Electronic Apparatus Daisy-Chain Display Error Recovery
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Solution Overview
Problem
In video wall devices where display modules are connected in a daisy chain, errors in individual modules or connection issues can lead to incomplete data transmission, resulting in inconsistent image display and luminance across modules.
Innovation Solution
The electronic apparatus employs multiple communication interfaces to transmit control data, identifying and addressing errors by re-routing data through alternative interfaces to ensure all modules receive control data, minimizing incomplete data reception and preventing collisions during bidirectional transmission.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If display modules are connected in a daisy chain method, then device complexity is reduced and ease of manufacture is improved, but reliability deteriorates because errors in individual modules or connection issues can lead to incomplete data transmission
Solution Approach 1:
The patent divides the daisy chain into multiple segments by identifying different transmission directions (first direction from first to last module, second direction from last to first module). This segmentation allows independent error detection and correction in each direction, improving reliability while maintaining the simple daisy chain structure.
Solution Approach 2:
The patent changes the transmission parameter by sending control data in both directions through the daisy chain simultaneously or alternatively. By varying the transmission direction parameter, the system can bypass modules with errors in one direction using the other direction, thereby improving reliability without changing the physical daisy chain configuration.
2Device complexity
If control data is transmitted through a single daisy chain path, then device complexity is minimized, but reliability worsens because any error in the chain causes data transmission failure to subsequent modules
Solution Approach 1:
The patent introduces dynamic error detection and adaptive retransmission mechanisms that activate only when errors are detected. The system dynamically switches between normal single-path transmission and error correction modes (retransmission in opposite direction, selective retransmission to specific modules), maintaining low complexity during normal operation while improving reliability when needed.
Solution Approach 2:
The patent implements feedback mechanisms where the last display module sends acknowledgment signals back to the electronic apparatus to confirm successful data reception. When acknowledgments are missing or errors are detected, the system triggers corrective actions such as retransmission. This feedback loop ensures reliability without requiring complex redundant structures.
3Reliability
If multiple communication interfaces are used to transmit control data, then reliability is improved by providing alternative transmission paths, but device complexity increases
Solution Approach 1:
The patent makes the existing daisy chain interface multi-functional by utilizing it for bidirectional communication. The same physical connection serves as both the first communication interface (transmitting in one direction) and the second communication interface (transmitting in the opposite direction). This eliminates the need for separate redundant interfaces while providing error correction capability through dual-directional transmission.
Data Source
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AI summary
An electronic apparatus is provided. The electronic apparatus communicates with an external display apparatus including plural display modules, and includes first and second connection interfaces and a processor. The first communication interface is connected to a first display module from among the display modules connected together in a daisy chain configuration. The second communication interface is connected to a second display module from among the display modules. The processor transmits control data to the first display module through the first communication interface, and based on identifying that an error has occurred in a reception of the control data in any of the display modules, controls the second communication interface to transmit the control data to the second display module.