Motor-Integrated Diffusion Module for Laser Speckle Reduction
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Solution Overview
Problem
Conventional diffusion modules used in projection devices to reduce speckle caused by laser light sources are bulky, making it difficult to achieve miniaturization of the projection device.
Innovation Solution
A diffusion module with a smaller volume is designed by attaching a light diffusive material to the rotation plate of a motor, rather than using a large disk outside the motor, allowing for reduced size and vibration during rotation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If a conventional diffuser is disposed on a large rotating disk outside the motor, then the speckle phenomenon is effectively improved, but the volume of the diffusion module becomes large
Solution Approach 1:
The patent merges the diffuser with the motor's rotation plate by attaching the light diffusive material directly to the rotation plate. This integration eliminates the need for a separate large disk structure, thereby reducing the overall volume of the diffusion module while maintaining the speckle reduction function through the rotating diffuser mechanism.
2Object-affected harmful factors
If a large disk is used to rotate the diffuser, then the speckle phenomenon is reduced, but the size of the projection device increases
Solution Approach 1:
The diffuser is merged with the motor's rotation plate, eliminating the need for an external large disk. This integration reduces the length and overall size of the projection device while preserving the speckle reduction capability through the rotating motion of the integrated diffuser.
Solution Approach 2:
The patent repositions the diffuser from an external radial arrangement on a large disk to an integrated arrangement on the motor's rotation plate. This dimensional reorganization reduces the radial extent and overall footprint of the device while maintaining the rotational diffusing function.
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 diffusion module effectively reduces the coherence of laser light, suppressing the speckle phenomenon while achieving a smaller size, thus aligning with the trend of miniaturization in projection devices.
Implementation Method 1
a diffuser may be used to scatter a laser light to reduce the coherence of the laser light
Data Source
AI summary
A diffusion module including a motor, a washer, and a light diffusive material is provided. The motor has a rotation plate. The rotation plate is adapted to rotate around a central axis of the motor. The light diffusive material is sandwiched between the washer and the rotation plate.