Auxiliary Lines as Touch Signals in Dual Gate Array Substrates
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Solution Overview
Problem
Existing self-capacitance touch display panels face challenges in maintaining display aperture ratio due to non-transparent touch-sensing signal lines and imbalanced data lines in dual gate fabrication, leading to crosstalk and wasted space.
Innovation Solution
An array substrate design where auxiliary lines are used as touch-sensing signal lines, reducing the number of data lines and eliminating the need for additional masks, allowing for efficient use of space without compromising display aperture ratio.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If traditional touch-sensing signal lines are used in self-capacitance touch display panels, then touch-sensing functionality is achieved, but display aperture ratio is reduced due to non-transparent lines
Solution Approach 1:
The auxiliary lines are designed to serve dual purposes: they function as data lines for display signal transmission and simultaneously serve as touch-sensing signal lines for touch detection. This multi-functionality eliminates the need for separate dedicated touch signal lines, thereby maintaining display aperture ratio while achieving touch-sensing functionality.
Solution Approach 2:
The patent combines the data line function and touch-sensing signal line function into a single auxiliary line structure. By merging these two functions into one component, the design reduces the number of separate conductive elements needed, thus preserving display area while enabling both display and touch capabilities.
2Reliability
If additional masks are used for forming touch-sensing signal lines in dual gate fabrication, then touch electrode formation is achieved, but fabrication complexity and cost increase
Solution Approach 1:
The formation of touch electrodes and data lines is merged into a single fabrication process step. The auxiliary lines are formed using the same mask and deposition process as the data lines, eliminating the need for additional masks specifically for touch electrode formation. This reduces fabrication complexity while achieving the required touch electrode structure.
Solution Approach 2:
The auxiliary lines are designed to serve dual purposes: they function as data lines for display signal transmission and simultaneously serve as touch-sensing signal lines for touch detection. This multi-functionality eliminates the need for separate dedicated touch signal lines, thereby maintaining display aperture ratio while achieving touch-sensing functionality.
3Manufacturing precision
If the number of data lines is increased in dual gate fabrication, then display resolution is improved, but space utilization is reduced leading to wasted area
Solution Approach 1:
The auxiliary lines are designed to serve dual purposes: they function as data lines for display signal transmission and simultaneously serve as touch-sensing signal lines for touch detection. This multi-functionality eliminates the need for separate dedicated touch signal lines, thereby maintaining display aperture ratio while achieving touch-sensing functionality.
Data Source
AI summary
The present disclosure provides an array substrate. The array substrate includes a plurality of first lines along a row direction; a plurality of second lines along a column direction intersecting with the plurality of first lines to form a plurality of pixel units comprising a plurality of pixel electrodes in rows and columns; a plurality of touch electrodes in rows along the row direction and columns along the column direction; and a plurality of auxiliary lines along the column direction. Two first lines are between adjacent rows of pixel electrodes and two adjacent columns of the pixel electrodes form a pixel electrode group with one second line in between; and each auxiliary line is between two adjacent pixel electrode groups, each touch electrode being connected to at least one auxiliary line for transferring touch signals.