Hidden display cover plate, preparation method and application thereof and hidden display device

Abstract

The invention relates to the technical field of display devices, in particular to a hidden display cover plate, a preparation method and application thereof and a display device. The invention provides a hidden display cover plate. The hidden display cover plate comprises a glass substrate, a gloss oil layer, a texture layer, a reflecting layer and a shading layer which are sequentially stacked, the surface of the glass substrate is divided into an outer side surface and an inner side surface; concave-convex textures are arranged on the surface of the outer side of the glass substrate; the inner side surface of the glass substrate is attached to the gloss oil layer; the shading layer is attached to the periphery of the surface of the reflecting layer. The hidden display cover plate solves the problems of low pencil hardness, poor scratch resistance and unobvious concave-convex hand feeling caused by attaching a wood grain film on the surface of a glass substrate in a traditional process, the surface pencil hardness of the hidden display cover plate is larger than or equal to 9H at 750g, concave-convex textures are directly made on glass, the textures can coincide with the glass according to the ratio of 1: 1, and the hidden display cover plate has the advantages of being simple in structure and convenient to use. The problem that white edges are exposed when the wood grain film and the glass cover plate are attached according to the ratio of 1: 1 in the traditional process is solved.

Description

Technical Field

[0001] The present invention relates to the technical field of display devices, and particularly relates to a hidden display cover plate, a preparation method and application thereof, and a hidden display device. Background Art

[0002] With the improvement of the intelligence of display screens, the hidden display technology known as "intelligent skin" has gradually been applied to various products. At present, most of the surface window cover plates of display screens of electronic products such as mobile phones, tablet computers, and smart watches have been processed by hidden display. In order to achieve an integrated design, a display device with a sense of fashion, technology, and clear display has been created. The traditional process is to attach a wood grain film to the surface of a glass cover plate (as shown in Figure 3 ), but the surface pencil hardness of the wood grain film is low (about 3H@500g), the scratch resistance is poor, and the concave and convex feel is not obvious. In addition, the cost of the film material is also expensive. Summary of the Invention

[0003] In view of this, the purpose of the present invention is to provide a hidden display cover plate, a preparation method and application thereof, and a display device. The hidden display cover plate has a high pencil hardness and low cost.

[0004] In order to achieve the above-mentioned invention purpose, the present invention provides the following technical solutions:

[0005] The present invention provides a hidden display cover plate, which includes a glass substrate, a varnish layer, a texture layer, a reflection layer, and a light-shielding layer that are sequentially stacked;

[0006] The surface of the glass substrate is divided into an outer surface and an inner surface;

[0007] The outer surface of the glass substrate is an uneven texture;

[0008] The inner surface of the glass substrate is bonded to the varnish layer;

[0009] The light-shielding layer is bonded to the outer periphery of the surface of the reflection layer.

[0010] Preferably, the depth of the uneven texture is 8-20 μm.

[0011] Preferably, the thickness of the varnish layer is 5-10 μm;

[0012] Calculated by mass percentage, the varnish layer includes the following components: 25%-60% of polyester resin, 30%-65% of isophorone, 2%-4% of additives, and 4%-7% of fillers.

[0013] Preferably, the thickness of the texture layer is 30-80 μm;

[0014] By mass percentage, the texture layer comprises the following components: 15% - 30% of tetrahydrofurfuryl acrylate, 5% - 45% of acrylate monomer, 1.5% - 25% of trimethylolpropane formal acrylate, 1.0% - 5.0% of acrylate oligomer, 1.0% - 20% of photoinitiator, 0.5% - 3% of photosensitizer, 0.5% - 2% of surfactant, and 2.0% - 10% of pigment.

[0015] Preferably, the thickness of the reflective layer is 6 - 15 μm;

[0016] By mass percentage, the reflective layer comprises the following components: 25% - 60% of polyester resin, 30% - 65% of isophorone, 2% - 4% of auxiliary, 4% - 7% of filler, and 1% - 10% of pigment.

[0017] Preferably, the area where the light-shielding layer is peripherally attached to the surface of the reflective layer accounts for 3% - 95% of the area of the reflective layer;

[0018] The light-shielding layer is a black ink layer.

[0019] The present invention also provides a preparation method of the hidden display cover plate according to the above technical solution, comprising the following steps:

[0020] Etch the outer surface of the glass substrate to obtain a glass substrate with an uneven texture on one surface;

[0021] Prepare a varnish layer, a texture layer, a reflective layer, and a light-shielding layer on the inner surface of the glass substrate in sequence to obtain the hidden display cover plate.

[0022] The present invention also provides an application of the hidden display cover plate according to the above technical solution or the hidden display cover plate prepared by the preparation method according to the above technical solution in a display device.

[0023] The present invention also provides a hidden display device, comprising a hidden display cover plate, a display screen, and a backlight source which are sequentially stacked;

[0024] The hidden display cover plate is the hidden display cover plate according to the above technical solution or the hidden display cover plate prepared by the preparation method according to the above technical solution;

[0025] The light-shielding layer side of the hidden display cover plate is in contact with the display screen.

[0026] Preferably, the hidden display cover plate and the display screen are bonded by a transparent optical adhesive layer.

[0027] The present invention provides a hidden display cover plate, which comprises a glass substrate, a varnish layer, a texture layer, a reflective layer and a light-shielding layer that are sequentially stacked; the surface of the glass substrate is divided into an outer surface and an inner surface; the outer surface of the glass substrate has concave-convex textures; the inner surface of the glass substrate is attached to the varnish layer; the light-shielding layer is attached to the outer periphery of the surface of the reflective layer. In the hidden display cover plate of the present invention, concave-convex textures are directly arranged on the outer surface of the glass substrate to achieve the purpose of having a concave-convex feel, solving the problems of low pencil hardness, poor scratch resistance and unclear concave-convex feel caused by attaching a wood grain film to the surface of the glass substrate in the traditional process, so that the pencil hardness of the surface of the hidden display cover plate is ≥9H@750g, and since the concave-convex textures are directly made on the glass, the textures can coincide with the glass at a ratio of 1:1, avoiding the problem of white edges showing up when the wood grain film and the glass cover plate are attached at a ratio of 1:1 in the traditional process, and further solving the problem of low yield rate. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 FIG. is a schematic structural diagram of the hidden display cover plate of the present invention, wherein 1 is the glass substrate, 2 is the varnish layer, 3 is the texture layer, 4 is the reflective layer and 5 is the light-shielding layer;

[0029] Figure 2 FIG. is a schematic structural diagram of the display device of the present invention, wherein 6 is the hidden display cover plate, 7 is the transparent optical adhesive layer, 8 is the display screen and 9 is the backlight;

[0030] Figure 3 FIG. is a schematic structural diagram of an example of a traditional display device, wherein 10 is the wood grain film, 11 is the cover plate, 12 is the transparent optical adhesive layer, 13 is the display screen and 14 is the backlight. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0031] As Figure 1 shown, the present invention provides a hidden display cover plate, which comprises a glass substrate, a varnish layer, a texture layer, a reflective layer and a light-shielding layer that are sequentially stacked;

[0032] The surface of the glass substrate is divided into an outer surface and an inner surface;

[0033] The outer surface of the glass substrate has concave-convex textures;

[0034] The inner surface of the glass substrate is attached to the varnish layer;

[0035] The light-shielding layer is attached to the outer periphery of the surface of the reflective layer.

[0036] In the present invention, the thickness of the glass substrate is preferably 0.7 to 4.0 mm. The present invention does not have any special limitation on the thickness of the glass substrate, and it can be selected according to actual needs. In the embodiment of the present invention, the thickness of the glass substrate can be 1.8 mm.

[0037] In the present invention, one side surface of the glass substrate has concave-convex textures, and the depth of the concave-convex textures is preferably 8 to 20 μm. In the embodiment of the present invention, the depth of the concave-convex textures can be 15 μm. In the present invention, if the depth of the concave-convex textures is too shallow, the sense of concavity and convexity will not be obvious; if it is too deep, the surface quality of the glass substrate will decline, specifically manifested as excessive roughness, decreased glossiness, decreased mechanical strength, impact resistance and bending resistance, and further resulting in the glass substrate being prone to cracking or generating microcracks.

[0038] In the present invention, when the hidden display cover plate is applied to an in-vehicle display device, the haze value of the glass substrate is preferably 10% to 20%. In the embodiment of the present invention, the haze value of the glass substrate can be 15%. In the present invention, if the haze value of the glass substrate is too small, light reflection cannot be effectively reduced, the anti-glare effect is insufficient, and visual comfort is affected; if the haze value is too large, light will be excessively scattered, resulting in a decrease in the transmittance of the display screen, a decrease in contrast, a blurred picture, a decrease in clarity, and causing visual fatigue.

[0039] In the present invention, the concave-convex textures on the outer surface of the glass substrate are preferably prepared by etching.

[0040] In the present invention, the preparation process of the concave-convex textures preferably includes the following steps:

[0041] After sequentially disposing a photosensitive layer and a patterned film layer on the outer surface of the glass substrate, ultraviolet exposure, development and etching are sequentially performed to obtain concave-convex textures on the outer surface of the glass substrate.

[0042] In the present invention, the preparation method of the photosensitive layer is preferably coating. The present invention does not have any special limitation on the coating method and the material thickness of the photosensitive layer, and it can be carried out by using a process well-known to those skilled in the art.

[0043] The present invention does not impose any special limitations on the pattern type and the preparation process of the patterned film layer. The pattern type set according to actual needs can be prepared by using a preparation process well-known to those skilled in the art. In the embodiments of the present invention, the preparation process of the patterned film layer can be as follows: First, design a texture pattern using AI or PS software according to actual needs; then, coat a photosensitive layer on the surface of the PET substrate, perform exposure on the photosensitive layer, and finally perform development, fixing, and drying in sequence to obtain the patterned film layer; the exposure process is to process the texture pattern into a dot matrix image through RIP, then convert it into a model that controls the laser, and then use the laser beam of a laser imagesetter to perform exposure on the photosensitive layer; the development process is to place the exposed film in an alkaline developer to dissolve the exposed photosensitive layer; the fixing process is to place the developed film in an acidic fixer to remove the unexposed photosensitive layer.

[0044] The present invention does not impose any special limitations on the conditions of the ultraviolet exposure, and those well-known to those skilled in the art can be used.

[0045] In the present invention, the development preferably uses an alkaline developer to dissolve the photosensitive layer after the ultraviolet exposure. The present invention does not impose any special limitations on the type of the alkaline developer, and those well-known to those skilled in the art can be used.

[0046] In the present invention, the etching solution used for the etching is preferably hydrofluoric acid, and the mass percentage concentration of the hydrofluoric acid is preferably 5% - 10%. The present invention does not impose any special limitations on the time and temperature of the etching, and the time and temperature well-known to those skilled in the art can be used and ensure that the etching depth is controlled within the range of 8 - 20 μm.

[0047] After the etching is completed, the present invention preferably further includes removing the photoresist, chemical polishing, CNC machining, and chemical strengthening in sequence. The present invention does not impose any special limitations on the processes of removing the photoresist, chemical polishing, CNC machining, and chemical strengthening, and the processes well-known to those skilled in the art can be used.

[0048] In the present invention, the thickness of the varnish layer is preferably 5 - 10 μm, more preferably 6 - 8 μm. In the embodiments of the present invention, the thickness of the varnish layer can be 7 μm.

[0049] In the present invention, by mass percentage, the varnish layer preferably includes the following components: polyester resin 25% - 60%, isophorone 30% - 65%, additives 2% - 4%, and fillers 4% - 7%.

[0050] By mass percentage, the varnish layer of the present invention comprises 25% - 60% of a polyester resin, preferably 30% - 55%, more preferably 45% - 50%. In an embodiment of the present invention, the mass percentage of the polyester resin may be 47%. In the present invention, the polyester resin preferably comprises a polyester acrylate resin and / or a modified polyester resin. The present invention has no special limitation on the type of the modified polyester resin, and the types well-known to those skilled in the art can be used. When the polyester resin is two or more of the above specific selections, the present invention has no special limitation on the ratio of the above specific substances, and they can be mixed in any ratio. In an embodiment of the present invention, the polyester resin may be a polyester acrylate resin.

[0051] By mass percentage, the varnish layer comprises 30% - 65% of isophorone, preferably 35% - 60%, more preferably 40% - 55%. In an embodiment of the present invention, the mass percentage of isophorone in the varnish layer may be 45%.

[0052] By mass percentage, the varnish layer comprises 2% - 4% of an additive, preferably 2.5% - 3.5%, more preferably 2.8% - 3.2%. In an embodiment of the present invention, the mass percentage of the additive in the varnish layer may be 3%.

[0053] In the present invention, the additive preferably comprises an acrylate and / or a silane coupling agent. When the additive is an acrylate and a silane coupling agent, the present invention has no special limitation on the ratio of the acrylate and the silane coupling agent, and they can be mixed in any ratio.

[0054] By mass percentage, the varnish layer comprises 4% - 7% of a filler, preferably 4.5% - 6.5%, more preferably 5% - 6%. In an embodiment of the present invention, the mass percentage of the filler in the varnish layer may be 5%.

[0055] In the present invention, the filler preferably comprises titanium dioxide.

[0056] In the present invention, the function of the varnish layer is to strengthen the adhesive layer between the texture layer and the glass substrate.

[0057] In the present invention, the thickness of the texture layer is preferably 30 - 80 μm, more preferably 30 - 40 μm. In an embodiment of the present invention, the thickness of the texture layer may be 30 μm.

[0058] By mass percentage, the texture layer of the present invention comprises 15% - 30% of tetrahydrofurfuryl acrylate, preferably 20% - 25%. In an embodiment of the present invention, the mass percentage of tetrahydrofurfuryl acrylate in the texture layer may be 25%.

[0059] By mass percentage, the texture layer of the present invention comprises 5% - 45% of acrylate monomer, preferably 10% - 40%, more preferably 20% - 38%. In the embodiments of the present invention, the mass percentage of acrylate monomer in the texture layer may be 38%.

[0060] By mass percentage, the texture layer of the present invention comprises 1.5% - 25% of trimethylolpropane formal acrylate, preferably 5% - 20%, more preferably 10% - 15%. In the embodiments of the present invention, the mass percentage of trimethylolpropane formal acrylate in the texture layer may be 15%.

[0061] By mass percentage, the texture layer of the present invention comprises 1.0% - 5.0% of acrylate oligomer, preferably 1.5% - 4.5%, more preferably 2% - 4%. In the embodiments of the present invention, the mass percentage of acrylate oligomer in the texture layer may be 4%. In the present invention, the molecular weight of the acrylate oligomer is preferably in the range of 1000 - 5000.

[0062] By mass percentage, the texture layer of the present invention comprises 1.0% - 20% of photoinitiator, preferably 5% - 15%, more preferably 8% - 12%. In the embodiments of the present invention, the mass percentage of photoinitiator in the texture layer may be 10%.

[0063] In the present invention, the photoinitiator preferably comprises diethoxyacetophenone and / or 1 - hydroxycyclohexyl phenyl ketone. When the photoinitiator is diethoxyacetophenone and 1 - hydroxycyclohexyl phenyl ketone, the present invention has no special limitation on the ratio of diethoxyacetophenone and 1 - hydroxycyclohexyl phenyl ketone, and they can be mixed in any ratio. In the embodiments of the present invention, the photoinitiator may be 1 - hydroxycyclohexyl phenyl ketone.

[0064] By mass percentage, the texture layer of the present invention comprises 0.5% - 3% of photosensitizer, preferably 1% - 2.5%, more preferably 1.5% - 2%. In the embodiments of the present invention, the mass percentage of photoinitiator in the texture layer may be 2%.

[0065] In the present invention, the photosensitizer preferably comprises benzophenone.

[0066] By mass percentage, the texture layer of the present invention comprises 0.5% - 2% of surfactant, preferably 1% - 1.5%. In the embodiments of the present invention, the mass percentage of surfactant in the texture layer may be 1%.

[0067] In the present invention, the surfactant preferably comprises fatty alcohol polyoxyethylene ether.

[0068] By mass percentage, the texture layer in the present invention comprises 2.0% - 10% of pigment, preferably 3% - 9%, more preferably 4% - 8%. In an embodiment of the present invention, the mass percentage of the pigment in the texture layer may be 5%.

[0069] In the present invention, the pigment preferably comprises one or more of phthalocyanine blue, quinacridone red, lightfast yellow G, iron oxide black and titanium dioxide. When there are two or more of the above specific substances as the pigment, the present invention has no special limitation on the ratio of the above specific substances, and they can be mixed in any ratio. In an embodiment of the present invention, the pigment may be quinacridone red or lightfast yellow G.

[0070] In the present invention, the texture layer can enable the display device to display a texture after the screen is turned off, thereby playing a role in hiding.

[0071] In the present invention, the thickness of the reflective layer is preferably 6 - 15 μm, more preferably 9 - 12 μm. In an embodiment of the present invention, the thickness of the reflective layer may be 10 μm.

[0072] In the present invention, the reflectivity of the reflective layer is preferably 20% - 25%, more preferably 21% - 23%. In an embodiment of the present invention, the reflectivity of the reflective layer may be 22%.

[0073] By mass percentage, the reflective layer in the present invention comprises 25% - 60% of polyester resin, preferably 30% - 50%. In an embodiment of the present invention, the mass percentage of polyester resin in the reflective layer may be 45%.

[0074] In the present invention, the polyester resin preferably comprises polyester acrylate resin and / or modified polyester resin. The present invention has no special limitation on the type of the modified polyester resin, and the types well-known to those skilled in the art can be used. When there are two or more of the above specific substances as the polyester resin, the present invention has no special limitation on the ratio of the above specific substances, and they can be mixed in any ratio. In an embodiment of the present invention, the polyester resin may be polyester acrylate resin.

[0075] By mass percentage, the reflective layer comprises 30% - 65% of isophorone, preferably 35% - 60%, more preferably 40% - 55%. In an embodiment of the present invention, the mass percentage of isophorone in the reflective layer may be 41%.

[0076] By mass percentage, the reflective layer comprises 2% to 4% of an auxiliary agent, preferably 2.5% to 3.5%, more preferably 2.8% to 3.2%. In an embodiment of the present invention, the mass percentage of the auxiliary agent in the reflective layer can be 3.0%.

[0077] In the present invention, the auxiliary agent preferably comprises an acrylate and / or a silane coupling agent. When the auxiliary agent is an acrylate and a silane coupling agent, the present invention has no special limitation on the ratio of the acrylate to the silane coupling agent, and they can be mixed in any ratio.

[0078] By mass percentage, the reflective layer comprises 4% to 7% of a filler, preferably 4.5% to 6.5%, more preferably 5% to 6%. In an embodiment of the present invention, the mass percentage of the filler in the reflective layer can be 5%.

[0079] In the present invention, the filler preferably comprises titanium dioxide.

[0080] By mass percentage, the reflective layer comprises 1% to 10% of a pigment, preferably 2% to 8%, more preferably 4% to 6%. In an embodiment of the present invention, the mass percentage of the pigment in the reflective layer can be 6%.

[0081] In the present invention, the pigment preferably comprises an aluminum powder slurry. The present invention has no special limitation on the aluminum powder slurry, and an aluminum powder slurry well-known to those skilled in the art can be used.

[0082] In the present invention, when the screen is off, the texture of the reflective layer can be clearly seen.

[0083] In the present invention, the area where the light-shielding layer fits around the surface of the reflective layer accounts for 3% to 95% of the area of the reflective layer; in the present invention, the percentage of the area where the light-shielding layer fits around the surface of the reflective layer to the area of the reflective layer can be adjusted according to actual needs.

[0084] In the present invention, the material of the light-shielding layer is preferably black ink.

[0085] By mass percentage, the black ink of the present invention comprises 20% to 50% of a polyester resin, preferably 25% to 45%, more preferably 30% to 40%. In an embodiment of the present invention, the mass percentage of the polyester resin in the black ink can be 35%.

[0086] In the present invention, the polyester resin preferably includes polyester acrylate resin and / or modified polyester resin. There are no special limitations on the type of the modified polyester resin in the present invention, and the types well-known to those skilled in the art can be used. When the polyester resin is two or more of the above specific selections, there are no special limitations on the ratio of the above specific substances in the present invention, and they can be mixed in any ratio. In the embodiments of the present invention, the polyester resin can be polyester acrylate resin.

[0087] By mass percentage, the black ink of the present invention includes isophorone 25% - 55%, preferably 30% - 50%, more preferably 35% - 45%. In the embodiments of the present invention, the mass percentage of isophorone in the black ink can be 37%.

[0088] By mass percentage, the black ink of the present invention includes additives 2% - 4%, preferably 2.5% - 3.5%, more preferably 2.8% - 3.2%. In the embodiments of the present invention, the mass percentage of the additives of isophorone in the black ink can be 3.0%.

[0089] In the present invention, the additives preferably include acrylate and / or silane coupling agent. When the additives are acrylate and silane coupling agent, there are no special limitations on the ratio of acrylate and silane coupling agent in the present invention, and they can be mixed in any ratio.

[0090] By mass percentage, the black ink includes filler 4% - 7%, preferably 4.5% - 6.5%, more preferably 5% - 6%. In the embodiments of the present invention, the mass percentage of the filler in the black ink can be 5%.

[0091] In the present invention, the filler preferably includes titanium dioxide.

[0092] By mass percentage, the black ink includes pigment 15% - 25%, preferably 17% - 23%, more preferably 18% - 22%. In the embodiments of the present invention, the mass percentage of the pigment in the black ink can be 20%.

[0093] In the present invention, the pigment preferably includes one or more of carbon black, aniline black and iron oxide black. When the pigment is two or more of the above specific selections, there are no special limitations on the ratio of the above specific substances in the present invention, and they can be mixed in any ratio. In the embodiments of the present invention, the pigment can be carbon black.

[0094] The present invention also provides a preparation method of the hidden display cover plate according to the above technical solution, including the following steps:

[0095] Etch the outer surface of the glass substrate to obtain a glass substrate with one side surface having concave-convex texture.

[0096] Successively prepare an optical oil layer, a texture layer, a reflective layer, and a light-shielding layer on the inner surface of the glass substrate to obtain the hidden display cover plate.

[0097] Etch the outer surface of the glass substrate to obtain a glass substrate with one side surface having concave-convex texture.

[0098] In the present invention, the etching process preferably refers to the preparation process of the concave-convex texture described in the above technical solution, and will not be elaborated here.

[0099] After obtaining the glass substrate with one side surface having concave-convex texture, the present invention successively prepares an optical oil layer, a texture layer, a reflective layer, and a light-shielding layer on the inner surface of the glass substrate to obtain the hidden display cover plate.

[0100] The present invention does not have any special limitation on the printing method of the optical oil layer, the reflective layer, and the light-shielding layer, and any process well-known to those skilled in the art can be adopted.

[0101] In the present invention, the printing method of the texture layer is preferably inkjet printing or screen printing. The present invention does not have any special limitation on the inkjet printing and screen printing processes, and any process well-known to those skilled in the art can be adopted.

[0102] After the printing of the optical oil layer, the texture layer, the reflective layer, and the light-shielding layer is completed, the present invention also preferably includes baking and curing. The present invention does not have any special limitation on the baking and curing process, and any process well-known to those skilled in the art can be adopted.

[0103] The present invention also provides the application of the hidden display cover plate described in the above technical solution or the hidden display cover plate prepared by the preparation method described in the above technical solution in a display device.

[0104] As Figure 2 shown, the present invention also provides a display device, which includes a hidden display cover plate, a display screen, and a backlight source that are sequentially stacked;

[0105] The hidden display cover plate is the hidden display cover plate described in the above technical solution or the hidden display cover plate prepared by the preparation method described in the above technical solution;

[0106] The light-shielding layer side of the hidden display cover plate is attached to the display screen.

[0107] In the present invention, the hidden display cover plate and the display screen are preferably bonded by a transparent optical adhesive layer.

[0108] The present invention does not impose any special restrictions on the display screen and the backlight, and those well-known to those skilled in the art can be used. In the present invention, the transparent optical adhesive layer is preferably an OCR liquid optical transparent adhesive or an OCA optical transparent adhesive. In the embodiments of the present invention, the display screen can specifically be a segment display screen; the backlight can specifically be a direct-lit backlight or a side-lit backlight.

[0109] Next, the technical solutions in the present invention will be clearly and completely described in conjunction with the embodiments in the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments in the present invention without creative efforts shall fall within the protection scope of the present invention.

[0110] Embodiment 1

[0111] Structure of the hidden display cover plate: including a glass substrate (with an uneven texture on one surface, the depth of the uneven texture is 15 μm, the haze value is 15%, the thickness is 1.8 mm, and the size is 5.3 inches), an optical oil layer (the thickness is 7 μm, and the material is 47 wt% of polyester acrylate resin, 45 wt% of isophorone, 3 wt% of acrylate, and 5 wt% of titanium dioxide), a texture layer (the thickness is 30 μm, and the material is 25 wt% of acrylic tetrahydrofuran ester, 38 wt% of acrylate monomer, 15 wt% of cyclo-trimethylolpropane formal acrylate, 4 wt% of acrylate oligomer (molecular weight of 1000 - 5000), 10 wt% of 1-hydroxycyclohexyl phenyl ketone, 2 wt% of benzophenone, 1 wt% of fatty alcohol polyoxyethylene ether, and 5 wt% of quinacridone red), a reflective layer (the thickness is 10 μm, the reflectivity is 22%, and the material is 45 wt% of polyester acrylate resin, 41 wt% of isophorone, 3 wt% of acrylate, 5 wt% of titanium dioxide, and 6 wt% of aluminum powder slurry), and a light-shielding layer (the thickness is 8 μm, and the material is 35 wt% of polyester acrylate resin, 37 wt% of isophorone, 3 wt% of acrylate, 5 wt% of titanium dioxide, and 20 wt% of carbon black);

[0112] The surface of the other layer of the glass substrate without the uneven texture is bonded to the optical oil layer;

[0113] The light-shielding layer is bonded to the four side edges of the surface of the reflective layer, and its widths at the four side edges are respectively: 3.8 mm at the upper side, 3.8 mm at the left side, 3.8 mm at the right side, and 8.6 mm at the lower side;

[0114] Preparation method of the hidden display cover plate: First, design a texture pattern using AI or PS software according to actual needs; then, after coating a photosensitive layer on the surface of the PET substrate, perform exposure on the photosensitive layer (after processing the texture pattern through RIP into a dot matrix image, then converting it into a laser control model, and then using the laser beam of a laser imagesetter to perform exposure on the photosensitive layer), and finally perform development (dissolving the exposed photosensitive layer in an alkaline developer), fixing (removing the unexposed photosensitive layer in an acidic fixing solution), and drying in sequence to obtain the patterned film layer;

[0115] After sequentially arranging a photosensitive layer and a patterned film layer on one side surface of a glass substrate, perform ultraviolet exposure, development by dissolving the photosensitive layer after ultraviolet exposure using an alkaline developer, and etching using hydrofluoric acid with a mass percentage concentration of 8%, and then sequentially remove the photoresist, perform chemical polishing, CNC machining, and chemical strengthening to obtain a glass substrate with a concave-convex texture on one side surface;

[0116] Print a varnish layer, a silk-screen texture layer, a printed reflective layer, and a light-shielding layer in sequence on the surface of the glass substrate with a concave-convex texture on one side surface that does not have the concave-convex texture, and bake and cure to obtain the hidden display cover plate (according to the standard of JIS K 5600-5-4:1999, the measured value of the hidden display cover plate is between 9H and 10H (750g), and the hardness difference from the glass itself is not significant).

[0117] Example 2

[0118] Structure of the display device, including a hidden display cover plate (the hidden display cover plate described in Example 1), a transparent optical adhesive layer (specifically OCA transparent adhesive), a display screen (specifically a segment display screen), and a backlight (specifically a direct-lit backlight) that are sequentially stacked and arranged.

[0119] The above is only the preferred embodiment of the present invention and does not impose any form of limitation on the present invention. It should be noted that for those of ordinary skill in the art in this technical field, without departing from the principle of the present invention, several improvements and refinements can still be made, and these improvements and refinements should also be regarded as the protection scope of the present invention.

Claims

1. A hidden display cover plate, characterized in that, It includes a glass substrate, an optical varnish layer, a texture layer, a reflective layer, and a light-shielding layer that are sequentially stacked; The surface of the glass substrate is divided into an outer surface and an inner surface; The outer surface of the glass substrate has an uneven texture; The inner surface of the glass substrate is adhered to the optical varnish layer; The light-shielding layer is adhered to the outer periphery of the surface of the reflective layer.

2. The hidden display cover plate according to claim 1, wherein The depth of the uneven texture is 8 - 20 μm.

3. The hidden display cover plate according to claim 1, characterized in that, The thickness of the optical varnish layer is 5 - 10 μm; By mass percentage, the optical varnish layer includes the following components: 25% - 60% of polyester resin, 30% - 65% of isophorone, 2% - 4% of additives, and 4% - 7% of fillers.

4. The hidden display cover plate according to claim 1, wherein, The thickness of the texture layer is 30 - 80 μm; By mass percentage, the texture layer includes the following components: 15% - 30% of tetrahydrofurfuryl acrylate, 5% - 45% of acrylate monomer, 1.5% - 25% of trimethylolpropane formal acrylate, 1.0% - 5.0% of acrylate oligomer, 1.0% - 20% of photoinitiator, 0.5% - 3% of photosensitizer, 0.5% - 2% of surfactant, and 2.0% - 10% of pigment.

5. The hidden display cover plate according to claim 1, characterized in that, The thickness of the reflective layer is 6 - 15 μm; By mass percentage, the reflective layer includes the following components: 25% - 60% of polyester resin, 30% - 65% of isophorone, 2% - 4% of additives, 4% - 7% of fillers, and 1% - 10% of pigment.

6. The hidden display cover plate according to claim 1, wherein The area where the light-shielding layer is adhered to the periphery of the surface of the reflective layer accounts for 3% - 95% of the area of the reflective layer; The light-shielding layer is a black ink layer.

7. The preparation method of the hidden display cover plate according to any one of claims 1 to 6, characterized in that, It includes the following steps: Etch the outer surface of the glass substrate to obtain a glass substrate with one side surface having an uneven texture; Sequentially prepare an optical varnish layer, a texture layer, a reflective layer, and a light-shielding layer on the inner surface of the glass substrate to obtain the hidden display cover plate.

8. Application of the hidden display cover plate according to any one of claims 1 - 6 or the hidden display cover plate prepared by the preparation method according to claim 7 in a display device.

9. A hidden display device, characterized in that, It includes a hidden display cover plate, a display screen, and a backlight that are sequentially stacked; The hidden display cover plate is the hidden display cover plate according to any one of claims 1 - 6 or the hidden display cover plate prepared by the preparation method according to claim 7; The light-shielding layer side of the hidden display cover plate is in contact with the display screen.

10. The hidden display device according to claim 9, wherein, The hidden display cover plate and the display screen are bonded by a transparent optical adhesive layer.

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