Adaptive Optical Assembly With Eye Tracking for Compact AR/VR Displays
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Solution Overview
Problem
Current augmented, virtual, and mixed reality devices require large and bulky optical assemblies, limiting their portability and user comfort.
Innovation Solution
An optical system with a light source assembly, optical path adjustment assembly, control element, and sensing assembly that includes eye tracking and depth sensing capabilities, allowing for miniaturization and adjustment of focal length through movable optical elements.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If traditional optical projection technology is used for AR/VR/MR devices, then display functionality is achieved, but device size becomes large and bulky
Solution Approach 1:
The patent implements movable optical elements (first and second optical elements) that can change position relative to each other along the optical axis, enabling dynamic adjustment of focal length. This dynamic mechanism allows the optical system to adapt to different viewing distances and focal requirements, achieving compact design while maintaining versatile display functionality for AR/VR/MR applications
Solution Approach 2:
The optical system is divided into distinct functional modules: a light source assembly, a movable optical element assembly, and a sensing assembly. This segmentation allows each component to be optimized independently and compactly arranged, reducing overall device volume while maintaining display performance
2Volume of moving object
If optical assembly size is reduced for portability, then user comfort improves, but optical functionality may be compromised
Solution Approach 1:
The patent employs movable optical elements with adjustable positions to dynamically control focal length and optical path. This dynamic capability allows a compact optical assembly to achieve multiple optical states equivalent to larger fixed systems, maintaining optical performance reliability while reducing assembly size for improved portability
Solution Approach 2:
The system changes optical parameters (focal length, optical path length) by moving optical elements rather than changing the physical size of the entire optical assembly. This parameter-based control enables compact design while preserving optical functionality through precise control of light propagation characteristics
3Volume of moving object
If focal length is made adjustable for enhanced display capabilities, then system complexity increases, but device miniaturization is achieved
Solution Approach 1:
The patent implements a relatively simple movable optical element mechanism that achieves focal length adjustment through position changes along the optical axis. This dynamic approach provides variable focus capability without requiring complex multi-element lens systems, enabling device miniaturization while maintaining adjustable display capabilities
Solution Approach 2:
The movable optical elements serve multiple functions: they adjust focal length, control optical path length, and enable focus tuning. This multi-functionality reduces the need for separate components, simplifying the overall optical system while achieving adjustable display capabilities for enhanced functionality
Data Source
AI summary
An optical system used for displaying a target image is provided. The optical system includes a light source assembly used for generating an initial image, an optical path adjustment assembly used for transferring the initial image to the target image, a control element used for providing a first control signal to the light source assembly, and a sensing assembly used for providing a sensing signal to the control element. The control element provides the first control signal based on the sensing signal.