Strain-Relieved Screen Mounting Patches for Rolling Without Deformation

Solution Overview

Problem

Current projection screen substrates face challenges in mechanical functionality and installation due to increased optical requirements, particularly when rolled onto a core, leading to strain and potential deformation, which complicates handling and tensioning.

Innovation Solution

The use of strain-relieved mounting patches with notches or slits that reduce strain on the screen when rolled, maintaining in-plane rigidity and distributing mechanical loads evenly across the substrate, thereby minimizing stress and deformation.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Ease of operation

If the screen is rolled onto a core for shipping and installation, then ease of handling is improved, but strain and potential deformation of the screen substrate occur

Engineering Contradiction:

Improveease of handlingVSAvoidscreen substrate deformation

Core Design Contradiction:

Ease of operationVSReliability

Solution Approach 1:

The mounting patch is segmented by introducing notches or slits that divide the continuous material into sections. This segmentation allows the patch to flex and conform to the curved surface of the rolling core while maintaining attachment integrity, thereby enabling easy handling during shipping without causing screen substrate deformation.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The mounting patch undergoes parameter changes in its structural configuration by incorporating notches or slits that modify its mechanical properties. These changes allow the patch to transition from a rigid state during mounting to a more flexible state during rolling, reducing strain on the screen substrate while maintaining attachment strength.

Inventive Principle:

Principle #35Parameter changes

2Stability of the object's composition

If mounting patches are made rigid to maintain in-plane rigidity, then mounting stability is improved, but strain relief during rolling is reduced

Engineering Contradiction:

Improvemounting stabilityVSAvoidstrain relief during rolling

Core Design Contradiction:

Stability of the object's compositionVSEase of operation

Solution Approach 1:

The mounting patch is segmented by introducing notches or slits that divide the continuous material into sections. This segmentation allows the patch to flex and conform to the curved surface of the rolling core while maintaining attachment integrity, thereby enabling easy handling during shipping without causing screen substrate deformation.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

Different regions of the mounting patch have different mechanical properties. The areas with notches or slits provide flexibility for strain relief during rolling, while the overall patch structure maintains sufficient in-plane rigidity for stable mounting. This local variation in quality allows the patch to simultaneously achieve both mounting stability and strain relief capability.

Inventive Principle:

Principle #3Local quality

3Strength

If the mounting patch is made thicker to increase stiffness, then in-plane rigidity is improved, but bending flexibility is reduced

Engineering Contradiction:

Improvein-plane rigidityVSAvoidbending flexibility

Core Design Contradiction:

StrengthVSEase of operation

Solution Approach 1:

The mounting patch is segmented by introducing notches or slits that divide the continuous material into sections. This segmentation allows the patch to flex and conform to the curved surface of the rolling core while maintaining attachment integrity, thereby enabling easy handling during shipping without causing screen substrate deformation.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The mounting patch utilizes a thin film structure with strategic notches or slits that provide flexibility where needed. This allows the patch to bend during rolling operations while maintaining sufficient in-plane rigidity for stable mounting, effectively combining the properties of thin flexible films with structural strength.

Inventive Principle:

Principle #30Flexible shells and thin films

Data Source

PatentUS10254637B2Strain relieved mounting method and apparatus for screen material

Publication Date: 2019.04.09 REALD INC

AI summary

A method of mounting screen material may include a screen mounted to a frame at multiple mounting points. One embodiment may include mounting patches attached along the perimeter of the screen. These mounting patches may be strain relieved in order to enable rolling the screen without sacrificing the in-plane rigidity of the patches when the screen is mounted to a frame. Stated differently, the strain relieved patches may reduce the strain on the screen in the circumstance the screen is rolled onto a core. The mounting patches may be strain relieved by locating notches or slits in the mounting patch.