Display panel and display device

Abstract

The present application relates to the technical field of display panels, and the present application discloses a display panel and a display device. The display panel includes a backplane layer, a first light absorbing layer and a light emitting layer stacked in sequence; the backplane layer facing the light emitting layer includes a plurality of driving units and a wiring unit located between two adjacent driving units; the light emitting layer includes a plurality of light emitting units and a first light shielding unit located between two adjacent light emitting units; the light emitting unit and the driving unit overlap in the orthographic projection formed on the surface of the backplane layer, and the first light shielding unit overlaps in the orthographic projection formed on the backplane layer; the first light absorbing layer includes a plurality of light absorbing units arranged in an array, and the light absorbing unit is arranged between the wiring unit and the first light shielding unit. Compared with the prior art, it can reduce crosstalk and light leakage between pixels while maintaining display brightness.

Description

Technical Field

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

[0002] With the development of display panel technology, higher requirements are placed on the resolution and brightness of display images. In display panels, high light reflection often occurs between the light-emitting layer and the QD color conversion layer and between the light-emitting layer and the backplane layer, which causes crosstalk and light leakage problems between pixels. Existing technologies often sacrifice the brightness of the display panel to avoid crosstalk and light leakage, which reduces the overall display effect of the display panel. Summary of the invention

[0003] In order to solve the technical problems of crosstalk and light leakage between pixels of a display panel, the main purpose of the present application is to provide a display panel and a display device that can reduce crosstalk and light leakage between pixels while maintaining display brightness.

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

[0005] According to one aspect of the present application, a display panel is provided, comprising a backplane layer, a first light absorbing layer and a light emitting layer stacked in sequence;

[0006] The backplane layer includes a plurality of driving units and a wiring unit located between two adjacent driving units on the side facing the LED light-emitting layer;

[0007] The LED light-emitting layer includes a plurality of light-emitting units and a first shading unit located between two adjacent light-emitting units; the orthographic projections formed by the light-emitting units and the driving units on the surface of the backplane layer overlap, and the orthographic projections formed by the first shading unit and the wiring unit on the backplane layer overlap;

[0008] The first light absorbing layer includes a plurality of light absorbing units arranged in an array, and the light absorbing units are arranged between the wiring unit and the first light shielding unit;

[0009] The QD color conversion layer includes a plurality of color conversion units and a second shading unit located between adjacent color conversion units. The spacing area between adjacent light absorbing units overlaps with the orthographic projection formed by the color conversion unit on the surface of the backplane layer, and the second shading unit overlaps with the orthographic projection formed by the light absorbing unit on the surface of the backplane layer.

[0010] According to an embodiment of the present application, the light absorbing unit has a side wall facing the light emitting unit, and the side wall is provided with a light reflecting layer facing the light emitting unit.

[0011] According to one embodiment of the present application, in the cross section perpendicular to the backplane layer, the cross section of the light absorbing unit is trapezoidal, the two parallel sides of the trapezoidal cross section of the light absorbing unit face the LED light-emitting layer and the backplane layer respectively, and the side walls are arranged on the two waists of the trapezoidal cross section of the light absorbing unit.

[0012] According to one embodiment of the present application, there is a first angle α between the side wall and a normal line perpendicular to the surface of the backplane layer, wherein α is less than 10°.

[0013] According to an embodiment of the present application, it further includes a second light absorbing layer, and the second light absorbing layer is arranged on a side of the light absorbing unit facing the first light shielding unit.

[0014] According to one embodiment of the present application, the reflective layer is a metal layer, and the first light absorbing layer is a black matrix layer.

[0015] According to one embodiment of the present application, the reflective layer is a silver layer.

[0016] According to one embodiment of the present application, the backplane layer includes an electrode layer, and the electrode layer is arranged facing the LED light-emitting layer. In a direction perpendicular to the backplane layer, a first spacing distance H1 is provided between a side of the first light absorbing layer close to the LED light-emitting layer and a substrate of the backplane layer, and a second spacing distance H2 is provided between a side of the electrode layer close to the LED light-emitting layer and the substrate of the backplane layer, wherein H1>H2.

[0017] According to one embodiment of the present application, the backplane layer includes a circuit driving layer, a PLN layer, a first PVX layer and an electrode layer which are stacked in sequence, and the first light absorbing layer is arranged on a side of the electrode layer facing the LED light emitting layer.

[0018] According to one embodiment of the present application, in a direction perpendicular to the backplane layer, the thickness of the LED light-emitting layer (30) is D1, and the thickness of the first light-absorbing layer is D2, wherein D1≥D2.

[0019] According to an embodiment of the present application, in the orthographic projection direction of the backplane layer, the height between the side of each light absorbing unit facing the LED light-emitting layer and the substrate of the backplane layer is flush.

[0020] According to another aspect of the present application, a display device is provided, comprising the display panel.

[0021] It can be seen from the above technical solutions that the advantages and positive effects of the display panel and display device of the present application are:

[0022] The backplane layer includes a driving unit and a wiring unit, the LED light-emitting layer includes a light-emitting unit and a first shading unit, the wiring unit and the first shading unit overlap in orthographic projection formed on the surface of the backplane layer, the light-emitting unit and the driving unit overlap in orthographic projection formed on the surface of the backplane layer, the first light-absorbing layer includes a plurality of light-absorbing units arranged in an array, the light-absorbing unit is arranged between the wiring unit and the first shading unit, and then the crosstalk light between adjacent light-emitting units in the light-emitting layer can be absorbed by the light-absorbing unit, which can effectively avoid crosstalk caused by light reflected from the circuit metal in the wiring unit of the backplane layer, and can also avoid ambient light from irradiating the circuit metal in the wiring unit of the backplane layer and the light reflected by the QD color conversion layer, thereby further reducing the overall light reflection of the display panel and improving the display effect of the display panel. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the invention and, together with the description, serve to explain the principles of the invention.

[0024] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, for ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative labor.

[0025] Figure 1 A schematic diagram of a top cross-sectional structure of a backplane layer in a display panel provided in an embodiment of the present application;

[0026] Figure 2 A schematic diagram of the cross-sectional structure at AA of a backplane layer in a display panel provided in an embodiment of the present application;

[0027] Figure 3 A schematic diagram of a top cross-sectional structure of a backplane layer and a light-emitting layer in a display panel provided in an embodiment of the present application;

[0028] Figure 4 A schematic diagram of the BB cross-sectional structure of a backplane layer and a light-emitting layer in a display panel provided in an embodiment of the present application;

[0029] Figure 5 Another schematic diagram of the cross-sectional structure of the backplane layer and the BB in the light-emitting layer in a display panel provided in an embodiment of the present application;

[0030] Figure 6 A schematic diagram of the overall structure of a display panel provided in an embodiment of the present application;

[0031] Figure 7Another schematic diagram of the overall structure of a display panel provided in an embodiment of the present application;

[0032] Figure 8 A schematic diagram of the overall structure of a display panel in the prior art provided by this application;

[0033] Fig. 9 A schematic diagram of the film layer structure of a backplane layer in a display panel provided in an embodiment of the present application;

[0034] Fig.10 The present application provides a schematic diagram of a partial film layer structure of a backplane layer in a display panel in the prior art.

[0035] in:

[0036] 10. Backplane layer; 11. Driving unit; 12. Routing unit; 13. Electrode layer;

[0037] 20. first light absorbing layer; 21. light absorbing unit; 211. side wall; 22. spacing area;

[0038] 30. light-emitting layer; 31. light-emitting unit; 32. first light-shielding unit;

[0039] 40. Reflective layer;

[0040] α, first angle; H1, first spacing distance; H2, second spacing distance; D1, thickness of light emitting unit; D2, thickness of light absorbing layer;

[0041] 50. QD color conversion layer; 51. color conversion unit; 52. second light shielding unit;

[0042] 60. The second light absorbing layer. DETAILED DESCRIPTION

[0043] In order to make the purpose, technical solution and advantages of the embodiments of the present application clearer, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are 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 ordinary technicians in this field without making creative work are within the scope of protection of this application.

[0044] With the development of display panels, the market has put forward higher requirements for the display effect of display panels. In order to reduce the reflectivity of the light-emitting area of ​​the display panel, the traditional method is to apply a film on the backplane layer, which leads to a reduction in the brightness of the light-emitting area of ​​the display panel and cannot meet the use requirements of higher brightness. Most of the light reflection in the display panel causes crosstalk and light leakage between adjacent pixel components, reducing the use resolution of the display panel. In order to solve the technical problem of avoiding crosstalk and light leakage between adjacent pixel components while maintaining the brightness of the light-emitting area of ​​the display panel, a display panel and a display device are provided that can reduce crosstalk and light leakage of pixel components while maintaining the display brightness.

[0045] See also Figure 8 as well as Figure 1-Figure 5 As shown, according to one aspect of the present application, a display panel is provided, comprising a backplane layer 10, a first light absorbing layer 20 and an LED light emitting layer 30 stacked in sequence;

[0046] The side of the backplane layer 10 facing the LED light-emitting layer 30 includes a plurality of driving units 11 and a wiring unit 12 located between two adjacent driving units 11;

[0047] The LED light-emitting layer 30 includes a plurality of light-emitting units 31 and a first shading unit 32 located between two adjacent light-emitting units 31; the light-emitting units 31 overlap with the orthographic projections formed by the driving unit 11 on the surface of the backplane layer 10, and the first shading unit 32 overlaps with the orthographic projections formed by the wiring unit 12 on the backplane layer 10;

[0048] The first light absorbing layer 20 includes a plurality of light absorbing units 21 arranged in an array, and the light absorbing units 21 are disposed between the wiring unit 12 and the first light shielding unit 32;

[0049] The QD color conversion layer includes a plurality of color conversion units and a second light shading unit located between adjacent color conversion units. The spacing area between adjacent light absorbing units overlaps with the orthographic projection formed by the color conversion unit on the surface of the backplane layer, and the second light shading unit overlaps with the orthographic projection formed by the light absorbing unit on the surface of the backplane layer.

[0050] As an example, refer to Figure 8 As shown, the crosstalk light in the QD-LED display panel mainly includes the light reflected by the QD color conversion layer and irradiated to the metal wire area of ​​the backplane circuit. The metal wire area (equivalent to the routing unit 12 of this scheme) reflects the light reflected from a color conversion unit 51 to the surface and then reflects it into other color conversion units 51. The ambient light irradiates the metal wire area, causing crosstalk light between adjacent pixels, affecting the display effect of the display panel.

[0051] In this scheme, as an example, refer to Figure 1-5As shown, the backplane layer 10 includes a driving unit 11 and a wiring unit 12, the LED light-emitting layer 30 includes a light-emitting unit 31 and a first shading unit 32, the wiring unit 12 and the first shading unit 32 overlap in orthographic projection formed on the surface of the backplane layer 10, the light-emitting unit 31 overlaps in orthographic projection formed on the surface of the backplane layer 10, the first light-absorbing layer 20 includes a plurality of light-absorbing units 21 arranged in an array, the light-absorbing unit 21 is arranged between the wiring unit 12 and the first shading unit 32, and then the crosstalk light between adjacent light-emitting units 31 in the LED light-emitting layer 30 can be absorbed by the light-absorbing unit 21, which can effectively avoid the crosstalk caused by the reflected light of the circuit metal in the wiring unit 12 of the backplane layer 10, and at the same time, it can also avoid the ambient light from irradiating the circuit metal in the wiring unit 12 of the backplane layer 10, further reducing the overall light reflection of the display panel and improving the display effect of the display panel.

[0052] Since the reflected light is absorbed after being irradiated to the light absorbing unit 21, the probability of reflecting light from the light absorbing unit 21 to the adjacent light emitting unit 31 or to one side of the LED light emitting layer 30 is reduced. At the same time, since the light absorbing units 21 are distributed in an array on the back panel layer 10 and between the first shading unit 32 and the wiring unit 12, the brightness of the luminous display area formed between the driving unit 11 in the back panel layer 10 and the light emitting unit 31 in the LED light emitting layer 30 is not affected. There is no need to sacrifice the overall display brightness of the display panel, and the reflectivity of the non-luminous display area can be effectively reduced, thereby improving the display effect of the display panel.

[0053] According to an embodiment of the present application, the light absorbing unit 21 has a side wall 211 facing the light emitting unit 31, and the side wall 211 is provided with a light reflecting layer 40 facing the light emitting unit 31. The light reflecting layer 40 is provided with the side wall 211, and since the side wall 211 faces the light emitting unit 31, and further, the light reflecting layer 40 is provided on both sides of a light emitting unit 31, the light in the light emitting area formed between the light emitting unit 31 and the driving unit 11 can be reflected by the light reflecting layer 40, so that the light can be concentrated in a light emitting area, thereby reducing the light loss of the LED light emitting layer 30 and improving the brightness of the light emitting area.

[0054] Preferably, there is a certain angle between the side wall 211 and the plane where the back panel layer 10 is located, so that the reflected light can return to the current light-emitting area.

[0055] Preferably, the reflective layer 40 is wrapped around the surface of the light absorbing unit 21 away from the back panel layer 10 , so as to reflect light through the reflective layer 40 and reduce light loss inside the display panel.

[0056] According to an embodiment of the present application, in a cross section perpendicular to the backplane layer 10, the cross section of the light absorbing unit 21 is trapezoidal, and two parallel sides of the trapezoidal cross section of the light absorbing unit 21 face the LED light emitting layer 30 and the backplane layer 10 respectively, and the side wall 211 is arranged on the two waists of the trapezoidal cross section of the light absorbing unit 21. The first light absorbing layer can be set as a light absorbing material in the prior art, refer to Figure 5 As shown, the upper bottom of the light absorbing unit 21 faces the first light shielding unit 32, and the lower bottom of the light absorbing unit 21 faces the back plate layer 10. The upper bottom and the lower bottom are parallel to each other. Then, when the upper bottoms of the plurality of light absorbing units 21 are arranged in an array on the back plate layer 10, a new flat layer (equivalent to Fig. 9 BM1 layer shown).

[0057] As an example, refer to Figure 2 and Fig. 9 As shown, the backplane layer 10 includes a circuit driving layer, a PLN layer, a first PVX layer and an electrode layer stacked in sequence, and the first light absorbing layer 10 is arranged on the side of the electrode layer 13 facing the LED light emitting layer. Fig. 9 In the figure, the BM1 (first light absorbing layer 20) shown has Fig.10 The effect of the PLN2 layer (second flat layer) shown in FIG. 1 is that, based on reducing the reflectivity of the non-luminous area by the first light absorbing layer 20, it is not necessary to flatten the backplane layer 10, and the first light absorbing layer 20 (equivalent to Fig. 9 The BM1 layer shown in the figure replaces the flat layer on the surface of the traditional backplane layer 10 (equivalent to Fig.10 PLN2 layer as shown), reducing process costs.

[0058] As an example, refer to Figure 4 and Figure 6 As shown, according to one embodiment of the present application, in the orthographic projection direction of the backplane layer 10, the side of each light absorbing unit 21 facing the LED light emitting layer 30 is flush with the height between the substrates of the backplane layer 10. By making the surfaces of the side of the multiple light absorbing units 21 facing the LED light emitting layer 30 in the same plane, the flatness of the surface of the backplane layer 10 is further improved, and the process cost is reduced.

[0059] In addition, there is a first angle α between the side wall 211 and the normal line perpendicular to the surface of the back panel layer 10, and α is adjusted to be less than 10°, so that the large-angle light emitted by the LED light-emitting layer 30 can pass through the reflective layer 40 on the side wall 211 within the current light-emitting area, thereby reducing the light loss of the LED light-emitting layer 30 and, at the same time, reducing the crosstalk light between two adjacent light-emitting units 31.

[0060] Preferably, the first angle α is ≤6°, thereby preventing crosstalk light while increasing the surface area of ​​the first light absorbing layer facing the LED light emitting layer 30 and improving the flatness between the backplane layer 10 and the LED light emitting layer 30 .

[0061] According to an embodiment of the present application, a second light absorbing layer 60 is further included. The second light absorbing layer 60 (equivalent to Fig. 9 The BM2 layer in the middle is arranged on the side of the light absorbing unit 21 facing the first light shielding unit 32. As an example, the reflective layer 40 can be coated on the side of the light absorbing layer facing the LED light emitting layer 30 in the form of coating, so that the side of the light absorbing unit 21 away from the backplane layer 10 has the reflective layer 40, which improves the reflection of ambient light, improves the utilization rate of light in the light emitting area, and reduces light loss. Preferably, a second light absorbing layer 60 is arranged on the side of the first light absorbing layer 20 facing the first light shielding unit 32, or on the side of the reflective layer 40 facing the first light shielding unit 32, so as to improve the absorption of ambient light through the second light absorbing layer 60, and reduce the influence of ambient light on the light crosstalk of the internal light emitting area.

[0062] As an example, the light reflecting layer 40 is a metal layer, the first light absorbing layer 20 is a black matrix layer, and the plurality of light absorbing units 21 constitute the black matrix layer.

[0063] Preferably, the reflective layer 40 is a silver layer, and the thickness of the silver layer can be set to be between 100nm and 200nm.

[0064] According to one embodiment of the present application, the backplane layer 10 includes an electrode layer 13, and the electrode layer 13 is arranged facing the LED light-emitting layer 30. In the direction perpendicular to the backplane layer 10, a first spacing distance H1 is provided between a side of the first light absorbing layer 20 close to the LED light-emitting layer 30 and the substrate of the backplane layer 10, and a second spacing distance H2 is provided between a side of the electrode layer 13 close to the LED light-emitting layer 30 and the substrate of the backplane layer 10, wherein H1>H2.

[0065] refer to Figure 1-Figure 7 As shown, cathode metal is formed in the electrode layer 13 and connected to the LED light-emitting layer 30, the first spacing distance H1 is set between 2um-10um, and the second spacing distance H2 is set between 200nm-0.5um, so that the light emitted from the light-emitting area formed by the driving unit 11 and the light-emitting unit 31 can be absorbed by the first light-absorbing layer 20. The larger the value of the first spacing distance H1, the lower the reflectivity of the non-light-emitting area.

[0066] refer to Figure 6 and Figure 7As shown, according to an embodiment of the present application, in the direction perpendicular to the backplane layer 10, the thickness of the light emitting unit 31 is D1, and the thickness of the first light absorbing layer 20 is D2, where D1≥D2. Then, by controlling the thickness of the first light absorbing layer 20 and the thickness of the light emitting unit 31, the crosstalk between adjacent light emitting units 31 can be reduced through the light absorbing unit 21, thereby improving the control accuracy of the light emitting unit 31 against crosstalk.

[0067] refer to Figure 6-Figure 7 As shown, according to one embodiment of the present application, a QD color conversion layer 50 is included, and the LED light-emitting layer 30 is disposed between the QD color conversion layer 50 and the first light absorption layer 20;

[0068] The first light absorbing layer 20 includes a spacing region 22, and the spacing region 22 is arranged between adjacent light absorbing units 21;

[0069] The QD color conversion layer 50 includes a plurality of color conversion units 51 and a second shading unit 52 located between adjacent color conversion units 51. The color conversion unit 51 overlaps with the orthographic projection formed by the spacing area 22 on the surface of the backplane layer 10, and the second shading unit 52 overlaps with the orthographic projection formed by the light absorbing unit 21 on the surface of the backplane layer 10.

[0070] As an example, the QD color conversion layer 50 is a QD color conversion layer, the LED light-emitting layer 30 is an LED layer, the light absorbing unit 21, the second light shading unit 52 and the first light shading unit 32 form a non-luminous area, and the spacing area 22, the color conversion unit 51 and the light-emitting unit 31 form a luminous area. The light absorbing unit 21 reduces the light reflection in the non-luminous area to prevent the light emitted by a color conversion unit 51 of the QD color conversion layer from irradiating the wiring unit 12 of the backplane layer 10, and then the metal wiring in the wiring unit 12 reflects the light to another color conversion unit 51, thereby further reducing the crosstalk light in the display panel and improving the display effect.

[0071] As an example, the current specifications of Mini Display for indoor high-end displays are Pitch 0.9-1.2mm, which is mainly used for large conferences or commercial displays. Pitch 0.5-0.9mm technology is under development and can correspond to 100-150-inch 4K displays. The size of the mainstream TV market or 8K display requires technology with Pitch < 0.5mm, which is currently difficult to correspond to due to the limitations of the bonding process. QD on chip technology can break through this limitation and occupy application scenarios such as the high-end TV market and high-end commercial conferences.

[0072] However, in the existing QD-LED color conversion display panel, reference Figure 8As shown in the figure, the light emitted by the LED will illuminate the Bank and the metal wire in the middle (equivalent to the wiring unit 12), causing crosstalk and light leakage. The existing solution is to stick a black film (transmittance 25%) on the entire surface of the backplane layer 10, but this will reduce the luminous brightness of the device, especially the luminous brightness of the luminous area. In order to solve this problem, the PLN2 (reference Fig.10 ) to BM (reference Fig. 9 , which is equivalent to the first light absorbing layer 20), absorbs the light reflected by the Bank, reduces crosstalk, and does not need to apply a black film, thereby increasing the luminous brightness of the device and improving the structure of the back plate layer 10. Figure 1 and Figure 2 As shown, the light reflected by the Bank is absorbed by the first light absorbing layer 20. On the other hand, the first light absorbing layer 20 serves as a flat layer in the original backplane layer 10, thereby simplifying the process.

[0073] This can not only solve the crosstalk caused by the light emitted by QD passing through the metal reflection of the backplane layer 10 circuit, but also reduce the reflectivity of the entire panel (the reflection caused by the ambient light hitting the metal wire of the backplane). It also has a certain degree of weakening effect on the large-angle light emitted by the LED. The BM can be made of black Bank material, and the thickness D2 of the first light-absorbing layer 20 can be about 10um. Therefore, the BM can be made thicker, and there is no BM at the position where the LED is bonded. The top view of the relationship between the LED and the backplane is shown in the figure. Figure 3 As shown, the cross-sectional diagram of the relationship between the LED and the backplane is as follows Figure 4 As shown, replacing with BM has no impact on subsequent processes (BM is the top layer), BM top view ( Figure 1 ) The light absorbing unit 21 is used to block the non-displayed portion (equivalent to the non-luminous area formed with the first light shielding unit 32) as much as possible, which can prevent crosstalk between pixels on the one hand, and crosstalk from ambient light on the other hand.

[0074] In the cross section perpendicular to the backplane layer 10, the cross section of the light absorbing unit 21 is trapezoidal, and the two parallel sides of the trapezoidal cross section of the light absorbing unit 21 face the LED light emitting layer 30 and the backplane layer 10 respectively, and the side wall 211 is arranged on the two waists of the trapezoidal cross section of the light absorbing unit 21. The light absorbing layer can be set as a light absorbing material in the prior art, refer to Figure 5As shown, the upper bottom of the light absorbing unit 21 faces the first light shading unit 32, and the lower bottom of the light absorbing unit 21 faces the backplane layer 10, and the upper bottom and the lower bottom are parallel to each other. Furthermore, when the upper bottoms of multiple light absorbing units 21 are arranged in an array on the backplane layer 10, a flat layer is formed. Furthermore, on the basis of reducing the reflectivity of the non-luminous area by the light absorbing layer, there is no need to flatten the backplane layer 10, and the light absorbing layer can also replace the flat layer on the surface of the traditional backplane layer 10 to reduce the process cost.

[0075] As an example, a BM with a height of 4.5 um can be made, and then a layer of Ag metal with high reflectivity can be made as a reflective layer 40, and then another layer of BM (equivalent to the second light absorbing layer 60) can be made on the high reflective metal. In this way, light with a large angle is irradiated on the reflective layer 40 of the side wall 211, and can be reflected back to the current pixel, so that the use of large-angle light can be realized. Through the second light absorbing layer 60, crosstalk of ambient light can also be prevented. Figure 5 shown.

[0076] refer to Figure 2 and Figure 6-7 As shown, in the LED+QDCF part: QD is a color conversion material that provides red light and green light, and the color film filters out excess blue light; LED provides a blue light source.

[0077] Back panel: provides driving circuit, AM driving mode drives LED to emit light, and provides power for LED;

[0078] The electrode layer 13 includes SD1, VDD, Vss and data lines, wherein SD1 is connected to the data line, and VDD and Vss are connected to two layers of metal, which is convenient for later electroplating of thick copper on the VDD and Vss layers, and is convenient for subsequent electroplating processes, and can effectively reduce the resistance in the electrode layer 13.

[0079] According to another aspect of the present application, a display device is provided, comprising the display panel.

[0080] It should be noted that, in this article, relational terms such as "first" and "second" are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the existence of other identical elements in the process, method, article or device including the elements.

[0081] The foregoing is merely a specific embodiment of the present invention, which enables those skilled in the art to understand or implement the present invention. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but rather to the widest scope consistent with the principles and novel features claimed herein.

Claims

1. A display panel, characterized in that: It comprises a back plate layer (10), a first light absorption layer (20), an LED light emitting layer (30) and a QD color conversion layer (50) which are stacked in sequence; The side of the backplane layer (10) facing the LED light-emitting layer (30) comprises a plurality of driving units (11) and a wiring unit (12) located between two adjacent driving units (11); The LED light-emitting layer (30) comprises a plurality of light-emitting units (31) and a first shading unit (32) located between two adjacent light-emitting units (31); the light-emitting units (31) overlap with the orthographic projections formed by the driving unit (11) on the surface of the backplane layer (10); and the first shading unit (32) overlaps with the orthographic projections formed by the wiring unit (12) on the backplane layer (10); The first light absorbing layer (20) comprises a plurality of light absorbing units (21) arranged in an array, and the light absorbing units (21) are arranged between the wiring unit (12) and the first light shielding unit (32); The QD color conversion layer (50) comprises a plurality of color conversion units (51) and a second light shielding unit (52) located between adjacent color conversion units (51); the spacing region (22) between adjacent light absorbing units (21) overlaps with the orthographic projection formed by the color conversion unit (51) on the surface of the backplane layer (10); and the second light shielding unit (52) overlaps with the orthographic projection formed by the light absorbing unit (21) on the surface of the backplane layer (10).

2. The display panel according to claim 1, wherein: The light absorbing unit (21) has a side wall (211) on a side facing the light emitting unit (31), and the side wall (211) is provided with a light reflecting layer (40) facing the light emitting unit (31).

3. The display panel according to claim 2, wherein: In a cross section perpendicular to the backplane layer (10), the cross section of the light absorbing unit (21) is trapezoidal, two parallel sides of the trapezoidal cross section of the light absorbing unit (21) face the LED light-emitting layer (30) and the backplane layer (10) respectively, and the side wall (211) is arranged on two waists of the trapezoidal cross section of the light absorbing unit (21).

4. The display panel according to claim 2, wherein: There is a first angle α between the side wall (211) and a normal line perpendicular to the surface of the back plate layer (10), wherein α is less than 10°.

5. The display panel according to claim 1, wherein: It also comprises a second light absorbing layer (60), wherein the second light absorbing layer (60) is arranged on a side of the light absorbing unit (21) facing the first light shielding unit (32).

6. The display panel according to claim 2, wherein: The light reflecting layer (40) is a metal layer, and the first light absorbing layer (20) is a black matrix layer.

7. The display panel according to claim 6, wherein: The reflective layer (40) is a silver layer.

8. The display panel according to claim 1, wherein: The backplane layer (10) comprises an electrode layer (13), the electrode layer (13) is arranged facing the LED light-emitting layer (30), and in a direction perpendicular to the backplane layer (10), a first spacing distance H1 exists between a side of the first light-absorbing layer (20) close to the LED light-emitting layer (30) and a substrate of the backplane layer (10), and a second spacing distance H2 exists between a side of the electrode layer (13) close to the LED light-emitting layer (30) and the substrate of the backplane layer (10), wherein H1>H2.

9. The display panel according to claim 1, wherein: The backplane layer (10) comprises a circuit driving layer, a PLN layer, a first PVX layer and an electrode layer (13) which are stacked in sequence, and the first light absorbing layer (20) is arranged on a side of the electrode layer (13) facing the LED light emitting layer (30).

10. The display panel according to claim 1, wherein: In a direction perpendicular to the backplane layer (10), The thickness of the LED light-emitting layer (30) is D1, and the thickness of the first light-absorbing layer (20) is D2, wherein D1≥D2.

11. The display panel according to any one of claims 1 to 10, characterized in that: In the orthographic projection direction of the backplane layer (10), the side of each light absorbing unit (21) facing the LED light-emitting layer (30) is flush with the height between the substrate of the backplane layer (10).

12. A display device, characterized in that: A display panel comprising any one of claims 1 to 11.

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