Lamp string controller, LED lamp string and artificial Christmas tree

Abstract

The utility model relates to a light string controller, an LED light string and an artificial Christmas tree. A light string controller comprises a housing which is internally provided with a sealed accommodation space and is provided with openings at two opposite sides; the control circuit board is arranged in the accommodating space and is provided with a power supply end and an output end; the two connecting wires respectively penetrate through the two openings of the shell and are connected to the power supply end and the output end of the control circuit board; the power supply end is used for being connected with a DC power supply through the connecting wire, the output end is used for being connected with a lamp string through the connecting wire, and power supply of the power supply end to the output end is controlled according to high and low level output of the control circuit board. The circuit for controlling the LED lamp string to emit light for the artificial Christmas tree is simple, and the light emitting control operation is simple.

Description

Technical Field

[0001] The utility model relates to the technical field of electronic control, and particularly to a lamp string controller, an LED lamp string and an artificial Christmas tree. Background Art

[0002] In life, people often use Christmas trees for decoration, such as in shopping malls and hotel lobbies. At the same time, in order to enhance the festive atmosphere and create a joyous ambiance, people will also set up ornaments on the Christmas trees for embellishment. Especially after the emergence of artificial Christmas trees, people can manufacture Christmas trees of various shapes, and according to the shape of the Christmas tree, hang lamp strings of different brightness, colors, etc. at different positions of the Christmas tree, and then respectively control different numbers of lamp strings to emit light according to the environmental conditions, such as indoor, outdoor, day, night, etc. This not only creates a comfortable atmosphere but also saves energy.

[0003] However, setting up different numbers of lamp strings not only requires different power supplies for power supply, but also different lamp strings need to cooperate with different controllers to control the switches, resulting in a complex circuit for controlling the Christmas tree and inconvenient control of the light emission of each lamp string. Summary of the Utility Model

[0004] Based on this, the purpose of the utility model is to overcome the defects or deficiencies of the prior art and provide a lamp string controller.

[0005] The utility model is realized through the following technical solutions:

[0006] A lamp string controller, comprising:

[0007] A housing, which has a sealed accommodation space inside and openings on opposite sides;

[0008] A control circuit board, which is arranged in the accommodation space and has a power supply terminal and an output terminal;

[0009] The control circuit board is provided with a circuit, and the circuit includes:

[0010] A main control chip, which is used to output high and low levels;

[0011] A voltage conversion module, which is connected to the power supply terminal of the main control chip, is used to connect to the DC power supply and supply power to the main control chip;

[0012] A control signal receiving module, which is connected to the input terminal of the main control chip, is used to obtain and transmit a trigger signal to the main control chip;

[0013] An LED driving module, which is connected to the output terminal of the main control chip, is used to control the power supply of the lamp string according to the high and low levels output by the main control chip;

[0014] The LED driving module includes a first driving module and a third driving module.

[0015] The first driving module includes a first triode, a fourth triode, a fifth triode, a second resistor, a third resistor, an eighth resistor, and an eleventh resistor. One end of the second resistor is connected to the corresponding output pin of the main control chip, and the other end is connected to the base of the fifth triode. The emitter of the fifth triode is grounded. One end of the third resistor is connected to the corresponding output pin of the main control chip, and the other end is connected to the base of the first triode. The emitter of the first triode is grounded, and the collector is connected to one end of the eighth resistor. The other end of the eighth resistor is connected to the base of the fourth triode. The emitter of the fourth triode is used to connect to the DC power supply. The collectors of the fifth triode and the fourth triode are used to be connected in parallel to the first end of the first string of LED lamp strings together. The eleventh resistor is connected between the base and the emitter of the fourth triode.

[0016] The third driving module includes a third triode, an eighth triode, a ninth triode, a fifth resistor, a sixth resistor, an eighth resistor, a tenth resistor, and a thirteenth resistor. One end of the sixth resistor is connected to the corresponding output pin of the main control chip, and the other end is connected to the base of the eighth triode. The emitter of the eighth triode is grounded. The fifth resistor is connected between the corresponding output pin of the main control chip and the base of the third triode. The emitter of the third triode is grounded, and the collector is connected to one end of the tenth resistor. The other end of the tenth resistor is connected to the base of the ninth triode. The emitter of the ninth triode is used to connect to the DC power supply. The collectors of the eighth triode and the ninth triode are used to be connected in parallel to the second end of the first string of lamp strings together. The thirteenth resistor is connected between the base and the emitter of the ninth triode.

[0017] The crystal oscillator module, which is used to form a crystal oscillator circuit, provides the clock signal required for the operation of the main control chip.

[0018] Two wiring lines respectively pass through two openings of the housing and are connected to the power supply end and the output end of the control circuit board.

[0019] The power supply end is used to connect to the DC power supply through the wiring line, and the output end is used to connect to the lamp string through the wiring line. The power supply from the power supply end to the output end is controlled according to the high and low levels output by the control circuit board.

[0020] Compared with the prior art, the lamp string controller of the present invention can realize the lighting of multiple lamp strings only through the high and low level output in one lamp string controller, simplify the control circuit of the lamp string, and provide convenience for the lighting control of multiple lamp strings.

[0021] In one embodiment, it further includes a keypad and keycaps. The keypad is located in the accommodation space and electrically connected to the control circuit board. The keycaps are close to the buttons on the keypad and pass through the housing. The keypad is electrically connected to the control circuit board. The keypad obtains the key signals generated when its buttons are pressed and transmits them to the control circuit board.

[0022] The control signal receiving module includes a key control unit, which is connected to the buttons on the keypad and is used to obtain and transmit the key signals to the main control chip.

[0023] In one embodiment, the LED driving module further includes a second driving module.

[0024] The second driving module includes a second triode, a seventh triode, a sixth triode, a fourth resistor, a seventh resistor, a ninth resistor, and an eleventh resistor. One end of the seventh resistor is connected to the corresponding output pin of the main control chip, and the other end is connected to the base of the seventh triode. The emitter of the seventh triode is grounded. The fourth resistor is connected between the corresponding output pin of the main control chip and the base of the second triode. The emitter of the second triode is grounded, and the collector is connected to one end of the ninth resistor. The other end of the ninth resistor is connected to the base of the sixth triode. The emitter of the sixth triode is used to connect to the DC power supply. The collectors of the seventh triode and the sixth triode are used to be connected in parallel to the second end of the second light string and the first end of the third light string in the LED light string together. The eleventh resistor is connected between the base and the emitter of the sixth triode. The first end of the second light string is connected to the collectors of the fifth triode and the fourth triode. The second end of the third light string is connected to the collectors of the eighth triode and the ninth triode.

[0025] In one embodiment, the voltage conversion module includes a first resistor, a second diode, a zener diode, and a filter capacitor. The anode of the second diode, the anode of the zener diode, and one end of the filter capacitor are connected in parallel and grounded in sequence. The cathode of the second diode, the cathode of the zener diode, and the other end of the filter capacitor are connected in parallel in sequence. The cathode of the second diode is used to connect to the DC power supply, and the other end of the filter capacitor is connected to the corresponding output pin of the main control chip, so that the current of the DC power supply flows from the second diode to the filter capacitor. The first resistor is connected between the second diode and the cathode of the zener diode.

[0026] In one embodiment, the crystal oscillator module includes a crystal oscillator, a second capacitor, and a third capacitor. Both ends of the crystal oscillator are respectively connected to the corresponding output pins of the main control chip. One end of the second capacitor is connected to the second end of the crystal oscillator, and the other end is grounded. One end of the third capacitor is connected to the first end of the crystal oscillator, and the other end is grounded.

[0027] In addition, the present invention also provides a string of lights to simplify the control circuit of the string of lights and facilitate the lighting control of multiple strings of lights. The technical solution is as follows:

[0028] An LED string of lights includes: an LED string of lights and the above-mentioned string of lights controller. The power supply terminal of the string of lights controller is used to connect to the DC power supply, and the output terminal is connected to the LED string of lights to drive the LED string of lights to emit light.

[0029] The present invention also provides an artificial Christmas tree to simplify the control circuit of the string of lights in the Christmas tree and facilitate the lighting control of multiple strings of lights. The technical solution is as follows:

[0030] An artificial Christmas tree includes:

[0031] a tree body and an LED string of lights hung on the tree body;

[0032] The LED string of lights includes: an LED string of lights and the above-mentioned string of lights controller. The power supply terminal of the string of lights controller is used to connect to the DC power supply, and the output terminal is connected to the LED string of lights to drive the LED string of lights to emit light.

[0033] For better understanding and implementation, the present invention will be described in detail below with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] Figure 1 is a schematic diagram of the overall structure of the artificial Christmas tree in the present invention;

[0035] Figure 2 is a schematic diagram of the overall structure of the string of lights with a single connector in the present invention;

[0036] Figure 3 is a schematic diagram of the overall structure of the string of lights with a double connector in the present invention;

[0037] Figure 4 is a schematic diagram of the overall structure of the controller in the present invention;

[0038] Figure 5 is a partial structural decomposition diagram of the controller in the present invention;

[0039] Figure 6 is a schematic diagram of the circuit module of the control circuit board in the present invention;

[0040] Figure 7 This is a schematic diagram of the circuit structure of the control circuit board in the present utility model. Detailed implementation manners

[0041] In the description of the present invention, it should be understood that the orientation or positional relationships indicated by the terms "center", "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. are based on the orientation or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation to the present invention. In the description of the present invention, unless otherwise specified, the meaning of "a plurality of" is two or more.

[0042] In the present utility model, by the high and low level outputs of the lamp string controller and in cooperation with the duty cycle control, the energization of two or more lamp strings hung on the Christmas tree is controlled, so that the lamp strings can be turned on / off or alternately flashed as needed, thereby simplifying the wiring of the lamp strings on the Christmas tree.

[0043] Specifically, please refer to Figure 1 , the artificial Christmas tree of the present utility model includes a tree body 1, an LED lamp string 2 and a controller 3.

[0044] Among them, the tree body 1 may include various shape structures of artificial Christmas trees in the prior art, such as having a plurality of / single tree branch bifurcations, multi-section / single-section tree trunks, etc.

[0045] The LED lamp string 2 is wound around the tree body 1 and includes a plurality of sub-lamp strings. The plurality of sub-lamp strings are electrically connected through a series circuit, a parallel circuit, a series-parallel hybrid circuit or a multi-loop. Please refer to Figure 2 , in one embodiment, the LED lamp string 2 includes two sub-lamp strings 21 and a first electrical connector 22. A plurality of serially connected lamp bodies are provided on each sub-lamp string 21. The two sub-lamp strings 21 are connected in parallel to the first electrical connector 22, and the first electrical connector 22 is connected to the controller 3. Please refer to Figure 3, in another embodiment, the LED string 2 further includes a second electrical connector 23, and the second electrical connector 23 is connected to two sub-strings 21; in use, the first electrical connector 22 of the first LED string is connected to the controller 3, the second electrical connector 23 of the first LED string is connected to the first electrical connector 23 of the second LED string, the second electrical connector 23 of the second LED string is connected to the first electrical connector 22 of the third LED string, and so on, to achieve the parallel connection between multiple LED strings 2, so as to increase the number of LED strings 2 hung on the tree body 1. In addition, multiple LED strings 2 can also be electrically connected by using series circuits, parallel circuits, series-parallel hybrid circuits or multi-loop circuits in the prior art.

[0046] Please refer to Figure 4 and Figure 5 , the controller 3 includes a housing 31, a keypad 32, a control circuit board 33, a seal 34, a keycap 35 and two wiring 36. The housing 31 includes an upper housing 311 and a lower housing 312. The upper housing 311 is covered on the lower housing 312 to form a sealed accommodation space therebetween. The keypad 32 and the control circuit board 33 are electrically connected and located in the accommodation space. Openings are provided on opposite sides of the housing 31, and the two wirings 36 respectively pass through the openings of the housing 31 and are connected to the power supply end and the output end of the control circuit board 33. Among them, the wiring 36 connected to the power supply end of the control circuit board 33 is connected to the DC power supply 100, and the wiring 36 connected to the output end is connected to the first electrical connector 23 of the LED string 2 to supply power to the LED string 2. The surface of the keypad 32 faces the upper housing 311, and the keycap 35 is close to the keypad 32 and passes through the housing 31. When the user presses the keycap 35, the corresponding key position on the keypad 32 is triggered, so that the keypad 32 obtains a key signal and transmits the key signal to the control circuit board 33. In this embodiment, the upper housing 311 and the lower housing 312 are fixed together by screws, and screw holes are provided on the side of the lower housing 312 facing away from the upper housing 311. The seal 34 includes a sealing washer 341 and a sealing plug 342. The sealing washer 341 surrounds between the upper housing 311 and the lower housing 312 to seal the connection between the upper housing 311 and the lower housing 312. The sealing plug 342 is inserted into the screw hole of the lower housing 312 and protrudes out of the lower housing 312. The lower housing 312 is separated from the ground and other objects by a certain distance, so as to prevent water and reduce the wear of the lower housing 31.

[0047] Please refer to Figure 6, the control circuit board 33 is placed on the inner bottom surface of the lower case 312 and is provided with a circuit, and the circuit includes a main control chip MCU, a voltage conversion module E1, a crystal oscillator module E2, a control signal receiving module E3, and an LED driving module E4.

[0048] The main control chip MCU is used to control the output of high and low levels.

[0049] The voltage conversion module E1 is connected between an external DC power supply 100 and the power supply terminal of the main control chip MCU, and is used to reduce the voltage of the DC power supply 100 and then provide a stable low-voltage current to the main control chip MCU and other modules.

[0050] The crystal oscillator module E2 is used to form a crystal oscillator circuit to provide the clock signal required for the operation of the main control chip MCU.

[0051] The control signal receiving module E3 is used to obtain the trigger signal of the user and control the LED driving module E4 to generate a level signal.

[0052] The input end of the LED driving module E4 is connected to the level signal output end of the main control chip MCU, and the output end is connected to each LED light string 2; the LED driving module drives each LED light string 2 to emit light or go out according to the level signal.

[0053] In this embodiment, the main control chip MCU controls the switch and switch duration of the LED light string 2 by controlling the high and low levels of the LED driving module E4. Please refer to Figure 7 , the LED light string 2 includes a first light string L1 formed by connecting a plurality of lamp bodies emitting warm white light in series, a second light string L2 formed by connecting a plurality of lamp bodies emitting colored light in series, and a third light string L3. The second light string L2 and the third light string L3 are connected in series and then connected in parallel with the first light string L1, and are hung at different positions of the tree body 1 as needed.

[0054] Specifically, the main control chip MCU is provided with 16 pins. Among them, the 5th pin and the 12th pin are power pins. The 5th pin is connected to the voltage conversion module E1, and the 12th pin is grounded; the 6th pin and the 7th pin are clock pins for connecting the crystal oscillator module E2; the 1st pin to the 4th pin, the 8th pin to the 11th pin, and the 13th pin to the 16th pin are I / O pins. Among them, the 2nd pin, the 3rd pin, the 4th pin, the 9th pin, the 10th pin, and the 11th pin are used to output the high and low level ratios for controlling the LED driving module E4; the 1st pin, the 8th pin, and the 13th pin to the 16th pin are used to connect the control signal receiving module E4 to input the key signal PWRKEY.

[0055] The voltage conversion module E1 includes a first resistor R1, a second diode D2, a zener diode DZ, and a filter capacitor C1. The anode of the second diode D2, the anode of the zener diode DZ, and one end of the filter capacitor C1 are connected in parallel in sequence and grounded. The cathode of the second diode D2, the cathode of the zener diode DZ, and the other end of the filter capacitor C1 are connected in parallel in sequence. The cathode of the second diode D2 is connected to the DC power supply 100, and the other end of the filter capacitor C1 is connected to the 5th pin. The current of the DC power supply flows from the second diode D2 to the filter capacitor C1. The first resistor R1 is connected between the cathode of the second diode D2 and the cathode of the zener diode DZ. Under the voltage reduction and current limiting effect of the first resistor R1, the first voltage V1 output by the DC power supply is reduced to a second voltage V2. Then, under the action of the zener diode DZ, the filter capacitor C1 obtains a stable voltage and supplies power to the main control chip MCU. The specific voltage value of the DC power supply is between 3V and 36V, and the specific voltage values of the first power supply V1 and the second power supply V2 are set according to actual needs. In this embodiment, the first voltage V1 is 29 volts, and the second voltage V2 is 4.7 volts.

[0056] The crystal oscillator module E2 includes a crystal oscillator Y1, a second capacitor C2, and a third capacitor C3. Both ends of the crystal oscillator Y1 are respectively connected to the 6th pin and the 7th pin; one end of the second capacitor C2 is connected to the second end of the crystal oscillator Y1, and the other end is grounded; one end of the third capacitor C3 is connected to the first end of the crystal oscillator Y1, and the other end is grounded; the values of the second capacitor C2 and the third capacitor C3 are set, and the crystal oscillator Y1 is started through the second capacitor C2 and the third capacitor C3 to realize the timing function of different times such as 4 hours, 6 hours, 8 hours, 10 hours, etc.

[0057] The control signal receiving module E3 includes a key control unit connected to the main control chip MCU, and the key control unit is connected to the buttons on the key board 32. When the user triggers the buttons with different functions, the key control unit obtains and outputs a corresponding key signal PWRKEY to the main control chip MCU. According to the key signal PWRKEY, different level signals are output from the corresponding pins of the main control chip MCU. In addition, the control signal receiving module E3 may further include a remote control unit. The remote control unit receives the remote control signal based on radio waves generated by the user operating the remote control, and outputs the remote control signal to the main control chip MCU. The main control chip MCU generates a level signal for controlling the LED driving module E4 according to the remote control signal.

[0058] Among them, in this embodiment, six function keys are provided on the key board 32, and the control signal receiving module E3 correspondingly includes the first key control unit, the second key control unit, the third key control unit, the fourth key control unit, the fifth key control unit, and the sixth key control unit E.

[0059] The first key control unit includes a first switch SW1, a first four-resistor R14, a first five-resistor R15, and a first indicator LED1. One end of the first four-resistor R14 and the first five-resistor R15 are connected in parallel to the 16th pin. The cathode of the first indicator LED1 is connected to the other end of the first four-resistor R14. One end of the first switch SW1 is connected to the other end of the first five-resistor R15. The other end of the first switch SW1 is connected in parallel with the anode of the first indicator LED1 and grounded. Pressing the corresponding function key can turn on or off the first switch SW1, triggering a signal for the light string to be in a constantly-on state.

[0060] The second key control unit includes a second switch SW2, a first seven-resistor R17, a first six-resistor R16, and a second indicator LED2. One end of the first seven-resistor R17 and the first six-resistor R16 are connected in parallel to the 15th pin. The cathode of the second indicator LED1 is connected to the other end of the first six-resistor R16. One end of the second switch SW2 is connected to the other end of the first seven-resistor R17. The other end of the second switch SW2 is connected in parallel with the anode of the second indicator LED2 and grounded. Pressing the corresponding function key can turn on or off the second switch SW2, triggering a signal for at least one light string to be in a constantly-on state and another light string to be in a flashing state.

[0061] The third key control unit includes a third switch SW3, a first nine-resistor R19, a first eight-resistor R18, and a third indicator LED3. One end of the first nine-resistor R19 and the first eight-resistor R18 are connected in parallel to the 14th pin. The cathode of the third indicator LED3 is connected to the other end of the first eight-resistor R18. One end of the third switch SW3 is connected to the other end of the first nine-resistor R19. The other end of the third switch SW3 is connected in parallel with the anode of the third indicator LED3 and grounded. Pressing the corresponding function key can turn on or off the third switch SW3, triggering a signal for the lamp bodies on at least two light strings to flash in sequence in one direction.

[0062] The fourth button control unit includes a fourth switch SW4, a twenty-first resistor R21, a twentieth resistor R20, and a fourth indicator light LED4. One ends of the twenty-first resistor R21 and the twentieth resistor R20 are connected in parallel to the 13th pin. The cathode of the fourth indicator light LED4 is connected to the other end of the twentieth resistor R20. One end of the fourth switch SW4 is connected to the other end of the twenty-first resistor R21. The other end of the fourth switch SW4 is connected in parallel with the anode of the fourth indicator light LED4 and grounded. Pressing the corresponding function button can turn on or off the fourth switch SW4, triggering a signal for at least two light strings to flash alternately.

[0063] The fifth button control unit includes a fifth switch SW5. One end of the fifth switch SW5 is connected to the 1st pin, and the other end is grounded. Pressing the corresponding function button can turn on or off the fifth switch SW5, triggering a signal for all the light string switches.

[0064] The sixth button control unit includes a sixth switch SW6. One end of the sixth switch SW6 is connected to the 8th pin, and the other end is grounded. Pressing the corresponding function button can turn on or off the sixth switch SW6, triggering a signal for timing to turn on and off all the light strings.

[0065] The LED driving module E4 includes a first driving module, a second driving module, and a third driving module.

[0066] The first driving module includes a first triode Q1, a fourth triode Q4, a fifth triode Q5, a second resistor R2, a third resistor R3, an eighth resistor R8, and an eleventh resistor R11. One end of the second resistor R2 is connected to the 11th pin, and the other end is connected to the base of the fifth triode Q5. The emitter of the fifth triode Q5 is grounded. One end of the eighth resistor R8 is connected to the 10th pin, and the other end is connected to the base of the fourth triode Q4. The emitter of the fourth triode Q4 is connected to the DC power supply 100. The collectors of the fifth triode Q5 and the fourth triode Q4 are connected in parallel to the first ends of the first light string L1 and the second light string L2. The eleventh resistor R11 is connected between the base and the emitter of the fourth triode Q4 to modulate the fourth triode Q4. Further, the third resistor R3 is connected between the 10th pin and the base of the first triode Q1. The emitter of the first triode Q1 is grounded, and the collector is connected to the eighth resistor R8 to amplify the current to drive the fourth triode Q4 to turn on and off.

[0067] The second driving module includes a second triode Q2, a seventh triode Q7, a sixth triode Q6, a fourth resistor R4, a seventh resistor R7, a ninth resistor R9, and a twelfth resistor R12. One end of the seventh resistor R7 is connected to the 9th pin, and the other end is connected to the base of the seventh triode Q7. The emitter of the seventh triode Q7 is grounded; one end of the ninth resistor R9 is connected to the 2nd pin, and the other end is connected to the base of the sixth triode Q6. The emitter of the sixth triode Q6 is connected to the DC power supply 100; the collectors of the seventh triode Q7 and the sixth triode Q6 are connected in parallel to the second end of the second lamp string L2 and the first end of the third lamp string L3; the eleventh resistor R11 is connected between the base and the emitter of the sixth triode Q6 to modulate the sixth triode Q6. Further, the fourth resistor R4 is connected between the 2nd pin and the base of the second triode Q2. The emitter of the second triode Q2 is grounded, and the collector is connected to the ninth resistor R9 to amplify the current to drive the on and off of the sixth triode Q6.

[0068] The third driving module 43 includes a third triode Q3, an eighth triode Q8, a ninth triode Q9, a fifth resistor R5, a sixth resistor R6, an eighth resistor R8, a tenth resistor R10, and a thirteenth resistor R13. One end of the sixth resistor R6 is connected to the 3rd pin, and the other end is connected to the base of the eighth triode Q8. The emitter of the eighth triode Q8 is grounded; one end of the tenth resistor R10 is connected to the 4th pin, and the other end is connected to the base of the ninth triode Q9. The emitter of the ninth triode Q9 is connected to the DC power supply 100; the collectors of the eighth triode Q8 and the ninth triode Q9 are connected in parallel to the second end of the first lamp string L1 and the second end of the third lamp string L3; the thirteenth resistor R13 is connected between the base and the emitter of the ninth triode Q9 to modulate the ninth triode Q9. Further, the fifth resistor R5 is connected between the 4th pin and the base of the third triode Q3. The emitter of the third triode Q3 is grounded, and the collector is connected to the tenth resistor R10 to amplify the current to drive the on and off of the ninth triode Q9.

[0069] In the circuit of the above LED driving module E4, the main control chip MCU outputs a high level to the base of the fifth triode Q5, and the fifth triode Q5 conducts; the main control chip MCU outputs a low level to the emitter of the fifth triode Q5, and the path of the fifth triode Q5 is closed. The main control chip MCU outputs a low level to the base of the fourth triode Q4, and the fourth triode Q4 conducts; the main control chip MCU outputs a high level to the emitter of the fourth triode Q4, and the path of the fourth triode Q4 is closed. The main control chip MCU outputs a high level to the base of the seventh triode Q7, and the seventh triode Q7 conducts; the main control chip MCU outputs a low level to the emitter of the seventh triode Q7, and the path of the seventh triode Q7 is closed. The main control chip MCU outputs a low level to the base of the sixth triode Q6, and the sixth triode Q6 conducts; the main control chip MCU outputs a high level to the emitter of the sixth triode Q6, and the path of the sixth triode Q6 is closed. The main control chip MCU outputs a high level to the base of the eighth triode Q8, and the eighth triode Q8 conducts; the main control chip MCU outputs a low level to the emitter of the eighth triode Q8, and the path of the eighth triode Q8 is closed. The main control chip MCU outputs a low level to the base of the ninth triode Q9, and the ninth triode Q9 conducts; the main control chip MCU outputs a high level to the emitter of the ninth triode Q8, and the path of the ninth triode Q9 is closed. By the cooperation of the high and low levels controlled by the main control chip MCU with the duty cycle, the lighting effects of the following embodiments but not limited thereto are achieved:

[0070] The main control chip MCU controls the output of high and low levels, conducts the fourth triode Q4, conducts the eighth triode Q8, and the first lamp string L1, the second lamp string L2, and the third lamp string L3 emit light.

[0071] The main control chip MCU controls the output of high and low levels, conducts the fourth triode Q4, conducts the seventh triode Q7, and the second lamp string L2 emits light.

[0072] The main control chip MCU controls the output of high and low levels, conducts the sixth triode Q6, conducts the eighth triode Q8, and the third lamp string L3 emits light.

[0073] By controlling the duty cycle of the output levels of each pin, the duration of the first lamp string L1, the second lamp string L2, and the third lamp string L3 being alternately turned off / on can be controlled, thereby achieving a flashing effect.

[0074] In addition, in this embodiment, the model of the main control chip MCU is PMC156_16; the models of the first triode Q1, the second triode Q2, and the third triode Q3 are 2N3904, the models of the fourth triode Q4, the sixth triode Q6, and the ninth triode Q9 are B772, and the models of the fifth triode 5, the seventh triode 7, and the eighth triode 8 are D882. Those skilled in the art can adjust the specific parameters of other capacitors and resistors according to needs, and the present utility model does not make specific limitations.

[0075] Compared with the prior art, the lamp string controller, the lamp string, and the artificial Christmas tree of the present utility model have the following advantages:

[0076] 1. The lamp string controller is separated from the LED lamp string body and is connected by wiring only during use. When the user arranges the Christmas tree, multiple LED lamp string bodies can be wound around the artificial Christmas tree as needed, and after connecting them in sequence, then connect the LED lamp string to the lamp string controller, thereby improving the installation convenience.

[0077] 2. A single lamp string controller controls multiple LED lamp strings simultaneously, simplifies the control circuit, and improves the convenience of controlling the lighting of the LED lamp strings.

[0078] 3. The user can control the lighting of the LED lamp strings through various methods such as buttons and remote controls, and cooperate with the duty cycle of the high and low levels to achieve the combination of various lighting effects of different LED lamp strings, creating various atmospheres.

[0079] 4. It has a timing function and can automatically select the number of switched-on and -off LED lamp strings according to time and ambient light brightness, saving energy and being environmentally friendly.

[0080] The above-described embodiments only represent several implementation manners of the present utility model, and the description thereof is relatively specific and detailed, but it should not be construed as a limitation to the scope of the utility model patent. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present utility model, several modifications and improvements can still be made, and these all belong to the protection scope of the present utility model.

Claims

1. A string of lights controller, characterized in that: Comprising: A housing having a sealed accommodation space therein and openings on opposite sides; A control circuit board disposed in the accommodation space, having a power supply terminal and an output terminal; The control circuit board is provided with a circuit, and the circuit includes: A main control chip for outputting high and low levels; A voltage conversion module connected to the power supply terminal of the main control chip, for connecting to a DC power supply and supplying power to the main control chip; A control signal receiving module connected to the input terminal of the main control chip, for acquiring and transmitting a trigger signal to the main control chip; An LED driving module connected to the output terminal of the main control chip, for controlling the power supply to the lamp string according to the high and low levels of the main control chip; The LED driving module includes a first driving module and a third driving module, The first driving module includes a first triode, a fourth triode, a fifth triode, a second resistor, a third resistor, an eighth resistor and an eleventh resistor; one end of the second resistor is connected to the corresponding output pin of the main control chip, and the other end is connected to the base of the fifth triode, and the emitter of the fifth triode is grounded; one end of the third resistor is connected to the corresponding output pin of the main control chip, and the other end is connected to the base of the first triode, and the emitter of the first triode is grounded, and the collector is connected to one end of the eighth resistor, and the other end of the eighth resistor is connected to the base of the fourth triode, and the emitter of the fourth triode is used to connect to the DC power supply; the collectors of the fifth triode and the fourth triode are used to be connected in parallel to the first end of the first lamp string in the LED lamp string together; the eleventh resistor is connected between the base and the emitter of the fourth triode; The third driving module includes a third triode, an eighth triode, a ninth triode, a fifth resistor, a sixth resistor, an eighth resistor, a tenth resistor and a thirteenth resistor; one end of the sixth resistor is connected to the corresponding output pin of the main control chip, and the other end is connected to the base of the eighth triode, and the emitter of the eighth triode is grounded; the fifth resistor is connected between the corresponding output pin of the main control chip and the base of the third triode, and the emitter of the third triode is grounded, and the collector is connected to one end of the tenth resistor, and the other end of the tenth resistor is connected to the base of the ninth triode, and the emitter of the ninth triode is used to connect to the DC power supply; the collectors of the eighth triode and the ninth triode are used to be connected in parallel to the second end of the first lamp string together; the thirteenth resistor is connected between the base and the emitter of the ninth triode; A crystal oscillator module for forming a crystal oscillator circuit, which provides a clock signal required for the operation of the main control chip; Two wiring lines respectively pass through the two openings of the housing and are connected to the power supply terminal and the output terminal of the control circuit board; The power supply terminal is used to connect to a DC power supply through the wiring line, and the output terminal is used to connect to a lamp string through the wiring line, and controls the power supply from the power supply terminal to the output terminal according to the high and low levels of the control circuit board.

2. The lamp string controller according to claim 1, wherein: It further includes a keypad and keycaps. The keypad is located in the accommodation space and electrically connected to the control circuit board. The keycaps are close to the buttons on the keypad and pass through the housing. The keypad is electrically connected to the control circuit board. The keypad obtains the key signals generated when its buttons are pressed and transmits them to the control circuit board. The control signal receiving module includes a key control unit, which is connected to the buttons on the keypad and is used to obtain and transmit the key signals to the main control chip.

3. The string light controller according to claim 1, wherein: The LED driving module further includes a second driving module. The second driving module includes a second triode, a seventh triode, a sixth triode, a fourth resistor, a seventh resistor, a ninth resistor, and a twelfth resistor. One end of the seventh resistor is connected to the corresponding output pin of the main control chip, and the other end is connected to the base of the seventh triode. The emitter of the seventh triode is grounded. The fourth resistor is connected between the corresponding output pin of the main control chip and the base of the second triode. The emitter of the second triode is grounded, and the collector is connected to one end of the ninth resistor. The other end of the ninth resistor is connected to the base of the sixth triode. The emitter of the sixth triode is used to connect to the DC power supply. The collectors of the seventh triode and the sixth triode are used to be connected in parallel to the second end of the second light string and the first end of the third light string in the LED light string. The eleventh resistor is connected between the base and the emitter of the sixth triode. The first end of the second light string is connected to the collectors of the fifth triode and the fourth triode. The second end of the third light string is connected to the collectors of the eighth triode and the ninth triode.

4. The light string controller according to claim 3, wherein: The voltage conversion module includes a first resistor, a second diode, a voltage stabilizing diode, and a filter capacitor. The anode of the second diode, the anode of the voltage stabilizing diode, and one end of the filter capacitor are connected in parallel and grounded in sequence. The cathode of the second diode, the cathode of the voltage stabilizing diode, and the other end of the filter capacitor are connected in parallel in sequence. The cathode of the second diode is used to connect to the DC power supply, and the other end of the filter capacitor is connected to the corresponding output pin of the main control chip, so that the current of the DC power supply flows from the second diode to the filter capacitor. The first resistor is connected between the second diode and the cathode of the voltage stabilizing diode.

5. The light string controller according to claim 4, wherein: The crystal oscillator module includes a crystal oscillator, a second capacitor, and a third capacitor. Both ends of the crystal oscillator are respectively connected to the corresponding output pins of the main control chip. One end of the second capacitor is connected to the second end of the crystal oscillator, and the other end is grounded. One end of the third capacitor is connected to the first end of the crystal oscillator, and the other end is grounded.

6. An LED light string, characterized in that, It includes: An LED light string and the light string controller according to any one of claims 1-5. The power supply terminal of the light string controller is used to connect to the DC power supply, and the output terminal is connected to the LED light string to drive the LED light string to emit light.

7. An artificial Christmas tree, characterized in that, It includes: The tree body and the LED light string hung on the tree body; The LED light string includes: an LED light string and the light string controller according to any one of claims 1-5; The power supply end of the light string controller is used to connect to the DC power supply, and the output end is connected to the LED light string to drive the LED light string to emit light.

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