Projection Lens Module Dynamics for Variable Image Size
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Solution Overview
Problem
Existing ultra short focal projection devices can only project images of a single size, requiring the entire device to be moved to adjust image size and often wasting space as they need to be positioned far from the projection target to achieve larger images.
Innovation Solution
A projection device with a movable projection lens module controlled by a processor and driving member, allowing the lens to adjust its position relative to the device to change image size without moving the entire device, using sensors to determine the optimal position and store mapping relationships for future use.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the entire projection device is moved to adjust image size, then the projected image size can be changed, but the device complexity increases and space is wasted
Solution Approach 1:
The projection device is segmented into a fixed main body and a movable projection lens module. The projection lens module can be independently moved relative to the main body to adjust image size, while the main body remains stationary. This segmentation allows image size adjustment without moving the entire device, reducing complexity and space requirements.
Solution Approach 2:
The projection lens module is designed to be dynamically movable relative to the main body through a driving mechanism. The movable distance of the projection lens module can be adjusted to change the projected image size, providing dynamic adaptability without requiring the entire device to be moved.
2Adaptability or versatility
If the projection device is positioned far from the projection target to achieve large images, then large image size is obtained, but available space is wasted
Solution Approach 1:
The projection lens module can be moved dynamically to adjust the projected image size. When a large image is needed, the projection lens module is moved to an extended position, allowing large images to be projected without placing the entire device far from the target, thus saving space.
Solution Approach 2:
The projection lens module can be retracted into or extended from the main body housing. When not in use or when small images are needed, the projection lens module is positioned within the housing, minimizing the occupied space. When large images are needed, it extends outward to achieve the required projection size.
3Ease of manufacture
If the projection device structure is simplified to reduce complexity, then manufacturing is easier, but image size adjustment capability is lost
Solution Approach 1:
The device is divided into a fixed main body and a movable projection lens module with independent driving mechanisms. This segmentation allows the main body to be manufactured with simple structure while the projection lens module incorporates the adjustment mechanism, balancing manufacturing ease with functionality.
Data Source
AI summary
A projection device and a control method of the projection device are provided. The control method of the projection device includes following steps. Position information of the projection device is obtained by a sensor. A first moving signal is generated by at least one processor according to the position information. According to the first moving signal, a projection lens module is controlled by a driving member to move relative to the projection device.