Display Panel Link Line Metal Layer for Pad-Area Defect Resistance

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Solution Overview

Problem

Existing display panels face defects in link lines, particularly in non-active areas, which can affect the overall performance and reliability of display devices.

Innovation Solution

A display panel design that includes a metal layer on the link line disposed between at least two pads in the non-active area, minimizing defects and enhancing reliability.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If a link line is disposed between pads in the non-active area, then electrical connection is achieved, but defects may occur in the link line

Engineering Contradiction:
Improvelink line reliabilityVSAvoiddefects in link line
Core Design Contradiction:
ReliabilityVSObject-affected harmful factors

Solution Approach 1:

A metal layer is introduced as an intermediary protective element disposed over the link line in the non-active area. This metal layer acts as a mediator that protects the link line from defects while maintaining electrical connectivity between pads, thereby improving reliability without compromising the link line's function

Inventive Principle:
Principle #24Intermediary (Mediator)

2Reliability

If a metal layer is added on the link line, then defect resistance is improved, but device complexity increases

Engineering Contradiction:
Improvedefect resistanceVSAvoidstructure complexity
Core Design Contradiction:
ReliabilityVSDevice complexity

Solution Approach 1:

The metal layer is selectively disposed only in the non-active area over the link line, rather than uniformly across the entire device. This localized approach provides defect resistance where needed while minimizing the increase in overall device complexity and material usage

Inventive Principle:
Principle #3Local quality

Data Source

PatentUS12268065B2Display panel and display device including the same
Publication Date: 2025.04.01 LG DISPLAY CO LTD
  • US12268065B2 patent drawing
  • US12268065B2 patent drawing
  • US12268065B2 patent drawing

AI summary

A display panel includes an active area in which a plurality of pixels is disposed; and a non-active area including a plurality of pads connected to the active area, the plurality of pads includes a first pad and a second pad which are spaced apart from each other with a first distance therebetween in a first direction and a third pad which is spaced apart from the first pad or the second pad with a second distance therebetween in a second direction, a link line connected to the third pad is disposed between the first pad and the second pad, and a metal layer may be disposed on the link line.