Display panel

Abstract

The embodiment of the present application discloses a display panel, which includes a driving substrate, a plurality of light-emitting devices, a plurality of focusing elements and a plurality of scattering elements, and the light-emitting devices are arranged on the driving substrate. A focusing element is correspondingly arranged directly above a light-emitting device; with the plane where the driving substrate is located as the projection plane, the orthographic projection of the light-emitting device is located within the orthographic projection of the focusing element, and the orthographic projection area of ​​the light-emitting device is smaller than the orthographic projection area of ​​the focusing element; a scattering element is correspondingly arranged directly above a focusing element. The display panel of the present application adopts a method of setting a focusing element directly above the light-emitting device, and the size of the focusing element is larger than the size of the light-emitting device, so that most of the light emitted by the light-emitting device is converged by the focusing element, reducing the risk of light crosstalk between the light-emitting devices and reducing light loss; a scattering element is arranged directly above the focusing element, so that the light converged by the focusing element is scattered by the scattering element, reducing the graininess of the picture.

Description

Technical Field

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

[0002] Current light-emitting diode (LED) display panels utilize diffusers, such as Lambertian diffusers, to extend the LED's light beam angle to 180°. However, this wide angle of illumination can lead to significant crosstalk between light sources. Furthermore, the concentrated light output from LEDs can cause a grainy image. Summary of the Invention

[0003] The embodiments of the present application provide a display panel that can reduce the risk of light source crosstalk and severe image graininess.

[0004] An embodiment of the present application provides a display panel, comprising:

[0005] Driver substrate;

[0006] a plurality of light emitting devices, wherein the light emitting devices are arranged on the driving substrate;

[0007] a plurality of light-concentrating elements, each of the light-concentrating elements being disposed directly above a corresponding light-emitting device; with the plane of the driving substrate being the projection plane, the orthographic projection of the light-emitting device is located within the orthographic projection of the light-concentrating element, and the orthographic projection area of ​​the light-emitting device is smaller than the orthographic projection area of ​​the light-concentrating element; and

[0008] A plurality of light-scattering elements are provided, wherein one light-scattering element is disposed directly above one of the light-focusing elements.

[0009] Optionally, in some embodiments of the present application, taking the plane where the driving substrate is located as the projection plane, the orthographic projection of the scattering element is located within the orthographic projection of the focusing element, and the orthographic projection area of ​​the scattering element is smaller than the orthographic projection area of ​​the focusing element.

[0010] Optionally, in some embodiments of the present application, the display panel further includes a first shading layer, a plurality of openings are provided on the first shading layer, and a scattering element is correspondingly arranged in one of the openings; the area of ​​the opening is smaller than the orthographic projection area of ​​the focusing element.

[0011] Optionally, in some embodiments of the present application, the first light-shielding layer blocks the peripheral portion of the focusing element.

[0012] Optionally, in some embodiments of the present application, the display panel further includes an encapsulation layer, which is provided on the driving substrate and covers the light-emitting device;

[0013] A plurality of recessed grooves are formed on a side of the encapsulation layer away from the light emitting device, wherein one recessed groove is correspondingly arranged directly above one of the light emitting devices, and the focusing element is arranged in the recessed groove;

[0014] The refractive index of the encapsulation layer is smaller than the refractive index of the focusing element.

[0015] Optionally, in some embodiments of the present application, the display panel further includes a second light-shielding layer, wherein the second light-shielding layer is disposed on the encapsulation layer and between two adjacent light-concentrating elements;

[0016] The second light-shielding layer is overlapped with the first light-shielding layer.

[0017] Optionally, in some embodiments of the present application, a receiving groove is further provided on a side of the encapsulation layer away from the light-emitting device, and the receiving groove is arranged between two adjacent recessed grooves; and the second light-shielding layer is arranged in the receiving groove.

[0018] Optionally, in some embodiments of the present application, the recessed groove and the accommodating groove are both arc-shaped grooves.

[0019] Optionally, in some embodiments of the present application, the display panel further includes a flat layer, the flat layer being disposed on the encapsulation layer and covering the light-collecting element; the light-scattering element being disposed on the flat layer;

[0020] The refractive index of the planar layer is greater than or equal to the refractive index of the encapsulation layer.

[0021] Optionally, in some embodiments of the present application, the light scattering element includes a light-transmitting body and scattering particles doped in the light-transmitting body.

[0022] The display panel of an embodiment of the present application includes a driving substrate, a plurality of light-emitting devices, a plurality of light-collecting elements, and a plurality of light-scattering elements. The light-emitting devices are disposed on the driving substrate. A light-collecting element is disposed directly above each light-emitting device. With the plane of the driving substrate as the projection plane, the orthographic projection of the light-emitting device is within the orthographic projection of the light-collecting element, and the orthographic projection area of ​​the light-emitting device is smaller than the orthographic projection area of ​​the light-collecting element. A light-scattering element is disposed directly above each light-collecting element.

[0023] The display panel of the embodiment of the present application adopts a focusing element arranged directly above the light-emitting device, and the size of the focusing element is larger than the size of the light-emitting device, so that most of the light emitted by the light-emitting device is converged by the focusing element, reducing the risk of light crosstalk between the light-emitting devices and reducing light loss; a scattering element is arranged directly above the focusing element, so that the light converged by the focusing element is scattered by the scattering element, reducing the graininess of the picture. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present application. For those skilled in the art, other drawings can be obtained based on these drawings without creative work.

[0025] Figure 1 is a schematic structural diagram of a display panel provided in the first embodiment of the present application;

[0026] Figure 2 is a light path diagram in the display panel provided in the first embodiment of the present application;

[0027] Figure 3 is a schematic diagram of step B1 in the method for manufacturing a display panel provided in the first embodiment of the present application;

[0028] Figure 4 is a schematic diagram of step B2 in the method for manufacturing a display panel provided in the first embodiment of the present application;

[0029] Figure 5 is a schematic diagram of step B3 in the method for manufacturing a display panel provided in the first embodiment of the present application;

[0030] Figure 6 is a schematic diagram of step B4 in the method for manufacturing a display panel provided in the first embodiment of the present application;

[0031] Figure 7 is a schematic diagram of step B5 in the method for manufacturing a display panel provided in the first embodiment of the present application;

[0032] Figure 8 is a schematic diagram of step B6 in the method for manufacturing a display panel provided in the first embodiment of the present application;

[0033] Figure 9 2 is a schematic structural diagram of a display panel provided in the second embodiment of the present application. DETAILED DESCRIPTION

[0034] The technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without making creative work are within the scope of protection of the present application. In addition, it should be understood that the specific implementation methods described herein are only used to illustrate and explain the present application, and are not used to limit the present application. In the present application, unless otherwise specified, the directional words used, such as "upper" and "lower", generally refer to the upper and lower parts of the device in actual use or working state, specifically the drawing direction in the accompanying drawings; and "inside" and "outside" refer to the outline of the device.

[0035] The present application provides a display panel, which is described in detail below. It should be noted that the order of description of the following embodiments does not limit the preferred order of the embodiments.

[0036] Please refer to Figure 1 The display panel 100 of the first embodiment of the present application includes a driving substrate 11, a plurality of light-emitting devices 12, a plurality of light-condensing elements 13 and a plurality of light-scattering elements 14.

[0037] A light-emitting device 12 is disposed on a drive substrate 11. A light-concentrating element 13 is disposed directly above each light-emitting device 12. With the plane of the drive substrate 11 as the projection plane, the orthographic projection of the light-emitting device 12 lies within the orthographic projection of the light-concentrating element 13; the orthographic projection area of ​​the light-emitting device 12 is smaller than the orthographic projection area of ​​the light-concentrating element 13. A light-scattering element 14 is disposed directly above each light-concentrating element 13.

[0038] Please refer to Figure 2 The display panel 100 of the first embodiment of the present application adopts a method of setting a focusing element 13 directly above the light-emitting device 12, and the size of the focusing element 13 is larger than the size of the light-emitting device 12, so that most of the light emitted by the light-emitting device 12 is converged by the focusing element 13, reducing the risk of light crosstalk between the light-emitting devices 12 and reducing light loss; a scattering element 14 is set directly above the focusing element 13, so that the light converged by the focusing element 13 is scattered by the scattering element 14, reducing the graininess of the picture.

[0039] Optionally, taking the plane where the driving substrate 11 is located as the projection plane, the orthographic projection of the light-scattering element 14 is located within the orthographic projection of the light-collecting element 13 , and the orthographic projection area of ​​the light-scattering element 14 is smaller than the orthographic projection area of ​​the light-collecting element 13 .

[0040] The planar size of the light scattering element 14 is made smaller to further reduce the risk of light crosstalk. Optionally, the planar pattern of the light scattering element 14 is the same as the planar pattern of the light emitting device 12.

[0041] Optionally, the center distance between any two light scattering elements 14 is equal to the center distance between any two light emitting devices 12 , so as to maintain the consistency of the resolution of the display panel 100 .

[0042] Optionally, the display panel 100 may further include a first light shielding layer 15 . The first light shielding layer 15 is provided with a plurality of openings 151 . A light scattering element 14 is correspondingly disposed in an opening 151 . The area of ​​the opening 151 is smaller than the orthographic projection area of ​​the light focusing element 13 .

[0043] The first shading layer 15 is used to block the peripheral side of the light scattering element 14 , that is, the first shading layer 15 is set between the light emitting devices 12 so that light with a large viewing angle is blocked, thereby reducing the risk of light crosstalk of the light emitting devices 12 .

[0044] Optionally, the first light-shielding layer 15 blocks the peripheral portion of the light-concentrating element 13 .

[0045] The first light shielding layer 15 is used to shield the peripheral portion of the focusing element 13, thereby further reducing the risk of light crosstalk.

[0046] Optionally, the display panel 100 further includes an encapsulation layer 16 , which is disposed on the driving substrate 11 and covers the light-emitting device 12 .

[0047] A plurality of recessed grooves 161 are formed on a side of the encapsulation layer 16 away from the light emitting device 12. Each recessed groove 161 is correspondingly disposed directly above a light emitting device 12. The focusing element 13 is disposed in each recessed groove 161.

[0048] The refractive index of the encapsulation layer 16 is lower than the refractive index of the light concentrating element 13 .

[0049] A recessed groove 161 is provided on the encapsulation layer 16, and the focusing element 13 is provided in the recessed groove 161; wherein the recessed groove 161 is provided so as to precisely correspond to the light-emitting device 12, so that the focusing element 13 and the light-emitting device 12 are precisely aligned; in addition, the focusing element 13 is formed in the recessed groove 161, so as to prevent the focusing element 13 from moving.

[0050] In some embodiments, the display panel 100 may also omit the encapsulation layer 16 , that is, the focusing element 13 is provided on the light emitting device 12 in a manner of being suspended in the middle and supported and fixed on all sides in the structure of a focusing element film layer.

[0051] Optionally, the display panel 100 further includes a second light shielding layer 17 , which is disposed on the encapsulation layer 16 . The second light shielding layer 17 is disposed between two adjacent light focusing elements 13 .

[0052] The second light-shielding layer 17 is disposed overlapping with the first light-shielding layer 15 .

[0053] In the first embodiment, the second light shielding layer 17 is provided on the peripheral side of the light focusing element 13 , which further reduces the risk of crosstalk of the light emitted by the light emitting device 12 .

[0054] Optionally, the first light-shielding layer 15 includes a plurality of first light-shielding strips arranged at intervals, with one first light-shielding strip being arranged between two adjacent light-scattering elements 14. The second light-shielding layer 17 includes a plurality of second light-shielding strips arranged at intervals, with one second light-shielding strip being arranged between two adjacent light-focusing elements 13. The first light-shielding strips and the second light-shielding strips are arranged to overlap.

[0055] Wherein, the width of the first shading strip is greater than the width of the second shading strip.

[0056] The second light shielding strip is used to block the light of the light emitting device 12 with a large viewing angle, and the first light shielding strip is used to block the light of the light emitting device 12 with a large viewing angle emitted from the light diffusing element 14 and the light of the light condensing element 13 with a large viewing angle. The range of light blocked by the first light shielding strip is larger than the range of light blocked by the second light shielding strip.

[0057] The first embodiment adopts the superposition arrangement of the first light-shielding layer 15 and the second light-shielding layer 17 , which not only improves and reduces the risk of light crosstalk, but also improves the display contrast.

[0058] Optionally, a receiving groove 162 is further provided on a side of the encapsulation layer 16 away from the light emitting device 12 , and the receiving groove 162 is provided between two adjacent recessed grooves 161 . The second light shielding layer 17 is provided in the receiving groove 162 .

[0059] The provision of the receiving groove 162 can reduce the risk of ink overflowing into the recessed groove 161 ; in addition, the provision of the receiving groove 162 allows the second light shielding layer 17 to be thicker, thereby improving the effect of preventing light crosstalk.

[0060] Optionally, the recessed groove 161 and the receiving groove 162 are both arc-shaped grooves. The recessed groove 161 is an arc-shaped groove, and the focusing element 13 fits the recessed groove 161, that is, the focusing element 13 is a convex lens, which improves the focusing effect of the focusing element 13.

[0061] Optionally, the focusing element 13 is a double convex lens, which further improves the focusing effect of the focusing element 13.

[0062] Optionally, the cross-sectional shape of the light-concentrating element 13 may also be an ellipse, a semicircle, or other shapes with a free-form surface.

[0063] Optionally, the display panel 100 further includes a planar layer 18 , which is disposed on the encapsulation layer 16 and covers the light-collecting element 13 . The light-scattering element 14 is disposed on the planar layer 18 .

[0064] The refractive index of the planar layer 18 is greater than or equal to the refractive index of the encapsulation layer 16 .

[0065] The flat layer 18 provides a flat surface for the first light-shielding layer 15 and the light-scattering element 14 , thereby facilitating the arrangement of the first light-shielding layer 15 and the light-scattering element 14 .

[0066] In addition, the refractive index of the flat layer 18 is greater than or equal to the refractive index of the encapsulation layer 16 , ensuring that the light can still converge after passing through the focusing element 13 .

[0067] Optionally, the refractive index of the flat layer 18 is greater than the refractive index of the focusing element 13 to further converge the light and improve the focusing effect.

[0068] Optional, please refer to Figure 2 The light scattering element 14 includes a light-transmitting body 141 and scattering particles 142 doped in the light-transmitting body 141 .

[0069] Optionally, the scattering particles 142 may be made of aluminum, silver, or other transparent particles.

[0070] The method for manufacturing the display panel of the first embodiment includes the following steps:

[0071] Step B1, please refer to Figure 3 , transfer the light emitting device 12 to the driving substrate 11.

[0072] Optionally, the driving substrate 11 includes a driving circuit for driving the light emitting device 12 to emit light. In addition, the light emitting device 12 may be a Mini-LED or Micro-LED.

[0073] Step B2, please refer to Figure 4 , an encapsulation layer 16 is formed on the driving substrate 11 . The encapsulation layer 16 covers the light emitting device 12 .

[0074] Optionally, step B2 includes the following steps: imprinting the packaging material onto the driving substrate 11 by molding, and forming a recessed groove 161 corresponding to the light-emitting device 12 on the side of the packaging material layer away from the light-emitting device 12, and also forming a receiving groove 162 located between the recessed grooves 161.

[0075] Optionally, the cross section of the concave groove 161 is semi-elliptical. The material of the encapsulation layer 16 can be a plastic material, such as silicone, etc. The refractive index of the encapsulation layer 16 is less than 1.43, for example, it can be 1.4, 1.3 or 1.2.

[0076] Step B3, please refer to Figure 5 , a second light shielding layer 17 is formed in the receiving groove 162 .

[0077] Optionally, inkjet printing is used to form the second light shielding layer 17 in the receiving groove 162. The material of the second light shielding layer 17 can be selected from epoxy resin or polyacetic acid resin, and graphene can be doped therein, so that the second light shielding layer 17 not only has a light shielding effect, but also has a strong heat dissipation effect.

[0078] Optionally, the thickness of the second light-shielding layer 17 is between 5 micrometers and 20 micrometers, for example, 5 micrometers, 10 micrometers, 15 micrometers or 20 micrometers.

[0079] Step B4, please refer to Figure 6 , a focusing element 13 is formed on the packaging layer 16.

[0080] Optionally, step B4 includes: first, forming a semi-polyglue layer bd on the packaging layer 16 , and then using a mold to hot-press the semi-polyglue layer bd to form the focusing element 13 .

[0081] The cross-section of the light-concentrating element 13 may be elliptical. The light-concentrating element 13 is made of a high-refractive-index material, such as PMMA. The refractive index of the light-concentrating element 13 is greater than 1.59, such as 1.6, 1.7, 1.8, or 1.9.

[0082] Due to the hot pressing process, the light concentrating elements 13 are integrally connected with a connecting portion 13a, which covers the second light shielding layer 17. The connecting portion 13a, which is integrally formed with the light concentrating elements 13, is connected to and covers the second light shielding layer 17 to improve the stability of the light concentrating elements 13.

[0083] In some embodiments, the connecting portion 13 a may also be omitted.

[0084] Step B5, please refer to Figure 7 , a flat layer 18 is formed on the focusing element 13 .

[0085] Optionally, a semi-polyglue layer is hot pressed onto the light focusing element 13. Alternatively, the light focusing element 13 may be formed by coating.

[0086] The material of the planar layer 18 may be the same as or different from the material of the encapsulation layer 16 .

[0087] Step B6, please refer to Figure 8 , a light scattering element 14 and a first light shielding layer 15 are formed on the flat layer 18 .

[0088] Optionally, the light scattering element 14 and the first light shielding layer 15 are formed on the flat layer 18 respectively by inkjet printing.

[0089] The materials of the first light-shielding layer 15 and the second light-shielding layer 17 may be the same or different.

[0090] The material of the light-scattering element 14 includes epoxy resin or polyacetic acid resin, etc., and light-scattering particles such as aluminum particles or silver particles are doped therein.

[0091] Optionally, the thickness of the light scattering element 14 is between 5 and 20 microns, for example, 5 microns, 10 microns, 15 microns or 20 microns.

[0092] This completes the manufacturing process of the display panel 100 of the first embodiment.

[0093] Please refer to Figure 9 Compared with the display panel 100 of the first embodiment, the display panel 100 of the second embodiment is different from the display panel 100 of the first embodiment in that the first light shielding layer 15 is saved, and the light emitting angle of the light scattering element 14 is smaller than the light emitting angle of the light emitting device 12.

[0094] The display panel 100 of the second embodiment reduces the risk of light crosstalk and the graininess of the image by limiting the light emission angle of the light diffusion element 14 .

[0095] The display panel 100 according to the second embodiment of the present application includes a driving substrate 11 , a plurality of light-emitting devices 12 , a plurality of light-condensing elements 13 , and a plurality of light-scattering elements 14 .

[0096] A light-emitting device 12 is disposed on a drive substrate 11. A light-concentrating element 13 is disposed directly above each light-emitting device 12. With the plane of the drive substrate 11 as the projection plane, the orthographic projection of the light-emitting device 12 lies within the orthographic projection of the light-concentrating element 13; the orthographic projection area of ​​the light-emitting device 12 is smaller than the orthographic projection area of ​​the light-concentrating element 13. A light-scattering element 14 is disposed directly above each light-concentrating element 13.

[0097] The display panel 100 of the second embodiment of the present application adopts a focusing element 13 set directly above the light-emitting device 12, and the size of the focusing element 13 is larger than the size of the light-emitting device 12, so that most of the light emitted by the light-emitting device 12 is converged by the focusing element 13, reducing the risk of light crosstalk between the light-emitting devices 12 and reducing light loss; a scattering element 14 is set directly above the focusing element 13, so that the light converged by the focusing element 13 is scattered by the scattering element 14, reducing the graininess of the picture.

[0098] The above is a detailed introduction to a display panel provided in an embodiment of the present application. Specific examples are used herein to illustrate the principles and implementation methods of the present application. The description of the above embodiments is only used to help understand the method of the present application and its core idea. At the same time, for those skilled in the art, based on the ideas of the present application, there may be changes in the specific implementation methods and application scope. In summary, the content of this specification should not be understood as a limitation on the present application.

Claims

1. A display panel, characterized in that: include: Driver substrate; a plurality of light emitting devices, wherein the light emitting devices are arranged on the driving substrate; A plurality of light-concentrating elements, wherein one of the light-concentrating elements is disposed directly above one of the light-emitting devices; Taking the plane where the driving substrate is located as the projection plane, the orthographic projection of the light-emitting device is located within the orthographic projection of the light-concentrating element, and the orthographic projection area of ​​the light-emitting device is smaller than the orthographic projection area of ​​the light-concentrating element; as well as A plurality of light-scattering elements, wherein one of the light-scattering elements is disposed directly above one of the light-focusing elements; Taking the plane where the driving substrate is located as the projection plane, the orthographic projection of the light-scattering element is located within the orthographic projection of the light-collecting element, and the orthographic projection area of ​​the light-scattering element is smaller than the orthographic projection area of ​​the light-collecting element; The display panel further includes a first light-shielding layer having a plurality of openings formed therein, wherein each of the light-scattering elements is disposed in a corresponding one of the openings; the area of ​​each opening is smaller than the orthographic projection area of ​​the light-concentrating element, and the first light-shielding layer shields a peripheral portion of the light-concentrating element; The display panel further includes an encapsulation layer, which is disposed on the driving substrate and covers the light emitting device; A plurality of recessed grooves are formed on a side of the encapsulation layer away from the light emitting device, wherein one recessed groove is correspondingly arranged directly above one of the light emitting devices, and the focusing element is arranged in the recessed groove; The refractive index of the encapsulation layer is smaller than the refractive index of the focusing element.

2. The display panel according to claim 1, wherein: The display panel further includes a second light shielding layer, which is disposed on the encapsulation layer and between two adjacent light-concentrating elements; The second light-shielding layer is overlapped with the first light-shielding layer.

3. The display panel according to claim 2, wherein: A receiving groove is further provided on a side of the encapsulation layer away from the light emitting device, and the receiving groove is arranged between two adjacent recessed grooves; the second light shielding layer is arranged in the receiving groove.

4. The display panel according to claim 3, wherein: The recessed groove and the accommodating groove are both arc-shaped grooves.

5. The display panel according to claim 1, wherein: The display panel further includes a flat layer, which is disposed on the encapsulation layer and covers the light-collecting element; the light-scattering element is disposed on the flat layer; The refractive index of the planar layer is greater than or equal to the refractive index of the encapsulation layer.

6. The display panel according to claim 1, wherein: The light scattering element includes a light-transmitting body and scattering particles doped in the light-transmitting body.

Images