Rollable Display Panel Layout for Surface Quality and Reliability
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Solution Overview
Problem
Existing display devices face challenges in displaying images effectively while maintaining structural reliability and surface quality, particularly when using flexible display panels that are wound or unwound from a housing, and in integrating touch sensors without compromising image quality or durability.
Innovation Solution
A display device design featuring a housing with specific openings and a rotary shaft system that allows the display panel to be wound or unwound, combined with a touch sensor unit that seals an opening and is transparent to visible light, ensuring the display panel's surface quality and structural integrity are maintained.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the display panel is wound on a rotary shaft and inserted into the housing, then the display device achieves flexible form factors and portability, but the structural reliability and surface quality of the exposed display panel deteriorate
Solution Approach 1:
The display device is divided into separate functional modules: the display panel, the touch sensor unit, and the housing are separated into distinct components that can be independently manufactured and assembled. The touch sensor unit is specifically separated to seal the second opening independently from the display panel, allowing each component to be optimized for its specific function while maintaining overall structural reliability.
Solution Approach 2:
The touch sensor unit acts as an intermediary element that seals the second opening in the housing. This intermediary component protects the internal structure and maintains surface quality of the display panel while allowing the display to be viewed through the opening. The transparent touch sensor unit mediates between the need for structural sealing and the need for optical transparency.
2Adaptability or versatility
If the display panel is wound on a rotary shaft and inserted into the housing, then the display device achieves flexible form factors and portability, but the surface quality of the exposed display panel deteriorates
Solution Approach 1:
The display system is segmented into the display panel and a separate touch sensor unit that includes a second substrate. This segmentation allows the second substrate to specifically address surface quality concerns at the opening area, while the display panel maintains its flexible, wound configuration for portability.
Solution Approach 2:
The second substrate of the touch sensor unit serves as an intermediary layer that covers the second opening and protects the display panel's surface quality. This intermediary layer ensures that the exposed display area maintains high manufacturing precision and surface quality while the display remains in its flexible, wound state.
3Adaptability or versatility
If a touch sensor is integrated with the display panel, then the touch functionality is combined, but the structural reliability and surface quality of the opening area deteriorate
Solution Approach 1:
The touch sensor is segmented from the display panel into a separate touch sensor unit with its own substrates and electrodes. This segmentation allows the touch sensor unit to independently seal the second opening and maintain structural reliability, while still providing integrated touch functionality when combined with the display panel.
Solution Approach 2:
The touch sensor unit acts as an intermediary structure that provides both touch sensing functionality and structural sealing for the second opening. By separating the touch sensor from the display panel, it can serve as a mediator that protects the opening area while maintaining the ability to detect touch input.
4Adaptability or versatility
If a touch sensor is integrated with the display panel, then the touch functionality is combined, but the surface quality of the opening area deteriorates
Solution Approach 1:
The touch sensor is divided into a separate unit with distinct substrates, allowing the second substrate to specifically address surface quality requirements at the opening area. This segmentation enables independent optimization of the touch sensor unit for surface quality while maintaining integrated touch functionality.
Solution Approach 2:
The second substrate of the separated touch sensor unit serves as an intermediary layer that specifically addresses surface quality concerns at the second opening. This intermediary structure allows the touch sensor to provide both functional integration and surface quality protection without compromising manufacturing precision.
Data Source
AI summary
A display device includes a first forward roll, a second forward roll, a third forward roll, a rotary shaft in a housing and spaced apart from the third forward roll, and a display panel engaging with the rotary shaft, the first forward roll, the second forward roll, and the third forward roll to be inserted into, or retracted from, the housing, the display panel includes a main display region, retracted from the housing through a first opening to display an image, a first sub-region, extending from the first forward roll to the second forward roll, a sub-display region, extending from the second forward roll to the third forward roll and overlapping a second opening in a plan view to display an image, and a second sub-region, extending from the third forward roll to the rotary shaft and wound on an outside of the rotary shaft.