Power supply substrate, functional display module and modular display system

Abstract

Power supply substrate, characterized in that it comprises: a substrate body; a multitude of power supply interface units arranged on the substrate body in a matrix configuration; and a DC low-voltage power supply circuit; wherein the DC low-voltage power supply circuit is designed to provide a DC low voltage of not more than 60 V to the plurality of power supply interface units; wherein the power supply substrate does not include a data command generation and transmission circuit designed to control a display content of an external display module.

Description

Technical field

[0001] The present invention relates to the field of electrical lighting and display devices, in particular a modular hardware component for constructing a dynamic display system, and more precisely a substrate that provides a safe DC low-voltage power supply, a plug-and-play self-intelligent functional display module and a modular display system consisting of the power supply and the module. State of the art

[0002] In areas such as commercial displays, art installations, home gatherings, and smart lighting, there is a growing demand for dynamic lighting systems capable of flexible changes and adaptation to multiple scenarios. However, all current mainstream technology solutions have obvious limitations: 1. Traditional LED screens

[0003] Such systems depend on a central control unit and complex software, are expensive, and typically have a rigid planar structure with a fixed shape. Their display content is limited by a rigid pixel grid, incapable of achieving a natural blending and diffusion of light. More importantly, any content change requires professional programming, which fails to meet users' needs for quick and intuitive reconfiguration. 2. Modular power supply devices (e.g., multi-function power strips)

[0004] Although such products provide modular interfaces, their functional modules (e.g., USB chargers, nightlights) operate independently, share only a power source, and cannot work in visual coordination to create a unified dynamic display. Furthermore, they supply high-voltage alternating current, which poses safety risks, and are not originally designed for cooperative display.

[0005] Therefore, the market urgently needs an innovative solution that balances flexibility, security, ease of use, and collaborative display capabilities, enabling users to safely and cost-effectively create and modify complex dynamic lighting effects through simple and intuitive physical operations. Current technology does not offer this. The invention and its advantages

[0006] One objective of the present invention is to provide an innovative modular display system and its core components, with the aim of systematically solving the technical bottlenecks that commonly exist in existing dynamic lighting technology solutions, such as complex operation, high costs, rigid form, high safety hurdles and the inability to achieve intuitive hardware-based content reconfiguration.

[0007] To achieve the above objective, the present invention proposes a novel architecture based on the concepts of "decentralized intelligence" and "hardware-based spatial programming." The core idea of ​​this architecture is to construct a "non-intelligent" universal power supply platform and to define compatible functional display modules with different levels of intelligence. Based on the above, the technical solution of the present invention is embodied mainly in the following three core components: First, a power supply substrate is provided.

[0008] The power supply substrate forms the energy and structural basis of the entire system. The power supply substrate primarily comprises: a substrate body; a multitude of power supply interface units arranged on a surface of the substrate body in a precise, regular matrix pattern; and a low-voltage DC power supply circuit. The low-voltage DC power supply circuit is designed to provide all power supply interface units with safe, low-voltage DC electrical power, not exceeding 60 V. Crucially, the internal circuit design of the power supply substrate prevents it from generating or transmitting any data commands for controlling the display content of an external display module, thus fundamentally establishing its role as a "passive platform."

[0009] For optimization and refinement, the power supply substrate can also integrate one or more of the following designs:

[0010] The DC low-voltage power supply circuit can include a built-in AC-DC conversion module designed for direct connection to and conversion of AC mains power.

[0011] In some implementations, the power supply interface units can be designed as electrical connectors with a self-locking function to increase connection stability. Of course, depending on the application scenario and cost considerations, conventional electrical connectors without a self-locking function can also be used.

[0012] A connection mechanism can be provided on a side edge of the substrate body to enable a seamless mechanical and electrical connection of several identical substrates, thereby achieving an extension of the display area.

[0013] The center points of the power supply interface units can be arranged strictly according to a regular rectangular grid or an equilateral triangular grid, providing a coordinate basis for precise positioning.

[0014] Protective circuits such as overcurrent, overvoltage and reverse polarity protection can be added to the DC low-voltage power supply circuit to improve the safety and reliability of the entire power supply system.

[0015] Secondly, a functional display module is provided.

[0016] The present invention defines a functional display module for use in conjunction with the aforementioned power supply substrate and offers two levels of specific implementation schemes based on its intelligence and functional complexity:

[0017] Basic Functional Module: A functional display module for use in conjunction with the aforementioned power supply substrate. Its core lies in providing basic lighting functionality, comprising: a housing; a light source configured for operation in a low-voltage DC environment and its supporting driver circuitry, arranged within the housing; and a passive power supply interface attached to the housing and designed to connect to the power supply interface units of the power supply substrate.

[0018] Intelligent Functional Module: Building upon the physical architecture of the basic functional module, the present invention further provides a functionally enhanced intelligent display module. Based on the aforementioned module, the functional display module further comprises: a control unit that stores a preset display program. The control unit is designed to immediately and autonomously execute the internal preset display program upon receiving power from the power supply substrate via the passive power supply interface, thereby driving the light source to produce a specific, dynamically variable lighting effect, the entire process being independent of external control signals.

[0019] To refine the aforementioned functional display module, the functional display module may also include one or more of the following designs:

[0020] The electrical design of the passive power supply interface can be such that it includes only power supply pins necessary for transmitting electrical energy, without any dedicated pins for data communication. This ensures the module's independence and the system's decentralized architecture at the physical interface level.

[0021] Thirdly, a modular display system will be provided.

[0022] The system consists of at least one of the aforementioned power supply substrates and a multitude of the aforementioned functional display modules (including basic functional modules and / or intelligent functional modules) plugged into it. Its core operating mode is as follows: Each functional display module is plugged into a power supply interface unit of the power supply substrate via its passive power supply interface, thereby establishing a physical and electrical connection.

[0023] Each of the multiple functional display modules draws power from the passive power supply interface of the multiple functional display modules and, in response to the power supply substrate being energized, independently executes an internal preset display program of the multiple functional display modules to drive the light source to produce a corresponding lighting effect; The precise positioning and distribution of each module in physical space forms the display unit of the system.

[0024] The display logic and content of the system are directly determined by the type of modules inserted, their internal programs, and their specific distribution on the substrate's coordinate grid. Crucially, the modules must be able to achieve macroscopically uniform visual coordination without data communication with each other, primarily by relying on one or more of the following technical mechanisms: (1) Period reference synchronization: The modules' preset programs use the same or integer multiples of time period references, which naturally aligns dynamic effects in the time dimension; (2) Power-on synchronization: When all modules are powered on simultaneously, they start synchronously with program execution from a reset state, thus achieving initial phase consistency; (3) Environment sensing synchronization: Some modules have built-in environment sensors, such as light sensors, and adapt their own programs by sensing the light states of surrounding modules.

[0025] These mechanisms allow the light emitted by each independently operating module to be visually coordinated and mixed, thus presenting a macroscopically uniform overall visual display effect on the display surface formed by the physical positions of the modules, and the entire process does not require a central control unit.

[0026] In comparison to the prior art, the technical solution provided by the present invention brings the following multifaceted, groundbreaking advantageous effects: 1. Personal safety and direct interaction

[0027] The system operates with a safety extra-low voltage (SLV) circuit, essentially eliminating the risk of electric shock and allowing users to safely perform hot-swap operations with their bare hands. This removes the safety barrier associated with using professional lighting systems, achieving an ease of interaction comparable to consumer electronics. 2. Extreme flexibility through “hardware-based programming”

[0028] The present invention establishes a new paradigm of "hardware-based spatial programming." Users require no software knowledge; their creation process is similar to assembling physical modules: By placing functional display modules with different "roles" (static lighting effects or preset dynamic programs) at specific coordinates on the power supply substrate "canvas," the display content is directly defined. Reconfiguring the overall effect can be completed within minutes by physically replacing the modules. This simplifies the technical transition from a professional software workflow to intuitive physical operation and significantly lowers the barriers to use and creation for dynamic lighting systems. 3. Breakthrough in optical field fusion and visual representation

[0029] On an optical level, the present invention replaces traditional "discrete point light sources" with a "merging of area light sources." The light field emitted by each functional display module can naturally overlap and blend with neighboring light fields, thereby eliminating the unpleasant pixelation effect. It enables truly smooth, continuous, seamless color gradients and light-shadow transitions, thus providing a more artistically appealing and immersive visual experience. 4. Ability to construct a true three-dimensional light field

[0030] The present invention breaks with the entrenched notion that display media should be planar. By using specially shaped modules, adjustable optical axes, and spatial three-dimensional arrangements, multiple independent light fields can be freely organized, intertwined, and projected in three-dimensional space. This creates a spatial light sculpture with a true sense of volume, depth, and dynamic change, opening up a new dimension of expression for spatial light and shadow art. 5. High reliability, easy scalability and excellent cost efficiency

[0031] High reliability: The distributed architecture has no central point of failure and simplifies maintenance.

[0032] Easy scalability: The connection mechanisms on the side edges of the substrates allow for seamless, linear and cost-effective expansion of the display area.

[0033] Improved cost efficiency: The "non-intelligent" substrate reduces the cost of the base platform. Users can choose basic modules for simple effects or intelligent modules for complex dynamic effects, depending on their needs, supporting flexible, phased investments. Total operating costs are significantly lower than those of traditional high-resolution LED displays.

[0034] In summary, the present invention, through a complete series of hardware architecture innovations, not only resolves many pain points of existing technologies but also paves the way for a safe, flexible, high-performance, and easily accessible method for creating and displaying dynamic light and shadow effects. It demonstrates significant technological advancement and possesses broad industrial application value. Brief description of the drawings Fig. Figure 1 is a top view of the structure of an embodiment of the power supply substrate according to the present invention; Fig. Figure 2 is a block diagram showing the hierarchy and interface relationships of the DC low-voltage power supply circuit according to the present invention; Fig. 3a and Fig. Figure 3b shows schematic diagrams illustrating the connection between a power supply interface unit and a passive power supply interface according to the present invention; Fig. 3a is a diagram showing the electrical connection relationship; Fig. 3b is a schematic diagram showing the mechanical connection relationship; Fig. Figure 4 is an enlarged schematic view of a barrel connector power supply interface unit according to an embodiment of the present invention; Fig. Figures 5a to 5d are schematic diagrams showing the structure and assembly of a connection mechanism according to an embodiment of the present invention; Fig. 5a is a perspective view of a connection mechanism 104; Fig. 5b is a top view of the connection mechanism 104; Fig. Figure 5c is a schematic diagram showing one way of assembling three power supply substrates via the connection mechanism 104; Fig. Figure 5d is a schematic diagram showing one way of assembling six power supply substrates via the connection mechanism 104; Fig. Figure 6 is a partially schematic structural view of a snap reinforcement structure of an engagement groove and an engagement strip in the connection mechanism according to the present invention; Fig. Figure 7 is a top view of the structure of an embodiment of the power supply substrate according to the present invention, wherein USB interfaces integrated into side walls of the power supply substrate are visible; Fig. Figure 8 is a schematic structural view of a functional display module according to the present invention; Fig. Figure 9 is a schematic overall three-dimensional assembly view of an embodiment of the modular display system according to the present invention; Fig. Figure 10 is a schematic diagram illustrating the principle of “spatial positioning equals programming” according to the present invention; Fig. 11a and Fig. Figure 11b shows flowcharts illustrating the operating modes of the modular display system according to the present invention; Fig. Figure 11a is a flowchart of a hot-plug dynamic reconfiguration mode; Fig. 11b is a flowchart of an integrated startup mode; Fig. Figure 12 is a schematic diagram of a scenario in which an electronic photo frame module, described in embodiment IV of the present invention, is applied to a power supply substrate. Example(s) of implementation

[0035] To clarify the objectives, technical solutions, and creative advantages of the present invention, the three core products of the present invention and their inherent application methods are explained in detail below in conjunction with the accompanying drawings by means of several detailed embodiments. These embodiments are intended to provide specific, implementable details but must not be interpreted as limiting the scope of protection of the present invention. Example I Detailed design of the power supply substrate, the functional display module and the modular display system 1. Design of the power supply substrate 100:

[0036] As in the Fig. As shown in Figures 1-2, the substrate body 101 of the power supply substrate 100 is made of high-strength, flame-retardant polycarbonate (PC) or an aluminum alloy plate, combining structural strength, electrical insulation, and lightweight properties. Its standard size can be designed as 300 mm x 300 mm square with a thickness of 15 mm, thus balancing load-bearing capacity and aesthetics.

[0037] The inner cavity of the substrate body 101 encloses the complete power conversion system. At the front end is a safety-compliant AC-DC switching power supply module with a globally universal 100-240 V AC wide-range input voltage and a uniform, stable DC safety output voltage of no more than 60 V DC / 5 A. This power supply module features comprehensive overcurrent, overvoltage, short-circuit, and overtemperature protection. After the safe DC output, the power enters a distributed power distribution network formed by precision copper foil conductors. This network uses a star or mesh topology to ensure that even remote interface units receive a stable voltage with minimal voltage drop.At critical nodes in the power distribution network, additional self-resetting fuses and blocking Schottky diodes can be integrated to form multiple levels of protection.

[0038] To facilitate installation and mounting, the substrate body 101 is provided with through-holes 106 that extend from the front to the rear. In some implementations, the through-holes 106 are located at the geometric center of the power supply substrate. During installation, screws are configured to pass through these through-holes to attach the substrate directly to a wall, bracket, or frame. This through-hole design provides a stable mechanical connection and facilitates assembly and disassembly from the front.

[0039] Furthermore, at least one corner section of the front of the substrate body 101 integrates a push-button switch 107 to facilitate user control of the power supply to the entire substrate. The mains isolator 107 is connected in series in an input or output loop of the DC low-voltage power supply circuit 103 and serves as the system's main mains isolator for manual control of the power output to all power supply interface units 102, thus enabling simple and safe management of the power supply's on and off states for the entire board.

[0040] To further enhance the convenience of system power supply management, an infrared sensing / receiving hole 108 is provided on a surface of the power supply substrate 100. The receiving hole 108 is electrically connected to an infrared receiving and control circuit integrated within the substrate body and is specifically designed to receive control signals directed at the power supply substrate itself from a suitable infrared remote control. Users can wirelessly control the on / off state of the DC low-voltage power supply circuit 103 of the power supply substrate 100 via the infrared remote control. This control only affects the power supply state of the substrate and does not send any data commands to the functional display modules 200; the display behavior of the functional display modules 200 remains completely autonomous, determined by their internal preset programs.

[0041] The surface of the substrate body forms a matrix of 10 rows x 10 columns, totaling 100 power supply interface units 102, by precision injection molding or CNC machining. A center point of each power supply interface unit 112 is located strictly at an intersection of a rectangular grid with a pitch of 20 mm, with a positioning accuracy of better than ±0.1 mm.

[0042] A main body 101 of the device is provided with a plurality of power supply interface units 102 configured for the detachable connection of the functional display modules 200. A core of each interface unit 102 is a DC power supply socket configured to supply power to the functional display modules 200 and to establish a physical connection.

[0043] Fig. 3a and Fig. Figure 3b shows schematic diagrams of the connection between a power supply interface unit and a passive power supply interface according to the present invention;

[0044] The connector between the power supply interface unit 102 and the passive power supply interface 204 of the functional display module 200 must provide a reliable mechanical fixation for the module in addition to forming a current path.

[0045] Depending on different application requirements, the power supply interface unit 102 can be implemented in various ways.

[0046] As in Fig. As shown in Figure 4, the power supply interface unit 102 can use a standard barrel connector (DC circular current connector) as a basic, cost-optimized implementation. In this case, the passive power supply interface 204 of the functional display module 200 is the corresponding DC connector, and both rely on radial friction between the connector's outer sheath and the elastic contact inside the socket for fixation and conduction. This solution has a simple structure and low cost, making it suitable for static installation scenarios with low connection reliability requirements and in stable environments.

[0047] As a preferred and more reliable implementation of the present invention, to further increase connection stability, in particular to prevent the module from detaching in application scenarios involving vibration, device movement, or accidental external tensile forces, the interface unit 102 is preferably designed as an electrical connector with a mechanical self-locking function. A core electrical part of this self-locking socket can use a spring-loaded electrical connector (POGO-PIN probe) or an elastic tuning fork structure as the outer ring negative contact with a central cylindrical positive contact. The self-locking function is implemented by integrating an additional mechanical structure around the periphery of the socket, for example:

[0048] Rotary locking ring type: The socket housing integrates a rotatable locking ring, and the corresponding module connector is designed with a locking groove. Once the module is inserted, rotating the locking ring by a specific angle (e.g., 90°) causes the ring to engage in the locking groove, thus achieving the locking mechanism.

[0049] Push-pull sliding bolt type: The socket integrates a sliding lock with a built-in spring. Once the module is fully inserted, the external locking bolt is pushed into the locked position to secure it.

[0050] When the passive power supply interface 204 of the functional display module 200 is fully inserted into the interface unit 102 and the locking operation described above is complete, a distinct "click" sound or clear tactile feedback is usually present, indicating that the mechanical lock is engaged. In this locked state, the module cannot be removed by axial pulling alone; a specific reverse unlocking operation (such as rotating the locking ring in the opposite direction or pressing a release latch) must be performed to disconnect it.

[0051] At least one side edge of the substrate body 101 (typically all four sides to facilitate multidirectional expansion) has precision-machined or provided connection mechanisms 104. This mechanism comprises two core parts: an electrical connection part and a mechanical connection part, ensuring that the connection process is simple, precise, and reliable.

[0052] Mechanical positioning and pre-fixing component: To ensure that the matrix-shaped power supply interface units 102 are precisely aligned on the surfaces of multiple power supply substrates 100 after connection and form a seamless coordinate plane, the connection mechanism 104 includes a set of high-precision mechanical positioning components. As shown in the Fig. 5a and Fig. As shown in Figure 5b, a groove 1041 is specifically provided on a side edge of the substrate body. The groove 1041 has a structural feature of a narrow opening and a wide cavity. A matching I-shaped engagement strip 1042 is provided at a corresponding position on an adjacent side edge. Both ends of the engagement strip 1042 are provided with enlarged ends, and a central section of the strip is a thin neck structure. During installation, the engagement strip 1042 is first pressed into the groove 1041 of a first power supply substrate. Then, the groove 1041 of a second power supply substrate to be connected is aligned with the installed engagement strip 1042 and pressed in vertically. An interference fit between the groove 1041 and the engagement strip 1042 ensures a firm fixation in the vertical direction and a bidirectional mechanical locking mechanism.Simultaneously, the adaptation of the narrow-opening, wide-hollow structure of the engagement groove to the I-shaped cross-section of the engagement strip prevents relative movement and rotation of the substrates in the plane direction after connection. This connection structure uses a purely vertical embedding design, suitable for fixed installation scenarios such as walls and ceilings. It supports direct connection operations without disassembling the substrates and possesses good vibration and pull-out resistance. As shown in... Fig. 5c and Fig. As shown in Figure 5d, this connection mechanism allows for flexible expansion and connection of three or more power supply substrates 100 on a fixed plane.

[0053] To further improve locking reliability and the operational feel after joining, as described in Fig. As shown in Figure 6, an elastic snap 10411 is provided on the inside of the thin neck section of the engagement groove 1041, and a snap slot 10421 is provided at a corresponding position on the engagement strip 1042, which fits the elastic snap 10411. When the enlarged ends of the engagement strip 1042 are pressed vertically into the engagement groove 1041 and pass through the thin neck section, the elastic snap 10411 slides into the snap slot 10421 on the engagement strip, producing a distinct "click" sound or tactile feedback, indicating that the connection is fully engaged and has entered a secondary locked state. This design not only provides a clear indication of assembly completion but also offers additional resistance against accidental release due to slight vibration or lateral forces.

[0054] Electrical Connection Section: The key to achieving the extension is the automatic electrical connection. The electrical connection section of the connection mechanism 104 uses a resilient contact design (not shown in the figures) to achieve automatic conduction during connection. Specifically, one or more sets of resilient conductive pin arrays are provided as plug contacts on a side edge of the substrate body; flat, gold-plated copper foil contact arrays are provided as sockets at corresponding positions on the side edge of an adjacent substrate body to be connected. When the two substrates are slid into the fully interlocking design position via the mechanical positioning assembly, the resilient conductive pins are compressed, forming a large-area, low-resistance, reliable electrical contact with the corresponding gold-plated contacts.This automatically and reliably connects the DC low-voltage power supply buses (positive and negative terminals) of the two substrates in parallel. This design avoids the cumbersome and potentially error-prone nature of manual user wiring and achieves true "connect-and-use" functionality.

[0055] For application scenarios requiring extremely high reliability (such as long-term public displays, environments with vibration), a quick-locking mechanism can be added in addition to the aforementioned positioning and electrical connection mechanism.

[0056] The aforementioned integrated design of positioning, routing, and (optional) locking mechanism makes expanding the power supply substrate extremely simple, fast, and reliable. Users can linearly expand the system as needed without tools or specialized knowledge, similar to assembling building blocks. This perfectly supports the advantageous core effect of the present invention: "flexible scalability."

[0057] To further increase the functional integration and scenario applicability of the power supply substrate 100, as described in Fig. Figure 7 shows that a variety of standard USB interfaces 105 can optionally be integrated into the peripheral side walls of the substrate body 101. These USB interfaces 105 are electrically connected to the internal low-voltage DC power supply circuit 103 and are powered independently of the safe low-voltage DC power supply (e.g., 5 V DC) provided by this circuit. The USB interfaces 105 can be used to provide a convenient auxiliary power supply for external low-power electronic devices (such as small sensors, controllers, decorative light strips, mobile devices, etc.), thereby expanding the application range of the system as a multifunctional low-voltage power supply platform. 2. Structure of the functional display module 200:

[0058] As in Fig. As shown in Figure 8, the functional display module 200 is a display terminal unit designed for use in conjunction with, but completely independently of, the power supply substrate 100. It establishes a physical and electrical connection with the power supply interface units 102 of the power supply substrate via its passive power supply interface 204, draws power only from the substrate, and receives no control commands. Provided the following two basic conditions are met, it can be considered a functional display module as defined by the present invention: It possesses a standardized passive power supply interface 204 capable of mate with and connecting to the interface units 102 of the power supply substrate; and it includes a low-voltage DC light source 202 and the necessary driver circuitry 203.

[0059] Therefore, the specific physical form and optical appearance of the module can be infinitely extended based on the aforementioned core architecture, thus forming a rich, customizable “smart lighting terminal” platform.

[0060] The standard core hardware architecture of the Functional Display Module 200 includes:

[0061] The passive power supply interface 204 is provided on the module housing and is a standardized physical connector that fits the power supply interface unit 102 of the substrate. The essential electrical feature of the passive power supply interface 204 is that it comprises only the positive and negative power supply pins necessary for the transmission of electrical energy and does not include any dedicated pins for data communication. It should be noted that the “passive power supply interface” described in the present invention specifically refers to a power supply interface that includes only the positive and negative power supply pins required for the transmission of electrical energy and does not include any dedicated pins for data communication.

[0062] Light source 202 and driver circuit 203: The light source 202 is typically an LED that is operated with the low DC voltage provided by the substrate. The driver circuit 203 provides a precise, constant power supply for the light source.

[0063] Optional, Control Unit 205: A control unit 205, typically a microcontroller, is integrated into an intelligent module that implements the full inventive functionality. Its memory contains at least one type of preset display program (such as "color breathing," "color gradient cycle," "specific blinking pattern," etc.). Upon receiving power via the passive power supply interface 204, the control unit 205 is designed to immediately and autonomously execute its preset program, thereby driving the light source 202 to produce the intended dynamic or static lighting effect. Its operation is completely independent of external commands.

[0064] Based on the aforementioned universal hardware platform, the external form and application scenarios of the functional display module 200 offer an extremely high degree of design freedom. Its housing 201 can be shaped according to the desired visual effect and can integrate corresponding optical designs. The module can be manufactured, for example, but is not limited to, the following types:

[0065] General lighting type: Like standard point light source modules, small spotlight modules, strip ambient light modules, used to form basic pixelated displays or uniform illumination.

[0066] Dedicated form functional display module: The housing 201 of this type of functional display module is designed and manufactured to a specific non-standard form (i.e., an irregularly shaped housing) to directly achieve a specific display function, visual semantics, or spatial form. Based on their design purpose and universality, the modules can be divided into the following two categories:

[0067] 1. Universal Theme Type: The housing is formed into standardized irregular shapes with universal semantics or widespread recognizability, such as English letters, numbers, holiday symbols (e.g., Christmas tree, snowflake, heart), common logos, etc. This module type can be mass-produced and reused. Users can quickly assemble or change display content for common themes such as "Happy Birthday" or "Happy New Year" by directly selecting and plugging / unplugging appropriate modules, thus achieving hardware-based programming based on a "theme library" of physical modules.

[0068] 2. Custom Integration Type: The housing is an irregularly shaped luminaire, meticulously customized for a specific artwork, brand representation, or spatial design project. Its shape, size, and optical properties are designed to integrate precisely into a particular artwork, corporate logo, architectural element, or spatial structure, presenting it as a unified whole.

[0069] Regardless of their external form, all these independent functional display modules 200 are physically plugged into the power supply interface units 102 of the power supply substrate 100 via their standardized passive power supply interfaces 204 on the underside and receive only power. Each module achieves fully autonomous operation through its built-in control unit 205. 3. Construction and connection of the modular display system

[0070] Based on the aforementioned structure of the power supply substrate 100 and the functional display modules 200, the modular display system according to the present invention is composed as follows:

[0071] At least one power supply substrate 100 is attached to a target location (e.g., wall, bracket, or frame). If the display area needs to be enlarged, several power supply substrates 100 are seamlessly connected mechanically and electrically to each other via the connection mechanisms 104 at their side edges, thus forming a continuous, flat power supply and support surface.

[0072] Users select appropriate modules from various categories of functional display modules (200) according to the desired visual content (e.g., text, pattern, dynamic effect). The housing (201) and the internal preset program (if it is an intelligent module) of these modules determine their final optical performance.

[0073] The selected functional display modules 200 are inserted sequentially via their passive power supply interfaces 204 on the underside into the corresponding power supply interface units 102 arranged in a matrix on the surface of the power supply substrate 100. The insertion position of the modules is determined by the user's hardware programming layout, with the coordinates of each power supply interface unit 102 corresponding to a pixel or functional point in the displayed image.

[0074] When the system is powered on, all inserted functional display modules 200 receive a uniform low-voltage DC power supply from the power supply substrate 100 via their passive power supply interfaces 204. Once power is supplied, the internal driver circuit 203 of each module begins to operate; if a module contains a control unit, this will autonomously execute the preset display program. Ultimately, the light emitted by all independently operating functional display modules 200 blends within the two-dimensional or three-dimensional space formed by their physical positions, presenting a macroscopically uniform and coordinated dynamic or static visual display effect.

[0075] The display logic of this system is fully defined by the type and program of the functional display modules 200 and their physical distribution on the coordinate grid of the power supply substrate 100.

[0076] Fig. Figure 9 is a schematic three-dimensional assembly view of an embodiment of the modular display system according to the present invention. The figure shows an implementation state in which 16 power supply substrates 100 (in a 4×4 arrangement) are seamlessly connected to one another via connection mechanisms and form a large, continuous display plane. Several functional display modules 200 are plugged into this plane. In this embodiment, the selected functional display modules 200 are spotlight modules with multidirectional light emission, whose light beams can be projected crosswise in space and provisionally demonstrate the system's potential for constructing a three-dimensional light field.This illustration comprehensively shows the overall architecture of the system, its ability to be expanded over a large area, its modular assembly form, and the feasibility of achieving display effects beyond a flat surface through irregularly shaped modules. Example II: Sequence, coordination principles and operating modes of the modular display system

[0077] This example illustrates the entire process of the modular display system, from planning and provision to achieving a coordinated display and supporting various operating modes. 1. Specific explanation of the system architecture relationship

[0078] As in Fig. As shown in Figure 2, the modular display system of the present invention uses a unique separate “platform-terminal” architecture:

[0079] The power supply substrate 100 serves as a non-intelligent power supply platform that only provides safe DC power supply ≤60 V, has no display control functionality and provides power supply interfaces to the outside via the matrix-shaped interface units 102.

[0080] The functional display modules 200 serve as independent intelligent end devices: Each module is a complete intelligent lighting unit, It internally integrates a light source, driver circuitry, control unit, and preset program. It draws power only from the substrate via the passive power supply interface 204 and, once powered, operates completely autonomously, independent of external commands.

[0081] The connection between the power supply substrate 100 and the functional display modules 200 includes:

[0082] Physical connection: The modules are fixed to the substrate interfaces via a plug connection.

[0083] Electrical connection: Only power transmission (positive and negative terminals), without data pins.

[0084] This architecture makes system expansion, maintenance, and content reconfiguration extremely easy: users only need to physically replace external modules to change the display content, while the power supply substrate can be used as a universal platform in the long term. 2. System deployment and "hardware programming" planning

[0085] First, the user calculates and prepares the required number of power supply substrates 100 based on the size of the target display area. The first substrate is fixed using its standard mounting interface (e.g., VESA mounting holes). If an extension is required, multiple substrates are joined via the side connection mechanisms 104 to form a seamless, continuous plane that creates the physical "display canvas".

[0086] The user selects 200 functional display modules according to their creative concept. These modules have been assigned specific shapes and preset programs within the product. For example, to create a birthday atmosphere, one could choose: artistic letter modules for "HAPPY BIRTHDAY" pre-programmed with a "warm white breathing effect", a "birthday cake"-shaped module pre-programmed with a "multicolored flashing effect", and a "firework"-shaped module pre-programmed with an "explosive flashing effect". 3. Core principle of coordinated display: Spatial positioning and autonomous operation

[0087] It is important to clarify that in the modular display system of the present invention, the power supply substrate 100 and the functional display modules 200 are two physically separable and functionally completely independent units. The power supply substrate 100 serves solely as a non-intelligent power supply platform that provides a safe low-voltage DC power supply; while each functional display module 200 is an independent display terminal that autonomously executes its preset program after receiving power. The only interaction between them is power transmission, without any data or control command interaction.

[0088] The functional display modules 200 achieve coordination based on the following two core rules:

[0089] Spatial positioning equals programming: Each power supply interface unit 102 represents a coordinate on the screen. Plugging a specific module into a specific interface is essentially a "function assignment" for that coordinate point.

[0090] Distributed autonomous operation: Upon receiving power, the control unit of each functional display module 200 immediately and autonomously executes its internal preset program, drives the light source, and generates lighting effects such as static colors, dynamic color gradients, rhythmic flashing, or pattern cycles. No data communication between the modules is required.

[0091] It is particularly important to note that, although the modules can operate independently without communicating data, the system can still achieve macroscopically uniform visual coordination and consistency. This is primarily achieved through one or more of the following technical mechanisms: (1) Period reference synchronization: The preset programs of the modules use the same or integer multiples of time period references (e.g., all use 1 second as a complete cycle period), thus naturally aligning the dynamic effects of different modules in the time dimension; (2) Power-on synchronization: In integrated start mode, all modules are powered on simultaneously and begin program execution from a reset state, thus achieving perfect initial phase consistency; (3) Environment sensing synchronization (optional enhancement mechanism): Some advanced modules may have built-in light sensors that adaptively adjust the phase or parameters of their own programs by sensing the light intensity or color changes of surrounding modules, thereby achieving finer-grained soft coordination.

[0092] The mechanisms mentioned above can be used individually or in combination to ensure that, in the absence of a central control unit, the lighting effects of each independent module can form a coordinated and uniform overall visual display effect.

[0093] Fig. Figure 10 is a schematic diagram illustrating the principle of "spatial positioning equals programming" according to the present invention. The figure shows, by way of example, that to create a themed scene congratulating James on his 18th birthday, a user selectively inserts various types of functional display modules (the number-shaped modules "1" and "8" with preset display programs, the letter-shaped modules "D", "E", "A", "R", "J", "A", "M", "E", "S", "T", "H", the irregularly shaped "Happy Birthday" module, and modules simulating flowers and candles) into specific positions on the coordinate grid of the power supply substrate. Upon receiving power, each module independently executes its internal preset program at its respective position.Through the spatial distribution of these modules and the coordination of their preset lighting effects, a birthday scene is visually fused and created. This illustration demonstrates how the "hardware programming" of display content is achieved through direct physical operations (plug-in / plug-out layout). 4. Two typical coordinated operating modes

[0094] Based on the principles above, the system supports two equivalent and frequently used operating modes to meet different scenario requirements: Operating mode A: Hot-plug dynamic reconfiguration mode

[0095] This operating mode is suitable for scenarios requiring frequent and immediate content changes and embodies the ultimate flexibility of the system.

[0096] Procedure: Keep the power supply substrate 100 in a normal, powered-on state (its interface units 102 continuously supply a safe DC power supply). According to the new layout plan, the user removes old modules that need replacing directly from the outside while the system is powered on and inserts new modules into their designated positions.

[0097] Coordination implementation: Each newly inserted module starts immediately upon power connection and joins the existing display. Since the program of each module is independent, careful program design (e.g., setting the dynamic effect periods to the same or multiples thereof) allows the lighting effects of old and new modules to quickly blend visually, achieving seamless content reconfiguration every minute. Operating mode B: Integrated start mode

[0098] This operating mode is suitable for one-off installations, scenarios with high requirements for initial synchronization, or those seeking the simplest installation process, and reflects the reliability and ease of use of the system.

[0099] Procedure: While the power supply substrate 100 is de-energized, the user pre-installs all functional display modules 200 externally in their planned positions. After all physical connections are completed, the substrate's main power disconnect is closed all at once.

[0100] Coordination implementation: The control units of all modules receive power simultaneously and in strict synchronization, and begin program execution from a reset state. This ensures that all dynamic effects exhibit perfect initial phase consistency from the very first moment, making it suitable for creating highly effective opening visual effects or ceremonial scenarios.

[0101] Fig. 11a and Fig. Figure 11b shows flowcharts illustrating the operating modes of the modular display system according to the present invention, wherein Fig. 11a is a flowchart of the hot-plug dynamic reconfiguration mode and Fig. 11b is a flowchart of the integrated startup mode.

[0102] Using the creation of the aforementioned "Happy Birthday" scene as an example: The user inserts modules such as letters, cake, and fireworks into their corresponding positions according to the design layout. When operating mode B is used, all modules light up immediately after the main power is switched on, with the letters breathing gently, the cake flashing merrily, and the fireworks exploding randomly – a coordinated and vibrant scene is presented instantly and completely. A week later, if a change to a "Christmas" theme is required, operating mode A can be used: While the system remains powered, most modules are hot-swapped, and the scene theme transitions seamlessly within a short time.

[0103] Whether in operating mode A or B, the system's eventual coordinated visual effect arises from the combination of "planning the spatial positions of the modules" and the "distributed execution of each module's autonomous program." Macroscopic coordination is achieved through the inherent timing design of the module programs and the synchronized power-on.

[0104] The display flexibility of the present invention is not limited to the aforementioned two-dimensional planar (XY-axis) operating modes. Since the functional display modules are 200 independent physical units, the system supports free expansion in the third dimension (Z-axis), thereby achieving a fundamental leap from "generating a three-dimensional impression on a plane" to "creating a physical light unit in space".

[0105] Users can position each module at different heights from the substrate surface using simple mechanical means (e.g., selecting standardized extension rods of different lengths), thus performing "three-dimensional spatial programming." For example:

[0106] In the "Happy Birthday" scene, the "HAPPY" modules can be placed at a basic height, the "BIRTHDAY" modules can be easily raised using short poles, while the "Birthday Cake" module can be brought to the highest position using a long pole as a visual focal point.

[0107] In a "hot air balloon" theme, the "balloon" modules can be suspended in a high position and the "basket" modules can be placed in a low position.

[0108] This "height programming" allows light from different modules to create true occlusion in depth and three-dimensional superposition in three-dimensional space, resulting in a visual image with depth. This completely breaks the two-dimensional planar limitation of traditional displays. Each module becomes a "voxel" that can be freely positioned in three-dimensional space. By arranging these "voxels" along the X, Y, and Z axes, users can directly program a three-dimensional scene with real spatial relationships at the hardware level.

[0109] A typical application method for the three-dimensional extension of the system is as follows: Modules A, B, and C are installed at different heights (Z1, Z2, Z3) using standardized extension rods of increasing length (L1 < L2 < L3). Although they are located at different spatial positions, their passive power supply interfaces 204 on the underside remain connected to the power supply interface units 102 on the substrate surface, drawing power from the unified system and operating independently. The light emitted by each module interweaves and blends in three-dimensional space, ultimately forming a three-dimensional light field with a true sense of volume. Example III: Planning and connection extension method for large-area systems

[0110] For large exhibition halls or building facades, a single substrate is insufficient to cover the required area. The present invention enables seamless expansion by connecting multiple substrates.

[0111] Planning phase: The designer "pixelates" the effect drawing onto a virtual substrate grid using software and generates a detailed bill of materials and a layout diagram. The bill of materials lists the quantities of the required different types of functional display modules, and the layout diagram precisely indicates on which substrate and at which grid coordinate each module should be inserted.

[0112] Assembly phase: Installation personnel first connect several power supply substrates 100 using the side connection mechanisms to form a large, continuous plane on the wall. Then, according to the layout diagram, they insert the corresponding models of the functional display modules 200 one after the other into the specified coordinates of the specified substrates. Example IV: Information display and emotional scene construction - Application of the electronic photo frame module

[0113] This embodiment focuses on explaining the extended applications of the present invention in information display, personalized content presentation and emotional scene construction, which are specifically realized by a novel information-displaying functional display module - the electronic photo frame module. 1. Structure and key features of the electronic photo frame module

[0114] The electronic photo frame module 2001, as a specific embodiment of the functional display module 200, adheres fully to its core architecture: It has a standardized passive power supply interface 204, which is compatible with the power supply substrate 100, and includes an internal low-voltage DC display unit, a driver circuit, and a control unit. The passive power supply interface of the electronic photo frame module comprises only positive and negative power supply pins and does not include any data communication pins.

[0115] Physical form: The housing can take on various shapes according to design requirements. Besides the classic rectangle, it can also be designed as irregular structures such as heart-shaped, round, cloud-shaped, letter-shaped, etc., whereby the module itself becomes part of the displayed content or possesses a specific emotional symbolism.

[0116] Display core: A small flat display is integrated on the front of the housing to display static images or dynamic videos.

[0117] Intelligent core: A control unit (microprocessor) and memory are integrated inside the module. The memory contains firmware for image / video decoding programs and playback logic and can pre-store multiple sets of thematic digital content packages. Each content package can be linked to a specific emotional, temporal, or spatial theme. For example: a "Family Growth" theme package contains group photos of family members at different ages; a "Brand History" theme package contains introductory graphics and text about the company's history and product lines.

[0118] Decentralized operation: Consistent with all functional display modules 200, the control unit of the electronic photo frame module 2001, after receiving power from the power supply substrate 100 via the passive power supply interface 204, immediately and autonomously executes the preset program and cycles through the defined content package. The entire process requires no external data commands. 2. “Hardware programming” application in the modular display system

[0119] The application of the electronic photo frame module extends the concept of “hardware spatial programming” of the present invention from light and shadow programming to content and emotion programming.

[0120] Content programming: The user selects a theme to display (e.g., "Child Growth"), which involves choosing an electronic photo frame module pre-loaded with photo sets of various age groups. Inserting this module into the power supply completes the hardware programming of the "display content" for that coordinate point. Changing the content requires no software adjustments; simply replacing the module with one that stores different thematic content is sufficient.

[0121] Form and space programming: The arrangement of modules of different shapes and contents by the user on the coordinate grid of the substrate directly forms a physical digital photo wall full of narrative.

[0122] Hybrid media-coordinated display: The electronic photo frame module can be seamlessly coordinated with other module types in the system. For example, at a birthday party, an electronic photo frame module pre-loaded with birthday photos is plugged in, while simultaneously, light modules with a pre-programmed "candle" effect are plugged in around it. Both operate independently but work together visually to create a warm atmosphere. 3. Typical application scenario sequence

[0123] Using the example of constructing a "child growth" scene, the user operations are as follows:

[0124] Planning: Plan the position of each module on the “canvas” formed by the power supply substrate 100.

[0125] Selection: Choose from the module library:

[0126] Several small, irregularly shaped electronic photo frame modules (pre-loaded with photos of the child at different ages).

[0127] Programming (plugging in / unplugging): Plug in all modules according to the plan at the corresponding coordinates.

[0128] Operation: Once the system is powered on, all modules start independently. The electronic photo frame modules automatically begin a slideshow. Without any software synchronization, a vibrant, warm, and dynamically changing display of the child's growth memories is presented immediately.

[0129] Reconfiguration: As the child grows, the user can easily replace some electronic photo frame modules with new photos, quickly updating the entire wall atmosphere.

[0130] As in Fig.As shown in Figure 12, the aforementioned application process is intuitively represented as the layout of several electronic photo frame modules with different shapes and content themes on the power supply substrate. This illustration clearly demonstrates how the "spatial programming" of content and emotions is achieved through hardware-based plugging and unplugging. 4. Summary of technical effects

[0131] By introducing the electronic photo frame module, the modular display system of the present invention achieves:

[0132] Hardware-based implementation of content carriers: Binding digital content (photos, videos) to physical modules transforms content updates into intuitive hardware operations.

[0133] Spatial expression of emotions: The combination of modules with different themes and forms in space materializes and contextualizes abstract emotions and memories.

[0134] Generalization of system capabilities: It proves that the basic architecture of the present invention is not only suitable for light and shadow control, but also represents an expandable, universal, decentralized spatial information presentation platform with broad application prospects.

[0135] This embodiment further confirms the powerful flexibility and resilience of the distributed architecture of the “non-intelligent power supply platform” and the “self-intelligent functional modules” of the present invention. Any intelligent terminal device that matches its interface and operating logic (including, but not limited to, light and shade, information display, sensor modules, etc.) can be integrated into the system, thereby continuously expanding its application boundaries. Example V: Advanced artistic effect realization - Three-dimensional light sculpture

[0136] The flexibility of the present invention extends far beyond flat surfaces. Three-dimensional displays can be achieved by combining specially designed modules.

[0137] For example, a module with an adjustable optical axis is being developed. Its housing is connected to a gimbal joint, and the light source is mounted on the gimbal joint. Users can adjust the beam direction manually or with simple tools to any orientation.

[0138] In a gallery installation, the artist uses extension rods with standard interfaces to "lift" multiple modules with adjustable optical axes to different height positions in three-dimensional space relative to the substrate surface. The beam angle of each module is then finely adjusted: some beams are made to intersect, some are projected onto specific objects, and some form "pillars of light" in the air. Both ends of the extension rod are fitted with electrical connectors compatible with the Power Supply Interface Units 102 and the Passive Power Supply Interface 204, and the rod body incorporates conductors to ensure reliable power transmission along the extended path.

[0139] At this point, although these modules are not physically on the same plane, they continue to receive power from the same power supply substrate system and operate independently. Together, they define a "light sculpture" in three-dimensional space, composed of light beams, which can be entered and viewed. This is an absolutely unattainable experience for traditional planar displays and demonstrates the ultimate potential of the present invention as a "light environment programming platform."

[0140] In summary, the present invention successfully opens up a new technical category through the trinity of hardware innovation comprising the "power supply substrate," the "functional display module," and the "modular display system," as well as their revolutionary application methods. All modifications, improvements, or applications based on the core concept of the present invention—namely, the distributed architecture that combines a "non-intelligent power supply substrate" with "self-intelligent functional modules"—fall within the scope of protection of the present invention. The foregoing descriptions are merely preferred embodiments of the present invention. For those skilled in the art, all improvements and refinements that do not deviate from the principles of the present invention should be considered to fall within the scope of protection of the present invention.

[0141] Reference numeral list: 100, Power supply substrate; 101, Substrate body; 102, Power supply interface unit; 103, DC low-voltage power supply circuit; 1031, AC-DC conversion module; 104, Connection mechanism; 105, USB interface; 106, Mounting through hole; 107, Mains disconnect; 108, Infrared sensing / receiving hole; 1041, Engagement groove; 1042, Engagement strip; 10411, Elastic snap; 10421, Snap slot; 200, Functional display module; 201, Housing; 202, Light source; 203, Driver circuit; 204, Passive power supply interface; 205, Control unit; 2001, Electronic photo frame module.

Claims

[1] Power supply substrate, characterized by , that it includes: a substrate body; a multitude of power supply interface units arranged on the substrate body in a matrix configuration; and a DC low-voltage power supply circuit; wherein the DC low-voltage power supply circuit is designed to provide a DC low voltage of not more than 60 V to the plurality of power supply interface units; wherein the power supply substrate does not include a data command generation and transmission circuit designed to control a display content of an external display module. [2] Power supply substrate according to claim 1, characterized bythat the DC low-voltage power supply circuit includes an integrated AC-DC conversion module designed to convert an external alternating current to DC low voltage. [3] Power supply substrate according to claim 1, characterized by that the multitude of power supply interface units are electrical connectors with a self-locking function. [4] Power supply substrate according to claim 1, characterized by , that at least one side edge of the substrate body is provided with a connection mechanism designed for mechanical connection with another power supply substrate. [5] Power supply substrate according to claim 1, characterized by that the centers of the multitude of power supply interface units are located at the intersections of a regular rectangular grid or an equilateral triangular grid. [6] Power supply substrate according to claim 1, characterized by , that it further comprises one or more circuits selected from the group consisting of an overcurrent protection circuit, an overvoltage protection circuit and a reverse polarity protection circuit, which are connected between the DC low voltage power supply circuit and the plurality of power supply interface units. [7] Power supply substrate according to claim 1, characterized by , that it further comprises a distributed power distribution network formed by copper foil conductors; wherein the DC low-voltage current output by the DC low-voltage power supply circuit is provided to the plurality of power supply interface units via the distributed power distribution network. [8] Power supply substrate according to claim 7, characterized by that the distributed power distribution network integrates a self-resetting fuse and a blocking Schottky diode. [9] Power supply substrate according to claim 1, characterized by that the substrate body is provided with mounting through holes that penetrate from a front of it to a back of it. [10] Power supply substrate according to claim 1, characterized by , that at least one corner section of a front face of the substrate body is equipped with a touch probe [11] Power supply substrate according to claim 1, characterized by , further comprising an infrared sensing / receiving hole arranged on a surface of the substrate body; wherein the infrared sensing / receiving hole is electrically connected to an infrared receiving and control circuit integrated inside the substrate body and is designed to receive a control signal directed towards the power supply substrate transmitted by a suitable infrared remote control. [12] Power supply substrate according to claim 3, characterized by, that the self-locking function is implemented by integrating an additional mechanical structure around the electrical connector; wherein the mechanical structure comprises: a rotatable locking ring or a sliding lock with a built-in spring. [13] Power supply substrate according to claim 12, characterized by , that a core electrical part of the electrical connector uses a spring-loaded electrical connector or an elastic tuning fork structure as an outer ring negative contact with a central cylindrical positive contact. [14] Power supply substrate according to claim 4, characterized by, that the connection mechanism comprises a mechanical positioning assembly; wherein the mechanical positioning assembly comprises an engagement groove provided on a side edge of the substrate body and an I-shaped engagement strip provided at a corresponding position on an adjacent side edge, matching the engagement groove; wherein both ends of the engagement strip are provided with enlarged ends and a central section thereof is a thin neck structure. [15] Power supply substrate according to claim 14, characterized by , that an elastic snap is provided on an inside of the thin neck structure of the engagement groove and a snap slot matching the engagement strip is provided at a corresponding position on the engagement strip. [16] Power supply substrate according to claim 4, characterized by, that an electrical connection part of the connection mechanism has an elastic contact design and the electrical connection part of the connection mechanism comprises: one or more sets of elastic conductive pin arrays provided as plug contacts on a side edge of the substrate body; wherein flat gold-plated copper foil contact arrays are provided as sockets at a corresponding position on a side edge of an adjacent substrate body of the power supply substrate. [17] Power supply substrate according to claim 1, characterized by , that a variety of standard USB interfaces are further integrated into peripheral side walls of the substrate body; the USB interfaces are electrically connected to the DC low-voltage power supply circuit; wherein the USB interfaces are designed to provide an auxiliary power supply for external low-power electronic devices. [18] Modular display system, characterized by , that it includes: at least one power supply substrate according to claim 1; and a plurality of functional display modules, the plurality of functional display modules comprising: a housing; a light source and a driver circuit arranged in the housing and operated with DC low voltage; and a passive power supply interface arranged on the housing and designed to connect to the plurality of power supply interface units; The multitude of functional display modules are plugged into the multitude of power supply interface units of the power supply substrate via passive power supply interfaces; Each of the multiple functional display modules draws power from the passive power supply interface of the multiple functional display modules and, in response to the power supply substrate being energized, independently executes an internal preset display program of the multiple functional display modules to drive the light source in order to produce a corresponding lighting effect; Each of the multitude of functional display modules achieves visual coordination without data communication between the modules, based on each spatial distribution of the multitude of functional display modules on the power supply substrate and each of its own running preset display program of the multitude of functional display modules, through one or more of the following mechanisms: (a) the default display program of each functional display module uses the same or integer multiples of time period references; (b) all functional display modules are powered on simultaneously and begin program execution synchronously from a reset state; (c) at least some functional display modules detect states of surrounding modules via built-in environmental sensors and adapt adaptively; This creates a macroscopically uniform overall visual display effect on a display surface formed by the physical positions of the functional display modules. [19] Modular display system according to claim 18, characterized by , that each of the numerous functional display modules further includes: a control unit that stores a preset display program; the control unit is designed to autonomously execute the preset display program in order to drive the light source after receiving power via the passive power supply interface. [20] Modular display system according to claim 19, characterized by that the passive power supply interface only includes power supply pins and does not include data communication pins.

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