Electrophoretic Display Panel Multiplexing Signal Lines
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
In electrophoretic displays, the need for multiple pixel sub-electrodes and different voltages for each pixel results in a higher number of signal lines and driving chips, leading to increased complexity and afterimages due to inter-frame crosstalk.
Innovation Solution
A display panel design that includes a plurality of first region groups with pixel sub-electrodes, an electrophoretic liquid layer, and a common electrode, where first multiplexers share second signal lines to transmit signals to the pixel sub-electrodes in a time-sharing manner, allowing simultaneous voltage loading for all pixel sub-electrodes in a row or scanning line.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If multiple pixel sub-electrodes with different voltages are configured for each pixel, then transverse electric field is generated to drive electrophoretic particles, but the number of signal lines and driving chips increases
Solution Approach 1:
Multiple pixel sub-electrodes (second electrode and third electrode) within each pixel are merged into a single scanning line structure, allowing them to be controlled by a common scanning signal. This reduces the number of scanning lines required while maintaining the ability to apply different voltages to different sub-electrodes through the time-division multiplexing of data lines.
Solution Approach 2:
The patent employs periodic switching of data lines to apply different voltages to different pixel sub-electrodes sequentially within each frame period. By dividing the frame period into multiple sub-periods and switching data lines periodically, the system can drive multiple sub-electrodes with different voltages using fewer data lines than sub-electrodes.
2Reliability
If multiple pixel sub-electrodes are driven with different voltages, then transverse potential difference is created, but later-frame image erases earlier-frame image causing afterimages
Solution Approach 1:
The patent applies preliminary action by maintaining the voltage state of pixel sub-electrodes during the entire frame period through continuous connection to scanning lines. This prevents voltage fluctuations and ensures that electrophoretic particles remain stable in their positions, avoiding the erasure of previously displayed images and eliminating afterimage effects.
Solution Approach 2:
The scanning lines continuously maintain voltage connections to pixel sub-electrodes throughout the frame period, ensuring continuous and stable electric field application. This continuity prevents intermittent voltage changes that would cause image erasure and afterimages, maintaining stable display of the intended image.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This solution reduces the number of signal lines and driving chips required, effectively preventing inter-frame crosstalk and minimizing afterimages, while maintaining efficient voltage loading for the display panel.
Implementation Method 1
In the field of electrophoretic display, in order to realize a transverse electric field to drive electrophoretic particles
Data Source
AI summary
Disclosed are a display panel, a driving method thereof, and a display apparatus. The display panel has a plurality of first region groups arranged in a first direction and extending in a second direction. The first region group internally includes a plurality of first signal lines arranged in the first direction. A non-display region includes: a plurality of second signal lines, and a plurality of first multiplexers in one-to-one correspondence with the plurality of first region groups and sharing the plurality of second signal lines. The first multiplexers are connected to the first signal lines in the corresponding first region groups one to one. The first signal lines are electrically connected to pixel sub-electrodes in pixels arranged in the second direction.