Polarizer Edge Trimming and Side Wiring for Zero-Bezel Displays
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Solution Overview
Problem
Conventional display devices suffer from a step difference between the display panel and the polarizing layer, leading to visible bezels and light leakage, which limits the reduction of bezel width and hinders the achievement of ultra-high resolution displays.
Innovation Solution
A method involving the use of a cutting laser beam to remove the step difference between the polarizing layer and the display panel, followed by the application and patterning of conductive paste using laser beams to form ultra-fine conductive patterns, allowing for side bonding of the driving circuit and minimizing the bezel width.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the polarizing layer is extended beyond the display panel edge to ensure complete coverage, then the polarizing layer provides adequate optical coverage, but a step difference is created between the polarizing layer and display panel, resulting in visible bezels and light leakage
Solution Approach 1:
The patent extracts the polarizing layer from extending beyond the display panel edge by precisely controlling its length to match the panel dimensions. This eliminates the step difference and associated visual defects while maintaining adequate optical coverage through precise dimensional control.
Solution Approach 2:
The patent changes the length parameter of the polarizing layer to exactly match the display panel edge, transforming it from an extended configuration that creates step differences to a precisely fitted configuration that eliminates visual defects while maintaining optical functionality.
2Ease of manufacture
If conventional manufacturing methods are used, then the manufacturing process is simple, but ultra-fine conductive patterns cannot be formed at the side surface, limiting bezel reduction and ultra-high resolution achievement
Solution Approach 1:
The patent replaces conventional mechanical patterning methods with laser beam technology. The laser beam enables precise formation of ultra-fine conductive patterns at the side surface without complex mechanical tooling, achieving both high precision and manufacturing simplicity through non-contact energy processing.
Solution Approach 2:
The patent changes the manufacturing approach from mechanical contact methods to laser energy processing, transforming the way conductive patterns are formed. This enables ultra-fine precision at the side surface while maintaining ease of manufacture through a streamlined laser-based process.
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
This approach enables the realization of zero-bezel displays with ultra-high definition and higher resolutions by eliminating the step difference and accurately forming side conductive patterns, enhancing the display's aesthetic and functional capabilities.
Implementation Method 1
cutting the polarizing layer using a cutting laser beam such that a side of the polarizing layer and a side of the display panel correspond to each other
Implementation Method 2
patterning the conductive paste using a patterning laser beam
Data Source
AI summary
A method of manufacturing a display device includes disposing a polarizing layer on one surface of a display panel including a thin film transistor and a pixel electrode; cutting the polarizing layer using a cutting laser beam such that a side of the polarizing layer and a side of the display panel correspond to each other; applying a conductive paste on the side of the display panel; and patterning the conductive paste using a patterning laser beam.