Touch Electrode Via Hole Offset Design

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Solution Overview

Problem

Existing display panels with touch electrodes near the edges are prone to disconnection due to the close proximity of apertures, leading to adverse effects on display and touch functionality.

Innovation Solution

The display panel design includes a touch electrode layer with via holes that are deviated by more than 1 μm from the edge of the touch electrode, reducing the likelihood of disconnection and improving the display and touch effects by maintaining electrical continuity.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If apertures are placed close to edges of touch electrode to achieve connection between pixel electrode and drain electrode, then connection is achieved, but the touch electrode may be broken at edges

Engineering Contradiction:

Improvetouch electrode connection reliabilityVSAvoidedge breakage risk

Core Design Contradiction:

ReliabilityVSObject-affected harmful factors

Solution Approach 1:

The patent applies preliminary action by pre-positioning the aperture at a safe distance from the edge (more than 1 μm offset) before any potential breakage can occur. This proactive design ensures that the aperture is already in a protected position that prevents edge breakage while maintaining electrical connection functionality.

Inventive Principle:

Principle #10Preliminary action

Solution Approach 2:

The patent introduces an intermediary offset distance between the aperture and the edge of the touch electrode. This intermediate positioning (more than 1 μm away from edge) acts as a buffer zone that protects the aperture from edge-related failures while still allowing the aperture to fulfill its connection function between the pixel electrode and drain electrode.

Inventive Principle:

Principle #24Intermediary (Mediator)

2Reliability

If aperture is positioned away from edge by more than 1 μm to prevent breakage, then reliability improves, but precise alignment becomes more difficult

Engineering Contradiction:

Improvetouch electrode connection reliabilityVSAvoidvia hole alignment precision

Core Design Contradiction:

ReliabilityVSManufacturing precision

Solution Approach 1:

The patent changes the positional parameter of the aperture relative to the edge, specifying an offset distance of more than 1 μm. This parameter modification creates a design space that balances reliability improvement with manufacturing feasibility, allowing sufficient margin for alignment errors while maintaining connection integrity.

Inventive Principle:

Principle #35Parameter changes

Data Source

PatentUS10429980B2Display panel and display device

Publication Date: 2019.10.01 XIAMEN TIANMA MICRO ELECTRONICS

AI summary

A display panel and a display device. The display panel includes sub-pixels, an insulation layer including a first via hole, a flat layer including a second via hole, and a touch electrode including a third via hole overlapping the first via hole, the edge of each touch electrode in the first direction is between adjacent sub-pixels, each first sub-pixel is adjacent to the edge of the touch electrode; in the first direction, a center point of the first via hole is deviated by more than 1 μm away from a first edge relative to a center point of the second via hole, a center point of the third via hole is deviated by more than 1 μm away from the first edge relative to the center point of the second via hole, and the first edge is an edge of a closest touch electrode to the first sub-pixel in the first direction.