Display apparatus
A display apparatus according to an embodiment of the present disclosure includes a thin plate-shaped display cell that displays image and a plurality of exciters disposed on a back surface of the display cell and causing the display cell to vibrate. The plurality of exciters is such configured that the plurality of exciters is regarded as one exciter when the plurality of exciters generates vibration in the display cell.
1. A display apparatus comprising:
a thin plate-shaped display cell that displays images; and
a plurality of exciters that are disposed on side of a hack surface of the display cell and causes the display cell to vibrate; wherein
the plurality of exciters each comprises a group of minute exciters, and each group of minute exciters comprises at least two minute exciters that are adjacent to each other and are on the same side of the display cell in a right-left direction when the display cell is viewed from the back surface, wherein the at least two minute exciters comprise respective planar coils mounted on a shared circuit board and respective permanent magnets supported by a shared support substrate, and wherein for each group of minute exciters the at least two minute exciters are configured to be provided a substantially same signal and cause the at least two minute exciters to be regarded as one exciter when the at least two minute exciters generate vibration in the display cell.
2. The display apparatus according to claim 1 , wherein
the display cell includes a glass substrate; and
each of the plurality of exciters is able to vibrate the display cell independently of each other and is disposed in a region a maximum width of which is less than or equal to a half wavelength of 20 kHz.
3. The display apparatus according to claim 2 , wherein the exciters each have a housing made by die-casting.
4. The display apparatus according to claim 3 , further comprising:
a counter plate that is disposed to face the display cell with a predetermined gap provided therebetween, wherein
in each of the exciters, the housing is fixed to the counter plate.
5. The display apparatus according to claim 3 , wherein in each of the exciters, the housing is fixed to a position that is different from a position facing the exciter, with respect to the back surface of the display cell.
6. The display apparatus according to claim 1 , wherein:
the planar coils are fixed to the back surface of the display cell; and
the permanent magnets are disposed to face the plurality of planar coils with a predetermined gap provided therebetween.
7. The display apparatus according to claim 6 , wherein
the printed circuit board is fixed to the back surface of the display cell, and
in the respective exciters, the planar coils are formed on a surface opposite to the display cell of the printed circuit board.
8. The display apparatus according to claim 1 , further comprising one or more heat dissipation sheets between the display cell and the respective exciters.
9. The display apparatus according to claim 8 , wherein the one or more heat dissipation sheets are configured by an aluminum alloy.