Optical Path Oscillation Control for Stable High-Resolution Display
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Solution Overview
Problem
Existing optical path control systems face challenges in oscillating optical parts at high speed and ensuring stable stopping, which affects the resolution and quality of projected images.
Innovation Solution
An optical path control apparatus with an oscillating part driven by a drive signal having a waveform with periods corresponding to the natural frequency of the oscillating part, including a first period for changing current values and a second period for holding them, stabilizing the oscillation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the optical part is oscillated at high speed to improve image resolution, then the resolution is improved, but the stability of stopping deteriorates
Solution Approach 1:
The drive signal is designed with periodic waveform characteristics where the first period length corresponds to the natural frequency of the oscillating part. This periodic action ensures that the oscillation builds up efficiently and can be stopped at predetermined positions with high stability, resolving the contradiction between high-speed oscillation for resolution and stable stopping for reliability
Solution Approach 2:
The invention changes the parameter of drive signal waveform, specifically setting the first period length to correspond to the natural frequency of the oscillating part. This parameter optimization enables the system to achieve both high-speed oscillation capability and stable stopping capability simultaneously
2Stability of the object's composition
If the drive signal waveform is optimized for natural frequency to improve oscillation stability, then the oscillation stability is improved, but the device complexity increases
Solution Approach 1:
The oscillating part utilizes its own natural frequency characteristic to achieve stable oscillation. By setting the drive signal's first period to match the natural frequency, the system leverages the inherent properties of the oscillating part itself rather than requiring complex external control mechanisms, thus improving oscillation stability without significantly increasing device complexity
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 apparatus achieves stable high-speed oscillation of the optical part, enhancing image resolution by shifting the optical path without image degradation.
Implementation Method 1
a length of the first period is a value corresponding to a natural frequency of the oscillating part
Data Source
AI summary
An optical path control apparatus includes an oscillating part including an optical member on which light is made incident; an actuator configured to oscillate the oscillating part; and a drive unit configured to apply to the actuator a drive signal with a waveform including a first period in which a current value is changed from a first current value to a second current value and including a second period that is continuous with the first period and in which the current value is held at the second current value, to cause the actuator to oscillate the oscillating part and to control an optical path. The drive unit applies the drive signal so that the length of the first period is a value corresponding to the natural frequency of the oscillating part.