Micromirror Multi-Angle Reflection for Compact Touch Projection
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Solution Overview
Problem
Conventional touch projection systems have limited micromirror rotation angles, making it difficult to configure components compactly and reducing the overall volume of the projector.
Innovation Solution
A touch projection system with a micromirror device that can be selectively positioned at multiple angled positions, allowing for nonparallel reflection directions, enabling more flexible placement of the image-capturing device and other components within a smaller projector casing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If the micromirror rotation angle is restricted to two states (ON and OFF), then the component structure can be disposed with less structural interference, but the projector volume cannot be effectively reduced
Solution Approach 1:
The micromirror device transitions from a static two-state system to a dynamic multi-state system, enabling continuous adjustment of reflection angles. This allows the system to adapt component positions and optimize space utilization, thereby reducing overall projector volume while maintaining operational flexibility.
Solution Approach 2:
The invention introduces additional angular dimensions beyond the conventional single-axis two-state rotation. By enabling multi-angular positioning in multiple dimensions, the system creates more spatial freedom for component arrangement, allowing compact integration of the image-capturing device and other components within a smaller volume.
2Device complexity
If the micromirror offers only two reflection directions (ON state and OFF state), then the component disposition is simpler, but the image-capturing device cannot be disposed conveniently
Solution Approach 1:
The micromirror device provides dynamically adjustable reflection directions beyond fixed two-state positioning. This enables the image-capturing device to be positioned at optimal angles for receiving image light, improving ease of disposition while maintaining manageable system complexity through controlled multi-position capability.
3Device complexity
If the micromirror rotates relative to a single axis with limited angles, then the structure is simpler, but the reflection directions are insufficient for compact component arrangement
Solution Approach 1:
The micromirror structure evolves from single-axis limited rotation to multi-angular positioning capability, providing adaptable reflection directions while maintaining reasonable structural complexity through efficient mechanical or electromagnetic actuation mechanisms.
Solution Approach 2:
The system incorporates additional rotational dimensions beyond single-axis operation, enabling the micromirror to achieve multiple reflection directions in three-dimensional space. This enhances adaptability for compact component arrangement while keeping the structural implementation feasible through optimized mechanical designs.
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 system achieves a more compact projector design by providing additional reflection directions for the image light, allowing for a larger disposition space and enabling the components to be disposed more flexibly, resulting in a smaller projector casing volume.
Implementation Method 1
The micromirror device is used for reflecting the projection light and the image light
Data Source
AI summary
A touch projection system includes a light source device, a micromirror device, and an image-capturing device. The micromirror device can provide three reflection directions. The micromirror device can selectively reflect projection light emitted by the light source device in one of the reflection directions to project the reflected projection light onto a screen to form an image. The micromirror device also can reflect image light from the screen in another one of the reflection directions. Further, the micromirror device can reflect the image light from the screen in the other one of the reflection directions, which has a larger deflection angle, to be received by the image-capturing device, for example for determining a touch operation performed on the screen. Thereby, the limitation of structural interference by other components to the image-capturing device is reduced, so that the touch projection system can be assembled in a compact configuration.