Glass cover plate, preparation method of glass cover plate and electronic equipment

Abstract

The invention relates to the technical field of glass cover plates, and provides a glass cover plate, a preparation method of the glass cover plate and electronic equipment, the glass cover plate is prepared from photosensitive glass, photosensitive metal ions in the glass cover plate can be reduced into photosensitive metal atoms, and the photosensitive metal atoms can be reduced into photosensitive metal atoms. The photosensitive metal atoms gather in the photosensitive glass to form the photosensitive metal colloid particles with different concentrations, the photosensitive metal colloid particles have certain sizes, and the photosensitive metal colloid particles with certain sizes and different concentrations present different colors, so that the glass cover plate can present colorful colors, and the service life of the glass cover plate is prolonged. And the photosensitive metal colloid particles are formed in the glass cover plate, so that the influence of the external environment can be isolated, and the color on the glass cover plate is more stable and durable.

Description

Technical Field

[0001] This application relates to the field of glass cover technology, and more particularly to a glass cover, a method for preparing the glass cover, and an electronic device. Background Technology

[0002] Currently, many electronic products on the market (such as mobile phones, iPads, etc.) use glass as a cover. Glass covers can avoid the shielding of electrical signals by metal covers, and also have a simple and stylish appearance and a better feel, which has set off a glass craze in the communications industry.

[0003] Glass covers are usually transparent. To make different areas of the glass cover display various colors, different colored materials need to be coated on the glass cover or colored film layers need to be applied to the glass cover. However, the color stability of the glass cover obtained in this way is not high and the duration is not long. Summary of the Invention

[0004] This application provides a glass cover, a method for preparing the glass cover, and an electronic device, which makes the colorful colors on the glass cover more stable and durable.

[0005] To achieve the above objectives, this application adopts the following technical solution:

[0006] In a first aspect, a glass cover plate is provided, which is made of photosensitive glass and contains photosensitive metal ions; the glass cover plate includes: at least one color region, each color region including at least one color; the glass cover plate in the color region contains photosensitive metal colloidal particles, and the concentration of photosensitive metal colloidal particles in different colors of the glass cover plate is different, and the photosensitive metal colloidal particles are formed by the aggregation of photosensitive metal atoms obtained by the reduction of photosensitive metal ions.

[0007] This application provides a glass cover made of photosensitive glass. The photosensitive metal ions in the glass cover can be reduced to photosensitive metal atoms. The photosensitive metal atoms aggregate in the photosensitive glass to form photosensitive metal colloidal particles of different concentrations. The photosensitive metal colloidal particles have a certain size, and the photosensitive metal colloidal particles of different sizes and concentrations exhibit different colors. In this way, the glass cover can display a variety of colors. Moreover, since the photosensitive metal colloidal particles are formed in the glass cover, they can isolate the influence of the external environment, thereby making the color on the glass cover more stable and durable.

[0008] In one possible implementation of the first aspect, the glass cover gradually darkens in color in a first direction; or, the glass cover exhibits irregular color changes. In this embodiment, the glass cover may gradually darken in color in the first direction to form a gradient color pattern; or the glass cover may exhibit irregular color changes to form irregular color variations, thereby enriching the style of the glass cover.

[0009] In one possible implementation of the first aspect, the glass cover further includes: at least one transparent region, wherein the concentration of photosensitive metal ions contained in the transparent region of the glass cover is greater than the concentration of photosensitive metal ions contained in the colored region of the glass cover. In this embodiment, the glass cover includes not only colorful regions but also at least one transparent region. Thus, by controlling the positions of the transparent and colored regions, diverse texture patterns can be formed on the glass cover, thereby enriching the style of the glass cover.

[0010] In one possible implementation of the first aspect, the transmittance of the transparent region to visible light is greater than or equal to a first preset value, and the transmittance of the colored region to visible light is less than or equal to a second preset value, wherein the first preset value is between 85% and 95%, and the second preset value is between 25% and 35%.

[0011] In one possible implementation of the first aspect, the concentration of the photosensitive metal colloidal particles is between a third preset value and a fourth preset value, wherein the third preset value is between 0.01 mass percentage and 0.02 mass percentage, and the fourth preset value is between 0.19 mass percentage and 0.21 mass percentage. In this embodiment, when the concentration of the photosensitive metal colloidal particles is between the third and fourth preset values, it exhibits a relatively bright and colorful appearance. If the concentration of the photosensitive metal colloidal particles is less than the third preset value, the color may be lighter, approaching transparency. If the concentration of the photosensitive metal colloidal particles is greater than the fourth preset value, the color becomes saturated, and the color does not change with the concentration.

[0012] In one possible implementation of the first aspect, the size of the photosensitive metal colloidal particles is between a fifth preset value and a sixth preset value, wherein the fifth preset value is between 5 nanometers and 15 nanometers, and the sixth preset value is between 140 nanometers and 160 nanometers. In this embodiment, when the size of the photosensitive metal colloidal particles is between the fifth and sixth preset values, they exhibit a relatively bright and colorful appearance. If the size of the photosensitive metal colloidal particles is smaller than the fifth preset value, the color may be lighter, approaching transparency. If the size of the photosensitive metal colloidal particles is larger than the sixth preset value, the color becomes saturated, and the color does not change with the size.

[0013] In one possible implementation of the first aspect, the photosensitive metal colloidal particles are at least one of Ag, Cu, and Au.

[0014] In one possible implementation of the first aspect, the brightness values ​​corresponding to the various colors of the color region in the Lab color space are between 5 and 60, the chromaticity values ​​of the red-green axis are between -80 and 80, and the chromaticity values ​​of the yellow-blue axis are between -80 and 80.

[0015] Secondly, a method for preparing a glass cover plate is provided, comprising: providing photosensitive glass, wherein the photosensitive glass contains photosensitive metal ions; attaching a light-blocking film to the photosensitive glass, the light-blocking film comprising multiple regions, the different regions corresponding to different ultraviolet transmittances; subjecting the photosensitive glass to ultraviolet exposure treatment on the side of the light-blocking film away from the photosensitive glass; removing the light-blocking film; and subjecting the exposed photosensitive glass to heat treatment.

[0016] The preparation method of this application uses photosensitive glass containing photosensitive metal ions as a substrate. The photosensitive glass is exposed to ultraviolet light of varying intensities. The energy received by the photosensitive glass from the ultraviolet light varies, resulting in different concentrations of photosensitive metal atoms within the exposed photosensitive glass. During the heat treatment of the exposed photosensitive glass, the photosensitive metal atoms migrate and aggregate to form photosensitive metal colloidal particles of a certain size. These particles exhibit a specific color; and different concentrations of photosensitive metal atoms can form photosensitive metal colloidal particles of different concentrations. Therefore, photosensitive metal colloidal particles of a certain size and different concentrations can exhibit different colors. Thus, areas with different concentrations of photosensitive metal colloidal particles within the prepared glass cover can exhibit different colors, resulting in a variety of colors, such as gradient colors or irregular color changes. This allows for a controllable appearance of the glass cover, and the preparation method is simple. Furthermore, because the photosensitive metal colloidal particles are formed within the glass cover, they can isolate the influence of the external environment, making the color on the glass cover more stable and durable.

[0017] In one possible implementation of the second aspect, the light-blocking film is a light-blocking plate with inconsistent thickness, a light-blocking plate with consistent thickness and coated with a light-blocking layer of gradually varying transmittance, or a film that has undergone color-reversing treatment. Several implementations of the light-blocking film are provided in the embodiments of this application, and their preparation is simple.

[0018] In one possible implementation of the second aspect, multiple regions of the light-blocking sheet include ink-covered regions, or a specific region of the side of the photosensitive glass that is attached to the light-blocking sheet is coated with ink. Since black ink absorbs most ultraviolet light, the photosensitive metal particles in the ink-covered or ink-coated regions of the photosensitive glass will not be reduced to photosensitive metal atoms. Therefore, after fabrication, the ink-covered or ink-coated regions of the photosensitive glass are colorless and transparent. Thus, by controlling the position of the ink-covered or specific regions, colorless and transparent textured patterns can be formed on the glass cover, thereby enriching the style of the glass cover.

[0019] In one possible implementation of the second aspect, the ultraviolet transmittance of the light-blocking sheet gradually increases in the first direction, or the ultraviolet transmittance of the light-blocking sheet exhibits irregular changes. The intensity of ultraviolet light received by the photosensitive glass in the first direction gradually increases. After exposure, the concentration of photosensitive metal atoms within the photosensitive glass increases in the first direction. After preparation, the color of the photosensitive glass gradually deepens in the first direction, exhibiting a gradient color. Alternatively, if the intensity of ultraviolet light received by the photosensitive glass is irregular, and the concentration of photosensitive metal atoms within the photosensitive glass changes irregularly after exposure, the color of the photosensitive glass exhibits irregular changes after preparation. This improves the pattern diversity of the prepared glass cover.

[0020] In one possible implementation of the second aspect, during the ultraviolet exposure stage, the energy density of the ultraviolet light source is between an eighth and a ninth preset value, wherein the eighth preset value is between 4.5 microwatts per square centimeter and 5.5 microwatts per square centimeter, and the ninth preset value is between 19.5 microwatts per square centimeter and 20.5 microwatts per square centimeter; the duration of ultraviolet exposure is between a tenth and an eleventh preset value, wherein the tenth preset value is between 10 minutes and 30 minutes, and the eleventh preset value is between 50 minutes and 60 minutes. In this embodiment, the energy density of the ultraviolet light source and the exposure time together determine the number of photosensitive metal ions A+ reduced to photosensitive metal atoms A inside the photosensitive glass during the ultraviolet exposure process, thereby affecting the concentration of photosensitive metal colloidal particles formed after the photosensitive metal atoms aggregate inside the photosensitive glass, so that the prepared photosensitive glass can exhibit bright and colorful hues.

[0021] In one possible implementation of the second aspect, during the heat treatment stage, the heat treatment temperature is between a twelfth and a thirteenth preset value, wherein the twelfth preset value is between 450°C and 550°C, and the thirteenth preset value is between 600°C and 650°C; the heat treatment time is between a fourteenth and a fifteenth preset value, wherein the fourteenth preset value is between 0.5 hours and 1.5 hours, and the fifteenth preset value is between 2 hours and 4 hours. In this embodiment, the heat treatment temperature and time together determine the size of the colloidal particles after the photosensitive metal atoms aggregate into a photosensitive metal colloid within the photosensitive glass.

[0022] In one possible implementation of the second aspect, providing the photosensitive glass includes: melting, casting, and annealing according to a glass formula to obtain a photosensitive glass blank, wherein the glass formula includes: 50-70% by mass of SiO2, 20-30% by mass of R2O, where R is one or more of Li, Na, and K; 1-10% by mass of RO, where R is one or more of Ca, Sr, and Ba; 1-8% by mass of Al2O3; 0.05-0.3% by mass of CeO2; 0.05-0.5% by mass of AO, where A is one or more of Ag, Cu, or Au; and 0.05-0.7% by mass of Sb2O3; and cutting the photosensitive glass blank into multiple photosensitive glasses of preset sizes.

[0023] In one possible implementation of the second aspect, after heat treatment of the exposed photosensitive glass, the method further includes: chemically strengthening the heat-treated photosensitive glass; and coating the strengthened photosensitive glass. In this embodiment, the heat-treated photosensitive glass undergoes chemical strengthening treatment to form a chemically strengthened layer on its surface. This chemically strengthened layer is a compressive stress layer formed on the surface of the photosensitive glass through an ion exchange process. The presence of this compressive stress layer makes the photosensitive glass less prone to cracking under external force. Therefore, chemical strengthening treatment can improve the mechanical strength and impact resistance of the photosensitive glass. Furthermore, the coating treatment, by applying a layer of nano-chemical material to the surface of the photosensitive glass, minimizes the surface tension of the glass, thereby reducing the contact area between dust and the surface of the photosensitive glass, giving the surface of the photosensitive glass resistance to oil stains and fingerprints.

[0024] In one possible implementation of the second aspect, the chemical strengthening treatment of the heat-treated photosensitive glass includes: placing the heat-treated photosensitive glass in a sodium-containing molten salt for a first chemical strengthening treatment; and placing the photosensitive glass after the first chemical treatment in a potassium-containing molten salt for a second chemical strengthening treatment.

[0025] Thirdly, an electronic device is provided, comprising: a glass cover of the first aspect or any one of the first aspects.

[0026] Based on the implementation methods provided in the above aspects, this application can be further combined to provide more implementation methods. Attached Figure Description

[0027] Figures 1 to 7 This is a schematic diagram of the first aspect of the glass cover provided in the embodiments of this application;

[0028] Figure 8 This is an exemplary flowchart of the method for preparing the second aspect of the glass cover provided in the embodiments of this application;

[0029] Figure 9 This is a schematic diagram of ultraviolet exposure of photosensitive glass provided in an embodiment of this application;

[0030] Figure 10 This is a schematic diagram illustrating the formation of a controllable gradient textured glass cover provided in an embodiment of this application. Detailed Implementation

[0031] The technical solutions in this application will now be described with reference to the accompanying drawings.

[0032] In the description of the embodiments of this application, unless otherwise stated, " / " means "or". For example, A / B can mean A or B. "And / or" in this document is merely a description of the relationship between related objects, indicating that there can be three relationships. For example, A and / or B can mean: A exists alone, A and B exist simultaneously, and B exists alone.

[0033] Hereinafter, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this embodiment, unless otherwise stated, "a plurality of" means two or more.

[0034] To facilitate understanding of the technical solutions of the embodiments of this application, some terms involved in the embodiments of this application will be briefly explained below.

[0035] (1) Photosensitive metal ions

[0036] Photosensitive metal ions refer to metal elements in an ionic state that can produce specific responses to light, such as electronic transitions or redox reactions.

[0037] (2) Photosensitive metal atoms

[0038] A photosensitive metal atom refers to a single metal atom. A photosensitive metal ion is a state in which a photosensitive metal atom loses or gains electrons; they can transform into each other through the gain or loss of electrons.

[0039] (3) Photosensitive metal colloidal particles

[0040] Photosensitive metal colloidal particles are nanoscale particles formed by the aggregation of photosensitive metal atoms. They are dispersed in a medium to form a colloid and have photoresponsiveness in the visible light band, thus exhibiting a certain color.

[0041] The glass cover provided in this application can be applied to electronic devices, such as mobile phones, wearable devices, tablets, personal computers (PCs), virtual reality (VR) devices, augmented reality (AR) devices, etc. This application does not limit the specific technology or form of the electronic device used.

[0042] Taking a mobile phone as an example, a glass cover can serve as the back cover for the battery, the touchscreen, or the rear display screen. If the glass cover is used as a touchscreen or rear display screen, the edges can be multicolored, while the center is colorless and transparent to avoid interfering with the normal display. If the glass cover is used as the battery back cover, all areas of the glass cover can be multicolored.

[0043] To better understand the embodiments of this application, the technical solution of this application will be described below using a glass cover as the battery back cover of a mobile phone as an example.

[0044] In today's daily life, mobile phones have become an indispensable communication tool. With the continuous updates and iterations of mobile phone products, people's demands for mobile phone functions, performance, and appearance are becoming increasingly diverse. The back cover of a mobile phone battery is not only a basic accessory to protect the battery, but also a key factor in evaluating the aesthetics of the phone's appearance.

[0045] To meet users' aesthetic preferences for mobile phone battery back covers, the materials used have evolved from the initial plastic covers to today's ceramic and glass covers. Furthermore, the design of mobile phone battery back covers has gradually evolved from solid colors to a wide variety of colors.

[0046] Currently, to achieve a variety of colors on glass covers, methods such as film lamination, sandblasting, laser engraving, splicing, AG frosting, etching, and coating can be used. These methods involve coating the finished glass cover with different colored materials or laminating colored film layers onto it. However, the colors obtained in these methods are not very stable and do not last long.

[0047] In view of this, the present application provides a glass cover plate, which is made of photosensitive glass and includes photosensitive metal ions; the glass cover plate includes: at least one color region, each color region including at least one color; the glass cover plate in the color region includes photosensitive metal colloidal particles, and the concentration of photosensitive metal colloidal particles in different color regions of the glass cover plate is different, and the photosensitive metal colloidal particles are formed by the aggregation of photosensitive metal atoms obtained by the reduction of photosensitive metal ions.

[0048] This application provides a glass cover made of photosensitive glass. The photosensitive metal ions in the glass cover can be reduced to photosensitive metal atoms. The photosensitive metal atoms aggregate in the photosensitive glass to form photosensitive metal colloidal particles of different concentrations. The photosensitive metal colloidal particles have a certain size, and the photosensitive metal colloidal particles of different sizes and concentrations exhibit different colors. In this way, the glass cover can display a variety of colors. Moreover, since the photosensitive metal colloidal particles are formed in the glass cover, they can isolate the influence of the external environment, thereby making the color on the glass cover more stable and durable.

[0049] The following is in conjunction with the appendix Figure 1 To be continued Figure 7 This application provides a detailed description of a glass cover plate according to an embodiment, with appended details. Figure 1 To be continued Figure 7 This is an example diagram of a glass cover.

[0050] In this embodiment, the glass cover is made of photosensitive glass, which contains photosensitive metal ions. These photosensitive metal ions can be at least one of Ag, Cu, and Au. For example, they can be one of Ag, Cu, and Au, or two or more of Ag, Cu, and Au, such as Ag and Cu. The photosensitive metal ions within the photosensitive glass can be reduced to photosensitive metal atoms. These photosensitive metal atoms, after accumulating within the photosensitive glass, can form photosensitive metal colloidal particles of varying concentrations. These photosensitive metal colloidal particles have a certain size, and their color is related to their concentration and size. Since the photosensitive metal ions can be at least one of Ag, Cu, and Au, the photosensitive metal colloidal particles can also be at least one of Ag, Cu, and Au.

[0051] Among them, the photosensitive metal colloidal particles have different sizes, but different colors when the concentration is the same.

[0052] For example, when the concentration of photosensitive metal colloidal particles is the same, if the photosensitive metal colloidal particles are Au, the color is pale rose-red when the size is less than 20 nm; red when the size is between 20 nm and 50 nm; purplish-red when the size is between 50 nm and 100 nm; and blue when the size is between 100 nm and 150 nm. If the photosensitive metal colloidal particles are Ag, the color is yellow or orange when the size is around 20 nm; and orange-red or red when the size is around 60 nm.

[0053] Given a fixed size, photosensitive metal colloidal particles of different concentrations can exhibit different colors.

[0054] For example, given a fixed size of photosensitive metal colloidal particles, if the particles are Ag, the color is reddish-brown at a concentration of 0.1 wt% and black at a concentration of 0.15 wt%; if the particles are Cu, the color is red at a concentration of 0.11 wt% and dark red at a concentration of 0.17 wt%; and if the particles are Au, the color is purplish-red at a concentration of 0.08 wt% and blue at a concentration of 0.16 wt%. It can be seen that, given a fixed particle size, the higher the concentration of photosensitive metal colloidal particles, the darker the color; conversely, the lower the concentration, the lighter the color.

[0055] Thus, in this embodiment, by controlling the size and concentration of photosensitive metal colloidal particles within the photosensitive glass, the photosensitive glass can exhibit a variety of colors. It should be noted that for glass covers prepared using the same process, the size of the photosensitive metal colloidal particles inside is approximately the same. If the concentration of these particles is also the same, only one color can be displayed. Therefore, for glass covers prepared using the same process, the formation of multiple colors is mainly due to differences in the concentration of the photosensitive metal colloidal particles. However, for two glass covers prepared using different processes, the color difference between the two covers depends on the differences in both the size and concentration of the photosensitive metal colloidal particles.

[0056] In one possible implementation, the concentration of the photosensitive metal colloidal particles is between a third preset value and a fourth preset value, where the third preset value is between 0.01wt% and 0.02wt%, and the fourth preset value is between 0.19wt% and 0.21wt%. In this embodiment, when the concentration of the photosensitive metal colloidal particles is between the third and fourth preset values, it exhibits a relatively bright and colorful appearance. If the concentration of the photosensitive metal colloidal particles is less than the third preset value, the color may be lighter, approaching transparency. If the concentration of the photosensitive metal colloidal particles is greater than the fourth preset value, the color becomes saturated, and the color does not change with the concentration.

[0057] The third preset value is between 0.01 wt% and 0.02 wt%, for example, the third preset value can be 0.01, 0.15, 0.2, etc. The fourth preset value is between 0.19 wt% and 0.21 wt%, for example, the fourth preset value can be 0.19, 0.20, 0.21, etc. For example, the concentration of photosensitive metal colloidal particles can be between 0.1 wt% and 0.2 wt%.

[0058] In one possible implementation, the size of the photosensitive metal colloidal particles is between a fifth preset value and a sixth preset value, where the fifth preset value is between 5 nm and 15 nm and the sixth preset value is between 140 nm and 160 nm.

[0059] In this embodiment, when the size of the photosensitive metal colloidal particles is between a fifth and a sixth preset value, they exhibit a more vibrant and multicolored appearance. If the size of the photosensitive metal colloidal particles is smaller than the fifth preset value, the color may be lighter, approaching transparency. If the size of the photosensitive metal colloidal particles is larger than the sixth preset value, the color becomes saturated, and the color does not change with the size. The fifth preset value is between 5nm and 15nm, for example, 5nm, 10nm, 15nm, etc. The sixth preset value is between 140nm and 160nm, for example, 140nm, 150nm, 160nm, etc. For example, the size of the photosensitive metal colloidal particles can be between 10nm and 150nm, in which case they exhibit a more vibrant and multicolored appearance.

[0060] For example, see Figure 1 The various colors in color region 101 correspond to brightness values ​​between 5 and 60 in the Lab color space, red-green axis chromaticity values ​​between -80 and 80, and yellow-blue axis chromaticity values ​​between -80 and 80.

[0061] Based on the limitations of the size and concentration of the photosensitive metal colloidal particles mentioned above, in this embodiment, the various colors of the color region 101 within the glass cover plate correspond to brightness values ​​between 5 and 60 in the Lab color space, red-green axis chromaticity values ​​between -80 and 80, and yellow-blue axis chromaticity values ​​between -80 and 80. For example, if a color in the color region 101 within the glass cover plate has a brightness value of 10, a red-green axis chromaticity value of -80, and a yellow-blue axis chromaticity value of 80, then that color is a very dark blue-green; if a color in the color region 101 within the glass cover plate has a brightness value of 60, a red-green axis chromaticity value of 80, and a yellow-blue axis chromaticity value of 80, then that color is a bright orange-yellow; if a color in the color region 101 within the glass cover plate has a brightness value of 30, a red-green axis chromaticity value of -40, and a yellow-blue axis chromaticity value of 40, then that color is a medium-brightness greenish-yellow.

[0062] like Figure 2 As shown, assuming that multiple colors in color region 101 exhibit a gradient in the first direction (arrow direction), the darkest region is the dark region, and the lightest region is the light region. The dark region C1 can be represented by (L1, a1, b1) in the Lab color space, and the light region C2 can be represented by (L2, a2, b2) in the Lab color space. Thus, other colors between the dark and light regions can be obtained by linear interpolation. Assuming that the length of the region from the darkest to the lightest color is m, and t represents the distance of a certain color from the lightest region, then a certain color C(t) can be calculated by the following formula (1):

[0063] C(t)=C2+t(C1-C2) (1)

[0064] Where t varies between 0 and 1, and n is the increment of t for each change. The larger the value of n, the greater the increase of t, that is, the faster the color gradient. The range of n is 0.001 to 0.1.

[0065] In one possible implementation, the color area 101 of the glass cover in this embodiment may be one, and the color area 101 may include multiple colors. For example, as shown... Figure 2 As shown, the glass cover plate gradually darkens in color in the first direction, which is... Figure 2 The direction indicated by the middle arrow. For example, the color of the glass cover in the first direction could gradually change from red to dark red, or from light orange to orange, or from light red to purplish-red. For example, as... Figure 3As shown, the glass cover can exhibit irregular color changes. The closer a position is to white in the diagram, the lighter the color or the colorless and transparent; the closer a position is to black, the darker the color. In this embodiment, the glass cover can gradually darken in the first direction to form a gradient color pattern; or the glass cover can exhibit irregular color changes to form irregular color variations, thereby enriching the style of the glass cover.

[0066] In another possible implementation, the glass cover plate in this embodiment may have multiple color regions 101, and each color region 101 may include at least one color. The glass cover plate includes multiple color regions 101, and any two color regions 101 may have different colors. The glass cover plate includes multiple color regions 101, each region may include multiple colors, and any two color regions 101 may have the same or different colors.

[0067] In another possible implementation, such as Figure 1 As shown, the glass cover also includes at least one transparent region 102, wherein the concentration of photosensitive metal ions contained in the glass cover of the transparent region 102 is greater than the concentration of photosensitive metal ions contained in the glass cover of the color region 101.

[0068] The transparent region 102 is a colorless and transparent area. The glass cover plate of the transparent region 102 contains photosensitive metal ions, with a content approximately the same as that in the photosensitive glass substrate. Since the photosensitive metal ions in the glass cover plate of the transparent region 102 are not reduced to photosensitive metal atoms, the glass cover plate of the transparent region 102 does not contain photosensitive metal colloidal particles. In contrast, the photosensitive metal ions in the glass cover plate of the colored region 101 are reduced to photosensitive metal atoms. These photosensitive metal atoms aggregate within the photosensitive glass to form photosensitive metal colloidal particles of varying concentrations. Therefore, the concentration of photosensitive metal ions in the glass cover plate of the colored region 101 is lower than the concentration in the glass cover plate of the transparent region 102. In this embodiment, the glass cover plate includes not only multicolored areas but also at least one transparent area. Thus, by controlling the positions of the transparent and colored areas, diverse textures and patterns can be formed on the glass cover plate, thereby enriching the style of the glass cover plate.

[0069] Furthermore, because the concentration of photosensitive metal atoms varies in regions of photosensitive glass, the concentration of photosensitive metal colloidal particles formed will also vary; conversely, in regions with the same concentration of photosensitive metal atoms, the concentration of photosensitive metal colloidal particles will be approximately the same. It is known that, given a fixed size of photosensitive metal colloidal particles, a higher concentration of these particles results in a darker color. Therefore, it can be concluded that in areas of darker color within the glass cover, the concentration of photosensitive metal colloidal particles is higher, and the concentration of photosensitive metal ions is lower; conversely, in areas of lighter color within the glass cover, the concentration of photosensitive metal colloidal particles is lower, and the concentration of photosensitive metal ions is higher.

[0070] For example, the transmittance of the transparent region 102 to visible light is greater than or equal to a first preset value, and the transmittance of the colored region 101 to visible light is less than or equal to a second preset value. The first preset value is between 85% and 95%, and the second preset value is between 25% and 35%. The first preset value can be 85%, 90%, 95%, etc.; the second preset value can be 25%, 30%, 35%. It is achievable that the transparent region 102 has good transmittance in the visible light band 400-720nm, with a transmittance greater than 90%; for example, the transmittance can be 90%, 92%, etc. The transmittance of the colored region 101 in the visible light band 400-720nm is between 1% and 30%, and the light absorption cutoff wavelength is between 400 and 950nm.

[0071] The glass cover plate in this application will be described below with reference to specific embodiments.

[0072] (1) As shown in Table 1 below, there are three different glass covers made of photosensitive glass with Ag as the photosensitive metal ion.

[0073] Table 1

[0074]

[0075] In Table 1, the photosensitive metal colloidal particles in the glass covers shown in Examples 1 and 2 have the same size, 120 nanometers. The concentrations of the photosensitive metal colloidal particles in the glass covers shown in Examples 1 and 2 are different. The concentration of the photosensitive metal colloidal particles in the glass cover of Example 1 is between 0.1 wt% and 0.15 wt%, while the concentration of the photosensitive metal colloidal particles in the glass cover of Example 2 is between 0.02 wt% and 0.10 wt%. Therefore, the overall color of the glass cover in Example 1 is darker, ranging from reddish-brown to black; the overall color of the glass cover in Example 2 is lighter, ranging from silvery-yellow to reddish-brown.

[0076] The concentration range of the photosensitive metal colloidal particles in the glass covers shown in Examples 1 and 3 is the same, both between 0.1 wt% and 0.15 wt%. The size of the photosensitive metal colloidal particles in the glass covers shown in Examples 1 and 3 is different. The size of the photosensitive metal colloidal particles in the glass cover shown in Example 1 is 120 nanometers, while the size of the photosensitive metal colloidal particles in the glass cover shown in Example 3 is 70 nanometers. Therefore, the overall color of the glass cover in Example 1 is darker, ranging from reddish-brown to black; the overall color of the glass cover in Example 3 is lighter, ranging from silvery-yellow to reddish-brown.

[0077] The concentration and size of the photosensitive metal colloidal particles in the glass covers shown in Examples 2 and 3 are different. Under the combined effect of both, the glass covers shown in Examples 2 and 3 exhibit the same color range, which is between silvery yellow and reddish brown.

[0078] (2) As shown in Table 2 below, there are three different glass covers made of photosensitive glass with Au photosensitive metal ions.

[0079] Table 2

[0080]

[0081] In Table 2, the photosensitive metal colloidal particles in the glass covers shown in Examples 4 and 5 have the same size, 100 nanometers. The concentrations of the photosensitive metal colloidal particles in the glass covers shown in Examples 4 and 5 are different. The concentration of the photosensitive metal colloidal particles in the glass cover of Example 4 is between 0.08 wt% and 0.16 wt%, while the concentration of the photosensitive metal colloidal particles in the glass cover of Example 5 is between 0.04 wt% and 0.08 wt%. Therefore, the overall color of the glass cover in Example 4 is darker, ranging from purplish-red to blue; while the overall color of the glass cover in Example 5 is lighter, ranging from light red to purplish-red.

[0082] The concentration range of the photosensitive metal colloidal particles in the glass covers shown in Examples 4 and 6 is the same, both between 0.08 wt% and 0.16 wt%. The size of the photosensitive metal colloidal particles in the glass covers shown in Examples 4 and 6 is different. The size of the photosensitive metal colloidal particles in the glass cover shown in Example 4 is 100 nanometers, while the size of the photosensitive metal colloidal particles in the glass cover shown in Example 6 is 60 nanometers. Therefore, the overall color of the glass cover in Example 4 is darker, ranging from purplish-red to blue; while the overall color of the glass cover in Example 6 is lighter, ranging from light red to purplish-red.

[0083] The concentration and size of the photosensitive metal colloidal particles in the glass covers shown in Examples 5 and 6 are different. Under the combined effect of both, the glass covers shown in Examples 5 and 6 exhibit the same color range, which is between light red and purplish red.

[0084] (3) As shown in Table 3 below, there are three different glass covers made of photosensitive glass with Cu photosensitive metal ions.

[0085] Table 3

[0086]

[0087] In Table 3, the photosensitive metal colloidal particles in the glass covers shown in Examples 7 and 8 have the same size, 110 nanometers. The concentrations of the photosensitive metal colloidal particles in the glass covers shown in Examples 7 and 8 are different. The concentration of the photosensitive metal colloidal particles in the glass cover of Example 7 is between 0.11 wt% and 0.17 wt%, while the concentration of the photosensitive metal colloidal particles in the glass cover of Example 8 is between 0.05 wt% and 0.1 wt%. Therefore, the overall color of the glass cover in Example 7 is darker, ranging from red to dark red; while the overall color of the glass cover in Example 8 is lighter, ranging from light red to red.

[0088] The concentration range of the photosensitive metal colloidal particles in the glass covers shown in Examples 7 and 9 is the same, both between 0.11 wt% and 0.17 wt%. The size of the photosensitive metal colloidal particles in the glass covers shown in Examples 7 is different. The size of the photosensitive metal colloidal particles in the glass cover shown in Example 7 is 110 nanometers, while the size of the photosensitive metal colloidal particles in the glass cover shown in Example 9 is 7 nanometers. Therefore, the overall color of the glass cover in Example 7 is darker, ranging from red to dark red; while the overall color of the glass cover in Example 9 is lighter, ranging from light red to red.

[0089] The concentration range and size of the photosensitive metal colloidal particles in the glass covers shown in Examples 8 and 9 are different. Under the combined effect of the two, the glass covers shown in Examples 8 and 9 exhibit the same color range, which is between light red and red.

[0090] (4) As shown in Table 4 below, there are three different glass covers made of photosensitive glass with photosensitive metal ions Au and Ag and Au:Ag ratio of 7:3.

[0091] Table 4

[0092]

[0093] In Table 4, the photosensitive metal colloidal particles in the glass covers shown in Examples 10 and 11 are the same size, with Au being 90 nm and Ag being 110 nm. The concentrations of the photosensitive metal colloidal particles in the glass covers shown in Examples 10 and 11 are different. The concentration of the photosensitive metal colloidal particles in the glass cover of Example 10 is between 0.09 wt% and 0.14 wt%, while the concentration of the photosensitive metal colloidal particles in the glass cover of Example 11 is between 0.03 wt% and 0.08 wt%. Therefore, the overall color of the glass cover in Example 10 is darker, ranging from orange to dark red; while the overall color of the glass cover in Example 11 is lighter, ranging from light orange to orange.

[0094] The concentration range of the photosensitive metal colloidal particles in the glass covers shown in Examples 10 and 12 is the same, both between 0.09 wt% and 0.14 wt%. The sizes of the photosensitive metal colloidal particles in the glass covers shown in Examples 10 and 12 are different. In the glass cover shown in Example 10, the Au particles are 90 nm and the Ag particles are 110 nm, while in the glass cover shown in Example 12, the Au particles are 50 nm and the Ag particles are 60 nm. Therefore, the overall color of the glass cover in Example 10 is darker, ranging from orange to dark red; while the overall color of the glass cover in Example 12 is lighter, ranging from light orange to light orange.

[0095] The concentration range and size of the photosensitive metal colloidal particles in the glass covers shown in Examples 11 and 12 are different. Under the combined effect of the two, the color ranges of the glass covers shown in Examples 11 and 12 are relatively similar.

[0096] Secondly, this application provides a method for preparing a glass cover plate, which is used to prepare the glass cover plate in the above embodiments.

[0097] The following is in conjunction with the appendix Figure 8 The preparation method of the glass cover plate provided in the embodiments of this application will be described in detail. Figure 8 This is an exemplary flowchart of a method for preparing a glass cover.

[0098] Step 201: Provide photosensitive glass, which contains photosensitive metal ions.

[0099] In one implementation, pre-cut photosensitive glass of a preset size can be directly provided. The photosensitive glass contains photosensitive metal ions, which are at least one of Ag, Cu, and Au.

[0100] In another implementation, the step of providing photosensitive glass includes: melting, casting, and annealing according to a glass formula to obtain a photosensitive glass blank, wherein the glass formula includes: 50-70% by mass of SiO2, 20-30% by mass of R2O, where R is one or more of Li, Na, and K; 1-10% by mass of RO, where R is one or more of Ca, Sr, and Ba; 1-8% by mass of Al2O3; 0.05-0.3% by mass of CeO2; 0.05-0.5% by mass of AO, where A is one or more of Ag, Cu, or Au; and 0.05-0.7% by mass of Sb2O3; and cutting the photosensitive glass blank into multiple photosensitive glasses of preset sizes.

[0101] Depending on the type of photosensitive metal ion, different melting atmospheres need to be selected. Photosensitive glass containing Ag ions can melt in a neutral air atmosphere. This means that in this environment, the oxygen concentration does not significantly affect the presence of Ag ions, which can remain stable in the glass without oxidation or reduction reactions. Photosensitive glass containing Cu ions can melt in a reducing atmosphere, which is an environment containing less oxygen, and may even contain reducing gases (such as hydrogen or carbon monoxide). This helps prevent Cu+ from being oxidized to Cu2+. In a reducing atmosphere, Cu ions can maintain a +1 oxidation state, which is necessary to maintain the specific properties of the glass. Photosensitive glass containing Au ions can melt in an oxidizing atmosphere, which is an environment with a higher oxygen concentration. In this environment, Au ions can remain stable and are not easily reduced to metallic gold because gold is chemically inert and does not readily react with oxygen.

[0102] The above preset dimensions can be set according to the size of the electronic device. For example, if it is used to manufacture the back cover of a mobile phone battery, the preset dimensions can be 140mm to 160mm in length, 50mm to 60mm in width, and 0.5mm to 1.0mm in thickness.

[0103] Step 202: Apply a light-blocking film to the photosensitive glass. The light-blocking film consists of multiple areas, and different areas have different transmittance of ultraviolet rays.

[0104] Step 203: Expose the photosensitive glass to ultraviolet light on the side of the light-blocking sheet away from the photosensitive glass.

[0105] Specifically, regarding steps 202 and 203 above, in the photosensitive glass composition, Sb₂O₃ acts as a reducing agent, and CeO₂ acts as a photosensitizer. The reducing agent adjusts the oxidation state of the photosensitizer in the photosensitive glass, thereby adjusting the Ce⁴⁺ / Ce³⁺ balance during the photosensitive glass melting process. See also... Figure 9In the above components, during the melting process of the photosensitive glass, Ce4+ ions are reduced to Ce3+ ions by Sb2O3. Under ultraviolet light exposure, the photosensitizer Ce3+ ions absorb ultraviolet radiation and release electrons (e-). - These electrons can be received by photosensitive metal ions A+ in the photosensitive glass, causing the photosensitive metal ions A+ to be reduced to photosensitive metal atoms A. 0 Because the greater the intensity of ultraviolet radiation exposure, the higher the concentration of photosensitive metal atoms within the photosensitive glass, therefore, see... Figure 10 To form photosensitive metal atoms of varying concentrations within the photosensitive glass, a light-blocking film can be attached to it. This film comprises multiple regions, each with different ultraviolet transmittance. Thus, when the photosensitive glass is exposed to ultraviolet light from the side of the light-blocking film furthest from the glass, the glass can simultaneously receive ultraviolet light of varying intensities, thereby forming photosensitive metal atoms of different concentrations within the glass.

[0106] For example, during the ultraviolet exposure stage, the energy density of the ultraviolet light source is between the eighth preset value and the ninth preset value, with the eighth preset value being between 4.5 microwatts per square centimeter and 5.5 microwatts per square centimeter, and the ninth preset value being between 19.5 microwatts per square centimeter and 20.5 microwatts per square centimeter; the duration of ultraviolet exposure is between the tenth preset value and the eleventh preset value, with the tenth preset value being between 10 minutes and 30 minutes, and the eleventh preset value being between 50 minutes and 60 minutes.

[0107] If the energy density of the ultraviolet light source is less than the eighth preset value, the concentration of photosensitive metal atoms formed inside the photosensitive glass will be low. This results in a lower concentration of photosensitive metal colloidal particles formed by the aggregation of photosensitive metal atoms within the photosensitive glass during subsequent heating, leading to a lighter color, close to transparent. If the energy density of the ultraviolet light source is greater than the ninth preset value, saturation will occur, and the concentration of photosensitive metal atoms inside the photosensitive glass will no longer change with the increase of the energy density of the ultraviolet light source. The eighth preset value can be taken as 4.5 μw / cm². 2 5μw / cm 2 Or 5.5 μw / cm 2 The ninth preset value can be 19.5 μw / cm. 2 20μw / cm 2 20.5 μw / cm 2 .

[0108] Similarly, if the UV exposure time is less than the tenth preset value, the concentration of photosensitive metal atoms formed inside the photosensitive glass is relatively low. This results in a lower concentration of photosensitive metal colloidal particles formed by the aggregation of photosensitive metal atoms within the photosensitive glass during subsequent heating, leading to a lighter color, close to transparent. If the UV exposure time exceeds the eleventh preset value, saturation will occur, and the concentration of photosensitive metal atoms inside the photosensitive glass will no longer change with the increase of the energy density of the UV light source. The tenth preset value can be 10 min, 20 min, or 30 min; the eleventh preset value can be 40 min, 50 min, or 60 min.

[0109] For example, the wavelength range of the ultraviolet light source can be between 310 nm and 320 nm to match the Ce photosensitive agent in the photosensitive glass. 3+ The absorption wavelength is 315nm.

[0110] For example, the energy density of an ultraviolet light source can be as low as 5 μW / cm². 2 ~20μw / cm 2 The duration of ultraviolet (UV) exposure can range from 10 to 60 minutes. More specifically, the energy density of the UV light source can reach 12 μw / cm². 2 ~20μw / cm 2 The duration of ultraviolet exposure can range from 20 to 60 minutes, with a half-peak width of 5 nm to 10 nm.

[0111] For example, the concentration of photosensitive metal colloidal particles formed by the aggregation of photosensitive metal atoms in the photosensitive glass is between 0.1wt% and 0.2wt%, and the photosensitive glass can exhibit bright and colorful colors.

[0112] It is important to note that the energy density and exposure time of the ultraviolet (UV) light source jointly determine the number of photosensitive metal ions (A+) inside the photosensitive glass that are reduced to photosensitive metal atoms (A) during UV exposure. Different photosensitive metal ions (A+) have varying reducing power; therefore, different UV exposure intensities (including energy density and time) are required for photosensitive glasses containing different A+ ions. For example, the Au+ ion has the lowest reducing power, thus requiring a higher UV energy density and a longer exposure time; while the Cu+ ion has the highest reducing power, requiring a lower UV energy density and a shorter exposure time.

[0113] In this embodiment, a suitable light-blocking film can be selected or prepared according to the final designed color pattern or gradient color pattern. Optionally, the light-blocking film can be a light-blocking plate with inconsistent thickness. The thicker the light-blocking plate, the lower the transmittance of ultraviolet rays. Optionally, the light-blocking film can be a light-blocking plate with uniform thickness, and the light-blocking plate is coated with a light-blocking layer with gradient transmittance. The light-blocking plate can be a latex / rigid light-blocking plate, and the light-blocking layer can be a light-blocking ink with gradient transmittance. Optionally, the light-blocking film can be a film that has undergone color reversal treatment.

[0114] In one implementation, multiple regions of the light-blocking sheet include ink-covered regions, or a specific region on the side of the photosensitive glass that is attached to the light-blocking sheet is coated with ink. Since black ink absorbs most ultraviolet light, the photosensitive metal particles in the ink-covered or ink-coated regions of the photosensitive glass will not be reduced to photosensitive metal atoms. Therefore, after fabrication, the ink-covered or ink-coated regions of the photosensitive glass are colorless and transparent.

[0115] In another implementation, the ultraviolet transmittance of the light-blocking film gradually increases in the first direction. That is, the intensity of ultraviolet light received by the photosensitive glass in the first direction gradually increases. After exposure, the concentration of photosensitive metal atoms in the photosensitive glass in the first direction also gradually increases. After preparation, the color of the photosensitive glass gradually deepens in the first direction, exhibiting a gradient color.

[0116] In another implementation, the ultraviolet transmittance of the light-blocking film exhibits irregular changes. The intensity of ultraviolet light received by the photosensitive glass is irregular, and after exposure, the concentration of photosensitive metal atoms within the photosensitive glass also changes irregularly. After preparation, the color of the photosensitive glass exhibits irregular changes.

[0117] Step 204: Remove the light-blocking film.

[0118] After UV exposure, remove the light-blocking film. If a specific area on the side of the photosensitive glass covered with the light-blocking film is coated with ink, no treatment is needed; the ink will automatically evaporate during subsequent heating.

[0119] Step 205: Perform heat treatment on the exposed photosensitive glass.

[0120] In this embodiment, photosensitive glass containing photosensitive metal ions is used as the substrate. The photosensitive glass is exposed to ultraviolet light of varying intensities. The energy received by the photosensitive glass varies, resulting in different concentrations of photosensitive metal atoms within the exposed glass. During the heat treatment of the exposed photosensitive glass, the photosensitive metal atoms migrate and aggregate to form photosensitive metal colloidal particles of a certain size. These particles exhibit a specific color; and different concentrations of photosensitive metal atoms can form photosensitive metal colloidal particles of different concentrations. Therefore, photosensitive metal colloidal particles of different sizes and concentrations can exhibit different colors. Thus, areas with different concentrations of photosensitive metal colloidal particles within the prepared glass cover can exhibit different colors, resulting in a variety of colors, such as gradients or irregular color changes. This allows for a controllable appearance of the glass cover, and the preparation method is simple. Furthermore, because the photosensitive metal colloidal particles are formed within the glass cover, they can isolate the influence of the external environment, making the color on the glass cover more stable and durable.

[0121] For example, during the heat treatment stage, the heat treatment temperature is between the twelfth and thirteenth preset values, with the twelfth preset value being between 450°C and 550°C and the thirteenth preset value being between 600°C and 650°C; the heat treatment time is between the fourteenth and fifteenth preset values, with the fourteenth preset value being between 0.5 hours and 1.5 hours and the fifteenth preset value being between 2 hours and 4 hours.

[0122] It is feasible; the heat treatment temperature can be 500℃~650℃, and the heat treatment time can be 1h~3h.

[0123] After exposure, the photosensitive glass is placed in a heat treatment furnace. After heat treatment, the areas that receive more ultraviolet energy will show a darker color, while the areas that receive less ultraviolet energy or are not exposed will show a lighter color or be transparent.

[0124] It is important to note that the temperature and time of the heat treatment together determine the size of the colloidal particles formed by the aggregation of photosensitive metal atoms into a photosensitive metal colloid within the photosensitive glass. The amount of heat required for migration and aggregation varies depending on the size of the photosensitive metal atoms; the larger the atom, the more heat is required. For example, Au atoms are larger, requiring more thermal energy for migration and aggregation, thus necessitating higher heat treatment temperatures and longer treatment times. Conversely, Cu atoms are smaller, requiring lower heat treatment temperatures and shorter treatment times.

[0125] For example, the size of the photosensitive metal colloidal particles is between a fifth preset value and a sixth preset value, where the fifth preset value is between 5nm and 15nm and the sixth preset value is between 140nm and 160nm. Alternatively, the size of the photosensitive metal colloidal particles can be between 10nm and 150nm, at which point they exhibit more vibrant and diverse colors.

[0126] Step 206: Perform chemical strengthening treatment on the heat-treated photosensitive glass.

[0127] In this embodiment, the heat-treated photosensitive glass is chemically strengthened to form a chemically strengthened layer on the surface of the photosensitive glass. The chemically strengthened layer refers to the compressive stress layer formed on the surface of the photosensitive glass through an ion exchange process. The presence of the compressive stress layer on the surface of the photosensitive glass makes it more difficult for the photosensitive glass to crack when subjected to external force. Therefore, chemical strengthening treatment can improve the mechanical strength and impact resistance of the photosensitive glass.

[0128] For example, the heat-treated photosensitive glass is placed in a sodium-containing molten salt for a first chemical strengthening treatment; the photosensitive glass after the first chemical treatment is placed in a potassium-containing molten salt for a second chemical strengthening treatment.

[0129] In this embodiment, the process of improving the physical properties of photosensitive glass is mainly achieved through two chemical strengthening treatments.

[0130] First chemical strengthening treatment (Na / Li exchange layer formation): In this step, the exposed photosensitive glass is placed in a molten salt containing sodium, typically pure NaNO3 or a mixture of NaNO3 and KNO3 (NaNO3 content must be ≥60wt%). Under this high-temperature environment (350-450℃), lithium ions (Li+) on the photosensitive glass surface exchange with sodium ions (Na+) in the molten salt. Because sodium ions have a larger radius than lithium ions, they form a compressive stress layer on the surface of the photosensitive glass after entering, which is the so-called Na / Li exchange layer. This process takes between 0.1 and 5 hours.

[0131] Second Chemical Strengthening Treatment (K / Na Exchange Layer Formation): After the first chemical strengthening, the photosensitive glass undergoes a second chemical strengthening treatment, this time in a potassium-containing molten salt. This can be pure KNO3 or a mixture of NaNO3 and KNO3 (KNO3 content must be ≥80wt%). At a temperature of 350-450℃, sodium ions (Na+) on the photosensitive glass surface exchange with potassium ions (K+) in the molten salt. Since potassium ions have a larger radius than sodium ions, their entry into the photosensitive glass surface further increases the compressive stress, forming a K / Na exchange layer. The second chemical strengthening process is relatively short, typically between 0.1 and 2 hours.

[0132] The above-mentioned chemical strengthening treatment can significantly improve the mechanical strength and impact resistance of photosensitive glass.

[0133] Step 207: Apply a coating to the strengthened photosensitive glass.

[0134] Anti-fingerprint (AF) coating is a process that involves applying a layer of nano-chemical materials to the surface of photosensitive glass. The principle is to minimize the surface tension of the glass by coating it with these nano-chemical materials, thereby reducing the contact area between dust and the photosensitive glass surface, making it resistant to oil and fingerprints. This treatment allows the photosensitive glass to maintain a clean and bright appearance for a long time. This coating process typically uses a vacuum evaporation coating method.

[0135] It is worth noting that steps 206 and 207 above can be performed or not in the actual preparation process.

[0136] It is worth noting that during the heating process of the exposed photosensitive glass, the lithium metasilicate crystals present in the photosensitive glass will precipitate with photosensitive metal atoms as crystal nuclei, with a crystallinity of 1-5%.

[0137] The preparation parameters of the preparation methods of Examples 1 to 12 in the above glass cover plate embodiments are described below.

[0138] Table 5 below shows the corresponding manufacturing parameters for the three different glass cover plates shown in Table 1 above.

[0139] Table 5

[0140]

[0141]

[0142] Table 6 below shows the corresponding manufacturing parameters for the three different glass cover plates shown in Table 2 above.

[0143] Table 6

[0144]

[0145] Table 7 below shows the corresponding manufacturing parameters for the three different glass cover plates shown in Table 3 above.

[0146] Table 7

[0147]

[0148]

[0149] Table 8 below shows the corresponding manufacturing parameters for the three different glass cover plates shown in Table 4 above.

[0150] Table 8

[0151]

[0152] It should be understood that the above examples are provided to help those skilled in the art understand the embodiments of this application, and are not intended to limit the embodiments of this application to the specific values ​​or scenarios exemplified. Those skilled in the art can obviously make various equivalent modifications or variations based on the above examples, and such modifications or variations also fall within the scope of the embodiments of this application.

[0153] The above description is merely a specific implementation of the embodiments of this application, but the protection scope of the embodiments of this application is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in the embodiments of this application should be included within the protection scope of the embodiments of this application. Therefore, the protection scope of the embodiments of this application should be determined by the protection scope of the claims.

Claims

1. A glass cover plate characterized by, The glass cover plate is made of photosensitive glass, and the photosensitive glass comprises photosensitive metal ions; The glass cover plate comprises at least one color region, and each color region comprises at least one color; The glass cover plate of the color region comprises photosensitive metal colloidal particles, and the concentration of the photosensitive metal colloidal particles is different in different color regions of the glass cover plate, and the photosensitive metal colloidal particles are gathered by photosensitive metal atoms obtained by reduction of the photosensitive metal ions.

2. The glass cover sheet of claim 1, wherein, The color of the glass cover plate gradually deepens in the first direction; or the color of the glass cover plate presents irregular color change.

3. The glass cover sheet of claim 1 or 2, wherein, The glass cover plate further comprises at least one transparent region, and the glass cover plate of the transparent region comprises photosensitive metal ions at a concentration greater than that of the glass cover plate of the color region.

4. The glass cover sheet of claim 3, wherein, The light transmittance of the transparent region to visible light is greater than or equal to a first preset value, and the light transmittance of the color region to visible light is less than or equal to a second preset value, the first preset value is between 85% and 95%, and the second preset value is between 25% and 35%.

5. The glass cover sheet of any one of claims 1-4, wherein, The concentration of the photosensitive metal colloidal particles is between a third preset value and a fourth preset value, the third preset value is between 0.01 mass percent and 0.02 mass percent, and the fourth preset value is between 0.19 mass percent and 0.21 mass percent.

6. The glass cover sheet of any of claims 1 or 5, wherein, The size of the photosensitive metal colloidal particles is between a fifth preset value and a sixth preset value, the fifth preset value is between 5 nanometers and 15 nanometers, and the sixth preset value is between 140 nanometers and 160 nanometers.

7. The glass cover sheet of any one of claims 1-6, wherein, The photosensitive metal colloidal particles are at least one of Ag, Cu, and Au.

8. The glass cover sheet of any one of claims 1-7, wherein, The multiple colors of the color region correspond to a luminance value between 5 and 60, a red-green axis chroma value between -80 and 80, and a yellow-blue axis chroma value between -80 and 80 in the Lab color space.

9. A method of making a glass cover plate, characterized by, The method comprises: Providing photosensitive glass comprising photosensitive metal ions; Applying a light-blocking sheet on the photosensitive glass, the light-blocking sheet comprising multiple regions with different ultraviolet transmittances; Exposing the photosensitive glass to ultraviolet light on the side of the light-blocking sheet away from the photosensitive glass; Removing the light-blocking sheet; Performing heat treatment on the exposed photosensitive glass.

10. The method of claim 9, wherein, The light-blocking sheet is a light-blocking plate with inconsistent thickness, a light-blocking plate with consistent thickness and a light-blocking layer with gradually changing transmittance coated on the light-blocking plate, or a film after reverse color processing.

11. The method according to claim 9 or 10, characterized in that, The multiple regions of the light-blocking sheet comprise ink-covered regions, or a specific region of the light-blocking sheet applied to the photosensitive glass is coated with ink.

12. The method according to any one of claims 9 to 11, characterized in that, The ultraviolet transmittance of the light-blocking sheet gradually increases in the first direction, or the ultraviolet transmittance of the light-blocking sheet presents irregular changes.

13. The method according to any one of claims 9 to 12, characterized in that, In the ultraviolet exposure stage, the energy density of the ultraviolet light source is between an eighth preset value and a ninth preset value, the eighth preset value is between 4.5 microwatts per square centimeter and 5.5 microwatts per square centimeter, and the ninth preset value is between 19.5 microwatts per square centimeter and 20.5 microwatts per square centimeter. The length of the ultraviolet exposure is between a tenth preset value and an eleventh preset value, the tenth preset value is between 10 minutes and 30 minutes, and the eleventh preset value is between 50 minutes and 60 minutes.

14. The method according to any one of claims 9 to 13, characterized in that, In the heat treatment stage, the temperature of the heat treatment is between a twelfth preset value and a thirteenth preset value, the twelfth preset value is between 450 DEG C and 550 DEG C, and the thirteenth preset value is between 600 DEG C and 650 DEG C. The time of the heat treatment is between a fourteenth preset value and a fifteenth preset value, the fourteenth preset value is between 0.5 hours and 1.5 hours, and the fifteenth preset value is between 2 hours and 4 hours.

15. The method according to any one of claims 9 to 14, characterized in that, The providing of the photosensitive glass comprises: melting, casting and annealing according to a glass formula to obtain a photosensitive glass blank, wherein the glass formula comprises: 50-70 mass percent of SiO2, 20-30 mass percent of R2O, R being one or more of Li, Na and K; 1-10 mass percent of RO, R being one or more of Ca, Sr and Ba; 1-8 mass percent of Al2O3; 0.05-0.3 mass percent of CeO2; 0.05-0.5 mass percent of AO, A being one or more of Ag, Cu and Au; and 0.05-0.7 mass percent of Sb2O3. The photosensitive glass blank is cut into photosensitive glasses of a plurality of preset sizes.

16. The method according to any one of claims 9 to 15, characterized in that, After the heat treatment of the exposed photosensitive glass, the method further comprises: chemically strengthening the heat-treated photosensitive glass; coating the strengthened photosensitive glass.

17. The method of claim 16, wherein, The chemical strengthening of the heat-treated photosensitive glass comprises: placing the heat-treated photosensitive glass in a sodium-containing molten salt for a first chemical strengthening treatment; placing the photosensitive glass after the first chemical treatment in a potassium-containing molten salt for a second chemical strengthening treatment.

18. An electronic device, comprising: The method comprises: the glass cover plate according to any one of the preceding claims 1-8.

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