Lg Display Co., Ltd.

Korea University Research and Business Foundation

Seunghyun Sung

Minji Kim

Yongwoo Lee

Sungwook Ko

YoungWook Ha

Yuseon Kho

SeungRyull Park

Uihyeon Jeong

Sahn Nahm

Dae-Su Kim

Su-Hwan Go

Jae-Min Eum

Ho-Sung Shin

Compositions are disclosed that comprise a piezoelectric material according to Chemical Formula 1: (1−y)(NaK)(Nb,Sb)−ySrZrO+n mol % CuO, wherein 0.01≤y≤0.10, 0.4≤a≤0.6, 0≤x≤0.06, and 0.5≤n≤1.5. The compositions can further comprise a first material, and a second material surrounded by the first material. A piezoelectric device is also described, which includes a piezoelectric device layer including a composition of Chemical Formula 1, and having a first material layer and a second material layer surrounded by the first material layer; a first electrode part disposed on a first surface of the piezoelectric device layer; and a second electrode part disposed on a second surface facing the first surface.

Composition of piezoelectric material, method for fabricating the same, piezoelectric device, and display apparatus comprising piezoelectric device

A vibration device can include a vibration generator including a vibration portion, in which the vibration portion includes a plurality of inorganic portions having piezoelectric characteristics, the plurality of inorganic portions being spaced apart from each other; and an organic portion disposed between at least two inorganic portions among the plurality of inorganic portions, the organic portion having non-piezoelectric characteristics. The organic portion includes a first organic portion and a second organic portion, the first organic portion being disposed between one of the plurality of inorganic portions and the second organic portion. Further, an elastic modulus of the first organic portion is lower than an elastic modulus of the second organic portion.

Vibration device and apparatus including the same

Discussed is an apparatus including a display panel configured to display an image, a vibration apparatus disposed at a rear surface of the display panel to vibrate the display panel to generate sound, and an adhesive member and a connection member between the display panel and the vibration apparatus. The vibration apparatus can include a vibration portion, a first protection member disposed at a first surface of the vibration portion, and a second protection member disposed at a second surface of the vibration portion, the second surface of the vibration portion being different from the first surface of the vibration portion. The connection member can cover a front surface of the first protection member adjacent to the adhesive member.

Vibration apparatus and apparatus including the same

Discussed is an apparatus including a display panel configured to display an image, a vibration apparatus disposed at a rear surface of the display panel to vibrate the display panel and to generate sound via the display panel, and an adhesive member and a connection member between the display panel and the vibration apparatus.

Growing community of inventors

Paju-si, South Korea

Seunghyun Sung