Integrated Lens Retainer for Precise Projection Display Positioning
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Solution Overview
Problem
Existing lens position accuracy in projection display devices is inadequate, necessitating improvements for precise lens positioning and stability.
Innovation Solution
A lens retaining device with a first shifter that moves in a first direction perpendicular to the optical axis, supported by a second shifter moving in a second direction perpendicular to both, featuring an integrally formed lens retainer and drive mechanism, utilizing metal materials for enhanced mechanical strength and stability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If a separate lens retainer and first main body are used, then ease of manufacture is improved, but lens position accuracy deteriorates
Solution Approach 1:
The patent merges the lens retainer and the first main body into a single integrally formed component. This eliminates the interface between separate parts, preventing cumulative manufacturing errors and ensuring high lens position accuracy while maintaining ease of manufacture through一体化 production processes.
2Strength
If metal materials are used for the first main body and lens retainer, then mechanical strength is improved, but resistance to environmental factors deteriorates due to thermal expansion
Solution Approach 1:
By forming the lens retainer and first main body as a single integral metal component, the patent creates a unified thermal expansion behavior. The integrated structure ensures that thermal expansion occurs uniformly throughout the component, maintaining lens positioning accuracy despite temperature changes, while preserving the high mechanical strength of metal materials.
Data Source
AI summary
A lens retaining device includes a first shifter and a second shifter. The first shifter holds a lens and moves in a first direction perpendicular to an optical axis direction of the lens. The second shifter supports the first shifter and moves in a second direction perpendicular to the optical axis direction and the first direction. The first shifter includes a first main body moves in the first direction, a lens retainer that is provided on the first main body and retains the lens, and a first drive portion that moves the first main body. The lens retainer is integrally formed with the first main body.