Patent Description:
With the rapid development of display technologies, such as OLED display technologies, OLED display screens are widely applied to mobile terminal products such as mobile phones and personal digital assistants (PDA) as display screens. During use of a mobile phone screen, when a human hand touches a display screen to hold a mobile phone, an outer surface of a transparent cover plate of the display screen is relatively likely to accumulate a large quantity of charges. The charges enter the display screen through the transparent cover plate and the middle frame, and cause a feature shift in a display driving part, which affects a driving affect, thereby generating a green screen phenomenon and affecting the use and life of the mobile phone.

How to design a solution to block impact of charges generated by contact between a hand and the transparent cover plate of the display screen on driving of the display screen is a trend of research and development in the industry.

<CIT> relates to a light-emitting module and a display device. The light-emitting module includes: a body including a light-emitting panel and a cover plate located on a light emission side of the light-emitting panel; and a conductive layer arranged on a side of the body, the conductive layer having a part which is continuous from the cover plate to the light-emitting panel, wherein the conductive layer is grounded.

<CIT> relates to a substrate with an electrostatic shielding structure, a panel with an electrostatic shielding structure and manufacturing methods of the substrate and the panel. The substrate includes an insulating base, a first wiring layer arranged on the insulating base, a first insulating layer arranged on the first wiring layer, a second wiring layer arranged on the first insulating layer, a second insulating layer arranged on the second wiring layer, and a top wiring layer arranged on the second insulating layer; a trench in the first insulating layer is filled with a first electrostatic shielding part which is formed by wires at the outmost side of the second wiring layer and is located at the periphery of the substrate; a trench in the second insulating layer is filled with a second electrostatic shielding part which is formed by wires at the outmost side of the top wiring layer; and the first electrostatic shielding part and the second electrostatic shielding part are connected with each other so as to form the electrostatic shielding structure.

This application provides a mobile terminal, to avoid display impact of charges generated by contact between a hand and a transparent cover plate of a display screen on driving of the display screen.

A display screen assembly is provided, and applied to a mobile terminal. The display screen assembly includes a transparent cover plate and a display module. The transparent cover plate includes a transparent region and a light-shielding region located at a side edge of the transparent region. The transparent region includes a first inner surface, and the light-shielding region includes a second inner surface connected to the first inner surface. The display module is stacked on the first inner surface of the transparent region.

A charge blocking layer is arranged on at least a part of the second inner surface of the light-shielding region, and the charge blocking layer extends along side edges of the display module to block charges generated outside the mobile terminal from entering the display module. Holding two sides of the mobile terminal by a human hand during use generates charges outside the transparent cover plate. Such charges are transmitted to the inside of the display screen assembly through a middle frame, which affects driving performance of the display module. The charge blocking layer on the display screen assembly can absorb and eliminate external negative charges, to prevent the external charges from entering the display module to affect driving display of the display module, thereby preventing a green screen phenomenon of the display screen.

A material of the charge blocking layer includes an adhesive mixed with an electropositive hole material. The charge blocking layer is electrically positive, corresponding to the negative charges outside the display screen assembly, and can absorb and eliminate negative charges.

In an embodiment, the charge blocking layer includes a base layer disposed in the light-shielding region and a plurality of holes disposed at intervals on the base layer. The base layer is electrically positive. After the negative charges outside the display screen assembly diffuse to the light-shielding region, the plurality of holes absorb the negative charges into the inside of the plurality of holes, to prevent the negative charges from further diffusing into a display region, and the negative charges adsorbed into the holes can be neutralized and eliminated due to an electropositive hole characteristic of the base layer. The plurality of holes may be blind holes, or may be through-holes passing through the base layer. Arrangement manners of the plurality of holes are not limited.

In an embodiment, the charge blocking layer includes a plurality of protrusion structures arranged at intervals on the second inner surface of the light-shielding region. The protrusion structure has electrically positive holes, and lacks electrons, and a surface of the plurality of protrusion structures forms an adsorption surface with a large enough area to achieve a blocking effect. Negative charges enter the charge blocking layer including the plurality of protrusion structures, and the surface of the protrusion structures achieves adsorption and neutralization of charges, to limit further transfer of negative charges.

In an embodiment, the second surface of the light-shielding region is covered with an intermediate layer, the charge blocking layer is formed on a side, facing away from the second surface, of the intermediate layer, and the intermediate layer is configured to fix the charge blocking layer on the second surface. Adhesive strength between the intermediate layer and the light-shielding region is greater than adhesive strength between the charge blocking layer and the light-shielding region, which can ensure stability of the charge blocking layer in the light-shielding region.

In an embodiment, a distance between every two adjacent holes of the plurality of holes in the charge blocking layer is greater than or equal to <NUM>. The charge blocking layer includes a plurality of protrusion structures, and a distance between every two of the protrusion structures is greater than or equal to <NUM>. The distance can ensure a blocking effect of the charge blocking layer.

In an embodiment, a thickness of the charge blocking layer is greater than or equal to <NUM> micrometer. The charge blocking layer can cover an entire ink region, thereby achieving adsorption and neutralization of a large quantity of external charges. The charge blocking layer covers a surface of ink, and therefore does not affect light-shielding performance of the ink. In addition, the <NUM>-micrometer thickness of the charge blocking layer does not affect an adhesive layer between the middle frame and the display screen assembly. Certainly, the thickness of the charge blocking layer can be increased on the premise of ensuring adhesiveness of the adhesive layer between the middle frame and the display screen assembly.

In an embodiment, the electropositive hole material is one or more of a perovskite positive material, an aniline-based hole material, a metal chelate composite material, or a styrene-based material. In an embodiment, the charge blocking layer is formed through a combination of one or more of a nanoimprinting process, a photomask process, or a coating and imprinting process.

In an embodiment, the light-shielding region is formed by coating an edge of the transparent cover plate with light-shielding ink, and the light-shielding region is located in a non-display region of the display screen assembly. On the premise that space of the display screen assembly is limited, the charge blocking layer is disposed on the surface of the ink region (light-shielding region), which does not affect light-shielding performance of the ink, and does not occupy additional space of the display screen assembly.

In an embodiment, the second inner surface includes a first region and a second region connected to the first region, the second region extends along a length direction of the first region, the second region is located on a side, away from the first inner surface, of the second inner surface, and the charge blocking layer is stacked on the first region and/or the second region. A position of the charge blocking layer can be appropriately set based on a position and space of an adhesive between the display screen assembly and the middle frame, to ensure that application of the display screen assembly is not affected while ensuring a charge blocking effect.

In an embodiment, the charge blocking layer is disposed on each of the first region and the second region, and a thickness of the charge blocking layer on the first region is greater than a thickness of the charge blocking layer on the second region. The second region is further used for bonding with the middle frame of the mobile phone. The thickness of the blocking layer in the second region is less than the thickness of the charge blocking layer in the first region, and there is enough space to accommodate the adhesive without affecting assembly stability of the middle frame and the display module.

In an embodiment, an edge of the transparent cover plate is provided with a first assembling edge, the light-shielding region includes an extension region on a side away from the transparent region, the extension region covers the first assembling edge, and the charge blocking layer is stacked on the extension region.

This application provides a mobile terminal, including the described display screen assembly and a middle frame. The display screen assembly is mounted on the middle frame, and the transparent cover plate is fixed to the middle frame through bonding, to further effectively block transfer of charges.

In an embodiment, the middle frame includes a second assembling edge and a third assembling edge connected to the second assembling edge. An edge of the transparent cover plate is provided with a first assembling edge. The light-shielding region includes an extension region on a side away from the transparent region, and the extension region covers the first assembling edge. The first assembling edge and the second assembling edge are interconnected and bonded by using an adhesive layer, and the third assembling edge and a part of the light-shielding region are interconnected and bonded by using the adhesive layer. Charges generated when a human hand holds two sides of the mobile terminal cannot enter the inside of the display screen assembly due to blocking by the charge blocking layer, to ensure normal driving and display of the display module, thereby ensuring practical performance of the mobile terminal.

In an embodiment, the adhesive layer is doped with an electropositive hole material. The electropositive hole material is doped on the premise of not affecting bonding performance of the adhesive layer. The adhesive layer located between the first assembling edge and the second assembling edge can absorb and block external charges when they are transferred along the edge of the transparent cover plate, to assist the charge blocking layer located between the third assembling edge and a part of the light-shielding region in jointly blocking external charges from entering.

In an embodiment, the second inner surface includes a first region and a second region connected to the first region, the second region extends along a length direction of the first region, the second region is located on a side, away from the transparent region, of the second inner surface, the third assembling edge and the second region of the light-shielding region are interconnected, and the charge blocking layer is stacked on the first region and/or the second region.

The third assembling edge and the second region of the light-shielding region are interconnected, and the adhesive layer bonds the charge blocking layer on the second region and a surface of the third assembling edge. The first region is configured to separate the second region from the display module. In addition, the first region does not need to be bonded to the middle frame, and the charge blocking layer with a larger thickness can be disposed, to improve an adsorption and blocking effect.

In an embodiment, the charge blocking layer is disposed on each of the first region and the second region, and a thickness of the charge blocking layer on the first region is greater than a thickness of the charge blocking layer on the second region. The adhesive layer bonds the second region of the light-shielding region and a surface of the first assembling edge. The thickness of the charge blocking layer on the second region is relatively small, and there is enough space to accommodate the adhesive layer, which can ensure sealing performance of a bonding position between the middle frame and the display screen assembly while ensuring assembly flatness of the display screen assembly and the middle frame.

In an embodiment, the charge blocking layer is stacked on the extension region, the first assembling edge and the second assembling edge are interconnected, and the adhesive layer bonds the charge blocking layer on the extension region and the second assembling edge, to further ensure an effect of blocking external charges.

According to the display screen assembly described in this application, the charge blocking layer is disposed on the light-shielding region, to absorb and eliminate charges externally generated when a hand holds the mobile terminal to which the display screen assembly is applied, and prevent the charges from entering the display screen assembly through the middle frame and the transparent cover plate of the mobile terminal to affect driving display of the display module, thereby preventing a green screen phenomenon of the display screen.

To describe the technical solutions in the embodiments of this application or the background more clearly, the following describes the accompanying drawings required for use in the embodiments of this application or the background.

This application provides a display screen assembly for display on a mobile terminal, and the mobile terminal may be a mobile device with a display screen, such as a mobile phone and a tablet. The display screen assembly includes a transparent cover plate and a display module. The transparent cover plate includes a transparent region and a light-shielding region located at a side edge of the transparent region. The transparent region includes a first inner surface, and the light-shielding region includes a second inner surface connected to the first inner surface. The display module is stacked on the first inner surface of the transparent region. A charge blocking layer is arranged on at least a part of the second inner surface of the light-shielding region, and the charge blocking layer extends along side edges of the display module to block charges generated outside the mobile terminal from entering the display module. Specifically, negative charges generated outside the transparent cover plate because, for example, a human hand holds two sides of the mobile terminal are transferred to the inside of the display screen assembly. The charge blocking layer on the display screen assembly can absorb and eliminate external negative charges, to prevent the external charges from entering the display module to affect driving display of the display module, thereby preventing a green screen phenomenon for display of the display screen assembly. The display screen assembly in this application is described in detail by using a display screen of a mobile phone as an example.

Refer to <FIG> is a schematic cross-sectional view of a display screen assembly according to an embodiment of this application. A structure of a part of the display screen assembly is shown in the figure. In this embodiment, the display screen assembly <NUM> includes a transparent cover plate <NUM> and a display module <NUM>. The transparent cover plate <NUM> is connected to the display module to protect the display module <NUM>. It should be noted that section lines thereof do not represent specific structures, but are intended to distinguish between components at positions more intuitively. The display module is a multi-layer structure, and only an overall structural cross section is shown in <FIG>. An overall structural cross section is also shown for the charge blocking layer, and overall structural cross sections are shown for cross-sectional views of all subsequent assemblies.

Refer to <FIG> as well. <FIG> is a schematic cross-sectional view of a part of a structure of the display module <NUM> shown in <FIG>. In this implementation, the transparent cover plate <NUM> is transparent glass, and is configured to encapsulate the display module <NUM>. When the display screen assembly <NUM> is used in a mobile phone, the transparent cover plate <NUM> is located at an outermost side of the front of the mobile phone, and the transparent cover plate <NUM> is configured to be transparent to displayed pictures, and is touchable. The transparent cover plate <NUM> may be glass, resin, plastic, or the like, and for example, a glass cover plate is used. Two short sides of the transparent cover plate <NUM> correspond to two ends of the display screen assembly, and two long sides correspond to two sides of the display screen. The display module <NUM> is configured to display images and emitting display light. The display module <NUM> in this embodiment is an organic light-emitting diode OLED (Organic Light-Emitting Diode) display, and certainly, may alternatively be a liquid crystal display. The display module <NUM> includes a polarized layer <NUM>, a display layer <NUM>, and a buffer layer <NUM> that are stacked. The polarized layer <NUM> may be a polarizer, and the buffer layer <NUM> may be formed by laminating a copper sheet and foam. The display module <NUM> is disposed on one side of the transparent cover plate <NUM>, and they are connected by an optical adhesive layer <NUM>. The optical adhesive layer <NUM> may be an OCA (Optically Clear Adhesive) optical adhesive layer. An OCA optical adhesive has characteristics of being colorless and transparent, light transmittance of at least <NUM>%, and high bonding strength, and the like.

In this embodiment, the transparent cover plate <NUM> includes a transparent region <NUM> and a light-shielding region <NUM> located at a side edge of the transparent region <NUM>. In this embodiment, the light-shielding region <NUM> is located at two opposite sides of the transparent region <NUM>, and can completely prevent light leakage from the transparent region <NUM>. Two sides of the transparent cover plate include arc-shaped regions, and the arc-shaped regions are also a part of the transparent region. In other embodiments, the light-shielding region <NUM> may be disposed at a periphery of the transparent region <NUM>, the transparent region <NUM> includes a first inner surface, and the light-shielding region <NUM> includes a second inner surface <NUM> connected to the first inner surface <NUM>. The first inner surface <NUM> and the second inner surface <NUM> can be understood as surfaces on an inner side of the transparent cover plate <NUM>, and an outer side of the transparent cover plate <NUM> is a side on which the display module <NUM> displays pictures. In this embodiment, in order that the light-shielding region <NUM> completely shields light of the display module <NUM> in the transparent region <NUM> to prevent the light of the display module <NUM> from penetrating the transparent cover plate <NUM> through the light-shielding region <NUM>, the second inner surface <NUM> is an entire surface of the light-shielding region <NUM>, and extends along side edges of the display module <NUM>. The display module <NUM> is stacked on the first inner surface <NUM> of the transparent region <NUM>. The transparent region <NUM> is a display region when the display screen assembly <NUM> is used in a mobile phone, and is configured to be transparent to display of the display module <NUM>. The light-shielding region <NUM> is located in a non-display region of the display screen assembly <NUM>. Actually, the non-display region in this embodiment is located on a side edge, which can be understood as a side frame of the display screen assembly. The light-shielding region <NUM> is formed by coating a region, located at an edge of the display region, of the transparent cover plate <NUM> with an ink layer <NUM>, and can be understood as an ink region, which is configured to prevent light leakage from the display module. The second inner surface <NUM> is specifically an inner surface of the ink layer <NUM>. In other embodiments, an arc-shaped edge region of the transparent cover plate may be a light-shielding region.

The charge blocking layer <NUM> is arranged on the second inner surface <NUM> of the light-shielding region <NUM>. The charge blocking layer <NUM> is arranged on a surface of the ink region. Therefore, light-shielding performance of the ink is not affected, and a micrometer-level thickness of the charge blocking layer <NUM> does not affect adhesive-layer connection (dispensing by using adhesive caulk) used for assembly of the display screen assembly and the middle frame. Refer to <FIG>. The second inner surface <NUM> includes a first region <NUM> and a second region <NUM> connected to the first region <NUM>, the second region <NUM> extends along a length direction of the first region <NUM>, and the second region <NUM> is located on a side, away from the first inner surface <NUM>, of the second inner surface <NUM>. In an implementation of this embodiment, the charge blocking layer <NUM> is disposed on each of the first region <NUM> and the second region <NUM>. In other words, the entire second inner surface <NUM> is covered with the charge blocking layer <NUM>. The charge blocking layer <NUM> in this embodiment performs adsorption and blocking when external charges enter the edge of the transparent cover plate <NUM>, to further effectively block transfer of charges. The charge blocking layer <NUM> is disposed on the first region <NUM>. A direction from the first assembling edge to the second region <NUM> and further to the first region <NUM> is a direction in which external charges enter the inside of the display module <NUM>.

In this embodiment, the charge blocking layer <NUM> completely covers the second inner surface <NUM>, and the charge blocking layer <NUM> is located on two sides of the display module <NUM> and extends along the side edges of the display module <NUM>. A position of the charge blocking layer <NUM> is used to completely prevent external charges from entering the display module <NUM>. The charge blocking layer <NUM> has electrically positive holes, which interact with negative charges outside the transparent cover plate <NUM>, and can adsorb and eliminate the negative charges generated outside the mobile phone, to block charges generated outside the mobile phone from entering the display module <NUM> through the middle frame and prevent driving of the display module from being affected, thereby preventing a green screen phenomenon of the display screen on the mobile phone. The blocking described in this application includes adsorption and elimination.

Refer to <FIG>. In another implementation, the charge blocking layer <NUM> is disposed on the first region <NUM> to cover the entire first region <NUM>, and the charge blocking layer <NUM> extends along the two sides of the display module <NUM> to completely isolate the two sides of the display module <NUM> from the second region <NUM>, so as to prevent external charges from entering the display module <NUM>.

In this embodiment, a thickness of the charge blocking layer <NUM> on the first region <NUM> is greater than a thickness of the charge blocking layer <NUM> on the second region <NUM>. The second region <NUM> is further used for bonding with the middle frame of the mobile phone. The thickness of the blocking layer in the second region <NUM> is less than the thickness of the charge blocking layer <NUM> in the first region <NUM>, and there is enough space to accommodate the adhesive without affecting assembly stability of the middle frame and the display module. The thickness of the charge blocking layer <NUM> on the first region <NUM> is <NUM>. Actually, the display module <NUM> and the second region <NUM> are spaced apart by the first region <NUM>, and the first region <NUM> has a large thickness and also a large area, which can enhance a blocking and adsorption effect.

Refer to <FIG>. In another implementation, the charge blocking layer <NUM> is disposed on the second region <NUM>. The first region <NUM> isolates the charge blocking layer <NUM> on the second region from the display module <NUM>, which is convenient for processing.

Refer to <FIG>. In another implementation, an edge of the transparent cover plate <NUM> is provided with a first assembling edge <NUM>, the light-shielding region <NUM> includes an extension region <NUM> on a side away from the transparent region <NUM>, and the extension region <NUM> covers the first assembling edge <NUM>. The second inner surface in this implementation includes a surface on a position of the extension region. The extension region is also the ink region. In any one of the foregoing implementations, the charge blocking layer is stacked on the extension region <NUM>. In order to clearly distinguish a position of the charge blocking layer, the charge blocking layer on the extension region <NUM> is denoted as 30A, which has a same structure and material as the charge blocking layer, and can be understood as extending of the charge blocking layer <NUM> to the extension region <NUM>. The first assembling edge <NUM> is configured to connect to the middle frame of the mobile phone, and is connected and fixed by using the adhesive layer. The charge blocking layer is stacked on the extension region <NUM> to enhance an effect of blocking external charges.

In an embodiment of this application, a material of the charge blocking layer <NUM> includes an adhesive mixed with an electropositive hole material. The electropositive hole material is one or more of a perovskite positive material, an aniline-based hole material, a metal chelate composite material, or a styrene-based material. The electropositive hole material is mixed with an adhesive and then formed on the second inner surface <NUM> of the light-shielding region <NUM>.

Refer to <FIG>. Based on the foregoing embodiment, in an embodiment of this application, the charge blocking layer <NUM> includes a base layer <NUM> stacked on the light-shielding region <NUM> and a plurality of holes <NUM> disposed at intervals on the base layer <NUM>. The plurality of holes <NUM> may be blind holes, or may be through-holes passing through the base layer <NUM>. Arrangement manners of the plurality of holes <NUM> are not limited, provided that processing of the holes <NUM> and charge blocking performance are not affected. For example, the plurality of holes <NUM> are evenly distributed on the base layer <NUM>, or in a direction from the light-shielding region <NUM> to the transparent region <NUM>, namely, in a direction in which the external charges enter, the plurality of holes <NUM> are arranged from sparse to dense. Alternatively, the plurality of holes are arranged in an array, and the holes in every two adjacent rows are staggered. That is, a hole in the first row is opposite to a position between two adjacent holes in the second row. Certainly, there may be another arrangement. Specifically, the plurality of holes <NUM> are evenly arranged on the base layer <NUM>, and a thickness of the base layer <NUM> is greater than or equal to <NUM>. In this embodiment, the thickness of the base layer <NUM> is <NUM>. The hole <NUM> is a through-hole and penetrates through two opposite side surfaces of the base layer <NUM>, and the opposite two side surfaces of the base layer <NUM> are a side surface in contact with the second inner surface <NUM> and the other side surface facing away from the side surface. The base layer <NUM> is electrically positive. After the negative charges outside the display screen assembly <NUM> diffuse to the light-shielding region <NUM>, the plurality of holes <NUM> absorb the negative charges into the inside of the plurality of holes <NUM>, to prevent the negative charges from further diffusing into the display region, and the negative charges adsorbed into the holes <NUM> can be neutralized and eliminated due to an electropositive hole characteristic of the base layer <NUM>. The charge blocking layer <NUM> is formed through a combination of one or more of a nanoimprinting process, a photomask process, or a coating and imprinting process. In this embodiment, the charge blocking layer <NUM> is formed by using nanoimprinting and cured by using UV light or the like. The base layer <NUM> forming the charge blocking layer <NUM> is formed by using a hole material, and the material of the base layer <NUM> lacks electrons. Moreover, due to a total surface of the plurality of holes <NUM> and a blocking function, negative charges enter the holes <NUM> to achieve adsorption and neutralization, which limits further transfer of the negative charges. For a flexible display screen, a plurality of holes <NUM> are formed in a non-planar light-shielding region <NUM> other than the transparent region <NUM> of the transparent cover plate <NUM>, and are easier to manufacture and implement by using a nanoimprinting technology.

In an embodiment of this application, a distance between every two adjacent holes <NUM> of the plurality of holes <NUM> in the charge blocking layer is greater than or equal to <NUM>. The distance is selected according to an actual requirement, to ensure that external charges can be absorbed and blocked. This can be understood as follows: There is a corresponding change trend relationship between density of the holes <NUM> of the charge blocking layer <NUM> and a quantity of charges that are generated outside the mobile terminal and that enter the display screen assembly <NUM>. For example, during a testing process of the display screen assembly <NUM>, a range of a quantity of charges generated during use of the display screen assembly <NUM> can be determined, and the density of the holes <NUM> and/or a size of the hole <NUM> can be set based on the determined range of the quantity of charges to ensure that external charges can be completely blocked from entering the inside of the display module. This can be simply understood as follows: A larger quantity of charges determined during testing indicates larger density for correspondingly disposing the holes <NUM>, so as to effectively protect the display screen of the mobile phone during operation.

In another embodiment of this application, the charge blocking layer <NUM> includes a plurality of protrusion structures arranged at intervals on a surface of the light-shielding region <NUM>. The protrusion structure may be a structure such as a column or a bar-shaped protrusion structure.

Refer to <FIG>. In an implementation of this embodiment, the protrusion structure is a column <NUM> protruding from the second inner surface, and the column may be a cylinder, a prism, or the like The cylinder is used in this embodiment. Arrangement manners of the plurality of columns are not limited. The column <NUM> is electrically positive. After the negative charges outside the display screen assembly <NUM> diffuse to the light-shielding region <NUM>, the plurality of columns <NUM> block the negative charges from diffusing, and the negative charges are absorbed into an outer circumferential surface of the columns <NUM>, to prevent the negative charges from further diffusing into the display region, and further to neutralize and eliminate the absorbed negative charges. The charge blocking layer <NUM> is formed through a combination of one or more of a nanoimprinting process, transfer printing, a photomask process, or a coating and imprinting process. In this embodiment, the charge blocking layer <NUM> is formed by using nanoimprinting and cured by UV light or the like. The column <NUM> lacks electrons, and a surface of the plurality of columns <NUM> forms an adsorption surface with a large enough area to achieve a blocking effect. Negative charges enter the charge blocking layer <NUM> including the plurality of columns <NUM>, and the surface of the columns <NUM> achieves adsorption and neutralization of charges, to limit further transfer of negative charges. For a flexible display screen, a plurality of columns <NUM> with relatively small volumes are formed in the non-planar light-shielding region <NUM> other than the transparent region <NUM> of the transparent cover plate <NUM>, and are easier to manufacture and implement by using a nanoimprinting technology. In another implementation of this embodiment, as shown in <FIG>, the charge blocking layer <NUM> includes a plurality of bar-shaped protrusions <NUM> arranged at intervals on the second surface <NUM> of the light-shielding region <NUM>. Specifically, arrangement manners of the plurality of bar-shaped protrusions <NUM> are not limited, and they are evenly distributed on the base layer <NUM>. The plurality of bar-shaped protrusions <NUM> are evenly arranged, to ensure an effect of absorbing negative charges by the charge blocking layer <NUM>. The bar-shaped protrusion <NUM> is electrically positive. After the negative charges outside the display screen assembly <NUM> diffuse to the light-shielding region <NUM>, the plurality of bar-shaped protrusions <NUM> block the negative charges from diffusing, and the negative charges are absorbed into an outer surface, to prevent the negative charges from further diffusing into the display region, and further to neutralize and eliminate the absorbed negative charges. The charge blocking layer <NUM> is formed through a combination of one or more of a nanoimprinting process, transfer printing, a photomask process, or a coating and imprinting process. In this embodiment, the protrusion is formed by using nanoimprinting and cured by UV light or the like. Actually, the charge blocking layer <NUM> may include the holes <NUM>, grooves, or protrusion structures. A cross-sectional shape of the hole <NUM> is not limited, and a cross-sectional shape of the protrusion is not limited, provided that they can absorb charges and block the charges outside the display screen from entering the display module through the light-shielding region <NUM>. In an embodiment, a distance between every two of the protrusions is greater than or equal to <NUM>. The distance is selected according to an actual requirement, to ensure that external charges can be absorbed and blocked. This can be understood as follows: There is a corresponding change trend relationship between density of the columns or bar-shaped protrusions of the charge blocking layer <NUM> and a quantity of charges that are outside the mobile terminal and that enter the display screen assembly <NUM>. For example, during a testing process of the display screen assembly <NUM>, a range of a quantity of charges generated during use of the display screen assembly <NUM> can be determined, and the density of the columns or bar-shaped protrusions can be set based on the determined range of the quantity of charges to ensure that external charges can be completely blocked from entering the inside of the display module. This can be simply understood as follows: A larger quantity of charges determined during testing indicates larger density for correspondingly disposing the columns or bar-shaped protrusions, so as to effectively protect the display screen of the mobile phone during operation.

In an embodiment, the second surface <NUM> of the light-shielding region <NUM> is covered with an intermediate layer (not shown in the figure), the charge blocking layer <NUM> is formed on a side, facing away from the second surface <NUM>, of the intermediate layer, and the intermediate layer is configured to fix the charge blocking layer <NUM> on the second surface <NUM>. For selection of a material of the intermediate layer, the material has relatively high adhesion with both the ink layer of the light-shielding region <NUM> and the charge blocking layer <NUM>, to ensure that the charge blocking layer <NUM> can be securely formed in the light-shielding region <NUM> and a phenomenon of falling off is prevented, thereby ensuring a charge blocking effect.

Refer to <FIG>. This application provides a mobile terminal. A mobile phone is used as an example in a specific embodiment. The mobile phone <NUM> includes the described display screen assembly <NUM> and a middle frame <NUM>. The display screen assembly <NUM> is mounted on the middle frame <NUM>, and the transparent cover plate <NUM> is fixed to the middle frame <NUM> through bonding. Specifically, the middle frame <NUM> includes a middle board <NUM> and side frames <NUM> located on two sides of the middle board <NUM>. The middle board is configured to support and carry other structures such as batteries and circuit boards of the mobile phone, and the side frame is configured to fix and seal external structures such as the display screen assembly and a rear cover. The side frame <NUM> includes a second assembling edge <NUM> and a third assembling edge <NUM> connected to the second assembling edge <NUM>. The first assembling edge <NUM> and the second assembling edge <NUM> are interconnected and bonded by an adhesive layer <NUM>. The third assembling edge <NUM> and a part of the light-shielding region <NUM> are interconnected and bonded by the adhesive layer <NUM>, so that the display module and the middle frame <NUM> are fixedly connected. The mobile terminal uses the display screen assembly <NUM> described in this application. During use, negative charges generated outside the transparent cover plate <NUM> enter the light-shielding region of the display screen assembly <NUM> through the middle frame <NUM>. The charge blocking layer disposed in the light-shielding region can absorb and eliminate charges, to achieve a blocking effect and ensure normal display of the mobile terminal, thereby improving quality of the mobile terminal.

Refer to <FIG> as well. In this embodiment, the charge blocking layer <NUM> of the display screen assembly <NUM> is stacked on the first region <NUM> and the second region <NUM>, that is, disposed on the entire light-shielding region <NUM>, and an extension region <NUM> is located outside the charge blocking layer <NUM>. The third assembling edge <NUM> and the second region <NUM> of the light-shielding region <NUM> are interconnected, and the adhesive layer <NUM> bonds the charge blocking layer <NUM> on the second region <NUM> and a surface of the third assembling edge <NUM>.

As shown in <FIG>, in an embodiment, the charge blocking layer <NUM> is disposed on each of the first region <NUM> and the second region <NUM>, and a thickness of the charge blocking layer <NUM> on the first region <NUM> is greater than a thickness of the charge blocking layer <NUM> on the second region <NUM>. The adhesive layer <NUM> bonds the second region <NUM> of the light-shielding region <NUM> and a surface of the first assembling edge. The thickness of the charge blocking layer <NUM> on the second region <NUM> is relatively small, and there is enough space to accommodate the adhesive layer <NUM>, which can ensure sealing performance of a bonding position between the middle frame <NUM> and the display screen assembly <NUM> while ensuring assembly flatness of the display screen assembly <NUM> and the middle frame <NUM>. In addition, the display module <NUM> and the second region <NUM> are spaced apart by the first region <NUM>. Actually, when dispensing is performed for the adhesive layer <NUM> between the first assembling edge <NUM> and the second assembling edge <NUM>, an adhesive in a liquid state can be prevented from flowing into the display module of the display screen through the second region <NUM>, thereby ensuring performance of the display module <NUM>.

In an embodiment, the adhesive layer <NUM> is doped with an electropositive hole material. The electropositive hole material is doped on the premise of not affecting bonding performance of the adhesive layer <NUM>. The adhesive layer <NUM> located between the first assembling edge <NUM> and the second assembling edge <NUM> can absorb and block external charges when they are transferred along an edge of the transparent cover plate <NUM>, to assist the charge blocking layer <NUM> located between the third assembling edge <NUM> and a part of the light-shielding region <NUM> in jointly blocking external charges from entering. The adhesive layer <NUM> located between the third assembling edge <NUM> and a part of the light-shielding region <NUM> may also be doped with an electropositive hole material.

Refer to <FIG>. In an embodiment, based on any one of the foregoing embodiments, the charge blocking layer 30A is stacked on the extension region <NUM>, the first assembling edge <NUM> and the second assembling edge <NUM> are interconnected, and the adhesive layer <NUM> bonds the charge blocking layer 30A on the extension region <NUM> and the second assembling edge <NUM>.

Claim 1:
A display screen assembly (<NUM>), applied to a mobile terminal, wherein the display screen assembly (<NUM>) comprises a transparent cover plate (<NUM>) and a display module (<NUM>);
the transparent cover plate (<NUM>) comprises a transparent region (<NUM>) and a light-shielding region (<NUM>) located at a side edge of the transparent region (<NUM>), the transparent region (<NUM>) comprises a first inner surface (<NUM>), the light-shielding region (<NUM>) comprises a second inner surface (<NUM>) connected to the first inner surface (<NUM>), and the display module (<NUM>) is stacked on the first inner surface (<NUM>) of the transparent region (<NUM>); and
a charge blocking layer (<NUM>) is arranged on at least a part of the second inner surface (<NUM>) of the light-shielding region (<NUM>), and the charge blocking layer (<NUM>) extends along side edges of the display module (<NUM>) to block charges generated outside the mobile terminal from entering the display module (<NUM>), characterized in that a material of the charge blocking layer (<NUM>) comprises an adhesive mixed with an electropositive hole material.