Frame, display screen and electronic device

Abstract

A frame (10), a display screen (100) and an electronic device. The frame (10) is used for the display screen (100). The display screen (100) comprises a flexible printed circuit (30) used for mounting a display driver integrated circuit (40). The frame (10) is provided with a bottom plate portion (11) and a flange portion (12), wherein the flange portion (12) is formed at the edge of the bottom plate portion (11) and is located on one side of the bottom plate portion (11); and a chamfer (13) is provided on the outer side of a corner between the flange portion (12) and the bottom plate portion (11). The flexible printed circuit (30) is curved in an arc shape and has a tail end extending to the side of the bottom plate portion (11) opposite the flange portion (12). The chamfer (13) is used for providing clearance for a curved part of the flexible printed circuit (30). By means of providing, on the frame (10), the chamfer (13) capable of providing clearance for the flexible printed circuit (30), the part of the flexible printed circuit (30) that is curved in an arc shape can fit closely against the outer peripheral surface of the frame (10), without causing excessive internal stress of the flexible printed circuit (30); and when the frame (10) is applied to the display screen (100), it is ensured that the display screen (100) can achieve normal display while achieving the effect of a narrow black bezel.

Description

Frame, display screen and electronic device

[0001] The present application claims priority to the Chinese patent application No. 202421962480.5, filed on August 14, 2024, and entitled "Frame, display screen and electronic device", the entire content of which is incorporated herein by reference. TECHNICAL FIELD

[0002] The present application relates to the technical field of electronic devices, and more particularly, to a frame, a display screen and an electronic device. BACKGROUND

[0003] Liquid Crystal Display (LCD) has the advantages of low power consumption, low radiation, thin body and soft picture, and has become the mainstream display screen in the display technology field and is widely used in electronic devices such as smart phones, smart watches, tablet computers, notebook computers and televisions.

[0004] High screen-to-body ratio is a major selling point of electronic devices such as smart phones, and currently various manufacturers are competing to launch narrow black border solutions to achieve high screen-to-body ratio of mobile phone products. However, the current liquid crystal display cannot achieve the effect of extremely narrow black border, so that the screen-to-body ratio of the mobile phone cannot be further improved, especially the black border on the side with the flexible circuit board, which is relatively wide. If the extremely narrow black border effect is achieved on that side, the light source will be inclined upward, and the display screen will have a bright band, which will seriously affect the display effect. SUMMARY

[0005] The present application aims to provide a frame, a display screen and an electronic device. By setting a chamfer on the frame that can avoid the flexible circuit board, the part of the flexible circuit board that is bent into an arc shape can be close to the outer peripheral surface of the frame without causing excessive internal stress of the flexible circuit board. When the frame is applied to a liquid crystal display screen, the narrow black border effect can be achieved while ensuring that the display screen can display normally.

[0006] In a first aspect, the present application provides a frame for a display screen, the display screen comprising a flexible circuit board for mounting a display driving chip, characterized in that the frame has a bottom plate part and a turned-up edge part, the turned-up edge part is formed at the edge of the bottom plate part and located at one side of the bottom plate part, a chamfer is provided outside the corner between the turned-up edge part and the bottom plate part, the flexible circuit board is bent into an arc shape and the end thereof extends to the side of the bottom plate part opposite to the turned-up edge part, and the chamfer is used to avoid the bending part of the flexible circuit board.

[0007] The frame in the present application is provided with a chamfer capable of avoiding the flexible circuit board. When the frame is applied to the display screen, the curved part of the flexible circuit board is close to the outer circumferential surface of the frame. Since the chamfer can avoid the curved part of the flexible circuit board, it will not interfere with and block the flexible circuit board, so that the flexible circuit board can be naturally bent to avoid the internal stress of the flexible circuit board, so as to avoid the trend that the end of the flexible circuit board close to the thin film transistor drags the thin film transistor downward, so as to prevent the deformation of the thin film transistor from causing display abnormalities. In addition, the light source below the thin film transistor can also be prevented from being upwardly inclined in the light emitting angle, so as to ensure that the light emitted by the light source can be completely irradiated into the light guide plate, so as to avoid the problem that the light emitted by the light source directly hits the thin film transistor, thereby ensuring that the display screen can display normally. In addition, since the curved part of the flexible circuit board can be close to the outer circumferential surface of the frame, the width of the light-proof area on the cover plate can be reduced, so that the visual black border formed by the light-proof area is narrowed, thereby improving the screen-to-body ratio of the display screen. Overall, when the frame in the present application is applied to the display screen, the normal display of the display screen can be ensured while the effect of narrow black border is taken into account.

[0008] In a possible design, the chamfer includes a round chamfer or an inclined chamfer.

[0009] In a possible design, the frame is rectangular, and a portion of one side of the frame is recessed inward to form a groove, and the chamfer is located in the groove.

[0010] The side of the frame is provided with a groove, and when the flexible circuit board is bent to the back side of the frame, the curved part of the flexible circuit board can sink into the groove, so that the protruding amount of the flexible circuit board on the outer circumferential surface of the frame is small, thereby reducing the range to be blocked by the light-proof area, so as to further reduce the width of the light-proof area, thereby facilitating the realization of the effect of narrow black border of the screen.

[0011] In a possible design, the frame includes a metal plate and a plastic frame, the edge of the metal plate is bent to form a chamfer, the plastic frame is a frame structure with a hollow middle portion and is connected to the inner side of the metal plate, the bent part of the edge of the metal plate and the plastic frame jointly constitute a flange part, and the metal plate except the bent part constitutes a bottom plate part.

[0012] The frame is designed in the form of an assembly composed of the metal plate and the plastic frame, so that the structural strength of the frame can be improved, the weight of the frame can be reduced, and the frame also has good anti-static ability and heat dissipation performance.

[0013] In a possible design, in the height direction of the frame, the top of the plastic frame is higher than the bent part of the edge of the metal plate.

[0014] The plastic frame is connected with the thin film transistor, so that the edge of the metal plate is prevented from directly contacting the thin film transistor. In a smartphone drop scenario, the plastic frame can serve as a buffer to prevent the metal plate from impacting the thin film transistor, thereby ensuring the stability of the display screen.

[0015] In a possible design, the edge of the metal plate is coplanar with the plastic frame on the outer circumferential surface of the frame body.

[0016] The outer circumferential surface of the frame body is flat without protruding parts, so as to avoid supporting the bent part of the flexible circuit board, and facilitate the bent part of the flexible circuit board to be closer to the outer circumferential surface of the frame body, thereby further reducing the width of the opaque area of the cover plate and helping to achieve the narrow black border effect of the display screen.

[0017] In a possible design, the frame body satisfies the following relationship: W≥2.5t; H≥5t;

[0018] wherein W is the cross-sectional width of the plastic frame, H is the overall height of the frame body, and t is the thickness of the metal plate.

[0019] The strength of the frame body can be ensured while ensuring that the frame body is light and thin.

[0020] In a possible design, the inner side surface of the metal plate that is attached to the plastic frame is provided with a rubber gripping pattern.

[0021] The bonding strength of the metal plate and the plastic frame is further improved.

[0022] In a second aspect, the present application also provides a display screen comprising the frame body according to any one of the above.

[0023] The display screen in the present application comprises the frame body described above, which is provided with a chamfer capable of avoiding the flexible circuit board. When the bent part of the flexible circuit board is close to the outer circumferential surface of the frame body, the chamfer can avoid the bent part of the flexible circuit board and will not interfere with or block the flexible circuit board, so that the flexible circuit board can be naturally bent to avoid the internal stress of the flexible circuit board, thereby ensuring that the display screen can normally display while taking into account the narrow black border effect.

[0024] In a possible design, the display screen further comprises a flexible circuit board and a thin film transistor, one end of the flexible circuit board is connected with the thin film transistor, the other end of the flexible circuit board extends to one side of the bottom plate part of the frame body, and the thin film transistor covers the turned-up edge part of the frame body.

[0025] In a possible design, the display screen further comprises a light source and a light guide plate, the light source and the light guide plate are located inside the frame body, and the light source is located at the side of the light guide plate.

[0026] In a third aspect, the present application provides an electronic device comprising the display screen of any one of the above.

[0027] The electronic device in the present application can display normally while taking into account the effect of narrow black edges.

[0028] In a possible design, the electronic device further comprises a middle frame, and the display screen comprises a cover plate, which is in sealing connection with the periphery of the middle frame. BRIEF DESCRIPTION OF DRAWINGS

[0029] FIG. 1 is a partial cross-sectional view of a smartphone in the related art;

[0030] FIG. 2 is a schematic diagram of bending a flexible circuit board into an arc shape close to the outer peripheral surface of a frame body;

[0031] FIG. 3 is a schematic diagram of a smartphone according to an embodiment of the present application;

[0032] FIG. 4 is an exploded view of the smartphone in FIG. 3;

[0033] FIG. 5 is an exploded view of the smartphone in FIG. 3 from another perspective;

[0034] FIG. 6 is a partial enlarged view of the display screen in FIG. 5;

[0035] FIG. 7 is a schematic diagram of an example of a frame body according to an embodiment of the present application;

[0036] FIG. 8 is a cross-sectional view of the frame body according to an embodiment of the present application;

[0037] FIG. 9 is an enlarged view of an example at G in FIG. 8;

[0038] FIG. 10 is a cross-sectional view of an example at F-F in FIG. 3;

[0039] FIG. 11 is an enlarged view of another example at G in FIG. 8;

[0040] FIG. 12 is a cross-sectional view of another example at F-F in FIG. 3;

[0041] FIG. 13 is a schematic diagram of another example of a frame body according to an embodiment of the present application;

[0042] FIG. 14 is an exploded view of the frame body according to an embodiment of the present application;

[0043] FIG. 15 is a partial cross-sectional view of the frame body in FIG. 14;

[0044] FIG. 16 is an assembly diagram of a metal plate and a plastic frame in FIG. 15;

[0045] FIG. 17 is an assembly diagram of a metal plate and a plastic frame according to an embodiment of the present application;

[0046] FIG. 18 is an assembly view of another example of the metal plate and the plastic frame according to an embodiment of the present application;

[0047] FIG. 19 is a stress simulation schematic diagram of the flexible circuit board according to an embodiment of the present application when the flexible circuit board is bent on the frame body;

[0048] FIG. 20 is a stress simulation schematic diagram of the flexible circuit board according to the related art when the flexible circuit board is bent on the frame body.

[0049] FIG. 18 is an assembly view of another example of the metal plate and the plastic frame according to an embodiment of the present application; DETAILED DESCRIPTION

[0050] The following exemplary describes the related content that may be involved in the embodiments of the present application. Obviously, the described embodiments are only some of the embodiments of the present application, not all the embodiments.

[0051] In the description of the present application, it should be noted that unless otherwise explicitly specified and limited, the terms "mounting", "connection", "connecting" should be understood in a broad sense, for example, can be fixedly connected, can be detachably connected, or integrally connected; can be mechanically connected, can be electrically connected or can communicate with each other; can be directly connected, can be indirectly connected through an intermediate medium, can be the internal connection of two elements or the interaction relationship between two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0052] In the description of the present application, it should be understood that the terms "upper", "lower", "side", "inner", "outer", "top", "bottom" and the like indicate the orientation or positional relationship based on the installation, and are only used to facilitate the description of the present application and simplify the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation of the present application.

[0053] It should be noted that the same reference signs are used to indicate the same component or the same part in the embodiments of the present application, and for the same components in the embodiments of the present application, only one of the parts or components may be taken as an example and marked with a reference sign in the drawings, and it should be understood that the reference sign is also applicable to other same parts or components.

[0054] In the description of the present application, it should be noted that the term "and / or" is only a description of the association relationship of the associated objects, which means that there can be three relationships, for example, A and / or B can represent three cases of A alone, A and B together, and B alone.

[0055] Liquid Crystal Display (LCD) has the advantages of low power consumption, low radiation, thin body and soft picture, and has become the mainstream display screen in the display technology field and is widely used in electronic devices such as smart phones, smart watches, tablet computers, notebook computers and televisions.

[0056] FIG. 1 is a partial cross-sectional view of a smart phone in the related art, as shown in FIG. 1, a thin film transistor 70' (TFT) is provided in the liquid crystal display screen, since the thin film transistor 70' itself does not emit light, the liquid crystal display screen needs to provide backlight through a side-in light source 50'.

[0057] In addition to the thin film transistor 70' and the light source 50', the liquid crystal display screen further comprises a frame 10', a light guide plate 60', a display driver integrated circuit 40' and a flexible printed circuit 30', etc. Among them, the light guide plate 60' is used to scatter the light emitted by the light source 50', so that the point light emitted by the light source 50' can be uniformly irradiated to the thin film transistor 70' as planar light. The components such as the light guide plate 60' and the light source 50' are located inside the frame 10', and the frame 10' supports and protects the light guide plate 60' and the light source 50'. The flexible printed circuit 30' is used to connect the thin film transistor 70' and the display driver integrated circuit 40', so as to realize electrical interconnection between the thin film transistor 70' and the display driver integrated circuit 40'. The main function of the display driver integrated circuit 40' is to send driving signals and data to the thin film transistor 70' in the form of electrical signals, so that image information such as letters, pictures, etc. can be presented on the liquid crystal display screen. Among them, the display driver integrated circuit 40' is arranged on the side of the frame 10' opposite to the thin film transistor 70' through the flexible printed circuit 30'. This design enables the display driver integrated circuit 40' to be stacked with the frame 10', thereby reducing the number and size of components around the frame 10', which is conducive to the narrow black border design of the display screen.

[0058] High screen-to-body ratio is a big selling point of electronic devices such as smart phones. At present, various manufacturers are competing to launch narrow black border solutions to realize high screen-to-body ratio of mobile phone products. However, the current liquid crystal display screen cannot achieve the effect of extremely narrow black border, so that the screen-to-body ratio of the mobile phone cannot be further improved. In particular, the black border on the side of the display screen with the flexible printed circuit 30' is relatively wide. If the extremely narrow black border effect is realized on this side, the light emitting angle of the light source 50' will be upward, and the display screen will have a bright band, which will seriously affect the display effect. The specific reasons for this technical problem are analyzed as follows.

[0059] Continuing to refer to FIG. 1, the topmost part of the display screen is provided with a transparent cover plate 20'. In order to avoid the user seeing the halo and internal lines, and also to facilitate the installation of the cover plate 20', the outer periphery of the light transmission area 21' of the cover plate 20' is further provided with a ring of non-light transmission area 22'. The thin film transistor 70' displays pictures through the light transmission area 21', and the non-light transmission area 22' is bonded with the mounting step provided on the middle frame 200' through sealing glue, so as to realize the installation and fixation of the cover plate 20' and the middle frame 200', and also realize the waterproof sealing function of the display screen. The non-light transmission area 22' on the cover plate 20' is the black border seen by the user, and the width of the black border directly affects the screen-to-body ratio of the mobile phone.

[0060] In order to meet the waterproof level requirements of the smart phone and ensure the bonding strength of the cover plate 20' and the middle frame 200', a certain dispensing width is required between the mounting step on the middle frame 200' and the opaque area 22' of the cover plate 20', that is, the part with the width d1 on the opaque area 22' in FIG. 1. Therefore, if the narrow black border effect of the display screen is to be achieved, the part with the width d2 on the opaque area 22' can only be reduced.

[0061] As mentioned above, the opaque area 22' also has the important function of shielding internal circuits. As shown in FIG. 1, the part with the width d2 on the opaque area 22' can shield the flexible circuit board 30'. The flexible circuit board 30' is curved in an arc shape after being led out from the thin film transistor 70' and the end thereof extends to the back side of the frame 10'. The closer the curved part of the flexible circuit board 30' to the outer circumferential surface of the frame 10', the smaller the range of the flexible circuit board 30' to be shielded by the opaque area 22', that is, the smaller the width d2 of the opaque area 22'.

[0062] FIG. 2 is a schematic view in which the curved part of the flexible circuit board 30' is close to the outer circumferential surface of the frame 10'. As shown in FIG. 2, if the part with the width d2 on the opaque area 22' is to be reduced, the flexible circuit board 30' can be forcibly curved close to the outer circumferential surface of the frame 10'. However, this will cause excessive internal stress of the flexible circuit board 30', so that the end of the flexible circuit board 30' close to the thin film transistor 70' has a tendency to drag down the thin film transistor 70'. Thus, not only will the thin film transistor 70' be deformed to cause display abnormalities, but the deformed thin film transistor 70' will also cause the light emitting angle of the light source 50' installed below the thin film transistor 70' to be upward, so that the light emitted by the light source 50' cannot completely irradiate into the light guide plate 60', and the emitted light will directly shoot toward the thin film transistor 70', thereby causing a bright band problem on the display screen, which will seriously affect the display effect.

[0063] It can be seen that the current liquid crystal display screen cannot achieve the narrow black border effect while ensuring normal display.

[0064] Therefore, in order to solve the above technical problems, the present application provides a frame, a display screen and an electronic device. The frame is provided with a chamfer capable of avoiding the flexible circuit board, so that the curved part of the flexible circuit board can be close to the outer circumferential surface of the frame without causing excessive internal stress of the flexible circuit board. When the frame is applied to the liquid crystal display screen, the narrow black border effect can be achieved while ensuring normal display of the display screen.

[0065] The electronic device can also be referred to as a mobile device, a terminal device, a mobile terminal, or a terminal. The electronic device includes, but is not limited to, a handheld device, a vehicle-mounted device, a wearable device, a computing device, or other processing devices connected to a wireless modem. For example, the electronic device can include a smart watch, a smart phone, a palm computer, a tablet computer, a notebook computer, a television, and other electronic devices with a screen and requiring narrow black design.

[0066] To more conveniently describe the electronic device provided by the embodiments of the present application, as an example but not limitation, the technical solutions of the present application will be described in detail below with the electronic device being a smart phone as an example.

[0067] The smart phone provided by the embodiments of the present application will be described in detail below with reference to the accompanying drawings.

[0068] FIG. 3 is a schematic diagram of the smart phone provided by the embodiments of the present application. FIG. 4 is an exploded view of the smart phone in FIG. 3. FIG. 5 is an exploded view of the smart phone in FIG. 3 from another perspective.

[0069] As shown in FIGS. 3-5, the smart phone provided by the embodiments of the present application includes a display screen 100, a middle frame 200, and a back cover 300. The front end surface of the middle frame 200 is fixedly provided with the display screen 100, and the rear end surface of the middle frame 200 is fixedly provided with the back cover 300. The display screen 100, the middle frame 200, and the back cover 300 together define a containing space of the smart phone, which is used to install various functional elements of the smart phone, such as a camera module, a battery, a microphone, and other functional elements.

[0070] In addition, the smart phone can also include a processor, a universal serial bus (USB) interface, a charging management module, a power management module, a mobile communication module, an antenna, a wireless communication module, an audio module, an earphone interface, a sensor module, a key, and a subscriber identification module (SIM) card interface.

[0071] These functional elements can be changed according to user needs. It can be understood that the specific embodiments introduced above are only one specific implementation manner of the present application, and other manners that can implement the solutions of the present application are also within the scope of protection of the present application, which will not be described here.

[0072] To facilitate the description of each of the embodiments below, an XYZ coordinate system is established for the smart phone. Specifically, the length direction of the smart phone is defined as the X direction, the width direction of the smart phone is defined as the Y direction, and the height direction or the thickness direction of the smart phone is defined as the Z direction. The X direction, the Y direction, and the Z direction are perpendicular to each other.

[0073] The technical solution of the frame 10 of the smart phone in the embodiment of the present application will be described in detail below.

[0074] FIG. 6 is a partial enlarged view of the display screen 100 in FIG. 5. FIG. 7 is a schematic view of an example of the frame 10 provided in the embodiment of the present application. FIG. 8 is a sectional view of the frame 10 provided in the embodiment of the present application. FIG. 9 is an enlarged view of an example at G in FIG. 8. FIG. 10 is a sectional view of an example at F-F in FIG. 3.

[0075] As shown in FIG. 6, the frame 10 provided in the embodiment of the present application is used for the display screen 100, which includes the flexible circuit board 30 for mounting the display driving chip 40. As shown in FIGS. 7-10, the frame 10 has a bottom plate part 11 and a flange part 12, the flange part 12 is formed at the edge of the bottom plate part 11 and located at one side of the bottom plate part 11, a chamfer 13 is provided outside the corner of the flange part 12 and the bottom plate part 11, the flexible circuit board 30 is curved in an arc shape and the end thereof extends to the side of the bottom plate part 11 which is opposite to the flange part 12, and the chamfer 13 is used for avoiding the curved part of the flexible circuit board 30.

[0076] In addition, the display screen 100 further includes a cover plate 20, a thin film transistor 70, a light source 50, a light guide plate 60, etc. The thin film transistor 70 is covered on the flange part 12 of the frame 10. The light source 50 and the light guide plate 60 are located inside the frame 10, and the light source 50 is located at the side of the light guide plate 60. The cover plate 20 has a transparent light transmission area 21, and a ring of non-light transmission area 22 is further provided at the outer periphery of the light transmission area 21, the non-light transmission area 22 is sealingly connected with the periphery of the middle frame 200.

[0077] The frame 10 in the embodiment of the present application is provided with the chamfer 13 capable of avoiding the flexible circuit board 30. When the frame 10 is applied to the display screen 100, when the curved part of the flexible circuit board 30 is close to the outer circumferential surface of the frame 10, the chamfer 13 can avoid the curved part of the flexible circuit board 30, and will not interfere with and block the flexible circuit board 30, so that the flexible circuit board 30 can be naturally bent, to avoid the internal stress of the flexible circuit board 30, so that the end of the flexible circuit board 30 close to the thin film transistor 70 can avoid the trend of dragging the thin film transistor 70 downward, to prevent the deformation of the thin film transistor 70 from causing display abnormalities. In addition, the light emitting angle of the light source 50 below the thin film transistor 70 can be prevented from being raised, to ensure that the light emitted by the light source 50 can be fully irradiated into the light guide plate 60, to avoid the problem of the light emitted by the light source 50 directly shooting at the thin film transistor 70, thereby ensuring that the display screen 100 can display normally. In addition, since the curved part of the flexible circuit board 30 can be close to the outer circumferential surface of the frame 10, the width d2 of the light-proof area 22 on the cover plate 20 can be reduced, so that the visual black border formed by the light-proof area 22 is narrowed, thereby improving the screen-to-body ratio of the display screen 100. Overall, when the frame 10 in the embodiment of the present application is applied to the display screen 100, the normal display of the display screen 100 can be ensured while the effect of narrow black border is taken into account.

[0078] As shown in FIG. 10, the display screen 100 in the embodiment of the present application is further provided with the composite film 91 stacked above the light guide plate 60 in the frame 10, which is used to further diffuse the light emitted by the light guide plate 60; the light reflecting film 92 is stacked below the light guide plate 60, which is used to reflect the light emitted by the light guide plate 60 back to the light guide plate 60, to avoid the light from shooting in other directions except the thin film transistor 70, to improve the light energy utilization rate of the light source 50 and reduce the loss; the light filter 80 is further provided between the cover plate 20 and the thin film transistor 70, which is used to realize the color image of the display screen 100.

[0079] The folded edge part 12 of the frame 10 can be bonded with the thin film transistor 70, to realize the fixed installation of the frame 10.

[0080] The material of the cover plate 20 can be glass, acrylic (also known as organic glass), crystal or quartz stone, etc., or any other transparent hard material. The surface type of the cover plate 20 includes a curved surface or a flat surface, or a combination of curved and flat surfaces, that is, a 2.5D cover plate 20. The light-proof area 22 on the cover plate 20 can be formed on the cover plate 20 by a silk-screen process.

[0081] The light-proof area 22 of the cover plate 20 and the middle frame 200 can be fixed by adhesive bonding. The adhesive can be light-curing adhesive, such as ultraviolet (UV) curing adhesive, also known as shadowless adhesive or photosensitive adhesive, which refers to a kind of adhesive that must be cured by ultraviolet irradiation. The photoinitiator (or photosensitizer) in the UV curing adhesive absorbs ultraviolet light to produce active free radicals or cations under ultraviolet irradiation, initiates monomer polymerization, crosslinking and branch chemical reaction, and converts the adhesive from liquid to solid within a few seconds. The adhesive can also be heat-curing adhesive, such as polyurethane adhesive, which is a sealing adhesive cured by heat source, has good stability, no by-product generated after curing, and good bonding strength and sealing performance.

[0082] The cover plate 20, the filter 80, the thin film transistor 70, etc. can be bonded together in sequence by adhesive. The adhesive can be optically clear adhesive (OCA), which is a double-sided adhesive tape without base material, has colorless transparency, high light transmittance (full light transmittance > 99%), high adhesion, high temperature resistance, ultraviolet resistance, etc., and has a controlled thickness, can provide uniform spacing, and will not have yellowing, peeling and deterioration problems after long-term use.

[0083] As shown in FIG. 9, in an embodiment provided by the present application, the chamfer 13 provided on the frame 10 is a round chamfer.

[0084] FIG. 11 is an enlarged view of another example of G in FIG. 8. As shown in FIG. 11, in an embodiment provided by the present application, the chamfer 13 provided on the frame 10 is an inclined chamfer.

[0085] FIG. 12 is a cross-sectional view of another example of F-F in FIG. 3. As shown in FIG. 12, the portion of the flexible circuit board 30 bent into an arc shape can be close to the outer circumferential surface of the frame 10, and the inclined chamfer avoids the flexible circuit board 30, so that the flexible circuit board 30 can be naturally bent and will not cause excessive internal stress of the flexible circuit board 30.

[0086] Optionally, as shown in FIG. 7, the frame 10 can be rectangular, and the chamfer 13 is located in the middle region of one side of the frame 10. The length of the region of the side of the frame 10 where the chamfer 13 is provided corresponds to the width of the flexible circuit board 30.

[0087] FIG. 13 is a schematic view of another example of the frame 10 provided by an embodiment of the present application.

[0088] As shown in FIG. 13, in an embodiment provided by the present application, the frame 10 is rectangular, a portion of one side of the frame 10 is recessed inward to form a groove 14, and the chamfer 13 is located in the groove 14.

[0089] In this embodiment, the side of the frame body 10 is provided with a groove 14, when the flexible circuit board 30 is bent to the back side of the frame body 10, the bent part of the flexible circuit board 30 can sink into the groove 14, so that the protruding amount of the flexible circuit board 30 on the peripheral surface of the frame body 10 is small, thereby the range to be blocked by the light shielding area 22 is also smaller, so that the width d2 of the light shielding area 22 can be further reduced, thereby facilitating the realization of the narrow black border effect of the screen.

[0090] As mentioned above, the frame body 10 has various sheet or film structures such as the light guide plate 60, the composite film 91, the light reflecting film 92, etc. These sheet or film structures are generally thin and have small structural strength, and are easily deformed by external forces, which will cause the surface of the sheet or film structure to be uneven, thereby causing the display screen 100 to have ripples, light spots and other phenomena, affecting the display effect. In order to reduce the influence of external forces on the light guide plate 60, the composite film 91, the light reflecting film 92 and other components in the frame body 10, as shown in FIGS. 9 and 11, the frame body 10 can be integrally formed by a metal material through a casting process, or integrally formed by a metal plate through a stamping process or a laser etching process. In this case, the frame body 10 is entirely composed of a metal material. Since the frame body 10 made of a metal material has large structural strength, the stress condition of the display screen 100 can be improved. When there is an external force, the external force first acts on the metal frame body 10, and the deformation amount of the metal frame body 10 is small, thereby reducing the deformation of the film material inside the frame body 10 and ensuring the display effect of the display screen 100.

[0091] The frame body 10 can also be integrally formed by a plastic material through an injection molding process. In this case, the frame body 10 is entirely composed of a plastic material. Compared with the all-metal frame body 10, the all-plastic frame body 10 can reduce the weight of the frame body 10, thereby facilitating the realization of the light and thin design requirement of the smart phone.

[0092] The all-metal frame body 10 is heavy, which is not conducive to the realization of the light and thin design. Although the all-plastic frame body 10 is light in quality, its structural strength is not as good as that of the all-metal frame body 10. In order to balance the requirements of structural strength and light and thin design, the frame body 10 can be designed in the form of an assembly of two materials, as shown in the following embodiments.

[0093] FIG. 14 is an exploded view of the frame body 10 according to an embodiment of the present application. FIG. 15 is a partial cross-sectional view of the frame body 10 in FIG. 14. FIG. 16 is an assembly view of the metal plate 15 and the plastic frame 16 in FIG. 15.

[0094] As shown in FIGS. 14-16, in an embodiment provided by the present application, the frame body 10 comprises a metal plate 15 and a plastic frame 16. The edge of the metal plate 15 is bent to form a chamfer 13. The plastic frame 16 is a hollow frame structure in the middle and is connected to the inner side of the metal plate 15. The bent part of the edge of the metal plate 15 and the plastic frame 16 constitute the flange part 12, i.e. the part enclosed by the short dashed line in FIG. 16 is the flange part 12. The part of the metal plate 15 except the bent part constitutes the bottom plate part 11, i.e. the part enclosed by the long dashed line in FIG. 16 is the bottom plate part 11.

[0095] In the embodiment, the frame body 10 is designed as an assembly composed of the metal plate 15 and the plastic frame 16, which can improve the structural strength of the frame body 10, reduce the weight of the frame body 10, and also has good anti-static ability and heat dissipation performance. The specific reasons are as follows: the metal plate 15 is the outer part of the frame body 10 and has high impact strength. When external force acts, the external force first acts on the metal plate 15. Since the structural strength of the metal plate 15 is large and is not easy to deform, the influence on the components such as the reflective film 92 and the light guide plate 60 in the inside of the frame body 10 can be reduced, and the display effect of the display screen 100 can be ensured. The inside of the frame body 10 except the outermost metal plate 15 is the plastic frame 16, which can reduce the overall weight of the frame body 10 and also reduce the manufacturing cost of the frame body 10. At the same time, conductive tape can be pasted on the metal plate 15 and grounded, which can improve the anti-static ability of the frame body 10 and avoid the static interference of the main circuit board in the smart phone to the display screen 100. In addition, the metal material generally has good thermal conductivity, which can quickly conduct the heat emitted by the light source 50 out of the frame body 10, and can improve the working stability of the display screen 100.

[0096] The material of the metal plate 15 can be a single metal such as copper, aluminum, silver, gold, iron, lead, nickel, cobalt, tin, bismuth, palladium, platinum, or an alloy composed of multiple metals, or an alloy additionally containing non-metals such as carbon and silicon.

[0097] The material of the plastic frame 16 can be polyvinyl chloride (PVC), polypropylene (PP), polyethylene glycol terephthalate (PET), ethylene-vinyl acetate copolymer (EVA), polybutylene terephthalate (PBT), polycarbonate (PC), paraformaldehyde (POM), polyurethane (PU), and the like high molecular polymer.

[0098] In the molding of the frame body 10 in the embodiment, the frame body 10 can be manufactured by insert molding process. The insert molding process is a molding method in which the insert is installed in the cavity in the open state of the mold, and then the mold is closed for injection molding. Specifically, in the manufacturing of the frame body 10 in the embodiment, the metal plate 15 is inserted into the molding mold of the frame body 10, and then the molten liquid plastic is injected. After the plastic in the mold is cooled and solidified, it is tightly bonded with the metal plate 15, thereby manufacturing the frame body 10 product composed of the metal plate 15 and the plastic frame 16.

[0099] In order to further improve the bonding strength of the metal plate 15 and the plastic frame 16, in an embodiment provided by the present application, the inner side surface of the metal plate 15 abutting the plastic frame 16 is provided with a glue grabbing pattern.

[0100] In the embodiment, the glue grabbing pattern provided on the metal plate 15 can increase the connection area of the metal plate 15 and the plastic frame 16, and further improve the bonding stability of the plastic frame 16 on the metal plate 15. The glue grabbing pattern can be a structure of micro-protrusions, micro-holes, corrugations, or the like arranged in an array. The glue grabbing pattern can be machined on the metal plate 15 by a numerical control machine tool to obtain the glue grabbing pattern on the surface of the metal plate 15.

[0101] As shown in FIG. 16, in an embodiment provided by the present application, the top of the plastic frame 16 is higher than the edge bending part of the metal plate 15 in the height direction of the frame body 10, i.e., the Z direction in FIG. 16.

[0102] In the embodiment, the top of the plastic frame 16 is higher than the edge bending part of the metal plate 15, so that the plastic frame 16 is connected with the thin film transistor 70, and the edge of the metal plate 15 is prevented from directly contacting the thin film transistor 70. In the smart phone drop scenario, the plastic frame 16 can play a buffering role, and can prevent the metal plate 15 from impacting the thin film transistor 70, so as to ensure the stability of the display screen 100.

[0103] As shown in FIG. 16, in an embodiment provided by the present application, the edge-bent part of the metal plate 15 is coplanar with the plastic frame 16 on the outer circumferential surface of the frame body 10, i.e. the surface indicated by the arrow S in FIG. 16.

[0104] In the embodiment, the edge-bent part of the metal plate 15 is coplanar with the plastic frame 16, so that the outer circumferential surface of the frame body 10 is flat without protruding part, thereby avoiding supporting the bent part of the flexible circuit board 30, and facilitating the bent part of the flexible circuit board 30 to be closer to the outer circumferential surface of the frame body 10, so as to further reduce the width of the opaque area 22 of the cover plate 20, and help to achieve the narrow black border effect of the display screen 100.

[0105] FIG. 17 is an assembly view of the metal plate 15 and the plastic frame 16 provided by the embodiment of the present application. The shape and structure of the metal plate 15 and the plastic frame 16 in FIG. 17 are consistent with those in FIG. 16. FIG. 17 is additionally added to facilitate dimension labeling, so as to avoid drawing too many auxiliary lines in the same figure, and also facilitate understanding.

[0106] As shown in FIG. 17, in an embodiment provided by the present application, the frame body 10 satisfies the following relationship:

[0107] W≥2.5t; H≥5t.

[0108] Wherein, W is the cross-sectional width of the plastic frame 16, H is the overall height of the frame body 10, and t is the thickness of the metal plate 15.

[0109] As mentioned above, the frame body 10 is designed in the form of an assembly composed of the metal plate 15 and the plastic frame 16, which can improve the structural strength of the frame body 10 and also reduce the weight of the frame body 10. The thickness t of the metal plate 15 is directly related to the strength and weight of the frame body 10. The greater the thickness t of the metal plate 15, the greater the strength of the frame body 10, but the weight of the frame body 10 will also be greater, which is not conducive to the realization of light and thin design. Therefore, in order to balance the relationship between the strength and weight of the frame body 10, the embodiment further limits the relationship between the overall height H of the frame body 10, the cross-sectional width W of the plastic frame 16 and the thickness t of the metal plate 15, so as to ensure the strength of the frame body 10 on the premise of ensuring the lightness and thinness of the frame body 10.

[0110] As shown in FIG. 17, the cross-sectional width value W of the plastic frame 16 can also be understood as the length value A of the chamfer 13 plus the length value B from the inner side of the plastic frame 16 to the chamfer 13 in the X direction, i.e. W=A+B. The overall height value H of the frame body 10 can also be understood as the length value C of the chamfer 13 plus the length value D from the edge of the metal plate 15 to the chamfer 13 plus the length value E from the edge of the metal plate 15 to the top of the plastic frame 16 in the Z direction, i.e. H=C+D+E.

[0111] The chamfer 13 shown in FIG. 17 is a round chamfer. When the chamfer 13 is an inclined chamfer, the above relationship can also be established, as follows.

[0112] FIG. 18 is an assembly view of another example of the metal plate 15 and the plastic frame 16 according to an embodiment of the present application.

[0113] As shown in FIG. 18, when the chamfer 13 is an inclined chamfer, the cross-sectional width value W of the plastic frame 16 is A+B, and the overall height value H of the frame body 10 is C+D+E.

[0114] FIG. 19 is a stress simulation schematic diagram of the flexible circuit board 30 in the embodiment of the present application when bent on the frame body 10. FIG. 20 is a stress simulation schematic diagram of a flexible circuit board 30' in the related art when bent on a frame body 10'.

[0115] As shown in FIG. 19, when the flexible circuit board 30 is bent into an arc-shaped portion K close to the outer circumferential surface of the frame body 10, since the chamfer 13 of the frame body 10 can avoid the bent portion K of the flexible circuit board 30 and does not interfere with or block the flexible circuit board 30, the flexible circuit board 30 can be naturally bent, and the internal stress of the bent portion K of the flexible circuit board 30 is 231.3 MPa.

[0116] As shown in FIG. 20, the frame body 10' in the related art does not have a chamfer. If the flexible circuit board 30' is forcibly bent into an arc-shaped portion K' close to the outer circumferential surface of the frame body 10', the internal stress of the bent portion K' of the flexible circuit board 30' will be relatively large, about 286.4 MPa.

[0117] It can be seen that, compared with the frame body 10' in the related art, when the flexible circuit board 30 is bent into an arc-shaped portion K close to the outer circumferential surface of the frame body 10, the internal stress of the bent portion K can be reduced by about 20%, and the specific calculation process is: (286.4-231.3) / 286.4=19.24%. Therefore, the tendency of the flexible circuit board 30 to pull down the thin-film transistor 70 at one end close to the thin-film transistor 70 can be avoided, so as to prevent the thin-film transistor 70 from being deformed to cause display abnormalities.

[0118] Finally, it should be noted that the above description is merely a specific implementation of the present application, but the protection scope of the present application is not limited thereto. Any changes or replacements within the technical scope disclosed in the present application should be covered in the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the protection scope of the claims.

Claims

1. A frame for a display screen (100) comprising a flexible circuit board (30) for mounting a display driver chip (40), characterized in that, The frame body (10) has a bottom plate part (11) and a flange part (12) formed at the edge of the bottom plate part (11) and located at one side of the bottom plate part (11), and a chamfer (13) is arranged outside the corner of the flange part (12) and the bottom plate part (11), the flexible circuit board (30) is in an arc bending shape and extends to the side of the bottom plate part (11) opposite to the flange part (12), and the chamfer (13) is used for avoiding the bending part of the flexible circuit board (30).

2. The housing according to claim 1, wherein The chamfer (13) comprises a round chamfer or an inclined chamfer.

3. The housing according to claim 1, wherein The frame body (10) is in a rectangular shape, a local part of one side of the frame body (10) is recessed inward to form a groove (14), and the chamfer (13) is located in the groove (14).

4. The housing according to claim 1, wherein The frame body (10) comprises a metal plate (15) and a plastic frame (16), the edge of the metal plate (15) is bent to form the chamfer (13), the plastic frame (16) is a frame structure with a hollow middle part and is connected to the inner side of the metal plate (15), and the bent part of the metal plate (15) and the plastic frame (16) jointly constitute the flange part (12), and the metal plate (15) except the bent part constitutes the bottom plate part (11).

5. The housing according to claim 4, wherein In the height direction of the frame body (10), the top of the plastic frame (16) is higher than the bent part of the edge of the metal plate (15).

6. The housing according to claim 5, wherein On the outer peripheral surface of the frame body (10), the bent part of the edge of the metal plate (15) is coplanar with the plastic frame (16).

7. The housing according to claim 6, wherein The frame body (10) satisfies the following relationship: W≥2.5t; H≥5t; Wherein, W is the cross-sectional width of the plastic frame (16), H is the overall height of the frame body (10), and t is the thickness of the metal plate (15).

8. The housing according to any one of claims 4 to 7, characterized in that The inner side surface of the metal plate (15) and the plastic frame (16) is provided with a glue catching pattern.

9. A display screen, characterized by The frame body (10) comprises the frame body (10) according to any one of claims 1-8.

10. The display screen of claim 9, wherein, Further comprising a flexible circuit board (30) and a thin film transistor (70), one end of the flexible circuit board (30) is connected to the thin film transistor (70), the other end of the flexible circuit board (30) extends to one side of the bottom plate part (11) of the frame body (10), and the thin film transistor (70) covers the flange part (12) of the frame body (10).

11. The display screen of claim 10, wherein, Further comprising a light source (50) and a light guide plate (60), the light source (50) and the light guide plate (60) are located inside the frame body (10), and the light source (50) is located at the side of the light guide plate (60).

12. An electronic device, comprising: The display screen (100) comprises the display screen (100) according to any one of claims 9-11.

13. The electronic device of claim 12, wherein, Further comprising a middle frame (200), and the display screen (100) comprises a cover plate (20) which is sealingly connected to the periphery of the middle frame (200).

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