See-through Display Stray Light Management
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Solution Overview
Problem
Current see-through computer display systems face challenges in optimizing user experience due to complications in presenting content effectively, particularly in managing stray light, which affects the clarity and quality of both digital imagery and the environmental view.
Innovation Solution
The implementation of advanced optical management systems, including upper and lower optical modules with dark light traps and combiner elements, such as holographic or notch mirrors, to efficiently direct and suppress stray light, ensuring high contrast and clear visibility of both digital content and the environment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If traditional display optics are used in see-through displays, then the structure is simpler, but stray light reduces image contrast and environmental visibility
Solution Approach 1:
The optical system is divided into separate upper and lower optical modules, each with dedicated light traps for managing stray light from different directions. This segmentation allows targeted stray light control without requiring complete system redesign.
Solution Approach 2:
Light traps are introduced as intermediary elements between the display optics and the user's eye. These light traps intercept and absorb stray light before it reaches the user, acting as mediators that resolve the conflict between simple optics and image quality.
2Reliability
If light traps are added to suppress stray light, then image contrast improves, but the device becomes more complex
Solution Approach 1:
Light traps are strategically placed in specific locations where stray light problems occur most severely, rather than uniformly throughout the system. This local quality approach targets critical areas for stray light control while minimizing overall system complexity.
Solution Approach 2:
The light traps are integrated within the existing upper and lower optical modules, nesting the stray light control functionality within the broader optical system architecture. This nesting allows light trap functionality to be incorporated without requiring completely separate system structures.
3Illumination intensity
If complex optical management systems are implemented, then stray light control improves, but manufacturing difficulty increases
Solution Approach 1:
The optical system is divided into separate upper and lower modules that can be manufactured and tested independently before final assembly. This segmentation simplifies the manufacturing process by breaking down complex assembly steps into manageable sub-assembly operations.
Solution Approach 2:
The light trap design uses universal geometric shapes and materials that can be manufactured using standard processes. The same light trap geometry can be replicated across multiple units, reducing tooling complexity and manufacturing variability.
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 user experience by providing sharp, high-contrast digital imagery while maintaining a clear, unobstructed view of the environment, improving the overall performance and immersion of see-through displays.
Implementation Method 1
combiner elements, such as holographic or notch mirrors
Implementation Method 2
combiner elements, such as holographic or notch mirrors
Implementation Method 3
upper and lower optical modules with dark light traps
Data Source
AI summary
Aspects of the present invention relate to methods and systems for the see-through computer display systems with integrated IR eye imaging technologies.