High-voltage 512 color LED lamp strip circuit

Abstract

This invention discloses a high-voltage 512 RGB LED strip circuit, comprising multiple parallel control units. Each control unit includes a transcoding chip and a series-connected first to Nth light-emitting control modules. Each of the first to Nth light-emitting control modules includes a control chip and three LED light-emitting modules with emission colors of red, green, and blue, respectively. The transcoding chip converts the signal from the DMX512 protocol controller into an SPI signal and outputs it to the control chip in the first light-emitting control module. The signal is then transmitted in series through the control chip in the first light-emitting control module to the control chip in the Nth light-emitting control module. The control chip controls the three light-emitting modules. This invention allows for parallel control of multiple control units and the use of SPI control chips instead of expensive DMX512 control chips in multiple light-emitting control modules. It also provides a larger number of control points, lower voltage drop, and is suitable for longer LED strips.

Description

Technical Field

[0001] This invention relates to LED lighting circuits, specifically disclosing a high-voltage 512 RGB LED strip circuit. Background Technology

[0002] High-voltage RGB LED strips consist of multiple parallel control units. Each control unit operates at the same voltage as the mains power, and each control point contains red, green, and blue light-emitting units. They can be controlled in segments to achieve RGB color changes. Currently, the control protocols for high-voltage RGB LED strips include SPI and DMX512. The SPI protocol is a serial signal, using multiple control chips connected in series. When any control chip is broken, the signal cannot be transmitted to subsequent control chips, causing the entire LED strip to fail. Furthermore, the interruption point is difficult to detect, making repair challenging. The DMX512 protocol, on the other hand, is a parallel signal, using multiple control chips connected in parallel. While it can control multiple control chips in parallel, DMX512 control chips are expensive, and it has fewer control points than the SPI protocol, making it unsuitable for longer LED strips. Summary of the Invention

[0003] The purpose of this invention is to provide a high-voltage 512 RGB LED strip circuit that can be controlled in parallel, is inexpensive, and has multiple control points.

[0004] To address the problems of existing technologies, this invention discloses a high-voltage 512 RGB LED strip circuit, comprising multiple parallel control units. The operating voltage of each control unit is equal to the mains voltage. Each control unit includes a transcoding chip and a series-connected first to Nth light-emitting control modules. Each first to Nth light-emitting control module includes a control chip and three LED light-emitting modules with emission colors of red, green, and blue, respectively. The transcoding chip converts the signal from the DMX512 protocol controller into an SPI signal and outputs it to the control chip in the first light-emitting control module. The signal is then transmitted in series through the control chip in the first light-emitting control module to the control chip in the Nth light-emitting control module. The control chip controls the three light-emitting modules.

[0005] The beneficial effects of this invention are as follows: Because it includes multiple parallel control units, each control unit contains a transcoding chip and multiple series-connected light-emitting control modules. Each light-emitting control module includes a control chip and three LED light-emitting modules of different colors. The transcoding chip converts the DMX512 protocol signal into an SPI signal, and then multiple series-connected SPI control chips receive and transmit the SPI signal to control the three LED light-emitting modules. This allows for parallel control of multiple control units. Even if the control chip in a certain control unit is broken, only that control unit is affected, not the entire light strip, and maintenance is easy. Furthermore, SPI control chips can be used instead of expensive DMX512 control chips in the multiple series-connected light-emitting control modules, reducing manufacturing costs. With more control points and lower circuit voltage drop, it is more suitable for longer light strips.

[0006] As a further improvement to the present invention: The control unit further includes a positive line, a negative line, a write address input line, a write address output line, a differential signal positive line, and a differential signal negative line; the transcoding chip includes a power supply terminal, a ground terminal, a write address input terminal, a write address output terminal, a transcoding data output terminal, a differential signal positive input terminal, and a differential signal negative input terminal. The power supply terminal is connected to the positive terminal of the LED light-emitting module in the first light-emitting control module through a first resistor, and is connected to the negative circuit through a first capacitor in series with the first resistor. The ground terminal is connected to the negative circuit. The write address input terminal is connected to the write address input line through a second resistor. The write address output terminal is connected to the write address output line through a third resistor. The differential signal positive input terminal and the differential signal negative input terminal are respectively connected to the differential signal positive line and the differential signal negative line through a fourth resistor and a fifth resistor, respectively.

[0007] The control unit further includes a positive line, a negative line, a write address input line, a write address output line, a differential signal positive line, and a differential signal negative line; the transcoding chip includes a power supply terminal, a ground terminal, a write address input terminal, a write address output terminal, a transcoding data output terminal, a differential signal positive input terminal, and a differential signal negative input terminal. The power supply terminal is connected to the positive terminal of the LED light-emitting module in the first light-emitting control module through a first resistor, and is connected to the negative circuit through a first capacitor in series with the first resistor. The ground terminal is connected to the negative circuit. The write address input terminal is connected to the write address input line through a second resistor. The write address output terminal is connected to the write address output line through a third resistor. The differential signal positive input terminal and the differential signal negative input terminal are respectively connected to the differential signal positive line and the differential signal negative line through a fourth resistor and a fifth resistor, respectively.

[0008] The three types of LED light-emitting modules consist of 5-7 LED beads with red, green and blue light-emitting colors respectively connected in series with a current-limiting resistor, and the operating voltage of the three types of LED light-emitting modules is 22-25V; or the three types of LED light-emitting modules consist of 5-7 LED beads with red, green and blue light-emitting chips packaged in series with a current-limiting resistor, and the operating voltage of the three types of LED light-emitting modules is 22-25V.

[0009] When the mains power is 220V, each control unit includes 8-10 light-emitting control modules; when the mains power is 110V, each control unit includes 4-5 light-emitting control modules. Attached Figure Description

[0010] Figure 1 This is a block diagram illustrating the principle of the present invention.

[0011] Figure 2 This is a circuit diagram of a control unit of the present invention. Detailed Implementation

[0012] To further understand the features, technical means, specific objectives, and functions of this invention, the invention will be described in further detail below with reference to the accompanying drawings and specific embodiments. In this application, "circuit" refers to a conductor used only for conducting current and containing no functional electronic components; while "circuit" refers to a unit with specific electrical functions that includes the above-mentioned circuitry and functional electronic components.

[0013] refer to Figure 1 A schematic diagram of a high-voltage 512 RGB LED strip circuit includes an external DMX512 protocol controller and multiple parallel control units M mounted on the LED strip. Each control unit includes a transcoding chip U1 and series-connected first to Nth light-emitting control modules L1-Ln. Each of the first to Nth light-emitting control modules includes a control chip U2 and three LED light-emitting modules L with red, green, and blue light colors, respectively. The controller sends DMX512 protocol signals to the multiple parallel transcoding chips U1. The transcoding chips U1 convert the DMX512 protocol signals into SPI signals and send them to the first light-emitting control module L1, which then sequentially transmits them to the Nth light-emitting control module Ln.

[0014] refer to Figure 2The LED light strip includes a circuit board and LED beads soldered onto the circuit board. The circuit structure described in this invention is disposed on the circuit board. Each control unit M has pads 1 to 5 at both ends. Thus, after one or more control units M are cut, they can be connected to an external controller and a drive power supply through the pads 1-5. A positive line V+ is provided between the two pads 1 at both ends of the control unit M, a differential signal positive line A is provided between the two pads 2, a differential signal negative line B is provided between the two pads 3, a write address input line PI and a write address output circuit PO are provided between the two pads 4, and a negative line V- is provided between the two pads 5. The multiple control units M are arranged sequentially along the length of the circuit board. The lines at the beginning and end of adjacent control units M are connected in sequence. Specifically, the positive circuit V+, differential signal positive line A, differential signal negative line B, write address output circuit PO, and negative line V- at the end of the first control unit are respectively connected to the positive circuit V+, differential signal positive line A, differential signal negative line B, write address input line PI, and negative line V- at the beginning of the second control unit.

[0015] The controller includes a positive power supply terminal V+, a negative power supply terminal V-, a write address output port PO, a positive differential signal input terminal A0, and a negative differential signal input terminal B0.

[0016] The transcoding chip U includes a power supply terminal VCC, a ground terminal G, a write address input terminal ADRI, a write address output terminal ADRO, a transcoding data output terminal DO, a differential signal positive input terminal A, and a differential signal negative input terminal B. The power supply terminal VCC is connected to the positive terminal of the LED light-emitting module L in the first light-emitting control module L1 through a first resistor R1, and is grounded through a first capacitor C1 connected in series with the first resistor R1. The ground terminal G is grounded through the negative terminal line. The write address input terminal ADRI, the write address output terminal ADRO, the differential signal positive input terminal A, and the differential signal negative input terminal B are respectively connected to the write address output circuit PO, the write address input line PI, the differential signal positive line A, and the differential signal negative line B through a second resistor R2, a third resistor R4, and a fifth resistor R5.

[0017] When the write address output port PO, differential signal positive input terminal A0, and differential signal negative input terminal B0 of the external controller are connected to the write address input line PI, differential signal positive line A, and differential signal negative line B on the circuit board respectively through corresponding pads, the write address input terminal ADRI of the transcoding chip U in the first control unit M on the circuit board is electrically connected to the write address output port PO of the external controller. The write address input terminals ADRI and write address output terminals ADRO of the transcoding chips U in multiple control units are connected in series to receive write address signals. The differential signal positive input terminals A and differential signal negative input terminals B of the transcoding chips U in multiple control units M are connected in parallel to the write differential signal positive input terminal A0 and differential signal negative input terminal B0 of the controller respectively to receive control signals.

[0018] The first to Nth light-emitting control modules L1-Ln each include a control chip U2 using the SPI protocol and three LED light-emitting modules with red, green, and blue light colors, respectively. The control chip U2 includes a power supply pin VDD, a ground pin S, a signal input pin DI, a signal output pin DO, a red light driving pin R, a green light driving pin G, and a blue light driving pin B. The signal input pin DI and the signal output pin DO of the control chips U2 in the first to Nth light-emitting control modules L1-Ln are connected in series through a second capacitor C2. Specifically, the signal input pin DI of the control chip U2 in the first light-emitting control module L1 is connected to the transcoding data output pin DO of the transcoding chip U1, while the signal output pin DO of the control chip U2 in the Nth light-emitting control module Ln is left floating. The grounding pin S of the control chip U2 of the first light-emitting control module L1 is connected to the negative line V-, and is connected to its power supply pin VDD through the third capacitor C3, and to the grounding pin S of the control chip U2 of the second light-emitting control module through the fourth filter capacitor C4. Its power supply pin VDD is connected to the grounding pin S of the control chip U2 of the second light-emitting control module through the sixth resistor R6, and so on, until the power supply pin VDD of the eighth light-emitting control module is connected to the positive line V+ through the sixth resistor R6. The three negative terminals of the three LED light-emitting modules L are respectively connected to the red light driving pin R, green light driving pin G, and blue light driving pin B of their control chip U2; and the positive terminals of the three LED light-emitting modules L of the first light-emitting control module are connected to the grounding pin S of the control chip U2 of the second light-emitting control module, and so on, until the positive terminals of the three LED light-emitting modules L of the Nth light-emitting control module are connected to the positive line V+. The power supply terminal VCC of the transcoding chip U is connected to the positive terminal of the three LED light-emitting modules L of the first light-emitting control module through the first resistor R1.

[0019] The three types of LED light-emitting modules L can each consist of 5-7 LEDs with red, green, and blue light-emitting colors connected in series with a current-limiting resistor Rd. Specifically, the red light-emitting module consists of 5-7 red LEDs connected in series with the current-limiting resistor R, the green light-emitting module consists of 5-7 green LEDs connected in series with the current-limiting resistor R, and the blue light-emitting module consists of 5-7 blue LEDs connected in series with the current-limiting resistor R. The total operating voltage of each module after series connection is 22-25V. Alternatively, each of the three LED light-emitting modules L can also consist of 5-7 LEDs simultaneously packaged with red, green, and blue light-emitting chips connected in series with the current-limiting resistor Rd. The total operating voltage of this module after series connection is also 22-25V. Thus, the total operating voltage of the control unit formed by the control chip U2 and the three LED light-emitting modules connected in series can be equal to the mains voltage. That is, when the mains voltage is 220V, each control unit includes 8-10 light-emitting control modules; when the mains voltage is 110V, each control unit includes 4-5 light-emitting control modules.

[0020] The working principle of this invention is as follows: The controller sends the DMX512 protocol signal to multiple parallel transcoding chips U1. The transcoding chip U1 converts the DMX512 protocol signal into an SPI signal and sends it to the control chip of the first light-emitting control module L1. The signal is then transmitted sequentially through the control chips in each light-emitting control module. After receiving the signal, the control chip of each light-emitting control module controls the three LED light-emitting modules connected to it, so that the three light-emitting modules in each light-emitting control module are independently controllable, ultimately realizing the overall color variation of the high-voltage LED light strip.

[0021] The beneficial effects of this invention are as follows: Because it includes multiple parallel control units, each control unit contains a transcoding chip and multiple series-connected light-emitting control modules. Each light-emitting control module includes a control chip and three LED light-emitting modules of different colors. The transcoding chip converts the DMX512 protocol signal into an SPI signal, and then multiple series-connected SPI control chips receive and transmit the SPI signal to control the three LED light-emitting modules. This allows for parallel control of multiple control units. Even if the control chip in a certain control unit is broken, only that control unit is affected, not the entire light strip, and maintenance is easy. Furthermore, SPI control chips can be used instead of expensive DMX512 control chips in the multiple series-connected light-emitting control modules, reducing manufacturing costs. With more control points and lower circuit voltage drop, it is more suitable for longer light strips.

[0022] The embodiments described above are merely illustrative of several implementations of the present invention, and while the descriptions are specific and detailed, they should not be construed as limiting the scope of the present invention. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of the present invention, and these modifications and improvements all fall within the scope of protection of the present invention. Therefore, the scope of protection of this patent should be determined by the appended claims.

Claims

1. A high-voltage 512 RGB LED strip circuit, comprising multiple parallel control units, wherein the operating voltage of the control units is equal to the mains voltage, characterized in that: The control unit includes a transcoding chip and a series-connected first to Nth light-emitting control modules. The first to Nth light-emitting control modules include a control chip and three LED light-emitting modules with light-emitting colors of red, green and blue, respectively. The transcoding chip converts the signal sent by the DMX512 protocol controller into an SPI signal and outputs it to the control chip in the first light-emitting control module. The signal is then transmitted in series through the control chip in the first light-emitting control module to the control chip in the Nth light-emitting control module. The control chip controls the three light-emitting modules.

2. The high-voltage 512 RGB LED strip circuit according to claim 1, characterized in that: The control unit further includes a positive line, a negative line, a write address input line, a write address output line, a differential signal positive line, and a differential signal negative line; the transcoding chip includes a power supply terminal, a ground terminal, a write address input terminal, a write address output terminal, a transcoding data output terminal, a differential signal positive input terminal, and a differential signal negative input terminal. The power supply terminal is connected to the positive terminal of the LED light-emitting module in the first light-emitting control module through a first resistor, and is connected to the negative circuit through a first capacitor in series with the first resistor. The ground terminal is connected to the negative circuit. The write address input terminal is connected to the write address input line through a second resistor. The write address output terminal is connected to the write address output line through a third resistor. The differential signal positive input terminal and the differential signal negative input terminal are respectively connected to the differential signal positive line and the differential signal negative line through a fourth resistor and a fifth resistor, respectively.

3. The high-voltage 512 RGB LED strip circuit according to claim 2, characterized in that: The control chip includes a power supply pin, a ground pin, a signal input pin, a signal output pin, a red light driving pin, a green light driving pin, and a blue light driving pin. The signal input pins and signal output pins of the control chips in the first to Nth light-emitting control modules are connected in series through a second capacitor. The signal input pin of the control chip in the first light-emitting control module is connected to the transcoding data output pin of the transcoding chip, its ground pin is connected to the negative line, and is connected to its power supply pin through a third capacitor and to the ground pin of the control chip in the second light-emitting control module through a fourth filter capacitor. Its power supply pin is connected to the ground pin of the control chip in the second light-emitting control module through a sixth resistor, and so on, until the power supply pin of the control chip in the Nth light-emitting control module is connected to the positive line through a sixth resistor. The three negative terminals of the three LED light-emitting modules are respectively connected to the red light driving pin, green light driving pin, and blue light driving pin of their control chips. The positive terminals of the three LED light-emitting modules in the first light-emitting control module are connected to the ground pin of the control chip in the second light-emitting control module, and so on, until the positive terminals of the three LED light-emitting modules L in the Nth light-emitting control module are connected to the positive line.

4. The high-voltage 512 RGB LED strip circuit according to claim 3, characterized in that: The three types of LED light-emitting modules consist of 5-7 LED beads with light-emitting colors of red, green and blue respectively, connected in series with a current-limiting resistor. The operating voltage of the three types of LED light-emitting modules is 22-25V.

5. The high-voltage 512 RGB LED strip circuit according to claim 3, characterized in that: The three types of LED light-emitting modules consist of 5-7 LED beads that are simultaneously packaged with red, green and blue light-emitting chips and connected in series with a current-limiting resistor. The operating voltage of the three types of LED light-emitting modules is 22-25V.

6. The high-voltage 512 RGB LED strip circuit according to claim 4 or 5, characterized in that: When the mains power is 220V, each control unit includes 8-10 light-emitting control modules; when the mains power is 110V, each control unit includes 4-5 light-emitting control modules.

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