Head Mounted Display Vertical Optical Path Reduces Horizontal Area
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Solution Overview
Problem
Conventional head-mounted displays have complex structures, large sizes, and heavy weights, which compromise wearing convenience and comfort due to their bulkiness.
Innovation Solution
A head-mounted display design featuring a configuration with a first and second light source module, a light reversely turning module, an image output module, eyepiece modules, and a beam splitting mirror, which reduces the horizontal area by altering the optical paths and locating components at different heights, allowing for stereoscopic image generation while minimizing size.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If conventional head mounted display structure is used, then stereoscopic image display function is achieved, but horizontal area and device size become large
Solution Approach 1:
The patent applies dimensionality change by transitioning from a horizontal arrangement to a vertical arrangement of optical components. The light source module, image output module, and eyepiece module are stacked vertically along the optical axis, with the light reversely turning module folding the optical path between them. This vertical stacking reduces the horizontal footprint while maintaining the stereoscopic display function through proper optical path design.
Solution Approach 2:
The patent implements nesting by integrating multiple optical functions within a compact vertical structure. The light reversely turning module is positioned between the light source module and image output module, folding the optical path through itself. This nested arrangement allows the optical components to be contained within a smaller overall volume, reducing the horizontal area while preserving the complete stereoscopic imaging pathway.
2Device complexity
If conventional head mounted display structure is used, then stereoscopic image display function is achieved, but device complexity increases
Solution Approach 1:
The patent merges multiple optical functions into an integrated compact structure. The light reversely turning module serves dual purposes: it folds the optical path to reduce horizontal area while also positioning the light source module and image output module at different vertical levels. This merging of path-folding and positioning functions into a single structural arrangement reduces overall device complexity compared to separate components.
Solution Approach 2:
The light reversely turning module acts as a multi-functional element that simultaneously achieves optical path folding, vertical positioning of components, and compact structure formation. This universal component performs multiple functions that would traditionally require separate elements, thereby reducing the overall structural complexity while maintaining the stereoscopic display 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 design enhances wearing convenience and comfort by reducing the horizontal area, enabling a more compact and efficient stereoscopic image display system.
Implementation Method 1
the light reversely turning module is optically coupled between the first light source module and the image output module, making a propagating direction of the first light in reverse to a propagating direction of the first image light
Implementation Method 2
The beam splitting mirror is optically coupled between the image output module and the first eyepiece module, and the beam splitting mirror is configured to guide the first image light into the first eyepiece module
Implementation Method 3
The first eyepiece module is configured to make the first image light image to a first target position. Similarly, the second eyepiece module is configured to make the second image light image to a second target position
Data Source
AI summary
A head mounted display includes first and second light source modules, a light reversely turning module, an image output module, first and second eyepiece modules, and a beam splitting mirror. The first and second light source modules are respectively configured to emit first and second lights. The image output module is configured to receive the first and second lights, generating first and second image lights with corresponding image information respectively. The light reversely turning module is optically coupled between the first light source module (or the second light source module) and the image output module, making a propagating direction of the first light (or the second light) in reverse to that of the first image light (or the second light). The beam splitting mirror is optically coupled between the image output module and the first/second eyepiece module, guiding the first/second image light into the first/second eyepiece module.