Display panel and display device

Abstract

Embodiments of the present application provide a display panel and a display device, wherein the display panel comprises a plurality of pixel units, each of the pixel units comprising a light emitting device, an inner filter layer and an outer filter layer; the light emitting device at least partially surrounds the inner filter layer; the outer filter layer at least partially surrounds the light emitting device; and the color of the inner filter layer is consistent with that of the outer filter layer in the same pixel unit. The pixel unit of the present application adopts a three-layer structure, and the inner and outer filter layers surround the inner side and the outer side of the light emitting device respectively, which is conducive to the thinning of the display panel. Meanwhile, the light emitting device is arranged in a hollow structure and filled with the inner filter layer, thereby increasing the light utilization rate and the light emitting area. The problems of the existing Micro LED, such as small light emitting area, are effectively solved.

Description

TECHNICAL FIELD

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

[0002] Micro LED (Micro Light Emitting Diode) is a micron-scale light emitting device. Compared with OLED (Organic Light Emitting Diode), Micro LED has higher color gamut / luminance and lower power consumption, and has the same long service life as LCD (Liquid Crystal Display) and the characteristics of self-luminous without backlight. Therefore, Micro LED is expected to become the next generation of display technology due to its better energy saving, simple structure, small size, thinness and other advantages.

[0003] The Micro LED display panel adopts blue Micro LED + QD (Quantum Dot) for light emission. QD has many characteristics such as high color purity, which can effectively improve the color gamut of the display panel and make up for the problem of low efficiency of red Micro LED and green Micro LED in addition to blue Micro LED. In the existing Micro LED display panel, the QD layer is arranged on the side of the Micro LED facing the light-emitting surface of the display panel. In order to increase the utilization rate of light, the QD needs to be arranged to be thicker. However, the thicker QD layer is not conducive to the thinness of the display panel.

[0004] CONTENT

[0005] Therefore, the display panel and the display device provided in the embodiments of the present application can improve the problem that the quantum dot layer in the existing display panel and display device increases the thickness of the display panel.

[0006] In a first aspect, the embodiments of the present application provide a display panel, comprising a plurality of pixel units, each pixel unit comprising: a light emitting device, an inner filter layer and an outer filter layer; wherein the light emitting device at least partially surrounds the inner filter layer; the outer filter layer at least partially surrounds the light emitting device; and the color of the inner filter layer is consistent with the color of the outer filter layer in the same pixel unit.

[0007] In an implementation form of the first aspect, the pixel unit further comprises: a first reflective layer, the first reflective layer being arranged on the side of at least one of the light emitting device, the inner filter layer and the outer filter layer away from the light-emitting surface of the display panel.

[0008] In an implementation form of the first aspect, the pixel unit further comprises: a first electrode and a second electrode, the first electrode being electrically connected to the anode of the light emitting device and the second electrode being electrically connected to the cathode of the light emitting device; and at least one of the first electrode and the second electrode is multiplexed as the first reflective layer.

[0009] In an implementation form of the first aspect, the pixel unit further includes a second reflective layer, the second reflective layer is arranged on a side of the light emitting device facing the light exit surface of the display panel; and a projection of the second reflective layer along the first direction does not overlap with a projection of the inner filter layer and a surface of the outer filter layer on a side facing the light exit surface of the display panel along the first direction, the first direction being a direction perpendicular to a plane in which the display panel is located.

[0010] In an implementation form of the first aspect, the pixel unit further includes a first electrode and a second electrode, the first electrode is electrically connected to the anode of the light emitting device and the second electrode is electrically connected to the cathode of the light emitting device; one of the first electrode and the second electrode is multiplexed as the first reflective layer, and the other is multiplexed as the second reflective layer.

[0011] In an implementation form of the first aspect, a projection of the light emitting device along the first direction has a shape of at least one of a circular ring, a rectangular ring, and a triangular ring.

[0012] In an implementation form of the first aspect, the outer filter layer surrounds the light emitting device.

[0013] In an implementation form of the first aspect, at least one of the inner filter layer and the outer filter layer includes quantum dots.

[0014] In an implementation form of the first aspect, the pixel units include a first pixel unit and a second pixel unit; the light emitting device included in the first pixel unit and the second pixel unit has the same color; the inner filter layer included in the first pixel unit and the second pixel unit has different colors; and the outer filter layer included in the first pixel unit and the second pixel unit has different colors.

[0015] In an implementation form of the first aspect, the pixel unit further includes a bottom filter layer, the bottom filter layer is located on a side of the light emitting device facing away from the light exit surface of the display panel.

[0016] In a second aspect, the present application provides a display device including the display panel.

[0017] In the embodiments of the present application, the pixel unit adopts a three-layer structure, the inner and outer filter layers surround the inner and outer sides of the light emitting device respectively, which is conducive to the thinning of the display panel, and the light emitting device is arranged in a hollow structure and filled with the inner filter layer, thereby increasing the light utilization rate and light exit area of the pixel unit. The problems of small light exit area of the existing Micro LED are effectively solved. BRIEF DESCRIPTION OF DRAWINGS

[0018] To more clearly illustrate the technical solutions of the embodiments of this application, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0019] Figure 1 A schematic diagram of a display panel provided in an embodiment of this application;

[0020] Figure 2 for Figure 1 A partial schematic diagram of the CC region;

[0021] Figure 3 for Figure 2 A cross-sectional schematic diagram of a mid-pixel unit;

[0022] Figure 4 A schematic diagram of a pixel unit provided in an embodiment of this application;

[0023] Figure 5 A schematic diagram of a pixel unit provided in an embodiment of this application;

[0024] Figure 6 A cross-sectional schematic diagram of a pixel unit provided in an embodiment of this application;

[0025] Figure 7 A cross-sectional schematic diagram of a pixel unit provided in an embodiment of this application;

[0026] Figure 8 A cross-sectional schematic diagram of a pixel unit provided in an embodiment of this application;

[0027] Figure 9 A cross-sectional schematic diagram of a pixel unit provided in an embodiment of this application;

[0028] Figure 10 A cross-sectional schematic diagram of a pixel unit provided in an embodiment of this application;

[0029] Figure 11 A cross-sectional schematic diagram of a pixel unit provided in an embodiment of this application;

[0030] Figure 12 A schematic diagram of a pixel unit provided in an embodiment of this application;

[0031] Figure 13 A schematic diagram of a pixel unit provided in an embodiment of this application;

[0032] Figure 14 A schematic diagram of a pixel unit provided in an embodiment of this application;

[0033] Figure 15 A schematic diagram of a pixel unit provided in an embodiment of the present application;

[0034] Figure 16 A schematic diagram of a cross-section of a pixel unit provided in an embodiment of the present application;

[0035] Figure 17 A schematic diagram of a cross-section of a pixel unit provided in an embodiment of the present application;

[0036] Figure 18 A schematic diagram of a display device provided in an embodiment of the present application.

[0037] Explanation of signs

[0038] 100, display panel; 120, pixel unit; 121, light emitting device; 122, inner filter layer; 123, outer filter layer; 124, first reflective layer; 125, second reflective layer; 126, first electrode; 127, second electrode; 128, black pixel definition layer; 129, bottom filter layer; 1210, first pixel unit; 1220, second pixel unit; 1230, third pixel unit.

DETAILED DESCRIPTION

[0039] In order to better understand the technical solutions of the present application, the embodiments of the present application are described in detail below with reference to the drawings.

[0040] It should be clear that the described embodiments are only some of the embodiments of the present application, but not all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative labor fall within the scope of protection of the present application.

[0041] The terms used in the embodiments of the present application are only for the purpose of describing the specific embodiments, and are not intended to limit the present application. The singular forms "a", "an" and "the" used in the embodiments of the present application and the appended claims are also intended to include the plural forms, unless the context clearly indicates otherwise.

[0042] It should be understood that the term "and / or" used herein is only to describe the association relationship of the associated objects, which means that there can be three relationships, for example, A and / or B, which can represent the three cases of A alone, A and B together, and B alone. In addition, the character " / " in this paper generally represents that the front and rear associated objects are a "or" relationship.

[0043] In the description of this specification, it should be understood that the terms "substantially", "approximately", "about", "about", "generally", "largely" used in the claims and embodiments of this application refer to values ​​that can be generally agreed upon within a reasonable range of process operations or tolerances, rather than a precise value.

[0044] It should be understood that although terms such as first, second, third, etc., may be used to describe regions in the embodiments of this application, these regions should not be limited to these terms. These terms are only used to distinguish regions from each other. For example, without departing from the scope of the embodiments of this application, a first region may also be referred to as a second region, and similarly, a second region may also be referred to as a first region.

[0045] Through meticulous and in-depth research, the applicant in this case has provided a solution to the problems existing in the prior art.

[0046] Figure 1 A schematic diagram of a display panel provided in an embodiment of this application; Figure 2 for Figure 1 A partial schematic diagram of the CC region; Figure 3 for Figure 2 A cross-sectional view of a mid-pixel unit. It should be noted that... Figure 3 The diagram shows a cross-sectional view of pixel unit 120 (1210), and the cross-sectional structures of other pixel units 120 (1220) and 120 (1230) are also shown in the diagram. Figure 3 As shown.

[0047] like Figure 1 As shown, the display panel 100 provided in this embodiment includes a display area AA and a non-display area NA. The display area AA is used for display, and the non-display area NA is used for setting peripheral circuits, etc. Figure 1 , Figure 2 and Figure 3 The display area AA includes several pixel units 120, which are arranged within the display area AA.

[0048] refer to Figure 2 and Figure 3 Pixel unit 120 includes a light-emitting device 121, an inner filter layer 122, and an outer filter layer 123. The light-emitting device 121 at least partially surrounds the inner filter layer 122, and the outer filter layer 123 at least partially surrounds the light-emitting device 121. Within the same pixel unit 120, the inner filter layer 122 and the outer filter layer 123 have the same color.

[0049] The light emitting device 121 is configured to emit light, and can be a blue light Micro LED. The light emitted by the light emitting device 121 is incident on the inner filter layer 122 and the outer filter layer 123, respectively, so that the inner filter layer 122 and the outer filter layer 123 emit light of a color required by the pixel unit 120 in which the inner filter layer 122 and the outer filter layer 123 are located, and at least part of the light is emitted outwards through the light emitting surface of the display panel 100.

[0050] The present application increases the utilization rate of light by arranging filter layers on both the inner and outer sides of the light emitting device 121. In addition, the inner filter layer 122 is arranged on the inner side surrounded at least partially by the light emitting device 121, so that the middle region of the pixel unit 120 serves as a light emitting region, thereby increasing the light emitting area of the pixel unit 120 and improving the light emitting efficiency. At the same time, the number of light rays emitted at zero viewing angle can be increased, effectively solving the problem of attenuation at zero viewing angle. In addition, the shape of the light emitting device 121 at least partially surrounds the inner filter layer 122, so that the projection of the light emitting device 121 along the thickness direction of the display panel 100 has a relatively long extension length. On the premise of ensuring the light emitting amount of the light emitting device 121, the width of the projection of the light emitting device 121 along the thickness direction of the display panel 100 can be relatively narrow. Therefore, the light emitted by the inner filter layer 122 and the outer filter layer 123 towards the light emitting surface side of the display panel 100 can be mixed by the light emitting device 121 towards the light emitting surface side of the display panel 100, so that the light emitting device 121 is basically not perceived by the human eye.

[0051] Please refer to Figure 2 In an embodiment of the present application, the pixel units 120 include a first pixel unit 1210, a second pixel unit 1220, and a third pixel unit 1230. The first pixel unit 1210 can be a red light emitting pixel unit, the second pixel unit 1220 can be a green light emitting pixel unit, and the third pixel unit 1230 can be a blue light emitting pixel unit. The first pixel unit 1210, the second pixel unit 1220, and the third pixel unit 1230 are arranged in order to form three primary color pixel units of the display panel 100. The arrangement mode of the first pixel unit 1210, the second pixel unit 1220, and the third pixel unit 1230 can be a triangular arrangement, a linear arrangement, or other forms of arrangement.

[0052] The light-emitting colors of the light-emitting devices 121 included in the first pixel unit 1210, the second pixel unit 1220, and the third pixel unit 1230 can be the same, and can specifically be blue light Micro LED. In order to realize that the first pixel unit 1210, the second pixel unit 1220, and the third pixel unit 1230 emit light of different colors, the colors of the inner filter layers 122 included in the first pixel unit 1210, the second pixel unit 1220, and the third pixel unit 1230 are different, and the colors of the outer filter layers 123 included in the first pixel unit 1210, the second pixel unit 1220, and the third pixel unit 1230 are different.

[0053] In order to distinguish that the first pixel unit 1210, the second pixel unit 1220, and the third pixel unit 1230 respectively fill the inner filter layers 122 in the first pixel unit 1210, the second pixel unit 1220, and the third pixel unit 1230 into different patterns, and respectively fill the outer filter layers 123 in the first pixel unit 1210, the second pixel unit 1220, and the third pixel unit 1230 into different patterns.

[0054] Specifically, the inner filter layer 122 and the outer filter layer 123 of the first pixel unit 1210 emit red light after receiving the light emitted by the light-emitting device 121 between the two, the inner filter layer 122 and the outer filter layer 123 of the second pixel unit 1220 emit green light after receiving the light emitted by the light-emitting device 121 between the two, and the inner filter layer 122 and the outer filter layer 123 of the third pixel unit 1230 emit blue light after receiving the light emitted by the light-emitting device 121 between the two.

[0055] When the light-emitting devices 121 included in the first pixel unit 1210, the second pixel unit 1220, and the third pixel unit 1230 are all the same light-emitting devices 121 that emit light of the same color, all the light-emitting devices 121 are manufactured in the same process technology, which simplifies the process flow and reduces the process difficulty; and the light-emitting efficiency of the blue light Micro LED is high.

[0056] In an embodiment of the present application, at least one of the inner filter layer 122 and the outer filter layer 123 includes quantum dots. For example, the inner filter layer 122 and the outer filter layer 123 are both quantum dot layers.

[0057] When the first pixel unit 1210, the second pixel unit 1220, and the third pixel unit 1230 are pixel units that emit red light, green light, and blue light respectively, the inner filter layer 122 and the outer filter layer 123 in the first pixel unit 1210 can be red quantum dot layers, the inner filter layer 122 and the outer filter layer 123 in the second pixel unit 1220 can be green quantum dot layers, and the inner filter layer 122 and the outer filter layer 123 in the third pixel unit 1230 can be blue quantum dot layers.

[0058] Figure 4 This is a planar schematic diagram of a pixel unit provided in an embodiment of this application.

[0059] like Figure 2 As shown, the inner filter layer 122 can be surrounded by the light-emitting device 121.

[0060] Or, such as Figure 4 As shown, the inner light filter layer 122 can be partially surrounded by the light-emitting device 121. For example, the light-emitting device 121 may surround the inner light filter layer 122 on three sides. Since the size of the pixel unit 120 and the size of the light-emitting device 121 are mostly on the order of micrometers, it is relatively easy to configure the light-emitting device 121 to partially surround the inner light filter layer 122 in the manufacturing process. Therefore, the solution of this embodiment can be adopted for some display panels 100 with low process requirements.

[0061] like Figure 2 and Figure 4 As shown, the outer filter layer 123 can surround the light-emitting device 121. Alternatively, the outer filter layer 123 can partially surround the light-emitting device 121.

[0062] Please see Figure 5 , Figure 5 This is another cross-sectional view of the pixel unit provided in an embodiment of this application. In one embodiment of this application, the cavity formed by the light-emitting device 121 for at least partially surrounding the inner light filter layer 122 is not through-hole along the direction perpendicular to the plane of the display panel 100. Therefore, the bottom of the light-emitting device 121 and the inner light filter layer 122 form an upper and lower structure, so that the light emitted by the light-emitting device 121 can be used to excite more of the inner light filter layer 122 to emit light within a limited space.

[0063] In one embodiment of this application, as Figure 3 As shown, along a direction perpendicular to the plane of the display panel 100, the light-emitting device 121 forms an inner cavity that at least partially surrounds the inner light filter layer 122. This embodiment can reduce the difficulty of the manufacturing process and the precision requirements of the process, thus saving costs. Figure 6 This is a cross-sectional schematic diagram of a pixel unit provided in an embodiment of this application; Figure 7 A cross-sectional schematic diagram of a pixel unit provided in an embodiment of this application;Figure 8 A cross-sectional schematic diagram of a pixel unit provided in an embodiment of this application; Figure 9 A cross-sectional schematic diagram of a pixel unit provided in an embodiment of this application;

[0064] Figure 10 A cross-sectional schematic diagram of a pixel unit provided in an embodiment of this application; Figure 11 This is a cross-sectional schematic diagram of a pixel unit provided in an embodiment of this application.

[0065] In one embodiment of this application, the pixel unit 120 further includes a first reflective layer 124, which is disposed on the side of at least one of the light-emitting device 121, the inner filter layer 122, and the outer filter layer 123 that is away from the light-emitting surface of the display panel 100.

[0066] For example, please see Figure 6 The first reflective layer 124 is located on the side of the light-emitting device 121 that is away from the light-emitting surface of the display panel 100. The first reflective layer 124 reflects the light emitted by the light-emitting device 121 that is away from the light-emitting surface of the display panel 100, allowing more light to enter the inner filter layer 122 and the outer filter layer 123, thereby improving the utilization rate of light; at the same time, it can block light from entering the circuit below the light-emitting device 121, thus avoiding affecting the operation of the transistors in the circuit.

[0067] For example, please see Figure 7 The first reflective layer 124 is located on the side of the inner light filter layer 122 that is away from the light-emitting surface of the display panel 100. The first reflective layer 124 reflects the light in the inner light filter layer 122 that is away from the light-emitting surface of the display panel 100, so that more light is emitted from the light-emitting surface of the display panel 100.

[0068] For example, please see Figure 8 The first reflective layer 124 is located on the side of the outer light filter layer 123 that is away from the light-emitting surface of the display panel 100. The first reflective layer 124 reflects the light in the outer light filter layer 123 that is away from the light-emitting surface of the display panel 100, so that more light is emitted from the light-emitting surface of the display panel 100.

[0069] For example, please see Figure 9 The first reflective layer 124 is located on the side of the inner light filter layer 122 and the outer light filter layer 123 that is away from the light-emitting surface of the display panel 100. The first reflective layer 124 reflects the light in the inner light filter layer 122 and the outer light filter layer 123 that is away from the light-emitting surface of the display panel 100, so that more light is emitted from the light-emitting surface of the display panel 100, thereby increasing the luminous efficiency.

[0070] For example, please see Figure 3The first reflective layer 124 is located on the side of the light emitting device 121 and the outer filter layer 123 away from the light emitting surface of the display panel 100. The first reflective layer 124 reflects the light emitted by the light emitting device 121 and the outer filter layer 123 away from the light emitting surface of the display panel 100, so that more light is emitted from the light emitting surface of the display panel 100.

[0071] For example, refer to Figure 10 The first reflective layer 124 is located on the side of the light emitting device 121 and the outer filter layer 123 away from the light emitting surface of the display panel 100. The first reflective layer 124 reflects the light emitted by the light emitting device 121 and the outer filter layer 123 away from the light emitting surface of the display panel 100, so that more light is emitted from the light emitting surface of the display panel 100.

[0072] For example, refer to Figure 11 In an embodiment of the present application, the first reflective layer 124 is located on the side of the light emitting device 121, the inner filter layer 122 and the outer filter layer 123 away from the light emitting surface of the display panel 100, and the projection of the first reflective layer 124 in the direction perpendicular to the plane of the display panel covers the light emitting device 121, the inner filter layer 122 and the outer filter layer 123. Therefore, the first reflective layer 124 can reflect light to the maximum extent and improve light utilization.

[0073] For example, refer to Figure 3 , Figure 6 and Figure 11 In an embodiment of the present application, the pixel unit 120 further includes a first electrode 126 and a second electrode 127. The first electrode 126 is electrically connected to the anode of the light emitting device 121, and the second electrode 127 is electrically connected to the cathode of the light emitting device 121. The first electrode 126 and the second electrode 127 are respectively connected to the corresponding driving circuit and signal line to realize power supply to the light emitting device 121 and make the light emitting device 121 self-luminescence. At least one of the first electrode 126 and the second electrode 127 is multiplexed as the first reflective layer 124.

[0074] For example, refer to Figure 11 In an embodiment of the present application, the first electrode 126 is located at a position away from the light emitting surface of the display panel 100 in the pixel unit 120, and the second electrode 127 is located at a position close to the light emitting surface of the display panel 100 in the pixel unit 120. The first electrode 126 can be multiplexed as the first reflective layer 124. Multiplexing the first electrode 126 as the first reflective layer 124 can effectively reduce the number of masks used in the manufacturing process, reduce production costs, simplify process difficulty, and effectively ensure light utilization and luminous efficiency.

[0075] In an embodiment of the present application, as Figure 6As shown, the first electrode 126 and the second electrode 127 are both located in the pixel unit 120 away from the light-out surface of the display panel 100, and the first electrode 126 and the second electrode 127 are separated and insulated. Among them, the first electrode 126 and the second electrode 127 are both multiplexed as the first light-reflecting layer 124, and the first electrode 126 and the second electrode 127 are arranged on the same side of the light-emitting device 121, which can effectively save the thickness of the pixel unit 120 along the first direction (i.e. the direction perpendicular to the plane where the display panel 100 is located), and is conducive to the thinning of the display panel 100. At the same time, multiplexing the first electrode 126 and the second electrode 127 as the first light-reflecting layer 124 can effectively reduce the number of times of using the mask in the manufacturing process, reduce the production cost, simplify the process difficulty, and also effectively ensure the light utilization rate and the light-emitting efficiency.

[0076] As shown in the embodiment of the present application, Figure 11 the pixel unit 120 further comprises a second light-reflecting layer 125 arranged on the side of the light-emitting device 121 facing the light-out surface of the display panel 100. The second light-reflecting layer 125 does not overlap with the normal projection of the inner light-filter layer 122 and the surface of the outer light-filter layer 123 facing the light-out surface of the display panel 100 along the first direction, and the first direction is perpendicular to the plane where the display panel 100 is located. The function of the second light-reflecting layer 125 is to reflect the light emitted by the light-emitting device 121 towards the light-out surface of the display panel 100, so as to avoid the direct emission of this part of light, and at the same time, to increase the light entering the inner light-filter layer 122 and the outer light-filter layer 123.

[0077] As shown in the embodiment of the present application, Figure 11 the pixel unit 120 further comprises a first electrode 126 and a second electrode 127, the first electrode 126 is electrically connected to the anode of the light-emitting device 121, and the second electrode 127 is electrically connected to the cathode of the light-emitting device 121. The first electrode 126 is located in the pixel unit 120 away from the light-out surface of the display panel 100, and the second electrode 127 is located in the pixel unit 120 close to the light-out surface of the display panel 100.

[0078] Among them, one of the first electrode 126 and the second electrode 127 is multiplexed as the first light-reflecting layer 124, and the other is multiplexed as the second light-reflecting layer 125. Multiplexing one of the first electrode 126 and the second electrode 127 as the first light-reflecting layer 124 and the other as the second light-reflecting layer 125 can effectively reduce the number of times of using the mask in the manufacturing process, reduce the production cost, simplify the process difficulty, and also effectively ensure the light utilization rate and the light-emitting efficiency.

[0079] Figure 12 A schematic diagram of the pixel unit provided by the embodiment of the present application; Figure 13A schematic view of a pixel unit provided by an embodiment of the present application; Figure 14 A schematic view of a pixel unit provided by an embodiment of the present application; Figure 15 A schematic view of a pixel unit provided by an embodiment of the present application.

[0080] Please refer to Figure 2 , Figure 12 and Figure 13 In an embodiment of the present application, the shape of the orthographic projection of the light emitting device 121 along the first direction comprises at least one of a circular ring, a rectangular ring, an elliptical ring or a triangular ring. It should be noted that the shape of the orthographic projection of the surface of the light emitting device 121 facing the light emitting surface of the display panel 100 along the first direction is at least one of a circular ring, a rectangular ring, an elliptical ring or a triangular ring.

[0081] For example, as shown in Figure 2 , the shape of the orthographic projection of the light emitting device 121 along the first direction comprises a rectangular ring, and the area surrounded by the rectangular ring is filled with the inner filter layer 122. The outer periphery of the rectangular ring is provided with the outer filter layer 123.

[0082] For example, as shown in Figure 12 , the shape of the orthographic projection of the light emitting device 121 along the first direction is a circular ring, the area surrounded by the circular ring is filled with the inner filter layer 122, and the circular ring is surrounded by the outer filter layer 123, the shape of the orthographic projection of the outer filter layer 123 along the first direction can also be a circular ring, and the outer periphery of the outer filter layer 123 is surrounded by the black pixel definition layer. This structure can increase the contact area of the light emitting device 121 with the inner filter layer 122 and the outer filter layer 123 in the effective space, which is conducive to improving the utilization rate of light.

[0083] For example, as shown in Figure 13 , the shape of the orthographic projection of the light emitting device 121 along the first direction can also be an elliptical ring, the area surrounded by the elliptical ring is filled with the inner filter layer 122, and the elliptical ring is surrounded by the outer filter layer 123, the shape of the orthographic projection of the outer filter layer 123 along the first direction can also be an elliptical ring, and the outer periphery of the outer filter layer 123 is surrounded by the black pixel definition layer. This structure can increase the contact area of the light emitting device 121 with the inner filter layer 122 and the outer filter layer 123 in the effective space, which is conducive to improving the utilization rate of light.

[0084] For example, as shown in Figure 14 , the shape of the orthographic projection of the light emitting device 121 along the first direction can also be a triangular ring, the area surrounded by the triangular ring is filled with the inner filter layer 122, and the outer periphery of the triangular ring is provided with the outer filter layer 123.

[0085] Please refer to Figure 15The outer edge of the light-emitting device 121 in the orthographic projection along the first direction is rectangular, and the inner edge is circular. The area surrounded by the inner edge is filled with the inner filter layer 122, and the outer periphery of the outer edge is provided with the outer filter layer 123. Therefore, the contact surface of the outer filter layer 123 and the light-emitting device 121 is a plane, which is beneficial to the propagation of light and can effectively prevent refraction of light during propagation. The contact surface of the inner filter layer 122 and the light-emitting device 121 is a curved surface, which can improve the space utilization and ensure the light utilization.

[0086] Referring to Figure 2 In an embodiment of the present application, the outer filter layer 123 surrounds the light-emitting device 121, and the outer filter layer 123 completely surrounds the light-emitting device 121. Therefore, the outer filter layer 123 can maximize the reception of light emitted by the outer sidewall of the light-emitting device 121, which is beneficial to improving the light-emitting efficiency of the pixel unit 120. At the same time, the outer filter layer 123 surrounding the light-emitting device 121 is beneficial to the thinning of the display panel 100.

[0087] Referring to Figure 2 and Figure 11 In an embodiment of the present application, the contact surface of the inner filter layer 122 and the light-emitting device 121 is parallel to the first direction, and the first direction is a direction perpendicular to the plane in which the display panel 100 is located. The contact surface between the inner filter layer 122 and the light-emitting device 121 is perpendicular to the plane in which the display panel 100 is located, which can reduce the process difficulty and control the production cost. The inner filter layer 122 is arranged on the inner side of the light-emitting device 121, which can increase the light-emitting area and also increase the amount of light emitted at 0° viewing angle.

[0088] Referring to Figure 11 In an embodiment of the present application, the included angle between the contact surface of the outer filter layer 123 and the light-emitting device 121 and the first direction is an acute angle, and the contact surface of the outer filter layer 123 and the light-emitting device 121 is inclined from the end close to the light-emitting surface of the display panel 100 to the end away from the light-emitting surface of the display panel 100. The inclination of the contact surface of the outer filter layer 123 and the light-emitting device 121 from the end close to the light-emitting surface of the display panel 100 to the end away from the light-emitting surface of the display panel 100 can effectively increase the contact area of the outer filter layer 123 and the light-emitting device 121, improve the light utilization, and also be beneficial to exciting the quantum dots in the inner filter layer 122 and the outer filter layer 123, thereby improving the light-emitting efficiency.

[0089] Figure 16 A sectional view of a pixel unit provided in an embodiment of the present application is shown in the figure; Figure 17 A sectional view of a pixel unit provided in an embodiment of the present application is shown in the figure.

[0090] Referring to Figure 16 and Figure 17In an embodiment of the present application, the pixel unit 120 further comprises a bottom filter layer 129, which is located on the side of the light emitting device 121 away from the light emitting surface of the display panel 100. In the same pixel unit 120, the color of the bottom filter layer 129 is the same as that of the inner filter layer 122 and the outer filter layer 123. The bottom filter layer 129 is located on the side of the light emitting device 121 away from the light emitting surface of the display panel, which can effectively utilize the light source on the side of the light emitting device 121 away from the light emitting surface of the display panel and excite the bottom filter layer 129 to emit light, thereby further improving the light utilization rate. The bottom filter layer 129 is in contact with the inner filter layer 122 and the outer filter layer 123, respectively. The first reflective layer 124 is located on the side of the bottom filter layer 129 away from the light emitting surface of the display panel 100.

[0091] Please refer to Figure 2 In an embodiment of the present application, the pixel unit 120 further comprises a black pixel definition layer 128, which surrounds the outer periphery of the outer filter layer 123 and is located on the side of the inner filter layer 122 away from the light emitting surface of the display panel 100 or on the side of the bottom filter layer 129 away from the light emitting surface of the display panel 100. The black pixel definition layer 128 can effectively organize light to emit from the non-light emitting surface, ensure the color gamut of light, and prevent light from occurring cross talk.

[0092] Please refer to Figure 16 In an embodiment of the present application, the contact surface between the black pixel definition layer 128 and the outer filter layer 123 forms an acute angle with the first direction, and the contact surface between the black pixel definition layer 128 and the outer filter layer 123 is inclined from the side close to the light emitting surface of the display panel 100 to the side away from the light emitting surface of the display panel 100. Therefore, the contact area between the black pixel definition layer 128 and the outer filter layer 123 is increased, and the light can be better prevented from leaking to the non-light emitting surface of the display panel 100.

[0093] In the present application, the light emitting device 121 is made into a "back" type structure, the filter layers are arranged on the inner side and the outer side of the light emitting device, and the first reflective layer and the second reflective layer are arranged on the pixel unit to prevent the light emitted by the light emitting device from occurring cross talk with the light emitted by the inner filter layer or the outer filter layer. At the same time, the middle region of the pixel unit is used as a light emitting region, which not only increases the light emitting area of the pixel unit but also effectively solves the problem of light attenuation at zero viewing angle.

[0094] Please refer to Figure 18 , Figure 18A schematic diagram of a display device provided by an embodiment of the present application is shown. The present application also provides a display device 200 comprising a display panel 100. The display device provided by the embodiment of the present application can be a mobile phone. In addition, the display device provided by the embodiment of the present application can also be a computer, a television or other electronic product. In the display device 200, the utilization rate of light is increased by arranging the light filtering layers on both the inner and outer sides of the light emitting device 121, and the middle region of the pixel unit 120 is used as the light emitting region due to the arrangement of the inner light filtering layer 122 on the inner side surrounded by the light emitting device 121, so that the light emitting area of the pixel unit 120 is increased, the light emitting efficiency is improved, and the number of light rays emitted at the zero-degree viewing angle is increased, effectively solving the problem of attenuation at the zero-degree viewing angle.

[0095] The above merely provides the preferred embodiments of the present application and is not intended to limit the present application. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the scope of protection of the present application.

Claims

1. A display panel, characterized by, The display panel comprises a plurality of pixel units, each of the pixel units comprising: a light-emitting device; an inner filter layer, the light-emitting device surrounding the inner filter layer; an outer filter layer, the outer filter layer surrounding the light-emitting device; wherein the color of the inner filter layer and the color of the outer filter layer are consistent in the same pixel unit.

2. The display panel of claim 1, wherein, The pixel unit further comprises a first reflective layer, the first reflective layer being disposed on a side of at least one of the light-emitting device, the inner filter layer, and the outer filter layer that faces away from a light-outcoming surface of the display panel.

3. The display panel of claim 2, wherein, The pixel unit further comprises a first electrode and a second electrode, the first electrode being electrically connected to an anode of the light-emitting device and the second electrode being electrically connected to a cathode of the light-emitting device. At least one of the first electrode and the second electrode is multiplexed as the first reflective layer.

4. The display panel of claim 2, wherein, The pixel unit further comprises a second reflective layer, the second reflective layer being disposed on a side of the light-emitting device that faces the light-outcoming surface of the display panel. A projection of the second reflective layer along a first direction does not overlap with a projection of a surface of the inner filter layer and the outer filter layer that faces the light-outcoming surface of the display panel along the first direction, the first direction being a direction perpendicular to a plane on which the display panel is located.

5. The display panel of claim 4, wherein, The pixel unit further comprises a first electrode and a second electrode, the first electrode being electrically connected to an anode of the light-emitting device and the second electrode being electrically connected to a cathode of the light-emitting device. One of the first electrode and the second electrode is multiplexed as the first reflective layer, and the other one is multiplexed as the second reflective layer.

6. The display panel of claim 1, wherein, A shape of a projection of the light-emitting device along a first direction comprises at least one of a circular ring, a rectangular ring, and a triangular ring, the first direction being a direction perpendicular to a plane on which the display panel is located.

7. The display panel of claim 1, wherein, At least one of the inner filter layer and the outer filter layer comprises quantum dots.

8. The display panel of claim 7, wherein, The plurality of pixel units comprises a first pixel unit and a second pixel unit. The color of the light-emitting device included in the first pixel unit and the second pixel unit is the same, the color of the inner filter layer included in the first pixel unit and the second pixel unit is different, and the color of the outer filter layer included in the first pixel unit and the second pixel unit is different.

9. The display panel of claim 1, wherein, The pixel unit further comprises a bottom filter layer, the bottom filter layer being disposed on a side of the light-emitting device that faces away from the light-outcoming surface of the display panel.

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

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