Timing Controller Link Stability Check for Display Data Transmission
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Solution Overview
Problem
In display manufacturing, the existing data transmission methods between a timing controller and a source driver lack effective link stability detection, leading to potential data transmission errors and poor reliability, especially during transitions between low power consumption states.
Innovation Solution
A data transmission method involving link stability check data encoded using an 8b/10b encoding approach, which includes a start identification, verification data, and a scrambling identification to indicate the source driver port and LFSR initialization, is sent by the timing controller after clock calibration, allowing the source driver to verify the link stability and provide feedback for reliable data transmission.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the timing controller sends data directly after clock calibration without link stability detection, then the data transmission speed is fast, but the data transmission reliability deteriorates due to potential transmission errors
Solution Approach 1:
The patent applies preliminary action by performing link stability detection through sending check data before actual data transmission. The timing controller sends link stability check data to detect whether the data transmission link is stable, and only sends actual data when stability is confirmed. This preliminary detection mechanism prevents unreliable transmission without significantly increasing system complexity.
Solution Approach 2:
The patent implements feedback by having the source driver send feedback information to the timing controller based on whether the received link stability check data is correct. The timing controller adjusts its transmission behavior based on this feedback, creating a closed-loop control system that improves reliability while maintaining manageable complexity through intelligent retry and adaptation mechanisms.
2Reliability
If the timing controller performs clock calibration every time it wakes from low power state, then the data transmission accuracy is maintained, but the power consumption increases and wake-up time extends
Solution Approach 1:
The patent applies preliminary action by performing link stability detection through sending check data before actual data transmission. The timing controller sends link stability check data to detect whether the data transmission link is stable, and only sends actual data when stability is confirmed. This preliminary detection mechanism prevents unreliable transmission without significantly increasing system complexity.
Solution Approach 2:
The patent implements feedback by having the source driver send feedback information to the timing controller based on whether the received link stability check data is correct. The timing controller adjusts its transmission behavior based on this feedback, creating a closed-loop control system that improves reliability while maintaining manageable complexity through intelligent retry and adaptation mechanisms.
3Reliability
If link stability check data is sent multiple times to ensure detection accuracy, then the reliability of link status judgment is improved, but the time consumption for detection increases
Solution Approach 1:
The patent applies periodic action by sending link stability check data multiple times (at least 5 times) at regular intervals. This periodic transmission allows the system to accumulate sufficient detection samples to accurately determine link stability while controlling the total detection time through a predefined maximum number of attempts and time thresholds.
Solution Approach 2:
The patent applies parameter changes by dynamically adjusting detection parameters such as the number of check data transmissions (n≥5), time thresholds (T1, T2), and retry limits. These parameters can be configured to balance detection accuracy and time consumption based on specific application requirements, allowing optimization of the trade-off between reliability and speed.
Data Source
AI summary
This application discloses a data transmission method, a data transmission circuit, a display device and a storage medium, and relates to the field of display manufacturing. The method is used for a timing controller, the method including sending a link stability check data to a source driver after clock calibration, receiving feedback information sent by the source driver, where the feedback information is generated by the source driver when judging that the received link stability check data is correct, and sending target data to the source driver based on the feedback information.