Rollable Display Roller with Protrusions and Seats
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Solution Overview
Problem
Rollable display devices face challenges in preventing damage to printed circuit boards and display panels due to exposure during rolling and the generation of steps between the roller and the panel, leading to deformation and complexity in design.
Innovation Solution
A cylindrical roller with radially protruding features and recessed seats is designed to accommodate the printed circuit board, preventing steps and damage by supporting the display panel and protecting the circuitry during rolling and unrolling.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the display panel is rolled using a simple cylindrical roller, then the rolling operation is simple, but the printed circuit board is exposed to the outside requiring additional housing and increasing device complexity
Solution Approach 1:
The printed circuit board is nested within the roller structure by providing a receiving space inside the roller that accommodates the board during rolling operations, eliminating the need for separate housing and reducing overall device complexity
2Device complexity
If the display panel is rolled using a simple cylindrical roller, then the structure is simple, but the printed circuit board is exposed requiring additional housing which increases volume
Solution Approach 1:
The roller structure is merged with the printed circuit board housing function by integrating a receiving space within the roller that accommodates the board, combining two separate components into one and reducing overall device volume
3Device complexity
If a cylindrical roller is used to roll the display panel, then the rolling mechanism is simple, but steps are generated between the roller and display panel due to panel thickness causing deformation
Solution Approach 1:
The roller surface is modified with local features (protrusions and recesses) that correspond to the thickness profile of the display panel, creating localized variations in the roller surface that prevent step formation and panel deformation while maintaining overall structural simplicity
Data Source
AI summary
The present disclosure provides a rollable display device that can prevent a step between a roller and a display panel and can prevent damage to a printed circuit board and an IC etc. for driving and controlling the display panel, by forming a protrusion radially protruding on the outer side of the roller formed in a cylindrical shape for rolling the display panel and by forming a seat radially recessed on the outer side.