Stage lamp optical parameter monitoring circuit

Abstract

The utility model relates to the field of optical parameter monitoring circuits, and particularly discloses a stage lamp optical parameter monitoring circuit, which comprises an optical sensor mounted beside an LED light source and used for acquiring optical parameters of the LED light source in real time, and an LED light source driving chip electrically connected with the positive electrode and the negative electrode of the LED light source, the output end of the optical sensor is electrically connected with an MCU controller used for obtaining LED light source optical parameters collected by the optical sensor, and the serial port communication end of the MCU controller is electrically connected with a storage device used for the MCU controller to retrieve and store the set LED light source optical parameters according to the LED light source optical parameters. The PWM end of the MCU controller outputs digital signals to the digital signal input end of the LED light source driving chip according to the LED light source optical parameters and the set LED light source optical parameters.

Description

Technical Field

[0001] This utility model relates to the field of optical parameter monitoring circuits, and in particular to an optical parameter monitoring circuit for stage lighting fixtures. Background Technology

[0002] Stage lighting plays a crucial role in stage performances. It not only provides the audience with a clear visual experience but also enhances the artistic effect and emotional expression of the performance in various ways. Stage lighting allows the audience to clearly see the actors' performances and costume details, ensuring their understanding and appreciation of the performance. Stage lighting can guide the audience's gaze, highlighting specific areas or characters on stage, helping them focus on key parts of the performance. Through different stage lighting effects, character portrayals can be shaped, emotions can be heightened, and stage illusions can be created. For example, changes in color, brightness, and shadow can express a character's psychological activities and emotional state. Stage lighting can create the specific spatial environment required in the play, including time, place, and season, helping the audience better immerse themselves in the world of the story. The color, intensity, and variation of stage lighting can render the atmosphere of the play and enhance the dramatic effect. For example, red may convey passion or danger, while blue may convey calm or melancholy. In some special stage performances, stage lighting can also be combined with stage special effects to enhance the visual effects and the impact of the performance.

[0003] However, achieving the above-mentioned effects with stage lighting is not simple; it requires significant manpower and resources to set up and adjust its optical parameters. Under current technological conditions, due to the errors between different LED light sources and optical components, stage lighting fixtures need to be calibrated and adjusted by factory testing personnel during the factory stage. Testing personnel need to use testing equipment to test the optical parameters of each stage light fixture, and then adjust and test them according to their individual optical parameters to ensure that the optical parameters of each stage light fixture are basically consistent, thus guaranteeing the stage lighting effect. After the stage lighting fixtures reach the lighting designer, the lighting designer still needs to adjust the optical parameters of the stage lights to change their stage lighting effects. When adjusting some complex color effects, the lighting designer often needs to make adjustments bit by bit to find the correct and suitable stage lighting effect, and cannot quickly adjust to achieve the desired effect. Furthermore, with long-term use, problems such as light decay, color difference, and color cast will gradually appear. Due to the physical nature of LED light sources, these problems cannot be fundamentally solved; further adjustments are necessary to achieve the desired stage lighting effect, which requires a significant investment of manpower, resources, and time. Furthermore, in emergency situations, users may experience performance accidents, resulting in economic losses. Utility Model Content

[0004] The purpose of this invention is to provide a stage lighting optical parameter monitoring circuit that can monitor the LED optical parameters in real time, so as to quickly switch to the required stage lighting effects and save manpower, material resources and time costs for later debugging.

[0005] The stage lighting optical parameter monitoring circuit of this utility model includes an optical sensor installed next to an LED light source for real-time acquisition of the LED light source's optical parameters, an LED light source driver chip electrically connected to the positive and negative terminals of the LED light source, an MCU controller electrically connected to the output terminal of the optical sensor for acquiring the LED light source's optical parameters acquired by the optical sensor, a serial communication terminal of the MCU controller electrically connected to a memory for the MCU controller to retrieve and store preset LED light source optical parameters according to the LED light source's optical parameters, and a PWM terminal of the MCU controller outputting a digital signal to the digital signal input terminal of the LED light source driver chip according to the LED light source's optical parameters and the preset LED light source optical parameters.

[0006] The stage lighting optical parameter monitoring circuit described in this invention collects LED light source optical parameters in real time via an optical sensor and transmits them to an MCU controller. The MCU controller retrieves and compares these parameters with pre-set LED light source optical parameters stored in the memory. A digital signal is then output from the PWM terminal to the digital signal input terminal of the LED light source driver chip. The LED light source driver chip then adjusts the LED light source to quickly switch to the desired stage lighting effect, thus saving manpower, resources, and time costs associated with later debugging. Furthermore, since the pre-set LED light source optical parameters are stored in the memory, the MCU controller can read these parameters at the factory stage and automatically control the stage lighting setup based on the real-time data collected by the optical sensor, eliminating the need for factory personnel to test and debug each individual stage light. In addition, the real-time detection of the LED light source by the optical sensor provides a clear understanding of its status, allowing for rapid troubleshooting when problems arise, thereby extending the lifespan of the LED light source.

[0007] As a preferred embodiment of this utility model, the LED light source driver chip is a synchronous buck driver chip. An N-type power MOSFET and an inductor are respectively disposed between the GATE pin of the synchronous buck driver chip and the negative terminal of the LED light source. The gate of the N-type power MOSFET is electrically connected to the GATE pin of the synchronous buck driver chip, the source is grounded, the drain is connected to one end of the inductor, and the other end of the inductor is electrically connected to the negative terminal of the LED.

[0008] In a preferred embodiment of this invention, the drain of the N-type power MOSFET is also electrically connected to the LX pin of the synchronous buck driver chip.

[0009] As a preferred embodiment of this utility model, a detection resistor is provided between the SNSH pin and the SNSL pin of the synchronous buck driver chip. One end of the detection resistor is electrically connected to the SNSH pin of the synchronous buck driver chip, and the other end is electrically connected to the SNSL pin of the synchronous buck driver chip and the positive electrode of the LED light source.

[0010] As a preferred embodiment of this utility model, the detection resistor includes a first resistor, a second resistor, and a third resistor, which are connected in parallel. One end of the first resistor, the second resistor, and the third resistor are electrically connected to the SNSH pin of the synchronous buck driver chip, and the other end is electrically connected to the SNSL pin of the synchronous buck driver chip and the positive electrode of the LED light source.

[0011] As a preferred embodiment of this utility model, the PDRV pin of the synchronous buck driver chip is electrically connected to a P-type power MOSFET. The gate of the P-type power MOSFET is electrically connected to the PDRV pin of the synchronous buck driver chip, the source is electrically connected to the positive terminal of the LED light source, and the drain is electrically connected to the negative terminal of the LED light source.

[0012] As a preferred embodiment of this utility model, the MCU controller is electrically connected to the optical sensor through the I2C interface. Specifically, the GPIO1 pin of the MCU controller is electrically connected to the INTN pin of the optical sensor, the GPIO2 pin of the MCU controller is electrically connected to the VSYNC pin of the optical sensor, the SCL pin of the MCU controller is electrically connected to the SCL pin of the optical sensor, and the SDA pin of the MCU controller is electrically connected to the SDA pin of the optical sensor.

[0013] As a preferred embodiment of this utility model, a filter capacitor is provided between the PWM terminal of the MCU controller and the digital signal input terminal of the LED light source driver chip. One end of the filter capacitor is electrically connected to the PWM terminal of the MCU controller and the digital signal input terminal of the LED light source driver chip, and the other end is grounded.

[0014] As a preferred embodiment of this utility model, a pull-down resistor is provided near the digital signal input terminal of the LED light source driver chip. One end of the pull-down resistor is electrically connected to the digital signal input terminal of the LED light source driver chip, and the other end is grounded.

[0015] In a preferred embodiment of this utility model, the TXD pin of the MCU controller is electrically connected to the TXD pin of the memory, and the RXD pin of the MCU controller is electrically connected to the RXD pin of the memory. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the optical parameter monitoring circuit for stage lighting of this utility model;

[0017] Figure 2 This is a schematic diagram of the stage lighting optical parameter monitoring circuit of this utility model installed on the stage lighting;

[0018] Figure 3 This is a circuit diagram showing the connection between the MCU controller and the optical sensor.

[0019] Figure 4 A circuit diagram showing the connection between the MCU controller and the memory;

[0020] Figure 5 This is a circuit diagram showing the connection between the MCU controller and the LED light source driver chip. Detailed Implementation

[0021] The technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0022] This embodiment provides a stage lighting optical parameter monitoring circuit, such as... Figure 1 As shown, the device includes an optical sensor installed next to an LED light source for real-time acquisition of the LED light source's optical parameters, an LED light source driver chip electrically connected to the positive and negative terminals of the LED light source, an MCU controller electrically connected to the output terminal of the optical sensor for acquiring the LED light source's optical parameters acquired by the optical sensor, a serial communication terminal of the MCU controller electrically connected to a memory for the MCU controller to retrieve and store preset LED light source optical parameters based on the LED light source's optical parameters, and a PWM terminal of the MCU controller outputting a digital signal to the digital signal input terminal of the LED light source driver chip based on the LED light source's optical parameters and the preset LED light source optical parameters.

[0023] like Figure 2 As shown, the optical sensor U2 is mounted next to the LED light source 1, as... Figure 3As shown, the MCU controller U1 is electrically connected to the optical sensor U2 via an I2C interface. Specifically, the GPIO1 pin of the MCU controller is connected to the INTN pin of the optical sensor, the GPIO2 pin is connected to the VSYNC pin, the SCL pin is connected to the SCL pin, and the SDA pin is connected to the SDA pin. Resistors R1, R2, and R3 are connected to the INTN, SCL, and SCL pins of the optical sensor U2, respectively, and are electrically connected to a 3.3V power supply. Capacitors C1 and C2 are connected in parallel between the VDD and GND pins of the optical sensor U2. One end of capacitors C1 and C2 is connected to a 1.8V power supply through resistor R4, and the other end is grounded. The MCU controller U1 communicates with the optical sensor U2 via I2C to obtain the optical parameters of the LED light source. Optical sensor U2 is located next to the LED light source and can collect the optical parameters of the LED light source in real time. It then uses I2C communication to feed these parameters back to the MCU controller, allowing the MCU controller to adjust the stage lighting effects based on the collected optical parameters. The MCU controller U1 can be an STM32F103C8T6 microcontroller.

[0024] like Figure 4 As shown, the TXD pin of MCU controller U1 is electrically connected to the TXD pin of memory U4, and the RXD pin of MCU controller U1 is electrically connected to the RXD pin of memory. Memory U4 can be a memory chip of model MF4031-TSSOP20. The NRST pin of memory is electrically connected to the 3.3V power supply through resistor R8. The NRST pin of memory is also grounded through resistor C7. The BOOT pin of memory is grounded through resistor R9. Capacitors C9 and C10 are connected in parallel between the VCC pin and GND pin of memory. One end of capacitors C9 and C10 is electrically connected to the 3.3V power supply, and the other end is grounded. MCU controller U1 通过串 The TXD and RXD ports are used to retrieve the preset LED light source optical parameters stored in memory U4.

[0025] like Figure 5As shown, the LED light source driver chip is a synchronous buck driver chip U3. An N-type power MOSFET Q1 and an inductor are respectively positioned between the GATE pin of the synchronous buck driver chip and the negative terminal of the LED light source. The gate of the N-type power MOSFET is electrically connected to the GATE pin of the synchronous buck driver chip, its source is grounded, and its drain is connected to one end of the inductor L1. The other end of the inductor is electrically connected to the negative terminal of the LED. The drain of the N-type power MOSFET is also electrically connected to the LX pin of the synchronous buck driver chip. A sense resistor is positioned between the SNSH and SNSL pins of the synchronous buck driver chip. One end of the sense resistor is electrically connected to the SNSH pin of the synchronous buck driver chip, and the other end is electrically connected to the SNSL pin of the synchronous buck driver chip and the positive terminal of the LED light source. The sensing resistors include a first resistor RS1, a second resistor RS2, and a third resistor RS3, which are connected in parallel. One end of these three resistors is electrically connected to the SNSH pin of the synchronous buck driver chip, and the other end is electrically connected to the SNSL pin of the synchronous buck driver chip and the positive terminal of the LED light source. Additionally, a filter capacitor C4 is placed between the PWM terminal of the MCU controller and the digital signal input terminal of the LED light source driver chip. One end of the filter capacitor is electrically connected to both the PWM terminal of the MCU controller and the digital signal input terminal of the LED light source driver chip, and the other end is grounded. The filter capacitor C4 effectively removes noise from the PWM output terminal of the MCU controller. Furthermore, a pull-down resistor R5 is placed near the digital signal input terminal of the LED light source driver chip. One end of the pull-down resistor is electrically connected to the digital signal input terminal of the LED light source driver chip, and the other end is grounded. The pull-down resistor R5 is used to stabilize the state of the PWM output terminal of the MCU controller.

[0026] The optical parameters of the LED light source are collected in real time by an optical sensor and transmitted to the MCU controller. The MCU controller retrieves the preset optical parameters of the LED light source based on the optical parameters and compares them. The digital signal output from the PWM terminal passes through the filter capacitor C4 and the pull-up resistor R5 to the digital signal input terminal of the LED light source driver chip. When the positive duty cycle of the digital signal output from the MCU controller's PWM terminal is 0, the LED light source driver chip does not work, the N-type power MOSFET Q1 is turned off, and the LED light source is off. When the positive duty cycle of the digital signal output from the MCU controller's PWM terminal is greater than 0, the LED light source driver chip does not work, the N-type power MOSFET Q1 is turned off, the LED light source is off, and the LED light source driver chip works, driving the N-type power MOSFET Q1 to conduct. The LED light source is quickly switched to the required stage lighting effect according to the positive duty cycle of the digital signal output from the MCU controller's PWM terminal, thereby saving manpower, material resources and time costs for later debugging.

[0027] The PDRV pin of the synchronous buck driver chip is electrically connected to a P-type power MOSFET Q2. The gate of the P-type power MOSFET is electrically connected to the PDRV pin of the synchronous buck driver chip, the source is electrically connected to the positive terminal of the LED light source, and the drain is electrically connected to the negative terminal of the LED light source. The P-type power MOSFET Q2 plays a role in rapid discharge, which helps to reduce LED flicker and improve the smoothness and stability of dimming.

[0028] The above embodiments are only used to illustrate the detailed solution of this utility model. This utility model is not limited to the above detailed solution, that is, it does not mean that this utility model must rely on the above detailed solution to be implemented. Those skilled in the art should understand that any improvement to this utility model, equivalent substitution of the raw materials of this utility model product, addition of auxiliary components, selection of specific methods, etc., all fall within the protection scope and disclosure scope of this utility model.

Claims

1. A stage lighting optical parameter monitoring circuit, characterized in that, The system includes an optical sensor installed next to an LED light source for real-time acquisition of the LED light source's optical parameters, an LED light source driver chip electrically connected to the positive and negative terminals of the LED light source, an MCU controller electrically connected to the output terminal of the optical sensor for acquiring the LED light source's optical parameters acquired by the optical sensor, a serial communication terminal of the MCU controller electrically connected to a memory for the MCU controller to retrieve and store preset LED light source optical parameters based on the LED light source's optical parameters, and a PWM terminal of the MCU controller outputting a digital signal to the digital signal input terminal of the LED light source driver chip based on the LED light source's optical parameters and the preset LED light source optical parameters.

2. The stage lighting optical parameter monitoring circuit according to claim 1, characterized in that, The LED light source driver chip is a synchronous buck driver chip (U3). An N-type power MOSFET (Q1) and an inductor are respectively set between the GATE pin of the synchronous buck driver chip and the negative terminal of the LED light source. The gate of the N-type power MOSFET is electrically connected to the GATE pin of the synchronous buck driver chip, the source is grounded, the drain is connected to one end of the inductor (L1), and the other end of the inductor is electrically connected to the negative terminal of the LED.

3. The stage lighting optical parameter monitoring circuit according to claim 2, characterized in that, The drain of the N-type power MOSFET is also electrically connected to the LX pin of the synchronous buck driver chip.

4. The stage lighting optical parameter monitoring circuit according to claim 2, characterized in that, A sensing resistor is provided between the SNSH and SNSL pins of the synchronous buck driver chip. One end of the sensing resistor is electrically connected to the SNSH pin of the synchronous buck driver chip, and the other end is electrically connected to the SNSL pin of the synchronous buck driver chip and the positive electrode of the LED light source.

5. The stage lighting optical parameter monitoring circuit according to claim 4, characterized in that, The sensing resistors include a first resistor (RS1), a second resistor (RS2), and a third resistor (RS3). The first, second, and third resistors are connected in parallel. One end of the parallel first, second, and third resistors is electrically connected to the SNSH pin of the synchronous buck driver chip, and the other end is electrically connected to the SNSL pin of the synchronous buck driver chip and the positive electrode of the LED light source.

6. The stage lighting optical parameter monitoring circuit according to claim 4, characterized in that, The PDRV pin of the synchronous buck driver chip is electrically connected to a P-type power MOSFET (Q2). The gate of the P-type power MOSFET is electrically connected to the PDRV pin of the synchronous buck driver chip, the source is electrically connected to the positive terminal of the LED light source, and the drain is electrically connected to the negative terminal of the LED light source.

7. The stage lighting optical parameter monitoring circuit according to claim 1, characterized in that, The MCU controller (U1) is electrically connected to the optical sensor (U2) via an I2C interface. Specifically, the GPIO1 pin of the MCU controller is electrically connected to the INTN pin of the optical sensor, the GPIO2 pin of the MCU controller is electrically connected to the VSYNC pin of the optical sensor, the SCL pin of the MCU controller is electrically connected to the SCL pin of the optical sensor, and the SDA pin of the MCU controller is electrically connected to the SDA pin of the optical sensor.

8. The stage lighting optical parameter monitoring circuit according to claim 1, characterized in that, A filter capacitor (C4) is provided between the PWM terminal of the MCU controller and the digital signal input terminal of the LED light source driver chip. One end of the filter capacitor is electrically connected to the PWM terminal of the MCU controller and the digital signal input terminal of the LED light source driver chip, and the other end is grounded.

9. The stage lighting optical parameter monitoring circuit according to claim 1, characterized in that, A pull-down resistor (R5) is provided near the digital signal input terminal of the LED light source driver chip. One end of the pull-down resistor is electrically connected to the digital signal input terminal of the LED light source driver chip, and the other end is grounded.

10. The stage lighting optical parameter monitoring circuit according to claim 1, characterized in that, The TXD pin of the MCU controller is electrically connected to the TXD pin of the memory (U4), and the RXD pin of the MCU controller is electrically connected to the RXD pin of the memory.

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