scholarly journals Survey of Mura Defect Detection in Liquid Crystal Displays Based on Machine Vision

Crystals ◽  
2021 ◽  
Vol 11 (12) ◽  
pp. 1444
Author(s):  
Wuyi Ming ◽  
Shengfei Zhang ◽  
Xuewen Liu ◽  
Kun Liu ◽  
Jie Yuan ◽  
...  
Keyword(s):  
Liquid Crystal ◽  
Machine Vision ◽  
Defect Detection ◽  
Manufacturing Process ◽  
Liquid Crystal Display ◽  
Research Direction ◽  
Development Trend ◽  
Display Device ◽  
Low Contrast ◽  
Advantages And Disadvantages

Liquid crystal display (LCD) is a display device based on liquid crystal electro-optic effect, and LCDs have gradually appeared and have become an indispensable part of people’s lives. In the development of LCD technology, the detection of Mura defects is a key concern in the manufacturing process. The Mura defect is a kind of display defect with low contrast and an irregular shape. This study first explains the mechanism of Mura defects in the LCD manufacturing process and classifies typical Mura defects. Then, three main purposes for the defect detection of LCDs are compared, and the advantages and disadvantages are conducted. Following that, this research examines reviews the linked literature on image preprocessing, feature extraction, dimension reduction, and classifiers of Mura defects. Finally, the future development trend and research direction of Mura defect detection based on machine vision can be drawn by this study.

Recent Reviews on Machine Vision-Based 3D Reconstruction

2021 ◽  
Vol 14 ◽  
Author(s):  
Hongxin Zhang ◽  
Shaowei Ma ◽  
Meng Li ◽  
Hanghang Jiang ◽  
Jiaming Li
Keyword(s):  
Machine Vision ◽  
3D Reconstruction ◽  
Autonomous Navigation ◽  
Robot Vision ◽  
Research Direction ◽  
Development Trend ◽  
Future Research ◽  
The Future ◽  
The Development Trend ◽  
Better Than

Background: In machine vision, the 3D reconstruction is widely used in medical system, autonomous navigation, aviation and remote sensing measurement, industrial automation and other fields, and the demand for reconstruction precision is significantly highlighted. Therefore, the 3D reconstruction is of great research value and will be an important research direction in the future. Objective: By reviewing the latest development and patent of 3D reconstruction, this paper provides references to researchers in related fields. Methods: Machine vision-based 3D reconstruction patents and literatures were analyzed from the aspects of the algorithm, innovation and application. Among them, there are more than 30 patents and nearly 30 literatures in the past ten years. Results: Researches on machine vision-based 3D reconstruction in recent 10 years are reviewed, and the typical characteristics were concluded. The main problems in its development were analyzed, the development trend was foreseen, and the current and future research on the productions and patents related to machine vision-based 3D reconstruction is discussed. Conclusion: The reconstruction result of binocular vision and multi-vision is better than monocular vision in most cases. Current researches of 3D reconstruction focus on robot vision navigation, intelligent vehicle environment sensing system and virtual reality. The aspects that need to be improved in the future include: improving robustness, reducing computational complexity, and reducing operating equipment requirements, and so on. Furthermore, more patents on machine vision-based 3D reconstruction also should be invented.

Computation of liquid crystal display device parameters through image analysis in supramolecule MA:nOBA

2020 ◽  
pp. 1-14
Author(s):  
Kalyani T ◽  
Mallika K ◽  
Ashok Kumar AVN ◽  
Sreehari Sastry Sreeramakavacham
Keyword(s):  
Image Analysis ◽  
Liquid Crystal ◽  
Liquid Crystal Display ◽  
Display Device

P-155: A Novel Liquid Crystal Display Device Applicable to Memory and Dynamic Modes with a Single Panel

2006 ◽  
Vol 37 (1) ◽  
pp. 794 ◽  
Author(s):  
Chul Gyu Jhun ◽  
Chao Ping Chen ◽  
Tae-Hoon Yoon ◽  
Jae Chang Kim
Keyword(s):  
Liquid Crystal ◽  
Liquid Crystal Display ◽  
Display Device

Band-Separated UV Exposure on a Photosensitive Polyimide Layer With Embedded Reactive Mesogen for a High-Speed Liquid Crystal Display Device

2015 ◽  
Vol 62 (11) ◽  
pp. 3722-3726 ◽  
Author(s):  
Byung-June Mun ◽  
Joun Ho Lee ◽  
Byeong Koo Kim ◽  
Hyun Chul Choi ◽  
Bongsoon Kang ◽  
...  
Keyword(s):  
Liquid Crystal ◽  
High Speed ◽  
Liquid Crystal Display ◽  
Uv Exposure ◽  
Display Device ◽  
Polyimide Layer

Novel bistable reflective cholesteric liquid crystal display device for use with night vision goggles

1998 ◽  
Author(s):  
Asad A. Khan ◽  
Donald J. Davis ◽  
Xiao-Yang Huang ◽  
Nick Miller ◽  
Chad M. Jones ◽  
...  
Keyword(s):  
Liquid Crystal ◽  
Liquid Crystal Display ◽  
Cholesteric Liquid Crystal ◽  
Night Vision ◽  
Display Device

Wide Pretilt Angle Control of Liquid Crystal Display Device by Ion Beam Exposure on the Vertical Aligning Layer

2007 ◽  
Vol 46 (No. 44) ◽  
pp. L1074-L1076 ◽  
Author(s):  
Joo-Hong Seo ◽  
Hong Jeek Jang ◽  
Sung Ryong Lee ◽  
Tae-Hoon Yoon ◽  
Jae Chang Kim ◽  
...  
Keyword(s):  
Liquid Crystal ◽  
Liquid Crystal Display ◽  
Ion Beam ◽  
Display Device ◽  
Pretilt Angle

Analysis on De-Icing Methods for 4-Bundle 500kV Transmission Lines

2013 ◽  
Vol 694-697 ◽  
pp. 790-794
Author(s):  
Shun Xin Liu ◽  
You Han Guo
Keyword(s):  
Transmission Line ◽  
South China ◽  
Transmission Lines ◽  
Research Direction ◽  
Development Trend ◽  
Ice Melting ◽  
Power Networks ◽  
Advantages And Disadvantages ◽  
Prevention And Treatment ◽  
The Development Trend

In view of the massive transmission lines suffered disaster of ice coating at the beginning of 2008 in south China. In this paper, several typical schemes for the prevention and treatment of ice coating occurred in power networks home and abroad are analyzed. Common melting ice methods can be divided into three kinds: thermal ice-melting, mechanical de-icing and new de-icing. This paper describes a 500 kV transmission line and analyses each of these measures briefly. At the same time, the advantages and disadvantages of various measures and their applications were summarized. At last, the development trend and the research direction were pointed out．

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