Self-Assembled Monolayer Moisture Barrier for Display Panels
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Solution Overview
Problem
Liquid crystal displays face issues with moisture transmission through exposed edges, leading to deteriorated display quality due to the limitations of existing moisture-blocking materials like silicon glue and acryl-based sealants, which allow high moisture transmittance.
Innovation Solution
A display device with a metal oxide layer and a self-assembled monolayer barrier layer, including silane or thiol compounds, is used to surround the outer surfaces of the display panels and sealing member, forming a hydrophobic barrier that significantly reduces moisture transmission rates below 10−4 g/m2/day.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If silicon glue material or acryl-based sealant material is used to prevent moisture transmission, then moisture blocking is attempted, but moisture transmittance remains high and moisture transmission cannot be effectively prevented
Solution Approach 1:
The patent employs a composite moisture barrier structure consisting of a first moisture barrier layer (organic material such as acryl-based resin) and a second moisture barrier layer (inorganic material such as aluminum oxide, silicon oxide, or titanium oxide). This composite structure combines the advantages of both organic and inorganic materials to achieve superior moisture blocking performance that neither material can achieve alone, effectively resolving the contradiction between moisture blocking capability and moisture transmittance.
2Ease of operation
If the second display panel is made smaller to accommodate circuit film and pads, then electrical connection is achieved, but exposed edges of the first display panel allow moisture transmission
Solution Approach 1:
The patent applies a sealing member that extends along the exposed edges of the first display panel, creating a physical barrier in the form of a thin film structure. This sealing member forms a sealing cavity that prevents moisture from accessing the exposed edges and penetrating into the display panel, thereby resolving the moisture transmission issue caused by the size difference between panels.
3Reliability
If moisture transmission is prevented using conventional materials, then some protection is provided, but display quality deteriorates due to insufficient blocking performance
Solution Approach 1:
The patent uses a composite moisture barrier structure with both organic and inorganic layers to achieve superior moisture blocking performance. This enhanced protection prevents moisture from reaching the liquid crystal layer and other sensitive components, thereby maintaining high display quality and resolving the contradiction between protection level and display quality.
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 blocks moisture, enhancing the display quality by reducing moisture transmission and preventing degradation, thus improving the reliability of liquid crystal displays.
Implementation Method 1
The barrier layer includes a self-assembled monolayer
Implementation Method 2
forming a hydrophobic barrier that significantly reduces moisture transmission rates
Implementation Method 3
A silicon oxide layer, an aluminum oxide layer, a tantalum nitride layer or a titanium nitride layer may be formed on the outermost surfaces of the lower display panel, the upper display panel and the sealing member
Data Source
AI summary
A display device includes a lower display panel, an upper display panel facing the lower display panel, a metal oxide layer surrounding outermost surfaces of the upper display panel and the lower display panel, and a barrier layer surrounding the metal oxide layer. The barrier layer includes a self-assembled monolayer.