CN109699105B - LED filament lamp circuit capable of remotely controlling light modulation - Google Patents
LED filament lamp circuit capable of remotely controlling light modulation Download PDFInfo
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- CN109699105B CN109699105B CN201910056333.9A CN201910056333A CN109699105B CN 109699105 B CN109699105 B CN 109699105B CN 201910056333 A CN201910056333 A CN 201910056333A CN 109699105 B CN109699105 B CN 109699105B
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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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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B45/00—Circuit arrangements for operating light-emitting diodes [LED]
- H05B45/20—Controlling the colour of the light
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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B45/00—Circuit arrangements for operating light-emitting diodes [LED]
- H05B45/30—Driver circuits
- H05B45/37—Converter circuits
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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
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- 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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Abstract
本发明公开了一种可遥控调光的LED灯丝灯电路，包括整流滤波电路、电压转换电路、无线控制电路、第一恒流电路、第二恒流电路、LED发光电路和两个电子开关，每个电子开关分别具有正极、负极和控制端，LED发光电路包括两路LED发光单元，且两路LED发光单元中一路的发光颜色为高色温，另一路的发光颜色为低色温，每路LED发光单元分别具有正极和负极，每路LED发光单元均为正极到负极单向导通；优点是只需要通过两根导线引出两个连接端口，漏气风险较低，且LED发光电路为一个整体，非工作状态时不会导致产品外观不足，工作状态时内部LED发光组件亮度一致，照明效果好。
The invention discloses an LED filament lamp circuit that can be remotely dimmed, comprising a rectification filter circuit, a voltage conversion circuit, a wireless control circuit, a first constant current circuit, a second constant current circuit, an LED lighting circuit and two electronic switches. Each electronic switch has a positive pole, a negative pole and a control terminal respectively. The LED lighting circuit includes two LED lighting units, and the lighting color of one of the two LED lighting units is high color temperature, and the lighting color of the other channel is low color temperature. The light-emitting units have positive and negative electrodes respectively, and each LED light-emitting unit is unidirectionally conductive from positive to negative; the advantage is that only two connection ports need to be drawn out through two wires, the risk of air leakage is low, and the LED lighting circuit is a whole, In the non-working state, the appearance of the product will not be insufficient. In the working state, the brightness of the internal LED light-emitting components is consistent, and the lighting effect is good.
Description
Technical Field
The invention relates to an LED filament lamp circuit, in particular to an LED filament lamp circuit capable of remotely controlling light.
Background
The LED filament lamp is used as an omnidirectional light source, has high luminous efficiency and is widely used. The appearance of the LED filament lamp is similar to that of a traditional incandescent lamp, and the LED filament lamp mainly comprises a lamp holder, an LED glass bulb and an LED driving power supply arranged in the inner space of the lamp holder. The LED filament lamp comprises a lamp holder, a light-emitting diode (LED) filament lamp, a light-emitting diode (LED) glass bulb, a light-emitting diode (LED) driving power supply and an LED light-emitting circuit, wherein the lamp holder of the LED filament lamp is provided with two electrodes which are used as two ports of the LED filament lamp for connecting a mains supply, the LED glass bulb comprises a sealed and light-transmitting glass bulb and the LED light-emitting circuit is arranged in the glass bulb, and the LED. The LED driving power supply is provided with two input ports and a plurality of output ends, the input end of the LED driving power supply is connected with the electrode of the lamp cap, the output end of the LED driving power supply is required to be connected with the LED light-emitting circuit, and therefore the connecting port of the LED light-emitting circuit is required to be LED out of the glass bulb through a lead to be connected with the LED driving power supply. In order to prolong the service life of the LED filament lamp circuit, the glass bulb is filled with gas for heat dissipation, and the sealing performance of the LED glass bulb is required to be good, so that the smaller the number of the lead-out wires of the LED glass bulb is, the better the sealing performance is.
In recent years, LED filament lamps are gradually becoming intelligent, and LED filament lamps capable of dimming by remote control are also widely used as a mainstream intelligent LED filament lamp. As shown in fig. 1, the existing remote-control dimming LED filament lamp circuit mainly includes a rectifying and filtering circuit, a voltage converting circuit, a wireless control circuit, a first constant current circuit, a second constant current circuit, a first LED light emitting circuit and a second LED light emitting circuit, where the first LED light emitting circuit and the second LED light emitting circuit are located in a glass bulb, and a color temperature of a light emitting color of the first LED light emitting circuit is higher than a color temperature of a light emitting color of the second LED light emitting circuit. The wireless control circuit outputs a first path of PWM pulse width modulation signal at the first output end and outputs a second path of PWM pulse width modulation signal at the second output end according to an external wireless control signal received by the wireless control circuit, the first constant current circuit and the second constant current circuit respectively have a power input end, an output end, a control end and a grounding end, and the first LED light-emitting circuit and the second LED light-emitting circuit respectively have a positive pole and a negative pole. The input end of the live wire of the rectification filter circuit is connected with the live wire of the commercial power, the input end of the zero wire is connected with the zero wire of the commercial power, and the output end of the rectification filter circuit, the input end of the voltage conversion circuit, the power input end of the first constant current circuit, the power input end of the second constant current circuit, the anode of the first LED light-emitting circuit and the anode of the second LED light-emitting circuit are connected; the cathode of the first LED light-emitting circuit is connected with the output end of the first constant current circuit, and the cathode of the second LED light-emitting circuit is connected with the output end of the second constant current circuit; the output end of the voltage conversion circuit is connected with the input end of the wireless control circuit, the first output end of the wireless control circuit is connected with the control end of the first constant current circuit, the second output end of the wireless control circuit is connected with the control end of the second constant current circuit, and the grounding end of the rectification filter circuit, the grounding end of the voltage conversion circuit, the grounding end of the wireless control circuit, the grounding end of the first constant current circuit and the grounding end of the second constant current circuit are connected.
When the LED filament lamp circuit capable of remotely controlling light is connected with a mains supply, the rectifying and filtering circuit converts alternating-current voltage of the mains supply into direct-current voltage to be output at the output end of the rectifying and filtering circuit, the voltage conversion circuit converts the direct-current voltage into low-voltage direct-current voltage suitable for the wireless control circuit to work and transmits the low-voltage direct-current voltage to the wireless control circuit, the wireless control circuit outputs a corresponding first path of control signal at a first output end of the wireless control circuit according to an external wireless control signal after receiving the external wireless control signal, outputs a corresponding second path of control signal at a second output end of the wireless control circuit, the first constant current circuit outputs current with corresponding magnitude at the output end of the first path of control signal to control the first LED light-emitting circuit to emit light, the second constant current circuit outputs current with corresponding magnitude at the output end of the second path of control signal to control the second LED light-emitting circuit to emit light, and the light intensity of the first LED light-, the luminous intensity of the second LED luminous circuit is determined by the current output by the output end of the second constant current circuit. The color temperatures of the light emitting colors of the first LED light emitting circuit and the second LED light emitting circuit are different, and the LED glass bulb can present light of any color between the light emitting colors of the first LED light emitting circuit and the light emitting colors of the second LED light emitting circuit by controlling the current magnitude proportion flowing through the first LED light emitting circuit and the second LED light emitting circuit, so that remote control dimming is realized.
However, the above LED filament lamp circuit capable of remote dimming has the following problems: firstly, three connecting ports, namely the positive connecting end of the first LED light-emitting circuit and the second LED light-emitting circuit, the negative electrode of the first LED light-emitting circuit and the negative electrode of the second LED light-emitting circuit, need to be LED out through three wires, so that the risk of air leakage is high; when the first LED light-emitting circuit and the second LED light-emitting circuit of the LED filament lamp circuit are simultaneously bright, a user can obviously see the color difference between the first LED light-emitting circuit and the second LED light-emitting circuit inside the LED glass bulb, and when the color temperature of the LED filament lamp circuit is adjusted to be the highest or the lowest, either the first LED light-emitting circuit is very dark or not bright or the second LED light-emitting circuit is very dark or not bright, so that the appearance of a product is insufficient.
Disclosure of Invention
The invention aims to solve the technical problem of providing a remote-control dimming LED filament lamp circuit, wherein only two connecting ports of an LED glass bulb of the LED filament lamp circuit need to be LED out of the glass bulb and can be LED out through two wires, so that the air leakage risk is low, the insufficient appearance of a product cannot be caused when the LED glass bulb emits light, and the lighting effect is good.
The technical scheme adopted by the invention for solving the technical problems is as follows: a remote control dimming LED filament lamp circuit comprises a rectifying filter circuit, a voltage conversion circuit, a wireless control circuit, a first constant current circuit, a second constant current circuit and an LED light-emitting circuit, wherein the rectifying filter circuit is provided with a live wire input end, a zero wire 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 wireless control circuit is provided with an input end, a first output end, a second output end and a grounding end, the wireless control circuit outputs a first PWM pulse width modulation signal at the first output end and outputs a second PWM pulse width modulation signal at the second output end after receiving an external wireless control signal, the first constant current circuit and the second constant current circuit are respectively provided with a power supply input end, an output end, a control end and a grounding end, and the output end of the voltage conversion circuit is connected with the input end of the wireless control circuit, the first output end of the wireless control circuit is connected with the control end of the first constant current circuit, the second output end of the wireless control circuit is connected with the control end of the second constant current circuit, the LED filament lamp circuit further comprises two electronic switches, each electronic switch is respectively provided with an anode, a cathode and a control end, when the control end of the electronic switch is connected with a high level, the anode and the cathode are in an open circuit state, when the control end of the electronic switch is connected with a low level, the anode and the cathode are in a short circuit state, the two electronic switches are respectively called as the first electronic switch and the second electronic switch, the LED light-emitting circuit comprises two paths of LED light-emitting units, one path of the LED light-emitting units has a high color temperature, the other path of the LED light-emitting units has a low color temperature, and each path of the LED light-emitting units respectively has an anode and a cathode, each path of the LED light-emitting units are in one-way conduction from the positive electrode to the negative electrode, the positive electrode of one path of the LED light-emitting units with high color temperature is connected with the negative electrode of the other path of the LED light-emitting units with low color temperature, the negative electrode of one path of the LED light-emitting units with high color temperature is connected with the positive electrode of the other path of the LED light-emitting units with low color temperature, the connecting end of the LED light-emitting units is the second connecting end of the LED light-emitting circuit, the output end of the rectification filter circuit, the input end of the voltage conversion circuit, the positive electrode of the first electronic switch, the positive electrode of the second electronic switch, the power input end of the first constant current circuit are connected with the power input end of the second constant current circuit, the negative electrode of the first electronic switch, the control end of the second electronic switch, the output end of the first constant current circuit are connected with the first connecting end of the LED light-emitting circuit, the negative pole of the second electronic switch, the control end of the first electronic switch and the output end of the second constant current circuit are connected with the second connecting end of the LED light-emitting circuit, and the grounding end of the rectification filter circuit, the grounding end of the voltage conversion circuit, the grounding end of the wireless control circuit, the grounding end of the first constant current circuit and the grounding end of the second constant current circuit are connected.
The first electronic switch comprises a first triode, a first resistor, a second resistor and a first capacitor, the first triode is a PNP type triode, one end of the first resistor is connected with an emitting electrode of the first triode, the connecting end of the first resistor is the anode of the first electronic switch, the other end of the first resistor, one end of the second resistor and one end of the first capacitor are connected with a base electrode of the first triode, the other end of the first capacitor is connected with the other end of the second resistor, the connecting end of the first capacitor is the control end of the first electronic switch, and the collector electrode of the first triode is the cathode of the first electronic switch; the second electronic switch comprises a second triode, a third resistor, a fourth resistor and a second capacitor, the second triode is a PNP type triode, one end of the third resistor is connected with an emitting electrode of the second triode, a connecting end of the third resistor is the anode of the second electronic switch, the other end of the third resistor is connected with one end of the fourth resistor, one end of the second capacitor is connected with a base electrode of the second triode, the other end of the fourth resistor is connected with the other end of the second capacitor, a connecting end of the fourth resistor is the control end of the second electronic switch, and a collector of the second triode is the cathode of the second electronic switch.
The first constant current circuit and the second constant current circuit are realized by adopting a first integrated circuit chip with the model number of SM2123E and a peripheral circuit thereof, the peripheral circuit comprises a fifth resistor, a sixth resistor, a seventh resistor and an eighth resistor, the 6 th pin of the first integrated circuit chip is the output end of the first constant current circuit, the 5 th pin of the first integrated circuit chip is the output end of the second constant current circuit, the 1 st pin of the first integrated circuit chip is connected with one end of the fifth resistor, the connecting end of the first pin is the control end of the first constant current circuit, the 3 rd pin of the first integrated circuit chip is connected with one end of the sixth resistor, the connecting end of the first pin is the control end of the second constant current circuit, the 2 nd pin of the first integrated circuit chip is connected with one end of the seventh resistor, the 4 th pin of the first integrated circuit chip is connected with one end of the eighth resistor, the bottom electrode of the first integrated circuit chip, the other end of the fifth resistor and the other end of the seventh resistor are connected, the connecting ends of the bottom electrode of the first integrated circuit chip and the fifth resistor are connected with the other end of the seventh resistor, the bottom electrode of the first integrated circuit chip and the other end of the sixth resistor are connected with the other end of the eighth resistor, the connecting ends of the bottom electrode of the first integrated circuit chip and the sixth resistor are connected with the grounding end of the second constant current circuit, and the 8 th pin of the first integrated circuit chip is used as the power supply input end of the first constant current circuit and the power supply input end of the second constant current circuit. In the circuit, the main circuits of the first constant current circuit and the second constant current circuit are realized by adopting a first integrated circuit chip, so that the number of peripheral elements is reduced, and the cost is low.
The voltage conversion circuit comprises a second integrated circuit chip with the model number of SM7035, a ninth resistor, a tenth resistor, an eleventh resistor, a third capacitor, a fourth capacitor, a fifth capacitor, a sixth capacitor, a first diode and a first inductor, the fifth capacitor is an electrolytic capacitor, the first diode is a high-frequency rectifier diode, the 5 th pin of the second integrated circuit chip is the input end of the voltage conversion circuit, the 1 st pin of the second integrated circuit chip is connected with one end of the third capacitor, the 3 rd pin of the second integrated circuit chip, one end of the ninth resistor and one end of the tenth resistor are connected, the 2 nd pin of the second integrated circuit chip, the other end of the third capacitor, the other end of the ninth resistor, one end of the fourth capacitor, one end of the first inductor and the negative electrode of the first diode are connected, the other end of the tenth resistor, one end of the eleventh resistor, the other end of the fourth capacitor, the anode of the fifth capacitor, one end of the sixth capacitor and the other end of the first inductor are connected, the connection ends of the sixth capacitor and the anode of the first diode and the cathode of the eleventh resistor are connected, the connection ends of the sixth capacitor and the anode of the first diode are the output end of the voltage conversion circuit, and the connection ends of the sixth capacitor and the anode of the first diode and the cathode of the eleventh resistor are the ground end of the voltage conversion circuit. The voltage conversion circuit is realized by adopting a constant voltage output circuit in a conventional voltage reduction mode, and has the advantages of simple circuit structure and lower cost.
The LED light-emitting circuit comprises n LED light-emitting components, wherein n is an integer greater than or equal to 1, each LED light-emitting component comprises a first LED light-emitting module and a second LED light-emitting module, each LED light-emitting module is provided with a positive electrode and a negative electrode, the light-emitting color of the first LED light-emitting module is high color temperature, the light-emitting color of the second LED light-emitting module is low color temperature, the first LED light-emitting module and the second LED light-emitting module are respectively provided with a positive electrode and a negative electrode, the first LED light-emitting module and the second LED light-emitting module are both in one-way conduction from the positive electrode to the negative electrode, the positive electrode of the first LED light-emitting module and the negative electrode of the second LED light-emitting module are connected, the connecting end of the first LED light-emitting module and the negative electrode of the second LED light-emitting module are connected, and the connecting end of the first LED light-emitting module and the negative electrode of the second LED light-emitting module are connected, when n is equal to or greater than 2, the first connecting end of the 1 st LED light-emitting component is the first connecting end of the LED light-emitting circuit, the first LED light-emitting module of the LED light-emitting component forms one path of LED light-emitting unit of the LED light-emitting circuit, the second LED light-emitting module of the LED light-emitting component forms the other path of LED light-emitting unit of the LED light-emitting circuit, when n is greater than or equal to 2, the first connecting end of the 1 st LED light-emitting component is the first connecting end of the LED light-emitting circuit, the second connecting end of the jth LED light-emitting component is connected with the first connecting end of the j +1 th LED light-emitting component, the second connecting end of the nth LED light-emitting component is the second connecting end of the LED light-emitting circuit, and the first LED light-emitting module of the LED light-emitting component forms one path of LED light-emitting unit of the LED light-emitting circuit package, the second LED light-emitting module of the LED light-emitting component forms the other path of LED light-emitting unit of the LED light-emitting circuit package, j is 1, 2, …, n-1, n first LED light-emitting modules of the LED light-emitting components form one path of LED light-emitting unit of the LED light-emitting circuit, and n second LED light-emitting modules of the LED light-emitting components form the other path of LED light-emitting unit of the LED light-emitting circuit.
Rectifier filter circuit include full-bridge rectifier bridge and seventh electric capacity, the seventh electric capacity be electrolytic capacitor, the 1 st foot of full-bridge rectifier bridge do rectifier filter circuit's live wire input, the 3 rd foot of full-bridge rectifier bridge do rectifier filter circuit's zero line input, the 2 nd foot of full-bridge rectifier bridge with the positive pole of seventh electric capacity connect and its link do rectifier filter circuit's output, the 4 th foot of full-bridge rectifier bridge with the negative pole of seventh electric capacity connect and its link do rectifier filter circuit's earthing terminal.
Compared with the prior art, the invention has the advantages that by arranging two electronic switches, each electronic switch is respectively provided with an anode, a cathode and a control end, when the control end of the electronic switch is connected with a high level, the anode and the cathode are in an open circuit state, when the control end of the electronic switch is connected with a low level, the anode and the cathode are in a short circuit state, the two electronic switches are respectively called as a first electronic switch and a second electronic switch, the LED light-emitting circuit comprises two paths of LED light-emitting units, one path of the two paths of LED light-emitting units has a high color temperature, the other path of the two paths of LED light-emitting units has a low color temperature, each path of LED light-emitting units respectively has an anode and a cathode, each path of LED light-emitting units is in unidirectional conduction from the anode to the cathode, the anode of one path of LED light-emitting units with the high color temperature is connected with the cathode of the other path of LED light-emitting units with the, the negative electrode of one path of LED luminous unit with high color temperature is connected with the positive electrode of the other path of LED luminous unit with low color temperature, the connecting end of the LED luminous unit is the second connecting end of the LED luminous circuit, the output end of the rectifying filter circuit, the input end of the voltage conversion circuit, the positive electrode of the first electronic switch, the positive electrode of the second electronic switch, the power supply input end of the first constant current circuit are connected with the power supply input end of the second constant current circuit, the negative electrode of the first electronic switch, the control end of the second electronic switch, the output end of the first constant current circuit is connected with the first connecting end of the LED light-emitting circuit, the negative electrode of the second electronic switch, the control end of the first electronic switch and the output end of the second constant current circuit are connected with the second connecting end of the LED light-emitting circuit, and the grounding end of the rectification filter circuit, the grounding end of the voltage conversion circuit, the grounding end of the wireless control circuit and the grounding end of the first constant current circuit are connected with the grounding end of the second constant current circuit; when the LED filament lamp circuit is connected with a mains supply, the rectifying and filtering circuit converts alternating-current voltage of the mains supply into high-voltage direct-current voltage to be output at the output end of the rectifying and filtering circuit, the voltage conversion circuit converts the high-voltage direct-current voltage output by the rectifying and filtering circuit into low-voltage direct-current voltage suitable for the wireless control circuit to work, the wireless control circuit outputs a first PWM pulse width modulation signal at a first output end of the wireless control circuit after receiving an external wireless control signal, a second PWM pulse width modulation signal at a second output end of the wireless control circuit, when a signal received by an input end of a first constant-current circuit is high level and a signal received by an input end of a second constant-current circuit is low level, an output end of a first constant-current circuit is conducted to the ground in a constant-current mode, an anode and a cathode of a second electronic switch are short-circuited, an output end of the second constant-current circuit is cut off, an anode and a cathode of the first electronic switch The drive current direction of the optical circuit is from the second connecting end to the first connecting end of the LED light-emitting circuit, and the LED light-emitting circuit emits low-color-temperature light; when the signal received by the input end of the first constant current circuit is in a low level and the signal received by the input end of the second constant current circuit is in a high level, the output end of the first constant current circuit is cut off, the anode and the cathode of the second electronic switch are in an open circuit, the output end of the second constant current circuit is in a ground constant current conduction state, the anode and the cathode of the first electronic switch are in a short circuit state, the high-voltage direct current voltage output by the output end of the rectifying and filtering circuit is loaded to the LED light-emitting circuit through the first electronic switch and the second constant current circuit, the driving current direction is from the first connecting end to the second connecting end of the LED light-emitting circuit, the LED light-emitting circuit emits high-color-temperature light, when the signal received by the input end of the first constant current circuit is in a low level, the signal received by the input end of the second constant current circuit is in a low level, the output, the LED light-emitting circuit has the advantages that no current flows through the LED light-emitting circuit, no light is emitted, the first output end and the second output end of the wireless control circuit cannot output high levels at any time, therefore, the high-level LED light-emitting circuit only needs to be LED out of the two connecting ports of the first connecting end and the second connecting end of the LED light-emitting circuit through two wires, the risk of air leakage is low, the LED light-emitting circuit is integrated, the appearance of a product cannot be insufficient in a non-working state, the brightness of the internal LED light-emitting components is consistent in a working state, and the lighting effect is good.
Drawings
Fig. 1 is a block diagram of a conventional remote-control dimming LED filament lamp circuit;
FIG. 2 is a block diagram of the structure of the remote-control dimming LED filament lamp circuit of the present invention;
fig. 3 is a circuit diagram of the remote-controllable dimming LED filament 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, a remote-controlled dimming LED filament lamp circuit includes a rectifying filter circuit, a voltage converting circuit, a wireless control circuit, a first constant current circuit, a second constant current circuit and an LED lighting circuit, the rectifying filter circuit has a live wire input terminal, a zero wire input terminal, an output terminal and a ground terminal, the voltage converting circuit has an input terminal, an output terminal and a ground terminal, the wireless control circuit has an input terminal, a first output terminal, a second output terminal and a ground terminal, the wireless control circuit outputs a first PWM pulse width modulation signal at its first output terminal and a second PWM pulse width modulation signal at its second output terminal according to an external wireless control signal received by the wireless control circuit, the first constant current circuit and the second constant current circuit have a power input terminal, an output terminal, a control terminal and a ground terminal, the output terminal of the voltage converting circuit is connected to the input terminal of the wireless control circuit, the first output end of the wireless control circuit is connected with the control end of the first constant current circuit, the second output end of the wireless control circuit is connected with the control end of the second constant current circuit, the LED filament lamp circuit also comprises two electronic switches, each electronic switch is respectively provided with an anode, a cathode and a control end, when the control end of the electronic switch is connected with a high level, the anode and the cathode are in an open circuit state, when the control end of the electronic switch is connected with a low level, the anode and the cathode are in a short circuit state, the two electronic switches are respectively called as the first electronic switch and the second electronic switch, the LED light circuit comprises two paths of LED light-emitting units, the light-emitting color of one path of the two paths of LED light-emitting units is high color temperature, the light-emitting color of the other path of LED light-emitting units is low color temperature, each path of LED light-emitting unit is respectively provided with an anode and a cathode, and each path of, the positive electrode of one path of LED light-emitting unit is connected with the negative electrode of the other path of LED light-emitting unit, the connecting end of the LED light-emitting unit is a first connecting end of an LED light-emitting circuit, the negative electrode of the other path of LED light-emitting unit is connected with the positive electrode of the other path of LED light-emitting unit, the connecting end of the LED light-emitting unit is a second connecting end of the LED light-emitting circuit, the output end of a rectification filter circuit, the input end of a voltage conversion circuit, the positive electrode of a first electronic switch, the positive electrode of a second electronic switch, the power input end of a first constant current circuit and the power input end of a second constant current circuit are connected, the negative electrode of the first electronic switch, the control end of the second electronic switch, the output end of the first constant current circuit and the first connecting end of the LED light-emitting circuit are connected, the negative electrode of the second electronic switch, the control end, The grounding end of the voltage conversion circuit, the grounding end of the wireless control circuit, the grounding end of the first constant current circuit and the grounding end of the second constant current circuit are connected.
As shown in fig. 3, in this embodiment, the first electronic switch includes a first transistor Q1, a first resistor R1, a second resistor R2, and a first capacitor C1, the first transistor Q1 is a PNP transistor, one end of the first resistor R1 is connected to an emitter of the first transistor Q1, and a connection end of the first resistor R1 is an anode of the first electronic switch, the other end of the first resistor R1, one end of the second resistor R2, and one end of the first capacitor C1 are connected to a base of the first transistor Q1, the other end of the first capacitor C1 is connected to the other end of the second resistor R2, and a connection end of the first capacitor C1 is a control end of the first electronic switch, and a collector of the first transistor Q1 is a cathode of the first electronic switch; the second electronic switch comprises a second triode Q2, a third resistor R3, a fourth resistor R4 and a second capacitor C2, the second triode Q2 is a PNP type triode, one end of the third resistor R3 is connected with an emitting electrode of the second triode Q2, the connecting end of the third resistor R3 is the anode of the second electronic switch, the other end of the third resistor R3, one end of the fourth resistor R4 and one end of the second capacitor C2 are connected with a base electrode of the second triode Q2, the other end of the fourth resistor R4 is connected with the other end of the second capacitor C2, the connecting end of the fourth resistor R4 is the control end of the second electronic switch, and a collector electrode of the second triode Q2 is the cathode of the second electronic switch.
As shown in fig. 3, in this embodiment, the first constant current circuit and the second constant current circuit are implemented by using a first integrated circuit chip U1 with model number SM2123E and peripheral circuits thereof, the peripheral circuits include a fifth resistor R5, a sixth resistor R6, a seventh resistor R7 and an eighth resistor R8, a 6 th pin of the first integrated circuit chip U1 is an output terminal of the first constant current circuit, a 5 th pin of the first integrated circuit chip U1 is an output terminal of the second constant current circuit, one ends of a 1 st pin of the first integrated circuit chip U1 and a fifth resistor R5 are connected and a connection end thereof is a control end of the first constant current circuit, a 3 rd pin of the first integrated circuit chip U1 and one end of the sixth resistor R6 are connected and a connection end thereof is a control end of the second constant current circuit, a 2 nd pin of the first integrated circuit chip U1 and one end of the seventh resistor R7 are connected, a first pin of the first integrated circuit chip U1 and an eighth pin of the eighth resistor R8 are connected, the bottom electrode of the first integrated circuit chip U1, the other end of the fifth resistor R5, and the other end of the seventh resistor R7 are connected, and the connection ends thereof are the ground ends of the first constant current circuit, the bottom electrode of the first integrated circuit chip U1, the other end of the sixth resistor R6, and the other end of the eighth resistor R8 are connected, and the connection ends thereof are the ground ends of the second constant current circuit, and the 8 th pin of the first integrated circuit chip U1 is both the power input end of the first constant current circuit and the power input end of the second constant current circuit.
As shown in fig. 3, in the present embodiment, the voltage converting circuit includes a second integrated circuit chip U2 with model number SM7035, a ninth resistor R9, a tenth resistor R10, an eleventh resistor R11, a third capacitor C3, a fourth capacitor C4, a fifth capacitor C5, a sixth capacitor C6, a first diode D1 and a first inductor L1, the fifth capacitor C5 is an electrolytic capacitor, the first diode D1 is a high-frequency rectifier diode, the 5 th pin of the second integrated circuit chip U2 is an input terminal of the voltage converting circuit, the 1 st pin of the second integrated circuit chip U2 is connected to one terminal of the third capacitor C3, the 3 rd pin of the second integrated circuit chip U2, one terminal of the ninth resistor R9 is connected to one terminal of the tenth resistor R10, the 2 nd pin of the second integrated circuit chip U2, the other terminal of the third capacitor C3, the other terminal of the first resistor R9, one terminal of the first resistor R9, and one terminal of the fourth resistor C867 and the first terminal 3687458, the other end of the tenth resistor R10, one end of the eleventh resistor R11, the other end of the fourth capacitor C4, the anode of the fifth capacitor C5, one end of the sixth capacitor C6, and the other end of the first inductor L1 are connected, and the connection end thereof is the output end of the voltage conversion circuit, the anode of the first diode D1, the other end of the eleventh resistor R11, the cathode of the fifth capacitor C5, and the other end of the sixth capacitor C6 are connected, and the connection end thereof is the ground end of the voltage conversion circuit.
As shown in fig. 3, in this embodiment, the LED lighting circuit includes n LED lighting assemblies, n is an integer greater than or equal to 1, each LED lighting assembly includes a first LED lighting module and a second LED lighting module, each LED lighting module includes a first LED lighting module and a second LED lighting module, the lighting color of the first LED lighting module is a high color temperature, the lighting color of the second LED lighting module is a low color temperature, the first LED lighting module and the second LED lighting module respectively have a positive electrode and a negative electrode, the first LED lighting module and the second LED lighting module are both in one-way conduction from the positive electrode to the negative electrode, the positive electrode of the first LED lighting module is connected to the negative electrode of the second LED lighting module and the connection end thereof is the first connection end of the LED lighting assembly, the negative electrode of the first LED lighting module is connected to the positive electrode of the second LED lighting module and the connection end thereof is the second connection end of the LED lighting assembly, when n is equal to 1, the first connection end of the LED lighting module is the first connection end of the LED lighting, the second connecting end of the LED light-emitting component is the second connecting end of the LED light-emitting circuit, the first LED light-emitting module of the LED light-emitting component forms one path of LED light-emitting unit of the LED light-emitting circuit, the second LED light-emitting module of the LED light-emitting component forms the other path of LED light-emitting unit of the LED light-emitting circuit, when n is more than or equal to 2, the first connecting end of the 1 st LED light-emitting component is the first connecting end of the LED light-emitting circuit, the second connecting end of the jth LED light-emitting component is connected with the first connecting end of the j +1 th LED light-emitting component, the second connecting end of the nth LED light-emitting component is the second connecting end of the LED light-emitting circuit, the first LED light-emitting module of the LED light-emitting component forms one path of LED light-emitting unit of the LED light-emitting circuit package, the second LED light-emitting module of the LED light-emitting component forms the other path of the LED light-emitting circuit package, j is 1, 2, …, n-1, the first, and the second LED light-emitting module of the n LED light-emitting components forms another path of LED light-emitting unit of the LED light-emitting circuit.
As shown in fig. 3, in this embodiment, the rectifying and filtering circuit includes a full-bridge rectifier bridge DB1 and a seventh capacitor C7, the seventh capacitor C7 is an electrolytic capacitor, the 1 st pin of the full-bridge rectifier bridge DB1 is a live wire input terminal of the rectifying and filtering circuit, the 3 rd pin of the full-bridge rectifier bridge DB1 is a zero wire input terminal of the rectifying and filtering circuit, the 2 nd pin of the full-bridge rectifier bridge DB1 is connected to the positive electrode of the seventh capacitor C7 and the connection terminal thereof is an output terminal of the rectifying and filtering circuit, the 4 th pin of the full-bridge rectifier bridge DB1 is connected to the negative electrode of the seventh capacitor C7 and the connection terminal thereof is a ground terminal of the rectifying and filtering circuit.
In this embodiment, the wireless control circuit is implemented by using a mature product in the prior art.
The working principle of the invention is as follows: when the LED filament lamp circuit is connected with a mains supply, the rectifying and filtering circuit converts alternating-current voltage of the mains supply into high-voltage direct-current voltage to be output at the output end of the rectifying and filtering circuit, the voltage conversion circuit converts the high-voltage direct-current voltage output by the rectifying and filtering circuit into low-voltage direct-current voltage suitable for the wireless control circuit to work, the wireless control circuit outputs a first PWM pulse width modulation signal at a first output end of the wireless control circuit after receiving an external wireless control signal, a second PWM pulse width modulation signal at a second output end of the wireless control circuit, when a signal received by an input end of a first constant-current circuit is high level and a signal received by an input end of a second constant-current circuit is low level, an output end of a first constant-current circuit is conducted to the ground in a constant-current mode, an anode and a cathode of a second electronic switch are short-circuited, an output end of the second constant-current circuit is cut off, an anode and a cathode of the first electronic switch The drive current direction of the optical circuit is from the second connecting end to the first connecting end of the LED light-emitting circuit, and the LED light-emitting circuit emits low-color-temperature light; when the signal received by the input end of the first constant current circuit is in a low level, the signal received by the input end of the second constant current circuit is in a high level, the output end of the first constant current circuit is cut off, the anode and the cathode of the second electronic switch are in an open circuit, the output end of the second constant current circuit is in a ground constant current conduction state, the anode and the cathode of the first electronic switch are in a short circuit state, the high-voltage direct current voltage output by the output end of the rectifying and filtering circuit is loaded to the LED light-emitting circuit through the first electronic switch and the second constant current circuit, the driving current direction is from the first connecting end to the second connecting end of the LED light-emitting circuit, the LED light-emitting circuit emits high-color-temperature light, when the signal received by the input end of the first constant current circuit is in a low level, the signal received by the input end of the second constant current circuit is in a low level, the, the LED light-emitting circuit has no current flowing through and does not emit light, and the first output end and the second output end of the wireless control circuit cannot output high level at the same time at any time. The period of the wireless control circuit outputting the control signal is represented as T, the time of the first output end outputting high level is represented as T1, the time of the second output end outputting high level signal is represented as T2, the current when the first constant current circuit is conducted at the output end is represented as I1, the current when the second constant current circuit is conducted at the output end is represented as I2, the average current I1 when the LED light-emitting circuit emits light at low color temperature is represented as (T1/T) × I1, the average current I2 when the LED light-emitting circuit emits light at high color temperature is represented as (T2/T) × I2, and the light-emitting brightness of the LED light-emitting circuit is proportional to the magnitude of the average current no matter the light-emitting light at low color temperature or the light at high color temperature. Therefore, the light emitting brightness of the LED light emitting circuit is proportional to the total current I-I1 + I2, and the light emitting color of the LED light emitting circuit is related to the ratio of I1 to I2. Since the currents I1 and I2 are known data set in advance, and are generally set to be I1-I2, by adjusting the ratio of T1 to T2, the ratio of the light intensities of the high color temperature and the low color temperature can be adjusted, so that the light color of the LED lighting circuit can be adjusted, and the ratio of T1+ T2 in one period T can be changed, so that the brightness of the LED lighting circuit can be adjusted. In order to prevent the phenomenon of flicker which can be sensed by naked eyes, the period T of the wireless control circuit outputting the control signal is less than or equal to 10 mS.
Claims (6)
1. A remote control dimming LED filament lamp circuit comprises a rectifying filter circuit, a voltage conversion circuit, a wireless control circuit, a first constant current circuit, a second constant current circuit and an LED light-emitting circuit, wherein the rectifying filter circuit is provided with a live wire input end, a zero wire 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 wireless control circuit is provided with an input end, a first output end, a second output end and a grounding end, the wireless control circuit outputs a first PWM pulse width modulation signal at the first output end and outputs a second PWM pulse width modulation signal at the second output end after receiving an external wireless control signal, the first constant current circuit and the second constant current circuit are respectively provided with a power supply input end, an output end, a control end and a grounding end, and the output end of the voltage conversion circuit is connected with the input end of the wireless control circuit, the wireless control circuit is characterized in that the LED filament lamp circuit also comprises two electronic switches, each electronic switch is respectively provided with an anode, a cathode and a control end, when the control end of the electronic switch is connected with a high level, the anode and the cathode are in an open circuit state, when the control end of the electronic switch is connected with a low level, the anode and the cathode are in a short circuit state, the two electronic switches are respectively called as a first electronic switch and a second electronic switch, the LED light-emitting circuit comprises two paths of LED light-emitting units, one path of the two paths of LED light-emitting units has a high color temperature, and the other path of the two paths of LED light-emitting units has a low color temperature, each path of LED luminous unit is respectively provided with an anode and a cathode, each path of LED luminous unit is in one-way conduction from the anode to the cathode, one path of LED luminous unit with high color temperature is connected with the cathode of the other path of LED luminous unit with low color temperature, the connecting end of the LED luminous unit is a first connecting end of the LED luminous circuit, the cathode of one path of LED luminous unit with high color temperature is connected with the anode of the other path of LED luminous unit with low color temperature, the connecting end of the LED luminous unit is a second connecting end of the LED luminous circuit, the output end of the rectification filter circuit, the input end of the voltage conversion circuit, the anode of the first electronic switch, the anode of the second electronic switch, the power input end of the first constant current circuit and the power input end of the second constant current circuit are connected, and the cathode of the first electronic switch, the anode of the second electronic switch, the cathode of the second constant current circuit and the cathode of the second electronic switch are connected with, The control end of the second electronic switch, the output end of the first constant current circuit and the first connecting end of the LED light-emitting circuit are connected, the negative electrode of the second electronic switch, the control end of the first electronic switch and the output end of the second constant current circuit are connected with the second connecting end of the LED light-emitting circuit, and the grounding end of the rectification filter circuit, the grounding end of the voltage conversion circuit, the grounding end of the wireless control circuit, the grounding end of the first constant current circuit and the grounding end of the second constant current circuit are connected.
2. The circuit according to claim 1, wherein the first electronic switch comprises a first triode, a first resistor, a second resistor and a first capacitor, the first triode is a PNP type triode, one end of the first resistor is connected to the emitter of the first triode, and the connection end of the first resistor is the positive electrode of the first electronic switch, the other end of the first resistor, one end of the second resistor and one end of the first capacitor are connected to the base of the first triode, the other end of the first capacitor is connected to the other end of the second resistor, and the connection end of the first capacitor is the control end of the first electronic switch, and the collector of the first triode is the negative electrode of the first electronic switch; the second electronic switch comprises a second triode, a third resistor, a fourth resistor and a second capacitor, the second triode is a PNP type triode, one end of the third resistor is connected with an emitting electrode of the second triode, a connecting end of the third resistor is the anode of the second electronic switch, the other end of the third resistor is connected with one end of the fourth resistor, one end of the second capacitor is connected with a base electrode of the second triode, the other end of the fourth resistor is connected with the other end of the second capacitor, a connecting end of the fourth resistor is the control end of the second electronic switch, and a collector of the second triode is the cathode of the second electronic switch.
3. The LED filament lamp circuit capable of remotely controlling dimming according to claim 1, wherein the first constant current circuit and the second constant current circuit are implemented by using a first integrated circuit chip with the model number of SM2123E and a peripheral circuit thereof, the peripheral circuit comprises a fifth resistor, a sixth resistor, a seventh resistor and an eighth resistor, the pin 6 of the first integrated circuit chip is the output end of the first constant current circuit, the pin 5 of the first integrated circuit chip is the output end of the second constant current circuit, the pin 1 of the first integrated circuit chip is connected with one end of the fifth resistor, the connection end of the pin 1 of the first integrated circuit chip is the control end of the first constant current circuit, the pin 3 of the first integrated circuit chip is connected with one end of the sixth resistor, the connection end of the pin 3 of the first integrated circuit chip is the control end of the second constant current circuit, the 2 nd pin of the first integrated circuit chip is connected with one end of the seventh resistor, the 4 th pin of the first integrated circuit chip is connected with one end of the eighth resistor, the bottom electrode of the first integrated circuit chip, the other end of the fifth resistor and the other end of the seventh resistor are connected, the connecting end of the bottom electrode of the first integrated circuit chip and the other end of the fifth resistor are connected, the connecting end of the bottom electrode of the first integrated circuit chip and the other end of the sixth resistor are connected, the connecting end of the bottom electrode of the sixth resistor and the other end of the eighth resistor are connected, the connecting end of the bottom electrode of the first integrated circuit chip and the other end of the eighth resistor are connected, the connecting end of the seventh resistor is connected with the grounding end of the second constant current circuit, and the 8 th pin of the first integrated circuit chip is used as the power supply input end of the first constant current circuit.
4. The circuit according to claim 1, wherein the voltage converting circuit comprises a second ic chip with model number SM7035, a ninth resistor, a tenth resistor, an eleventh resistor, a third capacitor, a fourth capacitor, a fifth capacitor, a sixth capacitor, a first diode and a first inductor, the fifth capacitor is an electrolytic capacitor, the first diode is a high frequency rectifier diode, the 5 th pin of the second ic chip is an input terminal of the voltage converting circuit, the 1 st pin of the second ic chip is connected to one end of the third capacitor, the 3 rd pin of the second ic chip, one end of the ninth resistor and one end of the tenth resistor are connected, the 2 nd pin of the second ic chip, the other end of the third capacitor, a first resistor, a second resistor, a third resistor, a fourth resistor, a fifth capacitor, a sixth capacitor, a first diode and a first inductor, the fifth capacitor is an electrolytic capacitor, the first diode is a high frequency rectifier diode, the 5 th pin of the second ic chip is an input terminal of the voltage converting circuit, the 1 st pin of the, The other end of the ninth resistor, the one end of the fourth resistor, the one end of the first inductor and the negative electrode of the first diode are connected, the other end of the tenth resistor, the one end of the eleventh resistor, the other end of the fourth capacitor, the positive electrode of the fifth capacitor and the one end of the sixth capacitor are connected with the other end of the first inductor, the connection end of the tenth resistor, the one end of the eleventh resistor, the connection end of the sixth capacitor and the other end of the first inductor are connected, the output end of the voltage conversion circuit is connected, the positive electrode of the first diode, the other end of the eleventh resistor, the negative electrode of the fifth capacitor and the other end of the sixth capacitor are connected, and the connection end of the first diode, the other end of the eleventh resistor, the negative electrode of the fifth capacitor and the other.
5. The circuit of claim 1, wherein the LED lighting circuit comprises n LED lighting modules, n is an integer greater than or equal to 1, each of the LED lighting modules comprises a first LED lighting module and a second LED lighting module, each of the LED lighting modules comprises a high color temperature and a low color temperature, the first LED lighting module and the second LED lighting module respectively have an anode and a cathode, the first LED lighting module and the second LED lighting module are both in unidirectional conduction from the anode to the cathode, the anode of the first LED lighting module and the cathode of the second LED lighting module are connected and the connection end thereof is the first connection end of the LED lighting module, the cathode of the first LED lighting module and the anode of the second LED lighting module are connected and the connection end thereof is the LED lighting module When n is equal to or greater than 2, the first connecting end of the 1 st LED light-emitting component is the first connecting end of the LED light-emitting circuit, the second connecting end of the J th LED light-emitting component is connected with the first connecting end of the j +1 th LED light-emitting component, and the second connecting end of the n th LED light-emitting component is the second connecting end of the LED light-emitting circuit, the first LED light-emitting module of the LED light-emitting component forms one path of LED light-emitting unit of the LED light-emitting circuit package, the second LED light-emitting module of the LED light-emitting component forms the other path of LED light-emitting unit of the LED light-emitting circuit package, j is 1, 2, …, n-1, n the first LED light-emitting module of the LED light-emitting component forms one path of LED light-emitting unit of the LED light-emitting circuit, and n the second LED light-emitting module of the LED light-emitting component forms the other path of LED light-emitting unit of the LED light-emitting circuit.
6. The circuit of claim 1, wherein the rectifying and filtering circuit comprises a full-bridge rectifying bridge and a seventh capacitor, the seventh capacitor is an electrolytic capacitor, the 1 st pin of the full-bridge rectifying bridge is the live wire input terminal of the rectifying and filtering circuit, the 3 rd pin of the full-bridge rectifying bridge is the zero line input terminal of the rectifying and filtering circuit, the 2 nd pin of the full-bridge rectifying bridge and the anode of the seventh capacitor are connected and the connecting terminal thereof is the output terminal of the rectifying and filtering circuit, the 4 th pin of the full-bridge rectifying bridge and the cathode of the seventh capacitor are connected and the connecting terminal thereof is the grounding terminal of the rectifying and filtering circuit.
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| CN110996454A (en) * | 2019-12-31 | 2020-04-10 | 珠海雷特科技股份有限公司 | Complementary PWM dimming method |
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| CN207399569U (en) * | 2017-11-07 | 2018-05-22 | 厦门市义圆源科技有限公司 | A kind of LED light modulations toning circuit |
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Address after: 322009 No. 901, Longqi Road, Suxi Town, Yiwu City, Jinhua City, Zhejiang Province Patentee after: Yiwu Mulinsen Intelligent Lighting Co.,Ltd. Country or region after: China Address before: 322009 No. 901, Longqi Road, Suxi Town, Yiwu City, Jinhua City, Zhejiang Province Patentee before: Harmony Mingxin (Yiwu) Photoelectric Technology Co.,Ltd. Country or region before: China |
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