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KR-102963235-B1 - Slim and Zero-bezel LED All-in-One System with Built-in Controller and LED Display Driving Method Using The Same

KR102963235B1KR 102963235 B1KR102963235 B1KR 102963235B1KR-102963235-B1

Abstract

The present invention relates to a Slim and Zero-bezel LED All-in-One System with an internally mounted controller, comprising an integrated controller cabinet integrating an Android board, a sending card, and a main power supply, a plurality of general cabinets equipped with a receiving hub integrated board and individual power supplies, and an LVDS interface. The Android board of the integrated controller cabinet independently reads and decodes video content without an external host PC to generate display control signals, and the sending card converts these into high-speed data packets using the LVDS method and transmits them at gigabit speeds. The receiving hub integrated board of the general cabinet integrates a receiver circuit, a signal converter, and a hub circuit onto a single board to receive and decode LVDS signals and convert and distribute them into LED module driving signals. The main power supply forms a 48V/60V common power bus to manage inrush current and prioritize power supply to the control system, and the individual power supply of each general cabinet provides independent power to the LED modules and boards. It maintains system stability even in the event of partial failures through a dual power management structure, enables a seamless large screen with no visually perceptible boundaries between cabinets thanks to its zero-bezel design and slim profile, and enhances maintenance convenience with remote control and self-diagnostic functions via a wireless network.

Inventors

  • 최광수
  • 최동수
  • 김상기
  • 이주화
  • 최기석

Assignees

  • 탐투스 주식회사

Dates

Publication Date
20260511
Application Date
20260206

Claims (8)

  1. In an LED all-in-one system (100) that independently performs video content playback and system control without connection to an external host PC and forms a large screen by combining multiple LED modules, An integrated controller cabinet (200) that establishes an independent control environment by having an Android board (210) equipped with an operating system for processing and playing video signals, a sending card (220) that converts and transmits a video signal received from the Android board (210) into an LED driving signal, and a main power supply unit (230) for stable power supply to the entire system integrated therein. A plurality of general cabinets (300) that emit LED modules by incorporating a receiving hub integrated board (310) that integrates receiving card and hub board functions into a single board and an individual power supply (320) for driving the cabinet, which are connected to the integrated controller cabinet (200) for data communication, and To transmit large-capacity video data and control signals generated in the integrated controller cabinet (200) to the plurality of general cabinets (300) at high speed, the system includes a daisy-chain type LVDS interface (400) that sequentially serially connects the integrated controller cabinet (200) as a master node and the plurality of general cabinets (300) as slave nodes by applying a low-voltage differential signal method. An LED all-in-one system characterized by the integrated controller cabinet (200) controlling the entire system as a master without separate external transmission equipment or video processor, and performing high-speed data distribution without image quality degradation through the LVDS interface (400).
  2. In claim 1, An LED all-in-one system characterized in that the sanding card (220) and the Android board (210) within the integrated controller cabinet (200) are integratedly designed on a single PCB board or combined in a stacked structure to reduce wiring complexity and shorten the signal path, thereby being implemented in the form of an integrated board.
  3. In claim 1, The above-mentioned Android board (210) is characterized by including a media processing unit (211) that decodes video files of various formats by embedding a multimedia codec, a content management unit (212) that downloads content from a remote server via a network, and a UI processing unit (213) that provides a user interface.
  4. In claim 1, The main power supply unit (230) is positioned at the bottom of the integrated controller cabinet (200) to form the main power bus line of the entire system, supplies a common power bus voltage of 48V or 60V to the entire LED system, performs inrush current management to stably support the large current required simultaneously by the individual power supply units (320) of multiple cabinets during initial startup, performs power stabilization in the event of a power outage or voltage fluctuation, and prioritizes supplying stabilized power to control system equipment including the Android board (210), the sanding card (220), and sensors, The individual power supply unit (320) within the general cabinet (300) is responsible for supplying power for driving the LED module of the cabinet, supplying power to the hub board and the receiving hub integrated board (310), and maintaining voltage for stable operation of the video data processing board, thereby ensuring independent power stability at the cabinet level and having a dual power management structure that distributes the load so that even if a power abnormality occurs in a specific cabinet, only that cabinet is affected and the entire screen does not go black.
  5. A method for driving an LED display using an LED system comprising a plurality of general cabinets (300) having an integrated controller cabinet (200) with an Android operating system-based control board and a transmission card built-in and a receiving hub integrated board (310), wherein A self-driving signal generation step (S100) for reading video content data to be played independently without the intervention of an external host PC from an Android board (210) inside the integrated controller cabinet (200) and generating a display control signal, and A signal conversion transmission step (S200) for converting the video content data and control signals into serialized high-speed data packets in a sanding card (220) inside the integrated controller cabinet (200), and A high-speed data transmission step (S300) for sequentially transmitting the converted data packet from the integrated controller cabinet (200) to the adjacent general cabinet (300) and between the general cabinets (300) via a low-voltage differential signal cable, and A signal reception distribution step (S400) for decoding an LVDS signal received from a receiving hub integrated board (310) mounted inside each of the above general cabinets (300), extracting image data of the area handled by the cabinet, and distributing it to an LED module, and An LED display driving method characterized by including an image display step (S500) in which LED elements are illuminated according to extracted image data using power supplied by individual power supply units (320) of each general cabinet (300) while the main power supply unit (230) of the integrated controller cabinet (200) maintains system control power.
  6. In claim 5, The above self-driving signal generation step (S100) is characterized by determining a screen splitting mode, brightness setting, and color correction value according to a user command received through a wireless communication module, and generating the same by including it in a video data header, and processing it directly in a processor within the Android board (210) without passing through a separate scaler or video processor equipment.
  7. In claim 5, The above signal conversion transmission step (S200) is characterized by dividing video content data into frames to generate a data packet containing a synchronization signal and cabinet address information in each frame, and adding a CRC value for error detection to the data packet and transmitting it, thereby driving an LED display.
  8. In claim 5, An LED display driving method characterized by further including, prior to the high-speed data transmission step (S300), a system initialization step (S150) in which the integrated controller cabinet (200) checks the connection status and operation status of each general cabinet (300), wherein in the system initialization step (S150), a unique ID is assigned to each general cabinet (300) and the transmission quality of the LVDS signal is tested to set optimal transmission parameters.

Description

Slim and Zero-bezel LED All-in-One System with Built-in Controller and LED Display Driving Method Using the Same The present invention relates to an LED display system, and more specifically, to a Slim and Zero-bezel LED all-in-one system that includes an integrated controller cabinet that integrates a control board and a transmission card based on an Android operating system without an external host PC or video processor, transmits high-speed video data to a plurality of general cabinets via an LVDS interface, and implements a seamless large-screen LED display by applying a zero-bezel design without a front bezel and a slim structure, and a method for driving an LED display using the same. Generally, large LED display systems form a large screen by combining multiple LED cabinets and operate by distributing video signals from a central control system to each cabinet. Conventional LED display systems required various external equipment, such as a separate host PC, video processor, and scaler, for the playback and control of video content, and required complex wiring structures and large installation spaces to connect these devices. In particular, video signals generated by the host PC are transmitted to the receiving card of each cabinet via a video processor, and the signals received by the receiving card are then distributed to the LED module through a separate hub board, undergoing a multi-stage processing process. This structure caused signal transmission delays, and the accumulation of signal quality degradation at each stage resulted in a problem where the final video quality was degraded. Furthermore, in the existing system, the entire display system frequently froze or rebooted when the host PC's operating system was unstable, and there was a single point of failure where the entire system would shut down in the event of an external equipment malfunction. In particular, there was the inconvenience of requiring specialized personnel to be present at the installation site for host PC maintenance, and it was difficult to change system settings or update content remotely. Regarding data transmission methods, existing systems used Ethernet cables or RS-485 communication lines to transmit video data to each cabinet; however, this approach had limitations in transmitting high-resolution video in real time due to bandwidth constraints. In particular, transmitting data to multiple cabinets simultaneously caused network congestion, resulting in frame drops or screen stuttering, and the system was vulnerable to electromagnetic interference, frequently causing image quality degradation due to noise. In terms of power management, the existing system adopted a centralized power supply method, distributing power from a single high-capacity power supply to all cabinets. This generated excessive inrush current during initial startup, placing a burden on the power supply units, and caused serious issues where a power failure in a specific section affected all connected cabinets, resulting in a full screen blackout. Furthermore, the unified power distribution structure of the entire system prevented load balancing, and the inability to ensure independent power stability for each cabinet created a vulnerability where the failure of a few cabinets could lead to the shutdown of the entire system. In terms of hardware configuration, the receiving card and hub board were manufactured and installed as separate circuit boards inside each cabinet; this occupied a significant amount of internal space, complicated wiring due to the cable connecting the two boards, and caused additional signal transmission delays. Furthermore, the bezel structure, which visually exposed physical boundaries when cabinets were combined, limited the ability to create a seamless large-screen configuration. Regarding this, Patent Document 1 and Patent Document 2 have been proposed as related prior art. Patent Document 1 relates to an LED display device and a method for controlling the same, and proposes a technology for controlling each LED module by receiving a video signal from an external controller in an LED display device comprising a plurality of LED modules. However, this technology has limitations in that it is structured to still rely on an external controller and cannot implement an independent self-driving system, and no specific method is presented to minimize the delay time occurring during data transmission between multiple cabinets, and there is a lack of a method to improve system stability through independent power management of each cabinet. Patent Document 2 relates to an image processing system for an LED display and discloses a technology for processing image signals and distributing them to multiple LED panels. However, this technology also requires a centralized image processing unit and fails to solve the problem of image quality degradation occurring during the signal transmission process to each panel. In addition, there are