Curved LCD Panel Edge Structure for Residue-Free Encapsulation
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Solution Overview
Problem
Conventional display panel grinding technologies result in metal foreign residues, leading to shorting of wirings and preventing side surface encapsulation, which affects yield rate and cost in curved frame-less liquid crystal display (LCD) products.
Innovation Solution
The display panel design incorporates a display region and a bonding region with specific angled and curved surfaces on the array substrate and color filter substrate, along with a bonding terminal, to prevent metal residues and facilitate even grinding, allowing for improved encapsulation and coating efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If a semi-circular end surface grinding process is used to improve the strength of curved display panels, then the strength is improved, but metal foreign residues remain in the display panel causing shorting of wirings
Solution Approach 1:
The patent segments the grinding process into two distinct stages: a first grinding process that grinds the end surface to a predetermined thickness, and a second grinding process that grinds the side surface. This segmentation allows each grinding stage to be optimized independently, preventing metal residues from contaminating the display region while still achieving the required strength.
Solution Approach 2:
The patent applies different grinding characteristics to different regions: the end surface is ground to a specific thickness to maintain strength, while the side surface is ground with controlled depth and angle to prevent metal residue generation in the display region. This local differentiation of grinding quality resolves the contradiction between strength and contamination prevention.
2Strength
If a semi-circular grinding process is used to improve strength, then strength is improved, but the side surface cannot be encapsulated and bubbles occur
Solution Approach 1:
The patent introduces a controllable side surface grinding process with adjustable grinding depth and angle, transforming the static semi-circular shape into a dynamic, customizable geometry. This allows the side surface to be ground at an optimal angle that enables proper encapsulation while maintaining the strength benefits of the curved design.
Solution Approach 2:
The patent changes the geometric parameters of the ground surface by controlling the grinding depth and angle. Specifically, the side surface is ground at a controlled angle relative to the display surface, creating a geometry that facilitates encapsulation. This parameter adjustment resolves the contradiction between maintaining strength and enabling proper encapsulation without bubbles.
3Productivity
If conventional grinding is used, then metal residues are generated, but changing the grinding method improves production efficiency and yield rate
Solution Approach 1:
The patent performs preliminary grinding of the end surface to a predetermined thickness before the side surface grinding. This preliminary action removes excess material and prepares the workpiece for the final side surface grinding, ensuring that metal residues are generated only in controlled areas that do not affect the display region, thereby improving both yield rate and production efficiency.
Solution Approach 2:
The patent extracts the harmful metal residue generation from the display region by separating the end surface grinding and side surface grinding into distinct processes. The side surface grinding is performed with controlled parameters to remove material only from non-display areas, effectively taking out the contamination risk while maintaining production efficiency.
Data Source
AI summary
The present invention provides a display panel and the manufacturing method thereof. The display panel includes an array substrate, a color filter substrate, and a bonding terminal. The array substrate has a first surface, a second surface, and a side surface connecting the first surface and the second surface. A side surface of the array substrate includes a first connection surface. The first connection surface is a curved surface. The color filter substrate and the bonding terminal are disposed on the first surface of the array substrate. The side surface of the color filter substrate intersects a surface of the color filter substrate away from the array substrate to form a first included angle, and the first included angle is an acute angle or a right angle.