Projection Lens Support with Position-Arrangement Member for Mirror Alignment
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Solution Overview
Problem
Conventional image projection systems suffer from trapezoidal distortion and vignetting due to manufacturing and assembly errors in the arrangement of reflection mirrors and lenses, leading to suboptimal image projection quality.
Innovation Solution
A novel projection optical device is designed with a reflection mirror, a plurality of projection lenses, and a position-arrangement member that supports the lenses to accurately position the reflection mirror, reducing the number of parts involved in the assembly and thus minimizing errors, and using a resin material for the mirror supporting member to reduce costs and weight.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If multiple separate components (projection lens supporting member, reflection mirror supporting member, reflection mirror) are used to assemble the optical system, then the device can be manufactured with standard parts, but manufacturing and assembly errors accumulate causing trapezoidal distortion and vignetting
Solution Approach 1:
The patent merges the projection lens supporting member and reflection mirror supporting member into a single integrated supporting member. This integration eliminates the assembly interface between separate components, preventing accumulation of manufacturing and assembly errors that would otherwise cause trapezoidal distortion and vignetting in the optical projection system.
Solution Approach 2:
The patent introduces a position-arrangement member as an intermediary component that provides precise positioning for the reflection mirror on the integrated supporting member. This intermediary mechanism ensures accurate spatial arrangement of optical components while maintaining the benefits of integration, thereby reducing positioning errors without sacrificing ease of assembly.
2Strength
If a metal material is used for the mirror supporting member to ensure structural strength, then the supporting member has sufficient mechanical strength, but the overall device weight and cost increase
Solution Approach 1:
The patent changes the material parameter of the mirror supporting member from traditional metal to resin material. This material substitution maintains sufficient structural strength for the application while significantly reducing the weight and cost of the overall device, achieving an optimal balance between mechanical performance and weight reduction.
3Strength
If a metal material is used for the mirror supporting member to ensure structural strength, then the supporting member has sufficient mechanical strength, but the manufacturing cost increases
Solution Approach 1:
The patent changes the material parameter from metal to resin, which reduces manufacturing cost while maintaining adequate structural strength. The resin material allows for cost-effective manufacturing processes and reduces overall device cost without compromising the functional requirements of the supporting member.
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 effectively suppresses trapezoidal distortion and vignetting, enhancing image projection quality while reducing manufacturing and assembly errors, and lowering the overall cost and weight of the projector.
Implementation Method 1
a reflection mirror, a plurality of projection lenses, a projection lens supporting member to support the plurality of projection lenses
Data Source
AI summary
A projection optical device to project an image on a projection plane, includes a reflection mirror, a plurality of projection lenses, a projection lens supporting member to support the plurality of projection lenses, and a position-arrangement member provided at the projection lens supporting member to arrange the reflection mirror at a predefined position on the projection lens supporting member.