CN107484291A - A kind of human body sensing night-light - Google Patents
A kind of human body sensing night-light Download PDFInfo
- Publication number
- CN107484291A CN107484291A CN201710646545.3A CN201710646545A CN107484291A CN 107484291 A CN107484291 A CN 107484291A CN 201710646545 A CN201710646545 A CN 201710646545A CN 107484291 A CN107484291 A CN 107484291A
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- China
- Prior art keywords
- human body
- light
- body sensing
- circuit
- sensing night
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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
- H05B45/00—Circuit arrangements for operating light-emitting diodes [LED]
- H05B45/30—Driver circuits
- H05B45/37—Converter circuits
-
- 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
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- Electronic Switches (AREA)
- Photometry And Measurement Of Optical Pulse Characteristics (AREA)
Abstract
The invention discloses a kind of human body sensing night-light, including：LED, power circuit, human body infrared inductive switch, the power circuit include reduction voltage circuit, the current rectifying and wave filtering circuit using non-isolated constant current chip WS9420 as core.The human body sensing night-light uses the reduction voltage circuit using non-isolated constant current chip WS9420 as core to provide electric energy instead of existing capacitance-resistance voltage reduction circuit for human body sensing night-light, so that the circuit system of human body sensing night-light is more stable, and non-isolated constant current chip WS9420 does not need electric capacity as decompression medium for the reduction voltage circuit of core, so that the life-span of human body sensing night-light is not limited by capacitor charge and discharge number, so as to extend the bulk life time of human body sensing night-light, the product quality of human body sensing night-light is improved.
Description
Technical field
The present invention relates to field of illumination lamp technology, more specifically to a kind of human body sensing night-light.
Background technology
At present, night-light is that a kind of light is soft, can play the household small electric appliance for guiding illuminating effect.Due to routine use
Electric light moment light of being turned on light at night it is too dazzling, discomfort easily is caused to human body (especially eye)；However, night-light light is soft
With, sheen like water, the illuminating effect of similar moonlight can be produced, therefore dim warm photoenvironment can be createed, is contributed to
Make people calmly, avoid causing sense of discomfort to human body.
Wherein, night-light can be divided into according to switchtype to divide:Push button, plug-in, distance type, stay-supported, it is touch,
Voice-control, light-operated and (human body infrared) induction type etc..Specifically, human body sensing night-light of the prior art generally includes：LED
Lamp, power circuit and human body infrared inductive switch；During practical set, power circuit, LED and human body infrared inductive switch are successively
Be electrically connected to form closed-loop path.It is main by research, above mentioned problem but the night-light universal life-span of present human body sensing is shorter
Concentrate on power circuit, because the power circuit of existing human body sensing night-light uses capacitance-resistance voltage reduction circuit mostly, due to resistance
It is resistance-capacitance depressurization electric capacity to hold the most important element of reduction voltage circuit, and human body is generally sensed yet with human body sensing night-light by opening
Open night-light, whole system is low when high during the electric current of whole system at work in ceaselessly on off state, whole so as to have influence on
In the life-span of individual capacitance-resistance voltage reduction circuit, eventually affect the bulk life time of whole night-light.
The content of the invention
It is an object of the invention to provide a kind of long lifespan and reliable human body sensing night-light.
The present invention solve its technical problem solution be：A kind of human body sensing night-light, including：LED, power supply electricity
Road, human body infrared inductive switch, the power circuit, LED and human body infrared inductive switch are sequentially connected electrically composition and closed back
Road, the power circuit are provided with：For carrying out the current rectifying and wave filtering circuit of rectifying and wave-filtering to civil power, for the electricity after rectifying and wave-filtering
The reduction voltage circuit being depressured is pressed, the reduction voltage circuit includes：Non-isolated constant current chip WS9420, Ultrafast recovery diode, limit
Leakage resistance, inductance, the consumption end of the non-isolated constant current chip is connected with the DC output end of the current rectifying and wave filtering circuit, described
The drive end of non-isolated constant current chip is connected with the negative pole of the Ultrafast recovery diode, one end of current-limiting resistance, described ultrafast
The positive pole of recovery diode connects over the ground, one end of the other end of the current-limiting resistance and the inductance, the non-isolated constant current
The earth terminal connection of chip, the other end of the inductance are connected with the LED.
Further, the human body infrared inductive switch, including：Pyroelectric infrared sensor, metal-oxide-semiconductor, the drive of the metal-oxide-semiconductor
LED described in moved end is connected, and the grid of the metal-oxide-semiconductor is connected with the output of the pyroelectric sensor, the pyroelectricity sensing
Device is used to sense human infrared signal and controls the metal-oxide-semiconductor to turn on.
Further, the current rectifying and wave filtering circuit includes：Rectifier bridge, pi type filter, the DC output end of the rectifier bridge with
The pi type filter connection.
Further, in addition to voltage stabilizing chip HT7533, the voltage stabilizing chip HT7533 for the rpyroelectric infrared for passing
Sensor provides electric energy.
Further, the LED is the LED lamp bead of 4 series connection.
The beneficial effects of the invention are as follows：The human body sensing night-light is used using non-isolated constant current chip WS9420 as core
Reduction voltage circuit provides electric energy instead of existing capacitance-resistance voltage reduction circuit for human body sensing night-light so that the circuit system of human body sensing night-light
System is more stable, and non-isolated constant current chip WS9420 does not need electric capacity to make as decompression medium for the reduction voltage circuit of core
The life-span for obtaining human body sensing night-light is not limited by capacitor charge and discharge number, so as to extend the bulk life time of human body sensing night-light,
Improve the product quality of human body sensing night-light.
Brief description of the drawings
Technical scheme in order to illustrate the embodiments of the present invention more clearly, make required in being described below to embodiment
Accompanying drawing is briefly described.Obviously, described accompanying drawing is the part of the embodiment of the present invention, rather than is all implemented
Example, those skilled in the art on the premise of not paying creative work, can also obtain other designs according to these accompanying drawings
Scheme and accompanying drawing.
Fig. 1 is the structural representation of human body sensing night-light；
Fig. 2 is the circuit connection diagram of the human body sensing night-light of embodiment 1.
Embodiment
Carried out below with reference to the design of embodiment and accompanying drawing to the present invention, concrete structure and caused technique effect clear
Chu, it is fully described by, to be completely understood by the purpose of the present invention, feature and effect.Obviously, described embodiment is this hair
Bright part of the embodiment, rather than whole embodiments, based on embodiments of the invention, those skilled in the art is not paying
The other embodiment obtained on the premise of creative work, belongs to the scope of protection of the invention.In addition, be previously mentioned in text
All annexations, not single finger element directly connect, and refer to can be according to specific implementation situation, by adding or reducing connection
Element, to form more excellent circuit structure.Each technical characteristic in the invention, on the premise of not conflicting conflict
Can be with combination of interactions.
Embodiment 1, with reference to figure 1 and Fig. 2, a kind of human body sensing night-light, including：LED 2, power circuit 1, human body infrared
Inductive switch 3, the power circuit 1, LED 2 and human body infrared inductive switch 3, which are sequentially connected electrically, forms closed-loop path, described
Power circuit 1 is provided with：For carrying out the current rectifying and wave filtering circuit 11 of rectifying and wave-filtering to civil power, for entering to the voltage after rectifying and wave-filtering
The reduction voltage circuit 12 of row decompression, the reduction voltage circuit 12 include：Non-isolated constant current chip WS9420, Ultrafast recovery diode
ES1J, current-limiting resistance RS1, inductance L2, the current rectifying and wave filtering circuit 11 include：Rectifier bridge BD1, pi type filter, the π types filter
Ripple device is made up of the first inductance L1, first resistor R1, the first electric capacity CE1, the second electric capacity CE2, the first resistor R1 with it is described
First inductance L1 is in parallel, the positive pole of the first electric capacity CE1 and the first inductance L1 one end, the rectifier bridge BD1 it is straight
Output end connection is flowed, the negative pole of the first electric capacity CE1 is connected to ground, the positive pole of the second electric capacity CE2 and the described first electricity
Feel the consumption end Drain connections of the L1 other end, the non-isolated constant current chip WS9420, the negative pole of the second electric capacity CE2
It is connected to ground.The earth terminal of the non-isolated constant current chip WS9420 and one end of the current-limiting resistance RS1, the inductance L2
One end connects, the drive end CS and the Ultrafast recovery diode ES1J of the non-isolated constant current chip WS9420 negative pole, limit
Leakage resistance RS1 other end connection, the positive pole of the Ultrafast recovery diode ES1J connect over the ground, the other end of the inductance L2
It is connected with the LED 2, the LED 2 is that LED lamp bead LED1, LED2, LED3, LED4 are in series, the inductance L2's
The other end is connected with the positive pole of the lamp bead LED1.
The human body infrared inductive switch 3 includes：Pyroelectric infrared sensor AM612, metal-oxide-semiconductor Q1, the metal-oxide-semiconductor Q1's
The negative pole connection of lamp bead LED4 described in drive end, the output end of the grid of the metal-oxide-semiconductor Q1 and the pyroelectric sensor AM612
REL connections, when pyroelectric sensor AM612 senses human infrared signal, output end REL output high level, so as to metal-oxide-semiconductor
Q1 is turned on, and LED 2 is lighted.
Input VIN and inductance L2 as optimization, in addition to voltage stabilizing chip HT7533, the voltage stabilizing chip HT7533 connect
Connect, the output end vo ut of the voltage stabilizing chip HT7533 is connected with the feeder ear of the pyroelectric infrared sensor AM612, described
Voltage stabilizing chip HT7533 provides 3.3V voltage for pyroelectric infrared sensor AM612, is stood alone as using voltage stabilizing chip HT7533
Pyroelectric infrared sensor AM612 powers, and pyroelectric infrared sensor AM612 and reduction voltage circuit 12 is separated, so as to avoid
Harmonic effects of the pyroelectric infrared sensor AM612 by reduction voltage circuit 12 so that pyroelectric infrared sensor AM612 works
It is more stable.
The reduction voltage circuit 12 used using non-isolated constant current chip WS9420 as core of the human body sensing night-light replaces existing
Capacitance-resistance voltage reduction circuit provide electric energy for whole human body sensing night-light so that the circuit system of whole human body sensing night-light is more steady
It is fixed, and non-isolated constant current chip WS9420 does not need electric capacity as decompression medium for the reduction voltage circuit 12 of core so that human body
The life-span of sensing night-light is not limited by capacitor charge and discharge number, so as to extend the bulk life time of human body sensing night-light, is improved
The product quality of human body sensing night-light.
The better embodiment of the present invention is illustrated above, but the invention is not limited to the implementation
Example, those skilled in the art can also make a variety of equivalent modifications on the premise of without prejudice to spirit of the invention or replace
Change, these equivalent modifications or replacement are all contained in the application claim limited range.
Claims (5)
1. a kind of human body sensing night-light, including：LED, power circuit, human body infrared inductive switch, the power circuit, LED
Lamp and human body infrared inductive switch, which are sequentially connected electrically, forms closed-loop path, it is characterised in that the power circuit is provided with：For right
Civil power carries out current rectifying and wave filtering circuit, the reduction voltage circuit for being depressured to the voltage after rectifying and wave-filtering of rectifying and wave-filtering, described
Reduction voltage circuit includes：Non-isolated constant current chip WS9420, Ultrafast recovery diode, current-limiting resistance, inductance, the non-isolated constant current
The consumption end of chip is connected with the DC output end of the current rectifying and wave filtering circuit, the drive end of the non-isolated constant current chip and institute
One end connection of the negative pole, current-limiting resistance of Ultrafast recovery diode is stated, the positive pole of the Ultrafast recovery diode connects over the ground, institute
State the other end of current-limiting resistance and one end of the inductance, the earth terminal of the non-isolated constant current chip are connected, the inductance
The other end is connected with the LED.
A kind of 2. human body sensing night-light according to claim 1, it is characterised in that：The human body infrared inductive switch, bag
Include：Pyroelectric infrared sensor, metal-oxide-semiconductor, LED described in the drive end of the metal-oxide-semiconductor are connected, the grid of the metal-oxide-semiconductor and institute
The output connection of pyroelectric sensor is stated, the pyroelectric sensor is used to sense human infrared signal and controls the metal-oxide-semiconductor
Conducting.
A kind of 3. human body sensing night-light according to claim 1, it is characterised in that：The current rectifying and wave filtering circuit includes：It is whole
Bridge, pi type filter are flowed, the DC output end of the rectifier bridge is connected with the pi type filter.
A kind of 4. human body sensing night-light according to claim 2, it is characterised in that：Also include voltage stabilizing chip HT7533, institute
Voltage stabilizing chip HT7533 is stated to be used to provide electric energy for the pyroelectric infrared sensor.
A kind of 5. human body sensing night-light according to claim 1, it is characterised in that：The LED is the LED of 4 series connection
Lamp bead.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710646545.3A CN107484291A (en) | 2017-08-01 | 2017-08-01 | A kind of human body sensing night-light |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710646545.3A CN107484291A (en) | 2017-08-01 | 2017-08-01 | A kind of human body sensing night-light |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN107484291A true CN107484291A (en) | 2017-12-15 |
Family
ID=60597133
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710646545.3A Pending CN107484291A (en) | 2017-08-01 | 2017-08-01 | A kind of human body sensing night-light |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108575028A (en) * | 2018-04-24 | 2018-09-25 | 厦门恩耐照明技术有限公司 | The infrared induction control circuit and control method powered using main winding tap in non-isolated circuit |
Citations (4)
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| CN202374523U (en) * | 2011-12-15 | 2012-08-08 | 宁波升谱光电半导体有限公司 | Light emitting diode (LED) human body induction lamp |
| CN103220862A (en) * | 2013-04-18 | 2013-07-24 | 涂小兵 | Control circuit and control method for achieving multiple lighting functions of human body induction LED lamp |
| CN204100026U (en) * | 2014-08-27 | 2015-01-14 | 上虞市天悦电器有限公司 | A kind of automatic body induction LED night-light |
| CN205584567U (en) * | 2016-04-28 | 2016-09-14 | 宜昌星鑫电子股份有限公司 | Hot energy release intelligence LED lamp circuit |
-
2017
- 2017-08-01 CN CN201710646545.3A patent/CN107484291A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202374523U (en) * | 2011-12-15 | 2012-08-08 | 宁波升谱光电半导体有限公司 | Light emitting diode (LED) human body induction lamp |
| CN103220862A (en) * | 2013-04-18 | 2013-07-24 | 涂小兵 | Control circuit and control method for achieving multiple lighting functions of human body induction LED lamp |
| CN204100026U (en) * | 2014-08-27 | 2015-01-14 | 上虞市天悦电器有限公司 | A kind of automatic body induction LED night-light |
| CN205584567U (en) * | 2016-04-28 | 2016-09-14 | 宜昌星鑫电子股份有限公司 | Hot energy release intelligence LED lamp circuit |
Non-Patent Citations (3)
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| 李响初: "《实用电子控制线路200例》", 31 March 2009, 中国电力出版社 * |
| 精品包装&智慧理财: "简化***的降压型 LED 驱动-WS9420", 《豆丁网》 * |
| 陈有卿: "《TWH8751/8778功率开关集成电路原理与应用》", 31 January 2009, 中国电力出版社 * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108575028A (en) * | 2018-04-24 | 2018-09-25 | 厦门恩耐照明技术有限公司 | The infrared induction control circuit and control method powered using main winding tap in non-isolated circuit |
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Application publication date: 20171215 |
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| RJ01 | Rejection of invention patent application after publication |