Touch Panel Wiring Layout for Low RC Load on Large Displays
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Solution Overview
Problem
As touch display panels increase in size, the length of signal transmission lines increases, leading to higher resistive-capacitive loads that degrade control accuracy and touch precision.
Innovation Solution
The touch display panel design includes a signal transmission wiring layer with multiple signal transmission lines connected in parallel to each touch electrode, featuring connection lines between and around the transmission lines to reduce resistance and capacitive load.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If the touch display panel size is increased, then the display area is improved, but the signal transmission line length increases causing higher resistive-capacitive loads and degraded control accuracy
Solution Approach 1:
The signal transmission wiring layer is divided into multiple signal transmission line groups, where each group contains multiple signal transmission lines that are electrically connected in parallel to a single touch electrode. This segmentation approach reduces the resistive-capacitive load on each individual transmission line, thereby maintaining control accuracy even as the display panel size increases.
2Measurement precision
If multiple signal transmission lines are connected in parallel to each touch electrode, then the resistive-capacitive load is reduced, but the device complexity increases
Solution Approach 1:
Multiple signal transmission lines that are electrically connected in parallel to the same touch electrode are merged into a single signal transmission line group. This merging approach simplifies the overall wiring structure while maintaining the benefits of parallel connection, including reduced resistive-capacitive load and improved control accuracy.
Data Source
AI summary
The touch display panel provided by the present application includes a touch electrode wiring layer, which comprises a plurality of touch electrodes arranged in an array, and a signal transmission wiring layer, which is arranged on one side of the touch electrode wiring layer. The signal transmission wiring layer includes a plurality of touch electrodes. Each signal transmission line group is electrically connected to the plurality of touch electrodes in one-to-one correspondence. The signal transmission line group includes at least two signal transmission lines arranged at intervals, and the at least two signal transmission lines are electrically connected to the corresponding touch electrodes.