Articulated Panel Support for Bendable Display Flatness

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Solution Overview

Problem

Display devices, particularly OLEDs, face challenges in maintaining structural support during bending and folding operations, leading to potential uneven surfaces and reduced durability.

Innovation Solution

A display device design featuring a panel support portion with joint members and rotational angle limiting members that allow the display panel to be firmly supported, ensuring it remains flat in designated areas while allowing controlled bending and folding, using a configuration of joint members and connecting members to manage curvature and prevent excessive rotation.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Adaptability or versatility

If the display panel is made flexible to enable bending and folding operations, then adaptability and versatility are improved, but structural integrity and flatness are compromised

Engineering Contradiction:
Improvebending and folding capabilityVSAvoidpanel flatness and structural integrity
Core Design Contradiction:
Adaptability or versatilityVSStability of the object's composition

Solution Approach 1:

The support structure is divided into multiple link pieces connected by link pins, forming a segmented mechanism that can bend at specific joints while maintaining overall structural integrity. This segmentation allows controlled deformation without compromising the entire panel's stability.

Inventive Principle:
Principle #1Segmentation

Solution Approach 2:

The support structure transitions from a static rigid frame to a dynamic articulated mechanism with rotational joints. The link pieces can rotate relative to each other around link pins, enabling the structure to adapt its shape dynamically while maintaining support functionality throughout bending and folding operations.

Inventive Principle:
Principle #15Dynamics

2Stability of the object's composition

If rigid support structures are used to maintain panel flatness, then structural integrity is improved, but flexibility and bending capability are reduced

Engineering Contradiction:
Improvepanel flatnessVSAvoidbending capability
Core Design Contradiction:
Stability of the object's compositionVSAdaptability or versatility

Solution Approach 1:

The support structure incorporates rotational joints at the link pins, transforming rigid connections into dynamic articulations. This allows the structure to maintain rigidity when flatness is needed while enabling controlled bending when adaptability is required, resolving the contradiction between structural stability and flexibility.

Inventive Principle:
Principle #15Dynamics

Solution Approach 2:

The support structure uses thin link pieces that can flex and rotate at joints, providing a lightweight yet effective support mechanism. These thin components maintain panel flatness in extended positions while enabling bending capability through their articulated connections.

Inventive Principle:
Principle #30Flexible shells and thin films

3Strength

If multiple link pieces and joint members are added to support the bending area, then structural integrity during folding is improved, but device complexity increases

Engineering Contradiction:
Improvesupport strength during bendingVSAvoidnumber of joint members and connecting members
Core Design Contradiction:
StrengthVSDevice complexity

Solution Approach 1:

Each link pin serves multiple functions: it acts as a rotational joint enabling bending, provides a connection point between link pieces, and serves as a pivot for the support structure's articulation. This multi-functionality reduces the need for separate components, managing complexity while maintaining support strength.

Inventive Principle:
Principle #6Universality (Multi-functionality)

Solution Approach 2:

The link pieces and link pins are integrated into a unified articulated mechanism where the connection elements serve both structural and functional roles. By merging the support function with the bending mechanism, the design achieves adequate support strength without adding excessive separate components.

Inventive Principle:
Principle #5Merging (Combining)

Data Source

PatentEP3270259B1Display device
Publication Date: 2020.06.17 SAMSUNG DISPLAY CO LTD
  • EP3270259B1 patent drawingFigure 1
  • EP3270259B1 patent drawingFigure 2
  • EP3270259B1 patent drawingFigure 3

AI summary

A display device includes a display panel (PNL) including a bending area (BA) that is bendable along an axis (x) extending in a first direction, and a panel support portion (PNL-SU) that supports the display panel (PNL) in the bending area (BA). The panel support portion (PNL-SU) includes a plurality of joint members (110, 130), a plurality of rotational angle limiting members (310a, 310b, 310c, 310d, 330a, 330b, 330c, 330d), and a plurality of connecting members (700). The joint members (110, 130) are sequentially arranged and support the display panel (PNL). Each joint member (110, 130) is rotatable about two rotation axes (AX-1, AX-2, AX-3, AX-4). The rotational angle limiting members (310a, 310b, 310c, 310d, 330a, 330b, 330c, 330d) are coupled to the joint members (110, 130) and limit rotational angles of the joint members (110, 130). Each connecting member (700) is coupled to a pair of the rotational angle limiting members (310a, 310b, 310c, 310d, 330a, 330b, 330c, 330d) disposed at a pair of adjacent joint members (110, 130). The rotational angle limiting members included in the pair of rotational angle limiting members (310a, 330b) contact each other and are coupled to an inner portion of the corresponding connecting member (700).