Multiscopic See-Through Display for Wide FOV and Eye Box
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Solution Overview
Problem
Conventional heads-up displays (HUDs) have a limited field of view and eye box, leading to a less immersive user experience and user discomfort due to restricted movement.
Innovation Solution
A system and method utilizing a multiscopic see-through display with a controllable parallax barrier and tracking means to provide a large field of view and eye box, allowing for immersive virtual content presentation by directing light from specific pixel sets to each eye based on their relative location, while controlling the parallax barrier to minimize ghosting and dimming effects.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If a conventional light field display unit is used in a HUD, then the display can be integrated into the vehicle windshield, but the field of view is limited to a small portion of the windshield
Solution Approach 1:
The display system is segmented into multiple independent light field display units arranged across the windshield. Each unit can be independently controlled to display virtual content to specific users at specific locations, enabling a large overall field of view while keeping individual display units manageable in size.
Solution Approach 2:
The system transitions from a single centralized display to a distributed array of display units across the windshield surface. This spatial distribution in two dimensions enables a much larger effective field of view without requiring a single oversized display unit.
2Ease of operation
If a conventional HUD displays virtual content on a small portion of the windshield, then the display unit size is manageable, but the eye box is limited restricting user movement freedom
Solution Approach 1:
The eye box is segmented into multiple independent viewing zones corresponding to different light field display units. Each zone can be independently activated for different users, allowing multiple users to view content simultaneously from different positions without restricting movement freedom.
Solution Approach 2:
The display system serves multiple users simultaneously from different positions. Each light field display unit can be configured to serve different users based on their locations, making the system universally applicable to multiple users with different viewing positions and movement freedoms.
3Adaptability or versatility
If a single light field display unit is used, then the system is simple, but it cannot simultaneously present virtual content to multiple users at different locations
Solution Approach 1:
The system divides the windshield into multiple zones with independent light field display units. Each unit can be independently controlled to present content to specific users at specific locations, enabling simultaneous multi-user support while maintaining manageable complexity through modular architecture.
Solution Approach 2:
The system dynamically activates different light field display units based on real-time user location detection. This dynamic configuration allows the system to adapt to different user positions and simultaneously serve multiple users without requiring all display units to be permanently active, managing complexity through on-demand activation.
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 highly immersive user experience with a large field of view and eye box, supporting real-time simultaneous presentation of virtual images without user discomfort, by accurately tracking user eye positions and controlling the parallax barrier to enhance autostereoscopic effects.
Implementation Method 1
a transparent display and a controllable parallax barrier that optically combine a real-world light field passing through the transparent display with a synthetic light field produced by the transparent display
Data Source
AI summary
A first virtual image and a second virtual image represent virtual object(s) from a perspective of a first eye and a second eye of user(s). A union of first image segment(s) in the first virtual image and second image segment(s) in the second virtual image that represent the virtual object(s) is determined. A given portion of a transparent display whereat said union is to be presented is determined. A light field image is displayed via the transparent display, whilst controlling a controllable parallax barrier arranged on an optical path of the transparent display. The step of controlling the controllable parallax barrier comprises activating a given portion of the controllable parallax barrier that corresponds to the given portion of the transparent display.