Light Field Display for Presbyopic Drivers
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional vehicle display systems, particularly for elderly drivers, face challenges in providing clear, sharp images due to presbyopia, as they require the driver to wear bifocal or varifocal glasses to accommodate the close proximity of monitors to their eyes, limiting visibility and comfort.
Innovation Solution
A light field display system positioned at a higher distance from the driver's eyes, utilizing a micro lens array and eye-tracking technology to generate a 3D visual effect similar to real-world viewing, allowing images to be seen sharply without glasses by adjusting the virtual image distance and compensating for individual eye defects.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If a conventional display monitor is positioned close to the driver's eyes, then the device complexity and space requirements are reduced, but elderly drivers with presbyopia cannot see the images clearly without wearing bifocal or varifocal glasses
Solution Approach 1:
The patent transitions from a conventional 2D display to a light field display that reconstructs 3D light distributions. By mapping scene areas to respective rays in physical space and creating multiple focal planes at different depths, the system enables clear viewing at close distances without requiring corrective lenses for presbyopic drivers.
Solution Approach 2:
The system dynamically adjusts focal depth and light field parameters to compensate for presbyopia. By varying the focal plane distances and light ray distributions, the display adapts to different viewing conditions and driver eye characteristics, enabling clear images without corrective eyewear.
2Manufacturing precision
If a light field display system is implemented, then image clarity and 3D visual effect are improved, but the device complexity and physical space requirements increase
Solution Approach 1:
The light field display system serves multiple functions: it provides clear 2D images, creates 3D visual effects, and compensates for presbyopia simultaneously. By integrating these functions into a single display architecture using lens arrays and light field processing, the system reduces overall complexity compared to having separate systems for each function.
3Manufacturing precision
If separate light field projectors are provided for each eye at very near proximity, then 3D visual effect is improved, but the device complexity and ease of operation are reduced
Solution Approach 1:
The patent merges the light field projection for both eyes into a single integrated display unit positioned at a reasonable distance from the driver. This unified approach maintains autostereoscopic 3D effects while improving ease of operation, allowing the driver to view the display naturally without wearing special glasses or positioning their eyes at extreme proximity.
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 clear, sharp, and comfortable viewing of vehicle information and navigation systems for drivers of all ages without the need for corrective eyewear, while reducing the physical space required for the display system, enhancing safety and usability.
Implementation Method 1
A light field display, as described herein, maps each area of a scene (as captured by an imaging sensor) to a respective appropriate ray in physical space
Data Source
AI summary
A vision system of a vehicle includes a display configured to be disposed in the vehicle so as to be operable to display images for viewing by an occupant of the vehicle. The display includes a light field display. The system may include at least one camera configured to be disposed at a vehicle so as to have a respective field of view exterior of the vehicle, whereby the display may display images derived from image data captured by the at least one camera. The vision system may include a head-up display system having the light field display disposed at or in the instrumental panel and projecting images onto a combiner on top of the dashboard facing the driver of the vehicle.