Mesh Display Structure for Uniform Stretching

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Solution Overview

Problem

Flexible display apparatuses experience uneven resolution and significant image distortion when stretched due to varying pixel spacing in different directions, leading to a lack of uniformity in display quality.

Innovation Solution

A mesh distribution structure comprising interconnected display units and connectors that expand synchronously in both directions when stretched, maintaining even resolution by forming a mesh cell structure with alternating dumb-bell-shaped cells and using axially symmetric connectors with varying cross-sectional widths to distribute stress evenly.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Area of stationary object

If the display apparatus is stretched in one direction, then the display area is expanded, but the resolution becomes uneven and image distortion occurs

Engineering Contradiction:

Improvedisplay areaVSAvoidresolution uniformity

Core Design Contradiction:

Area of stationary objectVSManufacturing precision

Solution Approach 1:

The display apparatus is divided into multiple display units arranged in a mesh pattern, with connectors forming a grid structure between them. This segmentation allows each unit to move independently during stretching, maintaining uniform pixel spacing and preventing resolution degradation across the expanded display area.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The mesh distribution structure introduces a two-dimensional expansion mechanism where stretching in one direction simultaneously expands the display in both directions. This dimensional approach ensures that pixel spacing remains uniform across the entire display area, avoiding the resolution unevenness that would occur with unidirectional stretching of a rigid structure.

Inventive Principle:

Principle #17Another dimension (Dimensionality change)

2Strength

If connectors are made rigid to maintain structural stability, then structural strength is improved, but connector breakage occurs when stretched

Engineering Contradiction:

Improvestructural strengthVSAvoidconnector durability

Core Design Contradiction:

StrengthVSReliability

Solution Approach 1:

The connectors are designed with flexible characteristics, allowing them to bend and deform elastically when the display apparatus is stretched. This flexibility enables the connectors to accommodate tensile forces without breaking, while still maintaining sufficient structural strength to hold the display units together during normal operation.

Inventive Principle:

Principle #30Flexible shells and thin films

Solution Approach 2:

The connector structure transitions from a static rigid design to a dynamic flexible design that can adapt its shape during stretching. The connectors are configured to bend at specific locations, allowing the overall structure to expand while distributing mechanical stress away from critical connection points, thereby preventing breakage.

Inventive Principle:

Principle #15Dynamics

3Adaptability or versatility

If pixel spacing varies in different directions, then stretching is enabled, but image distortion occurs

Engineering Contradiction:

ImprovestretchabilityVSAvoidimage quality

Core Design Contradiction:

Adaptability or versatilityVSManufacturing precision

Solution Approach 1:

The mesh distribution structure employs an asymmetric connector design where connectors in different orientations have different geometries. Specifically, connectors arranged in the first direction have different shapes compared to connectors in the second direction, allowing each to expand appropriately in its respective direction while maintaining uniform pixel spacing and preventing image distortion.

Inventive Principle:

Principle #4Asymmetry

Solution Approach 2:

Different regions of the connector structure have locally optimized properties. Connectors are designed with varying cross-sectional widths and curvature radii at different positions, allowing each local region to contribute to the overall uniform expansion. This local quality optimization ensures that pixel spacing remains consistent across the entire display area during stretching.

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

The solution ensures that the display apparatus maintains relatively even resolution and reduces image distortion when stretched, with the mesh distribution structure contracting uniformly upon removal of tensile force, preserving image quality and preventing connector breakage.

Implementation Method 1

when the mesh distribution structure is stretched in a first direction, the mesh distribution structure is configured to expand in a second direction perpendicular to the first direction

Methodology Applied

Scientific EffectPoisson's Effect: Poisson's Effect

Implementation Method 2

using axially symmetric connectors with varying cross-sectional widths to distribute stress evenly

Methodology Applied

Scientific EffectStress distribution:

Data Source

PatentUS11502152B2Display apparatus and preparation method thereof

Publication Date: 2022.11.15 BEIJING BOE TECH DEV CO LTD

AI summary

The present disclosure relates to a display apparatus. The display apparatus may include a plurality of display units, each of the plurality of display units including at least one pixel, and a plurality of connectors that connect the plurality of display units to one another. The plurality of connectors and the plurality of display units may form a mesh distribution structure and, when the mesh distribution structure is stretched in a first direction, the mesh distribution structure may be configured to expand in a second direction perpendicular to the first direction.