Display cover plate, mask plate, display module and display device

Abstract

The utility model discloses a display cover plate, a mask, a display module and a display device, relates to the technical field of display, and can reduce or avoid a flash point phenomenon. The display cover plate comprises a substrate which comprises a first side and a second side which are opposite to each other; the substrate comprises a plurality of unit areas arranged in an array; the first side is provided with a plurality of grooves, and the lowest points of the groove bottoms of the grooves in the unit area are distributed in a scattered mode. The mask plate is used for preparing the display cover plate.

Description

Technical Field

[0001] This application relates to the field of display technology, and in particular to a display cover plate, a mask, a display module, and a display device. Background Technology

[0002] Currently, with the development and popularization of 3A technology (Anti-Glare, Anti-Fingerprint, Anti-Reflection), consumers are becoming increasingly discerning about monitor cover plates.

[0003] However, most AG (anti-glare) chips are now prepared by spraying or wet etching. Both of these methods will lead to high flash point when paired with high PPI (pixel density) displays, which will cause discomfort to users. Therefore, the flash point of the display cover is an important indicator for evaluating the quality of the cover.

[0004] In summary, how to reduce or avoid flashing on the display cover is an urgent problem to be solved. Utility Model Content

[0005] The present application provides a display cover, a mask, a display module, and a display device that can reduce or avoid flash point phenomena.

[0006] A first aspect of this application provides a display cover plate applied to a display module. The display cover plate includes a substrate, which includes a first side and a second side opposite to each other.

[0007] The substrate comprises multiple unit regions arranged in an array;

[0008] The first side has multiple grooves, and the lowest point of the groove bottom in a unit area is distributed in a scattered manner.

[0009] In some embodiments, the orthographic projection of the groove edge between adjacent grooves onto the substrate comprises a straight line; and / or,

[0010] The adjacent grooves are formed with raised sections of varying heights.

[0011] In some embodiments, the base corresponding to the groove includes a side portion and a bottom portion, the side portion being connected between the protrusion and the bottom portion, the protrusion surrounding the side portion, and the side portion surrounding the bottom portion;

[0012] The side includes a first curved surface, and the bottom includes a second curved surface;

[0013] In a plane perpendicular to the base, the angle between the tangent direction of the first surface and the plane containing the base is greater than or equal to 2.5°.

[0014] In some implementations, the ratio of the orthographic projection area of ​​the bottom on the substrate to the orthographic projection area of ​​the corresponding groove on the substrate is less than or equal to 80%.

[0015] In some embodiments, the edges between adjacent grooves include high points at both ends, and the edges between adjacent grooves include low points, with the low points located between the two ends of the edges;

[0016] On the substrate corresponding to a unit region, the maximum distance between the highest point of the edge and the second side surface of the substrate minus the minimum distance between the lowest point of the edge and the second side surface of the substrate is less than or equal to 2 μm; and / or

[0017] Within a unit area, the difference in the lowest point of the edges of multiple grooves along the substrate thickness direction is less than or equal to 1 μm; and / or

[0018] The highest point of the edge has an arc-shaped tip.

[0019] In some embodiments, the protrusion includes a smooth protrusion structure, and adjacent grooves are connected by the smooth protrusion structure.

[0020] In some implementations, the smooth protrusion structure is prepared based on an etching process.

[0021] In some implementations, the area of ​​the unit region is greater than or equal to 1 mm. 2 .

[0022] In some implementations, the shape of the orthographic projection of the groove onto the substrate includes a polygon.

[0023] In some implementations, the polygon includes irregular polygons;

[0024] At least two adjacent irregular polygons have different shapes, and / or, all irregular polygons within a unit area have different shapes.

[0025] A second aspect of this application provides a mask for preparing the display cover plate in any of the above-described technical solutions.

[0026] In some embodiments, the mask includes multiple light-transmitting areas, which are scattered within a unit area. The center point of the orthographic projection of the light-transmitting area onto the mask corresponds to the lowest point of the groove bottom; or,

[0027] The mask includes multiple light-blocking areas, which are scattered within a unit area. The center point of the orthographic projection of the light-blocking area on the mask corresponds to the lowest point of the groove bottom.

[0028] In some embodiments, the shape of the light-transmitting area includes polygons and / or circles; or,

[0029] The shape of the shaded area includes polygons and / or circles.

[0030] In some embodiments, the mask includes a plurality of repeating mask units, each mask unit including a plurality of light-blocking areas or a plurality of light-transmitting areas, and the area of ​​the mask unit is greater than or equal to 1 mm². 2 The mask unit is used to correspond to the recesses within a unit area for fabricating the display panel; and / or

[0031] The area of ​​the light-transmitting or light-blocking region ranges from 0.785 μm. 2 Up to 314μm 2 ; and / or

[0032] The distance between adjacent light-transmitting areas or adjacent light-blocking areas is greater than or equal to 3μm and less than or equal to 60μm.

[0033] A third aspect of this application provides a display module, comprising:

[0034] Display panel;

[0035] In any of the above technical solutions, the display cover is disposed on the display side of the display panel.

[0036] A fourth aspect of this application provides a display device, comprising:

[0037] The display module in any of the above technical solutions.

[0038] The beneficial effects of this application are as follows:

[0039] This application, by setting scattered grooves on the substrate, avoids the formation of steep slopes between adjacent grooves, thus preventing the formation of flash point problems. The scattered groove distribution also avoids large height differences between groove edges due to etching limitations, where some structures between adjacent grooves remain unetched, resulting in a large height span at the groove edges, thereby preventing flash point phenomena. Furthermore, the scattered distribution increases the design freedom of the grooves; different scattered groove distributions can be used for display cover plates in different usage environments. Attached Figure Description

[0040] Figure 1 A schematic partial top view of a display cover provided in an embodiment of this application;

[0041] Figure 2 A schematic partial cross-sectional view of another display cover provided in an embodiment of this application;

[0042] Figure 3 A schematic partial top view of another display cover provided in an embodiment of this application;

[0043] Figure 4 A schematic partial three-dimensional structural diagram of a display cover provided in an embodiment of this application;

[0044] Figure 5 A schematic partial three-dimensional structural diagram of another display cover provided in an embodiment of this application;

[0045] Figure 6 A schematic partial three-dimensional structural diagram of another display cover provided in an embodiment of this application;

[0046] Figure 7 A schematic partial cross-sectional view of a display cover provided in an embodiment of this application;

[0047] Figure 8 A schematic partial cross-sectional view of another display cover provided in an embodiment of this application;

[0048] Figure 9 A schematic top view of a single recess in another display cover provided in an embodiment of this application;

[0049] Figure 10 A schematic cross-sectional view of a single groove in a display cover provided in an embodiment of this application;

[0050] Figure 11 A schematic structural diagram of a mask provided for an embodiment of this application;

[0051] Figure 12 A schematic structural diagram showing another corresponding mask and display cover provided in an embodiment of this application;

[0052] Figure 13 A schematic flowchart illustrating another method for preparing a display cover plate provided in this application embodiment;

[0053] Figure 14 This is a schematic structural diagram of a display device provided in an embodiment of this application.

[0054] The reference numerals in the figure represent:

[0055] 100, Base; 110, First side; 120, Second side; 130, Unit area; 140, Side; 141, First curved surface; 150, Bottom; 151, Second curved surface; α, Inclination angle; 200, Groove; 201, Flash point area; 210, Groove edge; 220, Protrusion; 221, Edge high point; 222, Edge low point; 224, Smooth protrusion structure; 230, First connecting line; 240, Second connecting line; 300, Mask; 301, Mask area; 310, Light-transmitting area; 320, Light-blocking area; 400, Display cover. Detailed Implementation

[0056] To better understand the technical solutions provided in the embodiments of this specification, the technical solutions of the embodiments of this specification will be described in detail below with reference to the accompanying drawings and specific embodiments. It should be understood that the embodiments of this specification and the specific features in the embodiments are detailed descriptions of the technical solutions of the embodiments of this specification, rather than limitations on the technical solutions of this specification. In the absence of conflict, the embodiments of this specification and the technical features in the embodiments can be combined with each other.

[0057] In this document, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, without necessarily requiring or implying any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element. The term "two or more" includes two or more cases.

[0058] The present application provides a display cover plate, a mask, a display module, and a display device that can reduce or avoid flash point phenomena.

[0059] For example, Figure 1 This is a schematic partial top view of a display cover provided in an embodiment of this application. (Reference) Figure 1 When etching the display cover using a conventional wet etching method, even with more uniform grains, unevenly sized pits will still form on the substrate 100. The substrate 100 can be made of glass. For example... Figure 1 The grooves 200 formed in the middle are of different sizes, and the size difference of the grooves 200 is quite large. Figure 1 When the display cover shown is matched with a high-pixel module, ambient light shining on the chips of significantly different sizes will result in noticeably different light reflection effects. The chips, i.e., the grooves 200, will undergo total internal reflection. Due to the light-focusing effect of the grooves 200, some chips will concentrate the light to the same position, thus forming flashes. Flashes are, for example... Figure 1 The white flash point area 201 is a problem that needs to be avoided in products of this field.

[0060] In some examples, to improve the flash point problem of the display cover, more uniform grains can be introduced in the wet etching process to control the grain size. However, since it is difficult to control the grain distribution during the process, although the flash point problem can be partially reduced, it is difficult to solve the flash point problem.

[0061] For example, the etching process can create multiple grooves with different orthographic projection shapes and areas, and these grooves can have different depths on a cross-section of the substrate along its thickness. Groove edges are formed between adjacent grooves. The distance between the top of some groove edges and the bottom edge of the substrate is relatively large, indicating that this groove edge is farther from the bottom edge of the substrate than other groove edges. In other words, with the bottom edge of the substrate as a reference, the extreme height of the groove edges is larger, and the height values ​​of multiple groove edges are more dispersed, making it easier for flash points to form. Simultaneously, the phenomenon of adjacent grooves being close together also makes it easier for flash points to form.

[0062] Figure 2 A schematic partial cross-sectional view of another display cover provided in an embodiment of this application. Figure 3 A schematic partial top view of another display cover provided in an embodiment of this application. In some examples, reference is made to... Figure 2 This application provides a display cover plate that can be applied to a display module. The display cover plate includes a substrate 100, which includes a first side 110 and a second side 120 opposite to each other. (Refer to...) Figure 3 The first side 110 of the substrate 100 may have multiple grooves 200, and the substrate 100 may include multiple unit regions arranged in an array, with spacing between the multiple unit regions for cutting. The unit regions may be, for example... Figure 3 As shown in the overall rectangular region, the orthographic projection area of ​​a unit region on the substrate can be designed based on the actual processing conditions. Each unit region can include multiple grooves 200, and groove edges 210 can be formed between the multiple grooves 200. The shape of the groove 200 can be clearly observed through the orthographic projection shape of the groove edge 210 on the substrate. The lowest points of the groove bottoms of the multiple grooves 200 in the unit region are scattered, that is, the multiple grooves 200 are not arranged in an array. The multiple grooves 200 can be randomly arranged, that is, irregularly arranged. The orthographic projection areas of the multiple grooves 200 can also be different, and the dimensions of the multiple grooves 200 in the thickness direction of the substrate 100 can also be different, which makes the design of the grooves 200 more flexible. In addition, the random arrangement of grooves can better improve the flash point problem.

[0063] For example, the groove can be formed by etching on the substrate. The space formed by the etched groove can be understood as the aforementioned grain. The substrate wall corresponding to the grain can be used to disperse external ambient light to avoid the phenomenon of flashing. By designing the position of the lowest point of the groove bottom to form a scattered distribution, the uneven size of the grains on the substrate is avoided due to the difficulty in controlling the orthographic projection size of the grains on the substrate and the depth of the grains in the thickness direction of the substrate during the etching process. This prevents the display cover from being matched with a high pixel density (Pixels Per Inch, PPI) display module, where external light passes through grains of different sizes and forms reflected light with large differences in reflection angle, thus causing the phenomenon of flashing.

[0064] For example, the mask required in the display cover plate fabrication process may include multiple light-shielding areas or multiple light-transmitting areas. During the fabrication of the display cover plate, the lowest point of the groove bottom may correspond to the center point of the light-shielding area of ​​the mask, or it may correspond to the center point of the light-transmitting area of ​​the mask. Depending on the type of photoresist, the mask can selectively have light-shielding or light-transmitting areas, or vice versa. For example, the photoresist may be positive photoresist, and a light-transmitting area may be set in the mask, or the photoresist may be negative photoresist, and a light-shielding area may be set in the mask.

[0065] For example, the light-blocking area of ​​the mask can be distributed in a scattered manner, or the light-transmitting area of ​​the mask can be distributed in a scattered manner.

[0066] In some examples, the grain distribution on the substrate can be controlled by setting the number, area, and arrangement of unit regions. The number of unit regions is greater than or equal to 1. Figure 3 This can be understood as one of the unit areas in this application; the other unit areas can be defined as follows: Figure 3 The unit regions shown are used as a reference and are arranged in an array on the surface of the substrate facing the second side. For example, the area of ​​the unit region is 1 mm. 2 In this case, the number of grains can range from 270 to 1,000,000.

[0067] In some examples, multiple unit regions can include the same scattered distribution design to save on the number of masks that need to be designed, reduce the computing power required to generate mask patterns, reduce the difficulty of mask production, and improve production efficiency.

[0068] For example, the scatter distribution results in different distances between the lowest points of the bottom of adjacent grooves.

[0069] In addition, the distance between the lowest points of the bottom of adjacent grooves can characterize the size of the grains. For example, the smaller the distance between the lowest points of the bottom of the grooves, the smaller the grains formed by the groove, and vice versa. That is, multiple grains of different sizes and shapes are formed by a scattered distribution, thereby weakening the flash point phenomenon through grains of different sizes and shapes.

[0070] In some examples, multiple unit regions can be arranged in an array, while the grooves within a unit region can be non-arrayed, such as the scatter distribution described above.

[0071] For example, discrete points in a scattered distribution can be obtained through algorithms such as Thiessen polygons or Poisson disk random point placement algorithms, or by manual drawing. When manual drawing is too laborious, a complete pattern can be obtained by setting unit regions and arranging them in an array.

[0072] This application improves the design freedom of grooves by setting scattered grooves on the substrate. For example, it avoids the formation of steep slopes between adjacent grooves, which can lead to large differences in the height of the display cover and increase the likelihood of flash points. Furthermore, the scattered groove distribution can prevent large height differences between groove edges due to etching limitations, where some structures between adjacent grooves are not etched, resulting in large height spans or significant differences in groove size, thus avoiding flash point phenomena. Additionally, the scattered distribution prevents adjacent grooves from connecting, meaning that the projected areas of multiple grooves on the substrate do not differ excessively. Moreover, different scattered groove distribution designs can be used for display cover plates in different usage environments.

[0073] In some examples, reference Figure 3 The groove 200 can be formed by etching. The etched groove 200 can form a groove edge 210. The orthographic projection of the groove edge on the substrate includes a straight line. The groove edge 210 can be used to determine the area of ​​each groove 200 in a top view. The orthographic projection shape of the groove edge 210 on the substrate can be determined based on the number or arrangement of the surrounding grooves 200. The lowest point of the groove bottom of the groove 200 can correspond to the center point of the mask of the photomask, that is, the center point of the light-blocking area or the center point of the light-transmitting area.

[0074] In some examples, reference Figure 3 The orthographic projection of the groove edge 210 between adjacent grooves 200 onto the substrate includes a straight line. The groove edges of adjacent grooves can each include the structure corresponding to this linear orthographic projection.

[0075] For example, a protrusion may be formed between any groove and an adjacent groove, the structure of the groove facing the first side of the substrate can be understood as the groove edge, and the protrusion may include a protrusion edge.

[0076] For example, the structure formed by the groove on the first side surface of the substrate can be understood as the protrusion mentioned above, and the distance between the different positions of the protrusion and the second side surface of the substrate can be different due to the different spacing between adjacent grooves.

[0077] Figure 4 This is a schematic partial three-dimensional structural diagram of a display cover provided for embodiments of this application. In some examples, reference is made to... Figure 4 Between adjacent grooves 200, raised areas of varying heights can be formed. For example, in the thickness direction of the substrate, the edges between adjacent grooves can have high and low points 222. Because the distance between the center points of the bottoms of adjacent grooves differs, after the same etching process, the different distances result in different etching degrees, thus forming groove edges of varying heights. The middle position of the edge between adjacent grooves 200 is more easily etched, forming a low point 222, while the endpoints of the edge are less easily etched, forming a high point. The position of the high point can be as follows... Figure 1 As shown in the diagram, the distance between the highest point of the edge and the surface of the base facing the second side is greater than the distance between the lowest point of the edge 222 and the surface of the base facing the second side. Figure 4 In the cross-section shown, the high and low points 222 of the edges are shown, but it can be understood that there are multiple protrusions throughout the substrate, rather than being limited to... Figure 4 In some structural aspects, the protrusions in actual products can be a three-dimensional structure formed by multiple adjacent grooves, and the lowest point of the protrusion can be non-linear. Figure 4 The position shown is the lowest point 222 on the edge of the groove. The protrusion height varies at different edge positions of the groove, thus the protrusion has a continuous undulating shape. For example, refer to... Figure 4 On one cross-section of the substrate along its thickness direction, the plane containing the lowest point of the bottom of one of the multiple grooves 200 can be used as the reference plane. The height difference between the highest point of the protrusion away from the second side surface of the substrate, i.e., the highest point among the multiple edge high points, and the reference plane can be 1.63 μm. Furthermore, Figure 4 This can indicate that a portion of a unit area is connected by groove 200. Figure 4 The different colors in the text indicate different groove depths of groove 200. Figure 4 The direction from bottom to top indicates that the groove 200 is from deep to shallow. For example, the groove 200 near the blue area is deeper, and the protrusions near the yellow or even red areas are higher.

[0078] For example, since the grooves are scattered, the etching time, etching depth, and other parameters of multiple grooves are different during the etching process, resulting in different depths and projected areas of the multiple grooves. Adjacent grooves can have different depths, so that the edge of the groove formed by adjacent grooves can include an edge high point and an edge low point. The dimension of the groove in the thickness direction of the substrate can transition from the edge high point to the edge low point. For example, the dimension can decrease from the dimension of the edge high point to the dimension of the edge low point, or it can continue to increase to the dimension of the edge high point.

[0079] In some examples, the substrate can be etched through multiple etching processes. Based on the first etching process, the edge high points and edge low points on the substrate are obtained. Through the second etching process, the protrusions with edge high points can be etched to reduce the distance between the side of the groove edge away from the second side surface of the substrate and the second side surface of the substrate. This makes the edge high points of the protrusions closer to the edge low points of the protrusions, thereby reducing the height difference between the protrusions on the substrate and making the height of the protrusions more uniform, thus avoiding the occurrence of flash point phenomenon.

[0080] In some examples, after the first etching process is completed, the edge high points within a certain range can be obtained, and then the selected edge high points can be processed in a second process to smooth the groove edge and reduce the overall height of the substrate protrusion, so as to avoid the difference between the edge high points and edge low points of the substrate being too large, which would cause the display cover to have flashing spots.

[0081] For example, the second processing step can be a chemical polishing process, which can remove the tip structure of the protrusion, reduce the height of the protrusion, make the tip of the protrusion smoother, and make the transition of the tilt angle between adjacent grooves smoother.

[0082] In some examples, reference Figure 4 The protrusion includes an arc-shaped tip, which can be a smooth arc or a semi-circular tip. Since the grooves 200 are scattered, the distance between the lowest points of the bottoms of adjacent grooves 200 is uncertain. After the same etching process, the arc-shaped tip can be the curved surface formed after the etching process removes the tip of the protrusion. For example... Figure 3 The etched, arc-shaped tip of the protrusion can form a curved surface. For example, the arc-shaped tip can be the side surface of the protrusion away from the second side of the substrate. Since the grooves in this application are designed with a scattered distribution, the shape of the arc-shaped tip formed between adjacent grooves or the distance between the arc-shaped tip and the second side surface can be different. In one cross-section along the substrate thickness direction, the arc-shaped tip and the second side surface of the substrate can have different distances to form an undulating protrusion. The high point of the protrusion in the cross-section can include an edge high point, and the low point of the protrusion in the cross-section can include an edge low point.

[0083] Figure 5 This is a schematic partial three-dimensional structural diagram of another display cover provided in an embodiment of this application. In some examples, reference is made to... Figure 5 The adjacent grooves 200 are formed with raised parts 220 of varying heights.

[0084] In some examples, reference Figure 5 The orthographic projection of the groove edge formed between adjacent grooves 200 may include a straight line, or the orthographic projection of the groove edge formed by the etching process of a portion of the arc-shaped tip between adjacent grooves 200 may include a straight line, even if there is no overlap between them.

[0085] In some examples, the area of ​​the unit region is greater than or equal to 1 mm. 2 On the substrate corresponding to a unit area, any groove includes an edge high point and an edge low point. The maximum distance between the edge high point and the second side surface of the substrate minus the minimum distance between the edge low point and the second side surface of the substrate is less than or equal to 2 μm, for example, the minimum distance is 2.0 μm, 1.8 μm, 1.6 μm or 1.5 μm, so as to form multiple grooves of different depths and reduce the upper limit of the groove edge in the thickness direction of the substrate.

[0086] For example, refer to Figure 5 The height difference between the highest point and the lowest point of the bottom of multiple grooves in a unit area can be less than or equal to 2 μm. For example, the height of the highest point is 2.261 μm, the height of the lowest point of the bottom is 0.761 μm, and the height difference is 1.5 μm. The lowest point of the grain can be the center of the bottom of the groove.

[0087] For example, to reduce drawing size, the grooves on the first side surface of the substrate can be arranged in an array of multiple unit areas. Meanwhile, to avoid color patterns or other problems on the display cover, the projected area of ​​each unit area must be greater than or equal to 1 mm². 2 .

[0088] In some examples, in a cross-section along the thickness direction of the substrate, the two ends of the edge formed between adjacent grooves may include edge high points, and the edge formed between adjacent grooves may include edge low points, with the edge low points located between the two ends of the edge. On the substrate corresponding to a unit area, the maximum distance between the edge high point and the second side surface of the substrate minus the minimum distance between the edge low point and the second side surface of the substrate is less than 2 μm.

[0089] Figure 6 This is a schematic partial structural diagram of another display cover provided in an embodiment of this application. In some examples, reference is made to... Figure 6Within a unit area, the difference in the lowest point of the edges of multiple grooves along the substrate thickness direction is less than or equal to 1 μm, for example, it can be 1 μm, 0.8 μm, or 0.6 μm, to limit the lower limit of the groove edges along the substrate thickness direction. This makes the dimensions of multiple grooves within a unit area more compact in the substrate direction, avoiding flash point problems caused by sudden increases or decreases in the dimensional differences of the groove edges. For example, three adjacent grooves include a first groove, a second groove, and a third groove. The line connecting the lowest point of the bottom of the first groove and the lowest point of the bottom of the second groove is a first connecting line 230, and the lowest point of the corresponding edge can be located at the intersection of the first connecting line 230 and the edge. Correspondingly, the line connecting the lowest point of the bottom of the first groove and the lowest point of the bottom of the third groove is a second connecting line 240, and the lowest point of the corresponding edge can be located at the intersection of the second connecting line 240 and the edge.

[0090] For example, refer to Figure 6 ,exist Figure 6 In the areas shown, the red, yellow, green, and blue areas represent the gradual increase in groove depth. Figure 6 Six grooves surround the first groove. Markers c, d, e, f, g, and h are the intersection points of the lines connecting the protrusions of the first groove to the corresponding groove centers. Marker f can be the lowest point of the edge formed by the first and third grooves, and marker d can be the lowest point of the edge formed by the first and second grooves. Since the marks have both lowest and highest points, for example, marker d has the highest height, with a distance of 1.631 μm from the second side surface of the substrate. Therefore, marker d can be temporarily considered the lowest point of the second groove. The lowest point of the second groove's edge can be re-determined after subsequent measurements. Marker f has the lowest height, with a distance of 0.663 μm from the second side surface of the substrate. Marker f can be considered the lowest point of the edge of either the first or third groove. The height difference between markers d and f is 0.968 μm, which is less than 1 μm, satisfying the condition that the height difference of the edges of the same groove is less than 1 μm.

[0091] For example, within a unit area of ​​the substrate, the plane containing the lowest point among multiple protrusions can be used as a reference plane. The distance between the multiple edge low points of the protrusions and the reference plane is less than or equal to 1 μm to avoid excessive undulation of the protrusions, which could lead to flash point phenomena. For instance, the lowest edge point of any groove can be determined by considering the edge low points of each edge. By comparing the difference between this lowest edge point and the lowest edge points of the other grooves with 1 μm, it can be determined whether the above condition is met. Alternatively, data on the edge low points of all grooves in the unit area can be obtained to determine the lowest and highest edge points among all groove edges. Using the lowest edge point as a reference and 1 μm as a reference range, edges that do not meet the condition can be identified. These non-compliant edges can then be re-etched to meet the condition.

[0092] It should be noted that the lowest point of the groove edge is the lowest point of the groove edge in the direction of the base thickness, not the bottom of the groove.

[0093] Figure 7 This is a schematic partial cross-sectional view of a display cover provided for an embodiment of this application. In some examples, reference is made to... Figure 7 A cross-sectional view of a single groove 200 can be U-shaped. For example, the grain walls can have different heights to form edge high points 221 and edge low points (not shown, the cutting line does not pass through the edge low points). There is a clear continuity between adjacent grains, resulting in an overall wavy shape. The continuous wavy boundaries are burr-free, the bottom heights of the grains vary, and the sidewall morphologies differ; for example, the inclination angles of the sidewalls of different grains are different, which is more conducive to the diffuse reflection of external light by the grains, thereby reducing or avoiding flash point phenomena.

[0094] For example, Figure 7 The distance between the edge high point 221 and the second side surface of the substrate can be 1.551 μm, and the distance between the edge high point 221 and the lowest point of the groove bottom can be 1.488 μm.

[0095] Figure 8 A schematic partial cross-sectional view of another display cover provided in an embodiment of this application. In some examples, reference is made to... Figure 8 The protrusion includes a smooth protrusion structure 224, and adjacent grooves 200 are connected by the smooth protrusion structure 224. Some of the protrusions undergo a second or multiple etching processes to make the sidewalls between adjacent grooves 200 smooth, so as to form continuous grains.

[0096] In some examples, smooth protrusion structures can be fabricated based on an etching process.

[0097] Figure 9A schematic top view of a single recess in another display cover provided in this application embodiment. Figure 10 This is a schematic cross-sectional view of a single recess in a display cover provided for an embodiment of this application. In some examples, reference is made to... Figure 10 The base corresponding to the groove 200 includes a side portion 140 and a bottom portion 150. The side portion 140 is connected between the protrusion and the bottom portion 150, or between the smooth protrusion structure and the bottom portion 150, or the protrusion and the smooth protrusion structure can surround the side portion 140, and the side portion 140 surrounds the bottom portion 150.

[0098] For example, the groove can be formed by an etching process. Etching can make the sidewall of the groove form a certain slope. The substrate corresponding to the groove with different slopes has different deflection capabilities for external light. The steeper the slope, the easier it is to concentrate light and produce a flash phenomenon.

[0099] In some examples, reference Figure 10 This allows for a more intuitive demonstration that the side portion 140 and the bottom portion 150 of the groove 200 are connected. The side portion 140 may include a first curved surface 141, and the bottom portion 150 includes a second curved surface 151. In the thickness direction of the substrate, the angle between the tangent direction of the first curved surface 141 and the plane containing the substrate is greater than or equal to 2.5°.

[0100] For example, refer to Figure 10 The bottom 150 and the side 140 of the groove can be divided based on the groove's ability or effect to deflect light. For example, if the angle exceeds 2.5°, the angle between the incident light and the outgoing light will be greater than 5°, that is, the tilt angle α between the substrate corresponding to the groove 200 and the incident light will be greater than 5°, so that the substrate corresponding to the groove 200 will form haze after being irradiated by light. Therefore, the structure in the groove 200 that meets the above angle conditions and can form haze can be defined as the side 140 of the groove 200, and the rest can be defined as the bottom 150 of the groove 200.

[0101] For example, the groove can be formed by an etching process, the inner wall of the substrate corresponding to the groove can be inclined, the inclination angle of the second curved surface at the bottom can transition to the inclination angle of the first curved surface, and the groove corresponding to the bottom will not produce haze, for example, external light passes through part of the groove.

[0102] In some examples, the ratio of the projected area of ​​the bottom on the substrate to the projected area of ​​the corresponding groove on the substrate is less than or equal to 80%. For example, the ratio is 80%, 70%, or 60%.

[0103] For example, the orthographic projection area of ​​the bottom on the substrate affects the product haze of the display cover. The orthographic projection of the groove on the substrate includes the bottom orthographic projection and the side orthographic projection. The ratio of the orthographic projection area of ​​the bottom on the substrate to the orthographic projection area of ​​the groove on the substrate is less than or equal to 80%, and the ratio of the orthographic projection area of ​​the side on the substrate to the orthographic projection area of ​​the groove on the substrate is greater than or equal to 20%.

[0104] In some examples, the shape of the orthographic projection of the groove onto the substrate can include polygons, such as triangles, quadrilaterals, or pentagons.

[0105] For example, the orthographic shape of a groove depends on the number of adjacent grooves. For instance, if one groove has five adjacent grooves, the orthographic shape of the groove is pentagonal, thus forming a pentagonal grain. Furthermore, if the spacing between adjacent grooves is greater than twice the average groove spacing, the corresponding groove edge cannot be formed.

[0106] In some examples, the area of ​​the unit region is greater than or equal to 1 mm. 2 .

[0107] In some examples, the shape of the orthographic projection of the groove onto the substrate may include a circle or an ellipse.

[0108] In some examples, the shape of the orthographic projection of the groove onto the substrate can include polygons and circles.

[0109] In some examples, the grooves are scattered, with one groove serving as a reference and multiple grooves surrounding it. Because of this scattered distribution, the distances between the reference groove and the other grooves vary. Therefore, after the masking process, the orthographic projection shape of the grooves onto the substrate can include irregular polygons, with at least two adjacent irregular polygons having different shapes. This variation in groove shape makes it easier to achieve the flicker reduction effect in cover glass displays.

[0110] In some examples, the shapes of the irregular polygons within a unit area are all different. The greater the variation in the groove shape, the weaker the flashing problem of the cover plate in the display, or even the absence of flashing. In some examples, continuous grains are paired together in the top view, and the connecting edges are all straight lines. Only by completely etching the grain boundaries can the final pattern formed by the photolithography process effectively avoid optical problems such as streaks. Photolithography grains with good optical effects can include various polygons, mainly pentagons and hexagons, and are closely arranged without gaps. The orthographic projection area of ​​the grains on the substrate is 9μm. 2 Up to 15000μm 2 Between these two points, the maximum projected area of ​​the same product should be no more than 5 times the minimum area.

[0111] In some examples, the spacing between the centers of the orthographic projection of multiple grooves on the substrate is greater than or equal to 3μm and less than or equal to 60μm, such as 3μm, 20μm or 60μm. This can avoid the effect of excessively large or small spacing on the etching effect of the grooves, which would prevent the edge high point and edge low point parameters of the protrusion from failing to meet the corresponding conditions, resulting in the occurrence of flash point phenomenon in the display cover.

[0112] In some examples, Figure 11 This is a schematic structural diagram of a mask provided for an embodiment of this application. (Reference) Figure 11 This application provides a mask for fabricating the display cover plate in any of the above-described technical solutions. The mask area in the mask 300 for forming the pattern can be as follows: Figure 11 The example scatter distribution design, Figure 11 In the mask 300 shown, the closed pattern can be represented as the mask area 301. The substrate is masked by the mask area 301, and the corresponding pattern can be formed after exposure and development.

[0113] For example, a photomask can be used to show the process of forming grooves in the photolithography process of the cover plate.

[0114] Figure 12 This is a schematic structural diagram showing another corresponding mask and display cover provided in an embodiment of this application. Figure 12 The left image (a) illustrates the exposure and development of the substrate using a mask. Figure 12 The right image (b) represents the substrate after exposure and development. Figure 12 The left and right images are arranged in a corresponding configuration to better illustrate the relationship between the photomask and the display cover after exposure and development. In some examples, refer to... Figure 12 The mask 300 includes multiple light-transmitting areas 310 or multiple light-blocking areas 320. The light-transmitting areas 310 within a unit area are distributed in a scattered manner, and the light-blocking areas 320 within a unit area are also distributed in a scattered manner.

[0115] For example, photoresists can be divided into positive photoresists and negative photoresists, and the etching acid in the photolithography process can include hydrofluoric acid. Based on the type of photoresist, the grooves can be scattered and distributed using both the light-transmitting and light-shielding areas, for example... Figure 12 The light-transmitting areas in the photoresist are scattered and exposed for development, or... Figure 12 The light-transmitting area is replaced with a light-blocking area to expose and develop the negative photoresist.

[0116] In some examples, for positive photoresist, the shape of the light-transmitting area includes polygons, circles, or a combination of polygons and circles. In some examples, for negative photoresist, the shape of the light-blocking area includes polygons, circles, or a combination of polygons and circles.

[0117] In some examples, the light-transmitting areas within a unit area are scattered.

[0118] In some examples, the shaded areas within a unit area are scattered.

[0119] For example, the light-transmitting area can be formed into a groove of a corresponding shape, that is, the orthographic projection shape of the groove on the display cover onto the substrate can include one or more of polygons, circles, and ellipses.

[0120] In some examples, the mask drawing setup can be non-arrayed and the entire surface can be arranged with controlled, unordered dots.

[0121] In some examples, the mask includes multiple repeating mask units, each comprising multiple light-blocking areas or multiple light-transmitting areas. The mask units can be used to form grooves within a unit area of ​​the display cover. The area of ​​each mask unit is greater than or equal to 1 mm². 2 .

[0122] For example, using a full-area mask drawing would result in an excessively large drawing size. By arranging the mask elements in an array, the drawing size can be reduced. Furthermore, to prevent color fringing caused by an excessively small drawing size, the area of ​​the smallest array element, i.e., the mask element, needs to be greater than 1 mm². 2 .

[0123] In some examples, the area of ​​the light-transmitting or light-blocking region ranges from 0.785 μm. 2 Up to 314μm 2 The inner diameter of the light-blocking or light-transmitting area can range from 1 μm to 20 μm.

[0124] For example, the light-transmitting area and the light-shielding area can be used to form grooves on the substrate in different embodiments. The size of the light-shielding area or the light-transmitting area can determine the adjustable range of the haze of the display cover, but there are certain requirements for the photolithography process. For example, the area range of the orthographic projection of the groove formed by the light-transmitting area or the light-shielding area on the corresponding substrate can be from 1 μm to 20 μm.

[0125] In some examples, the spacing between adjacent light-transmitting areas or adjacent light-blocking areas is greater than or equal to 3 μm and less than or equal to 60 μm.

[0126] For example, the spacing between adjacent light-transmitting or light-blocking areas determines the size of the final grain formed by etching. When the etched grain is large, the clarity of the display cover combined with the display module is poor. When the size of the etched grain is reduced, the clarity of the display cover combined with the module is improved.

[0127] In addition, by using multiple grooves formed by the light-transmitting area or the light-blocking area, the distance between the lowest point of the bottom of the multiple grooves is greater than or equal to 3μm and less than or equal to 60μm, for example, 3μm, 20μm or 60μm. This can avoid the effect of excessively large or small distances affecting the etching effect, so that the parameters of the edge high point and edge low point of the protrusion cannot meet the corresponding conditions, resulting in the occurrence of flash point phenomenon of the display cover.

[0128] In some examples, the mask includes multiple repeating mask units, each comprising multiple light-blocking areas or multiple light-transmitting areas. The mask units can be used to form grooves within a unit area of ​​the display cover. The area of ​​each mask unit is greater than or equal to 1 mm². 2 The area of ​​the light-transmitting or light-blocking region ranges from 0.785 μm. 22 Up to 314μm 2 The inner diameter of the light-blocking or light-transmitting area can range from 1 μm to 20 μm.

[0129] In some examples, the mask includes multiple repeating mask units, each comprising multiple light-blocking areas or multiple light-transmitting areas. The mask units can be used to form grooves within a unit area of ​​the display cover. The area of ​​each mask unit is greater than or equal to 1 mm². 2 The distance between adjacent light-transmitting areas or adjacent light-blocking areas is greater than or equal to 3μm and less than or equal to 60μm.

[0130] For example, the chip size of the display cover needs to match the pixel design of the display module. For instance, for Organic Light-Emitting Diode (OLED) products, smaller chips can provide better clarity, while for Liquid Crystal Display (LCD) screens, larger chips can be used. The display cover of this application is paired with a high-resolution display module. The chip size of this application can be controlled within the range of 3μm to 60μm. This range can include endpoint values, i.e., the distance between adjacent light-transmitting or light-blocking areas of the mask is greater than or equal to 3μm and less than or equal to 60μm.

[0131] In some examples, the mask includes multiple repeating mask units, each comprising multiple light-blocking areas or multiple light-transmitting areas. The mask units can be used to form grooves within a unit area of ​​the display cover. The area of ​​each mask unit is greater than or equal to 1 mm². 2 The area of ​​the light-transmitting or light-blocking region ranges from 0.785 μm. 2 Up to 314μm 2The inner diameter of the light-blocking or light-transmitting area can range from 1 μm to 20 μm, and the distance between adjacent light-transmitting or light-blocking areas is greater than or equal to 3 μm and less than or equal to 60 μm.

[0132] In some examples, the mask forms multiple grooves, and the orthographic projection of the groove edges between adjacent grooves onto the substrate comprises a straight line.

[0133] In some examples, raised sections of varying heights are formed between adjacent grooves.

[0134] In some examples, the recess formed by the mask includes a bottom and a side, with the side connecting between a smooth raised structure and the bottom or between a raised portion and the bottom, the raised portion or smooth raised structure possibly surrounding the side, and the side surrounding the bottom.

[0135] In some examples, each area in the mask can correspond to the grain center of the cover plate, that is, the center point of the bottom of the groove, and the etched groove can form a polygonal pattern, for example.

[0136] In some examples, the grain center remains unchanged after etching, and the edge of the groove is affected by the distance between adjacent grooves. For example, if the distance between adjacent grooves is large, the pattern formed after etching will be large. If the distance between adjacent grooves is more uniform, the grain size formed after etching will be more uniform.

[0137] In some examples, the shape of the protrusion depends on the number of adjacent grooves; for example, if there are 5 adjacent grooves, a pentagonal grain will be formed. It is important to note that if the spacing between adjacent grooves is greater than twice the average spacing, corresponding edges cannot be formed.

[0138] Figure 13 This is a schematic flowchart illustrating another method for preparing a display cover plate according to an embodiment of this application. In some examples, reference is made to... Figure 13 This application can be prepared using a photolithography process. Through photolithography, a pre-defined pattern can be formed on the glass surface. The patterned protective layer allows for precise control of the etching solution during etching. For example, hydrofluoric acid (HF acid) enters from a pre-defined location, first etching the area without a protective layer. After a height difference is formed, the bottom and sides of the grooves are simultaneously etched. Once the sides are etched to a certain extent, the upper protective film layer will peel off, ultimately forming continuous grain pits. The dimensions of the grain pits in the substrate thickness direction can then be collected. Locations that do not meet the groove edge height requirements are marked, and then chemical polishing is used to etch or remove these locations to reduce the edge height and form continuous, smooth grains. The aforementioned protective layer is photoresist, and patterning is the exposure and development process.

[0139] In some examples, this application provides a display module, including a display panel and a display cover plate as described in any of the above technical solutions, wherein the display cover plate is disposed on the display side of the display panel.

[0140] In some examples, Figure 14 This is a schematic structural diagram of a display device provided in an embodiment of this application. (Reference) Figure 14 This application provides a display device, including the display module in any of the above technical solutions, wherein the display module may include a display cover plate 400.

[0141] The display devices provided in this application embodiment may include televisions, computers, smartphones, smart wearable devices, laptops, and tablets, etc. Smart wearable devices may include smartwatches, AR (augmented reality) devices, and VR (virtual reality) devices, etc.

[0142] It should be noted that the descriptions of each embodiment in the above embodiments have different focuses. For parts that are not described in detail in a certain embodiment, please refer to the relevant descriptions in other embodiments.

[0143] The above embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this application.

[0144] Although preferred embodiments have been described in this specification, those skilled in the art, upon learning the basic inventive concept, can make other changes and modifications to these embodiments. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments as well as all changes and modifications falling within the scope of this specification.

[0145] Obviously, those skilled in the art can make various modifications and variations to this specification without departing from its spirit and scope. Therefore, if such modifications and variations fall within the scope of the claims and their equivalents, this specification is also intended to include such modifications and variations.

Claims

1. A display cover, characterized in that, Applied to a display module, the display cover plate includes: a substrate, the substrate including opposing first and second sides; The substrate comprises multiple unit regions arranged in an array; The first side is provided with multiple grooves, and the lowest points of the groove bottoms in the unit area are distributed in a scattered manner.

2. The display cover plate according to claim 1, characterized in that, The orthographic projection of the groove edge between adjacent grooves onto the substrate comprises a straight line; and / or, The adjacent grooves are formed with raised sections of varying heights.

3. The display cover plate according to claim 2, characterized in that, The base corresponding to the groove includes a side portion and a bottom portion, the side portion is connected between the protrusion and the bottom portion, the protrusion surrounds the side portion, and the side portion surrounds the bottom portion; The side portion includes a first curved surface, and the bottom portion includes a second curved surface; In a plane perpendicular to the base, the angle between the tangent direction of the first surface and the plane containing the base is greater than or equal to 2.5°.

4. The display cover plate according to claim 3, characterized in that, The ratio of the orthographic projection area of ​​the bottom on the substrate to the orthographic projection area of ​​the corresponding groove on the substrate is less than or equal to 80%.

5. The display cover plate according to claim 2, characterized in that, The edges between adjacent grooves include high points at both ends, and the edges between adjacent grooves include low points, with the low points located between the two ends of the edges; On the substrate corresponding to the unit region, the maximum distance between the high point of the edge and the second side surface of the substrate minus the minimum distance between the low point of the edge and the second side surface of the substrate is less than or equal to 2 μm; and / or In the unit region, the difference between the lowest points of the edges of the plurality of grooves in the direction of the substrate thickness is less than or equal to 1 μm; And / or, The highest point of the edge has an arc-shaped tip.

6. The display cover plate according to claim 2, characterized in that, The protrusion includes a smooth protrusion structure, and adjacent grooves are connected through the smooth protrusion structure.

7. The display cover plate according to claim 6, characterized in that, The smooth protrusion structure is prepared based on an etching process.

8. The display cover plate according to claim 1, characterized in that, The area of ​​the unit region is greater than or equal to 1 mm. 2 .

9. The display cover plate according to claim 1, characterized in that, The shape of the orthographic projection of the groove onto the substrate includes a polygon.

10. The display cover plate according to claim 9, characterized in that, The polygons include irregular polygons; At least two adjacent irregular polygons have different shapes, and / or, all irregular polygons within the unit region have different shapes.

11. A photomask, characterized in that, Used to prepare a display cover plate as described in any one of claims 1 to 10.

12. The mask according to claim 11, characterized in that, The mask includes multiple light-transmitting areas, and the light-transmitting areas within the unit area are distributed in a scattered manner. The center point of the orthographic projection of the light-transmitting area on the mask is used to correspond to the lowest point of the groove bottom. or, The mask includes multiple light-blocking areas, which are scattered within the unit area. The center point of the orthographic projection of the light-blocking area on the mask corresponds to the lowest point of the groove bottom.

13. The photomask according to claim 12, characterized in that, The shape of the light-transmitting area includes polygons and / or circles; or, The shape of the light-shielding area includes polygons and / or circles.

14. The mask according to claim 11, characterized in that, The mask comprises multiple repeating mask units, each mask unit including multiple light-blocking areas or multiple light-transmitting areas, and the area of ​​each mask unit is greater than or equal to 1 mm². 2 The mask unit is used to correspond to the grooves within a unit area of ​​the display panel; and / or The area of ​​the light-transmitting region or the light-blocking region is 0.785 μm. 2 Up to 314μm 2 ; and / or The distance between adjacent light-transmitting areas or adjacent light-blocking areas is greater than or equal to 3 μm and less than or equal to 60 μm.

15. A display module, characterized in that, include: Display panel; The display cover plate as described in any one of claims 1-10, wherein the display cover plate is disposed on the display side of the display panel.

16. A display device, characterized in that, include: The display module as described in claim 15.

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