Display Device Buffer Portion for Laminating Pressure Management
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Solution Overview
Problem
The existing display devices face issues with damage to the circuit layer during the laminating process for attaching a polarization layer, leading to reduced quality, reliability, and lifespan due to high pressure causing broken or short-circuited lines.
Innovation Solution
A display device design that includes a buffer portion with a compensation pattern layer in the bonding area, which supports the roller during the laminating process, preventing excessive pressure and damage to the circuit layer, and a polarization layer that overlaps the buffer portion to enhance the structural integrity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If a polarization layer is attached onto the sealing layer through a laminating process using a roller, then reflection of external light is reduced, but the pressure of the roller may increase in areas where organic insulating materials have been removed, causing damage to the circuit layer
Solution Approach 1:
A buffer layer is introduced as an intermediary component between the sealing layer and the circuit layer. This buffer layer absorbs the excessive pressure from the roller during the laminating process, preventing direct transmission of harmful forces to the circuit layer while still allowing the polarization layer to be effectively attached to reduce external light reflection.
Solution Approach 2:
The buffer layer is positioned in advance in the bonding area where organic insulating materials have been removed. It provides pre-established cushioning protection against the roller pressure before the laminating process occurs, preventing damage to the circuit layer from high pressure during attachment of the polarization layer.
2Ease of manufacture
If the roller pressure increases due to step difference from removed organic insulating materials, then the polarization layer can be attached, but the conductive layers or inorganic insulating materials may be damaged causing broken or short-circuited lines
Solution Approach 1:
The buffer layer serves as a protective intermediary that allows the laminating process to proceed smoothly while filtering out excessive pressure. It enables easy attachment of the polarization layer without compromising the precision and integrity of the circuit layer lines underneath.
Solution Approach 2:
The buffer layer is selectively positioned only in the bonding area where organic insulating materials have been removed, rather than uniformly across the entire device. This localized approach provides targeted protection to vulnerable areas while maintaining manufacturing efficiency and circuit layer integrity elsewhere.
3Device complexity
If the polarization layer is attached without a buffer layer, then the manufacturing process is simpler, but the quality, reliability and lifespan of the display device are reduced due to circuit layer damage
Solution Approach 1:
The buffer layer is a simple intermediary component that adds minimal structural complexity to the laminating process. Despite this small addition, it dramatically improves reliability and lifespan by preventing circuit layer damage, making it a highly effective low-complexity solution to a critical reliability problem.
Data Source
AI summary
A display device includes a substrate, a circuit layer, a light emitting element layer, a sealing layer, and a polarization layer. A main area of the substrate includes a display area including emission areas and a non-display area disposed around the display area, the non-display area includes a dam area spaced apart from the display area, the dam area including at least one dam portion surrounding the display area. The non-display area also including a bonding area that surrounds the dam area, the circuit layer includes a buffer portion disposed in a part of the bonding area adjacent to the sub-area, the buffer portion being spaced apart from each of the sub-area and the dam area, and the polarization layer extends to the non-display area and overlaps the buffer portion.