WHITE PAPER Methods for Measuring Display Defects and Mura as Correlated to Human Visual Perception
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Automatic Detection of Region-Mura Defect in TFT-LCD
Visual defects, called mura in the field, sometimes occur during the manufacturing of the flat panel liquid crystal displays. In this paper we propose an automatic inspection method that reliably detects and quantifies TFT-LCD regionmura defects. The method consists of two phases. In the first phase we segment candidate region-muras from TFT-LCD panel images using the modified regression diagno...
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Background and aims: Lighting directly and indirectly affects employeeschr('39') mental health and their performance. Good lighting is required for good visibility of the environment and should provide a luminous environment that is human-friendly and appropriate for the visual task performed. Optimal lighting is one of the most important issues in providing the physical conditions of different...
متن کاملAutomatic mura detection based on thresholding the fused normalized first and second derivatives in four directions
Hani Jamleh Tsung-Yu Li Shen-Zhi Wang Chien-Wen Chen Chia-Chia Kuo Ko-Shun Wang Charlie Chung-Ping Chen Abstract — The size of flat-panel liquid-crystal displays is getting larger; as a result, it is becoming harder to inspect for defects and may require a human visual inspector to judge the severity of the defects on the final product. Recently, mura phenomenon, which is defined as a visual bl...
متن کاملAutomatic Detection of Region-Mura Defects in TFT-LCD Based on Regression Diagnostics
In recent days, large-sized flat-panel display (FPD) has been increasingly applied to computer monitors and TVs. Mura defects, appearing as low contrast or non-uniform brightness region, sometimes occur in manufacturing of the Thin-Film Transistor Liquid-Crystal Displays (TFT-LCD). Implementation of automatic Mura inspection methods is necessary for TFT-LCD production. Various existing Mura det...
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Though machine vision systems for automatically detecting visual defects, called mura, have been developed for thin flat transistor liquid crystal display (TFT-LCD) panels, they have not yet reached a level of reliability which can replace human inspectors. To establish an objective criterion for identifying real defects, some index functions for quantifying defect levels based on human percept...
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