Glass cover plate and display device

Abstract

The utility model provides a glass cover plate and display equipment. According to the glass cover plate, a plurality of dark area stripes which are arranged at intervals and have the micron-order width size are formed in the glass cover plate in the plate surface direction of the glass cover plate, the light transmittance of the dark area stripes is smaller than or equal to 15%, light-transmitting areas are formed between the dark area stripes, and the light transmittance of the light-transmitting areas is larger than or equal to 85%.

Description

TECHNICAL FIELD

[0001] The present application relates to the display field, and in particular to a glass cover plate and a display device. BACKGROUND

[0002] In the use process of electronic devices such as computers or mobile phones, it is easy to be peeped by others in public places, thereby causing company information leakage or personal privacy exposure. In order to better maintain information security, anti-peep display technology appears. At present, the anti-peep display effect in the industry is mainly realized by pasting an anti-peep film on the surface of the screen. The anti-peep film can realize anti-peep mainly because it is internally provided with an anti-peep grating structure. The anti-peep grating structure is composed of a periodic transparent and opaque grating. Within a certain angle in the forward direction, light can be transmitted to realize content visibility. After exceeding a certain angle, the light is blocked by the opaque grating part to form an invisible effect. The height of the anti-peep grating structure is 60-110 μm, which is mainly composed of photocurable resin or photocurable glue, and the material is relatively soft. A polyethylene terephthalate (PET) layer is usually used to support the upper and lower parts to add a hardening layer and other laminated structures. In the long-term use process, there are problems of interface separation and structure deformation, and the overall reliability is poor and the service life is low. UTILITY MODEL CONTENT

[0003] The present application provides a glass cover plate and a display device to improve the reliability of the anti-peep structure while realizing the anti-peep effect.

[0004] In a first aspect, the present application provides a glass cover plate, a plurality of dark area stripes with micron-level width size are formed in the glass cover plate along the plate surface direction and in the glass cover plate, the light transmittance of the dark area stripe is less than or equal to 15%, and the light transmittance of the transparent region between the dark area stripes is greater than or equal to 85%.

[0005] The glass cover plate of the present application has a plurality of dark area stripes formed inside. The light transmittance of the dark area stripe is low, and the light transmittance of the transparent region is high. The dark area stripe and the transparent region are alternately arranged to form a grating structure, thereby realizing the anti-peep effect. Since the anti-peep structure is arranged inside the glass and is an integral structure with the glass, there are no problems of structure deformation and interface separation in the long-term use process, and the reliability is high, and the service life is consistent with that of the glass cover plate. Therefore, the glass cover plate of the present application integrates the anti-peep function inside the glass, replaces the anti-peep film, does not thicken, greatly improves the reliability, and improves the reliability and service life of the anti-peep structure while realizing the anti-peep effect.

[0006] In addition, the conventional privacy film cannot be applied to the folding screen electronic device because it will be separated from the display screen during the folding process. The glass cover plate of the present application can be applied to the folding screen electronic device because the privacy structure is formed inside the glass, and the use of an additional privacy film can be avoided. Therefore, the glass cover plate of the present application can be applied to the folding screen electronic device, and will not be separated from the display screen during the repeated folding process.

[0007] In an implementation manner, the width T of each dark area stripe is 2-30 μm in the plate surface direction of the glass cover plate. The width of each dark area stripe is in the range of 2-30 μm, which can form a privacy grating. Within a certain angle in the forward direction, light can penetrate to realize the display function. At the same time, the width of the dark area stripe is also avoided to be too large, which can cause the problem of unclear forward display.

[0008] In an implementation manner, each dark area stripe contains a crystal phase. The crystal phase is formed by precipitation from the inside of the glass cover plate. The dark area stripe is formed by the crystal phase precipitated from the glass, which is formed in the glass and can be microcrystalline. The crystal phase can be better combined with the light transmission area of the glass to form a more stable grating structure.

[0009] In an implementation manner, the distance P between any two adjacent dark area stripes is 20-340 μm in the plate surface direction of the glass cover plate. The distance between the dark area stripes is kept in the range of 20-340 μm, which can make most of the light penetrate from this area and avoid the influence of the setting of the dark area stripe on the display function of the glass cover plate.

[0010] In an implementation manner, the width T of each dark area stripe is the same in the plate surface direction of the glass cover plate; and the distance P between any two adjacent dark area stripes is the same in the plate surface direction of the glass cover plate, so as to ensure the consistency of the privacy effect of the glass cover plate.

[0011] In an implementation manner, the height h of each dark area stripe is 30-600 μm in the thickness direction of the glass cover plate. When the height of each dark area stripe satisfies 30-600 μm, it can be ensured that the light penetration can be observed within a certain angle in the forward direction, and the light penetration can be blocked after a certain angle due to the repeated shielding of the multiple dark area stripes.

[0012] In an implementation manner, each dark area stripe is perpendicular to the plate surface of the glass cover plate, so as to ensure the effect of forward observation.

[0013] In an implementation manner, the glass cover plate is a rectangular structure, and the dark area stripe is parallel to the length direction of the glass cover plate or parallel to the width direction of the glass cover plate. The dark area stripe is parallel to the width direction of the glass cover plate or parallel to the width direction of the glass cover plate, which can facilitate the processing and manufacturing, and can ensure that the light can be observed in the forward direction and the light can be shielded in the side direction.

[0014] In an implementation, the volume content of the crystalline phase in the light-transmitting region is less than or equal to 10% in the glass cover plate. The light-transmitting region can be all glass phase or contain only a small amount of crystalline phase to achieve high light transmission. In addition, the crystalline phase corresponding to the dark region stripe in the glass cover plate can be precipitated from the glass phase, thereby forming an integrated structure with the glass phase.

[0015] In an implementation, the thickness of the glass cover plate is 30-600 μm. Compared with the glass cover plate of the conventional display screen, the glass cover plate of the present application does not thicken and is suitable for the display screen of the conventional electronic device.

[0016] In a second aspect, the present application provides a display device, which comprises a display screen and the glass cover plate of the present application arranged on the surface of the display screen.

[0017] The display device of the present application includes but is not limited to mobile phones, folding mobile phones, computers, tablets and other devices.

[0018] The technical effects achieved by the above-mentioned second aspect can be referred to the corresponding effect description in the above-mentioned first aspect, which will not be repeated here.

[0019] In the above-mentioned possible implementations of the present application, the data such as the light transmittance of the dark region stripe, the light transmittance of the light-transmitting region, the width of the dark region stripe, the pitch of the dark region stripe, the height of the dark region stripe and other data should be understood as within the scope defined by the present application within the range of engineering measurement error. BRIEF DESCRIPTION OF DRAWINGS

[0020] Figure 1 A structural schematic diagram of a glass cover plate provided by an embodiment of the present application;

[0021] Figure 2 An exposure, nucleation and crystallization process of a glass cover plate provided by an embodiment of the present application;

[0022] Figure 3 A light exposure process schematic diagram provided by an embodiment of the present application.

[0023] REFERENCE SIGNS

[0024] 10-glass cover plate; 10a-glass wafer; 11-dark region stripe; 12-light-transmitting region; 21-mask. DETAILED DESCRIPTION

[0025] In order to make the purpose, technical solutions and advantages of the present application more clear, the present application will be further described in detail below with reference to the drawings.

[0026] The terminology used in the following embodiments is for the purpose of describing particular embodiments only and is not intended to be limiting of this application. As used in the specification and appended claims of this application, the singular expressions “a,” “an,” “the,” “the,” and “this” are intended to also include expressions such as “one or more,” unless the context clearly indicates otherwise.

[0027] References to "one embodiment" or "some embodiments" as described in this specification mean that one or more embodiments of this application include a specific feature, structure, or characteristic described in connection with that embodiment. Therefore, the phrases "in one embodiment," "in some embodiments," "in other embodiments," "in still other embodiments," etc., appearing in different parts of this specification do not necessarily refer to the same embodiment, but rather mean "one or more, but not all, embodiments," unless otherwise specifically emphasized. The terms "comprising," "including," "having," and variations thereof mean "including but not limited to," unless otherwise specifically emphasized.

[0028] To address the issue of low reliability in existing privacy films, this application provides a glass cover that integrates the glass and the privacy structure by forming an alternating light and dark privacy grating structure inside it, thereby improving the reliability of the privacy structure while achieving privacy protection.

[0029] Figure 1 This is a schematic diagram of the structure of a glass cover plate according to one embodiment of this application. Figure 1 As shown, the glass cover 10 of this embodiment has multiple dark stripes 11 inside. The space between adjacent dark stripes 11 is a light-transmitting area 12. The light transmittance of each dark stripe 11 is less than or equal to 15%, for example, less than or equal to 14%, or even less than or equal to 13%. The light transmittance of the light-transmitting area 12 is greater than or equal to 85%, for example, greater than or equal to 86%, or even greater than or equal to 89%. Thus, the light-transmitting area 12 between the dark stripes 11 can form a privacy grating structure. In this embodiment, the privacy structure of the glass cover is formed by the dark stripes 11 and the transparent area 12 inside the glass cover itself. The privacy structure is located inside the glass cover and is an integral structure with it. During long-term use, there will be no structural deformation or interface separation problems, resulting in high reliability and a service life consistent with the glass cover.

[0030] In the glass cover of this embodiment, the angle between each dark area stripe 11 and the perpendicular line to the surface of the glass cover 10 can be 0-2° to ensure that the observer can observe the displayed content in a direction perpendicular to the glass panel 10. Figure 1As shown, each dark area stripe 11 can be perpendicular to the plate surface of the glass cover plate 10, i.e., the angle between each dark area stripe 11 and the perpendicular line of the plate surface of the glass cover plate 10 is 0°, so as to ensure the best viewing effect and realize the privacy function. The glass cover plate 10 can be a rectangular structure plate, and each dark area stripe 11 can be parallel to the length direction of the glass cover plate 10 or parallel to the width direction of the glass cover plate 10. In addition, the structure of the glass cover plate 10 can also be a circular plate. When the glass cover plate 10 is a circular plate, each dark area stripe 11 can be parallel to the diameter of the circular plate.

[0031] Referring to Figure 1 , along the plate surface direction of the glass cover plate 10, the width T of each dark area stripe 11 is 2-30 μm. Exemplarily, the width T of each dark area stripe 11 can be 2 μm, 3 μm, 5 μm, 7 μm, 9 μm, 10 μm, 12 μm, 14 μm, 15 μm, 17 μm, 18 μm, 20 μm, 22 μm, 24 μm, 26 μm, 28 μm, or 30 μm. When the width of each dark area stripe 11 is within the above range, the formed privacy grating can transmit light within a certain angle in the forward direction to realize the display function. The above range can avoid that the width of the dark area stripe 11 is too small, causing high light transmittance, and light leakage occurs when observed from the side, which affects the privacy effect. At the same time, it also avoids that the width of the dark area stripe 11 is too large, causing low light transmittance, and the problem of unclear display in the forward direction.

[0032] The distance P between any two adjacent dark area stripes 11 is 20-340 μm. Exemplarily, the distance P between the dark area stripes 11 can be 20 μm, 30 μm, 50 μm, 70 μm, 90 μm, 100 μm, 120 μm, 140 μm, 150 μm, 170 μm, 180 μm, 200 μm, 220 μm, 240 μm, 260 μm, 280 μm, 300 μm, 320 μm, or 340 μm. The distance between the dark area stripes 11 affects the viewing of the display content. When the distance between the dark area stripes 11 is too small, the transmitted light is less, which affects the normal viewing of the display content. When the distance between the dark area stripes 11 is too large, light leakage occurs when observed from the side, which affects the privacy effect. Therefore, when the distance between the dark area stripes 11 is 20-340 μm, normal viewing can be realized without affecting the privacy effect.

[0033] The height h of each dark area stripe 11 along the thickness direction of the glass cover plate is 30-600 μm. Exemplarily, the height h of the dark area stripe can be 30 μm, 50 μm, 70 μm, 90 μm, 100 μm, 130 μm, 150 μm, 170 μm, 200 μm, 220 μm, 250 μm, 280 μm, 300 μm, 320 μm, 350 μm, 400 μm, 450 μm, 500 μm, 550 μm, or 600 μm. If the height h of the dark area stripe 11 is too high, the normal light transmission will be affected. If the height h of the dark area stripe 11 is too low, the privacy protection effect will be affected. Therefore, when the height h of each dark area stripe 11 is 30-600 μm, the light transmission can be observed within a certain angle in the forward direction, and the light transmission can be blocked after a certain angle due to the repeated shielding of the dark area stripes, thereby achieving effective privacy protection.

[0034] Optionally, along the plate surface direction of the glass cover plate 10, the widths T of all the dark area stripes 11 are the same, and the intervals P of all the dark area stripes 11 are the same, so as to ensure the consistency of the privacy protection effect of the glass cover plate.

[0035] It can be understood that in other embodiments, the widths T of the dark area stripes 11 can also be completely different or partially the same. The intervals P between the dark area stripes 11 can also be completely different or partially the same. The specific width of the dark area stripe 11 and the specific interval between the dark area stripes 11 can be designed according to the specific implementation scene.

[0036] Continuing to refer to Figure 1 The thickness of the glass cover plate 10 of the embodiment of the application is 30-600 μm. In the thickness direction of the glass cover plate 10, the height h of the dark area stripe 11 can be less than the thickness of the glass cover plate, or can be equal to the thickness of the glass cover plate. When the height h of the dark area stripe 11 is less than the thickness of the glass cover plate, the privacy grating structure formed by the dark area stripe 11 and the transparent area 12 between the dark area stripes 11 can occupy part of the glass cover plate 10 in the thickness direction, and the part of the glass cover plate 10 below is still a light transmission area. The composition and the light transmission rate of the part of the light transmission area and the transparent area 12 between the dark area stripes 11 are the same.

[0037] In the glass cover plate of the embodiment of the application, each dark area stripe 11 contains a crystal phase and can also contain a glass phase. The transparent area 12 does not contain a crystal phase, but only contains a glass phase, or contains a very small amount of a crystal phase, so as not to affect the light transmission rate of the transparent area. Exemplarily, the volume content of the crystal phase in the transparent area 12 is less than or equal to 10%, so as to be suitable for the light transmission rate of the transparent area 12 being greater than or equal to 85%. The crystal phase corresponding to each dark area stripe 11 can be a crystal phase precipitated from the inside of the glass.

[0038] The glass cover plate of the embodiments of the present application can be made of photosensitive glass. Exemplarily, the photosensitive agent and nucleation element can be added in the composition of the glass cover plate to form dark zone stripes inside the glass by exposure, nucleation and crystallization, thereby forming a privacy structure.

[0039] As an exemplary illustration, the forming method of the glass cover plate of the present application will be described in detail below.

[0040] In one embodiment, the manufacturing method of the glass cover plate of the present application includes the following steps: batching, melting and forming, annealing, exposure, nucleation, crystallization, tempering and post-processing. The melting and forming can include float method, continuous melting, down-drawing, casting and the like. After annealing, cutting, edge grinding, cleaning, grinding and the like can be performed to obtain a glass cover plate with a desired size. Among them, the processes of exposure, nucleation and crystallization can be added between the processes of annealing and tempering to form dark zone stripes inside the glass cover plate.

[0041] After the crystallization is completed, tempering can be performed in the subsequent steps. Exemplarily, the tempering process can be chemical strengthening in a potassium nitrate salt melt at a temperature of 420-480℃ to form a compressive stress layer on the glass cover plate and an internal tensile stress layer. The post-processing after tempering includes but is not limited to plating, detection and the like.

[0042] Among them, the raw materials of the formed glass cover plate can include the following components: SiO2, Al2O3, ZnO, Li2CO3, Na2CO3, K2CO3, ZrO2, Sb2O3, and photosensitive agent and nucleation metal element. The photosensitive agent can be selected from CeO2. The nucleation metal element can be selected from at least one of Cu, Au and Ag. The nucleation metal element can be added to the raw materials of the glass cover plate in the form of a compound of the above-mentioned elements, for example, can be introduced in the form of nucleation metal oxide or halide.

[0043] Under the action of light signals, the photosensitive agent can release electrons, reduce the nucleation metal element from the combined state to the metallic state, thereby providing nucleation sites in the subsequent crystallization process. The nucleation metal element obtains electrons in the nucleation process, changes from the combined state to the metallic state, becomes a nucleation site, and can form a metal cluster. In the crystallization process, a large number of crystals are formed in the metal cluster region to form a high-crystallinity light-proof structure, i.e., a dark zone stripe.

[0044] The following will be combined with Figure 2 The processes of exposure, nucleation and crystallization will be described in detail.

[0045] As Figure 2 shown in (a) of FIG. 1, the annealed glass wafer 10a contains Ce 3+ and Ag + .

[0046] AsFigure 2 As shown in Figure (b), after a mask 21 is placed on one side, the image is exposed. During exposure, ultraviolet light with a wavelength of 290-330 nm can be used. During exposure, the photosensitizer is affected by the light signal, and Ce... 3+ Electrons (e-) are released. The photomask 21 includes patterned windows through which light signals can illuminate a portion of the glass substrate 10a. The shape and size of the windows in the photomask 21 are consistent with the shape and size of the area on the glass substrate 10a illuminated by the light signal (area II in the figure). The area between the windows in the photomask 21 is a blocking area; during exposure, the light signal is blocked by the blocking area and cannot illuminate the surface of the glass substrate 10a. The shape and size of the blocking area in the photomask 21 are consistent with the shape and size of the blocked area on the glass substrate 10a (area I in the figure). Therefore, the patterned windows on the photomask 21 determine the size of the privacy grating structure generated inside the glass cover. By flexibly changing the shape of the photomask windows, privacy structures of different shapes and sizes can be fabricated in the glass panel.

[0047] like Figure 2 As shown in Figure (c), after exposure, the glass substrate 10a can undergo nucleation treatment at a temperature of 480-530℃ for 0.5-8 hours. During the nucleation treatment, the nucleated metal ions Ag in the glass substrate 10a... + After receiving electrons, it becomes atomic Ag. Ag atoms can form Ag clusters through physical or chemical bonding forces.

[0048] like Figure 2 As shown in Figure (d), the nucleated glass substrate 10a is subjected to crystallization treatment. The crystallization temperature is 580-730℃, and the crystallization time is 0.5 hours-24 hours. During the crystallization process, due to the presence of Ag cluster nucleation sites in region II of the glass cover, the nucleation barrier in region II is significantly reduced, allowing large-scale crystallization of the glass components in region II, forming a highly crystalline opaque structure. This opaque structure corresponds to dark area stripes 11, meaning the width of region II is the width T of dark area stripes 11. Region I of the glass cover, lacking or containing very few Ag cluster nucleation sites, cannot meet the grain precipitation conditions at the crystallization temperature of this embodiment, or only a small number of grains precipitate, thus forming a low-crystallinity region, which corresponds to the transparent region 12, thereby maintaining transparency. Therefore, the width of region I corresponds to the spacing P between dark area stripes 11. After crystallization treatment, a structure resembling... Figure 2 The integrated privacy grating structure shown in Figure (e) is an example of this.

[0049] During the exposure process, the height of the resulting dark area stripes can be controlled by adjusting process parameters such as the intensity of the light signal used for exposure and the exposure time.

[0050] In the embodiment, in addition to using a mask to expose light, the photosensitive agent can also be subjected to a sensitization reaction by directly irradiating it with a laser. The laser irradiation method is shown in the embodiment. During laser irradiation, the width of the laser irradiation is the width of the dark zone stripe 11 formed. Therefore, during laser irradiation, the irradiation can be performed according to the preset width and position of the dark zone stripe 11. After laser irradiation, metal clusters are formed in the laser irradiation area, and crystallization is achieved. Figure 3

[0051] In the laser irradiation process, the height h of the dark zone stripe can be controlled by controlling the power and irradiation time of the laser.

[0052] The above is only a specific embodiment of the present application, but the protection scope of the present application is not limited thereto. Any person skilled in the art can easily think of changes or replacements within the technical scope disclosed in the present application, which should be covered by the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the protection scope of the claims.​

Claims

1. A glass cover plate characterized by, A plurality of dark band stripes with micron-level width are formed in the glass cover plate in the plate surface direction of the glass cover plate, the light transmittance of the dark band stripes is less than or equal to 15%, and the light transmittance of the light transmission regions between the dark band stripes is greater than or equal to 85%.

2. The glass cover sheet of claim 1, wherein, The width T of each dark band stripe in the plate surface direction of the glass cover plate is 2-30 μm.

3. The glass cover sheet of claim 1 or 2, wherein, Each dark band stripe contains a crystal phase.

4. The glass cover sheet of claim 3, wherein, The crystal phase is formed by precipitation from the interior of the glass cover plate.

5. The glass cover sheet of any of claims 1-4, wherein, The distance P between any two adjacent dark band stripes in the plate surface direction of the glass cover plate is 20-340 μm.

6. The glass cover sheet of any of claims 1-5, wherein, The width T of each dark band stripe in the plate surface direction of the glass cover plate is the same, and the distance P between any two adjacent dark band stripes in the plate surface direction of the glass cover plate is the same.

7. The glass cover sheet of any of claims 1-6, wherein, The height h of each dark band stripe in the thickness direction of the glass cover plate is 30-600 μm.

8. The glass cover sheet of any of claims 1-7, wherein, Each dark band stripe is perpendicular to the plate surface of the glass cover plate.

9. The glass cover sheet of any of claims 1-8, wherein, The glass cover plate has a rectangular structure, and the dark band stripes are parallel to the length direction of the glass cover plate or parallel to the width direction of the glass cover plate.

10. The glass cover sheet of any of claims 1-9, wherein, The volume content of the crystal phase in the light transmission regions in the glass cover plate is less than or equal to 10%.

11. The glass cover sheet of any of claims 1-10, wherein, The thickness of the glass cover plate is 30-600 μm.

12. A display device, characterized by A display screen and a glass cover plate as claimed in any one of claims 1-11 arranged on the surface of the display screen. A display screen and a glass cover plate as claimed in any one of claims 1-11 arranged on the surface of the display screen.

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