Ion Trap Electrode for Curved Display Devices
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Solution Overview
Problem
Display devices with curved or irregularly shaped display regions face challenges in retaining ionic impurities outside the display area, leading to potential display failures such as speckles and burning due to the ingress of metal ions, inorganic anions, and organic acids.
Innovation Solution
Incorporation of an ion trap electrode with a fixed potential between the gate driver and wiring regions around curved or notched portions of the display device, which prevents ionic impurities from entering the liquid crystal layer by retaining them in the peripheral region.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the display region has a curved or irregular shape, then the display device achieves better adaptability and aesthetic appeal, but ionic impurities can more easily enter the liquid crystal layer causing display failures
Solution Approach 1:
The patent divides the peripheral region into multiple ion trap electrode segments positioned at different locations (curved portions and notched portions) to effectively trap ionic impurities in complex-shaped display regions, preventing them from entering the liquid crystal layer while maintaining the desired display shape adaptability
Solution Approach 2:
The ion trap electrode acts as an intermediary barrier between the peripheral region and the liquid crystal layer, using electrical potential to attract and retain ionic impurities, thus protecting the display region from display failures while allowing curved or irregular shapes
2Reliability
If ion trap electrodes are added to prevent ionic impurities, then display reliability is improved, but device complexity increases
Solution Approach 1:
The patent combines multiple ion trap electrode segments into a unified electrical potential system, where all segments are connected to the same potential source, simplifying the control structure while maintaining effective impurity trapping across the entire peripheral region
Solution Approach 2:
The ion trap electrode structure serves multiple functions: it traps ionic impurities, defines the display region boundary, and can be positioned at various locations (curved and notched portions) to adapt to different display shapes, reducing the need for additional specialized components
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
Effectively prevents ionic impurities from entering the liquid crystal layer, thereby maintaining an appropriate electric field and reducing the risk of display failures like speckles and burning, even in areas with curved or notched shapes.
Implementation Method 1
An ion trap electrode to which a fixed potential is to be applied is provided between the gate driver and a wiring region in which wiring lines are arranged around at least one of the curved portions
Data Source
AI summary
A display device includes a substrate, a display region in which a plurality of pixels are provided on the substrate and that has a first side, a second side, a third side, a fourth side, and a plurality of curved portions, a peripheral region located between an end portion of the substrate and the display region, a plurality of scan lines extending in a first direction, a plurality of signal lines extending in a second direction, at least one gate driver arranged in the peripheral region and coupled to the scan lines, a signal line coupling circuit arranged in the peripheral region and coupled to the signal lines, a plurality of terminals aligned in the peripheral region, and a plurality of wiring lines coupling the terminals and the signal line coupling circuit.