Rollable Display Roller Step Adjustment Mechanism

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Solution Overview

Problem

Existing rollable display devices face challenges in preventing damage to the display module and adjusting the size of the step portion of the roller to accommodate varying thicknesses of the display module.

Innovation Solution

The display device incorporates a first roller with a cavity and a step adjustment part that allows for the adjustment of the step between the end surfaces of the roller through a rotary motion, ensuring the display module is securely connected and wound around the roller without damage.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If the display module is wound around a fixed roller structure, then the device structure is simple, but the display module may be damaged due to fixed step size not accommodating varying thicknesses

Engineering Contradiction:

Improvedisplay module damage preventionVSAvoidroller structure complexity

Core Design Contradiction:

ReliabilityVSDevice complexity

Solution Approach 1:

The roller structure is transformed from a fixed configuration to a dynamic adjustable one. The step portion of the roller can be adjusted in size to accommodate different display module thicknesses, allowing the system to adapt to varying conditions while preventing damage through proper fit.

Inventive Principle:

Principle #15Dynamics

Solution Approach 2:

The physical parameter of the roller's step portion size is made variable. By changing the step size parameter to match the thickness of different display modules, the system achieves both reliability in preventing damage and flexibility in accommodating various configurations.

Inventive Principle:

Principle #35Parameter changes

2Adaptability or versatility

If the roller step portion size is fixed, then the manufacturing process is simple, but the device cannot accommodate varying display module thicknesses

Engineering Contradiction:

Improvedisplay module thickness accommodationVSAvoidroller manufacturing complexity

Core Design Contradiction:

Adaptability or versatilityVSEase of manufacture

Solution Approach 1:

The roller's step portion is designed to be adjustable rather than fixed, enabling the device to adapt to different display module thicknesses. This dynamic design allows a single roller to serve multiple thickness requirements without needing multiple specialized rollers.

Inventive Principle:

Principle #15Dynamics

Solution Approach 2:

The adjustable roller structure serves multiple functions by accommodating different display module thicknesses with a single component design. This multi-functionality eliminates the need for separate rollers for different thicknesses, maintaining ease of manufacture while achieving versatility.

Inventive Principle:

Principle #6Universality (Multi-functionality)

3Strength

If the display module is connected to the roller outer surface with a step, then the connection is secure, but the display module is prone to damage at the step location

Engineering Contradiction:

Improvedisplay module connection strengthVSAvoiddisplay module damage at step

Core Design Contradiction:

StrengthVSObject-affected harmful factors

Solution Approach 1:

The harmful step portion is extracted from the outer surface of the roller where it contacts the display module. By removing the step from the outer circumferential surface, the patent eliminates the stress concentration point that causes damage while maintaining connection strength through alternative means.

Inventive Principle:

Principle #2Taking out (Extraction)

Solution Approach 2:

The potential harm of the step portion causing damage is converted into a benefit by making the step adjustable and removable. The design allows the step to be positioned or sized in a way that maintains secure connection while eliminating damage-prone locations, transforming a harmful feature into a controllable design parameter.

Inventive Principle:

Principle #22Blessing in disguise (Convert harm into benefit)

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 effectively prevents damage to the display module by ensuring it is not disposed on the roller's outer surface with a step, and allows for adjustable step sizes to accommodate different display module thicknesses, enhancing the device's versatility and durability.

Implementation Method 1

a step adjustment part that is disposed in the cavity and that adjusts a step between the one end surface and the opposite end surface by a rotary motion

Methodology Applied

Scientific EffectRotary motion:

Data Source

PatentUS20250028362A1Display device

Publication Date: 2025.01.23 SAMSUNG DISPLAY CO LTD

AI summary

A display device includes a first roller in which a cavity extending in a first direction is defined and including an end surface and an opposite end surface facing each other at an incision extending in the first direction, a step adjustment part that is disposed in the cavity and that adjusts a step between the end surface and the opposite end surface by a rotary motion, and a display module connected to the first roller and wound around an outer circumferential surface of the first roller.