Display panel and display device

Abstract

Embodiments of the present disclosure disclose a display panel and a display device. The display panel comprises a light emitting device layer and a color film layer which are sequentially stacked on a substrate; the light emitting device layer comprises an array of light emitting functional layers, and each light emitting functional layer comprises a plurality of sub-light emitting layers which are sequentially stacked; the color film layer comprises an array of first color filter layers, second color filter layers and third color filter layers; the sub-light emitting layer closest to the color film layer among the plurality of sub-light emitting layers is a first color sub-light emitting layer; there is a first overlapping area between the first color filter layer and the second color filter layer adjacent to the first color filter layer, and there is a second overlapping area between the first color filter layer and the third color filter layer adjacent to the first color filter layer; the area of the orthographic projection of the first overlapping area on the substrate and the area of the orthographic projection of the second overlapping area on the substrate are respectively greater than the area of the orthographic projection of the overlapping area between the second color filter layer and the third color filter layer adjacent to the second color filter layer on the substrate.

Description

TECHNICAL FIELD

[0001] The present disclosure relates to the technical field of display. More particularly, it relates to a display panel and a display device. BACKGROUND

[0002] At present, in the tandem structure of micro organic light emitting diode (Micro OLED) for example, there is a problem of color cast caused by color stringing of adjacent sub-pixels. SUMMARY

[0003] The present disclosure aims to provide a display panel and a display device to solve at least one of the problems in the prior art.

[0004] To achieve the above-mentioned purpose, the present disclosure adopts the following technical solutions:

[0005] The first aspect of the present disclosure provides a display panel, comprising a substrate and a driving circuit layer, a light emitting device layer, an encapsulation layer and a color filter layer which are sequentially stacked on the substrate;

[0006] The light emitting device layer comprises an array of light emitting functional layers, and the light emitting functional layers comprise a plurality of sub-light emitting layers which are sequentially stacked;

[0007] The color filter layer comprises an array of first color filter layers, second color filter layers and third color filter layers, and the orthographic projection of one first color filter layer on the substrate covers the orthographic projection of one light emitting layer functional layer on the substrate, the orthographic projection of one second color filter layer on the substrate covers the orthographic projection of one light emitting layer functional layer on the substrate, and the orthographic projection of one third color filter layer on the substrate covers the orthographic projection of one light emitting layer functional layer on the substrate;

[0008] Among the plurality of sub-light emitting layers which are sequentially stacked, the sub-light emitting layer closest to the color filter layer is a first color sub-light emitting layer, there is a first overlapping area between the first color filter layer and the second color filter layer adjacent thereto, there is a second overlapping area between the first color filter layer and the third color filter layer adjacent thereto, and the orthographic projection area of the first overlapping area on the substrate and the orthographic projection area of the second overlapping area on the substrate are respectively greater than the orthographic projection area of the overlapping area between the second color filter layer and the third color filter layer adjacent thereto on the substrate.

[0009] Optionally, a projection of the first overlapping region on the substrate is located in a gap between adjacent light-emitting functional layers in a projection of the substrate, and a projection of the second overlapping region on the substrate is located in a gap between adjacent light-emitting functional layers in a projection of the substrate.

[0010] Optionally, a projection of the first overlapping region on the substrate coincides with a gap between adjacent light-emitting functional layers in a projection of the substrate, and a projection of the second overlapping region on the substrate coincides with a gap between adjacent light-emitting functional layers in a projection of the substrate.

[0011] Optionally, the first color, the second color, and the third color are one of red, green, and blue, respectively.

[0012] Optionally, the plurality of sub-light-emitting layers arranged in sequence includes a second color and a third color mixed sub-light-emitting layer and a first color sub-light-emitting layer arranged in sequence.

[0013] Optionally, a cross section of the first color filter layer is a right trapezoid, and cross sections of the second color filter layer and the third color filter layer adjacent to the first color filter layer are inverted trapezoids, respectively.

[0014] Optionally, a cross section of the first color filter layer is an inverted trapezoid, and cross sections of the second color filter layer and the third color filter layer adjacent to the first color filter layer are right trapezoids, respectively.

[0015] Optionally, a thickness of the first color filter layer is greater than thicknesses of the second color filter layer and the third color filter layer adjacent to the first color filter layer, respectively, or a thickness of the first color filter layer is less than thicknesses of the second color filter layer and the third color filter layer adjacent to the first color filter layer, respectively.

[0016] Optionally, the second color filter layer and the third color filter layer adjacent to each other are not overlapped.

[0017] A second aspect of the present disclosure provides a display device including the display panel of the first aspect of the present disclosure.

[0018] The beneficial effects of the present disclosure are as follows:

[0019] The technical solution of the present disclosure is directed to the difference in the light radiation range of the upper and lower light-emitting layers in the stacked device. By directly forming a first overlapping area and a second overlapping area between the pixels, and the normal projection area of the first overlapping area on the substrate and the normal projection area of the second overlapping area on the substrate are respectively greater than the normal projection area of the overlapping area between the second color filter layer and the third color filter layer adjacent thereto on the substrate, the light of any color passing through the first overlapping area and the second overlapping area is effectively reduced, the influence on the surrounding pixels is reduced, a better filtering effect is formed in the middle area of the adjacent pixels, the problem of easy large-angle color deviation of the light-emitting layer in the stacked device is improved, the color viewing angle stability of the product is improved, the monochromatic light purity is improved, and the color gamut of the product is improved. BRIEF DESCRIPTION OF DRAWINGS

[0020] The specific embodiments of the present disclosure will be further described in detail below with reference to the accompanying drawings.

[0021] Figure 1 An architecture schematic diagram of each light-emitting layer of a stacked light-emitting device in the related art is shown.

[0022] Figure 2 A corresponding monochromatic light emission path schematic diagram of each light-emitting layer of a stacked light-emitting device in the related art is shown.

[0023] Figure 3 A color film layer schematic diagram of a stacked light-emitting device in the related art is shown.

[0024] Figure 4 A structure schematic diagram of a stacked light-emitting device in the related art is shown.

[0025] Figure 5 A structure schematic diagram of a display panel provided by an embodiment of the present disclosure is shown.

[0026] Figure 6 An effective light-emitting area and stray light area schematic diagram of a display panel provided by an embodiment of the present disclosure is shown.

[0027] Figure 7 A comparison diagram of color deviation with viewing angle change curves of the related art and the embodiment of the present disclosure is shown.

[0028] Figure 8 A structure schematic diagram of a stacked device of a display panel provided by an embodiment of the present disclosure is shown.

[0029] Figures 9-18 A structure schematic diagram of a color film layer of a display panel provided by an embodiment of the present disclosure is shown. DETAILED DESCRIPTION

[0030] The "on", "formed on" and "disposed on" described in the present disclosure can mean that one layer is directly formed or disposed on another layer, or can mean that one layer is indirectly formed or disposed on another layer, i.e., there are other layers between the two layers.

[0031] It should be noted that although the terms "first", "second" and the like can be used herein to describe various components, members, elements, regions, layers and / or sections, these components, members, elements, regions, layers and / or sections should not be limited by these terms. Rather, these terms are used to distinguish one component, member, element, region, layer and / or section from another. Thus, for example, the first component, first member, first element, first region, first layer and / or first section discussed below can be called the second component, second member, second element, second region, second layer and / or second section without departing from the teachings of the present disclosure.

[0032] In the present disclosure, unless otherwise specified, the term "disposed in the same layer" means that two layers, components, members, elements or sections can be formed by the same preparation process (e.g., a patterning process, etc.), and the two layers, components, members, elements or sections are generally formed of the same material. For example, two or more functional layers disposed in the same layer means that these functional layers disposed in the same layer can be formed using the same material layer and the same preparation process, so that the preparation process of the display substrate can be simplified.

[0033] In the present disclosure, unless otherwise specified, the expression "patterning process" generally includes the steps of coating, exposing, developing, etching, stripping of photoresist, etc. The expression "one-time patterning process" means a process of forming a patterned layer, component, member, etc. using one mask plate.

[0034] At present, in the stacked structure of, for example, a micro organic light emitting diode (Micro OLED), there is a problem of color cast caused by color stringing of adjacent sub-pixels.

[0035] In the related art, Micro OLED display needs to carry ultra-high resolution (for example, resolution greater than 2000ppi) to meet the use requirements of small size, light weight and ultra-high definition. In order to achieve such resolution, the pixel size of Micro OLED display is usually microns or even nanometers. The display pixel of the liquid crystal display (LCD) and the organic light emitting diode display device (for example, resolution of 100ppi-500ppi) in the related art is several times larger than that of Micro OLED display. Because of the extremely small pixel size, the cross-color problem between Micro OLED display pixels is more obvious; and because of the process precision limitation, Micro OLED cannot realize the pixel arrangement of red, green and blue colors side by side like large-size organic light emitting diode display device (OLED), but uses white light emitting element combined with red, green and blue color filter layer to realize full-color display, which also limits the efficiency, brightness and life level of organic light emitting diode display device.

[0036] In the related art, the white light emitting layer is divided into two or more light emitting layers, and the construction of the stacked device can effectively improve the important photoelectric performance indicators such as current efficiency, output brightness, operation life, etc. of Micro OLED. The stacked device introduces a charge generation layer (CGL) to connect multiple light emitting layers to construct a stacked light emitting device, which can realize the effect of light emitting superposition. The tandem organic light emitting diode display device (Tandem OLED) has the advantages of high brightness and long life, but the stacked device still cannot solve the cross-color problem between pixels on the Micro OLED. In the commonly used stacked device architecture, there are great differences among the red, green and blue light emitting layers, so that the boundaries of single-color light emitting paths in the stacked device are different.

[0037] In the related art, as shown in Figure 1 The upper light emitting layer in the stacked device includes a blue sub-light emitting layer 1003, and the lower light emitting layer includes a red and green mixed sub-light emitting layer 1001. The blue sub-light emitting layer 1003 is located above the charge generation layer 1002, and the red and green mixed sub-light emitting layer 1001 is located below the charge generation layer 1002. As shown in Figure 2As shown, the blue sub-emissive layer has no obstruction at its edges, resulting in a relatively dispersed luminous range 202. The red and green mixed sub-emissive layer has a pixel-defined edge, which reduces stray light at the edges of this layer, making the luminous range 201 of the red and green mixed sub-emissive layer more convergent. In this case, when a monochrome pixel of the display module is lit, the red, green, and blue monochromatic lights will cause varying degrees of crosstalk to surrounding pixels due to their different radiation ranges. For example, the stray light at the edges of blue light causes the most severe crosstalk to surrounding pixels, while the crosstalk between red and blue light is relatively minor. Simultaneously, because pixel segmentation causes cathode puncture leakage, this leakage path causes the blue sub-emissive layer to emit light. Since the cathode puncture area is at the pixel edge, this leakage further expands the radiation range of the blue sub-emissive layer.

[0038] In related technologies, by aligning the central axis of the filter layer with the central axis of the pixel and making it slightly wider than the pixel width, stray light from the pixel edges is filtered to a certain extent, reducing the impact of crosstalk from surrounding pixels. For example... Figure 3 As shown, this uniform size setting of the red, green, and blue color filter layers results in low adaptability to stacked devices. The light radiation range of the upper and lower light-emitting layers in a stacked light-emitting device differs significantly, and stray light from the edge of the upper light-emitting layer is more likely to cause crosstalk between pixels. Due to the difference in the transmission spectrum of different color filter layers, for example, when the upper light-emitting layer is a blue sub-light-emitting layer, stray light from the edge of the blue sub-light-emitting layer will pass through the green filter layer. This means that when a blue sub-pixel is lit, the green filter layer will experience crosstalk from the blue light, allowing some light to pass through, thus affecting the color purity of the blue monochromatic light and reducing the color gamut of the display panel. Furthermore, pixel segmentation in a stacked device causes cathode puncture leakage, resulting in the blue sub-light-emitting layer emitting light. The cathode puncture area is the edge region of the sub-pixel, and cathode puncture leakage further expands the radiation range of the blue sub-light-emitting layer.

[0039] In related technologies, such as Figure 4As shown, the stacked device 100 includes a blue sub-light emitting layer above the charge generating layer, and a green and red mixed sub-light emitting layer below the charge generating layer. The light emitting area of the blue sub-light emitting layer towards the color filter layer direction includes an effective light emitting area 102 and a stray light area 101 at the edge of the sub-pixel, which is the stray light area of the blue sub-light emitting layer. The light emitted by the blue sub-light emitting layer within the effective light emitting area 102 and the light emitted by the green and red mixed sub-light emitting layer mix to form white light. The stray light area 101 is caused by the blue light at the edge of the blue sub-light emitting layer entering the adjacent sub-pixel due to the absence of pixel definition layer shielding the edge of the blue sub-light emitting layer, and the stray light emitted by the blue sub-light emitting layer transmits through the red filter layer 103 and the green filter layer 105, causing light cross talk. For example, when the size of the blue filter layer 104 is larger than the size of the sub-pixel, the blue stray light of the adjacent sub-pixel will be emitted along the direction Y to the blue filter layer 104; when the size of the blue filter layer 104 is smaller than the size of the sub-pixel, the blue stray light of the sub-pixel corresponding to the blue filter layer 104 will be emitted along the direction Z to the green filter layer 105. Moreover, the cathode puncture leakage outside the sub-pixel causes the edge of the blue sub-light emitting layer to emit light, further expanding the stray light area. The effective light emitting area 102 is entirely within the blue filter layer, and the stray light area 101 is at least partially outside the blue filter layer, which causes the blue light of the stray light area to cross talk to the adjacent sub-pixel, affecting the color purity of the blue light, and reducing the color gamut of the display panel.

[0040] Therefore, an embodiment of the present disclosure provides a display panel, comprising a substrate and a driving circuit layer, a light emitting device layer, an encapsulation layer and a color filter layer sequentially stacked on the substrate; the light emitting device layer comprises an array of light emitting functional layers, and each light emitting functional layer comprises a plurality of sub-light emitting layers sequentially stacked; the color filter layer comprises an array of first color filter layers, second color filter layers and third color filter layers, a first color filter layer covers a light emitting functional layer in a normal projection on the substrate, a second color filter layer covers a light emitting functional layer in a normal projection on the substrate, and a third color filter layer covers a light emitting functional layer in a normal projection on the substrate; wherein the sub-light emitting layer closest to the color filter layer among the plurality of sub-light emitting layers is a first color sub-light emitting layer, there is a first overlapping area between the first color filter layer and the second color filter layer adjacent thereto, and there is a second overlapping area between the first color filter layer and the third color filter layer adjacent thereto, and the normal projection area of the first overlapping area on the substrate and the normal projection area of the second overlapping area on the substrate are respectively greater than the normal projection area of the overlapping area between the second color filter layer and the third color filter layer adjacent thereto on the substrate.

[0041] In a specific example, such as Figure 5 As shown, the display panel may include a substrate 10, a first electrode layer 20, a pixel definition layer 30, a light-emitting device layer 40, a second electrode layer 50, and a color filter layer 60. The first electrode layer 20 is located on one side of the substrate 10 and includes a plurality of first electrodes 21. The pixel definition layer 30 is located on the side of the first electrode layer 20 facing away from the substrate 10, and the pixel definition layer 30 has an opening 31 corresponding to the first electrodes 21. The light-emitting device layer 40 includes a plurality of sub-pixels 40a located at the opening 31. Each sub-pixel 40a includes a second sub-light-emitting layer 41, a charge-generating layer 42, and a first sub-light-emitting layer 43, sequentially stacked along the direction facing away from the substrate 10. The second electrode layer 50 is located on the side of the light-emitting device layer 40 facing away from the substrate 10. The color filter layer 60 is located on the side of the second electrode layer 50 facing away from the substrate 10. The color filter layer 60 includes multiple first color filter layers 61, second color filter layers 62, and third color filter layers 63; the first color filter layers 61, second color filter layers 62, and third color filter layers 63 are arranged sequentially along the X direction. Each of the first color filter layers 61, second color filter layers 62, and third color filter layers 63 corresponds to a sub-pixel 40a. An encapsulation layer 70 may also be disposed between the second electrode layer 50 and the color filter layer 60.

[0042] It should be noted that there can be multiple first electrodes 21, and each of the multiple first electrodes 21 corresponds one-to-one with a multiple sub-pixels 40a. The first electrodes 21 corresponding to different sub-pixels 40a are spaced apart; the second electrode layer 50 can be a single-layer structure, that is, the second electrode layer 50 can be an integral structure. For example, the first electrode 21 can be an anode, and the second electrode layer 50 can be a cathode. Alternatively, the first electrode 21 can be a cathode, and the second electrode layer 50 can be an anode.

[0043] It should be noted that sub-pixel 40a is not limited to including two sub-emitting layers stacked together, but may also include more sub-emitting layers stacked together. In a sub-pixel 40a, a charge generation layer 42 may be provided between every two adjacent emitting layers. In the embodiments of this disclosure, sub-pixel 40a including two sub-emitting layers is used as an example for description.

[0044] It should be noted that the first color filter layer 61, the second color filter layer 62, and the third color filter layer 63 may include a red filter layer, a green filter layer, and a blue filter layer. In this embodiment, the specific colors of the first color filter layer, the second color filter layer, and the third color filter layer are not limited. The color filter layer formed first can be regarded as the first color filter layer, and the color filter layer formed later can be regarded as the second color filter layer.

[0045] In a specific example, such asFigure 5 As shown, the first sub-light emitting layer 43 is a first color sub-light emitting layer, and the light emitted by the first color sub-light emitting layer includes first color light.

[0046] In one specific example, as shown in FIG. 4, the first color filter layer 61 and the second color filter layer 62 have a first overlap region 64, and the first color filter layer 61 and the third color filter layer 63 have a second overlap region 65. Figure 5

[0047] In one specific example, as shown in FIG. 4, the first color filter layer 61 and the second color filter layer 62 have a first overlap region 64, and the first color filter layer 61 and the third color filter layer 63 have a second overlap region 65. Figure 5 As shown, the second sub-light emitting layer 41 is limited in the opening 31 by the sidewall of the opening 31 of the pixel definition layer 30, so that the edge portion of the second sub-light emitting layer 41 is shielded by the sidewall, thereby reducing the edge stray light of the second sub-light emitting layer 41, and the light emitting range of the second sub-light emitting layer 41 is relatively convergent.

[0048] Further, the edge of the first sub-light emitting layer 43 is not shielded by the pixel definition layer 30, and the light emitting range is relatively dispersed relative to the second sub-light emitting layer 41. That is, the radiation area of the first color light emitted by the first sub-light emitting layer 43 on the color filter layer 60 is larger than the radiation area of the light emitted by the second sub-light emitting layer 41 on the color filter layer 60. The overlapping part of the radiation area of the first sub-light emitting layer 43 and the radiation area of the second sub-light emitting layer 41 mixes to form white light, and the part of the first sub-light emitting layer 43 beyond the radiation area of the second sub-light emitting layer 41 is monochromatic light.

[0049] In one specific example, as shown in FIG. 4, the first color filter layer 61 and the second color filter layer 62 have a first overlap region 64, and the first color filter layer 61 and the third color filter layer 63 have a second overlap region 65. Figure 5 As shown, the light emitting area of the first sub-light emitting layer 43 towards the color filter layer includes an effective light emitting area and a stray light area located at the edge of the sub-pixel, wherein the area inside the dashed line 71 is the effective light emitting area, and the area between the dashed line 71 and the dashed line 72 is the stray light area of the first sub-light emitting layer 43; the area inside the dashed line 74 is the effective light emitting area, and the area between the dashed line 73 and the dashed line 74 is the stray light area of the first sub-light emitting layer 43. The first overlap region 64 between the first color filter layer 61 and the second color filter layer 62 causes the stray light area to be entirely located in the second color filter layer 62, and the second overlap region 65 between the first color filter layer 61 and the third color filter layer 63 causes the stray light area to be entirely located in the third color filter layer 63.

[0050] In one specific example, as shown in FIG. 4, the first color filter layer 61 and the second color filter layer 62 have a first overlap region 64, and the first color filter layer 61 and the third color filter layer 63 have a second overlap region 65. Figure 6 ​As shown, the light-emitting region of the first sub-emitting layer 43 facing the color filter layer includes an effective light-emitting region and a stray light region located at the edge of the sub-pixel. The region between dashed lines 76 and 77 is the effective light-emitting region, the region between dashed lines 75 and 76 is the stray light region of the first sub-emitting layer 43, and the region between dashed lines 77 and 78 is also the stray light region of the first sub-emitting layer 43. A first overlapping region 64 exists between the first color filter layer 61 and the second color filter layer 62, and a second overlapping region 65 exists between the first color filter layer 61 and the third color filter layer 63. The first overlapping region 64 and the second overlapping region 65 ensure that the stray light region is entirely located within the second color filter layer 62 and the third color filter layer 63.

[0051] Furthermore, the radiation area of ​​the first color light emitted by the first sub-light-emitting layer 43 on the color filter layer 60 is located within the area defined by the first color filter layer 61, so that the first overlapping area 64 and the second overlapping area 65 effectively cover the stray light area at the edge of the sub-pixel, thereby effectively enhancing the color purity of the display panel, improving the color gamut of the display panel, and improving the display effect of the display panel.

[0052] In a specific example, such as Figures 5-6 As shown, sub-pixel 40a includes a second sub-emitting layer 41, a charge generating layer 42, and a first sub-emitting layer 43, which are sequentially stacked along the direction away from the substrate 10. The light emitted by the first sub-emitting layer 41 includes a first color light. The color filter layer 60 includes a first color filter layer 61, a second color filter layer 62, and a third color filter layer 63 disposed adjacent to each other. The first color light can pass through the first color filter layer 61. The first color filter layer 61 forms a first overlapping region 64 and a second overlapping region 65 with the second color filter layer 62 and the third color filter layer 63 in the direction parallel to the substrate 10, respectively. The size of the first color filter layer 61 near the encapsulation layer 70 is smaller than the size of the second color filter layer 62 near the encapsulation layer 70, and the size of the first color filter layer 61 near the encapsulation layer 70 is smaller than the size of the third color filter layer 63 near the encapsulation layer 70.

[0053] Further, compared with the difference in light radiation range of the first sub-light emitting layer 43 and the second sub-light emitting layer 41 in the related art, the display panel in the embodiment forms the first overlapping area 64 and the second overlapping area 65, so that the size of the first color filter layer 61 in the direction parallel to the substrate 10 is smaller than the size of the second color filter layer 62 and the third color filter layer 63 in the direction parallel to the substrate 10, the coverage of the second color filter layer 62 and the coverage of the third color filter layer 63 are increased respectively, so that the second color filter layer 62 and the third color filter layer 63 can cover the radiation area of the first color light emitted by the first light emitting layer 43 on the color film layer 60. At the same time, the coverage of the first color filter layer 61 is smaller than the coverage of the second color filter layer 62 and the third color filter layer 63, and the first color filter layer 61 can cover the radiation area of the first color light emitted by the first light emitting layer 43 on the color film layer 60.

[0054] In a specific example, as shown in FIG. 3, Figure 7 the curve 301 of the color shift of the red-green-blue three-color filter layer structure in the related art with the change of the viewing angle, and the curve 302 of the color shift of the red-green-blue three-color filter layer structure in the embodiment of the present disclosure with the change of the viewing angle; it can be seen from Figure 7 that the color shift value in the related art increases with the increase of the viewing angle, and the color shift value ΔUV is as high as 0.035 when the viewing angle is 60°; while in the embodiment of the present disclosure, the color shift value is stable and less than 0.010 when the viewing angle is 60°.

[0055] The embodiment is aimed at the difference in light radiation range of the upper and lower light emitting layers in the stacked device, by directly forming the first overlapping area and the second overlapping area between the pixels, and the orthographic projection area of the first overlapping area on the substrate and the orthographic projection area of the second overlapping area on the substrate are respectively greater than the orthographic projection area of the overlapping area between the second color filter layer and the third color filter layer adjacent thereto on the substrate, effectively reducing the light of any color passing through the first overlapping area and the second overlapping area, reducing the influence on the surrounding pixels, forming a better filtering effect in the middle area of the adjacent pixels, improving the problem of large-angle color shift of the light emitting layer in the stacked device, improving the color viewing angle stability of the product, improving the monochromatic light purity, and further improving the color gamut of the product.

[0056] In a specific example, the light-emitting device layer 40 is a series-connected light-emitting device, such as a Tandem OLED device. The charge generation layer 42 is located between the first sub-light-emitting layer 43 and the second sub-light-emitting layer 41. The charge generation layer 42 may include an N-type charge generation layer N-CGL and a P-type charge generation layer P-CGL. The N-type charge generation layer N-CGL is close to the first electrode 21, and the N-type and P-type charge generation layers can be in direct contact with each other to form an NP junction. The NP junction can concurrently generate electrons and holes in the N-type and P-type charge generation layers. For example, the generated electrons are transported to the second light-emitting layer 41 through the N-type charge generation layer, and the generated holes are transported to the first light-emitting layer 43 through the P-type charge generation layer.

[0057] In a specific example, the light-emitting device layer 40 emits light under the drive of the first electrode 21 and the second electrode layer 50. For example, the light-emitting device layer 40 can be a multilayer thin film structure. The light-emitting device layer 40 may also include a hole transport layer (HTL) and an electron transport layer (ETL). Of course, as needed, in some embodiments, a hole injection layer (HIL) may be provided between the hole transport layer and the anode, and an electron injection layer (EIL) may be provided between the electron transport layer and the cathode.

[0058] In a specific example, such as Figure 8 As shown, the first electrode 21 is the anode, and the second electrode layer 50 is the cathode. Further, an electron injection layer 49 and a first electron transport layer 48 are included between the first sub-light-emitting layer 43 and the second electrode layer 50; a first hole transport layer 47 is disposed between the charge generation layer 42 and the first sub-light-emitting layer 43; a second electron transport layer 46 is disposed between the charge generation layer 42 and the second sub-light-emitting layer 41; and a second hole transport layer 45 and a hole injection layer 44 are disposed between the first electrode 21 and the second sub-light-emitting layer 41.

[0059] It should be noted that sub-pixel 40a is not limited to including two stacked light-emitting layers, but may also include more stacked light-emitting layers. In a sub-pixel 40a, a charge generation layer 42 may be provided between every two adjacent light-emitting layers. In the embodiments of this disclosure, sub-pixel 40a including two light-emitting layers is used as an example for description.

[0060] In one specific example, the sub-pixel 40a can have different light-emitting layers. For example, the first sub-light-emitting layer 43 can include a red and green mixed sub-light-emitting layer, or the first sub-light-emitting layer 43 can include a double-layer blue sub-light-emitting layer. When the first sub-light-emitting layer 43 adopts different structures, the sizes of the first overlapping area 64 and the second overlapping area 65 in the direction X can be determined by calculating the radiation areas of the light emitted by the corresponding first sub-light-emitting layer 43 on the color filter layer 60. For example, the width of the corresponding color filter in the direction X can be determined by determining the radiation areas of the light emitted by the blue sub-light-emitting layer, the green and red mixed sub-light-emitting layer, and the green sub-light-emitting layer on the color filter layer. The light-emitting ranges of the blue sub-light-emitting layer, the red sub-light-emitting layer, and the green sub-light-emitting layer can overlap, and in this case, the central axis positions of the color filters of different colors of the color filter layer can be adjusted accordingly.

[0061] In one specific example, the second sub-light-emitting layer 41 is limited within the opening 31, the orthographic projection of the opening 31 on the substrate 10 is located within the orthographic projection of the first sub-light-emitting layer 43 on the substrate 10, and the radiation area of the first color light emitted by the first sub-light-emitting layer 43 on the color filter layer 60 is located within the area defined by the first color filter layer 61, that is, the irradiation range of the first color light emitted by the first sub-light-emitting layer 43 on the color filter layer 60 is located within the area defined by the first color filter layer 61. The cross section of the opening 31 is trapezoidal, the side wall of the opening 31 is inclined relative to the first electrode 21, the side of the opening 31 close to the first electrode 21 is the bottom surface, the side of the opening 31 away from the first electrode 21 is the top surface, the second sub-light-emitting layer 41 is located on the bottom surface, and the two sides of the second sub-light-emitting layer 41 are enclosed by the side wall of the opening 31. In this way, the edges of the second sub-light-emitting layer 41 are blocked by the side wall of the opening 21, and the light-emitting range converges.

[0062] In one specific example, the orthographic projection of the opening 31 on the substrate 10 is located within the orthographic projection of the first light-emitting layer 43 on the substrate 10, which can be understood as the orthographic projection of the top surface of the opening 31 on the substrate 10 is located within the orthographic projection of the first sub-light-emitting layer 43 on the substrate 10, that is, the two ends of the first sub-light-emitting layer 43 are overlapped on the side of the pixel definition layer 30 away from the substrate 10. The edges of the first sub-light-emitting layer 43 are not blocked by the pixel definition layer 30, and the light-emitting range is relatively dispersed.

[0063] In one possible implementation, the cross section of the first color filter layer is inverted trapezoidal, and the cross sections of the second color filter layer and the third color filter layer adjacent to the first color filter layer are trapezoidal, respectively.

[0064] In one specific example, as Figure 9As shown, the light-emitting region of the first sub-light-emitting layer facing the color filter layer includes an effective light-emitting region 90 and a stray light region 80 located at the edge of the light-emitting device layer 40. The stray light region is the stray light region of the first sub-light-emitting layer.

[0065] Furthermore, such as Figure 9 As shown, the cross-section of the first color filter layer 611 is an inverted trapezoid, while the cross-sections of the second color filter layer 621 and the third color filter layer 631 are respectively regular trapezoids.

[0066] Furthermore, such as Figure 9 As shown, the thicknesses of the first color filter layer 611, the second color filter layer 621, and the third color filter layer 631 are approximately equal. In the first overlapping region 641, the sides of the first color filter layer 611 and the second color filter layer 621 are in contact; in the second overlapping region 651, the sides of the first color filter layer 611 and the third color filter layer 631 are in contact.

[0067] In a specific example, such as Figure 10 As shown, the light-emitting region of the first sub-light-emitting layer facing the color filter layer includes an effective light-emitting region 90 and a stray light region 80 located at the edge of the light-emitting device layer 40. The stray light region is the stray light region of the first sub-light-emitting layer.

[0068] Furthermore, such as Figure 10 As shown, the cross-section of the first color filter layer 612 is an inverted trapezoid, while the cross-sections of the second color filter layer 622 and the third color filter layer 632 are respectively upright and inverted trapezoids.

[0069] Furthermore, such as Figure 10 As shown, the thickness of the first color filter layer 612 is greater than the thickness of the second color filter layer 622 and the thickness of the third color filter layer 632, and the thicknesses of the second color filter layer 622 and the third color filter layer 632 are approximately equal. In the first overlapping region 642, the portion of the first color filter layer 612 that is thicker than the second color filter layer 622 is collinear with the side of the second color filter layer 622; in the second overlapping region 652, the portion of the first color filter layer 612 that is thicker than the third color filter layer 622 is collinear with the side of the third color filter layer 632.

[0070] In a specific example, such as Figure 11 As shown, the light-emitting region of the first sub-light-emitting layer facing the color filter layer includes an effective light-emitting region 90 and a stray light region 80 located at the edge of the light-emitting device layer 40. The stray light region is the stray light region of the first sub-light-emitting layer.

[0071] Furthermore, such as Figure 11As shown, the cross-section of the first color filter layer 613 is an inverted trapezoid, while the cross-sections of the second color filter layer 623 and the third color filter layer 633 are respectively upright and inverted trapezoids.

[0072] Furthermore, such as Figure 11 As shown, the thickness of the first color filter layer 613 is less than the thickness of the second color filter layer 623 and the thickness of the third color filter layer 633, and the thicknesses of the second color filter layer 623 and the third color filter layer 633 are approximately equal. In the first overlapping region 643, the side of the first color filter layer 613 that is thinner than the second color filter layer 623 is collinear with the side of the second color filter layer 623; in the second overlapping region 653, the side of the first color filter layer 613 that is thinner than the third color filter layer 623 is collinear with the side of the third color filter layer 633.

[0073] In a specific example, such as Figure 12 As shown, the light-emitting region of the first sub-light-emitting layer facing the filter layer includes an effective light-emitting region 90 and a stray light region 80 located at the edge of the light-emitting device layer 40. The stray light region is the stray light region of the first sub-light-emitting layer.

[0074] Furthermore, such as Figure 12 As shown, the cross-section of the first color filter layer 614 is an inverted trapezoid, while the cross-sections of the second color filter layer 624 and the third color filter layer 634 are respectively regular trapezoids.

[0075] Furthermore, such as Figure 12 As shown, the thickness of the first color filter layer 614 is greater than the thickness of the second color filter layer 624 and the thickness of the third color filter layer 634, respectively, and the thicknesses of the second color filter layer 624 and the third color filter layer 634 are approximately equal. In the first overlapping region 644, the portion of the side of the first color filter layer 614 that is higher than the second color filter layer 624 is not collinear with the side of the second color filter layer 624; in the second overlapping region 654, the portion of the side of the first color filter layer 614 that is higher than the third color filter layer 634 is not collinear with the side of the third color filter layer 634.

[0076] In a specific example, such as Figure 13 As shown, the light-emitting region of the first sub-light-emitting layer facing the filter layer includes an effective light-emitting region 90 and a stray light region 80 located at the edge of the light-emitting device layer 40. The stray light region is the stray light region of the first sub-light-emitting layer.

[0077] Furthermore, such as Figure 13 As shown, the cross-section of the first color filter layer 615 is an inverted trapezoid, while the cross-sections of the second color filter layer 625 and the third color filter layer 635 are respectively regular trapezoids.

[0078] Furthermore, such asFigure 13 As shown, the thickness of the first color filter layer 615 is less than the thickness of the second color filter layer 625 and the thickness of the third color filter layer 635, and the thickness of the second color filter layer 625 and the thickness of the third color filter layer 635 are approximately equal. In the first overlapping area 645, the side of the first color filter layer 615 below the second color filter layer 625 is not collinear with the side of the second color filter layer 625; in the second overlapping area 655, the side of the first color filter layer 615 below the third color filter layer 635 is not collinear with the side of the third color filter layer 635.

[0079] In one specific example, as shown in FIG. 6, the light-emitting device layer 40 can be different stacked architectures, such as a red and green mixed light-emitting layer as an upper light-emitting layer structure, a red-green-blue stacked light-emitting layer, or a strong microcavity OLED device, and the structural size of the corresponding color filter layer needs to be optimized and determined by calculating the corresponding pixel size, the radiation characteristics of the OLED device, and the like. Figures 9-13

[0080] The embodiment forms an overlapping area in the middle area of adjacent pixels, which can obtain a better filtering effect and effectively improve the color viewing angle stability of the MicroOLED with ultra-high resolution (for example, resolution greater than 2000 ppi).

[0081] In one possible implementation, the cross section of the first color filter layer is a right trapezoid, and the cross sections of the second color filter layer and the third color filter layer adjacent to the first color filter layer are inverted trapezoids, respectively.

[0082] In one specific example, as shown in FIG. 6, the light-emitting device layer 40 can be different stacked architectures, such as a red and green mixed light-emitting layer as an upper light-emitting layer structure, a red-green-blue stacked light-emitting layer, or a strong microcavity OLED device, and the structural size of the corresponding color filter layer needs to be optimized and determined by calculating the corresponding pixel size, the radiation characteristics of the OLED device, and the like. Figure 14 As shown, the light-emitting area of the first sub light-emitting layer towards the color film layer direction includes an effective light-emitting area 90 and a stray light area 80 located at the edge of the light-emitting device layer 40, and the stray light area is the stray light area of the first sub light-emitting layer.

[0083] Further, as shown in FIG. 6, the cross section of the first color filter layer 616 is a right trapezoid, and the cross sections of the second color filter layer 626 and the third color filter layer 636 are inverted trapezoids, respectively. Figure 14 Further, as shown in FIG. 6, the thickness of the first color filter layer 616, the second color filter layer 626, and the third color filter layer 636 are approximately equal. In the first overlapping area 646, the side of the first color filter layer 616 and the side of the second color filter layer 626 are in contact; in the second overlapping area 656, the side of the first color filter layer 616 and the side of the third color filter layer 636 are in contact.

[0084] Figure 14 In one specific example, as shown in FIG. 6, the light-emitting device layer 40 can be different stacked architectures, such as a red and green mixed light-emitting layer as an upper light-emitting layer structure, a red-green-blue stacked light-emitting layer, or a strong microcavity OLED device, and the structural size of the corresponding color filter layer needs to be optimized and determined by calculating the corresponding pixel size, the radiation characteristics of the OLED device, and the like.

[0085] In one specific example, as shown in FIG. 6, the light-emitting device layer 40 can be different stacked architectures, such as a red and green mixed light-emitting layer as an upper light-emitting layer structure, a red-green-blue stacked light-emitting layer, or a strong microcavity OLED device, and the structural size of the corresponding color filter layer needs to be optimized and determined by calculating the corresponding pixel size, the radiation characteristics of the OLED device, and the like. Figure 15 ​​As shown, the light emitting region of the first sub light emitting layer towards the color filter layer direction includes an effective light emitting region 90 and a stray light region 80 located at the edge of the light emitting device layer 40, and the stray light region is the stray light region of the first sub light emitting layer.

[0086] Further, as shown in FIG. 6A, the cross section of the first color filter layer 617 is a right trapezoid, and the cross sections of the second color filter layer 627 and the third color filter layer 637 are inverted trapezoids, respectively. Figure 15 Further, as shown in FIG. 6A, the thickness of the first color filter layer 617 is greater than the thickness of the second color filter layer 627 and the thickness of the third color filter layer 637, and the thickness of the second color filter layer 627 and the thickness of the third color filter layer 637 are approximately equal. In the first overlapping region 647, the side of the first color filter layer 617 higher than the second color filter layer 627 is collinear with the side of the second color filter layer 627; in the second overlapping region 657, the side of the first color filter layer 617 lower than the third color filter layer 637 is collinear with the side of the third color filter layer 637.

[0087] Figure 15 Further, as shown in FIG. 6A, the thickness of the first color filter layer 617 is greater than the thickness of the second color filter layer 627 and the thickness of the third color filter layer 637, and the thickness of the second color filter layer 627 and the thickness of the third color filter layer 637 are approximately equal. In the first overlapping region 647, the side of the first color filter layer 617 higher than the second color filter layer 627 is collinear with the side of the second color filter layer 627; in the second overlapping region 657, the side of the first color filter layer 617 lower than the third color filter layer 637 is collinear with the side of the third color filter layer 637.

[0088] In a specific example, as shown in FIG. 6B, the light emitting region of the first sub light emitting layer towards the color filter layer direction includes an effective light emitting region 90 and a stray light region 80 located at the edge of the light emitting device layer 40, and the stray light region is the stray light region of the first sub light emitting layer. Figure 16 Further, as shown in FIG. 6B, the cross section of the first color filter layer 617 is a right trapezoid, and the cross sections of the second color filter layer 627 and the third color filter layer 637 are inverted trapezoids, respectively.

[0089] Figure 16 Further, as shown in FIG. 6B, the thickness of the first color filter layer 617 is greater than the thickness of the second color filter layer 627 and the thickness of the third color filter layer 637, and the thickness of the second color filter layer 627 and the thickness of the third color filter layer 637 are approximately equal. In the first overlapping region 647, the side of the first color filter layer 617 higher than the second color filter layer 627 is collinear with the side of the second color filter layer 627; in the second overlapping region 657, the side of the first color filter layer 617 lower than the third color filter layer 637 is collinear with the side of the third color filter layer 637.

[0090] Further, as shown in FIG. 6B, the thickness of the first color filter layer 617 is greater than the thickness of the second color filter layer 627 and the thickness of the third color filter layer 637, and the thickness of the second color filter layer 627 and the thickness of the third color filter layer 637 are approximately equal. In the first overlapping region 647, the side of the first color filter layer 617 higher than the second color filter layer 627 is collinear with the side of the second color filter layer 627; in the second overlapping region 657, the side of the first color filter layer 617 lower than the third color filter layer 637 is collinear with the side of the third color filter layer 637. Figure 16 In a specific example, as shown in FIG. 6B, the light emitting region of the first sub light emitting layer towards the color filter layer direction includes an effective light emitting region 90 and a stray light region 80 located at the edge of the light emitting device layer 40, and the stray light region is the stray light region of the first sub light emitting layer.

[0091] Figure 17 Further, as shown in FIG. 6B, the cross section of the first color filter layer 617 is a right trapezoid, and the cross sections of the second color filter layer 627 and the third color filter layer 637 are inverted trapezoids, respectively.

[0092] ​​​Furthermore, such as Figure 17 As shown, the cross-section of the first color filter layer 619 is a regular trapezoid, while the cross-sections of the second color filter layer 629 and the third color filter layer 639 are inverted trapezoids, respectively.

[0093] Furthermore, such as Figure 17 As shown, the thickness of the first color filter layer 619 is greater than the thickness of the second color filter layer 629 and the thickness of the third color filter layer 639, and the thicknesses of the second color filter layer 629 and the third color filter layer 639 are approximately equal. In the first overlapping region 649, the portion of the side of the first color filter layer 619 that is higher than the second color filter layer 629 is not collinear with the side of the second color filter layer 629; in the second overlapping region 659, the portion of the side of the first color filter layer 619 that is higher than the third color filter layer 639 is not collinear with the side of the third color filter layer 639.

[0094] In a specific example, such as Figure 18 As shown, the light-emitting region of the first sub-light-emitting layer facing the color filter layer includes an effective light-emitting region 90 and a stray light region 80 located at the edge of the light-emitting device layer 40. The stray light region is the stray light region of the first sub-light-emitting layer.

[0095] Furthermore, such as Figure 18 As shown, the cross-section of the first color filter layer 6110 is a regular trapezoid, while the cross-sections of the second color filter layer 6210 and the third color filter layer 6310 are inverted trapezoids, respectively.

[0096] Furthermore, such as Figure 18 As shown, the thickness of the first color filter layer 6110 is less than the thickness of the second color filter layer 6210 and the thickness of the third color filter layer 6310, and the thicknesses of the second color filter layer 6210 and the third color filter layer 6310 are approximately equal. In the first overlapping region 6410, the side edge of the first color filter layer 6110 that is lower than the second color filter layer 6210 is not collinear with the side edge of the second color filter layer 6210; in the second overlapping region 6510, the side edge of the first color filter layer 6110 that is lower than the third color filter layer 6310 is not collinear with the side edge of the third color filter layer 6310.

[0097] In a specific example, such as Figures 14-18 As shown, the light-emitting device layer 40 can be a different stacked architecture, such as a red and green mixed light-emitting layer as the upper light-emitting layer structure, a red-green-blue stacked light-emitting layer, or a strong microcavity OLED device, etc. The corresponding structure size of the filter layer needs to be optimized and determined by calculating the corresponding pixel size, OLED device radiation characteristics, etc.

[0098] The embodiment forms an overlapping area in the middle region of adjacent pixels, which can obtain better filtering effect and effectively improve the color viewing angle stability of the MicroOLED with ultra-high resolution (for example, resolution greater than 2000ppi).

[0099] In a possible implementation, a normal projection of the first overlapping area on the substrate is located in a gap between adjacent light-emitting functional layers, and a normal projection of the second overlapping area on the substrate is located in a gap between adjacent light-emitting functional layers.

[0100] In a specific example, as shown in FIG. 18, the normal projection of the first overlapping area 641, the first overlapping area 642, the first overlapping area 643, the first overlapping area 644, the first overlapping area 645, the first overlapping area 646, the first overlapping area 647, the first overlapping area 648, the first overlapping area 649, and the first overlapping area 6410 on the substrate is located in a gap between adjacent light-emitting functional layers 40. Figure 9 -As shown in 18, the normal projection of the first overlapping area 641, the first overlapping area 642, the first overlapping area 643, the first overlapping area 644, the first overlapping area 645, the first overlapping area 646, the first overlapping area 647, the first overlapping area 648, the first overlapping area 649, and the first overlapping area 6410 on the substrate is located in a gap between adjacent light-emitting functional layers 40.

[0101] In a specific example, by adjusting the size of the second color filter layer, the normal projection of the part of the second color filter layer in the first overlapping area on the substrate is located in a gap between adjacent light-emitting functional layers, and the size of the corresponding second color filter layer needs to be optimized and determined by calculating the corresponding pixel size, OLED device radiation characteristics, etc.

[0102] In a specific example, as shown in FIG. 18, the normal projection of the first overlapping area 641, the first overlapping area 642, the first overlapping area 643, the first overlapping area 644, the first overlapping area 645, the first overlapping area 646, the first overlapping area 647, the first overlapping area 648, the first overlapping area 649, and the first overlapping area 6410 on the substrate is located in a gap between adjacent light-emitting functional layers 40. Figure 9 -As shown in 18, the normal projection of the first overlapping area 641, the first overlapping area 642, the first overlapping area 643, the first overlapping area 644, the first overlapping area 645, the first overlapping area 646, the first overlapping area 647, the first overlapping area 648, the first overlapping area 649, and the first overlapping area 6410 on the substrate is located in a gap between adjacent light-emitting functional layers 40.

[0103] In a specific example, by adjusting the size of the third color filter layer, the normal projection of the part of the third color filter layer in the second overlapping area on the substrate is located in a gap between adjacent light-emitting functional layers, and the size of the corresponding third color filter layer needs to be optimized and determined by calculating the corresponding pixel size, OLED device radiation characteristics, etc.

[0104] In one possible implementation, the orthographic projection of the first overlapping region on the substrate coincides with the orthographic projection of the gap between adjacent light-emitting functional layers on the substrate, and the orthographic projection of the second overlapping region on the substrate coincides with the orthographic projection of the gap between adjacent light-emitting functional layers on the substrate.

[0105] In a specific example, such as Figure 9 As shown in Figure 18, the orthographic projections of the first overlapping regions 641, 642, 643, 644, 645, 646, 647, 648, 649, and 6410 onto the substrate can also coincide with the orthographic projections of the gaps between adjacent light-emitting functional layers onto the substrate.

[0106] In a specific example, by adjusting the size of the second color filter layer, the orthographic projection of a portion of the second color filter layer on the substrate in the first overlapping region coincides with the orthographic projection of the gap between the adjacent light-emitting functional layers on the substrate. The corresponding size of the second color filter layer needs to be optimized and determined by calculating the corresponding pixel size, OLED device radiation characteristics, etc.

[0107] In a specific example, such as Figure 9 As shown in Figure 18, the orthographic projections of the second overlapping regions 651, 652, 653, 654, 655, 656, 657, 658, 659, and 6510 onto the substrate can also coincide with the orthographic projections of the gaps between adjacent light-emitting functional layers onto the substrate.

[0108] In a specific example, by adjusting the size of the third color filter layer, the orthographic projection of a portion of the third color filter layer on the substrate in the second overlapping region coincides with the orthographic projection of the gap between the adjacent light-emitting functional layers on the substrate. The corresponding size of the third color filter layer needs to be optimized and determined by calculating the corresponding pixel size, OLED device radiation characteristics, etc.

[0109] In one possible implementation, the first color, the second color, and the third color are one of red, green, and blue, respectively.

[0110] In a specific example, such as Figure 9As shown in Figure 18, the first color filter layers 611, 612, 613, 614, 615, 616, 617, 618, 619, and 6110 are blue filter layers.

[0111] Furthermore, the second color filter layers 621, 622, 623, 624, 625, 626, 627, 628, 629, and 6210 are red filter layers.

[0112] Furthermore, the third color filter layers 631, 632, 633, 634, 635, 636, 637, 638, 639, and 6310 are green filter layers.

[0113] In one possible implementation, the plurality of sub-emitting layers stacked sequentially include a second color and a third color mixed sub-emitting layer and a first color sub-emitting layer stacked sequentially.

[0114] In a specific example, such as Figure 5 As shown, the second sub-emissive layer 41 is a sub-emissive layer that mixes the second and third colors, and the first sub-emissive layer 43 is a sub-emissive layer of the first color. For example, the second sub-emissive layer 41 is a sub-emissive layer that mixes red and green, and the first sub-emissive layer is a blue sub-emissive layer.

[0115] The advantages of this embodiment are that it is easy to prepare, easy to control the edge position of the filter layer, and can accurately achieve overlap.

[0116] In one possible implementation, the adjacent second color filter layer and the third color filter layer do not overlap.

[0117] In a specific example, such as Figure 9 - The partial cross-section shown in Figure 18 does not include the adjacent second color filter layer and the third color filter layer, but it is understood that the display panel may include the adjacent second color filter layer and the third color filter layer.

[0118] Furthermore, for example, the second sub-emitting layer can be a mixed red and green sub-emitting layer, the second color filter layer can be a red filter layer, and the third color filter layer can be a green filter layer. Since the mixed red and green sub-emitting layer is confined within the opening of the pixel definition layer, the edge portion of the second sub-emitting layer is blocked by the sidewalls, thereby reducing stray light at the edges of the second sub-emitting layer. The emission range of the second sub-emitting layer is more convergent, and there are no stray or crosstalk problems, eliminating the need for overlapping design.

[0119] In one possible implementation, the thickness of the first color filter layer is greater than the thickness of the second and third color filter layers adjacent to the first color filter layer, or the thickness of the first color filter layer is less than the thickness of the second and third color filter layers adjacent to the first color filter layer.

[0120] In a specific example, such as Figure 10 As shown, the thickness of the first color filter layer 612 is greater than the thickness of the second color filter layer 622 and the thickness of the third color filter layer 632, and the thicknesses of the second color filter layer 622 and the third color filter layer 632 are approximately equal. Figure 12 As shown, the thickness of the first color filter layer 614 is greater than the thickness of the second color filter layer 624 and the thickness of the third color filter layer 634, respectively, while the thicknesses of the second color filter layer 624 and the third color filter layer 634 are approximately equal. Figure 15 As shown, the thickness of the first color filter layer 617 is greater than the thickness of the second color filter layer 627 and the thickness of the third color filter layer 637, while the thicknesses of the second color filter layer 627 and the third color filter layer 637 are approximately equal. Figure 17 As shown, the thickness of the first color filter layer 619 is greater than the thickness of the second color filter layer 629 and the thickness of the third color filter layer 639, and the thickness of the second color filter layer 629 and the thickness of the third color filter layer 639 are approximately equal.

[0121] It should be noted that the thicknesses of the second and third color filter layers do not have to be approximately equal.

[0122] In a specific example, such as Figure 11 As shown, the thickness of the first color filter layer 613 is less than the thickness of the second color filter layer 623 and the thickness of the third color filter layer 633, and the thicknesses of the second color filter layer 623 and the third color filter layer 633 are approximately equal. Figure 13 As shown, the thickness of the first color filter layer 615 is less than the thickness of the second color filter layer 625 and the thickness of the third color filter layer 635, and the thicknesses of the second color filter layer 625 and the third color filter layer 635 are approximately equal. Figure 16As shown, the thickness of the first color filter layer 618 is less than the thickness of the second color filter layer 628 and the thickness of the third color filter layer 638, and the thicknesses of the second color filter layer 628 and the third color filter layer 638 are approximately equal. Figure 18 As shown, the thickness of the first color filter layer 6110 is less than the thickness of the second color filter layer 6210 and the thickness of the third color filter layer 6310, and the thickness of the second color filter layer 6210 and the thickness of the third color filter layer 6310 are approximately equal.

[0123] It should be noted that the thicknesses of the second and third color filter layers do not have to be approximately equal.

[0124] In a specific example, such as Figure 9 As shown, the thicknesses of the first color filter layer 611, the second color filter layer 621, and the third color filter layer 631 are approximately equal. Figure 14 As shown, the thicknesses of the first color filter layer 616, the second color filter layer 626, and the third color filter layer 636 are approximately equal.

[0125] Furthermore, in a specific example, the technical solution of the embodiments of this disclosure is further illustrated through the fabrication process of the display panel. It is understood that the term "patterning" in this disclosure, when the patterned material is inorganic or metallic, includes processes such as photoresist coating, mask exposure, development, etching, and photoresist stripping; when the patterned material is organic, "patterning" includes processes such as mask exposure and development. Evaporation, deposition, coating, and plating mentioned in this disclosure are all mature fabrication processes in related technologies.

[0126] Furthermore, a substrate 10 is provided, and a first electrode 21 is formed on one side of the substrate 10. There can be multiple first electrodes 21 arranged in an array. Exemplarily, a first electrode thin film can be deposited on one side of the substrate 10, and the first electrode 21 can be formed using a patterning process. The material of the first electrode 21 may include indium tin oxide (ITO). It is understood that the first electrode 21 is connected to a corresponding thin-film transistor in the substrate 10.

[0127] Furthermore, a pixel definition layer 30 is formed on the side of the first electrode 21 facing away from the substrate 10. The pixel definition layer 30 has a plurality of openings 31, each opening 31 defining the area where the sub-pixel 40a is located, and the first electrode 21 is exposed through the corresponding opening 31. The pixel definition layer 30 can be formed using conventional techniques in the art, which will not be described in detail here.

[0128] Furthermore, a light-emitting device layer 40 is formed on the side of the pixel definition layer 30 facing away from the substrate 10. For example, a second sub-light-emitting layer 41 is formed on the side of the first electrode 21 facing away from the substrate 10, a charge-generating layer 42 is formed on the side of the second sub-light-emitting layer 41 facing away from the substrate 10, and a first sub-light-emitting layer 43 is formed on the side of the charge-generating layer 42 facing away from the substrate.

[0129] Furthermore, a second electrode layer 50 is formed on the side of the light-emitting device layer 40 facing away from the substrate 10, and the second electrode layer 50 is an integral structure. Exemplarily, a second electrode thin film can be formed on the side of the light-emitting device layer 40 facing away from the substrate 10 using a sputtering method, and the second electrode thin film can be patterned to form a second electrode 23. The material of the second electrode 23 may include at least one of indium tin oxide (ITO), indium zinc oxide (IZO), etc. Exemplarily, a metal thin film can be formed on the side of the light-emitting device layer 40 facing away from the substrate 10 using a thermal evaporation method. The material of the metal thin film may include magnesium, silver, or a magnesium-silver alloy. A transparent semiconductor or transparent conductor can be deposited on the metal thin film as needed to form a second electrode layer, which includes a stacked metal thin film and a semiconductor (or conductor) thin film.

[0130] Furthermore, an encapsulation layer 70 is formed on the side of the second electrode layer 50 facing away from the substrate 10, and a color filter layer 60 is formed on the side of the encapsulation layer 70 facing away from the substrate 10. The color filter layer 60 is located on the side of the encapsulation layer 70 facing away from the substrate 10. The color filter layer 60 includes a first color filter layer 61, a second color filter layer 62, and a third color filter layer 63 disposed adjacent to each other. There is a first overlap region between the first color filter layer 61 and the adjacent second color filter layer 62, and there is a second overlap region between the first color filter layer 61 and the adjacent third color filter layer 63. For example, a blue color filter material layer is deposited on the side of the encapsulation layer 70 facing away from the substrate 10, and the first color filter layer 61 is formed by a patterning process. Then, a green color filter material layer and a red color filter material layer are deposited respectively, and the second color filter layer 62 and the third color filter layer 63 are formed by a patterning process.

[0131] It should be noted that the second color filter layer 62 and the third color filter layer 63 can also be formed first, and then the first color filter layer 61 can be formed.

[0132] Another embodiment of this disclosure provides a display device including the above-described display panel.

[0133] The display device can be any product or component with display function, such as electronic paper, mobile phone, tablet computer, television, monitor, laptop computer, digital photo frame, or navigator. This embodiment does not limit this.

[0134] Obviously, the above embodiments of this disclosure are merely examples for clearly illustrating this disclosure, and are not intended to limit the implementation of this disclosure. For those skilled in the art, other variations or modifications can be made based on the above description. It is impossible to exhaustively list all implementation methods here. Any obvious variations or modifications derived from the technical solutions of this disclosure are still within the protection scope of this disclosure.

Claims

1. A display panel, characterized in that, comprising a substrate and a driving circuit layer, a light emitting device layer, an encapsulation layer and a color filter layer which are sequentially stacked on the substrate; the light emitting device layer comprises an array of light emitting functional layers, and each light emitting functional layer comprises a plurality of sub-light emitting layers which are sequentially stacked; the color filter layer comprises an array of first color filter layers, second color filter layers and third color filter layers, a first color filter layer covers a light emitting functional layer in orthographic projection on the substrate, a second color filter layer covers a light emitting functional layer in orthographic projection on the substrate, and a third color filter layer covers a light emitting functional layer in orthographic projection on the substrate; wherein the sub-light emitting layer closest to the color filter layer in the plurality of sub-light emitting layers is a first color sub-light emitting layer, there is a first overlap area between the first color filter layer and the second color filter layer adjacent to the first color filter layer, and there is a second overlap area between the first color filter layer and the third color filter layer adjacent to the first color filter layer, the orthographic projection area of the first overlap area on the substrate and the orthographic projection area of the second overlap area on the substrate are greater than the orthographic projection area of the overlap area between the second color filter layer and the third color filter layer adjacent to the second color filter layer on the substrate; the light emitting area of the first color sub-light emitting layer towards the color filter layer direction comprises an effective light emitting area and a stray light area located at the edge of a sub-pixel; the first overlap area and the second overlap area cover the stray light area at the edge of the sub-pixel.

2. The display panel of claim 1, characterized in that, the orthographic projection of the first overlap area on the substrate is located in the orthographic projection of the gap between adjacent light emitting functional layers on the substrate, and the orthographic projection of the second overlap area on the substrate is located in the orthographic projection of the gap between adjacent light emitting functional layers on the substrate.

3. The display panel of claim 1, characterized in that, the orthographic projection of the first overlap area on the substrate coincides with the orthographic projection of the gap between adjacent light emitting functional layers on the substrate, and the orthographic projection of the second overlap area on the substrate coincides with the orthographic projection of the gap between adjacent light emitting functional layers on the substrate.

4. The display panel of claim 1, characterized in that, the first color, the second color and the third color are one of red, green and blue respectively.

5. The display panel of claim 1, characterized in that, the plurality of sub-light emitting layers which are sequentially stacked comprise a second color and third color mixed sub-light emitting layer and a first color sub-light emitting layer which are sequentially stacked.

6. The display panel of claim 1, wherein, the cross section of the first color filter layer is a right trapezoid, and the cross sections of the second color filter layer and the third color filter layer adjacent to the first color filter layer are inverted trapezoids respectively.

7. The display panel of claim 1, wherein, the cross section of the first color filter layer is an inverted trapezoid, and the cross sections of the second color filter layer and the third color filter layer adjacent to the first color filter layer are right trapezoids respectively.

8. The display panel of claim 1, wherein, The thickness of the first color filter layer is greater than the thickness of the second color filter layer and the third color filter layer adjacent to the first color filter layer, respectively, or the thickness of the first color filter layer is less than the thickness of the second color filter layer and the third color filter layer adjacent to the first color filter layer, respectively.

9. The display panel of claim 1, wherein, The second color filter layer and the third color filter layer adjacent to each other are not overlapped.

10. A display device, characterized by comprising: A display panel comprising the display panel according to any one of claims 1-9.

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