Automated Polarizer Alignment for Non-Rectangular Shapes
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Solution Overview
Problem
The alignment of non-rectangular polarizers in TFT-LCD fabrication is challenging due to lower accuracy and increased manpower and time requirements, especially for circular and regular polygonal shapes, which can lead to substrate damage and complex processes.
Innovation Solution
An alignment apparatus and method that includes an angle adjustment device with an angle acquirement unit and an angle compensation unit to accurately adjust the polarizer's angle based on detected light intensity and pre-stored look-up tables, and a position adjustment device to align the polarizer in X and Y directions, ensuring precise alignment regardless of shape.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If hand alignment is used for circular or regular polygonal polarizers, then alignment can be achieved, but alignment accuracy decreases and manpower and time are wasted
Solution Approach 1:
The patent replaces manual mechanical alignment operations with an automated optical detection and control system. The system uses light intensity detection to automatically determine polarizer orientation and employs automated rotation mechanisms to achieve precise alignment, eliminating the need for manual hand alignment while significantly improving accuracy.
Solution Approach 2:
The alignment system performs self-alignment through automated detection and adjustment. The light detection unit automatically measures the polarizer's orientation, and the control system autonomously calculates and executes the necessary rotation to achieve optimal alignment, making the system self-sufficient without requiring manual intervention.
2Extent of automation
If alternative process of fabricating circular polarizer in square form and then removing excess portion is employed, then automatic attachment process can be used, but the process becomes complex and may damage the substrate
Solution Approach 1:
The patent extracts and eliminates the unnecessary steps of fabricating polarizers in square form and subsequently removing excess portions. Instead, the system directly handles and aligns circular or regular polygonal polarizers through automated detection and rotation, removing the complex intermediate fabrication and material removal steps while maintaining automation.
Solution Approach 2:
Rather than creating a polarizer in an easy-to-handle shape and then modifying it to the desired shape, the patent inverts the approach by directly aligning the polarizer in its final desired shape (circular or regular polygonal) using automated optical detection and rotation control, thereby eliminating the need for shape transformation steps.
3Extent of automation
If alternative process of fabricating circular polarizer in square form and then removing excess portion is employed, then automatic attachment process can be used, but risk of substrate damage increases
Solution Approach 1:
The system performs preliminary detection and calculation of the polarizer's orientation and required rotation angle before any physical adjustment is made. This preliminary action allows the system to plan the optimal rotation path and apply adjustments gradually, preventing sudden movements or excessive forces that could damage the substrate.
Solution Approach 2:
The patent employs dynamic, gradual rotation adjustments rather than sudden or forced positioning. The rotation unit makes controlled, incremental adjustments based on real-time feedback from the light detection system, allowing the polarizer to be gently guided to the correct orientation without applying excessive force that could damage the fragile substrate.
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 solution improves the accuracy and efficiency of polarizer alignment, reducing the complexity and risk of damage during the alignment process, thereby enhancing the display performance of TFT-LCDs by ensuring precise alignment of polarizers of any shape.
Implementation Method 1
detect intensity of light which transmits both the polarizer to be aligned and the analyzing polarizer
Data Source
AI summary
An alignment apparatus and an alignment method are provided. The alignment apparatus is configured to align a polarizer. The alignment apparatus comprises an angle adjustment device. The angle adjustment device is configured to: adjust an angle of the polarizer to be aligned according to an angle offset of the polarizer to be aligned in a plane where the polarizer to be aligned is located. The alignment apparatus and the alignment method reduce difficulty in alignment of non-rectangular polarizer.