Rollable Display Panel Guide for Crack Prevention
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Solution Overview
Problem
As smartphones and tablets with larger screens become more popular, the portability of display devices is compromised, leading to excessive stress on the display panel when rolled, which can result in cracks due to perpendicular bending.
Innovation Solution
A rollable display device featuring a flexible display panel rolled around a cylindrical roller with an inclined penetration part and elastically deformable guides that maintain the panel at a predetermined angle, preventing excessive bending and stress.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the display panel is rolled around the roller, then portability is improved, but stress on the display panel increases causing cracks
Solution Approach 1:
The guide structure acts as an intermediary element between the display panel and the roller. It controls the rolling process by guiding the panel to maintain a predetermined angle relative to the roller's outer surface, preventing direct perpendicular contact that would cause cracking. The guide includes a guide groove and guide surface that mediate the interaction forces during rolling and unrolling operations.
Solution Approach 2:
The invention changes the angular parameter of the display panel during rolling by maintaining it at a predetermined angle rather than allowing perpendicular bending. This parameter change from 90 degrees to a controlled angle reduces the stress concentration on the display panel, enabling portable rolling functionality while preserving panel integrity.
2Ease of operation
If the penetration part is inclined, then the display panel can penetrate through the roller, but the panel may bend excessively
Solution Approach 1:
The guide structure serves as a mediator that compensates for the inclined penetration part's potential to cause excessive bending. By providing a controlled guide groove and surface, it ensures the panel transitions smoothly through the inclined penetration without uncontrolled bending, maintaining both penetrability and shape stability.
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 prevents the generation of cracks in the display panel by maintaining it at a stable, predetermined angle during rolling and unrolling, ensuring continuous functionality and portability.
Implementation Method 1
The first guide may include an elastically deformable material
Data Source
AI summary
A rollable display device, including a flexible display panel; a roller having a cylindrical shape, one end of the flexible display panel being fixed to the roller and rolled around the roller, the roller including a penetration part, the penetration part being inclined with respect to a circumferential surface of the roller, the flexible display panel penetrating through the penetration part; and a first guide at a portion adjacent to the penetration part on the circumferential surface of the roller, the first guide guiding the flexible display panel penetrating through the penetration part to be adjacent to an outer surface of the roller.