Display Panel Subpixel Scanning for Vertical Stripe Reduction
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Solution Overview
Problem
High-frequency electroluminescent display panels face issues with vertical stripes and reduced display effect due to insufficient charging time of gate scanning signals, particularly in high-resolution and large-size displays, leading to a decrease in image quality.
Innovation Solution
The display panel design includes a multiplexer with data selection units connected to data lines in a 1:12 configuration, where sub-pixels with different colors are assigned to separate scanning lines, allowing for staggered data signal transmission to ensure adequate charging time for drive transistors, particularly prioritizing sub-pixels with greater influence on the display effect.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a multiplexer with 1:12 configuration is used to reduce the number of signal traces, then the number of signal traces is reduced, but the scanning time of gate signals increases causing vertical stripes and reduced display effect
Solution Approach 1:
The patent segments the scanning process by dividing sub-pixels into different groups (first color sub-pixels and other color sub-pixels) that are scanned alternately. This segmentation allows the multiplexer to switch between different data lines for different color groups, effectively reducing the scanning time per group while maintaining the 1:12 multiplexer configuration.
Solution Approach 2:
The patent implements periodic scanning by alternating between first color sub-pixels and other color sub-pixels in sequential rows. This periodic action distributes the scanning load over time, reducing the scanning time for each color group within a frame period and preventing vertical stripe artifacts.
2Productivity
If data signals are provided sequentially to all sub-pixels, then data writing is completed, but the charging time for drive transistors is insufficient leading to vertical stripes
Solution Approach 1:
The patent segments the data writing process by separating first color sub-pixels from other color sub-pixels. Each segment receives data signals and completes charging in alternating sequences, allowing sufficient charging time for drive transistors while maintaining overall data writing productivity across the entire display panel.
Solution Approach 2:
The patent applies preliminary action by providing data signals to data lines for one color group before actively scanning to the other color group. This preliminary data signal provision ensures that drive transistors have adequate charging time before their corresponding sub-pixels are activated, preventing vertical stripe artifacts.
3Manufacturing precision
If sub-pixels with greater influence on display effect are prioritized for data writing, then display effect is improved, but the overall data writing time increases
Solution Approach 1:
The patent uses periodic action to alternate between prioritizing first color sub-pixels and other color sub-pixels in sequential rows. This periodic prioritization ensures that each color group receives adequate attention and charging time while maintaining balanced overall data writing time across the entire display panel, preventing display effect degradation.
Data Source
AI summary
Provided are a display panel, a display device and a driving method of the display panel. In the same row of pixel units, first control terminals of data write modules of sub-pixels having a first color are connected to the same first scanning line; and in the same row of pixel units, first control terminals of data write modules of sub-pixels having other colors except the first color are connected to the same second scanning line. The data write module is configured to provide a data signal cached by a data line for the drive transistor. In the same row of the pixel units, within time of one frame of a picture, time of providing data signals for data lines connected to sub-pixels having the first color is within time of writing data signals cached by data lines into pixel circuits of sub-pixels having the other colors.