Display Device Hole Coating for Moisture Barrier
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Display devices face issues with moisture permeation through through holes, leading to shrinkage defects in polarizing films and subsequent appearance defects.
Innovation Solution
A display device design that includes a hole coating layer on the inner walls of through holes to prevent moisture permeation, thereby protecting the polarizing film from shrinkage and appearance defects.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If a through hole is created in the display panel and polarizing member for optical element light reception, then light transmittance is improved, but moisture can permeate through the through hole causing polarizing film shrinkage and appearance defects
Solution Approach 1:
A hole coating layer is introduced as an intermediary substance to fill and seal the through hole. This coating layer acts as a barrier between the through hole (which enables light transmission) and the polarizing member (which would otherwise be exposed to moisture), allowing the system to maintain both light transmittance and moisture protection simultaneously
2Reliability
If the polarizing member is physically penetrated to increase transmittance, then optical performance is improved, but the polarizing film becomes vulnerable to moisture-induced shrinkage
Solution Approach 1:
The hole coating layer is applied in advance to seal the through hole before the polarizing member is fully exposed to the environment. This preliminary sealing action prevents moisture from reaching the polarizing film, thereby maintaining its dimensional stability and preventing shrinkage while still allowing the through hole to serve its optical function
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 implementation of a hole coating layer effectively prevents moisture-induced shrinkage defects in the polarizing film, maintaining the appearance and functionality of the display device.
Implementation Method 1
a through hole which penetrates the display panel and the polarizing member in a thickness direction is defined in the display panel and the polarizing member and the display panel and the polarizing member include a hole coating layer which is disposed on an inner wall of the polarizing member of the first through hole
Data Source
AI summary
A display device includes an active region and a non-active region. The display device includes a display panel and a polarizing member which is disposed on a surface of the display panel, where the display panel and the polarizing member include a first through hole which penetrates the display panel and the polarizing member in a thickness direction and a hole coating layer which is disposed on an inner wall of the polarizing member of the first through hole.