Projector Optical Shift Mechanism for Equal-Resolution Multi-Screen Projection
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Solution Overview
Problem
Existing projectors divide the image display device into multiple areas for projection, leading to significantly lower resolution due to overlapping angles of view and optical systems.
Innovation Solution
A projection system with a shift mechanism that adjusts the second optical system relative to the light modulation device, allowing for selective projection on different positions and angles, using a first and second optical system to project enlarged images on separate screens with equal resolution.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the image display device is divided into multiple display areas for simultaneous projection, then multi-screen projection capability is improved, but resolution deteriorates significantly
Solution Approach 1:
The patent employs a movable optical system that can dynamically switch between different projection modes. The optical system includes a lens assembly that can be positioned at different locations along the optical path, allowing the device to transition between single-screen high-resolution mode and multi-screen projection mode, thereby resolving the contradiction between versatility and resolution
Solution Approach 2:
The patent divides the projection function into separate optical paths. By using a beam splitter and movable optical system, the single image display device can selectively project to one or multiple screens, with the segmentation allowing full utilization of the display area for high resolution while enabling multi-screen capability when needed
2Adaptability or versatility
If multiple optical systems are used for different projection planes, then projection flexibility is improved, but optical axis misalignment occurs
Solution Approach 1:
The patent uses a single movable optical system that serves multiple functions: it can project to a single screen with high resolution, or split the projection to multiple screens at different angles. This universal optical system eliminates the need for multiple fixed optical systems, thereby preventing optical axis misalignment while maintaining projection flexibility
Solution Approach 2:
The patent introduces a beam splitter as an intermediary optical element that enables the single optical system to divide the projection path to multiple screens. The beam splitter acts as a mediator that maintains optical axis alignment while providing the flexibility to project to multiple planes simultaneously
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 system enables projection of enlarged images with equal resolution on multiple screens by adjusting the optical systems, suppressing optical axis misalignment and allowing for varying projection distances and angles, enhancing image quality and flexibility.
Implementation Method 1
a second optical system located between the first optical system and the light modulation device
Implementation Method 2
the second optical system includes two mirrors provided in positions apart from the optical axis of the common optical system
Data Source
AI summary
A projector has a light modulation device and a projection mechanism. The projection mechanism has a first optical system, a second optical system and a shift mechanism shifting the second optical system. The shift mechanism shifts the second optical system to a first position and a second position different from the first position in directions orthogonal to an optical axis of the second optical system.