Display panel, manufacturing method thereof and display device

Abstract

The invention provides a display panel, a manufacturing method thereof and a display device.The display panel comprises a driving backboard, a light-emitting layer located on the driving backboard, a pixel defining layer used for limiting the light-emitting layer and a color film layer located on the side, away from the driving backboard, of the light-emitting layer; the anti-reflection part is positioned between the light-emitting layer and the color film layer; wherein the color film layer comprises a shading part and a filtering part surrounded by the shading part; the opening width of the shading part is larger than that of the pixel defining layer, and the orthographic projection of the light-emitting layer on the driving back plate completely falls into the area range of the orthographic projection of the filtering part on the driving back plate; the anti-reflection part is located on the side, away from the light-emitting layer, of the opening of the pixel defining layer and arranged around the light-emitting layer, and the anti-reflection part is provided with a nanometer pattern used for reducing the light reflectivity.

Description

Technical Field

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

[0002] High display quality, low power consumption, and thinness have always been the development trend of display technology. One of the factors affecting display quality is the reflectivity of the screen. The higher the reflectivity of the screen, the lower the contrast of the display device, which is more obvious in outdoor environments.

[0003] How to effectively reduce the overall reflectivity of the display device has become a technical problem that needs to be solved urgently. Summary of the invention

[0004] The present invention provides a display panel, a manufacturing method thereof and a display device, which are used to effectively reduce the overall light reflectivity of the display device and improve the display quality while taking into account the light extraction efficiency of the light emitting layer.

[0005] In a first aspect, an embodiment of the present invention provides a display panel, including:

[0006] A driving backplane, a light-emitting layer located on the driving backplane, a pixel defining layer for defining the light-emitting layer, a color filter layer located on a side of the light-emitting layer away from the driving backplane, and an anti-reflection portion located between the light-emitting layer and the color filter layer;

[0007] Among them, the color filter layer includes a shading portion and a filtering portion surrounded by the shading portion; the opening width of the shading portion is greater than the opening width of the pixel defining layer, and the orthographic projection of the light-emitting layer on the driving backplane completely falls within the area of ​​the orthographic projection of the filtering portion on the driving backplane; the anti-reflection portion is located on the side of the opening of the pixel defining layer away from the light-emitting layer, and is arranged around the light-emitting layer, and the anti-reflection portion has a nano pattern for reducing light reflectivity.

[0008] In a possible implementation, it further includes a thin film encapsulation layer located between the light-emitting layer and the color filter layer; and the surface of at least a portion of the thin film encapsulation layer facing away from the driving backplane is provided with the nano pattern.

[0009] In a possible implementation, the thin film encapsulation layer includes a first inorganic encapsulation layer, an organic encapsulation layer, and a second inorganic encapsulation layer sequentially arranged away from the driving backplane, and the surface of the first inorganic encapsulation layer on one side away from the driving backplane is provided with the nano pattern.

[0010] In a possible implementation, it further includes a cathode layer located on a side of the light-emitting layer away from the driving backplane; and the nano pattern is provided on a surface of a side of the cathode layer away from the driving backplane.

[0011] In a possible implementation manner, the nano-pattern is arranged in a groove.

[0012] In a possible implementation, along a direction perpendicular to the plane where the driving back plate is located, a cross-sectional shape of the groove is at least one of a triangle, a rectangle, a trapezoid, and a diamond.

[0013] In a possible implementation, along a direction parallel to the plane where the driving back plate is located, the cross-sectional area of ​​the groove along a direction away from the driving back plate tends to decrease.

[0014] In a possible implementation, the anti-reflection portion is disposed in a non-overlapping area between an opening of the pixel defining layer and an opening of the shading portion, and an orthographic projection of the anti-reflection portion on the driving backplane does not overlap with an orthographic projection of the shading portion on the driving backplane.

[0015] In a possible implementation manner, an orthographic projection of the anti-reflection portion on the driving backplane and an orthographic projection of the light shielding portion on the driving backplane are arranged to overlap with each other.

[0016] In a second aspect, an embodiment of the present invention further provides a display device, including:

[0017] A display panel as described in any one of the above items.

[0018] In a third aspect, an embodiment of the present invention provides a method for manufacturing a display panel, comprising:

[0019] forming a pattern of a pixel definition layer on a driving backplane;

[0020] forming a light-emitting layer in the opening of the pixel defining layer;

[0021] An anti-reflection portion is formed on a side of the opening of the pixel defining layer away from the light-emitting layer and arranged around the light-emitting layer; the anti-reflection portion has a nano pattern for reducing light reflectivity;

[0022] A color filter layer is formed on the side of the light-emitting layer away from the driving backplane; the color filter layer includes a shading portion and a filtering portion surrounded by the shading portion; the opening width of the shading portion is greater than the opening width of the pixel defining layer, and the orthographic projection of the light-emitting layer on the driving backplane completely falls within the area of ​​the orthographic projection of the filtering portion on the driving backplane.

[0023] The beneficial effects of the present invention are as follows:

[0024] The embodiment of the present invention provides a display panel, a manufacturing method thereof and a display device, wherein the display panel includes a driving backplane, a light-emitting layer located on the driving backplane, a pixel defining layer for defining the light-emitting layer, a color filter layer located on the side of the light-emitting layer away from the driving backplane, and an anti-reflection portion located between the light-emitting layer and the color filter layer. In this way, the light reflectivity of the screen can be reduced to a certain extent through the color filter layer.

[0025] In addition, the color filter layer includes a light shielding portion and a light filter portion surrounded by the light shielding portion; wherein the opening width of the light shielding portion is greater than the opening width of the pixel defining layer, and the orthographic projection of the light emitting layer on the driving backplane completely falls within the area of ​​the orthographic projection of the light filter portion on the driving backplane. In this way, it is ensured that all light from the light emitting layer can be emitted from the opening of the pixel defining layer.

[0026] Moreover, the anti-reflection portion is located on the side of the opening of the pixel defining layer away from the light-emitting layer, and is arranged around the light-emitting layer, and the anti-reflection portion has a nano pattern that reduces light reflectivity. In this way, the light reflectivity of the display panel can be effectively reduced by the anti-reflection portion having a nano pattern that reduces light reflectivity. In this way, while taking into account the light extraction efficiency of the light-emitting layer, the light reflectivity of the entire display device is effectively reduced, thereby ensuring the display quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 It is a schematic diagram of a structure of a display device in the related art;

[0028] Figure 2 It is a schematic diagram of a structure of a display device in the related art;

[0029] Figure 3 A schematic diagram of a top view structure of a display panel provided in an embodiment of the present invention;

[0030] Figure 4 For along Figure 3 A schematic diagram of one of the cross-sectional structures in the direction indicated by M;

[0031] Figure 5 A schematic diagram of a top view structure of a nano pattern in a display panel provided by an embodiment of the present invention;

[0032] Figure 6 A schematic diagram of one structure of a display panel provided in an embodiment of the present invention;

[0033] Figure 7 A schematic diagram of one method for preparing a display panel provided in an embodiment of the present invention;

[0034] Description of reference numerals:

[0035] 01-color filter; 02-OLED device; 03-black matrix; 04-light-emitting device; 1-substrate substrate; 10-driving backplane; 20-light-emitting layer; 30-pixel defining layer; 40-color film layer; 50-anti-reflection part; 41-light-shielding part; 42-filtering part; 21-light-emitting device; 60-thin film encapsulation layer; 61-first inorganic encapsulation layer; 62-organic encapsulation layer; 63-second inorganic encapsulation layer; 70-cathode layer; 51-groove. DETAILED DESCRIPTION

[0036] In order to make the purpose, technical solution and advantages of the embodiment of the present invention clearer, the technical solution of the embodiment of the present invention will be clearly and completely described below in conjunction with the drawings of the embodiment of the present invention. Obviously, the described embodiment is a part of the embodiment of the present invention, not all of the embodiments. And in the absence of conflict, the embodiments of the present invention and the features in the embodiments can be combined with each other. Based on the described embodiments of the present invention, all other embodiments obtained by ordinary technicians in the field without creative work are within the scope of protection of the present invention.

[0037] Unless otherwise defined, the technical terms or scientific terms used in the present invention should be understood by people with ordinary skills in the field to which the present invention belongs. The words "first", "second" and similar words used in the present invention do not indicate any order, quantity or importance, but are only used to distinguish different components. "Include" or "comprise" and similar words mean that the elements or objects appearing before the word include the elements or objects listed after the word and their equivalents, without excluding other elements or objects. "Connect" or "connected" and similar words are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect. "Inside", "outside", "upper", "lower" and the like are only used to indicate relative positional relationships. When the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0038] It should be noted that the sizes and shapes of the figures in the accompanying drawings do not reflect the actual proportions, but are only intended to illustrate the content of the present invention. The same or similar reference numerals throughout represent the same or similar elements or elements with the same or similar functions.

[0039] In the related art, the reflectivity of the screen mainly includes two parts: surface reflection and internal reflection of the light-emitting layer opening; among them, an anti-reflection layer can be made on the surface of the display module cover plate, and the surface reflection can be reduced by adding high and low refractive particles. The reduction of the internal reflectivity corresponding to the internal reflection of the light-emitting layer opening can be achieved by a polarizing layer. Exemplarily, a polarizer is arranged above the organic light emitting diode (OLED) device, and the thickness of the polarizer ranges from 35μm to 150μm. The reflection of external ambient light can be reduced by a polarizer. Although the transmittance of polarizers with different structures is different, basically the transmittance of the polarizer is less than 50%. In other words, more than 50% of the light emitted by the OLED device is absorbed by the polarizer, which leads to an increase in the power consumption of the overall OLED device.

[0040] In order to reduce the power consumption and thickness of OLED devices, a color filter on encapsulation (COE) technology has been developed. Through this technology, a thinner color filter 01 is set on the package of the OLED device 02, such as Figure 1 As shown. For a single color OLED display, such as a red light-emitting device, the corresponding red color film photoresist can achieve a transmittance of more than 70% at the central wavelength of the red light-emitting device, and at the same time, it can absorb light in the green and blue bands in the wavelength direction, so that the corresponding light cannot be incident into the opening of the light-emitting device, thereby reducing the light reflection in the opening of the light-emitting device.

[0041] In addition, the light reflectivity in the opening of the light emitting device 04 can be reduced by the black matrix (BM) 03 in the color filter 01. Since the BM 03 is usually made of opaque material, in order to ensure that all the light in the opening of the light emitting device 04 can be emitted, Figure 2 As shown, the opening width of BM 03 is wider than the opening width of the corresponding light emitting device 04. However, reflection will occur at the gap between the opening edge of BM 03 and the opening edge of light emitting device 04. Figure 2 As shown, gap1 and gap2 represent the gaps between BM 03 and the opening of the light emitting device 04. Generally, the widths of gap1 and gap2 are in the range of 2μm to 3μm. For each display device, each light emitting device 04 opening has a gap of 4μm to 6μm, where there is neither BM 03 blocking nor light from the light emitting device 04. In this case, the corresponding area of ​​the gap can neither improve the light extraction efficiency, nor the high reflectivity material of the metal cathode in the corresponding area will cause the overall light reflectivity of the display device to be high.

[0042] In view of this, embodiments of the present invention provide a display panel, a manufacturing method thereof, and a display device, which are used to effectively reduce the overall light reflectivity of the display device and improve display quality while taking into account the light extraction efficiency of the light-emitting layer.

[0043] Combination Figure 3 and Figure 4 As shown, Figure 3 A schematic diagram of a top view of a display panel provided in an embodiment of the present invention is shown. Figure 4 For along Figure 3 A schematic diagram of a cross-sectional structure in the direction indicated by MM; specifically, the display panel includes:

[0044] A driving backplane 10, a light-emitting layer 20 located on the driving backplane 10, a pixel defining layer 30 for defining the light-emitting layer 20, a color filter layer 40 located on a side of the light-emitting layer 20 away from the driving backplane 10, and an anti-reflection portion 50 located between the light-emitting layer 20 and the color filter layer 40;

[0045] Among them, the color film layer 40 includes a shading portion 41 and a filtering portion 42 surrounded by the shading portion 41; the opening width of the shading portion 41 is greater than the opening width of the pixel defining layer 30, and the orthographic projection of the light-emitting layer 20 on the driving backplane 10 completely falls within the area of ​​the orthographic projection of the filtering portion 42 on the driving backplane 10; the anti-reflection portion 50 is located on the side of the opening of the pixel defining layer 30 away from the light-emitting layer 20, and is arranged around the light-emitting layer 20, and the anti-reflection portion 50 has a nano pattern for reducing light reflectivity.

[0046] In a specific implementation process, the display panel includes a driving backplane 10, a light-emitting layer 20, a pixel defining layer 30, a color filter layer 40, and an anti-reflection portion 50; wherein the light-emitting layer 20 is located on the driving backplane 10, the pixel defining layer 30 is used to define the light-emitting layer 20, the color filter layer 40 is located on the side of the light-emitting layer 20 away from the driving backplane 10, and the anti-reflection portion 50 is located between the light-emitting layer 20 and the color filter layer 40. In this way, the color filter layer 40 can effectively reduce the power consumption and thickness of the display panel.

[0047] Exemplarily, the display panel includes a plurality of light-emitting devices 21 with different luminous colors arranged in an array on the driving backplane 10. Exemplarily, the plurality of light-emitting devices 21 include red light-emitting devices, green light-emitting devices and blue light-emitting devices, thereby ensuring the color display of the display panel. Each light-emitting device 21 includes an anode layer, a light-emitting layer 20 and a cathode layer 70 arranged in sequence in a direction away from the driving backplane 10. Exemplarily, the anode layer is located between the light-emitting layer 20 and the driving backplane 10, and the cathode layer 70 is located on the side of the light-emitting layer 20 away from the driving backplane 10. Exemplarily, the light-emitting layer 20 may include a hole injection layer, a hole transport layer, a light-emitting material layer, an electron transport layer and an electron injection layer stacked in sequence in a direction away from the driving backplane 10. Exemplarily, the light-emitting device 21 may be at least one of an organic light-emitting diode (OLED), a quantum dot light-emitting diode (QLED), a Micro LED and a Mini LED. In addition, the driving backplane 10 has a pixel driving circuit for driving the light-emitting device 21 to emit light. Generally, a pixel driving circuit includes a plurality of transistors such as a driving transistor, a switching transistor, and a storage capacitor. The specific structure and working principle of the pixel driving circuit can be realized by referring to the technical implementation in the related art and will not be described in detail here.

[0048] Exemplarily, the driving backplane 10 includes a substrate and a driving circuit layer located on the substrate. Exemplarily, the material of the substrate can be a hard material or a soft material, which is not limited here. Exemplarily, the display panel can be divided into a display area and a peripheral area outside the display area. Accordingly, the driving circuit layer can include a pixel driving circuit located in the display area and a peripheral circuit located in the peripheral area. Exemplarily, the pixel driving circuit can be a circuit structure such as 7T1C, 7T2C, 6T1C, etc., which is not limited here. Moreover, each pixel driving circuit can be connected to each light-emitting device 21 in a one-to-one correspondence, so as to realize the respective control of the corresponding light-emitting device 21. In addition, the peripheral circuit is electrically connected to the pixel driving circuit, and a driving signal can be input to the pixel driving circuit through the peripheral circuit to control the corresponding light-emitting device 21 to emit light. Exemplarily, the peripheral circuit includes a gate driving circuit and a light-emitting control circuit. Of course, the specific structure of the peripheral circuit can also be set according to the actual application needs. For the specific setting of the relevant circuit structure, it can be implemented with reference to the relevant technology, which is not limited here.

[0049] In addition, the color filter layer 40 includes a light shielding portion 41 and a filter portion 42 surrounded by the light shielding portion 41, the opening width of the light shielding portion 41 is greater than the opening width of the pixel defining layer 30, and the orthographic projection of the light emitting layer 20 on the driving backplane 10 completely falls within the area of ​​the orthographic projection of the filter portion 42 on the driving backplane 10. Accordingly, the light emitting layer 20 and the filter portion 42 are arranged in a one-to-one correspondence. In this way, a non-polarized structure is formed by the color filter layer 40. In this way, it is ensured that all light from the light emitting layer 20 in the opening of the pixel defining layer 30 can be emitted, thereby improving the light extraction efficiency of the display panel.

[0050] Moreover, the anti-reflection portion 50 is located at a side of the opening of the pixel defining layer 30 away from the light emitting layer 20 and is disposed around the light emitting layer 20, and the anti-reflection portion 50 has a nano pattern for reducing light reflectivity. Figure 4 The exemplary embodiment shown, Figure 5 Shown is a schematic diagram of a top view of one of the nano pattern settings.

[0051] In the embodiment of the present invention, the anti-reflection unit 50 may be arranged in the following manners, but is not limited to the following manners.

[0052] In one exemplary embodiment, the display panel further includes a thin film encapsulation layer 60 located between the light emitting layer 20 and the color filter layer 40 ; at least a portion of the thin film encapsulation layer 60 has a surface facing away from the driving backplane 10 provided with the nano pattern.

[0053] In the specific implementation process, the display panel also includes a thin film encapsulation layer 60 located between the light-emitting layer 20 and the color film layer 40. Exemplarily, the thin film encapsulation layer 60 may include a first inorganic encapsulation layer 61, an organic encapsulation layer 62, and a second inorganic encapsulation layer 63 that are sequentially arranged away from the drive backplane 10. Of course, the thin film encapsulation layer 60 may also include more film layers in which inorganic encapsulation layers and organic encapsulation layers 62 are alternately arranged, which is not limited here. It should be noted that no matter what structure of the thin film encapsulation layer 60, the top layer of the thin film encapsulation layer 60 is set as an inorganic encapsulation layer, thereby effectively blocking water and oxygen. In addition, at least part of the film layer in the thin film encapsulation layer 60 is provided with a nano pattern on the surface of one side away from the drive backplane 10. Exemplarily, at least part of the film layer in the first inorganic encapsulation layer 61, the organic encapsulation layer 62, and the second inorganic encapsulation layer 63 in the thin film encapsulation layer 60 is provided with a nano pattern on the surface of one side away from the drive backplane 10. Exemplarily, nano patterns are formed on the surfaces of the first inorganic encapsulation layer 61 , the organic encapsulation layer 62 , and the second inorganic encapsulation layer 63 , which are away from the driving backplane 10 .

[0054] In one exemplary embodiment, the thin film encapsulation layer 60 includes a first inorganic encapsulation layer 61, an organic encapsulation layer 62 and a second inorganic encapsulation layer 63 which are sequentially arranged away from the driving backplane 10, and the surface of the first inorganic encapsulation layer 61 on one side away from the driving backplane 10 is provided with the nano pattern.

[0055] Still combined Figure 4 In the exemplary embodiment shown, only the surface of the first inorganic encapsulation layer 61 on one side facing away from the driving backplane 10 is provided with a nano pattern. In this way, while simplifying the manufacturing process, the light reflectivity of the display panel is effectively reduced, and the display quality is improved. In the actual preparation process, illustratively, the surface of the first inorganic encapsulation layer 61 on one side facing away from the driving backplane 10 can be atomized by a photolithography process to form the desired nano pattern. illustratively, the surface of the first inorganic encapsulation layer 61 on one side facing away from the driving backplane 10 can be atomized by a laser process to form the desired nano pattern.

[0056] In one exemplary embodiment, the display panel further includes a cathode layer 70 located on a side of the light emitting layer 20 away from the driving backplane 10 ; and the surface of the cathode layer 70 on a side away from the driving backplane 10 is provided with the nano pattern.

[0057] Combination Figure 6 In the exemplary embodiment shown, the display panel also includes a cathode layer 70 located on the side of the light-emitting layer 20 away from the driving backplane 10. Exemplarily, the material of the cathode layer 70 is a metal material with high reflectivity such as Mg, Ag, Al, etc. Moreover, a nano-pattern is provided on the surface of the cathode layer 70 on the side away from the driving backplane 10. In this way, the light reflectivity of the corresponding area is reduced by the nano-pattern, thereby improving the display quality. In the actual preparation process, exemplarily, the surface of the cathode layer 70 on the side away from the driving backplane 10 can be atomized by a photolithography process to form a desired nano-pattern. Exemplarily, the surface of the cathode layer 70 on the side away from the driving backplane 10 can be atomized by a laser process to form a desired nano-pattern.

[0058] In one exemplary embodiment, the nano pattern is arranged in the form of a groove 51. In this way, the roughness of the surface of the anti-reflection portion 50 facing away from the driving backplane 10 is improved, the light reflectivity of the corresponding area is effectively reduced, and the display quality is improved.

[0059] In one exemplary embodiment, the groove 51 may partially penetrate the corresponding film structure. Figure 4As shown, the groove 51 can be completely through the corresponding film structure. Of course, the specific structure of the relevant groove 51 can also be set according to the actual application needs. In one exemplary embodiment, the groove 51 partially penetrates the first inorganic encapsulation layer 61, thereby effectively reducing the light reflectivity while ensuring the encapsulation effect. Figure 6 In the exemplary embodiment shown, the groove 51 partially penetrates the cathode layer 70, thereby effectively reducing the light reflectivity while reducing the resistivity of the corresponding light emitting device 21, thereby taking into account the display effect.

[0060] In the embodiment of the present invention, along the direction perpendicular to the plane where the driving back plate 10 is located, the cross-sectional shape of the groove 51 is at least one of a triangle, a rectangle, a trapezoid, and a diamond. Of course, the shape of the groove 51 of the nano pattern can also be set according to the actual application needs, which is not limited here. In one of the exemplary embodiments, the nano pattern can be set in a trapezoidal column. In one of the exemplary embodiments, the nano pattern can be set in a conical column.

[0061] In the embodiment of the present invention, along a direction parallel to the plane where the driving back plate 10 is located, the cross-sectional area of ​​the groove 51 along a direction away from the driving back plate 10 tends to decrease.

[0062] In the specific implementation process, combined with Figure 4 and Figure 6 As shown, along the direction parallel to the plane where the driving back plate 10 is located, the cross-sectional area of ​​the groove 51 along the direction away from the driving back plate 10 tends to decrease. In this way, a nano pattern of a desired pattern can be effectively prepared through related processes such as photolithography and laser processes.

[0063] In the embodiment of the present invention, the anti-reflection unit 50 may be specifically configured in the following ways, but is not limited to the following ways.

[0064] In one of the exemplary embodiments, the anti-reflection portion 50 is arranged in a non-overlapping area between the opening of the pixel defining layer 30 and the opening of the shading portion 41, and the orthographic projection of the anti-reflection portion 50 on the driving backplane 10 and the orthographic projection of the shading portion 41 on the driving backplane 10 do not overlap with each other.

[0065] Combination Figure 4 and Figure 6As shown, the anti-reflection portion 50 is only disposed in the non-overlapping area between the opening of the pixel defining layer 30 and the opening of the light shielding portion 41. Accordingly, the orthographic projection of the anti-reflection portion 50 on the driving backplane 10 and the orthographic projection of the light shielding portion 41 on the driving backplane 10 do not overlap each other. In this way, while taking into account the light extraction efficiency of the light emitting layer 20 in the opening of the pixel defining layer 30, the light reflectivity of the corresponding area can be effectively reduced by the light shielding portion 41, thereby improving the display quality.

[0066] In one exemplary embodiment, the orthographic projection of the anti-reflection portion 50 on the driving backplane 10 and the orthographic projection of the light shielding portion 41 on the driving backplane 10 are arranged to overlap with each other.

[0067] Exemplarily, the anti-reflection portion 50 is located in the non-opening area of ​​the pixel defining layer 30. Exemplarily, the anti-reflection portion 50 extends from the edge of the light-emitting layer 20 to the area corresponding to the light-shielding portion 41. Accordingly, the positive projection of the anti-reflection portion 50 on the driving backplane 10 and the positive projection of the light-shielding portion 41 on the driving backplane 10 are arranged to overlap each other.

[0068] It should be noted that the display panel provided by the embodiment of the present invention may include other film layer structures in addition to the film layer structure mentioned above. Exemplarily, the display panel also includes a touch layer located on the side of the film away from the driving backplane 10, and the touch layer is located between the film encapsulation layer 60 and the color film layer 40, wherein the specific setting of the touch layer can be implemented with reference to the relevant technology. Exemplarily, the color film layer 40 also includes a planarization layer covering the shading portion 41 and the filter portion 42, and the display panel also includes a glue layer and a cover plate sequentially arranged on the side of the planarization layer away from the driving backplane 10. Exemplarily, the glue layer can be a transparent glue layer composed of an optically clear adhesive (OCA). Of course, the specific film layer of the display panel can also be set according to the actual application needs, which is not limited here.

[0069] Based on the same inventive concept, an embodiment of the present invention provides a display device, which includes:

[0070] A display panel as described in any one of the above.

[0071] Since the principle of solving the problem of the display device is similar to that of the aforementioned display panel, the implementation of the display device can refer to the implementation of the aforementioned display panel, and the repeated parts will not be repeated.

[0072] In the specific implementation process, the display device provided by the embodiment of the present invention can be any product or component with a display function, such as a mobile phone, a tablet computer, a television, a display, a laptop computer, a digital photo frame, a navigator, etc. Other essential components of the display device should be understood by ordinary technicians in the field, and will not be described in detail here, nor should they be used as limitations of the present invention.

[0073] Based on the same inventive concept, Figure 7 As shown, an embodiment of the present invention further provides a method for preparing a display panel, comprising:

[0074] S101: forming a pattern of a pixel definition layer on a driving backplane;

[0075] S102: forming a light-emitting layer in the opening of the pixel defining layer;

[0076] S103: forming an anti-reflection portion disposed around the light-emitting layer on a side of the opening of the pixel defining layer away from the light-emitting layer; the anti-reflection portion having a nano pattern for reducing light reflectivity;

[0077] S104: forming a color filter layer on the side of the light-emitting layer away from the driving backplane; the color filter layer comprises a shading portion and a filtering portion surrounded by the shading portion; the opening width of the shading portion is greater than the opening width of the pixel defining layer, and the orthographic projection of the light-emitting layer on the driving backplane completely falls within the area of ​​the orthographic projection of the filtering portion on the driving backplane.

[0078] Combine the following Figure 4 The specific implementation process of step S101 to step S104 is explained as follows:

[0079] First, a pattern of a pixel defining layer 30 is formed on the driving backplane 10; then, an anode layer (not shown in the figure) and a light-emitting layer 20 are sequentially formed in the opening of the pixel defining layer 30; then, a cathode layer 70 is vapor-deposited on the entire surface of the light-emitting layer 20 away from the driving backplane 10; then, a first inorganic encapsulation layer 61 is deposited on the surface of the cathode layer 70 away from the driving backplane 10; then, a photolithography process is used to atomize the surface of the first inorganic encapsulation layer 61 away from the driving backplane 10 to form a nano pattern for reducing light reflectivity, and the nano pattern is used to form an anti-reflection part 50, and the anti-reflection part 50 is arranged around the light-emitting layer 20. Then, an organic encapsulation layer 62 and a second inorganic encapsulation layer 63 are sequentially formed on the side of the first inorganic encapsulation layer 61 away from the driving backplane 10, thereby forming a thin film encapsulation layer 60 including the first inorganic encapsulation layer 61, the organic encapsulation layer 62 and the second inorganic encapsulation layer 63. Then, a pattern of the light shielding portion 41 is formed on the side of the second inorganic encapsulation layer 63 away from the driving backplane 10. Then, a filter portion 42 surrounded by the light shielding portion 41 is formed in the opening of the light shielding portion 41. Among them, the opening width of the light shielding portion 41 is greater than the opening width of the pixel defining layer 30, and the orthographic projection of the light emitting layer 20 on the driving backplane 10 completely falls within the area range of the orthographic projection of the filter portion 42 on the driving backplane 10. In this exemplary embodiment, the anti-reflection portion 50 is arranged in a non-overlapping area between the opening of the pixel defining layer 30 and the opening of the light shielding portion 41, and the orthographic projection of the anti-reflection portion 50 on the driving backplane 10 does not overlap with the orthographic projection of the light shielding portion 41 on the driving backplane 10.

[0080] Combine the following Figure 6 The display panel shown in FIG. 1A , the specific implementation process of step S101 to step S104 is explained as follows:

[0081] First, a pattern of a pixel defining layer 30 is formed on the driving backplane 10; then, an anode layer and a light-emitting layer 20 are sequentially formed in the opening of the pixel defining layer 30; then, a cathode layer 70 is vapor-deposited on the entire surface of the light-emitting layer 20 away from the driving backplane 10; then, a photolithography process is used to atomize the surface of the cathode layer 70 away from the driving backplane 10 to form a nano pattern for reducing light reflectivity, and the anti-reflection part 50 is formed by the nano pattern, and the anti-reflection part 50 is arranged around the light-emitting layer 20. Then, a whole layer of a first inorganic encapsulation layer 61, an organic encapsulation layer 62, and a second inorganic encapsulation layer 63 are sequentially deposited on the side of the cathode layer 70 away from the driving backplane 10, thereby forming a thin film encapsulation layer 60 including the first inorganic encapsulation layer 61, the organic encapsulation layer 62, and the second inorganic encapsulation layer 63. Then, a pattern of a light shielding part 41 is formed on the side of the second inorganic encapsulation layer 63 away from the driving backplane 10. Then, a filter portion 42 surrounded by the light shielding portion 41 is formed in the opening of the light shielding portion 41. The opening width of the light shielding portion 41 is greater than the opening width of the pixel defining layer 30, and the orthographic projection of the light emitting layer 20 on the driving backplane 10 completely falls within the region of the orthographic projection of the filter portion 42 on the driving backplane 10. In this exemplary embodiment, the anti-reflection portion 50 is disposed in a non-overlapping region between the opening of the pixel defining layer 30 and the opening of the light shielding portion 41, and the orthographic projection of the anti-reflection portion 50 on the driving backplane 10 does not overlap with the orthographic projection of the light shielding portion 41 on the driving backplane 10.

[0082] The embodiment of the present invention provides a display panel, a manufacturing method thereof and a display device, wherein the display panel includes a driving backplane 10, a light-emitting layer 20 located on the driving backplane 10, a pixel defining layer 30 for defining the light-emitting layer 20, a color filter layer 40 located on the side of the light-emitting layer 20 away from the driving backplane 10, and an anti-reflection portion 50 located between the light-emitting layer 20 and the color filter layer 40. In this way, the light reflectivity of the screen can be reduced to a certain extent through the color filter layer 40.

[0083] In addition, the color filter layer 40 includes a light shielding portion 41 and a filter portion 42 surrounded by the light shielding portion 41; wherein the opening width of the light shielding portion 41 is greater than the opening width of the pixel defining layer 30, and the orthographic projection of the light emitting layer 20 on the driving backplane 10 completely falls within the area of ​​the orthographic projection of the filter portion 42 on the driving backplane 10. In this way, it is ensured that all light from the light emitting layer 20 can be emitted from the opening of the pixel defining layer 30.

[0084] Moreover, the anti-reflection part 50 is located on the side of the opening of the pixel defining layer 30 away from the light emitting layer 20, and is arranged around the light emitting layer 20, and the anti-reflection part 50 has a nano pattern that reduces the light reflectivity. In this way, the light reflectivity of the display panel can be effectively reduced by the anti-reflection part 50 having a nano pattern that reduces the light reflectivity. In this way, while taking into account the light extraction efficiency of the light emitting layer 20, the light reflectivity of the entire display device is effectively reduced, thereby ensuring the display quality.

[0085] Although the preferred embodiments of the present invention have been described, those skilled in the art may make other changes and modifications to these embodiments once they have learned the basic creative concept. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments and all changes and modifications that fall within the scope of the present invention.

[0086] Obviously, those skilled in the art can make various changes and modifications to the present application without departing from the spirit and scope of the present application. Thus, if these modifications and variations of the present application fall within the scope of the claims of the present application and their equivalents, the present application is also intended to include these modifications and variations.

Claims

1. A display panel, characterized in that: include: A driving backplane, a light-emitting layer located on the driving backplane, a pixel defining layer for defining the light-emitting layer, a color filter layer located on a side of the light-emitting layer away from the driving backplane, and an anti-reflection portion located between the light-emitting layer and the color filter layer; Among them, the color filter layer includes a shading portion and a filtering portion surrounded by the shading portion; the opening width of the shading portion is greater than the opening width of the pixel defining layer, and the orthographic projection of the light-emitting layer on the driving backplane completely falls within the area of ​​the orthographic projection of the filtering portion on the driving backplane; the anti-reflection portion is located on the side of the opening of the pixel defining layer away from the light-emitting layer, and is arranged around the light-emitting layer, and the anti-reflection portion has a nano pattern for reducing light reflectivity.

2. The display panel according to claim 1, wherein: It also includes a thin film encapsulation layer located between the light-emitting layer and the color filter layer; at least part of the film layer in the thin film encapsulation layer is provided with the nano pattern on a surface on a side away from the driving backplane.

3. The display panel according to claim 2, wherein: The thin film encapsulation layer comprises a first inorganic encapsulation layer, an organic encapsulation layer and a second inorganic encapsulation layer which are sequentially arranged away from the driving backplane, and the surface of the first inorganic encapsulation layer on one side away from the driving backplane is provided with the nano pattern.

4. The display panel according to any one of claims 1 to 3, characterized in that: It also includes a cathode layer located on the side of the light-emitting layer away from the driving backplane; the surface of the cathode layer on the side away from the driving backplane is provided with the nano pattern.

5. The display panel according to claim 4, wherein: The nano pattern is arranged in a groove.

6. The display panel according to claim 5, wherein: Along a direction perpendicular to the plane where the driving back plate is located, a cross-sectional shape of the groove is at least one of a triangle, a rectangle, a trapezoid, and a diamond.

7. The display panel according to claim 5, wherein: Along a direction parallel to the plane where the driving back plate is located, the cross-sectional area of ​​the groove along a direction away from the driving back plate tends to decrease.

8. The display panel according to any one of claims 1 to 3 and 5 to 7, characterized in that: The anti-reflection portion is disposed in a non-overlapping area between an opening of the pixel defining layer and an opening of the light shielding portion, and an orthographic projection of the anti-reflection portion on the driving backplane does not overlap with an orthographic projection of the light shielding portion on the driving backplane.

9. The display panel according to any one of claims 1 to 3 and 5 to 7, characterized in that: The orthographic projection of the anti-reflection portion on the driving backplane and the orthographic projection of the light shielding portion on the driving backplane are arranged to overlap with each other.

10. A display device, characterized in that: include: A display panel as claimed in any one of claims 1 to 9.

11. A method for preparing a display panel, characterized in that: include: forming a pattern of a pixel defining layer on a driving backplane; forming a light-emitting layer in the opening of the pixel defining layer; An anti-reflection portion is formed on a side of the opening of the pixel defining layer away from the light-emitting layer and arranged around the light-emitting layer; the anti-reflection portion has a nano pattern for reducing light reflectivity; forming a color filter layer on a side of the light-emitting layer away from the driving backplane; The color filter layer includes a light shielding portion and a light filtering portion surrounded by the light shielding portion; The opening width of the light shielding portion is greater than the opening width of the pixel defining layer, and the orthographic projection of the light emitting layer on the driving backplane completely falls within the region of the orthographic projection of the light filtering portion on the driving backplane.

Images