Display Driving Period Adjustment for Charging Inequality
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Solution Overview
Problem
LCD devices face charging inequality due to fixed display driving periods, leading to color inequality as higher gray levels require longer charging times, resulting in insufficient charging of some pixels.
Innovation Solution
A control method and device that adjusts display driving periods based on gray variations by calculating and reallocating the duration of each period to ensure sufficient charging time for pixels, generating a gate clock signal according to the adjusted periods.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If fixed display driving periods are applied, then the display timing is consistent and predictable, but some pixels cannot be charged sufficiently leading to color inequality
Solution Approach 1:
The patent applies dynamics by transitioning from fixed display driving periods to variable display driving periods. The control device dynamically adjusts the duration of each display driving period based on the gray level requirements of the image data, allowing the system to adapt charging time to actual needs while maintaining overall timing consistency through coordinated adjustment of multiple periods.
Solution Approach 2:
The patent implements parameter changes by modifying the duration parameter of display driving periods. The control device calculates gray variations and adjusts the length of each display driving period accordingly, changing the time parameter to ensure sufficient charging time for high gray level pixels while maintaining display synchronization through proportional adjustment of multiple periods.
2Manufacturing precision
If the duration of each display driving period is increased to ensure sufficient charging time, then pixel charging is adequate, but the overall display refresh rate decreases
Solution Approach 1:
The patent applies merging by combining the charging time requirements of multiple display driving periods. The control device calculates gray variations across multiple periods and adjusts their durations collectively, allowing high gray level pixels to receive sufficient charging time while compensating by reducing time in other periods, thereby maintaining overall display refresh rate.
Solution Approach 2:
The patent uses dynamics to balance charging sufficiency and refresh rate by dynamically adjusting individual display driving period durations based on actual gray level requirements. The system dynamically allocates time resources across different periods, extending time only where needed for high gray level pixels while maintaining overall productivity.
3Manufacturing precision
If variable display driving periods are used to match gray level requirements, then charging inequality is resolved, but the control system complexity increases
Solution Approach 1:
The patent implements feedback by calculating gray variations from image data and using this information to adjust display driving period durations. The control device continuously monitors gray level requirements and provides feedback-adjusted timing, resolving charging inequality through data-driven dynamic adjustment while maintaining systematic control.
Solution Approach 2:
The patent applies preliminary action by pre-calculating gray variations for multiple display driving periods before execution. The control device performs preliminary analysis of image data to determine required charging times, then adjusts period durations in advance, simplifying real-time control while ensuring charging uniformity.
Data Source
AI summary
A control method for charging time sharing in a display apparatus, which includes receiving image data including a plurality of pixel data signals corresponding to a plurality of display driving periods, each display driving period associated with pixel data signals of a respective row of the display apparatus, calculating a plurality of gray variations corresponding to the plurality of display driving periods according to the plurality of pixel data signals, adjusting the plurality of display driving periods to generate a plurality of adjusted display driving periods according to the plurality of gray variations, and generating a gate clock signal according to the plurality of adjusted display driving periods.