IP Library › Granted Patent US 11,678,121

Granted Patent B2

US 11,678,121 · App. 17/153,584 · Granted Jun 13, 2023

Display device

Inventors: Byeong Hee Won (Incheon, KR); Jae Woo Im (Seoul, KR); Ji Yeon Seo (Hwaseong-si, KR)

H04R7/045 H01L27/3225 H01L27/3276 H01L51/529 H01L51/5246 H04R1/028 H04R9/025 H04R9/045 H04R9/06 H04R17/00 H05K1/147 G09G3/3208 G09G2310/08 H01L41/09 H01L41/1876 H01L41/193 H04R2499/15 H05K2201/056 H05K2201/10083 H05K2201/10128 H05K2201/10356

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Quick Facts

Patent No.: US 11,678,121
App. No.: 17/153,584
Granted: Jun 13, 2023
Kind: B2

External Links

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Abstract

A display device includes: a display panel including a first substrate, a second substrate, and a light emitting element layer disposed between the first substrate and the second substrate, where the light emitting element outputs light to the second substrate; a first sound generator disposed on a surface of the first substrate, where the first sound generator vibrates the display panel to output a sound; and a first buffer member disposed on the surface of the first substrate, where a height of the first buffer member is less than a height of the first sound generator.

Claims (60)

1. A display device comprising:

a display panel including a light emitting device layer disposed on a first surface of a substrate and configured to emit light;

a lower cover disposed on a second surface opposite to the first surface of the substrate;

a first sound generator connected to the display panel and the lower cover, and configured to vibrate the display panel to output sound; and

a first buffer member disposed on the second surface of the substrate,

wherein a height of the first buffer member is less than a gap between the substrate and the lower cover, and

wherein a length of the first buffer member in a thickness direction of the substrate is less than a length of the first sound generator in the thickness direction of the substrate.

2. The display device of claim 1 , wherein the first buffer member is attached to a first surface of the lower cover facing the second surface of the substrate.

3. The display device of claim 1 , wherein the first buffer member is attached to the second surface of the substrate.

4. The display device of claim 1 , wherein the lower cover includes a first hole overlapping the first sound generator.

5. The display device of claim 1 , further comprising: a blocking member between the substrate and the lower cover,

wherein a height of the blocking member is greater than a height of the first buffer member.

6. The display device of claim 1 , wherein the first sound generator includes:

a bobbin disposed on one surface of the substrate;

a voice coil surrounding the bobbin;

a magnet spaced apart from the bobbin; and

a lower plate disposed on the magnet and combined with the lower cover by a fixing member.

7. The display device of claim 4 , further comprising a second sound generator disposed on the first surface of the substrate,

wherein the second sound generator includes:

a first electrode to which a first driving voltage is applied;

a second electrode to which a second driving voltage is applied; And

a vibration layer between the first electrode and the second electrode and having a piezoelectric element that contracts or expands according to a first driving voltage applied to the first electrode and a second driving voltage applied to the second electrode.

8. A display device comprising:

a display panel including a light emitting device layer disposed on a first surface of a substrate and configured to emit light;

a lower cover disposed on a second surface opposite to the first surface of the substrate;

a first sound generator connected to the display panel and the lower cover, and configured to vibrate the display panel to output sound;

a first buffer member disposed on the second surface of the substrate; and

a sound circuit board connected to a second sound generator,

wherein the lower cover includes a first hole overlapping the first sound generator, and a second hole penetrating the lower cover, and

wherein the sound circuit board is disposed in the second hole, and

wherein the size of the first hole is greater than the size of the second hole.

9. The display device of claim 8 , further comprising:

the second sound generator disposed on the first surface of the substrate;

a circuit board disposed on a second surface opposite to a first surface of the lower cover; and

a sound driving circuit disposed on a first surface of the circuit board, and configured to output a sound signal to the second sound generator,

wherein the sound circuit board is electrically connected to the sound driving circuit.

10. The display device of claim 9 , further comprising a timing control circuit disposed on the circuit board and configured to control a driving timing of the display panel.

11. The display device of claim 9 , further comprising a source circuit board disposed on a second surface of the lower cover opposite to the first surface of the lower cover; and

a cable disposed on the second surface of the lower cover and connecting the circuit board and the source circuit board.

12. The display device of claim 1 , further comprising an adhesive member attached to an edge of the lower cover.

13. The display device of claim 12 , wherein the adhesive member is attached to the other surface of the substrate.

14. The display device of claim 12 , wherein the adhesive member is apart from the buffer member.

15. A display device comprising:

a display panel including a light emitting device layer disposed on a first surface of a substrate and configured to emit light;

a circuit board disposed on a second surface opposite to the first surface of the substrate;

a first sound generator connected to the display panel and the circuit board and configured to vibrate the display panel to output sound; and

a buffer member disposed on a first surface of the circuit board facing the second surface of the substrate,

wherein a height of the buffer member is less than a gap between the substrate and the lower cover.

16. The display device of claim 15 , further comprising:

a timing control circuit disposed on the second surface opposite to the first surface of the circuit board and configured to control a driving timing of the display panel; and

a sound driving circuit disposed on the second surface of the circuit board and configured to output a first sound signal to the first sound generator.

17. The display device of claim 16 , further comprising:

a lower cover disposed on the second surface of the substrate; and

a fixing member fixing the circuit board to the lower cover.

18. The display device of claim 17 , wherein a distance between the substrate and the lower cover is less than a distance between the substrate and the circuit board.

19. The display device of claim 17 , further comprising:

a source circuit board disposed on the second surface of the substrate; and

a cable connecting the circuit board and the source circuit board.

20. The display device of claim 19 , wherein the lower cover includes a first hole overlapping the first sound generator and a second hole through which the cable passes,

wherein the size of the first hole is greater than the size of the second hole.

Priority Claims (1)

KR 10-2019-0011741 · Jan 30, 2019 · national

Continuity (2)

Continuation 16688730 · Nov 19, 2019

Related Publication 20210144480A1 · May 13, 2021