Alternating Barrier Structures for OLED Substrate Alignment
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Solution Overview
Problem
The existing organic light emitting display devices face issues with image quality and reliability due to distortion of substrates during the attachment process, which affects the alignment of the color filter and light emitting layer, leading to luminance and contrast deterioration.
Innovation Solution
The implementation of barriers on the substrates, alternately coupled to each other, which increases adhesion and prevents substrate distortion during the attachment process, ensuring proper alignment and maintaining image quality and reliability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If heat and pressure are applied during the attachment process of the conductive member, then the conductive member is properly attached between the substrates, but the substrates become distorted
Solution Approach 1:
The patent introduces barrier structures that segment the substrate surface into distinct regions. These barriers are arranged in alternating patterns and extend from edges toward the center, creating discrete attachment zones that localize the effects of heat and pressure, preventing widespread substrate distortion while maintaining effective conductive member attachment.
Solution Approach 2:
The barrier structures serve as intermediary elements between the substrates and the attachment process. They mediate the attachment by providing structured interfaces that control where heat and pressure are applied, enabling proper conductive member attachment while protecting the overall substrate shape from distortion.
2Ease of manufacture
If the substrates are distorted during attachment, then the attachment process is simplified, but the alignment between the color filter and light emitting layer deteriorates
Solution Approach 1:
By segmenting the substrate surface with alternating barrier structures, the patent creates defined alignment reference zones. These segmented barriers provide physical guides that maintain precise alignment between the color filter and light emitting layer during the attachment process, preventing misalignment even when heat and pressure are applied.
Solution Approach 2:
The barrier structures are pre-formed on the substrates before the attachment process. This preliminary action establishes fixed reference points and alignment guides in advance, ensuring that when the attachment process occurs, the color filter and light emitting layer remain precisely aligned without requiring complex real-time adjustment.
3Manufacturing precision
If barriers are added to prevent substrate distortion, then alignment and image quality are maintained, but the device structure becomes more complex
Solution Approach 1:
Rather than making the entire substrate structure complex, the patent applies barriers only in specific local regions where they are most needed for alignment and distortion control. The barriers are strategically positioned in alternating patterns, providing local quality enhancement without requiring complex modifications throughout the entire device structure.
Solution Approach 2:
The barrier structures are implemented as thin film or shell-like formations on the substrate surface. This approach maintains structural simplicity by using thin, lightweight barrier layers rather than bulky three-dimensional structures, thereby preventing substrate distortion and maintaining alignment precision without significantly increasing overall device complexity.
Data Source
AI summary
An organic light emitting display device is provided that includes a first substrate having a first pad electrode; a second substrate having a touch array and a second pad electrode connected to the touch array; a plurality of first barriers provided on one surface of the first substrate adjacent to the first pad electrode; and a plurality of second barriers provided on the other surface of the second substrate facing one surface of the first substrate, wherein the first barriers are coupled to the second barriers alternately with each other.