Display Window Shift for Pixel Fault Detection
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Solution Overview
Problem
Existing displaying systems for trains, railway stations, and lines are complex and expensive, requiring special hardware to ensure the validity of displayed information, and do not allow operators to check for dead pixels without prior identification.
Innovation Solution
A method using a common screen and computer central unit to shift a display window relative to visual reference indicators, allowing operators to check for pixel faults by observing if the window remains fixed, thus simplifying the system and eliminating the need for special hardware.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a special safe LCD monitor with special hardware is used to guarantee the validity of displayed information, then the reliability of the displayed information is improved, but the device complexity and cost increase
Solution Approach 1:
The patent uses visual reference indicators (a copy or representation of the display window) to create a reference frame that allows operators to verify display validity. Instead of special hardware, a visual copy of the expected display pattern is superimposed on the actual display, enabling comparison and detection of deviations caused by dead pixels or display faults.
Solution Approach 2:
The patent introduces visual reference indicators as an intermediary element between the display window and the operator's verification process. These indicators serve as a mediator that provides a visual basis for comparison, allowing operators to detect display faults without requiring special hardware or prior knowledge of dead pixel locations.
2Reliability
If a special safe LCD monitor with no internal processing unit or memory is used, then the reliability of displayed information is improved, but the ease of operation and ability to check for dead pixels during use deteriorates
Solution Approach 1:
The patent applies preliminary action by pre-calculating and displaying visual reference indicators that represent the expected display pattern before the operator needs to verify display validity. The reference indicators are prepared in advance and continuously displayed, allowing operators to immediately compare them with the actual display content without needing to identify dead pixels beforehand or perform complex verification procedures.
Solution Approach 2:
The visual reference indicators serve as a visual copy of the expected display window content, allowing operators to verify display integrity by comparing the copy with the actual display. This copying approach enables ongoing verification without requiring special hardware or interrupting normal operation.
3Reliability
If methods shifting the display window to avoid dead pixels are used, then the reliability of displayed information is improved, but the ease of operation deteriorates because the operator must first identify the dead pixel
Solution Approach 1:
Instead of shifting the display window to avoid dead pixels (as in prior art), the patent inverts the approach by keeping the display window stationary and superimposing visual reference indicators that show where the window should be. This inversion transforms the verification process from an active search for dead pixels to a passive observation of whether the display matches the reference pattern.
Solution Approach 2:
The patent creates a visual copy (reference indicators) of the expected display window position and content, allowing operators to verify display validity by comparison rather than by actively searching for or avoiding dead pixels. This copying approach simplifies the operator's task while maintaining reliability.
Data Source
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AI summary
In this method for displaying information (19) on a screen (17) of a displaying system, the screen (17) includes pixels and the displaying system comprises processing means and control means of the pixels. The method comprises a reception step of a video signal comprising the information (19). Following to the reception step, the method comprises the following steps: the determination of visual reference indicators (34), the definition of a first display window (40) comprising the information (19) to display, the first display window (40) being intended to be displayed on the screen, the displaying of the first display window (40) and of the visual reference indicators (34) and the command of a shift in a predetermined direction of the first display window (40), relative to the visual reference indicators (34).