Pixel unit, display panel and display device

Abstract

The embodiment of the utility model relates to the field of display, in particular to a pixel unit, a display panel and a display device.The pixel unit comprises a substrate, a first sub-pixel unit and a second sub-pixel unit, and the first sub-pixel unit and the second sub-pixel unit are both arranged on the substrate; a first optical adjustment layer is arranged between the first sub-pixel unit and the substrate; the second sub-pixel unit comprises a second optical adjustment layer. According to the technical scheme, the visual angle characteristics of the first sub-pixel units and the second sub-pixel units can be improved.

Description

Technical Field

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

[0002] Currently, a display panel includes a plurality of pixel units, and pixel units of different colors may have viewing angle characteristic problems such as brightness reduction and color shift at different viewing angles. Utility Model Content

[0003] Based on this, embodiments of the present application provide a pixel unit, a display panel and a display device.

[0004] In order to solve the above technical problems, the embodiment of the present application provides a pixel unit, which adopts the following technical solution:

[0005] A pixel unit comprises a substrate, and a first sub-pixel unit and a second sub-pixel unit arranged on the substrate;

[0006] A first optical adjustment layer is provided between the first sub-pixel unit and the substrate;

[0007] The second sub-pixel unit includes a second optical adjustment layer.

[0008] Further, the first sub-pixel unit includes a red sub-pixel unit and / or a green sub-pixel unit; and / or,

[0009] The second sub-pixel unit is a blue light pixel unit.

[0010] Further, the first sub-pixel unit includes a red sub-pixel unit and a green sub-pixel unit, and the first optical adjustment layer includes a first adjustment unit disposed between the red sub-pixel unit and the substrate and a second adjustment unit disposed between the green sub-pixel unit and the substrate;

[0011] The thickness of the first adjusting unit is smaller than the thickness of the second adjusting unit.

[0012] Furthermore, a thickness ratio of the first adjustment unit to the second adjustment unit is (100-200):(120-250).

[0013] Furthermore, the red sub-pixel unit, the green sub-pixel unit and the blue sub-pixel unit respectively and independently include a first electrode, a hole injection layer, a light-emitting layer and a second electrode which are stacked in sequence;

[0014] The first electrodes in the red sub-pixel unit and the green sub-pixel unit are both arranged on the first optical adjustment layer;

[0015] The first electrode of the blue light sub-pixel unit is disposed on the substrate, and the second optical adjustment layer is the hole injection layer of the blue light sub-pixel unit.

[0016] Further, the thickness of the hole injection layer in the red sub-pixel unit is greater than the thickness of the hole injection layer in the green sub-pixel unit, and less than the thickness of the second optical adjustment layer; and / or,

[0017] The thickness ratio of the red sub-pixel unit, the green sub-pixel unit and the second optical adjustment layer is (20-60): (10-40): (80-150).

[0018] Furthermore, a surface of the light-emitting layer away from the substrate is a light-emitting surface;

[0019] The light emitting surfaces of the red light sub-pixel unit, the green light sub-pixel unit and the blue light sub-pixel unit are flush.

[0020] Further, the red sub-pixel unit, the green sub-pixel unit and the blue sub-pixel unit each independently include a hole transport layer disposed between the hole injection layer and the light emitting layer; and / or,

[0021] The red sub-pixel unit, the green sub-pixel unit and the blue sub-pixel unit further independently include an electronic functional layer arranged between the second electrode and the light-emitting layer.

[0022] In order to solve the above technical problems, the embodiment of the present application further provides a display panel, which adopts the following technical solution:

[0023] A display panel comprises the pixel unit described above.

[0024] Furthermore, the first sub-pixel unit and the second sub-pixel unit independently include a first electrode, a hole injection layer, a hole transport layer, a light-emitting layer, an electronic functional layer and a second electrode which are stacked;

[0025] The first optical adjustment layer is disposed between the substrate and the first electrode of the first sub-pixel unit;

[0026] The second optical adjustment layer is a hole injection layer of the second sub-pixel unit, and the first electrode of the second sub-pixel unit is disposed on the substrate.

[0027] In order to solve the above technical problems, the embodiment of the present application further provides a display device, which adopts the following technical solution:

[0028] A display device comprises the display panel as described above.

[0029] Compared with the prior art, the embodiments of the present application mainly have the following beneficial effects: the present application uses the first optical adjustment layer to adjust the light emitting position of the first sub-pixel unit, and uses the second optical adjustment layer to adjust the light emitting position of the second sub-pixel unit, thereby improving the viewing angle characteristics of the first sub-pixel unit and the second sub-pixel unit. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] In order to more clearly illustrate the scheme in the present application, a brief introduction is given below to the drawings required for use in the description of the embodiments. Obviously, the drawings described below are some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0031] Figure 1 It is a structural schematic diagram of a pixel unit in an embodiment of the present application.

[0032] Reference numerals:

[0033] 100, substrate; 200, first sub-pixel unit; 200a, red sub-pixel unit; 200b, green sub-pixel unit; 210, first optical adjustment layer; 211, first adjustment unit; 212, second adjustment unit; 300, second sub-pixel unit; 400, first electrode; 500, hole injection layer; 600, light emitting layer; 610, light emitting surface; 700, second electrode; 800, hole transport layer; 900, electronic functional layer; 910, electron transport layer; 920, electron injection layer. DETAILED DESCRIPTION

[0034] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by technicians in the technical field of this application; the terms used in the specification of the application herein are only for the purpose of describing specific embodiments and are not intended to limit this application; the terms "including" and "having" and any variations thereof in the specification and claims of this application and the above-mentioned drawings are intended to cover non-exclusive inclusions. The terms "first", "second", etc. in the specification and claims of this application or the above-mentioned drawings are used to distinguish different objects, not to describe a specific order.

[0035] Reference to "embodiments" herein means that a particular feature, structure, or characteristic described in conjunction with the embodiments may be included in at least one embodiment of the present application. The appearance of the phrase in various locations in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0036] For ease of understanding, the terms mentioned in the specific implementation are first explained below:

[0037] (1) Light emitting position of sub-pixel unit: the light emitting position of the first sub-pixel unit and the light emitting position of the second sub-pixel unit are the positions for emitting light respectively.

[0038] (2) Thickness of sub-pixel unit: the thickness of the first sub-pixel unit and the thickness of the second sub-pixel unit are respectively the vertical distance between the first electrode and the second electrode.

[0039] See also Figure 1 An embodiment of the present application provides a pixel unit, including a substrate 100, and a first sub-pixel unit 200 and a second sub-pixel unit 300 both arranged on the substrate 100; a first optical adjustment layer 210 is arranged between the first sub-pixel unit 200 and the substrate 100; the second sub-pixel unit 300 includes a second optical adjustment layer.

[0040] Understandably, in the present application, the first optical adjustment layer 210 is used to adjust the light emitting position of the first sub-pixel unit 200, and the second optical adjustment layer is used to adjust the light emitting position of the second sub-pixel unit 300, so as to adjust the light emitting positions of the first sub-pixel unit 200 and the second pixel unit 300 respectively, improve the viewing angle characteristics of the first sub-pixel unit 200 and the second sub-pixel unit 300, and thus improve the brightness and color consistency at different viewing angles.

[0041] In some embodiments, continue to refer to Figure 1 , the first sub-pixel unit 200 includes a red sub-pixel unit 200a and / or a green sub-pixel unit 200b.

[0042] In some embodiments, continue to refer to Figure 1 , the second sub-pixel unit 300 includes a blue light sub-pixel unit.

[0043] In some embodiments, continue to refer to Figure 1 The first sub-pixel unit 200 includes a red sub-pixel unit 200a and a green sub-pixel unit 200b, and the first optical adjustment layer 210 includes a first adjustment unit 211 arranged between the red sub-pixel unit 200a and the substrate 100 and a second adjustment unit 212 arranged between the green sub-pixel unit 200b and the substrate 100; the thickness of the first adjustment unit 211 is less than the thickness of the second adjustment unit 212.

[0044] In this embodiment, since the wavelength of red light (620-750nm) is greater than the wavelength of green light (495-570nm), the light emitting positions of the red sub-pixel unit 200a and the green sub-pixel unit 200b are different; therefore, in this application, the thickness of the first adjustment unit 211 is made smaller than the thickness of the second adjustment unit 212 so that the light emitting positions of the red sub-pixel unit 200a and the green sub-pixel unit 200b are close or the same after adjustment, thereby making the viewing angle characteristics of the first sub-pixel unit 200 and the second sub-pixel unit 300 similar or the same.

[0045] In some embodiments, continue to refer to Figure 1 , the thickness ratio of the first adjusting unit 211 to the second adjusting unit 212 is (100-200):(120-250).

[0046] Optionally, the thickness ratio of the first adjustment unit 211 to the thickness of the second adjustment unit 212 is selected from the range formed by any one or any two of 100:120, 100:150, 100:200, 100:250, 150:120, 150:150, 150:200, 150:250, 200:120, 200:150, 200:200, 200:250.

[0047] Furthermore, the thickness of the first adjustment unit 211 is 100-200 nm.

[0048] Optionally, the thickness of the first adjustment unit 211 is selected from a range formed by any one or two of 100 nm, 110 nm, 120 nm, 130 nm, 140 nm, 150 nm, 160 nm, 170 nm, 180 nm, 190 nm, and 200 nm.

[0049] Furthermore, the thickness of the second adjustment unit 212 is 120-250 nm.

[0050] Optionally, the thickness of the second adjustment unit 212 is selected from the range formed by any one or two of 120nm, 130nm, 140nm, 150nm, 160nm, 170nm, 180nm, 190nm, 200nm, 210nm, 220nm, 230nm, 240nm, and 250nm.

[0051] In some embodiments, continue to refer to Figure 1The red sub-pixel unit 200a, the green sub-pixel unit 200b and the blue sub-pixel unit respectively and independently include a first electrode 400, a hole injection layer 500, a light-emitting layer 600 and a second electrode 700 which are stacked in sequence; the first electrode 400 in the red sub-pixel unit 200a and the green sub-pixel unit 200b are both arranged on the first optical adjustment layer 210; the first electrode 400 of the blue sub-pixel unit is arranged on the substrate 100, and the second optical adjustment layer is the hole injection layer 500 of the blue sub-pixel unit.

[0052] Understandably, since the wavelength of red light (620-750nm) and the wavelength of green light (495-570nm) are both greater than the wavelength of blue light (450-495nm), the microcavity length of the blue light sub-pixel unit is shorter, resulting in an increase in the internal current of the blue light sub-pixel unit, and there is a risk of leakage. Therefore, in the present application, the blue light sub-pixel unit uses the hole injection layer 500 as the second optical adjustment layer to adjust its light output position to increase the microcavity length in the blue light sub-pixel unit and reduce the risk of leakage. The hole injection layer 500 has a high mobility, which can reduce the influence of the thickness change of the hole injection layer 500 on the electrical characteristics of the blue light sub-pixel unit, and the red light sub-pixel unit 200a and the green light sub-pixel unit 200b use the first optical adjustment layer 210 to adjust their light output positions, thereby adjusting the light output positions of the red light sub-pixel unit 200a, the green light sub-pixel unit 200b, and the blue light sub-pixel unit to improve the viewing angle characteristics.

[0053] In some embodiments, continue to refer to Figure 1 , the thickness of the hole injection layer 500 in the red sub-pixel unit 200a is greater than the thickness of the hole injection layer 500 in the green sub-pixel unit 200b, and less than the thickness of the hole injection layer 500 in the blue sub-pixel unit.

[0054] It can be understood that, due to the high mobility of the hole injection layer 500, by making the thickness of the hole injection layer 500 in the blue sub-pixel unit greater than the thickness of the hole injection layer 500 in the red sub-pixel unit 200a and greater than the thickness of the hole injection layer 500 in the green sub-pixel unit 200b, not only the length of the microcavity in the blue sub-pixel unit is increased and the risk of leakage is reduced, but also, compared with the hole injection layer 500 in the blue sub-pixel unit, the hole injection layer 500 in the red sub-pixel unit 200a and the hole injection layer 500 in the green sub-pixel unit 200b can reserve space for the setting of the first optical adjustment layer 210, so that the light emitting positions of the red sub-pixel unit 200a, the green sub-pixel unit 200b and the blue sub-pixel unit in the pixel unit are close or the same, thereby improving the viewing angle characteristics.

[0055] In some embodiments, continue to refer to Figure 1 , the thickness ratio of the hole injection layer 500 in the red sub-pixel unit 200a, the green sub-pixel unit 200b and the blue sub-pixel unit is (20-60): (10-40): (80-150). Within this range, the influence of the thickness change of the hole injection layer 500 on the electrical properties of the red sub-pixel unit 200a, the green sub-pixel unit 200b and the blue sub-pixel unit can be reduced, and at the same time, space can be reserved for setting the first optical adjustment layer 210 in the red sub-pixel unit 200a and the green sub-pixel unit 200b, so that the light emitting positions of the red sub-pixel unit 200a, the green sub-pixel unit 200b and the blue sub-pixel unit in the pixel unit are close or the same, thereby improving the viewing angle characteristics.

[0056] Furthermore, the hole injection layer 500 of the red sub-pixel unit 200a has a thickness of 20-60 nm.

[0057] Optionally, the thickness of the hole injection layer 500 of the red sub-pixel unit 200a is selected from the range formed by any one or two of 20 nm, 30 nm, 40 nm, 50 nm, and 60 nm.

[0058] Furthermore, the thickness of the hole injection layer 500 of the green sub-pixel unit 200 b is 10-40 nm.

[0059] Optionally, the thickness of the hole injection layer 500 of the green photon image unit 200 b is selected from the range formed by any one or two of 10 nm, 20 nm, 30 nm, and 40 nm.

[0060] Furthermore, the hole injection layer 500 of the blue light sub-pixel unit has a thickness of 80-150 nm.

[0061] Optionally, the thickness of the hole injection layer 500 of the blue sub-pixel unit is selected from the range formed by any one or two of 80 nm, 90 nm, 100 nm, 110 nm, 120 nm, 130 nm, 140 nm, and 150 nm.

[0062] In some embodiments, continue to refer to Figure 1, the side of the light emitting layer 600 away from the substrate 100 is a light emitting surface 610, and the light emitting surface 610 is used for the light emitting layer 600 to emit light; the light emitting surfaces 610 in the red sub-pixel unit 200a, the green sub-pixel unit 200b and the blue sub-pixel unit are aligned. In this way, the light emitting surfaces 610 in the red sub-pixel unit 200a, the green sub-pixel unit 200b and the blue sub-pixel unit are at the same light emitting height, so that the red sub-pixel unit 200a, the green sub-pixel unit 200b and the blue sub-pixel unit have similar or identical viewing angle characteristics, thereby improving the consistency of brightness and color under different viewing angles.

[0063] In some embodiments, continue to refer to Figure 1 The red sub-pixel unit 200a, the green sub-pixel unit 200b, and the blue pixel unit further independently include a hole transport layer 800 disposed between the hole injection layer 500 and the light emitting layer 600. The hole transport layer 800 is used to improve the hole transport performance, thereby improving the performance of the pixel unit.

[0064] In some embodiments, continue to refer to Figure 1 The first sub-pixel unit 200 and the second sub-pixel unit 300 further independently include an electronic functional layer 900 disposed between the second electrode 700 and the light-emitting layer 600 .

[0065] In this embodiment, the electronic functional layer 900 includes an electron transport layer 910 and / or an electron injection layer 920; when the electronic functional layer includes the electron transport layer 910 and the electron injection layer 920, the electron transport layer 900 is disposed on a side close to the light emitting layer 600, and the electron injection layer 920 is disposed on a side close to the second electrode 700. The electron transport layer 910 is used to improve the electron transport performance, and the electron injection layer 920 is used to improve the electron injection performance, thereby improving the performance of the pixel unit.

[0066] An embodiment of the present application further provides a display device, comprising the pixel unit as described above.

[0067] In this embodiment, in the pixel unit, the first optical adjustment layer 210 is used to adjust the light emitting position of the first sub-pixel unit 200, and the second optical adjustment layer is used to adjust the light emitting position of the second sub-pixel unit 300, so as to improve the viewing angle characteristics of the first sub-pixel unit 200 and the second sub-pixel unit 300 and enhance the consistency of brightness and color under different viewing angles.

[0068] For example, see Figure 1In the display device, the first sub-pixel unit 200 and the second sub-pixel unit 300 respectively independently include a first electrode 400, a hole injection layer 500, a hole transport layer 800, a light-emitting layer 600, an electronic functional layer 900 and a second electrode 700 which are stacked;

[0069] The first optical adjustment layer 210 is disposed between the substrate 100 and the first electrode 400 of the first sub-pixel unit 200;

[0070] The second optical adjustment layer is a hole injection layer 500 of the second sub-pixel unit 300 , and the first electrode 400 of the second sub-pixel unit 300 is disposed on the substrate 100 .

[0071] An embodiment of the present application further provides a display device, comprising the display panel as described above.

[0072] In this embodiment, in the pixel unit of the display panel, the first optical adjustment layer 210 is used to adjust the light emitting position of the first sub-pixel unit 200, and the second optical adjustment layer is used to adjust the light emitting position of the second sub-pixel unit 300, so as to improve the viewing angle characteristics of the first sub-pixel unit 200 and the second sub-pixel unit 300, improve the consistency of brightness and color under different viewing angles, and thereby improve the display effect of the display device.

[0073] It is understandable that the display device includes: a mobile phone, a television, a tablet computer, a monitor, a VR / AR device, a computer, a car display or any product or component with a display function, which is not specifically limited here.

[0074] In order to make the technical personnel in this field better understand the present application scheme, the following will be combined with Figure 1 , the materials that can be selected for the first optical adjustment layer 210, the first electrode 400, the hole injection layer 500, the hole transport layer 800, the light-emitting layer 600, the electron transport layer 910, the electron injection layer 920, and the second electrode 700 in the embodiment of the present application are clearly and completely described.

[0075] (1) The first optical adjustment layer 210 includes organic material and / or inorganic material; optionally, the organic material is a photoresist material, and the photoresist material is selected from at least one of polyimide, polyethylene naphthalate, polyethylene terephthalate, polycarbonate, polyetherimide, polyethersulfone, and benzocyclobutene; the inorganic material is selected from at least one of silicon nitride, silicon oxide, and silicon oxynitride.

[0076] (2) The light-emitting layer 600 is a quantum dot light-emitting layer or an organic light-emitting layer; the material of the quantum dot light-emitting layer includes at least one of a single structure quantum dot and a core-shell structure quantum dot, and the material of the single structure quantum dot, the core material of the core-shell structure quantum dot and the shell material of the core-shell structure quantum dot are independently selected from at least one of a II-VI group compound, a IV-VI group compound, a III-V group compound and a I-III-VI group compound, wherein the II-VI group compound is selected from CdS, CdSe, CdTe, ZnS, ZnSe, ZnTe, ZnO, HgS, HgSe, Hg At least one of Te, CdSeS, CdSeTe, CdSTe, ZnSeS, ZnSeTe, ZnSTe, HgSeS, HgSeTe, HgSTe, CdZnS, CdZnSe, CdZnTe, CdHgS, CdHgSe, CdHgTe, HgZnS, HgZnSe, HgZnTe, CdZnSeS, CdZnSeTe, CdZnSTe, CdHgSeS, CdHgSeTe, CdHgSTe, HgZnSeS, HgZnSeTe and HgZnSTe, wherein the IV-VI group compound is selected from SnS , SnSe, SnTe, PbS, PbSe, PbTe, SnSeS, SnSeTe, SnSTe, PbSeS, PbSeTe, PbSTe, SnPbS, SnPbSe, SnPbTe, SnPbSSe, SnPbSeTe and SnPbSTe, and the III-V group compound is selected from GaN, GaP, GaAs, GaSb, AlN, AlP, AlAs, AlSb, InN, InP, InAs, InSb, GaNP, GaNAs, GaNSb, GaPAs, GaPSb, AlNP, Al At least one of NAs, AlNSb, AlPAs, AlPSb, InNP, InNAs, InNSb, InPAs, InPSb, GaAlNP, GaAlNAs, GaAlNSb, GaAlPAs, GaAlPSb, GaInNP, GaInNAs, GaInNSb, GaInPAs, GaInPSb, InAlNP, InAlNAs, InAlNSb, InAlPAs or InAlPSb, and the I-III-VI group compound is selected from at least one of CuInS2, CuInSe2 and AgInS2;The material of the organic light-emitting layer includes at least one of 4,4'-bis(N-carbazole)-1,1'-biphenyl:tri[2-(p-tolyl)pyridine-C2,N)iridium(III), 4,4',4"-tri(carbazole-9-yl)triphenylamine:tri[2-(p-tolyl)pyridine-C2,N)iridium, diaromatic anthracene derivatives, distilbene aromatic derivatives, pyrene derivatives, fluorene derivatives, TBPe fluorescent materials, TTPX fluorescent materials, TBRb fluorescent materials and DBP fluorescent materials, polyacetylene and its derivatives, polyparaphenylene and its derivatives, polythiophene and its derivatives, polyfluorene and its derivatives.

[0077] (3) The materials of the hole injection layer 500 and the hole transport layer 800 independently include at least one of TFB, CuPc, PVK, Poly-TPD, PFB, DNTPD, TCATA, TCCA, CBP, TPD, NPB, NPD, PEDOT:PSS, TAPC, MCC, F4-TCNQ, HATCN, 4,4',4'-tris(N-3-methylphenyl-Nphenylamino)triphenylamine, polyaniline, transition metal oxides, transition metal sulfides, transition metal tinides, doped graphene, undoped graphene, C60, polyester copper carbonate, and molybdenum trioxide.

[0078] (4) The materials of the electron transport layer 910 and the electron injection layer 920 independently include inorganic materials and / or organic materials; the inorganic materials include one or more of doped or undoped zinc oxide, barium oxide, aluminum oxide, titanium oxide, tin oxide, tantalum oxide, zirconium oxide, nickel oxide, lithium titanium oxide, aluminum zinc oxide, manganese zinc oxide, zinc tin oxide, lithium zinc oxide, indium tin oxide, cadmium sulfide, zinc sulfide, molybdenum sulfide, tungsten sulfide, copper sulfide, zinc tin, indium phosphide, gallium phosphide, copper indium sulfide, copper gallium sulfide, and barium titanate, and the doped elements include at least one of aluminum, magnesium, lithium, manganese, yttrium, lanthanum, copper, nickel, zirconium, cerium, and gadolinium; the organic materials include at least one of quinoxaline compounds, imidazole compounds, triazine compounds, fluorene compounds, hydroxyquinoline compounds, polythiophene compounds, perylene imide compounds, and fullerene compounds.

[0079] In order to enable those skilled in the art to better understand the solution of the present application, the method for preparing the pixel unit in the embodiment of the present application will be clearly and completely described below in conjunction with the accompanying drawings.

[0080] As an example, the following is a method for preparing a pixel unit, wherein the pixel unit includes a red sub-pixel unit 200a, a green sub-pixel unit 200b, and a blue sub-pixel unit. The method for preparing the pixel unit includes:

[0081] S1. Provide a TFT array substrate 100, wherein the TFT array substrate 100 has a first pixel opening for preparing a red sub-pixel unit 200a, a second pixel opening for preparing a green sub-pixel unit 200b, and a third pixel opening for preparing a blue sub-pixel unit.

[0082] S2, disposing a first optical adjustment layer 210 on the first pixel opening and the second pixel opening respectively;

[0083] S3, disposing a first electrode 400 at the first pixel opening, the second pixel opening, and the third pixel opening respectively;

[0084] S4, sequentially disposing a hole injection layer 500, a hole transport layer 800, a light emitting layer 600, an electron transport layer 910 and an electron injection layer 920 on the first electrode 400 corresponding to the first pixel opening, the second pixel opening and the third pixel opening respectively; wherein, in the third pixel opening, the hole injection layer disposed is used as the second optical adjustment layer;

[0085] S5. Form a second electrode 700 on the electron injection layer 920 corresponding to the first pixel opening, the second pixel opening, and the third pixel opening respectively, to obtain a red sub-pixel unit 200a formed at the first pixel opening, a green sub-pixel unit 200b formed at the second pixel opening, and a blue sub-pixel unit formed at the third pixel opening, thereby obtaining red, green, and blue pixel units.

[0086] Obviously, the embodiments described above are only some embodiments of the present application, rather than all embodiments. The preferred embodiments of the present application are given in the accompanying drawings, but they do not limit the patent scope of the present application. The present application can be implemented in many different forms. On the contrary, the purpose of providing these embodiments is to make the understanding of the disclosure of the present application more thorough and comprehensive. Although the present application is described in detail with reference to the aforementioned embodiments, for those skilled in the art, it is still possible to modify the technical solutions recorded in the aforementioned specific implementation methods, or to perform equivalent replacement of some of the technical features therein. Any equivalent structure made using the contents of the specification and drawings of this application, directly or indirectly used in other related technical fields, is similarly within the scope of patent protection of this application.

Claims

1. A pixel unit, characterized in that: It includes a substrate, and a first sub-pixel unit and a second sub-pixel unit arranged on the substrate; A first optical adjustment layer is provided between the first sub-pixel unit and the substrate; The second sub-pixel unit includes a second optical adjustment layer.

2. The pixel unit according to claim 1, characterized in that: The first sub-pixel unit includes a red sub-pixel unit and / or a green sub-pixel unit; and / or, The second sub-pixel unit is a blue light sub-pixel unit.

3. The pixel unit according to claim 2, characterized in that: When the first sub-pixel unit includes a red sub-pixel unit and a green sub-pixel unit, the first optical adjustment layer includes a first adjustment unit disposed between the red sub-pixel unit and the substrate and a second adjustment unit disposed between the green sub-pixel unit and the substrate; The thickness of the first adjusting unit is smaller than the thickness of the second adjusting unit.

4. The pixel unit according to claim 3, characterized in that: The thickness ratio of the first adjusting unit to the second adjusting unit is (100-200):(120-250).

5. The pixel unit according to claim 2, characterized in that: The red sub-pixel unit, the green sub-pixel unit and the blue sub-pixel unit respectively independently include a first electrode, a hole injection layer, a light-emitting layer and a second electrode which are stacked in sequence; The first electrodes in the red sub-pixel unit and the green sub-pixel unit are both arranged on the first optical adjustment layer; The first electrode of the blue light sub-pixel unit is disposed on the substrate, and the second optical adjustment layer is the hole injection layer of the blue light sub-pixel unit.

6. The pixel unit according to claim 5, characterized in that: The thickness of the hole injection layer in the red sub-pixel unit is greater than the thickness of the hole injection layer in the green sub-pixel unit and less than the thickness of the hole injection layer in the blue sub-pixel unit; and / or, The thickness ratio of the red sub-pixel unit, the green sub-pixel unit and the second optical adjustment layer is (20-60): (10-40): (80-150).

7. The pixel unit according to claim 5, characterized in that: The side of the light-emitting layer away from the substrate is a light-emitting surface; The light emitting surfaces of the red light sub-pixel unit, the green light sub-pixel unit and the blue light sub-pixel unit are flush.

8. The pixel unit according to claim 5, characterized in that: The red sub-pixel unit, the green sub-pixel unit and the blue sub-pixel unit each independently include a hole transport layer disposed between the hole injection layer and the light emitting layer; and / or, The red sub-pixel unit, the green sub-pixel unit and the blue sub-pixel unit further independently include an electronic functional layer arranged between the second electrode and the light-emitting layer.

9. A display panel, characterized in that: The method comprises the pixel unit according to any one of claims 1 to 8.

10. The display panel according to claim 9, characterized in that: The first sub-pixel unit and the second sub-pixel unit independently include a first electrode, a hole injection layer, a hole transport layer, a light-emitting layer, an electronic functional layer and a second electrode which are stacked; The first optical adjustment layer is disposed between the substrate and the first electrode of the first sub-pixel unit; The second optical adjustment layer is a hole injection layer of the second sub-pixel unit, and the first electrode of the second sub-pixel unit is disposed on the substrate.

11. A display device, characterized in that: Comprising the display panel as claimed in claim 9 or 10.

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