Blocking element and display device including the same

A display device comprising:

• a display panel comprising a substrate including a first side extending in a first direction and a second side extending in a second direction intersecting the first direction, and a light emitting element layer positioned on a first surface of the substrate;
• a first vibrating element disposed on a second surface of the substrate and that vibrates the display panel to output a first sound;
• a second vibrating element disposed on the second surface of the substrate and that vibrates the display panel to output a second sound;
• a first buffer layer extending in the first direction and disposed between the first side and the first vibrating element and between the first side and the second vibrating element;
• a second buffer layer extending in the second direction and disposed between the second side and the first vibrating element and between the second side and the second vibrating element;
• and
• a third buffer layer comprising a first portion, a second portion, and a third portion, wherein
• the first portion of the third buffer layer extends in the first direction and is disposed between the first vibrating element and the first side and between the second vibrating element and the first side,
• the second portion and the third portion of the third buffer layer extend from the first portion in the second direction and are disposed between the first vibrating element and the second vibrating element, and
• diameters of a first pore comprised in the first buffer layer, a second pore comprised in the second buffer layer, and a third pore comprised in the third buffer layer are different from each other.

A blocking element comprising a buffer layer comprising a pore,

• wherein the buffer layer satisfies the following Eq. (1):
• 1014<C<1565 (1)
• where C is a sound propagation coefficient of the buffer layer, and has a unit of cm/s, and the C satisfies the following Eq. (2):
• C
• =
• CFD
• ρ
• s
• (
• 2
• )
• where CFD is a load value received by the buffer layer in case that a thickness of the buffer layer is compressed by 25%, and has a unit of gf/cm2, the ρs is an estimated density of the buffer layer, which is estimated from a diameter of the pore comprised in the buffer layer, and has a unit of g/cm3, and the ρs satisfies the following Eq. (3):
• ρ
• s
• =
• 328.17
• -
• c
• s
• 528.81
• (
• 3
• )
• where cs is the diameter of the pore comprised in the buffer layer, and has a unit of μm.