CN115274983A - Display panel - Google Patents

Abstract

The embodiment of the application discloses a display panel, which comprises a driving substrate, a plurality of light-emitting devices, a plurality of light-gathering elements and a plurality of light-scattering elements, wherein the light-emitting devices are arranged on the driving substrate. A light-gathering element is correspondingly arranged right above a light-emitting device; the plane where the driving substrate is located is taken as a projection plane, the orthographic projection of the light-emitting device is located in the orthographic projection of the light-condensing element, and the orthographic projection area of the light-emitting device is smaller than that of the light-condensing element; a light scattering element is correspondingly arranged right above a light gathering element. The display panel is provided with the light condensing element right above the light emitting device, and the size of the light condensing element is larger than that of the light emitting device, so that most of light rays emitted by the light emitting device are converged by the light condensing element, the risk of light ray crosstalk among the light emitting devices is reduced, and the loss of the light rays is reduced; the light scattering element is arranged right above the light gathering element, so that light converged by the light gathering element is scattered by the light scattering element, and the granular sensation of a picture is reduced.

Description

display panel

technical field

The present application relates to the field of display technology, in particular to a display panel.

Background technique

In the current light-emitting diode (LED) display panel, since the LED is provided with a scattering device, such as a Lambertian scattering cover, the light-emitting angle of the LED can reach 180°. However, due to the large light emitting angle of the LED, there is a relatively serious crosstalk phenomenon between the light sources; in addition, due to the concentrated light emission of the LED, the picture is severely grainy when displayed.

Contents of the invention

The embodiment of the present application provides a display panel, which can reduce the risk of crosstalk of light sources and serious picture graininess.

An embodiment of the present application provides a display panel, which includes:

drive substrate;

a plurality of light emitting devices, the light emitting devices are arranged on the driving substrate;

A plurality of concentrating elements, one of the concentrating elements is correspondingly arranged directly above one of the light emitting devices; with the plane where the driving substrate is located as the projection plane, the orthographic projection of the light emitting device is located directly on the front of the light concentrating element In projection, the orthographic area of the light emitting device is smaller than the orthographic area of the light concentrating element; and

A plurality of light-scattering elements, one of the light-scattering elements is correspondingly arranged directly above one of the light-concentrating elements.

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 light-scattering element is located within the orthographic projection of the light-concentrating element, and the orthographic projection area of the light-scattering element is smaller than the orthographic projection area of the light concentrating element.

Optionally, in some embodiments of the present application, the display panel further includes a first light-shielding layer, and a plurality of openings are opened on the first light-shielding layer, and one of the light-scattering elements is correspondingly arranged in one of the openings ; The area of the opening is smaller than the orthographic projection area of the light concentrating element.

Optionally, in some embodiments of the present application, the first light shielding layer shields a peripheral portion of the light concentrating element.

Optionally, in some embodiments of the present application, the display panel further includes an encapsulation layer, the encapsulation layer is disposed on the driving substrate and covers the light emitting device;

A side of the encapsulation layer away from the light-emitting device is recessed with a plurality of recessed grooves, one of the recessed grooves is correspondingly arranged directly above one of the light-emitting devices, and the light concentrating element is arranged in the recessed grooves;

The refractive index of the encapsulation layer is smaller than the refractive index of the light concentrating element.

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

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

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

Optionally, in some embodiments of the present application, both the concave groove and the receiving groove are arc-shaped grooves.

Optionally, in some embodiments of the present application, the display panel further includes a flat layer, the flat layer is disposed on the encapsulation layer and covers the light concentrating 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.

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.

The display panel of the embodiment of the present application includes a driving substrate, a plurality of light emitting devices, a plurality of light concentrating elements and a plurality of light scattering elements, and the light emitting devices are arranged on the driving substrate. A light concentrating element is correspondingly arranged directly above a light emitting device; 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 of the light concentrating element Area; a light-scattering element is correspondingly arranged directly above a light-gathering element.

The display panel of the embodiment of the present application adopts a light-concentrating element directly above the light-emitting device, and the size of the light-condensing element is larger than that of the light-emitting device, so that most of the light emitted by the light-emitting device is converged by the light-concentrating element, reducing the energy consumption of the light-emitting device. The risk of crosstalk between light rays and reduce the loss of light; the astigmatism element is arranged directly above the light concentrating element, so that the light converged by the light concentrating element is scattered by the astigmatism element, reducing the graininess of the picture.

Description of drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings that need to be used in the description of the embodiments will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of the present application. For those skilled in the art, other drawings can also be obtained based on these drawings without any creative effort.

FIG. 1 is a schematic structural diagram of a display panel provided in a first embodiment of the present application;

FIG. 2 is a light path diagram in the display panel provided by the first embodiment of the present application;

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;

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;

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;

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

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

Fig. 8 is a schematic diagram of step B6 in the manufacturing method of the display panel provided by the first embodiment of the present application;

FIG. 9 is a schematic structural diagram of a display panel provided by a second embodiment of the present application.

Detailed ways

The technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only some of the embodiments of the present application, not all of them. Based on the embodiments in this application, all other embodiments obtained by those skilled in the art without making creative efforts belong to the scope of protection of this application. In addition, it should be understood that the specific implementations described here are only used to illustrate and explain the present application, and are not intended to limit the present application. In this application, unless stated to the contrary, the used orientation words such as "up" and "down" usually refer to up and down in the actual use or working state of the device, specifically the direction of the drawing in the drawings ; while "inside" and "outside" refer to the outline of the device.

An embodiment of the present application provides a display panel, which will be described in detail below. It should be noted that the description sequence of the following embodiments is not intended to limit the preferred sequence of the embodiments.

Referring to FIG. 1 , a display panel 100 according to the first embodiment of the present application includes a driving substrate 11 , a plurality of light emitting devices 12 , a plurality of light concentrating elements 13 and a plurality of light scattering elements 14 .

The light emitting device 12 is disposed on the driving substrate 11 . A light concentrating element 13 is correspondingly disposed directly above a light emitting device 12 . Taking the plane where the driving substrate 11 is located as the projection plane, the orthographic projection of the light emitting device 12 is located 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 correspondingly disposed directly above a light-condensing element 13 .

Referring to FIG. 2 , the display panel 100 of the first embodiment of the present application adopts a light-condensing element 13 directly above the light-emitting device 12 , and the size of the light-condensing element 13 is larger than that of the light-emitting device 12 , so that the light emitted by the light-emitting device 12 Most of them are converged by the light-concentrating element 13, which reduces the risk of light crosstalk between the light-emitting devices 12 and reduces the loss of light; the light-scattering element 14 is arranged directly above the light-condensing element 13, so that the light-concentrating element 13 converges The light rays are scattered by the astigmatism element 14, which reduces the graininess of the picture.

Optionally, taking the plane where the driving substrate 11 is located as the projection plane, the orthographic projection of the light-diffusing element 14 is located within the orthographic projection of the light-condensing element 13 , and the orthographic projection area of the light-diffusing element 14 is smaller than the orthographic projection area of the light-condensing element 13 .

The planar size of the light-diffusing element 14 is made small to further reduce the risk of light crosstalk. Optionally, the plane pattern of the diffuser element 14 is the same as the plane pattern of the light emitting device 12 .

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 .

Optionally, the display panel 100 may further include a first light-shielding layer 15 . A plurality of openings 151 are defined on the first light shielding layer 15 . A light-diffusing 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 concentrating element 13 .

The first light-shielding layer 15 is used to shield the peripheral side of the light-scattering element 14, that is to say, the first light-shielding layer 15 is arranged between the light-emitting devices 12, so that the light with a large viewing angle is blocked, so as to reduce the light crosstalk of the light-emitting device 12. risk.

Optionally, the first light shielding layer 15 shields the peripheral portion of the light concentrating element 13 .

Using the first light shielding layer 15 to shield the peripheral portion of the light concentrating element 13 further reduces the risk of light crosstalk.

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

A side of the encapsulation layer 16 away from the light emitting device 12 is recessed with a plurality of recessed grooves 161 . A concave groove 161 is correspondingly disposed directly above a light emitting device 12 . The light concentrating element 13 is disposed in the concave groove 161 .

The refractive index of the encapsulation layer 16 is smaller than that of the light concentrating element 13 .

A recessed groove 161 is provided on the encapsulation layer 16, and the concentrating element 13 is disposed in the recessed groove 161; wherein the setting of the recessed groove 161 can accurately correspond to the light emitting device 12, so that the light concentrating element 13 and the light emitting device 12 are precisely aligned; in addition , forming the light concentrating element 13 in the concave groove 161 can prevent the light concentrating element 13 from moving.

In some embodiments, the display panel 100 can also save the encapsulation layer 16, that is, the light concentrating element 13 is arranged on the light emitting device 12 in a manner of being suspended in the middle and supported and fixed around in the structure of the film layer of the light concentrating element.

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

The second light shielding layer 17 is overlapped with the first light shielding layer 15 .

In the first embodiment, the second light-shielding layer 17 is arranged on the peripheral side of the light-concentrating element 13 , which further reduces the risk of crosstalk of light emitted by the light-emitting device 12 .

Optionally, the first light-shielding layer 15 includes a plurality of first light-shielding strips arranged at intervals, and one first light-shielding strip is 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, and a second light-shielding strip is arranged between two adjacent light-condensing elements 13 . The first shading strip and the second shading strip are overlapped.

Wherein, the width of the first shading strip is larger than the width of the second shading strip.

The second light-shielding strip is used to shield light from a larger viewing angle of the light-emitting device 12 , and the first light-shielding strip is used to shield light from a large viewing angle emitted from the light-diffusing element 14 and light passing through the light-gathering element 13 at a larger viewing angle. The light range blocked by the first shading strip is larger than the light range blocked by the second shading strip.

The first embodiment adopts the overlapping 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.

Optionally, the side of the encapsulation layer 16 away from the light-emitting device 12 is further recessed with a receiving groove 162 , and the receiving groove 162 is arranged between two adjacent recessed grooves 161 . The second light shielding layer 17 is disposed in the receiving groove 162 .

The setting of the receiving groove 162 can reduce the risk of ink overflowing to the recessed groove 161; in addition, the setting of the receiving groove 162 makes the second light-shielding layer 17 thicker and improves the effect of preventing light crosstalk.

Optionally, both the concave groove 161 and the receiving groove 162 are arc-shaped grooves. The concave groove 161 adopts an arc-shaped groove, and the light-condensing element 13 fits into the concave groove 161 , that is, the light-condensing element 13 is a convex lens, which improves the light-condensing effect of the light-condensing element 13 .

Optionally, the light-condensing element 13 is a biconvex lens, which further improves the light-condensing effect of the light-condensing element 13 .

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

Optionally, the display panel 100 further includes a flat layer 18 disposed on the encapsulation layer 16 and covering the light concentrating element 13 . The diffusing element 14 is arranged on a planarization layer 18 .

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

The flat layer 18 provides a flat surface for the first light-shielding layer 15 and the light-diffusing element 14 , which is convenient for setting the first light-shielding layer 15 and the light-diffusing element 14 .

In addition, the refractive index of the flat layer 18 is greater than or equal to the refractive index of the encapsulation layer 16 , so as to ensure that the effect of converging the light is still achieved after the light passes through the light concentrating element 13 .

Optionally, the refractive index of the flat layer 18 is greater than that of the light concentrating element 13, so as to further converge the light and improve the light concentrating effect.

Optionally, referring to FIG. 2 , the light-diffusing element 14 includes a light-transmitting body 141 and scattering particles 142 doped in the light-transmitting body 141 .

Optionally, the material of the scattering particles 142 may be aluminum, silver or other transparent particles.

The manufacturing method of the display panel of the first embodiment includes the following steps:

Step B1 , please refer to FIG. 3 , transfer the light emitting device 12 onto the driving substrate 11 .

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 Mini-LED or Micro-LED or the like.

Step B2 , please refer to FIG. 4 , forming an encapsulation layer 16 on the driving substrate 11 . The encapsulation layer 16 covers the light emitting device 12 .

Optionally, step B2 includes the following steps: emboss the encapsulation material onto the drive substrate 11 by molding, and form a recessed groove 161 corresponding to the light-emitting device 12 on the side of the encapsulation material layer away from the light-emitting device 12, and also Receiving grooves 162 between the concave grooves 161 may be formed.

Optionally, the cross section of the concave groove 161 is semi-elliptical. The material of the encapsulation layer 16 may be adhesive material, such as silica gel. The refractive index of the encapsulation layer 16 is less than 1.43, such as 1.4, 1.3 or 1.2.

Step B3 , please refer to FIG. 5 , forming the second light-shielding layer 17 in the receiving groove 162 .

Optionally, the second light-shielding layer 17 is formed in the receiving groove 162 by inkjet printing. The material of the second light-shielding layer 17 can be selected from epoxy resin or polyacetate resin, etc., and graphene is 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.

Optionally, the thickness of the second light-shielding layer 17 is between 5 microns and 20 microns, such as 5 microns, 10 microns, 15 microns or 20 microns.

Step B4 , please refer to FIG. 6 , forming the light concentrating element 13 on the encapsulation layer 16 .

Optionally, step B4 includes: first, forming a semi-polymeric adhesive material layer bd on the encapsulation layer 16 , and then using a mold to heat-press the semi-polymeric adhesive material layer bd to form the light concentrating element 13 .

The cross-sectional shape of the light concentrating element 13 may be an ellipse. The material of the light concentrating element 13 is a material with a high refractive index, 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.

Since the hot pressing process is adopted, the light concentrating elements 13 are integrally connected with the connecting portion 13a. The connection portion 13 a covers the second light shielding layer 17 . The connecting portion 13 a integrally formed with the light concentrating element 13 is used to connect and cover the second light shielding layer 17 to improve the stability of the light concentrating element 13 .

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

Step B5 , please refer to FIG. 7 , forming a flat layer 18 on the light concentrating element 13 .

Optionally, a layer of semi-polyglue material is used to hot press on the light concentrating element 13 . It can also be formed on the light concentrating element 13 by coating.

The material of the planarization layer 18 may be the same as that of the encapsulation layer 16 or different.

Step B6 , please refer to FIG. 8 , forming the light-diffusing element 14 and the first light-shielding layer 15 on the flat layer 18 .

Optionally, the light-diffusing element 14 and the first light-shielding layer 15 are respectively formed on the flat layer 18 by means of inkjet printing.

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

The material of the light-scattering element 14 includes epoxy resin or polyacetate resin, and is doped with light-scattering particles such as aluminum particles or silver particles.

Optionally, the thickness of the light-diffusing element 14 is between 5 and 20 microns, such as 5 microns, 10 microns, 15 microns or 20 microns.

In this way, the manufacturing process of the display panel 100 of the first embodiment is completed.

Please refer to FIG. 9 , compared with the display panel 100 of the first embodiment, the difference between the display panel 100 of the second embodiment and the display panel 100 of the first embodiment is that the first light-shielding layer 15 is saved, and The light emitting angle of the light diffusing element 14 is smaller than the light emitting angle of the light emitting device 12 .

The display panel 100 of the second embodiment reduces the risk of light crosstalk and reduces the graininess of the picture by limiting the light emitting angle of the light-diffusing element 14 .

The display panel 100 of the second embodiment of the present application includes a driving substrate 11 , a plurality of light emitting devices 12 , a plurality of light concentrating elements 13 and a plurality of light scattering elements 14 .

The light emitting device 12 is disposed on the driving substrate 11 . A light concentrating element 13 is correspondingly disposed directly above a light emitting device 12 . Taking the plane where the driving substrate 11 is located as the projection plane, the orthographic projection of the light emitting device 12 is located 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 correspondingly disposed directly above a light-condensing element 13 .

In the display panel 100 of the second embodiment of the present application, a light-condensing element 13 is arranged directly above the light-emitting device 12, and the size of the light-condensing element 13 is larger than that of the light-emitting device 12, so that most of the light emitted by the light-emitting device 12 is concentrated. The light element 13 converges, which reduces the risk of light crosstalk between the light-emitting devices 12 and reduces the loss of light; the light-scattering element 14 is arranged directly above the light-condensing element 13, so that the light converged by the light-condensing element 13 is absorbed by the light-scattering element 14 breaks up, reducing the graininess of the picture.

The above is a detailed introduction to a display panel provided by the embodiment of the present application. In this paper, specific examples are used to illustrate the principle and implementation of the present application. The description of the above embodiment is only used to help understand the method and method of the present application. Its core idea; at the same time, for those skilled in the art, according to the idea of this application, there will be changes in the specific implementation and application scope. In summary, the content of this specification should not be understood as limiting the application .

Claims (10)

1. A display panel, characterized in that, comprising: drive substrate; a plurality of light emitting devices, the light emitting devices are arranged on the driving substrate; A plurality of concentrating elements, one of the concentrating elements is correspondingly arranged directly above one of the light emitting devices; with the plane where the driving substrate is located as the projection plane, the orthographic projection of the light emitting device is located directly on the front of the light concentrating element In projection, the orthographic area of the light emitting device is smaller than the orthographic area of the light concentrating element; and A plurality of light-scattering elements, one of the light-scattering elements is correspondingly arranged directly above one of the light-concentrating elements. 2. The display panel according to claim 1, characterized in that, taking the plane where the driving substrate is located as a projection plane, the orthographic projection of the light-scattering element is located within the orthographic projection of the light-concentrating element, and the orthographic projection of the light-scattering element is The orthographic projection area is smaller than the orthographic projection area of the light concentrating element. 3. The display panel according to claim 2, characterized in that, the display panel further comprises a first light-shielding layer, a plurality of openings are opened on the first light-shielding layer, and one of the light-scattering elements is correspondingly arranged on one of the light-shielding layers. Inside the opening; the area of the opening is smaller than the orthographic projection area of the light concentrating element. 4 . The display panel according to claim 3 , wherein the first light shielding layer shields a peripheral portion of the light concentrating element. 5. The display panel according to any one of claims 1-4, wherein the display panel further comprises an encapsulation layer, the encapsulation layer is arranged on the driving substrate and covers the light emitting device; A side of the encapsulation layer away from the light-emitting device is recessed with a plurality of recessed grooves, one of the recessed grooves is correspondingly arranged directly above one of the light-emitting devices, and the light concentrating element is arranged in the recessed grooves; The refractive index of the encapsulation layer is smaller than the refractive index of the light concentrating element. 6. The display panel according to claim 5, wherein the display panel further comprises a second light-shielding layer, the second light-shielding layer is arranged on the encapsulation layer, and the second light-shielding layer is arranged on a corresponding Between the two adjacent light concentrating elements; The second light-shielding layer is overlapped with the first light-shielding layer. 7. The display panel according to claim 6, wherein a receiving groove is recessed on the side of the encapsulation layer away from the light-emitting device, and the receiving groove is provided in two adjacent recessed grooves Between; the second light-shielding layer is arranged in the receiving groove. 8. The display panel according to claim 7, wherein the concave groove and the receiving groove are arc-shaped grooves. 9. The display panel according to claim 5, characterized in that, the display panel further comprises a flat layer, the flat layer is arranged on the encapsulation layer and covers the light concentrating element; the light scattering element is arranged on on the flat layer; The refractive index of the planar layer is greater than or equal to the refractive index of the encapsulation layer. 10. The display panel according to claim 1, wherein the light-scattering element comprises a light-transmitting body and scattering particles doped in the light-transmitting body.

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