CN113241364A - Optical structure and display assembly - Google Patents
Optical structure and display assembly Download PDFInfo
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- CN113241364A CN113241364A CN202110665648.0A CN202110665648A CN113241364A CN 113241364 A CN113241364 A CN 113241364A CN 202110665648 A CN202110665648 A CN 202110665648A CN 113241364 A CN113241364 A CN 113241364A
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- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
- H10K59/00—Integrated devices, or assemblies of multiple devices, comprising at least one organic light-emitting element covered by group H10K50/00
- H10K59/10—OLED displays
Abstract
The invention relates to the field of optics and discloses an optical structure and a display assembly. The optical structure includes: the structure body is arranged between the light source and the medium layer; the structure body is provided with a first surface facing one side of the light source and a second surface facing the medium layer, and a plurality of bulges are formed on the second surface; the refractive index of the structure body is higher than that of the medium layer, the critical angle of the light emitted by the light source at the interface of the structure body and the medium layer for realizing total reflection is theta, and the theta is more than or equal to 45 degrees. The optical structure can improve the emergence rate of light rays incident to the area where the protrusion is located, equivalently, the light loss of waveguide light is reduced, more light rays are guided into air, and the luminous efficiency of the display device can be greatly improved; and the light rays with large visual angles are converged to small visual angles, so that the front brightness of the display can be obviously improved.
Description
Technical Field
The present invention relates to the field of optical technologies, and in particular, to an optical structure and a display module.
Background
In recent years, Display technologies are continuously updated, and the Display of a conventional LCD (Liquid Crystal Display) is continuously expanded to Mini LED (Light-Emitting Diode), QLED (Quantum Dot Light-Emitting Diode), OLED (Organic Light-Emitting Diode), and Micro LED (Micro Light-Emitting Diode). The electroluminescent QLED, the OLED and the Micro LED are active light-emitting display devices. The active light-emitting display device generates light signals by light emission of an organic material (OLED), a quantum dot (QLED) or an LED wafer (Micro LED), passes through an organic or inorganic medium, and finally emits the light signals to the air after passing through an MDL material.
Before the light emitted by the light source is emitted to the air, a large part of light is totally reflected by a high-refraction interface to a low-refraction interface to cause waveguide light loss. The traditional plane stacking structure does not change the light emitting path, so that more light can not be concentrated to the front surface for emitting, the front surface brightness can not be further improved, and the power consumption is reduced.
Disclosure of Invention
The invention discloses an optical structure and a display component, which are used for reducing waveguide light loss and improving the emergent efficiency of front light.
In order to achieve the purpose, the invention provides the following technical scheme:
an optical structure comprising: the structure body is arranged between the light source and the medium layer;
the structure body is provided with a first surface facing one side of the light source and a second surface facing the medium layer, and a plurality of bulges are formed on the second surface;
the refractive index of the structure body is higher than that of the medium layer, the critical angle of the light emitted by the light source at the interface of the structure body and the medium layer for realizing total reflection is theta, and the theta is more than or equal to 45 degrees.
According to the optical structure, when light emitted by the light source enters the convex area of the optical structure, at least part of the light can be emitted to the dielectric layer from the convex area, so that the emission rate of the light emitted to the area where the convex area is located is improved, namely, the waveguide light loss is reduced, more light is guided to the air, and the luminous efficiency of the display device can be greatly improved; and the light rays with large visual angles are converged to small visual angles, so that the front brightness of the display can be obviously improved.
Preferably, the protrusions are perpendicular to the second surface.
Preferably, the size of each of the protrusions satisfies the following condition:
wherein d is1The dimension of the projection perpendicular to the second surface, d2Is the dimension of the protrusion parallel to the second surface.
Preferably, the size of each of the protrusions satisfies the following condition:
preferably, the size of the bottom surface of the protrusion is larger than the size of the top surface of the protrusion, and the orthographic projection of the top surface on the second surface falls within the orthographic projection of the bottom surface on the second surface.
Preferably, an included angle between a side surface of the protrusion and the second surface is 60-90 °, and the side surface is an inclined surface between the bottom surface and the top surface. Preferably, the optical structure corresponds to a non-pixel region; the size of the protrusions perpendicular to the second surface is 5-10 μm, the size of the protrusions parallel to the second surface is 10-20 μm, and the distance between any two adjacent protrusions is 10-25 μm.
Preferably, the protrusions are arranged on the second surface of the structural body at equal intervals on the whole surface, the size of the protrusions perpendicular to the second surface is 2-10 μm, the size of the protrusions parallel to the second surface is 3-10 μm, and the interval between any two adjacent protrusions is 5-10 μm.
A display assembly, comprising: the display module is provided with any one of the optical structures provided by the technical scheme.
Preferably, the display module comprises a first packaging layer, an organic layer, a second packaging layer, a functional layer and a display cover plate which are sequentially formed on one side of the light source light-emitting surface, and the refractive index of the first packaging layer is greater than that of the organic layer;
the optical structure is formed on the surface of the display cover plate, which faces away from the light source;
alternatively, the optical structure is formed on the surface of the first packaging layer facing the organic layer.
Drawings
FIG. 1 is a schematic diagram showing a light-emitting mode ratio of the display device;
FIGS. 2a and 2b are schematic diagrams illustrating light exiting from a display device according to the prior art;
FIG. 3 is a schematic diagram illustrating the principle of total reflection of light at an interface;
FIG. 4a is a schematic structural diagram of an optical structure according to an embodiment of the present invention;
fig. 4b is a schematic diagram of light exiting from an optical structure according to an embodiment of the present invention;
FIG. 5 is a schematic structural diagram of an optical structure according to an embodiment of the present invention;
fig. 6 is a schematic structural diagram of a display module according to an embodiment of the present invention;
FIG. 7 is a schematic structural diagram of a display module according to an embodiment of the present invention;
FIG. 8 is a schematic diagram illustrating total reflection of light rays in a conventional display device;
fig. 9 is a schematic structural diagram of a display module according to an embodiment of the present invention;
FIG. 10 is a schematic structural diagram of a display module according to an embodiment of the present invention;
FIG. 11 is a flow chart of a method for making an optical structure according to an embodiment of the present invention;
FIG. 12 is a flow chart of a method for making an optical structure according to an embodiment of the present invention;
fig. 13 is a flowchart of a method for manufacturing an optical structure according to an embodiment of the present invention.
Icon: 10-an optical structure; 1-a structural body; 11-a bump; 20-a light source; 30-a dielectric layer; 40-package group; 41-a first encapsulation layer; 42-organic layer; 43-a second encapsulation layer; 50-a functional layer; 60-display cover plate; 70-a substrate; 80-optical cement.
Detailed Description
Fig. 1 shows a schematic diagram of the proportion of light extraction modes in a display device, most of these optical media have refractive indices greater than 1.5 and air has a refractive index of about 1. Before exiting into the air, a large portion of the light will be lost as a result of total reflection at the high-fold to low-fold interface. At present, the traditional plane stacking structure does not change a light emitting path, more light can not be concentrated to the front surface for emitting, the front surface brightness can not be further improved, and the power consumption is reduced.
Some prior art adopt the microlens structure to carry out the effect that light assembles, for example adopt high-refraction material to prepare convex lens and assemble the light of different visual angles to the front, utilize convex lens to increase the positive light-emitting to the effect of assembling of light. However, the scheme has certain defects, firstly, the traditional process is difficult to obtain a convex lens structure with a regular shape, and the shape of the lens cannot be accurately controlled; in addition, the pixel size of the existing display devices such as OLED is more than 10 um. It can be seen from fig. 2a that the presence of the lens can concentrate light over a range of angles to the front (shown by the solid line) and also scatter part of the light from the front to the viewing angle (shown by the dashed line). Therefore, the improvement effect of this scheme is limited, and this scheme does not involve the utilization of waveguide light.
In addition, in some prior art, the light rays at other angles are converged to the normal viewing angle through the reflection effect by utilizing the total reflection effect of the high-refraction interface to the low-refraction interface, as shown in fig. 2b, but the reflection form in the scheme is complex in shape and appearance, higher matching property with a placement area is required, and the process difficulty is relatively high. There are also some prior art techniques that scatter waveguide light out by adding scattering particles, but the presence of scattering particles also reduces the amount of light emitted from the front of the device.
Accordingly, embodiments of the present invention provide an optical structure and a display device, so as to reduce waveguide light loss and improve front light emitting efficiency.
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
As shown in fig. 3, the embodiment of the present invention provides an optical structure 10, the optical structure 10 includes a structural body 1, the structural body 1 is disposed between a light source 20 and a medium layer 30 when in use, and the structural body 1 has a first surface a1 facing a side of the light source 20 and a second surface a2 facing the medium layer 30. Specifically, as shown in FIG. 3, the refractive index of the optical structure 10 is set to n1The refractive index of the dielectric layer 30 is n2，n1＞n2. The light emitted from the light source 20 reaches the interface l between the optical structure 10 and the dielectric layer 30 after propagating in the optical structure 10, and total reflection occurs due to the difference between the refractive indexes of the optical structure 10 and the dielectric layer 30, and the conditions for achieving total reflection are as follows:
n1*sin90°＝n2*sinθ
the critical angle of the light to realize total reflection at the interface of the structural body 1 and the dielectric layer 30 is θ. In FIG. 3, light from the light source 20 passes through the optical structure 10 and enters the dielectric layer 30, and the incident angle of the light b1 at the interface of the optical structure 10 is θ1(also corresponding to the angle of incidence of the light at the interface of optical structure 10 and dielectric layer 30), and the angle of incidence of light ray b2 at the interface of optical structure 10 is θ2(also corresponding to the angle of incidence of light at the interface of optical structure 10 and dielectric layer 30), θ1And theta2Both greater than θ, therefore, light rays b1 and b2 achieve total reflection at the optical structure 10 interface; the incident angle of light ray b3 at the interface of optical structure 10 is θ3The incident angle of light ray b4 at the interface of optical structure 10 is θ4，θ3And theta4Are both less than θ, and thus, light b3 and light b4 are incident on the optical structure 10 and the dielectric layerAnd exits into the medium layer 30 after being refracted at the interface of the medium layer 30.
In the embodiment of the present application, the optical structure 10 may be configured as shown in fig. 4a, wherein a plurality of protrusions 11 perpendicular to the second surface a2 are formed on the second surface a2 of the structural body 1, where θ is set to be equal to or greater than 45 °, that is, the angle of the light beam for achieving total reflection at the interface between the structural body 1 and the medium layer 30 needs to be equal to or greater than 45 °.
Based on the structure of the structural body 1, when light emitted from the light source 20 enters the medium layer 30 in a non-convex region (a planar region between any two protrusions 11) of the structural body 1, the refraction and total reflection conditions of the interface are equivalent to those of a planar structure.
The light direction of the light incident on the dielectric layer 30 in the region of the protrusion 11 of the structural body 1 needs to be analyzed. Referring to FIG. 4b, ray c1 enters optical structure 10 at an interface at an angle of incidence θ5，θ5Theta, when the light ray c1 reaches the interface between the optical structure 10 and the dielectric layer 30, the angle between the light ray c1 and the normal is 90 DEG-theta5Since theta is greater than or equal to 45 DEG, 90 DEG to theta5The angle is less than 45 degrees, the refraction and emergence conditions of the light rays are met, therefore, the light rays c1 can enter the medium layer 30 from the optical structure 10, and compared with the prior art, the light loss can be reduced; because the refractive index of the optical structure 10 is greater than that of the medium layer 30, the light ray c3 is emitted to the medium layer 30 and then deflected away from the normal direction, the included angle between the light ray emitted from the vertical interface and the vertical direction is reduced, which is equivalent to the convergence of the light ray to a small viewing angle, and the front light emission can be further increased. The direction of light ray c2 and light ray c1 entering optical structure 10 is different from light ray c1, and the angle of incidence of light ray c2 entering the interface of optical structure 10 is θ6，θ6Theta, when the light ray c2 reaches the interface between the optical structure 10 and the dielectric layer 30, the angle between the light ray c2 and the normal is 90 DEG-theta6Since theta is greater than or equal to 45 DEG, 90 DEG to theta6< 45 deg., so that light ray c2 also enters the dielectric layer 30 from the optical structure 10, light ray c2 is similar to light ray c1 and does not appear here. The angle of incidence of light ray c3 at the interface into optical structure 10 is θ7，θ7θ, the light c3 reaches the side of the protrusion 11 perpendicular to the second surface a2 (the interface of the optical structure 10 and the dielectric layer 30)) When the angle between the light ray c3 and the normal is 90-theta7Because theta is more than or equal to 45 degrees and is between 90 and theta7Not less than 45 degrees, the total reflection condition of the light ray c3 is satisfied, the light ray c3 is totally reflected at the interface of the optical structure 10 and the dielectric layer 30, and continuously propagates in the optical structure 10 until the protrusion 11 is parallel to the surface of the second surface a2 (the interface of the optical structure 10 and the dielectric layer 30), and the included angle between the light ray c3 and the normal is theta7，θ7And the light ray c3 is emitted from the optical structure 10 to the medium layer 30 at a value not more than theta, and the light emission is not influenced. A light ray c4, having a different direction than light ray c3, enters optical structure 10 at an angle of incidence θ8，θ8θ, the light c4 can exit from the surface of the protrusion 11 parallel to the second surface a2 to the medium layer 30.
With reference to the path of the light in the optical structure 10 in fig. 5, it can be seen that the optical structure 10 provided in the present application can improve the emergence rate of the light incident to the area where the protrusion 11 is located, which is equivalent to reducing the light loss, and guide more light into the air, so as to greatly improve the light emitting efficiency of the display device; and the light rays with large visual angles are converged to small visual angles, so that the front brightness of the display can be obviously improved.
In a preferred embodiment, the dimensions of each protuberance 11 satisfy the following condition:
wherein d is1Dimension of the projection 11 perpendicular to the second surface a2, d2The dimension of the protrusion 11 parallel to the second surface a 2.
Due to the size design, the light rays which would be totally reflected at the interface of the protrusion 11 parallel to the second surface a2 can be incident to the interface of the protrusion 11 perpendicular to the second surface a2 to be refracted and emitted into the medium layer 30 (refer to the light ray c1 in fig. 4 a), which is equivalent to further increase the light emission amount and reduce the light loss. d1/d2Can range from 0.5 to 1, including 0.5.
The optical structure 10 may also have a base dimension d of the protrusions 11 as shown in FIG. 55Is larger than the top surface dimension d of the projection 114And the orthographic projection of the top surface on the second surface a2 falls within the orthographic projection of the bottom surface on the second surface a 2. The side surfaces of the protrusions 11 are at an angle of 60-90 deg. to the second surface a2, where the side surfaces are slopes between the bottom and top surfaces. According to the principle analysis, the reasonable structural size of the protrusion 11 can change the light trend and increase the light extraction rate.
The size of the protrusions 11 of the optical structure 10 can be adjusted as required, and when the protrusions 11 are uniformly distributed over the entire surface, the size of the protrusions 11 parallel to the substrate 70 can be set to 3-10 μm, the size of the protrusions 11 perpendicular to the substrate 70 is set to 2-10 μm, and the distance between two adjacent protrusions 11 is set to 5-10 μm.
And when the optical structure 10 corresponds to a non-pixel region of a display device, the size of the protrusions 11 perpendicular to the second surface a2 is 5-10 μm, the size of the protrusions 11 parallel to the second surface a2 is 10-20 μm, and the interval between any two adjacent protrusions 11 is 10-25 μm. Such a range of values is such that the projection 11 can be matched with the size of the pixel defining area in consideration of the size of the pixel defining area in the related art. But the distance between any two protrusions 11 (d in fig. 4 a)3Or d in FIG. 56) Can be set to be d1And (4) the equivalent.
It is to be noted that, when the projection 11 has the structure shown in fig. 5, the dimension of the projection 11 parallel to the second surface a2 should be the dimension of the bottom surface thereof.
Based on the optical structure 10, taking the optical structure 10 shown in fig. 4a as an example, the present application further provides a display assembly, which includes a light source 20 and a display module formed on a light-emitting surface side of the light source 20, wherein the display module is provided with the optical structure 10. Here, the optical structure 10 may be disposed on a surface of the display module, or disposed inside the display module, and it should be determined that in the optical structure 10, the first surface a1 of the structure body 1 needs to face the light source 20, and the second surface a2 (the side having the protrusion 11) is far away from the light source 20; also, the refractive index of the dielectric layer 30 on the side of the second surface a2 of the structural body 1 needs to be smaller than that of the structural body 1.
Fig. 6 shows a possible structure of a display module, which includes a light source 20, and a package group 40, a functional layer 50 and a display cover plate 60 sequentially formed on a light emitting surface side of the light source 20. The packaging set 40, the functional layer 50 and the display cover plate 60 together form a display module. The optical structure 10 is formed on a surface of the display cover 60. In this configuration, air acts as the dielectric layer 30 into which the optical structure 10 exits.
The package group 40 includes a first package layer 41, an organic layer 42, and a second package layer 43 sequentially disposed on one side of the light emitting surface of the light source 20, where the first package layer 41 may be made of silicon oxynitride, and the second package layer 43 may be made of silicon nitride. The functional layer 50 may be a polarizer or a touch layer. The light source 20 is provided as an organic light emitting layer. A substrate 70 is disposed on the backlight side of the light source 20, and both surfaces of the functional layer 50 are respectively bonded to the display cover plate 60 and the encapsulation group 40 by optical glue 80.
In fig. 6, the optical structure 10 and the display cover plate 60 are a one-piece structure, which is equivalent to directly forming the protrusions 11 on the surface of the display cover plate 60 as the optical structure 10, and the forming process can select a template stamping mode. The display cover 60 may be glass or a flexible cover, both having a refractive index of about 1.5.
In another embodiment, as shown in fig. 7, the optical structure 10 is independent from the display cover plate 60, and the optical structure 10 may be an optical film attached to the surface of the display cover plate 60, and the surface of the optical film facing away from the display cover plate 60 forms the protrusion 11. The refractive index of the optical film can be selected to be about 1.41, the material can be silicon oxide or other organic materials, and the protrusions 11 are prepared through dry etching or other processes. According to the fresnel formula, it is shown that there is substantially no total reflection between the cover plate 60 and the optical structure 10, and the optical structure 10 can significantly reduce the total reflection light quantity generated when the light enters the air, and according to the experimental data, the total reflection waveguide light quantity can be reduced by 20% to 50%. According to experimental data, the energy of the waveguide mode light is about 20-40% compared with the energy of the conventional emergent light, so that the light-emitting rate can be improved by 10-20% compared with the prior art after the optical structure 10 is adopted.
Fig. 8 shows another display module with a conventional structure, which includes a light source 20, and a package group 40, a functional layer 50 and a display cover plate 60 sequentially formed on a light emitting surface side of the light source 20. The packaging set 40, the functional layer 50 and the display cover plate 60 together form a display module. The package group 40 includes a first package layer 41, an organic layer 42, and a second package layer 43 sequentially disposed on one side of the light emitting surface of the light source 20, where the first package layer 41 may be made of silicon oxynitride, and the second package layer 43 may be made of silicon nitride. The functional layer 50 may be a polarizer or a touch layer. The light source 20 is provided as an organic light emitting layer. A substrate 70 is disposed on the backlight side of the light source 20, and both surfaces of the functional layer 50 are respectively bonded to the display cover plate 60 and the encapsulation group 40 by optical glue 80. The refractive index of the first sealing layer 41 is about 1.8, and the refractive index of the organic layer 42 is about 1.4, and it is known from the fresnel formula that in the structure shown in fig. 8, a large amount of light is totally reflected at the interface between the first sealing layer 41 and the organic layer 42.
As shown in fig. 9, the optical structure 10 is formed in the package group 40 to isolate water and oxygen and prevent water and oxygen corrosion. In this configuration, air acts as the dielectric layer 30 into which the optical structure 10 exits. When the optical structure 10 is formed on the first encapsulation layer 41 on the surface facing the organic layer 42, the optical structure 10 and the first encapsulation layer 41 have an integrated structure, the organic layer 42 serves as the dielectric layer 30, the total reflection angle of the light is about 53 °, at least a portion of the light emitted by the light source 20 enters the protrusion 11 region of the optical structure 10 and is emitted into the organic layer 42, and the light emission rate is significantly improved. Here, the protrusions 11 of the optical structure 10 may be formed on the surface of the first encapsulation layer 41 facing the organic layer 42 by a dry etching process such as plasma bombardment, which may ensure the perpendicularity of the protrusions 11 with respect to the surface of the first encapsulation layer 41 as much as possible. And organic layer 42 can be prepared by ink jet printing leveling.
In the structure of the display module shown in fig. 9, the light sources 20 are discontinuous organic light emitting layers, each organic light emitting layer forms a pixel, the dimension of the protrusion 11 on the optical structure 10 parallel to the substrate 70 can be set to be greater than or equal to the pixel width or the pixel pitch (10-20 μm), which is equivalent to the dimension of the protrusion 11 similar to the pixel definition area, and the dimension of the protrusion 11 perpendicular to the substrate 70 can be set to be 5-10 μm.
In one possible implementation, as shown in fig. 10, the light source 20 is a discontinuous organic light emitting layer, and is formed with a pixel area a1 and a non-pixel area a2, and the protrusion 11 of the optical structure 10 corresponds to the non-pixel area a 2. In this structure, the display characteristics and normal display effects on the front surface of the non-pixel region a1 are not changed, but the optical path of the waveguide light exiting to the non-pixel region a2 is changed, and the exiting light is increased.
It should be understood that the optical structure 10 may be disposed in areas where the refractive indices of the interfaces differ significantly, and multiple layers of similar structures may be provided in concert.
Based on the optical structure 10, the embodiment of the present application further provides a manufacturing method for manufacturing any of the optical structures 10. As shown in fig. 11, the preparation method includes the steps of:
step S1: providing a structural body 1 arranged between the light source 20 and the medium layer 30, wherein the structural body 1 is provided with a first surface a1 facing one side of the light source 20 and a second surface a2 facing one side of the medium layer 30, so that the refractive index of the structural body 1 is higher than that of the medium layer 30, and the critical angle of total reflection of light rays emitted by the light source 20 at the interface of the structural body 1 is theta which is more than or equal to 45 degrees.
Step S2: a plurality of protrusions 11 are formed on the second surface a2 of the structural body 1.
Various implementations of step S2 are possible based on different implementations of the display components shown in fig. 5, 6, 9, and 10.
First, as shown in fig. 12, step S2 may include the following steps:
step S21: stamping a plurality of bulges 11 on the surface of the structure body 1 by adopting a template;
in a second mode, the optical structure 10 is formed on the surface of the display cover 60, as shown in fig. 13, and the step S2 may include the following steps:
step S22: the surface of the dry etching structure body 1 is formed with a plurality of protrusions 11. In this step, a plasma bombardment process may be specifically employed.
It will be apparent to those skilled in the art that various changes and modifications may be made in the embodiments of the present invention without departing from the spirit and scope of the invention. Thus, if such modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include such modifications and variations.
Claims (10)
1. An optical structure, comprising: the structure body is arranged between the light source and the medium layer;
the structure body is provided with a first surface facing one side of the light source and a second surface facing the medium layer, and a plurality of bulges are formed on the second surface;
the refractive index of the structure body is higher than that of the medium layer, the critical angle of the light emitted by the light source at the interface of the structure body and the medium layer for realizing total reflection is theta, and the theta is more than or equal to 45 degrees.
2. The optical structure of claim 1, wherein the protrusions are perpendicular to the second surface.
3. The optical structure according to claim 2, wherein the size of each of the protrusions satisfies the following condition:
wherein d is1The dimension of the projection perpendicular to the second surface, d2Is the dimension of the protrusion parallel to the second surface.
4. An optical structure according to claim 3, characterized in that the dimensions of each of said protrusions satisfy the following condition:
5. the optical structure of claim 1, wherein the size of the bottom surface of the protrusion is larger than the size of the top surface of the protrusion, and the orthographic projection of the top surface on the second surface falls within the orthographic projection of the bottom surface on the second surface.
6. The optical structure of claim 5, wherein the side surface of the protrusion is inclined from the second surface by an angle of 60-90 °, and the side surface is an inclined surface between the bottom surface and the top surface.
7. The optical structure according to any one of claims 1-6, wherein the optical structure corresponds to a non-pixel region;
the size of the protrusions perpendicular to the second surface is 5-10 μm, the size of the protrusions parallel to the second surface is 10-20 μm, and the distance between any two adjacent protrusions is 10-25 μm.
8. The optical structure according to any one of claims 1 to 6, wherein the protrusions are disposed on the second surface of the structural body at equal intervals over the entire surface, the size of the protrusions perpendicular to the second surface is 2 to 10 μm, the size of the protrusions parallel to the second surface is 3 to 10 μm, and the interval between any two adjacent protrusions is 5 to 10 μm.
9. A display assembly, comprising: a light source and a display module sequentially formed at one side of a light-emitting surface of the light source, wherein the display module is provided with the optical structure as claimed in any one of claims 1 to 8.
10. The display module according to claim 9, wherein the display module comprises a first encapsulating layer, an organic layer, a second encapsulating layer, a functional layer and a display cover plate, which are sequentially formed on one side of the light-emitting surface of the light source, and the refractive index of the first encapsulating layer is greater than that of the organic layer;
the optical structure is formed on the surface of the display cover plate, which faces away from the light source;
alternatively, the optical structure is formed on the surface of the first packaging layer facing the organic layer.
The refractive index of the first encapsulation layer is greater than the refractive index of the organic layer, the first encapsulation layer being formed with an optical structure according to any one of claims 1 to 8 on the side facing the organic layer.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| WO2023077260A1 (en) * | 2021-11-02 | 2023-05-11 | 京东方科技集团股份有限公司 | Display panel, preparation method therefor, and display device |
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| WO2023077260A1 (en) * | 2021-11-02 | 2023-05-11 | 京东方科技集团股份有限公司 | Display panel, preparation method therefor, and display device |
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