Source Driver Delay Compensation for Spare Wiring Disconnections
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Solution Overview
Problem
Existing methods for repairing disconnections in liquid crystal panels using spare wiring lines are inadequate for ensuring accurate signal correction, leading to mistiming of data signal transmission.
Innovation Solution
A display device configuration that includes a source driver capable of setting output delay amounts based on the disconnection position and pixel line position, using spare wiring lines to connect to disconnected data signal lines, ensuring appropriate signal correction by synchronizing the data signal output timing with the scanning signal timing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a spare wiring line is used to connect to a disconnected data signal line, then the disconnection can be repaired and signal transmission can be restored, but the signal transmission timing becomes inaccurate due to different path lengths and resistance
Solution Approach 1:
The patent applies parameter changes by dynamically adjusting the output delay amount based on the disconnection position and pixel line position. The source driver calculates and sets different delay values for pixels connected via spare wiring lines compared to normal data signal lines, compensating for the timing differences introduced by the alternative signal path.
Solution Approach 2:
The patent implements preliminary action by pre-calculating and setting the output delay amounts before actual signal transmission. The system determines the disconnection position in advance and configures appropriate delay values for each pixel, ensuring that timing compensation is already in place before the data signal is transmitted through the spare wiring line.
2Device complexity
If the output delay amount is set uniformly for all pixels, then the control logic is simple, but pixels connected via spare wiring lines experience timing errors and display defects
Solution Approach 1:
The patent applies local quality by implementing position-dependent delay compensation. Instead of a uniform delay setting, the source driver assigns different output delay amounts to different pixel groups based on their connection status. Pixels connected via spare wiring lines receive customized delay values tailored to their specific disconnection position, while pixels on normal lines use standard timing.
Solution Approach 2:
The patent implements dynamics by making the output delay amount adaptive rather than fixed. The delay configuration changes dynamically based on the disconnection position and which pixels are affected. This allows the system to optimize timing for each specific failure scenario rather than using a static, one-size-fits-all approach.
Data Source
AI summary
A display device includes a plurality of pixels, a plurality of scanning signal lines, a plurality of data signal lines, a source driver configured to supply a data signal to the plurality of pixels via a corresponding data signal line of the plurality of data signal lines, and a spare wiring line configured to connect to a disconnected data signal line. For each data signal output to a data signal line with disconnection corrected by the spare wiring line, the source driver sets an output delay amount according to a disconnection position and a line position of a pixel to be supplied with the data signal.