission of the light source unit immediately enters the dimming link and rises to the predetermined brightest value after being dimmed to the predetermined minimum value without any excessive. Therefore, as a user, a larger amplitude of brightness change is perceived in the shorter period of time, and the brightness change rhythm of the previous period is not adapted, so that the brightness change of the next period is directly entered, and the user feels abrupt and is unfavorable for the maintenance of the sleep state.
On the other hand, as shown in fig. 2, in the prior art, since the lowest point of the brightness of the light source unit is set to be completely turned off, the light source unit is suddenly turned off and suddenly turned on, so that the user can feel a large brightness change in a short period of time, and feel abrupt in emotion, which is unfavorable for maintaining the sleep state.
Disclosure of Invention
The invention aims to provide a lighting device, which can solve the problem that when helping a user to enter a sleep state, the lighting device is unfavorable for guiding the user to enter a relaxed sleep state due to the fact that the dimming of a light source unit is abrupt.
The lighting device of the invention comprises at least one light source unit and a lighting circuit, wherein the lighting circuit outputs periodically-changed output current to the light source unit in a mode that the light source unit is periodically changed from light to dark and from dark to light, a current rising section and a current reducing section are included in one period of the periodically-changed output current output by the lighting circuit, and a valley stabilizing current section for outputting stabilizing current is also included between the current period and the next period of the output current.
According to the technical scheme of the invention, after the current reducing section output by the lighting circuit, the valley stabilizing current section for outputting stabilizing current is arranged. Therefore, after the light source unit is dimmed to a predetermined minimum brightness value as the output current of the current decreasing section decreases, the minimum brightness value is maintained for a prescribed time because the lighting circuit continues to output the stabilizing current in the valley stabilizing current section, and then the current increasing section is entered to lighten the brightness of the light source unit. Therefore, the user can continue to experience the sense of substitution during dimming of the light source unit while maintaining the relaxed meditation state without feeling a large-amplitude brightness change within a period of time to destroy the sense of substitution. Meanwhile, the illumination unit keeps the minimum brightness value for a set time to serve as transition due to the arrangement of the valley stabilizing current section, so that the user can directly enter the brightness change of the next period without adapting to the brightness change rhythm of the previous period, the user can keep continuity and continuity in experience, and the maintenance of a relaxation sleep state is facilitated to help the user to sleep as soon as possible.
In a preferred embodiment of the present invention, the output current in the valley stable current section of the lighting device may at least maintain the lighting of the light source unit. Therefore, in the periodic variation of the light source unit from light to dark and from dark to light, the light source unit of the lighting device is not completely extinguished. The lighting device is not turned on from off to on, and then is turned on to off, so that strong stimulation is not generated to the user, and the substitution sense of the previous period can be maintained, thereby better helping sleep.
Further, in the preferred technical solution of the present invention, the output current in the valley stable current section of the lighting device is a current value capable of enabling the light source unit to maintain the lowest brightness value, so that the lighting device reaches the lowest brightness value without being completely extinguished. Because the brightness of the light source unit decreases as the output value of the current decreases, but cannot be changed steplessly to off, i.e., when the brightness reaches a certain critical value (minimum brightness value), the light source unit cannot be dimmed any more and jumps directly to off. Therefore, the light source unit is maintained at the minimum brightness value, the brightness change of the light source unit is ensured, and meanwhile, the light source unit is not suddenly turned off or turned on, so that a user can feel the substitution sense of breaking the sleep due to the larger brightness change.
In a preferred embodiment of the present invention, the lighting circuit of the lighting device is configured to maximize the brightness L of the light source unit in a certain period 1 And the lowest brightness L 2 The relation of (2) satisfiesThe maximum output current value in the period of the output current and the output current value in the valley stable current section are determined by the conditional mode. The brightness variation range of the light source unit should be as large as possible to better provide the user with a sense of substitution to go to sleep. Experimental results show that the highest brightness L of the light source unit 1 And the lowest brightness L 2 The relation of (2) satisfies->And when the sleep-aiding device is used, a stronger substitution sense can be brought to a user, and a better sleep-aiding effect is achieved.
In the off-peak stable current section in the preferred technical scheme of the invention, the lighting circuit of the lighting device maintains stable output current for a specified time, so that the light source unit maintains the minimum brightness for a certain time, the dimming and the dimming of the light source unit cannot be changed greatly in a shorter time period, and a user can keep coherent and continuous experience.
Preferably, in a preferred embodiment of the present invention, the duration t of one cycle of the output current 1 The duration t of the valley stable current period adjacent to the period 2 The relationship between them is in accordance with In the preferred embodiment, t 2 And t 1 The length relation of the (2) is related, so that comfort and continuity of user experience can be better ensured, and in addition, experimental results show that the (4) is in the (I)>In the range of (2), the duration change is matched with the deep breathing rhythm of the user, so that the user has a strong substitution sense of entering sleep, and the lighting device can have a good sleep-aiding effect.
Further, in the preferred technique of the inventionIn the operation scheme, the duration t of one period of the output current 1 Duration t of the off-peak steady current period 2 Either or both of which vary with the timing of the periodically varying output current. Concretely, t is 1 And t 2 Either or both of the durations are gradually prolonged along with the time sequence of the periodically-changing output current, and the light changes gradually so as to correspond to the gradual sleeping state of the user, thereby being more beneficial to gradually guiding the user to enter the sleeping state.
Preferably, in a preferred technical solution of the present invention, the lighting circuit outputs the current to the light source unit in such a manner that the periodic average value of the output current gradually decreases, so that the average brightness of the light source unit is periodically gradually decreased, thereby gradually decreasing the change of the brightness of the light source unit, and enabling the user to gradually relax and naturally transition to the sleep state.
In a preferred technical scheme of the invention, the lighting device further comprises a control circuit and a user state information receiving unit, wherein the control circuit outputs a dimming control signal to the lighting circuit; the user state information receiving unit receives user state information indicating a user state from outside and outputs to the control circuit. Therefore, the lighting device can obtain feedback of the relevant state information of the user through the control circuit and the user state information receiving unit, and adjust the brightness of the light source unit according to the feedback of the relevant state information of the user, so that the brightness adjustment of the light source unit is further adapted to the real-time state of the user, and the user can be guided to fall asleep more naturally and comfortably.
Further, the user status information in the preferred embodiment of the present invention at least includes any one or more of information of the number of times of breathing, pulse rate, body temperature or blood pressure changes of the user. Therefore, the brightness of the light source unit can be correspondingly adjusted according to different real-time physical state data of the user so as to adapt to different requirements of different users.
In the preferred technical scheme of the invention, in the valley stable current section, the output current has fluctuation, the peak value of the output current fluctuation is less than or equal to 1/4 of the maximum output current value in one period of the output current, and the valley value of the output current fluctuation is greater than or equal to the current value of the light source unit for maintaining the minimum brightness value. The output current of the valley stabilizing current section is not strictly limited to a constant current value, and can also have fluctuation, so long as the peak value of the fluctuation does not exceed 1/4 of the maximum output current value, and the valley value is not lower than the current value of the light source for maintaining the minimum brightness, thereby effectively ensuring the sleep-aiding effect.
The invention also provides a lighting system which comprises the lighting device and a user state information acquisition device. The user state information acquisition device acquires user state information and sends the acquired user state information to the user state information receiving unit of the lighting device. Therefore, the brightness change and the brightness change period of the light source unit of the lighting system can be correspondingly adjusted in real time according to the real-time state data of the user, so that the substitution sense of the user is enhanced, and the user is helped to enter the sleep state more quickly and comfortably.
Preferably, the present invention also provides a dimming control method of a lighting device for adjusting a lighting circuit of the lighting device to output a current to a light source unit to adjust a dimming change of the light source unit, comprising the steps of:
an output current rise adjusting step S1 of increasing an output current of the lighting circuit to the light source unit to increase the brightness of the light source unit up to a prescribed peak value;
an output current reduction adjustment step S2 of reducing an output current of the lighting circuit to the light source unit to reduce the luminance of the light source unit up to a prescribed valley value;
and an output current stabilizing adjustment step S3, wherein when the output current reducing adjustment step S2 is finished, the output current value when the brightness of the light source unit is a prescribed valley value is used as the valley stabilizing current and is output for a prescribed time.
After the output current stabilization adjustment step S3 is performed, the output current increase adjustment step S1 is performed again.
Through the steps, the dimming control method of the lighting device can smoothly and continuously adjust the brightness change of the light source unit by adjusting the output current, so that the larger brightness change is avoided in a shorter period of time, a user can keep stronger substitution sense, and the user can gradually and stably enter a sleep state.
Drawings
FIG. 1 is a schematic diagram of current output of a prior art lighting device in a sleep-aiding mode;
FIG. 2 is a schematic diagram of the current output of another prior art lighting device in a sleep-aiding mode;
FIG. 3 is a schematic view of a lighting device provided in one embodiment of the invention;
FIG. 4 is a schematic diagram of the periodic variation of the output current of the lighting circuit 2 according to one embodiment of the present invention;
fig. 5 is a schematic view showing a periodic variation of brightness of a light source unit 3 according to an embodiment of the present invention;
FIG. 6 is a schematic view of a lighting device provided in another embodiment of the invention;
FIG. 7 is a schematic view of an illumination system provided in another embodiment of the present invention;
fig. 8 is a schematic diagram of a dimming control method of a lighting device according to another embodiment of the present invention.
Reference numerals illustrate: 1-lighting device, 2-lighting circuit, 21-current rising section, 22-current reducing section, 23-valley stable current section, 3-light source unit, 4-control circuit, 5-user state information receiving unit, 6-lighting system, 7-user state information collecting device.
Detailed Description
Preferred embodiments of the present invention are described below with reference to the accompanying drawings. It should be understood by those skilled in the art that these embodiments are merely for explaining the technical principles of the present invention, and are not intended to limit the scope of the present invention. Those skilled in the art can make adjustments as needed to suit a particular application.
It should be noted that, in the description of the present invention, terms such as "outer," "inner," "upper," "lower," "front," "rear," and the like, which indicate positional relationships are based on the directions or positional relationships shown in the drawings, are merely for the purpose of facilitating a more visual understanding of the present invention by those skilled in the art, and do not indicate or imply that the devices or components must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the present invention.
Example 1
Fig. 3 is a schematic structural view of a lighting device according to a first embodiment of the present invention. Referring to fig. 3, in the present embodiment, there is provided a lighting device 1, the lighting device 1 including at least one light source unit 3 and a lighting circuit 2. The lighting circuit 2 is connected to the light source unit 3, and outputs a periodically-varying output current to the light source unit 3 in such a manner that the light source unit 3 periodically varies from light to dark, from dark to light.
Fig. 4 is a schematic diagram of the periodic variation of the output current of the lighting circuit 2 in this embodiment, in which the abscissa indicates time and the ordinate indicates the current value, and the ordinate indicates the current value in terms of a proportion to the maximum current, in terms of a percentage, for convenience. As shown in fig. 4, in which the output current is periodically changed at one period t of the output current of the lighting circuit 2 1 The current-raising section 21 and the current-lowering section 22 are included, and the valley-stabilizing current section 23 for outputting a stabilizing current is included between the present period and the next period of the output current.
According to the above embodiment, as shown in fig. 5, fig. 5 is a schematic view of the periodic variation of the luminance of the light source unit 3, in which the abscissa represents time and the ordinate represents the light emission luminance of the light source unit 3, and the ordinate is relative to the highest luminance L for convenience sake 1 Is replaced by a percentage to represent the brightness. The light source unit 3 is dimmed to a predetermined minimum brightness L as the output current of the current reduction section 22 is reduced 2 After that, the lighting circuit 2 keeps outputting the stable current in the valley stable current section 23 to maintain the minimum brightness L 2 Set time t 2 The current rising section 21 of the next cycle is then entered to increase the output current to highlight the brightness of the light source unit 3. Therefore, the user can stabilize the current period 23 at the valley for the corresponding period t 2 Stage of continuationThe light source unit 3 experiences a sense of substitution of guidance in the dimming process to maintain a relaxed meditation state, and does not feel a large-amplitude brightness change in an extremely short period of time to destroy the sense of substitution of guidance. At the same time, the light source unit 3 maintains the minimum luminance L due to the arrangement of the valley stabilizing current section 23 2 Set time t 2 As a transition, the light and shade change of the next period can be directly entered without causing the user to adapt to the light and shade change rhythm of the previous period, so that the user can keep coherent and continuous in experience, and the maintenance of a sleep state is facilitated to help the user to sleep as soon as possible.
As described above, the first cycle of the current waveform and the luminance waveform in fig. 4 and 5 is described, and the waveform change trend and the effect achieved in each cycle thereafter are the same as those in the first cycle with time series until the sleep-aiding mode is completed, and the light source unit 3 is turned off. And will not be described in detail herein.
In the first embodiment of the present invention, the first period of the current waveform and the luminance waveform is exemplified by 100% as the peak value, but the peak value of the first period is not limited to this, and may be set to an appropriate value such as 80% or 60% instead of 100%.
Meanwhile, in the first embodiment of the present invention, the output current value to the valley stable current section 23 and the lowest luminance L of the light source unit 3 2 There is no particular limitation as long as it is lower than the current output peak of the next cycle or the luminance peak of the next cycle.
Example two
As a preferred embodiment of the present invention, the second embodiment of the present invention is different from the first embodiment of the present invention in that the lighting circuit 2 can maintain at least the lighting of the light source unit 3 at the output current of the valley stable current section 23. Other circuit structures, output currents and brightness waveforms of the light source unit 3 are the same as those of the first embodiment, and will not be described here again.
According to the second embodiment of the present invention, since the power is turned onThe output current value of the circuit 2 in the valley stable current section 23 can maintain at least the lighting of the light source unit 3, so that the circuit is turned on in the period t corresponding to the valley stable current section 23 2 The light source unit 3 can be kept at least at a minimum, and is not completely turned off. So that the light source unit 3 is not completely extinguished in the entire light-to-dark, dark-to-light periodic variation. Therefore, the light source unit 3 can be prevented from being turned on to off and then turned off to on, and the user can feel a strong change in brightness, and the sense of substitution of guidance by the user can be destroyed.
Further, in the lighting device 1 of the present embodiment, the output current of the lighting circuit 2 in the valley stable current section 23 is such that the light source unit 3 maintains the minimum luminance L 2 Is set in the above-described range). Because the brightness of the light source unit 3 cannot be steplessly changed until it is turned off, i.e., when the brightness reaches a certain critical value (e.g., the lowest brightness L 2 ) At this time, the light source unit 3 cannot be dimmed any more, but jumps from the lit state to the extinguished state. Thus, the minimum brightness L is maintained 2 The current value of (2) can make the light source unit 3 maintain the minimum brightness L without completely extinguishing 2 The user does not feel a bright-dark change with a large amplitude when the light source unit 3 is turned off for a short time and turned on again.
Example III
In the third embodiment, based on the first embodiment and the second embodiment of the present invention, a further preferred embodiment relates to the circuit structure of the lighting device 1, the output current, and the brightness waveform of the light source unit 3, which are the same as those of the first or second embodiment, and are not described herein.
In the present embodiment, the circuit 2 is turned on so that the highest luminance L of the light source unit 3 1 And the lowest brightness L 2 The maximum output current value in one cycle of the output current of the lighting circuit 2 and the output current in the valley stable current section 23 are determined and outputted so that the relationship of (a) satisfies a predetermined numerical ratio. The following data were obtained through experiments:
| L 2 /L 1 | 0 | 0.13％ | 0.4％ | 1％ | 1.33％ | 25％ | 50％ |
| guiding substitution sense | Weak and weak | Strong strength | Strong strength | Strong strength | In (a) | Weak and weak | Without any means for |
Guiding substitution sense strong and weak: strong, medium, weak
The sense of guidance substitution is an evaluation index that helps the user to sleep as soon as possible, specifically, the degree of action that the user is guided to sleep by the luminance change rhythm of the light source unit 3, when the luminance change cycle of the light source unit 3 matches the change cycle of the user's physiological index, as the sense of guidance substitution is the same as the sense of guidance substitution defined in the first and second embodiments. The more the guiding substitution feeling is stronger, the more easily the user can enter a sleep state, the better the sleep aiding effect is, and the poor sleep aiding effect is otherwise.
From the above experimental data, it is known that, in the luminance change period of the light source unit 3, the luminance is When the user basically hardly perceives the sense of guidance substitution. But at->At this time, the user starts to have a certain sense of guidance substitution, and the sense of guidance substitution of the user follows L 2 /L 1 Is reduced in proportion to the step-up. And L is 2 /L 1 The ratio of (2) is reduced to +.>When (I)>Time (I) and (II)>In this case, the user can generate a strong sense of guidance substitution. However, L 2 /L 1 The ratio of (2) cannot be infinitely reduced when L 2 /L 1 When the ratio of (2) is reduced to 0, that is, the light source unit 3 is completely turned off, the apparent change in brightness may rather destroy the sense of substitution of the guidance of the user.
Therefore, in practical application, in order to make the user feel a certain sense of guidance substitution, L 2 /L 1 The ratio of (2) should be up toFurthermore, in order to enable the lighting device 1 to have a better sleep-aiding effect, the present embodiment is preferably +.>The above +.>Is->Equal numerical proportions.
On the other hand, in the present embodiment, when the lighting device 1 is in the valley steady current section 23, the lighting circuit 2 needs to maintain the steady output current for a predetermined time, and the light source unit 3 maintains the minimum luminance L for a predetermined time 2 So that the brightness of the light source unit 3 does not vary greatly in a short period of time, so that the user can remain experienced coherent and continuous.
Further, in the present embodiment, the duration t of one cycle of the output current of the lighting circuit 2 1 The duration t of the valley stabilizing current section 23 adjacent to the period 2 A certain numerical ratio should be satisfied. The following data were obtained by experiment:
guiding substitution sense strong and weak: strong, medium, weak
From the above experimental data, the duration t of one period of the output current 1 The duration t of the valley stabilizing current section 23 adjacent to the period 2 A relationship between the ratio of (2) and the sense of guidance substitution of the user. Namely t 2 /t 1 At a ratio of 0.05, the user does not feel substantially any sense of guide substitution; then t 2 /t 1 Is gradually increased in proportion of t 2 /t 1 When the value is increased to 0.1, the user starts to feel a certain guidance substitution sense, and the guidance substitution sense of the user follows t 2 /t 1 Increasing to gradually increase; when t 2 /t 1 Is increased to a peak, i.e. t 2 /t 1 When the value is 0.33, the guidance substitution sense of the user is strongest; after the peak value, i.e. 0.33 < t 2 /t 1 When < 2, the userThe sense of substitution with guidance follows t 2 /t 1 Increase and tend to decrease; when t 2 /t 1 The ratio of (2) is 2.5 or more, and the sense of substitution by the user is substantially reduced. From this, it can be seen that the duration t of one cycle of the output current 1 The duration t of the valley stabilizing current section 23 adjacent to the period 2 The ratio of the number of the users is too large or too small, and the guidance substitution feeling of the users cannot be realized to a certain extent, so that the sleep-aiding effect is affected. As can be seen from the analysis of the above data, when t is 0.1.ltoreq.t 2 /t 1 Not more than 2, i.eWhen the user is in sleep, the user can keep a certain guiding substitution sense, and a good sleep-aiding effect can be achieved. Preferably at t 2 /t 1 When the value is 0.33, the guiding substitution feeling of the user is strongest, and the sleep aiding effect is optimal.
Still further as a preferred embodiment, the duration t of one cycle of the output current 1 The duration t of the valley stabilizing current section 23 adjacent to the period 2 May vary with the timing of the periodically varying output current. As can be seen from fig. 4 (part of the waveform segment is omitted in fig. 4), in the present embodiment, t 1 、t 2 The output current gradually increases along with the time sequence of the periodical change, so that the brightness and brightness change rhythm of the light source unit 3 is slowed down to adapt to the deep breathing rhythm that the user gradually enters the body relaxation stage and deepens and lengthens, and the user is gradually guided to enter the sleep state.
As a preferred example, the lighting device 1 provided in the embodiment of the present invention outputs the current to the light source unit 3 in such a manner that the periodic average value of the output current gradually decreases, so that the average luminance of the light source unit 3 is periodically gradually decreased, thereby gradually decreasing the brightness change of the luminance of the light source unit 3, further gradually making the user feel relaxed, and naturally transition to the sleep state.
As another preferred example, in an embodiment of the present invention, the lighting device 1 further comprises a control circuit 4 and a user status information receiving unit 5.
As shown in fig. 6, the control circuit 4 is connected to the lighting circuit 2 and the user state information receiving unit 5, respectively, and is capable of receiving information transmitted from the user state information receiving unit 5 and outputting a dimming control signal to the lighting circuit 2; the user state information receiving unit 5 is connected to the control circuit 4, and can receive user state information indicating a user state from outside the lighting apparatus 1 and output the user state information to the control circuit 4. Under the combined action of the control circuit 4 and the user state information receiving unit 5, the lighting device 1 can receive the user state information representing the user state, and adjust the output current of the lighting circuit 2 in real time according to the user state, so as to adjust the brightness change of the light source unit 3 and the duration of the brightness change, so that the lighting device is better suitable for the real-time state of the user, and therefore, the user can be guided to enter the sleep state in a more natural and comfortable rhythm.
In addition, the brightness of the light source unit 3 can be correspondingly adjusted according to different real-time body data of the user so as to adapt to different requirements of different users. In addition, in some embodiments of the present invention, the control circuit 4 and the user status information receiving unit 5 may also be located outside the lighting device 1, that is, connected to the lighting device 1 by an external component through a wired or wireless manner, so as to achieve the same function, which is not described herein.
Further as a preferred example, in the embodiment of the present invention, the user state information receiving unit 5 in the lighting device 1 can receive user real-time state information including at least any one or more of information of the respiration rate, pulse rate, body temperature or blood pressure change of the user. Clinically, the respiration, pulse rate, body temperature and blood pressure are called as four basic vital signs of a human body, and the four basic vital signs can reflect the physical state of a user to a certain extent, so that the lighting device 1 receives and knows the real-time physical state of the user, and adjusts the brightness and the duration of lighting accordingly. For example, the fewer the number of times the user breathes in a certain period of time, the deeper the user's deep breath, the longer the duration of each deep breath, and the more relaxed the user's state, the user may be determined to be in the process of entering a sleep state, or to have entered a sleep state.
Example IV
Referring to fig. 7, a lighting system 6 is also provided in a fourth embodiment of the present invention. The lighting system 6 in the fourth embodiment includes the lighting device 1 and the user state information collection device 7 related to the respective embodiments described above. The user state information acquisition device 7 is connected to the user state information receiving unit 5 in the lighting device 1, and is capable of acquiring user state information and transmitting the acquired user state information to the user state information receiving unit 5. Therefore, the lighting device 1 can adjust the brightness and time of the lighting unit 3 according to the real-time state of the user so as to adapt to different use requirements of different users. Meanwhile, such an illumination system 6 can also solve the problem that the user is not led to enter a relaxed sleep state due to the abrupt dimming of the light source unit 3 while helping the user enter the sleep state.
Example five
In a fifth embodiment of the present invention, there is also provided a dimming control method of a lighting device 1 for adjusting an output current of a lighting circuit 2 of the lighting device 1 to a light source unit 3 to adjust a dimming change of the light source unit 3, which can be applied to dimming control of the lighting device 1 in various embodiments of the present invention, the specific steps of which are as shown in fig. 8:
an output current rise adjusting step S1 of increasing an output current of the lighting circuit to the light source unit to increase the brightness of the light source unit up to a prescribed peak value;
an output current reduction adjustment step S2 of reducing an output current of the lighting circuit to the light source unit to reduce the luminance of the light source unit up to a prescribed valley value;
and an output current stabilizing adjustment step S3, wherein when the output current reducing adjustment step S2 is finished, the output current value when the brightness of the light source unit is a prescribed valley value is taken as the valley stabilizing current, and the output is maintained for a prescribed time.
After the output current stabilization adjustment step S3 is performed, the output current increase adjustment step S1 is performed again.
Through the above steps, the dimming control method provided in the present embodiment can output a current to the light source unit 3 by adjusting the lighting circuit 2 to adjust the light-shade variation of the luminance of the light source unit 3 so that the light-shade variation of the luminance of the light source unit 3 is gentle and coherent, without generating a large light-shade variation involving extinction and lighting in a short period of time. Therefore, the dimming control method can keep the substitution feeling of the user at a strong level all the time, and quickly and comfortably enable the user to transition to the sleep state.
In the above embodiment, the current value of the valley steady current section is set to a constant value, but in other embodiments of the present invention, the output current may have a ripple. Specifically, the peak value of the output current fluctuation may be 1/4 or less of the maximum output current value in one period of the output current, and the valley value of the output current fluctuation may be equal to or greater than the current value at which the light source unit maintains the lowest luminance value. By configuring the output current to fluctuate within the above-mentioned interval, this fluctuation pattern does not deteriorate or destroy the sleep-aiding effect, and thus similar simple modification or replacement of the specific form of the output current of the valley-stabilized current section should be included in the scope of the present invention without exceeding the gist of the present invention by the technical scheme itself.
Further, the terms "current increasing section" and "current decreasing section" do not mean that the output current must strictly monotonically increase or monotonically decrease during this period. For example, in some embodiments, a brief or temporary decrease in output current may also be tolerated in the current boost segment, provided that it does not decrease by more than 40% of the periodic maximum output current value and the current decrease corresponds to a luminance decrease by more than 20 lux. Similarly, a brief or temporary increase in the output current may be tolerated in the current reduction section, provided that the increase does not exceed 40% of the maximum output current value of the cycle and the corresponding increase in brightness does not exceed 20 lux.
Thus far, the technical solution of the present invention has been described in connection with the accompanying drawings, but it is easily understood by those skilled in the art that the scope of protection of the present invention is not limited to these specific embodiments. Equivalent modifications and substitutions for related technical features may be made by those skilled in the art without departing from the principles of the present invention, and such modifications and substitutions will fall within the scope of the present invention.
Claims (11)
1. A lighting device, comprising:
at least one light source unit;
a lighting circuit that outputs a periodically varying output current to the light source unit in a form such that the light source unit varies periodically from light to dark and from dark to light,
the periodic variable output current comprises a current rising section and a current reducing section, and a valley stabilizing current section for outputting stabilizing current between the current period and the next period of the output current;
the duration t of one period of the output current 1 The duration t of the valley stabilizing current period adjacent to the period 2 The following formula condition is satisfied,
0.25t 1 ≤t 2 ≤1.24t 1 ；
the duration t of one period of the output current 1 Varying with the timing of the periodically varying output current;
the duration t of the valley stable current section 2 Varying with the timing of the periodically varying output current;
the lighting circuit outputs a current to the light source unit so that a periodic average value of the output current gradually decreases.
2. A lighting device as recited in claim 1, wherein,
the output current in the valley stabilizing current section may maintain at least the lighting of the light source unit.
3. A lighting device as recited in claim 2, wherein,
the output current in the valley stabilizing current section is a current value such that the light source unit maintains a lowest luminance value.
4. A lighting device as recited in claim 2, wherein,
a lighting circuit for lighting the highest brightness L of the light source unit 1 And the lowest brightness L 2 In the form of satisfying the following expression condition, determining and outputting a maximum output current value in one period of the output current and the output current value in the valley stable current section,
5. a lighting device as recited in any one of claims 1-3 or 4, wherein,
in the valley stabilizing current section, the lighting circuit maintains a stable output current for a fixed time.
6. A lighting device as recited in any one of claims 1-3, wherein,
further comprises:
a control circuit that outputs a dimming control signal to the lighting circuit;
and a user state information receiving unit for receiving user state information representing the user state from the outside and outputting the user state information to the control circuit.
7. A lighting device as recited in claim 6, wherein,
the user state information at least comprises any one or more of information of breathing times, pulse rate, body temperature or blood pressure changes of the user.
8. A lighting device as recited in any one of claims 1-3 or 4, wherein in said valley steady current period said output current has a ripple and a peak value of said output current ripple is less than or equal to 1/4 of a maximum output current value in one period of said output current, a valley value of said output current ripple being greater than or equal to a current value at which said light source unit maintains a minimum luminance value.
9. An illumination system, comprising,
a lighting device as claimed in any one of claims 6 to 7;
and the user state information acquisition device acquires the user state information and sends the acquired user state information to the user state information receiving unit.
10. A dimming control method of a lighting device for adjusting an output current of the lighting circuit of the lighting device according to any one of claims 1 to 8 to a light source unit to adjust a dimming change of the light source unit, comprising,
an output current rise adjusting step S1 of increasing an output current of the lighting circuit to the light source unit to raise the luminance of the light source unit up to a prescribed peak value;
an output current reduction adjustment step S2 of reducing an output current of the lighting circuit to the light source unit to reduce the brightness of the light source unit up to a prescribed valley value;
and an output current stabilizing adjustment step S3 of setting an output current value at the end of the output current reducing adjustment step S2 when the brightness of the light source unit is a prescribed valley value as a valley stabilizing current and maintaining the output for a prescribed time.
11. The dimming control method of a lighting device according to claim 10, wherein the output current rise adjusting step S1 is performed again after the output current stabilization adjusting step S3 is performed.
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