CN-114762358-B - Display device

Abstract

The present disclosure relates to a display device including a piezoelectric film type actuator, the display device having a structure in which a groove is provided in a rear surface of a metal layer for supporting and packaging a rear surface of a display panel, and the piezoelectric film type actuator is provided in the groove. Accordingly, the display device can reduce the total thickness and improve the heat dissipation performance.

Inventors

• Cui Zaigao
• FANG XIXI

Assignees

• 乐金显示有限公司

Dates

Publication Date

20260512

Application Date

20210517

Priority Date

20201016

Claims (20)

1. 1. A display device, the display device comprising: A metal layer having a rear surface with at least one recess disposed therein; A display panel disposed on a front surface of the metal layer, wherein the entire front surface of the metal layer is attached to the entire rear surface of the display panel via an adhesive layer, and the metal layer is used as a heat sink; A piezoelectric film type actuator provided in the groove of the metal layer, the front and side surfaces of the piezoelectric film type actuator being surrounded by the inner surface of the metal layer in the groove, and And a housing provided to cover a rear surface of the piezoelectric film type actuator.
2. 2. The display device according to claim 1, wherein a size of the piezoelectric film type actuator is smaller than a size of the groove, and The housing covers a rear surface and a side surface of the piezoelectric film type actuator.
3. 3. The display device according to claim 1, further comprising a driver configured to drive the piezoelectric film type actuator, and provided in another region other than a region in which the groove is provided in the rear surface of the metal layer.
4. 4. The display device according to claim 1, further comprising an adhesive layer disposed between the piezoelectric film type actuator and the housing.
5. 5. The display device according to claim 1, further comprising a heat dissipation plate provided on a front surface of the piezoelectric film type actuator.
6. 6. The display device according to claim 5, wherein a thermal conductivity of the heat dissipation plate is higher than a thermal conductivity of the metal layer.
7. 7. The display device according to claim 5, wherein the heat dissipation plate is a carbon-based heat dissipation plate.
8. 8. The display device according to claim 5, further comprising an adhesive layer provided between the heat dissipation plate and the metal layer and between the heat dissipation plate and the piezoelectric film type actuator, respectively.
9. 9. The display device according to claim 1, wherein the housing is made of the same material as the metal layer.
10. 10. The display device according to claim 1, further comprising a heat generating element provided on one side of the display panel or the metal layer, Wherein the recess is provided closer to the other side opposite to the side where the heating element is provided.
11. 11. The display device of claim 1, wherein the adhesive layer comprises a getter material.
12. 12. A display device, the display device comprising: a metal layer having a rear surface with a groove disposed therein; A display panel disposed on a front surface of the metal layer, wherein the entire front surface of the metal layer is attached to the entire rear surface of the display panel via an adhesive layer, and the metal layer is used as a heat sink; A driver disposed in the recess of the metal layer; A piezoelectric film type actuator provided in the recess of the metal layer on at least one side of the driver, the front and side surfaces of the piezoelectric film type actuator being surrounded by the inner surface of the metal layer in the recess and electrically connected to the driver, and A housing provided to cover a rear surface of the driver and a rear surface of the piezoelectric film type actuator.
13. 13. The display device according to claim 12, further comprising an adhesive layer disposed between the piezoelectric film type actuator and the housing.
14. 14. The display device according to claim 12, further comprising a heat radiating plate provided on a front surface of the driver and a front surface of the piezoelectric film type actuator.
15. 15. The display device according to claim 14, wherein a thermal conductivity of the heat dissipation plate is higher than a thermal conductivity of the metal layer.
16. 16. The display device according to claim 14, wherein the heat dissipation plate is a carbon-based heat dissipation plate.
17. 17. The display device according to claim 14, further comprising an adhesive layer provided between the heat dissipation plate and the metal layer and between the heat dissipation plate and the piezoelectric film type actuator, respectively.
18. 18. The display device according to claim 12, wherein the housing is made of the same material as the metal layer.
19. 19. The display device according to claim 12, further comprising a heat generating element provided on one side of the display panel or the metal layer, Wherein the recess is arranged closer to the other side opposite to the side where the heating element is arranged.
20. 20. The display device of claim 12, wherein the adhesive layer comprises a getter material.

Description

Display device Technical Field Disclosed herein is a display device for providing an image, and more particularly, a display device for providing sound together with an image without installing a separate speaker. Background The display device may include a display panel for providing an image. The display panel may include a liquid crystal display panel, an organic light emitting diode display panel, a quantum dot display panel, a micro LED display panel, and the like. Such a display device may include a speaker for providing sound and a display panel. The speakers may be mounted in the display device or provided separately as a bar-type sound box. When the speaker is mounted in the display device, the speaker may be generally mounted on each side surface of the display panel. When the speaker is mounted in the display device, the propagation direction of sound generated through the speaker may not be toward the viewer. For example, sound generated by the speakers may propagate in the lateral direction of the display panel or in the top and bottom directions of the display panel. Therefore, sound quality may be deteriorated due to interference of sound reflected from a wall or a floor. In addition, when speakers are installed in a plant such as a TV, the speakers may occupy a certain space, and thus there may be restrictions on the design and spatial arrangement of the plant. Disclosure of Invention Technical problem Accordingly, it is an object of the present disclosure to address the above and other problems. Embodiments of the present disclosure provide a display device using a piezoelectric film type actuator configured to output sound in a front direction of a display panel. In particular, embodiments of the present disclosure may provide a display device using a piezoelectric film type actuator that may suppress an increase in the total thickness of the device. It is another object of the present disclosure to provide a display device that can increase the area of a piezoelectric film type actuator. Another object of the present disclosure is to provide a display device that may have a set of driving units embedded therein to drive a display panel and a piezoelectric film type actuator. Technical proposal Embodiments of the present disclosure provide a display device including a metal layer, a display panel, a piezoelectric film type actuator, and a case. The metal layer may support and encapsulate the display panel and radiate heat generated in the display device. At least one groove may be provided in the rear surface of the metal layer. The display panel may be disposed on a front surface of the metal layer. The piezoelectric film type actuator may be disposed in a groove of the metal layer and configured to vibrate the display panel. The housing may cover a rear surface of the piezoelectric film type actuator. Since the piezoelectric film type actuator is disposed in the groove formed in the metal layer, the total thickness of the display device can be reduced. In order to improve heat dissipation performance, a heat dissipation plate may be provided on the front surface of the piezoelectric film type actuator. The heat dissipation plate may have a higher thermal conductivity than the metal layer. The heat sink may be a carbon-based heat sink, such as a graphite plate. The heating element may be disposed on one side of the display panel or the metal layer, and the groove may be disposed closer to the other side opposite to the side on which the heating element is disposed. Accordingly, the performance of the organic element of the display such as the organic light emitting device can be reduced or prevented from being deteriorated due to heat. A driver for driving the piezoelectric film type actuator may be provided in other regions on the rear surface of the metal layer than the region where the grooves are provided. In this case, an additional cover for covering the rear surface of the metal layer may be provided to protect the outside of the display. A display according to another embodiment of the present disclosure may include a metal layer, a display panel, a piezoelectric film type actuator, and a housing. The metal layer may support and encapsulate the display panel and radiate heat generated in the display device. At least one groove may be provided in the rear surface of the metal layer. The display panel may be disposed on a front surface of the metal layer. The piezoelectric film type actuator may be disposed in a recess of the metal layer. The housing may even cover the side and rear surfaces of the piezo film actuator. When the recess is larger than the piezoelectric film type actuator in the display device, the housing may fill the void. Accordingly, the vibration area can be increased and the heat dissipation performance can be improved. In another implementation, embodiments of the present disclosure may also provide a display device including a metal layer, a display panel, a dr