Patent Description:
Under the current development trend of electronic devices, a higher screen-to-body ratio has gradually become the main pursuit of consumers and manufacturers. A mobile phone is used as an example. In addition to a screen, the front of the mobile phone usually needs to be equipped with devices such as a camera. To reduce space occupied by the devices such as a camera on the front of the mobile phone, so as to achieve a higher screen-to-body ratio, some manufacturers arrange the camera inside the mobile phone, and perform puncturing on the screen so that the camera can capture images of the outside world through the through hole on the screen.

During puncturing on the screen, some manufacturers remove opaque components (such as a light-emitting layer and a supporting material) between the substrate and the encapsulation layer, so as to form a through hole structure with good light permeability. However, this results in formation of a gap between the substrate and the encapsulation layer. When the substrate has specific rigidity (for example, the substrate is made of silicon oxide, silicon oxynitride, or the like), under the action of an internal and external pressure difference, the substrate and the encapsulation layer are prone to deformation, thereby affecting normal operation of the camera.

The following prior art documents numbered D1-D6 relate to further technological background of the present invention:.

Both document D1 and document D2 disclose a display screen comprising a substrate, an encapsulation layer and a display layer located between the substrate and the encapsulation layer. Document D3 shows a similar arrangement where a recess is formed in a substrate. Documents D4-D6 refer to further arrangements when forming a display device with a transparent area used to transmit light to a camera placed underneath.

The object of the invention is to provide a display screen and an electronic device that can effectively avoid affecting normal operation of optical components as a result of puncturing on the display screen. This object is solved by the attached independent claims and further embodiments and improvements of the invention are listed in the attached dependent claims. Hereinafter, up to the "brief description of the drawings", expressions like ". aspect according to the invention", "according to the invention", or "the present invention", relate to technical teaching of the broadest embodiment as claimed with the independent claims. Expressions like "implementation", "design", "optionally", "preferably", "scenario", "aspect", "specifically" or similar relate to further embodiments as claimed, and expressions like "example", ". aspect according to an example", "the disclosure describes", or "the disclosure" describe technical teaching which relates to the understanding of the invention or its embodiments, which, however, is not claimed as such. According to an aspect according to the invention, the invention provides a display screen, including a transparent substrate, an encapsulation layer, and a display layer located between the transparent substrate and the encapsulation layer, where the display layer has at least one first through hole that penetrates to both side surfaces of the display layer, and a first transparent filler is arranged within the at least one first through hole.

Specifically, the first transparent filler may be a gaseous substance or a solid substance.

For example, when the first transparent filler is a gaseous substance, air pressure in the first through hole can be effectively controlled by adjusting an amount of gas in the first through hole, so as to ensure that a pressure difference between the inside and the outside of the first through hole is small. This effectively prevents the transparent substrate and the encapsulation layer from being bent and deformed, so as to effectively prevent adverse impact of the deformation of the transparent substrate and the encapsulation layer on an optical component. When the first transparent filler is a solid substance, a volume of gas or vacuum within the first through hole can be reduced by occupying the space within the first through hole, so as to reduce the maximum pressure difference between the inside and the outside of the first through hole, thereby effectively preventing the transparent substrate and the encapsulation layer from being bent and deformed. The solid first transparent filler can further form a support and connection between the transparent substrate and the encapsulation film layer, preventing the transparent substrate and the encapsulation layer from being bent and deformed, thereby effectively preventing adverse impact of the deformation of the transparent substrate and the encapsulation layer on an optical component. In actual application, the first transparent filler may fill up the first through hole, or may be arranged in a partial area of the first through hole.

During specific not-claimed implementation, the first transparent filler may be a material that has a refractive index close to that of the transparent substrate or the encapsulation layer, so as to prevent the transparent substrate and the encapsulation layer from being deformed, and further reduce reflected light at an interface between the first transparent filler and the transparent substrate, and reflected light at an interface between the first transparent filler and the encapsulation layer, thereby improving working performance of an optical component such as a camera.

To reduce the reflected light at the interface between the first transparent filler and the transparent substrate, in some specific embodiments, a first antireflective film layer may be arranged at a position of the transparent substrate corresponding to the first through hole; or a second antireflective film layer may be arranged at a position of the encapsulation layer corresponding to the first through hole, so as to reduce intensity of the reflected light.

In addition, in some specific not-claimed embodiments, the first transparent filler may not be arranged in the first through hole, and adverse impact of display screen puncturing on an optical component is mitigated only by reducing the intensity of the reflected light. Specifically, when the first transparent filler is not filled in the first through hole, a first antireflective film layer may be arranged at a position of the transparent substrate corresponding to the first through hole, so as to reduce the intensity of the reflected light of the transparent substrate; correspondingly, a second antireflective film layer may be arranged at a position of the encapsulation layer corresponding to the first through hole, so as to reduce the intensity of the reflected light of the encapsulation film layer.

In addition, to prevent the transparent substrate and the encapsulation layer from affecting the normal operation of optical components such as the camera, in some specific embodiments, the distance between the transparent substrate and the encapsulation layer may be increased.

For example, at the first through hole, the distance between the transparent substrate and the encapsulation layer may be kept above <NUM> to effectively avoid affecting the normal operation of optical components such as the camera.

During specific implementation, a first recess may be arranged on a side surface of the transparent substrate directly facing the first through hole, so as to increase the distance between the transparent substrate and the encapsulation layer. Specifically, the first recess may be a blind hole, and a diameter of the blind hole and a diameter of the first through hole may be the same or substantially the same. During specific production, the first recess may be formed by processes such as etching and grinding. For example, when the transparent substrate is made of silicon oxide, hydrofluoric acid or the like can be used to process the transparent substrate to form the first recess. When the transparent substrate is made of polyimide, a process such as grinding can be used to process the transparent substrate to form the first recess.

According to the invention, a second recess similar to the first recess is arranged in the encapsulation layer.

The second recess is arranged on a side surface of the encapsulation layer directly facing the first through hole, so as to increase the distance between the transparent substrate and the encapsulation layer. Specifically, the second recess may be a blind hole, and a diameter of the blind hole and a diameter of the first through hole may be the same or substantially the same.

During specific production, the second recess may be formed by processes such as etching and grinding. For example, when the encapsulation layer is made of silicon oxide, hydrofluoric acid or the like can be used to process the encapsulation layer to form the second recess. When the encapsulation layer is made of polyimide, a process such as grinding can be used to process the encapsulation layer to form the second recess.

To increase the distance between the transparent substrate and the encapsulation layer at the first through hole, a distance between the entire transparent substrate and the entire encapsulation layer may alternatively be increased.

During specific not-claimed implementation, a thickness of the display layer may be appropriately increased, or a thickened film layer may be arranged between the display layer and the encapsulation layer.

During specific not-claimed implementation, the thickened film layer can be made of a material with good light permeability, or can be made of a material with good light-shielding properties.

Specifically, when the thickened film layer is made of a material with good light permeability (such as silicon oxide, polyimide, and the like), the thickened film layer does not affect a display effect of the light-emitting layer (that is, does not shield the light-emitting layer), and does not shield the first through hole, either. Therefore, the through hole structure may not be arranged in the area corresponding to the first through hole.

When the thickened film layer is made of a material with good light-shielding properties, in order not to affect the display effect of the display layer, the thickened film layer may include a plurality of blocks arranged at intervals, or the thickened film layer may be patterned to reduce the shielding of the display layer as far as possible, and at the same time, increase the distance between the transparent substrate and the encapsulation layer. In addition, to prevent the thickened film layer from shielding the first through hole, in some specific embodiments, a second through hole may be arranged in an area corresponding to the first through hole. During specific not-claimed implementation, projection of the second through hole on the display layer should completely cover the first through hole, that is, when the first through hole is coaxial with the second through hole, an aperture of the second through hole is not smaller than an aperture of the first through hole. When the first through hole is not coaxial with the second through hole, the aperture of the second through hole should be larger than the aperture of the first through hole, so as to prevent the thickened film layer from shielding the first through hole.

In some specific embodiments, the display screen may further include a polarizer, and the polarizer may be located on the side surface of the encapsulation layer away from the display layer; in order not to affect the working performance of optical components such as the camera, the polarizer is provided with a third through hole directly facing the first through hole, and projection of the third through hole on the display layer completely covers the first through hole.

Specifically, when the first through hole and the third through hole are arranged coaxially, an aperture of the third through hole should not be smaller than the aperture of the first through hole, so as to prevent the polarizer from shielding the first through hole; when the first through hole is not coaxial with the third through hole, the aperture of the third through hole should be larger than the aperture of the first through hole, so as to prevent the polarizer from shielding the first through hole.

In actual application, optical components such as the camera mounted below the display screen have an image capture angle similar to a cone; therefore, a diameter of the third through hole may be slightly larger than the diameter of the first through hole. During specific not-claimed implementation, the opening diameter of the first through hole may be minimized, so as to maximize the supporting effect of the display layer between the transparent substrate and the encapsulation layer, and prevent the transparent substrate and the encapsulation layer from being deformed. However, because a cathode layer or a wire (such as a driver circuit) in the display layer is usually made of a metal material, the cathode layer or the wire has a high light-reflecting characteristic. As a result, when watching the screen, a user sees a circle of bright lines formed by the reflection of the cathode layer. In some specific embodiments, the area of the thickened film layer close to the first through hole may be made of opaque material, so as to shield the exposed cathode layer.

In some other specific not-claimed embodiments, an additional light-shielding layer may alternatively be arranged to shield the exposed cathode layer.

Specifically, the display screen may further include a light-shielding layer, and the light-shielding layer may be arranged between the display layer and the encapsulation layer, and cover the projection area of the third through hole on the display layer. Because the aperture of the third through hole is larger than the aperture of the first through hole, the projection of the third through hole on the display layer is a circular ring area; during specific not-claimed implementation, the light-shielding layer may be a circular ring structure to well shield the exposed cathode layer. In other not-claimed embodiments, the light-shielding layer may alternatively be arranged on the side surface of the encapsulation layer away from the display layer, or the light-shielding layer may be arranged on both sides of the encapsulation layer.

During specific not-claimed implementation, the light-shielding layer may be made of ink, vinyl, or another material with good light-shielding properties.

In addition, in some specific not-claimed embodiments, to make the display screen have good structural strength and prevent the display screen from being damaged when subjected to external force, the display screen may further include a transparent cover plate. Specifically, the transparent cover plate may be attached to the side surface of the polarizer away from the encapsulation layer through materials such as OCA optically clear adhesive (Optically Clear Adhesive).

Because the polarizer is provided with a third through hole, to prevent deformation of the encapsulation layer, in some specific embodiments, a second transparent filler similar to the first transparent filler may further be arranged in the third through hole to effectively prevent phenomena such as rainbow patterns.

According to another aspect according to the invention, the invention further provides an electronic device, including an optical component and the display screen according to any one of the foregoing embodiments; the optical component is arranged directly facing the first through hole.

In some specific embodiments, the optical component may include a camera, a light sensor, a distance sensor, and the like. To increase a screen-to-body ratio of the screen, the optical component may be arranged below the display screen. In addition, the display screen may be provided with a plurality of light-transmitting hole structures that separately correspond to the optical component, so that external light can enter the light sensor and the distance sensor through the light-transmitting hole in the display screen.

There are many types of display screens. For example, in electronic devices (such as mobile phones, tablet computers, monitors, and TVs), at present, commonly used display screens mainly include two categories: LCD (Liquid Crystal Display) display screens and OLED (Organic Light-Emitting Diode) display screens.

As shown in <FIG>, an OLED display screen mainly includes a substrate <NUM>, an encapsulation layer <NUM>, and a light-emitting layer <NUM> arranged between the substrate <NUM> and the encapsulation layer <NUM>. The light-emitting layer <NUM> may include an anode layer <NUM>, a hole transport layer <NUM>, an organic light-emitting layer <NUM>, an electron transport layer <NUM>, a cathode layer <NUM>, and the like that are sequentially stacked from the substrate <NUM> to the encapsulation layer <NUM>. When the anode layer <NUM> and the cathode layer <NUM> are energized, electrons and holes migrate from the electron transport layer <NUM> and the hole transport layer <NUM> to the organic light-emitting layer <NUM>, and meet in the organic light-emitting layer <NUM> to form excitons and excite light-emitting molecules to produce visible light to achieve the purpose of display. Based on different bendable characteristics of the substrate <NUM>, the OLED display screen is divided into two categories: a flexible OLED display screen and a rigid OLED display screen. Specifically, the flexible OLED display screen may use materials such as polyimide as the substrate <NUM>, so that the flexible OLED display screen has good bendability; the rigid OLED display screen may use materials such as silicon oxide as the substrate <NUM>, so that the rigid OLED display screen has good rigidity.

As shown in <FIG>, a mobile phone is used as an example. In actual application, the front of the mobile phone needs to be provided with a display screen <NUM>, and further needs to be provided with optical components such as a camera <NUM> (which may alternatively be a light sensor or a distance sensor). To achieve a higher screen-to-body ratio, the display screen <NUM> may be provided with a light-transmitting hole <NUM>, and the optical components such as the camera <NUM> may be placed on a lower side of the display screen <NUM>, so that external light can enter the optical components such as the camera <NUM> through the light-transmitting hole <NUM>. In actual application, the light-transmitting hole <NUM> may be formed in a plurality of manners. For example, when the display screen <NUM> is made, a light-shielding part (such as a display layer <NUM>) may not be prepared in the area in which the light-transmitting hole <NUM> is to be formed. Alternatively, a light-shielding part (such as a display layer <NUM>) may be subsequently removed by using processes such as etching, so as to form the light-transmitting hole <NUM>.

Referring to <FIG>, in each composition structure of the display screen <NUM>, because the display layer <NUM> has poor light permeability, to form a light-transmitting hole <NUM> on the display screen <NUM>, the display layer <NUM> may be provided with a through hole <NUM>. However, in actual application, after the display layer <NUM> is punctured, the support between the encapsulation layer <NUM> and the substrate <NUM> at the through hole <NUM> is lost. As shown in <FIG>, for example, the display screen <NUM> is a rigid OLED display screen. When there is a pressure difference between the through hole <NUM> and the outside, the encapsulation layer <NUM> and the substrate <NUM> are deformed, causing adverse impact on the optical components such as the camera <NUM>. Specifically, after the external light enters the encapsulation layer <NUM>, a part of the light directly enters the optical components such as the camera <NUM> underneath through the substrate <NUM>; the other part of the light is reflected twice or more times between the encapsulation layer <NUM> and the substrate <NUM>, and then enters the optical components such as the camera <NUM> underneath through the substrate <NUM>. Because the encapsulation layer <NUM> and the substrate <NUM> are deformed at the through hole <NUM>, the distance between the encapsulation layer <NUM> and the substrate <NUM> is uneven. Consequently, the light directly entering the camera and the light entering the camera after a plurality of reflections interfere with each other, thereby affecting normal operation of the optical components such as the camera <NUM>. For example, when the optical component is the camera <NUM>, undesirable phenomena such as rainbow patterns appear. For this reason, the embodiments of this application provide a display screen that can effectively avoid the foregoing undesirable phenomena. Terms used in the following embodiments are merely intended for the purpose of describing specific embodiments, but not intended to limit this application. The terms "one", "a" and "this" of singular forms used in this specification and the appended claims of this application are also intended to include, for example, the form of "one or more", unless otherwise specified in the context clearly. It should be further understood that in the following embodiments of this application, "at least one" and "one or more" mean one, two, or more than two. The term "and/or" is used to describe an association relationship between associated objects, and indicates that three relationships may exist. A and B may be singular or plural. The character "/" generally indicates an "or" relationship between associated objects.

Referring to "one embodiment" or "some embodiments" or the like described in this specification means that one or more embodiments of this application include a specific feature, structure, or characteristic described with reference to the embodiment. Therefore, the statements "in one embodiment", "in some embodiments", "in some other embodiments", and the like appearing at different locations in this specification do not mean that these embodiments are all necessarily referred to, but mean "one or more but not all embodiments", unless otherwise specifically emphasized in other ways. The terms "include", "comprise", "have", and their variants all mean "including but not limited to", unless otherwise specifically emphasized in other ways.

As shown in <FIG>, in an embodiment provided in this application, the display screen <NUM> includes a transparent substrate <NUM>, an encapsulation layer <NUM>, and a display layer <NUM> located between the transparent substrate <NUM> and the encapsulation layer <NUM>. The display layer <NUM> has at least one first through hole <NUM> (only one is shown in the figure) that penetrates to both side surfaces of the display layer <NUM>. As shown in <FIG>, the at least one first through hole <NUM> is provided with a first transparent filler <NUM> for supporting the transparent substrate <NUM> and the encapsulation layer <NUM>.

Specifically, the first transparent filler <NUM> may be a gaseous substance or a solid substance. For example, when the first transparent filler <NUM> is a gaseous substance, which may be an inert gas such as nitrogen, ammonia, or fluorine, in actual application, air pressure in the first through hole <NUM> can be effectively controlled by adjusting an amount of gas in the first through hole <NUM>, so as to ensure that a pressure difference between the inside and the outside of the first through hole <NUM> is small. This effectively prevents the transparent substrate <NUM> and the encapsulation layer <NUM> from being bent and deformed, so as to effectively prevent adverse impact of the deformation of the transparent substrate <NUM> and the encapsulation layer <NUM> on an optical component. When the first transparent filler <NUM> is a solid substance, it may be materials such as indium tin oxide (Indium Tin Oxides, ITO), OCA optically clear adhesive (Optically Clear Adhesive), or the like, so as to form a support and connection between the transparent substrate <NUM> and the encapsulation layer <NUM>, preventing the transparent substrate <NUM> and the encapsulation layer <NUM> from being bent and deformed, thereby effectively preventing adverse impact of the deformation of the transparent substrate <NUM> and the encapsulation layer <NUM> on an optical component. In actual application, the first transparent filler <NUM> may fill up the first through hole <NUM>, or may be arranged in a partial area of the first through hole <NUM>.

During specific implementation, the transparent substrate <NUM> can be made of a material such as silicon oxide or silicon oxynitride, so that the display screen <NUM> has specific rigidity; the encapsulation layer <NUM> can be made of an inorganic material such as silicon oxide, silicon oxynitride, or polyamide, or be made of an organic material such as polyimide. The first transparent filler <NUM> may be a material that has a refractive index close to that of the transparent substrate <NUM> or the encapsulation layer <NUM>, so as to prevent the transparent substrate <NUM> and the encapsulation layer <NUM> from being deformed, and further reduce reflected light at an interface between the first transparent filler <NUM> and the transparent substrate <NUM>, and reflected light at an interface between the first transparent filler <NUM> and the encapsulation layer <NUM>, thereby improving working performance of an optical component such as a camera. Specifically, to improve the working performance of an optical component such as a camera, intensity of light reflected by the encapsulation layer <NUM> and the transparent substrate <NUM> may alternatively be reduced.

For example, to reduce the reflected light at the interface between the first transparent filler <NUM> and the transparent substrate <NUM>, in some specific embodiments, a first antireflective film layer <NUM> may be arranged at a position of the transparent substrate <NUM> corresponding to the first through hole <NUM>. In addition, in an embodiment not claimed, when the first transparent filler <NUM> is not arranged in the first through hole <NUM>, the first antireflective film layer <NUM> may be arranged at the position of the transparent substrate <NUM> corresponding to the first through hole <NUM>, so as to reduce the reflected light at the interface between (vacuum inside) the first through hole <NUM> and the transparent substrate <NUM>.

During specific implementation, as shown in <FIG>, the first antireflective film layer <NUM> may be arranged on a side surface of the transparent substrate <NUM> close to the first through hole <NUM>, so as to reduce the reflected light on the upper surface of the transparent substrate <NUM>. As shown in <FIG>, the first antireflective film layer <NUM> may alternatively be arranged on a side surface of the transparent substrate <NUM> away from the first through hole <NUM>, so as to reduce the reflected light on the lower surface of the transparent substrate <NUM>. In some specific embodiments, as shown in <FIG>, the first antireflective film layer <NUM> may alternatively be arranged on both sides of the transparent substrate <NUM>, so as to reduce the intensity of reflected light, thereby improving the working performance of the optical components such as the camera.

In addition, in some specific embodiments, the first transparent filler <NUM> may alternatively be arranged inside the first through hole <NUM>, and adverse impact of display screen puncturing on an optical component is mitigated only by reducing the intensity of the reflected light.

For example, to reduce the reflected light at the interface between the first transparent filler <NUM> and the encapsulation layer <NUM>, in some specific embodiments, a second antireflective film layer <NUM> may alternatively be arranged at the position of the encapsulation layer <NUM> corresponding to the first through hole <NUM>. In addition, in an embodiment not claimed, when the first transparent filler <NUM> is not arranged inside the first through hole <NUM>, the second antireflective film layer <NUM> may alternatively be arranged at the position of the encapsulation layer <NUM> corresponding to the first through hole <NUM>, so as to reduce the reflected light at the interface between (vacuum inside) the first through hole <NUM> and the encapsulation layer <NUM>.

During specific implementation, as shown in <FIG>, the second antireflective film layer <NUM> may be arranged on a side surface of the encapsulation layer <NUM> close to the first through hole <NUM>, so as to reduce the reflected light on the lower surface of the encapsulation layer <NUM>. As shown in <FIG>, the second antireflective film layer <NUM> may alternatively be arranged on a side surface of the encapsulation layer <NUM> away from the first through hole <NUM>, so as to reduce the reflected light on the upper surface of the encapsulation layer. In some specific embodiments, as shown in <FIG>, the second antireflective film layer <NUM> may alternatively be arranged on both sides of the encapsulation layer <NUM>, so as to reduce the intensity of reflected light, thereby improving the working performance of the optical components such as the camera.

As shown in <FIG>, in some other embodiments, while the first antireflective film layer <NUM> and the second antireflective film layer <NUM> are arranged, a first transparent filler <NUM> may further be arranged in the first through hole <NUM>, so as to effectively avoid affecting the normal operation of the optical components such as the camera.

In addition, to prevent the transparent substrate <NUM> and the encapsulation layer <NUM> from affecting the normal operation of optical components such as the camera, according to the claimed invention, the distance between the transparent substrate <NUM> and the encapsulation layer <NUM> is increased.

For example, in an embodiment provided in this application, at the first through hole <NUM>, the distance between the transparent substrate <NUM> and the encapsulation layer <NUM> may be kept above <NUM> to effectively avoid affecting the normal operation of the optical components such as the camera. During specific implementation, as shown in <FIG>, a first recess <NUM> may be arranged on a side surface of the transparent substrate <NUM> directly facing the first through hole <NUM>, so as to increase the distance between the transparent substrate <NUM> and the encapsulation layer <NUM> (at the first through hole <NUM>). Specifically, the first recess <NUM> may be a blind hole, and a diameter of the blind hole and a diameter of the first through hole <NUM> may be the same or substantially the same.

In some specific embodiments, a bottom surface of the first recess <NUM> may be a plane or a curved surface.

As shown in <FIG>, in an embodiment provided in this application, a bottom surface of the first recess <NUM> may be a plane. During specific implementation, as shown in <FIG>, the first transparent filler <NUM> may further be arranged in the first through hole <NUM> and the first recess <NUM> to effectively prevent the transparent substrate <NUM> and the encapsulation layer <NUM> from being bent and deformed.

As shown in <FIG>, in another embodiment provided in this application, the bottom surface of the first recess <NUM> is a concave curved surface. During specific not-claimed implementation, when the first transparent filler <NUM> is not arranged in the first through hole <NUM>, the transparent substrate <NUM> may be bent and deformed toward one side of the first through hole <NUM>. Referring to <FIG>, when the transparent substrate <NUM> is bent, the concave curved surface can be deformed to form a plane or a rough plane. This structural arrangement can also effectively avoid affecting the normal operation of optical components such as the camera. During specific implementation, curvature of the curved surface may be reasonably adjusted based on a degree of deformation the transparent substrate <NUM> can produce, so as to ensure that the curved surface can form a plane as far as possible after the transparent substrate <NUM> is bent and deformed. In addition, in some specific embodiments, as shown in <FIG>, a protruding portion <NUM> may alternatively be arranged on the side surface of the transparent substrate <NUM> away from the first through hole <NUM>. During specific implementation, a cambered surface of the protruding portion <NUM> may adapt to the concave curved surface in the first recess <NUM>. It can be understood that the transparent substrate <NUM> may have a micro-arch structure in the area corresponding to the first through hole <NUM>. Referring to <FIG>, when the transparent substrate <NUM> is bent, the concave curved surface in the first recess <NUM> and the convex cambered surface in the protruding portion <NUM> can be deformed to form a plane or a rough plane, thereby effectively improving the quality of light transmission.

During specific production, the first recess <NUM> may be formed by processes such as etching and grinding. For example, when the transparent substrate <NUM> is made of silicon oxide, hydrofluoric acid or the like can be used to process the transparent substrate <NUM> to form the first recess <NUM>. When the transparent substrate <NUM> is made of polyimide, a process such as grinding can be used to process the transparent substrate <NUM> to form the first recess <NUM>.

To increase the distance between the transparent substrate <NUM> and the encapsulation layer <NUM> at the first through hole <NUM>, according to the claimed invention, a second recess <NUM> similar to the first recess <NUM> is arranged in the encapsulation layer <NUM>.

As shown in <FIG>, according to the claimed invention, a second recess <NUM> is arranged on a side surface of the encapsulation layer <NUM> directly facing the first through hole <NUM>, so as to increase the distance between the transparent substrate <NUM> and the encapsulation layer <NUM> (at the first through hole <NUM>). Specifically, the second recess <NUM> may be a blind hole, and a diameter of the blind hole and a diameter of the first through hole <NUM> may be the same or substantially the same.

According to the claimed invention, a bottom surface of the second recess <NUM> is a plane or in a not-claimed embodiment, a curved surface.

As shown in <FIG>, according to the claimed invention, a bottom surface of the second recess <NUM> is a plane. As shown in <FIG>, the first transparent filler <NUM> is further arranged in the first through hole <NUM> and the second recess <NUM> to effectively prevent the encapsulation layer <NUM> from being bent and deformed.

As shown in <FIG>, in another not-claimed embodiment provided in this application, the bottom surface of the second recess <NUM> is a concave curved surface. During specific not-claimed implementation, when the first transparent filler <NUM> is not arranged in the first through hole <NUM>, the encapsulation layer <NUM> may be bent and deformed toward one side of the first through hole <NUM>. When the encapsulation layer <NUM> is bent, as shown in <FIG>, the concave curved surface can be deformed to form a plane or a rough plane. This structural arrangement can also effectively avoid affecting the normal operation of optical components such as the camera. During specific implementation, curvature of the curved surface may be reasonably adjusted based on a degree of deformation the encapsulation layer <NUM> can produce, so as to ensure that the curved surface can form a plane as far as possible after the encapsulation layer <NUM> is bent and deformed. In addition, in some specific not-claimed embodiments, as shown in <FIG>, a protruding portion <NUM> may alternatively be arranged on the side surface of the encapsulation layer <NUM> away from the first through hole <NUM>. During specific implementation, a cambered surface of the protruding portion <NUM> may adapt to the concave curved surface in the second recess <NUM>. It can be understood that the encapsulation layer <NUM> may have a micro-arch structure in the area corresponding to the first through hole <NUM>. Referring to <FIG>, when the encapsulation layer <NUM> is bent, the concave curved surface in the second recess <NUM> and the convex cambered surface in the protruding portion <NUM> can be deformed to form a plane or a rough plane, thereby effectively improving the quality of light transmission.

During specific production, the second recess <NUM> may be formed by processes such as etching and grinding. For example, when the encapsulation layer <NUM> is made of silicon oxide, hydrofluoric acid or the like can be used to process the encapsulation layer <NUM> to form the second recess <NUM>. When the encapsulation layer <NUM> is made of polyimide, a process such as grinding can be used to process the encapsulation layer <NUM> to form the second recess <NUM>.

To increase the distance between the transparent substrate <NUM> and the encapsulation layer <NUM> at the first through hole <NUM>, a distance between the entire transparent substrate <NUM> and the entire encapsulation layer <NUM> may alternatively be increased.

For example, not claimed, a thickness of a display layer <NUM> may be appropriately increased to keep the thickness of the display layer <NUM> above <NUM>.

In some specific not-claimed embodiments, the distance between the transparent substrate <NUM> and the encapsulation layer <NUM> may alternatively be increased by adding another film layer.

For example, as shown in <FIG>, in an embodiment provided in this application, a thickened film layer <NUM> may be arranged between the display layer <NUM> and the encapsulation layer <NUM>, so as to increase the distance between the encapsulation layer <NUM> and the transparent substrate <NUM>.

During specific implementation, the thickened film layer <NUM> can be made of a material with good light permeability, or can be made of a material with good light-shielding properties.

Specifically, when the thickened film layer <NUM> is made of a material with good light permeability (such as silicon oxide, polyimide, and the like), the thickened film layer <NUM> does not affect a display effect of the light-emitting layer <NUM> (that is, does not shield the light-emitting layer <NUM>), and does not shield the first through hole <NUM>, either. Therefore, the through hole structure may not be arranged in the area corresponding to the first through hole <NUM>.

When the thickened film layer <NUM> is made of a material with good light-shielding properties, in order not to affect the display effect of the display layer <NUM>, as shown in <FIG>, the thickened film layer <NUM> may include a plurality of blocks <NUM> arranged at intervals, or the thickened film layer <NUM> may be patterned to reduce the shielding of the display layer <NUM> as far as possible, and at the same time, increase the distance between the transparent substrate <NUM> and the encapsulation layer <NUM>. In addition, to prevent the thickened film layer <NUM> from shielding the first through hole <NUM>, in some specific embodiments, a second through hole <NUM> may be arranged in an area corresponding to the first through hole <NUM>. During specific implementation, projection of the second through hole <NUM> on the display layer <NUM> should completely cover the first through hole <NUM>, that is, when the first through hole <NUM> is coaxial with the second through hole <NUM>, an aperture of the second through hole <NUM> is not smaller than an aperture of the first through hole <NUM>. When the first through hole <NUM> is not coaxial with the second through hole <NUM>, the aperture of the second through hole <NUM> should be larger than the aperture of the first through hole <NUM>, so as to prevent the thickened film layer <NUM> from shielding the first through hole <NUM>.

In some specific embodiments, the thickened film layer <NUM> may alternatively be formed by a mixture of a light-transmitting material and a light-shielding material.

For example, as shown in <FIG>, in an embodiment provided in this application, a partial area <NUM> of the thickened film layer <NUM> has good light permeability, and another partial area <NUM> of the thickened film layer <NUM> has good light-shielding properties.

In some specific embodiments, a light-transmitting area and an opaque area in the thickened film layer <NUM> may alternatively be dedicatedly arranged.

For example, as shown in <FIG>, in an embodiment provided in this application, the display screen <NUM> further includes a polarizer <NUM>, and the polarizer <NUM> is located on the side surface of the encapsulation layer <NUM> away from the display layer <NUM>; in order not to affect the working performance of optical components such as the camera, the polarizer is provided with a third through hole <NUM> directly facing the first through hole <NUM>, and projection of the third through hole <NUM> on the display layer <NUM> completely covers the first through hole <NUM>.

Specifically, when the first through hole <NUM> and the third through hole <NUM> are arranged coaxially, an aperture of the third through hole <NUM> should not be smaller than the aperture of the first through hole <NUM>, so as to prevent the polarizer <NUM> from shielding the first through hole <NUM>; when the first through hole <NUM> is not coaxial with the third through hole <NUM>, the aperture of the third through hole <NUM> should be larger than the aperture of the first through hole <NUM>, so as to prevent the polarizer <NUM> from shielding the first through hole <NUM>.

Further referring to <FIG>, the camera <NUM> is used as an example. In actual application, an image capture angle of the camera <NUM> is similar to a cone. Therefore, the diameter of the third through hole <NUM> may be slightly larger than the diameter of the first through hole <NUM>. During specific implementation, the opening diameter of the first through hole <NUM> may be minimized, so as to maximize the supporting effect of the display layer <NUM> between the transparent substrate <NUM> and the encapsulation layer <NUM>, and prevent the transparent substrate <NUM> and the encapsulation layer <NUM> from being deformed. However, because a cathode layer <NUM> or a wire (such as a driver circuit) in the display layer <NUM> is usually made of a metal material, the cathode layer or the wire has a high light-reflecting characteristic. As a result, when watching the screen, a user sees a circle of bright lines formed by the reflection of the cathode layer <NUM>. In some specific embodiments, an area of the thickened film layer <NUM> close to the first through hole <NUM> may be made of opaque material, so as to shield the exposed cathode layer <NUM>.

In some other specific embodiments, an additional light-shielding layer <NUM> may alternatively be arranged to shield the exposed cathode layer <NUM>.

Specifically, as shown in <FIG>, in an embodiment provided in this application, the display screen <NUM> may further include a light-shielding layer <NUM>, and the light-shielding layer <NUM> may be arranged between the display layer and the encapsulation layer <NUM>, and cover the projection area of the third through hole <NUM> on the display layer <NUM>.

Specifically, because the aperture of the third through hole <NUM> is larger than the aperture of the first through hole <NUM>, the projection of the third through hole <NUM> on the display layer <NUM> is a circular ring area (that is, the area in which the cathode layer <NUM> is exposed); during specific implementation, the light-shielding layer <NUM> may be a circular ring structure to well shield the exposed cathode layer <NUM>. In other embodiments, the light-shielding layer <NUM> may alternatively be arranged on the side surface of the encapsulation layer <NUM> away from the display layer, or the light-shielding layer <NUM> may be arranged on both sides of the encapsulation layer <NUM>.

During specific implementation, the light-shielding layer <NUM> may be made of ink, vinyl, or another material with good light-shielding properties.

In some specific embodiments, the light-shielding layer <NUM> may alternatively be formed on the cathode layer <NUM> by using a process such as electroplating or spraying; alternatively, as shown in <FIG>, the exposed cathode layer <NUM> may be removed by using a process such as etching.

It can be understood that, in the foregoing embodiment, the first transparent filler <NUM> may still be arranged in the first through hole <NUM> to prevent the transparent substrate <NUM> and the encapsulation layer <NUM> from being deformed.

In addition, in some specific embodiments, as shown in <FIG>, a light-shielding material <NUM> (such as vinyl) may alternatively be arranged on an inner wall of the first through hole <NUM> to effectively prevent generation of bright lines, and further effectively prevent overflow of the first transparent filler <NUM> in the first through hole <NUM>.

In addition, in some specific embodiments, to make the display screen <NUM> have good structural strength and prevent the display screen <NUM> from being damaged when subjected to external force, the display screen <NUM> may further include a transparent cover plate <NUM>.

As shown in <FIG>, the transparent cover plate <NUM> may be attached to the side surface of the polarizer <NUM> away from the encapsulation layer <NUM> through materials such as OCA optically clear adhesive (Optically Clear Adhesive). During specific implementation, the transparent cover plate <NUM> may be a glass plate or a plate-like structure made of polyimide or another material.

In addition, in some specific embodiments, because the polarizer <NUM> is provided with a third through hole <NUM>, to prevent the encapsulation layer <NUM> from being deformed, referring to <FIG>, in some specific embodiments, a second transparent filler <NUM> similar to the first transparent filler <NUM> may further be arranged in the third through hole <NUM>. Specifically, the second transparent filler <NUM> may be a gaseous substance or a solid substance. For example, when the second transparent filler <NUM> is a gaseous substance, which may be an inert gas such as nitrogen, ammonia, or neon, in actual application, air pressure in the third through hole <NUM> can be effectively controlled by adjusting an amount of gas in the third through hole <NUM>, so as to ensure that a pressure difference between the inside and the outside of the third through hole <NUM> is small. This effectively prevents undesirable phenomena such as rainbow patterns. When the second transparent filler <NUM> is a solid substance, it may be materials such as indium tin oxide (Indium Tin Oxides, ITO), OCA optically clear adhesive (Optically Clear Adhesive), or the like, so as to form a support and connection between the transparent cover plate <NUM> and the encapsulation layer <NUM>, preventing the transparent cover plate <NUM> and the encapsulation layer <NUM> from being bent and deformed, thereby effectively preventing undesirable phenomena such as rainbow patterns. In actual application, the second transparent filler <NUM> may fill up the third through hole <NUM>, or may be arranged in a partial area of the third through hole <NUM>.

In addition, as shown in <FIG>, an embodiment of this application further provides an electronic device <NUM>. The electronic device <NUM> may be specifically a mobile phone, a tablet computer, a monitor, a TV, or the like. For example, the electronic device <NUM> is a mobile phone. The mobile phone may include a camera <NUM> and the display screen <NUM> in any one of the foregoing embodiments.

During specific implementation, the camera <NUM> may be mounted below the display screen <NUM>, and is arranged directly facing a light-transmitting hole <NUM> (a first through hole <NUM> in a display layer <NUM>) in the display screen <NUM>, so that external light can enter the camera <NUM> through the light-transmitting hole <NUM>.

In another embodiment, in addition to the camera <NUM>, the mobile phone may further be provided with a light sensor <NUM> and a distance sensor <NUM>. To achieve a high screen-to-body ratio, the light sensor <NUM> and the distance sensor <NUM> may be mounted below the display screen <NUM>. In addition, to ensure normal operation of the light sensor <NUM> and the distance sensor <NUM>, two light-transmitting holes <NUM> that are respectively opposite to the light sensor <NUM> and the distance sensor <NUM> may be additionally arranged in the display screen <NUM>.

During specific implementation, a quantity and position arrangement of the light-transmitting holes <NUM> may be adjusted based on actual conditions. In addition, sizes of the light-transmitting holes <NUM> may be the same or different.

Claim 1:
A display screen (<NUM>), the display screen (<NUM>) being an OLED display screen comprising a substrate (<NUM>), an encapsulation layer (<NUM>), and a display layer (<NUM>) located between the substrate (<NUM>) and the encapsulation layer (<NUM>), wherein the substrate (<NUM>) is a transparent substrate, and
the display layer (<NUM>) has at least one first through hole (<NUM>) that penetrates to both side surfaces of the display layer (<NUM>);
a first transparent filler (<NUM>) is arranged within the at least one first through hole (<NUM>);
a second recess (<NUM>) recessed into a surface of the encapsulation layer (<NUM>) directly facing the first through hole (<NUM>) wherein a bottom surface of the second recess (<NUM>) is a plane.