Display panel, preparation method thereof and display device

Abstract

The invention discloses a display panel, a preparation method thereof and a display device. The preparation method of the display panel comprises the following steps: providing a driving substrate; forming a filter layer on the driving substrate; the light filtering layer comprises a first light filtering unit, a second light filtering unit and a third light filtering unit; the light transmittance of the third light filtering unit is smaller than that of the first light filtering unit or the second light filtering unit; preparing a first lens on one side, deviating from the driving substrate, of the third filtering unit; the first lens is used for scattering the light beams emitted by the third light filtering unit; and preparing a second lens on the sides, deviating from the driving substrate, of the first light filtering unit and the second light filtering unit. According to the technical scheme, the color cast problem of the display panel can be solved, and the display effect of the display panel is improved.

Description

Technical Field

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

[0002] Compared with traditional liquid crystal display panels, organic electroluminescence display (OLED) panels do not require a separate light source due to their self-luminous characteristics, and can be made thinner and lighter. In addition, OLED display panels have been widely used in the field of display technology due to their excellent color realization, response speed, viewing angle, contrast, and low power consumption due to low voltage operation.

[0003] The current silicon-based OLED display panels generally use a combination of white light and color filters to achieve colorization. However, due to the limitations of the OLED device structure, some light is confined inside the device structure and cannot be used, and the transmittance of the color filter is low, which makes the OLED display panel have a low light extraction efficiency. In order to improve the light extraction efficiency, a lens is usually set to focus the light to the center of the display panel, but this solution reduces the brightness of the panel in the tilted direction, and color deviation occurs when the user watches at a non-normal viewing angle. Summary of the invention

[0004] The present invention provides a display panel and a manufacturing method thereof, and a display device, so as to improve the color shift problem of the display panel at a non-normal viewing angle, and enhance the display effect of the display panel and the visual experience of the user.

[0005] In a first aspect, the present invention provides a method for preparing a display panel, comprising:

[0006] Providing a drive substrate;

[0007] A filter layer is formed on the driving substrate; the filter layer comprises a first filter unit, a second filter unit and a third filter unit; the light transmittance of the third filter unit is less than the light transmittance of the first filter unit or the second filter unit;

[0008] A first lens is provided on a side of the third filter unit away from the drive substrate; the first lens is used for scattering the light beam emitted by the third filter unit;

[0009] A second lens is prepared on a side of the first filter unit and the second filter unit that is away from the driving substrate.

[0010] Optionally, the first lens comprises a concave lens;

[0011] The concave surface of the concave lens is located at a side of the filter layer away from the driving substrate.

[0012] Optionally, the method for preparing a display panel further includes: preparing a first lens on a side of the third filter unit away from the drive substrate, including:

[0013] A whole layer of first lens colloid is prepared on a surface of the filter layer that is away from the driving substrate;

[0014] Providing a first lens embossed plate; the first lens embossed plate comprises first lens embossed structures corresponding to the third filter units;

[0015] Using the first lens embossing plate to emboss the first lens colloid;

[0016] The first lens colloid is exposed, developed, and cured to form the first lens.

[0017] Optionally, exposing, developing, and curing the first lens colloid to form the first lens includes:

[0018] exposing the first lens colloid located at a side of the third filter unit away from the driving substrate;

[0019] Developing and removing the first lens colloid located on the first filter unit and the second filter unit at a side away from the driving substrate;

[0020] The first lens colloid located at a side of the third filter unit away from the driving substrate is solidified to form the first lens located only at a side of the third filter unit away from the driving substrate.

[0021] Optionally, a second lens is prepared on a side of the first filter unit and the second filter unit that is away from the driving substrate, comprising:

[0022] Prepare a whole layer of second lens colloid on the first filter unit, the second filter unit and the first lens at a side away from the driving substrate;

[0023] The second lens colloid is exposed, developed, and cured to form the second lens.

[0024] Optionally, exposing and developing the second lens colloid to form the second lens includes:

[0025] exposing the first lens colloid located at a side of the first filter unit and the second filter unit away from the driving substrate;

[0026] Developing and removing the second lens colloid located on a side of the third filter unit away from the driving substrate;

[0027] The first lens colloid located at a side of the first filter unit away from the driving substrate and the first lens colloid located at a side of the second filter unit away from the driving substrate are solidified to form the first lens located at a side of the first filter unit away from the driving substrate and the first lens located at a side of the second filter unit away from the driving substrate.

[0028] Optionally, the refractive index of the filter layer is n1, and the refractive index of the first lens is n2;

[0029] Among them, n2>n1.

[0030] Optionally, the second lens includes the concave lens, and the concave surface of the concave lens is located on a side of the filter layer away from the driving substrate.

[0031] In a second aspect, the present invention further provides a display panel, which is manufactured by the method for manufacturing a display panel according to the first aspect.

[0032] In a third aspect, the present invention provides a display device, comprising the display panel described in the second aspect.

[0033] The technical solution provided by the present invention is to prepare a first lens on the side of the third filter layer with a smaller light transmittance away from the driving substrate, and the first lens is used to scatter the light beam emitted by the third filter unit, so that the light beam emitted by the third filter unit can be emitted not only at a normal viewing angle but also at a non-normal viewing angle, so as to improve the color deviation problem of the display panel, improve the display effect of the display panel, and enhance the user's visual experience. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] Figure 1 A flow chart of a method for manufacturing a display panel provided by an embodiment of the present invention;

[0035] Figure 2 A schematic diagram of a process structure for preparing a display panel provided by an embodiment of the present invention;

[0036] Figure 3 A schematic diagram of a spectrum curve provided by an embodiment of the present invention;

[0037] Figure 4 A schematic diagram of the optical path of a concave lens provided by an embodiment of the present invention;

[0038] Figure 5 A flow chart of a method for preparing a first lens provided by an embodiment of the present invention;

[0039] Figure 6 A schematic diagram of a process structure for preparing a first lens provided by an embodiment of the present invention;

[0040] Figure 7 A flow chart of a method for preparing a second lens provided by an embodiment of the present invention;

[0041] Figure 8 A schematic diagram of a process structure for preparing a second lens provided by an embodiment of the present invention;

[0042] Fig. 9 A schematic diagram of the structure of a display panel provided by an embodiment of the present invention;

[0043] Fig.10 A schematic diagram of a top view structure of a first lens provided by an embodiment of the present invention;

[0044] Fig.11 A schematic structural diagram of a display device provided by an embodiment of the present invention. DETAILED DESCRIPTION

[0045] The present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It is to be understood that the specific embodiments described herein are only used to explain the present invention, rather than to limit the present invention. It should also be noted that, for ease of description, only parts related to the present invention, rather than all structures, are shown in the accompanying drawings.

[0046] An embodiment of the present invention provides a method for preparing a display panel. The method is applicable to preparing a display panel to improve the color shift problem of the display panel at a non-normal viewing angle. Figure 1 A flow chart of a method for manufacturing a display panel provided by an embodiment of the present invention, Figure 2 A schematic diagram of a process structure for preparing a display panel provided by an embodiment of the present invention is shown in FIG. Figure 1 As shown, the method for preparing the display panel includes:

[0047] S101, providing a driving substrate.

[0048] The driving substrate 10 may include a plurality of driving circuits and light-emitting devices, and each driving circuit is electrically connected to each light-emitting device to provide an electrical signal to the light-emitting device and drive the light-emitting device to emit light.

[0049] Specifically, the specific process of providing a driving substrate can refer to the following description: providing a base substrate, preparing an array-arranged driving circuit on one surface of the base substrate, and arranging an array-arranged light-emitting device on the side of the driving circuit away from the base substrate through mass transfer or other methods, so that each light-emitting device is electrically connected to each driving circuit.

[0050] S102, forming a filter layer on the driving substrate.

[0051] Among them, reference Figure 2The filter layer 20 includes a first filter unit 21, a second filter unit 22 and a third filter unit 23. The light transmittance of the third filter unit 23 is less than the light transmittance of the first filter unit 21 or the second filter unit 22.

[0052] Specifically, the filter layer 20 can filter the light emitted by the light emitting device to emit a light beam with the same color as the light transmission color of the corresponding filter unit to achieve light emission effects of different colors and ensure the normal light emission display of the display panel. The filter layer can be formed on the driving substrate by a pigment dispersion process, a printing process or an electrodeposition process. The method for forming the filter layer can also be other, which is not specifically limited here.

[0053] It should be noted that, on the basis that the light transmittance of the third filter unit 23 is less than the light transmittance of the first filter unit 21 or the second filter unit 22, the light transmittance colors of the first filter unit 21, the second filter unit 22 and the third filter unit 23 can be set according to actual needs. In an optional embodiment, the light transmittance color of the first filter unit 21 is red, the light transmittance color of the second filter unit 22 is green, and the light transmittance color of the third filter unit 23 is blue. Figure 3 A schematic diagram of a spectrum curve provided by an embodiment of the present invention, referring to Figure 3 , curve L1 represents the spectrum curve of the first filter unit 21, curve L2 represents the spectrum curve of the second filter unit 22, curve L3 represents the spectrum curve of the third filter unit 22, the abscissa represents the wavelength, and the ordinate represents the light intensity. Figure 3 It can be seen that the spectrum of the third filter unit 23 is the narrowest, and the light flux of the third filter unit 23 is the smallest, that is, the light transmittance of the third filter unit 23 is the smallest. When the display panel displays images, the color cast problem caused by the third filter unit 23 is more serious.

[0054] S103, preparing a first lens on a side of the third filter unit away from the driving substrate.

[0055] Among them, reference Figure 2 The first lens 31 is used to scatter the light beam emitted by the third filter unit 23. The specific structure of the first lens 31 can be set according to actual needs and is not specifically limited here. In an optional embodiment, the first lens 31 includes a concave lens, and the concave surface of the concave lens is located on the side of the filter layer 20 away from the drive substrate 10. Figure 4 A schematic diagram of the optical path of a concave lens provided in an embodiment of the present invention is shown in FIG. Figure 4As shown, when parallel light is incident on the concave lens, the light beam emitted from the concave surface of the concave lens is a scattered light beam. Therefore, in order to improve the color deviation problem of the light beam emitted by the third filter unit 23, the first lens 31 can be set as a concave lens, so that the light beam emitted by the third filter unit 23 can be scattered by the first lens 31. When the user watches the display panel at a non-normal viewing angle, the display effect of the display panel can be improved, thereby improving the user's visual experience.

[0056] Specifically, the first lens can be directly prepared on the side of the third filter unit away from the driving substrate by using a photolithography process, or the first lens is first provided and then attached to the side of the third filter unit away from the driving substrate. There are other ways to prepare the first lens on the side of the third filter unit away from the driving substrate, which are not specifically limited here.

[0057] S104, preparing a second lens on a side of the first filter unit and the second filter unit facing away from the driving substrate.

[0058] Among them, the second lens may include a convex lens, etc., and can be set according to actual needs, and is not specifically limited here.

[0059] Specifically, the second lens can be directly prepared on the side of the first filter unit and the second filter unit away from the driving substrate by using a photolithography process, or a plurality of second lenses can be provided first, and then the second lens can be attached to the side of the first filter unit away from the driving substrate, and to the side of the second filter unit away from the driving substrate. There can be other ways to prepare the second lens on the side of the first filter unit and the second filter unit away from the driving substrate, which are not specifically limited here.

[0060] The technical solution provided by the present invention is to prepare a first lens on the side of the third filter layer with a smaller light transmittance away from the driving substrate, and the first lens is used to scatter the light beam emitted by the third filter unit, so that the light beam emitted by the third filter unit can be emitted not only at a normal viewing angle but also at a non-normal viewing angle, so as to improve the color deviation problem of the display panel, improve the display effect of the display panel, and enhance the user's visual experience.

[0061] In an optional embodiment, Figure 5 A flow chart of a method for preparing a first lens provided in an embodiment of the present invention, Figure 6 A schematic diagram of a process structure for preparing a first lens provided by an embodiment of the present invention is shown in FIG. Figure 5 As shown, a first lens is prepared on a side of the third filter unit away from the driving substrate, including:

[0062] S131, preparing a whole layer of first lens colloid on the surface of the filter layer facing away from the driving substrate.

[0063] The first lens colloid includes a material that can form the first lens. In an optional embodiment, the first lens colloid includes materials such as photoresist, which can be configured according to actual needs and is not specifically limited here.

[0064] Specifically, refer to Figure 6 The first lens colloid 30 can be formed on the surface of the filter layer 20 which is away from the driving substrate 10 by using a spin coating method or a spray coating method.

[0065] S132, providing a first lens printing plate.

[0066] Among them, reference Figure 6 The first lens imprinting plate 43 includes first lens imprinting structures 43 corresponding to the third filter units 23. The first lens imprinting structures 43 can be designed according to the structure of the first lens 31.

[0067] Specifically, the first lens embossing plate 40 may include a metal material such as aluminum or an alloy material such as aluminum alloy. The size of the first lens embossing plate 40 may be consistent with the size of the filter layer 20. According to the distribution position of the third filter units 23 in the filter layer 20, a first lens embossing structure 43 corresponding to each third filter unit 23 is designed in the first lens embossing plate 40.

[0068] S133, using a first lens embossing plate to emboss the first lens colloid.

[0069] Specifically, refer to Figure 6 The first lens imprinted structures 43 of the first lens imprinted plate 40 are placed toward the first lens colloid 30, and in the thickness direction of the display panel, each first lens imprinted structure 43 overlaps with the third filter unit 23 respectively, so that after the pressure toward the driving substrate 10 is applied to the first lens imprinted plate 40, the first lens imprinted structure 43 in the first lens imprinted plate 40 can make the first lens colloid 30 located in the third filter unit 23 away from the driving substrate 10, forming a morphology corresponding to the first lens imprinted structure 43.

[0070] It should be noted that the specific structure of the first lens imprinting structure 43 can be designed according to the required morphology of the first lens 32 . Figure 6 Only when the first lens 31 is a concave lens is shown, the first lens imprinting structure 43 is a convex structure corresponding to the concave lens. When the first lens 31 is other structures, the morphology of the first lens imprinting structure 43 can be adjusted to form the desired first lens 32 using the first lens imprinting plate 40.

[0071] S134, exposing, developing, and curing the first lens colloid to form a first lens.

[0072] The first lens is used to scatter the light beam emitted by the third filter unit. The size of the first lens can be set according to actual needs. For example, when the first lens is a concave lens, the shortest distance between the concave surface away from the drive substrate and the plane close to the drive substrate in the concave lens can be in the range of 0.3μm to 0.5μm, the longest distance between the concave surface away from the drive substrate and the plane close to the drive substrate in the concave lens can be in the range of 2.2μm to 2.7μm, and the diameter of the circle formed by the concave surface in the concave lens is 5.4μm.

[0073] Specifically, the exposure position can be selected according to the type of the first lens colloid. When the first lens colloid is a positive photoresist, the first lens colloid located on the side of the first filter unit and the second filter unit away from the driving substrate can be exposed, and the first lens colloid located on the side of the third filter unit away from the driving substrate is not exposed. When developing is performed subsequently, the developer can only remove the first lens colloid located on the side of the first filter unit and the second filter unit away from the driving substrate, and the first lens colloid located on the side of the third filter unit away from the driving substrate is retained. Then, the currently formed display panel is placed in an environment of 100°C and baked for 15 minutes to form a stable first lens.

[0074] It should be noted that the shapes of the first filter unit, the second filter unit and the third filter unit can be set according to the pixel shape of the display panel. Optionally, the first filter unit, the second filter unit and the third filter unit are all m-gons, where m>4. Exemplarily, Fig.10 A schematic diagram of a top view structure of a first lens provided in an embodiment of the present invention is shown in FIG. Fig.10 As shown, m=6, the first filter unit, the second filter unit and the third filter unit are all hexagonal. At this time, when the first lens is a concave lens or other circular lens, the exposure and development position can be controlled so that the projection of the first lens 31 formed finally is a circle, and the circle formed by the projection is the inscribed circle of the hexagon. The shapes of the first filter unit, the second filter unit and the third filter unit can also be other shapes, which are not specifically limited here.

[0075] The above only shows one preparation process for forming the first lens, and the process for forming the first lens may also be other. Figure 6 , exposing, developing, and curing the first lens colloid 30 to form a first lens 31, including exposing the first lens colloid 30 located on the side of the third filter unit 23 away from the driving substrate 10, developing and removing the first lens colloid 30 located on the side of the first filter unit 21 and the second filter unit 22 away from the driving substrate 10; curing the first lens colloid 30 located on the side of the third filter unit 23 away from the driving substrate 10 to form the first lens 31 located only on the side of the third filter unit 23 away from the driving substrate 10.

[0076] Specifically, when the first lens colloid 30 is a negative photoresist, the first lens colloid 30 located on the side of the third filter unit 23 away from the drive substrate 10 can be exposed, and the first lens colloid 30 located on the side of the first filter unit 21 and the second filter unit 22 away from the drive substrate 10 is not exposed. When developing is performed later, the developer can only remove the first lens colloid 30 located on the side of the first filter unit 21 and the second filter unit 22 away from the drive substrate 10, and the first lens colloid 30 located on the side of the third filter unit 23 away from the drive substrate 10 is retained. Then, the currently formed display panel is placed in an environment of 100° C. and baked for 15 minutes to form a stable first lens 31.

[0077] The technical solution of the embodiment of the present invention is to prepare a whole layer of first lens colloid on the surface of the filter layer on the side away from the driving substrate, and then provide a first lens imprinting plate including first lens imprinting structures arranged one by one corresponding to each third filter unit, so that after the first lens imprinting plate is used to imprint the first lens colloid, and the first lens colloid is exposed, developed, and cured, a first lens corresponding to the first imprinting structure is formed, thereby improving the preparation accuracy and reliability of the first lens.

[0078] In an optional embodiment, Figure 7 A flow chart of a method for preparing a second lens provided by an embodiment of the present invention, Figure 8 A schematic diagram of a process structure for preparing a second lens provided by an embodiment of the present invention is shown in FIG. Figure 7 As shown, a second lens is prepared on the side of the first filter unit and the second filter unit away from the driving substrate, including:

[0079] S141, preparing a whole layer of second lens colloid on the first filter unit, the second filter unit and the first lens on the side away from the driving substrate.

[0080] The second lens colloid includes a material that can form the second lens. In an optional embodiment, the second lens colloid includes materials such as photoresist, which can be configured according to actual needs and is not specifically limited here.

[0081] Specifically, refer to Figure 8 The second lens colloid 50 can be formed on the surface of the first filter unit 21, the second filter unit 22 and the first lens 31 facing away from the driving substrate 10 by using a spin coating method or a spray coating method.

[0082] S142, exposing, developing, and curing the second lens colloid to form a second lens.

[0083] The size of the second lens can be set according to actual needs. Optionally, when the second lens is a convex lens, the maximum thickness between the convex surface of the convex lens away from the drive substrate and the plane close to the drive substrate can be in the range of 2.2 μm to 2.7 μm. Exemplarily, the maximum thickness between the convex surface of the convex lens away from the drive substrate and the plane close to the drive substrate can be in the range of 2.6 μm.

[0084] Specifically, the exposure position can be selected according to the type of the second lens colloid. When the second lens colloid is a positive photoresist, the second lens colloid located on the side of the third filter unit away from the driving substrate can be exposed, and the second lens colloid located on the side of the first filter unit and the second filter unit away from the driving substrate is not exposed. When developing is performed later, the developer can only remove the second lens colloid located on the side of the third filter unit away from the driving substrate, and the second lens colloid located on the side of the first filter unit and the second filter unit away from the driving substrate is retained. Then, the currently formed display panel is placed in an environment of 100°C and baked for 15 minutes to form a stable second lens.

[0085] The above only shows one preparation process for forming the second lens, and the process for forming the second lens may be other. Optionally, the second lens colloid is exposed, developed, and cured to form the second lens, including: exposing the first lens colloid located on the side of the first filter unit and the second filter unit away from the driving substrate; developing and removing the second lens colloid located on the side of the third filter unit away from the driving substrate; curing the first lens colloid located on the side of the first filter unit away from the driving substrate, and the first lens colloid located on the side of the second filter unit away from the driving substrate, to form the first lens located on the side of the first filter unit away from the driving substrate, and the first lens located on the side of the second filter unit away from the driving substrate.

[0086] Specifically, refer to Figure 8 When the second lens colloid 30 is a negative photoresist, the second lens colloid 50 located on the side of the first filter unit 21 and the second filter unit 22 away from the driving substrate 10 can be exposed, and the second lens colloid 50 located on the side of the third filter unit 23 away from the driving substrate 10 is not exposed. When developing later, the developer can only remove the second lens colloid 50 located on the side of the third filter unit 23 away from the driving substrate 10, and the second lens colloid 50 located on the side of the first filter unit 21 and the second filter unit 22 away from the driving substrate 10 is retained. Then, the currently formed display panel is placed in an environment of 100°C and baked for 15 minutes to form a stable second lens 32.

[0087] It should be noted that due to the properties of the second lens colloid 30 itself, when the developer is used for development, the formed second lens 32 will have a slightly convex morphology, so that the second lens 32 has a structure similar to a convex lens, and the light beams emitted by the first filter unit 21 and the second filter unit 22 can be converged to a certain extent, so that the display panel has a better display effect under the normal viewing angle.

[0088] Optional, reference Figure 2 The refractive index of the filter layer 20 is n1, and the refractive index of the first lens 31 is n2; wherein n2>n1.

[0089] Specifically, when a light beam enters a medium with a larger refractive index from a medium with a smaller refractive index, the refraction angle of the light is smaller than the incident angle. Thus, by setting the refractive index n2 of the first lens 31 to be larger than the refractive index n1 of the filter layer 20, the light beam emitted from the filter layer 20 to the first lens 31 can be deflected in the normal direction of the light beam, which can improve the light extraction efficiency of the first lens 31, thereby improving the display effect of the display panel 100.

[0090] It should be noted that, on the basis that the refractive index n1 of the filter layer 20 is less than the refractive index n2 of the first lens 31, the specific values ​​of the refractive index n1 of the filter layer 20 and the refractive index n2 of the first lens 31 can be set according to actual needs. In an exemplary embodiment, the refractive index n1 of the filter layer 20 is 1.4, and the refractive index n2 of the first lens 31 is in the range of 1.7 to 1.9. It can also be other values, which are not specifically limited here. In other optional embodiments, the refractive index of the second lens can be the same as the refractive index of the first lens, so as to improve the light extraction efficiency of the area where the first lens and the second lens are located, and improve the display effect of the display panel.

[0091] Optional, Fig. 9 A schematic diagram of the structure of a display panel provided by an embodiment of the present invention is shown in FIG. Fig. 9 As shown, the second lens 32 comprises a concave lens, and the concave surface of the concave lens is located on the side of the filter layer 20 away from the driving substrate 10 .

[0092] Specifically, by setting the first lens 31 and the second lens 32 as concave lenses, the light emitted by the filter layer 30 can be scattered by the convex lens, thereby ensuring the display effect at a normal viewing angle and improving the display effect of the display panel 100 at a non-normal viewing angle, thereby enhancing the user's visual experience.

[0093] Based on the same inventive concept, an embodiment of the present invention provides a display panel, which is manufactured by the display panel manufacturing method provided by the embodiment of the present invention and has the same beneficial effects as the display panel manufacturing method. The similarities can be referred to above and will not be repeated here.

[0094] Based on the same inventive concept, an embodiment of the present invention further provides a display device, which includes a display panel provided by any embodiment of the present invention. Therefore, the display device has the technical features of the display panel provided by the embodiment of the present invention, and can achieve the beneficial effects of the display panel provided by the embodiment of the present invention. The similarities can be referred to the above description of the display panel provided by the embodiment of the present invention, and will not be repeated here.

[0095] For example, Fig.11 A schematic diagram of a display device according to an embodiment of the present invention is shown in FIG. Fig.11 As shown, the display device 200 includes the display panel 100 provided in the embodiment of the present invention. The display device 200 provided in the embodiment of the present invention can be any electronic product with a display function, including but not limited to the following categories: mobile phones, televisions, laptops, desktop displays, tablet computers, digital cameras, smart bracelets, smart glasses, car displays, medical equipment, industrial control equipment, touch interactive terminals, etc., and the embodiment of the present invention does not specifically limit this.

[0096] Note that the above are only preferred embodiments of the present invention and the technical principles used. Those skilled in the art will understand that the present invention is not limited to the specific embodiments described herein, and that various obvious changes, readjustments, combinations and substitutions can be made by those skilled in the art without departing from the scope of protection of the present invention. Therefore, although the present invention has been described in more detail through the above embodiments, the present invention is not limited to the above embodiments, and may include more other equivalent embodiments without departing from the concept of the present invention, and the scope of the present invention is determined by the scope of the appended claims.

Claims

1. A method for preparing a display panel, characterized in that: include: Providing a drive substrate; A filter layer is formed on the driving substrate; the filter layer comprises a first filter unit, a second filter unit and a third filter unit; The light transmittance of the third filter unit is less than the light transmittance of the first filter unit or the second filter unit; A first lens is provided on a side of the third filter unit away from the drive substrate; the first lens is used for scattering the light beam emitted by the third filter unit; A second lens is prepared on a side of the first filter unit and the second filter unit that is away from the driving substrate.

2. The preparation method according to claim 1, characterized in that: The first lens comprises a concave lens; The concave surface of the concave lens is located at a side of the filter layer away from the driving substrate.

3. The preparation method according to claim 1, characterized in that: Also includes: A first lens is prepared on a side of the third filter unit away from the driving substrate, comprising: A whole layer of first lens colloid is prepared on a surface of the filter layer that is away from the driving substrate; Providing a first lens embossed plate; the first lens embossed plate comprises first lens embossed structures corresponding to the third filter units; Using the first lens embossing plate to emboss the first lens colloid; The first lens colloid is exposed, developed, and cured to form the first lens.

4. The preparation method according to claim 3, characterized in that: Exposing, developing, and curing the first lens colloid to form the first lens includes: exposing the first lens colloid located at a side of the third filter unit away from the driving substrate; Developing and removing the first lens colloid located on the first filter unit and the second filter unit at a side away from the driving substrate; The first lens colloid located at a side of the third filter unit away from the driving substrate is solidified to form the first lens located only at a side of the third filter unit away from the driving substrate.

5. The preparation method according to claim 1, characterized in that: A second lens is prepared on a side of the first filter unit and the second filter unit away from the driving substrate, comprising: Prepare a whole layer of second lens colloid on the first filter unit, the second filter unit and the first lens at a side away from the driving substrate; The second lens colloid is exposed, developed, and cured to form the second lens.

6. The preparation method according to claim 5, characterized in that: Exposing and developing the second lens colloid to form the second lens comprises: exposing the first lens colloid located at a side of the first filter unit and the second filter unit away from the driving substrate; Developing and removing the second lens colloid located on a side of the third filter unit away from the driving substrate; The first lens colloid located at a side of the first filter unit away from the driving substrate and the first lens colloid located at a side of the second filter unit away from the driving substrate are solidified to form the first lens located at a side of the first filter unit away from the driving substrate and the first lens located at a side of the second filter unit away from the driving substrate.

7. The preparation method according to claim 1, characterized in that: The refractive index of the filter layer is n1, and the refractive index of the first lens is n2; Among them, n2>n1.

8. The preparation method according to claim 2, characterized in that: The second lens includes the concave lens, and the concave surface of the concave lens is located at a side of the filter layer away from the driving substrate.

9. A display panel, characterized in that: The display panel is prepared by the method for preparing the display panel according to any one of claims 1 to 8.

10. A display device, characterized in that: Comprising the display panel as claimed in claim 9.

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