Scanning Device Frequency Characteristic Design for Trajectory Stability
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Solution Overview
Problem
Laser scanning display technologies face challenges in achieving stable and controlled scanning trajectories due to nonlinear vibrations, leading to instability and deviations from ideal raster scanning, which affect display quality.
Innovation Solution
A scanning device with two axes that vibrate at different frequencies, with specific frequency characteristics configured to minimize significant peaks in the frequency range, allowing for controlled driving conditions to be set, thereby reducing nonlinear responses and maintaining an ideal scanning trajectory.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If the scanning device operates in a high-frequency vibration state to achieve good display effect, then the display quality is improved, but the scanning trajectory becomes unstable and deviates from ideal raster scanning due to nonlinear vibrations
Solution Approach 1:
The patent changes the frequency parameters of the two scanning axes by designing different frequency characteristics for each axis. Specifically, it configures the frequency characteristics such that the quantity of significant peaks on the frequency characteristic curve does not exceed a set quantity in a set frequency range, and the difference between the quantity of significant peaks of the first scanning axis and the second scanning axis is within a set range. This parameter optimization reduces nonlinear vibrations and stabilizes the scanning trajectory while maintaining high-frequency operation for good display quality.
2Device complexity
If the frequency characteristics of the two scanning axes are made similar to simplify design, then the device complexity is reduced, but the nonlinear vibration effects increase and scanning precision deteriorates
Solution Approach 1:
The patent applies local quality by assigning different frequency characteristics to different scanning axes. The first scanning axis and the second scanning axis are configured with distinct frequency characteristics tailored to their specific functions, rather than using a uniform frequency design. This allows each axis to be optimized for its particular role in the scanning process, reducing nonlinear vibrations and improving scanning precision while maintaining manageable design complexity through systematic configuration.
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 ensures stable and accurate scanning trajectories, improving the display quality by reducing nonlinear effects and enhancing fault tolerance to manufacturing deviations, resulting in a more controlled and precise scanning display.
Implementation Method 1
The scanning device performs raster scanning in an operating state and includes at least two scanning axes capable of vibrating in a first direction and a second direction
Implementation Method 2
the scanning device is in a high-frequency vibration state and becomes a complex vibration system
Data Source
AI summary
A scanning device, a driving condition setting method, and a scanning display module are provided. The scanning device includes two scanning axes capable of vibrating in a first direction and a second direction. The two scanning axes have different frequency characteristics, and the frequency characteristics of the two scanning axes satisfy that a quantity of significant peaks on a frequency characteristic curve does not exceed a set quantity in a set frequency range.