Input Sensor Pad Layout for Display Sealing Without Laser Reflection

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Solution Overview

Problem

Manufacturing defects in display devices, particularly affecting input sensors, occur due to the compromise of the sealing member during curing processes when metal is present near the input sensor, compromising durability.

Innovation Solution

The display device design includes a specific arrangement of the input sensor's sensing pad and sealing member, with a predetermined distance and orientation relative to the edge of the display panel, using a transparent conductive oxide for the second pad and metal for the first pad, and insulating layers to ensure effective curing of the sealing member without interference.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If the first pad includes metal to ensure electrical connection and conductivity, then electrical conductivity is improved, but laser reflection occurs during curing process compromising sealing member durability

Engineering Contradiction:

Improveelectrical conductivityVSAvoidlaser reflection

Core Design Contradiction:

ReliabilityVSObject-affected harmful factors

Solution Approach 1:

The patent extracts the metal component from the first pad by introducing a first hole that removes the metal portion from the sealing area, allowing the sealing member to be cured without reflection interference while maintaining electrical conductivity through alternative pathways

Inventive Principle:

Principle #2Taking out (Extraction)

Solution Approach 2:

The patent introduces a first insulating layer as an intermediary between the metal first pad and the sealing member, preventing direct contact and laser reflection while maintaining electrical connection through the insulating layer and contact holes

Inventive Principle:

Principle #24Intermediary (Mediator)

2Area of stationary object

If the sealing area is positioned close to the edge to reduce dead space and increase display area, then display area is improved, but the curing process is compromised by metal reflection

Engineering Contradiction:

Improvedisplay areaVSAvoidsealing member curing

Core Design Contradiction:

Area of stationary objectVSReliability

Solution Approach 1:

The patent removes the metal portion from the sealing area by introducing a first hole, enabling the sealing member to be cured at positions close to the edge without reflection interference, thus maximizing display area while ensuring curing reliability

Inventive Principle:

Principle #2Taking out (Extraction)

Solution Approach 2:

The patent creates a virtual representation of the metal pad's electrical function through the first insulating layer and contact holes, allowing the sealing member to be positioned close to the edge without direct metal contact, thus maximizing display area while maintaining electrical conductivity

Inventive Principle:

Principle #26Copying

3Area of stationary object

If the first pad extends to the edge of the display panel to maximize utilization, then space utilization is improved, but laser reflection during curing compromises sealing durability

Engineering Contradiction:

Improvespace utilizationVSAvoidsealing member durability

Core Design Contradiction:

Area of stationary objectVSDuration of action of stationary object

Solution Approach 1:

The patent extracts the metal from the sealing area by introducing a first hole, allowing the first pad to extend to the edge for maximum space utilization while preventing laser reflection that would compromise sealing member durability

Inventive Principle:

Principle #2Taking out (Extraction)

Solution Approach 2:

The patent introduces a first insulating layer as an intermediary between the metal first pad and the sealing member, enabling the pad to extend to the edge for maximum utilization while protecting the sealing member from laser reflection during curing

Inventive Principle:

Principle #24Intermediary (Mediator)

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

This design maintains the durability of the display device by preventing laser reflection from the metal pads, ensuring proper sealing and reducing dead space, allowing for a wider display area with secure adhesion.

Implementation Method 1

The second pad may include a transparent conductive oxide

Methodology Applied

Scientific EffectLaser transmission through transparent conductive oxide: Photoconductivity

Implementation Method 2

preventing laser reflection from the metal pads

Methodology Applied

Scientific EffectLaser reflection from metal: Reflection

Data Source

PatentUS20250366342A1Display device and electronic device

Publication Date: 2025.11.27 SAMSUNG DISPLAY CO LTD

AI summary

Disclosed is a display device including a display panel including a first base substrate, a second base substrate, and a sealing member, and an input sensor and including an active area, a pad area, and a sealing area, wherein the input sensor includes a sensing electrode that senses an input, a sensing pad overlapping the pad area and including a first pad and a second pad, and a sensing line, the sealing area extends in a first direction parallel to an edge of the display panel and is positioned a predetermined distance from the edge in a second direction intersecting the first direction, the first pad includes a first portion extending parallel to the second direction and a second portion extending parallel to the first direction, and the second portion is disposed at least the predetermined distance from the edge of the display panel.