Touch Electrode Trace Layout for Uniform In-Cell Display Voltage
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
In in-cell touch display panels, the uneven distribution of touch traces connected to touch electrodes leads to voltage inconsistencies, causing display panels to split into upper and lower screens and display unevenly, due to the limited channels of the driving chip and the influence of touch traces on resolution.
Innovation Solution
A thin film transistor array substrate with a touch function layer comprising touch electrodes connected to a first common power line and a driving chip through rationally configured touch traces, where the number of touch traces between each electrode and the power line or chip is varied to ensure consistent voltage distribution, eliminating sudden changes in voltage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If the number of touch traces connected to each touch electrode is kept equal, then the voltage distribution uniformity is improved, but the device complexity increases due to limited driving chip channels and resolution constraints
Solution Approach 1:
The patent applies local quality by configuring different numbers of touch traces for different touch electrodes based on their specific positions and voltage requirements. Instead of uniformly distributing traces, the design allows electrodes in different regions (e.g., upper vs. lower screens) to have different trace counts, optimizing voltage distribution locally while considering global constraints of driving chip channels and resolution.
2Manufacturing precision
If the number of touch traces is increased to improve voltage distribution, then the voltage consistency is improved, but the resolution of the panel deteriorates due to limited channels
Solution Approach 1:
The patent changes the parameter of touch trace configuration from a fixed uniform distribution to a variable distribution based on position. By adjusting the number of traces per electrode according to local voltage requirements, the system achieves better voltage consistency without uniformly increasing the total trace count, thereby preserving resolution quality while addressing voltage distribution issues.
3Device complexity
If different numbers of touch traces are connected to different touch electrodes, then the device complexity is reduced, but the voltage distribution uniformity deteriorates causing display unevenness
Solution Approach 1:
The patent implements local quality optimization by strategically assigning different numbers of touch traces to different electrodes based on their position in the display. This localized differentiation allows the system to maintain simpler overall configuration while achieving better display uniformity by addressing voltage distribution issues in specific problem areas rather than applying complex uniform solutions across the entire panel.
Data Source
AI summary
A thin film transistor array substrate and a touch display panel are provided, including a plurality of touch electrodes. The touch electrodes include a first touch electrode, a second touch electrode, and a third touch electrode arranged along a first direction. A number of the touch traces electrically connected between the second touch electrode and the first common power line is greater than or equal to a number of the touch traces electrically connected between the first touch electrode and the first common power line, and is less than a number of the touch traces electrically connected between the third touch electrode and the first common power line.