Display device

Patent metadata

Field	Value
Publication number	US-12535909-B2
Application number	US-202418949432-A
Country	US
Kind code	B2
Filing date	Nov 15, 2024
Priority date	Feb 26, 2024
Publication date	Jan 27, 2026
Grant date	Jan 27, 2026

Abstract

A display device can include a display panel having a first display area and a second display area, a back plate coupled to a rear surface of the display panel, a first vibration generator disposed in a first back plate area, a second vibration generator disposed in a second back plate area, a plurality of receivers disposed on the back plate, and a touch circuit determining a position of a touch object from a reception vibration signal detected by the plurality of receivers.

First claim

What is claimed is:

1 . A display device, comprising:
a display panel including a first display area and a second display area; a back plate including a first back plate area corresponding to the first display area and a second back plate area corresponding to the second display area, the black plate being coupled to a rear surface of the display panel; a first vibration generator disposed in the first back plate area and configured to vibrate according to a first vibration signal obtained by synthesizing a first sound signal and a first touch driving signal; a second vibration generator disposed in the second back plate area and configured to vibrate according to a second vibration signal obtained by synthesizing a second sound signal and a second touch driving signal; a plurality of first receivers disposed in the first back plate area to detect the first vibration signal; a plurality of second receivers disposed in the second back plate area to detect the second vibration signal; and a touch circuit configured to determine a position of a touch object from a reception vibration signal detected by the plurality of first receivers and the plurality of second receivers.

2 . The display device of claim 1 , wherein the first back plate area and the second back plate area are divided by a partition member disposed on the back plate.

3 . The display device of claim 1 , wherein the first vibration generator or the second vibration generator is inserted into a through hole formed in the back plate.

4 . The display device of claim 3 , wherein the first vibration generator or the second vibration generator transfers vibration to the display panel through a vibration transmission member.

5 . The display device of claim 1 , wherein the first vibration generator is disposed in a center part of the first back plate area, and the second vibration generator is disposed in a center part of the second back plate area.

6 . The display device of claim 1 , wherein the plurality of first receivers or the plurality of second receivers are inserted into a through hole formed in the back plate.

7 . The display device of claim 1 , wherein the plurality of first receivers are disposed outside of the first back plate area, and the plurality of second receivers are disposed outside of the second back plate area.

8 . The display device of claim 1 , wherein the first sound signal and the second sound signal have a same frequency.

9 . The display device of claim 1 , wherein the first touch driving signal and the second touch driving signal have a same frequency.

10 . The display device of claim 1 , wherein the first touch driving signal and the second touch driving signal have different frequencies.

11 . The display device of claim 1 , wherein the touch circuit includes:
a touch driving circuit including a synthesizer configured to generate a vibration signal by synthesizing a sound signal and a touch driving signal; a touch sensing circuit including a frequency filter configured to separate the first or second touch driving signal from the reception vibration signal; and a touch controller configured to control the touch driving circuit and the touch sensing circuit.

12 . The display device of claim 1 , wherein each of the first vibration generator and the second vibration generator is a sound actuator, a sound exciter, or a piezoelectric element.

13 . The display device of claim 1 , wherein the sound signal has a frequency band of 20 Hz to 20 KHz, and the touch driving signal has a frequency band between 200 KHz and 400 KHz.

14 . A display device, comprising:
a display panel including a first display area and a second display area; a back plate including a first back plate area corresponding to the first display area and a second back k plate area corresponding to the second display area, the back plate being coupled to a rear surface of the display panel; a plurality of first vibration generators disposed in the first back plate area and configured to vibrate according to a first vibration signal obtained by synthesizing a first sound signal and a first touch driving signal; a plurality of second vibration generators disposed in the second back plate area and configured to vibrate according to a second vibration signal obtained by synthesizing a second sound signal and a second touch driving signal; a plurality of first receivers disposed in the first back plate area to detect the first vibration signal; a plurality of second receivers disposed in the second back plate area to detect the second vibration signal; and a touch circuit configured to determine a position of a touch object from a reception vibration signal detected by the plurality of first receivers and the plurality of second receivers.

15 . The display device of claim 14 , wherein the plurality of first vibration generators include:
a plurality of 1-1th vibration generators configured to vibrate according to a 1-1th vibration signal obtained by synthesizing the first sound signal and a 1-1th touch driving signal; and a 1-2th vibration generator configured to vibrate according to a 1-2th vibration signal obtained by synthesizing the first sound signal and a 1-2th touch driving signal.

16 . The display device of claim 14 , wherein the plurality of second vibration generators include:
a plurality of 2-1th vibration generators configured to vibrate according to a 2-1th h vibration signal obtained by synthesizing the second sound signal and a 2-1th touch driving signal; and a 2-2th vibration generator configured to vibrate according to a 2-2th vibration signal obtained by synthesizing the second sound signal and a 2-2th touch driving signal.

17 . A display device, comprising:
a display panel including a first display area and a second display area; a back plate coupled to a rear surface of the display panel; a first vibration generator disposed in a first back plate area; a second vibration generator disposed in a second back plate area; a plurality of receivers disposed on the back plate; and a touch circuit configured to determine a position of a touch object from a reception vibration signal detected by the plurality of receivers.

18 . The display device of claim 17 , wherein the first vibration generator vibrates according to a first vibration signal obtained by synthesizing a first sound signal and a first touch driving signal.

19 . The display device of claim 18 , wherein the second vibration generator vibrates according to a second vibration signal obtained by synthesizing a second sound signal and a second touch driving signal.

20 . The display device of claim 17 , wherein the plurality of receivers include:
a plurality of first receivers disposed outside of the first back plate area; and a plurality of second receivers disposed outside of the second back plate area.

Assignees

• Lg Display Co Ltd

Inventors

• Jo Jungho
• Kim Sungchul
• Kim Sangkyu
• Gong Namyong
• Lee Hwideuk
• Lee Deuksu
• Kim Hoonbae

Classifications

• H04R2499/15

  Transducers incorporated in visual displaying devices, e.g. televisions, computer displays, laptops · CPC title

• H04R1/025

  Arrangements for fixing loudspeaker transducers, e.g. in a box, furniture · CPC title

• G06F3/0416 Primary

  Control or interface arrangements specially adapted for digitisers · CPC title

• H10K59/87

  Passivation; Containers; Encapsulations · CPC title

• H10K59/40

  OLEDs integrated with touch screens · CPC title