Head-worn Computing Optical Module with TIR Wedge and DLP Nesting
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Solution Overview
Problem
Current wearable computing systems face challenges in effectively presenting spatially relevant virtual content to users, particularly in providing a seamless overlay of digital information with real-world environments while maintaining user comfort and operational efficiency.
Innovation Solution
The development of head-worn computing systems that incorporate advanced optical modules, including DLP and TIR wedge configurations, to deliver high-resolution digital content overlaid on the user's field of view, utilizing polarized light and dark state management to enhance contrast and reduce stray light, along with integrated sensors and control technologies for context-aware operation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If advanced optical modules with DLP and TIR wedge configurations are used to deliver high-resolution digital content, then image quality and contrast are improved, but device weight and complexity increase
Solution Approach 1:
The patent integrates multiple optical components (DLP module, TIR wedge, polarizing beam splitter, waveplates) into a nested configuration where smaller optical elements are positioned within or alongside larger structural components. The TIR wedge is integrated with the combiner element, and the DLP module is housed within the optical module structure, achieving compact nesting that reduces overall device weight while maintaining high contrast performance
Solution Approach 2:
The patent combines multiple optical functions into integrated components: the TIR wedge serves both as a total internal reflection element and as part of the combiner structure; the polarizing beam splitter is integrated with waveplate elements; and the DLP module is combined with optical guiding elements. This merging of functions reduces the number of separate components, thereby reducing overall device weight and complexity while maintaining superior image contrast
2Illumination intensity
If multiple optical components are integrated to enhance contrast and reduce stray light, then image quality is improved, but device complexity increases
Solution Approach 1:
The patent merges multiple optical functions into integrated components: the TIR wedge combines total internal reflection with combiner functionality; the polarizing beam splitter is integrated with half-wave and quarter-wave plate elements; and the DLP module is combined with optical guiding elements. This merging reduces the number of discrete components and alignment requirements, thereby reducing system complexity while achieving superior stray light reduction and contrast enhancement
Solution Approach 2:
The patent introduces intermediary optical elements such as the polarizing beam splitter and waveplates that mediate between the DLP module and the final image output. These intermediaries manage polarization states and light paths systematically, providing a structured approach to controlling stray light and enhancing contrast without requiring complex mechanical adjustment mechanisms
3Adaptability or versatility
If context-aware sensors and control technologies are integrated, then user experience is improved, but power consumption and device complexity increase
Solution Approach 1:
The patent integrates sensors that serve multiple functions: environmental light sensors not only detect ambient lighting conditions for display adjustment but also contribute to overall system context awareness; motion sensors detect both user presence and gesture inputs. This multi-functionality allows the system to achieve high adaptability and context awareness while minimizing the number of dedicated sensors, thereby reducing power consumption
Solution Approach 2:
The system employs automatic adjustment mechanisms where sensors continuously monitor environmental conditions and the control system autonomously adjusts display parameters such as brightness and contrast without user intervention. This self-service operation eliminates the need for manual controls and reduces overall power consumption by optimizing display performance in real-time based on sensed conditions
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
Enables a lightweight, compact, and contextually aware head-worn computing system that provides high-resolution, immersive augmented reality experiences with improved contrast and reduced eye strain, allowing users to interact with both digital and physical environments effectively.
Implementation Method 1
TIR wedge configurations
Implementation Method 2
utilizing polarized light and dark state management to enhance contrast and reduce stray light
Data Source
AI summary
Aspects of the present invention relate presentation of digital content, in a see-through display, representing a known location in an environment proximate to a head worn computer. Embodiments may involve a first wearable head device configured to be worn by a first person. The first wearable head device may comprise a see-through display. One or more processors may be configured for determining a first geo-spatial location of the first wearable head device and receiving a second geo-spatial location of a second wearable head device configured to be worn by a second person. The see-through display may be configured for presenting a virtual content on the see-through display at a location associated with the second geo-spatial location. The virtual content may be aligned with a vector from the first geo-spatial location to the second geo-spatial location.