Movable Projector Lens Switching for Multi-Surface Image Quality
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Solution Overview
Problem
The challenge of maintaining image quality when a projector moves and changes projection surfaces, such as from a wall to a floor, is not adequately addressed in existing technologies.
Innovation Solution
A movable projector design featuring a main body with wheels, a light source unit, multiple lens units, and a driving unit controlled by a processor to adjust lens positions based on changing projection surfaces, ensuring optimal image projection regardless of the surface.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the projector moves to change projection surfaces (e.g., from wall to floor), then the projector's mobility and versatility are improved, but image quality deteriorates
Solution Approach 1:
The patent implements a movable lens unit that can dynamically adjust its position along the optical axis based on the projection surface distance. The driving unit changes the lens unit's position from a first position to a second position when the projection surface changes, enabling the system to adapt to different projection distances and surfaces while maintaining focus and image quality
Solution Approach 2:
The processor detects when the projection surface has changed and automatically controls the driving unit to adjust the lens unit position accordingly. This feedback mechanism ensures that the lens unit is always at the correct position for optimal image projection on the current surface, preventing image quality deterioration
2Adaptability or versatility
If multiple lens units with different projection directions are added, then the ability to project on various surfaces is improved, but device complexity increases
Solution Approach 1:
The patent uses a single lens unit that can perform multiple functions by changing its position. The same lens unit projects images to different surfaces (wall, floor, ceiling) by being moved to different positions along the optical axis, eliminating the need for multiple dedicated lens units for each surface type
Solution Approach 2:
The movable lens unit dynamically reconfigures the optical path by changing its position, allowing one lens unit to replace what would traditionally require multiple fixed lens units. The driving unit enables this dynamic repositioning, simplifying the overall device structure while maintaining multi-surface projection capability
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 solution ensures consistent image quality by dynamically adjusting lens positions to match the current projection surface, allowing the projector to move freely while maintaining clear projections on various surfaces.
Implementation Method 1
a light source unit that moves with the main body, and that emits light; a plurality of lens units that have different directions for projecting the light
Data Source
AI summary
A movable projector may include: a main body; at least one wheel that moves the main body; a light source unit that moves with the main body, and that emits light; a plurality of lens units that have different directions for projecting the light; a driving unit that adjusts positions of the plurality of lens units; and a processor configured to, when the main body is moved by the at least one wheel so that the projection surface changes, control the driving unit to adjust a position of a lens unit of the plurality of lens units having a projection direction corresponding to the changed projection surface to a transmission position on a progression path of the light.