Display panel and display device

Abstract

The embodiment of the invention discloses a display panel and a display device. The display panel comprises a light-emitting device layer and a color film layer which are sequentially arranged on a substrate in a stacked mode. The light-emitting device layer comprises light-emitting function layers arranged in an array mode, and each light-emitting function layer comprises a plurality of sub light-emitting layers which are sequentially arranged in a stacked mode. The color film layer comprises a first color filter layer, a second color filter layer and a third color filter layer which are arranged in an array; the sub-light-emitting layer closest to the color film layer in the multiple sub-light-emitting layers is a first color sub-light-emitting layer, a first overlapping area exists between the first color filter layer and the second color filter layer adjacent to the first color filter layer, and a second overlapping area exists 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 overlapping area on the substrate and the orthographic projection area of the second overlapping area on the substrate are respectively larger than the orthographic projection area 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 field of display technology, and more specifically, to a display panel and a display device. Background Art

[0002] Currently, in a tandem structure such as a micro organic light emitting diode (Micro OLED), there is a problem of color shift caused by cross-color between adjacent sub-pixels. Summary of the invention

[0003] An object of the present disclosure is to provide a display panel and a display device to solve at least one of the problems existing in the prior art.

[0004] In order to achieve the above objectives, the present invention adopts the following technical solutions:

[0005] A first aspect of the present disclosure provides a display panel, comprising a substrate and a driving circuit layer, a light-emitting device layer, a packaging layer and a color filter layer sequentially stacked on the substrate;

[0006] The light-emitting device layer includes a light-emitting functional layer arranged in an array, and the light-emitting functional layer includes a plurality of sub-light-emitting layers stacked in sequence;

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

[0008] Among them, the sub-light-emitting layer closest to the color filter layer among the multiple sub-light-emitting layers stacked in sequence is a first color sub-light-emitting layer, a first overlapping region exists between the first color filter layer and the second color filter layer adjacent thereto, a second overlapping region exists between the first color filter layer and the third color filter layer adjacent thereto, and an orthographic projection area of ​​the first overlapping region on the substrate and an orthographic projection area of ​​the second overlapping region on the substrate are respectively larger than an orthographic projection area of ​​an overlapping region between the second color filter layer and the third color filter layer adjacent thereto on the substrate.

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

[0010] Optionally, 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.

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

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

[0013] Optionally, the cross section of the first color filter layer is a regular 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 respectively inverted trapezoids.

[0014] Optionally, the cross section of the first color filter layer is in 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 respectively in a right trapezoid.

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

[0016] Optionally, the adjacent second color filter layer and the third color filter layer do not overlap.

[0017] A second aspect of the present disclosure provides a display device, comprising the display panel according to the first aspect of the present disclosure.

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

[0019] The technical solution disclosed in the present invention aims at the difference in 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 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 larger 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, 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 ​​adjacent pixels, the problem of 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 purity of the monochromatic light is improved, and the color gamut of the product is improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The specific implementation methods of the present disclosure are further described in detail below with reference to the accompanying drawings.

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

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

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

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

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

[0026] Figure 6 A schematic diagram showing an effective light emitting area and a stray light area of ​​a display panel provided by an embodiment of the present invention is shown.

[0027] Figure 7 A comparison diagram showing the color shift variation with viewing angle curves of the related art and the embodiment of the present invention is shown.

[0028] Figure 8 A schematic structural diagram of a display panel stacked device provided in an embodiment of the present invention is shown.

[0029] Figure 9-Figure 18 A schematic structural diagram of a color filter layer of a display panel provided by an embodiment of the present invention is shown. DETAILED DESCRIPTION

[0030] The terms “on”, “formed on” and “disposed on” in the present disclosure 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.

[0031] It should be noted that, although the terms "first", "second", etc. may be used herein to describe various parts, components, elements, regions, layers and / or parts, these parts, components, elements, regions, layers and / or parts should not be limited by these terms. Instead, these terms are used to distinguish one part, component, element, region, layer and / or part from another. Thus, for example, the first part, first member, first element, first region, first layer and / or first part discussed below may be referred to as the second part, second member, second element, second region, second layer and / or second part without departing from the teachings of the present disclosure.

[0032] In the present disclosure, unless otherwise specified, the term "same-layer arrangement" used refers to two layers, parts, components, elements or parts that can be formed by the same preparation process (such as a patterning process, etc.), and the two layers, parts, components, elements or parts are generally formed of the same material. For example, two or more functional layers are arranged in the same layer, which means that these functional layers arranged in the same layer can be formed using the same material layer and the same preparation process, thereby simplifying the preparation process of the display substrate.

[0033] In the present disclosure, unless otherwise specified, the expression "patterning process" generally includes steps such as photoresist coating, exposure, development, etching, photoresist stripping, etc. The expression "one-time patterning process" means a process of forming patterned layers, components, members, etc. using one mask.

[0034] Currently, in a stacked structure such as a Micro Organic Light Emitting Diode (Micro OLED), there is a problem of color shift in display caused by cross-color between adjacent sub-pixels.

[0035] In the related art, Micro OLED display needs to be equipped with ultra-high resolution (for example, resolution greater than 2000ppi) to meet the requirements of small size, lightweight and ultra-high definition. In order to achieve such a resolution, the pixel size of Micro OLED display is usually micron-level or even nanometer-level. The display pixels of liquid crystal display devices (LCD) and organic light-emitting diode display devices (for example, resolution of 100ppi to 500ppi) in the related art are several times larger than those of Micro OLED display pixels. Because of the extremely small pixel size, the cross-color problem between Micro OLED display pixels is more obvious; and because of the limitation of process precision, Micro OLED cannot achieve a side-by-side pixel arrangement of red, green and blue colors similar to large-size organic light-emitting diode display devices (OLED), but uses white light emitting elements with red, green and blue color filter layers to achieve full-color display, which also limits the efficiency, brightness and life of organic light-emitting diode display devices.

[0036] In the related art, dividing the white light emitting layer into two or more light emitting layers to construct a stacked device can effectively improve the important optoelectronic performance indicators of Micro OLED, such as current efficiency, output brightness, and operating life. The stacked device introduces a charge generation layer (Charge Generation Layer, CGL) to connect multiple light emitting layers in series to construct a stacked light emitting device, which can achieve the effect of light superposition. The stacked organic light emitting diode display device (Tandem Organic Light Emitting Diode, Tandem OLED) has the advantages of higher brightness and longer life, but the stacked device still does not solve the problem of color cross-talk between pixels on Micro OLED. In the commonly used stacked device architecture, there is a height difference between the red, green, and blue light emitting layers, which makes the boundaries of the monochrome light emitting paths in the stacked device different.

[0037] In related technologies, such as Figure 1 As shown, 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. Figure 2As shown, the edge of the blue sub-light-emitting layer is unobstructed, and the light-emitting range 202 is relatively scattered; the edge of the red and green mixed sub-light-emitting layers is surrounded by a pixel definition layer, which can reduce the edge stray light of the light-emitting layer, making the light-emitting range 201 of the red and green mixed sub-light-emitting layers more convergent. In this case, when the monochrome pixels of the display module are lit, the red, green and blue monochrome lights will have different degrees of crosstalk to the surrounding pixels due to the different radiation ranges. For example, the edge stray light of blue light has the most serious crosstalk to the surrounding pixels, and the crosstalk of red and blue light is relatively slight. At the same time, because pixel segmentation will cause cathode puncture leakage, this leakage path will cause the blue sub-light-emitting layer to emit light. Since the cathode puncture area is at the edge of the pixel, this leakage further expands the radiation range of the blue sub-light-emitting layer.

[0038] In the related art, the central axis of the filter layer is set to coincide with the central axis of the pixel and to be slightly wider than the pixel width, so as to filter the stray light at the edge of the pixel to a certain extent and reduce the influence of the light crosstalk of the surrounding pixels. Figure 3 As shown, this non-differentiated setting of the size of the red, green and blue three-color filter layers is less adaptable to stacked devices. There is a relatively obvious difference in the light radiation range of the upper and lower light-emitting layers of the stacked light-emitting device, and the edge stray light of the upper light-emitting layer is more likely to cause crosstalk between pixels. Due to the difference in the transmittance spectrum of different color filter layers, for example, when the upper light-emitting layer is a blue sub-light-emitting layer, the edge stray light of the blue sub-light-emitting layer will pass through the green filter layer. This will cause the green filter layer to be affected by the crosstalk of the blue light and transmit part of the light when the blue sub-pixel is lit, thereby affecting the color purity of the blue monochromatic light and reducing the color gamut of the display panel. Moreover, the pixel segmentation of the stacked device will cause cathode puncture leakage, causing the blue sub-light-emitting layer to emit light. The cathode puncture area is the edge area of ​​the sub-pixel, and the 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 located above the charge generation layer, and a green and red mixed sub-light emitting layer located below the charge generation layer. The light-emitting area of ​​the blue sub-light emitting layer toward the color filter layer includes an effective light-emitting area 102 and a stray light area 101 located at the edge of the sub-pixel, and the stray light area 101 is the stray light area of ​​the blue sub-light emitting layer. In the effective light-emitting area 102, the light emitted by the blue sub-light emitting layer and the light emitted by the green and red mixed sub-light emitting layer are mixed to form white light. Since the edge of the blue sub-light emitting layer in the stray light area 101 is not shielded by the pixel definition layer, the blue light at the edge of the blue sub-light emitting layer enters the adjacent sub-pixel, and the stray light emitted by the blue sub-light emitting layer passes through the red filter layer 103 and the green filter layer 105, resulting in cross-color light. 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 to the blue filter layer 104 along the direction Y; 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 to the green filter layer 105 along the direction Z. 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 located in the blue filter layer, and the stray light area 101 is at least partially located outside the blue filter layer, which causes the blue light in the stray light area to crosstalk to the adjacent sub-pixels, affecting the color purity of the blue light and reducing the color gamut of the display panel.

[0040] In view of this, an embodiment of the present disclosure provides a display panel, including a substrate and a driving circuit layer, a light-emitting device layer, an encapsulation layer and a color filter layer stacked in sequence on the substrate; the light-emitting device layer includes a light-emitting functional layer arranged in an array, and the light-emitting functional layer includes a plurality of sub-light-emitting layers stacked in sequence; the color filter layer includes a first color filter layer, a second color filter layer and a third color filter layer arranged in an array, an orthographic projection of the first color filter layer on the substrate covers an orthographic projection of the light-emitting layer functional layer on the substrate, an orthographic projection of the second color filter layer on the substrate covers an orthographic projection of the light-emitting layer functional layer on the substrate, and a third color filter layer includes a first color filter layer, a second color filter layer and a third color filter layer arranged in an array, wherein the orthographic projection of the first color filter layer on the substrate covers an orthographic projection of the light-emitting layer functional layer on the substrate, and the third color filter layer includes a first color filter layer, a second color filter layer and a third color filter layer arranged in an array. The orthographic projection of the color filter layer on the substrate covers the orthographic projection of the light-emitting layer functional layer on the substrate; wherein, the sub-light-emitting layer closest to the color filter layer among the multiple sub-light-emitting layers stacked in sequence is a first color sub-light-emitting layer, a first overlapping region exists between the first color filter layer and the second color filter layer adjacent thereto, a second overlapping region exists between the first color filter layer and the third color filter layer adjacent thereto, and the orthographic projection area of ​​the first overlapping region on the substrate and the orthographic projection area of ​​the second overlapping region on the substrate are respectively larger than the orthographic projection area of ​​the overlapping region between the second color filter layer and the third color filter layer adjacent thereto on the substrate.

[0041] In a specific example, 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 the first electrode layer 20 includes a plurality of first electrodes 21. The pixel definition layer 30 is located on the side of the first electrode layer 20 away from the substrate 10, and the pixel definition layer 30 is provided with an opening 31, and the opening 31 corresponds to the first electrode 21. The light-emitting device layer 40 includes a plurality of sub-pixels 40a located at the opening 31, and the sub-pixels 40a include a second sub-light-emitting layer 41, a charge generation layer 42, and a first sub-light-emitting layer 43 which are sequentially stacked in a direction away from the substrate 10. The second electrode layer 50 is located on the side of the light-emitting device layer 40 away from the substrate 10. The color filter layer 60 is located on the side of the second electrode layer 50 away from the substrate 10, and the color filter layer 60 includes a plurality of first color filter layers 61, a second color filter layer 62, and a third color filter layer 63; the first color filter layer 61, the second color filter layer 62, and the third color filter layer 63 are arranged in sequence along the direction X. The first color filter layer 61, the second color filter layer 62, and the third color filter layer 63 correspond to a sub-pixel 40a respectively. 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 the number of the first electrodes 21 may be multiple, and the multiple first electrodes 21 correspond to the multiple sub-pixels 40a one by one. The first electrodes 21 corresponding to different sub-pixels 40a are arranged at intervals; the second electrode layer 50 may be a whole layer structure, that is, the second electrode layer 50 may be an integrated structure. Exemplarily, the first electrode 21 may be an anode, and the second electrode layer 50 may be a cathode. Alternatively, the first electrode 21 may be a cathode, and the second electrode layer 50 may be an anode.

[0043] It should be noted that the sub-pixel 40a is not limited to including two sub-light-emitting layers in a stacked arrangement, but may also include more sub-light-emitting layers in a stacked arrangement. In a sub-pixel 40a, a charge generation layer 42 may be provided between each two adjacent light-emitting layers. In the embodiment of the present disclosure, the sub-pixel 40a including two sub-light-emitting layers is taken 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 the embodiment of the present disclosure, the specific colors of the first color filter layer, the second color filter layer, and the third color filter layer are not limited, and the color filter formed first can be regarded as the first color filter layer, and the color filter formed later can be regarded as the second color filter layer.

[0045] In a specific example, Figure 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 a specific example, Figure 5 As shown, there is a first overlapping region 64 between the first color filter layer 61 and the second color filter layer 62 ; and there is a second overlapping region 65 between the first color filter layer 61 and the third color filter layer 63 .

[0047] In a specific example, Figure 5 As shown, the second sub-light emitting layer 41 is confined within the opening 31 by the side walls of the opening 31 of the pixel definition layer 30, so that the edge portion of the second sub-light emitting layer 41 is blocked by the side walls, 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 more convergent.

[0048] Furthermore, the edge of the first sub-light emitting layer 43 is not blocked 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 is mixed to form white light, while the part of the first sub-light emitting layer 43 that exceeds the radiation area of ​​the second sub-light emitting layer 41 is monochromatic light.

[0049] In a specific example, Figure 5 As shown, the light-emitting area of ​​the first sub-light-emitting layer 43 toward 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 dotted line 71 is the effective light-emitting area, and the area between the dotted line 71 and the dotted line 72 is the stray light area of ​​the first sub-light-emitting layer 43; the area inside the dotted line 74 is the effective light-emitting area, and the area between the dotted line 73 and the dotted line 74 is the stray light area of ​​the first sub-light-emitting layer 43. There is a first overlapping area 64 between the first color filter layer 61 and the second color filter layer 62, and there is a second overlapping area 65 between the first color filter layer 61 and the third color filter layer 63. The first overlapping area 64 makes the stray light area all located in the second color filter layer 62, and the second overlapping area 65 makes the stray light area all located in the third color filter layer 63.

[0050] In a specific example, Figure 6As shown, the light-emitting area of ​​the first sub-light-emitting layer 43 toward 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 between the dotted line 76 and the dotted line 77 is the effective light-emitting area, the area between the dotted line 75 and the dotted line 76 is the stray light area of ​​the first sub-light-emitting layer 43, and the area between the dotted line 77 and the dotted line 78 is the stray light area of ​​the first sub-light-emitting layer 43. There is a first overlapping area 64 between the first color filter layer 61 and the second color filter layer 62, and there is a second overlapping area 65 between the first color filter layer 61 and the third color filter layer 63. The first overlapping area 64 and the second overlapping area 65 make the stray light area all located in 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 film 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, Figure 5-Figure 6 As shown, the sub-pixel 40a includes a second sub-light emitting layer 41, a charge generating layer 42, and a first sub-light emitting layer 43 which are sequentially stacked in a direction away from the substrate 10. The light emitted by the first sub-light emitting layer 41 includes a first color light, and 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 which are adjacently arranged. 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 a direction parallel to the substrate 10, respectively. The size of the first color filter layer 61 close to the encapsulation layer 70 is smaller than the size of the second color filter layer 62 close to the encapsulation layer 70, and the size of the first color filter layer 61 close to the encapsulation layer 70 is smaller than the size of the third color filter layer 63 close to the encapsulation layer 70.

[0053] Furthermore, compared with the difference in the light radiation range of the first sub-light emitting layer 43 and the second sub-light emitting layer 41 in the related art, which causes the first color filter layer 61, the second color filter layer 62, and the third color filter layer 63 to not completely include the radiation area of ​​the first sub-light emitting layer 43, the display panel of this embodiment forms a first overlapping area 64 and a 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, and 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 filter 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 filter layer 60.

[0054] In a specific example, Figure 7 As shown, a curve 301 of the color deviation of the red, green and blue three-color filter layer structure in the related art as the viewing angle changes, and a curve 302 of the color deviation of the red, green and blue three-color filter layer structure in the embodiment of the present disclosure as the viewing angle changes; Figure 7 It can be seen that the color deviation value in the related art increases with the increase of the viewing angle, and the color deviation value △UV is as high as 0.035 when the viewing angle is 60°; while in the embodiment of the present disclosure, the color deviation value is stably less than 0.010 when the viewing angle is 60°.

[0055] In view of the difference in light radiation ranges of the upper and lower light-emitting layers in the stacked device, this embodiment forms a first overlapping region and a second overlapping region directly between pixels, and the orthographic projection area of ​​the first overlapping region on the substrate and the orthographic projection area of ​​the second overlapping region on the substrate are respectively larger than the orthographic projection area of ​​the overlapping region between the second color filter layer and the third color filter layer adjacent thereto. This effectively reduces light of any color passing through the first overlapping region and the second overlapping region, reduces the impact on surrounding pixels, forms a better filtering effect in the middle area of ​​adjacent pixels, improves the problem of large-angle color deviation of the light-emitting layer in the stacked device, improves the color viewing angle stability of the product, enhances the purity of monochromatic light, and thereby improves the color gamut of the product.

[0056] In a specific example, the light-emitting device layer 40 is a tandem light-emitting device, for example, 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, and 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 charge generation layer and the P-type charge generation layer may be in direct contact with each other to form an NP junction. The NP junction is capable of concurrently generating electrons and holes in the N-type charge generation layer and the P-type charge generation layer. For example, the generated electrons are transmitted to the second light-emitting layer 41 through the N-type charge generation layer, and the generated holes are transmitted 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 multi-layer thin film structure. The light-emitting device layer 40 can also include a hole transport layer (HTL) and an electron transport layer (ETL). Of course, in some embodiments, a hole injection layer (HIL) can be provided between the hole transport layer and the anode, and an electron injection layer (EIL) can be provided between the electron transport layer and the cathode.

[0058] In a specific example, Figure 8 As shown, the first electrode 21 is an anode, and the second electrode layer 50 is a 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 provided between the charge generation layer 42 and the first sub-light emitting layer 43; a second electron transport layer 46 is provided 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 provided between the first electrode 21 and the second sub-light emitting layer 41.

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

[0060] In a specific example, the sub-pixel 40a may have different light-emitting layers. For example, the first sub-light-emitting layer 43 may include a red and green mixed sub-light-emitting layer, or the first sub-light-emitting layer 43 may include a double-layer blue sub-light-emitting layer. When the first sub-light-emitting layer 43 adopts a different structure, the size of the first overlapping area 64 and the second overlapping area 65 in the direction X can be determined by calculating the radiation area 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 area of ​​the light emitted by the blue sub-light-emitting layer and the green and red mixed 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 may intersect, and at this time, the central axis position of each color filter of the color filter layer can be adjusted accordingly.

[0061] In a specific example, the second sub-light emitting layer 41 is defined within the opening 31, the orthographic projection of the opening 31 on the base 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, and 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 defined and enclosed by the side walls of the opening 31. In this way, the edge of the second sub-light emitting layer 41 is blocked by the side wall of the opening 21, and the luminous range converges.

[0062] In a 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, both ends of the first sub-light-emitting layer 43 overlap on the side of the pixel definition layer 30 away from the base substrate 10. The edge of the first sub-light-emitting layer 43 is not blocked by the pixel definition layer 30, and the light-emitting range is relatively dispersed.

[0063] In a possible implementation manner, the cross section of the first color filter layer is in 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 respectively in a right trapezoid.

[0064] In a specific example, Fig. 9As shown, the light-emitting area of ​​the first sub-light-emitting layer toward the color filter layer 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.

[0065] Further, such as Fig. 9 As shown, the cross section of the first color filter layer 611 is in an inverted trapezoid, and the cross sections of the second color filter layer 621 and the third color filter layer 631 are respectively in a regular trapezoid.

[0066] Further, such as Fig. 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 side edge of the first color filter layer 611 is in contact with the side edge of the second color filter layer 621; in the second overlapping region 651, the side edge of the first color filter layer 611 is in contact with the side edge of the third color filter layer 631.

[0067] In a specific example, Fig.10 As shown, the light-emitting area of ​​the first sub-light-emitting layer toward the color filter layer 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.

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

[0069] Further, such as Fig.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 thickness of the second color filter layer 622 and the third color filter layer 632 are approximately equal. In the first overlapping region 642, the side edge of the first color filter layer 612 that is thicker than the second color filter layer 622 is collinear with the side edge of the second color filter layer 622; in the second overlapping region 652, the side edge of the first color filter layer 612 that is thicker than the third color filter layer 622 is collinear with the side edge of the third color filter layer 632.

[0070] In a specific example, Fig.11 As shown, the light-emitting area of ​​the first sub-light-emitting layer toward the color filter layer 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.

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

[0072] Further, such as Fig.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 thickness 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 edge of the first color filter layer 613 that is lower than the thickness of the second color filter layer 623 and the side edge of the second color filter layer 623 are collinear; in the second overlapping region 653, the side edge of the first color filter layer 613 that is lower than the thickness of the third color filter layer 623 and the side edge of the third color filter layer 633 are collinear.

[0073] In a specific example, Fig.12 As shown, the light emitting area of ​​the first sub-light emitting layer toward the filter layer 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.

[0074] Further, such as Fig.12 As shown, the cross section of the first color filter layer 614 is in an inverted trapezoid, and the cross sections of the second color filter layer 624 and the third color filter layer 634 are respectively in a right trapezoid.

[0075] Further, such as Fig.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, and the thickness of the second color filter layer 624 and the thickness of the third color filter layer 634 are approximately equal. In the first overlapping region 644, the side edge of the first color filter layer 614 that is higher than the second color filter layer 624 is not collinear with the side edge of the second color filter layer 624; in the second overlapping region 654, the side edge of the first color filter layer 614 that is higher than the third color filter layer 634 is not collinear with the side edge of the third color filter layer 634.

[0076] In a specific example, Fig.13 As shown, the light emitting area of ​​the first sub-light emitting layer toward the filter layer 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.

[0077] Further, such as Fig.13 As shown, the cross section of the first color filter layer 615 is in an inverted trapezoid, and the cross sections of the second color filter layer 625 and the third color filter layer 635 are respectively in a right trapezoid.

[0078] Further, such as Fig.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 region 645, the side edge of the first color filter layer 615 that is lower than the second color filter layer 625 is not collinear with the side edge of the second color filter layer 625; in the second overlapping region 655, the side edge of the first color filter layer 615 that is lower than the third color filter layer 635 is not collinear with the side edge of the third color filter layer 635.

[0079] In a specific example, Figure 9-13 As shown, the light-emitting device layer 40 can be of different stacked structures, such as a red and green mixed light-emitting layer as an upper light-emitting layer structure, a red, green and blue stacked light-emitting layer or a strong microcavity OLED device, etc. The structural size of the corresponding filter layer needs to be optimized and determined by calculating the corresponding pixel size, the radiation characteristics of the OLED device, etc.

[0080] In this embodiment, an overlapping area is formed between adjacent pixels to obtain a better light filtering effect, thereby effectively improving the color viewing angle stability of the MicroOLED with ultra-high resolution (for example, a resolution greater than 2000ppi).

[0081] In a possible implementation manner, the cross section of the first color filter layer is a regular 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 respectively inverted trapezoids.

[0082] In a specific example, Fig.14 As shown, the light-emitting area of ​​the first sub-light-emitting layer toward the color filter layer 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, such as Fig.14 As shown, the cross section of the first color filter layer 616 is a regular trapezoid, and the cross sections of the second color filter layer 626 and the third color filter layer 636 are respectively inverted trapezoids.

[0084] Further, such as Fig.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. In the first overlapping region 646, the side edge of the first color filter layer 616 and the side edge of the second color filter layer 626 are in contact; in the second overlapping region 656, the side edge of the first color filter layer 616 and the side edge of the third color filter layer 636 are in contact.

[0085] In a specific example, Fig.15As shown, the light-emitting area of ​​the first sub-light-emitting layer toward the color filter layer 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.

[0086] Further, such as Fig.15 As shown, the cross section of the first color filter layer 617 is a regular trapezoid, and the cross sections of the second color filter layer 627 and the third color filter layer 637 are respectively inverted trapezoids.

[0087] Further, such as Fig.15 As shown, the first color filter layer 617 is thicker than the second color filter layer 627 and the third color filter layer 637, and the thickness of the second color filter layer 627 is approximately equal to the thickness of the third color filter layer 637. In the first overlapping region 647, the side edge of the first color filter layer 617 that is higher than the second color filter layer 627 is collinear with the side edge of the second color filter layer 627; in the second overlapping region 657, the side edge of the first color filter layer 617 that is higher than the third color filter layer 637 is collinear with the side edge of the third color filter layer 637.

[0088] In a specific example, Fig.16 As shown, the light-emitting area of ​​the first sub-light-emitting layer toward the color filter layer 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.

[0089] Further, such as Fig.16 As shown, the cross section of the first color filter layer 618 is a regular trapezoid, and the cross sections of the second color filter layer 628 and the third color filter layer 638 are respectively inverted trapezoids.

[0090] Further, such as Fig.16 As shown, the first color filter layer 618 is thinner than the second color filter layer 628 and the third color filter layer 638, and the thickness of the second color filter layer 628 and the thickness of the third color filter layer 638 are approximately equal. In the first overlapping region 648, the side edge of the first color filter layer 618 that is lower than the second color filter layer 628 and the side edge of the second color filter layer 628 are collinear; in the second overlapping region 658, the side edge of the first color filter layer 618 that is lower than the third color filter layer 638 and the side edge of the third color filter layer 638 are collinear.

[0091] In a specific example, Fig.17 As shown, the light-emitting area of ​​the first sub-light-emitting layer toward the color filter layer 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.

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

[0093] Further, such as Fig.17 As shown, the first color filter layer 619 is thicker than the second color filter layer 629 and the third color filter layer 639, and the thickness of the second color filter layer 629 is approximately equal to the thickness of the third color filter layer 639. In the first overlapping region 649, the side edge of the first color filter layer 619 that is higher than the second color filter layer 629 is not collinear with the side edge of the second color filter layer 629; in the second overlapping region 659, the side edge of the first color filter layer 619 that is higher than the third color filter layer 639 is not collinear with the side edge of the third color filter layer 639.

[0094] In a specific example, Fig.18 As shown, the light-emitting area of ​​the first sub-light-emitting layer toward the color filter layer 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.

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

[0096] Further, such as Fig.18 As shown, the first color filter layer 6110 is thinner than the second color filter layer 6210 and 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. 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 and the side edge of the second color filter layer 6210 are not collinear; 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 and the side edge of the third color filter layer 6310 are not collinear.

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

[0098] In this embodiment, an overlapping area is formed between adjacent pixels to obtain a better light filtering effect, thereby effectively improving the color viewing angle stability of the MicroOLED with ultra-high resolution (for example, a resolution greater than 2000ppi).

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

[0100] In a specific example, Fig. 9 -As shown in 18, the orthographic projections of the first overlapping region 641, the first overlapping region 642, the first overlapping region 643, the first overlapping region 644, the first overlapping region 645, the first overlapping region 646, the first overlapping region 647, the first overlapping region 648, the first overlapping region 649, and the first overlapping region 6410 on the substrate are located in the orthographic projections of the gaps between adjacent light-emitting functional layers 40 on the substrate.

[0101] In a specific example, the size of the second color filter layer is adjusted so that the orthographic projection of part of the second color filter layer in the first overlapping area on the substrate is located in the orthographic projection of the gap between 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, the radiation characteristics of the OLED device, etc.

[0102] In a specific example, Fig. 9 -As shown in 18, the orthographic projections of the second overlapping region 651, the second overlapping region 652, the second overlapping region 653, the second overlapping region 654, the second overlapping region 655, the second overlapping region 656, the second overlapping region 657, the second overlapping region 658, the second overlapping region 659, and the second overlapping region 6510 on the substrate are located in the orthographic projections of the gaps between adjacent light-emitting functional layers 40 on the substrate.

[0103] In a specific example, by adjusting the size of the third color filter layer, the orthographic projection of part of the third color filter layer in the second overlapping area on the substrate is located in the orthographic projection of the gap between 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, the radiation characteristics of the OLED device, etc.

[0104] In a 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, Fig. 9 -As shown in 18, the orthographic projections of the first overlapping region 641, the first overlapping region 642, the first overlapping region 643, the first overlapping region 644, the first overlapping region 645, the first overlapping region 646, the first overlapping region 647, the first overlapping region 648, the first overlapping region 649, and the first overlapping region 6410 on the substrate may also coincide with the orthographic projections of the gaps between adjacent light-emitting functional layers on the substrate.

[0106] In a specific example, the size of the second color filter layer is adjusted so that the orthographic projection of part of the second color filter layer in the first overlapping area on the substrate coincides with the orthographic projection of the gap between 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, radiation characteristics of the OLED device, etc.

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

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

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

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

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

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

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

[0114] In a specific example, Figure 5 As shown, the second sub-light emitting layer 41 is a second color and a third color mixed sub-light emitting layer, and the first sub-light emitting layer 43 is a first color sub-light emitting layer. For example, the second sub-light emitting layer 41 is a red and green mixed sub-light emitting layer, and the first sub-light emitting layer is a blue sub-light emitting 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 overlapping.

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

[0117] In a specific example, Fig. 9 - The partial cross section shown in 18 does not include the adjacent second color filter layer and the third color filter layer, but it can be 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-light emitting layer is a red and green mixed sub-light emitting layer, the second color filter layer is a red filter layer, and the third color filter layer is a green filter layer. Since the red and green mixed sub-light emitting layers are confined within the opening by the sidewalls of the opening of the pixel definition layer, the edge portion of the second sub-light emitting layer is shielded by the sidewalls, thereby reducing the edge stray light of the second sub-light emitting layer, and the light emitting range of the second sub-light emitting layer is relatively convergent, there is no stray light and crosstalk problem, and there is no need to design overlap.

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

[0120] In a specific example, Fig.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 thickness of the second color filter layer 622 and the third color filter layer 632 are approximately equal. Fig.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, and the thickness of the second color filter layer 624 and the thickness of the third color filter layer 634 are approximately equal. Fig.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, and the thickness of the second color filter layer 627 and the thickness of the third color filter layer 637 are approximately equal. Fig.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 color filter layer and the third color filter layer may not be approximately equal.

[0122] In a specific example, Fig.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 thickness of the second color filter layer 623 and the third color filter layer 633 are approximately equal. Fig.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. Fig.16As shown, the first color filter layer 618 is smaller than the thickness of the second color filter layer 628 and the thickness of the third color filter layer 638, and the thickness of the second color filter layer 628 and the thickness of the third color filter layer 638 are approximately equal. Fig.18 As shown, the thickness of the first color filter layer 6110 is smaller 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 color filter layer and the third color filter layer may not be approximately equal.

[0124] In a specific example, Fig. 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. Fig.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] In addition, in a specific example, the technical solution of the embodiment of the present disclosure is further explained through the preparation process of the display panel. It can be understood that the "patterning" mentioned in the present disclosure includes processes such as coating photoresist, mask exposure, development, etching, and stripping photoresist when the patterned material is an inorganic material or metal; when the patterned material is an organic material, "patterning" includes processes such as mask exposure and development, and the evaporation, deposition, coating, and coating mentioned in the present disclosure are all mature preparation processes in the relevant technology.

[0126] Further, a substrate 10 is provided, and a first electrode 21 is formed on one side of the substrate 10. The number of the first electrodes 21 may be multiple, and the multiple first electrodes 21 are arranged in an array. Exemplarily, a first electrode film may be deposited on one side of the substrate 10, and the first electrode 21 may be formed by 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 the 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, and the pixel definition layer 30 is provided with a plurality of openings 31, each opening 31 defines 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 by conventional techniques in the art, which will not be described in detail herein.

[0128] Further, a light-emitting device layer 40 is formed on the side of the pixel definition layer 30 facing away from the substrate 10. Exemplarily, 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 generation 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 generation layer 42 facing away from the substrate.

[0129] Further, a second electrode layer 50 is formed on the side of the light-emitting device layer 40 away from the substrate 10, and the second electrode layer 50 is an integral structure. Exemplarily, a second electrode film can be formed on the side of the light-emitting device layer 40 away from the substrate 10 by a sputtering method, and the second electrode film is 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 film can be formed on the side of the light-emitting device layer 40 away from the substrate 10 by thermal evaporation, and the material of the metal film may include magnesium, silver, and magnesium-silver alloy. A transparent semiconductor or transparent conductor can be plated on the metal film as required to form a second electrode layer, and the second electrode layer includes a stacked metal film and a semiconductor (or conductor) film.

[0130] Further, 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 that are adjacently arranged. There is a first overlapping region between the first color filter layer 61 and the second color filter layer 62 adjacent thereto, and there is a second overlapping region between the first color filter layer 61 and the third color filter layer 63 adjacent thereto. Exemplarily, 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. 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 may be formed first, and then the first color filter layer 61 may be formed.

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

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

[0134] Obviously, the above embodiments of the present disclosure are merely examples for clearly illustrating the present disclosure, and are not limitations on the implementation methods of the present disclosure. For ordinary technicians in this field, other different forms of changes or modifications can be made on the basis of 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 disclosure are still within the protection scope of the present disclosure.

Claims

1. A display panel, characterized in that: It comprises a substrate and a driving circuit layer, a light emitting device layer, a packaging layer and a color film layer which are sequentially stacked on the substrate; The light-emitting device layer includes a light-emitting functional layer arranged in an array, and the light-emitting functional layer includes a plurality of sub-light-emitting layers stacked in sequence; The color filter layer comprises a first color filter layer, a second color filter layer and a third color filter layer arranged in an array, an orthographic projection of the first color filter layer on the substrate covers an orthographic projection of the light-emitting layer functional layer on the substrate, an orthographic projection of the second color filter layer on the substrate covers an orthographic projection of the light-emitting layer functional layer on the substrate, and an orthographic projection of the third color filter layer on the substrate covers an orthographic projection of the light-emitting layer functional layer on the substrate; Among them, the sub-light-emitting layer closest to the color filter layer among the multiple sub-light-emitting layers stacked in sequence is a first color sub-light-emitting layer, a first overlapping region exists between the first color filter layer and the second color filter layer adjacent thereto, a second overlapping region exists between the first color filter layer and the third color filter layer adjacent thereto, and an orthographic projection area of ​​the first overlapping region on the substrate and an orthographic projection area of ​​the second overlapping region on the substrate are respectively larger than an orthographic projection area of ​​an overlapping region between the second color filter layer and the third color filter layer adjacent thereto on the substrate.

2. The display panel according to claim 1, characterized in that: The orthographic projection of the first overlapping region 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 overlapping region 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 according to claim 1, characterized in that: 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.

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

5. The display panel according to claim 1, characterized in that: The plurality of sub-light emitting layers stacked in sequence include a second color and third color mixed sub-light emitting layer and a first color sub-light emitting layer stacked in sequence.

6. The display panel according to claim 1, characterized in that: The cross section of the first color filter layer is a regular 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 respectively inverted trapezoids.

7. The display panel according to claim 1, characterized in that: The cross section of the first color filter layer is in 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 respectively in a regular trapezoid.

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

9. The display panel according to claim 1, characterized in that: The adjacent second color filter layer and the third color filter layer do not overlap.

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

Images