Deaho Technology Korea Co.

South Korea

Deaho Technology Korea Co.

South Korea

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Kim H.-M.,Gyeongsang National University | Hong T.-K.,Gyeongsang National University | Jung D.-Y.,Deaho Technology Korea Co. | Lee Y.-H.,Deaho Technology Korea Co. | And 2 more authors.
Journal of Institute of Control, Robotics and Systems | Year: 2014

This paper describes the design of a force applying system for a smart phone curved glass molding system and its characteristic test. The force applying system is composed of a motor and gear, a rectilinear movement structure, a force sensor, an LVDT (Linear Variable Differential Transformer) sensor, an up and down moving block, and so on. The system precisely controls the applying force and time to the plane glass because the glass can be easily destroyed under applied force, and can be bent imperfectly. As a result of the characteristic test, the curved glass can be manufactured using this system, and the holding time under 0N force, the applying force to the plane glass, the time for applying from 0N to maximum force, and the holding time under maximum force at the manufacture feasible temperature 620°were found. © ICROS 2014.


Kim H.-S.,Gyeongsang National University | Lee K.-J.,Gyeongsang National University | Jung D.-Y.,Deaho Technology Korea Co. | Lee Y.-H.,Deaho Technology Korea Co. | And 2 more authors.
Journal of Institute of Control, Robotics and Systems | Year: 2015

This paper describes the design for a defective product inspection device for the curved glass used in smart-phone. Cameras are used as inspection devices to find cracks in LCDs (Liquid Crystal Displays), PDPs (Plasma Display Panels), etc. The devices used to inspect the curved glass used in smart-phone consist of a camera, two back-light apparatus, an inspection apparatus main body, and an image processing program. Camera image calibration was performed to smooth an image taken with the camera, and as a result, the average error was less than 0.12 pixels. And the image of a smart-phone's curved glass taken with the camera was processed using the produced program. As a result, the program could correctly extract the cracks on the curved glass. Thus, it is thought that the designed inspection device can successful detect cracks in curved tempered glass. © ICROS 2015.

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