Optical Module Center of Gravity Alignment for Rotational Inertia
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Solution Overview
Problem
Conventional optical modules with optical vibration technology face excessive rotational inertia due to asymmetrical mass distribution, leading to delayed oscillation when using a single driving unit, which is not cost-effective for high-resolution projectors.
Innovation Solution
The optical module design positions the rotation axis through the center of gravity of the rotating structure, allowing a single driving unit to be asymmetrically disposed without causing excessive rotational inertia, ensuring symmetrical mass distribution and preventing delays in actuation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a single driving unit is disposed asymmetrically to reduce device complexity and weight, then device complexity and weight are reduced, but rotational inertia becomes excessive causing delayed oscillation
Solution Approach 1:
The patent applies asymmetry principle by intentionally positioning the single driving unit asymmetrically relative to the optical element, and more importantly, by offsetting the rotation axis from the geometric center of the optical element. This asymmetric configuration allows the mass distribution to be balanced relative to the rotation axis, achieving symmetrical mass distribution that reduces rotational inertia while maintaining the benefit of using only one driving unit instead of two symmetric driving units
2Device complexity
If the rotation axis passes through the geometric center of the optical element, then the optical path is simplified, but mass distribution becomes asymmetrical causing excessive rotational inertia
Solution Approach 1:
The patent applies the counterweight principle by offsetting the rotation axis from the geometric center of the optical element in a specific direction. This offset creates a counterbalancing effect where the mass distribution becomes symmetrical relative to the rotation axis, effectively counteracting the asymmetry that would otherwise cause excessive rotational inertia. The rotation axis position is carefully chosen to balance the mass distribution
Data Source
AI summary
An optical module including a base and a rotating structure is provided. The rotating structure includes a frame and an optical element. The frame has at least one shaft portion. The frame is connected to the base through the shaft portion, and is configured to oscillate relative to the base along a rotation axis by taking the shaft portion as a rotating shaft. The optical element is disposed within the frame. The rotation axis passes through a center of gravity of the rotating structure. In addition, a projector having the optical module is also provided. The invention can prevent the rotating structure of the optical module from having an excessive rotational inertia.