WO2015196894A1 - Circuit de commande de chaîne de lampes à led à modes multiples et chaîne de lampes à led - Google Patents

Circuit de commande de chaîne de lampes à led à modes multiples et chaîne de lampes à led Download PDF

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Publication number
WO2015196894A1
WO2015196894A1 PCT/CN2015/080283 CN2015080283W WO2015196894A1 WO 2015196894 A1 WO2015196894 A1 WO 2015196894A1 CN 2015080283 W CN2015080283 W CN 2015080283W WO 2015196894 A1 WO2015196894 A1 WO 2015196894A1
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WIPO (PCT)
Prior art keywords
resistor
control circuit
diode
led
mode
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Application number
PCT/CN2015/080283
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English (en)
Chinese (zh)
Inventor
曾仲铨
Original Assignee
深圳彩芯智科技有限公司
曾仲铨
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Application filed by 深圳彩芯智科技有限公司, 曾仲铨 filed Critical 深圳彩芯智科技有限公司
Publication of WO2015196894A1 publication Critical patent/WO2015196894A1/fr

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Classifications

    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B47/00—Circuit arrangements for operating light sources in general, i.e. where the type of light source is not relevant
    • H05B47/10—Controlling the light source
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B47/00—Circuit arrangements for operating light sources in general, i.e. where the type of light source is not relevant
    • H05B47/10—Controlling the light source
    • H05B47/17—Operational modes, e.g. switching from manual to automatic mode or prohibiting specific operations

Definitions

  • the utility model belongs to the field of LED drive control, and particularly relates to a multi-mode LED light string control circuit and an LED light string.
  • LED light strings are widely used in the fields of architecture, landscape, environment, bridges, stadiums, and municipal lighting in airports.
  • the flashing driver chip forms a string or a light grid in series or in parallel.
  • the flashing scheme is mostly designed with two lines of power supply positive and negative power supply.
  • the flash drive chip randomly drives the respective LEDs to flash.
  • the purpose of an embodiment of the present invention is to provide a multi-mode LED string control circuit, which aims to solve the problem that the current LED string can only achieve monochromatic flashing or random color flickering, and the flickering method is monotonous.
  • a multi-mode LED light string control circuit includes a sequence control circuit board and a drive control circuit board, and the sequence control circuit The board includes:
  • a clamp voltage dividing circuit an input end of the clamp voltage dividing circuit is connected to an input interface of the sequence control circuit board and a first DC power voltage;
  • the first single chip, the power end of the first single chip is connected to the first output end of the clamp voltage dividing circuit, the ground end of the first single chip and the second output of the clamp voltage dividing circuit End connection
  • a blinking mode control circuit an input end of the blinking mode control circuit is connected to an input end of the clamp voltage dividing circuit, a control end of the blinking mode control circuit and a first output end of the first single chip microcomputer
  • the first output end of the flashing mode control circuit is a power positive interface of the sequencing control circuit board
  • the second output end of the flashing mode control circuit is a power supply negative connection of the sequential control circuit board.
  • the driving control circuit board includes M LED driving circuit groups, and each of the LED driving circuit groups includes N parallel LED driving modules;
  • N power supply terminals of the LED driving module are connected to each other and are power terminals of the LED driving circuit group, and the ground terminals of the N LED driving modules are connected to each other and are the LED driving circuit group Ground terminal
  • the power supply end of the first LED driving circuit group is connected to the positive power interface of the power supply of the driving control circuit board and the positive power interface of the power supply circuit of the sequencing control circuit board, and the mth LED driving circuit group
  • the power supply end is connected to the ground end of the m-1th LED driving circuit group, and the ground end of the Mth LED driving circuit group is a power negative interface of the driving control circuit board and the sequencing control circuit board
  • the power supply negative interface is connected;
  • the M and N are both natural numbers greater than 2, and the m is a natural number greater than or equal to 2 and less than or equal to M.
  • the multi-mode LED string control circuit further includes:
  • the input end of the power conversion module is connected to the second alternating current power supply voltage, the output end of the power conversion module and the input end of the clamp voltage dividing circuit connection.
  • the frequency drift of the first single chip microcomputer is less than ⁇ 3%.
  • the clamp voltage dividing circuit comprises:
  • resistor Rl resistor R2, resistor R3, resistor R4, capacitor Cl, capacitor C3 and diode Dl;
  • one end of the resistor R1 is connected to an input end of the clamp voltage dividing circuit and one end of the capacitor C1, and the other end of the resistor R1 is grounded at the same end as the other end of the capacitor C1.
  • One end of the resistor R1 is also connected to the cathode of the diode D1 and one end of the resistor R4, and the other end of the resistor R4 is the first output end of the clamp voltage dividing circuit and one end of the capacitor C3.
  • a second output end of the clamp voltage dividing circuit is connected to the anode of the diode D1, and an anode of the diode D1 is also connected to the resistor R2 and one end of the resistor R3, the resistor R2 and The other end of the resistor R3 is grounded at the same time.
  • the blinking mode control circuit includes:
  • one end of the resistor R5 is connected to the input end of the flicker mode control circuit and the input end of the first switch, and the other end of the resistor R5 is the control end of the flicker mode control circuit
  • the control end of the first bypass tube is connected, the output end of the first bypass tube is connected to the first output end of the flashing mode control circuit and one end of the resistor R7, and the other end of the resistor R7
  • a second output of the blink mode control circuit is grounded through the resistor R6.
  • the first bypass transistor is a P-type MOS transistor
  • the drain of the P-type MOS transistor is an input end of the first bypass transistor
  • the source of the P-type MOS transistor is extremely An output end of the first bypass transistor
  • a gate of the P-type MOS transistor is a control end of the first bypass transistor.
  • the LED driving module includes:
  • a red LED light emitting chip a green LED light emitting chip, a blue LED light emitting chip, a second single chip and a diode D2;
  • the red LED light emitting chip, the green LED light emitting chip, the power supply end of the blue LED light emitting chip is the same as the power end of the LED driving module and the power end of the second single chip
  • the output terminals of the red LED light emitting chip, the green LED light emitting chip, and the blue LED light emitting chip are respectively connected to a plurality of input ends of the second single chip, and the power end of the second single chip is further connected to the diode
  • a cathode of D2 is connected, and an anode of the diode D2 is connected to a ground end of the LED driving module and a ground end of the second single chip microcomputer.
  • the power conversion module comprises:
  • the DC negative output terminal of the first rectifier bridge stack is grounded, and the DC positive output terminal of the first rectifier bridge stack is also connected to one end of the resistor R21.
  • the other end of the resistor R21 is connected to the power terminal of the power management chip and one end of the resistor R22.
  • the power terminal of the power management chip is also grounded through the capacitor C22, and the power management chip is The ground end is grounded, the other end of the resistor R22 is connected to the cathode of the diode D4, the anode of the diode D4 is connected to the same end of the second coil of the transformer, and the different name end of the second coil of the transformer is grounded.
  • One end of the resistor R21 is also connected to the cathode of the diode D5 and the same end of the first coil of the transformer, the anode of the diode D5 is opposite to the opposite end of the first coil of the transformer and
  • the input end of the fourth switch is connected, the output end of the fourth switch is grounded through the resistor R23, and the control end of the fourth switch and the control end of the power management chip Connecting, the selection end of the power management chip is connected to the output end of the fourth switch, the feedback end of the power management chip is connected to the optocoupler receiving input, and the optocoupler receiving output is grounded,
  • An optocoupler input end is connected to one end of the resistor R24, and the other end of the resistor R24 is an output end of the power conversion module connected to a cathode of the diode D6, an anode of the diode D6 and the transformer The same name end of the three coils is connected, the cathode of the diode D6 is also grounded
  • the cathode of the controllable diode D7 is connected, the other end of the capacitor C24 is connected to one end of the resistor R25, and the other end of the resistor R25 is connected to one end of the resistor R26 and one end of the resistor R27.
  • the other end of the resistor R26 is connected to the other end of the resistor R24, and the other end of the resistor R27 is grounded to the anode of the controllable diode D7, and the controllable diode D7 is controlled. Terminal end of the resistor R27 is connected
  • the multi-mode LED string control circuit further includes a first crystal oscillator
  • One end of the first crystal oscillator is connected to the second output end of the first single chip, and the other end of the first crystal oscillator is grounded together with the third output end of the first single chip microcomputer.
  • the second AC power supply voltage is AC mains
  • the power conversion module includes: [0032] a varistor RV, a capacitor C1, an inductor L4, a fuse, and a second rectifier bridge stack;
  • one end of the fuse is connected to an input end of the power conversion module and the live line of the mains, and the other end of the fuse is connected to an AC input end of the second rectifier bridge stack, Second rectifier bridge
  • the other input terminal of the stack is connected to the neutral line of the mains, and the DC positive output of the second rectifier bridge is connected to one end of the inductor L4.
  • the other end of the inductor L4 is that the output end of the power conversion module is grounded through the capacitor C11, the DC negative output end of the second rectifier bridge stack is grounded, and one end of the varistor RV and the fuse are One end is connected, and the other end of the varistor RV is connected to the neutral line of the mains;
  • the clamp voltage dividing circuit includes:
  • resistor Rl l resistor R12, resistor R13, resistor R14, capacitor C12 and diode D3;
  • One end of the resistor R11 is an input end of the clamp voltage dividing circuit, the other end of the resistor R11 is connected to one end of the resistor R12, and the other end of the resistor R12 is opposite to the resistor R13.
  • One end of the resistor R13 is connected to the cathode of the diode D3 and one end of the resistor R14, and the other end of the resistor R14 is the first output end of the clamp voltage dividing circuit.
  • One end of the capacitor C12 is connected, and the second output end of the clamp voltage dividing circuit of the anode of the diode D3 is grounded at the same time as the other end of the capacitor C12;
  • the blinking mode control circuit includes:
  • one end of the resistor R16 is connected to the input end of the flicker mode control circuit and the input end of the second switch, and the other end of the resistor R16 is the same as the end of the resistor R17
  • the control terminal of the second switch is connected, the other end of the resistor R17 is connected to the input end of the third switch, and the control end of the third switch is controlled by the blink mode control circuit.
  • the end of the resistor R15 is connected to one end of the resistor R15, the other end of the resistor R15 and the output end of the third bypass tube are connected to the same ground, and the output end of the second bypass transistor is the flashing mode control circuit
  • the first output end is connected to one end of the resistor R18, and the other end of the resistor R18 is grounded to the second output end of the flicker mode control circuit;
  • the multi-mode LED string control circuit further includes a first crystal oscillator
  • One end of the first crystal oscillator is connected to the second output end of the first single chip microcomputer, and the other end of the first crystal oscillator is grounded together with the third output end of the first single chip microcomputer.
  • Another object of an embodiment of the present invention is to provide an LED light string using the multi-mode LED string control circuit described above.
  • the power supply of the LED light string is powered by the high voltage without changing the structure of the two power lines of the light string, and the monochromatic or multi-color light string is sequentially realized in the flash mode by using the operating frequency change of the single chip microcomputer.
  • the flow flashing mode and the replacement between the random flashing modes, and the automatic demonstration function of the flashing of the string changing by the fixed resetting greatly enhance the vividness and diversity of the flashing of the LED string, thereby satisfying the LED lighting string for the lighting market. Diversified needs for various modes of flashing.
  • FIG. 1 is a structural diagram of a multi-mode LED string control circuit connected to a DC voltage according to an embodiment of the present invention
  • FIG. 2 is a structural diagram of a sequencing control circuit board in a multi-mode LED string control circuit connected to an AC voltage according to an embodiment of the present invention
  • FIG. 3 is a circuit diagram showing an example circuit of a sequence control circuit board in a multi-mode LED string control circuit connected to a DC voltage according to an embodiment of the present invention
  • FIG. 4 is a schematic circuit diagram showing an example of a driving control circuit board in a multi-mode LED string control circuit according to an embodiment of the present invention
  • FIG. 5 is a circuit diagram showing an example circuit of a sequence control circuit board in an isolation transformer type multi-mode LED lamp string control circuit connected to an AC voltage according to an embodiment of the present invention
  • FIG. 6 is a circuit diagram showing an example circuit of a sequencing control circuit board in a high-voltage non-isolated multi-mode LED string control circuit for a commercial power supply according to an embodiment of the present invention.
  • the power supply of the LED light string is powered by the high voltage without changing the structure of the two power lines of the light string, and the monochromatic or multi-color light string is sequentially realized in the flash mode by using the operating frequency change of the single chip microcomputer.
  • Flow flashing mode and replacement between random flashing modes, and flashing of the string by fixed reset The automatic presentation feature enhances the vividness of the string.
  • FIG. 1 shows the structure of a multi-mode LED string control circuit for receiving a DC voltage according to an embodiment of the present invention. For the convenience of description, only parts related to the present invention are shown.
  • the multi-mode LED string control circuit can be applied to any LED string, including the sequencing control circuit board 1 and the drive control circuit board 2;
  • the sequence control circuit board 1 includes:
  • the clamp voltage dividing circuit 11, the input end of the clamp voltage dividing circuit 11 is an input interface of the sequence control circuit board 1 and is connected to the first DC power voltage;
  • the first MCU MCU1, the power terminal VDD of the first MCU1 is connected to the first output end of the clamp voltage dividing circuit 11, the ground terminal GND of the first MCU1 and the second output of the clamp voltage dividing circuit 11 End connection
  • a flicker mode control circuit 12 the input end of the flicker mode control circuit 12 is connected to the input end of the clamp voltage dividing circuit 11, and the control end of the flicker mode control circuit 12 is connected to the first output end 101 of the first single chip MCU1.
  • the first output end of the flicker mode control circuit 12 is the power supply positive interface PV + of the sequence control circuit board 1, and the second output end of the flicker mode control circuit 12 is the power supply negative interface PV- of the sequence control circuit board 1;
  • the drive control circuit board 2 includes M LED drive circuit groups, and each of the LED drive circuit groups 21 includes N parallel LED drive modules 201;
  • the power terminals of the N LED driving modules 201 are connected to each other and are the power terminals of the LED driving circuit group 21, and the grounding ends of the N LED driving modules are connected to each other and are the grounding ends of the LED driving circuit group 21;
  • the power supply end of the first LED driving circuit group 21 is the power positive terminal PV+ of the driving control circuit board 2 and the power positive terminal PV+ of the sequencing control circuit board 1, and the power supply end of the mth LED driving circuit group 21.
  • the grounding end of the Mth LED driving circuit group 21 is the power supply negative interface PV- of the driving control circuit board 2 and the negative power interface of the power supply circuit board 1 PV-connection;
  • M and N are both natural numbers greater than 2
  • m is a natural number greater than or equal to 2 and less than or equal to M.
  • the first DC power supply voltage is a higher DC voltage greater than 24V, such as a commonly used 24V, 36V DC power.
  • the LED driving module 201 includes a second single-chip microcomputer MCU2 with a frequency drift of less than ⁇ 3%, and preferably uses a single-chip microcomputer with a frequency drift of ⁇ 1%.
  • the sequence control circuit board 1 can be powered by 24V DC, and the voltage of the power supply terminal of the first single chip MCU1 is clamped to about 5V by the clamp voltage dividing circuit 11, and the first The potential of the grounding terminal GND of the MCU1 of the single chip microcomputer is increased, thereby controlling the first output end of the flicker mode control circuit 12 to output two 24V voltages for powering the LED string, and controlling the second output end of the flicker mode control circuit 12 to output a voltage close to the ground potential.
  • the flicker mode control circuit 12 can output a reset signal of a low level, so that the LED driving module 201 can be reset by powering off, and the operation after the resetting is started, due to the operation of the single chip microcomputer in the LED driving module 201.
  • the frequency is relatively consistent, so several LED flashes have a synchronous effect, and the LED light string is in a flash mode, after which the operating frequency of the single chip microcomputer in the LED driving module 201 starts to make a difference, and the single chip microcomputer is designed to be flashing.
  • the flash method, the difference of the matching frequency causes the flashing method and the color to jump off the flashing method of the same color, thereby generating the effect of the flashing method.
  • the frequency of the single chip selected by the embodiment of the present invention is small, it is quite long.
  • the difference between the frequency flicker between the LEDs in a period of time is not more than 0.3 seconds, so the LED string can show the flow flashing mode.
  • This inch MCU1 microcontroller may control the first output signal of the control circuit 12 controls a blinking pattern and then outputs a reset signal of a low level, the LED driving module 201 overall reset, re-flash mode together. Repeatedly, the LED string can produce an automatic display effect.
  • the first single chip MCU1 calculates the length of the reset signal generated according to the frequency drift in the LED driving module 201 and the user's demand for the random flicker mode to obtain the best work.
  • the diurnal range, and thus the dither mode, the flow flicker mode, and the random flicker mode are controlled, and controlling the output signal of the single-chip microcomputer is a common technical means by those skilled in the art, and details are not described herein again.
  • the power terminal and the ground terminal of the plurality of LED driving modules 201 are respectively connected together as the power terminal and the ground terminal of the LED driving circuit group 21 to form a LED driving circuit group with a parallel structure.
  • the power supply end and the ground end of the plurality of LED driving circuit groups 21 are sequentially connected in series to form a string. Joint structure.
  • the first group of LED driving circuit groups receives the 24V DC voltage output by the sequence control circuit board 1, and the driving voltage in the LED driving module 201 is slightly larger than the driving voltage of the LED driving module 201, for example, A voltage of about 5V can be reserved for the chip operation in the LED driving module 201, and the 19V voltage is transmitted to the next-stage LED driving circuit group 21 in series through the ground terminal, and the next-stage LED driving circuit group 21 is retained by the clamp by about 5V. After the operating voltage, the 14V voltage is transmitted to the LED driving circuit group 21 of the next stage until the last group of LED driving circuit group 21, the power supply voltage does not exceed 5V, and is no longer connected in series. Therefore, it can be known that if the input power is The 24V LED drive circuit group 21 can be connected in series, and the number of parallel connection of the LED drive module 201 is not limited, and can be set according to user requirements.
  • a current limiting resistor should be connected in series between the two sets of LED driving circuit groups 2 to ensure that the chips in the LED driving module 201 are not burned.
  • the embodiment of the present invention can realize the control of the single flash mode, the flow flick mode and the random flicker mode of the monochrome LED, and can also implement various flicker mode control of the color LED.
  • the power supply of the LED light string is powered by the high voltage without changing the structure of the two power lines of the light string, and the monochromatic or multi-color light string is sequentially realized in the flash mode by using the operating frequency change of the single chip microcomputer.
  • the flow flashing mode and the replacement between the random flashing modes, and the automatic demonstration function of the flashing of the string changing by the fixed resetting greatly enhance the vividness and diversity of the flashing of the LED string, thereby satisfying the LED lighting string for the lighting market. Diversified needs for various modes of flashing.
  • FIG. 2 shows a structure of a sequence control circuit board in a multi-mode LED string control circuit connected to an AC voltage according to an embodiment of the present invention. For convenience of description, only parts related to the present invention are shown. .
  • the multi-mode LED string control circuit can also directly connect with an alternating current between 85V and 265V. Therefore, a power conversion module should be added to the sequence control circuit board 1.
  • the input end of the power conversion module 13 is connected to the second AC power supply voltage, and the output end of the power conversion module 13 is connected to the input end of the clamp voltage dividing circuit 11 for converting the alternating current into direct current for supplying power to the subsequent circuit.
  • the embodiments of the present invention can be applied not only to a higher DC power, but also to a wide range of AC voltages to ensure that the string drive is not limited by the power source.
  • FIG. 3 shows an example circuit structure of a sequence control circuit board in a multi-mode LED string control circuit connected to a DC voltage according to an embodiment of the present invention. For the convenience of description, only the related to the present invention is shown. part.
  • the clamp voltage dividing circuit 11 includes:
  • One end of the resistor R1 is connected to the input end of the clamp voltage dividing circuit 11 and one end of the capacitor C1, and the other end of the resistor R1 is grounded to the other end of the capacitor C1, and one end of the resistor R1 is also the same as the diode D1.
  • the cathode is connected to one end of the resistor R4, the other end of the resistor R4 is connected to the first output end of the clamp voltage dividing circuit 11 and connected to one end of the capacitor C3, and the other end of the capacitor C3 is the second output end of the clamp voltage dividing circuit 11 and
  • the anode of the diode D1 is connected, the anode of the diode D1 is also connected to one end of the resistor R2 and the resistor R3, and the other end of the resistor R2 and the resistor R3 are grounded.
  • the blink mode control circuit 12 includes:
  • One end of the resistor R5 is connected to the input end of the first switch transistor Q1, and the other end of the resistor R5 is the control end of the blink mode control circuit 12 and the first switch Q1.
  • the control terminal is connected.
  • the output end of the first switch transistor Q1 is connected to the first output end of the blink mode control circuit 12 and connected to one end of the resistor R7, and the other end of the resistor R7 is the second output end of the blink mode control circuit 12 through the resistor R6.
  • the first bypass tube Q1 can be implemented by using a MOS tube or a thyristor.
  • the drain of the P-type MOS tube is the first bypass tube Q1.
  • the input end, the source of the P-type MOS tube is extremely the output end of the first ⁇ Guan Q1, and the gate of the P-type MOS tube is the control end of the first ⁇ Guan Q1.
  • the input terminal of the clamp voltage dividing circuit 11 is 24V DC power supply
  • the power supply terminal voltage of the first single chip MCU1 is clamped at 5.1V through the Zener diode D1, and then through the resistor R2 and
  • the voltage drop of the resistor R 3 increases the potential of the grounding terminal GND of the first single chip MCU1, so that the output terminal of the first MCU M1 directly outputs a signal to control the conduction and the closing of the first switching transistor Q1, thereby generating the power supply and disconnection of the string.
  • the power supply of the LED light string is powered by the high voltage without changing the structure of the two power lines of the light string, and the monochromatic or multi-color light string is sequentially realized in the flash mode by using the operating frequency change of the single chip microcomputer.
  • Flow The flashing mode and the random flashing mode are replaced, and the lamp string changing flashing automatic demonstration function is realized by the fixed resetting, which greatly enhances the vividness and diversity of the LED string flashing, thereby satisfying the lighting lighting market for the LED string. Diversified needs for various modes of flashing.
  • FIG. 4 shows an example circuit structure of a driving control circuit board in a multi-mode LED string control circuit provided by an embodiment of the present invention. For the convenience of description, only parts related to the present invention are shown.
  • the LED driving module 201 includes:
  • red LED light emitting chip LED_R green LED light emitting chip LED_G, blue LED light emitting chip LED_B, second single chip MCU2 and diode D2;
  • the red LED light emitting chip LED_R, the green LED light emitting chip LED_G, the blue LED light emitting chip LED _8 is connected to the power terminal of the LED driving module 201 and the power terminal VDD of the second single chip MCU2, the red LED light emitting chip The output terminals of the LED_R, the green LED light-emitting chip LED_G, and the blue LED light-emitting chip LED_B are respectively connected to the plurality of input terminals 101-103 of the second single-chip MCU2, and the power supply terminal VDD of the second single-chip MCU2 is also connected to the cathode of the diode D2, the diode The anode of D2 is connected to the ground end of the LED driving module 201 and the ground GND of the second single chip MCU2.
  • the LED driving module 201 can be disposed on the driving control circuit board 2 in the form of a PCB, or can be integrated into the LED lamp.
  • the LED driving modules are first connected in parallel to form a group of light strings.
  • the number of parallel connections is determined according to the number of LEDs required by the light string, and then multiple sets of light strings (LED driving circuit groups) are connected in series to achieve a suitable order. Control the output voltage of the circuit board 1 to make the light string work smoothly. Since multiple modules are connected in parallel, the parallel part can be manufactured by machine, which reduces manual assembly, reduces work cost, and accelerates production efficiency. .
  • FIG. 5 shows an example circuit structure of a step-by-step control circuit board in an isolation transformer type multi-mode LED light string control circuit connected to an AC voltage according to an embodiment of the present invention. For convenience of explanation, only the present embodiment is shown. The relevant part of the utility model.
  • the power conversion module 13 may include:
  • the two AC input ends of the first rectifier bridge stack UR1 are input terminals of the power conversion module 13, and the DC positive output terminal of the first rectifier bridge stack UR1 is grounded through the capacitor C21, and the DC negative output terminal of the first rectifier bridge stack UR1 Grounding, the DC positive output of the first rectifier bridge stack UR1 is also connected to one end of the resistor R21, and the other end of the resistor R21 is connected to the power supply terminal VDD of the power management chip IC3 and one end of the resistor R22, and the power supply chip IC3 is powered.
  • the terminal VDD is also grounded through the capacitor C22, the ground terminal GND of the power management chip IC3 is grounded, the other end of the resistor R22 is connected to the cathode of the diode D4, the anode of the diode D4 is connected to the same name end of the second coil L2 of the transformer, and the second coil L2 of the transformer The opposite end of the resistor is grounded.
  • One end of the resistor R21 is also connected to the cathode of the diode D5 and the same name of the first coil L1 of the transformer.
  • the anode of the diode D5 is the same as the opposite end of the transformer first coil L1 and the fourth switch.
  • the input end of the tube Q4 is connected, the output end of the fourth switch Q4 is grounded through the resistor R23, and the control end of the fourth switch Q4 is connected with the control end of the power management chip IC3.
  • the selection terminal CS of the power management chip IC3 is connected to the output end of the fourth switch Q4, the feedback end FB of the power management chip IC3 is connected to the receiving input end of the optocoupler U1, the optocoupler U1 receives the output end grounded, and the optocoupler U1 transmits
  • the input end is connected to one end of the resistor R24, and the other end of the resistor R24 is connected to the cathode of the diode D6 at the output end of the power conversion module 13, the anode of the diode D6 is connected to the same end of the third coil L3 of the transformer, and the cathode of the diode D6 is also passed.
  • the capacitor C23 is grounded, and the different end of the third coil L3 of the transformer is grounded.
  • the output end of the optocoupler U1 is connected to the cathode of the capacitor C24 and the cathode of the controlled rectifier device D7, and the other end of the capacitor C24 is connected to one end of the resistor R25.
  • the other end of the resistor R25 is connected to one end of the resistor R26 and one end of the resistor R27, the other end of the resistor R26 is connected to the other end of the resistor R24, and the other end of the resistor R27 is grounded to the anode of the controlled rectifying device D7 .
  • the control end of the controlled rectifier device D7 is connected to one end of the resistor R27;
  • first rectifier bridge stack UR1 can also be replaced by four M7 type high voltage rectifier tubes, or replaced by integrated circuit chips with the same function.
  • the fourth bypass transistor Q4 can be implemented by an N-type MOS transistor or a corresponding thyristor, the drain of the N-type MOS transistor is the input end of the fourth bypass transistor Q4, and the source of the N-type MOS transistor is extremely fourth. At the output of the tube Q4, the gate of the N-type MOS transistor is the control terminal of the fourth bypass transistor Q4.
  • the controlled rectification device D7 can be implemented by using a 431 type voltage stabilization chip.
  • the power conversion module 13 is a reverse-ride AC-DC circuit, in which the resistor R26 and the resistor R27 divide the voltage at the output terminal, and feedback back to the power management chip IC3 by using the optocoupler U1.
  • the terminal FB senses the voltage of the fourth switch Q 4 flowing through the resistor R23 through the selection terminal CS of the power management chip IC3, and compares the voltages outputted by the secondary side of the circuit through the two signals.
  • the value is: D7-[(R26/R27)+1], where D7 is the operating voltage of the controlled rectifier device D7 (such as the 431 regulator chip), and R26 and R27 are the resistance values of the resistor R26 and the resistor R27, for example,
  • the 431 type regulator chip maintains a balanced voltage of about 2.5V after power supply. If the output voltage of the secondary side is designed to be 24V, the voltage divider value of the resistor R26 and the resistor R27 must be transmitted back via the 431 regulator chip. The voltage is fed back to the power management chip IC3 so that the power conversion module 13 outputs a DC voltage of 24V to supply power to the drive control circuit board 2.
  • the multi-mode LED string control circuit may further include a first crystal oscillator J1;
  • One end of the first crystal oscillator J1 is connected to the second output terminal 102 of the first single chip MCU1, and the other end of the first crystal oscillator J1 is grounded together with the third output 103 of the first single chip MCU1.
  • the light strings controlled by the plurality of sets of the first single-chip MCU1 can be combined together, because the first crystal oscillator J1 makes the working frequency of the first MCU1 more accurate, for example, an external 12MHz.
  • the crystal oscillator can make multiple sets of light strings work for one whole night (12 hours). The difference between resets is less than 1 second, so that the sequence and effect of all the strings can be consistent without the flash sequence. pickle.
  • the high-voltage alternating current is converted into direct current by means of transformer isolation, and then the LE D light string is supplied with power, and the monochromatic or multi-color light string is sequentially realized in a flash mode and flow by using the operating frequency change of the single chip microcomputer.
  • the flashing mode and the replacement between the random flashing modes, and the automatic demonstration function of the flashing of the string changing by the fixed resetting greatly enhance the vividness and diversity of the flashing of the LED string, thereby satisfying the lighting market for the LED string The diversified needs of the various modes of flashing.
  • FIG. 6 shows an example circuit structure of a sequencing control circuit board in a high-voltage non-isolated multi-mode LED light string control circuit of a commercial power supply provided by an embodiment of the present invention.
  • a sequencing control circuit board in a high-voltage non-isolated multi-mode LED light string control circuit of a commercial power supply provided by an embodiment of the present invention.
  • the power conversion module 13 may further include:
  • One end of the fuse F1 is connected to an input terminal of the power conversion module 13 and the live line of the mains, the other end of the fuse F1 is connected to an AC input end of the second rectifier bridge stack UR2, and the second rectifier bridge stack UR2 is another The other input end of the power conversion module 13 is connected to the neutral line of the mains, the DC positive output of the second rectifier bridge UR2 is connected to one end of the inductor L4, and the other end of the inductor L4 is the power conversion module 13 The output end is grounded through a capacitor C11, and the DC negative output end of the second rectifier bridge stack UR2 is grounded;
  • the second rectifier bridge stack UR2 can also be replaced by four M7 type high voltage rectifier tubes or with the same integrated circuit chip.
  • the power conversion module 13 may further include a varistor RV, one end of the varistor RV and the other end of the fuse F1 (ie, one of the second rectifier bridge stack UR2) Connected to the AC input), the other end of the varistor RV is connected to the neutral line of the mains. It is used to prevent lightning strikes when used outdoors. If a lightning strike occurs, the varistor RV will be short-circuited and will be connected to the fuse F1. A loop is formed, which causes the fuse F1 to be blown to form a power supply disconnection to ensure that the string does not have a fire, further enhancing the safety performance of the string.
  • the clamp voltage dividing circuit 11 may include:
  • resistor Rl l resistor R12, resistor R13, resistor R14, capacitor C12 and diode D3;
  • One end of the resistor R11 is an input end of the clamp voltage dividing circuit 11, the other end of the resistor R11 is connected to one end of the resistor R12, the other end of the resistor R12 is connected to one end of the resistor R13, and the other end of the resistor R13 is the same
  • the cathode of the diode D3 is connected to one end of the resistor R14, the other end of the resistor R14 is connected to the first output end of the clamp voltage dividing circuit 11 and one end of the capacitor C12, and the anode of the diode D3 is the clamp voltage dividing circuit 11
  • the second output is grounded at the same time as the other end of the capacitor C12;
  • the blink mode control circuit 12 may include:
  • the multi-mode LED string control circuit may also include a first crystal oscillator J1;
  • the power conversion module 13 is a non-isolated rectification and filtering circuit, and the alternating current is converted into direct current through the second rectifier bridge stack UR2, and then filtered by the inductor L4 and the capacitor C11, and then passed through the resistor Rl l and the resistor R12.
  • the voltage drop of the resistor R13 is low voltage, and the voltage is clamped to about 5.1V through the Zener diode D3, and then the current is limited by the resistor R14, and the capacitor C12 is filtered to supply power to the first MCU1, and the first MCU1 is powered on.
  • the first output terminal 101 - directly outputs a high level, so that the third switch transistor Q3 is opened, and a current is generated in the resistor R16 and the resistor R17 and divided, so that the gate-source voltage V ⁇ of the second bypass transistor Q2
  • the negative voltage is turned on, and the voltage filtered by the inductor L4 and the capacitor C 11 is output to the positive power interface PV+ of the power supply control circuit board 1, and then the light string is supplied, and each driving module on the light string is approached.
  • the 4.8V ⁇ 5V crossover voltage it is necessary to increase the number of series connections so as to approach the high voltage value of the power supply positive interface PV+.
  • the first output terminal 101 will be briefly When the low level is turned off, the third switching transistor Q3 and the second switching transistor Q2 are temporarily turned off, thereby causing the second single chip MCU2 in the LED driving module 201 to be reset due to power failure, so that the light string is more serious in frequency. In this case, the effect of the flashing can be restarted due to the reset, and the resistor R18 can make the residual charge on the string can be consumed close to 0V in a short power-off period, thereby ensuring the LED driving module 201.
  • the second microcontroller can be reset.
  • the second bypass transistor Q2 can be implemented by a P-type MOS transistor or a corresponding thyristor, and the source of the P-type MOS transistor is the input end of the second bypass transistor Q2, P-type The drain of the MOS transistor is the output end of the second bypass transistor Q2, and the gate of the P-type MOS transistor is the control terminal of the second bypass transistor Q2;
  • the third bypass transistor Q3 can be implemented by an N-type MOS transistor or a corresponding thyristor, the drain of the N-type MOS transistor is the input end of the third bypass transistor Q3, and the source of the N-type MOS transistor is extremely third. At the output of the transistor Q3, the gate of the N-type MOS transistor is the control terminal of the third bypass transistor Q3.
  • the embodiment of the present invention converts high-voltage alternating current into direct current by using a high-voltage non-isolated manner, and then supplies power to the LE D light string, and outputs a reset signal through the potential control of the first single-chip microcomputer, and the same in the first
  • the output end of a single-chip microcomputer is externally connected with a crystal oscillator to reduce the difference between the resets of the plurality of sets of light strings, so that the second single-chip microcomputer performs the flash mode in the first stage after the reset, and then replaces the flow according to the frequency drift of the second single-chip microcomputer.
  • the LED light string In the blinking mode, in the second section, the LED light string is gradually changed in brightness, flashing, mixed light, etc., and the light string is increased.
  • the variability of the flash method as the frequency drift of the second single chip is intensified, the light string is replaced by a random blinking mode in the third section, the flickering effect of the multi-color mixed light is realized, the vividness of the light string is increased, and again After the power-off reset, the flash mode is re-entered, and the cycle causes the string to perform a segmentation flashing automatic demonstration function to meet the diversified needs of the lighting market for various modes of LED string.
  • Another object of an embodiment of the present invention is to provide an LED light string using the multi-mode LED string control circuit described above.

Landscapes

  • Circuit Arrangement For Electric Light Sources In General (AREA)

Abstract

La présente invention se rapporte au domaine de la commande d'excitation de LED et concerne un circuit de commande de chaîne de lampes à LED à modes multiples et une chaîne de lampes à LED. Le circuit de commande de chaîne de lampes à LED comprend : une carte de circuit imprimé de commande de séquence temporelle (1) et une carte de circuit imprimé de commande d'excitation (2). La carte de circuit imprimé de commande de séquence temporelle (1) comprend un circuit diviseur de tension à serrage (11), un premier micro-ordinateur monopuce et un circuit de commande de mode clignotant (12). La carte de circuit imprimé de commande d'excitation (2) comprend une pluralité de groupes de circuits d'excitation de LED, chaque groupe de circuits d'excitation de LED (21) comprenant une pluralité de modules d'excitation de LED (201) connectés en parallèle. Sans modifier la structure de deux lignes d'alimentation en énergie électrique de la chaîne de lampes, la chaîne de lampes à LED est alimentée par l'intermédiaire d'une haute tension, et une variation d'une fréquence de fonctionnement du micro-ordinateur monopuce est utilisée pour permettre à la chaîne de lampes à couleur unique ou à couleurs multiples de changer séquentiellement entre un mode clignotant simultané, un mode clignotant à écoulement et un mode clignotant aléatoire, et une fonction de démonstration automatique de clignotement à changement de segment de chaîne de lampe est mise en œuvre par l'intermédiaire d'une remise à l'état initial synchronisée, augmentant sensiblement la vivacité et la diversité du clignotement de la chaîne de lampes à LED.
PCT/CN2015/080283 2014-06-23 2015-05-29 Circuit de commande de chaîne de lampes à led à modes multiples et chaîne de lampes à led WO2015196894A1 (fr)

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CN109899697A (zh) * 2017-12-05 2019-06-18 深圳市星昇科技有限公司 一种电源线通讯的灯串及其控制方法
CN110035574A (zh) * 2018-11-23 2019-07-19 宁波鑫合瑞电子有限公司 基于射频的rgb灯带用控制器及电源插头
CN110519901A (zh) * 2019-09-19 2019-11-29 深圳市紫光照明技术股份有限公司 一种智能灯具
CN111479356A (zh) * 2020-04-28 2020-07-31 厦门强力巨彩光电科技有限公司 一种显示屏的rgb-led灯控制电路
CN113966055A (zh) * 2020-01-17 2022-01-21 新嘉数码电子(深圳)有限公司 一种电力载波控制灯串的方法、电子广告牌及装置

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US9907129B2 (en) * 2016-04-07 2018-02-27 Microchip Technology Incorporated Multiple LED string dimming control
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CN110475417A (zh) * 2019-09-19 2019-11-19 深圳市紫光照明技术股份有限公司 一种智能灯控器
CN112654122A (zh) * 2020-06-03 2021-04-13 西安优势物联网科技有限公司 一种智能助航灯及同步闪烁方法
CN114025450A (zh) * 2021-12-01 2022-02-08 横店集团得邦照明股份有限公司 一种低功率因数降压集成电路并联的led电路及其实现方法
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CN108105629A (zh) * 2017-06-18 2018-06-01 鞍山市祺亚德农业照明科技有限公司 一灯多能的led植物补光灯的控制方法
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CN110035574A (zh) * 2018-11-23 2019-07-19 宁波鑫合瑞电子有限公司 基于射频的rgb灯带用控制器及电源插头
CN110519901A (zh) * 2019-09-19 2019-11-29 深圳市紫光照明技术股份有限公司 一种智能灯具
CN113966055A (zh) * 2020-01-17 2022-01-21 新嘉数码电子(深圳)有限公司 一种电力载波控制灯串的方法、电子广告牌及装置
CN111479356A (zh) * 2020-04-28 2020-07-31 厦门强力巨彩光电科技有限公司 一种显示屏的rgb-led灯控制电路

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