Flexible Display Disc Wheel Roller Mechanism

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Solution Overview

Problem

Existing display devices, particularly those using flexible OLED panels, face challenges in maintaining structural rigidity to prevent sagging and torsion, and require an effective driving mechanism.

Innovation Solution

A display device configuration that includes a flexible OLED panel wound around a long roller, with a disc wheel positioned adjacent to the edges of the stacked panel. The disc wheel has a larger diameter than the panel and is coupled to the roller, enhancing structural rigidity and providing a driving mechanism.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Adaptability or versatility

If a flexible display panel is wound around a roller, then the display device can be compact and flexible, but the structural rigidity is insufficient causing sagging and torsion

Engineering Contradiction:

ImproveflexibilityVSAvoidstructural rigidity

Core Design Contradiction:

Adaptability or versatilityVSStability of the object's composition

Solution Approach 1:

The disc wheel is positioned inside the space enclosed by the flexible display panel when wound around the roller. The disc wheel fits within the inner cavity formed by the panel, creating a nested structure where the rigid disc wheel provides internal support to prevent sagging and torsion while the flexible panel maintains its wraparound capability.

Inventive Principle:

Principle #7Nested doll (Nesting)

Solution Approach 2:

The disc wheel acts as an intermediary structural element between the roller and the flexible display panel. It transfers and distributes mechanical stresses, providing rigidity to the overall assembly while allowing the panel to remain flexible for winding and unwinding operations.

Inventive Principle:

Principle #24Intermediary (Mediator)

2Stability of the object's composition

If the disc wheel diameter is made larger than the display panel diameter, then structural rigidity is improved, but the device complexity increases

Engineering Contradiction:

Improvestructural rigidityVSAvoidcomponent size relationship

Core Design Contradiction:

Stability of the object's compositionVSDevice complexity

Solution Approach 1:

The disc wheel is positioned specifically at the edges of the stacked display panel where additional structural support is most needed. By concentrating the rigid structure at these critical locations rather than uniformly throughout the entire assembly, the patent achieves enhanced rigidity while minimizing overall device complexity.

Inventive Principle:

Principle #3Local quality

Data Source

PatentUS12222765B2Display device

Publication Date: 2025.02.11 LG ELECTRONICS INC

AI summary

Disclosed is a display device. The display device of the present disclosure comprises: a flexible display panel; an elongated roller on which the display panel is wound or unwound; and a disk wheel positioned adjacent to the edges of the display panel which is laminated while wound on the roller, wherein the disk wheel is coupled to the roller and passes across the axis of rotation of the roller. The diameter of the disk wheel may be larger than the diameter of the display panel wound around the roller.