Hybrid Inversion Pixel Driving Architecture for 8K Display Flicker
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Solution Overview
Problem
Existing column inversion pixel driving architectures for large-size Ultra High Definition (UHD) or LCD panels with 8K resolution suffer from limited reduction of subjective vertical flicker, leading to poor brightness uniformity and charging issues.
Innovation Solution
A pixel driving architecture that employs hybrid inversion modes, including column inversion, one-plus-two-line point inversion, and two-line point inversion, to improve flicker uniformity and charging efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If column inversion driving mode is used, then vertical flicker is reduced, but charging efficiency deteriorates and twill issues occur
Solution Approach 1:
The patent implements dynamic switching between column inversion mode and point inversion mode based on frame timing. During even frames, column inversion is applied to reduce vertical flicker. During odd frames, point inversion is applied to improve charging efficiency. This dynamic adaptation resolves the contradiction by allowing the system to optimize for different parameters at different times.
Solution Approach 2:
The patent employs periodic alternation between two driving modes with a period of two frames. Even frames use column inversion driving to address vertical flicker, while odd frames use point inversion driving to address charging efficiency. This periodic switching allows both contradictory requirements to be satisfied in an alternating fashion.
2Object-affected harmful factors
If symmetric code is used to minimize brightness difference, then vertical flicker is reduced, but panel display resolution is compromised
Solution Approach 1:
The patent dynamically selects between column inversion and point inversion modes based on timing requirements. Column inversion is used during even frames when flicker reduction is prioritized, while point inversion is used during odd frames when resolution maintenance is prioritized. This dynamic selection avoids the resolution compromise associated with symmetric code.
Solution Approach 2:
The patent changes the inversion parameter (from column-based to point-based) periodically to balance flicker reduction and resolution maintenance. By switching the inversion strategy based on frame timing, the system achieves flicker mitigation without permanently compromising display resolution.
3Object-affected harmful factors
If one-plus-two-line or two-line point reversal arrangement is used, then vertical flicker is reduced, but charging deteriorates and twill is caused
Solution Approach 1:
The patent implements periodic switching between column inversion mode (for flicker reduction) and point inversion mode (for charging optimization). By alternating these modes every frame, the system achieves flicker reduction during column inversion frames while maintaining charging performance during point inversion frames, avoiding the twill issue.
Solution Approach 2:
The patent dynamically adapts the inversion strategy based on frame timing. During even frames, column inversion is applied to reduce vertical flicker. During odd frames, point inversion is applied to maintain charging performance. This dynamic adaptation prevents the charging deterioration and twill issues associated with continuous use of point reversal arrangements.
Data Source
AI summary
This application discloses a pixel driving architecture, a display panel, and a display device. The pixel driving architecture uses three hybrid inversion modes of column inversion, one-plus-two-line point inversion, and two-line point inversion to drive the display panel. This improves the subjective vertical flicker brought about when the Strip architecture is driven by the driving mode of column inversion alone, and compared with the one-plus-two-line point inversion or two-line point inversion driving mode, the charging effect of the panel is better, and can make the twill disappear.