Pixel Electrode Shielding Layout for LED Display Alignment
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Solution Overview
Problem
Existing display devices face challenges in preventing light-emitting elements from aligning in non-emission areas and minimizing damage to electrodes during the manufacturing process.
Innovation Solution
The proposed display device incorporates a shielding electrode in the non-emission area to reduce the likelihood of light-emitting elements aligning incorrectly and uses a conductive layer to cover exposed electrodes, thereby preventing damage and ensuring efficient alignment and operation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If light-emitting elements are placed in the non-emission area for alignment, then alignment precision is improved, but light-emitting elements are lost or damaged
Solution Approach 1:
The patent divides the electrode structure into multiple segments: electrodes in the emission area, connection electrodes above light-emitting elements, and a shielding electrode in the non-emission area. This segmentation allows the shielding electrode to protect the connection portion without interfering with light-emitting element placement in the emission area, thus maintaining alignment precision while preventing element loss.
Solution Approach 2:
The shielding electrode acts as an intermediary element between the electrodes and the connection portion. It covers the connection portion in the non-emission area, preventing light-emitting elements from being misplaced there while still allowing proper alignment in the emission area. The insulating pattern serves as another intermediary between the shielding electrode and connection portion.
2Ease of manufacture
If electrodes are exposed in the manufacturing process, then ease of manufacture is improved, but electrode damage occurs
Solution Approach 1:
The shielding electrode is formed in advance to cover the connection portion before subsequent manufacturing steps. The insulating pattern is also deposited beforehand to provide protection. This preliminary action ensures electrodes are protected during later processing while still allowing necessary accessibility during manufacturing.
Solution Approach 2:
The shielding electrode and insulating pattern serve as protective cushioning layers deposited beforehand to prevent damage to exposed electrodes. This prior cushioning protects the electrodes from mechanical damage, contamination, or short circuits that could occur during subsequent manufacturing processes.
3Manufacturing precision
If shielding structure is added to prevent misalignment, then manufacturing precision is improved, but device complexity increases
Solution Approach 1:
The shielding electrode serves multiple functions: it prevents light-emitting elements from being misplaced in the non-emission area, provides electrical shielding, and structurally supports the connection portion. The insulating pattern similarly provides both electrical insulation and structural protection. This multi-functionality reduces the need for additional separate components, thereby limiting the increase in device complexity.
Data Source
AI summary
A display device includes electrodes in an emission area of a pixel, and spaced apart from each other, light-emitting elements respectively between the electrodes, connection electrodes above the light-emitting elements, and including a first electrode portion, a second electrode portion, and a connection portion between the first electrode portion and the second electrode portion, and a shielding electrode in a non-emission area of the pixel, and overlapping the connection portion.