Projection Device Reflecting Element Horizontal Vertical Adjustment
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Solution Overview
Problem
In virtual reality projection devices, comprehensive adjustment of the projection image to overlap two virtual images and maintain image quality is challenging, as movement and rotation affect the angle distribution of the image beam, leading to dark or distorted images without proper alignment.
Innovation Solution
A projection device with a reflecting element and an adjusting structure that allows the projection image to move horizontally and vertically by rotating along perpendicular axes, ensuring the image beam is correctly aligned with the waveguide sheet to maintain image quality and overlap virtual images effectively.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the projection device moves horizontally and vertically, then the projection image moves accordingly, but the angle distribution of the image beam is affected causing the image to become dark
Solution Approach 1:
A reflecting element is introduced as an intermediary between the projection module and the waveguide sheet. This reflecting element can rotate around a rotation axis to adjust the angle of the image beam incident on the waveguide sheet, thereby decoupling the position adjustment from the angle adjustment and preventing image darkening
Solution Approach 2:
The reflecting element is made rotatable around a rotation axis, enabling dynamic adjustment of the image beam angle. This dynamic adjustment allows the system to adapt to different positions while maintaining optimal angle distribution and image brightness
2Adaptability or versatility
If the projection device rotates horizontally or vertically, then the projection image changes shape to a trapezoid, but comprehensive adjustment for stereoscopic image overlap is insufficient
Solution Approach 1:
The reflecting element is designed to rotate around a rotation axis that is perpendicular to the optical axis, enabling dynamic adjustment of both horizontal and vertical angles. This provides comprehensive adaptability for image orientation while maintaining precise alignment through controlled rotation
Solution Approach 2:
The rotation axis of the reflecting element is positioned perpendicular to the optical axis, adding a new dimension of adjustment. This allows independent control of image angle in both horizontal and vertical directions, enabling precise stereoscopic image overlap
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 enables comprehensive adjustment of the projection image, allowing for precise movement and rotation, ensuring clear and aligned stereoscopic images by adjusting the reflecting element along specific axes, thereby addressing the challenge of maintaining image quality and overlap in virtual reality applications.
Implementation Method 1
The reflecting element is disposed between the at least one projection module and the projection target and located on the optical axis and has a reflecting surface. The reflecting surface is adapted to reflect the projection beam to the projection target.
Implementation Method 2
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, at least one reflecting element, and at least one adjusting structure is provided. The projection module has at least one optical axis. The projection module is adapted to provide a projection beam. The projection beam is transmitted along a light transmission path to a projection target to form a projection image. The reflecting element is disposed between the at least one projection module and the projection target and located on the optical axis and has a reflecting surface, wherein the reflecting surface is adapted to reflect the projection beam to the projection target. The adjusting structure is connected to the reflecting element. The adjusting structure is adapted to drive the reflecting element to rotate along a first axis such that the projection image moves horizontally.