Touch Display Routing Layout for Reduced Line Load
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Solution Overview
Problem
Existing touch display devices face challenges in improving touch sensing performance without compromising image display performance, particularly due to the limited space and increased load on touch routing lines.
Innovation Solution
The touch display device incorporates a touch sensor structure with divided active areas, including auxiliary routing patterns and touch electrodes, which reduce the area occupied by touch routing lines and alleviate the load on these lines.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If the active area of the display panel is increased, then the display performance is improved, but the area occupied by touch routing lines increases and the load on routing lines increases
Solution Approach 1:
The touch sensing area is divided into first and second sub-areas, with touch electrodes and routing lines distributed across both sub-areas. This segmentation allows the routing lines to be spread out and share the load, preventing any single routing line from becoming overloaded while maintaining a large overall active area for touch sensing.
2Area of stationary object
If the area occupied by touch routing lines is reduced, then the touch sensing area is increased, but the routing line density increases
Solution Approach 1:
The routing lines are arranged to extend in both the first and second directions across the display panel, utilizing two-dimensional space rather than confining them to a single direction. This dimensional approach allows routing lines to distribute touch sensing signals more efficiently across the expanded active area without excessive density in any one location.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This configuration enhances touch sensing performance by reducing the load on touch routing lines, allowing for improved sensitivity and efficiency even as the active area increases.
Implementation Method 1
The display devices can drive the plurality of touch electrodes, and can sense the touch of the user by detecting a change of a capacitance generated when the user touches the display panel.
Data Source
AI summary
A touch display device is disclosed. By arranging a part of a touch routing line for a driving of a touch electrode on an active area and electrically connecting the touch routing line to an auxiliary routing pattern that overlaps the touch routing line, an area where the touch routing line is disposed and a load of the touch routing line can be reduced.