Abstract: An organic light emitting diode (OLED) includes an emissive layer with at least one emitting part includes at least one emitting material layer, a first electron transport layer and a second electron transport layer disposed sequentially between two facing electrodes, wherein the first electron transport layer includes a first electron transporting material of a benzimidazole-based compound substituted with at least one spiro-structured fluorenyl group and the second electron transport layer includes a second electron transporting material of a benzimidazole-based compound substituted with at least one anthracenyl group. The first electron transport including the first electron transport material with excellent thermal stability is disposed adjacently to the emitting material layer so that the OLED can maintain good luminescent intensity in an environment of high temperature and implement beneficial luminous properties.

Abstract: Provided is an input device. The input device includes a piezoelectric vibration member; a frame disposed to contact at least one area of the piezoelectric vibration member; and a connection member disposed on one surface of the piezoelectric vibration member. The piezoelectric vibration member detects a pressure applied from the outside to generate a voltage and is vibrated in accordance with a signal applied from an external device.

Abstract: Disclosed is a touch screen apparatus including a frame, a touch screen panel provided inside the frame, and a piezoelectric vibration member provided between the frame and the touch screen panel, wherein the piezoelectric vibration member vibrates in a horizontal direction of the touch screen.

Abstract: Provided is a complex device including: a frame in which a predetermined space is provided; a vibration member provided in the frame and generating vibration; and a speaker provided in the frame and generating a sound.

Abstract: Provided is a piezoelectric vibrating module including a case provided therein with a predetermined space, a piezoelectric vibrating member provided in the case, vibrating according to an applied voltage, and including a piezoelectric element; a weight member provided in the case and provided to be in contact with a portion of the piezoelectric vibrating member; and at least one fixing member provided in one region of the piezoelectric vibrating member to contact and fix the weight member.