Display panel and electronic equipment

Abstract

The invention relates to a display panel and electronic equipment. The display panel comprises a light-emitting layer, a micron lens array layer and a third transparent optical coating which are sequentially arranged in a stacked mode in the first direction. The light-emitting layer comprises a plurality of sub-pixels and a pixel defining layer connected among the plurality of sub-pixels; the micron lens array layer comprises a first transparent optical coating and a plurality of second transparent optical coatings, the first transparent optical coating is connected among the plurality of second transparent optical coatings, and the refractive index of each second transparent optical coating is greater than that of the first transparent optical coating; a first interface is formed between the first transparent optical coating and the second transparent optical coating, a second interface is formed between the first transparent optical coating and the third transparent optical coating, and the reflectivity of the first interface is larger than that of the second interface. The part, attached to the second transparent optical coating, of the first transparent optical coating is located on the side, facing the light-emitting layer, of the first interface. The problem that the light source is too dark can be solved.

Description

Technical Field

[0001] The present application relates to the field of display technology, and in particular to a display panel and an electronic device. Background Art

[0002] Electronic devices are widely used, and users have higher and higher requirements for electronic devices. However, the electronic devices in the related technology cannot guarantee the performance of ambient light sensors, which may lead to a high rejection rate of fingerprint recognition. Moreover, when using a mobile phone under strong light sources or outdoor scenes, the reflectivity of the mobile phone display is high and the display image is not clear. It is necessary to increase the brightness of the display, which increases the power consumption of the mobile phone. Summary of the invention

[0003] Embodiments of the present application provide a display panel and an electronic device to solve the problem of high reflectivity and low fingerprint recognition rate of the display panel of the electronic device.

[0004] In a first aspect, the present application provides a display panel, comprising a light-emitting layer, a micron lens array layer and a third transparent optical coating layer which are stacked in sequence, and the stacking direction of the three is a first direction; the light-emitting layer comprises a plurality of sub-pixels and a pixel defining layer connected between the plurality of the sub-pixels; the micron lens array layer comprises a first transparent optical coating layer and a plurality of second transparent optical coating layers, the first transparent optical coating layer is connected between the plurality of the second transparent optical coating layers, the refractive index of each of the second transparent optical coating layers is greater than the refractive index of the first transparent optical coating layer, the first transparent optical coating layer and the pixel defining layer are arranged correspondingly in the first direction, and the plurality of the second transparent optical coating layers and the plurality of the sub-pixels are arranged one-to-one in the first direction; the third transparent optical coating layer is attached to the surface of the first transparent optical coating layer and the surfaces of the plurality of the second transparent optical coating layers; the first transparent optical coating layer comprises a first edge portion, the first edge portion is attached to the second transparent optical coating layer to form a first interface, a second interface is formed between the first transparent optical coating layer and the third transparent optical coating layer, the reflectivity of the first interface is greater than the reflectivity of the second interface, and the first edge portion is located on the side of the first interface facing the light-emitting layer.

[0005] In this embodiment, since the plurality of second transparent optical coatings are arranged at intervals, the first transparent optical coating is located between the plurality of second transparent optical coatings, and the third transparent optical coating is attached to the surface of the first transparent optical coating and the surfaces of the plurality of second transparent optical coatings, at least part of the surface of the first transparent optical coating is not attached to the second transparent optical coating. Compared with the solution in which the second transparent optical coating is completely attached to the outer surface of the first transparent optical coating, in this embodiment, the number of the first transparent optical coating and the second transparent optical coating is reduced, the number of the third transparent optical coating and the second transparent optical coating is reduced, and the refractive index of each second transparent optical coating is greater than the refractive index of the first transparent optical coating and the refractive index of the third transparent optical coating, thereby reducing the high-reflection interface formed by the first transparent optical coating and the second transparent optical coating, the third transparent optical coating and the second transparent optical coating, so that the reflectivity of the display panel in this embodiment can be reduced as a whole, and then the transmittance of the display panel in this embodiment can be improved, so that more light entering from the outside can pass through the display panel to reach the corresponding light sensor, such as the fingerprint recognition sensor, thereby improving the fingerprint recognition rate. In addition, the second transparent optical coating with a high refractive index can change the propagation path of light emitted from the self-luminous layer, extract a portion of the side wall light, enhance the front light, reduce the power consumption of the OLED display, save electricity, and increase the usage time.

[0006] Based on the third transparent optical coating being attached to the first transparent optical coating and the second transparent optical coating on the side away from the light-emitting layer, and the first transparent optical coating and the second transparent optical coating forming a first interface, the first transparent optical coating and the third transparent optical coating forming a second interface, the second interface has a lower reflectivity. In addition, since the plurality of second transparent optical coatings and the plurality of sub-pixels are arranged in a one-to-one correspondence, the second transparent optical coating can focus the light emitted by the light-emitting layer, thereby improving the light extraction rate.

[0007] Since the first edge portion is located on the side of the first interface facing the light-emitting layer, the light emitted from the light-emitting layer enters from the first edge portion and then exits through the second transparent optical coating. Since the refractive index of the second transparent optical coating is greater than the refractive index of the first transparent optical coating, the incident angle of the light is greater than the exit angle, which can gather the light to improve the light output rate. It should be noted that gathering light and focusing in the embodiments of the present application both refer to being able to make the light move closer to the first direction, that is, being able to reduce the angle of the light relative to the first direction.

[0008] In some embodiments, each of the second transparent optical coatings includes a top surface, a bottom surface, and a side surface connected between the top surface and the bottom surface, the top surface is the surface where the second transparent optical coating and the third transparent optical coating are bonded, the bottom surface is the surface of the second transparent optical coating facing the light-emitting layer, the side surface and the first transparent optical coating are bonded to form the first interface, the size of the top surface in the second direction is greater than the size of the bottom surface in the second direction, and the second direction is perpendicular to the first direction. In this embodiment, the size of the top surface in the second direction is greater than the size of the bottom surface in the second direction. Thus, at least part of the first interface is not parallel to the reference surface, and the reference surface is perpendicular to the first direction, so that the first interface in this embodiment can play a role in gathering light.

[0009] In some embodiments, the tangent line on the side surface is arranged at a preset angle with the first direction. Since the tangent line on the side surface is arranged at a preset angle with the first direction, the side surface is inclined relative to the first direction, which is beneficial for the first interface to gather light.

[0010] In some embodiments, each second transparent optical coating has a gradually increasing radial dimension from the bottom surface toward the top surface, and the side surround of the second transparent optical coating is a trumpet-shaped structure. In the first direction, the projection of the bottom surface on the top surface is located inside the top surface. In this embodiment, since the side surround is a trumpet-shaped structure, the first interface formed by the side surface and the first transparent optical coating is inclined relative to the first direction, and each position of the first interface can play a role in gathering light after reflection, which is beneficial to improve the light output rate of the display panel in this embodiment, thereby improving the brightness in the external strong light environment, so that it can be used in strong light without adjusting the display brightness, which not only improves the user experience, but also saves electricity and increases the use time.

[0011] In some embodiments, the side surface is inclined relative to the first direction. Based on the side surface being inclined relative to the first direction, the first interface can at least partially play a role in gathering light.

[0012] In some embodiments, the top surface includes a middle area and an edge area located at the periphery of the middle area, the edge area is connected between the middle area and the first transparent optical coating, and a third interface is formed between the edge area and the third transparent optical coating, and the reflectivity of the third interface is greater than the reflectivity of the second interface. In this embodiment, the edge area is inclined relative to the second direction. For the third interface formed by the edge area and the third transparent optical coating, after entering, the external light can pass through the third interface and be reflected to the bottom of the pit, that is, reflected to the second interface, and the reflectivity of the second interface is relatively lower, so that the light can smoothly pass from the second interface to the first transparent optical coating, and then reach the corresponding optical sensor of the display panel. The display panel in this embodiment can improve the transmittance of external light, so that more external light can reach the corresponding optical sensor of the display panel, thereby improving the response sensitivity of the optical device.

[0013] In some embodiments, the vertical projection of the edge of the top surface on the light-emitting layer is located inside the pixel defining layer. In this embodiment, the vertical projection of the edge of the top surface on the light-emitting layer is located inside the pixel defining layer, so as to ensure that the light emitted from the sub-pixel falls within the range where the second transparent optical coating is located in a larger range, so as to make full use of the light emitted by the sub-pixel and improve the light extraction rate.

[0014] In some embodiments, the display panel further includes a color filter layer disposed between the light-emitting layer and the micron lens array layer, the color filter layer includes a black matrix and a plurality of color-resistance units, the black matrix is ​​located between the plurality of color-resistance units, and in the first direction, the black matrix is ​​disposed correspondingly to the first transparent optical coating, and the plurality of color-resistance units are disposed in a one-to-one correspondence with the plurality of second transparent optical coatings. The display panel in this embodiment can eliminate the polarizer, and based on the fact that in the first direction, the black matrix is ​​disposed correspondingly to the first transparent optical coating, and the color-resistance units are disposed in a one-to-one correspondence with the second transparent optical coating, it is beneficial to improve the light extraction efficiency and reduce the reflectivity.

[0015] In some embodiments, the vertical projection of the edge of the second transparent optical coating on the color filter layer is located inside the color resist unit. Since the vertical projection of the edge of the second transparent optical coating on the color filter layer is located inside the color resist unit, but not at the position corresponding to the black matrix, the first interface area is reduced, the overall reflectivity of the display panel is reduced, and the light transmittance is improved.

[0016] In some embodiments, the display panel further includes a fourth transparent optical coating layer, the fourth transparent optical coating layer is stacked on the side of the black matrix and the color resistance unit away from the light-emitting layer, and the first transparent optical coating layer and the second transparent optical coating layer are formed on the fourth transparent optical coating layer. Since the first transparent optical coating layer and the second transparent optical coating layer are formed on the fourth transparent optical coating layer, the fourth transparent optical coating layer can improve the flatness and facilitate the manufacturing process.

[0017] In some embodiments, the difference between the refractive index of the first transparent optical coating and the refractive index of the second transparent optical coating is greater than 0.2, and the difference between the refractive index of the first transparent optical coating and the refractive index of the third transparent optical coating is less than 0.2.

[0018] In this embodiment, based on the difference between the refractive index of the first transparent optical coating and the refractive index of the second transparent optical coating being greater than 0.2, the difference between the refractive index of the first transparent optical coating and the refractive index of the third transparent optical coating is less than 0.2. The second transparent optical coating has a high refractive index, which is conducive to gathering the light emitted by the light-emitting layer and improving the light output rate at a normal viewing angle. The second interface has a lower reflectivity, which is conducive to reducing the overall reflectivity of the display panel.

[0019] In some embodiments, the refractive index of the first transparent optical coating and the refractive index of the third transparent optical coating are both in a first range, the first range is less than 1.5, and the refractive index of the second transparent optical coating is in a second range, the second range is greater than 1.7.

[0020] In some embodiments, the refractive index of the first transparent optical coating and the refractive index of the third transparent optical coating are both in a first range of 1.47-1.52, and the refractive index of the second transparent optical coating is in a second range of 1.68-1.73.

[0021] In a second aspect, the present application provides an electronic device, comprising a housing and a display panel as described in any one of the first aspects above, wherein the display panel is mounted on the housing. The display panel of the electronic device in this embodiment has high light transmittance, and the optical sensor has good photosensitivity. The display panel of the electronic device in this embodiment has low reflectivity, and the display panel of the electronic device has high readability under strong light sources. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art are briefly introduced below.

[0023] Figure 1 A schematic diagram of the structure of a possible electronic device provided in an embodiment of the present application;

[0024] Figure 2 for Figure 1 An exploded schematic diagram of the electronic equipment in the;

[0025] Figure 3 A schematic diagram of a possible display panel structure provided in an embodiment of the present application;

[0026] Figure 4 for Figure 3 A schematic structural diagram of a light-emitting layer of a display panel in an embodiment;

[0027] Figure 5 for Figure 3 A schematic structural diagram of a stacked micron lens array layer and a third transparent optical coating layer of a display panel in the embodiment;

[0028] Figure 6 for Figure 5 A schematic diagram of another viewing angle of the embodiment;

[0029] Figure 7 for Figure 5 A schematic structural diagram of a first transparent optical coating in a micron lens array layer of an embodiment;

[0030] Figure 8 for Figure 5 A schematic structural diagram of a second transparent optical coating in a micron lens array layer in an embodiment;

[0031] Fig. 9 for Figure 3 A schematic diagram of the structure of a display panel in the embodiment;

[0032] Fig.10 for Fig. 9 Light path diagram of the display panel of the embodiment;

[0033] Fig.11a This is one of the structural schematic diagrams of the second transparent optical coating in some other embodiments of the present application;

[0034] Fig.11b This is one of the structural schematic diagrams of the second transparent optical coating in some other embodiments of the present application;

[0035] Fig.11c This application is one of the structural schematic diagrams of the second transparent optical coating in some other embodiments;

[0036] Fig.12 It is a schematic diagram of the structure of the display panel in some other embodiments of the present application;

[0037] Fig.13 for Fig.12 A reflectivity spectrum diagram of a display panel in and an existing display panel;

[0038] Fig.14 It is a schematic diagram of the structure of the display panel in some other embodiments of the present application;

[0039] Fig.15 for Fig.14 Transmittance spectrum of the display panel compared with the existing display panel. Description of the drawings:

[0041] Z, first direction; M, second direction; a, reference plane; b, tangent line; c, preset angle;

[0042] 100, electronic device; 101, housing; 102, display panel; 103, main controller; 104, battery; 105, optical sensor;

[0043] 10. Substrate;

[0044] 20. Light-emitting layer; 21. Pixel circuit layer; 22. Pixel defining layer; 23. Sub-pixel; 24. Anode layer; 25. Cathode layer; 26. Encapsulation layer; 27. Flat layer;

[0045] 30. micron lens array layer; 301. first interface; 302. second interface; 303. third interface; 31. first transparent optical coating; 311. first edge portion; 32. second transparent optical coating; 321. top surface; 3211. middle area; 3212. edge area; 322. bottom surface; 323. side surface; 33. pit structure;

[0046] 40. A third transparent optical coating;

[0047] 50. color filter layer; 51. black matrix; 52. color resistance unit;

[0048] 60. A fourth transparent optical coating;

[0049] 70. Polarizer;

[0050] 80. Transparent optical adhesive layer. DETAILED DESCRIPTION

[0051] The following first explains some terms involved in the embodiments of the present application.

[0052] The terms "first", "second", "third", "fourth", etc. in the specification and claims of the embodiments of the present application and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the data used in this way can be interchangeable where appropriate, so that the embodiments of the present application described herein can be implemented in an order other than those illustrated or described herein, for example. In addition, the terms "including" and "having" and any of their variations are intended to cover non-exclusive inclusions, for example, a process, method, system, product or device comprising a series of steps or units is not necessarily limited to those steps or units clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0053] In this specification, the terms "perpendicular" and "parallel" are explained.

[0054] Vertical: The verticality defined in this application is not limited to an absolute vertical intersection relationship (angle of 90 degrees). It allows for non-absolute vertical intersection relationships caused by factors such as assembly tolerance, design tolerance, and influence of structural flatness. It also allows for errors in a small angle range. For example, the assembly error range of 80 to 100 degrees can be understood as a vertical relationship.

[0055] Parallelism: The parallelism defined in this application is not limited to absolute parallelism. This definition of parallelism can be understood as basic parallelism, which allows for situations where the absolute parallelism is not caused by factors such as assembly tolerance, design tolerance, and influence of structural flatness. These situations will lead to the sliding fitting part and the first door panel not being absolutely parallel, but this application also defines this situation as parallelism.

[0056] Figure 1 A schematic diagram of a possible electronic device 100 provided in an embodiment of the present application; Figure 2 for Figure 1 Schematic diagram of an exploded view of the electronic device 100.

[0057] See also Figure 1, the electronic device 100 displays moving images or still images, so various products with a display function can be the electronic device 100 in this embodiment, and the electronic device 100 can be such as a portable electronic device 100 (such as a mobile phone, a smart phone, a tablet personal computer (PC), a mobile communication terminal, an electronic notebook, an electronic book, a portable multimedia player (PMP), a navigation device and an ultra-mobile PC (UMPC) as well as a television, a notebook computer, a monitor, an advertising panel and an Internet of Things (IoT) device. The electronic device 100 can also be a wearable device such as a smart watch, a watch phone, a glasses-type display and a head-mounted display (HMD). The electronic device 100 can also be a dashboard of a vehicle, a central information display (CID) of a center fascia or dashboard of a vehicle, an interior mirror display instead of a side mirror of a vehicle, and a display arranged or set on the rear side of a front seat to be used as an entertainment device for rear seat passengers of the vehicle.

[0058] For ease of explanation, Figure 1 and Figure 2 A smartphone is shown as the electronic device 100 of this embodiment. The electronic device 100 of this embodiment may include a housing 101 , a display panel 102 , a main controller 103 , and a battery 104 .

[0059] The housing serves as a structural bearing component of the display panel 102 and is used to install the display panel 102 , as well as to accommodate or install other components such as the main controller 103 and the battery 104 .

[0060] The shape of the shell is roughly rectangular, but this does not mean that the shell has only one embodiment of a rectangular shape. In other embodiments, the shell can also be circular, square or some irregular shapes.

[0061] The main controller 103 may be disposed on the display panel 102, and in other embodiments, may also be disposed in the housing, and the embodiment of the present application does not limit the specific location of the main controller 103. The main controller 103 includes but is not limited to a system on a chip (System On Chip, SOC), and the main controller 103 is used to output video data, clock signals and / or main commands to the display panel 102. In other embodiments, the main controller 103 may also include various types of processors such as an application processor (Application Processor, AP) or a general processor.

[0062] The display panel 102 is not only applicable to the above display device, but also to any device that needs to display text, images, videos, etc., and the embodiments of the present application do not strictly limit this. The display panel 102 can be used to display text, images, videos, etc. The display panel 102 can be a folding screen, and the display panel 102 can also be implemented using a flexible screen or a hard display panel 102. The specific type can be an organic light-emitting diode (OLED) display panel 102, and can also be a (Light Emitting Diode, LED) display panel 102 or a micro light-emitting diode (mirco Light Emitting Diode, mirco LED) display panel 102, etc. For the convenience of description below, the display panel 102 is OLED for example.

[0063] Figure 3 A schematic diagram of the structure of a possible display panel 102 provided in an embodiment of the present application.

[0064] See also Figure 3 The display panel 102 includes a substrate 10, a light-emitting layer 20, a micron lens array layer 30 and a third transparent optical coating layer 40. The substrate 10, the light-emitting layer 20, the micron lens array layer 30 and the third transparent optical coating layer 40 are stacked. For the convenience of description, the direction in which the substrate 10, the light-emitting layer 20, the micron lens array layer 30 and the third transparent optical coating layer 40 are stacked is a first direction Z, and a plane perpendicular to the first direction Z is a reference plane a. In some embodiments, the light-emitting layer 20 is located on the substrate 10, the third transparent optical coating 40 is located on the micron lens array layer 30, the micron lens array layer 30 is located between the light-emitting layer 20 and the third transparent optical coating 40, the substrate is mainly used to support the light-emitting layer 20, the micron lens array layer 30 and the third transparent optical coating 40, the light-emitting layer 20 can emit light, the micron lens array layer 30 can gather part of the light emitted by the light-emitting layer 20, for example, when part of the light emitted by the light-emitting layer 20 passes through the micron lens array layer 30, it can reduce the angle between the light and the first direction Z, thereby gathering the light, and the third transparent optical coating 40 is used to cover the micron lens array layer 30.

[0065] The substrate 10 can be configured in various shapes. For example, the substrate 10 can be configured in an approximately rectangular shape. The substrate 10 can also be configured in a circular, directional or other irregular shape as required.

[0066] The substrate 10 may be made of an insulating material such as glass, ceramic or resin. In some embodiments, the substrate 10 may be made of a flexible material that is bendable or foldable and has a single-layer or multi-layer structure. For example, the flexible material may include at least one of polystyrene, polyvinyl alcohol, polymethyl methacrylate, polyether sulfone, polyacrylate, polyetherimide, polyethylene naphthalate, polyethylene terephthalate, polyphenylene sulfide, polyarylate, polyimide, polycarbonate, cellulose triacetate, cellulose acetate propionate, etc. However, the material forming the substrate 10 is not limited to the above-mentioned embodiments.

[0067] Figure 4 for Figure 3 Schematic diagram of the structure of the light-emitting layer 20 of the display panel 102 of the embodiment.

[0068] See also Figure 4 The light-emitting layer 20 includes a pixel circuit layer 21, a pixel defining layer 22, a sub-pixel 23, an anode layer 24, a cathode layer 25 and an encapsulation layer 26. The anode layer 24 and the cathode layer 25 are used to supply electrons to the sub-pixel 23. The pixel circuit layer 21 is used to control the sub-pixel 23, and the sub-pixel 23 can be used to emit light. It can be understood that the light-emitting layer 20 in this embodiment can include a plurality of sub-pixels 23.

[0069] The pixel circuit layer 21 may include a transistor and a signal line electrically connected to the transistor. For example, each of the transistors may have a form in which a semiconductor layer, a gate electrode, a source electrode / drain electrode are stacked in sequence and an insulating layer is interposed therebetween. The semiconductor layer may include amorphous silicon, polycrystalline silicon such as low-temperature polycrystalline silicon, an oxide semiconductor, and an organic semiconductor. The gate electrode and the source electrode / drain electrode may include at least one of aluminum (Al), copper (Cu), titanium (Ti), and molybdenum (Mo), but the present disclosure is not limited thereto. The pixel circuit layer 21PCL may include at least one insulating layer.

[0070] The pixel circuit layer 21 is disposed on the substrate 10 (eg Figure 3 ), for example, in some embodiments, the pixel circuit layer 21 is disposed on the substrate 10 through a buffer layer, and the buffer layer can prevent impurities from diffusing into transistors included in the pixel circuit layer 21. The buffer layer can be an inorganic insulating film including an inorganic material.

[0071] The sub-pixel 23 may refer to a light emitting area as a minimum unit that can realize an image. In the case where an organic light emitting diode is used as a display element, the emission area may be defined by an opening of the pixel defining layer 22. This will be described later.

[0072] The sub-pixel 23 may have a pentile (or "five-tile") structure. The light-emitting layer 20 may include a red sub-pixel 23, a green sub-pixel 23, and a blue sub-pixel 23, which may emit red, green, and blue light, respectively. It is understood that in practical applications, the OLED display panel 102 may also adopt a red-green-blue-white (RGBW) color matching mode, in which case each pixel includes four sub-pixels 23, and the four sub-pixels 23 include a sub-pixel 23 that can display red light, a sub-pixel 23 that can display green light, a sub-pixel 23 that can display blue light, and a sub-pixel 23 that can display white light.

[0073] The pixel defining layer 22 is directly or indirectly disposed on the pixel circuit layer 21. The pixel defining layer 22 is located between the sub-pixels 23 and surrounds the sub-pixels 23. The pixel defining layer 22 surrounds and forms an emission region. The sub-pixels 23 are disposed in the emission region. The region adjacent to the emission region is a non-emission region. The pixel defining layer 22 is located in the non-emission region. The pixel defining layer 22 can prevent the sub-pixels 23 from being disposed in the non-emission region. In addition, the pixel defining layer 22 can prevent a short circuit from occurring between the sub-pixels 23 and the components in the non-emission region.

[0074] The pixel defining layer 22 may include an insulating material including an inorganic material and / or an organic material. In some embodiments, the pixel defining layer 22 may include at least one inorganic layer including various inorganic insulating materials including silicon nitride (SiNx), silicon oxide (SiOx), etc. In other embodiments, the pixel defining layer 22PDL may include at least one organic layer including various organic insulating materials and / or a photoresist layer, or may be configured as a single-layer or multi-layer insulator including a combination of organic / inorganic materials. For example, the material forming the pixel defining layer 22 may be changed differently.

[0075] In some embodiments, the pixel defining layer 22 may include at least one light blocking material and / or at least one reflective material to prevent light leakage defects in which light (or light beams) leak between pixels PXL. In some embodiments, the pixel defining layer 22 may include a transparent material (or substance). The transparent material (or substance) may include, for example, a polyamide resin, a polyimide resin, etc., but the present disclosure is not limited thereto. In some embodiments, a reflective material layer (or reflective layer) may be separately provided and / or formed on the pixel defining layer 22 to further improve the efficiency of light emitted from each sub-pixel 23.

[0076] The anode layer 24 is located on the side of the sub-pixel 23 facing the substrate, and is also located within the emission region defined by the pixel defining layer 22 . In some other embodiments, the pixel defining layer 22 may also partially overlap with the edge of the anode layer 24 .

[0077] The cathode layer 25 is located on the side of the sub-pixel 23 away from the substrate. The cathode layer 25 has at least sufficient light transmittance so that the light emitted by the light-emitting unit of the sub-pixel 23 can be emitted to the outside through the cathode layer 25 .

[0078] It is understandable that in some other embodiments, the anode layer 24 may be located on the side of the sub-pixel 23 away from the substrate, and the anode layer 24 has at least sufficient light transmittance so that the light emitted by the light-emitting unit of the sub-pixel 23 can be emitted to the outside through the cathode layer 25.

[0079] In order to improve the injection efficiency of holes, the anode layer 24 should be composed of a material with as high a work function as possible, such as indium tin oxide (ITO). Of course, in some embodiments, the anode layer 24 can be a reflective electrode and can include one or more layers. For example, the anode layer 24 can include metals such as aluminum, molybdenum, titanium, a mixture of titanium and tungsten, silver, gold, or their alloys. The anode layer 24 may include a transparent conductive layer and a reflective layer, and the transparent conductive layer includes a conductive material such as a transparent conductive oxide (TCO), a carbon nanotube film, or a transparent conductive polymer. In some other embodiments, the anode layer 24 can also be a three-layer including an upper transparent conductive layer, a lower transparent conductive layer, and a reflective layer located between the upper transparent conductive layer and the lower transparent conductive layer.

[0080] Regarding the selection of the material of the cathode layer 25, in some embodiments, the cathode layer 25 may be a transparent or semi-transparent electrode. For example, the cathode layer 25 may include a conductive material such as TCO, a carbon nanotube film, or a transparent conductive polymer.

[0081] The encapsulation layer 26 may be a thin film encapsulation layer 26, and the thin film encapsulation layer 26 may be arranged in the form of an encapsulation substrate 10 or a multi-layered encapsulation layer 26. The thin film encapsulation layer 26 may include an inorganic layer and / or an organic layer. For example, the thin film encapsulation layer 26 may be arranged in a form in which an inorganic layer, an organic layer, and an inorganic layer are stacked in sequence. The thin film encapsulation layer 26 may prevent external air and external moisture from penetrating into the sub-pixel 23, the anode layer 24, the cathode layer 25, and the pixel circuit layer 21.

[0082] In some embodiments, the light emitting layer 20 further includes a planar layer 27 , which is disposed on the encapsulation layer 26 . The encapsulation layer 26 facilitates subsequent processes.

[0083] The planarization layer 27 is used to planarize the encapsulation layer 26 , so as to facilitate reliable arrangement of other layer structures on the encapsulation layer 26 .

[0084] The planar layer 27 is made of a highly light-transmitting material. In some embodiments, the planar layer 27 may be made of at least one material selected from acrylic resin, epoxy resin, phenolic resin, polyurethane, polyamide resin, polyimide resin, unsaturated polyester, and the like.

[0085] Figure 5 for Figure 3 FIG. 1 is a schematic structural diagram of a stacked structure of a micron lens array layer 30 and a third transparent optical coating layer 40 of a display panel 102 in the embodiment.

[0086] See also Figure 5 The micron lens array layer 30 includes a first transparent optical coating 31 and a plurality of second transparent optical coatings 32. The first transparent optical coating 31 and the plurality of second transparent optical coatings 32 are located in the same layer. The plurality of second transparent optical coatings 32 are arranged at intervals. The first transparent optical coating 31 is located between the plurality of second transparent optical coatings 32, and the first transparent optical coating 31 is adjacent to the second transparent optical coating 32. The adjacent in this embodiment means fitting and contacting, which is also the case in the following text and will not be elaborated here.

[0087] The material of the first transparent optical coating 31 can be composed of a material with high light transmittance, for example, it can be a transparent optical coating with a low refractive index (Low Refractive Index Optical Overcoat, LOC). For example, the material of the first transparent optical coating 31 can be a low-refractive optical adhesive. Optical adhesive is a double-sided bonding tape without a matrix material, which has the characteristics of colorless transparency, high light transmittance (total light transmittance>99%), high adhesion, high temperature resistance, UV resistance, etc., and has a controlled thickness, can provide uniform spacing, and will not cause yellowing, peeling and deterioration problems after long-term use.

[0088] In some embodiments, the optical adhesive can be a liquid optical adhesive (Liquid Optical Clear Adhesive, LOCA). LOCA is a liquid glue that is colorless and transparent after curing, has a light transmittance of more than 98%, and has the characteristics of small curing shrinkage and yellowing resistance. In the field of full bonding, compared with traditional OCA tapes, LOCA has unique advantages in large sizes, curved surfaces, harsh environments and other fields. For example. The LOCA can be an optical clear resin (Optical Clear Resin, OCR). In some other embodiments, the first transparent optical coating 31 can also be composed of at least one material selected from acrylic resin, epoxy resin, phenolic resin, polyurethane, polyamide resin, polyimide resin, unsaturated polyester, etc.

[0089] The material of the second transparent optical coating 32 can be composed of a material with high light transmittance, for example, it can be a transparent optical coating with a high refractive index (High Refractive Index Optical Overcoat). For example, the material of the second transparent optical coating 32 can be a high refractive index acrylic resin, polyimide resin, siloxane resin, phenolic resin, and the above resin system compounded with metal nanoparticles, etc., and the present application does not limit this.

[0090] The material of the third transparent optical coating 40 can be composed of a material with high light transmittance, such as optical adhesive (Optical Overcoat) or optically clear adhesive (OCA). Optical adhesive is a double-sided bonding tape without a matrix material, which has the characteristics of colorless transparency, high light transmittance (total light transmittance>99%), high adhesion, high temperature resistance, UV resistance, etc., and has a controlled thickness, can provide uniform spacing, and will not cause yellowing, peeling and deterioration problems after long-term use.

[0091] The third transparent optical coating 40 may also be made of at least one material selected from acrylic resin, epoxy resin, phenolic resin, polyurethane, polyamide resin, polyimide resin, unsaturated polyester, and the like.

[0092] Figure 6 for Figure 5 A schematic diagram of another viewing angle of the embodiment; Figure 7 for Figure 5 A schematic structural diagram of the first transparent optical coating 31 in the micron lens array layer 30 of the embodiment; Figure 8 for Figure 5 A schematic structural diagram of the second transparent optical coating 32 in the micron lens array layer 30 of the embodiment; Fig. 9 for Figure 3 A schematic diagram of the structure of the display panel 102 in the embodiment; Fig.10 for Fig. 9 Light path diagram of the display panel 102 of the embodiment.

[0093] See also Figure 5-Figure 9In some embodiments, the refractive index of each second transparent optical coating 32 is greater than the refractive index of the first transparent optical coating 31 and the refractive index of the third transparent optical coating 40. The first transparent optical coating 31 and the pixel defining layer 22 are arranged correspondingly in the first direction Z. The plurality of second transparent optical coatings 32 and the plurality of sub-pixels 23 are arranged one-to-one in the first direction Z. The third transparent optical coating 40 is attached to the surface of the first transparent optical coating 31 and the surfaces of the plurality of second transparent optical coatings 32. In this embodiment, since the plurality of second transparent optical coatings 32 are arranged at intervals, the first transparent optical coating 31 is located between the plurality of second transparent optical coatings 32, and the third transparent optical coating 40 is attached to the surface of the first transparent optical coating 31 and the surfaces of the plurality of second transparent optical coatings 32. Therefore, at least part of the surface of the first transparent optical coating 31 is not attached to the second transparent optical coating 32. Compared with the solution in which the second transparent optical coating 32 is completely attached to the outer surface of the first transparent optical coating 31, in this embodiment, the first transparent optical coating 31 and the second transparent optical coating 32 have fewer attached contact interfaces, and the third transparent optical coating 40 and the second transparent optical coating 32 are attached to the contact interface. The touch interface is reduced, and the refractive index of each second transparent optical coating 32 is greater than the refractive index of the first transparent optical coating 31 and the refractive index of the third transparent optical coating 40, so that the high reflectivity reflective interface formed by the first transparent optical coating 31 and the second transparent optical coating 32 and the third transparent optical coating 40 and the second transparent optical coating 32 can be reduced, so that the reflectivity of the display panel 102 in this embodiment can be reduced as a whole, and then the transmittance of the display panel 102 in this embodiment can be improved, so that the light entering from the outside can pass through the display panel 102 more to reach the corresponding light sensor, such as the fingerprint recognition sensor, so as to improve the fingerprint recognition rate. In addition, the second transparent optical coating 32 can change the propagation path of the light emitted from the self-luminous layer 20, increase the positive angle of light, and can be emitted more from the light emitting surface of the display panel 102, so that the light output rate of the display panel 102 in this embodiment can be improved, the power consumption of electronic equipment can be reduced, and the battery life of the mobile phone can be increased.

[0094] In some embodiments, a first interface 301 is formed between the first transparent optical coating 31 and the second transparent optical coating 32. It can be understood that the first interface 301 is composed of the surface of the first transparent optical coating 31 attached to the second transparent optical coating 32 and the surface of the second transparent optical coating 32 attached to the first transparent optical coating 31. A second interface 302 is formed between the first transparent optical coating 31 and the third transparent optical coating 40. It can be understood that the second interface 302 is composed of the surface of the first transparent optical coating 31 attached to the third transparent optical coating 40 and the surface of the third transparent optical coating 40 attached to the first transparent optical coating 31.

[0095] In some embodiments, the reflectivity of the first interface 301 is greater than the reflectivity of the second interface 302. Based on the fact that the third transparent optical coating 40 is attached to the side of the first transparent optical coating 31 and the second transparent optical coating 32 away from the light-emitting layer 20, and the first interface 301 is formed between the first transparent optical coating 31 and the second transparent optical coating 32, and the second interface 302 is formed between the first transparent optical coating 31 and the third transparent optical coating 40, the reflectivity of the first interface 301 is greater than the reflectivity of the second interface 302, so the second interface 302 formed by the contact portion of the first transparent optical coating 31 and the third transparent optical coating 40 has a lower reflectivity, which reduces the overall reflectivity of the display panel 102, while increasing the transmittance and improving the light intensity that the ambient light sensor can receive. In addition, since the plurality of second transparent optical coatings 32 and the plurality of sub-pixels 23 are arranged one by one, the second transparent optical coating 32 can focus the light emitted by the light-emitting layer 20, improve the light output rate at the normal viewing angle, and reduce the power consumption of the electronic device 100, for example, increase the battery life of the mobile phone.

[0096] In some embodiments, the portion where the first transparent optical coating 31 and the second transparent optical coating 32 are bonded is located on the side of the first interface 301 facing the light-emitting layer 20. For ease of description, the portion bonded to the second transparent optical coating 32 is set as the first edge portion 311. In some possible embodiments, the first edge portion 311 completely overlaps with the first interface 301 in the first direction Z, that is, the vertical projection of the first edge portion 311 on the reference plane a overlaps with the vertical projection of the second interface 302 on the reference plane a. In this embodiment, since the first edge portion 311 is located on the side of the first interface 301 facing the light-emitting layer 20, the light emitted from the light-emitting layer 20 enters from the first edge portion 311 and then exits through the second transparent optical coating 32. Since the refractive index of the second transparent optical coating 32 is greater than the refractive index of the first transparent optical coating 31, the incident angle of the light is greater than the exit angle, so that the light can be gathered to improve the light output rate at a normal viewing angle. It should be noted that, in the embodiments of the present application, both gathering light and focusing light refer to being able to make the light move closer to the first direction Z, that is, being able to reduce the angle of the light relative to the first direction Z, which will not be elaborated in the following text.

[0097] It is understandable that in some other embodiments, the portion in contact with the second transparent optical coating 32 may not completely overlap with the first interface 301 in the first direction Z.

[0098] See also Figure 5-Figure 8In some embodiments, the size of each second transparent optical coating 32 at one end away from the light emitting layer 20 in the first direction Z is larger than the size at one end close to the light emitting layer 20. In some implementations, the cross-sectional area of ​​the end of the second transparent optical coating 32 away from the light emitting layer 20 in the first direction Z is larger than the cross-sectional area of ​​the end close to the light emitting layer 20. Since the cross-sectional area of ​​the end of the second transparent optical coating 32 facing the light emitting layer 20 is smaller than the cross-sectional area of ​​the end of the second transparent optical coating 32 away from the light emitting layer 20, at least part of the first incident surface is not perpendicular and parallel to the first direction Z, so that the light emitted by the light emitting layer 20 can be gathered by reflection from the first interface 301, which is beneficial to improve the light extraction rate.

[0099] For the convenience of description, the second direction M is set to be perpendicular to the first direction Z.

[0100] In some embodiments, each second transparent optical coating 32 includes a top surface 321, a bottom surface 322, and a side surface 323 connected between the top surface 321 and the bottom surface 322, and the first interface 301 is formed by laminating the side surface 323 and the first transparent optical coating 31. In some embodiments, the top surface 321 is a surface where the second transparent optical coating 32 and the third transparent optical coating 40 are laminated, and the bottom surface 322 is a surface of the second transparent optical coating 32 facing the light-emitting layer 20, and the size of the top surface 321 in the second direction M is greater than the size of the bottom surface 322 in the second direction M. Since the size of the top surface 321 in the second direction M is greater than the size of the bottom surface 322 in the second direction M. Therefore, at least part of the first interface 301 is not parallel to the reference plane a, so that the first interface 301 in this embodiment can play a role in gathering light.

[0101] In some embodiments, in the first direction Z, the vertical projection area of ​​the top surface 321 on the reference plane a is greater than the vertical projection area of ​​the bottom surface 322 on the reference plane a. Since the vertical projection area of ​​the top surface 321 on the reference plane a is greater than the vertical projection area of ​​the bottom surface 322 on the reference plane a, at least a portion of the first interface 301 of the side surface 323 is not parallel to the reference plane a, so that at least a portion of the first interface 301 can play a role in gathering light.

[0102] In some embodiments, the tangent line b on the side surface 323 is set at a preset angle c with the first direction Z. It is understandable that the preset angle c in this embodiment is not equal to 0 degrees. Since the tangent line b on the side surface 323 is set at a preset angle c with the first direction Z, the side surface 323 is inclined relative to the first direction Z, which is beneficial for the first interface 301 to gather light.

[0103] In some embodiments, each second transparent optical coating 32 has a gradually increasing radial dimension from the bottom surface 322 toward the top surface 321, and the side surface 323 of the second transparent optical coating 32 surrounds a trumpet-shaped structure. In the first direction Z, the projection of the bottom surface 322 on the top surface 321 is located inside the top surface 321. In this embodiment, since the side surface 323 surrounds the trumpet-shaped structure, the first interface 301 formed by the side surface 323 and the first transparent optical coating 31 is inclined relative to the first direction Z, and each position of the first interface 301 can play a role in gathering light after reflection, which is beneficial to improve the front viewing angle light output rate of the display panel 102 in this embodiment, reduce the power consumption of the electronic device 100, for example, increase the battery life of the mobile phone.

[0104] In some embodiments, the top surface 321 includes a middle area 3211 and an edge area 3212 located at the periphery of the middle area 3211, the edge area 3212 is connected between the middle area 3211 and the first transparent optical coating 31, a pit structure 33 is formed between the edge areas 3212 of two adjacent second transparent optical coatings 32, a portion of the surface of the first transparent optical coating 31 is the bottom wall of the pit structure 33, and a portion of the third transparent optical coating 40 is located in the pit structure 33.

[0105] Based on the formation of the pit structure 33 between the edge regions 3212 of two adjacent second transparent optical coatings 32, the third transparent optical coating 40 is located in the pit structure 33, so that the bonding area between the third transparent optical coating 40 and the first transparent optical coating 31 and the second transparent optical coating 32 can be increased. In this embodiment, the first transparent optical coating 31 is formed first, and then the second transparent optical coating 32 is formed. In this process, the pit structure 33 is formed to reduce the process difficulty.

[0106] In some embodiments, a third interface 303 is formed between the edge region 3212 and the third transparent optical coating 40, and the reflectivity of the third interface 303 is greater than the reflectivity of the second interface 302. In this embodiment, since the edge region 3212 is the side surface 323 of the pit, the edge region 3212 is inclined relative to the second direction M. For the third interface 303 formed by the edge region 3212 and the third transparent optical coating 40, after entering the third interface 303, the external light can pass through the third interface 303 and be reflected to the bottom of the pit, that is, reflected to the second interface 302, and the reflectivity of the second interface 302 is relatively lower, so that the light can smoothly pass from the second interface 302 to the first transparent optical coating 31, and then reach the corresponding optical sensor 105 of the display panel 102. The display panel 102 in this embodiment can improve the transmittance of the external light, so that more external light can reach the corresponding optical sensor 105 of the display panel 102, and improve the response sensitivity of the optical device. For example, for a fingerprint recognition sensor, the display panel 102 in this embodiment can improve the recognition efficiency of the fingerprint recognition sensor.

[0107] In some embodiments, the third transparent optical coating 40 is completely filled in the pit structure 33, and the second interface 302 is formed by the bottom wall of the pit structure 33 and the third transparent optical coating 40. In this embodiment, the second interface 302 is formed by the bottom wall of the pit structure 33 and the third transparent optical coating 40, and the third interface 303 is formed by the side wall of the pit structure 33 and the third transparent optical coating 40, so that the second interface 302 and the third interface 303 can complement each other and improve the transmittance of external light.

[0108] In some embodiments, in the first direction Z, the projection of the middle region 3211 on the reference plane a is located inside the projection of the edge region 3212 on the reference plane a. In this embodiment, the projection of the middle region 3211 on the reference plane a is located inside the projection of the edge region 3212 on the reference plane a, so that it is easier to form during production.

[0109] In some embodiments, the middle region 3211 is a plane, the edge region 3212 is a curved surface, and the center of the curved surface is located inside the second transparent optical coating 32, that is, the curved surface is a convex curved surface for the second transparent optical coating 32. In some embodiments, in the second direction M, the outer diameter of the edge region 3212 gradually decreases in the direction away from the light-emitting layer 20, so that the reflection effect of the third interface 303 formed by the edge region 3212 and the third transparent optical coating 40 is better, and the external light can be more reflected from the third interface 303 to the second interface 302 after entering, and then reach the corresponding optical sensor 105, which is conducive to improving the transmission effect of the external light.

[0110] In some embodiments, the vertical projection of the edge of the top surface 321 on the light-emitting layer 20 is located inside the pixel defining layer 22. In this embodiment, the vertical projection of the edge of the top surface 321 on the light-emitting layer 20 is located inside the pixel defining layer 22, so that a larger range of light emitted from the sub-pixel 23 can be ensured to fall within the range where the second transparent optical coating 32 is located, so as to make full use of the light emitted by the sub-pixel 23 and improve the light extraction rate.

[0111] It can be understood that, in some other embodiments, the second transparent optical coating 32 can also be in other shapes besides the shapes in the above embodiments.

[0112] In some embodiments, the difference between the refractive index of the first transparent optical coating 31 and the refractive index of the second transparent optical coating 32 is greater than 0.2, and the difference between the refractive index of the first transparent optical coating 31 and the refractive index of the third transparent optical coating 40 is less than 0.2. In this embodiment, based on the fact that the difference between the refractive index of the first transparent optical coating 31 and the refractive index of the second transparent optical coating 32 is greater than 0.2, the difference between the refractive index of the first transparent optical coating 31 and the refractive index of the third transparent optical coating 40 is less than 0.2. Thus, the first interface 301 has a higher reflectivity, while the second interface 302 has a lower reflectivity interface, so that the light emitted by the light-emitting layer 20 is gathered through the first interface 301, thereby improving the light extraction rate. The second interface 302 reduces the reflectivity, which is conducive to improving the transmittance of external light.

[0113] In some implementations, the difference between the refractive index of the first transparent optical coating 31 and the refractive index of the third transparent optical coating 40 is 0. In this implementation, this can be achieved by using the same material for the first transparent optical coating 31 and the third transparent optical coating 40 .

[0114] In some embodiments, the refractive index of the first transparent optical coating 31 and the refractive index of the third transparent optical coating 40 are both in a first range less than 1.5, and the refractive index of the second transparent optical coating 32 is in a second range greater than 1.7.

[0115] In some embodiments, the refractive index of the first transparent optical coating 31 and the refractive index of the third transparent optical coating 40 are both in a first range, the first range is 1.47-1.52, for example, 1.47, 1.48, 1.49, 1.5, 1.51, 1.52, and the refractive index of the second transparent optical coating 32 is in a second range, the second range is 1.68-1.73, for example, 1.68, 1.69, 1.7, 1.7, 1.71, 1.72, 1.73.

[0116] See also Fig.10 , Fig.10FIG. 1 is a light path diagram of the display panel 102 in the embodiment of the present application, and is specifically described by five light paths, namely L1, L2, L3, L4 and L5. The reflectivity of the first interface 301 is higher than the reflectivity of the second interface 302.

[0117] The light L1 represents a series of light rays emitted from the sub-pixel 23 and then directly emitted through the first transparent optical coating 31. The light L1 is emitted from the sub-pixel 23 and then emitted from the light-emitting surface of the display panel 102 through the first transparent optical coating 31. Since the first transparent optical coating 31 has a high refractive index, the first transparent optical coating 31 can produce a certain focusing lens effect. After passing through the first transparent optical coating 31, part of the light L1 can move toward the first direction Z. After passing through the first transparent optical coating 31, the angle formed by the part of the light L1 and the first direction Z is reduced. Therefore, when the part of the light reaches the light-emitting surface of the display panel 102, more light L1 can be emitted from the light-emitting surface of the display panel 102. In this embodiment, part of the light L1 that originally could not be emitted from the light-emitting surface of the display panel 102 can be smoothly emitted from the light-emitting surface of the display panel 102 after being concentrated by the first transparent optical coating 31, thereby improving the light extraction rate of the display panel 102 in this embodiment.

[0118] The light L2 represents a series of light rays emitted from the sub-pixel 23 and then reflected by the first interface 301. The light L2 is emitted from the sub-pixel 23 and then reflected by the first interface 301. After the reflection, the light L2 moves closer to the first direction Z, that is, the angle formed by the light L2 and the first direction Z after being reflected by the first interface 301 decreases. Thus, the part of the light L2 can be closer to the light emitting surface of the display panel 102 in the first direction, thereby improving the light emitting rate of the display panel 102 at a normal viewing angle in this embodiment.

[0119] Light L3 represents a series of light rays emitted from the sub-pixel 23 and sequentially passing through the first edge portion 311 and the second transparent optical coating 32. Since the first edge portion 311 is located on the side of the first interface 301 facing the light emitting layer 20 in the first direction Z, the light ray L3 is emitted from the sub-pixel 23, then enters the first edge portion 311, and then passes through the first edge portion 311 to enter the second transparent optical coating 32. In this process, since the refractive index of the first transparent optical coating 31 is smaller than the refractive index of the second transparent optical coating 32, the incident angle of the light ray L3 when entering the first edge portion 311 is greater than the exit angle when exiting from the first edge portion 311 to enter the second transparent optical coating 32, so that the light ray L3 can move toward the first direction Z, which plays a role in gathering the light rays. Light L4 represents a series of light rays that enter from the outside and then pass through the second interface 302 without being reflected by the third interface 303. Since the reflectivity of the second interface 302 is low, the series of light rays represented by the light ray L4 can smoothly pass through the second interface 302 to reach the corresponding light sensor of the display panel 102. This increases the transmittance of external light.

[0120] Light L5 represents a series of light rays that enter from the outside, are reflected by the third interface 303, and then enter the first transparent structure through the second interface 302. Compared with when the third interface 303 is perpendicular to the first direction Z, most of the light rays from the outside are re-emitted from the light-emitting surface after reflection. In this embodiment, since the third interface 303 is tilted relative to the first direction Z, part of the light L5 is reflected by the third interface 303, so that the emission direction of the light L5 is toward the second interface 302, so that it smoothly enters the first transparent structure and reaches the corresponding light sensor. In this embodiment, part of the light L5 that cannot smoothly reach the light sensor can smoothly reach the light sensor, such as the fingerprint recognition sensor, which can improve the fingerprint recognition efficiency.

[0121] It is understandable that the optical sensor mentioned above may include not only a fingerprint recognition sensor. The optical sensor in this embodiment may include a light sensor for detecting the brightness of the surrounding environment and automatically adjusting the screen brightness to save power. The optical sensor may also include a distance sensor that detects the distance between the mobile phone and the user through technologies such as infrared or laser beams, and is used for functions such as automatically turning off the screen or adjusting the call volume. The optical sensor may also include a face recognition sensor and a heart rate sensor.

[0122] In some implementations, the display panel 102 further includes a transparent optical adhesive layer 80 (Optically Clear Adhesive), and the transparent optical adhesive covers the outside of the third transparent optical coating layer 40 .

[0123] Fig.11aThis is one of the structural schematic diagrams of the second transparent optical coating 32 in some other embodiments of the present application; Fig.11b This is one of the structural schematic diagrams of the second transparent optical coating 32 in some other embodiments of the present application; Fig.11c The present application is one of the structural schematic diagrams of the second transparent optical coating 32 in some other embodiments; this embodiment may include most of the technical features of the above embodiments, and the following mainly describes the difference between the two, and most of the same contents between the two will not be repeated.

[0124] The display panel 102 includes a light-emitting layer 20, a micron lens array layer 30, and a third transparent optical coating 40 which are stacked in sequence, and the micron lens array layer 30 includes a first transparent optical coating 31 and a second transparent optical coating 32, wherein the light-emitting layer 20, the micron lens array layer 30, the third transparent optical coating 40, and the first transparent optical coating 31 can be set with reference to the above embodiment, and will not be described in detail below. The main difference between this embodiment and the above embodiment is that the second transparent optical coating 32 is different in form.

[0125] See also Fig.11a In some embodiments, the second transparent optical coating 32 includes a top surface 321, a bottom surface 322, and a side surface 323 for connecting the top surface 321 and the bottom surface 322, wherein the top surface 321 is covered by the third transparent optical coating 40, the bottom surface 322 is opposite to the top surface 321 and is located on the side facing the light-emitting layer 20, and the side surface 323 is in contact with the first transparent optical coating 31 to form a first interface 301. It can be understood that the side surface 323 can be completely in contact with the first transparent optical coating 31, or part of the side surface 323 can be in contact with the first transparent optical coating 31. The top surface 321 and the bottom surface 322 are both planes, the side surface 323 is an arc surface, the top surface 321 and the bottom surface 322 are circular, and the center of the top surface 321 and the bottom surface 322 is the same, the area of ​​the top surface 321 is larger than the area of ​​the bottom surface 322, and along the first direction Z, from the bottom surface 322 to the top surface 321, the diameter of the side surface 323 gradually increases.

[0126] See also Fig.11bIn some embodiments, the second transparent optical coating 32 includes a top surface 321, a bottom surface 322, and a side surface 323 for connecting the top surface 321 and the bottom surface 322, wherein the top surface 321 is covered by the third transparent optical coating 40, the bottom surface 322 is opposite to the top surface 321 and is located on the side facing the light-emitting layer 20, and the side surface 323 contacts the first transparent optical coating 31 to form a first interface 301. The top surface 321 includes a middle area 3211 and an edge area 3212, wherein the middle area 3211 and the edge area 3212 can refer to the above embodiments and are not described here. The bottom surface 322 is a plane, and the side surface 323 is an arc surface, wherein along the first direction Z, from the bottom surface 322 to the top surface 321, the diameter of the side surface 323 gradually increases.

[0127] See also Fig.11c In some embodiments, the second transparent optical coating 32 includes a top surface 321, a bottom surface 322, and a side surface 323 for connecting the top surface 321 and the bottom surface 322, wherein the top surface 321 and the side surface 323 are both arc-shaped, and the bottom surface 322 is a plane to facilitate manufacturing. The second transparent optical coating 32 in this embodiment is convex lens-shaped as a whole, so that the second transparent optical coating 32 can produce better optical effects to improve the focusing effect.

[0128] Fig.12 is a schematic diagram of the structure of the display panel 102 in some other embodiments of the present application; Fig.13 for Fig.12 The reflectivity spectrum of the display panel 102 in the embodiment and the existing display panel 102. This embodiment may include most of the technical features of the above embodiment. The following mainly describes the difference between the two, and most of the same contents between the two are not repeated.

[0129] The display panel 102 includes a light-emitting layer 20, a micron lens array layer 30 and a third transparent optical coating 40 which are stacked in sequence, and the micron lens array layer 30 includes a first transparent optical coating 31 and a second transparent optical coating 32, wherein the light-emitting layer 20, the micron lens array layer 30, the third transparent optical coating 40 and the first transparent optical coating 31 can be set with reference to the above embodiment, and will not be described in detail below. The main difference between this embodiment and the above embodiment is that this embodiment also includes a color filter layer 50.

[0130] The display panel 102 further includes a color filter layer 50 disposed between the light emitting layer 20 and the micron lens array layer 30. The color filter layer 50 includes a black matrix 51 and a plurality of color resist units 52. The black matrix 51 is located between the plurality of color resist units 52. In the first direction Z, the black matrix 51 is disposed correspondingly to the first transparent optical coating 31, and the plurality of color resist units 52 are disposed one-to-one correspondingly to the plurality of second transparent optical coatings 32. Based on the fact that in the first direction Z, the black matrix 51 is disposed correspondingly to the first transparent optical coating 31, and the color resist units 52 are disposed one-to-one correspondingly to the second transparent optical coating 32, it is beneficial to improve the hue of light.

[0131] In some embodiments, the black matrix 51 is made of a black opaque material, and the light emitted by the sub-pixel 23 can only be emitted to the outside through the color resistance unit 52. The color resistance unit 52 is used to allow light of a specific wavelength to pass through, and the color resistance unit 52 includes a plurality of color resistance units, and is arranged in a one-to-one correspondence with the light-emitting units of the plurality of sub-pixels 23. Specifically, the color resistance unit 52 may include a red color resistance unit 52, a green color resistance unit 52, and a blue color resistance unit 52, and is arranged in a one-to-one correspondence with the R sub-pixel 23, the G sub-pixel 23, and the B sub-pixel 23.

[0132] The black matrix 51 is arranged around the color resist unit 52, and each of the two adjacent color resist units 52 is provided with a black matrix 51. In other words, the black matrix 51 is provided with a plurality of openings, each of which is provided with a color resist unit 52, and the color of the color resist unit corresponds to the luminous color of the sub-pixel 23 covered by it.

[0133] The color resist unit 52 may be a color film, and the red color resist unit 52, the green color resist unit 52 or the blue color resist unit 52 may be a red color film, a green color film or a blue color film respectively. The thickness of the color film may be 2 to 5 microns. The color film may be formed by a mature process such as spin coating or inkjet printing.

[0134] The thickness of the black matrix 51 can be 1.5 to 5 microns. The area ratio of the black matrix 51 in the filter layer is greater than 50%, for example, 75% to 85%. The thickness of the black matrix 51 can be the same as the thickness of the color resist unit 52, or different from the thickness of the color resist unit 52.

[0135] In some embodiments, the vertical projection of the edge of the second transparent optical coating 32 on the color filter layer 50 is located inside the color resist unit 52. Since the vertical projection of the edge of the second transparent optical coating 32 on the color filter layer 50 is located inside the color resist unit 52, but not at the position corresponding to the black matrix 51, the area of ​​the second interface 302 (refer to the previous embodiment) is increased, thereby reducing the overall reflectivity of the display panel 102 and improving the light transmittance.

[0136] Reference Fig.13Through the simulated reflectivity spectrum, it can be known that compared with the display panel 102 in the prior art, the display panel 102 in this embodiment can significantly reduce the reflectivity and improve the contrast of the bright display image of the outdoor display panel 102, thereby reducing power consumption and bringing 10-12% power consumption benefits.

[0137] In some embodiments, the display panel 102 further includes a fourth transparent optical coating 60, which is stacked on the side of the black matrix 51 and the color resist unit 52 away from the light emitting layer 20, and the first transparent optical coating 31 and the second transparent optical coating 32 are formed on the fourth transparent optical coating 60. Since the first transparent optical coating 31 and the second transparent optical coating 32 are formed on the fourth transparent optical coating 60, the fourth transparent optical coating 60 can improve the flatness of the surface, and facilitate the manufacturing process.

[0138] In some embodiments, the material of the fourth transparent optical coating 60 can be composed of a material with high light transmittance, such as optical overcoat or optically clear adhesive (OCA). Optical adhesive is a double-sided bonding tape without a matrix material, and has the characteristics of colorless transparency, high light transmittance (total light transmittance>99%), high adhesion, high temperature resistance, UV resistance, etc., and has a controlled thickness, can provide uniform spacing, and will not cause yellowing, peeling and deterioration problems after long-term use.

[0139] The fourth transparent optical coating 60 may also be made of at least one material selected from acrylic resin, epoxy resin, phenolic resin, polyurethane, polyamide resin, polyimide resin, unsaturated polyester, and the like.

[0140] In some embodiments, the refractive index of the fourth transparent optical coating 60 is lower than the refractive index of the second transparent optical coating 32 . For example, the refractive index of the fourth transparent optical coating 60 may be 1.47-1.5.

[0141] In some embodiments, the color filter layer 50 is located between the light emitting layer 20 and the micron lens array layer 30 , and the color filter layer 50 is located between the encapsulation layer 26 and the micron lens array layer 30 .

[0142] Fig.14 is a schematic diagram of the structure of the display panel 102 in some other embodiments of the present application; Fig.15 for Fig.14 The transmittance spectrum of the display panel 102 is compared with the conventional display panel 102 .

[0143] This embodiment may include most of the technical features of the above embodiments. The following mainly describes the difference between the two embodiments, and most of the same contents between the two embodiments will not be repeated.

[0144] The display panel 102 includes a light-emitting layer 20, a micron lens array layer 30, and a third transparent optical coating 40 which are stacked in sequence, and the micron lens array layer 30 includes a first transparent optical coating 31 and a second transparent optical coating 32, wherein the light-emitting layer 20, the micron lens array layer 30, the third transparent optical coating 40, and the first transparent optical coating 31 can be set with reference to the above embodiment, and will not be described in detail below. The main difference between this embodiment and the above embodiment is that this embodiment also includes a polarizer 70. The polarizer 70 uses the principle of polarized light, which can effectively reduce the reflection intensity of the external ambient light on the screen.

[0145] In some embodiments, the polarizer 70 is located on the side of the micron lens array layer 30 away from the light emitting layer 20. The display panel 102 in this embodiment adopts a solution of combining the polarizer 70 with the micron lens array layer 30, which can improve the transmittance of the display panel 102 in this embodiment. Fig.15 As shown, in the simulation model, the total transmittance of the Pattern area is 1.2%. After adopting the new structure, the total transmittance of the Pattern area is 1.3%, which is relatively improved by 8.3% (the specific calculation formula is: (1.3-1.2) / 1.2). The transmittance of the display panel 102 in this embodiment can be relatively improved by 8.3% compared with the prior art. Thereby, the sensing effect of the light sensor of the display panel 102 can be improved.

[0146] It is understandable that the optical sensor mentioned above may include not only a fingerprint recognition sensor. The optical sensor in this embodiment may include a light sensor for detecting the brightness of the surrounding environment and automatically adjusting the screen brightness to save power. The optical sensor may also include a distance sensor that detects the distance between the mobile phone and the user through technologies such as infrared or laser beams, and is used for functions such as automatically turning off the screen or adjusting the call volume. The optical sensor may also include a face recognition sensor and a heart rate sensor.

[0147] The above is only a specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any changes or substitutions that can be easily thought of by a person skilled in the art within the technical scope disclosed by the present invention should be included in the protection scope of the present invention. Therefore, the protection scope of the present invention should be based on the protection scope of the claims.

Claims

1. A display panel, characterized in that: The display panel comprises a light emitting layer, a micron lens array layer and a third transparent optical coating layer which are sequentially stacked along a first direction; The light emitting layer includes a plurality of sub-pixels and a pixel defining layer connected between the plurality of sub-pixels; The micron lens array layer includes a first transparent optical coating and a plurality of second transparent optical coatings, the first transparent optical coating is connected between the plurality of second transparent optical coatings, the refractive index of each of the second transparent optical coatings is greater than the refractive index of the first transparent optical coating, the first transparent optical coating and the pixel defining layer are arranged correspondingly in the first direction, and the plurality of second transparent optical coatings and the plurality of sub-pixels are arranged one-to-one in the first direction; The third transparent optical coating is attached to the surface of the first transparent optical coating and the surfaces of the plurality of second transparent optical coatings; The first transparent optical coating includes a first edge portion, the first edge portion and the second transparent optical coating are bonded to form a first interface, a second interface is formed between the first transparent optical coating and the third transparent optical coating, the reflectivity of the first interface is greater than the reflectivity of the second interface, and the first edge portion is located on the side of the first interface facing the light-emitting layer.

2. The display panel according to claim 1, characterized in that: Each of the second transparent optical coatings includes a top surface, a bottom surface, and a side surface connected between the top surface and the bottom surface, the top surface is the surface where the second transparent optical coating and the third transparent optical coating are bonded, the bottom surface is the surface of the second transparent optical coating facing the light-emitting layer, the side surface is bonded with the first transparent optical coating to form the first interface, the size of the top surface in the second direction is greater than the size of the bottom surface in the second direction, and the second direction is perpendicular to the first direction.

3. The display panel according to claim 2, characterized in that: The tangent line on the side surface is arranged at a preset angle with the first direction.

4. The display panel according to claim 2 or 3, characterized in that: The top surface includes a middle area and an edge area located at the periphery of the middle area, the edge area is connected between the middle area and the first transparent optical coating, a third interface is formed between the edge area and the third transparent optical coating, and the reflectivity of the third interface is greater than the reflectivity of the second interface.

5. The display panel according to any one of claims 2 to 4, characterized in that: A vertical projection of an edge of the top surface on the light emitting layer is located inside the pixel defining layer.

6. The display panel according to any one of claims 1 to 5, characterized in that: The display panel also includes a color film layer arranged between the light-emitting layer and the micron lens array layer, the color film layer includes a black matrix and a plurality of color resist units, the black matrix is ​​located between the plurality of color resist units, and in the first direction, the black matrix is ​​arranged corresponding to the first transparent optical coating, and the plurality of color resist units are arranged one-to-one corresponding to the plurality of second transparent optical coatings.

7. The display panel according to claim 6, characterized in that: The vertical projection of the edge of the second transparent optical coating on the color filter layer is located inside the color resist unit.

8. The display panel according to claim 6 or 7, characterized in that: The display panel further includes a fourth transparent optical coating layer, which is stacked on a side of the black matrix and the color resistance unit away from the light-emitting layer, and the first transparent optical coating layer and the second transparent optical coating layer are formed on the fourth transparent optical coating layer.

9. The display panel according to any one of claims 1 to 8, characterized in that: The difference between the refractive index of the first transparent optical coating and the refractive index of the second transparent optical coating is greater than 0.2, and the difference between the refractive index of the first transparent optical coating and the refractive index of the third transparent optical coating is less than 0.

2.

10. The display panel according to any one of claims 1 to 9, characterized in that: The refractive index of the first transparent optical coating and the refractive index of the third transparent optical coating are both in a first range, which is less than 1.5, and the refractive index of the second transparent optical coating is in a second range, which is greater than 1.

7.

11. An electronic device, characterized in that: The invention comprises a housing and the display panel according to any one of claims 1 to 10, wherein the display panel is mounted on the housing.

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