Multi-Display Error Recovery via Image Compression and Feedback
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Solution Overview
Problem
Conventional multi-display systems using transition minimized differential signaling (TMDS) face limitations in transmitting high-resolution images due to bandwidth constraints, leading to screen abnormalities and errors, especially as the number of connected displays increases, making it difficult to implement large video wall systems with high-resolution UHD images.
Innovation Solution
A display apparatus with a processor that detects errors in image transmission, generates feedback signals, and compresses images to reduce bandwidth requirements, allowing for automatic recovery of screen abnormalities and stable transmission of high-resolution images across multiple displays by re-packaging and decompressing images as needed.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If the number of connected display apparatuses is increased to expand the video wall system, then the screen area is improved, but the probability of error in image transmission increases due to bandwidth limitations
Solution Approach 1:
The patent segments the image transmission process by introducing intermediate display apparatuses that act as independent transmission nodes. Each apparatus processes and re-transmits the image signal, breaking the long transmission chain into multiple shorter segments. This segmentation reduces the cumulative error probability across the entire system while maintaining large screen area through multiple connected displays.
Solution Approach 2:
The patent changes the transmission parameter by switching from direct sequential transmission to a system where intermediate apparatuses perform error detection and feedback. This parameter change allows the system to maintain reliable transmission over extended distances by actively managing signal quality at each transmission stage rather than relying on passive signal propagation.
2Manufacturing precision
If high-resolution UHD images are transmitted through HDMI to improve image quality, then the manufacturing precision is improved, but the bandwidth requirement increases causing screen abnormalities
Solution Approach 1:
The patent implements a feedback mechanism where intermediate display apparatuses detect transmission errors and send feedback signals to previous apparatuses in the chain. This feedback loop enables real-time error management, allowing high-resolution images to be transmitted reliably by identifying and correcting transmission issues before they propagate through the entire system.
Solution Approach 2:
The patent performs preliminary error detection at intermediate stages rather than waiting for the final display. By detecting and addressing transmission errors early in the transmission chain, the system prevents error propagation and ensures that high-resolution images maintain their quality throughout the entire display wall without screen abnormalities.
3Adaptability or versatility
If the image is sequentially transmitted through multiple display apparatuses to expand the system, then the adaptability is improved, but the error propagation increases causing screen abnormalities in all connected displays
Solution Approach 1:
The patent introduces feedback signals that travel in reverse through the transmission chain, allowing each intermediate apparatus to report errors to its predecessor. This feedback mechanism breaks the error propagation chain, enabling the system to expand adaptively while maintaining error resistance because errors are contained and corrected at specific transmission stages rather than affecting all connected displays.
4Productivity
If the bandwidth is increased to support more displays and higher resolution, then the productivity is improved, but the device complexity increases due to HDMI/DVI limitations
Solution Approach 1:
The patent segments the data transmission task across multiple intermediate apparatuses rather than requiring a single high-bandwidth connection. Each apparatus handles a portion of the transmission load, collectively achieving high productivity without requiring any single device to have excessive bandwidth capacity, thereby avoiding the complexity associated with high-speed interface standards.
Data Source
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AI summary
A display apparatus communicatively coupleable to a multi display system is provided. The display apparatus includes a display; a first connector configured to receive an image from a first display apparatus of the multi display system; a processor configured to perform a control so that a feedback signal that informs of a detection of an error is transmitted to the first display apparatus through the first connector when the error is detected in the received image, a compressed image in which the image is compressed is received from the first display apparatus in response to the feedback signal, and the received compressed image is decompressed to display the decompressed image through the display; and a second connector configured to transmit the compressed image to a second display apparatus of the multi display system.