Projection Lens Shift Mechanism for Ultra-Wide Angle Displays
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Solution Overview
Problem
The challenge is to create a projection type image display device and optical system that supports ultra-wide angles while maintaining brightness and reducing costs, as existing systems with ultra-wide angles tend to be costly and complex due to the need for large curved reflective surfaces and significant screen position shifts.
Innovation Solution
The solution involves a projection optical system with a first lens system and a second lens system, where the position of the first lens system is shifted perpendicular to the optical axis based on an optical zoom factor, allowing for screen shift and magnification functions without moving the image modulation element, thereby simplifying the configuration and reducing costs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If an optical system with a large curved reflective surface is configured to support ultra-wide angle, then brightness is improved, but device complexity and cost increase
Solution Approach 1:
The projection optical system is divided into multiple lens systems (first lens system, second lens system, third lens system) that can be independently adjusted. This segmentation allows each subsystem to be optimized separately, reducing overall system complexity while maintaining ultra-wide angle performance and brightness.
Solution Approach 2:
The patent implements dynamic adjustability by allowing independent movement of the first lens system perpendicular to the optical axis and independent adjustment of the second lens system along the optical axis. This dynamic configuration enables the system to achieve ultra-wide angle projection with high brightness without requiring a fixed complex optical path.
2Ease of operation
If the position of the first lens system is shifted perpendicular to the optical axis, then screen position is adjusted, but optical alignment complexity increases
Solution Approach 1:
The first lens system serves multiple functions: it can be shifted perpendicular to the optical axis to adjust screen position and can also be adjusted along the optical axis to control magnification. This multi-functionality reduces the need for separate adjustment mechanisms, simplifying the overall system while improving ease of operation.
Solution Approach 2:
The second lens system acts as an intermediary that remains adjustable along the optical axis independently. This intermediary element mediates between the perpendicular shift of the first lens system and the final image projection, maintaining optical alignment simplicity while enabling screen position adjustment.
3Stability of the object's composition
If the position of the image modulation element is kept unchanged during lens system shifting, then image stability is improved, but adjustment mechanism complexity increases
Solution Approach 1:
The image modulation element is extracted from the moving components and kept fixed in position. By separating the modulation element from the adjustable lens systems, the patent achieves image stability while the lens systems can be independently adjusted to control screen position and magnification without affecting the modulation element's position.
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 approach enables an easy, small, and inexpensive configuration for ultra-wide angle projection systems, maintaining image quality and brightness while allowing for flexible screen positioning and size adjustments, thus addressing the cost and complexity issues of existing systems.
Implementation Method 1
a projection optical system including at least a first lens system and a second lens system configured to project the image modulated by the modulation element
Implementation Method 2
a projection optical system including at least a first lens system and a second lens system configured to project the image modulated by the modulation element
Data Source
AI summary
A system including a light source configured to illuminate light onto an image modulation element; a projection optical system including at least a first lens system and a second lens system configured to project the image modulated by the modulation element; and circuitry configured to shift a position of the first lens system in a direction perpendicular to an optical axis of the projection optical system based on an optical zoom factor, wherein a position of the image modulation element is unchanged when the circuitry shifts the position of the first lens system.