Miniaturized Display Electrode Layout to Prevent Residue Shorts

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Solution Overview

Problem

As display devices become miniaturized, the risk of short circuits due to residues during the manufacturing process increases, necessitating a solution to prevent such occurrences.

Innovation Solution

The display device incorporates a specific layer structure with anode and cathode electrodes, reflective electrodes, light emitting elements, and transparent electrodes, along with organic layers arranged in specific directions to prevent short circuits.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Volume of moving object

If display devices are miniaturized, then the size and performance of display devices are improved, but the risk of short circuits due to residues during manufacturing increases

Engineering Contradiction:

Improvedisplay device sizeVSAvoidshort circuit risk

Core Design Contradiction:

Volume of moving objectVSReliability

Solution Approach 1:

The patent applies preliminary action by forming an organic layer on the light emitting element before forming the transparent electrodes. This organic layer is prepared in advance to prevent short circuits that may occur during subsequent manufacturing processes, addressing the reliability issue before it can manifest.

Inventive Principle:

Principle #10Preliminary action

Solution Approach 2:

The organic layer serves as an intermediary between the light emitting element and the transparent electrodes. It acts as a protective barrier that prevents direct contact between conductive materials, thereby eliminating the short circuit risk while allowing the miniaturized structure to function properly.

Inventive Principle:

Principle #24Intermediary (Mediator)

2Device complexity

If transparent electrodes are formed directly on reflective electrodes and bonding electrodes, then manufacturing steps are reduced, but short circuits due to residues may occur

Engineering Contradiction:

Improvemanufacturing process complexityVSAvoidshort circuit prevention

Core Design Contradiction:

Device complexityVSReliability

Solution Approach 1:

The organic layer is introduced as an intermediary layer between the reflective/bonding electrodes and the transparent electrodes. This additional layer prevents direct contact between conductive materials, eliminating short circuit risks while maintaining a relatively simple manufacturing process.

Inventive Principle:

Principle #24Intermediary (Mediator)

Solution Approach 2:

The organic layer is formed in advance before the transparent electrodes are deposited. This preliminary action ensures that the protective barrier is in place before any residue from transparent electrode formation could cause a short circuit.

Inventive Principle:

Principle #10Preliminary action

Data Source

PatentUS20250255058A1Display device and display system including the same

Publication Date: 2025.08.07 SAMSUNG DISPLAY CO LTD

AI summary

A display device includes a display element layer disposed on a substrate, and the display element layer includes an anode electrode and a cathode electrode, a first reflective electrode disposed on the anode electrode, a second reflective electrode disposed on the cathode electrode, a light emitting element including a first bonding electrode and a second bonding electrode, a first organic layer disposed on the light emitting element and disposed between the anode electrode and the cathode electrode in a plan view, a first transparent electrode directly electrically connecting the first reflective electrode and the first bonding electrode, and a second transparent electrode directly electrically connecting the second reflective electrode and the second bonding electrode.