OLED Display Adhesive Reliability via Segmented Tape and Offset Light Blocking
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
OLED displays face issues with adhesive tape lifting or separating from the main board due to the transmission of elastic force from the flexible circuit board, leading to unreliable adhesion and potential separation of components.
Innovation Solution
Incorporating a light blocking member laterally offset from the adhesive member on the OLED display's substrate, with a specific distance and length configuration to prevent overlap and maintain stable adhesion, thereby enhancing the reliability of component combination.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a flexible circuit board with elastic force is used to couple the substrate to the main board, then the flexibility and mounting capability are improved, but the adhesive tape is lifted or separated due to transmitted elastic force
Solution Approach 1:
The patent segments the adhesive tape into multiple sections along its length, with different sections having different adhesion characteristics. The first adhesive section has strong adhesion to the substrate, while the second adhesive section has weaker adhesion to the flexible circuit board. This segmentation allows the adhesive tape to differentially manage the elastic force transmission, preventing complete lifting while maintaining flexibility.
Solution Approach 2:
The patent applies local quality by creating regions of different adhesion strength along the adhesive tape. The first adhesive section (near the substrate) has strong adhesion properties, while the second adhesive section (near the flexible circuit board) has weaker adhesion properties. This local differentiation in adhesion quality allows the system to maintain overall adhesion reliability while accommodating the elastic force and flexibility requirements.
2Reliability
If the adhesive tape is made stronger to prevent separation, then the adhesion reliability is improved, but the flexible circuit board cannot be properly mounted due to excessive force transmission
Solution Approach 1:
The adhesive tape is divided into functional segments with different adhesion strengths. The first adhesive section provides strong bonding to the substrate for reliability, while the second adhesive section provides weaker bonding to the flexible circuit board, allowing it to be properly mounted without excessive force transmission. This segmentation resolves the contradiction between strong adhesion and mounting capability.
Solution Approach 2:
The patent changes the adhesion parameter (adhesive strength) along the length of the adhesive tape. By varying the adhesive strength from the first section (stronger) to the second section (weaker), the system achieves both reliable substrate bonding and proper flexible circuit board mounting, resolving the contradiction between adhesion reliability and mounting capability.
Data Source
AI summary
An organic light emitting diode (OLED) display includes: a substrate including a plurality of organic light emitting elements; an adhesive member on at least a portion of an upper surface of the substrate; a flexible circuit board adhered to the upper surface of the adhesive member and having a portion bent to be mounted to a lower surface of the substrate; and a light blocking member at the upper surface of the substrate, wherein the light blocking member is laterally offset from the adhesive member.