Slide display device

Abstract

The present application relates to a scrolling display device, comprising: a flexible display screen, a scrolling shaft and a motion track control member, wherein the flexible display screen is wound around the scrolling shaft; the motion track control member is used to control the trajectory of the scrolling shaft moving between a first position and a second position, so as to drive the flexible display screen to unfold or rewind; wherein, when the scrolling shaft is in the first position, the flexible display screen is in a retracted state, and when the scrolling shaft is in the second position, the flexible display screen is in an unfolded state, the second position is away from the first end of the flexible display screen along the first direction and the second direction relative to the first position, the first end of the flexible display screen is an end of the exposed part of the flexible display screen away from the scrolling shaft, the first direction is parallel to the display surface of the exposed part of the flexible display screen; the second direction is the direction from the display surface of the exposed part of the flexible display screen to the non-display surface opposite to the display surface. The embodiment of the present application can improve the flatness of the display surface of the flexible display screen to improve the user experience.

Description

Technical Field

[0001] The present application relates to the field of display technology, and in particular to a scrolling display device. Background Art

[0002] Compared with traditional displays, flexible displays have the advantages of being bendable, flexible, and lightweight, and are currently receiving widespread attention. As a new form of display device, the roll-up display device can significantly reduce the size of the product while expanding the display area of ​​the screen, so that the product can not only meet the user experience of a large screen and a wide field of view, but also have good portability.

[0003] In the scrolling display device of the related art, the flexible display screen can be unfolded or retracted as the scrolling shaft moves horizontally. In the unfolding process of the flexible display screen, the part where the flexible display screen contacts the scrolling shaft will bulge, especially when the flexible display screen is fully unfolded, the bulge is most obvious. The local bulge of the flexible display screen makes the end close to the scrolling shaft slightly higher and the end away from the scrolling shaft slightly lower, so that the display surface of the flexible display screen seen by the user is not flat, affecting the user experience. Summary of the invention

[0004] Based on this, it is necessary to provide a sliding display device, aiming to improve the problem of poor flatness of the display surface after the flexible display screen is unfolded.

[0005] According to one aspect of the present application, a scrolling display device is provided, comprising:

[0006] Flexible display screen;

[0007] A sliding scroll, on which the flexible display screen is wound;

[0008] A motion track control member, used to control the track of the sliding scroll shaft moving between the first position and the second position, so as to drive the flexible display screen to unfold or retract;

[0009] Among them, when the sliding scroll is in the first position, the flexible display screen is in a rolled-up state, and when the sliding scroll is in the second position, the flexible display screen is in an unfolded state. The second position is away from the first end of the flexible display screen along the first direction and the second direction relative to the first position. The first end of the flexible display screen is an end of the exposed part of the flexible display screen away from the sliding scroll. The first direction is parallel to the display surface of the exposed part of the flexible display screen; the second direction is the direction from the display surface of the exposed part of the flexible display screen to the non-display surface opposite to the display surface.

[0010] By setting a motion trajectory control member, the trajectory of the sliding scroll moving between the first position and the second position can be controlled. Wherein, when the sliding scroll is in the first position, the flexible display screen is in a reeled state, and when the sliding scroll is in the second position, the flexible display screen is in an unfolded state, and the second position is away from the first end of the flexible display screen along the first direction and the second direction relative to the first position. This makes the sliding scroll move a distance in the direction from the display surface of the exposed part of the flexible display screen to the non-display surface opposite to the display surface when the sliding scroll moves from the first position to the second position. After the flexible display screen is fully unfolded, although the part where the flexible display screen contacts the sliding scroll has a more obvious bulge, the sliding scroll also moves a distance in the opposite direction to the bulge. Therefore, the movement of the sliding scroll and the local bulge of the flexible display screen offset each other, thereby improving the phenomenon that one end of the flexible display screen is high and the other end is low after the flexible display screen is fully unfolded, and then the flatness of the display surface of the flexible display screen can be improved to improve the user experience of the sliding scroll display device.

[0011] In some embodiments, during the movement of the scroll shaft from the first position to the second position, the distance between the scroll shaft and the first end of the flexible display screen along the second direction increases monotonically;

[0012] When the scroll bar moves from the second position to the first position, the distance between the scroll bar and the first end of the flexible display screen along the second direction decreases monotonically.

[0013] In some embodiments, the sliding reel is configured to move between the first position and the second position in a curved motion trajectory.

[0014] In some embodiments, the sliding reel is configured to move between the first position and the second position in a parabolic motion trajectory.

[0015] In some embodiments, along the second direction, when the scroll is in the second position, the distance between the tangential contact point between the exposed portion of the flexible display and the scroll and the first end of the flexible display is a first distance greater than or equal to 0.5 mm and less than or equal to 1.5 mm.

[0016] In some embodiments, when the scroll is in the first position, the distance between the tangential contact point between the exposed portion of the flexible display screen and the scroll and the first end of the flexible display screen along the second direction is greater than or equal to 0 and less than or equal to 0.2 mm.

[0017] In some embodiments, the sliding scroll rotates around its own axis during the movement between the first position and the second position, and the first direction is perpendicular to the axis of the sliding scroll.

[0018] In some embodiments, the scrolling display device further includes a main frame and a border, the first end of the flexible display screen is connected to the main frame, the border can be configured to be away from or close to the main frame, and the scrolling shaft is connected to the border in a manner that allows it to rotate around its own axis.

[0019] In some embodiments, the motion trajectory control member is slidably connected to at least one of the two ends of the sliding scroll that are opposite to each other in the axial direction;

[0020] In some embodiments, the motion trajectory control member is provided with a guide rail for limiting the motion trajectory of the sliding roller. The sliding roller is slidably connected to the guide rail. When the sliding roller moves to one end of the guide rail, it is in a first position. When the sliding roller moves to the other end of the guide rail, it is in a second position.

[0021] In some embodiments, the guide rail includes a slide groove or a protrusion, and at least one of the two ends of the sliding reel opposite to each other in the axial direction is provided with a convex portion or a concave portion that is concavely engaged with the guide rail.

[0022] In some embodiments, the scrolling display device further includes a shell, the main frame and the motion track control element are fixedly disposed in the shell, and the frame is slidably disposed in the shell.

[0023] In some embodiments, the scroll includes a main body and a sliding fitting portion provided at at least one of two axially opposite ends of the main body, the flexible display screen is wound around the main body, and the sliding fitting portion is slidably connected to the guide rail.

[0024] In some embodiments, there are two sliding fitting parts, which are arranged at two opposite ends of the main body along the axial direction. There are two motion trajectory control members, and each sliding fitting part is slidably connected to the guide rail of a corresponding motion trajectory control member.

[0025] In some embodiments, both the main body and the sliding fitting portion are cylindrical structures, and the diameter of the sliding fitting portion is smaller than the diameter of the main body.

[0026] In some embodiments, the sliding display device further includes a pulling component connected to the second end of the flexible display screen to provide a pulling force to tension the flexible display screen.

[0027] In some embodiments, the pulling assembly includes a motor and a transmission component connected to the motor, and the transmission component is connected to the second end of the flexible display screen.

[0028] In some embodiments, the pulling assembly includes at least one spring connected to the second end of the flexible display screen. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 It is a structural schematic diagram of a sliding display device in the related art when it is in a rolled-up state;

[0030] Figure 2 It is a structural schematic diagram of a sliding display device in the related art when it is in an unfolded state;

[0031] Figure 3 is a structural schematic diagram of a scrolling display device in an embodiment of the present application;

[0032] Figure 4 A schematic diagram of some parameters in a scrolling display device in an embodiment of the present application;

[0033] Figure 5 It is a schematic diagram of the structure of a sliding scroll in an embodiment of the present application;

[0034] Figure 6 Schematic diagram of the structure of a scrolling display device in another embodiment of the present application. DETAILED DESCRIPTION

[0035] In order to facilitate the understanding of the present application, the present application will be described more fully below with reference to the relevant drawings. The preferred embodiments of the present application are provided in the drawings. However, the present application can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the understanding of the disclosure of the present application more thorough and comprehensive.

[0036] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art to which this application belongs. The terms used herein in the specification of this application are only for the purpose of describing specific embodiments and are not intended to limit this application. The term "and / or" used herein includes any and all combinations of one or more of the related listed items.

[0037] When describing positional relationships, unless otherwise specified, when an element such as a layer, film, or substrate is referred to as being "on" another element, it can be directly on the other element or there can be intervening elements. Further, when a layer is referred to as being "under" another layer, it can be directly below or there can be one or more light-emitting units. It is also understood that when a layer is referred to as being "between" two layers, it can be the only layer between the two layers or there can be one or more light-emitting units.

[0038] In the case of using “including”, “having”, and “comprising” described herein, another component may be added unless a clear limiting term such as “only”, “consisting of”, etc. is used. Unless mentioned otherwise, a term in the singular form may include a plural form and should not be understood as being one in number.

[0039] It should be understood that although the terms "first", "second", etc. may be used herein to describe various elements, these elements should not be limited by these terms. These terms are only used to distinguish one element from another element. For example, a first element may be referred to as a second element, and similarly, a second element may be referred to as a first element without departing from the scope of the present application.

[0040] It should also be understood that when interpreting an element, even if not explicitly described, the element is interpreted as including a range of error, which should be within the acceptable deviation range of the specific value determined by those skilled in the art. For example, "approximately", "approximately" or "substantially" can mean within one or more standard deviations, which are not limited here.

[0041] Furthermore, in the specification, the phrase “planar distribution schematic diagram” refers to a drawing when a target portion is viewed from above, and the phrase “cross-sectional schematic diagram” refers to a drawing when a section taken by vertically cutting the target portion is viewed from the side.

[0042] In addition, the drawings are not drawn to a 1:1 scale, and the relative sizes of the elements in the drawings are drawn only as examples and not necessarily according to the true scale.

[0043] Compared with traditional displays, flexible displays have the advantages of being bendable, flexible, and lightweight, and are currently receiving widespread attention. As a new form of display device, the roll-up display device can significantly reduce the size of the product while expanding the display area of ​​the screen, so that the product can not only meet the user experience of a large screen and a wide field of view, but also have good portability.

[0044] like Figure 1 , Figure 2 As shown, in the sliding display device in the related art, one end of the flexible display screen 2 is connected to the main frame 3, and the sliding scroll 1 can move relative to the main frame 3, thereby moving away from or close to the main frame 3. With the movement of the sliding scroll 1, the flexible display screen 2 can be unfolded or rolled up. Among them, during the unfolding process of the flexible display screen 2, the part where the flexible display screen 2 contacts the sliding scroll 1 (equivalent to the part to be revealed) will bulge, especially when the flexible display screen is fully unfolded, the bulge is most obvious. The local bulge of the flexible display screen makes the end close to the sliding scroll slightly higher, while the end away from the sliding scroll is slightly lower, so that the display surface flatness of the flexible display screen seen by the user is not good, affecting the user experience.

[0045] In view of the above problems, an embodiment of the present application proposes a sliding display device, which aims to improve the problem of poor flatness of the display surface after the flexible display screen is unfolded.

[0046] like Figure 3As shown, the scroll display device 10 in the embodiment of the present application includes a flexible display screen 200, a scroll shaft 300 and a motion track control member 400. Specifically, the flexible display screen 200 is wound around the scroll shaft 300, and the motion track control member 400 is used to control the trajectory of the scroll shaft 300 moving between the first position P1 and the second position P2, so as to drive the flexible display screen 200 to unfold or rewind. Wherein, when the scroll shaft 300 is in the first position P1, the flexible display screen 200 is in a retracted state, and when the scroll shaft 300 is in the second position P2, the flexible display screen 200 is in an unfolded state, and the second position P2 is away from the first end 201 of the flexible display screen 200 (that is, the end of the exposed part of the flexible display screen 200 away from the scroll shaft 300, which can be called a fixed end) along the first direction and the second direction relative to the first position P1. The first direction is parallel to the display surface of the exposed part of the flexible display screen 200, and the second direction is the direction from the display surface of the exposed part of the flexible display screen 200 to the non-display surface opposite to the display surface.

[0047] The scroll display device 10 may be, for example, a display, a television, a digital camera, a mobile phone, a tablet computer, a navigator, or any other product or component with a display function.

[0048] The scroll display device 10 in the embodiment of the present application can control the trajectory of the scroll shaft 300 moving between the first position P1 and the second position P2 by providing a motion trajectory control member 400. When the scroll shaft 300 is in the first position P1, the flexible display screen 200 is in a rolled-up state, and when the scroll shaft 300 is in the second position P2, the flexible display screen 200 is in an unfolded state. The second position P2 is away from the first end 201 of the flexible display screen 200 along the first direction and the second direction relative to the first position P1. Along the first direction, the distance between the sliding scroll 300 and the first end 201 of the flexible display screen 200 when the sliding scroll 300 is in the first position P1 is smaller than the distance between the sliding scroll 300 and the first end 201 of the flexible display screen 200 when the sliding scroll 300 is in the second position P2. That is to say, in the first direction, the first position P1 is closer to the first end 201 of the flexible display screen 200, and the second position P2 is farther from the first end 201 of the flexible display screen 200. This means that the movement of the sliding scroll 300 from the first position P1 to the second position P2 indicates movement in a direction away from the first end 201 of the flexible display screen 200, and the movement of the sliding scroll 300 from the second position P2 to the first position P1 indicates movement in a direction close to the first end 201 of the flexible display screen 200. Since the flexible display screen 200 is wound on the sliding scroll 300, when the sliding scroll 300 moves in a direction away from the first end 201 of the flexible display screen 200, it can drive the flexible display screen 200 to unfold, and when the sliding scroll 300 moves in a direction close to the first end 201 of the flexible display screen 200, it can drive the flexible display screen 200 to retract.

[0049] In addition, along the second direction, the distance between the sliding scroll 300 and the first end 201 of the flexible display screen 200 when the sliding scroll 300 is in the first position P1 is less than the distance between the sliding scroll 300 and the first end 201 of the flexible display screen 200 when the sliding scroll 300 is in the second position P2. This makes the sliding scroll 300 move a distance in the direction from the display surface of the exposed part of the flexible display screen 200 to the non-display surface opposite to the display surface when the sliding scroll 300 moves from the first position P1 to the second position P2. After the flexible display screen 200 is fully unfolded, although the part where the flexible display screen 200 contacts the sliding scroll 300 has a more obvious bulge, the sliding scroll 300 also moves a distance in the opposite direction of the bulge. Therefore, the movement of the sliding scroll 300 and the local bulge of the flexible display screen 200 offset each other, thereby improving the phenomenon that one end of the flexible display screen 200 is high and the other end is low after the flexible display screen 200 is fully unfolded, and then the flatness of the display surface of the flexible display screen 200 can be improved to improve the user experience of the sliding display device 10. During the rolling process of the flexible display screen 200 , the flatness of the exposed portion of the flexible display screen 200 is improved by adjusting the position of the center of the rolling axis 300 during the sliding process.

[0050] In some embodiments, optionally, during the movement of the scroll 300 from the first position P1 to the second position P2, the distance between the scroll 300 and the first end 201 of the flexible display screen 200 gradually increases along the first direction, and at the same time, the distance between the scroll 300 and the first end 201 of the flexible display screen 200 gradually increases along the second direction. During the movement of the scroll 300 from the second position P2 to the first position P1, the distance between the scroll 300 and the first end 201 of the flexible display screen 200 gradually decreases along the first direction, and at the same time, the distance between the scroll 300 and the first end 201 of the flexible display screen 200 gradually decreases along the second direction.

[0051] In some embodiments, during the movement of the scroll 300 from the first position P1 to the second position P2, the distance between the scroll 300 and the first end 201 of the flexible display screen 200 along the second direction increases monotonically; during the movement of the scroll 300 from the second position P2 to the first position P1, the distance between the scroll 300 and the first end 201 of the flexible display screen 200 along the second direction decreases monotonically. Since the movement of the scroll 300 from the first position P1 to the second position P2 corresponds to the unfolding process of the flexible display screen 200, the inventor of the present application has found through a large number of tests that as the flexible display screen 200 gradually unfolds, the degree of bulge of the flexible display screen 200 at the contact position with the scroll 300 becomes more and more obvious. According to the above test results, the embodiment of the present application controls the movement trajectory of the sliding scroll 300 so that as the flexible display screen 200 gradually unfolds, the movement stroke of the sliding scroll 300 in the direction opposite to the bulge gradually increases. As a result, the movement distance of the sliding scroll 300 in the second direction is roughly equivalent to the degree of bulge of the flexible display screen 200, thereby ensuring that the flatness of the display screen can always be improved during the unfolding process of the flexible display screen 200.

[0052] It can be understood that, in contrast to the unfolding process, the process in which the sliding scroll 300 moves from the second position P2 to the first position P1 corresponds to the rolling process of the flexible display screen 200. The inventor's test also shows that as the flexible display screen 200 is rolled up, the degree of bulge of the flexible display screen 200 at the contact position with the sliding scroll 300 gradually decreases. According to the above test results, the embodiment of the present application also controls the movement trajectory of the sliding scroll 300 so that as the flexible display screen 200 is gradually rolled up, the sliding scroll 300 moves in the opposite direction, thereby making the moving distance of the sliding scroll 300 in the second direction substantially equivalent to the degree of bulge of the flexible display screen 200, thereby ensuring that the flatness of the flexible display screen 200 can also be improved during the rolling process of the flexible display screen 200.

[0053] Furthermore, the scroll 300 can be configured to move between the first position P1 and the second position P2 along a curved motion trajectory, or can be configured to move between the first position P1 and the second position P2 along a straight motion trajectory (the straight line can intersect with the non-display surface or the display surface of the exposed portion of the flexible display screen 200 away from the end of the scroll 300), so as to meet the requirement that the distance between the scroll 300 and the first end 201 of the flexible display screen 200 along the second direction increases monotonically during the movement of the scroll 300 from the first position P1 to the second position P2, and the requirement that the distance between the scroll 300 and the first end 201 of the flexible display screen 200 along the second direction decreases monotonically during the movement of the scroll 300 from the second position P2 to the first position P1.

[0054] In some embodiments, the scroll 300 is configured to move between a first position P1 and a second position P2 in a parabolic motion trajectory. The inventor of the present application has found through testing that in the scroll display device 10 in the related art, the process in which the flexible display screen 200 switches from a retracted state to a fully unfolded state, the bulge formed by the portion of the flexible display screen 200 in contact with the scroll 300, the degree of which generally conforms to the parabolic law as the position of the scroll 300 changes. According to the above test results, and based on the idea that the moving distance of the scroll 300 in the second direction can just offset the bulge on the flexible display screen 200, the embodiment of the present application designs a parabolic motion trajectory for the scroll 300, so that the bulge degree of the flexible display screen 200 matches the moving distance of the scroll 300 in the second direction in real time, so that the flatness of the display surface of the flexible display screen 200 can be improved well whether it is in the unfolding process or the reeling process.

[0055] In some embodiments, along the second direction, when the scroll 300 is in the second position P2, the distance between the exposed part of the flexible display screen 200 and the tangential contact point of the scroll 300 and the first end of the flexible display screen 200 is the first distance, that is, the height difference in the second direction, and the first distance is greater than or equal to 0.5 mm and less than or equal to 1.5 mm. After a large number of tests, the inventor found that when the flexible display screen 200 is in a fully unfolded state, the size of the ridge formed by the part where the flexible display screen 200 contacts the scroll 300 in the second direction is 0.5 mm to 1.5 mm. Therefore, when the scroll 300 is in the second position P2, the distance between the exposed part of the flexible display screen 200 and the tangential contact point of the scroll 300 and the first end of the flexible display screen 200 is greater than or equal to 0.5 mm and less than or equal to 1.5 mm, so that the distance that the scroll 300 moves in the opposite direction to the ridge matches the size of the ridge, thereby improving the flatness of the display surface of the flexible display screen 200.

[0056] In some embodiments, when the scroll 300 is in the first position P1, the distance between the tangential contact point between the exposed portion of the flexible display 200 and the scroll 300 and the first end 201 of the flexible display 200 along the second direction is greater than or equal to 0 and less than or equal to 0.2 mm.

[0057] Since the flexible display screen 200 is in the rolled-up state, the portion where the flexible display screen 200 contacts the scroll 300 does not have a bulge or only has a slight bulge due to the bending stiffness of the flexible display screen 200, therefore, in this embodiment, when the scroll 300 is in the first position P1, the distance between the tangential contact point between the exposed portion of the flexible display screen 200 and the scroll 300 and the first end 201 (the first end 201 is specifically the end point of the non-display surface of the exposed portion of the flexible display screen 200 away from the scroll 300) along the second direction (that is, the height difference in the second direction) is greater than or equal to 0 and less than or equal to 0.2 mm. In other words, when the flexible display screen 200 is in the rolled-up state, the end of the flexible display screen 200 close to the scroll 300 and the end away from the scroll 300 can be flush or nearly flush in the second direction, thereby making the display surface of the flexible display screen 200 in the rolled-up state have good flatness.

[0058] For example, the first direction is equivalent to the x-axis, the second direction is equivalent to the y-axis, and the motion trajectory formula of the scroll 300 can be y=x 2 +c. Please refer to Figure 4 As shown, for the convenience of illustrating various parameters, only the first end 201 of the flexible display screen 200 is drawn, and the coordinates of the sliding scroll 300 when it is in the first position P1 (i.e., the initial position) can be (0, y1), and the coordinates of the sliding scroll 300 when it is in the second position P2 (i.e., the final position) can be (L, y2), wherein L is the sliding distance (i.e., the displacement in the horizontal direction) along the first direction during the sliding of the sliding scroll 300 from the first position P1 to the second position P2. Since when the flexible display screen 200 is in the rolled-up state, the bulge of the part where the flexible display screen 200 contacts the sliding scroll 300 is the smallest (0 to 0.2 mm), and when the flexible display screen 200 is in the fully unfolded state, the bulge of the part where the flexible display screen 200 contacts the sliding scroll 300 is the largest (0.5 mm to 1.5 mm), therefore, the value of y1 can be 0 to 0.2 mm, the value of y2 can be 0.5 to 1.5 mm, and the positive direction of the y-axis is the opposite direction to the "bulge" of the flexible display screen 200. Substituting the values ​​of L, y1, and y2 into the motion trajectory formula, the parameters a and c can be obtained. y1 can be the distance between the tangential contact point between the exposed part of the flexible display screen 200 and the scroll 300 and the first end 201 (the end point of the non-display surface of the exposed part of the flexible display screen 200 away from the scroll 300) along the second direction when the scroll 300 is in the first position P1; y2 can be the distance between the tangential contact point between the exposed part of the flexible display screen 200 and the scroll 300 and the first end 201 along the second direction when the scroll 300 is in the second position P2.

[0059] In some embodiments, the scroll 300 rotates around its own axis during the movement between the first position P1 and the second position P2, and the first direction is perpendicular to the axis of the scroll 300. Thus, the friction between the flexible display 200 and the scroll 300 can be reduced, thereby avoiding wear of the flexible display 200, and further facilitating the service life of the flexible display 200.

[0060] In some embodiments, the scrolling display device 10 further includes a main frame 100 and a frame (not shown in the figure), the first end of the flexible display screen 200 is connected to the main frame 100, the frame can be configured to be away from or close to the main frame 100, and the scrolling shaft 300 is connected to the frame in a manner that can rotate around its own axis. Therefore, by making the frame away from or close to the main frame 100, the scrolling shaft 300 can be driven to move between the first position P1 and the second position P2, so as to drive the flexible display screen 200 to switch between the rolled state and the unfolded state.

[0061] In some embodiments, the motion track control member 400 is slidably connected to at least one of the two axially opposite ends of the sliding reel 300. Thus, the motion track control member 400 can control the movement track of the sliding reel 300 between the first position P1 and the second position P2.

[0062] Further, the motion track control member 400 is provided with a guide rail 410 for limiting the motion track of the scroll 300, the scroll 300 is slidably connected to the guide rail 410, the scroll 300 is in a first position P1 when it moves to one end of the guide rail 410, and is in a second position P2 when it moves to the other end of the guide rail 410. In this embodiment, the scroll display device 10 further includes a motion track control member 400, the scroll 300 is slidably connected to the guide rail 410 on the motion track control member 400, so that the scroll 300 slides along the guide rail 410, thereby, by providing the guide rail 410, it is ensured that the scroll 300 can accurately move along the preset motion track, thereby achieving the purpose of offsetting the local bulge of the flexible display screen 200 through the movement of the scroll 300.

[0063] Optionally, the guide rail 410 includes a slide groove or a protrusion, and at least one of the two ends of the sliding reel 300 opposite in the axial direction is provided with a protrusion or a recess that fits concavely and convexly with the guide rail 410. Optionally, both ends of the sliding reel 300 opposite in the axial direction are provided with a protrusion or a recess that fits concavely and convexly with the guide rail 410. There can be two guide rails 410, and the two guide rails 410 are arranged along the axial direction of the sliding reel 300, and the two guide rails 410 are located at two ends of the sliding reel 300 opposite in the axial direction.

[0064] In some embodiments, the scrolling display device 10 further includes a housing (not shown in the figure), the main frame 100 and the motion track control member 400 are fixedly disposed in the housing, and the frame is slidably disposed in the housing. In an embodiment, the main frame 100, the frame, and the motion track control member 400 are all disposed in the housing of the scrolling display device 10, wherein the main frame 100 and the motion track control member 400 are fixedly disposed in the housing, so that the motion track control member 400 and the main frame 100 always maintain a relatively fixed positional relationship, and the frame is slidably disposed in the housing, so that the frame can drive the scroll shaft 300 to move relative to the main frame 100, so as to facilitate the flexible display screen 200 to be unfolded or rolled up through the scroll shaft 300.

[0065] In some embodiments, Figure 5 , Figure 6 As shown, the sliding scroll 300 includes a main body 310 and a sliding fitting portion 320 disposed at at least one of two opposite ends of the main body 310 along the axial direction, the flexible display screen 200 is wound around the main body 310, and the sliding fitting portion 320 is slidably connected to the guide rail 410. In this embodiment, the sliding scroll 300 includes a main body 310 and a sliding fitting portion 320, wherein the flexible display screen 200 is wound around the main body 310, and the sliding fitting portion 320 is slidably connected to the guide rail 410, thereby enabling different parts of the sliding scroll 300 to perform different functions.

[0066] In some embodiments, Figure 6 As shown, there are two sliding fitting parts 320, which are arranged at two opposite ends of the main body 310 along the axial direction, and there are two motion track control members 400, each of which is slidably connected to the guide rail 410 of a corresponding motion track control member 400. Such an arrangement can make the connection between the sliding reel 300 and the motion track control member 400 more stable, thereby facilitating the improvement of the motion stability of the sliding reel 300 when sliding along the guide rail 410.

[0067] In some embodiments, the main body 310 and the sliding fitting part 320 are both cylindrical structures, and the diameter of the sliding fitting part 320 is smaller than the diameter of the main body 310. In this embodiment, the sliding fitting part 320 is arranged at the end of the main body 310, and the diameter of the sliding fitting part 320 is smaller than the diameter of the main body 310, thereby forming a step structure between the sliding fitting part 320 and the main body 310, and the step surface in the step structure can be against the motion trajectory control member 400, so that the sliding reel 300 will not be offset in the direction of its axis.

[0068] In some embodiments, the rolling display device 10 further includes a pulling assembly 500, which is connected to the second end 202 of the flexible display screen 200 (i.e., the end of the hidden part of the flexible display screen 200 away from the rolling axis, which may be referred to as the sliding end) to provide a pulling force to tighten the flexible display screen 200. In this embodiment, the pulling assembly 500 provides a pulling force to the second end 202 of the flexible display screen 200. Under the action of the pulling force, the flexible display screen 200 can remain generally flat and avoid wrinkles whether it is converted from a rolled state to an unfolded state or from an unfolded state to a rolled state.

[0069] In some embodiments, the pulling assembly 500 may include a motor and a transmission component connected to the motor, and the transmission component is connected to the second end 202 of the flexible display screen 200. In this embodiment, the motor and the transmission component can provide a stable pulling force to the second end 202 of the flexible display screen 200, thereby avoiding damage to the flexible display screen 200 caused by a sharp change in the pulling force.

[0070] In some other embodiments, the pulling assembly 500 includes at least one spring connected to the second end 202 of the flexible display screen 200. In this embodiment, a relatively low-cost spring is used to provide a pulling force to the second end 202 of the flexible display screen 200, which is beneficial to reducing the manufacturing cost of the scrolling display device 10.

[0071] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0072] The above-mentioned embodiments only express several implementation methods of the present application, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the invention patent. It should be pointed out that, for a person of ordinary skill in the art, several variations and improvements can be made without departing from the concept of the present application, and these all belong to the protection scope of the present application. Therefore, the protection scope of the patent of the present application shall be subject to the attached claims.

Claims

1. A scroll display device, characterized in that: include: Flexible display screen; A sliding scroll, the flexible display screen is wound around the sliding scroll; A motion track control member, used for controlling the track of the sliding scroll between the first position and the second position, so as to drive the flexible display screen to unfold or retract; Wherein, when the sliding scroll is in the first position, the flexible display screen is in a rolled-up state; when the sliding scroll is in the second position, the flexible display screen is in an unfolded state; the second position is away from the first end of the flexible display screen along the first direction and the second direction relative to the first position; the first end of the flexible display screen is an end of the exposed part of the flexible display screen away from the sliding scroll; the first direction is parallel to the display surface of the exposed part of the flexible display screen; the second direction is a direction from the display surface of the exposed part of the flexible display screen to a non-display surface opposite to the display surface; the motion trajectory control member is slidably connected to at least one of the two ends of the sliding scroll along the axial direction; the motion trajectory control member is provided with a guide rail for limiting the motion trajectory of the sliding scroll; the sliding scroll is slidably connected to the guide rail; the sliding scroll is in the first position when it moves to one end of the guide rail; and the sliding scroll is in the second position when it moves to the other end of the guide rail.

2. The scroll display device according to claim 1, characterized in that: When the scroll shaft moves from the first position to the second position, the distance between the scroll shaft and the first end of the flexible display screen along the second direction increases monotonically; During the movement of the sliding scroll from the second position to the first position, the distance between the sliding scroll and the first end of the flexible display screen along the second direction decreases monotonically.

3. The scroll display device according to claim 2, characterized in that: The sliding reel is configured to move between the first position and the second position in a curved motion trajectory.

4. The scroll display device according to claim 3, characterized in that: The sliding reel is configured to move between the first position and the second position in a parabolic motion trajectory.

5. The scroll display device according to claim 1, characterized in that: Along the second direction, when the sliding scroll is in the second position, the distance between the tangential contact point between the exposed part of the flexible display screen and the sliding scroll and the first end of the flexible display screen is a first distance greater than or equal to 0.5 mm and less than or equal to 1.5 mm.

6. The scroll display device according to claim 1, characterized in that: When the scroll is in the first position, the distance between the tangential contact point between the exposed portion of the flexible display and the scroll and the first end of the flexible display along the second direction is greater than or equal to 0 and less than or equal to 0.2 mm.

7. The scroll display device according to claim 1, characterized in that: The sliding reel rotates around its own axis during the movement between the first position and the second position, and the first direction is perpendicular to the axis of the sliding reel.

8. The scroll display device according to claim 7, characterized in that: The scrolling display device also includes a main frame and a frame. The first end of the flexible display screen is connected to the main frame. The frame can be configured to be away from or close to the main frame. The scrolling shaft is connected to the frame in a manner that it can rotate around its own axis.

9. The scroll display device according to claim 1, characterized in that: The guide rail includes a slide groove or a protrusion, and at least one of the two opposite ends of the sliding reel along the axial direction is provided with a convex portion or a concave portion that is concavely and convexly engaged with the guide rail.

10. The scroll display device according to claim 8, characterized in that: The scrolling display device further comprises a shell, the main frame and the motion track control element are fixedly arranged in the shell, and the frame is slidably arranged in the shell.

11. The scroll display device according to claim 1, characterized in that: The sliding scroll includes a main body and a sliding fitting portion provided at at least one of two opposite ends of the main body along the axial direction. The flexible display screen is wound around the main body, and the sliding fitting portion is slidably connected to the guide rail.

12. The scroll display device according to claim 11, characterized in that: There are two sliding fitting parts, which are arranged at two opposite ends of the main body along the axial direction. There are two motion track control members, and each sliding fitting part is slidably connected to the guide rail of a corresponding motion track control member.

13. The scroll display device according to claim 11, characterized in that: The main body and the sliding fitting part are both cylindrical structures, and the diameter of the sliding fitting part is smaller than the diameter of the main body.

14. The scroll display device according to claim 1, characterized in that: The sliding display device further includes a pulling component, which is connected to the second end of the flexible display screen to provide a pulling force to tighten the flexible display screen.

15. The scroll display device according to claim 14, characterized in that: The pulling assembly includes a motor and a transmission component connected to the motor, and the transmission component is connected to the second end of the flexible display screen.

16. The scroll display device according to claim 14, characterized in that: The pulling assembly includes at least one spring connected to the second end of the flexible display screen.

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