Patent Description:
A hole-punch screen is a design that can increase the screen ratio of a mobile phone. A hole-punch screen means that a through hole is punched on a display panel (commonly known as "hole punch" in the industry) and a front camera is aligned with the through hole. In order to prevent external water and oxygen from entering a display area of the display panel from the through hole, an outer circumference of the through hole is surrounded by an isolation column, which isolates the through hole from the display area of the display panel. However, the structure of the isolation column is complex, which leads to the high manufacturing cost of the display panel.

<CIT> discloses a display device that includes: a light-emitting substrate including a base substrate having a non-display area and a display area that surrounds the non-display area; an input sensing unit disposed on the light-emitting substrate; and a hole penetrating front and rear surfaces of each of the light-emitting substrate and the input sensing unit, wherein the light-emitting substrate includes a plurality of recesses, the non-display area includes a hole area which overlaps with the hole, a recess area in which the plurality of recesses are disposed and surrounds the hole area, and a peripheral area which surrounds the recess area, and the input sensing unit includes a plurality of first sensor members overlapping the display area and a first connector connecting the first sensor members and overlapping the groove area.

<CIT> discloses an organic light-emitting display device and a fabrication method thereof.

<CIT> discloses an organic light emitting display device and method of manufacturing an organic light emitting display device.

<CIT> and <CIT> disclose organic light emitting display devices comprising a through hole in the display area.

This application provides a display panel and a manufacturing method therefor, a display screen, and an electronic device, which can isolate water and oxygen from a through hole with a relatively simple structure, thereby reducing the manufacturing cost.

In a first aspect, this application provides a display panel, which can be laminated to a cover plate. The display panel is as recited in claim <NUM>.

In this application, the thin film transistor backplane may be used as a carrying backplane of the organic layer. The thin film transistor backplane may include a substrate and a thin film transistor array formed on the substrate. The display area and the non-display area are divided based on the overall area of the display panel, and all the stacked layers in the display panel such as the thin film transistor backplane, the organic layer, and the packaging layer each have a part located in the display area and a part located in the non-display area. The non-display area surrounds the through hole by one round, and the shape of the non-display area can be adapted to the shape of the through hole. The display area surrounds an outer circumference of the non-display area. Because the first organic layer in the organic layer can emit light to implement image display, the area where the first organic layer is located can also be considered as the display area. The display unit is a pixel, and one display unit may include one red sub-pixel R, one green sub-pixel G, and one blue sub-pixel B. Each display unit can emit a light ray, so that the display panel implements image display. The first groove surrounds the through hole by one round. The packaging layer is configured to package and protect the organic layer which is apt to be invaded by an external environment (such as water and oxygen), and the packaging layer may be made of a material with stable properties (such as an inorganic material, or an organic materials plus an inorganic material). The packaging layer may be made, for example, by a thin film packaging process. A part of the material of the packaging layer is filled in the first groove, to partition the second organic layer.

In the solution of this application, the first groove is provided at the part of the organic layer which is located in the non-display area, and the packaging layer is filled in the first groove to partition the organic layer, so that external water and oxygen entering from the through hole can be blocked at the first groove, and the external water and oxygen can be prevented from invading the display area along the organic layer. Because the structure of the first groove is simple and easy to process, the manufacturing cost is low.

According to a possible implementation of the first aspect, a width of the first groove on a side close to the packaging layer is greater than the width of the first groove on a side away from the packaging layer. Such the first groove has a trapezoidal cross section, which facilitates full deposition of the material of the packaging layer in the first groove and ensures a partition effect for the organic layer.

According to a possible implementation of the first aspect, the thin film transistor backplane includes a substrate and a dam disposed on the substrate, the dam being located in the non-display area and disposed around the through hole; the organic layer covers the substrate and the dam, and the first groove is spaced apart from the dam; the packaging layer includes a first inorganic packaging layer, an organic packaging layer, and a second inorganic packaging layer; the first inorganic packaging layer covers the organic layer and is filled in the first groove; the organic packaging layer covers a part of the first inorganic packaging layer located on an outer circumference of the dam; and the second inorganic packaging layer covers the organic packaging layer and the first inorganic packaging layer.

In this implementation, the substrate is a base film for forming a packaging layer and an organic layer. The substrate may be formed by stacking a plurality of layers of materials. The dam may be spaced apart from the thin film transistor array mentioned above. The dam surrounds the through hole by one round. The position relationship between the dam and the first groove may be designed as needed, for example, the dam may surround an outer side of the first groove, the first groove may surround an outer side of the dam, or the first groove is provided in both inner and outer sides of the dam. The dam is configured to block the organic packaging material in the organic packaging layer (the organic packaging material is easy to flow) and prevent the organic packaging material from crossing a designed position. The first inorganic packaging layer may be made of an inorganic material, such as SiNx and/or SiO2. The first inorganic packaging layer is filled in the first groove and partitions the organic layer. The organic packaging layer may be made of an organic material such as an epoxy resin type organic material and polymethyl methacrylate. The second inorganic packaging layer may be made of an inorganic material, such as SiNx and/or SiO2. Such the "sandwich" structure composed of the first inorganic packaging layer, the organic packaging layer, and the second inorganic packaging layer has a good packaging performance.

According to a possible implementation of the first aspect, first grooves are provided in both the inner and outer sides of the dam, and all of the first grooves are in the non-display area. Such the design can strengthen the isolation effect of the first groove for water and oxygen, and ensure that water and oxygen cannot invade the display area. According to the claimed invention, the width of the first groove on the side close to the thin film transistor backplane is <NUM>-<NUM> and the width of the first groove on the side away from the thin film transistor backplane is <NUM>-<NUM>. Such the design makes the overall width of the first groove extremely small, so that the non-display area can have a small width, and therefore the opaque area in the cover plate can also be made narrow, thereby being beneficial to increase of the screen ratio of an electronic device.

According to a possible implementation of the first aspect, the substrate is provided with a second groove, which forms an opening on a surface of the substrate facing the organic layer, where the second groove does not run through the substrate and the second groove is located between the dam and the through hole and surrounds the through hole; and the first groove is located on an outer circumference of the second groove.

In this implementation, the second groove surrounds the through hole by one round. Among the dam, the first groove, and the second groove, the second groove is closest to the through hole. Stress concentration may occur near the through hole, resulting in a crack in the display panel. The design of the second groove can prevent the crack from extending from the through hole to the display area, thereby avoiding damage to the display area and ensuring the reliability of the display area.

According to a possible implementation of the first aspect, the display panel includes a touch layer, which covers the packaging layer; and the through hole runs through the touch layer. The touch layer includes touch units arranged in an array and configured to implement a touch operation of the display panel. The touch layer may be located on the side of the packaging layer away from the organic layer, for example, the touch layer may be laminated to the packaging layer through an adhesive layer. Alternatively, the touch layer may be integrated with the packaging layer, that is, the touch layer is formed together in the manufacturing process of the display panel (the touch layer may be used as a composition of the display panel), instead of laminating an independent touch layer to the packaging layer. The design of integrating the touch layer with the packaging layer can reduce the overall thickness of the display panel.

In a second aspect, this application provides a display screen as recited in claim <NUM>. The cover plate is hard in texture and may provide touch sense and a force feedback to a user when the user touches it. The cover plate may be a rigid cover plate, which cannot be bent and can be applied to a rigid display screen. Alternatively, the cover plate may be a flexible cover plate, which is easy to bend and can be applied to a folding display screen. The cover plate can be bonded to the display panel. All areas of the cover plate can transmit light; or a part of the cover plate is opaque and the opaque area of the cover plate positionally corresponds to a non-display area of the display panel.

According to a possible implementation of the second aspect, the cover plate includes a first transparent area, an opaque area, and a second transparent area, where the first transparent area is disposed around the opaque area and the opaque area is disposed around the second transparent area; and the display area is located in the first transparent area, the opaque area corresponds to the non-display area, and the second transparent area corresponds to the through hole. The first transparent area surrounds an outer circumference of the opaque area and the opaque area surrounds an outer circumference of the second transparent area. The opaque area may be formed by coating light-shielding ink on a surface of the cover plate facing the display panel, and the other area of the cover plate may be divided into a first transparent area and a second transparent area. Therefore, a light ray emitted by the display panel can be emitted from the first transparent area of the cover plate, so that the user can watch a picture. An external light ray can pass through the second transparent area and enter the through hole. The opaque area on the cover plate can cover the non-display area of the display panel to ensure the simple appearance of the display screen.

According to a possible implementation of the second aspect, a boundary of the opaque area and the second transparent area falls within a boundary of the through hole. The boundary refers to a border between the opaque area and the second transparent area, and the border is located inside the through hole. That is, the opaque area extends to an inner side of the through hole. Such the design can ensure the blocking effect of the opaque area on the non-display area, and avoid the situation that the non-display area is not completely blocked and exposed due to manufacturing errors or assembly errors.

In a third aspect, this application provides an electronic device as recited in claim <NUM>.

In this application, the optical module is configured to sense an external light ray, to generate an electrical signal. After being processed by an electronic device, the electrical signal can be converted into target information. The optical module includes, but is not limited to, at least one of a camera module, an infrared lens, a dot matrix projector, a distance sensor, an ambient light sensor, a proximity light sensor, or the like. The correspondence between the optical module and the through hole means that the positions of the optical module and the through hole can be close, to ensure that the optical module can acquire a light ray passing through the through hole. The optical module <NUM> is disposed inside the through hole, to ensure that an optical module <NUM> can acquire more light rays passing through a through hole 15c, and the camera module may alternatively be disposed outside the through hole 15c, to ensure that light rays pass through the camera module to form an image. For example, the optical module and the through hole may be aligned, that is, in an axial direction of the through hole, a projection of the optical module overlaps with a projection of the through hole. It may also mean that an optical axis of the optical module substantially coincides with an axis of the through hole 15c, and errors are allowed, as long as the light rays can pass through the camera module to form an image. The electronic device of this application not only has a low manufacturing cost, but also has a large screen ratio.

In a fourth aspect, this application provides a method for manufacturing a display panel as recited in claim <NUM>.

In this application, the first organic layer can emit light to cause the display panel to display an image, the area where the first organic layer is located may be referred to as a display area, and therefore, forming of the first organic layer is forming of the display area. Correspondingly, the second organic layer cannot emit light, the area where the second organic layer is located may be referred to as a non-display area, and therefore, forming of the second organic layer is forming of the non-display area. The through hole runs through all stacked layers of a prefabricated panel. The first groove surrounds an outer circumference of the through hole. In the solution of this application, the first groove is provided at the part of the organic layer which is located in the non-display area, and the packaging layer is filled in the first groove to partition the organic layer, so that external water and oxygen entering from the through hole can be blocked at a packaging groove, and the external water and oxygen can be prevented from invading the display area along the organic layer. Because the structure of the packaging groove is simple and easy to process, the manufacturing cost is low.

According to a possible implementation of the fourth aspect, the forming a first groove around the second organic layer by one round includes: forming the first groove by laser etching. A basic principle of laser etching is to focus a low-power laser beam with high beam quality (for example, may be ultraviolet laser, fiber laser, or the like) into an extremely small light spot, and form an extremely high power density at the focus, so that a material of the second organic layer vaporizes and evaporates instantly, to form the first groove. Laser etching has a small heat affected zone, can ablate the machining area quite accurately, has an extremely high machining accuracy and machining quality, and therefore can etch the first groove having an extremely small width. This is beneficial to reduce the width of the non-display area, so that the opaque area on the cover plate can be made narrow, thereby being beneficial to increase of the screen ratio of an electronic device. Moreover, because the laser etching can focus into an extremely small light spot at a laser wavelength level, the second organic layer can be completely etched away, which is beneficial to the filling of the packaging layer. In addition, the laser etching is suitable for processing a flexible material without contact with and contamination of the second organic layer.

According to a possible implementation of the fourth aspect, in the step of forming a first groove around the second organic layer by one round, so that the first groove runs through the second organic layer, a width of the first groove on a side away from the thin film transistor backplane is greater than the width of the first groove on a side close to the thin film transistor backplane. Such the first groove has a trapezoidal cross section, which facilitates full deposition of the material of the packaging layer in the first groove and ensures a partition effect for the organic layer.

According to a possible implementation of the fourth aspect, the "manufacturing a thin film transistor backplane" includes: manufacturing a substrate; and forming a dam around the substrate by one round. In the step of forming an organic layer on the thin film transistor backplane, the first organic layer is enabled to cover the substrate and the second organic layer is enabled to cover the substrate and the dam. In the step of forming a first groove surrounding the second organic layer by one round, so that the first groove runs through the second organic layer, the dam is disposed around the first groove. The forming a packaging layer on the organic layer, so that the packaging layer covers the first organic layer and the second organic layer and is filled in the first groove includes: forming a first inorganic packaging layer on the organic layer, so that the first inorganic packaging layer covers the first organic layer and the second organic layer and is filled in the first groove; forming an organic packaging layer on the first inorganic packaging layer, so that the organic packaging layer covers a part of the first inorganic packaging layer located on an outer circumference of the dam; and forming a second inorganic packaging layer, so that the second inorganic packaging layer covers the organic packaging layer and the first inorganic packaging layer. The forming a touch layer and a polarizing layer on the packaging layer includes: forming the touch layer and the polarizing layer on the second inorganic packaging layer. Through the implementation, a "sandwich" structure composed of a first inorganic packaging layer, an organic packaging layer, and a second inorganic packaging layer can be prepared, and such the packaging layer of the "sandwich" structure has a good packaging performance.

According to a possible implementation of the fourth aspect, in the step of forming a first groove around the second organic layer by one round, so that the first groove runs through the second organic layer, at least two first grooves are provided, so that at least one of the first grooves is located on an inner circumference of the dam and that the rest of the first grooves are disposed around an outer circumference of the dam. Through this implementation, first grooves are formed in both the inner and outer sides of the dam, which can strengthen the isolation effect of the first groove for water and oxygen, and ensure that the water and oxygen cannot invade the display area.

According to a possible implementation of the fourth aspect, the forming an organic packaging layer on the first inorganic packaging layer, so that the organic packaging layer covers a part of the first inorganic packaging layer located on an outer circumference of the dam includes: printing an organic material on the part of the first inorganic packaging layer located on the outer circumference of the dam by ink jet printing; and curing the organic material to obtain the organic packaging layer. An ink jet printing process has a low cost and high reliability.

According to the claimed invention, the width of the first groove on the side away from the thin film transistor backplane is <NUM>-<NUM> and the width of the first groove on the side close to the thin film transistor backplane is <NUM>-<NUM>. Such the design makes the overall width of the first groove extremely small, so that the non-display area can have a small width, and therefore the opaque area in the cover plate can also be made narrow, thereby being beneficial to increase of the screen ratio of an electronic device.

According to a possible implementation of the fourth aspect, between the manufacturing a thin film transistor backplane and the forming an organic layer on the thin film transistor backplane, the manufacturing method further includes: forming a second groove surrounding the thin film transistor backplane by one round, where the second groove does not run through the thin film transistor backplane. In the step of forming an organic layer on the thin film transistor backplane, the second organic layer is filled in the second groove. In the step of forming a first groove surrounding the second organic layer by one round, so that the first groove runs through the second organic layer, the first groove is provided around the second groove. In the step of forming a through hole in the prefabricated panel, so that the through hole is provided on an inner side of the first groove, the through hole is located on an inner side of the second groove.

According to a possible implementation of the fourth aspect, the manufacturing a thin film transistor backplane includes: providing a rigid carrier plate; forming at least two layers of organic polymer materials and at least two layers of inorganic materials on the rigid carrier plate, so that the at least two layers of organic polymer materials and the two layers of inorganic materials are alternately stacked, where one layer of the organic polymer material is laminated to the rigid carrier plate, to prepare the substrate. Between the forming a packaging layer on the organic layer, so that the packaging layer covers the first organic layer and the second inorganic layer and is filled in the first groove and the forming a touch layer and a polarizing layer on the packaging layer, so that the touch layer is located between the packaging layer and the polarizing layer, to obtain the prefabricated panel, or between the forming a touch layer and a polarizing layer on the packaging layer, so that the touch layer is located between the packaging layer and the polarizing layer, to obtain the prefabricated panel and the providing a through hole on the prefabricated panel, so that the through hole is located on an inner side of the first groove, the manufacturing method further includes: lifting off the rigid carrier plate. This implementation is used for manufacturing a flexible and easy-to-bend substrate. A display panel having such a flexible substrate can be used in a folding display screen.

According to a possible implementation of the fourth aspect, the forming a touch layer and a polarizing layer on the packaging layer includes: forming the touch layer on the packaging layer; and forming the polarizing layer on the touch layer through a coating process. In the coating process, a polarizing liquid is coated on the touch layer, and then the polarizing liquid is cured, to obtain a polarizing layer. A polarizer prepared in this method is thin, which is beneficial to reduce the overall thickness of the display panel.

In a fifth aspect, this application provides a display screen, including a display panel, which is manufactured by the manufacturing method according to the implementations of the fourth aspect.

In a sixth aspect, this application provides an electronic device, including a display panel, which is manufactured by the manufacturing method according to the implementations of the fourth aspect.

The following embodiment of this application provides an electronic device, including, but not limited to, a mobile phone, a tablet computer, a vehicle-mounted device (for example, a car machine), a wearable device (for example, a smart watch, a virtual reality device, an augmented reality device), a smart screen device, and the like. The electronic device is provided with a display screen. A mobile phone is used as an example for description of the electronic device in the following.

As shown in <FIG> and <FIG>, an electronic device <NUM> of Embodiment <NUM> may include a shell <NUM>, an optical module <NUM>, and a display screen <NUM>.

The shell <NUM> serves as a structural bearing member of the electronic device <NUM> for mounting the display screen <NUM> and the optical module <NUM> and for accommodating or mounting other components (for example, a circuit board assembly). The shell <NUM> may be an assembly. The key design of this embodiment of this application does not lie in the shell <NUM> and the specific structure of the shell <NUM> is not limited.

The display screen <NUM> may be a flat screen, that is, the display screen <NUM> has a flat plate shape, an edge of which is not curved to form a cambered surface. Alternatively, the display screen <NUM> may be a curved screen, an edge of which is curved to form an arc surface. On the other hand, the display screen <NUM> may be a rigid screen that cannot be bent or may be a foldable screen that can be folded.

As shown in <FIG> and <FIG>, the display screen <NUM> may include a cover plate <NUM> and a display panel <NUM>, the cover plate <NUM> is laminated to the display panel <NUM>, and the display panel <NUM> is enclosed by the cover plate <NUM> and the shell <NUM>. The cover plate <NUM> is configured to protect the display panel <NUM>. The cover plate <NUM> is hard in texture and may provide touch sense and a force feedback to a user when the user touches it. The cover plate <NUM> may be a rigid cover plate, which cannot be bent, and such the cover plate <NUM> can be applied to a rigid display screen. Alternatively, the cover plate <NUM> may be a flexible cover plate, which is easy to bend, and such the cover plate <NUM> can be applied to a foldable screen.

As shown in <FIG> and <FIG> is a schematic sectional view of the display screen <NUM> along A-A in <FIG>, which may illustrate a position relationship between the cover plate <NUM> and the display panel <NUM>), the cover plate <NUM> may be provided with a first transparent area 14a, an opaque area 14b, and a second transparent area 14c. The second transparent area 14c may be approximately a circular area. The second transparent area 14c allows transmission of an external light ray and facilitates reception of the external light ray by the optical module <NUM> (which is continuously described below). The opaque area 14b surrounds an outer circumference of the second transparent area 14c (that is, surrounding by one round, hereinafter the same), to form an approximately circular area. A light ray cannot pass through the opaque area 14b, so that a structure of the display panel <NUM> located below the opaque area 14b is blocked from being visible (which is continuously described below). The opaque area 14b and the second transparent area 14c may be close to an edge of the cover plate <NUM>, for example, at a corner of the cover plate <NUM> or at a middle of one edge. If the cover plate <NUM> is a curved cover plate, both the opaque area 14b and the second transparent area 14c are located in a flat portion of the curved cover plate. The first transparent area 14a surrounds the outer circumference of the second transparent area 14c, and an outer boundary of the first transparent area 14a may substantially extend to a circumference of the cover plate <NUM>, that is, the first transparent area 14a may substantially be an area of the cover plate <NUM> apart from the opaque area 14b and the second transparent area 14c. The first transparent area 14a allows a light ray emitted by the display panel <NUM> to pass through, so that a user can see a picture (which is continuously described below). The shapes of the opaque area 14b and the second transparent area 14c are merely an example and this embodiment of this application is not limited thereto. For example, the second transparent area 14c may be approximately an elliptical area (similar to an elliptical runway) and the opaque area 14b may be an elliptical ringlike area.

As shown in <FIG>, in Embodiment <NUM>, light-shielding ink 14d may be coated on a partial surface of the cover plate <NUM> facing the display panel <NUM>, to manufacture an opaque area 14b. In <FIG>, a black area on the surface of the cover plate <NUM> facing the display panel <NUM> represents the light-shielding ink 14d. Certainly, this is merely an example and the opaque area 14b may actually be formed in other manners. Alternatively, unlike Embodiment <NUM>, the cover plate in another embodiment is not coated with the light-shielding ink 14d and the entire area of the cover plate is transparent. Such the cover plate does not shield the structure of the display panel <NUM>, so that a user can observe all areas of the display panel <NUM>, which can produce a unique appearance experience.

In Embodiment <NUM>, the display panel <NUM> may be flexible and easy to bend, that is, the display panel <NUM> may be a flexible display panel. The display panel <NUM> includes, but is not limited to, an organic light emitting diode (organic light emitting diode, OLED) panel, a quantum dot light emitting diode (quantum dot light emitting diode, QLED) panel, and the like. The display panel <NUM> is configured to display an image. Light rays emitted by the display panel <NUM> may be emitted from the first transparent area 14a, so that a user can see an image in the first transparent area 14a.

As shown in <FIG> and <FIG>, the display panel <NUM> includes a through hole 15c, a non-display area 15b, and a display area 15a. The through hole 15c runs through the display panel <NUM> and an axis of the through hole 15c may be along a thickness direction of the display panel <NUM>. The shape of the through hole 15c may be similar to that of the second transparent area 14c, for example, the through hole 15c is a round hole or an elliptical hole. A quantity of the through holes 15c is at least one. <FIG> illustrates one through hole 15c, which is merely an example. There may be two or more through holes 15c according to product requirements and these through holes may be located at different positions and may be spaced apart from each other.

As shown in <FIG>, the through hole 15c may positionally correspond to the second transparent area 14c, and positionally corresponding means that at least a part of a projection of the through hole 15c on the cover plate <NUM> falls within the second transparent area 14c in the thickness direction of the cover plate <NUM>. Therefore, an external light ray can pass through the second transparent area 14c and enter the through hole 15c. For example, as shown in <FIG>, the through hole 15c may be aligned with the second transparent area 14c and axes of the through hole 15c and the second transparent area 14c may substantially coincide. A diameter of the through hole 15c may be greater than a diameter of the second transparent area 14c, that is, an inner boundary of the opaque area 14b may exceed a boundary of the through hole 15c, to block a partial area of the through hole 15c (the advantages of this design is described below). Alternatively, the through hole 15c may be aligned with the second transparent area 14c, axes of the through hole 15c and the second transparent area 14c may be substantially coincide, and diameters thereof may also be substantially identical. The through hole 15c is aligned with the optical module <NUM>, for an external light ray passing through the second transparent area 14c to pass through, so that the optical module <NUM> can receive the external light ray.

As shown in <FIG> and <FIG>, in the display panel <NUM>, an outer edge of the through hole 15c is a non-display area 15b, which surrounds the through hole 15c by one round. The shape of the non-display area 15b matches the shape of the through hole 15c. For example, the non-display area 15b may be approximately circular or elliptical. The non-display area 15b is an area in which a packaging groove 157a (that is, the first groove 157a, referred to as the packaging groove 157a in this embodiment of this application for the sake of readability, hereinafter the same), a barrier dam <NUM> (that is, the dam <NUM>, referred to as the barrier dam <NUM> in this embodiment of this application for the sake of readability, hereinafter the same), and a crack arrest groove 159a (that is, the second groove 159a, referred to as the crack arrest groove 159a in this embodiment of this application for the sake of readability, hereinafter the same) are located. The non-display area 15b has no pixels, cannot emit light, and does not display an image.

As shown in <FIG>, the non-display area 15b positionally corresponds the opaque area <NUM>, and positionally corresponding means that in the thickness direction of the cover plate <NUM>, at least a part of a projection of the non-display area 15b on the cover plate <NUM> falls within the opaque area 14b, and the at least part is blocked from being visible by the opaque area 14b. For example, the projection of the non-display area 15b in <FIG> may all fall into the opaque area 14b, so that all of the non-display area 15b is blocked by the opaque area 14b.

In <FIG>, an inner boundary of the opaque area 14b (the opaque area 14b is a closed ringlike area whose inner boundary is referred to as an inner boundary and whose outer boundary is referred to as an outer boundary; it can also be understood that a boundary close to the second transparent area 14c is an inner boundary and a boundary far away from the second transparent area 14c is referred to as an outer boundary; and the meanings of inner boundary and outer boundary mentioned below follow this definition) may exceed an inner boundary of the non-display area 15b (that is, exceeding a boundary of the through hole 15c), which can ensure the blocking effect of the opaque area 14b on the non-display area 15b, and avoid the situation that the non-display area 15b is not completely blocked and exposed out of the second transparent area 14c due to manufacturing errors or assembly errors. The outer boundary of the opaque area 14b in <FIG> may be substantially aligned with the outer boundary of the non-display area 15b, so that the opaque area 14b may be prevented from blocking the display area 15a. The positional design of the opaque area 14b and the non-display area 15b is merely an example and this embodiment of this application is not limited thereto. For example, the inner boundary of the opaque area 14b may be substantially aligned with the inner boundary of the non-display area 15b and the outer boundary of the opaque area 14b may exceed the outer boundary of the non-display area 15b.

As shown in <FIG> and <FIG>, in the display panel <NUM>, the other areas except the display area 15b and the through hole 15c may substantially be the display area 15a, which surrounds the outer circumference of the non-display area 15b. The display area 15a has pixels that can emit light. Light rays emitted by the display area 15a may be emitted from the first transparent area 14a, to form an image.

As shown in <FIG>, the display area 15a is located in the first transparent area 14a, that is, in the thickness direction of the cover plate <NUM>, a projection of the display area 15a on the cover plate <NUM> entirely falls within the first transparent area 14a, so that light rays from the entire display area 15a can be emitted from the first transparent area 14a. For example, the display area 15a in <FIG> may be substantially overlapped with the first transparent area 14a. Alternatively, at least a part of the boundary of the display area 15a may be retracted within the corresponding boundary of the first transparent area 14a according to product requirements.

In Embodiment <NUM>, when there are a plurality of the through holes 15c, there may also be a plurality of the second transparent areas 14c and one second transparent area 14c corresponds to one through hole 15c. Correspondingly, there may be a plurality of the opaque areas 14b and one opaque area 14b surrounds one second transparent area 14c. If adjacent second transparent areas 14c are close to each other, the opaque areas 14b corresponding to the second transparent areas 14c may be connected to form a large opaque area. Alternatively, the opaque areas 14b corresponding to the second transparent areas 14c may be spaced apart from each other. The first transparent area 14a surrounds an outer circumference of all the opaque areas 14b.

<FIG> illustrates a top view schematic structure of the display panel <NUM>. As shown in <FIG>, the display panel <NUM> may further include a flexible circuit board (flexible circuit board, FPC) assembly <NUM>. The flexible circuit board assembly <NUM> may include a flexible circuit board <NUM> and a device <NUM> and a connector <NUM> disposed on the flexible circuit board <NUM>. The flexible circuit board <NUM> may extend from an edge of the display area 15a of the display panel <NUM> and is electrically connected to a thin film transistor (thin film transistor, TFT) array layer <NUM> (which is described below) in the display panel <NUM>. The device <NUM> may be soldered to a surface of the flexible circuit board <NUM>, and the device <NUM> includes, but is not limited to, an integrated circuit (integrated circuit, IC). A connector <NUM> may be disposed at an end portion of the flexible circuit board <NUM> and configured to be connected to a circuit board of the electronic device <NUM>, to implement electrical connection between the display panel <NUM> and the circuit board.

The foregoing literal description of the display panel <NUM> describes an external macro structure of the display panel <NUM>. The following continuously describes an internal stacked structure of the display panel <NUM>.

The optical module <NUM> is configured to sense an external light ray, to generate an electrical signal. After being processed by the electronic device <NUM>, the electrical signal can be converted into target information. The optical module <NUM> includes, but is not limited to, at least one of a camera module, an infrared lens, a dot matrix projector, a distance sensor, an ambient light sensor, a proximity light sensor, or the like. The optical module <NUM> in <FIG> and <FIG> is a camera module, which is merely an example and is not a limitation to this embodiment of this application.

Referring to <FIG> and <FIG>, the optical module <NUM> may be mounted on the shell <NUM> and located between the cover plate <NUM> and the shell <NUM>. In an implementation, as shown in <FIG>, the optical module <NUM> may be entirely located between the display panel <NUM> and the shell <NUM>, that is, the optical module <NUM> may be entirely below the display panel <NUM> ("below" is based on the perspective in <FIG>), namely, the optical module <NUM> is entirely outside the through hole 15c. In another implementation, as shown in <FIG>, one part of the optical module <NUM> may be located inside the through hole 15c and the other part is located outside the through hole 15c. Alternatively, in other implementations, the optical module <NUM> may be entirely accommodated within the through hole 15c.

In this embodiment of this application, the optical module <NUM> may correspond to the through hole 15c, to acquire an external light ray entering the through hole 15c. In <FIG>, a dashed line passing through the second transparent area 14c, the through hole 15c, and the optical module <NUM> is used to represent a correspondence that the through hole 15c corresponds to the second transparent area 14c and the optical module <NUM> corresponds to the through hole 15c. For example, the optical module <NUM> is a camera module. That the optical module <NUM> corresponds to the through hole 15c may mean that an optical axis of the camera module coincides with an axis of the through hole 15c, or may mean that an optical axis of the optical module substantially coincides with an axis of the through hole 15c, and errors are allowed, as long as light rays can pass through the camera module to form an image. Certainly, the position relationship between the optical module <NUM> and the through hole 15c is not limited to the foregoing description. Optionally, the optical module <NUM> positionally corresponds to the through hole 15c, the positions of the optical module <NUM> and the through hole 15c can be near, and the optical module <NUM> is disposed inside the through hole, to ensure that the optical module <NUM> can acquire more light rays passing through the through hole 15c. The camera module may alternatively be disposed outside the through hole 15c, as long as it can be ensured that light rays pass through the camera module can form an image.

<FIG> illustrates an internal stacked structure of the display panel <NUM> in a sectional view. For the purpose of clarity of the drawings, not all the contours of the stacked layers in the area of the through hole 15c are displayed, hereinafter the same.

As shown in <FIG>, the display panel <NUM> may include a polarizer <NUM>, a touch layer <NUM>, a packaging layer <NUM>, and an organic functional layer <NUM> (that is, the organic layer <NUM>, referred to as the organic functional layer <NUM> in this embodiment of this application for the sake of readability, hereinafter the same), a TFT array layer <NUM>, a substrate <NUM>, a back film <NUM>, a vibration damping layer <NUM>, and a support layer <NUM>. The layers are successively stacked with the polarizer <NUM> facing toward the cover plate <NUM> and the support layer <NUM> facing away from the cover plate <NUM>. The through hole 15c runs through the layers. In the sectional view shown in <FIG>, portions located on two sides of the through hole 15c may be symmetrical.

The substrate <NUM> is a base material for forming a packaging layer <NUM> and an organic functional layer <NUM>. The substrate <NUM> may have flexibility, and is easy to bend. The substrate <NUM> may be formed by stacking a plurality of layers of materials. As shown in <FIG> and <FIG> illustrates an intercepted part of the display panel <NUM> and on the left side of the through hole 15c in <FIG>), the substrate <NUM> may include a first organic polymer material layer <NUM>, a first isolation layer <NUM>, a second organic polymer material layer <NUM>, a second isolation layer <NUM>, and a buffer layer <NUM> that are successively stacked. The first organic polymer material layer <NUM> faces away from the cover plate <NUM>, and the buffer layer <NUM> faces toward the cover plate <NUM>.

The first organic polymer material layer <NUM> and the second organic polymer material layer <NUM> may be made of, for example, an organic polymer material such as polyimide (Polyimide, PI). The first organic polymer material layer <NUM> and the second organic polymer material layer <NUM> have a high flexibility and are flexible base materials in the substrate <NUM>. The first isolation layer <NUM> and the second isolation layer <NUM> may be made of at least one of an inorganic material such as SiNx (silicon nitride), SiO2 (silicon dioxide), Si (silicon), SiNxO (silicon oxynitride), and Al2O3 (alumina). The first isolation layer <NUM> and the second isolation layer <NUM> have a water and oxygen isolation performance, and can prevent water and oxygen from invading the first organic polymer material layer <NUM>, the second organic polymer material layer <NUM>, and the organic functional layer <NUM>. The buffer layer <NUM> may be made of an inorganic material such as SiNx and/or SiO2. The buffer layer <NUM> can prevent impurity ions in the first organic polymer material layer <NUM> and the second organic polymer material layer <NUM> from entering the TFT array layer <NUM> and avoid affecting the performance of the TFT array layer <NUM>. The buffer layer <NUM> may further have a water and oxygen isolation performance, and can prevent water and oxygen from invading the organic functional layer <NUM>, the first organic polymer material layer <NUM>, and the second organic polymer material layer <NUM>.

The structure stacked by a plurality of layers of materials of the substrate <NUM> has both a good flexibility and a good isolating and cushioning performance. In other embodiments, the stacked structure and material selection of the substrate <NUM> may be designed according to requirements and are not limited to the foregoing description. For example, the first isolation layer <NUM> and the second isolation layer <NUM> may be replaced by a stainless steel sheet, ultra thin glass (ultra thin glass, UTG), polyethylene terephthalate (polyethylene terephthalate, PET), fiber, or the like, so that the substrate <NUM> having greater rigidity is manufactured.

As shown in <FIG>, the TFT array layer <NUM> is formed on the substrate <NUM>, and for example, may be formed on the buffer layer <NUM> in the substrate <NUM>. The TFT array layer <NUM> may be distributed in the display area 15a and the non-display area 15b, where the part distributed in the non-display area 15b may be located on an outer circumference of the through hole 15c (which is continuously described below). The TFT array layer <NUM> may include a TFT array made of a plurality of TFTs crisscrossed and is configured to control and drive the organic functional layer <NUM>. The TFT array layer <NUM> may further include an anode (an anode of an OLED device). The TFT array layer <NUM> is electrically connected to the flexible circuit board <NUM>. The improvement of this embodiment of this application does not lie in the TFT array layer <NUM> and therefore the specific structure of the TFT array layer <NUM> is not limited.

As shown in <FIG> and <FIG>, a barrier dam <NUM> may also be formed on the substrate <NUM>, for example, the barrier dam <NUM> may be formed on the buffer layer <NUM> in the substrate <NUM>. The barrier dam <NUM> and the TFT array layer <NUM> may be on the buffer layer <NUM> and may be spaced apart. The barrier dam <NUM> is in the non-display area 15b and may be located between the TFT array layer <NUM> and the through hole 15c. A cross-sectional shape of the barrier dam <NUM> may be, for example, trapezoidal. The height of the barrier dam <NUM> may be a few microns, such as <NUM>-<NUM> (including endpoint values). The barrier dam <NUM> is configured to block the organic packaging layer <NUM> described below.

In Embodiment <NUM>, the substrate <NUM> and the TFT array layer <NUM> and the barrier dam <NUM> on the substrate <NUM> may serve as the basic structure of the TFT backplane <NUM>, that is, the TFT backplane <NUM> includes the substrate <NUM> and the TFT array layer <NUM> and the barrier dam <NUM> on the substrate <NUM>.

<FIG> illustrates a position relationship of the TFT array layer <NUM>, the barrier dam <NUM>, and the through hole 15c on the buffer layer <NUM> from a perspective of a top view (that is, the perspective along the thickness direction of the display panel <NUM>), where only partial areas of the TFT array layer <NUM> and the buffer layer <NUM> are intercepted. For ease of distinction, the barrier dam <NUM> is represented by hatched lines. The TFT array layer <NUM> is represented by crisscrossed lines. As shown in <FIG>, the barrier dam <NUM> may be enclosed in a closed ringlike shape, for example, a circular shape. The barrier dam <NUM> surrounds the outer circumference of the through hole 15c. The barrier dam <NUM> is configured to block an organic material in the packaging layer <NUM>, which is described below.

The barrier dam <NUM> may be made of a single material or may be made of at least two layers of materials stacked. The material of the barrier dam <NUM> includes, but is not limited to, an organic material or an inorganic material. <FIG> illustrates only one barrier dam <NUM>, which is merely an example. More barrier dams <NUM>, for example, two barrier dams, may be disposed according to product requirements. Alternatively, the barrier dam <NUM> may not be disposed according to product requirements.

As shown in <FIG>, the substrate <NUM> may also be provided with a crack arrest groove 159a. For example, the crack arrest groove 159a may run through the buffer layer <NUM> and the second isolation layer <NUM> in the substrate <NUM>. In other embodiments, the crack arrest groove 159a may also run through only the buffer layer <NUM> in the substrate <NUM>.

As shown in <FIG> and <FIG>, the crack arrest groove 159a is located between the barrier dam <NUM> and the through hole 15c. The crack arrest groove 159a may be enclosed to form a closed ringlike shape, for example, a circular shape. The crack arrest groove 159a surrounds the outer circumference of the through hole 15c. The quantity of the crack arrest grooves 159a may be determined according to requirements, which is not limited to the quantity of three shown in <FIG>, and may also be, for example, one, two, or more than three. In addition, because the width of the crack arrest grooves 159a is small, the three crack arrest grooves 159a are represented by one circular area in <FIG> for the sake of clarity of the drawing.

In a case that the through hole 15c is provided in the display panel <NUM>, when the optical module <NUM> is assembled with the display screen <NUM> or when the cover plate <NUM> is laminated to the display panel <NUM>, stress concentration occurs in the vicinity of the through hole 15c, which may cause a crack in the display panel <NUM> and the crack may extend in a direction from the through hole 15c to the display area 15a. After the crack arrest groove 159a is provided, the stress in the display panel <NUM> is released when the crack extends to the crack arrest groove 159a, and the crack stops in the crack arrest groove 159a. Therefore, the crack arrest groove 159a has a function of blocking crack extension. Because the crack arrest groove 159a surrounds by one round, cracks from all directions can be blocked. The design of the crack arrest groove 159a can prevent damage to the display area 15a and to ensure reliability of the display area 15a.

In other embodiments, other structures having stress relief and crack arrest effects may be designed and are not limited to the crack arrest groove 159a described above. Alternatively, the crack arrest groove 159a may not be provided according to product requirements.

As shown in <FIG>, the organic functional layer <NUM> covers the substrate <NUM> (for example, covering the buffer layer <NUM>), the TFT array layer <NUM>, and the barrier dam <NUM>. The organic functional layer <NUM> may be distributed in the display area 15a and the non-display area 15b. The part located in the display area 15a may be referred to as a first organic layer and the part located in the non-display area 15b may be referred to as a second organic layer. The part of the organic functional layer <NUM> located in the display area 15a includes a plurality of display units. The display unit is a pixel. Each pixel may include a red sub-pixel R, a green sub-pixel G, and a blue sub-pixel B, and each pixel can emit a light ray to implement image display. The part of the organic functional layer <NUM> located in the non-display area 15b has no pixels and cannot emit light. As shown in <FIG> and <FIG>, the part of the organic functional layer <NUM> located in the non-display area 15b may be filled in the crack arrest groove 159a. In other embodiments, the organic functional layer <NUM> may not need to be filled in the crack arrest groove 159a.

Preferably, the organic functional layer <NUM> in Embodiment <NUM> may include a basic layer and a light-emitting layer. The basic layer is distributed in both the display area 15a and the non-display area 15b and the light-emitting layer is distributed only in the display area 15a.

<FIG> is a schematic diagram of a layered structure of a part of the organic functional layer <NUM> located in the display area 15a. As shown in <FIG>, the part of the organic functional layer <NUM> located in the display area 15a may include a cathode, an electron injection layer, an electron transport layer, a light-emitting layer, a hole transport layer, and a hole injection layer that are successively stacked, and the layers except the light-emitting layer all pertain to the basic layer. The hole injection layer may be oriented toward the TFT array layer <NUM> and the cathode layer may face away from the TFT array layer <NUM> (the TFT array layer <NUM> may include an anode of an OLED device to be mentioned below). Functions and material selection of the basic layer of the organic functional layer <NUM>, such as the cathode, the electron injection layer, the electron transport layer, the hole transport layer, and the hole injection layer, are common general knowledge in the art, which are not described in detail herein. The organic functional layer <NUM> may be prepared using an evaporation process.

In an implementation, the light-emitting layer may be made of an OLED light-emitting material, such as an organic small molecule light-emitting material, a complex light-emitting material, or a high molecular polymer. The light-emitting layer includes a plurality of red light portions R (capable of emitting red light), a plurality of green light portions G (capable of emitting green light), and a plurality of blue light portions B (capable of emitting blue light), and these light-emitting portions of different colors are arranged in an array. Each red light portion R may be referred to as a red sub-pixel R, each green light portion G may be referred to as a green sub-pixel G, and each blue light portion B may be referred to as a blue sub-pixel B. One red sub-pixel R, one green sub-pixel G, and one blue sub-pixel B may form one pixel, that is, the display unit described above. The part of the organic functional layer <NUM> in the display area 15a includes an OLED light-emitting layer and may be referred to as an OLED device. That is, the display panel <NUM> in this implementation may be an OLED display panel. The other part of the organic functional layer <NUM> in the non-display area 15b has only a basic layer and does not include a light-emitting layer, so that it does not display an image.

In another implementation, unlike the foregoing implementations, the light-emitting layer may be made of a quantum dot (quantum dot, QD) light-emitting material, that is the light-emitting layer is a QD light-emitting layer. A QD light-emitting material in QD light-emitting layer is grains with diameters between <NUM>-<NUM>. The grains with different diameters may emit red, green, and blue monochromatic light respectively under excitation of electric field, so as to form a red sub-pixel R, a green sub-pixel G, and a blue sub-pixel B, respectively. Correspondingly, the display panel <NUM> of this implementation may be referred to as an electroluminescent QLED display panel.

<FIG> is a schematic diagram of a layered structure of a part of the organic functional layer <NUM> located in the display area 15a according to another embodiment. As shown in <FIG>, the organic functional layer <NUM> in this embodiment may include a basic layer, a light-emitting layer a red QD layer, and a green QD layer. The basic layer is the same as stated above, description of which is not repeated. The difference is that the light-emitting layer may be made of a blue OLED material, and the light-emitting layer can only emit blue light, that is, the light-emitting layer may be used as a blue sub-pixel B. The red QD layer and the green QD layer cover the cathode, and the red QD layer and the green QD layer are distributed in spaced arrays. Both the red QD layer and the green QD layer are formed by a QD light-emitting material. The red QD layer can convert blue light of the light-emitting layer into red light, and the red QD layer forms a red sub-pixel R. The green QD layer can convert blue light of the light-emitting layer into green light, and the green QD layer forms a green sub-pixel G. The spacing between the red QD layer and the green QD layer allows blue light of the light-emitting layer to pass through, so that the light emitted from the red sub-pixel R, the green sub-pixel G, and the blue sub-pixel B may be mixed to form a pixel, that is, the display unit described above. The display panel <NUM> of this embodiment may be referred to as a photoluminescence QLED display panel. The other part of the organic functional layer <NUM> in the non-display area 15b may have only a basic layer and do not include a light-emitting layer, a red QD layer, or a green QD layer, so that it does not display an image.

As shown in <FIG> and <FIG>, the part of the organic functional layer <NUM> located in the non-display area 15b is provided with a packaging groove 157a. The packaging groove 157a runs through the organic functional layer <NUM> and is located between the barrier dam <NUM> and the crack arrest groove 159a. Certainly, the packaging groove 157a is also located between the barrier dam <NUM> and the through hole 15c. The cross-sectional shape of the packaging groove 157a (referring to the cross-sectional shape of the packaging groove 157a obtained by cutting the display panel <NUM> along a section A-A in <FIG>) may be approximately a "large above and small below" trapezoidal shape, that is, a width of the packaging groove 157a on a side away from the buffer layer <NUM> is greater than the width of the packaging groove 157a on a side close to the buffer layer <NUM>. Alternatively, the cross section of the packaging groove 157a may be another appropriate shape, for example, an approximate rectangle.

The width of the packaging groove 157a is <NUM>-<NUM>, such as <NUM>, <NUM>, <NUM>, or <NUM>.

The width of the packaging groove 157a on the side away from the buffer layer <NUM> is within the width range, and the width of the packaging groove 157a on the side close to the buffer layer <NUM> is also within the width range. Because the magnitude of width dimension is extremely small (at the µm level) and width data obtained by selecting any appropriate measurement datum is substantially consistent, the selection of measurement datum can be ignored. For example, a midline length of the trapezoidal cross section of the packaging groove 157a may be used as the width dimension. The depth of the packaging groove 157a may be, for example, <NUM>-<NUM>, such as <NUM>, <NUM>, or <NUM>. There may be at least one packaging groove 157a. <FIG> illustrates only one packaging groove 157a, which is merely an example and is not a limitation to this embodiment of this application. When there are two or more packaging grooves 157a, the packaging grooves 157a may be distributed on both inner and outer sides of the barrier dam <NUM>, that is, the packaging groove 157a is provided between the packaging groove 157a and the through hole 15c and on outer circumference of the packaging groove 157a.

<FIG> shows the relative position relationship of the barrier dam <NUM>, the packaging groove 157a, the crack arrest groove 159a, the through hole 15c, and the organic functional layer <NUM> from a perspective of a top view (that is, from the perspective in the thickness direction of the display panel <NUM>). For ease of distinction, the barrier dam <NUM> is represented by hatched lines and contours of the barrier dam <NUM> and the crack arrest groove 159a covered by the organic functional layer 157a are defined by dashed lines, respectively. As shown in <FIG>, the packaging groove 157a may be enclosed in a closed ringlike shape, for example, a circular shape. The packaging groove 157a surrounds an outer circumference of the crack arrest groove 159a and the through hole 15c. The packaging groove 157a is provided for the packaging layer <NUM> to be filled in, so as to prevent water and oxygen entering from the through hole 15c from invading the display area 15a. This is described in detail below.

In Embodiment <NUM>, the packaging groove 157a may be manufactured by laser etching the organic functional layer <NUM>. A basic principle of laser etching is to focus a low-power laser beam with high beam quality (for example, may be ultraviolet laser, fiber laser, or the like) into an extremely small light spot, and form an extremely high power density at the focus, so that a material of the organic functional layer <NUM> vaporizes and evaporates instantly, to form the packaging groove 157a. Laser etching has a small heat affected zone, can ablate the machining area quite accurately, has an extremely high machining accuracy and machining quality, and therefore can etch the packaging groove 157a having an extremely small width. Moreover, because the laser etching can focus into an extremely small light spot at a laser wavelength level, the organic functional layer <NUM> can be completely etched away, and even the buffer layer <NUM> below the organic functional layer <NUM> may be etched, which is beneficial to the filling of the packaging layer <NUM> (which is continuously described below). In addition, the laser etching is suitable for processing a flexible material without contact with and contamination of the organic functional layer <NUM>.

As shown in <FIG> and <FIG>, the packaging layer <NUM> covers the organic functional layer <NUM> and is distributed in the display area 15a and the non-display area 15b. The packaging layer <NUM> may include a first inorganic packaging layer <NUM>, an organic packaging layer <NUM>, and a second inorganic packaging layer <NUM>.

The first inorganic packaging layer <NUM> covers the entire area of the organic functional layer <NUM> and is filled in the packaging groove 157a to partition the organic functional layer <NUM>. The part of the first inorganic packaging layer <NUM> filled in the packaging groove 157a may be in contact with the buffer layer <NUM>. The thickness of the first inorganic packaging layer <NUM> may be <NUM>-<NUM>, such as <NUM>, <NUM>, or <NUM>. It can be seen that the thickness of the first inorganic packaging layer <NUM> is greater than the depth (<NUM>-<NUM>) of the packaging groove 157a and the packaging groove 157a can be filled up with the first inorganic packaging layer <NUM>. The first inorganic packaging layer <NUM> may be made of an inorganic material, such as SiNx and/or SiO2. Due to the properties of the inorganic material, the first inorganic packaging layer <NUM> has a good water and oxygen permeability resistance performance, and can block water and oxygen (for example, the water and oxygen entering from the through hole 15c) at the packaging groove 157a, so that the water and oxygen cannot cross the packaging groove 157a to invade the display area 15a along the organic functional layer <NUM>. The first inorganic packaging layer <NUM> may be prepared using a low temperature chemical vapor deposition (chemical vapor deposition, CVD) process or an atomic layer deposition (atomic layer deposition, ALD) process. The trapezoidal cross-sectional shape of the packaging groove 157a facilitates sufficient deposition of the inorganic material inside the packaging groove 157a. In other embodiments, the thickness, material, and molding process of the first inorganic packaging layer <NUM> may be determined according to requirements and are not limited to the foregoing description.

The organic packaging layer <NUM> covers the first inorganic packaging layer <NUM> and is distributed within a barrier dam <NUM>, which serves as a boundary of the first inorganic packaging layer <NUM>. The thickness of the organic packaging layer <NUM> may be <NUM>-<NUM>, such as <NUM>, <NUM>, or <NUM>. The organic packaging layer <NUM> may be made of an organic material such as an epoxy resin type organic material and polymethyl methacrylate. The organic material may be printed onto the first inorganic packaging layer <NUM> through an ink jet printing process, and the organic material is cured to form the organic packaging layer <NUM>. The organic material has fluidity before curing, and the barrier dam <NUM> can block it. With the fluidity of the organic material, the organic packaging layer <NUM> can be made to form a level surface, which facilitates subsequent formation of the second inorganic packaging layer <NUM>. Moreover, the organic packaging layer <NUM> has a good flexibility, and the first inorganic packaging layer <NUM> and the second inorganic packaging layer <NUM> have a poor flexibility. The organic packaging layer <NUM> isolates the first inorganic packaging layer <NUM> from the second inorganic packaging layer <NUM>. Such the "sandwich" structure can ensure that the packaging layer <NUM> has a good flexibility as a whole to meet bending requirements. In other embodiments, the thickness, material, and molding process of the organic packaging layer <NUM> may be determined according to requirements and are not limited to the foregoing description. For example, the organic packaging layer <NUM> may be prepared by a one drop fill (one drop fill, ODF) process.

The second inorganic packaging layer <NUM> covers the first inorganic packaging layer <NUM> and the organic packaging layer <NUM>. The thickness of the second inorganic packaging layer <NUM> may be <NUM>-<NUM>, such as <NUM>, <NUM>, or <NUM>. The second inorganic packaging layer <NUM> may be made of an inorganic material, such as SiNx and/or SiO2. The second inorganic packaging layer <NUM> similarly has a good water and oxygen permeability resistance performance, and can block water and oxygen (for example, the water and oxygen entering from the through hole 15c, or the water and oxygen entering from a side of the second inorganic packaging layer <NUM> facing away from the first inorganic packaging layer <NUM>), so as to prevent the water and oxygen from invading the organic packaging layer <NUM> and the display area 15a. Therefore, by using the second inorganic packaging layer <NUM>, the water and oxygen barrier performance can be further improved. The second inorganic packaging layer <NUM> may be prepared using a low temperature CVD process or an ALD process. In other embodiments, the thickness, material, and molding process of the second inorganic packaging layer <NUM> may be determined according to requirements and are not limited to the foregoing description.

The packaging layer <NUM> in Embodiment <NUM> is a "sandwich" configuration including the first inorganic packaging layer <NUM>, the organic packaging layer <NUM>, and the second inorganic packaging layer <NUM>, which is merely an example. In other embodiments, the packaging layer <NUM> may be alternately stacked by a plurality of layers of inorganic material-organic material, and for example, the packaging layer <NUM> may include seven or five layers of materials. Alternatively, according to requirements, other processes may be employed to prepare the packaging layer <NUM>, which may have only one or two layers of materials, and the barrier dam <NUM> may not be disposed.

In Embodiment <NUM>, the packaging groove 157a is provided in the part of the organic functional layer <NUM> and located in the non-display area, and the packaging layer <NUM> is filled in the packaging groove 157a, to partition the organic functional layer <NUM>, so that external water and oxygen entering from the through hole 15c can be blocked at the packaging groove 157a, and the external water and oxygen can be prevented from invading the display area 15a along the organic functional layer <NUM>. Because the structure of the packaging groove 157a is simple and easy to process, the manufacturing cost is low.

Moreover, an appropriate processing process (for example, laser etching) may be adopted to ensure that the width of the packaging groove 157a is small, so that the non-display area 15b can have a small width (referring to <FIG> and <FIG>), and therefore the opaque area 14b in the cover plate <NUM> can also be made narrow, thereby being beneficial to increase of the screen ratio of the electronic device <NUM>.

<FIG> is a schematic illustration of a conventional flexible display panel partitioning the organic functional layer <NUM> by using an isolation column <NUM>. What is intercepted is a layered structure of the non-display area and located on the outer circumference of the through hole 15c. As shown in <FIG>, the isolation column <NUM> may be formed on the TFT array layer <NUM>. The isolation column <NUM> may include a lower isolation layer <NUM>, a middle isolation layer <NUM>, and an upper isolation layer <NUM> that are successively stacked. The width of the lower isolation layer <NUM> and the width of the upper isolation layer <NUM> (the dimensions in the left-right direction in <FIG>) are greater than the width of the middle isolation layer <NUM>. Such the structure may be referred to as an undercut structure (undercut). When the organic functional layer <NUM> is formed through an evaporation process, an evaporated material is deposited on a surface of the isolation column <NUM>. Because deposition of evaporated materials is oriented (particles move substantially in a straight line) and there is the undercut structure, the finally manufactured organic functional layer <NUM> may cover the upper isolation layer <NUM>, the TFT array layer <NUM>, and the substrate <NUM>, and may also cover part of the lower isolation layer <NUM> and part of the middle isolation layer <NUM>. However, the part of the organic functional layer <NUM> covering the upper isolation layer <NUM> is cut off from the rest of the organic functional layer <NUM> at the isolation column <NUM>. The first inorganic packaging layer <NUM> covers the organic functional layer <NUM> and is filled in a space at the isolation column <NUM> to partition the organic functional layer <NUM>. When the external water and oxygen invades the organic functional layer <NUM> from the side of the through hole 15c, since the organic functional layer <NUM> is cut off at the isolation column <NUM>, the external water and oxygen cannot continuously cross the isolation column <NUM> for invading, thereby playing a role of blocking the water and oxygen.

As can be seen from <FIG> and the foregoing description, the structure of the isolation column <NUM> is relatively complex, which leads to a complicated manufacturing process of the isolation column <NUM> and a high manufacturing cost of the conventional flexible display panel.

Moreover, due to the limitation of process accuracy, the organic functional layer <NUM> cannot be completely cut off by a single isolation column <NUM>, resulting in poor water and oxygen packaging effect. In order to make up for this defect, it is usually necessary to provide a plurality of isolation columns <NUM> (for example, <NUM>), and the total width of the plurality of isolation columns <NUM> can reach <NUM>, which in turn leads to an increase in the width of the non-display area, resulting in decrease in the screen ratio. To sum up, the solution of Embodiment <NUM> can implement packaging of the area close to the through hole 15c of the display panel <NUM> with a simple structure, and can reduce the packaging width and increase the screen ratio of the electronic device.

As shown in <FIG> and <FIG>, the touch layer <NUM> may be located on the side of the packaging layer <NUM> away from the organic functional layer <NUM>, for example, the touch layer <NUM> may be laminated to the packaging layer <NUM> through an adhesive layer C2. In other embodiments, the touch layer <NUM> may be integrated with the packaging layer <NUM>, that is, the touch layer <NUM> is formed together in the manufacturing process of the display panel <NUM>, instead of laminating an independent touch layer <NUM> to the packaging layer <NUM>. The touch layer <NUM> may include touch units arranged in an array and configured to implement a touch operation of the display panel <NUM>.

As shown in <FIG> and <FIG>, the polarizer <NUM> may be located in the side of the touch layer <NUM> facing away from the packaging layer <NUM>. The polarizer <NUM> may be laminated to the cover plate <NUM> through the adhesive layer C1. A through hole aligned with the through hole 15c may be formed in the adhesive layer C1, so that an external light ray can conveniently enter the through hole 15c. Alternatively, the adhesive layer C1 may be an adhesive having a good light transmittance. In this case, an external light ray may still enter the through hole 15c without providing a through hole in the adhesive layer C1.

As shown in <FIG> and <FIG>, the back film <NUM> may be laminated to a side of the substrate <NUM> facing away from the organic functional layer <NUM>. For example, the back film <NUM> may be laminated to the first organic polymer material layer <NUM> through an adhesive layer C3. The back film <NUM> is a protective layer on a back side of the display panel <NUM>. The back film <NUM> may be made of, for example, a polyimide material or a PET material, or may also be made of other appropriate materials.

As shown in <FIG> and <FIG>, the vibration damping layer <NUM> is located in a side of the back film <NUM> facing away from the substrate <NUM>, and the vibration damping layer <NUM> can be laminated to the back film <NUM> through an adhesive layer C4. The vibration damping layer <NUM> may be made of, for example, a foam material or another material capable of damping and absorbing vibration. The vibration damping layer <NUM> has a buffering and vibration absorbing effect and can improve the impact resistance performance of the display panel <NUM>.

As shown in <FIG> and <FIG>, the support layer <NUM> is located in the side of the vibration damping layer <NUM> facing away from the back film <NUM>, and the support layer <NUM> can be laminated to the vibration damping layer <NUM> through an adhesive layer C5. The support layer <NUM> may be, for example, a metal layer such as a copper foil or a steel sheet (such as SUS stainless steel). The support layer <NUM> may have performance of mechanical protection, heat dissipation, electromagnetic interference resistance, or the like.

In addition, in consideration of the heat dissipation of the display panel <NUM>, a graphite material may be mixed in the vibration damping layer <NUM>, a graphite sheet is laminated to the support layer <NUM>, or a graphite sheet is directly used instead of the support layer <NUM>. Certainly, the design of using graphite for heat dissipation is not necessary.

The foregoing embodiments explain in detail the structure of the display panel <NUM> in this embodiment of this application and the following describes the method for manufacturing the display panel <NUM>. The following components with the same name as above have the same structure as above and will not be repeated hereinafter. Embodiment <NUM> provides a method for manufacturing a display panel, which is used for manufacturing the display panel <NUM>. The manufacturing method may include the following steps.

S32: Form an organic functional layer on the TFT backplane, where the organic functional layer includes a first organic layer and a second organic layer, the first organic layer is disposed around the second organic layer, the first organic layer includes a plurality of display units, the first organic layer serves as a display area of the display panel, the second organic layer does not include a display unit, and the second organic layer serves as a non-display area of the display panel.

S33: Provide a packaging groove around the second organic layer by one round, so that the packaging groove runs through the second organic layer.

S34: Form a packaging layer on the organic functional layer, so that the packaging layer covers the first organic layer and the second organic layer and is filled in the packaging groove.

S35: Form a touch layer and a polarizing layer on the packaging layer, so that the touch layer is located between the packaging layer and the polarizing layer, to prepare a prefabricated panel.

S36: Provide a through hole on the prefabricated panel, so that the through hole is located on an inner circumference of the packaging groove.

The TFT backplane prepared in S31 is the TFT backplane <NUM>, and the TFT backplane <NUM> may be a flexible TFT backplane or a rigid TFT backplane. The following describes the in detail by using an example in which the TFT backplane <NUM> is a flexible TFT backplane with reference to <FIG> adopts a partial cross-sectional representation of <FIG>) and <FIG>.

As shown in <FIG> and <FIG>, in an implementation, step S31 may specifically include the following steps.

S311: Provide a rigid carrier plate <NUM>. The rigid carrier plate <NUM> is a flat substrate and may be made of glass. The rigid carrier plate <NUM> has a relatively great rigidity, and can be used as a carrier to support a soft organic polymer material in the next step, so as to ensure that the size and flatness of the organic polymer material layer meet design requirements.

S312: Form at least two layers of organic polymer materials and at least two layers of inorganic materials on the rigid carrier plate <NUM>, so that the at least two layers of organic polymer materials and the two layers of inorganic materials are alternately stacked, where one layer of the organic polymer material is directly laminated to the rigid carrier plate <NUM>. For example, two layers of organic polymer material and two layers of inorganic material may be formed, the two layers of organic polymer material and the two layers of inorganic material are successively stacked in an order of organic polymer material-inorganic material-organic polymer material-inorganic material, and one layer of organic polymer material is tightly laminated to the rigid carrier plate <NUM>. The organic polymer material includes, but is not limited to, PI and the like, and the organic polymer material forms an organic polymer material layer. The inorganic material includes, but is not limited to, at least one of SiNx, SiO2, Si, SiNxO, Al2O3, and forms an inorganic material layer. A first organic polymer material layer <NUM>, a first isolation layer <NUM>, a second organic polymer material layer <NUM>, and a second isolation layer <NUM> are formed successively along a stacking direction of the materials.

S313: Cover an inorganic material such as SiNx and/or SiO2 on the formed second isolation layer <NUM>, to form a buffer layer <NUM>. According to product requirements, step S313 may not be present in other embodiments.

S314: Form a TFT array layer <NUM> on the buffer layer <NUM>. For example, the TFT array layer <NUM> may be formed through an array process. The TFT array layer <NUM> is formed only in a partial area of the buffer layer <NUM>. In other embodiments where no buffer layer <NUM> is formed, the TFT array layer <NUM> may be formed on the second isolation layer <NUM>.

S315: Provide a crack arrest groove 159a in the TFT backplane <NUM> and surrounding the same by one round, so that the crack arrest groove 159a runs through only the buffer layer <NUM> and the second isolation layer <NUM>, that is, the crack arrest groove 159a does not run through the flexible TFT backplane <NUM>. For example, the buffer layer <NUM> and the second isolation layer <NUM> may be etched through an etching process, to form the crack arrest groove 159a. In other embodiments, the crack arrest groove 159a may also run through only the buffer layer <NUM>. Alternatively, in embodiments where no buffer layer <NUM> is formed, the crack arrest groove 159a may run through only the second isolation layer <NUM>.

In S315, at least one crack arrest groove 159a may be provided with, for example, the three crack arrest grooves 159a shown in <FIG>, which are nested successively. According to product requirements, the crack arrest groove 159a may not be provided in other embodiments. In Embodiment <NUM>, the sequence of step S315 and step S314 is not limited and may be determined according to product requirements.

S316: Form a barrier dam <NUM> around the buffer layer <NUM> by one round. There may be at least one barrier dam <NUM>. <FIG> illustrates one barrier dam <NUM>, and the quantity thereof may alternatively be two. The height of the barrier dam <NUM> may be <NUM>-<NUM> (including endpoint values). The barrier dam <NUM> may be made of a single material or may be formed by stacking at least two layers of materials. The barrier dam <NUM> is configured to block an organic material in the packaging layer <NUM> formed in a subsequent step. In other embodiments, when the step of forming a buffer layer <NUM> is not included, step S316 may be forming a barrier dam <NUM> on the second isolation layer <NUM>. Alternatively, in other embodiments, the step of forming a barrier dam <NUM> may not be included.

In Embodiment <NUM>, the sequence of step S316, step S315, and step S314 is not limited and may be determined according to product requirements. The formed barrier dam <NUM> surrounds the outer circumference of the formed crack arrest groove 159a and the formed TFT array layer <NUM> is located on the outer circumference of the barrier dam <NUM>.

As shown in <FIG> and <FIG>, the organic functional layer <NUM> formed in step S32 may cover the buffer layer <NUM>, the TFT array layer <NUM>, and the barrier dam <NUM>. In step S32, for example, a plurality of layers of organic materials may be successively covered on the TFT backplane <NUM>, to successively prepare a hole injection layer, a hole transport layer, a cathode, a light-emitting layer, an electron transport layer, and an electron injection layer, so as to manufacture the organic functional layer <NUM>. The light-emitting layer may be distributed only on the outer circumference of the barrier dam <NUM>, and the hole injection layer, the hole transport layer, the cathode, the electron transport layer, and the electron injection layer cover the entire TFT backplane <NUM> (including the barrier dam <NUM> and the crack arrest groove 159a). The light-emitting layer may be formed by using an OLED light-emitting material or a QD light-emitting material. Therefore, the area of the organic functional layer <NUM> having the light-emitting layer may be referred to as the first organic layer, which forms the display area 15a; and the area of the organic functional layer <NUM> not having a light-emitting layer may be referred to as a second organic layer, which forms the non-display area 15b.

In step S32 the organic functional layer <NUM> may be formed through an evaporation process, a printing process, or a coating process (coating).

As shown in <FIG> and <FIG>, in step S33, the non-display area 15b of the organic functional layer <NUM> may be provided with a packaging groove 157a surrounding by one round by laser etching. A basic process of laser etching is to focus a low-power laser beam with high beam quality (for example, may be ultraviolet laser, fiber laser, or the like) into an extremely small light spot, and form an extremely high power density at the focus, so that a material of the non-display area 15b of the organic functional layer <NUM> vaporizes and evaporates instantly, to form the packaging groove 157a. Laser etching has a small heat affected zone, can ablate the machining area quite accurately, has an extremely high machining accuracy and machining quality, and therefore can etch the packaging groove 157a having an extremely small width. The packaging groove 157a having a width between <NUM> and <NUM> is obtained by etching. As stated above, the width of the packaging groove 157a on the side away from the substrate <NUM> is within the width range, and the width of the packaging groove 157a on the side close to the substrate <NUM> is also within the width range. Moreover, because the laser etching can focus into an extremely small light spot at a laser wavelength level, the organic functional layer <NUM> can be completely etched away, and even the buffer layer <NUM> below the organic functional layer <NUM> may be partially or completely etched away, which is beneficial to the filling of the packaging layer <NUM> in step S34. In addition, the laser etching is suitable for processing a flexible material without contact with and contamination of the organic functional layer <NUM>.

In step S33 of other embodiments, the packaging groove 157a may also be formed in other ways such as plasma beam dry etching or ion beam dry etching.

As shown in <FIG>, the packaging groove 157a formed in step S33 and may have an approximately trapezoidal cross-sectional shape. The width of the packaging groove 157a on the side away from the substrate <NUM> is greater than the width of the packaging groove 157a on the side close to the substrate <NUM>. The trapezoidal packaging groove 157a is beneficial to sufficient filling of the packaging layer <NUM> in step S34.

As shown in <FIG>, in step S33, the packaging groove 157a may be provided to surround the outer circumference of the crack arrest groove 159a and be located between the barrier dam <NUM> and the crack arrest groove 159a. The packaging groove 157a may be provided at both the outer circumference and the inner circumference of the barrier dam <NUM>.

As shown in <FIG>, step S34 may specifically include the following steps.

S341: As shown in <FIG>, a first inorganic packaging layer <NUM> is formed on the organic functional layer <NUM>, so that the first inorganic packaging layer <NUM> covers the display area 15a and the non-display area 15b of the organic functional layer <NUM> and is filled in the packaging groove 157a. The first inorganic packaging layer <NUM> covers the entire area of the organic functional layer <NUM> and is filled in the packaging groove 157a to partition the organic functional layer <NUM>. The part of the first inorganic packaging layer <NUM> filled in the packaging groove 157a may be in contact with the buffer layer <NUM>. For example, the first inorganic packaging layer <NUM> may be manufactured by depositing an inorganic material of SiNx and/or SiO2 on the organic functional layer <NUM> through a low temperature CVD process or an ALD process. The foregoing process is suitable for deposition of an inorganic material, with a good yield and a high process reliability.

S342: As shown in <FIG>, an organic packaging layer <NUM> is formed on the first inorganic packaging layer <NUM>, so that the organic packaging layer <NUM> covers a part of the first inorganic packaging layer <NUM> located on the outer circumference of the barrier dam <NUM>. For example, an organic material such as an epoxy resin or a polymethyl methacrylate may be printed onto the first inorganic packaging layer <NUM> through an ink jet printing process. The organic material has fluidity, and the barrier dam <NUM> can block the organic material, so as to cover the area of the first inorganic packaging layer <NUM> located in the outer circumference of the barrier dam <NUM>. After covering is complete, the organic material may be cured, to obtain the organic packaging layer <NUM>. The ink jet printing process is suitable for deposition of an organic material, with a good yield and a high process reliability. The organic packaging layer <NUM> may also be formed by another process, for example, an ODF process.

S343: As shown in <FIG>, a second inorganic packaging layer <NUM> is formed on the organic packaging layer <NUM> and the first inorganic packaging layer <NUM>. For example, the second inorganic packaging layer <NUM> may be manufactured by depositing an inorganic material of SiNx and/or SiO2 on the organic packaging layer <NUM> and the first inorganic packaging layer <NUM> through a low temperature CVD process or an ALD process. The foregoing process is suitable for deposition of an inorganic material, with a good yield and a high process reliability.

The packaging layer <NUM> may be manufactured through step S341 to step S343. The packaging layer <NUM> manufactured by the process has a good flexibility and water and oxygen barrier performance.

As shown in <FIG>, after the packaging layer <NUM> is manufactured in step S34, the rigid carrier plate <NUM> may be lifted off to facilitate subsequent continuation of the manufacturing process. For example, the rigid carrier plate <NUM> may be separated from the first organic polymer material layer <NUM> through a laser lift off (laser lift off, LLO) process. After the rigid carrier plate <NUM> is lifted off, a back film <NUM> may be attached to a surface of the first organic polymer material layer <NUM> facing away from the first isolation layer <NUM>, and the back film <NUM> may be laminated to the first organic polymer material layer <NUM> through an adhesive layer C3.

As shown in <FIG>, after lifting off the rigid carrier plate <NUM>, in step S35, a touch layer <NUM> and a polarizing layer <NUM> may be formed on the packaging layer <NUM>. The polarizing layer <NUM> is the polarizer <NUM>. For example, the touch layer <NUM> may be laminated to the packaging layer <NUM> through an adhesive layer C2 and the polarizing layer <NUM> covers the touch layer <NUM>. The polarizing layer <NUM> and the touch layer <NUM> may be integrated without being bonded by a medium. In this case, an integrated film layer of the polarizing layer <NUM> and the touch layer <NUM> may be laminated to the packaging layer <NUM>. Alternatively, the polarizing layer <NUM> and the touch layer <NUM> may be independent films, and the touch layer <NUM> may be first laminated to the packaging layer <NUM>, and then the polarizing layer <NUM> may be laminated to the touch layer <NUM>. Alternatively, the touch layer <NUM> may be integrated with the packaging layer <NUM>, that is, the touch layer <NUM> may be formed together in the manufacturing process of the display panel <NUM>. In this case, only a separate polarizing layer <NUM> (or the polarizer <NUM>) needs to be laminated to the touch layer <NUM>.

Alternatively, in step S35 of other embodiments, after the touch layer <NUM> is formed in any of the above methods, the polarizing layer <NUM> may be formed on the touch layer <NUM> through a coating process (coating), and the polarizing layer <NUM> is integrated with the touch layer <NUM>. Such the polarizing layer <NUM> may be referred to as a coated polarizer. The coating process can be used to prepare a relatively thin coated polarizer, which is beneficial to thinning of the display panel <NUM>.

In other embodiments, when the coated polarizer is prepared through the coating (coating) process in step S35, step S35 may be performed first to manufacture the coated polarizer, and then the steps of lifting off the rigid carrier plate <NUM> and the attaching the back film <NUM> are performed. Alternatively, in other embodiments, when the TFT backplane <NUM> to be formed is a rigid backplane, the rigid carrier plate <NUM> may not be used and naturally the step of lifting off the rigid carrier plate <NUM> is not included.

As shown in <FIG>, after the foregoing steps, a prefabricated panel <NUM>' may be manufactured. In a next step, the prefabricated panel <NUM>' is further processed.

As shown in <FIG>, in step S36, a through hole 15c is provided in the prefabricated panel <NUM>', and the through hole 15c is located on an inner circumference of the packaging groove 157a, for example, on the inner circumference of the crack arrest groove 159a. In step S36, the through hole 15c, the crack arrest groove 159a, and the packaging groove 157a are kept at an appropriate distance. An aperture of the through hole 15c is adapted to a size of the optical module <NUM>. The through hole 15c may be provided in any suitable manner. As shown in <FIG>, the vibration damping layer <NUM> and the support layer <NUM> may also be attached to a back portion of the prefabricated panel <NUM>' after the through hole 15c is provided. For example, the vibration damping layer <NUM> may be attached to a surface of the back film <NUM> facing away from the substrate <NUM> through an adhesive layer C4, and the support layer <NUM> is attached to the vibration damping layer <NUM> through an adhesive layer C5. The vibration damping layer <NUM> may be made of a material having a cushioning and vibration absorbing performance, for example, foam. The support layer <NUM> may be made of copper foil, steel sheet (such as SUS stainless steel), or the like.

In other embodiments, the rigid carrier plate <NUM> may be lifted off after the through hole 15c is provided and then the vibration damping layer <NUM> and the support layer <NUM> are attached.

As shown in <FIG>, the display panel <NUM> and the cover plate <NUM> manufactured by the foregoing manufacturing method may be laminated by an adhesive layer C1 to obtain the display screen <NUM>. The cover plate <NUM> may include a first transparent area 14a, an opaque area 14b, and a second transparent area 14c. The opaque area 14b of the cover plate <NUM> is provided with light-shielding ink 14d. The through hole 15c of the display panel <NUM> may positionally correspond to the second transparent area 14c of the cover plate <NUM>, the non-display area 15b of the display panel <NUM> may positionally correspond to the opaque area 14b, and the display area 15a of the display panel <NUM> may positionally correspond to the first transparent area 14a,
or a bare cover plate may be used to be laminated to the display panel <NUM>. The bare cover plate is not coated with the light-shielding ink 14d, the entire area of the bare cover plate is transparent, and there is no opaque area 14b. Before laminating, the light-shielding ink 14d may be applied to a set area on the bare cover plate in advance, to divide the bare cover plate into a first transparent area 14a, an opaque area 14b, and a second transparent area 14c, where the opaque area 14b is an area on which the light-shielding ink 14d is applied. The bare cover plate coated with the light-shielding ink 14d is then laminated to the display panel <NUM>. By comparing the above two processes, it can be seen that the former is to directly laminate the cover plate <NUM> having the opaque area 14b to the display panel <NUM>; and in the latter case, the bare cover plate without an opaque area 14b is pre-processed, to form the opaque area 14b, and then laminated to the display panel <NUM>.

In other embodiments, the bare cover plate which is transparent in the entire area can be directly configured to be laminated to the display panel <NUM>, so that there is no problem of aligning the second transparent area 14c with the through hole 15c, and the process difficulty can be reduced. Moreover, the non-display area 15b in the manufactured display screen <NUM> is not shield, and therefore can be observed by a user, which can produce a unique appearance experience.

Claim 1:
A display panel (<NUM>), wherein
the display panel (<NUM>) comprises a thin film transistor backplane (<NUM>), an organic layer (<NUM>), and a packaging layer (<NUM>) that are successively stacked; the display panel (<NUM>)is provided with a through hole, which runs through the thin film transistor backplane (<NUM>), the organic layer (<NUM>), and the packaging layer (<NUM>); the display panel (<NUM>)comprises a non-display area and a display area, the non-display area being disposed around the through hole and the display area being disposed around the non-display area;
the organic layer (<NUM>) comprises a first organic layer and a second organic layer, the first organic layer is a part located in the display area, and the second organic layer is a part located in the non-display area, wherein the first organic layer comprises a plurality of display units, the second organic layer is provided with a first groove (157a), which runs through the second organic layer and exposes an upper surface of the thin film transistor backplane free from the second organic layer, and the first groove (157a) is disposed around the through hole; and
the packaging layer (<NUM>) covers the organic layer (<NUM>) and is filled in the first groove (157a);
characterized in that
the width of the first groove (157a) on the side close to the thin film transistor backplane is <NUM>-<NUM> and the width of the first groove (157a) on the side away from the thin film transistor backplane is <NUM>-<NUM>.