Display device

Abstract

A display device (1000). The display device (1000) comprises a reel (200), a flexible display panel (100), and a printed circuit board (300); the reel (200) has an accommodating cavity (201) and an opening (202); the accommodating cavity (201) is communicated with the opening (202); the reel (200) comprises a reel housing (21) and a support member (22); the support member (22) is connected to the reel housing (21); at least part of the support member (22) is opposite to the inner side of the reel housing (21); a starting section of the flexible display panel (100) is located between the inner side of the reel housing (21) and the support member (22); the flexible display panel (100) extends out of the accommodating cavity (201) through the opening (202) and is wound around the exterior of the reel housing (21); the starting section of the flexible display panel (100) is connected to the support member (22); and the printed circuit board (300) is located in the accommodating cavity (201) and is configured to be connected to the flexible display panel (100).

Description

Display device

[0001] This application claims priority to Chinese Patent Application No. 202410445780.4, filed on April 12, 2024, the entire contents of which are incorporated herein by reference. TECHNICAL FIELD

[0002] The present disclosure relates to the technical field of display, and in particular, to a display device. BACKGROUND

[0003] With the expansion of market demand for flexible displays, research and development of various flexible display devices have been increasingly valued, such as the development of a rollable display device in use, including a flexible display panel and a reel, the flexible display panel being wound or unwound on the reel.

[0004] The display device further includes a printed circuit board, which is usually disposed outside the reel. Since the printed circuit board is not rollable, the printed circuit board cannot be wound on the reel, and the display device has a large area that cannot be wound, affecting the storage effect of the display device.

[0005] SUMMARY

[0006] A display device is provided. The display device includes a reel, a flexible display panel, and a printed circuit board. The reel has a receiving cavity and an opening, and the receiving cavity and the opening are in communication. The reel includes a shaft shell and a support. The support is connected with the shaft shell, and at least a portion of the support is opposite to an inner side of the shaft shell. A starting section of the flexible display panel is located between the inner side of the shaft shell and the support, the flexible display panel extends out of the receiving cavity from an inner diameter of the receiving cavity, and is wound on an outer side of the shaft shell. The starting section of the flexible display panel is connected with the support. The printed circuit board is located in the receiving cavity, and the printed circuit board is configured to be connected with the flexible display panel.

[0007] In some embodiments, one side of the starting section of the flexible display panel is connected with the support, and the other side is connected with the inner side of the shaft shell.

[0008] In some embodiments, the support and the shaft shell press the starting section of the flexible display panel.

[0009] In some embodiments, the inner side of the shaft shell is provided with a protective layer, and the protective layer is at least oppositely arranged with the starting section of the flexible display panel.

[0010] In some embodiments, a side surface of the support close to the flexible display panel includes a connection area and a transition area. The connection area is connected with the flexible display panel, and the connection area is planar or curved. The transition area is located at the opening, and the transition area is curved.

[0011] In some embodiments, the outer side of the shaft shell is curved, and the radius of the curve of the transition region is smaller than the radius of the curve of the outer side of the shaft shell.

[0012] In some embodiments, the support is provided with a protrusion near a side surface of the flexible display panel, and one end of the flexible display panel is located between the protrusion and the opening.

[0013] In some embodiments, the starting section of the flexible display panel, the support, and the printed circuit board are sequentially stacked.

[0014] In some embodiments, the printed circuit board is configured to be connected with the support.

[0015] In some embodiments, the display device further comprises a reinforcing plate. The reinforcing plate is arranged on one side of the printed circuit board.

[0016] In some embodiments, the display device further comprises a first connector. The first connector is arranged in the accommodating cavity, and the printed circuit board is connected with the flexible display panel through the first connector.

[0017] In some embodiments, the first connector is provided with a chip, and the support is provided with a groove capable of accommodating the chip.

[0018] In some embodiments, in a cross section perpendicular to the length direction of the shaft, the maximum size of the printed circuit board is equal to the maximum size of the accommodating cavity.

[0019] In some embodiments, the shaft shell is detachably connected with the support. And / or, the shaft shell comprises a first shaft shell and a second shaft shell, the first shaft shell is detachably connected with the second shaft shell, and the support is detachably connected with the second shaft shell.

[0020] In some embodiments, the display device further comprises a housing, a system mainboard, and a second connector. The shaft is located in the housing, and the system mainboard and the second connector are arranged in the housing. The system mainboard is connected with the printed circuit board through the second connector.

[0021] In some embodiments, the length of the second connector is greater than the distance between the printed circuit board and the system mainboard.

[0022] In some embodiments, the display device further comprises a driving mechanism. The driving mechanism is connected with the shaft, and drives the shaft to rotate. BRIEF DESCRIPTION OF DRAWINGS

[0023] In order to more clearly illustrate the technical solutions in the present disclosure, the drawings needed to be used in some embodiments of the present disclosure will be briefly introduced as follows. Obviously, the drawings in the following description only represent some embodiments of the present disclosure, and other drawings can also be obtained by those skilled in the art according to these drawings. In addition, the drawings in the following description can be regarded as schematic diagrams, and are not limited to the actual size, actual process, actual timing of signals, etc. of the products involved in the embodiments of the present disclosure.

[0024] FIG. 1 is a block diagram of a display device according to some embodiments of the present disclosure;

[0025] FIG. 2 is a pixel driving circuit diagram according to some embodiments of the present disclosure;

[0026] FIG. 3 is another pixel driving circuit diagram of a sub-pixel according to some embodiments of the present disclosure;

[0027] FIG. 4 is a structural diagram of a display device according to some embodiments of the present disclosure;

[0028] FIG. 5 is an expanded diagram of a display device according to some embodiments of the present disclosure;

[0029] FIG. 6 is a rolled-up diagram of a display device according to some embodiments of the present disclosure;

[0030] FIG. 7 is a sectional view taken along the section line B1-B2 in FIG. 4;

[0031] FIG. 8 is a structural diagram of a display device according to the related art;

[0032] FIG. 9 is a structural diagram of a reel according to some embodiments of the present disclosure;

[0033] FIG. 10 is a perspective view of a display device according to some embodiments of the present disclosure;

[0034] FIG. 11 is a structural diagram of a shaft housing according to some embodiments of the present disclosure;

[0035] FIG. 12 is a structural diagram of another reel according to some embodiments of the present disclosure;

[0036] FIG. 13 is a structural diagram of another reel according to some embodiments of the present disclosure;

[0037] FIG. 14 is a partial exploded view of a display device according to some embodiments of the present disclosure;

[0038] FIG. 15 is a structural diagram of a reel according to some embodiments of the present disclosure;

[0039] FIG. 16 is another structural diagram of a reel according to some embodiments of the present disclosure;

[0040] FIG. 17 is a partial structural diagram of a display device according to some embodiments of the present disclosure;

[0041] FIG. 18 is another partial structural diagram of a display device according to some embodiments of the present disclosure. DETAILED DESCRIPTION

[0042] The technical solutions in the embodiments of the present disclosure will be clearly and completely described below with reference to the drawings. It should be apparent that the described embodiments are only a part of the embodiments of the present disclosure, but not all the embodiments. Based on the embodiments of the present disclosure provided, all other embodiments obtained by a person of ordinary skill in the art belong to the scope of the present disclosure.

[0043] Unless otherwise required by context, the term "comprises" or "comprising" in the specification and claims is to be construed as meaning "including, but not limited to". In the description of the specification, the terms "one embodiment", "some embodiments", "exemplary embodiment", "example", or "some examples" are intended to mean that the particular feature, structure, material, or characteristic following the term is included in at least one embodiment or example of the present disclosure. The illustrative representations of the above terms do not necessarily indicate a reference to the same embodiment or example. In addition, the particular features, structures, materials, or characteristics described can be included in any suitable way in any one or more embodiments or examples.

[0044] Hereinafter, the terms "first" and "second" are used only for the purpose of description, and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined with "first" and "second" can explicitly or implicitly include one or more of the features. In the description of the embodiments of the present disclosure, unless otherwise stated, the meaning of "a plurality of" is two or more.

[0045] In describing some embodiments, "coupled" and "connected" and their derivatives can be used. The term "connected" should be interpreted broadly, for example, "connected" can be fixedly connected, or detachably connected, or integrated; can be directly connected, or indirectly connected through an intermediate medium. The term "coupled" indicates, for example, that two or more components have direct physical contact or electrical contact. The term "coupled" or "communicatively coupled" can also mean that two or more components do not have direct contact with each other, but still cooperate or interact with each other. The embodiments disclosed herein are not necessarily limited to the content herein.

[0046] “A, B, and C at least one of” has the same meaning as “at least one of A, B, or C,” including the following combinations of A, B, and C: A only, B only, C only, a combination of A and B, a combination of A and C, a combination of B and C, and a combination of A, B, and C.

[0047] “A and / or B” includes the following three combinations: A only, B only, and a combination of A and B.

[0048] The use of “adapted to” or “configured to” herein means an open and inclusive language that does not exclude devices that are adapted to or configured to perform additional tasks or steps.

[0049] Additionally, the use of “based on” means open and inclusive, as a process, step, calculation, or other action that is “based on” one or more recited conditions or values can in practice be based on additional conditions or values beyond those recited.

[0050] As used herein, “about,” “approximately,” or “around” includes the recited value and the average value within an acceptable range of deviation from the particular value, as determined by one of ordinary skill in the art considering the measurement in question and the error in measuring the particular quantity (i.e., the limitations of the measurement system).

[0051] As used herein, “parallel,” “perpendicular,” and “equal” include the recited condition and conditions that approximate the recited condition, the approximation being within an acceptable range of deviation, as determined by one of ordinary skill in the art considering the measurement in question and the error in measuring the particular quantity (i.e., the limitations of the measurement system). For example, “parallel” includes absolute parallel and near parallel, where the acceptable range of deviation for near parallel can be, for example, within 5°; “perpendicular” includes absolute perpendicular and near perpendicular, where the acceptable range of deviation for near perpendicular can also be, for example, within 5°. “Equal” includes absolute equality and near equality, where the acceptable range of deviation for near equality can be, for example, a difference between the two that is less than or equal to 5% of either.

[0052] It will be understood that when a layer or element is referred to as being “on” another layer or substrate, it can be directly on the other layer or substrate, or intervening layers can also be present.

[0053] This document describes exemplary embodiments with reference to cross-sectional views and / or plan views, which are idealized exemplary drawings. In the drawings, the thickness of layers and the area of ​​regions are enlarged for clarity. Therefore, variations in shape relative to the drawings are contemplated due to, for example, manufacturing techniques and / or tolerances. Thus, exemplary embodiments should not be construed as being limited to the shapes of the regions shown herein, but rather include shape deviations due to, for example, manufacturing processes. For example, etched areas shown as rectangular would typically have curved features. Therefore, the regions shown in the drawings are schematic in nature, and their shapes are not intended to show the actual shapes of the areas of the device, nor are they intended to limit the scope of the exemplary embodiments.

[0054] The embodiments of this disclosure provide a retractable display device, such as a pull-out display device, which allows the display screen size to be changed during use.

[0055] A display device is an electronic device that has the function of displaying images (including still images or moving images, where moving images can be video). For example, a display device can be any of the following: monitor, television set, billboard, digital photo frame, laser printer with display function, telephone, mobile phone, personal digital assistant (PDA), digital camera, portable camcorder, viewfinder, navigator, large wall display, home appliance, information query equipment (such as business query equipment for e-government, banks, hospitals, power companies, etc.), monitor, electronic display screen, and vehicle display, but is not limited to these.

[0056] Figure 1 is a block diagram of a display device provided in some embodiments of the present disclosure.

[0057] Referring to Figure 1, the display device 1000 includes a flexible display panel 100, an image processor 110, a timing controller 120, a data driver 140, and a scan driver 130.

[0058] The image processor 110 outputs a data enable signal DE and a data signal DATA provided from an external source. In addition to the data enable signal DE, the image processor 110 may also output a vertical synchronization signal, a horizontal synchronization signal, and a clock signal, etc. (not shown in Figure 1).

[0059] The timing controller 120 receives a data enable signal DE and a data signal DATA from the image processor 110. The timing controller 120 may also receive vertical synchronization signals, horizontal synchronization signals, and clock signals from the image processor 110. Based on the drive signals, the timing controller 120 outputs a gate timing control signal GDC for controlling the operating timing of the scan driver 130 and a data timing control signal DDC for controlling the operating timing of the data driver 140.

[0060] The data driver 140 samples and latches the data signal DATA received from the timing controller 120 in response to a data timing control signal DDC provided from the timing controller 120, and converts the signal into a gamma reference voltage and outputs. The data driver 140 outputs the data signal DATA through data lines DL1 to DLn. The data driver 140 can be formed in the form of an Integrated Circuit (IC).

[0061] The scan driver 130 outputs a scan signal while converting the level of a gate voltage in response to a gate timing control signal GDC provided from the timing controller 120. The scan driver 130 outputs the scan signal through scan lines GL1 to GLn. The scan driver 130 can be formed in the form of an IC or formed on the flexible display panel 100 in the form of a Gate-In-panel (GIP).

[0062] The image processor 110 is coupled with the timing controller 120, which can be coupled with the data driver 140 and the scan driver 130.

[0063] The flexible display panel 100 is used to display a picture. The flexible display panel 100 is electrically connected and attached to the image processor 110, the timing controller 120, the data driver 140, the scan driver 130, etc. (for example, a power supply unit, etc.). The flexible display panel 100 displays an image in response to a data signal DATA and a scan signal provided from the data driver 140 and the scan driver 130, respectively. The specific structure of the flexible display panel 100 is described in detail later.

[0064] Continuing to refer to FIG. 1, the flexible display panel 100 includes sub-pixels SP for displaying images. The sub-pixel SP is the smallest unit for displaying a picture in the flexible display panel 100, and each sub-pixel SP can display a single color, for example, the pixel SP can be a first sub-pixel, a second sub-pixel, or a third sub-pixel, which respectively display red, green, or blue. Each sub-pixel SP includes a light emitting device and a pixel driving circuit for controlling the light emitting device to emit light. That is, one sub-pixel SP corresponds to one pixel driving circuit. The pixel driving circuit can be configured to write a data signal in response to a received scan signal and drive the light emitting device to emit light by the electrical signal. The light emitting device can be any one of an organic light emitting diode (OLED) device, a quantum dot light emitting diode (QLED) device, a light-emitting diode (LED), or a micro light emitting diode (Mini LED or Micro LED). Embodiments of the present disclosure are exemplarily described with the light emitting device as OLED.

[0065] FIG. 2 is a pixel driving circuit diagram provided by some embodiments of the present disclosure.

[0066] Referring to FIG. 2, the pixel driving circuit can include a switching transistor SW, a driving transistor DR, and a capacitor Cst. The switching transistor SW is turned on in response to a scan signal provided through a first scan line GL1 to store a data signal provided through a first data line DL1 as a data voltage in the capacitor Cst. The driving transistor DR operates according to the data voltage stored in the capacitor Cst to cause a driving current to flow between a first power supply line EVDD and a second power supply line EVSS. The light emitting device OLED emits light by the driving current formed by the driving transistor DR.

[0067] In some examples, the pixel driving circuit further includes a compensation circuit CC. The compensation circuit CC is a circuit provided in the pixel driving circuit to compensate for threshold voltage, etc. The compensation circuit CC is composed of one or more transistors. The configuration of the compensation circuit CC varies widely depending on the method of compensation, examples of which will be described below.

[0068] FIG. 3 is yet another pixel driving circuit diagram of a sub-pixel provided by some embodiments of the present disclosure.

[0069] The compensation circuit CC includes a sensing transistor ST and a sensing line VREF. Referring to FIG. 3, the sensing transistor ST is connected between the source line of the driving transistor DR and the anode of the organic light emitting diode (hereinafter, referred to as a sensing node). The sensing transistor ST operates to provide a reset voltage (or a sensing voltage) through the sensing line VREF to the sensing node or to sense the voltage or current at the sensing node.

[0070] The switching transistor SW has a first electrode connected to the first data line DL1 and a second electrode connected to the gate electrode of the driving transistor DR. The driving transistor DR has a first electrode connected to the first power supply line EVDD and a second electrode connected to the anode of the light emitting device OLED. The capacitor Cst has a first electrode connected to the gate electrode of the driving transistor DR and a second electrode connected to the anode of the light emitting device. The light emitting device OLED has an anode connected to the second electrode of the capacitor Cst and a cathode connected to the second power supply line EVSS. The sensing transistor ST has a first electrode connected to the sensing line VREF and a second electrode connected to the anode of the light emitting device OLED, i.e., the sensing node. It is noted that the first electrode is one of the source electrode and the drain electrode of the transistor, and the second electrode is the other of the source electrode and the drain electrode of the transistor.

[0071] According to the compensation algorithm (or the configuration of the compensation circuit), the operation time of the sensing transistor ST can be similar to or the same as or different from the operation time of the switching transistor SW. In an example, the switching transistor SW can have a gate electrode connected to the 1st scan line GL1a, and the sensing transistor ST can have a gate electrode connected to the 1st scan line GL1b. In another example, the 1st scan line GL1a connected to the gate electrode of the switching transistor SW and the 1st scan line GL1b connected to the gate electrode of the sensing transistor ST can be connected such that they are shared.

[0072] The sensing line VREF can be connected to the data driver 140 (not shown in FIG. 3). In this case, the data driver 140 can sense the sensing node of the sub-pixel in real time during a non-display period or an Nth frame period (N is an integer equal to or greater than 1) of an image and perform compensation according to the sensing result. At the same time, the switching transistor SW and the sensing transistor ST can be turned on at the same time. In this case, the sensing operation through the sensing line VREF and the output operation for outputting a data signal are distinguished based on the time division method of the data driver 140.

[0073] The digital data signal, the analog data signal, or the gamma voltage can be compensated according to the sensing result. Furthermore, the compensation circuit that generates a compensation signal (or a compensation voltage) based on the sensing result can be implemented within the data driver 140, implemented within the timing controller 120 (not shown in FIG. 3), or implemented by a separate circuit.

[0074] The pixel driving circuit can include a plurality of transistors and a capacitor. For example, referring to FIG. 3, the pixel driving circuit includes a three-transistor-one-capacitor 3T1C structure of a switching transistor SW, a driving transistor DR, a capacitor Cst, and a sensing transistor ST, where T represents a transistor, a number in front of T represents a number of transistors, C represents a capacitor, and a number in front of C represents a number of capacitors. In addition, in the case of adding a compensation circuit CC, the pixel driving circuit can be a 3T2C, 4T2C, 5T1C, 6T2C, or the like.

[0075] FIG. 4 is a structural diagram of a display device according to some embodiments of the present disclosure.

[0076] For the convenience of the following description, an XYZ coordinate system is established. A first direction X and a second direction Y are both parallel to a plane on which a display surface of the flexible display panel 100 lies, and the two directions intersect each other. For example, the first direction X and the second direction Y are perpendicular to each other. A third direction Z is perpendicular to the plane on which the display surface of the flexible display panel 100 lies.

[0077] Referring to FIG. 4, the display device 1000 includes the flexible display panel 100 and a roller 200.

[0078] The flexible display panel 100 has a display area AA and a non-display area SA, where the display area AA is an area of the flexible display panel 100 for displaying a picture, a plurality of sub-pixels SP (not shown in FIG. 4) are arranged in the display area AA according to a specified rule, and the non-display area SA is an area of the flexible display panel 100 other than the display area AA. The non-display area SA can be located at least one side (for example, one side, and for example, multiple sides) of the display area AA. For example, the non-display area SA can be arranged around the display area AA. In some examples, an edge at which the display area AA and the non-display area SA are separated is a pad, and a pad electrode to which a signal line electrically connected to the display area AA is arranged at the pad.

[0079] In some examples, the scan driver 130 can be formed on the flexible display panel 100 by a Gate In Panel (GIP) technology. That is, the scan driver 130 can be formed on at least one side (for example, referring to the upper side and the lower side of FIG. 4) of the display area AA by the GIP technology.

[0080] The flexible display panel 100 can be bent or curved. In some examples, the flexible display panel 100 can be any one of an Organic Light Emitting Diode (OLED) display panel, a Quantum Dot Light Emitting Diodes (QLED) display panel, and a Mini LED or Micro LED display panel.

[0081] The reel 200 can provide a mechanical structure for winding and unwinding the flexible display panel 100 around its outer periphery. The reel 200 rotates around a rotation axis extending in the length direction (the second direction Y) of the reel 200. The reel 200 is connected to the flexible display panel 100, and the flexible display panel 100 can be wound on the reel 200. The reel 200 rotates to wind or unwind the flexible display panel 100 on the reel, so that the display device 1000 is retracted or expanded to achieve the purpose of changing the screen size of the display device 1000 during use.

[0082] For example, the boundary of the flexible display panel 100 is rectangular, the length direction of the reel 200 is parallel to one side boundary of the flexible display panel 100, and the winding or unwinding direction of the flexible display panel 100 is perpendicular to the length direction of the reel 200, for example, the flexible display panel 100 is wound or unwound along the first direction X. In this way, the area of the display picture on the flexible display panel 100 can change uniformly, and the display effect of the display device 1000 can be improved.

[0083] In another implementation, the length direction of the reel 200 can also be not parallel to the boundary of the flexible display panel 100.

[0084] The winding and unwinding states of the flexible display panel 100 are described in detail below.

[0085] FIG. 5 is an unwinding view of a display device provided by some embodiments of the present disclosure. FIG. 6 is a winding view of a display device provided by some embodiments of the present disclosure.

[0086] The flexible display panel 100 is wound or unwound on the reel 200 with the rotation of the reel 200. Specifically, referring to FIG. 5, when the reel 200 rotates in the r1 direction (for example, the clockwise direction), the reel 200 rotates to unwind the flexible display panel 100 on the reel 200, that is, the side of the flexible display panel 100 not connected to the reel 200 moves away from the reel 200 (in the X1 direction). With the unwinding of the flexible display panel 100, the area of the display picture increases until the flexible display panel 100 is unwound to an approximately planar state. During this process, the screen of the display device 1000 is expanded.

[0087] Referring to FIG. 6, when the reel 200 rotates in the r2 direction (for example, the counterclockwise direction), the reel 200 rotates to wind the flexible display panel 100 on the reel 200, that is, the side of the flexible display panel 100 not connected to the reel 200 moves in the direction (the x2 direction) close to the reel 200 and is wound on the reel 200. As the flexible display panel 100 is wound, the area of the display screen decreases, and in this process, the screen of the display device 1000 shrinks.

[0088] FIG. 7 is a cross-sectional view taken along the section line B1-B2 in FIG. 4.

[0089] To control the image displayed by the flexible display panel 100, the display device 1000 further includes a driving module. Exemplarily, the driving module includes an integrated driving circuit and a control circuit. The control circuit can transmit image data and a timing synchronization signal to the integrated driving circuit, and the integrated driving circuit can generate a data signal and a driving signal for displaying an image based on the image data and the timing synchronization signal and transmit the data signal and the driving signal to the flexible display panel 100.

[0090] The control circuit is located on a printed circuit board (PCB) 300. The integrated driving circuit can be located on the printed circuit board 300, can be formed on the flexible display panel 100 by GIP technology, or can be located between the printed circuit board 300 and the flexible display panel 100. That is, referring to FIG. 7, the display device 1000 further includes the printed circuit board 300 connected to the flexible display panel 100.

[0091] The printed circuit board 300 includes a substrate and a plurality of electrical components. The substrate is not bendable or foldable, and the material of the substrate can be bakelite, glass fiber board, or various plastic boards. The material of the substrate can also be an insulating part composed of glass fiber, polyester fiber, dacron fiber, and resin, and then be pressed into a prepreg using epoxy resin and copper foil. The material of the substrate can also be other suitable materials, which will not be described in detail in the embodiments of the present disclosure. In this way, the printed circuit board 300 is a rigid circuit board and cannot be curled or folded.

[0092] The plurality of electrical components are located on the substrate, and signal lines for transmitting and receiving electrical signals are also provided on the substrate to form a driving circuit. The electrical components can include the image processor 110 and the timing controller 120 (not shown in FIG. 7) described above, and can also include a plurality of electronic elements such as capacitors, resistors, inductors, circulators, isolators, couplers, oscillators, or transistors, but are not limited thereto.

[0093] FIG. 8 is a structural diagram of a display device provided by the related art.

[0094] In the related art, referring to FIG. 8, the printed circuit board 300' is located outside the reel 200'. The printed circuit board 300' can be located at a side of the flexible display panel 100' away from a display surface (hereinafter referred to as a back light surface of the flexible display panel 100'), for example, the printed circuit board 300' is located at an area corresponding to a display region of the flexible display panel 100', for another example, the printed circuit board 300' is located at an area corresponding to a non-display region of the flexible display panel 100', for another example, the printed circuit board 300' is located at an area corresponding to both the display region and the non-display region of the flexible display panel 100'. The printed circuit board 300' can also be located in a plane in which the flexible display panel 100' extends.

[0095] With the rotation of the reel 200', the flexible display panel 100' is wound or unwound on the reel 200'. However, since the printed circuit board 300' is a rigid circuit board and cannot be curled, the printed circuit board 300' cannot be wound on the reel 200'. When the flexible display panel 100' is wound, the area of the flexible display panel 100' corresponding to the printed circuit board 300' cannot be wound on the reel 200' at all times, that is, the flexible display panel 100' cannot be completely wound on the reel 200', and there is a large area that cannot be recycled, which affects the storage effect of the flexible display panel 100'.

[0096] In addition, continuing to refer to FIG. 8, when the printed circuit board 300' is located at the back light surface side of the flexible display panel 100', the side of the flexible display panel 100' away from the reel 200' has a bending region 101 and a binding region 102 connected with the printed circuit board 300'. The bending region 101 is bent so that the binding region 102 is located at the back light surface of the flexible display panel 100', the binding region 102 is connected with the printed circuit board 300', and the bending region 101 increases the size of the flexible display panel 100' in the first direction X, so that the size of the frame of the display device 1000' in the first direction X is increased, which is not conducive to the miniaturization of the display device 1000'. When the printed circuit board 300' is located in the plane in which the flexible display panel 100' extends, since the frame of the display device 1000' needs to cover the printed circuit board 300', the size of the frame of the display device 1000' in the first direction X is increased, which also increases the size of the display device 1000', which is not conducive to the miniaturization of the display device 1000'.

[0097] In order to solve the above problems, continuing to refer to FIG. 7, the printed circuit board 300 is arranged in the reel 200, and the printed circuit board 300 and the flexible display panel 100 are connected with each other in the reel 200.

[0098] FIG. 9 is a structural diagram of a reel according to some embodiments of the present disclosure. FIG. 10 is a perspective view of a display device according to some embodiments of the present disclosure.

[0099] Specifically, referring to FIG. 9 and FIG. 10, the reel 200 has a receiving cavity 201 and an opening 202. The receiving cavity 201 is in communication with the opening 202. A portion of the flexible display panel 100 is located in the receiving cavity 201, and another portion of the flexible display panel 100 extends out of the receiving cavity 201 through the opening 202. The opening 202 serves as a passageway for the portion of the flexible display panel 100 to extend out of the receiving cavity 201. For the convenience of the following description, the portion of the flexible display panel 100 located in the receiving cavity 201 is referred to as a starting section.

[0100] Referring to FIG. 10, the opening 202 is a gap on the outer periphery of the reel 200. The opening 202 can be strip-shaped along the length direction (the second direction Y) of the reel 200. The extension direction of the opening 202 is parallel to the length direction of the reel 200.

[0101] In some examples, the size h1 of the opening 202 along the length direction of the reel 200 is greater than the size h2 of the flexible display panel 100 along the length direction of the reel 200. The flexible display panel 100 can extend out of the opening 202 flatly, avoiding wrinkles of the flexible display panel 100 at the opening 202, and affecting the display effect of the display device.

[0102] In some examples, the width d of the opening 202 is greater than or equal to the thickness of the flexible display panel 100, so as to ensure that the portion of the flexible display panel 100 can extend out of the receiving cavity 201 of the reel 200 through the opening. The width of the opening 202 is the size of the opening 202 along a direction perpendicular to the length direction of the reel 200. The direction perpendicular to the length direction of the reel 200 and the length direction of the reel 200 are both parallel to the plane in which the opening 202 is located.

[0103] Continuing to refer to FIG. 7 and FIG. 9, the reel 200 can include a shaft shell 21 and a support 22. The support 22 is connected to the shaft shell 21, and at least a portion of the support 22 is opposite to the inner side of the shaft shell 21. The support 22 is used to support the starting section of the flexible display panel 100. FIG. 11 is a structural diagram of a shaft shell according to some embodiments of the present disclosure.

[0104] For example, referring to FIG. 11, the inner side of the shaft shell 21 is in a U-shaped structure. Referring to FIG. 9, a gap is left between one end of the shaft shell 21 and the support 22, forming the opening 202. The other end of the shaft shell 21 is connected to the support 22. The shaft shell 21 has a receiving space, and at least a portion (for example, a portion, and for example, all) of the support 22 is located in the receiving space. The inner side of the shaft shell 21 and the surface of the support 22 not connected to the shaft shell 21 form the receiving cavity 201.

[0105] The support 22 covers a portion of the shaft shell 21, which can prevent the printed circuit board 300 (not shown in FIG. 9) from falling out of the accommodating cavity 201 to the outside of the reel 200. For example, continuing to refer to FIG. 9, a portion of the support 22 extends into the accommodating space, and another portion of the support 22 is located outside the accommodating space, and the portion of the support 22 located outside the accommodating space is connected to the outer side of the shaft shell 21, at this time, the outer periphery of the reel 200 is the outer side of the shaft shell 21 and the portion of the support 22. For another example, the support 22 extends into the accommodating space, and the support 22 is connected to the inner side of the shaft shell 21, at this time, the outer periphery of the reel 200 is the outer side of the shaft shell 21.

[0106] FIG. 12 is a structural diagram of another reel provided by some embodiments of the present disclosure. FIG. 13 is a structural diagram of another reel provided by some embodiments of the present disclosure.

[0107] For another example, referring to FIGS. 12 and 13, the inner side of the shaft shell 21 is in an S-shaped structure, and the side of the support 22 opposite to the shaft shell 21 can also be in an S-shaped structure. As shown in FIG. 12, the S-shaped structure can be composed of two groups of semicircular curves with an angle of 180°. As shown in FIG. 13, the S-shaped structure can also be composed of two groups of semicircular curves with an angle of 90°, and the S-shaped structure can also be composed of circular arcs with an angle of 90°-180°. At this time, the inner side of the shaft shell 21 and the inner side of the support 22 form the accommodating cavity 201.

[0108] The connection mode of the support 22 and the shaft shell 21 can be fixed connection or detachable connection. For example, the shaft shell 21 and the support 22 are connected by an adhesive, and the material of the adhesive can include polyacrylate, polyurethane or epoxy resin. It should be noted that in actual application, the material of the adhesive can also be other materials with good adhesive properties, which are not listed here. For another example, the shaft shell 21 and the support 22 are connected by a bolt. For another example, the shaft shell 21 and the support 22 are respectively provided with an overlap position, and a screw connection or an adhesive connection is arranged at the overlap position to assemble and connect the shaft shell 21 and the support 22 into one body.

[0109] It can be understood that the connection mode of the shaft shell 21 and the support 22 can be any other connection mode as long as the two can be connected.

[0110] The outer periphery of the reel 200 can be approximately circular. It can be understood that the cross section of the reel 200 in the embodiments of the present disclosure can be any shape, for example, an elliptical shape, a polygonal shape, etc., as long as the flexible display panel 100 can be rolled up around the outer periphery of the reel 200.

[0111] Continuing to refer to FIG. 7, the starting section of the flexible display panel 100 is located in the accommodating cavity 201, the flexible display panel 100 extends out of the accommodating cavity 201 from the opening 202 in the accommodating cavity 201, and is wound around the outer periphery of the winding shaft 200. The starting section of the flexible display panel 100 is connected with the support 22, and the flexible display panel 100 can be prevented from being separated from the winding shaft 200.

[0112] The printed circuit board 300 is located in the accommodating cavity 201. Exemplarily, the printed circuit board 300 can be movably arranged in the accommodating cavity 201 without being connected with the inner side of the winding shaft 200. Exemplarily, the printed circuit board 300 is connected with the inner side of the winding shaft 200, for example, the printed circuit board 300 is connected with the inner side of the shaft shell 21, for example, the printed circuit board 300 is connected with the surface of the support 22 extending into the accommodating cavity 201, for example, the printed circuit board 300 is located at the inner side of the shaft shell 21 and the surface of the support 22 extending into the accommodating cavity 201 at the same time. The connection mode can be fixed connection or detachable connection, which can be referred to the connection mode described above, and will not be described here again. The printed circuit board 300 is connected with the winding shaft 200, and the printed circuit board 300 can be prevented from falling and colliding with other structures.

[0113] The printed circuit board 300 is configured to be connected with the flexible display panel 100, and exemplarily, the printed circuit board 300 is directly connected with the flexible display panel 100. Exemplarily, the printed circuit board 300 is connected with the flexible display panel 100 through a connecting member. The specific structure of the connecting member will be described in detail below.

[0114] The movement of the printed circuit board 300 in the embodiment of the present disclosure is constrained and limited in the winding shaft 200, and the space utilization of the display device 1000 can be improved. When the flexible display panel 100 is wound, the area on the flexible display panel 100 corresponding to the printed circuit board 300 is located in the winding shaft 200, and the part of the flexible display panel 100 exposed outside the winding shaft 200 can be completely wound on the outer periphery of the winding shaft 200, so that the user cannot see the display area, and the storage effect of the flexible display panel 100 can be improved. Moreover, when the flexible display panel 100 is connected with the printed circuit board 300, the binding area can be located in the accommodating cavity 201 of the winding shaft 200, so that the size of the flexible display panel 100 increased in the first direction X is located in the accommodating cavity 201 of the winding shaft 200, and the actual size of the flexible display panel 100 in the first direction X outside the winding shaft 200 is relatively reduced, so that the narrow frame purpose is achieved, and the miniaturization of the display device 1000 is facilitated.

[0115] In some embodiments, referring to FIG. 7, one side of the starting section of the flexible display panel 100 is connected with the support 22, and the other side is connected with the inner side of the shaft shell 21. That is, the flexible display panel 100 is located in the part of the accommodating cavity 201, and both sides of the part are connected with the reel 200, for example, by bonding. In this way, both sides of the starting section of the flexible display panel 100 can be subjected to tensile stress during winding or unwinding of the flexible display panel 100, reducing the situation that one side of the starting section is subjected to tensile stress and the other side is not subjected to stress, thereby preventing the flexible display panel 100 from being separated between layers.

[0116] In some embodiments, the side of the starting section of the flexible display panel 100 connected with the support 22 can be provided with a sealing agent to connect the starting section with the support 22, and the side of the starting section of the flexible display panel 100 connected with the inner side of the shaft shell 21 can be provided with a sealing agent to connect the starting section with the inner side of the shaft shell 21. The sealing agent can include waterproof and anti-vibration polymer resin. At this time, the part of the accommodating cavity 201 of the reel 200 is filled with the sealing agent and the flexible display panel 100, which can block the penetration of moisture and the transmission of vibration, thereby preventing the flexible display panel 100 and the printed circuit board 300 located in the reel 200 from being damaged.

[0117] In some embodiments, referring to FIG. 7, the support 22 and the shaft shell 21 press the flexible display panel 100 arranged between the support 22 and the shaft shell 21. Specifically, the support 22 and the shaft shell 21 press the starting section of the flexible display panel 100. The distance between the inner side of the shaft shell 21 corresponding to the starting section and the support 22 is equal to the thickness of the flexible display panel 100. The two sides of the flexible display panel are pressed by the support and the shaft shell, and pressure is applied from top to bottom, which can reduce the problem that the adjacent film layers of the flexible display panel are peeled off from each other under the action of cutting stress.

[0118] In some embodiments, the inner side of the shaft shell 21 is provided with a protective layer. Specifically, the protective layer is arranged at least opposite to the starting section of the flexible display panel. For example, the inner side of the shaft shell 21 is provided with a protective layer; for another example, the shaft shell 21 is provided with a protective layer at a position opposite to the starting section of the flexible display panel 100. The material of the protective layer is a soft energy-absorbing material, such as foam, thermoplastic polyurethane (TPU), etc. In this embodiment, the soft energy-absorbing material can absorb external impact, so that the protective layer can protect the flexible display panel 100, and the soft energy-absorbing material can be deformed to avoid the inner side of the shaft shell 21 being uneven to cause the flexible display panel 100 to be pressed.

[0119] In some embodiments, referring to FIG. 7, the support 22 near the side surface of the flexible display panel 100 comprises a connecting area 221 and a transition area 222, the connecting area 221 is connected to the flexible display panel 100, and the transition area 222 is located at the opening 202. The flexible display panel 100 covers the connecting area 221 and the transition area 222 in sequence, and is wound outside the spool 200 through the opening 202. The connecting area 221 is planar or curved. For example, the connecting area 221 is planar, and the starting section of the flexible display panel 100 is parallel to the connecting area 221, and the pressing is more compact. For another example, the connecting area 221 is curved, and the connecting area of the starting section of the flexible display panel 100 and the connecting area 222 is increased, which can improve the connection strength of the starting section and the connecting area 222.

[0120] In some embodiments, referring to FIG. 7, the transition area 222 is curved, and the flexible display panel 100 is attached to the transition area 222, which can reduce the mechanical stress of the flexible display panel 100 on the transition area 222. In this way, the flexible display panel 100 is extended outside the spool 200 through the arc transition of the transition area 222, avoiding the right-angle transition of the flexible display panel 100, thereby affecting the use performance of the flexible display panel 100.

[0121] In some embodiments, referring to FIG. 7, the outer side of the shaft shell 21 is curved, so that the inner surface of the flexible display panel 100 is uniformly stressed. The radius of curvature of the transition area is smaller than that of the outer surface of the shaft shell, that is, the curvature of the transition area is smaller than that of the shaft shell, so that the stress of the flexible display panel 100 in the transition area is minimized.

[0122] In some embodiments, referring to FIG. 7, the support 22 near the side surface of the flexible display panel 100 is provided with a protrusion 223, and one end of the flexible display panel 100 is located between the protrusion 221 and the opening 202. The area of the flexible display panel 100 extending into the accommodating cavity 201 can be reduced to increase the area of the display area outside the spool 200, thereby improving the display effect.

[0123] In some embodiments, referring to FIG. 7, the starting section of the flexible display panel 100, the support 22 and the printed circuit board 300 are arranged in sequence. The starting section of the flexible display panel 100, the support 22 and the printed circuit board 300 form a stacked structure, so that their volumes can be minimized to be compactly accommodated in the accommodating cavity 201, reducing the volume of the spool 200, and facilitating the miniaturization of the display device 1000.

[0124] In some embodiments, the printed circuit board 300 is configured to be connected with the support 22. The printed circuit board 300 can be directly connected with the support 22 or indirectly connected with the support 22 through other structures. Illustratively, the printed circuit board 300 is connected with the surface of the support 22. For example, the printed circuit board 300 can be fixed to the surface of the support 22 via a fixing member which can constrain and limit the movement of the printed circuit board 300. The fixing member can include an adhesive such as double-sided tape.

[0125] In some embodiments, at least a portion of the surface of the support 22 is parallel to the printed circuit board 300, which strengthens the connection strength between the support 22 and the printed circuit board 300.

[0126] In some embodiments, the display device 1000 further includes a reinforcing plate 400 disposed on one side of the printed circuit board 300. The reinforcing plate 400 is used to strengthen the printed circuit board 300 and prevent it from being deformed by impact. One side of the reinforcing plate 400 is connected with the printed circuit board 300. The reinforcing plate 400 can be directly attached to one side of the printed circuit board 300, for example, it can be connected with the printed circuit board 300 by means of an adhesive member such as double-sided tape. The reinforcing plate 400 can be disposed corresponding to the entire area of the printed circuit board 300, or it can be disposed in some areas that need to be strengthened.

[0127] The reinforcing plate 400 is made of a metal material, for example, a metal with a large density such as tungsten, iron, or an alloy material containing tungsten, iron, etc. Of course, the reinforcing plate 400 can also be a polymer material, for example, a film material such as polyester, polyethylene, optical glue, or pressure-sensitive adhesive, etc., which is not limited in the present disclosure.

[0128] In some embodiments, the reinforcing plate 400 is parallel to the printed circuit board 300, which can increase the contact area between the reinforcing plate 400 and the printed circuit board 300 as much as possible, thereby strengthening the printed circuit board 300.

[0129] In some embodiments, the reinforcing plate 400 is located between the support 22 and the printed circuit board 300, one side of the reinforcing plate 400 is connected with the printed circuit board 300, and the other side is connected with the support 22. That is, the printed circuit board 300 is connected with the support 22 through the reinforcing plate 400.

[0130] In some embodiments, in a cross section perpendicular to the length direction of the reel 200, the maximum size of the printed circuit board 300 is equal to the maximum size of the accommodating cavity 201, which means that, within a certain tolerance range, the printed circuit board 300 is located at the widest part of the accommodating cavity 201 of the reel 200, so as to increase the area of the printed circuit board 300 as much as possible.

[0131] In some embodiments, continuing to refer to FIG. 7, the display device 1000 further comprises a first connecting member 500. The first connecting member 500 is disposed in the accommodating cavity 201. The printed circuit board 300 is connected to the flexible display panel 100 through the first connecting member 500.

[0132] The first connecting member 500 can comprise an integrated driving circuit which can generate data signals and pixel driving signals for displaying images based on image data and a timing synchronization signal, and transmit the data signals and driving signals to the flexible display panel 100. The integrated driving circuit is separated from the printed circuit board 300 and the flexible display panel 100, which can avoid directly fixing the Chip On Film (COF) area of the flexible display panel, causing the COF area to fail due to a large tensile stress, and can also avoid bending the area where the integrated driving circuit is located towards the backlight surface, thereby avoiding the integrated driving circuit being bent to the backlight surface, so as to avoid the integrated driving circuit being compressed during the rolling process, and overcoming the problem of the integrated driving circuit being broken.

[0133] The first connecting member 500 can be a Chip On Film (COF) on which a data driver is mounted, but is not limited thereto. For example, the first connecting member 500 can be realized by a Tape Carrier Package (TCP) technology and connect the printed circuit board 300 and the flexible display panel 100 at one end of the reel 200. This is to prevent or reduce the possibility of damage to the printed circuit board 300 due to repeated stress caused by rolling and unrolling.

[0134] The first connecting member 500 can not be rigid, for example, the first connecting member 500 can be a flexible circuit board. The first connecting member 500 can be at least partially positioned in the accommodating cavity 201 in a curved shape.

[0135] In some embodiments, a limiting area is formed between the support 22, the shaft housing 21 and the printed circuit board 300, and the first connecting member 500 can be bent in the limiting area. Specifically, a chip 501 can be disposed on the first connecting member 500. The support 22 is provided with a groove capable of accommodating the chip 501, in which case the limiting area protects the chip 501 from being damaged by falling.

[0136] The first connecting member 500 can be bent multiple times at a position where the chip 501 is not disposed, and the present disclosure does not limit this. For example, continuing to refer to FIG. 7, one end of the first connecting member 500 is connected to the flexible display panel 100, a part thereof is attached to the support 22, and another part thereof is bent multiple times in the limiting area and connected to the printed circuit board 300.

[0137] In this way, the first connecting member 500 with a relatively long size can be accommodated in the accommodating cavity 201.

[0138] In some embodiments, referring to FIG. 7, a portion of the surface of the support 22 interfits with at least a portion of the inner side of the shaft shell 21. Illustratively, the surface of the support 22 is provided with a first protrusion, and the inner side of the shaft shell 21 is provided with a first groove, the first protrusion extending into the first groove and interfitting to prevent the support 22 and the shaft shell 21 from being disassembled in a direction perpendicular to the first protrusion.

[0139] FIG. 14 is a partial exploded view of a display device according to some embodiments of the present disclosure. FIG. 15 is a structural view of a reel according to some embodiments of the present disclosure. FIG. 16 is another structural view of a reel according to some embodiments of the present disclosure.

[0140] In some embodiments, referring to FIG. 14, the shaft shell 21 includes a first shaft shell P1 and a second shaft shell P2, the opening 202 is located at one end of the first shaft shell P1 and the second shaft shell P2, and the other end of the first shaft shell P1 and the second shaft shell P2 is detachably connected; the support 22 is detachably connected with the second shaft shell P2.

[0141] Example 1: The support 22 is provided with a second protrusion relative to the surface of the first shaft shell P1, the first shaft shell P1 is provided with a second groove matched with the second protrusion, and the second protrusion and the second groove are connected by interfitting.

[0142] Example 2: The support 22, the first shaft shell P1 and the second shaft shell P2 are provided with a lapping position, and the support 22, the first shaft shell P1 and the second shaft shell P2 are connected through the lapping position.

[0143] Example 3: Referring to FIG. 15, the first shaft shell P1 and the second shaft shell P2 are connected by screws; the first shaft shell P1 and the support 22 can also be connected by screws.

[0144] In another implementation, referring to FIG. 16, the support 22 is lapped with the second shaft shell P2, the first shaft shell P1 is connected with the support 22 by screws, and the first shaft shell P1 is connected with the second shaft shell P2.

[0145] Along the length direction (the second direction Y) of the reel 200, the connection position of the first shaft shell P1 and the second shaft shell P2 and the connection position of the first shaft shell P1 and the support 22 can not be on the same cross section.

[0146] In some embodiments, the support 22, the first shaft shell P1 and the second shaft shell P2 are integrally formed, which is convenient for preparation. The materials of the support 22, the first shaft shell P1 and the second shaft shell P2 can be hard plastic, metal, etc. The support 22, the first shaft shell P1 and the second shaft shell P2 are formed by profiling to have the reel 200 with the accommodating cavity 201 and the opening 202, and the forming mode can be injection molding or Computer Numerical Control (CNC) molding.

[0147] In some embodiments, the shaft shell 21 is detachably connected with the support 22, and the connection manner can refer to the connection manner of the first shaft shell P1 and the second shaft shell P2 described above, which will not be repeated here.

[0148] FIG. 17 is a partial structural view of a display device according to some embodiments of the present disclosure. FIG. 18 is another partial structural view of a display device according to some embodiments of the present disclosure.

[0149] In some embodiments, referring to FIGS. 17 and 18, the display device 1000 further includes a system mainboard 600 disposed outside the reel 200. The system mainboard 600 can be provided with power lines for supplying power to each component and / or signal lines for transmitting and receiving electrical signals. The printed circuit board 300 is connected to the system mainboard 600 through a second connecting member 700. In some examples, a plurality of second connecting members 700 can be provided. The system mainboard 600 can be connected with a power supply unit to transmit signals and power for displaying images on the flexible display panel 100. The second connecting member 700 serves as a passage for connecting the printed circuit board 300 contained in the reel 200 to an external structure such as the system mainboard 600.

[0150] The second connecting member 700 can be a shaft. One end of the shaft is connected with the printed circuit board 300, and the other end is connected with the system mainboard 600. The shaft can change the degree of bending to maintain the electrical connection between the printed circuit board 300 and the system mainboard 600. For example, the shaft can be formed by winding a plurality of signal lines, and the diameter of the shaft can be 1 mm to 5 mm, such as 1 mm, 2 mm, 3 mm, 3.5 mm, 4 mm, 5 mm, etc. The second connecting member 700 can also be a flexible flat cable (FFC), and the thickness of the FFC can be less than or equal to 0.2 mm, such as 0.2 mm, 0.1 mm, etc. The thickness of the FFC cannot be too thick, otherwise it will occupy a larger space in the accommodation cavity 201, which is not conducive to reducing the volume of the reel 200. The second connecting member 700 can also be other connecting members that can electrically connect the printed circuit board 300 and the system mainboard 600.

[0151] In some embodiments, the second connecting member 700 is connected to the printed circuit board 300 at one end and to the system main board 600 at the other end. That is, the length of the second connecting member 700 is greater than the distance between the printed circuit board 300 and the system main board 600. As the flexible display panel 100 is wound and unwound on the reel 200, the printed circuit board 300 rotates with the reel 200, and the distance between the printed circuit board 300 and the system main board 600 at the connection of the second connecting member 700 changes. Therefore, the second connecting member 700 is wound around the rotation axis of the reel 200 at least one turn, so that the second connecting member 700 is elongated or contracted as the flexible display panel 100 is wound and unwound on the reel 200, and the second connecting member 700 can compensate for the length difference between the flexible display panel 100 and the printed circuit board 300 due to the winding operation, preventing the length from being too small to cause the second connecting member 700 to break.

[0152] In some embodiments, referring back to FIG. 14, the display device 1000 further includes at least one connecting shaft 81. The connecting shaft 81 is disposed at one end of the reel 200. The connecting shaft 81 can include a rotation shaft 811 and a connecting member 812, the rotation shaft 811 being connected to the connecting member 812, and the connecting member 812 being connected to one end of the reel 200, and the rotation shaft 811 rotating to drive the reel 200 to rotate.

[0153] Referring to FIG. 17, the first connecting member 700 passes through the connecting member 812 to connect the printed circuit board 300 mounted inside the reel 200 and the system main board 600 disposed outside the reel 200. As the flexible display panel 100 is unwound, the more it is unwound, the more turns the first connecting member 700 winds around the rotation shaft 811.

[0154] In some embodiments, the display device 1000 further includes a housing (not shown). The reel 200, the system main board 600, and the second connecting member 700 are all located in the housing, which can be designed in a circular, elliptical, rectangular, or polygonal shape. The housing is provided with a strip-shaped slot extending in the second direction Y, and the reel 200 is located in the housing, with the strip-shaped slot opposite the opening 202 of the reel 200. The flexible display panel 100 extends from the strip-shaped slot through the opening 202 and is wound on the reel 200.

[0155] In some embodiments, the rotation of the reel 200 can be caused by a physical external force directly provided by a user.

[0156] In some embodiments, referring to FIG. 17, the display device 1000 further comprises a driving mechanism 900. The driving mechanism 900 can be located in the housing. The driving mechanism 900 is connected with the reel 200 to drive the reel 200 to rotate, and in turn drive the flexible display panel 100 to be wound or unwound on the reel 200. The driving mechanism 900 can be driven to rotate the reel 200 in response to a predetermined signal. The driving mechanism 900 is connected with the system mainboard 600, and the system mainboard 600 transmits a signal to the driving mechanism 900, and the driving mechanism 900 drives the reel 200 to rotate.

[0157] For example, the driving mechanism 900 comprises a first gear and a second gear. The first gear is located on one side of the reel 200 and connected with the rotating shaft of the reel 200. The second gear is engaged with the first gear. The second gear is driven to rotate, and in turn drives the first gear to rotate, and in turn drives the rotating shaft to rotate, so that the reel 200 is driven to rotate, and in turn drives the flexible display panel 100 to be wound or unwound on the reel 200. The second gear can be connected with a motor, and the motor drives the second gear to rotate. The driving mechanism 900 can also be other devices that can drive the reel 200 to rotate, which will not be described here.

[0158] In some embodiments, referring to FIG. 17, the display device 1000 further comprises a support rail 901. The support rail 901 extends in a direction parallel to the length direction of the reel 200. The support rail 901 is located outside the reel 200 and supports the flexible display panel 100. The support rail 901 can change the unwinding direction of the flexible display panel 100 to adapt to various conditions of image display.

[0159] The above description is only a specific embodiment of the present disclosure, but the protection scope of the present disclosure is not limited thereto. Any person skilled in the art can think of changes or replacements within the technical scope disclosed by the present disclosure, which should be covered by the protection scope of the present disclosure. Therefore, the protection scope of the present disclosure should be subject to the protection scope of the claims.

Claims

1. A display device, comprising: a reel having a receiving cavity and an opening, the receiving cavity and the opening being in communication; the reel comprising: a shaft shell; and a support connected to the shaft shell; at least a portion of the support is opposite to an inner side of the shaft shell; a flexible display panel; a starting section of the flexible display panel is located between the inner side of the shaft shell and the support; the flexible display panel is wound around an outer side of the shaft shell from inside the receiving cavity to outside the receiving cavity through the opening; the starting section of the flexible display panel is connected to the support; and a printed circuit board located in the receiving cavity; the printed circuit board is configured to be connected to the flexible display panel.

2. The display device according to claim 1, wherein One side of the starting section of the flexible display panel is connected to the support, and the other side is connected to the inner side of the shaft shell.

3. The display device of claim 2, wherein, The support and the shaft shell press the starting section of the flexible display panel.

4. The display device according to any one of claims 1 to 3, wherein The inner side of the shaft shell is provided with a protective layer, and the protective layer is arranged opposite to at least the starting section of the flexible display panel.

5. The display device according to claim 1, wherein A side surface of the support close to the flexible display panel comprises a connecting area and a transition area; the connecting area is connected to the flexible display panel, and the connecting area is planar or curved; the transition area is located at the opening, and the transition area is curved.

6. The display device of claim 5, wherein, The outer side of the shaft shell is curved, and the radius of the curve of the transition area is smaller than the radius of the curve of the outer side of the shaft shell.

7. The display device according to claim 1, wherein A side surface of the support close to the flexible display panel is provided with a protrusion, and one end of the flexible display panel is located between the protrusion and the opening.

8. The display device according to claim 1, wherein The starting section of the flexible display panel, the support and the printed circuit board are sequentially stacked.

9. The display device of claim 8, wherein, The printed circuit board is configured to be connected to the support. 10.The display device of claim 8, further comprising: a reinforcing plate arranged on one side of the printed circuit board. 11.The display device of claim 1, further comprising: a first connecting member arranged in the receiving cavity; the printed circuit board is connected to the flexible display panel through the first connecting member.

12. The display device of claim 11, wherein, The first connecting member is provided with a chip, and the support is provided with a groove capable of accommodating the chip.

13. The display device of claim 1, wherein, In a cross section perpendicular to a length direction of the reel, a maximum dimension of the printed circuit board is equal to a maximum dimension of the receiving cavity.

14. The display device of claim 1, wherein, The shaft shell and the support are detachably connected; and / or, The shaft shell comprises a first shaft shell and a second shaft shell, the first shaft shell and the second shaft shell are detachably connected; the support and the second shaft shell are detachably connected. 15.The display device of claim 1, further comprising: a housing; the reel is located in the housing; a system mainboard arranged in the housing; a second connecting member arranged in the housing; the system mainboard is connected to the printed circuit board through the second connecting member.

16. The display device of claim 15, wherein, A length of the second connecting member is greater than a distance between the printed circuit board and the system mainboard. 17.The display device of claim 15, further comprising: a driving mechanism connected to the reel to drive the reel to rotate.

Images