Display panel and display device

Abstract

The embodiments of the present application provide a display panel and a display device. The display panel includes a substrate and one or more light-emitting layers, wherein the light-emitting layers include a first sub-light-emitting layer, a second sub-light-emitting layer, and a third sub-light-emitting layer. The one or more first sub-light-emitting layers emit red light, and the intrinsic spectrum of the red light satisfies the following conditions: a peak of not less than 642 nanometers and not more than 646 nanometers, and a half-width of not less than 30 nanometers and not more than 70 nanometers; the one or more second sub-light-emitting layers emit green light, and the intrinsic spectrum of the green light satisfies the following conditions: a peak of not less than 525 nanometers and not more than 533 nanometers, and a half-width of not less than 20 nanometers and not more than 40 nanometers; and the one or more third sub-light-emitting layers emit blue light, and the intrinsic spectrum of the blue light satisfies the following conditions: a peak of not less than 458 nanometers and not more than 462 nanometers, and a half-width of not less than 16 nanometers and not more than 30 nanometers. The display panel provided by the embodiments of the present application can significantly improve the color gamut, efficiency, viewing angle brightness, and viewing angle color deviation of the display panel.

Description

Technical Field

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

[0002] Organic Light Emitting Diode (OLED) displays offer numerous advantages, including self-luminescence, high brightness, high contrast, fast response, wide viewing angle, simple structure, and flexible display. Their excellent performance has attracted the attention of universities and businesses, leading to rapid development and widespread application in display products.

[0003] In recent years, the BT2020 color gamut has become a hot topic in the film and television market due to its wide color gamut. However, the color gamut coverage of existing conventional display panels is only about 85% of BT2020. The color gamut coverage can only reach about 90% by adjusting the display panel structure. However, this also causes a serious decline in efficiency and viewing angle brightness, and a serious deviation in the visual character trajectory. Summary of the Invention

[0004] In view of the shortcomings of the existing methods, the present application proposes a display panel and a display device to solve the technical problems of the existing technology such as serious decline in efficiency and viewing angle brightness, and serious deviation of the visual color deviation trajectory.

[0005] In a first aspect, an embodiment of the present application provides a display panel, comprising:

[0006] substrate;

[0007] One or more light-emitting layers are located on one side of the substrate, and the light-emitting layers include a first sub-light-emitting layer, a second sub-light-emitting layer, and a third sub-light-emitting layer;

[0008] One or more first sub-light-emitting layers emit red light, and the intrinsic spectrum of the red light satisfies the following conditions: a peak wavelength of not less than 642 nanometers and not more than 646 nanometers, and a half-width of not less than 30 nanometers and not more than 70 nanometers;

[0009] One or more second light-emitting sub-layers emit green light, and the intrinsic spectrum of the green light satisfies the following conditions: a peak wavelength of not less than 525 nanometers and not more than 533 nanometers, and a half-width of not less than 20 nanometers and not more than 40 nanometers;

[0010] One or more third sub-light-emitting layers emit blue light, and the intrinsic spectrum of the blue light satisfies that the peak is not less than 458 nanometers and not more than 462 nanometers, and the half-maximum width is not less than 16 nanometers and not more than 30 nanometers.

[0011] In one possible implementation, the one or more first sub-light-emitting layers emit red light, and the peak of the intrinsic spectrum of the red light is 644 nanometers and the half-maximum width is 45 nanometers;

[0012] The one or more second light-emitting sub-layers emit green light, and the peak of the intrinsic spectrum of the green light is 529 nanometers and the half-maximum width is 27 nanometers;

[0013] The one or more third sub-light-emitting layers emit blue light, and the peak of the intrinsic spectrum of the blue light is 460 nanometers and the half-maximum width is 24 nanometers.

[0014] In a possible implementation, the first sub-light emitting layer, the second sub-light emitting layer, and the third sub-light emitting layer each include a light emitting material;

[0015] The intrinsic spectrum of light emitted by the luminescent material included in the first sub-light-emitting layer meets the intrinsic spectrum of red light;

[0016] The intrinsic spectrum of light emitted by the luminescent material included in the second sub-light-emitting layer satisfies the intrinsic spectrum of green light;

[0017] The intrinsic spectrum of light emitted by the luminescent material included in the third sub-light-emitting layer meets the intrinsic spectrum of blue light.

[0018] In a possible implementation, the first sub-light emitting layer, the second sub-light emitting layer, and the third sub-light emitting layer each include at least two light emitting materials;

[0019] The luminescence spectrum obtained by adding the intrinsic spectra of the light emitted by the at least two luminescent materials included in the first sub-luminescent layer meets the intrinsic spectrum of red light;

[0020] The luminescence spectrum obtained by adding the intrinsic spectra of the light emitted by the at least two luminescent materials included in the second luminescent sub-layer meets the intrinsic spectrum of green light;

[0021] The luminescence spectrum obtained by adding the intrinsic spectra of light emitted by at least two luminescent materials included in the third sub-luminescent layer meets the intrinsic spectrum of blue light.

[0022] In a possible implementation, the first sub-light emitting layer, the second sub-light emitting layer, and the third sub-light emitting layer each include at least two light emitting materials;

[0023] The intrinsic spectrum of light emitted by at least two luminescent materials included in the first sub-luminescent layer is set to ELA; the intrinsic spectrum of light emitted by each luminescent material is set to ELAi, and the luminous intensity of light emitted by each luminescent material is set to ai, 1≤i≤n;

[0024] ELA=a1·ELA1+a2·ELA2+……an·ELAn, ELA satisfies the intrinsic spectrum of red light;

[0025] The intrinsic spectrum of light emitted by at least two luminescent materials included in the second luminescent sublayer is set to ELB; the intrinsic spectrum of light emitted by various luminescent materials is set to ELBi, and the luminous intensity of light emitted by various luminescent materials is set to bi, 1≤i≤n;

[0026] ELB=b1·ELB1+b2·ELB2+……bn·ELBn, ELB satisfies the intrinsic spectrum of green light;

[0027] The intrinsic spectrum of light emitted by at least two luminescent materials included in the third sub-luminescent layer is set to ELC; the intrinsic spectrum of light emitted by each luminescent material is set to ELCi, and the luminous intensity of light emitted by each luminescent material is set to ci, 1≤i≤n;

[0028] ELC=c1·ELC1+c2·ELC2+……cn·ELCn, ELC satisfies the intrinsic spectrum of blue light.

[0029] In one possible implementation, the first sub-light-emitting layer, the second sub-light-emitting layer and the third sub-light-emitting layer each include a single film layer, and the single film layer includes at least two light-emitting materials; or, the first sub-light-emitting layer, the second sub-light-emitting layer and the third sub-light-emitting layer each include at least two stacked single film layers, and each single film layer includes a light-emitting material.

[0030] In a possible implementation, the display panel further includes: an anode layer, a hole injection layer, a hole transport layer, an electron transport layer, an electron injection layer, and a cathode layer;

[0031] The anode layer, the hole injection layer, the hole transport layer, the light emitting layer, the electron transport layer, the electron injection layer and the cathode layer are sequentially located on one side of the substrate.

[0032] In a possible implementation, the orthographic projections of the plurality of first sub-light-emitting layers on the substrate overlap, and a luminescence spectrum obtained by summing the intrinsic spectra of light emitted by the first sub-light-emitting layers satisfies the intrinsic spectrum of red light;

[0033] The orthographic projections of the plurality of second sub-light-emitting layers on the substrate overlap, and a luminescence spectrum obtained by summing the intrinsic spectra of light emitted by the second sub-light-emitting layers satisfies the intrinsic spectrum of green light;

[0034] The orthographic projections of the plurality of third sub-light emitting layers on the substrate overlap, and a light emitting spectrum obtained by adding the intrinsic spectra of the light emitted by each third sub-light emitting layer meets the intrinsic spectrum of blue light.

[0035] In one possible implementation, the orthographic projections of the plurality of first sub-light-emitting layers on the substrate overlap, and the intrinsic spectrum of the red light emitted is set to ELA; the intrinsic spectrum of the light emitted by each first sub-light-emitting layer is set to ELAi, and the luminous intensity of the light emitted by each first sub-light-emitting layer is set to ai, 1≤i≤n;

[0036] ELA=a1·ELA1+a2·ELA2+……an·ELAn, ELA satisfies the intrinsic spectrum of red light;

[0037] The orthographic projections of the plurality of second sub-light-emitting layers on the substrate overlap and the intrinsic spectrum of the green light emitted is set to ELB, the intrinsic spectrum of the light emitted by each second sub-light-emitting layer is set to ELBi, and the luminous intensity of the light emitted by each second sub-light-emitting layer is set to bi, 1≤i≤n;

[0038] ELB=b1·ELB1+b2·ELB2+……bn·ELBn, ELB satisfies the intrinsic spectrum of green light;

[0039] The orthographic projections of the plurality of third sub-light-emitting layers on the substrate overlap and the intrinsic spectrum of the blue light emitted is set to ELC, the intrinsic spectrum of the light emitted by each third sub-light-emitting layer is set to ELCi, and the luminous intensity of the light emitted by each third sub-light-emitting layer is set to ci, 1≤i≤n;

[0040] ELC=c1·ELC1+c2·ELC2+……cn·ELCn, ELC satisfies the intrinsic spectrum of blue light.

[0041] In one possible implementation, the display panel further includes: an anode layer, a hole injection layer, a first hole transport layer, a first electron transport layer, a charge generation layer, a second hole transport layer, a second electron transport layer, and a cathode layer;

[0042] The plurality of light-emitting layers includes a first light-emitting layer and a second light-emitting layer;

[0043] The first light-emitting layer and the second light-emitting layer each include a first sub-light-emitting layer, a second sub-light-emitting layer and a third sub-light-emitting layer; the plurality of first sub-light-emitting layers emit red light, the plurality of second sub-light-emitting layers emit green light, and the plurality of third sub-light-emitting layers emit blue light;

[0044] The anode layer, hole injection layer, first hole transport layer, first light emitting layer, first electron transport layer, charge generation layer, second hole transport layer, second light emitting layer, second electron transport layer and cathode layer are sequentially located on one side of the substrate.

[0045] In a second aspect, an embodiment of the present application provides a display device, comprising the display panel according to the first aspect.

[0046] The beneficial technical effects brought about by the technical solutions provided in the embodiments of the present application include:

[0047] The display panel provided by the embodiment of the present application includes a substrate and one or more light-emitting layers, wherein the light-emitting layers include a first sub-light-emitting layer, a second sub-light-emitting layer, and a third sub-light-emitting layer. One or more of the first sub-light-emitting layers emit red light, and the intrinsic spectrum of the red light satisfies the following conditions: a peak of not less than 642 nanometers and not more than 646 nanometers, and a half-width of not less than 30 nanometers and not more than 70 nanometers; one or more of the second sub-light-emitting layers emit green light, and the intrinsic spectrum of the green light satisfies the following conditions: a peak of not less than 525 nanometers and not more than 533 nanometers, and a half-width of not less than 20 nanometers and not more than 40 nanometers; and one or more of the third sub-light-emitting layers emit blue light, and the intrinsic spectrum of the blue light satisfies the following conditions: a peak of not less than 458 nanometers and not more than 462 nanometers, and a half-width of not less than 16 nanometers and not more than 30 nanometers. The embodiment of the present application can significantly improve the color gamut, efficiency, viewing angle brightness, and viewing angle color deviation of the display panel by arranging one or more light-emitting layers to emit a combination of red, green, and blue light spectra.

[0048] Additional aspects and advantages of the present application will be given in part in the following description, which will become apparent from the following description, or will be learned through practice of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0049] The above and / or additional aspects and advantages of the present application will become apparent and easily understood from the following description of the embodiments in conjunction with the accompanying drawings, in which:

[0050] Figure 1 A schematic diagram of a color shift curve in the prior art;

[0051] Figure 2 A schematic diagram comparing color shifts of the prior art and the embodiments of the present application;

[0052] Figure 3 A schematic structural diagram of a display panel provided in an embodiment of the present application;

[0053] Figure 4 A schematic structural diagram of another display panel provided in an embodiment of the present application;

[0054] Figure 5 This is a structural diagram of another display panel provided in an embodiment of the present application.

[0055] Reference numerals:

[0056] 101-substrate and anode layer, 102-hole injection layer, 103-hole transport layer, 104-light-emitting layer, 105-electron transport layer, 106-electron injection layer, 107-cathode layer, 108-optical functional layer, 109-protective layer and encapsulation layer, 110-first hole transport layer, 111-first light-emitting layer, 112-first electron transport layer, 113-charge generation layer, 114-second hole transport layer, 115-second light-emitting layer, 116-second electron transport layer, 117-cathode layer and light extraction layer. DETAILED DESCRIPTION

[0057] The present application is described in detail below. Examples of embodiments of the present application are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar components or components having the same or similar functions. In addition, if the detailed description of the known technology is not necessary for the features of the present application shown, it will be omitted. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present application and are not to be construed as limiting the present application.

[0058] It will be understood by those skilled in the art that, unless otherwise defined, all terms (including technical and scientific terms) used herein have the same meaning as commonly understood by those skilled in the art to which this application belongs. It should also be understood that terms such as those defined in common dictionaries should be understood to have meanings consistent with their meanings in the context of the prior art and will not be interpreted in an idealized or overly formal sense unless specifically defined as herein.

[0059] It will be understood by those skilled in the art that, unless expressly stated otherwise, the singular forms "a", "an", "said" and "the" used herein may also include the plural forms. It should be further understood that the term "comprising" used in the specification of the present application refers to the presence of the features, integers, steps, operations, elements and / or components, but does not exclude the presence or addition of one or more other features, integers, steps, operations, elements, components and / or groups thereof. It should be understood that when we refer to an element as being "connected" or "coupled" to another element, it may be directly connected or coupled to the other element, or there may be intermediate elements. In addition, "connected" or "coupled" as used herein may include wireless connections or wireless couplings. The term "and / or" used herein includes all or any units and all combinations of one or more associated listed items.

[0060] The color gamut coverage of existing conventional display panels is only about 85% of BT2020. By adjusting the color gamut coverage of the display panel structure, it can only reach about 90%, but at the same time, it causes a serious decline in efficiency and viewing angle brightness, and a serious deviation in the visual color deviation trajectory. Figure 1 and as shown in Table 1. Figure 1The conventional devices in Table 1 represent display panels using conventional devices. BT2020 is an HDR (High Dynamic Range) color gamut.

[0061] Table 1 Efficiency, color gamut coverage, and viewing angle brightness of conventional devices

[0062]

[0063] The CIE 1931XYZ color space (also called the CIE 1931 color space) is one of the first color spaces to be defined mathematically. It was created in 1931 by the International Commission on Illumination (CIE).

[0064] The CIE xyY chromaticity diagram is a color space derived directly from the XYZ color space. It describes color using a luminance Y parameter and color coordinates x,y. The Y value in xyY corresponds to the Y stimulus value in XYZ, representing the brightness or luminance of the color. The color coordinates x,y are used to specify the color on a two-dimensional graph. This chromaticity diagram is called the CIE 1931 Chromaticity Diagram.

[0065] The display panel and display device provided in this application are intended to solve the above technical problems in the prior art.

[0066] The following describes in detail the technical solution of the present application and how the technical solution of the present application solves the above-mentioned technical problems with specific embodiments.

[0067] An embodiment of the present application provides a display panel. Optionally, the display panel includes an OLED display panel.

[0068] The display panel includes a substrate and one or more light-emitting layers. The one or more light-emitting layers are located on one side of the substrate, and the light-emitting layers include a first sub-light-emitting layer, a second sub-light-emitting layer, and a third sub-light-emitting layer.

[0069] The one or more first light-emitting sub-layers emit red light, and the intrinsic spectrum of the red light R satisfies the following conditions: a peak value of not less than 642 nanometers and not more than 646 nanometers, and a full width at half maximum (FWHM) of not less than 30 nanometers and not more than 70 nanometers;

[0070] One or more second light-emitting sub-layers emit green light, and the intrinsic spectrum of the green light G satisfies the following conditions: a peak value of not less than 525 nanometers and not more than 533 nanometers, and a full width at half maximum (FWHM) of not less than 20 nanometers and not more than 40 nanometers;

[0071] The one or more third sub-light-emitting layers emit blue light, and the intrinsic spectrum of the blue light B satisfies that the peak value (Peak) is not less than 458 nanometers and not more than 462 nanometers, and the full width at half maximum (FWHM) is not less than 16 nanometers and not more than 30 nanometers.

[0072] The display panel provided by the embodiment of the present application includes a substrate and one or more light-emitting layers, wherein the light-emitting layers include a first sub-light-emitting layer, a second sub-light-emitting layer, and a third sub-light-emitting layer. One or more of the first sub-light-emitting layers emit red light, and the intrinsic spectrum of the red light satisfies the following conditions: a peak of not less than 642 nanometers and not more than 646 nanometers, and a half-width of not less than 30 nanometers and not more than 70 nanometers; one or more of the second sub-light-emitting layers emit green light, and the intrinsic spectrum of the green light satisfies the following conditions: a peak of not less than 525 nanometers and not more than 533 nanometers, and a half-width of not less than 20 nanometers and not more than 40 nanometers; and one or more of the third sub-light-emitting layers emit blue light, and the intrinsic spectrum of the blue light satisfies the following conditions: a peak of not less than 458 nanometers and not more than 462 nanometers, and a half-width of not less than 16 nanometers and not more than 30 nanometers. The embodiment of the present application can significantly improve the color gamut, efficiency, viewing angle brightness, and viewing angle color deviation of the display panel by arranging one or more light-emitting layers to emit a combination of red, green, and blue light spectra.

[0073] After many tests, the visual color chromatic aberration of the display panel provided in the embodiment of the present application is close to that of a conventional display panel. Compared with conventional devices under the BT2020 color gamut, the color gamut coverage of the display panel can reach 95%, the efficiency is improved by 30%, and the visual color chromatic aberration and viewing angle brightness are significantly improved.

[0074] like Figure 2 and as shown in Table 2. Figure 2 The conventional devices in Table 2 represent display panels using conventional devices, and the patented devices represent display panels provided by the embodiments of the present application.

[0075] Table 2 Efficiency, color gamut coverage, and viewing angle brightness of each device

[0076] CIE xy W Eff. BT2020 color gamut coverage 30 45 60 Conventional devices 100％ 85％ 73.4％ 41.2％ 21.0％ Conventional devices-BT2020 color gamut 63％ 89％ 64.9％ 37.2％ 19.7％ Patented device-BT2020 color gamut 93％ 95％ 72.8％ 40.1％ 20.3％

[0077] In some embodiments, the one or more first sub-light-emitting layers emit red light, and the peak of the intrinsic spectrum of the red light R is 644 nanometers and the full width at half maximum (FWHM) is 45 nanometers.

[0078] The one or more second light-emitting sub-layers emit green light, and the peak of the intrinsic spectrum of the green light G is 529 nanometers and the full width at half maximum (FWHM) is 27 nanometers;

[0079] The one or more third sub-light emitting layers emit blue light, and the peak of the intrinsic spectrum of the blue light B is 460 nanometers and the full width at half maximum (FWHM) is 24 nanometers.

[0080] Optionally, in some embodiments, the first sub-light emitting layer, the second sub-light emitting layer, and the third sub-light emitting layer each include a light emitting material;

[0081] The intrinsic spectrum of light emitted by the luminescent material included in the first sub-light-emitting layer meets the intrinsic spectrum of red light;

[0082] The intrinsic spectrum of light emitted by the luminescent material included in the second sub-light-emitting layer satisfies the intrinsic spectrum of green light;

[0083] The intrinsic spectrum of light emitted by the luminescent material included in the third sub-light-emitting layer meets the intrinsic spectrum of blue light.

[0084] Optionally, in some embodiments, the first sub-light emitting layer, the second sub-light emitting layer, and the third sub-light emitting layer each include at least two light emitting materials;

[0085] The luminescence spectrum obtained by adding the intrinsic spectra of the light emitted by the at least two luminescent materials included in the first sub-luminescent layer meets the intrinsic spectrum of the red light R;

[0086] The luminescence spectrum obtained by adding the intrinsic spectra of the light emitted by the at least two luminescent materials included in the second sub-luminescent layer meets the intrinsic spectrum of the green light G;

[0087] The luminescence spectrum obtained by adding the intrinsic spectra of light emitted by at least two luminescent materials included in the third sub-luminescent layer meets the intrinsic spectrum of blue light B.

[0088] Optionally, in some embodiments, the first sub-light emitting layer, the second sub-light emitting layer, and the third sub-light emitting layer each include at least two light emitting materials;

[0089] The intrinsic spectrum of light emitted by at least two luminescent materials included in the first sub-light-emitting layer is set to ELA; the intrinsic spectrum of light emitted by various luminescent materials is set to ELAi, and the luminous intensity of light emitted by various luminescent materials is set to ai, 1≤i≤n; that is, ELA1, ELA2...ELAn are the intrinsic spectra of the luminescent materials constituting the first sub-light-emitting layer, a1, a2...an are the corresponding spectral intensity proportions respectively, and ELA is the summed spectrum of the first sub-light-emitting layer.

[0090] ELA=a1·ELA1+a2·ELA2+……an·ELAn, ELA satisfies the intrinsic spectrum of red light R;

[0091] The intrinsic spectrum of light emitted by at least two luminescent materials included in the second sub-light-emitting layer is set to ELB; the intrinsic spectrum of light emitted by various luminescent materials is set to ELBi, and the luminous intensity of light emitted by various luminescent materials is set to bi, 1≤i≤n; that is, ELB1, ELB2...ELBn are the intrinsic spectra of the luminescent materials constituting the second sub-light-emitting layer, b1, b2...bn are the corresponding spectral intensity proportions respectively, and ELB is the summed spectrum of the second sub-light-emitting layer.

[0092] ELB=b1·ELB1+b2·ELB2+……bn·ELBn, ELB satisfies the intrinsic spectrum of green light G;

[0093] The intrinsic spectrum of light emitted by at least two luminescent materials included in the third sub-light-emitting layer is set to ELC; the intrinsic spectrum of light emitted by various luminescent materials is set to ELCi, and the luminous intensity of light emitted by various luminescent materials is set to ci, 1≤i≤n; that is, ELC1, ELC2...ELCn are the intrinsic spectra of the luminescent materials that constitute the third sub-light-emitting layer, c1, c2...cn are the corresponding spectral intensity proportions respectively, and ELC is the sum spectrum of the third sub-light-emitting layer.

[0094] ELC=c1·ELC1+c2·ELC2+…cn·ELCn, ELC satisfies the intrinsic spectrum of blue light B.

[0095] In some embodiments, the first sub-light-emitting layer, the second sub-light-emitting layer, and the third sub-light-emitting layer each include a single film layer, and the single film layer includes at least two light-emitting materials; the display panel can be prepared by a mixed evaporation method.

[0096] Alternatively, in some other embodiments, the first sub-light emitting layer, the second sub-light emitting layer, and the third sub-light emitting layer each include at least two stacked single film layers, each single film layer including a light emitting material. The display panel can be manufactured by stacked evaporation.

[0097] In some embodiments, as Figure 3 and Figure 4 As shown, the display panel further includes: an anode layer, a hole injection layer 102, a hole transport layer 103, an electron transport layer 105, an electron injection layer 106 and a cathode layer 107;

[0098] The anode layer, hole injection layer 102, hole transport layer 103, light emitting layer 104, electron transport layer 105, electron injection layer 106, cathode layer 107, optical functional layer 108, protective layer and encapsulation layer 109 are sequentially located on one side of the substrate.

[0099] Figure 3 and Figure 4It is a simplified schematic diagram. In practice, the anode layer is located on one side of the substrate; the protective layer is located on the side of the optical functional layer 108 away from the substrate; and the encapsulation layer is located on the side of the protective layer away from the substrate.

[0100] Figure 3 The display panel includes a light-emitting layer 104, and the first sub-light-emitting layer, the second sub-light-emitting layer and the third sub-light-emitting layer respectively include a light-emitting material.

[0101] Figure 4 The display panel includes a light-emitting layer 104, wherein the first, second, and third sub-light-emitting layers each include at least two light-emitting materials. The first, second, and third sub-light-emitting layers each include at least two stacked single film layers, each including one light-emitting material. The display panel can be manufactured using a stacked evaporation method.

[0102] In some embodiments, the orthographic projections of the plurality of first sub-light-emitting layers on the substrate overlap, and a light emission spectrum obtained by summing the intrinsic spectra of light emitted by each first sub-light-emitting layer satisfies the intrinsic spectrum of red light;

[0103] The orthographic projections of the plurality of second sub-light-emitting layers on the substrate overlap, and a luminescence spectrum obtained by summing the intrinsic spectra of light emitted by the second sub-light-emitting layers satisfies the intrinsic spectrum of green light;

[0104] The orthographic projections of the plurality of third sub-light emitting layers on the substrate overlap, and a light emitting spectrum obtained by adding the intrinsic spectra of the light emitted by each third sub-light emitting layer meets the intrinsic spectrum of blue light.

[0105] In other embodiments, the orthographic projections of multiple first sub-light-emitting layers on the substrate overlap and the intrinsic spectrum of the emitted red light is set to ELA; the intrinsic spectrum of the light emitted by each first sub-light-emitting layer is set to ELAi, and the luminous intensity of the light emitted by each first sub-light-emitting layer is set to ai, 1≤i≤n; that is, ELA1, ELA2...ELAn are the intrinsic spectra of the multiple first sub-light-emitting layers, a1, a2...an are the corresponding spectral intensity proportions, and ELA is the summed spectrum of the multiple first sub-light-emitting layers.

[0106] ELA=a1·ELA1+a2·ELA2+……an·ELAn, ELA satisfies the intrinsic spectrum of red light R;

[0107] The orthographic projections of the multiple second sub-light-emitting layers on the substrate overlap, and the intrinsic spectrum of the green light emitted is set to ELB, the intrinsic spectrum of the light emitted by each second sub-light-emitting layer is set to ELBi, and the luminous intensity of the light emitted by each second sub-light-emitting layer is set to bi,1≤i≤n; that is, ELB1, ELB2...ELBn are the intrinsic spectra of the multiple second sub-light-emitting layers, b1, b2...bn are the corresponding spectral intensity proportions, and ELB is the summed spectrum of the multiple second sub-light-emitting layers.

[0108] ELB=b1·ELB1+b2·ELB2+……bn·ELBn, ELB satisfies the intrinsic spectrum of green light G;

[0109] The orthographic projections of multiple third sub-light-emitting layers on the substrate overlap, and the intrinsic spectrum of the blue light emitted is set to ELC, the intrinsic spectrum of the light emitted by each third sub-light-emitting layer is set to ELCi, and the luminous intensity of the light emitted by each third sub-light-emitting layer is set to ci, 1≤i≤n; that is, ELC1, ELC2...ELCn are the intrinsic spectra of the multiple third sub-light-emitting layers, c1, c2...cn are the corresponding spectral intensity proportions, and ELC is the summed spectrum of the multiple third sub-light-emitting layers.

[0110] ELC=c1·ELC1+c2·ELC2+…cn·ELCn, ELC satisfies the intrinsic spectrum of blue light B.

[0111] In some embodiments, as Figure 5 As shown, the display panel further includes: an anode layer, a hole injection layer 102, a first hole transport layer 110, a first electron transport layer 112, a charge generation layer 113, a second hole transport layer 114, a second electron transport layer 116, a cathode layer and a light extraction layer 117;

[0112] The plurality of light-emitting layers include a first light-emitting layer 111 and a second light-emitting layer 115;

[0113] The first light-emitting layer 111 and the second light-emitting layer 115 each include a first sub-light-emitting layer, a second sub-light-emitting layer, and a third sub-light-emitting layer; the plurality of first sub-light-emitting layers emit red light, and the orthographic projections of the plurality of first sub-light-emitting layers on the substrate overlap; the plurality of second sub-light-emitting layers emit green light, and the orthographic projections of the plurality of second sub-light-emitting layers on the substrate overlap; the plurality of third sub-light-emitting layers emit blue light, and the orthographic projections of the plurality of third sub-light-emitting layers on the substrate overlap;

[0114] The anode layer, the hole injection layer 102, the first hole transport layer 110, the first light-emitting layer 111, the first electron transport layer 112, the charge generation layer 113, the second hole transport layer 114, the second light-emitting layer 115, the second electron transport layer 116, the cathode layer and the light extraction layer 117 are located in sequence on one side of the substrate.

[0115] Figure 5 For simplified schematic diagram, in practice, the anode layer is located on one side of the substrate; the cathode layer is located on the side of the second electron transport layer 116 away from the substrate; and the light extraction layer is located on the side of the cathode layer away from the substrate.

[0116] The embodiments of the present application employ multiple light-emitting layers, and the first, second, and third sub-light-emitting layers of each light-emitting layer may also include one or more light-emitting materials. As long as the sum of the intrinsic spectra of the first sub-light-emitting layer or the sum of the intensity spectra meets the intrinsic spectrum of red light, the sum of the intrinsic spectra of the second sub-light-emitting layer or the sum of the intensity spectra meets the intrinsic spectrum of green light, and the sum of the intrinsic spectra of the third sub-light-emitting layer or the sum of the intensity spectra meets the intrinsic spectrum of blue light, detailed embodiments can be found in the above description and will not be repeated here.

[0117] The display panel provided in the embodiment of the present application may use one or more light-emitting layers and one or more light-emitting materials. As long as they can meet the above-mentioned intrinsic spectra of red light, green light and blue light, they can significantly improve the color gamut, efficiency, viewing angle brightness and viewing angle color deviation of the display panel.

[0118] Based on the same inventive concept, an embodiment of the present application provides a display device, including a display panel provided in any of the above embodiments.

[0119] The display device provided in the embodiment of the present application has the same inventive concept and the same beneficial effects as the previous embodiments. The contents not shown in detail in the display device can be referred to the previous embodiments and will not be repeated here.

[0120] By applying the embodiments of the present application, at least the following beneficial effects can be achieved:

[0121] The display panel provided by the embodiment of the present application includes a substrate and one or more light-emitting layers, wherein the light-emitting layers include a first sub-light-emitting layer, a second sub-light-emitting layer, and a third sub-light-emitting layer. One or more of the first sub-light-emitting layers emit red light, and the intrinsic spectrum of the red light satisfies the following conditions: a peak of not less than 642 nanometers and not more than 646 nanometers, and a half-width of not less than 30 nanometers and not more than 70 nanometers; one or more of the second sub-light-emitting layers emit green light, and the intrinsic spectrum of the green light satisfies the following conditions: a peak of not less than 525 nanometers and not more than 533 nanometers, and a half-width of not less than 20 nanometers and not more than 40 nanometers; and one or more of the third sub-light-emitting layers emit blue light, and the intrinsic spectrum of the blue light satisfies the following conditions: a peak of not less than 458 nanometers and not more than 462 nanometers, and a half-width of not less than 16 nanometers and not more than 30 nanometers. The embodiment of the present application can significantly improve the color gamut, efficiency, viewing angle brightness, and viewing angle color deviation of the display panel by arranging one or more light-emitting layers to emit a combination of red, green, and blue light spectra.

[0122] Those skilled in the art will appreciate that the steps, measures, and schemes in the various operations, methods, and processes discussed in this application may be interchanged, modified, combined, or deleted. Furthermore, other steps, measures, and schemes in the various operations, methods, and processes discussed in this application may also be interchanged, modified, rearranged, decomposed, combined, or deleted. Furthermore, steps, measures, and schemes in the prior art that are similar to those disclosed in this application may also be interchanged, modified, rearranged, decomposed, combined, or deleted.

[0123] In the description of this application, it should be understood that the terms "center", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on this application.

[0124] The terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features being referred to. Thus, a feature specified as "first" or "second" may explicitly or implicitly include one or more of such features. Throughout this application, unless otherwise specified, "plurality" means two or more.

[0125] In the description of this application, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood broadly. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to direct connections, indirect connections through an intermediate medium, or internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in this application based on the specific circumstances.

[0126] In the description of this specification, specific features, structures, materials or characteristics may be combined in an appropriate manner in any one or more embodiments or examples.

[0127] It should be understood that although the steps in the flowcharts of the accompanying drawings are shown in sequence as indicated by the arrows, these steps are not necessarily executed in the order indicated by the arrows. Unless otherwise specified herein, there is no strict order restriction on the execution of these steps, and they can be executed in other orders. Moreover, at least some of the steps in the flowcharts of the accompanying drawings may include multiple sub-steps or multiple stages, and these sub-steps or stages are not necessarily executed at the same time, but can be executed at different times, and their execution order is not necessarily sequential, but can be executed in turn or alternately with other steps or at least a portion of the sub-steps or stages of other steps.

[0128] The above description is only part of the implementation methods of the present application. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principles of the present application. These improvements and modifications should also be regarded as the scope of protection of the present application.

Claims

1. A display panel, characterized in that: include: substrate; One or more light-emitting layers, located on one side of the substrate, the light-emitting layers including a first sub-light-emitting layer, a second sub-light-emitting layer and a third sub-light-emitting layer; One or more of the first sub-light-emitting layers emit red light, and the intrinsic spectrum of the red light satisfies the following conditions: a peak wavelength of not less than 642 nanometers and not more than 646 nanometers, and a half-width of not less than 30 nanometers and not more than 70 nanometers; One or more of the second light-emitting sub-layers emit green light, and the intrinsic spectrum of the green light satisfies the following conditions: a peak wavelength of not less than 525 nanometers and not more than 533 nanometers, and a half-width of not less than 20 nanometers and not more than 40 nanometers; One or more of the third sub-light-emitting layers emit blue light, and the intrinsic spectrum of the blue light satisfies that the peak is not less than 458 nanometers and not more than 462 nanometers, and the half-maximum width is not less than 16 nanometers and not more than 30 nanometers.

2. The display panel according to claim 1, wherein: One or more of the first sub-light-emitting layers emit red light, and the peak of the intrinsic spectrum of the red light is 644 nanometers and the half-maximum width is 45 nanometers; One or more of the second light-emitting sub-layers emit green light, and the peak of the intrinsic spectrum of the green light is 529 nanometers and the half-maximum width is 27 nanometers; One or more third light-emitting sub-layers emit blue light, and the peak of the intrinsic spectrum of the blue light is 460 nanometers and the half-maximum width is 24 nanometers.

3. The display panel according to claim 1, wherein The first sub-light emitting layer, the second sub-light emitting layer and the third sub-light emitting layer respectively include a light emitting material; The intrinsic spectrum of light emitted by the luminescent material included in the first sub-light-emitting layer satisfies the intrinsic spectrum of red light; The intrinsic spectrum of light emitted by the luminescent material included in the second sub-light-emitting layer satisfies the intrinsic spectrum of green light; The intrinsic spectrum of light emitted by the luminescent material included in the third sub-light-emitting layer meets the intrinsic spectrum of blue light.

4. The display panel according to claim 1, wherein: The first sub-light emitting layer, the second sub-light emitting layer and the third sub-light emitting layer respectively include at least two light emitting materials; The luminescence spectrum obtained by adding the intrinsic spectra of the light emitted by the at least two luminescent materials included in the first luminescent sub-layer meets the intrinsic spectrum of red light; The luminescence spectrum obtained by adding the intrinsic spectra of the light emitted by the at least two luminescent materials included in the second luminescent sub-layer meets the intrinsic spectrum of green light; The luminescence spectrum obtained by adding the intrinsic spectra of light emitted by at least two luminescent materials included in the third sub-luminescent layer meets the intrinsic spectrum of blue light.

5. The display panel according to claim 1, wherein: The first sub-light emitting layer, the second sub-light emitting layer and the third sub-light emitting layer respectively include at least two light emitting materials; The intrinsic spectrum of light emitted by at least two luminescent materials included in the first sub-light-emitting layer is set to ELA; the intrinsic spectrum of light emitted by various luminescent materials is set to ELAi, and the luminous intensity of light emitted by various luminescent materials is set to ai, 1≤i≤n; ELA=a1·ELA1+a2·ELA2+……an·ELAn, ELA satisfies the intrinsic spectrum of red light; The intrinsic spectrum of light emitted by at least two luminescent materials included in the second luminescent sub-layer is set to ELB; the intrinsic spectrum of light emitted by various luminescent materials is set to ELBi, and the luminous intensity of light emitted by various luminescent materials is set to bi, 1≤i≤n; ELB=b1·ELB1+b2·ELB2+……bn·ELBn, ELB satisfies the intrinsic spectrum of green light; The intrinsic spectrum of light emitted by at least two luminescent materials included in the third sub-light-emitting layer is set to ELC; the intrinsic spectrum of light emitted by each luminescent material is set to ELC i, and the luminous intensity of light emitted by each luminescent material is set to ci, 1≤i≤n; ELC=c1·ELC1+c2·ELC2+……cn·ELCn, ELC satisfies the intrinsic spectrum of blue light.

6. The display panel according to claim 4 or 5, characterized in that: The first sub-light-emitting layer, the second sub-light-emitting layer and the third sub-light-emitting layer each include a single film layer, and the single film layer includes at least two light-emitting materials; or, the first sub-light-emitting layer, the second sub-light-emitting layer and the third sub-light-emitting layer each include at least two stacked single film layers, and each single film layer includes a light-emitting material.

7. The display panel according to any one of claims 3 to 5, characterized in that: The display panel further comprises: an anode layer, a hole injection layer, a hole transport layer, an electron transport layer, an electron injection layer and a cathode layer; The anode layer, the hole injection layer, the hole transport layer, the light emitting layer, the electron transport layer, the electron injection layer and the cathode layer are sequentially located on one side of the substrate.

8. The display panel according to claim 1, wherein: The orthographic projections of the plurality of first sub-light-emitting layers on the substrate overlap, and a light-emitting spectrum obtained by adding the intrinsic spectra of light emitted by the first sub-light-emitting layers satisfies the intrinsic spectrum of red light; The orthographic projections of the plurality of second light-emitting sub-layers on the substrate overlap, and a light-emitting spectrum obtained by adding the intrinsic spectra of light emitted by the second light-emitting sub-layers satisfies the intrinsic spectrum of green light; The orthographic projections of the plurality of third sub-light emitting layers on the substrate overlap, and a light emission spectrum obtained by adding the intrinsic spectra of light emitted by the respective third sub-light emitting layers satisfies the intrinsic spectrum of blue light.

9. The display panel according to claim 1, wherein: The orthographic projections of the plurality of first sub-light-emitting layers on the substrate overlap, and the intrinsic spectrum of the red light emitted is set to ELA; the intrinsic spectrum of the light emitted by each of the first sub-light-emitting layers is set to ELAi, and the luminous intensity of the light emitted by each of the first sub-light-emitting layers is set to ai, 1≤i≤n; ELA=a1·ELA1+a2·ELA2+……an·ELAn, ELA satisfies the intrinsic spectrum of red light; The orthographic projections of the plurality of second sub-light-emitting layers on the substrate overlap and the intrinsic spectrum of the green light emitted is set to ELB, the intrinsic spectrum of the light emitted by each of the second sub-light-emitting layers is set to ELBi, and the luminous intensity of the light emitted by each of the second sub-light-emitting layers is set to bi, 1≤i≤n; ELB=b1·ELB1+b2·ELB2+……bn·ELBn, ELB satisfies the intrinsic spectrum of green light; The orthographic projections of the plurality of third sub-light-emitting layers on the substrate overlap, and the intrinsic spectrum of the blue light emitted is set to ELC, the intrinsic spectrum of the light emitted by each of the third sub-light-emitting layers is set to ELC i, and the luminous intensity of the light emitted by each of the third sub-light-emitting layers is set to ci, 1≤i≤n; ELC=c1·ELC1+c2·ELC2+……cn·ELCn, ELC satisfies the intrinsic spectrum of blue light.

10. The display panel according to claim 8 or 9, characterized in that: The display panel further includes: an anode layer, a hole injection layer, a first hole transport layer, a first electron transport layer, a charge generation layer, a second hole transport layer, a second electron transport layer and a cathode layer; The plurality of light-emitting layers include a first light-emitting layer and a second light-emitting layer; The first light-emitting layer and the second light-emitting layer each include a first sub-light-emitting layer, a second sub-light-emitting layer and a third sub-light-emitting layer; the plurality of first sub-light-emitting layers emit red light, the plurality of second sub-light-emitting layers emit green light, and the plurality of third sub-light-emitting layers emit blue light; The anode layer, the hole injection layer, the first hole transport layer, the first light-emitting layer, the first electron transport layer, the charge generation layer, the second hole transport layer, the second light-emitting layer, the second electron transport layer and the cathode layer are sequentially located on one side of the substrate.

11. A display device, characterized in that: The display panel comprises the display panel according to any one of claims 1 to 10.

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