Touch Display Panel Trace Layout for Uniform Signal Transmission
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Solution Overview
Problem
The uniformity of signals transmitted by touch lines in touch display panels is adversely affected due to varying resistances and capacitances caused by different lengths and cross-sectional areas of touch lines, leading to reduced touch accuracy.
Innovation Solution
The touch display panel design includes touch lines with varying cross-sectional areas and lengths, with specific ratios and through holes in the conductive layer to maintain consistent resistances and parasitic capacitances, ensuring uniform signal transmission and improved touch accuracy.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If touch lines have different lengths and cross-sectional areas to accommodate varying paths, then the layout flexibility and connectivity are improved, but the resistance and capacitance uniformity deteriorate, leading to reduced touch accuracy
Solution Approach 1:
The patent applies local quality by making different parts of the touch line structure have different properties. Specifically, the conductive layer has different opening areas at different locations corresponding to different touch lines, allowing each touch line to have customized resistance and capacitance characteristics while maintaining overall uniformity in signal transmission.
Solution Approach 2:
The patent changes physical parameters of the conductive layer by creating through holes with different opening areas. This parameter change allows the touch lines with different lengths and cross-sectional areas to achieve uniform resistance and capacitance values, thereby maintaining touch accuracy while preserving layout flexibility.
2Reliability
If through holes in the conductive layer have different opening areas to compensate for touch line variations, then the resistance and capacitance uniformity are improved, but the manufacturing precision requirements increase
Solution Approach 1:
The patent introduces the conductive layer with through holes as an intermediary element between the touch lines and the substrate. By adjusting the opening areas of these through holes, the patent compensates for variations in touch line lengths and cross-sectional areas, achieving uniform signal transmission while providing a manufacturable approach through standard photolithography processes.
Data Source
AI summary
The present disclosure provides a touch display panel. The touch display panel includes a display substrate and a touch layer, wherein the touch layer includes a plurality of touch units and a plurality of touch lines which are disposed on the display substrate; wherein the touch lines are connected to at least one touch unit and are configured to electrically connect the touch unit connected thereto to a touch integrated circuit; the plurality of touch lines at least include a first trace and a second trace which are disposed in a non-display region; and the display substrate includes a conductive layer disposed in the non-display region; wherein a plurality of first through hole and a plurality of second through hole are defined in the conductive layer.