OLED Panel Warpage Prevention via Structural Stiffening Glue
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Solution Overview
Problem
Traditional OLED display panel manufacturing processes result in warpage of TFT array substrates and covers due to negative pressure states, leading to reduced structural strength and instability of the combined structure.
Innovation Solution
A method involving the application of structural stiffening glue, specifically a UV curing glue mixed with particles, is applied between the TFT array substrate and the cover to fill gaps and increase air pressure, preventing warpage and enhancing structural integrity by ensuring better contact and alignment of frits.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If frits are disposed on edges of sub-substrates to seal the OLED display panel, then sealing effect is improved, but warpage occurs due to negative pressure state between TFT array substrate and cover
Solution Approach 1:
The patent introduces a stiffening structure (reinforcement bar or stiffening plate) as an intermediary element between the TFT array substrate and the cover. This intermediary component provides mechanical support to counteract the warpage caused by negative pressure, while the frits continue to provide sealing at the edges. The stiffening structure acts as a mediator that resolves the conflict between maintaining sealing integrity and preventing deformation.
Solution Approach 2:
The patent employs composite structural design by combining the TFT array substrate, cover, frits, and additional stiffening materials (such as reinforcement bars or stiffening plates) into a composite assembly. This composite structure leverages the complementary properties of different materials to achieve both sealing (through frits) and warpage prevention (through stiffening elements) simultaneously.
2Reliability
If TFT array substrate and cover are correspondingly arranged with frits, then sealing is achieved, but structural strength is reduced due to warpage
Solution Approach 1:
The stiffening structure serves as a mediator that transfers and distributes mechanical loads across the assembly, reducing stress concentrations that would otherwise weaken the sealed structure. By providing additional structural support, the intermediary element enables the frit-sealed joint to maintain both sealing integrity and enhanced structural strength.
Solution Approach 2:
The composite assembly combining TFT array substrate, cover, frits, and stiffening materials creates a structure with superior mechanical properties. The combination of sealing materials (frits) and structural reinforcement materials creates a composite system that simultaneously achieves both sealing and strength requirements.
3Productivity
If cutting is performed after assembling TFT array substrate and cover, then individual display panels are obtained, but displacement occurs due to insufficient structural strength
Solution Approach 1:
The patent applies the preliminary action principle by pre-installing the stiffening structure (reinforcement bar or stiffening plate) onto the TFT array substrate before assembling the cover. This preliminary reinforcement ensures that the structure maintains sufficient strength and dimensional stability during the subsequent cutting process, preventing displacement and maintaining alignment precision while still allowing efficient batch manufacturing.
4Reliability
If frits are positioned on edges as supporting points, then sealing is provided, but edges experience warpage around supporting points reducing overall stability
Solution Approach 1:
The stiffening structure acts as a mediator that distributes the mechanical loads and forces across the entire assembly rather than concentrating them at the frit supporting points. This intermediary element reduces the warpage moments around the frit joints, allowing the frits to maintain their sealing function without becoming sources of structural instability.
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 method effectively prevents warpage, increases structural strength, and improves the stability and lifespan of the OLED display panel by providing a solid connection and cohesive force between the TFT array substrate and the cover.
Implementation Method 1
the structural stiffening glue includes an ultraviolet (UV) curing glue, and the step (E) includes the following step of: (e1) irradiating the UV curing glue by an UV light, so as to cure the UV curing glue
Data Source
AI summary
The present invention discloses an OLED display panel which includes a first TFT array substrate, a first cover and a structural stiffening glue. A first frit and a second frit of the first cover have the structural stiffening glue provided at an outer side thereof, and the structural stiffening glue is in contact with the first TFT array substrate and the first cover. The present invention further discloses a method for manufacturing the OLED display panel. The present invention enables more solid and stable for a structure of the OLED display panel.