Retractable Reflective Screen for Portable Projection
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Solution Overview
Problem
Traditional home projection systems are not compatible with small, portable projection devices, and available surfaces often have undesirable optical characteristics, lacking privacy for viewing personalized content.
Innovation Solution
A portable apparatus featuring a flexible reflective screen and screen control mechanism that can be extended and retracted, integrated with a housing that includes a projector and screen adjustment mechanism to position the screen optimally for free-space light projection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If traditional home projection systems use large reflective screens, then image display quality is improved, but portability and ease of storage deteriorate
Solution Approach 1:
The screen is designed with a retractable mechanism that allows it to extend to a large size during projection for optimal image quality, then retract to a compact size for easy portability and storage. This dynamic transformation resolves the contradiction between large screen area and compact portability.
Solution Approach 2:
The screen structure incorporates a nested design where the screen material can be folded or rolled into a compact form that fits within or alongside the projection device housing, enabling the large screen to be stored in a small package.
2Stability of the object's composition
If traditional projection screens are permanently stored, then screen stability is improved, but adaptability to different viewing environments deteriorates
Solution Approach 1:
The screen transitions from a static permanently-mounted structure to a dynamic retractable system that can be deployed and retracted as needed, allowing the same screen to provide stable display when extended and compact storage when retracted, thus adapting to different environmental requirements.
Solution Approach 2:
The projection system with retractable screen is designed to function in multiple environments - both as a stable display when deployed and as a portable unit when retracted - making it universally adaptable to different viewing situations rather than being limited to a single fixed location.
3Device complexity
If available surfaces are used for projection, then device simplicity is improved, but optical characteristics and viewing privacy deteriorate
Solution Approach 1:
Instead of relying on unsuitable available surfaces, the invention extracts the projection function into a dedicated system with a specialized retractable screen designed specifically for optical projection, ensuring proper optical characteristics while maintaining overall system portability.
Solution Approach 2:
The retractable screen acts as an intermediary between the portable projection device and the viewing environment, providing a dedicated optical surface that mediates the projection process to ensure proper optical characteristics and viewing privacy regardless of the surrounding environment.
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 convenient, private, and efficient viewing of images from small portable projection devices by providing a flexible and adjustable reflective surface that can be easily positioned for optimal image reception.
Implementation Method 1
a sheet of reflective material suitable for forming a display screen
Data Source
AI summary
An apparatus is disclosed which may include a sheet of reflective material suitable for forming a display screen; a screen control mechanism operable to move the reflective material into extended and retracted positions, wherein the apparatus is portable and configured to receive image data from a hand-held projection device.