Fantastic color lamp display device

Abstract

The utility model belongs to the technical field of display equipment, and mainly relates to a fantasy color lamp display device, which comprises a main control module, namely a fantasy color lamp test circuit connected with the main control module, the fantasy color lamp test circuit comprises at least two fantasy color lamps, and the fantasy color lamps are in cascade connection with the adjacent fantasy color lamps; the master control module comprises a micro-control processor, and a clock unit and a display unit which are connected with the micro-control processor; the fantasy color lamp test circuit inputs the driving signal group output by the micro-control processor and locks each control signal in different fantasy color lamps, and the display unit displays the color corresponding to each fantasy color lamp according to the driving signal group; therefore, according to the visual fantasy color lamp display device provided by the invention, the visual degree and the interaction convenience of fantasy color lamp display are improved, and the detection efficiency and the detection accuracy are further improved.

Description

Technical Field

[0001] This utility model belongs to the field of display equipment technology, and specifically relates to a color-changing light display device. Background Technology

[0002] In recent years, with the rapid development of LED display technology, RGB LED lights (such as integrated RGB LED beads like WS2812 and SK6812) have been widely used in smart lighting, advertising displays, stage lighting, wearable devices, holiday decorations, gaming peripherals, and architectural beautification due to their advantages such as single-wire control, rich colors, fast response, and flexible series connection. However, before RGB LED lights are widely used in end products, especially in the mass production of LED strips and LED boards, how to quickly and efficiently perform power-on testing, communication integrity verification, and color control consistency testing on each LED bead has become a key factor restricting product yield and quality.

[0003] In the large-scale application of RGB LEDs, it is crucial to verify whether the LEDs can receive data correctly. This involves verifying successful communication between the LEDs and between the LEDs and the microcontroller, thereby understanding the completeness of data transmission between the LEDs. Currently, the inspection of RGB LEDs is mainly conducted manually or using machine vision devices. In manual inspection, operators manually trigger test programs and observe the status of the LEDs sequentially. However, this method is highly dependent on subjective judgment and is unsuitable for mass production lines. While using a camera + image recognition system to capture images of the LED strips and analyze the lighting effect through algorithms offers higher accuracy and better results than manual inspection, this method suffers from significant ambient light interference and requires sophisticated recognition algorithms, making it particularly difficult to locate individual LED anomalies in high-density LED arrays.

[0004] Therefore, there is an urgent need to develop a color light display device that can simultaneously detect color lights, in order to solve the technical defects in the above-mentioned technology. Utility Model Content

[0005] The purpose of this utility model is to provide a visual RGB lighting display device that addresses the shortcomings of existing technologies, thereby improving the visualization and interactivity of the RGB lighting display, and thus enhancing detection efficiency and accuracy.

[0006] To achieve the above objectives, this application implements the following technical solution:

[0007] A color-changing light display device includes a main control module and a color-changing light test circuit connected to the main control module; the color-changing light test circuit includes at least two color-changing lights, and the color-changing lights are cascaded with adjacent color-changing lights; the main control module includes a microcontroller and a clock unit and a display unit connected to the microcontroller; the color-changing light test circuit inputs a group of drive signals output by the microcontroller and latches each control signal into a different color-changing light, and the display unit displays the color corresponding to each color-changing light according to the group of drive signals.

[0008] The above technical solution produces the following technical effects:

[0009] The RGB LED display device of this application ensures the stability and consistency of the RGB LED color display through timing control, thereby improving the overall display effect. Whether a single LED is lit or multiple LEDs are combined, it can present a delicate and uniform color transition, bringing users a richer visual experience. Furthermore, the connection between the main control module of the display device and the RGB LED test circuit is stable and reliable, reducing the failure rate caused by poor connections. At the same time, the introduction of the display unit makes the testing process more intuitive; users can quickly understand the current test status by observing the displayed content, thus improving testing efficiency.

[0010] Secondly, the technical solution of this application also has good scalability. The main control module can preset multiple detection modes, which users can flexibly select according to actual needs. Furthermore, this application can meet the needs of different application scenarios.

[0011] As a further improvement to the color-changing light display device of this application, the color-changing light includes a data input terminal DIN and a data output terminal DOU. A microcontroller or the data output terminal DOU of the color-changing light adjacent to the color-changing light inputs a group of drive signals to the data input terminal DIN of the color-changing light.

[0012] As a further improvement to the color light display device of this application, the color light is provided with a latch, which latches the driving signal in the driving signal group that matches the color light, and outputs the remaining signal group through the data output terminal DOU.

[0013] As a further improvement to the color-changing light display device of this application, the power supply terminal VDD of the color-changing light is connected to a 5V voltage source.

[0014] As a further improvement to the color-changing light display device of this application, the driving signal is an RGB driving signal.

[0015] As a further improvement to the color-changing light display device of this application, the number of color-changing lights is 4, and the driving signal group is a signal group containing 4 groups of RGB driving signals.

[0016] As a further improvement to the color light display device of this application, the clock unit includes a crystal oscillator X2 and a load capacitor disposed at both ends of the crystal oscillator X2, and the crystal oscillator X2 outputs a 25MHz oscillation signal.

[0017] As a further improvement to the color-changing light display device of this application, the load capacitor includes load capacitor C6 and load capacitor C8, and the capacitance values ​​of load capacitor C6 and load capacitor C8 satisfy: 12pF-22pF.

[0018] As a further improvement to the color-changing light display device of this application, the display unit is an LCD display module.

[0019] As a further improvement to the color-changing light display device of this application, the color-changing light used is a WS2812 LED bead. Attached Figure Description

[0020] The accompanying drawings, which are included to provide a further understanding of the present invention and constitute a part of this invention, illustrate exemplary embodiments of the present invention and are used to explain the present invention, but do not constitute an undue limitation of the present invention. In the drawings:

[0021] Figure 1 This is a schematic diagram of the structure of Embodiment 1 of this utility model;

[0022] Figure 2 This is a schematic diagram of the main control module in Embodiment 1 of this utility model;

[0023] Figure 3 This is a circuit diagram of the RGB lighting test circuit in Embodiment 1 of this utility model;

[0024] Figure 4 This is a data structure diagram of the RGB lighting in Embodiment 2 of this utility model;

[0025] Figure 5 This is a timing waveform diagram of the RGB lighting in Embodiment 2 of this utility model;

[0026] Figure 6 This is a schematic diagram of the data transmission method for cascading RGB lights in Embodiment 2 of this utility model;

[0027] Figure 7 This is a circuit diagram of the microcontroller processor in Embodiment 3 of this utility model;

[0028] in:

[0029] 1-Main control module;

[0030] 11-Microcontroller;

[0031] 12-Clock Unit;

[0032] 13-Display unit;

[0033] 21-Colorful Lights. Detailed Implementation

[0034] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of them. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application. Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the art to which this application pertains. The terminology used in the specification of this application is for the purpose of describing specific embodiments only and is not intended to limit this application.

[0035] In the description of this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between 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.

[0036] Although this application discloses preferred embodiments as described above, it is not intended to limit the claims. Any person skilled in the art can make several possible changes and modifications without departing from the concept of this application. Therefore, the scope of protection of this application should be determined by the scope defined in the claims of this application.

[0037] It is known that RGB LEDs integrate a constant current driver and a PWM controller, enabling them to receive multiple signal groups containing 24-bit control signals (usually in GRB format) through a single data input terminal. These signals sequentially control the duty cycles of the red, green, and blue sub-LED channels, thus achieving mixed display of any color. More importantly, RGB LEDs possess excellent cascading characteristics. Through the forwarding relationship between data input (DIN) and data output (DOU), multiple LEDs can be controlled in series, forming complex display systems such as programmable LED strips and LED arrays.

[0038] The present invention will be further described in detail below with reference to specific embodiments, but the embodiments of the present invention are not limited thereto. Detailed Implementation

[0040] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of them. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application. Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the art to which this application pertains. The terminology used in the specification of this application is for the purpose of describing specific embodiments only and is not intended to limit this application.

[0041] In the description of this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between 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.

[0042] Although this application discloses preferred embodiments as described above, it is not intended to limit the claims. Any person skilled in the art can make several possible changes and modifications without departing from the concept of this application. Therefore, the scope of protection of this application should be determined by the scope defined in the claims of this application.

[0043] It is known that the RGB LED 21 integrates a constant current driver and a PWM controller. It can receive multiple signal groups containing 24-bit control signals (typically in GRB format) through a single data input terminal and sequentially control the duty cycles of the red, green, and blue sub-LED channels, thereby achieving mixed display of any color. More importantly, the RGB LED 21 has excellent cascading characteristics. Through the forwarding relationship between the data input (DIN) and data output (DOU), it can achieve series control of multiple LEDs, thus forming complex display systems such as programmable LED strips and LED arrays.

[0044] The present invention will be further described in detail below with reference to specific embodiments, but the embodiments of the present invention are not limited thereto.

[0045] Implementation Method 1

[0046] like Figure 1-3As shown, in order to solve the problem in the prior art that the working status of each LED in the RGB LED 21 cannot be determined by visualizing the RGB LED 21, this application improves the RGB LED 21 display device. The RGB LED 21 display device of this application includes a main control module 1, i.e., an RGB LED 21 test circuit connected to the main control module 1; the RGB LED 21 test circuit includes at least two RGB LEDs 21, and the RGB LEDs 21 are cascaded with adjacent RGB LEDs 21; the main control module 1 includes a microcontroller 11 and a clock unit 12 and a display unit 13 connected to the microcontroller 11; the RGB LED 21 test circuit inputs the drive signal group output by the microcontroller 11 and latches each control signal into a different RGB LED 21, and the display unit 13 displays the color corresponding to each RGB LED 21 according to the drive signal group.

[0047] Specifically, the device of this application includes a main control module 1 and a test circuit for the RGB lighting 21 connected thereto;

[0048] The main control module 1 includes a microcontroller 11 (MCU), a clock unit 12, and a display unit 13. The test circuit for the RGB LED 21 consists of two or more LEDs cascaded in DIN-DOU order. The display unit 13 (such as an LCD screen) indicates the current test mode, LED number, status, etc. The microcontroller 11, acting as the main controller, can preset various detection modes, such as "single LED illumination," "sequential LED flow," "segmented synchronous illumination," and "alternating yellow and white flashing." Each LED has different latched data, making it easy to observe whether the actual displayed color matches the preset. If an LED or the preceding stage fails, the subsequent stage cannot be illuminated, allowing for quick location of the fault.

[0049] Furthermore, the display unit 13 provided in this application is an LCD display module, which is designed to synchronously display the current test progress, indicator lights, and status prompts. In addition, as an interactive display unit 13, it can be further combined with UI slider selection, infrared remote control input, and other mechanisms to quickly switch test modes, exit the process, and record anomalies, greatly improving the visualization and interactive convenience of the testing process.

[0050] Implementation Method 2

[0051] like Figure 1-6 As shown, unlike Embodiment 1, in order to further demonstrate the working principle of the RGB LED display device 21 of this application, as follows: Figure 4The data transmission structure shown is a 24-bit control signal. Specifically, this 24-bit control signal transmits 8 bits of green luminance data (G7-G0) and 8 bits of blue luminance data (B7-B0) sequentially, with the most significant bit first. Each control signal is transmitted using a single-wire pulse-width modulation (PWM-like encoding), and the duration of the high and low levels represents logic "1" or "0". The specific implementation of the high and low levels is as follows... Figure 5 As shown. The reset code represents the refresh step after all the RGB lights 21 have completed one flash.

[0052] like Figure 3 As shown in the specific implementation of this application, the test circuit for the RGB LED 21 consists of four cascaded RGB LEDs 21. Each RGB LED 21 includes a data input terminal DIN and a data output terminal DOU. The microcontroller 11 or the data output terminal DOU of an adjacent RGB LED 21 inputs a group of drive signals to the data input terminal DIN of the RGB LED 21. The RGB LEDs 21 are connected in a cascaded manner. After receiving 24-bit data, each LED automatically latches the current data through a latch and forwards subsequent data to the next LED. By sequentially sending N groups of 24-bit control signals, the main control module 1 can independently control the N RGB LEDs 21. The control signals are sequentially transmitted to the DIN pin of each LED via a single-wire serial connection. After being buffered by an internal data shift register, the corresponding color is modulated and output by the PWM driver. No valid data is output at the end of the data link, forming a closed control chain.

[0053] Furthermore, this application utilizes this 24-bit structure as a basic control unit to enable each LED to display a different color, and uses the display unit 13 to compare whether the actual color of the LED matches the preset color, thereby achieving complete detection of whether the LED can correctly parse data, receive data, cascade transmission, and ultimately drive light emission, thus improving the accuracy and efficiency of production testing.

[0054] like Figure 4 As shown, the data transmission method of the color-changing lamp 21 display device described in this application adopts a single-wire serial frame-by-frame transmission mechanism. In this mechanism, the microcontroller (MCU) sequentially sends several 24-bit control frames through a GPIO output pin (such as the PC13 pin provided by the microcontroller processor 11 MCU in this application). Each 24-bit control frame corresponds to controlling the display color of one color-changing lamp 21. The structure of the 24-bit control frame is as follows: Figure 4 As shown. For example, green channel data satisfies: G7-G0 and is transmitted in high-order order.

[0055] like Figure 6As shown, within a complete data refresh cycle, the MCU sequentially sends frame 1, frame 2, frame 3, and so on up to frame N, each frame being 24 bits. The first LED (D1) receives the data of frame 1 and then transmits the remaining data to D2; the second LED receives the data of frame 2 and continues forwarding the subsequent data, and so on. After each LED parses its frame, its internal latch uses that frame to control the RGB three-color LED channel using PWM. After all data frames have been transmitted, the microcontroller 11 outputs a reset signal (RESET) to the bus with a low-level hold time of not less than 280μs, instructing all LEDs to simultaneously latch the current display data and update the visible colors. Furthermore, in the diagram, the power supply terminal VDD of the RGB LED 21 is connected to a 5V voltage source and is separated from the microcontroller 11.

[0056] like Figure 5 As shown, to achieve correct identification of data logic "0" and "1", the transmission of each bit of data is controlled by pulse width encoding with a fixed timing sequence. The specific timing parameters are listed in the table below:

[0057]

[0058] Table 1

[0059] The encoding format for logic "0" is "short high level + long low level", while the encoding format for logic "1" is "long high level + short low level", with a total duration of approximately 1.25μs for each bit. To achieve this precise timing control, this application drives the GPIO port through clock unit 12 and uses a custom nanosecond-level delay function (such as delay_5ns_zy()) to control the duration of the output high and low levels, thereby generating data pulses conforming to the WS2812 protocol on pins such as PC13.

[0060] Implementation Method 3

[0061] As shown in Figures 1-7, unlike Embodiment 2, this application improves the clock unit 12 that drives the microcontroller 11 to generate clock signals in order to further demonstrate the accuracy of timing control for display devices such as iridescent displays. Figure 7 As shown, when the main control module 1 of this application outputs a 24-bit control signal, it first generates a precise time base through an internal high-speed clock (specifically obtained by multiplying an external 25MHz crystal oscillator X1), and then through... Figure 7 The high-low switching of the GPIO pin of PC13 in the MCU precisely controls the timing of single-bit data transmission, thereby completing data encoding conforming to the WS2812 communication protocol. Each transmission of a complete 24-bit data set controls the display color of one RGB LED 21, with the specific color determined by the duty cycle of the three GRB channels.

[0062] Specifically, such as Figure 7 As shown, the clock unit 12 of this application includes a crystal oscillator X2 and load capacitors disposed across the two ends of the crystal oscillator X2. The crystal oscillator X2 outputs a 25MHz oscillation signal. The load capacitors include load capacitor C6 and load capacitor C8, and the capacitance values ​​of load capacitor C6 and load capacitor C8 satisfy the condition: 12pF-22pF.

[0063] In the specific implementation, the preferred capacitance values ​​for both load capacitors C6 and C8 are 22pF. The crystal oscillator X2 is a 25MHz quartz crystal oscillator designed to provide a reference frequency input. The load capacitors C6 and C8, in conjunction with the crystal, stabilize the oscillation frequency at 25MHz, preventing drift and further ensuring the stability of the timing signals generated within the microcontroller 11.

[0064] Other aspects that are the same as in Implementation Method 1 will not be described again in this implementation method.

[0065] The above are merely preferred embodiments of this application and are not intended to limit this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A color-changing light display device, characterized in that, Includes a main control module (1), namely a color light test circuit connected to the main control module (1); The color light test circuit includes at least two color lights (21), and the color lights (21) are cascaded with adjacent color lights (21); The main control module (1) includes a microcontroller (11), a clock unit (12) and a display unit (13) connected to the microcontroller (11); The test circuit for the color-changing light receives the drive signal group output by the microcontroller (11) and locks each control signal into a different color-changing light (21). The display unit (13) displays the color corresponding to each color-changing light (21) according to the drive signal group.

2. The color-changing light display device according to claim 1, characterized in that, The RGB LED (21) includes a data input terminal DIN and a data output terminal DOU. The microcontroller (11) or the data output terminal DOU of the RGB LED (21) adjacent to the RGB LED (21) inputs a group of drive signals to the data input terminal DIN of the RGB LED (21).

3. The color-changing light display device according to claim 2, characterized in that, The RGB LED (21) is equipped with a latch, which latches the drive signal in the drive signal group that matches the RGB LED (21) and outputs the remaining signal group through the data output terminal DOU.

4. The color-changing light display device according to claim 1, characterized in that, The power supply terminal VDD of the RGB LED (21) is connected to a 5V voltage source.

5. A color-changing light display device according to claim 1, characterized in that, The driving signal is an RGB driving signal.

6. A color-changing light display device according to claim 1, characterized in that, The number of the RGB LEDs (21) is 4, and the driving signal group is a signal group containing 4 groups of RGB driving signals.

7. A color-changing light display device according to claim 1, characterized in that, The clock unit (12) includes a crystal oscillator X2 and a load capacitor disposed at both ends of the crystal oscillator X2, and the crystal oscillator X2 outputs a 25MHz oscillation signal.

8. A color-changing light display device according to claim 7, characterized in that, The load capacitors include load capacitor C6 and load capacitor C8, and the capacitance values ​​of load capacitor C6 and load capacitor C8 satisfy the condition: 12pF-22pF.

9. A color-changing light display device according to claim 1, characterized in that, The display unit (13) is an LCD display module.

10. A color-changing light display device according to claim 1, characterized in that, The color lamp (21) is a WS2812 LED.

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