Display panel and display device

Abstract

The present application discloses a display panel and a display device, wherein the display panel includes an array substrate, a planarization layer, a first electrode, a black composite pixel definition layer, an organic light-emitting layer, and a second electrode; the first electrode, the organic light-emitting layer, and the second electrode constitute a light-emitting device; and nanoparticles are added to the black composite pixel definition layer. By arranging the black composite pixel definition layer in the display panel to absorb incident light entering the display panel, the display panel has a good contrast when displayed under strong ambient light, and the light output rate of the display panel will not be reduced; the nanoparticles can absorb ultraviolet light, eliminate the influence of ultraviolet light on various devices in the array substrate, and can also enhance the adhesion between the black composite pixel definition layer and the first electrode, so that the black composite pixel definition layer and the first electrode are not easy to fall off.

Description

Technical Field

[0001] The present application relates to the field of display technology, and in particular to a display panel and a display device including the display panel. Background Art

[0002] At present, organic light emitting diode (OLED) displays have attracted much attention as display devices for displaying images. Unlike liquid crystal displays (LCD), OLED displays have high-quality characteristics such as self-luminous properties, low power consumption, high brightness, and high response speed. They are also thin, light, flexible, and highly designable. At the same time, they use organic semiconductors to emit light, and the range of materials available is wide, making it easy to achieve full-color display in the visible light range. In particular, top-emitting OLED devices, which have advantages such as large aperture ratio, are increasingly widely used in various fields.

[0003] However, the pixel definition layers used in current OLED devices are mostly transparent materials, and devices such as thin-film transistors in the display panel are easily affected by ultraviolet light, which deteriorates the performance of the device. Secondly, the pixel definition layer and the anode are two different materials, and the two materials are quite different, resulting in interface matching problems, which leads to poor adhesion of the pixel definition layer on the anode and easy natural peeling.

[0004] Therefore, it is urgent to improve the defects in the prior art. Summary of the invention

[0005] The purpose of the present application is to provide a display panel and a display device to solve the problem that devices such as thin film transistors in the display panel are easily affected by ultraviolet light, thereby deteriorating device performance, and that the pixel definition layer has poor adhesion on the anode and is easily peeled off naturally.

[0006] An embodiment of the present application provides a display panel, which includes: an array substrate; a planarization layer, which is arranged on the array substrate; a first electrode, which is arranged on the planarization layer and contacts the array substrate through a via hole on the planarization layer; a black composite pixel definition layer, which is arranged on the planarization layer, and is used to define the light-emitting area of ​​the display panel and absorb incident light entering the display panel, and nanoparticles are added to the black composite pixel definition layer; an organic light-emitting layer, which is arranged on the first electrode and located in the light-emitting area of ​​the display panel; a second electrode, which is arranged on the organic light-emitting layer and located in the light-emitting area of ​​the display panel; wherein the first electrode, the organic light-emitting layer and the second electrode constitute a light-emitting device.

[0007] Optionally, in some embodiments of the present application, the nanoparticles include at least one of titanium dioxide, zirconium oxide and zinc oxide.

[0008] Optionally, in some embodiments of the present application, the mass percentage of the nanoparticles in the black composite pixel definition layer is 1% to 50%.

[0009] Optionally, in some embodiments of the present application, the particle size of the nanoparticles is 0.1 μm to 0.25 μm.

[0010] Optionally, in some embodiments of the present application, the preparation material of the black composite pixel definition layer includes organic materials and black fillers; wherein the thickness of the black composite pixel definition layer is 1 μm to 1.5 μm, and the optical density value is greater than or equal to 1.2.

[0011] Optionally, in some embodiments of the present application, the display panel further includes: a filter layer, the filter layer including a plurality of filter units, and two adjacent filter units are overlapped to form a filter overlap area; wherein the filter overlap area corresponds to the black composite pixel definition layer, and the width of the filter overlap area is less than or equal to 2μm.

[0012] Optionally, in some embodiments of the present application, the filter unit includes: a red filter unit, a green filter unit and a blue filter unit; the organic light-emitting layer includes: a red organic light-emitting unit, a green organic light-emitting unit and a blue organic light-emitting unit; wherein the red filter unit is arranged corresponding to the red organic light-emitting unit, the green filter unit is arranged corresponding to the green organic light-emitting unit, and the blue filter unit is arranged corresponding to the blue organic light-emitting unit.

[0013] Optionally, in some embodiments of the present application, the area of ​​the red filter unit is larger than the area of ​​the red organic light-emitting unit, the area of ​​the green filter unit is larger than the area of ​​the green organic light-emitting unit, and the area of ​​the blue filter unit is larger than the area of ​​the blue organic light-emitting unit.

[0014] Optionally, in some embodiments of the present application, the display panel further includes: an encapsulation layer, the encapsulation layer being located between the filter layer and the black pixel definition layer, the encapsulation layer being used to encapsulate the light-emitting device; wherein the filter layer is fixedly connected to the encapsulation layer by optical glue.

[0015] Correspondingly, an embodiment of the present application further provides a display device, comprising the display panel described in the above embodiment and a cover plate, wherein the cover plate is arranged on a side of the display panel where the filter layer is arranged; wherein the cover plate is fixedly connected to the filter layer by optical glue.

[0016] In summary, the embodiment of the present application provides a display panel, including: an array substrate, a planarization layer, a first electrode, a black composite pixel definition layer, an organic light-emitting layer, a second electrode, a filter layer and an encapsulation layer; wherein the first electrode, the organic light-emitting layer and the second electrode constitute a light-emitting device. By arranging the black composite pixel definition layer in the display panel to absorb the incident light entering the display panel, the display panel has a good contrast when displayed under strong ambient light, and the light output rate of the display panel will not be reduced; in addition, since the nanoparticles are added to the black composite pixel definition layer, on the one hand, the nanoparticles can absorb ultraviolet light and eliminate the influence of ultraviolet light on various devices in the array substrate; on the other hand, it can also reduce the reflectivity of the first electrode while enhancing the adhesion between the black composite pixel definition layer and the first electrode, so that the black composite pixel definition layer and the first electrode are not easy to fall off.

[0017] Furthermore, the filter layer is used to reduce the reflected light of the ambient light on the surface of the display panel and the light generated by the light-emitting device, wherein the filter unit is arranged corresponding to the organic light-emitting layer, and the filter overlap area is arranged corresponding to the black composite pixel definition layer. This can increase the viewing angle of the display panel 10, reduce brightness attenuation, and improve transmittance. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For those skilled in the art, other drawings can be obtained based on these drawings without creative work.

[0019] Figure 1 The structure of the display panel in the embodiment of the present application is shown in FIG. Figure 1 ;

[0020] Figure 2 The structure of the display panel in the embodiment of the present application is shown in FIG. Figure 2 ;

[0021] Figure 3 The structure of the display panel in the embodiment of the present application is shown in FIG. Figure 3 ;

[0022] Figure 4 The structure of the display panel in the embodiment of the present application is shown in FIG. Figure 4 ;

[0023] Figure 5 It is a schematic diagram of the structure of the display device described in the embodiment of the present application.

[0024] Description of main reference numerals:

[0025]

[0026] DETAILED DESCRIPTION

[0027] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without making creative work are within the scope of protection of the present application. In addition, it should be understood that the specific implementation methods described herein are only used to illustrate and explain the present application, and are not used to limit the present application. In the present application, unless otherwise stated, the directional words used, such as "up", "down", "left" and "right", can be the direction of the actual use or working state of the device, can also be the direction of the drawing with reference to the accompanying drawings, and can also refer to two relative directions; while "inside" and "outside" refer to the outline of the device.

[0028] For details, please refer to Figures 1 to 4 An embodiment of the present application provides a display panel 10, which includes: an array substrate 100, a planarization layer 200, a first electrode 310, a black composite pixel definition layer 400, an organic light-emitting layer 320, a second electrode 330, a filter layer 500 and an encapsulation layer 600; wherein the first electrode 310, the organic light-emitting layer 320 and the second electrode 330 constitute a light-emitting device 300.

[0029] Specifically, the planarization layer 200 is arranged on the array substrate 100; the first electrode 310 is arranged on the planarization layer 200 and contacts the array substrate 100 through the via hole on the planarization layer 200; the black composite pixel definition layer 400 is arranged on the planarization layer 200, and the black composite pixel definition layer 400 is used to define the light-emitting area of ​​the display panel 10 and absorb incident light entering the display panel 10, and nanoparticles are added to the black composite pixel definition layer 400; the organic light-emitting layer 320 is arranged on the first electrode 310 and is located in the light-emitting area of ​​the display panel 10; the second electrode 330 is arranged on the organic light-emitting layer 320 and is located in the light-emitting area of ​​the display panel 10.

[0030] The present application sets the black composite pixel definition layer 400 in the display panel 10 to absorb the incident light entering the display panel 10, so that the display panel 10 has good contrast when displayed under strong ambient light, and the light output rate of the display panel 10 will not be reduced; in addition, since the nanoparticles are added to the black composite pixel definition layer 400, on the one hand, the nanoparticles can absorb ultraviolet light and eliminate the influence of ultraviolet light on various devices in the array substrate 100; on the other hand, it can also reduce the reflectivity of the first electrode 310 while enhancing the adhesion between the black composite pixel definition layer 400 and the first electrode 310, so that the black composite pixel definition layer 400 and the first electrode 310 are not easy to fall off.

[0031] like Figure 2As shown, in the present application, the array substrate 100 is a thin film transistor array substrate, including: a base substrate 110, a light shielding layer 120, a buffer layer 130, an active layer 140, a gate insulating layer 150, a gate 160, an interlayer insulating layer 170, a source / drain 180 and a passivation layer 190. Specifically, the light shielding layer 120 is disposed on the base substrate 110, the buffer layer 130 covers the light shielding layer 120 and the base substrate 110, the active layer 140 is disposed on the buffer layer 130, the gate insulating layer 150 is disposed on the active layer 140, the gate 160 is disposed on the gate insulating layer 150, the interlayer insulating layer 170 covers the gate 160 and the active layer 140, the source / drain 180 is connected to the active layer 140 through a via hole on the interlayer insulating layer 170, and the passivation layer 190 covers the source / drain 180 and the interlayer insulating layer 170. The base substrate 110 may be a flexible substrate, a glass substrate or a flexible substrate, and the material for preparing the flexible substrate includes but is not limited to polyimide and polyethylene terephthalate. The light shielding layer 120 can effectively reduce the influence of ambient light on the performance of each device in the thin film transistor. The buffer layer 130 is used for heat preservation, and is any one of a silicon nitride layer, a silicon oxide layer, or an overlapping layer of silicon nitride and silicon oxide. The active layer 140 is used for conducting carriers, and its preparation material can be polycrystalline silicon, single crystal silicon, or an oxide semiconductor. The gate insulating layer 150 is any one of a silicon nitride layer, a silicon oxide layer, or an overlapping layer of silicon nitride and silicon oxide. The preparation material of the gate 160 includes at least one of molybdenum, aluminum, titanium, chromium, and copper. The interlayer insulating layer 170 is used to insulate the source / drain 180 and the gate 160 from other conductive layers.

[0032] The light shielding layer 120 may be made of colored monovalent / composite metal oxides, such as chromium oxide, titanium oxide and other colored metal oxides and composite oxides thereof. When the light shielding layer 120 is made of colored monovalent / composite metal oxides, the light shielding layer 120 may be formed on the base substrate 110 by electron beam evaporation, sputtering and other techniques. The light shielding layer 120 may be made of black organic materials, such as cellulose ethyl acetate, polyethylene terephthalate, polystyrene, polyether, polyimide, polycarbonate, epoxy resin, phenoxy resin, polyether sulfone, polyacrylate and the like, and then black particles, such as carbon black, copper, cobalt, manganese, chromium, titanium and other oxides and composite oxide particles thereof, may be added.

[0033] In an embodiment of the present application, the planarization layer 200 can make the surface of the array substrate 100 flat, and the planarization layer 200 is made of an organic material and is formed by spin coating or evaporation.

[0034] In one embodiment of the present application, the light emitting device 300 includes a first electrode 310, an organic light emitting layer 320 and a second electrode 330. The first electrode 310 is an anode, and the first electrode 310 is electrically connected to the source / drain 180 of the array substrate 100 through a via hole on the planarization layer 200. The preparation method of the first electrode 310 includes but is not limited to plasma chemical vapor deposition, chemical vapor deposition and sputtering deposition. The second electrode 330 is a cathode, and its preparation method includes but is not limited to plasma chemical vapor deposition, chemical vapor deposition and sputtering deposition. The organic light emitting layer 320 is formed on the first electrode 310 by evaporation or inkjet printing and is located in the light emitting area of ​​the display panel 10. The organic light emitting layer 320 includes a red organic light emitting unit 321, a green organic light emitting unit 322 and a blue organic light emitting unit 323. The holes injected into the organic light-emitting layer 320 by the first electrode 310 and the electrons injected into the organic light-emitting layer 320 by the second electrode 330 are recombined in the organic light-emitting layer 320 to excite the organic molecules in the organic light-emitting layer 320 to produce light of different colors. The red organic light-emitting unit 321 produces red light after being excited, the green organic light-emitting unit 322 produces green light after being excited, and the blue organic light-emitting unit 323 produces blue light after being excited.

[0035] In one embodiment of the present application, an opening is provided on the black composite pixel definition layer 400 to define the light-emitting area of ​​the display panel 10. On the other hand, the black composite pixel definition layer 400 has light absorption so as to absorb the ambient light incident into the display panel 10, so as to prevent the ambient light from being reflected and then emitted and affecting the contrast of the display panel 10 during display. The preparation material of the black composite pixel definition layer 400 includes organic materials and black fillers. Organic materials include but are not limited to polyimide, polymethyl methacrylate and phenolic resin, and black fillers include but are not limited to black pigments, such as carbon black, copper, cobalt, manganese, chromium, titanium and other oxides and composite oxide particles thereof. The thickness of the black composite pixel definition layer 400 is 1 μm to 5 μm; preferably, the thickness of the black composite pixel definition layer 400 is 1 μm to 1.5 μm or 3 μm to 4 μm; for example: 1.25 μm, 3.5 μm. This arrangement ensures that the black composite pixel definition layer 400 can define the organic light-emitting layer 320, while ensuring the light shielding rate of the black composite pixel definition layer 400, and can make the nanoparticles fully mixed in the black composite pixel definition layer 400, thereby improving the adhesion between the interface of the black composite pixel definition layer 400 and the first electrode 310. Furthermore, the optical density value of the black composite pixel definition layer 400 is greater than or equal to 1.2, and this arrangement can ensure that the absorbance of the black composite pixel definition layer 400 is sufficient, thereby preventing crosstalk between the light-emitting units in the organic light-emitting layer 320.

[0036] In one embodiment of the present application, the nanoparticles include: at least one of titanium dioxide, zirconium oxide and zinc oxide. It is understandable that at least one of titanium dioxide, zirconium oxide and zinc oxide can be added to the black composite pixel definition layer 400. That is, the black composite pixel definition layer 400 can add one, two or three of titanium dioxide, zirconium oxide and zinc oxide. Preferably, the black composite pixel definition layer 400 contains titanium dioxide, zirconium oxide and zinc oxide. Further, the mass percentage of the nanoparticles in the black composite pixel definition layer 400 is 1% to 50%; preferably, the mass percentage of the nanoparticles in the black composite pixel definition layer 400 is 25% to 50%; for example: 30%, 35%, 40% and 45%. The particle size of the nanoparticles is 0.1μm to 0.25μm. In combination with the thickness of the black composite pixel definition layer 400 being 1 μm to 5 μm, the nanoparticles can be fully mixed in the black composite pixel definition layer 400 , thereby improving the adhesion between the interface of the black composite pixel definition layer 400 and the first electrode 310 .

[0037] like Figure 3As shown, in one embodiment of the present application, the filter layer 500 is used to reduce the reflected light of the ambient light on the surface of the display panel 10 and the light generated by the light emitting device 300. The filter layer 500 includes a plurality of filter units 510, and two adjacent filter units 510 are overlapped to form a filter overlap area 520; wherein the filter overlap area 520 is arranged corresponding to the black composite pixel definition layer 400. Specifically, the filter unit 510 includes: a red filter unit 511, a green filter unit 512 and a blue filter unit 513; wherein the red filter unit 511 is arranged corresponding to the red organic light emitting unit 321, the green filter unit 512 is arranged corresponding to the green organic light emitting unit 322, and the blue filter unit 513 is arranged corresponding to the blue organic light emitting unit 323. That is, the red filter unit 511 is located above the red organic light emitting unit 321, the green filter unit 512 is located above the green organic light emitting unit 322, the blue filter unit 513 is located above the blue organic light emitting unit 323, and the filter overlap area 520 is located in the non-light emitting area of ​​the display panel 10 and above the black composite pixel definition layer 400. The filter overlap area 520 can absorb ambient light incident on the surface of the display panel 10, and the red filter unit 511 can allow the red light emitted by the red organic light emitting unit 321 to pass through and absorb light of other colors, the green filter unit 512 can allow the green light emitted by the green organic light emitting unit 322 to pass through and absorb light of other colors, and the blue filter unit 513 can allow the blue light emitted by the blue organic light emitting unit 323 to pass through and absorb light of other colors.

[0038] like Figure 4 As shown, further, in this embodiment, the filter layer 500 includes a plurality of filter units 510, and two adjacent filter units 510 are overlapped to form a filter overlap area 520. During the preparation of the filter layer 500, the filter overlap area 520 can simultaneously prepare the red filter unit 511, the green filter unit 512 and the blue filter unit 513, that is, the filter overlap area 520 is composed of the red filter unit 511, the green filter unit 512 and the blue filter unit 513. Such a setting can improve the contrast of the filter layer 500, can replace the function of the traditional black matrix, and has a simpler structure. Further, the width of the filter overlap area 520 is less than or equal to 2μm, so that while ensuring light shielding, it prevents the width of the filter overlap area 520 from being too wide to affect the light output effect.

[0039] In an embodiment of the present application, the area of ​​the red filter unit 511 is larger than the area of ​​the red organic light emitting unit 321, the area of ​​the green filter unit 512 is larger than the area of ​​the green organic light emitting unit 322, and the area of ​​the blue filter unit 513 is larger than the area of ​​the blue organic light emitting unit 323. This arrangement can increase the viewing angle of the display panel 10, reduce the brightness attenuation of the red organic light emitting unit 321, the green organic light emitting unit 322, and the blue organic light emitting unit 323, and increase their transmittance.

[0040] In one embodiment of the present application, the encapsulation layer 600 is located between the filter layer 500 and the black pixel definition layer 400, and the encapsulation layer 600 is used to encapsulate the light emitting device 300 to prevent the first electrode 310, the second electrode 330 and the organic light emitting layer 320 in the light emitting device 300 from contacting with water and oxygen in the air and shortening the service life of the display panel 10; wherein the filter layer 500 is fixedly connected to the encapsulation layer 600 by an optical adhesive 700. The encapsulation layer 600 is an inorganic layer, an organic layer, or an overlapping layer of an inorganic layer and an organic layer, and the preparation material of the inorganic layer includes but is not limited to silicon nitride, silicon oxide or silicon oxynitride, and the preparation material of the organic layer includes but is not limited to polyacrylate.

[0041] See also Figure 5 Specifically, the present application further provides a display device 1, comprising the display panel 10 and a cover plate 20, wherein the cover plate 20 is arranged on a side of the display panel 10 where the filter layer 500 is arranged; wherein the cover plate 20 is fixedly connected to the filter layer 500 by an optical adhesive 700. The display device 1 can be any product or component with a display function, such as a mobile phone, a tablet computer, a television, a monitor, a laptop computer, a digital photo frame, a navigator, etc. The other essential components of the display device 1 should be understood by ordinary technicians in the field, and will not be described in detail here, nor should they be used as a limitation to the present application. The implementation of the display device 1 can refer to the above-mentioned embodiment of the display panel 10, and the repeated parts will not be described in detail.

[0042] In summary, the embodiment of the present application provides a display panel 10, including: an array substrate 100, a planarization layer 200, a first electrode 310, a black composite pixel definition layer 400, an organic light-emitting layer 320, a second electrode 330, a filter layer 500 and an encapsulation layer 600; wherein the first electrode 310, the organic light-emitting layer 320 and the second electrode 330 constitute a light-emitting device 300. By setting the black composite pixel definition layer 400 in the display panel 10 to absorb the incident light entering the display panel 10, the display panel 10 has a good contrast when displayed under strong ambient light, and the light output rate of the display panel 10 will not be reduced; in addition, since the nanoparticles are added to the black composite pixel definition layer 400, on the one hand, the nanoparticles can absorb ultraviolet light and eliminate the influence of ultraviolet light on various devices in the array substrate 100; on the other hand, it can also reduce the reflectivity of the first electrode 310 while enhancing the adhesion between the black composite pixel definition layer 400 and the first electrode 310, so that the black composite pixel definition layer 400 and the first electrode 310 are not easy to fall off.

[0043] Furthermore, the filter layer 500 is used to reduce the reflected light of the ambient light on the surface of the display panel 10 and the light generated by the light emitting device 300, wherein the filter unit 510 is arranged corresponding to the organic light emitting layer 320, and the filter overlap area 520 is arranged corresponding to the black composite pixel definition layer 400. This can increase the viewing angle of the display panel 10, reduce brightness attenuation, and improve transmittance.

[0044] In the above embodiments, the description of each embodiment has its own emphasis. For parts that are not described in detail in a certain embodiment, reference can be made to the relevant descriptions of other embodiments.

[0045] The technical solutions provided by the embodiments of the present application are introduced in detail above. Specific examples are used herein to illustrate the principles and implementation methods of the present application. The description of the above embodiments is only used to help understand the method of the present application and its core idea. At the same time, for technical personnel in this field, according to the idea of ​​the present application, there will be changes in the specific implementation methods and application scope. In summary, the content of this specification should not be understood as a limitation on the present application.

Claims

1. A display panel, characterized in that: The display panel comprises: an array substrate; a planarization layer, wherein the planarization layer is disposed on the array substrate; a first electrode, the first electrode being disposed on the planarization layer and contacting the array substrate through a via hole on the planarization layer; a black composite pixel definition layer, the black composite pixel definition layer being disposed on the planarization layer, the black composite pixel definition layer being used to define a light emitting area of ​​the display panel and absorb incident light entering the display panel, and nanoparticles being added to the black composite pixel definition layer; an organic light-emitting layer, the organic light-emitting layer being disposed on the first electrode and located in a light-emitting area of ​​the display panel; a second electrode, the second electrode being disposed on the organic light-emitting layer and located in a light-emitting area of ​​the display panel; Among them, the first electrode, the organic light-emitting layer and the second electrode constitute a light-emitting device, the mass percentage of the nanoparticles in the black composite pixel definition layer is 25% to 50%, the particle size of the nanoparticles is 0.1μm to 0.25μm, and the thickness of the black composite pixel definition layer is 1μm to 5μm. On the one hand, the nanoparticles can absorb ultraviolet light and eliminate the influence of ultraviolet light on various devices in the array substrate; on the other hand, the nanoparticles can also enhance the adhesion between the black composite pixel definition layer and the first electrode.

2. The display panel according to claim 1, wherein: The nanoparticles include at least one of titanium dioxide, zirconium oxide and zinc oxide.

3. The display panel according to claim 1, wherein: The preparation material of the black composite pixel definition layer includes organic material and black filler; The optical density value is greater than or equal to 1.

2.

4. The display panel according to claim 1, wherein: The display panel further includes: A filter layer, the filter layer comprising a plurality of filter units, two adjacent filter units are overlapped to form a filter overlap area; wherein The light filtering overlap region is arranged corresponding to the black composite pixel definition layer, and a width of the light filtering overlap region is less than or equal to 2 μm.

5. The display panel according to claim 4, wherein: The filter unit includes: a red filter unit, a green filter unit and a blue filter unit; The organic light-emitting layer includes: a red organic light-emitting unit, a green organic light-emitting unit and a blue organic light-emitting unit; The red filter unit is arranged corresponding to the red organic light emitting unit, the green filter unit is arranged corresponding to the green organic light emitting unit, and the blue filter unit is arranged corresponding to the blue organic light emitting unit.

6. The display panel according to claim 5, wherein: The area of ​​the red filter unit is larger than that of the red organic light emitting unit, the area of ​​the green filter unit is larger than that of the green organic light emitting unit, and the area of ​​the blue filter unit is larger than that of the blue organic light emitting unit.

7. The display panel according to claim 4, wherein: The display panel further includes: an encapsulation layer, the encapsulation layer is located between the filter layer and the black composite pixel definition layer, and the encapsulation layer is used to encapsulate the light emitting device; wherein The filter layer is fixedly connected to the packaging layer via optical glue.

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

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