Display Device Analysis Element Ground Wire Charge Dissipation
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Solution Overview
Problem
The accumulation of charges during secondary ion mass spectrometry (SIMS) inspections of display devices with small analysis layers, particularly in mobile devices, hinders effective deterioration assessment due to the small size of the analysis element, leading to difficulties in conducting appropriate inspections.
Innovation Solution
A display device configuration with a display element in the display region and an analysis element in the frame region, featuring a sealing layer, a first metal film, an analysis layer, a second metal film covering the analysis layer's edge, and a ground wire electrically connected to the first metal film, which dissipates accumulated charges during SIMS analysis.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If the display element is downsized for mobile devices, then the device becomes more compact and portable, but charges accumulate quickly in the analysis layer making deterioration inspection difficult
Solution Approach 1:
A ground wire is introduced as an intermediary element to provide a charge dissipation path. The ground wire is electrically connected to the analysis layer through conductive layers, serving as a mediator that prevents charge accumulation during SIMS inspection without affecting the display element's functionality or the inspection process
2Measurement precision
If SIMS inspection is applied to small analysis layers, then deterioration can be detected, but charges accumulate rapidly preventing appropriate inspection
Solution Approach 1:
The ground wire acts as a charge dissipation intermediary that prevents charge accumulation during the inspection process. This allows SIMS inspection to proceed effectively on small analysis layers without the time-consuming issue of charge buildup, maintaining both detection precision and inspection efficiency
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 enables effective and efficient deterioration inspection of display devices, even when downsized, by preventing charge accumulation and maintaining accurate signal profiles during SIMS analysis.
Implementation Method 1
a ground wire electrically connected through the first metal film to the second metal film
Data Source
AI summary
A display device includes: a display element provided to a display region; an analysis element provided to a frame region disposed around the display region; and a sealing layer sealing the display element and the analysis element. The display element includes: a TFT layer including a resin film; and a light-emitting element layer including a first electrode, a functional layer, and a second electrode. The analysis element includes: a first metal film formed on the resin film; an analysis layer formed on the first metal film; a second metal film formed to cover at least a portion of an edge of the analysis layer, and electrically connected to the first metal film; and a ground wire electrically connected through the first metal film to the second metal film.