Display Routing Shield Layout for Narrow Bezel Touch Sensing
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Solution Overview
Problem
Flat panel display devices have a significant bezel area that increases the size of the product and degrades its appearance, and there are issues with signal interference in routing lines affecting touch sensitivity and power consumption.
Innovation Solution
The display device incorporates a substrate with a display area and non-display area, featuring sensing lines, routing lines, a ground line, and a shielding pattern that overlaps routing and gate control lines to minimize bezel area, reduce signal interference, and enhance touch sensitivity while optimizing power consumption.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If the bezel area is reduced to minimize product size and improve appearance, then the display area ratio increases, but signal interference between routing lines and gate control lines increases
Solution Approach 1:
A shielding pattern is introduced as an intermediary element between the routing line and gate control line. This shielding pattern, connected to the ground line, acts as a mediator that blocks electromagnetic interference between the routing line and gate control line, allowing the bezel area to be minimized without compromising signal integrity.
Solution Approach 2:
The harmful electromagnetic field interaction is extracted and isolated by introducing the shielding pattern. The shielding pattern captures and redirects the interfering signals away from the routing line, separating the signal paths and preventing coupling between the routing line and gate control line.
2Area of stationary object
If routing lines are positioned closer to gate control lines to reduce bezel area, then the display area ratio increases, but touch sensitivity decreases due to signal interference
Solution Approach 1:
The shielding pattern serves as a mediator between the routing line and gate control line, blocking electromagnetic interference that would otherwise affect touch sensing. This allows routing lines to be positioned closer to gate control lines without degrading touch sensitivity, thereby reducing the bezel area.
3Area of stationary object
If routing lines are positioned closer to gate control lines to minimize bezel area, then the display area ratio increases, but power consumption increases
Solution Approach 1:
The shielding pattern acts as an intermediary that prevents electromagnetic coupling between the routing line and gate control line. This reduces parasitic capacitance and leakage current, thereby lowering power consumption while allowing the routing lines to be positioned closer to gate control lines for a minimized bezel area.
Data Source
AI summary
A display device includes a substrate including a display area and a non-display area; a plurality of sub-pixels provided in the display area and arranged in a first direction and a second direction; a first sensing line and a second sensing line provided in the display area; and a first routing line and a second routing line provided in the non-display area, extending in the first direction, and electrically connected to the first sensing line and the second sensing line, respectively; a gate control line provided in the non-display area and extending in the second direction; a ground line provided in the non-display area and extending in the first direction; and a shielding pattern connected to the ground line, wherein the shielding pattern overlaps the first routing line and the gate control line and is disposed between the first routing line and the gate control line in a thickness direction.