OLED Sealant Laser Energy Dispersion
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
The existing OLED display technologies face issues with shape uniformity and crack generation in the sealant due to non-uniform energy dispersion from Gaussian-shaped laser beams, leading to deteriorated sealing performance.
Innovation Solution
The use of a single-mode laser beam with square-shaped spot and cross-section energy dispersion is applied to form a sealant with straight line and crossing portions, enhancing uniformity and bonding strength between the substrate and encapsulation substrate, thereby reducing crack formation and external dead space.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If a Gaussian-shaped laser beam is used to melt and cure the frit, then the sealing process can be completed, but the non-uniform energy dispersion causes deterioration of shape uniformity of the sealant and generation of cracks
Solution Approach 1:
The patent changes the energy dispersion parameter of the laser beam from Gaussian-shaped to square-shaped. This parameter change ensures uniform energy distribution across the frit, eliminating the shape uniformity deterioration and crack generation caused by the non-uniform Gaussian distribution while maintaining effective sealing process completion
Solution Approach 2:
The patent applies a square-shaped laser beam with uniform energy dispersion from the beginning of the sealing process. This preliminary action of using uniformly distributed energy prevents the formation of shape non-uniformity and cracks in the sealant before they can occur during the melting and curing process
2Ease of manufacture
If a Gaussian-shaped laser beam is used to irradiate the frit, then the sealing process can be performed, but energy difference occurs in inner and outer sides of the sealant causing generation of cracks
Solution Approach 1:
The patent changes the energy dispersion parameter of the laser beam from Gaussian-shaped to square-shaped. This parameter change ensures uniform energy distribution across the frit, eliminating the shape uniformity deterioration and crack generation caused by the non-uniform Gaussian distribution while maintaining effective sealing process completion
Solution Approach 2:
The patent applies a square-shaped laser beam with uniform energy dispersion from the beginning of the sealing process. This preliminary action of using uniformly distributed energy prevents the formation of shape non-uniformity and cracks in the sealant before they can occur during the melting and curing process
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
This approach improves the shape uniformity of the sealant, suppresses crack generation, and enhances the bonding strength between the substrate and encapsulation substrate, resulting in improved sealing performance and reduced sealant width.
Implementation Method 1
The sealant includes a frit melted by a laser beam and then cured
Implementation Method 2
forming a sealant by melting and curing the frit by applying a laser beam to the frit
Implementation Method 3
a sealant formed along an edge of the encapsulation substrate between the substrate and the encapsulation substrate to bond the substrate and the encapsulation substrate
Data Source
AI summary
An OLED display includes: a substrate including a display area with a plurality of pixels; an encapsulation substrate at the display area; and a sealant formed along an edge of the encapsulation substrate between the substrate and the encapsulation substrate to bond the substrate to the encapsulation substrate. The sealant includes a plurality of straight line portions and crossing portions formed by two straight line portions crossing each other.