3D Electronic Display with Multibeam Grating Backlight
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Solution Overview
Problem
Passive displays in vehicle monitoring systems, which do not emit light, are limited in practical applications due to their inability to emit light, often requiring external light sources for functionality, which can be cumbersome.
Innovation Solution
A vehicle monitoring system that employs a 3D scanner to collect spatial information about the surrounding region and a 3D electronic display with a multibeam grating-based backlight to visually highlight objects close to the vehicle, enhancing perception and collision avoidance without the need for external light sources.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If passive displays are used in vehicle monitoring systems, then power consumption is reduced, but the display cannot emit light and requires external light sources
Solution Approach 1:
The patent combines a passive display with a light guide and microlens array to create an integrated light-emitting display system. The light guide collects and distributes light from a compact source, while the microlens array focuses and directs this light through the passive display, enabling the display to emit light without requiring external light sources.
Solution Approach 2:
The patent introduces a light guide as an intermediary component between the light source and the passive display. The light guide acts as a mediator that collects, transports, and distributes light to the display, enabling the passive display to function as a light-emitting device without direct coupling to external light sources.
2Illumination intensity
If external light sources are coupled to passive displays, then the displays can emit light, but the system becomes more complex and cumbersome
Solution Approach 1:
The patent implements a nested structure where the microlens array is positioned within or in close proximity to the light guide, which itself is coupled to the passive display. This nested arrangement integrates multiple functional components into a compact unit, reducing overall system complexity while maintaining light emission capability.
Solution Approach 2:
The patent merges the light guide and microlens array into an integrated light delivery system that is directly coupled to the passive display. This combination eliminates the need for separate external light sources and their associated mounting and control mechanisms, thereby reducing system complexity.
3Loss of information
If a multibeam grating-based backlight is used, then 3D imaging capability is achieved, but manufacturing complexity increases
Solution Approach 1:
The patent replaces complex mechanical 3D imaging systems with an optical-based multibeam grating approach. The diffraction grating creates multiple light beams that encode spatial information optically, eliminating the need for complex mechanical scanning or multiple sensors, thereby reducing manufacturing complexity while maintaining 3D imaging capability.
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
The system provides enhanced user perception of objects close to the vehicle, facilitating collision avoidance through the use of 3D imaging and autostereoscopic display technology, eliminating the need for external light sources and improving the functionality of passive displays.
Implementation Method 1
guiding light in a plate light guide as a light beam
Implementation Method 2
an array of multibeam diffraction gratings on the plate light guide. The array of multibeam diffraction gratings is configured to diffract the guided light beam to produce a plurality of light beams having different propagation directions
Data Source
AI summary
Vehicle monitoring employs three-dimensional (3D) information in a region adjacent to a vehicle to visually highlight objects that are closer to the vehicle than a threshold distance. A vehicle monitoring system includes a 3D scanner to scan the region adjacent to the vehicle and provide a 3D model including a spatial configuration of objects located within the scanned region. The vehicle monitoring system further includes a 3D electronic display to display a portion of the scanned region using the 3D model and to visually highlight an object within the displayed portion that is located less than the threshold distance from the vehicle.