Display panel and manufacturing method thereof, and display device

Abstract

The present application discloses a display panel, a manufacturing method thereof, and a display device. The display panel of one embodiment of the present application includes: a substrate; a source-drain metal layer formed on the substrate away from the light-emitting side; a color filter layer formed on the source-drain metal layer away from the substrate; a light-emitting unit layer formed on the color filter layer away from the substrate side, the light-emitting unit layer including a first electrode layer, a pixel defining layer, a light-emitting layer, and a second electrode layer stacked in sequence on the color filter layer, wherein the color filter layer includes at least one lens unit to converge the light emitted by the light-emitting layer and emit it from the light-emitting side. The embodiment of the present application improves the color purity and light-emitting efficiency by providing a color filter layer with a lens unit between the source-drain metal layer and the light-emitting unit layer on the substrate, so that the light generated by the light-emitting layer can be converged and emitted from the light-emitting side.

Description

Technical Field

[0001] The present application 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] Organic light emitting devices (OLED) have the advantages of being able to produce surface light sources and soft light emission. In recent years, their application in the field of automotive lighting has become increasingly popular. OLED display devices are mainly divided into two types according to the light emission direction: bottom-emitting OLED display devices and top-emitting display devices. Among them, top-emitting OLED display devices are display devices in which light is emitted from the top of the device, and bottom-emitting devices are display devices in which light is emitted from the substrate. For bottom-emitting OLED automotive lighting products, the color purity and front light emission rate of the automotive lighting are the most important indicators.

[0003] Therefore, it is necessary to provide a display product with higher color purity and front light extraction rate. Summary of the invention

[0004] In order to solve at least one of the above problems, the present application provides a display panel in a first aspect, including:

[0005] substrate;

[0006] A source-drain metal layer is formed on the substrate away from the light-emitting side;

[0007] A color filter layer is formed on the side of the source and drain metal layer away from the substrate;

[0008] A light-emitting unit layer is formed on the side of the color filter layer away from the substrate, and the light-emitting unit layer includes a first electrode layer, a pixel defining layer, a light-emitting layer and a second electrode layer which are sequentially stacked on the color filter layer.

[0009] The color film layer includes at least one lens unit to converge the light emitted by the light-emitting layer and emit it from the light-emitting side.

[0010] In some optional embodiments,

[0011] The color film layer is a lens module composed of multiple lens units, each of which is a convex lens arranged on a substrate.

[0012] The first electrode layer is arranged on the surface of the color filter layer away from the substrate, and the refractive index of the color filter layer is greater than the refractive index of the first electrode layer.

[0013] In some optional embodiments, the color film layer is a lens module composed of a plurality of lens units, each of which is a concave lens disposed on a substrate.

[0014] The first electrode layer is arranged on the surface of the color filter layer away from the substrate, and the refractive index of the color filter layer is smaller than the refractive index of the first electrode layer.

[0015] In some optional embodiments, the pixel defining layer defines a plurality of light emitting openings.

[0016] The color filter layer includes a plurality of through holes, and the first electrode layer is electrically connected to the source and drain metal layer through the through holes.

[0017] The color film area between the through holes includes a lens unit area and a flat area. The lens unit area includes a plurality of lens units.

[0018] The orthographic projection of the lens unit area on the substrate at least partially covers the orthographic projection of the side wall of the pixel definition layer on the substrate, and the flat area corresponds to the light-emitting opening.

[0019] In some optional embodiments,

[0020] The lens unit area includes a plurality of convex lenses arranged on the substrate, and

[0021] The first electrode layer is arranged on the color filter layer away from the substrate surface, and the refractive index of the color filter layer is greater than the refractive index of the first electrode layer.

[0022] In some optional embodiments,

[0023] The lens unit area includes a plurality of concave lenses arranged on the substrate, and

[0024] The first electrode layer is arranged on the color filter layer away from the substrate surface, and the refractive index of the color filter layer is smaller than the refractive index of the first electrode layer.

[0025] In some optional embodiments,

[0026] The luminescent color of the luminescent layer is red or yellow, and the color of the color film layer is the same as that of the luminescent layer, or

[0027] The light-emitting layer comprises a plurality of color light-emitting areas arranged at intervals, the colors of the light-emitting layer comprise red, green and yellow, and the color film layer comprises color film areas of colors corresponding to the color light-emitting areas.

[0028] In some optional embodiments, the anode is formed in the first electrode layer, and the cathode is formed in the second electrode layer.

[0029] A second aspect of the present application provides a display device, comprising the display panel described above.

[0030] A third aspect of the present application provides a method for manufacturing the display panel described above, comprising:

[0031] providing a substrate;

[0032] Forming a source-drain metal layer on the substrate away from the light-emitting side;

[0033] forming a color filter layer on the side of the source and drain metal layer away from the substrate;

[0034] A light-emitting unit layer is formed on the side of the color filter layer away from the substrate, wherein the light-emitting unit layer includes a first electrode layer, a pixel defining layer, a light-emitting layer, and a second electrode layer which are sequentially stacked on the color filter layer.

[0035] The color film layer includes at least one lens unit to converge the light emitted by the light-emitting layer and emit it from the light-emitting side.

[0036] The beneficial effects of this application are as follows:

[0037] In response to the current existing problems, the present application develops a display panel and a manufacturing method thereof, as well as a display device, and provides a color filter layer between the source-drain metal layer and the light-emitting unit layer on the substrate, and the color filter layer includes at least one lens unit, so that the color filter unit can be used to converge the light generated by the light-emitting layer in the light-emitting unit layer and emit it from the light-emitting side of the display panel, thereby effectively improving the light-emitting efficiency of the display panel; in addition, by passing the light from the light-emitting layer through the color filter layer before it is emitted, the color purity of the emitted light can be improved, thereby further improving the display quality, and has broad application prospects. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] The specific implementation methods of the present application are further described in detail below in conjunction with the accompanying drawings.

[0039] Figure 1 A schematic cross-sectional view showing a display panel according to an embodiment of the present application;

[0040] Figure 2 A schematic cross-sectional view showing a display panel according to another embodiment of the present application;

[0041] Figure 3 A schematic cross-sectional view showing a display panel according to another embodiment of the present application;

[0042] Figure 4 A schematic cross-sectional view showing a display panel according to another embodiment of the present application;

[0043] Figure 5 A schematic cross-sectional view showing a display panel according to another embodiment of the present application;

[0044] Figure 6 A schematic flow chart showing a method for manufacturing a display panel according to an embodiment of the present application;

[0045] Figure 7-10 A schematic flow chart showing the steps of manufacturing each layer structure of a display panel. DETAILED DESCRIPTION

[0046] In order to more clearly illustrate the present application, the present application is further described below in conjunction with the embodiments and drawings. Similar components in the drawings are represented by the same or similar reference numerals. It should be understood by those skilled in the art that the content specifically described below is illustrative rather than restrictive, and should not be used to limit the scope of protection of the present application.

[0047] It should be noted that the words “having”, “including”, “comprising”, etc. described in this application are all open-ended meanings, that is, when describing that a module “has”, “including”, or “comprising” a first element, a second element, and / or a third element, it means that the module includes other elements in addition to the first element, the second element, and / or the third element. In addition, ordinal numbers such as “first”, “second”, and “third” in this application are not intended to limit a specific order, but are only used to distinguish various parts.

[0048] The terms “on”, “formed on” and “disposed on” as used in the present application may mean that one layer is directly formed or disposed on another layer, or may mean that one layer is indirectly formed or disposed on another layer, i.e., there are other layers between the two layers.

[0049] An embodiment of the present application provides a display panel, including:

[0050] substrate;

[0051] A source-drain metal layer is formed on the substrate away from the light-emitting side;

[0052] A color filter layer is formed on the side of the source and drain metal layer away from the substrate;

[0053] A light-emitting unit layer is formed on the color filter layer away from the substrate, the light-emitting unit layer comprising a first electrode layer, a pixel defining layer, a light-emitting layer and a second electrode layer stacked in sequence on the color filter layer,

[0054] The color film layer includes at least one lens unit to converge the light emitted by the light-emitting layer and emit it from the light-emitting side.

[0055] In this embodiment, a color filter layer is provided between the source-drain metal layer and the light-emitting unit layer on the substrate, and the color filter layer includes at least one lens unit, so that the color filter unit can be used to converge the light generated by the light-emitting layer in the light-emitting unit layer and emit it from the light-emitting side of the display panel, thereby effectively improving the light-emitting efficiency of the display panel; in addition, by allowing the light from the light-emitting layer to pass through the color filter layer before being emitted, the color purity of the emitted light can be improved, thereby further improving the display quality.

[0056] In a specific embodiment, referring to Figure 1As shown, the display panel includes a substrate 100 and a source-drain metal layer 101 formed on the substrate 100 away from the light-emitting side. The substrate 100 may be a flexible substrate. When the substrate 100 is a flexible substrate, a glass cover plate 102 may also be included on the light-emitting side of the substrate 100 to provide protection on the light-emitting side. However, the present application does not specifically limit the properties of the substrate 100. The substrate 100 may also be rigid. When the substrate 100 is a rigid substrate, there is no need to add a glass cover plate 102 on the light-emitting side of the substrate 100. The source-drain metal layer 101 may be the source and drain of the transistor in the driving circuit, or may be a metal connection line electrically connected to the source and drain of the transistor in the driving circuit. The material of the source-drain metal layer 101 may be: copper, aluminum, silver, molybdenum, neodymium, niobium, titanium, and other metals or alloy materials, and may be a single layer or a multilayer.

[0057] Reference Figure 1 As shown, the light-emitting unit layer includes a first electrode layer 104, a pixel defining layer 105, a light-emitting layer 106, and a second electrode layer 107 which are stacked in sequence. In an embodiment of the present application, the display panel is a bottom-emitting display panel, the first electrode layer 104 is used as a transmissive electrode, and the second electrode layer 107 is used as a reflective electrode. The material of the first electrode layer 104 can be a transparent conductive material with high transmittance such as ITO and IZO, and the second electrode layer 107 can be a highly reflective metal material such as Ag. Optionally, the first electrode layer 104 is used as an anode and the second electrode layer 107 is used as a cathode, that is, the anode is arranged in the first electrode layer 104, and the cathode is arranged in the second electrode layer 107. However, those skilled in the art should understand that this is not restrictive, and the cathode can also be arranged in the first electrode layer 104 and the anode in the second electrode layer 107 when necessary. In addition, this example shows that the second electrode layer 107 only covers the light-emitting layer 106, but this is not restrictive. In some embodiments, the second electrode layer 107 can also cover the entire surface as a reflective electrode, that is, covering the light-emitting layer 106 and the pixel defining layer, which will not be repeated here.

[0058] In particular, in the present application, the display panel includes: a color filter layer 103 formed on the side of the source-drain metal layer 101 away from the substrate, and the color filter layer 103 is formed between the source-drain metal layer 101 and the light-emitting unit layer. The color filter layer 103 includes at least one lens unit 113 to converge the light emitted by the light-emitting layer 106 in the light-emitting unit layer and emit it from the light-emitting side.

[0059] Specifically, refer to Figure 1As shown, the color filter layer 103 is a lens module composed of a plurality of lens units 113, and each lens unit is a convex lens disposed on the substrate 100. The first electrode layer 104 is disposed on the surface of the color filter layer 103 away from the substrate 100, and the refractive index of the color filter layer 103 is greater than the refractive index of the first electrode layer 104. The material of the color filter layer 103 is generally an organic material, and those skilled in the art can understand that the refractive index of the color filter layer 103 can be adjusted by adjusting the concentration of particles added to the color filter layer 103 to make it greater than the refractive index of the first electrode layer 104, which will not be described in detail herein.

[0060] Reference Figure 1 As shown, by configuring the lens unit in the color filter layer 103 to be a convex lens disposed on the substrate 100 and configuring the refractive index of the color filter layer 103 to be greater than the refractive index of the first electrode layer 104 directly in contact with it, the light generated by the light-emitting layer 106 is refracted at the interface between the two when it is incident from the first electrode layer 104 with a lower refractive index to the color filter layer 103 with a higher refractive index, and the refraction angle is greater than the incident angle. The convex lens can significantly amplify this refraction process and produce a stronger convergence effect on the light, so that the obliquely emitted light can be emitted frontally at a small angle, thereby improving the light extraction efficiency.

[0061] In addition, in the embodiment of the present application, the color of the color filter layer 103 should be consistent with the luminous color of the corresponding luminous layer.

[0062] Optionally, if the display panel is used as a taillight, the luminous color of the display panel luminous layer 106 is red, and the color of the color filter layer 103 is also the same red as the luminous layer 106. Through this arrangement, stray light can be filtered and the color purity of the light emitted by the display panel can be increased.

[0063] Optionally, if the display panel is used as a fog lamp, the luminous color of the display panel luminous layer 106 is yellow, and the color of the color filter layer 103 is also the same yellow as the luminous layer 106. Through this arrangement, stray light can be filtered and the color purity of the light emitted by the display panel can be increased.

[0064] Further optionally, referring to Figure 2 As shown, in some cases, the display panel can be used as a lighting lamp, and the display panel emits white light, and the light-emitting layer 106 is a red light-emitting layer 126, a yellow light-emitting layer 136, and a green light-emitting layer 146 arranged alternately, and the color filter layer 103 is also a red color filter layer 123, a yellow color filter layer 133, and a green color filter layer 143 that are consistent with the light-emitting layer 106. Through this arrangement, stray light can be filtered, so that the color purity of the light emitted by the corresponding light-emitting layer can be correspondingly improved, thereby increasing the color purity of the emitted white light.

[0065] It should also be noted that the present application is not intended to limit the specific use and luminous color of the display panel. If necessary, the luminous layer can also emit green light alone. In this case, in order to increase the color purity of the emitted light, the color of the color filter layer can be green. In addition, the present application is not intended to limit the use of the display panel to a single purpose. That is, if the display panel needs to have multiple functions at the same time, such as fog lights and lighting lights, the luminous layer in the display panel can be divided into different functional areas. In this case, one area emits yellow light and another area emits white light. The color of the color filter layer only needs to be consistent with the color of the corresponding luminous layer, and no further details will be given here.

[0066] In some optional embodiments, the effect of converging the emitted light of the light-emitting layer can also be achieved by changing the structure of the color filter layer and its relationship with the first motor layer.

[0067] Specifically, refer to Figure 3 As shown, the color filter layer 103-1 is a lens module composed of a plurality of lens units 113, and each lens unit is a concave lens disposed on the substrate 100. The first electrode layer 104-1 is disposed on the surface of the color filter layer 103-1 away from the substrate 100, and the refractive index of the color filter layer 103 is less than the refractive index of the first electrode layer 104-1. Similarly, the material of the color filter layer 103-1 is generally an organic material, and those skilled in the art can understand that the refractive index of the color filter layer 103 can be adjusted by adjusting the concentration of the particles added to the color filter layer 103, so that it is less than the refractive index of the first electrode layer 104, and no further details are given here.

[0068] like Figure 3 As shown, by setting the lens unit in the color filter layer 103-1 as a concave lens formed on the substrate 100 and setting the refractive index of the color filter layer 103-1 to be greater than the refractive index of the first electrode layer 104-1 directly in contact with it, the light generated by the light-emitting layer 106-1 is refracted at the interface between the two when it is incident from the first electrode layer 104-1 with a lower refractive index to the color filter layer 103-1 with a higher refractive index. The inherent refraction angle of the refraction is smaller than the incident angle, and the tendency of the refraction after refraction is divergent. Due to the divergent effect of the concave lens, the light with the divergent tendency is diverged, so that the color filter layer produces a converging effect on the light emitted from the light-emitting layer as a whole, so that the obliquely emitted light can be emitted frontally at a small angle, thereby improving the light output efficiency.

[0069] In addition, in this embodiment, the color of the color filter layer 103 - 1 should also be consistent with the luminescent color of the corresponding luminescent layer.

[0070] Optionally, if the display panel is used as a taillight, the luminous color of the display panel luminous layer 106-1 is red, and the color of the color filter layer 103-1 is also the same red as the luminous layer 106-1. This setting can filter stray light and increase the color purity of the light emitted by the display panel.

[0071] Optionally, if the display panel is used as a fog lamp, the luminous color of the display panel luminous layer 106-1 is yellow, and the color of the color filter layer 103-1 is also the same yellow as the luminous layer 106-1. This setting can filter stray light and increase the color purity of the light emitted by the display panel.

[0072] Further optionally, in some cases, the display panel can be used as a lighting lamp, and the display panel emits white light, and the luminous colors of the luminous layer 106-1 are red, yellow and green arranged alternately, and the color of the color filter layer 103-1 is also red, yellow and green corresponding to the luminous layer 106-1. Through this setting, stray light can be filtered, so that the color purity of the light emitted by the corresponding luminous layer can be correspondingly improved, thereby increasing the color purity of the emitted white light.

[0073] However, considering Figure 1 , Figure 2 and Figure 3 In the embodiment shown, because the color filter layer is configured as a lens module composed of multiple lens units, the first electrode stacked on the color filter layer is also an uneven film structure. When the emitting interface of the light emitting layer is uneven, the uniformity of the emitted light may be affected.

[0074] When the uniformity of the light emitted from the display panel needs to be considered, another optional embodiment of the present application proposes the following structure.

[0075] Specifically, in the present application, the pixel definition layer 105 in the light emitting unit layer defines a plurality of light emitting openings, and the light emitting layer 106-2 is formed in the light emitting openings. The color filter layer 104-2 includes a plurality of through holes, and the first electrode layer 104-2 is electrically connected to the source-drain metal layer 101 through the through holes.

[0076] In particular, in this embodiment, the color film area between the through holes includes a lens unit area 103' and a flat area 103", the lens unit area 103' includes a plurality of lens units 113; the orthographic projection of the lens unit area 103' on the substrate 100 at least partially covers the orthographic projection of the side wall of the pixel defining layer 105 on the substrate 100, and the flat area 103" corresponds to the light-emitting opening.

[0077] Specifically, the lens unit area 103 ′ includes a plurality of convex lenses disposed on the substrate 100 , and the first electrode layer 104 - 2 is disposed on the color filter layer 103 - 2 away from the surface of the substrate 100 , and the refractive index of the color filter layer 103 - 2 is greater than the refractive index of the first electrode layer 104 - 2 .

[0078] By setting a lens unit area 103' including a plurality of convex lenses, the orthographic projection of which at least partially covers the orthographic projection of the side wall of the pixel defining layer 105 on the substrate 100, and the light-emitting opening corresponds to the flat area 103", the lens unit of the convex lens structure can be utilized, so that the light diverged from the light-emitting layer 106-2 through the side wall of the pixel defining layer is converged by the convex lens and then emitted, thereby improving the light emission efficiency of the display panel. At the same time, the flat area 103'' corresponding to the light-emitting opening makes the light-emitting layer 106-2 also flat, thereby ensuring the uniformity of the light emitted from the light-emitting layer 106-2.

[0079] In addition, in this embodiment, the color of the color filter layer 103 - 2 should also be consistent with the luminescent color of the corresponding luminescent layer.

[0080] Optionally, if the display panel is used as a taillight, the luminous color of the display panel luminous layer 106-1 is red, and the color of the color filter layer 103-2 is also the same red as the luminous layer 106-2. Through this setting, stray light can be filtered and the color purity of the light emitted by the display panel can be increased.

[0081] Optionally, if the display panel is used as a fog lamp, the luminous color of the display panel luminous layer 106-2 is yellow, and the color of the color filter layer 103-2 is also the same yellow as the luminous layer 106-2. This setting can filter stray light and increase the color purity of the light emitted by the display panel.

[0082] Further optionally, in some cases, the display panel can be used as a lighting lamp, and the display panel emits white light, and the luminous colors of the luminous layer 106-2 are red, yellow and green arranged alternately, and the color of the color filter layer 103-2 is also red, yellow and green corresponding to the luminous layer 106-2. Through this setting, stray light can be filtered, so that the color purity of the light emitted by the corresponding luminous layer can be correspondingly improved, thereby increasing the color purity of the emitted white light.

[0083] In another alternative embodiment, referring to Figure 5 As shown, the pixel definition layer 105 in the light emitting unit layer defines a plurality of light emitting openings, and the light emitting layer 106-3 is formed in the light emitting openings. The color filter layer 104-3 includes a plurality of through holes, and the first electrode layer 104-3 is electrically connected to the source-drain metal layer 101 through the through holes.

[0084] In particular, in this embodiment, the color film area between the through holes includes a lens unit area 103' and a flat area 103", the lens unit area 103' includes a plurality of lens units 113; the orthographic projection of the lens unit area 103' on the substrate 100 at least partially covers the orthographic projection of the side wall of the pixel defining layer 105 on the substrate 100, and the flat area 103" corresponds to the light-emitting opening.

[0085] Specifically, the lens unit area 103 ′ includes a plurality of concave lenses disposed on the substrate 100 , and the first electrode layer 104 - 3 is disposed on the color filter layer 103 - 3 away from the surface of the substrate 100 , and the refractive index of the color filter layer 103 - 2 is greater than that of the first electrode layer 104 - 3 .

[0086] By setting a lens unit area 103' including a plurality of concave lenses, the orthographic projection of which at least partially covers the orthographic projection of the side wall of the pixel defining layer 105 on the substrate 100, and the light-emitting opening corresponds to the flat area 103", it is possible to utilize a lens unit with a convex lens structure so that the light diverged from the side wall of the light-emitting layer 106-3 through the pixel defining layer is converged by the concave lens and then emitted, thereby improving the light emission efficiency of the display panel. At the same time, the flat area 103'' corresponding to the light-emitting opening makes the light-emitting layer 106-3 also flat, thereby ensuring the uniformity of the emitted light from the light-emitting layer 106-3.

[0087] In addition, in this embodiment, the color of the color filter layer 103 - 3 should also be consistent with the luminescent color of the corresponding luminescent layer. The specific method is similar to the above embodiment and will not be repeated here.

[0088] Based on the same inventive concept, Figure 6 As shown, an embodiment of the present application further provides a method for manufacturing the display panel described in the above embodiment, comprising:

[0089] S1. Provide a substrate;

[0090] S2, forming a source-drain metal layer on the substrate away from the light-emitting side;

[0091] S3, forming the color filter layer on the side of the source and drain metal layer away from the substrate;

[0092] S4, forming a light-emitting unit layer on the side of the color filter layer away from the substrate, wherein the light-emitting unit layer includes the first electrode layer, the pixel defining layer, the light-emitting layer and the second electrode layer which are sequentially stacked on the color filter layer,

[0093] The color film layer includes at least one lens unit to converge the light emitted by the light-emitting layer and emit it from the light-emitting side.

[0094] In this embodiment, a color filter layer is formed between the source-drain metal layer and the light-emitting unit layer on the substrate, and the color filter layer includes at least one lens unit, so that the color filter unit can be used to converge the light generated by the light-emitting layer in the light-emitting unit layer and emit it from the light-emitting side of the display panel, thereby effectively improving the light-emitting efficiency of the display panel; in addition, by allowing the light from the light-emitting layer to pass through the color filter layer before being emitted, the color purity of the emitted light can be improved, thereby further improving the display quality.

[0095] Specifically, refer to Figures 7 to 10 As shown, the following describes the production process with reference to the accompanying drawings Figure 1 An exemplary method of displaying a panel is shown.

[0096] Reference Figure 7 As shown, in step S2, a source-drain metal layer 101 is formed on the substrate 100 provided in step S1. The substrate 100 can be a flexible substrate or a rigid substrate. In this example, the substrate 100 is a flexible substrate, and the substrate can be pre-bonded to the glass cover plate 102, and the glass cover plate is used to provide rigid support. The material of the source-drain metal layer 101 can be: copper, aluminum, silver, molybdenum, neodymium, niobium, titanium, and other metals or alloy materials, and can be a single layer or a multilayer. Specifically, the source-drain metal layer 101 can be formed by sputtering the source-drain metal layer material on the substrate 100 and patterning it. The source-drain metal layer 101 can drive the source and drain of the transistor in the circuit, or be a metal connecting line electrically connected to the source and drain, and is used to provide an electrical signal to the first electrode of each light-emitting device in the first electrode layer in the light-emitting unit layer.

[0097] Of course, those skilled in the art should understand that there are other layer structures of the driving circuit between the substrate 100 and the source-drain metal layer 101 , which will not be described in detail herein.

[0098] Reference Figure 8 As shown, in step S3, a color filter layer 103 is formed on the side of the source-drain metal layer 101 away from the substrate. Specifically, a color filter material layer can be first formed on the source-drain metal layer 101 by a coating process, and then a color filter layer having a plurality of convex lens-shaped lens units can be formed by a nano-imprinting method. Afterwards, a plurality of through holes are formed in the color filter layer 103 by a photolithography process to expose a portion of the source-drain metal layer 101.

[0099] Reference Fig. 9 As shown, in step S4, a first electrode layer 104 is formed on the side of the color filter layer 103 away from the substrate. The material of the first electrode layer 104 can be a transparent metal oxide material such as ITO and IZO, and the first electrode layer 104 is directly formed on the surface of the color filter layer 103 away from the substrate. The refractive index of the first electrode layer 104 is less than the refractive index of the color filter layer 103.

[0100] Reference Fig.10As shown, a pixel defining layer 105 is formed on the first electrode layer 104. Specifically, the pixel defining layer 105 defining the light-emitting opening can be formed by forming a pixel defining material layer of an organic material and patterning it. Next, a light-emitting layer 106 is formed in the light-emitting opening by printing, spraying, etc. The material of the light-emitting layer 106 is the same as that of the corresponding color filter layer 103.

[0101] Then, a second electrode layer 107 is formed on the light emitting layer 106. Figure 1 In this example, the second electrode layer 107 is shown as a pattern that only covers the light-emitting layer 106, but the present application is not limited thereto. The entire second electrode layer 107 can also be formed by sputtering the second electrode material covering the pixel defining layer 105 and the light-emitting layer without patterning, which will not be described in detail here. Of course, in actual display panel products, one or more encapsulation layers may be further included on the second electrode layer to provide protection, which will not be described in detail here.

[0102] Based on the same inventive concept, the present application also provides a display device, and the display panel includes the display panel described in the above embodiment.

[0103] Since the display panel included in the display device provided in the embodiment of the present application corresponds to the display panels provided in the above-mentioned embodiments, the previous implementation manner is also applicable to the present embodiment and will not be described in detail in the present embodiment.

[0104] In this embodiment, the display device can be a vehicle-mounted lighting device, but is not limited to this. The display device can also be any bottom-emitting display panel such as a mobile phone, a tablet computer, a television, a monitor, a laptop computer, a vehicle-mounted display, a digital photo frame or a navigation system. By loading the above display panel, the display device can improve the light output efficiency and the light output color purity, and has higher competitiveness.

[0105] In response to the current existing problems, the present application develops a display panel and a manufacturing method thereof, as well as a display device, and provides a color filter layer between the source-drain metal layer and the light-emitting unit layer on the substrate, and the color filter layer includes at least one lens unit, so that the color filter unit can be used to converge the light generated by the light-emitting layer in the light-emitting unit layer and emit it from the light-emitting side of the display panel, thereby effectively improving the light-emitting efficiency of the display panel; in addition, by passing the light from the light-emitting layer through the color filter layer before it is emitted, the color purity of the emitted light can be improved, thereby further improving the display quality, and has broad application prospects.

[0106] Obviously, the above embodiments of the present application are merely examples for clearly illustrating the present application, and are not limitations on the implementation methods of the present application. For ordinary technicians in the relevant field, other different forms of changes or modifications can be made based on the above description. It is impossible to list all the implementation methods here. All obvious changes or modifications derived from the technical solution of the present application are still within the scope of protection of the present application.

Claims

1. A display panel, characterized in that: include: substrate; A source-drain metal layer is formed on the substrate away from the light-emitting side; A color filter layer formed on the side of the source / drain metal layer away from the substrate; A light-emitting unit layer is formed on the color filter layer away from the substrate, wherein the light-emitting unit layer includes a first electrode layer, a pixel defining layer, a light-emitting layer and a second electrode layer which are sequentially stacked on the color filter layer. The color film layer includes at least one lens unit to converge the light emitted by the light-emitting layer and emit it from the light-emitting side. The pixel defining layer defines a plurality of light emitting openings, The color filter layer includes a plurality of through holes, and the first electrode layer is electrically connected to the source-drain metal layer through the through holes. The color film area between the through holes includes a lens unit area and a flat area, and the lens unit area includes a plurality of lens units. The orthographic projection of the lens unit area on the substrate at least partially covers the orthographic projection of the side wall of the pixel definition layer on the substrate, and the flat area corresponds to the light-emitting opening.

2. The display panel according to claim 1, characterized in that: The color film layer is a lens module composed of a plurality of lens units, each of which is a convex lens arranged on the substrate. The first electrode layer is disposed on a surface of the color filter layer away from the substrate, and the refractive index of the color filter layer is greater than the refractive index of the first electrode layer.

3. The display panel according to claim 1, characterized in that: The color film layer is a lens module composed of a plurality of lens units, each of which is a concave lens disposed on the substrate. The first electrode layer is disposed on a surface of the color filter layer away from the substrate, and the refractive index of the color filter layer is smaller than the refractive index of the first electrode layer.

4. The display panel according to claim 1, characterized in that: in The lens unit area includes a plurality of convex lenses arranged on the substrate, and The first electrode layer is disposed on a surface of the color filter layer away from the substrate, and the refractive index of the color filter layer is greater than the refractive index of the first electrode layer.

5. The display panel according to claim 1, characterized in that: in The lens unit area includes a plurality of concave lenses disposed on the substrate, and The first electrode layer is disposed on a surface of the color filter layer away from the substrate, and the refractive index of the color filter layer is smaller than the refractive index of the first electrode layer.

6. The display panel according to claim 1, characterized in that: The luminescent color of the luminescent layer is red or yellow, and the color of the color filter layer is the same as the color of the luminescent layer, or The light-emitting layer includes a plurality of color light-emitting areas arranged at intervals, the colors of the light-emitting layer include red, green and yellow, and the color filter layer includes color filter areas of colors corresponding to the color light-emitting areas.

7. The display panel according to claim 1, characterized in that: An anode is formed in the first electrode layer, and a cathode is formed in the second electrode layer.

8. A display device, characterized in that: The invention comprises a display panel according to any one of claims 1 to 7.

9. A method for manufacturing a display panel according to any one of claims 1 to 7, characterized in that: include: providing the substrate; Forming the source-drain metal layer on the substrate away from the light-emitting side; forming the color filter layer on the side of the source / drain metal layer away from the substrate; The light-emitting unit layer is formed on the side of the color filter layer away from the substrate, and the light-emitting unit layer includes the first electrode layer, the pixel defining layer, the light-emitting layer and the second electrode layer which are sequentially stacked on the color filter layer. Wherein, the color filter layer includes at least one lens unit to converge the light emitted by the light-emitting layer and emit it from the light-emitting side.

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