Projection Device Adjusting Structure for AR Image Alignment
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Solution Overview
Problem
Conventional AR projection devices face challenges in fully adjusting the projection image to overlap two virtual images effectively, particularly in terms of movement and rotation, which affects the quality and positioning of the 3D image presented to the user.
Innovation Solution
A projection device with an adjusting structure that includes a base and an adjusting component rotatably connected along a first axis, allowing the projection module to rotate vertically, and a reflecting component rotatably connected along a second axis, enabling horizontal movement and rotation of the projection image, ensuring full adjustment of the projection image for AR applications.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If conventional angle-of-view correcting mechanisms with multiple moving plates are used, then the projection image can be adjusted, but the device complexity increases significantly
Solution Approach 1:
The adjusting structure is divided into multiple independent rotating components: a first rotating component for horizontal movement, a second rotating component for vertical movement, and a third rotating component for rotation adjustment. Each component handles a specific degree of freedom, allowing complex image positioning to be achieved through simpler, modular adjustments rather than a single complex mechanism.
Solution Approach 2:
The patent employs multiple rotatable components that can dynamically adjust the projection image in real-time. The first, second, and third rotating components can independently rotate to change the image position and orientation dynamically, providing adaptability without requiring a fixed complex mechanical structure.
2Ease of operation
If the projection device moves horizontally or vertically, then the projection image moves accordingly, but the image cannot be fully adjusted to overlap two virtual images effectively
Solution Approach 1:
The adjustment functionality is segmented into three independent rotating components, each responsible for a specific aspect: horizontal positioning, vertical positioning, and rotation. This segmentation allows each component to be optimized for its specific function while collectively providing comprehensive adjustment capability that exceeds simple horizontal/vertical movement.
Solution Approach 2:
The patent adds a rotational dimension to the traditional two-dimensional horizontal/vertical adjustment. By introducing the third rotating component that enables rotation around the optical axis, the system transforms from 2D positioning to 3D orientation control, allowing the projection image to be adjusted in all spatial dimensions for effective overlap with virtual images.
3Manufacturing precision
If the projection device rotates horizontally or vertically, then the projection image deforms, but precise rotation control is needed for proper image orientation
Solution Approach 1:
The rotating components are designed to rotate around specific axes (first axis for horizontal, second axis for vertical, third axis for rotation) that are perpendicular to the optical axis. This dynamic rotation around controlled axes allows the image to be reoriented without deformation, as each rotation occurs around a properly positioned axis rather than causing unintended distortion.
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 allows for precise movement and rotation of the projection image, enabling clear and bright overlapping of virtual images, enhancing the AR experience by ensuring accurate and effective projection adjustment.
Implementation Method 1
a reflecting component rotatably connected to the base along a second axis, wherein the reflecting component is adapted to rotate along the second axis so that the projection image moves horizontally
Data Source
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Figure 4C~5A
AI summary
A projection device includes at least one projection module (110) and at least one adjusting structure (120). The projection module (110) has an optical axis (OA) and is adapted to emit an image beam (L2). The image beam (L2) is transmitted to a projection target to form a projection image. The adjusting structure (120) includes a base (122) and an adjusting component (124). The adjusting component (124) is rotatably connected to the base (122) along a first axis (A1), and the projection module (110) is rotatably connected to the adjusting component (124) along the optical axis (OA). The adjusting component (124) and the projection module (110) are adapted to rotate along the first axis (A1) such that the projection image moves vertically, and the projection module (110) is adapted to rotate along the optical axis (OA) such that the projection image rotates.