Lens Element Attached to Display Using Optically Clear Adhesive
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Solution Overview
Problem
In head-mounted devices, aligning lenses with displays can be challenging, leading to poor alignment and potential dust or contaminant obstruction, which affects the clarity of visual content.
Innovation Solution
Attaching a lens element directly to the display using optically clear adhesive or a gel lens element, eliminating the air gap and allowing for easier alignment and improved mechanical stress distribution, while accommodating input-output components.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If a lens is attached to a display with an air gap, then dust and contaminants can block portions of the display, but aligning the lens with the display becomes more difficult and mechanical stress distribution is poor
Solution Approach 1:
The patent merges the lens element directly to the display surface using optically clear adhesive, eliminating the air gap between them. This integration prevents dust accumulation while maintaining precise alignment through the adhesive bonding process, resolving the contradiction between preventing contamination and achieving alignment precision.
Solution Approach 2:
The optically clear adhesive serves as an intermediary substance between the lens and display. It provides both mechanical bonding for precise alignment and creates a sealed interface that prevents dust ingress, simultaneously addressing both the alignment precision and contamination prevention requirements.
2Adaptability or versatility
If separate lens modules are used for each eye, then alignment can be adjusted independently, but device complexity and manufacturing costs increase
Solution Approach 1:
The patent combines both lens elements into a single integrated lens module that attaches to the display assembly. This unified structure reduces device complexity and manufacturing costs while maintaining the ability to adjust alignment through the overall module positioning, rather than requiring completely separate adjustable mechanisms for each lens.
3Reliability
If lenses are attached to displays, then visual content can be presented, but mechanical stress on the display increases
Solution Approach 1:
The patent applies optically clear adhesive in specific localized areas between the lens element and display, rather than uniform attachment across the entire surface. This localized bonding approach distributes mechanical stress more effectively and prevents excessive stress concentration that could damage the display, while still maintaining reliable visual content presentation.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This solution enhances the alignment of lenses with displays, prevents dust contamination, and reduces manufacturing complexity and costs by ensuring precise alignment and improved mechanical support.
Implementation Method 1
each lens may include a lens element that has a surface that faces the display and is coupled to the display. The lens element may be attached to the display with a layer of optically clear adhesive or the lens element may be a gel lens element that directly contacts the display
Data Source
AI summary
A head-mounted device may have a display that displays content for a user. Head-mounted support structures in the device support the display on the head of the user. The head-mounted device may have a left lens that directs images from the left portion of the display to a left eye box and a right lens that directs images from the right portion of the display to a right eye box. Each lens may include a lens element that is coupled to the display. The lens element may be attached to the display with a layer of optically clear adhesive or the lens element may be formed from gel that directly contacts the display. The lens element attached to the display may have protrusions or recesses to accommodate input-output components. A single lens element may be attached to both the left and right portions of the display.