Rollable Display Tape Spring Tension Control
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Solution Overview
Problem
Conventional rollable display devices face challenges in maintaining consistent tension during winding and unwinding, leading to excessive tension on the display panel, which can cause damage.
Innovation Solution
A design incorporating a tape spring connected to the display panel, a first roller for winding/unwinding the panel, a second roller for winding/unwinding the tape spring, and a timing belt synchronizing the rotation of both rollers to maintain constant tension, minimizing excessive tension on the display panel.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a single roller is used to wind/unwind the display panel, then the device structure is simple, but excessive tension is generated on the display panel
Solution Approach 1:
The single roller is divided into two separate rollers: a first roller for winding/unwinding the display panel and a second roller for winding/unwinding the tape spring. This segmentation allows independent control of tension application, preventing excessive tension on the display panel while maintaining structural simplicity.
2Ease of operation
If tension is applied to lift the display panel, then the panel can be positioned, but inconsistent tension causes excessive force on the panel
Solution Approach 1:
A tape spring is introduced as an intermediary element between the second roller and the display panel. The tape spring translates the rotational motion of the second roller into controlled linear tension, providing smooth and consistent force application that prevents excessive tension on the panel while enabling precise positioning.
3Volume of moving object
If the display device is made rollable, then volume and weight are reduced, but maintaining constant tension during winding/unwinding becomes difficult
Solution Approach 1:
The system employs dynamic coordination between the first and second rollers through synchronized rotation. As the display panel is wound or unwound, the rollers adjust their rotation to maintain constant tension in the tape spring, ensuring stable force application throughout the entire range of motion while preserving the rollable form factor.
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 ensures that the tension of the spring member is consistently maintained during winding and unwinding, reducing the risk of damage to the display panel and allowing for efficient operation of both inner and outer type display devices.
Implementation Method 1
a tape spring which is connected to the display panel to lift the display panel
Implementation Method 2
a timing belt which rotates the second roller in the same direction as the first roller when the first roller is wound or unwound
Data Source
AI summary
A display device includes a display panel in which an image is displayed; a tape spring which is connected to the display panel to lift the display panel; a first roller on which the display panel is wound or unwound; a second roller on which the tape spring is wound or unwound; and a timing belt which rotates the second roller in the same direction as the first roller when the first roller is wound or unwound.