Optical Parallelism Measuring System for LCD Alignment
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Solution Overview
Problem
The existing pressure-sensitive paper used for parallelism measurement in LCD manufacturing is not reusable, is costly, and provides non-digitized results, limiting precision and efficiency in ensuring flatness and accuracy during component alignment.
Innovation Solution
A parallelism measuring system employing an optical measuring unit with a light source, reflecting unit, and sensing unit, which emits a collimated beam to measure the interval distance between surfaces, allowing for stable, repeatable, and digitalized measurements.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If pressure-sensitive paper is used for parallelism measurement, then measurement can be performed, but the measurement result cannot be digitalized and the paper is not reusable
Solution Approach 1:
The patent replaces the mechanical/chemical pressure-sensitive paper system with an optical measurement system. A light source emits light that reflects off the measured surface and is detected by a sensor, converting physical parallelism measurement into optical signal detection. This substitution enables digitalized measurement results while maintaining measurement capability, directly resolving the contradiction between measurement functionality and digitalization.
2Measurement precision
If pressure-sensitive paper is used for parallelism measurement, then measurement can be performed, but the paper is costly and not reusable
Solution Approach 1:
The patent replaces the consumable pressure-sensitive paper with a reusable optical measurement system consisting of a light source, reflecting surface, and sensor. This system can be used repeatedly without consuming materials, eliminating the need for frequent replacement of expensive paper while maintaining measurement precision.
Solution Approach 2:
The optical measurement system is designed to be self-contained and reusable. The light source, reflecting surface, and sensor work together as a permanent installation that serves itself through repeated measurements without requiring replacement of consumable materials like pressure-sensitive paper.
3Measurement precision
If pressure-sensitive paper is used for parallelism measurement, then pressure distribution can be detected, but frequent adjustments and modifications are required
Solution Approach 1:
The patent replaces the pressure-sensitive paper method with an optical measurement system that provides stable, repeatable measurements. The light source and sensor configuration maintains consistent measurement conditions across multiple uses, eliminating the need for frequent adjustments and modifications required when using pressure-sensitive paper, thereby improving productivity.
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
Enables stable, reusable measurement of parallelism between surfaces, providing digitalized results that enhance precision and reduce costs associated with frequent adjustments and consumable materials.
Implementation Method 1
The light source unit emits a collimated beam to the measured surface
Implementation Method 2
the reflecting unit receives the collimated beam reflected form the measured surface and reflecting again the collimated beam to the reference surface
Data Source
AI summary
Provided is a parallelism measuring system and a method thereof, wherein the system includes a measured module, which includes a measured unit; a reference unit; and an optical measuring unit including an optical measuring module and a shift module. A lower surface of the measured unit is a measured surface and an upper surface of the reference is a reference surface. The optical measuring module includes a light source unit, a reflecting unit, and a sensing unit. A collimated beam is emitted from the light source unit and sequentially reflected by the measured surface, the reflecting unit and the reference surface to the sensing unit. The sensing unit senses location of the collimated beam and thereby calculates interval distance between the measured surface and the reference surface. By using the shift module to move the optical measuring module, the interval distance between different points may be measured.