Array Substrate Gate Line Touch Control Integration
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional in-cell touch-control display devices experience poor performance due to pixel undercharge, particularly in large-size displays, resulting from reduced display scan time for each frame, which causes dark or bright lines.
Innovation Solution
An array substrate is designed with a touch control signal driving line connected to a gate line, allowing simultaneous touch control detection and display scan, eliminating the need to reduce display scan time and preventing pixel undercharge.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If time-sharing scanning mode is adopted for touch control detection, then touch control function is achieved, but display scan time is reduced causing pixel undercharge and dark/bright lines
Solution Approach 1:
The patent merges the touch control signal driving line with the gate line by making them overlap in the same spatial region. The touch control signal driving line is positioned between the substrate and the gate line, allowing both touch control scanning and display scanning to occur simultaneously through the same physical pathway, thereby eliminating the need to reduce display scan time.
Solution Approach 2:
The gate line serves dual functions: it acts as both the gate line for display pixel control and as the touch control signal driving line for touch detection. This multi-functionality allows the display system to perform both display scanning and touch control scanning without sacrificing display scan time, as the same line structure is utilized for both purposes.
2Productivity
If touch control signal driving line is placed on the same layer as gate line, then simultaneous touch detection and display scan is achieved, but signal interference may occur
Solution Approach 1:
The patent applies different insulation treatments to different spatial regions. The isolation layer is selectively positioned only in regions where the touch control signal driving line and gate line overlap, while maintaining electrical connection through via holes where needed. This localized insulation approach prevents signal interference in critical regions while preserving necessary electrical connections.
Solution Approach 2:
The isolation layer acts as an intermediary element between the touch control signal driving line and the gate line. It provides electrical insulation in regions where the lines overlap, preventing direct signal interference, while allowing the lines to maintain their functional relationships through controlled connections via via holes.
Data Source
AI summary
An array substrate and a method for fabricating the array substrate, a display device and a method for driving the display device are provided. The array substrate includes: a substrate having a first surface and a second surface; a touch control signal driving line disposed on the first surface; an isolation layer disposed on the first surface and covering the touch control signal driving line; a via hole formed in the isolation layer; and a gate line disposed on the isolation layer and electrically connected to the touch control signal driving line through the via hole. The scanning time of the array substrate is not reduced due to a touch control detection, and the undercharge of pixels is thus avoided.