Transparent Micro-LED Display Lamination for Curved VR Headsets
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Solution Overview
Problem
Existing LED display technologies face challenges in providing transparent and flexible substrates that can accommodate micro-LEDs, especially for applications requiring curved or irregularly shaped surfaces, and lack efficient protection mechanisms for the micro-LEDs.
Innovation Solution
The use of a transparent flexible substrate laminated with a sparse array of micro-LEDs, encapsulated by an adhesive layer, which allows for integration on both flat and curved substrates, providing protection and maintaining optical properties while allowing light transmission.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a transparent flexible substrate is used for micro-LED displays, then adaptability to curved and irregular surfaces is improved, but protection of micro-LEDs becomes insufficient
Solution Approach 1:
The patent implements a multi-layer protective structure where the transparent flexible substrate serves as the base layer, and additional protective layers are stacked upon it. The micro-LEDs are embedded within this nested structure, with each layer providing specific protection while maintaining overall transparency and flexibility. This nesting approach allows the display to conform to curved surfaces while protecting the sensitive micro-LED components.
Solution Approach 2:
The patent employs composite material construction by combining the transparent flexible substrate with other protective materials in a multi-layer configuration. Each material is selected for its specific properties - the flexible substrate provides adaptability, while the additional layers contribute protection, structural support, and optical clarity. This composite approach resolves the contradiction by integrating materials that collectively provide both flexibility and protection.
2Illumination intensity
If micro-LEDs are arranged in a sparse array on a transparent substrate, then transparency and flexibility are improved, but protection mechanisms become insufficient
Solution Approach 1:
The protective structure is implemented as nested layers surrounding the sparse micro-LED array. The transparent flexible substrate forms the outermost layer that maintains optical properties, while additional protective layers are nested beneath it. This nesting allows the sparse array configuration to be maintained for transparency while providing comprehensive protection through the layered structure.
Solution Approach 2:
The patent incorporates protective layers that are positioned in advance to cushion and protect the micro-LEDs before any potential damage occurs. These pre-positioned protective layers absorb mechanical stress and environmental hazards, allowing the sparse micro-LED array to maintain its transparency and light transmission properties while being adequately protected.
3Ease of manufacture
If transparent flexible substrate is laminated with micro-LEDs, then ease of manufacture for various shapes is improved, but device complexity increases
Solution Approach 1:
The transparent flexible substrate serves multiple functions simultaneously: it provides the structural base for mounting micro-LEDs, enables flexibility and conformability to various shapes, maintains optical transparency, and acts as a protective barrier. This multi-functionality simplifies the overall manufacturing process by eliminating the need for separate components for each function, despite the multi-layer encapsulation structure.
Solution Approach 2:
The patent merges multiple functions into the transparent flexible substrate and its encapsulation structure. The substrate combines structural support, flexibility, transparency, and protection in a single integrated component. The lamination process merges the micro-LED array with the substrate in one manufacturing step, reducing overall device complexity despite the sophisticated multi-layer design.
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 configuration enables transparent and flexible displays that maintain optical properties, allowing for enhanced user experiences in augmented and virtual reality applications, with improved protection and compatibility with various substrate shapes.
Implementation Method 1
transparent flexible substrate laminated with a sparse array of micro-LEDs, encapsulated by an adhesive layer, which allows for integration on both flat and curved substrates, providing protection and maintaining optical properties while allowing light transmission
Data Source
AI summary
A virtual reality (VR) headset, system, and method of fabrication are disclosed. The VR headset includes a frame, a transparent display that includes an array of light-emitting diodes (LEDs), and a darkening layer having a controllable opacity, and a processor controlling the display and darkening layer. A proximity sensor detects a potential collision, and the opacity is changed from opaque to transparent in response to detection of the potential collision. The opacity is changed in response to activation of a virtual user input or predetermined eye movement.