Transparent Electrode Bridge Layout for Touch Display Isolation

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Solution Overview

Problem

Existing display devices face challenges in maintaining high display quality while integrating touch sensing capabilities, particularly due to issues with light leakage and potential short-circuiting between electrodes, which degrade the contrast and overall performance.

Innovation Solution

The display device incorporates a specific layout and material configuration for the electrodes, including a bridge portion that integrates common electrodes and transparent electrodes, with through-holes and insulating films to prevent light leakage and short-circuiting, ensuring effective touch sensing and display functionality.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Adaptability or versatility

If a touch sensor with common electrodes and sensor electrodes is integrated into the display panel, then touch sensing capability is achieved, but light leakage occurs between electrodes degrading display quality

Engineering Contradiction:

Improvetouch sensing capabilityVSAvoidlight leakage

Core Design Contradiction:

Adaptability or versatilityVSObject-affected harmful factors

Solution Approach 1:

The electrode structure is divided into distinct common electrodes and sensor electrodes with separate through-holes. The common electrode through-hole is positioned in a first region while the sensor electrode through-hole is positioned in a second region, preventing light leakage between electrode types while maintaining touch sensing functionality.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

An insulating film is introduced as an intermediary layer between the common electrode and sensor electrode. This insulating film prevents direct contact and light leakage between the electrodes while allowing the touch sensor to function properly through the through-holes in the insulating film.

Inventive Principle:

Principle #24Intermediary (Mediator)

2Area of stationary object

If electrodes are positioned close to each other for compact design, then device area is reduced, but short-circuiting between electrodes becomes possible

Engineering Contradiction:

Improvedisplay panel areaVSAvoidelectrode isolation

Core Design Contradiction:

Area of stationary objectVSReliability

Solution Approach 1:

An insulating film is positioned between the common electrode and sensor electrode to prevent short-circuiting. This allows the electrodes to be placed close together for compact design while the insulating film ensures electrical isolation and reliability.

Inventive Principle:

Principle #24Intermediary (Mediator)

Solution Approach 2:

The electrode structure is segmented into separate common electrodes and sensor electrodes with dedicated through-holes. This segmentation prevents short-circuiting by ensuring proper spacing and isolation between different electrode types while maintaining a compact overall design.

Inventive Principle:

Principle #1Segmentation

3Device complexity

If a single through-hole is used for both common electrode and sensor electrode connections, then manufacturing complexity is reduced, but light leakage and short-circuiting risks increase

Engineering Contradiction:

Improvethrough-hole structureVSAvoidlight leakage and short-circuiting

Core Design Contradiction:

Device complexityVSObject-affected harmful factors

Solution Approach 1:

The through-hole structure is segmented into a first through-hole for the common electrode and a second through-hole for the sensor electrode. This segmentation eliminates light leakage and short-circuiting risks by ensuring separate pathways for each electrode type, while the overall structure remains relatively simple for manufacturing.

Inventive Principle:

Principle #1Segmentation

4Illumination intensity

If transparent electrodes are used to maintain display quality, then light transmission is improved, but the risk of light leakage and short-circuiting increases

Engineering Contradiction:

Improvelight transmissionVSAvoidelectrode isolation

Core Design Contradiction:

Illumination intensityVSReliability

Solution Approach 1:

An insulating film is positioned between transparent electrodes to prevent short-circuiting and light leakage. This allows the transparent electrodes to maintain high light transmission for good display quality while the insulating film ensures electrical isolation and prevents harmful light leakage between electrode regions.

Inventive Principle:

Principle #24Intermediary (Mediator)

Data Source

PatentUS20260072315A1Display device

Publication Date: 2026.03.12 MAGNOLIA WHITE CORP

AI summary

According to one embodiment, a display device includes a first drain electrode, a first insulating film which is organic, a first metal electrode in contact with the first drain electrode in a first through-hole of the first insulating film, a second insulating film which is organic, a first transparent electrode in contact with the first metal electrode in a second through-hole of the second insulating film and formed of a transparent conductive material, a third insulating film which is inorganic, a pixel electrode in contact with the first transparent electrode in a third through-hole of the third insulating film and a metal wire located between the first insulating film and the second insulating film and formed of a material identical to that of the first metal electrode.