Rollable Flexible Display Device with Dynamic Touch Region Control
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Solution Overview
Problem
Existing flexible display devices lack a convenient and portable mechanism to accommodate and deploy a flexible display unit, limiting user interaction and functionality by not allowing seamless adjustment of the display region size and activation of touch inputs.
Innovation Solution
A flexible display device with a polygonal column body, rotary members, conductive members, and a controller that allows the flexible display unit to be rolled in or out of the body, enabling dynamic adjustment of the exposed region and activation based on touch inputs, using a touch sensing layer and conductive members to transmit signals for controlling the active and inactive regions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If the flexible display unit is accommodated inside the body part, then the device achieves compact storage and portability, but the display region size is limited and cannot be fully utilized
Solution Approach 1:
The flexible display unit is designed to dynamically change its configuration between a rolled-up state for compact storage and an unrolled state for expanded display. The display can be partially or fully unrolled from the body part based on user needs, allowing the display region size to vary while maintaining compact storage when not in use.
2Area of moving object
If the flexible display unit is unrolled to increase display region, then the display area is expanded, but the device complexity increases due to additional structural components
Solution Approach 1:
The flexible display unit is nested within the body part, with the display rolled up and stored inside the body part when not in use. The body part serves as a housing that contains the rolled-up display, eliminating the need for separate structural components to support the display expansion mechanism.
Solution Approach 2:
The body part serves multiple functions: it acts as the housing for the device, provides a storage compartment for the rolled-up display, and serves as the structural framework for the device. This multi-functionality reduces the need for additional specialized components.
3Adaptability or versatility
If the flexible display unit is made deformable to be rollable, then the device achieves flexibility and portability, but the manufacturing precision requirements increase
Solution Approach 1:
The flexible display unit utilizes flexible substrates and thin-film structures that inherently possess flexibility and can be deformed for rolling. These flexible materials are designed to withstand repeated bending and rolling cycles without compromising structural integrity or display functionality.
Solution Approach 2:
The body part is designed with sufficient internal space and appropriate structural support to accommodate the rolled-up display without applying excessive stress or deformation during storage. This preliminary design consideration prevents excessive stress concentration that would require ultra-precise manufacturing tolerances.
4Adaptability or versatility
If the externally-exposed region is set as active region, then the display functionality is enhanced, but the control complexity increases due to touch input detection requirements
Solution Approach 1:
The touch sensing layer is integrated directly into the flexible display unit, allowing the display to detect touch inputs automatically based on its own configuration state. The system automatically determines which regions are active or inactive based on the rolled-up or unrolled state, eliminating the need for separate complex control mechanisms.
Data Source
AI summary
The present invention relates to a flexible display device and a control method therefor. The flexible display device comprises: a body part having a polygonal column shape; a flexible display unit which is configured to be inserted into the body part or withdrawn from the body part, while being deformed by an external force; a rotary member which is rotatably installed inside the body part and makes the flexible display unit become rolled or unrolled along the outer surface; a conductive member which is installed and fixed to the bottom surface portion inside the body part and contacts the flexible display unit to apply a touch input; and a control unit which sets an externally exposed region of the flexible display unit as an active region on the basis of the touch input applied to the flexible display unit.