Directional speaker and display apparatus having the same

1. A directional speaker comprising:

a driver configured to generate a sound;

a guide tube having a first end at a side at which the driver is provided and a second end opposite to the first end, the guide tube being configured to guide the sound generated by the driver and received via the first end, wherein the guide tube comprises a plurality of sound radiation holes; and

a throat tube disposed between the driver and the guide tube,

wherein an inside of the guide tube has cross-sectional areas that decrease in a direction from the first end of the guide tube toward the second end of the guide tube,

wherein the plurality of sound radiation holes have sizes changing in the direction from the first end of the guide tube toward the second end of the guide tube, and

wherein an inside of the throat tube has cross-sectional areas that increase in a direction from the driver toward the first end of the guide tube.

2. The directional speaker according to claim 1 , wherein intervals between the plurality of sound radiation holes decrease in the direction from the first end of the guide tube toward the second end of the guide tube.

3. The directional speaker according to claim 1 , wherein the plurality of sound radiation holes are aligned at regular intervals.

4. The directional speaker according to claim 1 ,

wherein the throat tube has a throat portion adjacent to the driver and having a smaller width than an adjacent portion of the throat tube.

5. The directional speaker according to claim 1 , further comprising:

a cap configured to cover the second end of the guide tube,

wherein the cap has a groove in a V-shape on an inner surface facing the second end of the guide tube to allow sounds that reach the groove to destructively interfere with each other.

6. The directional speaker according to claim 5 , further comprising a sound absorbing material on the inner surface of the cap facing the second end of the guide tube.

7. The directional speaker according to claim 1 , wherein the plurality of sound radiation holes have sizes increasing in the direction from the first end of the guide tube toward the second end of the guide tube.

8. A display apparatus comprising:

a display; and

a speaker disposed behind the display, wherein the speaker comprises:

a driver configured to generate a sound,

a guide tube having a first end at a side at which the driver is provided and a second end opposite to the first end, the guide tube being configured to guide the sound generated by the driver and received via the first end,

a throat tube disposed between the driver and the guide tube, and

wherein the guide tube comprises a plurality of sound radiation holes that have sizes changing in a direction from the first end of the guide tube toward the second end of the guide tube, and

wherein an inside of the throat tube has cross-sectional areas that increase in a direction from the driver toward the first end of the guide tube.

9. The display apparatus according to claim 8 , wherein:

the guide tube extends horizontally on the display; and

the plurality of sound radiation holes are on an upper surface of the guide tube.

10. The display apparatus according to claim 8 , wherein an inside of the guide tube has cross-sectional areas that decrease in the direction from the first end of the guide tube toward the second end of the guide tube.

11. The display apparatus according to claim 10 , wherein a first surface of the guide tube, on which the plurality of sound radiation holes is linearly aligned, is at an acute angle relative to a lengthwise direction of the guide tube.

12. The display apparatus according to claim 8 , wherein intervals between the plurality of sound radiation holes change in the direction from the first end of the guide tube toward the second end of the guide tube.

13. The display apparatus according to claim 8 , wherein the plurality of sound radiation holes are arranged on a first surface of the guide tube at regular intervals.

14. The display apparatus according to claim 8 ,

wherein the throat tube has a throat portion adjacent to the driver and having a smaller width than an adjacent portion of the throat tube.

15. The display apparatus according to claim 8 , wherein the speaker further comprises a cap configured to cover the second end of the guide tube.

16. The display apparatus according to claim 15 , wherein the cap has a groove in a V-shape on an inner surface facing the second end of the guide tube to allow sounds that reach the groove to destructively interfere with each other.

17. The display apparatus according to claim 15 , wherein the speaker further comprises a sound absorbing material on an inner surface of the cap facing the second end of the guide tube.

18. A display apparatus comprising:

a display;

a pair of first speakers disposed at upper portions of the display opposite to each other; and

a pair of second speakers disposed at side portions of the display opposite to each other,

wherein each of the pair of first speakers and each of the pair of second speakers comprises:

a driver configured to generate a sound,

a guide tube having a first end at a side at which the driver is provided and a second end opposite to the first end, the guide tube being configured to guide the sound generated by the driver and received via the first end, and

a throat tube disposed between the driver and the guide tube,

wherein the guide tubes respectively comprised in the pair of first speakers comprise a plurality of sound radiation holes linearly aligned on an upper surface thereof,

wherein the guide tubes respectively comprised in the pair of second speakers comprise a plurality of sound radiation holes linearly aligned on a side surface thereof,

wherein the guide tubes respectively comprised in the pair of first speakers are aligned in a direction perpendicular to an alignment direction of the guide tubes respectively comprised in the pair of second speakers,

wherein the plurality of sound radiation holes respectively comprised in each of the guide tubes have sizes changing in a direction from the first end of the guide tube toward the second end of the guide tube, and

wherein an inside of the throat tube has cross-sectional areas that increase in a direction from the driver toward the first end of the guide tube.