Organic-Inorganic Insulating Layer for Foldable Display Impact Resistance
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Solution Overview
Problem
Foldable display devices face challenges in maintaining folding characteristics and preventing damage to the insulating layer due to external impacts, particularly in configurations where the insulating layer is prone to cracking or deformation.
Innovation Solution
A display device design incorporating a sensing electrode with a first and second insulating layer, where one layer is organic and the other is inorganic, and a light blocking pattern that covers the step difference between the layers, enhancing the folding characteristics and impact resistance by using a combination of organic and inorganic materials to absorb and distribute external forces effectively.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a single-layer insulating structure is used in the input sensor, then the device complexity is reduced, but the folding characteristics and impact resistance deteriorate
Solution Approach 1:
The patent applies composite materials by combining organic and inorganic insulating layers in the input sensor structure. The organic insulating layer provides flexibility for folding, while the inorganic insulating layer provides rigidity and impact resistance. This composite structure resolves the contradiction between device complexity and reliability by maintaining a relatively simple overall structure while achieving superior folding characteristics and impact resistance through material composition.
2Reliability
If the insulating layer is made thicker to improve impact resistance, then the reliability improves, but the folding characteristics deteriorate due to increased rigidity
Solution Approach 1:
The patent uses composite materials with different mechanical properties - the organic insulating layer provides flexibility and bendability, while the inorganic insulating layer provides rigidity and impact resistance. This allows the structure to achieve high impact resistance without compromising folding characteristics, as each material layer contributes its advantageous properties.
Solution Approach 2:
The patent applies local quality by having different insulating layers positioned at specific locations within the input sensor structure. The organic and inorganic layers are strategically arranged to provide localized protection and flexibility where needed, rather than uniformly increasing thickness throughout the entire structure.
3Reliability
If the insulating layer is made thinner to improve folding characteristics, then the flexibility improves, but the impact resistance deteriorates
Solution Approach 1:
The patent employs composite materials where the organic insulating layer provides the necessary flexibility for folding, while the inorganic insulating layer simultaneously provides impact resistance. This composite approach allows thin overall structure for good folding characteristics while maintaining protection against external impacts through the rigid inorganic layer.
Data Source
AI summary
A display device includes: a display panel comprising a light emitting area and a non-light-emitting area; an input sensor on the display panel; and an anti-reflective layer on the input sensor, the input sensor comprising: a sensing electrode on the display panel and having a first opening defined therethrough to correspond to the light emitting area; a first insulating layer between the sensing electrode and the display panel and having a second opening defined therethrough to correspond to the first opening; and a second insulating layer comprising a first portion inside at least the first opening and the second opening, wherein one of the first insulating layer and the second insulating layer comprises an organic material, the other of the first insulating layer and the second insulating layer comprises an inorganic material, and the first opening has a substantially same shape as the second opening in a plan view.