Display device

Abstract

A display device is provided. The display device includes: a flexible display panel; a fixed casing; a first movable case and a second movable case, the first movable case and the second movable case being configured to move relative to the fixed case in a first direction when the display device is converted from one form to the other form; and a third movable chassis and a fourth movable chassis configured to move relative to the fixed chassis in a first direction when the display device is transitioned from one form to another form, and / or configured to move relative to the fixed chassis in a second direction when the display device is transitioned from one form to another form, and / or configured to move relative to the fixed chassis in a third direction when the display device is transitioned from one form to another form. The first movable case moves relative to the first movable case and the second movable case in the first direction.

Description

Technical Field

[0001] This invention relates to display technology, and more particularly to a display device. Background Technology

[0002] The field of display technology encompasses a variety of methods and devices for presenting visual information to users. This includes the development and improvement of flexible display panels, which offer advantages such as improved portability and dynamic sizing capabilities. Flexible display panels can be integrated into devices that require the ability to switch between a compact and unfolded state, thus providing versatility for various use cases. Mechanisms that control the unfolding and retraction of these display panels include tensioning systems and guide mechanisms for maintaining display quality and ensuring smooth operation. Summary of the Invention

[0003] On one hand, this disclosure provides a display device, including: a flexible display panel; a fixed housing; a first movable housing and a second movable housing, the first movable housing and the second movable housing being configured to move relative to the fixed housing along a first direction when the display device changes from one form to another; and a third movable housing and a fourth movable housing, the third movable housing and the fourth movable housing being configured to move relative to the fixed housing along the first direction when the display device changes from one form to another, and / or being configured to move relative to the first movable housing and the second movable housing along the first direction when the display device changes from one form to another.

[0004] Optionally, the third movable housing is configured to move relative to the first movable housing along the first direction when the display device changes from one form to another; and the fourth movable housing is configured to move relative to the second movable housing along the first direction when the display device changes from one form to another.

[0005] Optionally, the first movable housing and the second movable housing are configured to move relative to the fixed housing; the third movable housing and the fourth movable housing are configured to move relative to the fixed housing; and the third movable housing and the fourth movable housing are configured to move relative to the first movable housing and the second movable housing.

[0006] Optionally, the third movable housing is configured to move relative to the first movable housing; and the fourth movable housing is configured to move relative to the second movable housing.

[0007] Optionally, the display device further includes: a first tensioning strip, one end of which is attached to the first movable housing and the other end of which is attached to the second movable housing; and a second tensioning strip, one end of which is attached to the third movable housing and the other end of which is attached to the fourth movable housing.

[0008] Optionally, the display device further includes a first guide wheel and a second guide wheel attached to the fixed housing; wherein one end of the first tensioning strip is attached to the first movable housing, then wound around the first guide wheel, then wound around the second guide wheel, and the other end is attached to the second movable housing.

[0009] Optionally, the display device further includes one or more auxiliary guide wheels; wherein one end of the first tension bar is attached to the first movable housing, then wound around the first guide wheel, then wound around the one or more auxiliary guide wheels, then wound around the second guide wheel, and the other end is attached to the second movable housing.

[0010] Optionally, the display device further includes a third guide wheel attached to the first movable housing and a fourth guide wheel attached to the second movable housing; wherein one end of the second tension bar is attached to the third movable housing, then wound around the third guide wheel, then wound around the fourth guide wheel, and the other end is attached to the fourth movable housing.

[0011] Optionally, the display device further includes one or more auxiliary guide wheels; wherein one end of the second tension bar is attached to the third movable housing, then wound around the third guide wheel, then wound around the one or more auxiliary guide wheels, then wound around the fourth guide wheel, and the other end is attached to the fourth movable housing.

[0012] Optionally, one end of the flexible display panel is attached to the third movable housing, and the other end is attached to the fourth movable housing.

[0013] Optionally, the display device includes: a first closed-loop tensioning system comprising the flexible display panel, the third movable housing, the fourth movable housing, and the second tensioning bar; and a second closed-loop tensioning system comprising the first closed-loop tensioning system, the first movable housing, the second movable housing, and the first tensioning bar; wherein the first closed-loop tensioning system and the second closed-loop tensioning system are configured to operate in parallel, thereby forming an overall closed-loop tensioning system.

[0014] Optionally, the display device is configured to switch between a first form and a second form; the flexible display panel is folded up to a first position in the first form; and the flexible display panel is unfolded to a second position in the second form.

[0015] Optionally, in the first embodiment, the flexible display panel is configured to display a first image in a first portion of the flexible display panel, the first portion being opened for viewing and having a first length along the first direction; in the second embodiment, the flexible display panel is configured to display a second image in a second portion of the flexible display panel, the second portion being opened for viewing and having a second length along the first direction; and the second length is greater than the first length.

[0016] Optionally, the second length is at least three times greater than or equal to the first length.

[0017] Optionally, the display device further includes a drive motor configured to drive the display device from the first mode to the second mode.

[0018] Optionally, the display device further includes a fixture for receiving the drive motor.

[0019] Optionally, the flexible display panel includes a bent portion; wherein the display device further includes a side constraint track configured to constrain the shape of the bent portion.

[0020] Optionally, the display device further includes: a guide rail attached to the fixed housing; a first sliding rail attached to the second movable housing; and a second sliding rail attached to the fourth movable housing; wherein the first sliding rail and the second sliding rail are configured to ensure that the second movable housing and the fourth movable housing can move horizontally.

[0021] Optionally, the third movable housing is located on the side of the first movable housing away from the fixed housing; and the fourth movable housing is located on the side of the second movable housing away from the fixed housing.

[0022] Optionally, the flexible display panel is located on the side of the third and fourth movable housings away from the fixed housing. Attached Figure Description

[0023] The following figures are merely illustrative examples based on various disclosed embodiments and are not intended to limit the scope of the invention.

[0024] Figure 1 This is a schematic diagram showing the structure of the relevant display device.

[0025] Figure 2A This is a schematic diagram illustrating the structure of a display device according to some embodiments of the present disclosure.

[0026] Figure 2B This is a schematic diagram illustrating the structure of a display device according to some embodiments of the present disclosure.

[0027] Figure 3 This is a front view of a display device in a second configuration according to some embodiments of the present disclosure.

[0028] Figure 4 This is a rear view of a display device in a second configuration according to some embodiments of the present disclosure.

[0029] Figure 5 This is a front view of a display device in a second configuration according to some embodiments of the present disclosure.

[0030] Figure 6 This is a rear view of a display device in a second configuration according to some embodiments of the present disclosure.

[0031] Figure 7 The connection between a second movable housing and a fourth movable housing is shown in some embodiments according to this disclosure.

[0032] Figure 8 This is an enlarged view of a portion of the bent portion of a display device according to some embodiments of the present disclosure. Detailed Implementation

[0033] This disclosure will now be described in more detail with reference to the following embodiments. It should be noted that the following description of some embodiments presented herein is for illustrative and descriptive purposes only. It is not exhaustive or limited to the precise forms disclosed.

[0034] The sliding mechanism utilizes the flexibility of flexible display panels to design a linkage mechanism, allowing the flexible display panel to unfold from the bottom to a vertical (or other angle) position, achieving the storage and concealment of the flexible display panel. The ratio of the retracted size to the unfolded size of the sliding display is called the unfolding ratio. The larger the unfolding ratio, the larger the concealment space of the flexible display panel, and the better the effect. The maximum unfolding ratio of existing sliding mechanisms used for flexible display panels is 1:2. These mechanisms often encounter problems such as uneven tension distribution and insufficient support during unfolding, leading to decreased display quality and structural instability.

[0035] Figure 1 This is a schematic diagram showing the structure of the relevant display device. (Refer to...) Figure 1The display device is configured to switch between a first configuration and a second configuration. In the first configuration, the flexible display panel is retracted to a first position, and in the second configuration, the flexible display panel is extended to a second position. The display device includes a movable component MA, a fixed component FA, and a flexible display panel DP partially mounted on the movable component and partially mounted on the fixed component FA. The display device also includes a tension bar TS connected to the flexible display panel DP, forming a closed-loop tensioning system. The tension bar TS is attached (e.g., wound) to a fixed shaft FS in the fixed component FA and attached (e.g., wound) to a movable shaft MS in the movable component MA. The display device also includes a drive motor DM, which is configured to drive the movable component MA, for example, horizontally. When the drive motor DM drives the display device from the first configuration to the second configuration, the movable shaft MS approaches but cannot cross the fixed shaft FS. If the movable shaft MS crosses the fixed shaft FS, the tension bar TS separates from the movable shaft MS, loses its pulley function, and the tension is lost.

[0036] The display device according to this disclosure overcomes the limitations of existing mechanisms by introducing a sliding mechanism with a high unfolding-to-twist ratio (greater than 1:2, such as 1:3 or 1:4). The display device according to this disclosure uses a sliding mechanism to achieve a high unfolding-to-twist ratio, thereby ensuring efficient utilization and storage of the display device. This mechanism utilizes a multi-tiered tensioning system and a multi-comb support structure to ensure uniform tension distribution and continuous support during the unfolding and retraction of the display device.

[0037] The display device according to this disclosure includes a plurality of tensioning units arranged in series. Each tensioning unit applies a uniform tension force to the flexible display panel during unfolding and retraction. This uniform tension force distribution minimizes crease formation, ensuring a smooth and high-quality display surface. The display device according to this disclosure also includes a support structure. The support structure is characterized by a plurality of comb-like elements that move synchronously with the flexible display panel. These elements provide continuous and stable support to the flexible display panel, thereby preventing any deflection or sagging. The support structure ensures that the flexible display panel remains flat and free of pressure play during full unfolding.

[0038] The inventors of this disclosure have discovered that the sliding mechanism according to this disclosure achieves a retractable ratio greater than 1:2, such as 1:3 or 1:4. This allows the flexible display panel to be housed with a more compact shape factor when retracted and to unfold to a larger size when in use, thereby maximizing the usable display area. The mechanism includes features that allow the display module to stop at any intermediate position between a fully retracted state and a fully unfolded state. This feature provides the flexibility to adjust the display size according to the content being displayed, enhancing user experience and adaptability.

[0039] Therefore, this disclosure provides a display device that substantially eliminates one or more problems caused by the limitations and disadvantages of the prior art. In one aspect, this disclosure provides a display device. In some embodiments, the display device includes: a flexible display panel; a fixed housing; a first movable housing and a second movable housing, the first and second movable housings being configured to move relative to the fixed housing along a first direction when the display device transitions from one form to another; and a third movable housing and a fourth movable housing, the third and fourth movable housings being configured to move relative to the fixed housing along the first direction when the display device transitions from one form to another, and / or being configured to move relative to the first and second movable housings along the first direction when the display device transitions from one form to another.

[0040] Figure 2A This is a schematic diagram illustrating the structure of a display device according to some embodiments of the present disclosure. (Refer to...) Figure 2A In some embodiments, the display device includes: a fixed housing FH; a first movable housing MH1 and a second movable housing MH2, the first movable housing MH1 and the second movable housing MH2 being configured to move relative to the fixed housing FH along a first direction DR1 when the display device transitions from one form to another; a third movable housing MH3 and a fourth movable housing MH4, the third movable housing MH3 and the fourth movable housing MH4 being located on the side of the first movable housing MH1 and the second movable housing MH2 away from the fixed housing FH, and being configured to move relative to the fixed housing FH along the first direction DR1 when the display device transitions from one form to another, and / or being configured to move relative to the first movable housing MH1 and the second movable housing MH2 along the first direction DR1 when the display device transitions from one form to another; and a flexible display panel DP, which is located on the side of the third movable housing MH3 and the fourth movable housing MH4 away from the fixed housing FH.

[0041] In some embodiments, the third movable housing MH3 is configured to move relative to the first movable housing MH1 along the first direction DR1 when the display device transitions from one form to another. In some embodiments, the fourth movable housing MH4 is configured to move relative to the second movable housing MH2 along the first direction DR1 when the display device transitions from one form to another.

[0042] In some embodiments, the first movable housing MH1 and the second movable housing MH2 are configured to move relative to the fixed housing FH via a guide rail, such as a linear guide rail.

[0043] In some embodiments, the third movable housing MH3 and the fourth movable housing MH4 are configured to move relative to the fixed housing FH via guide rails, such as linear guide rails.

[0044] In some embodiments, the third movable housing MH3 and the fourth movable housing MH4 are configured to move relative to the first movable housing MH1 and the second movable housing MH2 via guide rails, such as linear guide rails.

[0045] In some embodiments, the third movable housing MH3 is configured to move relative to the first movable housing MH1 via a guide rail, such as a linear guide rail.

[0046] In some embodiments, the fourth movable housing MH4 is configured to move relative to the second movable housing MH2 via a guide rail, such as a linear guide rail.

[0047] In some embodiments, the display device further includes a first guide wheel GW1 and a second guide wheel GW2 attached to a fixed housing FH. In some embodiments, the first guide wheel GW1 and the second guide wheel GW2 are configured to rotate about a respective center attached to the fixed housing FH, for example, using a bearing mechanism. In some embodiments, the first guide wheel GW1 and the second guide wheel GW2 are configured to rotate synchronously.

[0048] In some embodiments, the display device further includes a third guide wheel GW3 attached to a first movable housing MH1 and a fourth guide wheel GW4 attached to a second movable housing MH2. In some embodiments, the third guide wheel GW3 is configured to rotate about a center attached to the first movable housing MH1. In some embodiments, the fourth guide wheel GW4 is configured to rotate about a center attached to the second movable housing MH2. In some embodiments, the third guide wheel GW3 and the fourth guide wheel GW4 are configured to rotate synchronously.

[0049] In some embodiments, the display device further includes a first tensioning strip TS1 wound around the first guide wheel GW1 and the second guide wheel GW2. In some embodiments, one end of the first tensioning strip TS1 is attached to the first movable housing MH1, and the other end is attached to the second movable housing MH2. Optionally, one end of the first tensioning strip TS1 is fixedly attached (e.g., by adhesive or screws) to the first movable housing MH1, and the other end is fixedly attached (e.g., by adhesive or screws) to the second movable housing MH2. In one example, one end of the first tensioning strip TS1 is attached to the first movable housing MH1, then wound around the first guide wheel GW1, then wound around the second guide wheel GW2, and the other end is attached to the second movable housing MH2. In some embodiments, the first tensioning strip TS1 is pre-tensioned.

[0050] In some embodiments, the display device further includes a second tensioning strip TS2 wound around the third guide wheel GW3 and the fourth guide wheel GW4. In some embodiments, one end of the second tensioning strip TS2 is attached to the third movable housing MH3, and the other end is attached to the fourth movable housing MH4. Optionally, one end of the second tensioning strip TS2 is fixedly attached (e.g., by adhesive or screws) to the third movable housing MH3, and the other end is fixedly attached (e.g., by adhesive or screws) to the fourth movable housing MH4. In one example, one end of the second tensioning strip TS2 is attached to the third movable housing MH3, then wound around the third guide wheel GW3, then wound around the fourth guide wheel GW4, and the other end is attached to the fourth movable housing MH4. In some embodiments, the second tensioning strip TS2 is pre-tensioned.

[0051] In some embodiments, one end of the flexible display panel DP is attached to a third movable housing MH3, and the other end is attached to a fourth movable housing MH4. Optionally, one end of the flexible display panel DP is fixedly attached (e.g., by adhesive or screws) to the third movable housing MH3, and the other end is fixedly attached (e.g., by adhesive or screws) to the fourth movable housing MH4.

[0052] In some embodiments, the display device includes a first closed-loop tensioning system, which includes a flexible display panel DP, a third movable housing MH3, a fourth movable housing MH4, and a second tension bar TS2. In some embodiments, the display device further includes a second closed-loop tensioning system, which includes the first closed-loop tensioning system, a first movable housing MH1, a second movable housing MH2, and a first tension bar TS1. The first and second closed-loop tensioning systems are configured to operate in parallel, forming an overall closed-loop tensioning system.

[0053] By driving the fourth movable housing MH4 to move along the first direction DR1, the second closed-loop tensioning system can move along the first direction DR1. When the first movable housing MH1 and the second movable housing MH2 reach the corresponding limit points on the fixed housing FH, the fourth movable housing MH4 continues to move along the first direction DR1, thereby driving the first closed-loop tensioning system to move along the first direction DR1, until the third movable housing MH3 and the fourth movable housing MH4 reach the corresponding limit points corresponding to the first movable housing MH1 and the second movable housing MH2. Optionally, the limit points can be defined by mechanical limits.

[0054] The inventors of this disclosure have discovered that a stop-and-go function can be achieved in the display device of this disclosure by having two sets of parallel tensioning systems. A high expansion-to-contraction ratio can be achieved by having two sets of movable housings combined with the two sets of parallel tensioning systems.

[0055] Figure 2AThree configurations of the display device are shown: a first configuration in which the flexible display panel DP is retracted to a first position; a second configuration in which the flexible display panel DP is extended to a second position; and a third configuration in which the flexible display panel DP is extended to a third position. Optionally, the third position is between the first and second positions. Optionally, the flexible display panel DP is completely retracted in the first configuration, completely extended in the second configuration, and partially extended in the third configuration.

[0056] In a first embodiment, the flexible display panel DP is configured to display a first image in a first portion of the flexible display panel DP, the first portion being open for viewing and having a first length L1 along a first direction DR1. In a second embodiment, the flexible display panel DP is configured to display a second image in a second portion of the flexible display panel DP, the second portion being open for viewing and having a second length L2 along the first direction DR1. In a third embodiment, the flexible display panel DP is configured to display a third image in a third portion of the flexible display panel DP, the third portion being open for viewing and having a third length L3 along the first direction DR1. Optionally, L2>L3>L1. In a particular example, L2 = 3*L1. In another example, the scaling ratio of the display device is L2:L1 = 3:1. The inventors of this disclosure have discovered that even larger scaling ratios can be achieved based on embodiments of this disclosure. In another example, the scaling ratio of the display device is greater than 3:1, for example, greater than 3.5:1, greater than 4:0:1, greater than 4.5:1, or greater than 5.0:1.

[0057] Figure 2B This is a schematic diagram illustrating the structure of a display device according to some embodiments of the present disclosure. (Refer to...) Figure 2B The shaded area represents the hollow portion of the display device, which serves as a movement space for multiple mechanisms.

[0058] Figure 3 This is a front view of a display device in a second configuration according to some embodiments of the present disclosure. Figure 3 The display device in its second form is depicted. (See reference) Figure 3 One end of the flexible display panel DP is attached to the third movable housing MH3, and the other end is attached to the fourth movable housing MH4. In some embodiments, the flexible display panel DP includes a bent portion BP and a side constraint track SCT configured to constrain the shape of the bent portion BP. The fourth movable housing MH4 is located on the side of the second movable housing MH2 away from the fixed housing FH.

[0059] Figure 4 This is a rear view of a display device in a second configuration according to some embodiments of the present disclosure. Figure 4 The display device in its second form is depicted. (See reference) Figure 4 In some embodiments, the display device includes a third movable housing MH3 attached to one end of the flexible display panel and a fourth movable housing MH4 attached to the other end of the flexible display panel. In some embodiments, the display device further includes a first movable housing MH1 and a second movable housing MH2. The third movable housing MH3 is located on the side of the first movable housing MH1 away from the fixed housing FH. The fourth movable housing MH4 is located on the side of the second movable housing MH2 away from the fixed housing FH.

[0060] In some embodiments, the display device further includes a fixed housing FH. A first movable housing MH1 and a second movable housing MH2 are configured to move relative to the fixed housing FH along a first direction when the display device transitions from one form to another. A third movable housing MH3 and a fourth movable housing MH4 are configured to move relative to the fixed housing FH along the first direction when the display device transitions from one form to another, and / or are configured to move relative to the first movable housing MH1 and the second movable housing MH2 along the first direction when the display device transitions from one form to another.

[0061] In some embodiments, the display device further includes a first tensioning strip TS1. In some embodiments, one end of the first tensioning strip TS1 is attached to a first movable housing MH1, then wound around a first guide wheel GW1, then wound around one or more first auxiliary guide wheels AGW1 (or one or more second auxiliary guide wheels AGW2), subsequently wound around a second guide wheel GW2, and the other end is attached to a second movable housing MH2. In some embodiments, the first tensioning strip TS1 is pre-tensioned. In one example, the first tension bar TS1 is pre-tensioned, wherein the tension force is in the range of 5N to 80N, for example, 5N to 10N, 10N to 15N, 15N to 20N, 20N to 25N, 25N to 30N, 30N to 35N, 35N to 40N, 40N to 45N, 45N to 50N, 50N to 55N, 55N to 60N, 60N to 65N, 65N to 70N, 70N to 75N, or 75N to 80N.

[0062] In some embodiments, the display device further includes a second tension bar TS2. In some embodiments, one end of the second tension bar TS2 is attached to a third movable housing MH3, then wound around a third guide wheel GW3, then wound around one or more second auxiliary guide wheels AGW2 (or one or more first auxiliary guide wheels AGW1), then wound around a fourth guide wheel GW4, and the other end is attached to a fourth movable housing MH4. In some embodiments, the second tension bar TS2 is pre-tensioned. In one example, the second tension bar TS2 is pre-tensioned, wherein the tension force is in the range of 5N to 80N, such as 5N to 10N, 10N to 15N, 15N to 20N, 20N to 25N, 25N to 30N, 30N to 35N, 35N to 40N, 40N to 45N, 45N to 50N, 50N to 55N, 55N to 60N, 60N to 65N, 65N to 70N, 70N to 75N, or 75N to 80N.

[0063] In some embodiments, the display device further includes a drive motor DM configured to drive a fourth movable housing MH4. Optionally, the drive motor DM includes a two-layer closed tensioning system.

[0064] Figure 5 This is a front view of a display device in a second configuration according to some embodiments of the present disclosure. Figure 5 The display device in its first form is depicted. (See reference) Figure 5 One end of the flexible display panel DP is attached to the third movable housing MH3, and the other end is attached to the fourth movable housing MH4. In some embodiments, the flexible display panel DP includes a bent portion BP and a side constraint track SCT configured to constrain the shape of the bent portion BP. The fourth movable housing MH4 is located on the side of the second movable housing MH2 away from the fixed housing FH.

[0065] Figure 6 This is a rear view of a display device in a second configuration according to some embodiments of the present disclosure. Figure 6 The display device in its first form is depicted. (See reference) Figure 6 In some embodiments, the display device includes a drive motor DM and a mounting housing FH.

[0066] Figure 7 The connection between the second movable housing MH2 and the fourth movable housing MH4 is shown in some embodiments according to this disclosure. Figure 7 The fixed housing FH is not shown in the diagram. (Refer to...) Figure 7 In some embodiments, the display device includes a second movable housing MH2 and a fourth movable housing MH4.

[0067] In some embodiments, the display device further includes an anchor AC for receiving a drive motor. Optionally, the anchor AC is located on a fourth movable housing MH4. Optionally, a second movable housing MH2 has a hole cut at this location to avoid interference.

[0068] In some embodiments, the display device further includes a fourth guide wheel GW4 attached to a second movable housing MH2, and a second guide wheel GW2 attached to a fixed housing FH.

[0069] In some embodiments, the display device further includes a guide rail GR attached to the fixed housing FH. In some embodiments, the display device further includes a first slider SD1 attached to the second movable housing MH2 and a second slider SD2 attached to the fourth movable housing MH4. The first slider SD1 and the second slider SD2 are configured to ensure that the second movable housing MH2 and the fourth movable housing MH4 can move horizontally.

[0070] Figure 8 This is an enlarged view of a portion of the bent portion of a display device according to some embodiments of the present disclosure. (Refer to...) Figure 8 In some embodiments, the bent portion of the display device includes one or more first auxiliary guide wheels AGW1. In some embodiments, one end of a first tension bar TS1 is attached to a first movable housing MH1, then wound around a first guide wheel GW1, then wound around one or more first auxiliary guide wheels AGW1 attached to the bent portion BP, subsequently wound around a second guide wheel GW2, and the other end is attached to a second movable housing MH2. The one or more first auxiliary guide wheels AGW1 are configured to reduce sliding friction, thereby ensuring smooth movement of the first tension bar TS1.

[0071] For illustrative and descriptive purposes, the foregoing description of embodiments of the invention has been provided. It is not exhaustive, nor is it intended to limit the invention to the precise forms or exemplary embodiments disclosed. Therefore, the foregoing description should be considered illustrative rather than restrictive. Clearly, many modifications and variations will be apparent to those skilled in the art. The embodiments were chosen and described to explain the principles of the invention and its best mode of practical application, thereby enabling those skilled in the art to understand the various embodiments of the invention and the various modifications suitable for the particular use or implementation contemplated. The scope of the invention is intended to be defined by the appended claims and their equivalents, wherein, unless otherwise stated, all terms are to be interpreted in their broadest reasonable sense. Therefore, the terms “the invention,” “the present invention,” etc., do not necessarily limit the scope of the claims to specific examples, and references to exemplary embodiments of the invention do not imply limitation of the invention, nor should such limitation be inferred. The invention is defined only by the spirit and scope of the appended claims. Furthermore, these claims may involve the use of “first,” “second,” etc., followed by nouns or elements. These terms should be understood as nomenclature and should not be construed as limiting the number of elements modified by these nomenclatures unless a specific number has been given. Any advantages and benefits described may not apply to all embodiments of the invention. It should be understood that changes to the described embodiments can be made by those skilled in the art without departing from the scope of the invention as defined by the appended claims. Furthermore, the elements and components in this disclosure are not intended for public distribution, whether or not they are expressly recited in the appended claims.

Claims

1. A display device, comprising: Flexible display panel; Fixed housing; A first movable housing and a second movable housing are configured to move relative to the fixed housing along a first direction when the display device changes from one form to another. as well as The third and fourth movable housings are configured to move relative to the fixed housing along the first direction when the display device changes from one form to another, and / or are configured to move relative to the first and second movable housings along the first direction when the display device changes from one form to another.

2. The display device according to claim 1, wherein The third movable housing is configured to move relative to the first movable housing along the first direction when the display device changes from one form to another. as well as The fourth movable housing is configured to move relative to the second movable housing along the first direction when the display device changes from one form to another.

3. The display device according to claim 1, wherein The first movable housing and the second movable housing are configured to move relative to the fixed housing; The third movable housing and the fourth movable housing are configured to move relative to the fixed housing; as well as The third movable housing and the fourth movable housing are configured to move relative to the first movable housing and the second movable housing.

4. The display device according to claim 3, wherein The third movable housing is configured to move relative to the first movable housing; as well as The fourth movable housing is configured to move relative to the second movable housing.

5. The display device according to any one of claims 1 to 4, further comprising: The first tension strip has one end attached to the first movable housing and the other end attached to the second movable housing; as well as The second tensioning strip has one end attached to the third movable housing and the other end attached to the fourth movable housing.

6. The display device according to claim 5, further comprising a first guide wheel and a second guide wheel attached to the fixed housing; in, One end of the first tension strip is attached to the first movable housing, then wound around the first guide wheel, then wound around the second guide wheel, and the other end is attached to the second movable housing.

7. The display device according to claim 6 further includes one or more auxiliary guide wheels; in, One end of the first tension strip is attached to the first movable housing, then wound around the first guide wheel, then around the one or more auxiliary guide wheels, then around the second guide wheel, and the other end is attached to the second movable housing.

8. The display device according to claim 5 further includes a third guide wheel attached to the first movable housing and a fourth guide wheel attached to the second movable housing; in, One end of the second tension strip is attached to the third movable housing, then wound around the third guide wheel, then wound around the fourth guide wheel, and the other end is attached to the fourth movable housing.

9. The display device according to claim 8, further comprising one or more auxiliary guide wheels; in, One end of the second tension strip is attached to the third movable housing, then wound around the third guide wheel, then around the one or more auxiliary guide wheels, then around the fourth guide wheel, and the other end is attached to the fourth movable housing.

10. The display device according to any one of claims 1 to 9, wherein, One end of the flexible display panel is attached to the third movable housing, and the other end is attached to the fourth movable housing.

11. The display device according to claim 1, comprising: The first closed-loop tensioning system includes the flexible display panel, the third movable housing, the fourth movable housing, and the second tensioning bar; as well as The second closed-loop tensioning system includes the first closed-loop tensioning system, the first movable housing, the second movable housing, and the first tensioning bar; The first closed-loop tensioning system and the second closed-loop tensioning system are configured to operate in parallel, thereby forming an overall closed-loop tensioning system.

12. The display device according to claim 1, wherein, The display device is configured to switch between a first mode and a second mode; The flexible display panel is retracted to a first position in the first configuration; and The flexible display panel unfolds to a second position in the second configuration.

13. The display device according to claim 12, wherein, In the first configuration, the flexible display panel is configured to display a first image in a first portion of the flexible display panel, the first portion being opened for viewing and having a first length along the first direction; In the second configuration, the flexible display panel is configured to display a second image in a second portion of the flexible display panel, the second portion being opened for viewing and having a second length along the first direction; as well as The second length is greater than the first length.

14. The display device according to claim 13, wherein, The second length is at least three times greater than or equal to the first length.

15. The display device according to any one of claims 12 to 14, further comprising a drive motor configured to drive the display device from the first mode to the second mode.

16. The display device according to claim 15, further comprising a fixing member for receiving the drive motor.

17. The display device according to any one of claims 1 to 16, wherein, The flexible display panel includes a bent portion; The display device further includes a side constraint track configured to constrain the shape of the bent portion.

18. The display device according to any one of claims 1 to 17, further comprising: Guide rails are attached to the fixed housing; A first sliding track is attached to the second movable housing; as well as The second sliding track is attached to the fourth movable housing; The first sliding rail and the second sliding rail are configured to ensure that the second movable housing and the fourth movable housing can move horizontally.

19. The display device according to any one of claims 1 to 18, wherein, The third movable housing is located on the side of the first movable housing away from the fixed housing; and The fourth movable housing is located on the side of the second movable housing away from the fixed housing.

20. The display device according to any one of claims 1 to 19, wherein, The flexible display panel is located on the side of the third and fourth movable housings away from the fixed housing.

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