Display module and display device

Disclosed are a display module and a display device. The display module includes a rear shell and an intermediate frame, and a display screen, an ultra-thin protective cover plate, and a protective film. The rear shell has a back plate and a first folded edge bent and extending from the edge of the back plate to the side of the display screen. The intermediate frame is located in a region enclosed by the back plate and the first folded edge. The ultra-thin protective cover plate has a first surface away from the side of the display screen, and a side surface located on the edge. The protective film includes a first part attached to the first surface of the ultra-thin protective cover plate, and a second part coating the side surface of the ultra-thin protective cover plate.

CROSS REFERENCE TO RELATED APPLICATIONS

The present disclosure is a US National Stage of International Application No. PCT/CN2021/098813, filed on Jun. 8, 2021 which claims priority to Chinese Patent Application No. 202010728417.5, filed to the China Patent Office on Jul. 24, 2020 and entitled “DISPLAY MODULE AND DISPLAY DEVICE”, the entire contents of which are incorporated herein by reference.

FIELD

The present disclosure relates to the field of display, in particular to a display module and a display device.

BACKGROUND

At present, some manufacturers of curved and folded display products, such as mobile phone manufacturers, have introduced a solution of adopting ultra-thin flexible glass (UTG) to protect flexible display screens; and the ultra-thin flexible glass (UTG) has the characteristics of being ultra-thin and foldable, good in flexibility, having smooth hand feeling and good uniformity, and being capable of effectively avoiding screen damage relative to polymer protective films.

However, due to the relatively large hardness of the ultra-thin glasses, excessive rebound force is easily generated on edges during attaching of a curved screen or bending, resulting in film separation, and affecting the yield of the display products.

SUMMARY

The present application discloses a display module and a display device, so as to alleviate poor film separation of a flexible display product using ultra-thin glasses, etc., and increase the yield of a display product.

In order to achieve the above objectives, the present application provides the following technical solutions.

A display module includes a rear cover and a middle frame, and a display screen, an ultrathin protective cover plate, and a protective film which are located on a side of the middle frame facing away from the rear cover and are stacked in sequence; wherein the rear cover has a back plate and a first folded edge bent and extending from an edge of the back plate to one side of the display screen; the middle frame is located in a region enclosed by the back plate and the first folded edge; the ultrathin protective cover plate has a first surface facing away from one side of the display screen and a side surface located on the edge; and the protective film includes a first part attached to the first surface of the ultrathin protective cover plate, and a second part coating the side surface of the ultrathin protective cover plate and extending between the middle frame and the first folded edge of the rear cover.

Optionally, a shape of the ultrathin protective cover plate is square, and at least one side edge of the ultrathin protective cover plate is bent towards one side of the rear cover; and the second part of the protective film coats the edge side surface of the at least one side edge of the ultrathin protective cover plate and extends between the middle frame and the first folded edge of the rear cover.

Optionally, a bending angle of the edge of the ultrathin protective cover plate towards one side of the rear cover is smaller than or equal to 90 degrees.

Optionally, the display screen includes a square screen part, and a bent part located on a first side of the screen part and bent to a non-display surface of the screen part; the ultrathin protective cover plate is attached to the screen part, and the side edge of the ultrathin protective cover plate close to the first side edge is bent towards one side of the rear cover; and the second part of the protective film coats the edge side surface of the ultrathin protective cover plate close to the first side edge and extends between the middle frame and the first folded edge of the rear cover.

Optionally, the second part of the protective film and the first folded edge of the rear cover are pasted and fixed.

Optionally, the second part of the protective film and the first folded edge of the rear cover are pasted through a double faced adhesive tape.

Optionally, the second part is provided with an opening at a position between the middle frame and the first folded edge of the rear cover; and an inner side of the first folded edge is provided with a protruding part matched with the opening, and the protruding part is embedded into the opening.

Optionally, a shape of the ultrathin protective cover plate is rectangular, and two opposite long side edges of the ultrathin protective cover plate are bent towards one side of the rear cover; and the second part of the protective film includes two parts, and the two parts are respectively located on two sides of the first part close to the two long side edges, and respectively coat side surfaces of the two long side edges of the ultrathin protective cover plate and extend between the middle frame and the first folded edge of the rear cover.

Optionally, each of the two parts is provided with the plurality of openings, and the plurality of openings are arranged and distributed along the long side edge of the ultrathin protective cover plate; and the inner side of the first folded edge is provided with a plurality of protruding parts matched with the plurality of openings in a one-to-one correspondence mode, and the protruding parts are embedded into the corresponding openings.

Optionally, the display module further includes a clamp arranged in a region enclosed by the back plate of the rear cover and the first folded edge, and configured to clamp and fix the middle frame and the second part of the protective film.

Optionally, the middle frame includes a main body part opposite to the back plate of the rear cover and used to bear the display screen and the ultrathin protective cover plate, and a second folded edge bent from an edge of the main body part to one side of the back plate of the rear cover; the second part of the protective film extends between the second folded edge of the middle frame and the first folded edge of the rear cover; and the clamp is a full-surrounded frame or a semi-surrounded frame arranged along the second folded edge of the middle frame, and is provided with a clamping groove opened facing away from one side of the back plate of the rear cover, and the clamping groove clamps the second part of the protective film and the second folded edge of the middle frame.

Optionally, the clamp is an elastomer, and an opening size of the clamping groove is smaller than an internal size of the clamping groove.

Optionally, the clamp and the rear cover are pasted and fixed.

Optionally, the ultrathin protective cover plate is ultra-thin glass.

Optionally, the protective film includes a transparent polyimide film or a terephthalic acid plastic film.

Optionally, the display module further includes a plastic diaphragm located between the display screen and the ultrathin protective cover plate, and the plastic diaphragm includes a transparent polyimide film or a terephthalic acid plastic film.

A display device includes any one of the above display modules.

DETAILED DESCRIPTION OF THE EMBODIMENTS

The technical solutions of the embodiments of the present application are described clearly and completely in combination with accompanying drawings of the embodiments of the present application below, apparently, the described embodiments are only a part of the embodiments of the present application, not all of the embodiments. Based on the embodiments of the present application, all other embodiments obtained by those of ordinary skill in the art without creative work shall fall within the protection scope of the present application.

As shown inFIG.1, an embodiment of the present application provides a display module, including a rear cover1and a middle frame2, and a display screen3, an ultrathin protective cover plate4, and a protective film5which are located on a side of the middle frame2facing away from the rear cover1and are stacked in sequence.

The rear cover1has a back plate11and a first folded edge12bent and extending from an edge of the back plate11to one side of the display screen3; the middle frame2is located in a region enclosed by the back plate11and the first folded edge12.

The ultrathin protective cover plate4has a first surface facing away from one side of the display screen3and a side surface located on the edge.

The protective film5includes a first part51attached to the first surface of the ultrathin protective cover plate4, and a second part52coating the side surface of the ultrathin protective cover plate4and extending between the middle frame2and the first folded edge12of the rear cover1.

In the above display module, the protective film5coats the ultrathin protective cover plate4, and includes two parts (the first part51and the second part52), specifically, other than including the first part51attached to the first surface of the ultrathin protective cover plate4, the protective film5further includes the second part52bent and extending from an edge of the first part51to an interior of the rear cover1, and then, the ultrathin protective cover plate4is integrally coated in the protective film5, but the edge part (the second part52) of the protective film5is assembled and limited between the middle frame2and the first folded edge12of the rear cover1, so when the ultrathin protective cover plate4is bent and attached to the edge (attached to the curved screen as shown inFIG.1) or is changed in a bending mode, film separation will not generate with the display screen3due to the action of rebound force.

In conclusion, according to the display module provided by the embodiment of the present application, the situation of film separation caused by excessive rebound force when the ultrathin protective cover plate is attached to the curved screen or bent may be relieved, and the yield of display products is increased.

In some embodiments, the ultrathin protective cover plate4is ultra-thin glass (UTG).

Furthermore, the protective film5is a transparent polymer plastic film, and may include a transparent polyimide film (CPI) or a terephthalic acid plastic film (PET). For example, the protective film5may include the transparent polyimide film and a hardening coating located on a side of the transparent polyimide film facing away from the ultrathin protective cover plate4, and the hardening coating may be an acrylate material.

The ultra-thin glass (UTG) is a glass layer with a thickness magnitude of dozens of microns and below, may be bent and deformed, and may be folded. Specifically, as early as four years ago, the Schott Glass manufacturer has produced 70-micron deformable ultra-thin glasses. At present, some phone manufacturers have already used Schott's 30-micron deformable glasses, and Schott further expresses that thicknesses of the glasses may be reduced to 25 microns in a laboratory. Specifically, relative to a polymer plastic film, ultra-thin glass may effectively avoid screen damage, and may simultaneously provide better optical definition; meanwhile, creases are not easily generated on the ultra-thin glass, and reliability is good; and the ultra-thin glass will not be spontaneously decomposed like plastics, and is long in life, thereby providing more stable and reliable protection for display screens.

In some embodiments, as shown inFIG.1andFIG.2, a shape of the ultrathin protective cover plate4is square, and at least one side edge of the ultrathin protective cover plate4is bent towards one side of the rear cover1.

Exemplarily, a bending angle of the edge of the ultrathin protective cover plate4towards one side of the rear cover1is smaller than or equal to 90 degrees.

Specifically, the display module of the embodiment of the present application may be a curved display module, the ultrathin protective cover plate4is a curved cover plate, and the display screen3is a curved screen with a bending shape being roughly the same with that of the ultrathin protective cover plate4.

Exemplarily, the second part52of the protective film5coats the edge side surface of the at least one side edge of the ultrathin protective cover plate4and extends between the middle frame2and the first folded edge12of the rear cover1. In other words, when the side edge of the ultrathin protective cover plate4is bent, a protective layer extends to form the second part52to coat and limit the side edge of the ultrathin protective cover plate4, so as to avoid film separation between the bending edge of the side and the display screen3under the action of the rebound force.

In one specific embodiment, taking a display module of a curved mobile phone as an example, as shown inFIG.1andFIG.2, wherein the display screen3is rectangular, and is a curved screen with two long side edges being bent; the ultrathin protective cover plate4is attached to the display screen3, edge bending shapes of the two are roughly the same, that is, the ultrathin protective cover plate4is also rectangular, and two opposite long side edges are also bent towards one side of the rear cover1. Specifically, an edge bending angle of the display screen3and the ultrathin protective cover plate4is roughly 90 degrees, and the edge of the ultrathin protective cover plate4may be aligned with the edge of the display screen3, or exceed the edge of the display screen3.

Exemplarily, as shown inFIG.1toFIG.3, the first part51of the protective film5is attached to a first surface41of the ultrathin protective cover plate4, is roughly the same with the first surface41of the ultrathin protective cover plate4in shape, and is rectangular. The second part52of the protective film5includes two parts, the two parts are respectively located on two sides of the first part51close to the two long side edges, and respectively coat side edge side surfaces42of the two long sides of the ultrathin protective cover plate4and extend between the middle frame2and the first folded edge12of the rear cover1.

Specifically, when the curved display module of the embodiment of the present application is applied to a mobile phone, the whole bending design of the mobile phone curved screen is beneficial for grasping, and is better attached to palm radian, so a distance of a thumb touching the screen during one-hand operation is reduced, and horizontal cross-screen operation experience under a large-size screen can be improved theoretically. The screen may become thinner, light in weight and lower in power consumption. In addition, the curved screen increases a visual angle, so an effect is also good from an off-centered angle.

In a specific embodiment, as shown inFIG.4, the display screen is a flexible display screen, and may include a square screen part31, and a bent part32located at the first side edge of the screen part31and bent to a non-display surface of the screen part. Specifically, at the moment, the ultrathin protective cover plate4is matched with the screen part31in shape and attached to the screen part31, and the side edge of the first side of the ultrathin protective cover plate4close to the screen part31is bent towards one side of the rear cover1.

Exemplarily, at the moment, the second part52of the protective film5coats the side edge side surface of the ultrathin protective cover plate4close to the first side edge and extends between the middle frame2and the first folded edge12of the rear cover1.

In other words, when the display screen includes the bent part32bent towards a back surface, a side close to the bent part32of the ultrathin protective cover plate4may be bent towards one side of the rear cover1to protect the curved screen of the side surface. Correspondingly, the protective film5may also extend on the side to form the second part52, so as to avoid film separation of the bending edge of the side of the ultrathin protective cover plate4under the action of the rebound force with the display screen.

Exemplarily, taking the curved mobile phone as an example, wherein the screen part31of the display screen is rectangular, and the first side edge of the screen part31is a short edge of the screen part31. Specifically, the two long side edges of the screen part31are bent towards one side of the rear cover1(as shown inFIG.1), and the bent part32is bent along the first side edge of the screen part31to the back surface of the screen part31(as shown inFIG.4). The ultrathin protective cover plate4is matched with the screen part31in shape and attached to the screen part31, that is, the side of the two long side edges of the ultrathin protective cover plate4are bent towards one side of the rear cover1(as shown inFIG.1), and the side edge of the ultrathin protective cover plate close to the first side edge of the screen part31is bent towards one side of the rear cover1(as shown inFIG.4), thereby forming protection for side bending edges of the screen part31. Correspondingly, the second part52of the protective film5simultaneously coats the above three side surfaces of the ultrathin protective cover plate4and extends between the middle frame2and the first folded edge12of the rear cover1.

In some embodiments, as shown inFIG.1, the second part52of the protective film5and the first folded edge12of the rear cover1are pasted and fixed, that is, an edge part of the protective film5and the first folded edge12of the rear cover1are pasted, so as to ensure that the edge of the protective film5is stably limited into the rear cover1.

Exemplarily, double faced adhesive tape is arranged between the second part52of the protective film5and the first folded edge12of the rear cover1(not shown in the figure), and the second part52of the protective film5and the first folded edge12of the rear cover1are pasted through the double faced adhesive tape.

In some embodiments, as shown inFIG.5andFIG.6, the second part52of the protective film5is provided with an opening520formed in a position between the middle frame2and the first folded edge12of the rear cover1. Specifically, a protruding part120matched with the opening520is arranged on an inner side of the first folded edge12of the rear cover1, and the protruding part120is embedded into the opening520.

Specifically, clamping connection between the edge of the protective film5and the rear cover1may be achieved by using embedding of the protruding part120of the first folded edge12and the opening520of the second part52, thereby further ensuring the stability of the edge of the protective film5being limited into the rear cover1.

Exemplarily, as shown inFIG.3, the second part52of the protective film5provided by the above specific embodiment includes two parts, at the moment, the plurality of openings520are formed in each of the two parts, and the plurality of openings520are arranged and distributed along the long side edge of the ultrathin protective cover plate (the long side edge of the first part51). Furthermore, at the moment, the plurality of protruding parts120matched with the plurality of openings520in a one-to-one correspondence mode may be arranged on the inner side of the first folded edge12of the rear cover1, and the protruding parts120are embedded into the corresponding openings520.

In some embodiments, as shown inFIG.7, the display module provided by the embodiment of the present application may further include a clamp7, the clamp7is arranged in a region enclosed by the back plate11of the rear cover1and the first folded edge12, and is configured to clamp and fix the middle frame2and the second part52of the protective film5, so the edge (the second part52) of the protective film5is better limited into the rear cover1.

Exemplarily, as shown inFIG.1, the middle frame2includes a main body part21opposite to the back plate11of the rear cover1and used to bear the display screen3and the ultrathin protective cover plate4, and a second folded edge22bent from an edge of the main body part to one side of the back plate11of the rear cover1. The second part52of the protective film5extends between the second folded edge22of the middle frame2and the first folded edge12of the rear cover1.

Furthermore, as shown inFIG.1,FIG.7andFIG.8, the clamp7may be a full-surrounded frame or a semi-surrounded frame arranged along the second folded edge22of the middle frame2, and is provided with a clamping groove71opened facing away from one side of the back plate11of the rear cover1, and the clamping groove71clamps the second part52of the protective film5and the second folded edge22of the middle frame2. Specifically, the clamping groove71may be a strip-type groove or an annular groove extending along the second folded edge22of the middle frame2. The second part52of the protective film5provided by the above specific embodiment includes two parts as an example (as shown inFIG.3), at the moment, as shown inFIG.8, the clamping groove71may include two strip-type grooves extending along the two long sides of the middle frame2.

In some embodiments, the clamp7may be an elastomer; and an opening size of the clamping groove71in the clamp7is smaller than an internal size of the clamping groove71. Specifically, the internal size of the clamping groove71is a radial size of a cross section. In other words, when the clamping groove71is a strip type or an annular, an internal width of the clamping groove71is greater than an opening width, so the second folded edge of the middle frame and the second part of the protective film are convenient to clamp, and clamping tightness may be improved. For example, a longitudinal section of the clamping groove71may be trapezoidal.

In some embodiments, the clamp7and the rear cover1may be pasted and fixed.

In some embodiments, in the display module provided by the embodiment of the present application, the display screen may be an OLED panel.

In some embodiments, as shown inFIG.9, the display module provided by the embodiment of the present application may further include a plastic diaphragm8located between the display screen3and the ultrathin protective cover plate4, and the plastic diaphragm8may be a transparent polymer plastic film, such as a transparent polyimide film (CPI) or a terephthalic acid plastic film (PET). Specifically, the plastic diaphragm8may be matched with the ultrathin protective cover plate4in shape, and surfaces of two sides are respectively attached to the ultrathin protective cover plate4and the display screen3, and specifically attached through optical clear adhesive (OCA).

Specifically, the display module provided by the embodiment of the present application may further include the optical clear adhesive (OCA)6(as shown inFIG.5toFIG.7) located between the display screen3and the ultrathin protective cover plate4, and a radiating module (not shown in the figure) and a stainless steel supporting layer8(as shown inFIG.4) located between the middle frame2and the display screen3and other structures, in addition, a main circuit board and other function modules (not shown in the figure) may further be included between the middle frame2and the rear cover1, which is not repeated herein one by one.

In addition, the present application further provides a display device, and the display device includes any one of the above display modules.

Specifically, the display device may be an OLED display device, and may be specifically applied to a tablet personnel computer, a mobile phone and other display devices.

It should be noted that in some embodiments of the present disclosure, the display module and the display device may further include other structures, and further be decided according to actual demands, which is not limited by the embodiments of the present disclosure. In addition, size and material selection provided by structures of the embodiments of the present disclosure is not limited to the above embodiments, and basic requirements thereof may refer to the description above, which will not be repeated herein. Or, the accompanying drawings of the present application are only schematic diagrams, and sizes and proportions of structures in the figures will not represent actual size proportions of the structures.

It will be apparent to those skilled in the art that various modifications and variations may be made to the present disclosure without departing from the spirit or scope of the present application. In this way, if these modifications and variations of the present application fall within the scope of the claims of the present application and their equivalent art, the present application also intends to include these modifications and variations.