Display Wiring Layout for Light Transmittance and Low Resistance

Solution Overview

Problem

Display devices face challenges in maintaining high display quality while incorporating additional components, such as cameras or sensors, due to the integration of auxiliary light-emitting elements and pixel circuits, which can affect light transmittance and increase sheet resistance in the connecting wiring.

Innovation Solution

The display device incorporates a substrate with a main display area, a component area, and a non-display area, featuring an auxiliary light-emitting element in the component area, an auxiliary pixel circuit in the non-display area, and a connecting wiring with specific layers of transparent conductive oxides and silver alloys to improve light transmittance and reduce sheet resistance.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Adaptability or versatility

If auxiliary light-emitting elements and pixel circuits are integrated into the display device, then additional functions can be added, but light transmittance decreases and sheet resistance increases

Engineering Contradiction:

Improveadditional functionsVSAvoidlight transmittance

Core Design Contradiction:

Adaptability or versatilityVSIllumination intensity

Solution Approach 1:

The connecting wiring is divided into three distinct portions: a first portion (transparent conductive oxide) in the main display area, a second portion (silver alloy) in the component area, and a third portion (transparent conductive oxide) in the non-display area. This segmentation allows each portion to be optimized for its specific function, maintaining light transmittance where needed while providing low resistance where components are located.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

Different materials are used in different areas of the connecting wiring based on local requirements. Transparent conductive oxide is used in areas requiring light transmittance (main display and non-display areas), while silver alloy is used in the component area where low resistance is prioritized and light transmittance is less critical.

Inventive Principle:

Principle #3Local quality

2Adaptability or versatility

If auxiliary light-emitting elements and pixel circuits are integrated into the display device, then additional functions can be added, but sheet resistance increases

Engineering Contradiction:

Improveadditional functionsVSAvoidsheet resistance

Core Design Contradiction:

Adaptability or versatilityVSReliability

Solution Approach 1:

The connecting wiring employs a composite structure combining three different materials: transparent conductive oxide (first and third portions) and silver alloy (second portion). This composite approach leverages the high transmittance of TCO in display areas and the low resistance of silver alloy in the component area, achieving both optical and electrical performance requirements simultaneously.

Inventive Principle:

Principle #40Composite materials

3Illumination intensity

If transparent conductive oxide is used in the connecting wiring, then light transmittance improves, but sheet resistance increases

Engineering Contradiction:

Improvelight transmittanceVSAvoidsheet resistance

Core Design Contradiction:

Illumination intensityVSReliability

Solution Approach 1:

The connecting wiring is divided into three distinct portions: a first portion (transparent conductive oxide) in the main display area, a second portion (silver alloy) in the component area, and a third portion (transparent conductive oxide) in the non-display area. This segmentation allows each portion to be optimized for its specific function, maintaining light transmittance where needed while providing low resistance where components are located.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

Different materials are used in different areas of the connecting wiring based on local requirements. Transparent conductive oxide is used in areas requiring light transmittance (main display and non-display areas), while silver alloy is used in the component area where low resistance is prioritized and light transmittance is less critical.

Inventive Principle:

Principle #3Local quality

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

The solution enhances light transmittance and reduces sheet resistance in the connecting wiring, thereby improving the overall display quality and functionality of the device.

Implementation Method 1

light transmittance of the connecting wiring may be improved

Methodology Applied

Scientific EffectLight transmittance:

Implementation Method 2

sheet resistance of the connecting wiring may be reduced

Methodology Applied

Scientific EffectElectrical conduction: Conduction (electrical)

Data Source

PatentUS12550570B2Display device

Publication Date: 2026.02.10 SAMSUNG DISPLAY CO LTD

AI summary

A display device includes: a substrate including a main display area, a component area and a non-display area, an auxiliary light-emitting element disposed in the component area, a driver disposed in the non-display area, an auxiliary pixel circuit disposed in the non-display area, and a connecting wiring including a first portion, a second portion disposed on the first portion, and a third portion disposed on the second portion.