Head-worn Display Content Position Calibration via Optical Modules
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Solution Overview
Problem
Current head-worn computing systems face challenges in accurately calibrating the position of digital content displayed in see-through head-worn displays, leading to suboptimal user experience and functionality.
Innovation Solution
The implementation of advanced optical modules and light management systems within head-worn computing systems, including polarized light sources, digital micromirror devices, and light traps, to efficiently direct and trap light, ensuring clear and accurate digital content overlay on the user's field of view while minimizing stray light and enhancing contrast.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If advanced optical modules and light management systems are implemented, then digital content overlay clarity and contrast are improved, but device complexity increases
Solution Approach 1:
The optical system is divided into distinct functional modules: polarized light source module, digital micromirror device module, light trap module, and combiner module. Each module performs a specific function in the light management process, allowing for optimized design and calibration of individual components while maintaining overall system precision for content positioning.
2Illumination intensity
If polarized light sources and digital micromirror devices are used to enhance contrast and reduce stray light, then content overlay quality is improved, but manufacturing complexity increases
Solution Approach 1:
A combiner element is introduced as an intermediary component that merges the digitally generated light pattern from the DMD with the ambient see-through view. The combiner facilitates the integration of polarized light management and light trapping mechanisms while maintaining a compact form factor suitable for head-worn applications, thereby improving contrast without proportionally increasing manufacturing complexity.
3Reliability
If light traps and optical management systems are implemented to minimize stray light, then image quality is improved, but device size increases
Solution Approach 1:
The light trap structure is designed to be nested within the existing optical path, utilizing the space between other optical components such as the combiner and DMD. This nested configuration allows the light trap to effectively capture and redirect stray light away from the user's view without significantly increasing the overall device volume, thereby maintaining image quality while minimizing size increase.
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 enables high-resolution, high-contrast digital content overlay with improved user immersion and reduced stray light, enhancing the overall user experience and functionality of head-worn computing systems.
Implementation Method 1
polarized light sources
Implementation Method 2
digital micromirror devices
Implementation Method 3
light traps
Data Source
AI summary
Aspects of the present invention relate to methods and systems for calibrating the position of content in a see-through head-worn display.