Display Device Main SOC Seal Structure for Narrow Frames
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Solution Overview
Problem
Existing display devices face challenges in maintaining high reliability while achieving narrow framing, as the alignment film printing errors lead to black spots and moisture intrusion, which deteriorate the display quality.
Innovation Solution
The display device is constructed by adhering first and second substrates with a seal, where a main SOC is disposed like a wall on the peripheral end portion, and the seal is positioned inwardly of the main SOC, accompanied by sub SOCs and grooves to manage gap distances and prevent moisture intrusion.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of moving object
If the alignment film is printed precisely to achieve narrow framing, then the display screen area is increased, but the manufacturing precision requirement becomes excessively high and costs increase
Solution Approach 1:
The patent introduces a seal member as an intermediary element that physically defines the boundary between the display region and the frame region. The seal member's outer peripheral surface serves as a reference surface for forming the alignment film, eliminating the need for high-precision printing relative to the substrate edges. This mediator structure absorbs the precision requirements, allowing standard printing tolerances to be used while still achieving narrow framing.
Solution Approach 2:
The alignment film is formed with different reference surfaces in different regions: in the display region, it uses the seal member's outer peripheral surface as the reference, while in the frame region, it uses the substrate's outer peripheral surface. This local differentiation allows each region to have optimized quality characteristics without requiring uniform high precision across the entire substrate.
2Ease of manufacture
If the alignment film printing is not precisely controlled, then manufacturing costs are reduced, but black spots and moisture intrusion occur, deteriorating display quality and reliability
Solution Approach 1:
The seal member acts as a physical barrier and reference structure that prevents moisture intrusion and defines the alignment film formation boundary. By using the seal member's surface as the reference instead of requiring precise printing relative to substrate edges, the system becomes tolerant of normal printing variations while maintaining reliability through the seal member's protective function.
Solution Approach 2:
The seal member is installed beforehand to create a protective barrier against moisture and to establish the reference surface for alignment film formation. This prior preparation cushions against potential defects from imprecise printing by providing a physical reference that ensures proper alignment film formation even with standard printing tolerances.
3Area of moving object
If the frame portion is narrowed to increase display area, then the display-to-configuration ratio is improved, but the risk of alignment errors and moisture intrusion increases
Solution Approach 1:
The seal member serves as a mediator that physically separates and protects the display region from the frame region. Its outer peripheral surface provides a reference for alignment film formation that is independent of substrate edge variations, enabling narrow framing while maintaining alignment accuracy and preventing moisture intrusion through its sealing function.
Solution Approach 2:
The seal member functions as a flexible sealing structure that can accommodate slight variations in substrate dimensions and alignment while maintaining its protective barrier function. This flexibility allows the system to achieve narrow framing without being overly sensitive to manufacturing tolerances.
Data Source
AI summary
In a display device having high reliability, even if being a narrow framing type, and a method for manufacturing thereof, having a display panel, being made up with a first substrate 101 and a second substrate 201, which are adhered with using a seal 301, a main SOC 302 is disposed like a wall, on a peripheral end portion of the first substrate 101 and the second substrate 201, and the seal 301 is disposed inwardly of the main SOC 302. Also, in a method for manufacturing thereof, the main SOC 302 is formed in a region including a cutting plane between the display panel regions neighboring with, and on the cutting plane is made the cutting thereof.