Projection Module Rotation for VR Image Alignment
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Solution Overview
Problem
Virtual reality projection devices face challenges in comprehensively adjusting projection images to overlap stereoscopic images effectively, as traditional adjustment methods do not account for the unique angle distribution and movement requirements of virtual reality applications.
Innovation Solution
A projection device with an adjusting structure that allows the projection module to rotate and move along specific axes, incorporating a base and adjusting elements to drive the light source, light valve, and lens set, enabling comprehensive adjustment of the projection image's movement and rotation to align virtual images correctly.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the projection device moves horizontally and vertically, then the projection image moves horizontally and vertically, but the image of the angle space distribution becomes dark without moving accordingly
Solution Approach 1:
The patent applies dynamics by making the projection module rotatable around the optical axis through the adjusting structure. This allows the system to dynamically adjust the angle of incident light entering the waveguide sheet, enabling the projection image to move correctly while maintaining proper angle space distribution. The rotating mechanism transforms a static projection system into a dynamic one that can adapt to different viewing angles and positions.
2Adaptability or versatility
If the projection device rotates horizontally or vertically, then the projection image becomes a trapezoid, but comprehensive adjustment for stereoscopic image overlap is not achieved
Solution Approach 1:
The adjusting structure serves multiple functions: it can rotate the projection module around the optical axis, adjust the incident light angle, and enable comprehensive positioning of the projection image. This multi-functional mechanism allows the same structure to handle both orientation adjustment and precise alignment for stereoscopic image overlap, eliminating the need for separate adjustment mechanisms.
3Adaptability or versatility
If traditional adjustment methods are used, then the projection device structure is simple, but the projection image cannot be comprehensively adjusted for virtual reality stereoscopic display
Solution Approach 1:
The patent merges the adjustment functions by integrating the adjusting structure directly with the projection module. The adjusting structure combines rotational and positional adjustment capabilities in a single integrated mechanism, reducing the need for multiple separate components while achieving comprehensive projection image adjustment for virtual reality applications.
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 precise adjustment of the projection image to ensure accurate overlap and presentation of stereoscopic images, improving the virtual reality experience by aligning the image beams correctly with human eyes.
Implementation Method 1
an image beam projected from the projection device is incident into a waveguide sheet for continuous total internal reflection and propagates forward
Data Source
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AI summary
A projection device including at least one projection module and at least one adjusting structure is provided. The projection module has at least one optical axis. The projection module is adapted to provide an image beam. The image beam is transmitted along a light transmission path to a projection target and forms a projection image. The adjusting structure is connected to the projection module. The adjusting structure is adapted to drive at least a part of the projection module to rotate along the optical axis such that the projection image rotates.