Light Field Camera Lens Array Engaging Structure
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Solution Overview
Problem
Conventional head-mounted devices for AR, VR, and MR suffer from Vergence-Accommodation Conflict (VAC), leading to uncomfortable user experiences due to non-translucent displays, which require improved image quality and reduced processing latency.
Innovation Solution
The head-mounted device incorporates a configuration of first and second light field cameras and displays connected via a supporting structure, featuring lens groups with collimators and image sensors, arranged in two-dimensional lens arrays, and engaging structures between lens elements to enhance image quality and reduce VAC, while maintaining real-time image capture and display.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If non-translucent displays are used in head-mounted devices, then device complexity is reduced, but Vergence-Accommodation Conflict occurs causing uncomfortable user experiences
Solution Approach 1:
The patent introduces a translucent display as an intermediary component between the user's eye and the external environment. This translucent display allows simultaneous viewing of virtual content and the real world, mediating the conflict between virtual image focus and real-world accommodation, thereby reducing Vergence-Accommodation Conflict while maintaining manageable device complexity
Solution Approach 2:
The patent segments the display system into multiple functional layers including the translucent display layer, light field camera layer, and supporting structure. This segmentation allows each component to be optimized independently, with the translucent display specifically addressing the VAC issue while other components handle imaging and structural functions
2Device complexity
If conventional camera modules are used for spatial positioning and mapping, then device complexity is reduced, but image quality and processing latency are insufficient for immersive visual experience
Solution Approach 1:
The patent merges the light field camera functionality with the translucent display system, creating an integrated imaging and display architecture. The light field camera captures both spatial positioning data and high-quality images simultaneously, eliminating the need for separate conventional camera modules while achieving superior image quality and reduced processing latency for immersive visual experiences
3Measurement precision
If light field cameras with two-dimensional lens arrays are used, then image quality is improved, but device complexity increases
Solution Approach 1:
The patent implements a nested structure where multiple lens elements are arranged in a two-dimensional lens array within a compact lens group. Each lens element is precisely positioned and engaged with adjacent elements through engaging structures, creating a nested configuration that achieves high image quality while minimizing the overall footprint and complexity of the light field camera system
4Manufacturing precision
If multiple lens elements are arranged in two-dimensional lens array, then manufacturing precision is improved, but device complexity increases
Solution Approach 1:
The patent incorporates preliminary engagement structures between adjacent lens elements that are pre-configured to ensure precise positioning during assembly. These engaging structures are designed in advance to guide the lens elements into their correct two-dimensional array configuration, thereby achieving high manufacturing precision while reducing the actual assembly complexity through self-aligning features
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 provides high image quality, reduces VAC, and ensures real-time image processing with reduced latency, enhancing user experience by aligning image resolution with display resolution and minimizing time lag in image signal synchronization.
Implementation Method 1
Each of the first light field camera and the second light field camera includes, in order from an object side to an image side, a lens group, a collimator and an image sensor
Implementation Method 2
Each of the first light field camera and the second light field camera includes, in order from an object side to an image side, a lens group, a collimator and an image sensor
Data Source
AI summary
A head-mounted device includes a first light field camera, a second light field camera, a first light field display, a second light field display and a supporting structure. Each of the first light field camera and the second light field camera includes, in order from an object side to an image side, a lens group, a collimator and an image sensor. Each of the lens groups includes a plurality of lens units. The lens units are arranged in a two-dimensional lens array, and each of the lens units includes a lens container and a plurality of lens elements. A first engaging structure is disposed between at least two adjacent lens elements of the lens elements.