CN109671357B

CN109671357B - Display device

Info

Publication number: CN109671357B
Application number: CN201910015792.2A
Authority: CN
Inventors: 刘桂琪; 杨朋博; 姚潞晨; 张飞霞; 张天祥; 阚宇晨
Original assignee: Kunshan New Flat Panel Display Technology Center Co Ltd; Kunshan Govisionox Optoelectronics Co Ltd
Current assignee: Kunshan New Flat Panel Display Technology Center Co Ltd; Kunshan Govisionox Optoelectronics Co Ltd
Priority date: 2019-01-08
Filing date: 2019-01-08
Publication date: 2020-12-11
Anticipated expiration: 2039-01-08
Also published as: CN109671357A

Abstract

The present invention relates to a display device including: the flexible screen comprises a bending area, a first area and a second area, wherein the first area and the second area are respectively positioned on two sides of the bending area; the first support body is fixedly arranged on the back surface of the first area so as to support the first area; the second support body is fixedly arranged on the back surface of the second area so as to support the second area; the flattening component is arranged on the back of the bending area; when the bending area is unfolded, the flattening component respectively acts on the first supporting body and the second supporting body to form a thrust. Above-mentioned display device, when the bending region of flexible screen expandes, it is used for promoting first supporter to open up the flat subassembly to make first supporter remove along the direction of keeping away from the second supporter, thereby make the distance increase between first supporter and the second supporter, and then drive the first region removal of flexible screen, make the distance increase between first region and the second region, thereby make the bending region of flexible screen stretched, in order to eliminate the fold of bending region.

Description

Display device

Technical Field

The invention relates to the field of display, in particular to a display device.

Background

With the development of technology, display devices are becoming more and more popular with users due to their foldable nature.

However, when the bending radius of the bending region of the flexible screen is smaller than the curvature radius of the bending region, the conventional display device causes wrinkles in the bending region when the bending region is unfolded, and the wrinkles are not easily restored when the bending region is unfolded, thereby affecting the visual effect, and may seriously affect the service life of devices in the bending region.

Disclosure of Invention

Based on this, there is a need for a display device that can eliminate wrinkles of a bending region of a flexible screen.

A display device, comprising:

the flexible screen comprises a bending area, a first area and a second area, wherein the first area and the second area are respectively positioned on two sides of the bending area;

the first support body is fixedly arranged on the back surface of the first area so as to support the first area;

the second support body is fixedly arranged on the back surface of the second area so as to support the second area;

the flattening component is arranged on the back of the bending area; when the bending area is unfolded, the flattening component is used for pushing the first supporting body, so that the first supporting body moves along the direction far away from the second supporting body.

In one embodiment, the flattening assembly comprises a driving shaft arranged on one side of the second support body close to the first support body, and a flattening piece connected with the driving shaft; the driving shaft can move along the direction perpendicular to the second area to drive the flattening piece to move, and the flattening piece can push the first support body to move.

In one embodiment, the flattening member is a flattening rod, one end of the flattening member is rotatably connected with the driving shaft, the other end of the flattening member is rotatably connected with the first support body, and an included angle between the flattening member and the moving direction of the driving shaft is an acute angle.

In one embodiment, the angle between the flattening element and the direction of movement of the drive shaft is in the range of 30 to 60 degrees.

In one embodiment, the flattening assembly comprises at least two flattening members.

In one embodiment, the flattening member is a wedge-shaped block fixedly arranged on the driving shaft, the flattening member has an inclined surface, and one side of the first support body close to the second support body abuts against the inclined surface of the flattening member.

In one embodiment, the flattening assembly further comprises a driving member fixedly arranged on one side of the first supporting body close to the second supporting body; the driving piece is used for moving along with the first supporting body when the bending area is unfolded so as to drive the driving shaft to move.

In one embodiment, the driving member includes a driving member main body fixedly provided on the first support body, and a nut rotatably provided on the driving member main body, the nut being configured to be immovable in a direction perpendicular to the second region, and the outer surface of the driving shaft has a thread matching the nut.

In one embodiment, the elastic member is disposed between the first support and the second support.

In one embodiment, the first support and the second support are both rigid support plates.

Above-mentioned display device, when the bending region of flexible screen expandes, it is used for promoting first supporter to open up the flat subassembly to make first supporter remove along the direction of keeping away from the second supporter, thereby make the distance increase between first supporter and the second supporter, and then drive the first region removal of flexible screen, make the distance increase between first region and the second region, thereby make the bending region of flexible screen stretched, in order to eliminate the fold of bending region.

Drawings

Fig. 1 is a schematic structural diagram of a display device according to an embodiment of the present invention.

Fig. 2 is a schematic structural diagram of a display device according to another embodiment of the present invention.

Fig. 3 is a schematic structural diagram of a display device according to still another embodiment of the invention.

Detailed Description

As described in the background art, in the conventional display device, when the bending radius of the bending region of the flexible screen is smaller than the curvature radius of the bending region, the bending region is wrinkled, and the wrinkles are not easily restored when the bending region is unfolded, so that the visual effect is affected, and the service life of devices in the bending region may be seriously affected.

Although some supporting devices exist in the conventional art to support the bending region of the flexible screen after the bending region of the display device is unfolded, so as to prevent the bending region of the flexible screen from being bent again, thereby facilitating use. However, the supporting device in the conventional art can only prevent the bending region of the flexible screen from being bent again when unfolded, and cannot recover the wrinkles of the bending region.

The researchers of the invention find that when the bending radius of the bending area of the flexible screen is smaller than the curvature radius of the bending area, the internal stress of the bending area is unbalanced, namely exceeds the stress threshold value inside the bending area, so that the film layer inside the bending area is in a bending failure or fatigue state, and the phenomenon of the stress unbalance is not easy to disappear after the bending area is unfolded, so that the deformation of the bending area cannot be recovered, namely the bending area is wrinkled.

Accordingly, the present invention provides a display device comprising: flexible screen, first supporter, second supporter and exhibition flat subassembly.

Specifically, the flexible screen comprises a bending area, and a first area and a second area which are respectively positioned at two sides of the bending area. The first support body is fixedly arranged on the back surface of the first area to support the first area. The second support body is fixedly arranged on the back surface of the second area to support the second area. The flattening component is arranged on the back of the bending area. When the bending area is unfolded, the flattening component is used for pushing the first supporting body, so that the first supporting body moves along the direction far away from the second supporting body.

Generally, the first region and the second region of the flexible screen are always in a flat state, and the bending of the flexible screen, that is, the bending of the display device, is realized by bending the bending region. Specifically, the first region is held in a flat state by the support of the first support body, and similarly, the second region is held in a flat state by the support of the second support body.

It should be noted that the display device can be designed to be folded many times according to the size of the display device, and is convenient to carry. Therefore, the flexible screen is provided with a plurality of bending areas to realize the multi-time folding of the display device, and correspondingly, the flexible screen is provided with a plurality of straight areas which are respectively positioned between two adjacent bending areas or positioned on one side of the bending area at the edge, which is far away from the adjacent bending area.

It can be understood that the flattening assembly is located on the back of the bending area, and when the bending area is unfolded, the flattening assembly pushes the first support body so that the first support body moves in the direction away from the second support body. The flattening assembly is at least partially located between the first support and the second support.

Above-mentioned display device, when the bending zone of flexible screen expandes, it is used for promoting first supporter to open up the flat subassembly, so that first supporter removes along the direction of keeping away from the second supporter, thereby make the distance increase between first supporter and the second supporter, and then drive the first region of flexible screen and remove, make the distance increase between first region and the second region, thereby make the bending zone of flexible screen stretched, eliminate the phenomenon of the inside rete stress unbalance of bending zone, in order to eliminate the fold of bending zone.

It is understood that the term "wrinkling" of the bending zone as used herein includes the case where the bending zone is locally uneven or partially creased.

In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in detail below. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. This invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein.

It will be understood that when an element is referred to as being "secured to" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.

As shown in fig. 1, a display device 100 according to an embodiment of the present invention includes: flexible screen 110, first support 130, second support 150, and flattening assembly 170.

Specifically, the flexible screen 110 includes a bending region 111, and a first region 113 and a second region 115 respectively located at both sides of the bending region 111. The bending region 111 is a region where the flexible display screen 110 is subjected to tensile stress when folded. The first supporting body 130 is fixedly disposed on the back surface of the first region 113 to support the first region 113. The second supporter 150 is fixedly disposed on a rear surface of the second region 115 to support the second region 115. The flattening assembly 170 is disposed on the back of the bending region 111. When the bending region 111 is unfolded, the flattening assembly 170 is configured to push the first supporting body 130, so that the first supporting body 130 moves along a direction away from the second supporting body 150, and drives the first region 113 to move, thereby flattening the bending region 111.

In this embodiment, the flattening assembly 170 is located between the first support 130 and the second support 150.

It is understood that the bending region 111 of the flexible screen 110 may be bent only inward, only outward, or both inward and outward, depending on the specific structural design of the display device 100.

When the bending region 111 of the flexible screen 110 is unfolded, the flattening assembly 170 is used for pushing the first support 130, so that the first support 130 moves along the direction away from the second support 150, thereby increasing the distance between the first support 130 and the second support 150, and further driving the first region 113 of the flexible screen 110 to move, increasing the distance between the first region 113 and the second region 115, so that the bending region 111 of the flexible screen 110 is stretched, and eliminating the phenomenon of stress imbalance of the film layer inside the bending region 111, so as to eliminate wrinkles of the bending region 111.

Specifically, in the present embodiment, the flattening assembly 170 includes a driving shaft 171 disposed on a side of the second support 150 close to the first support 130, and a flattening member 173 connected to the driving shaft 171. The driving shaft 171 may be moved in a direction perpendicular to the second region 115 to drive the movement of the flattening member 173, and the flattening member 173 may push the first support 130 to move.

In this embodiment, the axis of the drive shaft 171 is perpendicular to the second region 115. I.e., the moving direction of the driving shaft 171 is the axial direction of the driving shaft 171. In other embodiments, the direction of movement of the drive shaft 171 is not limited to the axial direction of the drive shaft 171. The moving direction of the driving shaft 171 may be inclined at an angle to the axial direction of the driving shaft 171.

In this embodiment, the driving shaft 171 is a cylinder. The flattening member 173 is driven by the movement of the driving shaft 171. Of course, in other embodiments, the driving shaft 171 may be replaced by an element having another shape that is movable in a direction perpendicular to the second region 115.

In this embodiment, the driving shaft 171 is fixed to the second support 150. Generally, since the wrinkles of the bending region 111 are small, and the deformation amount of the bending region 111 is on the millimeter level or even the micrometer level, the first supporting body 130 and the second supporting body 150 respectively move to the two sides for a small distance to stretch the bending region 111 so as to eliminate the wrinkles on the bending region 111. Therefore, even if the driving shaft 171 is fixed on the second supporting body 150, it can slightly move along with the second supporting body 150, or elastically deform relative to the second supporting body 150 to achieve the purpose of moving upward, and further drive the flattening member 173 to push the first supporting body 130 to move.

Specifically, in the present embodiment, the driving shaft 171 is fixed to the second supporting body 150 by the fixing member 172. In one possible embodiment, the fixing member 172 is fixedly coupled to the driving shaft 171 at one side and fixedly coupled to the second supporting body 150 at the other side. In another possible embodiment, the driving shaft 171 is integrally formed with the fixing member 172, and the fixing member 172 is fixedly coupled to the second supporting body 150.

Of course, in another embodiment, the driving shaft 171 may be movably disposed on the second supporting body 150.

In this embodiment, the flattening member 173 is a flattening rod. The flattening member 173 is rotatably coupled to the driving shaft 171 at one end and to the first support 130 at the other end. The flattening rod is at an acute angle to the axial direction of the drive shaft 171.

Specifically, in this embodiment, the position where the flattening member 173 is connected to the first support 130 is closer to the flexible screen 110 in the moving direction of the driving shaft 171 than the position where the flattening member 173 is connected to the driving shaft 171. When the driving shaft 171 moves upward, the flattening member 173 is driven to rotate, thereby pushing the first supporting body 130 to move in a direction away from the second supporting body 150.

Preferably, the angle between the flattening member 173 and the moving direction of the driving shaft 171 is in the range of 30 degrees to 60 degrees, so that the rotation angle of the flattening member 173 is better matched with the flattening distance of the flattening member 173, that is, the driving shaft 171 can easily drive the flattening member 173 to rotate, and the flattening member 173 cannot be rotated to be parallel to the second region 115 to eliminate the wrinkles of the bending region 111. It will be appreciated that the flattening distance of the flattening member 173 refers to the distance that the first support 130 is pushed by the flattening assembly 170 to move relative to the second support 150. More preferably, in the present embodiment, the angle between the flattening member 173 and the moving direction of the driving shaft 171 is 45 degrees.

Of course, in other embodiments, the flattening 173 may also be inclined in the opposite direction. It will be appreciated that the drive shaft is required to move in the opposite direction to rotate the flattening member 173, thereby pushing the first supporting body 130 to move in a direction away from the second supporting body 150.

In this embodiment, the flattening assembly 170 includes at least two flattening members 173, so as to reduce the stress applied by each of the flattening members 173 on the first support 130, that is, the stress reacted by the first support 130 on each of the flattening members 173 is reduced, and the flattening members 173 are effectively prevented from being deformed due to a large force. Of course, in further embodiments, the flattening assembly 170 may also include only one flattening 173 or more than two flattening 173.

It will be appreciated that when the flattening member 170 includes at least two flattening members 173, all of the flattening members 173 have the same angle with respect to the moving direction of the driving shaft 171, so that it can be ensured that when the driving shaft 171 moves, the flattening members 173 rotate by the same angle, thereby pushing the first supporting body 130 to move by the same distance.

In addition, the at least two flattening members 173 may be arranged along the direction in which the driving shaft 171 moves, may be arranged along the direction perpendicular to the direction in which the driving shaft 171 moves, and may be arranged along other directions.

In this embodiment, the flattening assembly 170 further includes a driving member 175 fixedly disposed on a side of the first supporting body 130 close to the second supporting body 150. The driving member 175 is configured to move with the first supporting body 130 to drive the driving shaft 171 to move when the bending region 111 is unfolded. That is, the movement of the driving shaft 171 can be driven by the movement of the first support 130 without the action of external force.

Specifically, when the bending region 111 is unfolded, the first supporting body 130 rotates relative to the second supporting body 150, so that one side of the first supporting body 130, which is close to the flattening assembly 170, is gradually close to the second supporting body 150, the driving member 175 is driven to be gradually close to the second supporting body 150, and then the driving shaft 171 is driven to move in the direction perpendicular to the second region 115 by the movement of the driving member 175, so that the flattening member 173 is driven to rotate, so that the first supporting body 130 is driven to move, and the first supporting body 130 is prevented from being excessively close to the second supporting body 150.

In this embodiment, the driving member 175 is threadedly coupled to the driving shaft 171. Specifically, the driving member 175 includes a driving member body 1751 fixedly disposed on the first supporting body 130, and a nut 1753 rotatably disposed on the driving member body 1751. The nut 1753 is configured to be immovable in a direction perpendicular to the second region 115, and the outer surface of the drive shaft 171 has a thread that matches the nut 1753.

Specifically, as the nut 1753 moves closer to the second support body 150, the nut 1753 interacts with the threads on the outer surface of the drive shaft 171 to cause relative rotation of the nut 1753 and the drive shaft 171. It will be appreciated that when the nut 1753 is rotated relative to the drive shaft 171, it will necessarily move relative to the drive shaft 171 in the axial direction. And nut 1753 is configured to be immovable in a direction perpendicular to second region 115 of flexible screen 110, such that rotation of nut 1753 causes relative movement of drive shaft 171 along its axial direction.

Of course, in other embodiments, the nut 1753 may not be rotated, and the threaded portion of the outer surface of the drive shaft 171 may be rotated.

Also, as described above, as nut 1753 is moved adjacent second support body 150, nut 1753 interacts with the threads on the outer surface of drive shaft 171 to cause relative rotation between nut 1753 and the threaded portion of the outer surface of drive shaft 171. In the event that nut 1753 is not able to move in a direction perpendicular to second region 115 of flexible screen 110, the threaded portion of the outer surface of the drive shaft is caused to move relatively in its axial direction, thereby urging drive shaft 171 to move in its axial direction.

In this embodiment, the flattening member 173 is located on the side of the actuator 175 adjacent to the flexible screen 110. Of course, in still other embodiments, the flattening member 173 may also be located on the side of the driving member 175 away from the flexible screen 110.

Of course, in other embodiments, the driving shaft 171 may be driven to move by other means. If the driving shaft 171 is provided to protrude to the back of the display device, the driving shaft 171 is driven to move by manual pressing or the like. For another example, an operating member may be provided on the rear surface or other position of the display device 100, and the operating member is connected to the driving shaft 171 and operates to move the driving shaft 171. For another example, the control of the driving shaft 171 may also be realized by software.

In this embodiment, the first supporting body 130 and the second supporting body 150 are both rigid supporting plates. Of course, in another embodiment, the first and

second supports

130 and 150 are not limited to rigid support plates, and may be configured to support the first and

second regions

113 and 115.

As shown in fig. 2, a display device 200 according to another embodiment of the present invention is different from the display device 100 in that the flattening member 273 is a wedge-shaped block fixedly disposed on the driving shaft 271 and abutting against the first support 230.

Specifically, the direction of the wedge-shaped block in this embodiment is as shown in fig. 2, the flattening member 273 has an inclined surface 2731, and the side of the first support body 230 near the second support body 250 abuts against the inclined surface 2731 of the flattening member 273. When the driving shaft 271 moves upward, the flattening member 273 moves upward to push the first supporting body 230 to move in a direction away from the second supporting body 250.

More specifically, the side of the first support body 230 adjacent to the second support body 250 has a groove 231, and the groove 231 has an inclined wall 2311 matched with the inclined surface 2731 of the flattening member 273, so that the flattening member 273 is more smoothly moved when pushing the first support body 230.

As shown in fig. 3, a display device 300 according to still another embodiment of the present invention is different from the display device 100 in that a flattening assembly 370 includes an elastic member 372 disposed between a first supporting body 330 and a second supporting body 350.

It should be noted that, in the present embodiment, the flattening assembly 370 only includes the elastic member 372, and does not include the driving shaft 171, the flattening member 173 and the driving member 175 in the flattening assembly 170.

Specifically, in this embodiment, one end of the elastic member 372 is fixedly connected to one side of the second supporting body 350 close to the first supporting body 330. The elastic member 372 is compressed when the bending region 311 is unfolded, and the other end of the elastic member 372 abuts against one side of the first support 330 close to the second support 350.

Likewise, the bending region 311 may be bent only inward, only outward, or both inward and outward according to the specific structural design of the display device 300.

When the bending region 311 is unfolded, the elastic member 372 is compressed and abuts against the first supporting body 330, so as to push the first supporting body 330 to move along the direction away from the second supporting body 350, so as to increase the distance between the first supporting body 330 and the second supporting body 350, and further drive the first region 313 to move, so as to increase the distance between the first region 313 and the second region 315, so as to stretch the bending region 311, eliminate the phenomenon of stress imbalance of the film layer inside the bending region 311, and eliminate the wrinkles of the bending region 311.

Of course, in another embodiment, both ends of the elastic member 372 may be fixedly connected to the first supporting body 330 and the second supporting body 350, respectively.

Specifically, the elastic member 372 may be a spring, a rubber member, or the like.

The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.

The above-mentioned embodiments only express several embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.

Claims

1. A display device, comprising:

the flattening component is arranged on the back of the bending area; when the bending area is unfolded, the flattening component is used for pushing the first support body so as to enable the first support body to move along the direction far away from the second support body;

the flattening assembly comprises a driving shaft arranged on one side, close to the first supporting body, of the second supporting body and a flattening piece connected with the driving shaft; the driving shaft can move along the direction perpendicular to the second area to drive the flattening piece to move, and the flattening piece can push the first support body to move.

2. The display device according to claim 1, wherein the flattening member is a flattening rod, one end of the flattening member is rotatably connected to the driving shaft, the other end of the flattening member is rotatably connected to the first support body, and an included angle between the flattening member and a direction in which the driving shaft moves is an acute angle.

3. The display device of claim 2, wherein the angle between the flattening member and the direction in which the drive shaft moves ranges from 30 degrees to 60 degrees.

4. The display device of claim 2, wherein the flattening assembly comprises at least two of the flattening members.

5. The display device according to claim 1, wherein the flattening member is a wedge-shaped block fixedly provided on the driving shaft, the flattening member has an inclined surface, and a side of the first support body adjacent to the second support body abuts against the inclined surface of the flattening member.

6. The display device according to any one of claims 2 to 5, wherein the flattening assembly further comprises a driving member fixedly disposed on a side of the first support body adjacent to the second support body; the driving piece is used for moving along with the first supporting body when the bending area is unfolded so as to drive the driving shaft to move.

7. The display device as claimed in claim 6, wherein the driving member includes a driving member main body fixedly provided on the first support body, and a nut rotatably provided on the driving member main body, the nut being configured to be immovable in a direction perpendicular to the second region, the driving shaft outer surface having a thread matching the nut.

8. The display device according to claim 1, wherein the flattening assembly comprises an elastic member disposed between the first support and the second support.

9. The display device according to claim 1, wherein the first support and the second support are both rigid support plates.