Curved Reflection Device for Distortion-Free Desktop Projection
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Solution Overview
Problem
Conventional projection apparatuses struggle to project images onto desktops without distortion, requiring complex ceiling mounting and limiting portability and applicability.
Innovation Solution
A desktop projection apparatus featuring a curved surface reflection device, extension rod, and containing sink, which allows for reduced obliquity and amplification of the image frame, enabling easy repositioning and portability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the projection apparatus is disposed on a desktop, then the image frame can be projected onto the desktop, but the image frame has a trapezium shape due to oblique projection and objects become deflective
Solution Approach 1:
The patent introduces a curved surface reflection device with a specific curved reflective surface that reflects the image beam to the surface. This curved geometry compensates for the oblique projection by transforming the trapezium-shaped image into a substantially rectangular image frame, thereby maintaining image shape accuracy while keeping the apparatus on a desktop
Solution Approach 2:
The curved surface reflection device acts as an intermediary optical element between the projection lens and the surface. It receives the oblique image beam from the projection lens and redirects it to the surface at a different angle, effectively mediating the projection process to achieve a rectangular image shape
2Manufacturing precision
If the projection apparatus is hung to the ceiling, then the image frame can be projected onto the desktop with correct shape, but time and cost are spent for assembling and reassembling is required when position changes
Solution Approach 1:
The patent divides the projection apparatus into separable components: a housing containing the optical engine and projection lens, and a separate curved surface reflection device that can be attached or detached. This segmentation allows the apparatus to be easily assembled and disassembled without requiring complex ceiling mounting structures, thereby reducing assembly complexity while maintaining image shape accuracy
Solution Approach 2:
The curved surface reflection device is designed to be movable and repositionable. The extension rod allows the reflection device to be adjusted between different positions (contained in containing space or protruding out), enabling the apparatus to be easily moved from one location to another without requiring disassembly or reassembly of the entire system
3Manufacturing precision
If the projection apparatus is assembled to the ceiling, then the image frame can be projected correctly, but the apparatus cannot be carried to other places for utilization
Solution Approach 1:
By separating the projection apparatus into a housing unit and a curved surface reflection device that can be independently attached or detached, the system becomes portable. The reflection device can be attached when projection is needed and detached for storage or transport, thereby providing both image shape accuracy and portability
Solution Approach 2:
The movable extension rod allows the curved surface reflection device to be dynamically positioned. When not in use, the reflection device can be retracted into the containing space, making the apparatus compact and portable. When needed, it can be extended and positioned to provide correct image projection, thus achieving both portability and projection accuracy
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 provides a non-distorted, rectangular image projection and increased portability by minimizing assembly requirements and enhancing usability across various surfaces.
Implementation Method 1
The curved surface reflection device has a curved reflective surface capable of reflecting the image beam to the surface to form the image frame
Data Source
AI summary
A projection apparatus adapted to be disposed on a surface and adapted to project an image frame onto the surface is provided. The projection apparatus includes a housing, an optical engine, a projection lens, a containing sink, an extension rod, and a curved surface reflection device. The optical engine is disposed in the housing, and capable of providing an image beam. The projection lens is disposed in the transmission path of the image beam. The containing sink is disposed on the housing and has a containing space. The extension rod is movably connected to the containing sink. The curved surface reflection device is pivotally connected to the extension rod. The extension rod and the curved surface reflection device are adapted to be contained in the containing space. The curved surface reflection device has a curved reflective surface capable of reflecting the image beam to the surface.