Display device unit

Abstract

A display device unit includes: a display device; and a sound element disposed at a side surface or a rear surface of the display device, where the sound element includes a vibration material layer which provides a sound based on an electric field applied therein, and a pair of electrodes which generates the electric field in the vibration material layer.

What is claimed is: 
     
       1. A display device unit comprising:
 a display device;   a sound element disposed at a side surface or a rear surface of the display device;   a vibration plate disposed between the display device and the sound element; and   a back chassis disposed at a rear surface of the display device, and comprising a fixing protrusion which protrudes toward the rear surface of the display device,   wherein the sound element comprises:   a vibration material layer which generates a sound based on an electric field applied therein, and   a pair of electrodes which generate the electric field in the vibration material layer, and   wherein the fixing protrusion is formed integrally with the back chassis and of the same material as that of the back chassis, and   wherein the sound element is disposed between the fixing protrusion and the vibration plate and the fixing protrusion overlaps a center of the sound element and contacts one of the electrodes of the sound element such that the fixing protrusion effectively prevents the sound element from being displaced by vibration.   
     
     
       2. The display device unit of  claim 1 , further comprising:
 a first spacer disposed between the sound element and the vibration plate.   
     
     
       3. The display device unit of  claim 2 , further comprising:
 a second spacer attached between the sound element and the back chassis.   
     
     
       4. The display device unit of  claim 2 , wherein
 the sound element is provided as a pair.   
     
     
       5. The display device unit of  claim 1 , further comprising:
 a window disposed on a front surface of the display device.   
     
     
       6. The display device unit of  claim 1 , further comprising:
 a receiver disposed at the side surface of the display device and an inner surface of the window,   wherein the receiver comprises the sound element and generates the sound.   
     
     
       7. The display device unit of  claim 6 , wherein
 an opening exposing the receiver is not defined in the window.   
     
     
       8. The display device unit of  claim 1 , wherein
 the vibration material layer of the sound element generates a vibration of a frequency outside an audible frequency, and   a haptic function the display device unit uses a change of the frequency of the vibration of the vibration material layer by a touch of a user.   
     
     
       9. A display device unit comprising:
 a display device;   a back chassis disposed at a rear surface of the display device and comprising a first vibration space and a protrusion protruding from the first vibration space toward an outside of the display device;   a first sound element at least a portion of which is disposed inside of the first vibration space; and   a first adhesive adhering the rear surface of the display device and the back chassis,   wherein a rear surface of the back chassis includes a protrusion structure formed by the protrusion,   the first adhesive is disposed between the first sound element and edges of the display device in a plan view,   the first adhesive overlaps a display panel of the display device in the plan view, and   a width of the protrusion is smaller than a gap between the protrusion and the first adhesive in the plan view.   
     
     
       10. The display device unit of claim 9, wherein
 the back chassis further comprises a flat surface, which is parallel to the rear surface of the display device, and   the first adhesive is disposed between the rear surface of the display device and the flat surface of the back chassis.   
     
     
       11. The display device unit of claim 10, wherein
 the first adhesive is disposed along a boundary of the first vibration space.   
     
     
       12. The display device unit of claim 10, wherein:
 the first adhesive comprises at least two first adhesives that are disposed respectively near a boundary of the first vibration space.   
     
     
       13. The display device unit of claim 9, wherein:
 the first adhesive and the back chassis define the first vibration space where the first sound element vibrates.   
     
     
       14. The display device unit of claim 9, further comprising:
 a window disposed on a front surface of the display device.   
     
     
       15. The display device unit of claim 9, wherein
 the first sound element comprises:   a vibration material layer which generates a sound based on an electric field applied therein, and   a pair of electrodes which generate the electric field in the vibration material layer.   
     
     
       16. The display device unit of claim 9, further comprising:
 a second sound element disposed inside of the back chassis, and   wherein the back chassis further comprises a second vibration space, and   the second sound element is disposed inside of the second vibration space.   
     
     
       17. The display device unit of claim 16, further comprising:
 a second adhesive adhering the rear surface of the display device and the back chassis,   wherein the second adhesive is disposed near the second vibration space.   
     
     
       18. The display device unit of claim 17, wherein
 the second adhesive is disposed along a boundary of the second vibration space.   
     
     
       19. The display device unit of claim 17, wherein:
 the second adhesive comprises at least two second adhesives that are disposed respectively near a boundary of the second vibration space.   
     
     
       20. The display device unit of claim 16, wherein
 the first sound element is disposed in a left half of the back chassis, and   the second sound element is disposed in a right half of the back chassis.   
     
     
       21. The display device unit of claim 16, further comprising:
 another adhesive disposed between the back chassis and the first or the second sound element to attach the first or the second sound element inside of the back chassis.   
     
     
       22. The display device unit of claim 16, wherein
 the first and the second sound elements comprise:   a vibration material layer which generates a sound based on an electric field applied therein, and   a pair of electrodes which generate the electric field in the vibration material layer.   
     
     
       23. The display device unit of claim 17, wherein:
 the second adhesive and the back chassis define the second vibration space where the second sound element vibrates.   
     
     
       24. The display device unit of claim 16, wherein
 the first and second vibration spaces are formed integrally with the back chassis and of the same material as that of the back chassis.   
     
     
       25. The display device unit of claim 16, further comprising:
 a third adhesive disposed between the back chassis and the first sound element to attach the first sound element inside of the back chassis.   
     
     
       26. The display device unit of claim 25, further comprising:
 a fourth adhesive disposed between the back chassis and the second sound element to attach the second sound element inside of the back chassis.   
     
     
       27. The display device unit of claim 16, further comprising:
 a window disposed on a front surface of the display device.   
     
     
       28. The display device unit of claim 22, wherein
 the vibration material layer of the sound element generates a vibration of a frequency outside an audible frequency, and   a haptic function the display device unit uses a change of the frequency of the vibration of the vibration material layer by a touch of a user.