Photocurable Sealing Layer for Display Touch Sensitivity
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Solution Overview
Problem
Current display apparatus manufacturing methods face challenges in effectively sealing organic light-emitting devices to prevent water and oxygen penetration, which can lead to reduced lifespan and performance, and in integrating touch screen functionality without compromising the display's sensitivity and durability.
Innovation Solution
A display apparatus structure is proposed, featuring a substrate with a display unit, a sealing layer composed of alternating organic and inorganic layers, a buffer layer, and a touch screen layer, where the sealing layer and buffer layer are formed using photocurable monomers to enhance sealing and touch sensitivity, and the touch screen layer is designed for efficient electrostatic capacity detection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a sealing layer is formed to prevent water and oxygen penetration, then reliability is improved, but device complexity increases
Solution Approach 1:
The sealing layer is divided into multiple sealing units (first sealing unit, second sealing unit, etc.), each comprising alternating organic and inorganic layers. This segmentation allows each layer to perform specific functions (barrier, sealing, flexibility) and enables independent optimization of each layer's properties to achieve overall improved sealing performance while managing structural complexity
Solution Approach 2:
The sealing layer employs composite material structure with alternating organic layers (providing flexibility and stress resistance) and inorganic layers (providing barrier properties against water and oxygen). This composite approach combines the advantages of different materials to achieve superior sealing performance that neither material could provide alone
2Ease of operation
If a buffer layer is added between sealing layer and touch screen layer, then touch sensitivity is improved, but device complexity increases
Solution Approach 1:
A buffer layer is introduced as an intermediary component between the sealing layer and the touch screen layer. This buffer layer acts as a mediator that improves touch sensitivity by providing appropriate mechanical coupling and stress distribution, while also protecting the sealing layer from stress caused by touch operations on the screen
3Manufacturing precision
If photocurable monomers are used to form sealing and buffer layers, then manufacturing precision is improved, but use of energy increases
Solution Approach 1:
The patent replaces traditional thermal curing processes with photocurable monomers that cure upon light exposure. This substitution of mechanical/thermal processes with optical processes enables more precise control over layer formation timing and position, improving manufacturing precision while potentially reducing overall energy consumption through localized curing
4Reliability
If multiple sealing units with alternating organic and inorganic layers are used, then reliability is improved, but manufacturing precision requirements increase
Solution Approach 1:
The sealing structure is segmented into discrete sealing units with clearly defined organic and inorganic layers. Each layer is designed with specific thickness ranges and material properties that facilitate controlled deposition and assembly, making the precision requirements more manageable through modular construction
Solution Approach 2:
The patent specifies particular parameter ranges for each layer (thickness, material composition, curing conditions) that optimize both sealing performance and manufacturability. By controlling these parameters within defined ranges, the system achieves high reliability while maintaining feasible manufacturing precision requirements
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 effectively seals the display unit, reduces water and oxygen ingress, and enhances touch screen sensitivity and durability, thereby extending the display's lifespan and improving user interaction.
Implementation Method 1
The composition for forming the organic layer includes a first photocurable monomer. The buffer layer includes a cured product for forming a buffer layer. The cured product for forming the buffer layer includes a second photocurable monomer and a third photocurable monomer. The first photocurable monomer and the second photocurable monomer include a photocurable functional group.
Data Source
AI summary
A display apparatus including a substrate; a display unit disposed on the substrate; a sealing layer disposed on the display unit; a touch screen layer disposed on the sealing layer; and a buffer layer disposed between the sealing layer and the touch screen layer. The sealing layer includes n sealing units each including an organic layer and an inorganic layer, in which n is an integer of 1 or greater. The organic layer and the inorganic layer are sequentially stacked on the display unit. The organic layer includes a cured product for forming an organic layer including a first photocurable monomer. The buffer layer includes a cured product for forming a buffer layer including a second and third photocurable monomer. The first and second photocurable monomers include a photocurable functional group. The third photocurable monomer is represented by Formulae 1A to 1C.