Projection Lens Module Actuator Positioning for Compact Optical Engine
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Solution Overview
Problem
The existing transmissive smooth picture (TSP) actuator in projectors, with its coil structure, poses challenges in reducing the volume of the optical engine and projector, leading to design difficulties, stability issues, and increased costs, particularly in the development of pico projectors.
Innovation Solution
The smooth picture actuator is positioned outside the optical engine and integrated into the projection lens module, allowing it to be fixed to the projection lens without affecting the optical engine's size, thereby enabling a reduction in the optical engine's volume and facilitating the design of pico projectors.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the TSP actuator with coil structure is integrated into the optical engine, then the image resolution is improved, but the volume of the optical engine increases
Solution Approach 1:
The patent divides the projector system into separate functional modules: the optical engine and the projection lens module. The TSP actuator is assigned to the projection lens module rather than being integrated into the optical engine. This segmentation allows the optical engine to maintain a compact size while the TSP actuator is housed in a separate module that can be positioned elsewhere in the optical path.
Solution Approach 2:
The patent relocates the TSP actuator from the internal space of the optical engine to an external position in the optical path, effectively utilizing spatial dimensionality. By placing the TSP actuator in the projection lens module outside the optical engine, the design transforms a three-dimensional space constraint problem into a spatial arrangement problem, allowing both the compact optical engine and the TSP actuator to coexist without volume conflict.
2Volume of stationary object
If the outer frame of the TSP actuator is reduced to decrease volume, then the size is reduced, but the stability and design difficulty worsen
Solution Approach 1:
The patent extracts the TSP actuator from the optical engine structure and places it in a separate projection lens module. This extraction allows the TSP actuator to have its own dedicated housing and mounting structure, which can be optimized for stability without being constrained by the need to reduce optical engine volume. The separate module provides a stable platform for the TSP actuator while maintaining overall system compactness.
3Measurement precision
If the TSP actuator is integrated into the optical engine, then the picture quality is improved, but the projector volume and design complexity increase
Solution Approach 1:
The patent segments the projector into distinct modules with clear functional boundaries. The TSP actuator is integrated into the projection lens module rather than the optical engine, creating a modular architecture. This segmentation simplifies the design process by allowing each module to be designed and optimized independently, reducing overall system complexity while maintaining picture quality enhancement capabilities.
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 configuration allows for a reduced volume of the optical engine and projector, improving the design and cost-effectiveness while maintaining high image resolution, enabling the development of compact pico projectors with enhanced stability and flexibility.
Implementation Method 1
The TSP actuator drives thin flat glass through a voice coil motor, to periodically swing back and forth in a specific direction, and then matches with a specific frequency of the DMD and the visual persistence effect of human eyes
Data Source
AI summary
A projection lens module and a projector are provided. The projector includes an optical engine and a projection lens module. The optical engine includes a casing, a light source, a light valve, and a prism, where the light source, the light valve, and the prism are disposed in the casing. The light source emits an illumination beam to the light valve. The light valve modulates the illumination beam to generate an image beam and projects the image beam to the projection lens module. The prism is disposed on an optical path of the image beam. The projection lens module is connected to the casing of the optical engine and is configured to project the image beam. The projection lens module includes a projection lens and a smooth picture actuator, where the smooth picture actuator is fixed to the projection lens and is located outside the optical engine.