Organic light emitting display panel

Abstract

The invention discloses an organic light-emitting display panel, which is characterized in that a micro lens part comprises a first lens part and a second lens part, the second lens part surrounds the first lens part, and in a top view of the organic light-emitting display panel, the first lens part is overlapped with a light-emitting unit; according to the organic light-emitting display panel, the second lens part is arranged, the micro lens part is arranged, the flat layer covers the micro lens part, and the refractive index of the flat layer is smaller than that of the micro lens part, so that the side wall of the second lens part can converge large-angle light of the light-emitting unit, and the light-emitting efficiency of the organic light-emitting display panel at a positive viewing angle or a small viewing angle is improved; and the display effect of the organic light-emitting display panel is improved.

Description

Technical Field

[0001] The present application relates to the field of display technology, and in particular to an organic light-emitting display panel. Background Art

[0002] Organic light emitting diode (OLED) is widely used in various display devices due to its excellent color performance and high contrast. However, the light emitted by the light emitting unit of the organic light emitting display panel has a certain divergence angle when working, so that the light is diverged in all directions, resulting in reduced light extraction efficiency of the organic light emitting display panel at normal viewing angle or small viewing angle. Summary of the invention

[0003] The embodiments of the present application provide an organic light emitting display panel to improve the problem of reduced light extraction efficiency of the organic light emitting display panel at a normal viewing angle or a small viewing angle.

[0004] In a first aspect, an embodiment of the present application provides an organic light emitting display panel, comprising:

[0005] substrate;

[0006] A light-emitting layer, the light-emitting layer is disposed on the substrate, and the light-emitting layer includes a plurality of light-emitting units;

[0007] A microlens portion, the microlens portion is disposed on a side of the light-emitting layer away from the substrate, the microlens portion includes a first lens portion and a second lens portion, the second lens portion surrounds the first lens portion, and in a top view of the organic light-emitting display panel, the first lens portion overlaps with the light-emitting unit;

[0008] A flat layer covers the microlens portion, and a refractive index of the flat layer is smaller than a refractive index of the microlens portion.

[0009] Furthermore, the first lens portion includes a first top surface, and in a top view of the organic light emitting display panel, the first top surface overlaps with at least a portion of the light emitting unit.

[0010] Furthermore, the second lens portion includes a second bottom surface, a third side surface, a second top surface and a fourth side surface, the second bottom surface, the third side surface, the second top surface and the fourth side surface are connected in sequence, the distance from the third side surface to the first lens portion is smaller than the distance from the fourth side surface to the first lens portion, and the angle formed by the third side surface and the second bottom surface is smaller than the angle formed by the fourth side surface and the second bottom surface.

[0011] Furthermore, the width of the second top surface is 0.1um-2um.

[0012] Furthermore, a groove is provided on the second lens portion, and a side wall of the groove on a side close to the first lens portion is inclined relative to a normal line of the substrate.

[0013] Furthermore, the size of the opening of the groove at a side away from the substrate is larger than the size of the opening of the groove at a side close to the substrate.

[0014] Furthermore, the width of the opening of the groove on the side away from the substrate is 0.1um-2um.

[0015] Furthermore, the ratio of the depth of the groove to the thickness of the second lens portion is no more than 4 / 5.

[0016] Furthermore, the shape of the groove includes at least one of a trapezoidal shape, a hemispherical shape, an ellipsoidal shape or a conical shape.

[0017] Furthermore, a distance between the first lens portion and the second lens portion is 1 um-7 um.

[0018] Beneficial effects of this application:

[0019] The present application provides an organic light-emitting display panel, wherein the microlens portion includes a first lens portion and a second lens portion, the second lens portion surrounds the first lens portion, and in a top view of the organic light-emitting display panel, the first lens portion overlaps with the light-emitting unit, and the flat layer is provided to cover the microlens portion, and the refractive index of the flat layer is smaller than the refractive index of the microlens portion, so that the side wall of the second lens portion can converge the large-angle light of the light-emitting unit, thereby enhancing the light extraction efficiency of the organic light-emitting display panel at a normal viewing angle or a small viewing angle, and improving the display effect of the organic light-emitting display panel. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 is a schematic diagram of an organic light emitting display panel according to a first embodiment of the present application;

[0021] Figure 2 yes Figure 1 A schematic diagram of a microlens portion of an organic light emitting display panel shown;

[0022] Figure 3 yes Figure 2 A cross-sectional view of the microlens portion at AA′ shown;

[0023] Figure 4 is a principle diagram of light paths when two taper angles of the second lens portion of the organic light emitting display panel of the first embodiment of the present application are equal;

[0024] Figure 5is a principle diagram of an optical path when the angle formed between the third side surface and the second bottom surface of the second lens portion of the organic light emitting display panel of the first embodiment of the present application is smaller than the angle formed between the fourth side surface and the second bottom surface;

[0025] Figure 6 is a schematic diagram of the ratio of the light efficiency improvement rate of the organic light emitting display panel of Example 1 of the present application when the light output angle is 0°;

[0026] Figure 7 is a schematic diagram of the light output efficiency of the organic light emitting display panel of Example 1 of the present application when the light output angle is 30°;

[0027] Figure 8 is a schematic diagram of an organic light emitting display panel according to a second embodiment of the present application;

[0028] Fig. 9 yes Figure 8 A schematic diagram of a microlens portion of an organic light emitting display panel shown;

[0029] Fig.10 yes Fig. 9 A cross-sectional view of the microlens portion at BB′ shown;

[0030] Fig.11 is a schematic diagram of the positional relationship between the first lens portion and the light-emitting unit of the organic light-emitting display panel of the second embodiment of the present application;

[0031] Fig.12 is a light path principle diagram of an organic light emitting display panel in a second embodiment of the present application;

[0032] Fig.13 is a schematic diagram of the ratio of the light efficiency improvement rate of the organic light emitting display panel of Example 2 of the present application when the light output angle is 0°;

[0033] Fig.14 is a schematic diagram of the light output efficiency of the organic light emitting display panel of Example 2 of the present application when the light output angle is 30°;

[0034] Fig.15 is a schematic diagram of an organic light emitting display panel according to a third embodiment of the present application;

[0035] Fig.16 yes Fig.15 A schematic diagram of a microlens portion of an organic light emitting display panel shown;

[0036] Fig.17 yes Fig.16 A cross-sectional view of the microlens portion at CC′ shown;

[0037] Fig.18is a schematic diagram of the positional relationship between the first lens portion and the light-emitting unit of the organic light-emitting display panel of the third embodiment of the present application;

[0038] Fig.19 is a schematic diagram of the light efficiency improvement rate of the organic light emitting display panel of Example 3 of the present application when the light output angle is 0°;

[0039] Fig. 20 It is a schematic diagram of the light output efficiency of the organic light emitting display panel of Example 3 of the present application when the light output angle is 30°.

[0040] 100-substrate; 200-light-emitting layer, 210-light-emitting unit; 300-microlens portion, 310-first lens portion, 311-first top surface, 312-first bottom surface, 313-first side surface, 314-second side surface, 320-second lens portion, 321-second bottom surface, 322-third side surface, 323-second top surface, 324-fourth side surface, 325-groove; 400-flat layer; 500-encapsulation layer, 510-first inorganic layer, 520-first organic layer, 530-second inorganic layer. DETAILED DESCRIPTION

[0041] The technical solutions in the embodiments of the present application will be described below in conjunction with the drawings in the embodiments of the present application. The technical solutions described below are only used to explain and illustrate the ideas of the present application and should not be regarded as limiting the scope of protection of the present application.

[0042] In addition, the terms "first", "second" and similar words do not indicate any order, quantity or importance, but are only used to distinguish different technical features. The term "plurality" and similar words mean two or more, unless otherwise clearly defined.

[0043] The first embodiment of the present application provides an organic light emitting display panel, referring to Figure 1-Figure 5 The organic light emitting display panel includes a substrate 100 , a light emitting layer 200 , a micro lens portion 300 and a planar layer 400 .

[0044] Specifically, the light-emitting layer 200 is disposed on the substrate 100, and the light-emitting layer 200 includes a plurality of light-emitting units 210; the microlens portion 300 is disposed on a side of the light-emitting layer 200 away from the substrate 100, and the microlens portion 300 includes a first lens portion 310 and a second lens portion 320, and the second lens portion 320 surrounds the first lens portion 310, and in a top view of the organic light-emitting display panel, the first lens portion 310 overlaps with the light-emitting unit 210; the flat layer 400 covers the microlens portion 300, and the refractive index of the flat layer 400 is less than the refractive index of the microlens portion 300.

[0045] The microlens portion 300 includes a first lens portion 310 and a second lens portion 320, and the second lens portion 320 surrounds the first lens portion 310. In a top view of the organic light-emitting display panel, the first lens portion 310 overlaps with the light-emitting unit 210, and a flat layer 400 is provided to cover the microlens portion 300, and the refractive index of the flat layer 400 is less than the refractive index of the microlens portion 300, so that the side wall of the second lens portion 320 can converge the large-angle light of the light-emitting unit 210, thereby enhancing the light extraction efficiency of the organic light-emitting display panel at a normal viewing angle or a small viewing angle, and improving the display effect of the organic light-emitting display panel.

[0046] In the present embodiment, the first lens portion 310 includes a first top surface 311. In the top view of the organic light emitting display panel, the first top surface 311 overlaps with the light emitting unit 210. By arranging the first top surface 311 to overlap with the light emitting unit 210, the top surface of the first lens portion 310 can completely cover the light emitting unit 210, ensuring that when the light emitted from the light emitting unit 210 is incident on the interface between the first top surface 311 of the first lens portion 310 and the flat layer 400, it can be refracted, so that the emitted light is gathered in the normal direction of the substrate 100, that is, the light is gathered to the front view angle.

[0047] The first top surface 311 overlaps with the light emitting unit 210 , that is, a difference CD between a diameter L4 of the light emitting unit 210 and a diameter L2 of the first top surface 311 is zero.

[0048] In this embodiment, the first lens portion 310 further includes a first bottom surface 312 , a first side surface 313 and a second side surface 314 , and the first bottom surface 312 , the first side surface 313 , the first top surface 311 and the second side surface 314 are sequentially connected.

[0049] In this embodiment, the first side surface 313 is inclined relative to the normal line of the substrate 100 , and the second side surface 314 is inclined relative to the normal line of the substrate 100 .

[0050] In this embodiment, the first side surface 313 is an arc-shaped surface, and the second side surface 314 is an arc-shaped surface.

[0051] In this embodiment, reference Figure 4 , the angle formed by the first side surface 313 and the first bottom surface 312 is equal to the angle formed by the second side surface 314 and the first bottom surface 312. By setting the angle formed by the first side surface 313 and the first bottom surface 312 to be equal to the angle formed by the second side surface 314 and the first bottom surface 312, compared with the solution in which the angle formed by the first side surface 313 and the first bottom surface 312 is not equal to the angle formed by the second side surface 314 and the first bottom surface 312, the scattering of the light passing through the first lens portion 310 can be reduced, ensuring that the light emitted from the first lens portion 310 is more uniform.

[0052] In this embodiment, the cross section of the first lens portion 310 is trapezoidal.

[0053] In this embodiment, reference Figure 5 The second lens portion 320 includes a second bottom surface 321, a third side surface 322, a second top surface 323 and a fourth side surface 324. The second bottom surface 321, the third side surface 322, the second top surface 323 and the fourth side surface 324 are connected in sequence. The third side surface 322 and the fourth side surface 324 are both inclined. The distance from the third side surface 322 to the first lens portion 310 is smaller than the distance from the fourth side surface 324 to the first lens portion 310. The angle formed by the third side surface 322 and the second bottom surface 321 is smaller than the angle formed by the fourth side surface 324 and the second bottom surface 321. By setting the distance from the third side surface 322 to the first lens portion 310 to be smaller than the distance from the fourth side surface 324 to the first lens portion 310, the angle formed by the third side surface 322 and the second bottom surface 321 is smaller than the angle formed by the fourth side surface 324 and the second bottom surface 321, so that the taper angle of the fourth inclined surface on the side of the second lens portion 320 away from the first lens portion 310 is larger, thereby increasing the amount of large-angle light from the light-emitting unit 210 that can be irradiated to the fourth side surface 324, ensuring that the fourth side surface 324 can refract more light so that the light can be emitted in the forward direction, thereby enhancing the light emission efficiency of the organic light-emitting display panel at a normal viewing angle or a small viewing angle.

[0054] In this embodiment, the third side surface 322 is inclined relative to the normal line of the substrate 100 , and the fourth side surface 324 is inclined relative to the normal line of the substrate 100 .

[0055] In this embodiment, the angle formed by the third side surface 322 and the second bottom surface 321 is 40°-80°. Preferably, the angle formed by the third side surface 322 and the second bottom surface 321 is 40°, 50°, 60° or 70°.

[0056] In the present embodiment, the angle formed by the fourth side surface 324 and the second bottom surface 321 is 50°-80°. Preferably, the angle formed by the fourth side surface 324 and the second bottom surface 321 is 50°, 60° or 70°. Wherein, when the angle formed by the fourth side surface 324 and the second bottom surface 321 is 50°, the angle formed by the third side surface 322 and the second bottom surface 321 is less than 50 degrees, when the angle formed by the fourth side surface 324 and the second bottom surface 321 is 60°, the angle formed by the third side surface 322 and the second bottom surface 321 is less than 60 degrees, when the angle formed by the fourth side surface 324 and the second bottom surface 321 is 70 degrees, the angle formed by the third side surface 322 and the second bottom surface 321 is less than 70 degrees. In the present embodiment, the cross section of the second lens portion 320 is trapezoidal.

[0057] In this embodiment, the spacing L1 between the first lens portion 310 and the second lens portion 320 is 1um-7um. By setting the spacing L1 between the first lens portion 310 and the second lens portion 320 to be 1um-7um, the light of the light-emitting unit 210 that is totally reflected by the top surface of the first lens can be irradiated to the second lens portion 320, and reflected and refracted by the second lens portion 320 to the organic light-emitting display panel to emit light in the forward direction or at a small angle. Preferably, the spacing L1 between the first lens portion 310 and the second lens portion 320 is 1um, 2um, 3um, 3.5um, 4um, 4.5um, 5um, 6um or 7um.

[0058] In this embodiment, the width L3 of the second top surface 323 is 0.1um-2um. By setting the width L3 of the second top surface 323 to 0.1um-2um. Preferably, the width L3 of the second top surface 323 is 0.1um, 0.3um, 0.5um, 0.7um, 0.9um, 1.0um, 1.2um, 1.5um, 1.8um or 2um.

[0059] In the present embodiment, the organic light emitting display panel further includes an encapsulation layer 500 , and the encapsulation layer 500 is disposed between the microlens portion 300 and the light emitting layer 200 .

[0060] In this embodiment, the encapsulation layer 500 includes a first inorganic layer 510, a first organic layer 520 and a second inorganic layer 530. The first inorganic layer 510 is disposed on a surface of the light-emitting layer 200 away from the substrate 100, the first organic layer 520 is disposed on a surface of the first inorganic layer 510 away from the substrate 100, and the second inorganic layer 530 is disposed on a surface of the first organic layer 520 away from the substrate 100.

[0061] A second embodiment of the present application provides an organic light emitting display panel, referring to Figure 8-Figure 12 The organic light emitting display panel includes a substrate 100 , a light emitting layer 200 , a micro lens portion 300 and a planar layer 400 .

[0062] Specifically, the light-emitting layer 200 is disposed on the substrate 100, and the light-emitting layer 200 includes a plurality of light-emitting units 210; the microlens portion 300 is disposed on a side of the light-emitting layer 200 away from the substrate 100, and the microlens portion 300 includes a first lens portion 310 and a second lens portion 320, the second lens portion 320 surrounds the first lens portion 310, a groove 325 is provided on the second lens portion 320, and a side wall of the groove 325 close to the first lens portion 310 is inclined relative to the normal of the substrate 100, and in a top view of the organic light-emitting display panel, the first lens portion 310 overlaps with the light-emitting unit 210; the flat layer 400 covers the microlens portion 300, and the refractive index of the flat layer 400 is less than the refractive index of the microlens portion 300.

[0063] The microlens portion 300 includes a first lens portion 310 and a second lens portion 320, the second lens portion 320 surrounds the first lens portion 310, a groove 325 is provided on the second lens portion 320, and the side wall of the groove 325 close to the first lens portion 310 is inclined relative to the normal of the substrate 100. In the top view of the organic light emitting display panel, the first lens portion 310 overlaps with the light emitting unit 210, and a flat layer 400 is provided to cover the microlens portion 300, and the refractive index of the flat layer 400 is less than the refractive index of the microlens portion 300, so that the side wall of the second lens portion 320 and the inclined side wall of the groove 325 can converge the large-angle light of the light emitting unit 210, thereby enhancing the light extraction efficiency of the organic light emitting display panel at a normal viewing angle or a small viewing angle, and improving the display effect of the organic light emitting display panel; at the same time, due to the provision of the groove 325, the distance between the first lens portion 310 and the second lens portion 320 can be reduced, so that the distance between the first lens portion 310 and the second lens portion 320 is closer.

[0064] In the present embodiment, the first lens portion 310 includes a first top surface 311 . In a top view of the organic light emitting display panel, the first top surface 311 overlaps with the light emitting unit 210 .

[0065] The first top surface 311 overlaps with the light emitting unit 210 , that is, a difference CD between a diameter L4 of the light emitting unit 210 and a diameter L2 of the first top surface 311 is zero.

[0066] In this embodiment, the first lens portion 310 further includes a first bottom surface 312 , a first side surface 313 and a second side surface 314 , and the first bottom surface 312 , the first side surface 313 , the first top surface 311 and the second side surface 314 are sequentially connected.

[0067] In this embodiment, the first side surface 313 is inclined relative to the normal line of the substrate 100 , and the second side surface 314 is inclined relative to the normal line of the substrate 100 .

[0068] In this embodiment, the first side surface 313 is an arc-shaped surface, and the second side surface 314 is an arc-shaped surface.

[0069] In this embodiment, the angle formed by the first side surface 313 and the first bottom surface 312 is equal to the angle formed by the second side surface 314 and the first bottom surface 312. By setting the angle formed by the first side surface 313 and the first bottom surface 312 to be equal to the angle formed by the second side surface 314 and the first bottom surface 312, compared with the solution in which the angle formed by the first side surface 313 and the first bottom surface 312 is not equal to the angle formed by the second side surface 314 and the first bottom surface 312, the scattering of the light passing through the first lens portion 310 can be reduced, ensuring that the light emitted from the first lens portion 310 is more uniform.

[0070] In this embodiment, the cross section of the first lens portion 310 is trapezoidal.

[0071] In this embodiment, the second lens portion 320 includes a second bottom surface 321, a third side surface 322, a second top surface 323 and a fourth side surface 324. The second bottom surface 321, the third side surface 322, the second top surface 323 and the fourth side surface 324 are connected in sequence. The distance from the third side surface 322 to the first lens portion 310 is smaller than the distance from the fourth side surface 324 to the first lens portion 310. The angle formed by the third side surface 322 and the second bottom surface 321 is smaller than the angle formed by the fourth side surface 324 and the second bottom surface 321.

[0072] In this embodiment, the angle formed by the third side surface 322 and the second bottom surface 321 is 40°-80°. Preferably, the angle formed by the third side surface 322 and the second bottom surface 321 is 40°, 50°, 60° or 70°.

[0073] In this embodiment, the angle formed by the fourth side surface 324 and the second bottom surface 321 is 50°-80°. Preferably, the angle formed by the fourth side surface 324 and the second bottom surface 321 is 50°, 60° or 70°. Wherein, when the angle formed by the fourth side surface 324 and the second bottom surface 321 is 50°, the angle formed by the third side surface 322 and the second bottom surface 321 is less than 50 degrees, when the angle formed by the fourth side surface 324 and the second bottom surface 321 is 60°, the angle formed by the third side surface 322 and the second bottom surface 321 is less than 60 degrees, and when the angle formed by the fourth side surface 324 and the second bottom surface 321 is 70 degrees, the angle formed by the third side surface 322 and the second bottom surface 321 is less than 70 degrees.

[0074] In this embodiment, the third side surface 322 is inclined relative to the normal line of the substrate 100 , and the fourth side surface 324 is inclined relative to the normal line of the substrate 100 .

[0075] In this embodiment, the cross section of the second lens portion 320 is trapezoidal.

[0076] In this embodiment, the spacing L1 between the first lens portion 310 and the second lens portion 320 is 1um-7um. By setting the spacing L1 between the first lens portion 310 and the second lens portion 320 to be 1um-7um, the light of the light-emitting unit 210 that is totally reflected by the top surface of the first lens can be irradiated to the second lens portion 320, and reflected and refracted by the second lens portion 320 to the organic light-emitting display panel to emit light in the forward direction or at a small angle. Preferably, the spacing L1 between the first lens portion 310 and the second lens portion 320 is 1um, 2um, 3um, 3.5um, 4um, 4.5um, 5um, 6um or 7um.

[0077] In this embodiment, the width L3 of the second top surface 323 is 0.1um-2um. By setting the width L3 of the second top surface 323 to 0.1um-2um. Preferably, the width L3 of the second top surface 323 is 0.1um, 0.3um, 0.5um, 0.7um, 0.9um, 1.0um, 1.2um, 1.5um, 1.8um or 2um.

[0078] In this embodiment, a groove 325 is provided on the second lens portion 320 , and a side wall of the groove 325 close to the first lens portion 310 is inclined relative to the normal line of the substrate 100 .

[0079] In this embodiment, the size of the opening of the groove 325 on the side away from the substrate 100 is larger than the size of the opening of the groove 325 on the side close to the substrate 100. By setting the size of the opening of the groove 325 on the side away from the substrate 100 to be larger than the size of the opening of the groove 325 on the side close to the substrate 100, the side wall of the groove 325 on the side close to the first lens portion 310 can form an inclined surface, thereby ensuring that the side wall on the right side of the groove 325 can refract the large-angle light of the light-emitting unit 210, so that the emitted light is gathered in the normal direction of the substrate 100, that is, the light is gathered to a small-angle viewing angle.

[0080] In this embodiment, the width L5 of the opening of the groove 325 away from the substrate 100 is 0.1um-2um. Preferably, the width L5 of the opening of the groove 325 away from the substrate 100 is 0.3um, 0.5um, 0.7um, 0.9um, 1.0um, 1.2um, 1.5um, 1.8um or 2um.

[0081] In this embodiment, the ratio of the depth L6 of the groove 325 to the thickness of the second lens portion 320 is not greater than 4 / 5. Preferably, the ratio of the depth L6 of the groove 325 to the thickness of the second lens portion 320 is 4 / 5, 7 / 10, 3 / 5 or 1 / 2.

[0082] In the present embodiment, the shape of the groove 325 includes at least one of a trapezoidal shape, a hemispherical shape, an ellipsoidal shape or a conical shape.

[0083] In the present embodiment, the organic light emitting display panel further includes an encapsulation layer 500 , and the encapsulation layer 500 is disposed between the microlens portion 300 and the light emitting layer 200 .

[0084] In this embodiment, the encapsulation layer 500 includes a first inorganic layer 510, a first organic layer 520 and a second inorganic layer 530. The first inorganic layer 510 is disposed on a surface of the light-emitting layer 200 away from the substrate 100, the first organic layer 520 is disposed on a surface of the first inorganic layer 510 away from the substrate 100, and the second inorganic layer 530 is disposed on a surface of the first organic layer 520 away from the substrate 100.

[0085] A third embodiment of the present application provides an organic light emitting display panel, referring to Figure 18-Figure 18 The third embodiment is similar to the second embodiment. The difference between the third embodiment and the second embodiment is that the first lens portion 310 includes a first top surface 311. In the top view of the organic light-emitting display panel, the first top surface 311 overlaps with a portion of the light-emitting unit 210.

[0086] In this embodiment, in the top view of the organic light emitting display panel, the difference CD between the diameter L4 of the light emitting unit 210 and the diameter L2 of the first top surface 311 is not greater than 1.0 um. Preferably, the difference CD between the diameter L4 of the light emitting unit 210 and the diameter L2 of the first top surface 311 is 0.5 um, 0.6 um, 0.57 um, 0.8 um or 1.0 um.

[0087] In this embodiment, the first lens portion 310 further includes a first bottom surface 312 , a first side surface 313 and a second side surface 314 , and the first bottom surface 312 , the first side surface 313 , the first top surface 311 and the second side surface 314 are sequentially connected.

[0088] In this embodiment, the first side surface 313 is inclined and the second side surface 314 is inclined.

[0089] In this embodiment, the angle formed by the first side surface 313 and the first bottom surface 312 is equal to the angle formed by the second side surface 314 and the first bottom surface 312. By setting the angle formed by the first side surface 313 and the first bottom surface 312 to be equal to the angle formed by the second side surface 314 and the first bottom surface 312, compared with the solution in which the angle formed by the first side surface 313 and the first bottom surface 312 is not equal to the angle formed by the second side surface 314 and the first bottom surface 312, the scattering of the light passing through the first lens portion 310 can be reduced, ensuring that the light emitted from the first lens portion 310 is more uniform.

[0090] In this embodiment, the cross section of the first lens portion 310 is trapezoidal.

[0091] In this embodiment, the second lens portion 320 includes a second bottom surface 321, a third side surface 322, a second top surface 323 and a fourth side surface 324. The second bottom surface 321, the third side surface 322, the second top surface 323 and the fourth side surface 324 are connected in sequence. The distance from the third side surface 322 to the first lens portion 310 is smaller than the distance from the fourth side surface 324 to the first lens portion 310. The angle formed by the third side surface 322 and the second bottom surface 321 is smaller than the angle formed by the fourth side surface 324 and the second bottom surface 321.

[0092] In this embodiment, the angle formed by the third side surface 322 and the second bottom surface 321 is 40°-80°. Preferably, the angle formed by the third side surface 322 and the second bottom surface 321 is 40°, 50°, 60° or 70°.

[0093] In this embodiment, the angle formed by the fourth side surface 324 and the second bottom surface 321 is 50°-80°. Preferably, the angle formed by the fourth side surface 324 and the second bottom surface 321 is 50°, 60° or 70°. Wherein, when the angle formed by the fourth side surface 324 and the second bottom surface 321 is 50°, the angle formed by the third side surface 322 and the second bottom surface 321 is less than 50 degrees, when the angle formed by the fourth side surface 324 and the second bottom surface 321 is 60°, the angle formed by the third side surface 322 and the second bottom surface 321 is less than 60 degrees, and when the angle formed by the fourth side surface 324 and the second bottom surface 321 is 70 degrees, the angle formed by the third side surface 322 and the second bottom surface 321 is less than 70 degrees.

[0094] In this embodiment, the third side surface 322 is inclined relative to the normal line of the substrate 100 , and the fourth side surface 324 is inclined relative to the normal line of the substrate 100 .

[0095] In this embodiment, the cross section of the second lens portion 320 is trapezoidal.

[0096] In this embodiment, the spacing L1 between the first lens portion 310 and the second lens portion 320 is 1um-7um. By setting the spacing L1 between the first lens portion 310 and the second lens portion 320 to be 1um-7um, the light of the light-emitting unit 210 that is totally reflected by the top surface of the first lens can be irradiated to the second lens portion 320, and reflected and refracted by the second lens portion 320 to the organic light-emitting display panel to emit light in the forward direction or at a small angle. Preferably, the spacing L1 between the first lens portion 310 and the second lens portion 320 is 1um, 2um, 3um, 3.5um, 4um, 4.5um, 5um, 6um or 7um.

[0097] In this embodiment, the width L3 of the second top surface 323 is 0.1um-2um. By setting the width L3 of the second top surface 323 to 0.1um-2um. Preferably, the width L3 of the second top surface 323 is 0.1um, 0.3um, 0.5um, 0.7um, 0.9um, 1.0um, 1.2um, 1.5um, 1.8um or 2um.

[0098] In this embodiment, a groove 325 is provided on the second lens portion 320, and a side wall of the groove 325 close to the first lens portion 310 is inclined relative to the normal line of the substrate 100. By providing the groove 325, the distance between the first lens portion 310 and the second lens portion 320 can be reduced, so that the distance between the first lens portion 310 and the second lens portion 320 is closer.

[0099] In this embodiment, the size of the opening of the groove 325 at a side away from the substrate 100 is larger than the size of the opening of the groove 325 at a side close to the substrate 100 .

[0100] In this embodiment, the width L5 of the opening of the groove 325 away from the substrate 100 is 0.1um-2um. Preferably, the width L5 of the opening of the groove 325 away from the substrate 100 is 0.3um, 0.5um, 0.7um, 0.9um, 1.0um, 1.2um, 1.5um, 1.8um or 2um.

[0101] In this embodiment, the ratio of the depth L6 of the groove 325 to the thickness of the second lens portion 320 is not greater than 4 / 5. Preferably, the ratio of the depth L6 of the groove 325 to the thickness of the second lens portion 320 is 4 / 5, 7 / 10, 3 / 5 or 1 / 2.

[0102] In the present embodiment, the shape of the groove 325 includes at least one of a trapezoidal shape, a hemispherical shape, an ellipsoidal shape or a conical shape.

[0103] In the present embodiment, the organic light emitting display panel further includes an encapsulation layer 500 , and the encapsulation layer 500 is disposed between the microlens portion 300 and the light emitting layer 200 .

[0104] In this embodiment, the encapsulation layer 500 includes a first inorganic layer 510, a first organic layer 520 and a second inorganic layer 530. The first inorganic layer 510 is disposed on a surface of the light-emitting layer 200 away from the substrate 100, the first organic layer 520 is disposed on a surface of the first inorganic layer 510 away from the substrate 100, and the second inorganic layer 530 is disposed on a surface of the first organic layer 520 away from the substrate 100.

[0105] Experimental example:

[0106] A plurality of organic light emitting display panels with different structures are taken, and a control variable method is used to control the distance L1 between the first lens portion 310 and the second lens portion 320 of the organic display panel, the size of the taper angle of the second lens portion 320, the difference between the width of the first top surface 311 of the first lens portion 310 and the width of the light emitting unit 210, the width L3 of the second top surface 323 of the second lens portion 320, the width of the groove 325, and the depth L6 of the groove 325. The light extraction enhancement rate of the organic light emitting display panel when the light extraction angle is 0° and the light extraction efficiency of the organic light emitting display panel when the light extraction angle is 30° are respectively detected.

[0107] Example 1

[0108] An organic light emitting display panel, referring to Figure 1-Figure 7 The organic light emitting display panel includes a substrate 100, a light emitting layer 200, a microlens portion 300 and a flat layer 400. The light emitting layer 200 is disposed on the substrate 100, and the light emitting layer 200 includes a plurality of light emitting units 210. The microlens portion 300 is disposed on a side of the light emitting layer 200 away from the substrate 100. The flat layer 400 covers the microlens portion 300. The microlens portion 300 includes a first lens portion 310 and a second lens portion 320. The second lens portion 320 surrounds the first lens portion 310. In a top view of the organic light emitting display panel, the first lens portion 310 overlaps with the light emitting unit 210. The first lens portion 310 includes a first top surface 311. In a top view of the organic light emitting display panel, the first top surface 311 overlaps with the light emitting unit 210.

[0109] Among them, when the taper angle of the second lens portion 320 is 50° and the width L3 of the second top surface 323 of the second lens portion 320 is 0.5um, the distance L1 between the first lens portion 310 and the second lens portion 320 is adjusted; when the distance L1 between the first lens portion 310 and the second lens portion 320 is 4um and the width L3 of the second top surface 323 of the second lens portion 320 is 0.5um, the taper angle of the second lens portion 320 is adjusted.

[0110] Example 2

[0111] An organic light emitting display panel, referring to Figure 8-Figure 14The organic light emitting display panel includes a substrate 100, a light emitting layer 200, a microlens portion 300 and a flat layer 400. The light emitting layer 200 is disposed on the substrate 100. The light emitting layer 200 includes a plurality of light emitting units 210. The microlens portion 300 is disposed on a side of the light emitting layer 200 away from the substrate 100. The flat layer 400 covers the microlens portion 300. The microlens portion 300 includes a first lens portion 310 and a second lens portion 320. The second lens portion 320 surrounds the first lens portion 310. In a top view of the organic light emitting display panel, the first lens portion 310 overlaps with the light emitting unit 210. A groove 325 is disposed on the second lens portion 320. The first lens portion 310 includes a first top surface 311. In a top view of the organic light emitting display panel, the first top surface 311 overlaps with the light emitting unit 210.

[0112] Among them, when the taper angle of the second lens portion 320 is 70° and the width L5 of the opening of the groove 325 on the side away from the substrate 100 is 0.5um, the depth L6 of the groove 325 is adjusted; when the taper angle of the second lens portion 320 is 70° and the depth L6 of the groove 325 is adjusted to 0.3um, the width L5 of the opening of the groove 325 on the side away from the substrate 100 is adjusted; when the width L5 of the opening of the groove 325 on the side away from the substrate 100 is 0.5um and the depth L6 of the groove 325 is 0.3um, the taper angle of the second lens portion 320 is adjusted.

[0113] Example 3

[0114] An organic light emitting display panel, referring to Figure 15-Figure 20 The organic light emitting display panel includes a substrate 100, a light emitting layer 200, a microlens portion 300 and a flat layer 400. The light emitting layer 200 is disposed on the substrate 100. The light emitting layer 200 includes a plurality of light emitting units 210. The microlens portion 300 is disposed on a side of the light emitting layer 200 away from the substrate 100. The flat layer 400 covers the microlens portion 300. The microlens portion 300 includes a first lens portion 310 and a second lens portion 320. The second lens portion 320 surrounds the first lens portion 310. In a top view of the organic light emitting display panel, the first lens portion 310 overlaps with the light emitting unit 210. A groove 325 is disposed on the second lens portion 320. The first lens portion 310 includes a first top surface 311. In a top view of the organic light emitting display panel, the first top surface 311 overlaps with a portion of the light emitting unit 210.

[0115] When the difference between the width of the first top surface 311 of the first lens portion 310 and the width of the light-emitting unit 210 is 0.5um or 1.0um respectively, the taper angle of the second lens is adjusted; when the taper angle of the second lens portion 320 is 60°, 70° or 80° respectively, the difference between the width of the first top surface 311 of the first lens portion 310 and the width of the light-emitting unit 210 is adjusted.

[0116] Comparative Example 1, an organic light emitting display panel, comprising a substrate 100, a light emitting layer 200, a microlens portion 300 and a flat layer 400, wherein the light emitting layer 200 is disposed on the substrate 100, the microlens portion 300 is disposed on a side of the light emitting layer 200 away from the substrate 100, and the flat layer 400 covers the microlens portion 300;

[0117] Among them, the lens used by the organic light emitting display panel is a single lens.

[0118] Comparative Example 2, an organic light emitting display panel, comprising a substrate 100, a light emitting layer 200, a microlens portion 300 and a planar layer 400, wherein the light emitting layer 200 is disposed on the substrate 100, the microlens portion 300 is disposed on a side of the light emitting layer 200 away from the substrate 100, and the planar layer 400 covers the microlens portion 300;

[0119] The micro lens portion 300 of the organic light emitting display panel is a single lens, and the width of the top surface of the micro lens is adjusted.

[0120] By comparing Example 1 with Comparative Example 1, it can be seen that, under the premise of keeping the 0° light extraction efficiency unchanged, when the taper angle of the second lens portion 320 is 50° or 60 degrees, the spacing between the first lens portion 310 and the second lens portion 320 is 3um or 4um, and the width L3 of the second top surface 323 of the second lens portion 320 is 0.5um, the 30° light extraction can be improved by more than 2%; under the premise of keeping the 30° light extraction efficiency unchanged, when the taper angle of the second lens portion 320 is 70°, the spacing between the first lens portion 310 and the second lens portion 320 is 4um, and the width L3 of the second top surface 323 of the second lens portion 320 is 0.5um, the 0° light extraction can be improved by more than 3%.

[0121] By comparing Example 2 with Comparative Example 1, it can be seen that, under the premise that the light extraction efficiency at 0° remains unchanged, when the taper angle of the second lens portion 320 is 60°, the etching width of the groove 325 is 0.5um, and the etching depth is 0.3um, the light extraction efficiency at 30° can be improved by more than 1%;

[0122] Under the premise that the light extraction efficiency at 30° remains unchanged, when the taper angle of the second lens portion 320 is 70°, the etching width of the groove 325 is 0.5um or 0.4um, and the etching depth is 0.3um, the light extraction efficiency at 0° can be improved by more than 1.8%.

[0123] By comparing Example 2 with Comparative Example 1, it can be seen that the difference between the width of the first top surface 311 of the first lens portion 310 and the width of the light-emitting unit 210 is 0.5um, and when the taper angle of the second lens portion 320 is 70°, the light extraction efficiency at 0° can be reduced by 1%, and the light extraction efficiency at 30° can be improved by more than 2%.

[0124] It should be noted that the 0° light output means that the angle formed by the light output angle and the normal line of the substrate is 0°, and the 30° light output means that the angle formed by the light output angle and the normal line of the substrate is 30°.

[0125] In summary, the present application provides an organic light-emitting display panel, which includes a first lens portion 310 and a second lens portion 320 by setting a microlens portion 300, wherein the second lens portion 320 surrounds the first lens portion 310. In a top view of the organic light-emitting display panel, the first lens portion 310 overlaps with the light-emitting unit 210, and a flat layer 400 is set to cover the microlens portion 300, and the refractive index of the flat layer 400 is less than the refractive index of the microlens portion 300, so that the side wall of the second lens portion 320 can converge the large-angle light of the light-emitting unit 210, thereby enhancing the light extraction efficiency of the organic light-emitting display panel at a normal viewing angle or a small viewing angle, and improving the display effect of the organic light-emitting display panel.

[0126] The above is a detailed description of the specific implementation of the present application. The above implementation disclosed in the present application is only the preferred implementation of the present application. For ordinary technicians in this field, many modifications and improvements can be made without departing from the concept of the present application. These modifications and improvements all fall within the scope of protection defined by the claims of the present application.

Claims

1. An organic light emitting display panel, characterized in that: include: substrate; A light-emitting layer, the light-emitting layer is disposed on the substrate, and the light-emitting layer includes a plurality of light-emitting units; A microlens portion, the microlens portion is disposed on a side of the light-emitting layer away from the substrate, the microlens portion includes a first lens portion and a second lens portion, the second lens portion surrounds the first lens portion, and in a top view of the organic light-emitting display panel, the first lens portion overlaps with the light-emitting unit; A flat layer covers the microlens portion, and a refractive index of the flat layer is smaller than a refractive index of the microlens portion.

2. The organic light emitting display panel according to claim 1, characterized in that: The first lens portion includes a first top surface, and in a top view of the organic light emitting display panel, the first top surface overlaps with at least a portion of the light emitting unit.

3. The organic light emitting display panel according to claim 2, characterized in that: The second lens portion includes a second bottom surface, a third side surface, a second top surface and a fourth side surface, the second bottom surface, the third side surface, the second top surface and the fourth side surface are connected in sequence, the distance from the third side surface to the first lens portion is smaller than the distance from the fourth side surface to the first lens portion, and the angle formed by the third side surface and the second bottom surface is smaller than the angle formed by the fourth side surface and the second bottom surface.

4. The organic light emitting display panel according to claim 3, characterized in that: The width of the second top surface is 0.1um-2um.

5. The organic light emitting display panel according to any one of claims 1 to 4, characterized in that: The second lens portion is provided with a groove, and a side wall of the groove on a side close to the first lens portion is inclined relative to a normal line of the substrate.

6. The organic light emitting display panel according to claim 5, characterized in that: The size of the opening of the groove at a side away from the substrate is larger than the size of the opening of the groove at a side close to the substrate.

7. The organic light emitting display panel according to claim 5, characterized in that: The width of the opening of the groove away from the substrate is 0.1um-2um.

8. The organic light emitting display panel according to claim 5, characterized in that: The ratio of the depth of the groove to the thickness of the second lens portion is no greater than 4 / 5.

9. The organic light emitting display panel according to claim 5, characterized in that: The shape of the groove includes at least one of a trapezoid, a hemispherical shape, an ellipsoidal shape or a cone shape.

10. The organic light emitting display panel according to claim 1, characterized in that: The distance between the first lens portion and the second lens portion is 1um-7um.

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