Polarizing Layer Edge Deformation for Particle-Free Pad Areas
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Solution Overview
Problem
In display devices, the cutting of polarizing layers during fabrication often results in particles remaining in the pad areas, which can cause connection failures when electronic elements are attached, leading to inefficiencies and potential device malfunctions.
Innovation Solution
A polarizing layer with a deformation part at its edge, formed by heat deformation, is used, and a method involving laser cutting with specific irradiation paths to prevent particles from remaining in the pad areas by ensuring they are removed or do not form during the cutting process.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If the polarizing layer is cut in a state in which the polarizing layer is attached to a display panel, then the cutting process can be simplified and integrated into the assembly workflow, but particles are generated during cutting and remain in the pad area causing connection failures
Solution Approach 1:
The patent extracts the harmful particles from the pad area by designing the cutting path to direct particles away from the pad area through the deformation part structure. The V-shaped or U-shaped deformation parts create a particle ejection path that removes particles from the critical pad region during the cutting process.
Solution Approach 2:
The patent converts the harmful thermal deformation and particle generation during laser cutting into a beneficial effect by designing the deformation parts to channel particles away from the pad area. The heat-induced deformation that previously caused problems is now utilized to create a particle ejection mechanism that protects the pad area.
2Productivity
If laser cutting is performed with standard irradiation paths, then the cutting process is simple and fast, but particles are generated and deposited in the pad area leading to connection failures
Solution Approach 1:
The patent applies local quality by creating specific deformation part structures (V-shaped or U-shaped) at particular locations along the polarizing layer edge. These localized structural modifications create different particle ejection characteristics in different regions, directing particles away from the pad area while maintaining cutting efficiency.
Solution Approach 2:
The patent implements preliminary action by pre-forming the deformation parts on the polarizing layer before the cutting process. This pre-structuring ensures that when cutting occurs, particles are automatically directed away from the pad area through the pre-designed deformation pathways, preventing particle deposition before it can occur.
3Device complexity
If the polarizing layer is cut after attachment to the display panel, then manufacturing steps are reduced, but the cutting generates particles that contaminate the pad area
Solution Approach 1:
The patent converts the harmful particle generation during laser cutting into a beneficial particle ejection mechanism. The deformation parts are designed to use the thermal energy and mechanical stress from the cutting process to actively eject particles away from the pad area, transforming the contamination problem into a self-cleaning effect.
Solution Approach 2:
The deformation parts act as an intermediary structure between the cutting process and the pad area. They intercept and redirect particles generated during cutting, serving as a protective barrier that prevents particles from reaching the pad area while allowing the cutting process to proceed efficiently.
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 solution effectively prevents particles from accumulating in the pad areas, thereby ensuring reliable connections and preventing connection failures, enhancing the fabrication process and device performance.
Implementation Method 1
the deformation part includes first deformation parts formed as the base film is deformed by heat, and at least one second deformation part provided between the first deformation parts adjacent to each other
Implementation Method 2
cutting a region of the polarizing layer, which protrudes from an outside of the display panel, using a laser
Data Source
AI summary
A polarizing layer includes a base film and a deformation part provided in an edge of the base film. The deformation part includes first deformation parts formed as the base film is deformed by heat, and at least one second deformation part provided between the first deformation parts adjacent to each other.