CN213638292U - Little night-light of human response of can adjusting luminance - Google Patents
Little night-light of human response of can adjusting luminance Download PDFInfo
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- CN213638292U CN213638292U CN202022856011.3U CN202022856011U CN213638292U CN 213638292 U CN213638292 U CN 213638292U CN 202022856011 U CN202022856011 U CN 202022856011U CN 213638292 U CN213638292 U CN 213638292U
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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
Abstract
The utility model provides a little night-light of human response that can adjust luminance, include the shell and set up the circuit system in the shell. The circuit system comprises an LED component, a power circuit, an induction driving circuit and a dimming element. The power circuit is connected with mains supply and is used for supplying power to the LED assembly and the induction driving circuit simultaneously. The induction driving circuit is used for responding to an infrared signal radiated by a human body and outputting a driving signal for conducting an electric loop where the LED assembly is located. The dimming element is used for adjusting the duty ratio of the driving signal. Compare with the little night-light of current human infrared induction formula, the utility model discloses a little night-light of human response of can adjusting luminance has add the component of adjusting luminance, can realize the regulation to LED subassembly drive signal's duty cycle based on this component of adjusting luminance, and then realizes the function of adjusting luminance. According to the utility model discloses, can solve the problem that current little night-light of human infrared induction formula can't adjust luminance.
Description
Technical Field
The utility model belongs to the technical field of the lamps and lanterns illumination, more specifically relates to a little night-light of human response that can adjust luminance.
Background
In recent years, small night lamps are increasingly popular with consumers by virtue of the advantages of reasonable design, convenience in use, delicate appearance and the like, and become very common lighting equipment. The small night lamp not only can play a role in night illumination, but also can decorate the home environment well. The existing small night lamp can be divided into a button type, a remote control type, a pull wire type, a touch type, a voice control type, a light control type, a human body infrared induction type and the like according to the switch type, wherein along with the rise of the intelligent home, the human body infrared induction type small night lamp presents the trend of replacing other switch type small night lamps due to the intelligence.
However, the existing human body infrared induction type small night lamp only has the function of infrared induction luminescence, does not have the function of brightness adjustment, and cannot meet different requirements of users on illumination brightness.
SUMMERY OF THE UTILITY MODEL
The utility model aims to solve the problem that the little night-light of current human infrared induction formula can't adjust luminance.
In order to achieve the above object, the utility model provides a little night-light of human response that can adjust luminance.
The utility model discloses a little night-light of human response of can adjusting luminance includes the shell and sets up the circuit system in the shell, the circuit system includes LED subassembly, power supply circuit, response drive circuit and dimming component;
the power supply circuit is connected with commercial power and is used for simultaneously supplying power to the LED assembly and the induction driving circuit;
the induction driving circuit is used for responding to an infrared signal radiated by a human body and outputting a driving signal for conducting an electric loop where the LED assembly is located;
the dimming element is used for adjusting the duty ratio of the driving signal.
Preferably, the power supply circuit is a step-down rectifier circuit.
Preferably, the power supply circuit is a resistance-capacitance step-down full-wave rectifier circuit.
Preferably, the power circuit comprises a voltage dependent resistor, a current limiting resistor, a resistance-capacitance voltage reduction unit, a rectifier bridge, a filter capacitor and a voltage stabilizing diode;
a first alternating current input end of the rectifier bridge is connected with a live line of a mains supply and a first end of the piezoresistor through the resistance-capacitance voltage reduction unit;
a second alternating current input end of the rectifier bridge is connected with a second end of the piezoresistor and a first end of the current-limiting resistor at the same time, and a second end of the current-limiting resistor is connected with a commercial power zero line;
the positive direct current output end of the rectifier bridge is connected with the anode of the filter capacitor and the cathode of the voltage stabilizing diode at the same time, and the common end of the positive direct current output end of the rectifier bridge and the cathode of the voltage stabilizing diode is the positive output end of the power circuit;
and the negative direct current output end of the rectifier bridge is simultaneously connected with the negative electrode of the filter capacitor and the anode of the voltage stabilizing diode, and the common end of the negative direct current output end of the rectifier bridge and the anode of the voltage stabilizing diode is the negative output end of the power circuit.
Preferably, the sensing driving circuit includes a voltage dropping unit, an infrared sensing unit, a control unit and a switching element;
the voltage reduction unit is used for reducing the output voltage of the power circuit and supplying power to the infrared induction unit and the control unit;
the infrared sensing unit is used for responding to an infrared signal radiated by a human body and outputting a driving trigger signal;
the control unit is used for outputting the driving signal according to the driving trigger signal so as to lead the switching element to be periodically conducted in a preset working period;
the switch element is used for controlling the on-off of an electric loop where the LED assembly is located.
Preferably, the voltage reduction unit is implemented by a voltage reduction chip.
Preferably, the infrared sensing unit is implemented by a pyroelectric infrared sensor.
Preferably, the control unit is realized by a single chip microcomputer.
Preferably, the switching element is implemented by an NMOS transistor;
when the switch element is turned on, the output current of the power supply circuit sequentially flows into a power ground through the LED assembly and the NMOS tube;
and the grid electrode of the NMOS tube is connected with the driving signal output end of the control unit.
Preferably, the dimming element is configured to output a duty cycle adjustment signal in response to a pressure from the housing.
The beneficial effects of the utility model reside in that:
compare with the little night-light of current human infrared induction formula, the utility model discloses a little night-light of human response of can adjusting luminance has add the component of adjusting luminance, can realize the regulation to LED subassembly drive signal's duty cycle based on this component of adjusting luminance, and then realizes the function of adjusting luminance. Therefore, the utility model discloses a little night-light of human response of can adjusting luminance can solve the problem that current little night-light of human infrared induction formula can't adjust luminance effectively, can satisfy the different demands of user to illumination intensity.
Other features and advantages of the present invention will be described in detail in the detailed description which follows.
Drawings
The above and other objects, features and advantages of the present invention will become more apparent by describing in more detail exemplary embodiments thereof with reference to the attached drawings, in which like reference numerals generally represent like parts throughout the exemplary embodiments of the present invention.
Fig. 1 shows a schematic block diagram of a circuit system according to the present invention.
Fig. 2 shows a circuit schematic of a power supply circuit according to the invention.
Fig. 3 shows a control schematic of an inductive drive circuit according to the invention.
Detailed Description
Preferred embodiments of the present invention will be described in more detail below. While the following describes preferred embodiments of the present invention, it should be understood that the present invention may be embodied in various forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the invention to those skilled in the art.
Example (b): fig. 1 shows a schematic block diagram of the circuit system of the present embodiment. Referring to fig. 1, the dimmable human body induction night lamp of the present embodiment includes a housing and a circuit system disposed in the housing;
the circuit system comprises an LED component, a power circuit, an induction driving circuit and a dimming element;
the power circuit is connected with commercial power and is used for simultaneously supplying power to the LED assembly and the induction driving circuit;
the induction driving circuit is used for responding to an infrared signal radiated by a human body and outputting a driving signal for conducting an electric loop where the LED assembly is located;
the dimming element is used for adjusting the duty ratio of the driving signal.
In this embodiment, the power supply circuit is a step-down rectification circuit.
In this embodiment, the power circuit is a resistance-capacitance voltage reduction full-wave rectification circuit.
In this embodiment, the power circuit includes a voltage dependent resistor, a current limiting resistor, a resistance-capacitance voltage reduction unit, a rectifier bridge, a filter capacitor, and a voltage stabilizing diode;
a first alternating current input end of the rectifier bridge is connected with a live line of the mains supply and a first end of the piezoresistor through the resistance-capacitance voltage reduction unit;
a second alternating current input end of the rectifier bridge is connected with a second end of the piezoresistor and a first end of the current limiting resistor at the same time, and a second end of the current limiting resistor is connected with a commercial power zero line;
the positive direct current output end of the rectifier bridge is simultaneously connected with the anode of the filter capacitor and the cathode of the voltage stabilizing diode, and the common end of the three is the positive output end of the power circuit;
the negative direct current output end of the rectifier bridge is connected with the negative electrode of the filter capacitor and the anode of the voltage stabilizing diode, and the common end of the negative direct current output end of the rectifier bridge and the anode of the voltage stabilizing diode is the negative output end of the power circuit.
In this embodiment, the sensing driving circuit includes a voltage reduction unit, an infrared sensing unit, a control unit, and a switching element;
the voltage reduction unit is used for reducing the voltage of the output voltage of the power circuit and supplying power to the infrared induction unit and the control unit;
the infrared sensing unit is used for responding to an infrared signal radiated by a human body and outputting a driving trigger signal;
the control unit is used for outputting a driving signal according to the driving trigger signal so as to lead the switching element to be periodically conducted in a preset working period;
the switch element is used for controlling the on-off of an electric loop where the LED assembly is located.
In this embodiment, the voltage reduction unit is implemented by a voltage reduction chip.
In this embodiment, the control unit is implemented by a single chip microcomputer.
In this embodiment, the switching element is implemented by an NMOS transistor;
when the switch element is switched on, the output current of the power supply circuit flows into a power ground through the LED assembly and the NMOS tube in sequence;
and the grid electrode of the NMOS tube is connected with the driving signal output end of the control unit.
In this embodiment, the dimming element is configured to output a duty cycle adjustment signal in response to a pressure from the housing.
Fig. 2 shows a circuit schematic diagram of the power supply circuit of the present embodiment, and fig. 3 shows a control schematic diagram of the induction drive circuit of the present embodiment. The dimmable human body induction nightlight of the present embodiment is described in more detail below with reference to fig. 2 and 3:
a power supply circuit: in fig. 2, a resistor RV1 is a voltage dependent resistor, a resistor R1 is a current limiting resistor, a capacitor C1 and a resistor R2 constitute a resistance-capacitance voltage reduction unit, a rectifier bridge is implemented by using an MB10S rectifier chip, an electrolytic capacitor EC1 is a filter capacitor, and a diode ZD1 is a zener diode. In the power supply circuit, a live wire end AC-L and a zero line end AC-N are arranged in a plug, after the plug is connected with electricity, an input AC220V voltage signal is subjected to voltage reduction through a resistance-capacitance voltage reduction unit to be an AC20V voltage signal, and the AC20V voltage signal is converted into a DC18V voltage signal after being subjected to rectification of a rectifier bridge, filtering of a filter capacitor and voltage stabilization of a voltage stabilizing diode. The power supply circuit has the advantages of simple structure, low cost and easy realization.
Induction drive circuit and LED subassembly: the voltage reduction unit is realized by adopting an HT30 voltage stabilization chip, the infrared sensing unit is realized by adopting an AS312 pyroelectric infrared sensor, the control unit is realized by adopting a single chip microcomputer IC1, and the switching element is an NMOS transistor Q1. The LED assembly comprises 12 LEDs (6 strings 2 parallel). The DC18V voltage signal output by the power circuit powers the LED assembly and the inductive drive circuit. The input DC18V voltage signal is reduced to a DC5V voltage signal by the voltage reduction unit to supply power to the infrared induction unit and the control unit. The switching element controls the on and off of the LED component, and when the infrared sensing unit senses an infrared signal radiated by a human body, the OUT end of the infrared sensing unit outputs a high-level signal. In response to the high level signal, the PWM terminal of the control unit outputs a high level signal to turn on the switching element, and at this time, all of the 12 LEDs are turned on. The dimming element is realized by a switch K1 and is attached to a specified position on the inner side of the small night lamp shell. When a user presses the corresponding position of the shell of the small night lamp, the switch K1 is closed, the PWM end of the control unit outputs a PWM signal of 10Khz, the frequency of the PWM signal is kept unchanged, but the duty ratio is changed from 90% to 10%, so that the small night lamp enters a stepless dimming mode (automatically dimming from the highest brightness to the lowest brightness), and when the user finishes dimming, the user releases the hand to disconnect the switch K1.
While various embodiments of the present invention have been described above, the above description is intended to be illustrative, not exhaustive, and not limited to the disclosed embodiments. Many modifications and variations will be apparent to those of ordinary skill in the art without departing from the scope and spirit of the described embodiments.
Claims (10)
1. A dimmable human body induction small night lamp comprises a shell and a circuit system arranged in the shell, and is characterized in that the circuit system comprises an LED component, a power circuit, an induction driving circuit and a dimming element;
the power supply circuit is connected with commercial power and is used for simultaneously supplying power to the LED assembly and the induction driving circuit;
the induction driving circuit is used for responding to an infrared signal radiated by a human body and outputting a driving signal for conducting an electric loop where the LED assembly is located;
the dimming element is used for adjusting the duty ratio of the driving signal.
2. The human body induction nightlight of claim 1, wherein the power circuit is a buck rectifier circuit.
3. The human body induction nightlight of claim 2, wherein the power circuit is a resistance-capacitance step-down full-wave rectifier circuit.
4. The human body induction night light of claim 3, wherein the power circuit comprises a voltage dependent resistor, a current limiting resistor, a resistance-capacitance voltage reduction unit, a rectifier bridge, a filter capacitor and a voltage stabilizing diode;
a first alternating current input end of the rectifier bridge is connected with a live line of a mains supply and a first end of the piezoresistor through the resistance-capacitance voltage reduction unit;
a second alternating current input end of the rectifier bridge is connected with a second end of the piezoresistor and a first end of the current-limiting resistor at the same time, and a second end of the current-limiting resistor is connected with a commercial power zero line;
the positive direct current output end of the rectifier bridge is connected with the anode of the filter capacitor and the cathode of the voltage stabilizing diode at the same time, and the common end of the positive direct current output end of the rectifier bridge and the cathode of the voltage stabilizing diode is the positive output end of the power circuit;
and the negative direct current output end of the rectifier bridge is simultaneously connected with the negative electrode of the filter capacitor and the anode of the voltage stabilizing diode, and the common end of the negative direct current output end of the rectifier bridge and the anode of the voltage stabilizing diode is the negative output end of the power circuit.
5. The human body induction small night lamp of claim 1, wherein the induction driving circuit comprises a voltage reduction unit, an infrared induction unit, a control unit and a switch element;
the voltage reduction unit is used for reducing the output voltage of the power circuit and supplying power to the infrared induction unit and the control unit;
the infrared sensing unit is used for responding to an infrared signal radiated by a human body and outputting a driving trigger signal;
the control unit is used for outputting the driving signal according to the driving trigger signal so as to lead the switching element to be periodically conducted in a preset working period;
the switch element is used for controlling the on-off of an electric loop where the LED assembly is located.
6. The human body induction small night lamp according to claim 5, wherein the voltage reduction unit is implemented by a voltage reduction chip.
7. The human body induction small night lamp according to claim 5, wherein the infrared induction unit is implemented by a pyroelectric infrared sensor.
8. The human body induction night light of claim 5, wherein the control unit is implemented by a single chip microcomputer.
9. The human body induction nightlight of claim 5, wherein the switching element is implemented with an NMOS tube;
when the switch element is turned on, the output current of the power supply circuit sequentially flows into a power ground through the LED assembly and the NMOS tube;
and the grid electrode of the NMOS tube is connected with the driving signal output end of the control unit.
10. The personal induction nightlight of claim 1, wherein the dimming element is configured to output a duty cycle adjustment signal in response to pressure from the housing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022856011.3U CN213638292U (en) | 2020-12-01 | 2020-12-01 | Little night-light of human response of can adjusting luminance |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022856011.3U CN213638292U (en) | 2020-12-01 | 2020-12-01 | Little night-light of human response of can adjusting luminance |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN213638292U true CN213638292U (en) | 2021-07-06 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202022856011.3U Active CN213638292U (en) | 2020-12-01 | 2020-12-01 | Little night-light of human response of can adjusting luminance |
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| Country | Link |
|---|---|
| CN (1) | CN213638292U (en) |
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- 2020-12-01 CN CN202022856011.3U patent/CN213638292U/en active Active
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