Lg Innotek Co., Ltd.

Do Hee Keum

Beom Sun Hong

Yong Jae Choi

Gyu Lin Lee

A mask according to an embodiment comprises: a first substrate; a first wiring arranged on the first substrate; a plurality of piezoelectric elements arranged on the first wiring; a second wiring arranged on the piezoelectric elements; a second substrate arranged on the second wiring; a third wiring arranged on the first substrate and electrically insulated from the first wiring; and a plurality of light-emitting elements arranged between the first and second substrates and arranged on the third wiring, wherein the plurality of light-emitting elements are arranged in areas overlapping, in a vertical direction, areas between the piezoelectric elements.

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Do Hee Keum