Piezoelectric Light Diffuser for Laser Scintillation Removal
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing projector technologies face challenges in effectively removing scintillation, particularly with high interference from laser light, due to inefficiencies in light diffuser movement, leading to unsatisfactory image quality and practicality issues related to vibration, noise, and power consumption.
Innovation Solution
A projector system utilizing a light diffusing unit vibrated by a piezoelectric element at its unique resonance frequency, which reduces light interference and scintillation, featuring a compact and silent design with low power consumption, and adjustable vibration modes to optimize scintillation removal.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If an electric motor or linear actuator is used to move the light diffuser, then the light diffuser can be moved to dynamically change the speckle pattern, but the response speed is insufficient and the device becomes complex with high power consumption
Solution Approach 1:
The patent replaces the mechanical motion system (electric motor or linear actuator) with a piezoelectric element that directly generates ultrasonic vibration. This substitution eliminates the need for complex mechanical transmission components while achieving much faster response speed (ultrasonic frequency range) for moving the light diffuser, thereby resolving the contradiction between response speed and device complexity
Solution Approach 2:
The patent applies mechanical vibration at ultrasonic frequency through the piezoelectric element to move the light diffuser. By utilizing resonance vibration, the system achieves rapid and efficient movement of the light diffuser without requiring complex mechanical drive mechanisms, thus improving response speed while simplifying the overall device structure
2Ease of operation
If an electric motor is used to move the light diffuser, then the speckle pattern can be changed, but vibration and noise increase
Solution Approach 1:
The patent utilizes ultrasonic vibration at a specific resonance frequency of the light diffuser to achieve effective scintillation removal. By operating at resonance, the piezoelectric element generates sufficient vibration amplitude with minimal input power, effectively reducing scintillation while minimizing unwanted vibrations and noise compared to electric motor-driven systems
3Object-affected harmful factors
If a light diffuser is moved using traditional actuators, then scintillation can be reduced, but power consumption increases
Solution Approach 1:
The patent employs ultrasonic resonance vibration of the light diffuser to effectively reduce scintillation. By exciting the light diffuser at its natural resonance frequency through the piezoelectric element, the system achieves maximum vibration amplitude with minimum energy input, thereby reducing scintillation effectiveness while minimizing power consumption compared to traditional actuator-based systems
Solution Approach 2:
The patent replaces energy-inefficient mechanical actuators with a piezoelectric element that directly converts electrical energy to mechanical vibration at ultrasonic frequencies. This substitution eliminates energy losses associated with mechanical transmission components and achieves more efficient energy utilization for scintillation removal, thereby reducing overall power consumption
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 reliable scintillation removal with improved image sharpness, reduced noise, and lower power consumption, enhancing the practicality and effectiveness of the projector.
Implementation Method 1
a vibration generating unit that has a piezoelectric element for vibrating the light diffusing unit by its vibration
Implementation Method 2
a light diffusing unit that is vibratably provided to diffuse incident light by a vibration and to emit diffused light
Implementation Method 3
a control unit that controls the vibration generating unit to vibrate the light diffusing unit at a frequency corresponding to a unique resonance frequency of the light diffusing unit
Data Source
AI summary
A projector includes a light diffusing unit that is vibratably provided to diffuse incident light by a vibration and to emit diffused light, the light diffusing unit having a unique resonance frequency, a vibration generating unit that has a piezoelectric element for vibrating the light diffusing unit, and a control unit that controls the vibration generating unit to vibrate the light diffusing unit at a frequency corresponding to the unique resonance frequency of the light diffusing unit. An image is displayed using the diffused light emitted from the light diffusing unit.