Adjustable Projection Device Using Moving Optical Plate
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Solution Overview
Problem
Ultra-short-throw projection devices have limited flexibility and versatility due to their fixed projection size, restricting their usage.
Innovation Solution
A projection device design that includes an illumination system, optical engine module, and lens module on a moving plate, driven by a gearing and motor system, allowing for adjustment between positions to change the projection size, enabling zooming in and out.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If an ultra-short-throw projection device is designed with a fixed optical structure, then the device structure is simple and easy to manufacture, but the projection size is fixed and flexibility is reduced
Solution Approach 1:
The patent applies the dynamics principle by making the optical structure adjustable rather than fixed. The moving plate can shift position along the optical path, changing the effective focal length and thus the projection size. This dynamic adjustment mechanism resolves the contradiction by allowing the device to adapt to different projection size requirements while maintaining a relatively simple overall structure.
Solution Approach 2:
The patent implements universality by enabling the projection device to perform multiple functions - projecting images at different sizes and distances. The adjustable moving plate allows the same device to serve both as a standard projector and an ultra-short-throw projector, or to provide variable projection sizes, thereby increasing versatility without requiring multiple separate devices.
2Device complexity
If an ultra-short-throw projection device uses a fixed projection distance, then the optical system is simple, but the projection size cannot be adjusted
Solution Approach 1:
The moving plate that can adjust its position along the optical path embodies the dynamics principle. By changing the position of the moving plate, the effective focal length of the optical system changes, allowing adjustment of projection size and distance. This dynamic adjustment adds minimal complexity while significantly improving versatility.
Solution Approach 2:
The patent applies parameter changes by modifying the effective focal length of the optical system through the position adjustment of the moving plate. This changes key optical parameters (focal length, projection distance, projection size) without fundamentally altering the optical system structure, thus achieving versatility with controlled complexity.
3Adaptability or versatility
If the projection device allows zooming in and out, then flexibility and versatility are improved, but the device complexity increases
Solution Approach 1:
The zoom functionality is achieved through a dynamic moving plate that can be positioned at different locations along the optical path. This single dynamic component enables zooming in and out without requiring complex multi-element zoom lenses or multiple adjustable mechanisms, thus improving flexibility while controlling the increase in 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 device achieves a non-fixed projection size, enhancing flexibility and usability by allowing enlargement or reduction of the projection, thus overcoming the limitations of fixed projection size in ultra-short-throw devices.
Implementation Method 1
The drive element is configured to drive the gear element, such that the guide element is linked with the moving plate to move between a first position and a second position
Implementation Method 2
The linear sleeve is sleeved on the sliding rod, and the linear sleeve moves along the sliding rod
Data Source
AI summary
A projection device includes an illumination system providing an illumination light beam; an optical engine module disposed on a transmission path of the illumination light beam, and converting the illumination light beam into an image light beam; a lens module disposed on a transmission path of the image light beam, and projecting the image light beam out of the projection device; and an adjustment module including a moving plate, a guide element, a gearing element, and a driving element. The moving plate is disposed on the guide element. The guide element is connected to the gearing element. The driving element is configured to drive the gearing element, such that the guide element is linked with the moving plate to move between a first position and a second position. The illumination system, the optical engine module, and the lens module are disposed on the moving plate.