Remote Laser Light Engine for Head Mounted Display Weight Reduction
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Solution Overview
Problem
Conventional head-mounted display systems are bulky, heavy, and power-intensive due to integrated display and laser components, posing challenges in terms of size, weight, heat management, and safety, while also being aesthetically unappealing and costly to develop.
Innovation Solution
A head-mounted display system with a remote laser light engine decoupled from the display apparatus via an optical cable, utilizing wedge optics for image creation and delivery, allowing for a compact, lightweight design with reduced power needs and safety concerns.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If display and laser components are integrated in the head-mounted display apparatus, then image display function is achieved, but device size and weight increase
Solution Approach 1:
The system is divided into two separate units: a remote laser light engine and a head-mounted display apparatus. The laser light engine is physically separated from the display apparatus and transmitted via optical cable, eliminating the need for heavy laser components within the head-mounted device while maintaining the complete image display function.
Solution Approach 2:
The laser light engine is extracted from the head-mounted display apparatus and positioned remotely. This extraction removes the bulky and heavy laser components from the wearable device, significantly reducing weight while the optical cable transmits the generated light to the display unit.
2Reliability
If display and laser components are integrated in the head-mounted display apparatus, then image display function is achieved, but device volume increases
Solution Approach 1:
The system architecture is segmented into a remote laser light engine and a compact head-mounted display apparatus. This segmentation allows the laser components to be housed in a separate, larger enclosure away from the wearable device, significantly reducing the volume of the head-mounted apparatus while preserving complete image display functionality.
Solution Approach 2:
The laser light engine is extracted from the head-mounted display apparatus and positioned remotely. This extraction removes the bulky laser components from the wearable device, significantly reducing the volume of the head-mounted device while the optical cable transmits the generated light to the display unit.
3Reliability
If integrated laser components are used in head-mounted display apparatus, then laser light generation is achieved, but heat management becomes difficult
Solution Approach 1:
The system is divided into a remote laser light engine and a head-mounted display apparatus. The laser light engine, which generates heat, is physically separated from the head-mounted device. This segmentation allows independent heat management for the laser engine through external cooling systems while keeping the head-mounted apparatus thermally comfortable for the user.
Solution Approach 2:
The laser light engine is extracted from the head-mounted display apparatus and positioned remotely. This extraction removes the heat-generating laser components from the wearable device, eliminating the heat management problems associated with integrated laser systems while the optical cable transmits the generated light to the display unit.
4Reliability
If integrated laser components are used in head-mounted display apparatus, then laser light generation is achieved, but power consumption increases
Solution Approach 1:
The system is divided into a remote laser light engine and a head-mounted display apparatus. The laser light engine can be powered by an external power source or battery separate from the head-mounted device, allowing optimized power management for the high-power laser components away from the wearable unit, while the head-mounted apparatus consumes only minimal power for the imaging device and display elements.
Solution Approach 2:
The laser light engine is extracted from the head-mounted display apparatus and positioned remotely. This extraction allows the high-power laser components to be powered by external sources or separate batteries, significantly reducing the power consumption requirements of the head-mounted wearable device while maintaining complete laser light generation capability.
5Reliability
If integrated laser components are used in head-mounted display apparatus, then laser light generation is achieved, but safety concerns increase
Solution Approach 1:
The system is divided into a remote laser light engine and a head-mounted display apparatus. The high-power laser components are segregated in a separate, remotely located engine, isolating potential safety hazards away from the user. The head-mounted apparatus receives only modulated light through optical cables, eliminating direct exposure to high-power laser beams while maintaining complete image display functionality.
Solution Approach 2:
The laser light engine is extracted from the head-mounted display apparatus and positioned remotely. This extraction isolates the high-power laser components away from the user, significantly reducing safety concerns associated with laser leakage and direct exposure. The head-mounted apparatus handles only safely-modulated light transmitted through optical cables.
6Reliability
If conventional integrated HMD design is used, then display function is achieved, but aesthetic appearance deteriorates
Solution Approach 1:
The system is divided into a remote laser light engine and a head-mounted display apparatus. This segmentation allows the head-mounted apparatus to have a sleek, minimalistic design with only essential components (imaging device, display elements, optical components) visible on the user's face, while the bulky laser engine is housed separately, significantly improving aesthetic appearance.
Solution Approach 2:
The laser light engine is extracted from the head-mounted display apparatus and positioned remotely. This extraction removes bulky components from the wearable device, allowing for a more streamlined and aesthetically pleasing design on the user's face while the remote engine houses the necessary laser generation capabilities.
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 solution results in a more compact, lightweight, and aesthetically pleasing head-mounted display system with improved picture quality and reduced heat and power requirements, enhancing user experience and reducing development complexity.
Implementation Method 1
The imaging device creates laser images from the laser light transmitted through an optical cable
Implementation Method 2
The imaging device creates laser images from the laser light transmitted through an optical cable in accordance with the display signal
Implementation Method 3
The laser images are delivered to the display unit in order to create display images that can be viewed by a user
Data Source
AI summary
A head mounted display system is disclosed. The head mounted display system includes a remote laser light engine that generates laser light associated with a display signal. The head mounted display system additionally includes a head mounted display apparatus that is separated from the laser light engine and comprising a display unit that displays laser images. The head mounted display system further includes an imaging device coupled between the remote laser light engine and the head mounted display apparatus. The imaging device creates laser images from the laser light transmitted through an optical cable in accordance with the display signal. The laser images are delivered to the display unit in order to create display images that can be viewed by a user of the head mounted display apparatus.