CN111989216B - Functional membrane, glass plate and terminal - Google Patents

Abstract

A functional diaphragm, and glass plate and terminal comprising this functional diaphragm, this functional diaphragm includes the base, coating film layer and substrate that superposes sequentially, the coating film layer locates between base and substrate; the coating layer comprises at least three layers, wherein the thicknesses of all the layers in the at least three layers are not uniform, and the thickness of any one layer in the middle of the at least three layers is larger than that of any other layer, so that more than two areas with reflectivity slopes larger than a threshold value are arranged in a reflection spectrum curve of the coating layer, and the purpose of large-angle color change is realized by the at least three layers with non-uniform thicknesses of all the layers.

Description

Functional membrane, glass plate and terminal

The present application claims priority of the chinese patent application entitled "functional film, glass panel and terminal" filed by the chinese intellectual property office on 19/4/2018 with application number 201810356596.7, the entire contents of which are incorporated herein by reference.

Technical Field

The application relates to the field of electronic equipment, and especially relates to a functional diaphragm, glass board and terminal that big angle discolours.

Background

Mobile terminals such as mobile phones are becoming one of the essential products of modern life, and the functions of the mobile terminals are becoming more and more important under various conditions such as modern life, work contact and the like, but the aesthetic degree of mobile phones, for example, the aesthetic property of mobile phone shells directly influences the purchasing desire of consumers, in order to realize the aesthetic property of mobile phones, the appearance main body materials of mobile phone products have been comprehensively moved to glass materials, namely, the outer surfaces of mobile phones are all made of glass materials, and because the new process treatment mode of the glass materials has great influence on the appearance effect, the competitiveness and differentiation of products are crucial, so each terminal manufacturer is seeking breakthrough of the process on the glass materials.

At present, the commonly used process technology for glass materials comprises: the method comprises the following steps of screen printing, spraying, Glass coating, film transfer printing (GDM) and Polyethylene terephthalate (PET) film texture processing, namely, the appearance of the Glass material can be improved through the processing modes of screen printing, spraying, Glass coating, GDM or PET film texture and the like.

However, when the glass material is processed by the above process, the homogeneity of the above processing process is serious, so that the appearance of the glass material product has no new breakthrough, and is relatively single, that is, when the glass material is applied to terminal products such as mobile phones, the appearance quality of the terminal products is not improved, so that the appearance of the product lacks competitiveness.

Disclosure of Invention

The application provides a function diaphragm, glass board and terminal has realized the purpose that the wide-angle discoloured, has solved current glass material and has caused the appearance quality of glass material product not to obtain the problem that promotes because the treatment process homogeneity is serious.

The application provides a functional membrane, which comprises a base, a coating layer and a substrate which are sequentially stacked, wherein the coating layer is positioned between the base and the substrate;

the film coating layer comprises at least three layers, the thicknesses of all the layers in the at least three layers are uneven, and the thickness of any one layer in the middle of the at least three layers is larger than that of any other layer in the at least three layers, so that more than two areas with reflectivity slopes larger than a threshold value are arranged in a reflection spectrum curve of the film coating layer.

The utility model provides a functional diaphragm, it is inhomogeneous through each layer thickness among the at least three layer construction, and any one deck thickness in the middle of the at least three layer construction is greater than any other one deck thickness of at least three layer construction, so that have the region that the reflectivity slope is greater than the threshold value more than two in the reflectance spectrum curve of coating film layer, when observing the coating film layer with different angles like this, the reflectance spectrum curve of coating film layer moves to the left for spectral character changes, finally make different angles observe at least two kinds of different colours when observing the coating film layer, coating film layer has realized discolouing promptly, and it is more obvious to discolour when the angle is big more, make functional diaphragm realize that the wide-angle discolours like this, when people's eye observes functional diaphragm with different angles like this, the different colours of observing that observe of angle are also different, thereby make the product shadow and the colour effect that are equipped with functional diaphragm abundanter, More dazzle bright, promoted the outward appearance competitiveness of product greatly, consequently, the function diaphragm that this embodiment provided has realized that the wide-angle discolours to make the colour and the shadow level of glass material product abundanter, promoted the outward appearance aesthetic property of glass product, solved current glass material because the treatment process homogeneity seriously leads to the fact the appearance quality of glass material product not obtain the problem that promotes.

In a possible embodiment of the first aspect, a thickness of any one layer in the middle of the at least three-layer structure is 2 to 3 times a thickness of any other layer of the at least three-layer structure. The thickness of any layer in the middle of the at least three-layer structure is set to be 2-3 times that of any other layer of the at least three-layer structure, so that the film coating layer generates two to three areas with larger reflectivity slopes in a visible spectrum, and when the diaphragm is observed at different angles, the color change of the diaphragm at large angles is more obvious, namely the color change of the diaphragm is larger, and the diaphragm presents different obvious colors.

In one possible embodiment of the first aspect, the thickness of the thickest layer in the middle of the at least three-layer structure is between 100 and 300 nm.

In a possible implementation manner of the first aspect, a glue layer is arranged between the substrate and the coating layer, a side of the glue layer facing the coating layer is provided with a groove texture, and the surface of the coating layer is matched with the groove texture. Through orientation at the glue film groove texture has in the one side on coating film layer, coating film layer attaches on texture slot surface like this, and light forms the diffuse reflection, and the colour after the diffuse reflection is more obvious along with the angle change, and rotatory product angle has the light change effect of dazzling of obviously discolouing like this, consequently, in this embodiment, set up the groove texture on the basis that the wide-angle discoloured and make the color change effect of function diaphragm more obvious to make the product of using this function diaphragm have the light change effect of dazzling of obviously discolouing, product appearance dazzles more brightly.

In one possible implementation manner of the first aspect, the groove texture is a micro-nano texture.

In one possible embodiment of the first aspect, the groove texture has a concave-convex shape in cross section.

In one possible embodiment of the first aspect, the glue layer is an ultraviolet, UV, glue layer. Through setting up the glue film into the UV glue film, the influence that the resistant coating film layer stress of UV glue film produced like this to can reduce the fracture of coating film layer UV glue film behind the coating film on the UV glue film, and then reduced the diaphragm surface and appear bad risk.

In one possible embodiment of the first aspect, the UV glue layer has a thickness of 13 μm.

In one possible embodiment of the first aspect, the thickness of the coating layer is between 250nm and 800 nm.

In one possible embodiment of the first aspect, the coating comprises a 5-layer structure.

In a possible implementation manner of the first aspect, the coating layer includes a first silicon dioxide layer, a first titanium pentoxide layer, a second silicon dioxide layer, a second titanium pentoxide layer and a third silicon dioxide layer, which are sequentially stacked, so that when the thickness of any one of the first titanium pentoxide layer, the second silicon dioxide layer and the second titanium pentoxide layer is set to be 2-3 times that of any one of the other layers, the purpose that the color of the functional membrane changes from green to purple is achieved.

In one possible embodiment of the first aspect, the coating comprises a 7-layer structure.

In a possible implementation manner of the first aspect, the plating layer includes a first silicon oxide layer, an indium metal layer, a second silicon oxide layer, a first niobium oxide layer, a third silicon oxide layer, a second niobium oxide layer, and a fourth silicon oxide layer, which are sequentially stacked. Therefore, when the thickness of any one of the five layers of the metal indium layer, the second silicon dioxide layer, the first niobium oxide layer, the third silicon oxide layer and the second niobium oxide layer is set to be 2-3 times of that of any other layer, the purpose that the color of the functional membrane is changed from blue to purple is achieved.

In one possible embodiment of the first aspect, the coating comprises an 8-layer structure.

In one possible embodiment of the first aspect, the plating layer includes a first silicon dioxide layer, a first niobium pentoxide layer, an indium metal layer, a second silicon dioxide layer, a second niobium pentoxide layer, a third silicon dioxide layer, a third niobium pentoxide layer, and a fourth silicon dioxide layer, which are stacked in this order. Such intermediate layer: when the thickness of any one of the first niobium pentoxide layer, the indium metal layer, the second silicon dioxide layer, the second niobium pentoxide layer, the third silicon dioxide layer and the third niobium pentoxide layer is 2-3 times that of any other one of the first silicon dioxide layer, the first niobium pentoxide layer, the indium metal layer, the second silicon dioxide layer, the second niobium pentoxide layer, the third silicon dioxide layer, the third niobium pentoxide layer and the fourth silicon dioxide layer, the color of the diaphragm is changed from blue to purple when the diaphragm is observed from different angles.

In a possible embodiment of the first aspect, the substrate is an opaque ink layer, so that the ink layer prevents light transmission, and the reflection effect of the functional membrane is better.

In one possible embodiment of the first aspect, the number of ink layers is multiple.

In one possible embodiment of the first aspect, the ink layer has a thickness of between 20 and 30 μm.

In one possible embodiment of the first aspect, the substrate is a polyethylene terephthalate PET film.

In one possible embodiment of the first aspect, the PET film is 0.05mm thick.

The application also provides a glass plate, including glass substrate and the aforesaid arbitrary function diaphragm, wherein, the function diaphragm is established in the one side of glass substrate, just the basement of function diaphragm is located the coating film layer of function diaphragm with between the glass substrate.

The glass plate comprises the functional diaphragm, the coating layer is arranged in the functional diaphragm, the change of each layer of thickness is adopted in the coating layer, the coating layer is enabled to have an area with more than two reflectivity slopes larger than a threshold value in a reflection spectrum curve, when the coating layer is observed at different angles, the reflection spectrum curve of the coating layer moves to the left, the spectral characteristics are enabled to change, at least two different colors are observed when the coating layer is observed at different angles, and when human eyes observe the functional diaphragm, the colors observed at different observation angles are different, so that the original transparent clean glass is added with the color-changing shadow effect which is rich, fine and smooth and changeable along with the change of angles and texture light beams, and the brand-new and richer light shadow texture, color change, layering sense, color variation, and the like of glass materials, Degree of depth is felt and is felt with penetrating, and the shadow and the colour effect of glass board are abundanter, more dazzle bright, promote the competitiveness and the appeal of glass product greatly, consequently, the glass board that this embodiment provided has avoided the serious problem of current glass material treatment process homogeneity, the purpose that the glass board wide-angle discoloured has been realized, make the colour and the shadow level of glass material product abundanter like this, the outward appearance aesthetic property of glass product has been promoted, the problem that the outward appearance quality of current glass material because treatment process homogeneity is serious and cause the glass material product does not obtain the promotion has been solved.

The application also provides a terminal, at least comprising a terminal body and the glass plate, wherein the glass plate is positioned on the outer surface of the terminal body.

The terminal of this application sets up above-mentioned glass board through the surface at the terminal body, makes the surface at terminal realize the purpose that the wide-angle discoloured like this, and people's eye presents different colour changes when different angle observation terminal like this to make the terminal product's outward appearance have the dazzling light of obviously discolouing and change the effect, promoted the outward appearance aesthetic property of terminal product greatly, and then make the terminal product have more competitiveness and appeal.

In a possible embodiment of the third aspect, the glass plate includes an upper glass plate and a lower glass plate, wherein the upper glass plate is covered on one side of the screen of the terminal body, and the upper glass plate is covered on the other side of the terminal body facing away from the screen. By including the upper glass plate and the lower glass plate, the front and the back of the terminal can show large-angle color change.

These and other aspects, embodiments and advantages of the exemplary embodiments will become apparent from the embodiments described hereinafter, taken in conjunction with the accompanying drawings. It is to be understood that the specification and drawings are for purposes of illustration only and are not intended as a definition of the limits of the application, for which reference should be made to the appended claims. Additional aspects and advantages of the application will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by practice of the application. Furthermore, the aspects and advantages of the application may be realized and obtained by means of the instrumentalities and combinations particularly pointed out in the appended claims.

Drawings

Fig. 1 is a schematic structural diagram of a functional membrane according to an embodiment of the present disclosure;

FIG. 2 is a schematic structural diagram of a coating layer in a functional film according to an embodiment of the present disclosure;

FIG. 3 is a schematic view of another structure of a functional membrane according to an embodiment of the present disclosure;

4a-4e are schematic diagrams of the color change of the glass observed at different angles after the functional film provided by the embodiment of the present application is attached to the glass;

FIG. 5 is a schematic view of another structure of a coating layer in a functional film according to an embodiment of the present disclosure;

FIG. 6 is a schematic structural view of a glass plate provided in example two of the present application;

fig. 7 is a schematic view of a split structure of a terminal according to a third embodiment of the present application.

Detailed Description

Fig. 1 is a schematic structural diagram of a functional membrane according to an embodiment of the present disclosure; FIG. 2 is a schematic structural diagram of a coating layer in a functional film according to an embodiment of the present disclosure; FIG. 3 is a schematic view of another structure of a functional membrane according to an embodiment of the present disclosure; 4a-4e are schematic diagrams of the color change of the glass observed at different angles after the functional film provided by the embodiment of the present application is attached to the glass; fig. 5 is a schematic view of another structure of a coating layer in a functional film according to an embodiment of the present disclosure.

Referring to fig. 1, the functional film 100 provided in this embodiment includes a base 10, a coating layer 20, and a substrate 30, which are sequentially stacked, where the coating layer 20 is located between the base 10 and the substrate 30, specifically, the coating layer 20 is disposed on the base 10, and the substrate 30 is disposed on the coating layer 20.

In this embodiment, in order to achieve the color change purpose of the functional film 10, specifically, the thicknesses of the layers in the at least three-layer structure are seriously non-uniform, and any one of the layers in the at least three-layer structure is thicker than any other layer in the at least three-layer structure, that is, any one of the layers in the film 20 is thicker than any other layer in the film 20, so that the reflection spectrum curve corresponding to the film 20 has more than two regions with the reflectivity slope larger than the threshold value, when observing the coating layer 20 with different angles like this, the reflection spectrum curve of coating layer 20 shifts to the left for spectral characteristic changes, finally makes coating layer 20 colour change, presents two at least different colours, has realized the purpose that functional diaphragm 100 discoloured, and human eye can observe two at least different colours when observing functional diaphragm with different angles like this, and functional diaphragm 100 has realized the purpose that the wide-angle discoloured.

In this embodiment, the reflection spectrum curve of the film coating layer 20 is a spectrum curve formed by different wavelengths and reflectances, where the abscissa in the reflection spectrum curve is the wavelength, the ordinate is the reflectivity, and the reflectivity slope is the inclination degree corresponding to the connection line between two positions in the reflection spectrum curve, so in this embodiment, the reflection spectrum curve of the film coating layer 20 has more than two regions in which the reflectivity slope is greater than the threshold, that is, it indicates that the reflectivity slope of more than two regions in the reflection spectrum curve of the film coating layer 20 is greater than the threshold, so that the reflection spectrum curve of the film coating layer 20 has more than two regions in which the reflectivity slope is greater, where in this embodiment, the threshold is a slope value corresponding to an inclination angle of 30 °.

In this embodiment, the reflection spectrum curve of the plated layer 20 may have three regions with larger reflectivity slopes (i.e., larger than the threshold), or the reflection spectrum curve of the plated layer 20 may have four regions with larger reflectivity slopes, in practical applications, in order to realize color change, the reflection spectrum curve of the plated layer 20 often has three regions with larger reflectivity slopes, so that the plated layer 20 may have two different colors in the reflection process.

In this embodiment, when the coating layer 20 includes a three-layer structure, the first layer, the second layer and the third layer are respectively included, the second layer is located between the first layer and the third layer, and at this time, the thickness of the second layer is greater than the thicknesses of the other two layers, wherein the coating layer 20 may further include 5 layers of structures, which are respectively the first layer, the second layer, the third layer, the fourth layer and the fifth layer, wherein the middle layer is the second layer, the third layer and the fourth layer, such that the thickness of any one of the second layer, the third layer and the fourth layer is greater than the thickness of any other one of the first layer, the second layer, the third layer, the fourth layer and the fifth layer, for example, the thickness of the second layer is greater than the thickness of the first layer, or the thickness of the second layer is greater than the thickness of the third layer.

In this embodiment, it should be noted that at least three layers of the coating layer 20 are functional layers, that is, in this embodiment, the number of functional layers of the coating layer 20 is at least three, where the functional layer is specifically an effective layer in the coating layer 20, in practical application, two connection layers (that is, the functional layer is located between two connection layers) may be provided outside the functional layer of the coating layer 20, the connection layers are inactive layers, and in order to ensure adhesion between the coating layer and ink (the substrate is often an ink layer), the coating material of the connection layers is often silicon oxide, where the coating material of the functional layer is specifically silicon oxide, niobium oxide, indium metal, titanium oxide, and the like.

The application provides a functional diaphragm 100, through being greater than any other one deck thickness of at least three layer construction with arbitrary one deck thickness in the middle of at least three layer construction, simultaneously, each layer thickness in at least three layer construction is serious inhomogeneous, so that have more than two reflectivity slopes in the reflectance spectrum curve of coating layer 20 and be greater than the region of threshold value, when observing the coating layer with different angles like this, the reflectance spectrum curve of coating layer shifts to the left, make spectral character change, finally make two kinds of different colours observed when observing the coating layer with different angles, the functional diaphragm can realize discolouring, and it is more obvious that discolour when the angle is big more, namely functional diaphragm 100 has realized the wide-angle and has discoloured, like this human eye is when observing functional diaphragm 100, the observed colour that the observation angle is different also, thereby make the product light shadow and the colour effect that is equipped with functional diaphragm 100 abundanter, More dazzle bright, promoted the outward appearance competitiveness of product greatly, consequently, the function diaphragm 100 that this embodiment provided has realized that the wide-angle discolours to make the colour and the shadow level of glass material product abundanter, promoted the outward appearance aesthetic property of glass product, solved current glass material because the treatment process homogeneity seriously leads to the fact the appearance quality of glass material product not obtain the problem that promotes.

In a possible embodiment, in the present embodiment, when the thickness of any one of the middle layers of the at least three-layer structure is greater than that of any other one of the at least three-layer structure, if the thickness difference between the middle layer and any other one of the at least three-layer structure is smaller or larger, the plated layer 20 may change color, but the color change is not very obvious, that is, the color change starts to decrease, so in the present embodiment, to ensure that the plated layer 20 changes color more obviously, specifically, in the present embodiment, the thickness of any one of the middle layers of the at least three-layer structure is 2 to 3 times the thickness of any other one of the at least three-layer structure, that is, the middle one of the plated layer 20 is 2 to 3 times the thickness of any one of the other layers, for example, the plated layer 20 includes three-layer structures, which are the first layer, the second layer, and the third layer, respectively, in which the second layer is 2 times or 3 times the thickness of the other two layers, in practical application, when the film coating layer 20 comprises a three-layer structure, the middle second layer is 3 times of the other two layers, in the embodiment, when the thickness of any one layer in the middle of the at least three-layer structure is set to be 2-3 times of the thickness of any other layer in the at least three-layer structure, the film coating layer 20 can generate two to three areas with larger reflectivity slopes in a visible spectrum, so that the color of the film is changed more, and when the film is observed at different angles, the color of the film is changed more obviously at large angles, so that the film presents different obvious colors.

In this embodiment, it should be noted that when the thickness of any one of the at least three-layer structures is 2 to 3 times that of any one of the other at least three-layer structures, the color change of the plated layer 20 is large, but when the thickness of any one of the at least three-layer structures is about 2 to 3 times that of any one of the other at least three-layer structures, for example, 1.5 times or 3.5 times, the color change of the plated layer 20 starts to be reduced, that is, the color change is not obvious. In the embodiment, when the thickness of any one layer in the middle of the at least three-layer structure is 2.5-3 times of the thickness of any other layer of the at least three-layer structure, the color change is the largest, and the color change is the most obvious.

In this embodiment, for example, if the plating layer 20 includes a 4-layer structure, if the third layer has a thickness of 120nm, the thickness of one of the other three layers is 40-60nm, for example, the first layer is 40-60nm, or the second layer is 40-60nm, or the fourth layer is 40-60 nm. Therefore, the thickness of the third layer and one of the third layer is 2-3 times, and the coating layer 20 can change color at a large angle.

When the reflection spectrum curve of the functional membrane 100 changes with the angle (0 °, 5 °, 30 °, 45 °, 60 °, 75 °), the reflection spectrum curve moves to the left (the spectrum color changes from long-wave color to short-wave color), and the curve form changes (the brightness and saturation of the color change), so that the color change is not obvious within 30 degrees, and the color change from 45 degrees to 75 degrees is very large.

In the functional membrane 100 provided by this embodiment, when the thickness of any one layer in the middle of the at least three-layer structure is 2 to 3 times of the thickness of any other layer of the at least three-layer structure, the reflection spectrum curve of the coating layer 20 has more than two regions with larger reflectivity slopes, when the coating layer is observed at different angles, the reflection spectrum curve of the coating layer 20 moves to the left, so that the spectral characteristics change, and finally, when the coating layer is observed at different angles, at least two different colors are observed, so that when people observe the functional membrane 100 at different angles, the observed colors at different observation angles are different, especially, when the angle is large, the functional membrane 100 changes color, that is, the functional membrane 100 achieves the purpose of large-angle color change, so that the product with the functional membrane 100 has richer and brighter light and color effects, and greatly improves the appearance competitiveness of the product, therefore, the functional membrane 100 that this embodiment provided has realized the purpose that the wide-angle discoloured, makes the colour and the shadow level of glass material product richer like this to promote the outward appearance aesthetic property of glass product, solved current glass material because the treatment process homogeneity is serious and cause the outward appearance quality of glass material product not to obtain the problem of promoting.

In one possible embodiment, the thickness of the middle thickest layer of the coating layer 20 is between 100 and 300nm, i.e., the thickest layer of the functional layers of the coating layer 20 is greater than 100nm and less than 300 nm.

In a possible embodiment, since the coating layer 20 has a weak color change on the surface of a smooth material or object, and a large-angle color change is not obvious, in order to make the color change more obvious at the large angle, in this embodiment, as shown in fig. 3, an adhesive layer 40 is provided between the substrate 10 and the coating layer 20, a side of the adhesive layer 40 facing the coating layer 20 has a groove texture, and the surface of the coating layer 20 matches with the groove texture, so that the coating layer 20 is attached to the surface of the groove texture, light forms diffuse reflection, the color after the diffuse reflection changes more obviously with the angle change, so that the angle of the rotated product has an obvious color change dazzling light change effect, and therefore, in this embodiment, the groove texture is provided on the basis of the large-angle color change to make the color change effect of the functional film 100 more obvious, so that the product using the functional film 100 has an obvious color change dazzling light change effect, the product appearance is more dazzlingly bright.

In the embodiment, the groove texture is formed by imprinting the texture grinding tool on the adhesive layer 40, wherein, since the coating layer 20 is formed by an optical coating method, when the adhesive layer 40 is coated, the coating layer 20 is firstly filled in the groove texture, and the surface of the finally formed coating layer 20 matches with the groove texture (as shown in fig. 3), so that when the substrate 30 is disposed on the coating layer 20, the substrate 30 needs to fill the coating layer 20, and as shown in fig. 3, the surface of the substrate 30 facing the coating layer 20 matches with the groove texture.

Wherein, in this embodiment, glue film 40 specifically is the UV glue film, through setting up glue film 40 into the UV glue film, the resistant coating film layer 20 stress of UV glue film produced's influence like this to can reduce the fracture of coating film layer 20 UV glue film after the coating film on the UV glue film, and then reduced the diaphragm surface and appeared bad risk.

In this embodiment, the thickness of the UV glue layer may be 13 μm.

In this embodiment, when the groove texture is formed on the adhesive layer 40, specifically, the groove texture is a micro-nano texture, that is, the groove texture is a micron-scale or nano-scale texture.

In this embodiment, the cross section of the groove texture is in a concave-convex wavy shape, as shown in fig. 3, the cross section of the groove texture is in a wavy shape, and in practical application, the cross section of the groove texture can also be other micro-nano corrugations.

In a possible embodiment, the thickness of the coating layer 20 is between 250nm and 800nm, for example, the thickness of the coating layer 20 may be 400nm, or may also be 500nm, etc., and the specific thickness is set according to actual requirements.

In a possible embodiment, the coating layer 20 includes a 7-layer structure, as shown in fig. 2 in particular, the 7-layer structure of the coating layer 20 is: the niobium oxide film comprises a first silicon oxide layer 21a, an indium metal layer 22a, a second silicon oxide layer 23a, a first niobium oxide layer 24a, a third silicon oxide layer 25a, a second niobium oxide layer 26a and a fourth silicon oxide layer 27a, wherein the first silicon oxide layer 21a, the indium metal layer 22a, the first niobium oxide layer 24a, the second silicon oxide layer 23a, the second niobium oxide layer 26a, the third silicon oxide layer 25a and the fourth silicon oxide layer 27a are sequentially stacked from bottom to top, as shown in fig. 2, the first silicon oxide layer 21a is 10-20nm thick, the indium metal layer 22a is 21nm thick, the second silicon oxide layer 23a is 53nm thick, the first niobium oxide layer 24a is 69nm thick, the third silicon oxide layer 25a is 81nm thick, the second niobium oxide layer 26a is 126nm thick and the fourth silicon oxide layer 27a is 10-20nm thick. At this time, the functional film 100 including the coating layer 20 is attached to glass for observation, specifically:

the observation angles are respectively perpendicular to the product, i.e. the incident angle is 0 degree (as shown in fig. 4 a), the oblique normal line is 15 degrees, i.e. the incident angle is 15 degrees (as shown in fig. 4 b), the oblique normal line is 30 degrees, i.e. the incident angle is 30 degrees (as shown in fig. 4 c), the oblique normal line is 45 degrees, i.e. the incident angle is 45 degrees (as shown in fig. 4 d), the oblique normal line is 60 degrees, i.e. the incident angle is 60 degrees (as shown in fig. 4 e), it is observed that the color observed at the incident angle of 0 degree is blue as shown in fig. 4a, the color observed at the incident angle of 15 degrees is dark blue as shown in fig. 4b, the color observed at the incident angle of 30 degrees is dark blue-green as shown in fig. 4e, the color observed at the incident angle of 45 degrees is green as shown in fig. 4d, the incident angle of 60 degrees is purple as shown in fig. 4e, therefore, in this embodiment, at the incident angles between 0 degree and 30 degrees, the observed color change is weak and not obvious, the color change is obvious sharply with the increase of the angle, the color observed at 45 degrees may change to the critical color (adjacent color in the spectral color) of the color at 0 degree, the color at 60 degrees may even change to an interval adjacent color (near adjacent color in the spectrum), for example, the color at 0 degree is green, the color at 45 degrees to 60 degrees has changed to purple, or the color at 0 degree is blue, the color at 45 degrees is green, and the color at 60 degrees has changed to purple, that is, the functional membrane 100 of the embodiment realizes the color change at a large angle, and the color changes from one color to another color directly.

Therefore, in the functional membrane 100 provided by this embodiment, when the thickness of any one layer in the middle of the at least three-layer structure is 2 to 3 times of the thickness of any other layer of the at least three-layer structure, the purpose of color change at a large angle is achieved.

In the coating layer 20 having a 7-layer structure, the thickness of the indium metal layer 22a, the second silicon oxide layer 23a, the first niobium oxide layer 24a, or the third silicon oxide layer 25a in the intermediate layer may be set to be 2 to 3 times that of the other layers.

In this embodiment, the coating layer 20 includes 7 layers of a first silicon oxide layer 21a, an indium metal layer 22a, a second silicon oxide layer 23a, a first niobium oxide layer 24a, a third silicon oxide layer 25a, a second niobium oxide layer 26a, and a fourth silicon oxide layer 27a, and when the functional film 100 is attached to glass and observed, the color of the glass observed at an incident angle of 0 degrees is blue, the color of the glass observed at 45 degrees is green, and the color of the glass observed at 60 degrees is purple. That is, in this embodiment, the plating layer 20 includes a five-layer structure of a first silicon oxide layer 21a, an indium metal layer 22a, a second silicon oxide layer 23a, a first niobium oxide layer 24a, a third silicon oxide layer 25a, a second niobium oxide layer 26a, and a fourth silicon oxide layer 27a, and the thickness of any one of the intermediate layers of the first silicon oxide layer 21a, the indium metal layer 22a, the second silicon oxide layer 23a, the first niobium oxide layer 24a, the third silicon oxide layer 25a, the second niobium oxide layer 26a, and the fourth silicon oxide layer 27a is larger than any one of the other layers, so that the color observed by human eyes at an angle of 0 to 60 ° changes from blue to green, and from green to purple, that is, the functional membrane 100 realizes the change of green and purple.

In a possible embodiment, the coating layer 20 includes a 5-layer structure, as shown in fig. 5, the 5-layer structure of the coating layer 20 is specifically: a first silicon dioxide layer 21b, a first titanium pentoxide layer 22b, a second silicon dioxide layer 23b, a second titanium pentoxide layer 24b and a third silicon dioxide layer 25b, which are sequentially stacked, wherein the first silicon dioxide layer 21b, the first titanium pentoxide layer 22b, the second silicon dioxide layer 23b, the second titanium pentoxide layer 24b and the third silicon dioxide layer 25b are sequentially stacked from bottom to top, in this embodiment, specifically, as shown in fig. 5, the second silicon dioxide layer 23b is 210nm thick, the first titanium pentoxide layer 22b and the second titanium pentoxide layer 24b are both 70nm thick, the second silicon dioxide layer 23b is 3 times as thick as the first titanium pentoxide layer 22b or the second titanium pentoxide layer 24b, at this time, when the functional membrane 100 including the coating layer 20 is attached to glass, it is observed that the color of the glass observed at an incident angle of 0 degree is green, the observed color of the glass had changed to purple-red at 45 to 60 degrees.

In one possible embodiment, the coating layer 20 comprises an 8-layer structure, from bottom to top, of a first silicon dioxide layer, a first niobium pentoxide layer, a metal indium layer, a second silicon dioxide layer, a second niobium pentoxide layer, a third silicon dioxide layer, a third niobium pentoxide layer and a fourth silicon dioxide layer, wherein the thicknesses of the first silicon dioxide layer, the first niobium pentoxide layer, the metal indium layer, the second silicon dioxide layer, the second niobium pentoxide layer, the third silicon dioxide layer, the third niobium pentoxide layer and the fourth silicon dioxide layer may be 100nm, 13nm, 11nm, 10nm, 75nm, 72nm, 48nm and 60nm in this order, and the total thickness of the coating layer 20 is 378nm, wherein in this structure, any one of the thicknesses of the first niobium pentoxide layer, the metal indium layer, the second silicon dioxide layer, the second niobium pentoxide layer, the third silicon dioxide layer and the third niobium dioxide layer is greater than the thickness of the first silicon dioxide layer, The thickness of any of the first niobium pentoxide layer, the indium metal layer, the second silicon dioxide layer, the second niobium pentoxide layer, the third silicon dioxide layer, the third niobium pentoxide layer, and the fourth silicon dioxide layer, for example, the third niobium pentoxide layer thickness (48) is greater than the second silicon dioxide layer thickness (10 nm). When the functional film 100 comprising the structural coating layer 20 is attached to glass for observation, tests show that the color observed by human eyes at an angle of 0-60 degrees is blue at 0 degrees, and the color observed at 45-60 degrees is purple.

In a possible implementation manner, the substrate 30 is an opaque ink layer, that is, in this embodiment, the substrate 30 is used to prevent light transmission, so the ink layer is disposed on the film coating layer 20 and plays a role of preventing light transmission, wherein the number of the ink layers may be multiple, as shown in fig. 3, the ink layers include a first ink layer 31 and a second ink layer 32, where it should be noted that the number of the ink layers is specifically set according to an actual application, and may also be 4 or 6, for example.

In one possible embodiment, the thickness of the ink layers is between 20 and 30 μm, i.e. the total thickness of the individual ink layers is in the range of 20 to 30 μm, for example the total thickness of the ink layers may be 25 μm.

In a possible embodiment, the substrate 10 is a PET film, that is, in this embodiment, a UV glue layer 40 is disposed on the PET film, then micro-nano-scale groove textures are imprinted on the UV glue layer 40 by a texture grinding tool, then a film is coated on the groove textures to form a film coating layer 20, and an ink layer is disposed on the film coating layer 20.

In one possible embodiment, the PET film is 0.05mm thick.

Example two

Fig. 6 is a schematic structural diagram of a glass plate provided in the second embodiment of the present application, referring to fig. 6, a glass plate 200 provided in this embodiment includes a glass substrate 201 and the functional membrane 100 provided in the first embodiment, wherein the functional membrane 100 is attached to one surface of the glass substrate 201, and the substrate 10 of the functional membrane 100 is located between the coating layer 20 of the functional membrane 100 and the glass substrate 201, that is, in this embodiment, when the functional membrane 100 is attached to the glass substrate 201, specifically, the substrate 10 of the functional membrane 100 is attached to the glass substrate 201, that is, one surface of a PET film is attached to the UV glue layer 40, and the other surface of the PET film is attached to the glass substrate 201.

In this embodiment, the functional film 100 and the glass substrate 201 may be bonded together by an Optical Clear Adhesive (OCA) glue.

In this embodiment, the glass substrate 201 is specifically a commonly used glass material.

In the glass plate 200 provided in this embodiment, experiments show that the reflection curve of the glass plate 200 varies with the angle (0 °, 5 °, 30 °, 45 °, 60 °, and 75 °), the reflection curve shifts left (the spectral color changes from the long-wave color to the short-wave color), and the curve form changes (the brightness and saturation of the color change), so that the color change is not obvious within 30 degrees, and the color change from 45 degrees to 75 degrees is very large.

Specifically, in this embodiment, the glass substrate 200 formed by bonding the functional film 100 including the coating layer 20 shown in fig. 2 and the glass substrate 201 is observed at different angles, and the observation results are shown in fig. 4a to 4 e: the observation angles are respectively perpendicular to the product, i.e. the incident angle is 0 degree (as shown in fig. 4 a), the oblique normal line is 15 degrees, i.e. the incident angle is 15 degrees (as shown in fig. 4 b), the oblique normal line is 30 degrees, i.e. the incident angle is 30 degrees (as shown in fig. 4 c), the oblique normal line is 45 degrees, i.e. the incident angle is 45 degrees (as shown in fig. 4 d), the oblique normal line is 60 degrees, i.e. the incident angle is 60 degrees (as shown in fig. 4 e), it is observed that the observed color is blue as shown in fig. 4a when the incident angle is 0 degrees, the observed color is dark blue as shown in fig. 4b when the incident angle is 15 degrees, the observed color is dark blue as shown in fig. 4b when the incident angle is 30 degrees, the observed color is dark blue as shown in fig. 4e when the incident angle is 45 degrees, the observed color is green as shown in fig. 4d when the incident angle is 60 degrees, the observed color is purple as shown in fig. 4e when the incident angle is in the range of 0 degree to 30 degrees, the observed color change is weak and not obvious, the color change is obvious sharply along with the increase of the angle, the color observed at 45 degrees can change to the critical color (adjacent color in the spectral color) of the color at 0 degree, the color can change to even one interval adjacent color (adjacent color on the spectrum) when the angle is observed to 60 degrees,

in this embodiment, different coating layers 20 are selected to achieve different color changes, such as green color observed at 0 degrees and purple red color observed at 45 to 60 degrees, or blue color observed at 0 degrees, where 45 degrees changes to green color and purple color changes to 60 degrees.

In this embodiment, it should be noted that fig. 4a to 4e only show one color-changing effect, and in practical applications, color-changing effects of different colors can be obtained by adjusting the thickness of each layer in the film coating layer 20.

Therefore, the glass plate 200 provided in this embodiment, by attaching the functional film 100, penetrates through the glass, so that the originally transparent and clean glass has the color-changing light and shadow effects that are rich, fine and changeable along with the change of the angle and the texture of the light beam, and the brand-new rich light and shadow texture, the wide-angle color change, the layering, the depth and the transparency of the glass material are created, thereby greatly improving the competitiveness and the attraction of the product.

EXAMPLE III

Fig. 7 is a schematic view of a split structure of a terminal according to a third embodiment of the present application. The "terminal" provided in this embodiment may include a mobile phone, a tablet computer, a Personal Digital Assistant (PDA), a Point of Sales (POS), a vehicle-mounted computer, and the like.

In this embodiment, taking a terminal as a mobile phone as an example, as shown in fig. 7, specifically, the terminal 300 includes: a terminal body (not shown) and the glass plate 200 of the second embodiment, wherein the glass plate 200 is located on an outer surface of the terminal body, that is, in this embodiment, the glass plate 200 is made into a housing of the terminal 300, and both a screen cover plate and a bottom shell on the terminal 300 are replaced by the glass plate 200, as shown in fig. 7, the glass plate 200 of the second embodiment is adopted for the main appearance material of the mobile phone, so that when human eyes observe the mobile phone at different angles, the outer surface of the mobile phone presents different colors, so that the appearance light and color of the mobile phone are richer, and the appearance competitiveness of the product is greatly improved.

In this embodiment, when the glass plate 200 is disposed on the terminal body, specifically, the glass plate 200 includes an upper glass plate 200a and a lower glass plate 200b, where the upper glass plate 200a covers one surface of the screen of the terminal body, and the upper glass plate 200a covers the other surface of the terminal body away from the screen, as shown in fig. 7, the upper glass plate 200a and the lower glass plate 200b are respectively located at the front and rear sides of the middle frame main housing 301, so that the mobile phone body is located in a space surrounded by the upper glass plate 200a, the lower glass plate 200b and the middle frame main housing.

In this embodiment, it should be noted that the middle frame main casing of the mobile phone may also adopt the glass plate 200 of the second embodiment, and thus the whole casing of the mobile phone is the glass plate 200, so that the color change effect appears in each direction of observing the mobile phone from different angles, and thus the appearance of the mobile phone presents a richer and more exquisite color change shadow effect, and the mobile phone is more bright.

In addition to the above devices, in the terminal 300 provided in this embodiment, when the terminal 300 is taken as a mobile phone as an example, the terminal body specifically includes Radio Frequency (RF) circuits, a memory, other input devices, a display screen, a sensor, an audio circuit, an I/O subsystem, a processor, a power supply, and other components.

Those skilled in the art will appreciate that the handset configuration shown in fig. 7 is not intended to be limiting and may include more or fewer components than those shown, or may combine certain components, or split certain components, or arranged in different components. Those skilled in the art will appreciate that the display screen is part of a User Interface (UI) and that the terminal device may include fewer than or the same User interfaces as illustrated.

Claims (22)

1. A functional diaphragm is characterized by comprising a base, a coating layer and a substrate which are sequentially superposed, wherein the coating layer is positioned between the base and the substrate;

the film coating layer comprises at least three layers, the thicknesses of all the layers in the at least three layers are uneven, and the thickness of any one layer in the middle of the at least three layers is larger than that of any other layer in the at least three layers, so that more than two areas with reflectivity slopes larger than a threshold value are arranged in a reflection spectrum curve of the film coating layer, and the thickness of any one layer in the middle of the at least three layers is 2-3 times that of any one layer in the at least three layers;

wherein the functional film sheet exhibits at least two different colors when viewed at different angles, the at least two different colors including blue and violet.

2. The functional film according to claim 1, wherein the thickness of the thickest layer in the at least three-layer structure is 100 to 300 nm.

3. The functional film according to claim 1 or 2, wherein a glue layer is provided between the substrate and the coating layer, a surface of the glue layer facing the coating layer has a groove texture, and a surface of the coating layer matches with the groove texture.

4. The functional membrane of claim 3, wherein the groove texture is a micro-nano texture.

5. The functional diaphragm of claim 3 wherein the cross-section of the groove texture is concave-convex.

6. The functional film according to claim 3, wherein the adhesive layer is an Ultraviolet (UV) adhesive layer.

7. The functional film according to claim 6, wherein the thickness of the UV glue layer is 13 μm.

8. The functional film as claimed in claim 1 or 2, wherein the thickness of the coating layer is between 250nm and 800 nm.

9. The functional film as claimed in claim 1 or 2, wherein the coating layer comprises a 5-layer structure.

10. The functional film as claimed in claim 9, wherein the coating layer comprises a first silicon dioxide layer, a first titanium oxide layer, a second silicon dioxide layer, a second titanium oxide layer and a third silicon dioxide layer stacked in this order.

11. The functional film as claimed in claim 1 or 2, wherein the coating layer comprises a 7-layer structure.

12. The functional membrane of claim 11, wherein the coating layer comprises a first silicon oxide layer, an indium metal layer, a second silicon oxide layer, a first niobium oxide layer, a third silicon oxide layer, a second niobium oxide layer and a fourth silicon oxide layer, which are sequentially stacked.

13. The functional film of claim 1, wherein the coating layer comprises an 8-layer structure.

14. The functional film as claimed in claim 13, wherein the coating layer comprises a first silicon dioxide layer, a first niobium pentoxide layer, an indium metal layer, a second silicon dioxide layer, a second niobium pentoxide layer, a third silicon dioxide layer, a third niobium pentoxide layer and a fourth silicon dioxide layer, which are stacked in this order.

15. The functional film according to claim 1 or 2, wherein the substrate is an opaque ink layer.

16. The functional film according to claim 15, wherein the number of ink layers is a plurality of layers.

17. The functional film according to claim 16, wherein the thickness of the ink layer is between 20 and 30 μm.

18. The functional film according to claim 1 or 2, wherein the substrate is a polyethylene terephthalate (PET) film.

19. The functional film of claim 18, wherein the PET film has a thickness of 0.05 mm.

20. A glass plate comprising a glass substrate and the functional membrane of any of claims 1-19, wherein the functional membrane is disposed on one side of the glass substrate and the substrate of the functional membrane is disposed between the coating layer of the functional membrane and the glass substrate.

21. A terminal comprising at least a terminal body and the glass sheet of claim 20, wherein the glass sheet is located on an outer surface of the terminal body.

22. A terminal as claimed in claim 21, wherein the glass plates include an upper glass plate and a lower glass plate, wherein the upper glass plate is covered on one side of the screen of the terminal body, and the lower glass plate is covered on the other side of the terminal body facing away from the screen.

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