Floating Electrode Layout for Display Line Cutting Protection
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Solution Overview
Problem
During the cutting process of display devices, the lower lines are prone to damage due to the presence of upper lines, which can lead to electrical issues and inefficiencies in the light emission mechanism.
Innovation Solution
Incorporating a floating electrode structure between the lower and upper lines, where the floating electrode has a specific geometry with longer extensions in one direction than the other, to prevent damage to the lower lines during the cutting process and reduce step differences at corners or ends.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If upper lines are disposed directly over lower lines in the display device, then the electrical connection and signal transmission are simplified, but the lower lines are prone to damage during the cutting process
Solution Approach 1:
A floating electrode is introduced as an intermediary element between the upper line and lower line. This floating electrode serves as a protective mediator that prevents direct contact between the cutting tool and the lower line during the cutting process, thereby protecting the lower line from damage while maintaining the simplified electrical connection structure
Solution Approach 2:
The floating electrode is positioned in advance between the upper and lower lines to provide protective cushioning. This pre-positioned protective layer absorbs or deflects the mechanical stress from the cutting process before it can reach the lower line, preventing damage beforehand
2Ease of manufacture
If the floating electrode has equal extensions in both directions, then the manufacturing process is simplified, but the step difference at corners or ends remains significant
Solution Approach 1:
The floating electrode is designed with asymmetric extensions where the first extension in the first direction is longer than the second extension in the second direction. This asymmetric configuration allows the floating electrode to better conform to the cutting path and reduce step differences at corners or ends, improving manufacturing precision while maintaining reasonable ease of manufacture
Data Source
AI summary
A display device includes a substrate, a first lower line that is disposed on the substrate, extends in a first direction and applies a first voltage to a light emitting element, a first upper line that is disposed on the first lower line, extends in a second direction perpendicular to the first direction, applies a second voltage having different from the first voltage, and crosses the first lower line, and a first floating electrode disposed between the first lower line and the first upper line, including a crossing portion overlapping the first lower line and the first upper line, a first portion extending from the crossing portion in the second direction, and a second portion extending from the crossing portion in the first direction. A length of the first portion in the second direction is longer than a length of the second portion in the first direction.