CN110113842B - Ambient light induction control lamp switch circuit - Google Patents
Ambient light induction control lamp switch circuit Download PDFInfo
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- CN110113842B CN110113842B CN201910425336.5A CN201910425336A CN110113842B CN 110113842 B CN110113842 B CN 110113842B CN 201910425336 A CN201910425336 A CN 201910425336A CN 110113842 B CN110113842 B CN 110113842B
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- 230000006698 induction Effects 0.000 title abstract description 4
- 239000003990 capacitor Substances 0.000 claims description 55
- 230000000087 stabilizing effect Effects 0.000 claims description 13
- 239000003381 stabilizer Substances 0.000 claims description 10
- 230000009467 reduction Effects 0.000 claims description 4
- 230000008859 change Effects 0.000 abstract description 7
- 230000000875 corresponding effect Effects 0.000 abstract description 3
- 230000004048 modification Effects 0.000 description 3
- 238000012986 modification Methods 0.000 description 3
- 239000000523 sample Substances 0.000 description 3
- 241001465382 Physalis alkekengi Species 0.000 description 2
- 238000001914 filtration Methods 0.000 description 2
- 230000000007 visual effect Effects 0.000 description 2
- 238000001514 detection method Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000004134 energy conservation Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
Classifications
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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]
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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
- H05B47/11—Controlling the light source in response to determined parameters by determining the brightness or colour temperature of ambient light
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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
- Y02B20/30—Semiconductor lamps, e.g. solid state lamps [SSL] light emitting diodes [LED] or organic LED [OLED]
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- Circuit Arrangement For Electric Light Sources In General (AREA)
Abstract
The invention aims to provide an ambient light induction control lamp switching circuit, which controls the PA36 pin of a singlechip U2 to output PWM waveforms through the internal program of the singlechip U2 to drive a MOS tube Q1 on a lamp output loop to be rapidly switched on and switched off, so that intermittent output of lamp light is realized, and the lamp light is distinguished from external stable ambient light. The singlechip U2 detects the change of external light through the external photodiode D5, if the light is intermittent, the light emitted by the lamp is indicated, the singlechip U2 does not act, if the light is continuous, the change of external environment light is indicated, and the singlechip U2 executes corresponding actions according to a set program.
Description
Technical Field
The invention relates to an ambient light induction control lamp switching circuit.
Background
With the popularization of intelligence, unattended lighting devices have been increasingly used in daily life work. The lamp is automatically switched on and off according to the change of the environment, so that the purposes of energy conservation and environmental protection are achieved. However, due to the limitation of the lamp structure, the photosensitive sensing probe and the LED have to be placed in the same cavity, and thus there is a problem in that the photosensitive sensing probe cannot effectively distinguish the ambient light from the light emitted from the LED.
Disclosure of Invention
An object of the present invention is to provide an ambient light sensing control lamp switching circuit.
According to one aspect of the present invention, there is provided an ambient light sensing control lamp switching circuit, the circuit comprising:
the device comprises a safety resistor F1 and a rectifier bridge D1, wherein an L line of mains supply is connected with one end of the safety resistor F1, the other end of the safety resistor F1 is connected with one input end of the rectifier bridge D1, and an N line of the mains supply is connected with the other input end of the rectifier bridge D1;
the power supply comprises a resistor R2, a resistor R3, a power supply chip U1 and a capacitor C4, wherein the positive output end of the rectifier bridge D1 is connected with one end of the resistor R2, the other end of the resistor R2 is connected with one end of the resistor R3, the other end of the resistor R3 is connected to a 4-pin VCC of the power supply chip U1 and one end of the capacitor C4, and the other end of the capacitor C4 is connected to the negative end of the rectifier bridge D1 and an 8-pin GND of the power supply chip U1;
the diode D2, the electrolytic capacitor C1, the resistor R1, the inductor T1, the MOS tube Q1, the capacitor C2 and the resistor R8, wherein the positive output end of the rectifier bridge D1 is respectively connected with the negative electrode of the diode D2, the positive electrode of the electrolytic capacitor C1 and one end of the resistor R1 to be used as the positive output end of the power supply, and the positive output of the connected power supply is connected with the positive electrode of the load LED; the anode of the diode D2 is connected with one end of the inductor T1 and the 5 pins and the 6 pins of the power chip U1; the other end of the inductor T1 is respectively connected with the negative electrode of the electrolytic capacitor C1, the other end of the resistor R1 and the source electrode of the MOS tube Q1; the drain electrode of the MOS tube Q1 is used as a negative electrode output end of a power supply and is connected with the negative electrode of the load LED; one end of the capacitor C2 is connected with the source electrode of the MOS tube Q1, and the other end of the capacitor C2 is connected to the ground GND; the 3 pin of the power chip U1 is connected with one end of the resistor R8, and the other end of the resistor R8 is connected with the ground GND;
the three-terminal voltage regulator comprises a resistor R4, a triode Q3, a resistor R7, a singlechip U2, a voltage regulator tube D4, a diode D3 and a three-terminal voltage regulator chip Q2, wherein one end of the resistor R4 is connected to the positive output end of a rectifier bridge D1, the other end of the resistor R4 is connected to the collector of the triode Q3 and one end of the resistor R7, and the other end of the resistor R7 is connected to an 8-pin GND of the singlechip U2; the base electrode of the triode Q3 is connected to the negative electrode of the voltage stabilizing tube D4, and the positive electrode of the voltage stabilizing tube D4 is connected to the 8-pin GND of the singlechip U2; the emitter of the triode Q3 is connected to the positive electrode of a diode D3, the positive electrode of the diode D3 is connected to one end of a capacitor C3 and the 3 pin of the input end of the three-terminal voltage regulator chip Q2, and the other end of the capacitor C3 is connected to the 8 pin GND of the singlechip U2; the 1-pin GND of the three-terminal voltage regulator chip Q2 is connected to the 8-pin GND of the singlechip U2; the output end 2 pin of the three-terminal voltage stabilizer chip Q2 is connected to one end of a capacitor C5 and the 1 pin VDD of the singlechip U2, and the 8 pin GND of the singlechip U2 is connected to the cathode of the electrolytic capacitor C1;
the LED display device comprises a resistor R5, a resistor R6 and a photodiode D5, wherein a pin 1 of the singlechip U2 is connected with VDD to one end of the resistor R5, the other end of the resistor R5 is connected with a pin 7 PA4 of the singlechip U2 and the anode of the photodiode D5, and the cathode of the photodiode D5 is connected with a pin 8 GND of the singlechip U2; the 6-pin PA3 of the singlechip U2 is connected to one end of the resistor R6, and the other end of the resistor R6 is connected to the grid electrode of the MOS tube Q1.
In the above circuit, the direct current output from the rectifier bridge D1 is subjected to current limiting and voltage reduction through the resistor R2 and the resistor R3 to generate low-voltage direct current, and then filtered through the capacitor C4 to generate pure low-voltage direct current to supply power to the power chip U1.
Further, in the above circuit, the 5 pins and the 6 pins of the power chip U1 are the same, the 5 pins and the 6 pins of the power chip U1 are used together as one end of the first switch, the 3 pins of the power chip are used as the other end of the first switch, the two ends of the first switch are rapidly switched inside the power chip U1, so that the rectified direct current intermittently passes through the load LED and the inductor T1, and the power chip U1 adjusts the output PWM waveform by detecting the voltage of the resistor R8.
Further, in the above circuit, the electrolytic capacitor C1 filters intermittent direct current into pure direct current for the load LED to work, the resistor R1 is a dummy load, and when the load LED is open, the voltage on the electrolytic capacitor C1 is discharged to avoid danger; the capacitor C2 is configured to isolate a peak voltage between two ends of the first switch when the power chip U1 is rapidly turned on and off, so as to protect a device from being damaged.
Further, in the above circuit, the resistors R4 and R7 supply the high voltage dc after the rectifier bridge D1 to the triode Q3 after voltage reduction, the triode Q3 generates a stable dc voltage through the voltage stabilizing effect of the voltage stabilizing tube D4, and generates a stable dc voltage output at the output terminal 2 pin of the three-terminal voltage stabilizer chip Q2 through the voltage input of the 3 pin input terminal of the three-terminal voltage stabilizer chip Q2, and then supplies the stable dc voltage output to the single chip microcomputer U2 after filtering by the capacitor C5.
Further, in the above circuit, when the light intensity of the external environment is sensed by the photodiode D5, the photodiode D5 is turned on, the voltage of the 7-pin PA4 of the single-chip microcomputer U2 is pulled down, the voltage of the 6-pin PA3 of the single-chip microcomputer U2 is lowered, the MOS transistor Q1 is turned off, and the load LED is turned off;
when the photodiode D5 senses that the external environment light is weakened, the 6-pin PA3 of the singlechip U2 controls and outputs PWM waveforms, so that the MOS tube Q1 is intermittently conducted, and the load LED is intermittently lighted.
Furthermore, in the above circuit, the period of the PWM waveform output by the 6-pin PA3 of the single chip microcomputer U2 is 10mS.
Compared with the prior art, the power supply device has the advantages that the MOS tube Q1 on the lamp output loop is driven to be rapidly switched on and off by the PA36 pin output PWM waveform of the singlechip U2 through the internal program of the singlechip U2, and intermittent output of lamp light is realized, so that the power supply device is distinguished from external stable environment light.
In addition, the singlechip U2 detects the change of external light through the external photodiode D5, if the light is intermittent, the light emitted by the lamp is indicated, the singlechip U2 does not act, if the light is continuous, the change of external environment light is indicated, and the singlechip U2 executes corresponding action according to a set program.
Drawings
Other features, objects and advantages of the present invention will become more apparent upon reading of the detailed description of non-limiting embodiments, made with reference to the accompanying drawings in which:
fig. 1 shows a circuit diagram of an ambient light sensing control lamp switch according to an embodiment of the invention.
The same or similar reference numbers in the drawings refer to the same or similar parts.
Detailed Description
The invention is described in further detail below with reference to the accompanying drawings.
As shown in fig. 1, the present invention provides an ambient light sensing control lamp switching circuit, comprising:
the device comprises a safety resistor F1 and a rectifier bridge D1, wherein an L line of mains supply is connected with one end of the safety resistor F1, the other end of the safety resistor F1 is connected with one input end of the rectifier bridge D1, and an N line of the mains supply is connected with the other input end of the rectifier bridge D1;
the safety resistor F1 plays a protective role in this case, preventing the risk of short-circuit, and the ac power is converted into dc power by the rectifier bridge D1.
The power supply comprises a resistor R2, a resistor R3, a power supply chip U1 and a capacitor C4, wherein the positive output end of the rectifier bridge D1 is connected with one end of the resistor R2, the other end of the resistor R2 is connected with one end of the resistor R3, the other end of the resistor R3 is connected to a 4-pin VCC of the power supply chip U1 and one end of the capacitor C4, and the other end of the capacitor C4 is connected to the negative end of the rectifier bridge D1 and an 8-pin GND of the power supply chip U1;
preferably, the direct current output from the rectifier bridge D1 is subjected to current limiting and voltage reduction through the resistor R2 and the resistor R3 to generate low-voltage direct current, and then filtered through the capacitor C4 to generate purer low-voltage direct current to supply power to the power chip U1, so that the power chip U1 is maintained to work normally;
the power supply chip U1 can be a chip with the model number of SD6702S manufactured by Shillama corporation;
the diode D2, the electrolytic capacitor C1, the resistor R1, the inductor T1, the MOS tube Q1, the capacitor C2 and the resistor R8, wherein the positive output end of the rectifier bridge D1 is respectively connected with the negative electrode of the diode D2, the positive electrode of the electrolytic capacitor C1 and one end of the resistor R1 to be used as the positive output end of the power supply, and the positive output of the connected power supply is connected with the positive electrode of the load LED; the anode of the diode D2 is connected with one end of the inductor T1 and the 5 pins and the 6 pins of the power chip U1; the other end of the inductor T1 is respectively connected with the negative electrode of the electrolytic capacitor C1, the other end of the resistor R1 and the source electrode of the MOS tube Q1; the drain electrode of the MOS tube Q1 is used as a negative electrode output end of a power supply and is connected with the negative electrode of the load LED; one end of the capacitor C2 is connected with the source electrode of the MOS tube Q1, and the other end of the capacitor C2 is connected to the ground GND; the 3 pin of the power chip U1 is connected with one end of the resistor R8, and the other end of the resistor R8 is connected with the ground GND;
preferably, the pins 5 and 6 of the power chip U1 are the same, the pins 5 and 6 of the power chip U1 are used together as one end of a first switch, the pin 3 of the power chip is used as the other end of the first switch, and the two ends of the first switch are rapidly switched inside the power chip U1, so that the rectified direct current intermittently passes through the load LED and the inductor T1, and the power chip U1 judges whether the PWM waveform of the switch needs to be adjusted by detecting the voltage of the resistor R8, so as to achieve the purpose of constant current output; the diode D2 plays a role of follow current, the electrolytic capacitor C1 filters intermittent direct current into purer direct current for the load LED to work, the resistor R1 is a dummy load, and when the load LED is open circuit, the voltage on the electrolytic capacitor C1 can be quickly discharged so as to avoid danger; the capacitor C2 can effectively isolate peak voltage between two ends of the first switch when the power chip U1 is rapidly switched on and off so as to prevent devices from being damaged;
the three-terminal voltage regulator comprises a resistor R4, a triode Q3, a resistor R7, a singlechip U2, a voltage regulator tube D4, a diode D3 and a three-terminal voltage regulator chip Q2, wherein one end of the resistor R4 is connected to the positive output end of a rectifier bridge D1, the other end of the resistor R4 is connected to the collector of the triode Q3 and one end of the resistor R7, and the other end of the resistor R7 is connected to an 8-pin GND of the singlechip U2; the base electrode of the triode Q3 is connected to the negative electrode of the voltage stabilizing tube D4, and the positive electrode of the voltage stabilizing tube D4 is connected to the 8-pin GND of the singlechip U2; the emitter of the triode Q3 is connected to the positive electrode of a diode D3, the positive electrode of the diode D3 is connected to one end of a capacitor C3 and the 3 pin of the input end of the three-terminal voltage regulator chip Q2, and the other end of the capacitor C3 is connected to the 8 pin GND of the singlechip U2; the 1-pin GND of the three-terminal voltage regulator chip Q2 is connected to the 8-pin GND of the singlechip U2; the output end 2 pin of the three-terminal voltage stabilizer chip Q2 is connected to one end of a capacitor C5 and the 1 pin VDD of the singlechip U2, and the 8 pin GND of the singlechip U2 is connected to the cathode of the electrolytic capacitor C1;
preferably, the resistors R4 and R7 supply high-voltage direct current after the rectifier bridge D1, the high-voltage direct current is reduced and then supplied to the triode Q3, the triode Q3 generates relatively stable direct current voltage through the voltage stabilizing effect of the voltage stabilizing tube D4, the diode D3 prevents current backflow, the capacitor C3 plays a role in filtering and voltage stabilizing, the chip Q2 is a three-terminal voltage stabilizer, the voltage input through the 3-pin input end of the three-terminal voltage stabilizer chip Q2 can generate very stable direct current voltage output at the 2-pin output end of the three-terminal voltage stabilizer chip Q2, and the very stable direct current voltage output is supplied to the singlechip U2 after being filtered by the capacitor C5.
The singlechip U2 can be a singlechip with model XY152 of Shenzhen Shengmei Co.
The LED display device comprises a resistor R5, a resistor R6 and a photodiode D5, wherein a pin 1 VDD of the singlechip U2 is connected to one end of the resistor R5, the other end of the resistor R5 is connected to a pin 7 PA4 of the singlechip U2 and the anode of the photodiode D5, and the cathode of the photodiode D5 is connected to a pin 8 GND of the singlechip U2; the 6-pin PA3 of the singlechip U2 is connected to one end of the resistor R6, and the other end of the resistor R6 is connected to the grid electrode of the MOS tube Q1;
preferably, after the light intensity of the external environment is sensed by the photodiode D5, the photodiode D5 is turned on, the voltage of the 7-pin PA4 of the singlechip U2 is pulled down, the voltage of the 6-pin PA3 of the singlechip U2 is controlled to be low through the internal program of the singlechip U2, the MOS tube Q1 is turned off, and the load LED is turned off;
when the light-sensitive diode D5 senses that the external environment light is weakened, the PA36 pin of the singlechip U2 is controlled by the internal program of the singlechip U2 to output PWM waveforms, so that the MOS tube Q1 is intermittently turned on, the load LED is intermittently turned on, and the human eyes cannot sense that the load LED is intermittently turned on due to the visual stop effect of the human eyes and the control of the turn-on frequency is good. Therefore, the environment light is distinguished from the light emitted by the LED, and the singlechip can distinguish the open-loop environment light from the light emitted by the LED. Avoiding interference and erroneous judgment.
Here, this application is through the quick break-make of the MOS pipe Q1 on the PA36 foot output PWM waveform drive lamps and lanterns output circuit of singlechip U2 internal program control singlechip U2, realizes the intermittent output of lamps and lanterns light to distinguish with external stable environment light.
In addition, the singlechip U2 detects the change of external light through the external photodiode D5, if the light is intermittent, the light emitted by the lamp is indicated, the singlechip U2 does not act, if the light is continuous, the change of external environment light is indicated, and the singlechip U2 executes corresponding action according to a set program.
In order to make the human eyes not feel that the light of the lamp is intermittently output, the period of the PWM waveform can be controlled within 100mS, because the visual residence time of the human eyes is about 0.1S, the period of the PWM waveform is generally set to be about 10mS in order to ensure that the human eyes cannot feel the interruption of the light. The time is not too short, and the detection accuracy of the singlechip is reduced.
In a specific embodiment, the application provides a house number plate lamp provided with the ambient light sensing control lamp switching circuit, which can sense the brightness of ambient light and automatically switch on or off. When the environment is bright, the lamp is automatically turned off and is in a standby state, and when the environment is dark, the lamp is automatically turned on and is lighted to start working. Because the photosensitive probe is arranged in the lamp, the lamp has better integral sense and more beautiful appearance, and can conveniently realize higher IP grade.
It will be apparent to those skilled in the art that various modifications and variations can be made in the present application without departing from the spirit or scope of the application. Thus, if such modifications and variations of the present application fall within the scope of the claims and the equivalents thereof, the present application is intended to cover such modifications and variations.
It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential characteristics thereof. The present embodiments are, therefore, to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned. Furthermore, it is evident that the word "comprising" does not exclude other elements or steps, and that the singular does not exclude a plurality. A plurality of units or means recited in the apparatus claims can also be implemented by means of one unit or means in software or hardware. The terms first, second, etc. are used to denote a name, but not any particular order.
Claims (5)
1. An ambient light sensing control lamp switching circuit, wherein the circuit comprises:
the device comprises a safety resistor F1 and a rectifier bridge D1, wherein an L line of mains supply is connected with one end of the safety resistor F1, the other end of the safety resistor F1 is connected with one input end of the rectifier bridge D1, and an N line of the mains supply is connected with the other input end of the rectifier bridge D1;
the power supply comprises a resistor R2, a resistor R3, a power supply chip U1 and a capacitor C4, wherein the positive output end of the rectifier bridge D1 is connected with one end of the resistor R2, the other end of the resistor R2 is connected with one end of the resistor R3, the other end of the resistor R3 is connected to a 4-pin VCC of the power supply chip U1 and one end of the capacitor C4, and the other end of the capacitor C4 is connected to the negative end of the rectifier bridge D1 and an 8-pin GND of the power supply chip U1;
the diode D2, the electrolytic capacitor C1, the resistor R1, the inductor T1, the MOS tube Q1, the capacitor C2 and the resistor R8, wherein the positive output end of the rectifier bridge D1 is respectively connected with the negative electrode of the diode D2, the positive electrode of the electrolytic capacitor C1 and one end of the resistor R1 to be used as the positive output end of the power supply, and the positive output of the connected power supply is connected with the positive electrode of the load LED; the anode of the diode D2 is connected with one end of the inductor T1 and the 5 pins and the 6 pins of the power chip U1; the other end of the inductor T1 is respectively connected with the negative electrode of the electrolytic capacitor C1, the other end of the resistor R1 and the source electrode of the MOS tube Q1; the drain electrode of the MOS tube Q1 is used as a negative electrode output end of a power supply and is connected with the negative electrode of the load LED; one end of the capacitor C2 is connected with the source electrode of the MOS tube Q1, and the other end of the capacitor C2 is connected to the ground GND; the 3 pin of the power chip U1 is connected with one end of the resistor R8, and the other end of the resistor R8 is connected with the ground GND;
the three-terminal voltage regulator comprises a resistor R4, a triode Q3, a resistor R7, a singlechip U2, a voltage regulator tube D4, a diode D3 and a three-terminal voltage regulator chip Q2, wherein one end of the resistor R4 is connected to the positive output end of a rectifier bridge D1, the other end of the resistor R4 is connected to the collector of the triode Q3 and one end of the resistor R7, and the other end of the resistor R7 is connected to an 8-pin GND of the singlechip U2; the base electrode of the triode Q3 is connected to the negative electrode of the voltage stabilizing tube D4, and the positive electrode of the voltage stabilizing tube D4 is connected to the 8-pin GND of the singlechip U2; the emitter of the triode Q3 is connected to the positive electrode of a diode D3, the positive electrode of the diode D3 is connected to one end of a capacitor C3 and the 3 pin of the input end of the three-terminal voltage regulator chip Q2, and the other end of the capacitor C3 is connected to the 8 pin GND of the singlechip U2; the 1-pin GND of the three-terminal voltage regulator chip Q2 is connected to the 8-pin GND of the singlechip U2; the output end 2 pin of the three-terminal voltage stabilizer chip Q2 is connected to one end of a capacitor C5 and the 1 pin VDD of the singlechip U2, and the 8 pin GND of the singlechip U2 is connected to the cathode of the electrolytic capacitor C1;
the LED display device comprises a resistor R5, a resistor R6 and a photodiode D5, wherein a pin 1 of the singlechip U2 is connected with VDD to one end of the resistor R5, the other end of the resistor R5 is connected with a pin 7 PA4 of the singlechip U2 and the anode of the photodiode D5, and the cathode of the photodiode D5 is connected with a pin 8 GND of the singlechip U2; the 6-pin PA3 of the singlechip U2 is connected to one end of the resistor R6, and the other end of the resistor R6 is connected to the grid electrode of the MOS tube Q1;
the power chip U1 is characterized in that the 5 pins and the 6 pins of the power chip U1 are the same, the 5 pins and the 6 pins of the power chip U1 are used as one end of a first switch together, the 3 pins of the power chip are used as the other end of the first switch, the two ends of the first switch are rapidly switched inside the power chip U1, so that the rectified direct current intermittently passes through a load LED and an inductor T1, and the power chip U1 adjusts the output PWM waveform by detecting the voltage of a resistor R8;
when the light intensity of the external environment is sensed by the photodiode D5, the photodiode D5 is turned on, the voltage of the 7-pin PA4 of the singlechip U2 is pulled down, the voltage of the 6-pin PA3 of the singlechip U2 is lowered, the MOS tube Q1 is turned off, and the load LED is turned off;
when the photodiode D5 senses that the external environment light is weakened, the 6-pin PA3 of the singlechip U2 controls and outputs PWM waveforms, so that the MOS tube Q1 is intermittently conducted, and the load LED is intermittently lighted.
2. The circuit of claim 1, wherein the direct current output from the rectifier bridge D1 is reduced in voltage by the resistor R2 and the resistor R3 to generate low-voltage direct current, and then filtered by the capacitor C4 to generate pure low-voltage direct current to supply power to the power chip U1.
3. The circuit of claim 1, wherein the electrolytic capacitor C1 filters intermittent dc power into pure dc power for the load LED to operate, the resistor R1 is a dummy load, and the voltage on the electrolytic capacitor C1 is discharged when the load LED is open so as not to generate danger; the capacitor C2 is configured to isolate a peak voltage between two ends of the first switch when the power chip U1 is rapidly turned on and off, so as to protect a device from being damaged.
4. The circuit of claim 1, wherein the resistors R4 and R7 supply the high voltage dc after the rectifier bridge D1 to the triode Q3 after voltage reduction, the triode Q3 generates a stable dc voltage through the voltage stabilizing effect of the voltage stabilizing tube D4, and generates a stable dc voltage output through the voltage input of the 3 pin input end of the three-terminal voltage stabilizer chip Q2 at the 2 pin of the output end of the three-terminal voltage stabilizer chip Q2, and then the stable dc voltage is supplied to the single chip microcomputer U2 after being filtered by the capacitor C5.
5. The circuit of claim 4, wherein the period of the PWM waveform output by the 6-pin PA3 of the single-chip microcomputer U2 is 10mS.
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| CN201910425336.5A CN110113842B (en) | 2019-05-21 | 2019-05-21 | Ambient light induction control lamp switch circuit |
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| CN201910425336.5A CN110113842B (en) | 2019-05-21 | 2019-05-21 | Ambient light induction control lamp switch circuit |
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| CN110113842B true CN110113842B (en) | 2024-03-05 |
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Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103415116A (en) * | 2013-08-15 | 2013-11-27 | 京东方科技集团股份有限公司 | Dimming circuit and dimmable lighting device |
| CN103857101A (en) * | 2012-11-29 | 2014-06-11 | 深圳市海洋王照明工程有限公司 | Drive circuit and lamp fixture |
| WO2015180136A1 (en) * | 2014-05-30 | 2015-12-03 | 王晓元 | Dimming switch and dimming method therefor |
| DE202016101998U1 (en) * | 2016-04-15 | 2016-05-02 | Zhejiang Twinsel Electronic Technology Co., Ltd. | Control circuit of a switch dimming LED light |
| DE202016000354U1 (en) * | 2016-01-20 | 2016-05-20 | Zhejiang Sungiant Arts&Crafts Co., Ltd | A wireless controller of the LED Christmas fairy lights and a corresponding LED fairy lights |
| CN105792416A (en) * | 2016-03-16 | 2016-07-20 | 浙江双宇电子科技有限公司 | Control circuit of switch light-dimming type LED lamp |
| CN106793330A (en) * | 2017-01-09 | 2017-05-31 | 江苏宜美照明科技股份有限公司 | Dim the circuit of color-temperature regulating |
| CN206865798U (en) * | 2017-06-30 | 2018-01-09 | 深圳亿思腾达集成股份有限公司 | A kind of LED linear constant-current circuit of automatic sensing ambient light |
| CN108093525A (en) * | 2017-12-28 | 2018-05-29 | 宁波丽安电子有限公司 | A kind of LED power circuit and control method with inductive power supply |
| CN210609805U (en) * | 2019-05-21 | 2020-05-22 | 江苏宜美照明科技股份有限公司 | Ambient light sensing control lamp switch circuit |
-
2019
- 2019-05-21 CN CN201910425336.5A patent/CN110113842B/en active Active
Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103857101A (en) * | 2012-11-29 | 2014-06-11 | 深圳市海洋王照明工程有限公司 | Drive circuit and lamp fixture |
| CN103415116A (en) * | 2013-08-15 | 2013-11-27 | 京东方科技集团股份有限公司 | Dimming circuit and dimmable lighting device |
| WO2015180136A1 (en) * | 2014-05-30 | 2015-12-03 | 王晓元 | Dimming switch and dimming method therefor |
| DE202016000354U1 (en) * | 2016-01-20 | 2016-05-20 | Zhejiang Sungiant Arts&Crafts Co., Ltd | A wireless controller of the LED Christmas fairy lights and a corresponding LED fairy lights |
| CN105792416A (en) * | 2016-03-16 | 2016-07-20 | 浙江双宇电子科技有限公司 | Control circuit of switch light-dimming type LED lamp |
| DE202016101998U1 (en) * | 2016-04-15 | 2016-05-02 | Zhejiang Twinsel Electronic Technology Co., Ltd. | Control circuit of a switch dimming LED light |
| CN106793330A (en) * | 2017-01-09 | 2017-05-31 | 江苏宜美照明科技股份有限公司 | Dim the circuit of color-temperature regulating |
| CN206865798U (en) * | 2017-06-30 | 2018-01-09 | 深圳亿思腾达集成股份有限公司 | A kind of LED linear constant-current circuit of automatic sensing ambient light |
| CN108093525A (en) * | 2017-12-28 | 2018-05-29 | 宁波丽安电子有限公司 | A kind of LED power circuit and control method with inductive power supply |
| CN210609805U (en) * | 2019-05-21 | 2020-05-22 | 江苏宜美照明科技股份有限公司 | Ambient light sensing control lamp switch circuit |
Non-Patent Citations (1)
| Title |
|---|
| LED灯调光系统设计;王丽霞;柴海莉;王久和;;信息记录材料(第02期);全文 * |
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| CN110113842A (en) | 2019-08-09 |
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