Projection Optical Instrument Vibration Mechanism
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Solution Overview
Problem
Conventional projection optical instruments face challenges with large-sized or complex mechanisms for vibrating projection optical members in two axial directions, which complicates the formation of a light-irradiated region as a surface.
Innovation Solution
A projection optical instrument design that includes a light source unit, a projection optical member, and a support part allowing the projection optical member to move orthogonally to the light source unit, with a vibration application unit that vibrates either the light source unit or the projection optical member, using bend parts and a vibration application unit to achieve this movement.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If a mechanism is designed to vibrate the projection optical member in two axial directions, then the light-irradiated region can be formed as a surface, but the mechanism becomes large-sized and complicated
Solution Approach 1:
Instead of vibrating the projection optical member in two axial directions to form a surface irradiation region, the patent inverts the approach by vibrating the light source unit in two axial directions. This achieves the same effect of illuminating different regions of the projection optical member over time, but with a simpler mechanism since the light source unit is easier to vibrate than the projection optical member.
Solution Approach 2:
The patent uses vibration of the light source unit to create a time-averaged illumination pattern that copies the effect of surface irradiation. By rapidly vibrating the light source in two directions, the human eye perceives a continuous surface illumination, effectively copying the result of complex two-axis projection member vibration without the mechanical complexity.
2Manufacturing precision
If a mechanism is designed to vibrate the projection optical member in two axial directions, then the light-irradiated region can be formed as a surface, but the mechanism becomes large-sized
Solution Approach 1:
The patent inverts which component is vibrated - instead of vibrating the large projection optical member, it vibrates the smaller light source unit. This achieves the same surface illumination effect while significantly reducing the size of the moving parts and overall mechanism volume.
Solution Approach 2:
The patent adds the time dimension through vibration, transforming a static two-axis positioning problem into a dynamic single-point vibration problem. By vibrating the light source in two directions over time, the system achieves surface coverage without needing two independent positioning mechanisms, thereby reducing volume.
3Stability of the object's composition
If conventional vibration mechanisms are used, then the projection optical member can be oscillated, but the mechanism becomes complicated
Solution Approach 1:
The patent inverts which component undergoes oscillation - instead of oscillating the projection optical member through complex mechanisms, it oscillates the light source unit. This maintains the stability and optical quality of the projection member while achieving the desired light distribution effect with a simpler vibration mechanism.
Solution Approach 2:
The patent uses the light source unit as an intermediary to achieve the oscillation effect. Rather than directly oscillating the projection optical member, the vibrating light source acts as a mediator that creates the same effect on the optical system with less mechanical 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
This design allows for the formation of a light-irradiated region like a surface using a simple mechanism, stabilizing the characteristics of the projection light and enabling downsizing and simplification of the optical instrument.
Implementation Method 1
When vibration is applied to at least one of the light source unit and the projection optical member, the projection optical member accordingly vibrates with respect to the light source unit in a direction orthogonal to the optical axis direction of the light source unit
Data Source
AI summary
A projection optical instrument includes a light source unit, a projection optical member and a support part. The light source unit emits light. The projection optical member transforms the light emitted from the light source unit into projection light. The support part supports the projection optical member to be movable with respect to the light source unit in at least one direction orthogonal to an optical axis direction of the light source unit. When vibration is applied to at least one of the light source unit and the projection optical member, the projection optical member accordingly vibrates with respect to the light source unit in a direction orthogonal to the optical axis direction of the light source unit.