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Proceedings Paper

Noncontact sensing of electric potential using electroluminescence effects
Author(s): DaeHwa Jeong; Ju-Hyeon Lee; Ick-June Yune; Sang-Hoon Chae; B. B. Bhattarai
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Paper Abstract

A new voltage sensing method has been tried using a n electro-luminescence effect. Optical images of the electric potential of conductive planar patterns could be obtained by this method. The brightness of the sensor surface is proportional to the voltage that is applied to the pattern electrode and the image is captured. By processing the image, defective part of the pattern electrode can be identified. This method is contact-free so that it can be applied to what is covered by an insulator layer. Also, we propose a driving method of the sensor that enables measuring DC voltages. This method may be applied to what is covered by an insulator layer. Also, we propose a driving method of the sensor that enables measuring DC voltages. This method may be applied to inspect the fine conductive patterns in non-contacting way during the fabrication process of display devices such as thin film transistor liquid crystal display panels.

Paper Details

Date Published: 4 October 2001
PDF: 8 pages
Proc. SPIE 4564, Optomechatronic Systems II, (4 October 2001); doi: 10.1117/12.444103
Show Author Affiliations
DaeHwa Jeong, LG Electronics, Inc. (South Korea)
Ju-Hyeon Lee, Sunmoon Univ. (South Korea)
Ick-June Yune, LG Electronics, Inc. (South Korea)
Sang-Hoon Chae, Sunmoon Univ. (South Korea)
B. B. Bhattarai, Sunmoon Univ. (South Korea)


Published in SPIE Proceedings Vol. 4564:
Optomechatronic Systems II
Hyungsuck Cho, Editor(s)

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