Lg Chem, Ltd

Hyun-Seok Choi

Sang-hyun Park

Su-Rim Lee

Yeon-Keun Lee

Jung-Doo Kim

In-Seok Hwang

Dong-wook Lee

Seung-Wook Kim

Dong-Wook Lee

Sang-Hyun Park

Disclosed are a light guide plate for a non-contact type coordinate input system, a system including the same, and a non-contact type coordinate input method using the same. More particularly, the present invention relates to a light guide plate for a non-contact type coordinate input system, which eliminates inconvenience of a conventional contact-type coordinate input system inputting coordinates through direct contact, and which can reduce use of sensors and optical loss as much as possible. The present invention also relates to a system including the same, and a non-contact type coordinate input method using the same.

Light guide plate for system inputting coordinate contactlessly, a system comprising the same and a method for inputting coordinate contactlessly using the same

Disclosed herein is a PDP filter having a laminated structure of a transparent conductive film type electromagnetic wave-shielding layer and one or more other functional layers, in which at least two edge portions of the surface of the transparent conductive film type electromagnetic wave-shielding layer, which is in contact with the functional layer, are not exposed outside the laminated structure of the PDP filter.

PDP filter and manufacturing method thereof

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Daejeon, South Korea

Hyun-Seok Choi