CN110248441B - Intelligent light-operated linear LED lamp circuit - Google Patents
Intelligent light-operated linear LED lamp circuit Download PDFInfo
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- CN110248441B CN110248441B CN201910426667.0A CN201910426667A CN110248441B CN 110248441 B CN110248441 B CN 110248441B CN 201910426667 A CN201910426667 A CN 201910426667A CN 110248441 B CN110248441 B CN 110248441B
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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]
- H05B45/10—Controlling the intensity of the 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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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B20/00—Energy efficient lighting technologies, e.g. halogen lamps or gas discharge lamps
- Y02B20/40—Control techniques providing energy savings, e.g. smart controller or presence detection
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Abstract
The invention discloses an intelligent light-operated linear LED lamp circuit, which comprises a rectifying circuit, a light-sensing circuit, an intelligent control circuit, a voltage stabilizing circuit, a multi-section constant current circuit, a first LED light-emitting circuit, a second LED light-emitting circuit and a third LED light-emitting circuit, wherein a voltage threshold is arranged in the intelligent control circuit; the method has the advantages that the cost is low, and on the basis of realizing two automatic control functions of turning on and turning off the lamp, the brightness can be automatically adjusted according to the preset time stage by using the ambient light intensity as a reference time point.
Description
Technical Field
The invention relates to a linear LED lamp circuit, in particular to an intelligent light-operated linear LED lamp circuit.
Background
The LED lamp has the advantages of energy conservation and environmental protection, and is widely used in various occasions. LED lamps are mainly divided into two main categories: the linear LED lamp and the switching power supply type LED lamp which adopts the switching power supply as the driving power supply have higher performance-price ratio compared with the switching power supply type LED lamp, and are the most widely used LED lamps at present.
With the deep popularization of intelligent lighting concepts and environmental protection and energy conservation, linear LED lamps are developing towards the direction of intellectualization and energy conservation. The light-operated linear LED lamp is automatically turned on or off by sensing ambient light, and is applied to many occasions. The light-operated linear LED lamp comprises a structural member connected with commercial power and a light-operated linear LED lamp circuit arranged in the structural member. The structural block diagram of the existing light-operated linear LED lamp circuit is shown in figure 1, and the light-operated linear LED lamp circuit comprises a rectifying and filtering circuit, a voltage conversion circuit, a light induction circuit, an intelligent control circuit, a linear constant current circuit and an LED light-emitting circuit; the rectification filter circuit is provided with a live wire input end, a zero line input end, an output end and a grounding end, the voltage conversion circuit is provided with an input end, an output end and a grounding end, the photoinduction circuit is provided with a positive electrode, an output end and a grounding end, the intelligent control circuit is provided with a power supply positive electrode, a grounding end, a signal input end and a control end, the linear constant current circuit is provided with a power supply end, an output end, a control end and a grounding end, when the control end of the linear constant current circuit is connected with a high level, the output end of the linear constant current circuit is conducted to the grounding end of the linear constant current circuit by constant current, when the voltage of the control end of the linear constant current circuit is a low level, the output end of the. The input end of the live wire of the rectification filter circuit is connected with the live wire of commercial power, the input end of the zero line is connected with the live wire of the commercial power, the output end of the rectification filter circuit, the anode of the LED light-emitting circuit, the input end of the voltage conversion circuit is connected with the power end of the linear constant current circuit, the output end of the voltage conversion circuit, the anode of the photoinduction circuit is connected with the power anode of the intelligent control circuit, the output end of the photoinduction circuit is connected with the signal input end of the intelligent control circuit, the control end of the intelligent control circuit is connected with the control end of the linear constant current circuit, the output end of the linear constant current circuit is connected with the cathode of the LED light-emitting circuit, the grounding end of the rectification filter circuit. When the rectification filter circuit is connected with mains supply alternating current, the rectification filter circuit rectifies and filters the mains supply alternating current and then outputs high-voltage direct current at the output end of the rectification filter circuit, the voltage conversion circuit converts the high-voltage direct current output by the rectification filter circuit into low-voltage direct current and then provides working voltage for the light induction circuit and the intelligent control circuit, the intelligent control circuit periodically outputs a low-level signal at the control end of the intelligent control circuit, the voltage value of the output end of the light induction circuit is read when the low level is generated, the output end of the linear constant-current circuit is at the cut-off moment, namely the LED light-emitting circuit has the non-light-emitting moment, and the actual condition that the output voltage of the light induction.
The intelligent control circuit is internally provided with a threshold voltage, the light sensing circuit senses the intensity of ambient light in real time, the intelligent control circuit reads the voltage of an output end of the light sensing circuit which senses the ambient light at the moment that the LED light-emitting circuit does not emit light, if the light sensing circuit senses that the ambient light is bright, the intelligent control circuit outputs a monitoring voltage signal lower than the threshold voltage to the intelligent control circuit at the output end of the light sensing circuit, the intelligent control circuit receives the monitoring voltage signal and then compares the monitoring voltage signal with the threshold voltage to obtain a conclusion that the monitoring voltage signal is lower than the threshold voltage, the control end of the light sensing circuit outputs a low level, so that the output end of the linear constant current circuit is cut off relative to the grounding end, no current flows through the output end of the linear; if the light sensing circuit senses that the ambient light ratio is darker, a monitoring voltage signal higher than the threshold voltage is output to the intelligent control circuit at the output end of the light sensing circuit, the intelligent control circuit receives the monitoring voltage signal and then compares the monitoring voltage signal with the threshold voltage to obtain the conclusion that the monitoring voltage signal is higher than the threshold voltage, a PWM control signal with high and low level periodic transformation is output at the control end of the intelligent control circuit, the output end of the linear constant current circuit is conducted relative to the grounding end at the high level moment, the high-voltage direct-current voltage output by the rectifying and filtering circuit passes through the linear constant current circuit at the moment, and the output end of the linear constant current circuit outputs constant working current to supply power for the LED light-emitting circuit so as to enable the LED light-.
The light-operated linear LED lamp circuit adopts the voltage conversion circuit to supply power for the light sensing circuit and the intelligent control circuit, the cost is high, the light-operated linear LED lamp circuit can only realize two controls of turning on and turning off the lamp according to the intensity of ambient illumination, the brightness can not be adjusted according to the requirements of different time periods, the intelligent requirements of the current LED lamp are more and more, and the light-operated linear LED lamp circuit can not meet the current requirements more and more.
Disclosure of Invention
The invention aims to solve the technical problem of providing a light-control linear LED lamp circuit which is low in cost and can automatically adjust the brightness according to a preset time stage by using the ambient light intensity as a reference time point on the basis of realizing two automatic control functions of turning on and turning off the lamp.
The technical scheme adopted by the invention for solving the technical problems is as follows: an intelligent light-operated linear LED lamp circuit comprises a rectifying circuit, a light-sensing circuit, an intelligent control circuit and a first LED light-emitting circuit, wherein the rectifying circuit converts commercial power alternating current into pulsating direct current voltage for output, the light-sensing circuit converts an external light signal into a direct current voltage signal for output, the direct current voltage signal output by the light-sensing circuit becomes larger along with the reduction of the intensity of the light signal, the intelligent light-operated linear LED lamp circuit further comprises a voltage stabilizing circuit, a multi-section constant current circuit, a second LED light-emitting circuit and a third LED light-emitting circuit, the first LED light-emitting circuit, the second LED light-emitting circuit and the third LED light-emitting circuit are sequentially connected in series, and the first LED light-emitting circuit is connected into the direct current voltage output by the rectifying circuit; the on-state voltage of the first LED light-emitting circuit is recorded as V1, the on-state voltage of the second LED light-emitting circuit is recorded as V2, the on-state voltage of the third LED light-emitting circuit is recorded as V3, and the voltage value of the pulsating direct-current voltage output by the rectifying circuit at a certain moment is recorded as Vt; the intelligent control circuit and the multi-section constant current circuit respectively have two working modes: the intelligent control circuit is internally provided with a voltage threshold, when the intelligent control circuit is in the sleep mode, the intelligent control circuit outputs a low level to control the multi-section constant current circuit to enter the sleep mode, the first LED light-emitting circuit, the second LED light-emitting circuit and the third LED light-emitting circuit do not emit light, and at the moment, the low voltage generated by the multi-section constant current circuit is subjected to voltage stabilization processing by the voltage stabilizing circuit and then provides power for the light-sensing circuit and the intelligent control circuit; when the intelligent control circuit is in a sleep mode, the intelligent control circuit reads a direct current voltage signal output by the light induction circuit in real time, when the direct current voltage signal output by the light induction circuit is greater than or equal to the voltage threshold value, the intelligent control circuit is awakened and enters a normal working mode, and at the moment, the intelligent control circuit generates a PWM control signal and outputs the PWM control signal to the multi-section constant current circuit to control the multi-section constant current circuit to enter the normal working mode; when the intelligent control circuit and the multi-section constant current circuit are in a normal working mode, when the PWM control signal is at a high level moment: if Vt < V1, none of the first LED lighting circuit, the second LED lighting circuit, and the third LED lighting circuit is illuminated; if V1 is not more than Vt < V1+ V2, the multi-section constant current circuit controls the first LED light-emitting circuit to emit light and controls the second LED light-emitting circuit and the third LED light-emitting circuit not to emit light; if V1+ V2 is not more than Vt < V1+ V2+ V3, the multi-section constant current circuit controls the first LED light-emitting circuit and the second LED light-emitting circuit to be in a series connection state, the first LED light-emitting circuit and the second LED light-emitting circuit flow currents with the same magnitude and emit light simultaneously, and the third LED light-emitting circuit is controlled not to emit light; if Vt is larger than or equal to V1+ V2+ V3, the multi-section constant current circuit controls the first LED light-emitting circuit, the second LED light-emitting circuit and the third LED light-emitting circuit to be in a serial connection state, and currents with the same magnitude flow through the first LED light-emitting circuit, the second LED light-emitting circuit and the third LED light-emitting circuit to emit light simultaneously; when the PWM control signal is at a low level moment, the multi-section constant current circuit controls the first LED light-emitting circuit, the second LED light-emitting circuit and the third LED light-emitting circuit not to emit light; when the intelligent control circuit is in a normal working mode, the pulsating direct-current voltage output by the rectifying circuit is subjected to voltage stabilization processing by the voltage stabilizing circuit and then provides a power supply for the light sensing circuit and the intelligent control circuit; when the intelligent control circuit is in a normal working mode, the intelligent control circuit acquires a signal whether the first LED light-emitting circuit is conducted to emit light in real time, when the first LED light-emitting circuit is conducted to emit light, the intelligent control circuit acquires a high level, when the first LED light-emitting circuit is not conducted to emit light, the intelligent control circuit acquires a low level, the intelligent control circuit reads a direct current voltage signal output by the photoinduction circuit when the first LED light-emitting circuit is not conducted, namely when the pulsating direct current voltage output by the rectifying circuit is at a low moment and any LED light-emitting circuit cannot emit light, and at the moment, if the direct current voltage signal output by the photoinduction circuit is greater than or equal to the voltage threshold value, the intelligent control circuit keeps the current normal working mode unchanged, if the direct current voltage signal output by the light sensing circuit is smaller than the voltage threshold, the intelligent control circuit finishes the current normal working mode and enters the sleep mode again; the intelligent control circuit starts timing after entering a normal working mode, and can output PWM control signals with different duty ratios in different time periods to adjust the brightness of the LED lamp circuit in the normal working mode according to requirements preset by a user.
The intelligent control circuit comprises an anode, a first input end, a second input end, an output end and a grounding end, the live wire input end of the rectification circuit is connected with the zero line of the commercial power, the output end of the rectification circuit is connected with the anode of the first LED light-emitting circuit, the output end of the rectification circuit, the grounding end of the rectification circuit, the light-sensing circuit is provided with a live wire input end, a zero line input end, an output end and a grounding end, the light-sensing circuit is provided with an anode, an output end and a grounding end, the first LED light-emitting circuit, the second LED light-emitting circuit and the third LED light-emitting circuit are respectively provided with an anode and a cathode, the multi-section constant current circuit is provided with a first output end, a second output end, a third output end, a high-voltage power end, a low-voltage power end, a control end and a grounding end, the live wire input, The high-voltage power supply end of the multi-section constant current circuit is connected with the first input end of the voltage stabilizing circuit, the cathode of the first LED light-emitting circuit, the anode of the second LED light-emitting circuit, the first input end of the intelligent control circuit are connected with the first output end of the multi-section constant current circuit, the cathode of the second LED light-emitting circuit, the anode of the third LED light-emitting circuit are connected with the second output end of the multi-section constant current circuit, the cathode of the third LED light-emitting circuit is connected with the third output end of the multi-section constant current circuit, the low-voltage power supply end of the multi-section constant current circuit is connected with the second input end of the voltage stabilizing circuit, the output end of the voltage stabilizing circuit, the anode of the light-sensing circuit are connected with the anode of the intelligent control circuit, and the output end of the light-sensing circuit is connected with the second input end of the intelligent control circuit, the output end of the intelligent control circuit is connected with the control ends of the multi-section constant current circuits, and the grounding end of the rectifying circuit, the grounding end of the voltage stabilizing circuit, the grounding end of the light sensing circuit and the grounding end of the intelligent control circuit are connected with the grounding ends of the multi-section constant current circuits.
The voltage stabilizing circuit comprises a first capacitor, a second capacitor, a third capacitor, a first diode, a second diode and a first chip, wherein the first chip is an LDO linear voltage stabilizing chip, the first chip is provided with an input pin, an output pin and a grounding pin, the second capacitor is an electrolytic capacitor, the first diode is a voltage stabilizing diode, one end of the first capacitor is a first input end of the voltage stabilizing circuit, the other end of the first capacitor, the cathode of the first diode and the anode of the second diode are connected, the cathode of the second diode, the anode of the second capacitor and the input pin of the first chip are connected, the connecting end of the second diode is a second input end of the voltage stabilizing circuit, the output pin of the first chip and one end of the third capacitor are connected, and the connecting end of the first diode and the third capacitor is an output end of the voltage stabilizing circuit, the other end of the third capacitor, the grounding pin of the first chip, the cathode of the second capacitor and the anode of the first diode are connected, and the connecting end of the third capacitor is the grounding end of the voltage stabilizing circuit. In the circuit, one end of a first capacitor is used as a first input end of a voltage stabilizing circuit, a resistance-capacitance voltage reduction circuit principle is utilized, high-efficiency voltage conversion efficiency is achieved, a second input end is arranged in the voltage stabilizing circuit, input voltage of the second input end is provided by a low-voltage power supply end of linear constant current, the requirements of different sizes of power supply current in the sleep mode and the normal working mode of the intelligent control circuit are met, power consumption is reduced, the circuit is simple, and cost is low.
The light sensing circuit comprises a first resistor and a phototriode, one end of the first resistor is an input end of the light sensing circuit, the other end of the first resistor is connected with a collector of the phototriode, a connecting end of the first resistor is an output end of the light sensing circuit, and an emitter of the phototriode is a grounding end of the light sensing circuit.
The intelligent control circuit comprises a second chip, a second resistor, a third resistor, a fourth resistor and a fourth capacitor, the model of the second chip is AI100, a pin 1 of the second chip is the anode of the intelligent control circuit, a pin 5 of the second chip and one end of the fourth resistor are connected and the connecting end of the pin is the second input end of the intelligent control circuit, the other end of the fourth resistor and a pin 3 of the second chip are connected, a pin 4 of the second chip is the output end of the intelligent control circuit, one end of the second resistor is the first input end of the intelligent control circuit, the other end of the second resistor, one end of the third resistor, one end of the fourth capacitor and a pin 6 of the second chip are connected, the other end of the third resistor, the other end of the fourth capacitor and a pin 8 of the second chip are connected and the connecting end of the pin 8 of the second chip is the intelligent control circuit Ground terminal of the circuit. In the circuit, when the intelligent control circuit is in a sleep mode, a pin 4 of a second chip is kept at a low level to control the multi-section constant current circuit to sleep, a pin 3 of the second chip is at a low level to enable a fourth resistor and a phototriode to be in a parallel connection state, a pin 5 of the second chip is in an interrupt input state, a pin 5 of the second chip collects a direct current voltage signal output by the light sensing circuit, when the direct current voltage signal output by the light sensing circuit is greater than or equal to a voltage threshold value set in the second chip, the second chip exits the sleep mode and enters a normal working mode, the pin 5 of the second chip firstly exits from the interrupt input state and enters a general input state, then the pin 4 of the second chip outputs a PWM control signal, the pin 3 of the second chip outputs a high level to enable the fourth resistor and the first resistor to be in a parallel connection state, even if the intensity of ambient light slightly varies, the 5 th pin of the second chip can be in a high level, the phenomenon of flashing when possible ambient light changes slightly is avoided, timing is started in the second chip, the second chip works according to the preset requirement of outputting different PWM control signals in different time periods, when the 5 th pin of the second chip collects the ambient light again to enable the direct current voltage signal output by the light induction circuit to be smaller than the voltage threshold value set in the second chip, the 3 rd pin of the second chip is in a low level, the 4 th pin of the second chip is kept in the low level, the 5 th pin of the second chip enters an interrupt input state again, the intelligent control circuit enters a dormant state, and the circuit is simple in structure, low in cost and flexible in control mode on the basis of realizing enough functions.
The multi-section constant current circuit comprises a fifth resistor, a sixth resistor, a seventh resistor and a third chip with the model of SM2318, one end of the fifth resistor is a high-voltage power supply end of the multi-section constant current circuit, the other end of the fifth resistor is connected with the 8 th pin of the third chip, the 2 nd pin of the third chip is a low-voltage power supply end of the multi-section constant current circuit, the 7 th pin of the third chip is a first output end of the multi-section constant current circuit, the 6 th pin of the third chip is a second output end of the multi-section constant current circuit, the 5 th pin of the third chip is a third output end of the multi-section constant current circuit, the 1 st pin of the third chip is connected with one end of the sixth resistor, the connecting end of the third pin is a control end of the multi-section constant current circuit, the 4 th pin of the third chip is connected with one end of the seventh resistor, the bottom electrode of the third chip, the other end of the sixth resistor and the other end of the seventh resistor are connected, and the connecting end of the bottom electrode of the third chip and the other end of the sixth resistor is the grounding end of the multi-section constant current circuit. The third chip in the circuit can provide low-current low-voltage stabilized voltage for the voltage stabilizing circuit, meanwhile, the conduction and the cut-off of three output ends in the 1 st pin control circuit are achieved, the structure is simple, the requirement that the input characteristic of the LED lamp circuit is high power factor can be met, the multiple third chips can be connected in parallel to enlarge power output, and the efficient electric energy conversion efficiency is achieved.
Compared with the prior art, the LED constant-current circuit has the advantages that the first LED light-emitting circuit, the second LED light-emitting circuit and the third LED light-emitting circuit are sequentially connected in series by arranging the voltage stabilizing circuit, the multi-section constant-current circuit, the second LED light-emitting circuit and the third LED light-emitting circuit, and the first LED light-emitting circuit is connected with the direct-current voltage output by the rectifying circuit; recording the on-state voltage of the first LED light-emitting circuit as V1, the on-state voltage of the second LED light-emitting circuit as V2, the on-state voltage of the third LED light-emitting circuit as V3, and the voltage value of the pulsating direct-current voltage output by the rectifying circuit at a certain moment as Vt; the intelligent control circuit and the multi-section constant current circuit respectively have two working modes: the intelligent control circuit comprises a normal working mode and a sleep mode, wherein a voltage threshold is arranged in the intelligent control circuit, when the intelligent control circuit is in the sleep mode, the intelligent control circuit outputs a low level to control the multi-section constant current circuit to enter the sleep mode, the first LED light-emitting circuit, the second LED light-emitting circuit and the third LED light-emitting circuit do not emit light, and the low voltage generated by the multi-section constant current circuit is subjected to voltage stabilization processing by a voltage stabilizing circuit and then provides a power supply for the light-sensing circuit and the intelligent control circuit; when the intelligent control circuit is in a sleep mode, the intelligent control circuit reads a direct current voltage signal output by the light sensing circuit in real time, when the direct current voltage signal output by the light sensing circuit is larger than or equal to a voltage threshold value, the intelligent control circuit is awakened to enter a normal working mode, and at the moment, the intelligent control circuit generates a PWM control signal and outputs the PWM control signal to the multi-section constant current circuit to control the multi-section constant current circuit to enter the normal working mode; when intelligent control circuit and multistage constant current circuit are in normal operating mode, when PWM control signal is in high level moment: if Vt is less than V1, the first LED light-emitting circuit, the second LED light-emitting circuit and the third LED light-emitting circuit do not emit light; if V1 is not more than Vt < V1+ V2, the multi-section constant current circuit controls the first LED light-emitting circuit to emit light and controls the second LED light-emitting circuit and the third LED light-emitting circuit not to emit light; if V1+ V2 is not more than Vt < V1+ V2+ V3, the multi-section constant current circuit controls the first LED light-emitting circuit and the second LED light-emitting circuit to be in a series connection state, currents with the same magnitude flow through the first LED light-emitting circuit and the second LED light-emitting circuit to emit light simultaneously, and the third LED light-emitting circuit is controlled not to emit light; if the Vt is larger than or equal to V1+ V2+ V3, the multi-section constant current circuit controls the first LED light-emitting circuit, the second LED light-emitting circuit and the third LED light-emitting circuit to be in a serial connection state, and currents with the same magnitude flow through the first LED light-emitting circuit, the second LED light-emitting circuit and the third LED light-emitting circuit to emit light simultaneously; when the PWM control signal is at a low level moment, the multi-section constant current circuit controls the first LED light-emitting circuit, the second LED light-emitting circuit and the third LED light-emitting circuit to emit light; when the intelligent control circuit is in a normal working mode, the pulsating direct-current voltage output by the rectifying circuit is subjected to voltage stabilization processing by the voltage stabilizing circuit and then provides a power supply for the light sensing circuit and the intelligent control circuit; when the intelligent control circuit is in a normal working mode, the intelligent control circuit acquires a signal whether the first LED light-emitting circuit is conducted to emit light in real time, when the first LED light-emitting circuit is conducted to emit light, the intelligent control circuit acquires a high level, when the first LED light-emitting circuit is not conducted to emit light, the intelligent control circuit acquires a low level, the intelligent control circuit reads a direct current voltage signal output by the photoinduction circuit when the first LED light-emitting circuit is not conducted, namely when the pulsating direct current voltage output by the rectification circuit is at a low moment and any LED light-emitting circuit cannot emit light, at the moment, if the direct current voltage signal output by the photoinduction circuit is larger than or equal to a voltage threshold value, the intelligent control circuit keeps the current normal working mode unchanged, and if the direct current voltage signal output by the photoinduction circuit is smaller than the voltage threshold value, the intelligent control circuit finishes, entering the sleep mode again; the intelligent control circuit starts timing after entering a normal working mode, and can output PWM control signals with different duty ratios in different time periods to adjust the brightness of the LED lamp circuit in the normal working mode according to requirements preset by a user; therefore, the invention replaces the voltage conversion circuit with the voltage stabilizing circuit to supply power for the photoreaction circuit and the intelligent control circuit, has lower cost, when the intelligent control circuit is in a sleep mode and works normally, the voltage stabilizing circuit adopts different voltage power supply modes, the invention can utilize the ambient light intensity as a reference time point on the basis of realizing two automatic control functions of turning on the lamp and turning off the lamp, the intelligent control circuit can preset a plurality of time periods and the duty ratio of PWM control signals in each time period according to requirements to realize the automatic regulation of the luminous intensity of each time period, and the control mode of the multi-section constant current circuit in the invention not only can reduce the power consumption of the multi-section constant current circuit, but also can realize that the input characteristic of the LED lamp circuit is high power factor, thereby meeting the requirements of more users.
Drawings
Fig. 1 is a block diagram of a conventional intelligent light-controlled linear LED lamp circuit;
FIG. 2 is a block diagram of the structure of an intelligent light-controlled linear LED lamp circuit of the present invention;
fig. 3 is a circuit diagram of an intelligent light-controlled linear LED lamp circuit of the present invention.
Detailed Description
The invention is described in further detail below with reference to the accompanying examples.
The first embodiment is as follows: as shown in fig. 2, an intelligent light-controlled linear LED lamp circuit includes a rectifying circuit, a light-sensing circuit, an intelligent control circuit and a first LED light-emitting circuit, the rectifying circuit converts commercial power ac into pulsating dc voltage for output, the light-sensing circuit converts an external light signal into a dc voltage signal for output, the dc voltage signal output by the light-sensing circuit becomes larger as the intensity of the light signal becomes smaller, the intelligent light-controlled linear LED lamp circuit further includes a voltage stabilizing circuit, a multi-stage constant current circuit, a second LED light-emitting circuit and a third LED light-emitting circuit, the first LED light-emitting circuit, the second LED light-emitting circuit and the third LED light-emitting circuit are sequentially connected in series, and the first LED light-emitting circuit is connected to the dc voltage output by the rectifying circuit; recording the on-state voltage of the first LED light-emitting circuit as V1, the on-state voltage of the second LED light-emitting circuit as V2, the on-state voltage of the third LED light-emitting circuit as V3, and the voltage value of the pulsating direct-current voltage output by the rectifying circuit at a certain moment as Vt; the intelligent control circuit and the multi-section constant current circuit respectively have two working modes: the intelligent control circuit comprises a normal working mode and a sleep mode, wherein a voltage threshold is arranged in the intelligent control circuit, when the intelligent control circuit is in the sleep mode, the intelligent control circuit outputs a low level to control the multi-section constant current circuit to enter the sleep mode, the first LED light-emitting circuit, the second LED light-emitting circuit and the third LED light-emitting circuit do not emit light, and the low voltage generated by the multi-section constant current circuit is subjected to voltage stabilization processing by a voltage stabilizing circuit and then provides a power supply for the light-sensing circuit and the intelligent control circuit; when the intelligent control circuit is in a sleep mode, the intelligent control circuit reads a direct current voltage signal output by the light sensing circuit in real time, when the direct current voltage signal output by the light sensing circuit is larger than or equal to a voltage threshold value, the intelligent control circuit is awakened to enter a normal working mode, and at the moment, the intelligent control circuit generates a PWM control signal and outputs the PWM control signal to the multi-section constant current circuit to control the multi-section constant current circuit to enter the normal working mode; when intelligent control circuit and multistage constant current circuit are in normal operating mode, when PWM control signal is in high level moment: if Vt is less than V1, the first LED light-emitting circuit, the second LED light-emitting circuit and the third LED light-emitting circuit do not emit light; if V1 is not more than Vt < V1+ V2, the multi-section constant current circuit controls the first LED light-emitting circuit to emit light and controls the second LED light-emitting circuit and the third LED light-emitting circuit not to emit light; if V1+ V2 is not more than Vt < V1+ V2+ V3, the multi-section constant current circuit controls the first LED light-emitting circuit and the second LED light-emitting circuit to be in a series connection state, currents with the same magnitude flow through the first LED light-emitting circuit and the second LED light-emitting circuit to emit light simultaneously, and the third LED light-emitting circuit is controlled not to emit light; if the Vt is larger than or equal to V1+ V2+ V3, the multi-section constant current circuit controls the first LED light-emitting circuit, the second LED light-emitting circuit and the third LED light-emitting circuit to be in a serial connection state, and currents with the same magnitude flow through the first LED light-emitting circuit, the second LED light-emitting circuit and the third LED light-emitting circuit to emit light simultaneously; when the PWM control signal is at a low level moment, the multi-section constant current circuit controls the first LED light-emitting circuit, the second LED light-emitting circuit and the third LED light-emitting circuit to emit light; when the intelligent control circuit is in a normal working mode, the pulsating direct-current voltage output by the rectifying circuit is subjected to voltage stabilization processing by the voltage stabilizing circuit and then provides a power supply for the light sensing circuit and the intelligent control circuit; when the intelligent control circuit is in a normal working mode, the intelligent control circuit acquires a signal whether the first LED light-emitting circuit is conducted to emit light in real time, when the first LED light-emitting circuit is conducted to emit light, the intelligent control circuit acquires a high level, when the first LED light-emitting circuit is not conducted to emit light, the intelligent control circuit acquires a low level, the intelligent control circuit reads a direct current voltage signal output by the photoinduction circuit when the first LED light-emitting circuit is not conducted, namely when the pulsating direct current voltage output by the rectification circuit is at a low moment and any LED light-emitting circuit cannot emit light, at the moment, if the direct current voltage signal output by the photoinduction circuit is larger than or equal to a voltage threshold value, the intelligent control circuit keeps the current normal working mode unchanged, and if the direct current voltage signal output by the photoinduction circuit is smaller than the voltage threshold value, the intelligent control circuit finishes, entering the sleep mode again; the intelligent control circuit starts timing after entering a normal working mode, and can output PWM control signals with different duty ratios to adjust the brightness of the LED lamp circuit in different time periods under the normal working mode according to requirements preset by a user.
As shown in fig. 2, in this embodiment, the rectifying circuit has a live wire input terminal, a zero line input terminal, an output terminal and a ground terminal, the photoinduction circuit has a positive electrode, an output terminal and a ground terminal, the first LED light-emitting circuit, the second LED light-emitting circuit and the third LED light-emitting circuit have a positive electrode and a negative electrode respectively, the multi-stage constant current circuit has a first output terminal, a second output terminal, a third output terminal, a high voltage power terminal, a low voltage power terminal, a control terminal and a ground terminal, the voltage stabilizing circuit has a first input terminal, a second input terminal, an output terminal and a ground terminal, the intelligent control circuit has a positive electrode, a first input terminal, a second input terminal, an output terminal and a ground terminal, the live wire input terminal of the rectifying circuit is connected with the live wire of the commercial power, the zero line input terminal of the rectifying circuit is connected with the, the negative electrode of the first LED light-emitting circuit, the positive electrode of the second LED light-emitting circuit, the first input end of the intelligent control circuit and the first output end of the multi-section constant current circuit are connected, the negative electrode of the second LED light-emitting circuit, the positive electrode of the third LED light-emitting circuit and the second output end of the multi-section constant current circuit are connected, the negative electrode of the third LED light-emitting circuit and the third output end of the multi-section constant current circuit are connected, the low-voltage power supply end of the multi-section constant current circuit is connected with the second input end of the voltage stabilizing circuit, and the output, the positive pole of the photoinduction circuit is connected with the positive pole of the intelligent control circuit, the output end of the photoinduction circuit is connected with the second input end of the intelligent control circuit, the output end of the intelligent control circuit is connected with the control end of the multi-section constant current circuit, and the grounding end of the rectifying circuit, the grounding end of the voltage stabilizing circuit, the grounding end of the photoinduction circuit and the grounding end of the intelligent control circuit are connected with the grounding ends of the multi-section constant current circuit.
Example two: this embodiment is substantially the same as the first embodiment, with the following differences:
as shown in fig. 3, in this embodiment, the voltage regulator includes a first capacitor C1, a second capacitor C2, a third capacitor C3, a first diode D1, a second diode D2 and a first chip U1, the first chip U1 is an LDO linear voltage regulator chip, the first chip U1 has an input pin, an output pin and a ground pin, the second capacitor C2 is an electrolytic capacitor, the first diode D1 is a zener diode, one end of the first capacitor C1 is a first input end of the voltage regulator circuit, the other end of the first capacitor C1, a cathode of the first diode D1 and an anode of the second diode D2 are connected, a cathode of the second diode D2, an anode of the second capacitor C2 and the input pin of the first chip U1 are connected, a connection end of the voltage regulator circuit is a second input end of the voltage regulator circuit, an output pin of the first chip U1 and one end of the third capacitor C3 are connected, and a connection end of the third capacitor C3 is an output end of the voltage regulator circuit, The ground pin of the first chip U1, the cathode of the second capacitor C2 and the anode of the first diode D1 are connected, and the connection end is the ground end of the voltage stabilizing circuit.
As shown in fig. 3, in this embodiment, the photo sensing circuit includes a first resistor R1 and a phototransistor Q1, one end of the first resistor R1 is an input end of the photo sensing circuit, the other end of the first resistor R1 is connected to a collector of the phototransistor Q1, a connection end of the first resistor R1 is an output end of the photo sensing circuit, and an emitter of the phototransistor Q1 is a ground end of the photo sensing circuit.
As shown in fig. 3, in this embodiment, the intelligent control circuit includes a second chip U2 with model AI100, a second resistor R2, a third resistor R3, a fourth resistor R4 and a fourth capacitor C4, a pin 1 of the second chip U2 is an anode of the intelligent control circuit, a pin 5 of the second chip U2 is connected to one end of the fourth resistor R4, a connection end of the pin is a second input end of the intelligent control circuit, the other end of the fourth resistor R4 is connected to a pin 3 of the second chip U2, a pin 4 of the second chip U2 is an output end of the intelligent control circuit, one end of the second resistor R2 is a first input end of the intelligent control circuit, and the other end of the second resistor R2, one end of the third resistor R3 and one end of the fourth capacitor C4 are connected with the 6 th pin of the second chip U2, the other end of the third resistor R3 and the other end of the fourth capacitor C4 are connected with the 8 th pin of the second chip U2, and the connection end of the third resistor R3 and the other end of the fourth capacitor C4 are grounded ends of the intelligent control circuit.
As shown in fig. 3, in this embodiment, the multi-stage constant current circuit includes a fifth resistor R5, a sixth resistor R6, a seventh resistor R7, and a third chip U3 with model number SM2318, one end of the fifth resistor R5 is a high-voltage power supply end of the multi-stage constant current circuit, the other end of the fifth resistor R5 is connected to the 8 th pin of the third chip U3, the 2 nd pin of the third chip U3 is a low-voltage power supply end of the multi-stage constant current circuit, the 7 th pin of the third chip U3 is a first output end of the multi-stage constant current circuit, the 6 th pin of the third chip U3 is a second output end of the multi-stage constant current circuit, the 5 th pin of the third chip U3 is a third output end of the multi-stage constant current circuit, the 1 st pin of the third chip U3 is connected to one end of the sixth resistor R6 and the connection end thereof is a control end of the multi-stage constant current circuit, the 4 th pin of the third chip U3 is connected to one end of the seventh resistor R7, the third pin 3 of the third chip U6 is connected to the bottom end of the multi-stage constant current circuit and the other And (7) a ground terminal.
As shown in fig. 3, in this embodiment, the first LED lighting circuit is formed by connecting a plurality of LED lighting units (LED1-1 to LED1-n) in series, each lighting unit is formed by connecting a plurality of LEDs in parallel, the second LED lighting circuit is formed by connecting a plurality of LED lighting units (LED2-1 to LED2-k) in series, each lighting unit is formed by connecting a plurality of LEDs in parallel, the third LED lighting circuit is formed by connecting a plurality of LED lighting units (LED3-1 to LED3-j) in series, each lighting unit is formed by connecting a plurality of LEDs in parallel, and n, k, and j are integers greater than or equal to 1.
Claims (6)
1. An intelligent light-operated linear LED lamp circuit comprises a rectifying circuit, a light-sensing circuit, an intelligent control circuit and a first LED light-emitting circuit, wherein the rectifying circuit converts commercial power alternating current into pulsating direct current voltage for output, the light-sensing circuit converts an external light signal into a direct current voltage signal for output, and the direct current voltage signal output by the light-sensing circuit becomes larger along with the reduction of the intensity of a light signal; the on-state voltage of the first LED light-emitting circuit is recorded as V1, the on-state voltage of the second LED light-emitting circuit is recorded as V2, the on-state voltage of the third LED light-emitting circuit is recorded as V3, and the voltage value of the pulsating direct-current voltage output by the rectifying circuit at a certain moment is recorded as Vt;
the intelligent control circuit and the multi-section constant current circuit respectively have two working modes: the intelligent control circuit is internally provided with a voltage threshold, when the intelligent control circuit is in the sleep mode, the intelligent control circuit outputs a low level to control the multi-section constant current circuit to enter the sleep mode, the first LED light-emitting circuit, the second LED light-emitting circuit and the third LED light-emitting circuit do not emit light, and at the moment, the low voltage generated by the multi-section constant current circuit is subjected to voltage stabilization processing by the voltage stabilizing circuit and then provides power for the light-sensing circuit and the intelligent control circuit; when the intelligent control circuit is in a sleep mode, the intelligent control circuit reads a direct current voltage signal output by the light induction circuit in real time, when the direct current voltage signal output by the light induction circuit is greater than or equal to the voltage threshold value, the intelligent control circuit is awakened and enters a normal working mode, and at the moment, the intelligent control circuit generates a PWM control signal and outputs the PWM control signal to the multi-section constant current circuit to control the multi-section constant current circuit to enter the normal working mode;
when the intelligent control circuit and the multi-section constant current circuit are in a normal working mode, when the PWM control signal is at a high level moment: if Vt < V1, none of the first LED lighting circuit, the second LED lighting circuit, and the third LED lighting circuit is illuminated; if V1 is not more than Vt < V1+ V2, the multi-section constant current circuit controls the first LED light-emitting circuit to emit light and controls the second LED light-emitting circuit and the third LED light-emitting circuit not to emit light; if V1+ V2 is not more than Vt < V1+ V2+ V3, the multi-section constant current circuit controls the first LED light-emitting circuit and the second LED light-emitting circuit to be in a series connection state, the first LED light-emitting circuit and the second LED light-emitting circuit flow currents with the same magnitude and emit light simultaneously, and the third LED light-emitting circuit is controlled not to emit light; if Vt is larger than or equal to V1+ V2+ V3, the multi-section constant current circuit controls the first LED light-emitting circuit, the second LED light-emitting circuit and the third LED light-emitting circuit to be in a serial connection state, and currents with the same magnitude flow through the first LED light-emitting circuit, the second LED light-emitting circuit and the third LED light-emitting circuit to emit light simultaneously; when the PWM control signal is at a low level moment, the multi-section constant current circuit controls the first LED light-emitting circuit, the second LED light-emitting circuit and the third LED light-emitting circuit not to emit light;
when the intelligent control circuit is in a normal working mode, the pulsating direct-current voltage output by the rectifying circuit is subjected to voltage stabilization processing by the voltage stabilizing circuit and then provides a power supply for the light sensing circuit and the intelligent control circuit; when the intelligent control circuit is in a normal working mode, the intelligent control circuit acquires a signal whether the first LED light-emitting circuit is conducted to emit light in real time, when the first LED light-emitting circuit is conducted to emit light, the intelligent control circuit acquires a high level, when the first LED light-emitting circuit is not conducted to emit light, the intelligent control circuit acquires a low level, the intelligent control circuit reads a direct current voltage signal output by the photoinduction circuit when the first LED light-emitting circuit is not conducted, namely when the pulsating direct current voltage output by the rectifying circuit is at a low moment and any LED light-emitting circuit cannot emit light, and at the moment, if the direct current voltage signal output by the photoinduction circuit is greater than or equal to the voltage threshold value, the intelligent control circuit keeps the current normal working mode unchanged, if the direct current voltage signal output by the light sensing circuit is smaller than the voltage threshold, the intelligent control circuit finishes the current normal working mode and enters the sleep mode again;
the intelligent control circuit starts timing after entering a normal working mode, and can output PWM control signals with different duty ratios in different time periods to adjust the brightness of the LED lamp circuit in the normal working mode according to requirements preset by a user.
2. An intelligent light-operated linear LED lamp circuit according to claim 1, wherein the rectifying circuit has a live wire input terminal, a neutral wire input terminal, an output terminal and a ground terminal, the light-sensing circuit has a positive terminal, an output terminal and a ground terminal, the first LED light-emitting circuit, the second LED light-emitting circuit and the third LED light-emitting circuit respectively have a positive terminal and a negative terminal, the multi-section constant current circuit has a first output terminal, a second output terminal, a third output terminal, a high voltage power terminal, a low voltage power terminal, a control terminal and a ground terminal, the voltage stabilizing circuit has a first input terminal, a second input terminal, an output terminal and a ground terminal, the intelligent control circuit has a positive terminal, a first input terminal, a second input terminal, an output terminal and a ground terminal, the live wire input terminal of the rectifying circuit is connected to the live wire of the commercial power, the neutral wire input terminal of the rectifying circuit is connected to, the output end of the rectifying circuit, the anode of the first LED light-emitting circuit, the high-voltage power supply end of the multi-section constant current circuit are connected with the first input end of the voltage stabilizing circuit, the cathode of the first LED light-emitting circuit, the anode of the second LED light-emitting circuit and the first input end of the intelligent control circuit are connected with the first output end of the multi-section constant current circuit, the cathode of the second LED light-emitting circuit, the anode of the third LED light-emitting circuit are connected with the second output end of the multi-section constant current circuit, the cathode of the third LED light-emitting circuit is connected with the third output end of the multi-section constant current circuit, the low-voltage power supply end of the multi-section constant current circuit is connected with the second input end of the voltage stabilizing circuit, and the output end of the voltage stabilizing circuit, the anode of the light-sensing circuit are connected with the anode of the intelligent control circuit, the output end of the light-sensing circuit is connected with the second input end of the intelligent control circuit, the output end of the intelligent control circuit is connected with the control ends of the multi-section constant current circuits, and the grounding end of the rectifying circuit, the grounding end of the voltage stabilizing circuit, the grounding end of the light-sensing circuit and the grounding end of the intelligent control circuit are connected with the grounding ends of the multi-section constant current circuits.
3. An intelligent light-operated linear LED lamp circuit according to claim 2, wherein the voltage regulator circuit comprises a first capacitor, a second capacitor, a third capacitor, a first diode, a second diode and a first chip, the first chip is an LDO linear voltage regulator chip, the first chip has an input pin, an output pin and a ground pin, the second capacitor is an electrolytic capacitor, the first diode is a voltage regulator diode, one end of the first capacitor is a first input end of the voltage regulator circuit, the other end of the first capacitor, the cathode of the first diode and the anode of the second diode are connected, the cathode of the second diode, the anode of the second capacitor and the input pin of the first chip are connected, and the connection end of the first capacitor and the output pin of the third capacitor are connected, and the connection end of the first chip and the input pin of the voltage regulator circuit are connected, respectively The other end of the third capacitor, the grounding pin of the first chip, the cathode of the second capacitor and the anode of the first diode are connected, and the connecting end of the third capacitor, the grounding pin of the first chip, the cathode of the second capacitor and the anode of the first diode are grounded ends of the voltage stabilizing circuit.
4. An intelligent light-operated linear LED lamp circuit according to claim 2, wherein the light-sensing circuit comprises a first resistor and a phototransistor, one end of the first resistor is an input end of the light-sensing circuit, the other end of the first resistor is connected with a collector of the phototransistor, a connection end of the first resistor is an output end of the light-sensing circuit, and an emitter of the phototransistor is a ground end of the light-sensing circuit.
5. An intelligent light-operated linear LED lamp circuit according to claim 2, wherein the intelligent control circuit comprises a second chip of type AI100, a second resistor, a third resistor, a fourth resistor and a fourth capacitor, wherein pin 1 of the second chip is an anode of the intelligent control circuit, pin 5 of the second chip is connected with one end of the fourth resistor, a connection end of the second resistor is a second input end of the intelligent control circuit, the other end of the fourth resistor is connected with pin 3 of the second chip, pin 4 of the second chip is an output end of the intelligent control circuit, one end of the second resistor is a first input end of the intelligent control circuit, the other end of the second resistor, one end of the third resistor, one end of the fourth capacitor is connected with pin 6 of the second chip, the other end of the third resistor, the other end of the fourth capacitor and the 8 th pin of the second chip are connected, and the connecting end of the third resistor and the connecting end of the fourth capacitor is the grounding end of the intelligent control circuit.
6. An intelligent light-operated linear LED lamp circuit according to claim 2, characterized in that the multi-segment constant current circuit comprises a fifth resistor, a sixth resistor, a seventh resistor and a third chip with model number SM2318, one end of the fifth resistor is a high-voltage power supply end of the multi-segment constant current circuit, the other end of the fifth resistor is connected with a pin 8 of the third chip, a pin 2 of the third chip is a low-voltage power supply end of the multi-segment constant current circuit, a pin 7 of the third chip is a first output end of the multi-segment constant current circuit, a pin 6 of the third chip is a second output end of the multi-segment constant current circuit, a pin 5 of the third chip is a third output end of the multi-segment constant current circuit, a pin 1 of the third chip is connected with one end of the sixth resistor, and the connection end of the pin is a control end of the multi-segment constant current circuit, the 4 th pin of the third chip is connected with one end of the seventh resistor, the bottom electrode of the third chip, the other end of the sixth resistor and the other end of the seventh resistor are connected, and the connecting end of the bottom electrode of the third chip, the other end of the sixth resistor and the other end of the seventh resistor is the grounding end of the multi-section constant current circuit.
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| CN111031636B (en) * | 2019-12-31 | 2022-05-27 | 鹰潭阳光照明有限公司 | Light-operated LED lamp circuit capable of setting working mode |
| CN111148320B (en) * | 2020-01-14 | 2024-06-07 | 浙江阳光美加照明有限公司 | Light control circuit of LED lamp |
| CN111526628B (en) * | 2020-06-23 | 2024-01-19 | 横店集团得邦照明股份有限公司 | Circuit for changing light state through flashlight of mobile phone and implementation method thereof |
| CN114025448B (en) * | 2021-12-02 | 2023-10-20 | 深圳市源立信照明科技有限公司 | Flat lamp circuit and control method thereof |
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