CN-116741046-B - Display apparatus

Abstract

A display apparatus includes a display unit including a display panel configured to display an image, a curvature changing unit disposed on a rear surface of the display unit and changing a curvature of the display unit, and a vibration unit disposed on the rear surface of the display unit and configured to vibrate the display panel.

Inventors

• Zhao Xixiao

Assignees

• 乐金显示有限公司

Dates

Publication Date

20260508

Application Date

20201106

Priority Date

20191108

Claims (20)

1. 1. A display device, the display device comprising: a display unit including a display panel configured to display an image; A curvature changing unit provided on a rear surface of the display unit and changing a curvature of the display unit, and A vibration unit provided on the rear surface of the display unit and configured to vibrate the display panel, Wherein the curvature changing unit includes: A first arc member and a second arc member provided in a first rear region and a second rear region of the display unit parallel to a first direction, respectively, each of the first arc member and the second arc member having a curved shape protruding toward a rear central portion of the display unit; A guide provided in each of a third rear region and a fourth rear region of the display unit parallel to a second direction intersecting the first direction to support each of the first arc-shaped member and the second arc-shaped member; a fixing bracket provided in each of the third and fourth rear regions of the display unit to movably support an end of each of the first and second arc members, and A driver provided in a rear central region of the display unit to simultaneously rotate a central portion of each of the first and second arc members, and Wherein the driver comprises: a first holder rotatably supporting a central portion of the first arc member; A second holder rotatably supporting a central portion of the second arc member; A first fixed link fixed to a central portion of the first arc-shaped member; a second fixed link fixed to a central portion of the second arc-shaped member; At least one rotating electrical machine; a first rack that rotates the first fixed link; a second rack that rotates the second fixed link; a pinion gear connected between the first rack and the second rack, and And a rotation transmission member that rotates the pinion gear based on rotation of the at least one rotating electric machine.
2. 2. The display device of claim 1, wherein, The display unit includes a rear cover provided on a rear surface of the display panel and supporting the vibration unit, and Wherein the rear cover includes a slit overlapping the vibration unit.
3. 3. The display device of claim 2, wherein, The vibration unit includes a pair of sound generation units coupled to the rear cover to vibrate the display panel, and The slit is implemented in the rear cover and overlaps with a region between the pair of sound generating units.
4. 4. The display device of claim 3, wherein, Each of the pair of sound generating units includes a bobbin and a coil wound around the bobbin, and The bobbin passes through the rear cover and is connected to the rear surface of the display panel.
5. 5. The display device according to claim 1, wherein the vibration unit includes: a first vibration unit disposed in a first region of the display unit, and And a second vibration unit disposed in a second region of the display unit.
6. 6. The display device of claim 5, wherein, The display unit includes a rear cover disposed on the rear surface of the display panel to support each of the first and second vibration units, Each of the first and second vibration units includes first and second sound generation units disposed side by side, and The rear cover includes a slit disposed between the first sound generation unit and the second sound generation unit.
7. 7. The display device according to claim 1, wherein each of the first arc member and the second arc member has a curved shape and rotates in two opposite directions based on driving of the driver.
8. 8. The display device of claim 1, wherein, A central portion of each of the first and second arc members is adjacent to a rear central portion of the display unit, and an end portion of each of the first and second arc members is adjacent to a corner of the display unit.
9. 9. A display device, the display device comprising: a display unit including a display panel configured to display an image; A curvature changing unit provided on a rear surface of the display unit and changing a curvature of the display unit, and A vibration unit provided on the rear surface of the display unit and configured to vibrate the display panel, Wherein the curvature changing unit includes: A first arc member and a second arc member provided in a first rear region and a second rear region of the display unit parallel to a first direction, respectively, each of the first arc member and the second arc member having a curved shape protruding toward a rear central portion of the display unit; A guide provided in each of a third rear region and a fourth rear region of the display unit parallel to a second direction intersecting the first direction to support each of the first arc-shaped member and the second arc-shaped member; A fixing bracket provided in each of the third and fourth rear edge portions of the display unit; an engaging member rotatably provided in the fixing bracket and inserted into an end portion of each of the first arc member and the second arc member, and And a driver provided in a rear central portion of the display unit to simultaneously rotate a central portion of each of the first and second arc members.
10. 10. The display apparatus according to claim 9, wherein each of the first arc member and the second arc member rotates in the same direction while moving in the same direction based on driving of the driver.
11. 11. The display device of claim 9, wherein the driver comprises: a guide plate provided on the rear surface of the display unit, the guide plate including a guide rail; a first holder link provided on one side of the guide plate to rotatably support a central portion of the first arc-shaped member; a second holder link provided on the other side of the guide plate to rotatably support a central portion of the second arc-shaped member; a slider including one or a pair of racks connected between the first holder link and the second holder link and slidably disposed in the guide rail; one or a pair of pinion gears that slide the one or a pair of racks; one or a pair of rotating electrical machines, and And a rotation transmission member that rotates the one or the pair of pinion gears based on rotation of the one or the pair of rotating electric machines.
12. 12. A display device, the display device comprising: a display unit including a display panel configured to display an image; A curvature changing unit provided on a rear surface of the display unit and changing a curvature of the display unit, and A vibration unit provided on the rear surface of the display unit and configured to vibrate the display panel, Wherein the curvature changing unit includes: A first arc member and a second arc member provided in a first rear region and a second rear region of the display unit parallel to a first direction, respectively, each of the first arc member and the second arc member having a curved shape protruding toward a rear central portion of the display unit; A guide provided in each of a third rear region and a fourth rear region of the display unit parallel to a second direction intersecting the first direction to support each of the first arc-shaped member and the second arc-shaped member; a fixing bracket provided in each of the third and fourth rear regions of the display unit to movably support an end of each of the first and second arc members, and A driver provided in a rear central region of the display unit to simultaneously rotate a central portion of each of the first and second arc members, and The fixed bracket is disposed to be inclined with respect to the second direction.
13. 13. The display device according to claim 12, wherein each of the first arc member and the second arc member rotates in two opposite directions based on driving of the driver.
14. 14. The display device of claim 12, wherein the driver comprises: a first holder rotatably supporting a central portion of the first arc member; A second holder rotatably supporting a central portion of the second arc member; A first fixed link fixed to a central portion of the first arc-shaped member; a second fixed link fixed to a central portion of the second arc-shaped member; At least one rotating electrical machine; a first rack that rotates the first fixed link; a second rack that rotates the second fixed link; a pinion gear connected between the first rack and the second rack, and And a rotation transmission member that rotates the pinion gear based on rotation of the at least one rotating electric machine.
15. 15. A display device, the display device comprising: a display unit including a display panel configured to display an image, and A curvature changing unit provided on a rear surface of the display unit and changing a curvature of the display unit, and A rear shielding unit disposed on the rear surface of the display panel to cover the curvature varying unit, Wherein the curvature changing unit includes: A first arc member and a second arc member provided in a first rear region and a second rear region of the display unit parallel to a first direction, respectively, each of the first arc member and the second arc member having a curved shape protruding toward a rear central portion of the display unit; A driver provided in a rear central region of the display unit to simultaneously rotate a central portion of each of the first and second arc members; A guide provided on the rear surface of the display unit in parallel to a second direction intersecting the first direction to movably support a central portion of each of the first and second arc members and an intermediate portion between both ends, and A fixing bracket provided in each of a third rear edge portion and a fourth rear edge portion of the display unit parallel to the second direction intersecting the first direction, and The fixing bracket transmits pressure applied to an end portion of each of the first and second arc members rotated based on driving of the driver to each of the third and fourth rear edge portions of the display unit, and Wherein the rear shielding unit includes: a shielding edge frame connected to a rear edge portion of the display unit, the shielding edge frame including a first opening portion; a shielding rear frame connected to the shielding edge frame, the shielding rear frame including a second opening portion overlapping the first opening portion, and A plurality of shielding members provided to be spaced apart from the second opening portion of the shielding rear frame.
16. 16. The display device of claim 15, wherein the fixed bracket movably supports an end of each of the first and second arc members.
17. 17. The display device according to claim 16, wherein the fixing bracket is provided to be inclined with respect to the second direction.
18. 18. The display apparatus according to claim 15, wherein the curvature changing unit further includes an engaging member rotatably provided in the fixing bracket, and Wherein the engagement member includes: a pin portion inserted into an end of each of the first and second arc members, and A ring portion connected to an end of the pin portion and rotatably provided in the fixing bracket.
19. 19. The display device according to claim 15, further comprising a vibration unit provided on the rear surface of the display unit and configured to vibrate the display panel.
20. 20. The display device of claim 19, wherein, The display unit includes a rear cover disposed on a rear surface of the display panel to support the vibration unit, The vibration unit includes a pair of sound generation units coupled to the rear cover to vibrate the display panel, and The rear cover includes a slit overlapping a region between the pair of sound generating units.

Description

Display apparatus The application is a divisional application of an application patent application (application date: 2020, 11, 6 days, title of the application: display device) with the original application number 202011228294.5. Technical Field The present disclosure relates to a display device, and more particularly, to a curved display device (curved display apparatus). Background With the development of information-oriented society, various demands for display devices for displaying images are increasing. Recently, since the display screen of each display device is enlarged with a flat type, there is a problem in that a deviation between a viewing distance to a central area of the screen and a viewing distance to each of both side areas of the screen increases. In order to reduce viewing distance deviation and maximize the immersion of a user viewing an image, a curved display device in which a flat display panel is curved with a specific curvature has been proposed. In the related art display device, since the display panel remains in a state of being bent with a specific curvature, the curvature of the display panel cannot be changed (or changed) based on a selection (or preference) of a user (or viewer). Further, in the related art curved display apparatus, since the sound output from the sound device for outputting the sound associated with the image propagates in the forward direction or the downward direction with respect to the display panel, the sound quality may be reduced due to interference between the sounds reflected by the wall or the floor, and due to this, it may be difficult to accurately transmit the sound and the immersion feeling of the viewer may be reduced. Accordingly, in the related art curved display device, the immersion of the user viewing the image may be maximized by the screen being curved with a certain curvature, but it may be difficult to precisely transmit sound, resulting in a reduction in the acoustic immersion of the user. Disclosure of Invention The inventors have recognized the problems of the related art curved display device, and have performed various experiments on a display device that can change (or vary) the curvature of a display panel (or a display unit) and a display device that can change the curvature of the display panel and can output sound in a forward direction with respect to the display panel to maximize the immersion of a user (or viewer) viewing an image. Through various experiments, the inventors have discovered a display device having a new structure that can change the curvature of a display panel, and a display device having a new structure that can maximize the immersion of a user viewing an image. Accordingly, the present disclosure is directed to a display device that substantially obviates one or more problems due to limitations and disadvantages of the related art. An aspect of the present disclosure is directed to providing a display device that may hold a display panel in a flat shape or may change a curvature of the display panel. One aspect of the present disclosure is directed to providing a display device that can maximize the immersion of a user (or viewer) viewing an image. Additional advantages and features of the disclosure will be set forth in part in the description which follows and in part will become apparent to those having ordinary skill in the art upon examination of the following or may be learned from practice of the disclosure. The objectives and other advantages of the disclosure will be realized and attained by the structure particularly pointed out in the written description and claims thereof as well as the appended drawings. To achieve these and other advantages and in accordance with the purpose of the present disclosure, as embodied and broadly described herein, there is provided a display apparatus including a display unit including a display panel configured to display an image, a curvature varying unit disposed on a rear surface of the display unit and varying a curvature of the display unit, and a vibration unit disposed on the rear surface of the display unit and configured to vibrate the display panel. In another aspect of the present disclosure, there is provided a display apparatus including a display unit including a display panel configured to display an image, and a curvature varying unit disposed on a rear surface of the display unit and varying a curvature of the display unit, wherein the curvature varying unit includes first and second arc members disposed in first and second rear regions of the display unit parallel to a first direction, respectively, each of the first and second arc members having a curved shape, a driver disposed in a rear central region of the display unit to simultaneously rotate a central portion of each of the first and second arc members, a guide disposed on a rear surface of the display unit parallel to a second direction intersecting the first direction to movably sup