Display Static Electricity Test Wiring for Open-Defect Detection

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Solution Overview

Problem

Existing display devices face issues with reliability due to static electricity, which can lead to image quality defects and open defects in static electricity prevention layers, making it difficult to detect and prevent such defects effectively.

Innovation Solution

Incorporation of a static electricity test wire system comprising multiple first test wires and a second test wire, connected to a static electricity prevention layer, which forms a current path to detect open defects in the layer, enhancing the reliability of the display device.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If a static electricity prevention layer is added to the display device, then reliability against static electricity damage is improved, but difficulty in detecting open defects in the layer increases

Engineering Contradiction:
ImprovereliabilityVSAvoiddifficulty in detecting open defects
Core Design Contradiction:
ReliabilityVSDifficulty of detecting and measuring

Solution Approach 1:

The patent applies preliminary action by pre-configuring test wires (first test wires and second test wire) that are embedded within the static electricity prevention layer structure before final device assembly. These test wires create predetermined current paths that allow defect detection to be performed early in the manufacturing process, enabling open defects to be identified before the device is completed and shipped.

Inventive Principle:
Principle #10Preliminary action

Solution Approach 2:

The patent uses test wires as intermediary elements that facilitate the detection of open defects in the static electricity prevention layer. The first test wires are connected to the static electricity prevention layer, and the second test wire connects to the first test wires, creating a chain of intermediaries that transmit electrical signals through the prevention layer, allowing indirect detection of defects without directly probing the prevention layer itself.

Inventive Principle:
Principle #24Intermediary (Mediator)

2Measurement precision

If multiple test wires are incorporated into the display device, then detection capability of open defects is improved, but device complexity increases

Engineering Contradiction:
Improvedetection capabilityVSAvoiddevice complexity
Core Design Contradiction:
Measurement precisionVSDevice complexity

Solution Approach 1:

The patent applies segmentation by dividing the test wire structure into multiple functional segments: first test wires that directly contact the static electricity prevention layer, and a second test wire that connects to the first test wires. This segmentation allows each component to have a specific function while collectively providing comprehensive defect detection capability across the display device.

Inventive Principle:
Principle #1Segmentation

Solution Approach 2:

The test wire structure serves multiple functions: it provides electrical connection for static electricity prevention, creates current paths for defect detection, and enables early testing during manufacturing. By designing the test wires to fulfill multiple roles simultaneously, the patent reduces the need for separate dedicated test structures, thereby limiting the increase in device complexity.

Inventive Principle:
Principle #6Universality (Multi-functionality)

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 static electricity test wire system allows for easy detection of open defects in the static electricity prevention layer, improving the reliability and image quality of the display device by ensuring a stable current path and preventing static electricity-related issues.

Implementation Method 1

the static electricity test wire may include a plurality of first test wires spaced apart from each other and connected to the static electricity prevention layer, respectively, and a second test wire electrically connected to the plurality of first test wires

Methodology Applied
Scientific EffectElectrical conduction: Conduction (electrical)

Data Source

PatentUS20250374781A1Display device and electronic device including the same
Publication Date: 2025.12.04 SAMSUNG DISPLAY CO LTD
  • US20250374781A1 patent drawing
  • US20250374781A1 patent drawing
  • US20250374781A1 patent drawing

AI summary

A display device may include a substrate including a display area and a peripheral area disposed outside a display area, a light-emitting element disposed on the display area of the substrate, a static electricity prevention layer configured to cover a side surface of the substrate, and a static electricity test wire disposed on the peripheral area, where the static electricity test wire may include a plurality of first test wires spaced apart from each other and connected to the static electricity prevention layer, respectively, and a second test wire electrically connected to the plurality of first test wires.