Nondestructive defect inspection for LCDs using optical coherence tomography

► We used optical coherence tomography (OCT) to perform nondestructive inspection of liquid crystal display (LCD) for defects. ► We construct 3D images of the LCD panel and confirm the 3D shape and vertical location of eventual defects in the LCD panel. ► It gives users more direct and relevant info...

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Bibliographic Details
Published in:Displays 2011-12, Vol.32 (5), p.325-329
Main Authors: Kim, Su-Hwan, Kim, Jee-Hyun, Kang, Shin-Won
Format: Article
Language:English
Subjects:
Applied sciences
Defect inspection
Display
Electronics
Exact sciences and technology
Nondestructive inspection
Optical coherence tomography
Semiconductor electronics. Microelectronics. Optoelectronics. Solid state devices
Testing, measurement, noise and reliability
TFT-LCD
Transistors
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Summary:► We used optical coherence tomography (OCT) to perform nondestructive inspection of liquid crystal display (LCD) for defects. ► We construct 3D images of the LCD panel and confirm the 3D shape and vertical location of eventual defects in the LCD panel. ► It gives users more direct and relevant information about defects than other display inspection technique. In this study, we used optical coherence tomography (OCT) to perform nondestructive inspection of liquid crystal display (LCD) for defects. By using OCT, we obtain tomograms and two-dimensional images of LCD panels. Based on these images, we construct three-dimensional images of the LCD panel and confirm the three-dimensional shape and vertical location of eventual defects with in the LCD panel. This nondestructive and effective defect-inspection method for LCD using OCT that gives direct results and is applicable for detecting defects in flat panel or flexible displays.
ISSN:0141-9382
1872-7387
DOI:10.1016/j.displa.2011.04.002