Display Panel Hole Sealing with Thermal Stress Relief
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Cracks around holes in display panels, created during the cutting process for optical elements, can spread and allow moisture penetration, leading to screen defects and reduced reliability.
Innovation Solution
A display device design featuring a stress relief member with a lower thermal expansion coefficient than the sealing member, positioned between the sealing member and the display panel, to mitigate stress and prevent crack growth.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If a laser cutting process is used to create holes in the display panel, then the hole can be precisely formed for optical elements, but cracks are created around the hole due to accumulated energy and stress
Solution Approach 1:
The patent introduces a stress relief member as an intermediary component positioned between the sealing member and the display panel. This stress relief member absorbs and redistributes the stress concentrated around the hole, preventing crack propagation while maintaining the structural integrity established by the laser cutting process.
Solution Approach 2:
The patent modifies the thermal expansion coefficient parameter by selecting a stress relief member with a thermal expansion coefficient lower than that of the sealing member. This parameter change allows the stress relief member to compensate for thermal stress variations, reducing crack risk around the hole without affecting the precision of the hole formation.
2Strength
If cracks spread into the display panel through the inorganic insulating film, then the structural integrity is compromised, but moisture penetration paths are created that damage light emitting elements
Solution Approach 1:
The stress relief member serves as a protective intermediary that prevents cracks from propagating through the inorganic insulating film. By absorbing stress at the interface between the sealing member and display panel, it blocks the pathway that would otherwise allow moisture to reach vulnerable light emitting elements.
Solution Approach 2:
The stress relief member provides beforehand cushioning by being pre-installed in position to absorb and distribute stress before cracks can form or propagate. This preventive measure protects the inorganic insulating film and light emitting elements from moisture penetration by eliminating crack pathways in advance.
3Device complexity
If the sealing member is directly attached to the display panel, then the sealing structure is simple, but thermal expansion stress causes crack growth around holes
Solution Approach 1:
The patent segments the sealing structure by inserting a stress relief member between the sealing member and the display panel. This segmentation divides the direct contact interface into two separate interfaces, allowing each component to accommodate thermal expansion independently while maintaining overall sealing functionality.
Solution Approach 2:
The stress relief member acts as an intermediary layer that decouples the thermal expansion stresses between the sealing member and display panel. This intermediary structure prevents direct stress transmission that would cause crack growth, while adding minimal complexity to the sealing assembly.
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
Reduces crack formation and moisture penetration, enhancing display device reliability and lifespan while minimizing energy consumption and greenhouse gas emissions.
Implementation Method 1
the stress applied to the area adjacent to the upper side surface of the display panel resulted from the thermal expansion and contraction of the sealing member may be relieved
Data Source
AI summary
Disclosed is a display device including a display panel including at least one hole defined in a display area, a cover member disposed on the display panel, a sealing member supporting an edge of the cover member and surrounding side surfaces of the display panel, and a stress relief member disposed adjacent to the at least one hole and disposed between the scaling member and a side surface of the display panel.