Tiling Display Timing Controller Cascade Synchronization
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Solution Overview
Problem
Tiling display apparatuses face image output synchronization issues due to non-standardized interfacing lengths between display modules, leading to delayed image data reception and output deviations, which existing synchronization technologies struggle to address effectively.
Innovation Solution
A tiling display apparatus with a set board and multiple timing controllers connected through cascading interfaces, where each controller independently calculates and synchronizes image data output times using current-stage and rear-stage input data enable signals, enabling simultaneous image data output across all modules regardless of connection structure standardization.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If display modules are connected in a cascading scheme to enable expansion, then the display apparatus can be scaled to different sizes, but image data reception timing becomes progressively delayed across modules
Solution Approach 1:
The timing controller pre-calculates and pre-adjusts the delay compensation values for each display module based on its position in the cascading chain. This preliminary action ensures that each module is pre-configured with the appropriate timing offset before image data transmission, thereby compensating for the progressive delay inherent in cascaded connections without requiring real-time adjustment.
Solution Approach 2:
The system implements a feedback mechanism where the timing controller receives timing information from the last display module in the cascade and uses this feedback to calculate and distribute appropriate delay compensation values to all intermediate modules. This closed-loop feedback ensures that timing deviations are continuously corrected across the entire cascaded structure.
2Ease of operation
If non-standardized interfacing lengths are used between display modules to accommodate flexible configurations, then installation flexibility is improved, but image output synchronization between modules deteriorates
Solution Approach 1:
The timing controller applies local quality adjustment by providing individualized delay compensation values to each display module based on its specific position and interfacing characteristics in the cascade. Instead of using a uniform timing adjustment for all modules, each module receives a customized timing offset that accounts for its local interfacing length and position, thereby maintaining synchronization despite non-standardized connections.
Solution Approach 2:
The system dynamically changes the timing parameters (delay compensation values) for each display module based on its position in the cascade and the actual interfacing lengths. The timing controller adjusts these parameters automatically, allowing the system to adapt to non-standardized connections while maintaining precise image output synchronization across all modules.
3Manufacturing precision
If existing output synchronization technologies are applied to tiling display apparatuses, then image output synchronization may be improved, but compatibility with non-standardized connection structures is limited
Solution Approach 1:
The timing controller implements a universal synchronization mechanism that can adapt to any cascaded connection structure regardless of standardization. By using a position-based delay compensation approach rather than a protocol-based approach, the system achieves multi-functionality and compatibility with various connection configurations while maintaining precise image output synchronization.
Solution Approach 2:
The system employs dynamic timing adjustment where the delay compensation values are automatically determined based on the actual physical configuration and position of each display module in the cascade. This dynamic adaptation allows the synchronization system to work effectively with non-standardized connections, making the solution versatile and compatible with various connection structures.
Data Source
AI summary
A tiling display apparatus includes a plurality of display modules connected to one another to configure a screen, a set board configured to output an input data enable signal and image data synchronized therewith to one of the plurality of display modules, and first to Nth (where N is a natural number of 3 or more) timing controllers configured for the plurality of display modules, the first to Nth timing controllers are sequentially connected to one another in a first direction through a first interface line based on a cascading scheme and configured to receive the input data enable signal and the image data at different timings which are sequentially delayed and synchronize a display time of the image data on the basis of an independently generated output data enable signal.