Display panel and display device

Abstract

The application provides a display panel and a display device. A light emitting device layer includes a plurality of light emitting devices. An encapsulation layer is located on a side of the light emitting device layer away from a substrate. A first insulating layer is located on a side of the encapsulation layer away from the substrate. The first insulating layer has a first refractive index. A second insulating layer is located on a side of the first insulating layer away from the substrate. The second insulating layer has a second refractive index. A high-refractive insulating layer is located on a side of the first insulating layer away from the substrate. The high-refractive insulating layer has a third refractive index. A reflective structure is located between the encapsulation layer and the first insulating layer. A surface of the reflective structure away from the substrate is a first surface. The first surface is inclined relative to a plane in which the substrate is located. A normal projection of the reflective structure on the substrate surrounds a normal projection of the light emitting device on the substrate. The second refractive index is less than the first refractive index, and the third refractive index is greater than the first refractive index. The application can reflect total reflection light in the display panel back into the air, and can improve the light extraction efficiency of the display panel.

Description

Technical Field

[0001] This application relates to the field of display technology, and in particular to a display panel and display device. Background Technology

[0002] As display devices are increasingly used in daily life, people's demands for them are also rising. In the field of display technology, improving the light extraction efficiency and reducing power consumption of display devices has become a key focus of current market research. Summary of the Invention

[0003] In view of this, embodiments of this application provide a display panel and a display device to solve the above problems.

[0004] In a first aspect, embodiments of this application provide a display panel, including a substrate, a light-emitting device layer, an encapsulation layer, a first insulating layer, a second insulating layer, a high-refractive-index insulating layer, and a reflective structure. The light-emitting device layer is located on one side of the substrate and includes a plurality of light-emitting devices. The encapsulation layer is located on the side of the light-emitting device layer away from the substrate. The first insulating layer is located on the side of the encapsulation layer away from the substrate, and the refractive index of the first insulating layer is the first refractive index. The second insulating layer is located on the side of the first insulating layer away from the substrate, and the refractive index of the second insulating layer is the second refractive index. The high-refractive-index insulating layer is located on the side of the first insulating layer away from the substrate, and the refractive index of the high-refractive-index insulating layer is the third refractive index. The reflective structure is located between the encapsulation layer and the first insulating layer. The surface of the reflective structure away from the substrate is the first surface. The first surface is inclined relative to the plane on which the substrate is located. The orthogonal projection of the reflective structure on the substrate surrounds the orthogonal projection of the light-emitting device on the substrate. The second refractive index is less than the first refractive index, and the third refractive index is greater than the first refractive index.

[0005] Secondly, based on the same inventive concept, embodiments of this application provide a display device, including the display panel as provided in the first aspect.

[0006] In this embodiment, a high-refractive-index insulating layer with a larger refractive index is provided, located on the side of the first insulating layer away from the substrate. When light emitted from the light-emitting device travels from the first insulating layer to the high-refractive-index insulating layer, the higher refractive index of the high-refractive-index insulating layer prevents total internal reflection of the light from the first insulating layer. This allows more light from the first insulating layer to enter the high-refractive-index insulating layer. When the light from the high-refractive-index insulating layer undergoes total internal reflection and travels into the display panel, the high-refractive-index insulating layer, with its height and distance from the light-emitting device layer relative to the first insulating layer, deflects the totally internally reflected light onto the reflective structure surrounding the light-emitting device. Furthermore, the high-refractive-index insulating layer increases the distance between the second insulating layer and the light-emitting device layer, further deflecting the totally internally reflected light from the second insulating layer onto the reflective structure surrounding the light-emitting device. This allows the inclined first surface of the reflective structure to reflect these totally internally reflected rays into the air, thereby improving the light extraction efficiency of the light-emitting device and reducing the power consumption of the display panel.

[0007] When light emitted from the light-emitting device travels from the second insulating layer to the high-refractive-index insulating layer, the higher refractive index of the high-refractive-index insulating layer prevents total internal reflection of the light from the second insulating layer. This allows more light from the second insulating layer to enter the high-refractive-index insulating layer. When the light from the high-refractive-index insulating layer undergoes total internal reflection and travels into the display panel, its height and distance from the light-emitting device layer relative to the second insulating layer make it possible for the reflected light to be deflected onto the reflective structure surrounding the light-emitting device. This allows the inclined first surface of the reflective structure to reflect the reflected light into the air, thereby improving the light extraction efficiency of the light-emitting device and reducing the power consumption of the display panel. Attached Figure Description

[0008] To more clearly illustrate the technical solutions of the embodiments of this application, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0009] Figure 1 This is a schematic diagram of the structure of a display panel in related technologies; Figure 2 This is a schematic diagram of the structure of a display panel provided in an embodiment of this application; Figure 3 This is a schematic diagram of the structure of another display panel provided in an embodiment of this application; Figure 4 This is a schematic diagram of the structure of another display panel provided in an embodiment of this application; Figure 5 This is a schematic diagram of the structure of another display panel provided in an embodiment of this application; Figure 6 This is a plan view of a display panel provided in an embodiment of this application; Figure 7 This is an enlarged schematic diagram of a partial structure of a display panel provided in an embodiment of this application; Figure 8 This is a schematic diagram of a display device provided in an embodiment of this application. Detailed Implementation

[0010] To better understand the technical solution of this application, the embodiments of this application will be described in detail below with reference to the accompanying drawings.

[0011] It should be understood that the described embodiments are merely some, not all, of the embodiments in this application. All other embodiments obtained by those skilled in the art based on the embodiments in this application without inventive effort are within the scope of protection of this application.

[0012] The terminology used in the embodiments of this application is for the purpose of describing particular embodiments only and is not intended to be limiting of this application. The singular forms “a,” “the,” and “the” used in the embodiments of this application and the appended claims are also intended to include the plural forms unless the context clearly indicates otherwise.

[0013] It should be understood that the term "and / or" used in this article is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, or B existing alone. Furthermore, the character " / " in this article generally indicates that the related objects before and after it have an "or" relationship.

[0014] Various modifications and variations can be made to this application without departing from its spirit or scope, which will be apparent to those skilled in the art. Therefore, this application is intended to cover modifications and variations falling within the scope of the corresponding claims (the claimed technical solutions) and their equivalents. It should be noted that the implementation methods provided in the embodiments of this application can be combined with each other without contradiction.

[0015] Figure 1 This is a schematic diagram of the structure of a display panel in related technologies.

[0016] In related technologies, such as Figure 1As shown, the display panel 01' includes a substrate 10', a light-emitting device layer 20', an encapsulation layer 30', a first insulating layer 40', and a second insulating layer 50'. The light-emitting device layer 20' is located on one side of the substrate 10' and includes a plurality of light-emitting devices 21'.

[0017] The encapsulation layer 30' is located on the side of the light-emitting device layer 20' away from the substrate 10'. The encapsulation layer 30' is used to isolate external water and oxygen, and can protect the device between the encapsulation layer 30' and the substrate 10' from water and oxygen corrosion.

[0018] The first insulating layer 40' is located on the side of the encapsulation layer 30' away from the substrate 10', and the second insulating layer 50' is located on the side of the first insulating layer 40' away from the substrate 10'. One side of the second insulating layer 50' can be attached to the first insulating layer 40', and the other side can be in contact with air.

[0019] The refractive index of the first insulating layer 40' is greater than that of the second insulating layer 50', and the refractive index of the second insulating layer 50' is greater than that of air.

[0020] The inventors of this application have discovered through research that, in related technologies, the light emitted from the light-emitting device 21' needs to pass through the encapsulation layer 30', the first insulating layer 40', and the second insulating layer 50' before exiting into the air. Since the refractive index of the first insulating layer 40' is greater than that of the second insulating layer 50', when the light L1' emitted from the light-emitting device 21' reaches the interface of the second insulating layer 50', if the incident angle of the light L1' is greater than the critical angle, then the light L1' cannot enter the second insulating layer 50' and will be totally reflected into the display panel 01', thus failing to exit into the air, resulting in a reduction in the light emission efficiency of the display panel 01'.

[0021] Meanwhile, since the refractive index of the second insulating layer 50' is greater than that of air, when the light L2' emitted from the light-emitting device 21' reaches the interface between the second insulating layer 50' and the air, if the incident angle of the light L2' is greater than the critical angle, the light L2' cannot enter the air and will be totally reflected into the display panel 01', further reducing the light emission efficiency of the display panel 01'.

[0022] In view of this, embodiments of this application provide a solution to address the problems in the related art.

[0023] Figure 2 This is a schematic diagram of the structure of a display panel provided in an embodiment of this application.

[0024] This application embodiment provides a display panel 01, such as Figure 2As shown, the display panel 01 includes a substrate 10, a light-emitting device layer 20, an encapsulation layer 30, a first insulating layer 40, a second insulating layer 50, and a high-refractive-index insulating layer 60. The light-emitting device layer 20 is located on one side of the substrate 10 and includes a plurality of light-emitting devices 21. The light-emitting devices 21 can be any one of organic light-emitting diodes (OLEDs), light-emitting diodes (LEDs), mini-LEDs, and micro-LEDs. This application does not make any specific limitation.

[0025] The encapsulation layer 30 is located on the side of the light-emitting device layer 20 away from the substrate 10. The encapsulation layer 30 can isolate external water and oxygen and is used to protect the devices and traces between the encapsulation layer 30 and the substrate 10 from water and oxygen corrosion.

[0026] The first insulating layer 40 is located on the side of the encapsulation layer 30 away from the substrate 10, and the refractive index of the first insulating layer 40 is the first refractive index n1. The second insulating layer 50 is located on the side of the first insulating layer 40 away from the substrate 10, and the refractive index of the second insulating layer 50 is the second refractive index n2. The high-refractive-index insulating layer 60 is located on the side of the first insulating layer 40 away from the substrate 10, and the refractive index of the high-refractive-index insulating layer 60 is the third refractive index n3.

[0027] The display panel 01 also includes a reflective structure 70, which is located between the encapsulation layer 30 and the first insulating layer 40. The surface of the reflective structure 70 away from the substrate is a first surface 71, which is inclined relative to the plane of the substrate 10. The orthographic projection of the reflective structure 70 onto the substrate 10 surrounds the orthographic projection of the light-emitting device 21 onto the substrate 10. That is, in the direction perpendicular to the plane of the substrate 10, the reflective structure 70 and the light-emitting device 21 do not overlap, and the reflective structure 70 is arranged around the light-emitting device 21.

[0028] In this equation, the second refractive index n2 is less than the first refractive index n1, and the third refractive index n3 is greater than the first refractive index n1. That is, n3 > n1 > n2.

[0029] In this embodiment, a high-refractive-index insulating layer 60 is provided, located on the side of the first insulating layer 40 away from the substrate 10. When the light emitted from the light-emitting device 21 travels from the first insulating layer 40 to the high-refractive-index insulating layer 60, the higher refractive index of the high-refractive-index insulating layer 60 prevents total internal reflection of the light from the first insulating layer 40. This allows more light from the first insulating layer 40 to enter the high-refractive-index insulating layer 60. When the light from the high-refractive-index insulating layer 60 undergoes total internal reflection and enters the display panel 01, the high-refractive-index insulating layer 60 has a certain height, preventing total internal reflection. Since the high-refractive-index insulating layer 60 is farther away from the light-emitting device layer 20 than the first insulating layer 40, it is possible for the light rays that undergo total internal reflection in the high-refractive-index insulating layer 60 to be deflected onto the reflective structure 70 surrounding the light-emitting device 21. At the same time, due to the setting of the high-refractive-index insulating layer 60, the distance between the second insulating layer 50 and the light-emitting device layer 20 can be increased. Therefore, it is also possible for the light rays that undergo total internal reflection in the second insulating layer 50 to be deflected onto the reflective structure 70 surrounding the light-emitting device 21. This facilitates the reflection of these total internally reflected rays into the air by utilizing the inclined first surface 71 in the reflective structure 70, thereby improving the light extraction efficiency of the light-emitting device 21 and reducing the power consumption of the display panel 01.

[0030] When the light emitted from the light-emitting device 21 travels from the second insulating layer 50 to the high-refractive-index insulating layer 60, the higher refractive index of the high-refractive-index insulating layer 60 prevents total internal reflection of the light emitted from the second insulating layer 50. This allows more light from the second insulating layer 50 to enter the high-refractive-index insulating layer 60. When the light emitted from the high-refractive-index insulating layer 60 undergoes total internal reflection and travels into the display panel 01, the high-refractive-index insulating layer 60 has a certain height and is farther away from the light-emitting device layer 20 relative to the second insulating layer 50. This makes it possible for the totally internally reflected light in the high-refractive-index insulating layer 60 to be deflected onto the reflective structure 70 surrounding the light-emitting device 21. This allows the inclined first surface 71 of the reflective structure 70 to reflect these totally internally reflected rays into the air, thereby improving the light emission efficiency of the light-emitting device 21 and reducing the power consumption of the display panel 01.

[0031] Compared with the display panel 01' in related technologies, the display panel 01 provided in this application has higher brightness with the same power consumption and lifespan. With the same brightness, it has lower power consumption and a longer lifespan. The display panel 01 provided in this application can simultaneously achieve the characteristics of high brightness, low power consumption, and long lifespan.

[0032] For example, such as Figure 2As shown, the high-refractive-index insulating layer 60 is located between the first insulating layer 40 and the second insulating layer 50. The high-refractive-index insulating layer 60 can be attached to the surface of the first insulating layer 40 away from the substrate 10, and the second insulating layer 50 is attached to the surface of the high-refractive-index insulating layer 60 away from the substrate 10.

[0033] Based on this configuration, the light emitted from the light-emitting device 21 can enter the high-refractive-index insulating layer 60 through the first insulating layer 40, and the light in the high-refractive-index insulating layer 60 can then be directed towards the second insulating layer 50. Thus, as the aforementioned analysis shows, the light in the first insulating layer 40 does not undergo total internal reflection when it strikes the high-refractive-index insulating layer 60, allowing a significant amount to enter the high-refractive-index insulating layer 60. The light that undergoes total internal reflection in the high-refractive-index insulating layer 60, as well as the light that undergoes total internal reflection in the second insulating layer 50, can be deflected onto the reflective structure 70 surrounding the light-emitting device 21 and reflected into the air by the inclined first surface 71 of the reflective structure 70, thereby improving the light emission efficiency of the light-emitting device 21.

[0034] For example, such as Figure 3 As shown, Figure 3 This is a schematic diagram of the structure of another display panel provided in an embodiment of this application. The high-refractive-index insulating layer 60 is located on one side of the second insulating layer 50, and the high-refractive-index insulating layer 60 can be attached to the surface of the second insulating layer 50 away from the substrate 10.

[0035] Based on this configuration, the light emitted from the light-emitting device 21 can travel from the second insulating layer 50 to the high-refractive-index insulating layer 60. Thus, as the aforementioned analysis shows, the light in the second insulating layer 50 will not undergo total internal reflection when it reaches the high-refractive-index insulating layer 60, allowing more light to enter the high-refractive-index insulating layer 60. The light that does undergo total internal reflection in the high-refractive-index insulating layer 60 can be deflected onto the reflective structure 70 surrounding the light-emitting device 21 and reflected into the air by the inclined first surface 71 of the reflective structure 70, thereby improving the light emission efficiency of the light-emitting device 21.

[0036] Optionally, the reflective structure 70 includes at least one of a metal and indium tin oxide. The metal material can be at least one of aluminum, silver, and copper. This is beneficial for improving the reflection effect of the reflective structure 70 on the total internal reflection of light incident on it, thereby further improving the light extraction efficiency of the light-emitting device 21.

[0037] In one embodiment of this application, such as Figure 2 As shown, the orthographic projection of the first surface 71 of the reflective structure 70 onto the substrate 10 surrounds the orthographic projection of the light-emitting device 21 onto the substrate 10. Along the direction Z from the substrate 10 to the light-emitting device 21, the first surface 71 is tilted away from the light-emitting device 21 it surrounds.

[0038] In other words, in the reflective structure 70 surrounding the same light-emitting device 21, the distance S1 between the side of the first surface 71 away from the light-emitting device 21 and the substrate 10 is greater than the distance S2 between the side of the first surface 71 close to the light-emitting device 21 and the substrate 10.

[0039] In this embodiment, along the direction Z from the substrate 10 to the light-emitting device 21, the first surface 71 is tilted away from the light-emitting device 21 it surrounds. Then, when the totally internally reflected light L enters the first surface 71, as... Figure 2 As shown, the first surface 71 can reflect the total internal reflection light L into the air at a smaller angle, which improves the light emission efficiency of the light-emitting device 21 and also helps to increase the brightness of the display panel 01 at the viewing angle, thereby improving the display effect.

[0040] Please continue to refer to this. Figure 2 and Figure 3 In one embodiment of this application, the surface of the encapsulation layer 30 away from the substrate 10 is a second surface 301, and the second surface 301 includes a first inclined surface 301A, and the reflective structure 70 is disposed on the first inclined surface 301A.

[0041] During the fabrication of the display panel 01, reflective material can be directly coated onto the first inclined surface 301A to form a reflective structure 70.

[0042] In this embodiment of the application, the second surface 301 of the encapsulation layer 30 includes a first inclined surface 301A, and the reflective structure 70 is disposed on the first inclined surface 301A. This is beneficial to achieve the inclination of the reflective structure 70, and thus to achieve the reflection of total internal reflection light into the inclined reflective structure 70 and then into the air.

[0043] Meanwhile, by setting the reflective structure 70 on the second surface 301 of the encapsulation layer 30, there is no need to set an additional film layer to support the reflective structure 70 in the display panel 01. This helps to avoid excessively increasing the thickness of the display panel 01, thereby facilitating the thinning of the display panel 01.

[0044] For example, such as Figure 4 As shown, Figure 4 This is a schematic diagram of the structure of another display panel provided in an embodiment of this application. The encapsulation layer 30 includes a first inorganic layer 31, a first organic layer 32, and a second inorganic layer 33. The first organic layer 32 is located between the first inorganic layer 31 and the second inorganic layer 33, and the second inorganic layer 33 is located on the side of the first inorganic layer 31 away from the substrate 10.

[0045] The second surface 301 of the encapsulation layer 30 is the surface of the second inorganic layer 33 away from the substrate 10. That is, the reflective structure 70 can be disposed on the surface of the second inorganic layer 33 away from the substrate 10.

[0046] Based on this configuration, the reflective structure 70 will not affect the internal structure of the encapsulation layer 30, which helps to ensure the structural stability of the encapsulation layer 30.

[0047] Furthermore, such as Figure 4 As shown, the second inorganic layer 33 includes multiple first portions 33A and multiple second portions 33B. The second portions 33B surround the first portions 33A, and the second portions 33B and the first portions 33A can be connected. Along a direction perpendicular to the plane of the substrate 10, the first portions 33A overlap with the light-emitting device 21, while the second portions 33B do not overlap with the light-emitting device 21. That is, the orthographic projection of the second portions 33B on the substrate 10 can surround the orthographic projection of the light-emitting device 21 on the substrate 10.

[0048] The maximum thickness G2 of the second part 33B is greater than the maximum thickness G1 of the first part 33A.

[0049] Based on this configuration, there is a certain height difference between the second part 33B and the first part 33A. The surface of the second part 33B near the first part 33A can be an inclined surface, which is beneficial to make the surface of the second inorganic layer 33 away from the substrate 10 include the first inclined surface 301A, thereby facilitating the tilting of the reflective structure 70 on the first inclined surface 301A.

[0050] In one embodiment of this application, please continue to refer to Figures 2-4 The display panel 01 also includes a first buffer layer 80, which is located between the reflective structure 70 film layer and the first insulating layer 40. The surface of the first buffer layer 80 away from the substrate 10 is planar.

[0051] Optional, such as Figures 2-4 As shown, the first buffer layer 80 is attached to the encapsulation layer 30 and the reflective structure 70, and the first insulating layer 40 is attached to the first buffer layer 80.

[0052] In this embodiment, the first buffer layer 80 is located between the film layer containing the reflective structure 70 and the first insulating layer 40, and the surface of the first buffer layer 80 away from the substrate 10 is flat. This allows the first buffer layer 80 to fill the height difference between the first portion 33A and the second portion 33B in the second inorganic layer 33, providing a flat substrate and improving the reliability of subsequent film layer preparation.

[0053] For example, such as Figure 5 As shown, Figure 5This is a schematic diagram of another display panel structure provided in an embodiment of this application. The display panel 01 further includes a first touch metal layer TP1 and a second touch metal layer TP2. The first touch metal layer TP1 is located between the first insulating layer 40 and the first buffer layer 80, and the second touch metal layer TP2 is located between the first insulating layer 40 and the second insulating layer 50. The first touch metal layer TP1 can be attached to the surface of the first buffer layer 80 away from the substrate 10, and the second touch metal layer TP2 can be attached to the surface of the first insulating layer 40 away from the substrate 10.

[0054] Since the surface of the first buffer layer 80 away from the substrate 10 is planar, the first touch metal layer TP1 and the second touch metal layer TP2, etc., prepared after the first buffer layer 80, can be prepared on a relatively flat substrate, which helps to avoid poor preparation of the first touch metal layer TP1 and the second touch metal layer TP2.

[0055] Meanwhile, by positioning the first insulating layer 40 between the first touch metal layer TP1 and the second touch metal layer TP2, the metal in the first touch metal layer TP1 can be isolated from the metal in the second touch metal layer TP2, thus preventing short circuits. Of course, when a portion of the metal in the first touch metal layer TP1 and a portion of the metal in the second touch metal layer TP2 needs to be electrically connected, the two can be electrically connected by drilling holes in the first insulating layer 40.

[0056] For example, combining Figure 5 and Figure 6 As shown, Figure 6 This is a planar schematic diagram of a display panel provided in an embodiment of this application. The display panel 01 includes a plurality of touch electrodes 90, among which there are first touch electrodes 91 and second touch electrodes 92. The first touch electrodes 91 extend along a first direction Y, and the plurality of first touch electrodes 91 are arranged along a second direction X. The second touch electrodes 92 extend along the second direction X, and the plurality of second touch electrodes 92 are arranged along the first direction Y.

[0057] For example, such as Figure 6 As shown, the first direction Y is the column direction in display panel 01, and the second direction X is the row direction in display panel 01. Each first touch electrode 91 includes a first main body portion 911 and a first connecting portion 912. Two adjacent first main body portions 911 are electrically connected through the first connecting portion 912. The first connecting portion 912 is located in the first touch metal layer TP1, and the first main body portion 911 is located in the second touch metal layer TP2. The second touch electrode 92 is located in the second touch metal layer TP2. Along a direction perpendicular to the plane of the substrate 10, the second touch electrode 92 overlaps with the first connecting portion 912 of the first touch electrode 91. The driver chip can determine the touch position by detecting the mutual capacitance between the first touch electrode 91 and the second touch electrode 92.

[0058] The first main body 911 and the first connecting part 912 can be electrically connected by drilling holes in the first insulating layer 40.

[0059] Figure 7 This is an enlarged schematic diagram of a partial structure of a display panel provided in an embodiment of this application.

[0060] In one embodiment of this application, such as Figure 7 As shown, the high-refractive-index insulating layer 60 is located between the first insulating layer 40 and the second insulating layer 50. The first refractive index is n1, the second refractive index is n2, and the third refractive index is n3. The angle between the first surface 71 of the reflective structure 70 and the plane containing the substrate 10 is θ. The angle θ is the acute angle between the first surface 71 and the plane containing the substrate 10.

[0061] in, .

[0062] In this embodiment of the application, the following settings are provided: This is beneficial because after the total internal reflection light hits the reflective structure 70, it can be reflected into the air by the reflective structure 70, thereby ensuring that the light output efficiency of the light-emitting device 21 can be improved.

[0063] To facilitate understanding of the technical solution of this application, the following will be used as an example. Figure 7 Taking the structure of the display panel shown as an example, the process of total internal reflection of light in the high-refractive insulating layer 60 in this application being reflected into the air by the reflective structure 70 will be explained. To simplify the calculation process, the angular change of light in the display panel 01 due to refraction is ignored.

[0064] like Figure 7As shown, the high-refractive-index insulating layer 60 is located on the surface of the first insulating layer 40 away from the substrate 10, and the second insulating layer 50 is located on the surface of the high-refractive-index insulating layer 60 away from the substrate 10. Assuming there is no high-refractive-index insulating layer 60 in the display panel, the second insulating layer 50 would be located on the surface of the first insulating layer 40 away from the substrate 10. Since the refractive index n1 of the first insulating layer 40 is greater than the refractive index n2 of the second insulating layer 50, total internal reflection will occur when light from the first insulating layer 40 strikes the second insulating layer 50. Assuming the critical angle for total internal reflection in the first insulating layer 40 is θ1, then... .

[0065] In order for the totally internally reflected light in the first insulating layer 40 to be emitted, such as Figure 7 As shown, a high-refractive-index insulating layer 60 is provided between the first insulating layer 40 and the second insulating layer 50. Since the refractive index n3 of the high-refractive-index insulating layer 60 is greater than the refractive index n1 of the first insulating layer 40, the light rays that would normally undergo total internal reflection in the first insulating layer 40 can exit into the high-refractive-index insulating layer 60. Assuming that the incident angle of the light rays that would normally undergo total internal reflection in the first insulating layer 40 is α, where α > θ1, the light ray L1 with an incident angle of α can enter the high-refractive-index insulating layer 60 without changing the incident angle.

[0066] Since the refractive index n3 of the high-refractive-index insulating layer 60 is greater than the refractive index n2 of the second insulating layer 50, total internal reflection will occur when light rays from the high-refractive-index insulating layer 60 strike the second insulating layer 50. Assuming the critical angle for total internal reflection in the high-refractive-index insulating layer 60 is θ2, then... Since n3 > n1 > n2, θ2 < θ1. Therefore, in the high-refractive-index insulating layer 60, the ray L1 with an incident angle of α will undergo total internal reflection. Let's assume the totally internalized ray is L2.

[0067] Assuming the normal to the plane containing the substrate 10 is the first normal F1, and the normal to the first surface 71 in the reflective structure 70 is the second normal F2, since the first normal F1 is perpendicular to the plane containing the substrate 10 and the second normal F2 is perpendicular to the first surface 71, the angle between the first normal F1 and the second normal F2 is also θ.

[0068] Ignoring the angle change of the totally internalized ray L2 as it travels toward the reflecting structure 70, the incident angle of the totally internalized ray L2 into the reflecting structure 70 is α-θ, and the reflection angle is also α-θ. That is, the angle between the ray L3 after the totally internalized ray L2 is reflected by the reflecting structure 70 and the second normal F2 is α-θ, and the angle between the ray L3 and the first normal F1 is α-2θ.

[0069] To ensure that light ray L3 can exit into the air, α - 2θ < θ2 must be set, meaning the angle of incidence of light ray L3 in the high-refractive-index insulating layer 60 needs to be less than the critical angle. Since the minimum value of α is θ1, therefore θ > (θ1 - θ2) / 2, i.e. In this way, the light that undergoes total internal reflection in the high-refractive-index insulating layer 60 can eventually be emitted into the air, improving the light emission efficiency of the display panel 01.

[0070] Optionally, 2≤n3≤2.5. In this way, while ensuring a high refractive index of the high-refractive-index insulating layer 60, a wider range of materials can be used as the high-refractive-index insulating layer 60, which helps to reduce the manufacturing difficulty of the display panel 01.

[0071] For example, the high-refractive-index insulating layer 60 includes at least one of titanium dioxide, zinc sulfide, and tantalum pentoxide.

[0072] Optionally, 1.5°≤θ≤8°. Since the reflective structure 70 can be disposed on the first inclined surface 301A of the second inorganic layer 33, the angle between the first inclined surface 301A and the plane containing the substrate 10 can be the same as θ. The first inclined surface 301A is located on the side of the second portion 33B of the second inorganic layer 33 closer to the first portion 33A. By setting 1.5°≤θ≤8°, while ensuring that the reflective structure 70 can reflect total internal reflection light into the air, the height difference between the second portion 33B and the first portion 33A in the second inorganic layer 33 will not be too large. This helps to avoid excessively increasing the thickness of the encapsulation layer 30, thereby facilitating the thinning of the display panel 01.

[0073] In one embodiment of this application, please continue to refer to Figure 2 The thickness of the high-refractive-index insulating layer 60 is H1, where 1μm≤H1≤2.5μm.

[0074] In this embodiment, the thickness of the high-refractive-index insulating layer 60 is set within a certain range. This is beneficial for the total internal reflection light in the high-refractive-index insulating layer 60 to be deflected toward the periphery of the light-emitting device 21. It is also beneficial for the total internal reflection light in the high-refractive-index insulating layer 60 to be deflected toward the periphery of the light-emitting device 21, so as to avoid the total internal reflection light being deflected too much and unable to enter the reflective structure 70. This is beneficial for the reflective structure 70 to reflect more total internal reflection light into the air, thereby ensuring the effect of improving the light emission efficiency of the light-emitting device 21.

[0075] At the same time, setting the thickness of the high-refractive-index insulating layer 60 within a certain range helps to avoid excessively increasing the thickness of the high-refractive-index insulating layer 60, which helps to ensure the thinness of the display panel 01.

[0076] In one embodiment of this application, such as Figure 2As shown, the distance between the orthographic projection of the reflective structure 70 on the substrate 10 and the orthographic projection of the light-emitting device 21 surrounding it on the substrate 10 is D, where D≥2μm.

[0077] In other words, the horizontal distance between the reflective structure 70 and the light-emitting device 21 it surrounds is not less than 2μm.

[0078] In this embodiment, the horizontal distance between the reflective structure 70 and the surrounding light-emitting device 21 is set to be no less than 2 μm. This improves the reliability of the non-overlapping relationship between the reflective structure 70 and the light-emitting device 21 in the direction perpendicular to the plane of the substrate 10, thereby preventing the reflective structure 70 from affecting the light emission of the light-emitting device 21. Furthermore, it ensures that a greater amount of total internally reflected light can be deflected onto the reflective structure 70 surrounding the light-emitting device 21, thus improving the light emission efficiency of the light-emitting device 21.

[0079] It should be noted that in the display panel 01 provided in this application embodiment, the thickness of the high-refractive insulating layer 60 can be set between 1μm and 2.5μm, and the horizontal distance between the reflective structure 70 and the light-emitting device 21 it surrounds is not less than 2μm, so as to ensure that the total internal reflection light can be deflected onto the reflective structure 70 to a greater extent.

[0080] Based on this, the refractive index of the high-refractive insulating layer 60 can be set to be between 2 and 2.5, and the angle between the first surface 71 of the reflective structure 70 and the plane of the substrate 10 can be between 1.5° and 8°, so that the reflective structure 70 can reflect more total internal reflection light into the air, thereby improving the light emission efficiency of the display panel 01.

[0081] Figure 8 This is a schematic diagram of a display device provided in an embodiment of this application.

[0082] This application provides a display device 02, such as... Figure 8 As shown, the display device 02 includes the display panel 01 provided in the above embodiments. Exemplarily, the display device 02 provided in the embodiments of this application can be an electronic device such as a mobile phone, computer, television, vehicle display, or wearable display, and this application does not make any specific limitations.

[0083] In the display device 02, a high-refractive-index insulating layer 60 is provided, located on the side of the first insulating layer 40 away from the substrate 10. When the light emitted from the light-emitting device 21 travels from the first insulating layer 40 to the high-refractive-index insulating layer 60, the higher refractive index of the high-refractive-index insulating layer 60 prevents total internal reflection of the light from the first insulating layer 40. This allows more light from the first insulating layer 40 to enter the high-refractive-index insulating layer 60. When the light from the high-refractive-index insulating layer 60 undergoes total internal reflection and enters the display panel 01, the high-refractive-index insulating layer 60 has a certain height, preventing total internal reflection. Since the high-refractive-index insulating layer 60 is farther away from the light-emitting device layer 20 than the first insulating layer 40, it is possible for the light rays that undergo total internal reflection in the high-refractive-index insulating layer 60 to be deflected onto the reflective structure 70 surrounding the light-emitting device 21. At the same time, due to the setting of the high-refractive-index insulating layer 60, the distance between the second insulating layer 50 and the light-emitting device layer 20 can be increased. Therefore, it is also possible for the light rays that undergo total internal reflection in the second insulating layer 50 to be deflected onto the reflective structure 70 surrounding the light-emitting device 21. This facilitates the reflection of these total internally reflected rays into the air by utilizing the inclined first surface 71 in the reflective structure 70, thereby improving the light extraction efficiency of the light-emitting device 21 and reducing the power consumption of the display device 02.

[0084] When the light emitted from the light-emitting device 21 travels from the second insulating layer 50 to the high-refractive-index insulating layer 60, the higher refractive index of the high-refractive-index insulating layer 60 prevents total internal reflection of the light emitted from the second insulating layer 50. This allows more light from the second insulating layer 50 to enter the high-refractive-index insulating layer 60. When the light emitted from the high-refractive-index insulating layer 60 undergoes total internal reflection and travels into the display panel 01, the high-refractive-index insulating layer 60 has a certain height and is farther from the light-emitting device layer 20 relative to the second insulating layer 50. This makes it possible for the totally internally reflected light in the high-refractive-index insulating layer 60 to be deflected onto the reflective structure 70 surrounding the light-emitting device 21. This allows the inclined first surface 71 of the reflective structure 70 to reflect these totally internally reflected rays into the air, thereby improving the light emission efficiency of the light-emitting device 21 and reducing the power consumption of the display device 02.

[0085] Compared with display devices in related technologies, the display device 02 provided in this application has higher brightness with the same power consumption and lifespan. With the same brightness, it has lower power consumption and a longer lifespan. The display device 02 provided in this application can simultaneously achieve the characteristics of high brightness, low power consumption, and long lifespan.

[0086] The above description is merely a preferred embodiment of this application and is not intended to limit this application. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the scope of protection of this application.

Claims

1. A display panel, characterized in that, include: Substrate; A light-emitting device layer is located on one side of the substrate, and the light-emitting device layer includes a plurality of light-emitting devices; An encapsulation layer is located on the side of the light-emitting device layer away from the substrate; A first insulating layer is located on the side of the encapsulation layer away from the substrate, and the refractive index of the first insulating layer is a first refractive index; A second insulating layer is located on the side of the first insulating layer away from the substrate, and the refractive index of the second insulating layer is a second refractive index; A high-refractive-index insulating layer is located on the side of the first insulating layer away from the substrate, and the high-refractive-index insulating layer has a third refractive index. A reflective structure is located between the encapsulation layer and the first insulating layer. The surface of the reflective structure away from the substrate is a first surface. The first surface is inclined relative to the plane where the substrate is located. The orthographic projection of the reflective structure on the substrate is around the orthographic projection of the light-emitting device on the substrate. Wherein, the second refractive index is less than the first refractive index, and the third refractive index is greater than the first refractive index.

2. The display panel according to claim 1, characterized in that, The first surface of the reflective structure is projected onto the substrate, and around the projection of the light-emitting device onto the substrate, in the direction from the substrate toward the light-emitting device, the first surface is tilted toward the side away from the light-emitting device it surrounds.

3. The display panel according to claim 1, characterized in that, The surface of the encapsulation layer away from the substrate is a second surface, and the second surface includes a first inclined surface. The reflective structure is disposed on the first inclined surface.

4. The display panel according to claim 3, characterized in that, The encapsulation layer includes a first inorganic layer, a first organic layer, and a second inorganic layer. The first organic layer is located between the first inorganic layer and the second inorganic layer, and the second inorganic layer is located on the side of the first inorganic layer away from the substrate. The second surface is the surface of the second inorganic layer away from the substrate.

5. The display panel according to claim 4, characterized in that, The second inorganic layer includes a plurality of first portions and a plurality of second portions. The second portions surround the first portions in a direction perpendicular to the plane of the substrate. The first portions overlap with the light-emitting device, while the second portions do not overlap with the light-emitting device. The maximum thickness of the second portion is greater than the maximum thickness of the first portion.

6. The display panel according to claim 1, characterized in that, The display panel includes a first buffer layer, which is located between the reflective structure film layer and the first insulating layer, and the surface of the first buffer layer away from the substrate is planar.

7. The display panel according to claim 6, characterized in that, The display panel further includes a first touch metal layer and a second touch metal layer, wherein the first touch metal layer is located between the first insulating layer and the first buffer layer, and the second touch metal layer is located between the first insulating layer and the second insulating layer.

8. The display panel according to claim 1, characterized in that, The high-refractive-index insulating layer is located between the first insulating layer and the second insulating layer.

9. The display panel according to claim 8, characterized in that, The first refractive index is n1, the second refractive index is n2, the third refractive index is n3, and the angle between the first surface and the plane containing the substrate is θ. 。 10. The display panel according to claim 9, characterized in that, 1.5°≤θ≤8°.

11. The display panel according to claim 9, characterized in that, 2≤n3≤2.5。 12. The display panel according to claim 1, characterized in that, The thickness of the high-refractive-index insulating layer is H1, where 1μm≤H1≤2.5μm.

13. The display panel according to claim 1, characterized in that, The distance between the orthographic projection of the reflective structure on the substrate and the orthographic projection of the light-emitting device it surrounds on the substrate is D, where D≥2μm.

14. The display panel according to claim 1, characterized in that, The reflective structure includes at least one of a metal and indium tin oxide.

15. The display panel according to claim 1, characterized in that, The high-refractive-index insulating layer is located on the side of the second insulating layer away from the substrate.

16. A display device, characterized in that, Includes the display panel as described in any one of claims 1-15.

Images