Adjustable Reflective Mirror Module for Projection Apparatus

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Solution Overview

Problem

Conventional reflective mirror modules in projection apparatuses require additional features like threaded holes and position ribs on the optical engine housing, complicating the manufacturing process and requiring time-consuming adjustments to correct angle errors, which can lead to the blue band phenomenon.

Innovation Solution

A reflective mirror module with a fixing support, an adjusting leaf spring, and screws that pass through through holes and guiding openings, allowing precise adjustment without the need for threaded holes and position ribs on the housing, using the leaf spring's elasticity to maintain distance and facilitate angle adjustments.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Ease of operation

If conventional adjustable reflective mirror module is installed on optical engine housing, then the reflective mirror angle can be adjusted, but threaded holes and position ribs must be added to the housing which complicates the molding process

Engineering Contradiction:

Improveadjustability of reflective mirror angleVSAvoidmolding process complexity

Core Design Contradiction:

Ease of operationVSEase of manufacture

Solution Approach 1:

The invention divides the mounting system into two separate parts: the optical engine housing and the reflective mirror module. The module includes a fixing support with threaded holes that can be independently manufactured and then assembled to the housing through through-holes, avoiding the need to incorporate threading features directly into the housing mold.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The fixing support acts as an intermediary component between the housing and the reflective mirror. It provides the threaded holes and positioning features needed for adjustment while being mounted to the simple housing structure through through-holes, thus mediating between the simple housing and the adjustable mirror requirements.

Inventive Principle:

Principle #24Intermediary (Mediator)

2Manufacturing precision

If mylar is attached between housing and reflective mirror to correct angle errors, then blue band phenomenon is solved, but much time and cost are required

Engineering Contradiction:

Improvereflective mirror angle precisionVSAvoidadjustment time

Core Design Contradiction:

Manufacturing precisionVSLoss of time

Solution Approach 1:

The invention transforms the static, fixed-angle mounting into a dynamic, adjustable system. The reflective mirror can be positioned and angled precisely using adjusting screws that interact with the fixing support, allowing for real-time correction of angle errors without requiring time-consuming mylar attachment processes.

Inventive Principle:

Principle #15Dynamics

Solution Approach 2:

The invention replaces the chemical/adhesive-based mylar attachment system with a mechanical adjustment system using adjusting screws and threaded holes. This mechanical system allows for precise angular adjustment and is both faster and more reversible than the mylar method.

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

3Ease of manufacture

If reflective mirror is fixed on housing inner wall, then assembly is simple, but angle errors cause blue band phenomenon and cannot be adjusted

Engineering Contradiction:

Improveassembly simplicityVSAvoidreflective mirror angle accuracy

Core Design Contradiction:

Ease of manufactureVSManufacturing precision

Solution Approach 1:

Inventive Principle:

Principle #15Dynamics

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 solution enables precise and time-saving assembly and adjustment of the reflective mirror module, preventing the blue band phenomenon while simplifying the manufacturing process by eliminating the need for additional housing features.

Implementation Method 1

an adjusting leaf spring, and a plurality of adjusting screws. The fixing support has a plurality of threaded holes, and the positions of the threaded holes are corresponding to the positions of the through holes. The reflective mirror is disposed on the fixing support, and the adjusting leaf spring is disposed between the fixing support and the housing for maintaining a distance existing between the fixing support and the housing

Methodology Applied

Scientific EffectElasticity: Elasticity

Data Source

PatentUS7901090B2Adjustable reflective mirror module and projection apparatus using the same

Publication Date: 2011.03.08 CORETRONIC CORPORATION

AI summary

A reflective mirror module for being fixed on a housing having a plurality of through holes is provided. The reflective mirror module includes a fixing support, a reflective mirror, a leaf spring, and a plurality of adjusting screws. The fixing support has a plurality of threaded holes. The reflective mirror is disposed on the fixing support, and the leaf spring is disposed between the fixing support and the housing. Moreover, the leaf spring has a plurality of guiding openings, and the positions of the guiding openings and the threaded holes are corresponding to the positions of the through holes. The adjusting screws pass through the through holes and the guiding openings, and are secured in the threaded holes of the fixing support. Through the adjustment of the adjusting screws, the position of the reflective mirror is adjusted precisely. Additionally, a projection apparatus using the reflective mirror module is provided.