OLED Touch Electrode Layout to Reduce Display Panel Dead Zones

Solution Overview

Problem

OLED display panels face reduced touch accuracy due to large touch dead zones caused by the arrangement of touch electrode portions and connecting leads, leading to decreased touch performance.

Innovation Solution

The display panel design includes touch electrodes with portions arranged at intervals in a specific direction, with leads connected to the ends of these portions, reducing the need for extensive connecting structures and minimizing the distance between electrodes, thereby enhancing touch accuracy and performance.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Device complexity

If touch electrode portions are arranged at intervals in the first direction and leads are connected to middle portions, then the structure is simplified, but touch accuracy is reduced due to increased touch dead zones

Engineering Contradiction:

Improvestructure complexityVSAvoidtouch accuracy

Core Design Contradiction:

Device complexityVSMeasurement precision

Solution Approach 1:

The patent inverts the conventional connection approach by connecting touch leads to the ends of touch electrode portions rather than to their middle portions. This inversion eliminates the need for leads to extend through the entire electrode portion, thereby reducing touch dead zones and improving touch accuracy while maintaining structural simplicity.

Inventive Principle:

Principle #13The other way round (Inversion)

Solution Approach 2:

The patent changes the spatial arrangement by positioning touch leads in the second direction (perpendicular to the first direction) and connecting them to the ends of touch electrode portions. This dimensional reorganization allows leads to be located in the first spacings between adjacent touch electrodes, reducing interference and improving touch sensitivity without increasing overall structure complexity.

Inventive Principle:

Principle #17Another dimension (Dimensionality change)

2Ease of manufacture

If touch leads are extended to connect to middle portions of touch electrode portions, then connection is achieved, but touch dead zones increase and touch performance decreases

Engineering Contradiction:

Improveconnection feasibilityVSAvoidtouch performance

Core Design Contradiction:

Ease of manufactureVSReliability

Solution Approach 1:

The patent inverts the conventional connection approach by connecting touch leads to the ends of touch electrode portions rather than to their middle portions. This inversion eliminates the need for leads to extend through the entire electrode portion, thereby reducing touch dead zones and improving touch accuracy while maintaining structural simplicity.

Inventive Principle:

Principle #13The other way round (Inversion)

Solution Approach 2:

The patent segments the touch electrode portions into distinct regions with leads connecting to the ends rather than the middle. This segmentation allows the touch electrode portions to be independently optimized for touch sensitivity while the leads are positioned to minimize interference, thereby improving overall touch performance without compromising connection feasibility.

Inventive Principle:

Principle #1Segmentation

3Quantity of substance

If touch electrode portions are arranged close together, then touch density is increased, but the distance between leads and electrodes increases, affecting touch sensitivity

Engineering Contradiction:

Improvetouch electrode densityVSAvoidtouch sensitivity

Core Design Contradiction:

Quantity of substanceVSMeasurement precision

Solution Approach 1:

The patent changes the spatial arrangement by positioning touch leads in the second direction (perpendicular to the first direction) and connecting them to the ends of touch electrode portions. This dimensional reorganization allows leads to be located in the first spacings between adjacent touch electrodes, reducing interference and improving touch sensitivity without increasing overall structure complexity.

Inventive Principle:

Principle #17Another dimension (Dimensionality change)

Solution Approach 2:

The patent applies local quality optimization by ensuring that touch leads are positioned in specific locations (in the first spacings between adjacent touch electrodes) where they can connect to the ends of touch electrode portions. This localized positioning minimizes the distance between leads and electrodes while maintaining high touch electrode density, thereby improving touch sensitivity.

Inventive Principle:

Principle #3Local quality

Data Source

PatentUS20260072535A1Display panel and display device

Publication Date: 2026.03.12 KUNSHAN GO VISIONOX OPTO ELECTRONICS CO LTD

AI summary

The present application relates to a display panel and a display device. The display panel includes: a substrate, a light-emitting functional layer, a plurality of touch electrodes, and a plurality of touch leads, where the light-emitting functional layer includes a light-emitting layer and a first electrode layer; each of the touch electrodes includes a plurality of touch electrode portions; there is a first spacing between two of the touch electrodes disposed adjacent to each other in a first direction; at least part of the touch leads extend in a second direction, and are located in the first spacings; and the touch leads are connected to corresponding ends of the plurality of touch electrode portions of the corresponding touch electrodes.