Timing Controller Phase Adjustment for Multi-Drop Display Skew
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Solution Overview
Problem
In multi-drop architectures, the clock and frame signal transmission paths exhibit different delays, leading to varying timing skews for source drivers, causing some drivers to incorrectly latch data due to mismatched phase relationships.
Innovation Solution
A timing controller adjusts the phase of the clock and frame signals to compensate for different transmission path delays, ensuring each source driver receives signals with optimized timing skews.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a multi-drop architecture is used with a common transmission path for clock and frame signals, then device complexity is reduced and ease of manufacture is improved, but transmission path delays differ between clock and frame signals causing timing skew variations across source drivers
Solution Approach 1:
The frame signal transmission path is segmented into multiple independent paths, each corresponding to a different source driver. Each path can have its own phase adjustment mechanism, allowing independent timing calibration for each segment while still using the common multi-drop architecture.
Solution Approach 2:
Phase adjustment capabilities are distributed locally to different segments of the transmission path. Each source driver receives frame signals through a dedicated path with locally adjustable phase characteristics, enabling precise timing compensation without affecting other segments.
2Device complexity
If the clock signal and frame signal are transmitted through the same transmission path, then the architecture is simplified, but the timing skew between clock and frame signals varies for different source drivers causing data latching errors
Solution Approach 1:
The frame signal path is divided into separate segments for different source drivers, with each segment having independent phase control. This segmentation allows the clock signal to remain common while frame signal timing can be independently adjusted for each driver.
Solution Approach 2:
The phase relationship between clock and frame signals is made dynamically adjustable for each source driver. Phase shifters or delay elements are incorporated into each frame signal path to dynamically compensate for timing variations and ensure accurate data latching.
3Adaptability or versatility
If different source drivers receive clock and frame signals with different timing skews, then transmission path differences are reflected, but some source drivers cannot correctly latch data due to phase mismatch
Solution Approach 1:
Each source driver is equipped with or assigned a dedicated phase adjustment mechanism that locally compensates for its specific timing skew. This local quality approach ensures that each driver receives optimally timed signals despite variations in transmission path delays.
Solution Approach 2:
The phase parameter of the frame signal is independently adjusted for each source driver to compensate for timing skew variations. By changing the phase parameter locally at each receiver, accurate data latching is achieved despite different transmission path characteristics.
Data Source
AI summary
A timing controller and an operation method of the timing controller are provided. The timing controller includes a timing signal generation part and a frame signal generation part. The timing signal generation part generates a clock signal to a plurality of source drivers for driving a display panel. The frame signal generation part generates a frame signal synchronized with the clock signal. The frame signal includes a plurality of data segments corresponding to different source drivers. The timing controller adjusts a phase of at least one of the clock signal and the frame signal, so that the clock signal has different timing skews for different data segments and is adapted to different transmission path delays between the timing controller and the source drivers.