Display Coating Window Curing to Remove Unreacted Compounds
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Solution Overview
Problem
Existing display devices face challenges in maintaining reliability when exposed to external light sources due to unreacted compounds in the coating window, which can cause deformation and damage to the display module.
Innovation Solution
A display device with a coating window formed from a window resin containing a polymer resin, a photoinitiator, and a photosensitizer, where the content of each is less than 10,000 atomic mass units, and is cured using near infrared rays to minimize unreacted residues, ensuring excellent reliability and durability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a coating window is formed from window resin containing photoinitiator and photosensitizer, then the coating window can be cured to form a protective layer, but unreacted compounds remain causing deformation and damage to the display module under external light exposure
Solution Approach 1:
The patent extracts and removes unreacted photoinitiator and photosensitizer compounds from the cured coating window through a specific removal process. This extraction eliminates the harmful unreacted compounds that cause deformation and damage under external light exposure, while preserving the cured resin structure that provides protective functionality.
Solution Approach 2:
The patent changes the molecular weight parameter of the photoinitiator and photosensitizer to less than 10,000 amu. This parameter change enables easier removal of these compounds through the specified process, reducing their harmful effects while maintaining the curing functionality of the coating window.
2Duration of action of stationary object
If conventional curing methods are used, then the coating window can be formed, but unreacted compounds remain causing yellowing and degradation over time
Solution Approach 1:
The patent applies an extraction process specifically designed to remove unreacted photoinitiator and photosensitizer compounds from the cured coating window. This removal eliminates the sources of yellowing and degradation, thereby extending the service life and maintaining the optical properties of the coating window throughout its operational duration.
Solution Approach 2:
By changing the molecular weight parameter of the photoinitiator and photosensitizer to less than 10,000 amu, the patent enables more effective removal of these compounds through the specified extraction process, reducing long-term degradation and yellowing while preserving the curing functionality.
3Reliability
If high molecular weight photoinitiator and photosensitizer are used, then the coating window has sufficient stability, but unreacted compounds are difficult to remove without damaging the display module
Solution Approach 1:
The patent optimizes the molecular weight parameter of the photoinitiator and photosensitizer to less than 10,000 amu. This parameter change creates a balance where the compounds remain stable enough to perform their curing function but are sufficiently small to be easily removed through the specified extraction process without damaging the display module.
Solution Approach 2:
The patent uses a composite approach by selecting specific photoinitiator and photosensitizer compounds with molecular weights less than 10,000 amu that work synergistically with the window resin. This composite material selection enables both sufficient stability for curing and ease of removal of unreacted compounds.
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 removes unreacted compounds, minimizing deformation and maintaining optical and mechanical properties, thereby enhancing the display device's reliability and display quality under external light exposure.
Implementation Method 1
curing the provided window resin using ultraviolet rays
Implementation Method 2
providing near infrared rays to the coating window
Data Source
AI summary
A display device includes a display module, a light control layer disposed on the display module, and a coating window disposed directly on an upper surface of the light control layer and formed from a window resin including a polymer resin, a photoinitiator, and a photosensitizer. A content of each of the photoinitiator and the photosensitizer included in the coating window is less than about 10,000 atomic mass unit, and the content is measured through gas chromatography-mass spectrometry, and thus the display device may maintain excellent optical properties to exhibit improved reliability.