CN113782695A

CN113782695A - Display panel and display device

Info

Publication number: CN113782695A
Application number: CN202111159550.4A
Authority: CN
Inventors: 王艳明; 韩城; 李鑫; 樊星; 李旭
Original assignee: BOE Technology Group Co Ltd
Current assignee: BOE Technology Group Co Ltd
Priority date: 2021-09-30
Filing date: 2021-09-30
Publication date: 2021-12-10

Abstract

The application discloses display panel and display device relates to and shows technical field. The method comprises the steps of determining the magnitude relation between the refractive index of a flat structure layer (104) in a display panel (10) and the refractive index of a lens structure (103) based on the magnitude relation between the luminance decay speed of a first color sub-pixel (102a) and the luminance decay speed of a second color sub-pixel (102b) in the display panel (10), enabling the luminance decay speed of the first color sub-pixel (102a) and the luminance decay speed of the second color sub-pixel (102b) to be consistent as much as possible, and improving the display effect of the display panel (10).

Description

Display panel and display device

Technical Field

The present disclosure relates to display technologies, and particularly to a display panel and a display device.

Background

An Organic Light Emitting Diode (OLED) display panel generally includes a plurality of OLED pixels, each of which includes a plurality of sub-pixels of different colors.

In the related art, the sub-pixels of different colors emit light of different wavelengths, and the light-emitting regions of the sub-pixels of different colors have different shapes and sizes. Therefore, as the viewing angle increases, the luminance decay rates of the sub-pixels with different colors are different, and the display effect of the display panel is poor.

Disclosure of Invention

The application provides a display panel and a display device, which can solve the problem of poor display effect of the display panel in the related art. The technical scheme is as follows:

in one aspect, there is provided a display panel including:

a substrate base plate;

a plurality of different color sub-pixels located at one side of the substrate base plate;

a plurality of lens structures located on a side of the plurality of different color sub-pixels away from the substrate base plate, wherein orthographic projections of the plurality of lens structures on the substrate base plate overlap with orthographic projections of light-emitting areas of first color sub-pixels in the plurality of different color sub-pixels on the substrate base plate, and do not overlap with orthographic projections of light-emitting areas of second color sub-pixels in the plurality of different color sub-pixels on the substrate base plate;

and the flat structure layer is positioned on one side of the lens structures far away from the substrate base plate, and the refractive index of the flat structure layer is different from that of the lens structures.

Optionally, the brightness decay rate of the first color sub-pixel is greater than the brightness decay rate of the second color sub-pixel;

the plurality of lens structures are used for converging the light rays emitted by the first color sub-pixel and transmitting the converged light rays to the flat structure layer.

Optionally, the refractive index of the flat structure layer is greater than that of the lens structure, and the lens structure is a concave lens.

Optionally, the refractive index of the flat structure layer is smaller than that of the lens structure, and the lens structure is a convex lens.

Optionally, the plurality of sub-pixels of different colors further include a sub-pixel of a third color, and orthographic projections of the plurality of lens structures on the substrate do not overlap with orthographic projections of the light emitting areas of the sub-pixels of the third color on the substrate;

the first color sub-pixel is a blue sub-pixel, the second color sub-pixel is one of a red sub-pixel and a green sub-pixel, and the third color sub-pixel is the other of the red sub-pixel and the green sub-pixel.

Optionally, the brightness decay rate of the second color sub-pixel is greater than the brightness decay rate of the first color sub-pixel;

the plurality of lens structures are used for diverging the light rays emitted by the first color sub-pixel and transmitting the diverged light rays to the flat structure layer.

Optionally, the refractive index of the flat structure layer is greater than that of the lens structure, and the lens structure is a convex lens.

Optionally, the refractive index of the flat structure layer is smaller than that of the lens structure, and the lens structure is a concave lens.

Optionally, the plurality of sub-pixels of different colors further include a sub-pixel of a third color, and orthographic projections of the plurality of lens structures on the substrate and orthographic projections of the light emitting areas of the sub-pixels of the third color on the substrate are also overlapped;

the first color sub-pixel is one of a red sub-pixel and a green sub-pixel, the second color sub-pixel is a blue sub-pixel, and the third sub-pixel is the other of the red sub-pixel and the green sub-pixel.

Optionally, the substrate base plate has a planar display area and a curved display area; the orthographic projections of the lens structures on the substrate base plate are positioned in the curved surface display area.

Optionally, orthographic projections of the plurality of lens structures on a substrate are overlapped with orthographic projections of the non-light emitting areas of the plurality of sub-pixels located in the curved display area on the substrate.

Optionally, the display panel further includes: packaging the film layer;

the packaging film layer is located between the plurality of sub-pixels and the plurality of lens structures and used for packaging the plurality of sub-pixels, and one surface, far away from the plurality of sub-pixels, of the packaging film layer is a plane.

Optionally, the encapsulation film layer includes: the substrate comprises a first inorganic material layer, an organic material layer and a second inorganic material layer which are sequentially stacked along one side far away from the substrate base plate.

Optionally, each of the sub-pixels includes: the anode layer, the light-emitting layer and the cathode layer are sequentially stacked along the direction far away from the substrate; the display panel further includes: a pixel defining layer;

the pixel defining layer is positioned between the anode layer and the light emitting layer and is provided with a plurality of hollowed-out areas, and each hollowed-out area is used for exposing the anode layer of one sub-pixel.

In another aspect, there is provided a display device including: a power supply assembly, and a display panel as described in the above aspect;

the power supply assembly is connected with the display panel and used for supplying power to the display panel.

The beneficial effect that technical scheme that this application provided brought includes at least:

the application provides a display panel and a display device, based on the magnitude relation of the brightness decay speed of a first color sub-pixel and the brightness decay speed of a second color sub-pixel in the display panel, the magnitude relation of the refractive index of a flat structure layer in the display panel and the refractive index of a lens structure is determined, and then the brightness decay speed of the first color sub-pixel and the brightness decay speed of the second color sub-pixel are kept consistent as far as possible, and the display effect of the display panel is improved.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.

FIG. 1 is a graph of spectral tristimulus values provided by embodiments of the present application;

fig. 2 is a schematic view illustrating an observation angle and brightness according to an embodiment of the present disclosure;

FIG. 3 is a diagram illustrating a display effect of a display panel according to the related art;

FIG. 4 is a partial schematic view of FIG. 3;

fig. 5 is a schematic structural diagram of a display panel according to an embodiment of the present disclosure;

fig. 6 is a schematic structural diagram of another display panel provided in an embodiment of the present application;

FIG. 7 is a partial structural schematic view of the lens structure and the planar structure layer shown in FIG. 6;

fig. 8 is a schematic structural diagram of another display panel provided in an embodiment of the present application;

FIG. 9 is a schematic partial structure view of the lens structure and the planar structure layer shown in FIG. 8;

fig. 10 is a schematic structural diagram of another display panel provided in an embodiment of the present application;

FIG. 11 is a schematic partial structure view of the lens structure and planar structure layer shown in FIG. 10;

fig. 12 is a schematic structural diagram of another display panel provided in an embodiment of the present application;

FIG. 13 is a partial structural schematic view of the lens structure and the planar structural layer shown in FIG. 12;

fig. 14 is a schematic structural diagram of a pixel according to an embodiment of the present application;

fig. 15 is a schematic structural diagram of a substrate provided in an embodiment of the present application;

FIG. 16 is a cross-sectional view along direction AA of the base substrate shown in FIG. 15;

FIG. 17 is a top view of a sub-pixel and lens structure provided in an embodiment of the present application;

FIG. 18 is a top view of another sub-pixel and lens structure provided by an embodiment of the present application;

FIG. 19 is a schematic diagram of a lens structure and a planar structure layer provided by an embodiment of the present application;

FIG. 20 is a schematic diagram of another lens structure and a planar structure layer provided by embodiments of the present application;

FIG. 21 is a schematic diagram of yet another lens structure and a planar structure layer provided by an embodiment of the present application;

FIG. 22 is a schematic diagram of yet another lens structure and a planar structure layer provided by an embodiment of the present application;

FIG. 23 is a schematic diagram of yet another lens structure and a planar structure layer provided by an embodiment of the present application;

FIG. 24 is a schematic diagram of yet another lens structure and a planar structure layer provided by an embodiment of the present application;

FIG. 25 is a schematic diagram of an electron microscope of a lens structure provided in an embodiment of the present application;

FIG. 26 is a schematic diagram of yet another lens structure and a planar structure layer provided by an embodiment of the present application;

FIG. 27 is a schematic electron microscope view of another lens structure provided in the embodiments of the present application;

fig. 28 is a schematic structural diagram of another display panel provided in an embodiment of the present application;

fig. 29 is a schematic view of an electron microscope after an encapsulation film layer is prepared according to an embodiment of the present disclosure;

FIG. 30 is a schematic view of an electron microscope after a plurality of lens structures are prepared according to an embodiment of the present disclosure;

FIG. 31 is a schematic view of another viewing angle and brightness provided by the present application;

FIG. 32 is a schematic illustration of a chromaticity diagram provided by an embodiment of the present application;

FIG. 33 is a schematic view of another viewing angle and brightness provided in the present application;

FIG. 34 is a schematic view of another chromaticity provided by the embodiment of the present application;

FIG. 35 is a schematic illustration of another exemplary embodiment of the present disclosure;

fig. 36 is a schematic structural diagram of a display device according to an embodiment of the present application.

Detailed Description

To make the objects, technical solutions and advantages of the present application more clear, embodiments of the present application will be described in further detail below with reference to the accompanying drawings.

The organic light emitting diode has the advantages of wide viewing angle, high contrast, high response speed, high brightness, low driving voltage, flexibility and the like, and is widely applied to the fields of display panels of mobile phones, flat panels, televisions, vehicles and the like.

In order to adapt the OLED display panel to various types of application scenarios, the OLED display panel is made flexible and applied to products such as a folding screen and a curved screen. However, since the white light is a mixture of red, green and blue lights in the OLED display panel, when the three colors have different attenuation speeds with the change of the viewing angle, the resultant white light is subject to color shift. Fig. 1 is a graph of the tristimulus values of the spectrum provided in the examples of the present application, wherein the abscissa is the wavelength (wavelength), the unit of the wavelength is nm (nanometers), and the ordinate is the intensity (intensity). Further, it is known from colorimetry knowledge that luminance information of light is mainly related to a Y stimulus value among spectral tristimulus values (X stimulus value, Y stimulus to Z stimulus value).

Referring to fig. 2, it can be seen that the luminance Decay (L-Decay) speed of the blue light is relatively fast, and the luminance Decay speeds of the red and green lights are relatively slow. Therefore, referring to fig. 3 and 4, in the curved display area 101b of the product such as the folded display panel and the curved display panel, the displayed color of the display panel may be yellow (color shift is generated), which affects the display effect.

In fig. 2, the abscissa may be an observation angle of view, and the unit may be degrees (°), and the ordinate is luminance. The observation angle may be an angle between the observation direction of the human eye and a normal of the light exit surface of the display panel. Assume that a straight line perpendicular to the display panel is taken as a reference line, and a plane passing through the reference line and parallel to the pixel row direction in the display panel is taken as a reference plane. In the reference plane, the clockwise direction of the reference line is the positive direction of the observation angle of view, and the counterclockwise direction is the negative direction of the observation angle of view. For example, the viewing angle range shown in FIG. 2 is 100 to 100.

In the related art, the microcavity length of each color sub-pixel 102 is adjusted to make the luminance decay rates of the sub-pixels 102 of the respective colors uniform, thereby improving the color shift problem of the display panel. Where microcavity length may be used to represent the total film thickness of the films between the anode layer 1021 and the cathode layer 1023 of the subpixel 102. However, the scheme in the related art may affect the color gamut of the display panel to some extent, and may also affect the light emitting performance of the OLED.

Fig. 5 is a schematic structural diagram of a display panel according to an embodiment of the present application. Referring to fig. 5, the display panel 10 may include: the liquid crystal display device comprises a substrate 101, a plurality of sub-pixels 102 of different colors, a plurality of lens structures 103 and a flat structure layer 104. Fig. 1 shows only 2 sub-pixels 102 and 1 lens structure 103.

The plurality of sub-pixels 102 with different colors are located on one side of the substrate 101, the plurality of lens structures 103 are located on one side of the plurality of sub-pixels 102 with different colors away from the substrate 101, and the flat structure layer 104 is located on one side of the plurality of lens structures 103 away from the substrate 101. That is, a plurality of sub-pixels 102 of different colors, a plurality of lens structures 103, and a flat structure layer 104 may be sequentially stacked in a direction away from the base substrate 101.

Referring to fig. 1, orthographic projections of a plurality of lens structures 103 on a substrate 101 overlap with orthographic projections of light emitting areas of first-color sub-pixels 102a among a plurality of different-color sub-pixels 102 on the substrate 101. And the orthographic projection of the plurality of lens structures 103 on the substrate 101 does not overlap with the orthographic projection of the light emitting region of the second color sub-pixel 102b in the plurality of different color sub-pixels 102 on the substrate 101.

In the embodiment of the present application, the refractive index of the flat structure layer 104 is different from the refractive index of the lens structure 103, so that when the light emitted from the sub-pixels 102 in the display panel 10 is irradiated from the lens structure 103 to the flat structure layer 104, the light can be refracted at the interface between the lens structure 103 and the flat structure layer 104. Alternatively, the light rays may be refracted in a direction close to the axis of the lens structure 103 (light rays converging), or refracted in a direction away from the axis of the lens structure 103 (light rays diverging). The refraction direction of the light may be related to the magnitude relationship between the refractive index of the flat structure layer 104 and the refractive index of the lens structure 103.

Since the color of the light emitted from the first color sub-pixel 102a is different from the color of the light emitted from the second color sub-pixel 102b, the luminance decay rate of the first color sub-pixel 102a is different from the luminance decay rate of the second color sub-pixel 102 b. Wherein the brightness decay rate may be used to represent: the brightness of the sub-pixel 102 decreases by how much as the viewing angle becomes larger.

Optionally, if the brightness decay rate of the first color sub-pixel 102a is greater than the brightness decay rate of the second color sub-pixel 102 b. In this case, when the viewing angle is large (for example, the viewing angle ranges from 45 ° to 60 °), the luminance of the light emitted by the first color sub-pixel 102a is lower than the luminance of the light emitted by the second color sub-pixel 102b under the same viewing angle, so that the color shift phenomenon is easily observed, and the display effect of the display panel 10 is poor.

Therefore, in the embodiment of the present application, the relationship between the refractive index of the flat structure layer 104 and the refractive index of the lens structure 103 may be determined, so that the light emitted from the first color sub-pixel 102a is refracted toward a direction close to the axis of the lens structure 103, and the brightness decay speed of the first color sub-pixel 102a is further reduced. Further, the brightness decay rate of the first color sub-pixel 102a and the brightness decay rate of the second color sub-pixel 102b can be kept consistent as much as possible, so that the color cast of the display panel 10 at different viewing angles can be avoided, and the display effect of the display panel 10 can be improved.

Of course, if the brightness decay rate of the first color sub-pixel 102a is less than the brightness decay rate of the second color sub-pixel 102 b. In this case, when the viewing angle is large (for example, the viewing angle ranges from 45 ° to 60 °), the luminance of the light emitted by the first color sub-pixel 102a is higher than the luminance of the light emitted by the second color sub-pixel 102b under the same viewing angle, and the color shift phenomenon is easily observed, which may result in poor display effect of the display panel 10.

Therefore, in the embodiment of the present application, the relationship between the refractive index of the flat structure layer 104 and the refractive index of the lens structure 103 may be determined, so that the light emitted from the first color sub-pixel 102a is refracted in a direction away from the axis of the lens structure 103, and the brightness attenuation speed of the first color sub-pixel 102a is further increased. Further, the brightness decay rate of the first color sub-pixel 102a and the brightness decay rate of the second color sub-pixel 102b can be kept consistent as much as possible, so that the color cast of the display panel 10 at different viewing angles can be avoided, and the display effect of the display panel 10 can be improved.

To sum up, the embodiment of the present application provides a display panel, based on a magnitude relationship between a luminance decay rate of a first color sub-pixel and a luminance decay rate of a second color sub-pixel in the display panel, to determine a magnitude relationship between a refractive index of a flat structure layer in the display panel and a refractive index of a lens structure, so that the luminance decay rate of the first color sub-pixel and the luminance decay rate of the second color sub-pixel are kept as consistent as possible, and a display effect of the display panel is improved.

Alternatively, the lens structure 103 may be prepared by a photolithography process, and the flat structure layer 104 may be prepared by an inkjet printing method.

As a first alternative implementation, the luminance decay rate of the first color sub-pixel 102a is greater than the luminance decay rate of the second color sub-pixel 102 b. In this case, the plurality of lens structures 103 may be configured to collect the light emitted from the first color sub-pixel 102a and transmit the collected light to the flat structure layer 104.

Since the orthographic projection of the plurality of lens structures 103 on the substrate base plate 101 overlaps with the orthographic projection of the light emitting region of the first-color sub-pixel 102a on the substrate base plate 101, the light emitted from the first-color sub-pixel 102a can be irradiated to the plurality of lens structures 103. In addition, the orthographic projections of the plurality of lens structures 103 on the substrate 101 do not overlap the orthographic projection of the light-emitting region of the second-color sub-pixel 102b on the substrate 101, so that the light emitted by the second-color sub-pixel 102b does not irradiate the plurality of lens structures 103.

Therefore, the plurality of lens structures 103 converge the light emitted from the first color sub-pixel 102a, and further can slow down the brightness decay speed of the first color sub-pixel 102 a. Moreover, the plurality of lens structures 103 do not affect the light emitted by the second color sub-pixel 102b, the light emitted by the second color sub-pixel 102b can be emitted normally, and the brightness decay rate of the second color sub-pixel 102b remains unchanged. Further, the brightness decay rate of the first color sub-pixel 102a and the brightness decay rate of the second color sub-pixel 102b can be kept consistent as much as possible, so that the color cast of the display panel 10 under different viewing angles is avoided, and the display effect of the display panel 10 can be improved.

Alternatively, referring to fig. 6, the refractive index of the flat structure layer 104 is greater than the refractive index of the lens structure 103, and the lens structure 103 may be a concave lens. Of these, only the light-emitting region of each sub-pixel 102 is shown in fig. 6.

Fig. 7 is a partial structural view of the lens structure and the flat structure layer shown in fig. 6. Referring to fig. 7, in the case that the refractive index of the flat structure layer 104 is greater than the refractive index of the lens structure 103, and the lens structure 103 is a concave lens, when light emitted from the first color sub-pixel 102a is irradiated from the lens structure 103 to the flat structure layer 104, the light may be refracted in a direction close to the axis of the lens structure 103 at the interface between the lens structure 103 and the flat structure layer 104. Therefore, the plurality of lens structures 103 can converge the light emitted by the first color sub-pixel 102a, and the brightness decay speed of the first color sub-pixel 102a can be slowed down.

Illustratively, the refractive index of the flat structure layer 104 may range from 1.65 to 1.85, and the refractive index of the lens structure 103 may range from 1.4 to 1.6. The material of the flat structure layer 104 may be organic polymer matrix doped zirconia (ZrO) or Titania (TiO) nanoparticles, and a photosensitizer. The material of the lens structure 103 may be an organic polymer material doped with a photosensitizer.

Alternatively, referring to fig. 8, the refractive index of the flat structure layer 104 is smaller than that of the lens structure 103, and the lens structure 103 may be a convex lens. Of these, only the light-emitting region of each sub-pixel 102 is shown in fig. 8.

Fig. 9 is a partial structural schematic view of the lens structure and the planar structure layer shown in fig. 8. Referring to fig. 9, in the case that the refractive index of the flat structure layer 104 is smaller than the refractive index of the lens structure 103, and the lens structure 103 is a convex lens, when light emitted from the first color sub-pixel 102a is irradiated from the lens structure 103 to the flat structure layer 104, the light may be refracted in a direction close to the axis of the lens structure 103 at the interface between the lens structure 103 and the flat structure layer 104. Therefore, the plurality of lens structures 103 can converge the light emitted by the first color sub-pixel 102a, and the brightness decay speed of the first color sub-pixel 102a can be slowed down.

Illustratively, the refractive index of the flat structure layer 104 may range from 1.4 to 1.6, and the refractive index of the lens structure 103 may range from 1.65 to 1.85. The material of the planar structure layer 104 may be an organic polymer material doped with a photosensitizer. The material of the lens structure 103 may be organic polymer matrix doped zirconia or titania nanoparticles, and a photosensitizer.

As can be seen with reference to fig. 6 and 8, the plurality of different color sub-pixels 102 may further include a third color sub-pixel 102 c. The brightness decay rate of the first color sub-pixel 102a is greater than the brightness decay rate of the third color sub-pixel 102 c. The orthographic projection of the plurality of lens structures 103 on the substrate 101 does not overlap with the orthographic projection of the light emitting region of the third color sub-pixel 102c on the substrate 101. That is, the light emitted from the third color sub-pixel 102c does not irradiate the lens structures 103, the plurality of lens structures 103 do not affect the light emitted from the third color sub-pixel 102c, the light emitted from the third color sub-pixel 102c can be emitted normally, and the brightness decay rate of the third color sub-pixel 102c is kept unchanged.

In general, the luminance of the blue sub-pixel decays faster, and the luminance of the red sub-pixel and the green sub-pixel decays slower, so the first color sub-pixel 102a to which the light emitted by the embodiment of the present application is converged may be the blue sub-pixel. In addition, the second color sub-pixel 102b may be one of a red sub-pixel and a green sub-pixel, and the third color sub-pixel 102c may be the other of the red sub-pixel and the green sub-pixel.

As a second alternative implementation, the luminance decay rate of the first color sub-pixel 102a is less than the luminance decay rate of the second color sub-pixel 102 b. In this case, the plurality of lens structures 103 may be configured to diverge the light emitted from the first color sub-pixel 102a and transmit the diverged light to the flat structure layer 104.

Therefore, the plurality of lens structures 103 diverge the light emitted from the first color sub-pixel 102a, so as to accelerate the brightness attenuation speed of the first color sub-pixel 102 a. Moreover, the plurality of lens structures 103 do not affect the light emitted by the second color sub-pixel 102b, the light emitted by the second color sub-pixel 102b can be emitted normally, and the brightness decay rate of the second color sub-pixel 102b remains unchanged. Further, the brightness decay rate of the first color sub-pixel 102a and the brightness decay rate of the second color sub-pixel 102b can be kept consistent as much as possible, so that the color cast of the display panel 10 under different viewing angles is avoided, and the display effect of the display panel 10 can be improved.

Alternatively, referring to fig. 10, the refractive index of the flat structure layer 104 is greater than that of the lens structure 103, and the lens structure 103 may be a convex lens. Of these, only the light-emitting region of each sub-pixel 102 is shown in fig. 10.

Fig. 11 is a partial structural view of the lens structure and the planar structure layer shown in fig. 10. Referring to fig. 11, in the case that the refractive index of the flat structure layer 104 is greater than the refractive index of the lens structure 103, and the lens structure 103 is a convex lens, when light emitted from the first color sub-pixel 102a is irradiated from the lens structure 103 to the flat structure layer 104, the light may be refracted in a direction away from the axis of the lens structure 103 at the interface between the lens structure 103 and the flat structure layer 104. Therefore, the effect of the lens structures 103 for diffusing the light emitted by the sub-pixel 102 of one color is achieved, and the brightness attenuation speed of the sub-pixel 102a of the first color is further increased.

Illustratively, the refractive index of the flat structure layer 104 may range from 1.65 to 1.85, and the refractive index of the lens structure 103 may range from 1.4 to 1.6. The material of the flat structure layer 104 may be organic polymer matrix doped zirconia or titania nanoparticles, and a photosensitizer. The material of the lens structure 103 may be an organic polymer material doped with a photosensitizer.

Alternatively, referring to fig. 12, the refractive index of the flat structure layer 104 is smaller than that of the lens structure 103, and the lens structure 103 may be a concave lens. Of these, only the light-emitting region of each sub-pixel 102 is shown in fig. 12.

Fig. 13 is a partial structural view of the lens structure and the planar structure layer shown in fig. 12. Referring to fig. 13, in the case that the refractive index of the flat structure layer 104 is smaller than the refractive index of the lens structure 103, and the lens structure 103 is a concave lens, when light emitted from the first color sub-pixel 102a is irradiated from the lens structure 103 to the flat structure layer 104, the light may be refracted in a direction away from the axis of the lens structure 103 at the interface between the lens structure 103 and the flat structure layer 104. Therefore, the effect of the plurality of lens structures 103 for diverging the light emitted by the first color sub-pixel 102a is achieved, and the brightness attenuation speed of the first color sub-pixel 102a is further increased.

As can be seen with reference to fig. 10 and 12, the plurality of different color sub-pixels 102 may further include a third color sub-pixel 102 c. Wherein the brightness decay rate of the third color sub-pixel 102c is less than the brightness decay rate of the second color sub-pixel 102 b. The orthographic projection of the plurality of lens structures 103 on the substrate 101 also overlaps with the orthographic projection of the light emitting region of the third color sub-pixel 102c on the substrate 101. That is, the light emitted from the third color sub-pixel 102c also irradiates the lens structure 103, and when the light emitted from the third color sub-pixel 102c irradiates the flat structure layer 104 from the lens structure 103, the light can be refracted in a direction away from the axis of the lens structure 103 at the interface between the lens structure 103 and the flat structure layer 104. Therefore, the effect of the plurality of lens structures 103 on diverging the light emitted by the third color sub-pixel 102c is achieved, and the brightness attenuation speed of the third color sub-pixel 102c is further increased.

For a specific principle of refraction of the light emitted by the third color sub-pixel 102c, reference may be made to the description related to refraction of the light emitted by the first color sub-pixel 102a in the second implementation manner, and details of the embodiment of the present application are not described herein again.

In general, the luminance of the blue sub-pixel decays faster, and the luminance of the red sub-pixel and the green sub-pixel decays slower, so the first color sub-pixel 102a where the emitted light is dispersed in the embodiment of the present application may be one of the red sub-pixel and the green sub-pixel. In addition, the second color sub-pixel 102b may be a blue sub-pixel, and the third color sub-pixel 102c may be the other one of a red sub-pixel and a green sub-pixel.

In the embodiment of the present application, one blue sub-pixel, one red sub-pixel and two green sub-pixels may constitute one pixel a. For example, two pixels a are shown in fig. 14, and the shape and size of the sub-pixels 102 of different colors in the pixels a may be different. In addition, the size d1 of each pixel a in the pixel row direction of the display panel 10 may be 129.2 micrometers (μm), and the sum d2 of the sizes of two pixels a adjacent in the pixel column direction of the display panel 10 in the pixel column direction may be 129.2 μm.

Fig. 15 is a schematic structural diagram of a substrate provided in an embodiment of the present application. Fig. 16 is a cross-sectional view along the AA direction of the base substrate shown in fig. 15. Referring to fig. 15 and 16, the base substrate 101 may have a flat display region 101a and a curved display region 101 b. For example, the base substrate 101 in fig. 15 and 16 has one flat display region 101a and two curved display regions 101b, and the two curved display regions 101b are located on both sides of the flat display region 101a, respectively.

Alternatively, the orthographic projection of the plurality of lens structures 103 on the substrate base plate 101 is located within the curved display area 101 b. That is, the orthographic projections of the plurality of lens structures 103 on the substrate base plate 101 are only located on the curved display area 101b, and are not located on the planar display area 101 a.

In general, the curved display region 101b is prone to color shift relative to the flat display region 101a, and therefore, the plurality of lens structures 103 are disposed in the curved display region 101b, so as to adjust the luminance decay rate of the first color sub-pixel 102a in the curved display region 101b, so that the luminance decay rates of the respective colors in the curved display region 101b are as uniform as possible, and reduce the color shift of the curved display region 101 b. In addition, since the orthographic projections of the lens structures 103 on the substrate base plate 101 are not located in the flat display area 101a, the lens structures 103 do not affect the light extraction effect of the sub-pixels 102 in the flat display area 101a, the original light emitting efficiency of the flat display area 101a can be effectively maintained, and no power loss is caused.

Alternatively, the display panel 10 may be a curved display panel. The curved display panel may be an edge display panel, a waterfall display panel, or a folding display panel. For the curved display panel, the color shift adjustment (e.g., setting the lens structure 103) for the curved display area 101b of the curved display panel can be performed in a targeted manner, while the normal design (e.g., not setting the lens structure 103) for the flat display area 101a of the curved display panel can be maintained.

Fig. 17 is a top view of a sub-pixel and a lens structure provided in an embodiment of the present application. As can be seen with reference to fig. 17, the orthographic projections of the plurality of lens structures 103 on the substrate base 101 overlap with the orthographic projections of the non-light emitting areas of the plurality of sub-pixels 102 located in the curved display area 101b on the substrate base 101. Here, the non-light emitting regions of the plurality of sub-pixels 102 may refer to gap regions between the light emitting regions b of the plurality of sub-pixels 102.

For the convenience of manufacturing, the non-light emitting region of the sub-pixel 102 may also have the lens structure 103, and the lens structure 103 does not affect the light output of the sub-pixel 102 and the brightness decay rate of the sub-pixel 102.

Fig. 18 is a top view of another sub-pixel and lens structure provided in an embodiment of the present application. As can be seen from fig. 17 and 18, the number of lens structures 103 located in the light-emitting region b of the sub-pixel 102 in fig. 17 is larger, and the number of lens structures 103 located in the light-emitting region b of the sub-pixel 102 in fig. 18 is smaller.

Alternatively, the number of the lens structures 103 located in the light emitting region b of the sub-pixel 102 may range from 5 to 20.

In addition, when the size of the light emitting region b of the sub-pixel 102 is constant, the distribution density of the lens structures 103 is positively correlated with the number of the lens structures 103 located in the light emitting region b of the sub-pixel 102. That is, the distribution density of the lens structures 103 is large in fig. 17, and the distribution density of the lens structures 103 is small in fig. 18.

Alternatively, the degree of the angle change of the lens structures 103 to the light rays is positively correlated with the distribution density of the lens structures 103 in the display panel 10. That is, the greater the distribution density of the lens structures 103, the greater the degree of change of the angle of the lens structures 103 to the light rays; the smaller the distribution density of the lens structures 103, the smaller the degree of change of the angle of the lens structures 103 to the light rays. The degree of change of the angle of the light rays by the lens can be used for representing the size of the refraction angle of the light rays.

In the embodiment of the present application, the distribution density of the lens structures 103 may be related to the distance between two adjacent lens structures 103. For example, the smaller the distance between two adjacent lens structures 103, the greater the distribution density of the lens structures 103; the larger the distance between two adjacent lens structures 103, the smaller the distribution density of the lens structures 103.

Alternatively, the distance between two adjacent lens structures 103 may range from 0 μm to 4 μm. For example, in fig. 19, in the case where the distance between two adjacent lens structures 103 is 0 μm, the two adjacent lens structures 103 are in direct contact. Of course, referring to fig. 20, there may be a certain distance between two adjacent lens structures 103.

In the embodiment of the present application, the distance range between two adjacent lens structures 103 may be determined based on the simulation result of the display effect of the display panel 10. For example, a plurality of test display panels may be prepared, and the distances between two adjacent lens structures in each test display panel are different, and at least one target test display panel is determined by simulating the display effect of each test display panel. The display effect of each target test display panel is higher than that of the other test display panels. Thus, the distance range between two adjacent lenticular structures 103 in the display panel 10 may be determined based on the distance between two adjacent lenticular structures in the at least one target test display panel.

Referring to fig. 21, a side of the lens structure 103 away from the substrate base 101 may be a completely arc surface. Of course, referring to fig. 22, the surface of the lens structure 103 away from the substrate 101 is only partially a curved surface, and the other part is a flat surface. The shape of the lens structure 103 is not limited in the embodiments of the present application. The curvature of the lens structure 103 away from the curved surface of the base substrate 101 may be varied, for example, the curvature of the lens structure 103 away from the curved surface of the base substrate 101 shown in fig. 22 and the curvature of the lens structure 103 away from the curved surface of the base substrate 101 shown in fig. 23.

In the embodiment of the present application, referring to fig. 17 and 18, the shape of the orthographic projection of the lens structure 103 on the substrate base plate 101 may be circular. Of course, the shape of the orthographic projection of the lens structure 103 on the substrate 101 may be other shapes, which is not limited in this embodiment of the application.

Alternatively, in the case where the lens structure 103 is a convex lens, and the orthographic projection of the lens structure 103 on the substrate base plate 101 is a circle, referring to fig. 24, the diameter h1 of the lens structure 103 may range from 2 μm to 6 μm, and the vault height h2 may range from 1.5 μm to 4 μm. The thickness h3 of the planar structure layer 104 may be slightly higher than the arch height h2 of the lens structure 103, for example, the thickness h3 of the planar structure layer 104 ranges from 5 μm to 6 μm.

For example, fig. 25 is a schematic electron microscope diagram of a lens structure provided in an embodiment of the present application. Therein, two lens structures 103 are shown in fig. 25, wherein the diameter h1 of the first lens structure 103 may be 2.98 μm, the diameter h1 of the second lens structure 103 may be 3.07 μm, and the vault height h2 may be 1.56 μm. Also, the distance between the two lens structures 103 may be 1.97 μm.

Alternatively, in the case where the lens structure 103 is a concave lens and the orthographic projection of the lens structure 103 on the base substrate 101 is in the shape of a circle, referring to fig. 26, the diameter g1 of the lens structure 103 may range from μm to 6 μm, the groove depth g2 may range from 1.5 μm to 4 μm, and the height g3 may range from 1.9 μm to 5 μm. The thickness h3 of the planar structure layer 104 may be slightly higher than the height h3 of the lens structure 103, for example, the thickness g4 of the planar structure layer 104 is in the range of 5 μm to 6 μm.

For example, fig. 27 is a schematic electron microscope view of another lens structure provided in the embodiment of the present application. Therein, two lens structures 103 are shown in fig. 27, wherein the diameter h1 of the first lens structure 103 may be 2.98 μm, the diameter h1 of the second lens structure 103 may be 3.07 μm, and the vault height h2 may be 1.56 μm. Also, the distance between the two lens structures 103 may be 1.97 μm.

In the embodiment of the present application, the size range of each size of the lens structure 103 may be determined based on the simulation result of the display effect of the display panel 10. For example, a plurality of test display panels may be prepared, and the sizes of the lens structures in the test display panels are different, and at least one target test display panel is determined by simulating the display effect of each test display panel. The display effect of each target test display panel is higher than that of the other test display panels. Thus, the size of the lenticular structure 103 in the display panel 10 may be determined based on the size of the lenticular structure in the at least one target test display panel.

Referring to fig. 28, the display panel 10 may further include: a thin-film encapsulation (TFE) layer 105. The encapsulation film layer 105 may be located between the plurality of sub-pixels 102 and the plurality of lens structures 103 for encapsulating the plurality of sub-pixels 102.

The side of the encapsulation film layer 105 away from the plurality of sub-pixels 102 may be a plane. Therefore, the plurality of lens structures 103 can be formed on a plane, the preparation difficulty of the plurality of lens structures 103 is reduced, and the uniformity of the convergent light or divergent light of the plurality of lens structures 103 is improved.

Fig. 29 is a schematic electron microscope diagram after an encapsulation film layer is prepared according to an embodiment of the present disclosure. Fig. 30 is a schematic view of an electron microscope after a plurality of lens structures are prepared according to an embodiment of the present application. As can be seen from fig. 29 and fig. 30, in order to determine the influence of the lens structures 103 on the luminance decay rates of the sub-pixels 102 of different colors, the orthographic projections of the plurality of lens structures 103 on the substrate base plate 101 may be located at the light emitting regions b of the respective sub-pixels 102. That is, the lens structure 103 is disposed on the light emitting region b of the sub-pixel 102 of each color in the display panel 10.

In testing the influence of the lens structure 103 on the luminance decay rates of the sub-pixels 102 of different colors, the sub-pixels 102 may be individually turned on in a plurality of times, and the color of light emitted by all the sub-pixels 102 turned on at each time is the same. Therefore, the effect of the lens structure 103 on the brightness decay rate of the sub-pixel 102 of each color can be tested, and the effect of arranging the lens structure 103 in the light emitting region of the sub-pixel 102 of which color is determined is better.

In addition, in the testing process, a plurality of test display panels do not need to be prepared, so that the lens structures 103 in the test display panels are arranged on the sub-pixels 102 with different colors, and only one test display panel with one result can be prepared, thereby reducing the testing cost.

As can be seen with reference to fig. 28, the encapsulation film layer 105 may include: a first inorganic material layer 1051, an organic material layer 1052, and a second inorganic material layer 1053 stacked in this order along a side away from the base substrate 101.

Alternatively, the first inorganic material layer 1051 and the second inorganic material layer 1053 may be made of one or more inorganic oxides such as silicon nitride (SiNx), silicon oxide (SiOx), and silicon oxynitride (SiOxNy). The organic material layer 1052 may be made of a resin material. The resin may be a thermoplastic resin or a thermoplastic resin, the thermoplastic resin may include acryl (PMMA) resin, and the thermosetting resin may include epoxy resin.

In the embodiment of the present application, the organic material layer 1052 may be manufactured by an Ink Jet Printing (IJP) method. The first inorganic material layer 1051 and the second inorganic material layer 1053 can be formed by Chemical Vapor Deposition (CVD).

Referring to fig. 28, each sub-pixel 102 may include: an anode layer 1021, a light-emitting layer 1022, and a cathode layer 1023 are stacked in this order in a direction away from the substrate 101. The display panel 10 further includes: a pixel defining layer 106. The pixel defining layer 106 may be located between the anode layer 1021 and the light emitting layer 1022, and the pixel defining layer 106 may have a plurality of hollow areas. Each of the hollow areas is used to expose the anode layer 1021 of one of the sub-pixels 102, so that the anode layer 1021 of the sub-pixel 102 is in contact with the light emitting layer 1022 of the sub-pixel 102.

As can also be seen with reference to fig. 28, the display panel 10 may further include a module layer 107. The module layer 107 may be located on a side of the planar structure layer 104 away from the substrate base 101. The module layer 107 may include a polarizer, a cover, and the like.

In the embodiment of the present application, in order to embody the display effect of the display panel 10 in the embodiment of the present application, the luminance decay rate and the chromaticity of the white light commonly displayed by the sub-pixels 102 of the various colors in the display panel 10 may be tested.

Optionally, the white light luminance decay speed of the display panel in the prior art and the white light luminance decay speed of the display panel in which the lens structure 103 is a convex lens or a concave lens in the above-mentioned first implementation manner (embodiment one) of the embodiment of the present application are tested, so as to obtain fig. 31. Referring to fig. 31, it can be seen that the white light luminance decay rate of the display panel in which the lens structure 103 is a concave lens is slow compared to the white light luminance decay rate of the display panel in which the lens structure 103 is a convex lens. In addition, no matter the lens structure 103 in the display panel of the embodiment of the present application is a convex lens or a concave lens, the white light luminance attenuation speed is slow compared to the white light luminance attenuation speed of the display panel in the prior art. That is, the display panel 10 provided in the embodiment of the present application has a better display effect than the display panel of the related art.

Optionally, the chromaticity of white light of a display panel in the prior art and the chromaticity of white light of a display panel in which the lens structure 103 is a convex lens or a concave lens in the above first implementation manner of the embodiment of the present application are tested, so as to obtain fig. 32. As can be seen with reference to fig. 32, the chromaticity of the white light of the display panel in which the lens structure 103 is a concave lens is cyan relative to the chromaticity of the white light of the display panel in which the lens structure 103 is a convex lens. In addition, no matter the lens structure 103 in the display panel of the embodiment of the present application is a convex lens or a concave lens, the chromaticity of the white light is more green than that of the white light of the display panel in the prior art.

For the display panel 10 displaying yellow, the display bluish is not easily perceived by human eyes, so that the chromaticity of the white light of the display panel provided by the embodiment of the application is more bluish, which is more effective than the chromaticity of the white light of the display panel in the prior art.

Optionally, the white light luminance decay speed of the display panel in the prior art and the white light luminance decay speed of the display panel in which the lens structure 103 is a convex lens in the second implementation manner (example two) of the embodiment of the present application are tested, so as to obtain fig. 33. Referring to fig. 33, it can be seen that the white light luminance attenuation speed of the display panel with the lens structure 103 being a convex lens is slow compared to that of the display panel in the prior art. That is, the display panel 10 provided in the embodiment of the present application has a better display effect than the display panel of the related art.

Optionally, the chromaticity of white light of a display panel in the prior art and the chromaticity of white light of a display panel in which the lens structure 103 is a convex lens in the second implementation manner in the embodiment of the present application are tested, so as to obtain fig. 34. Referring to fig. 34, it can be seen that the chromaticity of the white light of the display panel in which the lens structure 103 is a convex lens is relatively green with respect to the chromaticity of the white light of the display panel in the related art.

In addition, as for the chromaticity of white light of the display panel in the prior art, the chromaticity of white light of the display panel in which the lens structure 103 is a convex lens in the first implementation manner of the embodiment of the present application, and the chromaticity of white light of the display panel in which the lens structure 103 is a convex lens in the second implementation manner of the embodiment of the present application are tested, and fig. 35 is obtained. Referring to fig. 35, it can be seen that the chromaticity of the white light of the display panel in the second embodiment is relatively cyan with respect to the chromaticity of the white light of the display panel in the first embodiment. The chromaticity of the white light of the display panels in the first and second embodiments is cyan with respect to the chromaticity of the white light of the display panel in the related art.

Among them, the curved trajectories in fig. 32, and fig. 34 to 35 may be CIE trajectories, which may be used to represent the color shift trajectories in the color gamut diagram when the display panel in the embodiment of the present application displays a white picture. The abscissa CIE _ X and the ordinate CIE _ Y thereof respectively represent the chromaticity values.

The display panel in the embodiment of the application can effectively solve the problem of color cast of the display panel on the premise of not changing the structure of the existing sub-pixel, and provides a larger adjustment space for the material selection of each film layer in the sub-pixel and the design of the film layer thickness. In addition, the display panel in the embodiment of the application can be a waterfall display panel or a folding display panel, so that the edge display area of the waterfall display panel and the bending display area of the folding display panel can be adjusted in a targeted manner, and the display panel is flexible and changeable and has great application and mass production values.

Fig. 36 is a schematic structural diagram of a display device according to an embodiment of the present application. As can be seen with reference to fig. 36, the display device may include the power supply assembly 20 and a display panel. The display panel may be the display panel 10 provided in the above embodiments. The power supply assembly 20 may be connected with the display panel 10 for supplying power to the display panel 10.

Optionally, the display device may be an OLED display device, a quantum dot light emitting diode (QLED) display device, electronic paper, a mobile phone, a tablet computer, a television, a display, a notebook computer, a digital photo frame, a navigator, or any product or component with a display function and a fingerprint identification function.

It is noted that in the drawings, the sizes of layers and regions may be exaggerated for clarity of illustration. Also, it will be understood that when an element or layer is referred to as being "on" another element or layer, it can be directly on the other element or layer or intervening layers may also be present. In addition, it will be understood that when an element or layer is referred to as being "under" another element or layer, it can be directly under the other element or intervening layers or elements may also be present. In addition, it will also be understood that when a layer or element is referred to as being "between" two layers or elements, it can be the only layer between the two layers or elements, or more than one intermediate layer or element may also be present. Like reference numerals refer to like elements throughout.

In this application, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance. The term "plurality" means two or more unless expressly limited otherwise.

The above description is only exemplary of the present application and should not be taken as limiting, as any modification, equivalent replacement, or improvement made within the spirit and principle of the present application should be included in the protection scope of the present application.

Claims

1. A display panel, comprising:

a base substrate (101);

a plurality of different color sub-pixels (102), the plurality of different color sub-pixels (102) being located on one side of the substrate base plate (101);

a plurality of lens structures (103), the plurality of lens structures (103) being located on a side of the plurality of different-color sub-pixels (102) away from the substrate base plate (101), orthographic projections of the plurality of lens structures (103) on the substrate base plate (101) overlapping orthographic projections of light-emitting areas of first-color sub-pixels (102a) of the plurality of different-color sub-pixels (102) on the substrate base plate (101) and non-overlapping orthographic projections of light-emitting areas of second-color sub-pixels (102b) of the plurality of different-color sub-pixels (102) on the substrate base plate (101);

and the flat structure layer (104), the flat structure layer (104) is positioned on one side of the plurality of lens structures (103) far away from the substrate base plate (101), and the refractive index of the flat structure layer (104) is different from that of the lens structures (103).

2. The display panel according to claim 1, wherein the luminance decay rate of the first color sub-pixel (102a) is greater than the luminance decay rate of the second color sub-pixel (102 b);

the plurality of lens structures (103) are used for converging the light emitted by the first color sub-pixel (102a) and transmitting the converged light to the flat structure layer (104).

3. A display panel as claimed in claim 2 characterized in that the refractive index of the flat structured layer (104) is larger than the refractive index of the lenticular structure (103), the lenticular structure (103) being a concave lens.

4. A display panel as claimed in claim 2 characterized in that the refractive index of the flat structured layer (104) is smaller than the refractive index of the lenticular structure (103), the lenticular structure (103) being a convex lens.

5. The display panel according to claim 2, wherein the plurality of different color sub-pixels (102) further comprises a third color sub-pixel (102c), and an orthographic projection of the plurality of lens structures (103) on the substrate base plate (101) does not overlap with an orthographic projection of a light emitting area of the third color sub-pixel (102c) on the substrate base plate (101);

wherein the first color sub-pixel (102a) is a blue sub-pixel, the second color sub-pixel (102b) is one of a red sub-pixel and a green sub-pixel, and the third color sub-pixel (102c) is the other of the red sub-pixel and the green sub-pixel.

6. The display panel according to claim 1, wherein the luminance decay rate of the second color sub-pixel (102c) is greater than the luminance decay rate of the first color sub-pixel (101 a);

the lens structures (103) are used for diverging the light rays emitted by the first color sub-pixel (102a) and transmitting the diverged light rays to the flat structure layer (104).

7. The display panel according to claim 6, wherein the refractive index of the flat structure layer (104) is larger than the refractive index of the lenticular structure (103), and the lenticular structure (103) is a convex lens.

8. The display panel according to claim 6, wherein the refractive index of the flat structure layer (104) is smaller than the refractive index of the lens structure (103), and the lens structure (103) is a concave lens.

9. The display panel according to claim 6, wherein the plurality of sub-pixels (102) of different colors further comprises a sub-pixel (102c) of a third color, and an orthographic projection of the plurality of lens structures (103) on the substrate base plate (101) also overlaps with an orthographic projection of a light emitting area of the sub-pixel (102c) of the third color on the substrate base plate (101);

wherein the first color sub-pixel (102a) is one of a red sub-pixel and a green sub-pixel, the second color sub-pixel (102b) is a blue sub-pixel, and the third sub-pixel (102c) is the other of the red sub-pixel and the green sub-pixel.

10. The display panel according to any one of claims 1 to 9, wherein the substrate base plate (101) has a flat display area (101a) and a curved display area (101 b); the orthographic projections of the plurality of lens structures (103) on the substrate base plate (101) are positioned in the curved surface display area (101 b).

11. The display panel according to claim 10, wherein an orthographic projection of the plurality of lens structures (103) on a substrate base plate (101) overlaps with an orthographic projection of a non-light emitting area of the plurality of sub-pixels (102) located in the curved display area (101b) on the substrate base plate (101).

12. The display panel according to any one of claims 1 to 9, characterized by further comprising: an encapsulation film layer (105);

the packaging film layer (105) is located between the plurality of sub-pixels (102) and the plurality of lens structures (103) and is used for packaging the plurality of sub-pixels (102), and one surface, away from the plurality of sub-pixels (102), of the packaging film layer (105) is a plane.

13. The display panel according to claim 12, wherein the encapsulation film layer (105) comprises: a first inorganic material layer (1051), an organic material layer (1052), and a second inorganic material layer (1053) which are sequentially stacked along a side away from the base substrate (101).

14. A display panel as claimed in any one of claims 1 to 9 characterized in that each of the sub-pixels (102) comprises: an anode layer (1021), a light-emitting layer (1022), and a cathode layer (1023) which are sequentially stacked in a direction away from the base substrate (101); the display panel further includes: a pixel defining layer (106);

the pixel defining layer (106) is located between the anode layer (1021) and the light emitting layer (1022), and the pixel defining layer (106) has a plurality of hollowed-out areas, each hollowed-out area is used for exposing the anode layer (1021) of one sub-pixel (102).

15. A display device, characterized in that the display device comprises: -a power supply assembly (20), and-a display panel (10) according to any one of claims 1 to 14;

the power supply assembly (20) is connected with the display panel (10) and used for supplying power to the display panel (10).