Yonsei University

Eui Hyuk Kim

Cheolmin Park

Jong Sung Kim

Chanho Park

Woo Kyoung Jin

Sung Hwan Cho

The present invention relates to a liquid information sensor comprises at least more than one electrode set including a first electrode, and a second electrode which is disposed spaced apart from the first electrode and to which an alternating current signal is applied between the first electrode and the second electrode; and a ferroelectric layer including a first side in contact with the first electrode and the second electrode and a second side facing the first side and defining a receiving area for receiving the target liquid, and generating sound waves by physical vibration when the AC signal is applied.

Liquid information sensor and method of driving the same

A light-emitting device according to the present invention comprises, an electrode unit including a first electrode and a second electrode spaced apart from each other, with electrical signals having different polarity applying the first and second electrode, respectively; a first stimulation unit disposed on one surface of the electrode unit and having a first stimulation reaction layer expressing variable luminance according to a first stimulation; and a second stimulation unit disposed on the other surface facing the one surface of the electrode unit, and having a second stimulation reaction layer expressing a variable luminance according to a second stimulation different from the first stimulation.

Light-emitting device

Provided are an AC electroluminescence device includes a bottom electrode including a first electrode and a second electrode apart from each other, wherein AC power is applied between the first electrode and the second electrode; an electron injecting layer disposed on the bottom electrode; an emission layer disposed on the electron injecting layer; a dielectric layer disposed on the emission layer; a top electrode, which is disposed on the dielectric layer and includes a first portion opposing the first electrode and a second portion opposing the second electrode; a first emission region defined by a first overlapping region of the emission layer between the first portion of the top electrode and the first electrode of the bottom electrode; and a second emission region defined by a second overlapping region of the emission layer between the second portion of the top electrode and the second electrode of the bottom electrode.

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Seoul, South Korea

Eui Hyuk Kim