Array Substrate Touch Electrode Shielding via Segmentation
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Solution Overview
Problem
Conventional in-cell capacitive-type touch panels face issues with light transmittance due to the widening of touch electrode leads, which prevents proper alignment of liquid crystal molecules and limits the overall transmittance of the touch panel.
Innovation Solution
The array substrate design incorporates a first and second electrode layer with touch electrode leads and transparent auxiliary electrode lines that connect sub-electrodes, allowing for shielding without increasing the width of the touch electrode leads, thereby maintaining light transmittance and improving display quality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the width of touch electrode leads is widened to shield electrodes from interference, then the shielding effect is improved, but the light transmittance of the touch panel deteriorates
Solution Approach 1:
The patent divides the first transparent electrode into multiple sub-electrodes and introduces transparent auxiliary electrode lines to connect them. This segmentation allows the touch electrode leads to remain narrow while the auxiliary electrode lines provide the necessary shielding effect, thus resolving the contradiction between shielding performance and light transmittance.
Solution Approach 2:
The patent introduces transparent auxiliary electrode lines as an intermediary element between the touch electrode leads and the pixel electrodes. These auxiliary lines provide the shielding function without requiring the touch electrode leads themselves to be widened, thereby maintaining high light transmittance while achieving effective shielding.
2Reliability
If the width of touch electrode leads is increased to improve shielding, then the shielding performance is enhanced, but the alignment of liquid crystal molecules deteriorates
Solution Approach 1:
By segmenting the first transparent electrode into sub-electrodes and using transparent auxiliary electrode lines to connect them, the patent enables effective shielding without increasing the width of touch electrode leads. This maintains the proper alignment of liquid crystal molecules at the periphery of pixel electrodes while achieving the desired shielding performance.
3Reliability
If transparent auxiliary electrode lines are added to connect sub-electrodes, then the shielding effect is improved, but the device complexity increases
Solution Approach 1:
The patent merges the shielding function with the existing electrode structure by introducing transparent auxiliary electrode lines that connect sub-electrodes. These auxiliary lines are integrated into the existing electrode layers and can be fabricated using similar processes, thus providing enhanced shielding without significantly increasing device complexity.
Solution Approach 2:
The transparent auxiliary electrode lines serve multiple functions: they connect the sub-electrodes to maintain electrical continuity, provide shielding against interference, and maintain transparency to allow light transmission. This multi-functionality reduces the need for separate components and minimizes the increase in device complexity.
Data Source
AI summary
An array substrate, a method of fabricating array substrate, a display panel including the array substrate, and a display device including the display panel, wherein the array substrate includes a first electrode layer and a second electrode layer arranged in an electrode stack, a data line (60) in a space between adjacent second transparent electrode layers, and at least one touch electrode lead (20) that is in contact with the first electrode layer.