Frame body, display screen and electronic equipment

Abstract

The utility model discloses a frame body, a display screen and electronic equipment, the frame body is used for the display screen, the display screen comprises a flexible circuit board used for installing a display driving chip, the frame body is provided with a bottom plate part and a flanging part, the flanging part is formed on the edge of the bottom plate part and located on one side of the bottom plate part, and chamfers are arranged on the outer sides of the corners of the flanging part and the bottom plate part. The flexible circuit board is bent in an arc shape, the tail end of the flexible circuit board extends to the side, back to the flanging part, of the bottom plate part, and the chamfer is used for avoiding the bent part of the flexible circuit board. According to the frame body, the chamfer capable of avoiding the flexible circuit board is arranged on the frame body, so that the part, bent into the arc shape, of the flexible circuit board can be attached to the peripheral surface of the frame body, and the internal stress of the flexible circuit board cannot be too large. When the frame body is applied to the liquid crystal display screen, the effect of a narrow black edge can be taken into account while normal display of the display screen is ensured.

Description

Technical Field

[0001] This application relates to the technical field of electronic devices, and more specifically, to a frame, a display screen, and an electronic device. Background Art

[0002] Liquid Crystal Display (LCD) has advantages such as low power consumption, low radiation, thin body, and soft picture, and it has become the mainstream display screen in the display technology field and is widely used in electronic devices such as smartphones, smart watches, tablet computers, laptop computers, and televisions.

[0003] A high screen-to-body ratio is a major selling point of electronic devices such as smartphones. Currently, each manufacturer is competing to launch narrow black border solutions to achieve high screen-to-body ratio mobile phone products. However, the current liquid crystal display screen cannot achieve the effect of an extremely narrow black border, which makes it impossible to further increase the screen-to-body ratio of mobile phones. Especially for the black border on the side with a flexible circuit board, its width is relatively large. If an extremely narrow black border effect is to be achieved on this side, it will cause the light-emitting angle of the light source to tilt upwards, and then there will be a problem of bright bands on the display screen, which will seriously affect the display effect. Summary of the Utility Model

[0004] The purpose of this application is to provide a frame, a display screen, and an electronic device. By providing a chamfer on the frame that can avoid the flexible circuit board, the curved part of the flexible circuit board can be bent into an arc shape and can be close to the outer peripheral surface of the frame without causing excessive internal stress on the flexible circuit board. When this frame is applied to a liquid crystal display screen, the effect of a narrow black border can be taken into account while ensuring the normal display of the display screen.

[0005] In a first aspect, this application provides a frame for a display screen. The display screen includes a flexible circuit board for installing a display driver chip. The frame is characterized in that it has a bottom plate part and a flanging part. The flanging part is formed at the edge of the bottom plate part and is located on one side of the bottom plate part. A chamfer is provided on the outer side of the corner between the flanging part and the bottom plate part. The flexible circuit board is bent in an arc shape and its end extends to the side of the bottom plate part opposite to the flanging part. The chamfer is used to avoid the bent part of the flexible circuit board.

[0006] In the housing of the present application, by providing chamfers on the housing that can avoid the flexible circuit board, when the housing is applied to a display screen and the bent part of the flexible circuit board in an arc shape is close to the outer peripheral surface of the housing, since the chamfers can avoid the bent part of the flexible circuit board, there will be no interference or blockage to the flexible circuit board. Therefore, the flexible circuit board can be bent naturally to avoid the accumulation of stress inside the flexible circuit board, thereby preventing the end of the flexible circuit board near the thin film transistor from having a tendency to drag the thin film transistor downward, and preventing the deformation of the thin film transistor from causing abnormal display. In addition, it can also prevent the light-emitting angle of the light source below the thin film transistor from tilting upward, ensuring that the emitted light of the light source can be completely irradiated into the light guide plate, and avoiding the bright band problem caused by the emitted light of the light source directly hitting the thin film transistor, thereby ensuring the normal display of the display screen. Additionally, since the bent part of the flexible circuit board in an arc shape can be close to the outer peripheral surface of the housing, the width of the light-blocking area on the cover plate can be reduced, making the visual black edge formed by the light-blocking area narrower, thereby improving the screen-to-body ratio of the display screen. Generally speaking, when the housing of the present application is applied to a display screen, while ensuring the normal display of the display screen, the effect of a narrow black edge can be taken into account.

[0007] In a possible design, the chamfer includes a round chamfer or an inclined chamfer.

[0008] In a possible design, the housing is rectangular, and a part of one side of the housing is recessed inward to form a groove, and the chamfer is located in the groove.

[0009] A groove is provided on the side of the housing. When the flexible circuit board bends towards the back side of the housing, the bent part of the flexible circuit board can sink into this groove, making the protruding amount of the flexible circuit board on the outer peripheral surface of the housing smaller. Thus, the range to be blocked by the light-blocking area is also smaller, and further reducing the width of the light-blocking area is beneficial to achieving the effect of a narrow black edge on the screen.

[0010] In a possible design, the housing 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 and is connected to the inner side of the metal plate. The bent part of the metal plate edge and the plastic frame together form a flanging part, and the part of the metal plate excluding the bent part forms a bottom plate part.

[0011] Designing the housing as a component form composed of a metal plate and a plastic frame can improve the structural strength of the housing, reduce the weight of the housing, and also have good antistatic ability and heat dissipation performance.

[0012] In a possible design, in the height direction of the housing, the top of the plastic frame is higher than the bent part of the metal plate edge.

[0013] The plastic frame is connected to the thin-film transistor to prevent the edge of the metal plate from directly contacting the thin-film transistor. In the scenario where the smartphone drops, the plastic frame can play a buffering role, preventing the metal plate from impacting the thin-film transistor to ensure the stability of the display screen.

[0014] In a possible design, on the outer peripheral surface of the frame body, the bent part of the edge of the metal plate is coplanar with the plastic frame.

[0015] This makes the outer peripheral surface of the frame body flat without protruding parts, avoiding forming a support for the bent part of the flexible circuit board, which is beneficial for making the bent part of the flexible circuit board closer to the outer peripheral surface of the frame body, thereby further reducing the width of the light-blocking area of the cover plate and contributing to achieving the narrow black edge effect of the display screen.

[0016] In a possible design, the frame body satisfies the following relationship:

[0017] W≥2.5t;

[0018] H≥5t;

[0019] 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.

[0020] On the premise of ensuring the thinness and lightness of the frame body, the strength of the frame body can be ensured.

[0021] In a possible design, the inner side surface of the metal plate that fits with the plastic frame is provided with glue-grabbing patterns.

[0022] This further improves the bonding strength between the metal plate and the plastic frame.

[0023] In a second aspect, the present application also provides a display screen, including the frame body of any one of the above.

[0024] The display screen in the present application includes the above-mentioned frame body. The frame body is provided with a chamfer that can avoid the flexible circuit board. When the part of the flexible circuit board bent into an arc is close to the outer peripheral surface of the frame body, since the chamfer can avoid the bent part of the flexible circuit board and will not interfere with or block the flexible circuit board, the flexible circuit board can be bent naturally to avoid the internal stress accumulation of the flexible circuit board. While ensuring the normal display of the display screen, the narrow black edge effect can be taken into account.

[0025] In a possible design, the display screen further includes a flexible circuit board and a thin-film transistor. One end of the flexible circuit board is connected to the thin-film transistor, and 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 flanging part of the frame body.

[0026] In a possible design, the display screen further includes 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 on the side of the light guide plate.

[0027] In a third aspect, the present application further provides an electronic device, including the display screen of any one of the above.

[0028] In the electronic device of the present application, its display screen can achieve the effect of a narrow black border while being able to display normally.

[0029] In a possible design, the electronic device further includes a middle frame. The display screen includes a cover plate, and the cover plate is hermetically connected to the periphery of the middle frame. Description of the Drawings

[0030] Figure 1 is a partial cross-sectional view of a smart phone in the related art;

[0031] Figure 2 is a schematic diagram of bending a flexible circuit board into an arc and attaching a part thereof to the outer peripheral surface of the frame body;

[0032] Figure 3 is a schematic diagram of a smart phone provided by an embodiment of the present application;

[0033] Figure 4 is Figure 3 an exploded view of the smart phone in

[0034] Figure 5 is Figure 3 an exploded view of the smart phone from another perspective in

[0035] Figure 6 is Figure 5 a partially enlarged view of the display screen in

[0036] Figure 7 is a schematic diagram of an example of the frame body provided by an embodiment of the present application;

[0037] Figure 8 is a cross-sectional view of the frame body provided by an embodiment of the present application;

[0038] Figure 9 is Figure 8 an enlarged view of an example at G in

[0039] Figure 10 is Figure 3 a cross-sectional view of an example at F-F in

[0040] Figure 11 is Figure 8 an enlarged view of another example at G in

[0041] Figure 12 is Figure 3Cross-sectional view of another example of F-F in the middle;

[0042] Figure 13 Schematic diagram of another example of the housing provided by the embodiment of the present application;

[0043] Figure 14 Exploded view of the housing provided by the embodiment of the present application;

[0044] Figure 15 Is Figure 14 Partial cross-sectional view of the housing in

[0045] Figure 16 Is Figure 15 Assembly drawing of the metal plate and the plastic frame in

[0046] Figure 17 Assembly drawing of the metal plate and the plastic frame provided by the embodiment of the present application;

[0047] Figure 18 Assembly drawing of another example of the metal plate and the plastic frame provided by the embodiment of the present application;

[0048] Figure 19 Schematic diagram of stress simulation when the flexible circuit board is bent on the housing in the embodiment of the present application;

[0049] Figure 20 Schematic diagram of stress simulation when the flexible circuit board in the related art is bent on the housing.

[0050] Reference numerals:

[0051] 10. Housing; 11. Bottom plate part; 12. Flanging part; 13. Chamfer; 14. Groove; 15. Metal plate; 16. Plastic frame;

[0052] 20. Cover plate; 21. Translucent area; 22. Opaque area; 30. Flexible circuit board; 40. Display driving chip; 50. Light source; 60. Light guide plate; 70. Thin film transistor; 80. Filter; 91. Composite film; 92. Reflective film;

[0053] 100. Display screen; 200. Middle frame; 300. Rear cover;

[0054] 10'. Housing; 20'. Cover plate; 21'. Translucent area; 22'. Opaque area; 30'. Flexible circuit board; 40'. Display driving chip; 50'. Light source; 60'. Light guide plate; 70'. Thin film transistor; 200'. Middle frame. Detailed implementation manners

[0055] The following is an exemplary introduction to the relevant content that the embodiments of the present application may involve. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments.

[0056] In the description of the present application, it should be noted that unless otherwise clearly specified and defined, the terms "installation", "connection", and "coupling" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection, an electrical connection, or a connection that allows mutual communication; it can be a direct connection, or an indirect connection through an intermediate medium, and can be the communication inside two components or the interaction relationship between two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to specific circumstances.

[0057] In the description of the present application, it should be understood that the orientation or positional relationship indicated by the terms "upper", "lower", "side", "inner", "outer", "top", "bottom", etc. is based on the orientation or positional relationship of installation, and is only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or component referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present application.

[0058] It should also be noted that in the embodiments of the present application, the same reference numerals are used to represent the same components or the same parts. For the same parts in the embodiments of the present application, only one of the parts or components may be marked with a reference numeral in the figure. It should be understood that for other identical parts or components, the reference numerals are equally applicable.

[0059] 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 associated objects, indicating that there can be three relationships. For example, A and / or B can represent: A exists alone, A and B exist simultaneously, and B exists alone.

[0060] A liquid crystal display (LCD) has the advantages of low power consumption, low radiation, a thin body, and a soft picture, etc. It 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, laptop computers, and televisions.

[0061] Figure 1 is a partial cross-sectional view of a smart phone in the related art, as Figure 1 shown, a thin film transistor 70' (Thin Film Transistor, TFT) is provided inside the liquid crystal display. Since the thin film transistor 70' itself does not emit light, the liquid crystal display needs to provide backlight through a side-entry light source 50'.

[0062] In addition to the thin film transistor 70' and the light source 50', the liquid crystal display screen also includes a frame 10', a light guide plate 60' (Light Guide Plate, LGP), a display driver chip 40' (Display Driver Integrated Circuit, DDIC), a flexible printed circuit board 30' (Flexible Printed Circuit, FPC), 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 evenly irradiated onto the thin film transistor 70' as planar light. 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 board 30' is used to connect the thin film transistor 70' and the display driver chip 40', thereby realizing electrical interconnection between the thin film transistor 70' and the display driver chip 40'. The main function of the display driver chip 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 and pictures can be presented on the liquid crystal display screen. Among them, the display driver chip 40' is arranged on the side of the frame 10' facing away from the thin film transistor 70' through the flexible printed circuit board 30'. This design enables the display driver chip 40' to be stacked with the frame 10', thereby reducing the number and size of components around the frame 10', which is beneficial for the narrow black border design of the display screen.

[0063] A high screen-to-body ratio is a major selling point of electronic devices such as smartphones. Currently, various manufacturers are competing to launch narrow black border solutions to achieve high screen-to-body ratio mobile phone products. However, the current liquid crystal display screens cannot achieve the effect of an extremely narrow black border, which makes it impossible to further increase the screen-to-body ratio of mobile phones. Especially for the black border on the side of the display screen with the flexible printed circuit board 30', its width is relatively large. If an extremely narrow black border effect is to be achieved on this side, it will cause the light-emitting angle of the light source 50' to tilt upward, and then there will be a problem of bright bands on the display screen, which will seriously affect the display effect. The specific reasons for this technical problem are analyzed as follows.

[0064] Continue to refer to Figure 1 , a transparent cover plate 20' is provided at the top of the display screen. In order to prevent users from seeing halos and internal circuits, and at the same time for the convenience of installing the cover plate 20', an opaque area 22' is provided around the outer periphery of the light-transmitting area 21' of the cover plate 20'. The thin film transistor 70' displays the picture through the light-transmitting area 21', and the opaque area 22' is bonded to the installation step provided on the middle frame 200' through a sealant to achieve the installation and fixation of the cover plate 20' and the middle frame 200', and at the same time achieve the waterproof and sealing function of the display screen. The opaque area 22' on the cover plate 20' is the black border seen by users, and the width of this black border directly affects the screen-to-body ratio of the mobile phone.

[0065] To meet the waterproof rating requirements of the smartphone and ensure the bonding strength between the cover plate 20' and the middle frame 200', there needs to be a certain width of glue dispensing between the mounting step on the middle frame 200' and the light-blocking area 22' of the cover plate 20', that is Figure 1 the part with width d1 on the light-blocking area 22' in

[0066] As mentioned above, another important function of the light-blocking area 22' is to block the internal circuit. In Figure 1 it can be seen that the part with width d2 on the light-blocking area 22 can block the flexible circuit board 30'. After being led out by the thin film transistor 70', the flexible circuit board 30' is curved in an arc shape, and the end extends to the back side of the frame body 10'. Among them, the closer the curved part of the flexible circuit board 30' is to the outer peripheral surface of the frame body 10', the smaller the range of the flexible circuit board 30' that the light-blocking area 22' needs to block, that is, the smaller the width d2 of the light-blocking area 22.

[0067] Figure 2 is a schematic diagram of the part where the flexible circuit board 30' is curved in an arc shape close to the outer peripheral surface of the frame body 10'. As shown in Figure 2 If, in order to reduce the part with width d2 on the light-blocking area 22', the flexible circuit board 30' is forced to be bent close to the outer peripheral surface of the frame body 10', but this will cause excessive internal stress in the flexible circuit board 30', making one end of the flexible circuit board 30' close to the thin film transistor 70' tend to drag down the thin film transistor 70'. As a result, not only will the thin film transistor 70' be deformed and cause abnormal display, but the deformed thin film transistor 70' will also cause the light-emitting angle of the light source 50' installed below it to tilt upward. Furthermore, the emitted light of the light source 50' cannot be completely irradiated into the light guide plate 60', and the emitted light will directly shine on the thin film transistor 70'. As a result, there will be a bright band problem on the display screen, which will seriously affect the display effect.

[0068] It can be seen that the current liquid crystal display screen cannot achieve the effect of a narrow black edge while ensuring normal display.

[0069] In view of this, to solve the above technical problems, the present application provides a frame body, a display screen and an electronic device. By setting a chamfer on the frame body that can avoid the flexible circuit board, the part where the flexible circuit board is curved in an arc shape can be close to the outer peripheral surface of the frame body without causing excessive internal stress in the flexible circuit board. When this frame body is applied to a liquid crystal display screen, the effect of a narrow black edge can be achieved while ensuring normal display.

[0070] Embodiments of the present application first provide an electronic device, which may 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 may include a smart watch, a smart phone, a personal digital assistant (PDA), a tablet computer, a laptop computer, a television, and other electronic devices with a screen that require a narrow black border design.

[0071] To more conveniently elaborate on the electronic device provided by the embodiments of the present application, by way of example rather than limitation, the following will take the electronic device as a smart phone to elaborate on the technical solution of the present application in detail.

[0072] Now, the smart phone provided by the embodiments of the present application will be described in detail with reference to the accompanying drawings.

[0073] Figure 3 is a schematic diagram of the smart phone provided by the embodiments of the present application. Figure 4 is Figure 3 an exploded view of the smart phone in Figure 5 is Figure 3 another exploded view of the smart phone in

[0074] As Figures 3 - 5 shown, the smart phone provided by the embodiments of the present application includes a display screen 100, a middle frame 200, and a rear cover 300. The front end face of the middle frame 200 is fixedly provided with the display screen 100, and the rear end face of the middle frame 200 is fixedly provided with the rear cover 300. The display screen 100, the middle frame 200, and the rear cover 300 jointly define the accommodation space of the smart phone, and this accommodation space is used to install various functional components of the smart phone, such as a camera module, a battery, a microphone, and other functional components.

[0075] In addition, the smart phone may further 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, a headphone interface, a sensor module, a button, and a subscriber identification module (SIM) card interface and other functional components.

[0076] These functional components can be changed according to the needs of the user. It can be understood that the specific embodiments described above are only a specific implementation manner of the present application, and other ways that can implement the solution of the present application are also within the scope of protection of the present application, which will not be elaborated here.

[0077] For the convenience of describing the following embodiments, an XYZ coordinate system is established for a 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 thickness direction of the smart phone is defined as the Z direction. The X direction, Y direction, and Z direction are perpendicular to each other in pairs.

[0078] The following details the technical solution of the housing 10 of the smart phone in the embodiments of the present application.

[0079] Figure 6 is Figure 5 a partial enlarged view of the display screen 100 in Figure 7 is a schematic diagram of an example of the housing 10 provided in the embodiments of the present application. Figure 8 is a cross-sectional view of the housing 10 provided in the embodiments of the present application. Figure 9 is Figure 8 an enlarged view of an example at position G in Figure 10 is Figure 3 a cross-sectional view of an example along F-F in

[0080] As Figure 6 shown, the housing 10 provided in the embodiments of the present application is for the display screen 100, and the display screen 100 includes a flexible circuit board 30 for mounting a display driving chip 40. As Figures 7 - 10 shown, the housing 10 has a bottom plate portion 11 and a flanging portion 12. The flanging portion 12 is formed at the edge of the bottom plate portion 11 and on one side of the bottom plate portion 11. A chamfer 13 is provided on the outer side of the corner between the flanging portion 12 and the bottom plate portion 11. The flexible circuit board 30 is curved in an arc shape and the end extends to the side of the bottom plate portion 11 opposite to the flanging portion 12. The chamfer 13 is used to avoid the bent portion of the flexible circuit board 30.

[0081] In addition, the display screen 100 further includes a cover plate 20, thin film transistors 70, a light source 50, a light guide plate 60, etc. The thin film transistors 70 cover the flanging portion 12 of the housing 10. The light source 50 and the light guide plate 60 are located inside the housing 10, and the light source 50 is located on the side of the light guide plate 60. The cover plate 20 has a transparent light-transmitting area 21, and an opaque area 22 is provided around the outer periphery of the light-transmitting area 21. The opaque area 22 is hermetically connected to the periphery of the middle frame 200.

[0082] In the frame 10 of the embodiment of the present application, by providing a chamfer 13 on the frame 10 that can avoid the flexible circuit board 30, when the frame 10 is applied to the display screen 100, when the bent part of the flexible circuit board 30 is bent into an arc and is close to the outer peripheral surface of the frame 10, since the chamfer 13 can avoid the bent part of the flexible circuit board 30, it will not interfere with or block the flexible circuit board 30. Therefore, the flexible circuit board 30 can be bent naturally to avoid the accumulation of stress inside the flexible circuit board 30, thereby avoiding the tendency of one end of the flexible circuit board 30 close to the thin film transistor 70 to drag down the thin film transistor 70, so as to prevent the deformation of the thin film transistor 70 from causing abnormal display. In addition, it can also prevent the light-emitting angle of the light source 50 below the thin film transistor 70 from tilting upward, ensuring that the emitted light of the light source 50 can be completely irradiated into the light guide plate 60, and avoiding the bright band problem caused by the emitted light of the light source 50 directly hitting the thin film transistor 70, thereby ensuring that the display screen 100 can display normally. In addition, since the bent part of the flexible circuit board 30 bent into an arc can be close to the outer peripheral surface of the frame 10, the width d2 of the light-tight area 22 on the cover plate 20 can be reduced, making the visual black edge formed by the light-tight area 22 narrower, thereby improving the screen-to-body ratio of the display screen 100. Generally speaking, when the frame 10 in the embodiment of the present application is applied to the display screen 100, while ensuring that the display screen 100 can display normally, the effect of a narrow black edge can be taken into account.

[0083] For another example Figure 10 As shown, in the display screen 100 of the embodiment of the present application, inside the frame 10, a composite film 91 is further laminated above the light guide plate 60, and the composite film 91 is used to further diffuse the light emitted from the light guide plate 60; a reflective film 92 is further laminated below the light guide plate 60, and the reflective film 92 is used to reflect the light emitted from the light guide plate 60 back to the light guide plate 60, thereby avoiding the light from hitting other directions except the thin film transistor 70, so as to improve the light energy utilization rate of the light source 50 and reduce the loss; a filter 80 is also provided between the cover plate 20 and the thin film transistor 70, and the filter 80 is used to realize the color image of the display screen 100.

[0084] The flanging part 12 of the frame 10 can be bonded to the thin film transistor 70 in a circle, thereby realizing the fixed installation of the frame 10.

[0085] The material of the cover plate 20 can be glass, acrylic (or called plexiglass), 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 a curved surface and a flat surface, that is, a 2.5D cover plate 20. The light-tight area 22 on the cover plate 20 can be formed on the cover plate 20 by a screen printing process.

[0086] The opaque area 22 of the cover plate 20 and the middle frame 200 can be fixed by colloid bonding. The colloid used can be a light-curing glue, such as ultraviolet (UV) curing glue. The UV curing glue is also called shadowless glue or photosensitive glue. It refers to a type of adhesive that must be cured by ultraviolet light. The photoinitiator (or photosensitizer) in the UV curing glue absorbs ultraviolet light under ultraviolet light to produce active free radicals or cations, which triggers monomer polymerization, cross-linking and branching chemical reactions, so that the adhesive is converted from liquid to solid within a few seconds. The colloid used can also be a heat-curing glue, such as a polyurethane adhesive, which is a sealing colloid cured by heat source, has good stability, no by-products after curing, and good bonding strength and sealing.

[0087] The cover plate 20, the filter 80, the thin film transistor 70, etc. can be bonded together in sequence by a colloid. The colloid can be an optically clear adhesive (OCA), which is a double-sided adhesive tape without a matrix material, and has the characteristics of colorless transparency, high light transmittance (total light transmittance>99%), high adhesion, high temperature resistance, UV resistance, etc., and has a controlled thickness, can provide a uniform spacing, and will not cause yellowing, peeling and deterioration problems after long-term use.

[0088] For example Figure 9 As shown, in one embodiment provided in the present application, the chamfer 13 provided on the frame 10 is a round chamfer.

[0089] Figure 11 yes Figure 8 Another example of the enlarged view of G in the middle, such as Figure 11 As shown, in one embodiment provided in the present application, the chamfer 13 provided on the frame 10 is an oblique chamfer.

[0090] Figure 12 yes Figure 3 A cross-sectional view of another example of FF is shown in FIG. Figure 12 As shown, the curved portion of the flexible circuit board 30 can be close to the outer peripheral surface of the frame 10, and the chamfer avoids the flexible circuit board 30, so that the flexible circuit board 30 can bend naturally without causing excessive internal stress of the flexible circuit board 30.

[0091] Alternatively, Figure 7 As shown, the frame 10 may be rectangular, and the chamfer 13 is located in the middle area of one side of the frame 10 . The length of the area where the chamfer 13 is set on the side corresponds to the width of the flexible circuit board 30 .

[0092] Figure 13 It is a schematic diagram of another example of the frame 10 provided in an embodiment of the present application.

[0093] likeFigure 13 As shown, in an embodiment provided by the present application, the frame 10 is rectangular, and a partial inward depression is formed on one side of the frame 10 to form a groove 14, and the chamfer 13 is located in the groove 14.

[0094] In this embodiment, a groove 14 is provided on the side of the frame 10. When the flexible circuit board 30 bends towards the back side of the frame 10, the bent portion 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 outer peripheral surface of the frame 10 is small. Thus, the range to be blocked by the light-shielding area 22 is smaller, and further, the width d2 of the light-shielding area 22 can be further reduced, which is beneficial to achieving the effect of a narrow black border of the screen.

[0095] As mentioned above, there are various sheet-like or film-like structures such as a light guide plate 60, a composite film 91, and a reflective film 92 in the frame 10. These sheet-like or film-like structures are generally very thin and have small structural strength, and are easily deformed by external forces. The deformation will cause the surfaces of the sheet-like or film-like structures to be uneven, resulting in phenomena such as ripples and light spots in the display screen 100, affecting the display effect. In order to reduce the influence of external forces on components such as the light guide plate 60, the composite film 91, and the reflective film 92 in the frame 10, as Figure 9 and Figure 11 shown, the frame 10 can be integrally formed by a casting process using a metal material, or integrally formed by a stamping process or a laser etching process using a metal sheet. In this case, the entire frame 10 is made of a metal material. Since the frame 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 10, and the deformation amount of the metal frame 10 is small. Therefore, the deformation of the film materials inside the frame 10 can be reduced, ensuring the display effect of the display screen 100.

[0096] The frame 10 can also be integrally formed by an injection molding process using a plastic material. In this case, the entire frame 10 is made of a plastic material. Compared with the all-metal frame 10, the all-plastic frame 10 can reduce the weight of the frame 10, which is beneficial to achieving the requirement of a thin and light design of the smart phone.

[0097] The all-metal frame 10 has a large weight, which is not conducive to achieving a thin and light design. Although the all-plastic frame 10 has a light weight, its structural strength is not as good as that of the all-metal frame 10. In order to balance the requirements of structural strength and thin and light design, the frame 10 can be designed as a component form of two materials, as shown in the following embodiments.

[0098] Figure 14 FIG. is an exploded view of the frame 10 provided by the embodiment of the present application. Figure 15 is Figure 14A partial cross-sectional view of the frame 10 in FIG. Figure 16 yes Figure 15 15 and the plastic frame 16 in the assembly diagram.

[0099] like Figures 14 - 16 As shown, in one embodiment provided by the present application, the frame 10 includes 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 frame structure with a hollow middle and is connected to the inner side of the metal plate 15. The bent edge of the metal plate 15 and the plastic frame 16 constitute a flange portion 12, that is, Figure 16 The portion surrounded by the short dashed line frame is the flange portion 12, and the metal plate 15 excluding the bent portion constitutes the bottom plate portion 11, that is, Figure 16 The portion surrounded by the long dashed line frame is the bottom plate portion 11 .

[0100] In this embodiment, the frame 10 is designed as a component consisting of a metal plate 15 and a plastic frame 16, which can improve the structural strength of the frame 10, reduce the weight of the frame 10, and also have good anti-static ability and heat dissipation performance. The specific reason is that the metal plate 15, as the outer layer of the frame 10, has a high impact strength. When there is an external force, the external force first acts on the metal plate 15. Since the metal plate 15 has a large structural strength and is not easy to deform, it can reduce the damage to the reflective film 92, the light guide plate 60 and other components inside the frame 10. The influence of the external conductive material 15 is eliminated to ensure the display effect of the display screen 100; except for the outermost metal plate 15, the interior of the frame 10 is all plastic frame 16, which can reduce the overall weight of the frame 10 and reduce the manufacturing cost of the frame 10; at the same time, conductive tape can be attached to the metal plate 15 and grounded to improve the anti-static ability of the frame 10 and avoid the main circuit board in the smart phone from generating static electricity interference to the display screen 100; in addition, metal materials generally have good thermal conductivity, which can enable the heat emitted by the light source 50 to be quickly conducted out of the frame 10, thereby improving the working stability of the display screen 100.

[0101] 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 with non-metallic substances such as carbon and silicon added.

[0102] The material of the plastic frame 16 can be high molecular polymers such as polyvinyl chloride (PVC), polypropylene (PP), polyethylene glycol terephthalate (PET), ethylene-vinyl acetate copolymer (EVA), polybutylene terephthalate (PBT), polycarbonate (PC), paraformaldehyde (POM), polyurethane (PU), etc.

[0103] When forming the frame body 10 in this embodiment, it can be processed and manufactured by the insert molding process. Among them, the insert molding process is a molding method in which the insert is installed in the cavity in the state where the mold is opened, and then the mold is closed for injection molding. Specifically, when applying it to the manufacture of the frame body 10 in this embodiment, the pre-processed metal plate 15 is loaded into the molding mold of the frame body 10, and then the molten liquid plastic is injected. After the plastic in the mold cools and solidifies, it is tightly joined with the metal plate 15, and thus the frame body 10 product composed of the metal plate 15 and the plastic frame 16 is made.

[0104] In order to further improve the bonding strength between the metal plate 15 and the plastic frame 16, in an embodiment provided in the present application, the inner side surface of the metal plate 15 that fits the plastic frame 16 is provided with anti-slip texture.

[0105] In this embodiment, setting the anti-slip texture on the metal plate 15 can increase the connection area between 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 anti-slip texture can be structures such as an array of micro-protrusions, micro-holes, corrugations, etc. It can be processed on the metal plate 15 by a numerical control machine tool to obtain the anti-slip texture on its surface.

[0106] Another example Figure 16 As shown, in an embodiment provided in the present application, in the height direction of the frame body 10, that is Figure 16 the Z direction in

[0107] In this embodiment, the top of the plastic frame 16 is higher than the bent part of the edge of the metal plate 15, so as to connect with the thin-film transistor 70 through the plastic frame 16, avoiding direct contact between the edge of the metal plate 15 and the thin-film transistor 70. In the scenario of a smartphone drop, the plastic frame 16 can play a buffering role, preventing the metal plate 15 from impacting the thin-film transistor 70 to ensure the stability of the display screen 100.

[0108] For another example Figure 16 As shown, in an embodiment provided by the present application, on the outer peripheral surface of the frame body 10, that is Figure 16 the surface pointed by the arrow S in, the bent part of the edge of the metal plate 15 is coplanar with the plastic frame 16.

[0109] In this embodiment, the bent part of the edge of the metal plate 15 is coplanar with the plastic frame 16, making the outer peripheral surface of the frame body 10 flat without protruding parts, so as to avoid forming a support for the bent part of the flexible circuit board 30, which is beneficial to making the bent part of the flexible circuit board 30 closer to the outer peripheral surface of the frame body 10, thereby being able to further reduce the width of the light-blocking area 22 of the cover plate 20 and contributing to achieving the narrow black edge effect of the display screen 100.

[0110] Figure 17 is the assembly diagram of the metal plate 15 and the plastic frame 16 provided by the embodiment of the present application. Among them, Figure 17 and Figure 16 the shapes and structures of the metal plate 15 and the plastic frame 16 in are the same. The additional Figure 17 is for facilitating dimension marking to avoid drawing too many auxiliary lines in the same drawing and also for easy understanding.

[0111] For example Figure 17 As shown, in an embodiment provided by the present application, the frame body 10 satisfies the following relational expressions:

[0112] W≥2.5t; H≥5t.

[0113] Among them, 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.

[0114] As mentioned above, the housing 10 is designed as a component composed of two parts, namely the metal plate 15 and the plastic frame 16, which can improve the structural strength of the housing 10 and also reduce the weight of the housing 10. Among them, the thickness t of the metal plate 15 is directly related to the strength and weight of the housing 10. The greater the thickness t of the metal plate 15, the greater the strength of the housing 10, but the weight of the housing 10 will also be larger, which is not conducive to achieving a thin and light design. Therefore, in order to balance the relationship between the strength and weight of the housing 10, in this embodiment, the relationship between the overall height H of the housing 10, the cross-sectional width W of the plastic frame 16, and the thickness t of the metal plate 15 is further defined, so as to ensure the strength of the housing 10 on the premise of ensuring the thinness and lightness of the housing 10.

[0115] For another example Figure 17 As shown, the cross-sectional width value W of the plastic frame 16 can also be understood as, in the X direction, the length value A of the chamfer 13 plus the length value B from the inner side surface of the plastic frame 16 to the chamfer 13, that is, W = A + B. The overall height value H of the housing 10 can also be understood as, in the Z direction, 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, that is, H = C + D + E.

[0116] Figure 17 The chamfer 13 shown in Figure 17 is a round chamfer. When the chamfer 13 is an inclined chamfer, the above relational expressions can also hold, as follows.

[0117] Figure 18 is an assembly diagram of another example of the metal plate 15 and the plastic frame 16 provided in the embodiment of the present application.

[0118] Such as Figure 18 As shown, when the chamfer 13 is an inclined chamfer, the cross-sectional width value W of the plastic frame 16 = A + B, and the overall height value H of the housing 10 = C + D + E.

[0119] Figure 19 is a stress simulation schematic diagram when the flexible circuit board 30 in the embodiment of the present application bends on the housing 10. Figure 20 is a stress simulation schematic diagram when the flexible circuit board 30' in the related art bends on the housing 10'.

[0120] Such as Figure 19 As shown, when the curved part K where the flexible circuit board 30 bends is close to the outer peripheral surface of the housing 10, since the chamfer 13 of the housing 10 can avoid the bent part K of the flexible circuit board 30 and will not interfere with or block the flexible circuit board 30, the flexible circuit board 30 can be bent naturally, and the internal stress of the bent part K of the flexible circuit board 30 is 231.3 Mpa.

[0121] Such as Figure 20As shown, the frame 10' in the related art does not have a chamfer. If the curved part K' of the flexible circuit board 30' is forced to closely adhere to the outer peripheral surface of the frame 10', a relatively large amount of stress will accumulate inside the curved part K' of the flexible circuit board 30', approximately 286.4 Mpa.

[0122] It can be seen that, compared with the frame 10' in the related art, when the curved part K of the flexible circuit board 30 is bent into an arc and closely adheres to the outer peripheral surface of the frame 10 in the embodiment of the present application, the internal stress of the curved part K can be reduced by about 20%. The specific calculation process is as follows: (286.4 - 231.3) / 286.4 = 19.24%. Therefore, it is possible to avoid the tendency of one end of the flexible circuit board 30 close to the thin-film transistor 70 to drag down the thin-film transistor 70, so as to prevent the thin-film transistor 70 from being deformed and causing abnormal display.

[0123] Finally, it should be noted that the above is only the specific implementation manner of the present application, but the protection scope of the present application is not limited thereto. Any changes or substitutions within the technical scope disclosed in the present application should be covered by 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 housing for a display screen (100), the display screen (100) including a flexible circuit board (30) for mounting a display driver chip (40), characterized in that, The frame body (10) has a bottom plate portion (11) and a flanging portion (12). The flanging 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). A chamfer (13) is provided on the outer side of the corner between the flanging portion (12) and the bottom plate portion (11). The flexible circuit board (30) is in an arc-shaped bend and its end extends to the side of the bottom plate portion (11) facing away from the flanging portion (12). The chamfer (13) is used to avoid the bent portion of the flexible circuit board (30).

2. The housing according to claim 1, characterized in that, The chamfer (13) includes a round chamfer or an inclined chamfer.

3. The housing according to claim 1, characterized in that, The frame body (10) is rectangular. A groove (14) is formed by a partial inward depression on one side edge of the frame body (10), and the chamfer (13) is located in the groove (14).

4. The housing according to claim 1, characterized in that, The frame body (10) includes 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 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) together constitute the flanging portion (12), and the part of the metal plate (15) excluding the bent part constitutes the bottom plate portion (11).

5. The housing according to claim 4, characterized in that, 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) and the plastic frame (16) are coplanar.

7. The housing according to claim 6, wherein The frame body (10) satisfies the following relational expressions: 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 4-7, characterized in that, The inner side surface of the metal plate (15) that fits with the plastic frame (16) is provided with glue-gripping lines.

9. A display screen, characterized in that, It includes the frame body (10) as described in any one of claims 1-8.

10. The display screen according to claim 9, wherein It further includes 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), and the other end of the flexible circuit board (30) extends to one side of the bottom plate portion (11) of the frame body (10). The thin film transistor (70) covers the flanging portion (12) of the frame body (10).

11. The display screen according to claim 10, characterized in that, It further includes 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 on the side of the light guide plate (60).

12. An electronic device, characterized in that, It includes the display screen (100) as described in any one of claims 9-11.

13. The electronic device according to claim 12, wherein It further includes a middle frame (200). The display screen (100) includes a cover plate (20), and the cover plate (20) is hermetically connected to the periphery of the middle frame (200).

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