Rollable Display Panel Tension Control With Rotatable Elastic Member
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Solution Overview
Problem
Existing display devices face issues such as loosening of cover glass, damage to the display panel due to stress from elastic members, excessive tensile stress, and reduced display quality when sliding or being accommodated in a housing unit.
Innovation Solution
A display device design incorporating a display panel, a roller, a rotary shaft, and an elastic member that allows for rotatable connection, with a motor controlling the rotation of the rotary shaft to manage stress and minimize slip differences, ensuring consistent tensile stress and maintaining display quality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the elastic member is rigidly connected to the roller and rotary shaft, then the tensile stress is consistently transmitted, but excessive tensile stress damages the display panel
Solution Approach 1:
The elastic member is configured to be rotatably connected to both the roller and the rotary shaft, allowing dynamic rotation instead of rigid connection. This enables the elastic member to adjust its orientation and reduce excessive tensile stress while maintaining connection stability during sliding operations.
2Productivity
If the display panel is repeatedly slid in and out, then the display device is reusable, but the cover glass loosens from the display panel
Solution Approach 1:
The rotatable connection structure of the elastic member serves as a cushioning mechanism that absorbs and mitigates stress before it can cause damage. By allowing rotation, the system preemptively reduces stress concentration that would otherwise lead to cover glass loosening during repeated sliding operations.
3Manufacturing precision
If the elastic member applies strong restoring force, then the display panel returns to position accurately, but excessive stress damages the flexible film and printed circuit board
Solution Approach 1:
The rotatable connection allows the elastic member to dynamically adjust its force application angle, converting some linear tensile stress into rotational motion. This reduces the harmful tensile stress on the display panel while maintaining the restoring force needed for accurate positioning.
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
Minimizes the separation of cover glass from the display panel, reduces damage to the flexible film and printed circuit board, and maintains the display panel's flatness while reducing slip differences and stress, thereby enhancing the reliability and display quality.
Implementation Method 1
an elastic member which is disposed in the roller, has one end connected to the roller and the other end connected to the rotary shaft
Data Source
AI summary
A display device can include a display panel, a roller which guides sliding of the display panel, a plurality of flexible films connected to one end of the display panel, and a mandrel which supports the display panel and the plurality of flexible films. Also, the display device further includes a printed circuit board connected to the plurality of flexible films, in which the printed circuit board is fixed to the mandrel by a fastening unit.