KR20210067159A - Variable curvature display device - Google Patents

Abstract

The application discloses a variable curvature display device, which includes: a flexible display panel; and a curvature control unit which is coupled to the flexible display panel from a rear surface and controls the flexible display panel to be bent to an arbitrary curvature by rotating a rotating shaft at an arbitrary angle due to a vertical motion of a vertical shaft. Accordingly, the curvature of the display device may be varied through a simple structure.

Description

Variable curvature display device {VARIABLE CURVATURE DISPLAY DEVICE}

The present specification relates to a variable curvature display device, and more particularly, to a variable curvature display device capable of freely adjusting the curvature of a display panel through a simple structure.

In general, a flat panel display device including a liquid crystal display (LCD) or a plasma display panel (PDP) has a viewing angle of a certain range, so that an image displayed on the screen of the flat panel display device cannot be properly viewed at a position outside the viewing angle range. there are cases where there is no

Accordingly, the viewer watches the image from the central part of the display device. When viewed from the user's view, the viewing distance between the central part and both ends of the display device is different from each other. I had.

In order to overcome this limitation, recently, a curved display device in which the display panel itself has a curved shape or a flexible display device in which a part of the display panel can be bent has been introduced.

Since such a curved display device or a flexible display device has the advantage of providing a wider viewing angle and providing a three-dimensional viewing environment to the user, the interest and popularity of the user is increasing day by day.

However, since the curvature of the display panel is fixed in the curved display device, there is a problem in that the display curvature cannot be changed according to the position or distance of the viewer.

In addition, in the flexible display device, the display panel is arranged in a vertical direction, whereas the bending direction of the display panel is a horizontal direction intersecting therewith. Therefore, in order to change the curvature of the display panel, the curvature control unit is positioned on the rear surface of the display panel In addition to this complexity, there is a problem in that the area occupied by the flexible display device is greatly increased by the curvature control unit.

Accordingly, the inventors of the present specification have invented a curvature-variable display device capable of varying the curvature of the display device through a simple structure.

In addition, the inventors of the present specification configure the curvature control unit to control the curvature of the display panel with respect to the horizontal direction through linear motion in the vertical direction, thereby reducing the cost and reducing the area occupied by the curvature variable display. device was invented.

The problems to be solved according to the embodiments of the present specification to be described below are not limited to the problems mentioned above, and other problems not mentioned will be clearly understood by those skilled in the art from the following description.

The variable curvature display device according to an embodiment of the present specification is coupled to the flexible display panel and the flexible display panel from the rear side, and the rotation shaft rotates at an arbitrary angle due to the vertical motion of the vertical shaft, so that the flexible display panel has an arbitrary curvature and a curvature control unit that controls to bend.

In the curvature variable display device according to an embodiment of the present specification, the flexible display panel includes one of an organic light emitting display panel, an electrophoretic display panel, a liquid crystal display panel, and an electrowetting display panel.

In the variable curvature display device according to an embodiment of the present specification, the curvature control unit extends in a first direction of the flexible display panel, and includes one or more rotation shafts for pressing the flexible display panel by rotational motion, and one or more rotation shafts. It is disposed in the second direction of the flexible display panel in the coupled state, and includes a vertical shaft that rotates one or more rotating shafts by linear motion in the second direction.

In the variable curvature display device according to an embodiment of the present specification, one or more rotation shafts include one or more rotation protrusions capable of pressing the flexible display panel forward by rotational motion.

In the curvature variable display device according to an embodiment of the present specification, the rotation protrusion is formed in a structure symmetrical on both sides with respect to the central portion of the rotation shaft.

In the variable curvature display device according to the exemplary embodiment of the present specification, the protrusion length of the rotation protrusion is formed to increase as the distance from the central portion of the rotation shaft increases.

In the variable curvature display apparatus according to an embodiment of the present specification, the rotation protrusion includes a flat section that can be arranged in parallel with the rear surface of the flexible display panel in a flat state in which the flexible display panel is maintained in a flat shape, and the flexible display panel. It includes a protruding section capable of pressing the flexible display panel from the rear side by the rotational movement of the rotating shaft when pressing in a curved shape.

In the curvature variable display device according to the exemplary embodiment of the present specification, the protrusion section is formed to be larger toward the edge of the flexible display panel.

In the curvature variable display device according to an embodiment of the present specification, the protruding section is made of a streamlined flexible material.

In the curvature variable display device according to an embodiment of the present specification, the curvature control unit further includes a protrusion coupling part that protrudes in a direction crossing the first direction in which the rotation shaft extends, and is coupled to the vertical shaft.

In the curvature-variable display device according to an embodiment of the present specification, the rotating shaft, the vertical shaft, and the protruding coupling part have an integrated structure.

In the variable curvature display device according to an embodiment of the present specification, the flexible display panel further includes a rotation shaft coupling hinge that enables the rotational movement of the rotation shaft in a state in which the rotation shaft is coupled.

In the curvature variable display device according to an embodiment of the present specification, the flexible display panel further includes a vertical shaft coupling hinge that enables vertical movement of the vertical shaft in a state in which the vertical shaft is coupled.

According to the embodiments of the present specification, there is an effect that a curvature-variable display device capable of varying the curvature of the display device can be implemented through a simple structure.

Further, according to the embodiments of the present specification, by configuring the curvature control unit to control the curvature of the display panel with respect to the horizontal direction through linear motion in the vertical direction, it is possible to reduce the area occupied while relatively reducing the cost. There is an effect that can implement a curvature variable display device.

The effects of the embodiments disclosed herein are not limited to the above-mentioned effects. In addition, the embodiments disclosed herein may generate other effects not mentioned above, which will be clearly understood by those skilled in the art from the following description.

1 is a front perspective view of a curvature variable display device according to an embodiment of the present specification;
2 is a rear perspective view of a curvature variable display device according to an embodiment of the present specification;
3 is an exploded perspective view of a curvature control unit in a curvature variable display device according to an embodiment of the present specification;
4 is a view showing the structure of the rotation shaft in the curvature variable display device according to an embodiment of the present specification,
5 is an exemplary screen view when a display panel is bent to a constant curvature by a curvature control unit in the curvature variable display device according to an embodiment of the present specification;
6 is a view showing various examples of a case in which the curvature of a display panel is changed by a curvature control unit in a curvature variable display device according to an embodiment of the present specification;
7 is a plan view illustrating a case in which a display panel is bent to a maximum curvature by a curvature control unit in a curvature variable display device according to an exemplary embodiment of the present specification.

Advantages and features of the present specification and methods of achieving them will become apparent with reference to the embodiments described below in detail in conjunction with the accompanying drawings. However, the present specification is not limited to the embodiments disclosed below, but will be implemented in various different forms, only these embodiments allow the disclosure of the present specification to be complete, and common knowledge in the technical field to which this specification belongs It is provided to fully inform the possessor of the scope of the invention, and this specification is only defined by the scope of the claims.

The shapes, sizes, proportions, angles, numbers, etc. disclosed in the drawings for explaining the embodiments of the present specification are illustrative and the present specification is not limited to the illustrated matters. Like reference numerals refer to like elements throughout. In addition, in the description of the present specification, if it is determined that a detailed description of a related known technology may unnecessarily obscure the subject matter of the present specification, the detailed description thereof will be omitted. When "includes", "has", "consisting of", etc. mentioned in this specification are used, other parts may be added unless "only" is used. When a component is expressed in the singular, the case in which the plural is included is included unless otherwise explicitly stated.

In interpreting the components, it is interpreted as including an error range even if there is no separate explicit description.

In the case of a description of a positional relationship, for example, when the positional relationship of two parts is described as "on", "on", "on", "next to", etc., "immediately" Alternatively, one or more other parts may be placed between two parts unless "directly" is used.

In the case of a description of a temporal relationship, for example, "after", "after", "after", "before", etc., when the temporal precedence is described, "immediately" or "directly" It may include cases that are not continuous unless " is used.

In the case of a description of the signal flow relationship, for example, even in the case of "a signal is transmitted from node A to node B", unless "directly" or "directly" is used, node A goes through another node Thus, a case in which a signal is transmitted to node B may be included.

Although the first, second, etc. are used to describe various components, these components are not limited by these terms. These terms are only used to distinguish one component from another. Accordingly, the first component mentioned below may be the second component within the spirit of the present specification.

Each feature of the various embodiments of the present specification may be partially or wholly combined or combined with each other, technically various interlocking and driving are possible, and each of the embodiments may be independently implemented with respect to each other or may be implemented together in a related relationship. may be

Hereinafter, various embodiments of the present specification will be described in detail with reference to the accompanying drawings.

1 is a front perspective view of a curvature variable display device according to an embodiment of the present specification, and FIG. 2 is a rear perspective view.

1 and 2 , the curvature variable display apparatus 100 according to an embodiment of the present specification is located at the rear of the display panel 200 and the display panel 200 for displaying an image, and the display panel 200 . and a curvature control unit 300 for controlling the curvature of a partial region of .

The display panel 200 is a flexible display panel that can be bent when a force of a certain size or more is applied to a portion of the entire area, and may be configured by disposing a plurality of subpixels on a flexible polymer film.

The display panel 200 includes at least one active area, in which an array of pixels arranged in horizontal and vertical directions is disposed.

In this case, one or more non-display areas may be disposed around the display area, and the non-display area may be formed adjacent to one or more side surfaces of the surrounding areas of the display area.

The display area and the non-display area may have various shapes according to the design of the display device 100 having a variable curvature to which the display panel 200 is coupled.

A plurality of pixels in the display area may be electrically connected to a driving circuit for driving the pixels through a signal line. The driving circuit may include one or more switching transistors and one or more driving transistors.

The driving circuit may include a gate driving circuit for applying a scan signal to a plurality of pixels through a gate line, and a data driving circuit for applying a data voltage to a plurality of pixels through a data line.

The gate driving circuit and the data driving circuit may be implemented as a thin film transistor (TFT) in the non-display area, and this driving circuit may be referred to as a gate-in-panel (GIP).

In addition, an integrated circuit (IC) including a gate driving circuit or a data driving circuit is mounted on a separate printed circuit board, and such as a flexible printed circuit board (FPCB), a chip on film (COF), a tape carrier package (TCP), etc. It may be coupled to the interface disposed in the non-display area through the circuit film.

The display panel 200 may include various additional elements for generating various signals or driving pixels in the display area. Additional elements may include inverter circuits, multiplexers, electrostatic discharge circuits, and the like.

Also, the display panel 200 may include additional elements related to functions other than driving pixels. For example, the display panel 200 may include various additional elements such as a touch sensing function, a user authentication function such as fingerprint or iris recognition, a multi-level pressure sensing function, and a tactile feedback function.

The display panel 200 is an organic light emitting display panel (Flexible Organic Light Emitting Display Panel), an electrophoretic display panel (Flexible Electrophoretic Display Panel), a liquid crystal display panel (Flexible Liquid Crystal Display Panel), or an electro-wetting display panel (Flexible Electro- Wetting Display Panel) and the like.

The side of the display panel 200 may be accommodated in the flexible case 210 along the peripheral edge.

The flexible case 210 may be made of a flexible material that can be bent together with the display panel 200 when the display panel 200 is bent to a constant curvature by the curvature control unit 300 located on the rear surface. The flexible case 210 may be omitted depending on the type of the display panel 200 .

The curvature control unit 300 is disposed to be coupled to the rear surface of the display panel 200 and presses the first region 212 and the second region 214 dividing the display panel 200 from the rear surface, thereby forming the display panel 200 . ) to have a constant curvature.

The curvature control unit 300 may press the first region 212 and the second region 214 positioned on different sides with respect to the center of the display panel 200 toward the front of the display panel 200 . have.

The first area 212 and the second area 214 of the display panel 200 may be located on opposite sides of the display panel 200 in the long axis direction. In this case, since the curvature control unit 300 presses forward, the ends of the display panel 200 at both ends in the longitudinal direction are bent forward.

Conversely, when the first region 212 and the second region 214 pressed by the curvature control unit 300 are located on opposite sides along a direction parallel to the short axis of the display panel 200, the curvature control unit ( With the pressure of 300 , the ends at both ends in the short axis direction of the display panel 200 will be bent forward.

The curvature control unit 300 is disposed in a direction parallel to the display panel 200, and includes one or more rotation shafts 310a and 310b for pressing the display panel 200 by rotational motion, and one or more rotation shafts 310a and 310b. ) may be formed of a vertical shaft 320 that rotates one or more rotating shafts 310a and 310b by a linear motion in the vertical direction in a state coupled to.

The rotation shafts 310a and 310b are provided with a plurality of rotational projections capable of pressing the display panel 200 forward by rotational motion. When the plurality of rotational projections are oriented in the vertical direction, the display panel 200 is flat. keep the status

On the other hand, when the vertical shaft 320 rotates the rotation shafts 310a and 310b by a linear motion in the vertical direction, when the plurality of rotation projections face forward, the first region 212 and the second region where the rotation projections are located 214 is pressed forward so that the display panel 200 is bent with a constant curvature.

At this time, the rotation shafts 310a and 310b of the curvature control unit 300 simultaneously press the first region 212 and the second region 214 of the display panel 200 with the same force, so that the display panel 200 is It is preferable to bend this symmetrically.

Accordingly, the rotation protrusions provided on the rotation shafts 310a and 310b in order to press the display panel 200 from the rear surface of the display panel 200 have the same shape at the same distance from the center of the display panel 200 . It is preferable to form

3 is an exploded perspective view of a curvature control unit in the curvature variable display device according to an embodiment of the present specification.

Referring to FIG. 3 , the curvature control unit 300 coupled to the rear surface of the display panel 200 in the variable curvature display device 100 according to an embodiment of the present specification is disposed in one direction of the display panel 200 , , one or more rotation shafts (310a, 310b) for pressing the display panel 200 from the rear side by rotational movement, and one or more rotations by a linear motion in the vertical direction in a state coupled to the one or more rotation shafts (310a, 310b) It may be formed of a vertical shaft 320 for rotating the shafts 310a and 310b.

In order to press the entire surface of the display panel 200 with the same force, it is effective to configure two or more rotation shafts 310a and 310b, and here, based on the horizontal central portion with respect to the longitudinal direction of the display panel 200 . The first rotation shaft 310a disposed on the upper portion and the second rotation shaft 310b disposed on the lower portion are illustrated.

On the other hand, the curvature control unit 300 may be configured using one rotation shaft 310 . In this case, the rotation shaft 310 may be disposed in the longitudinal direction in the horizontal central portion of the display panel 200 . .

The first rotation shaft 310a and the second rotation shaft 310b are disposed to be elongated in the long axis direction of the display panel 200, and cross the first region 212 and the second region 214 that are bent by the pressure of the rear surface. It will be arranged so that it can be placed in a straight line.

In addition, the first rotation shaft 310a and the second rotation shaft 310b press the display panel 200 from the rear side by rotational motion, so that the display panel 200 can be bent to a certain curvature. ) may be formed to be slightly shorter than the length in the longitudinal direction of the bending.

The first rotation shaft 310a and the second rotation shaft 310b extend in the longitudinal direction of the display panel 200 and at least one rotation protrusion 314a capable of pressing the display panel 200 forward by rotational motion. , 314b, 316a, 316b) respectively.

Here, a case in which two rotation protrusions 314a, 314b, 316a, and 316b are formed on both sides of the center of the first rotation shaft 310a and the second rotation shaft 310b is illustrated as an example.

The rotation protrusions 314a, 314b, 316a, and 316b are coupled to or integrally formed with the first rotation shaft 310a and the second rotation shaft 310b, respectively, and the display panel 200 is in a flat state in which it is maintained in a flat shape. In the case of a flat section that can be arranged parallel to the rear surface of the display panel 200 and when the display panel 200 is pressed in a curved shape, the rotational motion of the first rotating shaft 310a and the second rotating shaft 310b It consists of a protrusion section that can press the display panel 200 from the rear.

When the display panel 200 is bent in a curved shape by the curvature control unit 300, since the edge portion of the display panel 200 is bent the largest distance, the first rotation shaft 310a and the second rotation shaft ( It is preferable that the rotation protrusions 314a , 314b , 316a , and 316b formed on the 310b have a larger protrusion section toward the edge of the display panel 200 .

That is, the first rotational protrusions 314a and 314b located farthest from the central portion of the first rotational shaft 310a and the second rotational shaft 310b are the second rotational projections 316a, which are located close to the central portion of the first rotational shaft 310a, 316b), the protrusion section will be formed larger.

The first rotation shaft 310a and the second rotation shaft 310b are coupled to a vertical shaft 320 formed in a vertical direction, and the first rotation shaft 310a and the second rotation shaft 320 by the vertical movement of the vertical shaft 320 The shaft 310b may be rotated.

The vertical shaft 320 may have a structure coupled to the first rotation shaft 310a and the second rotation shaft 310b, and may have an integrated structure with the first rotation shaft 310a and the second rotation shaft 310b. may be

The vertical shaft 320 crosses the longitudinal direction of the first rotation shaft 310a and the second rotation shaft 310b so as to effectively transmit the rotational force to the first rotation shaft 310a and the second rotation shaft 310b. It may be coupled through the protruding coupling portion (318a, 318b) protruding to the.

Accordingly, the vertical motion of the vertical shaft 320 is transferred to the rotational motion through the protrusion coupling portions 318a and 318b, and the rotational protrusion is generated by the rotational movement of the first rotational shaft 310a and the second rotational shaft 310b. Reference numerals 314a, 314b, 316a, and 316b press the rear surface of the display panel 200 according to the size of each protruding section, thereby bending the display panel 200 to a predetermined curvature.

At this time, the first rotation shaft 310a and the second rotation shaft 310b are stably coupled to the display panel 200 on the rear surface of the display panel 200 , and the first rotation shaft 310a and the second rotation shaft 310b are stably coupled to the display panel 200 . Rotational shaft coupling hinges 220a and 220b that enable the rotational movement of the 310b may be provided.

The rotation shaft coupling hinges 220a and 220b may be formed in two or more pairs at each position so that the first rotation shaft 310a and the second rotation shaft 310b can be fixed in the longitudinal direction.

Accordingly, the first rotation shaft 310a is capable of rotational movement in a state coupled to the first rotation shaft coupling hinge 220a disposed on the rear surface of the display panel 200 , and the second rotation shaft 310b is the display panel 200 . A rotational movement is possible in a state coupled to the second rotation shaft coupling hinge 220b disposed on the rear surface of the panel 200 .

In addition, the rear surface of the display panel 200 may further include a vertical shaft coupling hinge 230 that enables the vertical movement of the vertical shaft 320 while stably supporting the vertical shaft 320 .

The vertical shaft coupling hinge 230 has a structure surrounding the vertical shaft 320 so that the vertical shaft 320 can perform vertical movement at a fixed position while one side is attached to the rear surface of the display panel 200 . can

4 is a diagram illustrating a structure of a rotation shaft in a curvature variable display device according to an embodiment of the present specification.

Referring to FIG. 4 , the rotation shaft 310a constituting the curvature control unit 300 in the curvature variable display device 100 according to an embodiment of the present specification extends in the longitudinal direction of the display panel 200 and rotates. At least one rotational protrusion 314a and 316a capable of pressing the display panel 200 forward is provided.

The rotation protrusions 314a and 316a are respectively symmetrical on both sides with respect to the central portion of the rotation shaft 310a, and one or more may be formed between the central portion and the end portion of the rotation shaft 310a.

Here, a case in which two rotation protrusions 314a and 316a are formed on both sides of the central portion of the rotation shaft 310a is illustrated.

The rotation protrusions 314a and 316a may be integrally formed with the rotation shaft 310a, and in a flat state in which the display panel 200 is maintained in a flat shape, a flat section that may be disposed in parallel with the rear surface of the display panel 200 When the FS and the display panel 200 are bent in a curved shape, they are formed of a protrusion section CS that can press the display panel 200 from the rear side by the rotational movement of the rotation shaft 310a.

The flat section FS of the rotation protrusions 314a and 316a is an area in contact with the rear surface of the display panel 200 by the rotational movement of the rotation shaft 310a in a planar state in which the display panel 200 is maintained in a flat shape. .

The protrusion section CS of the rotating protrusions 314a and 316a is formed on the rear surface of the display panel 200 by the rotational movement of the rotating shaft 310a when the display panel 200 is pressed into a curved shape having a constant curvature. It is a contact area.

Since the protrusion section CS of the rotation protrusions 314a and 316a is a region that presses the rear surface of the display panel 200 , it is preferable to be made of a streamlined flexible material.

At this time, when the display panel 200 is bent in a curved shape by the curvature control unit 300 , the edge portion of the display panel 200 is bent the greatest distance, so the rotation protrusion formed on the rotation shaft 310a It is preferable that the protrusion section CS of the 314a and 316a increases toward the edge of the display panel 200 .

For example, in the case of the rotating protrusion 314a formed at the end of the rotating shaft 310a, the protruding section CS that is in contact with the rear surface of the display panel 200 by the rotational movement of the rotating shaft 310a is the display panel ( It is preferable that the protruding section CS is also formed to be longer as it moves away from the central portion of the rotation shaft 310a according to the distance from the central portion of the rotation shaft 310a.

On the other hand, when the display panel 200 is curved in a curved shape, along the length in which the rotation shaft 310a extends, the degree of bending increases as the distance from the central portion increases, so the rotation protrusion formed on the rotation shaft 310a ( The lengths of 314a and 316a) are also formed in a structure that increases from the central portion to the end portion.

For example, the length D1 of the first rotational protrusion 314a formed at the position furthest from the central portion of the rotation shaft 310a is the length D1 of the second rotation projection portion 316a formed at the position closest to the central portion of the rotation shaft 310a. It will be formed larger than (D2).

5 is an exemplary screen view of a case in which a display panel is bent to a constant curvature by a curvature control unit in the curvature variable display device according to an exemplary embodiment of the present specification.

Referring to FIG. 5 , the curvature variable display apparatus 100 according to an embodiment of the present specification is a display panel 200 arranged in a vertical direction to display an image and a display panel 200 from the rear side of the display panel 200 . It consists of a curvature control unit 300 that changes the curvature by pressing a partial area of the .

At this time, the one or more rotation shafts 310a and 310b configured in the curvature control unit 300 to press the display panel 200 are formed in the vertical shaft 320 coupled to the rotation shafts 310a and 310b. Rotational motion is caused by motion.

That is, the curvature variable display apparatus 100 of the present invention does not have a structure in which the display panel 200 is moved from the rear to the front in the process of bending the display panel 200 to a constant curvature, but is vertical by the vertical shaft 320 . It has a structure in which the rotation shafts 310a and 310b rotate by movement.

Therefore, since the curvature variable display device 100 of the present invention has a structure in which the rotation shafts 310a and 310b capable of pressing the display panel 200 by the vertical shaft 320 in vertical motion are rotated. , it does not require a large space or a complex structure for controlling the curvature at the rear of the display panel 200, so that the curvature of the display panel 200 can be controlled with a simple structure, and the manufacturing cost is reduced and the display panel 200 It has the advantage of being able to configure an area suitable for the thin structure of

The curvature variable display apparatus 100 of the present invention may variously control the curvature of the display panel 200 according to the rotation angle of the rotation shafts 310a and 310b.

6 is a view illustrating various examples of a case in which a curvature of a display panel is changed by a curvature control unit in a curvature variable display device according to an embodiment of the present specification.

Referring to FIG. 6 , the curvature variable display apparatus 100 according to an embodiment of the present specification may change the curvature of the display panel 200 by the curvature control unit 300 located on the rear surface of the display panel 200 . can

At this time, the rotation shafts 310a and 310b that press a partial region of the display panel 200 from the rear surface of the display panel 200 are vertical shafts 320 that transmit rotational force to the rotation shafts 310a and 310b by vertical motion. ), the rotation angle can be controlled.

For example, when the vertical shaft 320 is located at the lowest height, the rotational protrusions 314a and 314b attached to the rotational shafts 310a and 310b display a flat flat section FS in a vertically arranged state. It is in contact with the rear surface of the panel 200, and in this state, the display panel 200 maintains a flat state (refer to FIG. 6(a) ).

In this state, when the vertical shaft 320 rises in the vertical direction, the rotating shafts 310a and 310b rotate by the force of the vertical shaft 320 pushing up the protruding coupling portions 318a and 318b. .

Due to the vertical shaft 320, the rotation shafts 310a and 310b rotate in a downward direction, and the rotation protrusions 314a and 314b formed on the rotation shafts 310a and 310b also rotate downward accordingly. In this process, the rear region of the display panel 200 in contact with the rotation protrusions 314a and 314b is pressed forward to change into a curved shape (refer to FIG. 6(b) ).

When the vertical shaft 320 rises to the highest position, the rotating shafts 310a and 310b rotate at a maximum angle, and in this state, the rotating protrusions 314a and 314b formed on the rotating shafts 310a and 310b are displayed on the display panel. It is positioned in a horizontal state that presses 200 to the maximum distance (see FIG. 6(c)).

In this case, the area in contact with the rotational projections 314a and 314b moves forward by the distance D1 of the rotational projections 314a and 314b, compared to when the display panel 200 is in a planar state, so that the display panel 200 is moved forward. ) is bent to the maximum curvature.

As described above, in the case where the display panel 200 is in a flat state (FIG. 6(a)) and when the display panel 200 is bent to the maximum curvature according to the degree of vertical movement of the vertical shaft 320, the curvature variable display device 100 of the present invention is ( The curvature may be varied in the interval shown in FIG. 6(c)).

On the other hand, in the above, the vertical shaft 320 has been described as an example of rotating the rotation shafts 310a and 310b by ascending in the vertical direction, but according to the structure, the vertical shaft 320 descends in the vertical direction to thereby , 310b) may be configured to rotate.

7 is a plan view illustrating a case in which a display panel is bent to a maximum curvature by a curvature control unit in a curvature variable display device according to an exemplary embodiment of the present specification.

Referring to FIG. 7 , the curvature variable display apparatus 100 according to an exemplary embodiment of the present specification may be changed to the curvature of the display panel 200 by the curvature control unit 300 .

At this time, the maximum curvature at which the display panel 200 can be bent forward is when the rotation protrusions 314a and 314b formed on the rotation shaft 310a are positioned in a horizontal state toward the front of the display panel 200 . will be.

At this time, the curvature of the display panel 200 is determined by the distance L1 from the central portion to the first rotation protrusion 314a formed at the farthest position of the rotation shaft 310a and the first pressing the display panel 200 forward. It may be determined by the length D1 of the one-turn protrusion 314a.

On the other hand, the vertical shaft 320 that controls the rotational movement of the rotation shafts 310a and 310b to press the display panel 200 forward from the rear surface of the display panel 200 extends in a direction parallel to the rotation shaft 320 . Or it may be mechanically controlled by a structure extending in a different direction from the rotating shaft 320, or electrically controlled by a system connected thereto.

Considering the case in which the first region 212 and the second region 214 of the display panel 200 are bent with the same curvature, the rotation protrusions 314a and 316a formed on the rotation shafts 310a and 310b are located at the center of the display panel 200 . A case in which the structure was formed in a symmetrical structure on both sides based on the part was described.

However, the display panel 200, which is curved in a curved shape, may be curved with different curvatures rather than left-right symmetry. In this case, the shape of the rotation protrusions 314a and 316a formed on the rotation shafts 310a and 310b may be changed by forming an asymmetric structure.

The above description is merely illustrative of the technical idea of the present invention, and various modifications and variations will be possible without departing from the essential characteristics of the present invention by those skilled in the art to which the present invention pertains. In addition, the embodiments disclosed in the present invention are not intended to limit the technical spirit of the present invention, but rather to explain, so the scope of the technical spirit of the present invention is not limited by these embodiments. The protection scope of the present invention should be interpreted by the following claims, and all technical ideas within the scope equivalent thereto should be construed as being included in the scope of the present invention.

100: curvature variable display device
200: display panel
210: soft case
212: first area
214: second area
220a, 220b: rotating shaft coupling hinge
230: vertical shaft mating hinge
300: curvature control unit
310a, 310b: rotating shaft
314a, 314b, 316a, 316b: rotating protrusions
318a, 318b: protruding joint
320: vertical shaft

Claims (13)

flexible display panel; and
and a curvature control unit coupled to the flexible display panel from a rear side and configured to control the flexible display panel to be bent at an arbitrary curvature by rotating the rotating shaft at an arbitrary angle due to vertical motion of the vertical shaft.
The method of claim 1,
The flexible display panel
A curvature variable display device which is one of an organic light emitting display panel, an electrophoretic display panel, a liquid crystal display panel, and an electrowetting display panel.
The method of claim 1,
The curvature control unit is
one or more rotation shafts extending in a first direction of the flexible display panel and pressing the flexible display panel by rotational motion; and
and a vertical shaft disposed in a second direction of the flexible display panel in a state coupled to the one or more rotation shafts and configured to rotate the one or more rotation shafts by linear motion in the second direction.
4. The method of claim 3,
the one or more rotating shafts
A curvature-variable display device having one or more rotational protrusions capable of pressing the flexible display panel forward by rotational motion.
5. The method of claim 4,
The rotating protrusion
A curvature variable display device formed in a structure symmetrical on both sides with respect to the central portion of the rotation shaft.
5. The method of claim 4,
The rotating protrusion
A curvature-variable display device in which a protrusion length is formed to be larger as the distance from the central portion of the rotation shaft increases.
5. The method of claim 4,
The rotating protrusion
a flat section that can be arranged in parallel with a rear surface of the flexible display panel in a flat state in which the flexible display panel is maintained in a flat shape; and
and a protrusion section capable of pressing the flexible display panel from the rear side by a rotational movement of the rotation shaft when the flexible display panel is pressed in a curved shape.
8. The method of claim 7,
The protruding section is
A curvature variable display device that is formed to be larger toward an edge of the flexible display panel.
9. The method of claim 8,
The protruding section is
A curvature variable display device made of a streamlined flexible material.
4. The method of claim 3,
The curvature control unit is
The curvature variable display apparatus further comprising a protrusion coupling part that protrudes in a direction crossing the first direction in which the rotation shaft extends and is coupled to the vertical shaft.
11. The method of claim 10,
The rotation shaft, the vertical shaft, and the protruding coupling portion is a curvature variable display device made of an integral structure.
4. The method of claim 3,
The flexible display panel
Curvature variable display device further comprising a rotation shaft coupling hinge that enables the rotational movement of the rotation shaft in a state in which the rotation shaft is coupled.
4. The method of claim 3,
The flexible display panel
In a state in which the vertical shaft is coupled, the display device of a variable curvature further comprising a vertical shaft coupling hinge that enables vertical movement of the vertical shaft.

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