Display Row Driving With Pre-Charging for High-Refresh Panels
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Solution Overview
Problem
High-resolution and high-refresh-rate displays face issues with insufficient charging of sub-pixels due to reduced charging duration, leading to poor image quality and increased RC loading, which affects the display's fluency and viewing experience.
Innovation Solution
A display driving method that alternates between displaying odd and even frames with real and interpolated data, utilizing a two-row charging duration for each row, and employs data polarity and mapping relationships to ensure adequate pixel charging, including pre-charging from adjacent rows when necessary.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the resolution and refresh rate of the display are increased, then the picture quality and fluency are improved, but the charging duration for each row is reduced leading to insufficient pixel charging
Solution Approach 1:
The patent implements pre-charging for odd-numbered rows using even-numbered frame data before the odd frame is displayed. This preliminary charging action ensures that rows have sufficient charge accumulation time despite the high refresh rate, directly resolving the contradiction between improved productivity (refresh rate) and reduced duration (charging time) by performing the charging action in advance during the previous frame's time slot
2Productivity
If the resolution and refresh rate are increased, then the picture fluency is improved, but the RC loading increases affecting display performance
Solution Approach 1:
The patent segments the display refresh process into alternating odd and even frames with different charging strategies. Odd frames use pre-charged data from even frames for certain rows, while even frames charge all rows normally. This segmentation allows the system to manage RC loading by distributing the charging burden across different time slots and row groups, preventing the harmful effect of excessive RC loading that would occur with uniform high-speed refreshing of all rows
3Manufacturing precision
If real data is used for all rows in high refresh rate displays, then the image quality is maintained, but the charging time is insufficient leading to poor pixel saturation
Solution Approach 1:
The patent uses data copying where even-numbered frame data is copied and used to pre-charge odd-numbered rows before the odd frame display. Instead of requiring sufficient charging time for every row during its own frame period, the system copies previously acquired data and applies it to subsequent rows, maintaining image quality through adequate charge accumulation without extending the actual charging duration within each frame's time slot
Data Source
AI summary
A display driving method, a display driving device and a display device are provided. The display driving method includes: when displaying an odd-numbered frame, providing first parity row data of the odd-numbered frame to a display array, to enable a third parity row of the display array to be displayed based on real data of the first parity row data and enable a fourth parity row of the display array to be displayed based on interpolation data of the first parity row data; and when displaying an even-numbered frame, providing second parity row data of the even-numbered frame to the display array, to enable the fourth parity row of the display array to be displayed based on real data of the second parity row data and enable the third parity row of the display array to be displayed based on interpolation data of the second parity row data.