In-cell Touch Array Substrate Narrow Border Design
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
In-cell touch array substrates face challenges in achieving a narrow-border design, which limits the visual experience due to the placement of data and scanning drivers on top and sides, hindering the goal of a frameless liquid crystal display.
Innovation Solution
The in-cell touch array substrate features alternatively arranged data lines and horizontal gate scanning lines with pixel switches interconnected to adjacent lines, vertical gate scanning lines perpendicular to the horizontal lines, and vias for electrical connection, allowing both gate scanning and data lines to share the same driving direction, enabling the data and scanning drivers to be packed within the substrate, thus achieving a narrow-border design.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Length of moving object
If data driver and scanning driver are installed on top and side of the substrate, then driving function is achieved, but frameless design goal cannot be realized and border width increases
Solution Approach 1:
The patent merges the data driver and scanning driver functions into the substrate itself by integrating transparent conducting oxide (TCO) layers that serve dual purposes: as touch electrode materials and as driver circuit components. This consolidation eliminates the need for separate driver modules on the substrate edges, enabling frameless design while maintaining driving functionality.
Solution Approach 2:
The patent transitions from a planar driver arrangement (on top and sides) to a multi-layer vertical integration within the substrate. By stacking transparent conducting oxide layers and utilizing vertical electrical connections, the driver functions are embedded within the substrate thickness rather than extending outward, achieving borderless edges.
2Volume of moving object
If in-cell technology is used for high integration and thin design, then compactness is achieved, but manufacturing yield deteriorates
Solution Approach 1:
The patent changes the material parameters by using transparent conducting oxide (TCO) with specific electrical and optical properties. The TCO layers are deposited with controlled thickness and conductivity parameters that enable both thin-film construction and reliable electrical performance, improving manufacturing yield while maintaining the thin profile characteristic of in-cell technology.
Data Source
AI summary
The present invention provides an in-cell touch array substrate, and which includes alternatively arranged data lines and horizontal gate scanning lines; pixel switches electrically interconnected to the adjacent horizontal gate scanning lines and data lines pixel electrodes electrically interconnected to the pixel switches; and vertical gate scanning lines arranged alternatively between every two adjacent data lines, and being perpendicular to the horizontal gate scanning lines, wherein at lease one via is defined in an intersection between the vertical gate scanning line and the horizontal gate scanning line such that the vertical gate scanning line and the horizontal gate scanning lines are electrically interconnected with each other through the via. With at least one via is defined at the intersections of the vertical gate scanning lines and the horizontal gate scanning lines so as to create an electrical interconnection between the vertical gate scanning line and the horizontal gate scanning line. By this arrangement, both the gate scanning lines and the data lines have the same driving direction. Under the limitation of the requirement of the cell packaging, this also help to realize the purpose of providing the in-cell touch array substrate with narrow-border. As a result, a wider visual experience can be achieved.