Optical Laminate Support Layer to Suppress VR Air Bubbles
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Solution Overview
Problem
Optical laminates used in VR goggles are prone to defects such as air bubbles due to uneven surfaces during lamination, which can affect image quality.
Innovation Solution
Incorporating a support layer with an indentation modulus of elasticity of 1 GPa or more and arranging an adhesion layer directly adjacent to the support layer to suppress air bubble formation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional lamination is used without a support layer, then the manufacturing process is simple, but air bubbles and defects occur during lamination
Solution Approach 1:
A support layer is introduced before the lamination process to preliminarily flatten the surface and provide a stable base for subsequent layers. This preliminary structural preparation prevents air bubble formation during lamination without complicating the overall manufacturing process
Solution Approach 2:
The support layer acts as an intermediary between the base substrate and the optical layers. It mediates the lamination process by providing a flat, stable surface that facilitates proper adhesion and prevents defect formation, thereby improving reliability while maintaining manufacturing simplicity
2Manufacturing precision
If the support layer has high indentation modulus (≥1 GPa), then surface flatness and adhesion are improved, but material selection and manufacturing cost increase
Solution Approach 1:
The patent specifies a quantitative parameter threshold (indentation modulus ≥1 GPa) for the support layer material. This parameter change criterion enables systematic material selection and quality control, achieving consistent surface flatness and adhesion properties while providing clear manufacturing guidelines
Solution Approach 2:
The support layer is designed with specific localized properties (high indentation modulus) only where needed for surface stabilization and adhesion. This allows using cost-effective materials with targeted performance characteristics rather than requiring high-performance materials throughout the entire laminate structure
Data Source
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Figure 3
AI summary
The present invention provides an optical laminate in which a defect is suppressed. The optical laminate of the present invention is an optical laminate, including: a polarizing member including an absorption-type polarizer and a protective layer arranged on at least one side thereof; and a first retardation member, wherein the optical laminate further includes a support layer having an indentation modulus of elasticity of 1 GPa or more, and wherein an adhesion layer is arranged directly adjacent to the support layer.