Polarizer Attachment Method for Display Panels
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Solution Overview
Problem
The attachment of polarizers to display panels often results in bonding defects and misalignment due to curl deformations in the polarizers, leading to the formation of linear bubbles, which are not effectively minimized by conventional attachment methods.
Innovation Solution
A method and apparatus that involve measuring the shape of the curl in the polarizer and determining the optimal attachment direction by comparing the curl shape with stored data, allowing the polarizer to be attached by rotating the stages to minimize linear bubble formation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If conventional attachment methods are used, then the attachment process is simple, but linear bubbles and bonding defects occur due to curl deformations
Solution Approach 1:
The system measures the curl shape of the polarizer before attachment and determines the optimal attachment direction in advance. By performing these preparatory measurements and calculations before the actual attachment process, the system eliminates linear bubbles and bonding defects without requiring complex real-time adjustments during attachment, thus improving precision while keeping the overall process manageable.
Solution Approach 2:
The system incorporates a measurement device that detects the curl shape of the polarizer and feeds this information back to the control unit. The control unit then adjusts the attachment direction based on this feedback, creating a closed-loop system that automatically compensates for curl deformations and prevents bonding defects.
2Reliability
If the polarizer is attached without measuring curl shape, then the attachment process is fast, but bonding defects and misalignment occur
Solution Approach 1:
The system performs curl shape measurement and attachment direction determination as preliminary steps before the actual attachment. By completing these preparatory actions in advance, the system ensures high bonding quality and eliminates misalignment issues while maintaining efficient attachment execution without time-consuming adjustments during the bonding process itself.
Solution Approach 2:
The system replaces manual inspection and mechanical trial-and-error attachment methods with automated optical measurement and computational determination of attachment direction. This substitution of mechanical processes with measurement and calculation systems improves bonding reliability while reducing overall attachment time.
3Manufacturing precision
If fixed attachment direction is used, then the attachment process is simple, but linear bubbles form due to curl deformations
Solution Approach 1:
The system transitions from a fixed, static attachment direction to a dynamic, adjustable attachment direction that adapts to the measured curl shape of each polarizer. The attachment direction is determined based on the specific curl characteristics measured for each component, allowing the system to optimize alignment accuracy for each individual case while managing complexity through automated control.
Solution Approach 2:
The system changes the attachment direction parameter based on the measured curl shape parameters of the polarizer. By adjusting this key parameter dynamically rather than using a fixed value, the system achieves high alignment accuracy and prevents linear bubbles while managing complexity through systematic parameter optimization.
Data Source
AI summary
A method of attaching a polarizer includes preparing a first stage on which a display panel is disposed and a second stage on which a first polarizer is disposed, measuring a shape of a curl of the first polarizer; determining an attachment direction of the first polarizer with respect to the display panel based on the measured curl shape of the first polarizer and attaching the first polarizer to a first surface of the display panel by rotating at least one of the first stage and the second stage based on the determined attachment direction.