CN108040142A - Cover plate, manufacturing method of cover plate, display module and mobile terminal - Google Patents

Abstract

The invention relates to a cover plate, a manufacturing method of the cover plate, a display module and a mobile terminal. The cover plate comprises a substrate and an ink layer. The substrate is transparent; the printing ink layer comprises a first printing ink layer and a second printing ink layer, the first printing ink layer is arranged on one side of the substrate, the first printing ink layer defines a window area, and the window area is matched with a display area of the display screen; the second ink layer is arranged on one side of the first ink layer, which is far away from the substrate, and the lightness of the second ink layer is smaller than that of the first ink layer; the second ink layer is positioned on the periphery of the window area, and the inner edge of the second ink layer is flush with the inner edge of the first ink layer; when the cover plate is covered on the display screen, the orthographic projection of the second ink layer on the display screen shields the non-display area of the display screen. Above-mentioned apron, when the display screen was lighted, the non-display area was sheltered from by the second printing ink layer, and the black limit in the window region just becomes invisible, therefore can beautify the display effect of display screen.

Description

Cover plate, manufacturing method of cover plate, display module and mobile terminal

technical field

The present application relates to the technical field of mobile terminals, in particular to a cover, a method for manufacturing the cover, a display module and a mobile terminal.

Background technique

The display screen of a mobile terminal (mobile phone, tablet, etc.) generally includes a display area and a non-display area. When the display screen is on, the non-display area is black, and the display screen has black borders, which have an adverse effect on the appearance of the mobile terminal.

Contents of the invention

Embodiments of the present application provide a cover plate, a manufacturing method of the cover plate, a display module and a mobile terminal, so as to solve the problem that the black border of the display screen adversely affects the appearance of the mobile terminal.

A cover plate is used to cover the display screen, the cover plate includes:

the substrate is transparent; and

The ink layer includes a first ink layer and a second ink layer, the first ink layer is arranged on one side of the substrate, the first ink layer defines a window area, and the window area is connected to the display screen Display area adaptation;

The second ink layer is arranged on the side of the first ink layer away from the substrate, and the lightness of the second ink layer is smaller than the lightness of the first ink layer; the second ink layer is located on the the outer periphery of the viewing window area, and the inner edge of the second ink layer is flush with the inner edge of the first ink layer; when the cover plate is placed on the display screen, the second ink layer is The orthographic projection on the display screen blocks the non-display area of the display screen.

A display module includes a display screen and the above-mentioned cover plate, and the cover plate is arranged on the display screen.

A method for manufacturing a cover, comprising the following steps:

Provide a transparent substrate;

printing a first ink layer on one side of the substrate;

printing a second ink layer on a side of the first ink layer away from the substrate, the lightness of the second ink layer being less than the lightness of the first ink layer; and

The first ink layer and the second ink layer are subjected to material removal treatment by using a laser radium engraving process, so that the inner edge of the first ink layer is flush with the inner edge of the second ink layer; The first ink layer defines a window area adapted to the display area of the display screen.

A display module, comprising a display screen and a cover plate manufactured by the above-mentioned manufacturing method of the cover plate, the cover plate is covered on the display screen, and the second ink layer is on the display screen The orthographic projection of occludes the non-display area.

A mobile terminal includes a rear case and the above-mentioned display module, the display screen is at least partially accommodated in the rear case, and the cover plate is fixedly connected to the rear case.

In the cover plate, the manufacturing method of the cover plate, the display module, and the mobile terminal, one side of the substrate of the cover plate is provided with a first ink layer and a second ink layer with different lightness, and the inner edge of the second ink layer is the same as the first ink layer. The inner edges of the layers are flush, and the window area of the first ink layer fits into the display area of the display screen. When the display screen is lit, the non-display area is blocked by the second ink layer, and the black border in the window area becomes invisible, thereby beautifying the display effect of the display screen. Since the inner edge of the second ink layer is flush with the inner edge of the first ink layer, bright edges can be prevented from appearing on the inner edge of the ink layer. Because the lightness of the second ink layer is smaller than that of the first ink layer, which is a parameter used to characterize the brightness of the color, when the first ink layer is located on the side of the substrate close to the display screen, what the user sees is the first The color of the ink layer, that is, the light appearance; when the first ink layer is on the side of the cover away from the display screen, what the user sees is the color of the second ink layer, that is, the dark appearance. Using the first ink layer and the second ink layer with different lightness can prevent the bright light of the display screen from passing through the ink layer, so that the cover plate has a better light-shielding effect.

Description of drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings that need to be used in the description of the embodiments or the prior art. Obviously, the accompanying drawings in the following description are only These are some embodiments of the present application. Those skilled in the art can also obtain other drawings based on these drawings without creative work.

FIG. 1 is a perspective view of a mobile terminal in an embodiment;

FIG. 2 is a front view of the mobile terminal shown in FIG. 1;

Fig. 3 is a sectional view along A-A in an embodiment of the mobile terminal shown in Fig. 2;

Fig. 4 is a sectional view of a display module in an embodiment of the mobile terminal shown in Fig. 3;

5 is a sectional view of a display module in another embodiment of the mobile terminal shown in FIG. 3;

Fig. 6 is a sectional view along A-A in another embodiment of the mobile terminal shown in Fig. 2;

FIG. 7 is a cross-sectional view of the display module of the mobile terminal shown in FIG. 6;

Fig. 8 is a sectional view of the display module along A-A in another embodiment of the mobile terminal shown in Fig. 2;

FIG. 9 is a flowchart of a manufacturing method of a cover plate in an embodiment.

Detailed ways

In order to facilitate the understanding of the present invention, the present invention will be described more fully below with reference to the associated drawings. Preferred embodiments of the invention are shown in the accompanying drawings. However, the present invention can be embodied in many different forms and is not limited to the embodiments described herein. On the contrary, these embodiments are provided to make the understanding of the disclosure of the present invention more thorough and comprehensive.

It should be noted that when an element is referred to as being “fixed” to another element, it can be directly on the other element or there can also be an intervening element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "left," "right," and similar expressions are used herein for purposes of illustration only.

Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the technical field of the invention. The terms used herein in the description of the present invention are for the purpose of describing specific embodiments only, and are not intended to limit the present invention. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.

Referring to FIG. 1 and FIG. 2 , in one embodiment, the mobile terminal 10 is a mobile phone, the mobile terminal 10 includes a display module 100 and a rear case 200 , and the display module 100 is fixedly connected to the rear case 200 . Referring to FIG. 3 and FIG. 4 at the same time, in one embodiment, the display module 100 includes a cover plate 110 and a display screen 120 , the cover plate 110 covers the display screen 120 , and the display screen 120 is at least partially housed in the rear case 200 , And the cover plate 110 is fixedly connected with the rear case 200 . In one embodiment, the display screen 120 includes a display area 121 and a non-display area 123 (BM area, Black Matrix). The display area 121 can be used to display information and provide an interactive interface for the user. In one embodiment, the display screen 120 adopts an LCD (Liquid Crystal Display, liquid crystal display) screen for displaying information, and the LCD screen can be a TFT (Thin Film Transistor, thin film transistor) screen or an IPS (In-Plane Switching, plane switching) Screen or SLCD (Splice Liquid Crystal Display, special splicing liquid crystal display) screen. In other implementation manners, the mobile terminal 10 may also be a tablet or the like.

In one embodiment, the cover plate 110 includes a substrate 111 and an ink layer 113 . The substrate 111 is transparent, and the shape of the substrate 111 is roughly rectangular. The material of the substrate 111 can be glass or sapphire, and the substrate 111 has good light transmission performance. The ink layer 113 includes a first ink layer 1131 and a second ink layer 1133, the first ink layer 1131 is arranged on one side of the substrate 111, the first ink layer 1131 defines the window area 300, the window area 300 and the display area of the display screen 120 121 adaptations. It can be understood that the fit between the window area 300 and the display area 121 means that the orthographic projection of the window area 300 on the display screen 120 coincides with the display area 121 . It can be understood that the existence of machining errors should be taken into account in the coincidence. For example, when the ratio of the distance between the front projection of the edge of the window area 300 on the display screen 120 and the edge of the display area 121 to the width of the display area 121 is less than 1%, it can be considered that the front view of the window area 300 on the display screen 120 The projection coincides with the display area 121 . When the display screen 120 is turned on, the display area 121 displays information, the light of the display area 121 passes through the window area 300 of the substrate 111 , and the user can view the displayed information from the window area 300 . The second ink layer 1133 is disposed on the side of the first ink layer 1131 away from the substrate 111 , and the lightness of the second ink layer 1133 is smaller than that of the first ink layer 1131 . Brightness is a parameter used to characterize the brightness of a color, for example, the brightness of white is 100%, and the brightness of black is 0%. The second ink layer 1133 is located on the periphery of the window area 300 , and the inner edge of the second ink layer 1133 is flush with the inner edge of the first ink layer 1131 . When the cover plate 110 is placed on the display screen 120 , the orthographic projection of the second ink layer 1133 on the display screen 120 blocks the non-display area 123 of the display screen 120 .

In one embodiment, the first ink layer 1131 is a light color ink, and the second ink layer 1133 is a dark color ink. The thickness of the first ink layer 1131 is greater than or equal to the thickness of the second ink layer 1133 , this setting can make the contrast between the lightness of the first ink layer 1131 and the lightness of the second ink layer 1133 more obvious. Further, in one embodiment, the first ink layer 1131 is a white ink layer, and its lightness is 100%. The second ink layer 1133 is a black ink layer with a lightness of 0%. The second ink layer 1133 can also be a gray ink layer, which can play a better light-shielding effect. In the embodiment where the first ink layer 1131 is a white ink layer and the second ink layer 1133 is a black ink layer, the thickness of the first ink layer 1131 is greater than or equal to the thickness of the second ink layer 1133, so that the first ink layer 1131 The white of the white ink appears whiter, so as to prevent the color of the first ink layer 1131 from being dark due to the light-transmitting property of the white ink.

In one embodiment, the rear case 200 is made of a metal material such as aluminum alloy. The rear case 200 includes a body 210 and a flange 220 integrally formed on the body 210 . The flange 220 is disposed on the outer periphery of the cover 110 to form a half-enclosed structure for the cover 110 , and the cover 110 is fixedly connected to the body 210 . Specifically, in the embodiment shown in FIG. 3 , a dispensing layer 400 is provided between the second ink layer 1133 and the body 210 , the dispensing layer 400 is an adhesive material, and the cover plate 110 and the rear case 200 are fixed by the dispensing layer 400 connect. The fixed connection by means of dispensing is not only beneficial to the fixed connection between the cover plate 110 and the rear case 200 , but also beneficial to reducing the width of the frame of the rear case 200 . Further, in one embodiment, the body 210 has an abutting surface 211, the dispensing layer 400 is located on the abutting surface 211, the dispensing layer 400 is located between the ink layer 113 and the abutting surface 211 of the main body 210, the cover plate 110 and The maximum height of the abutting surface 211 is greater than the maximum height of the flange 220 and the abutting surface 211 . Referring to FIG. 3 , the maximum height between the cover plate 110 and the abutting surface 211 is H, and the maximum height between the flange 220 and the abutting surface 211 is h, and H>h. With the above structure, the flange 220 of the rear case 200 can well protect the cover plate 110 , and the mobile terminal 10 can obtain a better appearance. In other implementation manners, the rear case 200 may also be made of materials such as ceramics, glass or plastic.

Referring to Fig. 4, in one embodiment, the orthographic projection of the inner edge of the second ink layer 1133 on the display screen 120 can be located in the display area 121, that is, when the first ink layer 1131 is printed, the window area of the cover plate 110 can be made The area of 300 is smaller than that of the display area 121 of the display screen 120 , and the distance between the inner edge of the second ink layer 1133 and the edge of the display area 121 may be less than 0.15 mm. Through the above settings, it can prevent the non-display area 123 of the display screen 120 from being exposed from the window area 300 due to the installation misalignment of the cover plate 110 and the display screen 120, so that the non-display area 123 of the display screen 120 can be effectively hidden to beautify the display screen. The display effect of group 100. Further, referring to FIG. 5 , in one embodiment, the inner edge of the second ink layer 1133 can be flush with the edge of the display area 121 , that is, the window area 300 of the cover plate 110 can be aligned with the display area 121 of the display screen 120 . Since the lightness of the second ink layer 1133 is greater than that of the first ink layer 1131, the inner edge of the second ink layer 1133 is aligned with the edge of the display area 121. When the display screen 120 is lit, the second ink layer 1133 can prevent the display screen from The bright light of 120 passes through the first ink layer 1131 with low lightness, thus preventing the edge of the display area 121 from producing bright edges.

In one embodiment, when the substrate 111 is covered on the display screen 120 , the first ink layer 1131 is located between the display screen 120 and the substrate 111 , that is, the ink layer 113 is disposed on a side of the substrate 111 facing the display screen 120 . Since the ink layer 113 is disposed between the display screen 120 and the substrate 111 , the substrate 111 can protect the ink layer 113 , thus preventing the ink layer 113 from being accidentally scratched and causing the ink layer 113 to fall off. In one embodiment, the substrate 111 is flat glass, and the processing cost of the flat glass is low, and the flat substrate 111 facilitates the processing of the ink layer 113 . Referring to FIG. 6 and FIG. 7 , in another embodiment, the substrate 111 may be curved glass, such as 2.5D glass or 3D glass. By arranging the ink layer 113 on the side of the curved glass facing the display screen 120 , the black border around the display screen 120 can be effectively blocked, and the mobile terminal 10 can obtain a better appearance.

The above-mentioned cover plate 110, display module 100 and mobile terminal 10, one side of the substrate 111 of the cover plate 110 is provided with a first ink layer 1131 and a second ink layer 1133 with different lightness, the inner edge of the second ink layer 1133 and the second ink layer The inner edge of the first ink layer 1131 is flush, and the window area 300 of the first ink layer 1131 is adapted to the display area 121 of the display screen 120 . When the display screen 120 is on, the non-display area 123 is blocked by the second ink layer 1133 , and the black borders in the window area 300 become invisible, thereby beautifying the display effect of the display screen 120 . Since the inner edge of the second ink layer 1133 is flush with the inner edge of the first ink layer 1131 , bright edges can be prevented from appearing on the inner edge of the ink layer 113 . Since the brightness of the second ink layer 1133 is smaller than that of the first ink layer 1131, which is a parameter used to characterize the brightness of a color, when the first ink layer 1131 is located on the side of the substrate 111 close to the display screen 120, the user see What the user sees is the color of the first ink layer 1131, that is, a light-colored appearance; when the first ink layer 1131 is located on the side of the cover plate 110 away from the display screen 120, what the user sees is the color of the second ink layer 1133, that is, Dark look. Using the first ink layer 1131 and the second ink layer 1133 with different lightness can prevent the bright light of the display screen 120 from passing through the ink layer 113 , so that the ink layer 113 has a better light-shielding effect.

Referring to FIG. 8 at the same time, in an embodiment, the number of the first ink layer 1131 can be multiple layers, and multiple layers of the first ink layer 1131 are stacked on the same side of the substrate 111 . Specifically, in an embodiment, the first ink layer 1131 may include two or three white ink layers, and the three white ink layers are sequentially stacked on the same side of the substrate 111 . It can be understood that the number of layers of the first ink layer 1131 may also be more than four layers. The first ink layer 1131 is obtained by multi-layer printing, which is beneficial to improve the brightness of the first ink layer 1131 . For example, when the first ink layer 1131 is a white ink layer, compared with a single white ink layer, the white ink layer printed by multi-layer printing can make the first ink layer 1131 look whiter.

Referring to FIG. 9 , a method for manufacturing a cover plate 110 is also provided. The cover plate 110 is used to cover the display screen 120 of the mobile terminal 10 . The manufacturing method of the cover plate 110 includes the following steps.

S100, providing a transparent substrate 111 .

Specifically, the material of the substrate 111 may be glass or sapphire, and the glass may be tempered glass, so as to improve the drop resistance and scratch resistance of the substrate 111 . The substrate 111 can be flat glass or curved glass. The curved glass can be 2.5D glass or 3D glass, and the curved glass cover is set on the display screen 120 , and the substrate 111 is fixedly connected to the rear case 200 of the mobile terminal 10 by dispensing glue. When curved glass is used, the reflection and refraction properties of the edge of the curved glass can be used to make the mobile terminal 10 present the effect of a narrow frame.

S200 , cleaning and drying the substrate 111 .

Specifically, cleaning and drying the substrate 111 may include the following steps.

S210 , cleaning the substrate 111 .

The substrate 111 can be cleaned by ultrasonic cleaning, so that the surface of the substrate 111 can be cleaned, prevent the first ink layer 1131 from being polluted by foreign matter, and facilitate the first ink layer 1131 to adhere to the substrate 111 .

S220, drying the substrate 111.

After the substrate 111 is cleaned, a dryer can be used to dry the substrate 111 to keep the surface of the substrate 111 dry, so as to facilitate the first ink layer 1131 to adhere to the surface of the substrate 111 .

S300 , printing the first ink layer 1131 on one side of the substrate 111 .

After the substrate 111 is pre-processed and shaped, the substrate 111 has a lower surface for being attached to the display screen 120 and an upper surface away from the display screen 120 . In one embodiment, the first ink layer 1131 may be disposed on the lower surface of the substrate 111 , that is, when the substrate 111 is covered on the display screen 120 , the first ink layer 1131 is located between the display screen 120 and the substrate 111 . In another embodiment, the first ink layer 1131 can also be disposed on the upper surface of the substrate 111, that is, when the substrate 111 is covered on the display screen 120, the first ink layer 1131 is located on the side of the substrate 111 away from the display screen 120. side. In the embodiment where the first ink layer 1131 is disposed on the lower surface of the substrate 111 , the substrate 111 can protect the first ink layer 1131 to prevent the first ink layer 1131 from being scratched and falling off from the substrate 111 . In the embodiment where the first ink layer 1131 is disposed on the lower surface of the substrate 111 , the first ink layer 1131 is a light-colored ink layer, such as a white ink layer, and the appearance color of the white ink layer can be directly observed by the user.

Further, the step of printing the first ink layer 1131 on one side of the substrate 111 may also include the following steps.

S310, printing multiple layers of first ink layers 1131 layer by layer on the same side of the substrate 111, where multiple layers of first ink layers 1131 are stacked.

Specifically, in one embodiment, the first ink layer 1131 may include two or three white ink layers, and the white ink layers are stacked on the same side of the substrate 111 . The white ink layer can be printed layer by layer on the substrate 111 in a printing manner, and the layered printing method is beneficial to control the thickness of the first ink layer 1131 . It can be understood that the number of layers of the first ink layer 1131 may also be more than four layers. The first ink layer 1131 is obtained by multi-layer printing, which is beneficial to improve the brightness of the first ink layer 1131 . For example, when the first ink layer 1131 is a white ink layer, compared with a single white ink layer, the white ink layer printed by multi-layer printing can make the first ink layer 1131 look whiter.

It can be understood that the first ink layer 1131 may have an inner edge, that is, the peripheral edge of the substrate 111 is printed with the first ink layer 1131 , and the first ink layer 1131 may not be printed near the central area of the substrate 111 . In the embodiment where the number of layers of the first ink layer 1131 is multi-layered and has an inner edge, the inner edge of the single-layer ink layer away from the substrate 111 retracts toward the edge of the substrate 111, so that two adjacent single-layer ink layers are in the form of The layers are stacked in steps, and the width of the single ink layer away from the substrate 111 is smaller than the width of the single ink layer close to the substrate 111 . This printing method can prevent the inner edge of the single-layer ink layer printed later from exceeding the inner edge of the single-layer ink layer printed earlier, thereby preventing the unprinted first ink layer 1131 area of the substrate 111 from being polluted, and saving subsequent processing operations.

S500 , printing the second ink layer 1133 on the side of the first ink layer 1131 away from the substrate 111 , the lightness of the second ink layer 1133 is smaller than the lightness of the first ink layer 1131 .

Specifically, in one embodiment, the second ink layer 1133 is a dark ink layer, for example, the second ink layer 1133 may be a black ink layer or a gray ink layer. The lightness of the second ink layer 1133 is smaller than that of the first ink layer 1131 , so that the light transmission effect of the first ink layer 1131 can be weakened, so that the lightness of the first ink layer 1131 is more intense. In the embodiment where the first ink layer 1131 is a white ink layer and the second ink layer 1133 is a black ink layer, the black ink layer 113 can serve as a primer to make the white ink layer appear whiter, thereby beautifying the cover plate 110 appearance. It can be understood that the number of the second ink layer 1133 can also be multiple layers. After the second ink layer 1133 is laminated with the first ink layer 1131, it is stepped, and the width of the second ink layer 1133 is smaller than the width of the first ink layer 1131, thereby preventing the inner edge of the second ink layer 1133 from exceeding the first ink The inner edge of the layer 1131 adversely affects the appearance color of the first ink layer 1131 .

S700, using a laser engraving process to remove material from the first ink layer 1131 and the second ink layer 1133, so that the inner edge of the first ink layer 1131 is flush with the inner edge of the second ink layer 1133. The first ink layer 1131 defines the window area 300 , and the window area 300 is adapted to the display area 121 of the display screen 120 .

Specifically, after the first ink layer 1131 and the second ink layer 1133 are printed, the second ink layer 1133 can completely block the non-display area 123 of the display screen 120, that is, the orthographic projection of the second ink layer 1133 on the display screen 120 can be The non-display area 123 of the display screen 120 is completely blocked. After the first ink layer 1131 and the second ink layer 1133 are printed, the inner edges of the first ink layer 1131 and the second ink layer 1133 are processed by laser engraving, so that the inner edges of the first ink layer 1131 flush with the inner edge of the second ink layer 1133 . After the material is removed, the first ink layer 1131 defines a window area 300 on the substrate 111 , and the size of the window area 300 is adapted to the display area 121 of the display screen 120 . The laser radium engraving process has the advantages of no grinding, non-contact, and no thermal effect. When using laser radium engraving to remove material from the inner edges of the first ink layer 1131 and the second ink layer 1133, the laser will not damage the substrate 111. surface, so the excess ink layer 113 can be effectively removed, and the substrate 111 can be well protected. In addition, the laser engraving process also has the advantages of no pollution and high efficiency.

In one embodiment, the inner edge of the second ink layer 1133 may be located within the display area 121 of the display screen 120, that is, after the material is removed, the area of the window area 300 defined by the first ink layer 1131 is smaller than the area of the display area 121, The orthographic projection of the inner edge of the second ink layer 1133 on the display screen 120 may fall into the display area 121 , and the distance between the inner edge of the second ink layer 1133 and the edge of the display area 121 may be less than 0.15 mm. Through the above settings, it can prevent the non-display area 123 of the display screen 120 from being exposed from the window area 300 due to the installation misalignment of the cover plate 110 and the display screen 120, so that the non-display area 123 of the display screen 120 can be effectively hidden to beautify the display screen. The display effect of group 100. Further, in an embodiment, the inner edge of the second ink layer 1133 can be flush with the edge of the display area 121 , that is, the window area 300 of the cover plate 110 can be aligned with the display area 121 of the display screen 120 . Since the lightness of the second ink layer 1133 is greater than that of the first ink layer 1131, the inner edge of the second ink layer 1133 is aligned with the edge of the display area 121. When the display screen 120 is lit, the second ink layer 1133 can prevent the display screen from The bright light of 120 passes through the first ink layer 1131 with low lightness, thus preventing the edge of the display area 121 from producing bright edges.

It can be understood that after the first ink layer 1131 and the second ink layer 1133 are removed by laser engraving, the cover plate 110 can also be cleaned by ultrasonic cleaning, and the cover plate 110 can be cleaned by a dryer. 110 performs a drying operation to keep the surface of the cover plate 110 clean to facilitate subsequent processing of the cover plate 110 .

As used herein, a "mobile terminal" (or simply "terminal") includes, but is not limited to, configured to direct cable connection, and/or another data connection/network) and/or via (for example, for cellular networks, wireless local area networks (WLAN), digital television networks such as DVB-H networks, satellite networks, AM-FM broadcast transmitters , and/or a device for receiving/sending communication signals via a wireless interface of another communication terminal. Mobile terminals arranged to communicate over a wireless interface may be referred to as "wireless mobile terminals", "wireless terminals" and/or "communication terminals". Examples of mobile terminals include, but are not limited to, satellite or cellular telephones; Personal Communications Systems (PCS) terminals that may combine cellular radiotelephones with data processing, facsimile, and data communication capabilities; may include radiotelephones, pagers, Internet/Intranet access , a PDA with a web browser, organizer, calendar, and/or Global Positioning System (GPS) receiver; and a conventional laptop and/or palm-type receiver or other electronic device including a radiotelephone transceiver.

The various technical features of the above-mentioned embodiments can be combined arbitrarily. To make the description concise, all possible combinations of the various technical features in the above-mentioned embodiments are not described. However, as long as there is no contradiction in the combination of these technical features, should be considered as within the scope of this specification.

The above-mentioned embodiments only express several implementation modes of the present invention, and the descriptions thereof are relatively specific and detailed, but should not be construed as limiting the patent scope of the invention. It should be pointed out that those skilled in the art can make several modifications and improvements without departing from the concept of the present invention, and these all belong to the protection scope of the present invention. Therefore, the protection scope of the patent for the present invention should be based on the appended claims.

Claims (20)

1. A cover plate, which is used to cover the display screen, is characterized in that, the cover plate comprises: the substrate is transparent; and The ink layer includes a first ink layer and a second ink layer, the first ink layer is arranged on one side of the substrate, the first ink layer defines a window area, and the window area is connected to the display screen Display area adaptation; The second ink layer is arranged on the side of the first ink layer away from the substrate, and the lightness of the second ink layer is smaller than the lightness of the first ink layer; the second ink layer is located on the the outer periphery of the viewing window area, and the inner edge of the second ink layer is flush with the inner edge of the first ink layer; when the cover plate is placed on the display screen, the second ink layer is The orthographic projection on the display screen blocks the non-display area of the display screen. 2 . The cover plate according to claim 1 , wherein when the cover plate is placed on the display screen, the ink layer is located between the display screen and the substrate. 3 . 3. The cover plate according to claim 2, wherein the inner edge of the second ink layer is flush with the edge of the display area. 4. The cover plate according to claim 2, wherein the orthographic projection of the inner edge of the second ink layer on the display screen is located in the display area. 5. The cover plate according to claim 4, wherein the distance between the inner edge of the second ink layer and the edge of the display area is less than 0.15 mm. 6 . The cover plate according to claim 1 , wherein the number of the first ink layer is multiple layers, and multiple layers of the first ink layer are stacked on the same side of the substrate. 7. The cover plate according to claim 1, wherein the thickness of the first ink layer is greater than or equal to the thickness of the second ink layer. 8. The cover plate according to claim 1, wherein the first ink layer is white, and the second ink layer is black or gray. 9. The cover plate according to claim 1, wherein the substrate is made of glass or sapphire. 10. The cover plate according to claim 9, wherein the substrate is flat glass or curved glass. 11. A display module, characterized by comprising a display screen and the cover plate according to any one of claims 1 to 10, the cover plate being arranged on the display screen. 12. A mobile terminal, comprising a rear case and the display module according to claim 11, the display screen is at least partially housed in the rear case, and the cover plate is fixed to the rear case connect. 13. The mobile terminal according to claim 12, wherein the rear case comprises a body and a flange integrally formed on the body, the flange is provided on the outer periphery of the cover plate, and the The cover plate is fixedly connected with the body. 14 . The mobile terminal according to claim 13 , wherein a dispensing layer is provided between the second ink layer and the body, and the cover is fixedly connected to the rear shell through the dispensing layer. 15. The mobile terminal according to claim 14, wherein the body has an abutting surface, the dispensing layer is located on the abutting surface, and the maximum height between the cover plate and the abutting surface is greater than the maximum height between the flange and the abutment surface. 16. A method for manufacturing a cover plate, comprising the following steps: Provide a transparent substrate; printing a first ink layer on one side of the substrate; printing a second ink layer on a side of the first ink layer away from the substrate, the lightness of the second ink layer being less than the lightness of the first ink layer; and The first ink layer and the second ink layer are subjected to material removal treatment by using a laser radium engraving process, so that the inner edge of the first ink layer is flush with the inner edge of the second ink layer; The first ink layer defines a window area adapted to the display area of the display screen. 17. The manufacturing method of the cover plate according to claim 16, wherein the step of printing the first ink layer on one side of the substrate comprises: Multiple layers of the first ink layer are laminated and printed on the same side of the substrate, and the multiple layers of the first ink layer are stacked on the substrate. 18. The manufacturing method of the cover plate according to claim 16, characterized in that, before the step of printing the first ink layer on one side of the substrate, further comprising: cleaning the substrate; and Dry the substrate. 19. A display module, characterized in that it comprises a display screen and a cover plate manufactured by the method for manufacturing a cover plate according to any one of claims 16-18, the cover plate is set on the display screen , the orthographic projection of the second ink layer on the display screen blocks the non-display area. 20. A mobile terminal, comprising a rear case and the display module according to claim 19, the display screen is at least partially housed in the rear case, and the cover plate is fixed to the rear case connect.