Sound apparatus having vibration devices
A sound apparatus comprises a first vibration device which vibrates by an input driving signal, a first substrate including a first main surface and a second main surface facing each other, wherein the first vibration device is disposed on at least a portion of the first main surface of the first substrate, a second substrate including a first main surface and a second main surface facing each other, wherein a portion of the first main surface of the second substrate is disposed to be adjacent to a portion of the second main surface of the first substrate, a second vibration device disposed on at least a portion of the second main surface of the second substrate and vibrates by the input driving signal, a vibration member, a first elastic member connecting the first substrate and the vibration member, and a second elastic member connecting the first substrate and the vibration member.
1 . A sound apparatus, comprising:
a first vibration device configured to vibrate based on an input driving signal;
a first substrate having a first main surface and a second main surface opposite to the first main surface, wherein the first vibration device is disposed on the first main surface of the first substrate;
a second substrate having a first main surface and a second main surface opposite to the first main surface, wherein a portion of the first main surface of the second substrate is disposed to face a portion of the second main surface of the first substrate;
a second vibration device which is disposed on the second main surface of the second substrate and configured to vibrate based on the input driving signal;
a vibration member;
a first member configured to connect the second main surface of the first substrate to the vibration member; and
a second member configured to connect an edge portion of a rear surface of the second vibration device or the second main surface of the second substrate to the vibration member,
wherein:
the first member and the second member are made of different materials from the first substrate and the second substrate;
the rear surface of the second vibration device faces the vibration member; and
a central portion other than the edge portion among the rear surface of the second vibration device is not connected to the vibration member.
2 . The sound apparatus of claim 1 , wherein the first member is in contact with the second main surface of the first substrate.
3 . The sound apparatus of claim 1 , wherein the first member is disposed at an area where the first substrate and the first vibration device overlap on a plan view.
4 . The sound apparatus of claim 3 , wherein:
the first vibration device has a rectangular shape including a long side direction and a short side direction; and
an edge portion of one side of the first member is disposed at a position corresponding to an edge portion of the long side direction of the first vibration device.
5 . The sound apparatus of claim 1 , wherein the second vibration device is disposed on at least a portion of the second main surface of the second substrate, and
the second member is configured to connect the rear surface of the second vibration device to the vibration member.
6 . The sound apparatus of claim 1 , wherein;
the second vibration device is disposed on a portion of the second main surface of the second substrate; and
the second member is configured to connect the edge portion of the second main surface of the second substrate to the vibration member.
7 . The sound apparatus of claim 1 , wherein the first member and the second member are elastic members.
8 . The sound apparatus of claim 1 , wherein the first vibration device and the second vibration device vibrate by the same input driving signal.
9 . The sound apparatus of claim 8 , wherein;
a polarization direction of a vibration layer of the first vibration device is opposite to a polarization direction of a vibration layer of the second vibration device; and
an applied voltage of the vibration layer of the first vibration device is opposite to an applied voltage of the vibration layer of the second vibration device.
10 . The sound apparatus of claim 8 , wherein the first vibration device and the second vibration device are displaced in the same direction.
11 . The sound apparatus of claim 1 , wherein the second member is in contact with the rear surface of the second vibration device or the second main surface of the second substrate.
12 . The sound apparatus of claim 1 , wherein the second member is disposed at an area where the second substrate and the second vibration device overlap on a plan view.
13 . The sound apparatus of claim 12 , wherein;
the second vibration device has a rectangular shape including a long side direction and a short side direction; and
an edge portion of one side of the second member is disposed at a position corresponding to an edge portion of the long side direction of the second vibration device.
14 . The sound apparatus of claim 1 , wherein at least one of the first substrate and the second substrate includes stainless steel.
15 . The sound apparatus of claim 1 , wherein at least one of the first substrate and the second substrate has a thickness of 0.1 mm to 0.5 mm.
16 . The sound apparatus of claim 15 , wherein at least one of the first substrate and the second substrate has a thickness of 0.2 mm to 0.4 mm.
17 . The sound apparatus of claim 1 , wherein;
the first substrate and the first vibration device have a rectangular shape including a long side direction and a short side direction, and
a length of the long side direction of the first substrate is longer than or equal to a length of the long side direction of the first vibration device.
18 . The sound apparatus of claim 1 , wherein;
the second substrate and the second vibration device have a rectangular shape including a long side direction and a short side direction; and
a length of the long side direction of the second substrate is longer than or equal to a length of the long side direction of the second vibration device.
19 . The sound apparatus of claim 1 , wherein:
the first substrate, the first vibration device, the second substrate, and the second vibration device have a rectangular shape including a long side direction and a short side direction;
the long side direction of the first substrate and the long side direction of the first vibration device extend in a first direction;
the long side direction of the second substrate and the long side direction of the second vibration device extend in a second direction different from the first direction; and
the first substrate and the first vibration device intersect the second substrate and the second vibration device on a plan view.
20 . The sound apparatus of claim 1 , wherein;
the vibration member is a display panel of a display apparatus;
the display panel includes an image display surface on which an image is displayed, and rear surface confronting the image display surface; and
the vibration of the first vibration device and the second vibration device is transmitted to the rear surface of the display panel.
21 . The sound apparatus of claim 1 , wherein the first substrate and the second substrate are disposed to include a “+” shape on a plan view.
22 . The sound apparatus of claim 1 , wherein;
the vibration member includes at least one of a metal, resin, glass, hard paper, wood, rubber, plastic, fiber, cloth, paper, leather, or carbon; and
the vibration member includes a display panel configured to display an image.
23 . The sound apparatus of claim 1 , wherein the vibration member includes a screen panel on which an image is projected from a display apparatus, a lighting panel, a signage panel, a vehicular interior material, a vehicular glass window, a vehicular exterior material, a vehicular seat interior material, a building ceiling material, a building interior material, a building glass window, an aircraft interior material, an aircraft glass window, or a mirror.
24 . The sound apparatus of claim 1 , wherein;
the first member includes a plurality of first members; and
the second member includes a plurality of second members.