Curved Intermediate Member Absorbs Dimming Member Deformation

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Solution Overview

Problem

High-rigidity dimming members in head-mounted displays and glasses can deform due to the force of returning to their original shape, leading to performance deterioration.

Innovation Solution

A head-mounted display configuration that includes an optical member, an intermediate member with a curvature, and a dimming member arranged via a predetermined gap with respect to the optical member and mounted on the intermediate member, which helps absorb external forces and prevent deformation.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If a dimming member having high rigidity is used to control transmittance, then the transmittance control performance is improved, but the dimming member may be deformed from its original shape due to force of returning to original shape, causing performance deterioration

Engineering Contradiction:

Improvetransmittance control performanceVSAvoidshape stability

Core Design Contradiction:

ReliabilityVSStability of the object's composition

Solution Approach 1:

An intermediate member is introduced between the optical member and the dimming member. This intermediate member has flexibility to absorb deformation forces while maintaining the curved shape of the dimming member. The intermediate member acts as a buffer that prevents direct transmission of stress to the optical member, thus resolving the contradiction between maintaining high rigidity for transmittance control and preventing shape deformation.

Inventive Principle:

Principle #24Intermediary (Mediator)

Solution Approach 2:

The structure is divided into separate functional components: the optical member, the intermediate member, and the dimming member. By segmenting the system, each component can be optimized independently - the dimming member for transmittance control and the intermediate member for mechanical flexibility - thereby resolving the contradiction between rigidity requirements and deformation prevention.

Inventive Principle:

Principle #1Segmentation

2Stability of the object's composition

If a curved dimming member is provided to maintain shape, then the shape stability is improved, but the dimming member may still be deformed due to force of returning to original shape, causing performance deterioration

Engineering Contradiction:

Improveshape stabilityVSAvoidperformance consistency

Core Design Contradiction:

Stability of the object's compositionVSReliability

Solution Approach 1:

The intermediate member serves as a mediator that supports the curved shape of the dimming member while absorbing the forces that would cause deformation. This allows the dimming member to maintain its curved configuration for shape stability without suffering from harmful elastic recovery forces, thus ensuring consistent performance.

Inventive Principle:

Principle #24Intermediary (Mediator)

Solution Approach 2:

The intermediate member is designed in advance to provide mechanical cushioning and stress absorption. This pre-engineered buffering capacity prevents sudden deformations from affecting the optical member, ensuring long-term performance consistency by anticipating and mitigating potential deformation forces.

Inventive Principle:

Principle #11Beforehand cushioning (Prior cushioning)

3Device complexity

If the dimming member is arranged close to the optical member to reduce gap, then the device compactness is improved, but the risk of interference and displacement increases

Engineering Contradiction:

Improvestructure compactnessVSAvoidinterference risk

Core Design Contradiction:

Device complexityVSObject-affected harmful factors

Solution Approach 1:

The intermediate member acts as a spaced-apart mechanism that maintains a controlled gap between the optical member and the dimming member. This intermediate structure prevents direct contact and potential interference while still allowing the components to be arranged in a compact configuration, thus resolving the contradiction between compactness and interference prevention.

Inventive Principle:

Principle #24Intermediary (Mediator)

Solution Approach 2:

The intermediate member provides localized spacing and protection in the critical gap region between the optical member and dimming member. By concentrating the spacing function at this specific location, the overall device can remain compact while preventing interference in the important interaction zone.

Inventive Principle:

Principle #3Local quality

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 configuration effectively prevents the deformation of the optical member and maintains display performance by distributing external forces away from the optical member, reducing the risk of displacement and interference.

Implementation Method 1

an intermediate member extended with a curvature in a predetermined direction... effectively prevents the deformation of the optical member and maintains display performance by distributing external forces away from the optical member

Methodology Applied

Scientific EffectElastic deformation: Elasticity

Data Source

PatentUS12055720B2Head-mounted display and glasses

Publication Date: 2024.08.06 META PLATFORMS INC

AI summary

A head-mounted display includes: an optical member that provides an image; an intermediate member extended with a curvature in a predetermined direction; and a dimming member arranged via a predetermined gap with respect to the optical member and mounted on the intermediate member in such a manner as to have a curvature in the predetermined direction.