A folding display device

Abstract

The application discloses a folding display device, which comprises a flexible display screen body and a flexible ring body installed on the back of the flexible display screen body, the flexible ring body is deformed to drive the flexible display screen body to fold or unfold, and the area of the flexible display screen body when unfolded is larger than the area of the flexible display screen body when folded. The flexible ring body can be twisted and deformed into any shape, thereby driving the flexible display screen body to unfold and fold, increasing display richness and interest, further improving the folding area ratio, bringing more application scenarios to the folding display device, and improving user experience.

Description

Technical Field

[0001] This invention relates to the field of display panels, and in particular to a foldable display device. Background Technology

[0002] In recent years, flexible organic light-emitting diode (OLED) display technology has been widely used, and foldable screen phones based on OLED characteristics are becoming increasingly common. Existing foldable screen devices require complex mechanical structures to assist in folding the screen, resulting in complex manufacturing and high costs. To improve the folding area ratio, multi-axis folding devices are needed, which increases the thickness of the product and reduces the user experience.

[0003] In view of this, it is necessary to develop a new type of foldable display device. Summary of the Invention

[0004] The present invention provides a folding display device to solve the problems of complex manufacturing and high cost caused by using mechanical structures to complete screen folding in the prior art, as well as the problem of increasing product thickness by using multi-axis folding devices to improve the folding area ratio.

[0005] To address the aforementioned technical problems, the present invention provides a foldable display device, comprising: a flexible display body having a display surface and a back surface opposite to the display surface; and a flexible ring body mounted on the back surface of the flexible display body; wherein, the deformation of the flexible ring body causes the flexible display body to fold or unfold; the area of ​​the flexible display body when unfolded is greater than the area of ​​the flexible display body when folded.

[0006] Furthermore, the flexible display body has a display area and a non-display area surrounding the display area; the edge portion of the flexible display body surrounds the flexible ring, and the flexible ring is located in the non-display area.

[0007] Furthermore, the foldable display device also includes an envelope layer that wraps around the flexible ring and is connected to the edge of the display surface and the edge of the back surface of the flexible display body.

[0008] Furthermore, the foldable display device further includes: a ring-shaped support frame, which wraps around the flexible ring and is connected to the back surface of the flexible display body; and

[0009] A screen support is disposed on the back side of the flexible display screen and connected to the ring support.

[0010] Furthermore, the ring bracket and the screen bracket are fixedly connected by buckles or tape.

[0011] Furthermore, the material of the flexible ring includes one or more of carbon steel and shape memory alloys.

[0012] Furthermore, when the flexible ring is made of shape memory alloy, the flexible ring deforms under temperature control. The flexible ring has a shape memory temperature. When the temperature of the flexible ring is higher than the shape memory temperature, the flexible ring deforms, thereby causing the flexible display screen to fold. When the temperature of the flexible ring is lower than the shape memory temperature, the flexible ring deforms, thereby causing the flexible display screen to unfold.

[0013] Furthermore, the folding display device also includes a power supply device, the flexible ring being electrically connected to the power supply device, and the power supply device providing current to the flexible ring to raise the temperature of the flexible ring to the memory deformation temperature.

[0014] Furthermore, the folding display device also includes a support layer disposed on the back side of the flexible display body and located between the flexible display body and the flexible ring; the support layer has a plurality of hollow structures extending through its thickness direction.

[0015] Furthermore, the folding display device also includes a storage box, and the flexible display body is rotatably connected to the storage box via a pivot. When the flexible display body is in a folded state, the flexible display body is rotated into the storage box via the pivot.

[0016] Furthermore, the foldable display device also includes: a flexible circuit board and a driver chip disposed within the storage box; the flexible circuit board and the driver chip are electrically connected to the flexible display body.

[0017] The technical advantages of this invention are as follows: A flexible ring is provided on the back of the flexible display body. The flexible ring can be twisted and deformed into any shape, thereby driving the flexible display body to unfold and fold, increasing the richness and interest of the display, further improving the folding area ratio, bringing more application scenarios to the folding display device, and improving the user experience. Attached Figure Description

[0018] The technical solution and other beneficial effects of the present invention will become apparent from the following detailed description of specific embodiments of the invention, in conjunction with the accompanying drawings.

[0019] Figure 1 This is a front view of the flexible display screen body in the folding display device provided in Embodiment 1 of the present invention when it is unfolded.

[0020] Figure 2This is a schematic diagram of the flexible display screen body in the folding display device provided in Embodiment 1 of the present invention when folded.

[0021] Figure 3 This is an exploded view of the foldable display device provided in Embodiment 1 of the present invention;

[0022] Figure 4 This is a schematic diagram showing the connection between the flexible display body and the flexible ring body of the folding display device provided in Embodiment 1 of the present invention;

[0023] Figure 5 This is a rear view diagram of the flexible display screen body in the folding display device provided in Embodiment 1 of the present invention when it is unfolded.

[0024] Figure 6 This is a schematic diagram of the flexible ring structure provided in Embodiment 1 of the present invention;

[0025] Figure 7 This is a schematic diagram of the flexible ring body when it is unfolded according to Embodiment 1 of the present invention;

[0026] Figure 8 This is a schematic diagram of the flexible ring body folding according to Embodiment 1 of the present invention;

[0027] Figure 9 This is a schematic diagram of the structure of the flexible display screen body provided in Embodiment 1 of the present invention;

[0028] Figure 10 This is a schematic diagram of the flexible display screen body provided in Embodiment 1 of the present invention when it is folded and transferred into the storage box;

[0029] Figure 11 This is a schematic diagram of the flexible display screen body provided in Embodiment 1 of the present invention when it is folded, transferred into the storage box, and covered with a dust cover;

[0030] Figure 12 This is a front view of the flexible display screen body in the folding display device provided in Embodiment 2 of the present invention when it is unfolded.

[0031] Figure 13 This is a schematic diagram of the flexible display screen body in the folding display device provided in Embodiment 2 of the present invention when folded;

[0032] Figure 14 This is a cross-sectional view of the flexible ring in the width direction AA provided in Embodiment 2 of the present invention;

[0033] Figure 15 A cross-section of the foldable display device provided in Embodiment 3 of the present invention. Figure 1 ;

[0034] Figure 16A cross-section of the foldable display device provided in Embodiment 3 of the present invention. Figure 2 ;

[0035] Figure 17 This is a cross-sectional view of the folding display device provided in Embodiment 4 of the present invention.

[0036] Figure label:

[0037] Flexible display body -10; Display area -101;

[0038] Non-display area -102; Support layer -20;

[0039] Flexible ring-30; Rotating shaft-40;

[0040] Storage box - 50; Dust cover - 60;

[0041] Flexible circuit board-11; Driver chip-12;

[0042] Spiral heating wire-31; Hollowed-out structure-21;

[0043] Envelope layer - 70; First adhesive layer - 71;

[0044] Second adhesive layer 72; Flexible protective layer -80;

[0045] Ring-shaped bracket - 91; Screen bracket - 92;

[0046] Elastic tape-93. Detailed Implementation

[0047] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. In the description of the present invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," and "counterclockwise," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing the present invention and simplifying the description. They do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present invention.

[0048] Example 1

[0049] like Figures 1-3 As shown, this embodiment provides a foldable display device. The foldable display device includes a flexible display body 10, a support layer 20, a flexible ring 30, a power supply device, a switch, a temperature control component, a storage box 50, and a dust cover 60.

[0050] The flexible display screen body 10 has a display surface and a back surface opposite to the display surface.

[0051] like Figure 1 As shown, the flexible display screen body 10, when in its unfolded state, has a shape that includes one or more of the following: circular, rectangular, and polygonal. The shape of the flexible display screen body 10 in its unfolded state is the same as the shape of the flexible ring body 30. In this embodiment, the flexible display screen body 10 is circular when in its unfolded state.

[0052] like Figure 2 As shown, the shape of the flexible display screen 10 in its folded state includes one or more of the following: circle, rectangle, and polygon. The shape of the flexible display screen 10 in its folded state is the same as the shape of the flexible ring 30. In this embodiment, the flexible display screen 10 is circular in its folded state. The area of ​​the flexible display screen 10 when unfolded is larger than the area when folded. This increases the richness and interest of the display, improves the folding area ratio, brings more application scenarios to the foldable display device, and enhances the user experience.

[0053] The flexible display body 10 is made of a light-emitting woven fabric or a stretchable elastic light-emitting material. In some embodiments, the flexible display body 10 can also provide touch functionality. In some embodiments, the user of the foldable display device can operate the image displayed on the flexible display body 10 by touch. In some embodiments, the type of display device used for image display in the flexible display body 10 may include, but is not limited to: organic light-emitting diodes, liquid crystal displays (LCDs), microlight-emitting diodes (MicroLEDs), and sub-millimeter light-emitting diodes (Mini LEDs).

[0054] like Figure 9 As shown, the flexible display body 10 has a display area 101 and a non-display area 102 surrounding the display area 101. The folding display device also includes a flexible circuit board 11 and a driving chip 12 disposed within the storage box 50; the flexible circuit board 11 and the driving chip 12 are electrically connected to the flexible display body 10.

[0055] The flexible ring 30 is mounted on the back side of the flexible display screen 10. The deformation of the flexible ring 30 causes the flexible display screen 10 to fold or unfold; the unfolded area of ​​the flexible display screen 10 is larger than its folded area. The flexible ring 30 can be twisted and deformed into any shape, thereby causing the flexible display screen 10 to unfold and fold, increasing the richness and interest of the display, improving the folded area ratio, bringing more application scenarios to foldable display devices, and enhancing the user experience.

[0056] The flexible ring 30 is made of one or more materials, including carbon steel and shape memory alloys. In this embodiment, the flexible ring 30 is made of shape memory alloy. Shape memory alloys (SMA) are martensitic phase transformation alloys with highly regular atomic arrangement and a volume change of less than 0.5%. These alloys deform under external force and, when the force is removed, can recover their original shape under certain temperature conditions. Shape memory alloys have a recovery function of over a million cycles and are non-magnetic, wear-resistant, corrosion-resistant, and non-toxic. The deformation recovery capability of shape memory alloys is due to the thermoelastic martensitic phase transformation that occurs within the material during deformation. Shape memory alloys contain two phases: a high-temperature austenitic phase and a low-temperature martensitic phase. Depending on different thermodynamic loading conditions, shape memory alloys exhibit two different properties.

[0057] Shape memory alloys deform at low temperatures and recover their original shape upon heating; this shape memory phenomenon, which only exists during heating, is called the one-way shape memory effect. Some alloys recover the shape of their high-temperature phase upon heating and then recover the shape of their low-temperature phase upon cooling; this is called the two-way shape memory effect. Recovering the shape of the high-temperature phase upon heating and then transforming into the same shape but opposite orientation of the low-temperature phase upon cooling is called the full-way shape memory effect.

[0058] The shape memory effect of shape memory alloys originates from the thermoelastic martensitic phase transformation. Once formed, this martensite continues to grow as the temperature decreases, and decreases as the temperature increases, disappearing in the exact opposite process. The difference between two free energies acts as the driving force for the phase transformation. The temperature T0 at which the two free energies are equal is called the equilibrium temperature. Martensitic phase transformation only occurs when the temperature is below the equilibrium temperature T0; conversely, reverse phase transformation only occurs when the temperature is above the equilibrium temperature T0. In shape memory alloys, martensitic phase transformation can be induced not only by temperature but also by stress. This stress-induced martensitic phase transformation is called stress-induced martensitic phase transformation, and the transformation temperature has a linear relationship with stress.

[0059] like Figure 4As shown, in this embodiment, the non-display area 102 of the flexible display screen body 10 surrounds the flexible ring body 30 and is bent to the back side of the flexible display screen body 10. This achieves a fixed connection between the flexible display screen body 10 and the flexible ring body 30. Deformation of the flexible ring body 30 causes the flexible display screen body 10 to fold or unfold. The exterior of the flexible ring body 30 is coated with an insulating material to prevent damage to the screen and the user.

[0060] like Figure 7 As shown, the shape of the flexible display screen 10 in its unfolded state is the same as that of the flexible ring 30. In this embodiment, the flexible display screen 10 is circular in its unfolded state. Therefore, in this embodiment, the flexible ring 30 is circular.

[0061] like Figure 8 As shown, in this embodiment, the flexible ring 30 can be folded into a three-turn spiral shape, which drives the flexible display screen 10 to fold into three layers, similar to the folding principle of a commercially available folding fan. In other embodiments, the flexible ring 30 can be deformed into a two-turn or more-turn spiral shape, driving the flexible display screen to fold a corresponding number of times.

[0062] like Figure 1 , Figure 2 As shown, in terms of folding area, when the flexible ring 30 transforms into a three-turn spiral shape, thereby causing the flexible display screen to fold into a three-turn spiral shape, the circumference of the small circle after folding is one-third of the circumference of the flexible ring 30 in the unfolded state. The flexible display screen body 10 has a diameter of 240mm when unfolded, but the cross-sectional size after folding is only a circle with a diameter of less than 80mm. The cross-sectional area of ​​the flexible display screen body 10 after folding is only one-ninth of the cross-sectional area of ​​the flexible display screen body 10 when unfolded, which can reduce the area by more than 9 times. This makes it convenient to store and carry, further improves the folding area ratio, brings more application scenarios to the display device, and enhances the user experience.

[0063] In this embodiment, the flexible ring 30 deforms due to temperature changes. The flexible ring 30 has a memory deformation temperature. When the temperature of the flexible ring 30 is higher than the memory deformation temperature, the flexible ring 30 deforms and folds, thereby causing the flexible display screen 10 to fold; when the temperature of the flexible ring 30 is lower than the memory deformation temperature, the flexible ring 30 deforms and unfolds, thereby causing the flexible display screen 10 to unfold.

[0064] The flexible ring 30 is electrically connected to the power supply device, which provides current to the flexible ring 30 and can heat the flexible ring 30 to reach the memory deformation temperature.

[0065] like Figure 6As shown, in this embodiment, a spiral heating wire 31 is provided on the flexible ring 30. The power supply device is electrically connected to the spiral heating wire 31 to supply power to the spiral heating wire 31, facilitating faster local heating of the flexible ring 30. Specifically, the heating wire 31 is positioned at a certain distance from the driving chip 12 and the flexible circuit board 11. This prevents the temperature of the flexible ring 30 from rising due to the temperature increase of the flexible display screen 10 during operation. Furthermore, a heat-insulating material can be wrapped around the flexible ring 30 to prevent the temperature of the flexible ring 30 from rising due to the temperature increase of the flexible display screen 10 during operation.

[0066] The power supply device is located inside the storage box 50. The power supply device is electrically connected to a switch, which controls the power supply device to supply or de-energize. When the switch controls the power supply device to supply power, the flexible ring 30 heats up. When the temperature rises above the memory deformation temperature, the flexible ring 30 deforms, causing the flexible display screen 10 to fold. When the switch controls the power supply device to de-energize, the flexible ring 30 cools down. When the temperature drops below the memory deformation temperature, the flexible ring 30 deforms, causing the flexible display screen 10 to unfold.

[0067] The temperature control component is electrically connected to the switching component and the flexible ring 30. By monitoring the temperature of the flexible ring 30, it controls the switching component, thereby controlling the power supply device to supply or cut off power. The temperature control component enables the flexible display screen 10 to automatically fold and unfold.

[0068] In other embodiments, the flexible ring 30 can also be made of carbon steel, and the flexible ring 30 can also deform under external force. The flexible ring 30 is subjected to external force by manual application or mechanical control. When the flexible ring 30 is subjected to external force, it deforms into a spiral shape, causing the flexible display screen 10 to fold. When the flexible ring 30 is subjected to external force, it can also return to a flat circular shape, causing the flexible display screen 10 to unfold.

[0069] like Figure 3 As shown, the support layer 20 is disposed on the back of the flexible display body 10, and the support layer 20 is located between the flexible display body 10 and the flexible ring 30. The support layer 20 guides the flexible display body 10 to twist and fold around a fixed trajectory through the flexible ring 30.

[0070] The material of the support layer 20 is one or more of stainless steel, titanium alloy, and shape memory alloy, and its thickness ranges from 20um to 100um.

[0071] like Figure 3 and Figure 5As shown, the support layer 20 has multiple hollow structures 21, which extend through the thickness direction of the support layer 20, which is perpendicular to the light-emitting surface of the flexible display body 10. The support layer 20 is made of rigid material. Since the support layer 20 also needs to be folded when the flexible display body 10 is folded, the multiple hollow structures 21 of the support layer 20 can ensure that the support layer 20 can also be folded.

[0072] In this embodiment, the thickness of the support layer 20 is 0.04 mm, which facilitates bending and folding of the support layer 20. The support layer 20 has three circular perforated structures 21. Specifically, when the foldable display device is folded, the perforated structures 21 of the support layer 20 overlap with the small circles of the folded flexible ring 30, thereby enabling the support layer 20 to better guide the flexible ring 30 to change into a spiral shape.

[0073] like Figure 2 and Figure 10 As shown, the flexible display screen 10 is rotatably connected to the storage box 50 via a pivot 40. When the flexible display screen 10 is in a folded state, it is rotated into the storage box 50 via the pivot 40. This prevents damage to the flexible display screen 10 due to collisions with the outside world when it is not in use, thus effectively protecting the flexible display screen 10.

[0074] like Figure 11 As shown, the dust cover 60 is adapted to the storage box 50, and the dust cover 60 can rotate around the storage box 50. When the flexible display screen 10 rotates into the storage box 50, the dust cover 60 can cover the storage box 50, effectively protecting the flexible display screen 10, while also making it convenient to carry around.

[0075] In summary, the folding display device of this embodiment has a flexible ring 30 on the back of the flexible display body 10. The flexible ring 30 can be twisted and deformed into any shape, thereby driving the flexible display body 10 to unfold and fold, increasing the richness and fun of the display, further improving the folding area ratio, bringing more application scenarios to the folding display device, and improving the user experience.

[0076] Example 2

[0077] like Figure 12 , Figure 13 and Figure 14As shown, the structure of the folding display device in this embodiment is substantially the same as the corresponding structure in Embodiment 1. The same structure can be referred to the corresponding description in Embodiment 1 and will not be elaborated here. The main difference between the two is that in this embodiment, when the flexible display screen body 10 is in the unfolded state, its shape is rectangular, and the shape of the flexible ring body 30 is rectangular; when the flexible display screen body 10 is in the folded state, its shape is rectangular, and the shape of the flexible ring body 30 is rectangular.

[0078] Among them, when the two ends in the length direction of the rectangular flexible ring body 30 are subjected to opposite torsional forces, the square ring is twisted into 3 tightly stacked circles, realizing the folding of the display device and the device, similar to the folding principle of a commercially available folding round fan. Among them, the total perimeter of the 3 circles after folding is equal to the perimeter of the rectangular flexible ring body 30 in the unfolded state, and the perimeter of the small circle ring is 1 / 3 of the original unfolded perimeter. The area of the folding display device decreases after folding.

[0079] As Figure 14 shown, the cross-section of the rectangular flexible ring body 30 in the width direction A-A is rectangular, where the larger dimension w is the width of the rectangular flexible ring body 30, and the smaller dimension t is the thickness of the rectangular flexible ring body 30. Set w>t to ensure that the strength in the thickness direction is less than the strength in the width direction, and it folds into 3 small circle rings after being subjected to torsional forces; the width dimension and thickness dimension are determined by the square ring size and the magnitude of the torsional force.

[0080] Among them, the rectangular flexible ring body 30 can be bent into a ring shape, which has a certain outward tension on the flexible display screen body 10, ensuring that in the unfolded state, the folds and creases of the folding display device are reduced.

[0081] The radius R of the rounded corners around the rectangular flexible ring body 30 affects the radius R0 of the small circle ring after folding. When R>=R0, due to the inward radial force (radius reduction) received by the rounded corners around during folding, it becomes a smooth small circle ring after folding. When R<R0, due to the inability of the rounded corners around to receive the inward radial force (R<R0) during folding, a certain small rounded corner still remains at the R corners around after folding, so the shape after folding is a non-smooth small circle ring with small rounded corners.

[0082] Embodiment 3

[0083] As Figure 15 And Figure 16As shown, the structure of the folding display device in this embodiment is largely the same as the corresponding structure in Embodiment 1. The identical structures can be referred to the corresponding description in Embodiment 1, and will not be repeated here. The main difference is that a flexible protective layer 80 is also provided on the side of the flexible display body 10 away from the support layer 20; that is, the flexible protective layer 80 is disposed on the display surface of the flexible display body 10. The folding display device also includes an envelope layer 70. The envelope layer 70 is made of one or more of PDMS, mesh fabric, and carbon fiber mesh. PDMS (polydimethylsiloxane) elastomer film material is a hydrophobic organosilicon material.

[0084] The envelope layer 70 wraps around the flexible ring 30 and connects to the edge of the display surface and the edge of the back surface of the flexible display body 10. Specifically, the envelope layer 70 connects to the edge of the display surface of the flexible display body 10 via a first adhesive layer 71, i.e., the first adhesive layer 71 connects to the flexible protective layer 80; the envelope layer 70 connects to the edge of the back surface of the flexible display body 10 via a second adhesive layer 72, i.e., the second adhesive layer 72 connects to the support layer 20. Both the first adhesive layer 71 and the second adhesive layer 72 are made of OCA adhesive. In this embodiment, the flexible display body 10 and the flexible ring 30 are fixedly connected through the envelope layer 70, the first adhesive layer 71, and the second adhesive layer 72. The flexible ring 30 is provided on the back surface of the flexible display body 10. The flexible ring 30 can be twisted and deformed into any shape, thereby enabling the flexible display body 10 to unfold and fold, increasing the richness and interest of the display, further improving the folding area ratio, bringing more application scenarios to the folding display device, and improving the user experience.

[0085] Example 4

[0086] like Figure 17 As shown, the structure of the folding display device in this embodiment is largely the same as the corresponding structure in Embodiment 1. The identical structures can be found in the corresponding description in Embodiment 1, and will not be repeated here. The main difference is that the folding display device uses a ring support 91 and a screen support 92 to connect the flexible display body 10 and the flexible ring 30.

[0087] The ring support 91 encloses the flexible ring 30 and is connected to the back side of the flexible display screen 10.

[0088] The screen support 92 is connected to the back side of the flexible display screen 10 and is fixedly connected to the ring support 91. The ring support 91 and the screen support 92 are fixedly connected by buckles or tape.

[0089] In this embodiment, the ring bracket 91 wraps around the flexible ring 30 and is bonded to the back of the flexible display screen 10 with adhesive; the screen bracket 92 is bonded to the back of the flexible display screen 10 with adhesive, and the screen bracket 92 is fixedly connected to the ring bracket 91 by clips (not shown). Connecting the ring bracket 91 and the screen bracket 92 with clips allows for quick assembly and disassembly of the flexible display screen 10 and the flexible ring 30. This facilitates the replacement of the flexible display screen 10 and controls the relative position between the flexible display screen 10 and the flexible ring 30, preventing the image on the flexible display screen 10 from tilting due to installation or folding. Furthermore, gaps exist between the clips to allow them to be bent into various shapes during product folding and storage.

[0090] like Figure 17 As shown, the ring bracket 91 and the screen bracket 92 are also provided with an elastic tape 93 on the side away from the flexible display screen 10. The elastic tape 93 connects the ring bracket 91 and the screen bracket 92, which can prevent the buckle from coming loose during the folding process.

[0091] In this embodiment, the flexible display screen 10 and the flexible ring 30 are fixedly connected by the ring bracket 91 and the screen bracket 92. The flexible ring 30 is provided on the back of the flexible display screen 10. The flexible ring 30 can be twisted and deformed into any shape, thereby driving the flexible display screen 10 to unfold and fold, increasing the richness and interest of the display, further improving the folding area ratio, bringing more application scenarios to the folding display device, and improving the user experience.

[0092] The foregoing has provided a detailed description of a folding display device provided by the embodiments of the present invention. Specific examples have been used to illustrate the principles and implementation methods of the present invention. The description of the above embodiments is only for the purpose of helping to understand the technical solutions and core ideas of the present invention. Those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. These modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A foldable display device, characterized in that, include: A flexible display screen body having a display surface and a back surface opposite to the display surface; A flexible ring is disposed on the back side of the flexible display body. The flexible ring includes an extended state and a folded state. The flexible ring switches between the extended state and the folded state in a torsional bending manner. When the flexible ring is in the extended state, the flexible display body is in an unfolded state. When the flexible ring is in the folded state, the flexible display body is in a folded state. as well as A support layer is disposed on the back side of the flexible display body and located between the flexible display body and the flexible ring. The support layer has multiple hollow structures that extend through its thickness direction. When the foldable display device is folded, the hollow structures of the support layer overlap with the small circles of the folded flexible ring.

2. The folding display device as claimed in claim 1, characterized in that, The flexible display screen body has a display area and a non-display area surrounding the display area; The edge portion of the flexible display body surrounds the flexible ring, and the flexible ring is located in the non-display area.

3. The folding display device as claimed in claim 1, characterized in that, Also includes: An envelope layer, which surrounds the flexible ring, is disposed around the edge of the flexible display body, and is connected to the edge of the flexible display body.

4. The folding display device as claimed in claim 1, characterized in that, Also includes: A ring-shaped support frame, which wraps around the flexible ring and is connected to the back side of the flexible display screen body; as well as A screen support is disposed on the back side of the flexible display screen and connected to the ring support.

5. The folding display device as claimed in claim 4, characterized in that, The connection between the ring bracket and the screen bracket includes snap fastening or adhesive fastening.

6. The folding display device as claimed in claim 1, characterized in that, The flexible ring is made of one or more materials, including carbon steel and shape memory alloys.

7. The folding display device as claimed in claim 6, characterized in that, When the flexible ring is made of shape memory alloy, the flexible ring deforms under temperature control. The flexible ring has a shape memory temperature. When the temperature of the flexible ring is higher than the shape memory temperature, the flexible ring is folded and the flexible display screen is folded. When the temperature of the flexible ring is lower than the shape memory temperature, the flexible ring is unfolded and the flexible display screen is unfolded.

8. The folding display device as claimed in claim 7, characterized in that, Also includes: A power supply device is provided, wherein the flexible ring is electrically connected to the power supply device, and the power supply device provides current to the flexible ring to raise the temperature of the flexible ring to the memory deformation temperature.

9. The folding display device as claimed in claim 1, characterized in that, Also includes: The flexible display screen is rotatably connected to the storage box via a pivot. When the flexible display screen is in a folded state, it is rotated into the storage box via the pivot.

10. The folding display device as claimed in claim 9, characterized in that, Also includes: A flexible circuit board and a driver chip are disposed within the storage box; the flexible circuit board and the driver chip are electrically connected to the flexible display screen body.

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