Display panel and display device

Abstract

The embodiment of the present application provides a display panel and a display device, wherein the display panel includes: a substrate; a light-emitting device layer, which is arranged on one side of the substrate; a light-transmitting structure, which is arranged on the side of the light-emitting device layer away from the substrate; a light-transmitting layer, which is arranged on the side of the light-emitting device layer away from the substrate and covers the light-transmitting structure; wherein the refractive index of the light-transmitting layer is greater than the refractive index of the light-transmitting structure. The embodiment of the present application converts light in a specific large viewing angle direction into a positive viewing angle direction by arranging the light-transmitting structure and the light-transmitting layer. In the case of removing the optical selection film, the function of the optical selection film is integrated into the display panel, and the light output efficiency of the display can also be increased, so as to increase the lifespan at the same brightness, thereby improving the quality of vehicle-mounted display products, reducing costs, and improving product competitiveness.

Description

Technical Field

[0001] The present application relates to the field of display technology, and more specifically, to a display panel and a display device. Background Art

[0002] As organic light-emitting diode (OLED) displays are widely used in consumer electronic products such as mobile phones, wearables, and narrowband Internet of Things (NB-IoT), OLED display technology is also developing rapidly. Based on the characteristics of OLED itself, such as better display quality and faster response speed, OLED display is gradually penetrating into display application fields such as in-vehicle display, which is also an area that OLED display needs to expand in the future. At present, luxury high-end brands have already launched cars equipped with OLED displays, and there is a trend of expanding to mid- and low-end vehicles. Different from the requirements of consumer electronic products for display modules, in-vehicle displays have special requirements for reliability and vehicle safety.

[0003] At present, the in-vehicle display is subdivided into central control display, instrument display and possible electronic rearview mirror in the future. For the sake of driving safety, the requirements for strictness increase in sequence. For the sake of driving safety, especially at night or in bad weather conditions, car manufacturers require that the in-vehicle display be attached with an optical selection film. The purpose is to limit the brightness in a certain direction, similar to the principle of anti-peep film, to avoid the display screen light reflecting through the windshield and side windows, affecting the driver's line of sight. However, after attaching the optical selection film, the overall brightness of the screen will be greatly reduced, by about 25%. If the brightness required by the customer needs to be achieved, the life of the electroluminescence (EL) device will be a huge challenge. OLED in-vehicle displays also need to take into account the requirements of long life.

[0004] In summary, the display panels in the prior art have the following technical problems: insufficient vehicle display reliability and vehicle safety, insufficient overall screen brightness, and insufficient life of the light-emitting devices. Summary of the invention

[0005] In view of the shortcomings of the existing methods, the present application proposes a display panel and a display device to solve the technical problems existing in the display panels of the prior art: insufficient reliability and vehicle safety of the in-vehicle display, insufficient overall screen brightness, and insufficient life of the light-emitting device.

[0006] In a first aspect, an embodiment of the present application provides a display panel, including:

[0007] substrate;

[0008] The light emitting device layer is arranged on one side of the substrate;

[0009] The light-transmitting structure is arranged on a side of the light-emitting device layer away from the substrate;

[0010] A light-transmitting layer is arranged on a side of the light-emitting device layer away from the substrate and covers the light-transmitting structure;

[0011] The refractive index of the light-transmitting layer is greater than the refractive index of the light-transmitting structure.

[0012] In some embodiments of the present application, the light-emitting device layer includes a light-emitting device and an encapsulation layer;

[0013] The light emitting device is arranged on a side of the substrate close to the light-transmitting layer;

[0014] The encapsulation layer covers the light emitting device, and the refractive index of the encapsulation layer is smaller than the refractive index of the light transmitting layer.

[0015] In some embodiments of the present application, the light-transmitting structure includes a first light-transmitting structure, at least two first light-transmitting structures are parallel and spaced apart along a first direction, and each first light-transmitting structure extends along a second direction, and the first direction and the second direction are staggered.

[0016] In some embodiments of the present application, the light emitting device layer includes a plurality of pixel units, each pixel unit includes: a first color light emitting device, a second color light emitting device, and a third color light emitting device;

[0017] The first light-transmitting structure is located at two opposite sides of the pixel unit in the first direction and between the first color light-emitting device and the second color light-emitting device.

[0018] In some embodiments of the present application, the display panel further includes a second light-transmitting structure, at least two second light-transmitting structures are parallel and arranged at intervals along the second direction, and each second light-transmitting structure extends along the first direction, and the first direction is perpendicular to the second direction.

[0019] In some embodiments of the present application, the light emitting device includes a plurality of pixel units, each pixel unit includes: a first light emitting device, a second light emitting device, and a third light emitting device;

[0020] The first light-transmitting structure is disposed on two opposite sides of the pixel unit in a first direction and between the first light-emitting device and the second light-emitting device, and the second light-transmitting structure is disposed on two opposite sides of the pixel unit in a second direction.

[0021] In some embodiments of the present application, a height of at least one first light-transmitting structure is greater than a height of at least one second light-transmitting structure.

[0022] In some embodiments of the present application, a refractive index of at least one first light-transmitting structure is smaller than a refractive index of at least one second light-transmitting structure.

[0023] In some embodiments of the present application, the orthographic projection of at least one of the first color light-emitting device, the second color light-emitting device and the third color light-emitting device on the substrate is a first orthographic projection, and the outline of the first orthographic projection is an axisymmetric polygon; the orthographic projection of the light-transmitting structure on the substrate is a second orthographic projection, and the second orthographic projection at least surrounds the opposite sides of the first orthographic projection in the first direction, and surrounds part of the side surfaces of the first orthographic projection in the second direction, and the second orthographic projection has at least one gap in the second direction.

[0024] In some embodiments of the present application, a cross section of the light-transmitting structure perpendicular to the substrate is trapezoidal, and a lower base of the trapezoid is located on a side close to the light-emitting device layer.

[0025] In some embodiments of the present application, a cross-sectional pattern of the light-transmitting structure perpendicular to the substrate is an arc surface or a semicircular surface, and the arc surface or the semicircular surface includes a straight line edge, and the straight line edge is located on a side close to the light-emitting device layer.

[0026] In some embodiments of the present application, the orthographic projection of the light-transmitting structure on the substrate at least partially overlaps with the orthographic projection of the light-emitting device on the substrate.

[0027] In some embodiments of the present application, the geometric center of the orthographic projection of the light-emitting device on the substrate is aligned with the geometric center of the orthographic projection of the light-transmitting structure on the substrate.

[0028] In some embodiments of the present application, the light emitting device comprises: a cathode layer, a light emitting layer and an anode layer stacked in sequence, wherein the cathode layer is located on a side of the light emitting layer close to the substrate;

[0029] Alternatively, the light emitting device comprises: a stacked backlight layer and a liquid crystal layer, wherein the backlight layer is located on a side of the liquid crystal layer close to the substrate.

[0030] In a second aspect, an embodiment of the present application provides a display device, comprising: a display panel as in any one of the above embodiments of the first aspect.

[0031] The beneficial technical effects brought by the technical solution provided by the embodiment of the present application include: by setting a light-transmitting structure and a light-transmitting layer, light in a specific large viewing angle direction is converted into a positive viewing angle direction, and the function of the optical selection film is integrated into the display panel without the optical selection film, and the light output efficiency of the display can also be increased to increase the life under the same brightness, so as to improve the quality of vehicle-mounted display products, reduce costs, and improve product competitiveness. Additional aspects and advantages of the present application will be partially given in the following description, which will become apparent from the following description or be understood through the practice of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] The above and / or additional aspects and advantages of the present application will become apparent and easily understood from the following description of the embodiments in conjunction with the accompanying drawings, in which:

[0033] Figure 1 This is a schematic diagram of the structure of a display panel in one embodiment of the present application;

[0034] Figure 2 This is a schematic plan view of a pixel unit in one embodiment of the present application;

[0035] Figure 3 This is a schematic plan view of a pixel unit in another embodiment of the present application;

[0036] Figure 4 It is a schematic plan view of a pixel unit in another embodiment of the present application;

[0037] Figure 5 This is a schematic diagram of the structure of a display panel in another embodiment of the present application;

[0038] Figure 6 This is a structural schematic diagram of a display panel in yet another embodiment of the present application;

[0039] Figure 7 FIG. 1 is a plan view of a pixel unit in another embodiment of the present application.

[0040] In the figure:

[0041] 1-substrate; 2-light-emitting device layer;

[0042] 21-light-emitting device; 22-encapsulation layer; 23-pixel definition layer; 31-light-transmitting structure; 32-light-transmitting layer;

[0043] 21a - first color light emitting device; 21b - second color light emitting device; 21c - third color light emitting device; 31a - first light-transmitting structure; 31b - second light-transmitting structure. DETAILED DESCRIPTION

[0044] The present application is described in detail below, and examples of embodiments of the present application are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar components or components with the same or similar functions. In addition, if the detailed description of the known technology is unnecessary for the features of the present application shown, it will be omitted. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present application, and cannot be interpreted as limiting the present application.

[0045] It will be understood by those skilled in the art that, unless otherwise defined, all terms (including technical and scientific terms) used herein have the same meaning as those generally understood by those skilled in the art to which this application belongs. It should also be understood that terms such as those defined in general dictionaries should be understood to have meanings consistent with those in the context of the prior art, and will not be interpreted with idealized or overly formal meanings unless specifically defined as here.

[0046] It will be understood by those skilled in the art that, unless expressly stated, the singular forms "one", "said", and "the" used herein may also include plural forms. It should be further understood that the term "comprising" used in the specification of the present application refers to the presence of features, integers, steps, operations, elements and / or components, but does not exclude the presence or addition of one or more other features, integers, steps, operations, elements, components and / or groups thereof. It should be understood that when we refer to an element as being "connected" or "coupled" to another element, it may be directly connected or coupled to the other element, or there may be an intermediate element. In addition, the "connection" or "coupling" used herein may include wireless connection or wireless coupling. The term "and / or" used herein includes all or any unit and all combinations of one or more associated listed items.

[0047] The research conducted in this application found that there are technical problems such as insufficient reliability and vehicle safety of the in-vehicle display, insufficient overall screen brightness, and insufficient life of the light-emitting device.

[0048] The present application provides a display panel and a display device, aiming to solve the above technical problems in the prior art. The technical solution of the present application and how the technical solution of the present application solves the above technical problems are described in detail below with specific embodiments.

[0049] In a first aspect, an embodiment of the present application provides a display panel. Figure 1 As shown, Figure 1 The display panel in one embodiment of the present application is a schematic diagram of the structure of the display panel, comprising: a substrate 1 , a light emitting device layer 2 , a light-transmitting structure 31 and a light-transmitting layer 32 .

[0050] The light emitting device layer 2 is disposed on one side of the substrate 1 .

[0051] The light-transmitting structure 31 is disposed on a side of the light-emitting device layer 2 away from the substrate 1 .

[0052] The light-transmitting layer 32 is disposed on a side of the light-emitting device layer 2 away from the substrate 1 and covers the light-transmitting structure 31 .

[0053] The refractive index of the light-transmitting layer 32 is greater than the refractive index of the light-transmitting structure 31 .

[0054] By providing a light-transmitting structure 31 and a light-transmitting layer 32, light in a specific large viewing angle direction is converted into a positive viewing angle direction. When the optical selection film is removed, the function of the optical selection film is integrated into the display panel. At the same time, the light output efficiency of the display can be increased to increase the lifespan at the same brightness, thereby improving the quality of vehicle-mounted display products, reducing costs, and improving product competitiveness.

[0055] In this embodiment, since the refractive index of the light-transmitting layer 32 is greater than the refractive index of the light-transmitting structure 31, when the light emitted by the light-emitting device layer 2 is emitted from the light-transmitting layer 32 to the light-transmitting structure 31, at least part of the emitted light forms total reflection at the critical surface between the light-transmitting layer 32 and the light-transmitting structure 31.

[0056] In some embodiments of the present application, the light emitting device layer 2 includes a light emitting device 21 and an encapsulation layer 22;

[0057] The light emitting device 21 is arranged on a side of the substrate 1 close to the light-transmitting layer 32;

[0058] The encapsulation layer 22 covers the light emitting device 21 , and the refractive index of the encapsulation layer 22 is smaller than the refractive index of the light-transmitting layer 32 .

[0059] In this embodiment, the light emitting device layer 2 has a large light emission angle, with a viewing angle of 85 degrees in all four directions, and the brightness attenuation of the light is small. When the light emitting device layer 2 is used in a vehicle display, the display screen will form a reflection projection on the windshield, misleading the driver's judgment, thereby affecting nighttime driving safety. In order to improve safety, it is necessary to selectively weaken the light emitted by the display panel.

[0060] The surface of the light emitting device 21 is covered by the encapsulation layer 22, which is in contact with the light-transmitting layer 32, and the light-transmitting layer 32 covers the light-transmitting structure 31. The light emitted from the light emitting device 21 first enters the encapsulation layer 22, and then enters the light-transmitting layer 32 from the encapsulation layer 22. The first part of the light is directly emitted from the light-transmitting layer 32 to the light-emitting side, and the light path of the second part of the light passes through the critical surface between the light-transmitting layer 32 and the light-transmitting structure 31. Part of the light in the second part of the light is totally reflected at the critical surface between the light-transmitting layer 32 and the light-transmitting structure 31, and the other part of the light enters the light-transmitting structure 31.

[0061] Since the condition for total reflection is: when light enters a medium with a higher refractive index into a medium with a lower refractive index, the incident angle is greater than a certain critical angle, the refracted light will disappear, and the incident light will be reflected without entering the medium with a low refractive index. Therefore, in the embodiment of the present application, the refractive index of the light-transmitting layer 32 is greater than the refractive index of the light-transmitting structure 31. In order for more light to be totally reflected at the critical surface between the light-transmitting layer 32 and the light-transmitting structure 31, a refractive index difference is formed between the encapsulation layer 22 and the light-transmitting layer 32. Specifically, the refractive index of the encapsulation layer 22 is less than the refractive index of the light-transmitting layer 32. When the outgoing light emitted from the light-emitting device 21 passes through the critical surface between the encapsulation layer 22 and the light-transmitting layer 32, a part of it is still emitted directly to the light-emitting side by the light-transmitting layer 32. When the light path of the other part of the light passes through the critical surface between the light-transmitting layer 32 and the light-transmitting structure 31, the incident angle becomes larger. Compared with the embodiment in which the refractive index of the light-transmitting layer 32 and the encapsulation layer 22 is the same, more light is totally reflected at the critical surface between the light-transmitting layer 32 and the light-transmitting structure 31.

[0062] In some embodiments of the present application, the light-transmitting structure 31 includes a first light-transmitting structure 31a, at least two first light-transmitting structures 31a are parallel and arranged at intervals along the first direction, and each first light-transmitting structure 31a extends along the second direction, and the first direction and the second direction are staggered.

[0063] like Figure 2 As shown, Figure 2 This is a planar schematic diagram of a pixel unit in an embodiment of the present application. In this embodiment, the direction of the light-emitting device layer 2 toward the windshield is defined as the first direction. In order to block the emitted light of the light-emitting device layer 2 from emitting in the first direction, a first light-transmitting structure 31a extending along the second direction is provided, and the first direction and the second direction are interlaced with each other, so that the light path of the emitted light passes through the first light-transmitting structure 31a. In addition, in this embodiment, a plurality of pixel units are arranged in an array, and a plurality of first light-transmitting structures 31a are arranged parallel to each other and spaced apart along the first direction, that is, each pixel unit is provided with a first light-transmitting structure 31a at least on one side facing the windshield in the first direction.

[0064] In some embodiments of the present application, the light emitting device layer 2 includes a plurality of pixel units, each pixel unit includes: a first color light emitting device 21a, a second color light emitting device 21b and a third color light emitting device 21c;

[0065] The first light-transmitting structure 31 a is located at two opposite sides of the pixel unit in the first direction and between the first color light-emitting device 21 a and the second color light-emitting device 21 b .

[0066] In this embodiment, multiple pixel units are arranged in an array, and a first light-transmitting structure 31a is set between two adjacent pixel units in the first direction, that is, different first light-transmitting structures 31a are parallel to each other and also form an array arrangement, and at least one pixel unit is exactly located between two adjacent first light-transmitting structures 31a.

[0067] Further exploration of the pixel unit shows that each pixel unit includes a first color light emitting device 21a, a second color light emitting device 21b and a third color light emitting device 21c. In a specific embodiment, the first color is red light, the second color is green light, and the third color is blue light. Due to the poor stability and short life of the blue phosphorescent material and the low luminous efficiency of the blue fluorescent material, the positive projection area of ​​the third color light emitting device 21c on the substrate 1 is larger than the positive projection area of ​​any one of the first color light emitting device 21a and the second color light emitting device 21b on the substrate 1. The first color light emitting device 21a and the second color light emitting device 21b are arranged together on the upper side of the figure, and the third color light emitting device 21c is arranged alone on the lower side of the figure. In addition to being arranged outside the pixel unit, the first light-transmitting structure 31a is also arranged between the first color light emitting device 21a and the second light emitting device 21. Prevent the emitted light of the first color light emitting device 21a or the second color light emitting device 21b from escaping in the first direction.

[0068] In some embodiments of the present application, the display panel further includes a second light-transmitting structure 31b, at least two second light-transmitting structures 31b are parallel and arranged at intervals along the second direction, and each second light-transmitting structure 31b extends along the first direction, and the first direction is perpendicular to the second direction.

[0069] like Figure 3 As shown, Figure 3 This is a planar schematic diagram of a pixel unit in another embodiment of the present application. The display panel is used in a vehicle-mounted display. In addition to forming a reflected projection on the windshield, the display screen also forms a reflected projection on the side electronic rearview mirror. For driving safety, a second light-transmitting structure 31b is also provided in this embodiment, and the direction of the display device layer toward any electronic rearview mirror is defined as the second direction. In order to block the emitted light of the light-emitting device layer 2 from emitting in the second direction, a second light-transmitting structure 31b extending along the first direction is provided. In a specific embodiment, the first direction and the second direction are perpendicular to each other, then a part of the optical path of the emitted light passes through the first light-transmitting structure 31a, and the other part passes through the second light-transmitting structure 31b. In addition, in this embodiment, a plurality of pixel units are arranged in an array, and a plurality of second light-transmitting structures 31b are arranged in parallel with each other and spaced apart along the second direction, that is, each pixel unit is provided with a second light-transmitting structure 31b on at least one side of the second direction facing any electronic rearview mirror.

[0070] In some embodiments of the present application, the light emitting device 21 includes a plurality of pixel units, each pixel unit includes: a first light emitting device 21 , a second light emitting device 21 , and a third light emitting device 21 ;

[0071] The first light-transmitting structure 31a is disposed on two opposite sides of the pixel unit in the first direction and between the first light-emitting device 21 and the second light-emitting device 21 , and the second light-transmitting structure 31b is disposed on two opposite sides of the pixel unit in the second direction.

[0072] In this embodiment, multiple pixel units are arranged in an array, and a second light-transmitting structure 31b is set between two adjacent pixel units in the second direction, that is, different second light-transmitting structures 31b are parallel to each other and also form an array arrangement, and at least one pixel unit is exactly located between two adjacent second light-transmitting structures 31b.

[0073] Further exploration of the pixel unit shows that each pixel unit includes a first color light emitting device 21a, a second color light emitting device 21b and a third color light emitting device 21c. On the basis of the above embodiment, the first color light emitting device 21a and the second color light emitting device 21b are arranged together on the upper side of the figure, and the third color light emitting device 21c is arranged alone on the lower side of the figure. The second light-transmitting structure 31b is at least arranged outside the pixel unit, that is, arranged on two opposite sides of the pixel unit in the second direction. In another embodiment, the second light-transmitting structure 31b is also arranged between the third color light emitting device 21c and the first color light emitting device 21a or the second light emitting device 21, and at least one second light-transmitting structure 31b is arranged inside the pixel unit to separate the first color light emitting device 21a, the second color light emitting device 21b and the third color light emitting device 21c. Prevent the emitted light of the first color light emitting device 21a, the second color light emitting device 21b or the third color light emitting device 21c from escaping in the second direction.

[0074] In some embodiments of the present application, a height of at least one first light-transmitting structure 31 a is greater than a height of at least one second light-transmitting structure 31 b .

[0075] In this embodiment, since the electronic rearview mirror and the driver are located in the same direction of the light-emitting device layer 2, that is, in the second direction, the height of the second light-transmitting structure 31b needs to be less than the height of the first light-transmitting structure 31a to prevent the light-transmitting structure 31 from affecting the driver's front view light. In the preparation of the display panel, the first light-transmitting structure 31a and the second light-transmitting structure 31b are prepared by using a halftone mask. The transmittance of the portion of the halftone mask corresponding to the first light-transmitting structure 31a is low, and the transmittance of the portion corresponding to the second light-transmitting structure 31b is high, so that the height of the first light-transmitting structure 31a is greater than the height of the second light-transmitting structure 31b, so that the light that is totally reflected by the second light-transmitting structure 31b is less than the light that is totally reflected by the first light-transmitting structure 31a. The morphology and height of the first light-transmitting structure 31a and the second light-transmitting structure 31b are reasonably selected so that the light that is totally reflected by the light-transmitting structure 31 is emitted to the front view angle to enhance the brightness of the light at the front view angle. In this embodiment, the light after total reflection is emitted to a viewing angle of 45 degrees to 60 degrees, and the driver and the co-driver can observe this viewing angle.

[0076] In some embodiments of the present application, a refractive index of at least one first light-transmitting structure 31 a is smaller than a refractive index of at least one second light-transmitting structure 31 b .

[0077] In this embodiment, since the electronic rearview mirror and the driver are located in the same direction of the light-emitting device layer 2, that is, in the second direction, the refractive index of the second light-transmitting structure 31b needs to be greater than the refractive index of the first light-transmitting structure 31a, so as to prevent the light-transmitting structure 31 from affecting the driver's front-view light. In the preparation of the display panel, different materials are used to prepare the first light-transmitting structure 31a and the second light-transmitting structure 31b respectively, and the refractive index difference between the second light-transmitting structure 31b and the light-transmitting layer 32 is less than the difference between the first light-transmitting structure 31a and the light-transmitting layer 32, so that the refractive index of the second light-transmitting structure 31b is greater than the refractive index of the first light-transmitting structure 31a, so that the light that is totally reflected by the second light-transmitting structure 31b is less than the light that is totally reflected by the first light-transmitting structure 31a. In the second direction, while ensuring the front-view light output, the light output at other angles is shielded, and a structure and material with better shading effect can be selected in the first direction.

[0078] In some embodiments of the present application, the orthographic projection of at least one of the first color light-emitting device 21a, the second color light-emitting device 21b and the third color light-emitting device 21c on the substrate 1 is a first orthographic projection, and the outline of the first orthographic projection is an axisymmetric polygon; the orthographic projection of the light-transmitting structure 31 on the substrate 1 is a second orthographic projection, and the second orthographic projection at least surrounds the opposite sides of the first orthographic projection in the first direction, and surrounds part of the side surfaces of the first orthographic projection in the second direction.

[0079] In some embodiments, the outline of the first orthographic projection is a non-axisymmetric polygon; the orthographic projection of the light-transmitting structure 31 on the substrate 1 is a second orthographic projection, and the second orthographic projection at least surrounds at least one side of the first orthographic projection; in some embodiments, the second orthographic projection at least surrounds at least two opposite sides of the first orthographic projection.

[0080] The second orthographic projection completely surrounds the first orthographic projection in the first direction, and half surrounds the first orthographic projection in the second direction to form at least one gap.

[0081] In one embodiment, at least one of the first color light emitting device 21a, the second color light emitting device 21b and the third color light emitting device 21c has a rectangular projection on the substrate 1, and the light-transmitting structure 31 is arranged on two opposite sides of the above-mentioned light emitting device 21, and the shading effect is better.

[0082] like Figure 4 As shown, Figure 4This is a planar schematic diagram of a pixel unit in another embodiment of the present application. In another embodiment, the orthographic projection of at least one of the first color light-emitting device 21a, the second color light-emitting device 21b and the third color light-emitting device 21c on the substrate 1 is an axisymmetric polygon (the number of sides is greater than 4), such as a hexagon. The light-transmitting structure 31 is only arranged on two opposite sides of the above-mentioned light-emitting device 21, and the light leakage phenomenon is still serious. In this embodiment, the second orthographic projection not only completely surrounds the opposite sides of the first orthographic projection in the first direction, but also surrounds part of the side surface of the first orthographic projection in the second direction, and the unenclosed part forms a gap. The gap can be located only on one side of the first orthographic projection, or on two opposite sides of the first orthographic projection in the second direction. The emergent light of the light-emitting device layer 2 passes through the gap toward the normal viewing angle.

[0083] In some embodiments of the present application, the cross-sectional pattern of the light-transmitting structure 31 perpendicular to the substrate 1 is a trapezoidal surface, and the bottom of the trapezoid is located on a side close to the light-emitting device layer 2 .

[0084] In some embodiments, the cross-sectional pattern of the light-transmitting structure 31 is a trapezoid that is narrow at the top and wide at the bottom. The bottom surface of the light-transmitting structure 31 is disposed on the encapsulation layer 22, that is, the bottom of the trapezoid is in direct contact with the encapsulation layer 22. In a specific embodiment, the cross-sectional pattern of the light-transmitting structure 31 is a regular trapezoid.

[0085] In some embodiments of the present application, the cross-sectional pattern of the light-transmitting structure 31 perpendicular to the substrate 1 is an arc surface or a semicircular surface, and the arc surface or the semicircular surface includes a straight line edge, and the straight line edge is located on a side close to the light-emitting device layer 2 .

[0086] like Figure 5 As shown, Figure 5 Schematic diagram of the structure of the display panel in another embodiment of the present application. In some embodiments, the cross-sectional pattern of the light-transmitting structure 31 is a curved surface or a semicircular surface. The bottom surface of the light-transmitting structure 31 is disposed on the encapsulation layer 22, that is, the straight edge of the curved surface or the semicircular surface is in direct contact with the encapsulation layer 22.

[0087] In some embodiments of the present application, the orthographic projection of the light-transmitting structure 31 on the substrate 1 at least partially overlaps with the orthographic projection of the light-emitting device 21 on the substrate 1 .

[0088] In some embodiments, the colors of the emitted light between adjacent light-emitting devices 21 are different, such as between any two of the first color light-emitting device 21a, the second color light-emitting device 21b, and the third color light-emitting device 21c. In order to prevent mutual interference, a stacked pixel definition layer 23 and a black matrix are provided between adjacent light-emitting devices 21, and the orthographic projection of the black matrix on the substrate 1 covers the orthographic projection of the light-transmitting structure 31 on the substrate 1. In this embodiment, the light-transmitting structure 31 does not affect the light emitted from the light-emitting device layer 2 directly toward the light-emitting side, and only reflects the light with a large viewing angle.

[0089] In other embodiments, a stacked pixel definition layer 23 and a black matrix are provided between adjacent light emitting devices 21. A portion of the orthographic projection of the light-transmitting structure 31 coincides with the orthographic projection of the black matrix on the substrate 1, and another portion coincides with the orthographic projection of the light emitting device 21 on the substrate 1.

[0090] like Figure 6 and Figure 7 As shown, Figure 6 This is a schematic diagram of the structure of a display panel in another embodiment of the present application. Figure 7 FIG. 1 is a plan view of a pixel unit in another embodiment of the present application.

[0091] In some other embodiments, the orthographic projection of the light-emitting device 21 on the substrate 1 covers the orthographic projection of the light-transmitting structure 31 on the substrate 1. In this embodiment, a stacked pixel definition layer 23 and a black matrix are provided between adjacent light-emitting devices 21. The orthographic projection of the light-transmitting structure 31 on the substrate 1 is completely within the coverage range of the orthographic projection of the light-emitting device 21 on the substrate 1, and has no intersection outside the coverage range of the orthographic projection of the black matrix on the substrate 1.

[0092] In a specific embodiment, the geometric center of the orthographic projection of the light emitting device 21 on the substrate 1 is aligned with the geometric center of the orthographic projection of the light-transmitting structure 31 on the substrate 1 .

[0093] In one embodiment of the present application, the light emitting device 21 comprises: a cathode layer, a light emitting layer and an anode layer stacked in sequence, wherein the cathode layer is located on a side of the light emitting layer close to the substrate 1;

[0094] In another embodiment of the present application, the light emitting device 21 includes: a stacked backlight layer and a liquid crystal layer, and the backlight layer is located on a side of the liquid crystal layer close to the substrate 1 .

[0095] The display panel provided in this application is applicable to OLED and liquid crystal display panels (Liquid Crystal Display, LCD).

[0096] Based on the same inventive concept, in a second aspect, an embodiment of the present application provides a display device, comprising: a display panel as in any one of the above embodiments of the first aspect.

[0097] By applying the embodiments of the present application, at least the following beneficial effects can be achieved: by providing a light-transmitting structure 31 and a light-transmitting layer 32, light in a specific large viewing angle direction is converted into a positive viewing angle direction. When the optical selection film is removed, the function of the optical selection film is integrated into the display panel. At the same time, the light output efficiency of the display can be increased to increase the lifespan at the same brightness, thereby improving the quality of vehicle-mounted display products, reducing costs, and improving product competitiveness.

[0098] Those skilled in the art will appreciate that the various operations, methods, steps, measures, and schemes in the processes discussed in this application may be alternated, altered, combined, or deleted. Further, other steps, measures, and schemes in the various operations, methods, and processes discussed in this application may also be alternated, altered, rearranged, decomposed, combined, or deleted. Further, the steps, measures, and schemes in the prior art that are similar to those disclosed in this application may also be alternated, altered, rearranged, decomposed, combined, or deleted.

[0099] In the description of the present application, it should be understood that the terms "center", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0100] The terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of this application, unless otherwise specified, "plurality" means two or more.

[0101] In the description of this application, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0102] In the description of this specification, specific features, structures, materials or characteristics may be combined in an appropriate manner in any one or more embodiments or examples.

[0103] It should be understood that, although the steps in the flowchart of the accompanying drawings are displayed in sequence as indicated by the arrows, these steps are not necessarily executed in sequence in the order indicated by the arrows. Unless otherwise specified herein, there is no strict order restriction on the execution of these steps, and they can be executed in other orders. Moreover, at least a part of the steps in the flowchart of the accompanying drawings may include multiple sub-steps or multiple stages, and these sub-steps or stages are not necessarily executed at the same time, but can be executed at different times, and their execution order is not necessarily sequential, but can be executed in turn or alternately with other steps or at least a part of the sub-steps or stages of other steps.

[0104] The above description is only a partial implementation method of the present application. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principles of the present application. These improvements and modifications should also be regarded as the scope of protection of the present application.

Claims

1. A display panel, characterized in that: include: substrate; A light emitting device layer is disposed on one side of the substrate; A light-transmitting structure, arranged on a side of the light-emitting device layer away from the substrate; A light-transmitting layer, disposed on a side of the light-emitting device layer away from the substrate and covering the light-transmitting structure; Wherein, the refractive index of the light-transmitting layer is greater than the refractive index of the light-transmitting structure; The light-emitting device layer includes a light-emitting device and an encapsulation layer; The light emitting device is arranged on a side of the substrate close to the light-transmitting layer; The encapsulation layer covers the light emitting device, and the refractive index of the encapsulation layer is smaller than the refractive index of the light-transmitting layer.

2. The display panel according to claim 1, characterized in that: The light-transmitting structure includes a first light-transmitting structure, at least two of the first light-transmitting structures are parallel and arranged at intervals along a first direction, and each of the first light-transmitting structures extends along a second direction, and the first direction and the second direction are interlaced with each other.

3. The display panel according to claim 2, characterized in that: The light emitting device layer includes a plurality of pixel units, each of which includes: a first color light emitting device, a second color light emitting device and a third color light emitting device; The first light-transmitting structure is located at two opposite sides of the pixel unit in the first direction and between the first color light-emitting device and the second color light-emitting device.

4. The display panel according to claim 2, characterized in that: The display panel further includes a second light-transmitting structure, at least two of the second light-transmitting structures are parallel and arranged at intervals along a second direction, and each of the second light-transmitting structures extends along a first direction, and the first direction is perpendicular to the second direction.

5. The display panel according to claim 4, characterized in that: The light emitting device comprises a plurality of pixel units, each of which comprises: a first light emitting device, a second light emitting device and a third light emitting device; The first light-transmitting structure is disposed on two opposite sides of the pixel unit in the first direction and between the first light-emitting device and the second light-emitting device, and the second light-transmitting structure is disposed on two opposite sides of the pixel unit in the second direction.

6. The display panel according to claim 4, characterized in that: The height of at least one of the first light-transmitting structures is greater than the height of at least one of the second light-transmitting structures.

7. The display panel according to claim 4, characterized in that: The refractive index of at least one of the first light-transmitting structures is smaller than the refractive index of at least one of the second light-transmitting structures.

8. The display panel according to claim 3, characterized in that: The orthographic projection of at least one of the first color light emitting device, the second color light emitting device and the third color light emitting device on the substrate is a first orthographic projection, and the outline of the first orthographic projection is an axisymmetric polygon; The orthographic projection of the light-transmitting structure on the substrate is a second orthographic projection, and the second orthographic projection at least surrounds two opposite sides of the first orthographic projection in the first direction and surrounds part of the side surface of the first orthographic projection in the second direction.

9. The display panel according to claim 1, characterized in that: The cross section of the light-transmitting structure perpendicular to the substrate is trapezoidal, and the lower base of the trapezoid is located at a side close to the light-emitting device layer.

10. The display panel according to claim 1, characterized in that: The cross-sectional pattern of the light-transmitting structure perpendicular to the substrate is an arc surface or a semicircular surface, and the arc surface or the semicircular surface includes a straight line edge, and the straight line edge is located on a side close to the light-emitting device layer.

11. The display panel according to claim 1, characterized in that: The orthographic projection of the light-transmitting structure on the substrate at least partially overlaps with the orthographic projection of the light-emitting device on the substrate.

12. The display panel according to claim 11, characterized in that: The geometric center of the orthographic projection of the light-emitting device on the substrate is aligned with the geometric center of the orthographic projection of the light-transmitting structure on the substrate.

13. The display panel according to claim 1, characterized in that: The light emitting device comprises: a cathode layer, a light emitting layer and an anode layer stacked in sequence, wherein the cathode layer is located on a side of the light emitting layer close to the substrate; Alternatively, the light emitting device comprises: a stacked backlight layer and a liquid crystal layer, wherein the backlight layer is located on a side of the liquid crystal layer close to the substrate.

14. A display device, characterized in that: A display panel comprising any one of claims 1-13.

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