手機面板之膜厚與瑕疵檢測技術研究

Abstract

本研究旨在發展出一套適用於手機面板的多功能自動化檢測系統;有別於一般檢測系統只能對表面瑕疵做檢測，對於膜厚的檢測無法實現，因此在本檢測系統中結合了DVD聚焦探頭模組，利用聚焦探頭量測手機面板膜厚;其中探頭部份以市售紅光DVD光學讀取頭做為感測元件，其聚焦方式為像散法，量測原理為利用聚焦誤差訊號曲線性區域之電壓與位移的關係，得到線性的位移量即為面板的膜厚。 在影像擷取過程中，設計正向光源與背向光源於同一站，分別對正向光源影像和背向光源影像取像並進行影像處理。其中，背光影像主要檢測孔洞為主;正光影像又可分為鍍膜區與玻璃基板區並且分開處理，鍍膜區主要有刮傷與油邊瑕疵，玻璃基板區有油污與條紋兩種瑕疵。在處理正光影像時，可藉由二值化、濾波處理、形態處理、點塊自動分析及相關判斷式，定義出瑕疵的特徵並進行分類。

This research aims to develop a multi-function for mobile phone panel automated inspection systems. It is different from the standard system which can only identify surface defects and not for thickness defects. So, this system in combination with a DVD focus probe module and use focus probe to measurement the mobile panel thickness. Adopted a commercial DVD pickup head as the sensor, and focusing by astigmatic method. Using the linear region of the focus error signal curve between the voltage and displacement relationship was measured. And get the panel thickness by linear displacement. In the image acquisition process, the front-lighting and back-lighting are taken from the same station. The main of back-lighting images was detection for holes; front-lighting image may divide into the coating area and the transparent area. The coating area mainly has the scratch and edge defect. The transparent area mainly has the oil stain and stripe defect. It is can define a characteristic by binarization, filtering, morphological processing, automatic analysis and other method for defects, and classify the defects.