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http://dx.doi.org/10.14775/ksmpe.2022.21.03.100

Calibration Technology for Precise Alignment of Large Flat Panel Displays  

Hong, Jun-Ho (Department of Mechanical Engineering, Graduate School of Kumoh National Institute of Technology)
Shin, Dongwon (Department of Mechanical System Engineering, Kumoh National Institute of Technology)
Publication Information
Journal of the Korean Society of Manufacturing Process Engineers / v.21, no.3, 2022 , pp. 100-109 More about this Journal
Abstract
In this study, calibration technology that increases the alignment accuracy in large flexible flat panels was studied. For precise of calibration, a systematization of the calibration algorithm was established, and a calibration correction technique was studied to revise calibration errors. A coordinate systems of camera and UVW stage was established to get the global position of the mark, and equations for translational and rotational calibration were systematically derived based on geometrical analysis. Correction process for the calibration data was carried, and alignment experiments were performed sequentially in cases of the presence or absence of calibration-correction. Alignment results of both calibration correction and non-calibration correction showed accuracy performance less than 1㎛. On the other hand, the standard deviation in calibration-correction is smaller than non-calibration correction. Therefore, calibration correction showed improvement of the alignment repeatability.
Keywords
Lage Flat Panel Display; Camera; Mark; Alignment; Calibration; Calibration Correction;
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