Display Line Layout for Electrostatic Discharge Resistance

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Solution Overview

Problem

Display devices are prone to line disconnection in the display area due to electrostatic discharge, particularly affecting areas where scanning lines and auxiliary capacitance lines are adjacent, leading to potential short circuits.

Innovation Solution

The display device incorporates specific line configurations, including first and second lines with varying widths and insulating films, along with contact holes, to ensure continuity and minimize electrostatic discharge effects, using conductive films and insulating layers to maintain line integrity.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If discharge projections are added to adjacent first electrode lines, then short circuit resistance is improved, but line disconnection risk in the display area increases due to electrostatic discharge

Engineering Contradiction:

Improveshort circuit resistanceVSAvoidline disconnection risk

Core Design Contradiction:

ReliabilityVSObject-affected harmful factors

Solution Approach 1:

The patent applies different line width configurations to different sections of the same conductive film. Specifically, the first line has a first line width in the display area and a second line width (wider) in the non-display area, while the second line has a third line width in the non-display area. This local variation in width provides electrostatic discharge protection in the non-display area without affecting the display quality in the display area.

Inventive Principle:

Principle #3Local quality

Solution Approach 2:

The patent addresses the two-dimensional problem of line disconnection by introducing a width dimension variation. By making the line width variable (narrower in display area, wider in non-display area), the patent creates a three-dimensional structural solution that protects against electrostatic discharge while maintaining display functionality.

Inventive Principle:

Principle #17Another dimension (Dimensionality change)

2Reliability

If line width is increased in non-display area for electrostatic protection, then electrostatic discharge resistance is improved, but manufacturing complexity increases due to variable width requirements

Engineering Contradiction:

Improveelectrostatic discharge resistanceVSAvoidmanufacturing complexity

Core Design Contradiction:

ReliabilityVSEase of manufacture

Solution Approach 1:

The patent divides the non-display area into multiple sections with different line width configurations. The first line has a second line width portion, while the second line has a third line width portion. This segmentation allows each line to be optimized independently for electrostatic protection while simplifying the overall manufacturing process by using standard photolithography patterns.

Inventive Principle:

Principle #1Segmentation

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 configuration significantly reduces the likelihood of line disconnection in the display area, enhancing the device's resistance to electrostatic discharge and maintaining image stability.

Implementation Method 1

a first insulating film included in a layer upper than the first conductive film... The third line crosses the first line section via the first insulating film

Methodology Applied

Scientific EffectElectrical insulation: Dielectric

Implementation Method 2

The first insulating film may include a first contact hole in a portion that overlaps the third line and the first line section. The third line and the first line section may be connected via the first contact hole.

Methodology Applied

Scientific EffectElectrical conduction: Conduction (electrical)

Implementation Method 3

The second line section includes a first end portion, a first width portion, and a second width portion. The first end portion is spaced from the second line in the first direction. The first width portion is closer to the first line section with respect to the first direction than the first end portion is. The second width portion is continuous to the first width portion and narrower than the first width portion.

Methodology Applied

Scientific EffectElectrostatic discharge protection: Electrostatic Discharge

Data Source

PatentUS20250389998A1Display device

Publication Date: 2025.12.25 SHARP DISPLAY TECHNOLOGY CORP

AI summary

A display device includes a first line extending along a first direction in a display area and a non-display area and a second line extending in the non-display area along a second direction crossing the first direction. The first and second lines are different portions of the first conductive film. The first line includes a first line section in the display area and a second line section in the non-display area. The second line section includes a first end portion, a first width portion, and a second width portion. The first end portion is spaced from the second line in the first direction. The first width portion is closer to the first line section with respect to the first direction than the first end portion is. The second width portion is continuous to the first width portion and narrower than the first width portion.