Display panel and preparation method thereof

Abstract

The invention provides a display panel and a preparation method thereof. The problem that in the prior art, large-viewing-angle light of a display panel is lost or power consumption of the display panel is high is solved. The display panel includes: a substrate; the light-emitting device is positioned on one side of the substrate; the color conversion layer is located on the side, away from the substrate, of the light-emitting device, the orthographic projection of the color conversion layer on the substrate and the orthographic projection of the light-emitting device on the substrate are at least partially overlapped, the color conversion layer comprises a central area and an edge area surrounding the central area, and the color conversion layer comprises a first light condensation unit located in the edge area. The first condensation unit is arranged in the edge area of the color conversion layer, so that large-viewing-angle light rays projected to the color conversion layer by the light emitting device can be gathered, the utilization rate of the large-viewing-angle light rays is improved, and the power consumption of the display panel can be reduced.

Description

Technical Field

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

[0002] Current display panels, such as organic electroluminescence display (OLED) display panels with backlight sources, can have large sizes and good viewing angle light effects. However, due to the limitations of the display panel structure, existing display panels will inevitably lose more large viewing angle light, affecting the display effect and consuming more power. Summary of the invention

[0003] In view of this, an embodiment of the present application provides a display panel and a method for manufacturing the same, which solves the problem of light loss at a large viewing angle of the display panel or high power consumption of the display panel in the prior art.

[0004] In a first aspect, the present application provides a display panel, the display panel comprising:

[0005] substrate;

[0006] A light emitting device is located on one side of the substrate;

[0007] The color conversion layer is located on a side of the light-emitting device away from the substrate, the orthographic projection of the color conversion layer on the substrate at least partially overlaps with the orthographic projection of the light-emitting device on the substrate, the color conversion layer includes a central area and an edge area surrounding the central area, and the color conversion layer includes a first focusing unit located in the edge area.

[0008] In one embodiment, the first light focusing unit includes a plurality of first light focusing sub-units, and the first light focusing sub-units surround at least a portion of the central area;

[0009] Preferably, among the adjacent first photon-concentrating sub-units, the first photon-concentrating sub-units far from the central region surround the first photon-concentrating sub-units close to the central region;

[0010] Preferably, the first photon focusing sub-unit comprises a second surface, and the second surface is an arc surface with an opening toward the central area;

[0011] Preferably, the cut angle of the second surface at the end point close to the substrate is 55 to 65°, preferably 60°;

[0012] Preferably, the first photon focusing subunit further comprises a first surface, the first surface intersects with a second surface; the second surface is located on a side of the first surface away from the central area;

[0013] Preferably, the first surface is an arc surface with an opening toward the central area;

[0014] Preferably, in two adjacent first photon-concentrating sub-units, the second surface of the first photon-concentrating sub-unit close to the central region intersects with the first surface of the first photon-concentrating sub-unit far from the central region;

[0015] Preferably, the surface of the color conversion layer in the central region away from the substrate is parallel to the plane where the substrate is located;

[0016] Preferably, in a direction parallel to the substrate, the ratio of the width of the edge region to the width of the central region is 1:(8-12);

[0017] Preferably, in a direction parallel to the substrate, a ratio of a width of the edge region to a width of the central region is 1:(9-11).

[0018] In one embodiment, the color conversion layer includes a first color conversion unit, a second color conversion unit and a transmission unit, at least one of the first color conversion unit, the second color conversion unit and the transmission unit includes a central area and an edge area, or,

[0019] The color conversion layer includes a first color conversion unit, a second color conversion unit, a third color conversion unit and a transmission unit, at least one of the first color conversion unit, the second color conversion unit, the third color conversion unit and the transmission unit includes a central area and an edge area;

[0020] Preferably, the display panel further comprises an isolation structure, the isolation structure is located on a side of the light emitting device away from the substrate, the isolation structure has a plurality of openings, and the color conversion layer is located in the openings.

[0021] In one embodiment, the display panel further includes: a color filter layer, located on a side of the color conversion layer away from the substrate, the color filter layer including a plurality of color filter units, the orthographic projection of the color filter unit on the substrate covering the orthographic projection of the color conversion layer on the substrate;

[0022] The color film unit includes a second light focusing unit;

[0023] Preferably, the second light focusing unit includes a plurality of second photon focusing units, and among adjacent second photon focusing units, the second photon focusing unit far from the centroid of the color film unit surrounds the second photon focusing unit close to the centroid of the color film unit;

[0024] Preferably, the second photon focusing unit comprises a third surface, and the third surface is an arc surface with an opening toward the centroid;

[0025] Preferably, the cutting angle of the third surface at the end point close to the substrate is 55-65°, preferably 60°;

[0026] Preferably, the second photon focusing unit further comprises a fourth surface, the third surface is located on a side of the fourth surface away from the centroid of the color filter unit, and the third surface and the fourth surface intersect;

[0027] Preferably, the fourth surface is an arc surface with its opening facing the centroid;

[0028] Preferably, in two adjacent second photon-concentrating sub-units, the third surface of the second photon-concentrating sub-unit close to the centroid of the color filter unit intersects with the fourth surface of the second photon-concentrating sub-unit far from the centroid of the color filter unit;

[0029] Preferably, the color film unit further comprises a protruding structure, and the second photon focusing unit surrounds the protruding structure;

[0030] Preferably, the second photon focusing unit is symmetrical about the central axis of the color filter unit, and the protruding structure is symmetrical about the central axis of the color filter unit;

[0031] Preferably, the display panel further comprises a cover plate, which is located on a side of the color film unit facing away from the substrate;

[0032] Preferably, the cover plate fills the gap between adjacent second photon-concentrating sub-units, and / or the cover plate fills the gap between the second photon-concentrating sub-units and the protruding structure;

[0033] Preferably, the refractive index of the cover plate is smaller than the refractive index of the color film unit.

[0034] In one embodiment, the display panel further comprises a covering layer located on a side of the color conversion layer away from the substrate, and the refractive index of the covering layer is smaller than the refractive index of the color conversion layer;

[0035] Preferably, the first light-concentrating unit comprises a plurality of first light-concentrating sub-units, and the first light-concentrating sub-units surround at least a portion of the central area; the covering layer fills the gaps between adjacent first light-concentrating sub-units;

[0036] Preferably, the difference in refractive index between the color conversion layer and the cover layer is 0.2 to 0.4;

[0037] Preferably, the material of the cover layer includes silicon nitride.

[0038] A second aspect of the present application provides a display panel, the display panel comprising:

[0039] substrate;

[0040] A light emitting device is located on one side of the substrate;

[0041] A color conversion layer is located on a side of the light emitting device away from the substrate, and an orthographic projection of the color conversion layer on the substrate at least partially overlaps with an orthographic projection of the light emitting device on the substrate;

[0042] The color filter layer is located on a side of the color conversion layer away from the substrate, the color filter layer includes a plurality of color filter units, and the orthographic projection of the color filter unit on the substrate covers the orthographic projection of the color conversion layer on the substrate;

[0043] The color filter unit includes a second light focusing unit.

[0044] In one embodiment, the second light focusing unit includes a plurality of second light focusing sub-units, and among adjacent second light focusing sub-units, the second light focusing sub-units far from the centroid of the color filter unit surround the second light focusing sub-units close to the centroid of the color filter unit;

[0045] Preferably, the second photon focusing unit comprises a third surface, and the third surface is an arc surface with an opening toward the centroid;

[0046] Preferably, the cutting angle of the third surface at the end point close to the substrate is 55-65°, preferably 60°;

[0047] Preferably, the second photon focusing unit further comprises a fourth surface, the third surface is located on a side of the fourth surface away from the centroid of the color filter unit, and the third surface and the fourth surface intersect;

[0048] Preferably, the fourth surface is an arc surface with its opening facing the centroid;

[0049] Preferably, in two adjacent second photon-concentrating sub-units, the third surface of the second photon-concentrating sub-unit close to the centroid of the color filter unit intersects with the fourth surface of the photon-concentrating sub-unit far from the centroid of the color filter unit;

[0050] Preferably, the color film unit further comprises a protruding structure, and the second photon focusing unit surrounds the protruding structure;

[0051] Preferably, the second photon focusing unit is symmetrical about the central axis of the color filter unit, and the protruding structure is symmetrical about the central axis of the color filter unit;

[0052] Preferably, the display panel further comprises a cover plate, which is located on a side of the color film unit facing away from the substrate;

[0053] Preferably, the refractive index of the cover plate is smaller than the refractive index of the color film unit.

[0054] A third aspect of the present application provides a method for preparing a display panel, the method comprising:

[0055] preparing a light emitting device on one side of the substrate;

[0056] A color conversion layer is prepared on a side of the light-emitting device away from the substrate, the orthographic projection of the color conversion layer on the substrate at least partially overlaps with the orthographic projection of the light-emitting device on the substrate, the color conversion layer includes a central area and an edge area surrounding the central area, and the color conversion layer includes a first focusing unit located in the edge area.

[0057] In one embodiment, preparing a color conversion layer on a side of the light emitting device away from the substrate comprises:

[0058] Prepare a color conversion material layer on a side of the light emitting device away from the substrate;

[0059] Disposing a first mask plate on a surface of the color conversion material layer away from the substrate;

[0060] Based on the first mask plate, the color conversion material layer is patterned to obtain a color conversion layer.

[0061] In one embodiment, the method for manufacturing a display panel further includes: preparing a color filter layer on a side of the color conversion layer away from the substrate, the color filter layer including a plurality of color filter units, and a second light focusing unit is disposed on a surface of the color filter unit away from the substrate;

[0062] Preferably, preparing a color filter layer on a side of the color conversion layer away from the substrate comprises:

[0063] A color film unit material layer is prepared on a side of the color conversion layer away from the substrate;

[0064] A second mask is arranged on a surface of the color filter unit material layer away from the substrate;

[0065] Based on the second mask plate, the color filter unit material layer is patterned to obtain a color filter unit.

[0066] In the display panel of the embodiment of the present application, a first focusing unit is arranged in the edge area of ​​the color conversion layer, which can focus the light with a wide viewing angle projected by the light-emitting device to the color conversion layer, improve the utilization rate of the light with a wide viewing angle, and reduce the power consumption of the display panel; at the same time, the first focusing unit can also optimize the propagation path of the light emitted from the color conversion layer, reduce the crosstalk between the light emitted from the color conversion layer, reduce the risk of color deviation of the display panel, and improve the display hue of the display panel. BRIEF DESCRIPTION OF THE DRAWINGS

[0067] Figure 1 It is a schematic diagram of the cross-sectional structure of a display panel in one embodiment of the present application.

[0068] Figure 2 It is a schematic diagram of a partial top view of the color conversion layer in one embodiment of the present application.

[0069] Figure 3 This is a schematic diagram of the cross-sectional structure of a display panel in another embodiment of the present application.

[0070] Figure 4 This is a schematic diagram of the cross-sectional structure of a display panel in another embodiment of the present application.

[0071] Figure 5 This is a schematic diagram of the cross-sectional structure of a display panel in another embodiment of the present application.

[0072] Figure 6 It is a schematic diagram of a partial top view of the color film unit in one embodiment of the present application.

[0073] Figure 7This is a schematic diagram of the cross-sectional structure of a display panel in another embodiment of the present application.

[0074] Figure 8 This is a schematic diagram of the cross-sectional structure of a display panel in another embodiment of the present application.

[0075] Fig. 9 The figure is a schematic flow chart of a method for preparing a display panel in one embodiment of the present application.

[0076] Fig.10 It is a schematic diagram of transmittance of a cross section of a first mask in different regions in one embodiment of the present application.

[0077] Fig.11 This is a schematic flow chart of a method for preparing a display panel in another embodiment of the present application.

[0078] Fig.12 It is a schematic diagram of transmittance of a cross section of the second mask in different regions in one embodiment of the present application. DETAILED DESCRIPTION

[0079] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions 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 ordinary technicians in this field without creative work are within the scope of protection of this application.

[0080] In addition, in order to better illustrate the present application, numerous specific details are given in the following specific embodiments. It should be understood by those skilled in the art that the present application can also be implemented without certain specific details. In some examples, methods and means well known to those skilled in the art are not described in detail in order to highlight the subject matter of the present application.

[0081] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0082] In addition, the terms “first”, “second”, etc., if used, are merely used to distinguish between the descriptions and should not be understood as indicating or implying relative importance.

[0083] The present application provides a display panel according to a first aspect. Figure 1The structural schematic diagram of the display panel shown in the figure comprises: a substrate 100; a light-emitting device 200, which is located on one side of the substrate 100; a color conversion layer 300, which is located on a side of the light-emitting device 200 away from the substrate 100, wherein the orthographic projection of the color conversion layer 300 on the substrate 100 at least partially overlaps with the orthographic projection of the light-emitting device 200 on the substrate 100, the color conversion layer 300 comprises a central area 310 and an edge area 320 surrounding the central area 310, and the color conversion layer 300 comprises a first focusing unit 330 located in the edge area 320.

[0084] In the display panel of the embodiment of the present application, a first focusing unit is arranged in the edge area of ​​the color conversion layer, which can focus the light with a wide viewing angle projected by the light-emitting device to the color conversion layer, improve the utilization rate of the light with a wide viewing angle, and reduce the power consumption of the display panel; at the same time, the first focusing unit can also optimize the propagation path of the light emitted from the color conversion layer, reduce the crosstalk between the light emitted from the color conversion layer, reduce the risk of color deviation of the display panel, and improve the display hue of the display panel.

[0085] In one embodiment, referring to Figure 1 In the structural schematic diagram of the display panel shown in the figure, in the direction parallel to the substrate 100, the ratio of the width W1 of the edge region 320 to the width W2 of the central region 310 is 1:(8-12), for example, it can be 1:8, 1:9, 1:10, 1:11 or 1:12, etc. The ratio of the width of the edge region to the width of the central region is within the above range, which can fully utilize the wide viewing angle light without affecting the display effect of the display panel. It should be noted that the edge region 320 surrounds the central region 310, and the width of the edge region 320 can refer to Figure 1 In the width range shown by W1, the ratio of the width W1 of the edge region 320 to the width W2 of the central region 310 refers to the ratio of W1 to W2. In a preferred embodiment, in the direction parallel to the substrate 100, the ratio of the width W1 of the edge region 320 to the width W2 of the central region 310 is 1:(9-11). In a more preferred embodiment, in the direction parallel to the substrate 100, the ratio of the width W1 of the edge region 320 to the width W2 of the central region 310 is 1:10.

[0086] In one embodiment, referring to Figure 1 The structural diagram of the display panel shown in FIG. Figure 2 In the partial top view of the color conversion layer shown in FIG. 1 , the first light focusing unit 330 includes a plurality of first light focusing sub-units 331, and the first light focusing sub-units 331 surround at least a portion of the central region 310. Thus, the wide viewing angle light can be refracted at the first light focusing sub-units 331, thereby focusing the wide viewing angle light and improving the utilization rate of the wide viewing angle light.

[0087] In one embodiment, among the adjacent first photoconcentrating sub-units 331, the first photoconcentrating sub-units 331 away from the central region 310 surround the first photoconcentrating sub-units 331 close to the central region 310. The light concentrating effect of the plurality of first photoconcentrating sub-units 331 is better.

[0088] In one embodiment, referring to Figure 1 In the structural diagram of the display panel shown in FIG. 1 , the first photon focusing subunit 331 includes a second surface 3312, and the second surface 3312 is an arc surface with an opening toward the central area 310. Therefore, when the second surface 3312 is an arc surface, the light focusing effect is better.

[0089] In one embodiment, referring to Figure 1 In the structural diagram of the display panel shown in FIG. 1 , the cutting angle α of the second surface 3312 at the end point close to the substrate 100 is 55-65°, for example, 55°, 60° or 65°, etc., preferably 60°. The bending angle of the second surface 3312 is suitable, which is more conducive to gathering light with a large viewing angle and further reducing power consumption.

[0090] It should be noted that the cutting angle α of the second surface 3312 at the end point close to the substrate 100 refers to the angle between the cut surface of the second surface 3312 at the end point close to the substrate 100 and the plane parallel to the substrate.

[0091] In one embodiment, referring to Figure 1 In the structural diagram of the display panel shown in the figure, the first photon focusing unit 331 also includes a first surface 3311, the first surface 3311 and the second surface 3312 intersect each other; the second surface 3312 is located on the side of the first surface 3311 away from the central area 210, and the first surface 3311 is an arc surface with an opening toward the central area 310. The first surface 3311 can also achieve a good effect of focusing light with a large viewing angle; at the same time, the structure of the first surface 3311 is conducive to reducing the spacing between adjacent first photon focusing units 331, thereby improving the focusing effect of the first focusing unit 330.

[0092] In one embodiment, in two adjacent first photon concentrating subunits 331, the second surface 3312 of the first photon concentrating subunit 331 close to the central region 310 intersects with the first surface 3311 of the first photon concentrating subunit 331 far from the central region 310. Thus, the two adjacent first photon concentrating subunits 331 are more compact and have a better light concentrating effect.

[0093] In one embodiment, referring to Figure 1 In the structural diagram of the display panel shown, the surface of the color conversion layer 300 in the central area 310 away from the substrate 100 is parallel to the plane where the substrate 100 is located. Light passing through the central area 310 of the color conversion layer 300 can be emitted normally without affecting the display effect of the display panel.

[0094] In one embodiment, referring to Figure 1 The structural schematic diagram of the display panel shown in the figure, the color conversion layer 300 includes a first color conversion unit 301, a second color conversion unit 302 and a transmission unit 303, and at least one of the first color conversion unit 301, the second color conversion unit 302 and the transmission unit 303 includes a central area 310 and an edge area 320. For example, the light emitted by the light-emitting device can be blue, the first color conversion unit 301 can convert the blue light into red light, the second color conversion unit 302 can convert the blue light into green light, and the transmission unit 303 is transparent and directly transmits the blue light, thereby facilitating the preparation of a large-area display panel, and the display effect of the display panel is excellent, and the wide viewing angle light can be fully utilized to reduce the power consumption of the display panel. For example, in this embodiment, the first color conversion unit is provided with a quantum dot (QD) that converts the blue light into red light, and the second color conversion unit is provided with a quantum dot that converts the blue light into green light; the transmission unit is not provided with a quantum dot, and is transparent, and directly transmits the blue light.

[0095] In another embodiment, referring to Figure 3 In the structural schematic diagram of the display panel shown, the color conversion layer 300 includes a first color conversion unit 301, a second color conversion unit 302, a third color conversion unit 304 and a transmission unit 303, and at least one of the first color conversion unit 301, the second color conversion unit 302, the third color conversion unit 304 and the transmission unit 303 includes a central area 310 and an edge area 320. Exemplarily, the light emitted by the light emitting device can be white, the first color conversion unit 301 can convert the white light into red light, the second color conversion unit 302 can convert the white light into green light, the third color conversion unit 304 can convert the white light into blue light, and the transmission unit 303 transmits white light, thereby facilitating the preparation of a large-area display panel, and the display effect of the display panel is excellent, and the wide viewing angle light can be fully utilized to reduce the power consumption of the display panel. Illustratively, in the present embodiment, the first color conversion unit is provided with quantum dots for converting white light into red light, the second color conversion unit is provided with quantum dots for converting white light into green light, and the third color conversion unit is provided with quantum dots for converting white light into blue light. The transmission unit is not provided with quantum dots and is transparent, directly transmitting white light.

[0096] In one embodiment, referring to Figure 4The structural schematic diagram of the display panel shown in the figure, the display panel also includes an isolation structure 400, the isolation structure 400 is located on the side of the light-emitting device 200 away from the substrate 100, the isolation structure 400 has a plurality of openings 410, and the color conversion layer 300 is located in the opening 410. The isolation structure 400 can effectively avoid color crosstalk between adjacent color conversion units or between adjacent color conversion units and transmission units, and reduce the risk of color deviation of the display panel. Exemplarily, the isolation structure 400 can be a retaining wall, a pixel defining layer, or an isolation column.

[0097] In one embodiment, referring to Figure 5 The structural schematic diagram of the display panel shown in the figure, the display panel further includes: a color filter layer 500, which is located on the side of the color conversion layer 300 away from the substrate 100, and the color filter layer 500 includes a plurality of color filter units 510, and the orthographic projection of the color filter unit 510 on the substrate 100 covers the orthographic projection of the color conversion layer 300 on the substrate 100; the color filter unit 510 includes a second light focusing unit 511. The arrangement of the second light focusing unit 511 in the color filter layer 500 can also improve the emissivity of light with a large viewing angle.

[0098] In one embodiment, referring to Figure 5 The structural diagram of the display panel shown in FIG. Figure 6 The schematic diagram of the partial top view structure of the color film unit shown in the figure, the second focusing unit 511 includes a second focusing unit including multiple second focusing sub-units 5111, and among the adjacent second focusing sub-units 5111, the second focusing sub-unit 5111 away from the centroid of the color film unit 510 surrounds the second focusing sub-unit 5111 close to the centroid of the color film unit 510.

[0099] Exemplarily, the centroid of the color filter unit 510 refers to the geometric center of the cross-sectional shape of the color filter unit 510 .

[0100] In one embodiment, referring to Figure 5 In the structural diagram of the display panel shown in FIG. 1 , the second photon focusing subunit 5111 includes a third surface 51111, and the third surface 51111 is an arc surface with an opening toward the centroid. Therefore, when the third surface 51111 is an arc surface, the light focusing effect is better.

[0101] In one embodiment, the cutting angle β of the third surface 51111 at the end point close to the substrate 100 is 55-65°, for example, 55°, 60° or 65°, etc., preferably 60°. The bending angle of the third surface 51111 is suitable, which is more conducive to gathering light with a large viewing angle and further reducing power consumption.

[0102] It should be noted that the cutting angle β of the third surface 51111 at the end point close to the substrate 100 refers to the angle between the cut surface of the third surface 51111 at the end point close to the substrate 100 and the plane parallel to the substrate 100 .

[0103] In one embodiment, the second photon focusing sub-unit 5111 further includes a fourth surface 51112, the third surface 51111 is located on the side of the fourth surface 51112 away from the centroid of the color filter unit 510, the third surface 51111 and the fourth surface 51112 intersect, and the fourth surface 51112 is an arc surface with an opening toward the centroid. The fourth surface 51112 can also achieve a good effect of focusing light with a large viewing angle.

[0104] In one embodiment, among two adjacent second photon-concentrating units 5111 , the third surface 51111 of the second photon-concentrating unit 5111 close to the centroid of the color filter unit intersects with the fourth surface 51112 of the second photon-concentrating unit 5111 far from the centroid of the color filter unit.

[0105] In one embodiment, referring to Figure 5 As shown in the structural schematic diagram of the display panel, the color film unit 510 further includes a protruding structure 512 , and the second photon focusing unit 5111 surrounds the protruding structure 512 .

[0106] In one embodiment, the second photon focusing unit 5111 is symmetrical about the central axis of the color filter unit 510, and the protruding structure 512 is symmetrical about the central axis of the color filter unit 510. This facilitates manufacturing, and the light emitted by the color filter unit is more uniform, and the display effect of the display panel is better.

[0107] It is understandable that, referring to Figure 7 The structural diagram of the display panel shown in the figure, the display panel also includes a cover plate 600, the cover plate 600 is located on the surface of the color filter layer 500 away from the substrate 100, and the wide viewing angle light in the color filter layer 500 is gathered by the second focusing unit 511 to avoid the wide viewing angle light from being totally reflected at the contact point between the cover plate 600 and the color filter layer 500, thereby improving the utilization rate of the wide viewing angle light. For example, referring to Figure 7 , the cover plate 600 fills the gaps between adjacent second photon focusing sub-units 5111. Figure 7 , the cover plate 600 fills the gap between the second photoconcentrator unit 5111 and the protruding structure 512. Optionally, the cover plate 600 completely covers the color filter unit 510, and fills the gap between adjacent second photoconcentrator units 5111, and fills the gap between the second photoconcentrator unit 5111 and the protruding structure 512.

[0108] In one embodiment, the refractive index of the cover plate is smaller than the refractive index of the color filter unit.

[0109] For example, refer to Figure 7The light path diagram of the light passing through the color conversion layer 300 is shown in S1, and it can be seen that the first focusing unit 330 of the edge area 320 has an excellent focusing effect; the light path diagram of the light passing through the color filter layer 500 is shown in S2, and it can be seen that the second focusing unit 511 of the color filter layer 500 has an excellent focusing effect.

[0110] In one embodiment, referring to Figure 5 The structural diagram of the display panel shown in FIG. 1 further includes a cover layer 700, which is located on the side of the color conversion layer 300 away from the substrate 100, and the refractive index of the cover layer 700 is less than the refractive index of the color conversion layer 300. In a specific embodiment, the cover layer 700 is located between the color conversion layer 300 and the color filter layer 500. Thus, the cover layer can further focus light, prevent the light emitted from the first color conversion unit from being absorbed by the adjacent second color conversion unit or the color filter unit corresponding to the transmission unit, reduce color crosstalk, and reduce the risk of color deviation of the display panel.

[0111] In one embodiment, the first light focusing unit 330 includes a plurality of first light focusing sub-units 331 , and the first light focusing sub-units 331 surround at least a portion of the central region 310 . The covering layer 700 covers the color conversion layer 300 and fills the gaps between adjacent first light focusing sub-units 331 .

[0112] In one embodiment, the difference in refractive index between the color conversion layer and the cover layer is 0.2-0.4, for example, 0.2, 0.3 or 0.4, etc. The difference in refractive index between the cover layer and the color conversion layer is appropriate, and the focusing effect is better.

[0113] In one embodiment, the material of the cover layer includes silicon nitride. Exemplarily, the refractive index of the color conversion layer is greater than or equal to 1.7, and the refractive index of silicon nitride is 1.45.

[0114] In a specific embodiment, referring to Figure 7 As shown in the structural schematic diagram of the display panel, the display panel further includes a black matrix 800, which is located on the surface of the cover layer 700 away from the substrate 100, and a plurality of through holes are provided in the black matrix 800, and the color filter layer 500 is located in the through holes.

[0115] In a specific embodiment, referring to Figure 8 As shown in the structural diagram of the display panel, the display panel further includes an encapsulation layer 900 and a touch layer 1000. The encapsulation layer 900 is located on the surface of the light-emitting device 200 close to the color conversion layer 300, and the touch layer 1000 is located on the surface of the encapsulation layer 900 away from the substrate 100.

[0116] A second aspect of the present application provides a display panel, referring to Figure 5The structural schematic diagram of the display panel shown in the figure comprises: a substrate 100; a light emitting device 200, located at one side of the substrate 100; a color conversion layer 300, located at a side of the light emitting device 200 away from the substrate 100, the orthographic projection of the color conversion layer 300 on the substrate 100 at least partially overlaps with the orthographic projection of the light emitting device 200 on the substrate 100; a color filter layer 500, located at a side of the color conversion layer 300 away from the substrate 100, the color filter layer 500 comprises a plurality of color filter units 510, the orthographic projection of the color filter unit 510 on the substrate 100 covers the orthographic projection of the color conversion layer 300 on the substrate 100; and the color filter unit 510 comprises a second light focusing unit 511. The provision of the second light focusing unit 511 in the color filter layer 500 can also improve the emissivity of light with a large viewing angle.

[0117] It should be noted that the substrate, the light-emitting device, the color conversion layer, and the color filter layer are consistent with the previous description and will not be described in detail here.

[0118] It should be noted that the display panel of this embodiment can be combined with the display panel described above in whole or in part, which will not be described in detail here.

[0119] In one embodiment, referring to Figure 5 The structural diagram of the display panel shown in FIG. Figure 6 The schematic diagram of the partial top view structure of the color film unit shown in the figure, the second focusing unit 511 includes a second focusing unit including multiple second focusing sub-units 5111, and among the adjacent second focusing sub-units 5111, the second focusing sub-unit 5111 away from the centroid of the color film unit 510 surrounds the second focusing sub-unit 5111 close to the centroid of the color film unit 510.

[0120] In one embodiment, referring to Figure 5 In the structural diagram of the display panel shown in FIG. 1 , the second photon focusing subunit 5111 includes a third surface 51111, and the third surface 51111 is an arc surface with an opening toward the centroid. Therefore, when the third surface 51111 is an arc surface, the light focusing effect is better.

[0121] In one embodiment, the cutting angle β of the third surface 51111 at the end point close to the substrate 100 is 55-65°, for example, 55°, 60° or 65°, etc., preferably 60°. The bending angle of the third surface 51111 is suitable, which is more conducive to gathering light with a large viewing angle and further reducing power consumption.

[0122] It should be noted that the cutting angle β of the third surface 51111 at the end point close to the substrate 100 refers to the angle between the cut surface of the third surface 51111 at the end point close to the substrate 100 and the plane parallel to the substrate 100 .

[0123] In one embodiment, the second photon focusing sub-unit 5111 further includes a fourth surface 51112, the third surface 51111 is located on the side of the fourth surface 51112 away from the centroid of the color filter unit 510, the third surface 51111 and the fourth surface 51112 intersect, and the fourth surface 51112 is an arc surface with an opening toward the centroid. The fourth surface 51112 can also achieve a good effect of focusing light with a large viewing angle.

[0124] In one embodiment, among two adjacent second photon-concentrating units 5111 , the third surface 51111 of the second photon-concentrating unit 5111 close to the centroid of the color filter unit intersects with the fourth surface 51112 of the second photon-concentrating unit 5111 far from the centroid of the color filter unit.

[0125] In one embodiment, referring to Figure 5 As shown in the structural schematic diagram of the display panel, the color film unit 510 further includes a protruding structure 512 , and the second photon focusing unit 5111 surrounds the protruding structure 512 .

[0126] In one embodiment, the second photon focusing unit 5111 is symmetrical about the central axis of the color filter unit 510, and the protruding structure 512 is symmetrical about the central axis of the color filter unit 510. This facilitates manufacturing, and the light emitted by the color filter unit is more uniform, and the display effect of the display panel is better.

[0127] It is understandable that, referring to Figure 7 The structural schematic diagram of the display panel shown in the figure, the display panel also includes a cover plate 600, the cover plate 600 is located on the surface of the color filter layer 500 away from the substrate 100, and the wide viewing angle light in the color filter layer 500 is gathered by the second focusing unit 511 to avoid the wide viewing angle light from being totally reflected at the contact point between the cover plate 600 and the color filter layer 500, thereby improving the utilization rate of the wide viewing angle light. Optionally, the refractive index of the cover plate is less than the refractive index of the color filter unit.

[0128] For example, in the above display panel, the substrate may be an array substrate, and the light-emitting device includes a first electrode layer, a first transmission layer, a light-emitting layer, a second transmission layer, and a second electrode layer stacked in sequence; the first electrode layer is located on the surface of the substrate, and the light-emitting layer may emit blue light or white light. The light-emitting device may be a whole surface, which is conducive to the manufacture of a large-size display panel and reduces the difficulty of manufacturing the display panel.

[0129] Exemplarily, the first electrode layer can be a cathode, in which case the first transport layer is an electron transport layer, the second transport layer is a hole transport layer, and the second electrode layer is an anode; the first electrode layer can also be an anode, in which case the first transport layer is a hole transport layer, the second transport layer is an electron transport layer, and the second electrode layer is a cathode.

[0130] It is understandable that the display panel may also include structures that a conventional display panel should have, such as a driver chip, a bonding structure, etc., which will not be elaborated herein.

[0131] A third aspect of the present application provides a method for preparing a display panel, referring to Fig. 9 The preparation method shown is a schematic flow chart, and the preparation method comprises the following steps.

[0132] S100: preparing a light-emitting device on one side of the substrate.

[0133] It should be noted that the light emitting device is consistent with the above description and will not be described in detail here.

[0134] S200: preparing a color conversion layer on a side of the light-emitting device away from the substrate.

[0135] The orthographic projection of the color conversion layer on the substrate at least partially overlaps with the orthographic projection of the light-emitting device on the substrate, the color conversion layer includes a central area and an edge area surrounding the central area, and the color conversion layer includes a first focusing unit located in the edge area.

[0136] It should be noted that the color conversion layer and the first focusing unit are consistent with the above description and will not be described in detail here.

[0137] In one embodiment, preparing a color conversion layer on a side of the light emitting device away from the substrate includes: preparing a color conversion material layer on a side of the light emitting device away from the substrate; arranging a first mask plate on a surface of the color conversion material layer away from the substrate; and performing a patterning process on the color conversion material layer based on the first mask plate to obtain the color conversion layer. Thus, the preparation method is simple, convenient, and easy to implement.

[0138] Exemplarily, patterning the color conversion material layer based on the first mask includes exposing the color conversion material layer provided with the first mask, removing the first mask, and developing the exposed color conversion material layer.

[0139] In one embodiment, the first focusing unit includes at least one first sawtooth structure, and before the first mask is set on the surface of the color conversion material layer away from the substrate, it also includes: obtaining a first mask with a specific transmittance, the first mask including a central area and an edge area surrounding the central area, so that the transmittance of the edge area of ​​the first mask corresponds to the shape of the edge area of ​​the color conversion layer, and the transmittance of the central area of ​​the first mask corresponds to the shape of the central area of ​​the color conversion layer. In a specific embodiment, refer to Fig.10The schematic diagram of the transmittance of a cross section of the first mask in different regions is shown. In the central region of the first mask, the transmittance of the first mask is uniform; in the edge region of the first mask, the transmittance of the first mask corresponds to the first sawtooth structure. Exemplarily, the transmittance of the first mask is processed using a halftone process. The higher the transmittance of the first mask, the lower the removal rate of the color conversion material layer when the color conversion material layer is patterned, such as during development.

[0140] In one embodiment, referring to Fig.11 As shown in the schematic flow chart of the preparation method, the preparation method of the display panel also includes the following steps.

[0141] S300: preparing a color filter layer on a side of the color conversion layer away from the substrate.

[0142] The color filter layer includes a plurality of color filter units, and a second light focusing unit is arranged on a surface of the color filter unit away from the substrate.

[0143] It should be noted that the color filter unit and the second focusing unit are consistent with the above description and will not be described in detail here.

[0144] In one embodiment, preparing a color filter layer on a side of the color conversion layer away from the substrate includes: preparing a color filter unit material layer on a side of the color conversion layer away from the substrate; arranging a second mask plate on a surface of the color filter unit material layer away from the substrate; and performing a patterning process on the color filter unit material layer based on the second mask plate to obtain a color filter unit. Thus, the preparation method is simple, convenient, and easy to implement.

[0145] Exemplarily, patterning the color filter unit material layer based on the second mask plate includes exposing the color filter unit material layer provided with the second mask plate, removing the second mask plate, and then developing the exposed color filter unit material layer.

[0146] In one embodiment, the second focusing unit includes at least one second sawtooth structure, and before the second mask is arranged on the surface of the color filter unit material layer away from the substrate, it also includes: obtaining a second mask with a specific transmittance, so that the transmittance of the second mask corresponds to the shape of the color filter unit. In a specific embodiment, refer to Fig.12 A schematic diagram of transmittance of a cross section of the second mask in different regions is shown, and the transmittance of the second mask corresponds to the second sawtooth structure. Exemplarily, the transmittance of the second mask is processed using a halftone process, and the higher the transmittance of the second mask, the lower the removal rate of the color filter unit material layer when the color filter unit material layer is patterned, such as during development.

[0147] Illustratively, the materials of the first mask plate and the second mask plate include but are not limited to chromium.

[0148] The basic principles of the present application are described above in conjunction with specific embodiments. However, it should be noted that the advantages, strengths, effects, etc. mentioned in the present application are only examples and not limitations, and it cannot be considered that these advantages, strengths, effects, etc. are required by each embodiment of the present application. In addition, the specific details disclosed above are only for the purpose of illustration and ease of understanding, not for limitation, and the above details do not limit the present application to being implemented by adopting the above specific details.

[0149] The above description has been given for the purpose of illustration and description. In addition, this description is not intended to limit the embodiments of the present application to the forms disclosed herein. Although multiple example aspects and embodiments have been discussed above, those skilled in the art will recognize certain variations, modifications, changes, additions and sub-combinations thereof.

Claims

1. A display panel, characterized in that: include: substrate; A light emitting device, located on one side of the substrate; A color conversion layer is located on a side of the light-emitting device away from the substrate, the orthographic projection of the color conversion layer on the substrate at least partially overlaps with the orthographic projection of the light-emitting device on the substrate, the color conversion layer includes a central area and an edge area surrounding the central area, and the color conversion layer includes a first focusing unit located in the edge area.

2. The display panel according to claim 1, characterized in that: The first light focusing unit includes a plurality of first light focusing sub-units, and the first light focusing sub-units surround at least a portion of the central area; Preferably, among the adjacent first photon-concentrating sub-units, the first photon-concentrating sub-units far from the central area surround the first photon-concentrating sub-units close to the central area; Preferably, the first photon focusing unit comprises a second surface, and the second surface is an arc surface with an opening toward the central area; Preferably, the cutting angle of the second surface at the end point close to the substrate is 55-65°, preferably 60°; Preferably, the first photon focusing unit further comprises a first surface, the first surface and the second surface intersect each other; the second surface is located on a side of the first surface away from the central area; Preferably, the first surface is an arc surface with an opening toward the central area; Preferably, in two adjacent first photon-concentrating sub-units, the second surface of the first photon-concentrating sub-unit close to the central region intersects with the first surface of the first photon-concentrating sub-unit far from the central region; Preferably, a surface of the color conversion layer in the central region away from the substrate is parallel to the plane where the substrate is located; Preferably, in a direction parallel to the substrate, a ratio of a width of the edge region to a width of the central region is 1:(8-12); Preferably, in a direction parallel to the substrate, a ratio of a width of the edge region to a width of the central region is 1:(9-11).

3. The display panel according to claim 1, characterized in that: The color conversion layer includes a first color conversion unit, a second color conversion unit, and a transmission unit, at least one of the first color conversion unit, the second color conversion unit, and the transmission unit includes the central area and the edge area, or, The color conversion layer includes a first color conversion unit, a second color conversion unit, a third color conversion unit and a transmission unit, at least one of the first color conversion unit, the second color conversion unit, the third color conversion unit and the transmission unit includes the central area and the edge area; Preferably, the display panel further comprises an isolation structure, wherein the isolation structure is located on a side of the light emitting device away from the substrate, the isolation structure has a plurality of openings, and the color conversion layer is located in the openings.

4. The display panel according to claim 1, characterized in that: Also includes: A color filter layer is located on a side of the color conversion layer away from the substrate, the color filter layer comprises a plurality of color filter units, and the orthographic projection of the color filter unit on the substrate covers the orthographic projection of the color conversion layer on the substrate; The color film unit includes a second light focusing unit; Preferably, the second light focusing unit comprises a plurality of second photon focusing units, and among adjacent second photon focusing units, the second photon focusing units far from the centroid of the color filter unit surround the second photon focusing units close to the centroid of the color filter unit; Preferably, the second photon focusing unit comprises a third surface, and the third surface is an arc surface with an opening facing the centroid; Preferably, the cutting angle of the third surface at the end point close to the substrate is 55-65°, preferably 60°; Preferably, the second photon focusing unit further includes a fourth surface, the third surface is located on a side of the fourth surface away from the centroid of the color filter unit, and the third surface intersects with the fourth surface; Preferably, the fourth surface is an arc surface with an opening toward the centroid; Preferably, in two adjacent second photon-concentrating units, the third surface of the second photon-concentrating unit close to the centroid of the color filter unit intersects with the fourth surface of the second photon-concentrating unit far from the centroid of the color filter unit; Preferably, the color film unit further comprises a protruding structure, and the second photon focusing unit surrounds the protruding structure; Preferably, the second photon focusing unit is symmetrical about the central axis of the color filter unit, and the protruding structure is symmetrical about the central axis of the color filter unit; Preferably, the display panel further comprises a cover plate, which is located on a side of the color film unit away from the substrate; Preferably, the cover plate fills the gap between adjacent second photon-concentrating sub-units, and / or the cover plate fills the gap between the second photon-concentrating sub-unit and the protrusion; Preferably, the refractive index of the cover plate is smaller than the refractive index of the color film unit.

5. The display panel according to claim 1, characterized in that: It also includes a covering layer, which is located on a side of the color conversion layer away from the substrate, and the refractive index of the covering layer is smaller than the refractive index of the color conversion layer; Preferably, the first light-concentrating unit comprises a plurality of first light-concentrating sub-units, and the first light-concentrating sub-units surround at least a portion of the central area; the covering layer fills the gaps between adjacent first light-concentrating sub-units; Preferably, the difference in refractive index between the color conversion layer and the cover layer is 0.2 to 0.4; Preferably, the material of the cover layer includes silicon nitride.

6. A display panel, characterized in that: include: substrate; A light emitting device, located on one side of the substrate; a color conversion layer, located on a side of the light-emitting device away from the substrate, wherein an orthographic projection of the color conversion layer on the substrate at least partially overlaps with an orthographic projection of the light-emitting device on the substrate; A color filter layer is located on a side of the color conversion layer away from the substrate, the color filter layer comprises a plurality of color filter units, and the orthographic projection of the color filter unit on the substrate covers the orthographic projection of the color conversion layer on the substrate; The color film unit includes a second light focusing unit.

7. The display panel according to claim 6, characterized in that: The second light focusing unit comprises a plurality of second photon focusing units, and among the adjacent second photon focusing units, the second photon focusing units far from the centroid of the color filter unit surround the second photon focusing units close to the centroid of the color filter unit; Preferably, the second photon focusing unit comprises a third surface, and the third surface is an arc surface with an opening facing the centroid; Preferably, the cutting angle of the third surface at the end point close to the substrate is 55-65°, preferably 60°; Preferably, the second photon focusing unit further includes a fourth surface, the third surface is located on a side of the fourth surface away from the centroid of the color filter unit, and the third surface intersects with the fourth surface; Preferably, the fourth surface is an arc surface with an opening toward the centroid; Preferably, in two adjacent second photon-concentrating units, the third surface of the second photon-concentrating unit close to the centroid of the color filter unit intersects with the fourth surface of the second photon-concentrating unit far from the centroid of the color filter unit; Preferably, the color film unit further comprises a protruding structure, and the second photon focusing unit surrounds the protruding structure; Preferably, the second photon focusing unit is symmetrical about the central axis of the color filter unit, and the protruding structure is symmetrical about the central axis of the color filter unit; Preferably, the display panel further comprises a cover plate, which is located on a side of the color film unit away from the substrate; Preferably, the refractive index of the cover plate is smaller than the refractive index of the color film unit.

8. A method for preparing a display panel, characterized in that: include: preparing a light emitting device on one side of the substrate; A color conversion layer is prepared on a side of the light-emitting device away from the substrate, the orthographic projection of the color conversion layer on the substrate at least partially overlaps with the orthographic projection of the light-emitting device on the substrate, the color conversion layer includes a central area and an edge area surrounding the central area, and the color conversion layer includes a first focusing unit located in the edge area.

9. The preparation method according to claim 8, characterized in that: Preparing a color conversion layer on a side of the light-emitting device away from the substrate comprises: Prepare a color conversion material layer on a side of the light emitting device away from the substrate; Disposing a first mask on a surface of the color conversion material layer away from the substrate; Based on the first mask plate, the color conversion material layer is patterned to obtain the color conversion layer.

10. The preparation method according to claim 8, characterized in that: Also includes: A color filter layer is prepared on a side of the color conversion layer away from the substrate, wherein the color filter layer includes a plurality of color filter units, and a second light focusing unit is arranged on a surface of the color filter unit away from the substrate; Preferably, preparing a color filter layer on a side of the color conversion layer away from the substrate comprises: Prepare a color film unit material layer on a side of the color conversion layer away from the substrate; Disposing a second mask plate on the surface of the color filter unit material layer away from the substrate; Based on the second mask plate, the color filter unit material layer is patterned to obtain the color filter unit.

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