Display panel and display apparatus

Abstract

The present application relates to the technical field of display, and provides a display panel and a display apparatus. The display panel comprises: a plurality of light-emitting devices arranged in an array and located on a substrate, a color conversion layer and a filter layer. The color conversion layer is located on the light exit side of the light-emitting devices, and the color conversion layer comprises a green conversion pattern. The filter layer is located on the side of the color conversion layer distant from the light-emitting devices, the filter layer comprises a green filter pattern, and the orthographic projection of the green filter pattern on the substrate overlaps the orthographic projection of the green conversion pattern on the substrate, wherein the absolute value of the difference between a wavelength at a peak position of the spectrum of the green filter pattern and a wavelength at a first peak position of the spectrum of the green conversion pattern is less than or equal to 10 nm. The display panel facilitates the manufacturing of a display apparatus having high color gamut.

Description

Display panel and display device 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] With the rapid development of various display technologies, customers are increasingly demanding the color display performance of display products. In related technologies, for display products using quantum dot technology, a blue backlight source is typically used to excite the quantum dot (QD) color conversion layer to emit light. However, in actual applications, the quantum dot (QD) color conversion layer cannot completely absorb the blue backlight source, resulting in some blue light leakage. Even when a color filter (CF) is installed on the light-emitting side of the quantum dot (QD) color conversion layer, it is difficult to further improve the color gamut of the display product.

[0003] Among them, color gamut refers to the range of colors that can be expressed by a certain color representation mode, and also refers to the color range that can be expressed by specific devices such as monitors, printers, and other printing and reproduction devices.

[0004] Summary of the Invention

[0005] The embodiments of this application adopt the following technical solutions:

[0006] In a first aspect, an embodiment of the present application provides a display panel, comprising:

[0007] A plurality of light-emitting devices arranged in an array on the substrate;

[0008] A color conversion layer, located on the light-emitting side of the light-emitting device, comprising a green conversion pattern;

[0009] a filter layer located on a side of the color conversion layer away from the light-emitting device; the filter layer comprising a green filter pattern, wherein an orthographic projection of the green filter pattern on the substrate overlaps with an orthographic projection of the green conversion pattern on the substrate;

[0010] The absolute value of the difference between the wavelength at the peak position of the spectrum of the green filter pattern and the wavelength at the first peak position of the spectrum of the green conversion pattern is less than or equal to 10 nm.

[0011] In at least one display panel provided in an embodiment of the present application, the half-maximum width of the spectrum of the green filter pattern is greater than or equal to 1.5 times the first half-maximum width of the spectrum of the green conversion pattern, and less than or equal to 3 times the first half-maximum width of the spectrum of the green conversion pattern.

[0012] In at least one display panel provided in an embodiment of the present application, the light emitting colors of the plurality of light emitting devices are all blue; the spectrum of the green conversion pattern includes a first wavelength band and a second wavelength band, the first wavelength band is a green light wavelength band, and the second wavelength band is a blue light wavelength band; the wavelength of the second wavelength band is smaller than the wavelength of the first wavelength band;

[0013] The first wave crest and the first half-peak width are the wave crest and half-peak width of the first wave band respectively;

[0014] The wavelength of the starting point at the half-maximum width position of the spectrum of the green filter pattern is greater than or equal to the wavelength of the starting point at the first half-maximum width position of the spectrum of the green conversion pattern minus 25 nm, and the wavelength of the starting point at the half-maximum width position of the spectrum of the green filter pattern is less than or equal to the wavelength of the starting point at the first half-maximum width position of the spectrum of the green conversion pattern minus 5 nm.

[0015] In at least one display panel provided in an embodiment of the present application, a wavelength at an end point of the half-width of the spectrum of the green filter pattern is greater than or equal to a wavelength at an end point of the first half-width of the spectrum of the green conversion pattern plus 10 nm, and a wavelength at an end point of the half-width of the spectrum of the green filter pattern is less than or equal to a wavelength at an end point of the first half-width of the spectrum of the green conversion pattern plus 35 nm.

[0016] In at least one display panel provided by an embodiment of the present application, the half-value width of the second wavelength band of the spectrum of the green conversion pattern is the second half-value width;

[0017] The starting wavelength of the spectrum of the green filter pattern is greater than or equal to the starting wavelength of the second wavelength band, and less than or equal to the sum of the starting wavelength of the second wavelength band and ¾ times the second half-width.

[0018] In at least one display panel provided in an embodiment of the present application, the starting wavelength of the first band in the spectrum of the green conversion pattern is greater than or equal to the sum of the starting wavelength of the second band and 3 / 4 times the second half-width, and less than or equal to the sum of the starting wavelength of the second band and 3 / 2 times the second half-width.

[0019] In at least one display panel provided in an embodiment of the present application, a wavelength at a point where the first wavelength band in the spectrum of the green conversion pattern overlaps with the spectrum of the green filter pattern at an end position is greater than or equal to the sum of the wavelength at a first peak position of the spectrum of the green conversion pattern and twice the first half-width, and is less than or equal to the sum of the wavelength at the first peak position of the spectrum of the green conversion pattern and five times the first half-width.

[0020] In at least one display panel provided in an embodiment of the present application, the first sub-pixel, the second sub-pixel, and the third sub-pixel of the display panel; the first sub-pixel includes the light-emitting device, the green conversion pattern, and the green filter pattern sequentially arranged on the substrate;

[0021] The wavelength range of the first peak position of the spectrum of the green conversion pattern is 520 nm to 550 nm, the starting wavelength range of the second peak of the spectrum of the green conversion pattern is 450 nm to 460 nm, the wavelength range of the starting point of the first half-maximum width position of the spectrum of the green conversion pattern is 495 nm to 530 nm, and the wavelength range of the ending point of the first half-maximum width position of the spectrum of the green conversion pattern is 535 nm to 570 nm.

[0022] In at least one display panel provided in an embodiment of the present application, the wavelength range at the peak position of the spectrum of the green filter pattern is 520 nm to 540 nm, the starting wavelength range of the spectrum of the green filter pattern is 460 nm to 470 nm, the starting wavelength range of the first wavelength band in the spectrum of the green conversion pattern is 475 nm to 490 nm, the wavelength range of the point where the first wavelength band in the spectrum of the green conversion pattern overlaps with the spectrum of the green filter pattern at the end position is 620 nm to 680 nm, the wavelength range of the end point of the half-maximum width of the spectrum of the green filter pattern is 570 nm to 590 nm, and the wavelength range of the starting point of the half-maximum width of the spectrum of the green filter pattern is 480 nm to 495 nm.

[0023] In at least one display panel provided by an embodiment of the present application, the wavelength at the peak position of the spectrum of the first sub-pixel is 527±1 nm, and the half-peak width of the spectrum of the green sub-pixel is 32.4±0.5 nm.

[0024] In at least one display panel provided in an embodiment of the present application, the wavelength range at the peak position of the spectrum of the green filter pattern is 520 nm to 535 nm, the starting wavelength range of the spectrum of the green filter pattern is 460 nm to 470 nm, the starting wavelength range of the first wavelength band in the spectrum of the green conversion pattern is 475 nm to 490 nm, the wavelength range of the point where the first wavelength band in the spectrum of the green conversion pattern overlaps with the spectrum of the green filter pattern at the end position is 590 nm to 650 nm, the wavelength range of the end point of the half-maximum width of the spectrum of the green filter pattern is 570 nm to 585 nm, and the wavelength range of the starting point of the half-maximum width of the spectrum of the green filter pattern is 485 nm to 495 nm.

[0025] In at least one display panel provided by an embodiment of the present application, the wavelength at the peak position of the spectrum of the first sub-pixel is 525±1 nm, and the half-peak width of the spectrum of the green sub-pixel is 31.2±0.5 nm.

[0026] In at least one display panel provided in an embodiment of the present application, the wavelength range at the peak position of the spectrum of the green filter pattern is 525 nm to 535 nm, the starting wavelength range of the spectrum of the green filter pattern is 460 nm to 470 nm, the starting wavelength range of the first wavelength band in the spectrum of the green conversion pattern is 475 nm to 485 nm, the wavelength range of the point where the first wavelength band in the spectrum of the green conversion pattern overlaps with the spectrum of the green filter pattern at the end position is 590 nm to 635 nm, the wavelength range of the end point of the half-width of the spectrum of the green filter pattern is 570 nm to 580 nm, and the wavelength range of the starting point of the half-width of the spectrum of the green filter pattern is 485 nm to 495 nm.

[0027] In at least one display panel provided by an embodiment of the present application, the wavelength at the peak position of the spectrum of the first sub-pixel is 523±1 nm, and the half-peak width of the spectrum of the green sub-pixel is 31.0±0.5 nm.

[0028] In at least one display panel provided in an embodiment of the present application, the wavelength range at the peak position of the spectrum of the green filter pattern is 525 nm to 530 nm, the starting wavelength range of the spectrum of the green filter pattern is 460 nm to 465 nm, the starting wavelength range of the first wavelength band in the spectrum of the green conversion pattern is 475 nm to 480 nm, the wavelength range of the point where the first wavelength band in the spectrum of the green conversion pattern overlaps with the spectrum of the green filter pattern at the end position is 590 nm to 620 nm, the wavelength range of the end point of the half-maximum width of the spectrum of the green filter pattern is 570 nm to 580 nm, and the wavelength range of the starting point of the half-maximum width of the spectrum of the green filter pattern is 485 nm to 495 nm.

[0029] In at least one display panel provided by an embodiment of the present application, the wavelength at the peak position of the spectrum of the first sub-pixel is 521±1 nm, and the half-peak width of the spectrum of the green sub-pixel is 30.8±0.5 nm.

[0030] In at least one display panel provided in an embodiment of the present application, the second sub-pixel includes the light-emitting device, the red conversion pattern, and the red filter pattern sequentially arranged on the substrate; the color coordinate value of the second sub-pixel in the first direction is 0.704±0.005, and the color coordinate value of the second sub-pixel in the second direction is 0.294±0.005; the first direction is an X direction in a rectangular coordinate system, and the second direction is a Y direction in the rectangular coordinate system;

[0031] The third sub-pixel includes the light-emitting device, the light-transmitting pattern and the blue filter pattern arranged in sequence on the substrate. The color coordinate value of the third sub-pixel in the first direction is 0.141±0.5, and the color coordinate value of the third sub-pixel in the second direction is 0.046±0.5.

[0032] In a second aspect, an embodiment of the present application provides a display device, which includes the display panel as described in the first aspect.

[0033] The above description is only an overview of the technical solution of the present application. In order to more clearly understand the technical means of the present application, it can be implemented in accordance with the contents of the specification. In order to make the above and other purposes, features and advantages of the present application more obvious and easy to understand, the specific implementation methods of the present application are listed below. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] In order to more clearly illustrate the technical solutions in the embodiments of the present application or related technologies, the following briefly introduces the drawings required for use in the embodiments or descriptions of the prior art. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0035] FIG1 is a schematic diagram of a cross-sectional structure of a display panel provided in an embodiment of the present application;

[0036] FIG2 is an excitation spectrum of a red conversion pattern provided in an embodiment of the present application;

[0037] FIG3 is an excitation spectrum of a green conversion pattern provided in an embodiment of the present application;

[0038] FIG4 is a simplified structural diagram of a display panel provided in an embodiment of the present application;

[0039] FIG5 is a spectrum comparison diagram of a red filter pattern and a red conversion pattern in the related art;

[0040] FIG6 is a superimposed spectrum of the two spectra in FIG5 ;

[0041] FIG7 is a spectrum comparison diagram of a green filter pattern and a green conversion pattern in the related art;

[0042] FIG8 is a superimposed spectrum of the two spectra in FIG7 ;

[0043] FIG9A is a schematic diagram showing a spectral relationship between a green filter pattern and a green conversion pattern according to an embodiment of the present application;

[0044] FIG9B is a spectrum diagram of a blue light-emitting device provided in an embodiment of the present application;

[0045] FIG10A is a spectrum comparison diagram of a green conversion pattern and a first green filter pattern provided in an embodiment of the present application;

[0046] FIG10B is a superimposed spectrum of the two spectra in FIG10A ;

[0047] FIG11A is a spectrum comparison diagram of a green conversion pattern and a second green filter pattern provided in an embodiment of the present application;

[0048] FIG11B is a superimposed spectrum of the two spectra in FIG11A ;

[0049] FIG12A is a spectrum comparison diagram of a green conversion pattern and a third green filter pattern provided in an embodiment of the present application;

[0050] FIG12B is a superimposed spectrum of the two spectra in FIG12A ;

[0051] FIG13A is a spectrum comparison diagram of a green conversion pattern and a fourth green filter pattern provided in an embodiment of the present application;

[0052] FIG13B is a superimposed spectrum of the two spectra in FIG13A;

[0053] FIG14 and FIG15A are two color gamut diagrams provided in embodiments of the present application;

[0054] FIG15B is a partially enlarged schematic diagram of FIG15A . Specific embodiments

[0055] The following will be combined with the drawings in the embodiments of this application to clearly and completely describe the technical solutions in the embodiments of this application. Obviously, the embodiments described are only part of the embodiments of this application, not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of this application.

[0056] In the embodiments of the present application, words such as "first", "second", "third", and "fourth" are used to distinguish between identical or similar items with basically the same functions and effects. This is only for the purpose of clearly describing the technical solutions of the embodiments of the present application, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features.

[0057] In the embodiments of the present application, the terms "upper" and "lower" indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0058] Throughout the specification, terms such as "one embodiment," "some embodiments," "exemplary embodiment," "example," "specific example," or "some examples" are intended to indicate that a particular feature, structure, material, or characteristic associated with that embodiment or example is included in at least one embodiment or example of the present application. Schematic representations of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be included in any one or more embodiments or examples in any suitable manner.

[0059] In the embodiments of the present application, “a plurality of” means two or more, and “at least one” means one or more, unless otherwise clearly defined.

[0060] Unless the context requires otherwise, throughout the specification and claims, the term "comprising" is to be construed in an open, inclusive sense, ie, meaning "including, but not limited to."

[0061] Quantum dots (QDs) have the characteristics of tunable wavelength, narrow half-width, and spectral purity. They are usually excited by blue light and converted into red / green light of corresponding wavelengths, thereby improving the color gamut of the product.

[0062] In the related art, the structure of the quantum dot display panel is shown in FIG1 , and its main structure includes a first substrate SUB1, a plurality of pixel driving circuits located on the first substrate SUB1 (for example, T1, T2, and T3 represent pixel driving circuits of three sub-pixels respectively), an insulating layer INL around the circuit, a pixel definition layer PDL, and light-emitting devices LD1, LD2, and LD3, wherein a plurality of openings are provided on the pixel definition layer PDL, dividing the display panel into a light-emitting area (for example, LA1, LA2, and LA3) and a non-light-emitting area NLA, and the light-emitting area (for example, LA1, LA2, and LA3) is an area where the light-emitting device actually emits light; the light-emitting device includes an anode layer (for example, AE1, AE2, and AE3) electrically connected to the pixel driving circuit, a light-emitting layer OL electrically connected to the anode layer, and a light-emitting layer covering the light-emitting layer. A cathode layer CE on OL, and a first encapsulation layer TFE covering the cathode layer CE, wherein the first encapsulation layer TFE includes three encapsulation sublayers ENL1, ENL2 and ENL3, and the thin film encapsulation layer TFE includes quantum dot color conversion layers CCP1 and CCP2, a transmission pattern layer TP, and a quantum dot retaining wall PW located at the periphery on the side away from the first substrate SUB1, and the second encapsulation layer CAP1 covers the quantum dot color conversion layers CCP1 and CCP2, the transmission pattern layer TP, and the quantum dot retaining wall PW located at the periphery, and a color filter layer is provided on the side of the second encapsulation layer CAP1 away from the first substrate SUB1, wherein the color filter layer includes a first color pattern CF1, a second color pattern CF2, a third color pattern CF3 and a black matrix BM located between two adjacent color patterns.

[0063] Among them, the quantum dot color conversion layers CCP1 and CCP2 are usually excited by a blue backlight light source (for example, by the blue light-emitting devices LD1 and LD2 as shown in Figure 1) and emit red light and green light respectively. The light emitted by the blue light-emitting device LD3 is emitted through the transmission pattern layer TP for display. However, in actual applications, the quantum dot color conversion layer (such as the quantum dot color conversion layers CCP1 and CCP2 shown in Figure 1) cannot completely absorb the blue backlight light source, so that some blue light leakage occurs. For example, Figure 2 provides a spectrum of light emitted after a blue light-emitting device excites a red quantum dot color conversion layer (RQD), and Figure 3 provides a spectrum of light emitted after a blue light-emitting device excites a green quantum dot color conversion layer (GQD). It can be seen from Figures 2 and 3 that blue light leakage occurs at the positions marked with dotted arrows. Generally, the wavelength range of the spectrum of blue visible light is 435nm to 450nm.

[0064] To this end, as shown in FIG4 , a color filter (CF) can be provided on the light-emitting side of the quantum dot color conversion layer to filter out the blue light leakage shown in FIG2 and FIG3 . FIG5 provides a comparison diagram of the spectrum of light emitted after a blue light-emitting device excites a red quantum dot color conversion layer (RQD) and the spectrum of a red filter pattern (RCF). FIG6 provides a superimposed spectrum diagram after a blue light-emitting device excites a red quantum dot color conversion layer (RQD) and a red filter pattern (RCF) is provided on the light-emitting side of the red quantum dot color conversion layer (RQD). FIG7 provides a comparison diagram of the spectrum of light emitted after a blue light-emitting device excites a green quantum dot color conversion layer (GQD) and the spectrum of a green filter pattern (GCF). FIG8 provides a superimposed spectrum diagram after a blue light-emitting device excites a green quantum dot color conversion layer (GQD) and a green filter pattern (GCF) is provided on the light-emitting side of the green quantum dot color conversion layer (GQD).

[0065] 4 to 8 , it can be seen that the red filter pattern (RCF) and the green filter pattern (GCF) can significantly filter out the aforementioned blue light leakage problem, thereby improving the color gamut of the quantum dot display product.

[0066] Based on this, in order to further achieve a high color gamut for quantum dot display products, the color spectrum of each filter pattern in the color filter layer (also known as the filter layer) can be optimized to improve color purity and achieve the requirement for a high color gamut. An embodiment of the present application provides a display panel comprising: a plurality of light-emitting devices arranged in an array on a substrate, a color conversion layer, and a filter layer, wherein the color conversion layer is located on the light-emitting side of the light-emitting device, and the color conversion layer includes a green conversion pattern; the filter layer is located on the side of the color conversion layer away from the light-emitting device; the filter layer includes a green filter pattern, and the orthographic projection of the green filter pattern on the substrate overlaps with the orthographic projection of the green conversion pattern on the substrate; wherein the absolute value of the difference between the wavelength at the peak position of the spectrum of the green filter pattern and the wavelength at the first peak position of the spectrum of the green conversion pattern is less than or equal to 10 nm.

[0067] In this way, by setting the absolute value of the difference between the wavelength at the peak position of the green filter pattern spectrum and the wavelength at the first peak position of the green conversion pattern spectrum to be less than or equal to 10 nm, the wavelength band of green light in the spectrum of the green filter pattern and the wavelength band of green light in the spectrum of the green conversion pattern have a high degree of overlap. As a result, the color purity of the light after the spectrum of the green filter pattern and the spectrum of the green conversion pattern are superimposed is higher (for example, greener), which in turn helps to improve the color gamut of quantum dot display products and meet the design requirements of higher color gamut display products.

[0068] It should be noted that the color gamut can also be called the color space. The color gamut is the range of the number of colors that a display can express. In the real world, the colors of the visible spectrum in nature constitute the largest color gamut space, which contains all the colors visible to the human eye. As shown in Figure 14 or Figure 15A, the CIE International Commission on Illumination has developed a method for describing the color gamut to make it easier for users to understand the color gamut. This is the CIE-xy chromaticity diagram. In this coordinate system, the color gamut range that various display devices can express is represented by the triangle area formed by the lines connecting the three points of RGB (red, green, and blue). The larger the area of ​​the triangle, the larger the color gamut range of the display device.

[0069] The display panel and display device provided in the embodiments of the present application will be specifically introduced and described below with reference to the accompanying drawings and spectra.

[0070] An embodiment of the present application provides a display panel, as shown in FIG4 , which includes:

[0071] A plurality of (e.g., n, where n is a positive integer) light-emitting devices Q arranged in an array on a substrate;

[0072] The color conversion layer QD is located on the light-emitting side of the light-emitting device Q and includes a green conversion pattern GQD;

[0073] The filter layer CF is located on a side of the color conversion layer QD away from the light-emitting device Q. The filter layer CF includes a green filter pattern GCF, and the orthographic projection of the green filter pattern GCF on the substrate overlaps with the orthographic projection of the green conversion pattern GQD on the substrate.

[0074] As shown in FIG. 9A , the absolute value of the difference between the wavelength at the peak position p1 of the spectrum of the green filter pattern GCF and the wavelength at the first peak position p2 of the spectrum of the green conversion pattern GQD is less than or equal to 10 nm.

[0075] In an exemplary embodiment, the above-mentioned display panel can be an OLED (Organic Light Emitting Diode) display panel, a Mini LED (Mini Light Emitting Diode) display panel or a Micro LED (Micro Light Emitting Diode) display panel.

[0076] The type of the light-emitting device Q is not limited here. For example, the light-emitting device Q can be a sub-millimeter light-emitting diode (Mini LED), a micro light-emitting diode (Micro Light Emitting Diode), or an organic light-emitting diode (OLED).

[0077] The embodiments of the present application are described by taking the light-emitting device Q as an OLED and the display panel as an OLED display panel as an example.

[0078] In some examples, the substrate may be made of one or more materials selected from the group consisting of glass, polyimide, polycarbonate, polyacrylate, polyetherimide, and polyethersulfone, and this embodiment includes but is not limited thereto.

[0079] In some examples, the substrate may be a rigid substrate or a flexible substrate.

[0080] When the substrate is a flexible substrate, the substrate may include a single layer of flexible material; or, the substrate may include a first flexible material layer, a first inorganic non-metallic material layer, a second flexible material layer, and a second inorganic non-metallic material layer stacked in sequence. The first flexible material layer and the second flexible material layer are made of polyimide (PI), polyethylene terephthalate (PET), or a surface-treated polymer soft film. The first inorganic non-metallic material layer and the second inorganic non-metallic material layer are made of silicon nitride (SiNx) or silicon oxide (SiOx), etc., to improve the water and oxygen resistance of the substrate. The first inorganic non-metallic material layer and the second inorganic non-metallic material layer are also called barrier layers.

[0081] When the substrate is a rigid substrate, the substrate may include a glass substrate or a silicon material substrate.

[0082] In an exemplary embodiment, the above-mentioned color conversion layer QD refers to a quantum dot color conversion layer, wherein quantum dots are a nano-scale semiconductor. By applying a certain electric field or light pressure to this nano-semiconductor material, they will emit light of a specific frequency, and the frequency of the emitted light will change with the change of the size of the semiconductor. Therefore, by adjusting the size of the nano-semiconductor, the color of the light it emits can be controlled. Since this nano-semiconductor has the property of confining electrons and electron holes, this property is similar to that of atoms or molecules in nature, and therefore it is called a quantum dot.

[0083] In an exemplary embodiment, as the excitation light source of the color conversion layer QD, in order to be able to excite the red conversion pattern RQD to emit red light and excite the green conversion pattern GQD to emit green light, the light-emitting colors of the above-mentioned light-emitting devices Q are uniform and all emit blue light, that is, the light-emitting devices Q are all blue light-emitting devices.

[0084] The specific color coordinates of the light source emitted by the above-mentioned blue light-emitting device are not limited here. For example, as shown in Figure 9B, a spectrum diagram of a blue light-emitting device is provided; wherein the peak of the spectrum of the blue light-emitting device ranges from 450nm to 460nm, and its full width at half maximum (FWHM) ranges from 16nm to 25nm.

[0085] Exemplarily, the green conversion pattern GQD can adopt a chromium-free (Cd-free) material system. For example, under this material system, as shown in Figures 10A, 11A, 12A and 13A, the green conversion pattern GQD emits green light with a peak range of 520nm to 550nm and a half-peak width range of 35nm to 50nm under the excitation of blue light.

[0086] In an exemplary embodiment, the filter layer CF is also called a color filter layer, and may include filter patterns of different colors, such as a green filter pattern GCF.

[0087] Among them, the overlap of the orthographic projection of the green filter pattern GCF on the substrate and the orthographic projection of the green conversion pattern GQD on the substrate includes that the orthographic projection of the green filter pattern GCF on the substrate covers the orthographic projection of the green conversion pattern GQD on the substrate; in other words, the area of ​​the orthographic projection of the green filter pattern GCF on the substrate is greater than or equal to the area of ​​the orthographic projection of the green conversion pattern GQD on the substrate.

[0088] As shown in FIG9A , the peak position of the spectrum of the green filter pattern GCF is marked as p1, and the first peak position of the spectrum of the green conversion pattern GQD is marked as p2; the wavelengths at positions p1 and p2 satisfy the following relationship:

[0089] |p1(λ)-p2(λ)|≤10nm;

[0090] Illustratively, p2(λ)-10 nm≤p1(λ)≤10 nm+p2(λ).

[0091] For example, 520 nm ≤ p1(λ) ≤ 540 nm.

[0092] Here, p1(λ) represents the wavelength at position p1, and p2(λ) represents the wavelength at position p2. It should be noted that the spectrum of the green conversion pattern GQD is emitted under the excitation of blue light from the blue light-emitting device. Therefore, the spectrum of the green conversion pattern GQD includes the blue light band where light leakage occurs and the green light band generated by excitation. The first peak of the spectrum of the green conversion pattern GQD refers to the peak of the green light band generated by excitation.

[0093] Exemplarily, p2(λ)-10 nm≤p1(λ)≤5 nm+p2(λ), for example, 520 nm≤p1(λ)≤535 nm.

[0094] Exemplarily, p2(λ)-5nm≤p1(λ)≤5nm+p2(λ), for example, 525nm≤p1(λ)≤535nm.

[0095] Exemplarily, p2(λ)-5nm≤p1(λ)≤p2(λ), for example, 525nm≤p1(λ)≤530nm.

[0096] In the display panel provided in the embodiments of the present application, the absolute value of the difference between the wavelength at the peak position p1 of the spectrum of the green filter pattern GCF and the wavelength at the first peak position p2 of the spectrum of the green conversion pattern GQD is set to be less than or equal to 10 nm. This ensures a high degree of overlap between the wavelength band of green light in the spectrum of the green filter pattern GCF and the wavelength band of green light in the spectrum of the green conversion pattern GQD. As a result, the light resulting from the superposition of the spectrum of the green filter pattern GCF and the spectrum of the green conversion pattern GQD (such as shown in the spectra in Figures 10B, 11B, 12B, and 13B) has a higher color purity (e.g., a greener color). This helps improve the color gamut of quantum dot display products and meets the design requirements of display products with a higher color gamut.

[0097] In at least one display panel provided in an embodiment of the present application, as shown in FIG9A , the half-width fm1 of the spectrum of the green filter pattern GCF (the width between points f3 and f4) is greater than or equal to 1.5 times the first half-width fm2 of the spectrum of the green conversion pattern GQD (the width between points f1 and f2), and less than or equal to 3 times the first half-width fm2 of the spectrum of the green conversion pattern GQD (the width between points f1 and f2).

[0098] Exemplarily, the spectrum of the green conversion pattern GQD is emitted under the excitation of the blue light emitted by the blue light-emitting device. Therefore, the spectrum of the green conversion pattern GQD includes the blue light band where light leakage occurs and the green light band generated by the excitation. The first half-maximum width fm2 of the spectrum of the above-mentioned green conversion pattern GQD refers to the half-maximum width of the green light band.

[0099] Exemplarily, the half-maximum width fm1 of the spectrum of the green filter pattern GCF satisfies the following relationship:

[0100] 1.5fm2≤fm1≤3fm2;

[0101] For example, the half-maximum width fm1 of the spectrum of the green filter pattern GCF may also satisfy the following relationship:

[0102] 1.6fm2≤fm1≤2.7fm2, for example, 50nm≤fm1≤80nm.

[0103] Alternatively, 1.8fm2≤fm1≤2.5fm2; for example, 55nm≤fm1≤75nm.

[0104] Alternatively, 2.0fm2≤fm1≤2.4fm2; for example, 60nm≤fm1≤70nm.

[0105] Alternatively, 2.0fm2≤fm1≤2.2fm2; for example, 60nm≤fm1≤65nm.

[0106] In this way, when the spectrum of the green filter pattern GCF and the spectrum of the green conversion pattern GQD are superimposed, the distance between the starting point and the ending point of the green light band in the superimposed spectrum (for example, Figures 10B, 11B, 12B, and 13B) can be greatly reduced, thereby narrowing the peak width of the superimposed spectrum. As a result, the light after the spectrum of the green filter pattern GCF and the spectrum of the green conversion pattern GQD are superimposed (for example, as shown in the spectra in Figures 10B, 11B, 12B, and 13B) has a higher color purity (for example, a greener color). This is beneficial for improving the color gamut of quantum dot display products and meeting the design requirements of display products with a higher color gamut.

[0107] In at least one display panel provided in an embodiment of the present application, the light emitting colors of the multiple light emitting devices Q are all blue; the spectrum of the green conversion pattern GQD includes a first wavelength band (e.g., 490 nm to 600 nm) and a second wavelength band (e.g., 430 nm to 490 nm), the first wavelength band is a green light wavelength band, and the second wavelength band is a blue light wavelength band; the wavelength of the second wavelength band is smaller than the wavelength of the first wavelength band;

[0108] The first peak and the first half-peak width are the peak and half-peak width of the first band respectively;

[0109] As shown in FIG9A , the wavelength of the starting point f4 at the half-width position of the spectrum of the green filter pattern GCF is greater than or equal to the wavelength of the starting point f2 at the first half-width position of the spectrum of the green conversion pattern GQD minus 25 nm, and the wavelength of the starting point f4 at the half-width position of the spectrum of the green filter pattern GCF is less than or equal to the wavelength of the starting point f2 at the first half-width position of the spectrum of the green conversion pattern GQD minus 5 nm.

[0110] In an exemplary embodiment, the wavelength of the starting point f4 at the half-maximum width position of the spectrum of the color filter pattern GCF and the wavelength of the starting point f2 at the first half-maximum width position of the spectrum of the green conversion pattern GQD satisfy the following relationship:

[0111] f4(λ)≥f2(λ)-25nm, and f4(λ)≤f2(λ)-5nm;

[0112] It can also be written as: f2(λ)-25nm≤f4(λ)≤f2(λ)-5nm;

[0113] f4(λ) is the wavelength of the green filter pattern GCF spectrum starting at point f4 at half maximum width, and f2(λ) is the wavelength of the green conversion pattern GQD spectrum starting at point f2 at first half maximum width.

[0114] For example, the wavelength of the starting point f4 at the half-maximum width position of the spectrum of the color filter pattern GCF and the wavelength of the starting point f2 at the first half-maximum width position of the spectrum of the green conversion pattern GQD may also satisfy the following relationship:

[0115] f2(λ)-20nm≤f4(λ)≤f2(λ)-5nm; for example, 480nm≤f4(λ)≤495nm.

[0116] Alternatively, f2(λ)-15nm≤f4(λ)≤f2(λ)-5nm; for example, 485nm≤f4(λ)≤495nm.

[0117] In this way, when the spectrum of the green filter pattern GCF and the spectrum of the green conversion pattern GQD are superimposed, the half-peak width in the superimposed spectrum (for example, Figures 10B, 11B, 12B, and 13B) can be greatly reduced, so that the light after the spectrum of the green filter pattern GCF and the spectrum of the green conversion pattern GQD are superimposed (for example, as shown in the spectra in Figures 10B, 11B, 12B, and 13B) has higher color purity (for example, greener), which is beneficial to improving the color gamut of quantum dot display products and meeting the design requirements of display products with higher color gamuts.

[0118] In a display panel provided by an embodiment of the present application, as shown in FIG9A , the wavelength of the end point f3 at the half-maximum width position of the spectrum of the green filter pattern GCF is greater than or equal to the wavelength of the end point f1 at the first half-maximum width position of the spectrum of the green conversion pattern GQD plus 10 nm, and the wavelength of the end point f3 at the half-maximum width position of the spectrum of the green filter pattern GCF is less than or equal to the wavelength of the end point f1 at the first half-maximum width position of the spectrum of the green conversion pattern GQD plus 35 nm.

[0119] In an exemplary embodiment, the wavelength of the end point f3 at the half-maximum width position of the spectrum of the green filter pattern GCF and the wavelength of the end point f1 at the first half-maximum width position of the spectrum of the green conversion pattern GQD satisfy the following relationship:

[0120] f1(λ)+10nm≤f3(λ)≤f1(λ)+35nm;

[0121] f1(λ) is the wavelength of the first half-maximum width of the spectrum of the green conversion pattern GQD, and f3(λ) is the wavelength of the half-maximum width of the spectrum of the green filter pattern GCF, and the end point f3.

[0122] Exemplarily, f1(λ)+10nm≤f3(λ)≤f1(λ)+30nm; for example, 570nm≤f3(λ)≤590nm.

[0123] Alternatively, f1(λ)+10nm≤f3(λ)≤f1(λ)+25nm; for example, 570nm≤f3(λ)≤585nm.

[0124] Alternatively, f1(λ)+10 nm≤f3(λ)≤f1(λ)+20 nm; for example, 570 nm≤f3(λ)≤580 nm.

[0125] Thus, by setting f1(λ)+10nm≤f3(λ)≤f1(λ)+35nm, when the spectrum of the green filter pattern GCF and the spectrum of the green conversion pattern GQD are superimposed, the half-value width of the superimposed spectrum (for example, in Figures 10B, 11B, 12B, and 13B) can be greatly reduced. As a result, the color purity of the light after the spectrum of the green filter pattern GCF and the spectrum of the green conversion pattern GQD are superimposed (for example, as shown in the spectra in Figures 10B, 11B, 12B, and 13B) is higher (for example, greener), which is beneficial for improving the color gamut of quantum dot display products and meeting the design requirements of display products with a higher color gamut.

[0126] In at least one display panel provided in an embodiment of the present application, as shown in FIG9A , the half-width at half-maximum of the second band of the spectrum of the green conversion pattern GQD is the second half-width at half-maximum fm3; the starting wavelength (the wavelength at position p4) of the spectrum of the green filter pattern GCF is greater than or equal to the starting wavelength (the wavelength at position p3) of the second band, and is less than or equal to the sum of the starting wavelength (the wavelength at position p3) of the second band and 3 / 4 times the second half-width at half-maximum fm3.

[0127] In an exemplary embodiment, the half-maximum width of the second wavelength band of the spectrum of the green conversion pattern GQD is the second half-maximum width fm3, the starting wavelength of the spectrum of the green filter pattern GCF (the wavelength at position p4) and the starting wavelength of the second wavelength band (the wavelength at position p3) may satisfy the following relationship:

[0128] p3(λ)≤p4(λ)≤p3(λ)+fm3*3 / 4;

[0129] Wherein, p3(λ) is the starting wavelength of the second wavelength band, and p4(λ) is the starting wavelength of the spectrum of the green filter pattern GCF.

[0130] Exemplarily, the half-maximum width of the second band of the spectrum of the green conversion pattern GQD is the second half-maximum width fm3, and the starting wavelength of the spectrum of the green filter pattern GCF (the wavelength at position p4) and the starting wavelength of the second band (the wavelength at position p3) may also satisfy the following relationship:

[0131] p3(λ)≤p4(λ)≤p3(λ)+fm3*2 / 4; for example, 460nm≤p4(λ)≤470nm;

[0132] Alternatively, p3(λ)≤p4(λ)≤p3(λ)+fm3*1 / 4; for example, 460nm≤p4(λ)≤465nm.

[0133] Thus, by setting p3(λ)≤p4(λ)≤p3(λ)+fm3*3 / 4, when the spectrum of the green filter pattern GCF and the spectrum of the green conversion pattern GQD are superimposed, the half-value width of the superimposed spectrum (for example, in Figures 10B, 11B, 12B, and 13B) can be greatly reduced. As a result, the color purity of the light after the spectrum of the green filter pattern GCF and the spectrum of the green conversion pattern GQD are superimposed (for example, as shown in the spectra in Figures 10B, 11B, 12B, and 13B) is higher (for example, greener), which is beneficial for improving the color gamut of quantum dot display products and meeting the design requirements of display products with a higher color gamut.

[0134] In at least one display panel provided in an embodiment of the present application, as shown in FIG9A , the starting wavelength of the first band in the spectrum of the green conversion pattern GQD (the wavelength at position p5) is greater than or equal to the sum of the starting wavelength of the second band (the wavelength at position p3) and 3 / 4 times the second half-width fm3, and is less than or equal to the sum of the starting wavelength of the second band (the wavelength at position p3) and 3 / 2 times the second half-width fm3.

[0135] In an exemplary embodiment, the half-maximum width of the second wavelength band of the spectrum of the green conversion pattern GQD is the second half-maximum width fm3, and the starting wavelength of the first wavelength band (the wavelength at position p5) and the starting wavelength of the second wavelength band (the wavelength at position p3) in the spectrum of the green conversion pattern GQD may satisfy the following relationship:

[0136] p3(λ)+fm3*3 / 4≤p5(λ)≤p3(λ)+fm3*3 / 2; for example, 475nm≤p5(λ)≤490nm.

[0137] Wherein, p3(λ) is the starting wavelength of the second wavelength band in the spectrum of the green conversion pattern GQD, and p5(λ) is the starting wavelength of the first wavelength band in the spectrum of the green conversion pattern GQD.

[0138] Exemplarily, the half-maximum width of the second band of the spectrum of the green conversion pattern GQD is the second half-maximum width fm3, and the starting wavelength of the first band (the wavelength at the position p5) and the starting wavelength of the second band (the wavelength at the position p3) in the spectrum of the green conversion pattern GQD satisfy the following relationship:

[0139] p3(λ)+fm3*3 / 4≤p5(λ)≤p3(λ)+fm3*5 / 4; for example, 475nm≤p5(λ)≤485nm.

[0140] Alternatively, p3(λ)+fm3*3 / 4≤p5(λ)≤p3(λ)+fm3; for example, 475nm≤p5(λ)≤480nm.

[0141] In the embodiment of the present application, by setting p3(λ)+fm3*3 / 4≤p5(λ)≤p3(λ)+fm3*3 / 2, when the spectrum of the green filter pattern GCF and the spectrum of the green conversion pattern GQD are superimposed, the half-peak width in the superimposed spectrum (for example, Figures 10B, 11B, 12B, and 13B) can be greatly reduced, so that the light after the spectrum of the green filter pattern GCF and the spectrum of the green conversion pattern GQD are superimposed (for example, as shown in the spectra in Figures 10B, 11B, 12B, and 13B) has higher color purity (for example, greener), which is beneficial to improving the color gamut of quantum dot display products and meeting the design requirements of display products with higher color gamut.

[0142] In at least one display panel provided in an embodiment of the present application, as shown in FIG9A , the wavelength of the first wavelength band in the spectrum of the green conversion pattern GQD at the end position where it overlaps with the spectrum of the green filter pattern GCF (at position p6) is greater than or equal to the sum of the wavelength at the first peak position (at position p2) of the spectrum of the green conversion pattern GQD and twice the first half-width fm2 of the spectrum of the green conversion pattern GQD, and is less than or equal to the sum of the wavelength at the first peak position (at position p2) of the spectrum of the green conversion pattern GQD and five times the first half-width fm2.

[0143] In an exemplary embodiment, the wavelength of the first wavelength band in the spectrum of the green conversion pattern GQD at the end position where it overlaps with the spectrum of the green filter pattern GCF (at position p6), the wavelength at the first peak position (at position p2) of the spectrum of the green conversion pattern GQD, and the first half-maximum width fm2 of the spectrum of the green conversion pattern GQD may satisfy the following relationship:

[0144] p2(λ)+2*fm2≤p6(λ)≤p2(λ)+5*fm2;

[0145] Here, p2(λ) is the wavelength at the first peak position (at position p2) of the spectrum of the green conversion pattern GQD, and fm2 is the first half-maximum width of the spectrum of the green conversion pattern GQD.

[0146] Illustratively, p2(λ)+3*fm2≤p6(λ)≤p2(λ)+5*fm2; for example, 620nm≤p6(λ)≤680nm.

[0147] Illustratively, p2(λ)+2*fm2≤p6(λ)≤p2(λ)+4*fm2; for example, 590nm≤p6(λ)≤650nm.

[0148] Illustratively, p2(λ)+2*fm2≤p6(λ)≤p2(λ)+fm2*7 / 2; for example, 590nm≤p6(λ)≤635nm.

[0149] Illustratively, p2(λ)+2*fm2≤p6(λ)≤p2(λ)+fm2*3; for example, 590nm≤p6(λ)≤620nm.

[0150] In the embodiment of the present application, by setting p2(λ)+2*fm2≤p6(λ)≤p2(λ)+5*fm2, when the spectrum of the green filter pattern GCF and the spectrum of the green conversion pattern GQD are superimposed, the half-value width in the superimposed spectrum (for example, Figures 10B, 11B, 12B, and 13B) can be greatly reduced. As a result, the light after the spectrum of the green filter pattern GCF and the spectrum of the green conversion pattern GQD are superimposed (for example, as shown in the spectra in Figures 10B, 11B, 12B, and 13B) has higher color purity (for example, greener), which is beneficial for improving the color gamut of quantum dot display products and meeting the design requirements of display products with higher color gamuts.

[0151] In at least one display panel provided in an embodiment of the present application, a first sub-pixel, a second sub-pixel, and a third sub-pixel of the display panel are provided; the first sub-pixel includes a light-emitting device Q, a green conversion pattern GQD, and a green filter pattern GCF sequentially arranged on a substrate;

[0152] Among them, the wavelength range of the first peak position (at position p2) of the spectrum of the green conversion pattern GQD is 520nm~550nm, the starting wavelength of the second peak of the spectrum of the green conversion pattern GQD (the wavelength at position p3) is in the range of 450nm~460nm, the wavelength range of the starting point (at position f2) of the first half-maximum width position of the spectrum of the green conversion pattern GQD is 495nm~530nm, and the wavelength range of the ending point (at position f1) of the first half-maximum width position of the spectrum of the green conversion pattern is 535nm~570nm.

[0153] For example, the wavelength at the first peak position (at position p2) of the spectrum of the green conversion pattern GQD may be 525 nm, 528 nm, 530 nm, 535 nm, 538 nm, 540 nm, 545 nm, or 548 nm.

[0154] For example, the starting wavelength of the second peak of the spectrum of the green conversion pattern GQD (the wavelength at position p3) may be 453 nm, 455 nm, or 458 nm.

[0155] For example, the wavelength of the starting point at the first half-maximum width position (at position f2) of the spectrum of the green conversion pattern GQD may be 496 nm, 498 nm, 500 nm, 505 nm, 510 nm, 515 nm, 520 nm, 523 nm, 525 nm, or 528 nm.

[0156] Exemplarily, the wavelength of the end point (at position f1) at the first half-maximum width position of the spectrum of the green conversion pattern GQD can be 535nm, 538nm, 540nm, 545nm, 548nm, 550nm, 553nm, 555nm, 558nm, 560nm, 565nm or 568nm.

[0157] The following provides examples of spectral parameters of four green filter patterns:

[0158] Table 1: Spectral parameters of four green filter patterns combined with green conversion patterns

[0159] In at least one display panel provided in an embodiment of the present application, as shown in Table 1, FIG9A , and FIG10A , the wavelength range of the peak position (at position p1) of the spectrum of the green filter pattern GCF is 520 nm to 540 nm, the starting wavelength (at position p4) of the spectrum of the green filter pattern GCF is 460 nm to 470 nm, the starting wavelength (at position p5) of the first wavelength band in the spectrum of the green conversion pattern GQD is 475 nm to 490 nm, the wavelength range of the point (at position p6) at which the first wavelength band in the spectrum of the green conversion pattern GQD overlaps with the spectrum of the green filter pattern GCF at the ending position of the spectrum of the green filter pattern GCF is 620 nm to 680 nm, the wavelength range of the ending point (at position f3) of the half-width of the spectrum of the green filter pattern GCF is 570 nm to 590 nm, and the wavelength range of the starting point (at position f4) of the half-width of the spectrum of the green filter pattern GCF is 480 nm to 495 nm.

[0160] For example, the wavelength at the peak position (position p1) of the spectrum of the green filter pattern GCF may be 520 nm, 523 nm, 525 nm, 528 nm, 530 nm, 533 nm, 535 nm, or 538 nm.

[0161] For example, the starting wavelength of the spectrum of the green filter pattern GCF (the wavelength at position p4) may be 463 nm, 465 nm, 468 nm, or 470 nm.

[0162] For example, the starting wavelength of the first wavelength band in the spectrum of the green conversion pattern GQD (the wavelength at position p5) may be 478 nm, 480 nm, 483 nm, 485 nm, or 488 nm.

[0163] Exemplarily, the wavelength of the first band in the spectrum of the green conversion pattern GQD at the end position where it overlaps with the spectrum of the green filter pattern GCF (at position p6) can be 625nm, 630nm, 635nm, 640nm, 645nm, 650nm, 655nm, 660nm, 665nm, 670nm or 675nm.

[0164] For example, the wavelength of the end point (at position f3) of the half-maximum width of the spectrum of the green filter pattern GCF may be 573 nm, 575 nm, 578 nm, 580 nm, 583 nm, 585 nm, or 588 nm.

[0165] For example, the wavelength of the starting point (at position f4) of the half-maximum width of the spectrum of the green filter pattern GCF may be 483 nm, 485 nm, 488 nm, 490 nm, or 493 nm.

[0166] In at least one display panel provided in an embodiment of the present application, a second sub-pixel includes a light-emitting device Q, a red conversion pattern RQD, and a red filter pattern RCF sequentially arranged on a substrate; a color coordinate value of the second sub-pixel in a first direction is 0.704±0.005, and a color coordinate value of the second sub-pixel in a second direction is 0.294±0.005; the first direction is an X direction in a rectangular coordinate system, and the second direction is a Y direction in the rectangular coordinate system;

[0167] The third sub-pixel includes a light-emitting device Q, a light-transmitting pattern TP and a blue filter pattern BCF arranged in sequence on the substrate. The color coordinate value of the third sub-pixel in the first direction is 0.141±0.5, and the color coordinate value of the third sub-pixel in the second direction is 0.046±0.5.

[0168] Exemplarily, the color coordinate value of the second sub-pixel in the first direction is 0.704±0.003, and the color coordinate value of the second sub-pixel in the second direction is 0.294±0.003.

[0169] Exemplarily, the color coordinate value of the third sub-pixel in the first direction is 0.141±0.3, and the color coordinate value of the third sub-pixel in the second direction is 0.046±0.3.

[0170] At least one display panel provided in an embodiment of the present application, as shown in FIG10B , provides a spectrum diagram of the first sub-pixel after the green conversion pattern GQD and the first green filter pattern GCF1 are superimposed, wherein the wavelength at the peak position is 527±1 nm and the half-peak width is 32.4±0.5 nm.

[0171] Exemplarily, the first sub-pixel is a green sub-pixel (G), and the CIExy color coordinates of the first sub-pixel are as shown in Table 2.

[0172] In the spectrum diagram shown in Figure 10B, the color gamut results of the display panel can be obtained by combining the red sub-pixels and blue sub-pixels in the related art. Compared with the color gamut results of the display panel in Table 3, it can be seen that the color gamut of the embodiment of the present application is improved from 84% to 86.3% (BT2020 color gamut @ 1931), and from 92% to 93.1% (BT2020 color gamut @ 1976). Among them, BT2020 color gamut @ 1931 and BT2020 color gamut @ 1976 are two different color gamut standards. For details, please refer to the introduction in the related art.

[0173] It should be noted that BT2020, DCI-P3, and NTSC are three standards for color gamut. Among them, BT2020 covers the widest area in the color space, followed by NTSC, and DCI-P3 the smallest. In other words, the BT2020 standard has the largest color gamut, the DCI-P3 standard has the second largest color gamut, and the NTSC standard has the smallest color gamut. For specific content related to color gamut standards, please refer to the relevant technology and will not be repeated here.

[0174] Table 2: CIEx, CIEy, and color gamut results of each sub-pixel after the green conversion pattern and the first green filter pattern are superimposed

[0175] Table 3: CIEx, CIEy and color gamut results of each sub-pixel after the green conversion pattern and the green filter pattern in the related art are superimposed

[0176] Table 4: Influence of CIEx and CIEy on color gamut size

[0177] It should be noted that, as shown in Table 4, Figures 15A and 15B, the larger the CIEx of the red sub-pixel and the smaller the CIEy, the smaller the CIEx of the green sub-pixel and the larger the CIEy, and the smaller the CIEx of the blue sub-pixel and the smaller the CIEy, the larger the color gamut of the display panel. Figure 15B is a partially enlarged schematic diagram of Figure 15A. Figures 14 and 15A are both color gamut diagrams (also known as horseshoe diagrams). In Figure 14, the corresponding colors at different wavelengths are marked. For details, please refer to the relevant technology. In Figure 15A, arrows are used to mark the optimization directions of CIEx and CIEy of the green filter pattern in the display panel provided in the embodiment of the present application.

[0178] In at least one display panel provided in an embodiment of the present application, as shown in Table 1, FIG9A , and FIG11A , the wavelength range of the peak position (at position p1) of the spectrum of the green filter pattern GCF is 520 nm to 535 nm, the starting wavelength (at position p4) of the spectrum of the green filter pattern GCF is 460 nm to 470 nm, the starting wavelength (at position p5) of the first wavelength band in the spectrum of the green conversion pattern GQD is 475 nm to 490 nm, the wavelength range of the point (at position p6) at which the first wavelength band in the spectrum of the green conversion pattern GQD overlaps with the spectrum of the green filter pattern GCF at the ending position of the spectrum of the green filter pattern GCF is 590 nm to 650 nm, the wavelength range of the ending point (at position f3) of the half-width of the spectrum of the green filter pattern GCF is 570 nm to 585 nm, and the wavelength range of the starting point (at position f4) of the half-width of the spectrum of the green filter pattern GCF is 485 nm to 495 nm.

[0179] For example, the wavelength at the peak position (at position p1 ) of the spectrum of the green filter pattern GCF may be 520 nm, 523 nm, 525 nm, 528 nm, 530 nm, 533 nm, or 535 nm.

[0180] For example, the starting wavelength of the spectrum of the green filter pattern GCF (the wavelength at position p4) may be 463 nm, 465 nm, 468 nm, or 470 nm.

[0181] For example, the starting wavelength of the first wavelength band in the spectrum of the green conversion pattern GQD (the wavelength at position p5) may be 478 nm, 480 nm, 483 nm, 485 nm, or 488 nm.

[0182] For example, the wavelength of the first wavelength band in the spectrum of the green conversion pattern GQD at the end position and the overlapping point (at position p6) of the spectrum of the green filter pattern GCF can be 595nm, 600nm, 605nm, 610nm, 615nm, 620nm, 625nm, 630nm, 635nm, 640nm, 645nm or 650nm.

[0183] For example, the wavelength of the end point (at position f3) of the half-maximum width of the spectrum of the green filter pattern GCF may be 573 nm, 575 nm, 578 nm, 580 nm, 583 nm, or 585 nm.

[0184] For example, the wavelength of the starting point (at position f4) of the half-maximum width of the spectrum of the green filter pattern GCF may be 483 nm, 485 nm, 488 nm, 490 nm, or 493 nm.

[0185] At least one display panel provided in an embodiment of the present application, as shown in FIG11B , provides a spectrum diagram of the first sub-pixel after the green conversion pattern GQD and the second green filter pattern GCF2 are superimposed, wherein the wavelength at the peak position is 525±1 nm, and the half-peak width of the spectrum of the green sub-pixel is 31.2±0.5 nm.

[0186] Exemplarily, the first sub-pixel is a green sub-pixel (G), and the CIExy color coordinates of the first sub-pixel are as shown in Table 5.

[0187] In the spectrum diagram shown in Figure 11B, the color gamut results of the display panel can be obtained by combining the red sub-pixel and the blue sub-pixel in the related technology. Compared with the color gamut results of the display panel in Table 3, as shown in Table 5, it can be seen that the color gamut of the embodiment of the present application is improved from 84% to 87.5% (BT2020 color gamut @1931) and from 92% to 93.8% (BT2020 color gamut @1976).

[0188] Table 5: CIEx, CIEy, and color gamut results for each sub-pixel after the green conversion pattern and the second green filter pattern are superimposed

[0189] In at least one display panel provided in an embodiment of the present application, as shown in Table 1, FIG9A , and FIG12A , the wavelength range of the peak position (at position p1) of the spectrum of the green filter pattern GCF is 525 nm to 535 nm, the starting wavelength (at position p4) of the spectrum of the green filter pattern GCF is 460 nm to 470 nm, the starting wavelength (at position p5) of the first wavelength band in the spectrum of the green conversion pattern GQD is 475 nm to 485 nm, the wavelength range of the point (at position p6) at which the first wavelength band in the spectrum of the green conversion pattern GQD overlaps with the spectrum of the green filter pattern GCF at the ending position of the spectrum of the green filter pattern GCF is 590 nm to 635 nm, the wavelength range of the ending point (at position f3) of the half-width of the spectrum of the green filter pattern GCF is 570 nm to 580 nm, and the wavelength range of the starting point (at position f4) of the half-width of the spectrum of the green filter pattern GCF is 485 nm to 495 nm.

[0190] For example, the wavelength at the peak position (at position p1 ) of the spectrum of the green filter pattern GCF may be 520 nm, 523 nm, 525 nm, 528 nm, 530 nm, 533 nm, or 535 nm.

[0191] For example, the starting wavelength of the spectrum of the green filter pattern GCF (the wavelength at position p4) may be 463 nm, 465 nm, 468 nm, or 470 nm.

[0192] For example, the starting wavelength of the first wavelength band in the spectrum of the green conversion pattern GQD (the wavelength at position p5) may be 478 nm, 480 nm, 483 nm, or 485 nm.

[0193] For example, the wavelength of the first wavelength band in the spectrum of the green conversion pattern GQD at the end position and the overlapping point (at position p6) of the spectrum of the green filter pattern GCF can be 595nm, 600nm, 605nm, 610nm, 615nm, 620nm, 625nm, 630nm or 635nm.

[0194] For example, the wavelength of the end point (at position f3) of the half-maximum width of the spectrum of the green filter pattern GCF may be 573 nm, 575 nm, 578 nm, or 580 nm.

[0195] For example, the wavelength of the starting point (at position f4) of the half-maximum width of the spectrum of the green filter pattern GCF may be 485 nm, 488 nm, 490 nm, or 493 nm.

[0196] At least one display panel provided in an embodiment of the present application, as shown in Figure 12B, provides a spectrum diagram of the first sub-pixel after the green conversion pattern GQD and the third green filter pattern GCF3 are superimposed, wherein the wavelength at the peak position is 523±1nm, and the half-peak width of the spectrum of the green sub-pixel is 31.0±0.5nm.

[0197] Exemplarily, the first sub-pixel is a green sub-pixel (G), and the CIExy color coordinates of the first sub-pixel are as shown in Table 6.

[0198] In the spectrum diagram shown in Figure 12B, the color gamut results of the display panel can be obtained by combining the red sub-pixel and the blue sub-pixel in the related technology. Compared with the color gamut results of the display panel in Table 3, as shown in Table 6, it can be seen that the color gamut of the embodiment of the present application is improved from 84% to 88.8% (BT2020 color gamut @1931) and from 92% to 94.5% (BT2020 color gamut @1976).

[0199] Table 6: CIEx, CIEy, and color gamut results of each sub-pixel after the green conversion pattern and the third green filter pattern are superimposed

[0200] In at least one display panel provided in an embodiment of the present application, as shown in Table 1, FIG9A , and FIG13A , the wavelength range of the peak position (at position p1) of the spectrum of the green filter pattern GCF is 525 nm to 530 nm, the starting wavelength (at position p4) of the spectrum of the green filter pattern GCF is 460 nm to 465 nm, the starting wavelength (at position p5) of the first wavelength band in the spectrum of the green conversion pattern GQD is 475 nm to 480 nm, the wavelength range of the point (at position p6) at which the first wavelength band in the spectrum of the green conversion pattern GQD overlaps with the spectrum of the green filter pattern GCF at the end position of the spectrum of the green filter pattern GCF is 590 nm to 620 nm, the wavelength range of the end point (at position f3) of the half-width of the spectrum of the green filter pattern GCF is 570 nm to 580 nm, and the wavelength range of the starting point (at position f4) of the half-width of the spectrum of the green filter pattern GCF is 485 nm to 495 nm.

[0201] For example, the wavelength at the peak position (at position p1 ) of the spectrum of the green filter pattern GCF may be 526 nm, 527 nm, 528 nm, 529 nm, or 530 nm.

[0202] For example, the starting wavelength of the spectrum of the green filter pattern GCF (the wavelength at position p4) may be 462 nm, 463 nm, 464 nm, or 465 nm.

[0203] For example, the starting wavelength of the first wavelength band in the spectrum of the green conversion pattern GQD (the wavelength at position p5) may be 476 nm, 477 nm, 478 nm, 479 nm, or 480 nm.

[0204] For example, the wavelength of the first wavelength band in the spectrum of the green conversion pattern GQD at the end position where it overlaps with the spectrum of the green filter pattern GCF (at position p6) may be 595 nm, 600 nm, 605 nm, 610 nm, 615 nm or 620 nm.

[0205] For example, the wavelength of the end point (at position f3) of the half-maximum width of the spectrum of the green filter pattern GCF may be 573 nm, 575 nm, 578 nm, or 580 nm.

[0206] For example, the wavelength of the starting point (at position f4) of the half-maximum width of the spectrum of the green filter pattern GCF may be 485 nm, 488 nm, 490 nm, or 493 nm.

[0207] At least one display panel provided in an embodiment of the present application, as shown in Figure 13B, provides a spectrum diagram of the first sub-pixel after the green conversion pattern GQD and the fourth green filter pattern GCF4 are superimposed, wherein the wavelength at the peak position is 521±1nm, and the half-peak width of the spectrum of the green sub-pixel is 30.8±0.5nm.

[0208] Exemplarily, the first sub-pixel is a green sub-pixel (G), and the CIExy color coordinates of the first sub-pixel are as shown in Table 7.

[0209] In the spectrum diagram shown in Figure 13B, the color gamut results of the display panel can be obtained by combining the red sub-pixel and the blue sub-pixel in the related technology. Compared with the color gamut results of the display panel in Table 3, as shown in Table 7, it can be seen that the color gamut of the embodiment of the present application is improved from 84% to 90.0% (BT2020 color gamut @1931) and from 92% to 95.2% (BT2020 color gamut @1976).

[0210] Table 7: CIEx, CIEy, and color gamut results of each sub-pixel after the green conversion pattern and the fourth green filter pattern are superimposed

[0211] An embodiment of the present application provides a display device, comprising the display panel as described above.

[0212] The specific structure of the display panel can be referred to in the previous description and will not be repeated here.

[0213] The above-mentioned display device can be an OLED (Organic Light Emitting Diode) display device, a Mini LED (Mini Light Emitting Diode) display device or a Micro LED (Micro Light Emitting Diode) display device.

[0214] The above-mentioned display device can be a display device such as OLED / Mini LED / Micro LED screen display, as well as any product or component with display function such as television, digital camera, mobile phone, tablet computer, etc. that includes these display devices.

[0215] In the display device provided in the embodiments of the present application, by setting the absolute value of the difference between the wavelength at the peak position p1 of the spectrum of the green filter pattern GCF and the wavelength at the first peak position p2 of the spectrum of the green conversion pattern GQD to be less than or equal to 10 nm, the wavelength band of green light in the spectrum of the green filter pattern GCF and the wavelength band of green light in the spectrum of the green conversion pattern GQD have a high degree of overlap. As a result, the light resulting from the superposition of the spectrum of the green filter pattern GCF and the spectrum of the green conversion pattern GQD (such as shown in the spectra of Figures 10B, 11B, 12B, and 13B) has a higher color purity (e.g., a greener color). This helps to improve the color gamut of quantum dot display products and meet the design requirements of display products with a higher color gamut.

[0216] The above description is merely a specific embodiment of the present application, but the scope of protection of the present application is not limited thereto. Any changes or substitutions that can be easily conceived by a person skilled in the art within the technical scope disclosed in this application should be included in the scope of protection of this application. Therefore, the scope of protection of this application should be based on the scope of protection of the claims.

Claims

1. A display panel, wherein, Comprising: A plurality of light-emitting devices arranged in an array on the substrate; A color conversion layer located on the light-emitting side of the light-emitting devices, including a green conversion pattern; A filter layer located on the side of the color conversion layer away from the light-emitting devices; the filter layer includes a green filter pattern, and the orthographic projection of the green filter pattern on the substrate overlaps with the orthographic projection of the green conversion pattern on the substrate; Wherein, the absolute value of the difference between the wavelength at the peak position of the spectrum of the green filter pattern and the wavelength at the first peak position of the spectrum of the green conversion pattern is less than or equal to 10 nm.

2. The display panel according to claim 1, wherein, The full width at half maximum (FWHM) of the spectrum of the green filter pattern is greater than or equal to 1.5 times and less than or equal to 3 times the first FWHM of the spectrum of the green conversion pattern.

3. The display panel according to claim 2, wherein, The light-emitting colors of the plurality of light-emitting devices are all blue; the spectrum of the green conversion pattern includes a first band and a second band, the first band is a green light band, and the second band is a blue light band; the wavelength of the second band is less than the wavelength of the first band; The first peak and the first FWHM are respectively the peak and the FWHM of the first band; Wherein, the wavelength at the starting point at the FWHM position of the spectrum of the green filter pattern is greater than or equal to the wavelength at the starting point at the first FWHM position of the spectrum of the green conversion pattern minus 25 nm, and the wavelength at the starting point at the FWHM position of the spectrum of the green filter pattern is less than or equal to the wavelength at the starting point at the first FWHM position of the spectrum of the green conversion pattern minus 5 nm.

4. The display panel according to claim 3, wherein, The wavelength at the ending point at the FWHM position of the spectrum of the green filter pattern is greater than or equal to the wavelength at the ending point at the first FWHM position of the spectrum of the green conversion pattern plus 10 nm, and the wavelength at the ending point at the FWHM position of the spectrum of the green filter pattern is less than or equal to the wavelength at the ending point at the first FWHM position of the spectrum of the green conversion pattern plus 35 nm.

5. The display panel according to claim 4, wherein, The FWHM of the second band of the spectrum of the green conversion pattern is the second FWHM; The starting wavelength of the spectrum of the green filter pattern is greater than or equal to the starting wavelength of the second band and less than or equal to the sum of the starting wavelength of the second band and 3 / 4 times the second FWHM.

6. The display panel according to claim 4, wherein, The starting wavelength of the first band in the spectrum of the green conversion pattern is greater than or equal to the sum of the starting wavelength of the second band and 3 / 4 times the second FWHM, and less than or equal to the sum of the starting wavelength of the second band and 3 / 2 times the second FWHM.

7. The display panel according to claim 4, wherein, The wavelength at the overlapping point of the first band in the spectrum of the green conversion pattern and the spectrum of the green filter pattern at the ending position is greater than or equal to the sum of the wavelength at the first peak position of the spectrum of the green conversion pattern and 2 times the first FWHM, and less than or equal to the sum of the wavelength at the first peak position of the spectrum of the green conversion pattern and 5 times the first FWHM.

8. The display panel according to any one of claims 1 to 7, wherein, The first sub-pixel, the second sub-pixel, and the third sub-pixel of the display panel; the first sub-pixel includes the light-emitting device, the green conversion pattern, and the green filter pattern sequentially disposed on the substrate; Wherein, the wavelength range at the first peak position of the spectrum of the green conversion pattern is 520 nm to 550 nm, the starting wavelength range of the second peak of the spectrum of the green conversion pattern is 450 nm to 460 nm, the starting wavelength range at the first half-peak width position of the spectrum of the green conversion pattern is 495 nm to 530 nm, and the ending wavelength range at the first half-peak width position of the spectrum of the green conversion pattern is 535 nm to 570 nm.

9. The display panel according to claim 8, wherein, The wavelength range at the peak position of the spectrum of the green filter pattern is 520 nm to 540 nm, the starting wavelength range of the spectrum of the green filter pattern is 460 nm to 470 nm, the starting wavelength range of the first band in the spectrum of the green conversion pattern is 475 nm to 490 nm, the wavelength range of the overlapping point of the first band in the spectrum of the green conversion pattern at the ending position and the spectrum of the green filter pattern is 620 nm to 680 nm, the ending wavelength range at the half-peak width position of the spectrum of the green filter pattern is 570 nm to 590 nm, and the starting wavelength range at the half-peak width position of the spectrum of the green filter pattern is 480 nm to 495 nm.

10. The display panel according to claim 9, wherein, The wavelength at the peak position of the spectrum of the first sub-pixel is 527 ± 1 nm, and the half-peak width of the spectrum of the green sub-pixel is 32.4 ± 0.5 nm.

11. The display panel according to claim 8, wherein, The wavelength range at the peak position of the spectrum of the green filter pattern is 520 nm to 535 nm, the starting wavelength range of the spectrum of the green filter pattern is 460 nm to 470 nm, the starting wavelength range of the first band in the spectrum of the green conversion pattern is 475 nm to 490 nm, the wavelength range of the overlapping point of the first band in the spectrum of the green conversion pattern at the ending position and the spectrum of the green filter pattern is 590 nm to 650 nm, the ending wavelength range at the half-peak width position of the spectrum of the green filter pattern is 570 nm to 585 nm, and the starting wavelength range at the half-peak width position of the spectrum of the green filter pattern is 485 nm to 495 nm.

12. The display panel according to claim 11, wherein, The wavelength at the peak position of the spectrum of the first sub-pixel is 525 ± 1 nm, and the half-peak width of the spectrum of the green sub-pixel is 31.2 ± 0.5 nm.

13. The display panel according to claim 8, wherein, The wavelength range at the peak position of the spectrum of the green filter pattern is 525 nm to 535 nm, the starting wavelength range of the spectrum of the green filter pattern is 460 nm to 470 nm, the starting wavelength range of the first band in the spectrum of the green conversion pattern is 475 nm to 485 nm, the wavelength range of the overlapping point of the first band in the spectrum of the green conversion pattern with the spectrum of the green filter pattern at the termination position is 590 nm to 635 nm, the wavelength range of the termination point at the half-peak width position of the spectrum of the green filter pattern is 570 nm to 580 nm, and the wavelength range of the starting point at the half-peak width position of the spectrum of the green filter pattern is 485 nm to 495 nm.

14. The display panel according to claim 13, wherein, The wavelength at the peak position of the spectrum of the first sub-pixel is 523 ± 1 nm, and the half-peak width of the spectrum of the green sub-pixel is 31.0 ± 0.5 nm.

15. The display panel according to claim 8, wherein, The wavelength range at the peak position of the spectrum of the green filter pattern is 525 nm to 530 nm, the starting wavelength range of the spectrum of the green filter pattern is 460 nm to 465 nm, the starting wavelength range of the first band in the spectrum of the green conversion pattern is 475 nm to 480 nm, the wavelength range of the overlapping point of the first band in the spectrum of the green conversion pattern with the spectrum of the green filter pattern at the termination position is 590 nm to 620 nm, the wavelength range of the termination point at the half-peak width position of the spectrum of the green filter pattern is 570 nm to 580 nm, and the wavelength range of the starting point at the half-peak width position of the spectrum of the green filter pattern is 485 nm to 495 nm.

16. The display panel according to claim 15, wherein, The wavelength at the peak position of the spectrum of the first sub-pixel is 521 ± 1 nm, and the half-peak width of the spectrum of the green sub-pixel is 30.8 ± 0.5 nm.

17. The display panel according to claim 8, wherein, The second sub-pixel includes the light-emitting device, the red conversion pattern, and the red filter pattern sequentially arranged on the substrate; the coordinate value of the color coordinate of the second sub-pixel in the first direction is 0.704 ± 0.005, and the coordinate value of the color coordinate of the second sub-pixel in the second direction is 0.294 ± 0.005; the first direction is the X direction in the rectangular coordinate system, and the second direction is the Y direction in the rectangular coordinate system; The third sub-pixel includes the light-emitting device, the light-transmitting pattern, and the blue filter pattern sequentially arranged on the substrate, the coordinate value of the color coordinate of the third sub-pixel in the first direction is 0.141 ± 0.5, and the coordinate value of the color coordinate of the third sub-pixel in the second direction is 0.046 ± 0.

5.

18. A display device, wherein, A display panel as described in claims 1 to 17 is included.

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