Display Cladding Pattern Prevents Metal Wiring Visibility

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Solution Overview

Problem

Existing display apparatuses with conductive patterns suffer from visibility issues due to external light reflection on the side surfaces of the wiring, making the metal pattern visible to users.

Innovation Solution

A display apparatus is designed with a conductive pattern that includes a first insulating layer, a conductive pattern directly on the insulating layer, a cladding pattern on the side surfaces of the conductive pattern, and a second insulating layer on top. The cladding pattern consists of a first cladding layer made of metal and a second cladding layer made of silicon, which are formed using specific etching techniques to cover the inclined side surfaces of the conductive pattern layers.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If the thickness of the conductive pattern increases to improve input sensitivity, then input sensitivity is improved, but external light reflects on side surfaces making the metal pattern visible

Engineering Contradiction:
Improveinput sensitivityVSAvoidvisibility due to light reflection
Core Design Contradiction:
ReliabilityVSObject-affected harmful factors

Solution Approach 1:

A cladding pattern is introduced as an intermediary structure between the conductive pattern and the external environment. This cladding pattern covers the side surfaces of the conductive pattern, preventing direct exposure to light while maintaining the electrical functionality. The cladding acts as a mediator that blocks the harmful light reflection path without interfering with the conductive pattern's input sensing capability.

Inventive Principle:
Principle #24Intermediary (Mediator)

Solution Approach 2:

The solution transitions from a two-dimensional planar conductive pattern to a three-dimensional structure by adding vertical cladding layers. The cladding pattern extends in the thickness direction (z-axis) to cover the side surfaces, creating a multi-layered structure that addresses the visibility issue in the vertical dimension while preserving the horizontal electrical connectivity.

Inventive Principle:
Principle #17Another dimension (Dimensionality change)

2Object-affected harmful factors

If a cladding pattern is added to cover side surfaces to prevent visibility, then visibility is prevented, but device complexity increases

Engineering Contradiction:
Improvevisibility preventionVSAvoidstructure complexity
Core Design Contradiction:
Object-affected harmful factorsVSDevice complexity

Solution Approach 1:

The cladding pattern is segmented into multiple distinct layers: a first cladding layer in direct contact with the conductive pattern and a second cladding layer on top of the first. This segmentation allows each layer to serve specific functions - the first layer provides immediate coverage of side surfaces while the second layer enhances the blocking effect. The segmented structure achieves better visibility prevention with controlled complexity through functional differentiation.

Inventive Principle:
Principle #1Segmentation

Solution Approach 2:

The cladding pattern employs composite material structure with different materials for different layers. The first cladding layer uses a material with appropriate adhesion to the conductive pattern, while the second cladding layer uses a different material optimized for light blocking. This composite approach allows optimization of each layer's properties for its specific function, achieving effective visibility prevention while managing overall device complexity.

Inventive Principle:
Principle #40Composite materials

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 effectively prevents the metal pattern from being visible to users due to external light reflection, while maintaining improved input sensitivity and structural integrity of the display apparatus.

Implementation Method 1

external light may be reflected on side surfaces of the wiring so that the metal pattern may be visible to a user

Methodology Applied
Scientific EffectLight reflection prevention: Reflection

Data Source

PatentUS12333116B2Display apparatus and method of manufacturing the same
Publication Date: 2025.06.17 SAMSUNG DISPLAY CO LTD
  • US12333116B2 patent drawing
  • US12333116B2 patent drawing
  • US12333116B2 patent drawing

AI summary

A display apparatus includes a first insulating layer, a conductive pattern disposed directly on the first insulating layer, a cladding pattern disposed on side surfaces of the conductive pattern, and a second insulating layer on the conductive pattern and the cladding pattern, wherein the cladding pattern includes a first cladding layer including a first material and a second cladding layer including a second material different from the first material.