Display Panel Driving Method for Eliminating Bright Dark Stripes
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Solution Overview
Problem
The dual-gate driving architecture for liquid crystal display panels results in insufficient liquid crystal charging times due to data delay when polarities are reversed, leading to bright and dark stripes or grid phenomena.
Innovation Solution
A driving method that uses look-up tables to determine if compensation data is needed for sub-pixels, with specific tables for different color sub-pixels, to adjust the driving data and prevent these phenomena.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If dual-gate driving architecture is used to reduce data lines and source driver ICs, then manufacturing cost is reduced, but data writing time is halved causing insufficient liquid crystal charging time
Solution Approach 1:
The patent applies preliminary action by pre-calculating and storing compensation values in lookup tables (LUTs) before the display operation. The LUTs contain pre-computed data that compensates for the reduced charging time, allowing the system to directly retrieve and apply compensation values during operation without real-time calculation, thus maintaining adequate liquid crystal charging time while using dual-gate architecture.
Solution Approach 2:
The patent changes the driving parameters by introducing compensation values that adjust the voltage or data timing based on the position of sub-pixels. By modifying the driving parameters through LUT-based compensation, the system compensates for the halved data writing time caused by doubled gate lines, ensuring sufficient liquid crystal response time across all pixel positions.
2Ease of manufacture
If dual-gate driving architecture is used to reduce source driver ICs, then manufacturing cost is reduced, but bright and dark stripes or grid phenomenon appear due to data delay
Solution Approach 1:
The patent applies local quality by implementing position-specific compensation through lookup tables. Different compensation values are stored and applied for different spatial positions of sub-pixels within the display panel. This localized compensation approach addresses the data delay issue specific to certain pixel positions caused by the dual-gate architecture, eliminating bright and dark stripes or grid phenomena while maintaining the cost benefits of reduced source driver ICs.
3Productivity
If data writing time is halved in dual-gate architecture, then more rows can be driven simultaneously, but liquid crystal charging becomes insufficient when polarities are reversed
Solution Approach 1:
The patent uses preliminary action by pre-computing compensation values for different polarity reversal scenarios and storing them in lookup tables. When polarities are reversed, the system retrieves the appropriate pre-calculated compensation values based on pixel position, ensuring that liquid crystal charging time is sufficient even though data writing time has been halved by the dual-gate architecture.
Solution Approach 2:
The patent changes driving parameters dynamically based on polarity reversal conditions. By modifying the compensation parameters stored in LUTs according to the current polarity state and pixel position, the system ensures adequate liquid crystal charging time during polarity transitions while maintaining the high productivity benefits of halved data writing time through dual-gate architecture.
Data Source
AI summary
A driving method and a driving apparatus of a display panel and a display apparatus are provided. A position information of a current sub-pixel and a driving data for driving the current sub-pixel are obtained. A judgment parameter corresponding to the position information is found from a first parameter look-up table. The driving data whether needs to be compensated is determined. A compensation driving data corresponding to the driving data is found from a second parameter look-up table corresponding to the position information if it needs to be compensated, or else the driving data is directly outputted. Bright and dark stripes or grid phenomenon in a liquid crystal display panel can be effectively eliminated consequently.