High-voltage drive-free colorful LED lamp strip

Abstract

The utility model discloses a high-voltage drive-free colorful LED lamp strip which comprises a controller and a lamp strip body, and a rectifier module, a main power supply module and a main control module are arranged in the controller. The lamp strip body comprises a sheath, a core wire is wrapped in the sheath, a wire is arranged in the core wire, a plurality of sections of circuit boards are wrapped in the core wire, a sub power supply module, a plurality of point control modules and a plurality of low-voltage light-emitting modules are arranged on the circuit boards, the input end of the sub power supply module is connected to the output end of the rectifier module through the wire, and the output end of the rectifier module is connected to the power supply module. The output end of the circuit board outputs low-voltage direct current, the point control modules and the light-emitting modules are connected to the output ends of the sub power supply modules in parallel, and the output ends of the sub power supply modules on every two circuit boards are connected in parallel to jointly supply power to the point control modules and the light-emitting modules in the two circuit boards. The LED light source has the advantages of small circuit voltage drop, uniform long-distance light emission, flexible shearing and the like.

Description

Technical Field

[0001] This utility model relates to an LED lighting fixture, specifically disclosing a high-voltage driverless color LED light strip. Background Technology

[0002] Low-voltage LED light strips refer to LED light strips with an operating voltage below 36V. Conversely, LED light strips with an operating voltage above 36V can be called high-voltage LED light strips. Traditional low-voltage LED light strips first use an external power supply to convert 220V AC mains power into low-voltage DC power, which is then transmitted through copper foil circuitry on a circuit board to multiple control modules and light-emitting modules on the board. Each light-emitting module consists of multiple 3V LED beads connected in series, with one light-emitting module serving as the smallest cutting unit. Due to the low voltage of the light-emitting modules, fewer light strips are connected in series, allowing for more flexible cutting dimensions. However, due to the low-voltage power supply and the thin copper foil circuitry, the voltage drop is relatively large. Once the number of light-emitting modules in the light strip reaches a certain level, the light-emitting modules at the tail end cannot maintain normal operation, resulting in uneven overall light emission. Traditional high-voltage LED light strips consist of multiple circuit board segments, with LED beads on each segment connected in series to form an independent light-emitting module. These multiple circuit board segments are housed within a core wire, which contains power supply wires. Traditional high-voltage LED light strips solve the voltage drop problem to some extent by using wires for power supply. However, since each light-emitting module operates at 220V, a large number of LED beads need to be connected in series. Each light-emitting module occupies a long length on the circuit board, and the LED light strip must be cut in integer multiples of the length of a light-emitting module. This makes the cutting size inflexible and inconvenient to use. Utility Model Content

[0003] Therefore, it is necessary to address the existing technical problems by providing a high-voltage driverless LED strip light with low voltage drop, uniform brightness over long distances, flexible cutting, ease of use, and simple circuitry.

[0004] To address the existing technical problems, this utility model discloses a high-voltage driverless LED strip light, comprising a controller and a strip light body. The controller includes a power supply circuit. The strip light body includes an outer sheath, inside which is wrapped a core wire. Conductors are disposed within the core wire, and multiple circuit boards are wrapped within the core wire. A strip light circuit is disposed on the circuit board. The power supply circuit includes a rectifier module, a main power module, and a main control module. The input terminal of the rectifier module is connected to AC mains power, and its output terminal outputs 220V high-voltage DC power to the main power module and the strip light circuit. The main power module outputs low-voltage DC power to the main control module. The strip light circuit includes a sub-power module... The system includes multiple point control modules and multiple low-voltage light-emitting modules. Each light-emitting module comprises three light-emitting modules: a red light module, a green light module, and a blue light module, each consisting of several LED beads connected in series. The input terminal of the sub-power supply module is connected to the output terminal of the rectifier module via the wire, and its output terminal outputs low-voltage DC power. The multiple point control modules and light-emitting modules are connected in parallel to the output terminal of the sub-power supply module. The output terminals of the sub-power supply modules on every two circuit boards are connected in parallel to jointly power the multiple point control modules and light-emitting modules within the two circuit boards. Each point control module controls the three light-emitting modules of one light-emitting module. The signal of the main control module is transmitted sequentially in series through the multiple point control modules.

[0005] The beneficial effects of this utility model are as follows: This utility model uses a rectifier circuit to convert high-voltage AC mains power into high-voltage DC power, which is then supplied to each sub-power circuit on the light strip. Each sub-power circuit then converts the high-voltage DC power into low-voltage DC power, which is supplied to multiple sub-control modules and low-voltage light-emitting modules. The current is transmitted in the light strip at high voltage, resulting in low voltage loss. Furthermore, since the light-emitting modules are low-voltage modules, they contain fewer LEDs. Moreover, the sub-power circuits on each pair of circuit boards are connected in parallel. After cutting at any interval between any light-emitting modules on any circuit board, the sub-power circuits on adjacent circuit boards can supply power to the light-emitting modules whose sub-power circuits have been cut off, making the light strip cutting size more flexible.

[0006] This utility model can be further improved as follows: the rectifier module is a surface-mount bridge rectifier, and its two DC output terminals include a positive power supply terminal and a negative power supply terminal, with a first capacitor connected between the positive and negative power supply terminals; the main power supply module includes a power chip, which includes a drain pin, a feedback pin, a power supply pin, and a source pin. The drain pin is connected to the positive power supply terminal HV, and the source pin is connected to the negative terminal of the chopper inductor. The negative terminal of the chopper inductor is connected to the negative power supply terminal via a freewheeling diode. The power supply pin is connected to the source pin via a second capacitor, and the feedback pin is connected to the source pin via a first resistor and a second resistor and a second diode connected in series. A second resistor is connected to the positive terminal of the chopper inductor, and a third capacitor is connected to the source terminal. A fourth capacitor is connected between the chopper inductor and the negative terminal of the power supply. The main control module includes a main control microcontroller, which includes a positive terminal, a negative terminal, an intermittent mode terminal, a speed adjustment terminal, a continuous mode terminal, and a signal output terminal. The positive terminal is connected to the positive terminal of the chopper inductor of the main power supply module and is connected to the negative terminal of the power supply through a third resistor and a fifth capacitor in parallel. A switch is provided between the intermittent mode terminal or the continuous mode terminal and the negative terminal of the power supply. The negative terminal is connected to the negative terminal of the power supply. A fourth resistor is connected to the signal output terminal.

[0007] The sub-power module has the same internal structure as the main power module. Its chopper inductor is grounded through a third resistor, which is connected to the negative terminal of the power supply through a diode. A capacitor is connected between its drain pin and the ground terminal. The point control module includes a sub-control microcontroller, which includes a positive pin, a negative pin, a signal input pin, a signal output pin, a red light control pin, a green light control pin, and a blue light control pin. The positive pin is connected to the positive terminal of the chopper inductor of the sub-power module through a fifth resistor and to the negative terminal of the power supply through a sixth capacitor. The red light control pin, green light control pin, and blue light control pin are connected to the negative terminals of the three light-emitting modules through a sixth resistor, a seventh resistor, and an eighth resistor, respectively. The positive terminals of the three light-emitting modules are connected to the positive terminal of the chopper inductor of the sub-power module.

[0008] The two circuit boards are electrically connected end to end by a conductor splicing, and the rectifier module and sub-power module on the circuit board are located at the two non-spliced ​​ends of the two circuit boards.

[0009] The LED beads are encapsulated with parallel red, green, and blue light chips. The red, green, and blue light modules are each composed of red, green, and blue light chips from several LED beads connected in series with a resistor. The output voltage of the sub-power module is 18V. The operating voltage of the red, green, and blue light modules is 18V, and they are each composed of six red, green, and blue light chips from six LED beads connected in series with a resistor. Attached Figure Description

[0010] Figure 1 This is a schematic diagram of the power connector of this utility model.

[0011] Figure 2 This is a structural schematic diagram of the LED light strip of this utility model.

[0012] Figure 3 This is the circuit schematic diagram of this utility model.

[0013] Figure 4 This is the power supply circuit diagram of this utility model.

[0014] Figure 5 This is one of the schematic diagrams of the circuit board structure for the two-stage parallel power supply of this utility model.

[0015] Figure 6 This is the second schematic diagram of the circuit board structure for the two-section parallel power supply of this utility model.

[0016] Figure 7 This is a circuit diagram of the two parallel power supply circuit boards of this utility model. Detailed Implementation

[0017] To further understand the features, technical means, and specific objectives and functions achieved by this utility model, the following detailed description is provided in conjunction with the accompanying drawings and specific embodiments. In the following description, when an electronic component mainly functions as a power-consuming component, its current inflow end is the positive terminal and its current outflow end is the negative terminal; when an electronic component mainly functions as a power supply component, its current outflow end is the positive terminal and its current inflow end is the negative terminal.

[0018] refer to Figure 1 and Figure 2A high-voltage, driverless, multi-colored LED light strip includes a power connector 1 and an LED light strip 2. One end of the power connector 1 is connected to a controller 11, which contains a power circuit. The other end of the power connector 1 has a light strip slot 12, in which three pins 13 electrically connected to the controller 11 are located. The LED light strip 2 includes an outer sheath 21, with a core wire 22 containing three conductors 23. Multiple circuit boards 24 are installed within the core wire 22, and multiple colored LED beads 25 are mounted on the circuit boards 24. The LED light strip 2 is installed in the light strip slot 1, and the three pins 13 are inserted into the LED light strip 2 and electrically connected to the three conductors 23 respectively, to transmit the controller's current and signals to the LED light strip. The colored LED beads operate at 3V and contain three light-emitting chips (red, green, and blue) connected in parallel. Every six colored LED beads are connected in series to form a light-emitting module 250. The light-emitting module 250 includes a red light module 25R, a green light module 25G, and a blue light module 25B, each consisting of red, green, and blue light-emitting chips connected in series within six of the aforementioned colored LED beads, with an operating voltage of 18V. Of course, by adjusting the number of LED beads connected in series, the operating voltage of the three light-emitting modules can also be 12V, 24V, or 36V, etc.

[0019] refer to Figure 3 and Figure 4 The power circuit on the power connector includes a rectifier module DB, a main power module S1, and a main control module M1. The rectifier module DB converts 220V AC mains power into 220V DC power and outputs it to the main power module S1. The main power module S1 converts the 220V DC power into a stable 5V DC power to power the main control module M1. The main control module M1 is equipped with a control program and signal output terminals.

[0020] The rectifier module DB is a surface-mount bridge rectifier with two AC input terminals and two DC output terminals. The two DC output terminals include a positive power supply terminal HV+ and a negative power supply terminal HV-. The two AC input terminals are used to connect to AC mains power, and a first capacitor C1 is connected between the positive power supply terminal HV+ and the negative power supply terminal HV-.

[0021] The main power module S1 includes a power chip IC, which includes a drain pin DIN, a feedback pin FB, a power supply pin VCC, and a source pin S. The drain pin DIN is connected to the positive terminal HV+ of the power supply. The drain pin DIN is the source contact of the chip's built-in power MOSFET, used for power chip startup and providing internal operating current. The source pin S is connected to the negative terminal of inductor L. The negative terminal of the chopper inductor L, through which a freewheeling diode D1 is connected, is connected to the negative terminal HV- of the power supply. The source pin S is the source connection point of the chip's built-in MOSFET and also serves as the ground reference for the bypass and feedback pin FB. The chopper inductor L outputs 5V DC power to power the main control microcontroller U1. The power supply pin VDD is connected to the source pin S through a second capacitor C2, which provides power after the power chip starts up. The feedback pin FB is connected to the source pin S through a first resistor R1, and then connected to the positive terminal of the chopper inductor L through a second resistor R3 and a second diode D2 in series. The second resistor R2 is then connected to the source pin S through a third capacitor C3. The second resistor R1 and the second resistor R2 are the comparison sampling resistors for the feedback pin FB. The output voltage of the power module can be adjusted by regulating the voltage division ratio of the first and second resistors and the inductance of the chopper inductor. The third capacitor C3 prevents voltage spikes and ripple from interfering with the sampling signal, and the second diode D2 prevents interference between the sampling signal and subsequent circuits. A fourth capacitor C4 and the third resistor R3 are connected in parallel between the chopper inductor L and the negative terminal HV- of the power supply.

[0022] The main control module M1 includes a main control microcontroller U1, which has a positive pin VDD, a negative pin GND, an intermittent mode pin LM, a speed adjustment pin SP, a continuous mode pin CM, and a signal output pin DAT. The positive pin VDD is connected to the positive terminal of the chopper inductor L of the main power module and is connected to the negative power supply terminal HV- through a parallel connection of a third resistor R3 and a fifth capacitor C5. A switch K is provided between the intermittent mode pin LM or the continuous mode pin CM and the negative power supply terminal HV-. The negative pin GND is connected to the negative power supply terminal HV-. A fourth resistor R4 is connected to the signal output pin DAT.

[0023] refer to Figures 5 to 7Each circuit board includes a sub-power module S2, multiple point control modules M2, and multiple light-emitting modules 250. The sub-power module S2 has the same internal structure as the main power module S1. Its chopper inductor L is grounded through a third resistor R3, which is connected to the negative terminal HV- of the power supply through a diode D. A capacitor C is connected between its drain pin DIN and the ground terminal. Its chopper inductor L outputs 18V DC to power the multiple point control modules M2 and the light-emitting modules 250. Each point control module M2 includes three output control terminals, each controlling one of the three light-emitting modules in a light-emitting module 250. The output terminals of the sub-power modules S2 on every two circuit boards 24 are connected in parallel, jointly powering the multiple point control modules M2 and the light-emitting modules 250 on those two circuit boards. That is, starting from the beginning of the LED strip, the sub-power modules S2 on the odd-numbered circuit board 241 with odd serial numbers are connected in parallel with the even-numbered circuit board 242 with even serial numbers, and so on. The two ends of the two circuit boards 241 / 242 are connected by solder paste or leads. Alternatively, all the sub-power modules S2 on the LED strip could be connected in parallel to power all the point control modules M2, but this would require connecting all the circuit boards, resulting in a large amount of soldering. This invention connects the sub-power modules S2 of adjacent circuit boards in parallel, which allows for cutting within each 250-degree light-emitting module and simplifies the manufacturing process of the LED strip.

[0024] refer to Figure 5 If both the rectifier module DB and the sub-power module S2 are located on the left side of the circuit board, when the cutting position falls within the odd-numbered circuit board 241, all the light-emitting modules 250 at both ends of the cutting opening have circuit continuity and can be used normally; when the cutting position falls within the even-numbered circuit board 242, the light-emitting modules 250 on the right side of the even-numbered circuit board 242 cannot light up because there is no circuit continuity. Therefore, this implementation method can only achieve conditional flexible cutting of the LED strip. As a further improvement of this utility model, see reference... Figure 6 The rectifier module DB and the sub-power module S2 are located at the non-joined end of the circuit board 24. Specifically, on the odd-numbered circuit board 241, the rectifier module DB and the sub-power module S2 are located at the beginning of the circuit board; on the even-numbered circuit board 242, the rectifier module DB and the sub-power module S2 are located at the end of the circuit board. The end of the odd-numbered circuit board 241 is joined to the beginning of the even-numbered circuit board 242. In this way, regardless of whether the cutting position falls on the odd-numbered circuit board 241 or the even-numbered circuit board 242, all the light-emitting modules 250 at both ends of the cutting opening are electrically connected, allowing for unconditional and arbitrary cutting, and making the cutting position more flexible.

[0025] The point control module M2 includes a sub-controller microcontroller U2, which has a positive pin VDD, a negative pin GND, a signal input pin DAT / DAT2, a signal output pin DOUT, a red light control pin R, a green light control pin G, and a blue light control pin B. The positive pin VDD is connected to the positive terminal of the chopper inductor L via a fifth resistor R5, and to the negative terminal of the power supply HV- via a sixth capacitor C6. The red light control pin R, the green light control pin G, and the blue light control pin B are connected to the negative terminals of the red light module 25R, the blue light module 25G, and the blue light module 25B respectively via a sixth resistor R6, a seventh resistor R7, and an eighth resistor R8. The positive terminals of the red light module 25R, the blue light module 25G, and the blue light module 25B are connected to the positive terminal of the chopper inductor L. The negative pin GND is connected to the negative terminal of the power supply HV-. The signal output pin and signal input pin of the sub-control microcontroller U2 are connected in series through resistor R. The signal input pin of the first sub-control microcontroller U2 located at the end of the LED light strip is connected to the signal output pin of the main control microcontroller in the power supply circuit through the ninth resistor R9. The control signal of the main control module is transmitted sequentially through each sub-control microcontroller.

[0026] This invention utilizes a rectifier circuit to convert high-voltage AC mains power into high-voltage DC power, which is then transmitted through wires within the LED strip to the sub-power circuits on each circuit board. Each sub-power circuit then converts the high-voltage DC power into low-voltage DC power, supplying it to multiple sub-control modules and low-voltage light-emitting modules. Current is transmitted at high voltage within the strip, resulting in minimal voltage loss. Furthermore, since the sub-power modules on every two circuit boards are connected in parallel, regardless of which light-emitting module is cut from any section of the circuit board, the sub-power module on the other circuit board connected in parallel can still power the remaining control modules and light-emitting modules on the cut circuit board. Moreover, because the light-emitting modules are low-voltage modules, they contain fewer LED beads and are shorter, allowing for more flexible cutting dimensions of the LED strip. Finally, by placing the sub-power modules on the LED strip's circuit board, no driver power supply is needed in the power connector, making the strip more convenient to use.

[0027] The above-described embodiments are merely illustrative of several implementations of this utility model, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of this utility model patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these all fall within the protection scope of this utility model. Therefore, the protection scope of this utility model patent should be determined by the appended claims.

Claims

1. A high-voltage driverless RGB LED strip, comprising a controller and a strip body, wherein the controller includes a power supply circuit; the strip body includes an outer sheath, a core wire is wrapped inside the outer sheath, a conductor is disposed within the core wire, and multiple circuit boards are wrapped inside the core wire, wherein the circuit boards are provided with strip circuitry, characterized in that: The power supply circuit includes a rectifier module, a main power module, and a main control module. The input terminal of the rectifier module is connected to AC mains power, and its output terminal outputs 220V high-voltage DC power to the main power module and the LED strip circuit. The main power module outputs low-voltage DC power to the main control module. The LED strip circuit includes a sub-power module, multiple point control modules, and multiple low-voltage light-emitting modules. The light-emitting modules include three light-emitting modules: a red light module, a green light module, and a blue light module, each composed of several LED beads connected in series. The input terminal of the sub-power module is connected to the output terminal of the rectifier module via the wire, and its output terminal outputs low-voltage DC power. The multiple point control modules and light-emitting modules are connected in parallel to the output terminal of the sub-power module. The output terminals of the sub-power modules on every two circuit boards are connected in parallel to jointly power the multiple point control modules and light-emitting modules within the two circuit boards. Each point control module controls the three light-emitting modules of one light-emitting module. The signal from the main control module is transmitted sequentially in series through the multiple point control modules.

2. The high-voltage driverless RGB LED strip according to claim 1, characterized in that: The rectifier module is a surface-mount bridge rectifier, with two DC output terminals including a positive power supply terminal and a negative power supply terminal. A first capacitor is connected between the positive and negative power supply terminals. The main power supply module includes a power chip, which has a drain pin, a feedback pin, a power supply pin, and a source pin. The drain pin is connected to the positive power supply terminal (HV), and the source pin is connected to the negative terminal of the chopper inductor. A freewheeling diode is connected to the negative power supply terminal through the negative terminal of the chopper inductor. The power supply pin is connected to the source pin through a second capacitor. The feedback pin is connected to the source pin through a first resistor and then connected to the chopper inductor through a second resistor and a second diode connected in series. The positive terminal, the second resistor, and the third capacitor are connected to the source terminal. A fourth capacitor is connected between the chopper inductor and the negative terminal of the power supply. The main control module includes a main control microcontroller, which includes a positive terminal, a negative terminal, an intermittent mode terminal, a speed adjustment terminal, a continuous mode terminal, and a signal output terminal. The positive terminal is connected to the positive terminal of the chopper inductor of the main power supply module and is connected to the negative terminal of the power supply through a third resistor and a fifth capacitor in parallel. A switch is provided between the intermittent mode terminal or the continuous mode terminal and the negative terminal of the power supply. The negative terminal is connected to the negative terminal of the power supply. A fourth resistor is connected to the signal output terminal.

3. The high-voltage driverless RGB LED strip according to claim 2, characterized in that: The sub-power module has the same internal structure as the main power module. Its chopper inductor is grounded through a third resistor, which is connected to the negative terminal of the power supply through a diode. A capacitor is connected between its drain pin and the ground terminal. The point control module includes a sub-control microcontroller, which includes a positive pin, a negative pin, a signal input pin, a signal output pin, a red light control pin, a green light control pin, and a blue light control pin. The positive pin is connected to the positive terminal of the chopper inductor of the sub-power module through a fifth resistor and to the negative terminal of the power supply through a sixth capacitor. The red light control pin, green light control pin, and blue light control pin are connected to the negative terminals of the three light-emitting modules through a sixth resistor, a seventh resistor, and an eighth resistor, respectively. The positive terminals of the three light-emitting modules are connected to the positive terminal of the chopper inductor of the sub-power module.

4. The high-voltage driverless RGB LED strip according to claim 3, characterized in that: The two circuit boards are electrically connected end to end by a conductor splicing, and the rectifier module and sub-power module on the circuit board are located at the two non-spliced ​​ends of the two circuit boards.

5. The high-voltage driverless RGB LED strip according to claim 1, characterized in that: The LED beads are encapsulated with parallel red light chips, green light chips and blue light chips. The red light module, green light module and blue light module are respectively composed of red light chips, green light chips and blue light chips of several LED beads and resistors connected in series.

6. The high-voltage driverless RGB LED strip according to claim 5, characterized in that: The output voltage of the sub-power module is 18V, and the operating voltage of the red light module, green light module and blue light module is 18V. They are composed of six LED beads, each consisting of a red light chip, a green light chip and a blue light chip, connected in series with a resistor.

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