CN117500115A - Luminosity adjustable LED lighting system based on physiological signals - Google Patents

Luminosity adjustable LED lighting system based on physiological signals Download PDF

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Publication number
CN117500115A
CN117500115A CN202311585037.0A CN202311585037A CN117500115A CN 117500115 A CN117500115 A CN 117500115A CN 202311585037 A CN202311585037 A CN 202311585037A CN 117500115 A CN117500115 A CN 117500115A
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CN
China
Prior art keywords
led lamp
adjusting module
signal
outputting
lamp group
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CN202311585037.0A
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Chinese (zh)
Inventor
张缘
曾庆子
熊建
曾庆龙
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Shenzhen Purple Lighting Technology Co ltd
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Shenzhen Purple Lighting Technology Co ltd
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Priority to CN202311585037.0A priority Critical patent/CN117500115A/en
Publication of CN117500115A publication Critical patent/CN117500115A/en
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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
    • 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
    • H05B45/00—Circuit arrangements for operating light-emitting diodes [LED]
    • H05B45/10—Controlling the intensity of the light
    • 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
    • H05B45/00—Circuit arrangements for operating light-emitting diodes [LED]
    • H05B45/10—Controlling the intensity of the light
    • H05B45/12—Controlling the intensity of the light using optical feedback
    • 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
    • H05B45/00—Circuit arrangements for operating light-emitting diodes [LED]
    • H05B45/20—Controlling the colour of the light
    • 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
    • H05B45/00—Circuit arrangements for operating light-emitting diodes [LED]
    • H05B45/30—Driver circuits
    • H05B45/32—Pulse-control circuits
    • H05B45/325—Pulse-width modulation [PWM]
    • 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
    • H05B45/00—Circuit arrangements for operating light-emitting diodes [LED]
    • H05B45/30—Driver circuits
    • H05B45/34—Voltage stabilisation; Maintaining constant voltage
    • 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
    • H05B45/00—Circuit arrangements for operating light-emitting diodes [LED]
    • H05B45/30—Driver circuits
    • H05B45/345—Current stabilisation; Maintaining constant current
    • 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
    • H05B47/115—Controlling the light source in response to determined parameters by determining the presence or movement of objects or living beings

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  • Circuit Arrangement For Electric Light Sources In General (AREA)

Abstract

The invention discloses a luminosity adjustable LED lighting system based on physiological signals, which comprises: the physiological signal acquisition unit is connected with the input end of the main control unit; the output end of the main control unit is connected with the input end of the PWM controller; the output end of the PWM controller is connected with the brightness adjusting module; the output end of the brightness adjusting module is connected with the first adjusting module and the second adjusting module; the output end of the first adjusting module is connected with the first LED lamp group; the output end of the second adjusting module is connected with the second LED lamp group; the color temperature of the first LED lamp group is different from the color temperature of the second LED lamp group; the output end of the power supply unit is connected with the PWM controller, the first LED lamp group and the second LED lamp group; and the input end of the feedback unit is connected with the output end of the power supply unit and the output end of the brightness adjusting module. The color temperature of the LED light-emitting system is controlled by combining skin impedance and movement speed of a person, so that the color temperature of the LED light-emitting system can be changed along with the change of the state of the human body, and the effect of effectively regulating emotion of the person is achieved.

Description

Luminosity adjustable LED lighting system based on physiological signals
Technical Field
The invention relates to the technical field of LED (light-emitting diode) lighting, in particular to a luminosity adjustable LED lighting system based on physiological signals.
Background
The LED lamp has the characteristics of high power factor, high efficiency, energy saving, ultra-high brightness, environmental protection, high light efficiency, excellent constant power control performance and the like, so that the LED lamp is widely applied to the lighting lamp industry, is praised as a green lighting product, and has a trend of replacing the traditional lighting lamp. Intelligence has gradually been incorporated into LED luminaire designs as a personalized design. The LED lamp uses a large amount of embedded control software to replace part of hardware circuits, so that the LED lamp has more complete functions, improved performance, improved reliability, reduced volume and reduced cost. In addition, the cost of various color LEDs is greatly reduced, and the multi-color LED color mixing technology is a hot spot problem in current research. Visually and sensorially, the light transmits signals to the brain through eyes, and the color temperature of external lamplight is extremely high, so that psychological implications are given to the mind. However, in the prior art, the LED lighting system cannot meet the requirement that the color temperature changes along with the change of the human body state, and thus cannot realize the effect of adjusting the emotion of a person.
Disclosure of Invention
Based on this, there is a need to address the above-mentioned problems, and to propose a luminosity adjustable LED lighting system based on physiological signals.
A physiological signal based photometric adjustable LED lighting system comprising:
the physiological signal acquisition unit is worn on a human body, is in communication connection with the input end of the main control unit, and is used for acquiring skin impedance of the human body and the movement speed of the human body and transmitting the skin impedance and the movement speed to the main control unit;
the output end of the main control unit is connected with the input end of the PWM controller and is used for receiving the skin impedance and the movement speed, and when the skin impedance is larger than a preset skin impedance and the movement speed is not zero, a first control signal is output to the PWM controller; when the skin impedance is smaller than or equal to the preset skin impedance or the movement speed is zero, the main control unit stops outputting a first control signal to the PWM controller;
the output end of the PWM controller is connected with the input end of the brightness adjusting module and is used for receiving the first control signal and outputting a first PWM signal to the brightness adjusting module;
the output end of the brightness adjusting module is connected with the input ends of the first adjusting module and the second adjusting module, and is used for receiving the first PWM signal, outputting a first level signal to the first adjusting module and outputting a second level signal to the second adjusting module;
the output end of the first adjusting module is connected with a first LED lamp group and is used for receiving the first level signal and outputting a first driving signal to the first LED lamp group 70 so as to enable the first LED lamp group to be lighted;
the output end of the second adjusting module is connected with a second LED lamp group and is used for receiving the second level signal and outputting a second driving signal to the second LED lamp group 80 so as to turn off the second LED lamp group;
the color temperature of the first LED lamp group is different from the color temperature of the second LED lamp group;
the output end of the power supply unit is connected with the PWM controller, the first LED lamp group and the second LED lamp group and is used for supplying power to the PWM controller, the first LED lamp group and the second LED lamp group;
the input end of the feedback unit is connected with the output end of the power supply unit and the output end of the brightness adjusting module, and is used for acquiring the output voltage of the power supply unit and the working voltage of the brightness adjusting module and outputting the output voltage and the working voltage to the main control unit; the main control unit is also used for outputting a second control signal according to the output voltage and the working voltage, so that the PWM controller outputs a second PWM signal according to the second control signal, and the duty ratio of the second PWM signal is different from that of the first control signal.
In one embodiment, the physiological signal based photometric tunable LED lighting system further comprises:
the output end of the first temperature detection unit is connected with the input end of the main control unit and is used for acquiring the ambient temperature and outputting the ambient temperature to the main control unit; when the skin impedance is smaller than or equal to the preset skin impedance or the movement speed is zero, and the ambient temperature is smaller than a preset ambient temperature, the main control unit is further used for outputting the third control signal to the PWM controller;
the PWM controller is further used for outputting a third PWM signal to the brightness adjusting module according to the third control signal;
the brightness adjusting module is further used for outputting a third level signal to the first adjusting module according to the third PWM signal and outputting a fourth level signal to the second adjusting module;
the first adjusting module is further used for outputting a third driving signal to the first LED lamp group according to the third level signal so as to turn off the first LED lamp group; the second adjusting module is further configured to output a fourth driving signal to the second LED lamp set, so that the second LED lamp set is turned on.
In one embodiment, the physiological signal based photometric tunable LED lighting system further comprises:
the output end of the luminosity detection unit is connected with the input end of the main control unit and is used for acquiring illumination intensity and outputting the illumination intensity to the main control unit; when the skin impedance is smaller than or equal to the preset skin impedance or the movement speed is zero, and the illumination intensity is smaller than the preset illumination intensity, the main control unit is further used for outputting the fourth control signal to the PWM controller;
the PWM controller is further used for outputting a fourth PWM signal to the brightness adjusting module according to the fourth control signal;
the brightness adjusting module is further used for outputting a fifth level signal to the first adjusting module according to the fourth PWM signal and outputting a sixth level signal to the second adjusting module;
the first adjusting module is further used for outputting a fifth driving signal to the first LED lamp group according to the fifth level signal so as to turn off the first LED lamp group; the second adjusting module is further configured to output a sixth driving signal to the second LED lamp set, so that the second LED lamp set is turned on.
In one embodiment, the physiological signal based photometric tunable LED lighting system further comprises:
the output end of the second temperature detection unit is connected with the input end of the main control unit and is used for acquiring the first working temperature of the first LED lamp group and the second working temperature of the second LED lamp group; when the first working temperature is greater than a preset working temperature or the second working temperature is greater than the preset working temperature, the main control unit is further used for outputting the fifth control signal to the PWM controller;
the PWM controller is further used for outputting a fifth PWM signal to the brightness adjustment module according to the fifth control signal;
the brightness adjusting module is further used for outputting a seventh level signal to the first adjusting module according to the fifth PWM signal and outputting an eighth level signal to the second adjusting module;
the first adjusting module is further used for outputting a seventh driving signal to the first LED lamp group according to the seventh level signal so as to turn off the first LED lamp group; the second adjusting module is further used for outputting an eighth driving signal to the second LED lamp group so as to enable the second LED lamp group to be extinguished.
In one embodiment, the physiological signal based photometric tunable LED lighting system further comprises:
and the rectifying and filtering unit is connected between the power supply unit and the PWM controller and is used for filtering the voltage provided by the power supply unit to the PWM controller.
In one embodiment, the color temperature of the first set of LED lamps is lower than the color temperature of the second set of LED lamps.
In one embodiment, the physiological signal based photometric tunable LED lighting system further comprises:
the wireless communication module is connected between the physiological signal acquisition unit and the main control unit, and is used for receiving the skin impedance and the movement speed output by the physiological signal acquisition unit and outputting the skin impedance and the movement speed to the main control unit.
In one embodiment, the power supply unit is a constant voltage source; the feedback unit is a constant current source.
In one embodiment, the first temperature detection unit and the second temperature detection unit are both temperature sensors.
In one embodiment, the photometric detection unit is a photosensitive sensor.
The implementation of the embodiment of the invention has the following beneficial effects:
the skin impedance and the movement speed of the person are obtained through the physiological signal acquisition unit and are output to the main control unit, and when the skin impedance is larger than the preset skin impedance and the movement speed is not zero, the main control unit outputs a first control signal to the PWM controller; when the skin impedance is smaller than or equal to the preset skin impedance or the movement speed is zero, the main control unit stops outputting the first control signal to the PWM controller; the PWM controller receives the first control signal and outputs a first PWM signal to the brightness adjusting module; the brightness adjusting module receives the first PWM signal, outputs a first level signal to the first adjusting module and outputs a second level signal to the second adjusting module; the first adjusting module receives the first level signal and outputs a first driving signal to the first LED lamp group so as to enable the first LED lamp group to be lighted; the second adjusting module receives the second level signal and outputs a second driving signal to the second LED lamp group so as to turn off the second LED lamp group; the color temperature of the first LED lamp group is different from the color temperature of the second LED lamp group; the power supply unit supplies power to the PWM controller, the first LED lamp group and the second LED lamp group 80; the feedback unit acquires the output voltage of the power supply unit and the working voltage of the brightness adjusting module, and outputs the output voltage and the working voltage to the main control unit; the main control unit is also used for outputting a second control signal according to the output voltage and the working voltage so that the PWM controller outputs a second PWM signal according to the second control signal, and the duty ratio of the second PWM signal is different from that of the first control signal. The color temperature of the LED light-emitting system is controlled by combining skin impedance and movement speed of a person, so that the color temperature of the LED light-emitting system can be changed along with the change of the state of the human body, and the effect of effectively regulating emotion of the person is achieved.
Drawings
In order to more clearly illustrate the embodiments of the invention or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, it being obvious that the drawings in the following description are only some embodiments of the invention, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
Wherein:
FIG. 1 is a block diagram of a physiological signal based photometric tunable LED lighting system in one embodiment;
fig. 2 is a block diagram of a physiological signal based photometric tunable LED lighting system in another embodiment.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
The LED lamp has the characteristics of high power factor, high efficiency, energy saving, ultra-high brightness, environmental protection, high light efficiency, excellent constant power control performance and the like, so that the LED lamp is widely applied to the lighting lamp industry, is praised as a green lighting product, and has a trend of replacing the traditional lighting lamp. Intelligence has gradually been incorporated into LED luminaire designs as a personalized design. The LED lamp uses a large amount of embedded control software to replace part of hardware circuits, so that the LED lamp has more complete functions, improved performance, improved reliability, reduced volume and reduced cost. In addition, the cost of various color LEDs is greatly reduced, and the multi-color LED color mixing technology is a hot spot problem in current research. Visually and sensorially, the light transmits signals to the brain through eyes, and the color temperature of external lamplight is extremely high, so that psychological implications are given to the mind. However, in the prior art, the LED lighting system cannot meet the requirement that the color temperature changes along with the change of the human body state, and thus cannot realize the effect of adjusting the emotion of a person. In order to solve the above technical problem, the present application provides a luminosity adjustable LED lighting system based on physiological signals, as shown in fig. 1, including: the device comprises a physiological signal acquisition unit 10, a main control unit 20, a PWM controller 30, a brightness adjustment module 40, a first adjustment module 50, a second adjustment module 60, a first LED lamp group 70, a second LED lamp group 80, a power supply unit 90 and a feedback unit 100, wherein the physiological signal acquisition unit 10 is worn on a human body, is in communication connection with an input end of the main control unit 20, and is used for acquiring skin impedance of the human body and movement speed of the human body and transmitting the skin impedance and the movement speed to the main control unit 20; the output end of the main control unit 20 is connected to the input end of the PWM controller 30, and is configured to receive the skin impedance and the movement speed, and output a first control signal to the PWM controller 30 when the skin impedance is greater than a preset skin impedance and the movement speed is not zero; when the skin impedance is equal to or less than the preset skin impedance or the movement speed is zero, the main control unit 20 stops outputting a first control signal to the PWM controller 30; the output end of the PWM controller 30 is connected to the input end of the brightness adjustment module 40, and is configured to receive the first control signal and output a first PWM signal to the brightness adjustment module 40; the output end of the brightness adjusting module 40 is connected with the input ends of the first adjusting module 50 and the second adjusting module 60, and is used for receiving the first PWM signal, outputting a first level signal to the first adjusting module 50, and outputting a second level signal to the second adjusting module 60; the output end of the first adjusting module 50 is connected with the first LED lamp set 70, and is configured to receive the first level signal and output a first driving signal to the first LED lamp set 70, so that the first LED lamp set 70 is turned on; the output end of the second adjusting module 60 is connected with the second LED lamp set 80, and is configured to receive the second level signal and output a second driving signal to the second LED lamp set 80, so that the second LED lamp set 80 is turned off; the color temperature of the first LED lamp set 70 and the color temperature of the second LED lamp set 80 are different; the output end of the power supply unit 90 is connected with the PWM controller 30, the first LED lamp set 70 and the second LED lamp set 80, and is used for supplying power to the PWM controller 30, the first LED lamp set 70 and the second LED lamp set 80; the input end of the feedback unit 100 is connected to the output end of the power supply unit 90 and the output end of the brightness adjustment module 40, and is configured to obtain the output voltage of the power supply unit 90 and the working voltage of the brightness adjustment module 40, and output the output voltage and the working voltage to the main control unit 20; the main control unit 20 is further configured to output a second control signal according to the output voltage and the operating voltage, so that the PWM controller 30 outputs a second PWM signal according to the second control signal, where a duty ratio of the second PWM signal is different from a duty ratio of the first control signal. The skin impedance and the movement speed of the person are obtained through the physiological signal acquisition unit and are output to the main control unit, and when the skin impedance is larger than the preset skin impedance and the movement speed is not zero, the main control unit outputs a first control signal to the PWM controller; when the skin impedance is smaller than or equal to the preset skin impedance or the movement speed is zero, the main control unit stops outputting the first control signal to the PWM controller; the PWM controller receives the first control signal and outputs a first PWM signal to the brightness adjusting module; the brightness adjusting module receives the first PWM signal, outputs a first level signal to the first adjusting module and outputs a second level signal to the second adjusting module; the first adjusting module receives the first level signal and outputs a first driving signal to the first LED lamp group so as to enable the first LED lamp group to be lighted; the second adjusting module receives the second level signal and outputs a second driving signal to the second LED lamp group so as to turn off the second LED lamp group; the color temperature of the first LED lamp group is different from the color temperature of the second LED lamp group; the power supply unit supplies power to the PWM controller, the first LED lamp group and the second LED lamp group 80; the feedback unit acquires the output voltage of the power supply unit and the working voltage of the brightness adjusting module, and outputs the output voltage and the working voltage to the main control unit; the main control unit is also used for outputting a second control signal according to the output voltage and the working voltage so that the PWM controller outputs a second PWM signal according to the second control signal, and the duty ratio of the second PWM signal is different from that of the first control signal. The color temperature of the LED light-emitting system is controlled by combining skin impedance and movement speed of a person, so that the color temperature of the LED light-emitting system can be changed along with the change of the state of the human body, and the effect of effectively regulating emotion of the person is achieved.
In one embodiment, as shown in fig. 2, the luminosity adjustable LED lighting system based on physiological signals further includes: the output end of the first temperature detection unit 120 is connected with the input end of the main control unit 20, and is used for obtaining the ambient temperature and outputting the ambient temperature to the main control unit 20; when the skin impedance is less than or equal to the preset skin impedance or the movement speed is zero, and the ambient temperature is less than a preset ambient temperature, the main control unit 20 is further configured to output the third control signal to the PWM controller 30; the PWM controller 30 is further configured to output a third PWM signal to the brightness adjustment module 40 according to the third control signal; the brightness adjustment module 40 is further configured to output a third level signal to the first adjustment module 50 and a fourth level signal to the second adjustment module 60 according to the third PWM signal; the first adjusting module 50 is further configured to output a third driving signal to the first LED lamp set 70 according to the third level signal, so that the first LED lamp set 70 is turned off; the second adjusting module 60 is further configured to output a fourth driving signal to the second LED lamp set 80, so as to light the second LED lamp set.
In one embodiment, as shown in fig. 2, the luminosity adjustable LED lighting system based on physiological signals further includes: the output end of the luminosity detection unit 130 is connected with the input end of the main control unit 20, and is used for acquiring illumination intensity and outputting the illumination intensity to the main control unit 20; when the skin impedance is less than or equal to the preset skin impedance or the movement speed is zero, and the illumination intensity is less than a preset illumination intensity, the main control unit 20 is further configured to output the fourth control signal to the PWM controller 30; the PWM controller 30 is further configured to output a fourth PWM signal to the brightness adjustment module 40 according to the fourth control signal; the brightness adjustment module 40 is further configured to output a fifth level signal to the first adjustment module 50 and a sixth level signal to the second adjustment module 60 according to the fourth PWM signal; the first adjusting module 50 is further configured to output a fifth driving signal to the first LED lamp set 70 according to the fifth level signal, so that the first LED lamp set 70 is turned off; the second adjusting module 60 is further configured to output a sixth driving signal to the second LED lamp set 80 to light the second LED lamp set.
In one embodiment, as shown in fig. 2, the luminosity adjustable LED lighting system based on physiological signals further includes: a second temperature detection unit 140, wherein an output end of the second temperature detection unit 140 is connected to an input end of the main control unit 20, and is configured to obtain a first operating temperature of the first LED lamp set 70 and a second operating temperature of the second LED lamp set 80; when the first operating temperature is greater than a preset operating temperature or the second operating temperature is greater than a preset operating temperature, the main control unit 20 is further configured to output the fifth control signal to the PWM controller 30; the PWM controller 30 is further configured to output a fifth PWM signal to the brightness adjustment module 40 according to the fifth control signal; the brightness adjustment module 40 is further configured to output a seventh level signal to the first adjustment module 50 and output an eighth level signal to the second adjustment module 60 according to the fifth PWM signal; the first adjusting module 50 is further configured to output a seventh driving signal to the first LED lamp set 70 according to the seventh level signal, so that the first LED lamp set 70 is turned off; the second adjusting module 60 is further configured to output an eighth driving signal to the second LED lamp set 80 to turn off the second LED lamp set.
In one embodiment, as shown in fig. 2, the luminosity adjustable LED lighting system based on physiological signals further includes: and a rectifying and filtering unit 110, wherein the rectifying and filtering unit 110 is connected between the power supply unit 90 and the PWM controller 30, and is used for filtering the voltage provided by the power supply unit 90 to the PWM controller 30.
In one embodiment, the color temperature of the first set of LED lamps 70 is lower than the color temperature of the second set of LED lamps 80.
In one embodiment, as shown in fig. 2, the luminosity adjustable LED lighting system based on physiological signals further includes: the wireless communication module 150 is connected between the physiological signal acquisition unit 10 and the main control unit 20, and is configured to receive the skin impedance and the movement speed output by the physiological signal acquisition unit 10, and output the skin impedance and the movement speed to the main control unit 20.
In one embodiment, the power supply unit 90 is a constant voltage source; the feedback unit 100 is a constant current source.
In one embodiment, the first temperature detecting unit 120 and the second temperature detecting unit 140 are both temperature sensors.
In one embodiment, the photometric detection unit 130 is a photosensitive sensor.
The working principle of the application is as follows:
the physiological signal acquisition unit 10 may be an existing device capable of detecting skin impedance of a human body and movement speed of a person, preferably, the device may be worn on a wrist, the physiological signal acquisition unit 10 transmits the skin impedance and movement speed acquired in real time to the main control unit 20, the main control unit 20 receives the skin impedance and the movement speed, and when the skin impedance is greater than a preset skin impedance and the movement speed is not zero, a first control signal is output to the PWM controller 30; when the skin impedance is equal to or less than the preset skin impedance or the movement speed is zero, the main control unit 20 stops outputting a first control signal to the PWM controller 30; the PWM controller 30 receives the first control signal and outputs a first PWM signal to the brightness adjustment module 40; the brightness adjustment module 40 receives the first PWM signal, outputs a first level signal to the first adjustment module 50, and outputs a second level signal to the second adjustment module 60; the first adjustment module 50 outputs a first driving signal to the first LED lamp set 70 to light the first LED lamp set 70; the second adjusting module 60 outputs a second driving signal to the second LED lamp set 80 to turn off the second LED lamp set 80; the color temperature of the first LED lamp set 70 and the color temperature of the second LED lamp set 80 are different; the power supply unit 90 supplies power to the PWM controller 30, the first LED lamp set 70, and the second LED lamp set 80; the feedback unit 100 obtains the output voltage of the power supply unit 90 and the operating voltage of the brightness adjustment module 40, and outputs the output voltage and the operating voltage to the main control unit 20; the main control unit 20 is further configured to output a second control signal according to the output voltage and the operating voltage, so that the PWM controller 30 outputs a second PWM signal according to the second control signal, where a duty ratio of the second PWM signal is different from a duty ratio of the first control signal.
The method comprises the steps that skin impedance and movement speed of a person are obtained through a physiological signal collecting unit and are output to a main control unit, and when the skin impedance is larger than preset skin impedance and the movement speed is not zero, the main control unit outputs a first control signal to a PWM controller; when the skin impedance is smaller than or equal to the preset skin impedance or the movement speed is zero, the main control unit stops outputting the first control signal to the PWM controller; the PWM controller receives the first control signal and outputs a first PWM signal to the brightness adjusting module; the brightness adjusting module receives the first PWM signal, outputs a first level signal to the first adjusting module and outputs a second level signal to the second adjusting module; the first adjusting module receives the first level signal and outputs a first driving signal to the first LED lamp group so as to enable the first LED lamp group to be lighted; the second adjusting module receives the second level signal and outputs a second driving signal to the second LED lamp group so as to turn off the second LED lamp group; the color temperature of the first LED lamp group is different from the color temperature of the second LED lamp group; the power supply unit supplies power to the PWM controller, the first LED lamp group and the second LED lamp group 80; the feedback unit acquires the output voltage of the power supply unit and the working voltage of the brightness adjusting module, and outputs the output voltage and the working voltage to the main control unit; the main control unit is also used for outputting a second control signal according to the output voltage and the working voltage so that the PWM controller outputs a second PWM signal according to the second control signal, and the duty ratio of the second PWM signal is different from that of the first control signal. The color temperature of the LED light-emitting system is controlled by combining skin impedance and movement speed of a person, so that the color temperature of the LED light-emitting system can be changed along with the change of the state of the human body, and the effect of effectively regulating emotion of the person is achieved.
The foregoing disclosure is illustrative of the present invention and is not to be construed as limiting the scope of the invention, which is defined by the appended claims.

Claims (10)

1. A physiological signal based, luminosity adjustable LED lighting system comprising:
the physiological signal acquisition unit is worn on a human body, is in communication connection with the input end of the main control unit, and is used for acquiring skin impedance of the human body and the movement speed of the human body and transmitting the skin impedance and the movement speed to the main control unit;
the output end of the main control unit is connected with the input end of the PWM controller and is used for receiving the skin impedance and the movement speed, and when the skin impedance is larger than a preset skin impedance and the movement speed is not zero, a first control signal is output to the PWM controller; when the skin impedance is smaller than or equal to the preset skin impedance or the movement speed is zero, the main control unit stops outputting a first control signal to the PWM controller;
the output end of the PWM controller is connected with the input end of the brightness adjusting module and is used for receiving the first control signal and outputting a first PWM signal to the brightness adjusting module;
the output end of the brightness adjusting module is connected with the input end of the first adjusting module and the input end of the second adjusting module, and is used for receiving the first PWM signal, outputting a first level signal to the first adjusting module and outputting a second level signal to the second adjusting module;
the output end of the first adjusting module is connected with a first LED lamp group and is used for receiving the first level signal and outputting a first driving signal to the first LED lamp group 70 so as to enable the first LED lamp group to be lighted;
the output end of the second adjusting module is connected with a second LED lamp group and is used for receiving the second level signal and outputting a second driving signal to the second LED lamp group 80 so as to turn off the second LED lamp group;
the color temperature of the first LED lamp group is different from the color temperature of the second LED lamp group;
the output end of the power supply unit is connected with the PWM controller, the first LED lamp group and the second LED lamp group and is used for supplying power to the PWM controller, the first LED lamp group and the second LED lamp group;
the input end of the feedback unit is connected with the output end of the power supply unit and the output end of the brightness adjusting module, and is used for acquiring the output voltage of the power supply unit and the working voltage of the brightness adjusting module and outputting the output voltage and the working voltage to the main control unit; the main control unit is also used for outputting a second control signal according to the output voltage and the working voltage, so that the PWM controller outputs a second PWM signal according to the second control signal, and the duty ratio of the second PWM signal is different from that of the first control signal.
2. The physiological signal based photometric adjustable LED lighting system of claim 1, further comprising:
the output end of the first temperature detection unit is connected with the input end of the main control unit and is used for acquiring the ambient temperature and outputting the ambient temperature to the main control unit; when the skin impedance is smaller than or equal to the preset skin impedance or the movement speed is zero, and the ambient temperature is smaller than a preset ambient temperature, the main control unit is further used for outputting the third control signal to the PWM controller;
the PWM controller is further used for outputting a third PWM signal to the brightness adjusting module according to the third control signal;
the brightness adjusting module is further used for outputting a third level signal to the first adjusting module according to the third PWM signal and outputting a fourth level signal to the second adjusting module;
the first adjusting module is further used for outputting a third driving signal to the first LED lamp group according to the third level signal so as to turn off the first LED lamp group; the second adjusting module is further configured to output a fourth driving signal to the second LED lamp set, so that the second LED lamp set is turned on.
3. The physiological signal based photometric adjustable LED lighting system of claim 1, further comprising:
the output end of the luminosity detection unit is connected with the input end of the main control unit and is used for acquiring illumination intensity and outputting the illumination intensity to the main control unit; when the skin impedance is smaller than or equal to the preset skin impedance or the movement speed is zero, and the illumination intensity is smaller than the preset illumination intensity, the main control unit is further used for outputting the fourth control signal to the PWM controller;
the PWM controller is further used for outputting a fourth PWM signal to the brightness adjusting module according to the fourth control signal;
the brightness adjusting module is further used for outputting a fifth level signal to the first adjusting module according to the fourth PWM signal and outputting a sixth level signal to the second adjusting module;
the first adjusting module is further used for outputting a fifth driving signal to the first LED lamp group according to the fifth level signal so as to turn off the first LED lamp group; the second adjusting module is further configured to output a sixth driving signal to the second LED lamp set, so that the second LED lamp set is turned on.
4. The physiological signal based photometric adjustable LED lighting system of claim 2, further comprising:
the output end of the second temperature detection unit is connected with the input end of the main control unit and is used for acquiring the first working temperature of the first LED lamp group and the second working temperature of the second LED lamp group; when the first working temperature is greater than a preset working temperature or the second working temperature is greater than the preset working temperature, the main control unit is further used for outputting the fifth control signal to the PWM controller;
the PWM controller is further used for outputting a fifth PWM signal to the brightness adjustment module according to the fifth control signal;
the brightness adjusting module is further used for outputting a seventh level signal to the first adjusting module according to the fifth PWM signal and outputting an eighth level signal to the second adjusting module;
the first adjusting module is further used for outputting a seventh driving signal to the first LED lamp group according to the seventh level signal so as to turn off the first LED lamp group; the second adjusting module is further used for outputting an eighth driving signal to the second LED lamp group so as to enable the second LED lamp group to be extinguished.
5. The physiological signal based photometric adjustable LED lighting system of claim 1, further comprising:
and the rectifying and filtering unit is connected between the power supply unit and the PWM controller and is used for filtering the voltage provided by the power supply unit to the PWM controller.
6. The physiological signal based photometric adjustable LED lighting system of claim 1 wherein the color temperature of the first LED light set is lower than the color temperature of the second LED light set.
7. The physiological signal based photometric adjustable LED lighting system of claim 1, further comprising:
the wireless communication module is connected between the physiological signal acquisition unit and the main control unit, and is used for receiving the skin impedance and the movement speed output by the physiological signal acquisition unit and outputting the skin impedance and the movement speed to the main control unit.
8. The physiological signal based photometric adjustable LED lighting system of claim 1, wherein the power supply unit is a constant voltage source; the feedback unit is a constant current source.
9. The physiological signal based photometric adjustable LED lighting system of claim 4, wherein the first temperature detection unit and the second temperature detection unit are both temperature sensors.
10. The physiological signal based photometric adjustable LED lighting system of claim 3 wherein the photometric detection unit is a photosensitive sensor.
CN202311585037.0A 2023-11-24 2023-11-24 Luminosity adjustable LED lighting system based on physiological signals Pending CN117500115A (en)

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Application Number Priority Date Filing Date Title
CN202311585037.0A CN117500115A (en) 2023-11-24 2023-11-24 Luminosity adjustable LED lighting system based on physiological signals

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202311585037.0A CN117500115A (en) 2023-11-24 2023-11-24 Luminosity adjustable LED lighting system based on physiological signals

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CN117500115A true CN117500115A (en) 2024-02-02

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