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26 January 2018 High-resolution imaging optomechatronics for precise liquid crystal display module bonding automated optical inspection
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Abstract
With the development of the liquid crystal display (LCD) module industry, LCD modules become more and more precise with larger sizes, which demands harsh imaging requirements for automated optical inspection (AOI). Here, we report a high-resolution and clearly focused imaging optomechatronics for precise LCD module bonding AOI inspection. It first presents and achieves high-resolution imaging for LCD module bonding AOI inspection using a line scan camera (LSC) triggered by a linear optical encoder, self-adaptive focusing for the whole large imaging region using LSC, and a laser displacement sensor, which reduces the requirements of machining, assembly, and motion control of AOI devices. Results show that this system can directly achieve clearly focused imaging for AOI inspection of large LCD module bonding with 0.8  μm image resolution, 2.65-mm scan imaging width, and no limited imaging width theoretically. All of these are significant for AOI inspection in the LCD module industry and other fields that require imaging large regions with high resolution.
© 2018 SPIE and IS&T 1017-9909/2018/$25.00 © 2018 SPIE and IS&T
Guangming Ni, Lin Liu, Jing Zhang, Juanxiu Liu, and Yong Liu "High-resolution imaging optomechatronics for precise liquid crystal display module bonding automated optical inspection," Journal of Electronic Imaging 27(1), 013013 (26 January 2018). https://doi.org/10.1117/1.JEI.27.1.013013
Received: 12 September 2017; Accepted: 9 January 2018; Published: 26 January 2018
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