Flexible Substrate Deformation Layout for Touch Sensing Integrity
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Solution Overview
Problem
Flexible electronic devices face challenges in maintaining user experience and reliability due to the damage of sensing units during deformation, as existing designs often result in either excessive stress or inadequate deformation, leading to poor sensing effectiveness.
Innovation Solution
The design incorporates a flexible substrate with a deformation portion and light-emitting elements, where the ratio of the deformation area to the sensing unit area is optimized between 53.08 and 1000000, ensuring the sensing units are protected from damage while providing effective sensing capabilities during deformation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the flexible substrate is deformed to enable flexibility, then the device can be bent and folded, but the sensing units may be damaged due to excessive stress
Solution Approach 1:
The patent applies local quality by creating a deformation portion with specific structural characteristics (different from other portions of the flexible substrate) that is localized at specific regions where bending is expected. This deformation portion has optimized thickness and material properties that allow it to deform without damaging the sensing units, while other portions of the substrate maintain their original structural integrity.
Solution Approach 2:
The patent implements beforehand cushioning by designing a deformation portion that absorbs and dissipates stress before it can reach the sensing units. This deformation portion acts as a protective buffer that deforms in advance to cushion the impact of bending forces, preventing stress transmission to the sensing units and maintaining their integrity during flexing operations.
2Reliability
If the deformation area is increased to protect sensing units, then sensing unit damage is reduced, but the touch sensing accuracy may deteriorate
Solution Approach 1:
The patent applies parameter changes by optimizing the size ratio between the deformation portion and sensing units within a specific range (53.08 to 1000000). This parameter optimization ensures that the deformation portion is large enough to protect sensing units from stress damage, while simultaneously being controlled to maintain sufficient touch sensing accuracy. The specific ratio range represents a balanced solution that resolves the contradiction between protection and precision.
3Reliability
If the ratio of deformation area to sensing unit area is optimized, then sensing unit damage is prevented, but device complexity increases
Solution Approach 1:
The patent applies segmentation by dividing the flexible substrate into distinct functional regions: a deformation portion designed for stress absorption and protection, and other portions for normal structural support and sensing functions. This segmentation allows each region to be optimized independently for its specific function, simplifying the overall design by clearly defining the role and characteristics of each portion rather than requiring complex integrated solutions.
Data Source
AI summary
A flexible electronic device is disclosed. The flexible electronic device includes a flexible substrate and a plurality of light-emitting elements. The flexible substrate includes a deformation portion. The plurality of light-emitting elements are disposed on the deformation portion of the flexible substrate. In a top view, a ratio of an area of the deformation portion to an area of one of the plurality of light-emitting elements is greater than or equal to 53.08 and less than or equal to 1000000.