Patent ID: 11924609
Assignee: LG DISPLAY CO., LTD.
Field: Computer technology (Electrical engineering)
Classification: CPC G  H | IPC G  H

Claim 25:
26. An apparatus, comprising: a vibration plate comprising a first area and a second area; a housing module comprising a roller configured to allow the vibration plate to be rolled-up therein; a rolling module comprising a structure connected to the vibration plate, the rolling module being configured to unroll the vibration plate in accordance with unfolding of the structure by rotation of the roller; and a plurality of vibration modules on a rear surface of the vibration plate, the plurality of vibration modules being configured to: be rolled or unrolled with the vibration plate; and vibrate the first area and the second area of the vibration plate in an unrolled state to generate sound, wherein each of the plurality of vibration modules comprises: a plurality of first portions having a piezoelectric property, and a plurality of second portions configured to connect between a lateral side surface of each of two first portions adjacent to each other of the plurality of first portions along a first direction parallel to a rear surface of the vibration plate, the plurality of second portions including an organic material, wherein the plurality of first portions and the plurality of second portions are disposed in parallel along the first direction, and wherein the plurality of first portions and the plurality of second portions are configured to vibrate the vibration plate.