A lens light strip with SPI control that can resume interrupted transmission

Abstract

This invention provides a lens light strip with SPI control that allows for breakpoint resumption, comprising at least two sets of SPI control sub-circuits. Each SPI control sub-circuit includes a control chip U1, an LED light strip group, a main data output resistor R6, a main data input resistor R7, an auxiliary data input resistor R8, and an auxiliary data output resistor R9. The anode of the LED light strip group is connected to the input voltage VDC, and the cathode of the LED light strip group is connected to the output terminal of the control chip U1. Pin 5 of the control chip U1 is grounded, and one end of the main data input resistor R7 is connected to pin 8 of the control chip U1. The advantages of this invention are: a lens light strip with SPI control that allows for breakpoint resumption, enabling grouped point control, achieving a continuous running effect, and allowing for breakpoint resumption.

Description

Technical Field

[0001] This utility model relates to lighting devices, and more particularly to a lens light strip with SPI control that can resume transmission after interruption. Background Technology

[0002] Lens light strips are an innovative lighting product that combines lens technology with LED light strips. Through the refraction, reflection, and diffusion of light by the lens, precise control and optimized distribution of light are achieved.

[0003] The existing lens light strips are controlled as a whole, meaning that the color of a single light strip changes simultaneously, and cannot be controlled in groups. Summary of the Invention

[0004] To address the problems in the existing technology, this utility model provides an SPI-controlled lens light strip with breakpoint resume capability.

[0005] This invention provides a lens light strip with breakpoint resume capability controlled by SPI, comprising at least two sets of SPI control sub-circuits. Each SPI control sub-circuit includes a control chip U1, an LED light strip group, a main data output resistor R6, a main data input resistor R7, an auxiliary data input resistor R8, and an auxiliary data output resistor R9. The anode of the LED light strip group is connected to the input voltage VDC, and the cathode of the LED light strip group is connected to the output terminal of the control chip U1. Pin 5 of the control chip U1 is grounded. One end of the main data input resistor R7 is connected to pin 8 of the control chip U1, and the other end of the main data input resistor R7 is connected to the main data output interface of the controller or the main data output interface of the control chip U1 of the previous SPI control sub-circuit. One end of the auxiliary data input resistor R8 is connected to pin 9 of the control chip U1, and the other end of the auxiliary data input resistor R8 is connected to the auxiliary data output interface of the controller or the auxiliary data output interface of the control chip U1 of the previous SPI control sub-circuit. One end of the main data output resistor R6 is connected to pin 6 of the control chip U1, and the other end of the main data output resistor R6 is connected to the main data input interface of the control chip U1 of the next SPI control sub-circuit. One end of the auxiliary data output resistor R9 is connected to the main data output interface of the controller or the main data output interface of the control chip U1 of the previous SPI control sub-circuit, and the other end of the auxiliary data output resistor R9 is connected to the auxiliary data input interface of the control chip U1 of the next SPI control sub-circuit.

[0006] As a further improvement of this utility model, the SPI control sub-circuit further includes an IC power supply capacitor C1, a power supply filter capacitor C2, and an IC power supply resistor R1. One end of the IC power supply resistor R1 is connected to the input voltage VDC, and the other end of the IC power supply resistor R1 is connected to pin 10 of the control chip U1. One end of the IC power supply capacitor C1 is connected to pin 10 of the control chip U1, and the other end of the IC power supply capacitor C1 is grounded. One end of the power supply filter capacitor C2 is connected to the input voltage VDC, and the other end of the power supply filter capacitor C2 is grounded.

[0007] As a further improvement of this utility model, pin 7 of the control chip U1 is grounded.

[0008] As a further improvement of this utility model, pin 5 of the control chip U1 is grounded.

[0009] As a further improvement of this utility model, the LED light strip group includes LEDW light string, LEDB light string, LEDG light string and LEDR light string. The anode of the LEDW light string is connected to the input voltage VDC, and the cathode of the LEDW light string is connected to pin 4 of the control chip U1. The anode of the LEDB light string is connected to the input voltage VDC, and the cathode of the LEDB light string is connected to pin 3 of the control chip U1. The anode of the LEDG light string is connected to the input voltage VDC, and the cathode of the LEDG light string is connected to pin 2 of the control chip U1. The anode of the LEDR light string is connected to the input voltage VDC, and the cathode of the LEDR light string is connected to pin 1 of the control chip U1.

[0010] As a further improvement of this utility model, a string voltage divider resistor R2 is connected in series in the LEDW string, a string voltage divider resistor R3 is connected in series in the LEDB string, a string voltage divider resistor R4 is connected in series in the LEDG string, and a string voltage divider resistor R5 is connected in series in the LEDR string.

[0011] The beneficial effects of this utility model are: through the above solution, a lens light strip controlled by SPI with breakpoint resume capability is provided, which can realize group point control, achieve a running light effect, and can resume from breakpoint. Attached Figure Description

[0012] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other solutions can be obtained based on these drawings without creative effort.

[0013] Figure 1This is a circuit diagram of a lens light strip with SPI control that can resume transmission after interruption, according to this utility model.

[0014] Figure 2 This is a circuit diagram of an SPI control sub-circuit for a lens light strip with breakpoint resume capability, according to this utility model. Detailed Implementation

[0015] It should be noted that, unless otherwise specified, the embodiments and features described in these embodiments can be combined with each other.

[0016] In the description of this utility model, it should be understood that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating orientation or positional relationships, are based on the orientation or positional relationships shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limiting the scope of protection of this utility model. Furthermore, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, features defined with "first," "second," etc., may explicitly or implicitly include one or more of that feature. In the description of this utility model, unless otherwise stated, "a plurality of" means two or more.

[0017] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0018] The present invention will be further described below with reference to the accompanying drawings and specific embodiments.

[0019] like Figures 1 to 2As shown, a lens light strip with breakpoint resume capability controlled by SPI includes at least two sets of SPI control sub-circuits. Each SPI control sub-circuit includes a control chip U1, an LED light strip group, a main data output resistor R6, a main data input resistor R7, an auxiliary data input resistor R8, and an auxiliary data output resistor R9. The anode of the LED light strip group is connected to the input voltage VDC, and the cathode of the LED light strip group is connected to the output terminal of the control chip U1. Pin 5 of the control chip U1 is grounded. One end of the main data input resistor R7 is connected to pin 8 of the control chip U1, and the other end of the main data input resistor R7 is connected to the main data output interface of the controller or the main data output interface of the control chip U1 in the previous SPI control sub-circuit. The auxiliary data output resistor R9... One end of the data input resistor R8 is connected to pin 9 of the control chip U1, and the other end of the auxiliary data input resistor R8 is connected to the auxiliary data output interface of the controller or the auxiliary data output interface of the control chip U1 of the previous SPI control sub-circuit. One end of the main data output resistor R6 is connected to pin 6 of the control chip U1, and the other end of the main data output resistor R6 is connected to the main data input interface of the control chip U1 of the next SPI control sub-circuit. One end of the auxiliary data output resistor R9 is connected to the main data output interface of the controller or the main data output interface of the control chip U1 of the previous SPI control sub-circuit, and the other end of the auxiliary data output resistor R9 is connected to the auxiliary data input interface of the control chip U1 of the next SPI control sub-circuit.

[0020] SP1, Serial Peripheral Interface, is a communication interface technology introduced by Motorola.

[0021] SPI is a high-speed, full-duplex, synchronous serial communication bus that uses only four pins on the chip (MISO, MOSI, NSS, and SCK). It is mainly used in EEPROM, FLASH, real-time clock, AD converter, and between digital signal processors and digital signal decoders.

[0022] The SPI control sub-circuit also includes an IC power supply capacitor C1, a power supply filter capacitor C2, and an IC power supply resistor R1. One end of the IC power supply resistor R1 is connected to the input voltage VDC, and the other end of the IC power supply resistor R1 is connected to pin 10 of the control chip U1. One end of the IC power supply capacitor C1 is connected to pin 10 of the control chip U1, and the other end of the IC power supply capacitor C1 is grounded. One end of the power supply filter capacitor C2 is connected to the input voltage VDC, and the other end of the power supply filter capacitor C2 is grounded.

[0023] Pin 7 of the control chip U1 is grounded.

[0024] Pin 5 of the control chip U1 is grounded.

[0025] The LED light strip group includes LEDW light strings, LEDB light strings, LEDG light strings, and LEDR light strings. The anode of the LEDW light string is connected to the input voltage VDC, and the cathode of the LEDW light string is connected to pin 4 of the control chip U1. The anode of the LEDB light string is connected to the input voltage VDC, and the cathode of the LEDB light string is connected to pin 3 of the control chip U1. The anode of the LEDG light string is connected to the input voltage VDC, and the cathode of the LEDG light string is connected to pin 2 of the control chip U1. The anode of the LEDR light string is connected to the input voltage VDC, and the cathode of the LEDR light string is connected to pin 1 of the control chip U1.

[0026] The LEDW string is connected in series with a string voltage divider resistor R2, the LEDB string is connected in series with a string voltage divider resistor R3, the LEDG string is connected in series with a string voltage divider resistor R4, and the LEDR string is connected in series with a string voltage divider resistor R5.

[0027] This embodiment preferably uses four sets of LED light strings, but is not limited to this.

[0028] The input voltage VDC in this embodiment is preferably +24V, but is not limited thereto.

[0029] This embodiment preferably uses 3 sets of SPI control sub-circuits to realize group control of 3 sets of light strips, but it is not limited to this.

[0030] The IC power supply resistor R1 is a voltage regulator and current limiter resistor, used to limit the operating current of the internal voltage regulator module when the chip's voltage regulation function is enabled.

[0031] Chip power supply voltage VDD: VDD = VCC - (IDD + IIN) * R1; where IIN is the operating current of the chip's internal voltage regulator module, and IDD is the chip's quiescent current (excluding the voltage regulator module current). The resistance value of R1 must ensure that VDD > 3V. The larger the resistance of R1, the lower the system power consumption, but the weaker the system's anti-interference capability; the smaller the resistance of R1, the higher the system power consumption and the higher the operating temperature. Therefore, the resistance R1 should be selected appropriately according to the system application environment during the design process.

[0032] The IC power supply capacitor C1 is 0.1-1uF to ensure stable power supply to the chip, so that the chip operation is not affected by voltage drop or voltage fluctuation.

[0033] Power supply filter capacitor C2 is the capacitor between the system power supply and ground. It is recommended to reserve this capacitor to avoid power fluctuations / spikes that may affect practical applications. A 1uF-10uF capacitor can be selected based on the actual system load.

[0034] The main data input resistor R7 and the auxiliary data input resistor R8 are protective resistors for the data input ports to prevent damage to the main data input DI and auxiliary data input BI ports caused by hot-plugging, reverse connection of power supply positive and negative terminals with signal lines, etc., which would result in abnormal line signals.

[0035] The main data output resistor R6 and the auxiliary data output resistor R9 are protection resistors for the signal output ports to prevent damage to the main data output port DO and the auxiliary data output port BO caused by hot-plugging, reversing the positive and negative terminals of the power supply and the signal lines.

[0036] The LED string voltage divider resistors R2, R3, R4, and R5 are the voltage divider resistors for the OUTW / B / G / R ports of the control chip U1. They are used to reduce the OUTR / G / B / W port voltage and lower chip power consumption. The calculation formula is RR / RG / RB / RW = (VCC - N * VLED - VDS) / ILED, where VCC is the input voltage, VLED is the LED voltage drop, ILED is the port output current, and VDS is the OUTR / G / B / W port voltage. When the voltage reaches 1V, the current output of the OUTR / G / B / W ports can be constant. Considering the voltage attenuation in actual applications, the voltage of the OUTR / G / B / W ports should be considered during the design to ensure constant current output. It is recommended that the OUTR / G / B / W port voltage VDS be designed to be around 3.0V, subject to the actual application. The reference values ​​for the voltage drop VLED of different colored LEDs are as follows: red LED voltage drop is about 2.2V, green LED voltage drop is about 3.2V, blue LED voltage drop is about 3.2V, and white LED voltage drop is about 3.2V. The actual specifications of the LEDs shall prevail.

[0037] LEDW is a white light string, usually with 6 LEDs per string; LEDB is a blue light string, usually with 6 LEDs per string; LEDG is a green light string, usually with 6 LEDs per string; and LEDR is a red light string, usually with 6 LEDs per string. Different duty cycles are generated through the OUTR, OUTG, OUTB, and OUTW control terminals to produce different color / brightness changes and functions such as running lights and scrolling lights.

[0038] The control chip U1 is a dedicated four-channel LED driver control circuit. Internally, it includes an intelligent digital interface data latching signal shaping and amplification driver circuit, a high-precision internal oscillator, a 20V high-voltage programmable constant current output driver, and a high-precision constant current control module, effectively ensuring high color consistency of the pixels in the driver circuit. The data protocol uses a single-wire return-to-zero code communication method. After power-on reset, the DIN pin receives data from the controller. The first 32 bits of data are extracted by the first chip and sent to its internal data latch. The remaining data is shaped and amplified by the internal shaping circuit and then forwarded to the next cascaded pixel via the DO port. The signal decreases by 32 bits with each pixel. The chip employs automatic shaping and forwarding technology, so the number of cascaded pixels is not limited by signal transmission speed, but only by the signal transmission rate. The chip's internal data latch generates different duty cycle control signals at the OUTR, OUTG, OUTB, and OUTW control terminals based on the received 32-bit data. When a RESET signal is input at the DIN terminal, all chips synchronously send the received data to their respective segments. After this signal ends, the chip will receive new data again. After receiving the initial 32-bit data, it forwards the data through the DO port. Before receiving a RESET code, the original outputs of the OUTR, OUTG, OUTB, and OUTW pins remain unchanged. Upon receiving a low-level RESET code of 280μs or more, the chip outputs the previously received 32-bit PWM data pulse width to the OUTR, OUTG, OUTB, and OUTW pins. The PWM control terminal can achieve 256 levels of adjustment with a scan frequency of 2kHz; it features a serial cascade interface, enabling data reception and decoding through a single signal line; the data transmission speed can reach 800Kbps; and it has a breakpoint resume function.

[0039] This utility model provides a lens light strip with breakpoint resume capability controlled by SPI. It can control the lens light strip to create effects such as running lights, color and brightness changes through point control. Because this SPI-controlled RGBW lens light strip also has a breakpoint resume function, it can also solve the problem that when one IC of some SPI light strips fails, the signal cannot continue to be transmitted, causing the subsequent light strips to be uncontrollable. It does not affect the continued transmission of the signal, so that the overall effect of the solution is not affected.

[0040] The above description, in conjunction with specific preferred embodiments, provides a further detailed explanation of the present invention. It should not be construed that the specific implementation of the present invention is limited to these descriptions. For those skilled in the art, various simple deductions or substitutions can be made without departing from the concept of the present invention, and all such modifications and substitutions should be considered within the protection scope of the present invention.

Claims

1. A lens light strip with SPI control that can resume interrupted transmission, characterized in that: The system includes at least two SPI control sub-circuits. Each SPI control sub-circuit includes a control chip U1, an LED strip group, a main data output resistor R6, a main data input resistor R7, an auxiliary data input resistor R8, and an auxiliary data output resistor R9. The anode of the LED strip group is connected to the input voltage VDC, and the cathode of the LED strip group is connected to the output terminal of the control chip U1. Pin 5 of the control chip U1 is grounded, and one end of the main data input resistor R7 is connected to pin 8 of the control chip U1. The other end of the main data input resistor R7 is connected to the main data output interface of the controller or the main data output interface of the control chip U1 of the previous SPI control sub-circuit. One end of the auxiliary data input resistor R8 is connected to pin 9 of the control chip U1, and the other end of the auxiliary data input resistor R8 is connected to the auxiliary data output interface of the controller or the auxiliary data output interface of the control chip U1 of the previous SPI control sub-circuit. One end of the main data output resistor R6 is connected to pin 6 of the control chip U1, and the other end of the main data output resistor R6 is connected to the main data input interface of the control chip U1 of the next SPI control sub-circuit. One end of the auxiliary data output resistor R9 is connected to the main data output interface of the controller or the main data output interface of the control chip U1 of the previous SPI control sub-circuit, and the other end of the auxiliary data output resistor R9 is connected to the auxiliary data input interface of the control chip U1 of the next SPI control sub-circuit.

2. The SPI-controlled lens light strip with breakpoint resume capability according to claim 1, characterized in that: The SPI control sub-circuit also includes an IC power supply capacitor C1, a power supply filter capacitor C2, and an IC power supply resistor R1. One end of the IC power supply resistor R1 is connected to the input voltage VDC, and the other end of the IC power supply resistor R1 is connected to pin 10 of the control chip U1. One end of the IC power supply capacitor C1 is connected to pin 10 of the control chip U1, and the other end of the IC power supply capacitor C1 is grounded. One end of the power supply filter capacitor C2 is connected to the input voltage VDC, and the other end of the power supply filter capacitor C2 is grounded.

3. The SPI-controlled lens light strip with breakpoint resume capability according to claim 1, characterized in that: Pin 7 of the control chip U1 is grounded.

4. The SPI-controlled lens light strip with breakpoint resume capability according to claim 1, characterized in that: The LED light strip group includes LEDW light strings, LEDB light strings, LEDG light strings, and LEDR light strings. The anode of the LEDW light string is connected to the input voltage VDC, and the cathode of the LEDW light string is connected to pin 4 of the control chip U1. The anode of the LEDB light string is connected to the input voltage VDC, and the cathode of the LEDB light string is connected to pin 3 of the control chip U1. The anode of the LEDG light string is connected to the input voltage VDC, and the cathode of the LEDG light string is connected to pin 2 of the control chip U1. The anode of the LEDR light string is connected to the input voltage VDC, and the cathode of the LEDR light string is connected to pin 1 of the control chip U1.

5. The SPI-controlled lens light strip with breakpoint resume capability according to claim 4, characterized in that: The LEDW string is connected in series with a string voltage divider resistor R2, the LEDB string is connected in series with a string voltage divider resistor R3, the LEDG string is connected in series with a string voltage divider resistor R4, and the LEDR string is connected in series with a string voltage divider resistor R5.

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