US 12,470,865 B2
Blocking element and display device including the same
Hidekazu Hayashi, Yongin-si (KR); Kyoung Ho Park, Yongin-si (KR); Hyun Su Park, Yongin-si (KR); Ki Cheol Song, Yongin-si (KR); Taek Sun Shin, Yongin-si (KR); Tae Hee Yoon, Yongin-si (KR); and Gyu Su Lee, Yongin-si (KR)
Assigned to SAMSUNG DISPLAY CO., LTD., Yongin-si (KR)
Filed by Samsung Display Co., LTD., Yongin-si (KR)
Filed on Mar. 29, 2023, as Appl. No. 18/192,166.
Claims priority of application No. 10-2022-0075222 (KR), filed on Jun. 21, 2022.
Prior Publication US 2023/0412972 A1, Dec. 21, 2023
Int. Cl. H04R 1/28 (2006.01); H04R 1/02 (2006.01); H04R 7/04 (2006.01); H04R 9/02 (2006.01); H04R 9/04 (2006.01); H04R 9/06 (2006.01)
CPC H04R 1/288 (2013.01) [H04R 1/028 (2013.01); H04R 7/04 (2013.01); H04R 9/025 (2013.01); H04R 9/046 (2013.01); H04R 9/06 (2013.01); H04R 2499/15 (2013.01)] 14 Claims
OG exemplary drawing
 
1. 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 first buffer layer disposed on the second surface of the substrate and disposed between the first side and the first vibrating element; and
a second buffer layer disposed on the second surface of the substrate and disposed between the second side and the first vibrating element, wherein
the first buffer layer comprises a first pore, and the second buffer layer comprises a second pore, and
a first sound propagation coefficient value of the first buffer layer and a second sound propagation coefficient value of the second buffer layer satisfy the following Eq. (1):
1014<C<1565  (1)
where C is the sound propagation coefficient of the first buffer layer and the second buffer layer, and has a unit of cm/s, and the C satisfies the following Eq. (2):

OG Complex Work Unit Math
where CFD is a load value received by the first buffer layer and the second buffer layer in case that a thickness of the first buffer layer and the second buffer layer is compressed by 25%, and has a unit of gf/cm2, the ρs is an estimated density of the first buffer layer and the second buffer layer, which is estimated from diameters of the first pore comprised in the first buffer layer and the second pore comprised in the second buffer layer, and has a unit of g/cm3, and the ρs satisfies the following Eq. (3):

OG Complex Work Unit Math
where cs is the diameter of the first pore comprised in the first buffer layer and the diameter of the second pore comprised in the second buffer layer, and has a unit of μm.