Screen cover plate, display module and display device

Abstract

The invention provides a screen cover plate, a display module and a display device, and belongs to the technical field of display device.The screen cover plate comprises a cover plate body and a second bending part, the cover plate body comprises a straight part and a first bending part connected with the side edge of the straight part, the straight part is provided with an inner surface and an outer surface which are arranged oppositely, and the first bending part is connected with the side edge of the straight part; the first bending part protrudes in a direction deviating from the outer surface; the second bending part is arranged on the side, facing the outer surface, of the first bending part, the direction deviating from the outer surface is the forward direction, and the distance value between the surface, deviating from the first bending part, of the second bending part and the outer surface is a non-negative number. According to the screen cover plate provided by the invention, the second bending part is arranged, and the refraction angle change of the light on the second bending part is utilized, so that the area of the light emitting region of the screen cover plate is increased, and the screen-to-body ratio of the display module is effectively improved.

Description

Technical Field

[0001] The present application relates to the field of display technology, and in particular to a screen cover, a display module and a display device. Background Art

[0002] With the development of terminal devices such as mobile phones, tablets, and desktops, the requirements for the screen-to-body ratio in terms of the appearance of the entire machine are getting higher and higher, in order to achieve a borderless display effect.

[0003] The display screen of the terminal device usually includes a display module and a cover plate, wherein the cover plate is arranged on the light-emitting surface of the display module. The display screen is supported by a middle frame, and the edge of the cover plate extends out of the side of the display module and overlaps the middle frame.

[0004] However, the screen-to-body ratio of the display module has reached a bottleneck due to the constraints of the production process. For manufacturers, how to further increase the screen-to-body ratio of the display screen and achieve a narrower bezel structure is a difficult problem that needs to be overcome. Summary of the invention

[0005] In view of this, the purpose of the present application is to propose a screen cover, a display module and a display device to solve the problem in the related art that the display module cannot further increase the screen-to-body ratio due to production process constraints.

[0006] Based on the above purpose, the present application provides a screen cover, including:

[0007] The cover plate body comprises a straight portion and a first bent portion connected to a side of the straight portion, wherein the straight portion has an inner surface and an outer surface disposed opposite to each other, and the first bent portion protrudes in a direction away from the outer surface;

[0008] The second bending portion is arranged on a side of the first bending portion close to the outer surface, with the direction away from the outer surface as the positive direction, and the distance value between the surface of the second bending portion away from the first bending portion and the outer surface is a non-negative number.

[0009] Further, a projection of the first bent portion on the plane where the straight portion is located is located within a projection of the second bent portion on the plane where the straight portion is located.

[0010] Furthermore, the second bending portion includes a first transition surface connected to the outer surface, and an outer arc surface connected to the first transition surface, and the first transition surface and the outer surface are located on the same plane.

[0011] Furthermore, the curvature radius of the outer arc surface is the same as the curvature radius of the first bending portion.

[0012] Furthermore, the second bending portion further includes a second transition surface, one end of the second transition surface is connected to the outer arc surface, and the other end of the second transition surface is connected to the extended end of the first bending portion.

[0013] Further, along a direction away from the outer surface, a distance between the second transition surface and a surface of the first bending portion close to the second bending portion gradually decreases.

[0014] Furthermore, the second transition surface is perpendicular to the outer surface.

[0015] Furthermore, the first bending portion is arranged around the outer peripheral edge of the straight portion.

[0016] Furthermore, the straight portion, the first bent portion and the second bent portion are integrally formed.

[0017] Based on the same inventive concept, the present application also provides a display module, including the screen cover as described in any one of the above items, and further including:

[0018] A display panel, wherein the screen cover is arranged on the light emitting side of the display panel;

[0019] A polarizer is disposed between the screen cover and the display panel, wherein the polarizer, the display panel and the screen cover are connected via a connecting portion;

[0020] The ultra-clean film is arranged on a side of the display panel away from the polarizer.

[0021] Based on the same inventive concept, the present application also provides a display device, including the display module as described above.

[0022] From the above, it can be seen that the screen cover provided by the present application thickens the overall thickness of the side bending portion of the cover body by setting a second bending portion on the side of the first bending portion close to the outer surface. At the same time, the distance value between the surface of the second bending portion away from the first bending portion and the outer surface is a non-negative number. According to the principle of refraction of light, the locally thickened side bending portion is equivalent to increasing the light propagation path, thereby increasing the edge luminous area of ​​the cover body and effectively improving the screen-to-body ratio of the screen cover. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the technical solutions in the present application or related technologies, the drawings required for use in the embodiments or related technical descriptions are briefly introduced below. Obviously, the drawings described below are only embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0024] Figure 1aIt is a schematic diagram of light propagation of a flat screen in the related art;

[0025] Figure 1b A schematic diagram of light propagation on a curved screen in the related art;

[0026] Figure 2 This is a partial structural schematic diagram of the screen cover in the embodiment of the present application;

[0027] Figure 3a It is a front view of an exemplary screen cover in an embodiment of the present application;

[0028] Figure 3b for Figure 3a A schematic diagram of the partial structure of the cooperation between the middle straight portion and the second bending portion;

[0029] Figure 4 A schematic diagram of light propagation of a screen cover with uniform wall thickness in the related art;

[0030] Figure 5 This is a schematic diagram of light propagation of the screen cover in an embodiment of the present application;

[0031] Figure 6 Schematic diagram of light propagation at an equivalent refraction angle in an embodiment of the present application.

[0032] Description of Reference Numerals

[0033] 1. Straight portion; 11. Inner surface; 12. Outer surface; 2. First bending portion;

[0034] 3. second bending portion; 31. first transition surface; 32. outer arc surface; 33. second transition surface;

[0035] 4. Ultra-clean film; 5. Display panel; 6. Polarizer; 7. Optical adhesive layer; 8. Back film layer; 9. Screen cover. DETAILED DESCRIPTION

[0036] In order to make the objectives, technical solutions and advantages of the present application more clearly understood, the present application is further described in detail below in combination with specific embodiments and with reference to the accompanying drawings.

[0037] It should be noted that, unless otherwise defined, the technical terms or scientific terms used in the embodiments of the present application should be the usual meanings understood by people with ordinary skills in the field to which the present application belongs. The "first", "second" and similar words used in the embodiments of the present application do not represent any order, quantity or importance, but are only used to distinguish different components. "Including" or "comprising" and similar words mean that the elements or objects appearing in front of the word cover the elements or objects listed after the word and their equivalents, without excluding other elements or objects. "Connect" or "connected" and similar words are not limited to physical or mechanical connections, but can include electrical connections, whether direct or indirect. "Up", "down", "left", "right" and the like are only used to indicate relative positional relationships. When the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0038] From the development of mobile phone display forms, from the initial LCD (Liquid Crystal Display) screen with black borders, to the later OLED (Organic Light-Emitting Diode) full-screen mobile phones, from the notch screen to the hollow screen, and then to the current OLED extremely narrow bezel module, the relevant industry has been committed to improving the screen-to-body ratio of the display.

[0039] Generally speaking, the screen-to-body ratio is the ratio of the screen's luminous area to the overall area of ​​the screen's front panel. Restricted by the production process, the screen-to-body ratio of OLED modules has reached a bottleneck. Manufacturers are willing to sacrifice production yield and reduce the module border as much as possible in order to pursue the process limit of screen-to-body ratio.

[0040] like Figure 1a As shown, Figure 1a The direction of the middle arrow is the direction of light emission. For a purely flat screen cover (straight screen), after the screen cover is attached to the display panel, excluding the frame sealing area, the remaining area of ​​the screen cover is the effective light-emitting area of ​​the screen cover.

[0041] As for the curved screen cover in the related art, the curved screen cover has a certain effect of increasing the screen-to-body ratio. Conventional curved screen covers are generally composed of a straight part and a curved part with uniform wall thickness formed in one piece. Due to the refraction of light in the curved part, the area of ​​the screen cover actually observed by the naked eye is slightly larger than the luminous area of ​​the actual straight part of the screen cover. The specific performance is as follows Figure 1b As shown, Figure 1bThe direction of the middle arrow is the direction of the light emission. After the screen cover is attached to the display panel, the light emitted from the display panel enters the bent part. After the light is refracted and emitted from the bent part, the actual emitted light is closer to the edge area of ​​the screen cover than the light emitted directly from the straight part.

[0042] However, for the above-mentioned curved screen cover, after adopting relevant technical means such as extremely narrow bezels, extremely narrow hole bezels and large-angle screen covers, the screen-to-body ratio limit of conventional projects has been reached, and the screen-to-body ratio of the screen cover cannot be improved further.

[0043] Based on the above problems, the present application proposes a screen cover, a display module and a display device to further improve the screen-to-body ratio of the module and enhance product competitiveness without compressing the module's limit process and ensuring the module yield.

[0044] like Figure 2 As shown, one or more embodiments of the present application provide a screen cover 9, including a cover body and a second bending portion 3, wherein the cover body includes a straight portion 1 and a first bending portion 2 connected to the side of the straight portion 1, the straight portion 1 has an inner surface 11 and an outer surface 12 arranged opposite to each other, and the first bending portion 2 protrudes in a direction away from the outer surface 12; the second bending portion 3 is arranged on a side of the first bending portion 2 close to the outer surface 12, with the direction away from the outer surface 12 as the positive direction, and the distance value between the surface of the second bending portion 3 away from the first bending portion 2 and the outer surface 12 is a non-negative number.

[0045] From the above description, it can be seen that the screen cover 9 provided in the present application thickens the overall thickness of the side bending portion of the cover body by setting a second bending portion 3 on the side of the first bending portion 2 close to the outer surface 12. When the distance value between the surface of the second bending portion 3 away from the first bending portion 2 and the outer surface 12 is non-negative, according to the principle of refraction of light, the locally thickened side bending portion is equivalent to increasing the light propagation path, thereby increasing the edge luminous area of ​​the cover body and effectively improving the screen-to-body ratio of the screen cover 9.

[0046] It should be noted that the screen cover 9 described in the embodiment of the present application is usually applied to curved screen display devices, such as curved mobile phone devices, curved tablet devices or curved car-mounted screen devices, etc. The straight portion 1 of the cover body is the plane display area of ​​the curved screen display device, and the first bent portion 2 and the second bent portion 3 are the side curved display areas of the curved screen display device. In specific implementation, the screen cover 9 is arranged on the light-emitting side of the display module, the inner surface 11 of the cover body is arranged close to the light-emitting side, and the outer surface 12 is arranged away from the light-emitting side, that is, the first bent portion 2 of the cover body is bent and protruded in the direction away from the light-emitting side. Here, the following description is based on the curved mobile phone display device.

[0047] In some embodiments, the flat portion 1 is a flat display screen, such as Figure 3a As shown, the straight portion 1 is a rectangular flat plate display screen, so as to be fitted and fixed to the display module. In some alternative embodiments, the straight portion 1 can also be other shapes such as circular or elliptical.

[0048] In the above embodiment, the direction away from the outer surface 12 is taken as the positive direction. Figure 2 In the downward z direction perpendicular to the direction of the straight portion 1, the surface of the second bent portion 3 facing away from the first bent portion 2 is the actual light-emitting surface of the second bent portion 3, and the distance between the light-emitting surface and the outer surface 12 is greater than or equal to zero, that is, the highest point of the light-emitting surface in this direction does not exceed the horizontal plane of the outer surface 12. This arrangement ensures that the thickened part formed by the first bent portion 2 and the second bent portion 3 does not affect the normal display structure of the screen cover 9, thereby avoiding warping of the outer edge of the straight portion 1.

[0049] In some embodiments, the projection of the first bent portion 2 on the plane where the straight portion 1 is located is located within the projection of the second bent portion 3 on the plane where the straight portion 1 is located. Specifically, the second bent portion 3 completely covers the first bent portion 2 in its extension direction. This arrangement can ensure that the outgoing light in the edge area is emitted from the second bent portion 3, thereby utilizing the second bent portion 3 to expand the light-emitting area of ​​the screen cover 9.

[0050] In some embodiments, preferably, the straight portion 1, the first bent portion 2 and the second bent portion 3 are integrally formed, and the straight portion 1, the first bent portion 2 and the second bent portion 3 are all made of the same material, such as 3D glass material or flexible light-transmitting material. Through integral molding, there is no docking surface or joining surface between the first bent portion 2 and the second bent portion 3, and the outgoing light can be directly emitted through the first bent portion 2 and the second bent portion 3, avoiding angle interference caused by the existence of a docking surface between the first bent portion 2 and the second bent portion 3.

[0051] like Figure 2 As shown, the first bending portion 2 is a curved surface structure or an arc structure with a smooth transition. The wall thickness of the first bending portion 2 and the straight portion 1 is the same, and the protruding height of the first bending portion 2 can be set according to the actual application scenario. Correspondingly, the second bending portion 3 can be a curved surface structure, an arc structure, a convex structure, a rounded structure, etc. The surface of the second bending portion 3 away from the first bending portion 2 can be a curved surface with a smooth transition, or a surface connected in sequence by a plane, a curved surface, and a plane, or a surface connected in sequence by a plane, a curved surface, and an inclined surface. As long as the distance value between the surface of the second bending portion 3 away from the first bending portion 2 and the outer surface 12 is a non-negative number, the specific surface morphology is not limited here.

[0052] In some embodiments, the second bent portion 3 includes a first transition surface 31 connected to the outer surface 12, and an outer arc surface 32 connected to the first transition surface 31, and the first transition surface 31 and the outer surface 12 are located on the same plane. Here, since the first transition surface 31 and the outer surface 12 are both planes, the first transition surface 31 of the second bent portion 3 can increase the light-emitting area of ​​the straight portion 1 of the cover body.

[0053] In the above embodiment, preferably, the curvature radius of the outer arc surface 32 is the same as the curvature radius of the first bending portion 2, that is, the outer arc surface 32 and the first bending portion 2 have the same degree of curvature. When the outgoing light passes through the outer arc surfaces 32 of the first bending portion 2 and the second bending portion 3, the outer arc surfaces 32 with the same curvature radius can make the outgoing light emitted at a predetermined angle, which is beneficial to maintaining the uniform emission of the outgoing light.

[0054] In some embodiments, the radius of curvature of the outer arc surface 32 is different from the radius of curvature of the first bending portion 2. For example, the radius of curvature of the outer arc surface 32 is greater than the radius of curvature of the first bending portion 2. At this time, when the outgoing light passes through the first bending portion 2 and the second bending portion 3, the light-emitting area will also be increased, but the problem of scattered light and mixed light of the outgoing light may occur.

[0055] Based on the above description, the second bending portion 3 further includes a second transition surface 33, one end of the second transition surface 33 is connected to the outer arc surface 32, and the other end of the second transition surface 33 is connected to the extended end of the first bending portion 2. Here, the second transition surface 33 is provided to facilitate the second bending portion 3 and the first bending portion 2 to form a transition connection, so that the ends of the first bending portion 2 and the second bending portion 3 away from the straight portion 1 are connected to the middle frame of the display device.

[0056] Here, the distance between the second transition surface 33 and the first bent portion 2 is gradually reduced in the direction away from the outer surface 12. When the second transition surface 33 gradually changes to the end of the first bent portion 2 away from the straight portion 1 (i.e., the extended end), the distance between the second transition surface 33 and the first bent portion 2 is a non-positive number. That is, the second transition surface 33 gradually extends into the interior of the first bent portion 2, so that the thickness of the end of the first bent portion 2 away from the straight portion 1 gradually becomes thinner. This setting can facilitate the end of the first bent portion 2 away from the straight portion 1 to be butted and sealed with the middle frame, thereby facilitating the thin and light design of the display device.

[0057] In some embodiments, the second transition surface 33 is designed to be perpendicular to the outer surface 12. In the present application, the outgoing light is generally refracted through the first transition surface 31 and the outer arc surface 32 to exit the screen cover 9 without passing through the second transition surface 33. Therefore, the second transition surface 33 is perpendicular to the outer surface 12 to keep the frame of the display device vertical, avoiding the problem of affecting the feel due to the extension or retraction of the second transition surface 33 to form a wedge-shaped edge.

[0058] In the above embodiment, the greater the extension distance of the first transition surface 31 relative to the straight portion 1, the greater the thickness of the second bending portion 3 along the direction perpendicular to the second bending portion 3. At this time, the greater the refraction angle of the outgoing light through the first bending portion 2 and the second bending portion 3, and the larger the light-emitting area of ​​the screen cover 9.

[0059] Therefore, it is preferred that Figure 3a and Figure 3b As shown, the first transition surface 31 and the second transition surface 33 of the second bending portion 3 are extended as much as possible, and the arc length of the outer arc surface 32 is much smaller than the extension distance of the first transition surface 31 and the second transition surface 33. In this state, the outer end surface of the second bending portion 3 is approximately a right angle, and the outgoing light can be completely emitted through the first transition surface 31 and the outer arc surface 32 to ensure a larger light-emitting area.

[0060] It should be noted that the first bending portion 2 described in the present application is arranged around the outer peripheral edge of the straight portion 1. For example, when the straight portion 1 is a rectangular flat plate, the four sides of the straight portion 1 are connected with the first bending portion 2, and each first bending portion 2 is provided with a second bending portion 3, so that the four sides of the straight portion 1 can refract light through the second bending portion 3 to expand the light output area. Here, when the straight portion 1 is in other shapes, the first bending portion 2 can be arranged corresponding to the edge of the straight portion 1.

[0061] Based on the same inventive concept, the present application also provides a display module, including the screen cover plate 9 as described in any one of the above items, and further including:

[0062] The display panel 5, the screen cover 9 is arranged on the light emitting side of the display panel 5;

[0063] A polarizer 6 is disposed between the screen cover 9 and the display panel 5, wherein the polarizer 6, the display panel 5 and the screen cover 9 are connected via a connecting portion;

[0064] The ultra-clean film 4 is disposed on a side of the display panel 5 away from the polarizer 6 .

[0065] In some embodiments, the connection portion is a layered structure made of a high-transmittance optical adhesive material. For example, the high-transmittance optical adhesive material may be a polycarbonate material, an epoxy resin material, or a polyimide material.

[0066] In the above display module, the polarizer 6 can be a reflective polarizer, and the reflective polarizer can be a wire grid polarizer (WGP). The material of the wire grid polarizer is a white metal to improve the reflectivity of the polarizer, and the reflectivity of the polarizer can be used to improve the light transmittance of the display device. The white metal is, for example, aluminum, which not only has a high reflectivity, but also has stable properties, low hardness, good ductility, and is easy to make the wire grid polarizer; the reflective polarizer can also be a non-wire grid polarizer, such as a sheet-shaped reflective polarizer, which can also improve the light transmittance of the display device to a certain extent, but compared with this kind of reflective polarizer, when the reflective polarizer is WGP, the display device can obtain a higher light transmittance.

[0067] In the above display module, the ultra-clean film 4 is also called buffer foam. The ultra-clean film (SCF) includes a textured adhesive (EMBO) and a foam (Foam), which mainly plays a buffering role and is a conventional functional layer. The ultra-clean film can prevent impurities, dust and other pollutants in the packaging process from entering the interior of the screen, ensuring the stability and reliability of the display screen during use. At the same time, the ultra-clean film 4 can also reduce the scattering of messy light and effectively ensure the brightness of the display screen. Here, an exemplary structure of a display module is as follows Figure 5 As shown, along the light emitting direction, the display module is provided with a super clean film 4 (SuperClean Foam, SCF), a display panel 5 (Panel, PNL), a polarizer 6 (Polarizer, POL) and a screen cover 9 (CoverGlass, CG) in sequence from the inside to the outside. A BF back film layer 8 is provided between the super clean film 4 and the display panel 5, and the screen cover 9 is attached to the polarizer 6 through a high-transmittance optical adhesive layer 7.

[0068] Here, the hierarchical structure of the display module includes a bent hierarchical portion extending toward the edge, and the curvature radius of the bent hierarchical portion of each hierarchical structure is the same as the curvature radius of the first bent portion 2 and the second bent portion 3, so as to form a complete display device more accurately. For example, the display module is described below with reference to an active-matrix organic light-emitting diode (AMOLED) display module.

[0069] In some embodiments, the thickness of the straight portion 1 of the screen cover 9 is the same as that of the first bent portion 2, and the thickness of the second bent portion 3 is 0.5-2 times the thickness of the straight portion 1. Further, the thickness of the second bent portion 3 is 0.8-1.5 times the thickness of the straight portion 1. For example, the thickness of the second bent portion is 0.5 times, 0.6 times, 0.8 times, 1 times, 1.2 times, 1.5 times, 1.8 times or 2 times the thickness of the straight portion 1. Exemplarily, taking a mobile phone device as an example, in the screen cover 9 of the mobile phone device, the thickness of the straight portion is generally 0.25mm-2mm, and the thickness of the second bent portion is between 0.12mm-4mm.

[0070] In the above description, the thickness of the second bent portion 3 is set to be within the range of 0.5-2 times the thickness of the straight portion 1, which can increase the light output area without affecting the appearance and the feel of use. Preferably, the thickness of the second bent portion 3 is set to be within the range of 0.8-1.5 times the thickness of the straight portion 1, which can maximize the light output area without affecting the appearance and the feel of use.

[0071] If the thickness of the second bending portion 3 is less than 0.5 times, the thickness of the second bending portion 3 is too thin. At this time, the refraction angle of the emitted light actually emitted through the second bending portion 3 is small, and the light-emitting area of ​​the screen cover 9 cannot be significantly increased; if the thickness of the second bending portion 3 is more than 2 times, the thickness of the second bending portion 3 at the first bending portion 2 will be too thick. At this time, the second bending portion 3 protrudes toward the light-emitting side relative to the first bending portion 2, causing the screen cover 9 to have obvious protruding bending edges, affecting the actual feel and comfort. Setting the thickness of the second bending portion 3 within the specified range can ensure the light-emitting area without affecting the appearance and feel of use.

[0072] Here, the present application also provides a calculation method for determining the emission range of the emitted light in the area outside the straight portion 1, which is as follows:

[0073] like Figure 4 As shown, when the screen cover 9 in the related technical solution is a combination structure of a straight portion 1 with uniform wall thickness and a first bent portion 2, the screen cover 9 is an ordinary curved cover, and the incident light F1 at the edge is refracted through point A, F4 is the normal through point A, and the equivalent refraction angle δ is calculated. The path of the outgoing light F3 is calculated by the equivalent refraction angle δ, and the outgoing light F3 is emitted from the screen cover 9 through point C on the first bent portion 2. Here, Figure 4 The horizontal distance between point A and point C is the light-emitting area width H increased by the first bending portion 2, and the screen-to-body ratio that can be increased by setting the first bending portion 2 can be calculated based on the light-emitting area width.

[0074] like Figure 5As shown, when the screen cover 9 described in the present application is used, the screen cover 9 is a combination structure of a straight portion 1 with uniform wall thickness, a first bent portion 2 and a second bent portion 3. The dotted arc portion in the figure is the original first bent portion 2. The same incident light F1 located at the edge is refracted through point A, F4 is the normal through point A, and the incident angle α is measured. The equivalent refraction angle δ is calculated based on the principle of light refraction. The path of the outgoing light F2 is calculated based on the equivalent refraction angle δ. The outgoing light F2 is emitted from the screen cover 9 through point B on the second bent portion 3. Here, Figure 5 The horizontal distance between point B and point C is the light-emitting area width h increased after adding the second bending portion 3 compared with the related technical solution. The light-emitting area width h can be used to calculate the screen-to-body ratio that can be increased by setting the second bending portion 3.

[0075] In the above description, if Figure 6 As shown, since the refraction angle of the incident light varies very little between the hierarchical structures, in the actual calculation process, the bent hierarchical parts of each hierarchical structure can be approximately equivalent to the plane hierarchical parts. Therefore, the equivalent refraction angle δ can be obtained by the ratio of the total horizontal refraction distance to the total thickness of each hierarchical structure.

[0076] Specifically, Figure 6 The dashed line in the middle is the light propagation path when it is approximately equivalent to the plane level, and the solid line is the actual light propagation refraction path. Figure 6 In the figure, the incident angle is α, the refraction angle of the incident light F1 when it enters the polarizer 6 from the display panel 5 is β, the refraction angle of the incident light F1 when it enters the optical adhesive layer 7 from the polarizer 6 is γ, and the refraction angle of the incident light F1 when it enters the screen cover 9 from the optical adhesive layer 7 is θ. When the bent level parts of each hierarchical structure are approximately equivalent to a plane level, the equivalent refraction angle of the screen cover 9, the optical adhesive layer 7 and the polarizer 6 is δ.

[0077] In addition, the refractive index n1 of the polarizer 6, the refractive index n2 of the optical adhesive layer 7 and the refractive index n3 of the screen cover 9 are obtained respectively, and the refractive index n21 of the optical adhesive layer 7 relative to the polarizer 6 and the refractive index n32 of the screen cover 9 relative to the optical adhesive layer 7 are obtained by calculation.

[0078] Compared with the related technical solutions, when the incident angle α is the same, a reference value can be taken and the equivalent refraction angle δ can be calculated by the following formula:

[0079] x1=T POL *tanβ

[0080] x2=T OCA *tanγ

[0081] x3=T CG *tanθ

[0082]

[0083] tanδ=(x1+x2+x3) / (T POL +T OCA +T CG )

[0084] In the above formula, T POL is the thickness of polarizer 6, T OCA is the thickness of the optical adhesive layer 7; T CG is the thickness of the screen cover 9, x3 is the horizontal refraction distance when the incident light F1 enters the polarizer 6 from the display panel 5; x2 is the horizontal refraction distance when the incident light F1 enters the optical adhesive layer 7 from the polarizer 6; x1 is the horizontal refraction distance when the incident light F1 enters the screen cover 9 from the optical adhesive layer 7. Here, the horizontal refraction distance is the maximum horizontal distance between the refracted light and the normal line.

[0085] In the above calculation process, at T POL and T OCA Under the premise of a certain thickness, x1, x2 and x3 keep a certain value, the greater the thickness of the bent part of the screen cover 9, the greater the T CG The larger it is, the smaller the equivalent refraction angle δ finally calculated is. When the equivalent refraction angle δ is smaller, the actual emitted light F2 is closer to the edge area of ​​the screen cover 9, thereby increasing the light emitting area.

[0086] It can be concluded from the above calculation process that when the incident angle α is the same, the additional thickness of the second bending portion can make the outgoing light F2 more biased towards the edge area than the outgoing light F3 of the related technical solution, thereby effectively increasing the area of ​​the light-emitting area and further improving the screen-to-body ratio of the screen cover 9.

[0087] Based on the same inventive concept, the present application also provides a display device, including a display panel as described in any of the above embodiments. Here, the display device can be a product with an image display function, such as: a display, a television, a billboard, a digital photo frame, a laser printer with a display function, a telephone, a mobile phone, a personal digital assistant (PDA), a digital camera, a portable camcorder, a viewfinder, a navigator, a vehicle, a large-area wall, a home appliance, an information query device (such as business query equipment and monitors of e-government, banks, hospitals, power and other departments).

[0088] It should be noted that the above describes some embodiments of the present application. Other embodiments are within the scope of the appended claims. In some cases, the actions or steps recorded in the claims can be performed in an order different from that in the above embodiments and still achieve the desired results. In addition, the processes depicted in the accompanying drawings do not necessarily require the specific order or continuous order shown to achieve the desired results. In some embodiments, multitasking and parallel processing are also possible or may be advantageous.

[0089] Those skilled in the art should understand that the discussion of any of the above embodiments is merely illustrative and is not intended to imply that the scope of the present application (including the claims) is limited to these examples. In line with the concept of the present application, the technical features in the above embodiments or different embodiments may be combined, the steps may be implemented in any order, and there are many other variations of the different aspects of the embodiments of the present application as described above, which are not provided in detail for the sake of simplicity.

[0090] In addition, to simplify the description and discussion, and in order not to make the embodiments of the present application difficult to understand, the known power supply / ground connection with the integrated circuit (IC) chip and other components may or may not be shown in the provided drawings. In addition, the device can be shown in the form of a block diagram to avoid making the embodiments of the present application difficult to understand, and this also takes into account the fact that the details of the implementation of these block diagram devices are highly dependent on the platform to be implemented in the embodiments of the present application (that is, these details should be fully within the scope of understanding of those skilled in the art). In the case of elaborating specific details (e.g., circuits) to describe exemplary embodiments of the present application, it is obvious to those skilled in the art that the embodiments of the present application can be implemented without these specific details or when these specific details are changed. Therefore, these descriptions should be considered to be illustrative rather than restrictive.

[0091] Although the present application has been described in conjunction with specific embodiments of the present application, many replacements, modifications and variations of these embodiments will be apparent to those skilled in the art from the foregoing description. For example, other memory architectures (e.g., dynamic RAM (DRAM)) may use the embodiments discussed.

[0092] The embodiments of the present application are intended to cover all such substitutions, modifications and variations that fall within the broad scope of the appended claims. Therefore, any omissions, modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the embodiments of the present application should be included in the scope of protection of the present application.

Claims

1. A screen cover, characterized in that: include: The cover plate body comprises a straight portion and a first bent portion connected to a side of the straight portion, wherein the straight portion has an inner surface and an outer surface disposed opposite to each other, and the first bent portion protrudes in a direction away from the outer surface; The second bending portion is arranged on a side of the first bending portion close to the outer surface, with the direction away from the outer surface as the positive direction, and the distance value between the surface of the second bending portion away from the first bending portion and the outer surface is a non-negative number.

2. The screen cover according to claim 1, characterized in that: The projection of the first bent portion on the plane where the straight portion is located is located within the projection of the second bent portion on the plane where the straight portion is located.

3. The screen cover according to claim 2, characterized in that: The second bending portion includes a first transition surface connected to the outer surface, and an outer arc surface connected to the first transition surface, and the first transition surface and the outer surface are located on the same plane.

4. The screen cover according to claim 3, characterized in that: The curvature radius of the outer arc surface is the same as the curvature radius of the first bending portion.

5. The screen cover according to claim 3, characterized in that: The second bending portion further includes a second transition surface, one end of the second transition surface is connected to the outer arc surface, and the other end of the second transition surface is connected to the extended end of the first bending portion.

6. The screen cover according to claim 5, characterized in that: Along a direction away from the outer surface, a distance between the second transition surface and a surface of the first bending portion close to the second bending portion gradually decreases.

7. The screen cover according to claim 6, characterized in that: The second transition surface is perpendicular to the outer surface.

8. The screen cover according to claim 1, characterized in that: The first bending portion is arranged around the outer peripheral edge of the straight portion.

9. The screen cover according to any one of claims 1 to 8, characterized in that: The straight portion, the first bent portion and the second bent portion are integrally formed.

10. A display module, characterized in that: The screen cover according to any one of claims 1 to 9 further comprises: A display panel, wherein the screen cover is arranged on the light emitting side of the display panel; A polarizer is disposed between the screen cover and the display panel, wherein the polarizer, the display panel and the screen cover are connected via a connecting portion; The ultra-clean film is arranged on a side of the display panel away from the polarizer.

11. A display device, characterized in that: Includes the display module described in claim 10.

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