Display module and electronic equipment

Abstract

The invention discloses a display module and electronic equipment, and belongs to the field of electronic equipment.The display module comprises a display layer, a cover plate, an optical hard layer and a protective layer, the cover plate, the optical hard layer and the protective layer are sequentially stacked on the surface of the display layer, the protective layer comprises a diamond-like carbon film layer, and the diamond-like carbon film layer is arranged on the surface of the display layer. The optical hard layer comprises a silicon oxide film layer and a silicon nitride film layer which are mutually stacked.

Description

Technical Field

[0001] The present application belongs to the technical field of electronic equipment, and specifically relates to a display module and an electronic equipment. Background Art

[0002] Mobile phones and other electronic devices have become indispensable devices in people's work and life because they bring many conveniences to users. Display screens are extremely important components in electronic devices. In current electronic devices, the display screens are basically touch screens. Therefore, during the use of electronic devices, the display screens will inevitably come into contact and rub against the user's fingers or stylus, which will cause the cover of the display screen to be easily scratched, which will greatly reduce the display effect of the display screen. Summary of the invention

[0003] The purpose of the embodiments of the present application is to provide a display module and an electronic device to solve the problem that the current display module has relatively weak anti-friction ability and that long-term use may cause the cover plate of the display screen to be scratched, thereby affecting the display effect.

[0004] In a first aspect, an embodiment of the present application discloses a display module, which includes a display layer, a cover plate, an optical hard layer and a protective layer, wherein the cover plate, the optical hard layer and the protective layer are sequentially stacked on the surface of the display layer, the protective layer includes a diamond-like film layer, and the optical hard layer includes a silicon oxide film layer and a silicon nitride film layer stacked on each other.

[0005] In a second aspect, an embodiment of the present application discloses an electronic device, which includes a housing and the above-mentioned display module.

[0006] The embodiment of the present application discloses a display module, which includes a display layer, and a cover plate, an optical hard layer and a protective layer stacked on the surface of the display layer in sequence, wherein the protective layer includes a diamond-like film layer, which has strong anti-friction ability and hardness, and at the same time, the optical hard layer includes a silicon oxide film layer and a silicon nitride film layer stacked on each other, which makes the optical hard layer also have strong hardness and corrosion resistance, so that the protective layer and the optical hard layer can provide the cover plate with good scratch resistance, and then after long-term use, the scratch degree of the cover plate can also be ensured to be relatively low, so as to ensure that the display module still has a good display effect. At the same time, the protective layer and the optical hard layer also have good optical properties, so as to ensure that the transmittance of the light emitted by the display layer is relatively high, and by designing the parameters such as the thickness of the silicon oxide film layer and the silicon nitride film layer, the optical hard layer can also reduce the reflectivity of the display module, thereby further improving the display effect of the display module. BRIEF DESCRIPTION OF THE DRAWINGS

[0007] The drawings described herein are used to provide a further understanding of the present application and constitute a part of the present application. The illustrative embodiments of the present application and their descriptions are used to explain the present application and do not constitute an improper limitation on the present application. In the drawings: Figure 1 A schematic diagram of the structure of a display module disclosed in an embodiment of the present application; Figure 2 A schematic diagram of another structure of a display module disclosed in an embodiment of the present application; Figure 3 A schematic diagram of the structure of an optical hard layer in a display module disclosed in an embodiment of the present application; Figure 4 It is a schematic diagram of the structure of the optical flexible layer in the display module disclosed in the embodiment of the present application.

[0008] Reference numerals: 100-display layer, 200-cover plate, 301-silicon oxide film layer, 302-silicon nitride film layer, 303-lanthanum titanate film layer, 310-optical hard layer, 320-optical soft layer, 400-protective layer, 510-first buffer layer, 520-second buffer layer, 600-anti-fingerprint layer, 700-adhesive layer. DETAILED DESCRIPTION

[0009] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0010] The terms "first", "second", etc. in the specification and claims of the present application are used to distinguish similar objects, and are not used to describe a specific order or sequence. It should be understood that the data used in this way can be interchangeable under appropriate circumstances, so that the embodiments of the present application can be implemented in an order other than those illustrated or described here, and the objects distinguished by "first", "second", etc. are generally of one type, and the number of objects is not limited. For example, the first object can be one or more. In addition, "and / or" in the specification and claims represents at least one of the connected objects, and the character " / " generally indicates that the objects associated with each other are in an "or" relationship.

[0011] The present application embodiment discloses a display module, which can be applied to electronic devices such as mobile phones. Figure 1As shown, the display module includes a display layer 100 and a cover plate 200, wherein the display layer 100 is used to provide a display function, and the cover plate 200 is stacked on the surface of the display layer 100 so that the cover plate 200 can provide a certain protection for the display layer 100. Generally, the cover plate 200 can be formed of glass material, or the cover plate 200 can also be formed of plastic, which enables the cover plate 200 to have a deformation ability, so that the entire display module also has a bending and deformation ability, making it flexible. In addition, the display module can also generally include a touch layer to enable the display module to have a touch function. Of course, in this case, the display module will inevitably frequently contact and rub with a stylus or a user's finger, etc. As the use time increases, it is easy to cause the cover plate 200 to be scratched and damaged, thereby having a great adverse effect on the display effect of the display module.

[0012] In view of the above situation, the display module disclosed in the embodiment of the present application also includes a protective layer 400, and the protective layer 400 is arranged on the surface of the side of the cover plate 200 away from the display layer 100, so as to protect the cover plate 200 with the protective layer 400. Of course, in order to ensure that the protective layer 400 has high wear resistance and hardness, in the embodiment of the present application, the protective layer 400 includes a diamond-like film layer, and the diamond-like film layer is formed of a diamond-like material, which can be formed by magnetron sputtering to form a thin film of the material, that is, a diamond-like film. This structure has high hardness and resistivity, and has good optical properties and excellent tribological properties. More specifically, in the embodiment of the present application, the thickness of the protective layer 400 is between 5 and 20 nm.

[0013] Diamond-like carbon material is a kind of amorphous carbon material, which is a metastable form of amorphous carbon formed by the hybridization of carbon atoms through sp2 and sp3 bonds. Among them, carbon atoms are hybridized with sp2, which means that one 1s orbital and two 2p orbitals of carbon atoms are recombined to form three new equal-energy orbitals, namely sp2 hybrid orbitals. These three orbitals are arranged in a planar triangle in space and form σ bonds with adjacent carbon atoms. In addition, each carbon atom has a remaining 2p orbital that is not involved in hybridization. There is an unpaired electron on this orbital, which can form a π bond with the unpaired electron of the adjacent carbon atom.

[0014] The sp3 hybridization of carbon atoms refers to the recombination of a 1s orbital and three 2p orbitals of carbon atoms to form four new equal-energy orbitals, namely sp3 hybrid orbitals. These four orbitals are arranged tetrahedrally in space, each orbital contains one electron and points to four adjacent atoms, thus forming a stable covalent bond.

[0015] In diamond-like materials, their high hardness and stability are mainly attributed to the tetrahedral structure formed by SP3 hybridization, which makes each carbon atom closely connected with the four surrounding carbon atoms to form a very stable three-dimensional network structure.

[0016] Moreover, in diamond-like materials, carbon atoms SP2 and SP3 hybridization exist simultaneously, forming a mixed hybrid structure. This structure makes the diamond-like film have the characteristics of high hardness and high wear resistance of diamond, and the characteristics of good lubricity and conductivity of graphite.

[0017] In the embodiment of the present application, in the diamond-like film layer used, carbon atoms are mainly SP3 hybridized, but also include a certain proportion of SP2 hybridized carbon atoms. More specifically, by adjusting the ratio of SP2 and SP3 hybridization of carbon atoms and the growth mechanism of the diamond-like film layer, the total Sp3 hybridized carbon atom content of the diamond-like film layer can be made above 70%, which makes the Mohs hardness of the diamond-like film layer relatively high, which can reach above 7, thereby greatly improving the surface scratch resistance of the cover plate 200.

[0018] In order to further improve the anti-scratch ability of the display module and improve the transmittance of the display module, the display module disclosed in the embodiment of the present application also includes an optical hard layer 310, which is sandwiched between the cover plate 200 and the protective layer 400, that is, in the embodiment of the present application, the protective layer 400, the optical hard layer 310 and the cover plate 200 are sequentially stacked on the surface of the display layer 100. At the same time, the optical hard layer 310 includes a silicon oxide film layer 301 and a silicon nitride film layer 302, and the two are stacked, the silicon oxide film layer 301 is formed of silicon dioxide, and the silicon nitride film layer 302 is formed of silicon nitride, and the silicon oxide film layer 301 and the silicon nitride film layer 302 can be formed by vapor deposition coating. More specifically, the thickness of the optical hard layer 310 is between 400 and 1000 nm, so as to ensure that it has good optical properties while not having a significant adverse effect on the overall thickness of the display module.

[0019] Among them, silicon oxide and silicon nitride both have good optical properties, and at the same time, both have relatively high hardness and corrosion resistance, and the film materials formed by silicon oxide and silicon nitride are relatively dense and relatively good in self-lubricity, which can further improve the scratch resistance of the cover plate 200. In addition, in the processing of the optical hard layer 310, by controlling the thickness and other parameters of the silicon oxide film layer 301 and the silicon nitride film layer 302, based on the interference effect, the co-location interference can be enhanced and the out-of-phase interference can be eliminated, so that the light waves generate multi-beam interference in the optical hard layer 310, and the surface of the optical hard layer 310 away from the cover plate 200 is destructively interfered, and the surface of the optical hard layer 310 close to the cover plate 200 is constructively interfered, so as to ensure that the transmittance of the formed optical hard layer 310 is relatively higher and the reflectivity of the optical hard layer 310 is reduced.

[0020] The embodiment of the present application discloses a display module, which includes a display layer 100, and a cover plate 200, an optical hard layer 310 and a protective layer 400 which are sequentially stacked on the surface of the display layer 100, wherein the protective layer 400 includes a diamond-like film layer, which has strong anti-friction ability and hardness. At the same time, the optical hard layer 310 includes a silicon oxide film layer 301 and a silicon nitride film layer 302 stacked on each other, which makes the optical hard layer 310 also have strong hardness and corrosion resistance, so that the protective layer 400 and the optical hard layer 310 can provide the cover plate 200 with good scratch resistance, and further after long-term use, it can also ensure that the scratch degree of the cover plate 200 is relatively low, so as to ensure that the display module still has a good display effect. At the same time, the protective layer 400 and the optical hard layer 310 also have good optical properties, thereby ensuring that the transmittance of the light emitted by the display layer 100 is relatively high. Moreover, by designing parameters such as the thickness of the silicon oxide film layer 301 and the silicon nitride film layer 302, the optical hard layer 310 can also reduce the reflectivity of the display module, thereby further improving the display effect of the display module.

[0021] In order to further improve the display effect of the display module, optionally, Figure 2 and Figure 4 As shown, the display module further includes an optical soft layer 320, which is sandwiched between the cover plate 200 and the display layer 100 to provide an optical effect from the other side of the cover plate 200, so that the display effect of the display layer 100 is further improved. The optical soft layer 320 includes a silicon oxide film layer 301, which has good optical effect and hardness as described above, and further, the optical soft layer 320 can also provide protection for the display layer 100 to a certain extent. More specifically, the thickness of the optical soft layer 320 can be between 400 and 1000 nm.

[0022] At the same time, since the optical soft layer 320 is located on the inner side of the cover plate 200, in order to reduce costs and prevent the display layer 100 from being damaged during the processing of the optical soft layer 320, in the embodiment of the present application, unlike the optical hard layer 310, the optical soft layer 320 also includes a lanthanum titanate film layer 303, and the lanthanum titanate film layer 303 and the silicon oxide film layer 301 are stacked with each other, and the lanthanum titanate film layer 303 is formed of lanthanum titanate, and the lanthanum titanate film layer 303 can be formed by vapor deposition coating. It should be noted that in the display module disclosed in the embodiment of the present application, the optical hard layer 310 and the optical soft layer 320 are relative concepts, that is, relatively speaking, the hardness of the optical hard layer 310 is greater than the hardness of the optical soft layer 320.

[0023] Among them, lanthanum titanate is similar to silicon nitride in that both have good optical effects and a relatively high refractive index. However, unlike silicon nitride, on the one hand, lanthanum titanate has a relatively low cost, and on the other hand, its hardness is relatively low, which makes the entire optical soft layer 320 relatively softer than the optical hard layer 310, thereby making the processing yield of the optical soft layer 320 relatively high, and the optical soft layer 320 can also absorb the internal stress generated during the assembly process of the cover plate 200 and the display layer 100 to a certain extent.

[0024] As described above, compared with the silicon oxide film layer 301, the refractive index of the lanthanum titanate film layer 303 is relatively strong. Furthermore, in order to maximize the utilization rate of the light emitted by the display layer 100, in the embodiment of the present application, the film layers in the optical soft layer 320 close to the cover plate 200 and the display layer 100 can all be silicon oxide film layers 301.

[0025] Furthermore, in a specific embodiment of the present application, in order to make the overall optical effect of the optical flexible layer 320 relatively good and reduce the difficulty of processing the optical flexible layer 320, in a specific embodiment of the present application, the thickness of each silicon oxide film layer 301 and each lanthanum titanate film layer 303 can be made relatively small to reduce the difficulty of processing the entire optical flexible layer 320. At the same time, by making the number of silicon oxide film layers 301 and lanthanum titanate film layers 303 at least 2, the formed optical flexible layer 320 can further reduce the reflectivity of the optical flexible layer 320 and improve its transmittance by correspondingly controlling parameters such as the thickness of each silicon oxide film layer 301 and lanthanum titanate film layer 303.

[0026] In a specific embodiment of the present application, the optical soft layer 320 may include four silicon oxide film layers 301 and three lanthanum titanate film layers 303, and the silicon oxide film layers 301 and the lanthanum titanate film layers 303 are alternately stacked. At the same time, in the optical soft layer 320, the thickness ranges of the four silicon oxide film layers 301 gradually away from the cover plate 200 may be 60-90nm, 5-15nm, 5-12nm and 15-25nm, respectively, and correspondingly, the thickness ranges of the three lanthanum titanate film layers 303 gradually away from the cover plate 200 may be 45-75nm, 20-30nm and 12-25nm, respectively.

[0027] More specifically, in a specific embodiment of the present application, the thicknesses of the four silicon oxide film layers 301 gradually moving away from the cover plate 200 are 75 nm, 10 nm, 8 nm and 20 nm respectively. Correspondingly, the thicknesses of the three silicon nitride film layers 302 gradually moving away from the cover plate 200 can be 60 nm, 25 nm and 17 nm respectively. This can ensure that the optical soft layer 320 has the characteristics of high transmittance and low reflectivity, and the processing difficulty is relatively low.

[0028] As described above, the optical hard layer 310 includes a silicon oxide film layer 301 and a silicon nitride film layer 302 stacked on each other, wherein, relatively speaking, the refractive index of the silicon oxide film layer 301 is relatively low, and the refractive index of the silicon nitride film layer 302 is relatively high. Based on this, in order to maximize the utilization rate of light in the display layer 100, in the embodiment of the present application, Figure 2 and Figure 3 As shown, the film layers in the optical hard layer 310 close to the cover plate 200 and the protective layer 400 can be all silicon oxide film layers 301. That is, the outermost film layers in the optical hard layer 310 are all silicon oxide film layers 301, and one of the two silicon oxide film layers 301 can be bonded to the cover plate 200, and the other can be bonded to the protective layer 400, so that the light emitted by the display layer 100 can continue to be incident on the silicon nitride film layer 302 as much as possible after passing through the cover plate 200 and incident on the silicon oxide film layer 301 in the optical hard layer 310 close to the cover plate 200.

[0029] In order to ensure that the optical hard layer 310 has relatively good optical effects and scratch resistance while minimizing the difficulty of processing the optical hard layer 310, in a specific embodiment of the present application, the thickness of each silicon oxide film layer 301 and each silicon nitride film layer 302 can be made relatively small to reduce the difficulty of processing the entire optical hard layer 310. At the same time, by making the number of silicon oxide film layers 301 and silicon nitride film layers 302 at least 2, the formed optical hard layer 310 can further reduce the reflectivity of the optical hard layer 310 and improve its transmittance by correspondingly controlling parameters such as the thickness of each silicon oxide film layer 301 and silicon nitride film layer 302.

[0030] In a specific embodiment of the present application, the optical hard layer 310 may include four silicon oxide film layers 301 and three silicon nitride film layers 302, and the silicon oxide film layers 301 and the silicon nitride film layers 302 are alternately stacked. At the same time, in the optical hard layer 310, the thickness ranges of the four silicon oxide film layers 301 gradually away from the protective layer 400 may be 10-20nm, 45-55nm, 20-30nm and 90-120nm, respectively, and correspondingly, the thickness ranges of the three silicon nitride film layers 302 gradually away from the protective layer 400 may be 15-20nm, 40-60nm and 45-60nm, respectively.

[0031] More specifically, in a specific embodiment of the present application, the thicknesses of the four silicon oxide film layers 301 gradually away from the protective layer 400 are 15nm, 49nm, 25nm and 103nm respectively. Correspondingly, the thicknesses of the three silicon nitride film layers 302 gradually away from the protective layer 400 can be 17nm, 50nm and 52nm respectively. This can ensure that the optical hard layer 310 has good scratch resistance and has the characteristics of high transmittance and low reflectivity.

[0032] As described above, the optical hard layer 310 is a hard structure as a whole, and in the processing of the optical hard layer 310, it is usually formed by magnetron sputtering or the like. Therefore, in the processing of the optical hard layer 310, the stress on the cover plate 200 is relatively large, which easily causes the cover plate 200 to be deformed by force, thereby having a greater adverse effect on the yield of the display module. To this end, further, the display module disclosed in the embodiment of the present application also includes a first buffer layer 510, which is a resin structural member, which is flexible and soft as a whole, and can buffer the stress generated in the process of forming the optical hard layer 310. Of course, in the case where the display module includes the first buffer layer 510, it can also provide a buffering effect for the processing of the protective layer 400 to a certain extent, thereby reducing the stress on the cover plate 200 and improving the yield of the display module. More specifically, the thickness of the first buffer layer 510 can be between 1 and 2 um to ensure that the first buffer layer 510 has a relatively good buffering and stress relief capability.

[0033] More specifically, the first buffer layer 510 is formed of an organic silicon material, which is transparent and invisible. At the same time, it has a smooth, flat and translucent texture, and will not produce rainbow patterns when light is reflected. It can enhance the stress resistance of the cover plate 200 and prevent the internal stress generated during the processing of the optical hard layer 310 and the protective layer 400 from damaging the cover plate 200.

[0034] As described above, although the hardness of the optical soft layer 320 is lower than that of the optical hard layer 310, the hardness of the silicon oxide film layer 301 is still relatively large. Therefore, the optical soft layer 320 also has a certain hardness. In order to further reduce the internal stress of the cover plate 200, the display module disclosed in the embodiment of the present application also includes a second buffer layer 520. The second buffer layer 520 is a resin structure, which is flexible and soft as a whole. This can further buffer the stress of the optical hard layer 310 and the protective layer 400 on the cover plate 200. More specifically, the thickness of the second buffer layer 520 can be between 1 and 2 um to ensure that the second buffer layer 520 has relatively good buffering and stress relief capabilities. More specifically, similar to the first buffer layer 510, the second buffer layer 520 can also be formed of an organic silicon material.

[0035] Of course, during the processing of the display module, the display layer 100 and the optical flexible layer 320 can be bonded together by optical adhesive, and the optical adhesive forms an adhesive layer 700 to ensure that the optical flexible layer 320 can form a good assembly relationship with the cover plate 200 .

[0036] Furthermore, in order to improve the anti-fingerprint capability of the display module, an anti-fingerprint layer 600 may be provided outside the protective layer 400, that is, on the surface of the protective layer 400 facing away from the display layer 100. The anti-fingerprint layer 600 is formed of a fluorine-containing material and has good hydrophobic and oleophobic capabilities, thereby making the stain adhesion on the outer surface of the display module poor and making the display module easier to clean. Specifically, the thickness of the anti-fingerprint layer 600 may be between 10 and 20 nm.

[0037] Based on the display module disclosed in any of the above embodiments, the present application also discloses an electronic device, which includes a housing and any of the above display modules, and the display module is installed on the housing. Of course, the electronic device may also include other devices such as batteries, which will not be introduced one by one here for the sake of brevity of the text.

[0038] It should be noted that, in this article, the terms "comprise", "include" or any other variant thereof are intended to cover non-exclusive inclusion, so that the process, method, article or device including a series of elements includes not only those elements, but also includes other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprise one..." do not exclude the presence of other identical elements in the process, method, article or device including the element. In addition, it should be pointed out that the scope of the methods and devices in the embodiments of the present application is not limited to performing functions in the order shown or discussed, and may also include performing functions in a substantially simultaneous manner or in reverse order according to the functions involved, for example, the described method may be performed in an order different from that described, and various steps may also be added, omitted, or combined. In addition, the features described with reference to certain examples may be combined in other examples.

[0039] The embodiments of the present application are described above in conjunction with the accompanying drawings, but the present application is not limited to the above-mentioned specific implementation methods. The above-mentioned specific implementation methods are merely illustrative and not restrictive. Under the guidance of the present application, ordinary technicians in this field can also make many forms without departing from the purpose of the present application and the scope of protection of the claims, all of which are within the protection of the present application.

Claims

1. A display module, characterized in that: The invention comprises a display layer (100), a cover plate (200), an optical hard layer (310) and a protective layer (400), wherein the cover plate (200), the optical hard layer (310) and the protective layer (400) are sequentially stacked on the surface of the display layer (100), the protective layer (400) comprises a diamond-like carbon film layer, and the optical hard layer (310) comprises a silicon oxide film layer (301) and a silicon nitride film layer (302) stacked on each other.

2. The display module according to claim 1, characterized in that: It also comprises an optical soft layer (320), the optical soft layer (320) being sandwiched between the cover plate (200) and the display layer (100), the optical soft layer (320) comprising a silicon oxide film layer (301) and a lanthanum titanate film layer (303) stacked on top of each other.

3. The display module according to claim 2, characterized in that: The film layers in the optical soft layer (320) close to the cover plate (200) and the display layer (100) are all the silicon oxide film layers (301).

4. The display module according to claim 3, characterized in that: The film layers in the optical hard layer (310) close to the cover plate (200) and the protective layer (400) are all the silicon oxide film layers (301).

5. The display module according to claim 4, characterized in that: In the optical hard layer (310), the number of the silicon oxide film layer (301) and the number of the silicon nitride film layer (302) are both at least 2; In the optical soft layer (320), the number of the silicon oxide film layer (301) and the number of the lanthanum titanate film layer (303) are both at least 2.

6. The display module according to claim 2, characterized in that: It also comprises a first buffer layer (510), wherein the first buffer layer (510) is sandwiched between the optical hard layer (310) and the cover plate (200), and the first buffer layer (510) is a resin structural component.

7. The display module according to claim 6, characterized in that: It also comprises a second buffer layer (520), wherein the second buffer layer (520) is sandwiched between the optical soft layer (320) and the cover plate (200), and the second buffer layer (520) is a resin structural component.

8. The display module according to claim 2, characterized in that: An anti-fingerprint layer (600) is also provided on a surface of the protection layer (400) facing away from the display layer (100).

9. The display module according to claim 8, characterized in that: The thickness of the optical hard layer (310) and the optical soft layer (320) is between 400-1000 nm; the thickness of the protective layer (400) is between 5-20 nm; and the thickness of the anti-fingerprint layer (600) is between 10-20 nm.

10. An electronic device, characterized in that: It comprises a housing and the display module according to any one of claims 1 to 9.

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