Display Substrate Conductive Shielding Layer Signal Interference
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
In display substrates, signal interference occurs between touch electrode lines and other signal lines due to gaps between power supply voltage lines and common connection lines, leading to poor display and touch performance.
Innovation Solution
A display substrate design with a conductive layer configured to receive a fixed signal, overlapping with the gap between power supply and common connection lines, and touch electrode lines with a first wire and second wire separated by an insulating layer, electrically connected through a conductive via hole, to reduce signal interference.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If a gap is provided between power supply voltage lines and common connection lines, then manufacturing flexibility is improved, but signal interference occurs between touch electrode lines and other signal lines
Solution Approach 1:
A conductive layer is introduced as an intermediary element between the power supply voltage lines and common connection lines. This conductive layer, positioned in the gap region, acts as a shielding structure that blocks electromagnetic interference between adjacent signal lines while preserving the manufacturing flexibility provided by the gap structure.
Solution Approach 2:
The gap structure, which initially causes signal interference, is converted into a beneficial shielding structure by filling it with conductive material. The same spatial region that caused harm (signal interference) is transformed into a solution (electromagnetic shielding) by introducing the conductive layer in the gap area.
2Area of stationary object
If touch electrode lines are placed close to power supply lines for compact design, then device area is reduced, but signal interference increases
Solution Approach 1:
The conductive layer serves as a shielding intermediary between touch electrode lines and power supply lines. By positioning this conductive layer in the gap region, electromagnetic interference is blocked, allowing compact layout of signal lines without sacrificing signal integrity.
Solution Approach 2:
Instead of separating signal lines in the planar dimension (which would increase device area), the solution introduces a vertical dimension by adding the conductive layer in the gap region. This vertical shielding structure provides interference protection without increasing the horizontal footprint of the device.
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
The conductive layer shields signal interference, improving display and touch performance by reducing signal line interactions, and facilitates manufacturing by being formed in the same layer as the touch electrode lines.
Implementation Method 1
a conductive layer on a side of the first insulating layer away from the gap, the conductive layer being configured to receive a fixed signal, and an orthographic projection of the conductive layer on the base substrate at least partially overlapping with an orthographic projection of the gap on the base substrate
Data Source
AI summary
The present disclosure provides a display substrate and a manufacturing method therefor, and a display device. The display substrate includes: a substrate base, including a first region and a second region; a plurality of sub-pixels, at least one sub-pixel including a light-emitting element including a first electrode, a light-emitting layer, and a second electrode; a plurality of first power lines electrically connected to the first electrode; a first power bus electrically connected to the plurality of first power lines; a second power line electrically connected to the second electrode and including a first portion and a second portion, a gap existing between the second portion of the second power line and the first power bus; a first insulating layer covering the first power bus, the second power line, and the gap; a conductive layer on the first insulating layer; and a plurality of touch electrode lines.