Flexible display screen and display device

Abstract

The application relates to a flexible display screen and a display device, the flexible display screen comprising a driving substrate and a plurality of light-emitting chips; the driving substrate comprising a first substrate, a first driving circuit and a second driving circuit, the first substrate comprising rigid fixing parts and flexible expansion parts arranged alternately, and the first substrate being capable of being stretched and contracted; the light-emitting chips comprising first light-emitting chips arranged on a first surface of the first substrate and second light-emitting chips arranged on a second surface of the first substrate, the first light-emitting chips and the second light-emitting chips being arranged on the rigid fixing parts alternately; each first light-emitting chip being electrically connected with the first driving circuit, and each second light-emitting chip being electrically connected with the second driving circuit. In the flexible display screen, the interval between the adjacent first light-emitting chips and the second light-emitting chips is the interval between the adjacent two rigid fixing parts, the uniform arrangement of the pixels of the flexible display screen in the stretched state is ensured, and the display effect of the flexible display screen in the stretched state is improved.

Description

Technical Field

[0001] This application relates to the field of flexible display screens, and more particularly to a flexible display screen and display device. Background Technology

[0002] Stretchable flexible displays refer to displays with a certain degree of elasticity and deformation capability, which can adapt to diverse application scenarios. Currently, during the stretching process, stretchable flexible displays increase the distance between pixels, resulting in a difference in pixel density before and after stretching. In other words, as the flexible display stretches, its pixel density decreases synchronously, thereby significantly reducing the display resolution and affecting the sharpness of the displayed image.

[0003] A stretchable display panel now exists that addresses the aforementioned issues. It consists of two stretchable displays stacked vertically. When stretched, both the upper and lower stretchable displays are visible, allowing the lower layer's light-emitting chips to supplement the pixels. However, in practical use, this type of display panel cannot guarantee that the light-emitting chips in the lower stretchable display will perfectly align with the gaps between the chips in the upper stretchable display when stretched. In other words, after stretching, the lower layer's light-emitting chips are prone to misalignment relative to the upper layer. This results in uneven pixel arrangement, leading to pixel distortion and image falsification, severely impacting the display quality when stretched and reducing user experience.

[0004] Therefore, improving the display effect of flexible displays when stretched is an urgent problem to be solved. Summary of the Invention

[0005] In view of the shortcomings of the above-mentioned related technologies, the purpose of this application is to provide a flexible display screen and display device, which aims to solve the technical problem of poor display effect of flexible display screen in a stretched state.

[0006] A flexible display screen, comprising:

[0007] Driving substrate, several light-emitting chips;

[0008] The driving substrate includes a first substrate, a first driving circuit, and a second driving circuit. The first substrate includes alternately arranged rigid fixing parts and flexible telescopic parts, and the first substrate is capable of telescopic deformation.

[0009] The light-emitting chip includes a first light-emitting chip disposed on a first surface of the first substrate and a second light-emitting chip disposed on a second surface of the first substrate, with the first surface and the second surface disposed opposite to each other; the first light-emitting chip and the second light-emitting chip are alternately disposed on the rigid fixing part; each first light-emitting chip is electrically connected to the first driving circuit and each second light-emitting chip is electrically connected to the second driving circuit.

[0010] In the aforementioned flexible display screen, the first and second light-emitting chips are alternately disposed on the rigid fixing parts of the first substrate. This ensures that each second light-emitting chip is located between two adjacent first light-emitting chips, forming pixel supplementation for the flexible display screen in the stretched state. This not only solves the problem of reduced pixel density after the flexible display screen is stretched, ensuring that the stretched flexible display screen still has high resolution and increasing the fineness of the displayed image, but also ensures that the first and second light-emitting chips are both disposed on the first substrate. Furthermore, since both the first and second light-emitting chips are disposed on the first substrate, they can also be synchronously shifted with the stretching and contraction of the first substrate. During stretching or contraction, the distance between adjacent first and second light-emitting chips is the same as the distance between two adjacent rigid fixing parts. This avoids misalignment of the second light-emitting chips after stretching, resulting in a more uniform pixel arrangement in the stretched flexible display screen, better image realism, improved display effect in the stretched flexible display screen, and a better user experience.

[0011] Based on the same inventive concept, this application also provides a display device, comprising:

[0012] The flexible display screen described above, and the electrical connection assembly, the electrical connection assembly including a connection circuit configured to be electrically connected to the first drive circuit and the second drive circuit in the stretched drive substrate.

[0013] The aforementioned display device not only solves the problem of reduced pixel density after stretching of the flexible display screen, but also ensures that the spacing between adjacent first and second light-emitting chips is the same as the spacing between two adjacent rigid fixing parts. This avoids misalignment of the second light-emitting chip after stretching, resulting in a more uniform pixel arrangement and better image realism in the stretched state, thus improving the display effect and user experience. Simultaneously, the inclusion of electrical connection components facilitates electrical connections between the first and second driving circuits, leading to better control of the flexible display screen. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the structure of a flexible display screen provided in an embodiment of this application;

[0015] Figure 2Another structural schematic diagram of the flexible display screen provided in the embodiments of this application;

[0016] Figure 3 A schematic diagram of the rigid fixing part and the flexible telescopic part of the first substrate provided in the embodiments of this application;

[0017] Figure 4 A schematic diagram of the structure of the driving substrate provided in the embodiment of this application, which includes a first substrate and a second substrate, in a contracted state;

[0018] Figure 5 Provided for the embodiments of this application Figure 4 The diagram shows the structure of the flexible display screen after it has been stretched.

[0019] Figure 6 A schematic diagram of the structure of the drive substrate in a contracted state when both the first drive circuit and the second drive circuit are disposed on the first substrate, as provided in the embodiments of this application;

[0020] Figure 7 Provided for the embodiments of this application Figure 6 The diagram shows the structure of the flexible display screen after it has been stretched.

[0021] Figure 8 A schematic diagram of the structure of a first driving circuit provided in an embodiment of this application;

[0022] Figure 9 A schematic diagram of a reflective layer provided in an embodiment of this application;

[0023] Figure 10 This is another schematic diagram of the reflective layer provided in the embodiments of this application;

[0024] Figure 11 This is another schematic diagram of the structure of the reflective layer provided in the embodiments of this application;

[0025] Figure 12 A schematic diagram of the structure of a display device provided in another optional embodiment of this application;

[0026] Figure 13 A schematic diagram of an electrical connection assembly provided in another optional embodiment of this application;

[0027] Figure 14 A schematic diagram of a connection circuit mounted on a fixed base, provided in another optional embodiment of this application;

[0028] Explanation of reference numerals in the attached figures:

[0029] 1-First substrate, 101-First surface, 102-Second surface, 2-Second encapsulation layer, 3-First light-emitting chip, 4-Second light-emitting chip, 5-First driving circuit, 6-Rigid guide rail, 7-Connection circuit, 8-First elastic element, 9-Second substrate, 10-Second driving circuit, 11-Elastic protective layer, 12-First encapsulation layer, 13-Second elastic element, 14-Fixing base, 15-Reflective layer, 16-Rigid fixing part, 17-Flexible telescopic part. Detailed Implementation

[0030] To facilitate understanding of this application, a more complete description will be provided below with reference to the accompanying drawings. Preferred embodiments of this application are shown in the drawings. However, this application can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided to provide a more thorough and complete understanding of the disclosure of this application.

[0031] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used herein in the specification of this application is for the purpose of describing particular embodiments only and is not intended to be limiting of this application.

[0032] To address the issue that stretching a flexible display reduces pixel density, lowers resolution, and consequently decreases image sharpness, a stretchable display panel is proposed. This panel consists of two stretchable displays stacked vertically. When stretched, both the upper and lower stretchable displays are active, allowing the lower layer's light-emitting chip to supplement the pixels.

[0033] In practical use, this type of display panel cannot guarantee that, when stretched, the light-emitting chips of the lower stretchable display will correspond precisely to the gaps between the light-emitting chips of the upper stretchable display. In other words, after the upper and lower stretchable displays are stretched, the light-emitting chips of the lower layer are prone to misalignment relative to the upper layer. This results in uneven pixel arrangement, leading to pixel distortion and image falsification, severely impacting the display effect when stretched and reducing the user experience.

[0034] Therefore, this application aims to provide a solution that can solve the above-mentioned technical problems, the details of which will be described in subsequent embodiments.

[0035] Example of this application:

[0036] This embodiment provides a flexible display screen, which is a stretchable flexible display screen that can be applied to, but is not limited to, various display fields such as smart mobile terminals, smart wearable devices, large screens, billboards, signs, and televisions.

[0037] In this embodiment, as Figures 1-8 As shown, the flexible display screen includes a driving substrate and several light-emitting chips;

[0038] Among them, such as Figure 5 The driving substrate includes a first substrate 1, a first driving circuit 5, and a second driving circuit 10. The first substrate 1 includes alternately arranged rigid fixing portions 16 and flexible telescopic portions 17, and the first substrate 1 is capable of stretching and deforming. The rigid fixing portions 16 are non-deformable parts; the flexible telescopic portions 17 are parts capable of elastic stretching and deforming, used to achieve flexible stretching and deforming of the first substrate 1, that is, to achieve flexible stretching and deforming of the driving substrate. Specifically, the stretching and deforming of the first substrate 1 includes stretching and contraction along a straight line, and may also include bending deformation of the first substrate 1. In this embodiment, the flexible telescopic portions 17 are made of an elastic material capable of stretching and deforming, and the elastic coefficient of each flexible telescopic portion 17 is the same.

[0039] It should be understood that, such as Figure 3 , Figure 5 The rigid fixing part 16 and the flexible telescopic part 17 are alternately arranged, with one rigid fixing part 16 followed by one flexible telescopic part 17, and so on, cyclically arranged in this manner. Furthermore, when the first substrate 1 extends or retracts linearly, the rigid fixing part 16 and the flexible telescopic part 17 can be alternately arranged in the direction of the extension and retraction deformation of the first substrate 1. It is understood that the distance between any two adjacent rigid fixing parts 16 is equal, that is, the distance between the midpoints of any two adjacent rigid fixing parts 16 is equal in the direction of the extension and retraction deformation of the first substrate 1. This ensures that during the extension and retraction of the display screen, the position of each second light-emitting chip 4 is stably located at the midpoint between two adjacent first light-emitting chips 3.

[0040] In this embodiment, the first substrate 1 is a transparent substrate, which can be a glass substrate, that is, a glass substrate made of glass for the rigid fixing part 16. Of course, it can also be a transparent substrate made of transparent plastic, as long as the first substrate 1 can transmit light. This embodiment does not impose any specific restrictions on this.

[0041] Alternatively, the first driving circuit 5 and the second driving circuit 10 can be made of a non-stretchable conductive metal material. In this case, to ensure the stretching of the driving substrate, the first driving circuit 5 and the second driving circuit 10 need to reserve a certain length in the stretching direction of the driving substrate. This reserved length allows the driving substrate to stretch normally. Alternatively, the first driving circuit 5 and the second driving circuit 10 can also be made of a stretchable conductive material, such as silver nanowires or graphene, and the elastic modulus of the first driving circuit 5 and the second driving circuit 10 must be greater than or equal to the elastic modulus of the flexible stretching part 17.

[0042] Meanwhile, the first driving circuit 5 and the second driving circuit 10 can be made of light-transmitting conductive materials, such as the graphene mentioned above; or, both can be made of opaque conductive materials. The first driving circuit 5 and the second driving circuit 10 are non-integral conductive circuits, and the use of opaque conductive materials will not affect the emission of light from the light-emitting surface.

[0043] The light-emitting chip in this embodiment includes a first light-emitting chip 3 disposed on a first surface 101 of a first substrate 1 and a second light-emitting chip 4 disposed on a second surface 102 of a first substrate 1, with the first surface 101 and the second surface 102 disposed opposite to each other; the first light-emitting chip 3 and the second light-emitting chip 4 are alternately disposed on a rigid fixing part 16; each first light-emitting chip 3 is electrically connected to a first driving circuit 5, and each second light-emitting chip 4 is electrically connected to a second driving circuit 10.

[0044] It should be understood that the first light-emitting chip 3 and the second light-emitting chip 4 can be, but are not limited to, LED light-emitting chips. When they are LED light-emitting chips, they can include, but are not limited to, ordinary-sized LEDs, and can also include micro LED chips, such as, but not limited to, Mini-LEDs and Micro-LEDs. A micro LED chip includes an epitaxial layer and electrodes disposed on the epitaxial layer, including positive and negative electrodes. This embodiment does not impose specific limitations on this. Furthermore, the chip electrodes of the first light-emitting chip 3 and the second light-emitting chip 4 are electrically connected to their respective driving circuits via bonding materials. The bonding materials can be, but are not limited to, solder or anisotropic conductive adhesive. The solder is a low-melting-point material, such as a gold-tin alloy, indium, or indium tin oxide.

[0045] In addition, such as Figures 1-5The first light-emitting chip 3 and the second light-emitting chip 4 can be alternately disposed on the rigid fixing part 16 along the stretching direction of the first substrate 1. The alternating placement of the first light-emitting chip 3 and the second light-emitting chip 4, with one first light-emitting chip 3 followed by one second light-emitting chip 4, is repeated cyclically. The alternating placement of the first light-emitting chip 3 and the second light-emitting chip 4 on the rigid fixing part 16 of the first substrate 1 ensures that each second light-emitting chip 4 is located between two adjacent first light-emitting chips 3, thus supplementing the pixels of the flexible display screen under stretching conditions and solving the problem of reduced pixel density after stretching. This allows the stretched flexible display screen to still have high resolution, increasing the detail of the displayed image.

[0046] During use, when the flexible display screen is in a retracted state, its display can be controlled by the first driving circuit 5 to light up the first light-emitting chip 3; when the flexible display screen is in a stretched state, its display can be controlled by the first driving circuit 5 to light up the first light-emitting chip 3, and by the second driving circuit 10 to light up the second light-emitting chip 4.

[0047] Because both the first light-emitting chip 3 and the second light-emitting chip 4 are mounted on the rigid fixing part 16, the spacing between them is guaranteed to be the same as the spacing between two adjacent rigid fixing parts 16. Therefore, during extension and retraction, both the first light-emitting chip 3 and the second light-emitting chip 4 can move synchronously with the rigid fixing part 16, improving the stability of their relative positions. This ensures that during the extension and retraction of the display screen, each second light-emitting chip 4 remains stably positioned in the middle between two adjacent first light-emitting chips 3. This avoids misalignment of the second light-emitting chips 4 after extension, resulting in a more uniform pixel arrangement and better image fidelity in the extended state, thus improving the display effect and user experience.

[0048] In this embodiment, the first driving circuit 5 and the second driving circuit 10 can be configured in, but are not limited to, the following two examples:

[0049] In some implementations, such as Figure 2 , Figure 6 , Figure 7 As shown, the first driving circuit 5 and the second driving circuit 10 are both disposed on the first substrate 1, and the first driving circuit 5 is located on the first surface 101 of the first substrate 1, and the second driving circuit 10 is located on the second surface 102 of the first substrate 1.

[0050] Understandably, the second light-emitting chip 4 is fixed on the rigid fixing part 16 of the first substrate 1 and is electrically connected to the pads of the second driving circuit 10. During the stretching process of the flexible screen, it can ensure that both the first light-emitting chip 3 and the second light-emitting chip 4 move synchronously with the stretching of the first substrate 1, and the structure of the driving substrate is simple.

[0051] In this configuration, at least the pad portions of the first driving circuit 5 and the second driving circuit 10 are fixed to the rigid fixing portion 16 of the first substrate 1. Figure 2 The first light-emitting chip 3 is bonded to the pads of the first driving circuit 5 and thus disposed on the rigid fixing portion 16 of the first substrate 1; the second light-emitting chip 4 is bonded to the pads of the second driving circuit 10 and thus disposed on the rigid fixing portion 16 of the first substrate 1. Furthermore, when the first driving circuit 5 and the second driving circuit 10 are made of stretchable material, both can be directly fixed to the back surface of the first substrate 1 by adhesion or other connection methods; when the first driving circuit 5 and the second driving circuit 10 are made of non-stretchable material, at least the portions 501 of the first driving circuit 5 and the second driving circuit 10 corresponding to the flexible telescopic portion 17 of the first substrate 1 have a pleated or wavy curved shape. This pleated or wavy curved shape allows for the extension and retraction of the two driving circuits in length. Of course, other arrangements that allow for the extension and retraction of the two driving circuits in length can also be used; this example does not specifically limit this.

[0052] In addition, the first light-emitting chip 3, the second light-emitting chip 4 and the pad are bonded together by bonding material. The bonding material can be, but is not limited to, solder or anisotropic conductive adhesive. The solder must be a material with a low melting point, such as gold-tin alloy, indium, indium tin oxide and other materials.

[0053] In some implementations, such as Figure 1 , Figure 4 , Figure 5 As shown, the driving substrate also includes a second substrate 9 stacked with the first substrate 1. The first driving circuit 5 is disposed on the first substrate 1, and the second driving circuit 10 is disposed on the second substrate 9. The second substrate 9 includes alternately arranged rigid fixing portions 16 and flexible telescopic portions 17. The second substrate 9 is configured to be able to telescopically deform synchronously with the first substrate 1. The position of the rigid fixing portion 16 in the second substrate 9 corresponds to the position of the rigid fixing portion 16 in the first substrate 1, and the position of the flexible telescopic portion 17 in the second substrate 9 corresponds to the position of the flexible telescopic portion 17 in the first substrate 1.

[0054] It should be understood that the stacking arrangement only refers to the stacking arrangement in the vertical direction, and does not limit the first substrate 1 and the second substrate 9 to being in contact with each other. It is understood that the first substrate 1 and the second substrate 9 have the same structure, and the elastic coefficients of the flexible expansion portions 17 of the first substrate 1 and the second substrate 9 are the same, or the flexible expansion portions 17 of the first substrate 1 and the second substrate 9 can be made of the same material. This allows the second substrate 9 and the first substrate 1 to expand and contract synchronously. Furthermore, the second substrate 9 can be made of a transparent material, such as a glass substrate; the second substrate 9 can also be an opaque substrate, which can be, but is not limited to, a ceramic substrate, a silicon substrate, or a PCB substrate. It is understood that the arrangement of the first driving circuit 5 on the first substrate 1 and the arrangement of the second driving circuit 10 on the second substrate 9 can be the same as the arrangement of the first driving circuit 5 and the second driving circuit 10 on the first substrate 1 in the previous embodiment, and will not be described in detail here.

[0055] Understandably, the light-emitting end of the second light-emitting chip 4 is fixed to the rigid fixing part 16 of the first substrate 1, and the bonding end of the second light-emitting chip 4 is fixed to the rigid fixing part 16 of the second substrate 9, with the light-emitting end and the bonding end facing each other. Specifically, the bonding end of the second light-emitting chip 4 is the end of the second light-emitting chip 4 where the electrode is disposed, and the electrode of the second light-emitting chip 4 is bonded to the pad of the second driving circuit 10 fixed on the rigid fixing part 16 of the second substrate 9, thus fixing the bonding end of the second light-emitting chip 4 on the rigid fixing part 16 of the second substrate 9.

[0056] like Figures 9-11 As shown, a reflective layer 15 is provided on one side of the second surface 102 of the first substrate 1. The reflective layer 15 reflects the light emitted by the first light-emitting chip 3 and the second light-emitting chip 4, so that the light is emitted from one side of the first surface 101 of the first substrate 1. The reflective layer 15 can improve the light utilization rate and increase the brightness of the display screen.

[0057] Understandable, such as Figure 11 The reflective layer 15 can be disposed on the lower surface of the second encapsulation layer 2, or, as... Figure 9 A structure disposed on the upper or lower surface of the second substrate 9. Another example, such as... Figure 10 When the second light-emitting chip 4 is bonded to the back surface of the first substrate 1, the reflective layer 15 can also be disposed on the lower surface of the first substrate 1, covering the light-emitting surface of the second light-emitting chip 4 and surrounding the second light-emitting chip 4, so that the light emitted by the second light-emitting chip 4 is emitted from one side of the first surface 101 of the first substrate 1. In this embodiment, "up" and "down" only indicate the relative position and are not intended as specific limitations in direction.

[0058] Because the elastic coefficients of the flexible stretching portions 17 of the first substrate 1 and the second substrate 9 are the same, and the structures of the first substrate 1 and the second substrate 9 are also the same, synchronous stretching or contraction deformation of the first substrate 1 and the second substrate 9 during the stretching process can be guaranteed. The light-emitting end of the second light-emitting chip 4 is fixed to the rigid fixing portion 16 of the first substrate 1, and the bonding end of the second light-emitting chip 4 is fixed to the corresponding rigid fixing portion 16 on the second substrate 9, making the fixation of the second light-emitting chip 4 better. During the stretching process of the flexible display screen, the second light-emitting chip 4 also moves synchronously with the first light-emitting chip 3, ensuring the uniformity of the spacing between the two. The position of the second light-emitting chip 4 is stable during the stretching process, ensuring the uniformity of the pixel arrangement of the flexible display screen under stretching conditions. Furthermore, the light emission from the front side of the first substrate 1 is also better for the second light-emitting chip 4.

[0059] In addition, the light-emitting end of the light-emitting chip can be fixed to the rigid fixing part 16 of the first substrate 1 by means of transparent adhesive, or other fixing methods that can ensure the normal light emission of the second light-emitting chip 4 can be used.

[0060] In this embodiment, as Figure 11 The flexible display screen also includes a first encapsulation layer 12 and a second encapsulation layer 2. The first encapsulation layer 12 includes several separate encapsulation units, each encapsulation unit corresponding to a light-emitting chip, and the encapsulation unit at least partially covers the light-emitting surface of its corresponding light-emitting chip. The first encapsulation layer 12 can protect the light-emitting chip, preventing scratches and oxidation. Specifically, the material of the first encapsulating adhesive can be selected as transparent epoxy resin or silicone resin.

[0061] The second encapsulation layer 2 includes a first flexible encapsulation layer disposed on the first surface 101 of the first substrate 1, which covers the first light-emitting chip 3. Furthermore, the second encapsulation layer 2 may also include a second flexible encapsulation layer disposed on the second surface 102 of the first substrate 1, which covers the second light-emitting chip 4. The second encapsulation layer 2 must possess flexible deformation characteristics, and the elastic coefficient of the flexible deformation must not be less than the elastic coefficient of the flexible expansion portion 17 of the first substrate 1. Specifically, the second encapsulation layer 2 may be made of a transparent flexible polyimide material. The second encapsulation layer 2 is an integral encapsulation used to protect the driving substrate and the light-emitting chip.

[0062] Another optional embodiment of this application:

[0063] This embodiment provides a display device, such as... Figure 12 As shown, the display device includes the aforementioned flexible display screen and electrical connection components.

[0064] The electrical connection components in this embodiment, such as Figure 10As shown, the electrical connection assembly includes a connection circuit 7, which is configured to be electrically connected to the first drive circuit 5 and the second drive circuit 10 in the stretched drive substrate, as follows: Figure 7 As shown.

[0065] Through the connection circuit 7 of the electrical connection component, the electrical connection between the first driving circuit 5 and the second driving circuit 10 can be realized after the driving substrate is stretched. After the two are electrically connected, the first light-emitting chip 3 and the second light-emitting chip 4 can emit light at the same time. The light emission of the second light-emitting chip 4 forms a supplement to the pixels of the stretched flexible display screen.

[0066] In this embodiment, the connection circuit 7 is located at the stretching end of the driving substrate, that is, the connection circuit 7 is electrically connected to the first driving circuit 5 and the second driving circuit 10 when the driving substrate is being stretched and the stretching is about to end. The connection circuit 7 is made of a conductive material, such as... Figure 13 , Figure 14 The connecting circuit 7 has a portion that contacts the first driving circuit 5 and a portion that contacts the second driving circuit 10. Simultaneously, the first driving circuit 5 and the second driving circuit 10 also have corresponding portions that contact the connecting circuit 7.

[0067] In this embodiment, the display device may not have a connection circuit. In this case, an electronic control unit can be used to control the first driving circuit 5 and the second driving circuit 10 respectively. That is, a first preset condition and a second preset condition are set. Under the first preset condition, the first driving circuit 5 is controlled to drive the first light-emitting chip 3 to emit light. Under the second preset condition, while the first light-emitting chip 3 emits light, the second driving circuit 10 is also controlled to drive the second light-emitting chip 4 to emit light. In this embodiment, both the first preset condition and the second preset condition can be when the flexible display screen is stretched to a preset length, or when the flexible display screen is stretched for a certain period of time.

[0068] The electrical connection assembly in this embodiment also includes a first elastic element 8, such as... Figure 12 The connecting circuit 7 is disposed on the first elastic element 8, which supports extension and contraction at least in the stretching direction of the driving substrate. Through the action of the first elastic element 8, after the flexible display screen is stretched and contacts the connecting circuit 7, the flexible display screen can compress the first elastic element 8 and continue to stretch a certain distance. When the first light-emitting chip 3 and the second light-emitting chip 4 emit light simultaneously, the flexible display screen can still continue to stretch, improving the adaptability of the flexible display screen and expanding its application range.

[0069] In addition, such as Figure 13In this embodiment, the electrical connection assembly further includes a second elastic member 13. After the second elastic member 13 is compressed in the stretching direction of the driving substrate, the side of the second elastic member 13 facing the driving substrate is flush with the side where the connection circuit 7 is located. That is, the side of the compressed second elastic member 13 facing the driving substrate and the side of the connection circuit 7 facing the driving substrate are both located on the same plane.

[0070] The flexible display screen also includes a contact portion that contacts the second elastic member 13. During the stretching process of the flexible display screen, the contact portion comes into contact with the second elastic member 13, and the second elastic member 13 is compressed by the pressure of the contact portion. Therefore, the second elastic member 13 not only forms a buffer against the stretching movement, but also makes the stretching of the flexible display screen more stable. The contact portion that contacts the second elastic member 13 can be the second encapsulation layer 2, or the contact portion can be a separate contact portion provided for the flexible display screen to contact the second elastic member 13.

[0071] Simultaneously, because the second elastic element 13 is compressed, its end face can be flush with the connecting circuit 7, and the ends of the first driving circuit 5 and the second driving circuit 10 facing the connecting circuit 7 are also flush with each other. Both ends are flush with the end face of the driving substrate facing the electrical connection assembly, or their ends may extend beyond the end face of the driving substrate facing the electrical connection assembly. At this time, the ends of the first driving circuit 5 and the second driving circuit 10 facing the connecting circuit 7 are the parts that contact the connecting circuit 7, thereby achieving electrical connection between the first driving circuit 5, the second driving circuit 10, and the connecting circuit 7 after stretching.

[0072] In this embodiment, the first elastic element 8 and the second elastic element 13 are made of elastic materials that can be compressed and elastically restored. For example, they are made of rubber. This embodiment does not specifically limit the materials of the first elastic element 8 and the second elastic element 13.

[0073] Understandably, the second elastic element 13 can be connected to the side of the first elastic element 8 opposite to the driving substrate. In this case, the connection circuit 7 can also be located on the side of the first elastic element 8 opposite to the driving substrate, or, as... Figure 10 , Figure 11 Alternatively, a fixing seat 14 can be provided on the side of the first elastic member 8 opposite to the driving substrate, and the connection circuit 7 can be disposed on the fixing seat 14. Disposing the connection circuit 7 on the fixing seat 14 can make the shape of the connection circuit 7 more stable.

[0074] Understandable, such as Figure 13The second elastic element 13 and the first elastic element 8 can be an integral structure, which simplifies fabrication. The connection circuit 7 can be configured similarly to the previous example. When the second elastic element 13 is connected to the first elastic element 8 or is an integral structure, the extended end of the second elastic element 13 can be directly connected to the contact portion. The second elastic element 13 ensures that the flexible display screen is restricted from the moment it begins to stretch, allowing for smooth expansion and contraction.

[0075] In another example, the second elastic member 13 is not connected to the first elastic member 8, that is, the second elastic member 13 can be fixed to other parts other than the first elastic member 8, for example, it can be set on the fixed frame of the display screen.

[0076] In this embodiment, as Figure 4 , Figure 12 The display device also includes a rigid guide rail 6, which is arranged along the stretching direction of the drive substrate and is used to guide the extension and retraction of the drive substrate.

[0077] Guided by the rigid guide rail 6, the flexible display screen extends and retracts more smoothly, preventing vertical fluctuations and resulting in better image display. The rigid guide rail 6 can be placed below the driving substrate and slides with it to guide the screen, either directly or in conjunction with the second encapsulation layer 2. Furthermore, the rigid guide rail 6 can be secured to the display screen frame during installation.

[0078] To improve the sliding fit between the rigid guide rail 6 and the driving substrate or the second encapsulation layer 2, an elastic protective layer 11 can be provided on the lower surface of the driving substrate or the lower surface of the second encapsulation layer 2, such as... Figure 12 The elastic protective layer 11 facilitates the sliding of the drive substrate or the second encapsulation layer 2 on the rigid guide rail 6 and also provides protection. When the drive substrate includes the second substrate 9, the elastic protective layer 11 forms a protection for the second substrate 9.

[0079] The aforementioned display device not only solves the problem of reduced pixel density after the flexible display screen is stretched, but also ensures that the spacing between adjacent first light-emitting chips 3 and second light-emitting chips 4 is the same as the spacing between two adjacent rigid fixing parts 16. This avoids misalignment of the second light-emitting chips 4 after stretching, resulting in a more uniform pixel arrangement and better image realism in the stretched state, thus improving the display effect and user experience. Simultaneously, the electrical connection components facilitate the electrical connection between the first driving circuit 5 and the second driving circuit 10. Furthermore, the rigid guide rail 6 prevents vertical fluctuations during the stretching and contraction of the flexible display screen, further enhancing its display effect.

[0080] It should be understood that the application of this application is not limited to the examples above. Those skilled in the art can make improvements or modifications based on the above description, and all such improvements and modifications should fall within the protection scope of the appended claims.

Claims

1. A flexible display screen, characterized in that, include: Driving substrate, several light-emitting chips; The driving substrate includes a first substrate, a first driving circuit, and a second driving circuit. The first substrate includes alternately arranged rigid fixing parts and flexible telescopic parts, and the first substrate is capable of telescopic deformation. The light-emitting chip includes a first light-emitting chip disposed on a first surface of the first substrate and a second light-emitting chip disposed on a second surface of the first substrate, with the first surface and the second surface disposed opposite to each other; the first light-emitting chip and the second light-emitting chip are alternately disposed on the rigid fixing part; each first light-emitting chip is electrically connected to the first driving circuit and each second light-emitting chip is electrically connected to the second driving circuit. The light-emitting chip is a miniature LED chip; Before and after the stretching deformation, the distance between any two adjacent rigid fixing parts is equal, and the position of each second light-emitting chip is stably located in the middle position between two adjacent first light-emitting chips.

2. The flexible display screen as described in claim 1, characterized in that, Both the first driving circuit and the second driving circuit are disposed on the first substrate, with the first driving circuit located on the first surface and the second driving circuit located on the second surface.

3. The flexible display screen as claimed in claim 1, wherein the driving substrate further comprises a second substrate stacked on the first substrate, the first driving circuit is disposed on the first substrate, and the second driving circuit is disposed on the second substrate; the second substrate comprises alternately arranged rigid fixing portions and flexible telescopic portions, and the second substrate is configured to be able to telescopically deform synchronously with the first substrate; the position of the rigid fixing portion of the second substrate corresponds to the position of the rigid fixing portion of the first substrate, and the position of the flexible telescopic portion of the second substrate corresponds to the position of the flexible telescopic portion of the first substrate.

4. The flexible display screen as described in claim 3, characterized in that, The light-emitting end of the second light-emitting chip is fixed to the rigid fixing part of the first substrate, and the bonding end of the second light-emitting chip is fixed to the rigid fixing part of the second substrate. The light-emitting end and the bonding end are opposite to each other.

5. The flexible display screen as described in claim 4, characterized in that, The light-emitting end is fixed to the rigid fixing part of the first substrate by transparent adhesive.

6. The flexible display screen according to any one of claims 1-5, characterized in that, The flexible display screen further includes a reflective layer located on one side of the second surface of the first substrate. The reflective layer reflects the light emitted by the first light-emitting chip and the second light-emitting chip, so that the light is emitted from one side of the first surface of the first substrate.

7. A display device, characterized in that, The device includes a flexible display screen as described in any one of claims 1-6, and an electrical connection component, the electrical connection component including a connection circuit configured to be electrically connected to the first drive circuit and the second drive circuit in the stretched drive substrate.

8. The display device as claimed in claim 7, characterized in that, The electrical connection assembly further includes a first elastic element, the connection circuit being disposed on the first elastic element, and the first elastic element supporting extension and retraction in at least the stretching direction of the drive substrate.

9. The display device as claimed in claim 8, characterized in that, The electrical connection assembly further includes a second elastic element, which, after being compressed in the stretching direction, has its side facing the drive substrate flush with the side of the connection circuit facing the drive substrate.

10. The display device according to any one of claims 7-9, characterized in that, The display device further includes a rigid guide rail, which is arranged along the stretching direction of the driving substrate and is used to guide the stretching or contraction of the driving substrate.

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