Display panel and display device

Abstract

The present application discloses a display panel and a display device, and relates to the field of display technology. Based on the magnitude relationship between the brightness decay rate of a first color sub-pixel (102a) and the brightness decay rate of a second color sub-pixel (102b) in the display panel (10), the magnitude relationship between the refractive index of a flat structure layer (104) and the refractive index of a lens structure (103) in the display panel (10) is determined, thereby making the brightness decay rate of the first color sub-pixel (102a) and the brightness decay rate of the second color sub-pixel (102b) as consistent as possible, thereby improving the display effect of the display panel (10).

Description

Technical Field

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

[0002] An organic light emitting diode (OLED) display panel generally includes a plurality of OLED pixels, and each OLED pixel includes a plurality of sub-pixels of different colors.

[0003] In related technologies, sub-pixels of different colors emit light of different wavelengths, and the shapes and sizes of their luminous areas vary. Consequently, as the viewing angle increases, the brightness of the sub-pixels of different colors decays at different rates, resulting in poor display quality on the display panel. Summary of the Invention

[0004] This application provides a display panel and a display device that can solve the problem of poor display effects of display panels in related technologies. The technical solution is as follows:

[0005] In one aspect, a display panel is provided, comprising:

[0006] substrate;

[0007] a plurality of sub-pixels of different colors, wherein the plurality of sub-pixels of different colors are located on one side of the base substrate;

[0008] a plurality of lens structures, the plurality of lens structures being located on a side of the plurality of sub-pixels of different colors away from the base substrate, wherein orthographic projections of the plurality of lens structures on the base substrate overlap with orthographic projections of light-emitting regions of first-color sub-pixels among the plurality of sub-pixels of different colors on the base substrate, and do not overlap with orthographic projections of light-emitting regions of second-color sub-pixels among the plurality of sub-pixels of different colors on the base substrate;

[0009] and a flat structure layer, wherein the flat structure layer is located on a side of the plurality of lens structures away from the base substrate, and a refractive index of the flat structure layer is different from a refractive index of the lens structures.

[0010] Optionally, the brightness decay rate of the first color sub-pixel is greater than the brightness decay rate of the second color sub-pixel;

[0011] The multiple lens structures are used to converge the light emitted by the first color sub-pixel and transmit the converged light to the flat structure layer.

[0012] Optionally, the refractive index of the flat structure layer is greater than the refractive index of the lens structure, and the lens structure is a concave lens.

[0013] Optionally, the refractive index of the flat structure layer is smaller than the refractive index of the lens structure, and the lens structure is a convex lens.

[0014] Optionally, the multiple sub-pixels of different colors further include a third color sub-pixel, and the orthographic projections of the multiple lens structures on the base substrate do not overlap with the orthographic projections of the light-emitting areas of the third color sub-pixels on the base substrate;

[0015] 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 a red sub-pixel and a green sub-pixel.

[0016] Optionally, the brightness decay rate of the second color sub-pixel is greater than the brightness decay rate of the first color sub-pixel;

[0017] The multiple lens structures are used to diverge the light emitted by the first color sub-pixel and transmit the diverged light to the planar structure layer.

[0018] Optionally, the refractive index of the flat structure layer is greater than the refractive index of the lens structure, and the lens structure is a convex lens.

[0019] Optionally, the refractive index of the flat structure layer is smaller than the refractive index of the lens structure, and the lens structure is a concave lens.

[0020] Optionally, the multiple sub-pixels of different colors further include a third color sub-pixel, and the orthographic projections of the multiple lens structures on the base substrate also overlap with the orthographic projections of the light-emitting areas of the third color sub-pixels on the base substrate;

[0021] 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 color sub-pixel is the other of a red sub-pixel and a green sub-pixel.

[0022] Optionally, the base substrate has a planar display area and a curved display area; and the orthographic projections of the multiple lens structures on the base substrate are located within the curved display area.

[0023] Optionally, the orthographic projections of the multiple lens structures on the base substrate overlap with the orthographic projections of the non-luminous areas of the multiple sub-pixels located in the curved display area on the base substrate.

[0024] Optionally, the display panel further includes: an encapsulation film layer;

[0025] The packaging film layer is located between the multiple sub-pixels and the multiple lens structures, and is used to encapsulate the multiple sub-pixels. A surface of the packaging film layer away from the multiple sub-pixels is a plane.

[0026] Optionally, the encapsulation film layer includes: a first inorganic material layer, an organic material layer, and a second inorganic material layer stacked in sequence along a side away from the base substrate.

[0027] Optionally, each of the sub-pixels includes: an anode layer, a light-emitting layer, and a cathode layer stacked in sequence in a direction away from the base substrate; the display panel further includes: a pixel defining layer;

[0028] The pixel defining layer is located between the anode layer and the light emitting layer, and the pixel defining layer has a plurality of hollow regions, each of which is used to expose the anode layer of one sub-pixel.

[0029] On the other hand, a display device is provided, comprising: a power supply component, and the display panel according to the above aspect;

[0030] The power supply component is connected to the display panel and is used to supply power to the display panel.

[0031] The beneficial effects of the technical solution provided by this application include at least:

[0032] The present application provides a display panel and a display device. Based on the magnitude relationship between the brightness decay rate of a first color sub-pixel and the brightness decay rate of a second color sub-pixel in the display panel, the magnitude relationship between the refractive index of a flat structure layer and the refractive index of a lens structure in the display panel is determined, thereby making the brightness decay rate of the first color sub-pixel and the brightness decay rate of the second color sub-pixel as consistent as possible, thereby improving the display effect of the display panel. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0034] Figure 1 is a graph of spectral tristimulus values provided in an embodiment of the present application;

[0035] Figure 2 Schematic diagram of viewing angle and brightness provided in an embodiment of the present application;

[0036] Figure 3This is a schematic diagram of the display effect of a display panel in the related art;

[0037] Figure 4 yes Figure 3 A partial schematic diagram of

[0038] Figure 5 is a structural diagram of a display panel provided in an embodiment of the present application;

[0039] Figure 6 is a structural diagram of another display panel provided in an embodiment of the present application;

[0040] Figure 7 yes Figure 6 Schematic diagram of the local structure of the lens structure and the flat structure layer shown;

[0041] Figure 8 This is a schematic structural diagram of another display panel provided in an embodiment of the present application;

[0042] Figure 9 yes Figure 8 Schematic diagram of the local structure of the lens structure and the flat structure layer shown;

[0043] Figure 10 is a structural diagram of another display panel provided in an embodiment of the present application;

[0044] Figure 11 yes Figure 10 Schematic diagram of the local structure of the lens structure and the flat structure layer shown;

[0045] Figure 12 is a structural diagram of another display panel provided in an embodiment of the present application;

[0046] Figure 13 yes Figure 12 Schematic diagram of the local structure of the lens structure and the flat structure layer shown;

[0047] Figure 14 This is a schematic structural diagram of a pixel provided in an embodiment of the present application;

[0048] Figure 15 This is a schematic structural diagram of a substrate provided in an embodiment of the present application;

[0049] Figure 16 yes Figure 15 A cross-sectional view of the substrate along the AA direction is shown;

[0050] Figure 17 is a top view of a sub-pixel and lens structure provided in an embodiment of the present application;

[0051] Figure 18is a top view of another sub-pixel and lens structure provided in an embodiment of the present application;

[0052] Figure 19 is a schematic diagram of a lens structure and a flat structure layer provided in an embodiment of the present application;

[0053] Figure 20 is a schematic diagram of another lens structure and a flat structure layer provided in an embodiment of the present application;

[0054] Figure 21 is a schematic diagram of another lens structure and a flat structure layer provided in an embodiment of the present application;

[0055] Figure 22 is a schematic diagram of another lens structure and a flat structure layer provided in an embodiment of the present application;

[0056] Figure 23 is a schematic diagram of another lens structure and a flat structure layer provided in an embodiment of the present application;

[0057] Figure 24 is a schematic diagram of another lens structure and a flat structure layer provided in an embodiment of the present application;

[0058] Figure 25 This is a schematic diagram of an electron microscope lens structure provided in an embodiment of the present application;

[0059] Figure 26 is a schematic diagram of another lens structure and a flat structure layer provided in an embodiment of the present application;

[0060] Figure 27 This is a schematic diagram of an electron microscope with another lens structure provided in an embodiment of the present application;

[0061] Figure 28 is a structural diagram of another display panel provided in an embodiment of the present application;

[0062] Figure 29 This is an electron microscope schematic diagram after preparing a packaging film layer provided in an embodiment of the present application;

[0063] Figure 30 This is a schematic diagram of an electron microscope after preparing multiple lens structures provided in an embodiment of the present application;

[0064] Figure 31 is a schematic diagram of another viewing angle and brightness provided in an embodiment of the present application;

[0065] Figure 32 This is a chromaticity diagram provided in an embodiment of the present application;

[0066] Figure 33 This is another schematic diagram of viewing angle and brightness provided in an embodiment of the present application;

[0067] Figure 34 is another chromaticity diagram provided in an embodiment of the present application;

[0068] Figure 35 This is another chromaticity diagram provided in an embodiment of the present application;

[0069] Figure 36 It is a structural schematic diagram of a display device provided in an embodiment of the present application. DETAILED DESCRIPTION

[0070] In order to make the objectives, technical solutions and advantages of this application clearer, the implementation methods of this application will be further described in detail below with reference to the accompanying drawings.

[0071] Organic light-emitting diodes (OLEDs) have the advantages of wide viewing angle, high contrast, fast response, high brightness, low driving voltage and flexibility, and have been widely used in display panels such as mobile phones, tablets, televisions and cars.

[0072] To make OLED display panels suitable for a variety of applications, they are made flexible and used in products such as foldable and curved screens. However, because white light in OLED display panels is a mixture of red, green, and blue light, the resulting white light will exhibit color shift when the brightness and hue of these three colors decay at different rates depending on the viewing angle. Figure 1 This is a graph of spectral tristimulus values provided in an embodiment of the present application, where the horizontal axis represents wavelength (in nanometers), and the vertical axis represents intensity. Furthermore, as known from colorimetry, the brightness information of light is primarily related to the Y stimulus value of the spectral tristimulus values (X stimulus value, Y stimulus value, and Z stimulus value).

[0073] refer to Figure 2 It can be seen that the luminance decay (L-Decay) rate of blue light is faster, while the luminance decay rate of red and green light is slower. Figure 3 and Figure 4 In the curved display area 101b of products such as foldable display panels and curved display panels, the color displayed by the display panel will turn yellow (produce color cast), affecting its display effect.

[0074] Figure 2In , the horizontal axis can be the viewing angle, the unit can be degree (°), and the vertical axis is the brightness. The viewing angle can be the angle between the viewing direction of the human eye and the normal of the light-emitting surface of the display panel. Assume that a straight line perpendicular to the display panel is taken as the reference line, and the plane passing through the reference line and parallel to the pixel row direction in the display panel is taken as the reference plane. In the reference plane, the clockwise rotation direction of the reference line is the positive direction of the viewing angle, and the counterclockwise rotation direction is the negative direction of the viewing angle. For example, Figure 2 The viewing angle range shown in is -100° to 100°.

[0075] In related art, the color shift problem of a display panel is improved by adjusting the microcavity length of each color sub-pixel 102 to make the brightness decay rate of each color sub-pixel 102 consistent. The microcavity length can be used to represent the total thickness of the film layer between the anode layer 1021 and the cathode layer 1023 of the sub-pixel 102. However, this solution in related art will affect the color gamut of the display panel to a certain extent, and it will also affect the luminous performance of the OLED.

[0076] Figure 5 Schematic diagram of the structure of a display panel provided by an embodiment of the present application. Figure 5 The display panel 10 may include: a base substrate 101 , a plurality of sub-pixels 102 of different colors, a plurality of lens structures 103 and a flat structure layer 104 . Figure 1 Only two sub-pixels 102 and one lens structure 103 are shown.

[0077] The plurality of sub-pixels 102 of different colors are located on one side of the base substrate 101, the plurality of lens structures 103 are located on a side of the plurality of sub-pixels 102 of different colors away from the base substrate 101, and the planar structure layer 104 is located on a side of the plurality of lens structures 103 away from the base substrate 101. In other words, the plurality of sub-pixels 102 of different colors, the plurality of lens structures 103, and the planar structure layer 104 can be stacked sequentially in a direction away from the base substrate 101.

[0078] refer to Figure 1 The orthographic projections of the multiple lens structures 103 on the base substrate 101 overlap with the orthographic projections of the light-emitting regions of the first color sub-pixel 102a among the multiple sub-pixels 102 of different colors on the base substrate 101. Furthermore, the orthographic projections of the multiple lens structures 103 on the base substrate 101 do not overlap with the orthographic projections of the light-emitting regions of the second color sub-pixel 102b among the multiple sub-pixels 102 of different colors on the base substrate 101.

[0079] 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. Therefore, when the light emitted by the sub-pixel 102 in the display panel 10 is irradiated from the lens structure 103 to the flat structure layer 104, the light may be refracted at the interface between the lens structure 103 and the flat structure layer 104. Optionally, the light may be refracted in a direction close to the axis of the lens structure 103 (light convergence) or refracted in a direction away from the axis of the lens structure 103 (light divergence). 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.

[0080] Because the color of the light emitted by the first color sub-pixel 102a is different from the color of the light emitted by the second color sub-pixel 102b, the brightness decay rate of the first color sub-pixel 102a is different from the brightness decay rate of the second color sub-pixel 102b. The brightness decay rate can be used to indicate how much the brightness of the sub-pixel 102 decreases as the viewing angle increases.

[0081] Alternatively, 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 102b, in this case, when the viewing angle is large (for example, the viewing angle range is 45° to 60°), the brightness of the light emitted by the first color sub-pixel 102a will be lower than the brightness of the light emitted by the second color sub-pixel 102b at the same viewing angle, making it very easy to observe color shift on the screen, thereby resulting in poor display quality of the display panel 10.

[0082] Therefore, in the embodiment of the present application, by determining the relationship between the refractive index of the flat structure layer 104 and the refractive index of the lens structure 103, the light emitted by the first color sub-pixel 102a can be refracted toward the axis of the lens structure 103, thereby slowing down the brightness decay rate of the first color sub-pixel 102a. Furthermore, 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 as consistent as possible, thereby avoiding color shift in the display panel 10 at different viewing angles and improving the display quality of the display panel 10.

[0083] Of course, if the brightness decay rate of the first color sub-pixel 102a is slower than that of the second color sub-pixel 102b, in this case, when the viewing angle is large (for example, within a viewing angle range of 45° to 60°), the brightness of the light emitted by the first color sub-pixel 102a will be higher than the brightness of the light emitted by the second color sub-pixel 102b at the same viewing angle, and color shift will be easily observed on the screen, which will lead to poor display quality of the display panel 10.

[0084] Therefore, in the embodiment of the present application, by determining the relationship between the refractive index of the flat structure layer 104 and the refractive index of the lens structure 103, the light emitted by the first color sub-pixel 102a is refracted in a direction away from the axis of the lens structure 103, thereby accelerating the brightness decay rate of the first color sub-pixel 102a. Furthermore, 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 as consistent as possible, thereby avoiding color shift in the display panel 10 at different viewing angles and improving the display quality of the display panel 10.

[0085] In summary, the embodiments of the present application provide a display panel, which determines the relationship between the refractive index of the flat structure layer and the refractive index of the lens structure in the display panel based on the relationship between the brightness decay rate of the first color sub-pixel and the brightness decay rate of the second color sub-pixel in the display panel, thereby making the brightness decay rate of the first color sub-pixel and the brightness decay rate of the second color sub-pixel as consistent as possible, thereby improving the display effect of the display panel.

[0086] Optionally, 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.

[0087] As a first optional implementation, the brightness decay rate of the first color sub-pixel 102a is greater than the brightness decay rate of the second color sub-pixel 102b. In this case, the multiple lens structures 103 can be used to converge the light emitted by the first color sub-pixel 102a and transmit the converged light to the flat structure layer 104.

[0088] Because the orthographic projections of the multiple lens structures 103 on the base substrate 101 overlap with the orthographic projections of the light-emitting regions of the first-color sub-pixel 102a on the base substrate 101, light emitted by the first-color sub-pixel 102a can illuminate the multiple lens structures 103. Furthermore, the orthographic projections of the multiple lens structures 103 on the base substrate 101 do not overlap with the orthographic projections of the light-emitting regions of the second-color sub-pixel 102b on the base substrate 101, and therefore light emitted by the second-color sub-pixel 102b does not illuminate the multiple lens structures 103.

[0089] Thus, the multiple lens structures 103 converge the light emitted by the first color sub-pixel 102a, thereby slowing down the brightness decay rate of the first color sub-pixel 102a. Furthermore, the multiple lens structures 103 do not affect the light emitted by the second color sub-pixel 102b, allowing the light emitted by the second color sub-pixel 102b to be emitted normally, and the brightness decay rate of the second color sub-pixel 102b remains unchanged. Furthermore, 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 as consistent as possible, thereby avoiding color shift in the display panel 10 at different viewing angles, thereby improving the display quality of the display panel 10.

[0090] Optional, reference Figure 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. Figure 6 Only the light emitting area of each sub-pixel 102 is shown.

[0091] Figure 7 yes Figure 6 The schematic diagram of the local structure of the lens structure and the flat structure layer shown. Figure 7 When the refractive index of the flat structure layer 104 is greater than that of the lens structure 103, and the lens structure 103 is a concave lens, the light emitted by the first color sub-pixel 102a, when irradiated from the lens structure 103 to the flat structure layer 104, can be refracted at the interface between the lens structure 103 and the flat structure layer 104 in a direction close to the axis of the lens structure 103. In this way, the multiple lens structures 103 converge the light emitted by the first color sub-pixel 102a, thereby slowing down the brightness decay rate of the first color sub-pixel 102a.

[0092] For example, 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 an organic polymer matrix doped with zirconium oxide (ZrO) or titanium oxide (TiO) nanoparticles and a photosensitizer. The material of the lens structure 103 may be an organic polymer material doped with a photosensitizer.

[0093] Alternatively, refer to Figure 8 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 may be a convex lens. Figure 8 Only the light emitting area of each sub-pixel 102 is shown.

[0094] Figure 9 yes Figure 8 The schematic diagram of the local structure of the lens structure and the flat structure layer shown. Figure 9 When the refractive index of the flat structure layer 104 is lower than that of the lens structure 103, and the lens structure 103 is a convex lens, the light emitted by the first color sub-pixel 102a, when irradiated from the lens structure 103 to the flat structure layer 104, can be refracted at the interface between the lens structure 103 and the flat structure layer 104 in a direction closer to the axis of the lens structure 103. In this way, the multiple lens structures 103 converge the light emitted by the first color sub-pixel 102a, thereby slowing down the brightness decay rate of the first color sub-pixel 102a.

[0095] For example, 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 flat structure layer 104 may be an organic polymer material doped with a photosensitive agent. The material of the lens structure 103 may be an organic polymer matrix doped with zirconium oxide or titanium oxide nanoparticles and a photosensitive agent.

[0096] refer to Figure 6 and Figure 8 It can be seen that the multiple sub-pixels 102 of different colors can also include a third color sub-pixel 102c. Among them, the brightness decay rate of the first color sub-pixel 102a is greater than the brightness decay rate of the third color sub-pixel 102c. The orthographic projection of the multiple lens structures 103 on the base substrate 101 and the orthographic projection of the light-emitting area of the third color sub-pixel 102c on the base substrate 101 do not overlap. In other words, the light emitted by the third color sub-pixel 102c will not be irradiated by the lens structure 103, and the multiple lens structures 103 will not affect the light emitted by the third color sub-pixel 102c. The light emitted by the third color sub-pixel 102c can be emitted normally, and the brightness decay rate of the third color sub-pixel 102c remains unchanged.

[0097] Typically, the brightness of a blue sub-pixel decays faster, while the brightness of a red sub-pixel and a green sub-pixel decays slower. Therefore, in the embodiment of the present application, the first color sub-pixel 102a, from which the light is concentrated, may be a blue sub-pixel. Furthermore, the second color sub-pixel 102b may be either a red sub-pixel or a green sub-pixel, and the third color sub-pixel 102c may be the other of the red and green sub-pixels.

[0098] As a second optional implementation, the brightness decay rate of the first color sub-pixel 102a is slower than that of the second color sub-pixel 102b. In this case, the multiple lens structures 103 can be used to diverge the light emitted by the first color sub-pixel 102a and transmit the diverged light to the flat structure layer 104.

[0099] Because the orthographic projections of the multiple lens structures 103 on the base substrate 101 overlap with the orthographic projections of the light-emitting regions of the first-color sub-pixel 102a on the base substrate 101, light emitted by the first-color sub-pixel 102a can illuminate the multiple lens structures 103. Furthermore, the orthographic projections of the multiple lens structures 103 on the base substrate 101 do not overlap with the orthographic projections of the light-emitting regions of the second-color sub-pixel 102b on the base substrate 101, and therefore light emitted by the second-color sub-pixel 102b does not illuminate the multiple lens structures 103.

[0100] Thus, the multiple lens structures 103 diffuse the light emitted by the first color sub-pixel 102a, thereby accelerating the brightness decay rate of the first color sub-pixel 102a. Furthermore, the multiple lens structures 103 do not affect the light emitted by the second color sub-pixel 102b, allowing the light emitted by the second color sub-pixel 102b to be emitted normally, and the brightness decay rate of the second color sub-pixel 102b remains unchanged. Furthermore, 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 as consistent as possible, thereby avoiding color shift in the display panel 10 at different viewing angles and improving the display quality of the display panel 10.

[0101] Optional, reference Figure 10 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 convex lens. Figure 10 Only the light emitting area of each sub-pixel 102 is shown.

[0102] Figure 11 yes Figure 10 The schematic diagram of the local structure of the lens structure and the flat structure layer shown. Figure 11 When the refractive index of the flat structure layer 104 is greater than that of the lens structure 103, and the lens structure 103 is a convex lens, the light emitted by the first color sub-pixel 102a, when irradiated from the lens structure 103 to the flat structure layer 104, can be refracted at the interface between the lens structure 103 and the flat structure layer 104 in a direction away from the axis of the lens structure 103. In this way, the multiple lens structures 103 can disperse the light emitted by the one color sub-pixel 102, thereby accelerating the brightness decay rate of the first color sub-pixel 102a.

[0103] For example, 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 an organic polymer matrix doped with zirconium oxide or titanium oxide nanoparticles and a photosensitizer. The material of the lens structure 103 may be an organic polymer matrix doped with a photosensitizer.

[0104] Alternatively, refer to Figure 12 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 may be a concave lens. Figure 12 Only the light emitting area of each sub-pixel 102 is shown.

[0105] Figure 13 yes Figure 12 The schematic diagram of the local structure of the lens structure and the flat structure layer shown. Figure 13 When the refractive index of the flat structure layer 104 is lower than that of the lens structure 103, and the lens structure 103 is a concave lens, the light emitted by the first color sub-pixel 102a, when irradiated from the lens structure 103 to the flat structure layer 104, can be refracted at the interface between the lens structure 103 and the flat structure layer 104 in a direction away from the axis of the lens structure 103. In this way, the multiple lens structures 103 disperse the light emitted by the first color sub-pixel 102a, thereby accelerating the brightness decay rate of the first color sub-pixel 102a.

[0106] For example, 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 flat structure layer 104 may be an organic polymer material doped with a photosensitive agent. The material of the lens structure 103 may be an organic polymer matrix doped with zirconium oxide or titanium oxide nanoparticles and a photosensitive agent.

[0107] refer to Figure 10 and Figure 12 It can be seen that the multiple sub-pixels 102 of different colors may also include a third-color sub-pixel 102c. The brightness decay rate of the third-color sub-pixel 102c is slower than that of the second-color sub-pixel 102b. The orthographic projections of the multiple lens structures 103 on the base substrate 101 also overlap with the orthographic projections of the light-emitting areas of the third-color sub-pixel 102c on the base substrate 101. That is, the light emitted by the third-color sub-pixel 102c will also illuminate the lens structure 103. When the light emitted by the third-color sub-pixel 102c is irradiated from the lens structure 103 to the flat structure layer 104, the light may be refracted at the interface between the lens structure 103 and the flat structure layer 104 in a direction away from the axis of the lens structure 103. This achieves the effect of the multiple lens structures 103 dispersing the light emitted by the third-color sub-pixel 102c, thereby accelerating the brightness decay rate of the third-color sub-pixel 102c.

[0108] The specific principle of refraction of the light emitted by the third color sub-pixel 102c can be found in the relevant description of refraction of the light emitted by the first color sub-pixel 102a in the second implementation manner, and will not be repeated in this embodiment of the present application.

[0109] Typically, the brightness of a blue sub-pixel decays faster, while the brightness of a red sub-pixel and a green sub-pixel decays slower. Therefore, in the embodiment of the present application, the first color sub-pixel 102a from which the light is dispersed can be either a red sub-pixel or a green sub-pixel. Furthermore, the second color sub-pixel 102b can be a blue sub-pixel, and the third color sub-pixel 102c can be either a red sub-pixel or a green sub-pixel.

[0110] In the embodiment of the present application, one blue sub-pixel, one red sub-pixel and two green sub-pixels can constitute a pixel a. For example, Figure 14 Two pixels a are shown, and the shapes and sizes of the sub-pixels 102 of different colors in pixel a may be different. Furthermore, a dimension d1 of each pixel a along the pixel row direction of the display panel 10 may be 129.2 micrometers (μm), and a sum of the dimensions d2 of two adjacent pixels a along the pixel column direction of the display panel 10 may be 129.2 μm.

[0111] Figure 15 This is a structural schematic diagram of a substrate provided in an embodiment of the present application. Figure 16 yes Figure 15 The cross-sectional view of the substrate along the AA direction is shown. Figure 15 and Figure 16 The base substrate 101 may have a flat display area 101a and a curved display area 101b. For example, Figure 15 and Figure 16 The base substrate 101 has a flat display area 101 a and two curved display areas 101 b , and the two curved display areas 101 b are respectively located on both sides of the flat display area 101 a .

[0112] Optionally, the orthographic projections of the multiple lens structures 103 on the base substrate 101 are located in the curved display area 101b, that is, the orthographic projections of the multiple lens structures 103 on the base substrate 101 are only located in the curved display area 101b, but not in the flat display area 101a.

[0113] Typically, the curved display area 101b is more susceptible to color shift than the flat display area 101a. Therefore, multiple lens structures 103 are positioned within the curved display area 101b to adjust the brightness decay rate of the first color sub-pixels 102a within the curved display area 101b, ensuring that the brightness decay rates of the various colors within the curved display area 101b are as consistent as possible, thereby reducing color shift within the curved display area 101b. Furthermore, because the orthographic projections of the multiple lens structures 103 on the base substrate 101 are not located within the flat display area 101a, the multiple lens structures 103 do not affect the light output of the sub-pixels 102 within the flat display area 101a, effectively maintaining the original luminous efficiency of the flat display area 101a without causing power loss.

[0114] Optionally, 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 such a curved display panel, targeted color shift adjustment can be performed on the curved display area 101b of the curved display panel (e.g., by providing the lens structure 103), while the flat display area 101a of the curved display panel can maintain a normal design (e.g., without the lens structure 103).

[0115] Figure 17 This is a top view of a sub-pixel and lens structure provided by an embodiment of the present application. Figure 17 It can be seen that the orthographic projections of the multiple lens structures 103 on the base substrate 101 overlap with the orthographic projections of the non-luminescent regions of the multiple sub-pixels 102 located in the curved display area 101b on the base substrate 101. The non-luminescent regions of the multiple sub-pixels 102 may refer to the gaps between the luminescent regions b of the multiple sub-pixels 102.

[0116] For ease of manufacturing, a lens structure 103 may also be provided on the non-luminous region of the sub-pixel 102 , and the lens structure 103 will not affect the light emission of the sub-pixel 102 or the brightness decay rate of the sub-pixel 102 .

[0117] Figure 18 This is a top view of another sub-pixel and lens structure provided in an embodiment of the present application. Figure 17 and Figure 18 It can be seen that Figure 17 The number of lens structures 103 located in the light emitting region b of the sub-pixel 102 is relatively large. Figure 18 The number of lens structures 103 located in the light emitting region b of the sub-pixel 102 is relatively small.

[0118] Optionally, 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.

[0119] Furthermore, when the size of the light emitting area b of the sub-pixel 102 is constant, the distribution density of the lens structure 103 is positively correlated with the number of lens structures 103 located in the light emitting area b of the sub-pixel 102. That is, Figure 17 The distribution density of the middle lens structure 103 is relatively high. Figure 18 The distribution density of the middle lens structures 103 is relatively low.

[0120] Optionally, the degree to which the lens structure 103 changes the angle of light is positively correlated with the distribution density of the lens structure 103 in the display panel 10. That is, the greater the distribution density of the lens structure 103, the greater the degree to which the lens structure 103 changes the angle of light; and the smaller the distribution density of the lens structure 103, the smaller the degree to which the lens structure 103 changes the angle of light. The degree to which the lens changes the angle of light can be used to indicate the magnitude of the refraction angle of light.

[0121] 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; and the larger the distance between two adjacent lens structures 103, the smaller the distribution density of the lens structures 103.

[0122] Optionally, the distance between two adjacent lens structures 103 may range from 0 μm to 4 μm. Figure 19 , when the distance between two adjacent lens structures 103 is 0 μm, the two adjacent lens structures 103 are in direct contact. Figure 20 There may be a certain distance between two adjacent lens structures 103 .

[0123] In an embodiment of the present application, the distance range between two adjacent lens structures 103 can be determined based on simulation results of the display effect of the display panel 10. For example, multiple test display panels can be prepared, each with a different distance between two adjacent lens structures. By simulating the display effects of each test display panel, at least one target test display panel can be determined. 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 lens structures 103 in the display panel 10 can be determined based on the distance between two adjacent lens structures in at least one target test display panel.

[0124] refer to Figure 21 , the side of the lens structure 103 away from the base substrate 101 can be completely curved. Figure 22, the lens structure 103 is only partially curved on one side away from the base substrate 101, and the other side is flat. The embodiment of the present application does not limit the shape of the lens structure 103. In addition, the curvature of the curved surface of the lens structure 103 away from the base substrate 101 can also be various, for example, Figure 22 The curvature of the curved surface of the lens structure 103 away from the base substrate 101 is Figure 23 The lens structure 103 is shown as being away from the curvature of the curved surface of the base substrate 101 .

[0125] In the examples of this application, refer to Figure 17 and Figure 18 The shape of the orthographic projection of the lens structure 103 on the base substrate 101 can be a circle. Of course, the shape of the orthographic projection of the lens structure 103 on the base substrate 101 can be other shapes, which is not limited in the embodiment of the present application.

[0126] Optionally, when the lens structure 103 is a convex lens and the orthographic projection of the lens structure 103 on the substrate 101 is a circle, refer to Figure 24 The diameter h1 of the lens structure 103 may be in the range of 2 μm to 6 μm, and the dome height h2 may be in the range of 1.5 μm to 4 μm. Furthermore, the thickness h3 of the flat structure layer 104 may be slightly higher than the dome height h2 of the lens structure 103. For example, the thickness h3 of the flat structure layer 104 may be in the range of 5 μm to 6 μm.

[0127] For example, Figure 25 This is a schematic diagram of an electron microscope lens structure provided in an embodiment of the present application. Figure 25 , two lens structures 103 are shown, 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, the arch height h2 may be 1.56 μm, and the distance between the two lens structures 103 may be 1.97 μm.

[0128] Optionally, when the lens structure 103 is a concave lens and the orthographic projection of the lens structure 103 on the substrate 101 is a circle, refer to Figure 26 The diameter g1 of the lens structure 103 can range from 1 μm to 6 μm, the groove depth g2 can range from 1.5 μm to 4 μm, and the height g3 can range from 1.9 μm to 5 μm. Furthermore, the thickness h3 of the flat structure layer 104 can be slightly greater than the height h3 of the lens structure 103. For example, the thickness g4 of the flat structure layer 104 can range from 5 μm to 6 μm.

[0129] For example, Figure 27 This is a schematic diagram of an electron microscope with another lens structure provided in an embodiment of the present application. Figure 27, two lens structures 103 are shown, 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, the arch height h2 may be 1.56 μm, and the distance between the two lens structures 103 may be 1.97 μm.

[0130] In an embodiment of the present application, the size ranges of the various dimensions of the lens structure 103 can be determined based on simulation results of the display effect of the display panel 10. For example, multiple test display panels can be prepared, each with a different lens structure size. By simulating the display effects of each test display panel, at least one target test display panel can be determined. The display effect of each target test display panel is higher than that of the other test display panels. Thus, the size of the lens structure 103 in the display panel 10 can be determined based on the size of the lens structure in the at least one target test display panel.

[0131] refer to Figure 28 The display panel 10 may further include a thin-film encapsulation layer (TFE) 105 . The TFE 105 may be located between the plurality of sub-pixels 102 and the plurality of lens structures 103 to encapsulate the plurality of sub-pixels 102 .

[0132] The surface of the encapsulation film layer 105 away from the sub-pixels 102 can be a plane. Thus, the lens structures 103 can be formed on a plane, which reduces the difficulty of preparing the lens structures 103 and improves the uniformity of the light convergence or divergence of the lens structures 103.

[0133] Figure 29 This is an electron microscope schematic diagram after preparing a packaging film layer provided in an embodiment of the present application. Figure 30 This is a schematic diagram of an electron microscope after preparing multiple lens structures provided in an embodiment of the present application. Figure 29 and Figure 30 It can be seen that in order to determine the effect of the lens structure 103 on the brightness decay rate of sub-pixels 102 of different colors, the orthographic projections of the multiple lens structures 103 on the base substrate 101 can be located on the light-emitting region b of each sub-pixel 102. In other words, a lens structure 103 is provided on the light-emitting region b of each sub-pixel 102 of each color in the display panel 10.

[0134] When testing the effect of the lens structure 103 on the brightness decay rate of sub-pixels 102 of different colors, the sub-pixels 102 can be individually illuminated in batches, with all illuminated sub-pixels 102 emitting the same color of light each time. This allows testing the effect of the lens structure 103 on the brightness decay rate of each color of sub-pixel 102, thereby determining which color of sub-pixel 102 has the best light-emitting area for the lens structure 103.

[0135] Furthermore, during the test process, there is no need to prepare multiple test display panels, so that the lens structures 103 in each test display panel are set on sub-pixels 102 of different colors. Instead, only one test display panel can be prepared, thereby reducing the test cost.

[0136] refer to Figure 28 It can be seen that 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 sequence along a side away from the base substrate 101 .

[0137] Optionally, 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 acrylic (PMMA) resin, and the thermosetting resin may include epoxy resin.

[0138] In the embodiment of the present application, the organic material layer 1052 can be manufactured by ink jet printing (IJP), and the first inorganic material layer 1051 and the second inorganic material layer 1053 can be manufactured by chemical vapor deposition (CVD).

[0139] refer to Figure 28 Each sub-pixel 102 may include: an anode layer 1021, a light-emitting layer 1022, and a cathode layer 1023, stacked sequentially in a direction away from the base substrate 101. The display panel 10 also 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 multiple hollow regions. Each hollow region is used to expose the anode layer 1021 of a sub-pixel 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.

[0140] refer to Figure 28It can also be seen that the display panel 10 may further include a module layer 107. The module layer 107 may be located on a side of the flat structure layer 104 away from the base substrate 101. The module layer 107 may include a polarizer and a cover plate.

[0141] In the embodiment of the present application, in order to reflect the display effect of the display panel 10 in the embodiment of the present application, the brightness decay rate and chromaticity of the white light displayed by the sub-pixels 102 of various colors in the display panel 10 can be tested.

[0142] Optionally, the white light brightness decay rate of the display panel in the prior art and the white light brightness decay rate of the display panel in the first embodiment (Example 1) of the present application in which the lens structure 103 is a convex lens or a concave lens are tested to obtain Figure 31 . refer to Figure 31 It can be seen that the white light brightness decay rate of the display panel whose lens structure 103 is a concave lens is slower than that of the display panel whose lens structure 103 is a convex lens. Moreover, regardless of whether the lens structure 103 in the display panel of the embodiment of the present application is a convex lens or a concave lens, its white light brightness decay rate is slower than that of the display panel in the prior art. In other words, the display effect of the display panel 10 provided by the embodiment of the present application is better than that of the display panel in the prior art.

[0143] Optionally, the chromaticity of white light of the display panel in the prior art and the chromaticity of white light of the display panel in which the lens structure 103 is a convex lens or a concave lens in the first implementation of the embodiment of the present application are tested to obtain Figure 32 . refer to Figure 32 It can be seen that the chromaticity of white light from a display panel whose lens structure 103 is a concave lens is bluish compared to the chromaticity of white light from a display panel whose lens structure 103 is a convex lens. Furthermore, regardless of whether the lens structure 103 in the display panel of the present embodiment is a convex lens or a concave lens, the chromaticity of white light from the display panel is bluish compared to the chromaticity of white light from a display panel in the prior art.

[0144] Since the display panel 10 displays yellow, the display panel displays bluish light which is not easily perceived by the human eye, and thus the chromaticity of the white light of the display panel provided in the embodiment of the present application is bluish, which is better than the chromaticity of the white light of the display panel in the prior art which displays yellow.

[0145] Optionally, the white light brightness decay rate of the display panel in the prior art and the white light brightness decay rate of the display panel in the second implementation manner (Example 2) of the present application embodiment in which the lens structure 103 is a convex lens are tested to obtain Figure 33 . refer to Figure 33It can be seen that the white light brightness decay rate of the display panel with the convex lens lens structure 103 is slower than that of the display panel in the prior art. In other words, the display effect of the display panel 10 provided in the embodiment of the present application is better than that of the display panel in the prior art.

[0146] Optionally, the chromaticity of white light from a display panel in the prior art and the chromaticity of white light from a display panel in which the lens structure 103 is a convex lens in the second implementation of the present application are tested to obtain Figure 34 . refer to Figure 34 It can be seen that the chromaticity of white light from the display panel in which the lens structure 103 is a convex lens is bluish compared to the chromaticity of white light from the display panel in the prior art.

[0147] Since the display panel 10 displays yellow, the display panel displays bluish light which is not easily perceived by the human eye, and thus the chromaticity of the white light of the display panel provided in the embodiment of the present application is bluish, which is better than the chromaticity of the white light of the display panel in the prior art which displays yellow.

[0148] In addition, 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 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 of the embodiment of the present application were tested, and the obtained Figure 35 . refer to Figure 35 It can be seen that the chromaticity of the white light of the display panel in Example 2 is bluish compared to the chromaticity of the white light of the display panel in Example 1. Moreover, the chromaticity of the white light of the display panels in Examples 1 and 2 is bluish compared to the chromaticity of the white light of the display panel in the prior art.

[0149] in, Figure 32 ,as well as Figures 34 to 35 The curve track in may be a CIE track, which may be used to represent the color shift track of the display panel in the embodiment of the present application in the color gamut diagram when displaying a white image. Its abscissa CIE_X and ordinate CIE_Y represent chromaticity values, respectively.

[0150] In summary, the embodiments of the present application provide a display panel, which determines the relationship between the refractive index of the flat structure layer and the refractive index of the lens structure in the display panel based on the relationship between the brightness decay rate of the first color sub-pixel and the brightness decay rate of the second color sub-pixel in the display panel, thereby making the brightness decay rate of the first color sub-pixel and the brightness decay rate of the second color sub-pixel as consistent as possible, thereby improving the display effect of the display panel.

[0151] The display panel in the embodiments of the present application can effectively solve the color shift problem of the display panel without changing the existing sub-pixel structure, providing greater flexibility in the selection of materials and thickness design for each film layer in the sub-pixel. Furthermore, the display panel in the embodiments of the present application can be a waterfall display panel or a folding display panel, allowing for targeted adjustment of the edge display area of the waterfall display panel and the curved display area of the folding display panel. This provides flexibility and versatility, and has great application and mass production value.

[0152] Figure 36 Schematic diagram of a display device provided by an embodiment of the present application. Figure 36 As can be seen, the display device may include a power supply component 20 and a display panel. The display panel may be the display panel 10 provided in the above embodiment. The power supply component 20 may be connected to the display panel 10 to supply power to the display panel 10.

[0153] Optionally, the display device can 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 monitor, a laptop computer, a digital photo frame or a navigator, or any other product or component with a display function and a fingerprint recognition function.

[0154] It should be noted that in the accompanying drawings, the sizes of layers and regions may be exaggerated for clarity of illustration. It will also be understood that when an element or layer is referred to as being "on" another element or layer, it may be directly on the other element, or there may be an intermediate layer. In addition, it will be understood that when an element or layer is referred to as being "under" another element or layer, it may be directly under the other element, or there may be more than one intermediate layer or element. In addition, it will also be understood that when a layer or element is referred to as being "between" two layers or elements, it may be the only layer between the two layers or elements, or there may also be more than one intermediate layer or element. Similar reference numerals throughout the text indicate similar elements.

[0155] In this application, the terms "first", "second" and "third" are used for descriptive purposes only and should not be understood as indicating or implying relative importance. The term "plurality" refers to two or more than two, unless expressly limited otherwise.

[0156] The above description is merely an optional embodiment of the present application and is not intended to limit the present application. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present application shall be included in the scope of protection of the present application.

Claims

1. A curved display panel, characterized in that: The curved display panel includes: A base substrate, the base substrate having a flat display area and two curved display areas located on both sides of the flat display area; a plurality of sub-pixels of different colors, the plurality of sub-pixels of different colors being located on one side of the base substrate, the plurality of sub-pixels of different colors including a first color sub-pixel and a second color sub-pixel, wherein a brightness decay rate of the second color sub-pixel is different from a brightness decay rate of the first color sub-pixel; A plurality of lens structures, wherein the plurality of lens structures are located on a side of the plurality of sub-pixels of different colors away from the substrate substrate, and the orthographic projections of the lens structures on the substrate substrate are located in the curved display area and not in the flat display area; the orthographic projections of the plurality of lens structures on the substrate substrate overlap with the orthographic projections of the light-emitting areas of the first color sub-pixels located in the curved display area on the substrate substrate, and do not overlap with the orthographic projections of the light-emitting areas of the second color sub-pixels located in the curved display area on the substrate substrate; wherein the number of lens structures located in the light-emitting areas of the sub-pixels ranges from 5 to 20, and the plurality of lens structures on the substrate substrate The orthographic projection of the lens structure also overlaps with the orthographic projection of the non-luminous areas of the multiple sub-pixels located in the curved display area on the substrate. The greater the distribution density of the lens structure, the greater the degree of change in the angle of the light caused by the lens structure. The smaller the distribution density of the lens structure, the smaller the degree of change in the angle of the light caused by the lens structure. The degree of change in the angle of the light caused by the lens structure is used to represent the magnitude of the refraction angle of the light. The smaller the distance between two adjacent lens structures, the greater the distribution density of the lens structure. The greater the distance between two adjacent lens structures, the smaller the distribution density of the lens structure. The range of the distance between two adjacent lens structures is 0 microns to 4 microns. a flat structure layer, the flat structure layer being located on a side of the multiple lens structures away from the base substrate, and having a refractive index smaller than that of the lens structures, the lens structures being concave lenses, and configured to diverge light emitted by the first color sub-pixels; And, a packaging film layer, which is located between the multiple sub-pixels and the multiple lens structures and is used to encapsulate the multiple sub-pixels, and a side of the packaging film layer away from the multiple sub-pixels is a plane.

2. The curved display panel according to claim 1, wherein: The encapsulation film layer includes: a first inorganic material layer, an organic material layer and a second inorganic material layer stacked in sequence along a side away from the base substrate.

3. The curved display panel according to claim 1 or 2, wherein: Each of the sub-pixels comprises: an anode layer, a light-emitting layer, and a cathode layer stacked in sequence in a direction away from the base substrate; the display panel further comprises: a pixel defining layer; The pixel defining layer is located between the anode layer and the light emitting layer, and the pixel defining layer has a plurality of hollow regions, each of which is used to expose the anode layer of one sub-pixel.

4. A display device, characterized in that: The display device comprises: a power supply component, and the curved display panel according to any one of claims 1 to 3; The power supply component is connected to the curved display panel and is used to supply power to the curved display panel.

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